net: add limits to ip_default_ttl

[pandora-kernel.git] / net / ipv4 / sysctl_net_ipv4.c

diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index d96c1da..1a45665 100644 (file)
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -26,6 +26,10 @@ 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 };
+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])
@@ -153,8 +157,9 @@ static struct ctl_table ipv4_table[] = {
                .data           = &sysctl_ip_default_ttl,
                .maxlen         = sizeof(int),
                .mode           = 0644,
-               .proc_handler   = ipv4_doint_and_flush,
-               .extra2         = &init_net,
+               .proc_handler   = proc_dointvec_minmax,
+               .extra1         = &ip_ttl_min,
+               .extra2         = &ip_ttl_max,
        },
        {
                .procname       = "ip_no_pmtu_disc",
@@ -398,7 +403,7 @@ static struct ctl_table ipv4_table[] = {
                .data           = &sysctl_tcp_mem,
                .maxlen         = sizeof(sysctl_tcp_mem),
                .mode           = 0644,
-               .proc_handler   = proc_dointvec
+               .proc_handler   = proc_doulongvec_minmax
        },
        {
                .procname       = "tcp_wmem",
@@ -426,7 +431,9 @@ static struct ctl_table ipv4_table[] = {
                .data           = &sysctl_tcp_adv_win_scale,
                .maxlen         = sizeof(int),
                .mode           = 0644,
-               .proc_handler   = proc_dointvec
+               .proc_handler   = proc_dointvec_minmax,
+               .extra1         = &tcp_adv_win_scale_min,
+               .extra2         = &tcp_adv_win_scale_max,
        },
        {
                .procname       = "tcp_tw_reuse",
@@ -602,8 +609,7 @@ static struct ctl_table ipv4_table[] = {
                .data           = &sysctl_udp_mem,
                .maxlen         = sizeof(sysctl_udp_mem),
                .mode           = 0644,
-               .proc_handler   = proc_dointvec_minmax,
-               .extra1         = &zero
+               .proc_handler   = proc_doulongvec_minmax,
        },
        {
                .procname       = "udp_rmem_min",