lwIP  2.1.0
Lightweight IP stack
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 pbufip4_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
pip packet to send
netifthe netif on which to send
destdestination 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
ppoints 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).