1 | /* |
2 | * clnt_udp.c, Implements a UDP/IP based, client side RPC. |
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 | #include <stdio.h> |
35 | #include <unistd.h> |
36 | #include <libintl.h> |
37 | #include <rpc/rpc.h> |
38 | #include <rpc/xdr.h> |
39 | #include <rpc/clnt.h> |
40 | #include <sys/poll.h> |
41 | #include <sys/socket.h> |
42 | #include <sys/ioctl.h> |
43 | #include <netdb.h> |
44 | #include <errno.h> |
45 | #include <stdint.h> |
46 | #include <rpc/pmap_clnt.h> |
47 | #include <net/if.h> |
48 | #include <ifaddrs.h> |
49 | #include <wchar.h> |
50 | #include <fcntl.h> |
51 | |
52 | #ifdef IP_RECVERR |
53 | #include <errqueue.h> |
54 | #include <sys/uio.h> |
55 | #endif |
56 | |
57 | #include <kernel-features.h> |
58 | #include <inet/net-internal.h> |
59 | #include <shlib-compat.h> |
60 | #include <libc-diag.h> |
61 | |
62 | extern u_long _create_xid (void); |
63 | |
64 | /* |
65 | * UDP bases client side rpc operations |
66 | */ |
67 | static enum clnt_stat clntudp_call (CLIENT *, u_long, xdrproc_t, caddr_t, |
68 | xdrproc_t, caddr_t, struct timeval); |
69 | static void clntudp_abort (void); |
70 | static void clntudp_geterr (CLIENT *, struct rpc_err *); |
71 | static bool_t clntudp_freeres (CLIENT *, xdrproc_t, caddr_t); |
72 | static bool_t clntudp_control (CLIENT *, int, char *); |
73 | static void clntudp_destroy (CLIENT *); |
74 | |
75 | static const struct clnt_ops udp_ops = |
76 | { |
77 | clntudp_call, |
78 | clntudp_abort, |
79 | clntudp_geterr, |
80 | clntudp_freeres, |
81 | clntudp_destroy, |
82 | clntudp_control |
83 | }; |
84 | |
85 | /* |
86 | * Private data kept per client handle. This private struct is |
87 | * unfortunately part of the ABI; ypbind contains a copy of it and |
88 | * accesses it through CLIENT::cl_private field. |
89 | */ |
90 | struct cu_data |
91 | { |
92 | int cu_sock; |
93 | bool_t cu_closeit; |
94 | struct sockaddr_in cu_raddr; |
95 | int cu_rlen; |
96 | struct timeval cu_wait; |
97 | struct timeval cu_total; |
98 | struct rpc_err cu_error; |
99 | XDR cu_outxdrs; |
100 | u_int cu_xdrpos; |
101 | u_int cu_sendsz; |
102 | char *cu_outbuf; |
103 | u_int cu_recvsz; |
104 | char cu_inbuf[1]; |
105 | }; |
106 | |
107 | /* |
108 | * Create a UDP based client handle. |
109 | * If *sockp<0, *sockp is set to a newly created UPD socket. |
110 | * If raddr->sin_port is 0 a binder on the remote machine |
111 | * is consulted for the correct port number. |
112 | * NB: It is the clients responsibility to close *sockp. |
113 | * NB: The rpch->cl_auth is initialized to null authentication. |
114 | * Caller may wish to set this something more useful. |
115 | * |
116 | * wait is the amount of time used between retransmitting a call if |
117 | * no response has been heard; retransmission occurs until the actual |
118 | * rpc call times out. |
119 | * |
120 | * sendsz and recvsz are the maximum allowable packet sizes that can be |
121 | * sent and received. |
