2 * Copyright (c) 1996, 1998-2005, 2007-2011
3 * Todd C. Miller <Todd.Miller@courtesan.com>
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
17 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
19 * Sponsored in part by the Defense Advanced Research Projects
20 * Agency (DARPA) and Air Force Research Laboratory, Air Force
21 * Materiel Command, USAF, under agreement number F39502-99-1-0512.
26 #include <sys/types.h>
27 #include <sys/socket.h>
36 #endif /* STDC_HEADERS */
39 #endif /* HAVE_STRING_H */
42 #endif /* HAVE_STRINGS_H */
45 #endif /* HAVE_UNISTD_H */
46 #include <netinet/in.h>
47 #include <arpa/inet.h>
51 #include "interfaces.h"
54 addr_matches_if(char *n)
56 union sudo_in_addr_un addr;
57 struct interface *ifp;
58 #ifdef HAVE_STRUCT_IN6_ADDR
62 debug_decl(addr_matches_if, SUDO_DEBUG_MATCH)
64 #ifdef HAVE_STRUCT_IN6_ADDR
65 if (inet_pton(AF_INET6, n, &addr.ip6) > 0) {
68 #endif /* HAVE_STRUCT_IN6_ADDR */
71 addr.ip4.s_addr = inet_addr(n);
74 for (ifp = interfaces; ifp != NULL; ifp = ifp->next) {
75 if (ifp->family != family)
79 if (ifp->addr.ip4.s_addr == addr.ip4.s_addr ||
80 (ifp->addr.ip4.s_addr & ifp->netmask.ip4.s_addr)
82 debug_return_bool(true);
84 #ifdef HAVE_STRUCT_IN6_ADDR
86 if (memcmp(ifp->addr.ip6.s6_addr, addr.ip6.s6_addr,
87 sizeof(addr.ip6.s6_addr)) == 0)
88 debug_return_bool(true);
89 for (j = 0; j < sizeof(addr.ip6.s6_addr); j++) {
90 if ((ifp->addr.ip6.s6_addr[j] & ifp->netmask.ip6.s6_addr[j]) != addr.ip6.s6_addr[j])
93 if (j == sizeof(addr.ip6.s6_addr))
94 debug_return_bool(true);
96 #endif /* HAVE_STRUCT_IN6_ADDR */
100 debug_return_bool(false);
104 addr_matches_if_netmask(char *n, char *m)
107 union sudo_in_addr_un addr, mask;
108 struct interface *ifp;
109 #ifdef HAVE_STRUCT_IN6_ADDR
113 debug_decl(addr_matches_if, SUDO_DEBUG_MATCH)
115 #ifdef HAVE_STRUCT_IN6_ADDR
116 if (inet_pton(AF_INET6, n, &addr.ip6) > 0)
119 #endif /* HAVE_STRUCT_IN6_ADDR */
122 addr.ip4.s_addr = inet_addr(n);
125 if (family == AF_INET) {
126 if (strchr(m, '.')) {
127 mask.ip4.s_addr = inet_addr(m);
133 mask.ip4.s_addr = 0xffffffff;
135 mask.ip4.s_addr = 0xffffffff - (1 << (32 - i)) + 1;
136 mask.ip4.s_addr = htonl(mask.ip4.s_addr);
138 addr.ip4.s_addr &= mask.ip4.s_addr;
140 #ifdef HAVE_STRUCT_IN6_ADDR
142 if (inet_pton(AF_INET6, m, &mask.ip6) <= 0) {
144 for (i = 0; i < sizeof(addr.ip6.s6_addr); i++) {
146 mask.ip6.s6_addr[i] = 0;
147 else if (i * 8 + 8 <= j)
148 mask.ip6.s6_addr[i] = 0xff;
150 mask.ip6.s6_addr[i] = 0xff00 >> (j - i * 8);
151 addr.ip6.s6_addr[i] &= mask.ip6.s6_addr[i];
155 #endif /* HAVE_STRUCT_IN6_ADDR */
157 for (ifp = interfaces; ifp != NULL; ifp = ifp->next) {
158 if (ifp->family != family)
162 if ((ifp->addr.ip4.s_addr & mask.ip4.s_addr) == addr.ip4.s_addr)
163 debug_return_bool(true);
165 #ifdef HAVE_STRUCT_IN6_ADDR
167 for (j = 0; j < sizeof(addr.ip6.s6_addr); j++) {
168 if ((ifp->addr.ip6.s6_addr[j] & mask.ip6.s6_addr[j]) != addr.ip6.s6_addr[j])
171 if (j == sizeof(addr.ip6.s6_addr))
172 debug_return_bool(true);
174 #endif /* HAVE_STRUCT_IN6_ADDR */
178 debug_return_bool(false);
182 * Returns true if "n" is one of our ip addresses or if
183 * "n" is a network that we are on, else returns false.
186 addr_matches(char *n)
190 debug_decl(addr_matches, SUDO_DEBUG_MATCH)
192 /* If there's an explicit netmask, use it. */
193 if ((m = strchr(n, '/'))) {
195 retval = addr_matches_if_netmask(n, m);
198 retval = addr_matches_if(n);
200 debug_return_bool(retval);