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