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 * Copyright 2003 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate /* 30*0Sstevel@tonic-gate * lib/libnsl/nss/gethostbyname_r.c 31*0Sstevel@tonic-gate * 32*0Sstevel@tonic-gate * gethostbyname_r() is defined in this file. It is implemented on top of 33*0Sstevel@tonic-gate * _get_hostserv_inetnetdir_byname() which is also used to implement 34*0Sstevel@tonic-gate * netdir_getbyname() for inet family transports. In turn the common code 35*0Sstevel@tonic-gate * uses the name service switch policy for "hosts" and "services" unless 36*0Sstevel@tonic-gate * the administrator chooses to bypass the name service switch by 37*0Sstevel@tonic-gate * specifying third-party supplied nametoaddr libs for inet transports 38*0Sstevel@tonic-gate * in /etc/netconfig. 39*0Sstevel@tonic-gate * 40*0Sstevel@tonic-gate * gethostbyaddr_r() is similarly related to _get_hostserv_inetnetdir_byaddr() 41*0Sstevel@tonic-gate * and netdir_getbyaddr(); 42*0Sstevel@tonic-gate * 43*0Sstevel@tonic-gate * The common code lives in netdir_inet.c. 44*0Sstevel@tonic-gate * 45*0Sstevel@tonic-gate * gethostent_r(), sethostent() and endhostent() are *not* implemented on top 46*0Sstevel@tonic-gate * of the common interface; they go straight to the switch and are 47*0Sstevel@tonic-gate * defined in gethostent_r.c. 48*0Sstevel@tonic-gate * 49*0Sstevel@tonic-gate * There is absolutely no data sharing, not even the stayopen flag or 50*0Sstevel@tonic-gate * enumeration state, between gethostbyYY_r() and gethostent_r(); 51*0Sstevel@tonic-gate */ 52*0Sstevel@tonic-gate 53*0Sstevel@tonic-gate #include <netdb.h> 54*0Sstevel@tonic-gate #include <rpc/trace.h> 55*0Sstevel@tonic-gate #include <netdir.h> 56*0Sstevel@tonic-gate #include <sys/types.h> 57*0Sstevel@tonic-gate #include <nss_netdir.h> 58*0Sstevel@tonic-gate #include <string.h> 59*0Sstevel@tonic-gate 60*0Sstevel@tonic-gate extern struct netconfig *__rpc_getconfip(); 61*0Sstevel@tonic-gate 62*0Sstevel@tonic-gate /* 63*0Sstevel@tonic-gate * h_errno POLICY: The frontends expect the name service 64*0Sstevel@tonic-gate * backends to modify the h_errno in "arg"; _switch_gethostbyYY_r() 65*0Sstevel@tonic-gate * will copy that over onto user's h_errnop pointer. This h_errno is 66*0Sstevel@tonic-gate * never used for "switching" -- status from nss_search serves 67*0Sstevel@tonic-gate * the purpose. There is no explicit zeroing in the case of success. 68*0Sstevel@tonic-gate */ 69*0Sstevel@tonic-gate 70*0Sstevel@tonic-gate extern struct hostent * 71*0Sstevel@tonic-gate _switch_gethostbyname_r(const char *nam, struct hostent *result, char *buffer, 72*0Sstevel@tonic-gate int buflen, int *h_errnop); 73*0Sstevel@tonic-gate 74*0Sstevel@tonic-gate extern struct hostent * 75*0Sstevel@tonic-gate _switch_gethostbyaddr_r(const char *addr, int length, int type, 76*0Sstevel@tonic-gate struct hostent *result, char *buffer, int buflen, int *h_errnop); 77*0Sstevel@tonic-gate 78*0Sstevel@tonic-gate #ifdef PIC 79*0Sstevel@tonic-gate