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Commit | Line | Data |
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9fb9cbb1 YK |
1 | /* |
2 | * Connection tracking protocol helper module for SCTP. | |
601e68e1 | 3 | * |
f229f6ce PM |
4 | * Copyright (c) 2004 Kiran Kumar Immidi <immidi_kiran@yahoo.com> |
5 | * Copyright (c) 2004-2012 Patrick McHardy <kaber@trash.net> | |
6 | * | |
601e68e1 | 7 | * SCTP is defined in RFC 2960. References to various sections in this code |
9fb9cbb1 | 8 | * are to this RFC. |
601e68e1 | 9 | * |
9fb9cbb1 YK |
10 | * This program is free software; you can redistribute it and/or modify |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
9fb9cbb1 YK |
13 | */ |
14 | ||
15 | #include <linux/types.h> | |
9fb9cbb1 YK |
16 | #include <linux/timer.h> |
17 | #include <linux/netfilter.h> | |
9fb9cbb1 YK |
18 | #include <linux/in.h> |
19 | #include <linux/ip.h> | |
20 | #include <linux/sctp.h> | |
21 | #include <linux/string.h> | |
22 | #include <linux/seq_file.h> | |
40a839fd YK |
23 | #include <linux/spinlock.h> |
24 | #include <linux/interrupt.h> | |
9fb9cbb1 YK |
25 | |
26 | #include <net/netfilter/nf_conntrack.h> | |
605dcad6 | 27 | #include <net/netfilter/nf_conntrack_l4proto.h> |
f6180121 | 28 | #include <net/netfilter/nf_conntrack_ecache.h> |
9fb9cbb1 | 29 | |
9fb9cbb1 | 30 | /* FIXME: Examine ipfilter's timeouts and conntrack transitions more |
601e68e1 | 31 | closely. They're more complex. --RR |
9fb9cbb1 YK |
32 | |
33 | And so for me for SCTP :D -Kiran */ | |
34 | ||
12c33aa2 | 35 | static const char *const sctp_conntrack_names[] = { |
9fb9cbb1 YK |
36 | "NONE", |
37 | "CLOSED", | |
38 | "COOKIE_WAIT", | |
39 | "COOKIE_ECHOED", | |
40 | "ESTABLISHED", | |
41 | "SHUTDOWN_SENT", | |
42 | "SHUTDOWN_RECD", | |
43 | "SHUTDOWN_ACK_SENT", | |
d7ee3519 MK |
44 | "HEARTBEAT_SENT", |
45 | "HEARTBEAT_ACKED", | |
9fb9cbb1 YK |
46 | }; |
47 | ||
48 | #define SECS * HZ | |
49 | #define MINS * 60 SECS | |
50 | #define HOURS * 60 MINS | |
51 | #define DAYS * 24 HOURS | |
52 | ||
86c0bf40 PM |
53 | static unsigned int sctp_timeouts[SCTP_CONNTRACK_MAX] __read_mostly = { |
54 | [SCTP_CONNTRACK_CLOSED] = 10 SECS, | |
55 | [SCTP_CONNTRACK_COOKIE_WAIT] = 3 SECS, | |
56 | [SCTP_CONNTRACK_COOKIE_ECHOED] = 3 SECS, | |
57 | [SCTP_CONNTRACK_ESTABLISHED] = 5 DAYS, | |
58 | [SCTP_CONNTRACK_SHUTDOWN_SENT] = 300 SECS / 1000, | |
59 | [SCTP_CONNTRACK_SHUTDOWN_RECD] = 300 SECS / 1000, | |
60 | [SCTP_CONNTRACK_SHUTDOWN_ACK_SENT] = 3 SECS, | |
d7ee3519 MK |
61 | [SCTP_CONNTRACK_HEARTBEAT_SENT] = 30 SECS, |
62 | [SCTP_CONNTRACK_HEARTBEAT_ACKED] = 210 SECS, | |
86c0bf40 | 63 | }; |
9fb9cbb1 YK |
64 | |
65 | #define sNO SCTP_CONNTRACK_NONE | |
66 | #define sCL SCTP_CONNTRACK_CLOSED | |
67 | #define sCW SCTP_CONNTRACK_COOKIE_WAIT | |
68 | #define sCE SCTP_CONNTRACK_COOKIE_ECHOED | |
69 | #define sES SCTP_CONNTRACK_ESTABLISHED | |
70 | #define sSS SCTP_CONNTRACK_SHUTDOWN_SENT | |
71 | #define sSR SCTP_CONNTRACK_SHUTDOWN_RECD | |
72 | #define sSA SCTP_CONNTRACK_SHUTDOWN_ACK_SENT | |
d7ee3519 MK |
73 | #define sHS SCTP_CONNTRACK_HEARTBEAT_SENT |
74 | #define sHA SCTP_CONNTRACK_HEARTBEAT_ACKED | |
9fb9cbb1 YK |
75 | #define sIV SCTP_CONNTRACK_MAX |
76 | ||
601e68e1 | 77 | /* |
9fb9cbb1 YK |
78 | These are the descriptions of the states: |
79 | ||
601e68e1 | 80 | NOTE: These state names are tantalizingly similar to the states of an |
9fb9cbb1 | 81 | SCTP endpoint. But the interpretation of the states is a little different, |
601e68e1 | 82 | considering that these are the states of the connection and not of an end |
9fb9cbb1 YK |
83 | point. Please note the subtleties. -Kiran |
84 | ||
85 | NONE - Nothing so far. | |
601e68e1 YH |
86 | COOKIE WAIT - We have seen an INIT chunk in the original direction, or also |
87 | an INIT_ACK chunk in the reply direction. | |
9fb9cbb1 YK |
88 | COOKIE ECHOED - We have seen a COOKIE_ECHO chunk in the original direction. |
89 | ESTABLISHED - We have seen a COOKIE_ACK in the reply direction. | |
90 | SHUTDOWN_SENT - We have seen a SHUTDOWN chunk in the original direction. | |
91 | SHUTDOWN_RECD - We have seen a SHUTDOWN chunk in the reply directoin. | |
92 | SHUTDOWN_ACK_SENT - We have seen a SHUTDOWN_ACK chunk in the direction opposite | |
601e68e1 YH |
93 | to that of the SHUTDOWN chunk. |
94 | CLOSED - We have seen a SHUTDOWN_COMPLETE chunk in the direction of | |
