Add TCP protocol support with congestion control#1
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This commit introduces TCP transport protocol support to the Machnet networking stack, which previously only supported UDP. The implementation includes: - tcp.h: TCP header structure with standard fields (ports, seq/ack numbers, flags, window, checksum, urgent pointer) following RFC 793 - tcp.cc: TCP header ToString() and FlagsToString() utility methods - tcp_cc.h: TCP congestion control with: - Slow start (exponential cwnd growth) - Congestion avoidance (AIMD) - Fast retransmit (on 3 duplicate ACKs) - Fast recovery (NewReno-style) - RTT estimation using Jacobson/Karels algorithm - RTO calculation per RFC 6298 - SACK support - tcp_flow.h: TCP flow management including: - Full TCP state machine (CLOSED through TIME_WAIT) - Three-way handshake (active and passive open) - Connection teardown with FIN/RST - Data transmission with congestion control - Out-of-order packet handling and reassembly - flow_key.h: Extended to support TCP flow keys alongside existing UDP The implementation follows the existing code style and integrates with the DPDK-based packet processing infrastructure. https://claude.ai/code/session_01FawDCUwRcn1X6wwsfGjfxC
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Summary
This PR adds comprehensive TCP (Transmission Control Protocol) support to the juggler networking library, including TCP header definitions, flow key structures, and a complete TCP congestion control implementation following RFC 5681 standards.
Key Changes
TCP Header Implementation
tcp.hwith complete TCP header structure (RFC 793) including:ToString(),FlagsToString())tcp.ccwith implementations of string conversion methodsTCP Congestion Control
tcp_cc.hwith full TCP congestion control implementation:Flow Key Structures
flow_key.hwith TCP-specific flow definitions:Protocolenum for transport layer identification (UDP/TCP)tcp_flow::Listenerstruct for TCP listener endpointstcp_flow::Keystruct for TCP 5-tuple flow identificationNotable Implementation Details
Testing Considerations
https://claude.ai/code/session_01FawDCUwRcn1X6wwsfGjfxC