/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "ape/sections.internal.h"
#include "libc/assert.h"
#include "libc/atomic.h"
#include "libc/calls/calls.h"
#include "libc/calls/pledge.h"
#include "libc/calls/struct/dirent.h"
#include "libc/calls/struct/flock.h"
#include "libc/calls/struct/iovec.h"
#include "libc/calls/struct/rusage.h"
#include "libc/calls/struct/sigaction.h"
#include "libc/calls/struct/sigset.h"
#include "libc/calls/struct/stat.h"
#include "libc/calls/struct/termios.h"
#include "libc/calls/struct/timespec.h"
#include "libc/calls/termios.h"
#include "libc/dce.h"
#include "libc/dns/dns.h"
#include "libc/dns/hoststxt.h"
#include "libc/dos.internal.h"
#include "libc/errno.h"
#include "libc/fmt/conv.h"
#include "libc/fmt/itoa.h"
#include "libc/fmt/wintime.internal.h"
#include "libc/intrin/atomic.h"
#include "libc/intrin/bits.h"
#include "libc/intrin/bsr.h"
#include "libc/intrin/likely.h"
#include "libc/intrin/newbie.h"
#include "libc/intrin/nomultics.internal.h"
#include "libc/intrin/safemacros.internal.h"
#include "libc/log/appendresourcereport.internal.h"
#include "libc/log/check.h"
#include "libc/log/log.h"
#include "libc/macros.internal.h"
#include "libc/math.h"
#include "libc/mem/alloca.h"
#include "libc/mem/gc.h"
#include "libc/mem/gc.internal.h"
#include "libc/mem/mem.h"
#include "libc/nexgen32e/crc32.h"
#include "libc/nexgen32e/rdtsc.h"
#include "libc/nexgen32e/vendor.internal.h"
#include "libc/nexgen32e/x86feature.h"
#include "libc/nt/enum/fileflagandattributes.h"
#include "libc/runtime/clktck.h"
#include "libc/runtime/internal.h"
#include "libc/runtime/memtrack.internal.h"
#include "libc/runtime/runtime.h"
#include "libc/runtime/stack.h"
#include "libc/sock/goodsocket.internal.h"
#include "libc/sock/sock.h"
#include "libc/sock/struct/pollfd.h"
#include "libc/sock/struct/sockaddr.h"
#include "libc/stdio/append.h"
#include "libc/stdio/hex.internal.h"
#include "libc/stdio/rand.h"
#include "libc/stdio/stdio.h"
#include "libc/str/slice.h"
#include "libc/str/str.h"
#include "libc/str/strwidth.h"
#include "libc/sysv/consts/af.h"
#include "libc/sysv/consts/auxv.h"
#include "libc/sysv/consts/clock.h"
#include "libc/sysv/consts/clone.h"
#include "libc/sysv/consts/dt.h"
#include "libc/sysv/consts/ex.h"
#include "libc/sysv/consts/exit.h"
#include "libc/sysv/consts/f.h"
#include "libc/sysv/consts/hwcap.h"
#include "libc/sysv/consts/inaddr.h"
#include "libc/sysv/consts/ipproto.h"
#include "libc/sysv/consts/madv.h"
#include "libc/sysv/consts/map.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/consts/poll.h"
#include "libc/sysv/consts/pr.h"
#include "libc/sysv/consts/prot.h"
#include "libc/sysv/consts/rusage.h"
#include "libc/sysv/consts/s.h"
#include "libc/sysv/consts/sa.h"
#include "libc/sysv/consts/sig.h"
#include "libc/sysv/consts/sock.h"
#include "libc/sysv/consts/termios.h"
#include "libc/sysv/consts/timer.h"
#include "libc/sysv/consts/w.h"
#include "libc/sysv/errfuns.h"
#include "libc/thread/thread.h"
#include "libc/thread/tls.h"
#include "libc/x/x.h"
#include "libc/x/xasprintf.h"
#include "libc/zip.internal.h"
#include "net/http/escape.h"
#include "net/http/http.h"
#include "net/http/ip.h"
#include "net/http/tokenbucket.h"
#include "net/http/url.h"
#include "net/https/https.h"
#include "third_party/getopt/getopt.internal.h"
#include "third_party/lua/cosmo.h"
#include "third_party/lua/lauxlib.h"
#include "third_party/lua/lrepl.h"
#include "third_party/lua/lualib.h"
#include "third_party/lua/lunix.h"
#include "third_party/mbedtls/ctr_drbg.h"
#include "third_party/mbedtls/debug.h"
#include "third_party/mbedtls/iana.h"
#include "third_party/mbedtls/net_sockets.h"
#include "third_party/mbedtls/oid.h"
#include "third_party/mbedtls/san.h"
#include "third_party/mbedtls/sha1.h"
#include "third_party/mbedtls/ssl.h"
#include "third_party/mbedtls/ssl_ticket.h"
#include "third_party/mbedtls/x509.h"
#include "third_party/mbedtls/x509_crt.h"
#include "third_party/zlib/zlib.h"
#include "tool/args/args.h"
#include "tool/build/lib/case.h"
#include "tool/net/lfinger.h"
#include "tool/net/lfuncs.h"
#include "tool/net/ljson.h"
#include "tool/net/lpath.h"
#include "tool/net/luacheck.h"
#include "tool/net/sandbox.h"
#pragma GCC diagnostic ignored "-Wunused-variable"
STATIC_STACK_ALIGN(GetStackSize());
__static_yoink("zipos");
#ifdef USE_BLINK
__static_yoink("blink_linux_aarch64"); // for raspberry pi
__static_yoink("blink_xnu_aarch64"); // is apple silicon
#endif
/**
* @fileoverview redbean - single-file distributable web server
*
* redbean makes it possible to share web applications that run offline
* as a single-file αcτµαlly pδrταblε εxεcµταblε zip archive which
* contains your assets. All you need to do is download the redbean.com
* program below, change the filename to .zip, add your content in a zip
* editing tool, and then change the extension back to .com.
*
* redbean can serve 1 million+ gzip encoded responses per second on a
* cheap personal computer. That performance is thanks to zip and gzip
* using the same compression format, which enables kernelspace copies.
* Another reason redbean goes fast is that it's a tiny static binary,
* which makes fork memory paging nearly free.
*
* redbean is also easy to modify to suit your own needs. The program
* itself is written as a single .c file. It embeds the Lua programming
* language and SQLite which let you write dynamic pages.
*/
#ifndef REDBEAN
#define REDBEAN "redbean"
#endif
#define VERSION 0x020200
#define HASH_LOAD_FACTOR /* 1. / */ 4
#define MONITOR_MICROS 150000
#define READ(F, P, N) readv(F, &(struct iovec){P, N}, 1)
#define WRITE(F, P, N) writev(F, &(struct iovec){P, N}, 1)
#define AppendCrlf(P) mempcpy(P, "\r\n", 2)
#define HasHeader(H) (!!cpm.msg.headers[H].a)
#define HeaderData(H) (inbuf.p + cpm.msg.headers[H].a)
#define HeaderLength(H) (cpm.msg.headers[H].b - cpm.msg.headers[H].a)
#define HeaderEqualCase(H, S) \
SlicesEqualCase(S, strlen(S), HeaderData(H), HeaderLength(H))
#define LockInc(P) \
atomic_fetch_add_explicit((_Atomic(typeof(*(P))) *)(P), +1, \
memory_order_relaxed)
#define LockDec(P) \
atomic_fetch_add_explicit((_Atomic(typeof(*(P))) *)(P), -1, \
memory_order_relaxed)
#define TRACE_BEGIN \
do { \
if (!IsTiny()) { \
if (funtrace) { \
ftrace_enabled(+1); \
} \
if (systrace) { \
strace_enabled(+1); \
} \
} \
} while (0)
#define TRACE_END \
do { \
if (!IsTiny()) { \
if (funtrace) { \
ftrace_enabled(-1); \
} \
if (systrace) { \
strace_enabled(-1); \
} \
} \
} while (0)
// letters not used: INOQYnoqwxy
// digits not used: 0123456789
// puncts not used: !"#$&'()+,-./;<=>@[\]^_`{|}~
#define GETOPTS \
"*%BEJSVXZabdfghijkmsuvzA:C:D:F:G:H:K:L:M:P:R:T:U:W:c:e:l:p:r:t:w:"
static const uint8_t kGzipHeader[] = {
0x1F, // MAGNUM
0x8B, // MAGNUM
0x08, // CM: DEFLATE
0x00, // FLG: NONE
0x00, // MTIME: NONE
0x00, //
0x00, //
0x00, //
0x00, // XFL
kZipOsUnix, // OS
};
static const char *const kIndexPaths[] = {
#ifndef STATIC
"index.lua",
#endif
"index.html",
};
static const char *const kAlpn[] = {
"http/1.1",
NULL,
};
struct Buffer {
size_t n, c;
char *p;
};
struct TlsBio {
int fd, c;
unsigned a, b;
unsigned char t[4000];
unsigned char u[1430];
};
struct Strings {
size_t n, c;
struct String {
size_t n;
const char *s;
} *p;
};
struct DeflateGenerator {
int t;
void *b;
size_t i;
uint32_t c;
uint32_t z;
z_stream s;
struct Asset *a;
};
static struct Ips {
size_t n;
uint32_t *p;
} ips;
static struct Ports {
size_t n;
uint16_t *p;
} ports;
static struct Servers {
size_t n;
struct Server {
int fd;
struct sockaddr_in addr;
} *p;
} servers;
static struct Freelist {
size_t n, c;
void **p;
} freelist;
static struct Unmaplist {
size_t n, c;
struct Unmap {
int f;
void *p;
size_t n;
} *p;
} unmaplist;
static struct Psks {
size_t n;
struct Psk {
char *key;
size_t key_len;
char *identity;
size_t identity_len;
char *s;
} *p;
} psks;
static struct Suites {
size_t n;
uint16_t *p;
} suites;
static struct Certs {
size_t n;
struct Cert *p;
} certs;
static struct Redirects {
size_t n;
struct Redirect {
int code;
struct String path;
struct String location;
} *p;
} redirects;
static struct Assets {
uint32_t n;
struct Asset {
bool istext;
uint32_t hash;
uint64_t cf;
uint64_t lf;
int64_t lastmodified;
char *lastmodifiedstr;
struct File {
struct String path;
struct stat st;
} *file;
} *p;
} assets;
static struct TrustedIps {
size_t n;
struct TrustedIp {
uint32_t ip;
uint32_t mask;
} *p;
} trustedips;
struct TokenBucket {
signed char cidr;
signed char reject;
signed char ignore;
signed char ban;
struct timespec replenish;
union {
atomic_schar *b;
atomic_uint_fast64_t *w;
};
} tokenbucket;
struct Blackhole {
struct sockaddr_un addr;
int fd;
} blackhole;
static struct Shared {
int workers;
struct timespec nowish;
struct timespec lastreindex;
struct timespec lastmeltdown;
char currentdate[32];
struct rusage server;
struct rusage children;
struct Counters {
#define C(x) long x;
#include "tool/net/counters.inc"
#undef C
} c;
pthread_spinlock_t montermlock;
} *shared;
static const char kCounterNames[] =
#define C(x) #x "\0"
#include "tool/net/counters.inc"
#undef C
;
typedef ssize_t (*reader_f)(int, void *, size_t);
typedef ssize_t (*writer_f)(int, struct iovec *, int);
struct ClearedPerMessage {
bool istext;
bool branded;
bool hascontenttype;
bool gotcachecontrol;
bool gotxcontenttypeoptions;
bool iswebsocket;
int frags;
int statuscode;
int isyielding;
char *outbuf;
char *content;
size_t gzipped;
size_t contentlength;
char *luaheaderp;
const char *referrerpolicy;
size_t msgsize;
ssize_t (*generator)(struct iovec[3]);
struct Strings loops;
struct HttpMessage msg;
} cpm;
static bool suiteb;
static bool killed;
static bool zombied;
static bool usingssl;
static bool funtrace;
static bool systrace;
static bool meltdown;
static bool unsecure;
static bool norsagen;
static bool printport;
static bool daemonize;
static bool logrusage;
static bool logbodies;
static bool requiressl;
static bool sslcliused;
static bool loglatency;
static bool terminated;
static bool uniprocess;
static bool invalidated;
static bool logmessages;
static bool isinitialized;
static bool sslinitialized;
static bool sslfetchverify;
static bool selfmodifiable;
static bool interpretermode;
static bool sslclientverify;
static bool connectionclose;
static bool hasonloglatency;
static bool hasonworkerstop;
static bool isexitingworker;
static bool hasonworkerstart;
static bool leakcrashreports;
static bool hasonhttprequest;
static bool ishandlingrequest;
static bool listeningonport443;
static bool hasonprocesscreate;
static bool hasonprocessdestroy;
static bool ishandlingconnection;
static bool hasonclientconnection;
static bool evadedragnetsurveillance;
static int zfd;
static int gmtoff;
static int client;
static int mainpid;
static int sandboxed;
static int changeuid;
static int changegid;
static int maxworkers;
static int shutdownsig;
static int sslpskindex;
static int oldloglevel;
static int messageshandled;
static int sslticketlifetime;
static uint32_t clientaddrsize;
static atomic_int terminatemonitor;
static char *brand;
static size_t zsize;
static lua_State *GL;
static lua_State *YL;
static uint8_t *zmap;
static uint8_t *zcdir;
static size_t hdrsize;
static size_t amtread;
static reader_f reader;
static writer_f writer;
static char *extrahdrs;
static const char *zpath;
static char *serverheader;
static char gzip_footer[8];
static long maxpayloadsize;
static const char *pidpath;
static const char *logpath;
static uint32_t *interfaces;
static struct pollfd *polls;
static size_t payloadlength;
static int64_t cacheseconds;
static char *cachedirective;
static const char *monitortty;
static struct Strings stagedirs;
static struct Strings hidepaths;
static const char *launchbrowser;
static const char ctIdx = 'c'; // a pseudo variable to get address of
static pthread_t monitorth;
static struct Buffer inbuf_actual;
static struct Buffer inbuf;
static struct Buffer oldin;
static struct Buffer hdrbuf;
static struct timeval timeout;
static struct Buffer effectivepath;
static struct timespec heartbeatinterval;
static struct Url url;
static struct stat zst;
static struct timespec startread;
static struct timespec lastrefresh;
static struct timespec startserver;
static struct timespec startrequest;
static struct timespec lastheartbeat;
static struct timespec startconnection;
static struct sockaddr_in clientaddr;
static struct sockaddr_in *serveraddr;
static mbedtls_ssl_config conf;
static mbedtls_ssl_context ssl;
static mbedtls_ctr_drbg_context rng;
static mbedtls_ssl_ticket_context ssltick;
static mbedtls_ssl_config confcli;
static mbedtls_ssl_context sslcli;
static mbedtls_ctr_drbg_context rngcli;
static struct TlsBio g_bio;
static char slashpath[PATH_MAX];
static struct DeflateGenerator dg;
static char *Route(const char *, size_t, const char *, size_t);
static char *RouteHost(const char *, size_t, const char *, size_t);
static char *RoutePath(const char *, size_t);
static char *HandleAsset(struct Asset *, const char *, size_t);
static char *ServeAsset(struct Asset *, const char *, size_t);
static char *SetStatus(unsigned, const char *);
static void TlsInit(void);
static void OnChld(void) {
zombied = true;
}
static void OnUsr1(void) {
invalidated = true;
}
static void OnUsr2(void) {
meltdown = true;
}
static void OnTerm(int sig) {
if (!terminated) {
shutdownsig = sig;
terminated = true;
} else {
killed = true;
}
}
static void OnInt(int sig) {
OnTerm(sig);
}
static void OnHup(int sig) {
if (daemonize) {
OnUsr1();
} else {
OnTerm(sig);
}
}
static void Free(void *p) {
free(*(void **)p);
*(void **)p = 0;
}
static long ParseInt(const char *s) {
return strtol(s, 0, 0);
}
static void *FreeLater(void *p) {
if (p) {
if (++freelist.n > freelist.c) {
freelist.c = freelist.n + (freelist.n >> 1);
freelist.p = xrealloc(freelist.p, freelist.c * sizeof(*freelist.p));
}
freelist.p[freelist.n - 1] = p;
}
return p;
}
static void UnmapLater(int f, void *p, size_t n) {
if (++unmaplist.n > unmaplist.c) {
unmaplist.c = unmaplist.n + (unmaplist.n >> 1);
unmaplist.p = xrealloc(unmaplist.p, unmaplist.c * sizeof(*unmaplist.p));
}
unmaplist.p[unmaplist.n - 1].f = f;
unmaplist.p[unmaplist.n - 1].p = p;
unmaplist.p[unmaplist.n - 1].n = n;
}
static void CollectGarbage(void) {
__log_level = oldloglevel;
DestroyHttpMessage(&cpm.msg);
while (freelist.n) {
free(freelist.p[--freelist.n]);
}
while (unmaplist.n) {
--unmaplist.n;
LOGIFNEG1(munmap(unmaplist.p[unmaplist.n].p, unmaplist.p[unmaplist.n].n));
LOGIFNEG1(close(unmaplist.p[unmaplist.n].f));
}
}
static void UseOutput(void) {
cpm.content = FreeLater(cpm.outbuf);
cpm.contentlength = appendz(cpm.outbuf).i;
cpm.outbuf = 0;
}
static void DropOutput(void) {
FreeLater(cpm.outbuf);
cpm.outbuf = 0;
}
static bool ShouldAvoidGzip(void) {
return (IsGenuineBlink() && !X86_HAVE(JIT));
}
static char *MergePaths(const char *p, size_t n, const char *q, size_t m,
size_t *z) {
char *r;
if (n && p[n - 1] == '/') --n;
if (m && q[0] == '/') ++q, --m;
r = xmalloc(n + 1 + m + 1);
mempcpy(mempcpy(mempcpy(mempcpy(r, p, n), "/", 1), q, m), "", 1);
if (z) *z = n + 1 + m;
return r;
}
static long FindRedirect(const char *s, size_t n) {
int c, m, l, r;
l = 0;
r = redirects.n - 1;
while (l <= r) {
m = (l & r) + ((l ^ r) >> 1); // floor((a+b)/2)
c = CompareSlices(redirects.p[m].path.s, redirects.p[m].path.n, s, n);
if (c < 0) {
l = m + 1;
} else if (c > 0) {
r = m - 1;
} else {
return m;
}
}
return -1;
}
static mbedtls_x509_crt *GetTrustedCertificate(mbedtls_x509_name *name) {
size_t i;
for (i = 0; i < certs.n; ++i) {
if (certs.p[i].cert &&
!mbedtls_x509_name_cmp(name, &certs.p[i].cert->subject)) {
return certs.p[i].cert;
}
}
return 0;
}
static void UseCertificate(mbedtls_ssl_config *c, struct Cert *kp,
const char *role) {
VERBOSEF("(ssl) using %s certificate %`'s for HTTPS %s",
mbedtls_pk_get_name(&kp->cert->pk),
_gc(FormatX509Name(&kp->cert->subject)), role);
CHECK_EQ(0, mbedtls_ssl_conf_own_cert(c, kp->cert, kp->key));
}
static void AppendCert(mbedtls_x509_crt *cert, mbedtls_pk_context *key) {
certs.p = realloc(certs.p, ++certs.n * sizeof(*certs.p));
certs.p[certs.n - 1].cert = cert;
certs.p[certs.n - 1].key = key;
}
static void InternCertificate(mbedtls_x509_crt *cert, mbedtls_x509_crt *prev) {
int r;
size_t i;
if (cert->next) InternCertificate(cert->next, cert);
if (prev) {
if (mbedtls_x509_crt_check_parent(prev, cert, 1)) {
DEBUGF("(ssl) unbundling %`'s from %`'s",
_gc(FormatX509Name(&prev->subject)),
_gc(FormatX509Name(&cert->subject)));
prev->next = 0;
} else if ((r = mbedtls_x509_crt_check_signature(prev, cert, 0))) {
WARNF("(ssl) invalid signature for %`'s -> %`'s (-0x%04x)",
_gc(FormatX509Name(&prev->subject)),
_gc(FormatX509Name(&cert->subject)), -r);
}
}
if (mbedtls_x509_time_is_past(&cert->valid_to)) {
WARNF("(ssl) certificate %`'s is expired",
_gc(FormatX509Name(&cert->subject)));
} else if (mbedtls_x509_time_is_future(&cert->valid_from)) {
WARNF("(ssl) certificate %`'s is from the future",
_gc(FormatX509Name(&cert->subject)));
}
for (i = 0; i < certs.n; ++i) {
if (!certs.p[i].cert && certs.p[i].key &&
!mbedtls_pk_check_pair(&cert->pk, certs.p[i].key)) {
certs.p[i].cert = cert;
return;
}
}
LogCertificate("loaded certificate", cert);
if (!cert->next && !IsSelfSigned(cert) && cert->max_pathlen) {
for (i = 0; i < certs.n; ++i) {
if (!certs.p[i].cert) continue;
if (mbedtls_pk_can_do(&cert->pk, certs.p[i].cert->sig_pk) &&
!mbedtls_x509_crt_check_parent(cert, certs.p[i].cert, 1) &&
!IsSelfSigned(certs.p[i].cert)) {
if (ChainCertificate(cert, certs.p[i].cert)) break;
}
}
}
if (!IsSelfSigned(cert)) {
for (i = 0; i < certs.n; ++i) {
if (!certs.p[i].cert) continue;
if (certs.p[i].cert->next) continue;
if (certs.p[i].cert->max_pathlen &&
mbedtls_pk_can_do(&certs.p[i].cert->pk, cert->sig_pk) &&
!mbedtls_x509_crt_check_parent(certs.p[i].cert, cert, 1)) {
ChainCertificate(certs.p[i].cert, cert);
}
}
}
AppendCert(cert, 0);
}
static void ProgramCertificate(const char *p, size_t n) {
int rc;
unsigned char *waqapi;
mbedtls_x509_crt *cert;
waqapi = malloc(n + 1);
memcpy(waqapi, p, n);
waqapi[n] = 0;
cert = calloc(1, sizeof(mbedtls_x509_crt));
rc = mbedtls_x509_crt_parse(cert, waqapi, n + 1);
mbedtls_platform_zeroize(waqapi, n);
free(waqapi);
if (rc < 0) {
WARNF("(ssl) failed to load certificate (grep -0x%04x)", rc);
return;
} else if (rc > 0) {
VERBOSEF("(ssl) certificate bundle partially loaded");
}
InternCertificate(cert, 0);
}
static void ProgramPrivateKey(const char *p, size_t n) {
int rc;
size_t i;
unsigned char *waqapi;
mbedtls_pk_context *key;
waqapi = malloc(n + 1);
memcpy(waqapi, p, n);
waqapi[n] = 0;
key = calloc(1, sizeof(mbedtls_pk_context));
rc = mbedtls_pk_parse_key(key, waqapi, n + 1, 0, 0);
mbedtls_platform_zeroize(waqapi, n);
free(waqapi);
if (rc != 0) FATALF("(ssl) error: load key (grep -0x%04x)", -rc);
for (i = 0; i < certs.n; ++i) {
if (certs.p[i].cert && !certs.p[i].key &&
!mbedtls_pk_check_pair(&certs.p[i].cert->pk, key)) {
certs.p[i].key = key;
return;
}
}
VERBOSEF("(ssl) loaded private key");
AppendCert(0, key);
}
static void ProgramFile(const char *path, void program(const char *, size_t)) {
char *p;
size_t n;
DEBUGF("(srvr) ProgramFile(%`'s)", path);
if ((p = xslurp(path, &n))) {
program(p, n);
mbedtls_platform_zeroize(p, n);
free(p);
} else {
FATALF("(srvr) error: failed to read file %`'s", path);
}
}
static void ProgramPort(long port) {
if (!(0 <= port && port <= 65535)) {
FATALF("(cfg) error: bad port: %d", port);
}
if (port == 443) listeningonport443 = true;
ports.p = realloc(ports.p, ++ports.n * sizeof(*ports.p));
ports.p[ports.n - 1] = port;
}
static void ProgramMaxPayloadSize(long x) {
maxpayloadsize = MAX(1450, x);
}
static void ProgramSslTicketLifetime(long x) {
sslticketlifetime = x;
}
static void ProgramAddr(const char *addr) {
ssize_t rc;
int64_t ip;
if ((ip = ParseIp(addr, -1)) == -1) {
if (!IsTiny()) {
struct addrinfo *ai = NULL;
struct addrinfo hint = {AI_NUMERICSERV, AF_INET, SOCK_STREAM,
IPPROTO_TCP};
if ((rc = getaddrinfo(addr, "0", &hint, &ai)) != EAI_SUCCESS) {
FATALF("(cfg) error: bad addr: %s (EAI_%s)", addr, gai_strerror(rc));
}
ip = ntohl(ai->ai_addr4->sin_addr.s_addr);
freeaddrinfo(ai);
} else {
FATALF("(cfg) error: ProgramAddr() needs an IP in MODE=tiny: %s", addr);
}
}
ips.p = realloc(ips.p, ++ips.n * sizeof(*ips.p));
ips.p[ips.n - 1] = ip;
}
static void ProgramRedirect(int code, const char *sp, size_t sn, const char *dp,
size_t dn) {
long i, j;
struct Redirect r;
if (code && code != 301 && code != 302 && code != 307 && code != 308) {
FATALF("(cfg) error: unsupported redirect code %d", code);
}
if (!(FreeLater(EncodeHttpHeaderValue(dp, dn, 0)))) {
FATALF("(cfg) error: invalid location %s", dp);
}
r.code = code;
r.path.s = sp;
r.path.n = sn;
r.location.s = dp;
r.location.n = dn;
if ((i = FindRedirect(r.path.s, r.path.n)) != -1) {
redirects.p[i] = r;
} else {
i = redirects.n;
redirects.p = xrealloc(redirects.p, (i + 1) * sizeof(*redirects.p));
for (j = i; j; --j) {
if (CompareSlices(r.path.s, r.path.n, redirects.p[j - 1].path.s,
redirects.p[j - 1].path.n) < 0) {
redirects.p[j] = redirects.p[j - 1];
} else {
break;
}
}
redirects.p[j] = r;
++redirects.n;
}
}
static void ProgramRedirectArg(int code, const char *s) {
size_t n;
const char *p;
n = strlen(s);
if (!(p = memchr(s, '=', n))) {
FATALF("(cfg) error: redirect arg missing '='");
}
ProgramRedirect(code, s, p - s, p + 1, n - (p - s + 1));
}
static void ProgramTrustedIp(uint32_t ip, int cidr) {
uint32_t mask;
mask = 0xffffffffu << (32 - cidr);
trustedips.p = xrealloc(trustedips.p, ++trustedips.n * sizeof(*trustedips.p));
trustedips.p[trustedips.n - 1].ip = ip;
trustedips.p[trustedips.n - 1].mask = mask;
}
static bool IsTrustedIp(uint32_t ip) {
int i;
uint32_t *p;
if (interfaces) {
for (p = interfaces; *p; ++p) {
if (ip == *p && !IsTestnetIp(ip)) {
DEBUGF("(token) ip is trusted because it's %s", "a local interface");
return true;
}
}
}
if (trustedips.n) {
for (i = 0; i < trustedips.n; ++i) {
if ((ip & trustedips.p[i].mask) == trustedips.p[i].ip) {
DEBUGF("(token) ip is trusted because it's %s", "whitelisted");
return true;
}
}
return false;
} else if (IsPrivateIp(ip) && !IsTestnetIp(ip)) {
DEBUGF("(token) ip is trusted because it's %s", "private");
return true;
} else if (IsLoopbackIp(ip)) {
DEBUGF("(token) ip is trusted because it's %s", "loopback");
return true;
} else {
return false;
}
}
static void DescribeAddress(char buf[40], uint32_t addr, uint16_t port) {
char *p;
p = buf;
p = FormatUint32(p, (addr & 0xFF000000) >> 030), *p++ = '.';
p = FormatUint32(p, (addr & 0x00FF0000) >> 020), *p++ = '.';
p = FormatUint32(p, (addr & 0x0000FF00) >> 010), *p++ = '.';
p = FormatUint32(p, (addr & 0x000000FF) >> 000), *p++ = ':';
p = FormatUint32(p, port);
*p = '\0';
assert(p - buf < 40);
}
static inline int GetServerAddr(uint32_t *ip, uint16_t *port) {
*ip = ntohl(serveraddr->sin_addr.s_addr);
if (port) *port = ntohs(serveraddr->sin_port);
return 0;
}
static inline int GetClientAddr(uint32_t *ip, uint16_t *port) {
*ip = ntohl(clientaddr.sin_addr.s_addr);
if (port) *port = ntohs(clientaddr.sin_port);
return 0;
}
static inline int GetRemoteAddr(uint32_t *ip, uint16_t *port) {
GetClientAddr(ip, port);
if (HasHeader(kHttpXForwardedFor)) {
if (IsTrustedIp(*ip)) {
if (ParseForwarded(HeaderData(kHttpXForwardedFor),
HeaderLength(kHttpXForwardedFor), ip, port) == -1) {
VERBOSEF("could not parse x-forwarded-for %`'.*s len=%ld",
HeaderLength(kHttpXForwardedFor),
HeaderData(kHttpXForwardedFor),
HeaderLength(kHttpXForwardedFor));
return -1;
}
} else {
WARNF(
"%hhu.%hhu.%hhu.%hhu isn't authorized to send x-forwarded-for %`'.*s",
*ip >> 24, *ip >> 16, *ip >> 8, *ip, HeaderLength(kHttpXForwardedFor),
HeaderData(kHttpXForwardedFor));
}
}
return 0;
}
static char *DescribeClient(void) {
char str[40];
uint16_t port;
uint32_t client;
static char description[128];
GetClientAddr(&client, &port);
if (HasHeader(kHttpXForwardedFor) && IsTrustedIp(client)) {
DescribeAddress(str, client, port);
snprintf(description, sizeof(description), "%'.*s via %s",
HeaderLength(kHttpXForwardedFor), HeaderData(kHttpXForwardedFor),
str);
