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 ct->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 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
,
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
73 These are the descriptions of the states:
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
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.
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
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.
103 /* SCTP conntrack state transitions */
104 static const u8 sctp_conntracks
[2][9][SCTP_CONNTRACK_MAX
] = {
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
}
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
}
133 static int sctp_pkt_to_tuple(const struct sk_buff
*skb
,
134 unsigned int dataoff
,
135 struct nf_conntrack_tuple
*tuple
)
137 sctp_sctphdr_t _hdr
, *hp
;
139 /* Actually only need first 8 bytes. */
140 hp
= skb_header_pointer(skb
, dataoff
, 8, &_hdr
);
144 tuple
->src
.u
.sctp
.port
= hp
->source
;
145 tuple
->dst
.u
.sctp
.port
= hp
->dest
;
149 static int sctp_invert_tuple(struct nf_conntrack_tuple
*tuple
,
150 const struct nf_conntrack_tuple
*orig
)
152 tuple
->src
.u
.sctp
.port
= orig
->dst
.u
.sctp
.port
;
153 tuple
->dst
.u
.sctp
.port
= orig
->src
.u
.sctp
.port
;
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
)
161 return seq_printf(s
, "sport=%hu dport=%hu ",
162 ntohs(tuple
->src
.u
.sctp
.port
),
163 ntohs(tuple
->dst
.u
.sctp
.port
));
166 /* Print out the private part of the conntrack. */
167 static int sctp_print_conntrack(struct seq_file
*s
, const struct nf_conn
*ct
)
169 enum sctp_conntrack state
;
171 read_lock_bh(&sctp_lock
);
172 state
= ct
->proto
.sctp
.state
;
173 read_unlock_bh(&sctp_lock
);
175 return seq_printf(s
, "%s ", sctp_conntrack_names
[state
]);
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)++)
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
,
190 u_int32_t offset
, count
;
191 sctp_chunkhdr_t _sch
, *sch
;
196 for_each_sctp_chunk (skb
, sch
, _sch
, offset
, dataoff
, count
) {
197 pr_debug("Chunk Num: %d Type: %d\n", count
, sch
->type
);
199 if (sch
->type
== SCTP_CID_INIT
||
200 sch
->type
== SCTP_CID_INIT_ACK
||
201 sch
->type
== SCTP_CID_SHUTDOWN_COMPLETE
)
205 * Cookie Ack/Echo chunks not the first OR
206 * Init / Init Ack / Shutdown compl chunks not the only chunks
209 if (((sch
->type
== SCTP_CID_COOKIE_ACK
||
210 sch
->type
== SCTP_CID_COOKIE_ECHO
||
212 count
!= 0) || !sch
->length
) {
213 pr_debug("Basic checks failed\n");
218 set_bit(sch
->type
, map
);
221 pr_debug("Basic checks passed\n");
225 static int sctp_new_state(enum ip_conntrack_dir dir
,
226 enum sctp_conntrack cur_state
,
231 pr_debug("Chunk type: %d\n", chunk_type
);
233 switch (chunk_type
) {
235 pr_debug("SCTP_CID_INIT\n");
238 case SCTP_CID_INIT_ACK
:
239 pr_debug("SCTP_CID_INIT_ACK\n");
243 pr_debug("SCTP_CID_ABORT\n");
246 case SCTP_CID_SHUTDOWN
:
247 pr_debug("SCTP_CID_SHUTDOWN\n");
250 case SCTP_CID_SHUTDOWN_ACK
:
251 pr_debug("SCTP_CID_SHUTDOWN_ACK\n");
255 pr_debug("SCTP_CID_ERROR\n");
258 case SCTP_CID_COOKIE_ECHO
:
259 pr_debug("SCTP_CID_COOKIE_ECHO\n");
262 case SCTP_CID_COOKIE_ACK
:
263 pr_debug("SCTP_CID_COOKIE_ACK\n");
266 case SCTP_CID_SHUTDOWN_COMPLETE
:
267 pr_debug("SCTP_CID_SHUTDOWN_COMPLETE\n");
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
