Commit 94c821c7 authored by Seth David Schoen's avatar Seth David Schoen Committed by David S. Miller
Browse files

ip: Treat IPv4 segment's lowest address as unicast 



Treat only the highest, not the lowest, IPv4 address within a local
subnet as a broadcast address.

Signed-off-by: default avatarSeth David Schoen <schoen@loyalty.org>
Suggested-by: default avatarJohn Gilmore <gnu@toad.com>
Acked-by: default avatarDave Taht <dave.taht@gmail.com>
Reviewed-by: default avatarDavid Ahern <dsahern@kernel.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 77091933

net/ipv4/fib_frontend.c

+1 −3
Original line number Diff line number Diff line
@@ -1122,10 +1122,8 @@ void fib_add_ifaddr(struct in_ifaddr *ifa) 
				  prefix, ifa->ifa_prefixlen, prim,

				  ifa->ifa_rt_priority);



		/* Add network specific broadcasts, when it takes a sense */

		/* Add the network broadcast address, when it makes sense */

		if (ifa->ifa_prefixlen < 31) {

			fib_magic(RTM_NEWROUTE, RTN_BROADCAST, prefix, 32,

				  prim, 0);

			fib_magic(RTM_NEWROUTE, RTN_BROADCAST, prefix | ~mask,

				  32, prim, 0);

		}