} else {
DescribeAddress(description, client, port);
}
return description;
}
static char *DescribeServer(void) {
uint32_t ip;
uint16_t port;
static char serveraddrstr[40];
GetServerAddr(&ip, &port);
DescribeAddress(serveraddrstr, ip, port);
return serveraddrstr;
}
static void ProgramBrand(const char *s) {
char *p;
free(brand);
free(serverheader);
if (!(p = EncodeHttpHeaderValue(s, -1, 0))) {
FATALF("(cfg) error: brand isn't latin1 encodable: %`'s", s);
}
brand = strdup(s);
serverheader = xasprintf("Server: %s\r\n", p);
free(p);
}
static void ProgramUid(long x) {
changeuid = x;
}
static void ProgramGid(long x) {
changegid = x;
}
#define MINTIMEOUT 10
static void ProgramTimeout(long ms) {
ldiv_t d;
if (ms < 0) {
timeout.tv_sec = ms; /* -(keepalive seconds) */
timeout.tv_usec = 0;
} else {
if (ms < MINTIMEOUT) {
FATALF("(cfg) error: timeout needs to be %dms or greater", MINTIMEOUT);
}
d = ldiv(ms, 1000);
timeout.tv_sec = d.quot;
timeout.tv_usec = d.rem * 1000;
}
}
static void ProgramCache(long x, const char *s) {
cacheseconds = x;
if (s) cachedirective = strdup(s);
}
static void SetDefaults(void) {
ProgramBrand(_gc(xasprintf("%s/%hhd.%hhd.%hhd", REDBEAN, VERSION >> 020,
VERSION >> 010, VERSION >> 000)));
__log_level = kLogInfo;
maxpayloadsize = 64 * 1024;
ProgramCache(-1, "must-revalidate");
ProgramTimeout(60 * 1000);
ProgramSslTicketLifetime(24 * 60 * 60);
sslfetchverify = true;
}
static void AddString(struct Strings *l, const char *s, size_t n) {
if (++l->n > l->c) {
l->c = l->n + (l->n >> 1);
l->p = realloc(l->p, l->c * sizeof(*l->p));
}
l->p[l->n - 1].s = s;
l->p[l->n - 1].n = n;
}
static bool HasString(struct Strings *l, const char *s, size_t n) {
size_t i;
for (i = 0; i < l->n; ++i) {
if (SlicesEqual(l->p[i].s, l->p[i].n, s, n)) {
return true;
}
}
return false;
}
const char *DEFAULTLUAPATH = "/zip/.lua/?.lua;/zip/.lua/?/init.lua";
static void UpdateLuaPath(const char *s) {
#ifndef STATIC
lua_State *L = GL;
char *curpath = "";
char *respath = 0;
char *t;
int n = lua_gettop(L);
lua_getglobal(L, "package");
if (lua_istable(L, -1)) {
lua_getfield(L, -1, "path");
curpath = (void *)luaL_optstring(L, -1, "");
if ((t = strstr(curpath, DEFAULTLUAPATH))) {
// if the DEFAULT path is found, prepend the path in front of it
respath = xasprintf("%.*s%s/.lua/?.lua;%s/.lua/?/init.lua;%s",
t - curpath, curpath, s, s, t);
} else {
// if the DEFAULT path is not found, append to the end
respath = xasprintf("%s;%s/.lua/?.lua;%s/.lua/?/init.lua", curpath, s, s);
}
lua_pushstring(L, _gc(respath));
lua_setfield(L, -3, "path");
}
lua_settop(L, n);
#endif
}
static void ProgramDirectory(const char *path) {
char *s;
size_t n;
struct stat st;
if (stat(path, &st) == -1 || !S_ISDIR(st.st_mode)) {
FATALF("(cfg) error: not a directory: %`'s", path);
}
s = strdup(path);
n = strlen(s);
INFOF("(cfg) program directory: %s", s);
AddString(&stagedirs, s, n);
UpdateLuaPath(s);
}
static void ProgramHeader(const char *s) {
char *p, *v;
if ((p = strchr(s, ':')) && IsValidHttpToken(s, p - s) &&
(v = EncodeLatin1(p + 1, -1, 0, kControlC0 | kControlC1 | kControlWs))) {
switch (GetHttpHeader(s, p - s)) {
case kHttpDate:
case kHttpConnection:
case kHttpContentLength:
case kHttpContentEncoding:
case kHttpContentRange:
case kHttpLocation:
FATALF("(cfg) error: can't program header: %`'s", s);
case kHttpServer:
ProgramBrand(p + 1);
break;
default:
p = xasprintf("%s%.*s:%s\r\n", extrahdrs ? extrahdrs : "", p - s, s, v);
free(extrahdrs);
extrahdrs = p;
break;
}
free(v);
} else {
FATALF("(cfg) error: illegal header: %`'s", s);
}
}
static void ProgramLogPath(const char *s) {
int fd;
logpath = strdup(s);
fd = open(logpath, O_APPEND | O_WRONLY | O_CREAT, 0640);
if (fd == -1) {
WARNF("(srvr) open(%`'s) failed: %m", logpath);
return;
}
if (fd != 2) {
dup2(fd, 2);
close(fd);
}
}
static void ProgramPidPath(const char *s) {
pidpath = strdup(s);
}
static bool IsServerFd(int fd) {
size_t i;
for (i = 0; i < servers.n; ++i) {
if (servers.p[i].fd == fd) {
return true;
}
}
return false;
}
static void ChangeUser(void) {
if (changegid) {
if (setgid(changegid)) {
FATALF("(cfg) setgid() failed: %m");
}
}
// order matters
if (changeuid) {
if (setuid(changeuid)) {
FATALF("(cfg) setuid() failed: %m");
}
}
}
static void Daemonize(void) {
if (fork() > 0) exit(0);
setsid();
if (fork() > 0) _exit(0);
umask(0);
}
static void LogLuaError(const char *hook, const char *err) {
ERRORF("(lua) failed to run %s: %s", hook, err);
}
// handles `-e CODE` (frontloads web server code)
// handles `-i -e CODE` (interprets expression and exits)
static void LuaEvalCode(const char *code) {
lua_State *L = GL;
int status = luaL_loadstring(L, code);
if (status != LUA_OK || LuaCallWithTrace(L, 0, 0, NULL) != LUA_OK) {
LogLuaError("lua code", lua_tostring(L, -1));
lua_pop(L, 1); // pop error
exit(1);
}
AssertLuaStackIsAt(L, 0);
}
// handle `-F PATH` arg
static void LuaEvalFile(const char *path) {
char *f = _gc(xslurp(path, 0));
if (!f) FATALF("(cfg) error: failed to read file %`'s", path);
LuaEvalCode(f);
}
static bool LuaOnClientConnection(void) {
bool dropit = false;
#ifndef STATIC
uint32_t ip, serverip;
uint16_t port, serverport;
lua_State *L = GL;
lua_getglobal(L, "OnClientConnection");
GetClientAddr(&ip, &port);
GetServerAddr(&serverip, &serverport);
lua_pushinteger(L, ip);
lua_pushinteger(L, port);
lua_pushinteger(L, serverip);
lua_pushinteger(L, serverport);
if (LuaCallWithTrace(L, 4, 1, NULL) == LUA_OK) {
dropit = lua_toboolean(L, -1);
} else {
LogLuaError("OnClientConnection", lua_tostring(L, -1));
}
lua_pop(L, 1); // pop result or error
AssertLuaStackIsAt(L, 0);
#endif
return dropit;
}
static void LuaOnLogLatency(long reqtime, long contime) {
#ifndef STATIC
lua_State *L = GL;
int n = lua_gettop(L);
lua_getglobal(L, "OnLogLatency");
lua_pushinteger(L, reqtime);
lua_pushinteger(L, contime);
if (LuaCallWithTrace(L, 2, 0, NULL) != LUA_OK) {
LogLuaError("OnLogLatency", lua_tostring(L, -1));
lua_pop(L, 1); // pop error
}
AssertLuaStackIsAt(L, n);
#endif
}
static void LuaOnProcessCreate(int pid) {
#ifndef STATIC
uint32_t ip, serverip;
uint16_t port, serverport;
lua_State *L = GL;
lua_getglobal(L, "OnProcessCreate");
GetClientAddr(&ip, &port);
GetServerAddr(&serverip, &serverport);
lua_pushinteger(L, pid);
lua_pushinteger(L, ip);
lua_pushinteger(L, port);
lua_pushinteger(L, serverip);
lua_pushinteger(L, serverport);
if (LuaCallWithTrace(L, 5, 0, NULL) != LUA_OK) {
LogLuaError("OnProcessCreate", lua_tostring(L, -1));
lua_pop(L, 1); // pop error
}
AssertLuaStackIsAt(L, 0);
#endif
}
static bool LuaOnServerListen(int fd, uint32_t ip, uint16_t port) {
bool nouse = false;
#ifndef STATIC
lua_State *L = GL;
lua_getglobal(L, "OnServerListen");
lua_pushinteger(L, fd);
lua_pushinteger(L, ip);
lua_pushinteger(L, port);
if (LuaCallWithTrace(L, 3, 1, NULL) == LUA_OK) {
nouse = lua_toboolean(L, -1);
} else {
LogLuaError("OnServerListen", lua_tostring(L, -1));
}
lua_pop(L, 1); // pop result or error
AssertLuaStackIsAt(L, 0);
#endif
return nouse;
}
static void LuaOnProcessDestroy(int pid) {
#ifndef STATIC
lua_State *L = GL;
lua_getglobal(L, "OnProcessDestroy");
lua_pushinteger(L, pid);
if (LuaCallWithTrace(L, 1, 0, NULL) != LUA_OK) {
LogLuaError("OnProcessDestroy", lua_tostring(L, -1));
lua_pop(L, 1); // pop error
}
AssertLuaStackIsAt(L, 0);
#endif
}
static inline bool IsHookDefined(const char *s) {
#ifndef STATIC
lua_State *L = GL;
bool res = !!lua_getglobal(L, s);
lua_pop(L, 1);
return res;
#else
return false;
#endif
}
static void CallSimpleHook(const char *s) {
#ifndef STATIC
lua_State *L = GL;
int n = lua_gettop(L);
lua_getglobal(L, s);
if (LuaCallWithTrace(L, 0, 0, NULL) != LUA_OK) {
LogLuaError(s, lua_tostring(L, -1));
lua_pop(L, 1); // pop error
}
AssertLuaStackIsAt(L, n);
#endif
}
static void CallSimpleHookIfDefined(const char *s) {
if (IsHookDefined(s)) {
CallSimpleHook(s);
}
}
static void ReportWorkerExit(int pid, int ws) {
int workers;
workers = atomic_fetch_sub(&shared->workers, 1) - 1;
if (WIFEXITED(ws)) {
if (WEXITSTATUS(ws)) {
LockInc(&shared->c.failedchildren);
WARNF("(stat) %d exited with %d (%,d workers remain)", pid,
WEXITSTATUS(ws), workers);
} else {
DEBUGF("(stat) %d exited (%,d workers remain)", pid, workers);
}
} else {
LockInc(&shared->c.terminatedchildren);
WARNF("(stat) %d terminated with %s (%,d workers remain)", pid,
strsignal(WTERMSIG(ws)), workers);
}
}
static void ReportWorkerResources(int pid, struct rusage *ru) {
char *s, *b = 0;
if (logrusage || LOGGABLE(kLogDebug)) {
AppendResourceReport(&b, ru, "\n");
if (b) {
if ((s = IndentLines(b, appendz(b).i - 1, 0, 1))) {
LOGF(kLogDebug, "(stat) resource report for pid %d\n%s", pid, s);
free(s);
}
free(b);
}
}
}
static void HandleWorkerExit(int pid, int ws, struct rusage *ru) {
LockInc(&shared->c.connectionshandled);
rusage_add(&shared->children, ru);
ReportWorkerExit(pid, ws);
ReportWorkerResources(pid, ru);
if (hasonprocessdestroy) {
LuaOnProcessDestroy(pid);
}
}
static void KillGroupImpl(int sig) {
LOGIFNEG1(kill(0, sig));
}
static void KillGroup(void) {
KillGroupImpl(SIGTERM);
}
static void WaitAll(void) {
int ws, pid;
struct rusage ru;
for (;;) {
if ((pid = wait4(-1, &ws, 0, &ru)) != -1) {
HandleWorkerExit(pid, ws, &ru);
} else {
if (errno == ECHILD) {
errno = 0;
break;
}
if (errno == EINTR) {
if (killed) {
killed = false;
terminated = false;
WARNF("(srvr) server shall terminate harder");
KillGroup();
}
errno = 0;
continue;
}
DIEF("(srvr) wait error: %m");
}
}
}
static void ReapZombies(void) {
int ws, pid;
struct rusage ru;
do {
zombied = false;
if ((pid = wait4(-1, &ws, WNOHANG, &ru)) != -1) {
if (pid) {
HandleWorkerExit(pid, ws, &ru);
} else {
break;
}
} else {
if (errno == ECHILD) {
errno = 0;
break;
}
if (errno == EINTR) {
errno = 0;
continue;
}
DIEF("(srvr) wait error: %m");
}
} while (!terminated);
}
static ssize_t ReadAll(int fd, char *p, size_t n) {
ssize_t rc;
size_t i, got;
for (i = 0; i < n;) {
rc = READ(fd, p + i, n - i);
if (rc != -1) {
got = rc;
i += got;
} else if (errno != EINTR) {
WARNF("(file) read error: %m");
return -1;
}
}
return i;
}
static bool IsTakingTooLong(void) {
return meltdown && timespec_cmp(timespec_sub(timespec_real(), startread),
(struct timespec){2}) >= 0;
}
static ssize_t WritevAll(int fd, struct iovec *iov, int iovlen) {
int i;
ssize_t rc;
size_t wrote, total;
i = 0;
total = 0;
do {
if (i) {
while (i < iovlen && !iov[i].iov_len) ++i;
if (i == iovlen) break;
}
if ((rc = writev(fd, iov + i, iovlen - i)) != -1) {
wrote = rc;
total += wrote;
do {
if (wrote >= iov[i].iov_len) {
wrote -= iov[i++].iov_len;
} else {
iov[i].iov_base = (char *)iov[i].iov_base + wrote;
iov[i].iov_len -= wrote;
wrote = 0;
}
} while (wrote);
} else if (errno == EINTR) {
errno = 0;
LockInc(&shared->c.writeinterruputs);
if (killed || IsTakingTooLong()) {
return total ? total : -1;
}
} else {
return total ? total : -1;
}
} while (i < iovlen);
return total;
}
static int TlsFlush(struct TlsBio *bio, const unsigned char *buf, size_t len) {
struct iovec v[2];
if (len || bio->c > 0) {
v[0].iov_base = bio->u;
v[0].iov_len = MAX(0, bio->c);
v[1].iov_base = (void *)buf;
v[1].iov_len = len;
if (WritevAll(bio->fd, v, 2) != -1) {
if (bio->c > 0) bio->c = 0;
} else if (errno == EINTR) {
errno = 0;
return MBEDTLS_ERR_NET_CONN_RESET;
} else if (errno == EAGAIN) {
errno = 0;
return MBEDTLS_ERR_SSL_TIMEOUT;
} else if (errno == EPIPE || errno == ECONNRESET || errno == ENETRESET) {
return MBEDTLS_ERR_NET_CONN_RESET;
} else {
WARNF("(ssl) TlsSend error: %m");
return MBEDTLS_ERR_NET_SEND_FAILED;
}
}
return 0;
}
static int TlsSend(void *ctx, const unsigned char *buf, size_t len) {
int rc;
struct TlsBio *bio = ctx;
if (bio->c >= 0 && bio->c + len <= sizeof(bio->u)) {
memcpy(bio->u + bio->c, buf, len);
bio->c += len;
return len;
}
if ((rc = TlsFlush(bio, buf, len)) < 0) return rc;
return len;
}
static int TlsRecvImpl(void *ctx, unsigned char *p, size_t n, uint32_t o) {
int r;
struct iovec v[2];
struct TlsBio *bio = ctx;
if ((r = TlsFlush(bio, 0, 0)) < 0) return r;
if (bio->a < bio->b) {
r = MIN(n, bio->b - bio->a);
memcpy(p, bio->t + bio->a, r);
if ((bio->a += r) == bio->b) bio->a = bio->b = 0;
return r;
}
v[0].iov_base = p;
v[0].iov_len = n;
v[1].iov_base = bio->t;
v[1].iov_len = sizeof(bio->t);
while ((r = readv(bio->fd, v, 2)) == -1) {
if (errno == EINTR) {
errno = 0;
return MBEDTLS_ERR_SSL_WANT_READ;
} else if (errno == EAGAIN) {
errno = 0;
return MBEDTLS_ERR_SSL_TIMEOUT;
} else if (errno == EPIPE || errno == ECONNRESET || errno == ENETRESET) {
return MBEDTLS_ERR_NET_CONN_RESET;
} else {
WARNF("(ssl) tls read() error: %m");
return MBEDTLS_ERR_NET_RECV_FAILED;
}
}
if (r > n) bio->b = r - n;
return MIN(n, r);
}
static int TlsRecv(void *ctx, unsigned char *buf, size_t len, uint32_t tmo) {
int rc;
if (oldin.n) {
rc = MIN(oldin.n, len);
memcpy(buf, oldin.p, rc);
oldin.p += rc;
oldin.n -= rc;
return rc;
}
return TlsRecvImpl(ctx, buf, len, tmo);
}
static ssize_t SslRead(int fd, void *buf, size_t size) {
int rc;
rc = mbedtls_ssl_read(&ssl, buf, size);
if (!rc) {
errno = ECONNRESET;
rc = -1;
} else if (rc < 0) {
if (rc == MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY) {
rc = 0;
} else if (rc == MBEDTLS_ERR_NET_CONN_RESET ||
rc == MBEDTLS_ERR_SSL_TIMEOUT) {
errno = ECONNRESET;
rc = -1;
} else if (rc == MBEDTLS_ERR_SSL_WANT_READ) {
errno = EINTR;
rc = -1;
errno = 0;
} else if (rc == MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE) {
WARNF("(ssl) %s SslRead error -0x%04x (%s)", DescribeClient(), -rc,
"fatal alert message");
errno = EIO;
rc = -1;
} else if (rc == MBEDTLS_ERR_SSL_INVALID_RECORD) {
WARNF("(ssl) %s SslRead error -0x%04x (%s)", DescribeClient(), -rc,
"invalid record");
errno = EIO;
rc = -1;
} else if (rc == MBEDTLS_ERR_SSL_INVALID_MAC) {
WARNF("(ssl) %s SslRead error -0x%04x (%s)", DescribeClient(), -rc,
"hmac verification failed");
errno = EIO;
rc = -1;
} else {
WARNF("(ssl) %s SslRead error -0x%04x", DescribeClient(), -rc);
errno = EIO;
rc = -1;
}
}
return rc;
}
static ssize_t SslWrite(int fd, struct iovec *iov, int iovlen) {
int i;
size_t n;
ssize_t rc;
const unsigned char *p;
for (i = 0; i < iovlen; ++i) {
p = iov[i].iov_base;
n = iov[i].iov_len;
while (n) {
if ((rc = mbedtls_ssl_write(&ssl, p, n)) > 0) {
p += rc;
n -= rc;
} else if (rc == MBEDTLS_ERR_NET_CONN_RESET) {
errno = ECONNRESET;
return -1;
} else if (rc == MBEDTLS_ERR_SSL_TIMEOUT) {
errno = ETIMEDOUT;
return -1;
} else {
WARNF("(ssl) %s SslWrite error -0x%04x", DescribeClient(), -rc);
errno = EIO;
return -1;
}
}
}
return 0;
}
static void NotifyClose(void) {
#ifndef UNSECURE
if (usingssl) {
DEBUGF("(ssl) SSL notifying close");
mbedtls_ssl_close_notify(&ssl);
}
#endif
}
static void WipeSigningKeys(void) {
size_t i;
if (uniprocess) return;
for (i = 0; i < certs.n; ++i) {
if (!certs.p[i].key) continue;
if (!certs.p[i].cert) continue;
if (!certs.p[i].cert->ca_istrue) continue;
mbedtls_pk_free(certs.p[i].key);
Free(&certs.p[i].key);
}
}
static void PsksDestroy(void) {
size_t i;
for (i = 0; i < psks.n; ++i) {
mbedtls_platform_zeroize(psks.p[i].key, psks.p[i].key_len);
free(psks.p[i].key);
free(psks.p[i].identity);
}
Free(&psks.p);
psks.n = 0;
}
static void CertsDestroy(void) {
size_t i;
// break up certificate chains to prevent double free
for (i = 0; i < certs.n; ++i) {
if (certs.p[i].cert) {
certs.p[i].cert->next = 0;
}
}
for (i = 0; i < certs.n; ++i) {
mbedtls_x509_crt_free(certs.p[i].cert);
free(certs.p[i].cert);
mbedtls_pk_free(certs.p[i].key);
free(certs.p[i].key);
}
Free(&certs.p);
certs.n = 0;
}
static void WipeServingKeys(void) {
if (uniprocess) return;
mbedtls_ssl_ticket_free(&ssltick);
mbedtls_ssl_key_cert_free(conf.key_cert), conf.key_cert = 0;
CertsDestroy();
PsksDestroy();
}
static bool CertHasCommonName(const mbedtls_x509_crt *cert, const void *s,
size_t n) {
const mbedtls_x509_name *name;
for (name = &cert->subject; name; name = name->next) {
if (!MBEDTLS_OID_CMP(MBEDTLS_OID_AT_CN, &name->oid)) {
if (SlicesEqualCase(s, n, name->val.p, name->val.len)) {
return true;
}
break;
}
}
return false;
}
static bool TlsRouteFind(mbedtls_pk_type_t type, mbedtls_ssl_context *ssl,
const unsigned char *host, size_t size, int64_t ip) {
int i;
for (i = 0; i < certs.n; ++i) {
if (IsServerCert(certs.p + i, type) &&
(((certs.p[i].cert->ext_types & MBEDTLS_X509_EXT_SUBJECT_ALT_NAME) &&
(ip == -1 ? CertHasHost(certs.p[i].cert, host, size)
: CertHasIp(certs.p[i].cert, ip))) ||
CertHasCommonName(certs.p[i].cert, host, size))) {
CHECK_EQ(
0, mbedtls_ssl_set_hs_own_cert(ssl, certs.p[i].cert, certs.p[i].key));
DEBUGF("(ssl) TlsRoute(%s, %`'.*s) %s %`'s", mbedtls_pk_type_name(type),
size, host, mbedtls_pk_get_name(&certs.p[i].cert->pk),
_gc(FormatX509Name(&certs.p[i].cert->subject)));
return true;
}
}
return false;
}
static bool TlsRouteFirst(mbedtls_pk_type_t type, mbedtls_ssl_context *ssl) {
int i;
for (i = 0; i < certs.n; ++i) {
if (IsServerCert(certs.p + i, type)) {
CHECK_EQ(
0, mbedtls_ssl_set_hs_own_cert(ssl, certs.p[i].cert, certs.p[i].key));
DEBUGF("(ssl) TlsRoute(%s) %s %`'s", mbedtls_pk_type_name(type),
mbedtls_pk_get_name(&certs.p[i].cert->pk),
_gc(FormatX509Name(&certs.p[i].cert->subject)));
return true;
}
}
return false;
}
static int TlsRoute(void *ctx, mbedtls_ssl_context *ssl,
const unsigned char *host, size_t size) {
int64_t ip;
bool ok1, ok2;
ip = ParseIp((const char *)host, size);
ok1 = TlsRouteFind(MBEDTLS_PK_ECKEY, ssl, host, size, ip);
ok2 = TlsRouteFind(MBEDTLS_PK_RSA, ssl, host, size, ip);
if (!ok1 && !ok2) {
WARNF("(ssl) TlsRoute(%`'.*s) not found", size, host);
ok1 = TlsRouteFirst(MBEDTLS_PK_ECKEY, ssl);
ok2 = TlsRouteFirst(MBEDTLS_PK_RSA, ssl);
}
return ok1 || ok2 ? 0 : -1;
}
static int TlsRoutePsk(void *ctx, mbedtls_ssl_context *ssl,
const unsigned char *identity, size_t identity_len) {
size_t i;
for (i = 0; i < psks.n; ++i) {
if (SlicesEqual((void *)identity, identity_len, psks.p[i].identity,
psks.p[i].identity_len)) {
DEBUGF("(ssl) TlsRoutePsk(%`'.*s)", identity_len, identity);
mbedtls_ssl_set_hs_psk(ssl, psks.p[i].key, psks.p[i].key_len);
// keep track of selected psk to report its identity
sslpskindex = i + 1; // use index+1 to check against 0 (when not set)
return 0;
}
}
WARNF("(ssl) TlsRoutePsk(%`'.*s) not found", identity_len, identity);
return -1;
}
static bool TlsSetup(void) {
int r;
oldin.p = inbuf.p;
oldin.n = amtread;
inbuf.p += amtread;
inbuf.n -= amtread;
inbuf.c = amtread;
amtread = 0;
g_bio.fd = client;
g_bio.a = 0;
g_bio.b = 0;
g_bio.c = 0;
sslpskindex = 0;
for (;;) {
if (!(r = mbedtls_ssl_handshake(&ssl)) && TlsFlush(&g_bio, 0, 0) != -1) {
LockInc(&shared->c.sslhandshakes);
g_bio.c = -1;
usingssl = true;
reader = SslRead;
writer = SslWrite;
WipeServingKeys();
VERBOSEF("(ssl) shaken %s %s %s%s %s", DescribeClient(),
mbedtls_ssl_get_ciphersuite(&ssl), mbedtls_ssl_get_version(&ssl),
ssl.session->compression ? " COMPRESSED" : "",
ssl.curve ? ssl.curve->name : "uncurved");
DEBUGF("(ssl) client ciphersuite preference was %s",
_gc(FormatSslClientCiphers(&ssl)));
return true;
} else if (r == MBEDTLS_ERR_SSL_WANT_READ) {
LockInc(&shared->c.handshakeinterrupts);
if (terminated || killed || IsTakingTooLong()) {
return false;
}
} else {
LockInc(&shared->c.sslhandshakefails);
mbedtls_ssl_session_reset(&ssl);
switch (r) {
case MBEDTLS_ERR_SSL_CONN_EOF:
DEBUGF("(ssl) %s SSL handshake EOF", DescribeClient());
return false;
case MBEDTLS_ERR_NET_CONN_RESET:
DEBUGF("(ssl) %s SSL handshake reset", DescribeClient());
return false;
case MBEDTLS_ERR_SSL_TIMEOUT:
LockInc(&shared->c.ssltimeouts);
DEBUGF("(ssl) %s %s", DescribeClient(), "ssltimeouts");
return false;
case MBEDTLS_ERR_SSL_NO_CIPHER_CHOSEN:
LockInc(&shared->c.sslnociphers);
WARNF("(ssl) %s %s %s", DescribeClient(), "sslnociphers",
_gc(FormatSslClientCiphers(&ssl)));
return false;
case MBEDTLS_ERR_SSL_NO_USABLE_CIPHERSUITE:
LockInc(&shared->c.sslcantciphers);
WARNF("(ssl) %s %s %s", DescribeClient(), "sslcantciphers",
_gc(FormatSslClientCiphers(&ssl)));
return false;
case MBEDTLS_ERR_SSL_BAD_HS_PROTOCOL_VERSION:
LockInc(&shared->c.sslnoversion);
WARNF("(ssl) %s %s %s", DescribeClient(), "sslnoversion",
mbedtls_ssl_get_version(&ssl));
return false;
case MBEDTLS_ERR_SSL_INVALID_MAC:
LockInc(&shared->c.sslshakemacs);
WARNF("(ssl) %s %s", DescribeClient(), "sslshakemacs");
return false;
case MBEDTLS_ERR_SSL_NO_CLIENT_CERTIFICATE:
LockInc(&shared->c.sslnoclientcert);
WARNF("(ssl) %s %s", DescribeClient(), "sslnoclientcert");
NotifyClose();
return false;
case MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:
LockInc(&shared->c.sslverifyfailed);
WARNF("(ssl) %s SSL %s", DescribeClient(),
_gc(DescribeSslVerifyFailure(
ssl.session_negotiate->verify_result)));
return false;
case MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE:
switch (ssl.fatal_alert) {
case MBEDTLS_SSL_ALERT_MSG_CERT_UNKNOWN:
LockInc(&shared->c.sslunknowncert);
DEBUGF("(ssl) %s %s", DescribeClient(), "sslunknowncert");
return false;
case MBEDTLS_SSL_ALERT_MSG_UNKNOWN_CA:
LockInc(&shared->c.sslunknownca);
DEBUGF("(ssl) %s %s", DescribeClient(), "sslunknownca");
return false;
default:
WARNF("(ssl) %s SSL shakealert %s", DescribeClient(),
GetAlertDescription(ssl.fatal_alert));
return false;
}
default:
WARNF("(ssl) %s SSL handshake failed -0x%04x", DescribeClient(), -r);
return false;
}
}
}
}
static void ConfigureCertificate(mbedtls_x509write_cert *cw, struct Cert *ca,
int usage, int type) {
int r;
const char *s;
bool isduplicate;
size_t i, j, k, nsan;
struct mbedtls_san *san;
const struct HostsTxt *htxt;
char *name, *subject, *issuer, notbefore[16], notafter[16], hbuf[256];
san = 0;
nsan = 0;
name = 0;
htxt = GetHostsTxt();
strcpy(hbuf, "localhost");
gethostname(hbuf, sizeof(hbuf));
for (i = 0; i < htxt->entries.i; ++i) {
for (j = 0; j < ips.n; ++j) {
if (IsLoopbackIp(ips.p[j])) continue;
if (ips.p[j] == READ32BE(htxt->entries.p[i].ip)) {
isduplicate = false;
s = htxt->strings.p + htxt->entries.p[i].name;
if (!name) name = (void *)s;
for (k = 0; k < nsan; ++k) {
if (san[k].tag == MBEDTLS_X509_SAN_DNS_NAME &&
!strcasecmp(s, san[k].val)) {
isduplicate = true;
break;
}
}
if (!isduplicate) {
san = realloc(san, (nsan += 2) * sizeof(*san));
san[nsan - 2].tag = MBEDTLS_X509_SAN_DNS_NAME;
san[nsan - 2].val = s;
san[nsan - 1].tag = MBEDTLS_X509_SAN_DNS_NAME;
san[nsan - 1].val = _gc(xasprintf("*.%s", s));
}
}
}
}
for (i = 0; i < ips.n; ++i) {
if (IsLoopbackIp(ips.p[i])) continue;
san = realloc(san, ++nsan * sizeof(*san));
san[nsan - 1].tag = MBEDTLS_X509_SAN_IP_ADDRESS;
san[nsan - 1].ip4 = ips.p[i];
}
ChooseCertificateLifetime(notbefore, notafter);
subject = xasprintf("CN=%s", name ? name : hbuf);
if (ca) {
issuer = calloc(1, 1000);
CHECK_GT(mbedtls_x509_dn_gets(issuer, 1000, &ca->cert->subject), 0);
} else {
issuer = strdup(subject);
}
if ((r = mbedtls_x509write_crt_set_subject_alternative_name(cw, san, nsan)) ||
(r = mbedtls_x509write_crt_set_validity(cw, notbefore, notafter)) ||
(r = mbedtls_x509write_crt_set_basic_constraints(cw, false, -1)) ||
#if defined(MBEDTLS_SHA1_C)
(r = mbedtls_x509write_crt_set_subject_key_identifier(cw)) ||
(r = mbedtls_x509write_crt_set_authority_key_identifier(cw)) ||
#endif
(r = mbedtls_x509write_crt_set_key_usage(cw, usage)) ||
(r = mbedtls_x509write_crt_set_ext_key_usage(cw, type)) ||
(r = mbedtls_x509write_crt_set_subject_name(cw, subject)) ||
(r = mbedtls_x509write_crt_set_issuer_name(cw, issuer))) {
FATALF("(ssl) configure certificate (grep -0x%04x)", -r);
}
free(subject);
free(issuer);
free(san);
}
static struct Cert GetKeySigningKey(void) {
size_t i;
for (i = 0; i < certs.n; ++i) {
if (!certs.p[i].key) continue;
if (!certs.p[i].cert) continue;
if (!certs.p[i].cert->ca_istrue) continue;
if (mbedtls_x509_crt_check_key_usage(certs.p[i].cert,
MBEDTLS_X509_KU_KEY_CERT_SIGN)) {
continue;
}
return certs.p[i];
}
return (struct Cert){0};
}
static struct Cert GenerateEcpCertificate(struct Cert *ca) {
mbedtls_pk_context *key;
mbedtls_md_type_t md_alg;
mbedtls_x509write_cert wcert;
md_alg = suiteb ? MBEDTLS_MD_SHA384 : MBEDTLS_MD_SHA256;
key = InitializeKey(ca, &wcert, md_alg, MBEDTLS_PK_ECKEY);
CHECK_EQ(0, mbedtls_ecp_gen_key(
suiteb ? MBEDTLS_ECP_DP_SECP384R1 : MBEDTLS_ECP_DP_SECP256R1,
