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Eric Dumazet e371589917 tcp: refine SYN handling in tcp_validate_incoming 
Followup of commit 0c24604b68 (tcp: implement RFC 5961 4.2)

As reported by Vijay Subramanian, we should send a challenge ACK
instead of a dup ack if a SYN flag is set on a packet received out of
window.

This permits the ratelimiting to work as intended, and to increase
correct SNMP counters.

Suggested-by: Vijay Subramanian <subramanian.vijay@gmail.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Vijay Subramanian <subramanian.vijay@gmail.com>
Cc: Kiran Kumar Kella <kkiran@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-07-18 09:31:25 -07:00
..
9p net: Fix (nearly-)kernel-doc comments for various functions 2012-07-10 23:13:45 -07:00
802 tokenring: delete all remaining driver support 2012-05-15 20:23:16 -04:00
8021q netpoll: move np->dev and np->dev_name init into __netpoll_setup() 2012-07-17 09:02:36 -07:00
appletalk net: Fix (nearly-)kernel-doc comments for various functions 2012-07-10 23:13:45 -07:00
atm net: Remove casts to same type 2012-06-04 11:45:11 -04:00
ax25 small cleanup in ax25_addr_parse() 2012-07-09 00:16:16 -07:00
batman-adv Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-07-10 23:56:33 -07:00
bluetooth Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless 2012-07-09 16:34:34 -04:00
bridge Merge branch 'nexthop_exceptions' 2012-07-17 10:48:26 -07:00
caif Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-06-28 17:37:00 -07:00
can can: gw: Remove pointless casts 2012-07-10 22:36:17 +02:00
ceph net: Fix non-kernel-doc comments with kernel-doc start marker 2012-07-10 23:13:45 -07:00
core netpoll: move np->dev and np->dev_name init into __netpoll_setup() 2012-07-17 09:02:36 -07:00
dcb net: Fix non-kernel-doc comments with kernel-doc start marker 2012-07-10 23:13:45 -07:00
dccp net: Pass optional SKB and SK arguments to dst_ops->{update_pmtu,redirect}() 2012-07-17 03:29:28 -07:00
decnet net: Pass optional SKB and SK arguments to dst_ops->{update_pmtu,redirect}() 2012-07-17 03:29:28 -07:00
dns_resolver Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2012-05-21 20:27:36 -07:00
dsa dsa: Convert compare_ether_addr to ether_addr_equal 2012-05-09 20:49:19 -04:00
ethernet net: Fix (nearly-)kernel-doc comments for various functions 2012-07-10 23:13:45 -07:00
ieee802154 6lowpan: Change byte order when storing/accessing to len field 2012-07-16 22:52:02 -07:00
ipv4 tcp: refine SYN handling in tcp_validate_incoming 2012-07-18 09:31:25 -07:00
ipv6 ipv6: fix inet6_csk_xmit() 2012-07-18 08:59:58 -07:00
ipx ipx: Remove spurious NULL checking in ipx_ioctl(). 2012-05-19 00:51:04 -04:00
irda irda: Fix typo in irda 2012-07-16 23:23:52 -07:00
iucv net: remove skb_orphan_try() 2012-06-15 15:30:15 -07:00
key
l2tp net: l2tp_eth: provide tx_dropped counter 2012-06-29 00:52:32 -07:00
lapb lapb: Neaten debugging 2012-05-17 18:45:20 -04:00
llc net: Fix (nearly-)kernel-doc comments for various functions 2012-07-10 23:13:45 -07:00
mac80211 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem 2012-07-12 13:44:50 -04:00
mac802154 mac802154: sparse warnings: make symbols static 2012-07-12 07:54:45 -07:00
netfilter net: Pass optional SKB and SK arguments to dst_ops->{update_pmtu,redirect}() 2012-07-17 03:29:28 -07:00
netlabel
netlink net: Fix (nearly-)kernel-doc comments for various functions 2012-07-10 23:13:45 -07:00
netrom
nfc Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem 2012-07-12 13:44:50 -04:00
openvswitch Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-16 22:17:37 -04:00
packet net: added support for 40GbE link. 2012-06-27 15:42:24 -07:00
phonet net: remove my future former mail address 2012-06-17 16:29:38 -07:00
rds net: Fix (nearly-)kernel-doc comments for various functions 2012-07-10 23:13:45 -07:00
rfkill rfkill: Add the capability to switch all devices of all type in __rfkill_switch_all(). 2012-06-06 15:18:17 -04:00
rose
rxrpc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-07-10 23:56:33 -07:00
sched netem: refine early skb orphaning 2012-07-16 23:08:33 -07:00
sctp Merge branch 'nexthop_exceptions' 2012-07-17 10:48:26 -07:00
sunrpc net: Fix (nearly-)kernel-doc comments for various functions 2012-07-10 23:13:45 -07:00
tipc tipc: remove print_buf and deprecated log buffer code 2012-07-13 19:34:43 -04:00
unix net: make sock diag per-namespace 2012-07-16 22:31:34 -07:00
wanrouter net/wanrouter: Deprecate and schedule for removal 2012-05-24 16:22:53 -04:00
wimax
wireless Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem 2012-07-12 13:44:50 -04:00
x25 net: Fix (nearly-)kernel-doc comments for various functions 2012-07-10 23:13:45 -07:00
xfrm xfrm: Initialize the struct xfrm_dst behind the dst_enty field 2012-07-14 00:29:12 -07:00
compat.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2012-05-21 20:27:36 -07:00
Kconfig net: drop NET dependency from HAVE_BPF_JIT 2012-05-21 12:50:12 -07:00
Makefile econet: remove ancient bug ridden protocol 2012-05-18 01:35:08 -04:00
nonet.c
socket.c Merge branch 'for-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2012-05-22 17:37:47 -07:00
sysctl_net.c net: delete all instances of special processing for token ring 2012-05-15 20:14:35 -04:00