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backlight: Allow drivers to update the core, and generate events on changes
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / netfilter / nf_conntrack_proto_sctp.c
blob74e03790119989df87cd1a95e8a80280f1c85764
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
12 #include <linux/types.h>
13 #include <linux/timer.h>
14 #include <linux/netfilter.h>
15 #include <linux/module.h>
16 #include <linux/in.h>
17 #include <linux/ip.h>
18 #include <linux/sctp.h>
19 #include <linux/string.h>
20 #include <linux/seq_file.h>
21 #include <linux/spinlock.h>
22 #include <linux/interrupt.h>
23
24 #include <net/netfilter/nf_conntrack.h>
25 #include <net/netfilter/nf_conntrack_l4proto.h>
26 #include <net/netfilter/nf_conntrack_ecache.h>
27
28 /* Protects ct->proto.sctp */
29 static DEFINE_RWLOCK(sctp_lock);
30
31 /* FIXME: Examine ipfilter's timeouts and conntrack transitions more
32 closely. They're more complex. --RR
33
34 And so for me for SCTP :D -Kiran */
35
36 static const char *const sctp_conntrack_names[] = {
37 "NONE",
38 "CLOSED",
39 "COOKIE_WAIT",
40 "COOKIE_ECHOED",
41 "ESTABLISHED",
42 "SHUTDOWN_SENT",
43 "SHUTDOWN_RECD",
44 "SHUTDOWN_ACK_SENT",
45 };
46
47 #define SECS * HZ
48 #define MINS * 60 SECS
49 #define HOURS * 60 MINS
50 #define DAYS * 24 HOURS
51
52 static unsigned int sctp_timeouts[SCTP_CONNTRACK_MAX] __read_mostly = {
53 [SCTP_CONNTRACK_CLOSED] = 10 SECS,
54 [SCTP_CONNTRACK_COOKIE_WAIT] = 3 SECS,
55 [SCTP_CONNTRACK_COOKIE_ECHOED] = 3 SECS,
56 [SCTP_CONNTRACK_ESTABLISHED] = 5 DAYS,
57 [SCTP_CONNTRACK_SHUTDOWN_SENT] = 300 SECS / 1000,
58 [SCTP_CONNTRACK_SHUTDOWN_RECD] = 300 SECS / 1000,
59 [SCTP_CONNTRACK_SHUTDOWN_ACK_SENT] = 3 SECS,
60 };
61
62 #define sNO SCTP_CONNTRACK_NONE
63 #define sCL SCTP_CONNTRACK_CLOSED
64 #define sCW SCTP_CONNTRACK_COOKIE_WAIT
65 #define sCE SCTP_CONNTRACK_COOKIE_ECHOED
66 #define sES SCTP_CONNTRACK_ESTABLISHED
67 #define sSS SCTP_CONNTRACK_SHUTDOWN_SENT
68 #define sSR SCTP_CONNTRACK_SHUTDOWN_RECD
69 #define sSA SCTP_CONNTRACK_SHUTDOWN_ACK_SENT
70 #define sIV SCTP_CONNTRACK_MAX
71
72 /*
73 These are the descriptions of the states:
74
75 NOTE: These state names are tantalizingly similar to the states of an
76 SCTP endpoint. But the interpretation of the states is a little different,
77 considering that these are the states of the connection and not of an end
78 point. Please note the subtleties. -Kiran
79
80 NONE - Nothing so far.
81 COOKIE WAIT - We have seen an INIT chunk in the original direction, or also
82 an INIT_ACK chunk in the reply direction.
83 COOKIE ECHOED - We have seen a COOKIE_ECHO chunk in the original direction.
84 ESTABLISHED - We have seen a COOKIE_ACK in the reply direction.
85 SHUTDOWN_SENT - We have seen a SHUTDOWN chunk in the original direction.
86 SHUTDOWN_RECD - We have seen a SHUTDOWN chunk in the reply directoin.
87 SHUTDOWN_ACK_SENT - We have seen a SHUTDOWN_ACK chunk in the direction opposite
88 to that of the SHUTDOWN chunk.
