mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-01 03:53:33 +00:00
8bdaddd81d
The stdio reader thread now appears to be working recursively along cosmopolitan subprocesses. For example, it's now possible to launch vim.com from the unbourne.com bestline repl, thanks to hacks plus a bug fix to select() timeouts.
124 lines
4.9 KiB
C
124 lines
4.9 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 2021 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/calls/calls.h"
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#include "libc/calls/syscall-sysv.internal.h"
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#include "libc/calls/syscall_support-nt.internal.h"
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#include "libc/dce.h"
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#include "libc/intrin/bits.h"
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#include "libc/macros.internal.h"
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#include "libc/mem/mem.h"
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#include "libc/nt/errors.h"
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#include "libc/nt/iphlpapi.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/ipproto.h"
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#include "libc/sysv/consts/sio.h"
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#include "libc/sysv/consts/sock.h"
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static uint32_t *GetUnixIps(void) {
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int fd, n;
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uint64_t z;
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uint32_t *a;
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char *b, *p, *e, c[16];
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if ((fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP)) == -1) return 0;
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a = 0;
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n = 0;
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z = 15000;
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b = malloc(z);
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memcpy(c, &z, 8);
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memcpy(c + (IsXnu() ? 4 : 8), &b, 8);
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if (sys_ioctl(fd, SIOCGIFCONF, &c) != -1) {
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for (p = b, e = p + MIN(z, READ32LE(c)); p + 16 + 16 <= e;
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p += IsBsd() ? 16 + MAX(16, p[16] & 255) : 40) {
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if ((p[IsBsd() ? 17 : 16] & 255) != AF_INET) continue;
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a = realloc(a, ++n * sizeof(*a));
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a[n - 1] = READ32BE(p + 20);
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}
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a = realloc(a, ++n * sizeof(*a));
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a[n - 1] = 0;
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}
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close(fd);
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free(b);
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return a;
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}
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static textwindows uint32_t *GetWindowsIps(void) {
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uint32_t i, z, n, rc, *a;
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struct NtIpAdapterUnicastAddress *u;
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struct NtIpAdapterAddresses *p, *ifaces;
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i = 0;
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z = 15000;
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do {
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if (!(ifaces = malloc(z))) return 0;
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rc = GetAdaptersAddresses(AF_INET,
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kNtGaaFlagSkipAnycast | kNtGaaFlagSkipMulticast |
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kNtGaaFlagSkipDnsServer |
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kNtGaaFlagSkipFriendlyName,
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0, ifaces, &z);
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if (rc != kNtErrorBufferOverflow) break;
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free(ifaces);
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ifaces = 0;
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} while (++i < 3);
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if (rc == kNtErrorNoData) {
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a = calloc(1, sizeof(*a));
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} else if (rc == kNtNoError) {
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for (a = 0, n = 0, p = ifaces; p; p = p->Next) {
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if (p->OperStatus != kNtIfOperStatusUp) continue;
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for (u = p->FirstUnicastAddress; u; u = u->Next) {
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if (u->Address.lpSockaddr->sa_family != AF_INET) continue;
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a = realloc(a, ++n * sizeof(*a));
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a[n - 1] = ntohl(
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((struct sockaddr_in *)u->Address.lpSockaddr)->sin_addr.s_addr);
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}
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}
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a = realloc(a, ++n * sizeof(*a));
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a[n - 1] = 0;
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} else {
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__winerr();
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a = 0;
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}
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free(ifaces);
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return a;
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}
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/**
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* Returns IP addresses of system.
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*
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* Normally return values will look like `{0x7f000001, 0x0a0a0a7c, 0}`
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* which means the same thing as `{"127.0.0.1", "10.10.10.124", 0}`.
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* Returned IPs will IPv4 anycast addresses bound to network interfaces
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* which come in a NULL-terminated array with no particular ordering.
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*
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* uint32_t *ip, *ips = GetIps();
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* for (ip = ips; *ip; ++ip) {
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* printf("%hhu.%hhu.%hhu.%hhu\n", *ip >> 24, *ip >> 16, *ip >> 8, *ip);
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* }
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*
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* This function supports Windows, Linux, XNU, FreeBSD, NetBSD, OpenBSD.
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*
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* @return null-terminated ip array on success, or null w/ errno
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*/
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uint32_t *GetHostIps(void) {
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if (!IsWindows()) {
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return GetUnixIps();
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} else {
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return GetWindowsIps();
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}
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}
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