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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1986-2002 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <ctype.h> 30 #include <sys/types.h> 31 #include <sys/socket.h> 32 #include <netinet/in.h> 33 #include <arpa/inet.h> 34 #include <netdb.h> 35 #include <stdlib.h> 36 #include <string.h> 37 #include <nss_dbdefs.h> 38 39 40 static int str2netent(const char *, int, void *, char *, int); 41 42 static int net_stayopen; 43 /* 44 * Unsynchronized, but it affects only 45 * efficiency, not correctness 46 */ 47 48 static DEFINE_NSS_DB_ROOT(db_root); 49 static DEFINE_NSS_GETENT(context); 50 51 static void 52 _nss_initf_net(nss_db_params_t *p) 53 { 54 p->name = NSS_DBNAM_NETWORKS; 55 p->default_config = NSS_DEFCONF_NETWORKS; 56 } 57 58 struct netent * 59 getnetbyname_r(const char *name, struct netent *result, 60 char *buffer, int buflen) 61 { 62 nss_XbyY_args_t arg; 63 nss_status_t res; 64 65 NSS_XbyY_INIT(&arg, result, buffer, buflen, str2netent); 66 arg.key.name = name; 67 arg.stayopen = net_stayopen; 68 res = nss_search(&db_root, _nss_initf_net, 69 NSS_DBOP_NETWORKS_BYNAME, &arg); 70 arg.status = res; 71 (void) NSS_XbyY_FINI(&arg); 72 return ((struct netent *)arg.returnval); 73 } 74 75 struct netent * 76 getnetbyaddr_r(long net, int type, struct netent *result, 77 char *buffer, int buflen) 78 { 79 nss_XbyY_args_t arg; 80 nss_status_t res; 81 82 NSS_XbyY_INIT(&arg, result, buffer, buflen, str2netent); 83 arg.key.netaddr.net = (uint32_t)net; 84 arg.key.netaddr.type = type; 85 arg.stayopen = net_stayopen; 86 res = nss_search(&db_root, _nss_initf_net, 87 NSS_DBOP_NETWORKS_BYADDR, &arg); 88 arg.status = res; 89 (void) NSS_XbyY_FINI(&arg); 90 return ((struct netent *)arg.returnval); 91 } 92 93 int 94 setnetent(int stay) 95 { 96 net_stayopen |= stay; /* === Or maybe just "=" ? */ 97 nss_setent(&db_root, _nss_initf_net, &context); 98 return (0); 99 } 100 101 int 102 endnetent() 103 { 104 net_stayopen = 0; 105 nss_endent(&db_root, _nss_initf_net, &context); 106 nss_delete(&db_root); 107 return (0); 108 } 109 110 struct netent * 111 getnetent_r(struct netent *result, char *buffer, int buflen) 112 { 113 nss_XbyY_args_t arg; 114 nss_status_t res; 115 116 NSS_XbyY_INIT(&arg, result, buffer, buflen, str2netent); 117 /* No stayopen flag; of course you stay open for iteration */ 118 res = nss_getent(&db_root, _nss_initf_net, &context, &arg); 119 arg.status = res; 120 (void) NSS_XbyY_FINI(&arg); 121 return ((struct netent *)arg.returnval); 122 } 123 124 /* 125 * Return values: 0 = success, 1 = parse error, 2 = erange ... 126 * The structure pointer passed in is a structure in the caller's space 127 * wherein the field pointers would be set to areas in the buffer if 128 * need be. instring and buffer should be separate areas. 129 */ 130 static int 131 str2netent(const char *instr, int lenstr, 132 void *ent /* really (struct netnet *) */, char *buffer, int buflen) 133 { 134 struct netent *net = (struct netent *)ent; 135 const char *p, *numstart, *limit, *namestart; 136 int namelen = 0; 137 ptrdiff_t numlen; 138 char numbuf[16]; 139 140 if ((instr >= buffer && (buffer + buflen) > instr) || 141 (buffer >= instr && (instr + lenstr) > buffer)) { 142 return (NSS_STR_PARSE_PARSE); 143 } 144 145 p = instr; 146 limit = p + lenstr; 147 148 while (p < limit && isspace(*p)) { 149 p++; 150 } 151 namestart = p; 152 while (p < limit && !isspace(*p)) { 153 p++; /* Skip over the canonical name */ 154 } 155 namelen = (int)(p - namestart); 156 157 if (buflen <= namelen) { /* not enough buffer */ 158 return (NSS_STR_PARSE_ERANGE); 159 } 160 (void) memcpy(buffer, namestart, namelen); 161 buffer[namelen] = '\0'; 162 net->n_name = buffer; 163 164 while (p < limit && isspace(*p)) { 165 p++; 166 } 167 if (p >= limit) { 168 /* Syntax error -- no net number */ 169 return (NSS_STR_PARSE_PARSE); 170 } 171 numstart = p; 172 do { 173 p++; /* Find the end of the net number */ 174 } while (p < limit && !isspace(*p)); 175 numlen = p - numstart; 176 if (numlen >= (ptrdiff_t)sizeof (numbuf)) { 177 /* Syntax error -- supposed number is too long */ 178 return (NSS_STR_PARSE_PARSE); 179 } 180 (void) memcpy(numbuf, numstart, numlen); 181 numbuf[numlen] = '\0'; 182 net->n_net = inet_network(numbuf); 183 if (net->n_net == (in_addr_t)-1) { 184 /* inet_network failed to parse the string */ 185 return (NSS_STR_PARSE_PARSE); 186 } 187 188 net->n_addrtype = AF_INET; 189 190 while (p < limit && isspace(*p)) { 191 p++; 192 } 193 /* 194 * Although nss_files_XY_all calls us with # stripped, 195 * we should be able to deal with it here in order to 196 * be more useful. 197 */ 198 if (p >= limit || *p == '#') { /* no aliases, no problem */ 199 char **ptr; 200 201 ptr = (char **)ROUND_UP(buffer + namelen + 1, 202 sizeof (char *)); 203 if ((char *)ptr >= buffer + buflen) { 204 net->n_aliases = 0; /* hope they don't try to peek in */ 205 return (NSS_STR_PARSE_ERANGE); 206 } else { 207 *ptr = 0; 208 net->n_aliases = ptr; 209 return (NSS_STR_PARSE_SUCCESS); 210 } 211 } 212 net->n_aliases = _nss_netdb_aliases(p, lenstr - (int)(p - instr), 213 buffer + namelen + 1, buflen - namelen - 1); 214 return (NSS_STR_PARSE_SUCCESS); 215 } 216