2 * Connection tracking protocol helper module for SCTP.
4 * SCTP is defined in RFC 2960. References to various sections in this code
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.
12 #include <linux/types.h>
13 #include <linux/timer.h>
14 #include <linux/netfilter.h>
15 #include <linux/module.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>
24 #include <net/netfilter/nf_conntrack.h>
25 #include <net/netfilter/nf_conntrack_l4proto.h>
26 #include <net/netfilter/nf_conntrack_ecache.h>
28 /* Protects conntrack->proto.sctp */
29 static DEFINE_RWLOCK(sctp_lock
);
31 /* FIXME: Examine ipfilter's timeouts and conntrack transitions more
32 closely. They're more complex. --RR
34 And so for me for SCTP :D -Kiran */
36 static const char *sctp_conntrack_names
[] = {
48 #define MINS * 60 SECS
49 #define HOURS * 60 MINS
50 #define DAYS * 24 HOURS
52 static unsigned int nf_ct_sctp_timeout_closed __read_mostly
= 10 SECS
;
53 static unsigned int nf_ct_sctp_timeout_cookie_wait __read_mostly
= 3 SECS
;
54 static unsigned int nf_ct_sctp_timeout_cookie_echoed __read_mostly
= 3 SECS
;
55 static unsigned int nf_ct_sctp_timeout_established __read_mostly
= 5 DAYS
;
56 static unsigned int nf_ct_sctp_timeout_shutdown_sent __read_mostly
= 300 SECS
/ 1000;
57 static unsigned int nf_ct_sctp_timeout_shutdown_recd __read_mostly
= 300 SECS
/ 1000;
58 static unsigned int nf_ct_sctp_timeout_shutdown_ack_sent __read_mostly
= 3 SECS
;
60 static unsigned int * sctp_timeouts
[]
61 = { NULL
, /* SCTP_CONNTRACK_NONE */
62 &nf_ct_sctp_timeout_closed
, /* SCTP_CONNTRACK_CLOSED */
63 &nf_ct_sctp_timeout_cookie_wait
, /* SCTP_CONNTRACK_COOKIE_WAIT */
64 &nf_ct_sctp_timeout_cookie_echoed
, /* SCTP_CONNTRACK_COOKIE_ECHOED */
65 &nf_ct_sctp_timeout_established
, /* SCTP_CONNTRACK_ESTABLISHED */
66 &nf_ct_sctp_timeout_shutdown_sent
, /* SCTP_CONNTRACK_SHUTDOWN_SENT */
67 &nf_ct_sctp_timeout_shutdown_recd
, /* SCTP_CONNTRACK_SHUTDOWN_RECD */
68 &nf_ct_sctp_timeout_shutdown_ack_sent
/* SCTP_CONNTRACK_SHUTDOWN_ACK_SENT */
71 #define sNO SCTP_CONNTRACK_NONE
72 #define sCL SCTP_CONNTRACK_CLOSED
73 #define sCW SCTP_CONNTRACK_COOKIE_WAIT
74 #define sCE SCTP_CONNTRACK_COOKIE_ECHOED
75 #define sES SCTP_CONNTRACK_ESTABLISHED
76 #define sSS SCTP_CONNTRACK_SHUTDOWN_SENT
77 #define sSR SCTP_CONNTRACK_SHUTDOWN_RECD
78 #define sSA SCTP_CONNTRACK_SHUTDOWN_ACK_SENT
79 #define sIV SCTP_CONNTRACK_MAX
82 These are the descriptions of the states:
84 NOTE: These state names are tantalizingly similar to the states of an
85 SCTP endpoint. But the interpretation of the states is a little different,
86 considering that these are the states of the connection and not of an end
87 point. Please note the subtleties. -Kiran
89 NONE - Nothing so far.
90 COOKIE WAIT - We have seen an INIT chunk in the original direction, or also
91 an INIT_ACK chunk in the reply direction.
92 COOKIE ECHOED - We have seen a COOKIE_ECHO chunk in the original direction.
93 ESTABLISHED - We have seen a COOKIE_ACK in the reply direction.
94 SHUTDOWN_SENT - We have seen a SHUTDOWN chunk in the original direction.
95 SHUTDOWN_RECD - We have seen a SHUTDOWN chunk in the reply directoin.
96 SHUTDOWN_ACK_SENT - We have seen a SHUTDOWN_ACK chunk in the direction opposite
97 to that of the SHUTDOWN chunk.