mbedtls_pk_ec(*key), GenerateHardRandom, 0));
GenerateCertificateSerial(&wcert);
ConfigureCertificate(&wcert, ca, MBEDTLS_X509_KU_DIGITAL_SIGNATURE,
MBEDTLS_X509_NS_CERT_TYPE_SSL_SERVER |
MBEDTLS_X509_NS_CERT_TYPE_SSL_CLIENT);
return FinishCertificate(ca, &wcert, key);
}
static struct Cert GenerateRsaCertificate(struct Cert *ca) {
mbedtls_pk_context *key;
mbedtls_md_type_t md_alg;
mbedtls_x509write_cert wcert;
md_alg = suiteb ? MBEDTLS_MD_SHA384 : MBEDTLS_MD_SHA256;
key = InitializeKey(ca, &wcert, md_alg, MBEDTLS_PK_RSA);
CHECK_EQ(0, mbedtls_rsa_gen_key(mbedtls_pk_rsa(*key), GenerateHardRandom, 0,
suiteb ? 4096 : 2048, 65537));
GenerateCertificateSerial(&wcert);
ConfigureCertificate(
&wcert, ca,
MBEDTLS_X509_KU_DIGITAL_SIGNATURE | MBEDTLS_X509_KU_KEY_ENCIPHERMENT,
MBEDTLS_X509_NS_CERT_TYPE_SSL_SERVER |
MBEDTLS_X509_NS_CERT_TYPE_SSL_CLIENT);
return FinishCertificate(ca, &wcert, key);
}
static void LoadCertificates(void) {
size_t i;
struct Cert ksk, ecp, rsa;
bool havecert, haveclientcert;
havecert = false;
haveclientcert = false;
for (i = 0; i < certs.n; ++i) {
if (certs.p[i].key && certs.p[i].cert && !certs.p[i].cert->ca_istrue &&
!mbedtls_x509_crt_check_key_usage(certs.p[i].cert,
MBEDTLS_X509_KU_DIGITAL_SIGNATURE)) {
if (!mbedtls_x509_crt_check_extended_key_usage(
certs.p[i].cert, MBEDTLS_OID_SERVER_AUTH,
MBEDTLS_OID_SIZE(MBEDTLS_OID_SERVER_AUTH))) {
LogCertificate("using server certificate", certs.p[i].cert);
UseCertificate(&conf, certs.p + i, "server");
havecert = true;
}
if (!mbedtls_x509_crt_check_extended_key_usage(
certs.p[i].cert, MBEDTLS_OID_CLIENT_AUTH,
MBEDTLS_OID_SIZE(MBEDTLS_OID_CLIENT_AUTH))) {
LogCertificate("using client certificate", certs.p[i].cert);
UseCertificate(&confcli, certs.p + i, "client");
haveclientcert = true;
}
}
}
if (!havecert && (!psks.n || ksk.key)) {
if ((ksk = GetKeySigningKey()).key) {
DEBUGF("(ssl) generating ssl certificates using %`'s",
_gc(FormatX509Name(&ksk.cert->subject)));
} else {
VERBOSEF("(ssl) could not find non-CA SSL certificate key pair with"
" -addext keyUsage=digitalSignature"
" -addext extendedKeyUsage=serverAuth");
VERBOSEF("(ssl) could not find CA key signing key pair with"
" -addext keyUsage=keyCertSign");
VERBOSEF("(ssl) generating self-signed ssl certificates");
}
#ifdef MBEDTLS_ECP_C
ecp = GenerateEcpCertificate(ksk.key ? &ksk : 0);
if (!havecert) UseCertificate(&conf, &ecp, "server");
if (!haveclientcert && ksk.key) {
UseCertificate(&confcli, &ecp, "client");
}
AppendCert(ecp.cert, ecp.key);
#endif
#ifdef MBEDTLS_RSA_C
if (!norsagen) {
rsa = GenerateRsaCertificate(ksk.key ? &ksk : 0);
if (!havecert) UseCertificate(&conf, &rsa, "server");
if (!haveclientcert && ksk.key) {
UseCertificate(&confcli, &rsa, "client");
}
AppendCert(rsa.cert, rsa.key);
}
#endif
}
WipeSigningKeys();
}
static bool ClientAcceptsGzip(void) {
return cpm.msg.version >= 10 && /* RFC1945 § 3.5 */
HeaderHas(&cpm.msg, inbuf.p, kHttpAcceptEncoding, "gzip", 4);
}
char *FormatUnixHttpDateTime(char *s, int64_t t) {
struct tm tm;
gmtime_r(&t, &tm);
FormatHttpDateTime(s, &tm);
return s;
}
static void UpdateCurrentDate(struct timespec now) {
int64_t t;
struct tm tm;
t = now.tv_sec;
shared->nowish = now;
gmtime_r(&t, &tm);
FormatHttpDateTime(shared->currentdate, &tm);
}
static int64_t GetGmtOffset(int64_t t) {
struct tm tm;
localtime_r(&t, &tm);
return tm.tm_gmtoff;
}
forceinline bool IsCompressed(struct Asset *a) {
return !a->file &&
ZIP_LFILE_COMPRESSIONMETHOD(zmap + a->lf) == kZipCompressionDeflate;
}
forceinline int GetMode(struct Asset *a) {
return a->file ? a->file->st.st_mode : GetZipCfileMode(zmap + a->cf);
}
forceinline bool IsCompressionMethodSupported(int method) {
return method == kZipCompressionNone || method == kZipCompressionDeflate;
}
static inline unsigned Hash(const void *p, unsigned long n) {
unsigned h, i;
for (h = i = 0; i < n; i++) {
h += ((unsigned char *)p)[i];
h *= 0x9e3779b1;
}
return MAX(1, h);
}
static void FreeAssets(void) {
size_t i;
for (i = 0; i < assets.n; ++i) {
Free(&assets.p[i].lastmodifiedstr);
}
Free(&assets.p);
assets.n = 0;
}
static void FreeStrings(struct Strings *l) {
size_t i;
for (i = 0; i < l->n; ++i) {
Free(&l->p[i].s);
}
Free(&l->p);
l->n = 0;
}
static unsigned long roundup2pow(unsigned long x) {
return x > 1 ? 2ul << _bsrl(x - 1) : x ? 1 : 0;
}
static void IndexAssets(void) {
uint64_t cf;
struct Asset *p;
struct timespec lm;
uint32_t i, n, m, step, hash;
DEBUGF("(zip) indexing assets (inode %#lx)", zst.st_ino);
FreeAssets();
CHECK_GE(HASH_LOAD_FACTOR, 2);
CHECK(READ32LE(zcdir) == kZipCdir64HdrMagic ||
READ32LE(zcdir) == kZipCdirHdrMagic);
n = GetZipCdirRecords(zcdir);
m = roundup2pow(MAX(1, n) * HASH_LOAD_FACTOR);
p = xcalloc(m, sizeof(struct Asset));
for (cf = GetZipCdirOffset(zcdir); n--; cf += ZIP_CFILE_HDRSIZE(zmap + cf)) {
CHECK_EQ(kZipCfileHdrMagic, ZIP_CFILE_MAGIC(zmap + cf));
if (!IsCompressionMethodSupported(ZIP_CFILE_COMPRESSIONMETHOD(zmap + cf))) {
WARNF("(zip) don't understand zip compression method %d used by %`'.*s",
ZIP_CFILE_COMPRESSIONMETHOD(zmap + cf),
ZIP_CFILE_NAMESIZE(zmap + cf), ZIP_CFILE_NAME(zmap + cf));
continue;
}
hash = Hash(ZIP_CFILE_NAME(zmap + cf), ZIP_CFILE_NAMESIZE(zmap + cf));
step = 0;
do {
i = (hash + ((step * (step + 1)) >> 1)) & (m - 1);
++step;
} while (p[i].hash);
GetZipCfileTimestamps(zmap + cf, &lm, 0, 0, gmtoff);
p[i].hash = hash;
p[i].cf = cf;
p[i].lf = GetZipCfileOffset(zmap + cf);
p[i].istext = !!(ZIP_CFILE_INTERNALATTRIBUTES(zmap + cf) & kZipIattrText);
p[i].lastmodified = lm.tv_sec;
p[i].lastmodifiedstr = FormatUnixHttpDateTime(xmalloc(30), lm.tv_sec);
}
assets.p = p;
assets.n = m;
}
static bool OpenZip(bool force) {
int fd;
size_t n;
uint8_t *m, *d;
struct stat st;
if (stat(zpath, &st) != -1) {
if (force || st.st_ino != zst.st_ino || st.st_size > zst.st_size) {
if (st.st_ino == zst.st_ino) {
fd = zfd;
} else if ((fd = open(zpath, O_RDWR)) == -1) {
WARNF("(zip) open() error: %m");
return false;
}
if ((m = mmap(0, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0)) !=
MAP_FAILED) {
n = st.st_size;
if ((d = GetZipEocd(m, n, 0))) {
if (zmap) {
LOGIFNEG1(munmap(zmap, zsize));
}
zmap = m;
zsize = n;
zcdir = d;
DCHECK(IsZipEocd32(zmap, zsize, zcdir - zmap) == kZipOk ||
IsZipEocd64(zmap, zsize, zcdir - zmap) == kZipOk);
memcpy(&zst, &st, sizeof(st));
IndexAssets();
return true;
} else {
WARNF("(zip) couldn't locate central directory");
}
} else {
WARNF("(zip) mmap() error: %m");
}
}
} else {
// avoid noise if we setuid to user who can't see executable
if (errno == EACCES) {
VERBOSEF("(zip) stat(%`'s) error: %m", zpath);
} else {
WARNF("(zip) stat(%`'s) error: %m", zpath);
}
}
return false;
}
static struct Asset *GetAssetZip(const char *path, size_t pathlen) {
uint32_t i, step, hash;
if (pathlen > 1 && path[0] == '/') ++path, --pathlen;
hash = Hash(path, pathlen);
for (step = 0;; ++step) {
i = (hash + ((step * (step + 1)) >> 1)) & (assets.n - 1);
if (!assets.p[i].hash) return NULL;
if (hash == assets.p[i].hash &&
pathlen == ZIP_CFILE_NAMESIZE(zmap + assets.p[i].cf) &&
memcmp(path, ZIP_CFILE_NAME(zmap + assets.p[i].cf), pathlen) == 0) {
return &assets.p[i];
}
}
}
static struct Asset *GetAssetFile(const char *path, size_t pathlen) {
size_t i;
struct Asset *a;
if (stagedirs.n) {
a = FreeLater(xcalloc(1, sizeof(struct Asset)));
a->file = FreeLater(xmalloc(sizeof(struct File)));
for (i = 0; i < stagedirs.n; ++i) {
LockInc(&shared->c.stats);
a->file->path.s = FreeLater(MergePaths(stagedirs.p[i].s, stagedirs.p[i].n,
path, pathlen, &a->file->path.n));
if (stat(a->file->path.s, &a->file->st) != -1) {
a->lastmodifiedstr = FormatUnixHttpDateTime(
FreeLater(xmalloc(30)),
(a->lastmodified = a->file->st.st_mtim.tv_sec));
return a;
} else {
LockInc(&shared->c.statfails);
}
}
}
return NULL;
}
static struct Asset *GetAsset(const char *path, size_t pathlen) {
struct Asset *a;
if (!(a = GetAssetFile(path, pathlen))) {
if (!(a = GetAssetZip(path, pathlen))) {
if (pathlen > 1 && path[pathlen - 1] != '/' &&
pathlen + 1 <= sizeof(slashpath)) {
memcpy(mempcpy(slashpath, path, pathlen), "/", 1);
a = GetAssetZip(slashpath, pathlen + 1);
}
}
}
return a;
}
static char *AppendHeader(char *p, const char *k, const char *v) {
if (!v) return p;
return AppendCrlf(stpcpy(stpcpy(stpcpy(p, k), ": "), v));
}
static char *AppendContentType(char *p, const char *ct) {
p = stpcpy(p, "Content-Type: ");
p = stpcpy(p, ct);
if ((cpm.istext = startswith(ct, "text/"))) {
if (!strchr(ct + 5, ';')) {
p = stpcpy(p, "; charset=utf-8");
}
if (!cpm.referrerpolicy && startswith(ct + 5, "html")) {
cpm.referrerpolicy = "no-referrer-when-downgrade";
}
}
cpm.hascontenttype = true;
return AppendCrlf(p);
}
static char *AppendExpires(char *p, int64_t t) {
struct tm tm;
gmtime_r(&t, &tm);
p = stpcpy(p, "Expires: ");
p = FormatHttpDateTime(p, &tm);
return AppendCrlf(p);
}
static char *AppendCache(char *p, int64_t seconds, char *directive) {
if (seconds < 0) return p;
p = stpcpy(p, "Cache-Control: max-age=");
p = FormatUint64(p, seconds);
if (!seconds) {
p = stpcpy(p, ", no-store");
} else if (directive && *directive) {
p = stpcpy(p, ", ");
p = stpcpy(p, directive);
}
p = AppendCrlf(p);
return AppendExpires(p, shared->nowish.tv_sec + seconds);
}
static inline char *AppendContentLength(char *p, size_t n) {
p = stpcpy(p, "Content-Length: ");
p = FormatUint64(p, n);
return AppendCrlf(p);
}
static char *AppendContentRange(char *p, long a, long b, long c) {
p = stpcpy(p, "Content-Range: bytes ");
if (a >= 0 && b > 0) {
p = FormatUint64(p, a);
*p++ = '-';
p = FormatUint64(p, a + b - 1);
} else {
*p++ = '*';
}
*p++ = '/';
p = FormatUint64(p, c);
return AppendCrlf(p);
}
static bool Inflate(void *dp, size_t dn, const void *sp, size_t sn) {
LockInc(&shared->c.inflates);
return !__inflate(dp, dn, sp, sn);
}
static bool Verify(void *data, size_t size, uint32_t crc) {
uint32_t got;
LockInc(&shared->c.verifies);
if (crc == (got = crc32_z(0, data, size))) {
return true;
} else {
LockInc(&shared->c.thiscorruption);
WARNF("(zip) corrupt zip file at %`'.*s had crc 0x%08x but expected 0x%08x",
cpm.msg.uri.b - cpm.msg.uri.a, inbuf.p + cpm.msg.uri.a, got, crc);
return false;
}
}
static void *Deflate(const void *data, size_t size, size_t *out_size) {
void *res;
z_stream zs = {0};
LockInc(&shared->c.deflates);
CHECK_EQ(Z_OK, deflateInit2(&zs, 4, Z_DEFLATED, -MAX_WBITS, DEF_MEM_LEVEL,
Z_DEFAULT_STRATEGY));
zs.next_in = data;
zs.avail_in = size;
zs.avail_out = compressBound(size);
zs.next_out = res = xmalloc(zs.avail_out);
CHECK_EQ(Z_STREAM_END, deflate(&zs, Z_FINISH));
CHECK_EQ(Z_OK, deflateEnd(&zs));
*out_size = zs.total_out;
return xrealloc(res, zs.total_out);
}
static void *LoadAsset(struct Asset *a, size_t *out_size) {
size_t size;
uint8_t *data;
if (S_ISDIR(GetMode(a))) {
WARNF("(srvr) can't load directory");
return NULL;
}
if (!a->file) {
size = GetZipLfileUncompressedSize(zmap + a->lf);
if (size == SIZE_MAX || !(data = malloc(size + 1))) return NULL;
if (IsCompressed(a)) {
if (!Inflate(data, size, ZIP_LFILE_CONTENT(zmap + a->lf),
GetZipCfileCompressedSize(zmap + a->cf))) {
free(data);
return NULL;
}
} else {
memcpy(data, ZIP_LFILE_CONTENT(zmap + a->lf), size);
}
if (!Verify(data, size, ZIP_LFILE_CRC32(zmap + a->lf))) {
free(data);
return NULL;
}
data[size] = '\0';
if (out_size) *out_size = size;
return data;
} else {
LockInc(&shared->c.slurps);
return xslurp(a->file->path.s, out_size);
}
}
static wontreturn void PrintUsage(int fd, int rc) {
size_t n;
const char *p;
struct Asset *a;
if (!(a = GetAssetZip("/help.txt", 9)) || !(p = LoadAsset(a, &n))) {
fprintf(stderr, "error: /help.txt is not a zip asset\n");
exit(1);
}
if (IsTiny()) {
write(fd, p, strlen(p));
} else {
__paginate(fd, p);
}
exit(rc);
}
static void AppendLogo(void) {
size_t n;
char *p, *q;
struct Asset *a;
if ((a = GetAsset("/redbean.png", 12)) && (p = LoadAsset(a, &n))) {
if ((q = EncodeBase64(p, n, &n))) {
appends(&cpm.outbuf, "![\"[logo]\"](\"data:image/png;base64,");)
\r\n");
free(q);
}
free(p);
}
}
static ssize_t Send(struct iovec *iov, int iovlen) {
ssize_t rc;
if ((rc = writer(client, iov, iovlen)) == -1) {
if (errno == ECONNRESET) {
LockInc(&shared->c.writeresets);
DEBUGF("(rsp) %s write reset", DescribeClient());
} else if (errno == EAGAIN) {
LockInc(&shared->c.writetimeouts);
WARNF("(rsp) %s write timeout", DescribeClient());
errno = 0;
} else {
LockInc(&shared->c.writeerrors);
if (errno == EBADF) { // don't warn on close/bad fd
DEBUGF("(rsp) %s write badf", DescribeClient());
} else {
WARNF("(rsp) %s write error: %m", DescribeClient());
}
}
connectionclose = true;
}
return rc;
}
static bool IsSslCompressed(void) {
return usingssl && ssl.session->compression;
}
static char *CommitOutput(char *p) {
uint32_t crc;
size_t outbuflen;
if (!cpm.contentlength) {
outbuflen = appendz(cpm.outbuf).i;
if (cpm.istext && !cpm.isyielding && outbuflen >= 100) {
if (!IsTiny() && !IsSslCompressed()) {
p = stpcpy(p, "Vary: Accept-Encoding\r\n");
}
if (!IsTiny() && //
!IsSslCompressed() && //
ClientAcceptsGzip() && //
!ShouldAvoidGzip()) {
cpm.gzipped = outbuflen;
crc = crc32_z(0, cpm.outbuf, outbuflen);
WRITE32LE(gzip_footer + 0, crc);
WRITE32LE(gzip_footer + 4, outbuflen);
cpm.content =
FreeLater(Deflate(cpm.outbuf, outbuflen, &cpm.contentlength));
DropOutput();
} else {
UseOutput();
}
} else {
UseOutput();
}
} else {
DropOutput();
}
return p;
}
static char *ServeDefaultErrorPage(char *p, unsigned code, const char *reason,
const char *details) {
p = AppendContentType(p, "text/html; charset=ISO-8859-1");
reason = FreeLater(EscapeHtml(reason, -1, 0));
appends(&cpm.outbuf, "\
\r\n\
");
appendf(&cpm.outbuf, "%d %s", code, reason);
appends(&cpm.outbuf, "\
\r\n\
\r\n\
\r\n");
AppendLogo();
appendf(&cpm.outbuf, "%d %s\r\n", code, reason);
appends(&cpm.outbuf, "
\r\n");
if (details) {
appendf(&cpm.outbuf, "%s
\r\n",
FreeLater(EscapeHtml(details, -1, 0)));
}
UseOutput();
return p;
}
static char *ServeErrorImpl(unsigned code, const char *reason,
const char *details) {
size_t n;
char *p, *s;
struct Asset *a;
LockInc(&shared->c.errors);
DropOutput();
p = SetStatus(code, reason);
s = xasprintf("/%d.html", code);
a = GetAsset(s, strlen(s));
free(s);
if (!a) {
return ServeDefaultErrorPage(p, code, reason, details);
} else if (a->file) {
LockInc(&shared->c.slurps);
cpm.content = FreeLater(xslurp(a->file->path.s, &cpm.contentlength));
return AppendContentType(p, "text/html; charset=utf-8");
} else {
cpm.content = (char *)ZIP_LFILE_CONTENT(zmap + a->lf);
cpm.contentlength = GetZipCfileCompressedSize(zmap + a->cf);
if (IsCompressed(a)) {
n = GetZipLfileUncompressedSize(zmap + a->lf);
if ((s = FreeLater(malloc(n))) &&
Inflate(s, n, cpm.content, cpm.contentlength)) {
cpm.content = s;
cpm.contentlength = n;
} else {
return ServeDefaultErrorPage(p, code, reason, details);
}
}
if (Verify(cpm.content, cpm.contentlength, ZIP_LFILE_CRC32(zmap + a->lf))) {
return AppendContentType(p, "text/html; charset=utf-8");
} else {
return ServeDefaultErrorPage(p, code, reason, details);
}
}
}
static char *ServeErrorWithPath(unsigned code, const char *reason,
const char *path, size_t pathlen) {
ERRORF("(srvr) server error: %d %s %`'.*s", code, reason, pathlen, path);
return ServeErrorImpl(code, reason, NULL);
}
static char *ServeErrorWithDetail(unsigned code, const char *reason,
const char *details) {
ERRORF("(srvr) server error: %d %s", code, reason);
return ServeErrorImpl(code, reason, details);
}
static char *ServeError(unsigned code, const char *reason) {
return ServeErrorWithDetail(code, reason, NULL);
}
static char *ServeFailure(unsigned code, const char *reason) {
ERRORF("(srvr) failure: %d %s %s HTTP%02d %.*s %`'.*s %`'.*s %`'.*s %`'.*s",
code, reason, DescribeClient(), cpm.msg.version,
cpm.msg.xmethod.b - cpm.msg.xmethod.a, inbuf.p + cpm.msg.xmethod.a,
HeaderLength(kHttpHost), HeaderData(kHttpHost),
cpm.msg.uri.b - cpm.msg.uri.a, inbuf.p + cpm.msg.uri.a,
HeaderLength(kHttpReferer), HeaderData(kHttpReferer),
HeaderLength(kHttpUserAgent), HeaderData(kHttpUserAgent));
return ServeErrorImpl(code, reason, NULL);
}
static ssize_t YieldGenerator(struct iovec v[3]) {
int nresults, status;
if (cpm.isyielding > 1) {
do {
if (!YL || lua_status(YL) != LUA_YIELD) return 0; // done yielding
cpm.contentlength = 0;
status = lua_resume(YL, NULL, 0, &nresults);
if (status != LUA_OK && status != LUA_YIELD) {
LogLuaError("resume", lua_tostring(YL, -1));
lua_pop(YL, 1);
return -1;
}
lua_pop(YL, nresults);
if (!cpm.contentlength) UseOutput();
// continue yielding if nothing to return to keep generator running
} while (!cpm.contentlength);
}
DEBUGF("(lua) yielded with %ld bytes generated", cpm.contentlength);
cpm.isyielding++;
v[0].iov_base = cpm.content;
v[0].iov_len = cpm.contentlength;
return cpm.contentlength;
}
static void OnLuaServerPageCtrlc(int i) {
lua_sigint(GL, i);
}
static int LuaCallWithYield(lua_State *L) {
int status;
// since yield may happen in OnHttpRequest and in ServeLua,
// need to fully restart the yield generator;
// the second set of headers is not going to be sent
struct sigaction sa, saold;
lua_State *co = lua_newthread(L);
if (__ttyconf.replmode) {
sa.sa_flags = SA_RESETHAND;
sa.sa_handler = OnLuaServerPageCtrlc;
sigemptyset(&sa.sa_mask);
sigaction(SIGINT, &sa, &saold);
}
status = LuaCallWithTrace(L, 0, 0, co);
if (__ttyconf.replmode) {
sigaction(SIGINT, &saold, 0);
}
if (status == LUA_YIELD) {
CHECK_GT(lua_gettop(L), 0); // make sure that coroutine is anchored
YL = co;
cpm.generator = YieldGenerator;
if (!cpm.isyielding) cpm.isyielding = 1;
status = LUA_OK;
}
return status;
}
static ssize_t DeflateGenerator(struct iovec v[3]) {
int i, rc;
size_t no;
i = 0;
if (!dg.t) {
v[0].iov_base = (void *)kGzipHeader;
v[0].iov_len = sizeof(kGzipHeader);
++dg.t;
++i;
} else if (dg.t == 3) {
return 0;
}
if (dg.t != 2) {
CHECK_EQ(0, dg.s.avail_in);
dg.s.next_in = (void *)(cpm.content + dg.i);
dg.s.avail_in = MIN(dg.z, cpm.contentlength - dg.i);
dg.c = crc32_z(dg.c, dg.s.next_in, dg.s.avail_in);
dg.i += dg.s.avail_in;
}
dg.s.next_out = dg.b;
dg.s.avail_out = dg.z;
no = dg.s.avail_in;
rc = deflate(&dg.s, dg.i < cpm.contentlength ? Z_SYNC_FLUSH : Z_FINISH);
if (rc != Z_OK && rc != Z_STREAM_END) {
DIEF("(zip) deflate()→%d oldin:%,zu/%,zu in:%,zu/%,zu out:%,zu/%,zu", rc,
no, dg.z, dg.s.avail_in, dg.z, dg.s.avail_out, dg.z);
} else {
NOISEF("(zip) deflate()→%d oldin:%,zu/%,zu in:%,zu/%,zu out:%,zu/%,zu", rc,
no, dg.z, dg.s.avail_in, dg.z, dg.s.avail_out, dg.z);
}
no = dg.z - dg.s.avail_out;
if (no) {
v[i].iov_base = dg.b;
v[i].iov_len = no;
++i;
}
if (rc == Z_OK) {
CHECK_GT(no, 0);
if (dg.s.avail_out) {
dg.t = 1;
} else {
dg.t = 2;
}
} else if (rc == Z_STREAM_END) {
CHECK_EQ(cpm.contentlength, dg.i);
CHECK_EQ(Z_OK, deflateEnd(&dg.s));
WRITE32LE(gzip_footer + 0, dg.c);
WRITE32LE(gzip_footer + 4, cpm.contentlength);
v[i].iov_base = gzip_footer;
v[i].iov_len = sizeof(gzip_footer);
dg.t = 3;
}
return v[0].iov_len + v[1].iov_len + v[2].iov_len;
}
static char *ServeAssetCompressed(struct Asset *a) {
char *p;
LockInc(&shared->c.deflates);
LockInc(&shared->c.compressedresponses);
DEBUGF("(srvr) ServeAssetCompressed()");
dg.t = 0;
dg.i = 0;
dg.c = 0;
if (usingssl) {
dg.z = 512 + (_rand64() & 1023);
} else {
dg.z = 65536;
}
cpm.gzipped = -1; // signal generator usage with the exact size unknown
cpm.generator = DeflateGenerator;
bzero(&dg.s, sizeof(dg.s));
CHECK_EQ(Z_OK, deflateInit2(&dg.s, 4, Z_DEFLATED, -MAX_WBITS, DEF_MEM_LEVEL,
Z_DEFAULT_STRATEGY));
dg.b = FreeLater(malloc(dg.z));
p = SetStatus(200, "OK");
p = stpcpy(p, "Content-Encoding: gzip\r\n");
return p;
}
static ssize_t InflateGenerator(struct iovec v[3]) {
int i, rc;
size_t no;
i = 0;
if (!dg.t) {
++dg.t;
} else if (dg.t == 3) {
return 0;
}
if (dg.t != 2) {
CHECK_EQ(0, dg.s.avail_in);
dg.s.next_in = (void *)(cpm.content + dg.i);
dg.s.avail_in = MIN(dg.z, cpm.contentlength - dg.i);
dg.i += dg.s.avail_in;
}
dg.s.next_out = dg.b;
dg.s.avail_out = dg.z;
rc = inflate(&dg.s, Z_NO_FLUSH);
if (rc != Z_OK && rc != Z_STREAM_END) DIEF("(zip) inflate()→%d", rc);
no = dg.z - dg.s.avail_out;
if (no) {
v[i].iov_base = dg.b;
v[i].iov_len = no;
dg.c = crc32_z(dg.c, dg.b, no);
++i;
}
if (rc == Z_OK) {
CHECK_GT(no, 0);
dg.t = dg.s.avail_out ? 1 : 2;
} else if (rc == Z_STREAM_END) {
CHECK_EQ(Z_OK, inflateEnd(&dg.s));
CHECK_EQ(ZIP_CFILE_CRC32(zmap + dg.a->cf), dg.c);
dg.t = 3;
}
return v[0].iov_len + v[1].iov_len + v[2].iov_len;
}
static char *ServeAssetDecompressed(struct Asset *a) {
char *p;
size_t size;
LockInc(&shared->c.inflates);
LockInc(&shared->c.decompressedresponses);
size = GetZipCfileUncompressedSize(zmap + a->cf);
DEBUGF("(srvr) ServeAssetDecompressed(%ld)→%ld", cpm.contentlength, size);
if (cpm.msg.method == kHttpHead) {
cpm.content = 0;
cpm.contentlength = size;
return SetStatus(200, "OK");
} else if (!IsTiny()) {
dg.t = 0;
dg.i = 0;
dg.c = 0;
dg.a = a;
dg.z = 65536;
CHECK_EQ(Z_OK, inflateInit2(&dg.s, -MAX_WBITS));
cpm.generator = InflateGenerator;
dg.b = FreeLater(malloc(dg.z));
return SetStatus(200, "OK");
} else if ((p = FreeLater(malloc(size))) &&
Inflate(p, size, cpm.content, cpm.contentlength) &&
Verify(p, size, ZIP_CFILE_CRC32(zmap + a->cf))) {
cpm.content = p;
cpm.contentlength = size;
return SetStatus(200, "OK");
} else {
return ServeError(500, "Internal Server Error");
}
}
static inline char *ServeAssetIdentity(struct Asset *a, const char *ct) {
LockInc(&shared->c.identityresponses);
DEBUGF("(srvr) ServeAssetIdentity(%`'s)", ct);
return SetStatus(200, "OK");
}
static inline char *ServeAssetPrecompressed(struct Asset *a) {
size_t size;
uint32_t crc;
DEBUGF("(srvr) ServeAssetPrecompressed()");
LockInc(&shared->c.precompressedresponses);
crc = ZIP_CFILE_CRC32(zmap + a->cf);
size = GetZipCfileUncompressedSize(zmap + a->cf);
cpm.gzipped = size;
WRITE32LE(gzip_footer + 0, crc);
WRITE32LE(gzip_footer + 4, size);
return SetStatus(200, "OK");
}
static char *ServeAssetRange(struct Asset *a) {
char *p;
long rangestart, rangelength;
DEBUGF("(srvr) ServeAssetRange()");
if (ParseHttpRange(HeaderData(kHttpRange), HeaderLength(kHttpRange),
cpm.contentlength, &rangestart, &rangelength) &&
rangestart >= 0 && rangelength >= 0 && rangestart < cpm.contentlength &&
rangestart + rangelength <= cpm.contentlength) {
LockInc(&shared->c.partialresponses);
p = SetStatus(206, "Partial Content");
p = AppendContentRange(p, rangestart, rangelength, cpm.contentlength);
cpm.content += rangestart;
cpm.contentlength = rangelength;
return p;
} else {
LockInc(&shared->c.badranges);
WARNF("(client) bad range %`'.*s", HeaderLength(kHttpRange),
HeaderData(kHttpRange));
p = SetStatus(416, "Range Not Satisfiable");
p = AppendContentRange(p, -1, -1, cpm.contentlength);
cpm.content = "";
cpm.contentlength = 0;
return p;
}
}
static char *GetAssetPath(uint8_t *zcf, size_t *out_size) {
char *p2;
size_t n1, n2;
const char *p1;
p1 = ZIP_CFILE_NAME(zcf);
n1 = ZIP_CFILE_NAMESIZE(zcf);
n2 = 1 + n1 + 1;
p2 = xmalloc(n2);
p2[0] = '/';
memcpy(p2 + 1, p1, n1);
p2[1 + n1] = '\0';
if (out_size) *out_size = 1 + n1;
return p2;
}
static bool IsHiddenPath(const char *s, size_t n) {
size_t i;
for (i = 0; i < hidepaths.n; ++i) {
if (n >= hidepaths.p[i].n &&
!memcmp(s, hidepaths.p[i].s, hidepaths.p[i].n)) {
return true;
}
}
return false;
}
static char *GetBasicAuthorization(size_t *z) {
size_t n;
const char *p, *q;
struct HttpSlice *g;
g = cpm.msg.headers + (HasHeader(kHttpProxyAuthorization)
? kHttpProxyAuthorization
: kHttpAuthorization);
p = inbuf.p + g->a;
n = g->b - g->a;
if ((q = memchr(p, ' ', n)) && SlicesEqualCase(p, q - p, "Basic", 5)) {
return DecodeBase64(q + 1, n - (q + 1 - p), z);
} else {
return NULL;
}
}
static const char *GetSystemUrlLauncherCommand(void) {
if (IsWindows()) {
return "explorer.exe";
} else if (IsXnu()) {
return "open";
} else {
return "xdg-open";
}
}
static void LaunchBrowser(const char *path) {
int pid, ws;
struct in_addr addr;
const char *u, *prog;
sigset_t chldmask, savemask;
struct sigaction ignore, saveint, savequit;
uint16_t port = 80;
path = firstnonnull(path, "/");
// use the first server address if there is at least one server
if (servers.n) {
addr = servers.p[0].addr.sin_addr;
