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2bc78049 PM |
1 | /* |
2 | * DCCP connection tracking protocol helper | |
3 | * | |
4 | * Copyright (c) 2005, 2006, 2008 Patrick McHardy <kaber@trash.net> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | */ | |
11 | #include <linux/kernel.h> | |
2bc78049 PM |
12 | #include <linux/init.h> |
13 | #include <linux/sysctl.h> | |
14 | #include <linux/spinlock.h> | |
15 | #include <linux/skbuff.h> | |
16 | #include <linux/dccp.h> | |
5a0e3ad6 | 17 | #include <linux/slab.h> |
2bc78049 | 18 | |
1546000f CG |
19 | #include <net/net_namespace.h> |
20 | #include <net/netns/generic.h> | |
21 | ||
2bc78049 PM |
22 | #include <linux/netfilter/nfnetlink_conntrack.h> |
23 | #include <net/netfilter/nf_conntrack.h> | |
24 | #include <net/netfilter/nf_conntrack_l4proto.h> | |
b38b1f61 | 25 | #include <net/netfilter/nf_conntrack_ecache.h> |
2bc78049 PM |
26 | #include <net/netfilter/nf_log.h> |
27 | ||
2bc78049 PM |
28 | /* Timeouts are based on values from RFC4340: |
29 | * | |
30 | * - REQUEST: | |
31 | * | |
32 | * 8.1.2. Client Request | |
33 | * | |
34 | * A client MAY give up on its DCCP-Requests after some time | |
35 | * (3 minutes, for example). | |
36 | * | |
37 | * - RESPOND: | |
38 | * | |
39 | * 8.1.3. Server Response | |
40 | * | |
41 | * It MAY also leave the RESPOND state for CLOSED after a timeout of | |
42 | * not less than 4MSL (8 minutes); | |
43 | * | |
44 | * - PARTOPEN: | |
45 | * | |
46 | * 8.1.5. Handshake Completion | |
47 | * | |
48 | * If the client remains in PARTOPEN for more than 4MSL (8 minutes), | |
49 | * it SHOULD reset the connection with Reset Code 2, "Aborted". | |
50 | * | |
51 | * - OPEN: | |
52 | * | |
53 | * The DCCP timestamp overflows after 11.9 hours. If the connection | |
54 | * stays idle this long the sequence number won't be recognized | |
55 | * as valid anymore. | |
56 | * | |
57 | * - CLOSEREQ/CLOSING: | |
58 | * | |
59 | * 8.3. Termination | |
60 | * | |
61 | * The retransmission timer should initially be set to go off in two | |
62 | * round-trip times and should back off to not less than once every | |
63 | * 64 seconds ... | |
64 | * | |
65 | * - TIMEWAIT: | |
66 | * | |
67 | * 4.3. States | |
68 | * | |
69 | * A server or client socket remains in this state for 2MSL (4 minutes) | |
70 | * after the connection has been town down, ... | |
71 | */ | |
72 | ||
73 | #define DCCP_MSL (2 * 60 * HZ) | |
74 | ||
2bc78049 PM |
75 | static const char * const dccp_state_names[] = { |
76 | [CT_DCCP_NONE] = "NONE", | |
77 | [CT_DCCP_REQUEST] = "REQUEST", | |
78 | [CT_DCCP_RESPOND] = "RESPOND", | |
79 | [CT_DCCP_PARTOPEN] = "PARTOPEN", | |
80 | [CT_DCCP_OPEN] = "OPEN", | |
81 | [CT_DCCP_CLOSEREQ] = "CLOSEREQ", | |
82 | [CT_DCCP_CLOSING] = "CLOSING", | |
83 | [CT_DCCP_TIMEWAIT] = "TIMEWAIT", | |
84 | [CT_DCCP_IGNORE] = "IGNORE", | |
85 | [CT_DCCP_INVALID] = "INVALID", | |
86 | }; | |
87 | ||
88 | #define sNO CT_DCCP_NONE | |
89 | #define sRQ CT_DCCP_REQUEST | |
90 | #define sRS CT_DCCP_RESPOND | |
91 | #define sPO CT_DCCP_PARTOPEN | |
92 | #define sOP CT_DCCP_OPEN | |
93 | #define sCR CT_DCCP_CLOSEREQ | |
94 | #define sCG CT_DCCP_CLOSING | |
95 | #define sTW CT_DCCP_TIMEWAIT | |
96 | #define sIG CT_DCCP_IGNORE | |
97 | #define sIV CT_DCCP_INVALID | |
98 | ||
99 | /* | |
25985edc | 100 | * DCCP state transition table |
2bc78049 PM |
101 | * |
102 | * The assumption is the same as for TCP tracking: | |
103 | * | |
104 | * We are the man in the middle. All the packets go through us but might | |
105 | * get lost in transit to the destination. It is assumed that the destination | |
106 | * can't receive segments we haven't seen. | |
107 | * | |
108 | * The following states exist: | |
109 | * | |
110 | * NONE: Initial state, expecting Request | |
111 | * REQUEST: Request seen, waiting for Response from server | |
112 | * RESPOND: Response from server seen, waiting for Ack from client | |
113 | * PARTOPEN: Ack after Response seen, waiting for packet other than Response, | |
114 | * Reset or Sync from server | |
115 | * OPEN: Packet other than Response, Reset or Sync seen | |
116 | * CLOSEREQ: CloseReq from server seen, expecting Close from client | |
117 | * CLOSING: Close seen, expecting Reset | |
118 | * TIMEWAIT: Reset seen | |
119 | * IGNORE: Not determinable whether packet is valid | |
120 | * | |
121 | * Some states exist only on one side of the connection: REQUEST, RESPOND, | |
122 | * PARTOPEN, CLOSEREQ. For the other side these states are equivalent to | |
123 | * the one it was in before. | |
124 | * | |
125 | * Packets are marked as ignored (sIG) if we don't know if they're valid | |
