Commit | Line | Data |
---|---|---|
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> | |
18 | #include <linux/module.h> | |
19 | #include <linux/in.h> | |
20 | #include <linux/ip.h> | |
21 | #include <linux/sctp.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/seq_file.h> | |
40a839fd YK |
24 | #include <linux/spinlock.h> |
25 | #include <linux/interrupt.h> | |
9fb9cbb1 YK |
26 | |
27 | #include <net/netfilter/nf_conntrack.h> | |
605dcad6 | 28 | #include <net/netfilter/nf_conntrack_l4proto.h> |
f6180121 | 29 | #include <net/netfilter/nf_conntrack_ecache.h> |
9fb9cbb1 | 30 | |
9fb9cbb1 | 31 | /* FIXME: Examine ipfilter's timeouts and conntrack transitions more |
601e68e1 | 32 | closely. They're more complex. --RR |
9fb9cbb1 YK |
33 | |
34 | And so for me for SCTP :D -Kiran */ | |
35 | ||
12c33aa2 | 36 | static const char *const sctp_conntrack_names[] = { |
9fb9cbb1 YK |
37 | "NONE", |
38 | "CLOSED", | |
39 | "COOKIE_WAIT", | |
40 | "COOKIE_ECHOED", | |
41 | "ESTABLISHED", | |
42 | "SHUTDOWN_SENT", | |
43 | "SHUTDOWN_RECD", | |
44 | "SHUTDOWN_ACK_SENT", | |
d7ee3519 MK |
45 | "HEARTBEAT_SENT", |
46 | "HEARTBEAT_ACKED", | |
9fb9cbb1 YK |
47 | }; |
48 | ||
49 | #define SECS * HZ | |
50 | #define MINS * 60 SECS | |
51 | #define HOURS * 60 MINS | |
52 | #define DAYS * 24 HOURS | |
53 | ||
86c0bf40 PM |
54 | static unsigned int sctp_timeouts[SCTP_CONNTRACK_MAX] __read_mostly = { |
55 | [SCTP_CONNTRACK_CLOSED] = 10 SECS, | |
56 | [SCTP_CONNTRACK_COOKIE_WAIT] = 3 SECS, | |
57 | [SCTP_CONNTRACK_COOKIE_ECHOED] = 3 SECS, | |
58 | [SCTP_CONNTRACK_ESTABLISHED] = 5 DAYS, | |
59 | [SCTP_CONNTRACK_SHUTDOWN_SENT] = 300 SECS / 1000, | |
60 | [SCTP_CONNTRACK_SHUTDOWN_RECD] = 300 SECS / 1000, | |
61 | [SCTP_CONNTRACK_SHUTDOWN_ACK_SENT] = 3 SECS, | |
d7ee3519 MK |
62 | [SCTP_CONNTRACK_HEARTBEAT_SENT] = 30 SECS, |
63 | [SCTP_CONNTRACK_HEARTBEAT_ACKED] = 210 SECS, | |
86c0bf40 | 64 | }; |
9fb9cbb1 YK |
65 | |
66 | #define sNO SCTP_CONNTRACK_NONE | |
67 | #define sCL SCTP_CONNTRACK_CLOSED | |
68 | #define sCW SCTP_CONNTRACK_COOKIE_WAIT | |
69 | #define sCE SCTP_CONNTRACK_COOKIE_ECHOED | |
70 | #define sES SCTP_CONNTRACK_ESTABLISHED | |
71 | #define sSS SCTP_CONNTRACK_SHUTDOWN_SENT | |
72 | #define sSR SCTP_CONNTRACK_SHUTDOWN_RECD | |
73 | #define sSA SCTP_CONNTRACK_SHUTDOWN_ACK_SENT | |
d7ee3519 MK |
74 | #define sHS SCTP_CONNTRACK_HEARTBEAT_SENT |
75 | #define sHA SCTP_CONNTRACK_HEARTBEAT_ACKED | |
9fb9cbb1 YK |
76 | #define sIV SCTP_CONNTRACK_MAX |
77 | ||
601e68e1 | 78 | /* |
9fb9cbb1 YK |
79 | These are the descriptions of the states: |
80 | ||
601e68e1 | 81 | NOTE: These state names are tantalizingly similar to the states of an |
9fb9cbb1 | 82 | SCTP endpoint. But the interpretation of the states is a little different, |
601e68e1 | 83 | considering that these are the states of the connection and not of an end |
9fb9cbb1 YK |
84 | point. Please note the subtleties. -Kiran |
85 | ||
86 | NONE - Nothing so far. | |
601e68e1 YH |
87 | COOKIE WAIT - We have seen an INIT chunk in the original direction, or also |
88 | an INIT_ACK chunk in the reply direction. | |
9fb9cbb1 YK |
89 | COOKIE ECHOED - We have seen a COOKIE_ECHO chunk in the original direction. |
90 | ESTABLISHED - We have seen a COOKIE_ACK in the reply direction. | |
91 | SHUTDOWN_SENT - We have seen a SHUTDOWN chunk in the original direction. | |
92 | SHUTDOWN_RECD - We have seen a SHUTDOWN chunk in the reply directoin. | |
93 | SHUTDOWN_ACK_SENT - We have seen a SHUTDOWN_ACK chunk in the direction opposite | |
601e68e1 YH |
94 | to that of the SHUTDOWN chunk. |
95 | CLOSED - We have seen a SHUTDOWN_COMPLETE chunk in the direction of | |
96 | the SHUTDOWN chunk. Connection is closed. | |
d7ee3519 MK |
97 | HEARTBEAT_SENT - We have seen a HEARTBEAT in a new flow. |
98 | HEARTBEAT_ACKED - We have seen a HEARTBEAT-ACK in the direction opposite to | |
99 | that of the HEARTBEAT chunk. Secondary connection is | |
100 | established. | |
9fb9cbb1 YK |
101 | */ |
102 | ||
103 | /* TODO | |
601e68e1 | 104 | - I have assumed that the first INIT is in the original direction. |
9fb9cbb1 YK |
105 | This messes things when an INIT comes in the reply direction in CLOSED |
106 | state. | |
601e68e1 | 107 | - Check the error type in the reply dir before transitioning from |
9fb9cbb1 YK |
108 | cookie echoed to closed. |
109 | - Sec 5.2.4 of RFC 2960 | |
d7ee3519 | 110 | - Full Multi Homing support. |
9fb9cbb1 YK |
111 | */ |
112 | ||
113 | /* SCTP conntrack state transitions */ | |
d7ee3519 | 114 | static const u8 sctp_conntracks[2][11][SCTP_CONNTRACK_MAX] = { |
9fb9cbb1 YK |
115 | { |
116 | /* ORIGINAL */ | |
d7ee3519 MK |
117 | /* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA, sHS, sHA */ |
118 | /* init */ {sCW, sCW, sCW, sCE, sES, sSS, sSR, sSA, sCW, sHA}, | |
119 | /* init_ack */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA, sCL, sHA}, | |
120 | /* abort */ {sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL}, | |
121 | /* shutdown */ {sCL, sCL, sCW, sCE, sSS, sSS, sSR, sSA, sCL, sSS}, | |
122 | /* shutdown_ack */ {sSA, sCL, sCW, sCE, sES, sSA, sSA, sSA, sSA, sHA}, | |
