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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 | ||
177 | /* Print out the per-protocol part of the tuple. */ | |
824f1fbe JP |
178 | static void sctp_print_tuple(struct seq_file *s, |
179 | const struct nf_conntrack_tuple *tuple) | |
9fb9cbb1 | 180 | { |
824f1fbe JP |
181 | seq_printf(s, "sport=%hu dport=%hu ", |
182 | ntohs(tuple->src.u.sctp.port), | |
183 | ntohs(tuple->dst.u.sctp.port)); | |
9fb9cbb1 YK |
184 | } |
185 | ||
186 | /* Print out the private part of the conntrack. */ | |
37246a58 | 187 | static void sctp_print_conntrack(struct seq_file *s, struct nf_conn *ct) |
9fb9cbb1 | 188 | { |
a163f2cb | 189 | seq_printf(s, "%s ", sctp_conntrack_names[ct->proto.sctp.state]); |
9fb9cbb1 YK |
190 | } |
191 | ||
192 | #define for_each_sctp_chunk(skb, sch, _sch, offset, dataoff, count) \ | |
e79ec50b JE |
193 | for ((offset) = (dataoff) + sizeof(sctp_sctphdr_t), (count) = 0; \ |
194 | (offset) < (skb)->len && \ | |
195 | ((sch) = skb_header_pointer((skb), (offset), sizeof(_sch), &(_sch))); \ | |
196 | (offset) += (ntohs((sch)->length) + 3) & ~3, (count)++) | |
9fb9cbb1 YK |
197 | |
198 | /* Some validity checks to make sure the chunks are fine */ | |
112f35c9 | 199 | static int do_basic_checks(struct nf_conn *ct, |
9fb9cbb1 YK |
200 | const struct sk_buff *skb, |
201 | unsigned int dataoff, | |
35c6d3cb | 202 | unsigned long *map) |
9fb9cbb1 YK |
203 | { |
204 | u_int32_t offset, count; | |
205 | sctp_chunkhdr_t _sch, *sch; | |
206 | int flag; | |
207 | ||
9fb9cbb1 YK |
208 | flag = 0; |
209 | ||
210 | for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) { | |
0d53778e | 211 | pr_debug("Chunk Num: %d Type: %d\n", count, sch->type); |
9fb9cbb1 | 212 | |
5447d477 PM |
213 | if (sch->type == SCTP_CID_INIT || |
214 | sch->type == SCTP_CID_INIT_ACK || | |
215 | sch->type == SCTP_CID_SHUTDOWN_COMPLETE) | |
9fb9cbb1 | 216 | flag = 1; |
9fb9cbb1 | 217 | |
e17df688 PM |
218 | /* |
219 | * Cookie Ack/Echo chunks not the first OR | |
220 | * Init / Init Ack / Shutdown compl chunks not the only chunks | |
221 | * OR zero-length. | |
222 | */ | |
5447d477 PM |
223 | if (((sch->type == SCTP_CID_COOKIE_ACK || |
224 | sch->type == SCTP_CID_COOKIE_ECHO || | |
225 | flag) && | |
226 | count != 0) || !sch->length) { | |
0d53778e | 227 | pr_debug("Basic checks failed\n"); |
9fb9cbb1 YK |
228 | return 1; |
229 | } | |
230 | ||
5447d477 | 231 | if (map) |
35c6d3cb | 232 | set_bit(sch->type, map); |
9fb9cbb1 YK |
233 | } |
234 | ||
0d53778e | 235 | pr_debug("Basic checks passed\n"); |
dd7271fe | 236 | return count == 0; |
9fb9cbb1 YK |
237 | } |
238 | ||
efe9f68a PM |
239 | static int sctp_new_state(enum ip_conntrack_dir dir, |
240 | enum sctp_conntrack cur_state, | |
241 | int chunk_type) | |
9fb9cbb1 YK |
242 | { |
243 | int i; | |
244 | ||
0d53778e | 245 | pr_debug("Chunk type: %d\n", chunk_type); |
9fb9cbb1 YK |
246 | |
247 | switch (chunk_type) { | |
5447d477 PM |
248 | case SCTP_CID_INIT: |
249 | pr_debug("SCTP_CID_INIT\n"); | |
250 | i = 0; | |
251 | break; | |
252 | case SCTP_CID_INIT_ACK: | |
253 | pr_debug("SCTP_CID_INIT_ACK\n"); | |
254 | i = 1; | |
255 | break; | |
256 | case SCTP_CID_ABORT: | |
257 | pr_debug("SCTP_CID_ABORT\n"); | |
258 | i = 2; | |
259 | break; | |
260 | case SCTP_CID_SHUTDOWN: | |
261 | pr_debug("SCTP_CID_SHUTDOWN\n"); | |
262 | i = 3; | |
263 | break; | |
