Commit | Line | Data |
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a509050b CL |
1 | /* |
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 | ||
cce63cd6 CL |
15 | #include <linux/module.h> |
16 | ||
a509050b CL |
17 | #include <linux/types.h> |
18 | #include <linux/socket.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/errno.h> | |
21 | ||
22 | #include <linux/sunrpc/clnt.h> | |
23 | #include <linux/sunrpc/sched.h> | |
24 | ||
25 | #ifdef RPC_DEBUG | |
26 | # define RPCDBG_FACILITY RPCDBG_BIND | |
27 | #endif | |
28 | ||
29 | #define RPCBIND_PROGRAM (100000u) | |
30 | #define RPCBIND_PORT (111u) | |
31 | ||
32 | enum { | |
33 | RPCBPROC_NULL, | |
34 | RPCBPROC_SET, | |
35 | RPCBPROC_UNSET, | |
36 | RPCBPROC_GETPORT, | |
37 | RPCBPROC_GETADDR = 3, /* alias for GETPORT */ | |
38 | RPCBPROC_DUMP, | |
39 | RPCBPROC_CALLIT, | |
40 | RPCBPROC_BCAST = 5, /* alias for CALLIT */ | |
41 | RPCBPROC_GETTIME, | |
42 | RPCBPROC_UADDR2TADDR, | |
43 | RPCBPROC_TADDR2UADDR, | |
44 | RPCBPROC_GETVERSADDR, | |
45 | RPCBPROC_INDIRECT, | |
46 | RPCBPROC_GETADDRLIST, | |
47 | RPCBPROC_GETSTAT, | |
48 | }; | |
49 | ||
50 | #define RPCB_HIGHPROC_2 RPCBPROC_CALLIT | |
51 | #define RPCB_HIGHPROC_3 RPCBPROC_TADDR2UADDR | |
52 | #define RPCB_HIGHPROC_4 RPCBPROC_GETSTAT | |
53 | ||
54 | /* | |
55 | * r_addr | |
56 | * | |
57 | * Quoting RFC 3530, section 2.2: | |
58 | * | |
59 | * For TCP over IPv4 and for UDP over IPv4, the format of r_addr is the | |
60 | * US-ASCII string: | |
61 | * | |
62 | * h1.h2.h3.h4.p1.p2 | |
63 | * | |
64 | * The prefix, "h1.h2.h3.h4", is the standard textual form for | |
65 | * representing an IPv4 address, which is always four octets long. | |
66 | * Assuming big-endian ordering, h1, h2, h3, and h4, are respectively, | |
67 | * the first through fourth octets each converted to ASCII-decimal. | |
68 | * Assuming big-endian ordering, p1 and p2 are, respectively, the first | |
69 | * and second octets each converted to ASCII-decimal. For example, if a | |
70 | * host, in big-endian order, has an address of 0x0A010307 and there is | |
71 | * a service listening on, in big endian order, port 0x020F (decimal | |
72 | * 527), then the complete universal address is "10.1.3.7.2.15". | |
73 | * | |
74 | * ... | |
75 | * | |
76 | * For TCP over IPv6 and for UDP over IPv6, the format of r_addr is the | |
77 | * US-ASCII string: | |
78 | * | |
79 | * x1:x2:x3:x4:x5:x6:x7:x8.p1.p2 | |
80 | * | |
81 | * The suffix "p1.p2" is the service port, and is computed the same way | |
82 | * as with universal addresses for TCP and UDP over IPv4. The prefix, | |
83 | * "x1:x2:x3:x4:x5:x6:x7:x8", is the standard textual form for | |
84 | * representing an IPv6 address as defined in Section 2.2 of [RFC2373]. | |
85 | * Additionally, the two alternative forms specified in Section 2.2 of | |
86 | * [RFC2373] are also acceptable. | |
87 | * | |
88 | * XXX: Currently this implementation does not explicitly convert the | |
89 | * stored address to US-ASCII on non-ASCII systems. | |
90 | */ | |
91 | #define RPCB_MAXADDRLEN (128u) | |
92 | ||
93 | /* | |
94 | * r_netid | |
95 | * | |
96 | * Quoting RFC 3530, section 2.2: | |
