tcp.h

//
// Created by ndraey on 21.4.2024.
//
 
#pragma once
 
#include "common.h"
#include "cards.h"
 
typedef struct {
    uint16_t source;
    uint16_t destination;
    uint32_t seq;
    uint32_t ack_seq;
    uint16_t res1:4;
    uint16_t doff:4;
    uint16_t fin:1;
    uint16_t syn:1;
    uint16_t rst:1;
    uint16_t psh:1;
    uint16_t ack:1;
    uint16_t urg:1;
    uint16_t res2:2;
    uint16_t window;
    uint16_t check;
    uint16_t urg_ptr;
} tcp_packet_t;
 
typedef enum {
    TCP_NONE,
    TCP_CREATED,
    TCP_LISTENING,
    TCP_ESTABLISHED
} tcp_connection_status_t;
 
typedef struct {
    netcard_entry_t* card;
    uint32_t dest_ip_addr;
    uint16_t source_port;
    uint16_t dest_port;
    uint32_t seq;
    uint32_t ack;
    tcp_connection_status_t status;
} tcp_connection_t;
 
void tcp_handle_packet(netcard_entry_t *card, tcp_packet_t *packet);