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 /* FIXME: Examine ipfilter's timeouts and conntrack transitions more
29 closely. They're more complex. --RR
31 And so for me for SCTP :D -Kiran */
33 static const char *const sctp_conntrack_names
[] = {
45 #define MINS * 60 SECS
46 #define HOURS * 60 MINS
47 #define DAYS * 24 HOURS
49 static unsigned int sctp_timeouts
[SCTP_CONNTRACK_MAX
] __read_mostly
= {
50 [SCTP_CONNTRACK_CLOSED
] = 10 SECS
,
51 [SCTP_CONNTRACK_COOKIE_WAIT
] = 3 SECS
,
52 [SCTP_CONNTRACK_COOKIE_ECHOED
] = 3 SECS
,
53 [SCTP_CONNTRACK_ESTABLISHED
] = 5 DAYS
,
54 [SCTP_CONNTRACK_SHUTDOWN_SENT
] = 300 SECS
/ 1000,
55 [SCTP_CONNTRACK_SHUTDOWN_RECD
] = 300 SECS
/ 1000,
56 [SCTP_CONNTRACK_SHUTDOWN_ACK_SENT
] = 3 SECS
,
59 #define sNO SCTP_CONNTRACK_NONE
60 #define sCL SCTP_CONNTRACK_CLOSED
61 #define sCW SCTP_CONNTRACK_COOKIE_WAIT
62 #define sCE SCTP_CONNTRACK_COOKIE_ECHOED
63 #define sES SCTP_CONNTRACK_ESTABLISHED
64 #define sSS SCTP_CONNTRACK_SHUTDOWN_SENT
65 #define sSR SCTP_CONNTRACK_SHUTDOWN_RECD
66 #define sSA SCTP_CONNTRACK_SHUTDOWN_ACK_SENT
67 #define sIV SCTP_CONNTRACK_MAX
70 These are the descriptions of the states:
72 NOTE: These state names are tantalizingly similar to the states of an
73 SCTP endpoint. But the interpretation of the states is a little different,
74 considering that these are the states of the connection and not of an end
75 point. Please note the subtleties. -Kiran
77 NONE - Nothing so far.
78 COOKIE WAIT - We have seen an INIT chunk in the original direction, or also
79 an INIT_ACK chunk in the reply direction.
80 COOKIE ECHOED - We have seen a COOKIE_ECHO chunk in the original direction.
81 ESTABLISHED - We have seen a COOKIE_ACK in the reply direction.
82 SHUTDOWN_SENT - We have seen a SHUTDOWN chunk in the original direction.
83 SHUTDOWN_RECD - We have seen a SHUTDOWN chunk in the reply directoin.
84 SHUTDOWN_ACK_SENT - We have seen a SHUTDOWN_ACK chunk in the direction opposite
85 to that of the SHUTDOWN chunk.
86 CLOSED - We have seen a SHUTDOWN_COMPLETE chunk in the direction of
87 the SHUTDOWN chunk. Connection is closed.
91 - I have assumed that the first INIT is in the original direction.
92 This messes things when an INIT comes in the reply direction in CLOSED
94 - Check the error type in the reply dir before transitioning from
95 cookie echoed to closed.
96 - Sec 5.2.4 of RFC 2960
97 - Multi Homing support.
