Revert "ipv4/icmp: redirect messages can use the ingress daddr as source"
Revert the commit e2ca690b657f ("ipv4/icmp: redirect messages
can use the ingress daddr as source"), which tried to introduce a more
suitable behaviour for ICMP redirect messages generated by VRRP routers.
However RFC 5798 section 8.1.1 states:
The IPv4 source address of an ICMP redirect should be the address
that the end-host used when making its next-hop routing decision.
while said commit used the generating packet destination
address, which do not match the above and in most cases leads to
no redirect packets to be generated.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 9983825..ebe94f2 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -884,8 +884,8 @@
icmp_errors_use_inbound_ifaddr - BOOLEAN
- If zero, icmp error messages except redirects are sent with the primary
- address of the exiting interface.
+ If zero, icmp error messages are sent with the primary address of
+ the exiting interface.
If non-zero, the message will be sent with the primary address of
the interface that received the packet that caused the icmp error.
@@ -897,23 +897,8 @@
then the primary address of the first non-loopback interface that
has one will be used regardless of this setting.
- The source address selection of icmp redirect messages is controlled by
- icmp_errors_use_inbound_ifaddr.
Default: 0
-icmp_redirects_use_orig_daddr - BOOLEAN
-
- If zero, icmp redirect messages are sent using the address specified for
- other icmp errors by icmp_errors_use_inbound_ifaddr.
-
- If non-zero, the message will be sent with the destination address of
- the packet that caused the icmp redirect.
- This behaviour is the preferred one on VRRP routers (see RFC 5798
- section 8.1.1).
-
- Default: 0
-
-
igmp_max_memberships - INTEGER
Change the maximum number of multicast groups we can subscribe to.
Default: 20
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index 46d336a..c68926b 100644
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -74,7 +74,6 @@
int sysctl_icmp_ratelimit;
int sysctl_icmp_ratemask;
int sysctl_icmp_errors_use_inbound_ifaddr;
- int sysctl_icmp_redirects_use_orig_daddr;
struct local_ports ip_local_ports;
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index f3c356b..36e2697 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -659,9 +659,7 @@
*/
saddr = iph->daddr;
- if (!((type == ICMP_REDIRECT) &&
- net->ipv4.sysctl_icmp_redirects_use_orig_daddr) &&
- !(rt->rt_flags & RTCF_LOCAL)) {
+ if (!(rt->rt_flags & RTCF_LOCAL)) {
struct net_device *dev = NULL;
rcu_read_lock();
@@ -1224,11 +1222,6 @@
net->ipv4.sysctl_icmp_ratemask = 0x1818;
net->ipv4.sysctl_icmp_errors_use_inbound_ifaddr = 0;
- /* Control paramerer - use the daddr of originating packets as saddr
- * in redirect messages?
- */
- net->ipv4.sysctl_icmp_redirects_use_orig_daddr = 0;
-
return 0;
fail:
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 30a531c..894da3a 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -818,13 +818,6 @@
.proc_handler = proc_dointvec
},
{
- .procname = "icmp_redirects_use_orig_daddr",
- .data = &init_net.ipv4.sysctl_icmp_redirects_use_orig_daddr,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec
- },
- {
.procname = "icmp_ratelimit",
.data = &init_net.ipv4.sysctl_icmp_ratelimit,
.maxlen = sizeof(int),