95 | the SHUTDOWN chunk. Connection is closed. | |
d7ee3519 MK |
96 | HEARTBEAT_SENT - We have seen a HEARTBEAT in a new flow. |
97 | HEARTBEAT_ACKED - We have seen a HEARTBEAT-ACK in the direction opposite to | |
98 | that of the HEARTBEAT chunk. Secondary connection is | |
99 | established. | |
9fb9cbb1 YK |
100 | */ |
101 | ||
102 | /* TODO | |
601e68e1 | 103 | - I have assumed that the first INIT is in the original direction. |
9fb9cbb1 YK |
104 | This messes things when an INIT comes in the reply direction in CLOSED |
105 | state. | |
601e68e1 | 106 | - Check the error type in the reply dir before transitioning from |
9fb9cbb1 YK |
107 | cookie echoed to closed. |
108 | - Sec 5.2.4 of RFC 2960 | |
d7ee3519 | 109 | - Full Multi Homing support. |
9fb9cbb1 YK |
110 | */ |
111 | ||
112 | /* SCTP conntrack state transitions */ | |
d7ee3519 | 113 | static const u8 sctp_conntracks[2][11][SCTP_CONNTRACK_MAX] = { |
9fb9cbb1 YK |
114 | { |
115 | /* ORIGINAL */ | |
d7ee3519 MK |
116 | /* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA, sHS, sHA */ |
117 | /* init */ {sCW, sCW, sCW, sCE, sES, sSS, sSR, sSA, sCW, sHA}, | |
118 | /* init_ack */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA, sCL, sHA}, | |
119 | /* abort */ {sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL}, | |
120 | /* shutdown */ {sCL, sCL, sCW, sCE, sSS, sSS, sSR, sSA, sCL, sSS}, | |
121 | /* shutdown_ack */ {sSA, sCL, sCW, sCE, sES, sSA, sSA, sSA, sSA, sHA}, | |
122 | /* error */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA, sCL, sHA},/* Can't have Stale cookie*/ | |
123 | /* cookie_echo */ {sCL, sCL, sCE, sCE, sES, sSS, sSR, sSA, sCL, sHA},/* 5.2.4 - Big TODO */ | |
124 | /* cookie_ack */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA, sCL, sHA},/* Can't come in orig dir */ | |
125 | /* shutdown_comp*/ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sCL, sCL, sHA}, | |
126 | /* heartbeat */ {sHS, sCL, sCW, sCE, sES, sSS, sSR, sSA, sHS, sHA}, | |
127 | /* heartbeat_ack*/ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA, sHS, sHA} | |
9fb9cbb1 YK |
128 | }, |
129 | { | |
130 | /* REPLY */ | |
d7ee3519 MK |
131 | /* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA, sHS, sHA */ |
132 | /* init */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA, sIV, sHA},/* INIT in sCL Big TODO */ | |
133 | /* init_ack */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA, sIV, sHA}, | |
134 | /* abort */ {sIV, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sIV, sCL}, | |
135 | /* shutdown */ {sIV, sCL, sCW, sCE, sSR, sSS, sSR, sSA, sIV, sSR}, | |
136 | /* shutdown_ack */ {sIV, sCL, sCW, sCE, sES, sSA, sSA, sSA, sIV, sHA}, | |
137 | /* error */ {sIV, sCL, sCW, sCL, sES, sSS, sSR, sSA, sIV, sHA}, | |
138 | /* cookie_echo */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA, sIV, sHA},/* Can't come in reply dir */ | |
139 | /* cookie_ack */ {sIV, sCL, sCW, sES, sES, sSS, sSR, sSA, sIV, sHA}, | |
140 | /* shutdown_comp*/ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sCL, sIV, sHA}, | |
141 | /* heartbeat */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA, sHS, sHA}, | |
142 | /* heartbeat_ack*/ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA, sHA, sHA} | |
9fb9cbb1 YK |
143 | } |
144 | }; | |
145 | ||
a85406af | 146 | static inline struct nf_sctp_net *sctp_pernet(struct net *net) |
49d485a3 | 147 | { |
a85406af | 148 | return &net->ct.nf_ct_proto.sctp; |
49d485a3 G |
149 | } |
150 | ||
09f263cd | 151 | static bool sctp_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff, |
a31f1adc | 152 | struct net *net, struct nf_conntrack_tuple *tuple) |
9fb9cbb1 | 153 | { |
12c33aa2 JE |
154 | const struct sctphdr *hp; |
155 | struct sctphdr _hdr; | |
9fb9cbb1 | 156 | |
e5e693ab GF |
157 | /* Actually only need first 4 bytes to get ports. */ |
158 | hp = skb_header_pointer(skb, dataoff, 4, &_hdr); | |
9fb9cbb1 | 159 | if (hp == NULL) |
09f263cd | 160 | return false; |
9fb9cbb1 YK |
161 | |
162 | tuple->src.u.sctp.port = hp->source; | |
163 | tuple->dst.u.sctp.port = hp->dest; | |
09f263cd | 164 | return true; |
9fb9cbb1 YK |
165 | } |
166 | ||
09f263cd JE |
167 | static bool sctp_invert_tuple(struct nf_conntrack_tuple *tuple, |
168 | const struct nf_conntrack_tuple *orig) | |
9fb9cbb1 | 169 | { |
9fb9cbb1 YK |
170 | tuple->src.u.sctp.port = orig->dst.u.sctp.port; |