122 | */ |
123 | CLIENT * |
124 | __libc_clntudp_bufcreate (struct sockaddr_in *raddr, u_long program, |
125 | u_long version, struct timeval wait, int *sockp, |
126 | u_int sendsz, u_int recvsz, int flags) |
127 | { |
128 | CLIENT *cl; |
129 | struct cu_data *cu = NULL; |
130 | struct rpc_msg call_msg; |
131 | |
132 | cl = (CLIENT *) mem_alloc (sizeof (CLIENT)); |
133 | sendsz = ((sendsz + 3) / 4) * 4; |
134 | recvsz = ((recvsz + 3) / 4) * 4; |
135 | cu = (struct cu_data *) mem_alloc (sizeof (*cu) + sendsz + recvsz); |
136 | if (cl == NULL || cu == NULL) |
137 | { |
138 | struct rpc_createerr *ce = &get_rpc_createerr (); |
139 | (void) __fxprintf (NULL, fmt: "%s: %s" , |
140 | "clntudp_create" , _("out of memory\n" )); |
141 | ce->cf_stat = RPC_SYSTEMERROR; |
142 | ce->cf_error.re_errno = ENOMEM; |
143 | goto fooy; |
144 | } |
145 | cu->cu_outbuf = &cu->cu_inbuf[recvsz]; |
146 | |
147 | if (raddr->sin_port == 0) |
148 | { |
149 | u_short port; |
150 | if ((port = |
151 | pmap_getport (raddr, program, version, IPPROTO_UDP)) == 0) |
152 | { |
153 | goto fooy; |
154 | } |
155 | raddr->sin_port = htons (port); |
156 | } |
157 | cl->cl_ops = (struct clnt_ops *) &udp_ops; |
158 | cl->cl_private = (caddr_t) cu; |
159 | cu->cu_raddr = *raddr; |
160 | cu->cu_rlen = sizeof (cu->cu_raddr); |
161 | cu->cu_wait = wait; |
162 | cu->cu_total.tv_sec = -1; |
163 | cu->cu_total.tv_usec = -1; |
164 | cu->cu_sendsz = sendsz; |
165 | cu->cu_recvsz = recvsz; |
166 | call_msg.rm_xid = _create_xid (); |
167 | call_msg.rm_direction = CALL; |
168 | call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION; |
169 | call_msg.rm_call.cb_prog = program; |
170 | call_msg.rm_call.cb_vers = version; |
171 | xdrmem_create (&(cu->cu_outxdrs), cu->cu_outbuf, sendsz, XDR_ENCODE); |
172 | if (!xdr_callhdr (&(cu->cu_outxdrs), &call_msg)) |
173 | { |
174 | goto fooy; |
175 | } |
176 | cu->cu_xdrpos = XDR_GETPOS (&(cu->cu_outxdrs)); |
177 | if (*sockp < 0) |
178 | { |
179 | *sockp = __socket (AF_INET, SOCK_DGRAM|SOCK_NONBLOCK|flags, IPPROTO_UDP); |
180 | if (__glibc_unlikely (*sockp < 0)) |
181 | { |
182 | struct rpc_createerr *ce = &get_rpc_createerr (); |
183 | ce->cf_stat = RPC_SYSTEMERROR; |
184 | ce->cf_error.re_errno = errno; |
185 | goto fooy; |
186 | } |
187 | /* attempt to bind to prov port */ |
188 | (void) bindresvport (*sockp, (struct sockaddr_in *) 0); |
189 | #ifdef IP_RECVERR |
190 | { |
191 | int on = 1; |
192 | __setsockopt (*sockp, SOL_IP, IP_RECVERR, &on, sizeof(on)); |
193 | } |
194 | #endif |
195 | cu->cu_closeit = TRUE; |
196 | } |
197 | else |
198 | { |
199 | cu->cu_closeit = FALSE; |
200 | } |
201 | cu->cu_sock = *sockp; |
202 | cl->cl_auth = authnone_create (); |
203 | return cl; |
204 | fooy: |
205 | if (cu) |
206 | mem_free ((caddr_t) cu, sizeof (*cu) + sendsz + recvsz); |
207 | if (cl) |
208 | mem_free ((caddr_t) cl, sizeof (CLIENT)); |
209 | return (CLIENT *) NULL; |
210 | } |
211 | #ifdef EXPORT_RPC_SYMBOLS |
