mirror of https://github.com/acidanthera/audk.git
619 lines
16 KiB
C
619 lines
16 KiB
C
/** @file
|
|
This file implements the RFC2236: IGMP v2.
|
|
|
|
Copyright (c) 2005 - 2006, Intel Corporation.<BR>
|
|
All rights reserved. This program and the accompanying materials
|
|
are licensed and made available under the terms and conditions of the BSD License
|
|
which accompanies this distribution. The full text of the license may be found at
|
|
http://opensource.org/licenses/bsd-license.php
|
|
|
|
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
|
|
|
**/
|
|
|
|
#include "Ip4Impl.h"
|
|
|
|
//
|
|
// Route Alert option in IGMP report to direct routers to
|
|
// examine the packet more closely.
|
|
//
|
|
UINT32 mRouteAlertOption = 0x00000494;
|
|
|
|
|
|
/**
|
|
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
|
|
)
|
|
{
|
|
IGMP_SERVICE_DATA *IgmpCtrl;
|
|
EFI_MANAGED_NETWORK_PROTOCOL *Mnp;
|
|
IGMP_GROUP *Group;
|
|
EFI_STATUS Status;
|
|
|
|
IgmpCtrl = &IpSb->IgmpCtrl;
|
|
|
|
//
|
|
// Configure MNP to receive ALL_SYSTEM multicast
|
|
//
|
|
Group = AllocatePool (sizeof (IGMP_GROUP));
|
|
|
|
if (Group == NULL) {
|
|
return EFI_OUT_OF_RESOURCES;
|
|
}
|
|
|
|
Mnp = IpSb->Mnp;
|
|
|
|
Group->Address = IP4_ALLSYSTEM_ADDRESS;
|
|
Group->RefCnt = 1;
|
|
Group->DelayTime = 0;
|
|
Group->ReportByUs = FALSE;
|
|
|
|
Status = Ip4GetMulticastMac (Mnp, IP4_ALLSYSTEM_ADDRESS, &Group->Mac);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
goto ON_ERROR;
|
|
}
|
|
|
|
Status = Mnp->Groups (Mnp, TRUE, &Group->Mac);
|
|
|
|
if (EFI_ERROR (Status) && (Status != EFI_ALREADY_STARTED)) {
|
|
goto ON_ERROR;
|
|
}
|
|
|
|
InsertHeadList (&IgmpCtrl->Groups, &Group->Link);
|
|
return EFI_SUCCESS;
|
|
|
|
ON_ERROR:
|
|
gBS->FreePool (Group);
|
|
return Status;
|
|
}
|
|
|
|
|
|
/**
|
|
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
|
|
)
|
|
{
|
|
LIST_ENTRY *Entry;
|
|
IGMP_GROUP *Group;
|
|
|
|
NET_LIST_FOR_EACH (Entry, &IgmpCtrl->Groups) {
|
|
Group = NET_LIST_USER_STRUCT (Entry, IGMP_GROUP, Link);
|
|
|
|
if (Group->Address == Address) {
|
|
return Group;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/**
|
|
Count the number of IP4 multicast groups that are mapped to the
|
|
same MAC address. Several IP4 multicast address may be mapped to
|
|
the same MAC address.
|
|
|
|
@param[in] IgmpCtrl The IGMP control block to search in
|
|
@param[in] Mac The MAC address to search
|
|
|
|
@return The number of the IP4 multicast group that mapped to the same
|
|
multicast group Mac.
|
|
|
|
**/
|
|
INTN
|
|
Ip4FindMac (
|
|
IN IGMP_SERVICE_DATA *IgmpCtrl,
|
|
IN EFI_MAC_ADDRESS *Mac
|
|
)
|
|
{
|
|
LIST_ENTRY *Entry;
|
|
IGMP_GROUP *Group;
|
|
INTN Count;
|
|
|
|
Count = 0;
|
|
|
|
NET_LIST_FOR_EACH (Entry, &IgmpCtrl->Groups) {
|
|
Group = NET_LIST_USER_STRUCT (Entry, IGMP_GROUP, Link);
|
|
|
|
if (NET_MAC_EQUAL (&Group->Mac, Mac, sizeof (EFI_MAC_ADDRESS))) {
|
|
Count++;
|
|
}
|
|
}
|
|
|
|
return Count;
|
|
}
|
|
|
|
|
|
/**
|
|
Send an IGMP protocol message to the Dst, such as IGMP v1 membership report.
