]>
Commit | Line | Data |
---|---|---|
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> | |
d5b64430 CL |
19 | #include <linux/in.h> |
20 | #include <linux/in6.h> | |
a509050b CL |
21 | #include <linux/kernel.h> |
22 | #include <linux/errno.h> | |
23 | ||
24 | #include <linux/sunrpc/clnt.h> | |
25 | #include <linux/sunrpc/sched.h> | |
0896a725 | 26 | #include <linux/sunrpc/xprtsock.h> |
a509050b CL |
27 | |
28 | #ifdef RPC_DEBUG | |
29 | # define RPCDBG_FACILITY RPCDBG_BIND | |
30 | #endif | |
31 | ||
32 | #define RPCBIND_PROGRAM (100000u) | |
33 | #define RPCBIND_PORT (111u) | |
34 | ||
fc200e79 CL |
35 | #define RPCBVERS_2 (2u) |
36 | #define RPCBVERS_3 (3u) | |
37 | #define RPCBVERS_4 (4u) | |
38 | ||
a509050b CL |
39 | enum { |
40 | RPCBPROC_NULL, | |
41 | RPCBPROC_SET, | |
42 | RPCBPROC_UNSET, | |
43 | RPCBPROC_GETPORT, | |
44 | RPCBPROC_GETADDR = 3, /* alias for GETPORT */ | |
45 | RPCBPROC_DUMP, | |
46 | RPCBPROC_CALLIT, | |
47 | RPCBPROC_BCAST = 5, /* alias for CALLIT */ | |
48 | RPCBPROC_GETTIME, | |
49 | RPCBPROC_UADDR2TADDR, | |
50 | RPCBPROC_TADDR2UADDR, | |
51 | RPCBPROC_GETVERSADDR, | |
52 | RPCBPROC_INDIRECT, | |
53 | RPCBPROC_GETADDRLIST, | |
54 | RPCBPROC_GETSTAT, | |
55 | }; | |
56 | ||
57 | #define RPCB_HIGHPROC_2 RPCBPROC_CALLIT | |
58 | #define RPCB_HIGHPROC_3 RPCBPROC_TADDR2UADDR | |
59 | #define RPCB_HIGHPROC_4 RPCBPROC_GETSTAT | |
60 | ||
a509050b CL |
61 | /* |
62 | * r_owner | |
63 | * | |
64 | * The "owner" is allowed to unset a service in the rpcbind database. | |
65 | * We always use the following (arbitrary) fixed string. | |
66 | */ | |
67 | #define RPCB_OWNER_STRING "rpcb" | |
68 | #define RPCB_MAXOWNERLEN sizeof(RPCB_OWNER_STRING) | |
69 | ||
70 | static void rpcb_getport_done(struct rpc_task *, void *); | |
7f4adeff | 71 | static struct rpc_program rpcb_program; |
a509050b CL |
72 | |
73 | struct rpcbind_args { | |
74 | struct rpc_xprt * r_xprt; | |
75 | ||
76 | u32 r_prog; | |
77 | u32 r_vers; | |
78 | u32 r_prot; | |
79 | unsigned short r_port; | |
86d61d86 TM |
80 | const char * r_netid; |
81 | const char * r_addr; | |
82 | const char * r_owner; | |
a509050b CL |
83 | }; |
84 | ||
85 | static struct rpc_procinfo rpcb_procedures2[]; | |
86 | static struct rpc_procinfo rpcb_procedures3[]; | |
87 | ||
d5b64430 | 88 | struct rpcb_info { |
fc200e79 | 89 | u32 rpc_vers; |
a509050b | 90 | struct rpc_procinfo * rpc_proc; |
d5b64430 CL |
91 | }; |
92 | ||
93 | static struct rpcb_info rpcb_next_version[]; | |
94 | static struct rpcb_info rpcb_next_version6[]; | |
a509050b | 95 | |
a509050b CL |
96 | static void rpcb_map_release(void *data) |
97 | { | |
98 | struct rpcbind_args *map = data; | |
99 | ||
100 | xprt_put(map->r_xprt); | |
101 | kfree(map); | |
102 | } | |
103 | ||
104 | static const struct rpc_call_ops rpcb_getport_ops = { | |
a509050b CL |
105 | .rpc_call_done = rpcb_getport_done, |
