blob: 0bb6709018de2a044c026bc92af86fb717b90209 [file] [log] [blame]
Chuck Levera5090502007-03-29 16:48:04 -04001/*
2 * In-kernel rpcbind client supporting versions 2, 3, and 4 of the rpcbind
3 * protocol
4 *
5 * Based on RFC 1833: "Binding Protocols for ONC RPC Version 2" and
6 * RFC 3530: "Network File System (NFS) version 4 Protocol"
7 *
8 * Original: Gilles Quillard, Bull Open Source, 2005 <gilles.quillard@bull.net>
9 * Updated: Chuck Lever, Oracle Corporation, 2007 <chuck.lever@oracle.com>
10 *
11 * Descended from net/sunrpc/pmap_clnt.c,
12 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
13 */
14
Chuck Levercce63cd2007-07-01 12:13:12 -040015#include <linux/module.h>
16
Chuck Levera5090502007-03-29 16:48:04 -040017#include <linux/types.h>
18#include <linux/socket.h>
Chuck Leverd5b64432007-08-06 11:57:18 -040019#include <linux/in.h>
20#include <linux/in6.h>
Chuck Levera5090502007-03-29 16:48:04 -040021#include <linux/kernel.h>
22#include <linux/errno.h>
23
24#include <linux/sunrpc/clnt.h>
25#include <linux/sunrpc/sched.h>
26
27#ifdef RPC_DEBUG
28# define RPCDBG_FACILITY RPCDBG_BIND
29#endif
30
31#define RPCBIND_PROGRAM (100000u)
32#define RPCBIND_PORT (111u)
33
34enum {
35 RPCBPROC_NULL,
36 RPCBPROC_SET,
37 RPCBPROC_UNSET,
38 RPCBPROC_GETPORT,
39 RPCBPROC_GETADDR = 3, /* alias for GETPORT */
40 RPCBPROC_DUMP,
41 RPCBPROC_CALLIT,
42 RPCBPROC_BCAST = 5, /* alias for CALLIT */
43 RPCBPROC_GETTIME,
44 RPCBPROC_UADDR2TADDR,
45 RPCBPROC_TADDR2UADDR,
46 RPCBPROC_GETVERSADDR,
47 RPCBPROC_INDIRECT,
48 RPCBPROC_GETADDRLIST,
49 RPCBPROC_GETSTAT,
50};
51
52#define RPCB_HIGHPROC_2 RPCBPROC_CALLIT
53#define RPCB_HIGHPROC_3 RPCBPROC_TADDR2UADDR
54#define RPCB_HIGHPROC_4 RPCBPROC_GETSTAT
55
56/*
57 * r_addr
58 *
59 * Quoting RFC 3530, section 2.2:
60 *
61 * For TCP over IPv4 and for UDP over IPv4, the format of r_addr is the
62 * US-ASCII string:
63 *
64 * h1.h2.h3.h4.p1.p2
65 *
66 * The prefix, "h1.h2.h3.h4", is the standard textual form for
67 * representing an IPv4 address, which is always four octets long.
68 * Assuming big-endian ordering, h1, h2, h3, and h4, are respectively,
69 * the first through fourth octets each converted to ASCII-decimal.
70 * Assuming big-endian ordering, p1 and p2 are, respectively, the first
71 * and second octets each converted to ASCII-decimal. For example, if a
72 * host, in big-endian order, has an address of 0x0A010307 and there is
73 * a service listening on, in big endian order, port 0x020F (decimal
74 * 527), then the complete universal address is "10.1.3.7.2.15".
75 *
76 * ...
77 *
78 * For TCP over IPv6 and for UDP over IPv6, the format of r_addr is the
79 * US-ASCII string:
80 *
81 * x1:x2:x3:x4:x5:x6:x7:x8.p1.p2
82 *
83 * The suffix "p1.p2" is the service port, and is computed the same way
84 * as with universal addresses for TCP and UDP over IPv4. The prefix,
85 * "x1:x2:x3:x4:x5:x6:x7:x8", is the standard textual form for
86 * representing an IPv6 address as defined in Section 2.2 of [RFC2373].
87 * Additionally, the two alternative forms specified in Section 2.2 of
88 * [RFC2373] are also acceptable.