89 CLOSED - We have seen a SHUTDOWN_COMPLETE chunk in the direction of
90 the SHUTDOWN chunk. Connection is closed.
91 */
92
93 /* TODO
94 - I have assumed that the first INIT is in the original direction.
95 This messes things when an INIT comes in the reply direction in CLOSED
96 state.
97 - Check the error type in the reply dir before transitioning from
98 cookie echoed to closed.
99 - Sec 5.2.4 of RFC 2960
100 - Multi Homing support.
101 */
102
103 /* SCTP conntrack state transitions */
104 static const u8 sctp_conntracks[2][9][SCTP_CONNTRACK_MAX] = {
105 {
106 /* ORIGINAL */
107 /* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA */
108 /* init */ {sCW, sCW, sCW, sCE, sES, sSS, sSR, sSA},
109 /* init_ack */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA},
110 /* abort */ {sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL},
111 /* shutdown */ {sCL, sCL, sCW, sCE, sSS, sSS, sSR, sSA},
112 /* shutdown_ack */ {sSA, sCL, sCW, sCE, sES, sSA, sSA, sSA},
113 /* error */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA},/* Cant have Stale cookie*/
114 /* cookie_echo */ {sCL, sCL, sCE, sCE, sES, sSS, sSR, sSA},/* 5.2.4 - Big TODO */
115 /* cookie_ack */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA},/* Cant come in orig dir */
116 /* shutdown_comp*/ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sCL}
117 },
118 {
119 /* REPLY */
120 /* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA */
121 /* init */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA},/* INIT in sCL Big TODO */
122 /* init_ack */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA},
123 /* abort */ {sIV, sCL, sCL, sCL, sCL, sCL, sCL, sCL},
124 /* shutdown */ {sIV, sCL, sCW, sCE, sSR, sSS, sSR, sSA},
125 /* shutdown_ack */ {sIV, sCL, sCW, sCE, sES, sSA, sSA, sSA},
126 /* error */ {sIV, sCL, sCW, sCL, sES, sSS, sSR, sSA},
127 /* cookie_echo */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA},/* Cant come in reply dir */
128 /* cookie_ack */ {sIV, sCL, sCW, sES, sES, sSS, sSR, sSA},
129 /* shutdown_comp*/ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sCL}
130 }
131 };
132
133 static bool sctp_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff,
134 struct nf_conntrack_tuple *tuple)
135 {
136 const struct sctphdr *hp;
137 struct sctphdr _hdr;
138
139 /* Actually only need first 8 bytes. */
140 hp = skb_header_pointer(skb, dataoff, 8, &_hdr);
141 if (hp == NULL)
142 return false;
143
144 tuple->src.u.sctp.port = hp->source;
145 tuple->dst.u.sctp.port = hp->dest;
146 return true;
147 }
148
149 static bool sctp_invert_tuple(struct nf_conntrack_tuple *tuple,
150 const struct nf_conntrack_tuple *orig)
151 {
152 tuple->src.u.sctp.port = orig->dst.u.sctp.port;
153 tuple->dst.u.sctp.port = orig->src.u.sctp.port;
154 return true;
155 }
156
157 /* Print out the per-protocol part of the tuple. */
158 static int sctp_print_tuple(struct seq_file *s,
159 const struct nf_conntrack_tuple *tuple)
