1 #include <linux/kernel.h>
3 #include <linux/sctp.h>
5 #include <net/ip6_checksum.h>
6 #include <linux/netfilter.h>
7 #include <linux/netfilter_ipv4.h>
8 #include <net/sctp/checksum.h>
12 sctp_conn_schedule(int af
, struct sk_buff
*skb
, struct ip_vs_proto_data
*pd
,
13 int *verdict
, struct ip_vs_conn
**cpp
,
14 struct ip_vs_iphdr
*iph
)
17 struct ip_vs_service
*svc
;
18 struct netns_ipvs
*ipvs
;
19 sctp_chunkhdr_t _schunkh
, *sch
;
20 sctp_sctphdr_t
*sh
, _sctph
;
22 sh
= skb_header_pointer(skb
, iph
->len
, sizeof(_sctph
), &_sctph
);
28 sch
= skb_header_pointer(skb
, iph
->len
+ sizeof(sctp_sctphdr_t
),
29 sizeof(_schunkh
), &_schunkh
);
38 if ((sch
->type
== SCTP_CID_INIT
|| sysctl_sloppy_sctp(ipvs
)) &&
39 (svc
= ip_vs_service_find(net
, af
, skb
->mark
, iph
->protocol
,
40 &iph
->daddr
, sh
->dest
))) {
43 if (ip_vs_todrop(ipvs
)) {
45 * It seems that we are very loaded.
46 * We have to drop this packet :(
53 * Let the virtual server select a real server for the
54 * incoming connection, and create a connection entry.
56 *cpp
= ip_vs_schedule(svc
, skb
, pd
, &ignored
, iph
);
57 if (!*cpp
&& ignored
<= 0) {
59 *verdict
= ip_vs_leave(svc
, skb
, pd
, iph
);
71 static void sctp_nat_csum(struct sk_buff
*skb
, sctp_sctphdr_t
*sctph
,
72 unsigned int sctphoff
)
74 sctph
->checksum
= sctp_compute_cksum(skb
, sctphoff
);
75 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
79 sctp_snat_handler(struct sk_buff
*skb
, struct ip_vs_protocol
*pp
,
80 struct ip_vs_conn
*cp
, struct ip_vs_iphdr
*iph
)
82 sctp_sctphdr_t
*sctph
;
83 unsigned int sctphoff
= iph
->len
;
84 bool payload_csum
= false;
86 #ifdef CONFIG_IP_VS_IPV6
87 if (cp
->af
== AF_INET6
&& iph
->fragoffs
)
91 /* csum_check requires unshared skb */
92 if (!skb_make_writable(skb
, sctphoff
+ sizeof(*sctph
)))
95 if (unlikely(cp
->app
!= NULL
)) {
98 /* Some checks before mangling */
99 if (pp
->csum_check
&& !pp
->csum_check(cp
->af
, skb
, pp
))
102 /* Call application helper if needed */
103 ret
= ip_vs_app_pkt_out(cp
, skb
);
106 /* ret=2: csum update is needed after payload mangling */
111 sctph
= (void *) skb_network_header(skb
) + sctphoff
;
113 /* Only update csum if we really have to */
114 if (sctph
->source
!= cp
->vport
|| payload_csum
||
115 skb
->ip_summed
== CHECKSUM_PARTIAL
) {
116 sctph
->source
= cp
->vport
;
117 sctp_nat_csum(skb
, sctph
, sctphoff
);
119 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
126 sctp_dnat_handler(struct sk_buff
*skb
, struct ip_vs_protocol
*pp
,
127 struct ip_vs_conn
*cp
, struct ip_vs_iphdr
*iph
)
129 sctp_sctphdr_t
*sctph
;
130 unsigned int sctphoff
= iph
->len
;
131 bool payload_csum
= false;
133 #ifdef CONFIG_IP_VS_IPV6
134 if (cp
->af
== AF_INET6
&& iph
->fragoffs
)
138 /* csum_check requires unshared skb */
