1 /* $NetBSD: rpc_soc.c,v 1.24 2024/01/23 17:24:38 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 1.24 2024/01/23 17:24:38 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 static CLIENT *clnt_com_create(struct sockaddr_in *, rpcprog_t, rpcvers_t,
100 int *, u_int, u_int, const char *);
101 static SVCXPRT *svc_com_create(int, u_int, u_int, const char *);
102 static bool_t rpc_wrap_bcast(char *, struct netbuf *, struct netconfig *);
103
104 /*
105 * A common clnt create routine
106 */
107 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)108 clnt_com_create(struct sockaddr_in *raddr, rpcprog_t prog, rpcvers_t vers,
109 int *sockp, u_int sendsz, u_int recvsz, const char *tp)
110 {
111 CLIENT *cl;
112 int madefd = FALSE;
113 int fd;
114 struct netconfig *nconf;
115 struct netbuf bindaddr;
116
117 _DIAGASSERT(raddr != NULL);
118 _DIAGASSERT(sockp != NULL);
119 _DIAGASSERT(tp != NULL);
120
121 fd = *sockp;
122
123 mutex_lock(&rpcsoc_lock);
124 if ((nconf = __rpc_getconfip(tp)) == NULL) {
125 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
126 mutex_unlock(&rpcsoc_lock);
127 return (NULL);
128 }
129 if (fd == RPC_ANYSOCK) {
130 fd = __rpc_nconf2fd(nconf);
131 if (fd == -1)
132 goto syserror;
133 madefd = TRUE;
134 }
135
136 if (raddr->sin_port == 0) {
137 u_int proto;
138 u_short sport;
139
140 mutex_unlock(&rpcsoc_lock); /* pmap_getport is recursive */
141 proto = strcmp(tp, "udp") == 0 ? IPPROTO_UDP : IPPROTO_TCP;
142 sport = pmap_getport(raddr, (u_long)prog, (u_long)vers,
143 proto);
144 if (sport == 0) {
145 goto err;
146 }
147 raddr->sin_port = htons(sport);
148 mutex_lock(&rpcsoc_lock); /* pmap_getport is recursive */
149 }
150
151 /* Transform sockaddr_in to netbuf */
152 bindaddr.maxlen = bindaddr.len = sizeof (struct sockaddr_in);
153 bindaddr.buf = raddr;
154
155 (void)bindresvport(fd, NULL);
156 cl = clnt_tli_create(fd, nconf, &bindaddr, prog, vers,
157 sendsz, recvsz);
158 if (cl) {
159 if (madefd == TRUE) {
160 /*
161 * The fd should be closed while destroying the handle.
162 */
163 (void) CLNT_CONTROL(cl, CLSET_FD_CLOSE, NULL);
164 *sockp = fd;
165 }
166 (void) freenetconfigent(nconf);
167 mutex_unlock(&rpcsoc_lock);
168 return (cl);
169 }
170 goto err;
171
172 syserror:
173 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
174 rpc_createerr.cf_error.re_errno = errno;
175
176 err: if (madefd == TRUE)
177 (void) close(fd);
178 (void) freenetconfigent(nconf);
179 mutex_unlock(&rpcsoc_lock);
180 return (NULL);
181 }
182
183 CLIENT *
clntudp_bufcreate(struct sockaddr_in * raddr,u_long prog,u_long vers,struct timeval wait,int * sockp,u_int sendsz,u_int recvsz)184 clntudp_bufcreate(struct sockaddr_in *raddr, u_long prog, u_long vers, struct timeval wait, int *sockp, u_int sendsz, u_int recvsz)
185 {
186 CLIENT *cl;
187
188 _DIAGASSERT(raddr != NULL);
189 _DIAGASSERT(sockp != NULL);
190
191 cl = clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp,
192 sendsz, recvsz, "udp");
193 if (cl == NULL) {
194 return (NULL);
195 }
196 (void) CLNT_CONTROL(cl, CLSET_RETRY_TIMEOUT, (char *)(void *)&wait);
197 return (cl);
198 }
199
200 CLIENT *
clntudp_create(struct sockaddr_in * raddr,u_long program,u_long version,struct timeval wait,int * sockp)201 clntudp_create(struct sockaddr_in *raddr, u_long program, u_long version,
202 struct timeval wait, int *sockp)
203 {
