diff options
| -rw-r--r-- | sys/netinet/in.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/sys/netinet/in.c b/sys/netinet/in.c index 3f9d369..c5d148a 100644 --- a/sys/netinet/in.c +++ b/sys/netinet/in.c @@ -67,6 +67,10 @@ static int in_ifinit(struct ifnet *, static int subnetsarelocal = 0; SYSCTL_INT(_net_inet_ip, OID_AUTO, subnets_are_local, CTLFLAG_RW, &subnetsarelocal, 0, "Treat all subnets as directly connected"); +static int sameprefixcarponly = 0; +SYSCTL_INT(_net_inet_ip, OID_AUTO, same_prefix_carp_only, CTLFLAG_RW, + &sameprefixcarponly, 0, + "Refuse to create same prefixes on different interfaces"); /* * The IPv4 multicast list (in_multihead and associated structures) are @@ -824,8 +828,14 @@ in_addprefix(target, flags) * If we got a matching prefix route inserted by other * interface address, we are done here. */ - if (ia->ia_flags & IFA_ROUTE) - return 0; + if (ia->ia_flags & IFA_ROUTE) { + if (sameprefixcarponly && + target->ia_ifp->if_type != IFT_CARP && + ia->ia_ifp->if_type != IFT_CARP) + return (EEXIST); + else + return (0); + } } /* |
