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 /*LINTLIBRARY*/ 31 32 #include <stdio.h> 33 #include <stdlib.h> 34 #include <unistd.h> 35 #include <string.h> 36 #include <ctype.h> 37 #include <sys/types.h> 38 #include <papi.h> 39 #include <uri.h> 40 #include <config-site.h> 41 42 /* 43 * The implementations of strlcpy() and strlcat() have been taken directly 44 * from OpenSolaris. The contents of this file originated from 45 * usr/src/lib/libc/port/gen/strlcpy.c 46 * usr/src/lib/libc/port/gen/strcat.c 47 */ 48 49 #ifndef HAVE_STRLCPY 50 size_t 51 strlcpy(char *dst, const char *src, size_t len) 52 { 53 size_t slen = strlen(src); 54 size_t copied; 55 56 if (len == 0) 57 return (slen); 58 59 if (slen >= len) 60 copied = len - 1; 61 else 62 copied = slen; 63 (void) memcpy(dst, src, copied); 64 dst[copied] = '\0'; 65 return (slen); 66 } 67 #endif 68 69 #ifndef HAVE_STRLCAT 70 size_t 71 strlcat(char *dst, const char *src, size_t dstsize) 72 { 73 char *df = dst; 74 size_t left = dstsize; 75 size_t l1; 76 size_t l2 = strlen(src); 77 size_t copied; 78 79 while (left-- != 0 && *df != '\0') 80 df++; 81 l1 = df - dst; 82 if (dstsize == l1) 83 return (l1 + l2); 84 85 copied = l1 + l2 >= dstsize ? dstsize - l1 - 1 : l2; 86 (void) memcpy(dst + l1, src, copied); 87 dst[l1+copied] = '\0'; 88 return (l1 + l2); 89 } 90 #endif 91 92 #if defined(__sun) && defined(__SVR4) 93 #include <sys/systeminfo.h> 94 #include <sys/socket.h> 95 #include <sys/ioctl.h> 96 #include <sys/sockio.h> 97 #include <net/if.h> 98 #include <netinet/in.h> 99 #include <arpa/inet.h> 100 #include <netdb.h> 101 102 static struct in6_addr ** 103 local_interfaces() 104 { 105 struct in6_addr **result = NULL; 106 int s; 107 struct lifnum n; 108 struct lifconf c; 109 struct lifreq *r; 110 int count; 111 112 /* we need a socket to get the interfaces */ 113 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) 114 return (0); 115 116 /* get the number of interfaces */ 117 memset(&n, 0, sizeof (n)); 118 n.lifn_family = AF_UNSPEC; 119 if (ioctl(s, SIOCGLIFNUM, (char *)&n) < 0) { 120 close(s); 121 return (0); /* no interfaces */ 122 } 123 124 /* get the interface(s) configuration */ 125 memset(&c, 0, sizeof (c)); 126 c.lifc_family = AF_UNSPEC; 127 c.lifc_buf = calloc(n.lifn_count, sizeof (struct lifreq)); 128 c.lifc_len = (n.lifn_count * sizeof (struct lifreq)); 129 if (ioctl(s, SIOCGLIFCONF, (char *)&c) < 0) { 130 free(c.lifc_buf); 131 close(s); 132 return (0); /* can't get interface(s) configuration */ 133 } 134 close(s); 135 136 r = c.lifc_req; 137 for (count = c.lifc_len / sizeof (struct lifreq); 138 count > 0; count--, r++) { 139 struct in6_addr v6[1], *addr = NULL; 140 141 switch (r->lifr_addr.ss_family) { 142 case AF_INET: { 143 struct sockaddr_in *s = 144 (struct sockaddr_in *)&r->lifr_addr; 145 IN6_INADDR_TO_V4MAPPED(&s->sin_addr, v6); 146 addr = v6; 147 } 148 break; 149 case AF_INET6: { 150 struct sockaddr_in6 *s = 151 (struct sockaddr_in6 *)&r->lifr_addr; 152 addr = &s->sin6_addr; 153 } 154 break; 155 } 156 157 if (addr != NULL) { 158 struct in6_addr *a = malloc(sizeof (*a)); 159 160 memcpy(a, addr, sizeof (*a)); 161 list_append(&result, a); 162 } 163 } 164 free(c.lifc_buf); 165 166 return (result); 167 } 168 169 static int 170 match_interfaces(char *host) 171 { 172 struct in6_addr **lif = local_interfaces(); 173 struct hostent *hp; 174 int rc = 0; 175 int errnum; 176 177 /* are there any local interfaces */ 178 if (lif == NULL) 179 return (0); 180 181 /* cycle through the host db addresses */ 182 hp = getipnodebyname(host, AF_INET6, AI_ALL|AI_V4MAPPED, &errnum); 183 if (hp != NULL) { 184 struct in6_addr **tmp = (struct in6_addr **)hp->h_addr_list; 185 int i; 186 187 for (i = 0; ((rc == 0) && (tmp[i] != NULL)); i++) { 188 int j; 189 190 for (j = 0; ((rc == 0) && (lif[j] != NULL)); j++) 191 if (memcmp(tmp[i], lif[j], 192 sizeof (struct in6_addr)) == 0) 193 rc = 1; 194 } 195 } 196 free(lif); 197 198 return (rc); 199 } 200 #endif 201 202 int 203 is_localhost(char *host) 204 { 205 char hostname[BUFSIZ]; 206 207 /* is it "localhost" */ 208 if (strncasecmp(host, "localhost", 10) == 0) 209 return (1); 210 211 /* is it the {nodename} */ 212 sysinfo(SI_HOSTNAME, hostname, sizeof (hostname)); 213 if (strncasecmp(host, hostname, strlen(hostname)) == 0) 214 return (1); 215 216 #if defined(__sun) && defined(__SVR4) 217 /* does it match one of the host's configured interfaces */ 218 if (match_interfaces(host) != 0) 219 return (1); 220 #endif 221 return (0); 222 } 223