1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 *
26 */
27
28 /* $Id: misc.c 146 2006-03-24 00:26:54Z njacobs $ */
29
30 #pragma ident "%Z%%M% %I% %E% SMI"
31
32 /*LINTLIBRARY*/
33
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <unistd.h>
37 #include <string.h>
38 #include <ctype.h>
39 #include <sys/types.h>
40 #include <papi.h>
41 #include <uri.h>
42 #include <config-site.h>
43
44 /*
45 * The implementations of strlcpy() and strlcat() have been taken directly
46 * from OpenSolaris. The contents of this file originated from
47 * usr/src/lib/libc/port/gen/strlcpy.c
48 * usr/src/lib/libc/port/gen/strcat.c
49 */
50
51 #ifndef HAVE_STRLCPY
52 size_t
strlcpy(char * dst,const char * src,size_t len)53 strlcpy(char *dst, const char *src, size_t len)
54 {
55 size_t slen = strlen(src);
56 size_t copied;
57
58 if (len == 0)
59 return (slen);
60
61 if (slen >= len)
62 copied = len - 1;
63 else
64 copied = slen;
65 (void) memcpy(dst, src, copied);
66 dst[copied] = '\0';
67 return (slen);
68 }
69 #endif
70
71 #ifndef HAVE_STRLCAT
72 size_t
strlcat(char * dst,const char * src,size_t dstsize)73 strlcat(char *dst, const char *src, size_t dstsize)
74 {
75 char *df = dst;
76 size_t left = dstsize;
77 size_t l1;
78 size_t l2 = strlen(src);
79 size_t copied;
80
81 while (left-- != 0 && *df != '\0')
82 df++;
83 l1 = df - dst;
84 if (dstsize == l1)
85 return (l1 + l2);
86
87 copied = l1 + l2 >= dstsize ? dstsize - l1 - 1 : l2;
88 (void) memcpy(dst + l1, src, copied);
89 dst[l1+copied] = '\0';
90 return (l1 + l2);
91 }
92 #endif
93
94 #if defined(__sun) && defined(__SVR4)
95 #include <sys/systeminfo.h>
96 #include <sys/socket.h>
97 #include <sys/ioctl.h>
98 #include <sys/sockio.h>
99 #include <net/if.h>
100 #include <netinet/in.h>
101 #include <arpa/inet.h>
102 #include <netdb.h>
103
104 static struct in6_addr **
local_interfaces()105 local_interfaces()
106 {
107 struct in6_addr **result = NULL;
108 int s;
109 struct lifnum n;
110 struct lifconf c;
111 struct lifreq *r;
112 int count;
113
114 /* we need a socket to get the interfaces */
115 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
116 return (0);
117
118 /* get the number of interfaces */
119 memset(&n, 0, sizeof (n));
120 n.lifn_family = AF_UNSPEC;
121 if (ioctl(s, SIOCGLIFNUM, (char *)&n) < 0) {
122 close(s);
123 return (0); /* no interfaces */
124 }
125
126 /* get the interface(s) configuration */
127 memset(&c, 0, sizeof (c));
128 c.lifc_family = AF_UNSPEC;
129 c.lifc_buf = calloc(n.lifn_count, sizeof (struct lifreq));
130 c.lifc_len = (n.lifn_count * sizeof (struct lifreq));
131 if (ioctl(s, SIOCGLIFCONF, (char *)&c) < 0) {
132 free(c.lifc_buf);
133 close(s);
134 return (0); /* can't get interface(s) configuration */
135 }
136 close(s);
137
138 r = c.lifc_req;
139 for (count = c.lifc_len / sizeof (struct lifreq);
140 count > 0; count--, r++) {
141 struct in6_addr v6[1], *addr = NULL;
142
143 switch (r->lifr_addr.ss_family) {
144 case AF_INET: {
145 struct sockaddr_in *s =
146 (struct sockaddr_in *)&r->lifr_addr;
147 IN6_INADDR_TO_V4MAPPED(&s->sin_addr, v6);
148 addr = v6;
149 }
150 break;
151 case AF_INET6: {
152 struct sockaddr_in6 *s =
153 (struct sockaddr_in6 *)&r->lifr_addr;
154 addr = &s->sin6_addr;
155 }
156 break;
157 }
158
159 if (addr != NULL) {
160 struct in6_addr *a = malloc(sizeof (*a));
161
162 memcpy(a, addr, sizeof (*a));
163 list_append(&result, a);
164 }
165 }
166 free(c.lifc_buf);
167
168 return (result);
169 }
170
171 static int
match_interfaces(char * host)172 match_interfaces(char *host)
173 {
174 struct in6_addr **lif = local_interfaces();
175 struct hostent *hp;
176 int rc = 0;
177 int errnum;
178
179 /* are there any local interfaces */
180 if (lif == NULL)
181 return (0);
182
183 /* cycle through the host db addresses */
184 hp = getipnodebyname(host, AF_INET6, AI_ALL|AI_V4MAPPED, &errnum);
185 if (hp != NULL) {
186 struct in6_addr **tmp = (struct in6_addr **)hp->h_addr_list;
187 int i;
188
189 for (i = 0; ((rc == 0) && (tmp[i] != NULL)); i++) {
190 int j;
191
192 for (j = 0; ((rc == 0) && (lif[j] != NULL)); j++)
193 if (memcmp(tmp[i], lif[j],
194 sizeof (struct in6_addr)) == 0)
195 rc = 1;
196 }
197 }
198 free(lif);
199
200 return (rc);
201 }
202 #endif
203
204 int
is_localhost(char * host)205 is_localhost(char *host)
206 {
207 char hostname[BUFSIZ];
208
209 /* is it "localhost" */
210 if (strncasecmp(host, "localhost", 10) == 0)
211 return (1);
212
213 /* is it the {nodename} */
214 sysinfo(SI_HOSTNAME, hostname, sizeof (hostname));
215 if (strncasecmp(host, hostname, strlen(hostname)) == 0)
216 return (1);
217
218 #if defined(__sun) && defined(__SVR4)
219 /* does it match one of the host's configured interfaces */
220 if (match_interfaces(host) != 0)
221 return (1);
222 #endif
223 return (0);
224 }
225