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58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
#ifndef _NET_TCP_H
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#define _NET_TCP_H
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#include <net/net.h>
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#define TCP_FLAG_FIN 0x01
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#define TCP_FLAG_SYN 0x02
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#define TCP_FLAG_RST 0x04
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#define TCP_FLAG_PSH 0x08
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#define TCP_FLAG_ACK 0x10
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#define TCP_FLAG_URG 0x20
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#define TCP_STATE_CLOSED 0
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#define TCP_STATE_LISTEN 1
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#define TCP_STATE_SYN_SENT 2
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#define TCP_STATE_SYN_RCVD 3
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#define TCP_STATE_ESTABLISHED 4
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#define TCP_STATE_FIN_WAIT1 5
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#define TCP_STATE_FIN_WAIT2 6
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#define TCP_STATE_CLOSE_WAIT 7
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#define TCP_STATE_CLOSING 8
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#define TCP_STATE_LAST_ACK 9
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#define TCP_STATE_TIME_WAIT 10
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typedef struct {
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uint16_t src_port;
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uint16_t dst_port;
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uint32_t seq_num;
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uint32_t ack_num;
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uint8_t data_offset_reserved;
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uint8_t flags;
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uint16_t window_size;
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uint16_t checksum;
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uint16_t urgent_pointer;
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} __attribute__((packed)) tcp_header_t;
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typedef struct tcp_conn {
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uint32_t local_ip;
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uint32_t remote_ip;
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uint16_t local_port;
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uint16_t remote_port;
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uint8_t state;
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uint32_t seq_num;
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uint32_t ack_num;
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bool in_use;
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} tcp_conn_t;
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void tcp_init(void);
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void tcp_receive(const uint8_t* packet, uint16_t length, uint32_t src_ip);
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void tcp_send_packet(uint32_t dst_ip, uint16_t src_port, uint16_t dst_port,
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uint32_t seq, uint32_t ack, uint8_t flags,
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const void* payload, uint16_t payload_len);
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size_t tcp_get_connections_count(void);
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const tcp_conn_t* tcp_get_connection(size_t index);
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#endif // _NET_TCP_H
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