net: pim: add a helper to check for IPv4 all pim routers address
authorNikolay Aleksandrov <nikolay@cumulusnetworks.com>
Mon, 31 Oct 2016 12:21:03 +0000 (13:21 +0100)
committerDavid S. Miller <davem@davemloft.net>
Mon, 31 Oct 2016 20:18:30 +0000 (16:18 -0400)
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/linux/pim.h

index 354235a2691b4b66514d4a3ec893cef4caa18578..1b6c0dbba94eef865d87dc19496c1541ebf67408 100644 (file)
@@ -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