port = ntohs(servers.p[0].addr.sin_port);
}
// assign a loopback address if no server or unknown server address
if (!servers.n || !addr.s_addr) addr.s_addr = htonl(INADDR_LOOPBACK);
if (*path != '/') path = _gc(xasprintf("/%s", path));
if ((prog = commandv(GetSystemUrlLauncherCommand(), _gc(malloc(PATH_MAX)),
PATH_MAX))) {
u = _gc(xasprintf("http://%s:%d%s", inet_ntoa(addr), port, path));
DEBUGF("(srvr) opening browser with command %`'s %s", prog, u);
ignore.sa_flags = 0;
ignore.sa_handler = SIG_IGN;
sigemptyset(&ignore.sa_mask);
sigaction(SIGINT, &ignore, &saveint);
sigaction(SIGQUIT, &ignore, &savequit);
sigemptyset(&chldmask);
sigaddset(&chldmask, SIGCHLD);
sigprocmask(SIG_BLOCK, &chldmask, &savemask);
CHECK_NE(-1, (pid = fork()));
if (!pid) {
setpgrp(); // ctrl-c'ing redbean shouldn't kill browser
sigaction(SIGINT, &saveint, 0);
sigaction(SIGQUIT, &savequit, 0);
sigprocmask(SIG_SETMASK, &savemask, 0);
execv(prog, (char *const[]){(char *)prog, (char *)u, 0});
_Exit(127);
}
while (wait4(pid, &ws, 0, 0) == -1) {
CHECK_EQ(EINTR, errno);
errno = 0;
}
sigaction(SIGINT, &saveint, 0);
sigaction(SIGQUIT, &savequit, 0);
sigprocmask(SIG_SETMASK, &savemask, 0);
if (!(WIFEXITED(ws) && WEXITSTATUS(ws) == 0)) {
WARNF("(srvr) command %`'s exited with %d", GetSystemUrlLauncherCommand(),
WIFEXITED(ws) ? WEXITSTATUS(ws) : 128 + WEXITSTATUS(ws));
}
} else {
WARNF("(srvr) can't launch browser because %`'s isn't installed",
GetSystemUrlLauncherCommand());
}
}
static char *BadMethod(void) {
LockInc(&shared->c.badmethods);
return stpcpy(ServeError(405, "Method Not Allowed"), "Allow: GET, HEAD\r\n");
}
static int GetDecimalWidth(long x) {
return LengthInt64Thousands(x);
}
static int GetOctalWidth(int x) {
return !x ? 1 : x < 8 ? 2 : 1 + _bsr(x) / 3;
}
static const char *DescribeCompressionRatio(char rb[8], uint8_t *zcf) {
long percent;
if (ZIP_CFILE_COMPRESSIONMETHOD(zcf) == kZipCompressionNone) {
return "n/a";
} else {
percent = lround(100 - (double)GetZipCfileCompressedSize(zcf) /
GetZipCfileUncompressedSize(zcf) * 100);
sprintf(rb, "%ld%%", MIN(999, MAX(-999, percent)));
return rb;
}
}
static char *ServeListing(void) {
long x;
ldiv_t y;
int w[3];
uint8_t *zcf;
struct tm tm;
char *p, *path;
const char *and;
struct timespec lastmod;
size_t n, pathlen, rn[6];
char rb[8], tb[20], *rp[6];
LockInc(&shared->c.listingrequests);
if (cpm.msg.method != kHttpGet && cpm.msg.method != kHttpHead)
return BadMethod();
appends(&cpm.outbuf, "\
\r\n\
\r\n\
redbean zip listing\r\n\
\r\n\
\r\n");
AppendLogo();
rp[0] = EscapeHtml(brand, -1, &rn[0]);
appendd(&cpm.outbuf, rp[0], rn[0]);
free(rp[0]);
appendf(&cpm.outbuf,
"
\r\n"
"\r\n"
"
\r\n"
"\r\n"
"\r\n",
strnlen(GetZipCdirComment(zcdir), GetZipCdirCommentSize(zcdir)),
GetZipCdirComment(zcdir));
bzero(w, sizeof(w));
n = GetZipCdirRecords(zcdir);
for (zcf = zmap + GetZipCdirOffset(zcdir); n--;
zcf += ZIP_CFILE_HDRSIZE(zcf)) {
CHECK_EQ(kZipCfileHdrMagic, ZIP_CFILE_MAGIC(zcf));
path = GetAssetPath(zcf, &pathlen);
if (!IsHiddenPath(path, pathlen)) {
w[0] = min(80, max(w[0], strwidth(path, 0) + 2));
w[1] = max(w[1], GetOctalWidth(GetZipCfileMode(zcf)));
w[2] = max(w[2], GetDecimalWidth(GetZipCfileUncompressedSize(zcf)));
}
free(path);
}
n = GetZipCdirRecords(zcdir);
for (zcf = zmap + GetZipCdirOffset(zcdir); n--;
zcf += ZIP_CFILE_HDRSIZE(zcf)) {
CHECK_EQ(kZipCfileHdrMagic, ZIP_CFILE_MAGIC(zcf));
path = GetAssetPath(zcf, &pathlen);
if (!IsHiddenPath(path, pathlen)) {
rp[0] = VisualizeControlCodes(path, pathlen, &rn[0]);
rp[1] = EscapePath(path, pathlen, &rn[1]);
rp[2] = EscapeHtml(rp[1], rn[1], &rn[2]);
rp[3] = VisualizeControlCodes(
ZIP_CFILE_COMMENT(zcf),
strnlen(ZIP_CFILE_COMMENT(zcf), ZIP_CFILE_COMMENTSIZE(zcf)), &rn[3]);
rp[4] = EscapeHtml(rp[0], rn[0], &rn[4]);
GetZipCfileTimestamps(zcf, &lastmod, 0, 0, gmtoff);
localtime_r(&lastmod.tv_sec, &tm);
iso8601(tb, &tm);
if (IsCompressionMethodSupported(ZIP_CFILE_COMPRESSIONMETHOD(zcf)) &&
IsAcceptablePath(path, pathlen)) {
appendf(&cpm.outbuf,
"%-*.*s %s %0*o %4s %,*ld %'s\r\n",
rn[2], rp[2], w[0], rn[4], rp[4], tb, w[1],
GetZipCfileMode(zcf), DescribeCompressionRatio(rb, zcf), w[2],
GetZipCfileUncompressedSize(zcf), rp[3]);
} else {
appendf(&cpm.outbuf, "%-*.*s %s %0*o %4s %,*ld %'s\r\n", w[0], rn[4],
rp[4], tb, w[1], GetZipCfileMode(zcf),
DescribeCompressionRatio(rb, zcf), w[2],
GetZipCfileUncompressedSize(zcf), rp[3]);
}
free(rp[4]);
free(rp[3]);
free(rp[2]);
free(rp[1]);
free(rp[0]);
}
free(path);
}
appends(&cpm.outbuf, "\
\r\n");
p = SetStatus(200, "OK");
p = AppendContentType(p, "text/html");
if (cpm.msg.version >= 11) {
p = stpcpy(p, "Cache-Control: no-store\r\n");
}
return CommitOutput(p);
}
static const char *MergeNames(const char *a, const char *b) {
return FreeLater(xasprintf("%s.%s", a, b));
}
static void AppendLong1(const char *a, long x) {
if (x) appendf(&cpm.outbuf, "%s: %ld\r\n", a, x);
}
static void AppendLong2(const char *a, const char *b, long x) {
if (x) appendf(&cpm.outbuf, "%s.%s: %ld\r\n", a, b, x);
}
static void AppendTimeval(const char *a, struct timeval *tv) {
AppendLong2(a, "tv_sec", tv->tv_sec);
AppendLong2(a, "tv_usec", tv->tv_usec);
}
static void AppendRusage(const char *a, struct rusage *ru) {
AppendTimeval(MergeNames(a, "ru_utime"), &ru->ru_utime);
AppendTimeval(MergeNames(a, "ru_stime"), &ru->ru_stime);
AppendLong2(a, "ru_maxrss", ru->ru_maxrss);
AppendLong2(a, "ru_ixrss", ru->ru_ixrss);
AppendLong2(a, "ru_idrss", ru->ru_idrss);
AppendLong2(a, "ru_isrss", ru->ru_isrss);
AppendLong2(a, "ru_minflt", ru->ru_minflt);
AppendLong2(a, "ru_majflt", ru->ru_majflt);
AppendLong2(a, "ru_nswap", ru->ru_nswap);
AppendLong2(a, "ru_inblock", ru->ru_inblock);
AppendLong2(a, "ru_oublock", ru->ru_oublock);
AppendLong2(a, "ru_msgsnd", ru->ru_msgsnd);
AppendLong2(a, "ru_msgrcv", ru->ru_msgrcv);
AppendLong2(a, "ru_nsignals", ru->ru_nsignals);
AppendLong2(a, "ru_nvcsw", ru->ru_nvcsw);
AppendLong2(a, "ru_nivcsw", ru->ru_nivcsw);
}
static void ServeCounters(void) {
const long *c;
const char *s;
for (c = (const long *)&shared->c, s = kCounterNames; *s;
++c, s += strlen(s) + 1) {
AppendLong1(s, *c);
}
}
static char *ServeStatusz(void) {
char *p;
LockInc(&shared->c.statuszrequests);
if (cpm.msg.method != kHttpGet && cpm.msg.method != kHttpHead) {
return BadMethod();
}
AppendLong1("pid", getpid());
AppendLong1("ppid", getppid());
AppendLong1("now", timespec_real().tv_sec);
AppendLong1("nowish", shared->nowish.tv_sec);
AppendLong1("gmtoff", gmtoff);
AppendLong1("CLK_TCK", CLK_TCK);
AppendLong1("startserver", startserver.tv_sec);
AppendLong1("lastmeltdown", shared->lastmeltdown.tv_sec);
AppendLong1("workers", shared->workers);
AppendLong1("assets.n", assets.n);
#ifndef STATIC
lua_State *L = GL;
AppendLong1("lua.memory",
lua_gc(L, LUA_GCCOUNT) * 1024 + lua_gc(L, LUA_GCCOUNTB));
#endif
ServeCounters();
AppendRusage("server", &shared->server);
AppendRusage("children", &shared->children);
p = SetStatus(200, "OK");
p = AppendContentType(p, "text/plain");
if (cpm.msg.version >= 11) {
p = stpcpy(p, "Cache-Control: no-store\r\n");
}
return CommitOutput(p);
}
static char *RedirectSlash(void) {
size_t n, i;
char *p, *e;
LockInc(&shared->c.redirects);
p = SetStatus(307, "Temporary Redirect");
p = stpcpy(p, "Location: ");
e = EscapePath(url.path.p, url.path.n, &n);
p = mempcpy(p, e, n);
p = stpcpy(p, "/");
for (i = 0; i < url.params.n; ++i) {
p = stpcpy(p, i == 0 ? "?" : "&");
p = mempcpy(p, url.params.p[i].key.p, url.params.p[i].key.n);
if (url.params.p[i].val.p) {
p = stpcpy(p, "=");
p = mempcpy(p, url.params.p[i].val.p, url.params.p[i].val.n);
}
}
p = stpcpy(p, "\r\n");
free(e);
return p;
}
static char *ServeIndex(const char *path, size_t pathlen) {
size_t i, n;
char *p, *q;
for (p = 0, i = 0; !p && i < ARRAYLEN(kIndexPaths); ++i) {
q = MergePaths(path, pathlen, kIndexPaths[i], strlen(kIndexPaths[i]), &n);
p = RoutePath(q, n);
free(q);
}
return p;
}
static char *GetLuaResponse(void) {
return cpm.luaheaderp ? cpm.luaheaderp : SetStatus(200, "OK");
}
static bool ShouldServeCrashReportDetails(void) {
uint32_t ip;
uint16_t port;
if (leakcrashreports) {
return true;
} else {
return !GetRemoteAddr(&ip, &port) && (IsLoopbackIp(ip) || IsPrivateIp(ip));
}
}
static char *LuaOnHttpRequest(void) {
char *error;
lua_State *L = GL;
effectivepath.p = url.path.p;
effectivepath.n = url.path.n;
lua_settop(L, 0); // clear Lua stack, as it needs to start fresh
lua_getglobal(L, "OnHttpRequest");
if (LuaCallWithYield(L) == LUA_OK) {
return CommitOutput(GetLuaResponse());
} else {
LogLuaError("OnHttpRequest", lua_tostring(L, -1));
error = ServeErrorWithDetail(
500, "Internal Server Error",
ShouldServeCrashReportDetails() ? lua_tostring(L, -1) : NULL);
lua_pop(L, 1); // pop error
return error;
}
}
static char *ServeLua(struct Asset *a, const char *s, size_t n) {
char *code;
size_t codelen;
lua_State *L = GL;
LockInc(&shared->c.dynamicrequests);
effectivepath.p = (void *)s;
effectivepath.n = n;
if ((code = FreeLater(LoadAsset(a, &codelen)))) {
int status =
luaL_loadbuffer(L, code, codelen,
FreeLater(xasprintf("@%s", FreeLater(strndup(s, n)))));
if (status == LUA_OK && LuaCallWithYield(L) == LUA_OK) {
return CommitOutput(GetLuaResponse());
} else {
char *error;
LogLuaError("lua code", lua_tostring(L, -1));
error = ServeErrorWithDetail(
500, "Internal Server Error",
ShouldServeCrashReportDetails() ? lua_tostring(L, -1) : NULL);
lua_pop(L, 1); // pop error
return error;
}
}
return ServeError(500, "Internal Server Error");
}
static char *HandleRedirect(struct Redirect *r) {
int code;
struct Asset *a;
if (!r->code && (a = GetAsset(r->location.s, r->location.n))) {
LockInc(&shared->c.rewrites);
DEBUGF("(rsp) internal redirect to %`'s", r->location.s);
if (!HasString(&cpm.loops, r->location.s, r->location.n)) {
AddString(&cpm.loops, r->location.s, r->location.n);
return RoutePath(r->location.s, r->location.n);
} else {
LockInc(&shared->c.loops);
return SetStatus(508, "Loop Detected");
}
} else if (cpm.msg.version < 10) {
return ServeError(505, "HTTP Version Not Supported");
} else {
LockInc(&shared->c.redirects);
code = r->code;
if (!code) code = 307;
DEBUGF("(rsp) %d redirect to %`'s", code, r->location.s);
return AppendHeader(
SetStatus(code, GetHttpReason(code)), "Location",
FreeLater(EncodeHttpHeaderValue(r->location.s, r->location.n, 0)));
}
}
static char *HandleFolder(const char *path, size_t pathlen) {
char *p;
if (url.path.n && url.path.p[url.path.n - 1] != '/' &&
SlicesEqual(path, pathlen, url.path.p, url.path.n)) {
return RedirectSlash();
}
if ((p = ServeIndex(path, pathlen))) {
return p;
} else {
LockInc(&shared->c.forbiddens);
WARNF("(srvr) directory %`'.*s lacks index page", pathlen, path);
return ServeErrorWithPath(403, "Forbidden", path, pathlen);
}
}
static bool Reindex(void) {
if (OpenZip(false)) {
LockInc(&shared->c.reindexes);
return true;
} else {
return false;
}
}
static const char *LuaCheckPath(lua_State *L, int idx, size_t *pathlen) {
const char *path;
if (lua_isnoneornil(L, idx)) {
path = url.path.p;
*pathlen = url.path.n;
} else {
path = luaL_checklstring(L, idx, pathlen);
if (!IsReasonablePath(path, *pathlen)) {
WARNF("(srvr) bad path %`'.*s", *pathlen, path);
luaL_argerror(L, idx, "bad path");
__builtin_unreachable();
}
}
return path;
}
static const char *LuaCheckHost(lua_State *L, int idx, size_t *hostlen) {
const char *host;
if (lua_isnoneornil(L, idx)) {
host = url.host.p;
*hostlen = url.host.n;
} else {
host = luaL_checklstring(L, idx, hostlen);
if (!IsAcceptableHost(host, *hostlen)) {
WARNF("(srvr) bad host %`'.*s", *hostlen, host);
luaL_argerror(L, idx, "bad host");
__builtin_unreachable();
}
}
return host;
}
static void OnlyCallFromInitLua(lua_State *L, const char *api) {
if (isinitialized) {
luaL_error(L, "%s() should be called %s", api,
"from the global scope of .init.lua");
__builtin_unreachable();
}
}
static void OnlyCallFromMainProcess(lua_State *L, const char *api) {
if (__isworker) {
luaL_error(L, "%s() should be called %s", api,
"from .init.lua or the repl");
__builtin_unreachable();
}
}
static void OnlyCallDuringConnection(lua_State *L, const char *api) {
if (!ishandlingconnection) {
luaL_error(L, "%s() can only be called %s", api,
"while handling a connection");
__builtin_unreachable();
}
}
static void OnlyCallDuringRequest(lua_State *L, const char *api) {
if (!ishandlingrequest) {
luaL_error(L, "%s() can only be called %s", api,
"while handling a request");
__builtin_unreachable();
}
}
static int LuaServe(lua_State *L, const char *api, char *impl(void)) {
OnlyCallDuringRequest(L, api);
cpm.luaheaderp = impl();
return 0;
}
static int LuaServeListing(lua_State *L) {
return LuaServe(L, "ServeListing", ServeListing);
}
static int LuaServeStatusz(lua_State *L) {
return LuaServe(L, "ServeStatusz", ServeStatusz);
}
static int LuaServeAsset(lua_State *L) {
size_t pathlen;
struct Asset *a;
const char *path;
OnlyCallDuringRequest(L, "ServeAsset");
path = LuaCheckPath(L, 1, &pathlen);
if ((a = GetAsset(path, pathlen)) && !S_ISDIR(GetMode(a))) {
cpm.luaheaderp = ServeAsset(a, path, pathlen);
lua_pushboolean(L, true);
} else {
lua_pushboolean(L, false);
}
return 1;
}
static int LuaServeIndex(lua_State *L) {
size_t pathlen;
const char *path;
OnlyCallDuringRequest(L, "ServeIndex");
path = LuaCheckPath(L, 1, &pathlen);
lua_pushboolean(L, !!(cpm.luaheaderp = ServeIndex(path, pathlen)));
return 1;
}
static int LuaServeRedirect(lua_State *L) {
int code;
char *eval;
size_t loclen;
const char *location;
OnlyCallDuringRequest(L, "ServeRedirect");
code = luaL_checkinteger(L, 1);
if (!(300 <= code && code <= 399)) {
luaL_argerror(L, 1, "bad status code");
__builtin_unreachable();
}
location = luaL_checklstring(L, 2, &loclen);
if (cpm.msg.version < 10) {
(void)ServeError(505, "HTTP Version Not Supported");
lua_pushboolean(L, false);
} else {
if (!(eval = EncodeHttpHeaderValue(location, loclen, 0))) {
luaL_argerror(L, 2, "invalid location");
__builtin_unreachable();
}
VERBOSEF("(rsp) %d redirect to %`'s", code, location);
cpm.luaheaderp =
AppendHeader(SetStatus(code, GetHttpReason(code)), "Location", eval);
free(eval);
lua_pushboolean(L, true);
}
return 1;
}
static int LuaRoutePath(lua_State *L) {
size_t pathlen;
const char *path;
OnlyCallDuringRequest(L, "RoutePath");
path = LuaCheckPath(L, 1, &pathlen);
lua_pushboolean(L, !!(cpm.luaheaderp = RoutePath(path, pathlen)));
return 1;
}
static int LuaRouteHost(lua_State *L) {
size_t hostlen, pathlen;
const char *host, *path;
OnlyCallDuringRequest(L, "RouteHost");
host = LuaCheckHost(L, 1, &hostlen);
path = LuaCheckPath(L, 2, &pathlen);
lua_pushboolean(L,
!!(cpm.luaheaderp = RouteHost(host, hostlen, path, pathlen)));
return 1;
}
static int LuaRoute(lua_State *L) {
size_t hostlen, pathlen;
const char *host, *path;
OnlyCallDuringRequest(L, "Route");
host = LuaCheckHost(L, 1, &hostlen);
path = LuaCheckPath(L, 2, &pathlen);
lua_pushboolean(L, !!(cpm.luaheaderp = Route(host, hostlen, path, pathlen)));
return 1;
}
static int LuaProgramTrustedIp(lua_State *L) {
lua_Integer ip, cidr;
uint32_t ip32, imask;
ip = luaL_checkinteger(L, 1);
cidr = luaL_optinteger(L, 2, 32);
if (!(0 <= ip && ip <= 0xffffffff)) {
luaL_argerror(L, 1, "ip out of range");
__builtin_unreachable();
}
if (!(0 <= cidr && cidr <= 32)) {
luaL_argerror(L, 2, "cidr should be 0 .. 32");
__builtin_unreachable();
}
ip32 = ip;
imask = ~(0xffffffffu << (32 - cidr));
if (ip32 & imask) {
luaL_argerror(L, 1,
"ip address isn't the network address; "
"it has bits masked by the cidr");
__builtin_unreachable();
}
ProgramTrustedIp(ip, cidr);
return 0;
}
static int LuaIsTrusted(lua_State *L) {
lua_Integer ip;
ip = luaL_checkinteger(L, 1);
if (!(0 <= ip && ip <= 0xffffffff)) {
luaL_argerror(L, 1, "ip out of range");
__builtin_unreachable();
}
lua_pushboolean(L, IsTrustedIp(ip));
return 1;
}
static int LuaRespond(lua_State *L, char *R(unsigned, const char *)) {
char *p;
int code;
size_t reasonlen;
const char *reason;
OnlyCallDuringRequest(L, "Respond");
code = luaL_checkinteger(L, 1);
if (!(100 <= code && code <= 999)) {
luaL_argerror(L, 1, "bad status code");
__builtin_unreachable();
}
if (lua_isnoneornil(L, 2)) {
cpm.luaheaderp = R(code, GetHttpReason(code));
} else {
reason = lua_tolstring(L, 2, &reasonlen);
if ((p = EncodeHttpHeaderValue(reason, MIN(reasonlen, 128), 0))) {
cpm.luaheaderp = R(code, p);
free(p);
} else {
luaL_argerror(L, 2, "invalid");
__builtin_unreachable();
}
}
return 0;
}
static int LuaSetStatus(lua_State *L) {
return LuaRespond(L, SetStatus);
}
static int LuaGetStatus(lua_State *L) {
OnlyCallDuringRequest(L, "GetStatus");
if (!cpm.statuscode) {
lua_pushnil(L);
} else {
lua_pushinteger(L, cpm.statuscode);
}
return 1;
}
static int LuaGetSslIdentity(lua_State *L) {
const mbedtls_x509_crt *cert;
OnlyCallDuringRequest(L, "GetSslIdentity");
if (!usingssl) {
lua_pushnil(L);
} else {
if (sslpskindex) {
CHECK((sslpskindex - 1) >= 0 && (sslpskindex - 1) < psks.n);
lua_pushlstring(L, psks.p[sslpskindex - 1].identity,
psks.p[sslpskindex - 1].identity_len);
} else {
cert = mbedtls_ssl_get_peer_cert(&ssl);
lua_pushstring(L, cert ? _gc(FormatX509Name(&cert->subject)) : "");
}
}
return 1;
}
static int LuaServeError(lua_State *L) {
return LuaRespond(L, ServeError);
}
static int LuaLoadAsset(lua_State *L) {
void *data;
struct Asset *a;
const char *path;
size_t size, pathlen;
path = LuaCheckPath(L, 1, &pathlen);
if ((a = GetAsset(path, pathlen))) {
if (!a->file && !IsCompressed(a)) {
/* fast path: this avoids extra copy */
data = ZIP_LFILE_CONTENT(zmap + a->lf);
size = GetZipLfileUncompressedSize(zmap + a->lf);
if (Verify(data, size, ZIP_LFILE_CRC32(zmap + a->lf))) {
lua_pushlstring(L, data, size);
return 1;
}
// any error from Verify has already been reported
} else if ((data = LoadAsset(a, &size))) {
lua_pushlstring(L, data, size);
free(data);
return 1;
} else {
WARNF("(srvr) could not load asset: %`'.*s", pathlen, path);
}
} else {
WARNF("(srvr) could not find asset: %`'.*s", pathlen, path);
}
return 0;
}
static void GetDosLocalTime(int64_t utcunixts, uint16_t *out_time,
uint16_t *out_date) {
struct tm tm;
CHECK_NOTNULL(localtime_r(&utcunixts, &tm));
*out_time = DOS_TIME(tm.tm_hour, tm.tm_min, tm.tm_sec);
*out_date = DOS_DATE(tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday + 1);
}
static void StoreAsset(const char *path, size_t pathlen, const char *data,
size_t datalen, int mode) {
int64_t ft;
uint32_t crc;
char *comp, *p;
struct timespec now;
struct Asset *a;
struct iovec v[13];
uint8_t era;
const char *use;
uint16_t gflags, iattrs, mtime, mdate, dosmode, method, disk;
size_t oldcdirsize, oldcdiroffset, records, cdiroffset, cdirsize, complen,
uselen;
if (IsOpenbsd() || IsNetbsd() || IsWindows()) {
FATALF("(cfg) StoreAsset() not available on Windows/NetBSD/OpenBSD yet");
}
INFOF("(srvr) storing asset %`'s", path);
disk = gflags = iattrs = 0;
if (isutf8(path, pathlen)) gflags |= kZipGflagUtf8;
if (istext(data, datalen)) iattrs |= kZipIattrText;
crc = crc32_z(0, data, datalen);
if (datalen < 100) {
method = kZipCompressionNone;
comp = 0;
use = data;
uselen = datalen;
era = kZipEra1989;
} else {
comp = Deflate(data, datalen, &complen);
if (complen < datalen) {
method = kZipCompressionDeflate;
use = comp;
uselen = complen;
era = kZipEra1993;
} else {
method = kZipCompressionNone;
use = data;
uselen = datalen;
era = kZipEra1989;
}
}
//////////////////////////////////////////////////////////////////////////////
if (-1 == fcntl(zfd, F_SETLKW, &(struct flock){F_WRLCK})) {
WARNF("(srvr) can't place write lock on file descriptor %d: %s", zfd,
strerror(errno));
return;
}
OpenZip(false);
now = timespec_real();
a = GetAssetZip(path, pathlen);
if (!mode) mode = a ? GetMode(a) : 0644;
if (!(mode & S_IFMT)) mode |= S_IFREG;
if (pathlen > 1 && path[0] == '/') ++path, --pathlen;
dosmode = !(mode & 0200) ? kNtFileAttributeReadonly : 0;
ft = (now.tv_sec + MODERNITYSECONDS) * HECTONANOSECONDS;
GetDosLocalTime(now.tv_sec, &mtime, &mdate);
// local file header
if (uselen >= 0xffffffff || datalen >= 0xffffffff) {
era = kZipEra2001;
v[2].iov_base = p = alloca((v[2].iov_len = 2 + 2 + 8 + 8));
p = WRITE16LE(p, kZipExtraZip64);
p = WRITE16LE(p, 8 + 8);
p = WRITE64LE(p, uselen);
p = WRITE64LE(p, datalen);
} else {
v[2].iov_len = 0;
v[2].iov_base = 0;
}
v[0].iov_base = p = alloca((v[0].iov_len = kZipLfileHdrMinSize));
p = WRITE32LE(p, kZipLfileHdrMagic);
*p++ = era;
*p++ = kZipOsDos;
p = WRITE16LE(p, gflags);
p = WRITE16LE(p, method);
p = WRITE16LE(p, mtime);
p = WRITE16LE(p, mdate);
p = WRITE32LE(p, crc);
p = WRITE32LE(p, 0xffffffffu);
p = WRITE32LE(p, 0xffffffffu);
p = WRITE16LE(p, pathlen);
p = WRITE16LE(p, v[2].iov_len);
v[1].iov_len = pathlen;
v[1].iov_base = (void *)path;
// file data
v[3].iov_len = uselen;
v[3].iov_base = (void *)use;
// old central directory entries
oldcdirsize = GetZipCdirSize(zcdir);
oldcdiroffset = GetZipCdirOffset(zcdir);
if (a) {
// to remove an existing asset,
// first copy the central directory part before its record
v[4].iov_base = zmap + oldcdiroffset;
v[4].iov_len = a->cf - oldcdiroffset;
// and then the rest of the central directory
v[5].iov_base =
zmap + oldcdiroffset + (v[4].iov_len + ZIP_CFILE_HDRSIZE(zmap + a->cf));
v[5].iov_len =
oldcdirsize - (v[4].iov_len + ZIP_CFILE_HDRSIZE(zmap + a->cf));
} else {
v[4].iov_base = zmap + oldcdiroffset;
v[4].iov_len = oldcdirsize;
v[5].iov_base = 0;
v[5].iov_len = 0;
}
// new central directory entry
if (uselen >= 0xffffffff || datalen >= 0xffffffff || zsize >= 0xffffffff) {
v[8].iov_base = p = alloca((v[8].iov_len = 2 + 2 + 8 + 8 + 8));
p = WRITE16LE(p, kZipExtraZip64);
p = WRITE16LE(p, 8 + 8 + 8);
p = WRITE64LE(p, uselen);
p = WRITE64LE(p, datalen);
p = WRITE64LE(p, zsize);
} else {
v[8].iov_len = 0;
v[8].iov_base = 0;
}
v[9].iov_base = p = alloca((v[9].iov_len = 2 + 2 + 4 + 2 + 2 + 8 + 8 + 8));
p = WRITE16LE(p, kZipExtraNtfs);
p = WRITE16LE(p, 4 + 2 + 2 + 8 + 8 + 8);
p = WRITE32LE(p, 0);
p = WRITE16LE(p, 1);
p = WRITE16LE(p, 8 + 8 + 8);
p = WRITE64LE(p, ft);
p = WRITE64LE(p, ft);
p = WRITE64LE(p, ft);
v[6].iov_base = p = alloca((v[6].iov_len = kZipCfileHdrMinSize));
p = WRITE32LE(p, kZipCfileHdrMagic);
*p++ = kZipCosmopolitanVersion;
*p++ = kZipOsUnix;
*p++ = era;
*p++ = kZipOsDos;
p = WRITE16LE(p, gflags);
p = WRITE16LE(p, method);
p = WRITE16LE(p, mtime);
p = WRITE16LE(p, mdate);
p = WRITE32LE(p, crc);
p = WRITE32LE(p, 0xffffffffu);
p = WRITE32LE(p, 0xffffffffu);
p = WRITE16LE(p, pathlen);
p = WRITE16LE(p, v[8].iov_len + v[9].iov_len);
p = WRITE16LE(p, 0);
p = WRITE16LE(p, disk);
p = WRITE16LE(p, iattrs);
p = WRITE16LE(p, dosmode);
p = WRITE16LE(p, mode);
p = WRITE32LE(p, 0xffffffffu);
v[7].iov_len = pathlen;
v[7].iov_base = (void *)path;
// zip64 end of central directory
cdiroffset =
zsize + v[0].iov_len + v[1].iov_len + v[2].iov_len + v[3].iov_len;
cdirsize = v[4].iov_len + v[5].iov_len + v[6].iov_len + v[7].iov_len +
v[8].iov_len + v[9].iov_len;
records = GetZipCdirRecords(zcdir) + !a;
if (records >= 0xffff || cdiroffset >= 0xffffffff || cdirsize >= 0xffffffff) {
v[10].iov_base = p =
alloca((v[10].iov_len = kZipCdir64HdrMinSize + kZipCdir64LocatorSize));
p = WRITE32LE(p, kZipCdir64HdrMagic);
p = WRITE64LE(p, 2 + 2 + 4 + 4 + 8 + 8 + 8 + 8);
p = WRITE16LE(p, kZipCosmopolitanVersion);
p = WRITE16LE(p, kZipEra2001);
p = WRITE32LE(p, disk);
p = WRITE32LE(p, disk);
p = WRITE64LE(p, records);
p = WRITE64LE(p, records);
p = WRITE64LE(p, cdirsize);
p = WRITE64LE(p, cdiroffset);
p = WRITE32LE(p, kZipCdir64LocatorMagic);
p = WRITE32LE(p, disk);
p = WRITE64LE(p, cdiroffset + cdirsize);
p = WRITE32LE(p, disk);
} else {
v[10].iov_len = 0;
v[10].iov_base = 0;
}
// end of central directory
v[12].iov_base = (void *)GetZipCdirComment(zcdir);
v[12].iov_len = GetZipCdirCommentSize(zcdir);
v[11].iov_base = p = alloca((v[11].iov_len = kZipCdirHdrMinSize));
p = WRITE32LE(p, kZipCdirHdrMagic);
p = WRITE16LE(p, disk);
p = WRITE16LE(p, disk);
p = WRITE16LE(p, MIN(records, 0xffff));
p = WRITE16LE(p, MIN(records, 0xffff));
p = WRITE32LE(p, MIN(cdirsize, 0xffffffff));
p = WRITE32LE(p, MIN(cdiroffset, 0xffffffff));
p = WRITE16LE(p, v[12].iov_len);
