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[SCTP]: Fix protocol violation when receiving an error lenght INIT-ACK

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When receiving an error length INIT-ACK during COOKIE-WAIT,
a 0-vtag ABORT will be responsed. This action violates the
protocol apparently. This patch achieves the following things.
1 If the INIT-ACK contains all the fixed parameters, use init-tag
  recorded from INIT-ACK as vtag.
2 If the INIT-ACK doesn't contain all the fixed parameters,
  just reflect its vtag.

Signed-off-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gui Jianfeng
2008-04-12 18:39:34 -07:00
committed by David S. Miller
parent 72da7b3860
commit f4ad85ca3e
4 changed files with 25 additions and 0 deletions
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3
net/sctp/outqueue.c
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@@ -793,6 +793,9 @@ int sctp_outq_flush(struct sctp_outq *q, int rtx_timeout)
break;
case SCTP_CID_ABORT:
if (sctp_test_T_bit(chunk)) {
packet->vtag = asoc->c.my_vtag;
}
case SCTP_CID_SACK:
case SCTP_CID_HEARTBEAT:
case SCTP_CID_HEARTBEAT_ACK: