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[NETFILTER]: x_tables: fix xt_register_table error propagation
[deliverable/linux.git] / net / netfilter / nf_conntrack_proto_sctp.c
CommitLineData
9fb9cbb1
YK		 1/*
2 * Connection tracking protocol helper module for SCTP.
3 *
4 * SCTP is defined in RFC 2960. References to various sections in this code
5 * are to this RFC.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * 17 Oct 2004: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
12 * - enable working with L3 protocol independent connection tracking.
13 *
14 * Derived from net/ipv4/ip_conntrack_sctp.c
15 */
16
17/*
18 * Added support for proc manipulation of timeouts.
19 */
20
21#include <linux/types.h>
22#include <linux/sched.h>
23#include <linux/timer.h>
24#include <linux/netfilter.h>
25#include <linux/module.h>
26#include <linux/in.h>
27#include <linux/ip.h>
28#include <linux/sctp.h>
29#include <linux/string.h>
30#include <linux/seq_file.h>
31
32#include <net/netfilter/nf_conntrack.h>
33#include <net/netfilter/nf_conntrack_protocol.h>
34
35#if 0
36#define DEBUGP(format, ...) printk(format, ## __VA_ARGS__)
37#else
38#define DEBUGP(format, args...)
39#endif
40
41/* Protects conntrack->proto.sctp */
42static DEFINE_RWLOCK(sctp_lock);
43
44/* FIXME: Examine ipfilter's timeouts and conntrack transitions more
45 closely. They're more complex. --RR
46
47 And so for me for SCTP :D -Kiran */
48
49static const char *sctp_conntrack_names[] = {
50 "NONE",
51 "CLOSED",
52 "COOKIE_WAIT",
53 "COOKIE_ECHOED",
54 "ESTABLISHED",
55 "SHUTDOWN_SENT",
56 "SHUTDOWN_RECD",
57 "SHUTDOWN_ACK_SENT",
58};
59
60#define SECS * HZ
61#define MINS * 60 SECS
62#define HOURS * 60 MINS
63#define DAYS * 24 HOURS
64
babbdb1a
PM		 65static unsigned int nf_ct_sctp_timeout_closed = 10 SECS;
66static unsigned int nf_ct_sctp_timeout_cookie_wait = 3 SECS;
67static unsigned int nf_ct_sctp_timeout_cookie_echoed = 3 SECS;
68static unsigned int nf_ct_sctp_timeout_established = 5 DAYS;
69static unsigned int nf_ct_sctp_timeout_shutdown_sent = 300 SECS / 1000;
70static unsigned int nf_ct_sctp_timeout_shutdown_recd = 300 SECS / 1000;
71static unsigned int nf_ct_sctp_timeout_shutdown_ack_sent = 3 SECS;
9fb9cbb1 72
babbdb1a 73static unsigned int * sctp_timeouts[]
9fb9cbb1
YK		 74= { NULL, /* SCTP_CONNTRACK_NONE */
75 &nf_ct_sctp_timeout_closed, /* SCTP_CONNTRACK_CLOSED */
76 &nf_ct_sctp_timeout_cookie_wait, /* SCTP_CONNTRACK_COOKIE_WAIT */
77 &nf_ct_sctp_timeout_cookie_echoed, /* SCTP_CONNTRACK_COOKIE_ECHOED */
78 &nf_ct_sctp_timeout_established, /* SCTP_CONNTRACK_ESTABLISHED */
79 &nf_ct_sctp_timeout_shutdown_sent, /* SCTP_CONNTRACK_SHUTDOWN_SENT */
80 &nf_ct_sctp_timeout_shutdown_recd, /* SCTP_CONNTRACK_SHUTDOWN_RECD */
81 &nf_ct_sctp_timeout_shutdown_ack_sent /* SCTP_CONNTRACK_SHUTDOWN_ACK_SENT */
82 };
83
84#define sNO SCTP_CONNTRACK_NONE
85#define sCL SCTP_CONNTRACK_CLOSED
86#define sCW SCTP_CONNTRACK_COOKIE_WAIT
87#define sCE SCTP_CONNTRACK_COOKIE_ECHOED
88#define sES SCTP_CONNTRACK_ESTABLISHED
89#define sSS SCTP_CONNTRACK_SHUTDOWN_SENT
90#define sSR SCTP_CONNTRACK_SHUTDOWN_RECD
91#define sSA SCTP_CONNTRACK_SHUTDOWN_ACK_SENT
92#define sIV SCTP_CONNTRACK_MAX
93
94/*
95 These are the descriptions of the states:
96
97NOTE: These state names are tantalizingly similar to the states of an
98SCTP endpoint. But the interpretation of the states is a little different,
99considering that these are the states of the connection and not of an end
100point. Please note the subtleties. -Kiran
101
102NONE - Nothing so far.
