pbuf Struct Reference

#include <pbuf.h>

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

u8_t pbuf::flags

misc flags

Referenced by pbuf_alloc(), and pbuf_free().

u16_t pbuf::len

length of this buffer

Referenced by gmac_low_level_input(), gmac_low_level_output(), pbuf_alloc(), pbuf_cat(), pbuf_copy(), pbuf_copy_partial(), pbuf_dechain(), pbuf_get_at(), pbuf_header(), pbuf_memcmp(), pbuf_realloc(), pbuf_take(), and pbuf_take_partial().

struct pbuf* pbuf::next

next pbuf in singly linked pbuf chain

Referenced by gmac_low_level_output(), pbuf_alloc(), pbuf_cat(), pbuf_clen(), pbuf_coalesce(), pbuf_copy(), pbuf_copy_partial(), pbuf_dechain(), pbuf_free(), pbuf_get_at(), pbuf_memcmp(), pbuf_realloc(), pbuf_take(), and pbuf_take_partial().

void* pbuf::payload

pointer to the actual data in the buffer

Referenced by ethernetif_input(), gmac_low_level_output(), gmac_rx_populate_queue(), http_recv(), pbuf_alloc(), pbuf_copy(), pbuf_copy_partial(), pbuf_get_at(), pbuf_header(), pbuf_realloc(), pbuf_take(), and pbuf_take_partial().

u16_t pbuf::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.

Referenced by pbuf_alloc(), pbuf_free(), and pbuf_ref().

u16_t pbuf::tot_len

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)

Referenced by gmac_low_level_input(), gmac_low_level_output(), http_recv(), pbuf_alloc(), pbuf_cat(), pbuf_coalesce(), pbuf_copy(), pbuf_dechain(), pbuf_header(), pbuf_memfind(), pbuf_read16be(), pbuf_read32le(), pbuf_read8(), pbuf_realloc(), pbuf_strstr(), pbuf_take(), pbuf_write16be(), pbuf_write32be(), pbuf_write32le(), and pbuf_write8().

u8_t pbuf::type

pbuf_type as u8_t instead of enum to save space

Referenced by pbuf_alloc(), pbuf_free(), pbuf_header(), and pbuf_realloc().