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