]> git.saurik.com Git - apple/network_cmds.git/blame - traceroute.tproj/ifaddrlist.c
network_cmds-245.19.tar.gz
[apple/network_cmds.git] / traceroute.tproj / ifaddrlist.c
CommitLineData
2b484d24
A
1/*
2 * Copyright (c) 1997, 1998, 1999, 2000
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the Computer Systems
16 * Engineering Group at Lawrence Berkeley Laboratory.
17 * 4. Neither the name of the University nor of the Laboratory may be used
18 * to endorse or promote products derived from this software without
19 * specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static const char rcsid[] =
36 "@(#) $Id: ifaddrlist.c,v 1.2 2004/08/08 00:27:54 lindak Exp $ (LBL)";
37#endif
38
39#include <sys/param.h>
40#include <sys/file.h>
41#include <sys/ioctl.h>
42#include <sys/socket.h>
43#ifdef HAVE_SYS_SOCKIO_H
44#include <sys/sockio.h>
45#endif
46#include <sys/time.h> /* concession to AIX */
47
48#if __STDC__
49struct mbuf;
50struct rtentry;
51#endif
52
53#include <net/if.h>
54#include <netinet/in.h>
55
56#include <ctype.h>
57#include <errno.h>
58#include <memory.h>
59#include <stdio.h>
60#include <stdlib.h>
61#include <string.h>
62#include <unistd.h>
63
64#include "gnuc.h"
65#ifdef HAVE_OS_PROTO_H
66#include "os-proto.h"
67#endif
68
69#include "ifaddrlist.h"
70
71/*
72 * Return the interface list
73 */
74int
75ifaddrlist(register struct ifaddrlist **ipaddrp, register char *errbuf)
76{
77 register int fd, nipaddr;
78#ifdef HAVE_SOCKADDR_SA_LEN
79 register int n;
80#endif
81 register struct ifreq *ifrp, *ifend, *ifnext, *mp;
82 register struct sockaddr_in *sin;
83 register struct ifaddrlist *al;
84 struct ifconf ifc;
85 struct ifreq ibuf[(32 * 1024) / sizeof(struct ifreq)], ifr;
86#define MAX_IPADDR (sizeof(ibuf) / sizeof(ibuf[0]))
87 static struct ifaddrlist ifaddrlist[MAX_IPADDR];
88 char device[sizeof(ifr.ifr_name) + 1];
89
90 fd = socket(AF_INET, SOCK_DGRAM, 0);
91 if (fd < 0) {
92 (void)sprintf(errbuf, "socket: %s", strerror(errno));
93 return (-1);
94 }
95 ifc.ifc_len = sizeof(ibuf);
96 ifc.ifc_buf = (caddr_t)ibuf;
97
98 if (ioctl(fd, SIOCGIFCONF, (char *)&ifc) < 0 ||
99 ifc.ifc_len < sizeof(struct ifreq)) {
100 if (errno == EINVAL)
101 (void)sprintf(errbuf,
102 "SIOCGIFCONF: ifreq struct too small (%d bytes)",
103 sizeof(ibuf));
104 else
105 (void)sprintf(errbuf, "SIOCGIFCONF: %s",
106 strerror(errno));
107 (void)close(fd);
108 return (-1);
109 }
110 ifrp = ibuf;
111 ifend = (struct ifreq *)((char *)ibuf + ifc.ifc_len);
112
113 al = ifaddrlist;
114 mp = NULL;
115 nipaddr = 0;
116 for (; ifrp < ifend; ifrp = ifnext) {
117#ifdef HAVE_SOCKADDR_SA_LEN
118 n = ifrp->ifr_addr.sa_len + sizeof(ifrp->ifr_name);
119 if (n < sizeof(*ifrp))
120 ifnext = ifrp + 1;
121 else
122 ifnext = (struct ifreq *)((char *)ifrp + n);
123 if (ifrp->ifr_addr.sa_family != AF_INET)
124 continue;
125#else
126 ifnext = ifrp + 1;
127#endif
128 /*
129 * Need a template to preserve address info that is
130 * used below to locate the next entry. (Otherwise,
131 * SIOCGIFFLAGS stomps over it because the requests
132 * are returned in a union.)
133 */
134 strncpy(ifr.ifr_name, ifrp->ifr_name, sizeof(ifr.ifr_name));
135 if (ioctl(fd, SIOCGIFFLAGS, (char *)&ifr) < 0) {
136 if (errno == ENXIO)
137 continue;
138 (void)sprintf(errbuf, "SIOCGIFFLAGS: %.*s: %s",
139 (int)sizeof(ifr.ifr_name), ifr.ifr_name,
140 strerror(errno));
141 (void)close(fd);
142 return (-1);
143 }
144
145 /* Must be up */
146 if ((ifr.ifr_flags & IFF_UP) == 0)
147 continue;
148
149
150 (void)strncpy(device, ifr.ifr_name, sizeof(ifr.ifr_name));
151 device[sizeof(device) - 1] = '\0';
152#ifdef sun
153 /* Ignore sun virtual interfaces */
154 if (strchr(device, ':') != NULL)
155 continue;
156#endif
157 if (ioctl(fd, SIOCGIFADDR, (char *)&ifr) < 0) {
158 (void)sprintf(errbuf, "SIOCGIFADDR: %s: %s",
159 device, strerror(errno));
160 (void)close(fd);
161 return (-1);
162 }
163
164 if (nipaddr >= MAX_IPADDR) {
165 (void)sprintf(errbuf, "Too many interfaces (%d)",
166 MAX_IPADDR);
167 (void)close(fd);
168 return (-1);
169 }
170 sin = (struct sockaddr_in *)&ifr.ifr_addr;
171 al->addr = sin->sin_addr.s_addr;
172 al->device = strdup(device);
173 ++al;
174 ++nipaddr;
175 }
176 (void)close(fd);
177
178 *ipaddrp = ifaddrlist;
179 return (nipaddr);
180}