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 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD$");
42
43 /*
44 * clnt_simple.c
45 * Simplified front end to client rpc.
46 *
47 */
48
49 #include "namespace.h"
50 #include "reentrant.h"
51 #include <sys/param.h>
52 #include <stdio.h>
53 #include <errno.h>
54 #include <rpc/rpc.h>
55 #include <string.h>
56 #include <stdlib.h>
57 #include <fcntl.h>
58 #include <unistd.h>
59 #include "un-namespace.h"
60 #include "mt_misc.h"
61
62 #ifndef MAXHOSTNAMELEN
63 #define MAXHOSTNAMELEN 64
64 #endif
65
66 #ifndef NETIDLEN
67 #define NETIDLEN 32
68 #endif
69
70 struct rpc_call_private {
71 int valid; /* Is this entry valid ? */
72 CLIENT *client; /* Client handle */
73 pid_t pid; /* process-id at moment of creation */
74 rpcprog_t prognum; /* Program */
75 rpcvers_t versnum; /* Version */
76 char host[MAXHOSTNAMELEN]; /* Servers host */
77 char nettype[NETIDLEN]; /* Network type */
78 };
79 static struct rpc_call_private *rpc_call_private_main;
80 static thread_key_t rpc_call_key;
81 static once_t rpc_call_once = ONCE_INITIALIZER;
82 static int rpc_call_key_error;
83
84 static void rpc_call_key_init(void);
85 static void rpc_call_destroy(void *);
86
87 static void
rpc_call_destroy(void * vp)88 rpc_call_destroy(void *vp)
89 {
90 struct rpc_call_private *rcp = (struct rpc_call_private *)vp;
91
92 if (rcp) {
93 if (rcp->client)
94 CLNT_DESTROY(rcp->client);
95 free(rcp);
96 }
97 }
98
99 static void
rpc_call_key_init(void)100 rpc_call_key_init(void)
101 {
102
103 rpc_call_key_error = thr_keycreate(&rpc_call_key, rpc_call_destroy);
104 }
105
106 /*
107 * This is the simplified interface to the client rpc layer.
108 * The client handle is not destroyed here and is reused for
109 * the future calls to same prog, vers, host and nettype combination.
110 *
111 * The total time available is 25 seconds.
112 *
113 * host - host name
114 * prognum - program number
115 * versnum - version number
116 * procnum - procedure number
117 * inproc, outproc - in/out XDR procedures
118 * in, out - recv/send data
119 * nettype - nettype
120 */
121 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)122 rpc_call(const char *host, const rpcprog_t prognum, const rpcvers_t versnum,
123 const rpcproc_t procnum, const xdrproc_t inproc, const char *in,
124 const xdrproc_t outproc, char *out, const char *nettype)
125 {
126 struct rpc_call_private *rcp = (struct rpc_call_private *) 0;
127 enum clnt_stat clnt_stat;
128 struct timeval timeout, tottimeout;
129 int main_thread = 1;
130
131 if ((main_thread = thr_main())) {
132 rcp = rpc_call_private_main;
133 } else {
134 if (thr_once(&rpc_call_once, rpc_call_key_init) != 0 ||
135 rpc_call_key_error != 0) {
136 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
137 rpc_createerr.cf_error.re_errno = rpc_call_key_error;
138 return (rpc_createerr.cf_stat);
139 }
140 rcp = (struct rpc_call_private *)thr_getspecific(rpc_call_key);
141 }
142 if (rcp == NULL) {
143 rcp = malloc(sizeof (*rcp));
144 if (rcp == NULL) {
145 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
146 rpc_createerr.cf_error.re_errno = errno;
147 return (rpc_createerr.cf_stat);
148 }
149 if (main_thread)
150 rpc_call_private_main = rcp;
151 else
152 thr_setspecific(rpc_call_key, (void *) rcp);
153 rcp->valid = 0;
154 rcp->client = NULL;
155 }
156 if ((nettype == NULL) || (nettype[0] == 0))
157 nettype = "netpath";
158 if (!(rcp->valid && rcp->pid == getpid() &&
159 (rcp->prognum == prognum) &&
160 (rcp->versnum == versnum) &&
161 (!strcmp(rcp->host, host)) &&
162 (!strcmp(rcp->nettype, nettype)))) {
163 int fd;
164
165 rcp->valid = 0;
166 if (rcp->client)
167 CLNT_DESTROY(rcp->client);
168 /*
169 * Using the first successful transport for that type
170 */
171 rcp->client = clnt_create(host, prognum, versnum, nettype);
172 rcp->pid = getpid();
173 if (rcp->client == NULL) {
174 return (rpc_createerr.cf_stat);
175 }
176 /*
177 * Set time outs for connectionless case. Do it
178 * unconditionally. Faster than doing a t_getinfo()
179 * and then doing the right thing.
180 */
181 timeout.tv_usec = 0;
182 timeout.tv_sec = 5;
183 (void) CLNT_CONTROL(rcp->client,
184 CLSET_RETRY_TIMEOUT, (char *)(void *)&timeout);
185 if (CLNT_CONTROL(rcp->client, CLGET_FD, (char *)(void *)&fd))
186 _fcntl(fd, F_SETFD, 1); /* make it "close on exec" */
187 rcp->prognum = prognum;
188 rcp->versnum = versnum;
189 if ((strlen(host) < (size_t)MAXHOSTNAMELEN) &&
190 (strlen(nettype) < (size_t)NETIDLEN)) {
191 (void) strcpy(rcp->host, host);
192 (void) strcpy(rcp->nettype, nettype);
193 rcp->valid = 1;
194 } else {
195 rcp->valid = 0;
196 }
197 } /* else reuse old client */
198 tottimeout.tv_sec = 25;
199 tottimeout.tv_usec = 0;
200 /*LINTED const castaway*/
201 clnt_stat = CLNT_CALL(rcp->client, procnum, inproc, (char *) in,
202 outproc, out, tottimeout);
203 /*
204 * if call failed, empty cache
205 */
206 if (clnt_stat != RPC_SUCCESS)
207 rcp->valid = 0;
208 return (clnt_stat);
209 }
210