97 | * | |
98 | * For TCP over IPv4 the value of r_netid is the string "tcp". For UDP | |
99 | * over IPv4 the value of r_netid is the string "udp". | |
100 | * | |
101 | * ... | |
102 | * | |
103 | * For TCP over IPv6 the value of r_netid is the string "tcp6". For UDP | |
104 | * over IPv6 the value of r_netid is the string "udp6". | |
105 | */ | |
106 | #define RPCB_NETID_UDP "\165\144\160" /* "udp" */ | |
107 | #define RPCB_NETID_TCP "\164\143\160" /* "tcp" */ | |
108 | #define RPCB_NETID_UDP6 "\165\144\160\066" /* "udp6" */ | |
109 | #define RPCB_NETID_TCP6 "\164\143\160\066" /* "tcp6" */ | |
110 | ||
111 | #define RPCB_MAXNETIDLEN (4u) | |
112 | ||
113 | /* | |
114 | * r_owner | |
115 | * | |
116 | * The "owner" is allowed to unset a service in the rpcbind database. | |
117 | * We always use the following (arbitrary) fixed string. | |
118 | */ | |
119 | #define RPCB_OWNER_STRING "rpcb" | |
120 | #define RPCB_MAXOWNERLEN sizeof(RPCB_OWNER_STRING) | |
121 | ||
122 | static void rpcb_getport_done(struct rpc_task *, void *); | |
123 | extern struct rpc_program rpcb_program; | |
124 | ||
125 | struct rpcbind_args { | |
126 | struct rpc_xprt * r_xprt; | |
127 | ||
128 | u32 r_prog; | |
129 | u32 r_vers; | |
130 | u32 r_prot; | |
131 | unsigned short r_port; | |
132 | char * r_netid; | |
133 | char r_addr[RPCB_MAXADDRLEN]; | |
134 | char * r_owner; | |
135 | }; | |
136 | ||
137 | static struct rpc_procinfo rpcb_procedures2[]; | |
138 | static struct rpc_procinfo rpcb_procedures3[]; | |
139 | ||
140 | static struct rpcb_info { | |
141 | int rpc_vers; | |
142 | struct rpc_procinfo * rpc_proc; | |
143 | } rpcb_next_version[]; | |
144 | ||
145 | static void rpcb_getport_prepare(struct rpc_task *task, void *calldata) | |
146 | { | |
147 | struct rpcbind_args *map = calldata; | |
148 | struct rpc_xprt *xprt = map->r_xprt; | |
149 | struct rpc_message msg = { | |
150 | .rpc_proc = rpcb_next_version[xprt->bind_index].rpc_proc, | |
151 | .rpc_argp = map, | |
152 | .rpc_resp = &map->r_port, | |
153 | }; | |
154 | ||
155 | rpc_call_setup(task, &msg, 0); | |
156 | } | |
157 | ||
158 | static void rpcb_map_release(void *data) | |
159 | { | |
160 | struct rpcbind_args *map = data; | |
161 | ||
162 | xprt_put(map->r_xprt); | |
163 | kfree(map); | |
164 | } | |
165 | ||
166 | static const struct rpc_call_ops rpcb_getport_ops = { | |
167 | .rpc_call_prepare = rpcb_getport_prepare, | |
168 | .rpc_call_done = rpcb_getport_done, | |
169 | .rpc_release = rpcb_map_release, | |
170 | }; | |
171 | ||
172 | static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status) | |
173 | { | |
174 | xprt_clear_binding(xprt); | |
175 | rpc_wake_up_status(&xprt->binding, status); | |
176 | } | |
177 | ||
178 | static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr, | |
179 | int proto, int version, int privileged) | |
180 | { | |
181 | struct rpc_create_args args = { | |
182 | .protocol = proto, | |
183 | .address = srvaddr, | |
184 | .addrsize = sizeof(struct sockaddr_in), | |
185 | .servername = hostname, | |
186 | .program = &rpcb_program, | |
187 | .version = version, | |
188 | .authflavor = RPC_AUTH_UNIX, | |
f7fb558e CL |