160 {
161 return seq_printf(s, "sport=%hu dport=%hu ",
162 ntohs(tuple->src.u.sctp.port),
163 ntohs(tuple->dst.u.sctp.port));
164 }
165
166 /* Print out the private part of the conntrack. */
167 static int sctp_print_conntrack(struct seq_file *s, const struct nf_conn *ct)
168 {
169 enum sctp_conntrack state;
170
171 read_lock_bh(&sctp_lock);
172 state = ct->proto.sctp.state;
173 read_unlock_bh(&sctp_lock);
174
175 return seq_printf(s, "%s ", sctp_conntrack_names[state]);
176 }
177
178 #define for_each_sctp_chunk(skb, sch, _sch, offset, dataoff, count) \
179 for ((offset) = (dataoff) + sizeof(sctp_sctphdr_t), (count) = 0; \
180 (offset) < (skb)->len && \
181 ((sch) = skb_header_pointer((skb), (offset), sizeof(_sch), &(_sch))); \
182 (offset) += (ntohs((sch)->length) + 3) & ~3, (count)++)
183
184 /* Some validity checks to make sure the chunks are fine */
185 static int do_basic_checks(struct nf_conn *ct,
186 const struct sk_buff *skb,
187 unsigned int dataoff,
188 unsigned long *map)
189 {
190 u_int32_t offset, count;
191 sctp_chunkhdr_t _sch, *sch;
192 int flag;
193
194 flag = 0;
195
196 for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) {
197 pr_debug("Chunk Num: %d Type: %d\n", count, sch->type);
198
199 if (sch->type == SCTP_CID_INIT ||
200 sch->type == SCTP_CID_INIT_ACK ||
201 sch->type == SCTP_CID_SHUTDOWN_COMPLETE)
202 flag = 1;
203
204 /*
205 * Cookie Ack/Echo chunks not the first OR
206 * Init / Init Ack / Shutdown compl chunks not the only chunks
207 * OR zero-length.
208 */
209 if (((sch->type == SCTP_CID_COOKIE_ACK ||
210 sch->type == SCTP_CID_COOKIE_ECHO ||
211 flag) &&
212 count != 0) || !sch->length) {
213 pr_debug("Basic checks failed\n");
214 return 1;
215 }
216
217 if (map)
218 set_bit(sch->type, map);
219 }
220
221 pr_debug("Basic checks passed\n");
222 return count == 0;
223 }
224
225 static int sctp_new_state(enum ip_conntrack_dir dir,
226 enum sctp_conntrack cur_state,
227 int chunk_type)
228 {
229 int i;
230
231 pr_debug("Chunk type: %d\n", chunk_type);
232
233 switch (chunk_type) {
234 case SCTP_CID_INIT:
235 pr_debug("SCTP_CID_INIT\n");
236 i = 0;
237 break;
238 case SCTP_CID_INIT_ACK:
239 pr_debug("SCTP_CID_INIT_ACK\n");
240 i = 1;
241 break;
242 case SCTP_CID_ABORT:
243 pr_debug("SCTP_CID_ABORT\n");
244 i = 2;
245 break;
246 case SCTP_CID_SHUTDOWN:
247 pr_debug("SCTP_CID_SHUTDOWN\n");
248 i = 3;
249 break;
250 case SCTP_CID_SHUTDOWN_ACK:
251 pr_debug("SCTP_CID_SHUTDOWN_ACK\n");
252 i = 4;
253 break;
254 case SCTP_CID_ERROR:
255 pr_debug("SCTP_CID_ERROR\n");
256 i = 5;
257 break;
258 case SCTP_CID_COOKIE_ECHO:
259 pr_debug("SCTP_CID_COOKIE_ECHO\n");
260 i = 6;
261 break;
262 case SCTP_CID_COOKIE_ACK:
263 pr_debug("SCTP_CID_COOKIE_ACK\n");
264 i = 7;
265 break;
266 case SCTP_CID_SHUTDOWN_COMPLETE:
267 pr_debug("SCTP_CID_SHUTDOWN_COMPLETE\n");
268 i = 8;
269 break;
270 default:
271 /* Other chunks like DATA, SACK, HEARTBEAT and
