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 /*
37 * clnt_simple.c
38 * Simplified front end to client rpc.
39 *
40 */
41
42 #include "namespace.h"
43 #include "reentrant.h"
44 #include <sys/param.h>
45 #include <stdio.h>
46 #include <errno.h>
47 #include <rpc/rpc.h>
48 #include <string.h>
49 #include <stdlib.h>
50 #include <fcntl.h>
51 #include <unistd.h>
52 #include "un-namespace.h"
53 #include "mt_misc.h"
54
55 #ifndef MAXHOSTNAMELEN
56 #define MAXHOSTNAMELEN 64
57 #endif
58
59 #ifndef NETIDLEN
60 #define NETIDLEN 32
61 #endif
62
63 struct rpc_call_private {
64 int valid; /* Is this entry valid ? */
65 CLIENT *client; /* Client handle */
66 pid_t pid; /* process-id at moment of creation */
67 rpcprog_t prognum; /* Program */
68 rpcvers_t versnum; /* Version */
69 char host[MAXHOSTNAMELEN]; /* Servers host */
70 char nettype[NETIDLEN]; /* Network type */
71 };
72 static struct rpc_call_private *rpc_call_private_main;
73 static thread_key_t rpc_call_key;
74 static once_t rpc_call_once = ONCE_INITIALIZER;
75 static int rpc_call_key_error;
76
77 static void rpc_call_key_init(void);
78 static void rpc_call_destroy(void *);
79
80 static void
rpc_call_destroy(void * vp)81 rpc_call_destroy(void *vp)
82 {
83 struct rpc_call_private *rcp = (struct rpc_call_private *)vp;
84
85 if (rcp) {
86 if (rcp->client)
87 CLNT_DESTROY(rcp->client);
88 free(rcp);
89 }
90 }
91
92 static void
rpc_call_key_init(void)93 rpc_call_key_init(void)
94 {
95
96 rpc_call_key_error = thr_keycreate(&rpc_call_key, rpc_call_destroy);
97 }
98
99 /*
100 * This is the simplified interface to the client rpc layer.
101 * The client handle is not destroyed here and is reused for
102 * the future calls to same prog, vers, host and nettype combination.
103 *
104 * The total time available is 25 seconds.
105 *
106 * host - host name
107 * prognum - program number
108 * versnum - version number
109 * procnum - procedure number
110 * inproc, outproc - in/out XDR procedures
111 * in, out - recv/send data
112 * nettype - nettype
113 */
114 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)115 rpc_call(const char *host, const rpcprog_t prognum, const rpcvers_t versnum,
116 const rpcproc_t procnum, const xdrproc_t inproc, const char *in,
117 const xdrproc_t outproc, char *out, const char *nettype)
118 {
119 struct rpc_call_private *rcp = (struct rpc_call_private *) 0;
120 enum clnt_stat clnt_stat;
121 struct timeval timeout, tottimeout;
122 int main_thread = 1;
123
124 if ((main_thread = thr_main())) {
125 rcp = rpc_call_private_main;
126 } else {
127 if (thr_once(&rpc_call_once, rpc_call_key_init) != 0 ||
128 rpc_call_key_error != 0) {
129 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
130 rpc_createerr.cf_error.re_errno = rpc_call_key_error;
131 return (rpc_createerr.cf_stat);
132 }
133 rcp = (struct rpc_call_private *)thr_getspecific(rpc_call_key);
134 }
135 if (rcp == NULL) {
136 rcp = malloc(sizeof (*rcp));
137 if (rcp == NULL) {
138 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
139 rpc_createerr.cf_error.re_errno = errno;
140 return (rpc_createerr.cf_stat);
141 }
142 if (main_thread)
143 rpc_call_private_main = rcp;
144 else
145 thr_setspecific(rpc_call_key, (void *) rcp);
146 rcp->valid = 0;
147 rcp->client = NULL;
148 }
149 if ((nettype == NULL) || (nettype[0] == 0))
150 nettype = "netpath";
151 if (!(rcp->valid && rcp->pid == getpid() &&
152 (rcp->prognum == prognum) &&
153 (rcp->versnum == versnum) &&
154 (!strcmp(rcp->host, host)) &&
155 (!strcmp(rcp->nettype, nettype)))) {
156 int fd;
157
158 rcp->valid = 0;
159 if (rcp->client)
160 CLNT_DESTROY(rcp->client);
161 /*
162 * Using the first successful transport for that type
163 */
164 rcp->client = clnt_create(host, prognum, versnum, nettype);
165 rcp->pid = getpid();
166 if (rcp->client == NULL) {
167 return (rpc_createerr.cf_stat);
168 }
169 /*
170 * Set time outs for connectionless case. Do it
171 * unconditionally. Faster than doing a t_getinfo()
172 * and then doing the right thing.
173 */
174 timeout.tv_usec = 0;
175 timeout.tv_sec = 5;
176 (void) CLNT_CONTROL(rcp->client,
177 CLSET_RETRY_TIMEOUT, (char *)(void *)&timeout);
178 if (CLNT_CONTROL(rcp->client, CLGET_FD, (char *)(void *)&fd))
179 _fcntl(fd, F_SETFD, 1); /* make it "close on exec" */
180 rcp->prognum = prognum;
181 rcp->versnum = versnum;
182 if ((strlen(host) < (size_t)MAXHOSTNAMELEN) &&
183 (strlen(nettype) < (size_t)NETIDLEN)) {
184 (void) strcpy(rcp->host, host);
185 (void) strcpy(rcp->nettype, nettype);
186 rcp->valid = 1;
187 } else {
188 rcp->valid = 0;
189 }
190 } /* else reuse old client */
191 tottimeout.tv_sec = 25;
192 tottimeout.tv_usec = 0;
193 /*LINTED const castaway*/
194 clnt_stat = CLNT_CALL(rcp->client, procnum, inproc, (char *) in,
195 outproc, out, tottimeout);
196 /*
197 * if call failed, empty cache
198 */
199 if (clnt_stat != RPC_SUCCESS)
200 rcp->valid = 0;
201 return (clnt_stat);
202 }
203