126 | * (for example a reincarnation of a connection we didn't notice is dead | |
127 | * already) and the server may send back a connection closing Reset or a | |
128 | * Response. They're also used for Sync/SyncAck packets, which we don't | |
129 | * care about. | |
130 | */ | |
131 | static const u_int8_t | |
132 | dccp_state_table[CT_DCCP_ROLE_MAX + 1][DCCP_PKT_SYNCACK + 1][CT_DCCP_MAX + 1] = { | |
133 | [CT_DCCP_ROLE_CLIENT] = { | |
134 | [DCCP_PKT_REQUEST] = { | |
135 | /* | |
136 | * sNO -> sRQ Regular Request | |
137 | * sRQ -> sRQ Retransmitted Request or reincarnation | |
138 | * sRS -> sRS Retransmitted Request (apparently Response | |
139 | * got lost after we saw it) or reincarnation | |
140 | * sPO -> sIG Ignore, conntrack might be out of sync | |
141 | * sOP -> sIG Ignore, conntrack might be out of sync | |
142 | * sCR -> sIG Ignore, conntrack might be out of sync | |
143 | * sCG -> sIG Ignore, conntrack might be out of sync | |
144 | * sTW -> sRQ Reincarnation | |
145 | * | |
146 | * sNO, sRQ, sRS, sPO. sOP, sCR, sCG, sTW, */ | |
147 | sRQ, sRQ, sRS, sIG, sIG, sIG, sIG, sRQ, | |
148 | }, | |
149 | [DCCP_PKT_RESPONSE] = { | |
150 | /* | |
151 | * sNO -> sIV Invalid | |
152 | * sRQ -> sIG Ignore, might be response to ignored Request | |
153 | * sRS -> sIG Ignore, might be response to ignored Request | |
154 | * sPO -> sIG Ignore, might be response to ignored Request | |
155 | * sOP -> sIG Ignore, might be response to ignored Request | |
156 | * sCR -> sIG Ignore, might be response to ignored Request | |
157 | * sCG -> sIG Ignore, might be response to ignored Request | |
158 | * sTW -> sIV Invalid, reincarnation in reverse direction | |
159 | * goes through sRQ | |
160 | * | |
161 | * sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */ | |
162 | sIV, sIG, sIG, sIG, sIG, sIG, sIG, sIV, | |
163 | }, | |
164 | [DCCP_PKT_ACK] = { | |
165 | /* | |
166 | * sNO -> sIV No connection | |
167 | * sRQ -> sIV No connection | |
168 | * sRS -> sPO Ack for Response, move to PARTOPEN (8.1.5.) | |
169 | * sPO -> sPO Retransmitted Ack for Response, remain in PARTOPEN | |
170 | * sOP -> sOP Regular ACK, remain in OPEN | |
171 | * sCR -> sCR Ack in CLOSEREQ MAY be processed (8.3.) | |
172 | * sCG -> sCG Ack in CLOSING MAY be processed (8.3.) | |
173 | * sTW -> sIV | |
174 | * | |
175 | * sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */ | |
176 | sIV, sIV, sPO, sPO, sOP, sCR, sCG, sIV | |
177 | }, | |
178 | [DCCP_PKT_DATA] = { | |
179 | /* | |
180 | * sNO -> sIV No connection | |
181 | * sRQ -> sIV No connection | |
182 | * sRS -> sIV No connection | |
183 | * sPO -> sIV MUST use DataAck in PARTOPEN state (8.1.5.) | |
184 | * sOP -> sOP Regular Data packet | |
185 | * sCR -> sCR Data in CLOSEREQ MAY be processed (8.3.) | |
186 | * sCG -> sCG Data in CLOSING MAY be processed (8.3.) | |
187 | * sTW -> sIV | |
188 | * | |
189 | * sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */ | |
190 | sIV, sIV, sIV, sIV, sOP, sCR, sCG, sIV, | |
191 | }, | |
192 | [DCCP_PKT_DATAACK] = { | |
193 | /* | |
194 | * sNO -> sIV No connection | |
195 | * sRQ -> sIV No connection | |
196 | * sRS -> sPO Ack for Response, move to PARTOPEN (8.1.5.) | |
197 | * sPO -> sPO Remain in PARTOPEN state | |
198 | * sOP -> sOP Regular DataAck packet in OPEN state | |
199 | * sCR -> sCR DataAck in CLOSEREQ MAY be processed (8.3.) | |
200 | * sCG -> sCG DataAck in CLOSING MAY be processed (8.3.) | |
201 | * sTW -> sIV | |
202 | * | |
203 | * sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */ | |
204 | sIV, sIV, sPO, sPO, sOP, sCR, sCG, sIV | |
205 | }, | |
206 | [DCCP_PKT_CLOSEREQ] = { | |
207 | /* | |
208 | * CLOSEREQ may only be sent by the server. | |
209 | * | |
210 | * sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */ | |
211 | sIV, sIV, sIV, sIV, sIV, sIV, sIV, sIV | |
212 | }, | |
213 | [DCCP_PKT_CLOSE] = { | |
214 | /* | |
215 | * sNO -> sIV No connection | |
216 | * sRQ -> sIV No connection | |
217 | * sRS -> sIV No connection | |
218 | * sPO -> sCG Client-initiated close | |
219 | * sOP -> sCG Client-initiated close | |
220 | * sCR -> sCG Close in response to CloseReq (8.3.) | |
221 | * sCG -> sCG Retransmit | |
222 | * sTW -> sIV Late retransmit, already in TIME_WAIT | |
223 | * | |
224 | * sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */ | |
225 | sIV, sIV, sIV, sCG, sCG, sCG, sIV, sIV | |
226 | }, | |
227 | [DCCP_PKT_RESET] = { | |
228 | /* | |
229 | * sNO -> sIV No connection | |
230 | * sRQ -> sTW Sync received or timeout, SHOULD send Reset (8.1.1.) | |
231 | * sRS -> sTW Response received without Request | |
232 | * sPO -> sTW Timeout, SHOULD send Reset (8.1.5.) | |
233 | * sOP -> sTW Connection reset | |
