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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #if defined(LIBC_SCCS) && !defined(lint) 35 static char sccsid[] = "@(#)getproto.c 8.1 (Berkeley) 6/4/93"; 36 #endif /* LIBC_SCCS and not lint */ 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <netdb.h> 41 #include <nsswitch.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_getprotobynumber(void *retval, void *mdata, va_list ap) 61 { 62 struct protoent pe; 63 struct protoent_data *ped; 64 int error; 65 66 int number; 67 struct protoent *pptr; 68 char *buffer; 69 size_t buflen; 70 int *errnop; 71 72 number = va_arg(ap, int); 73 pptr = va_arg(ap, struct protoent *); 74 buffer = va_arg(ap, char *); 75 buflen = va_arg(ap, size_t); 76 errnop = va_arg(ap, int *); 77 78 if ((ped = __protoent_data_init()) == NULL) { 79 *errnop = -1; 80 return (NS_NOTFOUND); 81 } 82 83 __setprotoent_p(ped->stayopen, ped); 84 while ((error = __getprotoent_p(&pe, ped)) == 0) 85 if (pe.p_proto == number) 86 break; 87 if (!ped->stayopen) 88 __endprotoent_p(ped); 89 if (error != 0) { 90 *errnop = -1; 91 return (NS_NOTFOUND); 92 } 93 if (__copy_protoent(&pe, pptr, buffer, buflen) != 0) { 94 *errnop = -1; 95 return (NS_NOTFOUND); 96 } 97 98 *((struct protoent **)retval) = pptr; 99 return (NS_SUCCESS); 100 } 101 102 int 103 getprotobynumber_r(int proto, struct protoent *pptr, char *buffer, 104 size_t buflen, struct protoent **result) 105 { 106 #ifdef NS_CACHING 107 static const nss_cache_info cache_info = 108 NS_COMMON_CACHE_INFO_INITIALIZER( 109 protocols, (void *)nss_lt_id, 110 __proto_id_func, __proto_marshal_func, __proto_unmarshal_func); 111 #endif 112 113 static const ns_dtab dtab[] = { 114 { NSSRC_FILES, files_getprotobynumber, NULL }, 115 #ifdef NS_CACHING 116 NS_CACHE_CB(&cache_info) 117 #endif 118 { NULL, NULL, NULL } 119 }; 120 int rv, ret_errno; 121 122 ret_errno = 0; 123 *result = NULL; 124 rv = nsdispatch(result, dtab, NSDB_PROTOCOLS, "getprotobynumber_r", 125 defaultsrc, proto, pptr, buffer, buflen, &ret_errno); 126 127 if (rv == NS_SUCCESS) 128 return (0); 129 else 130 return (ret_errno); 131 } 132 133 struct protoent * 134 getprotobynumber(int proto) 135 { 136 struct protodata *pd; 137 struct protoent *rval; 138 139 if ((pd = __protodata_init()) == NULL) 140 return (NULL); 141 if (getprotobynumber_r(proto, &pd->proto, pd->data, sizeof(pd->data), 142 &rval) != 0) 143 return (NULL); 144 return (rval); 145 } 146