]);
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
]]);
282 return sctp_conntracks
[dir
][i
][cur_state
];
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
,
291 unsigned int hooknum
)
293 enum sctp_conntrack new_state
, old_state
;
294 enum ip_conntrack_dir dir
= CTINFO2DIR(ctinfo
);
295 sctp_sctphdr_t _sctph
, *sh
;
296 sctp_chunkhdr_t _sch
, *sch
;
297 u_int32_t offset
, count
;
298 unsigned long map
[256 / sizeof(unsigned long)] = { 0 };
300 sh
= skb_header_pointer(skb
, dataoff
, sizeof(_sctph
), &_sctph
);
304 if (do_basic_checks(ct
, skb
, dataoff
, map
) != 0)
307 /* Check the verification tag (Sec 8.5) */
308 if (!test_bit(SCTP_CID_INIT
, map
) &&
309 !test_bit(SCTP_CID_SHUTDOWN_COMPLETE
, map
) &&
310 !test_bit(SCTP_CID_COOKIE_ECHO
, map
) &&
311 !test_bit(SCTP_CID_ABORT
, map
) &&
312 !test_bit(SCTP_CID_SHUTDOWN_ACK
, map
) &&
313 sh
->vtag
!= ct
->proto
.sctp
.vtag
[dir
]) {
314 pr_debug("Verification tag check failed\n");
318 old_state
= new_state
= SCTP_CONNTRACK_MAX
;
319 write_lock_bh(&sctp_lock
);
320 for_each_sctp_chunk (skb
, sch
, _sch
, offset
, dataoff
, count
) {
321 /* Special cases of Verification tag check (Sec 8.5.1) */
322 if (sch
->type
== SCTP_CID_INIT
) {
326 } else if (sch
->type
== SCTP_CID_ABORT
) {
328 if (sh
->vtag
!= ct
->proto
.sctp
.vtag
[dir
] &&
329 sh
->vtag
!= ct
->proto
.sctp
.vtag
[!dir
])
331 } else if (sch
->type
== SCTP_CID_SHUTDOWN_COMPLETE
) {
333 if (sh
->vtag
!= ct
->proto
.sctp
.vtag
[dir
] &&
334 sh
->vtag
!= ct
->proto
.sctp
.vtag
[!dir
] &&
335 sch
->flags
& SCTP_CHUNK_FLAG_T
)
337 } else if (sch
->type
== SCTP_CID_COOKIE_ECHO
) {
339 if (sh
->vtag
!= ct
->proto
.sctp
.vtag
[dir
])
343 old_state
= ct
->proto
.sctp
.state
;
344 new_state
= sctp_new_state(dir
, old_state
, sch
->type
);
347 if (new_state
== SCTP_CONNTRACK_MAX
) {
348 pr_debug("nf_conntrack_sctp: Invalid dir=%i ctype=%u "
350 dir
, sch
->type
, old_state
);
354 /* If it is an INIT or an INIT ACK note down the vtag */
355 if (sch
->type
== SCTP_CID_INIT
||
356 sch
->type
== SCTP_CID_INIT_ACK
) {
357 sctp_inithdr_t _inithdr
, *ih
;
359 ih
= skb_header_pointer(skb
, offset
+ sizeof(sctp_chunkhdr_t
),
360 sizeof(_inithdr
), &_inithdr
);
363 pr_debug("Setting vtag %x for dir %d\n",
365 ct
->proto
.sctp
.vtag
[!dir
] = ih
->init_tag
;
368 ct
->proto
.sctp
.state
= new_state
;
369 if (old_state
!= new_state
)
370 nf_conntrack_event_cache(IPCT_PROTOINFO
, skb
);
372 write_unlock_bh(&sctp_lock
);
374 nf_ct_refresh_acct(ct
, ctinfo
, skb
, sctp_timeouts
[new_state
]);
376 if (old_state
== SCTP_CONNTRACK_COOKIE_ECHOED
&&
377 dir
== IP_CT_DIR_REPLY
&&
378 new_state
== SCTP_CONNTRACK_ESTABLISHED
) {
379 pr_debug("Setting assured bit\n");
380 set_bit(IPS_ASSURED_BIT
, &ct
->status
);
381 nf_conntrack_event_cache(IPCT_STATUS
, skb
);
387 write_unlock_bh(&sctp_lock
);
392 /* Called when a new connection for this protocol found. */
393 static int sctp_new(struct nf_conn
*ct
, const struct sk_buff
*skb
,
394 unsigned int dataoff
)
396 enum sctp_conntrack new_state
;
397 sctp_sctphdr_t _sctph
, *sh
;
398 sctp_chunkhdr_t _sch
, *sch
;
399 u_int32_t offset
, count
;
400 unsigned long map
[256 / sizeof(unsigned long)] = { 0 };
402 sh
= skb_header_pointer(skb
, dataoff
, sizeof(_sctph
), &_sctph
);
406 if (do_basic_checks(ct
, skb
, dataoff
, map
