source: azure_iot_hub/trunk/musl-1.1.18/src/network/lookup_serv.c@ 389

Last change on this file since 389 was 389, checked in by coas-nagasima, 5 years ago

ビルドが通るよう更新
  • Property svn:eol-style set to native
  • Property svn:mime-type set to text/x-csrc;charset=UTF-8
File size: 2.3 KB
Line 
1#include <sys/socket.h>
2#include <netinet/in.h>
3#include <netdb.h>
4#include <ctype.h>
5#include <string.h>
6#include <fcntl.h>
7#include <errno.h>
8#include "lookup.h"
9#include "stdio_impl.h"
10
11int __lookup_serv(struct service buf[static MAXSERVS], const char *name, int proto, int socktype, int flags)
12{
13 char line[128];
14 int cnt = 0;
15 char *p, *z = "";
16 unsigned long port = 0;
17
18 switch (socktype) {
19 case SOCK_STREAM:
20 switch (proto) {
21 case 0:
22 proto = IPPROTO_TCP;
23 case IPPROTO_TCP:
24 break;
25 default:
26 return EAI_SERVICE;
27 }
28 break;
29 case SOCK_DGRAM:
30 switch (proto) {
31 case 0:
32 proto = IPPROTO_UDP;
33 case IPPROTO_UDP:
34 break;
35 default:
36 return EAI_SERVICE;
37 }
38 case 0:
39 break;
40 default:
41 if (name) return EAI_SERVICE;
42 buf[0].port = 0;
43 buf[0].proto = proto;
44 buf[0].socktype = socktype;
45 return 1;
46 }
47
48 if (name) {
49 if (!*name) return EAI_SERVICE;
50 port = strtoul(name, &z, 10);
51 }
52 if (!*z) {
53 if (port > 65535) return EAI_SERVICE;
54 if (proto != IPPROTO_UDP) {
55 buf[cnt].port = port;
56 buf[cnt].socktype = SOCK_STREAM;
57 buf[cnt++].proto = IPPROTO_TCP;
58 }
59 if (proto != IPPROTO_TCP) {
60 buf[cnt].port = port;
61 buf[cnt].socktype = SOCK_DGRAM;
62 buf[cnt++].proto = IPPROTO_UDP;
63 }
64 return cnt;
65 }
66
67 if (flags & AI_NUMERICSERV) return EAI_SERVICE;
68
69 size_t l = strlen(name);
70
71 unsigned char _buf[1032];
72 FILE _f, *f = __fopen_rb_ca("/etc/services", &_f, _buf, sizeof _buf);
73 if (!f) switch (errno) {
74 case ENOENT:
75 case ENOTDIR:
76 case EACCES:
77 return EAI_SERVICE;
78 default:
79 return EAI_SYSTEM;
80 }
81
82 while (fgets(line, sizeof line, f) && cnt < MAXSERVS) {
83 if ((p=strchr(line, '#'))) *p++='\n', *p=0;
84
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;
89 break;
90 }
91 if (!p) continue;
92
93 /* Skip past canonical name at beginning of line */
94 for (p=line; *p && !isspace(*p); p++);
95
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;
103 }
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;
109 }
110 }
111 __fclose_ca(f);
112 return cnt > 0 ? cnt : EAI_SERVICE;
113}
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