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net: add limits to ip_default_ttl

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ip_default_ttl should be between 1 and 255

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2010-12-13 12:16:14 -08:00 • committed by David S. Miller
parent 8c4877a412
commit 249fab773d
1 changed files with 5 additions and 2 deletions
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7
net/ipv4/sysctl_net_ipv4.c
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@ -28,6 +28,8 @@ static int ip_local_port_range_min[] = { 1, 1 };
static int ip_local_port_range_max[] = { 65535, 65535 };
static int tcp_adv_win_scale_min = -31;
static int tcp_adv_win_scale_max = 31;
static int ip_ttl_min = 1;
static int ip_ttl_max = 255;
/* Update system visible IP port range */
static void set_local_port_range(int range[2])
@ -155,8 +157,9 @@ static struct ctl_table ipv4_table[] = {
.data = &sysctl_ip_default_ttl,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
.extra2 = &init_net,
.proc_handler = proc_dointvec_minmax,
.extra1 = &ip_ttl_min,
.extra2 = &ip_ttl_max,
},
{
.procname = "ip_no_pmtu_disc",