123 | /* error */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA, sCL, sHA},/* Can't have Stale cookie*/ | |
124 | /* cookie_echo */ {sCL, sCL, sCE, sCE, sES, sSS, sSR, sSA, sCL, sHA},/* 5.2.4 - Big TODO */ | |
125 | /* cookie_ack */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA, sCL, sHA},/* Can't come in orig dir */ | |
126 | /* shutdown_comp*/ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sCL, sCL, sHA}, | |
127 | /* heartbeat */ {sHS, sCL, sCW, sCE, sES, sSS, sSR, sSA, sHS, sHA}, | |
128 | /* heartbeat_ack*/ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA, sHS, sHA} | |
9fb9cbb1 YK |
129 | }, |
130 | { | |
131 | /* REPLY */ | |
d7ee3519 MK |
132 | /* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA, sHS, sHA */ |
133 | /* init */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA, sIV, sHA},/* INIT in sCL Big TODO */ | |
134 | /* init_ack */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA, sIV, sHA}, | |
135 | /* abort */ {sIV, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sIV, sCL}, | |
136 | /* shutdown */ {sIV, sCL, sCW, sCE, sSR, sSS, sSR, sSA, sIV, sSR}, | |
137 | /* shutdown_ack */ {sIV, sCL, sCW, sCE, sES, sSA, sSA, sSA, sIV, sHA}, | |
138 | /* error */ {sIV, sCL, sCW, sCL, sES, sSS, sSR, sSA, sIV, sHA}, | |
139 | /* cookie_echo */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA, sIV, sHA},/* Can't come in reply dir */ | |
140 | /* cookie_ack */ {sIV, sCL, sCW, sES, sES, sSS, sSR, sSA, sIV, sHA}, | |
141 | /* shutdown_comp*/ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sCL, sIV, sHA}, | |
142 | /* heartbeat */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA, sHS, sHA}, | |
143 | /* heartbeat_ack*/ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA, sHA, sHA} | |
9fb9cbb1 YK |
144 | } |
145 | }; | |
146 | ||
49d485a3 G |
147 | static int sctp_net_id __read_mostly; |
148 | struct sctp_net { | |
149 | struct nf_proto_net pn; | |
150 | unsigned int timeouts[SCTP_CONNTRACK_MAX]; | |
151 | }; | |
152 | ||
153 | static inline struct sctp_net *sctp_pernet(struct net *net) | |
154 | { | |
155 | return net_generic(net, sctp_net_id); | |
156 | } | |
157 | ||
09f263cd | 158 | static bool sctp_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff, |
a31f1adc | 159 | struct net *net, struct nf_conntrack_tuple *tuple) |
9fb9cbb1 | 160 | { |
12c33aa2 JE |
161 | const struct sctphdr *hp; |
162 | struct sctphdr _hdr; | |
9fb9cbb1 | 163 | |
9fb9cbb1 YK |
164 | /* Actually only need first 8 bytes. */ |
165 | hp = skb_header_pointer(skb, dataoff, 8, &_hdr); | |
166 | if (hp == NULL) | |
09f263cd | 167 | return false; |
9fb9cbb1 YK |
168 | |
169 | tuple->src.u.sctp.port = hp->source; | |
170 | tuple->dst.u.sctp.port = hp->dest; | |
09f263cd | 171 | return true; |
9fb9cbb1 YK |
172 | } |
173 | ||
09f263cd JE |
174 | static bool sctp_invert_tuple(struct nf_conntrack_tuple *tuple, |
175 | const struct nf_conntrack_tuple *orig) | |
9fb9cbb1 | 176 | { |
9fb9cbb1 YK |
177 | tuple->src.u.sctp.port = orig->dst.u.sctp.port; |
178 | tuple->dst.u.sctp.port = orig->src.u.sctp.port; | |
09f263cd | 179 | return true; |
9fb9cbb1 YK |
180 | } |
181 | ||
182 | /* Print out the per-protocol part of the tuple. */ | |
824f1fbe JP |
183 | static void sctp_print_tuple(struct seq_file *s, |
184 | const struct nf_conntrack_tuple *tuple) | |
9fb9cbb1 | 185 | { |
824f1fbe JP |
186 | seq_printf(s, "sport=%hu dport=%hu ", |
187 | ntohs(tuple->src.u.sctp.port), | |
188 | ntohs(tuple->dst.u.sctp.port)); | |
9fb9cbb1 YK |
189 | } |
190 | ||
191 | /* Print out the private part of the conntrack. */ | |
37246a58 | 192 | static void sctp_print_conntrack(struct seq_file *s, struct nf_conn *ct) |
9fb9cbb1 YK |
193 | { |
194 | enum sctp_conntrack state; | |
195 | ||
440f0d58 | 196 | spin_lock_bh(&ct->lock); |
112f35c9 | 197 | state = ct->proto.sctp.state; |
440f0d58 | 198 | spin_unlock_bh(&ct->lock); |
9fb9cbb1 | 199 | |
37246a58 | 200 | seq_printf(s, "%s ", sctp_conntrack_names[state]); |
9fb9cbb1 YK |
201 | } |
202 | ||
203 | #define for_each_sctp_chunk(skb, sch, _sch, offset, dataoff, count) \ | |
e79ec50b JE |
204 | for ((offset) = (dataoff) + sizeof(sctp_sctphdr_t), (count) = 0; \ |
205 | (offset) < (skb)->len && \ | |
206 | ((sch) = skb_header_pointer((skb), (offset), sizeof(_sch), &(_sch))); \ | |
207 | (offset) += (ntohs((sch)->length) + 3) & ~3, (count)++) | |
9fb9cbb1 YK |
208 | |
209 | /* Some validity checks to make sure the chunks are fine */ | |
112f35c9 | 210 | static int do_basic_checks(struct nf_conn *ct, |
9fb9cbb1 YK |
211 | const struct sk_buff *skb, |
212 | unsigned int dataoff, | |
35c6d3cb | 213 | unsigned long *map) |
9fb9cbb1 YK |
214 | { |
215 | u_int32_t offset, count; | |
216 | sctp_chunkhdr_t _sch, *sch; | |
217 | int flag; | |
218 | ||
9fb9cbb1 YK |
219 | flag = 0; |
220 | ||
221 | for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) { | |
0d53778e | 222 | pr_debug("Chunk Num: %d Type: %d\n", count, sch->type); |
9fb9cbb1 | 223 | |
5447d477 PM |
224 | if (sch->type == SCTP_CID_INIT || |
225 | sch->type == SCTP_CID_INIT_ACK || | |
226 | sch->type == SCTP_CID_SHUTDOWN_COMPLETE) | |
