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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> | |
cf6e007e | 25 | #include <net/sctp/checksum.h> |
9fb9cbb1 | 26 | |
cf6e007e | 27 | #include <net/netfilter/nf_log.h> |
9fb9cbb1 | 28 | #include <net/netfilter/nf_conntrack.h> |
605dcad6 | 29 | #include <net/netfilter/nf_conntrack_l4proto.h> |
f6180121 | 30 | #include <net/netfilter/nf_conntrack_ecache.h> |
9fb9cbb1 | 31 | |
9fb9cbb1 | 32 | /* FIXME: Examine ipfilter's timeouts and conntrack transitions more |
601e68e1 | 33 | closely. They're more complex. --RR |
9fb9cbb1 YK |
34 | |
35 | And so for me for SCTP :D -Kiran */ | |
36 | ||
12c33aa2 | 37 | static const char *const sctp_conntrack_names[] = { |
9fb9cbb1 YK |
38 | "NONE", |
39 | "CLOSED", | |
40 | "COOKIE_WAIT", | |
41 | "COOKIE_ECHOED", | |
42 | "ESTABLISHED", | |
43 | "SHUTDOWN_SENT", | |
44 | "SHUTDOWN_RECD", | |
45 | "SHUTDOWN_ACK_SENT", | |
d7ee3519 MK |
46 | "HEARTBEAT_SENT", |
47 | "HEARTBEAT_ACKED", | |
9fb9cbb1 YK |
48 | }; |
49 | ||
50 | #define SECS * HZ | |
51 | #define MINS * 60 SECS | |
52 | #define HOURS * 60 MINS | |
53 | #define DAYS * 24 HOURS | |
54 | ||
86c0bf40 PM |
55 | static unsigned int sctp_timeouts[SCTP_CONNTRACK_MAX] __read_mostly = { |
56 | [SCTP_CONNTRACK_CLOSED] = 10 SECS, | |
57 | [SCTP_CONNTRACK_COOKIE_WAIT] = 3 SECS, | |
58 | [SCTP_CONNTRACK_COOKIE_ECHOED] = 3 SECS, | |
59 | [SCTP_CONNTRACK_ESTABLISHED] = 5 DAYS, | |
60 | [SCTP_CONNTRACK_SHUTDOWN_SENT] = 300 SECS / 1000, | |
61 | [SCTP_CONNTRACK_SHUTDOWN_RECD] = 300 SECS / 1000, | |
62 | [SCTP_CONNTRACK_SHUTDOWN_ACK_SENT] = 3 SECS, | |
d7ee3519 MK |
63 | [SCTP_CONNTRACK_HEARTBEAT_SENT] = 30 SECS, |
64 | [SCTP_CONNTRACK_HEARTBEAT_ACKED] = 210 SECS, | |
86c0bf40 | 65 | }; |
9fb9cbb1 YK |
66 | |
67 | #define sNO SCTP_CONNTRACK_NONE | |
68 | #define sCL SCTP_CONNTRACK_CLOSED | |
69 | #define sCW SCTP_CONNTRACK_COOKIE_WAIT | |
70 | #define sCE SCTP_CONNTRACK_COOKIE_ECHOED | |
71 | #define sES SCTP_CONNTRACK_ESTABLISHED | |
72 | #define sSS SCTP_CONNTRACK_SHUTDOWN_SENT | |
73 | #define sSR SCTP_CONNTRACK_SHUTDOWN_RECD | |
74 | #define sSA SCTP_CONNTRACK_SHUTDOWN_ACK_SENT | |
d7ee3519 MK |
75 | #define sHS SCTP_CONNTRACK_HEARTBEAT_SENT |
76 | #define sHA SCTP_CONNTRACK_HEARTBEAT_ACKED | |
9fb9cbb1 YK |
77 | #define sIV SCTP_CONNTRACK_MAX |
78 | ||
601e68e1 | 79 | /* |
9fb9cbb1 YK |
80 | These are the descriptions of the states: |
81 | ||
601e68e1 | 82 | NOTE: These state names are tantalizingly similar to the states of an |
9fb9cbb1 | 83 | SCTP endpoint. But the interpretation of the states is a little different, |
601e68e1 | 84 | considering that these are the states of the connection and not of an end |
9fb9cbb1 YK |
85 | point. Please note the subtleties. -Kiran |
86 | ||
87 | NONE - Nothing so far. | |
601e68e1 YH |
88 | COOKIE WAIT - We have seen an INIT chunk in the original direction, or also |
89 | an INIT_ACK chunk in the reply direction. | |
9fb9cbb1 YK |
90 | COOKIE ECHOED - We have seen a COOKIE_ECHO chunk in the original direction. |
91 | ESTABLISHED - We have seen a COOKIE_ACK in the reply direction. | |
92 | SHUTDOWN_SENT - We have seen a SHUTDOWN chunk in the original direction. | |
93 | SHUTDOWN_RECD - We have seen a SHUTDOWN chunk in the reply directoin. | |
94 | SHUTDOWN_ACK_SENT - We have seen a SHUTDOWN_ACK chunk in the direction opposite | |
601e68e1 YH |
95 | to that of the SHUTDOWN chunk. |
96 | CLOSED - We have seen a SHUTDOWN_COMPLETE chunk in the direction of | |
97 | the SHUTDOWN chunk. Connection is closed. | |
d7ee3519 MK |
98 | HEARTBEAT_SENT - We have seen a HEARTBEAT in a new flow. |
99 | HEARTBEAT_ACKED - We have seen a HEARTBEAT-ACK in the direction opposite to | |
100 | that of the HEARTBEAT chunk. Secondary connection is | |
101 | established. | |
9fb9cbb1 YK |
102 | */ |
103 | ||
104 | /* TODO | |
601e68e1 | 105 | - I have assumed that the first INIT is in the original direction. |
9fb9cbb1 YK |
106 | This messes things when an INIT comes in the reply direction in CLOSED |
107 | state. | |
601e68e1 | 108 | - Check the error type in the reply dir before transitioning from |
9fb9cbb1 YK |
109 | cookie echoed to closed. |
110 | - Sec 5.2.4 of RFC 2960 | |
d7ee3519 | 111 | - Full Multi Homing support. |
9fb9cbb1 YK |
112 | */ |
113 | ||
114 | /* SCTP conntrack state transitions */ | |
d7ee3519 | 115 | static const u8 sctp_conntracks[2][11][SCTP_CONNTRACK_MAX] = { |
9fb9cbb1 YK |
116 | { |
117 | /* ORIGINAL */ | |
d7ee3519 MK |