|
|
|
|
@param[in] IpSb The IP4 service instance that requests the
|
|
transmission
|
|
@param[in] Dst The destinaton to send to
|
|
@param[in] Type The IGMP message type, such as IGMP v1 membership
|
|
report
|
|
@param[in] Group The group address in the IGMP message head.
|
|
|
|
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory to build the message
|
|
@retval EFI_SUCCESS The IGMP message is successfully send
|
|
@retval Others Failed to send the IGMP message.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
Ip4SendIgmpMessage (
|
|
IN IP4_SERVICE *IpSb,
|
|
IN IP4_ADDR Dst,
|
|
IN UINT8 Type,
|
|
IN IP4_ADDR Group
|
|
)
|
|
{
|
|
IP4_HEAD Head;
|
|
NET_BUF *Packet;
|
|
IGMP_HEAD *Igmp;
|
|
|
|
//
|
|
// Allocate a net buffer to hold the message
|
|
//
|
|
Packet = NetbufAlloc (IP4_MAX_HEADLEN + sizeof (IGMP_HEAD));
|
|
|
|
if (Packet == NULL) {
|
|
return EFI_OUT_OF_RESOURCES;
|
|
}
|
|
|
|
//
|
|
// Fill in the IGMP and IP header, then transmit the message
|
|
//
|
|
NetbufReserve (Packet, IP4_MAX_HEADLEN);
|
|
|
|
Igmp = (IGMP_HEAD *) NetbufAllocSpace (Packet, sizeof (IGMP_HEAD), FALSE);
|
|
|
|
Igmp->Type = Type;
|
|
Igmp->MaxRespTime = 0;
|
|
Igmp->Checksum = 0;
|
|
Igmp->Group = HTONL (Group);
|
|
Igmp->Checksum = (UINT16) (~NetblockChecksum ((UINT8 *) Igmp, sizeof (IGMP_HEAD)));
|
|
|
|
Head.Tos = 0;
|
|
Head.Protocol = IP4_PROTO_IGMP;
|
|
Head.Ttl = 1;
|
|
Head.Fragment = 0;
|
|
Head.Dst = Dst;
|
|
Head.Src = IP4_ALLZERO_ADDRESS;
|
|
|
|
return Ip4Output (
|
|
IpSb,
|
|
NULL,
|
|
Packet,
|
|
&Head,
|
|
(UINT8 *) &mRouteAlertOption,
|
|
sizeof (UINT32),
|
|
IP4_ALLZERO_ADDRESS,
|
|
Ip4SysPacketSent,
|
|
NULL
|
|
);
|
|
}
|
|
|
|
|
|
/**
|
|
Send an IGMP membership report. Depends on whether the server is
|
|
v1 or v2, it will send either a V1 or V2 membership report.
|
|
|
|
@param[in] IpSb The IP4 service instance that requests the
|
|
transmission.
|
|
@param[in] Group The group address to report
|
|
|
|
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory to build the message
|
|
@retval EFI_SUCCESS The IGMP report message is successfully send
|
|
@retval Others Failed to send the report.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
Ip4SendIgmpReport (
|
|
IN IP4_SERVICE *IpSb,
|
|
IN IP4_ADDR Group
|
|
)
|
|
{
|
|
if (IpSb->IgmpCtrl.Igmpv1QuerySeen != 0) {
|
|
return Ip4SendIgmpMessage (IpSb, Group, IGMP_V1_MEMBERSHIP_REPORT, Group);
|
|
} else {
|
|
return Ip4SendIgmpMessage (IpSb, Group, IGMP_V2_MEMBERSHIP_REPORT, Group);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
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
|
|
)
|
|
{
|
|
EFI_MANAGED_NETWORK_PROTOCOL *Mnp;
|
|
IP4_SERVICE *IpSb;
|
|
IGMP_SERVICE_DATA *IgmpCtrl;
|
|
IGMP_GROUP *Group;
|
|
EFI_STATUS Status;
|
|
|
|
IpSb = IpInstance->Service;
|
|
IgmpCtrl = &IpSb->IgmpCtrl;
|
|
Mnp = IpSb->Mnp;
|
|
|
|
//
|
|
// If the IP service already is a member in the group, just
|
|
// increase the refernce count and return.
