1/*	$NetBSD: rpc_soc.c,v 1.6 2000/07/06 03:10:35 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/* #ident	"@(#)rpc_soc.c	1.17	94/04/24 SMI" */
34
35/*
36 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
37 * In addition, portions of such source code were derived from Berkeley
38 * 4.3 BSD under license from the Regents of the University of
39 * California.
40 */
41
42#if defined(LIBC_SCCS) && !defined(lint)
43static char sccsid[] = "@(#)rpc_soc.c 1.41 89/05/02 Copyr 1988 Sun Micro";
44#endif
45#include <sys/cdefs.h>
46__FBSDID("$FreeBSD$");
47
48#ifdef PORTMAP
49/*
50 * rpc_soc.c
51 *
52 * The backward compatibility routines for the earlier implementation
53 * of RPC, where the only transports supported were tcp/ip and udp/ip.
54 * Based on berkeley socket abstraction, now implemented on the top
55 * of TLI/Streams
56 */
57
58#include "namespace.h"
59#include "reentrant.h"
60#include <sys/types.h>
61#include <sys/socket.h>
62#include <stdio.h>
63#include <rpc/rpc.h>
64#include <rpc/pmap_clnt.h>
65#include <rpc/pmap_prot.h>
66#include <rpc/nettype.h>
67#include <syslog.h>
68#include <netinet/in.h>
69#include <netdb.h>
70#include <errno.h>
71#include <syslog.h>
72#include <stdlib.h>
73#include <string.h>
74#include <unistd.h>
75#include "un-namespace.h"
76
77#include "rpc_com.h"
78#include "mt_misc.h"
79
80static CLIENT *clnt_com_create(struct sockaddr_in *, rpcprog_t, rpcvers_t,
81    int *, u_int, u_int, char *);
82static SVCXPRT *svc_com_create(int, u_int, u_int, char *);
83static bool_t rpc_wrap_bcast(char *, struct netbuf *, struct netconfig *);
84
85/* XXX */
86#define IN4_LOCALHOST_STRING    "127.0.0.1"
87#define IN6_LOCALHOST_STRING    "::1"
88
89/*
90 * A common clnt create routine
91 */
92static CLIENT *
93clnt_com_create(struct sockaddr_in *raddr, rpcprog_t prog, rpcvers_t vers, int *sockp,
94    u_int sendsz, u_int recvsz, char *tp)
95{
96	CLIENT *cl;
97	int madefd = FALSE;
98	int fd = *sockp;
99	struct netconfig *nconf;
100	struct netbuf bindaddr;
101
102	mutex_lock(&rpcsoc_lock);
103	if ((nconf = __rpc_getconfip(tp)) == NULL) {
104		rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
105		mutex_unlock(&rpcsoc_lock);
106		return (NULL);
107	}
108	if (fd == RPC_ANYSOCK) {
109		fd = __rpc_nconf2fd(nconf);
110		if (fd == -1)
111			goto syserror;
112		madefd = TRUE;
113	}
114
115	if (raddr->sin_port == 0) {
116		u_int proto;
117		u_short sport;
118
119		mutex_unlock(&rpcsoc_lock);	/* pmap_getport is recursive */
120		proto = strcmp(tp, "udp") == 0 ? IPPROTO_UDP : IPPROTO_TCP;
121		sport = pmap_getport(raddr, (u_long)prog, (u_long)vers,
122		    proto);
123		if (sport == 0) {
124			goto err;
125		}
126		raddr->sin_port = htons(sport);
127		mutex_lock(&rpcsoc_lock);	/* pmap_getport is recursive */
128	}
129
130	/* Transform sockaddr_in to netbuf */
131	bindaddr.maxlen = bindaddr.len =  sizeof (struct sockaddr_in);
132	bindaddr.buf = raddr;
133
134	bindresvport(fd, NULL);
135	cl = clnt_tli_create(fd, nconf, &bindaddr, prog, vers,
136				sendsz, recvsz);
137	if (cl) {
138		if (madefd == TRUE) {
139			/*
140			 * The fd should be closed while destroying the handle.