212 | libc_hidden_def (__libc_clntudp_bufcreate) |
213 | #else |
214 | libc_hidden_nolink_sunrpc (__libc_clntudp_bufcreate, GLIBC_PRIVATE) |
215 | #endif |
216 | |
217 | CLIENT * |
218 | clntudp_bufcreate (struct sockaddr_in *raddr, u_long program, u_long version, |
219 | struct timeval wait, int *sockp, u_int sendsz, |
220 | u_int recvsz) |
221 | { |
222 | return __libc_clntudp_bufcreate (raddr, program, version, wait, |
223 | sockp, sendsz, recvsz, flags: 0); |
224 | } |
225 | libc_hidden_nolink_sunrpc (clntudp_bufcreate, GLIBC_2_0) |
226 | |
227 | CLIENT * |
228 | clntudp_create (struct sockaddr_in *raddr, u_long program, u_long version, |
229 | struct timeval wait, int *sockp) |
230 | { |
231 | return __libc_clntudp_bufcreate (raddr, program, version, wait, |
232 | sockp, UDPMSGSIZE, UDPMSGSIZE, flags: 0); |
233 | } |
234 | #ifdef EXPORT_RPC_SYMBOLS |
235 | libc_hidden_def (clntudp_create) |
236 | #else |
237 | libc_hidden_nolink_sunrpc (clntudp_create, GLIBC_2_0) |
238 | #endif |
239 | |
240 | static int |
241 | is_network_up (int sock) |
242 | { |
243 | struct ifaddrs *ifa; |
244 | |
245 | if (getifaddrs (&ifa) != 0) |
246 | return 0; |
247 | |
248 | struct ifaddrs *run = ifa; |
249 | while (run != NULL) |
250 | { |
251 | if ((run->ifa_flags & IFF_UP) != 0 |
252 | && run->ifa_addr != NULL |
253 | && run->ifa_addr->sa_family == AF_INET) |
254 | break; |
255 | |
256 | run = run->ifa_next; |
257 | } |
258 | |
259 | freeifaddrs (ifa); |
260 | |
261 | return run != NULL; |
262 | } |
263 | |
264 | static enum clnt_stat |
265 | clntudp_call (/* client handle */ |
266 | CLIENT *cl, |
267 | /* procedure number */ |
268 | u_long proc, |
269 | /* xdr routine for args */ |
270 | xdrproc_t xargs, |
271 | /* pointer to args */ |
272 | caddr_t argsp, |
273 | /* xdr routine for results */ |
274 | xdrproc_t xresults, |
275 | /* pointer to results */ |
276 | caddr_t resultsp, |
277 | /* seconds to wait before giving up */ |
278 | struct timeval utimeout) |
279 | { |
280 | struct cu_data *cu = (struct cu_data *) cl->cl_private; |
281 | XDR *xdrs; |
282 | int outlen = 0; |
283 | int inlen; |
284 | socklen_t fromlen; |
285 | struct pollfd fd; |
286 | struct sockaddr_in from; |
287 | struct rpc_msg reply_msg; |
288 | XDR reply_xdrs; |
289 | bool_t ok; |
290 | int nrefreshes = 2; /* number of times to refresh cred */ |
291 | int anyup; /* any network interface up */ |
292 | |
293 | struct deadline_current_time current_time = __deadline_current_time (); |
294 | /* GCC 10 for MIPS reports total_deadline as possibly used |
295 | uninitialized; see |
296 | <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91691>. In fact it |
297 | is initialized conditionally and only ever used under the same |
298 | condition. The same warning is also disabled in |
299 | inet/net-internal.h because in some other configurations GCC |
300 | gives the warning in an inline function. */ |
301 | DIAG_PUSH_NEEDS_COMMENT; |
