Home | History | Annotate | Line # | Download | only in rpc
clnt_generic.c revision 1.14 
      1 /*	$NetBSD: clnt_generic.c,v 1.14 1999/09/20 04:39:20 lukem 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 #include <sys/cdefs.h>
     33 #if defined(LIBC_SCCS) && !defined(lint)
     34 #if 0
     35 static char *sccsid = "@(#)clnt_generic.c 1.4 87/08/11 (C) 1987 SMI";
     36 static char *sccsid = "@(#)clnt_generic.c	2.2 88/08/01 4.0 RPCSRC";
     37 #else
     38 __RCSID("$NetBSD: clnt_generic.c,v 1.14 1999/09/20 04:39:20 lukem Exp $");
     39 #endif
     40 #endif
     41 
     42 /*
     43  * Copyright (C) 1987, Sun Microsystems, Inc.
     44  */
     45 #include "namespace.h"
     46 
     47 #include <sys/types.h>
     48 #include <sys/socket.h>
     49 
     50 #include <assert.h>
     51 #include <errno.h>
     52 #include <netdb.h>
     53 #include <string.h>
     54 
     55 #include <rpc/rpc.h>
     56 
     57 #ifdef __weak_alias
     58 __weak_alias(clnt_create,_clnt_create);
     59 #endif
     60 
     61 /*
     62  * Generic client creation: takes (hostname, program-number, protocol) and
     63  * returns client handle. Default options are set, which the user can
     64  * change using the rpc equivalent of ioctl()'s.
     65  */
     66 CLIENT *
     67 clnt_create(hostname, prog, vers, proto)
     68 	char *hostname;
     69 	u_long prog;
     70 	u_long vers;
     71 	char *proto;
     72 {
     73 	struct hostent *h;
     74 	struct protoent *p;
     75 	struct sockaddr_in sin;
     76 	int sock;
     77 	struct timeval tv;
     78 	CLIENT *client;
     79 
     80 	_DIAGASSERT(hostname != NULL);
     81 	_DIAGASSERT(proto != NULL);
     82 
     83 	h = gethostbyname(hostname);
     84 	if (h == NULL) {
     85 		rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
     86 		return (NULL);
     87 	}
     88 	if (h->h_addrtype != AF_INET) {
     89 		/*
     90 		 * Only support INET for now
     91 		 */
     92 		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
     93 		rpc_createerr.cf_error.re_errno = EAFNOSUPPORT;
     94 		return (NULL);
     95 	}
     96 	memset(&sin, 0, sizeof(sin));
     97 	sin.sin_len = sizeof(struct sockaddr_in);
     98 	sin.sin_family = h->h_addrtype;
     99 	sin.sin_port = 0;
    100 	if (h->h_length > sin.sin_len)
    101 		h->h_length = sin.sin_len;
    102 	memcpy(&sin.sin_addr.s_addr, h->h_addr, (size_t)h->h_length);
    103 	p = getprotobyname(proto);
    104 	if (p == NULL) {
    105 		rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
    106 		rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
    107 		return (NULL);
    108 	}
    109 	sock = RPC_ANYSOCK;
    110 	switch (p->p_proto) {
    111 	case IPPROTO_UDP:
    112 		tv.tv_sec = 5;
    113 		tv.tv_usec = 0;
    114 		client = clntudp_create(&sin, prog, vers, tv, &sock);
    115 		if (client == NULL) {
    116 			return (NULL);
    117 		}
    118 		break;
    119 	case IPPROTO_TCP:
    120 		client = clnttcp_create(&sin, prog, vers, &sock, 0, 0);
    121 		if (client == NULL) {
    122 			return (NULL);
    123 		}
    124 		break;
    125 	default:
    126 		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
    127 		rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
    128 		return (NULL);
    129 	}
    130 	return (client);
    131 }
    132