diff options
| author | Stephen Hemminger <[email protected]> | 2007-10-11 00:30:46 +0000 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2007-10-11 00:30:46 +0000 |
| commit | 227b60f5102cda4e4ab792b526a59c8cb20cd9f8 (patch) | |
| tree | 2c9e372601ba794894833b0618bc531a9f5d57c4 /net/ipv4/tcp_ipv4.c | |
| parent | [SCTP]: port randomization (diff) | |
| download | kernel-227b60f5102cda4e4ab792b526a59c8cb20cd9f8.tar.gz kernel-227b60f5102cda4e4ab792b526a59c8cb20cd9f8.zip | |
[INET]: local port range robustness
Expansion of original idea from Denis V. Lunev <[email protected]>
Add robustness and locking to the local_port_range sysctl.
1. Enforce that low < high when setting.
2. Use seqlock to ensure atomic update.
The locking might seem like overkill, but there are
cases where sysadmin might want to change value in the
middle of a DoS attack.
Signed-off-by: Stephen Hemminger <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'net/ipv4/tcp_ipv4.c')
| -rw-r--r-- | net/ipv4/tcp_ipv4.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 8855e640e958..38cf73a56731 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -2470,6 +2470,5 @@ EXPORT_SYMBOL(tcp_v4_syn_recv_sock); EXPORT_SYMBOL(tcp_proc_register); EXPORT_SYMBOL(tcp_proc_unregister); #endif -EXPORT_SYMBOL(sysctl_local_port_range); EXPORT_SYMBOL(sysctl_tcp_low_latency); |