171 | tuple->dst.u.sctp.port = orig->src.u.sctp.port; | |
09f263cd | 172 | return true; |
9fb9cbb1 YK |
173 | } |
174 | ||
175 | /* Print out the per-protocol part of the tuple. */ | |
824f1fbe JP |
176 | static void sctp_print_tuple(struct seq_file *s, |
177 | const struct nf_conntrack_tuple *tuple) | |
9fb9cbb1 | 178 | { |
824f1fbe JP |
179 | seq_printf(s, "sport=%hu dport=%hu ", |
180 | ntohs(tuple->src.u.sctp.port), | |
181 | ntohs(tuple->dst.u.sctp.port)); | |
9fb9cbb1 YK |
182 | } |
183 | ||
184 | /* Print out the private part of the conntrack. */ | |
37246a58 | 185 | static void sctp_print_conntrack(struct seq_file *s, struct nf_conn *ct) |
9fb9cbb1 | 186 | { |
a163f2cb | 187 | seq_printf(s, "%s ", sctp_conntrack_names[ct->proto.sctp.state]); |
9fb9cbb1 YK |
188 | } |
189 | ||
190 | #define for_each_sctp_chunk(skb, sch, _sch, offset, dataoff, count) \ | |
e79ec50b JE |
191 | for ((offset) = (dataoff) + sizeof(sctp_sctphdr_t), (count) = 0; \ |
192 | (offset) < (skb)->len && \ | |
193 | ((sch) = skb_header_pointer((skb), (offset), sizeof(_sch), &(_sch))); \ | |
194 | (offset) += (ntohs((sch)->length) + 3) & ~3, (count)++) | |
9fb9cbb1 YK |
195 | |
196 | /* Some validity checks to make sure the chunks are fine */ | |
112f35c9 | 197 | static int do_basic_checks(struct nf_conn *ct, |
9fb9cbb1 YK |
198 | const struct sk_buff *skb, |
199 | unsigned int dataoff, | |
35c6d3cb | 200 | unsigned long *map) |
9fb9cbb1 YK |
201 | { |
202 | u_int32_t offset, count; | |
203 | sctp_chunkhdr_t _sch, *sch; | |
204 | int flag; | |
205 | ||
9fb9cbb1 YK |
206 | flag = 0; |
207 | ||
208 | for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) { | |
0d53778e | 209 | pr_debug("Chunk Num: %d Type: %d\n", count, sch->type); |
9fb9cbb1 | 210 | |
5447d477 PM |
211 | if (sch->type == SCTP_CID_INIT || |
212 | sch->type == SCTP_CID_INIT_ACK || | |
213 | sch->type == SCTP_CID_SHUTDOWN_COMPLETE) | |
9fb9cbb1 | 214 | flag = 1; |
9fb9cbb1 | 215 | |
e17df688 PM |
216 | /* |
217 | * Cookie Ack/Echo chunks not the first OR | |
218 | * Init / Init Ack / Shutdown compl chunks not the only chunks | |
219 | * OR zero-length. | |
220 | */ | |
5447d477 PM |
221 | if (((sch->type == SCTP_CID_COOKIE_ACK || |
222 | sch->type == SCTP_CID_COOKIE_ECHO || | |
223 | flag) && | |
224 | count != 0) || !sch->length) { | |
0d53778e | 225 | pr_debug("Basic checks failed\n"); |
9fb9cbb1 YK |
226 | return 1; |
227 | } | |
228 | ||
5447d477 | 229 | if (map) |
35c6d3cb | 230 | set_bit(sch->type, map); |
9fb9cbb1 YK |
231 | } |
232 | ||
0d53778e | 233 | pr_debug("Basic checks passed\n"); |
dd7271fe | 234 | return count == 0; |
9fb9cbb1 YK |
235 | } |
236 | ||
efe9f68a PM |
237 | static int sctp_new_state(enum ip_conntrack_dir dir, |
238 | enum sctp_conntrack cur_state, | |
239 | int chunk_type) | |
9fb9cbb1 YK |
240 | { |
241 | int i; | |
242 | ||
0d53778e | 243 | pr_debug("Chunk type: %d\n", chunk_type); |
9fb9cbb1 YK |
244 | |
245 | switch (chunk_type) { | |
5447d477 PM |
246 | case SCTP_CID_INIT: |
247 | pr_debug("SCTP_CID_INIT\n"); | |
248 | i = 0; | |
249 | break; | |
250 | case SCTP_CID_INIT_ACK: | |
251 | pr_debug("SCTP_CID_INIT_ACK\n"); | |
252 | i = 1; | |
253 | break; | |
254 | case SCTP_CID_ABORT: | |
255 | pr_debug("SCTP_CID_ABORT\n"); | |
256 | i = 2; | |
257 | break; | |
258 | case SCTP_CID_SHUTDOWN: | |
259 | pr_debug("SCTP_CID_SHUTDOWN\n"); | |
260 | i = 3; | |
261 | break; | |
262 | case SCTP_CID_SHUTDOWN_ACK: | |
263 | pr_debug("SCTP_CID_SHUTDOWN_ACK\n"); | |
264 | i = 4; | |
265 | break; | |
266 | case SCTP_CID_ERROR: | |
267 | pr_debug("SCTP_CID_ERROR\n"); | |
268 | i = 5; | |
269 | break; | |
270 | case SCTP_CID_COOKIE_ECHO: | |
271 | pr_debug("SCTP_CID_COOKIE_ECHO\n"); | |
272 | i = 6; | |
273 | break; | |
274 | case SCTP_CID_COOKIE_ACK: | |
275 | pr_debug("SCTP_CID_COOKIE_ACK\n"); | |
276 | i = 7; | |
277 | break; | |
278 | case SCTP_CID_SHUTDOWN_COMPLETE: | |
279 | pr_debug("SCTP_CID_SHUTDOWN_COMPLETE\n"); | |
280 | i = 8; | |
281 | break; | |
d7ee3519 MK |
282 | case SCTP_CID_HEARTBEAT: |
283 | pr_debug("SCTP_CID_HEARTBEAT"); | |
284 | i = 9; | |
285 | break; | |
286 | case SCTP_CID_HEARTBEAT_ACK: | |
287 | pr_debug("SCTP_CID_HEARTBEAT_ACK"); | |
288 | i = 10; | |
289 | break; | |
5447d477 | 290 | default: |
d7ee3519 | 291 | /* Other chunks like DATA or SACK do not change the state */ |
5447d477 PM |
292 | pr_debug("Unknown chunk type, Will stay in %s\n", |