118 | /* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA, sHS, sHA */ |
119 | /* init */ {sCW, sCW, sCW, sCE, sES, sSS, sSR, sSA, sCW, sHA}, | |
120 | /* init_ack */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA, sCL, sHA}, | |
121 | /* abort */ {sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL}, | |
122 | /* shutdown */ {sCL, sCL, sCW, sCE, sSS, sSS, sSR, sSA, sCL, sSS}, | |
123 | /* shutdown_ack */ {sSA, sCL, sCW, sCE, sES, sSA, sSA, sSA, sSA, sHA}, | |
124 | /* error */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA, sCL, sHA},/* Can't have Stale cookie*/ | |
125 | /* cookie_echo */ {sCL, sCL, sCE, sCE, sES, sSS, sSR, sSA, sCL, sHA},/* 5.2.4 - Big TODO */ | |
126 | /* cookie_ack */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA, sCL, sHA},/* Can't come in orig dir */ | |
127 | /* shutdown_comp*/ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sCL, sCL, sHA}, | |
128 | /* heartbeat */ {sHS, sCL, sCW, sCE, sES, sSS, sSR, sSA, sHS, sHA}, | |
129 | /* heartbeat_ack*/ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA, sHS, sHA} | |
9fb9cbb1 YK |
130 | }, |
131 | { | |
132 | /* REPLY */ | |
d7ee3519 MK |
133 | /* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA, sHS, sHA */ |
134 | /* init */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA, sIV, sHA},/* INIT in sCL Big TODO */ | |
135 | /* init_ack */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA, sIV, sHA}, | |
136 | /* abort */ {sIV, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sIV, sCL}, | |
137 | /* shutdown */ {sIV, sCL, sCW, sCE, sSR, sSS, sSR, sSA, sIV, sSR}, | |
138 | /* shutdown_ack */ {sIV, sCL, sCW, sCE, sES, sSA, sSA, sSA, sIV, sHA}, | |
139 | /* error */ {sIV, sCL, sCW, sCL, sES, sSS, sSR, sSA, sIV, sHA}, | |
140 | /* cookie_echo */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA, sIV, sHA},/* Can't come in reply dir */ | |
141 | /* cookie_ack */ {sIV, sCL, sCW, sES, sES, sSS, sSR, sSA, sIV, sHA}, | |
142 | /* shutdown_comp*/ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sCL, sIV, sHA}, | |
143 | /* heartbeat */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA, sHS, sHA}, | |
144 | /* heartbeat_ack*/ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA, sHA, sHA} | |
9fb9cbb1 YK |
145 | } |
146 | }; | |
147 | ||
a85406af | 148 | static inline struct nf_sctp_net *sctp_pernet(struct net *net) |
49d485a3 | 149 | { |
a85406af | 150 | return &net->ct.nf_ct_proto.sctp; |
49d485a3 G |
151 | } |
152 | ||
09f263cd | 153 | static bool sctp_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff, |
a31f1adc | 154 | struct net *net, struct nf_conntrack_tuple *tuple) |
9fb9cbb1 | 155 | { |
12c33aa2 JE |
156 | const struct sctphdr *hp; |
157 | struct sctphdr _hdr; | |
9fb9cbb1 | 158 | |
e5e693ab GF |
159 | /* Actually only need first 4 bytes to get ports. */ |
160 | hp = skb_header_pointer(skb, dataoff, 4, &_hdr); | |
9fb9cbb1 | 161 | if (hp == NULL) |
09f263cd | 162 | return false; |
9fb9cbb1 YK |
163 | |
164 | tuple->src.u.sctp.port = hp->source; | |
165 | tuple->dst.u.sctp.port = hp->dest; | |
09f263cd | 166 | return true; |
9fb9cbb1 YK |
167 | } |
168 | ||
09f263cd JE |
169 | static bool sctp_invert_tuple(struct nf_conntrack_tuple *tuple, |
170 | const struct nf_conntrack_tuple *orig) | |
9fb9cbb1 | 171 | { |
9fb9cbb1 YK |
172 | tuple->src.u.sctp.port = orig->dst.u.sctp.port; |
173 | tuple->dst.u.sctp.port = orig->src.u.sctp.port; | |
09f263cd | 174 | return true; |
9fb9cbb1 YK |
175 | } |
176 | ||
ea48cc83 | 177 | #ifdef CONFIG_NF_CONNTRACK_PROCFS |
9fb9cbb1 | 178 | /* Print out the private part of the conntrack. */ |
37246a58 | 179 | static void sctp_print_conntrack(struct seq_file *s, struct nf_conn *ct) |
9fb9cbb1 | 180 | { |
a163f2cb | 181 | seq_printf(s, "%s ", sctp_conntrack_names[ct->proto.sctp.state]); |
9fb9cbb1 | 182 | } |
ea48cc83 | 183 | #endif |
9fb9cbb1 YK |
184 | |
185 | #define for_each_sctp_chunk(skb, sch, _sch, offset, dataoff, count) \ | |
ae146d9b | 186 | for ((offset) = (dataoff) + sizeof(struct sctphdr), (count) = 0; \ |
e79ec50b JE |
187 | (offset) < (skb)->len && \ |
188 | ((sch) = skb_header_pointer((skb), (offset), sizeof(_sch), &(_sch))); \ | |
189 | (offset) += (ntohs((sch)->length) + 3) & ~3, (count)++) | |
9fb9cbb1 YK |
190 | |
191 | /* Some validity checks to make sure the chunks are fine */ | |
112f35c9 | 192 | static int do_basic_checks(struct nf_conn *ct, |
9fb9cbb1 YK |
193 | const struct sk_buff *skb, |
194 | unsigned int dataoff, | |
35c6d3cb | 195 | unsigned long *map) |
9fb9cbb1 YK |