106 | .rpc_release = rpcb_map_release, | |
107 | }; | |
108 | ||
109 | static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status) | |
110 | { | |
111 | xprt_clear_binding(xprt); | |
112 | rpc_wake_up_status(&xprt->binding, status); | |
113 | } | |
114 | ||
115 | static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr, | |
0a48f5d7 | 116 | size_t salen, int proto, u32 version, |
9f6ad26d | 117 | int privileged) |
a509050b CL |
118 | { |
119 | struct rpc_create_args args = { | |
120 | .protocol = proto, | |
121 | .address = srvaddr, | |
9f6ad26d | 122 | .addrsize = salen, |
a509050b CL |
123 | .servername = hostname, |
124 | .program = &rpcb_program, | |
125 | .version = version, | |
126 | .authflavor = RPC_AUTH_UNIX, | |
150030b7 | 127 | .flags = RPC_CLNT_CREATE_NOPING, |
a509050b CL |
128 | }; |
129 | ||
d5b64430 CL |
130 | switch (srvaddr->sa_family) { |
131 | case AF_INET: | |
132 | ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT); | |
133 | break; | |
134 | case AF_INET6: | |
135 | ((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT); | |
136 | break; | |
137 | default: | |
138 | return NULL; | |
139 | } | |
140 | ||
a509050b CL |
141 | if (!privileged) |
142 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; | |
143 | return rpc_create(&args); | |
144 | } | |
145 | ||
146 | /** | |
147 | * rpcb_register - set or unset a port registration with the local rpcbind svc | |
148 | * @prog: RPC program number to bind | |
149 | * @vers: RPC version number to bind | |
150 | * @prot: transport protocol to use to make this request | |
151 | * @port: port value to register | |
152 | * @okay: result code | |
153 | * | |
154 | * port == 0 means unregister, port != 0 means register. | |
155 | * | |
156 | * This routine supports only rpcbind version 2. | |
157 | */ | |
158 | int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay) | |
159 | { | |
160 | struct sockaddr_in sin = { | |
161 | .sin_family = AF_INET, | |
162 | .sin_addr.s_addr = htonl(INADDR_LOOPBACK), | |
163 | }; | |
164 | struct rpcbind_args map = { | |
165 | .r_prog = prog, | |
166 | .r_vers = vers, | |
167 | .r_prot = prot, | |
168 | .r_port = port, | |
169 | }; | |
170 | struct rpc_message msg = { | |
171 | .rpc_proc = &rpcb_procedures2[port ? | |
172 | RPCBPROC_SET : RPCBPROC_UNSET], | |
173 | .rpc_argp = &map, | |
174 | .rpc_resp = okay, | |
175 | }; | |
176 | struct rpc_clnt *rpcb_clnt; | |
177 | int error = 0; | |
178 | ||
179 | dprintk("RPC: %sregistering (%u, %u, %d, %u) with local " | |
180 | "rpcbind\n", (port ? "" : "un"), | |
181 | prog, vers, prot, port); | |
182 | ||
183 | rpcb_clnt = rpcb_create("localhost", (struct sockaddr *) &sin, | |
fc200e79 | 184 | sizeof(sin), XPRT_TRANSPORT_UDP, RPCBVERS_2, 1); |
a509050b CL |
185 | if (IS_ERR(rpcb_clnt)) |
186 | return PTR_ERR(rpcb_clnt); | |
187 | ||
188 | error = rpc_call_sync(rpcb_clnt, &msg, 0); | |
