/[jscoverage]/trunk/http-host.c
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Revision 427 - (show annotations)
Wed Feb 18 16:08:33 2009 UTC (9 years, 7 months ago) by siliconforks
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1 /*
2 http-host.c - thread-safe host lookup
3 Copyright (C) 2008, 2009 siliconforks.com
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19
20 #include <config.h>
21
22 #include "http-server.h"
23
24 #include "util.h"
25
26 int xgethostbyname(const char * host, struct in_addr * a) {
27 #if defined(__CYGWIN__) || defined(__MINGW32__)
28 /* gethostbyname is thread-safe */
29 struct hostent * p = gethostbyname(host);
30 if (p == NULL || p->h_addrtype != AF_INET) {
31 return -1;
32 }
33 *a = *((struct in_addr *) p->h_addr);
34 return 0;
35 #elif HAVE_GETADDRINFO
36 struct addrinfo hints;
37 hints.ai_flags = 0;
38 hints.ai_family = PF_INET;
39 hints.ai_socktype = 0;
40 hints.ai_protocol = 0;
41 hints.ai_addrlen = 0;
42 hints.ai_addr = NULL;
43 hints.ai_canonname = NULL;
44 hints.ai_next = NULL;
45 struct addrinfo * p;
46 int result = getaddrinfo(host, NULL, &hints, &p);
47 if (result != 0 || p == NULL) {
48 return -1;
49 }
50 if (p->ai_family != PF_INET) {
51 freeaddrinfo(p);
52 return -1;
53 }
54 struct sockaddr_in * address_and_port = (struct sockaddr_in *) p->ai_addr;
55 *a = address_and_port->sin_addr;
56 freeaddrinfo(p);
57 return 0;
58 #elif HAVE_GETHOSTBYNAME_R
59 struct hostent h;
60 struct hostent * p;
61 char * buffer;
62 size_t buffer_size;
63 int error;
64 int result;
65
66 buffer_size = 1024;
67 buffer = xmalloc(buffer_size);
68 while ((result = gethostbyname_r(host, &h, buffer, buffer_size, &p, &error)) == ERANGE) {
69 buffer_size = mulst(buffer_size, 2);
70 buffer = xrealloc(buffer, buffer_size);
71 }
72 if (result != 0 || p == NULL || p->h_addrtype != AF_INET) {
73 free(buffer);
74 return -1;
75 }
76 *a = *((struct in_addr *) p->h_addr);
77 free(buffer);
78 return 0;
79 #else
80 #error "No thread-safe host lookup available"
81 #endif
82 }
83
84 #ifndef HAVE_INET_ATON
85 int inet_aton(const char * name, struct in_addr * a) {
86 unsigned long result = inet_addr(name);
87 if (result == INADDR_NONE) {
88 return 0;
89 }
90 else {
91 a->s_addr = result;
92 return 1;
93 }
94 }
95 #endif

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