103COOKIE WAIT - We have seen an INIT chunk in the original direction, or also
104 an INIT_ACK chunk in the reply direction.
105COOKIE ECHOED - We have seen a COOKIE_ECHO chunk in the original direction.
106ESTABLISHED - We have seen a COOKIE_ACK in the reply direction.
107SHUTDOWN_SENT - We have seen a SHUTDOWN chunk in the original direction.
108SHUTDOWN_RECD - We have seen a SHUTDOWN chunk in the reply directoin.
109SHUTDOWN_ACK_SENT - We have seen a SHUTDOWN_ACK chunk in the direction opposite
110 to that of the SHUTDOWN chunk.
111CLOSED - We have seen a SHUTDOWN_COMPLETE chunk in the direction of
112 the SHUTDOWN chunk. Connection is closed.
113*/
114
115/* TODO
116 - I have assumed that the first INIT is in the original direction.
117 This messes things when an INIT comes in the reply direction in CLOSED
118 state.
119 - Check the error type in the reply dir before transitioning from
120cookie echoed to closed.
121 - Sec 5.2.4 of RFC 2960
122 - Multi Homing support.
123*/
124
125/* SCTP conntrack state transitions */
126static enum sctp_conntrack sctp_conntracks[2][9][SCTP_CONNTRACK_MAX] = {
127 {
128/* ORIGINAL */
129/* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA */
130/* init */ {sCW, sCW, sCW, sCE, sES, sSS, sSR, sSA},
131/* init_ack */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA},
132/* abort */ {sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL},
133/* shutdown */ {sCL, sCL, sCW, sCE, sSS, sSS, sSR, sSA},
134/* shutdown_ack */ {sSA, sCL, sCW, sCE, sES, sSA, sSA, sSA},
135/* error */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA},/* Cant have Stale cookie*/
136/* cookie_echo */ {sCL, sCL, sCE, sCE, sES, sSS, sSR, sSA},/* 5.2.4 - Big TODO */
137/* cookie_ack */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA},/* Cant come in orig dir */
138/* shutdown_comp*/ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sCL}
139 },
140 {
141/* REPLY */
142/* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA */
143/* init */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA},/* INIT in sCL Big TODO */
144/* init_ack */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA},
145/* abort */ {sIV, sCL, sCL, sCL, sCL, sCL, sCL, sCL},
146/* shutdown */ {sIV, sCL, sCW, sCE, sSR, sSS, sSR, sSA},
147/* shutdown_ack */ {sIV, sCL, sCW, sCE, sES, sSA, sSA, sSA},
148/* error */ {sIV, sCL, sCW, sCL, sES, sSS, sSR, sSA},
149/* cookie_echo */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA},/* Cant come in reply dir */
150/* cookie_ack */ {sIV, sCL, sCW, sES, sES, sSS, sSR, sSA},
151/* shutdown_comp*/ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sCL}
152 }
153};
154
155static int sctp_pkt_to_tuple(const struct sk_buff *skb,
156 unsigned int dataoff,
157 struct nf_conntrack_tuple *tuple)
158{
159 sctp_sctphdr_t _hdr, *hp;
160
161 DEBUGP(__FUNCTION__);
162 DEBUGP("\n");
163
164 /* Actually only need first 8 bytes. */
165 hp = skb_header_pointer(skb, dataoff, 8, &_hdr);
166 if (hp == NULL)
167 return 0;
168
