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