189 | ||
90c5755f | 190 | rpc_shutdown_client(rpcb_clnt); |
a509050b CL |
191 | if (error < 0) |
192 | printk(KERN_WARNING "RPC: failed to contact local rpcbind " | |
193 | "server (errno %d).\n", -error); | |
194 | dprintk("RPC: registration status %d/%d\n", error, *okay); | |
195 | ||
196 | return error; | |
197 | } | |
198 | ||
a509050b | 199 | /** |
cce63cd6 | 200 | * rpcb_getport_sync - obtain the port for an RPC service on a given host |
a509050b CL |
201 | * @sin: address of remote peer |
202 | * @prog: RPC program number to bind | |
203 | * @vers: RPC version number to bind | |
204 | * @prot: transport protocol to use to make this request | |
205 | * | |
67d60213 CL |
206 | * Return value is the requested advertised port number, |
207 | * or a negative errno value. | |
208 | * | |
a509050b | 209 | * Called from outside the RPC client in a synchronous task context. |
cce63cd6 | 210 | * Uses default timeout parameters specified by underlying transport. |
a509050b | 211 | * |
67d60213 | 212 | * XXX: Needs to support IPv6 |
a509050b | 213 | */ |
f1ec08cb | 214 | int rpcb_getport_sync(struct sockaddr_in *sin, u32 prog, u32 vers, int prot) |
a509050b CL |
215 | { |
216 | struct rpcbind_args map = { | |
217 | .r_prog = prog, | |
218 | .r_vers = vers, | |
219 | .r_prot = prot, | |
220 | .r_port = 0, | |
221 | }; | |
222 | struct rpc_message msg = { | |
223 | .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT], | |
224 | .rpc_argp = &map, | |
225 | .rpc_resp = &map.r_port, | |
226 | }; | |
227 | struct rpc_clnt *rpcb_clnt; | |
a509050b CL |
228 | int status; |
229 | ||
cce63cd6 | 230 | dprintk("RPC: %s(" NIPQUAD_FMT ", %u, %u, %d)\n", |
0dc47877 | 231 | __func__, NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot); |
a509050b | 232 | |
b91e101f | 233 | rpcb_clnt = rpcb_create(NULL, (struct sockaddr *)sin, |
fc200e79 | 234 | sizeof(*sin), prot, RPCBVERS_2, 0); |
a509050b CL |
235 | if (IS_ERR(rpcb_clnt)) |
236 | return PTR_ERR(rpcb_clnt); | |
237 | ||
238 | status = rpc_call_sync(rpcb_clnt, &msg, 0); | |
90c5755f | 239 | rpc_shutdown_client(rpcb_clnt); |
a509050b CL |
240 | |
241 | if (status >= 0) { | |
242 | if (map.r_port != 0) | |
243 | return map.r_port; | |
244 | status = -EACCES; | |
245 | } | |
246 | return status; | |
247 | } | |
cce63cd6 | 248 | EXPORT_SYMBOL_GPL(rpcb_getport_sync); |
a509050b | 249 | |
803a9067 | 250 | static struct rpc_task *rpcb_call_async(struct rpc_clnt *rpcb_clnt, struct rpcbind_args *map, struct rpc_procinfo *proc) |
5138fde0 TM |
251 | { |
252 | struct rpc_message msg = { | |
803a9067 | 253 | .rpc_proc = proc, |
5138fde0 TM |
254 | .rpc_argp = map, |
255 | .rpc_resp = &map->r_port, | |
256 | }; | |
257 | struct rpc_task_setup task_setup_data = { | |
258 | .rpc_client = rpcb_clnt, | |
259 | .rpc_message = &msg, | |
260 | .callback_ops = &rpcb_getport_ops, | |
261 | .callback_data = map, | |