264 | case SCTP_CID_SHUTDOWN_ACK: | |
265 | pr_debug("SCTP_CID_SHUTDOWN_ACK\n"); | |
266 | i = 4; | |
267 | break; | |
268 | case SCTP_CID_ERROR: | |
269 | pr_debug("SCTP_CID_ERROR\n"); | |
270 | i = 5; | |
271 | break; | |
272 | case SCTP_CID_COOKIE_ECHO: | |
273 | pr_debug("SCTP_CID_COOKIE_ECHO\n"); | |
274 | i = 6; | |
275 | break; | |
276 | case SCTP_CID_COOKIE_ACK: | |
277 | pr_debug("SCTP_CID_COOKIE_ACK\n"); | |
278 | i = 7; | |
279 | break; | |
280 | case SCTP_CID_SHUTDOWN_COMPLETE: | |
281 | pr_debug("SCTP_CID_SHUTDOWN_COMPLETE\n"); | |
282 | i = 8; | |
283 | break; | |
d7ee3519 MK |
284 | case SCTP_CID_HEARTBEAT: |
285 | pr_debug("SCTP_CID_HEARTBEAT"); | |
286 | i = 9; | |
287 | break; | |
288 | case SCTP_CID_HEARTBEAT_ACK: | |
289 | pr_debug("SCTP_CID_HEARTBEAT_ACK"); | |
290 | i = 10; | |
291 | break; | |
5447d477 | 292 | default: |
d7ee3519 | 293 | /* Other chunks like DATA or SACK do not change the state */ |
5447d477 PM |
294 | pr_debug("Unknown chunk type, Will stay in %s\n", |
295 | sctp_conntrack_names[cur_state]); | |
296 | return cur_state; | |
9fb9cbb1 YK |
297 | } |
298 | ||
0d53778e PM |
299 | pr_debug("dir: %d cur_state: %s chunk_type: %d new_state: %s\n", |
300 | dir, sctp_conntrack_names[cur_state], chunk_type, | |
301 | sctp_conntrack_names[sctp_conntracks[dir][i][cur_state]]); | |
9fb9cbb1 YK |
302 | |
303 | return sctp_conntracks[dir][i][cur_state]; | |
304 | } | |
305 | ||
2c8503f5 PNA |
306 | static unsigned int *sctp_get_timeouts(struct net *net) |
307 | { | |
49d485a3 | 308 | return sctp_pernet(net)->timeouts; |
2c8503f5 PNA |
309 | } |
310 | ||
b37e933a | 311 | /* Returns verdict for packet, or -NF_ACCEPT for invalid. */ |
112f35c9 | 312 | static int sctp_packet(struct nf_conn *ct, |
9fb9cbb1 YK |
313 | const struct sk_buff *skb, |
314 | unsigned int dataoff, | |
315 | enum ip_conntrack_info ctinfo, | |
76108cea | 316 | u_int8_t pf, |
2c8503f5 PNA |
317 | unsigned int hooknum, |
318 | unsigned int *timeouts) | |
9fb9cbb1 | 319 | { |
efe9f68a | 320 | enum sctp_conntrack new_state, old_state; |
8528819a | 321 | enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo); |
12c33aa2 JE |
322 | const struct sctphdr *sh; |
323 | struct sctphdr _sctph; | |
324 | const struct sctp_chunkhdr *sch; | |
325 | struct sctp_chunkhdr _sch; | |
9fb9cbb1 | 326 | u_int32_t offset, count; |
35c6d3cb | 327 | unsigned long map[256 / sizeof(unsigned long)] = { 0 }; |
9fb9cbb1 | 328 | |
9fb9cbb1 YK |
329 | sh = skb_header_pointer(skb, dataoff, sizeof(_sctph), &_sctph); |
330 | if (sh == NULL) | |
b37e933a | 331 | goto out; |
9fb9cbb1 | 332 | |
112f35c9 | 333 | if (do_basic_checks(ct, skb, dataoff, map) != 0) |
b37e933a | 334 | goto out; |
9fb9cbb1 YK |
335 | |
336 | /* Check the verification tag (Sec 8.5) */ | |
35c6d3cb PM |
337 | if (!test_bit(SCTP_CID_INIT, map) && |
338 | !test_bit(SCTP_CID_SHUTDOWN_COMPLETE, map) && | |
339 | !test_bit(SCTP_CID_COOKIE_ECHO, map) && | |
340 | !test_bit(SCTP_CID_ABORT, map) && | |
341 | !test_bit(SCTP_CID_SHUTDOWN_ACK, map) && | |
d7ee3519 MK |
342 | !test_bit(SCTP_CID_HEARTBEAT, map) && |
343 | !test_bit(SCTP_CID_HEARTBEAT_ACK, map) && | |
8528819a | 344 | sh->vtag != ct->proto.sctp.vtag[dir]) { |
0d53778e | 345 | pr_debug("Verification tag check failed\n"); |
b37e933a | 346 | goto out; |
9fb9cbb1 YK |
347 | } |
348 | ||
328bd899 | 349 | old_state = new_state = SCTP_CONNTRACK_NONE; |
440f0d58 | 350 | spin_lock_bh(&ct->lock); |