139 if (!skb_make_writable(skb
, sctphoff
+ sizeof(*sctph
)))
142 if (unlikely(cp
->app
!= NULL
)) {
145 /* Some checks before mangling */
146 if (pp
->csum_check
&& !pp
->csum_check(cp
->af
, skb
, pp
))
149 /* Call application helper if needed */
150 ret
= ip_vs_app_pkt_in(cp
, skb
);
153 /* ret=2: csum update is needed after payload mangling */
158 sctph
= (void *) skb_network_header(skb
) + sctphoff
;
160 /* Only update csum if we really have to */
161 if (sctph
->dest
!= cp
->dport
|| payload_csum
||
162 (skb
->ip_summed
== CHECKSUM_PARTIAL
&&
163 !(skb_dst(skb
)->dev
->features
& NETIF_F_SCTP_CSUM
))) {
164 sctph
->dest
= cp
->dport
;
165 sctp_nat_csum(skb
, sctph
, sctphoff
);
166 } else if (skb
->ip_summed
!= CHECKSUM_PARTIAL
) {
167 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
174 sctp_csum_check(int af
, struct sk_buff
*skb
, struct ip_vs_protocol
*pp
)
176 unsigned int sctphoff
;
177 struct sctphdr
*sh
, _sctph
;
180 #ifdef CONFIG_IP_VS_IPV6
182 sctphoff
= sizeof(struct ipv6hdr
);
185 sctphoff
= ip_hdrlen(skb
);
187 sh
= skb_header_pointer(skb
, sctphoff
, sizeof(_sctph
), &_sctph
);
192 val
= sctp_compute_cksum(skb
, sctphoff
);
195 /* CRC failure, dump it. */
196 IP_VS_DBG_RL_PKT(0, af
, pp
, skb
, 0,
197 "Failed checksum for");
203 enum ipvs_sctp_event_t
{
204 IP_VS_SCTP_DATA
= 0, /* DATA, SACK, HEARTBEATs */
207 IP_VS_SCTP_COOKIE_ECHO
,
208 IP_VS_SCTP_COOKIE_ACK
,
210 IP_VS_SCTP_SHUTDOWN_ACK
,
211 IP_VS_SCTP_SHUTDOWN_COMPLETE
,
214 IP_VS_SCTP_EVENT_LAST
217 /* RFC 2960, 3.2 Chunk Field Descriptions */
218 static __u8 sctp_events
[] = {
219 [SCTP_CID_DATA
] = IP_VS_SCTP_DATA
,
220 [SCTP_CID_INIT
] = IP_VS_SCTP_INIT
,
221 [SCTP_CID_INIT_ACK
] = IP_VS_SCTP_INIT_ACK
,
222 [SCTP_CID_SACK
] = IP_VS_SCTP_DATA
,
223 [SCTP_CID_HEARTBEAT
] = IP_VS_SCTP_DATA
,
224 [SCTP_CID_HEARTBEAT_ACK
] = IP_VS_SCTP_DATA
,
225 [SCTP_CID_ABORT
] = IP_VS_SCTP_ABORT
,
226 [SCTP_CID_SHUTDOWN
] = IP_VS_SCTP_SHUTDOWN
,
227 [SCTP_CID_SHUTDOWN_ACK
] = IP_VS_SCTP_SHUTDOWN_ACK
,
228 [SCTP_CID_ERROR
] = IP_VS_SCTP_ERROR
,
229 [SCTP_CID_COOKIE_ECHO
] = IP_VS_SCTP_COOKIE_ECHO
,
230 [SCTP_CID_COOKIE_ACK
] = IP_VS_SCTP_COOKIE_ACK
,
231 [SCTP_CID_ECN_ECNE
] = IP_VS_SCTP_DATA
,
232 [SCTP_CID_ECN_CWR
] = IP_VS_SCTP_DATA
,
233 [SCTP_CID_SHUTDOWN_COMPLETE
] = IP_VS_SCTP_SHUTDOWN_COMPLETE
,
237 * See RFC 2960, 4. SCTP Association State Diagram
239 * New states (not in diagram):
240 * - INIT1 state: use shorter timeout for dropped INIT packets
241 * - REJECTED state: use shorter timeout if INIT is rejected with ABORT
242 * - INIT, COOKIE_SENT, COOKIE_REPLIED, COOKIE states: for better debugging
244 * The states are as seen in real server. In the diagram, INIT1, INIT,
245 * COOKIE_SENT and COOKIE_REPLIED processing happens in CLOSED state.
