diff options
Diffstat (limited to 'Core/NetworkPkg/Ip6Dxe/Ip6If.c')
| -rw-r--r-- | Core/NetworkPkg/Ip6Dxe/Ip6If.c | 798 |
1 files changed, 798 insertions, 0 deletions
diff --git a/Core/NetworkPkg/Ip6Dxe/Ip6If.c b/Core/NetworkPkg/Ip6Dxe/Ip6If.c new file mode 100644 index 0000000000..280cd764f1 --- /dev/null +++ b/Core/NetworkPkg/Ip6Dxe/Ip6If.c @@ -0,0 +1,798 @@ +/** @file
+ Implement IP6 pesudo interface.
+
+ Copyright (c) 2009 - 2012, Intel Corporation. All rights reserved.<BR>
+
+ 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 "Ip6Impl.h"
+
+/**
+ Request Ip6OnFrameSentDpc as a DPC at TPL_CALLBACK.
+
+ @param[in] Event The transmit token's event.
+ @param[in] Context The Context which is pointed to the token.
+
+**/
+VOID
+EFIAPI
+Ip6OnFrameSent (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ );
+
+/**
+ Fileter function to cancel all the frame related to an IP instance.
+
+ @param[in] Frame The transmit request to test whether to cancel.
+ @param[in] Context The context which is the Ip instance that issued
+ the transmit.
+
+ @retval TRUE The frame belongs to this instance and is to be
+ removed.
+ @retval FALSE The frame doesn't belong to this instance.
+
+**/
+BOOLEAN
+Ip6CancelInstanceFrame (
+ IN IP6_LINK_TX_TOKEN *Frame,
+ IN VOID *Context
+ )
+{
+ if (Frame->IpInstance == (IP6_PROTOCOL *) Context) {
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+/**
+ Set the interface's address. This will trigger the DAD process for the
+ address to set. To set an already set address, the lifetimes wil be
+ updated to the new value passed in.
+
+ @param[in] Interface The interface to set the address.
+ @param[in] Ip6Addr The interface's to be assigned IPv6 address.
+ @param[in] IsAnycast If TRUE, the unicast IPv6 address is anycast.
+ Otherwise, it is not anycast.
+ @param[in] PrefixLength The prefix length of the Ip6Addr.
+ @param[in] ValidLifetime The valid lifetime for this address.
+ @param[in] PreferredLifetime The preferred lifetime for this address.
+ @param[in] DadCallback The caller's callback to trigger when DAD finishes.
+ This is an optional parameter that may be NULL.
+ @param[in] Context The context that will be passed to DadCallback.
+ This is an optional parameter that may be NULL.
+
+ @retval EFI_SUCCESS The interface is scheduled to be configured with
+ the specified address.
+ @retval EFI_OUT_OF_RESOURCES Failed to set the interface's address due to
+ lack of resources.
+
+**/
+EFI_STATUS
+Ip6SetAddress (
+ IN IP6_INTERFACE *Interface,
+ IN EFI_IPv6_ADDRESS *Ip6Addr,
+ IN BOOLEAN IsAnycast,
+ IN UINT8 PrefixLength,
+ IN UINT32 ValidLifetime,
+ IN UINT32 PreferredLifetime,
+ IN IP6_DAD_CALLBACK DadCallback OPTIONAL,
+ IN VOID *Context OPTIONAL
+ )
+{
+ IP6_SERVICE *IpSb;
+ IP6_ADDRESS_INFO *AddressInfo;
+ LIST_ENTRY *Entry;
+ IP6_PREFIX_LIST_ENTRY *PrefixEntry;
+ UINT64 Delay;
+ IP6_DELAY_JOIN_LIST *DelayNode;
+
+ NET_CHECK_SIGNATURE (Interface, IP6_INTERFACE_SIGNATURE);
+
+ IpSb = Interface->Service;
+
+ if (Ip6IsOneOfSetAddress (IpSb, Ip6Addr, NULL, &AddressInfo)) {
+ ASSERT (AddressInfo != NULL);
+ //
+ // Update the lifetime.
