1 /* $NetBSD: getservbyname_r.c,v 1.9 2012/03/13 21:13:41 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 #if 0 35 static char sccsid[] = "@(#)getservbyname.c 8.1 (Berkeley) 6/4/93"; 36 #else 37 __RCSID("$NetBSD: getservbyname_r.c,v 1.9 2012/03/13 21:13:41 christos Exp $"); 38 #endif 39 #endif /* LIBC_SCCS and not lint */ 40 41 #include <assert.h> 42 #include <netdb.h> 43 #include <stdlib.h> 44 #include <string.h> 45 46 #include "servent.h" 47 48 #ifdef __weak_alias 49 __weak_alias(getservbyname_r,_getservbyname_r) 50 #endif 51 52 static struct servent * 53 _servent_getbyname(struct servent_data *sd, struct servent *sp, 54 const char *name, const char *proto) 55 { 56 57 if ((sd->flags & (_SV_CDB | _SV_PLAINFILE)) == 0) 58 return NULL; 59 60 #if 0 61 if (sd->flags & _SV_CDB) { 62 uint8_t buf[255 * 2 + 2]; 63 size_t namelen, protolen; 64 const uint8_t *data, *data_end; 65 const void *data_ptr; 66 size_t datalen; 67 68 namelen = strlen(name); 69 if (namelen == 0 || namelen > 255) 70 return NULL; 71 if (proto != NULL) { 72 protolen = strlen(proto); 73 if (protolen == 0 || protolen > 255) 74 return NULL; 75 } else 76 protolen = 0; 77 if (namelen + protolen > 255) 78 return NULL; 79 80 buf[0] = (uint8_t)namelen; 81 buf[1] = (uint8_t)protolen; 82 memcpy(buf + 2, name, namelen); 83 memcpy(buf + 2 + namelen, proto, protolen); 84 85 if (cdbr_find(sd->cdb, buf, 2 + namelen + protolen, 86 &data_ptr, &datalen)) 87 return NULL; 88 89 if (datalen < namelen + protolen + 6) 90 return NULL; 91 92 data = data_ptr; 93 data_end = data + datalen; 94 if (protolen) { 95 if (data[2] != protolen) 96 return NULL; 97 if (memcmp(data + 3, proto, protolen + 1)) 98 return NULL; 99 } 100 data += 3 + data[2] + 1; 101 if (data > data_end) 102 return NULL; 103 while (data != data_end) { 104 if (*data == '\0') 105 return NULL; 106 if (data + data[0] + 2 > data_end) 107 return NULL; 108 if (data[0] == namelen && 109 memcmp(data + 1, name, namelen + 1) == 0) 110 return _servent_parsedb(sd, sp, data_ptr, 111 datalen); 112 data += data[0] + 2; 113 } 114 return NULL; 115 } else 116 #endif 117 { 118 while (_servent_getline(sd) != -1) { 119 char **cp; 120 if (_servent_parseline(sd, sp) == NULL) 121 continue; 122 123 if (strcmp(name, sp->s_name) == 0) 124 goto gotname; 125 126 for (cp = sp->s_aliases; *cp; cp++) 127 if (strcmp(name, *cp) == 0) 128 goto gotname; 129 continue; 130 gotname: 131 if (proto == NULL || strcmp(sp->s_proto, proto) == 0) 132 return sp; 133 } 134 return NULL; 135 } 136 } 137 138 struct servent * 139 getservbyname_r(const char *name, const char *proto, struct servent *sp, 140 struct servent_data *sd) 141 { 142 assert(name != NULL); 143 /* proto may be NULL */ 144 145 setservent_r(sd->flags & _SV_STAYOPEN, sd); 146 sp = _servent_getbyname(sd, sp, name, proto); 147 if (!(sd->flags & _SV_STAYOPEN)) 148 _servent_close(sd); 149 return sp; 150 } 151