89 *
90 * XXX: Currently this implementation does not explicitly convert the
91 * stored address to US-ASCII on non-ASCII systems.
92 */
93#define RPCB_MAXADDRLEN (128u)
94
95/*
96 * r_netid
97 *
98 * Quoting RFC 3530, section 2.2:
99 *
100 * For TCP over IPv4 the value of r_netid is the string "tcp". For UDP
101 * over IPv4 the value of r_netid is the string "udp".
102 *
103 * ...
104 *
105 * For TCP over IPv6 the value of r_netid is the string "tcp6". For UDP
106 * over IPv6 the value of r_netid is the string "udp6".
107 */
108#define RPCB_NETID_UDP "\165\144\160" /* "udp" */
109#define RPCB_NETID_TCP "\164\143\160" /* "tcp" */
110#define RPCB_NETID_UDP6 "\165\144\160\066" /* "udp6" */
111#define RPCB_NETID_TCP6 "\164\143\160\066" /* "tcp6" */
112
113#define RPCB_MAXNETIDLEN (4u)
114
115/*
116 * r_owner
117 *
118 * The "owner" is allowed to unset a service in the rpcbind database.
119 * We always use the following (arbitrary) fixed string.
120 */
121#define RPCB_OWNER_STRING "rpcb"
122#define RPCB_MAXOWNERLEN sizeof(RPCB_OWNER_STRING)
123
124static void rpcb_getport_done(struct rpc_task *, void *);
125extern struct rpc_program rpcb_program;
126
127struct rpcbind_args {
128 struct rpc_xprt * r_xprt;
129
130 u32 r_prog;
131 u32 r_vers;
132 u32 r_prot;
133 unsigned short r_port;
134 char * r_netid;
135 char r_addr[RPCB_MAXADDRLEN];
136 char * r_owner;
137};
138
139static struct rpc_procinfo rpcb_procedures2[];
140static struct rpc_procinfo rpcb_procedures3[];
141
Chuck Leverd5b64432007-08-06 11:57:18 -0400142struct rpcb_info {
Chuck Levera5090502007-03-29 16:48:04 -0400143 int rpc_vers;
144 struct rpc_procinfo * rpc_proc;
Chuck Leverd5b64432007-08-06 11:57:18 -0400145};
146
147static struct rpcb_info rpcb_next_version[];
148static struct rpcb_info rpcb_next_version6[];
Chuck Levera5090502007-03-29 16:48:04 -0400149
150static void rpcb_getport_prepare(struct rpc_task *task, void *calldata)
151{
152 struct rpcbind_args *map = calldata;
153 struct rpc_xprt *xprt = map->r_xprt;
154 struct rpc_message msg = {
155 .rpc_proc = rpcb_next_version[xprt->bind_index].rpc_proc,
156 .rpc_argp = map,
157 .rpc_resp = &map->r_port,
158 };
159
160 rpc_call_setup(task, &msg, 0);
161}
162
163static void rpcb_map_release(void *data)
164{
165 struct rpcbind_args *map = data;
166
167 xprt_put(map->r_xprt);
168 kfree(map);
169}
170
171static const struct rpc_call_ops rpcb_getport_ops = {
172 .rpc_call_prepare = rpcb_getport_prepare,
173 .rpc_call_done = rpcb_getport_done,
174 .rpc_release = rpcb_map_release,
175};
176
177static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status)
178{
179 xprt_clear_binding(xprt);
180 rpc_wake_up_status(&xprt->binding, status);
181}
182
183static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
184 int proto, int version, int privileged)
185{
186 struct rpc_create_args args = {
187 .protocol = proto,
188 .address = srvaddr,
189 .addrsize = sizeof(struct sockaddr_in),
190 .servername = hostname,
191 .program = &rpcb_program,
192 .version = version,
193 .authflavor = RPC_AUTH_UNIX,
Chuck Leverf7fb5582007-07-01 12:13:07 -0400194 .flags = (RPC_CLNT_CREATE_NOPING |
195 RPC_CLNT_CREATE_INTR),
Chuck Levera5090502007-03-29 16:48:04 -0400196 };
197
Chuck Leverd5b64432007-08-06 11:57:18 -0400198 switch (srvaddr->sa_family) {
199 case AF_INET:
200 ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT);
201 break;
202 case AF_INET6:
203 ((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT);
204 break;
205 default:
206 return NULL;
207 }
208
Chuck Levera5090502007-03-29 16:48:04 -0400209 if (!privileged)
210 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
211 return rpc_create(&args);
212}
213
214/**
215 * rpcb_register - set or unset a port registration with the local rpcbind svc
216 * @prog: RPC program number to bind
217 * @vers: RPC version number to bind
218 * @prot: transport protocol to use to make this request
219 * @port: port value to register
220 * @okay: result code
221 *
222 * port == 0 means unregister, port != 0 means register.
