1 /*-
2 * Copyright (c) 2009, Sun Microsystems, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * - Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 * - Redistributions in binary form must reproduce the above copyright notice,
10 * this list of conditions and the following disclaimer in the documentation
11 * and/or other materials provided with the distribution.
12 * - Neither the name of Sun Microsystems, Inc. nor the names of its
13 * contributors may be used to endorse or promote products derived
14 * from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 *
28 * @(#)rpc_soc.c 1.17 94/04/24 SMI; 1.41 89/05/02 Copyr 1988 Sun Micro
29 * $NetBSD: rpc_soc.c,v 1.6 2000/07/06 03:10:35 christos Exp $
30 * $FreeBSD: src/lib/libc/rpc/rpc_soc.c,v 1.15 2006/02/27 22:10:59 deischen Exp $
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 <stdlib.h>
64 #include <string.h>
65 #include <unistd.h>
66 #include "un-namespace.h"
67
68 #include "rpc_com.h"
69 #include "mt_misc.h"
70
71 static CLIENT *clnt_com_create(struct sockaddr_in *, rpcprog_t, rpcvers_t,
72 int *, u_int, u_int, char *);
73 static SVCXPRT *svc_com_create(int, u_int, u_int, char *);
74 static bool_t rpc_wrap_bcast(char *, struct netbuf *, struct netconfig *);
75
76 /* XXX */
77 #define IN4_LOCALHOST_STRING "127.0.0.1"
78 #define IN6_LOCALHOST_STRING "::1"
79
80 /*
81 * A common clnt create routine
82 */
83 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)84 clnt_com_create(struct sockaddr_in *raddr, rpcprog_t prog, rpcvers_t vers,
85 int *sockp, u_int sendsz, u_int recvsz, char *tp)
86 {
87 CLIENT *cl;
88 int madefd = FALSE;
89 int fd = *sockp;
90 struct netconfig *nconf;
91 struct netbuf bindaddr;
92
93 mutex_lock(&rpcsoc_lock);
94 if ((nconf = __rpc_getconfip(tp)) == NULL) {
95 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
96 mutex_unlock(&rpcsoc_lock);
97 return (NULL);
98 }
99 if (fd == RPC_ANYSOCK) {
100 fd = __rpc_nconf2fd(nconf);
101 if (fd == -1)
102 goto syserror;
103 madefd = TRUE;
104 }
105
106 if (raddr->sin_port == 0) {
107 u_int proto;
108 u_short sport;
109
110 mutex_unlock(&rpcsoc_lock); /* pmap_getport is recursive */
111 proto = strcmp(tp, "udp") == 0 ? IPPROTO_UDP : IPPROTO_TCP;
112 sport = pmap_getport(raddr, (u_long)prog, (u_long)vers,
113 proto);
114 if (sport == 0) {
115 goto err;
116 }
117 raddr->sin_port = htons(sport);
118 mutex_lock(&rpcsoc_lock); /* pmap_getport is recursive */
119 }
120
121 /* Transform sockaddr_in to netbuf */
122 bindaddr.maxlen = bindaddr.len = sizeof (struct sockaddr_in);
123 bindaddr.buf = raddr;
124
125 bindresvport(fd, NULL);
126 cl = clnt_tli_create(fd, nconf, &bindaddr, prog, vers,
127 sendsz, recvsz);
128 if (cl) {
129 if (madefd == TRUE) {
130 /*
131 * The fd should be closed while destroying the handle.