169 tuple->src.u.sctp.port = hp->source;
170 tuple->dst.u.sctp.port = hp->dest;
171 return 1;
172}
173
174static int sctp_invert_tuple(struct nf_conntrack_tuple *tuple,
175 const struct nf_conntrack_tuple *orig)
176{
177 DEBUGP(__FUNCTION__);
178 DEBUGP("\n");
179
180 tuple->src.u.sctp.port = orig->dst.u.sctp.port;
181 tuple->dst.u.sctp.port = orig->src.u.sctp.port;
182 return 1;
183}
184
185/* Print out the per-protocol part of the tuple. */
186static int sctp_print_tuple(struct seq_file *s,
187 const struct nf_conntrack_tuple *tuple)
188{
189 DEBUGP(__FUNCTION__);
190 DEBUGP("\n");
191
192 return seq_printf(s, "sport=%hu dport=%hu ",
193 ntohs(tuple->src.u.sctp.port),
194 ntohs(tuple->dst.u.sctp.port));
195}
196
197/* Print out the private part of the conntrack. */
198static int sctp_print_conntrack(struct seq_file *s,
199 const struct nf_conn *conntrack)
200{
201 enum sctp_conntrack state;
202
203 DEBUGP(__FUNCTION__);
204 DEBUGP("\n");
205
206 read_lock_bh(&sctp_lock);
207 state = conntrack->proto.sctp.state;
208 read_unlock_bh(&sctp_lock);
209
210 return seq_printf(s, "%s ", sctp_conntrack_names[state]);
211}
212
213#define for_each_sctp_chunk(skb, sch, _sch, offset, dataoff, count) \
214for (offset = dataoff + sizeof(sctp_sctphdr_t), count = 0; \
215 offset < skb->len && \
216 (sch = skb_header_pointer(skb, offset, sizeof(_sch), &_sch)); \
217 offset += (htons(sch->length) + 3) & ~3, count++)
218
219/* Some validity checks to make sure the chunks are fine */
220static int do_basic_checks(struct nf_conn *conntrack,
221 const struct sk_buff *skb,
222 unsigned int dataoff,
223 char *map)
224{
225 u_int32_t offset, count;
226 sctp_chunkhdr_t _sch, *sch;
227 int flag;
228
229 DEBUGP(__FUNCTION__);
230 DEBUGP("\n");
231
232 flag = 0;
233
234 for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) {
235 DEBUGP("Chunk Num: %d Type: %d\n", count, sch->type);
236
237 if (sch->type == SCTP_CID_INIT
238 || sch->type == SCTP_CID_INIT_ACK
239 || sch->type == SCTP_CID_SHUTDOWN_COMPLETE) {
240 flag = 1;
241 }
242
e17df688
PM		 243 /*
244 * Cookie Ack/Echo chunks not the first OR
245 * Init / Init Ack / Shutdown compl chunks not the only chunks
246 * OR zero-length.
247 */
248 if (((sch->type == SCTP_CID_COOKIE_ACK
9fb9cbb1
YK		 249 || sch->type == SCTP_CID_COOKIE_ECHO
250 || flag)
e17df688 251 && count !=0) || !sch->length) {
9fb9cbb1
YK		 252 DEBUGP("Basic checks failed\n");
253 return 1;
254 }
255
256 if (map) {
257 set_bit(sch->type, (void *)map);
258 }
259 }
260
261 DEBUGP("Basic checks passed\n");
262 return 0;
263}
264
265static int new_state(enum ip_conntrack_dir dir,
266 enum sctp_conntrack cur_state,
267 int chunk_type)
268{
269 int i;
270
271 DEBUGP(__FUNCTION__);
272 DEBUGP("\n");
273
274 DEBUGP("Chunk type: %d\n", chunk_type);
275
276 switch (chunk_type) {
277 case SCTP_CID_INIT:
278 DEBUGP("SCTP_CID_INIT\n");
279 i = 0; break;
280 case SCTP_CID_INIT_ACK:
281 DEBUGP("SCTP_CID_INIT_ACK\n");
282 i = 1; break;
283 case SCTP_CID_ABORT:
