ip4_frag.h File Reference

#include "lwip/opt.h"
#include "lwip/err.h"
#include "lwip/pbuf.h"
#include "lwip/netif.h"
#include "lwip/ip_addr.h"
#include "lwip/ip.h"

Data Structures
struct	ip_reassdata
struct	pbuf_custom_ref

Functions
void	ip_reass_tmr (void)
struct pbuf *	ip4_reass (struct pbuf *p)
err_t	ip4_frag (struct pbuf *p, struct netif *netif, const ip4_addr_t *dest)

Detailed Description

IP fragmentation/reassembly

Function Documentation

ip4_frag()

err_t ip4_frag	(	struct pbuf *	p,
		struct netif *	netif,
		const ip4_addr_t *	dest
	)

Fragment an IP datagram if too large for the netif.

Chop the datagram in MTU sized chunks and send them in order by pointing PBUF_REFs into p.

Parameters

p	ip packet to send
netif	the netif on which to send
dest	destination ip address to which to send

Returns

ERR_OK if sent successfully, err_t otherwise

ip4_reass()

struct pbuf* ip4_reass

(

struct pbuf *

p

)

Reassembles incoming IP fragments into an IP datagram.

Parameters

p	points to a pbuf chain of the fragment

Returns

NULL if reassembly is incomplete, ? otherwise

ip_reass_tmr()

void ip_reass_tmr

(

void

)

Reassembly timer base function for both NO_SYS == 0 and 1 (!).

Should be called every 1000 msec (defined by IP_TMR_INTERVAL).