1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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 #if defined(LIBC_SCCS) && !defined(lint) 33 static char sccsid[] = "@(#)getprotoname.c 8.1 (Berkeley) 6/4/93"; 34 #endif /* LIBC_SCCS and not lint */ 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <errno.h> 39 #include <netdb.h> 40 #include <nsswitch.h> 41 #include <string.h> 42 #include "netdb_private.h" 43 #ifdef NS_CACHING 44 #include "nscache.h" 45 #endif 46 #include "nss_tls.h" 47 48 static const ns_src defaultsrc[] = { 49 { NSSRC_FILES, NS_SUCCESS }, 50 { NULL, 0 } 51 }; 52 53 #ifdef NS_CACHING 54 extern int __proto_id_func(char *, size_t *, va_list, void *); 55 extern int __proto_marshal_func(char *, size_t *, void *, va_list, void *); 56 extern int __proto_unmarshal_func(char *, size_t, void *, va_list, void *); 57 #endif 58 59 static int 60 files_getprotobyname(void *retval, void *mdata, va_list ap) 61 { 62 struct protoent pe; 63 struct protoent_data *ped; 64 char **cp; 65 int error; 66 67 char *name; 68 struct protoent *pptr; 69 char *buffer; 70 size_t buflen; 71 int *errnop; 72 73 name = va_arg(ap, char *); 74 pptr = va_arg(ap, struct protoent *); 75 buffer = va_arg(ap, char *); 76 buflen = va_arg(ap, size_t); 77 errnop = va_arg(ap, int *); 78 79 80 if ((ped = __protoent_data_init()) == NULL) { 81 *errnop = errno; 82 return (NS_NOTFOUND); 83 } 84 85 __setprotoent_p(ped->stayopen, ped); 86 while ((error = __getprotoent_p(&pe, ped)) == 0) { 87 if (strcmp(pe.p_name, name) == 0) 88 break; 89 for (cp = pe.p_aliases; *cp != 0; cp++) 90 if (strcmp(*cp, name) == 0) 91 goto found; 92 } 93 found: 94 if (!ped->stayopen) 95 __endprotoent_p(ped); 96 if (error != 0) { 97 *errnop = errno; 98 return (NS_NOTFOUND); 99 } 100 if (__copy_protoent(&pe, pptr, buffer, buflen) != 0) { 101 *errnop = errno; 102 return (NS_RETURN); 103 } 104 105 *((struct protoent **)retval) = pptr; 106 return (NS_SUCCESS); 107 } 108 109 110 int 111 getprotobyname_r(const char *name, struct protoent *pptr, char *buffer, 112 size_t buflen, struct protoent **result) 113 { 114 #ifdef NS_CACHING 115 static const nss_cache_info cache_info = 116 NS_COMMON_CACHE_INFO_INITIALIZER( 117 protocols, (void *)nss_lt_name, 118 __proto_id_func, __proto_marshal_func, __proto_unmarshal_func); 119 #endif 120 static const ns_dtab dtab[] = { 121 { NSSRC_FILES, files_getprotobyname, NULL }, 122 #ifdef NS_CACHING 123 NS_CACHE_CB(&cache_info) 124 #endif 125 { NULL, NULL, NULL } 126 }; 127 int rv, ret_errno; 128 129 ret_errno = 0; 130 *result = NULL; 131 rv = nsdispatch(result, dtab, NSDB_PROTOCOLS, "getprotobyname_r", 132 defaultsrc, name, pptr, buffer, buflen, &ret_errno); 133 134 if (rv != NS_SUCCESS) { 135 errno = ret_errno; 136 return (ret_errno); 137 } 138 return (0); 139 } 140 141 struct protoent * 142 getprotobyname(const char *name) 143 { 144 struct protodata *pd; 145 struct protoent *rval; 146 147 if ((pd = __protodata_init()) == NULL) 148 return (NULL); 149 if (getprotobyname_r(name, &pd->proto, pd->data, sizeof(pd->data), 150 &rval) != 0) 151 return (NULL); 152 return (rval); 153 } 154