247 * States as per packets from client (C) and server (S):
249 * Setup of client connection:
250 * IP_VS_SCTP_S_INIT1: First C:INIT sent, wait for S:INIT-ACK
251 * IP_VS_SCTP_S_INIT: Next C:INIT sent, wait for S:INIT-ACK
252 * IP_VS_SCTP_S_COOKIE_SENT: S:INIT-ACK sent, wait for C:COOKIE-ECHO
253 * IP_VS_SCTP_S_COOKIE_REPLIED: C:COOKIE-ECHO sent, wait for S:COOKIE-ACK
255 * Setup of server connection:
256 * IP_VS_SCTP_S_COOKIE_WAIT: S:INIT sent, wait for C:INIT-ACK
257 * IP_VS_SCTP_S_COOKIE: C:INIT-ACK sent, wait for S:COOKIE-ECHO
258 * IP_VS_SCTP_S_COOKIE_ECHOED: S:COOKIE-ECHO sent, wait for C:COOKIE-ACK
261 #define sNO IP_VS_SCTP_S_NONE
262 #define sI1 IP_VS_SCTP_S_INIT1
263 #define sIN IP_VS_SCTP_S_INIT
264 #define sCS IP_VS_SCTP_S_COOKIE_SENT
265 #define sCR IP_VS_SCTP_S_COOKIE_REPLIED
266 #define sCW IP_VS_SCTP_S_COOKIE_WAIT
267 #define sCO IP_VS_SCTP_S_COOKIE
268 #define sCE IP_VS_SCTP_S_COOKIE_ECHOED
269 #define sES IP_VS_SCTP_S_ESTABLISHED
270 #define sSS IP_VS_SCTP_S_SHUTDOWN_SENT
271 #define sSR IP_VS_SCTP_S_SHUTDOWN_RECEIVED
272 #define sSA IP_VS_SCTP_S_SHUTDOWN_ACK_SENT
273 #define sRJ IP_VS_SCTP_S_REJECTED
274 #define sCL IP_VS_SCTP_S_CLOSED
276 static const __u8 sctp_states
277 [IP_VS_DIR_LAST
][IP_VS_SCTP_EVENT_LAST
][IP_VS_SCTP_S_LAST
] = {
279 /* sNO, sI1, sIN, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL*/
280 /* d */{sES
, sI1
, sIN
, sCS
, sCR
, sCW
, sCO
, sCE
, sES
, sSS
, sSR
, sSA
, sRJ
, sCL
},
281 /* i */{sI1
, sIN
, sIN
, sCS
, sCR
, sCW
, sCO
, sCE
, sES
, sSS
, sSR
, sSA
, sIN
, sIN
},
282 /* i_a */{sCW
, sCW
, sCW
, sCS
, sCR
, sCO
, sCO
, sCE
, sES
, sSS
, sSR
, sSA
, sRJ
, sCL
},
283 /* c_e */{sCR
, sIN
, sIN
, sCR
, sCR
, sCW
, sCO
, sCE
, sES
, sSS
, sSR
, sSA
, sRJ
, sCL
},
284 /* c_a */{sES
, sI1
, sIN
, sCS
, sCR
, sCW
, sCO
, sES
, sES
, sSS
, sSR
, sSA
, sRJ
, sCL
},
285 /* s */{sSR
, sI1
, sIN
, sCS
, sCR
, sCW
, sCO
, sCE
, sSR
, sSS
, sSR
, sSA
, sRJ
, sCL
},
286 /* s_a */{sCL
, sIN
, sIN
, sCS
, sCR
, sCW
, sCO
, sCE
, sES
, sCL
, sSR
, sCL
, sRJ
, sCL
},
287 /* s_c */{sCL
, sCL
, sCL
, sCS
, sCR
, sCW
, sCO
, sCE
, sES
, sSS
, sSR
, sCL
, sRJ
, sCL
},
288 /* err */{sCL
, sI1
, sIN
, sCS
, sCR
, sCW
, sCO
, sCL
, sES
, sSS
, sSR
, sSA
, sRJ
, sCL
},
289 /* ab */{sCL
, sCL
, sCL
, sCL
, sCL
, sRJ
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