100 /* SCTP conntrack state transitions */
101 static const u8 sctp_conntracks
[2][9][SCTP_CONNTRACK_MAX
] = {
104 /* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA */
105 /* init */ {sCW
, sCW
, sCW
, sCE
, sES
, sSS
, sSR
, sSA
},
106 /* init_ack */ {sCL
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sSA
},
107 /* abort */ {sCL
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
},
108 /* shutdown */ {sCL
, sCL
, sCW
, sCE
, sSS
, sSS
, sSR
, sSA
},
109 /* shutdown_ack */ {sSA
, sCL
, sCW
, sCE
, sES
, sSA
, sSA
, sSA
},
110 /* error */ {sCL
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sSA
},/* Can't have Stale cookie*/
111 /* cookie_echo */ {sCL
, sCL
, sCE
, sCE
, sES
, sSS
, sSR
, sSA
},/* 5.2.4 - Big TODO */
112 /* cookie_ack */ {sCL
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sSA
},/* Can't come in orig dir */
113 /* shutdown_comp*/ {sCL
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sCL
}
117 /* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA */
118 /* init */ {sIV
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sSA
},/* INIT in sCL Big TODO */
119 /* init_ack */ {sIV
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sSA
},
120 /* abort */ {sIV
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
},
121 /* shutdown */ {sIV
, sCL
, sCW
, sCE
, sSR
, sSS
, sSR
, sSA
},
122 /* shutdown_ack */ {sIV
, sCL
, sCW
, sCE
, sES
, sSA
, sSA
, sSA
},
123 /* error */ {sIV
, sCL
, sCW
, sCL
, sES
, sSS
, sSR
, sSA
},
124 /* cookie_echo */ {sIV
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sSA
},/* Can't come in reply dir */
125 /* cookie_ack */ {sIV
, sCL
, sCW
, sES
, sES
, sSS
, sSR
, sSA
},
126 /* shutdown_comp*/ {sIV
, sCL
, sCW
, sCE
, sES
, sSS
, sSR
, sCL
}
130 static bool sctp_pkt_to_tuple(const struct sk_buff
*skb
, unsigned int dataoff
,
131 struct nf_conntrack_tuple
*tuple
)
133 const struct sctphdr
*hp
;
136 /* Actually only need first 8 bytes. */
137 hp
= skb_header_pointer(skb
, dataoff
, 8, &_hdr
);
141 tuple
->src
.u
.sctp
.port
= hp
->source
;
142 tuple
->dst
.u
.sctp
.port
= hp
->dest
;
146 static bool sctp_invert_tuple(struct nf_conntrack_tuple
*tuple
,
147 const struct nf_conntrack_tuple
*orig
)
149 tuple
->src
.u
.sctp
.port
= orig
->dst
.u
.sctp
.port
;
150 tuple
->dst
.u
.sctp
.port
= orig
->src
.u
.sctp
.port
;
154 /* Print out the per-protocol part of the tuple. */
155 static int sctp_print_tuple(struct seq_file
*s
,
156 const struct nf_conntrack_tuple
*tuple
)
158 return seq_printf(s
, "sport=%hu dport=%hu ",
159 ntohs(tuple
->src
.u
.sctp
.port
),
160 ntohs(tuple
->dst
.u
.sctp
.port
));
163 /* Print out the private part of the conntrack. */
164 static int sctp_print_conntrack(struct seq_file
*s
, struct nf_conn
*ct
)
166 enum sctp_conntrack state
;
168 spin_lock_bh(&ct
->lock
);
169 state
= ct
->proto
.sctp
.state
;
170 spin_unlock_bh(&ct
->lock
);
