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 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #include <ctype.h> 29 #include <netdb.h> 30 #include <stdlib.h> 31 #include <string.h> 32 #include <nss_dbdefs.h> 33 34 int str2protoent(const char *, int, void *, 35 char *, int); 36 37 static int proto_stayopen; 38 /* 39 * Unsynchronized, but it affects only 40 * efficiency, not correctness 41 */ 42 43 static DEFINE_NSS_DB_ROOT(db_root); 44 static DEFINE_NSS_GETENT(context); 45 46 void 47 _nss_initf_proto(nss_db_params_t *p) 48 { 49 p->name = NSS_DBNAM_PROTOCOLS; 50 p->default_config = NSS_DEFCONF_PROTOCOLS; 51 } 52 53 struct protoent * 54 getprotobyname_r(const char *name, struct protoent *result, 55 char *buffer, int buflen) 56 { 57 nss_XbyY_args_t arg; 58 nss_status_t res; 59 60 if (name == (const char *)NULL) { 61 errno = ERANGE; 62 return (NULL); 63 } 64 NSS_XbyY_INIT(&arg, result, buffer, buflen, str2protoent); 65 arg.key.name = name; 66 arg.stayopen = proto_stayopen; 67 res = nss_search(&db_root, _nss_initf_proto, 68 NSS_DBOP_PROTOCOLS_BYNAME, &arg); 69 arg.status = res; 70 (void) NSS_XbyY_FINI(&arg); 71 return ((struct protoent *)arg.returnval); 72 } 73 74 struct protoent * 75 getprotobynumber_r(int proto, struct protoent *result, char *buffer, int buflen) 76 { 77 nss_XbyY_args_t arg; 78 nss_status_t res; 79 80 NSS_XbyY_INIT(&arg, result, buffer, buflen, str2protoent); 81 arg.key.number = proto; 82 arg.stayopen = proto_stayopen; 83 res = nss_search(&db_root, _nss_initf_proto, 84 NSS_DBOP_PROTOCOLS_BYNUMBER, &arg); 85 arg.status = res; 86 (void) NSS_XbyY_FINI(&arg); 87 return ((struct protoent *)arg.returnval); 88 } 89 90 int 91 setprotoent(int stay) 92 { 93 proto_stayopen = stay; 94 nss_setent(&db_root, _nss_initf_proto, &context); 95 return (0); 96 } 97 98 int 99 endprotoent() 100 { 101 proto_stayopen = 0; 102 nss_endent(&db_root, _nss_initf_proto, &context); 103 nss_delete(&db_root); 104 return (0); 105 } 106 107 struct protoent * 108 getprotoent_r(struct protoent *result, char *buffer, int buflen) 109 { 110 nss_XbyY_args_t arg; 111 nss_status_t res; 112 113 NSS_XbyY_INIT(&arg, result, buffer, buflen, str2protoent); 114 /* No stayopen flag; of course you stay open for iteration */ 115 res = nss_getent(&db_root, _nss_initf_proto, &context, &arg); 116 arg.status = res; 117 (void) NSS_XbyY_FINI(&arg); 118 return ((struct protoent *)arg.returnval); 119 } 120 121 /* 122 * Return values: 0 = success, 1 = parse error, 2 = erange ... 123 * The structure pointer passed in is a structure in the caller's space 124 * wherein the field pointers would be set to areas in the buffer if 125 * need be. instring and buffer should be separate areas. Let's not 126 * fight over crumbs. 127 */ 128 int 129 str2protoent(const char *instr, int lenstr, 130 void *ent /* it is really (struct protoent *) */, 131 char *buffer, int buflen) 132 { 133 struct protoent *proto = (struct protoent *)ent; 134 const char *p, *numstart, *namestart, *limit; 135 int numlen, namelen = 0; 136 char numbuf[16]; 137 char *numend; 138 139 if ((instr >= buffer && (buffer + buflen) > instr) || 140 (buffer >= instr && (instr + lenstr) > buffer)) { 141 return (NSS_STR_PARSE_PARSE); 142 } 143 144 p = instr; 145 limit = p + lenstr; 146 147 while (p < limit && isspace(*p)) { 148 p++; 149 } 150 namestart = p; 151 while (p < limit && !isspace(*p)) { 152 p++; /* Skip over the canonical name */ 153 } 154 namelen = (int)(p - namestart); 155 156 if (buflen <= namelen) { /* not enough buffer */ 157 return (NSS_STR_PARSE_ERANGE); 158 } 159 (void) memcpy(buffer, namestart, namelen); 160 buffer[namelen] = '\0'; 161 proto->p_name = buffer; 162 163 while (p < limit && isspace(*p)) { 164 p++; 165 } 166 if (p >= limit) { 167 /* Syntax error -- no proto number */ 168 return (NSS_STR_PARSE_PARSE); 169 } 170 numstart = p; 171 do { 172 p++; /* Find the end of the proto number */ 173 } while (p < limit && !isspace(*p)); 174 numlen = (int)(p - numstart); 175 if (numlen >= (int)sizeof (numbuf)) { 176 /* Syntax error -- supposed number is too long */ 177 return (NSS_STR_PARSE_PARSE); 178 } 179 (void) memcpy(numbuf, numstart, (size_t)numlen); 180 numbuf[numlen] = '\0'; 181 proto->p_proto = (int)strtol(numbuf, &numend, 10); 182 if (*numend != '\0') { 183 /* Syntax error -- protocol number isn't a number */ 184 return (NSS_STR_PARSE_PARSE); 185 } 186 187 while (p < limit && isspace(*p)) { 188 p++; 189 } 190 /* 191 * Although nss_files_XY_all calls us with # stripped, 192 * we should be able to deal with it here in order to 193 * be more useful. 194 */ 195 if (p >= limit || *p == '#') { /* no aliases, no problem */ 196 char **ptr; 197 198 ptr = (char **)ROUND_UP(buffer + namelen + 1, 199 sizeof (char *)); 200 if ((char *)ptr >= buffer + buflen) { 201 /* hope they don't try to peek in */ 202 proto->p_aliases = 0; 203 return (NSS_STR_PARSE_ERANGE); 204 } else { 205 *ptr = 0; 206 proto->p_aliases = ptr; 207 return (NSS_STR_PARSE_SUCCESS); 208 } 209 } 210 proto->p_aliases = _nss_netdb_aliases(p, lenstr - (int)(p - instr), 211 buffer + namelen + 1, buflen - namelen - 1); 212 return (NSS_STR_PARSE_SUCCESS); 213 } 214