234 | * sCR -> sTW Connection reset | |
235 | * sCG -> sTW Connection reset | |
236 | * sTW -> sIG Ignore (don't refresh timer) | |
237 | * | |
238 | * sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */ | |
239 | sIV, sTW, sTW, sTW, sTW, sTW, sTW, sIG | |
240 | }, | |
241 | [DCCP_PKT_SYNC] = { | |
242 | /* | |
243 | * We currently ignore Sync packets | |
244 | * | |
245 | * sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */ | |
246 | sIG, sIG, sIG, sIG, sIG, sIG, sIG, sIG, | |
247 | }, | |
248 | [DCCP_PKT_SYNCACK] = { | |
249 | /* | |
250 | * We currently ignore SyncAck packets | |
251 | * | |
252 | * sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */ | |
253 | sIG, sIG, sIG, sIG, sIG, sIG, sIG, sIG, | |
254 | }, | |
255 | }, | |
256 | [CT_DCCP_ROLE_SERVER] = { | |
257 | [DCCP_PKT_REQUEST] = { | |
258 | /* | |
259 | * sNO -> sIV Invalid | |
260 | * sRQ -> sIG Ignore, conntrack might be out of sync | |
261 | * sRS -> sIG Ignore, conntrack might be out of sync | |
262 | * sPO -> sIG Ignore, conntrack might be out of sync | |
263 | * sOP -> sIG Ignore, conntrack might be out of sync | |
264 | * sCR -> sIG Ignore, conntrack might be out of sync | |
265 | * sCG -> sIG Ignore, conntrack might be out of sync | |
266 | * sTW -> sRQ Reincarnation, must reverse roles | |
267 | * | |
268 | * sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */ | |
269 | sIV, sIG, sIG, sIG, sIG, sIG, sIG, sRQ | |
270 | }, | |
271 | [DCCP_PKT_RESPONSE] = { | |
272 | /* | |
273 | * sNO -> sIV Response without Request | |
274 | * sRQ -> sRS Response to clients Request | |
275 | * sRS -> sRS Retransmitted Response (8.1.3. SHOULD NOT) | |
276 | * sPO -> sIG Response to an ignored Request or late retransmit | |
277 | * sOP -> sIG Ignore, might be response to ignored Request | |
278 | * sCR -> sIG Ignore, might be response to ignored Request | |
279 | * sCG -> sIG Ignore, might be response to ignored Request | |
280 | * sTW -> sIV Invalid, Request from client in sTW moves to sRQ | |
281 | * | |
282 | * sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */ | |
283 | sIV, sRS, sRS, sIG, sIG, sIG, sIG, sIV | |
284 | }, | |
285 | [DCCP_PKT_ACK] = { | |
286 | /* | |
287 | * sNO -> sIV No connection | |
288 | * sRQ -> sIV No connection | |
289 | * sRS -> sIV No connection | |
290 | * sPO -> sOP Enter OPEN state (8.1.5.) | |
291 | * sOP -> sOP Regular Ack in OPEN state | |
292 | * sCR -> sIV Waiting for Close from client | |
293 | * sCG -> sCG Ack in CLOSING MAY be processed (8.3.) | |
294 | * sTW -> sIV | |
295 | * | |
296 | * sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */ | |
297 | sIV, sIV, sIV, sOP, sOP, sIV, sCG, sIV | |
298 | }, | |
299 | [DCCP_PKT_DATA] = { | |
300 | /* | |
301 | * sNO -> sIV No connection | |
302 | * sRQ -> sIV No connection | |
303 | * sRS -> sIV No connection | |
304 | * sPO -> sOP Enter OPEN state (8.1.5.) | |
305 | * sOP -> sOP Regular Data packet in OPEN state | |
306 | * sCR -> sIV Waiting for Close from client | |
307 | * sCG -> sCG Data in CLOSING MAY be processed (8.3.) | |
308 | * sTW -> sIV | |
309 | * | |
310 | * sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */ | |
311 | sIV, sIV, sIV, sOP, sOP, sIV, sCG, sIV | |
312 | }, | |
313 | [DCCP_PKT_DATAACK] = { | |
314 | /* | |
315 | * sNO -> sIV No connection | |
316 | * sRQ -> sIV No connection | |
317 | * sRS -> sIV No connection | |
318 | * sPO -> sOP Enter OPEN state (8.1.5.) | |
319 | * sOP -> sOP Regular DataAck in OPEN state | |
320 | * sCR -> sIV Waiting for Close from client | |
321 | * sCG -> sCG Data in CLOSING MAY be processed (8.3.) | |
322 | * sTW -> sIV | |
323 | * | |
324 | * sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */ | |
325 | sIV, sIV, sIV, sOP, sOP, sIV, sCG, sIV | |
326 | }, | |
327 | [DCCP_PKT_CLOSEREQ] = { | |
328 | /* | |
329 | * sNO -> sIV No connection | |
330 | * sRQ -> sIV No connection | |
331 | * sRS -> sIV No connection | |
332 | * sPO -> sOP -> sCR Move directly to CLOSEREQ (8.1.5.) | |
333 | * sOP -> sCR CloseReq in OPEN state | |
334 | * sCR -> sCR Retransmit | |
335 | * sCG -> sCR Simultaneous close, client sends another Close | |
336 | * sTW -> sIV Already closed | |
337 | * | |
338 | * sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */ | |
339 | sIV, sIV, sIV, sCR, sCR, sCR, sCR, sIV | |
340 | }, | |
341 | [DCCP_PKT_CLOSE] = { | |
342 | /* | |
343 | * sNO -> sIV No connection | |
344 | * sRQ -> sIV No connection | |
345 | * sRS -> sIV No connection | |
346 | * sPO -> sOP -> sCG Move direcly to CLOSING | |
347 | * sOP -> sCG Move to CLOSING | |
348 | * sCR -> sIV Close after CloseReq is invalid | |
349 | * sCG -> sCG Retransmit | |
350 | * sTW -> sIV Already closed | |