189 | .flags = (RPC_CLNT_CREATE_NOPING | |
190 | RPC_CLNT_CREATE_INTR), | |
a509050b CL |
191 | }; |
192 | ||
193 | ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT); | |
194 | if (!privileged) | |
195 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; | |
196 | return rpc_create(&args); | |
197 | } | |
198 | ||
199 | /** | |
200 | * rpcb_register - set or unset a port registration with the local rpcbind svc | |
201 | * @prog: RPC program number to bind | |
202 | * @vers: RPC version number to bind | |
203 | * @prot: transport protocol to use to make this request | |
204 | * @port: port value to register | |
205 | * @okay: result code | |
206 | * | |
207 | * port == 0 means unregister, port != 0 means register. | |
208 | * | |
209 | * This routine supports only rpcbind version 2. | |
210 | */ | |
211 | int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay) | |
212 | { | |
213 | struct sockaddr_in sin = { | |
214 | .sin_family = AF_INET, | |
215 | .sin_addr.s_addr = htonl(INADDR_LOOPBACK), | |
216 | }; | |
217 | struct rpcbind_args map = { | |
218 | .r_prog = prog, | |
219 | .r_vers = vers, | |
220 | .r_prot = prot, | |
221 | .r_port = port, | |
222 | }; | |
223 | struct rpc_message msg = { | |
224 | .rpc_proc = &rpcb_procedures2[port ? | |
225 | RPCBPROC_SET : RPCBPROC_UNSET], | |
226 | .rpc_argp = &map, | |
227 | .rpc_resp = okay, | |
228 | }; | |
229 | struct rpc_clnt *rpcb_clnt; | |
230 | int error = 0; | |
231 | ||
232 | dprintk("RPC: %sregistering (%u, %u, %d, %u) with local " | |
233 | "rpcbind\n", (port ? "" : "un"), | |
234 | prog, vers, prot, port); | |
235 | ||
236 | rpcb_clnt = rpcb_create("localhost", (struct sockaddr *) &sin, | |
237 | IPPROTO_UDP, 2, 1); | |
238 | if (IS_ERR(rpcb_clnt)) | |
239 | return PTR_ERR(rpcb_clnt); | |
240 | ||
241 | error = rpc_call_sync(rpcb_clnt, &msg, 0); | |
242 | ||
90c5755f | 243 | rpc_shutdown_client(rpcb_clnt); |
a509050b CL |
244 | if (error < 0) |
245 | printk(KERN_WARNING "RPC: failed to contact local rpcbind " | |
246 | "server (errno %d).\n", -error); | |
247 | dprintk("RPC: registration status %d/%d\n", error, *okay); | |
248 | ||
249 | return error; | |
250 | } | |
251 | ||
a509050b | 252 | /** |
cce63cd6 | 253 | * rpcb_getport_sync - obtain the port for an RPC service on a given host |
a509050b CL |
254 | * @sin: address of remote peer |
255 | * @prog: RPC program number to bind | |
256 | * @vers: RPC version number to bind | |
257 | * @prot: transport protocol to use to make this request | |
258 | * | |
259 | * Called from outside the RPC client in a synchronous task context. | |
cce63cd6 | 260 | * Uses default timeout parameters specified by underlying transport. |
a509050b | 261 | * |
cce63cd6 | 262 | * XXX: Needs to support IPv6, and rpcbind versions 3 and 4 |
a509050b | 263 | */ |
cce63cd6 CL |
264 | int rpcb_getport_sync(struct sockaddr_in *sin, __u32 prog, |
265 | __u32 vers, int prot) | |
a509050b CL |
266 | { |
267 | struct rpcbind_args map = { | |
268 | .r_prog = prog, | |
269 | .r_vers = vers, | |
270 | .r_prot = prot, | |
271 | .r_port = 0, | |
272 | }; | |
273 | struct rpc_message msg = { | |
274 | .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT], | |