293 | sctp_conntrack_names[cur_state]); | |
294 | return cur_state; | |
9fb9cbb1 YK |
295 | } |
296 | ||
0d53778e PM |
297 | pr_debug("dir: %d cur_state: %s chunk_type: %d new_state: %s\n", |
298 | dir, sctp_conntrack_names[cur_state], chunk_type, | |
299 | sctp_conntrack_names[sctp_conntracks[dir][i][cur_state]]); | |
9fb9cbb1 YK |
300 | |
301 | return sctp_conntracks[dir][i][cur_state]; | |
302 | } | |
303 | ||
2c8503f5 PNA |
304 | static unsigned int *sctp_get_timeouts(struct net *net) |
305 | { | |
49d485a3 | 306 | return sctp_pernet(net)->timeouts; |
2c8503f5 PNA |
307 | } |
308 | ||
b37e933a | 309 | /* Returns verdict for packet, or -NF_ACCEPT for invalid. */ |
112f35c9 | 310 | static int sctp_packet(struct nf_conn *ct, |
9fb9cbb1 YK |
311 | const struct sk_buff *skb, |
312 | unsigned int dataoff, | |
313 | enum ip_conntrack_info ctinfo, | |
76108cea | 314 | u_int8_t pf, |
2c8503f5 PNA |
315 | unsigned int hooknum, |
316 | unsigned int *timeouts) | |
9fb9cbb1 | 317 | { |
efe9f68a | 318 | enum sctp_conntrack new_state, old_state; |
8528819a | 319 | enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo); |
12c33aa2 JE |
320 | const struct sctphdr *sh; |
321 | struct sctphdr _sctph; | |
322 | const struct sctp_chunkhdr *sch; | |
323 | struct sctp_chunkhdr _sch; | |
9fb9cbb1 | 324 | u_int32_t offset, count; |
35c6d3cb | 325 | unsigned long map[256 / sizeof(unsigned long)] = { 0 }; |
9fb9cbb1 | 326 | |
9fb9cbb1 YK |
327 | sh = skb_header_pointer(skb, dataoff, sizeof(_sctph), &_sctph); |
328 | if (sh == NULL) | |
b37e933a | 329 | goto out; |
9fb9cbb1 | 330 | |
112f35c9 | 331 | if (do_basic_checks(ct, skb, dataoff, map) != 0) |
b37e933a | 332 | goto out; |
9fb9cbb1 YK |
333 | |
334 | /* Check the verification tag (Sec 8.5) */ | |
35c6d3cb PM |
335 | if (!test_bit(SCTP_CID_INIT, map) && |
336 | !test_bit(SCTP_CID_SHUTDOWN_COMPLETE, map) && | |
337 | !test_bit(SCTP_CID_COOKIE_ECHO, map) && | |
338 | !test_bit(SCTP_CID_ABORT, map) && | |
339 | !test_bit(SCTP_CID_SHUTDOWN_ACK, map) && | |
d7ee3519 MK |
340 | !test_bit(SCTP_CID_HEARTBEAT, map) && |
341 | !test_bit(SCTP_CID_HEARTBEAT_ACK, map) && | |
8528819a | 342 | sh->vtag != ct->proto.sctp.vtag[dir]) { |
0d53778e | 343 | pr_debug("Verification tag check failed\n"); |
b37e933a | 344 | goto out; |
9fb9cbb1 YK |
345 | } |
346 | ||
328bd899 | 347 | old_state = new_state = SCTP_CONNTRACK_NONE; |
440f0d58 | 348 | spin_lock_bh(&ct->lock); |
9fb9cbb1 | 349 | for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) { |
9fb9cbb1 YK |
350 | /* Special cases of Verification tag check (Sec 8.5.1) */ |
351 | if (sch->type == SCTP_CID_INIT) { | |
352 | /* Sec 8.5.1 (A) */ | |
b37e933a PM |
353 | if (sh->vtag != 0) |
354 | goto out_unlock; | |
9fb9cbb1 YK |
355 | } else if (sch->type == SCTP_CID_ABORT) { |
356 | /* Sec 8.5.1 (B) */ | |
8528819a | 357 | if (sh->vtag != ct->proto.sctp.vtag[dir] && |
b37e933a PM |
358 | sh->vtag != ct->proto.sctp.vtag[!dir]) |
359 | goto out_unlock; | |
9fb9cbb1 YK |
360 | } else if (sch->type == SCTP_CID_SHUTDOWN_COMPLETE) { |
361 | /* Sec 8.5.1 (C) */ | |
8528819a PM |
362 | if (sh->vtag != ct->proto.sctp.vtag[dir] && |
363 | sh->vtag != ct->proto.sctp.vtag[!dir] && | |
9b1c2cfd | 364 | sch->flags & SCTP_CHUNK_FLAG_T) |
b37e933a | 365 | goto out_unlock; |
9fb9cbb1 YK |
366 | } else if (sch->type == SCTP_CID_COOKIE_ECHO) { |
367 | /* Sec 8.5.1 (D) */ | |
b37e933a PM |
368 | if (sh->vtag != ct->proto.sctp.vtag[dir]) |
369 | goto out_unlock; | |
d7ee3519 MK |
370 | } else if (sch->type == SCTP_CID_HEARTBEAT || |
371 | sch->type == SCTP_CID_HEARTBEAT_ACK) { | |
372 | if (ct->proto.sctp.vtag[dir] == 0) { | |
373 | pr_debug("Setting vtag %x for dir %d\n", | |
374 | sh->vtag, dir); | |
375 | ct->proto.sctp.vtag[dir] = sh->vtag; | |
376 | } else if (sh->vtag != ct->proto.sctp.vtag[dir]) { | |
377 | pr_debug("Verification tag check failed\n"); | |
378 | goto out_unlock; | |
379 | } | |
9fb9cbb1 YK |
380 | } |
381 | ||
efe9f68a PM |
382 | old_state = ct->proto.sctp.state; |
383 | new_state = sctp_new_state(dir, old_state, sch->type); | |
9fb9cbb1 YK |
384 | |
385 | /* Invalid */ | |
efe9f68a | 386 | if (new_state == SCTP_CONNTRACK_MAX) { |
0d53778e PM |
387 | pr_debug("nf_conntrack_sctp: Invalid dir=%i ctype=%u " |
388 | "conntrack=%u\n", | |
efe9f68a | 389 | dir, sch->type, old_state); |
b37e933a | 390 | goto out_unlock; |
