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.
13 * Added support for proc manipulation of timeouts.
16 #include <linux/types.h>
17 #include <linux/sched.h>
18 #include <linux/timer.h>
19 #include <linux/interrupt.h>
20 #include <linux/netfilter.h>
21 #include <linux/module.h>
24 #include <linux/sctp.h>
25 #include <linux/string.h>
26 #include <linux/seq_file.h>
28 #include <linux/netfilter_ipv4/ip_conntrack.h>
29 #include <linux/netfilter_ipv4/ip_conntrack_protocol.h>
32 #define DEBUGP(format, ...) printk(format, ## __VA_ARGS__)
34 #define DEBUGP(format, args...)
37 /* Protects conntrack->proto.sctp */
38 static DEFINE_RWLOCK(sctp_lock
);
40 /* FIXME: Examine ipfilter's timeouts and conntrack transitions more
41 closely. They're more complex. --RR
43 And so for me for SCTP :D -Kiran */
45 static const char *sctp_conntrack_names
[] = {
57 #define MINS * 60 SECS
58 #define HOURS * 60 MINS
59 #define DAYS * 24 HOURS
61 static unsigned int ip_ct_sctp_timeout_closed
= 10 SECS
;
62 static unsigned int ip_ct_sctp_timeout_cookie_wait
= 3 SECS
;
63 static unsigned int ip_ct_sctp_timeout_cookie_echoed
= 3 SECS
;
64 static unsigned int ip_ct_sctp_timeout_established
= 5 DAYS
;
65 static unsigned int ip_ct_sctp_timeout_shutdown_sent
= 300 SECS
/ 1000;
66 static unsigned int ip_ct_sctp_timeout_shutdown_recd
= 300 SECS
/ 1000;
67 static unsigned int ip_ct_sctp_timeout_shutdown_ack_sent
= 3 SECS
;
69 static const unsigned int * sctp_timeouts
[]
70 = { NULL
, /* SCTP_CONNTRACK_NONE */
71 &ip_ct_sctp_timeout_closed
, /* SCTP_CONNTRACK_CLOSED */
72 &ip_ct_sctp_timeout_cookie_wait
, /* SCTP_CONNTRACK_COOKIE_WAIT */
73 &ip_ct_sctp_timeout_cookie_echoed
, /* SCTP_CONNTRACK_COOKIE_ECHOED */
74 &ip_ct_sctp_timeout_established
, /* SCTP_CONNTRACK_ESTABLISHED */
75 &ip_ct_sctp_timeout_shutdown_sent
, /* SCTP_CONNTRACK_SHUTDOWN_SENT */
76 &ip_ct_sctp_timeout_shutdown_recd
, /* SCTP_CONNTRACK_SHUTDOWN_RECD */
77 &ip_ct_sctp_timeout_shutdown_ack_sent
/* SCTP_CONNTRACK_SHUTDOWN_ACK_SENT */
80 #define sNO SCTP_CONNTRACK_NONE
81 #define sCL SCTP_CONNTRACK_CLOSED
82 #define sCW SCTP_CONNTRACK_COOKIE_WAIT
83 #define sCE SCTP_CONNTRACK_COOKIE_ECHOED
84 #define sES SCTP_CONNTRACK_ESTABLISHED
85 #define sSS SCTP_CONNTRACK_SHUTDOWN_SENT
86 #define sSR SCTP_CONNTRACK_SHUTDOWN_RECD
87 #define sSA SCTP_CONNTRACK_SHUTDOWN_ACK_SENT
88 #define sIV SCTP_CONNTRACK_MAX
91 These are the descriptions of the states:
93 NOTE: These state names are tantalizingly similar to the states of an
94 SCTP endpoint. But the interpretation of the states is a little different,
95 considering that these are the states of the connection and not of an end
96 point. Please note the subtleties. -Kiran
98 NONE - Nothing so far.
99 COOKIE WAIT - We have seen an INIT chunk in the original direction, or also
100 an INIT_ACK chunk in the reply direction.