172 return seq_printf(s
, "%s ", sctp_conntrack_names
[state
]);
175 #define for_each_sctp_chunk(skb, sch, _sch, offset, dataoff, count) \
176 for ((offset) = (dataoff) + sizeof(sctp_sctphdr_t), (count) = 0; \
177 (offset) < (skb)->len && \
178 ((sch) = skb_header_pointer((skb), (offset), sizeof(_sch), &(_sch))); \
179 (offset) += (ntohs((sch)->length) + 3) & ~3, (count)++)
181 /* Some validity checks to make sure the chunks are fine */
182 static int do_basic_checks(struct nf_conn
*ct
,
183 const struct sk_buff
*skb
,
184 unsigned int dataoff
,
187 u_int32_t offset
, count
;
188 sctp_chunkhdr_t _sch
, *sch
;
193 for_each_sctp_chunk (skb
, sch
, _sch
, offset
, dataoff
, count
) {
194 pr_debug("Chunk Num: %d Type: %d\n", count
, sch
->type
);
196 if (sch
->type
== SCTP_CID_INIT
||
197 sch
->type
== SCTP_CID_INIT_ACK
||
198 sch
->type
== SCTP_CID_SHUTDOWN_COMPLETE
)
202 * Cookie Ack/Echo chunks not the first OR
203 * Init / Init Ack / Shutdown compl chunks not the only chunks
206 if (((sch
->type
== SCTP_CID_COOKIE_ACK
||
207 sch
->type
== SCTP_CID_COOKIE_ECHO
||
209 count
!= 0) || !sch
->length
) {
210 pr_debug("Basic checks failed\n");
215 set_bit(sch
->type
, map
);
218 pr_debug("Basic checks passed\n");
222 static int sctp_new_state(enum ip_conntrack_dir dir
,
223 enum sctp_conntrack cur_state
,
228 pr_debug("Chunk type: %d\n", chunk_type
);
230 switch (chunk_type
) {
232 pr_debug("SCTP_CID_INIT\n");
235 case SCTP_CID_INIT_ACK
:
236 pr_debug("SCTP_CID_INIT_ACK\n");
240 pr_debug("SCTP_CID_ABORT\n");
243 case SCTP_CID_SHUTDOWN
:
244 pr_debug("SCTP_CID_SHUTDOWN\n");
247 case SCTP_CID_SHUTDOWN_ACK
:
248 pr_debug("SCTP_CID_SHUTDOWN_ACK\n");
252 pr_debug("SCTP_CID_ERROR\n");
255 case SCTP_CID_COOKIE_ECHO
:
256 pr_debug("SCTP_CID_COOKIE_ECHO\n");
259 case SCTP_CID_COOKIE_ACK
:
260 pr_debug("SCTP_CID_COOKIE_ACK\n");
263 case SCTP_CID_SHUTDOWN_COMPLETE
:
264 pr_debug("SCTP_CID_SHUTDOWN_COMPLETE\n");
268 /* Other chunks like DATA, SACK, HEARTBEAT and
269 its ACK do not cause a change in state */
270 pr_debug("Unknown chunk type, Will stay in %s\n",
271 sctp_conntrack_names
[cur_state
]);
275 pr_debug("dir: %d cur_state: %s chunk_type: %d new_state: %s\n",
276 dir
, sctp_conntrack_names
[cur_state
], chunk_type
,
277 sctp_conntrack_names
[sctp_conntracks
[dir
][i
][cur_state
]]);
279 return sctp_conntracks
[dir
][i
][cur_state
];
282 static unsigned int *sctp_get_timeouts(struct net
*net
)
284 return sctp_timeouts
;
287 /* Returns verdict for packet, or -NF_ACCEPT for invalid. */
288 static int sctp_packet(struct nf_conn
*ct
,
289 const struct sk_buff
*skb
,
290 unsigned int dataoff
,
291 enum ip_conntrack_info ctinfo
,
293 unsigned int hooknum
,
294 unsigned int *timeouts
)
296 enum sctp_conntrack new_state
, old_state
;
297 enum ip_conntrack_dir dir
= CTINFO2DIR(ctinfo
);
298 const struct sctphdr
*sh
;
299 struct sctphdr _sctph
;
