1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * files/ether_addr.c -- "files" backend for nsswitch "ethers" database 24 * 25 * Copyright 1988-1995,2002 Sun Microsystems, Inc. All rights reserved. 26 * Use is subject to license terms. 27 */ 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 /* 32 * All routines necessary to deal with the file /etc/ethers. The file 33 * contains mappings from 48 bit ethernet addresses to their corresponding 34 * hosts names. The addresses have an ascii representation of the form 35 * "x:x:x:x:x:x" where x is a hex number between 0x00 and 0xff; the 36 * bytes are always in network order. 37 */ 38 39 #include <sys/types.h> 40 #include <sys/socket.h> 41 #include <net/if.h> 42 #include <netinet/in.h> 43 #include <netinet/if_ether.h> 44 #include <nss_dbdefs.h> 45 #include "files_common.h" 46 #include <strings.h> 47 48 #define _PATH_ETHERS "/etc/ethers" 49 50 static int 51 check_host(args) 52 nss_XbyY_args_t *args; 53 { 54 return (strcmp(args->buf.buffer, args->key.name) == 0); 55 } 56 57 static nss_status_t 58 getbyhost(be, a) 59 files_backend_ptr_t be; 60 void *a; 61 { 62 nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a; 63 char hostname[MAXHOSTNAMELEN]; 64 nss_status_t res; 65 66 argp->buf.buffer = hostname; 67 argp->buf.buflen = MAXHOSTNAMELEN; 68 69 res = _nss_files_XY_all(be, argp, 0, argp->key.name, check_host); 70 71 argp->buf.buffer = NULL; 72 argp->buf.buflen = 0; 73 return (res); 74 } 75 76 static int 77 check_ether(args) 78 nss_XbyY_args_t *args; 79 { 80 return (ether_cmp(args->buf.result, args->key.ether) == 0); 81 } 82 83 static nss_status_t 84 getbyether(be, a) 85 files_backend_ptr_t be; 86 void *a; 87 { 88 nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a; 89 struct ether_addr etheraddr; 90 nss_status_t res; 91 92 argp->buf.result = ðeraddr; 93 94 res = _nss_files_XY_all(be, argp, 0, NULL, check_ether); 95 96 argp->buf.result = NULL; 97 return (res); 98 } 99 100 static files_backend_op_t ethers_ops[] = { 101 _nss_files_destr, 102 getbyhost, 103 getbyether 104 }; 105 106 /*ARGSUSED*/ 107 nss_backend_t * 108 _nss_files_ethers_constr(dummy1, dummy2, dummy3) 109 const char *dummy1, *dummy2, *dummy3; 110 { 111 return (_nss_files_constr(ethers_ops, 112 sizeof (ethers_ops) / sizeof (ethers_ops[0]), 113 _PATH_ETHERS, 114 NSS_LINELEN_ETHERS, 115 NULL)); 116 } 117