98 CLOSED - We have seen a SHUTDOWN_COMPLETE chunk in the direction of
99 the SHUTDOWN chunk. Connection is closed.
103 - I have assumed that the first INIT is in the original direction.
104 This messes things when an INIT comes in the reply direction in CLOSED
106 - Check the error type in the reply dir before transitioning from
107 cookie echoed to closed.
108 - Sec 5.2.4 of RFC 2960
109 - Multi Homing support.
112 /* SCTP conntrack state transitions */
113 static const u8 sctp_conntracks
[2][9][SCTP_CONNTRACK_MAX
] = {
116 /* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA */
117 /* init */ {sCW
, sCW
, sCW
, sCE
, sES
, sSS
, sSR
, sSA
},
118 /* init_ack */ {sCL
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sSA
},
119 /* abort */ {sCL
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
},
120 /* shutdown */ {sCL
, sCL
, sCW
, sCE
, sSS
, sSS
, sSR
, sSA
},
121 /* shutdown_ack */ {sSA
, sCL
, sCW
, sCE
, sES
, sSA
, sSA
, sSA
},
122 /* error */ {sCL
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sSA
},/* Cant have Stale cookie*/
123 /* cookie_echo */ {sCL
, sCL
, sCE
, sCE
, sES
, sSS
, sSR
, sSA
},/* 5.2.4 - Big TODO */
124 /* cookie_ack */ {sCL
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sSA
},/* Cant come in orig dir */
125 /* shutdown_comp*/ {sCL
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sCL
}
129 /* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA */
130 /* init */ {sIV
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sSA
},/* INIT in sCL Big TODO */
131 /* init_ack */ {sIV
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sSA
},
132 /* abort */ {sIV
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
},
133 /* shutdown */ {sIV
, sCL
, sCW
, sCE
, sSR
, sSS
, sSR
, sSA
},
134 /* shutdown_ack */ {sIV
, sCL
, sCW
, sCE
, sES
, sSA
, sSA
, sSA
},
135 /* error */ {sIV
, sCL
, sCW
, sCL
, sES
, sSS
, sSR
, sSA
},
136 /* cookie_echo */ {sIV
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sSA
},/* Cant come in reply dir */
137 /* cookie_ack */ {sIV
, sCL
, sCW
, sES
, sES
, sSS
, sSR
, sSA
},
138 /* shutdown_comp*/ {sIV
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sCL
}
142 static int sctp_pkt_to_tuple(const struct sk_buff
*skb
,
143 unsigned int dataoff
,
144 struct nf_conntrack_tuple
*tuple
)
146 sctp_sctphdr_t _hdr
, *hp
;
148 /* Actually only need first 8 bytes. */
149 hp
= skb_header_pointer(skb
, dataoff
, 8, &_hdr
);
153 tuple
->src
.u
.sctp
.port
= hp
->source
;
154 tuple
->dst
.u
.sctp
.port
= hp
->dest
;
158 static int sctp_invert_tuple(struct nf_conntrack_tuple
*tuple
,
159 const struct nf_conntrack_tuple
*orig
)
161 tuple
->src
.u
.sctp
.port
= orig
->dst
.u
.sctp
.port
;
162 tuple
->dst
.u
.sctp
.port
= orig
->src
.u
.sctp
.port
;
166 /* Print out the per-protocol part of the tuple. */
167 static int sctp_print_tuple(struct seq_file
*s
,
168 const struct nf_conntrack_tuple
*tuple
)
170 return seq_printf(s
, "sport=%hu dport=%hu ",
171 ntohs(tuple
->src
.u
.sctp
.port
),
172 ntohs(tuple
->dst
.u
.sctp
.port
));
175 /* Print out the private part of the conntrack. */
176 static int sctp_print_conntrack(struct seq_file