275 | .rpc_argp = &map, | |
276 | .rpc_resp = &map.r_port, | |
277 | }; | |
278 | struct rpc_clnt *rpcb_clnt; | |
279 | char hostname[40]; | |
280 | int status; | |
281 | ||
cce63cd6 CL |
282 | dprintk("RPC: %s(" NIPQUAD_FMT ", %u, %u, %d)\n", |
283 | __FUNCTION__, NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot); | |
a509050b | 284 | |
cce63cd6 | 285 | sprintf(hostname, NIPQUAD_FMT, NIPQUAD(sin->sin_addr.s_addr)); |
a509050b CL |
286 | rpcb_clnt = rpcb_create(hostname, (struct sockaddr *)sin, prot, 2, 0); |
287 | if (IS_ERR(rpcb_clnt)) | |
288 | return PTR_ERR(rpcb_clnt); | |
289 | ||
290 | status = rpc_call_sync(rpcb_clnt, &msg, 0); | |
90c5755f | 291 | rpc_shutdown_client(rpcb_clnt); |
a509050b CL |
292 | |
293 | if (status >= 0) { | |
294 | if (map.r_port != 0) | |
295 | return map.r_port; | |
296 | status = -EACCES; | |
297 | } | |
298 | return status; | |
299 | } | |
cce63cd6 | 300 | EXPORT_SYMBOL_GPL(rpcb_getport_sync); |
a509050b CL |
301 | |
302 | /** | |
45160d62 | 303 | * rpcb_getport_async - obtain the port for a given RPC service on a given host |
a509050b CL |
304 | * @task: task that is waiting for portmapper request |
305 | * | |
306 | * This one can be called for an ongoing RPC request, and can be used in | |
307 | * an async (rpciod) context. | |
308 | */ | |
45160d62 | 309 | void rpcb_getport_async(struct rpc_task *task) |
a509050b CL |
310 | { |
311 | struct rpc_clnt *clnt = task->tk_client; | |
312 | int bind_version; | |
313 | struct rpc_xprt *xprt = task->tk_xprt; | |
314 | struct rpc_clnt *rpcb_clnt; | |
315 | static struct rpcbind_args *map; | |
316 | struct rpc_task *child; | |
317 | struct sockaddr addr; | |
318 | int status; | |
319 | ||
45160d62 CL |
320 | dprintk("RPC: %5u %s(%s, %u, %u, %d)\n", |
321 | task->tk_pid, __FUNCTION__, | |
322 | clnt->cl_server, clnt->cl_prog, clnt->cl_vers, xprt->prot); | |
a509050b CL |
323 | |
324 | /* Autobind on cloned rpc clients is discouraged */ | |
325 | BUG_ON(clnt->cl_parent != clnt); | |
326 | ||
327 | if (xprt_test_and_set_binding(xprt)) { | |
328 | status = -EACCES; /* tell caller to check again */ | |
45160d62 CL |
329 | dprintk("RPC: %5u %s: waiting for another binder\n", |
330 | task->tk_pid, __FUNCTION__); | |
a509050b CL |
331 | goto bailout_nowake; |
332 | } | |
333 | ||
334 | /* Put self on queue before sending rpcbind request, in case | |
335 | * rpcb_getport_done completes before we return from rpc_run_task */ | |
336 | rpc_sleep_on(&xprt->binding, task, NULL, NULL); | |
337 | ||
338 | /* Someone else may have bound if we slept */ | |
339 | if (xprt_bound(xprt)) { | |
340 | status = 0; | |
45160d62 CL |
341 | dprintk("RPC: %5u %s: already bound\n", |
342 | task->tk_pid, __FUNCTION__); | |
a509050b CL |
343 | goto bailout_nofree; |
344 | } | |
345 | ||
346 | if (rpcb_next_version[xprt->bind_index].rpc_proc == NULL) { | |
347 | xprt->bind_index = 0; | |
348 | status = -EACCES; /* tell caller to try again later */ | |
45160d62 CL |
349 | dprintk("RPC: %5u %s: no more getport versions available\n", |
350 | task->tk_pid, __FUNCTION__); | |
a509050b CL |
351 | goto bailout_nofree; |
352 | } | |
