netstack

package
v0.8.3 Latest Latest
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 Go to latest Published: Feb 15, 2026 License: GPL-3.0 Imports: 24 Imported by: 0

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Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func HandlePacket 

func HandlePacket(nstack *stack.Stack, localConn TunConn, yamuxConn *yamux.Session)

func ProcessICMP 

func ProcessICMP(nstack *stack.Stack, pkt stack.PacketBufferPtr)

ProcessICMP send back a ICMP echo reply from after receiving a echo request. This code come mostly from pkg/tcpip/network/ipv4/icmp.go

Types

type ConnPool 

type ConnPool struct {
	CloseChan chan interface{}
	Pool      chan TunConn
	sync.Mutex
}

func NewConnPool 

func NewConnPool(size int) ConnPool

func (*ConnPool) Add 

func (p *ConnPool) Add(packet TunConn) error

func (*ConnPool) Close 

func (p *ConnPool) Close() error

func (*ConnPool) Closed 

func (p *ConnPool) Closed() bool

func (*ConnPool) Get 

func (p *ConnPool) Get() (TunConn, error)

type ICMPConn 

type ICMPConn struct {
	Request stack.PacketBufferPtr
}

ICMPConn represents a ICMP Packet Buffer

type NetStack 

type NetStack struct {
	sync.Mutex
	// contains filtered or unexported fields
}

NetStack is the structure used to store the connection pool and the gvisor network stack

func NewStack 

func NewStack(settings StackSettings, connPool *ConnPool) (*NetStack, error)

NewStack registers a new GVisor Network Stack

func (*NetStack) Close added in v0.5.1 

func (n *NetStack) Close()

func (*NetStack) GetStack 

func (s *NetStack) GetStack() *stack.Stack

GetStack returns the current Gvisor stack.Stack object

func (*NetStack) Interface added in v0.5.1 

func (n *NetStack) Interface() *tun.TunInterface

func (*NetStack) SetConnPool 

func (s *NetStack) SetConnPool(connPool *ConnPool)

SetConnPool is used to change the current connPool. It must be used after switching Ligolo agents

type StackSettings 

type StackSettings struct {
	TunName     string
	MaxInflight int
}

type TCPConn 

type TCPConn struct {
	EndpointID stack.TransportEndpointID
	Request    *tcp.ForwarderRequest
}

TCPConn represents a TCP Forwarder connection

type TunConn 

type TunConn struct {
	Protocol tcpip.TransportProtocolNumber
	Handler  interface{}
}

func (TunConn) GetICMP 

func (t TunConn) GetICMP() ICMPConn

GetICMP returns the handler as a ICMPConn

func (TunConn) GetTCP 

func (t TunConn) GetTCP() TCPConn

GetTCP returns the handler as a TCPConn

func (TunConn) GetUDP 

func (t TunConn) GetUDP() UDPConn

GetUDP returns the handler as a UDPConn

func (TunConn) IsICMP 

func (t TunConn) IsICMP() bool

IsICMP check if the current TunConn is ICMP

func (TunConn) IsTCP 

func (t TunConn) IsTCP() bool

IsTCP check if the current TunConn is TCP

func (TunConn) IsUDP 

func (t TunConn) IsUDP() bool

IsUDP check if the current TunConn is UDP

func (TunConn) Terminate 

func (t TunConn) Terminate(reset bool)

Terminate is call when connections need to be terminated. For now, this is only useful for TCP connections

type UDPConn 

type UDPConn struct {
	EndpointID stack.TransportEndpointID
	Request    *udp.ForwarderRequest
}

UDPConn represents a UDP Forwarder connection

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