101 COOKIE ECHOED - We have seen a COOKIE_ECHO chunk in the original direction.
102 ESTABLISHED - We have seen a COOKIE_ACK in the reply direction.
103 SHUTDOWN_SENT - We have seen a SHUTDOWN chunk in the original direction.
104 SHUTDOWN_RECD - We have seen a SHUTDOWN chunk in the reply directoin.
105 SHUTDOWN_ACK_SENT - We have seen a SHUTDOWN_ACK chunk in the direction opposite
106 to that of the SHUTDOWN chunk.
107 CLOSED - We have seen a SHUTDOWN_COMPLETE chunk in the direction of
108 the SHUTDOWN chunk. Connection is closed.
112 - I have assumed that the first INIT is in the original direction.
113 This messes things when an INIT comes in the reply direction in CLOSED
115 - Check the error type in the reply dir before transitioning from
116 cookie echoed to closed.
117 - Sec 5.2.4 of RFC 2960
118 - Multi Homing support.
121 /* SCTP conntrack state transitions */
122 static const enum sctp_conntrack sctp_conntracks
[2][9][SCTP_CONNTRACK_MAX
] = {
125 /* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA */
126 /* init */ {sCW
, sCW
, sCW
, sCE
, sES
, sSS
, sSR
, sSA
},
127 /* init_ack */ {sCL
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sSA
},
128 /* abort */ {sCL
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
},
129 /* shutdown */ {sCL
, sCL
, sCW
, sCE
, sSS
, sSS
, sSR
, sSA
},
130 /* shutdown_ack */ {sSA
, sCL
, sCW
, sCE
, sES
, sSA
, sSA
, sSA
},
131 /* error */ {sCL
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sSA
},/* Cant have Stale cookie*/
132 /* cookie_echo */ {sCL
, sCL
, sCE
, sCE
, sES
, sSS
, sSR
, sSA
},/* 5.2.4 - Big TODO */
133 /* cookie_ack */ {sCL
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sSA
},/* Cant come in orig dir */
134 /* shutdown_comp*/ {sCL
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sCL
}
138 /* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA */
139 /* init */ {sIV
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sSA
},/* INIT in sCL Big TODO */
140 /* init_ack */ {sIV
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sSA
},
141 /* abort */ {sIV
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
},
142 /* shutdown */ {sIV
, sCL
, sCW
, sCE
, sSR
, sSS
, sSR
, sSA
},
143 /* shutdown_ack */ {sIV
, sCL
, sCW
, sCE
, sES
, sSA
, sSA
, sSA
},
144 /* error */ {sIV
, sCL
, sCW
, sCL
, sES
, sSS
, sSR
, sSA
},
145 /* cookie_echo */ {sIV
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sSA
},/* Cant come in reply dir */
146 /* cookie_ack */ {sIV
, sCL
, sCW
, sES
, sES
, sSS
, sSR
, sSA
},
147 /* shutdown_comp*/ {sIV
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sCL
}
151 static int sctp_pkt_to_tuple(const struct sk_buff
*skb
,
152 unsigned int dataoff
,
153 struct ip_conntrack_tuple
*tuple
)
155 sctp_sctphdr_t _hdr
, *hp
;
157 DEBUGP(__FUNCTION__
);
160 /* Actually only need first 8 bytes. */
161 hp
= skb_header_pointer(skb
, dataoff
, 8, &_hdr
);
165 tuple
->src
.u
.sctp
.port
= hp
->source
;
166 tuple
->dst
.u
.sctp
.port
= hp
->dest
;