353 | bind_version = rpcb_next_version[xprt->bind_index].rpc_vers; | |
354 | ||
45160d62 CL |
355 | dprintk("RPC: %5u %s: trying rpcbind version %u\n", |
356 | task->tk_pid, __FUNCTION__, bind_version); | |
a509050b CL |
357 | |
358 | map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC); | |
359 | if (!map) { | |
360 | status = -ENOMEM; | |
45160d62 CL |
361 | dprintk("RPC: %5u %s: no memory available\n", |
362 | task->tk_pid, __FUNCTION__); | |
a509050b CL |
363 | goto bailout_nofree; |
364 | } | |
365 | map->r_prog = clnt->cl_prog; | |
366 | map->r_vers = clnt->cl_vers; | |
367 | map->r_prot = xprt->prot; | |
368 | map->r_port = 0; | |
369 | map->r_xprt = xprt_get(xprt); | |
370 | map->r_netid = (xprt->prot == IPPROTO_TCP) ? RPCB_NETID_TCP : | |
371 | RPCB_NETID_UDP; | |
372 | memcpy(&map->r_addr, rpc_peeraddr2str(clnt, RPC_DISPLAY_ADDR), | |
373 | sizeof(map->r_addr)); | |
374 | map->r_owner = RPCB_OWNER_STRING; /* ignored for GETADDR */ | |
375 | ||
376 | rpc_peeraddr(clnt, (void *)&addr, sizeof(addr)); | |
377 | rpcb_clnt = rpcb_create(clnt->cl_server, &addr, xprt->prot, bind_version, 0); | |
378 | if (IS_ERR(rpcb_clnt)) { | |
379 | status = PTR_ERR(rpcb_clnt); | |
45160d62 CL |
380 | dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n", |
381 | task->tk_pid, __FUNCTION__, PTR_ERR(rpcb_clnt)); | |
a509050b CL |
382 | goto bailout; |
383 | } | |
384 | ||
385 | child = rpc_run_task(rpcb_clnt, RPC_TASK_ASYNC, &rpcb_getport_ops, map); | |
4c402b40 | 386 | rpc_release_client(rpcb_clnt); |
a509050b CL |
387 | if (IS_ERR(child)) { |
388 | status = -EIO; | |
45160d62 CL |
389 | dprintk("RPC: %5u %s: rpc_run_task failed\n", |
390 | task->tk_pid, __FUNCTION__); | |
a509050b CL |
391 | goto bailout_nofree; |
392 | } | |
393 | rpc_put_task(child); | |
394 | ||
395 | task->tk_xprt->stat.bind_count++; | |
396 | return; | |
397 | ||
398 | bailout: | |
399 | kfree(map); | |
400 | xprt_put(xprt); | |
401 | bailout_nofree: | |
402 | rpcb_wake_rpcbind_waiters(xprt, status); | |
403 | bailout_nowake: | |
404 | task->tk_status = status; | |
405 | } | |
406 | ||
407 | /* | |
408 | * Rpcbind child task calls this callback via tk_exit. | |
409 | */ | |
410 | static void rpcb_getport_done(struct rpc_task *child, void *data) | |
411 | { | |
412 | struct rpcbind_args *map = data; | |
413 | struct rpc_xprt *xprt = map->r_xprt; | |
414 | int status = child->tk_status; | |
415 | ||
416 | /* rpcbind server doesn't support this rpcbind protocol version */ | |
417 | if (status == -EPROTONOSUPPORT) | |
418 | xprt->bind_index++; | |
419 | ||
420 | if (status < 0) { | |
421 | /* rpcbind server not available on remote host? */ | |
422 | xprt->ops->set_port(xprt, 0); | |
423 | } else if (map->r_port == 0) { | |
424 | /* Requested RPC service wasn't registered on remote host */ | |
425 | xprt->ops->set_port(xprt, 0); | |
426 | status = -EACCES; | |
427 | } else { | |
428 | /* Succeeded */ | |
429 | xprt->ops->set_port(xprt, map->r_port); | |
430 | xprt_set_bound(xprt); | |
431 | status = 0; | |
432 | } | |
433 | ||
434 | dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n", | |
435 | child->tk_pid, status, map->r_port); | |
436 | ||