},
292 /* sNO, sI1, sIN, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL*/
293 /* d */{sES
, sI1
, sIN
, sCS
, sCR
, sCW
, sCO
, sCE
, sES
, sSS
, sSR
, sSA
, sRJ
, sCL
},
294 /* i */{sCW
, sCW
, sCW
, sCW
, sCW
, sCW
, sCW
, sCW
, sES
, sCW
, sCW
, sCW
, sCW
, sCW
},
295 /* i_a */{sCS
, sCS
, sCS
, sCS
, sCR
, sCW
, sCO
, sCE
, sES
, sSS
, sSR
, sSA
, sRJ
, sCL
},
296 /* c_e */{sCE
, sCE
, sCE
, sCE
, sCE
, sCE
, sCE
, sCE
, sES
, sSS
, sSR
, sSA
, sRJ
, sCL
},
297 /* c_a */{sES
, sES
, sES
, sES
, sES
, sES
, sES
, sES
, sES
, sSS
, sSR
, sSA
, sRJ
, sCL
},
298 /* s */{sSS
, sSS
, sSS
, sSS
, sSS
, sSS
, sSS
, sSS
, sSS
, sSS
, sSR
, sSA
, sRJ
, sCL
},
299 /* s_a */{sSA
, sSA
, sSA
, sSA
, sSA
, sCW
, sCO
, sCE
, sES
, sSA
, sSA
, sSA
, sRJ
, sCL
},
300 /* s_c */{sCL
, sI1
, sIN
, sCS
, sCR
, sCW
, sCO
, sCE
, sES
, sSS
, sSR
, sSA
, sRJ
, sCL
},
301 /* err */{sCL
, sCL
, sCL
, sCL
, sCL
, sCW
, sCO
, sCE
, sES
, sSS
, sSR
, sSA
, sRJ
, sCL
},
302 /* ab */{sCL
, sRJ
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
},
305 /* sNO, sI1, sIN, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL*/
306 /* d */{sES
, sI1
, sIN
, sCS
, sCR
, sES
, sCO
, sCE
, sES
, sSS
, sSR
, sSA
, sRJ
, sCL
},
307 /* i */{sI1
, sIN
, sIN
, sIN
, sIN
, sIN
, sCO
, sCE
, sES
, sSS
, sSR
, sSA
, sIN
, sIN
},
308 /* i_a */{sCE
, sCE
, sCE
, sCE
, sCE
, sCE
, sCO
, sCE
, sES
, sSS
, sSR
, sSA
, sRJ
, sCL
},
309 /* c_e */{sES
, sES
, sES
, sES
, sES
, sES
, sCO
, sCE
, sES
, sSS
, sSR
, sSA
, sRJ
, sCL
},
310 /* c_a */{sES
, sI1
, sIN
, sES
, sES
, sCW
, sES
, sES
, sES
, sSS
, sSR
, sSA
, sRJ
, sCL
},
311 /* s */{sSR
, sI1
, sIN
, sCS
, sCR
, sCW
, sCO
, sCE
, sSR
, sSS
, sSR
, sSA
, sRJ
, sCL
},
312 /* s_a */{sCL
, sIN
, sIN
, sCS
, sCR
, sCW
, sCO
, sCE
, sCL
, sCL
, sSR
, sCL
, sRJ
, sCL
},
313 /* s_c */{sCL
, sCL
, sCL
, sCL
, sCL
, sCW
, sCO
, sCE
, sES
, sSS
, sCL
, sCL
, sRJ
, sCL
},
314 /* err */{sCL
, sI1
, sIN
, sCS
, sCR
, sCW
, sCO
, sCE
, sES
, sSS
, sSR
, sSA
, sRJ
, sCL
},
315 /* ab */{sCL
, sCL
, sCL
, sCL
, sCL
, sRJ
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
, sCL
},
319 #define IP_VS_SCTP_MAX_RTO ((60 + 1) * HZ)
321 /* Timeout table[state] */
322 static const int sctp_timeouts
[IP_VS_SCTP_S_LAST
+ 1] = {
323 [IP_VS_SCTP_S_NONE
] = 2 * HZ
,
324 [IP_VS_SCTP_S_INIT1