284 DEBUGP("SCTP_CID_ABORT\n");
285 i = 2; break;
286 case SCTP_CID_SHUTDOWN:
287 DEBUGP("SCTP_CID_SHUTDOWN\n");
288 i = 3; break;
289 case SCTP_CID_SHUTDOWN_ACK:
290 DEBUGP("SCTP_CID_SHUTDOWN_ACK\n");
291 i = 4; break;
292 case SCTP_CID_ERROR:
293 DEBUGP("SCTP_CID_ERROR\n");
294 i = 5; break;
295 case SCTP_CID_COOKIE_ECHO:
296 DEBUGP("SCTP_CID_COOKIE_ECHO\n");
297 i = 6; break;
298 case SCTP_CID_COOKIE_ACK:
299 DEBUGP("SCTP_CID_COOKIE_ACK\n");
300 i = 7; break;
301 case SCTP_CID_SHUTDOWN_COMPLETE:
302 DEBUGP("SCTP_CID_SHUTDOWN_COMPLETE\n");
303 i = 8; break;
304 default:
305 /* Other chunks like DATA, SACK, HEARTBEAT and
306 its ACK do not cause a change in state */
307 DEBUGP("Unknown chunk type, Will stay in %s\n",
308 sctp_conntrack_names[cur_state]);
309 return cur_state;
310 }
311
312 DEBUGP("dir: %d cur_state: %s chunk_type: %d new_state: %s\n",
313 dir, sctp_conntrack_names[cur_state], chunk_type,
314 sctp_conntrack_names[sctp_conntracks[dir][i][cur_state]]);
315
316 return sctp_conntracks[dir][i][cur_state];
317}
318
319/* Returns verdict for packet, or -1 for invalid. */
320static int sctp_packet(struct nf_conn *conntrack,
321 const struct sk_buff *skb,
322 unsigned int dataoff,
323 enum ip_conntrack_info ctinfo,
324 int pf,
325 unsigned int hooknum)
326{
327 enum sctp_conntrack newconntrack, oldsctpstate;
328 sctp_sctphdr_t _sctph, *sh;
329 sctp_chunkhdr_t _sch, *sch;
330 u_int32_t offset, count;
331 char map[256 / sizeof (char)] = {0};
332
333 DEBUGP(__FUNCTION__);
334 DEBUGP("\n");
335
336 sh = skb_header_pointer(skb, dataoff, sizeof(_sctph), &_sctph);
337 if (sh == NULL)
338 return -1;
339
340 if (do_basic_checks(conntrack, skb, dataoff, map) != 0)
341 return -1;
342
343 /* Check the verification tag (Sec 8.5) */
344 if (!test_bit(SCTP_CID_INIT, (void *)map)
345 && !test_bit(SCTP_CID_SHUTDOWN_COMPLETE, (void *)map)
346 && !test_bit(SCTP_CID_COOKIE_ECHO, (void *)map)
347 && !test_bit(SCTP_CID_ABORT, (void *)map)
348 && !test_bit(SCTP_CID_SHUTDOWN_ACK, (void *)map)
349 && (sh->vtag != conntrack->proto.sctp.vtag[CTINFO2DIR(ctinfo)])) {
350 DEBUGP("Verification tag check failed\n");
351 return -1;
352 }
353
354 oldsctpstate = newconntrack = SCTP_CONNTRACK_MAX;
355 for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) {
356 write_lock_bh(&sctp_lock);
357
358 /* Special cases of Verification tag check (Sec 8.5.1) */
359 if (sch->type == SCTP_CID_INIT) {
360 /* Sec 8.5.1 (A) */
361 if (sh->vtag != 0) {
362 write_unlock_bh(&sctp_lock);
363 return -1;
364 }
365 } else if (sch->type == SCTP_CID_ABORT) {
366 /* Sec 8.5.1 (B) */
367 if (!(sh->vtag == conntrack->proto.sctp.vtag[CTINFO2DIR(ctinfo)])
368 && !(sh->vtag == conntrack->proto.sctp.vtag
369 [1 - CTINFO2DIR(ctinfo)])) {
370 write_unlock_bh(&sctp_lock);
371 return -1;
372 }
373 } else if (sch->type == SCTP_CID_SHUTDOWN_COMPLETE) {
374 /* Sec 8.5.1 (C) */
375 if (!(sh->vtag == conntrack->proto.sctp.vtag[CTINFO2DIR(ctinfo)])
376 && !(sh->vtag == conntrack->proto.sctp.vtag
377 [1 - CTINFO2DIR(ctinfo)]