9fb9cbb1 YK |
391 | } |
392 | ||
393 | /* If it is an INIT or an INIT ACK note down the vtag */ | |
5447d477 PM |
394 | if (sch->type == SCTP_CID_INIT || |
395 | sch->type == SCTP_CID_INIT_ACK) { | |
9fb9cbb1 YK |
396 | sctp_inithdr_t _inithdr, *ih; |
397 | ||
398 | ih = skb_header_pointer(skb, offset + sizeof(sctp_chunkhdr_t), | |
601e68e1 | 399 | sizeof(_inithdr), &_inithdr); |
b37e933a PM |
400 | if (ih == NULL) |
401 | goto out_unlock; | |
0d53778e | 402 | pr_debug("Setting vtag %x for dir %d\n", |
8528819a PM |
403 | ih->init_tag, !dir); |
404 | ct->proto.sctp.vtag[!dir] = ih->init_tag; | |
9fb9cbb1 YK |
405 | } |
406 | ||
efe9f68a PM |
407 | ct->proto.sctp.state = new_state; |
408 | if (old_state != new_state) | |
a71996fc | 409 | nf_conntrack_event_cache(IPCT_PROTOINFO, ct); |
9fb9cbb1 | 410 | } |
440f0d58 | 411 | spin_unlock_bh(&ct->lock); |
9fb9cbb1 | 412 | |
2c8503f5 | 413 | nf_ct_refresh_acct(ct, ctinfo, skb, timeouts[new_state]); |
9fb9cbb1 | 414 | |
efe9f68a | 415 | if (old_state == SCTP_CONNTRACK_COOKIE_ECHOED && |
8528819a | 416 | dir == IP_CT_DIR_REPLY && |
efe9f68a | 417 | new_state == SCTP_CONNTRACK_ESTABLISHED) { |
0d53778e | 418 | pr_debug("Setting assured bit\n"); |
112f35c9 | 419 | set_bit(IPS_ASSURED_BIT, &ct->status); |
858b3133 | 420 | nf_conntrack_event_cache(IPCT_ASSURED, ct); |
9fb9cbb1 YK |
421 | } |
422 | ||
423 | return NF_ACCEPT; | |
b37e933a PM |
424 | |
425 | out_unlock: | |
440f0d58 | 426 | spin_unlock_bh(&ct->lock); |
b37e933a PM |
427 | out: |
428 | return -NF_ACCEPT; | |
9fb9cbb1 YK |
429 | } |
430 | ||
431 | /* Called when a new connection for this protocol found. */ | |
09f263cd | 432 | static bool sctp_new(struct nf_conn *ct, const struct sk_buff *skb, |
2c8503f5 | 433 | unsigned int dataoff, unsigned int *timeouts) |
9fb9cbb1 | 434 | { |
efe9f68a | 435 | enum sctp_conntrack new_state; |
12c33aa2 JE |
436 | const struct sctphdr *sh; |
437 | struct sctphdr _sctph; | |
438 | const struct sctp_chunkhdr *sch; | |
439 | struct sctp_chunkhdr _sch; | |
9fb9cbb1 | 440 | u_int32_t offset, count; |
35c6d3cb | 441 | unsigned long map[256 / sizeof(unsigned long)] = { 0 }; |
9fb9cbb1 | 442 | |
9fb9cbb1 YK |
443 | sh = skb_header_pointer(skb, dataoff, sizeof(_sctph), &_sctph); |
444 | if (sh == NULL) | |
09f263cd | 445 | return false; |
9fb9cbb1 | 446 | |
112f35c9 | 447 | if (do_basic_checks(ct, skb, dataoff, map) != 0) |
09f263cd | 448 | return false; |
9fb9cbb1 YK |
449 | |
450 | /* If an OOTB packet has any of these chunks discard (Sec 8.4) */ | |
35c6d3cb PM |
451 | if (test_bit(SCTP_CID_ABORT, map) || |
452 | test_bit(SCTP_CID_SHUTDOWN_COMPLETE, map) || | |
453 | test_bit(SCTP_CID_COOKIE_ACK, map)) | |
09f263cd | 454 | return false; |
9fb9cbb1 | 455 | |
e5fc9e7a | 456 | memset(&ct->proto.sctp, 0, sizeof(ct->proto.sctp)); |
efe9f68a | 457 | new_state = SCTP_CONNTRACK_MAX; |
9fb9cbb1 YK |
458 | for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) { |
459 | /* Don't need lock here: this conntrack not in circulation yet */ | |
efe9f68a PM |
460 | new_state = sctp_new_state(IP_CT_DIR_ORIGINAL, |
461 | SCTP_CONNTRACK_NONE, sch->type); | |
9fb9cbb1 YK |
462 | |
463 | /* Invalid: delete conntrack */ | |
efe9f68a PM |
464 | if (new_state == SCTP_CONNTRACK_NONE || |
465 | new_state == SCTP_CONNTRACK_MAX) { | |
0d53778e | 466 | pr_debug("nf_conntrack_sctp: invalid new deleting.\n"); |
09f263cd | 467 | return false; |
9fb9cbb1 YK |
468 | } |
469 | ||
470 | /* Copy the vtag into the state info */ | |
471 | if (sch->type == SCTP_CID_INIT) { | |
472 | if (sh->vtag == 0) { | |
473 | sctp_inithdr_t _inithdr, *ih; | |
474 | ||
475 | ih = skb_header_pointer(skb, offset + sizeof(sctp_chunkhdr_t), | |
601e68e1 | 476 | sizeof(_inithdr), &_inithdr); |
9fb9cbb1 | 477 | if (ih == NULL) |
09f263cd | 478 | return false; |
9fb9cbb1 | 479 | |
0d53778e PM |
480 | pr_debug("Setting vtag %x for new conn\n", |
481 | ih->init_tag); | |
9fb9cbb1 | 482 | |
112f35c9 | 483 | ct->proto.sctp.vtag[IP_CT_DIR_REPLY] = |
9fb9cbb1 YK |
484 | ih->init_tag; |
485 | } else { | |
486 | /* Sec 8.5.1 (A) */ | |
09f263cd | 487 | return false; |
9fb9cbb1 | 488 | } |
d7ee3519 MK |
489 | } else if (sch->type == SCTP_CID_HEARTBEAT) { |
490 | pr_debug("Setting vtag %x for secondary conntrack\n", | |
491 | sh->vtag); | |
492 | ct->proto.sctp.vtag[IP_CT_DIR_ORIGINAL] = sh->vtag; | |
9fb9cbb1 YK |
493 | } |