9fb9cbb1 | 351 | for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) { |
9fb9cbb1 YK |
352 | /* Special cases of Verification tag check (Sec 8.5.1) */ |
353 | if (sch->type == SCTP_CID_INIT) { | |
354 | /* Sec 8.5.1 (A) */ | |
b37e933a PM |
355 | if (sh->vtag != 0) |
356 | goto out_unlock; | |
9fb9cbb1 YK |
357 | } else if (sch->type == SCTP_CID_ABORT) { |
358 | /* Sec 8.5.1 (B) */ | |
8528819a | 359 | if (sh->vtag != ct->proto.sctp.vtag[dir] && |
b37e933a PM |
360 | sh->vtag != ct->proto.sctp.vtag[!dir]) |
361 | goto out_unlock; | |
9fb9cbb1 YK |
362 | } else if (sch->type == SCTP_CID_SHUTDOWN_COMPLETE) { |
363 | /* Sec 8.5.1 (C) */ | |
8528819a PM |
364 | if (sh->vtag != ct->proto.sctp.vtag[dir] && |
365 | sh->vtag != ct->proto.sctp.vtag[!dir] && | |
9b1c2cfd | 366 | sch->flags & SCTP_CHUNK_FLAG_T) |
b37e933a | 367 | goto out_unlock; |
9fb9cbb1 YK |
368 | } else if (sch->type == SCTP_CID_COOKIE_ECHO) { |
369 | /* Sec 8.5.1 (D) */ | |
b37e933a PM |
370 | if (sh->vtag != ct->proto.sctp.vtag[dir]) |
371 | goto out_unlock; | |
d7ee3519 MK |
372 | } else if (sch->type == SCTP_CID_HEARTBEAT || |
373 | sch->type == SCTP_CID_HEARTBEAT_ACK) { | |
374 | if (ct->proto.sctp.vtag[dir] == 0) { | |
375 | pr_debug("Setting vtag %x for dir %d\n", | |
376 | sh->vtag, dir); | |
377 | ct->proto.sctp.vtag[dir] = sh->vtag; | |
378 | } else if (sh->vtag != ct->proto.sctp.vtag[dir]) { | |
379 | pr_debug("Verification tag check failed\n"); | |
380 | goto out_unlock; | |
381 | } | |
9fb9cbb1 YK |
382 | } |
383 | ||
efe9f68a PM |
384 | old_state = ct->proto.sctp.state; |
385 | new_state = sctp_new_state(dir, old_state, sch->type); | |
9fb9cbb1 YK |
386 | |
387 | /* Invalid */ | |
efe9f68a | 388 | if (new_state == SCTP_CONNTRACK_MAX) { |
0d53778e PM |
389 | pr_debug("nf_conntrack_sctp: Invalid dir=%i ctype=%u " |
390 | "conntrack=%u\n", | |
efe9f68a | 391 | dir, sch->type, old_state); |
b37e933a | 392 | goto out_unlock; |
9fb9cbb1 YK |
393 | } |
394 | ||
395 | /* If it is an INIT or an INIT ACK note down the vtag */ | |
5447d477 PM |
396 | if (sch->type == SCTP_CID_INIT || |
397 | sch->type == SCTP_CID_INIT_ACK) { | |
9fb9cbb1 YK |
398 | sctp_inithdr_t _inithdr, *ih; |
399 | ||
400 | ih = skb_header_pointer(skb, offset + sizeof(sctp_chunkhdr_t), | |
601e68e1 | 401 | sizeof(_inithdr), &_inithdr); |
b37e933a PM |
402 | if (ih == NULL) |
403 | goto out_unlock; | |
0d53778e | 404 | pr_debug("Setting vtag %x for dir %d\n", |
8528819a PM |
405 | ih->init_tag, !dir); |
406 | ct->proto.sctp.vtag[!dir] = ih->init_tag; | |
9fb9cbb1 YK |
407 | } |
408 | ||
efe9f68a PM |
409 | ct->proto.sctp.state = new_state; |
410 | if (old_state != new_state) | |
a71996fc | 411 | nf_conntrack_event_cache(IPCT_PROTOINFO, ct); |
9fb9cbb1 | 412 | } |
440f0d58 | 413 | spin_unlock_bh(&ct->lock); |
9fb9cbb1 | 414 | |
2c8503f5 | 415 | nf_ct_refresh_acct(ct, ctinfo, skb, timeouts[new_state]); |
9fb9cbb1 | 416 | |
efe9f68a | 417 | if (old_state == SCTP_CONNTRACK_COOKIE_ECHOED && |
8528819a | 418 | dir == IP_CT_DIR_REPLY && |
efe9f68a | 419 | new_state == SCTP_CONNTRACK_ESTABLISHED) { |
0d53778e | 420 | pr_debug("Setting assured bit\n"); |
112f35c9 | 421 | set_bit(IPS_ASSURED_BIT, &ct->status); |
858b3133 | 422 | nf_conntrack_event_cache(IPCT_ASSURED, ct); |
9fb9cbb1 YK |
423 | } |
424 | ||
425 | return NF_ACCEPT; | |
b37e933a PM |
426 | |
427 | out_unlock: | |
440f0d58 | 428 | spin_unlock_bh(&ct->lock); |
