[RESEND PATCH net-next 1/2] ip: Treat IPv4 segment's lowest address as unicast
From: Seth David Schoen <hidden>
Date: 2021-05-13 04:37:58
Subsystem:
networking [general], networking [ipv4/ipv6], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Ahern, Ido Schimmel, Linus Torvalds
Treat only the highest, not the lowest, IPv4 address within a local subnet as a broadcast address. Signed-off-by: Seth David Schoen <redacted> Suggested-by: John Gilmore <redacted> Acked-by: Dave Taht <redacted> --- net/ipv4/fib_frontend.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 84bb707bd88d..bfb345c88271 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c@@ -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); }
--
2.25.1