*s
, const struct nf_conn
*ct
)
178 enum sctp_conntrack state
;
180 read_lock_bh(&sctp_lock
);
181 state
= ct
->proto
.sctp
.state
;
182 read_unlock_bh(&sctp_lock
);
184 return seq_printf(s
, "%s ", sctp_conntrack_names
[state
]);
187 #define for_each_sctp_chunk(skb, sch, _sch, offset, dataoff, count) \
188 for ((offset) = (dataoff) + sizeof(sctp_sctphdr_t), (count) = 0; \
189 (offset) < (skb)->len && \
190 ((sch) = skb_header_pointer((skb), (offset), sizeof(_sch), &(_sch))); \
191 (offset) += (ntohs((sch)->length) + 3) & ~3, (count)++)
193 /* Some validity checks to make sure the chunks are fine */
194 static int do_basic_checks(struct nf_conn
*ct
,
195 const struct sk_buff
*skb
,
196 unsigned int dataoff
,
199 u_int32_t offset
, count
;
200 sctp_chunkhdr_t _sch
, *sch
;
205 for_each_sctp_chunk (skb
, sch
, _sch
, offset
, dataoff
, count
) {
206 pr_debug("Chunk Num: %d Type: %d\n", count
, sch
->type
);
208 if (sch
->type
== SCTP_CID_INIT
||
209 sch
->type
== SCTP_CID_INIT_ACK
||
210 sch
->type
== SCTP_CID_SHUTDOWN_COMPLETE
)
214 * Cookie Ack/Echo chunks not the first OR
215 * Init / Init Ack / Shutdown compl chunks not the only chunks
218 if (((sch
->type
== SCTP_CID_COOKIE_ACK
||
219 sch
->type
== SCTP_CID_COOKIE_ECHO
||
221 count
!= 0) || !sch
->length
) {
222 pr_debug("Basic checks failed\n");
227 set_bit(sch
->type
, map
);
230 pr_debug("Basic checks passed\n");
234 static int new_state(enum ip_conntrack_dir dir
,
235 enum sctp_conntrack cur_state
,
240 pr_debug("Chunk type: %d\n", chunk_type
);
242 switch (chunk_type
) {
244 pr_debug("SCTP_CID_INIT\n");
247 case SCTP_CID_INIT_ACK
:
248 pr_debug("SCTP_CID_INIT_ACK\n");
252 pr_debug("SCTP_CID_ABORT\n");
255 case SCTP_CID_SHUTDOWN
:
256 pr_debug("SCTP_CID_SHUTDOWN\n");
259 case SCTP_CID_SHUTDOWN_ACK
:
260 pr_debug("SCTP_CID_SHUTDOWN_ACK\n");
264 pr_debug("SCTP_CID_ERROR\n");
267 case SCTP_CID_COOKIE_ECHO
:
268 pr_debug("SCTP_CID_COOKIE_ECHO\n");
271 case SCTP_CID_COOKIE_ACK
:
272 pr_debug("SCTP_CID_COOKIE_ACK\n");
275 case SCTP_CID_SHUTDOWN_COMPLETE
:
276 pr_debug("SCTP_CID_SHUTDOWN_COMPLETE\n");
280 /* Other chunks like DATA, SACK, HEARTBEAT and
281 its ACK do not cause a change in state */
282 pr_debug("Unknown chunk type, Will stay in %s\n",
283 sctp_conntrack_names
[cur_state
]);
287 pr_debug("dir: %d cur_state: %s chunk_type: %d new_state: %s\n",
288 dir
, sctp_conntrack_names
[cur_state
], chunk_type
,
289 sctp_conntrack_names
[sctp_conntracks
[dir
][i
][cur_state
]]);
291 return sctp_conntracks
[dir
][i
][cur_state
];
294 /* Returns verdict for packet, or -1 for invalid. */
295 static int sctp_packet(struct nf_conn
*ct
,
296 const struct sk_buff
*skb
,
297 unsigned int dataoff
,
298 enum ip_conntrack_info ctinfo
,
300 unsigned int hooknum
)
302 enum sctp_conntrack newconntrack
, oldsctpstate
;
303 enum ip_conntrack_dir dir
= CTINFO2DIR(ctinfo
);
304 sctp_sctphdr_t _sctph
, *sh
;
305 sctp_chunkhdr_t _sch
, *sch
;
306 u_int32_t offset
, count
;
307 unsigned long map
[256 / sizeof(unsigned long)] = { 0 };
309 sh
= skb_header_pointer(skb
, dataoff
, sizeof(_sctph
), &_sctph
);
313 if (do_basic_checks(ct
, skb
, dataoff