196 | { |
197 | u_int32_t offset, count; | |
922dbc5b | 198 | struct sctp_chunkhdr _sch, *sch; |
9fb9cbb1 YK |
199 | int flag; |
200 | ||
9fb9cbb1 YK |
201 | flag = 0; |
202 | ||
203 | for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) { | |
0d53778e | 204 | pr_debug("Chunk Num: %d Type: %d\n", count, sch->type); |
9fb9cbb1 | 205 | |
5447d477 PM |
206 | if (sch->type == SCTP_CID_INIT || |
207 | sch->type == SCTP_CID_INIT_ACK || | |
208 | sch->type == SCTP_CID_SHUTDOWN_COMPLETE) | |
9fb9cbb1 | 209 | flag = 1; |
9fb9cbb1 | 210 | |
e17df688 PM |
211 | /* |
212 | * Cookie Ack/Echo chunks not the first OR | |
213 | * Init / Init Ack / Shutdown compl chunks not the only chunks | |
214 | * OR zero-length. | |
215 | */ | |
5447d477 PM |
216 | if (((sch->type == SCTP_CID_COOKIE_ACK || |
217 | sch->type == SCTP_CID_COOKIE_ECHO || | |
218 | flag) && | |
219 | count != 0) || !sch->length) { | |
0d53778e | 220 | pr_debug("Basic checks failed\n"); |
9fb9cbb1 YK |
221 | return 1; |
222 | } | |
223 | ||
5447d477 | 224 | if (map) |
35c6d3cb | 225 | set_bit(sch->type, map); |
9fb9cbb1 YK |
226 | } |
227 | ||
0d53778e | 228 | pr_debug("Basic checks passed\n"); |
dd7271fe | 229 | return count == 0; |
9fb9cbb1 YK |
230 | } |
231 | ||
efe9f68a PM |
232 | static int sctp_new_state(enum ip_conntrack_dir dir, |
233 | enum sctp_conntrack cur_state, | |
234 | int chunk_type) | |
9fb9cbb1 YK |
235 | { |
236 | int i; | |
237 | ||
0d53778e | 238 | pr_debug("Chunk type: %d\n", chunk_type); |
9fb9cbb1 YK |
239 | |
240 | switch (chunk_type) { | |
5447d477 PM |
241 | case SCTP_CID_INIT: |
242 | pr_debug("SCTP_CID_INIT\n"); | |
243 | i = 0; | |
244 | break; | |
245 | case SCTP_CID_INIT_ACK: | |
246 | pr_debug("SCTP_CID_INIT_ACK\n"); | |
247 | i = 1; | |
248 | break; | |
249 | case SCTP_CID_ABORT: | |
250 | pr_debug("SCTP_CID_ABORT\n"); | |
251 | i = 2; | |
252 | break; | |
253 | case SCTP_CID_SHUTDOWN: | |
254 | pr_debug("SCTP_CID_SHUTDOWN\n"); | |
255 | i = 3; | |
256 | break; | |
257 | case SCTP_CID_SHUTDOWN_ACK: | |
258 | pr_debug("SCTP_CID_SHUTDOWN_ACK\n"); | |
259 | i = 4; | |
260 | break; | |
261 | case SCTP_CID_ERROR: | |
262 | pr_debug("SCTP_CID_ERROR\n"); | |
263 | i = 5; | |
264 | break; | |
265 | case SCTP_CID_COOKIE_ECHO: | |
266 | pr_debug("SCTP_CID_COOKIE_ECHO\n"); | |
267 | i = 6; | |
268 | break; | |
269 | case SCTP_CID_COOKIE_ACK: | |
270 | pr_debug("SCTP_CID_COOKIE_ACK\n"); | |
271 | i = 7; | |
272 | break; | |
273 | case SCTP_CID_SHUTDOWN_COMPLETE: | |
274 | pr_debug("SCTP_CID_SHUTDOWN_COMPLETE\n"); | |
275 | i = 8; | |
276 | break; | |
d7ee3519 MK |
277 | case SCTP_CID_HEARTBEAT: |
278 | pr_debug("SCTP_CID_HEARTBEAT"); | |
279 | i = 9; | |
280 | break; | |
281 | case SCTP_CID_HEARTBEAT_ACK: | |
282 | pr_debug("SCTP_CID_HEARTBEAT_ACK"); | |
283 | i = 10; | |
284 | break; | |
5447d477 | 285 | default: |
d7ee3519 | 286 | /* Other chunks like DATA or SACK do not change the state */ |
5447d477 PM |
287 | pr_debug("Unknown chunk type, Will stay in %s\n", |
288 | sctp_conntrack_names[cur_state]); | |
289 | return cur_state; | |
9fb9cbb1 YK |
290 | } |
291 | ||
0d53778e PM |
292 | pr_debug("dir: %d cur_state: %s chunk_type: %d new_state: %s\n", |
293 | dir, sctp_conntrack_names[cur_state], chunk_type, | |
294 | sctp_conntrack_names[sctp_conntracks[dir][i][cur_state]]); | |
9fb9cbb1 YK |
295 | |
296 | return sctp_conntracks[dir][i][cur_state]; | |
297 | } | |
298 | ||
2c8503f5 PNA |
299 | static unsigned int *sctp_get_timeouts(struct net *net) |
300 | { | |
49d485a3 | 301 | return sctp_pernet(net)->timeouts; |
2c8503f5 PNA |
302 | } |
303 | ||
b37e933a | 304 | /* Returns verdict for packet, or -NF_ACCEPT for invalid. */ |
112f35c9 | 305 | static int sctp_packet(struct nf_conn *ct, |
9fb9cbb1 YK |
306 | const struct sk_buff *skb, |
307 | unsigned int dataoff, | |
308 | enum ip_conntrack_info ctinfo, | |
2c8503f5 | 309 | unsigned int *timeouts) |
9fb9cbb1 | 310 | { |
efe9f68a | 311 | enum sctp_conntrack new_state, old_state; |
8528819a | 312 | enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo); |
12c33aa2 JE |
313 | const struct sctphdr *sh; |
314 | struct sctphdr _sctph; | |
315 | const struct sctp_chunkhdr *sch; | |
316 | struct sctp_chunkhdr _sch; | |
9fb9cbb1 | 317 | u_int32_t offset, count; |
35c6d3cb | 318 | unsigned long map[256 / sizeof(unsigned long)] = { 0 }; |
9fb9cbb1 | 319 | |
9fb9cbb1 YK |
320 | sh = skb_header_pointer(skb, dataoff, sizeof(_sctph), &_sctph); |
321 | if (sh == NULL) | |
b37e933a | 322 | goto out; |
9fb9cbb1 | 323 | |
