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