) != 0)
409 /* If an OOTB packet has any of these chunks discard (Sec 8.4) */
410 if (test_bit(SCTP_CID_ABORT
, map
) ||
411 test_bit(SCTP_CID_SHUTDOWN_COMPLETE
, map
) ||
412 test_bit(SCTP_CID_COOKIE_ACK
, map
))
415 new_state
= SCTP_CONNTRACK_MAX
;
416 for_each_sctp_chunk (skb
, sch
, _sch
, offset
, dataoff
, count
) {
417 /* Don't need lock here: this conntrack not in circulation yet */
418 new_state
= sctp_new_state(IP_CT_DIR_ORIGINAL
,
419 SCTP_CONNTRACK_NONE
, sch
->type
);
421 /* Invalid: delete conntrack */
422 if (new_state
== SCTP_CONNTRACK_NONE
||
423 new_state
== SCTP_CONNTRACK_MAX
) {
424 pr_debug("nf_conntrack_sctp: invalid new deleting.\n");
428 /* Copy the vtag into the state info */
429 if (sch
->type
== SCTP_CID_INIT
) {
431 sctp_inithdr_t _inithdr
, *ih
;
433 ih
= skb_header_pointer(skb
, offset
+ sizeof(sctp_chunkhdr_t
),
434 sizeof(_inithdr
), &_inithdr
);
438 pr_debug("Setting vtag %x for new conn\n",
441 ct
->proto
.sctp
.vtag
[IP_CT_DIR_REPLY
] =
448 /* If it is a shutdown ack OOTB packet, we expect a return
449 shutdown complete, otherwise an ABORT Sec 8.4 (5) and (8) */
451 pr_debug("Setting vtag %x for new conn OOTB\n",
453 ct
->proto
.sctp
.vtag
[IP_CT_DIR_REPLY
] = sh
->vtag
;
456 ct
->proto
.sctp
.state
= new_state
;
463 static unsigned int sctp_sysctl_table_users
;
464 static struct ctl_table_header
*sctp_sysctl_header
;
465 static struct ctl_table sctp_sysctl_table
[] = {
467 .procname
= "nf_conntrack_sctp_timeout_closed",
468 .data
= &sctp_timeouts
[SCTP_CONNTRACK_CLOSED
],
469 .maxlen
= sizeof(unsigned int),
471 .proc_handler
= &proc_dointvec_jiffies
,
474 .procname
= "nf_conntrack_sctp_timeout_cookie_wait",
475 .data
= &sctp_timeouts
[SCTP_CONNTRACK_COOKIE_WAIT
],
476 .maxlen
= sizeof(unsigned int),
478 .proc_handler
= &proc_dointvec_jiffies
,
481 .procname
= "nf_conntrack_sctp_timeout_cookie_echoed",
482 .data
= &sctp_timeouts
[SCTP_CONNTRACK_COOKIE_ECHOED
],
483 .maxlen
= sizeof(unsigned int),
485 .proc_handler
= &proc_dointvec_jiffies
,
488 .procname
= "nf_conntrack_sctp_timeout_established",
489 .data
= &sctp_timeouts
[SCTP_CONNTRACK_ESTABLISHED
],
490 .maxlen
= sizeof(unsigned int),
492 .proc_handler
= &proc_dointvec_jiffies
,
495 .procname
= "nf_conntrack_sctp_timeout_shutdown_sent",
496 .data
= &sctp_timeouts
[SCTP_CONNTRACK_SHUTDOWN_SENT
],
497 .maxlen
= sizeof(unsigned int),
499 .proc_handler
= &proc_dointvec_jiffies
,
502 .procname
= "nf_conntrack_sctp_timeout_shutdown_recd",
503 .data
= &sctp_timeouts
[SCTP_CONNTRACK_SHUTDOWN_RECD
],
504 .maxlen
= sizeof(unsigned int),
506 .proc_handler
= &proc_dointvec_jiffies
,
509 .procname
= "nf_conntrack_sctp_timeout_shutdown_ack_sent",
510 .data
= &sctp_timeouts
[SCTP_CONNTRACK_SHUTDOWN_ACK_SENT
],
511 .maxlen
= sizeof(unsigned int),
513 .proc_handler
= &proc_dointvec_jiffies
,
520 #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
521 static struct ctl_table sctp_compat_sysctl_table
[] = {
523 .procname
= "ip_conntrack_sctp_timeout_closed",
524 .data
= &sctp_timeouts
[SCTP_CONNTRACK_CLOSED
],
525 .maxlen
= sizeof(unsigned int),
527 .proc_handler
= &proc_dointvec_jiffies
,
530 .procname
= "ip_conntrack_sctp_timeout_cookie_wait",
531 .data
= &sctp_timeouts
[SCTP_CONNTRACK_COOKIE_WAIT
],
532 .maxlen
= sizeof(unsigned int),
534 .proc_handler
= &proc_dointvec_jiffies
,
537 .procname
