1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * dns_common.c 24*0Sstevel@tonic-gate * 25*0Sstevel@tonic-gate * Copyright (c) 1993,1998 by Sun Microsystems, Inc. 26*0Sstevel@tonic-gate * All rights reserved. 27*0Sstevel@tonic-gate */ 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate #include "dns_common.h" 32*0Sstevel@tonic-gate 33*0Sstevel@tonic-gate #define DNS_ALIASES 0 34*0Sstevel@tonic-gate #define DNS_ADDRLIST 1 35*0Sstevel@tonic-gate #define DNS_MAPDLIST 2 36*0Sstevel@tonic-gate 37*0Sstevel@tonic-gate static int 38*0Sstevel@tonic-gate dns_netdb_aliases(from_list, to_list, aliaspp, type, count, af_type) 39*0Sstevel@tonic-gate char **from_list, **to_list, **aliaspp; 40*0Sstevel@tonic-gate int type, *count, af_type; 41*0Sstevel@tonic-gate { 42*0Sstevel@tonic-gate char *fstr; 43*0Sstevel@tonic-gate int cnt = 0; 44*0Sstevel@tonic-gate size_t len; 45*0Sstevel@tonic-gate 46*0Sstevel@tonic-gate *count = 0; 47*0Sstevel@tonic-gate if ((char *)to_list >= *aliaspp) 48*0Sstevel@tonic-gate return (NSS_STR_PARSE_ERANGE); 49*0Sstevel@tonic-gate 50*0Sstevel@tonic-gate for (fstr = from_list[cnt]; fstr != NULL; fstr = from_list[cnt]) { 51*0Sstevel@tonic-gate if (type == DNS_ALIASES) 52*0Sstevel@tonic-gate len = strlen(fstr) + 1; 53*0Sstevel@tonic-gate else 54*0Sstevel@tonic-gate len = (af_type == AF_INET) ? sizeof (struct in_addr) 55*0Sstevel@tonic-gate : sizeof (struct in6_addr); 56*0Sstevel@tonic-gate *aliaspp -= len; 57*0Sstevel@tonic-gate to_list[cnt] = *aliaspp; 58*0Sstevel@tonic-gate if (*aliaspp <= (char *)&to_list[cnt+1]) 59*0Sstevel@tonic-gate return (NSS_STR_PARSE_ERANGE); 60*0Sstevel@tonic-gate if (type == DNS_MAPDLIST) { 61*0Sstevel@tonic-gate struct in6_addr *addr6p = (struct in6_addr *) *aliaspp; 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate (void) memset(addr6p, '\0', sizeof (struct in6_addr)); 64*0Sstevel@tonic-gate (void) memcpy(&addr6p->s6_addr[12], fstr, 65*0Sstevel@tonic-gate sizeof (struct in_addr)); 66*0Sstevel@tonic-gate addr6p->s6_addr[10] = 0xffU; 67*0Sstevel@tonic-gate addr6p->s6_addr[11] = 0xffU; 68*0Sstevel@tonic-gate ++cnt; 69*0Sstevel@tonic-gate } else { 70*0Sstevel@tonic-gate (void) memcpy (*aliaspp, fstr, len); 71*0Sstevel@tonic-gate ++cnt; 72*0Sstevel@tonic-gate } 73*0Sstevel@tonic-gate } 74*0Sstevel@tonic-gate to_list[cnt] = NULL; 75*0Sstevel@tonic-gate 76*0Sstevel@tonic-gate *count = cnt; 77*0Sstevel@tonic-gate if (cnt == 0) 78*0Sstevel@tonic-gate return (NSS_STR_PARSE_PARSE); 79*0Sstevel@tonic-gate 80*0Sstevel@tonic-gate return (NSS_STR_PARSE_SUCCESS); 81*0Sstevel@tonic-gate } 82*0Sstevel@tonic-gate 83*0Sstevel@tonic-gate 84*0Sstevel@tonic-gate int 85*0Sstevel@tonic-gate ent2result(he, argp, af_type) 86*0Sstevel@tonic-gate struct hostent *he; 87*0Sstevel@tonic-gate nss_XbyY_args_t *argp; 88*0Sstevel@tonic-gate int af_type; 89*0Sstevel@tonic-gate { 90*0Sstevel@tonic-gate char *buffer, *limit; 91*0Sstevel@tonic-gate int buflen = argp->buf.buflen; 92*0Sstevel@tonic-gate int ret, count; 93*0Sstevel@tonic-gate size_t len; 94*0Sstevel@tonic-gate struct hostent *host; 95*0Sstevel@tonic-gate struct in_addr *addrp; 96*0Sstevel@tonic-gate struct in6_addr *addrp6; 97*0Sstevel@tonic-gate 98*0Sstevel@tonic-gate limit = argp->buf.buffer + buflen; 99*0Sstevel@tonic-gate host = (struct hostent *) argp->buf.result; 100*0Sstevel@tonic-gate buffer = argp->buf.buffer; 101*0Sstevel@tonic-gate 