262 | .flags = RPC_TASK_ASYNC, | |
263 | }; | |
264 | ||
265 | return rpc_run_task(&task_setup_data); | |
266 | } | |
267 | ||
a509050b | 268 | /** |
45160d62 | 269 | * rpcb_getport_async - obtain the port for a given RPC service on a given host |
a509050b CL |
270 | * @task: task that is waiting for portmapper request |
271 | * | |
272 | * This one can be called for an ongoing RPC request, and can be used in | |
273 | * an async (rpciod) context. | |
274 | */ | |
45160d62 | 275 | void rpcb_getport_async(struct rpc_task *task) |
a509050b CL |
276 | { |
277 | struct rpc_clnt *clnt = task->tk_client; | |
803a9067 | 278 | struct rpc_procinfo *proc; |
0a48f5d7 | 279 | u32 bind_version; |
a509050b CL |
280 | struct rpc_xprt *xprt = task->tk_xprt; |
281 | struct rpc_clnt *rpcb_clnt; | |
282 | static struct rpcbind_args *map; | |
283 | struct rpc_task *child; | |
9f6ad26d CL |
284 | struct sockaddr_storage addr; |
285 | struct sockaddr *sap = (struct sockaddr *)&addr; | |
286 | size_t salen; | |
a509050b CL |
287 | int status; |
288 | ||
45160d62 | 289 | dprintk("RPC: %5u %s(%s, %u, %u, %d)\n", |
0dc47877 | 290 | task->tk_pid, __func__, |
45160d62 | 291 | clnt->cl_server, clnt->cl_prog, clnt->cl_vers, xprt->prot); |
a509050b CL |
292 | |
293 | /* Autobind on cloned rpc clients is discouraged */ | |
294 | BUG_ON(clnt->cl_parent != clnt); | |
295 | ||
296 | if (xprt_test_and_set_binding(xprt)) { | |
2429cbf6 | 297 | status = -EAGAIN; /* tell caller to check again */ |
45160d62 | 298 | dprintk("RPC: %5u %s: waiting for another binder\n", |
0dc47877 | 299 | task->tk_pid, __func__); |
a509050b CL |
300 | goto bailout_nowake; |
301 | } | |
302 | ||
303 | /* Put self on queue before sending rpcbind request, in case | |
304 | * rpcb_getport_done completes before we return from rpc_run_task */ | |
5d00837b | 305 | rpc_sleep_on(&xprt->binding, task, NULL); |
a509050b CL |
306 | |
307 | /* Someone else may have bound if we slept */ | |
308 | if (xprt_bound(xprt)) { | |
309 | status = 0; | |
45160d62 | 310 | dprintk("RPC: %5u %s: already bound\n", |
0dc47877 | 311 | task->tk_pid, __func__); |
a509050b CL |
312 | goto bailout_nofree; |
313 | } | |
314 | ||
9f6ad26d | 315 | salen = rpc_peeraddr(clnt, sap, sizeof(addr)); |
d5b64430 CL |
316 | |
317 | /* Don't ever use rpcbind v2 for AF_INET6 requests */ | |
9f6ad26d | 318 | switch (sap->sa_family) { |
d5b64430 | 319 | case AF_INET: |
803a9067 TM |
320 | proc = rpcb_next_version[xprt->bind_index].rpc_proc; |
321 | bind_version = rpcb_next_version[xprt->bind_index].rpc_vers; | |
d5b64430 CL |
322 | break; |
323 | case AF_INET6: | |
803a9067 TM |
324 | proc = rpcb_next_version6[xprt->bind_index].rpc_proc; |
325 | bind_version = rpcb_next_version6[xprt->bind_index].rpc_vers; | |
d5b64430 CL |
326 | break; |
327 | default: | |
328 | status = -EAFNOSUPPORT; | |
329 | dprintk("RPC: %5u %s: bad address family\n", | |