223 *
224 * This routine supports only rpcbind version 2.
225 */
226int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
227{
228 struct sockaddr_in sin = {
229 .sin_family = AF_INET,
230 .sin_addr.s_addr = htonl(INADDR_LOOPBACK),
231 };
232 struct rpcbind_args map = {
233 .r_prog = prog,
234 .r_vers = vers,
235 .r_prot = prot,
236 .r_port = port,
237 };
238 struct rpc_message msg = {
239 .rpc_proc = &rpcb_procedures2[port ?
240 RPCBPROC_SET : RPCBPROC_UNSET],
241 .rpc_argp = &map,
242 .rpc_resp = okay,
243 };
244 struct rpc_clnt *rpcb_clnt;
245 int error = 0;
246
247 dprintk("RPC: %sregistering (%u, %u, %d, %u) with local "
248 "rpcbind\n", (port ? "" : "un"),
249 prog, vers, prot, port);
250
251 rpcb_clnt = rpcb_create("localhost", (struct sockaddr *) &sin,
252 IPPROTO_UDP, 2, 1);
253 if (IS_ERR(rpcb_clnt))
254 return PTR_ERR(rpcb_clnt);
255
256 error = rpc_call_sync(rpcb_clnt, &msg, 0);
257
Trond Myklebust90c57552007-06-09 19:49:36 -0400258 rpc_shutdown_client(rpcb_clnt);
Chuck Levera5090502007-03-29 16:48:04 -0400259 if (error < 0)
260 printk(KERN_WARNING "RPC: failed to contact local rpcbind "
261 "server (errno %d).\n", -error);
262 dprintk("RPC: registration status %d/%d\n", error, *okay);
263
264 return error;
265}
266
Chuck Levera5090502007-03-29 16:48:04 -0400267/**
Chuck Levercce63cd2007-07-01 12:13:12 -0400268 * rpcb_getport_sync - obtain the port for an RPC service on a given host
Chuck Levera5090502007-03-29 16:48:04 -0400269 * @sin: address of remote peer
270 * @prog: RPC program number to bind
271 * @vers: RPC version number to bind
272 * @prot: transport protocol to use to make this request
273 *
274 * Called from outside the RPC client in a synchronous task context.
Chuck Levercce63cd2007-07-01 12:13:12 -0400275 * Uses default timeout parameters specified by underlying transport.