378 && (sch->flags & 1))) {
379 write_unlock_bh(&sctp_lock);
380 return -1;
381 }
382 } else if (sch->type == SCTP_CID_COOKIE_ECHO) {
383 /* Sec 8.5.1 (D) */
384 if (!(sh->vtag == conntrack->proto.sctp.vtag[CTINFO2DIR(ctinfo)])) {
385 write_unlock_bh(&sctp_lock);
386 return -1;
387 }
388 }
389
390 oldsctpstate = conntrack->proto.sctp.state;
391 newconntrack = new_state(CTINFO2DIR(ctinfo), oldsctpstate, sch->type);
392
393 /* Invalid */
394 if (newconntrack == SCTP_CONNTRACK_MAX) {
395 DEBUGP("nf_conntrack_sctp: Invalid dir=%i ctype=%u conntrack=%u\n",
396 CTINFO2DIR(ctinfo), sch->type, oldsctpstate);
397 write_unlock_bh(&sctp_lock);
398 return -1;
399 }
400
401 /* If it is an INIT or an INIT ACK note down the vtag */
402 if (sch->type == SCTP_CID_INIT
403 || sch->type == SCTP_CID_INIT_ACK) {
404 sctp_inithdr_t _inithdr, *ih;
405
406 ih = skb_header_pointer(skb, offset + sizeof(sctp_chunkhdr_t),
407 sizeof(_inithdr), &_inithdr);
408 if (ih == NULL) {
409 write_unlock_bh(&sctp_lock);
410 return -1;
411 }
412 DEBUGP("Setting vtag %x for dir %d\n",
413 ih->init_tag, !CTINFO2DIR(ctinfo));
414 conntrack->proto.sctp.vtag[!CTINFO2DIR(ctinfo)] = ih->init_tag;
415 }
416
417 conntrack->proto.sctp.state = newconntrack;
418 if (oldsctpstate != newconntrack)
419 nf_conntrack_event_cache(IPCT_PROTOINFO, skb);
420 write_unlock_bh(&sctp_lock);
421 }
422
423 nf_ct_refresh_acct(conntrack, ctinfo, skb, *sctp_timeouts[newconntrack]);
424
425 if (oldsctpstate == SCTP_CONNTRACK_COOKIE_ECHOED
426 && CTINFO2DIR(ctinfo) == IP_CT_DIR_REPLY
427 && newconntrack == SCTP_CONNTRACK_ESTABLISHED) {
428 DEBUGP("Setting assured bit\n");
429 set_bit(IPS_ASSURED_BIT, &conntrack->status);
430 nf_conntrack_event_cache(IPCT_STATUS, skb);
431 }
432
433 return NF_ACCEPT;
434}
435
436/* Called when a new connection for this protocol found. */
437static int sctp_new(struct nf_conn *conntrack, const struct sk_buff *skb,
438 unsigned int dataoff)
439{
440 enum sctp_conntrack newconntrack;
441 sctp_sctphdr_t _sctph, *sh;
442 sctp_chunkhdr_t _sch, *sch;
443 u_int32_t offset, count;
444 char map[256 / sizeof (char)] = {0};
445
446 DEBUGP(__FUNCTION__);
447 DEBUGP("\n");
448
449 sh = skb_header_pointer(skb, dataoff, sizeof(_sctph), &_sctph);
450 if (sh == NULL)
451 return 0;
452
453 if (do_basic_checks(conntrack, skb, dataoff, map) != 0)
454 return 0;
455
456 /* If an OOTB packet has any of these chunks discard (Sec 8.4) */
457 if ((test_bit (SCTP_CID_ABORT, (void *)map))
458 || (test_bit (SCTP_CID_SHUTDOWN_COMPLETE, (void *)map))
459 || (test_bit (SCTP_CID_COOKIE_ACK, (void *)map))) {
460 return 0;
461 }
462
463 newconntrack = SCTP_CONNTRACK_MAX;
464 for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) {
465 /* Don't need lock here: this conntrack not in circulation yet */
466 newconntrack = new_state(IP_CT_DIR_ORIGINAL,
467 SCTP_CONNTRACK_NONE, sch->type);
468
469 /* Invalid: delete conntrack */
470 if (newconntrack == SCTP_CONNTRACK_MAX) {
471 DEBUGP("nf_conntrack_sctp: invalid new deleting.\n");