112f35c9 | 324 | if (do_basic_checks(ct, skb, dataoff, map) != 0) |
b37e933a | 325 | goto out; |
9fb9cbb1 YK |
326 | |
327 | /* Check the verification tag (Sec 8.5) */ | |
35c6d3cb PM |
328 | if (!test_bit(SCTP_CID_INIT, map) && |
329 | !test_bit(SCTP_CID_SHUTDOWN_COMPLETE, map) && | |
330 | !test_bit(SCTP_CID_COOKIE_ECHO, map) && | |
331 | !test_bit(SCTP_CID_ABORT, map) && | |
332 | !test_bit(SCTP_CID_SHUTDOWN_ACK, map) && | |
d7ee3519 MK |
333 | !test_bit(SCTP_CID_HEARTBEAT, map) && |
334 | !test_bit(SCTP_CID_HEARTBEAT_ACK, map) && | |
8528819a | 335 | sh->vtag != ct->proto.sctp.vtag[dir]) { |
0d53778e | 336 | pr_debug("Verification tag check failed\n"); |
b37e933a | 337 | goto out; |
9fb9cbb1 YK |
338 | } |
339 | ||
328bd899 | 340 | old_state = new_state = SCTP_CONNTRACK_NONE; |
440f0d58 | 341 | spin_lock_bh(&ct->lock); |
9fb9cbb1 | 342 | for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) { |
9fb9cbb1 YK |
343 | /* Special cases of Verification tag check (Sec 8.5.1) */ |
344 | if (sch->type == SCTP_CID_INIT) { | |
345 | /* Sec 8.5.1 (A) */ | |
b37e933a PM |
346 | if (sh->vtag != 0) |
347 | goto out_unlock; | |
9fb9cbb1 YK |
348 | } else if (sch->type == SCTP_CID_ABORT) { |
349 | /* Sec 8.5.1 (B) */ | |
8528819a | 350 | if (sh->vtag != ct->proto.sctp.vtag[dir] && |
b37e933a PM |
351 | sh->vtag != ct->proto.sctp.vtag[!dir]) |
352 | goto out_unlock; | |
9fb9cbb1 YK |
353 | } else if (sch->type == SCTP_CID_SHUTDOWN_COMPLETE) { |
354 | /* Sec 8.5.1 (C) */ | |
8528819a PM |
355 | if (sh->vtag != ct->proto.sctp.vtag[dir] && |
356 | sh->vtag != ct->proto.sctp.vtag[!dir] && | |
9b1c2cfd | 357 | sch->flags & SCTP_CHUNK_FLAG_T) |
b37e933a | 358 | goto out_unlock; |
9fb9cbb1 YK |
359 | } else if (sch->type == SCTP_CID_COOKIE_ECHO) { |
360 | /* Sec 8.5.1 (D) */ | |
b37e933a PM |
361 | if (sh->vtag != ct->proto.sctp.vtag[dir]) |
362 | goto out_unlock; | |
d7ee3519 MK |
363 | } else if (sch->type == SCTP_CID_HEARTBEAT || |
364 | sch->type == SCTP_CID_HEARTBEAT_ACK) { | |
365 | if (ct->proto.sctp.vtag[dir] == 0) { | |
366 | pr_debug("Setting vtag %x for dir %d\n", | |
367 | sh->vtag, dir); | |
368 | ct->proto.sctp.vtag[dir] = sh->vtag; | |
369 | } else if (sh->vtag != ct->proto.sctp.vtag[dir]) { | |
370 | pr_debug("Verification tag check failed\n"); | |
371 | goto out_unlock; | |
372 | } | |
9fb9cbb1 YK |
373 | } |
374 | ||
efe9f68a PM |
375 | old_state = ct->proto.sctp.state; |
376 | new_state = sctp_new_state(dir, old_state, sch->type); | |
9fb9cbb1 YK |
377 | |
378 | /* Invalid */ | |
efe9f68a | 379 | if (new_state == SCTP_CONNTRACK_MAX) { |
0d53778e PM |
380 | pr_debug("nf_conntrack_sctp: Invalid dir=%i ctype=%u " |
381 | "conntrack=%u\n", | |
efe9f68a | 382 | dir, sch->type, old_state); |
b37e933a | 383 | goto out_unlock; |
9fb9cbb1 YK |
384 | } |
385 | ||
386 | /* If it is an INIT or an INIT ACK note down the vtag */ | |
5447d477 PM |
387 | if (sch->type == SCTP_CID_INIT || |
388 | sch->type == SCTP_CID_INIT_ACK) { | |
4ae70c08 | 389 | struct sctp_inithdr _inithdr, *ih; |
9fb9cbb1 | 390 | |
922dbc5b | 391 | ih = skb_header_pointer(skb, offset + sizeof(_sch), |
601e68e1 | 392 | sizeof(_inithdr), &_inithdr); |
b37e933a PM |
393 | if (ih == NULL) |
394 | goto out_unlock; | |
0d53778e | 395 | pr_debug("Setting vtag %x for dir %d\n", |
8528819a PM |
396 | ih->init_tag, !dir); |
397 | ct->proto.sctp.vtag[!dir] = ih->init_tag; | |
9fb9cbb1 YK |
398 | } |
399 | ||
efe9f68a PM |
400 | ct->proto.sctp.state = new_state; |
401 | if (old_state != new_state) | |
a71996fc | 402 | nf_conntrack_event_cache(IPCT_PROTOINFO, ct); |
9fb9cbb1 | 403 | } |
440f0d58 | 404 | spin_unlock_bh(&ct->lock); |
9fb9cbb1 | 405 | |
2c8503f5 | 406 | nf_ct_refresh_acct(ct, ctinfo, skb, timeouts[new_state]); |
9fb9cbb1 | 407 | |
efe9f68a | 408 | if (old_state == SCTP_CONNTRACK_COOKIE_ECHOED && |
8528819a | 409 | dir == IP_CT_DIR_REPLY && |
efe9f68a | 410 | new_state == SCTP_CONNTRACK_ESTABLISHED) { |
0d53778e | 411 | pr_debug("Setting assured bit\n"); |
112f35c9 | 412 | set_bit(IPS_ASSURED_BIT, &ct->status); |
858b3133 | 413 | nf_conntrack_event_cache(IPCT_ASSURED, ct); |
9fb9cbb1 YK |
414 | } |
415 | ||
416 | return NF_ACCEPT; | |
b37e933a PM |
417 | |
418 | out_unlock: | |
440f0d58 | 419 | spin_unlock_bh(&ct->lock); |
b37e933a PM |
420 | out: |
421 | return -NF_ACCEPT; | |
9fb9cbb1 YK |
422 | } |
423 | ||
424 | /* Called when a new connection for this protocol found. */ | |
09f263cd | 425 | static bool sctp_new(struct nf_conn *ct, const struct sk_buff *skb, |