+ //
+ AddressInfo->ValidLifetime = ValidLifetime;
+ AddressInfo->PreferredLifetime = PreferredLifetime;
+
+ if (DadCallback != NULL) {
+ DadCallback (TRUE, Ip6Addr, Context);
+ }
+
+ return EFI_SUCCESS;
+ }
+
+ AddressInfo = (IP6_ADDRESS_INFO *) AllocatePool (sizeof (IP6_ADDRESS_INFO));
+ if (AddressInfo == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ AddressInfo->Signature = IP6_ADDR_INFO_SIGNATURE;
+ IP6_COPY_ADDRESS (&AddressInfo->Address, Ip6Addr);
+ AddressInfo->IsAnycast = IsAnycast;
+ AddressInfo->PrefixLength = PrefixLength;
+ AddressInfo->ValidLifetime = ValidLifetime;
+ AddressInfo->PreferredLifetime = PreferredLifetime;
+
+ if (AddressInfo->PrefixLength == 0) {
+ //
+ // Find an appropriate prefix from on-link prefixes and update the prefixlength.
+ // Longest prefix match is used here.
+ //
+ NET_LIST_FOR_EACH (Entry, &IpSb->OnlinkPrefix) {
+ PrefixEntry = NET_LIST_USER_STRUCT (Entry, IP6_PREFIX_LIST_ENTRY, Link);
+
+ if (NetIp6IsNetEqual (&PrefixEntry->Prefix, &AddressInfo->Address, PrefixEntry->PrefixLength)) {
+ AddressInfo->PrefixLength = PrefixEntry->PrefixLength;
+ break;
+ }
+ }
+ }
+
+ if (AddressInfo->PrefixLength == 0) {
+ //
+ // If the prefix length is still zero, try the autonomous prefixes.
+ // Longest prefix match is used here.
+ //
+ NET_LIST_FOR_EACH (Entry, &IpSb->AutonomousPrefix) {
+ PrefixEntry = NET_LIST_USER_STRUCT (Entry, IP6_PREFIX_LIST_ENTRY, Link);
+
+ if (NetIp6IsNetEqual (&PrefixEntry->Prefix, &AddressInfo->Address, PrefixEntry->PrefixLength)) {
+ AddressInfo->PrefixLength = PrefixEntry->PrefixLength;
+ break;
+ }
+ }
+ }
+
+ if (AddressInfo->PrefixLength == 0) {
+ //
+ // BUGBUG: Stil fail, use 64 as the default prefix length.
+ //
+ AddressInfo->PrefixLength = IP6_LINK_LOCAL_PREFIX_LENGTH;
+ }
+
+
+ //
+ // Node should delay joining the solicited-node mulitcast address by a random delay
+ // between 0 and MAX_RTR_SOLICITATION_DELAY (1 second).
+ // Thus queue the address to be processed in Duplicate Address Detection module
+ // after the delay time (in milliseconds).
+ //
+ Delay = (UINT64) NET_RANDOM (NetRandomInitSeed ());
+ Delay = MultU64x32 (Delay, IP6_ONE_SECOND_IN_MS);
+ Delay = RShiftU64 (Delay, 32);
+
+ DelayNode = (IP6_DELAY_JOIN_LIST *) AllocatePool (sizeof (IP6_DELAY_JOIN_LIST));
+ if (DelayNode == NULL) {
+ FreePool (AddressInfo);
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ DelayNode->DelayTime = (UINT32) (DivU64x32 (Delay, IP6_TIMER_INTERVAL_IN_MS));
+ DelayNode->Interface = Interface;
+ DelayNode->AddressInfo = AddressInfo;
+ DelayNode->DadCallback = DadCallback;
+ DelayNode->Context = Context;
+
+ InsertTailList (&Interface->DelayJoinList, &DelayNode->Link);
+ return EFI_SUCCESS;
+}
+
+/**
+ Create an IP6_INTERFACE.
+
+ @param[in] IpSb The IP6 service binding instance.
+ @param[in] LinkLocal If TRUE, the instance is created for link-local address.
+ Otherwise, it is not for a link-local address.
+
+ @return Point to the created IP6_INTERFACE, otherwise NULL.
