From 0b44a0315b47dd8eced9f3b7f31580cf14bbfc01 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sat, 12 Feb 2011 00:22:29 -0500 Subject: initial check-in, version 0.5.0 --- src/network/getservbyname_r.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 src/network/getservbyname_r.c (limited to 'src/network/getservbyname_r.c') diff --git a/src/network/getservbyname_r.c b/src/network/getservbyname_r.c new file mode 100644 index 00000000..5c025150 --- /dev/null +++ b/src/network/getservbyname_r.c @@ -0,0 +1,41 @@ +#define _GNU_SOURCE +#include +#include +#include +#include +#include +#include + +int getservbyname_r(const char *name, const char *prots, + struct servent *se, char *buf, size_t buflen, struct servent **res) +{ + struct addrinfo *ai, hint = { .ai_family = AF_INET }; + int i; + + /* Align buffer */ + i = (uintptr_t)buf & sizeof(char *)-1; + if (!i) i = sizeof(char *); + if (buflen < 3*sizeof(char *)-i) { + errno = ERANGE; + return -1; + } + buf += sizeof(char *)-i; + buflen -= sizeof(char *)-i; + + if (!strcmp(prots, "tcp")) hint.ai_protocol = IPPROTO_TCP; + else if (!strcmp(prots, "udp")) hint.ai_protocol = IPPROTO_UDP; + else return -1; + + if (getaddrinfo(0, name, &hint, &ai) < 0) return -1; + + se->s_name = (char *)name; + se->s_aliases = (void *)buf; + se->s_aliases[0] = se->s_name; + se->s_aliases[1] = 0; + se->s_port = ((struct sockaddr_in *)ai->ai_addr)->sin_port; + se->s_proto = (char *)prots; + + freeaddrinfo(ai); + *res = se; + return 0; +} -- cgit v1.2.1