b37e933a PM |
429 | out: |
430 | return -NF_ACCEPT; | |
9fb9cbb1 YK |
431 | } |
432 | ||
433 | /* Called when a new connection for this protocol found. */ | |
09f263cd | 434 | static bool sctp_new(struct nf_conn *ct, const struct sk_buff *skb, |
2c8503f5 | 435 | unsigned int dataoff, unsigned int *timeouts) |
9fb9cbb1 | 436 | { |
efe9f68a | 437 | enum sctp_conntrack new_state; |
12c33aa2 JE |
438 | const struct sctphdr *sh; |
439 | struct sctphdr _sctph; | |
440 | const struct sctp_chunkhdr *sch; | |
441 | struct sctp_chunkhdr _sch; | |
9fb9cbb1 | 442 | u_int32_t offset, count; |
35c6d3cb | 443 | unsigned long map[256 / sizeof(unsigned long)] = { 0 }; |
9fb9cbb1 | 444 | |
9fb9cbb1 YK |
445 | sh = skb_header_pointer(skb, dataoff, sizeof(_sctph), &_sctph); |
446 | if (sh == NULL) | |
09f263cd | 447 | return false; |
9fb9cbb1 | 448 | |
112f35c9 | 449 | if (do_basic_checks(ct, skb, dataoff, map) != 0) |
09f263cd | 450 | return false; |
9fb9cbb1 YK |
451 | |
452 | /* If an OOTB packet has any of these chunks discard (Sec 8.4) */ | |
35c6d3cb PM |
453 | if (test_bit(SCTP_CID_ABORT, map) || |
454 | test_bit(SCTP_CID_SHUTDOWN_COMPLETE, map) || | |
455 | test_bit(SCTP_CID_COOKIE_ACK, map)) | |
09f263cd | 456 | return false; |
9fb9cbb1 | 457 | |
e5fc9e7a | 458 | memset(&ct->proto.sctp, 0, sizeof(ct->proto.sctp)); |
efe9f68a | 459 | new_state = SCTP_CONNTRACK_MAX; |
9fb9cbb1 YK |
460 | for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) { |
461 | /* Don't need lock here: this conntrack not in circulation yet */ | |
efe9f68a PM |
462 | new_state = sctp_new_state(IP_CT_DIR_ORIGINAL, |
463 | SCTP_CONNTRACK_NONE, sch->type); | |
9fb9cbb1 YK |
464 | |
465 | /* Invalid: delete conntrack */ | |
efe9f68a PM |
466 | if (new_state == SCTP_CONNTRACK_NONE || |
467 | new_state == SCTP_CONNTRACK_MAX) { | |
0d53778e | 468 | pr_debug("nf_conntrack_sctp: invalid new deleting.\n"); |
09f263cd | 469 | return false; |
9fb9cbb1 YK |
470 | } |
471 | ||
472 | /* Copy the vtag into the state info */ | |
473 | if (sch->type == SCTP_CID_INIT) { | |
474 | if (sh->vtag == 0) { | |
475 | sctp_inithdr_t _inithdr, *ih; | |
476 | ||
477 | ih = skb_header_pointer(skb, offset + sizeof(sctp_chunkhdr_t), | |
601e68e1 | 478 | sizeof(_inithdr), &_inithdr); |
9fb9cbb1 | 479 | if (ih == NULL) |
09f263cd | 480 | return false; |
9fb9cbb1 | 481 | |
0d53778e PM |
482 | pr_debug("Setting vtag %x for new conn\n", |
483 | ih->init_tag); | |
9fb9cbb1 | 484 | |
112f35c9 | 485 | ct->proto.sctp.vtag[IP_CT_DIR_REPLY] = |
9fb9cbb1 YK |
486 | ih->init_tag; |
487 | } else { | |
488 | /* Sec 8.5.1 (A) */ | |
09f263cd | 489 | return false; |
9fb9cbb1 | 490 | } |
d7ee3519 MK |
491 | } else if (sch->type == SCTP_CID_HEARTBEAT) { |
492 | pr_debug("Setting vtag %x for secondary conntrack\n", | |
493 | sh->vtag); | |
494 | ct->proto.sctp.vtag[IP_CT_DIR_ORIGINAL] = sh->vtag; | |
9fb9cbb1 YK |
495 | } |
496 | /* If it is a shutdown ack OOTB packet, we expect a return | |
497 | shutdown complete, otherwise an ABORT Sec 8.4 (5) and (8) */ | |
498 | else { | |
0d53778e PM |
499 | pr_debug("Setting vtag %x for new conn OOTB\n", |
500 | sh->vtag); | |
112f35c9 | 501 | ct->proto.sctp.vtag[IP_CT_DIR_REPLY] = sh->vtag; |
9fb9cbb1 YK |
502 | } |
503 | ||
efe9f68a | 504 | ct->proto.sctp.state = new_state; |
9fb9cbb1 YK |
505 | } |
506 | ||
09f263cd | 507 | return true; |
9fb9cbb1 YK |
508 | } |
509 | ||
