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authorDavid L Stevens <dlstevens@us.ibm.com>2005-12-27 14:03:00 -0800
committerDavid S. Miller <davem@davemloft.net>2005-12-27 14:03:00 -0800
commit5ab4a6c81eb3dbe32361791d1535f9153f79b0ed (patch)
treec89504389bf1a3452a499db9ea19acea76941616 /include
parent1b93ae64cabe5e28dd5a1f35f96f938ca4f6ae20 (diff)
[IPV6] mcast: Fix multiple issues in MLDv2 reports.
The below "jumbo" patch fixes the following problems in MLDv2. 1) Add necessary "ntohs" to recent "pskb_may_pull" check [breaks all nonzero source queries on little-endian (!)] 2) Add locking to source filter list [resend of prior patch] 3) fix "mld_marksources()" to a) send nothing when all queried sources are excluded b) send full exclude report when source queried sources are not excluded c) don't schedule a timer when there's nothing to report NOTE: RFC 3810 specifies the source list should be saved and each source reported individually as an IS_IN. This is an obvious DOS path, requiring the host to store and then multicast as many sources as are queried (e.g., millions...). This alternative sends a full, relevant report that's limited to number of sources present on the machine. 4) fix "add_grec()" to send empty-source records when it should The original check doesn't account for a non-empty source list with all sources inactive; the new code keeps that short-circuit case, and also generates the group header with an empty list if needed. 5) fix mca_crcount decrement to be after add_grec(), which needs its original value These issues (other than item #1 ;-) ) were all found by Yan Zheng, much thanks! Signed-off-by: David L Stevens <dlstevens@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/if_inet6.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/if_inet6.h b/include/net/if_inet6.h
index d8234f9bd4c4..eb8afe3499a9 100644
--- a/include/net/if_inet6.h
+++ b/include/net/if_inet6.h
@@ -83,6 +83,7 @@ struct ipv6_mc_socklist
struct in6_addr addr;
int ifindex;
struct ipv6_mc_socklist *next;
+ rwlock_t sflock;
unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */
struct ip6_sf_socklist *sflist;
};