9fb9cbb1 | 227 | flag = 1; |
9fb9cbb1 | 228 | |
e17df688 PM |
229 | /* |
230 | * Cookie Ack/Echo chunks not the first OR | |
231 | * Init / Init Ack / Shutdown compl chunks not the only chunks | |
232 | * OR zero-length. | |
233 | */ | |
5447d477 PM |
234 | if (((sch->type == SCTP_CID_COOKIE_ACK || |
235 | sch->type == SCTP_CID_COOKIE_ECHO || | |
236 | flag) && | |
237 | count != 0) || !sch->length) { | |
0d53778e | 238 | pr_debug("Basic checks failed\n"); |
9fb9cbb1 YK |
239 | return 1; |
240 | } | |
241 | ||
5447d477 | 242 | if (map) |
35c6d3cb | 243 | set_bit(sch->type, map); |
9fb9cbb1 YK |
244 | } |
245 | ||
0d53778e | 246 | pr_debug("Basic checks passed\n"); |
dd7271fe | 247 | return count == 0; |
9fb9cbb1 YK |
248 | } |
249 | ||
efe9f68a PM |
250 | static int sctp_new_state(enum ip_conntrack_dir dir, |
251 | enum sctp_conntrack cur_state, | |
252 | int chunk_type) | |
9fb9cbb1 YK |
253 | { |
254 | int i; | |
255 | ||
0d53778e | 256 | pr_debug("Chunk type: %d\n", chunk_type); |
9fb9cbb1 YK |
257 | |
258 | switch (chunk_type) { | |
5447d477 PM |
259 | case SCTP_CID_INIT: |
260 | pr_debug("SCTP_CID_INIT\n"); | |
261 | i = 0; | |
262 | break; | |
263 | case SCTP_CID_INIT_ACK: | |
264 | pr_debug("SCTP_CID_INIT_ACK\n"); | |
265 | i = 1; | |
266 | break; | |
267 | case SCTP_CID_ABORT: | |
268 | pr_debug("SCTP_CID_ABORT\n"); | |
269 | i = 2; | |
270 | break; | |
271 | case SCTP_CID_SHUTDOWN: | |
272 | pr_debug("SCTP_CID_SHUTDOWN\n"); | |
273 | i = 3; | |
274 | break; | |
275 | case SCTP_CID_SHUTDOWN_ACK: | |
276 | pr_debug("SCTP_CID_SHUTDOWN_ACK\n"); | |
277 | i = 4; | |
278 | break; | |
279 | case SCTP_CID_ERROR: | |
280 | pr_debug("SCTP_CID_ERROR\n"); | |
281 | i = 5; | |
282 | break; | |
283 | case SCTP_CID_COOKIE_ECHO: | |
284 | pr_debug("SCTP_CID_COOKIE_ECHO\n"); | |
285 | i = 6; | |
286 | break; | |
287 | case SCTP_CID_COOKIE_ACK: | |
288 | pr_debug("SCTP_CID_COOKIE_ACK\n"); | |
289 | i = 7; | |
290 | break; | |
291 | case SCTP_CID_SHUTDOWN_COMPLETE: | |
292 | pr_debug("SCTP_CID_SHUTDOWN_COMPLETE\n"); | |
293 | i = 8; | |
294 | break; | |
d7ee3519 MK |
295 | case SCTP_CID_HEARTBEAT: |
296 | pr_debug("SCTP_CID_HEARTBEAT"); | |
297 | i = 9; | |
298 | break; | |
299 | case SCTP_CID_HEARTBEAT_ACK: | |
300 | pr_debug("SCTP_CID_HEARTBEAT_ACK"); | |
301 | i = 10; | |
302 | break; | |
5447d477 | 303 | default: |
d7ee3519 | 304 | /* Other chunks like DATA or SACK do not change the state */ |
5447d477 PM |
305 | pr_debug("Unknown chunk type, Will stay in %s\n", |
306 | sctp_conntrack_names[cur_state]); | |
307 | return cur_state; | |
9fb9cbb1 YK |
308 | } |
309 | ||
0d53778e PM |
310 | pr_debug("dir: %d cur_state: %s chunk_type: %d new_state: %s\n", |
311 | dir, sctp_conntrack_names[cur_state], chunk_type, | |
312 | sctp_conntrack_names[sctp_conntracks[dir][i][cur_state]]); | |
9fb9cbb1 YK |
313 | |
314 | return sctp_conntracks[dir][i][cur_state]; | |
315 | } | |
316 | ||
2c8503f5 PNA |
317 | static unsigned int *sctp_get_timeouts(struct net *net) |
318 | { | |
49d485a3 | 319 | return sctp_pernet(net)->timeouts; |
2c8503f5 PNA |
320 | } |
321 | ||
b37e933a | 322 | /* Returns verdict for packet, or -NF_ACCEPT for invalid. */ |
112f35c9 | 323 | static int sctp_packet(struct nf_conn *ct, |
9fb9cbb1 YK |
324 | const struct sk_buff *skb, |
325 | unsigned int dataoff, | |
326 | enum ip_conntrack_info ctinfo, | |
76108cea | 327 | u_int8_t pf, |
2c8503f5 PNA |
328 | unsigned int hooknum, |
329 | unsigned int *timeouts) | |
9fb9cbb1 | 330 | { |
efe9f68a | 331 | enum sctp_conntrack new_state, old_state; |
8528819a | 332 | enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo); |
12c33aa2 JE |
333 | const struct sctphdr *sh; |
334 | struct sctphdr _sctph; | |
335 | const struct sctp_chunkhdr *sch; | |
336 | struct sctp_chunkhdr _sch; | |
9fb9cbb1 | 337 | u_int32_t offset, count; |
35c6d3cb | 338 | unsigned long map[256 / sizeof(unsigned long)] = { 0 }; |
9fb9cbb1 | 339 | |
9fb9cbb1 YK |
340 | sh = skb_header_pointer(skb, dataoff, sizeof(_sctph), &_sctph); |
341 | if (sh == NULL) | |
b37e933a | 342 | goto out; |
9fb9cbb1 | 343 | |
112f35c9 | 344 | if (do_basic_checks(ct, skb, dataoff, map) != 0) |
b37e933a | 345 | goto out; |
9fb9cbb1 YK |
346 | |
347 | /* Check the verification tag (Sec 8.5) */ | |
35c6d3cb PM |
348 | if (!test_bit(SCTP_CID_INIT, map) && |
349 | !test_bit(SCTP_CID_SHUTDOWN_COMPLETE, map) && | |
350 | !test_bit(SCTP_CID_COOKIE_ECHO, map) && | |
351 | !test_bit(SCTP_CID_ABORT, map) && | |
352 | !test_bit(SCTP_CID_SHUTDOWN_ACK, map) && | |
d7ee3519 MK |
353 | !test_bit(SCTP_CID_HEARTBEAT, map) && |
354 | !test_bit(SCTP_CID_HEARTBEAT_ACK, map) && | |
8528819a | 355 | sh->vtag != ct->proto.sctp.vtag[dir]) { |
0d53778e | 356 | pr_debug("Verification tag check failed\n"); |
b37e933a | 357 | goto out; |
9fb9cbb1 YK |
358 | } |
359 | ||
328bd899 | 360 | old_state = new_state = SCTP_CONNTRACK_NONE; |
440f0d58 | 361 | spin_lock_bh(&ct->lock); |
9fb9cbb1 | 362 | for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) { |
9fb9cbb1 YK |
363 | /* Special cases of Verification tag check (Sec 8.5.1) */ |