351 | * | |
352 | * sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */ | |
353 | sIV, sIV, sIV, sCG, sCG, sIV, sCG, sIV | |
354 | }, | |
355 | [DCCP_PKT_RESET] = { | |
356 | /* | |
357 | * sNO -> sIV No connection | |
358 | * sRQ -> sTW Reset in response to Request | |
359 | * sRS -> sTW Timeout, SHOULD send Reset (8.1.3.) | |
360 | * sPO -> sTW Timeout, SHOULD send Reset (8.1.3.) | |
361 | * sOP -> sTW | |
362 | * sCR -> sTW | |
363 | * sCG -> sTW | |
364 | * sTW -> sIG Ignore (don't refresh timer) | |
365 | * | |
366 | * sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW, sTW */ | |
367 | sIV, sTW, sTW, sTW, sTW, sTW, sTW, sTW, sIG | |
368 | }, | |
369 | [DCCP_PKT_SYNC] = { | |
370 | /* | |
371 | * We currently ignore Sync packets | |
372 | * | |
373 | * sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */ | |
374 | sIG, sIG, sIG, sIG, sIG, sIG, sIG, sIG, | |
375 | }, | |
376 | [DCCP_PKT_SYNCACK] = { | |
377 | /* | |
378 | * We currently ignore SyncAck packets | |
379 | * | |
380 | * sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */ | |
381 | sIG, sIG, sIG, sIG, sIG, sIG, sIG, sIG, | |
382 | }, | |
383 | }, | |
384 | }; | |
385 | ||
c51d3901 | 386 | static inline struct nf_dccp_net *dccp_pernet(struct net *net) |
1546000f | 387 | { |
c51d3901 | 388 | return &net->ct.nf_ct_proto.dccp; |
1546000f CG |
389 | } |
390 | ||
09f263cd | 391 | static bool dccp_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff, |
a31f1adc | 392 | struct net *net, struct nf_conntrack_tuple *tuple) |
2bc78049 PM |
393 | { |
394 | struct dccp_hdr _hdr, *dh; | |
395 | ||
e5e693ab GF |
396 | /* Actually only need first 4 bytes to get ports. */ |
397 | dh = skb_header_pointer(skb, dataoff, 4, &_hdr); | |
2bc78049 | 398 | if (dh == NULL) |
09f263cd | 399 | return false; |
2bc78049 PM |
400 | |
401 | tuple->src.u.dccp.port = dh->dccph_sport; | |
402 | tuple->dst.u.dccp.port = dh->dccph_dport; | |
09f263cd | 403 | return true; |
2bc78049 PM |
404 | } |
405 | ||
09f263cd JE |
406 | static bool dccp_invert_tuple(struct nf_conntrack_tuple *inv, |
407 | const struct nf_conntrack_tuple *tuple) | |
2bc78049 PM |
408 | { |
409 | inv->src.u.dccp.port = tuple->dst.u.dccp.port; | |
410 | inv->dst.u.dccp.port = tuple->src.u.dccp.port; | |
09f263cd | 411 | return true; |
2bc78049 PM |
412 | } |
413 | ||
09f263cd | 414 | static bool dccp_new(struct nf_conn *ct, const struct sk_buff *skb, |
2c8503f5 | 415 | unsigned int dataoff, unsigned int *timeouts) |
2bc78049 | 416 | { |
c2a2c7e0 | 417 | struct net *net = nf_ct_net(ct); |
c51d3901 | 418 | struct nf_dccp_net *dn; |
2bc78049 PM |
419 | struct dccp_hdr _dh, *dh; |
420 | const char *msg; | |
421 | u_int8_t state; | |
422 | ||
b22f5126 | 423 | dh = skb_header_pointer(skb, dataoff, sizeof(_dh), &_dh); |
2bc78049 PM |
424 | BUG_ON(dh == NULL); |
425 | ||
426 | state = dccp_state_table[CT_DCCP_ROLE_CLIENT][dh->dccph_type][CT_DCCP_NONE]; | |
427 | switch (state) { | |
428 | default: | |
1546000f CG |
429 | dn = dccp_pernet(net); |
430 | if (dn->dccp_loose == 0) { | |
2bc78049 PM |
431 | msg = "nf_ct_dccp: not picking up existing connection "; |
432 | goto out_invalid; | |
433 | } | |
434 | case CT_DCCP_REQUEST: | |
435 | break; | |
436 | case CT_DCCP_INVALID: | |
437 | msg = "nf_ct_dccp: invalid state transition "; | |
438 | goto out_invalid; | |
439 | } | |
440 | ||
441 | ct->proto.dccp.role[IP_CT_DIR_ORIGINAL] = CT_DCCP_ROLE_CLIENT; | |
442 | ct->proto.dccp.role[IP_CT_DIR_REPLY] = CT_DCCP_ROLE_SERVER; | |
443 | ct->proto.dccp.state = CT_DCCP_NONE; | |
e5fc9e7a CG |
444 | ct->proto.dccp.last_pkt = DCCP_PKT_REQUEST; |
445 | ct->proto.dccp.last_dir = IP_CT_DIR_ORIGINAL; | |
446 | ct->proto.dccp.handshake_seq = 0; | |
09f263cd | 447 | return true; |
2bc78049 PM |
448 | |
449 | out_invalid: | |
c2a2c7e0 | 450 | if (LOG_INVALID(net, IPPROTO_DCCP)) |
30e0c6a6 | 451 | nf_log_packet(net, nf_ct_l3num(ct), 0, skb, NULL, NULL, |
138aef7d | 452 | NULL, "%s", msg); |
09f263cd | 453 | return false; |
2bc78049 PM |
454 | } |
455 | ||
456 | static u64 dccp_ack_seq(const struct dccp_hdr *dh) | |
457 | { | |
458 | const struct dccp_hdr_ack_bits *dhack; | |
459 | ||
460 | dhack = (void *)dh + __dccp_basic_hdr_len(dh); | |
461 | return ((u64)ntohs(dhack->dccph_ack_nr_high) << 32) + | |
462 | ntohl(dhack->dccph_ack_nr_low); | |
463 | } | |
464 | ||
2c8503f5 PNA |
465 | static unsigned int *dccp_get_timeouts(struct net *net) |
466 | { | |
467 | return dccp_pernet(net)->dccp_timeout; | |
468 | } | |
469 | ||
2bc78049 PM |
470 | static int dccp_packet(struct nf_conn *ct, const struct sk_buff *skb, |
471 | unsigned int dataoff, enum ip_conntrack_info ctinfo, | |
2c8503f5 PNA |
