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      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, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /*
     23  * 	Copyright (c) 1991-1994  Sun Microsystems, Inc
     24  *
     25  * lib/libsocket/inet/getservbyname_r.c
     26  *
     27  * getservbyname_r() is defined in this file. It is implemented on top of
     28  *   _get_hostserv_inetnetdir_byname() which is also used to implement
     29  *   netdir_getbyname() for inet family transports.  In turn the common code
     30  *   uses the name service switch policy for "hosts" and "services" unless
     31  *   the administrator chooses to bypass the name service switch by
     32  *   specifying third-party supplied nametoaddr libs for inet transports
     33  *   in /etc/netconfig.
     34  *
     35  * getservbyport_r() is similarly related to _get_hostserv_inetnetdir_byaddr()
     36  *   and netdir_getbyaddr();
     37  *
     38  * The common code lives in lib/libnsl/nss/netdir_inet.c.
     39  *
     40  * getservent_r(), setservent() and endservent() are *not* implemented on top
     41  *   of the common interface;  they go straight to the switch and are
     42  *   defined in getservent_r.c.
     43  *
     44  * There is absolutely no data sharing, not even the stayopen flag or
     45  *   enumeration state, between getservbyYY_r() and getservent_r();
     46  */
     47 
     48 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     49 
     50 #include <netdb.h>
     51 #include <netdir.h>
     52 #include <sys/types.h>
     53 #include <nss_netdir.h>
     54 
     55 extern int str2servent(const char *, int, void *, char *, int);
     56 extern struct netconfig *__rpc_getconfip();
     57 
     58 struct servent *
     59 getservbyname_r(const char *name, const char *proto, struct servent *result,
     60 	char *buffer, int buflen)
     61 {
     62 	struct netconfig *nconf;
     63 	struct	nss_netdirbyname_in nssin;
     64 	union	nss_netdirbyname_out nssout;
     65 	int neterr;
     66 
     67 	if ((nconf = __rpc_getconfip("udp")) == NULL &&
     68 	    (nconf = __rpc_getconfip("tcp")) == NULL) {
     69 		return ((struct servent *)NULL);
     70 	}
     71 	nssin.op_t = NSS_SERV;
     72 	nssin.arg.nss.serv.name = name;
     73 	nssin.arg.nss.serv.proto = proto;
     74 	nssin.arg.nss.serv.buf = buffer;
     75 	nssin.arg.nss.serv.buflen = buflen;
     76 
     77 	nssout.nss.serv = result;
     78 
     79 	/*
     80 	 * We pass in nconf and let the implementation of the long-named func
     81 	 * decide whether to use the switch based on nc_nlookups.
     82 	 */
     83 	neterr = _get_hostserv_inetnetdir_byname(nconf, &nssin, &nssout);
     84 
     85 	(void) freenetconfigent(nconf);
     86 	if (neterr != ND_OK) {
     87 		return ((struct servent *)NULL);
     88 	}
     89 	return (nssout.nss.serv);
     90 }
     91 
     92 struct servent *
     93 getservbyport_r(int port, const char *proto, struct servent *result,
     94 	char *buffer, int buflen)
     95 {
     96 	struct netconfig *nconf;
     97 	struct	nss_netdirbyaddr_in nssin;
     98 	union	nss_netdirbyaddr_out nssout;
     99 	int neterr;
    100 
    101 	if ((nconf = __rpc_getconfip("udp")) == NULL &&
    102 	    (nconf = __rpc_getconfip("tcp")) == NULL) {
    103 		return ((struct servent *)NULL);
    104 	}
    105 	nssin.op_t = NSS_SERV;
    106 	nssin.arg.nss.serv.port = port;
    107 	nssin.arg.nss.serv.proto = proto;
    108 	nssin.arg.nss.serv.buf = buffer;
    109 	nssin.arg.nss.serv.buflen = buflen;
    110 
    111 	nssout.nss.serv = result;
    112 
    113 	/*
    114 	 * We pass in nconf and let the implementation of this long-named func
    115 	 * decide whether to use the switch based on nc_nlookups.
    116 	 */
    117 	neterr = _get_hostserv_inetnetdir_byaddr(nconf, &nssin, &nssout);
    118 
    119 	(void) freenetconfigent(nconf);
    120 	if (neterr != ND_OK) {
    121 		return ((struct servent *)NULL);
    122 	}
    123 	return (nssout.nss.serv);
    124 }
    125