CHECK_NE(-1, lseek(zfd, zmap + zsize - zmap, SEEK_SET));
CHECK_NE(-1, WritevAll(zfd, v, 13));
CHECK_NE(-1, fcntl(zfd, F_SETLK, &(struct flock){F_UNLCK}));
//////////////////////////////////////////////////////////////////////////////
OpenZip(false);
free(comp);
}
static void StoreFile(const char *path) {
char *p;
struct stat st;
size_t plen, tlen;
const char *target = path;
if (startswith(target, "./")) target += 2;
tlen = strlen(target);
if (!IsReasonablePath(target, tlen))
FATALF("(cfg) error: can't store %`'s: contains '.' or '..' segments",
target);
if (lstat(path, &st) == -1) FATALF("(cfg) error: can't stat %`'s: %m", path);
if (!(p = xslurp(path, &plen)))
FATALF("(cfg) error: can't read %`'s: %m", path);
StoreAsset(target, tlen, p, plen, st.st_mode & 0777);
free(p);
}
static void StorePath(const char *dirpath) {
DIR *d;
char *path;
struct dirent *e;
if (!isdirectory(dirpath) && !endswith(dirpath, "/")) {
return StoreFile(dirpath);
}
if (!(d = opendir(dirpath))) FATALF("(cfg) error: can't open %`'s", dirpath);
while ((e = readdir(d))) {
if (strcmp(e->d_name, ".") == 0) continue;
if (strcmp(e->d_name, "..") == 0) continue;
path = _gc(xjoinpaths(dirpath, e->d_name));
if (e->d_type == DT_DIR) {
StorePath(path);
} else {
StoreFile(path);
}
}
closedir(d);
}
static int LuaStoreAsset(lua_State *L) {
const char *path, *data;
size_t pathlen, datalen;
int mode;
path = LuaCheckPath(L, 1, &pathlen);
if (pathlen > 0xffff) {
return luaL_argerror(L, 1, "path too long");
}
data = luaL_checklstring(L, 2, &datalen);
mode = luaL_optinteger(L, 3, 0);
StoreAsset(path, pathlen, data, datalen, mode);
return 0;
}
static void ReseedRng(mbedtls_ctr_drbg_context *r, const char *s) {
#ifndef UNSECURE
if (unsecure) return;
CHECK_EQ(0, mbedtls_ctr_drbg_reseed(r, (void *)s, strlen(s)));
#endif
}
static void LogMessage(const char *d, const char *s, size_t n) {
size_t n2, n3;
char *s2, *s3;
if (!LOGGABLE(kLogInfo)) return;
while (n && (s[n - 1] == '\r' || s[n - 1] == '\n')) --n;
if ((s2 = DecodeLatin1(s, n, &n2))) {
if ((s3 = IndentLines(s2, n2, &n3, 1))) {
INFOF("(stat) %s %,ld byte message\r\n%.*s", d, n, n3, s3);
free(s3);
}
free(s2);
}
}
static void LogBody(const char *d, const char *s, size_t n) {
char *s2, *s3;
size_t n2, n3;
if (!n) return;
if (!LOGGABLE(kLogInfo)) return;
while (n && (s[n - 1] == '\r' || s[n - 1] == '\n')) --n;
if ((s2 = VisualizeControlCodes(s, n, &n2))) {
if ((s3 = IndentLines(s2, n2, &n3, 1))) {
INFOF("(stat) %s %,ld byte payload\r\n%.*s", d, n, n3, s3);
free(s3);
}
free(s2);
}
}
static int LuaNilError(lua_State *L, const char *fmt, ...) {
va_list argp;
va_start(argp, fmt);
lua_pushnil(L);
lua_pushvfstring(L, fmt, argp);
va_end(argp);
return 2;
}
static int LuaNilTlsError(lua_State *L, const char *s, int r) {
return LuaNilError(L, "tls %s failed (%s %s)", s,
IsTiny() ? "grep" : GetTlsError(r),
_gc(xasprintf("-0x%04x", -r)));
}
#include "tool/net/fetch.inc"
static int LuaGetDate(lua_State *L) {
lua_pushinteger(L, shared->nowish.tv_sec);
return 1;
}
static int LuaGetHttpVersion(lua_State *L) {
OnlyCallDuringRequest(L, "GetHttpVersion");
lua_pushinteger(L, cpm.msg.version);
return 1;
}
static int LuaGetRedbeanVersion(lua_State *L) {
lua_pushinteger(L, VERSION);
return 1;
}
static int LuaGetMethod(lua_State *L) {
OnlyCallDuringRequest(L, "GetMethod");
if (cpm.msg.method) {
lua_pushstring(L, kHttpMethod[cpm.msg.method]);
} else {
lua_pushlstring(L, inbuf.p + cpm.msg.xmethod.a,
cpm.msg.xmethod.b - cpm.msg.xmethod.a);
}
return 1;
}
static int LuaGetAddr(lua_State *L, int GetAddr(uint32_t *, uint16_t *)) {
uint32_t ip;
uint16_t port;
if (!GetAddr(&ip, &port)) {
lua_pushinteger(L, ip);
lua_pushinteger(L, port);
return 2;
} else {
lua_pushnil(L);
return 1;
}
}
static int LuaGetServerAddr(lua_State *L) {
OnlyCallDuringConnection(L, "GetServerAddr");
return LuaGetAddr(L, GetServerAddr);
}
static int LuaGetClientAddr(lua_State *L) {
OnlyCallDuringConnection(L, "GetClientAddr");
return LuaGetAddr(L, GetClientAddr);
}
static int LuaGetRemoteAddr(lua_State *L) {
OnlyCallDuringRequest(L, "GetRemoteAddr");
return LuaGetAddr(L, GetRemoteAddr);
}
static int LuaLog(lua_State *L) {
int level, line;
lua_Debug ar;
const char *msg, *module;
level = luaL_checkinteger(L, 1);
if (LOGGABLE(level)) {
msg = luaL_checkstring(L, 2);
if (lua_getstack(L, 1, &ar) && lua_getinfo(L, "Sl", &ar)) {
module = ar.short_src;
line = ar.currentline;
} else {
module = _gc(strndup(effectivepath.p, effectivepath.n));
line = -1;
}
flogf(level, module, line, NULL, "%s", msg);
}
return 0;
}
static int LuaEncodeSmth(lua_State *L, int Encoder(lua_State *, char **, int,
struct EncoderConfig)) {
char *p = 0;
int useoutput = false;
struct EncoderConfig conf = {
.maxdepth = 64,
.sorted = true,
.pretty = false,
.indent = " ",
};
if (lua_istable(L, 2)) {
lua_settop(L, 2); // discard any extra arguments
lua_getfield(L, 2, "useoutput");
// ignore useoutput outside of request handling
if (ishandlingrequest && lua_isboolean(L, -1)) {
useoutput = lua_toboolean(L, -1);
}
lua_getfield(L, 2, "maxdepth");
if (!lua_isnoneornil(L, -1)) {
lua_Integer n = lua_tointeger(L, -1);
n = MAX(0, MIN(n, SHRT_MAX));
conf.maxdepth = n;
}
lua_getfield(L, 2, "sorted");
if (!lua_isnoneornil(L, -1)) {
conf.sorted = lua_toboolean(L, -1);
}
lua_getfield(L, 2, "pretty");
if (!lua_isnoneornil(L, -1)) {
conf.pretty = lua_toboolean(L, -1);
lua_getfield(L, 2, "indent");
if (!lua_isnoneornil(L, -1)) {
conf.indent = luaL_checkstring(L, -1);
}
}
}
lua_settop(L, 1); // keep the passed argument on top
if (Encoder(L, useoutput ? &cpm.outbuf : &p, -1, conf) == -1) {
free(p);
return 2;
}
if (useoutput) {
lua_pushboolean(L, true);
} else {
lua_pushstring(L, p);
free(p);
}
return 1;
}
static int LuaEncodeJson(lua_State *L) {
return LuaEncodeSmth(L, LuaEncodeJsonData);
}
static int LuaEncodeLua(lua_State *L) {
return LuaEncodeSmth(L, LuaEncodeLuaData);
}
static int LuaDecodeJson(lua_State *L) {
size_t n;
const char *p;
struct DecodeJson r;
p = luaL_checklstring(L, 1, &n);
r = DecodeJson(L, p, n);
if (UNLIKELY(!r.rc)) {
lua_pushnil(L);
lua_pushstring(L, "unexpected eof");
return 2;
}
if (UNLIKELY(r.rc == -1)) {
lua_pushnil(L);
lua_pushstring(L, r.p);
return 2;
}
r = DecodeJson(L, r.p, n - (r.p - p));
if (UNLIKELY(r.rc)) {
lua_pushnil(L);
lua_pushstring(L, "junk after expression");
return 2;
}
return 1;
}
static int LuaGetUrl(lua_State *L) {
char *p;
size_t n;
OnlyCallDuringRequest(L, "GetUrl");
p = EncodeUrl(&url, &n);
lua_pushlstring(L, p, n);
free(p);
return 1;
}
static int LuaGetScheme(lua_State *L) {
OnlyCallDuringRequest(L, "GetScheme");
LuaPushUrlView(L, &url.scheme);
return 1;
}
static int LuaGetPath(lua_State *L) {
OnlyCallDuringRequest(L, "GetPath");
LuaPushUrlView(L, &url.path);
return 1;
}
static int LuaGetEffectivePath(lua_State *L) {
OnlyCallDuringRequest(L, "GetEffectivePath");
lua_pushlstring(L, effectivepath.p, effectivepath.n);
return 1;
}
static int LuaGetFragment(lua_State *L) {
OnlyCallDuringRequest(L, "GetFragment");
LuaPushUrlView(L, &url.fragment);
return 1;
}
static int LuaGetUser(lua_State *L) {
size_t n;
const char *p, *q;
OnlyCallDuringRequest(L, "GetUser");
if (url.user.p) {
LuaPushUrlView(L, &url.user);
} else if ((p = gc(GetBasicAuthorization(&n)))) {
if (!(q = memchr(p, ':', n))) q = p + n;
lua_pushlstring(L, p, q - p);
} else {
lua_pushnil(L);
}
return 1;
}
static int LuaGetPass(lua_State *L) {
size_t n;
const char *p, *q;
OnlyCallDuringRequest(L, "GetPass");
if (url.user.p) {
LuaPushUrlView(L, &url.pass);
} else if ((p = gc(GetBasicAuthorization(&n)))) {
if ((q = memchr(p, ':', n))) {
lua_pushlstring(L, q + 1, p + n - (q + 1));
} else {
lua_pushnil(L);
}
} else {
lua_pushnil(L);
}
return 1;
}
static int LuaGetHost(lua_State *L) {
char b[16];
OnlyCallDuringRequest(L, "GetHost");
if (url.host.n) {
lua_pushlstring(L, url.host.p, url.host.n);
} else {
inet_ntop(AF_INET, &serveraddr->sin_addr.s_addr, b, sizeof(b));
lua_pushstring(L, b);
}
return 1;
}
static int LuaGetPort(lua_State *L) {
int i, x = 0;
OnlyCallDuringRequest(L, "GetPort");
for (i = 0; i < url.port.n; ++i) x = url.port.p[i] - '0' + x * 10;
if (!x) x = ntohs(serveraddr->sin_port);
lua_pushinteger(L, x);
return 1;
}
static int LuaGetBody(lua_State *L) {
OnlyCallDuringRequest(L, "GetBody");
lua_pushlstring(L, inbuf.p + hdrsize, payloadlength);
return 1;
}
static int LuaGetResponseBody(lua_State *L) {
char *s = "";
// response can be gzipped (>0), text (=0), or generator (<0)
int size = cpm.gzipped > 0 ? cpm.gzipped // original size
: cpm.gzipped == 0 ? cpm.contentlength
: 0;
OnlyCallDuringRequest(L, "GetResponseBody");
if (cpm.gzipped > 0 &&
(!(s = FreeLater(malloc(cpm.gzipped))) ||
!Inflate(s, cpm.gzipped, cpm.content, cpm.contentlength))) {
return LuaNilError(L, "failed to decompress response");
}
lua_pushlstring(L,
cpm.gzipped > 0 ? s // return decompressed
: cpm.gzipped == 0 ? cpm.content
: "",
size);
return 1;
}
static int LuaGetHeader(lua_State *L) {
int h;
const char *key;
size_t i, keylen;
OnlyCallDuringRequest(L, "GetHeader");
key = luaL_checklstring(L, 1, &keylen);
if ((h = GetHttpHeader(key, keylen)) != -1) {
if (cpm.msg.headers[h].a) {
return LuaPushHeader(L, &cpm.msg, inbuf.p, h);
}
} else {
for (i = 0; i < cpm.msg.xheaders.n; ++i) {
if (SlicesEqualCase(
key, keylen, inbuf.p + cpm.msg.xheaders.p[i].k.a,
cpm.msg.xheaders.p[i].k.b - cpm.msg.xheaders.p[i].k.a)) {
LuaPushLatin1(L, inbuf.p + cpm.msg.xheaders.p[i].v.a,
cpm.msg.xheaders.p[i].v.b - cpm.msg.xheaders.p[i].v.a);
return 1;
}
}
}
lua_pushnil(L);
return 1;
}
static int LuaGetHeaders(lua_State *L) {
OnlyCallDuringRequest(L, "GetHeaders");
return LuaPushHeaders(L, &cpm.msg, inbuf.p);
}
static int LuaSetHeader(lua_State *L) {
int h;
char *eval;
char *p, *q;
const char *key, *val;
size_t keylen, vallen, evallen;
OnlyCallDuringRequest(L, "SetHeader");
key = luaL_checklstring(L, 1, &keylen);
val = luaL_optlstring(L, 2, 0, &vallen);
if (!val) return 0;
if ((h = GetHttpHeader(key, keylen)) == -1) {
if (!IsValidHttpToken(key, keylen)) {
luaL_argerror(L, 1, "invalid");
__builtin_unreachable();
}
}
if (!(eval = EncodeHttpHeaderValue(val, vallen, &evallen))) {
luaL_argerror(L, 2, "invalid");
__builtin_unreachable();
}
p = GetLuaResponse();
while (p - hdrbuf.p + keylen + 2 + evallen + 2 + 512 > hdrbuf.n) {
hdrbuf.n += hdrbuf.n >> 1;
q = xrealloc(hdrbuf.p, hdrbuf.n);
cpm.luaheaderp = p = q + (p - hdrbuf.p);
hdrbuf.p = q;
}
switch (h) {
case kHttpConnection:
connectionclose = SlicesEqualCase(eval, evallen, "close", 5);
break;
case kHttpContentType:
p = AppendContentType(p, eval);
break;
case kHttpReferrerPolicy:
cpm.referrerpolicy = FreeLater(strdup(eval));
break;
case kHttpServer:
cpm.branded = true;
p = AppendHeader(p, "Server", eval);
break;
case kHttpExpires:
case kHttpCacheControl:
cpm.gotcachecontrol = true;
p = AppendHeader(p, key, eval);
break;
case kHttpXContentTypeOptions:
cpm.gotxcontenttypeoptions = true;
p = AppendHeader(p, key, eval);
break;
default:
p = AppendHeader(p, key, eval);
break;
}
cpm.luaheaderp = p;
free(eval);
return 0;
}
static int LuaGetCookie(lua_State *L) {
char *cookie = 0, *cookietmpl, *cookieval;
OnlyCallDuringRequest(L, "GetCookie");
cookietmpl = _gc(xasprintf(" %s=", luaL_checkstring(L, 1)));
if (HasHeader(kHttpCookie)) {
appends(&cookie, " "); // prepend space to simplify cookie search
appendd(&cookie, HeaderData(kHttpCookie), HeaderLength(kHttpCookie));
}
if (cookie && (cookieval = strstr(cookie, cookietmpl))) {
cookieval += strlen(cookietmpl);
lua_pushlstring(L, cookieval, strchrnul(cookieval, ';') - cookieval);
} else {
lua_pushnil(L);
}
if (cookie) free(cookie);
return 1;
}
static int LuaSetCookie(lua_State *L) {
const char *key, *val;
size_t keylen, vallen;
char *expires, *samesite = "";
char *buf = 0;
bool ishostpref, issecurepref;
const char *hostpref = "__Host-";
const char *securepref = "__Secure-";
OnlyCallDuringRequest(L, "SetCookie");
key = luaL_checklstring(L, 1, &keylen);
val = luaL_checklstring(L, 2, &vallen);
if (!IsValidHttpToken(key, keylen)) {
luaL_argerror(L, 1, "invalid");
__builtin_unreachable();
}
if (!IsValidCookieValue(val, vallen)) {
luaL_argerror(L, 2, "invalid");
__builtin_unreachable();
}
ishostpref = keylen > strlen(hostpref) &&
SlicesEqual(key, strlen(hostpref), hostpref, strlen(hostpref));
issecurepref =
keylen > strlen(securepref) &&
SlicesEqual(key, strlen(securepref), securepref, strlen(securepref));
if ((ishostpref || issecurepref) && !usingssl) {
luaL_argerror(
L, 1,
_gc(xasprintf("%s and %s prefixes require SSL", hostpref, securepref)));
__builtin_unreachable();
}
appends(&buf, key);
appends(&buf, "=");
appends(&buf, val);
if (lua_istable(L, 3)) {
if (lua_getfield(L, 3, "expires") != LUA_TNIL ||
lua_getfield(L, 3, "Expires") != LUA_TNIL) {
if (lua_isnumber(L, -1)) {
expires =
FormatUnixHttpDateTime(FreeLater(xmalloc(30)), lua_tonumber(L, -1));
} else {
expires = (void *)lua_tostring(L, -1);
if (!ParseHttpDateTime(expires, -1)) {
luaL_argerror(L, 3, "invalid data format in Expires");
__builtin_unreachable();
}
}
appends(&buf, "; Expires=");
appends(&buf, expires);
}
if ((lua_getfield(L, 3, "maxage") == LUA_TNUMBER ||
lua_getfield(L, 3, "MaxAge") == LUA_TNUMBER) &&
lua_isinteger(L, -1)) {
appends(&buf, "; Max-Age=");
appends(&buf, lua_tostring(L, -1));
}
if (lua_getfield(L, 3, "samesite") == LUA_TSTRING ||
lua_getfield(L, 3, "SameSite") == LUA_TSTRING) {
samesite = (void *)lua_tostring(L, -1); // also used in the Secure check
appends(&buf, "; SameSite=");
appends(&buf, samesite);
}
// Secure attribute is required for __Host and __Secure prefixes
// as well as for the SameSite=None
if (ishostpref || issecurepref || !strcmp(samesite, "None") ||
((lua_getfield(L, 3, "secure") == LUA_TBOOLEAN ||
lua_getfield(L, 3, "Secure") == LUA_TBOOLEAN) &&
lua_toboolean(L, -1))) {
appends(&buf, "; Secure");
}
if (!ishostpref && (lua_getfield(L, 3, "domain") == LUA_TSTRING ||
lua_getfield(L, 3, "Domain") == LUA_TSTRING)) {
appends(&buf, "; Domain=");
appends(&buf, lua_tostring(L, -1));
}
if (ishostpref || lua_getfield(L, 3, "path") == LUA_TSTRING ||
lua_getfield(L, 3, "Path") == LUA_TSTRING) {
appends(&buf, "; Path=");
appends(&buf, ishostpref ? "/" : lua_tostring(L, -1));
}
if ((lua_getfield(L, 3, "httponly") == LUA_TBOOLEAN ||
lua_getfield(L, 3, "HttpOnly") == LUA_TBOOLEAN) &&
lua_toboolean(L, -1)) {
appends(&buf, "; HttpOnly");
}
}
DEBUGF("(srvr) Set-Cookie: %s", buf);
// empty the stack and push header name/value
lua_settop(L, 0);
lua_pushliteral(L, "Set-Cookie");
lua_pushstring(L, buf);
free(buf);
return LuaSetHeader(L);
}
static int LuaHasParam(lua_State *L) {
size_t i, n;
const char *s;
OnlyCallDuringRequest(L, "HasParam");
s = luaL_checklstring(L, 1, &n);
for (i = 0; i < url.params.n; ++i) {
if (SlicesEqual(s, n, url.params.p[i].key.p, url.params.p[i].key.n)) {
lua_pushboolean(L, true);
return 1;
}
}
lua_pushboolean(L, false);
return 1;
}
static int LuaGetParam(lua_State *L) {
size_t i, n;
const char *s;
OnlyCallDuringRequest(L, "GetParam");
s = luaL_checklstring(L, 1, &n);
for (i = 0; i < url.params.n; ++i) {
if (SlicesEqual(s, n, url.params.p[i].key.p, url.params.p[i].key.n)) {
if (url.params.p[i].val.p) {
lua_pushlstring(L, url.params.p[i].val.p, url.params.p[i].val.n);
return 1;
} else {
break;
}
}
}
lua_pushnil(L);
return 1;
}
static int LuaGetParams(lua_State *L) {
OnlyCallDuringRequest(L, "GetParams");
LuaPushUrlParams(L, &url.params);
return 1;
}
static int LuaWrite(lua_State *L) {
size_t size;
const char *data;
OnlyCallDuringRequest(L, "Write");
if (!lua_isnil(L, 1)) {
data = luaL_checklstring(L, 1, &size);
appendd(&cpm.outbuf, data, size);
}
return 0;
}
static dontinline int LuaProgramInt(lua_State *L, void P(long)) {
P(luaL_checkinteger(L, 1));
return 0;
}
static int LuaProgramPort(lua_State *L) {
OnlyCallFromInitLua(L, "ProgramPort");
return LuaProgramInt(L, ProgramPort);
}
static int LuaProgramCache(lua_State *L) {
OnlyCallFromMainProcess(L, "ProgramCache");
ProgramCache(luaL_checkinteger(L, 1), luaL_optstring(L, 2, NULL));
return 0;
}
static int LuaProgramTimeout(lua_State *L) {
OnlyCallFromInitLua(L, "ProgramTimeout");
return LuaProgramInt(L, ProgramTimeout);
}
static int LuaProgramUid(lua_State *L) {
OnlyCallFromInitLua(L, "ProgramUid");
return LuaProgramInt(L, ProgramUid);
}
static int LuaProgramGid(lua_State *L) {
OnlyCallFromInitLua(L, "ProgramGid");
return LuaProgramInt(L, ProgramGid);
}
static int LuaProgramMaxPayloadSize(lua_State *L) {
OnlyCallFromInitLua(L, "ProgramMaxPayloadSize");
return LuaProgramInt(L, ProgramMaxPayloadSize);
}
static int LuaGetClientFd(lua_State *L) {
OnlyCallDuringConnection(L, "GetClientFd");
lua_pushinteger(L, client);
return 1;
}
static int LuaIsClientUsingSsl(lua_State *L) {
OnlyCallDuringConnection(L, "IsClientUsingSsl");
lua_pushboolean(L, usingssl);
return 1;
}
static int LuaProgramSslTicketLifetime(lua_State *L) {
OnlyCallFromInitLua(L, "ProgramSslTicketLifetime");
return LuaProgramInt(L, ProgramSslTicketLifetime);
}
static int LuaProgramUniprocess(lua_State *L) {
OnlyCallFromInitLua(L, "ProgramUniprocess");
if (!lua_isboolean(L, 1) && !lua_isnoneornil(L, 1)) {
return luaL_argerror(L, 1, "invalid uniprocess mode; boolean expected");
}
lua_pushboolean(L, uniprocess);
if (lua_isboolean(L, 1)) uniprocess = lua_toboolean(L, 1);
return 1;
}
static int LuaProgramHeartbeatInterval(lua_State *L) {
int64_t millis;
OnlyCallFromMainProcess(L, "ProgramHeartbeatInterval");
if (!lua_isnoneornil(L, 1)) {
millis = luaL_checkinteger(L, 1);
millis = MAX(100, millis);
heartbeatinterval = timespec_frommillis(millis);
}
lua_pushinteger(L, timespec_tomillis(heartbeatinterval));
return 1;
}
static int LuaProgramMaxWorkers(lua_State *L) {
OnlyCallFromMainProcess(L, "ProgramMaxWorkers");
if (!lua_isinteger(L, 1) && !lua_isnoneornil(L, 1)) {
return luaL_argerror(L, 1, "invalid number of workers; integer expected");
}
lua_pushinteger(L, maxworkers);
if (lua_isinteger(L, 1)) maxworkers = lua_tointeger(L, 1);
maxworkers = MAX(maxworkers, 1);
return 1;
}
static int LuaProgramAddr(lua_State *L) {
uint32_t ip;
OnlyCallFromInitLua(L, "ProgramAddr");
if (lua_isinteger(L, 1)) {
ip = luaL_checkinteger(L, 1);
ips.p = realloc(ips.p, ++ips.n * sizeof(*ips.p));
ips.p[ips.n - 1] = ip;
} else {
ProgramAddr(luaL_checkstring(L, 1));
}
return 0;
}
static dontinline int LuaProgramString(lua_State *L, void P(const char *)) {
P(luaL_checkstring(L, 1));
return 0;
}
static int LuaProgramBrand(lua_State *L) {
OnlyCallFromMainProcess(L, "ProgramBrand");
return LuaProgramString(L, ProgramBrand);
}
static int LuaProgramDirectory(lua_State *L) {
struct stat st;
const char *path = luaL_checkstring(L, 1);
// check to raise a Lua error, to allow it to be handled
if (stat(path, &st) == -1 || !S_ISDIR(st.st_mode)) {
return luaL_argerror(L, 1, "not a directory");
}
return LuaProgramString(L, ProgramDirectory);
}
static int LuaProgramLogPath(lua_State *L) {
OnlyCallFromInitLua(L, "ProgramLogPath");
return LuaProgramString(L, ProgramLogPath);
}
static int LuaProgramPidPath(lua_State *L) {
OnlyCallFromInitLua(L, "ProgramPidPath");
return LuaProgramString(L, ProgramPidPath);
}
static int LuaProgramSslPresharedKey(lua_State *L) {
struct Psk psk;
size_t n1, n2, i;
const char *p1, *p2;
OnlyCallFromMainProcess(L, "ProgramSslPresharedKey");
p1 = luaL_checklstring(L, 1, &n1);
p2 = luaL_checklstring(L, 2, &n2);
if (!n1 || n1 > MBEDTLS_PSK_MAX_LEN || !n2) {
luaL_argerror(L, 1, "bad preshared key length");
__builtin_unreachable();
}
psk.key = memcpy(malloc(n1), p1, n1);
psk.key_len = n1;
psk.identity = memcpy(malloc(n2), p2, n2);
psk.identity_len = n2;
for (i = 0; i < psks.n; ++i) {
if (SlicesEqual(psk.identity, psk.identity_len, psks.p[i].identity,
psks.p[i].identity_len)) {
mbedtls_platform_zeroize(psks.p[i].key, psks.p[i].key_len);
free(psks.p[i].key);
free(psks.p[i].identity);
psks.p[i] = psk;
return 0;
}
}
psks.p = realloc(psks.p, ++psks.n * sizeof(*psks.p));
psks.p[psks.n - 1] = psk;
return 0;
}
static int LuaProgramSslCiphersuite(lua_State *L) {
const mbedtls_ssl_ciphersuite_t *suite;
OnlyCallFromInitLua(L, "ProgramSslCiphersuite");
if (!(suite = GetCipherSuite(luaL_checkstring(L, 1)))) {
luaL_argerror(L, 1, "unsupported or unknown ciphersuite");
__builtin_unreachable();
}
suites.p = realloc(suites.p, (++suites.n + 1) * sizeof(*suites.p));
suites.p[suites.n - 1] = suite->id;
suites.p[suites.n - 0] = 0;
return 0;
}
static int LuaProgramPrivateKey(lua_State *L) {
size_t n;
const char *p;
OnlyCallFromInitLua(L, "ProgramPrivateKey");
p = luaL_checklstring(L, 1, &n);
ProgramPrivateKey(p, n);
return 0;
}
static int LuaProgramCertificate(lua_State *L) {
size_t n;
const char *p;
OnlyCallFromInitLua(L, "ProgramCertificate");
p = luaL_checklstring(L, 1, &n);
ProgramCertificate(p, n);
return 0;
}
static int LuaProgramHeader(lua_State *L) {
ProgramHeader(
_gc(xasprintf("%s: %s", luaL_checkstring(L, 1), luaL_checkstring(L, 2))));
return 0;
}
static int LuaProgramRedirect(lua_State *L) {
int code;
const char *from, *to;
code = luaL_checkinteger(L, 1);
from = luaL_checkstring(L, 2);
to = luaL_checkstring(L, 3);
ProgramRedirect(code, strdup(from), strlen(from), strdup(to), strlen(to));
return 0;
}
static dontinline int LuaProgramBool(lua_State *L, bool *b) {
*b = lua_toboolean(L, 1);
return 0;
}
static int LuaProgramSslClientVerify(lua_State *L) {
OnlyCallFromInitLua(L, "ProgramSslClientVerify");
return LuaProgramBool(L, &sslclientverify);
}
static int LuaProgramSslRequired(lua_State *L) {
OnlyCallFromInitLua(L, "ProgramSslRequired");
return LuaProgramBool(L, &requiressl);
}
static int LuaProgramSslFetchVerify(lua_State *L) {
OnlyCallFromMainProcess(L, "ProgramSslFetchVerify");
return LuaProgramBool(L, &sslfetchverify);
}
static int LuaProgramSslInit(lua_State *L) {
OnlyCallFromInitLua(L, "SslInit");
TlsInit();
return 0;
}
static int LuaProgramLogMessages(lua_State *L) {
return LuaProgramBool(L, &logmessages);
}
static int LuaProgramLogBodies(lua_State *L) {
return LuaProgramBool(L, &logbodies);
}
static int LuaEvadeDragnetSurveillance(lua_State *L) {
return LuaProgramBool(L, &evadedragnetsurveillance);
}
static int LuaHidePath(lua_State *L) {
size_t pathlen;
const char *path;
path = luaL_checklstring(L, 1, &pathlen);
AddString(&hidepaths, memcpy(malloc(pathlen), path, pathlen), pathlen);
return 0;
}
static int LuaIsHiddenPath(lua_State *L) {
size_t n;
const char *s;
s = luaL_checklstring(L, 1, &n);
lua_pushboolean(L, IsHiddenPath(s, n));
return 1;
}
static int LuaGetZipPaths(lua_State *L) {
char *path;
uint8_t *zcf;
size_t i, n, pathlen, prefixlen;
const char *prefix = luaL_optlstring(L, 1, "", &prefixlen);
lua_newtable(L);
i = 0;
n = GetZipCdirRecords(zcdir);
for (zcf = zmap + GetZipCdirOffset(zcdir); n--;
zcf += ZIP_CFILE_HDRSIZE(zcf)) {
CHECK_EQ(kZipCfileHdrMagic, ZIP_CFILE_MAGIC(zcf));
path = GetAssetPath(zcf, &pathlen);
if (prefixlen == 0 || startswith(path, prefix)) {
lua_pushlstring(L, path, pathlen);
lua_seti(L, -2, ++i);
}
free(path);
}
return 1;
}
static int LuaGetAssetMode(lua_State *L) {
size_t pathlen;
struct Asset *a;
const char *path;
path = LuaCheckPath(L, 1, &pathlen);
if ((a = GetAsset(path, pathlen))) {
lua_pushinteger(L, GetMode(a));
} else {
lua_pushnil(L);
}
return 1;
}
static int LuaGetAssetLastModifiedTime(lua_State *L) {
size_t pathlen;
struct Asset *a;
const char *path;
struct timespec lm;
int64_t zuluseconds;
path = LuaCheckPath(L, 1, &pathlen);
if ((a = GetAsset(path, pathlen))) {
if (a->file) {
zuluseconds = a->file->st.st_mtim.tv_sec;
} else {
GetZipCfileTimestamps(zmap + a->cf, &lm, 0, 0, gmtoff);
zuluseconds = lm.tv_sec;
}
lua_pushinteger(L, zuluseconds);
} else {
lua_pushnil(L);
}
return 1;
}
static int LuaGetAssetSize(lua_State *L) {
size_t pathlen;
struct Asset *a;
const char *path;
path = LuaCheckPath(L, 1, &pathlen);
if ((a = GetAsset(path, pathlen))) {
if (a->file) {
lua_pushinteger(L, a->file->st.st_size);
} else {
lua_pushinteger(L, GetZipLfileUncompressedSize(zmap + a->lf));
}
} else {
lua_pushnil(L);
}
return 1;
}
static int LuaIsAssetCompressed(lua_State *L) {
size_t pathlen;
struct Asset *a;
const char *path;
path = LuaCheckPath(L, 1, &pathlen);
