1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29 /*
30 * Portions of this source code were derived from Berkeley
31 * 4.3 BSD under license from the Regents of the University of
32 * California.
33 */
34
35 /*
36 * Simplified front end to client rpc.
37 */
38
39 #include "mt.h"
40 #include "rpc_mt.h"
41 #include <stdio.h>
42 #include <errno.h>
43 #include <rpc/rpc.h>
44 #include <string.h>
45 #include <sys/param.h>
46 #include <stdlib.h>
47 #include <unistd.h>
48
49 #ifndef MAXHOSTNAMELEN
50 #define MAXHOSTNAMELEN 64
51 #endif
52
53 #ifndef NETIDLEN
54 #define NETIDLEN 32
55 #endif
56
57 struct rpc_call_private {
58 int valid; /* Is this entry valid ? */
59 CLIENT *client; /* Client handle */
60 pid_t pid; /* process-id at moment of creation */
61 rpcprog_t prognum; /* Program */
62 rpcvers_t versnum; /* version */
63 char host[MAXHOSTNAMELEN]; /* Servers host */
64 char nettype[NETIDLEN]; /* Network type */
65 };
66
67 static void
rpc_call_destroy(void * vp)68 rpc_call_destroy(void *vp)
69 {
70 struct rpc_call_private *rcp = (struct rpc_call_private *)vp;
71
72 if (rcp) {
73 if (rcp->client)
74 CLNT_DESTROY(rcp->client);
75 free(rcp);
76 }
77 }
78
79 /*
80 * This is the simplified interface to the client rpc layer.
81 * The client handle is not destroyed here and is reused for
82 * the future calls to same prog, vers, host and nettype combination.
83 *
84 * The total time available is 25 seconds.
85 */
86 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 * netclass)87 rpc_call(const char *host, const rpcprog_t prognum, const rpcvers_t versnum,
88 const rpcproc_t procnum, const xdrproc_t inproc, const char *in,
89 const xdrproc_t outproc, char *out, const char *netclass)
90 {
91 struct rpc_call_private *rcp;
92 enum clnt_stat clnt_stat;
93 struct timeval timeout, tottimeout;
94 static pthread_key_t rpc_call_key = PTHREAD_ONCE_KEY_NP;
95 char nettype_array[NETIDLEN];
96 char *nettype = &nettype_array[0];
97
98 if (netclass == NULL)
99 nettype = NULL;
100 else {
101 size_t len = strlen(netclass);
102 if (len >= sizeof (nettype_array)) {
103 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
104 return (rpc_createerr.cf_stat);
105 }
106 (void) strcpy(nettype, netclass);
107 }
108
109 rcp = thr_get_storage(&rpc_call_key, sizeof (*rcp), rpc_call_destroy);
110 if (rcp == NULL) {
111 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
112 rpc_createerr.cf_error.re_errno = errno;
113 return (rpc_createerr.cf_stat);
114 }
115
116 if ((nettype == NULL) || (nettype[0] == '\0'))
117 nettype = "netpath";
118 if (!(rcp->valid &&
119 rcp->pid == getpid() &&
120 rcp->prognum == prognum &&
121 rcp->versnum == versnum &&
122 strcmp(rcp->host, host) == 0 &&
123 strcmp(rcp->nettype, nettype) == 0)) {
124 int fd;
125
126 rcp->valid = 0;
127 if (rcp->client)
128 CLNT_DESTROY(rcp->client);
129 /*
130 * Using the first successful transport for that type
131 */
132 rcp->client = clnt_create(host, prognum, versnum, nettype);
133 rcp->pid = getpid();
134 if (rcp->client == NULL)
135 return (rpc_createerr.cf_stat);
136 /*
137 * Set time outs for connectionless case. Do it
138 * unconditionally. Faster than doing a t_getinfo()
139 * and then doing the right thing.
140 */
141 timeout.tv_usec = 0;
142 timeout.tv_sec = 5;
143 (void) CLNT_CONTROL(rcp->client,
144 CLSET_RETRY_TIMEOUT, (char *)&timeout);
145 if (CLNT_CONTROL(rcp->client, CLGET_FD, (char *)&fd))
146 (void) fcntl(fd, F_SETFD, 1); /* close on exec */
147 rcp->prognum = prognum;
148 rcp->versnum = versnum;
149 if ((strlen(host) < (size_t)MAXHOSTNAMELEN) &&
150 (strlen(nettype) < (size_t)NETIDLEN)) {
151 (void) strcpy(rcp->host, host);
152 (void) strcpy(rcp->nettype, nettype);
153 rcp->valid = 1;
154 } else {
155 rcp->valid = 0;
156 }
157 } /* else reuse old client */
158 tottimeout.tv_sec = 25;
159 tottimeout.tv_usec = 0;
160 clnt_stat = CLNT_CALL(rcp->client, procnum, inproc, (char *)in,
161 outproc, out, tottimeout);
162 /*
163 * if call failed, empty cache
164 */
165 if (clnt_stat != RPC_SUCCESS)
166 rcp->valid = 0;
167 return (clnt_stat);
168 }
169