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authorJ. Simonetti <jeroen@simonetti.nl>2005-06-13 15:19:03 -0700
committerDavid S. Miller <davem@davemloft.net>2005-06-13 15:19:03 -0700
commit1c2fb7f93cb20621772bf304f3dba0849942e5db (patch)
tree0cb992ad463ee13af28d80d6730dcf1c4532b707 /net/ipv4/sysctl_net_ipv4.c
parent6a6ddb2a9c11fcc3e8d7517841d28c9ea206ddef (diff)
[IPV4]: Sysctl configurable icmp error source address.
This patch alows you to change the source address of icmp error messages. It applies cleanly to 2.6.11.11 and retains the default behaviour. In the old (default) behaviour icmp error messages are sent with the ip of the exiting interface. The new behaviour (when the sysctl variable is toggled on), it will send the message with the ip of the interface that received the packet that caused the icmp error. This is the behaviour network administrators will expect from a router. It makes debugging complicated network layouts much easier. Also, all 'vendor routers' I know of have the later behaviour. 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.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 3aafb298c1c..23068bddbf0 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -23,6 +23,7 @@ extern int sysctl_ip_nonlocal_bind;
extern int sysctl_icmp_echo_ignore_all;
extern int sysctl_icmp_echo_ignore_broadcasts;
extern int sysctl_icmp_ignore_bogus_error_responses;
+extern int sysctl_icmp_errors_use_inbound_ifaddr;
/* From ip_fragment.c */
extern int sysctl_ipfrag_low_thresh;
@@ -396,6 +397,14 @@ ctl_table ipv4_table[] = {
.proc_handler = &proc_dointvec
},
{
+ .ctl_name = NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR,
+ .procname = "icmp_errors_use_inbound_ifaddr",
+ .data = &sysctl_icmp_errors_use_inbound_ifaddr,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
.ctl_name = NET_IPV4_ROUTE,
.procname = "route",
.maxlen = 0,