Max/mixtcp #6321
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Max/mixtcp #6321
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Introduces a TCP-socket-like abstraction for mixnet communication: - MixSocket: unconnected socket that can be connected or used as listener - MixStream: bidirectional stream with send/recv methods - MixStreamReader/MixStreamWriter: split halves for concurrent I/O - NetworkEnvironment: helper for loading environment configs Uses SURBs for anonymous replies when operating in listener mode.
Adds methods to query exit-capable gateways from the nym-api: - get_all_basic_exit_assigned_nodes_with_metadata: paginated fetch - get_basic_exit_assigned_nodes_v2: single page query Used by IpMixStream for automatic gateway selection.
IpMixStream wraps MixStream to tunnel IP packets through Exit Gateway IPRs (IP Packet Routers), enabling use of the mixnet as a proxy for regular internet traffic. The ip_packet_client module contains IPR connection and protocol logic forked from nym-ip-packet-client and adapted for SDK use: - IprClientConnect: handles IPR connection establishment - IprListener: processes incoming IP packet responses - Helper functions for IP packet construction/parsing (ICMP, etc.) - Error types for IPR operations
Updates lib.rs doc comments and README.md to describe new modules: - stream_wrapper: socket-like abstraction (MixStream, IpMixStream) - Marks tcp_proxy as deprecated in favor of stream_wrapper
Introduces mixtcp, a smoltcp-based device that tunnels TCP/IP through the mixnet via IpMixStream and Exit Gateway IPRs. Components: - NymIprDevice: smoltcp::phy::Device impl using channel-based I/O - NymIprBridge: async task bridging the device to IpMixStream - create_device(): helper to set up the complete stack Examples: - cloudflare_ping: ICMP ping through the mixnet - https_client: HTTPS requests through the mixnet - tls: TLS connections through the mixnet
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Part 3 of breaking #6129 into smaller chunks.
This is the third and most rough / proof of concept work. If it is to be merged instead of left as a historical draft, should only be looked at after #6320 is merged and this branch is rebased removing most of the commits).
This contains the
mixtcpproof of conceptThis change is