From: Yan Zheng Date: Fri, 28 Oct 2005 00:02:08 +0000 (+0800) Subject: [MCAST]: ip[6]_mc_add_src should be called when number of sources is zero X-Git-Tag: v2.6.15-rc1~452^2~26^2~6 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8713dbf05754aa777f31bf491cb60a111f7ad828;p=linux-2.6 [MCAST]: ip[6]_mc_add_src should be called when number of sources is zero And filter mode is exclude. Further explanation by David Stevens: Multicast source filters aren't widely used yet, and that's really the only feature that's affected if an application actually exercises this bug, as far as I can tell. An ordinary filter-less multicast join should still work, and only forwarded multicast traffic making use of filters and doing empty-source filters with the MSFILTER ioctl would be at risk of not getting multicast traffic forwarded to them because the reports generated would not be based on the correct counts. Signed-off-by: Yan Zheng Signed-off-by: Arnaldo Carvalho de Melo --- diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c index 8b6d3939e1..c6247fc840 100644 --- a/net/ipv4/igmp.c +++ b/net/ipv4/igmp.c @@ -1908,8 +1908,11 @@ int ip_mc_msfilter(struct sock *sk, struct ip_msfilter *msf, int ifindex) sock_kfree_s(sk, newpsl, IP_SFLSIZE(newpsl->sl_max)); goto done; } - } else + } else { newpsl = NULL; + (void) ip_mc_add_src(in_dev, &msf->imsf_multiaddr, + msf->imsf_fmode, 0, NULL, 0); + } psl = pmc->sflist; if (psl) { (void) ip_mc_del_src(in_dev, &msf->imsf_multiaddr, pmc->sfmode, diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c index 966b2372aa..f15e04ad02 100644 --- a/net/ipv6/mcast.c +++ b/net/ipv6/mcast.c @@ -545,8 +545,10 @@ int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf) sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max)); goto done; } - } else + } else { newpsl = NULL; + (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0); + } psl = pmc->sflist; if (psl) { (void) ip6_mc_del_src(idev, group, pmc->sfmode,