Internal IPv4 Header Representation. More...

#include <ip.h>

Public Attributes
beuint16_t	hard_Type
	Hardware type (1 for Ethernet)

beuint16_t	prot_Type
	Protocol type (0x0800 for IPv4)

uint8_t	hard_size
	Hardware address length (6 for MAC)

uint8_t	prot_size
	Protocol address length (4 for IPv4)

beuint16_t	op_code
	Operation: 1=Request, 2=Reply.

MACADR	sender_phy
	Sender MAC address.

IPADDR4	sender_Ip
	Sender IP address.

MACADR	target_phy
	Target MAC address.

IPADDR4	target_Ip
	Target IP address.

uint8_t	bVerHdrLen
	Version and header length (same as versionNLength in IpHeaderIPv4)

uint8_t	bTos
	Type of Service / Differentiated Services field (same as diffServNEcn)

beuint16_t	wLength
	Total packet length in bytes including header.

beuint16_t	wpktId
	Packet identification for fragment reassembly.

beuint16_t	wFlags_Frag
	Flags and fragment offset combined.

uint8_t	bTTL
	Time To Live / hop count.

uint8_t	proto
	Protocol number (TCP, UDP, ICMP, etc.)

uint16_t	hCSum
	Header checksum.

IPADDR4	ipSrc
	Source IP address.

IPADDR4	ipDst
	Destination IP address.

uint8_t	DATA []
	Flexible array member - payload data follows header (actual length varies by packet)

beuint16_t	srcPort
	Source port number (0-65535)

beuint16_t	dstPort
	Destination port number (0-65535)

beuint16_t	UdpLen
	Datagram length in bytes including UDP header and data (minimum 8 bytes)

uint16_t	UdpCSum
	UDP checksum (optional in IPv4, mandatory in IPv6)

Detailed Description

Internal IPv4 Header Representation.

Internal UDP Packet Header Structure.

This is the internal structure used throughout the NetBurner IP stack for manipulating IPv4 packets. It provides a slightly different layout than the standard IpHeaderIPv4 structure for implementation convenience.

The DATA[] flexible array member allows direct access to the packet payload that follows the IP header.

Note: This structure is packed to ensure proper alignment with network packet data.; The DATA[] field extends beyond the structure to the actual packet length.

Standard UDP header as defined in RFC 768. This structure represents the 8-byte UDP header that precedes the UDP payload data.

The DATA[] flexible array member allows direct access to the UDP payload that follows the header.

Note: This structure is packed to ensure proper alignment with network packet data.; UDP header is always 8 bytes long (no options like TCP).; The checksum is optional in IPv4 (can be zero) but mandatory in IPv6.

Member Data Documentation

◆ DATA

uint8_t __attribute__::DATA

Flexible array member - payload data follows header (actual length varies by packet)

Flexible array member - UDP payload data follows header (actual length = UdpLen - 8)

◆ hCSum

uint16_t __attribute__::hCSum

Header checksum.

Warning: Do not make a big endian variable - checksumming is treated as native endian

◆ UdpCSum

uint16_t __attribute__::UdpCSum

UDP checksum (optional in IPv4, mandatory in IPv6)

Warning: Do not make big endian - see IPPKT::hCSum for explanation

The documentation for this struct was generated from the following files:

Public Attributes

Detailed Description

Member Data Documentation

◆ DATA

◆ hCSum

◆ UdpCSum