437 | rpcb_wake_rpcbind_waiters(xprt, status); | |
438 | } | |
439 | ||
440 | static int rpcb_encode_mapping(struct rpc_rqst *req, __be32 *p, | |
441 | struct rpcbind_args *rpcb) | |
442 | { | |
443 | dprintk("RPC: rpcb_encode_mapping(%u, %u, %d, %u)\n", | |
444 | rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port); | |
445 | *p++ = htonl(rpcb->r_prog); | |
446 | *p++ = htonl(rpcb->r_vers); | |
447 | *p++ = htonl(rpcb->r_prot); | |
448 | *p++ = htonl(rpcb->r_port); | |
449 | ||
450 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); | |
451 | return 0; | |
452 | } | |
453 | ||
454 | static int rpcb_decode_getport(struct rpc_rqst *req, __be32 *p, | |
455 | unsigned short *portp) | |
456 | { | |
457 | *portp = (unsigned short) ntohl(*p++); | |
458 | dprintk("RPC: rpcb_decode_getport result %u\n", | |
459 | *portp); | |
460 | return 0; | |
461 | } | |
462 | ||
463 | static int rpcb_decode_set(struct rpc_rqst *req, __be32 *p, | |
464 | unsigned int *boolp) | |
465 | { | |
466 | *boolp = (unsigned int) ntohl(*p++); | |
467 | dprintk("RPC: rpcb_decode_set result %u\n", | |
468 | *boolp); | |
469 | return 0; | |
470 | } | |
471 | ||
472 | static int rpcb_encode_getaddr(struct rpc_rqst *req, __be32 *p, | |
473 | struct rpcbind_args *rpcb) | |
474 | { | |
475 | dprintk("RPC: rpcb_encode_getaddr(%u, %u, %s)\n", | |
476 | rpcb->r_prog, rpcb->r_vers, rpcb->r_addr); | |
477 | *p++ = htonl(rpcb->r_prog); | |
478 | *p++ = htonl(rpcb->r_vers); | |
479 | ||
480 | p = xdr_encode_string(p, rpcb->r_netid); | |
481 | p = xdr_encode_string(p, rpcb->r_addr); | |
482 | p = xdr_encode_string(p, rpcb->r_owner); | |
483 | ||
484 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); | |
485 | ||
486 | return 0; | |
487 | } | |
488 | ||
489 | static int rpcb_decode_getaddr(struct rpc_rqst *req, __be32 *p, | |
490 | unsigned short *portp) | |
491 | { | |
492 | char *addr; | |
493 | int addr_len, c, i, f, first, val; | |
494 | ||
495 | *portp = 0; | |
496 | addr_len = (unsigned int) ntohl(*p++); | |
497 | if (addr_len > RPCB_MAXADDRLEN) /* sanity */ | |
498 | return -EINVAL; | |
499 | ||
500 | dprintk("RPC: rpcb_decode_getaddr returned string: '%s'\n", | |
501 | (char *) p); | |
502 | ||
503 | addr = (char *)p; | |
504 | val = 0; | |
505 | first = 1; | |
506 | f = 1; | |
507 | for (i = addr_len - 1; i > 0; i--) { | |
508 | c = addr[i]; | |
509 | if (c >= '0' && c <= '9') { | |
510 | val += (c - '0') * f; | |
511 | f *= 10; | |
512 | } else if (c == '.') { | |
513 | if (first) { | |
514 | *portp = val; | |
515 | val = first = 0; | |
516 | f = 1; | |
517 | } else { | |
518 | *portp |= (val << 8); | |
519 | break; | |
520 | } | |
521 | } | |
522 | } | |
523 | ||
524 | dprintk("RPC: rpcb_decode_getaddr port=%u\n", *portp); | |
525 | return 0; | |
526 | } | |
527 | ||
528 | #define RPCB_program_sz (1u) | |
529 | #define RPCB_version_sz (1u) | |
530 | #define RPCB_protocol_sz (1u) | |
531 | #define RPCB_port_sz (1u) | |
532 | #define RPCB_boolean_sz (1u) | |
533 | ||
534 | #define RPCB_netid_sz (1+XDR_QUADLEN(RPCB_MAXNETIDLEN)) | |
535 | #define RPCB_addr_sz (1+XDR_QUADLEN(RPCB_MAXADDRLEN)) | |
536 | #define RPCB_ownerstring_sz (1+XDR_QUADLEN(RPCB_MAXOWNERLEN)) | |
