1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)getprotoname.c 8.1 (Berkeley) 6/4/93 30 * $FreeBSD: src/lib/libc/net/getprotoname.c,v 1.7 2007/01/09 00:28:02 imp Exp $ 31 * $DragonFly: src/lib/libc/net/getprotoname.c,v 1.5 2005/11/13 02:04:47 swildner Exp $ 32 */ 33 34 #include <netdb.h> 35 #include <nsswitch.h> 36 #include <string.h> 37 #include "netdb_private.h" 38 #ifdef NS_CACHING 39 #include "nscache.h" 40 #endif 41 #include "nss_tls.h" 42 43 static const ns_src defaultsrc[] = { 44 { NSSRC_FILES, NS_SUCCESS }, 45 { NULL, 0 } 46 }; 47 48 #ifdef NS_CACHING 49 extern int __proto_id_func(char *, size_t *, va_list, void *); 50 extern int __proto_marshal_func(char *, size_t *, void *, va_list, void *); 51 extern int __proto_unmarshal_func(char *, size_t, void *, va_list, void *); 52 #endif 53 54 static int 55 files_getprotobyname(void *retval, void *mdata, va_list ap) 56 { 57 struct protoent pe; 58 struct protoent_data *ped; 59 char **cp; 60 int error; 61 62 char *name; 63 struct protoent *pptr; 64 char *buffer; 65 size_t buflen; 66 int *errnop; 67 68 name = va_arg(ap, char *); 69 pptr = va_arg(ap, struct protoent *); 70 buffer = va_arg(ap, char *); 71 buflen = va_arg(ap, size_t); 72 errnop = va_arg(ap, int *); 73 74 75 if ((ped = __protoent_data_init()) == NULL) { 76 *errnop = -1; 77 return (NS_NOTFOUND); 78 } 79 80 __setprotoent_p(ped->stayopen, ped); 81 while ((error = __getprotoent_p(&pe, ped)) == 0) { 82 if (strcmp(pe.p_name, name) == 0) 83 break; 84 for (cp = pe.p_aliases; *cp != 0; cp++) 85 if (strcmp(*cp, name) == 0) 86 goto found; 87 } 88 found: 89 if (!ped->stayopen) 90 __endprotoent_p(ped); 91 if (error != 0) { 92 *errnop = -1; 93 return (NS_NOTFOUND); 94 } 95 if (__copy_protoent(&pe, pptr, buffer, buflen) != 0) { 96 *errnop = -1; 97 return (NS_NOTFOUND); 98 } 99 100 *((struct protoent **)retval) = pptr; 101 return (NS_SUCCESS); 102 } 103 104 105 int 106 getprotobyname_r(const char *name, struct protoent *pptr, char *buffer, 107 size_t buflen, struct protoent **result) 108 { 109 #ifdef NS_CACHING 110 static const nss_cache_info cache_info = 111 NS_COMMON_CACHE_INFO_INITIALIZER( 112 protocols, (void *)nss_lt_name, 113 __proto_id_func, __proto_marshal_func, __proto_unmarshal_func); 114 #endif 115 static const ns_dtab dtab[] = { 116 { NSSRC_FILES, files_getprotobyname, NULL }, 117 #ifdef NS_CACHING 118 NS_CACHE_CB(&cache_info) 119 #endif 120 { NULL, NULL, NULL } 121 }; 122 int rv, ret_errno; 123 124 ret_errno = 0; 125 *result = NULL; 126 rv = nsdispatch(result, dtab, NSDB_PROTOCOLS, "getprotobyname_r", 127 defaultsrc, name, pptr, buffer, buflen, &ret_errno); 128 129 if (rv == NS_SUCCESS) 130 return (0); 131 else 132 return (ret_errno); 133 } 134 135 struct protoent * 136 getprotobyname(const char *name) 137 { 138 struct protodata *pd; 139 struct protoent *rval; 140 141 if ((pd = __protodata_init()) == NULL) 142 return (NULL); 143 if (getprotobyname_r(name, &pd->proto, pd->data, sizeof(pd->data), 144 &rval) != 0) 145 return (NULL); 146 return (rval); 147 } 148