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clnt_generic.c revision 1.4 
      1 /*	$NetBSD: clnt_generic.c,v 1.4 1995/02/25 03:01:38 cgd Exp $	*/
      2 
      3 /*
      4  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
      5  * unrestricted use provided that this legend is included on all tape
      6  * media and as a part of the software program in whole or part.  Users
      7  * may copy or modify Sun RPC without charge, but are not authorized
      8  * to license or distribute it to anyone else except as part of a product or
      9  * program developed by the user.
     10  *
     11  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
     12  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
     13  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
     14  *
     15  * Sun RPC is provided with no support and without any obligation on the
     16  * part of Sun Microsystems, Inc. to assist in its use, correction,
     17  * modification or enhancement.
     18  *
     19  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
     20  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
     21  * OR ANY PART THEREOF.
     22  *
     23  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
     24  * or profits or other special, indirect and consequential damages, even if
     25  * Sun has been advised of the possibility of such damages.
     26  *
     27  * Sun Microsystems, Inc.
     28  * 2550 Garcia Avenue
     29  * Mountain View, California  94043
     30  */
     31 
     32 #if defined(LIBC_SCCS) && !defined(lint)
     33 /*static char *sccsid = "from: @(#)clnt_generic.c 1.4 87/08/11 (C) 1987 SMI";*/
     34 /*static char *sccsid = "from: @(#)clnt_generic.c	2.2 88/08/01 4.0 RPCSRC";*/
     35 static char *rcsid = "$NetBSD: clnt_generic.c,v 1.4 1995/02/25 03:01:38 cgd Exp $";
     36 #endif
     37 
     38 /*
     39  * Copyright (C) 1987, Sun Microsystems, Inc.
     40  */
     41 #include <rpc/rpc.h>
     42 #include <sys/socket.h>
     43 #include <sys/errno.h>
     44 #include <netdb.h>
     45 
     46 /*
     47  * Generic client creation: takes (hostname, program-number, protocol) and
     48  * returns client handle. Default options are set, which the user can
     49  * change using the rpc equivalent of ioctl()'s.
     50  */
     51 CLIENT *
     52 clnt_create(hostname, prog, vers, proto)
     53 	char *hostname;
     54 	u_long prog;
     55 	u_long vers;
     56 	char *proto;
     57 {
     58 	struct hostent *h;
     59 	struct protoent *p;
     60 	struct sockaddr_in sin;
     61 	int sock;
     62 	struct timeval tv;
     63 	CLIENT *client;
     64 
     65 	h = gethostbyname(hostname);
     66 	if (h == NULL) {
     67 		rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
     68 		return (NULL);
     69 	}
     70 	if (h->h_addrtype != AF_INET) {
     71 		/*
     72 		 * Only support INET for now
     73 		 */
     74 		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
     75 		rpc_createerr.cf_error.re_errno = EAFNOSUPPORT;
     76 		return (NULL);
     77 	}
     78 	bzero((char *)&sin, sizeof sin);
     79 	sin.sin_family = h->h_addrtype;
     80 	sin.sin_port = 0;
     81 	bcopy(h->h_addr, (char*)&sin.sin_addr, h->h_length);
     82 	p = getprotobyname(proto);
     83 	if (p == NULL) {
     84 		rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
     85 		rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
     86 		return (NULL);
     87 	}
     88 	sock = RPC_ANYSOCK;
     89 	switch (p->p_proto) {
     90 	case IPPROTO_UDP:
     91 		tv.tv_sec = 5;
     92 		tv.tv_usec = 0;
     93 		client = clntudp_create(&sin, prog, vers, tv, &sock);
     94 		if (client == NULL) {
     95 			return (NULL);
     96 		}
     97 		break;
     98 	case IPPROTO_TCP:
     99 		client = clnttcp_create(&sin, prog, vers, &sock, 0, 0);
    100 		if (client == NULL) {
    101 			return (NULL);
    102 		}
    103 		break;
    104 	default:
    105 		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
    106 		rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
    107 		return (NULL);
    108 	}
    109 	return (client);
    110 }
    111