494 | /* If it is a shutdown ack OOTB packet, we expect a return | |
495 | shutdown complete, otherwise an ABORT Sec 8.4 (5) and (8) */ | |
496 | else { | |
0d53778e PM |
497 | pr_debug("Setting vtag %x for new conn OOTB\n", |
498 | sh->vtag); | |
112f35c9 | 499 | ct->proto.sctp.vtag[IP_CT_DIR_REPLY] = sh->vtag; |
9fb9cbb1 YK |
500 | } |
501 | ||
efe9f68a | 502 | ct->proto.sctp.state = new_state; |
9fb9cbb1 YK |
503 | } |
504 | ||
09f263cd | 505 | return true; |
9fb9cbb1 YK |
506 | } |
507 | ||
c0cd1156 | 508 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK) |
a258860e PNA |
509 | |
510 | #include <linux/netfilter/nfnetlink.h> | |
511 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
512 | ||
513 | static int sctp_to_nlattr(struct sk_buff *skb, struct nlattr *nla, | |
440f0d58 | 514 | struct nf_conn *ct) |
a258860e PNA |
515 | { |
516 | struct nlattr *nest_parms; | |
517 | ||
440f0d58 | 518 | spin_lock_bh(&ct->lock); |
a258860e PNA |
519 | nest_parms = nla_nest_start(skb, CTA_PROTOINFO_SCTP | NLA_F_NESTED); |
520 | if (!nest_parms) | |
521 | goto nla_put_failure; | |
522 | ||
5e8d1eb5 DM |
523 | if (nla_put_u8(skb, CTA_PROTOINFO_SCTP_STATE, ct->proto.sctp.state) || |
524 | nla_put_be32(skb, CTA_PROTOINFO_SCTP_VTAG_ORIGINAL, | |
525 | ct->proto.sctp.vtag[IP_CT_DIR_ORIGINAL]) || | |
526 | nla_put_be32(skb, CTA_PROTOINFO_SCTP_VTAG_REPLY, | |
527 | ct->proto.sctp.vtag[IP_CT_DIR_REPLY])) | |
528 | goto nla_put_failure; | |
a258860e | 529 | |
440f0d58 | 530 | spin_unlock_bh(&ct->lock); |
a258860e PNA |
531 | |
532 | nla_nest_end(skb, nest_parms); | |
533 | ||
534 | return 0; | |
535 | ||
536 | nla_put_failure: | |
440f0d58 | 537 | spin_unlock_bh(&ct->lock); |
a258860e PNA |
538 | return -1; |
539 | } | |
540 | ||
541 | static const struct nla_policy sctp_nla_policy[CTA_PROTOINFO_SCTP_MAX+1] = { | |
542 | [CTA_PROTOINFO_SCTP_STATE] = { .type = NLA_U8 }, | |
543 | [CTA_PROTOINFO_SCTP_VTAG_ORIGINAL] = { .type = NLA_U32 }, | |
544 | [CTA_PROTOINFO_SCTP_VTAG_REPLY] = { .type = NLA_U32 }, | |
545 | }; | |
546 | ||
547 | static int nlattr_to_sctp(struct nlattr *cda[], struct nf_conn *ct) | |
548 | { | |
549 | struct nlattr *attr = cda[CTA_PROTOINFO_SCTP]; | |
550 | struct nlattr *tb[CTA_PROTOINFO_SCTP_MAX+1]; | |
551 | int err; | |
552 | ||
553 | /* updates may not contain the internal protocol info, skip parsing */ | |
554 | if (!attr) | |
555 | return 0; | |
556 | ||
557 | err = nla_parse_nested(tb, | |
558 | CTA_PROTOINFO_SCTP_MAX, | |
559 | attr, | |
560 | sctp_nla_policy); | |
561 | if (err < 0) | |
562 | return err; | |
563 | ||
564 | if (!tb[CTA_PROTOINFO_SCTP_STATE] || | |
565 | !tb[CTA_PROTOINFO_SCTP_VTAG_ORIGINAL] || | |
566 | !tb[CTA_PROTOINFO_SCTP_VTAG_REPLY]) | |
567 | return -EINVAL; | |
568 | ||
440f0d58 | 569 | spin_lock_bh(&ct->lock); |
a258860e PNA |
570 | ct->proto.sctp.state = nla_get_u8(tb[CTA_PROTOINFO_SCTP_STATE]); |
571 | ct->proto.sctp.vtag[IP_CT_DIR_ORIGINAL] = | |
5547cd0a | 572 | nla_get_be32(tb[CTA_PROTOINFO_SCTP_VTAG_ORIGINAL]); |
a258860e | 573 | ct->proto.sctp.vtag[IP_CT_DIR_REPLY] = |
5547cd0a | 574 | nla_get_be32(tb[CTA_PROTOINFO_SCTP_VTAG_REPLY]); |
440f0d58 | 575 | spin_unlock_bh(&ct->lock); |
a258860e PNA |
576 | |
577 | return 0; | |
578 | } | |
a400c30e HE |
579 | |
580 | static int sctp_nlattr_size(void) | |
581 | { | |
582 | return nla_total_size(0) /* CTA_PROTOINFO_SCTP */ | |
583 | + nla_policy_len(sctp_nla_policy, CTA_PROTOINFO_SCTP_MAX + 1); | |
584 | } | |
a258860e PNA |
585 | #endif |
586 | ||
50978462 PNA |
587 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) |
588 | ||
589 | #include <linux/netfilter/nfnetlink.h> | |
590 | #include <linux/netfilter/nfnetlink_cttimeout.h> | |
591 | ||
8264deb8 G |
592 | static int sctp_timeout_nlattr_to_obj(struct nlattr *tb[], |
593 | struct net *net, void *data) | |
50978462 PNA |
594 | { |
595 | unsigned int *timeouts = data; | |
a85406af | 596 | struct nf_sctp_net *sn = sctp_pernet(net); |
50978462 PNA |
597 | int i; |
598 | ||
599 | /* set default SCTP timeouts. */ | |
600 | for (i=0; i<SCTP_CONNTRACK_MAX; i++) | |
8264deb8 | 601 | timeouts[i] = sn->timeouts[i]; |
50978462 PNA |
602 | |
603 | /* there's a 1:1 mapping between attributes and protocol states. */ | |
604 | for (i=CTA_TIMEOUT_SCTP_UNSPEC+1; i<CTA_TIMEOUT_SCTP_MAX+1; i++) { | |
605 | if (tb[i]) { | |
606 | timeouts[i] = ntohl(nla_get_be32(tb[i])) * HZ; | |
607 | } | |
