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Fix an incompatibility between CARP and IPv4 multicast routing, whereby

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the VRRPv2 advertisements will originate from the wrong source address.
This only affects kernels compiled with MROUTING and after the MRT_INIT
ioctl() has been issued.
Set imo_multicast_vif in carp's softc to the invalid value -1 after it is
zeroed by softc allocation, to stop the ip_output() path looking up the
incorrect source address thinking a vif is set.

PR:		kern/100532
Submitted by:	Bohus Plucinsky
MFC after:	1 week
This commit is contained in:
Bruce M Simpson 2006-09-25 11:53:54 +00:00
parent b9ad4a7bf0
commit 13c8384424
1 changed files with 1 additions and 0 deletions
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1
sys/netinet/ip_carp.c
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@ -379,6 +379,7 @@ carp_clone_create(struct if_clone *ifc, int unit, caddr_t params)
(sizeof(struct in_multi *) * IP_MIN_MEMBERSHIPS), M_CARP,
M_WAITOK);
sc->sc_imo.imo_max_memberships = IP_MIN_MEMBERSHIPS;
sc->sc_imo.imo_multicast_vif = -1;
callout_init(&sc->sc_ad_tmo, NET_CALLOUT_MPSAFE);
callout_init(&sc->sc_md_tmo, NET_CALLOUT_MPSAFE);