472 | u_int8_t pf, unsigned int hooknum, |
473 | unsigned int *timeouts) | |
2bc78049 | 474 | { |
c2a2c7e0 | 475 | struct net *net = nf_ct_net(ct); |
2bc78049 PM |
476 | enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo); |
477 | struct dccp_hdr _dh, *dh; | |
478 | u_int8_t type, old_state, new_state; | |
479 | enum ct_dccp_roles role; | |
480 | ||
b22f5126 | 481 | dh = skb_header_pointer(skb, dataoff, sizeof(_dh), &_dh); |
2bc78049 PM |
482 | BUG_ON(dh == NULL); |
483 | type = dh->dccph_type; | |
484 | ||
485 | if (type == DCCP_PKT_RESET && | |
486 | !test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) { | |
487 | /* Tear down connection immediately if only reply is a RESET */ | |
718d4ad9 | 488 | nf_ct_kill_acct(ct, ctinfo, skb); |
2bc78049 PM |
489 | return NF_ACCEPT; |
490 | } | |
491 | ||
440f0d58 | 492 | spin_lock_bh(&ct->lock); |
2bc78049 PM |
493 | |
494 | role = ct->proto.dccp.role[dir]; | |
495 | old_state = ct->proto.dccp.state; | |
496 | new_state = dccp_state_table[role][type][old_state]; | |
497 | ||
498 | switch (new_state) { | |
499 | case CT_DCCP_REQUEST: | |
500 | if (old_state == CT_DCCP_TIMEWAIT && | |
501 | role == CT_DCCP_ROLE_SERVER) { | |
502 | /* Reincarnation in the reverse direction: reopen and | |
503 | * reverse client/server roles. */ | |
504 | ct->proto.dccp.role[dir] = CT_DCCP_ROLE_CLIENT; | |
505 | ct->proto.dccp.role[!dir] = CT_DCCP_ROLE_SERVER; | |
506 | } | |
507 | break; | |
508 | case CT_DCCP_RESPOND: | |
509 | if (old_state == CT_DCCP_REQUEST) | |
510 | ct->proto.dccp.handshake_seq = dccp_hdr_seq(dh); | |
511 | break; | |
512 | case CT_DCCP_PARTOPEN: | |
513 | if (old_state == CT_DCCP_RESPOND && | |
514 | type == DCCP_PKT_ACK && | |
515 | dccp_ack_seq(dh) == ct->proto.dccp.handshake_seq) | |
516 | set_bit(IPS_ASSURED_BIT, &ct->status); | |
517 | break; | |
518 | case CT_DCCP_IGNORE: | |
519 | /* | |
520 | * Connection tracking might be out of sync, so we ignore | |
521 | * packets that might establish a new connection and resync | |
522 | * if the server responds with a valid Response. | |
523 | */ | |
524 | if (ct->proto.dccp.last_dir == !dir && | |
525 | ct->proto.dccp.last_pkt == DCCP_PKT_REQUEST && | |
526 | type == DCCP_PKT_RESPONSE) { | |
527 | ct->proto.dccp.role[!dir] = CT_DCCP_ROLE_CLIENT; | |
528 | ct->proto.dccp.role[dir] = CT_DCCP_ROLE_SERVER; | |
529 | ct->proto.dccp.handshake_seq = dccp_hdr_seq(dh); | |
530 | new_state = CT_DCCP_RESPOND; | |
531 | break; | |
532 | } | |
533 | ct->proto.dccp.last_dir = dir; | |
534 | ct->proto.dccp.last_pkt = type; | |
535 | ||
440f0d58 | 536 | spin_unlock_bh(&ct->lock); |
c2a2c7e0 | 537 | if (LOG_INVALID(net, IPPROTO_DCCP)) |
30e0c6a6 | 538 | nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL, |
2bc78049 PM |
539 | "nf_ct_dccp: invalid packet ignored "); |
540 | return NF_ACCEPT; | |
541 | case CT_DCCP_INVALID: | |
440f0d58 | 542 | spin_unlock_bh(&ct->lock); |
c2a2c7e0 | 543 | if (LOG_INVALID(net, IPPROTO_DCCP)) |
30e0c6a6 | 544 | nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL, |
2bc78049 PM |
545 | "nf_ct_dccp: invalid state transition "); |
546 | return -NF_ACCEPT; | |
547 | } | |
548 | ||
549 | ct->proto.dccp.last_dir = dir; | |
550 | ct->proto.dccp.last_pkt = type; | |
551 | ct->proto.dccp.state = new_state; | |
440f0d58 | 552 | spin_unlock_bh(&ct->lock); |
1546000f | 553 | |
b38b1f61 PNA |
554 | if (new_state != old_state) |
555 | nf_conntrack_event_cache(IPCT_PROTOINFO, ct); | |
556 | ||
2c8503f5 | 557 | nf_ct_refresh_acct(ct, ctinfo, skb, timeouts[new_state]); |
2bc78049 PM |
558 | |
559 | return NF_ACCEPT; | |
560 | } | |
561 | ||
8fea97ec PM |
562 | static int dccp_error(struct net *net, struct nf_conn *tmpl, |
563 | struct sk_buff *skb, unsigned int dataoff, | |
564 | enum ip_conntrack_info *ctinfo, | |
74c51a14 | 565 | u_int8_t pf, unsigned int hooknum) |
2bc78049 PM |
566 | { |
567 | struct dccp_hdr _dh, *dh; | |
568 | unsigned int dccp_len = skb->len - dataoff; | |
569 | unsigned int cscov; | |
570 | const char *msg; | |
571 | ||
b22f5126 | 572 | dh = skb_header_pointer(skb, dataoff, sizeof(_dh), &_dh); |
2bc78049 PM |
573 | if (dh == NULL) { |
574 | msg = "nf_ct_dccp: short packet "; | |
575 | goto out_invalid; | |
576 | } | |
577 | ||
578 | if (dh->dccph_doff * 4 < sizeof(struct dccp_hdr) || | |
579 | dh->dccph_doff * 4 > dccp_len) { | |
580 | msg = "nf_ct_dccp: truncated/malformed packet "; | |
581 | goto out_invalid; | |
582 | } | |
583 | ||
584 | cscov = dccp_len; | |
585 | if (dh->dccph_cscov) { | |
586 | cscov = (dh->dccph_cscov - 1) * 4; | |
587 | if (cscov > dccp_len) { | |
588 | msg = "nf_ct_dccp: bad checksum coverage "; | |
589 | goto out_invalid; | |