300 const struct sctp_chunkhdr
*sch
;
301 struct sctp_chunkhdr _sch
;
302 u_int32_t offset
, count
;
303 unsigned long map
[256 / sizeof(unsigned long)] = { 0 };
305 sh
= skb_header_pointer(skb
, dataoff
, sizeof(_sctph
), &_sctph
);
309 if (do_basic_checks(ct
, skb
, dataoff
, map
) != 0)
312 /* Check the verification tag (Sec 8.5) */
313 if (!test_bit(SCTP_CID_INIT
, map
) &&
314 !test_bit(SCTP_CID_SHUTDOWN_COMPLETE
, map
) &&
315 !test_bit(SCTP_CID_COOKIE_ECHO
, map
) &&
316 !test_bit(SCTP_CID_ABORT
, map
) &&
317 !test_bit(SCTP_CID_SHUTDOWN_ACK
, map
) &&
318 sh
->vtag
!= ct
->proto
.sctp
.vtag
[dir
]) {
319 pr_debug("Verification tag check failed\n");
323 old_state
= new_state
= SCTP_CONNTRACK_NONE
;
324 spin_lock_bh(&ct
->lock
);
325 for_each_sctp_chunk (skb
, sch
, _sch
, offset
, dataoff
, count
) {
326 /* Special cases of Verification tag check (Sec 8.5.1) */
327 if (sch
->type
== SCTP_CID_INIT
) {
331 } else if (sch
->type
== SCTP_CID_ABORT
) {
333 if (sh
->vtag
!= ct
->proto
.sctp
.vtag
[dir
] &&
334 sh
->vtag
!= ct
->proto
.sctp
.vtag
[!dir
])
336 } else if (sch
->type
== SCTP_CID_SHUTDOWN_COMPLETE
) {
338 if (sh
->vtag
!= ct
->proto
.sctp
.vtag
[dir
] &&
339 sh
->vtag
!= ct
->proto
.sctp
.vtag
[!dir
] &&
340 sch
->flags
& SCTP_CHUNK_FLAG_T
)
342 } else if (sch
->type
== SCTP_CID_COOKIE_ECHO
) {
344 if (sh
->vtag
!= ct
->proto
.sctp
.vtag
[dir
])
348 old_state
= ct
->proto
.sctp
.state
;
349 new_state
= sctp_new_state(dir
, old_state
, sch
->type
);
352 if (new_state
== SCTP_CONNTRACK_MAX
) {
353 pr_debug("nf_conntrack_sctp: Invalid dir=%i ctype=%u "
355 dir
, sch
->type
, old_state
);
359 /* If it is an INIT or an INIT ACK note down the vtag */
360 if (sch
->type
== SCTP_CID_INIT
||
361 sch
->type
== SCTP_CID_INIT_ACK
) {
362 sctp_inithdr_t _inithdr
, *ih
;
364 ih
= skb_header_pointer(skb
, offset
+ sizeof(sctp_chunkhdr_t
),
365 sizeof(_inithdr
), &_inithdr
);
368 pr_debug("Setting vtag %x for dir %d\n",
370 ct
->proto
.sctp
.vtag
[!dir
] = ih
->init_tag
;
373 ct
->proto
.sctp
.state
= new_state
;
374 if (old_state
!= new_state
)
375 nf_conntrack_event_cache(IPCT_PROTOINFO
, ct
);
377 spin_unlock_bh(&ct
->lock
);
379 nf_ct_refresh_acct(ct
, ctinfo
, skb
, timeouts
[new_state
]);
381 if (old_state
== SCTP_CONNTRACK_COOKIE_ECHOED
&&
382 dir
== IP_CT_DIR_REPLY
&&
383 new_state
== SCTP_CONNTRACK_ESTABLISHED
) {
384 pr_debug("Setting assured bit\n");
385 set_bit(IPS_ASSURED_BIT
, &ct
->status
);
386 nf_conntrack_event_cache(IPCT_ASSURED
, ct
);
392 spin_unlock_bh(&ct
->lock
);
397 /* Called when a new connection for this protocol found. */
398 static bool sctp_new(struct nf_conn
*ct
, const struct sk_buff
*skb
,
399 unsigned int dataoff
, unsigned int *timeouts
)
401 enum sctp_conntrack new_state
;
402 const struct sctphdr
*sh
;
403 struct sctphdr _sctph
;
404 const struct sctp_chunkhdr
*sch
;
405 struct sctp_chunkhdr _sch
;