141			 */
142			(void) CLNT_CONTROL(cl, CLSET_FD_CLOSE, NULL);
143			*sockp = fd;
144		}
145		(void) freenetconfigent(nconf);
146		mutex_unlock(&rpcsoc_lock);
147		return (cl);
148	}
149	goto err;
150
151syserror:
152	rpc_createerr.cf_stat = RPC_SYSTEMERROR;
153	rpc_createerr.cf_error.re_errno = errno;
154
155err:	if (madefd == TRUE)
156		(void)_close(fd);
157	(void) freenetconfigent(nconf);
158	mutex_unlock(&rpcsoc_lock);
159	return (NULL);
160}
161
162CLIENT *
163clntudp_bufcreate(struct sockaddr_in *raddr, u_long prog, u_long vers,
164    struct timeval wait, int *sockp, u_int sendsz, u_int recvsz)
165{
166	CLIENT *cl;
167
168	cl = clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp,
169	    sendsz, recvsz, "udp");
170	if (cl == NULL) {
171		return (NULL);
172	}
173	(void) CLNT_CONTROL(cl, CLSET_RETRY_TIMEOUT, &wait);
174	return (cl);
175}
176
177CLIENT *
178clntudp_create(struct sockaddr_in *raddr, u_long program, u_long version,
179    struct timeval wait, int *sockp)
180{
181
182	return clntudp_bufcreate(raddr, program, version, wait, sockp,
183					UDPMSGSIZE, UDPMSGSIZE);
184}
185
186CLIENT *
187clnttcp_create(struct sockaddr_in *raddr, u_long prog, u_long vers, int *sockp,
188    u_int sendsz, u_int recvsz)
189{
190
191	return clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp,
192	    sendsz, recvsz, "tcp");
193}
194
195CLIENT *
196clntraw_create(u_long prog, u_long vers)
197{
198
199	return clnt_raw_create((rpcprog_t)prog, (rpcvers_t)vers);
200}
201
202/*
203 * A common server create routine
204 */
205static SVCXPRT *
206svc_com_create(int fd, u_int sendsize, u_int recvsize, char *netid)
207{
208	struct netconfig *nconf;
209	SVCXPRT *svc;
210	int madefd = FALSE;
211	int port;
212	struct sockaddr_in sin;
213
214	if ((nconf = __rpc_getconfip(netid)) == NULL) {
215		(void) syslog(LOG_ERR, "Could not get %s transport", netid);
216		return (NULL);
217	}
218	if (fd == RPC_ANYSOCK) {
219		fd = __rpc_nconf2fd(nconf);
220		if (fd == -1) {
221			(void) freenetconfigent(nconf);
222			(void) syslog(LOG_ERR,
223			"svc%s_create: could not open connection", netid);
224			return (NULL);
225		}
226		madefd = TRUE;
227	}
228
229	memset(&sin, 0, sizeof sin);
230	sin.sin_family = AF_INET;
231	bindresvport(fd, &sin);
232	_listen(fd, SOMAXCONN);
233	svc = svc_tli_create(fd, nconf, NULL, sendsize, recvsize);
234	(void) freenetconfigent(nconf);
235	if (svc == NULL) {
236		if (madefd)
237			(void)_close(fd);
238		return (NULL);
239	}
240	port = (((struct sockaddr_in *)svc->xp_ltaddr.buf)->sin_port);
241	svc->xp_port = ntohs(port);
242	return (svc);
243}
244
245SVCXPRT *
246svctcp_create(int fd, u_int sendsize, u_int recvsize)
247{
248
249	return svc_com_create(fd, sendsize, recvsize, "tcp");
250}
251
252SVCXPRT *
253svcudp_bufcreate(int fd, u_int sendsz, u_int recvsz)
254{
255
256	return svc_com_create(fd, sendsz, recvsz, "udp");
257}
258
259SVCXPRT *
260svcfd_create(int fd, u_int sendsize, u_int recvsize)
261{
262
263	return svc_fd_create(fd, sendsize, recvsize);
264}
265
266
267SVCXPRT *
268svcudp_create(int fd)
269{
270
271	return svc_com_create(fd, UDPMSGSIZE, UDPMSGSIZE, "udp");
272}
273
274SVCXPRT *
275svcraw_create(void)
276{
277
278	return svc_raw_create();
279}
280
281int
282get_myaddress(struct sockaddr_in *addr)
283{
284
285	memset((void *) addr, 0, sizeof(*addr));
286	addr->sin_family = AF_INET;
287	addr->sin_port = htons(PMAPPORT);
288	addr->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
289	return (0);
290}
291
292/*
293 * For connectionless "udp" transport. Obsoleted by rpc_call().