590 | } | |
591 | } | |
592 | ||
c04d0552 | 593 | if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING && |
2bc78049 PM |
594 | nf_checksum_partial(skb, hooknum, dataoff, cscov, IPPROTO_DCCP, |
595 | pf)) { | |
596 | msg = "nf_ct_dccp: bad checksum "; | |
597 | goto out_invalid; | |
598 | } | |
599 | ||
600 | if (dh->dccph_type >= DCCP_PKT_INVALID) { | |
601 | msg = "nf_ct_dccp: reserved packet type "; | |
602 | goto out_invalid; | |
603 | } | |
604 | ||
605 | return NF_ACCEPT; | |
606 | ||
607 | out_invalid: | |
c2a2c7e0 | 608 | if (LOG_INVALID(net, IPPROTO_DCCP)) |
138aef7d | 609 | nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL, "%s", msg); |
2bc78049 PM |
610 | return -NF_ACCEPT; |
611 | } | |
612 | ||
824f1fbe JP |
613 | static void dccp_print_tuple(struct seq_file *s, |
614 | const struct nf_conntrack_tuple *tuple) | |
2bc78049 | 615 | { |
824f1fbe JP |
616 | seq_printf(s, "sport=%hu dport=%hu ", |
617 | ntohs(tuple->src.u.dccp.port), | |
618 | ntohs(tuple->dst.u.dccp.port)); | |
2bc78049 PM |
619 | } |
620 | ||
37246a58 | 621 | static void dccp_print_conntrack(struct seq_file *s, struct nf_conn *ct) |
2bc78049 | 622 | { |
37246a58 | 623 | seq_printf(s, "%s ", dccp_state_names[ct->proto.dccp.state]); |
2bc78049 PM |
624 | } |
625 | ||
c0cd1156 | 626 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK) |
2bc78049 | 627 | static int dccp_to_nlattr(struct sk_buff *skb, struct nlattr *nla, |
440f0d58 | 628 | struct nf_conn *ct) |
2bc78049 PM |
629 | { |
630 | struct nlattr *nest_parms; | |
631 | ||
440f0d58 | 632 | spin_lock_bh(&ct->lock); |
2bc78049 PM |
633 | nest_parms = nla_nest_start(skb, CTA_PROTOINFO_DCCP | NLA_F_NESTED); |
634 | if (!nest_parms) | |
635 | goto nla_put_failure; | |
516ee48f DM |
636 | if (nla_put_u8(skb, CTA_PROTOINFO_DCCP_STATE, ct->proto.dccp.state) || |
637 | nla_put_u8(skb, CTA_PROTOINFO_DCCP_ROLE, | |
638 | ct->proto.dccp.role[IP_CT_DIR_ORIGINAL]) || | |
639 | nla_put_be64(skb, CTA_PROTOINFO_DCCP_HANDSHAKE_SEQ, | |
b46f6ded ND |
640 | cpu_to_be64(ct->proto.dccp.handshake_seq), |
641 | CTA_PROTOINFO_DCCP_PAD)) | |
516ee48f | 642 | goto nla_put_failure; |
2bc78049 | 643 | nla_nest_end(skb, nest_parms); |
440f0d58 | 644 | spin_unlock_bh(&ct->lock); |
2bc78049 PM |
645 | return 0; |
646 | ||
647 | nla_put_failure: | |
440f0d58 | 648 | spin_unlock_bh(&ct->lock); |
2bc78049 PM |
649 | return -1; |
650 | } | |
651 | ||
652 | static const struct nla_policy dccp_nla_policy[CTA_PROTOINFO_DCCP_MAX + 1] = { | |
653 | [CTA_PROTOINFO_DCCP_STATE] = { .type = NLA_U8 }, | |
71951b64 | 654 | [CTA_PROTOINFO_DCCP_ROLE] = { .type = NLA_U8 }, |
a17c8598 | 655 | [CTA_PROTOINFO_DCCP_HANDSHAKE_SEQ] = { .type = NLA_U64 }, |
b46f6ded | 656 | [CTA_PROTOINFO_DCCP_PAD] = { .type = NLA_UNSPEC }, |
2bc78049 PM |
657 | }; |
658 | ||
659 | static int nlattr_to_dccp(struct nlattr *cda[], struct nf_conn *ct) | |
660 | { | |
661 | struct nlattr *attr = cda[CTA_PROTOINFO_DCCP]; | |
662 | struct nlattr *tb[CTA_PROTOINFO_DCCP_MAX + 1]; | |
663 | int err; | |
664 | ||
665 | if (!attr) | |
666 | return 0; | |
667 | ||
668 | err = nla_parse_nested(tb, CTA_PROTOINFO_DCCP_MAX, attr, | |
669 | dccp_nla_policy); | |
670 | if (err < 0) | |
671 | return err; | |
672 | ||
673 | if (!tb[CTA_PROTOINFO_DCCP_STATE] || | |
71951b64 PNA |
674 | !tb[CTA_PROTOINFO_DCCP_ROLE] || |
675 | nla_get_u8(tb[CTA_PROTOINFO_DCCP_ROLE]) > CT_DCCP_ROLE_MAX || | |
676 | nla_get_u8(tb[CTA_PROTOINFO_DCCP_STATE]) >= CT_DCCP_IGNORE) { | |
2bc78049 | 677 | return -EINVAL; |
71951b64 | 678 | } |
2bc78049 | 679 | |
440f0d58 | 680 | spin_lock_bh(&ct->lock); |
2bc78049 | 681 | ct->proto.dccp.state = nla_get_u8(tb[CTA_PROTOINFO_DCCP_STATE]); |
71951b64 PNA |
682 | if (nla_get_u8(tb[CTA_PROTOINFO_DCCP_ROLE]) == CT_DCCP_ROLE_CLIENT) { |
683 | ct->proto.dccp.role[IP_CT_DIR_ORIGINAL] = CT_DCCP_ROLE_CLIENT; | |
684 | ct->proto.dccp.role[IP_CT_DIR_REPLY] = CT_DCCP_ROLE_SERVER; | |
685 | } else { | |
686 | ct->proto.dccp.role[IP_CT_DIR_ORIGINAL] = CT_DCCP_ROLE_SERVER; | |
687 | ct->proto.dccp.role[IP_CT_DIR_REPLY] = CT_DCCP_ROLE_CLIENT; | |
688 | } | |
a17c8598 PNA |
689 | if (tb[CTA_PROTOINFO_DCCP_HANDSHAKE_SEQ]) { |
690 | ct->proto.dccp.handshake_seq = | |
691 | be64_to_cpu(nla_get_be64(tb[CTA_PROTOINFO_DCCP_HANDSHAKE_SEQ])); | |
692 | } | |
440f0d58 | 693 | spin_unlock_bh(&ct->lock); |
2bc78049 PM |
694 | return 0; |
695 | } | |
a400c30e HE |
696 | |
697 | static int dccp_nlattr_size(void) | |
698 | { | |
699 | return nla_total_size(0) /* CTA_PROTOINFO_DCCP */ | |
700 | + nla_policy_len(dccp_nla_policy, CTA_PROTOINFO_DCCP_MAX + 1); | |
701 | } | |
50978462 | 702 | |
2bc78049 PM |
703 | #endif |
704 | ||
50978462 PNA |
