1 /* $NetBSD: rpc_soc.c,v 1.19 2014/05/28 14:45:57 christos Exp $ */
2
3 /*
4 * Copyright (c) 2010, Oracle America, Inc.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met:
9 *
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials
15 * provided with the distribution.
16 * * Neither the name of the "Oracle America, 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
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 /* #ident "@(#)rpc_soc.c 1.17 94/04/24 SMI" */
35
36 /*
37 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
38 * In addition, portions of such source code were derived from Berkeley
39 * 4.3 BSD under license from the Regents of the University of
40 * California.
41 */
42
43 #include <sys/cdefs.h>
44 #if defined(LIBC_SCCS) && !defined(lint)
45 #if 0
46 static char sccsid[] = "@(#)rpc_soc.c 1.41 89/05/02 Copyr 1988 Sun Micro";
47 #else
48 __RCSID("$NetBSD: rpc_soc.c,v 1.19 2014/05/28 14:45:57 christos Exp $");
49 #endif
50 #endif
51
52 #ifdef PORTMAP
53 /*
54 * rpc_soc.c
55 *
56 * The backward compatibility routines for the earlier implementation
57 * of RPC, where the only transports supported were tcp/ip and udp/ip.
58 * Based on berkeley socket abstraction, now implemented on the top
59 * of TLI/Streams
60 */
61
62 #include "namespace.h"
63 #include "reentrant.h"
64 #include <sys/types.h>
65 #include <sys/socket.h>
66 #include <stdio.h>
67 #include <rpc/rpc.h>
68 #include <rpc/pmap_clnt.h>
69 #include <rpc/pmap_prot.h>
70 #include <rpc/nettype.h>
71 #include <netinet/in.h>
72 #include <assert.h>
73 #include <errno.h>
74 #include <netdb.h>
75 #include <stdlib.h>
76 #include <string.h>
77 #include <syslog.h>
78 #include <unistd.h>
79
80 #include "svc_fdset.h"
81 #include "rpc_internal.h"
82
83 #ifdef __weak_alias
84 __weak_alias(clntudp_bufcreate,_clntudp_bufcreate)
85 __weak_alias(clntudp_create,_clntudp_create)
86 __weak_alias(clnttcp_create,_clnttcp_create)
87 __weak_alias(clntraw_create,_clntraw_create)
88 __weak_alias(get_myaddress,_get_myaddress)
89 __weak_alias(svcfd_create,_svcfd_create)
90 __weak_alias(svcudp_bufcreate,_svcudp_bufcreate)
91 __weak_alias(svcudp_create,_svcudp_create)
92 __weak_alias(svctcp_create,_svctcp_create)
93 __weak_alias(svcraw_create,_svcraw_create)
94 __weak_alias(callrpc,_callrpc)
95 __weak_alias(registerrpc,_registerrpc)
96 __weak_alias(clnt_broadcast,_clnt_broadcast)
97 #endif
98
99 #ifdef _REENTRANT
100 extern mutex_t rpcsoc_lock;
101 #endif
102
103 static CLIENT *clnt_com_create(struct sockaddr_in *, rpcprog_t, rpcvers_t,
104 int *, u_int, u_int, const char *);
105 static SVCXPRT *svc_com_create(int, u_int, u_int, const char *);
106 static bool_t rpc_wrap_bcast(char *, struct netbuf *, struct netconfig *);
107
108 /*
109 * A common clnt create routine
110 */
111 static CLIENT *
clnt_com_create(struct sockaddr_in * raddr,rpcprog_t prog,rpcvers_t vers,int * sockp,u_int sendsz,u_int recvsz,const char * tp)112 clnt_com_create(struct sockaddr_in *raddr, rpcprog_t prog, rpcvers_t vers,
