1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at http://curl.haxx.se/docs/copyright.html.
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
21 ***************************************************************************/
23 #include "curl_setup.h"
25 #ifdef HAVE_NETINET_IN_H
26 # include <netinet/in.h>
28 #ifdef HAVE_ARPA_INET_H
29 # include <arpa/inet.h>
34 #ifdef HAVE_SYS_IOCTL_H
35 # include <sys/ioctl.h>
40 #ifdef HAVE_SYS_SOCKIO_H
41 # include <sys/sockio.h>
53 #include "inet_ntop.h"
56 #include "curl_printf.h"
58 #include "curl_memory.h"
59 /* The last #include file should be: */
62 /* ------------------------------------------------------------------ */
64 /* Return the scope of the given address. */
65 unsigned int Curl_ipv6_scope(const struct sockaddr *sa)
70 if(sa->sa_family == AF_INET6) {
71 const struct sockaddr_in6 * sa6 = (const struct sockaddr_in6 *) sa;
72 const unsigned char * b = sa6->sin6_addr.s6_addr;
73 unsigned short w = (unsigned short) ((b[0] << 8) | b[1]);
77 return IPV6_SCOPE_LINKLOCAL;
79 return IPV6_SCOPE_SITELOCAL;
81 w = b[1] | b[2] | b[3] | b[4] | b[5] | b[6] | b[7] | b[8] | b[9] |
82 b[10] | b[11] | b[12] | b[13] | b[14];
83 if(w || b[15] != 0x01)
85 return IPV6_SCOPE_NODELOCAL;
92 return IPV6_SCOPE_GLOBAL;
96 #if defined(HAVE_GETIFADDRS)
98 bool Curl_if_is_interface_name(const char *interf)
102 struct ifaddrs *iface, *head;
104 if(getifaddrs(&head) >= 0) {
105 for(iface=head; iface != NULL; iface=iface->ifa_next) {
106 if(curl_strequal(iface->ifa_name, interf)) {
116 if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope,
117 unsigned int remote_scope_id, const char *interf,
118 char *buf, int buf_size)
120 struct ifaddrs *iface, *head;
121 if2ip_result_t res = IF2IP_NOT_FOUND;
126 #ifndef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
127 (void) remote_scope_id;
132 if(getifaddrs(&head) >= 0) {
133 for(iface = head; iface != NULL; iface=iface->ifa_next) {
134 if(iface->ifa_addr != NULL) {
135 if(iface->ifa_addr->sa_family == af) {
136 if(curl_strequal(iface->ifa_name, interf)) {
143 unsigned int scopeid = 0;
144 unsigned int ifscope = Curl_ipv6_scope(iface->ifa_addr);
146 if(ifscope != remote_scope) {
147 /* We are interested only in interface addresses whose
148 scope matches the remote address we want to
149 connect to: global for global, link-local for
150 link-local, etc... */
151 if(res == IF2IP_NOT_FOUND) res = IF2IP_AF_NOT_SUPPORTED;
155 addr = &((struct sockaddr_in6 *)iface->ifa_addr)->sin6_addr;
156 #ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
157 /* Include the scope of this interface as part of the address */
159 ((struct sockaddr_in6 *)iface->ifa_addr)->sin6_scope_id;
161 /* If given, scope id should match. */
162 if(remote_scope_id && scopeid != remote_scope_id) {
163 if(res == IF2IP_NOT_FOUND)
164 res = IF2IP_AF_NOT_SUPPORTED;
170 snprintf(scope, sizeof(scope), "%%%u", scopeid);
174 addr = &((struct sockaddr_in *)iface->ifa_addr)->sin_addr;
176 ip = (char *) Curl_inet_ntop(af, addr, ipstr, sizeof(ipstr));
177 snprintf(buf, buf_size, "%s%s", ip, scope);
181 else if((res == IF2IP_NOT_FOUND) &&
182 curl_strequal(iface->ifa_name, interf)) {
183 res = IF2IP_AF_NOT_SUPPORTED;
194 #elif defined(HAVE_IOCTL_SIOCGIFADDR)
196 bool Curl_if_is_interface_name(const char *interf)
198 /* This is here just to support the old interfaces */
201 return (Curl_if2ip(AF_INET, 0 /* unused */, 0, interf, buf, sizeof(buf)) ==
202 IF2IP_NOT_FOUND) ? FALSE : TRUE;
205 if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope,
206 unsigned int remote_scope_id, const char *interf,
207 char *buf, int buf_size)
211 struct sockaddr_in *s;
216 (void)remote_scope_id;
218 if(!interf || (af != AF_INET))
219 return IF2IP_NOT_FOUND;
221 len = strlen(interf);
222 if(len >= sizeof(req.ifr_name))
223 return IF2IP_NOT_FOUND;
225 dummy = socket(AF_INET, SOCK_STREAM, 0);
226 if(CURL_SOCKET_BAD == dummy)
227 return IF2IP_NOT_FOUND;
229 memset(&req, 0, sizeof(req));
230 memcpy(req.ifr_name, interf, len+1);
231 req.ifr_addr.sa_family = AF_INET;
233 if(ioctl(dummy, SIOCGIFADDR, &req) < 0) {
235 /* With SIOCGIFADDR, we cannot tell the difference between an interface
236 that does not exist and an interface that has no address of the
237 correct family. Assume the interface does not exist */
238 return IF2IP_NOT_FOUND;
241 s = (struct sockaddr_in *)&req.ifr_addr;
242 memcpy(&in, &s->sin_addr, sizeof(in));
243 Curl_inet_ntop(s->sin_family, &in, buf, buf_size);
251 bool Curl_if_is_interface_name(const char *interf)
258 if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope,
259 unsigned int remote_scope_id, const char *interf,
260 char *buf, int buf_size)
264 (void) remote_scope_id;
268 return IF2IP_NOT_FOUND;