272 its ACK do not cause a change in state */
273 pr_debug("Unknown chunk type, Will stay in %s\n",
274 sctp_conntrack_names[cur_state]);
275 return cur_state;
276 }
277
278 pr_debug("dir: %d cur_state: %s chunk_type: %d new_state: %s\n",
279 dir, sctp_conntrack_names[cur_state], chunk_type,
280 sctp_conntrack_names[sctp_conntracks[dir][i][cur_state]]);
281
282 return sctp_conntracks[dir][i][cur_state];
283 }
284
285 /* Returns verdict for packet, or -NF_ACCEPT for invalid. */
286 static int sctp_packet(struct nf_conn *ct,
287 const struct sk_buff *skb,
288 unsigned int dataoff,
289 enum ip_conntrack_info ctinfo,
290 u_int8_t pf,
291 unsigned int hooknum)
292 {
293 enum sctp_conntrack new_state, old_state;
294 enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
295 const struct sctphdr *sh;
296 struct sctphdr _sctph;
297 const struct sctp_chunkhdr *sch;
298 struct sctp_chunkhdr _sch;
299 u_int32_t offset, count;
300 unsigned long map[256 / sizeof(unsigned long)] = { 0 };
301
302 sh = skb_header_pointer(skb, dataoff, sizeof(_sctph), &_sctph);
303 if (sh == NULL)
304 goto out;
305
306 if (do_basic_checks(ct, skb, dataoff, map) != 0)
307 goto out;
308
309 /* Check the verification tag (Sec 8.5) */
310 if (!test_bit(SCTP_CID_INIT, map) &&
311 !test_bit(SCTP_CID_SHUTDOWN_COMPLETE, map) &&
312 !test_bit(SCTP_CID_COOKIE_ECHO, map) &&
313 !test_bit(SCTP_CID_ABORT, map) &&
314 !test_bit(SCTP_CID_SHUTDOWN_ACK, map) &&
315 sh->vtag != ct->proto.sctp.vtag[dir]) {
316 pr_debug("Verification tag check failed\n");
317 goto out;
318 }
319
320 old_state = new_state = SCTP_CONNTRACK_NONE;
321 write_lock_bh(&sctp_lock);
322 for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) {
323 /* Special cases of Verification tag check (Sec 8.5.1) */
324 if (sch->type == SCTP_CID_INIT) {
325 /* Sec 8.5.1 (A) */
326 if (sh->vtag != 0)
327 goto out_unlock;
328 } else if (sch->type == SCTP_CID_ABORT) {
329 /* Sec 8.5.1 (B) */
330 if (sh->vtag != ct->proto.sctp.vtag[dir] &&
331 sh->vtag != ct->proto.sctp.vtag[!dir])
332 goto out_unlock;
333 } else if (sch->type == SCTP_CID_SHUTDOWN_COMPLETE) {
334 /* Sec 8.5.1 (C) */
335 if (sh->vtag != ct->proto.sctp.vtag[dir] &&
336 sh->vtag != ct->proto.sctp.vtag[!dir] &&
337 sch->flags & SCTP_CHUNK_FLAG_T)
338 goto out_unlock;
339 } else if (sch->type == SCTP_CID_COOKIE_ECHO) {
340 /* Sec 8.5.1 (D) */
341 if (sh->vtag != ct->proto.sctp.vtag[dir])
342 goto out_unlock;
343 }
344
345 old_state = ct->proto.sctp.state;
346 new_state = sctp_new_state(dir, old_state, sch->type);
347
348 /* Invalid */
349 if (new_state == SCTP_CONNTRACK_MAX) {
350 pr_debug("nf_conntrack_sctp: Invalid dir=%i ctype=%u "
351 "conntrack=%u\n",
352 dir, sch->type, old_state);
353 goto out_unlock;
354 }
355
356 /* If it is an INIT or an INIT ACK note down the vtag */
357 if (sch->type == SCTP_CID_INIT ||
358 sch->type == SCTP_CID_INIT_ACK) {
359 sctp_inithdr_t _inithdr, *ih;
360