if ((a = GetAsset(path, pathlen))) {
lua_pushboolean(L, IsCompressed(a));
} else {
lua_pushnil(L);
}
return 1;
}
static bool Blackhole(uint32_t ip) {
char buf[4];
if (blackhole.fd <= 0) return false;
WRITE32BE(buf, ip);
if (sendto(blackhole.fd, &buf, 4, 0, (struct sockaddr *)&blackhole.addr,
sizeof(blackhole.addr)) != -1) {
return true;
} else {
VERBOSEF("(token) sendto(%s) failed: %m", blackhole.addr.sun_path);
errno = 0;
return false;
}
}
static int LuaBlackhole(lua_State *L) {
lua_Integer ip;
ip = luaL_checkinteger(L, 1);
if (!(0 <= ip && ip <= 0xffffffff)) {
luaL_argerror(L, 1, "ip out of range");
__builtin_unreachable();
}
lua_pushboolean(L, Blackhole(ip));
return 1;
}
wontreturn static void Replenisher(void) {
struct timespec ts;
VERBOSEF("(token) replenish worker started");
strace_enabled(-1);
signal(SIGINT, OnTerm);
signal(SIGHUP, OnTerm);
signal(SIGTERM, OnTerm);
signal(SIGUSR1, SIG_IGN); // make sure reload won't kill this
signal(SIGUSR2, SIG_IGN); // make sure meltdown won't kill this
ts = timespec_real();
while (!terminated) {
if (clock_nanosleep(CLOCK_REALTIME, TIMER_ABSTIME, &ts, 0)) {
errno = 0;
continue;
}
ReplenishTokens(tokenbucket.w, (1ul << tokenbucket.cidr) / 8);
ts = timespec_add(ts, tokenbucket.replenish);
DEBUGF("(token) replenished tokens");
}
VERBOSEF("(token) replenish worker exiting");
_Exit(0);
}
static int LuaAcquireToken(lua_State *L) {
uint32_t ip;
if (!tokenbucket.cidr) {
luaL_error(L, "ProgramTokenBucket() needs to be called first");
__builtin_unreachable();
}
GetClientAddr(&ip, 0);
lua_pushinteger(L, AcquireToken(tokenbucket.b, luaL_optinteger(L, 1, ip),
tokenbucket.cidr));
return 1;
}
static int LuaCountTokens(lua_State *L) {
uint32_t ip;
if (!tokenbucket.cidr) {
luaL_error(L, "ProgramTokenBucket() needs to be called first");
__builtin_unreachable();
}
GetClientAddr(&ip, 0);
lua_pushinteger(L, CountTokens(tokenbucket.b, luaL_optinteger(L, 1, ip),
tokenbucket.cidr));
return 1;
}
static int LuaProgramTokenBucket(lua_State *L) {
if (tokenbucket.cidr) {
luaL_error(L, "ProgramTokenBucket() can only be called once");
__builtin_unreachable();
}
lua_Number replenish = luaL_optnumber(L, 1, 1); // per second
lua_Integer cidr = luaL_optinteger(L, 2, 24);
lua_Integer reject = luaL_optinteger(L, 3, 30);
lua_Integer ignore = luaL_optinteger(L, 4, MIN(reject / 2, 15));
lua_Integer ban = luaL_optinteger(L, 5, MIN(ignore / 10, 1));
if (!(1 / 3600. <= replenish && replenish <= 1e6)) {
luaL_argerror(L, 1, "require 1/3600 <= replenish <= 1e6");
__builtin_unreachable();
}
if (!(8 <= cidr && cidr <= 32)) {
luaL_argerror(L, 2, "require 8 <= cidr <= 32");
__builtin_unreachable();
}
if (!(-1 <= reject && reject <= 126)) {
luaL_argerror(L, 3, "require -1 <= reject <= 126");
__builtin_unreachable();
}
if (!(-1 <= ignore && ignore <= 126)) {
luaL_argerror(L, 4, "require -1 <= ignore <= 126");
__builtin_unreachable();
}
if (!(-1 <= ban && ban <= 126)) {
luaL_argerror(L, 5, "require -1 <= ban <= 126");
__builtin_unreachable();
}
if (!(ignore <= reject)) {
luaL_argerror(L, 4, "require ignore <= reject");
__builtin_unreachable();
}
if (!(ban <= ignore)) {
luaL_argerror(L, 5, "require ban <= ignore");
__builtin_unreachable();
}
VERBOSEF("(token) deploying %,ld buckets "
"(one for every %ld ips) "
"each holding 127 tokens which "
"replenish %g times per second, "
"reject at %d tokens, "
"ignore at %d tokens, and "
"ban at %d tokens",
1L << cidr, //
4294967296 / (1L << cidr), //
replenish, //
reject, //
ignore, //
ban);
if (ignore == -1) ignore = -128;
if (ban == -1) ban = -128;
if (ban >= 0 && (IsLinux() || IsBsd())) {
uint32_t testip = 0;
blackhole.addr.sun_family = AF_UNIX;
strlcpy(blackhole.addr.sun_path, "/var/run/blackhole.sock",
sizeof(blackhole.addr.sun_path));
if ((blackhole.fd = socket(AF_UNIX, SOCK_DGRAM, 0)) == -1) {
WARNF("(token) socket(AF_UNIX) failed: %m");
ban = -1;
} else if (sendto(blackhole.fd, &testip, 4, 0,
(struct sockaddr *)&blackhole.addr,
sizeof(blackhole.addr)) == -1) {
VERBOSEF("(token) error: sendto(%`'s) failed: %m",
blackhole.addr.sun_path);
VERBOSEF("(token) redbean isn't able to protect your kernel from ddos");
VERBOSEF("(token) please run the blackholed program; see our website!");
}
}
tokenbucket.b = _mapshared(ROUNDUP(1ul << cidr, FRAMESIZE));
memset(tokenbucket.b, 127, 1ul << cidr);
tokenbucket.cidr = cidr;
tokenbucket.reject = reject;
tokenbucket.ignore = ignore;
tokenbucket.ban = ban;
tokenbucket.replenish = timespec_fromnanos(1 / replenish * 1e9);
int pid = fork();
npassert(pid != -1);
if (!pid) Replenisher();
++shared->workers;
return 0;
}
static const char *GetContentTypeExt(const char *path, size_t n) {
const char *r, *e;
int top;
lua_State *L = GL;
if ((r = FindContentType(path, n))) return r;
// extract the last .; use the entire path if none is present
if ((e = memrchr(path, '.', n))) {
n -= e - path + 1;
path = e + 1;
}
top = lua_gettop(L);
lua_pushlightuserdata(L, (void *)&ctIdx); // push address as unique key
CHECK_EQ(lua_gettable(L, LUA_REGISTRYINDEX), LUA_TTABLE);
lua_pushlstring(L, path, n);
if (lua_gettable(L, -2) == LUA_TSTRING)
r = FreeLater(strdup(lua_tostring(L, -1)));
lua_settop(L, top);
return r;
}
static int LuaProgramContentType(lua_State *L) {
const char *ext = luaL_checkstring(L, 1);
const char *ct;
int n = lua_gettop(L);
lua_pushlightuserdata(L, (void *)&ctIdx); // push address as unique key
CHECK_EQ(lua_gettable(L, LUA_REGISTRYINDEX), LUA_TTABLE);
if (n == 1) {
ext = FreeLater(xasprintf(".%s", ext));
if ((ct = GetContentTypeExt(ext, strlen(ext)))) {
lua_pushstring(L, ct);
} else {
lua_pushnil(L);
}
return 1;
} else {
ct = luaL_checkstring(L, 2);
lua_pushstring(L, ext);
lua_pushstring(L, ct);
lua_settable(L, -3); // table[ext] = ct
return 0;
}
}
static int LuaIsDaemon(lua_State *L) {
lua_pushboolean(L, daemonize);
return 1;
}
static int LuaGetAssetComment(lua_State *L) {
struct Asset *a;
const char *path;
size_t pathlen, m;
path = LuaCheckPath(L, 1, &pathlen);
if ((a = GetAssetZip(path, pathlen)) &&
(m = strnlen(ZIP_CFILE_COMMENT(zmap + a->cf),
ZIP_CFILE_COMMENTSIZE(zmap + a->cf)))) {
lua_pushlstring(L, ZIP_CFILE_COMMENT(zmap + a->cf), m);
} else {
lua_pushnil(L);
}
return 1;
}
static int LuaLaunchBrowser(lua_State *L) {
OnlyCallFromInitLua(L, "LaunchBrowser");
launchbrowser = strdup(luaL_optstring(L, 1, "/"));
return 0;
}
static bool LuaRunAsset(const char *path, bool mandatory) {
int status;
struct Asset *a;
const char *code;
size_t pathlen, codelen;
pathlen = strlen(path);
if ((a = GetAsset(path, pathlen))) {
if ((code = FreeLater(LoadAsset(a, &codelen)))) {
lua_State *L = GL;
effectivepath.p = (void *)path;
effectivepath.n = pathlen;
DEBUGF("(lua) LuaRunAsset(%`'s)", path);
status = luaL_loadbuffer(
L, code, codelen,
FreeLater(xasprintf("@%s%s", a->file ? "" : "/zip", path)));
if (status != LUA_OK || LuaCallWithTrace(L, 0, 0, NULL) != LUA_OK) {
LogLuaError("lua code", lua_tostring(L, -1));
lua_pop(L, 1); // pop error
if (mandatory) exit(1);
}
}
}
return !!a;
}
static int LuaUpgradeWS(lua_State *L) {
size_t i;
char *p, *q;
bool haskey;
mbedtls_sha1_context ctx;
unsigned char hash[20];
OnlyCallDuringRequest(L, "UpgradeWS");
haskey = true;
for (i = 0; i < cpm.msg.xheaders.n; ++i) {
if (SlicesEqualCase(
"Sec-WebSocket-Key", strlen("Sec-WebSocket-Key"),
inbuf.p + cpm.msg.xheaders.p[i].k.a,
cpm.msg.xheaders.p[i].k.b - cpm.msg.xheaders.p[i].k.a)) {
mbedtls_sha1_init(&ctx);
mbedtls_sha1_starts_ret(&ctx);
mbedtls_sha1_update_ret(
&ctx, (unsigned char *)inbuf.p + cpm.msg.xheaders.p[i].v.a,
cpm.msg.xheaders.p[i].v.b - cpm.msg.xheaders.p[i].v.a);
haskey = true;
break;
}
}
if (!haskey) luaL_error(L, "No Sec-WebSocket-Key header");
p = SetStatus(101, "Switching Protocols");
while (p - hdrbuf.p + (20 + 21 + (20 + 28 + 4)) + 512 > hdrbuf.n) {
hdrbuf.n += hdrbuf.n >> 1;
q = xrealloc(hdrbuf.p, hdrbuf.n);
cpm.luaheaderp = p = q + (p - hdrbuf.p);
hdrbuf.p = q;
}
mbedtls_sha1_update_ret(
&ctx, (unsigned char *)"258EAFA5-E914-47DA-95CA-C5AB0DC85B11", 36);
mbedtls_sha1_finish_ret(&ctx, hash);
char *accept = EncodeBase64((char *)hash, 20, NULL);
p = stpcpy(p, "Upgrade: websocket\r\n");
p = stpcpy(p, "Connection: upgrade\r\n");
p = AppendHeader(p, "Sec-WebSocket-Accept", accept);
cpm.luaheaderp = p;
cpm.iswebsocket = true;
return 0;
}
static int LuaReadWS(lua_State *L) {
ssize_t rc;
size_t i, got, amt;
unsigned char wshdr[10], wshdrlen, *extlen, *mask;
uint64_t len;
OnlyCallDuringRequest(L, "ReadWS");
got = 0;
do {
if ((rc = reader(client, wshdr + got, 2 - got)) == -1)
luaL_error(L, "Could not read WS header");
} while ((got += rc) < 2);
if (!(wshdr[1] | (1 << 7))) luaL_error(L, "Unmasked WS frame");
len = wshdr[1] & ~(1 << 7);
wshdrlen = 6;
if (len == 126) {
wshdrlen = 8;
} else if (len == 127) {
wshdrlen = 14;
}
while (got < wshdrlen) {
if ((rc = reader(client, wshdr + got, wshdrlen - got)) == -1)
luaL_error(L, "Could not read WS extended length");
got += rc;
}
extlen = &wshdr[2];
mask = &wshdr[wshdrlen - 4];
if (len == 126) {
len = be16toh(*(uint16_t *)extlen);
} else if (len == 127) {
len = be64toh(*(uint64_t *)extlen);
}
if (len >= inbuf.n - amtread)
luaL_error(L, "Required %d bytes to read WS frame, %d bytes available", len,
inbuf.n - amtread);
for (got = 0, amt = amtread; got < len; got += rc, amt += rc) {
if ((rc = reader(client, inbuf.p + amt, len - got)) == -1)
luaL_error(L, "Could not read WS data");
}
if ((wshdr[0] & 0xF) == 0x8)
luaL_error(L, "WS connection closed");
for (i = 0, amt = amtread; i < got; ++i, ++amt) inbuf.p[amt] ^= mask[i & 0x3];
lua_pushlstring(L, inbuf.p + amtread, got);
return 1;
}
//
// list of functions that can't be run from the repl
static const char *const kDontAutoComplete[] = {
"Compress", // deprecated
"GetBody", //
"GetClientAddr", //
"GetClientFd", //
"GetComment", // deprecated
"GetCookie", //
"GetEffectivePath", //
"GetFragment", //
"GetHeader", //
"GetHeaders", //
"GetHost", //
"GetHttpVersion", //
"GetLastModifiedTime", // deprecated
"GetMethod", //
"GetParam", //
"GetParams", //
"GetPass", //
"GetPath", //
"GetPayload", // deprecated
"GetPort", //
"GetRemoteAddr", //
"GetResponseBody", //
"GetScheme", //
"GetServerAddr", //
"GetSslIdentity", //
"GetStatus", //
"GetUrl", //
"GetUser", //
"GetVersion", // deprecated
"HasParam", //
"IsClientUsingSsl", //
"IsCompressed", // deprecated
"LaunchBrowser", //
"LuaProgramSslRequired", // TODO
"ProgramAddr", // TODO
"ProgramBrand", //
"ProgramCertificate", // TODO
"ProgramGid", //
"ProgramLogPath", // TODO
"ProgramMaxPayloadSize", // TODO
"ProgramPidPath", // TODO
"ProgramPort", // TODO
"ProgramPrivateKey", // TODO
"ProgramSslCiphersuite", // TODO
"ProgramSslClientVerify", // TODO
"ProgramSslTicketLifetime", //
"ProgramTimeout", // TODO
"ProgramUid", //
"ProgramUniprocess", //
"Respond", //
"Route", //
"RouteHost", //
"RoutePath", //
"ServeAsset", //
"ServeIndex", //
"ServeListing", //
"ServeRedirect", //
"ServeStatusz", //
"SetCookie", //
"SetHeader", //
"SslInit", // TODO
"Uncompress", // deprecated
"Write", //
};
//
static const luaL_Reg kLuaFuncs[] = {
{"Barf", LuaBarf}, //
{"Benchmark", LuaBenchmark}, //
{"Bsf", LuaBsf}, //
{"Bsr", LuaBsr}, //
{"CategorizeIp", LuaCategorizeIp}, //
{"Compress", LuaCompress}, //
{"Crc32", LuaCrc32}, //
{"Crc32c", LuaCrc32c}, //
{"Decimate", LuaDecimate}, //
{"DecodeBase32", LuaDecodeBase32}, //
{"DecodeBase64", LuaDecodeBase64}, //
{"DecodeHex", LuaDecodeHex}, //
{"DecodeJson", LuaDecodeJson}, //
{"DecodeLatin1", LuaDecodeLatin1}, //
{"Deflate", LuaDeflate}, //
{"EncodeBase32", LuaEncodeBase32}, //
{"EncodeBase64", LuaEncodeBase64}, //
{"EncodeHex", LuaEncodeHex}, //
{"EncodeJson", LuaEncodeJson}, //
{"EncodeLatin1", LuaEncodeLatin1}, //
{"EncodeLua", LuaEncodeLua}, //
{"EncodeUrl", LuaEncodeUrl}, //
{"EscapeFragment", LuaEscapeFragment}, //
{"EscapeHost", LuaEscapeHost}, //
{"EscapeHtml", LuaEscapeHtml}, //
{"EscapeIp", LuaEscapeIp}, //
{"EscapeLiteral", LuaEscapeLiteral}, //
{"EscapeParam", LuaEscapeParam}, //
{"EscapePass", LuaEscapePass}, //
{"EscapePath", LuaEscapePath}, //
{"EscapeSegment", LuaEscapeSegment}, //
{"EscapeUser", LuaEscapeUser}, //
{"Fetch", LuaFetch}, //
{"FormatHttpDateTime", LuaFormatHttpDateTime}, //
{"FormatIp", LuaFormatIp}, //
{"GetAssetComment", LuaGetAssetComment}, //
{"GetAssetLastModifiedTime", LuaGetAssetLastModifiedTime}, //
{"GetAssetMode", LuaGetAssetMode}, //
{"GetAssetSize", LuaGetAssetSize}, //
{"GetBody", LuaGetBody}, //
{"GetClientAddr", LuaGetClientAddr}, //
{"GetClientFd", LuaGetClientFd}, //
{"GetCookie", LuaGetCookie}, //
{"GetCpuCore", LuaGetCpuCore}, //
{"GetCpuCount", LuaGetCpuCount}, //
{"GetCpuNode", LuaGetCpuNode}, //
{"GetCryptoHash", LuaGetCryptoHash}, //
{"GetDate", LuaGetDate}, //
{"GetEffectivePath", LuaGetEffectivePath}, //
{"GetFragment", LuaGetFragment}, //
{"GetHeader", LuaGetHeader}, //
{"GetHeaders", LuaGetHeaders}, //
{"GetHost", LuaGetHost}, //
{"GetHostIsa", LuaGetHostIsa}, //
{"GetHostOs", LuaGetHostOs}, //
{"GetHttpReason", LuaGetHttpReason}, //
{"GetHttpVersion", LuaGetHttpVersion}, //
{"GetLogLevel", LuaGetLogLevel}, //
{"GetMethod", LuaGetMethod}, //
{"GetMonospaceWidth", LuaGetMonospaceWidth}, //
{"GetParam", LuaGetParam}, //
{"GetParams", LuaGetParams}, //
{"GetPass", LuaGetPass}, //
{"GetPath", LuaGetPath}, //
{"GetPort", LuaGetPort}, //
{"GetRandomBytes", LuaGetRandomBytes}, //
{"GetRedbeanVersion", LuaGetRedbeanVersion}, //
{"GetRemoteAddr", LuaGetRemoteAddr}, //
{"GetResponseBody", LuaGetResponseBody}, //
{"GetScheme", LuaGetScheme}, //
{"GetServerAddr", LuaGetServerAddr}, //
{"GetStatus", LuaGetStatus}, //
{"GetTime", LuaGetTime}, //
{"GetUrl", LuaGetUrl}, //
{"GetUser", LuaGetUser}, //
{"GetZipPaths", LuaGetZipPaths}, //
{"HasControlCodes", LuaHasControlCodes}, //
{"HasParam", LuaHasParam}, //
{"HidePath", LuaHidePath}, //
{"HighwayHash64", LuaHighwayHash64}, //
{"IndentLines", LuaIndentLines}, //
{"Inflate", LuaInflate}, //
{"IsAcceptableHost", LuaIsAcceptableHost}, //
{"IsAcceptablePath", LuaIsAcceptablePath}, //
{"IsAcceptablePort", LuaIsAcceptablePort}, //
{"IsAssetCompressed", LuaIsAssetCompressed}, //
{"IsClientUsingSsl", LuaIsClientUsingSsl}, //
{"IsDaemon", LuaIsDaemon}, //
{"IsHeaderRepeatable", LuaIsHeaderRepeatable}, //
{"IsHiddenPath", LuaIsHiddenPath}, //
{"IsLoopbackIp", LuaIsLoopbackIp}, //
{"IsPrivateIp", LuaIsPrivateIp}, //
{"IsPublicIp", LuaIsPublicIp}, //
{"IsReasonablePath", LuaIsReasonablePath}, //
{"IsTrustedIp", LuaIsTrusted}, // undocumented
{"IsValidHttpToken", LuaIsValidHttpToken}, //
{"LaunchBrowser", LuaLaunchBrowser}, //
{"Lemur64", LuaLemur64}, //
{"LoadAsset", LuaLoadAsset}, //
{"Log", LuaLog}, //
{"Md5", LuaMd5}, //
{"MeasureEntropy", LuaMeasureEntropy}, //
{"ParseHost", LuaParseHost}, //
{"ParseHttpDateTime", LuaParseHttpDateTime}, //
{"ParseIp", LuaParseIp}, //
{"ParseParams", LuaParseParams}, //
{"ParseUrl", LuaParseUrl}, //
{"Popcnt", LuaPopcnt}, //
{"ProgramAddr", LuaProgramAddr}, //
{"ProgramBrand", LuaProgramBrand}, //
{"ProgramCache", LuaProgramCache}, //
{"ProgramContentType", LuaProgramContentType}, //
{"ProgramDirectory", LuaProgramDirectory}, //
{"ProgramGid", LuaProgramGid}, //
{"ProgramHeader", LuaProgramHeader}, //
{"ProgramHeartbeatInterval", LuaProgramHeartbeatInterval}, //
{"ProgramLogBodies", LuaProgramLogBodies}, //
{"ProgramLogMessages", LuaProgramLogMessages}, //
{"ProgramLogPath", LuaProgramLogPath}, //
{"ProgramMaxPayloadSize", LuaProgramMaxPayloadSize}, //
{"ProgramMaxWorkers", LuaProgramMaxWorkers}, //
{"ProgramPidPath", LuaProgramPidPath}, //
{"ProgramPort", LuaProgramPort}, //
{"ProgramRedirect", LuaProgramRedirect}, //
{"ProgramTimeout", LuaProgramTimeout}, //
{"ProgramTrustedIp", LuaProgramTrustedIp}, // undocumented
{"ProgramUid", LuaProgramUid}, //
{"ProgramUniprocess", LuaProgramUniprocess}, //
{"Rand64", LuaRand64}, //
{"ReadWS", LuaReadWS}, // undocumented
{"Rdrand", LuaRdrand}, //
{"Rdseed", LuaRdseed}, //
{"Rdtsc", LuaRdtsc}, //
{"ResolveIp", LuaResolveIp}, //
{"Route", LuaRoute}, //
{"RouteHost", LuaRouteHost}, //
{"RoutePath", LuaRoutePath}, //
{"ServeAsset", LuaServeAsset}, //
{"ServeError", LuaServeError}, //
{"ServeIndex", LuaServeIndex}, //
{"ServeListing", LuaServeListing}, //
{"ServeRedirect", LuaServeRedirect}, //
{"ServeStatusz", LuaServeStatusz}, //
{"SetCookie", LuaSetCookie}, //
{"SetHeader", LuaSetHeader}, //
{"SetLogLevel", LuaSetLogLevel}, //
{"SetStatus", LuaSetStatus}, //
{"Sha1", LuaSha1}, //
{"Sha224", LuaSha224}, //
{"Sha256", LuaSha256}, //
{"Sha384", LuaSha384}, //
{"Sha512", LuaSha512}, //
{"Sleep", LuaSleep}, //
{"Slurp", LuaSlurp}, //
{"StoreAsset", LuaStoreAsset}, //
{"Uncompress", LuaUncompress}, //
{"Underlong", LuaUnderlong}, //
{"UpgradeWS", LuaUpgradeWS}, // undocumented
{"VisualizeControlCodes", LuaVisualizeControlCodes}, //
{"Write", LuaWrite}, //
{"bin", LuaBin}, //
{"hex", LuaHex}, //
{"oct", LuaOct}, //
#ifndef UNSECURE
{"AcquireToken", LuaAcquireToken}, //
{"Blackhole", LuaBlackhole}, // undocumented
{"CountTokens", LuaCountTokens}, //
{"EvadeDragnetSurveillance", LuaEvadeDragnetSurveillance}, //
{"GetSslIdentity", LuaGetSslIdentity}, //
{"ProgramCertificate", LuaProgramCertificate}, //
{"ProgramPrivateKey", LuaProgramPrivateKey}, //
{"ProgramSslCiphersuite", LuaProgramSslCiphersuite}, //
{"ProgramSslClientVerify", LuaProgramSslClientVerify}, //
{"ProgramSslFetchVerify", LuaProgramSslFetchVerify}, //
{"ProgramSslInit", LuaProgramSslInit}, //
{"ProgramSslPresharedKey", LuaProgramSslPresharedKey}, //
{"ProgramSslRequired", LuaProgramSslRequired}, //
{"ProgramSslTicketLifetime", LuaProgramSslTicketLifetime}, //
{"ProgramTokenBucket", LuaProgramTokenBucket}, //
#endif
// deprecated
{"GetPayload", LuaGetBody}, //
{"GetComment", LuaGetAssetComment}, //
{"GetVersion", LuaGetHttpVersion}, //
{"IsCompressed", LuaIsAssetCompressed}, //
{"GetLastModifiedTime", LuaGetAssetLastModifiedTime}, //
};
static const luaL_Reg kLuaLibs[] = {
{"argon2", luaopen_argon2}, //
{"lsqlite3", luaopen_lsqlite3}, //
{"maxmind", LuaMaxmind}, //
{"finger", LuaFinger}, //
{"path", LuaPath}, //
{"re", LuaRe}, //
{"unix", LuaUnix}, //
};
static void LuaSetArgv(lua_State *L) {
int i, j = -1;
lua_newtable(L);
lua_pushstring(L, __argv[0]);
lua_seti(L, -2, j++);
if (!interpretermode) {
lua_pushstring(L, "/zip/.init.lua");
lua_seti(L, -2, j++);
}
for (i = optind; i < __argc; ++i) {
lua_pushstring(L, __argv[i]);
lua_seti(L, -2, j++);
}
lua_pushvalue(L, -1);
lua_setglobal(L, "argv"); // deprecated
lua_setglobal(L, "arg");
}
static void LuaSetConstant(lua_State *L, const char *s, long x) {
lua_pushinteger(L, x);
lua_setglobal(L, s);
}
static void LuaStart(void) {
#ifndef STATIC
size_t i;
lua_State *L = GL = luaL_newstate();
g_lua_path_default = DEFAULTLUAPATH;
luaL_openlibs(L);
for (i = 0; i < ARRAYLEN(kLuaLibs); ++i) {
luaL_requiref(L, kLuaLibs[i].name, kLuaLibs[i].func, 1);
lua_pop(L, 1);
}
for (i = 0; i < ARRAYLEN(kLuaFuncs); ++i) {
lua_pushcfunction(L, kLuaFuncs[i].func);
lua_setglobal(L, kLuaFuncs[i].name);
}
LuaSetConstant(L, "kLogDebug", kLogDebug);
LuaSetConstant(L, "kLogVerbose", kLogVerbose);
LuaSetConstant(L, "kLogInfo", kLogInfo);
LuaSetConstant(L, "kLogWarn", kLogWarn);
LuaSetConstant(L, "kLogError", kLogError);
LuaSetConstant(L, "kLogFatal", kLogFatal);
LuaSetConstant(L, "kUrlPlus", kUrlPlus);
LuaSetConstant(L, "kUrlLatin1", kUrlLatin1);
// create a list of custom content types
lua_pushlightuserdata(L, (void *)&ctIdx); // push address as unique key
lua_newtable(L);
lua_settable(L, LUA_REGISTRYINDEX); // registry[&ctIdx] = {}
#endif
}
static bool ShouldAutocomplete(const char *s) {
int c, m, l, r;
l = 0;
r = ARRAYLEN(kDontAutoComplete) - 1;
while (l <= r) {
m = (l & r) + ((l ^ r) >> 1); // floor((a+b)/2)
c = strcmp(kDontAutoComplete[m], s);
if (c < 0) {
l = m + 1;
} else if (c > 0) {
r = m - 1;
} else {
return false;
}
}
return true;
}
static void HandleCompletions(const char *p, linenoiseCompletions *c) {
size_t i, j;
for (j = i = 0; i < c->len; ++i) {
if (ShouldAutocomplete(c->cvec[i])) {
c->cvec[j++] = c->cvec[i];
} else {
free(c->cvec[i]);
}
}
c->len = j;
}
static void LuaPrint(lua_State *L) {
int i, n;
char *b = 0;
n = lua_gettop(L);
if (n > 0) {
for (i = 1; i <= n; i++) {
if (i > 1) appendw(&b, '\t');
struct EncoderConfig conf = {
.maxdepth = 64,
.sorted = true,
.pretty = true,
.indent = " ",
};
LuaEncodeLuaData(L, &b, i, conf);
}
appendw(&b, '\n');
WRITE(1, b, appendz(b).i);
free(b);
}
}
static void EnableRawMode(void) {
if (lua_repl_isterminal) {
strace_enabled(-1);
linenoiseEnableRawMode(0);
strace_enabled(+1);
}
}
static void DisableRawMode(void) {
strace_enabled(-1);
linenoiseDisableRawMode();
strace_enabled(+1);
}
static int LuaInterpreter(lua_State *L) {
int i, n, sig, status;
const char *script;
if (optind < __argc) {
script = __argv[optind];
if (!strcmp(script, "-")) script = 0;
if ((status = luaL_loadfile(L, script)) == LUA_OK) {
lua_getglobal(L, "arg");
n = luaL_len(L, -1);
luaL_checkstack(L, n + 3, "too many script args");
for (i = 1; i <= n; i++) lua_rawgeti(L, -i, i);
lua_remove(L, -i); // remove arg table from stack
TRACE_BEGIN;
status = lua_runchunk(L, n, LUA_MULTRET);
TRACE_END;
}
return lua_report(L, status);
} else {
lua_repl_blocking = true;
lua_repl_completions_callback = HandleCompletions;
lua_initrepl(GL);
EnableRawMode();
for (;;) {
status = lua_loadline(L);
if (status == -1) break; // eof
if (status == -2) {
if (errno == EINTR) {
if ((sig = linenoiseGetInterrupt())) {
kill(0, sig);
}
}
fprintf(stderr, "i/o error: %m\n");
exit(1);
}
if (status == LUA_OK) {
TRACE_BEGIN;
status = lua_runchunk(GL, 0, LUA_MULTRET);
TRACE_END;
}
if (status == LUA_OK) {
LuaPrint(GL);
} else {
lua_report(GL, status);
}
}
DisableRawMode();
lua_freerepl();
lua_settop(GL, 0); // clear stack
if ((sig = linenoiseGetInterrupt())) {
raise(sig);
}
return status;
}
}
static void LuaDestroy(void) {
#ifndef STATIC
lua_State *L = GL;
lua_close(L);
#endif
}
static void MemDestroy(void) {
FreeAssets();
CollectGarbage();
inbuf.p = 0, inbuf.n = 0, inbuf.c = 0;
Free(&inbuf_actual.p), inbuf_actual.n = inbuf_actual.c = 0;
Free(&unmaplist.p), unmaplist.n = unmaplist.c = 0;
Free(&freelist.p), freelist.n = freelist.c = 0;
Free(&hdrbuf.p), hdrbuf.n = hdrbuf.c = 0;
Free(&servers.p), servers.n = 0;
Free(&ports.p), ports.n = 0;
Free(&ips.p), ips.n = 0;
Free(&cpm.outbuf);
FreeStrings(&stagedirs);
FreeStrings(&hidepaths);
Free(&cachedirective);
Free(&launchbrowser);
Free(&serverheader);
Free(&trustedips.p);
Free(&interfaces);
Free(&extrahdrs);
Free(&pidpath);
Free(&logpath);
Free(&brand);
Free(&polls);
}
static void LuaInit(void) {
#ifndef STATIC
lua_State *L = GL;
LuaSetArgv(L);
if (interpretermode) {
int rc = LuaInterpreter(L);
LuaDestroy();
MemDestroy();
if (IsModeDbg()) {
CheckForMemoryLeaks();
}
exit(rc);
}
if (LuaRunAsset("/.init.lua", true)) {
hasonhttprequest = IsHookDefined("OnHttpRequest");
hasonclientconnection = IsHookDefined("OnClientConnection");
hasonprocesscreate = IsHookDefined("OnProcessCreate");
hasonprocessdestroy = IsHookDefined("OnProcessDestroy");
hasonworkerstart = IsHookDefined("OnWorkerStart");
hasonworkerstop = IsHookDefined("OnWorkerStop");
hasonloglatency = IsHookDefined("OnLogLatency");
} else {
DEBUGF("(srvr) no /.init.lua defined");
}
#endif
}
static void LuaOnServerReload(bool reindex) {
#ifndef STATIC
if (!LuaRunAsset("/.reload.lua", false)) {
DEBUGF("(srvr) no /.reload.lua defined");
}
lua_State *L = GL;
lua_getglobal(L, "OnServerReload");
lua_pushboolean(L, reindex);
if (LuaCallWithTrace(L, 1, 0, NULL) != LUA_OK) {
LogLuaError("OnServerReload", lua_tostring(L, -1));
lua_pop(L, 1); // pop error
}
AssertLuaStackIsAt(L, 0);
#endif
}
static const char *DescribeClose(void) {
if (killed) return "killed";
if (meltdown) return "meltdown";
if (terminated) return "terminated";
if (connectionclose) return "connection closed";
return "destroyed";
}
static void LogClose(const char *reason) {
if (amtread || meltdown || killed) {
LockInc(&shared->c.fumbles);
INFOF("(stat) %s %s with %,ld unprocessed and %,d handled (%,d workers)",
DescribeClient(), reason, amtread, messageshandled, shared->workers);
} else {
DEBUGF("(stat) %s %s with %,d messages handled", DescribeClient(), reason,
