diff options
| author | hhtian <hhtian@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-11-01 06:13:54 +0000 |
|---|---|---|
| committer | hhtian <hhtian@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-11-01 06:13:54 +0000 |
| commit | a3bcde70e6dc69000f85cc5deee98101d2ae200a (patch) | |
| tree | 693709a5293f80b320931693b34b2d6983cfcf4b /NetworkPkg/Ip6Dxe/Ip6Output.c | |
| parent | 12873d57666d0beff41959a1fb8f9062016f0983 (diff) | |
| download | edk2-a3bcde70e6dc69000f85cc5deee98101d2ae200a.tar.gz edk2-a3bcde70e6dc69000f85cc5deee98101d2ae200a.tar.bz2 edk2-a3bcde70e6dc69000f85cc5deee98101d2ae200a.zip | |
Add NetworkPkg (P.UDK2010.UP3.Network.P1)
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10986 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'NetworkPkg/Ip6Dxe/Ip6Output.c')
| -rw-r--r-- | NetworkPkg/Ip6Dxe/Ip6Output.c | 1077 |
1 files changed, 1077 insertions, 0 deletions
diff --git a/NetworkPkg/Ip6Dxe/Ip6Output.c b/NetworkPkg/Ip6Dxe/Ip6Output.c new file mode 100644 index 0000000000..baa4904fc9 --- /dev/null +++ b/NetworkPkg/Ip6Dxe/Ip6Output.c @@ -0,0 +1,1077 @@ +/** @file
+ The internal functions and routines to transmit the IP6 packet.
+
+ Copyright (c) 2009 - 2010, 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"
+
+UINT32 mIp6Id;
+
+/**
+ Output all the available source addresses to a list entry head SourceList. The
+ number of source addresses are also returned.
+
+ @param[in] IpSb Points to an IP6 service binding instance.
+ @param[out] SourceList The list entry head of all source addresses.
+ It is the caller's responsiblity to free the
+ resources.
+ @param[out] SourceCount The number of source addresses.
+
+ @retval EFI_SUCCESS The source addresses were copied to a list entry head
+ SourceList.
+ @retval EFI_OUT_OF_RESOURCES Failed to allocate resources to complete the operation.
+
+**/
+EFI_STATUS
+Ip6CandidateSource (
+ IN IP6_SERVICE *IpSb,
+ OUT LIST_ENTRY *SourceList,
+ OUT UINT32 *SourceCount
+ )
+{
+ IP6_INTERFACE *IpIf;
+ LIST_ENTRY *Entry;
+ LIST_ENTRY *Entry2;
+ IP6_ADDRESS_INFO *AddrInfo;
+ IP6_ADDRESS_INFO *Copy;
+
+ *SourceCount = 0;
+
+ if (IpSb->LinkLocalOk) {
+ Copy = AllocatePool (sizeof (IP6_ADDRESS_INFO));
+ if (Copy == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ Copy->Signature = IP6_ADDR_INFO_SIGNATURE;
+ IP6_COPY_ADDRESS (&Copy->Address, &IpSb->LinkLocalAddr);
+ Copy->IsAnycast = FALSE;
+ Copy->PrefixLength = IP6_LINK_LOCAL_PREFIX_LENGTH;
+ Copy->ValidLifetime = (UINT32) IP6_INFINIT_LIFETIME;
+ Copy->PreferredLifetime = (UINT32) IP6_INFINIT_LIFETIME;
+
+ InsertTailList (SourceList, &Copy->Link);
+ (*SourceCount)++;
+ }
+
+ NET_LIST_FOR_EACH (Entry, &IpSb->Interfaces) {
+ IpIf = NET_LIST_USER_STRUCT (Entry, IP6_INTERFACE, Link);
+
+ NET_LIST_FOR_EACH (Entry2, &IpIf->AddressList) {
+ AddrInfo = NET_LIST_USER_STRUCT_S (Entry2, IP6_ADDRESS_INFO, Link, IP6_ADDR_INFO_SIGNATURE);
+
+ if (AddrInfo->IsAnycast) {
+ //
+ // Never use an anycast address.