, map
) != 0)
316 /* Check the verification tag (Sec 8.5) */
317 if (!test_bit(SCTP_CID_INIT
, map
) &&
318 !test_bit(SCTP_CID_SHUTDOWN_COMPLETE
, map
) &&
319 !test_bit(SCTP_CID_COOKIE_ECHO
, map
) &&
320 !test_bit(SCTP_CID_ABORT
, map
) &&
321 !test_bit(SCTP_CID_SHUTDOWN_ACK
, map
) &&
322 sh
->vtag
!= ct
->proto
.sctp
.vtag
[dir
]) {
323 pr_debug("Verification tag check failed\n");
327 oldsctpstate
= newconntrack
= SCTP_CONNTRACK_MAX
;
328 for_each_sctp_chunk (skb
, sch
, _sch
, offset
, dataoff
, count
) {
329 write_lock_bh(&sctp_lock
);
331 /* Special cases of Verification tag check (Sec 8.5.1) */
332 if (sch
->type
== SCTP_CID_INIT
) {
335 write_unlock_bh(&sctp_lock
);
338 } else if (sch
->type
== SCTP_CID_ABORT
) {
340 if (sh
->vtag
!= ct
->proto
.sctp
.vtag
[dir
] &&
341 sh
->vtag
!= ct
->proto
.sctp
.vtag
[!dir
]) {
342 write_unlock_bh(&sctp_lock
);
345 } else if (sch
->type
== SCTP_CID_SHUTDOWN_COMPLETE
) {
347 if (sh
->vtag
!= ct
->proto
.sctp
.vtag
[dir
] &&
348 sh
->vtag
!= ct
->proto
.sctp
.vtag
[!dir
] &&
350 write_unlock_bh(&sctp_lock
);
353 } else if (sch
->type
== SCTP_CID_COOKIE_ECHO
) {
355 if (sh
->vtag
!= ct
->proto
.sctp
.vtag
[dir
]) {
356 write_unlock_bh(&sctp_lock
);
361 oldsctpstate
= ct
->proto
.sctp
.state
;
362 newconntrack
= new_state(dir
, oldsctpstate
, sch
->type
);
365 if (newconntrack
== SCTP_CONNTRACK_MAX
) {
366 pr_debug("nf_conntrack_sctp: Invalid dir=%i ctype=%u "
368 dir
, sch
->type
, oldsctpstate
);
369 write_unlock_bh(&sctp_lock
);
373 /* If it is an INIT or an INIT ACK note down the vtag */
374 if (sch
->type
== SCTP_CID_INIT
||
375 sch
->type
== SCTP_CID_INIT_ACK
) {
376 sctp_inithdr_t _inithdr
, *ih
;
378 ih
= skb_header_pointer(skb
, offset
+ sizeof(sctp_chunkhdr_t
),
379 sizeof(_inithdr
), &_inithdr
);
381 write_unlock_bh(&sctp_lock
);
384 pr_debug("Setting vtag %x for dir %d\n",
386 ct
->proto
.sctp
.vtag
[!dir
] = ih
->init_tag
;
389 ct
->proto
.sctp
.state
= newconntrack
;
390 if (oldsctpstate
!= newconntrack
)
391 nf_conntrack_event_cache(IPCT_PROTOINFO
, skb
);
392 write_unlock_bh(&sctp_lock
);
395 nf_ct_refresh_acct(ct
, ctinfo
, skb
, *sctp_timeouts
[newconntrack
]);
397 if (oldsctpstate
== SCTP_CONNTRACK_COOKIE_ECHOED
&&
398 dir
== IP_CT_DIR_REPLY
&&
399 newconntrack
== SCTP_CONNTRACK_ESTABLISHED
) {
400 pr_debug("Setting assured bit\n");
401 set_bit(IPS_ASSURED_BIT
, &ct
->status
);
402 nf_conntrack_event_cache(IPCT_STATUS
, skb
);
408 /* Called when a new connection for this protocol found. */
409 static int sctp_new(struct nf_conn
*ct
, const struct sk_buff
*skb
,
410 unsigned int dataoff
)
412 enum sctp_conntrack newconntrack
;
413 sctp_sctphdr_t _sctph
, *sh
;
414 sctp_chunkhdr_t _sch
, *sch
;
415 u_int32_t offset
, count
;
416 unsigned long map
[256 / sizeof(unsigned long)] = { 0 };
418 sh
= skb_header_pointer(skb
, dataoff
, sizeof(_sctph
), &_sctph
);
422 if (do_basic_checks(ct
, skb
, dataoff
, map
) != 0)
425 /* If an OOTB packet has any of these chunks discard (Sec 8.4) */
426 if (test_bit(SCTP_CID_ABORT
, map
) ||
427 test_bit(SCTP_CID_SHUTDOWN_COMPLETE
, map
) ||
428 test_bit(SCTP_CID_COOKIE_ACK
, map
))
431 newconntrack