705 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) |
706 | ||
707 | #include <linux/netfilter/nfnetlink.h> | |
708 | #include <linux/netfilter/nfnetlink_cttimeout.h> | |
709 | ||
8264deb8 G |
710 | static int dccp_timeout_nlattr_to_obj(struct nlattr *tb[], |
711 | struct net *net, void *data) | |
50978462 | 712 | { |
c51d3901 | 713 | struct nf_dccp_net *dn = dccp_pernet(net); |
50978462 PNA |
714 | unsigned int *timeouts = data; |
715 | int i; | |
716 | ||
717 | /* set default DCCP timeouts. */ | |
718 | for (i=0; i<CT_DCCP_MAX; i++) | |
719 | timeouts[i] = dn->dccp_timeout[i]; | |
720 | ||
721 | /* there's a 1:1 mapping between attributes and protocol states. */ | |
722 | for (i=CTA_TIMEOUT_DCCP_UNSPEC+1; i<CTA_TIMEOUT_DCCP_MAX+1; i++) { | |
723 | if (tb[i]) { | |
724 | timeouts[i] = ntohl(nla_get_be32(tb[i])) * HZ; | |
725 | } | |
726 | } | |
727 | return 0; | |
728 | } | |
729 | ||
730 | static int | |
731 | dccp_timeout_obj_to_nlattr(struct sk_buff *skb, const void *data) | |
732 | { | |
733 | const unsigned int *timeouts = data; | |
734 | int i; | |
735 | ||
516ee48f DM |
736 | for (i=CTA_TIMEOUT_DCCP_UNSPEC+1; i<CTA_TIMEOUT_DCCP_MAX+1; i++) { |
737 | if (nla_put_be32(skb, i, htonl(timeouts[i] / HZ))) | |
738 | goto nla_put_failure; | |
739 | } | |
50978462 PNA |
740 | return 0; |
741 | ||
742 | nla_put_failure: | |
743 | return -ENOSPC; | |
744 | } | |
745 | ||
746 | static const struct nla_policy | |
747 | dccp_timeout_nla_policy[CTA_TIMEOUT_DCCP_MAX+1] = { | |
748 | [CTA_TIMEOUT_DCCP_REQUEST] = { .type = NLA_U32 }, | |
749 | [CTA_TIMEOUT_DCCP_RESPOND] = { .type = NLA_U32 }, | |
750 | [CTA_TIMEOUT_DCCP_PARTOPEN] = { .type = NLA_U32 }, | |
751 | [CTA_TIMEOUT_DCCP_OPEN] = { .type = NLA_U32 }, | |
752 | [CTA_TIMEOUT_DCCP_CLOSEREQ] = { .type = NLA_U32 }, | |
753 | [CTA_TIMEOUT_DCCP_CLOSING] = { .type = NLA_U32 }, | |
754 | [CTA_TIMEOUT_DCCP_TIMEWAIT] = { .type = NLA_U32 }, | |
755 | }; | |
756 | #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ | |
757 | ||
2bc78049 | 758 | #ifdef CONFIG_SYSCTL |
1546000f CG |
759 | /* template, data assigned later */ |
760 | static struct ctl_table dccp_sysctl_table[] = { | |
2bc78049 | 761 | { |
2bc78049 | 762 | .procname = "nf_conntrack_dccp_timeout_request", |
2bc78049 PM |
763 | .maxlen = sizeof(unsigned int), |
764 | .mode = 0644, | |
765 | .proc_handler = proc_dointvec_jiffies, | |
766 | }, | |
767 | { | |
2bc78049 | 768 | .procname = "nf_conntrack_dccp_timeout_respond", |
2bc78049 PM |
769 | .maxlen = sizeof(unsigned int), |
770 | .mode = 0644, | |
771 | .proc_handler = proc_dointvec_jiffies, | |
772 | }, | |
773 | { | |
2bc78049 | 774 | .procname = "nf_conntrack_dccp_timeout_partopen", |
2bc78049 PM |
775 | .maxlen = sizeof(unsigned int), |
776 | .mode = 0644, | |
777 | .proc_handler = proc_dointvec_jiffies, | |
778 | }, | |
779 | { | |
2bc78049 | 780 | .procname = "nf_conntrack_dccp_timeout_open", |
2bc78049 PM |
781 | .maxlen = sizeof(unsigned int), |
782 | .mode = 0644, | |
783 | .proc_handler = proc_dointvec_jiffies, | |
784 | }, | |
785 | { | |
2bc78049 | 786 | .procname = "nf_conntrack_dccp_timeout_closereq", |
2bc78049 PM |
787 | .maxlen = sizeof(unsigned int), |
788 | .mode = 0644, | |
789 | .proc_handler = proc_dointvec_jiffies, | |
790 | }, | |
791 | { | |
2bc78049 | 792 | .procname = "nf_conntrack_dccp_timeout_closing", |
2bc78049 PM |
793 | .maxlen = sizeof(unsigned int), |
794 | .mode = 0644, | |
795 | .proc_handler = proc_dointvec_jiffies, | |
796 | }, | |
797 | { | |
2bc78049 | 798 | .procname = "nf_conntrack_dccp_timeout_timewait", |
2bc78049 PM |
799 | .maxlen = sizeof(unsigned int), |
800 | .mode = 0644, | |
801 | .proc_handler = proc_dointvec_jiffies, | |
802 | }, | |
803 | { | |
2bc78049 | 804 | .procname = "nf_conntrack_dccp_loose", |
1546000f | 805 | .maxlen = sizeof(int), |
2bc78049 PM |
806 | .mode = 0644, |
807 | .proc_handler = proc_dointvec, | |
808 | }, | |
f8572d8f | 809 | { } |
2bc78049 PM |
810 | }; |
811 | #endif /* CONFIG_SYSCTL */ | |
812 | ||
464dc801 | 813 | static int dccp_kmemdup_sysctl_table(struct net *net, struct nf_proto_net *pn, |
c51d3901 | 814 | struct nf_dccp_net *dn) |
54b8873f G |
815 | { |
816 | #ifdef CONFIG_SYSCTL | |
817 | if (pn->ctl_table) | |
818 | return 0; | |
819 | ||
820 | pn->ctl_table = kmemdup(dccp_sysctl_table, | |
821 | sizeof(dccp_sysctl_table), | |
822 | GFP_KERNEL); | |
823 | if (!pn->ctl_table) | |
824 | return -ENOMEM; | |
825 | ||
826 | pn->ctl_table[0].data = &dn->dccp_timeout[CT_DCCP_REQUEST]; | |
827 | pn->ctl_table[1].data = &dn->dccp_timeout[CT_DCCP_RESPOND]; | |
828 | pn->ctl_table[2].data = &dn->dccp_timeout[CT_DCCP_PARTOPEN]; | |
829 | pn->ctl_table[3].data = &dn->dccp_timeout[CT_DCCP_OPEN]; | |