537 | ||
538 | #define RPCB_mappingargs_sz RPCB_program_sz+RPCB_version_sz+ \ | |
539 | RPCB_protocol_sz+RPCB_port_sz | |
540 | #define RPCB_getaddrargs_sz RPCB_program_sz+RPCB_version_sz+ \ | |
541 | RPCB_netid_sz+RPCB_addr_sz+ \ | |
542 | RPCB_ownerstring_sz | |
543 | ||
544 | #define RPCB_setres_sz RPCB_boolean_sz | |
545 | #define RPCB_getportres_sz RPCB_port_sz | |
546 | ||
547 | /* | |
548 | * Note that RFC 1833 does not put any size restrictions on the | |
549 | * address string returned by the remote rpcbind database. | |
550 | */ | |
551 | #define RPCB_getaddrres_sz RPCB_addr_sz | |
552 | ||
553 | #define PROC(proc, argtype, restype) \ | |
554 | [RPCBPROC_##proc] = { \ | |
555 | .p_proc = RPCBPROC_##proc, \ | |
556 | .p_encode = (kxdrproc_t) rpcb_encode_##argtype, \ | |
557 | .p_decode = (kxdrproc_t) rpcb_decode_##restype, \ | |
558 | .p_arglen = RPCB_##argtype##args_sz, \ | |
559 | .p_replen = RPCB_##restype##res_sz, \ | |
560 | .p_statidx = RPCBPROC_##proc, \ | |
561 | .p_timer = 0, \ | |
562 | .p_name = #proc, \ | |
563 | } | |
564 | ||
565 | /* | |
566 | * Not all rpcbind procedures described in RFC 1833 are implemented | |
567 | * since the Linux kernel RPC code requires only these. | |
568 | */ | |
569 | static struct rpc_procinfo rpcb_procedures2[] = { | |
570 | PROC(SET, mapping, set), | |
571 | PROC(UNSET, mapping, set), | |
572 | PROC(GETADDR, mapping, getport), | |
573 | }; | |
574 | ||
575 | static struct rpc_procinfo rpcb_procedures3[] = { | |
576 | PROC(SET, mapping, set), | |
577 | PROC(UNSET, mapping, set), | |
578 | PROC(GETADDR, getaddr, getaddr), | |
579 | }; | |
580 | ||
581 | static struct rpc_procinfo rpcb_procedures4[] = { | |
582 | PROC(SET, mapping, set), | |
583 | PROC(UNSET, mapping, set), | |
584 | PROC(GETVERSADDR, getaddr, getaddr), | |
585 | }; | |
586 | ||
587 | static struct rpcb_info rpcb_next_version[] = { | |
588 | #ifdef CONFIG_SUNRPC_BIND34 | |
589 | { 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] }, | |
590 | { 3, &rpcb_procedures3[RPCBPROC_GETADDR] }, | |
591 | #endif | |
592 | { 2, &rpcb_procedures2[RPCBPROC_GETPORT] }, | |
593 | { 0, NULL }, | |
594 | }; | |
595 | ||
596 | static struct rpc_version rpcb_version2 = { | |
597 | .number = 2, | |
598 | .nrprocs = RPCB_HIGHPROC_2, | |
599 | .procs = rpcb_procedures2 | |
600 | }; | |
601 | ||
602 | static struct rpc_version rpcb_version3 = { | |
603 | .number = 3, | |
604 | .nrprocs = RPCB_HIGHPROC_3, | |
605 | .procs = rpcb_procedures3 | |
606 | }; | |
607 | ||
608 | static struct rpc_version rpcb_version4 = { | |
609 | .number = 4, | |
610 | .nrprocs = RPCB_HIGHPROC_4, | |
611 | .procs = rpcb_procedures4 | |
612 | }; | |
613 | ||
614 | static struct rpc_version *rpcb_version[] = { | |
615 | NULL, | |
616 | NULL, | |
617 | &rpcb_version2, | |
618 | &rpcb_version3, | |
619 | &rpcb_version4 | |
620 | }; | |
621 | ||
622 | static struct rpc_stat rpcb_stats; | |
623 | ||
624 | struct rpc_program rpcb_program = { | |
625 | .name = "rpcbind", | |
626 | .number = RPCBIND_PROGRAM, | |
627 | .nrvers = ARRAY_SIZE(rpcb_version), | |
628 | .version = rpcb_version, | |
629 | .stats = &rpcb_stats, | |
630 | }; |