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path: root/net/ipv4/ip_sockglue.c
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Diffstat (limited to 'net/ipv4/ip_sockglue.c')
-rw-r--r--net/ipv4/ip_sockglue.c15
1 files changed, 14 insertions, 1 deletions
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index cafad9baff03..1e64dabbd232 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -23,6 +23,7 @@
#include <linux/icmp.h>
#include <linux/inetdevice.h>
#include <linux/netdevice.h>
+#include <linux/slab.h>
#include <net/sock.h>
#include <net/ip.h>
#include <net/icmp.h>
@@ -451,7 +452,8 @@ static int do_ip_setsockopt(struct sock *sk, int level,
(1<<IP_TTL) | (1<<IP_HDRINCL) |
(1<<IP_MTU_DISCOVER) | (1<<IP_RECVERR) |
(1<<IP_ROUTER_ALERT) | (1<<IP_FREEBIND) |
- (1<<IP_PASSSEC) | (1<<IP_TRANSPARENT))) ||
+ (1<<IP_PASSSEC) | (1<<IP_TRANSPARENT) |
+ (1<<IP_MINTTL))) ||
optname == IP_MULTICAST_TTL ||
optname == IP_MULTICAST_ALL ||
optname == IP_MULTICAST_LOOP ||
@@ -936,6 +938,14 @@ mc_msf_out:
inet->transparent = !!val;
break;
+ case IP_MINTTL:
+ if (optlen < 1)
+ goto e_inval;
+ if (val < 0 || val > 255)
+ goto e_inval;
+ inet->min_ttl = val;
+ break;
+
default:
err = -ENOPROTOOPT;
break;
@@ -1198,6 +1208,9 @@ static int do_ip_getsockopt(struct sock *sk, int level, int optname,
case IP_TRANSPARENT:
val = inet->transparent;
break;
+ case IP_MINTTL:
+ val = inet->min_ttl;
+ break;
default:
release_sock(sk);
return -ENOPROTOOPT;