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in_mcat.c: change multicast not member condition

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If there is no source filter entry => block if that's SSM ("exclude"
mode per RFC 3678 clause 3).  If there is an entry => check its action &
block if the action is "exclude".

It would be nice if the test case in this PR were converted into an ATF
test case, but not blocking on that.

Reviewed by: imp, melifaro
Pull Request: https://github.com/freebsd/freebsd-src/pull/601
This commit is contained in:
Fidaullah Noonari 2023-02-28 09:44:12 -07:00 committed by Oscar Zhao
parent fa6c04dd56
commit c25dc4ce23
1 changed files with 1 additions and 1 deletions
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2
sys/netinet/in_mcast.c
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@ -480,7 +480,7 @@ imo_multi_filter(const struct ip_moptions *imo, const struct ifnet *ifp,
ims = imo_match_source(imf, src);
if ((ims == NULL && mode == MCAST_INCLUDE) ||
(ims != NULL && ims->imsl_st[0] != mode))
(ims != NULL && ims->imsl_st[0] == MCAST_EXCLUDE))
return (MCAST_NOTSMEMBER);
return (MCAST_PASS);