1 /* $OpenBSD: clnt_simple.c,v 1.12 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 * clnt_simple.c
33 * Simplified front end to rpc.
34 *
35 * Copyright (C) 1984, Sun Microsystems, Inc.
36 */
37
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <string.h>
41 #include <rpc/rpc.h>
42 #include <sys/socket.h>
43 #include <netdb.h>
44 #include <unistd.h>
45
46 static struct callrpc_private {
47 CLIENT *client;
48 int socket;
49 int oldprognum, oldversnum, valid;
50 char *oldhost;
51 } *callrpc_private;
52
53 int
callrpc(char * host,int prognum,int versnum,int procnum,xdrproc_t inproc,char * in,xdrproc_t outproc,char * out)54 callrpc(char *host, int prognum, int versnum, int procnum, xdrproc_t inproc,
55 char *in, xdrproc_t outproc, char *out)
56 {
57 struct callrpc_private *save_callrpc_private = callrpc_private;
58 struct callrpc_private *crp = callrpc_private;
59 struct sockaddr_in server_addr;
60 enum clnt_stat clnt_stat;
61 struct hostent *hp;
62 struct timeval timeout, tottimeout;
63
64 if (crp == NULL) {
65 crp = (struct callrpc_private *)calloc(1, sizeof (*crp));
66 if (crp == NULL)
67 return (0);
68 callrpc_private = crp;
69 }
70 if (crp->oldhost == NULL) {
71 crp->oldhost = malloc(MAXHOSTNAMELEN);
72 if (crp->oldhost == NULL) {
73 free(crp);
74 callrpc_private = save_callrpc_private;
75 return (0);
76 }
77 crp->oldhost[0] = 0;
78 crp->socket = RPC_ANYSOCK;
79 }
80 if (crp->valid && crp->oldprognum == prognum && crp->oldversnum == versnum
81 && strcmp(crp->oldhost, host) == 0) {
82 /* reuse old client */
83 } else {
84 crp->valid = 0;
85 if (crp->socket != -1)
86 (void)close(crp->socket);
87 crp->socket = RPC_ANYSOCK;
88 if (crp->client) {
89 clnt_destroy(crp->client);
90 crp->client = NULL;
91 }
92 if ((hp = gethostbyname(host)) == NULL)
93 return ((int) RPC_UNKNOWNHOST);
94 timeout.tv_usec = 0;
95 timeout.tv_sec = 5;
96 memset(&server_addr, 0, sizeof(server_addr));
97 memcpy((char *)&server_addr.sin_addr, hp->h_addr, hp->h_length);
98 server_addr.sin_len = sizeof(struct sockaddr_in);
99 server_addr.sin_family = AF_INET;
100 server_addr.sin_port = 0;
101 if ((crp->client = clntudp_create(&server_addr, (u_long)prognum,
102 (u_long)versnum, timeout, &crp->socket)) == NULL)
103 return ((int) rpc_createerr.cf_stat);
104 crp->valid = 1;
105 crp->oldprognum = prognum;
106 crp->oldversnum = versnum;
107 strlcpy(crp->oldhost, host, MAXHOSTNAMELEN);
108 }
109 tottimeout.tv_sec = 25;
110 tottimeout.tv_usec = 0;
111 clnt_stat = clnt_call(crp->client, procnum, inproc, in,
112 outproc, out, tottimeout);
113 /*
114 * if call failed, empty cache
115 */
116 if (clnt_stat != RPC_SUCCESS)
117 crp->valid = 0;
118 return ((int) clnt_stat);
119 }
120