361 ih = skb_header_pointer(skb, offset + sizeof(sctp_chunkhdr_t),
362 sizeof(_inithdr), &_inithdr);
363 if (ih == NULL)
364 goto out_unlock;
365 pr_debug("Setting vtag %x for dir %d\n",
366 ih->init_tag, !dir);
367 ct->proto.sctp.vtag[!dir] = ih->init_tag;
368 }
369
370 ct->proto.sctp.state = new_state;
371 if (old_state != new_state)
372 nf_conntrack_event_cache(IPCT_PROTOINFO, ct);
373 }
374 write_unlock_bh(&sctp_lock);
375
376 nf_ct_refresh_acct(ct, ctinfo, skb, sctp_timeouts[new_state]);
377
378 if (old_state == SCTP_CONNTRACK_COOKIE_ECHOED &&
379 dir == IP_CT_DIR_REPLY &&
380 new_state == SCTP_CONNTRACK_ESTABLISHED) {
381 pr_debug("Setting assured bit\n");
382 set_bit(IPS_ASSURED_BIT, &ct->status);
383 nf_conntrack_event_cache(IPCT_STATUS, ct);
384 }
385
386 return NF_ACCEPT;
387
388 out_unlock:
389 write_unlock_bh(&sctp_lock);
390 out:
391 return -NF_ACCEPT;
392 }
393
394 /* Called when a new connection for this protocol found. */
395 static bool sctp_new(struct nf_conn *ct, const struct sk_buff *skb,
396 unsigned int dataoff)
397 {
398 enum sctp_conntrack new_state;
399 const struct sctphdr *sh;
400 struct sctphdr _sctph;
401 const struct sctp_chunkhdr *sch;
402 struct sctp_chunkhdr _sch;
403 u_int32_t offset, count;
404 unsigned long map[256 / sizeof(unsigned long)] = { 0 };
405
406 sh = skb_header_pointer(skb, dataoff, sizeof(_sctph), &_sctph);
407 if (sh == NULL)
408 return false;
409
410 if (do_basic_checks(ct, skb, dataoff, map) != 0)
411 return false;
412
413 /* If an OOTB packet has any of these chunks discard (Sec 8.4) */
414 if (test_bit(SCTP_CID_ABORT, map) ||
415 test_bit(SCTP_CID_SHUTDOWN_COMPLETE, map) ||
416 test_bit(SCTP_CID_COOKIE_ACK, map))
417 return false;
418
419 new_state = SCTP_CONNTRACK_MAX;
420 for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) {
421 /* Don't need lock here: this conntrack not in circulation yet */
422 new_state = sctp_new_state(IP_CT_DIR_ORIGINAL,
423 SCTP_CONNTRACK_NONE, sch->type);
424
425 /* Invalid: delete conntrack */
426 if (new_state == SCTP_CONNTRACK_NONE ||
427 new_state == SCTP_CONNTRACK_MAX) {
428 pr_debug("nf_conntrack_sctp: invalid new deleting.\n");
429 return false;
430 }
431
432 /* Copy the vtag into the state info */
433 if (sch->type == SCTP_CID_INIT) {
434 if (sh->vtag == 0) {
435 sctp_inithdr_t _inithdr, *ih;
436
437 ih = skb_header_pointer(skb, offset + sizeof(sctp_chunkhdr_t),
438 sizeof(_inithdr), &_inithdr);
439 if (ih == NULL)
440 return false;
441
442 pr_debug("Setting vtag %x for new conn\n",
443 ih->init_tag);
444
445 ct->proto.sctp.vtag[IP_CT_DIR_REPLY] =
446 ih->init_tag;
447 } else {
448 /* Sec 8.5.1 (A) */
449 return false;
450 }
451 }
452 /* If it is a shutdown ack OOTB packet, we expect a return
453 shutdown complete, otherwise an ABORT Sec 8.4 (5) and (8) */
454 else {
455 pr_debug("Setting vtag %x for new conn OOTB\n",
456 sh->vtag);
457 ct->proto.sctp.vtag[IP_CT_DIR_REPLY] = sh->vtag;
458 }
459
