From 20bb6ce9879e19eee7539329eaa2408d12b00306 Mon Sep 17 00:00:00 2001 From: Nikolay Aleksandrov Date: Mon, 31 Oct 2016 13:21:03 +0100 Subject: [PATCH] net: pim: add a helper to check for IPv4 all pim routers address Signed-off-by: Nikolay Aleksandrov Signed-off-by: David S. Miller --- include/linux/pim.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/linux/pim.h b/include/linux/pim.h index 354235a2691b..1b6c0dbba94e 100644 --- a/include/linux/pim.h +++ b/include/linux/pim.h @@ -57,4 +57,10 @@ static inline u8 pim_hdr_type(const struct pimhdr *pimhdr) { return pimhdr->type & 0xf; } + +/* check if the address is 224.0.0.13, RFC7761 sec 4.3.1 */ +static inline bool pim_ipv4_all_pim_routers(__be32 addr) +{ + return addr == htonl(0xE000000D); +} #endif -- 2.20.1