204 return clntudp_bufcreate(raddr, program, version, wait, sockp,
205 UDPMSGSIZE, UDPMSGSIZE);
206 }
207
208 CLIENT *
clnttcp_create(struct sockaddr_in * raddr,u_long prog,u_long vers,int * sockp,u_int sendsz,u_int recvsz)209 clnttcp_create(struct sockaddr_in *raddr, u_long prog, u_long vers, int *sockp,
210 u_int sendsz, u_int recvsz)
211 {
212 return clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp,
213 sendsz, recvsz, "tcp");
214 }
215
216 CLIENT *
clntraw_create(u_long prog,u_long vers)217 clntraw_create(u_long prog, u_long vers)
218 {
219 return clnt_raw_create((rpcprog_t)prog, (rpcvers_t)vers);
220 }
221
222 /*
223 * A common server create routine
224 */
225 static SVCXPRT *
svc_com_create(int fd,u_int sendsize,u_int recvsize,const char * netid)226 svc_com_create(int fd, u_int sendsize, u_int recvsize, const char *netid)
227 {
228 struct netconfig *nconf;
229 SVCXPRT *svc;
230 int madefd = FALSE;
231 int port;
232 struct sockaddr_in sccsin;
233
234 _DIAGASSERT(netid != NULL);
235
236 if ((nconf = __rpc_getconfip(netid)) == NULL) {
237 (void) syslog(LOG_ERR, "Could not get %s transport", netid);
238 return (NULL);
239 }
240 if (fd == RPC_ANYSOCK) {
241 fd = __rpc_nconf2fd(nconf);
242 if (fd == -1) {
243 (void) freenetconfigent(nconf);
244 (void) syslog(LOG_ERR,
245 "svc%s_create: could not open connection", netid);
246 return (NULL);
247 }
248 madefd = TRUE;
249 }
250
251 memset(&sccsin, 0, sizeof sccsin);
252 sccsin.sin_family = AF_INET;
253 (void)bindresvport(fd, &sccsin);
254
255 switch (nconf->nc_semantics) {
256 case NC_TPI_COTS:
257 case NC_TPI_COTS_ORD:
258 if (listen(fd, SOMAXCONN) == -1) {
259 (void) syslog(LOG_ERR,
260 "svc%s_create: listen(2) failed: %s",
261 netid, strerror(errno));
262 (void) freenetconfigent(nconf);
263 goto out;
264 }
265 break;
266 default:
267 break;
268 }
269
270 svc = svc_tli_create(fd, nconf, NULL, sendsize, recvsize);
271 (void) freenetconfigent(nconf);
272 if (svc == NULL)
273 goto out;
274 port = (((struct sockaddr_in *)svc->xp_ltaddr.buf)->sin_port);
275 svc->xp_port = ntohs(port);
276 return svc;
277 out:
278 if (madefd)
279 (void) close(fd);
280 return NULL;
281 }
282
283 SVCXPRT *
svctcp_create(int fd,u_int sendsize,u_int recvsize)284 svctcp_create(int fd, u_int sendsize, u_int recvsize)
285 {
286 return svc_com_create(fd, sendsize, recvsize, "tcp");
287 }
288
289 SVCXPRT *
svcudp_bufcreate(int fd,u_int sendsz,u_int recvsz)290 svcudp_bufcreate(int fd, u_int sendsz, u_int recvsz)
291 {
292 return svc_com_create(fd, sendsz, recvsz, "udp");
293 }
294
295 SVCXPRT *
svcfd_create(int fd,u_int sendsize,u_int recvsize)296 svcfd_create(int fd, u_int sendsize, u_int recvsize)
297 {
298 return svc_fd_create(fd, sendsize, recvsize);
299 }
300
301
302 SVCXPRT *
svcudp_create(int fd)303 svcudp_create(int fd)
304 {
305 return svc_com_create(fd, UDPMSGSIZE, UDPMSGSIZE, "udp");
306 }
307
308 SVCXPRT *
svcraw_create(void)309 svcraw_create(void)
310 {
311 return svc_raw_create();
312 }
313
314 int
get_myaddress(struct sockaddr_in * addr)315 get_myaddress(struct sockaddr_in *addr)
316 {
317
318 _DIAGASSERT(addr != NULL);
319
320 memset((void *) addr, 0, sizeof(*addr));
321 addr->sin_family = AF_INET;
322 addr->sin_port = htons(PMAPPORT);
323 addr->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
324 return (0);
325 }
326
327 /*
328 * For connectionless "udp" transport. Obsoleted by rpc_call().