364 | if (sch->type == SCTP_CID_INIT) { | |
365 | /* Sec 8.5.1 (A) */ | |
b37e933a PM |
366 | if (sh->vtag != 0) |
367 | goto out_unlock; | |
9fb9cbb1 YK |
368 | } else if (sch->type == SCTP_CID_ABORT) { |
369 | /* Sec 8.5.1 (B) */ | |
8528819a | 370 | if (sh->vtag != ct->proto.sctp.vtag[dir] && |
b37e933a PM |
371 | sh->vtag != ct->proto.sctp.vtag[!dir]) |
372 | goto out_unlock; | |
9fb9cbb1 YK |
373 | } else if (sch->type == SCTP_CID_SHUTDOWN_COMPLETE) { |
374 | /* Sec 8.5.1 (C) */ | |
8528819a PM |
375 | if (sh->vtag != ct->proto.sctp.vtag[dir] && |
376 | sh->vtag != ct->proto.sctp.vtag[!dir] && | |
9b1c2cfd | 377 | sch->flags & SCTP_CHUNK_FLAG_T) |
b37e933a | 378 | goto out_unlock; |
9fb9cbb1 YK |
379 | } else if (sch->type == SCTP_CID_COOKIE_ECHO) { |
380 | /* Sec 8.5.1 (D) */ | |
b37e933a PM |
381 | if (sh->vtag != ct->proto.sctp.vtag[dir]) |
382 | goto out_unlock; | |
d7ee3519 MK |
383 | } else if (sch->type == SCTP_CID_HEARTBEAT || |
384 | sch->type == SCTP_CID_HEARTBEAT_ACK) { | |
385 | if (ct->proto.sctp.vtag[dir] == 0) { | |
386 | pr_debug("Setting vtag %x for dir %d\n", | |
387 | sh->vtag, dir); | |
388 | ct->proto.sctp.vtag[dir] = sh->vtag; | |
389 | } else if (sh->vtag != ct->proto.sctp.vtag[dir]) { | |
390 | pr_debug("Verification tag check failed\n"); | |
391 | goto out_unlock; | |
392 | } | |
9fb9cbb1 YK |
393 | } |
394 | ||
efe9f68a PM |
395 | old_state = ct->proto.sctp.state; |
396 | new_state = sctp_new_state(dir, old_state, sch->type); | |
9fb9cbb1 YK |
397 | |
398 | /* Invalid */ | |
efe9f68a | 399 | if (new_state == SCTP_CONNTRACK_MAX) { |
0d53778e PM |
400 | pr_debug("nf_conntrack_sctp: Invalid dir=%i ctype=%u " |
401 | "conntrack=%u\n", | |
efe9f68a | 402 | dir, sch->type, old_state); |
b37e933a | 403 | goto out_unlock; |
9fb9cbb1 YK |
404 | } |
405 | ||
406 | /* If it is an INIT or an INIT ACK note down the vtag */ | |
5447d477 PM |
407 | if (sch->type == SCTP_CID_INIT || |
408 | sch->type == SCTP_CID_INIT_ACK) { | |
9fb9cbb1 YK |
409 | sctp_inithdr_t _inithdr, *ih; |
410 | ||
411 | ih = skb_header_pointer(skb, offset + sizeof(sctp_chunkhdr_t), | |
601e68e1 | 412 | sizeof(_inithdr), &_inithdr); |
b37e933a PM |
413 | if (ih == NULL) |
414 | goto out_unlock; | |
0d53778e | 415 | pr_debug("Setting vtag %x for dir %d\n", |
8528819a PM |
416 | ih->init_tag, !dir); |
417 | ct->proto.sctp.vtag[!dir] = ih->init_tag; | |
9fb9cbb1 YK |
418 | } |
419 | ||
efe9f68a PM |
420 | ct->proto.sctp.state = new_state; |
421 | if (old_state != new_state) | |
a71996fc | 422 | nf_conntrack_event_cache(IPCT_PROTOINFO, ct); |
9fb9cbb1 | 423 | } |
440f0d58 | 424 | spin_unlock_bh(&ct->lock); |
9fb9cbb1 | 425 | |
2c8503f5 | 426 | nf_ct_refresh_acct(ct, ctinfo, skb, timeouts[new_state]); |
9fb9cbb1 | 427 | |
efe9f68a | 428 | if (old_state == SCTP_CONNTRACK_COOKIE_ECHOED && |
8528819a | 429 | dir == IP_CT_DIR_REPLY && |
efe9f68a | 430 | new_state == SCTP_CONNTRACK_ESTABLISHED) { |
0d53778e | 431 | pr_debug("Setting assured bit\n"); |
112f35c9 | 432 | set_bit(IPS_ASSURED_BIT, &ct->status); |
858b3133 | 433 | nf_conntrack_event_cache(IPCT_ASSURED, ct); |
9fb9cbb1 YK |
434 | } |
435 | ||
436 | return NF_ACCEPT; | |
b37e933a PM |
437 | |
438 | out_unlock: | |
440f0d58 | 439 | spin_unlock_bh(&ct->lock); |
b37e933a PM |
440 | out: |
441 | return -NF_ACCEPT; | |
9fb9cbb1 YK |
442 | } |
443 | ||
444 | /* Called when a new connection for this protocol found. */ | |
09f263cd | 445 | static bool sctp_new(struct nf_conn *ct, const struct sk_buff *skb, |
2c8503f5 | 446 | unsigned int dataoff, unsigned int *timeouts) |
9fb9cbb1 | 447 | { |
efe9f68a | 448 | enum sctp_conntrack new_state; |
12c33aa2 JE |
449 | const struct sctphdr *sh; |
450 | struct sctphdr _sctph; | |
451 | const struct sctp_chunkhdr *sch; | |
452 | struct sctp_chunkhdr _sch; | |
9fb9cbb1 | 453 | u_int32_t offset, count; |
35c6d3cb | 454 | unsigned long map[256 / sizeof(unsigned long)] = { 0 }; |
9fb9cbb1 | 455 | |
9fb9cbb1 YK |
456 | sh = skb_header_pointer(skb, dataoff, sizeof(_sctph), &_sctph); |
457 | if (sh == NULL) | |
09f263cd | 458 | return false; |
9fb9cbb1 | 459 | |
112f35c9 | 460 | if (do_basic_checks(ct, skb, dataoff, map) != 0) |
09f263cd | 461 | return false; |
9fb9cbb1 YK |
462 | |
463 | /* If an OOTB packet has any of these chunks discard (Sec 8.4) */ | |
35c6d3cb PM |
464 | if (test_bit(SCTP_CID_ABORT, map) || |
465 | test_bit(SCTP_CID_SHUTDOWN_COMPLETE, map) || | |
466 | test_bit(SCTP_CID_COOKIE_ACK, map)) | |
09f263cd | 467 | return false; |
9fb9cbb1 | 468 | |
e5fc9e7a | 469 | memset(&ct->proto.sctp, 0, sizeof(ct->proto.sctp)); |
efe9f68a | 470 | new_state = SCTP_CONNTRACK_MAX; |
9fb9cbb1 YK |
471 | for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) { |
472 | /* Don't need lock here: this conntrack not in circulation yet */ | |
efe9f68a PM |
473 | new_state = sctp_new_state(IP_CT_DIR_ORIGINAL, |
474 | SCTP_CONNTRACK_NONE, sch->type); | |
9fb9cbb1 YK |
475 | |
476 | /* Invalid: delete conntrack */ | |
efe9f68a PM |
477 | if (new_state == SCTP_CONNTRACK_NONE || |
478 | new_state == SCTP_CONNTRACK_MAX) { | |
0d53778e | 479 | pr_debug("nf_conntrack_sctp: invalid new deleting.\n"); |
