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
72 static CLIENT *clnt_com_create(struct sockaddr_in *, rpcprog_t, rpcvers_t,
73 int *, u_int, u_int, char *);
74 static SVCXPRT *svc_com_create(int, u_int, u_int, char *);
75 static 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 */
84 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)85 clnt_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
143 syserror:
144 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
145 rpc_createerr.cf_error.re_errno = errno;
146
147 err: if (madefd == TRUE)
148 (void)_close(fd);
149 (void) freenetconfigent(nconf);
150 mutex_unlock(&rpcsoc_lock);
151 return (NULL);
152 }
153
154 CLIENT *
clntudp_bufcreate(struct sockaddr_in * raddr,u_long prog,u_long vers,struct timeval wait,int * sockp,u_int sendsz,u_int recvsz)155 clntudp_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
169 CLIENT *
clntudp_create(struct sockaddr_in * raddr,u_long program,u_long version,struct timeval wait,int * sockp)170 clntudp_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
178 CLIENT *
clnttcp_create(struct sockaddr_in * raddr,u_long prog,u_long vers,int * sockp,u_int sendsz,u_int recvsz)179 clnttcp_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
187 CLIENT *
clntraw_create(u_long prog,u_long vers)188 clntraw_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 */
197 static SVCXPRT *
svc_com_create(int fd,u_int sendsize,u_int recvsize,char * netid)198 svc_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
237 SVCXPRT *
svctcp_create(int fd,u_int sendsize,u_int recvsize)238 svctcp_create(int fd, u_int sendsize, u_int recvsize)
239 {
240
241 return svc_com_create(fd, sendsize, recvsize, "tcp");
242 }
243
244 SVCXPRT *
svcudp_bufcreate(int fd,u_int sendsz,u_int recvsz)245 svcudp_bufcreate(int fd, u_int sendsz, u_int recvsz)
246 {
247
248 return svc_com_create(fd, sendsz, recvsz, "udp");
249 }
250
251 SVCXPRT *
svcfd_create(int fd,u_int sendsize,u_int recvsize)252 svcfd_create(int fd, u_int sendsize, u_int recvsize)
253 {
254
255 return svc_fd_create(fd, sendsize, recvsize);
256 }
257
258
259 SVCXPRT *
svcudp_create(int fd)260 svcudp_create(int fd)
261 {
262
263 return svc_com_create(fd, UDPMSGSIZE, UDPMSGSIZE, "udp");
264 }
265
266 SVCXPRT *
svcraw_create(void)267 svcraw_create(void)
268 {
269
270 return svc_raw_create();
271 }
272
273 int
get_myaddress(struct sockaddr_in * addr)274 get_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 */
287 int
callrpc(const char * host,int prognum,int versnum,int procnum,xdrproc_t inproc,void * in,xdrproc_t outproc,void * out)288 callrpc(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 */
299 int
registerrpc(int prognum,int versnum,int procnum,char * (* progname)(char[UDPMSGSIZE]),xdrproc_t inproc,xdrproc_t outproc)300 registerrpc(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 */
313 static thread_key_t clnt_broadcast_key;
314 static resultproc_t clnt_broadcast_result_main;
315 static once_t clnt_broadcast_once = ONCE_INITIALIZER;
316
317 static void
clnt_broadcast_key_init(void)318 clnt_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 */
329 static bool_t
rpc_wrap_bcast(char * resultp,struct netbuf * addr,struct netconfig * nconf)330 rpc_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 */
352 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)353 clnt_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 */
382 AUTH *
authdes_create(char * servername,u_int window,struct sockaddr * syncaddr,des_block * ckey)383 authdes_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 }
408 fallback:
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 */
416 CLIENT *
clntunix_create(struct sockaddr_un * raddr,u_long prog,u_long vers,int * sockp,u_int sendsz,u_int recvsz)417 clntunix_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);
451 done:
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 */
461 SVCXPRT *
svcunix_create(int sock,u_int sendsize,u_int recvsize,char * path)462 svcunix_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
512 done:
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 */
521 SVCXPRT *
svcunixfd_create(int fd,u_int sendsize,u_int recvsize)522 svcunixfd_create(int fd, u_int sendsize, u_int recvsize)
523 {
524 return (svc_fd_create(fd, sendsize, recvsize));
525 }
526
527 #endif /* PORTMAP */
528