Chuck Levera5090502007-03-29 16:48:04 -0400276 *
Chuck Levercce63cd2007-07-01 12:13:12 -0400277 * XXX: Needs to support IPv6, and rpcbind versions 3 and 4
Chuck Levera5090502007-03-29 16:48:04 -0400278 */
Chuck Levercce63cd2007-07-01 12:13:12 -0400279int rpcb_getport_sync(struct sockaddr_in *sin, __u32 prog,
280 __u32 vers, int prot)
Chuck Levera5090502007-03-29 16:48:04 -0400281{
282 struct rpcbind_args map = {
283 .r_prog = prog,
284 .r_vers = vers,
285 .r_prot = prot,
286 .r_port = 0,
287 };
288 struct rpc_message msg = {
289 .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT],
290 .rpc_argp = &map,
291 .rpc_resp = &map.r_port,
292 };
293 struct rpc_clnt *rpcb_clnt;
294 char hostname[40];
295 int status;
296
Chuck Levercce63cd2007-07-01 12:13:12 -0400297 dprintk("RPC: %s(" NIPQUAD_FMT ", %u, %u, %d)\n",
298 __FUNCTION__, NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
Chuck Levera5090502007-03-29 16:48:04 -0400299
Chuck Levercce63cd2007-07-01 12:13:12 -0400300 sprintf(hostname, NIPQUAD_FMT, NIPQUAD(sin->sin_addr.s_addr));
Chuck Levera5090502007-03-29 16:48:04 -0400301 rpcb_clnt = rpcb_create(hostname, (struct sockaddr *)sin, prot, 2, 0);
302 if (IS_ERR(rpcb_clnt))
303 return PTR_ERR(rpcb_clnt);
304
305 status = rpc_call_sync(rpcb_clnt, &msg, 0);
Trond Myklebust90c57552007-06-09 19:49:36 -0400306 rpc_shutdown_client(rpcb_clnt);
Chuck Levera5090502007-03-29 16:48:04 -0400307
308 if (status >= 0) {
309 if (map.r_port != 0)
310 return map.r_port;
311 status = -EACCES;
312 }
313 return status;
314}
Chuck Levercce63cd2007-07-01 12:13:12 -0400315EXPORT_SYMBOL_GPL(rpcb_getport_sync);
Chuck Levera5090502007-03-29 16:48:04 -0400316
317/**
Chuck Lever45160d62007-07-01 12:13:17 -0400318 * rpcb_getport_async - obtain the port for a given RPC service on a given host
Chuck Levera5090502007-03-29 16:48:04 -0400319 * @task: task that is waiting for portmapper request
320 *
321 * This one can be called for an ongoing RPC request, and can be used in
322 * an async (rpciod) context.
323 */
Chuck Lever45160d62007-07-01 12:13:17 -0400324void rpcb_getport_async(struct rpc_task *task)
Chuck Levera5090502007-03-29 16:48:04 -0400325{
326 struct rpc_clnt *clnt = task->tk_client;
327 int bind_version;
328 struct rpc_xprt *xprt = task->tk_xprt;
329 struct rpc_clnt *rpcb_clnt;
330 static struct rpcbind_args *map;
331 struct rpc_task *child;
332 struct sockaddr addr;
333 int status;
Chuck Leverd5b64432007-08-06 11:57:18 -0400334 struct rpcb_info *info;
Chuck Levera5090502007-03-29 16:48:04 -0400335
Chuck Lever45160d62007-07-01 12:13:17 -0400336 dprintk("RPC: %5u %s(%s, %u, %u, %d)\n",
337 task->tk_pid, __FUNCTION__,
338 clnt->cl_server, clnt->cl_prog, clnt->cl_vers, xprt->prot);
Chuck Levera5090502007-03-29 16:48:04 -0400339
340 /* Autobind on cloned rpc clients is discouraged */
341 BUG_ON(clnt->cl_parent != clnt);
342
343 if (xprt_test_and_set_binding(xprt)) {
344 status = -EACCES; /* tell caller to check again */
Chuck Lever45160d62007-07-01 12:13:17 -0400345 dprintk("RPC: %5u %s: waiting for another binder\n",
346 task->tk_pid, __FUNCTION__);
Chuck Levera5090502007-03-29 16:48:04 -0400347 goto bailout_nowake;
348 }
349
350 /* Put self on queue before sending rpcbind request, in case
351 * rpcb_getport_done completes before we return from rpc_run_task */
352 rpc_sleep_on(&xprt->binding, task, NULL, NULL);
353
354 /* Someone else may have bound if we slept */
355 if (xprt_bound(xprt)) {