608 | } | |
609 | return 0; | |
610 | } | |
611 | ||
612 | static int | |
613 | sctp_timeout_obj_to_nlattr(struct sk_buff *skb, const void *data) | |
614 | { | |
615 | const unsigned int *timeouts = data; | |
616 | int i; | |
617 | ||
5e8d1eb5 DM |
618 | for (i=CTA_TIMEOUT_SCTP_UNSPEC+1; i<CTA_TIMEOUT_SCTP_MAX+1; i++) { |
619 | if (nla_put_be32(skb, i, htonl(timeouts[i] / HZ))) | |
620 | goto nla_put_failure; | |
621 | } | |
50978462 PNA |
622 | return 0; |
623 | ||
624 | nla_put_failure: | |
625 | return -ENOSPC; | |
626 | } | |
627 | ||
628 | static const struct nla_policy | |
629 | sctp_timeout_nla_policy[CTA_TIMEOUT_SCTP_MAX+1] = { | |
630 | [CTA_TIMEOUT_SCTP_CLOSED] = { .type = NLA_U32 }, | |
631 | [CTA_TIMEOUT_SCTP_COOKIE_WAIT] = { .type = NLA_U32 }, | |
632 | [CTA_TIMEOUT_SCTP_COOKIE_ECHOED] = { .type = NLA_U32 }, | |
633 | [CTA_TIMEOUT_SCTP_ESTABLISHED] = { .type = NLA_U32 }, | |
634 | [CTA_TIMEOUT_SCTP_SHUTDOWN_SENT] = { .type = NLA_U32 }, | |
635 | [CTA_TIMEOUT_SCTP_SHUTDOWN_RECD] = { .type = NLA_U32 }, | |
636 | [CTA_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = { .type = NLA_U32 }, | |
d7ee3519 MK |
637 | [CTA_TIMEOUT_SCTP_HEARTBEAT_SENT] = { .type = NLA_U32 }, |
638 | [CTA_TIMEOUT_SCTP_HEARTBEAT_ACKED] = { .type = NLA_U32 }, | |
50978462 PNA |
639 | }; |
640 | #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ | |
641 | ||
642 | ||
9fb9cbb1 | 643 | #ifdef CONFIG_SYSCTL |
933a41e7 | 644 | static struct ctl_table sctp_sysctl_table[] = { |
9fb9cbb1 | 645 | { |
9fb9cbb1 | 646 | .procname = "nf_conntrack_sctp_timeout_closed", |
9fb9cbb1 YK |
647 | .maxlen = sizeof(unsigned int), |
648 | .mode = 0644, | |
6d9f239a | 649 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
650 | }, |
651 | { | |
9fb9cbb1 | 652 | .procname = "nf_conntrack_sctp_timeout_cookie_wait", |
9fb9cbb1 YK |
653 | .maxlen = sizeof(unsigned int), |
654 | .mode = 0644, | |
6d9f239a | 655 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
656 | }, |
657 | { | |
9fb9cbb1 | 658 | .procname = "nf_conntrack_sctp_timeout_cookie_echoed", |
9fb9cbb1 YK |
659 | .maxlen = sizeof(unsigned int), |
660 | .mode = 0644, | |
6d9f239a | 661 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
662 | }, |
663 | { | |
9fb9cbb1 | 664 | .procname = "nf_conntrack_sctp_timeout_established", |
9fb9cbb1 YK |
665 | .maxlen = sizeof(unsigned int), |
666 | .mode = 0644, | |
6d9f239a | 667 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
668 | }, |
669 | { | |
9fb9cbb1 | 670 | .procname = "nf_conntrack_sctp_timeout_shutdown_sent", |
9fb9cbb1 YK |
671 | .maxlen = sizeof(unsigned int), |
672 | .mode = 0644, | |
6d9f239a | 673 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
674 | }, |
675 | { | |
9fb9cbb1 | 676 | .procname = "nf_conntrack_sctp_timeout_shutdown_recd", |
9fb9cbb1 YK |
677 | .maxlen = sizeof(unsigned int), |
678 | .mode = 0644, | |
6d9f239a | 679 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
680 | }, |
681 | { | |
9fb9cbb1 | 682 | .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent", |
9fb9cbb1 YK |
683 | .maxlen = sizeof(unsigned int), |
684 | .mode = 0644, | |
6d9f239a | 685 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 | 686 | }, |
d7ee3519 MK |
687 | { |
688 | .procname = "nf_conntrack_sctp_timeout_heartbeat_sent", | |
689 | .maxlen = sizeof(unsigned int), | |
690 | .mode = 0644, | |
691 | .proc_handler = proc_dointvec_jiffies, | |
692 | }, | |
693 | { | |
694 | .procname = "nf_conntrack_sctp_timeout_heartbeat_acked", | |
695 | .maxlen = sizeof(unsigned int), | |
696 | .mode = 0644, | |
697 | .proc_handler = proc_dointvec_jiffies, | |
698 | }, | |
f8572d8f | 699 | { } |
9fb9cbb1 | 700 | }; |
933a41e7 | 701 | #endif |
9fb9cbb1 | 702 | |
f42c4183 | 703 | static int sctp_kmemdup_sysctl_table(struct nf_proto_net *pn, |
a85406af | 704 | struct nf_sctp_net *sn) |
49d485a3 G |
705 | { |
706 | #ifdef CONFIG_SYSCTL | |
49d485a3 G |
707 | if (pn->ctl_table) |
708 | return 0; | |
709 | ||
710 | pn->ctl_table = kmemdup(sctp_sysctl_table, | |
711 | sizeof(sctp_sysctl_table), | |
712 | GFP_KERNEL); | |
713 | if (!pn->ctl_table) | |
714 | return -ENOMEM; | |
715 | ||
716 | pn->ctl_table[0].data = &sn->timeouts[SCTP_CONNTRACK_CLOSED]; | |
717 | pn->ctl_table[1].data = &sn->timeouts[SCTP_CONNTRACK_COOKIE_WAIT]; | |
718 | pn->ctl_table[2].data = &sn->timeouts[SCTP_CONNTRACK_COOKIE_ECHOED]; | |