302 | DIAG_IGNORE_NEEDS_COMMENT (10, "-Wmaybe-uninitialized" ); |
303 | struct deadline total_deadline; /* Determined once by overall timeout. */ |
304 | DIAG_POP_NEEDS_COMMENT; |
305 | struct deadline response_deadline; /* Determined anew for each query. */ |
306 | |
307 | /* Choose the timeout value. For non-sending usage (xargs == NULL), |
308 | the total deadline does not matter, only cu->cu_wait is used |
309 | below. */ |
310 | if (xargs != NULL) |
311 | { |
312 | struct timeval tv; |
313 | if (cu->cu_total.tv_usec == -1) |
314 | /* Use supplied timeout. */ |
315 | tv = utimeout; |
316 | else |
317 | /* Use default timeout. */ |
318 | tv = cu->cu_total; |
319 | if (!__is_timeval_valid_timeout (tv)) |
320 | return (cu->cu_error.re_status = RPC_TIMEDOUT); |
321 | total_deadline = __deadline_from_timeval (current_time, tv); |
322 | } |
323 | |
324 | /* Guard against bad timeout specification. */ |
325 | if (!__is_timeval_valid_timeout (tv: cu->cu_wait)) |
326 | return (cu->cu_error.re_status = RPC_TIMEDOUT); |
327 | |
328 | call_again: |
329 | xdrs = &(cu->cu_outxdrs); |
330 | if (xargs == NULL) |
331 | goto get_reply; |
332 | xdrs->x_op = XDR_ENCODE; |
333 | XDR_SETPOS (xdrs, cu->cu_xdrpos); |
334 | /* |
335 | * the transaction is the first thing in the out buffer |
336 | */ |
337 | (*(uint32_t *) (cu->cu_outbuf))++; |
338 | if ((!XDR_PUTLONG (xdrs, (long *) &proc)) || |
339 | (!AUTH_MARSHALL (cl->cl_auth, xdrs)) || |
340 | (!(*xargs) (xdrs, argsp))) |
341 | return (cu->cu_error.re_status = RPC_CANTENCODEARGS); |
342 | outlen = (int) XDR_GETPOS (xdrs); |
343 | |
344 | send_again: |
345 | if (__sendto (fd: cu->cu_sock, buf: cu->cu_outbuf, n: outlen, flags: 0, |
346 | addr: (struct sockaddr *) &(cu->cu_raddr), addr_len: cu->cu_rlen) |
347 | != outlen) |
348 | { |
349 | cu->cu_error.re_errno = errno; |
350 | return (cu->cu_error.re_status = RPC_CANTSEND); |
351 | } |
352 | |
353 | /* sendto may have blocked, so recompute the current time. */ |
354 | current_time = __deadline_current_time (); |
355 | get_reply: |
356 | response_deadline = __deadline_from_timeval (current_time, tv: cu->cu_wait); |
357 | |
358 | reply_msg.acpted_rply.ar_verf = _null_auth; |
359 | reply_msg.acpted_rply.ar_results.where = resultsp; |
360 | reply_msg.acpted_rply.ar_results.proc = xresults; |
361 | fd.fd = cu->cu_sock; |
362 | fd.events = POLLIN; |
363 | anyup = 0; |
364 | |
365 | /* Per-response retry loop. current_time must be up-to-date at the |
366 | top of the loop. */ |
367 | for (;;) |
368 | { |
369 | int milliseconds; |
370 | if (xargs != NULL) |
371 | { |
372 | if (__deadline_elapsed (current: current_time, deadline: total_deadline)) |
373 | /* Overall timeout expired. */ |
374 | return (cu->cu_error.re_status = RPC_TIMEDOUT); |
375 | milliseconds = __deadline_to_ms |
376 | (current_time, __deadline_first (left: total_deadline, |
377 | right: response_deadline)); |
378 | if (milliseconds == 0) |
379 | /* Per-query timeout expired. */ |