294 */
295int
296callrpc(const char *host, int prognum, int versnum, int procnum,
297    xdrproc_t inproc, void *in, xdrproc_t outproc, void *out)
298{
299
300	return (int)rpc_call(host, (rpcprog_t)prognum, (rpcvers_t)versnum,
301	    (rpcproc_t)procnum, inproc, in, outproc, out, "udp");
302}
303
304/*
305 * For connectionless kind of transport. Obsoleted by rpc_reg()
306 */
307int
308registerrpc(int prognum, int versnum, int procnum,
309    char *(*progname)(char [UDPMSGSIZE]),
310    xdrproc_t inproc, xdrproc_t outproc)
311{
312
313	return rpc_reg((rpcprog_t)prognum, (rpcvers_t)versnum,
314	    (rpcproc_t)procnum, progname, inproc, outproc, "udp");
315}
316
317/*
318 * All the following clnt_broadcast stuff is convulated; it supports
319 * the earlier calling style of the callback function
320 */
321static thread_key_t	clnt_broadcast_key;
322static resultproc_t	clnt_broadcast_result_main;
323static once_t		clnt_broadcast_once = ONCE_INITIALIZER;
324
325static void
326clnt_broadcast_key_init(void)
327{
328
329	thr_keycreate(&clnt_broadcast_key, free);
330}
331
332/*
333 * Need to translate the netbuf address into sockaddr_in address.
334 * Dont care about netid here.
335 */
336/* ARGSUSED */
337static bool_t
338rpc_wrap_bcast(char *resultp, struct netbuf *addr, struct netconfig *nconf)
339/*
340 *	char *resultp;		// results of the call
341 *	struct netbuf *addr;	// address of the guy who responded
342 *	struct netconfig *nconf; // Netconf of the transport
343 */
344{
345	resultproc_t clnt_broadcast_result;
346
347	if (strcmp(nconf->nc_netid, "udp"))
348		return (FALSE);
349	if (thr_main())
350		clnt_broadcast_result = clnt_broadcast_result_main;
351	else
352		clnt_broadcast_result = (resultproc_t)thr_getspecific(clnt_broadcast_key);
353	return (*clnt_broadcast_result)(resultp,
354				(struct sockaddr_in *)addr->buf);
355}
356
357/*
358 * Broadcasts on UDP transport. Obsoleted by rpc_broadcast().
359 */
360enum clnt_stat
361clnt_broadcast(u_long prog, u_long vers, u_long proc, xdrproc_t xargs,
362    void *argsp, xdrproc_t xresults, void *resultsp, resultproc_t eachresult)
363/*
364 *	u_long		prog;		// program number
365 *	u_long		vers;		// version number
366 *	u_long		proc;		// procedure number
367 *	xdrproc_t	xargs;		// xdr routine for args
368 *	void	       *argsp;		// pointer to args
369 *	xdrproc_t	xresults;	// xdr routine for results
370 *	void	       *resultsp;	// pointer to results
371 *	resultproc_t	eachresult;	// call with each result obtained
372 */
373{
374
375	if (thr_main())
376		clnt_broadcast_result_main = eachresult;
377	else {
378		thr_once(&clnt_broadcast_once, clnt_broadcast_key_init);
379		thr_setspecific(clnt_broadcast_key, (void *) eachresult);
380	}
381	return rpc_broadcast((rpcprog_t)prog, (rpcvers_t)vers,
382	    (rpcproc_t)proc, xargs, argsp, xresults, resultsp,
383	    (resultproc_t) rpc_wrap_bcast, "udp");
384}
385
386/*
387 * Create the client des authentication object. Obsoleted by
388 * authdes_seccreate().
389 */
390AUTH *
391authdes_create(char *servername, u_int window, struct sockaddr *syncaddr,
392    des_block *ckey)
393/*
394 *	char *servername;		// network name of server
395 *	u_int window;			// time to live
396 *	struct sockaddr *syncaddr;	// optional hostaddr to sync with
397 *	des_block *ckey;		// optional conversation key to use
398 */
399{
400	AUTH *dummy;
401	AUTH *nauth;
402	char hostname[NI_MAXHOST];
403
404	if (syncaddr) {
405		/*
406		 * Change addr to hostname, because that is the way
407		 * new interface takes it.