09f263cd | 480 | return false; |
9fb9cbb1 YK |
481 | } |
482 | ||
483 | /* Copy the vtag into the state info */ | |
484 | if (sch->type == SCTP_CID_INIT) { | |
485 | if (sh->vtag == 0) { | |
486 | sctp_inithdr_t _inithdr, *ih; | |
487 | ||
488 | ih = skb_header_pointer(skb, offset + sizeof(sctp_chunkhdr_t), | |
601e68e1 | 489 | sizeof(_inithdr), &_inithdr); |
9fb9cbb1 | 490 | if (ih == NULL) |
09f263cd | 491 | return false; |
9fb9cbb1 | 492 | |
0d53778e PM |
493 | pr_debug("Setting vtag %x for new conn\n", |
494 | ih->init_tag); | |
9fb9cbb1 | 495 | |
112f35c9 | 496 | ct->proto.sctp.vtag[IP_CT_DIR_REPLY] = |
9fb9cbb1 YK |
497 | ih->init_tag; |
498 | } else { | |
499 | /* Sec 8.5.1 (A) */ | |
09f263cd | 500 | return false; |
9fb9cbb1 | 501 | } |
d7ee3519 MK |
502 | } else if (sch->type == SCTP_CID_HEARTBEAT) { |
503 | pr_debug("Setting vtag %x for secondary conntrack\n", | |
504 | sh->vtag); | |
505 | ct->proto.sctp.vtag[IP_CT_DIR_ORIGINAL] = sh->vtag; | |
9fb9cbb1 YK |
506 | } |
507 | /* If it is a shutdown ack OOTB packet, we expect a return | |
508 | shutdown complete, otherwise an ABORT Sec 8.4 (5) and (8) */ | |
509 | else { | |
0d53778e PM |
510 | pr_debug("Setting vtag %x for new conn OOTB\n", |
511 | sh->vtag); | |
112f35c9 | 512 | ct->proto.sctp.vtag[IP_CT_DIR_REPLY] = sh->vtag; |
9fb9cbb1 YK |
513 | } |
514 | ||
efe9f68a | 515 | ct->proto.sctp.state = new_state; |
9fb9cbb1 YK |
516 | } |
517 | ||
09f263cd | 518 | return true; |
9fb9cbb1 YK |
519 | } |
520 | ||
c0cd1156 | 521 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK) |
a258860e PNA |
522 | |
523 | #include <linux/netfilter/nfnetlink.h> | |
524 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
525 | ||
526 | static int sctp_to_nlattr(struct sk_buff *skb, struct nlattr *nla, | |
440f0d58 | 527 | struct nf_conn *ct) |
a258860e PNA |
528 | { |
529 | struct nlattr *nest_parms; | |
530 | ||
440f0d58 | 531 | spin_lock_bh(&ct->lock); |
a258860e PNA |
532 | nest_parms = nla_nest_start(skb, CTA_PROTOINFO_SCTP | NLA_F_NESTED); |
533 | if (!nest_parms) | |
534 | goto nla_put_failure; | |
535 | ||
5e8d1eb5 DM |
536 | if (nla_put_u8(skb, CTA_PROTOINFO_SCTP_STATE, ct->proto.sctp.state) || |
537 | nla_put_be32(skb, CTA_PROTOINFO_SCTP_VTAG_ORIGINAL, | |
538 | ct->proto.sctp.vtag[IP_CT_DIR_ORIGINAL]) || | |
539 | nla_put_be32(skb, CTA_PROTOINFO_SCTP_VTAG_REPLY, | |
540 | ct->proto.sctp.vtag[IP_CT_DIR_REPLY])) | |
541 | goto nla_put_failure; | |
a258860e | 542 | |
440f0d58 | 543 | spin_unlock_bh(&ct->lock); |
a258860e PNA |
544 | |
545 | nla_nest_end(skb, nest_parms); | |
546 | ||
547 | return 0; | |
548 | ||
549 | nla_put_failure: | |
440f0d58 | 550 | spin_unlock_bh(&ct->lock); |
a258860e PNA |
551 | return -1; |
552 | } | |
553 | ||
554 | static const struct nla_policy sctp_nla_policy[CTA_PROTOINFO_SCTP_MAX+1] = { | |
555 | [CTA_PROTOINFO_SCTP_STATE] = { .type = NLA_U8 }, | |
556 | [CTA_PROTOINFO_SCTP_VTAG_ORIGINAL] = { .type = NLA_U32 }, | |
557 | [CTA_PROTOINFO_SCTP_VTAG_REPLY] = { .type = NLA_U32 }, | |
558 | }; | |
559 | ||
560 | static int nlattr_to_sctp(struct nlattr *cda[], struct nf_conn *ct) | |
561 | { | |
562 | struct nlattr *attr = cda[CTA_PROTOINFO_SCTP]; | |
563 | struct nlattr *tb[CTA_PROTOINFO_SCTP_MAX+1]; | |
564 | int err; | |
565 | ||
566 | /* updates may not contain the internal protocol info, skip parsing */ | |
567 | if (!attr) | |
568 | return 0; | |
569 | ||
570 | err = nla_parse_nested(tb, | |
571 | CTA_PROTOINFO_SCTP_MAX, | |
572 | attr, | |
573 | sctp_nla_policy); | |
574 | if (err < 0) | |
575 | return err; | |
576 | ||
577 | if (!tb[CTA_PROTOINFO_SCTP_STATE] || | |
578 | !tb[CTA_PROTOINFO_SCTP_VTAG_ORIGINAL] || | |
579 | !tb[CTA_PROTOINFO_SCTP_VTAG_REPLY]) | |
580 | return -EINVAL; | |
581 | ||
440f0d58 | 582 | spin_lock_bh(&ct->lock); |
a258860e PNA |
583 | ct->proto.sctp.state = nla_get_u8(tb[CTA_PROTOINFO_SCTP_STATE]); |
584 | ct->proto.sctp.vtag[IP_CT_DIR_ORIGINAL] = | |
5547cd0a | 585 | nla_get_be32(tb[CTA_PROTOINFO_SCTP_VTAG_ORIGINAL]); |
a258860e | 586 | ct->proto.sctp.vtag[IP_CT_DIR_REPLY] = |
5547cd0a | 587 | nla_get_be32(tb[CTA_PROTOINFO_SCTP_VTAG_REPLY]); |
440f0d58 | 588 | spin_unlock_bh(&ct->lock); |
a258860e PNA |
589 | |
590 | return 0; | |
591 | } | |
a400c30e HE |
592 | |
593 | static int sctp_nlattr_size(void) | |
594 | { | |
595 | return nla_total_size(0) /* CTA_PROTOINFO_SCTP */ | |
596 | + nla_policy_len(sctp_nla_policy, CTA_PROTOINFO_SCTP_MAX + 1); | |
597 | } | |
a258860e PNA |
598 | #endif |
599 | ||
50978462 PNA |
600 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) |
601 | ||
602 | #include <linux/netfilter/nfnetlink.h> | |
603 | #include <linux/netfilter/nfnetlink_cttimeout.h> | |
604 | ||
8264deb8 G |
605 | static int sctp_timeout_nlattr_to_obj(struct nlattr *tb[], |
606 | struct net *net, void *data) | |
50978462 PNA |
607 | { |
608 | unsigned int *timeouts = data; | |
8264deb8 | 609 | struct sctp_net *sn = sctp_pernet(net); |
50978462 PNA |
610 | int i; |
611 | ||
612 | /* set default SCTP timeouts. */ | |
613 | for (i=0; i<SCTP_CONNTRACK_MAX; i++) | |