472 return 0;
473 }
474
475 /* Copy the vtag into the state info */
476 if (sch->type == SCTP_CID_INIT) {
477 if (sh->vtag == 0) {
478 sctp_inithdr_t _inithdr, *ih;
479
480 ih = skb_header_pointer(skb, offset + sizeof(sctp_chunkhdr_t),
481 sizeof(_inithdr), &_inithdr);
482 if (ih == NULL)
483 return 0;
484
485 DEBUGP("Setting vtag %x for new conn\n",
486 ih->init_tag);
487
488 conntrack->proto.sctp.vtag[IP_CT_DIR_REPLY] =
489 ih->init_tag;
490 } else {
491 /* Sec 8.5.1 (A) */
492 return 0;
493 }
494 }
495 /* If it is a shutdown ack OOTB packet, we expect a return
496 shutdown complete, otherwise an ABORT Sec 8.4 (5) and (8) */
497 else {
498 DEBUGP("Setting vtag %x for new conn OOTB\n",
499 sh->vtag);
500 conntrack->proto.sctp.vtag[IP_CT_DIR_REPLY] = sh->vtag;
501 }
502
503 conntrack->proto.sctp.state = newconntrack;
504 }
505
506 return 1;
507}
508
509struct nf_conntrack_protocol nf_conntrack_protocol_sctp4 = {
510 .l3proto = PF_INET,
511 .proto = IPPROTO_SCTP,
512 .name = "sctp",
513 .pkt_to_tuple = sctp_pkt_to_tuple,
514 .invert_tuple = sctp_invert_tuple,
515 .print_tuple = sctp_print_tuple,
516 .print_conntrack = sctp_print_conntrack,
517 .packet = sctp_packet,
518 .new = sctp_new,
519 .destroy = NULL,
520 .me = THIS_MODULE
521};
522
523struct nf_conntrack_protocol nf_conntrack_protocol_sctp6 = {
524 .l3proto = PF_INET6,
525 .proto = IPPROTO_SCTP,
526 .name = "sctp",
527 .pkt_to_tuple = sctp_pkt_to_tuple,
528 .invert_tuple = sctp_invert_tuple,
529 .print_tuple = sctp_print_tuple,
530 .print_conntrack = sctp_print_conntrack,
531 .packet = sctp_packet,
532 .new = sctp_new,
533 .destroy = NULL,
534 .me = THIS_MODULE
535};
536
537#ifdef CONFIG_SYSCTL
538static ctl_table nf_ct_sysctl_table[] = {
539 {
540 .ctl_name = NET_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED,
541 .procname = "nf_conntrack_sctp_timeout_closed",
542 .data = &nf_ct_sctp_timeout_closed,
543 .maxlen = sizeof(unsigned int),
544 .mode = 0644,
545 .proc_handler = &proc_dointvec_jiffies,
546 },
547 {
548 .ctl_name = NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT,
549 .procname = "nf_conntrack_sctp_timeout_cookie_wait",
550 .data = &nf_ct_sctp_timeout_cookie_wait,
551 .maxlen = sizeof(unsigned int),
552 .mode = 0644,
553 .proc_handler = &proc_dointvec_jiffies,
554 },
555 {
556 .ctl_name = NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED,
557 .procname = "nf_conntrack_sctp_timeout_cookie_echoed",
558 .data = &nf_ct_sctp_timeout_cookie_echoed,
559 .maxlen = sizeof(unsigned int),
560 .mode = 0644,
561 .proc_handler = &proc_dointvec_jiffies,
562 },
563 {
564 .ctl_name = NET_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED,
565 .procname = "nf_conntrack_sctp_timeout_established",
566 .data = &nf_ct_sctp_timeout_established,
567 .maxlen = sizeof(unsigned int),
568 .mode = 0644,
569 .proc_handler = &proc_dointvec_jiffies,
570 },
571 {
572 .ctl_name = NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT,
573 .procname = "nf_conntrack_sctp_timeout_shutdown_sent",