102*0Sstevel@tonic-gate /* h_addrtype and h_length */ 103*0Sstevel@tonic-gate host->h_addrtype = af_type; 104*0Sstevel@tonic-gate host->h_length = (af_type == AF_INET) ? sizeof (struct in_addr) 105*0Sstevel@tonic-gate : sizeof (struct in6_addr); 106*0Sstevel@tonic-gate 107*0Sstevel@tonic-gate /* h_name */ 108*0Sstevel@tonic-gate len = strlen(he->h_name) + 1; 109*0Sstevel@tonic-gate host->h_name = buffer; 110*0Sstevel@tonic-gate if (host->h_name + len >= limit) 111*0Sstevel@tonic-gate return (NSS_STR_PARSE_ERANGE); 112*0Sstevel@tonic-gate (void) memcpy(host->h_name, he->h_name, len); 113*0Sstevel@tonic-gate buffer += len; 114*0Sstevel@tonic-gate 115*0Sstevel@tonic-gate /* h_addr_list */ 116*0Sstevel@tonic-gate if (af_type == AF_INET) { 117*0Sstevel@tonic-gate addrp = (struct in_addr *) ROUND_DOWN(limit, sizeof (*addrp)); 118*0Sstevel@tonic-gate host->h_addr_list = (char **) 119*0Sstevel@tonic-gate ROUND_UP(buffer, sizeof (char **)); 120*0Sstevel@tonic-gate ret = dns_netdb_aliases(he->h_addr_list, host->h_addr_list, 121*0Sstevel@tonic-gate (char **)&addrp, DNS_ADDRLIST, &count, af_type); 122*0Sstevel@tonic-gate if (ret != NSS_STR_PARSE_SUCCESS) 123*0Sstevel@tonic-gate return (ret); 124*0Sstevel@tonic-gate /* h_aliases */ 125*0Sstevel@tonic-gate host->h_aliases = host->h_addr_list + count + 1; 126*0Sstevel@tonic-gate ret = dns_netdb_aliases(he->h_aliases, host->h_aliases, 127*0Sstevel@tonic-gate (char **)&addrp, DNS_ALIASES, &count, af_type); 128*0Sstevel@tonic-gate } else { 129*0Sstevel@tonic-gate addrp6 = (struct in6_addr *) 130*0Sstevel@tonic-gate ROUND_DOWN(limit, sizeof (*addrp6)); 131*0Sstevel@tonic-gate host->h_addr_list = (char **) 132*0Sstevel@tonic-gate ROUND_UP(buffer, sizeof (char **)); 133*0Sstevel@tonic-gate if (he->h_addrtype == AF_INET && af_type == AF_INET6) { 134*0Sstevel@tonic-gate ret = dns_netdb_aliases(he->h_addr_list, 135*0Sstevel@tonic-gate host->h_addr_list, (char **)&addrp6, 136*0Sstevel@tonic-gate DNS_MAPDLIST, &count, af_type); 137*0Sstevel@tonic-gate } else { 138*0Sstevel@tonic-gate ret = dns_netdb_aliases(he->h_addr_list, 139*0Sstevel@tonic-gate host->h_addr_list, (char **)&addrp6, 140*0Sstevel@tonic-gate DNS_ADDRLIST, &count, af_type); 141*0Sstevel@tonic-gate } 142*0Sstevel@tonic-gate if (ret != NSS_STR_PARSE_SUCCESS) 143*0Sstevel@tonic-gate return (ret); 144*0Sstevel@tonic-gate /* h_aliases */ 145*0Sstevel@tonic-gate host->h_aliases = host->h_addr_list + count + 1; 146*0Sstevel@tonic-gate ret = dns_netdb_aliases(he->h_aliases, host->h_aliases, 147*0Sstevel@tonic-gate (char **)&addrp6, DNS_ALIASES, &count, af_type); 148*0Sstevel@tonic-gate } 149*0Sstevel@tonic-gate if (ret == NSS_STR_PARSE_PARSE) 150*0Sstevel@tonic-gate ret = NSS_STR_PARSE_SUCCESS; 151*0Sstevel@tonic-gate 152*0Sstevel@tonic-gate return (ret); 153*0Sstevel@tonic-gate } 154*0Sstevel@tonic-gate 155*0Sstevel@tonic-gate 156*0Sstevel@tonic-gate nss_backend_t * 157*0Sstevel@tonic-gate _nss_dns_constr(dns_backend_op_t ops[], int n_ops) 158*0Sstevel@tonic-gate { 159*0Sstevel@tonic-gate dns_backend_ptr_t be; 160*0Sstevel@tonic-gate 161*0Sstevel@tonic-gate if ((be = (dns_backend_ptr_t) malloc(sizeof (*be))) == 0) 162*0Sstevel@tonic-gate return (0); 163*0Sstevel@tonic-gate 164*0Sstevel@tonic-gate be->ops = ops; 165*0Sstevel@tonic-gate be->n_ops = n_ops; 166*0Sstevel@tonic-gate return ((nss_backend_t *) be); 167*0Sstevel@tonic-gate } 168