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/** @file
Copyright (c) 2005 - 2015, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef __EFI_IP4_IGMP_H__
#define __EFI_IP4_IGMP_H__
//
// IGMP message type
//
#define IGMP_MEMBERSHIP_QUERY 0x11
#define IGMP_V1_MEMBERSHIP_REPORT 0x12
#define IGMP_V2_MEMBERSHIP_REPORT 0x16
#define IGMP_LEAVE_GROUP 0x17
#define IGMP_V1ROUTER_PRESENT 400
#define IGMP_UNSOLICIATED_REPORT 10
#pragma pack(1)
typedef struct {
UINT8 Type;
UINT8 MaxRespTime;
UINT16 Checksum;
IP4_ADDR Group;
} IGMP_HEAD;
#pragma pack()
///
/// The status of multicast group. It isn't necessary to maintain
/// explicit state of host state diagram. A group with non-zero
/// DelayTime is in "delaying member" state. otherwise, it is in
/// "idle member" state.
///
typedef struct {
LIST_ENTRY Link;
INTN RefCnt;
IP4_ADDR Address;
INTN DelayTime;
BOOLEAN ReportByUs;
EFI_MAC_ADDRESS Mac;
} IGMP_GROUP;
///
/// The IGMP status. Each IP4 service instance has a IGMP_SERVICE_DATA
/// attached. The Igmpv1QuerySeen remember whether the server on this
/// connected network is v1 or v2.
///
typedef struct {
INTN Igmpv1QuerySeen;
LIST_ENTRY Groups;
} IGMP_SERVICE_DATA;
/**
Init the IGMP control data of the IP4 service instance, configure
MNP to receive ALL SYSTEM multicast.
@param[in, out] IpSb The IP4 service whose IGMP is to be initialized.
@retval EFI_SUCCESS IGMP of the IpSb is successfully initialized.
@retval EFI_OUT_OF_RESOURCES Failed to allocate resource to initialize IGMP.
@retval Others Failed to initialize the IGMP of IpSb.
**/
EFI_STATUS
Ip4InitIgmp (
IN OUT IP4_SERVICE *IpSb
);
/**
Join the multicast group on behalf of this IP4 child
@param[in] IpInstance The IP4 child that wants to join the group.
@param[in] Address The group to join.
@retval EFI_SUCCESS Successfully join the multicast group.
@retval EFI_OUT_OF_RESOURCES Failed to allocate resources.
@retval Others Failed to join the multicast group.
**/
EFI_STATUS
Ip4JoinGroup (
IN IP4_PROTOCOL *IpInstance,
IN IP4_ADDR Address
);
/**
Leave the IP4 multicast group on behalf of IpInstance.
@param[in] IpInstance The IP4 child that wants to leave the group
address.
@param[in] Address The group address to leave.
@retval EFI_NOT_FOUND The IP4 service instance isn't in the group.
@retval EFI_SUCCESS Successfully leave the multicast group.
@retval Others Failed to leave the multicast group.
**/
EFI_STATUS
Ip4LeaveGroup (
IN IP4_PROTOCOL *IpInstance,
IN IP4_ADDR Address
);
/**
Handle the received IGMP message for the IP4 service instance.
@param[in] IpSb The IP4 service instance that received the message.
@param[in] Head The IP4 header of the received message.
@param[in] Packet The IGMP message, without IP4 header.
@retval EFI_INVALID_PARAMETER The IGMP message is malformatted.
@retval EFI_SUCCESS The IGMP message is successfully processed.
**/
EFI_STATUS
Ip4IgmpHandle (
IN IP4_SERVICE *IpSb,
IN IP4_HEAD *Head,
IN NET_BUF *Packet
);
/**
The periodical timer function for IGMP. It does the following
things:
1. Decrease the Igmpv1QuerySeen to make it possible to refresh
the IGMP server type.
2. Decrease the report timer for each IGMP group in "delaying
member" state.
@param[in] IpSb The IP4 service instance that is ticking.
**/
VOID
Ip4IgmpTicking (
IN IP4_SERVICE *IpSb
);
/**
Add a group address to the array of group addresses.
The caller should make sure that no duplicated address
existed in the array. Although the function doesn't
assume the byte order of the both Source and Addr, the
network byte order is used by the caller.
@param[in] Source The array of group addresses to add to.
@param[in] Count The number of group addresses in the Source.
@param[in] Addr The IP4 multicast address to add.
@return NULL if failed to allocate memory for the new groups,
otherwise the new combined group addresses.
**/
IP4_ADDR *
Ip4CombineGroups (
IN IP4_ADDR *Source,
IN UINT32 Count,
IN IP4_ADDR Addr
);
/**
Remove a group address from the array of group addresses.
Although the function doesn't assume the byte order of the
both Groups and Addr, the network byte order is used by
the caller.
@param Groups The array of group addresses to remove from.
@param Count The number of group addresses in the Groups.
@param Addr The IP4 multicast address to remove.
@return The number of group addresses in the Groups after remove.
It is Count if the Addr isn't in the Groups.
**/
INTN
Ip4RemoveGroupAddr (
IN OUT IP4_ADDR *Groups,
IN UINT32 Count,
IN IP4_ADDR Addr
);
/**
Find the IGMP_GROUP structure which contains the status of multicast
group Address in this IGMP control block
@param[in] IgmpCtrl The IGMP control block to search from.
@param[in] Address The multicast address to search.
@return NULL if the multicast address isn't in the IGMP control block. Otherwise
the point to the IGMP_GROUP which contains the status of multicast group
for Address.
**/
IGMP_GROUP *
Ip4FindGroup (
IN IGMP_SERVICE_DATA *IgmpCtrl,
IN IP4_ADDR Address
);
#endif
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