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ipv6: resend MLD report if a link-local address completes DAD

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RFC3590/RFC3810 specifies we should resend MLD reports as soon as a
valid link-local address is available.

We now use the valid_ll_addr_cnt to check if it is necessary to resend
a new report.

Changes since Flavio Leitner's version:
a) adapt for valid_ll_addr_cnt
b) resend first reports directly in the path and just arm the timer for
   mc_qrv-1 resends.

Reported-by: 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>
Signed-off-by: Flavio Leitner <fbl@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hannes Frederic Sowa
2013-06-27 00:07:01 +02:00
committed by David S. Miller
parent 1ec047eb47
commit b173ee488d
4 changed files with 67 additions and 5 deletions
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1
include/net/addrconf.h
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@@ -155,6 +155,7 @@ extern bool ipv6_chk_mcast_addr(struct net_device *dev,
const struct in6_addr *group,
const struct in6_addr *src_addr);
extern void ipv6_mc_dad_complete(struct inet6_dev *idev);
/*
* identify MLD packets for MLD filter exceptions
*/

2
include/net/if_inet6.h
View File

@@ -174,10 +174,12 @@ struct inet6_dev {
unsigned char mc_qrv;
unsigned char mc_gq_running;
unsigned char mc_ifc_count;
unsigned char mc_dad_count;
unsigned long mc_v1_seen;
unsigned long mc_maxdelay;
struct timer_list mc_gq_timer; /* general query timer */
struct timer_list mc_ifc_timer; /* interface change timer */
struct timer_list mc_dad_timer; /* dad complete mc timer */
struct ifacaddr6 *ac_list;
rwlock_t lock;