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 * files/getservent.c -- "files" backend for nsswitch "services" database 26 */ 27 28 #pragma ident "%Z%%M% %I% %E% SMI" 29 30 #include <netdb.h> 31 #include "files_common.h" 32 #include <sys/types.h> 33 #include <netinet/in.h> 34 #include <inttypes.h> 35 #include <strings.h> 36 #include <ctype.h> 37 #include <stdlib.h> 38 39 static int 40 check_name(nss_XbyY_args_t *argp, const char *line, int linelen) 41 { 42 const char *limit, *linep, *keyp; 43 int name_match = 0; 44 45 linep = line; 46 limit = line + linelen; 47 keyp = argp->key.serv.serv.name; 48 49 /* compare name */ 50 while (*keyp && linep < limit && !isspace(*linep) && *keyp == *linep) { 51 keyp++; 52 linep++; 53 } 54 if (*keyp == '\0' && linep < limit && isspace(*linep)) { 55 if (argp->key.serv.proto == NULL) 56 return (1); 57 else 58 name_match = 1; 59 } 60 61 /* skip remainder of the name, if any */ 62 while (linep < limit && !isspace(*linep)) 63 linep++; 64 /* skip the delimiting spaces */ 65 while (linep < limit && isspace(*linep)) 66 linep++; 67 /* skip port number */ 68 while (linep < limit && !isspace(*linep) && *linep != '/') 69 linep++; 70 if (linep == limit || *linep != '/') 71 return (0); 72 73 linep++; 74 if ((keyp = argp->key.serv.proto) == NULL) { 75 /* skip protocol */ 76 while (linep < limit && !isspace(*linep)) 77 linep++; 78 } else { 79 /* compare protocol */ 80 while (*keyp && linep < limit && !isspace(*linep) && 81 *keyp == *linep) { 82 keyp++; 83 linep++; 84 } 85 /* no protocol match */ 86 if (*keyp || (linep < limit && !isspace(*linep))) 87 return (0); 88 /* protocol and name match, return */ 89 if (name_match) 90 return (1); 91 /* protocol match but name yet to be matched, so continue */ 92 } 93 94 /* compare with the aliases */ 95 while (linep < limit) { 96 /* skip the delimiting spaces */ 97 while (linep < limit && isspace(*linep)) 98 linep++; 99 100 /* compare with the alias name */ 101 keyp = argp->key.serv.serv.name; 102 while (*keyp && linep < limit && !isspace(*linep) && 103 *keyp == *linep) { 104 keyp++; 105 linep++; 106 } 107 if (*keyp == '\0' && (linep == limit || isspace(*linep))) 108 return (1); 109 110 /* skip remainder of the alias name, if any */ 111 while (linep < limit && !isspace(*linep)) 112 linep++; 113 } 114 return (0); 115 } 116 117 static nss_status_t 118 getbyname(be, a) 119 files_backend_ptr_t be; 120 void *a; 121 { 122 nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a; 123 124 return (_nss_files_XY_all(be, argp, 1, 125 argp->key.serv.serv.name, check_name)); 126 } 127 128 static int 129 check_port(nss_XbyY_args_t *argp, const char *line, int linelen) 130 { 131 const char *limit, *linep, *keyp, *numstart; 132 int numlen, s_port; 133 char numbuf[12], *numend; 134 135 linep = line; 136 limit = line + linelen; 137 138 /* skip name */ 139 while (linep < limit && !isspace(*linep)) 140 linep++; 141 /* skip the delimiting spaces */ 142 while (linep < limit && isspace(*linep)) 143 linep++; 144 145 /* compare port num */ 146 numstart = linep; 147 while (linep < limit && !isspace(*linep) && *linep != '/') 148 linep++; 149 if (linep == limit || *linep != '/') 150 return (0); 151 numlen = linep - numstart; 152 if (numlen == 0 || numlen >= sizeof (numbuf)) 153 return (0); 154 (void) memcpy(numbuf, numstart, numlen); 155 numbuf[numlen] = '\0'; 156 s_port = htons((int)strtol(numbuf, &numend, 10)); 157 if (*numend != '\0') 158 return (0); 159 if (s_port == argp->key.serv.serv.port) { 160 if ((keyp = argp->key.serv.proto) == NULL) 161 return (1); 162 } else 163 return (0); 164 165 /* compare protocol */ 166 linep++; 167 while (*keyp && linep < limit && !isspace(*linep) && *keyp == *linep) { 168 keyp++; 169 linep++; 170 } 171 return (*keyp == '\0' && (linep == limit || isspace(*linep))); 172 } 173 174 static nss_status_t 175 getbyport(be, a) 176 files_backend_ptr_t be; 177 void *a; 178 { 179 nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a; 180 char portstr[12]; 181 182 (void) snprintf(portstr, 12, "%d", ntohs(argp->key.serv.serv.port)); 183 return (_nss_files_XY_all(be, argp, 1, portstr, check_port)); 184 } 185 186 static files_backend_op_t serv_ops[] = { 187 _nss_files_destr, 188 _nss_files_endent, 189 _nss_files_setent, 190 _nss_files_getent_netdb, 191 getbyname, 192 getbyport 193 }; 194 195 /*ARGSUSED*/ 196 nss_backend_t * 197 _nss_files_services_constr(dummy1, dummy2, dummy3) 198 const char *dummy1, *dummy2, *dummy3; 199 { 200 return (_nss_files_constr(serv_ops, 201 sizeof (serv_ops) / sizeof (serv_ops[0]), 202 _PATH_SERVICES, 203 NSS_LINELEN_SERVICES, 204 NULL)); 205 } 206