2c8503f5 | 426 | unsigned int dataoff, unsigned int *timeouts) |
9fb9cbb1 | 427 | { |
efe9f68a | 428 | enum sctp_conntrack new_state; |
12c33aa2 JE |
429 | const struct sctphdr *sh; |
430 | struct sctphdr _sctph; | |
431 | const struct sctp_chunkhdr *sch; | |
432 | struct sctp_chunkhdr _sch; | |
9fb9cbb1 | 433 | u_int32_t offset, count; |
35c6d3cb | 434 | unsigned long map[256 / sizeof(unsigned long)] = { 0 }; |
9fb9cbb1 | 435 | |
9fb9cbb1 YK |
436 | sh = skb_header_pointer(skb, dataoff, sizeof(_sctph), &_sctph); |
437 | if (sh == NULL) | |
09f263cd | 438 | return false; |
9fb9cbb1 | 439 | |
112f35c9 | 440 | if (do_basic_checks(ct, skb, dataoff, map) != 0) |
09f263cd | 441 | return false; |
9fb9cbb1 YK |
442 | |
443 | /* If an OOTB packet has any of these chunks discard (Sec 8.4) */ | |
35c6d3cb PM |
444 | if (test_bit(SCTP_CID_ABORT, map) || |
445 | test_bit(SCTP_CID_SHUTDOWN_COMPLETE, map) || | |
446 | test_bit(SCTP_CID_COOKIE_ACK, map)) | |
09f263cd | 447 | return false; |
9fb9cbb1 | 448 | |
e5fc9e7a | 449 | memset(&ct->proto.sctp, 0, sizeof(ct->proto.sctp)); |
efe9f68a | 450 | new_state = SCTP_CONNTRACK_MAX; |
9fb9cbb1 YK |
451 | for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) { |
452 | /* Don't need lock here: this conntrack not in circulation yet */ | |
efe9f68a PM |
453 | new_state = sctp_new_state(IP_CT_DIR_ORIGINAL, |
454 | SCTP_CONNTRACK_NONE, sch->type); | |
9fb9cbb1 YK |
455 | |
456 | /* Invalid: delete conntrack */ | |
efe9f68a PM |
457 | if (new_state == SCTP_CONNTRACK_NONE || |
458 | new_state == SCTP_CONNTRACK_MAX) { | |
0d53778e | 459 | pr_debug("nf_conntrack_sctp: invalid new deleting.\n"); |
09f263cd | 460 | return false; |
9fb9cbb1 YK |
461 | } |
462 | ||
463 | /* Copy the vtag into the state info */ | |
464 | if (sch->type == SCTP_CID_INIT) { | |
4ae70c08 | 465 | struct sctp_inithdr _inithdr, *ih; |
922dbc5b XL |
466 | /* Sec 8.5.1 (A) */ |
467 | if (sh->vtag) | |
468 | return false; | |
9fb9cbb1 | 469 | |
922dbc5b XL |
470 | ih = skb_header_pointer(skb, offset + sizeof(_sch), |
471 | sizeof(_inithdr), &_inithdr); | |
472 | if (!ih) | |
473 | return false; | |
9fb9cbb1 | 474 | |
922dbc5b XL |
475 | pr_debug("Setting vtag %x for new conn\n", |
476 | ih->init_tag); | |
9fb9cbb1 | 477 | |
922dbc5b | 478 | ct->proto.sctp.vtag[IP_CT_DIR_REPLY] = ih->init_tag; |
d7ee3519 MK |
479 | } else if (sch->type == SCTP_CID_HEARTBEAT) { |
480 | pr_debug("Setting vtag %x for secondary conntrack\n", | |
481 | sh->vtag); | |
482 | ct->proto.sctp.vtag[IP_CT_DIR_ORIGINAL] = sh->vtag; | |
9fb9cbb1 YK |
483 | } |
484 | /* If it is a shutdown ack OOTB packet, we expect a return | |
485 | shutdown complete, otherwise an ABORT Sec 8.4 (5) and (8) */ | |
486 | else { | |
0d53778e PM |
487 | pr_debug("Setting vtag %x for new conn OOTB\n", |
488 | sh->vtag); | |
112f35c9 | 489 | ct->proto.sctp.vtag[IP_CT_DIR_REPLY] = sh->vtag; |
9fb9cbb1 YK |
490 | } |
491 | ||
efe9f68a | 492 | ct->proto.sctp.state = new_state; |
9fb9cbb1 YK |
493 | } |
494 | ||
09f263cd | 495 | return true; |
9fb9cbb1 YK |
496 | } |
497 | ||
cf6e007e | 498 | static int sctp_error(struct net *net, struct nf_conn *tpl, struct sk_buff *skb, |
11df4b76 | 499 | unsigned int dataoff, |
cf6e007e DC |
500 | u8 pf, unsigned int hooknum) |
501 | { | |
502 | const struct sctphdr *sh; | |
cf6e007e DC |
503 | const char *logmsg; |
504 | ||
f3c0eb05 | 505 | if (skb->len < dataoff + sizeof(struct sctphdr)) { |
cf6e007e DC |
506 | logmsg = "nf_ct_sctp: short packet "; |
507 | goto out_invalid; | |
508 | } | |
509 | if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING && | |
510 | skb->ip_summed == CHECKSUM_NONE) { | |
f3c0eb05 DC |
511 | if (!skb_make_writable(skb, dataoff + sizeof(struct sctphdr))) { |
512 | logmsg = "nf_ct_sctp: failed to read header "; | |
513 | goto out_invalid; | |
514 | } | |
515 | sh = (const struct sctphdr *)(skb->data + dataoff); | |
cf6e007e DC |
516 | if (sh->checksum != sctp_compute_cksum(skb, dataoff)) { |
517 | logmsg = "nf_ct_sctp: bad CRC "; | |
518 | goto out_invalid; | |
519 | } | |
520 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
521 | } | |
522 | return NF_ACCEPT; | |
523 | out_invalid: | |
c4f3db15 | 524 | nf_l4proto_log_invalid(skb, net, pf, IPPROTO_SCTP, "%s", logmsg); |
cf6e007e DC |
525 | return -NF_ACCEPT; |
526 | } | |
527 | ||
c6dd940b FW |
528 | static bool sctp_can_early_drop(const struct nf_conn *ct) |
529 | { | |
530 | switch (ct->proto.sctp.state) { | |
531 | case SCTP_CONNTRACK_SHUTDOWN_SENT: | |