132 */
133 CLNT_CONTROL(cl, CLSET_FD_CLOSE, NULL);
134 *sockp = fd;
135 }
136 freenetconfigent(nconf);
137 mutex_unlock(&rpcsoc_lock);
138 return (cl);
139 }
140 goto err;
141
142 syserror:
143 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
144 rpc_createerr.cf_error.re_errno = errno;
145
146 err: if (madefd == TRUE)
147 _close(fd);
148 freenetconfigent(nconf);
149 mutex_unlock(&rpcsoc_lock);
150 return (NULL);
151 }
152
153 CLIENT *
clntudp_bufcreate(struct sockaddr_in * raddr,u_long prog,u_long vers,struct timeval wait,int * sockp,u_int sendsz,u_int recvsz)154 clntudp_bufcreate(struct sockaddr_in *raddr, u_long prog, u_long vers,
155 struct timeval wait, int *sockp, u_int sendsz, u_int recvsz)
156 {
157 CLIENT *cl;
158
159 cl = clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp,
160 sendsz, recvsz, "udp");
161 if (cl == NULL) {
162 return (NULL);
163 }
164 CLNT_CONTROL(cl, CLSET_RETRY_TIMEOUT, &wait);
165 return (cl);
166 }
167
168 CLIENT *
clntudp_create(struct sockaddr_in * raddr,u_long program,u_long version,struct timeval wait,int * sockp)169 clntudp_create(struct sockaddr_in *raddr, u_long program, u_long version,
170 struct timeval wait, int *sockp)
171 {
172
173 return clntudp_bufcreate(raddr, program, version, wait, sockp,
174 UDPMSGSIZE, UDPMSGSIZE);
175 }
176
177 CLIENT *
clnttcp_create(struct sockaddr_in * raddr,u_long prog,u_long vers,int * sockp,u_int sendsz,u_int recvsz)178 clnttcp_create(struct sockaddr_in *raddr, u_long prog, u_long vers, int *sockp,
179 u_int sendsz, u_int recvsz)
180 {
181
182 return clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp,
183 sendsz, recvsz, "tcp");
184 }
185
186 CLIENT *
clntraw_create(u_long prog,u_long vers)187 clntraw_create(u_long prog, u_long vers)
188 {
189
190 return clnt_raw_create((rpcprog_t)prog, (rpcvers_t)vers);
191 }
192
193 /*
194 * A common server create routine
195 */
196 static SVCXPRT *
svc_com_create(int fd,u_int sendsize,u_int recvsize,char * netid)197 svc_com_create(int fd, u_int sendsize, u_int recvsize, char *netid)
198 {
199 struct netconfig *nconf;
200 SVCXPRT *svc;
201 int madefd = FALSE;
202 int port;
203 struct sockaddr_in sin;
204
205 if ((nconf = __rpc_getconfip(netid)) == NULL) {
206 syslog(LOG_ERR, "Could not get %s transport", netid);
207 return (NULL);
208 }
209 if (fd == RPC_ANYSOCK) {
210 fd = __rpc_nconf2fd(nconf);
211 if (fd == -1) {
212 freenetconfigent(nconf);
213 syslog(LOG_ERR,
214 "svc%s_create: could not open connection", netid);
215 return (NULL);
216 }
217 madefd = TRUE;
218 }
219
220 memset(&sin, 0, sizeof sin);
221 sin.sin_family = AF_INET;
222 bindresvport(fd, &sin);
223 _listen(fd, SOMAXCONN);
224 svc = svc_tli_create(fd, nconf, NULL, sendsize, recvsize);
225 freenetconfigent(nconf);
226 if (svc == NULL) {
227 if (madefd)
228 _close(fd);
229 return (NULL);
230 }
231 port = (((struct sockaddr_in *)svc->xp_ltaddr.buf)->sin_port);
232 svc->xp_port = ntohs(port);
233 return (svc);
234 }
235
236 SVCXPRT *
svctcp_create(int fd,u_int sendsize,u_int recvsize)237 svctcp_create(int fd, u_int sendsize, u_int recvsize)
238 {
239
240 return svc_com_create(fd, sendsize, recvsize, "tcp");
241 }
242
243 SVCXPRT *
svcudp_bufcreate(int fd,u_int sendsz,u_int recvsz)244 svcudp_bufcreate(int fd, u_int sendsz, u_int recvsz)
245 {
246
247 return svc_com_create(fd, sendsz, recvsz, "udp");
248 }
249
250 SVCXPRT *
svcfd_create(int fd,u_int sendsize,u_int recvsize)251 svcfd_create(int fd, u_int sendsize, u_int recvsize)
252 {
253
254 return svc_fd_create(fd, sendsize, recvsize);
255 }
256
257
258 SVCXPRT *
svcudp_create(int fd)259 svcudp_create(int fd)
260 {
261
262 return svc_com_create(fd, UDPMSGSIZE, UDPMSGSIZE, "udp");
263 }
264
265 SVCXPRT *
svcraw_create(void)266 svcraw_create(void)
267 {
268
269 return svc_raw_create();
270 }
271
272 int
get_myaddress(struct sockaddr_in * addr)273 get_myaddress(struct sockaddr_in *addr)
274 {
275
276 memset((void *) addr, 0, sizeof(*addr));
277 addr->sin_family = AF_INET;
278 addr->sin_port = htons(PMAPPORT);
279 addr->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
280 return (0);
281 }
282
283 /*
284 * For connectionless "udp" transport. Obsoleted by rpc_call().
