igmp.c File Reference

#include "lwip/opt.h"
#include "lwip/igmp.h"
#include "lwip/debug.h"
#include "lwip/def.h"
#include "lwip/mem.h"
#include "lwip/ip.h"
#include "lwip/inet_chksum.h"
#include "lwip/netif.h"
#include "lwip/stats.h"
#include "lwip/prot/igmp.h"
#include <string.h>

Functions
void	igmp_init (void)
err_t	igmp_start (struct netif *netif)
err_t	igmp_stop (struct netif *netif)
void	igmp_report_groups (struct netif *netif)
struct igmp_group *	igmp_lookfor_group (struct netif *ifp, const ip4_addr_t *addr)
void	igmp_input (struct pbuf *p, struct netif *inp, const ip4_addr_t *dest)
err_t	igmp_joingroup (const ip4_addr_t *ifaddr, const ip4_addr_t *groupaddr)
err_t	igmp_joingroup_netif (struct netif *netif, const ip4_addr_t *groupaddr)
err_t	igmp_leavegroup (const ip4_addr_t *ifaddr, const ip4_addr_t *groupaddr)
err_t	igmp_leavegroup_netif (struct netif *netif, const ip4_addr_t *groupaddr)
void	igmp_tmr (void)

Detailed Description

IGMP - Internet Group Management Protocol

Function Documentation

igmp_init()

void igmp_init

(

void

)

Initialize the IGMP module

igmp_input()

void igmp_input	(	struct pbuf *	p,
		struct netif *	inp,
		const ip4_addr_t *	dest
	)

Called from ip_input() if a new IGMP packet is received.

Parameters

p	received igmp packet, p->payload pointing to the igmp header
inp	network interface on which the packet was received
dest	destination ip address of the igmp packet

igmp_lookfor_group()

struct igmp_group* igmp_lookfor_group	(	struct netif *	ifp,
		const ip4_addr_t *	addr
	)

Search for a group in the netif's igmp group list

Parameters

ifp	the network interface for which to look
addr	the group ip address to search for

Returns

a struct igmp_group* if the group has been found, NULL if the group wasn't found.

igmp_report_groups()

void igmp_report_groups

(

struct netif *

netif

)

Report IGMP memberships for this interface

Parameters

netif

network interface on which report IGMP memberships

igmp_start()

err_t igmp_start

(

struct netif *

netif

)

Start IGMP processing on interface

Parameters

netif

network interface on which start IGMP processing

igmp_stop()

err_t igmp_stop

(

struct netif *

netif

)

Stop IGMP processing on interface

Parameters

netif

network interface on which stop IGMP processing

igmp_tmr()

void igmp_tmr

(

void

)

The igmp timer function (both for NO_SYS=1 and =0) Should be called every IGMP_TMR_INTERVAL milliseconds (100 ms is default).