329 */
330 int
callrpc(char * host,int prognum,int versnum,int procnum,xdrproc_t inproc,char * in,xdrproc_t outproc,char * out)331 callrpc(char *host, int prognum, int versnum, int procnum,
332 xdrproc_t inproc, char *in, xdrproc_t outproc, char *out)
333 {
334 return (int)rpc_call(host, (rpcprog_t)prognum, (rpcvers_t)versnum,
335 (rpcproc_t)procnum, inproc, in, outproc, out, "udp");
336 }
337
338 /*
339 * For connectionless kind of transport. Obsoleted by rpc_reg()
340 */
341 int
registerrpc(int prognum,int versnum,int procnum,char * (* progname)(char[UDPMSGSIZE]),xdrproc_t inproc,xdrproc_t outproc)342 registerrpc(int prognum, int versnum, int procnum,
343 char *(*progname)(char [UDPMSGSIZE]),
344 xdrproc_t inproc, xdrproc_t outproc)
345 {
346 return rpc_reg((rpcprog_t)prognum, (rpcvers_t)versnum,
347 (rpcproc_t)procnum, progname, inproc, outproc, __UNCONST("udp"));
348 }
349
350 /*
351 * All the following clnt_broadcast stuff is convulated; it supports
352 * the earlier calling style of the callback function
353 */
354 #ifdef _REENTRANT
355 static thread_key_t clnt_broadcast_key;
356 #endif
357 static resultproc_t clnt_broadcast_result_main;
358
359 /*
360 * Need to translate the netbuf address into sockaddr_in address.
361 * Dont care about netid here.
362 */
363 /* ARGSUSED */
364 static bool_t
rpc_wrap_bcast(char * resultp,struct netbuf * addr,struct netconfig * nconf)365 rpc_wrap_bcast(
366 char *resultp, /* results of the call */
367 struct netbuf *addr, /* address of the guy who responded */
368 struct netconfig *nconf) /* Netconf of the transport */
369 {
370 resultproc_t clnt_broadcast_result;
371
372 _DIAGASSERT(resultp != NULL);
373 _DIAGASSERT(addr != NULL);
374 _DIAGASSERT(nconf != NULL);
375
376 if (strcmp(nconf->nc_netid, "udp"))
377 return (FALSE);
378 #ifdef _REENTRANT
379 if (__isthreaded == 0)
380 clnt_broadcast_result = clnt_broadcast_result_main;
381 else
382 clnt_broadcast_result = thr_getspecific(clnt_broadcast_key);
383 #else
384 clnt_broadcast_result = clnt_broadcast_result_main;
385 #endif
386 return (*clnt_broadcast_result)(resultp,
387 (struct sockaddr_in *)addr->buf);
388 }
389
390 #ifdef _REENTRANT
391 static once_t clnt_broadcast_once = ONCE_INITIALIZER;
392
393 static void
clnt_broadcast_setup(void)394 clnt_broadcast_setup(void)
395 {
396
397 thr_keycreate(&clnt_broadcast_key, free);
398 }
399 #endif
400
401 /*
402 * Broadcasts on UDP transport. Obsoleted by rpc_broadcast().
403 */
404 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)405 clnt_broadcast(
406 u_long prog, /* program number */
407 u_long vers, /* version number */
408 u_long proc, /* procedure number */
409 xdrproc_t xargs, /* xdr routine for args */
410 caddr_t argsp, /* pointer to args */
411 xdrproc_t xresults, /* xdr routine for results */
412 caddr_t resultsp, /* pointer to results */
413 resultproc_t eachresult) /* call with each result obtained */
414 {
415 #ifdef _REENTRANT
416 if (__isthreaded == 0)
417 clnt_broadcast_result_main = eachresult;
418 else {
419 thr_once(&clnt_broadcast_once, clnt_broadcast_setup);
420 thr_setspecific(clnt_broadcast_key, (void *) eachresult);
421 }
422 #else
423 clnt_broadcast_result_main = eachresult;
424 #endif
425 return rpc_broadcast((rpcprog_t)prog, (rpcvers_t)vers,
426 (rpcproc_t)proc, xargs, argsp, xresults, resultsp,
427 (resultproc_t) rpc_wrap_bcast, "udp");
428 }
429
430 #endif /* PORTMAP */
431