= SCTP_CONNTRACK_MAX
;
432 for_each_sctp_chunk (skb
, sch
, _sch
, offset
, dataoff
, count
) {
433 /* Don't need lock here: this conntrack not in circulation yet */
434 newconntrack
= new_state(IP_CT_DIR_ORIGINAL
,
435 SCTP_CONNTRACK_NONE
, sch
->type
);
437 /* Invalid: delete conntrack */
438 if (newconntrack
== SCTP_CONNTRACK_NONE
||
439 newconntrack
== SCTP_CONNTRACK_MAX
) {
440 pr_debug("nf_conntrack_sctp: invalid new deleting.\n");
444 /* Copy the vtag into the state info */
445 if (sch
->type
== SCTP_CID_INIT
) {
447 sctp_inithdr_t _inithdr
, *ih
;
449 ih
= skb_header_pointer(skb
, offset
+ sizeof(sctp_chunkhdr_t
),
450 sizeof(_inithdr
), &_inithdr
);
454 pr_debug("Setting vtag %x for new conn\n",
457 ct
->proto
.sctp
.vtag
[IP_CT_DIR_REPLY
] =
464 /* If it is a shutdown ack OOTB packet, we expect a return
465 shutdown complete, otherwise an ABORT Sec 8.4 (5) and (8) */
467 pr_debug("Setting vtag %x for new conn OOTB\n",
469 ct
->proto
.sctp
.vtag
[IP_CT_DIR_REPLY
] = sh
->vtag
;
472 ct
->proto
.sctp
.state
= newconntrack
;
479 static unsigned int sctp_sysctl_table_users
;
480 static struct ctl_table_header
*sctp_sysctl_header
;
481 static struct ctl_table sctp_sysctl_table
[] = {
483 .procname
= "nf_conntrack_sctp_timeout_closed",
484 .data
= &nf_ct_sctp_timeout_closed
,
485 .maxlen
= sizeof(unsigned int),
487 .proc_handler
= &proc_dointvec_jiffies
,
490 .procname
= "nf_conntrack_sctp_timeout_cookie_wait",
491 .data
= &nf_ct_sctp_timeout_cookie_wait
,
492 .maxlen
= sizeof(unsigned int),
494 .proc_handler
= &proc_dointvec_jiffies
,
497 .procname
= "nf_conntrack_sctp_timeout_cookie_echoed",
498 .data
= &nf_ct_sctp_timeout_cookie_echoed
,
499 .maxlen
= sizeof(unsigned int),
501 .proc_handler
= &proc_dointvec_jiffies
,
504 .procname
= "nf_conntrack_sctp_timeout_established",
505 .data
= &nf_ct_sctp_timeout_established
,
506 .maxlen
= sizeof(unsigned int),
508 .proc_handler
= &proc_dointvec_jiffies
,
511 .procname
= "nf_conntrack_sctp_timeout_shutdown_sent",
512 .data
= &nf_ct_sctp_timeout_shutdown_sent
,
513 .maxlen
= sizeof(unsigned int),
515 .proc_handler
= &proc_dointvec_jiffies
,
518 .procname
= "nf_conntrack_sctp_timeout_shutdown_recd",
519 .data
= &nf_ct_sctp_timeout_shutdown_recd
,
520 .maxlen
= sizeof(unsigned int),
522 .proc_handler
= &proc_dointvec_jiffies
,
525 .procname
= "nf_conntrack_sctp_timeout_shutdown_ack_sent",
526 .data
= &nf_ct_sctp_timeout_shutdown_ack_sent
,
527 .maxlen
= sizeof(unsigned int),
529 .proc_handler
= &proc_dointvec_jiffies
,
536 #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
537 static struct ctl_table sctp_compat_sysctl_table
[] = {
539 .procname
= "ip_conntrack_sctp_timeout_closed",
540 .data
= &nf_ct_sctp_timeout_closed
,
541 .maxlen
= sizeof(unsigned int),
543 .proc_handler
= &proc_dointvec_jiffies
,
546 .procname
= "ip_conntrack_sctp_timeout_cookie_wait",
547 .data
= &nf_ct_sctp_timeout_cookie_wait
,
548 .maxlen
= sizeof(unsigned int),
550 .proc_handler
= &proc_dointvec_jiffies
,
553 .procname
= "ip_conntrack_sctp_timeout_cookie_echoed",
554 .data
= &nf_ct_sctp_timeout_cookie_echoed
,
555 .maxlen
= sizeof(unsigned int),
