feat: traceroute (mtr) support for gVisor TUN and WireGuard tunnels#70
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xdqi wants to merge 3 commits into
Open
feat: traceroute (mtr) support for gVisor TUN and WireGuard tunnels#70xdqi wants to merge 3 commits into
xdqi wants to merge 3 commits into
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Add ICMP Time Exceeded and Destination Unreachable error handling to the ICMPForwarder, enabling traceroute (mtr) to work through gVisor-based TUN and WireGuard tunnels. - Add transport error loop for receiving ICMP errors via gVisor dispatch - Add SourceRewriter for NAT-aware ICMP error rewriting - Preserve original TTL/HopLimit when forwarding ICMP packets - Add platform-specific TTL setting via raw socket options - Handle ICMPv6 error forwarding with IPv6 header synthesis - Refactor ping session management and error listener setup
Add UDP and TCP raw socket support for DirectRoute, enabling mtr --udp and mtr --tcp to work through gVisor-based tunnels. - Add UDPDestination with raw socket sending and ICMP error matching - Add TCPDestination with raw SYN socket for TCP traceroute - Add TCP/UDP source rewriting in SourceRewriter - Integrate UDP/TCP DirectRoute handlers in gVisor forwarders - Add TTL guard for UDP DirectRoute packets - Add comprehensive tests for UDP DirectRoute and SourceRewriter
Extract DirectRoute logic from TCPForwarder/UDPForwarder into standalone wrapper functions, enabling any gVisor transport handler to be wrapped with DirectRoute support without code duplication. - Add WrapTCPHandlerWithDirectRoute and WrapUDPHandlerWithDirectRoute - Add MaxTracerouteHopLimit configuration for TUN stack - Add TTL decrement with ICMP Time Exceeded generation for VPN mode - Extract checkTracerouteTTL and setsockoptTTL helpers - TCPForwarder and UDPForwarder are now pure proxy forwarders
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Add traceroute/mtr support through gVisor-based TUN and WireGuard tunnels, enabling ICMP, UDP and TCP traceroute modes.
Features
Dependencies
Changes
DirectRouteOptionsin stack setup