tcp.c File Reference

#include "tcp.h"
#include "libk/serial.h"
#include "net/ip_type.h"
#include "net/ipv4.h"
#include "net/netbuff.h"
#include "net/netdev.h"
#include "net/netutils.h"
#include <hal/rand/rand.h>
#include <str.h>

Go to the source code of this file.

Macros
#define	FLAG_FIN   0x01
#define	FLAG_SYN   0x02
#define	FLAG_RST   0x04
#define	FLAG_PSH   0x08
#define	FLAG_ACK   0x10
#define	FLAG_URG   0x20

Functions
void	handle_tcp (netdev_t *dev, struct ipv4_header *ip, uint8_t mac_dst[6])
void	send_command (netdev_t *dev, struct ipv4_header *ip, struct tcp_header *tcp, tcp_options_t *opt, uint8_t flags, uint8_t mac_dst[6])
void	send_tcp_data (netdev_t *dev, struct ipv4_header *ip, struct tcp_header *tcp, uint8_t *data, size_t len, uint8_t mac_dst[6])
void	parse_tcp_options (struct tcp_header *tcp, tcp_options_t *out)
uint8_t	build_synack_options (netdev_t *dev, uint8_t *buf, tcp_options_t *client_opts)

Macro Definition Documentation

FLAG_ACK

#define FLAG_ACK   0x10

Definition at line 15 of file tcp.c.

Referenced by handle_tcp(), and send_tcp_data().

FLAG_FIN

#define FLAG_FIN   0x01

Definition at line 11 of file tcp.c.

Referenced by handle_tcp(), and send_tcp_data().

FLAG_PSH

#define FLAG_PSH   0x08

Definition at line 14 of file tcp.c.

Referenced by handle_tcp(), and send_tcp_data().

FLAG_RST

#define FLAG_RST   0x04

Definition at line 13 of file tcp.c.

FLAG_SYN

#define FLAG_SYN   0x02

Definition at line 12 of file tcp.c.

Referenced by handle_tcp().

FLAG_URG

#define FLAG_URG   0x20

Definition at line 16 of file tcp.c.

Function Documentation

build_synack_options()

uint8_t build_synack_options	(	netdev_t *	dev,
		uint8_t *	buf,
		tcp_options_t *	client_opts )

Definition at line 273 of file tcp.c.

References tcp_options_t::mss, and netdev::mtu.

Referenced by send_command().

handle_tcp()

void handle_tcp	(	netdev_t *	dev,
		struct ipv4_header *	ip,
		uint8_t	mac_dst[6] )

Definition at line 18 of file tcp.c.

References FLAG_ACK, FLAG_FIN, FLAG_PSH, FLAG_SYN, flags, parse_tcp_options(), send_command(), send_tcp_data(), strncmp(), ipv4_header::total_length, ipv4_header::version_ihl, and vxNtohs().

Referenced by socket_receive().

parse_tcp_options()

void parse_tcp_options	(	struct tcp_header *	tcp,
		tcp_options_t *	out )

Definition at line 214 of file tcp.c.

References tcp_options_t::has_timestamp, tcp_options_t::has_wscale, memset(), tcp_options_t::mss, tcp_options_t::sack_permitted, tcp_options_t::ts_ecr, tcp_options_t::ts_val, and tcp_options_t::wscale.

Referenced by handle_tcp().

send_command()

void send_command	(	netdev_t *	dev,
		struct ipv4_header *	ip,
		struct tcp_header *	tcp,
		tcp_options_t *	opt,
		uint8_t	flags,
		uint8_t	mac_dst[6] )

Definition at line 81 of file tcp.c.

References build_synack_options(), checksum16_raw(), create_netbuff(), dst_ip, ipv4_header::dst_ip, flags, free_netbuff(), ipv4_send(), memcopy(), netbuff_push(), protocol, ipv4_header::src_ip, src_ip, TCP_PROTOCOL, vxHtonl(), vxHtons(), vxNtohl(), vxRand(), and __attribute__::zero.

Referenced by handle_tcp().

send_tcp_data()

void send_tcp_data	(	netdev_t *	dev,
		struct ipv4_header *	ip,
		struct tcp_header *	tcp,
		uint8_t *	data,
		size_t	len,
		uint8_t	mac_dst[6] )

Definition at line 139 of file tcp.c.

References checksum16_raw(), create_netbuff(), data, dst_ip, ipv4_header::dst_ip, FLAG_ACK, FLAG_FIN, FLAG_PSH, free_netbuff(), ipv4_send(), len, memcopy(), netbuff_push(), netbuff_put(), protocol, ipv4_header::src_ip, src_ip, TCP_PROTOCOL, ipv4_header::total_length, ipv4_header::version_ihl, vxHtonl(), vxHtons(), vxNtohl(), vxNtohs(), and __attribute__::zero.

Referenced by handle_tcp().