0dc47877 | 330 | task->tk_pid, __func__); |
d5b64430 CL |
331 | goto bailout_nofree; |
332 | } | |
803a9067 | 333 | if (proc == NULL) { |
a509050b | 334 | xprt->bind_index = 0; |
906462af | 335 | status = -EPFNOSUPPORT; |
45160d62 | 336 | dprintk("RPC: %5u %s: no more getport versions available\n", |
0dc47877 | 337 | task->tk_pid, __func__); |
a509050b CL |
338 | goto bailout_nofree; |
339 | } | |
a509050b | 340 | |
45160d62 | 341 | dprintk("RPC: %5u %s: trying rpcbind version %u\n", |
0dc47877 | 342 | task->tk_pid, __func__, bind_version); |
a509050b | 343 | |
9f6ad26d | 344 | rpcb_clnt = rpcb_create(clnt->cl_server, sap, salen, xprt->prot, |
143b6c40 CL |
345 | bind_version, 0); |
346 | if (IS_ERR(rpcb_clnt)) { | |
347 | status = PTR_ERR(rpcb_clnt); | |
348 | dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n", | |
0dc47877 | 349 | task->tk_pid, __func__, PTR_ERR(rpcb_clnt)); |
143b6c40 CL |
350 | goto bailout_nofree; |
351 | } | |
352 | ||
a509050b CL |
353 | map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC); |
354 | if (!map) { | |
355 | status = -ENOMEM; | |
45160d62 | 356 | dprintk("RPC: %5u %s: no memory available\n", |
0dc47877 | 357 | task->tk_pid, __func__); |
a509050b CL |
358 | goto bailout_nofree; |
359 | } | |
360 | map->r_prog = clnt->cl_prog; | |
361 | map->r_vers = clnt->cl_vers; | |
362 | map->r_prot = xprt->prot; | |
363 | map->r_port = 0; | |
364 | map->r_xprt = xprt_get(xprt); | |
86d61d86 TM |
365 | map->r_netid = rpc_peeraddr2str(clnt, RPC_DISPLAY_NETID); |
366 | map->r_addr = rpc_peeraddr2str(rpcb_clnt, RPC_DISPLAY_UNIVERSAL_ADDR); | |
a509050b CL |
367 | map->r_owner = RPCB_OWNER_STRING; /* ignored for GETADDR */ |
368 | ||
803a9067 | 369 | child = rpcb_call_async(rpcb_clnt, map, proc); |
4c402b40 | 370 | rpc_release_client(rpcb_clnt); |
a509050b CL |
371 | if (IS_ERR(child)) { |
372 | status = -EIO; | |
0d3a34b4 | 373 | /* rpcb_map_release() has freed the arguments */ |
45160d62 | 374 | dprintk("RPC: %5u %s: rpc_run_task failed\n", |
0dc47877 | 375 | task->tk_pid, __func__); |
0d3a34b4 | 376 | goto bailout_nofree; |
a509050b CL |
377 | } |
378 | rpc_put_task(child); | |
379 | ||
380 | task->tk_xprt->stat.bind_count++; | |
381 | return; | |
382 | ||
a509050b CL |
383 | bailout_nofree: |
384 | rpcb_wake_rpcbind_waiters(xprt, status); | |
385 | bailout_nowake: | |
386 | task->tk_status = status; | |
387 | } | |
12444809 | 388 | EXPORT_SYMBOL_GPL(rpcb_getport_async); |
a509050b CL |
389 | |
390 | /* | |
391 | * Rpcbind child task calls this callback via tk_exit. | |
392 | */ | |
393 | static void rpcb_getport_done(struct rpc_task *child, void *data) | |
394 | { | |
395 | struct rpcbind_args *map = data; | |
396 | struct rpc_xprt *xprt = map->r_xprt; | |
397 | int status = child->tk_status; | |
398 | ||
4784cb51 CL |
399 | /* Garbage reply: retry with a lesser rpcbind version */ |