285 */
286 int
callrpc(const char * host,int prognum,int versnum,int procnum,xdrproc_t inproc,void * in,xdrproc_t outproc,void * out)287 callrpc(const char *host, int prognum, int versnum, int procnum,
288 xdrproc_t inproc, void *in, xdrproc_t outproc, void *out)
289 {
290
291 return (int)rpc_call(host, (rpcprog_t)prognum, (rpcvers_t)versnum,
292 (rpcproc_t)procnum, inproc, in, outproc, out, "udp");
293 }
294
295 /*
296 * For connectionless kind of transport. Obsoleted by rpc_reg()
297 */
298 int
registerrpc(int prognum,int versnum,int procnum,char * (* progname)(char *),xdrproc_t inproc,xdrproc_t outproc)299 registerrpc(int prognum, int versnum, int procnum, char *(*progname)(char *),
300 xdrproc_t inproc, xdrproc_t outproc)
301 {
302
303 return rpc_reg((rpcprog_t)prognum, (rpcvers_t)versnum,
304 (rpcproc_t)procnum, progname, inproc, outproc, "udp");
305 }
306
307 /*
308 * All the following clnt_broadcast stuff is convulated; it supports
309 * the earlier calling style of the callback function
310 */
311 static thread_key_t clnt_broadcast_key;
312 static resultproc_t clnt_broadcast_result_main;
313
314 /*
315 * Need to translate the netbuf address into sockaddr_in address.
316 * Dont care about netid here.
317 */
318 /* ARGSUSED */
319 static bool_t
rpc_wrap_bcast(char * resultp,struct netbuf * addr,struct netconfig * nconf)320 rpc_wrap_bcast(char *resultp, /* results of the call */
321 struct netbuf *addr, /* address of the guy who responded */
322 struct netconfig *nconf) /* Netconf of the transport */
323 {
324 resultproc_t clnt_broadcast_result;
325
326 if (strcmp(nconf->nc_netid, "udp"))
327 return (FALSE);
328 if (thr_main())
329 clnt_broadcast_result = clnt_broadcast_result_main;
330 else
331 clnt_broadcast_result = (resultproc_t)thr_getspecific(clnt_broadcast_key);
332 return (*clnt_broadcast_result)(resultp,
333 (struct sockaddr_in *)addr->buf);
334 }
335
336 /*
337 * Broadcasts on UDP transport. Obsoleted by rpc_broadcast().
338 */
339 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)340 clnt_broadcast(u_long prog, /* program number */
341 u_long vers, /* version number */
342 u_long proc, /* procedure number */
343 xdrproc_t xargs, /* xdr routine for args */
344 void *argsp, /* pointer to args */
345 xdrproc_t xresults, /* xdr routine for results */
346 void *resultsp, /* pointer to results */
347 resultproc_t eachresult) /* call with each result obtained */
348 {
349
350 if (thr_main())
351 clnt_broadcast_result_main = eachresult;
352 else {
353 if (clnt_broadcast_key == 0) {
354 mutex_lock(&tsd_lock);
355 if (clnt_broadcast_key == 0)
356 thr_keycreate(&clnt_broadcast_key, free);
357 mutex_unlock(&tsd_lock);
358 }
359 thr_setspecific(clnt_broadcast_key, (void *) eachresult);
360 }
361 return rpc_broadcast((rpcprog_t)prog, (rpcvers_t)vers,
362 (rpcproc_t)proc, xargs, argsp, xresults, resultsp,
363 (resultproc_t) rpc_wrap_bcast, "udp");
364 }
365
366 /*
367 * Create the client des authentication object. Obsoleted by
368 * authdes_seccreate().
369 */
370 AUTH *
authdes_create(char * servername,u_int window,struct sockaddr * syncaddr,des_block * ckey)371 authdes_create(char *servername, /* network name of server */
372 u_int window, /* time to live */
373 struct sockaddr *syncaddr,/* optional hostaddr to sync with */
374 des_block *ckey) /* optional conversation key to use */
375 {
376 AUTH *dummy;
377 AUTH *nauth;
378 char hostname[NI_MAXHOST];
379
380 if (syncaddr) {
381 /*
382 * Change addr to hostname, because that is the way
383 * new interface takes it.