] = (0 + 3 + 1) * HZ
,
325 [IP_VS_SCTP_S_INIT
] = IP_VS_SCTP_MAX_RTO
,
326 [IP_VS_SCTP_S_COOKIE_SENT
] = IP_VS_SCTP_MAX_RTO
,
327 [IP_VS_SCTP_S_COOKIE_REPLIED
] = IP_VS_SCTP_MAX_RTO
,
328 [IP_VS_SCTP_S_COOKIE_WAIT
] = IP_VS_SCTP_MAX_RTO
,
329 [IP_VS_SCTP_S_COOKIE
] = IP_VS_SCTP_MAX_RTO
,
330 [IP_VS_SCTP_S_COOKIE_ECHOED
] = IP_VS_SCTP_MAX_RTO
,
331 [IP_VS_SCTP_S_ESTABLISHED
] = 15 * 60 * HZ
,
332 [IP_VS_SCTP_S_SHUTDOWN_SENT
] = IP_VS_SCTP_MAX_RTO
,
333 [IP_VS_SCTP_S_SHUTDOWN_RECEIVED
] = IP_VS_SCTP_MAX_RTO
,
334 [IP_VS_SCTP_S_SHUTDOWN_ACK_SENT
] = IP_VS_SCTP_MAX_RTO
,
335 [IP_VS_SCTP_S_REJECTED
] = (0 + 3 + 1) * HZ
,
336 [IP_VS_SCTP_S_CLOSED
] = IP_VS_SCTP_MAX_RTO
,
337 [IP_VS_SCTP_S_LAST
] = 2 * HZ
,
340 static const char *sctp_state_name_table
[IP_VS_SCTP_S_LAST
+ 1] = {
341 [IP_VS_SCTP_S_NONE
] = "NONE",
342 [IP_VS_SCTP_S_INIT1
] = "INIT1",
343 [IP_VS_SCTP_S_INIT
] = "INIT",
344 [IP_VS_SCTP_S_COOKIE_SENT
] = "C-SENT",
345 [IP_VS_SCTP_S_COOKIE_REPLIED
] = "C-REPLIED",
346 [IP_VS_SCTP_S_COOKIE_WAIT
] = "C-WAIT",
347 [IP_VS_SCTP_S_COOKIE
] = "COOKIE",
348 [IP_VS_SCTP_S_COOKIE_ECHOED
] = "C-ECHOED",
349 [IP_VS_SCTP_S_ESTABLISHED
] = "ESTABLISHED",
350 [IP_VS_SCTP_S_SHUTDOWN_SENT
] = "S-SENT",
351 [IP_VS_SCTP_S_SHUTDOWN_RECEIVED
] = "S-RECEIVED",
352 [IP_VS_SCTP_S_SHUTDOWN_ACK_SENT
] = "S-ACK-SENT",
353 [IP_VS_SCTP_S_REJECTED
] = "REJECTED",
354 [IP_VS_SCTP_S_CLOSED
] = "CLOSED",
355 [IP_VS_SCTP_S_LAST
] = "BUG!",
359 static const char *sctp_state_name(int state
)
361 if (state
>= IP_VS_SCTP_S_LAST
)
363 if (sctp_state_name_table
[state
])
364 return sctp_state_name_table
[state
];
369 set_sctp_state(struct ip_vs_proto_data
*pd
, struct ip_vs_conn
*cp
,
370 int direction
, const struct sk_buff
*skb
)
372 sctp_chunkhdr_t _sctpch
, *sch
;
373 unsigned char chunk_type
;
374 int event
, next_state
;
377 #ifdef CONFIG_IP_VS_IPV6
378 ihl
= cp
->af
== AF_INET
? ip_hdrlen(skb
) : sizeof(struct ipv6hdr
);
380 ihl
= ip_hdrlen(skb
);
383 cofs
= ihl
+ sizeof(sctp_sctphdr_t
);
384 sch
= skb_header_pointer(skb
, cofs
, sizeof(_sctpch
), &_sctpch
);
388 chunk_type
= sch
->type
;
390 * Section 3: Multiple chunks can be bundled into one SCTP packet
391 * up to the MTU size, except for the INIT, INIT ACK, and
392 * SHUTDOWN COMPLETE chunks. These chunks MUST NOT be bundled with
393 * any other chunk in a packet.