557 .proc_handler
= &proc_dointvec_jiffies
,
560 .procname
= "ip_conntrack_sctp_timeout_established",
561 .data
= &nf_ct_sctp_timeout_established
,
562 .maxlen
= sizeof(unsigned int),
564 .proc_handler
= &proc_dointvec_jiffies
,
567 .procname
= "ip_conntrack_sctp_timeout_shutdown_sent",
568 .data
= &nf_ct_sctp_timeout_shutdown_sent
,
569 .maxlen
= sizeof(unsigned int),
571 .proc_handler
= &proc_dointvec_jiffies
,
574 .procname
= "ip_conntrack_sctp_timeout_shutdown_recd",
575 .data
= &nf_ct_sctp_timeout_shutdown_recd
,
576 .maxlen
= sizeof(unsigned int),
578 .proc_handler
= &proc_dointvec_jiffies
,
581 .procname
= "ip_conntrack_sctp_timeout_shutdown_ack_sent",
582 .data
= &nf_ct_sctp_timeout_shutdown_ack_sent
,
583 .maxlen
= sizeof(unsigned int),
585 .proc_handler
= &proc_dointvec_jiffies
,
591 #endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
594 static struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp4 __read_mostly
= {
596 .l4proto
= IPPROTO_SCTP
,
598 .pkt_to_tuple
= sctp_pkt_to_tuple
,
599 .invert_tuple
= sctp_invert_tuple
,
600 .print_tuple
= sctp_print_tuple
,
601 .print_conntrack
= sctp_print_conntrack
,
602 .packet
= sctp_packet
,
605 #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
606 .tuple_to_nlattr
= nf_ct_port_tuple_to_nlattr
,
607 .nlattr_to_tuple
= nf_ct_port_nlattr_to_tuple
,
608 .nla_policy
= nf_ct_port_nla_policy
,
611 .ctl_table_users
= &sctp_sysctl_table_users
,
612 .ctl_table_header
= &sctp_sysctl_header
,
613 .ctl_table
= sctp_sysctl_table
,
614 #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
615 .ctl_compat_table
= sctp_compat_sysctl_table
,
620 static struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp6 __read_mostly
= {
622 .l4proto
= IPPROTO_SCTP
,
624 .pkt_to_tuple
= sctp_pkt_to_tuple
,
625 .invert_tuple
= sctp_invert_tuple
,
626 .print_tuple
= sctp_print_tuple
,
627 .print_conntrack
= sctp_print_conntrack
,
628 .packet
= sctp_packet
,
631 #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
632 .tuple_to_nlattr
= nf_ct_port_tuple_to_nlattr
,
633 .nlattr_to_tuple
= nf_ct_port_nlattr_to_tuple
,
634 .nla_policy
= nf_ct_port_nla_policy
,
637 .ctl_table_users
= &sctp_sysctl_table_users
,
638 .ctl_table_header
= &sctp_sysctl_header
,
639 .ctl_table
= sctp_sysctl_table
,
643 int __init
nf_conntrack_proto_sctp_init(void)
647 ret
= nf_conntrack_l4proto_register(&nf_conntrack_l4proto_sctp4
);
649 printk("nf_conntrack_l4proto_sctp4: protocol register failed\n");
652 ret
= nf_conntrack_l4proto_register(&nf_conntrack_l4proto_sctp6
);
654 printk("nf_conntrack_l4proto_sctp6: protocol register failed\n");
661 nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_sctp4
);
666 void __exit
nf_conntrack_proto_sctp_fini(void)
668 nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_sctp6
);
669 nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_sctp4
);
672 module_init(nf_conntrack_proto_sctp_init
);
673 module_exit(nf_conntrack_proto_sctp_fini
);
675 MODULE_LICENSE("GPL");
676 MODULE_AUTHOR("Kiran Kumar Immidi");
677 MODULE_DESCRIPTION("Netfilter connection tracking protocol helper for SCTP");
678 MODULE_ALIAS("ip_conntrack_proto_sctp");