384 */
385 if (getnameinfo(syncaddr, syncaddr->sa_len, hostname,
386 sizeof hostname, NULL, 0, 0) != 0)
387 goto fallback;
388
389 nauth = authdes_seccreate(servername, window, hostname, ckey);
390 return (nauth);
391 }
392 fallback:
393 dummy = authdes_seccreate(servername, window, NULL, ckey);
394 return (dummy);
395 }
396
397 /*
398 * Create a client handle for a unix connection. Obsoleted by clnt_vc_create()
399 */
400 CLIENT *
clntunix_create(struct sockaddr_un * raddr,u_long prog,u_long vers,int * sockp,u_int sendsz,u_int recvsz)401 clntunix_create(struct sockaddr_un *raddr, u_long prog, u_long vers, int *sockp,
402 u_int sendsz, u_int recvsz)
403 {
404 struct netbuf *svcaddr;
405 CLIENT *cl;
406 int len;
407
408 cl = NULL;
409 svcaddr = NULL;
410 if ((raddr->sun_len == 0) ||
411 ((svcaddr = malloc(sizeof(struct netbuf))) == NULL ) ||
412 ((svcaddr->buf = malloc(sizeof(struct sockaddr_un))) == NULL)) {
413 if (svcaddr != NULL)
414 free(svcaddr);
415 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
416 rpc_createerr.cf_error.re_errno = errno;
417 return(cl);
418 }
419 if (*sockp < 0) {
420 *sockp = _socket(AF_LOCAL, SOCK_STREAM, 0);
421 len = raddr->sun_len = SUN_LEN(raddr);
422 if ((*sockp < 0) || (_connect(*sockp,
423 (struct sockaddr *)raddr, len) < 0)) {
424 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
425 rpc_createerr.cf_error.re_errno = errno;
426 if (*sockp != -1)
427 _close(*sockp);
428 goto done;
429 }
430 }
431 svcaddr->buf = raddr;
432 svcaddr->len = raddr->sun_len;
433 svcaddr->maxlen = sizeof (struct sockaddr_un);
434 cl = clnt_vc_create(*sockp, svcaddr, prog,
435 vers, sendsz, recvsz);
436 done:
437 free(svcaddr->buf);
438 free(svcaddr);
439 return(cl);
440 }
441
442 /*
443 * Creates, registers, and returns a (rpc) unix based transporter.
444 * Obsoleted by svc_vc_create().
445 */
446 SVCXPRT *
svcunix_create(int sock,u_int sendsize,u_int recvsize,char * path)447 svcunix_create(int sock, u_int sendsize, u_int recvsize, char *path)
448 {
449 struct netconfig *nconf;
450 void *localhandle;
451 struct sockaddr_un sun;
452 struct sockaddr *sa;
453 struct t_bind taddr;
454 SVCXPRT *xprt;
455 int addrlen;
456
457 xprt = NULL;
458 localhandle = setnetconfig();
459 while ((nconf = getnetconfig(localhandle)) != NULL) {
460 if (nconf->nc_protofmly != NULL &&
461 strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
462 break;
463 }
464 if (nconf == NULL)
465 return(xprt);
466
467 if ((sock = __rpc_nconf2fd(nconf)) < 0)
468 goto done;
469
470 memset(&sun, 0, sizeof sun);
471 sun.sun_family = AF_LOCAL;
472 if (strlcpy(sun.sun_path, path, sizeof(sun.sun_path)) >=
473 sizeof(sun.sun_path))
474 goto done;
475 sun.sun_len = SUN_LEN(&sun);
476 addrlen = sizeof (struct sockaddr_un);
477 sa = (struct sockaddr *)&sun;
478
479 if (_bind(sock, sa, addrlen) < 0)
480 goto done;
481
482 taddr.addr.len = taddr.addr.maxlen = addrlen;
483 taddr.addr.buf = malloc(addrlen);
484 if (taddr.addr.buf == NULL)
485 goto done;
486 memcpy(taddr.addr.buf, sa, addrlen);
487
488 if (nconf->nc_semantics != NC_TPI_CLTS) {
489 if (_listen(sock, SOMAXCONN) < 0) {
490 free(taddr.addr.buf);
491 goto done;
492 }
493 }
494
495 xprt = (SVCXPRT *)svc_tli_create(sock, nconf, &taddr, sendsize, recvsize);
496
497 done:
498 endnetconfig(localhandle);
499 return(xprt);
500 }
501
502 /*
503 * Like svunix_create(), except the routine takes any *open* UNIX file
504 * descriptor as its first input. Obsoleted by svc_fd_create();
505 */
506 SVCXPRT *
svcunixfd_create(int fd,u_int sendsize,u_int recvsize)507 svcunixfd_create(int fd, u_int sendsize, u_int recvsize)
508 {
509 return (svc_fd_create(fd, sendsize, recvsize));
510 }
511
512 #endif /* PORTMAP */
513