395 * Section 3.3.7: DATA chunks MUST NOT be bundled with ABORT. Control
396 * chunks (except for INIT, INIT ACK, and SHUTDOWN COMPLETE) MAY be
397 * bundled with an ABORT, but they MUST be placed before the ABORT
398 * in the SCTP packet or they will be ignored by the receiver.
400 if ((sch
->type
== SCTP_CID_COOKIE_ECHO
) ||
401 (sch
->type
== SCTP_CID_COOKIE_ACK
)) {
402 int clen
= ntohs(sch
->length
);
404 if (clen
>= sizeof(sctp_chunkhdr_t
)) {
405 sch
= skb_header_pointer(skb
, cofs
+ ALIGN(clen
, 4),
406 sizeof(_sctpch
), &_sctpch
);
407 if (sch
&& sch
->type
== SCTP_CID_ABORT
)
408 chunk_type
= sch
->type
;
412 event
= (chunk_type
< sizeof(sctp_events
)) ?
413 sctp_events
[chunk_type
] : IP_VS_SCTP_DATA
;
415 /* Update direction to INPUT_ONLY if necessary
416 * or delete NO_OUTPUT flag if output packet detected
418 if (cp
->flags
& IP_VS_CONN_F_NOOUTPUT
) {
419 if (direction
== IP_VS_DIR_OUTPUT
)
420 cp
->flags
&= ~IP_VS_CONN_F_NOOUTPUT
;
422 direction
= IP_VS_DIR_INPUT_ONLY
;
425 next_state
= sctp_states
[direction
][event
][cp
->state
];
427 if (next_state
!= cp
->state
) {
428 struct ip_vs_dest
*dest
= cp
->dest
;
430 IP_VS_DBG_BUF(8, "%s %s %s:%d->"
431 "%s:%d state: %s->%s conn->refcnt:%d\n",
433 ((direction
== IP_VS_DIR_OUTPUT
) ?
434 "output " : "input "),
435 IP_VS_DBG_ADDR(cp
->daf
, &cp
->daddr
),
437 IP_VS_DBG_ADDR(cp
->af
, &cp
->caddr
),
439 sctp_state_name(cp
->state
),
440 sctp_state_name(next_state
),
441 atomic_read(&cp
->refcnt
));
443 if (!(cp
->flags
& IP_VS_CONN_F_INACTIVE
) &&
444 (next_state
!= IP_VS_SCTP_S_ESTABLISHED
)) {
445 atomic_dec(&dest
->activeconns
);
446 atomic_inc(&dest
->inactconns
);
447 cp
->flags
|= IP_VS_CONN_F_INACTIVE
;
448 } else if ((cp
->flags
& IP_VS_CONN_F_INACTIVE
) &&
449 (next_state
== IP_VS_SCTP_S_ESTABLISHED
)) {
450 atomic_inc(&dest
->activeconns
);
451 atomic_dec(&dest
->inactconns
);
452 cp
->flags
&= ~IP_VS_CONN_F_INACTIVE
;
457 cp
->timeout
= pd
->timeout_table
[cp
->state
= next_state
];
458 else /* What to do ? */
459 cp
->timeout
= sctp_timeouts
[cp
->state
= next_state
];
463 sctp_state_transition(struct ip_vs_conn
*cp
, int direction
,
464 const struct sk_buff
*skb
, struct ip_vs_proto_data
*pd
)
466 spin_lock_bh(&cp
->lock
);
467 set_sctp_state(pd
, cp
, direction
, skb
);
468 spin_unlock_bh(&cp
->lock
);
471 static inline __u16
sctp_app_hashkey(__be16 port
)
473 return (((__force u16
)port
>> SCTP_APP_TAB_BITS
) ^ (__force u16
)port
)
477 static int sctp_register_app(struct net
*net
, struct ip_vs_app
*inc
)
481 __be16 port
= inc
->port
;
483 struct netns_ipvs
*ipvs
= net_ipvs(net
