]>
Commit | Line | Data |
---|---|---|
89d46774 | 1 | /* |
f2d18633 | 2 | * "$Id$" |
89d46774 | 3 | * |
71e16022 | 4 | * Network interface functions for CUPS. |
89d46774 | 5 | * |
71e16022 | 6 | * Copyright 2007-2010 by Apple Inc. |
89d46774 | 7 | * Copyright 1997-2006 by Easy Software Products, all rights reserved. |
8 | * | |
9 | * These coded instructions, statements, and computer programs are the | |
bc44d920 | 10 | * property of Apple Inc. and are protected by Federal copyright |
11 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
89d46774 | 12 | * "LICENSE" which should have been included with this file. If this |
bc44d920 | 13 | * file is missing or damaged, see the license at "http://www.cups.org/". |
89d46774 | 14 | * |
15 | * Contents: | |
16 | * | |
17 | * _cups_getifaddrs() - Get a list of network interfaces on the system. | |
18 | * _cups_freeifaddrs() - Free an interface list... | |
19 | */ | |
20 | ||
21 | /* | |
22 | * Include necessary headers. | |
23 | */ | |
24 | ||
25 | #include "http-private.h" | |
26 | ||
27 | ||
28 | #ifndef HAVE_GETIFADDRS | |
29 | /* | |
30 | * '_cups_getifaddrs()' - Get a list of network interfaces on the system. | |
31 | */ | |
32 | ||
a74454a7 | 33 | int /* O - 0 on success, -1 on error */ |
89d46774 | 34 | _cups_getifaddrs(struct ifaddrs **addrs)/* O - List of interfaces */ |
35 | { | |
36 | int sock; /* Socket */ | |
37 | char buffer[65536], /* Buffer for address info */ | |
38 | *bufptr, /* Pointer into buffer */ | |
39 | *bufend; /* End of buffer */ | |
40 | struct ifconf conf; /* Interface configurations */ | |
41 | struct sockaddr addr; /* Address data */ | |
42 | struct ifreq *ifp; /* Interface data */ | |
43 | int ifpsize; /* Size of interface data */ | |
44 | struct ifaddrs *temp; /* Pointer to current interface */ | |
45 | struct ifreq request; /* Interface request */ | |
46 | ||
47 | ||
48 | /* | |
49 | * Start with an empty list... | |
50 | */ | |
51 | ||
52 | if (addrs == NULL) | |
53 | return (-1); | |
54 | ||
55 | *addrs = NULL; | |
56 | ||
57 | /* | |
58 | * Create a UDP socket to get the interface data... | |
59 | */ | |
60 | ||
61 | memset (&addr, 0, sizeof(addr)); | |
62 | if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) | |
63 | return (-1); | |
64 | ||
65 | /* | |
66 | * Try to get the list of interfaces... | |
67 | */ | |
68 | ||
69 | conf.ifc_len = sizeof(buffer); | |
70 | conf.ifc_buf = buffer; | |
71 | ||
72 | if (ioctl(sock, SIOCGIFCONF, &conf) < 0) | |
73 | { | |
74 | /* | |
75 | * Couldn't get the list of interfaces... | |
76 | */ | |
77 | ||
78 | close(sock); | |
79 | return (-1); | |
80 | } | |
81 | ||
82 | /* | |
83 | * OK, got the list of interfaces, now lets step through the | |
84 | * buffer to pull them out... | |
85 | */ | |
86 | ||
87 | # ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
88 | # define sockaddr_len(a) ((a)->sa_len) | |
89 | # else | |
90 | # define sockaddr_len(a) (sizeof(struct sockaddr)) | |
91 | # endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
92 | ||
93 | for (bufptr = buffer, bufend = buffer + conf.ifc_len; | |
94 | bufptr < bufend; | |
95 | bufptr += ifpsize) | |
96 | { | |
97 | /* | |
98 | * Get the current interface information... | |
99 | */ | |
100 | ||
101 | ifp = (struct ifreq *)bufptr; | |
102 | ifpsize = sizeof(ifp->ifr_name) + sockaddr_len(&(ifp->ifr_addr)); | |
103 | ||
104 | if (ifpsize < sizeof(struct ifreq)) | |
105 | ifpsize = sizeof(struct ifreq); | |
106 | ||
107 | memset(&request, 0, sizeof(request)); | |
108 | memcpy(request.ifr_name, ifp->ifr_name, sizeof(ifp->ifr_name)); | |
109 | ||
110 | /* | |
111 | * Check the status of the interface... | |
112 | */ | |
113 | ||
114 | if (ioctl(sock, SIOCGIFFLAGS, &request) < 0) | |
115 | continue; | |
116 | ||
117 | /* | |
118 | * Allocate memory for a single interface record... | |
119 | */ | |