+
+**/
+IP6_INTERFACE *
+Ip6CreateInterface (
+ IN IP6_SERVICE *IpSb,
+ IN BOOLEAN LinkLocal
+ )
+{
+ EFI_STATUS Status;
+ IP6_INTERFACE *Interface;
+ EFI_IPv6_ADDRESS *Ip6Addr;
+
+ NET_CHECK_SIGNATURE (IpSb, IP6_SERVICE_SIGNATURE);
+
+ Interface = AllocatePool (sizeof (IP6_INTERFACE));
+ if (Interface == NULL) {
+ return NULL;
+ }
+
+ Interface->Signature = IP6_INTERFACE_SIGNATURE;
+ Interface->RefCnt = 1;
+
+ InitializeListHead (&Interface->AddressList);
+ Interface->AddressCount = 0;
+ Interface->Configured = FALSE;
+
+ Interface->Service = IpSb;
+ Interface->Controller = IpSb->Controller;
+ Interface->Image = IpSb->Image;
+
+ InitializeListHead (&Interface->ArpQues);
+ InitializeListHead (&Interface->SentFrames);
+
+ Interface->DupAddrDetect = IpSb->Ip6ConfigInstance.DadXmits.DupAddrDetectTransmits;
+ InitializeListHead (&Interface->DupAddrDetectList);
+
+ InitializeListHead (&Interface->DelayJoinList);
+
+ InitializeListHead (&Interface->IpInstances);
+ Interface->PromiscRecv = FALSE;
+
+ if (!LinkLocal) {
+ return Interface;
+ }
+
+ //
+ // Get the link local addr
+ //
+ Ip6Addr = Ip6CreateLinkLocalAddr (IpSb);
+ if (Ip6Addr == NULL) {
+ goto ON_ERROR;
+ }
+
+ //
+ // Perform DAD - Duplicate Address Detection.
+ //
+ Status = Ip6SetAddress (
+ Interface,
+ Ip6Addr,
+ FALSE,
+ IP6_LINK_LOCAL_PREFIX_LENGTH,
+ (UINT32) IP6_INFINIT_LIFETIME,
+ (UINT32) IP6_INFINIT_LIFETIME,
+ NULL,
+ NULL
+ );
+
+ FreePool (Ip6Addr);
+
+ if (EFI_ERROR (Status)) {
+ goto ON_ERROR;
+ }
+
+ return Interface;
+
+ON_ERROR:
+
+ FreePool (Interface);
+ return NULL;
+}
+
+/**
+ Free the interface used by IpInstance. All the IP instance with
+ the same Ip/prefix pair share the same interface. It is reference
+ counted. All the frames that haven't been sent will be cancelled.
+ Because the IpInstance is optional, the caller must remove
+ IpInstance from the interface's instance list.
+
+ @param[in] Interface The interface used by the IpInstance.
+ @param[in] IpInstance The IP instance that free the interface. NULL if
+ the IP driver is releasing the default interface.
+
+**/
+VOID
+Ip6CleanInterface (
+ IN IP6_INTERFACE *Interface,
+ IN IP6_PROTOCOL *IpInstance OPTIONAL
+ )
+{
+ IP6_DAD_ENTRY *Duplicate;
+ IP6_DELAY_JOIN_LIST *Delay;
+
+ NET_CHECK_SIGNATURE (Interface, IP6_INTERFACE_SIGNATURE);
+ ASSERT (Interface->RefCnt > 0);
+
+ //
+ // Remove all the pending transmit token related to this IP instance.
+ //
+ Ip6CancelFrames (Interface, EFI_ABORTED, Ip6CancelInstanceFrame, IpInstance);
+
+ if (--Interface->RefCnt > 0) {
+ return;
+ }
+
+ //
+ // Destroy the interface if this is the last IP instance.
+ // Remove all the system transmitted packets
+ // from this interface, cancel the receive request if exists.
+ //
+ Ip6CancelFrames (Interface, EFI_ABORTED, Ip6CancelInstanceFrame, NULL);
+
+ ASSERT (IsListEmpty (&Interface->IpInstances));
+ ASSERT (IsListEmpty (&Interface->ArpQues));
+ ASSERT (IsListEmpty (&Interface->SentFrames));
+
+ while (!IsListEmpty (&Interface->DupAddrDetectList)) {
+ Duplicate = NET_LIST_HEAD (&Interface->DupAddrDetectList, IP6_DAD_ENTRY, Link);
+ NetListRemoveHead (&Interface->DupAddrDetectList);
+ FreePool (Duplicate);
+ }
+
+ while (!IsListEmpty (&Interface->DelayJoinList)) {
+ Delay = NET_LIST_HEAD (&Interface->DelayJoinList, IP6_DELAY_JOIN_LIST, Link);
+ NetListRemoveHead (&Interface->DelayJoinList);
+ FreePool (Delay);
+ }
+
+ Ip6RemoveAddr (Interface->Service, &Interface->AddressList, &Interface->AddressCount, NULL, 0);
+
+ RemoveEntryList (&Interface->Link);
+ FreePool (Interface);
+}
+
+/**
+ Create and wrap a transmit request into a newly allocated IP6_LINK_TX_TOKEN.
+
+ @param[in] Interface The interface to send out from.
+ @param[in] IpInstance The IpInstance that transmit the packet. NULL if
+ the packet is sent by the IP6 driver itself.
+ @param[in] Packet The packet to transmit
+ @param[in] CallBack Call back function to execute if transmission
+ finished.
+ @param[in] Context Opaque parameter to the callback.
+
+ @return The wrapped token if succeed or NULL.
+
+**/
+IP6_LINK_TX_TOKEN *
+Ip6CreateLinkTxToken (
+ IN IP6_INTERFACE *Interface,
+ IN IP6_PROTOCOL *IpInstance OPTIONAL,
+ IN NET_BUF *Packet,
+ IN IP6_FRAME_CALLBACK CallBack,
+ IN VOID *Context
+ )
+{
+ EFI_MANAGED_NETWORK_COMPLETION_TOKEN *MnpToken;
+ EFI_MANAGED_NETWORK_TRANSMIT_DATA *MnpTxData;
+ IP6_LINK_TX_TOKEN *Token;
+ EFI_STATUS Status;
+ UINT32 Count;
+
+ Token = AllocatePool (sizeof (IP6_LINK_TX_TOKEN) + (Packet->BlockOpNum - 1) * sizeof (EFI_MANAGED_NETWORK_FRAGMENT_DATA));
+
+ if (Token == NULL) {
+ return NULL;
+ }
+
+ Token->Signature = IP6_LINK_TX_SIGNATURE;
+ InitializeListHead (&Token->Link);
+
+ Token->IpInstance = IpInstance;
+ Token->CallBack = CallBack;
+ Token->Packet = Packet;
+ Token->Context = Context;
+ ZeroMem (&Token->DstMac, sizeof (EFI_MAC_ADDRESS));
+ IP6_COPY_LINK_ADDRESS (&Token->SrcMac, &Interface->Service->SnpMode.CurrentAddress);
+
+ MnpToken = &(Token->MnpToken);
+ MnpToken->Status = EFI_NOT_READY;
+
+ Status = gBS->CreateEvent (
+ EVT_NOTIFY_SIGNAL,
+ TPL_NOTIFY,
+ Ip6OnFrameSent,
+ Token,
+ &MnpToken->Event
+ );
+
+ if (EFI_ERROR (Status)) {
+ FreePool (Token);
+ return NULL;
+ }
+
+ MnpTxData = &Token->MnpTxData;
+ MnpToken->Packet.TxData = MnpTxData;
+
+ MnpTxData->DestinationAddress = &Token->DstMac;
+ MnpTxData->SourceAddress = &Token->SrcMac;
+ MnpTxData->ProtocolType = IP6_ETHER_PROTO;
+ MnpTxData->DataLength = Packet->TotalSize;
+ MnpTxData->HeaderLength = 0;
+
+ Count = Packet->BlockOpNum;
+
+ NetbufBuildExt (Packet, (NET_FRAGMENT *) MnpTxData->FragmentTable, &Count);
+ MnpTxData->FragmentCount = (UINT16)Count;
+
+ return Token;
+}
+
+/**
+ Free the link layer transmit token. It will close the event,
+ then free the memory used.
+
+ @param[in] Token Token to free.
