mirror of
https://github.com/jart/cosmopolitan.git
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6f7d0cb1c3
This makes breaking changes to add underscores to many non-standard function names provided by the c library. MODE=tiny is now tinier and we now use smaller locks that are better for tiny apps in this mode. Some headers have been renamed to be in the same folder as the build package, so it'll be easier to know which build dependency is needed. Certain old misguided interfaces have been removed. Intel intrinsics headers are now listed in libc/isystem (but not in the amalgamation) to help further improve open source compatibility. Header complexity has also been reduced. Lastly, more shell scripts are now available.
107 lines
4.5 KiB
C
107 lines
4.5 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/intrin/safemacros.internal.h"
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#include "libc/calls/calls.h"
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#include "libc/dns/dns.h"
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#include "libc/dns/hoststxt.h"
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#include "libc/dns/resolvconf.h"
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#include "libc/dns/servicestxt.h"
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#include "libc/fmt/conv.h"
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#include "libc/mem/mem.h"
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#include "libc/mem/gc.h"
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#include "libc/sock/sock.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/af.h"
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#include "libc/sysv/consts/inaddr.h"
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#include "libc/sysv/consts/sock.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Resolves address for internet name.
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*
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* @param name is either an ip string or a utf-8 hostname
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* @param service is the port number as a string
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* @param hints may be passed to specialize behavior (optional)
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* @param res receives a pointer that must be freed with freeaddrinfo(),
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* and won't be modified if non-zero is returned
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* @return 0 on success or EAI_xxx value
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* @threadsafe
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*/
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int getaddrinfo(const char *name, const char *service,
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const struct addrinfo *hints, struct addrinfo **res) {
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int rc, port;
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const char *canon;
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size_t protolen;
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struct addrinfo *ai;
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char proto[32];
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port = 0;
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if (!name && !service) return EAI_NONAME;
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if (!name && (hints->ai_flags & AI_CANONNAME)) return EAI_BADFLAGS;
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if (service && (port = parseport(service)) == -1) {
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if (hints->ai_socktype == SOCK_STREAM)
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strcpy(proto, "tcp");
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else if (hints->ai_socktype == SOCK_DGRAM)
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strcpy(proto, "udp");
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else /* ai_socktype == 0 */
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strcpy(proto, "");
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if ((port = LookupServicesByName(service, proto, sizeof(proto), NULL, 0,
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NULL)) == -1) {
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return EAI_NONAME;
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}
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}
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if (!(ai = newaddrinfo(port))) return EAI_MEMORY;
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if (service) ai->ai_addr4->sin_port = htons(port);
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if (hints) {
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ai->ai_socktype = hints->ai_socktype;
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ai->ai_protocol = hints->ai_protocol;
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}
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if (!name) {
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ai->ai_addr4->sin_addr.s_addr =
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(hints && (hints->ai_flags & AI_PASSIVE) == AI_PASSIVE)
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? INADDR_ANY
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: INADDR_LOOPBACK;
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*res = ai;
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return 0;
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}
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if (inet_pton(AF_INET, name, &ai->ai_addr4->sin_addr.s_addr) == 1) {
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*res = ai;
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return 0;
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} else if (hints && (hints->ai_flags & AI_NUMERICHOST) == AI_NUMERICHOST) {
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freeaddrinfo(ai);
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return EAI_NONAME;
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} else if (ResolveHostsTxt(GetHostsTxt(), AF_INET, name, ai->ai_addr,
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sizeof(ai->ai_addr4), &canon) > 0) {
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memcpy(ai->ai_canonname, canon, min(strlen(canon), DNS_NAME_MAX) + 1);
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*res = ai;
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return 0;
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} else {
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rc = ResolveDns(GetResolvConf(), AF_INET, name, ai->ai_addr,
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sizeof(ai->ai_addr4));
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if (rc > 0) {
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*res = ai;
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return 0;
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}
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freeaddrinfo(ai);
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if (rc == 0) {
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return EAI_NONAME;
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} else {
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return EAI_SYSTEM;
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}
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}
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}
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