120 | ||
121 | if ((temp = calloc(1, sizeof(struct ifaddrs))) == NULL) | |
122 | { | |
123 | /* | |
124 | * Unable to allocate memory... | |
125 | */ | |
126 | ||
127 | close(sock); | |
128 | return (-1); | |
129 | } | |
130 | ||
131 | /* | |
132 | * Add this record to the front of the list and copy the name, flags, | |
133 | * and network address... | |
134 | */ | |
135 | ||
136 | temp->ifa_next = *addrs; | |
137 | *addrs = temp; | |
138 | temp->ifa_name = strdup(ifp->ifr_name); | |
139 | temp->ifa_flags = request.ifr_flags; | |
140 | if ((temp->ifa_addr = calloc(1, sockaddr_len(&(ifp->ifr_addr)))) != NULL) | |
141 | memcpy(temp->ifa_addr, &(ifp->ifr_addr), sockaddr_len(&(ifp->ifr_addr))); | |
142 | ||
143 | /* | |
144 | * Try to get the netmask for the interface... | |
145 | */ | |
146 | ||
147 | if (!ioctl(sock, SIOCGIFNETMASK, &request)) | |
148 | { | |
149 | /* | |
150 | * Got it, make a copy... | |
151 | */ | |
152 | ||
153 | if ((temp->ifa_netmask = calloc(1, sizeof(request.ifr_netmask))) != NULL) | |
154 | memcpy(temp->ifa_netmask, &(request.ifr_netmask), | |
155 | sizeof(request.ifr_netmask)); | |
156 | } | |
157 | ||
158 | /* | |
159 | * Then get the broadcast or point-to-point (destination) address, | |
160 | * if applicable... | |
161 | */ | |
162 | ||
163 | if (temp->ifa_flags & IFF_BROADCAST) | |
164 | { | |
165 | /* | |
166 | * Have a broadcast address, so get it! | |
167 | */ | |
168 | ||
169 | if (!ioctl(sock, SIOCGIFBRDADDR, &request)) | |
170 | { | |
171 | /* | |
172 | * Got it, make a copy... | |
173 | */ | |
174 | ||
f301802f | 175 | if ((temp->ifa_broadaddr = |
176 | calloc(1, sizeof(request.ifr_broadaddr))) != NULL) | |
177 | memcpy(temp->ifa_broadaddr, &(request.ifr_broadaddr), | |
89d46774 | 178 | sizeof(request.ifr_broadaddr)); |
179 | } | |
180 | } | |
181 | else if (temp->ifa_flags & IFF_POINTOPOINT) | |
182 | { | |
183 | /* | |
184 | * Point-to-point interface; grab the remote address... | |
185 | */ | |
186 | ||
187 | if (!ioctl(sock, SIOCGIFDSTADDR, &request)) | |
188 | { | |
189 | temp->ifa_dstaddr = malloc(sizeof(request.ifr_dstaddr)); | |
190 | memcpy(temp->ifa_dstaddr, &(request.ifr_dstaddr), | |
191 | sizeof(request.ifr_dstaddr)); | |
192 | } | |
193 | } | |
194 | } | |
195 | ||
196 | /* | |
197 | * OK, we're done with the socket, close it and return 0... | |
198 | */ | |
199 | ||
200 | close(sock); | |
201 | ||
202 | return (0); | |
203 | } | |
204 | ||
205 | ||
206 | /* | |
207 | * '_cups_freeifaddrs()' - Free an interface list... | |
208 | */ | |
209 | ||
a74454a7 | 210 | void |
89d46774 | 211 | _cups_freeifaddrs(struct ifaddrs *addrs)/* I - Interface list to free */ |
212 | { | |
213 | struct ifaddrs *next; /* Next interface in list */ | |
214 | ||
215 | ||
216 | while (addrs != NULL) | |
217 | { | |
218 | /* | |
219 | * Make a copy of the next interface pointer... | |
220 | */ | |
221 | ||
222 | next = addrs->ifa_next; | |
223 | ||
224 | /* | |
225 | * Free data values as needed... | |
226 | */ | |
227 | ||
228 | if (addrs->ifa_name) | |
229 | { | |
230 | free(addrs->ifa_name); | |
231 | addrs->ifa_name = NULL; | |
232 | } | |
233 | ||
234 | if (addrs->ifa_addr) | |
235 | { | |
236 | free(addrs->ifa_addr); | |
237 | addrs->ifa_addr = NULL; | |
238 | } | |
239 | ||
240 | if (addrs->ifa_netmask) | |
241 | { | |
242 | free(addrs->ifa_netmask); | |
243 | addrs->ifa_netmask = NULL; | |
244 | } | |
245 | ||
246 | if (addrs->ifa_dstaddr) | |
247 | { | |
248 | free(addrs->ifa_dstaddr); | |
249 | addrs->ifa_dstaddr = NULL; | |
250 | } | |
251 | ||
252 | /* | |
253 | * Free this node and continue to the next... | |
254 | */ | |
255 | ||
256 | free(addrs); | |
257 | ||
258 | addrs = next; | |
259 | } | |
260 | } | |
261 | #endif /* !HAVE_GETIFADDRS */ | |
262 | ||
263 | ||
264 | /* | |
f2d18633 | 265 | * End of "$Id$". |
89d46774 | 266 | */ |