3 * Simplified front end to rpc.
5 * Copyright (C) 1984, Sun Microsystems, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above
14 * copyright notice, this list of conditions and the following
15 * disclaimer in the documentation and/or other materials
16 * provided with the distribution.
17 * * Neither the name of Sun Microsystems, Inc. nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
26 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
28 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
31 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40 #include <sys/socket.h>
44 struct callrpc_private_s
48 u_long oldprognum, oldversnum, valid;
51 #ifdef _RPC_THREAD_SAFE_
52 #define callrpc_private RPC_THREAD_VARIABLE(callrpc_private_s)
54 static struct callrpc_private_s *callrpc_private;
58 callrpc (const char *host, u_long prognum, u_long versnum, u_long procnum,
59 xdrproc_t inproc, const char *in, xdrproc_t outproc, char *out)
61 struct callrpc_private_s *crp = callrpc_private;
62 struct sockaddr_in server_addr;
63 enum clnt_stat clnt_stat;
64 struct hostent hostbuf, *hp;
65 struct timeval timeout, tottimeout;
69 crp = (struct callrpc_private_s *) calloc (1, sizeof (*crp));
72 callrpc_private = crp;
74 if (crp->oldhost == NULL)
76 crp->oldhost = malloc (256);
78 crp->socket = RPC_ANYSOCK;
80 if (crp->valid && crp->oldprognum == prognum && crp->oldversnum == versnum
81 && strcmp (crp->oldhost, host) == 0)
83 /* reuse old client */
92 if (crp->socket != RPC_ANYSOCK)
94 (void) __close (crp->socket);
95 crp->socket = RPC_ANYSOCK;
99 clnt_destroy (crp->client);
104 buffer = __alloca (buflen);
105 while (__gethostbyname_r (host, &hostbuf, buffer, buflen,
108 if (herr != NETDB_INTERNAL || errno != ERANGE)
109 return (int) RPC_UNKNOWNHOST;
112 /* Enlarge the buffer. */
114 buffer = __alloca (buflen);
119 memcpy ((char *) &server_addr.sin_addr, hp->h_addr, hp->h_length);
120 server_addr.sin_family = AF_INET;
121 server_addr.sin_port = 0;
122 if ((crp->client = INTUSE(clntudp_create) (&server_addr, (u_long) prognum,
123 (u_long) versnum, timeout, &crp->socket)) == NULL)
124 return (int) get_rpc_createerr().cf_stat;
126 crp->oldprognum = prognum;
127 crp->oldversnum = versnum;
128 (void) strncpy (crp->oldhost, host, 255);
129 crp->oldhost[255] = '\0';
131 tottimeout.tv_sec = 25;
132 tottimeout.tv_usec = 0;
133 clnt_stat = clnt_call (crp->client, procnum, inproc, (char *) in,
134 outproc, out, tottimeout);
136 * if call failed, empty cache
138 if (clnt_stat != RPC_SUCCESS)
140 return (int) clnt_stat;
143 #ifdef _RPC_THREAD_SAFE_
145 __rpc_thread_clnt_cleanup (void)
147 struct callrpc_private_s *rcp = RPC_THREAD_VARIABLE(callrpc_private_s);
151 CLNT_DESTROY (rcp->client);
155 #endif /* _RPC_THREAD_SAFE_ */