719 | pn->ctl_table[3].data = &sn->timeouts[SCTP_CONNTRACK_ESTABLISHED]; | |
720 | pn->ctl_table[4].data = &sn->timeouts[SCTP_CONNTRACK_SHUTDOWN_SENT]; | |
721 | pn->ctl_table[5].data = &sn->timeouts[SCTP_CONNTRACK_SHUTDOWN_RECD]; | |
722 | pn->ctl_table[6].data = &sn->timeouts[SCTP_CONNTRACK_SHUTDOWN_ACK_SENT]; | |
d7ee3519 MK |
723 | pn->ctl_table[7].data = &sn->timeouts[SCTP_CONNTRACK_HEARTBEAT_SENT]; |
724 | pn->ctl_table[8].data = &sn->timeouts[SCTP_CONNTRACK_HEARTBEAT_ACKED]; | |
49d485a3 G |
725 | #endif |
726 | return 0; | |
727 | } | |
728 | ||
f42c4183 | 729 | static int sctp_init_net(struct net *net, u_int16_t proto) |
49d485a3 | 730 | { |
a85406af | 731 | struct nf_sctp_net *sn = sctp_pernet(net); |
f42c4183 | 732 | struct nf_proto_net *pn = &sn->pn; |
49d485a3 | 733 | |
f42c4183 G |
734 | if (!pn->users) { |
735 | int i; | |
49d485a3 | 736 | |
f42c4183 G |
737 | for (i = 0; i < SCTP_CONNTRACK_MAX; i++) |
738 | sn->timeouts[i] = sctp_timeouts[i]; | |
739 | } | |
49d485a3 | 740 | |
adf05168 | 741 | return sctp_kmemdup_sysctl_table(pn, sn); |
49d485a3 G |
742 | } |
743 | ||
a85406af | 744 | struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp4 __read_mostly = { |
933a41e7 PM |
745 | .l3proto = PF_INET, |
746 | .l4proto = IPPROTO_SCTP, | |
747 | .name = "sctp", | |
748 | .pkt_to_tuple = sctp_pkt_to_tuple, | |
749 | .invert_tuple = sctp_invert_tuple, | |
750 | .print_tuple = sctp_print_tuple, | |
751 | .print_conntrack = sctp_print_conntrack, | |
752 | .packet = sctp_packet, | |
2c8503f5 | 753 | .get_timeouts = sctp_get_timeouts, |
933a41e7 PM |
754 | .new = sctp_new, |
755 | .me = THIS_MODULE, | |
c0cd1156 | 756 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK) |
a258860e | 757 | .to_nlattr = sctp_to_nlattr, |
a400c30e | 758 | .nlattr_size = sctp_nlattr_size, |
a258860e | 759 | .from_nlattr = nlattr_to_sctp, |
c7212e9d | 760 | .tuple_to_nlattr = nf_ct_port_tuple_to_nlattr, |
a400c30e | 761 | .nlattr_tuple_size = nf_ct_port_nlattr_tuple_size, |
c7212e9d PNA |
762 | .nlattr_to_tuple = nf_ct_port_nlattr_to_tuple, |
763 | .nla_policy = nf_ct_port_nla_policy, | |
764 | #endif | |
50978462 PNA |
765 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) |
766 | .ctnl_timeout = { | |
767 | .nlattr_to_obj = sctp_timeout_nlattr_to_obj, | |
768 | .obj_to_nlattr = sctp_timeout_obj_to_nlattr, | |
769 | .nlattr_max = CTA_TIMEOUT_SCTP_MAX, | |
770 | .obj_size = sizeof(unsigned int) * SCTP_CONNTRACK_MAX, | |
771 | .nla_policy = sctp_timeout_nla_policy, | |
772 | }, | |
773 | #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ | |
f42c4183 | 774 | .init_net = sctp_init_net, |
9fb9cbb1 | 775 | }; |
a85406af | 776 | EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_sctp4); |
9fb9cbb1 | 777 | |
a85406af | 778 | struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp6 __read_mostly = { |
933a41e7 PM |
779 | .l3proto = PF_INET6, |
780 | .l4proto = IPPROTO_SCTP, | |
781 | .name = "sctp", | |
782 | .pkt_to_tuple = sctp_pkt_to_tuple, | |
783 | .invert_tuple = sctp_invert_tuple, | |
784 | .print_tuple = sctp_print_tuple, | |
785 | .print_conntrack = sctp_print_conntrack, | |
786 | .packet = sctp_packet, | |
2c8503f5 | 787 | .get_timeouts = sctp_get_timeouts, |
933a41e7 PM |
788 | .new = sctp_new, |
789 | .me = THIS_MODULE, | |
c0cd1156 | 790 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK) |
a258860e | 791 | .to_nlattr = sctp_to_nlattr, |
a400c30e | 792 | .nlattr_size = sctp_nlattr_size, |
a258860e | 793 | .from_nlattr = nlattr_to_sctp, |
c7212e9d | 794 | .tuple_to_nlattr = nf_ct_port_tuple_to_nlattr, |
a400c30e | 795 | .nlattr_tuple_size = nf_ct_port_nlattr_tuple_size, |
c7212e9d PNA |
796 | .nlattr_to_tuple = nf_ct_port_nlattr_to_tuple, |
797 | .nla_policy = nf_ct_port_nla_policy, | |
50978462 PNA |
798 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) |
799 | .ctnl_timeout = { | |
800 | .nlattr_to_obj = sctp_timeout_nlattr_to_obj, | |
801 | .obj_to_nlattr = sctp_timeout_obj_to_nlattr, | |
802 | .nlattr_max = CTA_TIMEOUT_SCTP_MAX, | |
803 | .obj_size = sizeof(unsigned int) * SCTP_CONNTRACK_MAX, | |
804 | .nla_policy = sctp_timeout_nla_policy, | |
805 | }, | |
806 | #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ | |
9fb9cbb1 | 807 | #endif |
f42c4183 | 808 | .init_net = sctp_init_net, |
933a41e7 | 809 | }; |
a85406af | 810 | EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_sctp6); |