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 * 4. 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 30 #if defined(LIBC_SCCS) && !defined(lint) 31 static char sccsid[] = "@(#)getproto.c 8.1 (Berkeley) 6/4/93"; 32 #endif /* LIBC_SCCS and not lint */ 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 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 #ifdef NS_CACHING 50 extern int __proto_id_func(char *, size_t *, va_list, void *); 51 extern int __proto_marshal_func(char *, size_t *, void *, va_list, void *); 52 extern int __proto_unmarshal_func(char *, size_t, void *, va_list, void *); 53 #endif 54 55 static int 56 files_getprotobynumber(void *retval, void *mdata, va_list ap) 57 { 58 struct protoent pe; 59 struct protoent_data *ped; 60 int error; 61 62 int number; 63 struct protoent *pptr; 64 char *buffer; 65 size_t buflen; 66 int *errnop; 67 68 number = va_arg(ap, int); 69 pptr = va_arg(ap, struct protoent *); 70 buffer = va_arg(ap, char *); 71 buflen = va_arg(ap, size_t); 72 errnop = va_arg(ap, int *); 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 (pe.p_proto == number) 82 break; 83 if (!ped->stayopen) 84 __endprotoent_p(ped); 85 if (error != 0) { 86 *errnop = -1; 87 return (NS_NOTFOUND); 88 } 89 if (__copy_protoent(&pe, pptr, buffer, buflen) != 0) { 90 *errnop = -1; 91 return (NS_NOTFOUND); 92 } 93 94 *((struct protoent **)retval) = pptr; 95 return (NS_SUCCESS); 96 } 97 98 int 99 getprotobynumber_r(int proto, struct protoent *pptr, char *buffer, 100 size_t buflen, struct protoent **result) 101 { 102 #ifdef NS_CACHING 103 static const nss_cache_info cache_info = 104 NS_COMMON_CACHE_INFO_INITIALIZER( 105 protocols, (void *)nss_lt_id, 106 __proto_id_func, __proto_marshal_func, __proto_unmarshal_func); 107 #endif 108 109 static const ns_dtab dtab[] = { 110 { NSSRC_FILES, files_getprotobynumber, NULL }, 111 #ifdef NS_CACHING 112 NS_CACHE_CB(&cache_info) 113 #endif 114 { NULL, NULL, NULL } 115 }; 116 int rv, ret_errno; 117 118 ret_errno = 0; 119 *result = NULL; 120 rv = nsdispatch(result, dtab, NSDB_PROTOCOLS, "getprotobynumber_r", 121 defaultsrc, proto, pptr, buffer, buflen, &ret_errno); 122 123 if (rv == NS_SUCCESS) 124 return (0); 125 else 126 return (ret_errno); 127 } 128 129 struct protoent * 130 getprotobynumber(int proto) 131 { 132 struct protodata *pd; 133 struct protoent *rval; 134 135 if ((pd = __protodata_init()) == NULL) 136 return (NULL); 137 if (getprotobynumber_r(proto, &pd->proto, pd->data, sizeof(pd->data), 138 &rval) != 0) 139 return (NULL); 140 return (rval); 141 } 142