messageshandled);
}
}
static ssize_t SendString(const char *s) {
size_t n;
ssize_t rc;
struct iovec iov;
n = strlen(s);
iov.iov_base = (void *)s;
iov.iov_len = n;
if (logmessages) {
LogMessage("sending", s, n);
}
for (;;) {
if ((rc = writer(client, &iov, 1)) != -1 || errno != EINTR) {
return rc;
}
errno = 0;
}
}
static ssize_t SendContinue(void) {
return SendString("\
HTTP/1.1 100 Continue\r\n\
\r\n");
}
static ssize_t SendTimeout(void) {
return SendString("\
HTTP/1.1 408 Request Timeout\r\n\
Connection: close\r\n\
Content-Length: 0\r\n\
\r\n");
}
static ssize_t SendServiceUnavailable(void) {
return SendString("\
HTTP/1.1 503 Service Unavailable\r\n\
Connection: close\r\n\
Content-Length: 0\r\n\
\r\n");
}
static ssize_t SendTooManyRequests(void) {
return SendString("\
HTTP/1.1 429 Too Many Requests\r\n\
Connection: close\r\n\
Content-Type: text/plain\r\n\
Content-Length: 22\r\n\
\r\n\
429 Too Many Requests\n");
}
static void EnterMeltdownMode(void) {
if (timespec_cmp(timespec_sub(timespec_real(), shared->lastmeltdown),
(struct timespec){1}) < 0) {
return;
}
WARNF("(srvr) server is melting down (%,d workers)", shared->workers);
LOGIFNEG1(kill(0, SIGUSR2));
shared->lastmeltdown = timespec_real();
++shared->c.meltdowns;
}
static char *HandlePayloadDisconnect(void) {
LockInc(&shared->c.payloaddisconnects);
LogClose("payload disconnect");
return ServeFailure(400, "Bad Request"); /* XXX */
}
static char *HandlePayloadDrop(void) {
LockInc(&shared->c.dropped);
LogClose(DescribeClose());
return ServeFailure(503, "Service Unavailable");
}
static char *HandleBadContentLength(void) {
LockInc(&shared->c.badlengths);
return ServeFailure(400, "Bad Content Length");
}
static char *HandleLengthRequired(void) {
LockInc(&shared->c.missinglengths);
return ServeFailure(411, "Length Required");
}
static char *HandleVersionNotSupported(void) {
LockInc(&shared->c.http12);
return ServeFailure(505, "HTTP Version Not Supported");
}
static char *HandleConnectRefused(void) {
LockInc(&shared->c.connectsrefused);
return ServeFailure(501, "Not Implemented");
}
static char *HandleExpectFailed(void) {
LockInc(&shared->c.expectsrefused);
return ServeFailure(417, "Expectation Failed");
}
static char *HandleHugePayload(void) {
LockInc(&shared->c.hugepayloads);
return ServeFailure(413, "Payload Too Large");
}
static char *HandleTransferRefused(void) {
LockInc(&shared->c.transfersrefused);
return ServeFailure(501, "Not Implemented");
}
static char *HandleMapFailed(struct Asset *a, int fd) {
LockInc(&shared->c.mapfails);
WARNF("(srvr) mmap(%`'s) error: %m", a->file->path);
close(fd);
return ServeError(500, "Internal Server Error");
}
static void LogAcceptError(const char *s) {
LockInc(&shared->c.accepterrors);
WARNF("(srvr) %s accept error: %s", DescribeServer(), s);
}
static char *HandleOpenFail(struct Asset *a) {
LockInc(&shared->c.openfails);
WARNF("(srvr) open(%`'s) error: %m", a->file->path);
if (errno == ENFILE) {
LockInc(&shared->c.enfiles);
return ServeError(503, "Service Unavailable");
} else if (errno == EMFILE) {
LockInc(&shared->c.emfiles);
return ServeError(503, "Service Unavailable");
} else {
return ServeError(500, "Internal Server Error");
}
}
static char *HandlePayloadReadError(void) {
if (errno == ECONNRESET) {
LockInc(&shared->c.readresets);
LogClose("payload reset");
return ServeFailure(400, "Bad Request"); /* XXX */
} else if (errno == EAGAIN || errno == EWOULDBLOCK) {
LockInc(&shared->c.readtimeouts);
LogClose("payload read timeout");
return ServeFailure(408, "Request Timeout");
} else {
LockInc(&shared->c.readerrors);
INFOF("(clnt) %s payload read error: %m", DescribeClient());
return ServeFailure(500, "Internal Server Error");
}
}
static void HandleForkFailure(void) {
LockInc(&shared->c.forkerrors);
LockInc(&shared->c.dropped);
EnterMeltdownMode();
SendServiceUnavailable();
close(client);
WARNF("(srvr) too many processes: %m");
}
static void HandleFrag(size_t got) {
LockInc(&shared->c.frags);
DEBUGF("(stat) %s fragged msg added %,ld bytes to %,ld byte buffer",
DescribeClient(), amtread, got);
}
static void HandleReload(void) {
LockInc(&shared->c.reloads);
LuaOnServerReload(Reindex());
invalidated = false;
}
static void HandleHeartbeat(void) {
size_t i;
UpdateCurrentDate(timespec_real());
Reindex();
getrusage(RUSAGE_SELF, &shared->server);
#ifndef STATIC
CallSimpleHookIfDefined("OnServerHeartbeat");
CollectGarbage();
#endif
for (i = 1; i < servers.n; ++i) {
if (polls[i].fd < 0) {
polls[i].fd = -polls[i].fd;
}
}
}
// returns 0 on success or response on error
static char *OpenAsset(struct Asset *a) {
int fd;
void *data;
size_t size;
struct stat *st;
if (a->file->st.st_size) {
size = a->file->st.st_size;
if (cpm.msg.method == kHttpHead) {
cpm.content = 0;
cpm.contentlength = size;
} else {
OpenAgain:
if ((fd = open(a->file->path.s, O_RDONLY)) != -1) {
data = mmap(0, size, PROT_READ, MAP_PRIVATE, fd, 0);
if (data != MAP_FAILED) {
LockInc(&shared->c.maps);
UnmapLater(fd, data, size);
cpm.content = data;
cpm.contentlength = size;
} else if ((st = _gc(malloc(sizeof(struct stat)))) &&
fstat(fd, st) != -1 && (data = malloc(st->st_size))) {
/* probably empty file or zipos handle */
LockInc(&shared->c.slurps);
FreeLater(data);
if (ReadAll(fd, data, st->st_size) != -1) {
cpm.content = data;
cpm.contentlength = st->st_size;
close(fd);
} else {
return HandleMapFailed(a, fd);
}
} else {
return HandleMapFailed(a, fd);
}
} else if (errno == EINTR) {
errno = 0;
goto OpenAgain;
} else {
return HandleOpenFail(a);
}
}
} else {
cpm.content = "";
cpm.contentlength = 0;
}
return 0;
}
static char *ServeServerOptions(void) {
char *p;
LockInc(&shared->c.serveroptions);
p = SetStatus(200, "OK");
#ifdef STATIC
p = stpcpy(p, "Allow: GET, HEAD, OPTIONS\r\n");
#else
p = stpcpy(p, "Accept: */*\r\n"
"Accept-Charset: utf-8,ISO-8859-1;q=0.7,*;q=0.5\r\n"
"Allow: GET, HEAD, POST, PUT, DELETE, OPTIONS\r\n");
#endif
return p;
}
static void SendContinueIfNeeded(void) {
if (cpm.msg.version >= 11 && HeaderEqualCase(kHttpExpect, "100-continue")) {
LockInc(&shared->c.continues);
SendContinue();
}
}
static char *ReadMore(void) {
size_t got;
ssize_t rc;
LockInc(&shared->c.frags);
if ((rc = reader(client, inbuf.p + amtread, inbuf.n - amtread)) != -1) {
if (!(got = rc)) return HandlePayloadDisconnect();
amtread += got;
} else if (errno == EINTR) {
LockInc(&shared->c.readinterrupts);
if (killed || ((meltdown || terminated) &&
timespec_cmp(timespec_sub(timespec_real(), startread),
(struct timespec){1}) >= 0)) {
return HandlePayloadDrop();
}
} else {
return HandlePayloadReadError();
}
return NULL;
}
static char *SynchronizeLength(void) {
char *p;
if (hdrsize + payloadlength > amtread) {
if (hdrsize + payloadlength > inbuf.n) return HandleHugePayload();
SendContinueIfNeeded();
while (amtread < hdrsize + payloadlength) {
if ((p = ReadMore())) return p;
}
}
cpm.msgsize = hdrsize + payloadlength;
return NULL;
}
static char *SynchronizeChunked(void) {
char *p;
ssize_t transferlength;
struct HttpUnchunker u = {0};
SendContinueIfNeeded();
while (!(transferlength = Unchunk(&u, inbuf.p + hdrsize, amtread - hdrsize,
&payloadlength))) {
if ((p = ReadMore())) return p;
}
if (transferlength == -1) return HandleHugePayload();
cpm.msgsize = hdrsize + transferlength;
return NULL;
}
static char *SynchronizeStream(void) {
int64_t cl;
if (HasHeader(kHttpTransferEncoding) &&
!HeaderEqualCase(kHttpTransferEncoding, "identity")) {
if (HeaderEqualCase(kHttpTransferEncoding, "chunked")) {
return SynchronizeChunked();
} else {
return HandleTransferRefused();
}
} else if (HasHeader(kHttpContentLength)) {
if ((cl = ParseContentLength(HeaderData(kHttpContentLength),
HeaderLength(kHttpContentLength))) != -1) {
payloadlength = cl;
return SynchronizeLength();
} else {
return HandleBadContentLength();
}
} else if (cpm.msg.method == kHttpPost || cpm.msg.method == kHttpPut) {
return HandleLengthRequired();
} else {
cpm.msgsize = hdrsize;
payloadlength = 0;
return NULL;
}
}
static void ParseRequestParameters(void) {
uint32_t ip;
FreeLater(ParseUrl(inbuf.p + cpm.msg.uri.a, cpm.msg.uri.b - cpm.msg.uri.a,
&url, kUrlPlus | kUrlLatin1));
if (!url.host.p) {
if (HasHeader(kHttpXForwardedHost) && //
!GetRemoteAddr(&ip, 0) && IsTrustedIp(ip)) {
FreeLater(ParseHost(HeaderData(kHttpXForwardedHost),
HeaderLength(kHttpXForwardedHost), &url));
} else if (HasHeader(kHttpHost)) {
FreeLater(
ParseHost(HeaderData(kHttpHost), HeaderLength(kHttpHost), &url));
} else {
FreeLater(ParseHost(DescribeServer(), -1, &url));
}
} else if (!url.path.n) {
url.path.p = "/";
url.path.n = 1;
}
if (!url.scheme.n) {
if (usingssl) {
url.scheme.p = "https";
url.scheme.n = 5;
} else {
url.scheme.p = "http";
url.scheme.n = 4;
}
}
}
static bool HasAtMostThisElement(int h, const char *s) {
size_t i, n;
struct HttpHeader *x;
if (HasHeader(h)) {
n = strlen(s);
if (!SlicesEqualCase(s, n, HeaderData(h), HeaderLength(h))) {
return false;
}
for (i = 0; i < cpm.msg.xheaders.n; ++i) {
x = cpm.msg.xheaders.p + i;
if (GetHttpHeader(inbuf.p + x->k.a, x->k.b - x->k.a) == h &&
!SlicesEqualCase(inbuf.p + x->v.a, x->v.b - x->v.a, s, n)) {
return false;
}
}
}
return true;
}
static char *HandleRequest(void) {
char *p;
if (cpm.msg.version == 11) {
LockInc(&shared->c.http11);
} else if (cpm.msg.version < 10) {
LockInc(&shared->c.http09);
} else if (cpm.msg.version == 10) {
LockInc(&shared->c.http10);
} else {
return HandleVersionNotSupported();
}
if ((p = SynchronizeStream())) return p;
if (logbodies) LogBody("received", inbuf.p + hdrsize, payloadlength);
if (cpm.msg.version < 11 || HeaderEqualCase(kHttpConnection, "close")) {
connectionclose = true;
}
if (cpm.msg.method == kHttpOptions &&
SlicesEqual(inbuf.p + cpm.msg.uri.a, cpm.msg.uri.b - cpm.msg.uri.a, "*",
1)) {
return ServeServerOptions();
}
if (cpm.msg.method == kHttpConnect) {
return HandleConnectRefused();
}
if (!HasAtMostThisElement(kHttpExpect, "100-continue")) {
return HandleExpectFailed();
}
ParseRequestParameters();
if (!url.host.n || !url.path.n || url.path.p[0] != '/' ||
!IsAcceptablePath(url.path.p, url.path.n) ||
!IsAcceptableHost(url.host.p, url.host.n) ||
!IsAcceptablePort(url.port.p, url.port.n)) {
free(url.params.p);
LockInc(&shared->c.urisrefused);
return ServeFailure(400, "Bad URI");
}
INFOF("(req) received %s HTTP%02d %.*s %s %`'.*s %`'.*s", DescribeClient(),
cpm.msg.version, cpm.msg.xmethod.b - cpm.msg.xmethod.a,
inbuf.p + cpm.msg.xmethod.a, FreeLater(EncodeUrl(&url, 0)),
HeaderLength(kHttpReferer), HeaderData(kHttpReferer),
HeaderLength(kHttpUserAgent), HeaderData(kHttpUserAgent));
if (HasHeader(kHttpContentType) &&
IsMimeType(HeaderData(kHttpContentType), HeaderLength(kHttpContentType),
"application/x-www-form-urlencoded")) {
FreeLater(ParseParams(inbuf.p + hdrsize, payloadlength, &url.params));
}
FreeLater(url.params.p);
#ifndef STATIC
if (hasonhttprequest) return LuaOnHttpRequest();
#endif
return Route(url.host.p, url.host.n, url.path.p, url.path.n);
}
static char *Route(const char *host, size_t hostlen, const char *path,
size_t pathlen) {
char *p;
// reset the redirect loop check, as it can only be looping inside
// this function (as it always serves something); otherwise
// successful RoutePath and Route may fail with "508 loop detected"
cpm.loops.n = 0;
if (hostlen && (p = RouteHost(host, hostlen, path, pathlen))) {
return p;
}
if (SlicesEqual(path, pathlen, "/", 1)) {
if ((p = ServeIndex("/", 1))) return p;
return ServeListing();
} else if ((p = RoutePath(path, pathlen))) {
return p;
} else if (SlicesEqual(path, pathlen, "/statusz", 8)) {
return ServeStatusz();
} else {
LockInc(&shared->c.notfounds);
return ServeErrorWithPath(404, "Not Found", path, pathlen);
}
}
static char *RoutePath(const char *path, size_t pathlen) {
int m;
long r;
struct Asset *a;
DEBUGF("(srvr) RoutePath(%`'.*s)", pathlen, path);
if ((a = GetAsset(path, pathlen))) {
// only allow "read other" permissions for security
// and consistency with handling of "external" files
// in this and other webservers
if ((m = GetMode(a)) & 0004) {
if (!S_ISDIR(m)) {
return HandleAsset(a, path, pathlen);
} else {
return HandleFolder(path, pathlen);
}
} else {
LockInc(&shared->c.forbiddens);
WARNF("(srvr) asset %`'.*s %#o isn't readable", pathlen, path, m);
return ServeErrorWithPath(403, "Forbidden", path, pathlen);
}
} else if ((r = FindRedirect(path, pathlen)) != -1) {
return HandleRedirect(redirects.p + r);
} else {
return NULL;
}
}
static char *RouteHost(const char *host, size_t hostlen, const char *path,
size_t pathlen) {
size_t hn, hm;
char *hp, *p, b[96];
if (hostlen) {
hn = 1 + hostlen + url.path.n;
hm = 3 + 1 + hn;
hp = hm <= sizeof(b) ? b : FreeLater(xmalloc(hm));
hp[0] = '/';
mempcpy(mempcpy(hp + 1, host, hostlen), path, pathlen);
if ((p = RoutePath(hp, hn))) return p;
if (!isdigit(host[0])) {
if (hostlen > 4 &&
READ32LE(host) == ('w' | 'w' << 8 | 'w' << 16 | '.' << 24)) {
mempcpy(mempcpy(hp + 1, host + 4, hostlen - 4), path, pathlen);
if ((p = RoutePath(hp, hn - 4))) return p;
} else {
mempcpy(mempcpy(mempcpy(hp + 1, "www.", 4), host, hostlen), path,
pathlen);
if ((p = RoutePath(hp, hn + 4))) return p;
}
}
}
return NULL;
}
static inline bool IsLua(struct Asset *a) {
size_t n;
const char *p;
if (a->file && a->file->path.n >= 4 &&
READ32LE(a->file->path.s + a->file->path.n - 4) ==
('.' | 'l' << 8 | 'u' << 16 | 'a' << 24)) {
return true;
}
p = ZIP_CFILE_NAME(zmap + a->cf);
n = ZIP_CFILE_NAMESIZE(zmap + a->cf);
return n > 4 &&
READ32LE(p + n - 4) == ('.' | 'l' << 8 | 'u' << 16 | 'a' << 24);
}
static char *HandleAsset(struct Asset *a, const char *path, size_t pathlen) {
char *p;
#ifndef STATIC
if (IsLua(a)) return ServeLua(a, path, pathlen);
#endif
if (cpm.msg.method == kHttpGet || cpm.msg.method == kHttpHead) {
LockInc(&shared->c.staticrequests);
p = ServeAsset(a, path, pathlen);
if (!cpm.gotxcontenttypeoptions) {
p = stpcpy(p, "X-Content-Type-Options: nosniff\r\n");
}
return p;
} else {
return BadMethod();
}
}
static const char *GetContentType(struct Asset *a, const char *path, size_t n) {
const char *r;
if (a->file && (r = GetContentTypeExt(a->file->path.s, a->file->path.n))) {
return r;
}
return firstnonnull(
GetContentTypeExt(path, n),
firstnonnull(GetContentTypeExt(ZIP_CFILE_NAME(zmap + a->cf),
ZIP_CFILE_NAMESIZE(zmap + a->cf)),
a->istext ? "text/plain" : "application/octet-stream"));
}
static bool IsNotModified(struct Asset *a) {
if (cpm.msg.version < 10) return false;
if (!HasHeader(kHttpIfModifiedSince)) return false;
return a->lastmodified <=
ParseHttpDateTime(HeaderData(kHttpIfModifiedSince),
HeaderLength(kHttpIfModifiedSince));
}
static char *ServeAsset(struct Asset *a, const char *path, size_t pathlen) {
char *p;
const char *ct;
ct = GetContentType(a, path, pathlen);
if (IsNotModified(a)) {
LockInc(&shared->c.notmodifieds);
p = SetStatus(304, "Not Modified");
} else {
if (!a->file) {
cpm.content = (char *)ZIP_LFILE_CONTENT(zmap + a->lf);
cpm.contentlength = GetZipCfileCompressedSize(zmap + a->cf);
} else if ((p = OpenAsset(a))) {
return p;
}
if (IsCompressed(a)) {
if (ClientAcceptsGzip()) {
p = ServeAssetPrecompressed(a);
} else {
p = ServeAssetDecompressed(a);
}
} else if (cpm.msg.version >= 11 && HasHeader(kHttpRange)) {
p = ServeAssetRange(a);
} else if (!a->file) {
LockInc(&shared->c.identityresponses);
DEBUGF("(zip) ServeAssetZipIdentity(%`'s)", ct);
if (Verify(cpm.content, cpm.contentlength,
ZIP_LFILE_CRC32(zmap + a->lf))) {
p = SetStatus(200, "OK");
} else {
return ServeError(500, "Internal Server Error");
}
} else if (!IsTiny() && cpm.msg.method != kHttpHead && !IsSslCompressed() &&
ClientAcceptsGzip() && !ShouldAvoidGzip() &&
!(a->file &&
IsNoCompressExt(a->file->path.s, a->file->path.n)) &&
((cpm.contentlength >= 100 && startswithi(ct, "text/")) ||
(cpm.contentlength >= 1000 &&
MeasureEntropy(cpm.content, 1000) < 7))) {
VERBOSEF("serving compressed asset");
p = ServeAssetCompressed(a);
} else {
p = ServeAssetIdentity(a, ct);
}
}
p = AppendContentType(p, ct);
p = stpcpy(p, "Vary: Accept-Encoding\r\n");
p = AppendHeader(p, "Last-Modified", a->lastmodifiedstr);
if (cpm.msg.version >= 11) {
if (!cpm.gotcachecontrol) {
p = AppendCache(p, cacheseconds, cachedirective);
}
if (!IsCompressed(a)) {
p = stpcpy(p, "Accept-Ranges: bytes\r\n");
}
}
return p;
}
static char *SetStatus(unsigned code, const char *reason) {
if (cpm.msg.version == 10) {
if (code == 307) code = 302;
if (code == 308) code = 301;
}
cpm.statuscode = code;
cpm.hascontenttype = false;
// reset, as the headers are reset.
// istext is `true`, as the default content type
// is text/html, which will be set later
cpm.istext = true;
cpm.gotxcontenttypeoptions = 0;
cpm.gotcachecontrol = 0;
cpm.referrerpolicy = 0;
cpm.branded = 0;
stpcpy(hdrbuf.p, "HTTP/1.0 000 ");
hdrbuf.p[7] += cpm.msg.version & 1;
hdrbuf.p[9] += code / 100;
hdrbuf.p[10] += code / 10 % 10;
hdrbuf.p[11] += code % 10;
VERBOSEF("(rsp) %d %s", code, reason);
return AppendCrlf(stpcpy(hdrbuf.p + 13, reason));
}
static inline bool MustNotIncludeMessageBody(void) { /* RFC2616 § 4.4 */
return cpm.msg.method == kHttpHead ||
(100 <= cpm.statuscode && cpm.statuscode <= 199) ||
cpm.statuscode == 204 || cpm.statuscode == 304;
}
static bool TransmitResponse(char *p) {
int iovlen;
struct iovec iov[4];
long actualcontentlength;
if (cpm.msg.version >= 10) {
actualcontentlength = cpm.contentlength;
if (cpm.gzipped) {
actualcontentlength += sizeof(kGzipHeader) + sizeof(gzip_footer);
p = stpcpy(p, "Content-Encoding: gzip\r\n");
}
p = AppendContentLength(p, actualcontentlength);
p = AppendCrlf(p);
CHECK_LE(p - hdrbuf.p, hdrbuf.n);
if (logmessages) {
LogMessage("sending", hdrbuf.p, p - hdrbuf.p);
}
iov[0].iov_base = hdrbuf.p;
iov[0].iov_len = p - hdrbuf.p;
iovlen = 1;
if (!MustNotIncludeMessageBody()) {
if (cpm.gzipped) {
iov[iovlen].iov_base = (void *)kGzipHeader;
iov[iovlen].iov_len = sizeof(kGzipHeader);
++iovlen;
}
iov[iovlen].iov_base = cpm.content;
iov[iovlen].iov_len = cpm.contentlength;
++iovlen;
if (cpm.gzipped) {
iov[iovlen].iov_base = gzip_footer;
iov[iovlen].iov_len = sizeof(gzip_footer);
++iovlen;
}
}
} else {
iov[0].iov_base = cpm.content;
iov[0].iov_len = cpm.contentlength;
iovlen = 1;
}
Send(iov, iovlen);
LockInc(&shared->c.messageshandled);
++messageshandled;
return true;
}
static bool StreamResponse(char *p) {
int rc;
struct iovec iov[6];
char *s, chunkbuf[23];
assert(!MustNotIncludeMessageBody());
if (cpm.msg.version >= 11) {
p = stpcpy(p, "Transfer-Encoding: chunked\r\n");
} else {
assert(connectionclose);
}
p = AppendCrlf(p);
CHECK_LE(p - hdrbuf.p, hdrbuf.n);
if (logmessages) {
LogMessage("sending", hdrbuf.p, p - hdrbuf.p);
}
bzero(iov, sizeof(iov));
if (cpm.msg.version >= 10) {
iov[0].iov_base = hdrbuf.p;
iov[0].iov_len = p - hdrbuf.p;
}
if (cpm.msg.version >= 11) {
iov[5].iov_base = "\r\n";
iov[5].iov_len = 2;
}
for (;;) {
iov[2].iov_base = 0;
iov[2].iov_len = 0;
iov[3].iov_base = 0;
iov[3].iov_len = 0;
iov[4].iov_base = 0;
iov[4].iov_len = 0;
if ((rc = cpm.generator(iov + 2)) <= 0) break;
if (cpm.msg.version >= 11) {
s = chunkbuf;
s += uint64toarray_radix16(rc, s);
s = AppendCrlf(s);
iov[1].iov_base = chunkbuf;
iov[1].iov_len = s - chunkbuf;
}
if (Send(iov, 6) == -1) break;
iov[0].iov_base = 0;
iov[0].iov_len = 0;
}
if (rc != -1) {
if (cpm.msg.version >= 11) {
iov[0].iov_base = "0\r\n\r\n";
iov[0].iov_len = 5;
Send(iov, 1);
}
} else {
connectionclose = true;
}
return true;
}
static bool StreamWS(char *p) {
ssize_t rc;
struct iovec iov[4];
char *s, wshdr[10], *extlen;
p = AppendCrlf(p);
CHECK_LE(p - hdrbuf.p, hdrbuf.n);
if (logmessages) {
LogMessage("sending", hdrbuf.p, p - hdrbuf.p);
}
iov[0].iov_base = hdrbuf.p;
iov[0].iov_len = p - hdrbuf.p;
Send(iov, 1);
bzero(iov, sizeof(iov));
iov[0].iov_base = wshdr;
wshdr[0] = 0x1 | (0x1 << 7);
extlen = &wshdr[2];
cpm.isyielding = 2; // skip first YieldGenerator
for (;;) {
if ((rc = cpm.generator(iov + 1)) <= 0) break;
if (rc < 126) {
wshdr[1] = rc;
iov[0].iov_len = 2;
} else if (rc <= 0xFFFF) {
wshdr[1] = 126;
*(uint16_t *)extlen = htobe16(rc);
iov[0].iov_len = 4;
} else {
wshdr[1] = 127;
*(uint64_t *)extlen = htobe64(rc);
iov[0].iov_len = 10;
}
if (Send(iov, 4) == -1) break;
}
wshdr[0] = 0x8 | (1 << 7);
wshdr[1] = 0;
iov[0].iov_len = 2;
Send(iov, 1);
connectionclose = true;
return true;
}
static bool HandleMessageActual(void) {
int rc;
long reqtime, contime;
char *p;
struct timespec now;
if ((rc = ParseHttpMessage(&cpm.msg, inbuf.p, amtread)) != -1) {
if (!rc) return false;
hdrsize = rc;
if (logmessages) {
LogMessage("received", inbuf.p, hdrsize);
}
p = HandleRequest();
} else {
LockInc(&shared->c.badmessages);
connectionclose = true;
if ((p = DumpHexc(inbuf.p, MIN(amtread, 256), 0))) {
INFOF("(clnt) %s sent garbage %s", DescribeClient(), p);
}
return true;
}
if (!cpm.msgsize) {
amtread = 0;
connectionclose = true;
LockInc(&shared->c.synchronizationfailures);
DEBUGF("(clnt) could not synchronize message stream");
}
if (cpm.msg.version >= 10) {
p = AppendCrlf(stpcpy(stpcpy(p, "Date: "), shared->currentdate));
if (!cpm.branded) p = stpcpy(p, serverheader);
if (extrahdrs) p = stpcpy(p, extrahdrs);
if (connectionclose) {
p = stpcpy(p, "Connection: close\r\n");
} else if (timeout.tv_sec < 0 && cpm.msg.version >= 11) {
p = stpcpy(p, "Connection: keep-alive\r\n");
}
}
// keep content-type update *before* referrerpolicy
// https://datatracker.ietf.org/doc/html/rfc2616#section-7.2.1
if (!cpm.hascontenttype && cpm.contentlength > 0) {
p = AppendContentType(p, "text/html");
}
if (cpm.referrerpolicy) {
p = stpcpy(p, "Referrer-Policy: ");
p = stpcpy(p, cpm.referrerpolicy);
p = stpcpy(p, "\r\n");
}
if (loglatency || LOGGABLE(kLogDebug) || hasonloglatency) {
now = timespec_real();
reqtime = timespec_tomicros(timespec_sub(now, startrequest));
contime = timespec_tomicros(timespec_sub(now, startconnection));
if (hasonloglatency) LuaOnLogLatency(reqtime, contime);
if (loglatency || LOGGABLE(kLogDebug))
LOGF(kLogDebug, "(stat) %`'.*s latency r: %,ldµs c: %,ldµs",
cpm.msg.uri.b - cpm.msg.uri.a, inbuf.p + cpm.msg.uri.a, reqtime,
contime);
}
if (!cpm.generator) {
return TransmitResponse(p);
} else if (cpm.iswebsocket) {
return StreamWS(p);
} else {
return StreamResponse(p);
}
}
static bool HandleMessage(void) {
bool r;
ishandlingrequest = true;
r = HandleMessageActual();
ishandlingrequest = false;
return r;
}
static void InitRequest(void) {
assert(!cpm.outbuf);
bzero(&cpm, sizeof(cpm));
}
static bool IsSsl(unsigned char c) {
if (c == 22) return true;
if (!(c & 128)) return false;
/* RHEL5 sends SSLv2 hello but supports TLS */
DEBUGF("(ssl) %s SSLv2 hello D:", DescribeClient());
return true;
}
static void HandleMessages(void) {
bool once;
ssize_t rc;
size_t got;
(void)once;
for (once = false;;) {
InitRequest();
startread = timespec_real();
for (;;) {
if (!cpm.msg.i && amtread) {
startrequest = timespec_real();
if (HandleMessage()) break;
}
if ((rc = reader(client, inbuf.p + amtread, inbuf.n - amtread)) != -1) {
startrequest = timespec_real();
got = rc;
amtread += got;
if (amtread) {
#ifndef UNSECURE
if (!once) {
once = true;
if (!unsecure) {
if (IsSsl(inbuf.p[0])) {
if (TlsSetup()) {
continue;
} else {
return;
}
} else if (requiressl) {
INFOF("(clnt) %s didn't send an ssl hello", DescribeClient());
return;
} else {
WipeServingKeys();
}
}
}
#endif
DEBUGF("(stat) %s read %,zd bytes", DescribeClient(), got);
if (HandleMessage()) {
break;
} else if (got) {
HandleFrag(got);
}
}
if (!got) {
NotifyClose();
LogClose("disconnect");
return;
}
} else if (errno == EINTR) {
LockInc(&shared->c.readinterrupts);
errno = 0;
} else if (errno == EAGAIN) {
LockInc(&shared->c.readtimeouts);
if (amtread) SendTimeout();
NotifyClose();
LogClose("read timeout");
return;
} else if (errno == ECONNRESET) {
LockInc(&shared->c.readresets);
LogClose("read reset");
return;
} else {
LockInc(&shared->c.readerrors);
if (errno == EBADF) { // don't warn on close/bad fd
LogClose("read badf");
} else {
WARNF("(clnt) %s read error: %m", DescribeClient());
}
return;
}
if (killed || (terminated && !amtread) ||
(meltdown &&
(!amtread || timespec_cmp(timespec_sub(timespec_real(), startread),
(struct timespec){1}) >= 0))) {