460 ct->proto.sctp.state = new_state;
461 }
462
463 return true;
464 }
465
466 #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
467
468 #include <linux/netfilter/nfnetlink.h>
469 #include <linux/netfilter/nfnetlink_conntrack.h>
470
471 static int sctp_to_nlattr(struct sk_buff *skb, struct nlattr *nla,
472 const struct nf_conn *ct)
473 {
474 struct nlattr *nest_parms;
475
476 read_lock_bh(&sctp_lock);
477 nest_parms = nla_nest_start(skb, CTA_PROTOINFO_SCTP | NLA_F_NESTED);
478 if (!nest_parms)
479 goto nla_put_failure;
480
481 NLA_PUT_U8(skb, CTA_PROTOINFO_SCTP_STATE, ct->proto.sctp.state);
482
483 NLA_PUT_BE32(skb,
484 CTA_PROTOINFO_SCTP_VTAG_ORIGINAL,
485 ct->proto.sctp.vtag[IP_CT_DIR_ORIGINAL]);
486
487 NLA_PUT_BE32(skb,
488 CTA_PROTOINFO_SCTP_VTAG_REPLY,
489 ct->proto.sctp.vtag[IP_CT_DIR_REPLY]);
490
491 read_unlock_bh(&sctp_lock);
492
493 nla_nest_end(skb, nest_parms);
494
495 return 0;
496
497 nla_put_failure:
498 read_unlock_bh(&sctp_lock);
499 return -1;
500 }
501
502 static const struct nla_policy sctp_nla_policy[CTA_PROTOINFO_SCTP_MAX+1] = {
503 [CTA_PROTOINFO_SCTP_STATE] = { .type = NLA_U8 },
504 [CTA_PROTOINFO_SCTP_VTAG_ORIGINAL] = { .type = NLA_U32 },
505 [CTA_PROTOINFO_SCTP_VTAG_REPLY] = { .type = NLA_U32 },
506 };
507
508 static int nlattr_to_sctp(struct nlattr *cda[], struct nf_conn *ct)
509 {
510 struct nlattr *attr = cda[CTA_PROTOINFO_SCTP];
511 struct nlattr *tb[CTA_PROTOINFO_SCTP_MAX+1];
512 int err;
513
514 /* updates may not contain the internal protocol info, skip parsing */
515 if (!attr)
516 return 0;
517
518 err = nla_parse_nested(tb,
519 CTA_PROTOINFO_SCTP_MAX,
520 attr,
521 sctp_nla_policy);
522 if (err < 0)
523 return err;
524
525 if (!tb[CTA_PROTOINFO_SCTP_STATE] ||
526 !tb[CTA_PROTOINFO_SCTP_VTAG_ORIGINAL] ||
527 !tb[CTA_PROTOINFO_SCTP_VTAG_REPLY])
528 return -EINVAL;
529
530 write_lock_bh(&sctp_lock);
531 ct->proto.sctp.state = nla_get_u8(tb[CTA_PROTOINFO_SCTP_STATE]);
532 ct->proto.sctp.vtag[IP_CT_DIR_ORIGINAL] =
533 nla_get_be32(tb[CTA_PROTOINFO_SCTP_VTAG_ORIGINAL]);
534 ct->proto.sctp.vtag[IP_CT_DIR_REPLY] =
535 nla_get_be32(tb[CTA_PROTOINFO_SCTP_VTAG_REPLY]);
536 write_unlock_bh(&sctp_lock);
537
538 return 0;
539 }
540 #endif
541
542 #ifdef CONFIG_SYSCTL
543 static unsigned int sctp_sysctl_table_users;
544 static struct ctl_table_header *sctp_sysctl_header;
545 static struct ctl_table sctp_sysctl_table[] = {
546 {
547 .procname = "nf_conntrack_sctp_timeout_closed",
548 .data = &sctp_timeouts[SCTP_CONNTRACK_CLOSED],
549 .maxlen = sizeof(unsigned int),
550 .mode = 0644,
551 .proc_handler = proc_dointvec_jiffies,
552 },
553 {
554 .procname = "nf_conntrack_sctp_timeout_cookie_wait",
555 .data = &sctp_timeouts[SCTP_CONNTRACK_COOKIE_WAIT],
556 .maxlen = sizeof(unsigned int),
557 .mode = 0644,
558 .proc_handler = proc_dointvec_jiffies,
559 },
560 {
561 .procname = "nf_conntrack_sctp_timeout_cookie_echoed",
562 .data = &sctp_timeouts[SCTP_CONNTRACK_COOKIE_ECHOED],