406 u_int32_t offset
, count
;
407 unsigned long map
[256 / sizeof(unsigned long)] = { 0 };
409 sh
= skb_header_pointer(skb
, dataoff
, sizeof(_sctph
), &_sctph
);
413 if (do_basic_checks(ct
, skb
, dataoff
, map
) != 0)
416 /* If an OOTB packet has any of these chunks discard (Sec 8.4) */
417 if (test_bit(SCTP_CID_ABORT
, map
) ||
418 test_bit(SCTP_CID_SHUTDOWN_COMPLETE
, map
) ||
419 test_bit(SCTP_CID_COOKIE_ACK
, map
))
422 memset(&ct
->proto
.sctp
, 0, sizeof(ct
->proto
.sctp
));
423 new_state
= SCTP_CONNTRACK_MAX
;
424 for_each_sctp_chunk (skb
, sch
, _sch
, offset
, dataoff
, count
) {
425 /* Don't need lock here: this conntrack not in circulation yet */
426 new_state
= sctp_new_state(IP_CT_DIR_ORIGINAL
,
427 SCTP_CONNTRACK_NONE
, sch
->type
);
429 /* Invalid: delete conntrack */
430 if (new_state
== SCTP_CONNTRACK_NONE
||
431 new_state
== SCTP_CONNTRACK_MAX
) {
432 pr_debug("nf_conntrack_sctp: invalid new deleting.\n");
436 /* Copy the vtag into the state info */
437 if (sch
->type
== SCTP_CID_INIT
) {
439 sctp_inithdr_t _inithdr
, *ih
;
441 ih
= skb_header_pointer(skb
, offset
+ sizeof(sctp_chunkhdr_t
),
442 sizeof(_inithdr
), &_inithdr
);
446 pr_debug("Setting vtag %x for new conn\n",
449 ct
->proto
.sctp
.vtag
[IP_CT_DIR_REPLY
] =
456 /* If it is a shutdown ack OOTB packet, we expect a return
457 shutdown complete, otherwise an ABORT Sec 8.4 (5) and (8) */
459 pr_debug("Setting vtag %x for new conn OOTB\n",
461 ct
->proto
.sctp
.vtag
[IP_CT_DIR_REPLY
] = sh
->vtag
;
464 ct
->proto
.sctp
.state
= new_state
;
470 #if IS_ENABLED(CONFIG_NF_CT_NETLINK)
472 #include <linux/netfilter/nfnetlink.h>
473 #include <linux/netfilter/nfnetlink_conntrack.h>
475 static int sctp_to_nlattr(struct sk_buff
*skb
, struct nlattr
*nla
,
478 struct nlattr
*nest_parms
;
480 spin_lock_bh(&ct
->lock
);
481 nest_parms
= nla_nest_start(skb
, CTA_PROTOINFO_SCTP
| NLA_F_NESTED
);
483 goto nla_put_failure
;
485 if (nla_put_u8(skb
, CTA_PROTOINFO_SCTP_STATE
, ct
->proto
.sctp
.state
) ||
486 nla_put_be32(skb
, CTA_PROTOINFO_SCTP_VTAG_ORIGINAL
,
487 ct
->proto
.sctp
.vtag
[IP_CT_DIR_ORIGINAL
]) ||
488 nla_put_be32(skb
, CTA_PROTOINFO_SCTP_VTAG_REPLY
,
489 ct
->proto
.sctp
.vtag
[IP_CT_DIR_REPLY
]))
490 goto nla_put_failure
;
492 spin_unlock_bh(&ct
->lock
);
494 nla_nest_end(skb
, nest_parms
);
499 spin_unlock_bh(&ct
->lock
);
503 static const struct nla_policy sctp_nla_policy
[CTA_PROTOINFO_SCTP_MAX
+1] = {
504 [CTA_PROTOINFO_SCTP_STATE
] = { .type
= NLA_U8
},
505 [CTA_PROTOINFO_SCTP_VTAG_ORIGINAL
] = { .type
= NLA_U32
},
506 [CTA_PROTOINFO_SCTP_VTAG_REPLY
] = { .type
= NLA_U32
},
509 static int nlattr_to_sctp(struct nlattr
*cda
[], struct nf_conn
*ct
)
511 struct nlattr
*attr
= cda
[CTA_PROTOINFO_SCTP
];
512 struct nlattr
*tb
[CTA_PROTOINFO_SCTP_MAX
+1];
515 /* updates may not contain the internal protocol info, skip parsing */
519 err
= nla_parse_nested(tb