if (amtread) {
LockInc(&shared->c.dropped);
SendServiceUnavailable();
}
NotifyClose();
LogClose(DescribeClose());
return;
}
if (invalidated) {
HandleReload();
}
}
if (cpm.msgsize == amtread) {
amtread = 0;
if (killed) {
LogClose(DescribeClose());
return;
} else if (connectionclose || terminated || meltdown) {
NotifyClose();
LogClose(DescribeClose());
return;
}
} else {
CHECK_LT(cpm.msgsize, amtread);
LockInc(&shared->c.pipelinedrequests);
DEBUGF("(stat) %,ld pipelinedrequest bytes", amtread - cpm.msgsize);
memmove(inbuf.p, inbuf.p + cpm.msgsize, amtread - cpm.msgsize);
amtread -= cpm.msgsize;
if (killed) {
LogClose(DescribeClose());
return;
} else if (connectionclose) {
NotifyClose();
LogClose(DescribeClose());
return;
}
}
CollectGarbage();
if (invalidated) {
HandleReload();
}
}
}
static void CloseServerFds(void) {
size_t i;
for (i = 0; i < servers.n; ++i) {
close(servers.p[i].fd);
}
}
static int ExitWorker(void) {
if (IsModeDbg() && !sandboxed) {
isexitingworker = true;
return eintr();
}
if (monitortty) {
terminatemonitor = true;
if (monitorth) {
pthread_join(monitorth, 0);
monitorth = 0;
}
}
LuaDestroy();
_Exit(0);
}
static void UnveilRedbean(void) {
size_t i;
for (i = 0; i < stagedirs.n; ++i) {
unveil(stagedirs.p[i].s, "r");
}
unveil(0, 0);
}
static int EnableSandbox(void) {
__pledge_mode = PLEDGE_PENALTY_RETURN_EPERM | PLEDGE_STDERR_LOGGING;
switch (sandboxed) {
case 0:
return 0;
case 1: // -S
DEBUGF("(stat) applying '%s' sandbox policy", "online");
UnveilRedbean();
return pledge("stdio rpath inet dns id", 0);
case 2: // -SS
DEBUGF("(stat) applying '%s' sandbox policy", "offline");
UnveilRedbean();
return pledge("stdio rpath id", 0);
default: // -SSS
DEBUGF("(stat) applying '%s' sandbox policy", "contained");
UnveilRedbean();
return pledge("stdio", 0);
}
}
static void *MemoryMonitor(void *arg) {
static struct termios oldterm;
static int tty;
sigset_t ss;
bool ok;
size_t intervals;
struct winsize ws;
unsigned char rez;
struct termios term;
char *b, *addr;
struct MemoryInterval *mi, *mi2;
long i, j, gen, pages;
int rc, id, color, color2, workers;
id = atomic_load_explicit(&shared->workers, memory_order_relaxed);
DEBUGF("(memv) started for pid %d on tid %d", getpid(), gettid());
sigemptyset(&ss);
sigaddset(&ss, SIGHUP);
sigaddset(&ss, SIGINT);
sigaddset(&ss, SIGQUIT);
sigaddset(&ss, SIGTERM);
sigaddset(&ss, SIGPIPE);
sigaddset(&ss, SIGUSR1);
sigaddset(&ss, SIGUSR2);
sigprocmask(SIG_BLOCK, &ss, 0);
pthread_spin_lock(&shared->montermlock);
if (!id) {
if ((tty = open(monitortty, O_RDWR | O_NOCTTY)) != -1) {
tcgetattr(tty, &oldterm);
term = oldterm;
term.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
term.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
term.c_oflag |= OPOST | ONLCR;
term.c_iflag |= IUTF8;
term.c_cflag |= CS8;
term.c_cc[VMIN] = 1;
term.c_cc[VTIME] = 0;
tcsetattr(tty, TCSANOW, &term);
WRITE(tty, "\e[?25l", 6);
}
}
pthread_spin_unlock(&shared->montermlock);
if (tty != -1) {
for (gen = 0, mi = 0, b = 0; !terminatemonitor;) {
workers = atomic_load_explicit(&shared->workers, memory_order_relaxed);
if (id) id = MAX(1, MIN(id, workers));
if (!id && workers) {
usleep(50000);
continue;
}
++gen;
intervals = atomic_load_explicit(&_mmi.i, memory_order_relaxed);
if ((mi2 = realloc(mi, (intervals += 3) * sizeof(*mi)))) {
mi = mi2;
mi[0].x = (intptr_t)__executable_start >> 16;
mi[0].size = _etext - __executable_start;
mi[0].flags = 0;
mi[1].x = (intptr_t)_etext >> 16;
mi[1].size = _edata - _etext;
mi[1].flags = 0;
mi[2].x = (intptr_t)_edata >> 16;
mi[2].size = _end - _edata;
mi[2].flags = 0;
__mmi_lock();
if (_mmi.i == intervals - 3) {
memcpy(mi + 3, _mmi.p, _mmi.i * sizeof(*mi));
ok = true;
} else {
ok = false;
}
__mmi_unlock();
if (!ok) {
VERBOSEF("(memv) retrying due to contention on mmap table");
continue;
}
ws.ws_col = 80;
ws.ws_row = 40;
tcgetwinsize(tty, &ws);
appendr(&b, 0);
appends(&b, "\e[H\e[1m");
for (i = 0; i < intervals; ++i) {
addr = (char *)((int64_t)((uint64_t)mi[i].x << 32) >> 16);
color = 0;
appendf(&b, "\e[0m%lx", addr);
int pagesz = getauxval(AT_PAGESZ);
pages = (mi[i].size + pagesz - 1) / pagesz;
for (j = 0; j < pages; ++j) {
rc = mincore(addr + j * pagesz, pagesz, &rez);
if (!rc) {
if (rez & 1) {
if (mi[i].flags & MAP_SHARED) {
color2 = 105;
} else {
color2 = 42;
}
} else {
color2 = 41;
}
} else {
errno = 0;
color2 = 0;
}
if (color != color2) {
color = color2;
appendf(&b, "\e[%dm", color);
}
if (mi[i].flags & MAP_ANONYMOUS) {
appendw(&b, ' ');
} else {
appendw(&b, '/');
}
}
}
appendf(&b,
"\e[0m ID=%d PID=%d WS=%dx%d WORKERS=%d MODE=" MODE
" GEN=%ld\e[J",
id, getpid(), ws.ws_col, ws.ws_row, workers, gen);
pthread_spin_lock(&shared->montermlock);
WRITE(tty, b, appendz(b).i);
appendr(&b, 0);
usleep(MONITOR_MICROS);
pthread_spin_unlock(&shared->montermlock);
} else {
// running out of memory temporarily is a real possibility here
// the right thing to do, is stand aside and let lua try to fix
WARNF("(memv) we require more vespene gas");
usleep(MONITOR_MICROS);
}
}
if (!id) {
appendr(&b, 0);
appends(&b, "\e[H\e[J\e[?25h");
WRITE(tty, b, appendz(b).i);
tcsetattr(tty, TCSANOW, &oldterm);
}
DEBUGF("(memv) exiting...");
close(tty);
free(mi);
free(b);
}
DEBUGF("(memv) done");
return 0;
}
static void MonitorMemory(void) {
errno_t err;
if ((err = pthread_create(&monitorth, 0, MemoryMonitor, 0))) {
WARNF("(memv) failed to start memory monitor %s", strerror(err));
}
}
static int HandleConnection(size_t i) {
uint32_t ip;
int pid, tok, rc = 0;
clientaddrsize = sizeof(clientaddr);
if ((client = accept4(servers.p[i].fd, (struct sockaddr *)&clientaddr,
&clientaddrsize, SOCK_CLOEXEC)) != -1) {
LockInc(&shared->c.accepts);
GetClientAddr(&ip, 0);
if (tokenbucket.cidr && tokenbucket.reject >= 0) {
if (!IsTrustedIp(ip)) {
tok = AcquireToken(tokenbucket.b, ip, tokenbucket.cidr);
if (tok <= tokenbucket.ban && tokenbucket.ban >= 0) {
WARNF("(token) banning %hhu.%hhu.%hhu.%hhu who only has %d tokens",
ip >> 24, ip >> 16, ip >> 8, ip, tok);
LockInc(&shared->c.bans);
Blackhole(ip);
close(client);
return 0;
} else if (tok <= tokenbucket.ignore && tokenbucket.ignore >= 0) {
DEBUGF("(token) ignoring %hhu.%hhu.%hhu.%hhu who only has %d tokens",
ip >> 24, ip >> 16, ip >> 8, ip, tok);
LockInc(&shared->c.ignores);
close(client);
return 0;
} else if (tok < tokenbucket.reject) {
WARNF("(token) rejecting %hhu.%hhu.%hhu.%hhu who only has %d tokens",
ip >> 24, ip >> 16, ip >> 8, ip, tok);
LockInc(&shared->c.rejects);
SendTooManyRequests();
close(client);
return 0;
} else {
DEBUGF("(token) %hhu.%hhu.%hhu.%hhu has %d tokens", ip >> 24,
ip >> 16, ip >> 8, ip, tok - 1);
}
} else {
DEBUGF("(token) won't acquire token for trusted ip %hhu.%hhu.%hhu.%hhu",
ip >> 24, ip >> 16, ip >> 8, ip);
}
} else {
DEBUGF("(token) can't acquire accept() token for client");
}
startconnection = timespec_real();
if (UNLIKELY(maxworkers) && shared->workers >= maxworkers) {
EnterMeltdownMode();
SendServiceUnavailable();
close(client);
return 0;
}
VERBOSEF("(srvr) accept %s via %s", DescribeClient(), DescribeServer());
messageshandled = 0;
if (hasonclientconnection && LuaOnClientConnection()) {
close(client);
return 0;
}
if (uniprocess) {
pid = -1;
connectionclose = true;
} else {
switch ((pid = fork())) {
case 0:
if (!IsTiny() && monitortty) {
MonitorMemory();
}
meltdown = false;
__isworker = true;
connectionclose = false;
if (!IsTiny() && systrace) {
kStartTsc = rdtsc();
}
TRACE_BEGIN;
if (sandboxed) {
CHECK_NE(-1, EnableSandbox());
}
if (hasonworkerstart) {
CallSimpleHook("OnWorkerStart");
}
break;
case -1:
HandleForkFailure();
return 0;
default:
LockInc(&shared->workers);
close(client);
ReseedRng(&rng, "parent");
if (hasonprocesscreate) {
LuaOnProcessCreate(pid);
}
return 0;
}
}
if (!pid && !IsWindows()) {
CloseServerFds();
}
HandleMessages();
DEBUGF("(stat) %s closing after %,ldµs", DescribeClient(),
timespec_tomicros(timespec_sub(timespec_real(), startconnection)));
if (!pid) {
if (hasonworkerstop) {
CallSimpleHook("OnWorkerStop");
}
rc = ExitWorker();
} else {
close(client);
oldin.p = 0;
oldin.n = 0;
if (inbuf.c) {
inbuf.p -= inbuf.c;
inbuf.n += inbuf.c;
inbuf.c = 0;
}
#ifndef UNSECURE
if (usingssl) {
usingssl = false;
reader = read;
writer = WritevAll;
mbedtls_ssl_session_reset(&ssl);
}
#endif
}
CollectGarbage();
} else {
if (errno == EINTR || errno == EAGAIN) {
LockInc(&shared->c.acceptinterrupts);
} else if (errno == ENFILE) {
LockInc(&shared->c.enfiles);
LogAcceptError("enfile: too many open files");
meltdown = true;
} else if (errno == EMFILE) {
LockInc(&shared->c.emfiles);
LogAcceptError("emfile: ran out of open file quota");
meltdown = true;
} else if (errno == ENOMEM) {
LockInc(&shared->c.enomems);
LogAcceptError("enomem: ran out of memory");
meltdown = true;
} else if (errno == ENOBUFS) {
LockInc(&shared->c.enobufs);
LogAcceptError("enobuf: ran out of buffer");
meltdown = true;
} else if (errno == ENONET) {
LockInc(&shared->c.enonets);
LogAcceptError("enonet: network gone");
polls[i].fd = -polls[i].fd;
} else if (errno == ENETDOWN) {
LockInc(&shared->c.enetdowns);
LogAcceptError("enetdown: network down");
polls[i].fd = -polls[i].fd;
} else if (errno == ECONNABORTED) {
LockInc(&shared->c.accepterrors);
LockInc(&shared->c.acceptresets);
WARNF("(srvr) %s accept error: %s", DescribeServer(),
"acceptreset: connection reset before accept");
} else if (errno == ENETUNREACH || errno == EHOSTUNREACH ||
errno == EOPNOTSUPP || errno == ENOPROTOOPT || errno == EPROTO) {
LockInc(&shared->c.accepterrors);
LockInc(&shared->c.acceptflakes);
WARNF("(srvr) accept error: %s ephemeral accept error: %m",
DescribeServer());
} else {
WARNF("(srvr) %s accept error: %m", DescribeServer());
}
errno = 0;
}
return rc;
}
static void MakeExecutableModifiable(void) {
#ifdef __x86_64__
int ft;
if (!(SUPPORT_VECTOR & (_HOSTMETAL | _HOSTWINDOWS | _HOSTXNU))) return;
if (IsWindows()) return; // TODO
if (IsOpenbsd()) return; // TODO
if (IsNetbsd()) return; // TODO
if (endswith(zpath, ".com.dbg")) return;
close(zfd);
ft = ftrace_enabled(0);
if ((zfd = __open_executable()) == -1) {
WARNF("(srvr) can't open executable for modification: %m");
}
if (ft > 0) {
__ftrace = 0;
ftrace_install();
ftrace_enabled(ft);
}
#else
// TODO
#endif
}
static int HandleReadline(void) {
int status;
lua_State *L = GL;
for (;;) {
status = lua_loadline(L);
if (status < 0) {
if (status == -1) {
OnTerm(SIGHUP); // eof
VERBOSEF("(repl) eof");
return -1;
} else if (errno == EINTR) {
errno = 0;
VERBOSEF("(repl) interrupt");
shutdownsig = SIGINT;
OnInt(SIGINT);
kill(0, SIGINT);
return -1;
} else if (errno == EAGAIN) {
errno = 0;
return 0;
} else {
WARNF("(srvr) unexpected terminal error %d% m", status);
errno = 0;
return 0;
}
}
DisableRawMode();
lua_repl_lock();
if (status == LUA_OK) {
status = lua_runchunk(L, 0, LUA_MULTRET);
}
if (status == LUA_OK) {
LuaPrint(L);
} else {
lua_report(L, status);
}
lua_repl_unlock();
EnableRawMode();
}
}
static int HandlePoll(int ms) {
int rc, nfds;
size_t pollid, serverid;
if ((nfds = poll(polls, 1 + servers.n, ms)) != -1) {
if (nfds) {
// handle pollid/o events
for (pollid = 0; pollid < 1 + servers.n; ++pollid) {
if (!polls[pollid].revents) continue;
if (polls[pollid].fd < 0) continue;
if (polls[pollid].fd) {
// handle listen socket
lua_repl_lock();
serverid = pollid - 1;
assert(0 <= serverid && serverid < servers.n);
serveraddr = &servers.p[serverid].addr;
ishandlingconnection = true;
rc = HandleConnection(serverid);
ishandlingconnection = false;
lua_repl_unlock();
if (rc == -1) return -1;
#ifndef STATIC
} else {
// handle standard input
rc = HandleReadline();
if (rc == -1) return rc;
#endif
}
}
#ifndef STATIC
} else if (__ttyconf.replmode) {
// handle refresh repl line
rc = HandleReadline();
if (rc < 0) return rc;
#endif
}
} else {
if (errno == EINTR || errno == EAGAIN) {
LockInc(&shared->c.pollinterrupts);
} else if (errno == ENOMEM) {
LockInc(&shared->c.enomems);
WARNF("(srvr) poll error: ran out of memory");
meltdown = true;
} else {
DIEF("(srvr) poll error: %m");
}
errno = 0;
}
return 0;
}
static void Listen(void) {
char ipbuf[16];
size_t i, j, n;
uint32_t ip, port, addrsize, *ifp;
bool hasonserverlisten = IsHookDefined("OnServerListen");
if (!ports.n) {
ProgramPort(8080);
}
if (!ips.n) {
if (interfaces && *interfaces) {
for (ifp = interfaces; *ifp; ++ifp) {
sprintf(ipbuf, "%hhu.%hhu.%hhu.%hhu", *ifp >> 24, *ifp >> 16, *ifp >> 8,
*ifp);
ProgramAddr(ipbuf);
}
} else {
ProgramAddr("0.0.0.0");
}
}
servers.p = malloc(ips.n * ports.n * sizeof(*servers.p));
for (n = i = 0; i < ips.n; ++i) {
for (j = 0; j < ports.n; ++j, ++n) {
bzero(servers.p + n, sizeof(*servers.p));
servers.p[n].addr.sin_family = AF_INET;
servers.p[n].addr.sin_port = htons(ports.p[j]);
servers.p[n].addr.sin_addr.s_addr = htonl(ips.p[i]);
if ((servers.p[n].fd = GoodSocket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC,
IPPROTO_TCP, true, &timeout)) == -1) {
DIEF("(srvr) socket: %m");
}
if (hasonserverlisten &&
LuaOnServerListen(servers.p[n].fd, ips.p[i], ports.p[j])) {
close(servers.p[n].fd);
n--; // skip this server instance
continue;
}
if (bind(servers.p[n].fd, (struct sockaddr *)&servers.p[n].addr,
sizeof(servers.p[n].addr)) == -1) {
DIEF("(srvr) bind error: %m: %hhu.%hhu.%hhu.%hhu:%hu", ips.p[i] >> 24,
ips.p[i] >> 16, ips.p[i] >> 8, ips.p[i], ports.p[j]);
}
if (listen(servers.p[n].fd, 10) == -1) {
DIEF("(srvr) listen error: %m");
}
addrsize = sizeof(servers.p[n].addr);
if (getsockname(servers.p[n].fd, (struct sockaddr *)&servers.p[n].addr,
&addrsize) == -1) {
DIEF("(srvr) getsockname error: %m");
}
port = ntohs(servers.p[n].addr.sin_port);
ip = ntohl(servers.p[n].addr.sin_addr.s_addr);
if (ip == INADDR_ANY) ip = INADDR_LOOPBACK;
INFOF("(srvr) listen http://%hhu.%hhu.%hhu.%hhu:%d", ip >> 24, ip >> 16,
ip >> 8, ip, port);
if (printport && !ports.p[j]) {
printf("%d\r\n", port);
fflush(stdout);
}
}
}
// shrink allocated memory in case some of the sockets were skipped
if (n < ips.n * ports.n)
servers.p = realloc(servers.p, n * sizeof(*servers.p));
servers.n = n;
polls = malloc((1 + n) * sizeof(*polls));
polls[0].fd = -1;
polls[0].events = POLLIN;
polls[0].revents = 0;
for (i = 0; i < n; ++i) {
polls[1 + i].fd = servers.p[i].fd;
polls[1 + i].events = POLLIN;
polls[1 + i].revents = 0;
}
}
static void HandleShutdown(void) {
CloseServerFds();
INFOF("(srvr) received %s", strsignal(shutdownsig));
if (shutdownsig != SIGINT && shutdownsig != SIGQUIT) {
if (!killed) terminated = false;
INFOF("(srvr) killing process group");
KillGroup();
}
WaitAll();
INFOF("(srvr) shutdown complete");
}
// this function coroutines with linenoise
int EventLoop(int ms) {
struct timespec t;
DEBUGF("(repl) event loop");
while (!terminated) {
errno = 0;
if (zombied) {
lua_repl_lock();
ReapZombies();
lua_repl_unlock();
} else if (invalidated) {
lua_repl_lock();
HandleReload();
lua_repl_unlock();
} else if (meltdown) {
lua_repl_lock();
EnterMeltdownMode();
lua_repl_unlock();
meltdown = false;
} else if (timespec_cmp(timespec_sub((t = timespec_real()), lastheartbeat),
heartbeatinterval) >= 0) {
lastheartbeat = t;
HandleHeartbeat();
} else if (HandlePoll(ms) == -1) {
break;
}
}
return -1;
}
static void ReplEventLoop(void) {
lua_State *L = GL;
DEBUGF("ReplEventLoop()");
polls[0].fd = 0;
lua_repl_completions_callback = HandleCompletions;
lua_initrepl(L);
EnableRawMode();
EventLoop(-1);
DisableRawMode();
lua_freerepl();
lua_settop(L, 0); // clear stack
polls[0].fd = -1;
}
static void InstallSignalHandler(int sig, void *handler) {
struct sigaction sa = {.sa_sigaction = handler};
if (sigaction(sig, &sa, 0) == -1)
WARNF("(srvr) failed to set signal handler #%d: %m", sig);
}
static void SigInit(void) {
InstallSignalHandler(SIGINT, OnInt);
InstallSignalHandler(SIGHUP, OnHup);
InstallSignalHandler(SIGTERM, OnTerm);
InstallSignalHandler(SIGCHLD, OnChld);
InstallSignalHandler(SIGUSR1, OnUsr1);
InstallSignalHandler(SIGUSR2, OnUsr2);
InstallSignalHandler(SIGPIPE, SIG_IGN);
}
static void TlsInit(void) {
#ifndef UNSECURE
int suite;
if (unsecure) return;
if (suiteb && !mbedtls_aes_uses_hardware()) {
WARNF("(srvr) requested suiteb crypto, but hardware aes not present");
}
if (!sslinitialized) {
InitializeRng(&rng);
InitializeRng(&rngcli);
suite = suiteb ? MBEDTLS_SSL_PRESET_SUITEB : MBEDTLS_SSL_PRESET_SUITEC;
mbedtls_ssl_config_defaults(&conf, MBEDTLS_SSL_IS_SERVER,
MBEDTLS_SSL_TRANSPORT_STREAM, suite);
mbedtls_ssl_config_defaults(&confcli, MBEDTLS_SSL_IS_CLIENT,
MBEDTLS_SSL_TRANSPORT_STREAM, suite);
}
// the following setting can be re-applied even when SSL/TLS is initialized
if (suites.n) {
mbedtls_ssl_conf_ciphersuites(&conf, suites.p);
mbedtls_ssl_conf_ciphersuites(&confcli, suites.p);
}
if (psks.n) {
mbedtls_ssl_conf_psk_cb(&conf, TlsRoutePsk, 0);
DCHECK_EQ(0,
mbedtls_ssl_conf_psk(&confcli, psks.p[0].key, psks.p[0].key_len,
psks.p[0].identity, psks.p[0].identity_len));
}
if (sslticketlifetime > 0) {
mbedtls_ssl_ticket_setup(&ssltick, mbedtls_ctr_drbg_random, &rng,
MBEDTLS_CIPHER_AES_256_GCM, sslticketlifetime);
mbedtls_ssl_conf_session_tickets_cb(&conf, mbedtls_ssl_ticket_write,
mbedtls_ssl_ticket_parse, &ssltick);
}
if (sslinitialized) return;
sslinitialized = true;
LoadCertificates();
mbedtls_ssl_conf_sni(&conf, TlsRoute, 0);
mbedtls_ssl_conf_dbg(&conf, TlsDebug, 0);
mbedtls_ssl_conf_dbg(&confcli, TlsDebug, 0);
mbedtls_ssl_conf_rng(&conf, mbedtls_ctr_drbg_random, &rng);
mbedtls_ssl_conf_rng(&confcli, mbedtls_ctr_drbg_random, &rngcli);
if (sslclientverify) {
mbedtls_ssl_conf_ca_chain(&conf, GetSslRoots(), 0);
mbedtls_ssl_conf_authmode(&conf, MBEDTLS_SSL_VERIFY_REQUIRED);
}
if (sslfetchverify) {
mbedtls_ssl_conf_ca_chain(&confcli, GetSslRoots(), 0);
mbedtls_ssl_conf_authmode(&confcli, MBEDTLS_SSL_VERIFY_REQUIRED);
} else {
mbedtls_ssl_conf_authmode(&confcli, MBEDTLS_SSL_VERIFY_NONE);
}
mbedtls_ssl_set_bio(&ssl, &g_bio, TlsSend, 0, TlsRecv);
conf.disable_compression = confcli.disable_compression = true;
DCHECK_EQ(0, mbedtls_ssl_conf_alpn_protocols(&conf, (void *)kAlpn));
DCHECK_EQ(0, mbedtls_ssl_conf_alpn_protocols(&confcli, (void *)kAlpn));
DCHECK_EQ(0, mbedtls_ssl_setup(&ssl, &conf));
DCHECK_EQ(0, mbedtls_ssl_setup(&sslcli, &confcli));
#endif
}
static void TlsDestroy(void) {
#ifndef UNSECURE
if (unsecure) return;
mbedtls_ssl_free(&ssl);
mbedtls_ssl_free(&sslcli);
mbedtls_ctr_drbg_free(&rng);
mbedtls_ctr_drbg_free(&rngcli);
mbedtls_ssl_config_free(&conf);
mbedtls_ssl_config_free(&confcli);
mbedtls_ssl_ticket_free(&ssltick);
CertsDestroy();
PsksDestroy();
Free(&suites.p), suites.n = 0;
#endif
}
static void GetOpts(int argc, char *argv[]) {
int opt;
bool got_e_arg = false;
bool storeasset = false;
// only generate ecp cert under blinkenlights (rsa is slow)
norsagen = IsGenuineBlink();
while ((opt = getopt(argc, argv, GETOPTS)) != -1) {
switch (opt) {
CASE('S', ++sandboxed);
CASE('v', ++__log_level);
CASE('s', --__log_level);
CASE('X', unsecure = true);
CASE('%', norsagen = true);
CASE('Z', systrace = true);
CASE('b', logbodies = true);
CASE('z', printport = true);
CASE('d', daemonize = true);
CASE('a', logrusage = true);
CASE('J', requiressl = true);
CASE('u', uniprocess = true);
CASE('g', loglatency = true);
CASE('m', logmessages = true);
CASE('w', launchbrowser = strdup(optarg));
CASE('l', ProgramAddr(optarg));
CASE('H', ProgramHeader(optarg));
CASE('L', ProgramLogPath(optarg));
CASE('P', ProgramPidPath(optarg));
CASE('D', ProgramDirectory(optarg));
CASE('U', ProgramUid(atoi(optarg)));
CASE('G', ProgramGid(atoi(optarg)));
CASE('p', ProgramPort(ParseInt(optarg)));
CASE('R', ProgramRedirectArg(0, optarg));
case 'c':; // accept "num" or "num,directive"
char *p;
long ret = strtol(optarg, &p, 0);
ProgramCache(ret, *p ? p + 1 : NULL); // skip separator, if any
break;
CASE('r', ProgramRedirectArg(307, optarg));
CASE('t', ProgramTimeout(ParseInt(optarg)));
CASE('h', PrintUsage(1, EXIT_SUCCESS));
CASE('M', ProgramMaxPayloadSize(ParseInt(optarg)));
#if !IsTiny()
CASE('W', monitortty = optarg);
case 'f':
funtrace = true;
if (ftrace_install() == -1) {
WARNF("(srvr) ftrace failed to install %m");
}
break;
#endif
#ifndef STATIC
CASE('F', LuaEvalFile(optarg));
CASE('*', selfmodifiable = true);
CASE('i', interpretermode = true);
CASE('E', leakcrashreports = true);
case 'e':
got_e_arg = true;
LuaEvalCode(optarg);
break;
case 'A':
if (!storeasset) {
storeasset = true;
MakeExecutableModifiable();
}
StorePath(optarg);
break;
#endif
#ifndef UNSECURE
CASE('B', suiteb = true);
CASE('V', ++mbedtls_debug_threshold);
CASE('k', sslfetchverify = false);
CASE('j', sslclientverify = true);
CASE('T', ProgramSslTicketLifetime(ParseInt(optarg)));
CASE('C', ProgramFile(optarg, ProgramCertificate));
CASE('K', ProgramFile(optarg, ProgramPrivateKey));
#endif
default:
PrintUsage(2, EX_USAGE);
}
}
// if storing asset(s) is requested, don't need to continue
if (storeasset) exit(0);
// we don't want to drop into a repl after using -e in -i mode
if (interpretermode && got_e_arg) exit(0);
}
void RedBean(int argc, char *argv[]) {
char ibuf[21];
int fd;
// don't complain about --assimilate if it's the only parameter,
// as it can only get here if it's already native or assimilated
if (argc == 2 && strcmp(argv[1], "--assimilate") == 0) return;
if (IsLinux()) {
// disable weird linux capabilities
for (int e = errno, i = 0;; ++i) {
if (prctl(PR_CAPBSET_DROP, i) == -1) {
errno = e;
break;
}
}
// disable sneak privilege since we don't use them
// seccomp will fail later if this fails
prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0);
}
reader = read;
writer = WritevAll;
gmtoff = GetGmtOffset((lastrefresh = startserver = timespec_real()).tv_sec);
mainpid = getpid();
heartbeatinterval.tv_sec = 5;
CHECK_GT(CLK_TCK, 0);
CHECK_NE(MAP_FAILED,
(shared = mmap(NULL, ROUNDUP(sizeof(struct Shared), FRAMESIZE),
PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS,
-1, 0)));
if (daemonize) {
for (int i = 0; i < 256; ++i) {
close(i);
}
open("/dev/null", O_RDONLY);
open("/dev/null", O_WRONLY);
open("/dev/null", O_WRONLY);
}
zpath = GetProgramExecutableName();
CHECK_NE(-1, (zfd = open(zpath, O_RDONLY)));
CHECK_NE(-1, fstat(zfd, &zst));
OpenZip(true);
SetDefaults();
// this can fail with EPERM if we're running under pledge()
if (!interpretermode && !(interfaces = GetHostIps())) {
WARNF("(srvr) failed to query system network interface addresses: %m");
}
LuaStart();
GetOpts(argc, argv);
#ifndef STATIC
if (selfmodifiable) {
MakeExecutableModifiable();
}
#endif
LuaInit();
oldloglevel = __log_level;
if (uniprocess) {
shared->workers = 1;
}
if (daemonize) {
if (!logpath) ProgramLogPath("/dev/null");
dup2(2, 1);
}
SigInit();
Listen();
TlsInit();
if (launchbrowser) {
LaunchBrowser(launchbrowser);
}
if (daemonize) {
Daemonize();
}
if (pidpath) {
fd = open(pidpath, O_CREAT | O_WRONLY | O_TRUNC, 0644);
WRITE(fd, ibuf, FormatInt32(ibuf, getpid()) - ibuf);
close(fd);
}
ChangeUser();
UpdateCurrentDate(timespec_real());
CollectGarbage();
hdrbuf.n = 4 * 1024;
hdrbuf.p = xmalloc(hdrbuf.n);
inbuf_actual.n = maxpayloadsize;
inbuf_actual.p = xmalloc(inbuf_actual.n);
inbuf = inbuf_actual;
isinitialized = true;
CallSimpleHookIfDefined("OnServerStart");
if (!IsTiny()) {
if (monitortty && (daemonize || uniprocess)) {
monitortty = 0;
}
if (monitortty) {
MonitorMemory();
}
}
#ifdef STATIC
EventLoop(timespec_tomillis(heartbeatinterval));
#else
GetHostsTxt(); // for effect
GetResolvConf(); // for effect
if (daemonize || uniprocess || !linenoiseIsTerminal()) {
EventLoop(timespec_tomillis(heartbeatinterval));
} else {
ReplEventLoop();
}
#endif
if (!isexitingworker) {
if (!IsTiny()) {
terminatemonitor = true;
if (monitorth) {
pthread_join(monitorth, 0);
monitorth = 0;
}
}
HandleShutdown();
CallSimpleHookIfDefined("OnServerStop");
}
if (!IsTiny()) {
LuaDestroy();
TlsDestroy();
MemDestroy();
}
}
int main(int argc, char *argv[]) {
lua_progname = "redbean";
#if !IsTiny()
ShowCrashReports();
#endif
LoadZipArgs(&argc, &argv);
RedBean(argc, argv);
// try to detect memory leaks upon:
// 1. main process exit
// 2. unwound worker exit
if (IsModeDbg()) {
if (isexitingworker) {
linenoiseDisableRawMode();
linenoiseHistoryFree();
}
CheckForMemoryLeaks();
}
return 0;
}