Home | History | Annotate | Line # | Download | only in rpc
clnt_generic.c revision 1.1 
      1 /*
      2  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
      3  * unrestricted use provided that this legend is included on all tape
      4  * media and as a part of the software program in whole or part.  Users
      5  * may copy or modify Sun RPC without charge, but are not authorized
      6  * to license or distribute it to anyone else except as part of a product or
      7  * program developed by the user.
      8  *
      9  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
     10  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
     11  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
     12  *
     13  * Sun RPC is provided with no support and without any obligation on the
     14  * part of Sun Microsystems, Inc. to assist in its use, correction,
     15  * modification or enhancement.
     16  *
     17  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
     18  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
     19  * OR ANY PART THEREOF.
     20  *
     21  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
     22  * or profits or other special, indirect and consequential damages, even if
     23  * Sun has been advised of the possibility of such damages.
     24  *
     25  * Sun Microsystems, Inc.
     26  * 2550 Garcia Avenue
     27  * Mountain View, California  94043
     28  */
     29 
     30 #if defined(LIBC_SCCS) && !defined(lint)
     31 /*static char *sccsid = "from: @(#)clnt_generic.c 1.4 87/08/11 (C) 1987 SMI";*/
     32 /*static char *sccsid = "from: @(#)clnt_generic.c	2.2 88/08/01 4.0 RPCSRC";*/
     33 static char *rcsid = "$Id: clnt_generic.c,v 1.1 1993/10/07 07:29:41 cgd Exp $";
     34 #endif
     35 
     36 /*
     37  * Copyright (C) 1987, Sun Microsystems, Inc.
     38  */
     39 #include <rpc/rpc.h>
     40 #include <sys/socket.h>
     41 #include <sys/errno.h>
     42 #include <netdb.h>
     43 
     44 /*
     45  * Generic client creation: takes (hostname, program-number, protocol) and
     46  * returns client handle. Default options are set, which the user can
     47  * change using the rpc equivalent of ioctl()'s.
     48  */
     49 CLIENT *
     50 clnt_create(hostname, prog, vers, proto)
     51 	char *hostname;
     52 	u_long prog;
     53 	u_long vers;
     54 	char *proto;
     55 {
     56 	struct hostent *h;
     57 	struct protoent *p;
     58 	struct sockaddr_in sin;
     59 	int sock;
     60 	struct timeval tv;
     61 	CLIENT *client;
     62 
     63 	h = gethostbyname(hostname);
     64 	if (h == NULL) {
     65 		rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
     66 		return (NULL);
     67 	}
     68 	if (h->h_addrtype != AF_INET) {
     69 		/*
     70 		 * Only support INET for now
     71 		 */
     72 		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
     73 		rpc_createerr.cf_error.re_errno = EAFNOSUPPORT;
     74 		return (NULL);
     75 	}
     76 	sin.sin_family = h->h_addrtype;
     77 	sin.sin_port = 0;
     78 	bzero(sin.sin_zero, sizeof(sin.sin_zero));
     79 	bcopy(h->h_addr, (char*)&sin.sin_addr, h->h_length);
     80 	p = getprotobyname(proto);
     81 	if (p == NULL) {
     82 		rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
     83 		rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
     84 		return (NULL);
     85 	}
     86 	sock = RPC_ANYSOCK;
     87 	switch (p->p_proto) {
     88 	case IPPROTO_UDP:
     89 		tv.tv_sec = 5;
     90 		tv.tv_usec = 0;
     91 		client = clntudp_create(&sin, prog, vers, tv, &sock);
     92 		if (client == NULL) {
     93 			return (NULL);
     94 		}
     95 		tv.tv_sec = 25;
     96 		clnt_control(client, CLSET_TIMEOUT, &tv);
     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 		tv.tv_sec = 25;
    104 		tv.tv_usec = 0;
    105 		clnt_control(client, CLSET_TIMEOUT, &tv);
    106 		break;
    107 	default:
    108 		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
    109 		rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
    110 		return (NULL);
    111 	}
    112 	return (client);
    113 }
    114