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 /* 23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include "mdns_common.h" 30 31 /* 32 * gethostby* functions for the ipnodes database. The ipnodes 33 * database stores both IPv4 and IPv6 address information. 34 * mDNS query functions to perform the host lookup are 35 * in mdns/common/mdns_common.c file. 36 * _nss_mdns_ipnodes_constr is called to initialize 37 * the nsswitch backend data structures. 38 */ 39 40 static nss_status_t 41 getbyname(be, a) 42 mdns_backend_ptr_t be; 43 void *a; 44 { 45 nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a; 46 int af = argp->key.ipnode.af_family; 47 char *hname = (char *)argp->key.ipnode.name; 48 struct mdns_querydata qdata; 49 50 (void) memset(&qdata, 0, sizeof (struct mdns_querydata)); 51 qdata.argp = argp; 52 53 _nss_mdns_updatecfg(be); 54 return (_nss_mdns_querybyname(be, hname, af, &qdata)); 55 } 56 57 static nss_status_t 58 getbyaddr(be, a) 59 mdns_backend_ptr_t be; 60 void *a; 61 { 62 int i; 63 char ch; 64 char *chptr; 65 uint8_t *p; 66 struct in6_addr *addr; 67 struct mdns_querydata qdata; 68 char addrqryname[ sizeof ("f.f.f.f.f.f.f.f.f.f.f.f.f.f.f.f") + \ 69 sizeof (".f.f.f.f.f.f.f.f.f.f.f.f.f.f.f.f.ip6.arpa.")]; 70 nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a; 71 72 (void) memset(&qdata, 0, sizeof (struct mdns_querydata)); 73 qdata.argp = argp; 74 argp->h_errno = 0; 75 76 if ((argp->key.hostaddr.type != AF_INET6) || 77 (argp->key.hostaddr.len != sizeof (*addr))) 78 return (NSS_NOTFOUND); 79 80 /* LINTED E_BAD_PTR_CAST_ALIGN */ 81 addr = (struct in6_addr *)(argp->key.hostaddr.addr); 82 83 if (IN6_IS_ADDR_V4MAPPED(addr)) { 84 struct in_addr ipv4addr; 85 86 IN6_V4MAPPED_TO_INADDR(addr, &ipv4addr); 87 if (inet_ntop(AF_INET, (void *) &ipv4addr.s_addr, 88 (void *)qdata.paddrbuf, sizeof (qdata.paddrbuf)) == NULL) 89 return (NSS_NOTFOUND); 90 qdata.af = AF_INET; 91 p = (uint8_t *)&ipv4addr.s_addr; 92 (void) snprintf(addrqryname, sizeof (addrqryname), 93 "%u.%u.%u.%u.in-addr.arpa.", p[3], p[2], p[1], p[0]); 94 } else { 95 if (inet_ntop(AF_INET6, (void *)addr, 96 (void *)qdata.paddrbuf, 97 sizeof (qdata.paddrbuf)) == NULL) 98 return (NSS_NOTFOUND); 99 qdata.af = AF_INET6; 100 chptr = addrqryname; 101 for (i = 0; i < 16; i++) 102 { 103 ch = ((char *)addr)[15-i]; 104 chptr += snprintf(chptr, sizeof (addrqryname)-i*4, 105 "%X.%X.", ch&0x0f, (ch>>4)&0x0f); 106 } 107 (void) strlcpy(chptr, "ip6.arpa.", sizeof (addrqryname)-64); 108 } 109 110 _nss_mdns_updatecfg(be); 111 return (_nss_mdns_querybyaddr(be, addrqryname, qdata.af, &qdata)); 112 } 113 114 /*ARGSUSED*/ 115 static nss_status_t 116 _nss_mdns_getent(be, args) 117 mdns_backend_ptr_t be; 118 void *args; 119 { 120 return (NSS_UNAVAIL); 121 } 122 123 /*ARGSUSED*/ 124 static nss_status_t 125 _nss_mdns_setent(be, dummy) 126 mdns_backend_ptr_t be; 127 void *dummy; 128 { 129 return (NSS_UNAVAIL); 130 } 131 132 /*ARGSUSED*/ 133 static nss_status_t 134 _nss_mdns_endent(be, dummy) 135 mdns_backend_ptr_t be; 136 void *dummy; 137 { 138 return (NSS_UNAVAIL); 139 } 140 141 /*ARGSUSED*/ 142 static nss_status_t 143 _nss_mdns_ipnodes_destr(be, dummy) 144 mdns_backend_ptr_t be; 145 void *dummy; 146 { 147 _nss_mdns_destr(be); 148 return (NSS_SUCCESS); 149 } 150 151 static mdns_backend_op_t ipnodes_ops[] = { 152 _nss_mdns_ipnodes_destr, 153 _nss_mdns_endent, 154 _nss_mdns_setent, 155 _nss_mdns_getent, 156 getbyname, 157 getbyaddr, 158 }; 159 160 /*ARGSUSED*/ 161 nss_backend_t * 162 _nss_mdns_ipnodes_constr(dummy1, dummy2, dummy3) 163 const char *dummy1, *dummy2, *dummy3; 164 { 165 return (_nss_mdns_constr(ipnodes_ops, 166 sizeof (ipnodes_ops) / sizeof (ipnodes_ops[0]))); 167 } 168 169 /*ARGSUSED*/ 170 nss_status_t 171 _nss_get_mdns_ipnodes_name(mdns_backend_ptr_t *be, void **bufp, size_t *sizep) 172 { 173 return (_nss_mdns_gethost_withttl(*bufp, *sizep, 1)); 174 } 175