mirror of
https://github.com/jart/cosmopolitan.git
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93 lines
4 KiB
C
93 lines
4 KiB
C
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/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
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│ vi: set noet ft=c ts=8 sw=8 fenc=utf-8 :vi │
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╚──────────────────────────────────────────────────────────────────────────────╝
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│ │
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│ Musl Libc │
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│ Copyright © 2005-2014 Rich Felker, et al. │
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│ │
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│ Permission is hereby granted, free of charge, to any person obtaining │
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│ a copy of this software and associated documentation files (the │
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│ "Software"), to deal in the Software without restriction, including │
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│ without limitation the rights to use, copy, modify, merge, publish, │
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│ distribute, sublicense, and/or sell copies of the Software, and to │
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│ permit persons to whom the Software is furnished to do so, subject to │
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│ the following conditions: │
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│ │
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│ The above copyright notice and this permission notice shall be │
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│ included in all copies or substantial portions of the Software. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
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│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
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│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
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│ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY │
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│ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, │
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│ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │
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│ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │
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│ │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/errno.h"
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#include "libc/fmt/conv.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 "third_party/musl/netdb.h"
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asm(".ident\t\"\\n\\n\
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Musl libc (MIT License)\\n\
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Copyright 2005-2014 Rich Felker, et. al.\"");
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asm(".include \"libc/disclaimer.inc\"");
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errno_t getservbyport_r(int port, const char *prots,
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struct servent *se, char *buf, size_t buflen, struct servent **res)
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{
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int i;
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struct sockaddr_in sin = {
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.sin_family = AF_INET,
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.sin_port = port,
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};
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if (!prots) {
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int r = getservbyport_r(port, "tcp", se, buf, buflen, res);
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if (r) r = getservbyport_r(port, "udp", se, buf, buflen, res);
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return r;
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}
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*res = 0;
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/* Align buffer */
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i = (uintptr_t)buf & (sizeof(char *)-1);
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if (!i) i = sizeof(char *);
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if (buflen <= 3*sizeof(char *)-i)
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return ERANGE;
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buf += sizeof(char *)-i;
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buflen -= sizeof(char *)-i;
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if (strcmp(prots, "tcp") && strcmp(prots, "udp")) return EINVAL;
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se->s_port = port;
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se->s_proto = (char *)prots;
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se->s_aliases = (void *)buf;
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buf += 2*sizeof(char *);
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buflen -= 2*sizeof(char *);
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se->s_aliases[1] = 0;
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se->s_aliases[0] = se->s_name = buf;
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switch (getnameinfo((void *)&sin, sizeof sin, 0, 0, buf, buflen,
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strcmp(prots, "udp") ? 0 : NI_DGRAM)) {
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case EAI_MEMORY:
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case EAI_SYSTEM:
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return ENOMEM;
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case EAI_OVERFLOW:
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return ERANGE;
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default:
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return ENOENT;
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case 0:
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break;
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}
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/* A numeric port string is not a service record. */
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if (strtol(buf, 0, 10)==ntohs(port)) return ENOENT;
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*res = se;
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return 0;
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}
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