830 | pn->ctl_table[4].data = &dn->dccp_timeout[CT_DCCP_CLOSEREQ]; | |
831 | pn->ctl_table[5].data = &dn->dccp_timeout[CT_DCCP_CLOSING]; | |
832 | pn->ctl_table[6].data = &dn->dccp_timeout[CT_DCCP_TIMEWAIT]; | |
833 | pn->ctl_table[7].data = &dn->dccp_loose; | |
464dc801 EB |
834 | |
835 | /* Don't export sysctls to unprivileged users */ | |
836 | if (net->user_ns != &init_user_ns) | |
837 | pn->ctl_table[0].procname = NULL; | |
54b8873f G |
838 | #endif |
839 | return 0; | |
840 | } | |
841 | ||
f1caad27 | 842 | static int dccp_init_net(struct net *net, u_int16_t proto) |
84c39451 | 843 | { |
c51d3901 | 844 | struct nf_dccp_net *dn = dccp_pernet(net); |
54b8873f | 845 | struct nf_proto_net *pn = &dn->pn; |
84c39451 | 846 | |
54b8873f | 847 | if (!pn->users) { |
84c39451 G |
848 | /* default values */ |
849 | dn->dccp_loose = 1; | |
850 | dn->dccp_timeout[CT_DCCP_REQUEST] = 2 * DCCP_MSL; | |
851 | dn->dccp_timeout[CT_DCCP_RESPOND] = 4 * DCCP_MSL; | |
852 | dn->dccp_timeout[CT_DCCP_PARTOPEN] = 4 * DCCP_MSL; | |
853 | dn->dccp_timeout[CT_DCCP_OPEN] = 12 * 3600 * HZ; | |
854 | dn->dccp_timeout[CT_DCCP_CLOSEREQ] = 64 * HZ; | |
855 | dn->dccp_timeout[CT_DCCP_CLOSING] = 64 * HZ; | |
856 | dn->dccp_timeout[CT_DCCP_TIMEWAIT] = 2 * DCCP_MSL; | |
84c39451 | 857 | } |
54b8873f | 858 | |
464dc801 | 859 | return dccp_kmemdup_sysctl_table(net, pn, dn); |
84c39451 G |
860 | } |
861 | ||
c51d3901 | 862 | struct nf_conntrack_l4proto nf_conntrack_l4proto_dccp4 __read_mostly = { |
2bc78049 PM |
863 | .l3proto = AF_INET, |
864 | .l4proto = IPPROTO_DCCP, | |
865 | .name = "dccp", | |
866 | .pkt_to_tuple = dccp_pkt_to_tuple, | |
867 | .invert_tuple = dccp_invert_tuple, | |
868 | .new = dccp_new, | |
869 | .packet = dccp_packet, | |
2c8503f5 | 870 | .get_timeouts = dccp_get_timeouts, |
2bc78049 PM |
871 | .error = dccp_error, |
872 | .print_tuple = dccp_print_tuple, | |
873 | .print_conntrack = dccp_print_conntrack, | |
c0cd1156 | 874 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK) |
2bc78049 | 875 | .to_nlattr = dccp_to_nlattr, |
a400c30e | 876 | .nlattr_size = dccp_nlattr_size, |
2bc78049 PM |
877 | .from_nlattr = nlattr_to_dccp, |
878 | .tuple_to_nlattr = nf_ct_port_tuple_to_nlattr, | |
a400c30e | 879 | .nlattr_tuple_size = nf_ct_port_nlattr_tuple_size, |
2bc78049 PM |
880 | .nlattr_to_tuple = nf_ct_port_nlattr_to_tuple, |
881 | .nla_policy = nf_ct_port_nla_policy, | |
882 | #endif | |
50978462 PNA |
883 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) |
884 | .ctnl_timeout = { | |
885 | .nlattr_to_obj = dccp_timeout_nlattr_to_obj, | |
886 | .obj_to_nlattr = dccp_timeout_obj_to_nlattr, | |
887 | .nlattr_max = CTA_TIMEOUT_DCCP_MAX, | |
888 | .obj_size = sizeof(unsigned int) * CT_DCCP_MAX, | |
889 | .nla_policy = dccp_timeout_nla_policy, | |
890 | }, | |
891 | #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ | |
84c39451 | 892 | .init_net = dccp_init_net, |
2bc78049 | 893 | }; |
c51d3901 | 894 | EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_dccp4); |
2bc78049 | 895 | |
c51d3901 | 896 | struct nf_conntrack_l4proto nf_conntrack_l4proto_dccp6 __read_mostly = { |
2bc78049 PM |
897 | .l3proto = AF_INET6, |
898 | .l4proto = IPPROTO_DCCP, | |
899 | .name = "dccp", | |
900 | .pkt_to_tuple = dccp_pkt_to_tuple, | |
901 | .invert_tuple = dccp_invert_tuple, | |
902 | .new = dccp_new, | |
903 | .packet = dccp_packet, | |
2c8503f5 | 904 | .get_timeouts = dccp_get_timeouts, |
2bc78049 PM |
905 | .error = dccp_error, |
906 | .print_tuple = dccp_print_tuple, | |
907 | .print_conntrack = dccp_print_conntrack, | |
c0cd1156 | 908 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK) |
2bc78049 | 909 | .to_nlattr = dccp_to_nlattr, |
5ff48294 | 910 | .nlattr_size = dccp_nlattr_size, |
2bc78049 PM |
911 | .from_nlattr = nlattr_to_dccp, |
912 | .tuple_to_nlattr = nf_ct_port_tuple_to_nlattr, | |
a400c30e | 913 | .nlattr_tuple_size = nf_ct_port_nlattr_tuple_size, |
2bc78049 PM |
914 | .nlattr_to_tuple = nf_ct_port_nlattr_to_tuple, |
915 | .nla_policy = nf_ct_port_nla_policy, | |
916 | #endif | |
50978462 PNA |
917 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) |
918 | .ctnl_timeout = { | |
919 | .nlattr_to_obj = dccp_timeout_nlattr_to_obj, | |
920 | .obj_to_nlattr = dccp_timeout_obj_to_nlattr, | |
921 | .nlattr_max = CTA_TIMEOUT_DCCP_MAX, | |
922 | .obj_size = sizeof(unsigned int) * CT_DCCP_MAX, | |
923 | .nla_policy = dccp_timeout_nla_policy, | |
924 | }, | |
925 | #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ | |
84c39451 | 926 | .init_net = dccp_init_net, |
1546000f | 927 | }; |
c51d3901 | 928 | EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_dccp6); |