380 | goto send_again; |
381 | } |
382 | else |
383 | { |
384 | /* xatgs == NULL. Collect a response without sending a |
385 | query. In this mode, we need to ignore the total |
386 | deadline. */ |
387 | milliseconds = __deadline_to_ms (current_time, response_deadline); |
388 | if (milliseconds == 0) |
389 | /* Cannot send again, so bail out. */ |
390 | return (cu->cu_error.re_status = RPC_CANTSEND); |
391 | } |
392 | |
393 | switch (__poll (&fd, 1, milliseconds)) |
394 | { |
395 | |
396 | case 0: |
397 | if (anyup == 0) |
398 | { |
399 | anyup = is_network_up (sock: cu->cu_sock); |
400 | if (!anyup) |
401 | return (cu->cu_error.re_status = RPC_CANTRECV); |
402 | } |
403 | goto next_response; |
404 | case -1: |
405 | if (errno == EINTR) |
406 | goto next_response; |
407 | cu->cu_error.re_errno = errno; |
408 | return (cu->cu_error.re_status = RPC_CANTRECV); |
409 | } |
410 | #ifdef IP_RECVERR |
411 | if (fd.revents & POLLERR) |
412 | { |
413 | struct msghdr msg; |
414 | struct cmsghdr *cmsg; |
415 | struct sock_extended_err *e; |
416 | struct sockaddr_in err_addr; |
417 | struct iovec iov; |
418 | char *cbuf = malloc (size: outlen + 256); |
419 | int ret; |
420 | |
421 | if (cbuf == NULL) |
422 | { |
423 | cu->cu_error.re_errno = errno; |
424 | return (cu->cu_error.re_status = RPC_CANTRECV); |
425 | } |
426 | |
427 | iov.iov_base = cbuf + 256; |
428 | iov.iov_len = outlen; |
429 | msg.msg_name = (void *) &err_addr; |
430 | msg.msg_namelen = sizeof (err_addr); |
431 | msg.msg_iov = &iov; |
432 | msg.msg_iovlen = 1; |
433 | msg.msg_flags = 0; |
434 | msg.msg_control = cbuf; |
435 | msg.msg_controllen = 256; |
436 | ret = __recvmsg (fd: cu->cu_sock, message: &msg, MSG_ERRQUEUE); |
437 | if (ret >= 0 |
438 | && memcmp (cbuf + 256, cu->cu_outbuf, ret) == 0 |
439 | && (msg.msg_flags & MSG_ERRQUEUE) |
440 | && ((msg.msg_namelen == 0 |
441 | && ret >= 12) |
442 | || (msg.msg_namelen == sizeof (err_addr) |
443 | && err_addr.sin_family == AF_INET |
444 | && memcmp (&err_addr.sin_addr, &cu->cu_raddr.sin_addr, |
445 | sizeof (err_addr.sin_addr)) == 0 |
446 | && err_addr.sin_port == cu->cu_raddr.sin_port))) |
447 | for (cmsg = CMSG_FIRSTHDR (&msg); cmsg; |
448 | cmsg = CMSG_NXTHDR (&msg, cmsg)) |
449 | if (cmsg->cmsg_level == SOL_IP && cmsg->cmsg_type == IP_RECVERR) |
450 | { |
451 | e = (struct sock_extended_err *) CMSG_DATA(cmsg); |
452 | cu->cu_error.re_errno = e->ee_errno; |
453 | free (ptr: cbuf); |
454 | return (cu->cu_error.re_status = RPC_CANTRECV); |
455 | } |
456 | free (ptr: cbuf); |
457 | } |
458 | #endif |
459 | do |
460 | { |
461 | fromlen = sizeof (struct sockaddr); |
462 | inlen = __recvfrom (fd: cu->cu_sock, buf: cu->cu_inbuf, |
463 | n: (int) cu->cu_recvsz, MSG_DONTWAIT, |
464 | addr: (struct sockaddr *) &from, addr_len: &fromlen); |
465 | } |
466 | while (inlen < 0 && errno == EINTR); |
467 | if (inlen < 0) |
468 | { |
469 | if (errno == EWOULDBLOCK) |
470 | goto next_response; |
