diff options
Diffstat (limited to 'pkg/tcpip/header/ipv6.go')
| -rw-r--r-- | pkg/tcpip/header/ipv6.go | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/pkg/tcpip/header/ipv6.go b/pkg/tcpip/header/ipv6.go index 093850e25..9d3abc0e4 100644 --- a/pkg/tcpip/header/ipv6.go +++ b/pkg/tcpip/header/ipv6.go @@ -76,6 +76,13 @@ const ( // IPv6Version is the version of the ipv6 protocol. IPv6Version = 6 + // IPv6AllNodesMulticastAddress is a link-local multicast group that + // all IPv6 nodes MUST join, as per RFC 4291, section 2.8. Packets + // destined to this address will reach all nodes on a link. + // + // The address is ff02::1. + IPv6AllNodesMulticastAddress tcpip.Address = "\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01" + // IPv6MinimumMTU is the minimum MTU required by IPv6, per RFC 2460, // section 5. IPv6MinimumMTU = 1280 @@ -221,6 +228,24 @@ func IsV6MulticastAddress(addr tcpip.Address) bool { return addr[0] == 0xff } +// IsV6UnicastAddress determines if the provided address is a valid IPv6 +// unicast (and specified) address. That is, IsV6UnicastAddress returns +// true if addr contains IPv6AddressSize bytes, is not the unspecified +// address and is not a multicast address. +func IsV6UnicastAddress(addr tcpip.Address) bool { + if len(addr) != IPv6AddressSize { + return false + } + + // Must not be unspecified + if addr == IPv6Any { + return false + } + + // Return if not a multicast. + return addr[0] != 0xff +} + // SolicitedNodeAddr computes the solicited-node multicast address. This is // used for NDP. Described in RFC 4291. The argument must be a full-length IPv6 // address. |