356 status = 0;
Chuck Lever45160d62007-07-01 12:13:17 -0400357 dprintk("RPC: %5u %s: already bound\n",
358 task->tk_pid, __FUNCTION__);
Chuck Levera5090502007-03-29 16:48:04 -0400359 goto bailout_nofree;
360 }
361
Chuck Leverd5b64432007-08-06 11:57:18 -0400362 rpc_peeraddr(clnt, (void *)&addr, sizeof(addr));
363
364 /* Don't ever use rpcbind v2 for AF_INET6 requests */
365 switch (addr.sa_family) {
366 case AF_INET:
367 info = rpcb_next_version;
368 break;
369 case AF_INET6:
370 info = rpcb_next_version6;
371 break;
372 default:
373 status = -EAFNOSUPPORT;
374 dprintk("RPC: %5u %s: bad address family\n",
375 task->tk_pid, __FUNCTION__);
376 goto bailout_nofree;
377 }
378 if (info[xprt->bind_index].rpc_proc == NULL) {
Chuck Levera5090502007-03-29 16:48:04 -0400379 xprt->bind_index = 0;
380 status = -EACCES; /* tell caller to try again later */
Chuck Lever45160d62007-07-01 12:13:17 -0400381 dprintk("RPC: %5u %s: no more getport versions available\n",
382 task->tk_pid, __FUNCTION__);
Chuck Levera5090502007-03-29 16:48:04 -0400383 goto bailout_nofree;
384 }
Chuck Leverd5b64432007-08-06 11:57:18 -0400385 bind_version = info[xprt->bind_index].rpc_vers;
Chuck Levera5090502007-03-29 16:48:04 -0400386
Chuck Lever45160d62007-07-01 12:13:17 -0400387 dprintk("RPC: %5u %s: trying rpcbind version %u\n",
388 task->tk_pid, __FUNCTION__, bind_version);
Chuck Levera5090502007-03-29 16:48:04 -0400389
Chuck Lever143b6c42007-08-16 16:03:31 -0400390 rpcb_clnt = rpcb_create(clnt->cl_server, &addr, xprt->prot,
391 bind_version, 0);
392 if (IS_ERR(rpcb_clnt)) {
393 status = PTR_ERR(rpcb_clnt);
394 dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n",
395 task->tk_pid, __FUNCTION__, PTR_ERR(rpcb_clnt));
396 goto bailout_nofree;
397 }
398
Chuck Levera5090502007-03-29 16:48:04 -0400399 map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC);
400 if (!map) {
401 status = -ENOMEM;
Chuck Lever45160d62007-07-01 12:13:17 -0400402 dprintk("RPC: %5u %s: no memory available\n",
403 task->tk_pid, __FUNCTION__);
Chuck Levera5090502007-03-29 16:48:04 -0400404 goto bailout_nofree;
405 }
406 map->r_prog = clnt->cl_prog;
407 map->r_vers = clnt->cl_vers;
408 map->r_prot = xprt->prot;
409 map->r_port = 0;
410 map->r_xprt = xprt_get(xprt);
411 map->r_netid = (xprt->prot == IPPROTO_TCP) ? RPCB_NETID_TCP :
412 RPCB_NETID_UDP;
Chuck Lever143b6c42007-08-16 16:03:31 -0400413 memcpy(&map->r_addr,
414 rpc_peeraddr2str(rpcb_clnt, RPC_DISPLAY_UNIVERSAL_ADDR),
415 sizeof(map->r_addr));
Chuck Levera5090502007-03-29 16:48:04 -0400416 map->r_owner = RPCB_OWNER_STRING; /* ignored for GETADDR */
417
Chuck Levera5090502007-03-29 16:48:04 -0400418 child = rpc_run_task(rpcb_clnt, RPC_TASK_ASYNC, &rpcb_getport_ops, map);
Trond Myklebust4c402b42007-06-14 16:40:32 -0400419 rpc_release_client(rpcb_clnt);
Chuck Levera5090502007-03-29 16:48:04 -0400420 if (IS_ERR(child)) {
421 status = -EIO;
Chuck Lever45160d62007-07-01 12:13:17 -0400422 dprintk("RPC: %5u %s: rpc_run_task failed\n",
423 task->tk_pid, __FUNCTION__);
Chuck Lever143b6c42007-08-16 16:03:31 -0400424 goto bailout;
Chuck Levera5090502007-03-29 16:48:04 -0400425 }
426 rpc_put_task(child);
427
428 task->tk_xprt->stat.bind_count++;
429 return;
430
431bailout:
432 kfree(map);
433 xprt_put(xprt);
434bailout_nofree:
435 rpcb_wake_rpcbind_waiters(xprt, status);
436bailout_nowake:
437 task->tk_status = status;
438}
439
440/*
441 * Rpcbind child task calls this callback via tk_exit.