,
520 CTA_PROTOINFO_SCTP_MAX
,
526 if (!tb
[CTA_PROTOINFO_SCTP_STATE
] ||
527 !tb
[CTA_PROTOINFO_SCTP_VTAG_ORIGINAL
] ||
528 !tb
[CTA_PROTOINFO_SCTP_VTAG_REPLY
])
531 spin_lock_bh(&ct
->lock
);
532 ct
->proto
.sctp
.state
= nla_get_u8(tb
[CTA_PROTOINFO_SCTP_STATE
]);
533 ct
->proto
.sctp
.vtag
[IP_CT_DIR_ORIGINAL
] =
534 nla_get_be32(tb
[CTA_PROTOINFO_SCTP_VTAG_ORIGINAL
]);
535 ct
->proto
.sctp
.vtag
[IP_CT_DIR_REPLY
] =
536 nla_get_be32(tb
[CTA_PROTOINFO_SCTP_VTAG_REPLY
]);
537 spin_unlock_bh(&ct
->lock
);
542 static int sctp_nlattr_size(void)
544 return nla_total_size(0) /* CTA_PROTOINFO_SCTP */
545 + nla_policy_len(sctp_nla_policy
, CTA_PROTOINFO_SCTP_MAX
+ 1);
549 #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
551 #include <linux/netfilter/nfnetlink.h>
552 #include <linux/netfilter/nfnetlink_cttimeout.h>
554 static int sctp_timeout_nlattr_to_obj(struct nlattr
*tb
[], void *data
)
556 unsigned int *timeouts
= data
;
559 /* set default SCTP timeouts. */
560 for (i
=0; i
<SCTP_CONNTRACK_MAX
; i
++)
561 timeouts
[i
] = sctp_timeouts
[i
];
563 /* there's a 1:1 mapping between attributes and protocol states. */
564 for (i
=CTA_TIMEOUT_SCTP_UNSPEC
+1; i
<CTA_TIMEOUT_SCTP_MAX
+1; i
++) {
566 timeouts
[i
] = ntohl(nla_get_be32(tb
[i
])) * HZ
;
573 sctp_timeout_obj_to_nlattr(struct sk_buff
*skb
, const void *data
)
575 const unsigned int *timeouts
= data
;
578 for (i
=CTA_TIMEOUT_SCTP_UNSPEC
+1; i
<CTA_TIMEOUT_SCTP_MAX
+1; i
++) {
579 if (nla_put_be32(skb
, i
, htonl(timeouts
[i
] / HZ
)))
580 goto nla_put_failure
;
588 static const struct nla_policy
589 sctp_timeout_nla_policy
[CTA_TIMEOUT_SCTP_MAX
+1] = {
590 [CTA_TIMEOUT_SCTP_CLOSED
] = { .type
= NLA_U32
},
591 [CTA_TIMEOUT_SCTP_COOKIE_WAIT
] = { .type
= NLA_U32
},
592 [CTA_TIMEOUT_SCTP_COOKIE_ECHOED
] = { .type
= NLA_U32
},
593 [CTA_TIMEOUT_SCTP_ESTABLISHED
] = { .type
= NLA_U32
},
594 [CTA_TIMEOUT_SCTP_SHUTDOWN_SENT
] = { .type
= NLA_U32
},
595 [CTA_TIMEOUT_SCTP_SHUTDOWN_RECD
] = { .type
= NLA_U32
},
596 [CTA_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT
] = { .type
= NLA_U32
},
598 #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
602 static unsigned int sctp_sysctl_table_users
;
603 static struct ctl_table_header
*sctp_sysctl_header
;
604 static struct ctl_table sctp_sysctl_table
[] = {
606 .procname
= "nf_conntrack_sctp_timeout_closed",
607 .data
= &sctp_timeouts
[SCTP_CONNTRACK_CLOSED
],
608 .maxlen
= sizeof(unsigned int),
610 .proc_handler
= proc_dointvec_jiffies
,
613 .procname
= "nf_conntrack_sctp_timeout_cookie_wait",
614 .data
= &sctp_timeouts
[SCTP_CONNTRACK_COOKIE_WAIT
],
615 .maxlen
= sizeof(unsigned int),
617 .proc_handler
= proc_dointvec_jiffies
,
620 .procname
= "nf_conntrack_sctp_timeout_cookie_echoed",
621 .data
= &sctp_timeouts
[SCTP_CONNTRACK_COOKIE_ECHOED
],
622 .maxlen
= sizeof(unsigned int),
624 .proc_handler
= proc_dointvec_jiffies
