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| author |   Florian Westphal <fw@strlen.de> | 2010-06-16 14:42:15 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2010-06-16 14:42:15 -0700 |
| commit | 8c76368174ed2359739f1b7b8a9c042b1ef839c4 (patch) | |
| tree | 143aa28c9438b24154bc3d1e36b432a534eca50c /drivers | |
| parent | inetpeer: restore small inet_peer structures (diff) | |
| download | linux-dev-8c76368174ed2359739f1b7b8a9c042b1ef839c4.tar.xz linux-dev-8c76368174ed2359739f1b7b8a9c042b1ef839c4.zip | |
syncookies: check decoded options against sysctl settings
Discard the ACK if we find options that do not match current sysctl
settings.
Previously it was possible to create a connection with sack, wscale,
etc. enabled even if the feature was disabled via sysctl.
Also remove an unneeded call to tcp_sack_reset() in
cookie_check_timestamp: Both call sites (cookie_v4_check,
cookie_v6_check) zero "struct tcp_options_received", hand it to
tcp_parse_options() (which does not change tcp_opt->num_sacks/dsack)
and then call cookie_check_timestamp().
Even if num_sacks/dsacks were changed, the structure is allocated on
the stack and after cookie_check_timestamp returns only a few selected
members are copied to the inet_request_sock.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions