#include "lwip/opt.h"
#include "lwip/ip6_frag.h"
#include "lwip/ip6.h"
#include "lwip/icmp6.h"
#include "lwip/nd6.h"
#include "lwip/ip.h"
#include "lwip/pbuf.h"
#include "lwip/memp.h"
#include "lwip/stats.h"
#include <string.h>
#include "arch/bpstruct.h"
#include "arch/epstruct.h"

Data Structures
struct	ip6_reass_helper

Macros
#define	IP_REASS_CHECK_OVERLAP 1
#define	IP_REASS_FREE_OLDEST 1

Functions
struct pbuf *	ip6_reass (struct pbuf *p)
err_t	ip6_frag (struct pbuf p, struct netif netif, const ip6_addr_t *dest)

Detailed Description

IPv6 fragmentation and reassembly.

Macro Definition Documentation

◆ IP_REASS_CHECK_OVERLAP

#define IP_REASS_CHECK_OVERLAP 1

Setting this to 0, you can turn off checking the fragments for overlapping regions. The code gets a little smaller. Only use this if you know that overlapping won't occur on your network!

◆ IP_REASS_FREE_OLDEST

#define IP_REASS_FREE_OLDEST 1

Set to 0 to prevent freeing the oldest datagram when the reassembly buffer is full (IP_REASS_MAX_PBUFS pbufs are enqueued). The code gets a little smaller. Datagrams will be freed by timeout only. Especially useful when MEMP_NUM_REASSDATA is set to 1, so one datagram can be reassembled at a time, only.

Function Documentation

◆ ip6_frag()

err_t ip6_frag	(	struct pbuf *	p,
		struct netif *	netif,
		const ip6_addr_t *	dest )

Fragment an IPv6 datagram if too large for the netif or path MTU.

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

Parameters

p	ipv6 packet to send
netif	the netif on which to send
dest	destination ipv6 address to which to send

Returns: ERR_OK if sent successfully, err_t otherwise

◆ ip6_reass()

struct pbuf * ip6_reass ( struct pbuf * p )

Reassembles incoming IPv6 fragments into an IPv6 datagram.