532 | case SCTP_CONNTRACK_SHUTDOWN_RECD: | |
533 | case SCTP_CONNTRACK_SHUTDOWN_ACK_SENT: | |
534 | return true; | |
535 | default: | |
536 | break; | |
537 | } | |
538 | ||
539 | return false; | |
540 | } | |
541 | ||
c0cd1156 | 542 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK) |
a258860e PNA |
543 | |
544 | #include <linux/netfilter/nfnetlink.h> | |
545 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
546 | ||
547 | static int sctp_to_nlattr(struct sk_buff *skb, struct nlattr *nla, | |
440f0d58 | 548 | struct nf_conn *ct) |
a258860e PNA |
549 | { |
550 | struct nlattr *nest_parms; | |
551 | ||
440f0d58 | 552 | spin_lock_bh(&ct->lock); |
a258860e PNA |
553 | nest_parms = nla_nest_start(skb, CTA_PROTOINFO_SCTP | NLA_F_NESTED); |
554 | if (!nest_parms) | |
555 | goto nla_put_failure; | |
556 | ||
5e8d1eb5 DM |
557 | if (nla_put_u8(skb, CTA_PROTOINFO_SCTP_STATE, ct->proto.sctp.state) || |
558 | nla_put_be32(skb, CTA_PROTOINFO_SCTP_VTAG_ORIGINAL, | |
559 | ct->proto.sctp.vtag[IP_CT_DIR_ORIGINAL]) || | |
560 | nla_put_be32(skb, CTA_PROTOINFO_SCTP_VTAG_REPLY, | |
561 | ct->proto.sctp.vtag[IP_CT_DIR_REPLY])) | |
562 | goto nla_put_failure; | |
a258860e | 563 | |
440f0d58 | 564 | spin_unlock_bh(&ct->lock); |
a258860e PNA |
565 | |
566 | nla_nest_end(skb, nest_parms); | |
567 | ||
568 | return 0; | |
569 | ||
570 | nla_put_failure: | |
440f0d58 | 571 | spin_unlock_bh(&ct->lock); |
a258860e PNA |
572 | return -1; |
573 | } | |
574 | ||
575 | static const struct nla_policy sctp_nla_policy[CTA_PROTOINFO_SCTP_MAX+1] = { | |
576 | [CTA_PROTOINFO_SCTP_STATE] = { .type = NLA_U8 }, | |
577 | [CTA_PROTOINFO_SCTP_VTAG_ORIGINAL] = { .type = NLA_U32 }, | |
578 | [CTA_PROTOINFO_SCTP_VTAG_REPLY] = { .type = NLA_U32 }, | |
579 | }; | |
580 | ||
581 | static int nlattr_to_sctp(struct nlattr *cda[], struct nf_conn *ct) | |
582 | { | |
583 | struct nlattr *attr = cda[CTA_PROTOINFO_SCTP]; | |
584 | struct nlattr *tb[CTA_PROTOINFO_SCTP_MAX+1]; | |
585 | int err; | |
586 | ||
587 | /* updates may not contain the internal protocol info, skip parsing */ | |
588 | if (!attr) | |
589 | return 0; | |
590 | ||
fceb6435 JB |
591 | err = nla_parse_nested(tb, CTA_PROTOINFO_SCTP_MAX, attr, |
592 | sctp_nla_policy, NULL); | |
a258860e PNA |
593 | if (err < 0) |
594 | return err; | |
595 | ||
596 | if (!tb[CTA_PROTOINFO_SCTP_STATE] || | |
597 | !tb[CTA_PROTOINFO_SCTP_VTAG_ORIGINAL] || | |
598 | !tb[CTA_PROTOINFO_SCTP_VTAG_REPLY]) | |
599 | return -EINVAL; | |
600 | ||
440f0d58 | 601 | spin_lock_bh(&ct->lock); |
a258860e PNA |
602 | ct->proto.sctp.state = nla_get_u8(tb[CTA_PROTOINFO_SCTP_STATE]); |
603 | ct->proto.sctp.vtag[IP_CT_DIR_ORIGINAL] = | |
5547cd0a | 604 | nla_get_be32(tb[CTA_PROTOINFO_SCTP_VTAG_ORIGINAL]); |
a258860e | 605 | ct->proto.sctp.vtag[IP_CT_DIR_REPLY] = |
5547cd0a | 606 | nla_get_be32(tb[CTA_PROTOINFO_SCTP_VTAG_REPLY]); |
440f0d58 | 607 | spin_unlock_bh(&ct->lock); |
a258860e PNA |
608 | |
609 | return 0; | |
610 | } | |
a400c30e HE |
611 | |
612 | static int sctp_nlattr_size(void) | |
613 | { | |
614 | return nla_total_size(0) /* CTA_PROTOINFO_SCTP */ | |
615 | + nla_policy_len(sctp_nla_policy, CTA_PROTOINFO_SCTP_MAX + 1); | |
616 | } | |
a258860e PNA |
617 | #endif |
618 | ||
50978462 PNA |
619 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) |
620 | ||
621 | #include <linux/netfilter/nfnetlink.h> | |
622 | #include <linux/netfilter/nfnetlink_cttimeout.h> | |
623 | ||
8264deb8 G |
624 | static int sctp_timeout_nlattr_to_obj(struct nlattr *tb[], |
625 | struct net *net, void *data) | |
50978462 PNA |
626 | { |
627 | unsigned int *timeouts = data; | |
a85406af | 628 | struct nf_sctp_net *sn = sctp_pernet(net); |
50978462 PNA |
629 | int i; |
630 | ||
b4a48eec FW |
631 | if (!timeouts) |
632 | timeouts = sn->timeouts; | |
633 | ||
50978462 PNA |
634 | /* set default SCTP timeouts. */ |
635 | for (i=0; i<SCTP_CONNTRACK_MAX; i++) | |
8264deb8 | 636 | timeouts[i] = sn->timeouts[i]; |
50978462 PNA |
637 | |
638 | /* there's a 1:1 mapping between attributes and protocol states. */ | |
639 | for (i=CTA_TIMEOUT_SCTP_UNSPEC+1; i<CTA_TIMEOUT_SCTP_MAX+1; i++) { | |
640 | if (tb[i]) { | |
641 | timeouts[i] = ntohl(nla_get_be32(tb[i])) * HZ; | |
642 | } | |
643 | } | |
644 | return 0; | |
645 | } | |
646 | ||
647 | static int | |
648 | sctp_timeout_obj_to_nlattr(struct sk_buff *skb, const void *data) | |
649 | { | |
650 | const unsigned int *timeouts = data; | |
651 | int i; | |
652 | ||
5e8d1eb5 DM |
653 | for (i=CTA_TIMEOUT_SCTP_UNSPEC+1; i<CTA_TIMEOUT_SCTP_MAX+1; i++) { |
