summaryrefslogtreecommitdiffstats
path: root/src/clnt_raw.c
blob: 03f839d707e81a16f861d34ef808f82b1665055d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
/*
 * Copyright (c) 2009, Sun Microsystems, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - Neither the name of Sun Microsystems, Inc. nor the names of its
 *   contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * clnt_raw.c
 *
 * Copyright (C) 1984, Sun Microsystems, Inc.
 *
 * Memory based rpc for simple testing and timing.
 * Interface to create an rpc client and server in the same process.
 * This lets us similate rpc and get round trip overhead, without
 * any interference from the kernel.
 */
#include <pthread.h>
#include <reentrant.h>
#include <assert.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>

#include <rpc/rpc.h>
#include <rpc/raw.h>

extern mutex_t clntraw_lock;

#define MCALL_MSG_SIZE 24

/*
 * This is the "network" we will be moving stuff over.
 */
static struct clntraw_private {
	CLIENT	client_object;
	XDR	xdr_stream;
	char	*_raw_buf;
	union {
	    struct rpc_msg	mashl_rpcmsg;
	    char 		mashl_callmsg[MCALL_MSG_SIZE];
	} u;
	u_int	mcnt;
} *clntraw_private;

static enum clnt_stat clnt_raw_call(CLIENT *, rpcproc_t, xdrproc_t, void *,
	xdrproc_t, void *, struct timeval);
static void clnt_raw_geterr(CLIENT *, struct rpc_err *);
static bool_t clnt_raw_freeres(CLIENT *, xdrproc_t, void *);
static void clnt_raw_abort(CLIENT *);
static bool_t clnt_raw_control(CLIENT *, u_int, void *);
static void clnt_raw_destroy(CLIENT *);
static struct clnt_ops *clnt_raw_ops(void);

/*
 * Create a client handle for memory based rpc.
 */
CLIENT *
clnt_raw_create(prog, vers)
	rpcprog_t prog;
	rpcvers_t vers;
{
	struct clntraw_private *clp;
	struct rpc_msg call_msg;
	XDR *xdrs;
	CLIENT	*client;

	mutex_lock(&clntraw_lock);
	clp = clntraw_private;
	if (clp == NULL) {
		clp = (struct clntraw_private *)calloc(1, sizeof (*clp));
		if (clp == NULL) {
			mutex_unlock(&clntraw_lock);
			return NULL;
		}
		if (__rpc_rawcombuf == NULL)
			__rpc_rawcombuf =
			    (char *)calloc(UDPMSGSIZE, sizeof (char));
		clp->_raw_buf = __rpc_rawcombuf;
		clntraw_private = clp;
	}
	xdrs = &clp->xdr_stream;
	client = &clp->client_object;
	/*
	 * pre-serialize the static part of the call msg and stash it away
	 */
	call_msg.rm_direction = CALL;
	call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
	/* XXX: prog and vers have been long historically :-( */
	call_msg.rm_call.cb_prog = (u_int32_t)prog;
	call_msg.rm_call.cb_vers = (u_int32_t)vers;
	xdrmem_create(xdrs, clp->u.mashl_callmsg, MCALL_MSG_SIZE, XDR_ENCODE); 
	if (! xdr_callhdr(xdrs, &call_msg))
		warnx("clntraw_create - Fatal header serialization error.");
	clp->mcnt = XDR_GETPOS(xdrs);
	XDR_DESTROY(xdrs);

	/*
	 * Set xdrmem for client/server shared buffer
	 */
	xdrmem_create(xdrs, clp->_raw_buf, UDPMSGSIZE, XDR_FREE);

	/*
	 * create client handle
	 */
	client->cl_ops = clnt_raw_ops();
	client->cl_auth = authnone_create();
	mutex_unlock(&clntraw_lock);
	return (client);
}

/* ARGSUSED */
static enum clnt_stat 
clnt_raw_call(h, proc, xargs, argsp, xresults, resultsp, timeout)
	CLIENT *h;
	rpcproc_t proc;
	xdrproc_t xargs;
	void *argsp;
	xdrproc_t xresults;
	void *resultsp;
	struct timeval timeout;
{
	struct clntraw_private *clp = clntraw_private;
	XDR *xdrs;
	struct rpc_msg msg;
	enum clnt_stat status;
	struct rpc_err error;

	assert(h != NULL);

	mutex_lock(&clntraw_lock);
	if (clp == NULL) {
		mutex_unlock(&clntraw_lock);
		return (RPC_FAILED);
	}
	xdrs = &clp->xdr_stream;
	mutex_unlock(&clntraw_lock);

call_again:
	/*
	 * send request
	 */
	xdrs->x_op = XDR_ENCODE;
	XDR_SETPOS(xdrs, 0);
	clp->u.mashl_rpcmsg.rm_xid ++ ;
	if ((! XDR_PUTBYTES(xdrs, clp->u.mashl_callmsg, clp->mcnt)) ||
	    (! XDR_PUTINT32(xdrs, (int32_t *)&proc)) ||
	    (! AUTH_MARSHALL(h->cl_auth, xdrs)) ||
	    (! (*xargs)(xdrs, argsp))) {
		return (RPC_CANTENCODEARGS);
	}
	(void)XDR_GETPOS(xdrs);  /* called just to cause overhead */