|
|
//
|
|
Group = Ip4FindGroup (IgmpCtrl, Address);
|
|
|
|
if (Group != NULL) {
|
|
Group->RefCnt++;
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
//
|
|
// Otherwise, create a new IGMP_GROUP, Get the multicast's MAC address,
|
|
// send a report, then direct MNP to receive the multicast.
|
|
//
|
|
Group = AllocatePool (sizeof (IGMP_GROUP));
|
|
|
|
if (Group == NULL) {
|
|
return EFI_OUT_OF_RESOURCES;
|
|
}
|
|
|
|
Group->Address = Address;
|
|
Group->RefCnt = 1;
|
|
Group->DelayTime = IGMP_UNSOLICIATED_REPORT;
|
|
Group->ReportByUs = TRUE;
|
|
|
|
Status = Ip4GetMulticastMac (Mnp, Address, &Group->Mac);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
goto ON_ERROR;
|
|
}
|
|
|
|
Status = Ip4SendIgmpReport (IpSb, Address);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
goto ON_ERROR;
|
|
}
|
|
|
|
Status = Mnp->Groups (Mnp, TRUE, &Group->Mac);
|
|
|
|
if (EFI_ERROR (Status) && (Status != EFI_ALREADY_STARTED)) {
|
|
goto ON_ERROR;
|
|
}
|
|
|
|
InsertHeadList (&IgmpCtrl->Groups, &Group->Link);
|
|
return EFI_SUCCESS;
|
|
|
|
ON_ERROR:
|
|
gBS->FreePool (Group);
|
|
return Status;
|
|
}
|
|
|
|
|
|
/**
|
|
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
|
|
)
|
|
{
|
|
EFI_MANAGED_NETWORK_PROTOCOL *Mnp;
|
|
IP4_SERVICE *IpSb;
|
|
IGMP_SERVICE_DATA *IgmpCtrl;
|
|
IGMP_GROUP *Group;
|
|
EFI_STATUS Status;
|
|
|
|
IpSb = IpInstance->Service;
|
|
IgmpCtrl = &IpSb->IgmpCtrl;
|
|
Mnp = IpSb->Mnp;
|
|
|
|
Group = Ip4FindGroup (IgmpCtrl, Address);
|
|
|
|
if (Group == NULL) {
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
|
|
//
|
|
// If more than one instance is in the group, decrease
|
|
// the RefCnt then return.
|
|
//
|
|
if (--Group->RefCnt > 0) {
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
//
|
|
// If multiple IP4 group addresses are mapped to the same
|
|
// multicast MAC address, don't configure the MNP to leave
|
|
// the MAC.
|
|
//
|
|
if (Ip4FindMac (IgmpCtrl, &Group->Mac) == 1) {
|
|
Status = Mnp->Groups (Mnp, FALSE, &Group->Mac);
|
|
|
|
if (EFI_ERROR (Status) && (Status != EFI_NOT_FOUND)) {
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Send a leave report if the membership is reported by us
|
|
// and we are talking IGMPv2.
|
|
//
|
|
if (Group->ReportByUs && IgmpCtrl->Igmpv1QuerySeen == 0) {
|
|
Ip4SendIgmpMessage (IpSb, IP4_ALLROUTER_ADDRESS, IGMP_LEAVE_GROUP, Group->Address);
|
|
}
|
|
|
|
RemoveEntryList (&Group->Link);
|
|
gBS->FreePool (Group);
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
|
|
/**
|
|
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 malformated.
|
|
@retval EFI_SUCCESS The IGMP message is successfully processed.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
Ip4IgmpHandle (
|
|
IN IP4_SERVICE *IpSb,
|
|
IN IP4_HEAD *Head,
|
|
IN NET_BUF *Packet
|
|
)
|
|
{
|
|
IGMP_SERVICE_DATA *IgmpCtrl;
|
|
IGMP_HEAD Igmp;
|
|
IGMP_GROUP *Group;
|
|
IP4_ADDR Address;
|
|
LIST_ENTRY *Entry;
|
|
|
|
IgmpCtrl = &IpSb->IgmpCtrl;
|
|
|
|
//
|
|
// Must checksum over the whole packet, later IGMP version
|
|
// may employ message longer than 8 bytes. IP's header has
|
|
// already been trimmed off.
