diff options
| author | Sean Edmond <[email protected]> | 2025-03-24 13:48:45 -0700 |
|---|---|---|
| committer | Jerome Forissier <[email protected]> | 2025-04-23 09:58:07 +0200 |
| commit | 9a6964e419c0a533e1ca5d224221e440093a9e5f (patch) | |
| tree | ba7daf2759a712cc7d247638f05cfd2340593f9f /include/net6.h | |
| parent | 4446bc331c65d3efb8a9321d6368c61edb56479b (diff) | |
net: dhcp6: Send DHCPv6 using multicast MAC
In IPv6, the broadcast MAC address is not used. Instead, it should use
the multicast address (see RFC RFC2464).
Add IPV6_ALL_NODE_ETH_ADDR macro for clarity.
Signed-off-by: Sean Edmond <[email protected]>
Reviewed-by: Jerome Forissier <[email protected]>
Diffstat (limited to 'include/net6.h')
| -rw-r--r-- | include/net6.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/net6.h b/include/net6.h index 1ed989e584a..2ceeaba0639 100644 --- a/include/net6.h +++ b/include/net6.h @@ -90,6 +90,16 @@ struct udp_hdr { 0x00, 0x00, 0x00, 0x00, \ 0x00, 0x00, 0x00, 0x00, \ 0x00, 0x00, 0x00, 0x02 } } } +/* + * With IPv6, the broadcast MAC address is not used. Instead, it should use + * the multicast address (see RFC RFC2464 section 7) + */ +#define IPV6_ALL_NODE_ETH_ADDR(_ip6_addr) {0x33, \ + 0x33, \ + _ip6_addr.in6_u.u6_addr8[12], \ + _ip6_addr.in6_u.u6_addr8[13], \ + _ip6_addr.in6_u.u6_addr8[14], \ + _ip6_addr.in6_u.u6_addr8[15]} #define IPV6_LINK_LOCAL_PREFIX 0xfe80 #define IPV6_LINK_LOCAL_MASK 0xffb0 /* The first 10-bit of address mask. */ |