471 | cu->cu_error.re_errno = errno; |
472 | return (cu->cu_error.re_status = RPC_CANTRECV); |
473 | } |
474 | /* Accept the response if the packet is sufficiently long and |
475 | the transaction ID matches the query (if available). */ |
476 | if (inlen >= 4 |
477 | && (xargs == NULL |
478 | || memcmp (cu->cu_inbuf, cu->cu_outbuf, |
479 | sizeof (uint32_t)) == 0)) |
480 | break; |
481 | |
482 | next_response: |
483 | /* Update the current time because poll and recvmsg waited for |
484 | an unknown time. */ |
485 | current_time = __deadline_current_time (); |
486 | } |
487 | |
488 | /* |
489 | * now decode and validate the response |
490 | */ |
491 | xdrmem_create (&reply_xdrs, cu->cu_inbuf, (u_int) inlen, XDR_DECODE); |
492 | ok = xdr_replymsg (&reply_xdrs, &reply_msg); |
493 | /* XDR_DESTROY(&reply_xdrs); save a few cycles on noop destroy */ |
494 | if (ok) |
495 | { |
496 | _seterr_reply (&reply_msg, &(cu->cu_error)); |
497 | if (cu->cu_error.re_status == RPC_SUCCESS) |
498 | { |
499 | if (!AUTH_VALIDATE (cl->cl_auth, |
500 | &reply_msg.acpted_rply.ar_verf)) |
501 | { |
502 | cu->cu_error.re_status = RPC_AUTHERROR; |
503 | cu->cu_error.re_why = AUTH_INVALIDRESP; |
504 | } |
505 | if (reply_msg.acpted_rply.ar_verf.oa_base != NULL) |
506 | { |
507 | xdrs->x_op = XDR_FREE; |
508 | (void) xdr_opaque_auth (xdrs, &(reply_msg.acpted_rply.ar_verf)); |
509 | } |
510 | } /* end successful completion */ |
511 | else |
512 | { |
513 | /* maybe our credentials need to be refreshed ... */ |
514 | if (nrefreshes > 0 && AUTH_REFRESH (cl->cl_auth)) |
515 | { |
516 | nrefreshes--; |
517 | goto call_again; |
518 | } |
519 | } /* end of unsuccessful completion */ |
520 | } /* end of valid reply message */ |
521 | else |
522 | { |
523 | cu->cu_error.re_status = RPC_CANTDECODERES; |
524 | } |
525 | return cu->cu_error.re_status; |
526 | } |
527 | |
528 | static void |
529 | clntudp_geterr (CLIENT *cl, struct rpc_err *errp) |
530 | { |
531 | struct cu_data *cu = (struct cu_data *) cl->cl_private; |
532 | |
533 | *errp = cu->cu_error; |
534 | } |
535 | |
536 | |
537 | static bool_t |
538 | clntudp_freeres (CLIENT *cl, xdrproc_t xdr_res, caddr_t res_ptr) |
539 | { |
540 | struct cu_data *cu = (struct cu_data *) cl->cl_private; |
541 | XDR *xdrs = &(cu->cu_outxdrs); |
542 | |
543 | xdrs->x_op = XDR_FREE; |
544 | return (*xdr_res) (xdrs, res_ptr); |
545 | } |
546 | |
547 | static void |
548 | clntudp_abort (void) |
549 | { |
550 | } |
551 | |
552 | static bool_t |
553 | clntudp_control (CLIENT *cl, int request, char *info) |
554 | { |
555 | struct cu_data *cu = (struct cu_data *) cl->cl_private; |
556 | u_long ul; |
557 | uint32_t ui32; |
558 | |
559 | switch (request) |
560 | { |
561 | case CLSET_FD_CLOSE: |
562 | cu->cu_closeit = TRUE; |
563 | break; |
564 | case CLSET_FD_NCLOSE: |
565 | cu->cu_closeit = FALSE; |
566 | break; |
567 | case CLSET_TIMEOUT: |
568 | cu->cu_total = *(struct timeval *) info; |
569 | break; |
570 | case CLGET_TIMEOUT: |
