Commit | Line | Data |
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460b9539 | 1 | /* |
2 | * This file is part of DisOrder. | |
3 | * Copyright (C) 2004 Richard Kettlewell | |
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, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
18 | * USA | |
19 | */ | |
20 | ||
21 | #include <config.h> | |
22 | #include "types.h" | |
23 | ||
24 | #include <stdio.h> | |
25 | #include <string.h> | |
26 | #include <sys/types.h> | |
27 | #include <sys/socket.h> | |
28 | #include <netinet/in.h> | |
29 | #include <netdb.h> | |
30 | ||
31 | #include "log.h" | |
32 | #include "printf.h" | |
33 | #include "configuration.h" | |
34 | #include "addr.h" | |
35 | ||
36 | struct addrinfo *get_address(const struct stringlist *a, | |
37 | const struct addrinfo *pref, | |
38 | char **namep) { | |
39 | struct addrinfo *res; | |
40 | char *name; | |
41 | int rc; | |
e83d0967 RK |
42 | |
43 | switch(a->n) { | |
44 | case 1: | |
460b9539 | 45 | byte_xasprintf(&name, "host * service %s", a->s[0]); |
46 | if((rc = getaddrinfo(0, a->s[0], pref, &res))) { | |
47 | error(0, "getaddrinfo %s: %s", a->s[0], gai_strerror(rc)); | |
48 | return 0; | |
49 | } | |
e83d0967 RK |
50 | break; |
51 | case 2: | |
460b9539 | 52 | byte_xasprintf(&name, "host %s service %s", a->s[0], a->s[1]); |
53 | if((rc = getaddrinfo(a->s[0], a->s[1], pref, &res))) { | |
54 | error(0, "getaddrinfo %s %s: %s", a->s[0], a->s[1], gai_strerror(rc)); | |
55 | return 0; | |
56 | } | |
e83d0967 RK |
57 | break; |
58 | default: | |
59 | error(0, "invalid network address specification (n=%d)", a->n); | |
60 | return 0; | |
460b9539 | 61 | } |
e83d0967 RK |
62 | if(!res || (pref && res->ai_socktype != pref->ai_socktype)) { |
63 | error(0, "getaddrinfo didn't give us a suitable socket address"); | |
460b9539 | 64 | if(res) |
65 | freeaddrinfo(res); | |
66 | return 0; | |
67 | } | |
68 | if(namep) | |
69 | *namep = name; | |
70 | return res; | |
71 | } | |
72 | ||
73 | int addrinfocmp(const struct addrinfo *a, | |
74 | const struct addrinfo *b) { | |
75 | const struct sockaddr_in *ina, *inb; | |
76 | const struct sockaddr_in6 *in6a, *in6b; | |
77 | ||
78 | if(a->ai_family != b->ai_family) return a->ai_family - b->ai_family; | |
79 | if(a->ai_socktype != b->ai_socktype) return a->ai_socktype - b->ai_socktype; | |
80 | if(a->ai_protocol != b->ai_protocol) return a->ai_protocol - b->ai_protocol; | |
81 | switch(a->ai_protocol) { | |
82 | case PF_INET: | |
83 | ina = (const struct sockaddr_in *)a->ai_addr; | |
84 | inb = (const struct sockaddr_in *)b->ai_addr; | |
85 | if(ina->sin_port != inb->sin_port) return ina->sin_port - inb->sin_port; | |
86 | return ina->sin_addr.s_addr - inb->sin_addr.s_addr; | |
87 | break; | |
88 | case PF_INET6: | |
89 | in6a = (const struct sockaddr_in6 *)a->ai_addr; | |
90 | in6b = (const struct sockaddr_in6 *)b->ai_addr; | |
91 | if(in6a->sin6_port != in6b->sin6_port) | |
92 | return in6a->sin6_port - in6b->sin6_port; | |
93 | return memcmp(&in6a->sin6_addr, &in6b->sin6_addr, | |
94 | sizeof (struct in6_addr)); | |
95 | default: | |
96 | error(0, "unsupported protocol family %d", a->ai_protocol); | |
97 | return memcmp(a->ai_addr, b->ai_addr, a->ai_addrlen); /* kludge */ | |
98 | } | |
99 | } | |
100 | ||
101 | /* | |
102 | Local Variables: | |
103 | c-basic-offset:2 | |
104 | comment-column:40 | |
105 | End: | |
106 | */ |