408		 */
409		if (getnameinfo(syncaddr, syncaddr->sa_len, hostname,
410		    sizeof hostname, NULL, 0, 0) != 0)
411			goto fallback;
412
413		nauth = authdes_seccreate(servername, window, hostname, ckey);
414		return (nauth);
415	}
416fallback:
417	dummy = authdes_seccreate(servername, window, NULL, ckey);
418	return (dummy);
419}
420
421/*
422 * Create a client handle for a unix connection. Obsoleted by clnt_vc_create()
423 */
424CLIENT *
425clntunix_create(struct sockaddr_un *raddr, u_long prog, u_long vers, int *sockp,
426    u_int sendsz, u_int recvsz)
427{
428	struct netbuf *svcaddr;
429	CLIENT *cl;
430	int len;
431
432	cl = NULL;
433	svcaddr = NULL;
434	if ((raddr->sun_len == 0) ||
435	   ((svcaddr = malloc(sizeof(struct netbuf))) == NULL ) ||
436	   ((svcaddr->buf = malloc(sizeof(struct sockaddr_un))) == NULL)) {
437		free(svcaddr);
438		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
439		rpc_createerr.cf_error.re_errno = errno;
440		return(cl);
441	}
442	if (*sockp < 0) {
443		*sockp = _socket(AF_LOCAL, SOCK_STREAM, 0);
444		len = raddr->sun_len = SUN_LEN(raddr);
445		if ((*sockp < 0) || (_connect(*sockp,
446		    (struct sockaddr *)raddr, len) < 0)) {
447			rpc_createerr.cf_stat = RPC_SYSTEMERROR;
448			rpc_createerr.cf_error.re_errno = errno;
449			if (*sockp != -1)
450				(void)_close(*sockp);
451			goto done;
452		}
453	}
454	svcaddr->buf = raddr;
455	svcaddr->len = raddr->sun_len;
456	svcaddr->maxlen = sizeof (struct sockaddr_un);
457	cl = clnt_vc_create(*sockp, svcaddr, prog,
458	    vers, sendsz, recvsz);
459done:
460	free(svcaddr->buf);
461	free(svcaddr);
462	return(cl);
463}
464
465/*
466 * Creates, registers, and returns a (rpc) unix based transporter.
467 * Obsoleted by svc_vc_create().
468 */
469SVCXPRT *
470svcunix_create(int sock, u_int sendsize, u_int recvsize, char *path)
471{
472	struct netconfig *nconf;
473	void *localhandle;
474	struct sockaddr_un sun;
475	struct sockaddr *sa;
476	struct t_bind taddr;
477	SVCXPRT *xprt;
478	int addrlen;
479
480	xprt = (SVCXPRT *)NULL;
481	localhandle = setnetconfig();
482	while ((nconf = getnetconfig(localhandle)) != NULL) {
483		if (nconf->nc_protofmly != NULL &&
484		    strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
485			break;
486	}
487	if (nconf == NULL)
488		goto done;
489
490	if ((sock = __rpc_nconf2fd(nconf)) < 0)
491		goto done;
492
493	memset(&sun, 0, sizeof sun);
494	sun.sun_family = AF_LOCAL;
495	if (strlcpy(sun.sun_path, path, sizeof(sun.sun_path)) >=
496	    sizeof(sun.sun_path))
497		goto done;
498	sun.sun_len = SUN_LEN(&sun);
499	addrlen = sizeof (struct sockaddr_un);
500	sa = (struct sockaddr *)&sun;
501
502	if (_bind(sock, sa, addrlen) < 0)
503		goto done;
504
505	taddr.addr.len = taddr.addr.maxlen = addrlen;
506	taddr.addr.buf = malloc(addrlen);
507	if (taddr.addr.buf == NULL)
508		goto done;
509	memcpy(taddr.addr.buf, sa, addrlen);
510
511	if (nconf->nc_semantics != NC_TPI_CLTS) {
512		if (_listen(sock, SOMAXCONN) < 0) {
513			free(taddr.addr.buf);
514			goto done;
515		}
516	}
517
518	xprt = (SVCXPRT *)svc_tli_create(sock, nconf, &taddr, sendsize, recvsize);
519
520done:
521	endnetconfig(localhandle);
522	return(xprt);
523}
524
525/*
526 * Like svunix_create(), except the routine takes any *open* UNIX file
527 * descriptor as its first input. Obsoleted by svc_fd_create();
528 */
529SVCXPRT *
530svcunixfd_create(int fd, u_int sendsize, u_int recvsize)
531{
532 	return (svc_fd_create(fd, sendsize, recvsize));
533}
534
535#endif /* PORTMAP */
536