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ipv6: split duplicate address detection and router solicitation timer

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This patch splits the timers for duplicate address detection and router
solicitations apart. The router solicitations timer goes into inet6_dev
and the dad timer stays in inet6_ifaddr.

The reason behind this patch is to reduce the number of unneeded router
solicitations send out by the host if additional link-local addresses
are created. Currently we send out RS for every link-local address on
an interface.

If the RS timer fires we pick a source address with ipv6_get_lladdr. This
change could hurt people adding additional link-local addresses and
specifying these addresses in the radvd clients section because we
no longer guarantee that we use every ll address as source address in
router solicitations.

Cc: Flavio Leitner <fleitner@redhat.com>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: David Stevens <dlstevens@us.ibm.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Reviewed-by: Flavio Leitner <fbl@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hannes Frederic Sowa
2013-06-23 18:39:01 +02:00
committed by David S. Miller
parent 51151a16a6
commit b7b1bfce0b
2 changed files with 98 additions and 76 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/net/if_inet6.h
+6 -2
View File
@@ -50,7 +50,7 @@ struct inet6_ifaddr {
int state;
__u8 probes;
__u8 dad_probes;
__u8 flags;
__u16 scope;
@@ -58,7 +58,7 @@ struct inet6_ifaddr {
unsigned long cstamp; /* created timestamp */
unsigned long tstamp; /* updated timestamp */
struct timer_list timer;
struct timer_list dad_timer;
struct inet6_dev *idev;
struct rt6_info *rt;
@@ -195,6 +195,10 @@ struct inet6_dev {
struct neigh_parms *nd_parms;
struct ipv6_devconf cnf;
struct ipv6_devstat stats;
struct timer_list rs_timer;
__u8 rs_probes;
unsigned long tstamp; /* ipv6InterfaceTable update timestamp */
struct rcu_head rcu;
};