net: pim: add a helper to check for IPv4 all pim routers address

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
mariux64 · Oct 31, 2016 · 20bb6ce · 20bb6ce
1 parent 556d299
commit 20bb6ce
Showing 1 changed file with 6 additions and 0 deletions.
diff --git 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