Module tcp 

TCP (Transmission Control Protocol) layer module.

This module implements the TCP protocol (RFC 793), providing packet parsing (via TcpLayer), construction (via TcpBuilder), options handling, and checksum verification.

Features

• Zero-copy parsing with lazy field access
• Complete TCP options support (MSS, Window Scale, SACK, Timestamps, etc.)
• TCP-AO (Authentication Option) support per RFC 5925
• Checksum calculation with IPv4/IPv6 pseudo-header
• Service name resolution for well-known ports
• Builder pattern for packet construction

Example

use stackforge_core::layer::tcp::{TcpBuilder, TcpFlags};

// Build a SYN packet
let packet = TcpBuilder::new()
    .src_port(12345)
    .dst_port(80)
    .seq(1000)
    .syn()
    .window(65535)
    .mss(1460)
    .build();

Re-exports

pub use builder::TcpBuilder;

pub use checksum::tcp_checksum;

pub use checksum::tcp_checksum_ipv4;

pub use checksum::verify_tcp_checksum;

pub use flags::TcpFlags;

pub use header::FIELDS as TCP_FIELDS;

pub use header::TCP_MAX_HEADER_LEN;

pub use header::TCP_MIN_HEADER_LEN;

pub use header::TcpLayer;

pub use header::offsets as tcp_offsets;

pub use options::TcpAoValue;

pub use options::TcpOption;

pub use options::TcpOptionKind;

pub use options::TcpOptions;

pub use options::TcpOptionsBuilder;

pub use options::TcpSackBlock;

pub use options::TcpTimestamp;

pub use services::TCP_SERVICES;

pub use services::service_name;

pub use services::service_port;

Modules

builder

TCP packet builder.

checksum

TCP checksum calculation.

flags

TCP flags implementation.

header

TCP header layer implementation.

options

TCP options parsing and building.

services

TCP services (port to name mapping).