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[] = "@(#)getproto.c 8.1 (Berkeley) 6/4/93"; 34 #endif /* LIBC_SCCS and not lint */ 35 #include <errno.h> 36 #include <netdb.h> 37 #include <nsswitch.h> 38 #include "netdb_private.h" 39 #ifdef NS_CACHING 40 #include "nscache.h" 41 #endif 42 #include "nss_tls.h" 43 44 static const ns_src defaultsrc[] = { 45 { NSSRC_FILES, NS_SUCCESS }, 46 { NULL, 0 } 47 }; 48 49 static int 50 files_getprotobynumber(void *retval, void *mdata, va_list ap) 51 { 52 struct protoent pe; 53 struct protoent_data *ped; 54 int error; 55 56 int number; 57 struct protoent *pptr; 58 char *buffer; 59 size_t buflen; 60 int *errnop; 61 62 number = va_arg(ap, int); 63 pptr = va_arg(ap, struct protoent *); 64 buffer = va_arg(ap, char *); 65 buflen = va_arg(ap, size_t); 66 errnop = va_arg(ap, int *); 67 68 if ((ped = __protoent_data_init()) == NULL) { 69 *errnop = errno; 70 return (NS_NOTFOUND); 71 } 72 73 __setprotoent_p(ped->stayopen, ped); 74 while ((error = __getprotoent_p(&pe, ped)) == 0) 75 if (pe.p_proto == number) 76 break; 77 if (!ped->stayopen) 78 __endprotoent_p(ped); 79 if (error != 0) { 80 *errnop = errno; 81 return (NS_NOTFOUND); 82 } 83 if (__copy_protoent(&pe, pptr, buffer, buflen) != 0) { 84 *errnop = errno; 85 return (NS_RETURN); 86 } 87 88 *((struct protoent **)retval) = pptr; 89 return (NS_SUCCESS); 90 } 91 92 int 93 getprotobynumber_r(int proto, struct protoent *pptr, char *buffer, 94 size_t buflen, struct protoent **result) 95 { 96 #ifdef NS_CACHING 97 static const nss_cache_info cache_info = 98 NS_COMMON_CACHE_INFO_INITIALIZER( 99 protocols, (void *)nss_lt_id, 100 __proto_id_func, __proto_marshal_func, __proto_unmarshal_func); 101 #endif 102 103 static const ns_dtab dtab[] = { 104 { NSSRC_FILES, files_getprotobynumber, NULL }, 105 #ifdef NS_CACHING 106 NS_CACHE_CB(&cache_info) 107 #endif 108 { NULL, NULL, NULL } 109 }; 110 int rv, ret_errno; 111 112 ret_errno = 0; 113 *result = NULL; 114 rv = nsdispatch(result, dtab, NSDB_PROTOCOLS, "getprotobynumber_r", 115 defaultsrc, proto, pptr, buffer, buflen, &ret_errno); 116 117 if (rv != NS_SUCCESS) { 118 errno = ret_errno; 119 return (ret_errno); 120 } 121 return (0); 122 } 123 124 struct protoent * 125 getprotobynumber(int proto) 126 { 127 struct protodata *pd; 128 struct protoent *rval; 129 130 if ((pd = __protodata_init()) == NULL) 131 return (NULL); 132 if (getprotobynumber_r(proto, &pd->proto, pd->data, sizeof(pd->data), 133 &rval) != 0) 134 return (NULL); 135 return (rval); 136 } 137