struct hostent * 80*0Sstevel@tonic-gate _uncached_gethostbyname_r(const char *nam, struct hostent *result, 81*0Sstevel@tonic-gate char *buffer, int buflen, int *h_errnop) 82*0Sstevel@tonic-gate { 83*0Sstevel@tonic-gate return (_switch_gethostbyname_r(nam, result, 84*0Sstevel@tonic-gate buffer, buflen, h_errnop)); 85*0Sstevel@tonic-gate } 86*0Sstevel@tonic-gate 87*0Sstevel@tonic-gate struct hostent * 88*0Sstevel@tonic-gate _uncached_gethostbyaddr_r(const char *addr, int length, int type, 89*0Sstevel@tonic-gate struct hostent *result, char *buffer, int buflen, int *h_errnop) 90*0Sstevel@tonic-gate { 91*0Sstevel@tonic-gate return (_switch_gethostbyaddr_r(addr, length, type, 92*0Sstevel@tonic-gate result, buffer, buflen, h_errnop)); 93*0Sstevel@tonic-gate } 94*0Sstevel@tonic-gate 95*0Sstevel@tonic-gate #endif 96*0Sstevel@tonic-gate 97*0Sstevel@tonic-gate extern struct hostent * 98*0Sstevel@tonic-gate gethostbyname_r(const char *nam, struct hostent *result, char *buffer, 99*0Sstevel@tonic-gate int buflen, int *h_errnop); 100*0Sstevel@tonic-gate 101*0Sstevel@tonic-gate extern struct hostent * 102*0Sstevel@tonic-gate gethostbyaddr_r(const char *addr, int length, int type, 103*0Sstevel@tonic-gate struct hostent *result, char *buffer, int buflen, int *h_errnop); 104*0Sstevel@tonic-gate 105*0Sstevel@tonic-gate struct hostent * 106*0Sstevel@tonic-gate gethostbyname_r(const char *nam, struct hostent *result, char *buffer, 107*0Sstevel@tonic-gate int buflen, int *h_errnop) 108*0Sstevel@tonic-gate { 109*0Sstevel@tonic-gate struct netconfig *nconf; 110*0Sstevel@tonic-gate struct nss_netdirbyname_in nssin; 111*0Sstevel@tonic-gate union nss_netdirbyname_out nssout; 112*0Sstevel@tonic-gate int neterr, dummy; 113*0Sstevel@tonic-gate 114*0Sstevel@tonic-gate trace2(TR_gethostbyname_r, 0, buflen); 115*0Sstevel@tonic-gate 116*0Sstevel@tonic-gate if (h_errnop == NULL) 117*0Sstevel@tonic-gate h_errnop = &dummy; 118*0Sstevel@tonic-gate 119*0Sstevel@tonic-gate if (strlen(nam) == 0) { 120*0Sstevel@tonic-gate *h_errnop = HOST_NOT_FOUND; 121*0Sstevel@tonic-gate trace2(TR_gethostbyname_r, 1, buflen); 122*0Sstevel@tonic-gate return ((struct hostent *)NULL); 123*0Sstevel@tonic-gate } 124*0Sstevel@tonic-gate 125*0Sstevel@tonic-gate if ((nconf = __rpc_getconfip("udp")) == NULL && 126*0Sstevel@tonic-gate (nconf = __rpc_getconfip("tcp")) == NULL) { 127*0Sstevel@tonic-gate *h_errnop = NO_RECOVERY; 128*0Sstevel@tonic-gate trace2(TR_gethostbyname_r, 1, buflen); 129*0Sstevel@tonic-gate return ((struct hostent *)NULL); 130*0Sstevel@tonic-gate } 131*0Sstevel@tonic-gate 132*0Sstevel@tonic-gate nssin.op_t = NSS_HOST; 133*0Sstevel@tonic-gate nssin.arg.nss.host.name = nam; 134*0Sstevel@tonic-gate nssin.arg.nss.host.buf = buffer; 135*0Sstevel@tonic-gate nssin.arg.nss.host.buflen = buflen; 136*0Sstevel@tonic-gate 137*0Sstevel@tonic-gate nssout.nss.host.hent = result; 138*0Sstevel@tonic-gate nssout.nss.host.herrno_p = h_errnop; 139*0Sstevel@tonic-gate 140*0Sstevel@tonic-gate /* 141*0Sstevel@tonic-gate * We pass in nconf and let the implementation of the long-named func 142*0Sstevel@tonic-gate * decide whether to use the switch based on nc_nlookups. 