8264deb8 | 614 | timeouts[i] = sn->timeouts[i]; |
50978462 PNA |
615 | |
616 | /* there's a 1:1 mapping between attributes and protocol states. */ | |
617 | for (i=CTA_TIMEOUT_SCTP_UNSPEC+1; i<CTA_TIMEOUT_SCTP_MAX+1; i++) { | |
618 | if (tb[i]) { | |
619 | timeouts[i] = ntohl(nla_get_be32(tb[i])) * HZ; | |
620 | } | |
621 | } | |
622 | return 0; | |
623 | } | |
624 | ||
625 | static int | |
626 | sctp_timeout_obj_to_nlattr(struct sk_buff *skb, const void *data) | |
627 | { | |
628 | const unsigned int *timeouts = data; | |
629 | int i; | |
630 | ||
5e8d1eb5 DM |
631 | for (i=CTA_TIMEOUT_SCTP_UNSPEC+1; i<CTA_TIMEOUT_SCTP_MAX+1; i++) { |
632 | if (nla_put_be32(skb, i, htonl(timeouts[i] / HZ))) | |
633 | goto nla_put_failure; | |
634 | } | |
50978462 PNA |
635 | return 0; |
636 | ||
637 | nla_put_failure: | |
638 | return -ENOSPC; | |
639 | } | |
640 | ||
641 | static const struct nla_policy | |
642 | sctp_timeout_nla_policy[CTA_TIMEOUT_SCTP_MAX+1] = { | |
643 | [CTA_TIMEOUT_SCTP_CLOSED] = { .type = NLA_U32 }, | |
644 | [CTA_TIMEOUT_SCTP_COOKIE_WAIT] = { .type = NLA_U32 }, | |
645 | [CTA_TIMEOUT_SCTP_COOKIE_ECHOED] = { .type = NLA_U32 }, | |
646 | [CTA_TIMEOUT_SCTP_ESTABLISHED] = { .type = NLA_U32 }, | |
647 | [CTA_TIMEOUT_SCTP_SHUTDOWN_SENT] = { .type = NLA_U32 }, | |
648 | [CTA_TIMEOUT_SCTP_SHUTDOWN_RECD] = { .type = NLA_U32 }, | |
649 | [CTA_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = { .type = NLA_U32 }, | |
d7ee3519 MK |
650 | [CTA_TIMEOUT_SCTP_HEARTBEAT_SENT] = { .type = NLA_U32 }, |
651 | [CTA_TIMEOUT_SCTP_HEARTBEAT_ACKED] = { .type = NLA_U32 }, | |
50978462 PNA |
652 | }; |
653 | #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ | |
654 | ||
655 | ||
9fb9cbb1 | 656 | #ifdef CONFIG_SYSCTL |
933a41e7 | 657 | static struct ctl_table sctp_sysctl_table[] = { |
9fb9cbb1 | 658 | { |
9fb9cbb1 | 659 | .procname = "nf_conntrack_sctp_timeout_closed", |
9fb9cbb1 YK |
660 | .maxlen = sizeof(unsigned int), |
661 | .mode = 0644, | |
6d9f239a | 662 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
663 | }, |
664 | { | |
9fb9cbb1 | 665 | .procname = "nf_conntrack_sctp_timeout_cookie_wait", |
9fb9cbb1 YK |
666 | .maxlen = sizeof(unsigned int), |
667 | .mode = 0644, | |
6d9f239a | 668 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
669 | }, |
670 | { | |
9fb9cbb1 | 671 | .procname = "nf_conntrack_sctp_timeout_cookie_echoed", |
9fb9cbb1 YK |
672 | .maxlen = sizeof(unsigned int), |
673 | .mode = 0644, | |
6d9f239a | 674 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
675 | }, |
676 | { | |
9fb9cbb1 | 677 | .procname = "nf_conntrack_sctp_timeout_established", |
9fb9cbb1 YK |
678 | .maxlen = sizeof(unsigned int), |
679 | .mode = 0644, | |
6d9f239a | 680 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
681 | }, |
682 | { | |
9fb9cbb1 | 683 | .procname = "nf_conntrack_sctp_timeout_shutdown_sent", |
9fb9cbb1 YK |
684 | .maxlen = sizeof(unsigned int), |
685 | .mode = 0644, | |
6d9f239a | 686 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
687 | }, |
688 | { | |
9fb9cbb1 | 689 | .procname = "nf_conntrack_sctp_timeout_shutdown_recd", |
9fb9cbb1 YK |
690 | .maxlen = sizeof(unsigned int), |
691 | .mode = 0644, | |
6d9f239a | 692 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 YK |
693 | }, |
694 | { | |
9fb9cbb1 | 695 | .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent", |
9fb9cbb1 YK |
696 | .maxlen = sizeof(unsigned int), |
697 | .mode = 0644, | |
6d9f239a | 698 | .proc_handler = proc_dointvec_jiffies, |
9fb9cbb1 | 699 | }, |
d7ee3519 MK |
700 | { |
701 | .procname = "nf_conntrack_sctp_timeout_heartbeat_sent", | |
702 | .maxlen = sizeof(unsigned int), | |
703 | .mode = 0644, | |
704 | .proc_handler = proc_dointvec_jiffies, | |
705 | }, | |
706 | { | |
707 | .procname = "nf_conntrack_sctp_timeout_heartbeat_acked", | |
708 | .maxlen = sizeof(unsigned int), | |
709 | .mode = 0644, | |
710 | .proc_handler = proc_dointvec_jiffies, | |
711 | }, | |
f8572d8f | 712 | { } |
9fb9cbb1 | 713 | }; |
a999e683 PM |
714 | |
715 | #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT | |
716 | static struct ctl_table sctp_compat_sysctl_table[] = { | |
717 | { | |
a999e683 | 718 | .procname = "ip_conntrack_sctp_timeout_closed", |
a999e683 PM |
719 | .maxlen = sizeof(unsigned int), |
720 | .mode = 0644, | |
6d9f239a | 721 | .proc_handler = proc_dointvec_jiffies, |
a999e683 PM |
722 | }, |
723 | { | |
a999e683 | 724 | .procname = "ip_conntrack_sctp_timeout_cookie_wait", |
a999e683 PM |
725 | .maxlen = sizeof(unsigned int), |
726 | .mode = 0644, | |
6d9f239a | 727 | .proc_handler = proc_dointvec_jiffies, |
a999e683 PM |
728 | }, |
729 | { | |
a999e683 | 730 | .procname = "ip_conntrack_sctp_timeout_cookie_echoed", |
a999e683 PM |
731 | .maxlen = sizeof(unsigned int), |
732 | .mode = 0644, | |
6d9f239a | 733 | .proc_handler = proc_dointvec_jiffies, |
a999e683 PM |
734 | }, |
735 | { | |
a999e683 | 736 | .procname = "ip_conntrack_sctp_timeout_established", |
a999e683 PM |
737 | .maxlen = sizeof(unsigned int), |
738 | .mode = 0644, | |
6d9f239a | 739 | .proc_handler = proc_dointvec_jiffies, |
a999e683 PM |
740 | }, |
741 | { | |