= "ip_conntrack_sctp_timeout_cookie_echoed",
538 .data
= &sctp_timeouts
[SCTP_CONNTRACK_COOKIE_ECHOED
],
539 .maxlen
= sizeof(unsigned int),
541 .proc_handler
= &proc_dointvec_jiffies
,
544 .procname
= "ip_conntrack_sctp_timeout_established",
545 .data
= &sctp_timeouts
[SCTP_CONNTRACK_ESTABLISHED
],
546 .maxlen
= sizeof(unsigned int),
548 .proc_handler
= &proc_dointvec_jiffies
,
551 .procname
= "ip_conntrack_sctp_timeout_shutdown_sent",
552 .data
= &sctp_timeouts
[SCTP_CONNTRACK_SHUTDOWN_SENT
],
553 .maxlen
= sizeof(unsigned int),
555 .proc_handler
= &proc_dointvec_jiffies
,
558 .procname
= "ip_conntrack_sctp_timeout_shutdown_recd",
559 .data
= &sctp_timeouts
[SCTP_CONNTRACK_SHUTDOWN_RECD
],
560 .maxlen
= sizeof(unsigned int),
562 .proc_handler
= &proc_dointvec_jiffies
,
565 .procname
= "ip_conntrack_sctp_timeout_shutdown_ack_sent",
566 .data
= &sctp_timeouts
[SCTP_CONNTRACK_SHUTDOWN_ACK_SENT
],
567 .maxlen
= sizeof(unsigned int),
569 .proc_handler
= &proc_dointvec_jiffies
,
575 #endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
578 static struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp4 __read_mostly
= {
580 .l4proto
= IPPROTO_SCTP
,
582 .pkt_to_tuple
= sctp_pkt_to_tuple
,
583 .invert_tuple
= sctp_invert_tuple
,
584 .print_tuple
= sctp_print_tuple
,
585 .print_conntrack
= sctp_print_conntrack
,
586 .packet
= sctp_packet
,
589 #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
590 .tuple_to_nlattr
= nf_ct_port_tuple_to_nlattr
,
591 .nlattr_to_tuple
= nf_ct_port_nlattr_to_tuple
,
592 .nla_policy
= nf_ct_port_nla_policy
,
595 .ctl_table_users
= &sctp_sysctl_table_users
,
596 .ctl_table_header
= &sctp_sysctl_header
,
597 .ctl_table
= sctp_sysctl_table
,
598 #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
599 .ctl_compat_table
= sctp_compat_sysctl_table
,
604 static struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp6 __read_mostly
= {
606 .l4proto
= IPPROTO_SCTP
,
608 .pkt_to_tuple
= sctp_pkt_to_tuple
,
609 .invert_tuple
= sctp_invert_tuple
,
610 .print_tuple
= sctp_print_tuple
,
611 .print_conntrack
= sctp_print_conntrack
,
612 .packet
= sctp_packet
,
615 #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
616 .tuple_to_nlattr
= nf_ct_port_tuple_to_nlattr
,
617 .nlattr_to_tuple
= nf_ct_port_nlattr_to_tuple
,
618 .nla_policy
= nf_ct_port_nla_policy
,
621 .ctl_table_users
= &sctp_sysctl_table_users
,
622 .ctl_table_header
= &sctp_sysctl_header
,
623 .ctl_table
= sctp_sysctl_table
,
627 static int __init
nf_conntrack_proto_sctp_init(void)
631 ret
= nf_conntrack_l4proto_register(&nf_conntrack_l4proto_sctp4
);
633 printk("nf_conntrack_l4proto_sctp4: protocol register failed\n");
636 ret
= nf_conntrack_l4proto_register(&nf_conntrack_l4proto_sctp6
);
638 printk("nf_conntrack_l4proto_sctp6: protocol register failed\n");
645 nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_sctp4
);
650 static void __exit
nf_conntrack_proto_sctp_fini(void)
652 nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_sctp6
);
653 nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_sctp4
);
656 module_init(nf_conntrack_proto_sctp_init
);
657 module_exit(nf_conntrack_proto_sctp_fini
);
659 MODULE_LICENSE("GPL");
660 MODULE_AUTHOR("Kiran Kumar Immidi");
661 MODULE_DESCRIPTION("Netfilter connection tracking protocol helper for SCTP");
662 MODULE_ALIAS("ip_conntrack_proto_sctp");