|
|
//
|
|
if ((Packet->TotalSize < sizeof (Igmp)) || (NetbufChecksum (Packet) != 0)) {
|
|
NetbufFree (Packet);
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
//
|
|
// Copy the packet in case it is fragmented
|
|
//
|
|
NetbufCopy (Packet, 0, sizeof (IGMP_HEAD), (UINT8 *)&Igmp);
|
|
|
|
switch (Igmp.Type) {
|
|
case IGMP_MEMBERSHIP_QUERY:
|
|
//
|
|
// If MaxRespTime is zero, it is most likely that we are
|
|
// talking to a V1 router
|
|
//
|
|
if (Igmp.MaxRespTime == 0) {
|
|
IgmpCtrl->Igmpv1QuerySeen = IGMP_V1ROUTER_PRESENT;
|
|
Igmp.MaxRespTime = 100;
|
|
}
|
|
|
|
//
|
|
// Igmp is ticking once per second but MaxRespTime is in
|
|
// the unit of 100ms.
|
|
//
|
|
Igmp.MaxRespTime /= 10;
|
|
Address = NTOHL (Igmp.Group);
|
|
|
|
if (Address == IP4_ALLSYSTEM_ADDRESS) {
|
|
break;
|
|
}
|
|
|
|
NET_LIST_FOR_EACH (Entry, &IgmpCtrl->Groups) {
|
|
Group = NET_LIST_USER_STRUCT (Entry, IGMP_GROUP, Link);
|
|
|
|
//
|
|
// If address is all zero, all the memberships will be reported.
|
|
// otherwise only one is reported.
|
|
//
|
|
if ((Address == IP4_ALLZERO_ADDRESS) || (Address == Group->Address)) {
|
|
//
|
|
// If the timer is pending, only update it if the time left
|
|
// is longer than the MaxRespTime. TODO: randomize the DelayTime.
|
|
//
|
|
if ((Group->DelayTime == 0) || (Group->DelayTime > Igmp.MaxRespTime)) {
|
|
Group->DelayTime = MAX (1, Igmp.MaxRespTime);
|
|
}
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
case IGMP_V1_MEMBERSHIP_REPORT:
|
|
case IGMP_V2_MEMBERSHIP_REPORT:
|
|
Address = NTOHL (Igmp.Group);
|
|
Group = Ip4FindGroup (IgmpCtrl, Address);
|
|
|
|
if ((Group != NULL) && (Group->DelayTime > 0)) {
|
|
Group->DelayTime = 0;
|
|
Group->ReportByUs = FALSE;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
NetbufFree (Packet);
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
|
|
/**
|
|
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
|
|
)
|
|
{
|
|
IGMP_SERVICE_DATA *IgmpCtrl;
|
|
LIST_ENTRY *Entry;
|
|
IGMP_GROUP *Group;
|
|
|
|
IgmpCtrl = &IpSb->IgmpCtrl;
|
|
|
|
if (IgmpCtrl->Igmpv1QuerySeen > 0) {
|
|
IgmpCtrl->Igmpv1QuerySeen--;
|
|
}
|
|
|
|
//
|
|
// Decrease the report timer for each IGMP group in "delaying member"
|
|
//
|
|
NET_LIST_FOR_EACH (Entry, &IgmpCtrl->Groups) {
|
|
Group = NET_LIST_USER_STRUCT (Entry, IGMP_GROUP, Link);
|
|
ASSERT (Group->DelayTime >= 0);
|
|
|
|
if (Group->DelayTime > 0) {
|
|
Group->DelayTime--;
|
|
|
|
if (Group->DelayTime == 0) {
|
|
Ip4SendIgmpReport (IpSb, Group->Address);
|
|
Group->ReportByUs = TRUE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
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
|
|
)
|
|
{
|
|
IP4_ADDR *Groups;
|
|
|
|
Groups = AllocatePool (sizeof (IP4_ADDR) * (Count + 1));
|
|
|
|
if (Groups == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
CopyMem (Groups, Source, Count * sizeof (IP4_ADDR));
|
|
Groups[Count] = Addr;
|
|
|
|
return Groups;
|
|
}
|
|
|
|
|
|
/**
|
|
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 nubmer 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
|
|
)
|
|
{
|
|
UINT32 Index;
|
|
|
|
for (Index = 0; Index < Count; Index++) {
|
|
if (Groups[Index] == Addr) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
while (Index < Count - 1) {
|
|
Groups[Index] = Groups[Index + 1];
|
|
Index++;
|
|
}
|
|
|
|
return Index;
|
|
}
|