1 /* $NetBSD: clnt_simple.c,v 1.21 2000/07/06 03:10:34 christos Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-3-Clause
5 *
6 * Copyright (c) 2009, Sun Microsystems, Inc.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are met:
11 * - Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
13 * - Redistributions in binary form must reproduce the above copyright notice,
14 * this list of conditions and the following disclaimer in the documentation
15 * and/or other materials provided with the distribution.
16 * - Neither the name of Sun Microsystems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32 /*
33 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
34 */
35
36 #if defined(LIBC_SCCS) && !defined(lint)
37 static char *sccsid2 = "from: @(#)clnt_simple.c 1.35 87/08/11 Copyr 1984 Sun Micro";
38 static char *sccsid = "from: @(#)clnt_simple.c 2.2 88/08/01 4.0 RPCSRC";
39 #endif
40 /*
41 * clnt_simple.c
42 * Simplified front end to client rpc.
43 *
44 */
45
46 #include "namespace.h"
47 #include "reentrant.h"
48 #include <sys/param.h>
49 #include <stdio.h>
50 #include <errno.h>
51 #include <rpc/rpc.h>
52 #include <string.h>
53 #include <stdlib.h>
54 #include <fcntl.h>
55 #include <unistd.h>
56 #include "un-namespace.h"
57 #include "mt_misc.h"
58
59 #ifndef MAXHOSTNAMELEN
60 #define MAXHOSTNAMELEN 64
61 #endif
62
63 #ifndef NETIDLEN
64 #define NETIDLEN 32
65 #endif
66
67 struct rpc_call_private {
68 int valid; /* Is this entry valid ? */
69 CLIENT *client; /* Client handle */
70 pid_t pid; /* process-id at moment of creation */
71 rpcprog_t prognum; /* Program */
72 rpcvers_t versnum; /* Version */
73 char host[MAXHOSTNAMELEN]; /* Servers host */
74 char nettype[NETIDLEN]; /* Network type */
75 };
76 static struct rpc_call_private *rpc_call_private_main;
77 static thread_key_t rpc_call_key;
78 static once_t rpc_call_once = ONCE_INITIALIZER;
79 static int rpc_call_key_error;
80
81 static void rpc_call_key_init(void);
82 static void rpc_call_destroy(void *);
83
84 static void
rpc_call_destroy(void * vp)85 rpc_call_destroy(void *vp)
86 {
87 struct rpc_call_private *rcp = (struct rpc_call_private *)vp;
88
89 if (rcp) {
90 if (rcp->client)
91 CLNT_DESTROY(rcp->client);
92 free(rcp);
93 }
94 }
95
96 static void
rpc_call_key_init(void)97 rpc_call_key_init(void)
98 {
99
100 rpc_call_key_error = thr_keycreate(&rpc_call_key, rpc_call_destroy);
101 }
102
103 /*
104 * This is the simplified interface to the client rpc layer.
105 * The client handle is not destroyed here and is reused for
106 * the future calls to same prog, vers, host and nettype combination.
107 *
108 * The total time available is 25 seconds.
109 *
110 * host - host name
111 * prognum - program number
112 * versnum - version number
113 * procnum - procedure number
114 * inproc, outproc - in/out XDR procedures
115 * in, out - recv/send data
116 * nettype - nettype
117 */
118 enum clnt_stat
rpc_call(const char * host,const rpcprog_t prognum,const rpcvers_t versnum,const rpcproc_t procnum,const xdrproc_t inproc,const char * in,const xdrproc_t outproc,char * out,const char * nettype)119 rpc_call(const char *host, const rpcprog_t prognum, const rpcvers_t versnum,
120 const rpcproc_t procnum, const xdrproc_t inproc, const char *in,
121 const xdrproc_t outproc, char *out, const char *nettype)
122 {
123 struct rpc_call_private *rcp = (struct rpc_call_private *) 0;
124 enum clnt_stat clnt_stat;
125 struct timeval timeout, tottimeout;
126 int main_thread = 1;
127
128 if ((main_thread = thr_main())) {
129 rcp = rpc_call_private_main;
130 } else {
131 if (thr_once(&rpc_call_once, rpc_call_key_init) != 0 ||
132 rpc_call_key_error != 0) {
133 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
134 rpc_createerr.cf_error.re_errno = rpc_call_key_error;
135 return (rpc_createerr.cf_stat);
136 }
137 rcp = (struct rpc_call_private *)thr_getspecific(rpc_call_key);
138 }
139 if (rcp == NULL) {
140 rcp = malloc(sizeof (*rcp));
141 if (rcp == NULL) {
142 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
143 rpc_createerr.cf_error.re_errno = errno;
144 return (rpc_createerr.cf_stat);
145 }
146 if (main_thread)
147 rpc_call_private_main = rcp;
148 else
149 thr_setspecific(rpc_call_key, (void *) rcp);
150 rcp->valid = 0;
151 rcp->client = NULL;
152 }
153 if ((nettype == NULL) || (nettype[0] == 0))
154 nettype = "netpath";
155 if (!(rcp->valid && rcp->pid == getpid() &&
156 (rcp->prognum == prognum) &&
157 (rcp->versnum == versnum) &&
158 (!strcmp(rcp->host, host)) &&
159 (!strcmp(rcp->nettype, nettype)))) {
160 int fd;
161
162 rcp->valid = 0;
163 if (rcp->client)
164 CLNT_DESTROY(rcp->client);
165 /*
166 * Using the first successful transport for that type
167 */
168 rcp->client = clnt_create(host, prognum, versnum, nettype);
169 rcp->pid = getpid();
170 if (rcp->client == NULL) {
171 return (rpc_createerr.cf_stat);
172 }
173 /*
174 * Set time outs for connectionless case. Do it
175 * unconditionally. Faster than doing a t_getinfo()
176 * and then doing the right thing.
177 */
178 timeout.tv_usec = 0;
179 timeout.tv_sec = 5;
180 (void) CLNT_CONTROL(rcp->client,
181 CLSET_RETRY_TIMEOUT, (char *)(void *)&timeout);
182 if (CLNT_CONTROL(rcp->client, CLGET_FD, (char *)(void *)&fd))
183 _fcntl(fd, F_SETFD, 1); /* make it "close on exec" */
184 rcp->prognum = prognum;
185 rcp->versnum = versnum;
186 if ((strlen(host) < (size_t)MAXHOSTNAMELEN) &&
187 (strlen(nettype) < (size_t)NETIDLEN)) {
188 (void) strcpy(rcp->host, host);
189 (void) strcpy(rcp->nettype, nettype);
190 rcp->valid = 1;
191 } else {
192 rcp->valid = 0;
193 }
194 } /* else reuse old client */
195 tottimeout.tv_sec = 25;
196 tottimeout.tv_usec = 0;
197 /*LINTED const castaway*/
198 clnt_stat = CLNT_CALL(rcp->client, procnum, inproc, (char *) in,
199 outproc, out, tottimeout);
200 /*
201 * if call failed, empty cache
202 */
203 if (clnt_stat != RPC_SUCCESS)
204 rcp->valid = 0;
205 return (clnt_stat);
206 }
207