cf6e007e | 510 | static int sctp_error(struct net *net, struct nf_conn *tpl, struct sk_buff *skb, |
11df4b76 | 511 | unsigned int dataoff, |
cf6e007e DC |
512 | u8 pf, unsigned int hooknum) |
513 | { | |
514 | const struct sctphdr *sh; | |
515 | struct sctphdr _sctph; | |
516 | const char *logmsg; | |
517 | ||
518 | sh = skb_header_pointer(skb, dataoff, sizeof(_sctph), &_sctph); | |
519 | if (!sh) { | |
520 | logmsg = "nf_ct_sctp: short packet "; | |
521 | goto out_invalid; | |
522 | } | |
523 | if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING && | |
524 | skb->ip_summed == CHECKSUM_NONE) { | |
525 | if (sh->checksum != sctp_compute_cksum(skb, dataoff)) { | |
526 | logmsg = "nf_ct_sctp: bad CRC "; | |
527 | goto out_invalid; | |
528 | } | |
529 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
530 | } | |
531 | return NF_ACCEPT; | |
532 | out_invalid: | |
533 | if (LOG_INVALID(net, IPPROTO_SCTP)) | |
534 | nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL, "%s", logmsg); | |
535 | return -NF_ACCEPT; | |
536 | } | |
537 | ||
c0cd1156 | 538 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK) |
a258860e PNA |
539 | |
540 | #include <linux/netfilter/nfnetlink.h> | |
541 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
542 | ||
543 | static int sctp_to_nlattr(struct sk_buff *skb, struct nlattr *nla, | |
440f0d58 | 544 | struct nf_conn *ct) |
a258860e PNA |
545 | { |
546 | struct nlattr *nest_parms; | |
547 | ||
440f0d58 | 548 | spin_lock_bh(&ct->lock); |
a258860e PNA |
549 | nest_parms = nla_nest_start(skb, CTA_PROTOINFO_SCTP | NLA_F_NESTED); |
550 | if (!nest_parms) | |
551 | goto nla_put_failure; | |
552 | ||
5e8d1eb5 DM |
553 | if (nla_put_u8(skb, CTA_PROTOINFO_SCTP_STATE, ct->proto.sctp.state) || |
554 | nla_put_be32(skb, CTA_PROTOINFO_SCTP_VTAG_ORIGINAL, | |
555 | ct->proto.sctp.vtag[IP_CT_DIR_ORIGINAL]) || | |
556 | nla_put_be32(skb, CTA_PROTOINFO_SCTP_VTAG_REPLY, | |
557 | ct->proto.sctp.vtag[IP_CT_DIR_REPLY])) | |
558 | goto nla_put_failure; | |
a258860e | 559 | |
440f0d58 | 560 | spin_unlock_bh(&ct->lock); |
a258860e PNA |
561 | |
562 | nla_nest_end(skb, nest_parms); | |
563 | ||
564 | return 0; | |
565 | ||
566 | nla_put_failure: | |
440f0d58 | 567 | spin_unlock_bh(&ct->lock); |
a258860e PNA |
568 | return -1; |
569 | } | |
570 | ||
571 | static const struct nla_policy sctp_nla_policy[CTA_PROTOINFO_SCTP_MAX+1] = { | |
572 | [CTA_PROTOINFO_SCTP_STATE] = { .type = NLA_U8 }, | |
573 | [CTA_PROTOINFO_SCTP_VTAG_ORIGINAL] = { .type = NLA_U32 }, | |
574 | [CTA_PROTOINFO_SCTP_VTAG_REPLY] = { .type = NLA_U32 }, | |
575 | }; | |
576 | ||
577 | static int nlattr_to_sctp(struct nlattr *cda[], struct nf_conn *ct) | |
578 | { | |
579 | struct nlattr *attr = cda[CTA_PROTOINFO_SCTP]; | |
580 | struct nlattr *tb[CTA_PROTOINFO_SCTP_MAX+1]; | |
581 | int err; | |
582 | ||
583 | /* updates may not contain the internal protocol info, skip parsing */ | |
584 | if (!attr) | |
585 | return 0; | |
586 | ||
587 | err = nla_parse_nested(tb, | |
588 | CTA_PROTOINFO_SCTP_MAX, | |
589 | attr, | |
590 | sctp_nla_policy); | |
591 | if (err < 0) | |
592 | return err; | |
593 | ||
594 | if (!tb[CTA_PROTOINFO_SCTP_STATE] || | |
595 | !tb[CTA_PROTOINFO_SCTP_VTAG_ORIGINAL] || | |
596 | !tb[CTA_PROTOINFO_SCTP_VTAG_REPLY]) | |
597 | return -EINVAL; | |
598 | ||
440f0d58 | 599 | spin_lock_bh(&ct->lock); |
a258860e PNA |
600 | ct->proto.sctp.state = nla_get_u8(tb[CTA_PROTOINFO_SCTP_STATE]); |