a999e683 | 742 | .procname = "ip_conntrack_sctp_timeout_shutdown_sent", |
a999e683 PM |
743 | .maxlen = sizeof(unsigned int), |
744 | .mode = 0644, | |
6d9f239a | 745 | .proc_handler = proc_dointvec_jiffies, |
a999e683 PM |
746 | }, |
747 | { | |
a999e683 | 748 | .procname = "ip_conntrack_sctp_timeout_shutdown_recd", |
a999e683 PM |
749 | .maxlen = sizeof(unsigned int), |
750 | .mode = 0644, | |
6d9f239a | 751 | .proc_handler = proc_dointvec_jiffies, |
a999e683 PM |
752 | }, |
753 | { | |
a999e683 | 754 | .procname = "ip_conntrack_sctp_timeout_shutdown_ack_sent", |
a999e683 PM |
755 | .maxlen = sizeof(unsigned int), |
756 | .mode = 0644, | |
6d9f239a | 757 | .proc_handler = proc_dointvec_jiffies, |
a999e683 | 758 | }, |
f8572d8f | 759 | { } |
a999e683 PM |
760 | }; |
761 | #endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */ | |
933a41e7 | 762 | #endif |
9fb9cbb1 | 763 | |
f42c4183 G |
764 | static int sctp_kmemdup_sysctl_table(struct nf_proto_net *pn, |
765 | struct sctp_net *sn) | |
49d485a3 G |
766 | { |
767 | #ifdef CONFIG_SYSCTL | |
49d485a3 G |
768 | if (pn->ctl_table) |
769 | return 0; | |
770 | ||
771 | pn->ctl_table = kmemdup(sctp_sysctl_table, | |
772 | sizeof(sctp_sysctl_table), | |
773 | GFP_KERNEL); | |
774 | if (!pn->ctl_table) | |
775 | return -ENOMEM; | |
776 | ||
777 | pn->ctl_table[0].data = &sn->timeouts[SCTP_CONNTRACK_CLOSED]; | |
778 | pn->ctl_table[1].data = &sn->timeouts[SCTP_CONNTRACK_COOKIE_WAIT]; | |
779 | pn->ctl_table[2].data = &sn->timeouts[SCTP_CONNTRACK_COOKIE_ECHOED]; | |
780 | pn->ctl_table[3].data = &sn->timeouts[SCTP_CONNTRACK_ESTABLISHED]; | |
781 | pn->ctl_table[4].data = &sn->timeouts[SCTP_CONNTRACK_SHUTDOWN_SENT]; | |
782 | pn->ctl_table[5].data = &sn->timeouts[SCTP_CONNTRACK_SHUTDOWN_RECD]; | |
783 | pn->ctl_table[6].data = &sn->timeouts[SCTP_CONNTRACK_SHUTDOWN_ACK_SENT]; | |
d7ee3519 MK |
784 | pn->ctl_table[7].data = &sn->timeouts[SCTP_CONNTRACK_HEARTBEAT_SENT]; |
785 | pn->ctl_table[8].data = &sn->timeouts[SCTP_CONNTRACK_HEARTBEAT_ACKED]; | |
49d485a3 G |
786 | #endif |
787 | return 0; | |
788 | } | |
789 | ||
f42c4183 G |
790 | static int sctp_kmemdup_compat_sysctl_table(struct nf_proto_net *pn, |
791 | struct sctp_net *sn) | |
49d485a3 G |
792 | { |
793 | #ifdef CONFIG_SYSCTL | |
794 | #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT | |
49d485a3 G |
795 | pn->ctl_compat_table = kmemdup(sctp_compat_sysctl_table, |
796 | sizeof(sctp_compat_sysctl_table), | |
797 | GFP_KERNEL); | |
798 | if (!pn->ctl_compat_table) | |
799 | return -ENOMEM; | |
800 | ||
801 | pn->ctl_compat_table[0].data = &sn->timeouts[SCTP_CONNTRACK_CLOSED]; | |
802 | pn->ctl_compat_table[1].data = &sn->timeouts[SCTP_CONNTRACK_COOKIE_WAIT]; | |
803 | pn->ctl_compat_table[2].data = &sn->timeouts[SCTP_CONNTRACK_COOKIE_ECHOED]; | |
804 | pn->ctl_compat_table[3].data = &sn->timeouts[SCTP_CONNTRACK_ESTABLISHED]; | |
805 | pn->ctl_compat_table[4].data = &sn->timeouts[SCTP_CONNTRACK_SHUTDOWN_SENT]; | |
806 | pn->ctl_compat_table[5].data = &sn->timeouts[SCTP_CONNTRACK_SHUTDOWN_RECD]; | |
807 | pn->ctl_compat_table[6].data = &sn->timeouts[SCTP_CONNTRACK_SHUTDOWN_ACK_SENT]; | |
808 | #endif | |
809 | #endif | |
810 | return 0; | |
811 | } | |
812 | ||
f42c4183 | 813 | static int sctp_init_net(struct net *net, u_int16_t proto) |
49d485a3 G |
814 | { |
815 | int ret; | |
816 | struct sctp_net *sn = sctp_pernet(net); | |
f42c4183 | 817 | struct nf_proto_net *pn = &sn->pn; |
49d485a3 | 818 | |
f42c4183 G |
819 | if (!pn->users) { |
820 | int i; | |
49d485a3 | 821 | |
f42c4183 G |
822 | for (i = 0; i < SCTP_CONNTRACK_MAX; i++) |
823 | sn->timeouts[i] = sctp_timeouts[i]; | |
824 | } | |
49d485a3 | 825 | |
f42c4183 G |
826 | if (proto == AF_INET) { |
827 | ret = sctp_kmemdup_compat_sysctl_table(pn, sn); | |
828 | if (ret < 0) | |
829 | return ret; | |
49d485a3 | 830 | |
f42c4183 G |
831 | ret = sctp_kmemdup_sysctl_table(pn, sn); |
832 | if (ret < 0) | |
833 | nf_ct_kfree_compat_sysctl_table(pn); | |
834 | } else | |
835 | ret = sctp_kmemdup_sysctl_table(pn, sn); | |
49d485a3 | 836 | |
49d485a3 G |
837 | return ret; |
838 | } | |
839 | ||
61075af5 | 840 | static struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp4 __read_mostly = { |
933a41e7 PM |
841 | .l3proto = PF_INET, |
842 | .l4proto = IPPROTO_SCTP, | |
843 | .name = "sctp", | |
844 | .pkt_to_tuple = sctp_pkt_to_tuple, | |
845 | .invert_tuple = sctp_invert_tuple, | |
846 | .print_tuple = sctp_print_tuple, | |
847 | .print_conntrack = sctp_print_conntrack, | |
848 | .packet = sctp_packet, | |
2c8503f5 | 849 | .get_timeouts = sctp_get_timeouts, |
933a41e7 PM |
850 | .new = sctp_new, |
851 | .me = THIS_MODULE, | |
c0cd1156 | 852 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK) |
a258860e | 853 | .to_nlattr = sctp_to_nlattr, |
a400c30e | 854 | .nlattr_size = sctp_nlattr_size, |
a258860e | 855 | .from_nlattr = nlattr_to_sctp, |
c7212e9d | 856 | .tuple_to_nlattr = nf_ct_port_tuple_to_nlattr, |
a400c30e | 857 | .nlattr_tuple_size = nf_ct_port_nlattr_tuple_size, |
c7212e9d PNA |
858 | .nlattr_to_tuple = nf_ct_port_nlattr_to_tuple, |
