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