17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 77c478bd9Sstevel@tonic-gate * with the License. 87c478bd9Sstevel@tonic-gate * 97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 127c478bd9Sstevel@tonic-gate * and limitations under the License. 137c478bd9Sstevel@tonic-gate * 147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 197c478bd9Sstevel@tonic-gate * 207c478bd9Sstevel@tonic-gate * CDDL HEADER END 217c478bd9Sstevel@tonic-gate */ 22*61961e0fSrobinson 237c478bd9Sstevel@tonic-gate /* 24*61961e0fSrobinson * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 257c478bd9Sstevel@tonic-gate * Use is subject to license terms. 267c478bd9Sstevel@tonic-gate */ 277c478bd9Sstevel@tonic-gate 287c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 297c478bd9Sstevel@tonic-gate 307c478bd9Sstevel@tonic-gate /* 317c478bd9Sstevel@tonic-gate * lib/libnsl/nss/gethostbyname_r.c 327c478bd9Sstevel@tonic-gate * 337c478bd9Sstevel@tonic-gate * gethostbyname_r() is defined in this file. It is implemented on top of 347c478bd9Sstevel@tonic-gate * _get_hostserv_inetnetdir_byname() which is also used to implement 357c478bd9Sstevel@tonic-gate * netdir_getbyname() for inet family transports. In turn the common code 367c478bd9Sstevel@tonic-gate * uses the name service switch policy for "hosts" and "services" unless 377c478bd9Sstevel@tonic-gate * the administrator chooses to bypass the name service switch by 387c478bd9Sstevel@tonic-gate * specifying third-party supplied nametoaddr libs for inet transports 397c478bd9Sstevel@tonic-gate * in /etc/netconfig. 407c478bd9Sstevel@tonic-gate * 417c478bd9Sstevel@tonic-gate * gethostbyaddr_r() is similarly related to _get_hostserv_inetnetdir_byaddr() 427c478bd9Sstevel@tonic-gate * and netdir_getbyaddr(); 437c478bd9Sstevel@tonic-gate * 447c478bd9Sstevel@tonic-gate * The common code lives in netdir_inet.c. 457c478bd9Sstevel@tonic-gate * 467c478bd9Sstevel@tonic-gate * gethostent_r(), sethostent() and endhostent() are *not* implemented on top 477c478bd9Sstevel@tonic-gate * of the common interface; they go straight to the switch and are 487c478bd9Sstevel@tonic-gate * defined in gethostent_r.c. 497c478bd9Sstevel@tonic-gate * 507c478bd9Sstevel@tonic-gate * There is absolutely no data sharing, not even the stayopen flag or 517c478bd9Sstevel@tonic-gate * enumeration state, between gethostbyYY_r() and gethostent_r(); 527c478bd9Sstevel@tonic-gate */ 537c478bd9Sstevel@tonic-gate 547c478bd9Sstevel@tonic-gate #include <netdb.h> 557c478bd9Sstevel@tonic-gate #include <netdir.h> 567c478bd9Sstevel@tonic-gate #include <sys/types.h> 577c478bd9Sstevel@tonic-gate #include <nss_netdir.h> 587c478bd9Sstevel@tonic-gate #include <string.h> 597c478bd9Sstevel@tonic-gate 607c478bd9Sstevel@tonic-gate extern struct netconfig *__rpc_getconfip(); 617c478bd9Sstevel@tonic-gate 627c478bd9Sstevel@tonic-gate /* 637c478bd9Sstevel@tonic-gate * h_errno POLICY: The frontends expect the name service 647c478bd9Sstevel@tonic-gate * backends to modify the h_errno in "arg"; _switch_gethostbyYY_r() 657c478bd9Sstevel@tonic-gate * will copy that over onto user's h_errnop pointer. This h_errno is 667c478bd9Sstevel@tonic-gate * never used for "switching" -- status from nss_search serves 677c478bd9Sstevel@tonic-gate * the purpose. There is no explicit zeroing in the case of success. 