170 static int sctp_invert_tuple(struct ip_conntrack_tuple
*tuple
,
171 const struct ip_conntrack_tuple
*orig
)
173 DEBUGP(__FUNCTION__
);
176 tuple
->src
.u
.sctp
.port
= orig
->dst
.u
.sctp
.port
;
177 tuple
->dst
.u
.sctp
.port
= orig
->src
.u
.sctp
.port
;
181 /* Print out the per-protocol part of the tuple. */
182 static int sctp_print_tuple(struct seq_file
*s
,
183 const struct ip_conntrack_tuple
*tuple
)
185 DEBUGP(__FUNCTION__
);
188 return seq_printf(s
, "sport=%hu dport=%hu ",
189 ntohs(tuple
->src
.u
.sctp
.port
),
190 ntohs(tuple
->dst
.u
.sctp
.port
));
193 /* Print out the private part of the conntrack. */
194 static int sctp_print_conntrack(struct seq_file
*s
,
195 const struct ip_conntrack
*conntrack
)
197 enum sctp_conntrack state
;
199 DEBUGP(__FUNCTION__
);
202 read_lock_bh(&sctp_lock
);
203 state
= conntrack
->proto
.sctp
.state
;
204 read_unlock_bh(&sctp_lock
);
206 return seq_printf(s
, "%s ", sctp_conntrack_names
[state
]);
209 #define for_each_sctp_chunk(skb, sch, _sch, offset, count) \
210 for (offset = skb->nh.iph->ihl * 4 + sizeof(sctp_sctphdr_t), count = 0; \
211 offset < skb->len && \
212 (sch = skb_header_pointer(skb, offset, sizeof(_sch), &_sch)); \
213 offset += (htons(sch->length) + 3) & ~3, count++)
215 /* Some validity checks to make sure the chunks are fine */
216 static int do_basic_checks(struct ip_conntrack
*conntrack
,
217 const struct sk_buff
*skb
,
220 u_int32_t offset
, count
;
221 sctp_chunkhdr_t _sch
, *sch
;
224 DEBUGP(__FUNCTION__
);
229 for_each_sctp_chunk (skb
, sch
, _sch
, offset
, count
) {
230 DEBUGP("Chunk Num: %d Type: %d\n", count
, sch
->type
);
232 if (sch
->type
== SCTP_CID_INIT
233 || sch
->type
== SCTP_CID_INIT_ACK
234 || sch
->type
== SCTP_CID_SHUTDOWN_COMPLETE
) {
238 /* Cookie Ack/Echo chunks not the first OR
239 Init / Init Ack / Shutdown compl chunks not the only chunks */
240 if ((sch
->type
== SCTP_CID_COOKIE_ACK
241 || sch
->type
== SCTP_CID_COOKIE_ECHO
244 DEBUGP("Basic checks failed\n");
249 set_bit(sch
->type
, (void *)map
);
253 DEBUGP("Basic checks passed\n");
257 static int new_state(enum ip_conntrack_dir dir
,
258 enum sctp_conntrack cur_state
,
263 DEBUGP(__FUNCTION__
);
266 DEBUGP("Chunk type: %d\n", chunk_type
);
268 switch (chunk_type
) {
270 DEBUGP("SCTP_CID_INIT\n");
272 case SCTP_CID_INIT_ACK
:
273 DEBUGP("SCTP_CID_INIT_ACK\n");
276 DEBUGP("SCTP_CID_ABORT\n");
278 case SCTP_CID_SHUTDOWN
:
279 DEBUGP("SCTP_CID_SHUTDOWN\n");
281 case SCTP_CID_SHUTDOWN_ACK
:
282 DEBUGP("SCTP_CID_SHUTDOWN_ACK\n");
285 DEBUGP("SCTP_CID_ERROR\n");
287 case SCTP_CID_COOKIE_ECHO
:
288 DEBUGP("SCTP_CID_COOKIE_ECHO\n");
290 case SCTP_CID_COOKIE_ACK
:
291 DEBUGP("SCTP_CID_COOKIE_ACK\n");
293 case SCTP_CID_SHUTDOWN_COMPLETE
:
294 DEBUGP("SCTP_CID_SHUTDOWN_COMPLETE\n");
297 /* Other chunks like DATA, SACK, HEARTBEAT and
298 its ACK do not cause a change in state */
299 DEBUGP("Unknown chunk type, Will stay in %s\n",
300 sctp_conntrack_names
[cur_state
]);
304 DEBUGP("dir: %d cur_state: %s chunk_type: %d new_state: %s\n",
