mirror of
https://github.com/jart/cosmopolitan.git
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74 lines
3.5 KiB
C
74 lines
3.5 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 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/errno.h"
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#include "libc/fmt/itoa.h"
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#include "libc/intrin/describeflags.internal.h"
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#include "libc/macros.internal.h"
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#include "libc/sock/sock.h"
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#include "libc/sock/struct/sockaddr.h"
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#include "libc/sock/struct/sockaddr6.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/sock.h"
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const char *(DescribeSockaddr)(char buf[128], const struct sockaddr *sa,
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size_t sasize) {
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int e;
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size_t n;
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uint16_t port;
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char *p, ip[72];
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e = errno;
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stpcpy(buf, "NULL");
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if (sa && sasize >= sizeof(sa->sa_family)) {
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stpcpy(buf, DescribeSocketFamily(sa->sa_family));
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if (sa->sa_family == AF_INET && sasize >= sizeof(struct sockaddr_in)) {
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const struct sockaddr_in *in;
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in = (const struct sockaddr_in *)sa;
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if (inet_ntop(AF_INET, &in->sin_addr, ip, sizeof(ip))) {
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p = buf;
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p = stpcpy(p, ip);
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*p++ = ':';
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p = FormatUint32(p, ntohs(in->sin_port));
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}
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} else if (sa->sa_family == AF_INET6 &&
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sasize >= sizeof(struct sockaddr_in6)) {
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const struct sockaddr_in6 *in6;
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in6 = (const struct sockaddr_in6 *)sa;
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if (inet_ntop(AF_INET6, &in6->sin6_addr, ip, sizeof(ip))) {
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p = buf;
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*p++ = '[';
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p = stpcpy(p, ip);
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*p++ = ']';
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*p++ = ':';
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p = FormatUint32(p, in6->sin6_port);
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}
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} else if (sa->sa_family == AF_UNIX &&
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sasize >= sizeof(struct sockaddr_un)) {
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const struct sockaddr_un *unix;
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unix = (const struct sockaddr_un *)sa;
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n = strnlen(unix->sun_path, sizeof(unix->sun_path));
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n = MIN(n, 128 - 1);
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memcpy(buf, unix->sun_path, n);
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buf[n] = 0;
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}
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}
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errno = e;
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return buf;
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}
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