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Red Hat Bugzilla – Attachment 306308 Details for
Bug 231899
multicast incorrect handling
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[patch]
patch to filter out unjoined groups in ipv4
mc.patch (text/plain), 742 bytes, created by
Neil Horman
on 2008-05-21 19:54:26 UTC
(
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Description:
patch to filter out unjoined groups in ipv4
Filename:
MIME Type:
Creator:
Neil Horman
Created:
2008-05-21 19:54:26 UTC
Size:
742 bytes
patch
obsolete
>diff -up linux-2.6.9/net/ipv4/igmp.c.orig linux-2.6.9/net/ipv4/igmp.c >--- linux-2.6.9/net/ipv4/igmp.c.orig 2008-05-21 15:40:41.000000000 -0400 >+++ linux-2.6.9/net/ipv4/igmp.c 2008-05-21 15:51:54.000000000 -0400 >@@ -2063,6 +2063,9 @@ int ip_mc_sf_allow(struct sock *sk, u32 > struct ip_sf_socklist *psl; > int i; > >+ if (loc_addr == INADDR_BROADCAST) >+ return 1; >+ > if (!MULTICAST(loc_addr)) > return 1; > >@@ -2071,8 +2074,14 @@ int ip_mc_sf_allow(struct sock *sk, u32 > pmc->multi.imr_ifindex == dif) > break; > } >- if (!pmc) >- return 1; >+ if (!pmc) { >+ /* >+ * We aren't explicitly added to any mc group >+ * so don't deliver >+ */ >+ return 0; >+ } >+ > psl = pmc->sflist; > if (!psl) > return pmc->sfmode == MCAST_EXCLUDE;
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