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[glibc/history.git] / sunrpc / clnt_simp.c
blob631ec8afbce6b6c9400e9fa8b95479b0cb42b7d9
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.
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.
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.
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.
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.
26 * Sun Microsystems, Inc.
27 * 2550 Garcia Avenue
28 * Mountain View, California 94043
30 #if !defined(lint) && defined(SCCSIDS)
31 static char sccsid[] = "@(#)clnt_simple.c 1.35 87/08/11 Copyr 1984 Sun Micro";
32 #endif
35 * clnt_simple.c
36 * Simplified front end to rpc.
38 * Copyright (C) 1984, Sun Microsystems, Inc.
41 #include <alloca.h>
42 #include <errno.h>
43 #include <stdio.h>
44 #include <unistd.h>
45 #include <rpc/rpc.h>
46 #include <sys/socket.h>
47 #include <netdb.h>
48 #include <string.h>
50 struct callrpc_private_s
52 CLIENT *client;
53 int socket;
54 u_long oldprognum, oldversnum, valid;
55 char *oldhost;
57 #ifdef _RPC_THREAD_SAFE_
58 #define callrpc_private RPC_THREAD_VARIABLE(callrpc_private_s)
59 #else
60 static struct callrpc_private_s *callrpc_private;
61 #endif
63 int
64 callrpc (const char *host, u_long prognum, u_long versnum, u_long procnum,
65 xdrproc_t inproc, const char *in, xdrproc_t outproc, char *out)
67 struct callrpc_private_s *crp = callrpc_private;
68 struct sockaddr_in server_addr;
69 enum clnt_stat clnt_stat;
70 struct hostent hostbuf, *hp;
71 struct timeval timeout, tottimeout;
73 if (crp == 0)
75 crp = (struct callrpc_private_s *) calloc (1, sizeof (*crp));
76 if (crp == 0)
77 return 0;
78 callrpc_private = crp;
80 if (crp->oldhost == NULL)
82 crp->oldhost = malloc (256);
83 crp->oldhost[0] = 0;
84 crp->socket = RPC_ANYSOCK;
86 if (crp->valid && crp->oldprognum == prognum && crp->oldversnum == versnum
87 && strcmp (crp->oldhost, host) == 0)
89 /* reuse old client */
91 else
93 size_t buflen;
94 char *buffer;
95 int herr;
97 crp->valid = 0;
98 if (crp->socket != RPC_ANYSOCK)
100 (void) __close (crp->socket);
101 crp->socket = RPC_ANYSOCK;
103 if (crp->client)
105 clnt_destroy (crp->client);
106 crp->client = NULL;
109 buflen = 1024;
110 buffer = __alloca (buflen);
111 while (__gethostbyname_r (host, &hostbuf, buffer, buflen,
112 &hp, &herr) != 0
113 || hp == NULL)
114 if (herr != NETDB_INTERNAL || errno != ERANGE)
115 return (int) RPC_UNKNOWNHOST;
116 else
118 /* Enlarge the buffer. */
119 buflen *= 2;
120 buffer = __alloca (buflen);
123 timeout.tv_usec = 0;
124 timeout.tv_sec = 5;
125 memcpy ((char *) &server_addr.sin_addr, hp->h_addr, hp->h_length);
126 server_addr.sin_family = AF_INET;
127 server_addr.sin_port = 0;
128 if ((crp->client = INTUSE(clntudp_create) (&server_addr, (u_long) prognum,
129 (u_long) versnum, timeout, &crp->socket)) == NULL)
130 return (int) get_rpc_createerr().cf_stat;
131 crp->valid = 1;
132 crp->oldprognum = prognum;
133 crp->oldversnum = versnum;
134 (void) strncpy (crp->oldhost, host, 255);
135 crp->oldhost[255] = '\0';
137 tottimeout.tv_sec = 25;
138 tottimeout.tv_usec = 0;
139 clnt_stat = clnt_call (crp->client, procnum, inproc, (char *) in,
140 outproc, out, tottimeout);
142 * if call failed, empty cache
144 if (clnt_stat != RPC_SUCCESS)
145 crp->valid = 0;
146 return (int) clnt_stat;
149 #ifdef _RPC_THREAD_SAFE_
150 void
151 __rpc_thread_clnt_cleanup (void)
153 struct callrpc_private_s *rcp = RPC_THREAD_VARIABLE(callrpc_private_s);
155 if (rcp) {
156 if (rcp->client)
157 CLNT_DESTROY (rcp->client);
158 free (rcp);
161 #endif /* _RPC_THREAD_SAFE_ */