2.2.1.2.175 IGMP_MIB_IF_GROUPS_LIST

The IGMP_MIB_IF_GROUPS_LIST structure is an MIB entry that stores the list of multicast groups that are members of that interface. This structure has variable length. The structure is followed by NumGroups number of IGMP_MIB_GROUP_INFO (section 2.2.1.2.176) structures. 

 typedef struct _IGMP_MIB_IF_GROUPS_LIST {
   DWORD IfIndex;
   DWORD IpAddr;
   DWORD IfType;
   DWORD NumGroups;
   BYTE Buffer[1];
 } IGMP_MIB_IF_GROUPS_LIST,
  *PIGMP_MIB_IF_GROUPS_LIST;

IfIndex: Index of the interface

IpAddr: IP address of the interface

IfType: Type of the interface, MUST be one of the following values.

Value	Meaning
IGMP_IF_NOT_RAS 0x00000001	The interface is connected to a LAN
IGMP_IF_RAS_ROUTER 0x00000002	The interface is connected to another router over RAS
IGMP_IF_RAS_SERVER 0x00000003	The entry corresponds to a RAS server if it contains stats, then it represents summarized stats
IGMP_IF_RAS_CLIENT 0x00000004	The entry corresponds to a RAS client
IGMP_IF_PROXY 0x00000008	then one of the 1st 4 flags still will be set to enable switch from proxy to IGMP router

NumGroups: Number of IGMP_MIB_GROUP_INFO structures

Buffer: MUST point to IGMP_MIB_GROUP_INFO.