	/*
	 * We have to call server input routine here because this is
	 * all going on in one process. Yuk.
	 */
	svc_getreq_common(FD_SETSIZE);

	/*
	 * get results
	 */
	xdrs->x_op = XDR_DECODE;
	XDR_SETPOS(xdrs, 0);
	msg.acpted_rply.ar_verf = _null_auth;
	msg.acpted_rply.ar_results.where = resultsp;
	msg.acpted_rply.ar_results.proc = xresults;
	if (! xdr_replymsg(xdrs, &msg)) {
		/*
		 * It's possible for xdr_replymsg() to fail partway
		 * through its attempt to decode the result from the
		 * server. If this happens, it will leave the reply
		 * structure partially populated with dynamically
		 * allocated memory. (This can happen if someone uses
		 * clntudp_bufcreate() to create a CLIENT handle and
		 * specifies a receive buffer size that is too small.)
		 * This memory must be free()ed to avoid a leak.
		 */
		int op = xdrs->x_op;
		xdrs->x_op = XDR_FREE;
		xdr_replymsg(xdrs, &msg);
		xdrs->x_op = op;
		return (RPC_CANTDECODERES);
	}
	_seterr_reply(&msg, &error);
	status = error.re_status;

	if (status == RPC_SUCCESS) {
		if (! AUTH_VALIDATE(h->cl_auth, &msg.acpted_rply.ar_verf)) {
			status = RPC_AUTHERROR;
		}
	}  /* end successful completion */
	else {
		if (AUTH_REFRESH(h->cl_auth, &msg))
			goto call_again;
	}  /* end of unsuccessful completion */

	if (status == RPC_SUCCESS) {
		if (! AUTH_VALIDATE(h->cl_auth, &msg.acpted_rply.ar_verf)) {
			status = RPC_AUTHERROR;
		}
		if (msg.acpted_rply.ar_verf.oa_base != NULL) {
			xdrs->x_op = XDR_FREE;
			(void)xdr_opaque_auth(xdrs, &(msg.acpted_rply.ar_verf));
		}
	}

	return (status);
}

/*ARGSUSED*/
static void
clnt_raw_geterr(cl, err)
	CLIENT *cl;
	struct rpc_err *err;
{
}


/* ARGSUSED */
static bool_t
clnt_raw_freeres(cl, xdr_res, res_ptr)
	CLIENT *cl;
	xdrproc_t xdr_res;
	void *res_ptr;
{
	struct clntraw_private *clp = clntraw_private;
	XDR *xdrs;
	bool_t rval;

	mutex_lock(&clntraw_lock);
	if (clp == NULL) {
		rval = (bool_t) RPC_FAILED;
		mutex_unlock(&clntraw_lock);
		return (rval);
	}
	xdrs = &clp->xdr_stream;
	mutex_unlock(&clntraw_lock);
	xdrs->x_op = XDR_FREE;
	return ((*xdr_res)(xdrs, res_ptr));
}

/*ARGSUSED*/
static void
clnt_raw_abort(cl)
	CLIENT *cl;
{
}

/*ARGSUSED*/
static bool_t
clnt_raw_control(cl, ui, str)
	CLIENT *cl;
	u_int ui;
	void *str;
{
	return (FALSE);
}

/*ARGSUSED*/
static void
clnt_raw_destroy(cl)
	CLIENT *cl;
{
}

static struct clnt_ops *
clnt_raw_ops()
{
	static struct clnt_ops ops;
	extern mutex_t  ops_lock;

	/* VARIABLES PROTECTED BY ops_lock: ops */

	mutex_lock(&ops_lock);
	if (ops.cl_call == NULL) {
		ops.cl_call = clnt_raw_call;
		ops.cl_abort = clnt_raw_abort;
		ops.cl_geterr = clnt_raw_geterr;
		ops.cl_freeres = clnt_raw_freeres;
		ops.cl_destroy = clnt_raw_destroy;
		ops.cl_control = clnt_raw_control;
	}
	mutex_unlock(&ops_lock);
	return (&ops);
}