1 /* $OpenBSD: clnt_generic.c,v 1.5 2005/08/08 08:05:35 espie Exp $ */
2 /*
3 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
4 * unrestricted use provided that this legend is included on all tape
5 * media and as a part of the software program in whole or part. Users
6 * may copy or modify Sun RPC without charge, but are not authorized
7 * to license or distribute it to anyone else except as part of a product or
8 * program developed by the user.
9 *
10 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
11 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
12 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
13 *
14 * Sun RPC is provided with no support and without any obligation on the
15 * part of Sun Microsystems, Inc. to assist in its use, correction,
16 * modification or enhancement.
17 *
18 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
19 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
20 * OR ANY PART THEREOF.
21 *
22 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
23 * or profits or other special, indirect and consequential damages, even if
24 * Sun has been advised of the possibility of such damages.
25 *
26 * Sun Microsystems, Inc.
27 * 2550 Garcia Avenue
28 * Mountain View, California 94043
29 */
30
31 /*
32 * Copyright (C) 1987, Sun Microsystems, Inc.
33 */
34 #include <string.h>
35 #include <rpc/rpc.h>
36 #include <sys/socket.h>
37 #include <sys/errno.h>
38 #include <netdb.h>
39
40 /*
41 * Generic client creation: takes (hostname, program-number, protocol) and
42 * returns client handle. Default options are set, which the user can
43 * change using the rpc equivalent of ioctl()'s.
44 */
45 CLIENT *
clnt_create(char * hostname,u_long prog,u_long vers,char * proto)46 clnt_create(char *hostname, u_long prog, u_long vers, char *proto)
47 {
48 struct hostent *h;
49 struct protoent *p;
50 struct sockaddr_in sin;
51 int sock;
52 struct timeval tv;
53 CLIENT *client;
54
55 h = gethostbyname(hostname);
56 if (h == NULL) {
57 rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
58 return (NULL);
59 }
60 if (h->h_addrtype != AF_INET) {
61 /*
62 * Only support INET for now
63 */
64 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
65 rpc_createerr.cf_error.re_errno = EAFNOSUPPORT;
66 return (NULL);
67 }
68 memset(&sin, 0, sizeof(sin));
69 sin.sin_len = sizeof(struct sockaddr_in);
70 sin.sin_family = h->h_addrtype;
71 sin.sin_port = 0;
72 memcpy((char*)&sin.sin_addr, h->h_addr, h->h_length);
73 p = getprotobyname(proto);
74 if (p == NULL) {
75 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
76 rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
77 return (NULL);
78 }
79 sock = RPC_ANYSOCK;
80 switch (p->p_proto) {
81 case IPPROTO_UDP:
82 tv.tv_sec = 5;
83 tv.tv_usec = 0;
84 client = clntudp_create(&sin, prog, vers, tv, &sock);
85 if (client == NULL) {
86 return (NULL);
87 }
88 break;
89 case IPPROTO_TCP:
90 client = clnttcp_create(&sin, prog, vers, &sock, 0, 0);
91 if (client == NULL) {
92 return (NULL);
93 }
94 break;
95 default:
96 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
97 rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
98 return (NULL);
99 }
100 return (client);
101 }
102