571 | *(struct timeval *) info = cu->cu_total; |
572 | break; |
573 | case CLSET_RETRY_TIMEOUT: |
574 | cu->cu_wait = *(struct timeval *) info; |
575 | break; |
576 | case CLGET_RETRY_TIMEOUT: |
577 | *(struct timeval *) info = cu->cu_wait; |
578 | break; |
579 | case CLGET_SERVER_ADDR: |
580 | *(struct sockaddr_in *) info = cu->cu_raddr; |
581 | break; |
582 | case CLGET_FD: |
583 | *(int *)info = cu->cu_sock; |
584 | break; |
585 | case CLGET_XID: |
586 | /* |
587 | * use the knowledge that xid is the |
588 | * first element in the call structure *. |
589 | * This will get the xid of the PREVIOUS call |
590 | */ |
591 | memcpy (&ui32, cu->cu_outbuf, sizeof (ui32)); |
592 | ul = ntohl (ui32); |
593 | memcpy (info, &ul, sizeof (ul)); |
594 | break; |
595 | case CLSET_XID: |
596 | /* This will set the xid of the NEXT call */ |
597 | memcpy (&ul, info, sizeof (ul)); |
598 | ui32 = htonl (ul - 1); |
599 | memcpy (cu->cu_outbuf, &ui32, sizeof (ui32)); |
600 | /* decrement by 1 as clntudp_call() increments once */ |
601 | break; |
602 | case CLGET_VERS: |
603 | /* |
604 | * This RELIES on the information that, in the call body, |
605 | * the version number field is the fifth field from the |
606 | * beginning of the RPC header. MUST be changed if the |
607 | * call_struct is changed |
608 | */ |
609 | memcpy (&ui32, cu->cu_outbuf + 4 * BYTES_PER_XDR_UNIT, sizeof (ui32)); |
610 | ul = ntohl (ui32); |
611 | memcpy (info, &ul, sizeof (ul)); |
612 | break; |
613 | case CLSET_VERS: |
614 | memcpy (&ul, info, sizeof (ul)); |
615 | ui32 = htonl (ul); |
616 | memcpy (cu->cu_outbuf + 4 * BYTES_PER_XDR_UNIT, &ui32, sizeof (ui32)); |
617 | break; |
618 | case CLGET_PROG: |
619 | /* |
620 | * This RELIES on the information that, in the call body, |
621 | * the program number field is the field from the |
622 | * beginning of the RPC header. MUST be changed if the |
623 | * call_struct is changed |
624 | */ |
625 | memcpy (&ui32, cu->cu_outbuf + 3 * BYTES_PER_XDR_UNIT, sizeof (ui32)); |
626 | ul = ntohl (ui32); |
627 | memcpy (info, &ul, sizeof (ul)); |
628 | break; |
629 | case CLSET_PROG: |
630 | memcpy (&ul, info, sizeof (ul)); |
631 | ui32 = htonl (ul); |
632 | memcpy (cu->cu_outbuf + 3 * BYTES_PER_XDR_UNIT, &ui32, sizeof (ui32)); |
633 | break; |
634 | /* The following are only possible with TI-RPC */ |
635 | case CLGET_SVC_ADDR: |
636 | case CLSET_SVC_ADDR: |
637 | case CLSET_PUSH_TIMOD: |
638 | case CLSET_POP_TIMOD: |
639 | default: |
640 | return FALSE; |
641 | } |
642 | return TRUE; |
643 | } |
644 | |
645 | static void |
646 | clntudp_destroy (CLIENT *cl) |
647 | { |
648 | struct cu_data *cu = (struct cu_data *) cl->cl_private; |
649 | |
650 | if (cu->cu_closeit) |
651 | { |
652 | (void) __close (cu->cu_sock); |
653 | } |
654 | XDR_DESTROY (&(cu->cu_outxdrs)); |
655 | mem_free ((caddr_t) cu, (sizeof (*cu) + cu->cu_sendsz + cu->cu_recvsz)); |
656 | mem_free ((caddr_t) cl, sizeof (CLIENT)); |
657 | } |
658 | |