Add raop_is_running function.
[deb_shairplay.git] / src / lib / netutils.c
CommitLineData
23e7e3ae
JVH
1/**
2 * Copyright (C) 2011-2012 Juho Vähä-Herttua
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 */
14
2340bcd3
JVH
15#include <stdlib.h>
16#include <string.h>
17#include <assert.h>
18
19#include "compat.h"
20
21int
22netutils_init()
23{
24#ifdef WIN32
25 WORD wVersionRequested;
26 WSADATA wsaData;
27 int ret;
28
29 wVersionRequested = MAKEWORD(2, 2);
30 ret = WSAStartup(wVersionRequested, &wsaData);
31 if (ret) {
32 return -1;
33 }
34
35 if (LOBYTE(wsaData.wVersion) != 2 ||
36 HIBYTE(wsaData.wVersion) != 2) {
37 /* Version mismatch, requested version not found */
38 return -1;
39 }
40#endif
41 return 0;
42}
43
44void
45netutils_cleanup()
46{
47#ifdef WIN32
48 WSACleanup();
49#endif
50}
51
52int
53netutils_init_socket(unsigned short *port, int use_ipv6, int use_udp)
54{
55 int family = use_ipv6 ? AF_INET6 : AF_INET;
56 int type = use_udp ? SOCK_DGRAM : SOCK_STREAM;
57 int proto = use_udp ? IPPROTO_UDP : IPPROTO_TCP;
58
59 struct sockaddr_storage saddr;
60 socklen_t socklen;
61 int server_fd;
62 int ret;
63
64 assert(port);
65
66 server_fd = socket(family, type, proto);
67 if (server_fd == -1) {
68 goto cleanup;
69 }
70
71 memset(&saddr, 0, sizeof(saddr));
72 if (use_ipv6) {
73 struct sockaddr_in6 *sin6ptr = (struct sockaddr_in6 *)&saddr;
74
75 /* Initialize sockaddr for bind */
76 sin6ptr->sin6_family = family;
77 sin6ptr->sin6_addr = in6addr_any;
78 sin6ptr->sin6_port = htons(*port);
79
80 socklen = sizeof(*sin6ptr);
81 ret = bind(server_fd, (struct sockaddr *)sin6ptr, socklen);
82 if (ret == -1) {
83 goto cleanup;
84 }
85
86 ret = getsockname(server_fd, (struct sockaddr *)sin6ptr, &socklen);
87 if (ret == -1) {
88 goto cleanup;
89 }
90 *port = ntohs(sin6ptr->sin6_port);
91 } else {
92 struct sockaddr_in *sinptr = (struct sockaddr_in *)&saddr;
93
94 /* Initialize sockaddr for bind */
95 sinptr->sin_family = family;
96 sinptr->sin_addr.s_addr = INADDR_ANY;
97 sinptr->sin_port = htons(*port);
98
99 socklen = sizeof(*sinptr);
100 ret = bind(server_fd, (struct sockaddr *)sinptr, socklen);
101 if (ret == -1) {
102 goto cleanup;
103 }
104
105 ret = getsockname(server_fd, (struct sockaddr *)sinptr, &socklen);
106 if (ret == -1) {
107 goto cleanup;
108 }
109 *port = ntohs(sinptr->sin_port);
110 }
111 return server_fd;
112
113cleanup:
114 ret = SOCKET_GET_ERROR();
115 if (server_fd != -1) {
116 closesocket(server_fd);
117 }
118 SOCKET_SET_ERROR(ret);
119 return -1;
120}
121
122unsigned char *
123netutils_get_address(void *sockaddr, int *length)
124{
125 unsigned char ipv4_prefix[] = { 0,0,0,0,0,0,0,0,0,0,255,255 };
126 struct sockaddr *address = sockaddr;
127
128 assert(address);
129 assert(length);
130
131 if (address->sa_family == AF_INET) {
132 struct sockaddr_in *sin;
133
134 sin = (struct sockaddr_in *)address;
135 *length = sizeof(sin->sin_addr.s_addr);
136 return (unsigned char *)&sin->sin_addr.s_addr;
137 } else if (address->sa_family == AF_INET6) {
138 struct sockaddr_in6 *sin6;
139
140 sin6 = (struct sockaddr_in6 *)address;
141 if (!memcmp(sin6->sin6_addr.s6_addr, ipv4_prefix, 12)) {
142 /* Actually an embedded IPv4 address */
143 *length = sizeof(sin6->sin6_addr.s6_addr)-12;
144 return (sin6->sin6_addr.s6_addr+12);
145 }
146 *length = sizeof(sin6->sin6_addr.s6_addr);
147 return sin6->sin6_addr.s6_addr;
148 }
149
150 *length = 0;
151 return NULL;
152}
153
ba0970e1
JVH
154int
155netutils_parse_address(int family, const char *src, void *dst, int dstlen)
156{
157 struct addrinfo *result;
158 struct addrinfo *ptr;
159 struct addrinfo hints;
160 int length;
161 int ret;
162
163 if (family != AF_INET && family != AF_INET6) {
164 return -1;
165 }
166 if (!src || !dst) {
167 return -1;
168 }
169
170 memset(&hints, 0, sizeof(hints));
171 hints.ai_family = family;
172 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
173
174 ret = getaddrinfo(src, NULL, &hints, &result);
175 if (ret != 0) {
176 return -1;
177 }
178
179 length = -1;
180 for (ptr=result; ptr!=NULL; ptr=ptr->ai_next) {
181 if (family == ptr->ai_family && dstlen >= ptr->ai_addrlen) {
182 memcpy(dst, ptr->ai_addr, ptr->ai_addrlen);
183 length = ptr->ai_addrlen;
184 break;
185 }
186 }
187 freeaddrinfo(result);
188 return length;
189}