143*0Sstevel@tonic-gate */ 144*0Sstevel@tonic-gate neterr = _get_hostserv_inetnetdir_byname(nconf, &nssin, &nssout); 145*0Sstevel@tonic-gate 146*0Sstevel@tonic-gate (void) freenetconfigent(nconf); 147*0Sstevel@tonic-gate if (neterr != ND_OK) { 148*0Sstevel@tonic-gate trace2(TR_gethostbyname_r, 1, buflen); 149*0Sstevel@tonic-gate return ((struct hostent *)NULL); 150*0Sstevel@tonic-gate } 151*0Sstevel@tonic-gate trace2(TR_gethostbyname_r, 1, buflen); 152*0Sstevel@tonic-gate return (nssout.nss.host.hent); 153*0Sstevel@tonic-gate } 154*0Sstevel@tonic-gate 155*0Sstevel@tonic-gate struct hostent * 156*0Sstevel@tonic-gate gethostbyaddr_r(const char *addr, int length, int type, 157*0Sstevel@tonic-gate struct hostent *result, char *buffer, int buflen, int *h_errnop) 158*0Sstevel@tonic-gate { 159*0Sstevel@tonic-gate struct netconfig *nconf; 160*0Sstevel@tonic-gate struct nss_netdirbyaddr_in nssin; 161*0Sstevel@tonic-gate union nss_netdirbyaddr_out nssout; 162*0Sstevel@tonic-gate int neterr; 163*0Sstevel@tonic-gate 164*0Sstevel@tonic-gate trace3(TR_gethostbyaddr_r, 0, length, buflen); 165*0Sstevel@tonic-gate 166*0Sstevel@tonic-gate if (type != AF_INET) { 167*0Sstevel@tonic-gate *h_errnop = HOST_NOT_FOUND; 168*0Sstevel@tonic-gate return ((struct hostent *)NULL); 169*0Sstevel@tonic-gate } 170*0Sstevel@tonic-gate 171*0Sstevel@tonic-gate if ((nconf = __rpc_getconfip("udp")) == NULL && 172*0Sstevel@tonic-gate (nconf = __rpc_getconfip("tcp")) == NULL) { 173*0Sstevel@tonic-gate *h_errnop = NO_RECOVERY; 174*0Sstevel@tonic-gate trace3(TR_gethostbyaddr_r, 0, length, buflen); 175*0Sstevel@tonic-gate return ((struct hostent *)NULL); 176*0Sstevel@tonic-gate } 177*0Sstevel@tonic-gate 178*0Sstevel@tonic-gate nssin.op_t = NSS_HOST; 179*0Sstevel@tonic-gate nssin.arg.nss.host.addr = addr; 180*0Sstevel@tonic-gate nssin.arg.nss.host.len = length; 181*0Sstevel@tonic-gate nssin.arg.nss.host.type = type; 182*0Sstevel@tonic-gate nssin.arg.nss.host.buf = buffer; 183*0Sstevel@tonic-gate nssin.arg.nss.host.buflen = buflen; 184*0Sstevel@tonic-gate 185*0Sstevel@tonic-gate nssout.nss.host.hent = result; 186*0Sstevel@tonic-gate nssout.nss.host.herrno_p = h_errnop; 187*0Sstevel@tonic-gate 188*0Sstevel@tonic-gate /* 189*0Sstevel@tonic-gate * We pass in nconf and let the implementation of this long-named func 190*0Sstevel@tonic-gate * decide whether to use the switch based on nc_nlookups. 191*0Sstevel@tonic-gate */ 192*0Sstevel@tonic-gate neterr = _get_hostserv_inetnetdir_byaddr(nconf, &nssin, &nssout); 193*0Sstevel@tonic-gate 194*0Sstevel@tonic-gate (void) freenetconfigent(nconf); 195*0Sstevel@tonic-gate if (neterr != ND_OK) { 196*0Sstevel@tonic-gate trace3(TR_gethostbyaddr_r, 0, length, buflen); 197*0Sstevel@tonic-gate return ((struct hostent *)NULL); 198*0Sstevel@tonic-gate } 199*0Sstevel@tonic-gate return (nssout.nss.host.hent); 200*0Sstevel@tonic-gate } 201