ipv4.h File Reference

#include <arpa/inet.h>
#include <net/net.h>
#include <sys/types.h>

Include dependency graph for ipv4.h:

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Data Structures
struct	ipv4_header_t

Functions
void	ipv4_receive_packet (net_interface_t *interface, uint8_t *data, uint32_t len)
void	ipv4_send_packet (net_interface_t *interface, struct sockaddr_in *dst_addr, uint8_t protocol, uint16_t flags, uint8_t *data, uint32_t len)
uint16_t	ipv4_checksum (void *addr, int count)
	From: https://tools.ietf.org/html/rfc1071.

Detailed Description

See also

https://en.wikipedia.org/wiki/IPv4#Header

https://www.saminiir.com/lets-code-tcp-ip-stack-2-ipv4-icmpv4/

Function Documentation

ipv4_checksum()

uint16_t ipv4_checksum	(	void *	addr,
		int	count )

From: https://tools.ietf.org/html/rfc1071.

Computes an Internet checksum as defined in RFC1071.

See also

https://tools.ietf.org/html/rfc1071

https://tools.ietf.org/html/rfc1141

Parameters

addr	the address of the data to compute a checksum to
count	the number of data bytes to use for the checksum

Returns

a checksum value

ipv4_receive_packet()

void ipv4_receive_packet	(	net_interface_t *	interface,
		uint8_t *	data,
		uint32_t	len )

Handles IPv4 packets.

Parameters

interface	the interface that received the IPv4 packet
data	the data containing the IPv4 packet
len	the length of the data

ipv4_send_packet()

void ipv4_send_packet	(	net_interface_t *	interface,
		struct sockaddr_in *	dst_addr,
		uint8_t	protocol,
		uint16_t	flags,
		uint8_t *	data,
		uint32_t	len )

Sends an IPv4 packet.

Parameters

interface	the interface to use to send the IPv4 request
dst_addr	the destination socket address
protocol	the protocol encapsulated in the IP packet
flags	IP flags
data	the data to send over IP
len	the size of the data to send