442 */
443static void rpcb_getport_done(struct rpc_task *child, void *data)
444{
445 struct rpcbind_args *map = data;
446 struct rpc_xprt *xprt = map->r_xprt;
447 int status = child->tk_status;
448
449 /* rpcbind server doesn't support this rpcbind protocol version */
450 if (status == -EPROTONOSUPPORT)
451 xprt->bind_index++;
452
453 if (status < 0) {
454 /* rpcbind server not available on remote host? */
455 xprt->ops->set_port(xprt, 0);
456 } else if (map->r_port == 0) {
457 /* Requested RPC service wasn't registered on remote host */
458 xprt->ops->set_port(xprt, 0);
459 status = -EACCES;
460 } else {
461 /* Succeeded */
462 xprt->ops->set_port(xprt, map->r_port);
463 xprt_set_bound(xprt);
464 status = 0;
465 }
466
467 dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n",
468 child->tk_pid, status, map->r_port);
469
470 rpcb_wake_rpcbind_waiters(xprt, status);
471}
472
473static int rpcb_encode_mapping(struct rpc_rqst *req, __be32 *p,
474 struct rpcbind_args *rpcb)
475{
476 dprintk("RPC: rpcb_encode_mapping(%u, %u, %d, %u)\n",
477 rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port);
478 *p++ = htonl(rpcb->r_prog);
479 *p++ = htonl(rpcb->r_vers);
480 *p++ = htonl(rpcb->r_prot);
481 *p++ = htonl(rpcb->r_port);
482
483 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
484 return 0;
485}
486
487static int rpcb_decode_getport(struct rpc_rqst *req, __be32 *p,
488 unsigned short *portp)
489{
490 *portp = (unsigned short) ntohl(*p++);
491 dprintk("RPC: rpcb_decode_getport result %u\n",
492 *portp);
493 return 0;
494}
495
496static int rpcb_decode_set(struct rpc_rqst *req, __be32 *p,
497 unsigned int *boolp)
498{
499 *boolp = (unsigned int) ntohl(*p++);
500 dprintk("RPC: rpcb_decode_set result %u\n",
501 *boolp);
502 return 0;
503}
504
505static int rpcb_encode_getaddr(struct rpc_rqst *req, __be32 *p,
506 struct rpcbind_args *rpcb)
507{
508 dprintk("RPC: rpcb_encode_getaddr(%u, %u, %s)\n",
509 rpcb->r_prog, rpcb->r_vers, rpcb->r_addr);
510 *p++ = htonl(rpcb->r_prog);
511 *p++ = htonl(rpcb->r_vers);
512
513 p = xdr_encode_string(p, rpcb->r_netid);
514 p = xdr_encode_string(p, rpcb->r_addr);
515 p = xdr_encode_string(p, rpcb->r_owner);
516
517 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
518
519 return 0;
520}
521
522static int rpcb_decode_getaddr(struct rpc_rqst *req, __be32 *p,
523 unsigned short *portp)
524{
525 char *addr;
Chuck Leveradc24df2007-08-06 11:56:31 -0400526 u32 addr_len;
527 int c, i, f, first, val;
Chuck Levera5090502007-03-29 16:48:04 -0400528
529 *portp = 0;
Chuck Leveradc24df2007-08-06 11:56:31 -0400530 addr_len = ntohl(*p++);
Chuck Levera5090502007-03-29 16:48:04 -0400531 if (addr_len > RPCB_MAXADDRLEN) /* sanity */
532 return -EINVAL;
533
534 dprintk("RPC: rpcb_decode_getaddr returned string: '%s'\n",
535 (char *) p);
536
537 addr = (char *)p;
538 val = 0;
539 first = 1;
540 f = 1;
541 for (i = addr_len - 1; i > 0; i--) {
542 c = addr[i];
543 if (c >= '0' && c <= '9') {
544 val += (c - '0') * f;
545 f *= 10;
546 } else if (c == '.') {
547 if (first) {
548 *portp = val;
549 val = first = 0;
550 f = 1;
551 } else {
552 *portp |= (val << 8);
553 break;
554 }
555 }
556 }
557
558 dprintk("RPC: rpcb_decode_getaddr port=%u\n", *portp);
559 return 0;
560}
561
562#define RPCB_program_sz (1u)
563#define RPCB_version_sz (1u)
564#define RPCB_protocol_sz (1u)
565#define RPCB_port_sz (1u)
566#define RPCB_boolean_sz (1u)
567
568#define RPCB_netid_sz (1+XDR_QUADLEN(RPCB_MAXNETIDLEN))
569#define RPCB_addr_sz (1+XDR_QUADLEN(RPCB_MAXADDRLEN))
570#define RPCB_ownerstring_sz (1+XDR_QUADLEN(RPCB_MAXOWNERLEN))
571
572#define RPCB_mappingargs_sz RPCB_program_sz+RPCB_version_sz+ \
573 RPCB_protocol_sz+RPCB_port_sz
574#define RPCB_getaddrargs_sz RPCB_program_sz+RPCB_version_sz+ \
575 RPCB_netid_sz+RPCB_addr_sz+ \
576 RPCB_ownerstring_sz
577
578#define RPCB_setres_sz RPCB_boolean_sz
579#define RPCB_getportres_sz RPCB_port_sz
580
581/*
582 * Note that RFC 1833 does not put any size restrictions on the
583 * address string returned by the remote rpcbind database.