563 .maxlen = sizeof(unsigned int),
564 .mode = 0644,
565 .proc_handler = proc_dointvec_jiffies,
566 },
567 {
568 .procname = "nf_conntrack_sctp_timeout_established",
569 .data = &sctp_timeouts[SCTP_CONNTRACK_ESTABLISHED],
570 .maxlen = sizeof(unsigned int),
571 .mode = 0644,
572 .proc_handler = proc_dointvec_jiffies,
573 },
574 {
575 .procname = "nf_conntrack_sctp_timeout_shutdown_sent",
576 .data = &sctp_timeouts[SCTP_CONNTRACK_SHUTDOWN_SENT],
577 .maxlen = sizeof(unsigned int),
578 .mode = 0644,
579 .proc_handler = proc_dointvec_jiffies,
580 },
581 {
582 .procname = "nf_conntrack_sctp_timeout_shutdown_recd",
583 .data = &sctp_timeouts[SCTP_CONNTRACK_SHUTDOWN_RECD],
584 .maxlen = sizeof(unsigned int),
585 .mode = 0644,
586 .proc_handler = proc_dointvec_jiffies,
587 },
588 {
589 .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
590 .data = &sctp_timeouts[SCTP_CONNTRACK_SHUTDOWN_ACK_SENT],
591 .maxlen = sizeof(unsigned int),
592 .mode = 0644,
593 .proc_handler = proc_dointvec_jiffies,
594 },
595 {
596 .ctl_name = 0
597 }
598 };
599
600 #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
601 static struct ctl_table sctp_compat_sysctl_table[] = {
602 {
603 .procname = "ip_conntrack_sctp_timeout_closed",
604 .data = &sctp_timeouts[SCTP_CONNTRACK_CLOSED],
605 .maxlen = sizeof(unsigned int),
606 .mode = 0644,
607 .proc_handler = proc_dointvec_jiffies,
608 },
609 {
610 .procname = "ip_conntrack_sctp_timeout_cookie_wait",
611 .data = &sctp_timeouts[SCTP_CONNTRACK_COOKIE_WAIT],
612 .maxlen = sizeof(unsigned int),
613 .mode = 0644,
614 .proc_handler = proc_dointvec_jiffies,
615 },
616 {
617 .procname = "ip_conntrack_sctp_timeout_cookie_echoed",
618 .data = &sctp_timeouts[SCTP_CONNTRACK_COOKIE_ECHOED],
619 .maxlen = sizeof(unsigned int),
620 .mode = 0644,
621 .proc_handler = proc_dointvec_jiffies,
622 },
623 {
624 .procname = "ip_conntrack_sctp_timeout_established",
625 .data = &sctp_timeouts[SCTP_CONNTRACK_ESTABLISHED],
626 .maxlen = sizeof(unsigned int),
627 .mode = 0644,
628 .proc_handler = proc_dointvec_jiffies,
629 },
630 {
631 .procname = "ip_conntrack_sctp_timeout_shutdown_sent",
632 .data = &sctp_timeouts[SCTP_CONNTRACK_SHUTDOWN_SENT],
633 .maxlen = sizeof(unsigned int),
634 .mode = 0644,
635 .proc_handler = proc_dointvec_jiffies,
636 },
637 {
638 .procname = "ip_conntrack_sctp_timeout_shutdown_recd",
639 .data = &sctp_timeouts[SCTP_CONNTRACK_SHUTDOWN_RECD],
640 .maxlen = sizeof(unsigned int),
641 .mode = 0644,
642 .proc_handler = proc_dointvec_jiffies,
643 },
644 {
645 .procname = "ip_conntrack_sctp_timeout_shutdown_ack_sent",
646 .data = &sctp_timeouts[SCTP_CONNTRACK_SHUTDOWN_ACK_SENT],
647 .maxlen = sizeof(unsigned int),
648 .mode = 0644,
649 .proc_handler = proc_dointvec_jiffies,
650 },
651 {
652 .ctl_name = 0
653 }
654 };
655 #endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
656 #endif
657
658 static struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp4 __read_mostly = {