400 | if (status == -EIO) | |
401 | status = -EPROTONOSUPPORT; | |
402 | ||
a509050b CL |
403 | /* rpcbind server doesn't support this rpcbind protocol version */ |
404 | if (status == -EPROTONOSUPPORT) | |
405 | xprt->bind_index++; | |
406 | ||
407 | if (status < 0) { | |
408 | /* rpcbind server not available on remote host? */ | |
409 | xprt->ops->set_port(xprt, 0); | |
410 | } else if (map->r_port == 0) { | |
411 | /* Requested RPC service wasn't registered on remote host */ | |
412 | xprt->ops->set_port(xprt, 0); | |
413 | status = -EACCES; | |
414 | } else { | |
415 | /* Succeeded */ | |
416 | xprt->ops->set_port(xprt, map->r_port); | |
417 | xprt_set_bound(xprt); | |
418 | status = 0; | |
419 | } | |
420 | ||
421 | dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n", | |
422 | child->tk_pid, status, map->r_port); | |
423 | ||
424 | rpcb_wake_rpcbind_waiters(xprt, status); | |
425 | } | |
426 | ||
427 | static int rpcb_encode_mapping(struct rpc_rqst *req, __be32 *p, | |
428 | struct rpcbind_args *rpcb) | |
429 | { | |
430 | dprintk("RPC: rpcb_encode_mapping(%u, %u, %d, %u)\n", | |
431 | rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port); | |
432 | *p++ = htonl(rpcb->r_prog); | |
433 | *p++ = htonl(rpcb->r_vers); | |
434 | *p++ = htonl(rpcb->r_prot); | |
435 | *p++ = htonl(rpcb->r_port); | |
436 | ||
437 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); | |
438 | return 0; | |
439 | } | |
440 | ||
441 | static int rpcb_decode_getport(struct rpc_rqst *req, __be32 *p, | |
442 | unsigned short *portp) | |
443 | { | |
444 | *portp = (unsigned short) ntohl(*p++); | |
877fcf10 | 445 | dprintk("RPC: rpcb_decode_getport result %u\n", |
a509050b CL |
446 | *portp); |
447 | return 0; | |
448 | } | |
449 | ||
450 | static int rpcb_decode_set(struct rpc_rqst *req, __be32 *p, | |
451 | unsigned int *boolp) | |
452 | { | |
453 | *boolp = (unsigned int) ntohl(*p++); | |
877fcf10 CL |
454 | dprintk("RPC: rpcb_decode_set: call %s\n", |
455 | (*boolp ? "succeeded" : "failed")); | |
a509050b CL |
456 | return 0; |
457 | } | |
458 | ||
459 | static int rpcb_encode_getaddr(struct rpc_rqst *req, __be32 *p, | |
460 | struct rpcbind_args *rpcb) | |
461 | { | |
462 | dprintk("RPC: rpcb_encode_getaddr(%u, %u, %s)\n", | |
463 | rpcb->r_prog, rpcb->r_vers, rpcb->r_addr); | |
464 | *p++ = htonl(rpcb->r_prog); | |
465 | *p++ = htonl(rpcb->r_vers); | |
466 | ||
467 | p = xdr_encode_string(p, rpcb->r_netid); | |
468 | p = xdr_encode_string(p, rpcb->r_addr); | |
469 | p = xdr_encode_string(p, rpcb->r_owner); | |
470 | ||
471 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); | |
472 | ||
473 | return 0; | |
474 | } | |
475 | ||
476 | static int rpcb_decode_getaddr(struct rpc_rqst *req, __be32 *p, | |
477 | unsigned short *portp) | |
478 | { | |
479 | char *addr; | |
adc24df8 CL |
480 | u32 addr_len; |
481 | int c, i, f, first, val; | |