584 */
585#define RPCB_getaddrres_sz RPCB_addr_sz
586
587#define PROC(proc, argtype, restype) \
588 [RPCBPROC_##proc] = { \
589 .p_proc = RPCBPROC_##proc, \
590 .p_encode = (kxdrproc_t) rpcb_encode_##argtype, \
591 .p_decode = (kxdrproc_t) rpcb_decode_##restype, \
592 .p_arglen = RPCB_##argtype##args_sz, \
593 .p_replen = RPCB_##restype##res_sz, \
594 .p_statidx = RPCBPROC_##proc, \
595 .p_timer = 0, \
596 .p_name = #proc, \
597 }
598
599/*
600 * Not all rpcbind procedures described in RFC 1833 are implemented
601 * since the Linux kernel RPC code requires only these.
602 */
603static struct rpc_procinfo rpcb_procedures2[] = {
604 PROC(SET, mapping, set),
605 PROC(UNSET, mapping, set),
606 PROC(GETADDR, mapping, getport),
607};
608
609static struct rpc_procinfo rpcb_procedures3[] = {
610 PROC(SET, mapping, set),
611 PROC(UNSET, mapping, set),
612 PROC(GETADDR, getaddr, getaddr),
613};
614
615static struct rpc_procinfo rpcb_procedures4[] = {
616 PROC(SET, mapping, set),
617 PROC(UNSET, mapping, set),
618 PROC(GETVERSADDR, getaddr, getaddr),
619};
620
621static struct rpcb_info rpcb_next_version[] = {
622#ifdef CONFIG_SUNRPC_BIND34
623 { 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
624 { 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
625#endif
626 { 2, &rpcb_procedures2[RPCBPROC_GETPORT] },
627 { 0, NULL },
628};
629
Chuck Leverd5b64432007-08-06 11:57:18 -0400630static struct rpcb_info rpcb_next_version6[] = {
631#ifdef CONFIG_SUNRPC_BIND34
632 { 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
633 { 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
634#endif
635 { 0, NULL },
636};
637
Chuck Levera5090502007-03-29 16:48:04 -0400638static struct rpc_version rpcb_version2 = {
639 .number = 2,
640 .nrprocs = RPCB_HIGHPROC_2,
641 .procs = rpcb_procedures2
642};
643
644static struct rpc_version rpcb_version3 = {
645 .number = 3,
646 .nrprocs = RPCB_HIGHPROC_3,
647 .procs = rpcb_procedures3
648};
649
650static struct rpc_version rpcb_version4 = {
651 .number = 4,
652 .nrprocs = RPCB_HIGHPROC_4,
653 .procs = rpcb_procedures4
654};
655
656static struct rpc_version *rpcb_version[] = {
657 NULL,
658 NULL,
659 &rpcb_version2,
660 &rpcb_version3,
661 &rpcb_version4
662};
663
664static struct rpc_stat rpcb_stats;
665
666struct rpc_program rpcb_program = {
667 .name = "rpcbind",
668 .number = RPCBIND_PROGRAM,
669 .nrvers = ARRAY_SIZE(rpcb_version),
670 .version = rpcb_version,
671 .stats = &rpcb_stats,
672};