654 | if (nla_put_be32(skb, i, htonl(timeouts[i] / HZ))) | |
655 | goto nla_put_failure; | |
656 | } | |
50978462 PNA |
657 | return 0; |
658 | ||
659 | nla_put_failure: | |
660 | return -ENOSPC; | |
661 | } | |
662 | ||
663 | static const struct nla_policy | |
664 | sctp_timeout_nla_policy[CTA_TIMEOUT_SCTP_MAX+1] = { | |
665 | [CTA_TIMEOUT_SCTP_CLOSED] = { .type = NLA_U32 }, | |
666 | [CTA_TIMEOUT_SCTP_COOKIE_WAIT] = { .type = NLA_U32 }, | |
667 | [CTA_TIMEOUT_SCTP_COOKIE_ECHOED] = { .type = NLA_U32 }, | |
668 | [CTA_TIMEOUT_SCTP_ESTABLISHED] = { .type = NLA_U32 }, | |
669 | [CTA_TIMEOUT_SCTP_SHUTDOWN_SENT] = { .type = NLA_U32 }, | |
670 | [CTA_TIMEOUT_SCTP_SHUTDOWN_RECD] = { .type = NLA_U32 }, | |
671 | [CTA_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = { .type = NLA_U32 }, | |
d7ee3519 MK |
672 | [CTA_TIMEOUT_SCTP_HEARTBEAT_SENT] = { .type = NLA_U32 }, |
673 | [CTA_TIMEOUT_SCTP_HEARTBEAT_ACKED] = { .type = NLA_U32 }, | |
50978462 PNA |
674 | }; |
675 | #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ | |
676 | ||
677 | ||
9fb9cbb1 | 678 | #ifdef CONFIG_SYSCTL |
933a41e7 | 679 | static struct ctl_table sctp_sysctl_table[] = { |
9fb9cbb1 | 680 | { |
9fb9cbb1 | 681 | .procname = "nf_conntrack_sctp_timeout_closed", |
9fb9cbb1 YK |
682 | .maxlen = sizeof(unsigned int), |
683 | .mode = 0644, | |
6d9f239a | 684 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
685 | }, |
686 | { | |
9fb9cbb1 | 687 | .procname = "nf_conntrack_sctp_timeout_cookie_wait", |
9fb9cbb1 YK |
688 | .maxlen = sizeof(unsigned int), |
689 | .mode = 0644, | |
6d9f239a | 690 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
691 | }, |
692 | { | |
9fb9cbb1 | 693 | .procname = "nf_conntrack_sctp_timeout_cookie_echoed", |
9fb9cbb1 YK |
694 | .maxlen = sizeof(unsigned int), |
695 | .mode = 0644, | |
6d9f239a | 696 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
697 | }, |
698 | { | |
9fb9cbb1 | 699 | .procname = "nf_conntrack_sctp_timeout_established", |
9fb9cbb1 YK |
700 | .maxlen = sizeof(unsigned int), |
701 | .mode = 0644, | |
6d9f239a | 702 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
703 | }, |
704 | { | |
9fb9cbb1 | 705 | .procname = "nf_conntrack_sctp_timeout_shutdown_sent", |
9fb9cbb1 YK |
706 | .maxlen = sizeof(unsigned int), |
707 | .mode = 0644, | |
6d9f239a | 708 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
709 | }, |
710 | { | |
9fb9cbb1 | 711 | .procname = "nf_conntrack_sctp_timeout_shutdown_recd", |
9fb9cbb1 YK |
712 | .maxlen = sizeof(unsigned int), |
713 | .mode = 0644, | |
6d9f239a | 714 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
715 | }, |
716 | { | |
9fb9cbb1 | 717 | .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent", |
9fb9cbb1 YK |
718 | .maxlen = sizeof(unsigned int), |
719 | .mode = 0644, | |
6d9f239a | 720 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 | 721 | }, |
d7ee3519 MK |
722 | { |
723 | .procname = "nf_conntrack_sctp_timeout_heartbeat_sent", | |
724 | .maxlen = sizeof(unsigned int), | |
725 | .mode = 0644, | |
726 | .proc_handler = proc_dointvec_jiffies, | |
727 | }, | |
728 | { | |
729 | .procname = "nf_conntrack_sctp_timeout_heartbeat_acked", | |
730 | .maxlen = sizeof(unsigned int), | |
731 | .mode = 0644, | |
732 | .proc_handler = proc_dointvec_jiffies, | |
733 | }, | |
f8572d8f | 734 | { } |
9fb9cbb1 | 735 | }; |
933a41e7 | 736 | #endif |
9fb9cbb1 | 737 | |
f42c4183 | 738 | static int sctp_kmemdup_sysctl_table(struct nf_proto_net *pn, |
a85406af | 739 | struct nf_sctp_net *sn) |
49d485a3 G |
740 | { |
741 | #ifdef CONFIG_SYSCTL | |
49d485a3 G |
742 | if (pn->ctl_table) |
743 | return 0; | |
744 | ||
745 | pn->ctl_table = kmemdup(sctp_sysctl_table, | |
746 | sizeof(sctp_sysctl_table), | |
747 | GFP_KERNEL); | |
748 | if (!pn->ctl_table) | |
749 | return -ENOMEM; | |
750 | ||
751 | pn->ctl_table[0].data = &sn->timeouts[SCTP_CONNTRACK_CLOSED]; | |
752 | pn->ctl_table[1].data = &sn->timeouts[SCTP_CONNTRACK_COOKIE_WAIT]; | |
753 | pn->ctl_table[2].data = &sn->timeouts[SCTP_CONNTRACK_COOKIE_ECHOED]; | |
754 | pn->ctl_table[3].data = &sn->timeouts[SCTP_CONNTRACK_ESTABLISHED]; | |
755 | pn->ctl_table[4].data = &sn->timeouts[SCTP_CONNTRACK_SHUTDOWN_SENT]; | |
756 | pn->ctl_table[5].data = &sn->timeouts[SCTP_CONNTRACK_SHUTDOWN_RECD]; | |
757 | pn->ctl_table[6].data = &sn->timeouts[SCTP_CONNTRACK_SHUTDOWN_ACK_SENT]; | |
d7ee3519 MK |
758 | pn->ctl_table[7].data = &sn->timeouts[SCTP_CONNTRACK_HEARTBEAT_SENT]; |