574 .data = &nf_ct_sctp_timeout_shutdown_sent,
575 .maxlen = sizeof(unsigned int),
576 .mode = 0644,
577 .proc_handler = &proc_dointvec_jiffies,
578 },
579 {
580 .ctl_name = NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD,
581 .procname = "nf_conntrack_sctp_timeout_shutdown_recd",
582 .data = &nf_ct_sctp_timeout_shutdown_recd,
583 .maxlen = sizeof(unsigned int),
584 .mode = 0644,
585 .proc_handler = &proc_dointvec_jiffies,
586 },
587 {
588 .ctl_name = NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT,
589 .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
590 .data = &nf_ct_sctp_timeout_shutdown_ack_sent,
591 .maxlen = sizeof(unsigned int),
592 .mode = 0644,
593 .proc_handler = &proc_dointvec_jiffies,
594 },
595 { .ctl_name = 0 }
596};
597
598static ctl_table nf_ct_netfilter_table[] = {
599 {
600 .ctl_name = NET_NETFILTER,
601 .procname = "netfilter",
602 .mode = 0555,
603 .child = nf_ct_sysctl_table,
604 },
605 { .ctl_name = 0 }
606};
607
608static ctl_table nf_ct_net_table[] = {
609 {
610 .ctl_name = CTL_NET,
611 .procname = "net",
612 .mode = 0555,
613 .child = nf_ct_netfilter_table,
614 },
615 { .ctl_name = 0 }
616};
617
618static struct ctl_table_header *nf_ct_sysctl_header;
619#endif
620
65b4b4e8 621int __init nf_conntrack_proto_sctp_init(void)
9fb9cbb1
YK		 622{
623 int ret;
624
625 ret = nf_conntrack_protocol_register(&nf_conntrack_protocol_sctp4);
626 if (ret) {
627 printk("nf_conntrack_proto_sctp4: protocol register failed\n");
628 goto out;
629 }
630 ret = nf_conntrack_protocol_register(&nf_conntrack_protocol_sctp6);
631 if (ret) {
632 printk("nf_conntrack_proto_sctp6: protocol register failed\n");
633 goto cleanup_sctp4;
634 }
635
636#ifdef CONFIG_SYSCTL
637 nf_ct_sysctl_header = register_sysctl_table(nf_ct_net_table, 0);
638 if (nf_ct_sysctl_header == NULL) {
639 printk("nf_conntrack_proto_sctp: can't register to sysctl.\n");
640 goto cleanup;
641 }
642#endif
643
644 return ret;
645
646#ifdef CONFIG_SYSCTL
647 cleanup:
648 nf_conntrack_protocol_unregister(&nf_conntrack_protocol_sctp6);
649#endif
650 cleanup_sctp4:
651 nf_conntrack_protocol_unregister(&nf_conntrack_protocol_sctp4);
652 out:
653 DEBUGP("SCTP conntrack module loading %s\n",
654 ret ? "failed": "succeeded");
655 return ret;
656}
657
65b4b4e8 658void __exit nf_conntrack_proto_sctp_fini(void)
9fb9cbb1
YK		 659{
660 nf_conntrack_protocol_unregister(&nf_conntrack_protocol_sctp6);
661 nf_conntrack_protocol_unregister(&nf_conntrack_protocol_sctp4);
662#ifdef CONFIG_SYSCTL
663 unregister_sysctl_table(nf_ct_sysctl_header);
664#endif
665 DEBUGP("SCTP conntrack module unloaded\n");
666}
667
65b4b4e8
AM		 668module_init(nf_conntrack_proto_sctp_init);
669module_exit(nf_conntrack_proto_sctp_fini);
9fb9cbb1
YK		 670
671MODULE_LICENSE("GPL");
672MODULE_AUTHOR("Kiran Kumar Immidi");
673MODULE_DESCRIPTION("Netfilter connection tracking protocol helper for SCTP");
Linux kernel - Deliverables
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