659 .l3proto = PF_INET,
660 .l4proto = IPPROTO_SCTP,
661 .name = "sctp",
662 .pkt_to_tuple = sctp_pkt_to_tuple,
663 .invert_tuple = sctp_invert_tuple,
664 .print_tuple = sctp_print_tuple,
665 .print_conntrack = sctp_print_conntrack,
666 .packet = sctp_packet,
667 .new = sctp_new,
668 .me = THIS_MODULE,
669 #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
670 .to_nlattr = sctp_to_nlattr,
671 .from_nlattr = nlattr_to_sctp,
672 .tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
673 .nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
674 .nla_policy = nf_ct_port_nla_policy,
675 #endif
676 #ifdef CONFIG_SYSCTL
677 .ctl_table_users = &sctp_sysctl_table_users,
678 .ctl_table_header = &sctp_sysctl_header,
679 .ctl_table = sctp_sysctl_table,
680 #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
681 .ctl_compat_table = sctp_compat_sysctl_table,
682 #endif
683 #endif
684 };
685
686 static struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp6 __read_mostly = {
687 .l3proto = PF_INET6,
688 .l4proto = IPPROTO_SCTP,
689 .name = "sctp",
690 .pkt_to_tuple = sctp_pkt_to_tuple,
691 .invert_tuple = sctp_invert_tuple,
692 .print_tuple = sctp_print_tuple,
693 .print_conntrack = sctp_print_conntrack,
694 .packet = sctp_packet,
695 .new = sctp_new,
696 .me = THIS_MODULE,
697 #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
698 .to_nlattr = sctp_to_nlattr,
699 .from_nlattr = nlattr_to_sctp,
700 .tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
701 .nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
702 .nla_policy = nf_ct_port_nla_policy,
703 #endif
704 #ifdef CONFIG_SYSCTL
705 .ctl_table_users = &sctp_sysctl_table_users,
706 .ctl_table_header = &sctp_sysctl_header,
707 .ctl_table = sctp_sysctl_table,
708 #endif
709 };
710
711 static int __init nf_conntrack_proto_sctp_init(void)
712 {
713 int ret;
714
715 ret = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_sctp4);
716 if (ret) {
717 printk("nf_conntrack_l4proto_sctp4: protocol register failed\n");
718 goto out;
719 }
720 ret = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_sctp6);
721 if (ret) {
722 printk("nf_conntrack_l4proto_sctp6: protocol register failed\n");
723 goto cleanup_sctp4;
724 }
725
726 return ret;
727
728 cleanup_sctp4:
729 nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_sctp4);
730 out:
731 return ret;
732 }
733
734 static void __exit nf_conntrack_proto_sctp_fini(void)
735 {
736 nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_sctp6);
737 nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_sctp4);
738 }
739
740 module_init(nf_conntrack_proto_sctp_init);
741 module_exit(nf_conntrack_proto_sctp_fini);
742
743 MODULE_LICENSE("GPL");
744 MODULE_AUTHOR("Kiran Kumar Immidi");
745 MODULE_DESCRIPTION("Netfilter connection tracking protocol helper for SCTP");
746 MODULE_ALIAS("ip_conntrack_proto_sctp");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree