Main packet buffer struct. More...

#include <pbuf.h>

Data Fields
struct pbuf *	next
	next pbuf in singly linked pbuf chain
void *	payload
	pointer to the actual data in the buffer
u16_t	tot_len
	total length of this buffer and all next buffers in chain belonging to the same packet.
u16_t	len
	length of this buffer
u8_t	type
	pbuf_type as u8_t instead of enum to save space
u8_t	flags
	misc flags
u16_t	ref
	the reference count always equals the number of pointers that refer to this pbuf.

Detailed Description

Main packet buffer struct.

Definition at line 142 of file pbuf.h.

Field Documentation

misc flags

Definition at line 165 of file pbuf.h.

u16_t len

length of this buffer

Definition at line 159 of file pbuf.h.

struct pbuf* next

next pbuf in singly linked pbuf chain

Definition at line 144 of file pbuf.h.

pointer to the actual data in the buffer

Definition at line 147 of file pbuf.h.

u16_t ref

the reference count always equals the number of pointers that refer to this pbuf.

This can be pointers from an application, the stack itself, or pbuf->next pointers from a chain.

Definition at line 172 of file pbuf.h.

total length of this buffer and all next buffers in chain belonging to the same packet.

For non-queue packet chains this is the invariant: p->tot_len == p->len + (p->next? p->next->tot_len: 0)

Definition at line 156 of file pbuf.h.

u8_t type

pbuf_type as u8_t instead of enum to save space

Definition at line 162 of file pbuf.h.