1/***************************************************************************
2 *                                  _   _ ____  _
3 *  Project                     ___| | | |  _ \| |
4 *                             / __| | | | |_) | |
5 *                            | (__| |_| |  _ <| |___
6 *                             \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
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.
13 *
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.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22
23#include "setup.h"
24
25#ifdef HAVE_UNISTD_H
26#  include <unistd.h>
27#endif
28#ifdef HAVE_SYS_SOCKET_H
29#  include <sys/socket.h>
30#endif
31#ifdef HAVE_NETINET_IN_H
32#  include <netinet/in.h>
33#endif
34#ifdef HAVE_ARPA_INET_H
35#  include <arpa/inet.h>
36#endif
37#ifdef HAVE_NET_IF_H
38#  include <net/if.h>
39#endif
40#ifdef HAVE_SYS_IOCTL_H
41#  include <sys/ioctl.h>
42#endif
43#ifdef HAVE_NETDB_H
44#  include <netdb.h>
45#endif
46#ifdef HAVE_SYS_SOCKIO_H
47#  include <sys/sockio.h>
48#endif
49#ifdef HAVE_IFADDRS_H
50#  include <ifaddrs.h>
51#endif
52#ifdef HAVE_STROPTS_H
53#  include <stropts.h>
54#endif
55#ifdef __VMS
56#  include <inet.h>
57#endif
58
59#include "inet_ntop.h"
60#include "strequal.h"
61#include "if2ip.h"
62
63#define _MPRINTF_REPLACE /* use our functions only */
64#include <curl/mprintf.h>
65
66#include "curl_memory.h"
67/* The last #include file should be: */
68#include "memdebug.h"
69
70/* ------------------------------------------------------------------ */
71
72#if defined(HAVE_GETIFADDRS)
73
74char *Curl_if2ip(int af, const char *interface, char *buf, int buf_size)
75{
76  struct ifaddrs *iface, *head;
77  char *ip=NULL;
78
79  if(getifaddrs(&head) >= 0) {
80    for(iface=head; iface != NULL; iface=iface->ifa_next) {
81      if((iface->ifa_addr != NULL) &&
82         (iface->ifa_addr->sa_family == af) &&
83         curl_strequal(iface->ifa_name, interface)) {
84        void *addr;
85        char scope[12]="";
86#ifdef ENABLE_IPV6
87        if(af == AF_INET6) {
88          unsigned int scopeid = 0;
89          addr = &((struct sockaddr_in6 *)iface->ifa_addr)->sin6_addr;
90#ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
91          /* Include the scope of this interface as part of the address */
92          scopeid = ((struct sockaddr_in6 *)iface->ifa_addr)->sin6_scope_id;
93#endif
94          if(scopeid)
95            snprintf(scope, sizeof(scope), "%%%u", scopeid);
96        }
97        else
98#endif
99          addr = &((struct sockaddr_in *)iface->ifa_addr)->sin_addr;
100        ip = (char *) Curl_inet_ntop(af, addr, buf, buf_size);
101        strlcat(buf, scope, buf_size);
102        break;
103      }
104    }
105    freeifaddrs(head);
106  }
107  return ip;
108}
109
110#elif defined(HAVE_IOCTL_SIOCGIFADDR)
111
112char *Curl_if2ip(int af, const char *interface, char *buf, int buf_size)
113{
114  struct ifreq req;
115  struct in_addr in;
116  struct sockaddr_in *s;
117  curl_socket_t dummy;
118  size_t len;
119  char *ip;
120
121  if(!interface || (af != AF_INET))
122    return NULL;
123
124  len = strlen(interface);
125  if(len >= sizeof(req.ifr_name))
126    return NULL;
127
128  dummy = socket(AF_INET, SOCK_STREAM, 0);
129  if(CURL_SOCKET_BAD == dummy)
130    return NULL;
131
132  memset(&req, 0, sizeof(req));
133  memcpy(req.ifr_name, interface, len+1);
134  req.ifr_addr.sa_family = AF_INET;
135
136  if(ioctl(dummy, SIOCGIFADDR, &req) < 0) {
137    sclose(dummy);
138    return NULL;
139  }
140
141  s = (struct sockaddr_in *)&req.ifr_addr;
142  memcpy(&in, &s->sin_addr, sizeof(in));
143  ip = (char *) Curl_inet_ntop(s->sin_family, &in, buf, buf_size);
144
145  sclose(dummy);
146  return ip;
147}
148
149#else
150
151char *Curl_if2ip(int af, const char *interf, char *buf, int buf_size)
152{
153    (void) af;
154    (void) interf;
155    (void) buf;
156    (void) buf_size;
157    return NULL;
158}
159
160#endif
161