113 int *sockp, u_int sendsz, u_int recvsz, const char *tp)
114 {
115 CLIENT *cl;
116 int madefd = FALSE;
117 int fd;
118 struct netconfig *nconf;
119 struct netbuf bindaddr;
120
121 _DIAGASSERT(raddr != NULL);
122 _DIAGASSERT(sockp != NULL);
123 _DIAGASSERT(tp != NULL);
124
125 fd = *sockp;
126
127 mutex_lock(&rpcsoc_lock);
128 if ((nconf = __rpc_getconfip(tp)) == NULL) {
129 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
130 mutex_unlock(&rpcsoc_lock);
131 return (NULL);
132 }
133 if (fd == RPC_ANYSOCK) {
134 fd = __rpc_nconf2fd(nconf);
135 if (fd == -1)
136 goto syserror;
137 madefd = TRUE;
138 }
139
140 if (raddr->sin_port == 0) {
141 u_int proto;
142 u_short sport;
143
144 mutex_unlock(&rpcsoc_lock); /* pmap_getport is recursive */
145 proto = strcmp(tp, "udp") == 0 ? IPPROTO_UDP : IPPROTO_TCP;
146 sport = pmap_getport(raddr, (u_long)prog, (u_long)vers,
147 proto);
148 if (sport == 0) {
149 goto err;
150 }
151 raddr->sin_port = htons(sport);
152 mutex_lock(&rpcsoc_lock); /* pmap_getport is recursive */
153 }
154
155 /* Transform sockaddr_in to netbuf */
156 bindaddr.maxlen = bindaddr.len = sizeof (struct sockaddr_in);
157 bindaddr.buf = raddr;
158
159 (void)bindresvport(fd, NULL);
160 cl = clnt_tli_create(fd, nconf, &bindaddr, prog, vers,
161 sendsz, recvsz);
162 if (cl) {
163 if (madefd == TRUE) {
164 /*
165 * The fd should be closed while destroying the handle.
166 */
167 (void) CLNT_CONTROL(cl, CLSET_FD_CLOSE, NULL);
168 *sockp = fd;
169 }
170 (void) freenetconfigent(nconf);
171 mutex_unlock(&rpcsoc_lock);
172 return (cl);
173 }
174 goto err;
175
176 syserror:
177 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
178 rpc_createerr.cf_error.re_errno = errno;
179
180 err: if (madefd == TRUE)
181 (void) close(fd);
182 (void) freenetconfigent(nconf);
183 mutex_unlock(&rpcsoc_lock);
184 return (NULL);
185 }
186
187 CLIENT *
clntudp_bufcreate(struct sockaddr_in * raddr,u_long prog,u_long vers,struct timeval wait,int * sockp,u_int sendsz,u_int recvsz)188 clntudp_bufcreate(struct sockaddr_in *raddr, u_long prog, u_long vers, struct timeval wait, int *sockp, u_int sendsz, u_int recvsz)
189 {
190 CLIENT *cl;
191
192 _DIAGASSERT(raddr != NULL);
193 _DIAGASSERT(sockp != NULL);
194
195 cl = clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp,
196 sendsz, recvsz, "udp");
197 if (cl == NULL) {
198 return (NULL);
199 }
200 (void) CLNT_CONTROL(cl, CLSET_RETRY_TIMEOUT, (char *)(void *)&wait);
201 return (cl);
202 }
203
204 CLIENT *
clntudp_create(struct sockaddr_in * raddr,u_long program,u_long version,struct timeval wait,int * sockp)205 clntudp_create(struct sockaddr_in *raddr, u_long program, u_long version,
206 struct timeval wait, int *sockp)
207 {
208 return clntudp_bufcreate(raddr, program, version, wait, sockp,
209 UDPMSGSIZE, UDPMSGSIZE);
210 }
211
212 CLIENT *