601 | ct->proto.sctp.vtag[IP_CT_DIR_ORIGINAL] = | |
5547cd0a | 602 | nla_get_be32(tb[CTA_PROTOINFO_SCTP_VTAG_ORIGINAL]); |
a258860e | 603 | ct->proto.sctp.vtag[IP_CT_DIR_REPLY] = |
5547cd0a | 604 | nla_get_be32(tb[CTA_PROTOINFO_SCTP_VTAG_REPLY]); |
440f0d58 | 605 | spin_unlock_bh(&ct->lock); |
a258860e PNA |
606 | |
607 | return 0; | |
608 | } | |
a400c30e HE |
609 | |
610 | static int sctp_nlattr_size(void) | |
611 | { | |
612 | return nla_total_size(0) /* CTA_PROTOINFO_SCTP */ | |
613 | + nla_policy_len(sctp_nla_policy, CTA_PROTOINFO_SCTP_MAX + 1); | |
614 | } | |
a258860e PNA |
615 | #endif |
616 | ||
50978462 PNA |
617 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) |
618 | ||
619 | #include <linux/netfilter/nfnetlink.h> | |
620 | #include <linux/netfilter/nfnetlink_cttimeout.h> | |
621 | ||
8264deb8 G |
622 | static int sctp_timeout_nlattr_to_obj(struct nlattr *tb[], |
623 | struct net *net, void *data) | |
50978462 PNA |
624 | { |
625 | unsigned int *timeouts = data; | |
a85406af | 626 | struct nf_sctp_net *sn = sctp_pernet(net); |
50978462 PNA |
627 | int i; |
628 | ||
629 | /* set default SCTP timeouts. */ | |
630 | for (i=0; i<SCTP_CONNTRACK_MAX; i++) | |
8264deb8 | 631 | timeouts[i] = sn->timeouts[i]; |
50978462 PNA |
632 | |
633 | /* there's a 1:1 mapping between attributes and protocol states. */ | |
634 | for (i=CTA_TIMEOUT_SCTP_UNSPEC+1; i<CTA_TIMEOUT_SCTP_MAX+1; i++) { | |
635 | if (tb[i]) { | |
636 | timeouts[i] = ntohl(nla_get_be32(tb[i])) * HZ; | |
637 | } | |
638 | } | |
639 | return 0; | |
640 | } | |
641 | ||
642 | static int | |
643 | sctp_timeout_obj_to_nlattr(struct sk_buff *skb, const void *data) | |
644 | { | |
645 | const unsigned int *timeouts = data; | |
646 | int i; | |
647 | ||
5e8d1eb5 DM |
648 | for (i=CTA_TIMEOUT_SCTP_UNSPEC+1; i<CTA_TIMEOUT_SCTP_MAX+1; i++) { |
649 | if (nla_put_be32(skb, i, htonl(timeouts[i] / HZ))) | |
650 | goto nla_put_failure; | |
651 | } | |
50978462 PNA |
652 | return 0; |
653 | ||
654 | nla_put_failure: | |
655 | return -ENOSPC; | |
656 | } | |
657 | ||
658 | static const struct nla_policy | |
659 | sctp_timeout_nla_policy[CTA_TIMEOUT_SCTP_MAX+1] = { | |
660 | [CTA_TIMEOUT_SCTP_CLOSED] = { .type = NLA_U32 }, | |
661 | [CTA_TIMEOUT_SCTP_COOKIE_WAIT] = { .type = NLA_U32 }, | |
662 | [CTA_TIMEOUT_SCTP_COOKIE_ECHOED] = { .type = NLA_U32 }, | |
663 | [CTA_TIMEOUT_SCTP_ESTABLISHED] = { .type = NLA_U32 }, | |
664 | [CTA_TIMEOUT_SCTP_SHUTDOWN_SENT] = { .type = NLA_U32 }, | |
665 | [CTA_TIMEOUT_SCTP_SHUTDOWN_RECD] = { .type = NLA_U32 }, | |
666 | [CTA_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = { .type = NLA_U32 }, | |
d7ee3519 MK |
667 | [CTA_TIMEOUT_SCTP_HEARTBEAT_SENT] = { .type = NLA_U32 }, |
668 | [CTA_TIMEOUT_SCTP_HEARTBEAT_ACKED] = { .type = NLA_U32 }, | |
50978462 PNA |
669 | }; |
670 | #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ | |
671 | ||
672 | ||
9fb9cbb1 | 673 | #ifdef CONFIG_SYSCTL |
933a41e7 | 674 | static struct ctl_table sctp_sysctl_table[] = { |
9fb9cbb1 | 675 | { |
9fb9cbb1 | 676 | .procname = "nf_conntrack_sctp_timeout_closed", |
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_cookie_wait", |
9fb9cbb1 YK |
683 | .maxlen = sizeof(unsigned int), |
684 | .mode = 0644, | |
6d9f239a | 685 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
686 | }, |
687 | { | |
9fb9cbb1 | 688 | .procname = "nf_conntrack_sctp_timeout_cookie_echoed", |
