packet Struct Reference

A network packet. More...

#include <packet.h>

Data Fields
size_t	allocated_size
	Size allocated for the packet.
size_t	packet_size
	Size of the contained packet.
size_t	popped
	Number of popped bytes.
struct ethernet_device *	netdev
	The internet device this packet went/is going through.
union {
}	l2
	The packet's link layer header.
union {
}	l3
	The packet's network layer header.
void *	payload
	Start of the packet's content (L4 and beyond)
node_t	rx_this

Detailed Description

The packet structure does not contain the packet directly, it just holds metadata and information about it and its usage. Instead, the packet is located right after it, in a pre-allocated memory buffer, whose size is specified by the caller during the struct's allocation.

The user should NEVER interact with the packet's buffer directly, and should always use the packet_put_data function to add new data to the packet. This way, adding data to the packet can only be done incrementally, layer after layer, which corresponds to the network API's philosophy.

Field Documentation

rx_this

node_t packet::rx_this

Used by socket to list received packets

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

• include/kernel/net/packet.h