summaryrefslogtreecommitdiff
path: root/lib/if2ip.c
blob: b4a98c66257d538bc2e0b3612a3b5f08d36e88a4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2006, Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at http://curl.haxx.se/docs/copyright.html.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 * $Id$
 ***************************************************************************/

#include "setup.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#include "if2ip.h"

/*
 * This test can probably be simplified to #if defined(SIOCGIFADDR) and
 * moved after the following includes.
 */
#if !defined(WIN32) && !defined(__BEOS__) && !defined(__CYGWIN__) && \
    !defined(__riscos__) && !defined(__INTERIX) && !defined(NETWARE) && \
    !defined(_AMIGASF) && !defined(__minix)

#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif

#ifdef HAVE_SYS_TIME_H
/* This must be before net/if.h for AIX 3.2 to enjoy life */
#include <sys/time.h>
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif

#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif

#ifdef HAVE_SYS_SOCKIO_H
#include <sys/sockio.h>
#endif

#ifdef VMS
#include <inet.h>
#endif

#include "inet_ntop.h"
#include "memory.h"

/* The last #include file should be: */
#include "memdebug.h"

#define SYS_ERROR -1

char *Curl_if2ip(const char *interface, char *buf, int buf_size)
{
  int dummy;
  char *ip=NULL;

  if(!interface)
    return NULL;

  dummy = socket(AF_INET, SOCK_STREAM, 0);
  if (SYS_ERROR == dummy) {
    return NULL;
  }
  else {
    struct ifreq req;
    size_t len = strlen(interface);
    memset(&req, 0, sizeof(req));
    if(len >= sizeof(req.ifr_name))
      return NULL; /* this can't be a fine interface name */
    memcpy(req.ifr_name, interface, len+1);
    req.ifr_addr.sa_family = AF_INET;
#ifdef IOCTL_3_ARGS
    if (SYS_ERROR == ioctl(dummy, SIOCGIFADDR, &req)) {
#else
    if (SYS_ERROR == ioctl(dummy, SIOCGIFADDR, &req, sizeof(req))) {
#endif
      sclose(dummy);
      return NULL;
    }
    else {
      struct in_addr in;

      struct sockaddr_in *s = (struct sockaddr_in *)&req.ifr_dstaddr;
      memcpy(&in, &s->sin_addr, sizeof(in));
      ip = (char *) Curl_inet_ntop(s->sin_family, &in, buf, buf_size);
    }
    sclose(dummy);
  }
  return ip;
}

/* -- end of if2ip() -- */
#else
char *Curl_if2ip(const char *interf, char *buf, int buf_size)
{
    (void) interf;
    (void) buf;
    (void) buf_size;
    return NULL;
}
#endif