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authorHerbert Xu <herbert@gondor.apana.org.au>2005-12-13 23:14:27 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2006-01-03 13:10:31 -0800
commit89cee8b1cbb9dac40c92ef1968aea2b45f82fd18 (patch)
tree01049841b15a9c2f3f136710382c7e4c11c1b1e5 /net/ipv4/sysctl_net_ipv4.c
parentd5228a4f49db32d22a39c653281b527ef371129c (diff)
downloadblackbird-op-linux-89cee8b1cbb9dac40c92ef1968aea2b45f82fd18.tar.gz
blackbird-op-linux-89cee8b1cbb9dac40c92ef1968aea2b45f82fd18.zip
[IPV4]: Safer reassembly
Another spin of Herbert Xu's "safer ip reassembly" patch for 2.6.16. (The original patch is here: http://marc.theaimsgroup.com/?l=linux-netdev&m=112281936522415&w=2 and my only contribution is to have tested it.) This patch (optionally) does additional checks before accepting IP fragments, which can greatly reduce the possibility of reassembling fragments which originated from different IP datagrams. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Arthur Kepner <akepner@sgi.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/sysctl_net_ipv4.c')
-rw-r--r--net/ipv4/sysctl_net_ipv4.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 01444a02b48b..dbf82955aabe 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -22,6 +22,7 @@
extern int sysctl_ip_nonlocal_bind;
#ifdef CONFIG_SYSCTL
+static int zero;
static int tcp_retr1_max = 255;
static int ip_local_port_range_min[] = { 1, 1 };
static int ip_local_port_range_max[] = { 65535, 65535 };
@@ -614,6 +615,15 @@ ctl_table ipv4_table[] = {
.strategy = &sysctl_jiffies
},
{
+ .ctl_name = NET_IPV4_IPFRAG_MAX_DIST,
+ .procname = "ipfrag_max_dist",
+ .data = &sysctl_ipfrag_max_dist,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .extra1 = &zero
+ },
+ {
.ctl_name = NET_TCP_NO_METRICS_SAVE,
.procname = "tcp_no_metrics_save",
.data = &sysctl_tcp_nometrics_save,
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