305 dir
, sctp_conntrack_names
[cur_state
], chunk_type
,
306 sctp_conntrack_names
[sctp_conntracks
[dir
][i
][cur_state
]]);
308 return sctp_conntracks
[dir
][i
][cur_state
];
311 /* Returns verdict for packet, or -1 for invalid. */
312 static int sctp_packet(struct ip_conntrack
*conntrack
,
313 const struct sk_buff
*skb
,
314 enum ip_conntrack_info ctinfo
)
316 enum sctp_conntrack newconntrack
, oldsctpstate
;
317 struct iphdr
*iph
= skb
->nh
.iph
;
318 sctp_sctphdr_t _sctph
, *sh
;
319 sctp_chunkhdr_t _sch
, *sch
;
320 u_int32_t offset
, count
;
321 char map
[256 / sizeof (char)] = {0};
323 DEBUGP(__FUNCTION__
);
326 sh
= skb_header_pointer(skb
, iph
->ihl
* 4, sizeof(_sctph
), &_sctph
);
330 if (do_basic_checks(conntrack
, skb
, map
) != 0)
333 /* Check the verification tag (Sec 8.5) */
334 if (!test_bit(SCTP_CID_INIT
, (void *)map
)
335 && !test_bit(SCTP_CID_SHUTDOWN_COMPLETE
, (void *)map
)
336 && !test_bit(SCTP_CID_COOKIE_ECHO
, (void *)map
)
337 && !test_bit(SCTP_CID_ABORT
, (void *)map
)
338 && !test_bit(SCTP_CID_SHUTDOWN_ACK
, (void *)map
)
339 && (sh
->vtag
!= conntrack
->proto
.sctp
.vtag
[CTINFO2DIR(ctinfo
)])) {
340 DEBUGP("Verification tag check failed\n");
344 oldsctpstate
= newconntrack
= SCTP_CONNTRACK_MAX
;
345 for_each_sctp_chunk (skb
, sch
, _sch
, offset
, count
) {
346 write_lock_bh(&sctp_lock
);
348 /* Special cases of Verification tag check (Sec 8.5.1) */
349 if (sch
->type
== SCTP_CID_INIT
) {
352 write_unlock_bh(&sctp_lock
);
355 } else if (sch
->type
== SCTP_CID_ABORT
) {
357 if (!(sh
->vtag
== conntrack
->proto
.sctp
.vtag
[CTINFO2DIR(ctinfo
)])
358 && !(sh
->vtag
== conntrack
->proto
.sctp
.vtag
359 [1 - CTINFO2DIR(ctinfo
)])) {
360 write_unlock_bh(&sctp_lock
);
363 } else if (sch
->type
== SCTP_CID_SHUTDOWN_COMPLETE
) {
365 if (!(sh
->vtag
== conntrack
->proto
.sctp
.vtag
[CTINFO2DIR(ctinfo
)])
366 && !(sh
->vtag
== conntrack
->proto
.sctp
.vtag
367 [1 - CTINFO2DIR(ctinfo
)]
368 && (sch
->flags
& 1))) {
369 write_unlock_bh(&sctp_lock
);
372 } else if (sch
->type
== SCTP_CID_COOKIE_ECHO
) {
374 if (!(sh
->vtag
== conntrack
->proto
.sctp
.vtag
[CTINFO2DIR(ctinfo
)])) {
375 write_unlock_bh(&sctp_lock
);
380 oldsctpstate
= conntrack
->proto
.sctp
.state
;
381 newconntrack
= new_state(CTINFO2DIR(ctinfo
), oldsctpstate
, sch
->type
);
384 if (newconntrack
== SCTP_CONNTRACK_MAX
) {
385 DEBUGP("ip_conntrack_sctp: Invalid dir=%i ctype=%u conntrack=%u\n",
386 CTINFO2DIR(ctinfo
), sch
->type
, oldsctpstate
);
387 write_unlock_bh(&sctp_lock
);
391 /* If it is an INIT or an INIT ACK note down the vtag */
392 if (sch
->type
== SCTP_CID_INIT
393 || sch
->type
== SCTP_CID_INIT_ACK
) {
394 sctp_inithdr_t _inithdr
, *ih
;
396 ih
= skb_header_pointer(skb
, offset
+ sizeof(sctp_chunkhdr_t
),
397 sizeof(_inithdr
), &_inithdr
);
399 write_unlock_bh(&sctp_lock
);
402 DEBUGP("Setting vtag %x for dir %d\n",
403 ih
->init_tag
, !CTINFO2DIR(ctinfo
));
404 conntrack
->proto
.sctp
.vtag
[!CTINFO2DIR(ctinfo
)] = ih
