diff options
| author | Ghanan Gowripalan <ghanan@google.com> | 2019-10-22 07:25:35 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2019-10-22 07:26:54 -0700 |
| commit | fb69de696be5d5ebfd427867fe387c2f93845bfa (patch) | |
| tree | 179570706465adc4d23cc849b68fb23d0761bc8a /pkg/tcpip/header/ipv6.go | |
| parent | 070a8c2d4ca3547304a0ab7539208cca44b1ba86 (diff) | |
Auto-generate an IPv6 link-local address based on the NIC's MAC Address.
This change adds support for optionally auto-generating an IPv6 link-local
address based on the NIC's MAC Address on NIC enable.
Note, this change will not break existing uses of netstack as the default
configuration for the stack options is set in such a way that a link-local
address will not be auto-generated unless the stack is explicitly configured.
See `stack.Options` for more details. Specifically, see
`stack.Options.AutoGenIPv6LinkLocal`.
Tests: Tests to make sure that the IPb6 link-local address is only
auto-generated if the stack is specifically configured to do so. Also tests to
make sure that an auto-generated address goes through the DAD process.
PiperOrigin-RevId: 276059813
Diffstat (limited to 'pkg/tcpip/header/ipv6.go')
| -rw-r--r-- | pkg/tcpip/header/ipv6.go | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/pkg/tcpip/header/ipv6.go b/pkg/tcpip/header/ipv6.go index b125bbea5..f1e60911b 100644 --- a/pkg/tcpip/header/ipv6.go +++ b/pkg/tcpip/header/ipv6.go @@ -101,6 +101,15 @@ var IPv6EmptySubnet = func() tcpip.Subnet { return subnet }() +// IPv6LinkLocalPrefix is the prefix for IPv6 link-local addresses, as defined +// by RFC 4291 section 2.5.6. +// +// The prefix is fe80::/64 +var IPv6LinkLocalPrefix = tcpip.AddressWithPrefix{ + Address: "\xfe\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", + PrefixLen: 64, +} + // PayloadLength returns the value of the "payload length" field of the ipv6 // header. func (b IPv6) PayloadLength() uint16 { |