+
+**/
+VOID
+Ip6FreeLinkTxToken (
+ IN IP6_LINK_TX_TOKEN *Token
+ )
+{
+ NET_CHECK_SIGNATURE (Token, IP6_LINK_TX_SIGNATURE);
+
+ gBS->CloseEvent (Token->MnpToken.Event);
+ FreePool (Token);
+}
+
+/**
+ Callback function when the received packet is freed.
+ Check Ip6OnFrameReceived for information.
+
+ @param[in] Context Points to EFI_MANAGED_NETWORK_RECEIVE_DATA.
+
+**/
+VOID
+EFIAPI
+Ip6RecycleFrame (
+ IN VOID *Context
+ )
+{
+ EFI_MANAGED_NETWORK_RECEIVE_DATA *RxData;
+
+ RxData = (EFI_MANAGED_NETWORK_RECEIVE_DATA *) Context;
+
+ gBS->SignalEvent (RxData->RecycleEvent);
+}
+
+/**
+ Received a frame from MNP. Wrap it in net buffer then deliver
+ it to IP's input function. The ownship of the packet also
+ is transferred to IP. When Ip is finished with this packet, it
+ will call NetbufFree to release the packet, NetbufFree will
+ again call the Ip6RecycleFrame to signal MNP's event and free
+ the token used.
+
+ @param[in] Context Context for the callback.
+
+**/
+VOID
+EFIAPI
+Ip6OnFrameReceivedDpc (
+ IN VOID *Context
+ )
+{
+ EFI_MANAGED_NETWORK_COMPLETION_TOKEN *MnpToken;
+ EFI_MANAGED_NETWORK_RECEIVE_DATA *MnpRxData;
+ IP6_LINK_RX_TOKEN *Token;
+ NET_FRAGMENT Netfrag;
+ NET_BUF *Packet;
+ UINT32 Flag;
+ IP6_SERVICE *IpSb;
+
+ Token = (IP6_LINK_RX_TOKEN *) Context;
+ NET_CHECK_SIGNATURE (Token, IP6_LINK_RX_SIGNATURE);
+
+ //
+ // First clear the interface's receive request in case the
+ // caller wants to call Ip6ReceiveFrame in the callback.
+ //
+ IpSb = (IP6_SERVICE *) Token->Context;
+ NET_CHECK_SIGNATURE (IpSb, IP6_SERVICE_SIGNATURE);
+
+
+ MnpToken = &Token->MnpToken;
+ MnpRxData = MnpToken->Packet.RxData;
+
+ if (EFI_ERROR (MnpToken->Status) || (MnpRxData == NULL)) {
+ Token->CallBack (NULL, MnpToken->Status, 0, Token->Context);
+ return ;
+ }
+
+ //
+ // Wrap the frame in a net buffer then deliever it to IP input.
+ // IP will reassemble the packet, and deliver it to upper layer
+ //
+ Netfrag.Len = MnpRxData->DataLength;
+ Netfrag.Bulk = MnpRxData->PacketData;
+
+ Packet = NetbufFromExt (&Netfrag, 1, IP6_MAX_HEADLEN, 0, Ip6RecycleFrame, Token->MnpToken.Packet.RxData);
+
+ if (Packet == NULL) {
+ gBS->SignalEvent (MnpRxData->RecycleEvent);
+
+ Token->CallBack (NULL, EFI_OUT_OF_RESOURCES, 0, Token->Context);
+
+ return ;
+ }
+
+ Flag = (MnpRxData->BroadcastFlag ? IP6_LINK_BROADCAST : 0);
+ Flag |= (MnpRxData->MulticastFlag ? IP6_LINK_MULTICAST : 0);
+ Flag |= (MnpRxData->PromiscuousFlag ? IP6_LINK_PROMISC : 0);
+
+ Token->CallBack (Packet, EFI_SUCCESS, Flag, Token->Context);
+}
+
+/**
+ Request Ip6OnFrameReceivedDpc as a DPC at TPL_CALLBACK.
+
+ @param Event The receive event delivered to MNP for receive.
+ @param Context Context for the callback.
+
+**/
+VOID
+EFIAPI
+Ip6OnFrameReceived (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ //
+ // Request Ip6OnFrameReceivedDpc as a DPC at TPL_CALLBACK
+ //
+ QueueDpc (TPL_CALLBACK, Ip6OnFrameReceivedDpc, Context);
+}
+
+/**
+ Request to receive the packet from the interface.