,
627 .procname
= "nf_conntrack_sctp_timeout_established",
628 .data
= &sctp_timeouts
[SCTP_CONNTRACK_ESTABLISHED
],
629 .maxlen
= sizeof(unsigned int),
631 .proc_handler
= proc_dointvec_jiffies
,
634 .procname
= "nf_conntrack_sctp_timeout_shutdown_sent",
635 .data
= &sctp_timeouts
[SCTP_CONNTRACK_SHUTDOWN_SENT
],
636 .maxlen
= sizeof(unsigned int),
638 .proc_handler
= proc_dointvec_jiffies
,
641 .procname
= "nf_conntrack_sctp_timeout_shutdown_recd",
642 .data
= &sctp_timeouts
[SCTP_CONNTRACK_SHUTDOWN_RECD
],
643 .maxlen
= sizeof(unsigned int),
645 .proc_handler
= proc_dointvec_jiffies
,
648 .procname
= "nf_conntrack_sctp_timeout_shutdown_ack_sent",
649 .data
= &sctp_timeouts
[SCTP_CONNTRACK_SHUTDOWN_ACK_SENT
],
650 .maxlen
= sizeof(unsigned int),
652 .proc_handler
= proc_dointvec_jiffies
,
657 #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
658 static struct ctl_table sctp_compat_sysctl_table
[] = {
660 .procname
= "ip_conntrack_sctp_timeout_closed",
661 .data
= &sctp_timeouts
[SCTP_CONNTRACK_CLOSED
],
662 .maxlen
= sizeof(unsigned int),
664 .proc_handler
= proc_dointvec_jiffies
,
667 .procname
= "ip_conntrack_sctp_timeout_cookie_wait",
668 .data
= &sctp_timeouts
[SCTP_CONNTRACK_COOKIE_WAIT
],
669 .maxlen
= sizeof(unsigned int),
671 .proc_handler
= proc_dointvec_jiffies
,
674 .procname
= "ip_conntrack_sctp_timeout_cookie_echoed",
675 .data
= &sctp_timeouts
[SCTP_CONNTRACK_COOKIE_ECHOED
],
676 .maxlen
= sizeof(unsigned int),
678 .proc_handler
= proc_dointvec_jiffies
,
681 .procname
= "ip_conntrack_sctp_timeout_established",
682 .data
= &sctp_timeouts
[SCTP_CONNTRACK_ESTABLISHED
],
683 .maxlen
= sizeof(unsigned int),
685 .proc_handler
= proc_dointvec_jiffies
,
688 .procname
= "ip_conntrack_sctp_timeout_shutdown_sent",
689 .data
= &sctp_timeouts
[SCTP_CONNTRACK_SHUTDOWN_SENT
],
690 .maxlen
= sizeof(unsigned int),
692 .proc_handler
= proc_dointvec_jiffies
,
695 .procname
= "ip_conntrack_sctp_timeout_shutdown_recd",
696 .data
= &sctp_timeouts
[SCTP_CONNTRACK_SHUTDOWN_RECD
],
697 .maxlen
= sizeof(unsigned int),
699 .proc_handler
= proc_dointvec_jiffies
,
702 .procname
= "ip_conntrack_sctp_timeout_shutdown_ack_sent",
703 .data
= &sctp_timeouts
[SCTP_CONNTRACK_SHUTDOWN_ACK_SENT
],
704 .maxlen
= sizeof(unsigned int),
706 .proc_handler
= proc_dointvec_jiffies
,
710 #endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
713 static struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp4 __read_mostly
= {
715 .l4proto
= IPPROTO_SCTP
,
717 .pkt_to_tuple
= sctp_pkt_to_tuple
,
718 .invert_tuple
= sctp_invert_tuple
,
719 .print_tuple
= sctp_print_tuple
,
720 .print_conntrack
= sctp_print_conntrack
,
721 .packet
= sctp_packet
,
722 .get_timeouts
= sctp_get_timeouts
,
725 #if IS_ENABLED(CONFIG_NF_CT_NETLINK)
726 .to_nlattr
= sctp_to_nlattr
,
727 .nlattr_size
= sctp_nlattr_size
,
728 .from_nlattr
= nlattr_to_sctp
,
729 .tuple_to_nlattr