->init_tag
;
407 conntrack
->proto
.sctp
.state
= newconntrack
;
408 if (oldsctpstate
!= newconntrack
)
409 ip_conntrack_event_cache(IPCT_PROTOINFO
, skb
);
410 write_unlock_bh(&sctp_lock
);
413 ip_ct_refresh_acct(conntrack
, ctinfo
, skb
, *sctp_timeouts
[newconntrack
]);
415 if (oldsctpstate
== SCTP_CONNTRACK_COOKIE_ECHOED
416 && CTINFO2DIR(ctinfo
) == IP_CT_DIR_REPLY
417 && newconntrack
== SCTP_CONNTRACK_ESTABLISHED
) {
418 DEBUGP("Setting assured bit\n");
419 set_bit(IPS_ASSURED_BIT
, &conntrack
->status
);
420 ip_conntrack_event_cache(IPCT_STATUS
, skb
);
426 /* Called when a new connection for this protocol found. */
427 static int sctp_new(struct ip_conntrack
*conntrack
,
428 const struct sk_buff
*skb
)
430 enum sctp_conntrack newconntrack
;
431 struct iphdr
*iph
= skb
->nh
.iph
;
432 sctp_sctphdr_t _sctph
, *sh
;
433 sctp_chunkhdr_t _sch
, *sch
;
434 u_int32_t offset
, count
;
435 char map
[256 / sizeof (char)] = {0};
437 DEBUGP(__FUNCTION__
);
440 sh
= skb_header_pointer(skb
, iph
->ihl
* 4, sizeof(_sctph
), &_sctph
);
444 if (do_basic_checks(conntrack
, skb
, map
) != 0)
447 /* If an OOTB packet has any of these chunks discard (Sec 8.4) */
448 if ((test_bit (SCTP_CID_ABORT
, (void *)map
))
449 || (test_bit (SCTP_CID_SHUTDOWN_COMPLETE
, (void *)map
))
450 || (test_bit (SCTP_CID_COOKIE_ACK
, (void *)map
))) {
454 newconntrack
= SCTP_CONNTRACK_MAX
;
455 for_each_sctp_chunk (skb
, sch
, _sch
, offset
, count
) {
456 /* Don't need lock here: this conntrack not in circulation yet */
457 newconntrack
= new_state (IP_CT_DIR_ORIGINAL
,
458 SCTP_CONNTRACK_NONE
, sch
->type
);
460 /* Invalid: delete conntrack */
461 if (newconntrack
== SCTP_CONNTRACK_MAX
) {
462 DEBUGP("ip_conntrack_sctp: invalid new deleting.\n");
466 /* Copy the vtag into the state info */
467 if (sch
->type
== SCTP_CID_INIT
) {
469 sctp_inithdr_t _inithdr
, *ih
;
471 ih
= skb_header_pointer(skb
, offset
+ sizeof(sctp_chunkhdr_t
),
472 sizeof(_inithdr
), &_inithdr
);
476 DEBUGP("Setting vtag %x for new conn\n",
479 conntrack
->proto
.sctp
.vtag
[IP_CT_DIR_REPLY
] =
486 /* If it is a shutdown ack OOTB packet, we expect a return
487 shutdown complete, otherwise an ABORT Sec 8.4 (5) and (8) */
489 DEBUGP("Setting vtag %x for new conn OOTB\n",
491 conntrack
->proto
.sctp
.vtag
[IP_CT_DIR_REPLY
] = sh
->vtag
;
494 conntrack
->proto
.sctp
.state
= newconntrack
;
500 static struct ip_conntrack_protocol ip_conntrack_protocol_sctp
= {
501 .proto
= IPPROTO_SCTP
,
503 .pkt_to_tuple
= sctp_pkt_to_tuple
,
504 .invert_tuple
= sctp_invert_tuple
,
505 .print_tuple
= sctp_print_tuple
,
506 .print_conntrack
= sctp_print_conntrack
,
507 .packet
= sctp_packet
,
511 #if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \
512 defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE)
513 .tuple_to_nfattr
= ip_ct_port_tuple_to_nfattr
,
514 .nfattr_to_tuple
= ip_ct_port_nfattr_to_tuple
,
519 static ctl_table ip_ct_sysctl_table
[] = {
521 .ctl_name
= NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED
,
522 .procname
= "ip_conntrack_sctp_timeout_closed",
523 .data
= &ip_ct_sctp_timeout_closed
,
524 .maxlen
= sizeof(unsigned int),
526 .proc_handler
= &proc_dointvec_jiffies
,
529 .ctl_name
= NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT
,
530 .procname
= "ip_conntrack_sctp_timeout_cookie_wait",
531 .data
= &ip_ct_sctp_timeout_cookie_wait
,
532 .maxlen
= sizeof(unsigned int),
534 .proc_handler
= &proc_dointvec_jiffies
,
537 .ctl_name
= NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED
,
538 .procname
= "ip_conntrack_sctp_timeout_cookie_echoed",
539 .data
= &ip_ct_sctp_timeout_cookie_echoed
,
540 .maxlen
= sizeof(unsigned int),
542 .proc_handler
= &proc_dointvec_jiffies
,
545 .ctl_name
= NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED
,
546 .procname
= "ip_conntrack_sctp_timeout_established",
547 .data
= &ip_ct_sctp_timeout_established
,
548 .maxlen
= sizeof(unsigned int),
550 .proc_handler
= &proc_dointvec_jiffies
,
553 .ctl_name
= NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT
,
554 .procname
= "ip_conntrack_sctp_timeout_shutdown_sent",
555 .data
= &ip_ct_sctp_timeout_shutdown_sent
,
556 .maxlen
= sizeof(unsigned int),
558 .proc_handler
= &proc_dointvec_jiffies
,
561 .ctl_name
= NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD
,
562 .procname
= "ip_conntrack_sctp_timeout_shutdown_recd",
563 .data
= &ip_ct_sctp_timeout_shutdown_recd
,
564 .maxlen
= sizeof(unsigned int),
566 .proc_handler
= &proc_dointvec_jiffies
,
569 .ctl_name
= NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT
,
570 .procname
= "ip_conntrack_sctp_timeout_shutdown_ack_sent",
571 .data
= &ip_ct_sctp_timeout_shutdown_ack_sent
,
572 .maxlen
= sizeof(unsigned int),
574 .proc_handler
= &proc_dointvec_jiffies
,
579 static ctl_table ip_ct_netfilter_table
[] = {
581 .ctl_name
= NET_IPV4_NETFILTER
,
582 .procname
= "netfilter",
584 .child
= ip_ct_sysctl_table
,
589 static ctl_table ip_ct_ipv4_table
[] = {
591 .ctl_name
= NET_IPV4
,
594 .child
= ip_ct_netfilter_table
,
599 static ctl_table ip_ct_net_table
[] = {
604 .child
= ip_ct_ipv4_table
,
609 static struct ctl_table_header
*ip_ct_sysctl_header
;
612 static int __init
init(void)
616 ret
= ip_conntrack_protocol_register(&ip_conntrack_protocol_sctp
);
618 printk("ip_conntrack_proto_sctp: protocol register failed\n");
623 ip_ct_sysctl_header
= register_sysctl_table(ip_ct_net_table
, 0);
624 if (ip_ct_sysctl_header
== NULL
) {
626 printk("ip_conntrack_proto_sctp: can't register to sysctl.\n");
635 ip_conntrack_protocol_unregister(&ip_conntrack_protocol_sctp
);
638 DEBUGP("SCTP conntrack module loading %s\n",
639 ret
? "failed": "succeeded");
643 static void __exit
fini(void)
645 ip_conntrack_protocol_unregister(&ip_conntrack_protocol_sctp
);
647 unregister_sysctl_table(ip_ct_sysctl_header
);
649 DEBUGP("SCTP conntrack module unloaded\n");
655 MODULE_LICENSE("GPL");
656 MODULE_AUTHOR("Kiran Kumar Immidi");
657 MODULE_DESCRIPTION("Netfilter connection tracking protocol helper for SCTP");