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comparison dcclib/getifaddrs.c @ 0:c7f6b056b673

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First import of vendor version
author Peter Gervai <grin@grin.hu>
date Tue, 10 Mar 2009 13:49:58 +0100
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-1:000000000000 0:c7f6b056b673
1 /* Distributed Checksum Clearinghouse
2 *
3 * kludge replacement for getifaddrs(3) for systems that lack it
4 *
5 * Copyright (c) 2008 by Rhyolite Software, LLC
6 *
7 * This agreement is not applicable to any entity which sells anti-spam
8 * solutions to others or provides an anti-spam solution as part of a
9 * security solution sold to other entities, or to a private network
10 * which employs the DCC or uses data provided by operation of the DCC
11 * but does not provide corresponding data to other users.
12 *
13 * Permission to use, copy, modify, and distribute this software without
14 * changes for any purpose with or without fee is hereby granted, provided
15 * that the above copyright notice and this permission notice appear in all
16 * copies and any distributed versions or copies are either unchanged
17 * or not called anything similar to "DCC" or "Distributed Checksum
18 * Clearinghouse".
19 *
20 * Parties not eligible to receive a license under this agreement can
21 * obtain a commercial license to use DCC by contacting Rhyolite Software
22 * at sales@rhyolite.com.
23 *
24 * A commercial license would be for Distributed Checksum and Reputation
25 * Clearinghouse software. That software includes additional features. This
26 * free license for Distributed ChecksumClearinghouse Software does not in any
27 * way grant permision to use Distributed Checksum and Reputation Clearinghouse
28 * software
29 *
30 * THE SOFTWARE IS PROVIDED "AS IS" AND RHYOLITE SOFTWARE, LLC DISCLAIMS ALL
31 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
32 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL RHYOLITE SOFTWARE, LLC
33 * BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES
34 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
35 * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
36 * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
37 * SOFTWARE.
38 *
39 * Rhyolite Software DCC 1.3.103-1.19 $Revision$
40 */
41
42
43 /* let the configure script decide if this might work */
44 #ifndef TEST_DCC_GETIFADDRS
45 #include "dcc_config.h"
46 #endif
47
48 #ifndef USE_DCC_GETIFADDRS
49 /* global to suppress "defined but not used" warning */
50 char dcc_getifaddrs_unneeded[] = "dcc_getifaddrs() unneeded";
51
52 #else
53
54 #include <sys/types.h>
55 #define BSD_COMP /* for SunOS */
56 #define _IO_TERMIOS_H /* kludge for OpenUNIX */
57 #include <sys/ioctl.h>
58 #include <sys/socket.h>
59 #include <net/if.h>
60 #include <unistd.h>
61 #include "dcc_defs.h"
62 #include "dcc_heap_debug.h"
63 #include "dcc_ifaddrs.h"
64
65 #include <errno.h>
66 #include <stdlib.h>
67 #include <string.h>
68
69 int
70 dcc_getifaddrs(struct ifaddrs **pif)
71 {
72 struct ifconf ifc;
73 int buf_size;
74 char *buf;
75 struct ifreq *ifrp, *ifrp_next, ifr_f;
76 struct ifaddrs_all *result0, *result, *rp;
77 int i, serrno, s;
78
79 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
80 return -1;
81
82 /* get the list of interface names and addresses */
83 buf_size = 1024;
84 for (;;) {
85 buf = dcc_malloc(buf_size);
86 if (!buf) {
87 serrno = errno;
88 close(s);
89 errno = serrno;
90 return -1;
91 }
92 ifc.ifc_buf = buf;
93 ifc.ifc_len = buf_size;
94 memset(buf, 0, buf_size);
95 if (0 > ioctl(s, SIOCGIFCONF, (char *)&ifc)
96 && errno != EINVAL) {
97 serrno = errno;
98 close(s);
99 errno = serrno;
100 *pif = 0;
101 return -1;
102 }
103 if (ifc.ifc_len < buf_size && ifc.ifc_len != 0)
104 break;
105 dcc_free(buf);
106 buf_size *= 2;
107 }
108
109 i = (ifc.ifc_len/sizeof(struct ifreq)) * sizeof(*result);
110 result = (struct ifaddrs_all *)dcc_malloc(i);
111 if (!result) {
112 serrno = errno;
113 dcc_free(buf);
114 close(s);
115 errno = serrno;
116 *pif = 0;
117 return -1;
118 }
119 memset(result, 0, i);
120 result0 = result;
121 *pif = &result->ifa;
122
123 for (ifrp = ifc.ifc_req;
124 (void *)ifrp < (void *)&ifc.ifc_buf[ifc.ifc_len];
125 ifrp = ifrp_next) {
126 #ifdef HAVE_SA_LEN
127 i = ifrp->ifr_addr.sa_len + sizeof(ifrp->ifr_name);
128 if (i < (int)sizeof(*ifrp))
129 ifrp_next = ifrp + 1;
130 else
131 ifrp_next = (struct ifreq *)((char *)ifrp + i);
132 #else
133 ifrp_next = ifrp + 1;
134 #endif
135
136 if (ifrp->ifr_addr.sa_family != AF_INET
137 #ifdef AF_INET6
138 && ifrp->ifr_addr.sa_family != AF_INET6
139 #endif
140 )
141 continue;
142
143 strncpy(ifr_f.ifr_name, ifrp->ifr_name, sizeof(ifr_f.ifr_name));
144 if (0 > ioctl(s, SIOCGIFFLAGS, (char *)&ifr_f)) {
145 if (errno == ENXIO)
146 continue;
147 serrno = errno;
148 close(s);
149 dcc_free(buf);
150 dcc_free(*pif);
151 *pif = 0;
152 errno = serrno;
153 return -1;
154 }
155
156 /* save the name only for debugging */
157 strncpy(result->name, ifrp->ifr_name, sizeof(result->name));
158 result->ifa.ifa_name = result->name;
159
160 result->addr.sa = ifrp->ifr_addr;
161 result->ifa.ifa_addr = &result->addr.sa;
162 result->ifa.ifa_flags = ifr_f.ifr_flags;
163 result->ifa.ifa_next = &(result+1)->ifa;
164
165 /* skip duplicate addresses */
166 rp = result0;
167 for (;;) {
168 if (rp >= result) {
169 ++result;
170 break;
171 }
172 if (DCC_SU_EQ(&rp->addr, &result->addr))
173 break;
174 ++rp;
175 }
176 }
177
178 if (&result->ifa == *pif) {
179 *pif = 0;
180 } else {
181 (result-1)->ifa.ifa_next = 0;
182 }
183 dcc_free(buf);
184 close(s);
185
186 return 0;
187 }
188 #endif /* USE_DCC_GETIFADDRS */