687c478bd9Sstevel@tonic-gate */ 697c478bd9Sstevel@tonic-gate 707c478bd9Sstevel@tonic-gate extern struct hostent * 717c478bd9Sstevel@tonic-gate _switch_gethostbyname_r(const char *nam, struct hostent *result, char *buffer, 727c478bd9Sstevel@tonic-gate int buflen, int *h_errnop); 737c478bd9Sstevel@tonic-gate 747c478bd9Sstevel@tonic-gate extern struct hostent * 757c478bd9Sstevel@tonic-gate _switch_gethostbyaddr_r(const char *addr, int length, int type, 767c478bd9Sstevel@tonic-gate struct hostent *result, char *buffer, int buflen, int *h_errnop); 777c478bd9Sstevel@tonic-gate 787c478bd9Sstevel@tonic-gate #ifdef PIC 797c478bd9Sstevel@tonic-gate struct hostent * 807c478bd9Sstevel@tonic-gate _uncached_gethostbyname_r(const char *nam, struct hostent *result, 817c478bd9Sstevel@tonic-gate char *buffer, int buflen, int *h_errnop) 827c478bd9Sstevel@tonic-gate { 837c478bd9Sstevel@tonic-gate return (_switch_gethostbyname_r(nam, result, 847c478bd9Sstevel@tonic-gate buffer, buflen, h_errnop)); 857c478bd9Sstevel@tonic-gate } 867c478bd9Sstevel@tonic-gate 877c478bd9Sstevel@tonic-gate struct hostent * 887c478bd9Sstevel@tonic-gate _uncached_gethostbyaddr_r(const char *addr, int length, int type, 897c478bd9Sstevel@tonic-gate struct hostent *result, char *buffer, int buflen, int *h_errnop) 907c478bd9Sstevel@tonic-gate { 917c478bd9Sstevel@tonic-gate return (_switch_gethostbyaddr_r(addr, length, type, 927c478bd9Sstevel@tonic-gate result, buffer, buflen, h_errnop)); 937c478bd9Sstevel@tonic-gate } 947c478bd9Sstevel@tonic-gate 957c478bd9Sstevel@tonic-gate #endif 967c478bd9Sstevel@tonic-gate 977c478bd9Sstevel@tonic-gate extern struct hostent * 987c478bd9Sstevel@tonic-gate gethostbyname_r(const char *nam, struct hostent *result, char *buffer, 997c478bd9Sstevel@tonic-gate int buflen, int *h_errnop); 1007c478bd9Sstevel@tonic-gate 1017c478bd9Sstevel@tonic-gate extern struct hostent * 1027c478bd9Sstevel@tonic-gate gethostbyaddr_r(const char *addr, int length, int type, 1037c478bd9Sstevel@tonic-gate struct hostent *result, char *buffer, int buflen, int *h_errnop); 1047c478bd9Sstevel@tonic-gate 1057c478bd9Sstevel@tonic-gate struct hostent * 1067c478bd9Sstevel@tonic-gate gethostbyname_r(const char *nam, struct hostent *result, char *buffer, 1077c478bd9Sstevel@tonic-gate int buflen, int *h_errnop) 1087c478bd9Sstevel@tonic-gate { 1097c478bd9Sstevel@tonic-gate struct netconfig *nconf; 1107c478bd9Sstevel@tonic-gate struct nss_netdirbyname_in nssin; 1117c478bd9Sstevel@tonic-gate union nss_netdirbyname_out nssout; 1127c478bd9Sstevel@tonic-gate int neterr, dummy; 1137c478bd9Sstevel@tonic-gate 1147c478bd9Sstevel@tonic-gate if (h_errnop == NULL) 1157c478bd9Sstevel@tonic-gate h_errnop = &dummy; 1167c478bd9Sstevel@tonic-gate 1177c478bd9Sstevel@tonic-gate if (strlen(nam) == 0) { 1187c478bd9Sstevel@tonic-gate *h_errnop = HOST_NOT_FOUND; 119*61961e0fSrobinson return (NULL); 1207c478bd9Sstevel@tonic-gate } 1217c478bd9Sstevel@tonic-gate 1227c478bd9Sstevel@tonic-gate if ((nconf = __rpc_getconfip("udp")) == NULL && 1237c478bd9Sstevel@tonic-gate (nconf = __rpc_getconfip("tcp")) == NULL) { 1247c478bd9Sstevel@tonic-gate *h_errnop = NO_RECOVERY; 125*61961e0fSrobinson return (NULL); 1267c478bd9Sstevel@tonic-gate } 1277c478bd9Sstevel@tonic-gate 