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 */ 32 33 #include <netdb.h> 34 #include <nsswitch.h> 35 #include <string.h> 36 #include "netdb_private.h" 37 #ifdef NS_CACHING 38 #include "nscache.h" 39 #endif 40 #include "nss_tls.h" 41 42 static const ns_src defaultsrc[] = { 43 { NSSRC_FILES, NS_SUCCESS }, 44 { NULL, 0 } 45 }; 46 47 #ifdef NS_CACHING 48 extern int __proto_id_func(char *, size_t *, va_list, void *); 49 extern int __proto_marshal_func(char *, size_t *, void *, va_list, void *); 50 extern int __proto_unmarshal_func(char *, size_t, void *, va_list, void *); 51 #endif 52 53 static int 54 files_getprotobyname(void *retval, void *mdata __unused, va_list ap) 55 { 56 struct protoent pe; 57 struct protoent_data *ped; 58 char **cp; 59 int error; 60 61 char *name; 62 struct protoent *pptr; 63 char *buffer; 64 size_t buflen; 65 int *errnop; 66 67 name = va_arg(ap, char *); 68 pptr = va_arg(ap, struct protoent *); 69 buffer = va_arg(ap, char *); 70 buflen = va_arg(ap, size_t); 71 errnop = va_arg(ap, int *); 72 73 74 if ((ped = __protoent_data_init()) == NULL) { 75 *errnop = -1; 76 return (NS_NOTFOUND); 77 } 78 79 __setprotoent_p(ped->stayopen, ped); 80 while ((error = __getprotoent_p(&pe, ped)) == 0) { 81 if (strcmp(pe.p_name, name) == 0) 82 break; 83 for (cp = pe.p_aliases; *cp != NULL; cp++) 84 if (strcmp(*cp, name) == 0) 85 goto found; 86 } 87 found: 88 if (!ped->stayopen) 89 __endprotoent_p(ped); 90 if (error != 0) { 91 *errnop = -1; 92 return (NS_NOTFOUND); 93 } 94 if (__copy_protoent(&pe, pptr, buffer, buflen) != 0) { 95 *errnop = -1; 96 return (NS_NOTFOUND); 97 } 98 99 *((struct protoent **)retval) = pptr; 100 return (NS_SUCCESS); 101 } 102 103 104 int 105 getprotobyname_r(const char *name, struct protoent *pptr, char *buffer, 106 size_t buflen, struct protoent **result) 107 { 108 #ifdef NS_CACHING 109 static const nss_cache_info cache_info = 110 NS_COMMON_CACHE_INFO_INITIALIZER( 111 protocols, (void *)nss_lt_name, 112 __proto_id_func, __proto_marshal_func, __proto_unmarshal_func); 113 #endif 114 static const ns_dtab dtab[] = { 115 { NSSRC_FILES, files_getprotobyname, NULL }, 116 #ifdef NS_CACHING 117 NS_CACHE_CB(&cache_info) 118 #endif 119 { NULL, NULL, NULL } 120 }; 121 int rv, ret_errno; 122 123 ret_errno = 0; 124 *result = NULL; 125 rv = nsdispatch(result, dtab, NSDB_PROTOCOLS, "getprotobyname_r", 126 defaultsrc, name, pptr, buffer, buflen, &ret_errno); 127 128 if (rv == NS_SUCCESS) 129 return (0); 130 else 131 return (ret_errno); 132 } 133 134 struct protoent * 135 getprotobyname(const char *name) 136 { 137 struct protodata *pd; 138 struct protoent *rval; 139 140 if ((pd = __protodata_init()) == NULL) 141 return (NULL); 142 if (getprotobyname_r(name, &pd->proto, pd->data, sizeof(pd->data), 143 &rval) != 0) 144 return (NULL); 145 return (rval); 146 } 147