= nf_ct_port_tuple_to_nlattr
,
730 .nlattr_tuple_size
= nf_ct_port_nlattr_tuple_size
,
731 .nlattr_to_tuple
= nf_ct_port_nlattr_to_tuple
,
732 .nla_policy
= nf_ct_port_nla_policy
,
734 #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
736 .nlattr_to_obj
= sctp_timeout_nlattr_to_obj
,
737 .obj_to_nlattr
= sctp_timeout_obj_to_nlattr
,
738 .nlattr_max
= CTA_TIMEOUT_SCTP_MAX
,
739 .obj_size
= sizeof(unsigned int) * SCTP_CONNTRACK_MAX
,
740 .nla_policy
= sctp_timeout_nla_policy
,
742 #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
744 .ctl_table_users
= &sctp_sysctl_table_users
,
745 .ctl_table_header
= &sctp_sysctl_header
,
746 .ctl_table
= sctp_sysctl_table
,
747 #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
748 .ctl_compat_table
= sctp_compat_sysctl_table
,
753 static struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp6 __read_mostly
= {
755 .l4proto
= IPPROTO_SCTP
,
757 .pkt_to_tuple
= sctp_pkt_to_tuple
,
758 .invert_tuple
= sctp_invert_tuple
,
759 .print_tuple
= sctp_print_tuple
,
760 .print_conntrack
= sctp_print_conntrack
,
761 .packet
= sctp_packet
,
762 .get_timeouts
= sctp_get_timeouts
,
765 #if IS_ENABLED(CONFIG_NF_CT_NETLINK)
766 .to_nlattr
= sctp_to_nlattr
,
767 .nlattr_size
= sctp_nlattr_size
,
768 .from_nlattr
= nlattr_to_sctp
,
769 .tuple_to_nlattr
= nf_ct_port_tuple_to_nlattr
,
770 .nlattr_tuple_size
= nf_ct_port_nlattr_tuple_size
,
771 .nlattr_to_tuple
= nf_ct_port_nlattr_to_tuple
,
772 .nla_policy
= nf_ct_port_nla_policy
,
773 #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
775 .nlattr_to_obj
= sctp_timeout_nlattr_to_obj
,
776 .obj_to_nlattr
= sctp_timeout_obj_to_nlattr
,
777 .nlattr_max
= CTA_TIMEOUT_SCTP_MAX
,
778 .obj_size
= sizeof(unsigned int) * SCTP_CONNTRACK_MAX
,
779 .nla_policy
= sctp_timeout_nla_policy
,
781 #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
784 .ctl_table_users
= &sctp_sysctl_table_users
,
785 .ctl_table_header
= &sctp_sysctl_header
,
786 .ctl_table
= sctp_sysctl_table
,
790 static int __init
nf_conntrack_proto_sctp_init(void)
794 ret
= nf_conntrack_l4proto_register(&nf_conntrack_l4proto_sctp4
);
796 pr_err("nf_conntrack_l4proto_sctp4: protocol register failed\n");
799 ret
= nf_conntrack_l4proto_register(&nf_conntrack_l4proto_sctp6
);
801 pr_err("nf_conntrack_l4proto_sctp6: protocol register failed\n");
808 nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_sctp4
);
813 static void __exit
nf_conntrack_proto_sctp_fini(void)
815 nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_sctp6
);
816 nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_sctp4
);
819 module_init(nf_conntrack_proto_sctp_init
);
820 module_exit(nf_conntrack_proto_sctp_fini
);
822 MODULE_LICENSE("GPL");
823 MODULE_AUTHOR("Kiran Kumar Immidi");
824 MODULE_DESCRIPTION("Netfilter connection tracking protocol helper for SCTP");
825 MODULE_ALIAS("ip_conntrack_proto_sctp");