9fb9cbb1 YK |
689 | .maxlen = sizeof(unsigned int), |
690 | .mode = 0644, | |
6d9f239a | 691 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
692 | }, |
693 | { | |
9fb9cbb1 | 694 | .procname = "nf_conntrack_sctp_timeout_established", |
9fb9cbb1 YK |
695 | .maxlen = sizeof(unsigned int), |
696 | .mode = 0644, | |
6d9f239a | 697 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
698 | }, |
699 | { | |
9fb9cbb1 | 700 | .procname = "nf_conntrack_sctp_timeout_shutdown_sent", |
9fb9cbb1 YK |
701 | .maxlen = sizeof(unsigned int), |
702 | .mode = 0644, | |
6d9f239a | 703 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
704 | }, |
705 | { | |
9fb9cbb1 | 706 | .procname = "nf_conntrack_sctp_timeout_shutdown_recd", |
9fb9cbb1 YK |
707 | .maxlen = sizeof(unsigned int), |
708 | .mode = 0644, | |
6d9f239a | 709 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
710 | }, |
711 | { | |
9fb9cbb1 | 712 | .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent", |
9fb9cbb1 YK |
713 | .maxlen = sizeof(unsigned int), |
714 | .mode = 0644, | |
6d9f239a | 715 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 | 716 | }, |
d7ee3519 MK |
717 | { |
718 | .procname = "nf_conntrack_sctp_timeout_heartbeat_sent", | |
719 | .maxlen = sizeof(unsigned int), | |
720 | .mode = 0644, | |
721 | .proc_handler = proc_dointvec_jiffies, | |
722 | }, | |
723 | { | |
724 | .procname = "nf_conntrack_sctp_timeout_heartbeat_acked", | |
725 | .maxlen = sizeof(unsigned int), | |
726 | .mode = 0644, | |
727 | .proc_handler = proc_dointvec_jiffies, | |
728 | }, | |
f8572d8f | 729 | { } |
9fb9cbb1 | 730 | }; |
933a41e7 | 731 | #endif |
9fb9cbb1 | 732 | |
f42c4183 | 733 | static int sctp_kmemdup_sysctl_table(struct nf_proto_net *pn, |
a85406af | 734 | struct nf_sctp_net *sn) |
49d485a3 G |
735 | { |
736 | #ifdef CONFIG_SYSCTL | |
49d485a3 G |
737 | if (pn->ctl_table) |
738 | return 0; | |
739 | ||
740 | pn->ctl_table = kmemdup(sctp_sysctl_table, | |
741 | sizeof(sctp_sysctl_table), | |
742 | GFP_KERNEL); | |
743 | if (!pn->ctl_table) | |
744 | return -ENOMEM; | |
745 | ||
746 | pn->ctl_table[0].data = &sn->timeouts[SCTP_CONNTRACK_CLOSED]; | |
747 | pn->ctl_table[1].data = &sn->timeouts[SCTP_CONNTRACK_COOKIE_WAIT]; | |
748 | pn->ctl_table[2].data = &sn->timeouts[SCTP_CONNTRACK_COOKIE_ECHOED]; | |
749 | pn->ctl_table[3].data = &sn->timeouts[SCTP_CONNTRACK_ESTABLISHED]; | |
750 | pn->ctl_table[4].data = &sn->timeouts[SCTP_CONNTRACK_SHUTDOWN_SENT]; | |
751 | pn->ctl_table[5].data = &sn->timeouts[SCTP_CONNTRACK_SHUTDOWN_RECD]; | |
752 | pn->ctl_table[6].data = &sn->timeouts[SCTP_CONNTRACK_SHUTDOWN_ACK_SENT]; | |
d7ee3519 MK |
753 | pn->ctl_table[7].data = &sn->timeouts[SCTP_CONNTRACK_HEARTBEAT_SENT]; |
754 | pn->ctl_table[8].data = &sn->timeouts[SCTP_CONNTRACK_HEARTBEAT_ACKED]; | |
49d485a3 G |
755 | #endif |
756 | return 0; | |
757 | } | |
758 | ||
f42c4183 | 759 | static int sctp_init_net(struct net *net, u_int16_t proto) |
49d485a3 | 760 | { |
a85406af | 761 | struct nf_sctp_net *sn = sctp_pernet(net); |
f42c4183 | 762 | struct nf_proto_net *pn = &sn->pn; |
49d485a3 | 763 | |
f42c4183 G |
764 | if (!pn->users) { |
765 | int i; | |
49d485a3 | 766 | |
f42c4183 G |
767 | for (i = 0; i < SCTP_CONNTRACK_MAX; i++) |
768 | sn->timeouts[i] = sctp_timeouts[i]; | |
769 | } | |
49d485a3 | 770 | |
adf05168 | 771 | return sctp_kmemdup_sysctl_table(pn, sn); |
49d485a3 G |