);
484 struct ip_vs_proto_data
*pd
= ip_vs_proto_data_get(net
, IPPROTO_SCTP
);
486 hash
= sctp_app_hashkey(port
);
488 list_for_each_entry(i
, &ipvs
->sctp_apps
[hash
], p_list
) {
489 if (i
->port
== port
) {
494 list_add_rcu(&inc
->p_list
, &ipvs
->sctp_apps
[hash
]);
495 atomic_inc(&pd
->appcnt
);
501 static void sctp_unregister_app(struct net
*net
, struct ip_vs_app
*inc
)
503 struct ip_vs_proto_data
*pd
= ip_vs_proto_data_get(net
, IPPROTO_SCTP
);
505 atomic_dec(&pd
->appcnt
);
506 list_del_rcu(&inc
->p_list
);
509 static int sctp_app_conn_bind(struct ip_vs_conn
*cp
)
511 struct netns_ipvs
*ipvs
= net_ipvs(ip_vs_conn_net(cp
));
513 struct ip_vs_app
*inc
;
516 /* Default binding: bind app only for NAT */
517 if (IP_VS_FWD_METHOD(cp
) != IP_VS_CONN_F_MASQ
)
519 /* Lookup application incarnations and bind the right one */
520 hash
= sctp_app_hashkey(cp
->vport
);
523 list_for_each_entry_rcu(inc
, &ipvs
->sctp_apps
[hash
], p_list
) {
524 if (inc
->port
== cp
->vport
) {
525 if (unlikely(!ip_vs_app_inc_get(inc
)))
529 IP_VS_DBG_BUF(9, "%s: Binding conn %s:%u->"
530 "%s:%u to app %s on port %u\n",
532 IP_VS_DBG_ADDR(cp
->af
, &cp
->caddr
),
534 IP_VS_DBG_ADDR(cp
->af
, &cp
->vaddr
),
536 inc
->name
, ntohs(inc
->port
));
539 result
= inc
->init_conn(inc
, cp
);
548 /* ---------------------------------------------
549 * timeouts is netns related now.
550 * ---------------------------------------------
552 static int __ip_vs_sctp_init(struct net
*net
, struct ip_vs_proto_data
*pd
)
554 struct netns_ipvs
*ipvs
= net_ipvs(net
);
556 ip_vs_init_hash_table(ipvs
->sctp_apps
, SCTP_APP_TAB_SIZE
);
557 pd
->timeout_table
= ip_vs_create_timeout_table((int *)sctp_timeouts
,
558 sizeof(sctp_timeouts
));
559 if (!pd
->timeout_table
)
564 static void __ip_vs_sctp_exit(struct net
*net
, struct ip_vs_proto_data
*pd
)
566 kfree(pd
->timeout_table
);
569 struct ip_vs_protocol ip_vs_protocol_sctp
= {
571 .protocol
= IPPROTO_SCTP
,
572 .num_states
= IP_VS_SCTP_S_LAST
,
576 .init_netns
= __ip_vs_sctp_init
,
577 .exit_netns
= __ip_vs_sctp_exit
,
578 .register_app
= sctp_register_app
,
579 .unregister_app
= sctp_unregister_app
,
580 .conn_schedule
= sctp_conn_schedule
,
581 .conn_in_get
= ip_vs_conn_in_get_proto
,
582 .conn_out_get
= ip_vs_conn_out_get_proto
,
583 .snat_handler
= sctp_snat_handler
,
584 .dnat_handler
= sctp_dnat_handler
,
585 .csum_check
= sctp_csum_check
,
586 .state_name
= sctp_state_name
,
587 .state_transition
= sctp_state_transition
,
588 .app_conn_bind
= sctp_app_conn_bind
,
589 .debug_packet
= ip_vs_tcpudp_debug_packet
,
590 .timeout_change
= NULL
,