1 /* @(#)clnt_simple.c 2.2 88/08/01 4.0 RPCSRC */
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 #if 0
31 static char sccsid[] = "@(#)clnt_simple.c 1.35 87/08/11 Copyr 1984 Sun Micro";
32 #endif
33
34 /*
35 * clnt_simple.c
36 * Simplified front end to rpc.
37 *
38 * Copyright (C) 1984, Sun Microsystems, Inc.
39 */
40
41 #include <alloca.h>
42 #include <errno.h>
43 #include <stdio.h>
44 #include <unistd.h>
45 #include "rpc_private.h"
46 #include <sys/socket.h>
47 #include <netdb.h>
48 #include <string.h>
49
50
51 struct callrpc_private_s
52 {
53 CLIENT *client;
54 int socket;
55 u_long oldprognum, oldversnum, valid;
56 char *oldhost;
57 };
58 #ifdef __UCLIBC_HAS_THREADS__
59 #define callrpc_private (*(struct callrpc_private_s **)&RPC_THREAD_VARIABLE(callrpc_private_s))
60 #else
61 static struct callrpc_private_s *callrpc_private;
62 #endif
63
64 int
callrpc(const char * host,u_long prognum,u_long versnum,u_long procnum,xdrproc_t inproc,const char * in,xdrproc_t outproc,char * out)65 callrpc (const char *host, u_long prognum, u_long versnum, u_long procnum,
66 xdrproc_t inproc, const char *in, xdrproc_t outproc, char *out)
67 {
68 struct callrpc_private_s *crp = callrpc_private;
69 struct sockaddr_in server_addr;
70 enum clnt_stat clnt_stat;
71 struct hostent hostbuf, *hp;
72 struct timeval timeout, tottimeout;
73
74 if (crp == 0)
75 {
76 crp = (struct callrpc_private_s *) calloc (1, sizeof (*crp));
77 if (crp == 0)
78 return 0;
79 callrpc_private = crp;
80 }
81 if (crp->oldhost == NULL)
82 {
83 crp->oldhost = malloc (256);
84 crp->oldhost[0] = 0;
85 crp->socket = RPC_ANYSOCK;
86 }
87 if (crp->valid && crp->oldprognum == prognum && crp->oldversnum == versnum
88 && strcmp (crp->oldhost, host) == 0)
89 {
90 /* reuse old client */
91 }
92 else
93 {
94 size_t buflen;
95 char *buffer;
96 int herr;
97
98 crp->valid = 0;
99 if (crp->socket != RPC_ANYSOCK)
100 {
101 (void) close (crp->socket);
102 crp->socket = RPC_ANYSOCK;
103 }
104 if (crp->client)
105 {
106 clnt_destroy (crp->client);
107 crp->client = NULL;
108 }
109
110 buflen = 1024;
111 buffer = alloca (buflen);
112 while (gethostbyname_r (host, &hostbuf, buffer, buflen,
113 &hp, &herr) != 0
114 || hp == NULL)
115 if (herr != NETDB_INTERNAL || errno != ERANGE)
116 return (int) RPC_UNKNOWNHOST;
117 else
118 {
119 /* Enlarge the buffer. */
120 buflen *= 2;
121 buffer = alloca (buflen);
122 }
123
124 timeout.tv_usec = 0;
125 timeout.tv_sec = 5;
126 memcpy ((char *) &server_addr.sin_addr, hp->h_addr, hp->h_length);
127 server_addr.sin_family = AF_INET;
128 server_addr.sin_port = 0;
129 if ((crp->client = clntudp_create (&server_addr, (u_long) prognum,
130 (u_long) versnum, timeout, &crp->socket)) == NULL)
131 return (int) get_rpc_createerr().cf_stat;
132 crp->valid = 1;
133 crp->oldprognum = prognum;
134 crp->oldversnum = versnum;
135 (void) strncpy (crp->oldhost, host, 255);
136 crp->oldhost[255] = '\0';
137 }
138 tottimeout.tv_sec = 25;
139 tottimeout.tv_usec = 0;
140 clnt_stat = clnt_call (crp->client, procnum, inproc, (char *) in,
141 outproc, out, tottimeout);
142 /*
143 * if call failed, empty cache
144 */
145 if (clnt_stat != RPC_SUCCESS)
146 crp->valid = 0;
147 return (int) clnt_stat;
148 }
149
150 #ifdef __UCLIBC_HAS_THREADS__
__rpc_thread_clnt_cleanup(void)151 void attribute_hidden __rpc_thread_clnt_cleanup (void)
152 {
153 struct callrpc_private_s *rcp = RPC_THREAD_VARIABLE(callrpc_private_s);
154
155 if (rcp) {
156 if (rcp->client)
157 CLNT_DESTROY (rcp->client);
158 free (rcp);
159 }
160 }
161 #endif /* __UCLIBC_HAS_THREADS__ */
162