diff options
Diffstat (limited to 'pkg/tcpip/stack/registration.go')
| -rw-r--r-- | pkg/tcpip/stack/registration.go | 43 |
1 files changed, 41 insertions, 2 deletions
diff --git a/pkg/tcpip/stack/registration.go b/pkg/tcpip/stack/registration.go index cf4d52fe9..ff356ea22 100644 --- a/pkg/tcpip/stack/registration.go +++ b/pkg/tcpip/stack/registration.go @@ -161,7 +161,7 @@ type NetworkEndpoint interface { // WritePacket writes a packet to the given destination address and // protocol. - WritePacket(r *Route, hdr buffer.Prependable, payload buffer.VectorisedView, protocol tcpip.TransportProtocolNumber, ttl uint8, loop PacketLooping) *tcpip.Error + WritePacket(r *Route, gso *GSO, hdr buffer.Prependable, payload buffer.VectorisedView, protocol tcpip.TransportProtocolNumber, ttl uint8, loop PacketLooping) *tcpip.Error // ID returns the network protocol endpoint ID. ID() *NetworkEndpointID @@ -226,6 +226,7 @@ const ( CapabilitySaveRestore CapabilityDisconnectOk CapabilityLoopback + CapabilityGSO ) // LinkEndpoint is the interface implemented by data link layer protocols (e.g., @@ -258,7 +259,7 @@ type LinkEndpoint interface { // To participate in transparent bridging, a LinkEndpoint implementation // should call eth.Encode with header.EthernetFields.SrcAddr set to // r.LocalLinkAddress if it is provided. - WritePacket(r *Route, hdr buffer.Prependable, payload buffer.VectorisedView, protocol tcpip.NetworkProtocolNumber) *tcpip.Error + WritePacket(r *Route, gso *GSO, hdr buffer.Prependable, payload buffer.VectorisedView, protocol tcpip.NetworkProtocolNumber) *tcpip.Error // Attach attaches the data link layer endpoint to the network-layer // dispatcher of the stack. @@ -381,3 +382,41 @@ func FindLinkEndpoint(id tcpip.LinkEndpointID) LinkEndpoint { return linkEndpoints[id] } + +// GSOType is the type of GSO segments. +// +// +stateify savable +type GSOType int + +// Types of gso segments. +const ( + GSONone GSOType = iota + GSOTCPv4 + GSOTCPv6 +) + +// GSO contains generic segmentation offload properties. +// +// +stateify savable +type GSO struct { + // Type is one of GSONone, GSOTCPv4, etc. + Type GSOType + // NeedsCsum is set if the checksum offload is enabled. + NeedsCsum bool + // CsumOffset is offset after that to place checksum. + CsumOffset uint16 + + // Mss is maximum segment size. + MSS uint16 + // L3Len is L3 (IP) header length. + L3HdrLen uint16 + + // MaxSize is maximum GSO packet size. + MaxSize uint32 +} + +// GSOEndpoint provides access to GSO properties. +type GSOEndpoint interface { + // GSOMaxSize returns the maximum GSO packet size. + GSOMaxSize() uint32 +} |