+ //
+ continue;
+ }
+
+ Copy = AllocateCopyPool (sizeof (IP6_ADDRESS_INFO), AddrInfo);
+ if (Copy == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ InsertTailList (SourceList, &Copy->Link);
+ (*SourceCount)++;
+ }
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Caculate how many bits are the same between two IPv6 addresses.
+
+ @param[in] AddressA Points to an IPv6 address.
+ @param[in] AddressB Points to another IPv6 address.
+
+ @return The common bits of the AddressA and AddressB.
+
+**/
+UINT8
+Ip6CommonPrefixLen (
+ IN EFI_IPv6_ADDRESS *AddressA,
+ IN EFI_IPv6_ADDRESS *AddressB
+ )
+{
+ UINT8 Count;
+ UINT8 Index;
+ UINT8 ByteA;
+ UINT8 ByteB;
+ UINT8 NumBits;
+
+ Count = 0;
+ Index = 0;
+
+ while (Index < 16) {
+ ByteA = AddressA->Addr[Index];
+ ByteB = AddressB->Addr[Index];
+
+ if (ByteA == ByteB) {
+ Count += 8;
+ Index++;
+ continue;
+ }
+
+ //
+ // Check how many bits are common between the two bytes.
+ //
+ NumBits = 8;
+ ByteA = (UINT8) (ByteA ^ ByteB);
+
+ while (ByteA != 0) {
+ NumBits--;
+ ByteA = (UINT8) (ByteA >> 1);
+ }
+
+ return (UINT8) (Count + NumBits);
+ }
+
+ return Count;
+}
+
+/**
+ Output all the available source addresses to a list entry head SourceList. The
+ number of source addresses are also returned.
+
+ @param[in] IpSb Points to a IP6 service binding instance.
+ @param[in] Destination The IPv6 destination address.
+ @param[out] Source The selected IPv6 source address according to
+ the Destination.
+
+ @retval EFI_SUCCESS The source addresses were copied to a list entry
+ head SourceList.
+ @retval EFI_NO_MAPPING The IPv6 stack is not auto configured.
+
+**/
+EFI_STATUS
+Ip6SelectSourceAddress (
+ IN IP6_SERVICE *IpSb,
+ IN EFI_IPv6_ADDRESS *Destination,
+ OUT EFI_IPv6_ADDRESS *Source
+ )
+{
+ EFI_STATUS Status;
+ LIST_ENTRY SourceList;
+ UINT32 SourceCount;
+ UINT8 ScopeD;
+ LIST_ENTRY *Entry;
+ IP6_ADDRESS_INFO *AddrInfo;
+ IP6_PREFIX_LIST_ENTRY *Prefix;
+ UINT8 LastCommonLength;
+ UINT8 CurrentCommonLength;
+ EFI_IPv6_ADDRESS *TmpAddress;
+
+ NET_CHECK_SIGNATURE (IpSb, IP6_SERVICE_SIGNATURE);
+
+ Status = EFI_SUCCESS;
+ InitializeListHead (&SourceList);
+
+ if (!IpSb->LinkLocalOk) {
+ return EFI_NO_MAPPING;
+ }
+
+ //
+ // Rule 1: Prefer same address.
+ //
+ if (Ip6IsOneOfSetAddress (IpSb, Destination, NULL, NULL)) {
+ IP6_COPY_ADDRESS (Source, Destination);
+ goto Exit;
+ }
+
+ //
+ // Rule 2: Prefer appropriate scope.
+ //
+ if (IP6_IS_MULTICAST (Destination)) {
+ ScopeD = (UINT8) (Destination->Addr[1] >> 4);
+ } else if (NetIp6IsLinkLocalAddr (Destination)) {
+ ScopeD = 0x2;
+ } else {
+ ScopeD = 0xE;
+ }
+
+ if (ScopeD <= 0x2) {
+ //
+ // Return the link-local address if it exists
+ // One IP6_SERVICE only has one link-local address.