clnttcp_create(struct sockaddr_in * raddr,u_long prog,u_long vers,int * sockp,u_int sendsz,u_int recvsz)213 clnttcp_create(struct sockaddr_in *raddr, u_long prog, u_long vers, int *sockp,
214 u_int sendsz, u_int recvsz)
215 {
216 return clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp,
217 sendsz, recvsz, "tcp");
218 }
219
220 CLIENT *
clntraw_create(u_long prog,u_long vers)221 clntraw_create(u_long prog, u_long vers)
222 {
223 return clnt_raw_create((rpcprog_t)prog, (rpcvers_t)vers);
224 }
225
226 /*
227 * A common server create routine
228 */
229 static SVCXPRT *
svc_com_create(int fd,u_int sendsize,u_int recvsize,const char * netid)230 svc_com_create(int fd, u_int sendsize, u_int recvsize, const char *netid)
231 {
232 struct netconfig *nconf;
233 SVCXPRT *svc;
234 int madefd = FALSE;
235 int port;
236 struct sockaddr_in sccsin;
237
238 _DIAGASSERT(netid != NULL);
239
240 if ((nconf = __rpc_getconfip(netid)) == NULL) {
241 (void) syslog(LOG_ERR, "Could not get %s transport", netid);
242 return (NULL);
243 }
244 if (fd == RPC_ANYSOCK) {
245 fd = __rpc_nconf2fd(nconf);
246 if (fd == -1) {
247 (void) freenetconfigent(nconf);
248 (void) syslog(LOG_ERR,
249 "svc%s_create: could not open connection", netid);
250 return (NULL);
251 }
252 madefd = TRUE;
253 }
254
255 memset(&sccsin, 0, sizeof sccsin);
256 sccsin.sin_family = AF_INET;
257 (void)bindresvport(fd, &sccsin);
258 listen(fd, SOMAXCONN);
259 svc = svc_tli_create(fd, nconf, NULL, sendsize, recvsize);
260 (void) freenetconfigent(nconf);
261 if (svc == NULL) {
262 if (madefd)
263 (void) close(fd);
264 return (NULL);
265 }
266 port = (((struct sockaddr_in *)svc->xp_ltaddr.buf)->sin_port);
267 svc->xp_port = ntohs(port);
268 return (svc);
269 }
270
271 SVCXPRT *
svctcp_create(int fd,u_int sendsize,u_int recvsize)272 svctcp_create(int fd, u_int sendsize, u_int recvsize)
273 {
274 return svc_com_create(fd, sendsize, recvsize, "tcp");
275 }
276
277 SVCXPRT *
svcudp_bufcreate(int fd,u_int sendsz,u_int recvsz)278 svcudp_bufcreate(int fd, u_int sendsz, u_int recvsz)
279 {
280 return svc_com_create(fd, sendsz, recvsz, "udp");
281 }
282
283 SVCXPRT *
svcfd_create(int fd,u_int sendsize,u_int recvsize)284 svcfd_create(int fd, u_int sendsize, u_int recvsize)
285 {
286 return svc_fd_create(fd, sendsize, recvsize);
287 }
288
289
290 SVCXPRT *
svcudp_create(int fd)291 svcudp_create(int fd)
292 {
293 return svc_com_create(fd, UDPMSGSIZE, UDPMSGSIZE, "udp");
294 }
295
296 SVCXPRT *
svcraw_create(void)297 svcraw_create(void)
298 {
299 return svc_raw_create();
300 }
301
302 int
get_myaddress(struct sockaddr_in * addr)303 get_myaddress(struct sockaddr_in *addr)
304 {
305
306 _DIAGASSERT(addr != NULL);
307
308 memset((void *) addr, 0, sizeof(*addr));
309 addr->sin_family = AF_INET;
310 addr->sin_port = htons(PMAPPORT);
311 addr->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
312 return (0);
313 }
314
315 /*
316 * For connectionless "udp" transport. Obsoleted by rpc_call().
317 */
318 int
callrpc(char * host,int prognum,int versnum,int procnum,xdrproc_t inproc,char * in,xdrproc_t outproc,char * out)319 callrpc(char *host, int prognum, int versnum, int procnum,
320 xdrproc_t inproc, char *in, xdrproc_t outproc, char *out)
321 {
322 return (int)rpc_call(host, (rpcprog_t)prognum, (rpcvers_t)versnum,
323 (rpcproc_t)procnum, inproc, in, outproc, out, "udp");
324 }
325
326 /*
327 * For connectionless kind of transport. Obsoleted by rpc_reg()
328 */
329 int
registerrpc(int prognum,int versnum,int procnum,char * (* progname)(char[UDPMSGSIZE]),xdrproc_t inproc,xdrproc_t outproc)330 registerrpc(int prognum, int versnum, int procnum,
331 char *(*progname)(char [UDPMSGSIZE]),
332 xdrproc_t inproc, xdrproc_t outproc)
333 {
334 return rpc_reg((rpcprog_t)prognum, (rpcvers_t)versnum,
335 (rpcproc_t)procnum, progname, inproc, outproc, __UNCONST("udp"));
336 }
337
338 /*
339 * All the following clnt_broadcast stuff is convulated; it supports
340 * the earlier calling style of the callback function
341 */
342 #ifdef _REENTRANT
343 static thread_key_t clnt_broadcast_key;
344 #endif
345 static resultproc_t clnt_broadcast_result_main;
346
347 /*
348 * Need to translate the netbuf address into sockaddr_in address.
349 * Dont care about netid here.
350 */
351 /* ARGSUSED */
352 static bool_t
rpc_wrap_bcast(char * resultp,struct netbuf * addr,struct netconfig * nconf)353 rpc_wrap_bcast(
354 char *resultp, /* results of the call */
355 struct netbuf *addr, /* address of the guy who responded */
356 struct netconfig *nconf) /* Netconf of the transport */
357 {
358 resultproc_t clnt_broadcast_result;
359
360 _DIAGASSERT(resultp != NULL);
361 _DIAGASSERT(addr != NULL);
362 _DIAGASSERT(nconf != NULL);
363
364 if (strcmp(nconf->nc_netid, "udp"))
365 return (FALSE);
366 #ifdef _REENTRANT
367 if (__isthreaded == 0)
368 clnt_broadcast_result = clnt_broadcast_result_main;
369 else
370 clnt_broadcast_result = thr_getspecific(clnt_broadcast_key);
371 #else
372 clnt_broadcast_result = clnt_broadcast_result_main;
373 #endif
374 return (*clnt_broadcast_result)(resultp,
375 (struct sockaddr_in *)addr->buf);
376 }
377
378 #ifdef _REENTRANT
379 static once_t clnt_broadcast_once = ONCE_INITIALIZER;
380
381 static void
clnt_broadcast_setup(void)382 clnt_broadcast_setup(void)
383 {
384
385 thr_keycreate(&clnt_broadcast_key, free);
386 }
387 #endif
388
389 /*
390 * Broadcasts on UDP transport. Obsoleted by rpc_broadcast().
391 */
392 enum clnt_stat
clnt_broadcast(u_long prog,u_long vers,u_long proc,xdrproc_t xargs,caddr_t argsp,xdrproc_t xresults,caddr_t resultsp,resultproc_t eachresult)393 clnt_broadcast(
394 u_long prog, /* program number */
395 u_long vers, /* version number */
396 u_long proc, /* procedure number */
397 xdrproc_t xargs, /* xdr routine for args */
398 caddr_t argsp, /* pointer to args */
399 xdrproc_t xresults, /* xdr routine for results */
400 caddr_t resultsp, /* pointer to results */
401 resultproc_t eachresult) /* call with each result obtained */
402 {
403 #ifdef _REENTRANT
404 if (__isthreaded == 0)
405 clnt_broadcast_result_main = eachresult;
406 else {
407 thr_once(&clnt_broadcast_once, clnt_broadcast_setup);
408 thr_setspecific(clnt_broadcast_key, (void *) eachresult);
409 }
410 #else
411 clnt_broadcast_result_main = eachresult;
412 #endif
413 return rpc_broadcast((rpcprog_t)prog, (rpcvers_t)vers,
414 (rpcproc_t)proc, xargs, argsp, xresults, resultsp,
415 (resultproc_t) rpc_wrap_bcast, "udp");
416 }
417
418 #endif /* PORTMAP */
419