diff options
| author | Kevin Krakauer <krakauer@google.com> | 2020-09-30 16:02:46 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2020-09-30 16:04:26 -0700 |
| commit | 6f8d64f4229be58814319003a397b971ca9b4e1b (patch) | |
| tree | 5ce3e40ad5e76617e288bbd89fa385b8fddcfdd1 /pkg/tcpip/stack/packet_buffer.go | |
| parent | 7f9e13053e84b82c67c12a4964fa4703ebaa571f (diff) | |
ip6tables: redirect support
Adds support for the IPv6-compatible redirect target. Redirection is a limited
form of DNAT, where the destination is always the localhost.
Updates #3549.
PiperOrigin-RevId: 334698344
Diffstat (limited to 'pkg/tcpip/stack/packet_buffer.go')
| -rw-r--r-- | pkg/tcpip/stack/packet_buffer.go | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/pkg/tcpip/stack/packet_buffer.go b/pkg/tcpip/stack/packet_buffer.go index a7d9d59fa..105583c49 100644 --- a/pkg/tcpip/stack/packet_buffer.go +++ b/pkg/tcpip/stack/packet_buffer.go @@ -19,6 +19,7 @@ import ( "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/tcpip" "gvisor.dev/gvisor/pkg/tcpip/buffer" + "gvisor.dev/gvisor/pkg/tcpip/header" ) type headerType int @@ -255,6 +256,20 @@ func (pk *PacketBuffer) Clone() *PacketBuffer { return newPk } +// Network returns the network header as a header.Network. +// +// Network should only be called when NetworkHeader has been set. +func (pk *PacketBuffer) Network() header.Network { + switch netProto := pk.NetworkProtocolNumber; netProto { + case header.IPv4ProtocolNumber: + return header.IPv4(pk.NetworkHeader().View()) + case header.IPv6ProtocolNumber: + return header.IPv6(pk.NetworkHeader().View()) + default: + panic(fmt.Sprintf("unknown network protocol number %d", netProto)) + } +} + // headerInfo stores metadata about a header in a packet. type headerInfo struct { // buf is the memorized slice for both prepended and consumed header. |