a509050b CL |
482 | |
483 | *portp = 0; | |
adc24df8 | 484 | addr_len = ntohl(*p++); |
a509050b | 485 | |
e65fe397 CL |
486 | /* |
487 | * Simple sanity check. The smallest possible universal | |
488 | * address is an IPv4 address string containing 11 bytes. | |
489 | */ | |
0fb2b7e9 | 490 | if (addr_len < 11 || addr_len > RPCBIND_MAXUADDRLEN) |
e65fe397 CL |
491 | goto out_err; |
492 | ||
493 | /* | |
494 | * Start at the end and walk backwards until the first dot | |
495 | * is encountered. When the second dot is found, we have | |
496 | * both parts of the port number. | |
497 | */ | |
a509050b CL |
498 | addr = (char *)p; |
499 | val = 0; | |
500 | first = 1; | |
501 | f = 1; | |
502 | for (i = addr_len - 1; i > 0; i--) { | |
503 | c = addr[i]; | |
504 | if (c >= '0' && c <= '9') { | |
505 | val += (c - '0') * f; | |
506 | f *= 10; | |
507 | } else if (c == '.') { | |
508 | if (first) { | |
509 | *portp = val; | |
510 | val = first = 0; | |
511 | f = 1; | |
512 | } else { | |
513 | *portp |= (val << 8); | |
514 | break; | |
515 | } | |
516 | } | |
517 | } | |
518 | ||
e65fe397 CL |
519 | /* |
520 | * Simple sanity check. If we never saw a dot in the reply, | |
521 | * then this was probably just garbage. | |
522 | */ | |
523 | if (first) | |
524 | goto out_err; | |
525 | ||
a509050b CL |
526 | dprintk("RPC: rpcb_decode_getaddr port=%u\n", *portp); |
527 | return 0; | |
e65fe397 CL |
528 | |
529 | out_err: | |
530 | dprintk("RPC: rpcbind server returned malformed reply\n"); | |
531 | return -EIO; | |
a509050b CL |
532 | } |
533 | ||
534 | #define RPCB_program_sz (1u) | |
535 | #define RPCB_version_sz (1u) | |
536 | #define RPCB_protocol_sz (1u) | |
537 | #define RPCB_port_sz (1u) | |
538 | #define RPCB_boolean_sz (1u) | |
539 | ||
4f40ee4a | 540 | #define RPCB_netid_sz (1+XDR_QUADLEN(RPCBIND_MAXNETIDLEN)) |
0fb2b7e9 | 541 | #define RPCB_addr_sz (1+XDR_QUADLEN(RPCBIND_MAXUADDRLEN)) |
a509050b CL |
542 | #define RPCB_ownerstring_sz (1+XDR_QUADLEN(RPCB_MAXOWNERLEN)) |
543 | ||
544 | #define RPCB_mappingargs_sz RPCB_program_sz+RPCB_version_sz+ \ | |
545 | RPCB_protocol_sz+RPCB_port_sz | |
546 | #define RPCB_getaddrargs_sz RPCB_program_sz+RPCB_version_sz+ \ | |
547 | RPCB_netid_sz+RPCB_addr_sz+ \ | |
548 | RPCB_ownerstring_sz | |
549 | ||
550 | #define RPCB_setres_sz RPCB_boolean_sz | |
551 | #define RPCB_getportres_sz RPCB_port_sz | |
552 | ||
553 | /* | |
554 | * Note that RFC 1833 does not put any size restrictions on the | |
555 | * address string returned by the remote rpcbind database. | |
556 | */ | |
557 | #define RPCB_getaddrres_sz RPCB_addr_sz | |
558 | ||
559 | #define PROC(proc, argtype, restype) \ | |
560 | [RPCBPROC_##proc] = { \ | |
561 | .p_proc = RPCBPROC_##proc, \ | |
562 | .p_encode = (kxdrproc_t) rpcb_encode_##argtype, \ | |
563 | .p_decode = (kxdrproc_t) rpcb_decode_##restype, \ | |