759 | pn->ctl_table[8].data = &sn->timeouts[SCTP_CONNTRACK_HEARTBEAT_ACKED]; | |
49d485a3 G |
760 | #endif |
761 | return 0; | |
762 | } | |
763 | ||
f42c4183 | 764 | static int sctp_init_net(struct net *net, u_int16_t proto) |
49d485a3 | 765 | { |
a85406af | 766 | struct nf_sctp_net *sn = sctp_pernet(net); |
f42c4183 | 767 | struct nf_proto_net *pn = &sn->pn; |
49d485a3 | 768 | |
f42c4183 G |
769 | if (!pn->users) { |
770 | int i; | |
49d485a3 | 771 | |
f42c4183 G |
772 | for (i = 0; i < SCTP_CONNTRACK_MAX; i++) |
773 | sn->timeouts[i] = sctp_timeouts[i]; | |
774 | } | |
49d485a3 | 775 | |
adf05168 | 776 | return sctp_kmemdup_sysctl_table(pn, sn); |
49d485a3 G |
777 | } |
778 | ||
deaa0a97 LZ |
779 | static struct nf_proto_net *sctp_get_net_proto(struct net *net) |
780 | { | |
781 | return &net->ct.nf_ct_proto.sctp.pn; | |
782 | } | |
783 | ||
a85406af | 784 | struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp4 __read_mostly = { |
933a41e7 PM |
785 | .l3proto = PF_INET, |
786 | .l4proto = IPPROTO_SCTP, | |
933a41e7 PM |
787 | .pkt_to_tuple = sctp_pkt_to_tuple, |
788 | .invert_tuple = sctp_invert_tuple, | |
ea48cc83 | 789 | #ifdef CONFIG_NF_CONNTRACK_PROCFS |
933a41e7 | 790 | .print_conntrack = sctp_print_conntrack, |
ea48cc83 | 791 | #endif |
933a41e7 | 792 | .packet = sctp_packet, |
2c8503f5 | 793 | .get_timeouts = sctp_get_timeouts, |
933a41e7 | 794 | .new = sctp_new, |
cf6e007e | 795 | .error = sctp_error, |
c6dd940b | 796 | .can_early_drop = sctp_can_early_drop, |
933a41e7 | 797 | .me = THIS_MODULE, |
c0cd1156 | 798 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK) |
a258860e | 799 | .to_nlattr = sctp_to_nlattr, |
a400c30e | 800 | .nlattr_size = sctp_nlattr_size, |
a258860e | 801 | .from_nlattr = nlattr_to_sctp, |
c7212e9d | 802 | .tuple_to_nlattr = nf_ct_port_tuple_to_nlattr, |
a400c30e | 803 | .nlattr_tuple_size = nf_ct_port_nlattr_tuple_size, |
c7212e9d PNA |
804 | .nlattr_to_tuple = nf_ct_port_nlattr_to_tuple, |
805 | .nla_policy = nf_ct_port_nla_policy, | |
806 | #endif | |
50978462 PNA |
807 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) |
808 | .ctnl_timeout = { | |
809 | .nlattr_to_obj = sctp_timeout_nlattr_to_obj, | |
810 | .obj_to_nlattr = sctp_timeout_obj_to_nlattr, | |
811 | .nlattr_max = CTA_TIMEOUT_SCTP_MAX, | |
812 | .obj_size = sizeof(unsigned int) * SCTP_CONNTRACK_MAX, | |
813 | .nla_policy = sctp_timeout_nla_policy, | |
814 | }, | |
815 | #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ | |
f42c4183 | 816 | .init_net = sctp_init_net, |
deaa0a97 | 817 | .get_net_proto = sctp_get_net_proto, |
9fb9cbb1 | 818 | }; |
a85406af | 819 | EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_sctp4); |
9fb9cbb1 | 820 | |
a85406af | 821 | struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp6 __read_mostly = { |
933a41e7 PM |
822 | .l3proto = PF_INET6, |
823 | .l4proto = IPPROTO_SCTP, | |
933a41e7 PM |
824 | .pkt_to_tuple = sctp_pkt_to_tuple, |
825 | .invert_tuple = sctp_invert_tuple, | |
ea48cc83 | 826 | #ifdef CONFIG_NF_CONNTRACK_PROCFS |
933a41e7 | 827 | .print_conntrack = sctp_print_conntrack, |
ea48cc83 | 828 | #endif |
933a41e7 | 829 | .packet = sctp_packet, |
2c8503f5 | 830 | .get_timeouts = sctp_get_timeouts, |
933a41e7 | 831 | .new = sctp_new, |
cf6e007e | 832 | .error = sctp_error, |
c6dd940b | 833 | .can_early_drop = sctp_can_early_drop, |
933a41e7 | 834 | .me = THIS_MODULE, |
c0cd1156 | 835 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK) |
a258860e | 836 | .to_nlattr = sctp_to_nlattr, |
a400c30e | 837 | .nlattr_size = sctp_nlattr_size, |
a258860e | 838 | .from_nlattr = nlattr_to_sctp, |
c7212e9d | 839 | .tuple_to_nlattr = nf_ct_port_tuple_to_nlattr, |
a400c30e | 840 | .nlattr_tuple_size = nf_ct_port_nlattr_tuple_size, |
c7212e9d PNA |
841 | .nlattr_to_tuple = nf_ct_port_nlattr_to_tuple, |
842 | .nla_policy = nf_ct_port_nla_policy, | |
50978462 PNA |
843 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) |
844 | .ctnl_timeout = { | |
845 | .nlattr_to_obj = sctp_timeout_nlattr_to_obj, | |
846 | .obj_to_nlattr = sctp_timeout_obj_to_nlattr, | |
847 | .nlattr_max = CTA_TIMEOUT_SCTP_MAX, | |
848 | .obj_size = sizeof(unsigned int) * SCTP_CONNTRACK_MAX, | |
849 | .nla_policy = sctp_timeout_nla_policy, | |
850 | }, | |
851 | #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ | |
9fb9cbb1 | 852 | #endif |
f42c4183 | 853 | .init_net = sctp_init_net, |
deaa0a97 | 854 | .get_net_proto = sctp_get_net_proto, |
933a41e7 | 855 | }; |
a85406af | 856 | EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_sctp6); |