+
+ @param[in] CallBack Function to call when receive finished.
+ @param[in] IpSb Points to IP6 service binding instance.
+
+ @retval EFI_ALREADY_STARTED There is already a pending receive request.
+ @retval EFI_OUT_OF_RESOURCES Failed to allocate resource to receive.
+ @retval EFI_SUCCESS The recieve request has been started.
+
+**/
+EFI_STATUS
+Ip6ReceiveFrame (
+ IN IP6_FRAME_CALLBACK CallBack,
+ IN IP6_SERVICE *IpSb
+ )
+{
+ EFI_STATUS Status;
+ IP6_LINK_RX_TOKEN *Token;
+
+ NET_CHECK_SIGNATURE (IpSb, IP6_SERVICE_SIGNATURE);
+
+ Token = &IpSb->RecvRequest;
+ Token->CallBack = CallBack;
+ Token->Context = (VOID *) IpSb;
+
+ Status = IpSb->Mnp->Receive (IpSb->Mnp, &Token->MnpToken);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Callback funtion when frame transmission is finished. It will
+ call the frame owner's callback function to tell it the result.
+
+ @param[in] Context Context which points to the token.
+
+**/
+VOID
+EFIAPI
+Ip6OnFrameSentDpc (
+ IN VOID *Context
+ )
+{
+ IP6_LINK_TX_TOKEN *Token;
+
+ Token = (IP6_LINK_TX_TOKEN *) Context;
+ NET_CHECK_SIGNATURE (Token, IP6_LINK_TX_SIGNATURE);
+
+ RemoveEntryList (&Token->Link);
+
+ Token->CallBack (
+ Token->Packet,
+ Token->MnpToken.Status,
+ 0,
+ Token->Context
+ );
+
+ Ip6FreeLinkTxToken (Token);
+}
+
+/**
+ Request Ip6OnFrameSentDpc as a DPC at TPL_CALLBACK.
+
+ @param[in] Event The transmit token's event.
+ @param[in] Context Context which points to the token.
+
+**/
+VOID
+EFIAPI
+Ip6OnFrameSent (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ //
+ // Request Ip6OnFrameSentDpc as a DPC at TPL_CALLBACK
+ //
+ QueueDpc (TPL_CALLBACK, Ip6OnFrameSentDpc, Context);
+}
+
+/**
+ Send a frame from the interface. If the next hop is a multicast address,
+ it is transmitted immediately. If the next hop is a unicast,
+ and the NextHop's MAC is not known, it will perform address resolution.
+ If an error occurred, the CallBack won't be called. So, the caller
+ must test the return value, and take action when there is an error.
+
+ @param[in] Interface The interface to send the frame from
+ @param[in] IpInstance The IP child that request the transmission.
+ NULL if it is the IP6 driver itself.
+ @param[in] Packet The packet to transmit.
+ @param[in] NextHop The immediate destination to transmit the packet to.
+ @param[in] CallBack Function to call back when transmit finished.
+ @param[in] Context Opaque parameter to the callback.
+
+ @retval EFI_OUT_OF_RESOURCES Failed to allocate resource to send the frame.
+ @retval EFI_NO_MAPPING Can't resolve the MAC for the nexthop.
+ @retval EFI_SUCCESS The packet successfully transmitted.
+
+**/
+EFI_STATUS
+Ip6SendFrame (
+ IN IP6_INTERFACE *Interface,
+ IN IP6_PROTOCOL *IpInstance OPTIONAL,
+ IN NET_BUF *Packet,
+ IN EFI_IPv6_ADDRESS *NextHop,
+ IN IP6_FRAME_CALLBACK CallBack,
+ IN VOID *Context
+ )
+{
+ IP6_SERVICE *IpSb;
+ IP6_LINK_TX_TOKEN *Token;
+ EFI_STATUS Status;
+ IP6_NEIGHBOR_ENTRY *NeighborCache;
+ LIST_ENTRY *Entry;
+ IP6_NEIGHBOR_ENTRY *ArpQue;
+
+ IpSb = Interface->Service;
+ NET_CHECK_SIGNATURE (IpSb, IP6_SERVICE_SIGNATURE);
+
+ //
+ // Only when link local address is performing DAD, the interface could be used in unconfigured.
