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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 * 25 * files/netmasks.c -- "files" backend for nsswitch "netmasks" database 26 */ 27 28 /* 29 * All routines necessary to deal with the file /etc/inet/netmasks. The file 30 * contains mappings from 32 bit network internet addresses to their 31 * corresponding 32 bit mask internet addresses. The addresses are in dotted 32 * internet address form. 33 */ 34 35 #include "files_common.h" 36 #include <string.h> 37 #include <sys/types.h> 38 #include <sys/socket.h> 39 #include <net/if.h> 40 #include <netinet/in.h> 41 #include <arpa/inet.h> 42 #include <nss_dbdefs.h> 43 #include <ctype.h> 44 45 /* 46 * Validate 'files' netmasks entry. The comparison objects are in IPv4 47 * internet address format. 48 */ 49 static int 50 check_addr(nss_XbyY_args_t *argp, const char *line, int linelen) 51 { 52 const char *limit, *linep, *addrstart; 53 int addrlen; 54 char addrbuf[NSS_LINELEN_NETMASKS]; 55 struct in_addr lineaddr, argsaddr; 56 57 linep = line; 58 limit = line + linelen; 59 60 /* skip leading spaces */ 61 while (linep < limit && isspace(*linep)) 62 linep++; 63 64 addrstart = linep; 65 while (linep < limit && !isspace(*linep)) 66 linep++; 67 if (linep == limit) 68 return (0); 69 addrlen = linep - addrstart; 70 if (addrlen < sizeof (addrbuf)) { 71 (void) memcpy(addrbuf, addrstart, addrlen); 72 addrbuf[addrlen] = '\0'; 73 if ((lineaddr.s_addr = inet_addr(addrbuf)) == 74 (in_addr_t)0xffffffffU) 75 return (0); 76 if ((argsaddr.s_addr = inet_addr(argp->key.name)) 77 == (in_addr_t)0xffffffffU) 78 return (0); 79 return (lineaddr.s_addr == argsaddr.s_addr); 80 } 81 return (0); 82 } 83 84 static nss_status_t 85 getbynet(be, a) 86 files_backend_ptr_t be; 87 void *a; 88 { 89 nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a; 90 nss_status_t res; 91 char tmpbuf[NSS_LINELEN_NETMASKS]; 92 93 /* 94 * use the buffer passed in if result is to be returned 95 * in /etc file format 96 */ 97 if (argp->buf.result != NULL) { 98 argp->buf.buffer = tmpbuf; 99 argp->buf.buflen = NSS_LINELEN_NETMASKS; 100 } 101 res = _nss_files_XY_all(be, argp, 1, argp->key.name, check_addr); 102 if (argp->buf.result != NULL) { 103 argp->buf.buffer = NULL; 104 argp->buf.buflen = 0; 105 } else { 106 /* the frontend expects the netmask data only */ 107 if (res == NSS_SUCCESS) { 108 char *m; 109 char *s = (char *)argp->returnval; 110 int l = 0; 111 112 m = s + argp->returnlen - 1; 113 114 /* skip trailing spaces */ 115 while (s < m && isspace(*m)) 116 m--; 117 118 for (; s <= m; m--) { 119 if (isspace(*m)) 120 break; 121 l++; 122 } 123 m++; 124 (void) memmove(argp->returnval, m, l); 125 argp->returnlen = l; 126 *(s + l) = '\0'; 127 } 128 } 129 130 return (res); 131 } 132 133 static files_backend_op_t netmasks_ops[] = { 134 _nss_files_destr, 135 getbynet 136 }; 137 138 /*ARGSUSED*/ 139 nss_backend_t * 140 _nss_files_netmasks_constr(dummy1, dummy2, dummy3) 141 const char *dummy1, *dummy2, *dummy3; 142 { 143 return (_nss_files_constr(netmasks_ops, 144 sizeof (netmasks_ops) / sizeof (netmasks_ops[0]), 145 _PATH_NETMASKS, NSS_LINELEN_NETMASKS, NULL)); 146 } 147