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| author | Eric Dumazet <edumazet@google.com> | 2012-07-17 01:41:30 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-11 09:03:48 -0800 |
| commit | ab5c718d0fd643ba6f2112235e12ea5222f4edf3 (patch) | |
| tree | 02a32971cc7cc44623e78292bf54b2056268dbf3 /net/ipv4/inet_connection_sock.c | |
| parent | 86791bbfe5ed7b275be040cfeff049a1624af1b7 (diff) | |
| download | kernel_samsung_aries-ab5c718d0fd643ba6f2112235e12ea5222f4edf3.zip kernel_samsung_aries-ab5c718d0fd643ba6f2112235e12ea5222f4edf3.tar.gz kernel_samsung_aries-ab5c718d0fd643ba6f2112235e12ea5222f4edf3.tar.bz2 | |
tcp: implement RFC 5961 4.2
[ Upstream commit 0c24604b68fc7810d429d6c3657b6f148270e528 ]
Implement the RFC 5691 mitigation against Blind
Reset attack using SYN bit.
Section 4.2 of RFC 5961 advises to send a Challenge ACK and drop
incoming packet, instead of resetting the session.
Add a new SNMP counter to count number of challenge acks sent
in response to SYN packets.
(netstat -s | grep TCPSYNChallenge)
Remove obsolete TCPAbortOnSyn, since we no longer abort a TCP session
because of a SYN flag.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Kiran Kumar Kella <kkiran@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/ipv4/inet_connection_sock.c')
0 files changed, 0 insertions, 0 deletions