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. 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[] = "@(#)getprotoname.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 <string.h> 40 #include "netdb_private.h" 41 #ifdef NS_CACHING 42 #include "nscache.h" 43 #endif 44 #include "nss_tls.h" 45 46 static const ns_src defaultsrc[] = { 47 { NSSRC_FILES, NS_SUCCESS }, 48 { NULL, 0 } 49 }; 50 51 #ifdef NS_CACHING 52 extern int __proto_id_func(char *, size_t *, va_list, void *); 53 extern int __proto_marshal_func(char *, size_t *, void *, va_list, void *); 54 extern int __proto_unmarshal_func(char *, size_t, void *, va_list, void *); 55 #endif 56 57 static int 58 files_getprotobyname(void *retval, void *mdata, va_list ap) 59 { 60 struct protoent pe; 61 struct protoent_data *ped; 62 char **cp; 63 int error; 64 65 char *name; 66 struct protoent *pptr; 67 char *buffer; 68 size_t buflen; 69 int *errnop; 70 71 name = va_arg(ap, char *); 72 pptr = va_arg(ap, struct protoent *); 73 buffer = va_arg(ap, char *); 74 buflen = va_arg(ap, size_t); 75 errnop = va_arg(ap, int *); 76 77 78 if ((ped = __protoent_data_init()) == NULL) { 79 *errnop = errno; 80 return (NS_NOTFOUND); 81 } 82 83 __setprotoent_p(ped->stayopen, ped); 84 while ((error = __getprotoent_p(&pe, ped)) == 0) { 85 if (strcmp(pe.p_name, name) == 0) 86 break; 87 for (cp = pe.p_aliases; *cp != 0; cp++) 88 if (strcmp(*cp, name) == 0) 89 goto found; 90 } 91 found: 92 if (!ped->stayopen) 93 __endprotoent_p(ped); 94 if (error != 0) { 95 *errnop = errno; 96 return (NS_NOTFOUND); 97 } 98 if (__copy_protoent(&pe, pptr, buffer, buflen) != 0) { 99 *errnop = errno; 100 return (NS_RETURN); 101 } 102 103 *((struct protoent **)retval) = pptr; 104 return (NS_SUCCESS); 105 } 106 107 108 int 109 getprotobyname_r(const char *name, struct protoent *pptr, char *buffer, 110 size_t buflen, struct protoent **result) 111 { 112 #ifdef NS_CACHING 113 static const nss_cache_info cache_info = 114 NS_COMMON_CACHE_INFO_INITIALIZER( 115 protocols, (void *)nss_lt_name, 116 __proto_id_func, __proto_marshal_func, __proto_unmarshal_func); 117 #endif 118 static const ns_dtab dtab[] = { 119 { NSSRC_FILES, files_getprotobyname, NULL }, 120 #ifdef NS_CACHING 121 NS_CACHE_CB(&cache_info) 122 #endif 123 { NULL, NULL, NULL } 124 }; 125 int rv, ret_errno; 126 127 ret_errno = 0; 128 *result = NULL; 129 rv = nsdispatch(result, dtab, NSDB_PROTOCOLS, "getprotobyname_r", 130 defaultsrc, name, pptr, buffer, buflen, &ret_errno); 131 132 if (rv != NS_SUCCESS) { 133 errno = ret_errno; 134 return (ret_errno); 135 } 136 return (0); 137 } 138 139 struct protoent * 140 getprotobyname(const char *name) 141 { 142 struct protodata *pd; 143 struct protoent *rval; 144 145 if ((pd = __protodata_init()) == NULL) 146 return (NULL); 147 if (getprotobyname_r(name, &pd->proto, pd->data, sizeof(pd->data), 148 &rval) != 0) 149 return (NULL); 150 return (rval); 151 } 152