564 | .p_arglen = RPCB_##argtype##args_sz, \ | |
565 | .p_replen = RPCB_##restype##res_sz, \ | |
566 | .p_statidx = RPCBPROC_##proc, \ | |
567 | .p_timer = 0, \ | |
568 | .p_name = #proc, \ | |
569 | } | |
570 | ||
571 | /* | |
572 | * Not all rpcbind procedures described in RFC 1833 are implemented | |
573 | * since the Linux kernel RPC code requires only these. | |
574 | */ | |
575 | static struct rpc_procinfo rpcb_procedures2[] = { | |
576 | PROC(SET, mapping, set), | |
577 | PROC(UNSET, mapping, set), | |
6a774051 | 578 | PROC(GETPORT, mapping, getport), |
a509050b CL |
579 | }; |
580 | ||
581 | static struct rpc_procinfo rpcb_procedures3[] = { | |
582 | PROC(SET, mapping, set), | |
583 | PROC(UNSET, mapping, set), | |
584 | PROC(GETADDR, getaddr, getaddr), | |
585 | }; | |
586 | ||
587 | static struct rpc_procinfo rpcb_procedures4[] = { | |
588 | PROC(SET, mapping, set), | |
589 | PROC(UNSET, mapping, set), | |
8842413a | 590 | PROC(GETADDR, getaddr, getaddr), |
a509050b CL |
591 | PROC(GETVERSADDR, getaddr, getaddr), |
592 | }; | |
593 | ||
594 | static struct rpcb_info rpcb_next_version[] = { | |
fc200e79 CL |
595 | { |
596 | .rpc_vers = RPCBVERS_2, | |
597 | .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT], | |
598 | }, | |
599 | { | |
600 | .rpc_proc = NULL, | |
601 | }, | |
a509050b CL |
602 | }; |
603 | ||
d5b64430 | 604 | static struct rpcb_info rpcb_next_version6[] = { |
fc200e79 CL |
605 | { |
606 | .rpc_vers = RPCBVERS_4, | |
8842413a | 607 | .rpc_proc = &rpcb_procedures4[RPCBPROC_GETADDR], |
fc200e79 CL |
608 | }, |
609 | { | |
610 | .rpc_vers = RPCBVERS_3, | |
611 | .rpc_proc = &rpcb_procedures3[RPCBPROC_GETADDR], | |
612 | }, | |
fc200e79 CL |
613 | { |
614 | .rpc_proc = NULL, | |
615 | }, | |
d5b64430 CL |
616 | }; |
617 | ||
a509050b | 618 | static struct rpc_version rpcb_version2 = { |
fc200e79 | 619 | .number = RPCBVERS_2, |
a509050b CL |
620 | .nrprocs = RPCB_HIGHPROC_2, |
621 | .procs = rpcb_procedures2 | |
622 | }; | |
623 | ||
624 | static struct rpc_version rpcb_version3 = { | |
fc200e79 | 625 | .number = RPCBVERS_3, |
a509050b CL |
626 | .nrprocs = RPCB_HIGHPROC_3, |
627 | .procs = rpcb_procedures3 | |
628 | }; | |
629 | ||
630 | static struct rpc_version rpcb_version4 = { | |
fc200e79 | 631 | .number = RPCBVERS_4, |
a509050b CL |
632 | .nrprocs = RPCB_HIGHPROC_4, |
633 | .procs = rpcb_procedures4 | |
634 | }; | |
635 | ||
636 | static struct rpc_version *rpcb_version[] = { | |
637 | NULL, | |
638 | NULL, | |
639 | &rpcb_version2, | |
640 | &rpcb_version3, | |
641 | &rpcb_version4 | |
642 | }; | |
643 | ||
644 | static struct rpc_stat rpcb_stats; | |
645 | ||
7f4adeff | 646 | static struct rpc_program rpcb_program = { |
a509050b CL |
647 | .name = "rpcbind", |
648 | .number = RPCBIND_PROGRAM, | |
649 | .nrvers = ARRAY_SIZE(rpcb_version), | |
650 | .version = rpcb_version, | |
651 | .stats = &rpcb_stats, | |
652 | }; |