772 | } |
773 | ||
a85406af | 774 | struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp4 __read_mostly = { |
933a41e7 PM |
775 | .l3proto = PF_INET, |
776 | .l4proto = IPPROTO_SCTP, | |
777 | .name = "sctp", | |
778 | .pkt_to_tuple = sctp_pkt_to_tuple, | |
779 | .invert_tuple = sctp_invert_tuple, | |
780 | .print_tuple = sctp_print_tuple, | |
781 | .print_conntrack = sctp_print_conntrack, | |
782 | .packet = sctp_packet, | |
2c8503f5 | 783 | .get_timeouts = sctp_get_timeouts, |
933a41e7 | 784 | .new = sctp_new, |
cf6e007e | 785 | .error = sctp_error, |
933a41e7 | 786 | .me = THIS_MODULE, |
c0cd1156 | 787 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK) |
a258860e | 788 | .to_nlattr = sctp_to_nlattr, |
a400c30e | 789 | .nlattr_size = sctp_nlattr_size, |
a258860e | 790 | .from_nlattr = nlattr_to_sctp, |
c7212e9d | 791 | .tuple_to_nlattr = nf_ct_port_tuple_to_nlattr, |
a400c30e | 792 | .nlattr_tuple_size = nf_ct_port_nlattr_tuple_size, |
c7212e9d PNA |
793 | .nlattr_to_tuple = nf_ct_port_nlattr_to_tuple, |
794 | .nla_policy = nf_ct_port_nla_policy, | |
795 | #endif | |
50978462 PNA |
796 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) |
797 | .ctnl_timeout = { | |
798 | .nlattr_to_obj = sctp_timeout_nlattr_to_obj, | |
799 | .obj_to_nlattr = sctp_timeout_obj_to_nlattr, | |
800 | .nlattr_max = CTA_TIMEOUT_SCTP_MAX, | |
801 | .obj_size = sizeof(unsigned int) * SCTP_CONNTRACK_MAX, | |
802 | .nla_policy = sctp_timeout_nla_policy, | |
803 | }, | |
804 | #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ | |
f42c4183 | 805 | .init_net = sctp_init_net, |
9fb9cbb1 | 806 | }; |
a85406af | 807 | EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_sctp4); |
9fb9cbb1 | 808 | |
a85406af | 809 | struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp6 __read_mostly = { |
933a41e7 PM |
810 | .l3proto = PF_INET6, |
811 | .l4proto = IPPROTO_SCTP, | |
812 | .name = "sctp", | |
813 | .pkt_to_tuple = sctp_pkt_to_tuple, | |
814 | .invert_tuple = sctp_invert_tuple, | |
815 | .print_tuple = sctp_print_tuple, | |
816 | .print_conntrack = sctp_print_conntrack, | |
817 | .packet = sctp_packet, | |
2c8503f5 | 818 | .get_timeouts = sctp_get_timeouts, |
933a41e7 | 819 | .new = sctp_new, |
cf6e007e | 820 | .error = sctp_error, |
933a41e7 | 821 | .me = THIS_MODULE, |
c0cd1156 | 822 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK) |
a258860e | 823 | .to_nlattr = sctp_to_nlattr, |
a400c30e | 824 | .nlattr_size = sctp_nlattr_size, |
a258860e | 825 | .from_nlattr = nlattr_to_sctp, |
c7212e9d | 826 | .tuple_to_nlattr = nf_ct_port_tuple_to_nlattr, |
a400c30e | 827 | .nlattr_tuple_size = nf_ct_port_nlattr_tuple_size, |
c7212e9d PNA |
828 | .nlattr_to_tuple = nf_ct_port_nlattr_to_tuple, |
829 | .nla_policy = nf_ct_port_nla_policy, | |
50978462 PNA |
830 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) |
831 | .ctnl_timeout = { | |
832 | .nlattr_to_obj = sctp_timeout_nlattr_to_obj, | |
833 | .obj_to_nlattr = sctp_timeout_obj_to_nlattr, | |
834 | .nlattr_max = CTA_TIMEOUT_SCTP_MAX, | |
835 | .obj_size = sizeof(unsigned int) * SCTP_CONNTRACK_MAX, | |
836 | .nla_policy = sctp_timeout_nla_policy, | |
837 | }, | |
838 | #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ | |
9fb9cbb1 | 839 | #endif |
f42c4183 | 840 | .init_net = sctp_init_net, |
933a41e7 | 841 | }; |
a85406af | 842 | EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_sctp6); |