1287c478bd9Sstevel@tonic-gate nssin.op_t = NSS_HOST; 1297c478bd9Sstevel@tonic-gate nssin.arg.nss.host.name = nam; 1307c478bd9Sstevel@tonic-gate nssin.arg.nss.host.buf = buffer; 1317c478bd9Sstevel@tonic-gate nssin.arg.nss.host.buflen = buflen; 1327c478bd9Sstevel@tonic-gate 1337c478bd9Sstevel@tonic-gate nssout.nss.host.hent = result; 1347c478bd9Sstevel@tonic-gate nssout.nss.host.herrno_p = h_errnop; 1357c478bd9Sstevel@tonic-gate 1367c478bd9Sstevel@tonic-gate /* 1377c478bd9Sstevel@tonic-gate * We pass in nconf and let the implementation of the long-named func 1387c478bd9Sstevel@tonic-gate * decide whether to use the switch based on nc_nlookups. 1397c478bd9Sstevel@tonic-gate */ 1407c478bd9Sstevel@tonic-gate neterr = _get_hostserv_inetnetdir_byname(nconf, &nssin, &nssout); 1417c478bd9Sstevel@tonic-gate 1427c478bd9Sstevel@tonic-gate (void) freenetconfigent(nconf); 143*61961e0fSrobinson if (neterr != ND_OK) 144*61961e0fSrobinson return (NULL); 1457c478bd9Sstevel@tonic-gate return (nssout.nss.host.hent); 1467c478bd9Sstevel@tonic-gate } 1477c478bd9Sstevel@tonic-gate 1487c478bd9Sstevel@tonic-gate struct hostent * 1497c478bd9Sstevel@tonic-gate gethostbyaddr_r(const char *addr, int length, int type, 1507c478bd9Sstevel@tonic-gate struct hostent *result, char *buffer, int buflen, int *h_errnop) 1517c478bd9Sstevel@tonic-gate { 1527c478bd9Sstevel@tonic-gate struct netconfig *nconf; 1537c478bd9Sstevel@tonic-gate struct nss_netdirbyaddr_in nssin; 1547c478bd9Sstevel@tonic-gate union nss_netdirbyaddr_out nssout; 1557c478bd9Sstevel@tonic-gate int neterr; 1567c478bd9Sstevel@tonic-gate 1577c478bd9Sstevel@tonic-gate if (type != AF_INET) { 1587c478bd9Sstevel@tonic-gate *h_errnop = HOST_NOT_FOUND; 159*61961e0fSrobinson return (NULL); 1607c478bd9Sstevel@tonic-gate } 1617c478bd9Sstevel@tonic-gate 1627c478bd9Sstevel@tonic-gate if ((nconf = __rpc_getconfip("udp")) == NULL && 1637c478bd9Sstevel@tonic-gate (nconf = __rpc_getconfip("tcp")) == NULL) { 1647c478bd9Sstevel@tonic-gate *h_errnop = NO_RECOVERY; 165*61961e0fSrobinson return (NULL); 1667c478bd9Sstevel@tonic-gate } 1677c478bd9Sstevel@tonic-gate 1687c478bd9Sstevel@tonic-gate nssin.op_t = NSS_HOST; 1697c478bd9Sstevel@tonic-gate nssin.arg.nss.host.addr = addr; 1707c478bd9Sstevel@tonic-gate nssin.arg.nss.host.len = length; 1717c478bd9Sstevel@tonic-gate nssin.arg.nss.host.type = type; 1727c478bd9Sstevel@tonic-gate nssin.arg.nss.host.buf = buffer; 1737c478bd9Sstevel@tonic-gate nssin.arg.nss.host.buflen = buflen; 1747c478bd9Sstevel@tonic-gate 1757c478bd9Sstevel@tonic-gate nssout.nss.host.hent = result; 1767c478bd9Sstevel@tonic-gate nssout.nss.host.herrno_p = h_errnop; 1777c478bd9Sstevel@tonic-gate 1787c478bd9Sstevel@tonic-gate /* 1797c478bd9Sstevel@tonic-gate * We pass in nconf and let the implementation of this long-named func 1807c478bd9Sstevel@tonic-gate * decide whether to use the switch based on nc_nlookups. 1817c478bd9Sstevel@tonic-gate */ 1827c478bd9Sstevel@tonic-gate neterr = _get_hostserv_inetnetdir_byaddr(nconf, &nssin, &nssout); 1837c478bd9Sstevel@tonic-gate 1847c478bd9Sstevel@tonic-gate (void) freenetconfigent(nconf); 185*61961e0fSrobinson if (neterr != ND_OK) 186*61961e0fSrobinson return (NULL); 1877c478bd9Sstevel@tonic-gate return (nssout.nss.host.hent); 1887c478bd9Sstevel@tonic-gate } 189