clnt_generic.c revision 26221 
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";*/
33static char *rcsid = "$Id: clnt_generic.c,v 1.5 1996/12/30 14:17:20 peter 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#include <string.h>
44
45/*
46 * Generic client creation: takes (hostname, program-number, protocol) and
47 * returns client handle. Default options are set, which the user can
48 * change using the rpc equivalent of ioctl()'s.
49 */
50CLIENT *
51clnt_create(hostname, prog, vers, proto)
52	char *hostname;
53	u_long prog;
54	u_long vers;
55	char *proto;
56{
57	struct hostent *h;
58	struct protoent *p;
59	struct sockaddr_in sin;
60	struct sockaddr_un sun;
61	int sock;
62	static struct timeval tv;
63	CLIENT *client;
64
65	if (!strcmp(proto, "unix")) {
66		bzero((char *)&sun, sizeof(sun));
67		sun.sun_family = AF_UNIX;
68		strcpy(sun.sun_path, hostname);
69		sun.sun_len = sizeof(sun.sun_len) + sizeof(sun.sun_family) +
70				strlen(sun.sun_path) + 1;
71		sock = RPC_ANYSOCK;
72		client = clntunix_create(&sun, prog, vers, &sock, 0, 0);
73		if (client == NULL)
74			return(NULL);
75		tv.tv_sec = 25;
76		tv.tv_usec = 0;
77		clnt_control(client, CLSET_TIMEOUT, &tv);
78		return(client);
79	}
80
81	h = gethostbyname(hostname);
82	if (h == NULL) {
83		rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
84		return (NULL);
85	}
86	if (h->h_addrtype != AF_INET) {
87		/*
88		 * Only support INET for now
89		 */
90		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
91		rpc_createerr.cf_error.re_errno = EAFNOSUPPORT;
92		return (NULL);
93	}
94	memset(&sin, 0, sizeof(sin));
95	sin.sin_len = sizeof(struct sockaddr_in);
96	sin.sin_family = h->h_addrtype;
97	sin.sin_port = 0;
98	memcpy((char*)&sin.sin_addr, h->h_addr, h->h_length);
99	p = getprotobyname(proto);
100	if (p == NULL) {
101		rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
102		rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
103		return (NULL);
104	}
105	sock = RPC_ANYSOCK;
106	switch (p->p_proto) {
107	case IPPROTO_UDP:
108		tv.tv_sec = 5;
109		tv.tv_usec = 0;
110		client = clntudp_create(&sin, prog, vers, tv, &sock);
111		if (client == NULL) {
112			return (NULL);
113		}
114#if 0	/* XXX do we need this? */
115		tv.tv_sec = 25;
116		tv.tv_usec = 0;
117		clnt_control(client, CLSET_TIMEOUT, &tv);
118#endif
119		break;
120	case IPPROTO_TCP:
121		client = clnttcp_create(&sin, prog, vers, &sock, 0, 0);
122		if (client == NULL) {
123			return (NULL);
124		}
125#if 0	/* XXX do we need this? */
126		tv.tv_sec = 25;
127		tv.tv_usec = 0;
128		clnt_control(client, CLSET_TIMEOUT, &tv);
129#endif
130		break;
131	default:
132		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
133		rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
134		return (NULL);
135	}
136	return (client);
137}
138