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clnt_generic.c revision 1.5 
      1 /*	$NetBSD: clnt_generic.c,v 1.5 1995/04/14 19:48:23 jtc 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 1.5 1995/04/14 19:48:23 jtc Exp $";
     36 #endif
     37 
     38 /*
     39  * Copyright (C) 1987, Sun Microsystems, Inc.
     40  */
     41 #include <string.h>
     42 #include <rpc/rpc.h>
     43 #include <sys/socket.h>
     44 #include <sys/errno.h>
     45 #include <netdb.h>
     46 
     47 /*
     48  * Generic client creation: takes (hostname, program-number, protocol) and
     49  * returns client handle. Default options are set, which the user can
     50  * change using the rpc equivalent of ioctl()'s.
     51  */
     52 CLIENT *
     53 clnt_create(hostname, prog, vers, proto)
     54 	char *hostname;
     55 	u_long prog;
     56 	u_long vers;
     57 	char *proto;
     58 {
     59 	struct hostent *h;
     60 	struct protoent *p;
     61 	struct sockaddr_in sin;
     62 	int sock;
     63 	struct timeval tv;
     64 	CLIENT *client;
     65 
     66 	h = gethostbyname(hostname);
     67 	if (h == NULL) {
     68 		rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
     69 		return (NULL);
     70 	}
     71 	if (h->h_addrtype != AF_INET) {
     72 		/*
     73 		 * Only support INET for now
     74 		 */
     75 		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
     76 		rpc_createerr.cf_error.re_errno = EAFNOSUPPORT;
     77 		return (NULL);
     78 	}
     79 	memset(&sin, 0, sizeof(sin));
     80 	sin.sin_family = h->h_addrtype;
     81 	sin.sin_port = 0;
     82 	bcopy(h->h_addr, (char*)&sin.sin_addr, h->h_length);
     83 	p = getprotobyname(proto);
     84 	if (p == NULL) {
     85 		rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
     86 		rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
     87 		return (NULL);
     88 	}
     89 	sock = RPC_ANYSOCK;
     90 	switch (p->p_proto) {
     91 	case IPPROTO_UDP:
     92 		tv.tv_sec = 5;
     93 		tv.tv_usec = 0;
     94 		client = clntudp_create(&sin, prog, vers, tv, &sock);
     95 		if (client == NULL) {
     96 			return (NULL);
     97 		}
     98 		break;
     99 	case IPPROTO_TCP:
    100 		client = clnttcp_create(&sin, prog, vers, &sock, 0, 0);
    101 		if (client == NULL) {
    102 			return (NULL);
    103 		}
    104 		break;
    105 	default:
    106 		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
    107 		rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
    108 		return (NULL);
    109 	}
    110 	return (client);
    111 }
    112