1 #include <sys/socket.h>
2 #include <netinet/in.h>
9 #include "stdio_impl.h"
11 int __lookup_serv(struct service buf[static MAXSERVS], const char *name, int proto, int socktype, int flags)
16 unsigned long port = 0;
41 if (name) return EAI_SERVICE;
44 buf[0].socktype = socktype;
49 if (!*name) return EAI_SERVICE;
50 port = strtoul(name, &z, 10);
53 if (port > 65535) return EAI_SERVICE;
54 if (proto != IPPROTO_UDP) {
56 buf[cnt].socktype = SOCK_STREAM;
57 buf[cnt++].proto = IPPROTO_TCP;
59 if (proto != IPPROTO_TCP) {
61 buf[cnt].socktype = SOCK_DGRAM;
62 buf[cnt++].proto = IPPROTO_UDP;
67 if (flags & AI_NUMERICSERV) return EAI_NONAME;
69 size_t l = strlen(name);
71 unsigned char _buf[1032];
72 FILE _f, *f = __fopen_rb_ca("/etc/services", &_f, _buf, sizeof _buf);
73 if (!f) switch (errno) {
82 while (fgets(line, sizeof line, f) && cnt < MAXSERVS) {
83 if ((p=strchr(line, '#'))) *p++='\n', *p=0;
85 /* Find service name */
86 for(p=line; (p=strstr(p, name)); p++) {
87 if (p>line && !isspace(p[-1])) continue;
88 if (p[l] && !isspace(p[l])) continue;
93 /* Skip past canonical name at beginning of line */
94 for (p=line; *p && !isspace(*p); p++);
96 port = strtoul(p, &z, 10);
97 if (port > 65535 || z==p) continue;
98 if (!strncmp(z, "/udp", 4)) {
99 if (proto == IPPROTO_TCP) continue;
100 buf[cnt].port = port;
101 buf[cnt].socktype = SOCK_DGRAM;
102 buf[cnt++].proto = IPPROTO_UDP;
104 if (!strncmp(z, "/tcp", 4)) {
105 if (proto == IPPROTO_UDP) continue;
106 buf[cnt].port = port;
107 buf[cnt].socktype = SOCK_STREAM;
108 buf[cnt++].proto = IPPROTO_TCP;
112 return cnt > 0 ? cnt : EAI_SERVICE;