859 | .nla_policy = nf_ct_port_nla_policy, | |
860 | #endif | |
50978462 PNA |
861 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) |
862 | .ctnl_timeout = { | |
863 | .nlattr_to_obj = sctp_timeout_nlattr_to_obj, | |
864 | .obj_to_nlattr = sctp_timeout_obj_to_nlattr, | |
865 | .nlattr_max = CTA_TIMEOUT_SCTP_MAX, | |
866 | .obj_size = sizeof(unsigned int) * SCTP_CONNTRACK_MAX, | |
867 | .nla_policy = sctp_timeout_nla_policy, | |
868 | }, | |
869 | #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ | |
49d485a3 | 870 | .net_id = &sctp_net_id, |
f42c4183 | 871 | .init_net = sctp_init_net, |
9fb9cbb1 YK |
872 | }; |
873 | ||
61075af5 | 874 | static struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp6 __read_mostly = { |
933a41e7 PM |
875 | .l3proto = PF_INET6, |
876 | .l4proto = IPPROTO_SCTP, | |
877 | .name = "sctp", | |
878 | .pkt_to_tuple = sctp_pkt_to_tuple, | |
879 | .invert_tuple = sctp_invert_tuple, | |
880 | .print_tuple = sctp_print_tuple, | |
881 | .print_conntrack = sctp_print_conntrack, | |
882 | .packet = sctp_packet, | |
2c8503f5 | 883 | .get_timeouts = sctp_get_timeouts, |
933a41e7 PM |
884 | .new = sctp_new, |
885 | .me = THIS_MODULE, | |
c0cd1156 | 886 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK) |
a258860e | 887 | .to_nlattr = sctp_to_nlattr, |
a400c30e | 888 | .nlattr_size = sctp_nlattr_size, |
a258860e | 889 | .from_nlattr = nlattr_to_sctp, |
c7212e9d | 890 | .tuple_to_nlattr = nf_ct_port_tuple_to_nlattr, |
a400c30e | 891 | .nlattr_tuple_size = nf_ct_port_nlattr_tuple_size, |
c7212e9d PNA |
892 | .nlattr_to_tuple = nf_ct_port_nlattr_to_tuple, |
893 | .nla_policy = nf_ct_port_nla_policy, | |
50978462 PNA |
894 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) |
895 | .ctnl_timeout = { | |
896 | .nlattr_to_obj = sctp_timeout_nlattr_to_obj, | |
897 | .obj_to_nlattr = sctp_timeout_obj_to_nlattr, | |
898 | .nlattr_max = CTA_TIMEOUT_SCTP_MAX, | |
899 | .obj_size = sizeof(unsigned int) * SCTP_CONNTRACK_MAX, | |
900 | .nla_policy = sctp_timeout_nla_policy, | |
901 | }, | |
902 | #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ | |
9fb9cbb1 | 903 | #endif |
49d485a3 | 904 | .net_id = &sctp_net_id, |
f42c4183 | 905 | .init_net = sctp_init_net, |
933a41e7 | 906 | }; |
9fb9cbb1 | 907 | |
49d485a3 | 908 | static int sctp_net_init(struct net *net) |
9fb9cbb1 | 909 | { |
49d485a3 | 910 | int ret = 0; |
9fb9cbb1 | 911 | |
c296bb4d | 912 | ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_sctp4); |
49d485a3 | 913 | if (ret < 0) { |
c296bb4d | 914 | pr_err("nf_conntrack_sctp4: pernet registration failed.\n"); |
9fb9cbb1 YK |
915 | goto out; |
916 | } | |
c296bb4d | 917 | ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_sctp6); |
49d485a3 | 918 | if (ret < 0) { |
c296bb4d | 919 | pr_err("nf_conntrack_sctp6: pernet registration failed.\n"); |
9fb9cbb1 YK |
920 | goto cleanup_sctp4; |
921 | } | |
49d485a3 | 922 | return 0; |
9fb9cbb1 | 923 | |
49d485a3 | 924 | cleanup_sctp4: |
c296bb4d | 925 | nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_sctp4); |
49d485a3 | 926 | out: |
9fb9cbb1 | 927 | return ret; |
49d485a3 | 928 | } |
9fb9cbb1 | 929 | |
49d485a3 G |
930 | static void sctp_net_exit(struct net *net) |
931 | { | |
c296bb4d G |
932 | nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_sctp6); |
933 | nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_sctp4); | |
49d485a3 G |
934 | } |
935 | ||
936 | static struct pernet_operations sctp_net_ops = { | |
937 | .init = sctp_net_init, | |
938 | .exit = sctp_net_exit, | |
939 | .id = &sctp_net_id, | |
940 | .size = sizeof(struct sctp_net), | |
941 | }; | |
942 | ||
943 | static int __init nf_conntrack_proto_sctp_init(void) | |
944 | { | |
c296bb4d G |
945 | int ret; |
946 | ||
0d98da5d G |
947 | ret = register_pernet_subsys(&sctp_net_ops); |
948 | if (ret < 0) | |
949 | goto out_pernet; | |
950 | ||
c296bb4d G |
951 | ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_sctp4); |
952 | if (ret < 0) | |
953 | goto out_sctp4; | |
954 | ||
955 | ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_sctp6); | |
956 | if (ret < 0) | |
957 | goto out_sctp6; | |
958 | ||
c296bb4d | 959 | return 0; |
c296bb4d G |
960 | out_sctp6: |
961 | nf_ct_l4proto_unregister(&nf_conntrack_l4proto_sctp4); | |
962 | out_sctp4: | |
0d98da5d G |
963 | unregister_pernet_subsys(&sctp_net_ops); |
964 | out_pernet: | |
c296bb4d | 965 | return ret; |
9fb9cbb1 YK |
966 | } |
967 | ||
2f0d2f10 | 968 | static void __exit nf_conntrack_proto_sctp_fini(void) |
9fb9cbb1 | 969 | { |
c296bb4d G |
970 | nf_ct_l4proto_unregister(&nf_conntrack_l4proto_sctp6); |
971 | nf_ct_l4proto_unregister(&nf_conntrack_l4proto_sctp4); | |
49d485a3 | 972 | unregister_pernet_subsys(&sctp_net_ops); |
9fb9cbb1 YK |
973 | } |
974 | ||
65b4b4e8 AM |
975 | module_init(nf_conntrack_proto_sctp_init); |
976 | module_exit(nf_conntrack_proto_sctp_fini); | |
9fb9cbb1 YK |
977 | |
978 | MODULE_LICENSE("GPL"); | |
979 | MODULE_AUTHOR("Kiran Kumar Immidi"); | |
980 | MODULE_DESCRIPTION("Netfilter connection tracking protocol helper for SCTP"); | |
d2483dde | 981 | MODULE_ALIAS("ip_conntrack_proto_sctp"); |