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 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <ctype.h> 27 #include <sys/types.h> 28 #include <sys/socket.h> 29 #include <netinet/in.h> 30 #include <arpa/inet.h> 31 #include <netdb.h> 32 #include <stdlib.h> 33 #include <string.h> 34 #include <nss_dbdefs.h> 35 36 37 int str2netent(const char *, int, void *, char *, int); 38 39 static int net_stayopen; 40 /* 41 * Unsynchronized, but it affects only 42 * efficiency, not correctness 43 */ 44 45 static DEFINE_NSS_DB_ROOT(db_root); 46 static DEFINE_NSS_GETENT(context); 47 48 void 49 _nss_initf_net(nss_db_params_t *p) 50 { 51 p->name = NSS_DBNAM_NETWORKS; 52 p->default_config = NSS_DEFCONF_NETWORKS; 53 } 54 55 struct netent * 56 getnetbyname_r(const char *name, struct netent *result, 57 char *buffer, int buflen) 58 { 59 nss_XbyY_args_t arg; 60 nss_status_t res; 61 62 if (name == (const char *)NULL) { 63 errno = ERANGE; 64 return (NULL); 65 } 66 NSS_XbyY_INIT(&arg, result, buffer, buflen, str2netent); 67 arg.key.name = name; 68 arg.stayopen = net_stayopen; 69 res = nss_search(&db_root, _nss_initf_net, 70 NSS_DBOP_NETWORKS_BYNAME, &arg); 71 arg.status = res; 72 (void) NSS_XbyY_FINI(&arg); 73 return ((struct netent *)arg.returnval); 74 } 75 76 struct netent * 77 getnetbyaddr_r(long net, int type, struct netent *result, 78 char *buffer, int buflen) 79 { 80 nss_XbyY_args_t arg; 81 nss_status_t res; 82 83 NSS_XbyY_INIT(&arg, result, buffer, buflen, str2netent); 84 arg.key.netaddr.net = (uint32_t)net; 85 arg.key.netaddr.type = type; 86 arg.stayopen = net_stayopen; 87 res = nss_search(&db_root, _nss_initf_net, 88 NSS_DBOP_NETWORKS_BYADDR, &arg); 89 arg.status = res; 90 (void) NSS_XbyY_FINI(&arg); 91 return ((struct netent *)arg.returnval); 92 } 93 94 int 95 setnetent(int stay) 96 { 97 net_stayopen |= stay; /* === Or maybe just "=" ? */ 98 nss_setent(&db_root, _nss_initf_net, &context); 99 return (0); 100 } 101 102 int 103 endnetent() 104 { 105 net_stayopen = 0; 106 nss_endent(&db_root, _nss_initf_net, &context); 107 nss_delete(&db_root); 108 return (0); 109 } 110 111 struct netent * 112 getnetent_r(struct netent *result, char *buffer, int buflen) 113 { 114 nss_XbyY_args_t arg; 115 nss_status_t res; 116 117 NSS_XbyY_INIT(&arg, result, buffer, buflen, str2netent); 118 /* No stayopen flag; of course you stay open for iteration */ 119 res = nss_getent(&db_root, _nss_initf_net, &context, &arg); 120 arg.status = res; 121 (void) NSS_XbyY_FINI(&arg); 122 return ((struct netent *)arg.returnval); 123 } 124 125 /* 126 * Return values: 0 = success, 1 = parse error, 2 = erange ... 127 * The structure pointer passed in is a structure in the caller's space 128 * wherein the field pointers would be set to areas in the buffer if 129 * need be. instring and buffer should be separate areas. 130 */ 131 int 132 str2netent(const char *instr, int lenstr, 133 void *ent /* really (struct netnet *) */, char *buffer, int buflen) 134 { 135 struct netent *net = (struct netent *)ent; 136 const char *p, *numstart, *limit, *namestart; 137 int namelen = 0; 138 ptrdiff_t numlen; 139 char numbuf[16]; 140 141 if ((instr >= buffer && (buffer + buflen) > instr) || 142 (buffer >= instr && (instr + lenstr) > buffer)) { 143 return (NSS_STR_PARSE_PARSE); 144 } 145 146 p = instr; 147 limit = p + lenstr; 148 149 while (p < limit && isspace(*p)) { 150 p++; 151 } 152 namestart = p; 153 while (p < limit && !isspace(*p)) { 154 p++; /* Skip over the canonical name */ 155 } 156 namelen = (int)(p - namestart); 157 158 if (buflen <= namelen) { /* not enough buffer */ 159 return (NSS_STR_PARSE_ERANGE); 160 } 161 (void) memcpy(buffer, namestart, namelen); 162 buffer[namelen] = '\0'; 163 net->n_name = buffer; 164 165 while (p < limit && isspace(*p)) { 166 p++; 167 } 168 if (p >= limit) { 169 /* Syntax error -- no net number */ 170 return (NSS_STR_PARSE_PARSE); 171 } 172 numstart = p; 173 do { 174 p++; /* Find the end of the net number */ 175 } while (p < limit && !isspace(*p)); 176 numlen = p - numstart; 177 if (numlen >= (ptrdiff_t)sizeof (numbuf)) { 178 /* Syntax error -- supposed number is too long */ 179 return (NSS_STR_PARSE_PARSE); 180 } 181 (void) memcpy(numbuf, numstart, numlen); 182 numbuf[numlen] = '\0'; 183 net->n_net = inet_network(numbuf); 184 if (net->n_net == (in_addr_t)-1) { 185 /* inet_network failed to parse the string */ 186 return (NSS_STR_PARSE_PARSE); 187 } 188 189 net->n_addrtype = AF_INET; 190 191 while (p < limit && isspace(*p)) { 192 p++; 193 } 194 /* 195 * Although nss_files_XY_all calls us with # stripped, 196 * we should be able to deal with it here in order to 197 * be more useful. 198 */ 199 if (p >= limit || *p == '#') { /* no aliases, no problem */ 200 char **ptr; 201 202 ptr = (char **)ROUND_UP(buffer + namelen + 1, 203 sizeof (char *)); 204 if ((char *)ptr >= buffer + buflen) { 205 net->n_aliases = 0; /* hope they don't try to peek in */ 206 return (NSS_STR_PARSE_ERANGE); 207 } else { 208 *ptr = 0; 209 net->n_aliases = ptr; 210 return (NSS_STR_PARSE_SUCCESS); 211 } 212 } 213 net->n_aliases = _nss_netdb_aliases(p, lenstr - (int)(p - instr), 214 buffer + namelen + 1, buflen - namelen - 1); 215 return (NSS_STR_PARSE_SUCCESS); 216 } 217