+ //
+ if (IpSb->LinkLocalOk) {
+ ASSERT (Interface->Configured);
+ }
+
+ Token = Ip6CreateLinkTxToken (Interface, IpInstance, Packet, CallBack, Context);
+
+ if (Token == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ if (IP6_IS_MULTICAST (NextHop)) {
+ Status = Ip6GetMulticastMac (IpSb->Mnp, NextHop, &Token->DstMac);
+ if (EFI_ERROR (Status)) {
+ goto Error;
+ }
+
+ goto SendNow;
+ }
+
+ //
+ // If send to itself, directly send out
+ //
+ if (EFI_IP6_EQUAL (&Packet->Ip.Ip6->DestinationAddress, &Packet->Ip.Ip6->SourceAddress)) {
+ IP6_COPY_LINK_ADDRESS (&Token->DstMac, &IpSb->SnpMode.CurrentAddress);
+ goto SendNow;
+ }
+
+ //
+ // If unicast, check the neighbor state.
+ //
+
+ NeighborCache = Ip6FindNeighborEntry (IpSb, NextHop);
+ ASSERT (NeighborCache != NULL);
+
+ if (NeighborCache->Interface == NULL) {
+ NeighborCache->Interface = Interface;
+ }
+
+ switch (NeighborCache->State) {
+ case EfiNeighborStale:
+ NeighborCache->State = EfiNeighborDelay;
+ NeighborCache->Ticks = (UINT32) IP6_GET_TICKS (IP6_DELAY_FIRST_PROBE_TIME);
+ //
+ // Fall through
+ //
+ case EfiNeighborReachable:
+ case EfiNeighborDelay:
+ case EfiNeighborProbe:
+ IP6_COPY_LINK_ADDRESS (&Token->DstMac, &NeighborCache->LinkAddress);
+ goto SendNow;
+ break;
+
+ default:
+ break;
+ }
+
+ //
+ // Have to do asynchronous ARP resolution. First check whether there is
+ // already a pending request.
+ //
+ NET_LIST_FOR_EACH (Entry, &Interface->ArpQues) {
+ ArpQue = NET_LIST_USER_STRUCT (Entry, IP6_NEIGHBOR_ENTRY, ArpList);
+ if (ArpQue == NeighborCache) {
+ InsertTailList (&NeighborCache->Frames, &Token->Link);
+ NeighborCache->ArpFree = TRUE;
+ return EFI_SUCCESS;
+ }
+ }
+
+ //
+ // First frame requires ARP.
+ //
+ InsertTailList (&NeighborCache->Frames, &Token->Link);
+ InsertTailList (&Interface->ArpQues, &NeighborCache->ArpList);
+
+ NeighborCache->ArpFree = TRUE;
+
+ return EFI_SUCCESS;
+
+SendNow:
+ //
+ // Insert the tx token into the SentFrames list before calling Mnp->Transmit.
+ // Remove it if the returned status is not EFI_SUCCESS.
+ //
+ InsertTailList (&Interface->SentFrames, &Token->Link);
+ Status = IpSb->Mnp->Transmit (IpSb->Mnp, &Token->MnpToken);
+ if (EFI_ERROR (Status)) {
+ RemoveEntryList (&Token->Link);
+ goto Error;
+ }
+
+ return EFI_SUCCESS;
+
+Error:
+ Ip6FreeLinkTxToken (Token);
+ return Status;
+}
+
+/**
+ The heartbeat timer of IP6 service instance. It times out
+ all of its IP6 children's received-but-not-delivered and
+ transmitted-but-not-recycle packets.
+
+ @param[in] Event The IP6 service instance's heartbeat timer.
+ @param[in] Context The IP6 service instance.
+
+**/
+VOID
+EFIAPI
+Ip6TimerTicking (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ IP6_SERVICE *IpSb;
+
+ IpSb = (IP6_SERVICE *) Context;
+ NET_CHECK_SIGNATURE (IpSb, IP6_SERVICE_SIGNATURE);
+
+ Ip6PacketTimerTicking (IpSb);
+ Ip6NdTimerTicking (IpSb);
+ Ip6MldTimerTicking (IpSb);
+}
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