+ //
+ IP6_COPY_ADDRESS (Source, &IpSb->LinkLocalAddr);
+ goto Exit;
+ }
+
+ //
+ // All candidate source addresses are global unicast address.
+ //
+ Ip6CandidateSource (IpSb, &SourceList, &SourceCount);
+
+ if (SourceCount == 0) {
+ Status = EFI_NO_MAPPING;
+ goto Exit;
+ }
+
+ IP6_COPY_ADDRESS (Source, &IpSb->LinkLocalAddr);
+
+ if (SourceCount == 1) {
+ goto Exit;
+ }
+
+ //
+ // Rule 3: Avoid deprecated addresses.
+ // TODO: check the "deprecated" state of the stateful configured address
+ //
+ NET_LIST_FOR_EACH (Entry, &IpSb->AutonomousPrefix) {
+ Prefix = NET_LIST_USER_STRUCT (Entry, IP6_PREFIX_LIST_ENTRY, Link);
+ if (Prefix->PreferredLifetime == 0) {
+ Ip6RemoveAddr (NULL, &SourceList, &SourceCount, &Prefix->Prefix, Prefix->PrefixLength);
+
+ if (SourceCount == 1) {
+ goto Exit;
+ }
+ }
+ }
+
+ //
+ // TODO: Rule 4: Prefer home addresses.
+ // TODO: Rule 5: Prefer outgoing interface.
+ // TODO: Rule 6: Prefer matching label.
+ // TODO: Rule 7: Prefer public addresses.
+ //
+
+ //
+ // Rule 8: Use longest matching prefix.
+ //
+ LastCommonLength = Ip6CommonPrefixLen (Source, Destination);
+ TmpAddress = NULL;
+
+ for (Entry = SourceList.ForwardLink; Entry != &SourceList; Entry = Entry->ForwardLink) {
+ AddrInfo = NET_LIST_USER_STRUCT_S (Entry, IP6_ADDRESS_INFO, Link, IP6_ADDR_INFO_SIGNATURE);
+
+ CurrentCommonLength = Ip6CommonPrefixLen (&AddrInfo->Address, Destination);
+ if (CurrentCommonLength > LastCommonLength) {
+ LastCommonLength = CurrentCommonLength;
+ TmpAddress = &AddrInfo->Address;
+ }
+ }
+
+ if (TmpAddress != NULL) {
+ IP6_COPY_ADDRESS (Source, TmpAddress);
+ }
+
+Exit:
+
+ Ip6RemoveAddr (NULL, &SourceList, &SourceCount, NULL, 0);
+
+ return Status;
+}
+
+/**
+ Select an interface to send the packet generated in the IP6 driver
+ itself: that is, not by the requests of the IP6 child's consumer. Such
+ packets include the ICMPv6 echo replies and other ICMPv6 error packets.
+
+ @param[in] IpSb The IP4 service that wants to send the packets.
+ @param[in] Destination The destination of the packet.
+ @param[in, out] Source The source of the packet.
+
+ @return NULL if no proper interface is found, otherwise, the interface that
+ can be used to send the system packet from.
+
+**/
+IP6_INTERFACE *
+Ip6SelectInterface (
+ IN IP6_SERVICE *IpSb,
+ IN EFI_IPv6_ADDRESS *Destination,
+ IN OUT EFI_IPv6_ADDRESS *Source
+ )
+{
+ EFI_STATUS Status;
+ EFI_IPv6_ADDRESS SelectedSource;
+ IP6_INTERFACE *IpIf;
+ BOOLEAN Exist;
+
+ NET_CHECK_SIGNATURE (IpSb, IP6_SERVICE_SIGNATURE);
+ ASSERT (Destination != NULL && Source != NULL);
+
+ if (NetIp6IsUnspecifiedAddr (Destination)) {
+ return NULL;
+ }
+
+ if (!NetIp6IsUnspecifiedAddr (Source)) {
+ Exist = Ip6IsOneOfSetAddress (IpSb, Source, &IpIf, NULL);
+ ASSERT (Exist);
+
+ return IpIf;
+ }
+
+ //
+ // If source is unspecified, select a source according to the destination.
+ //
+ Status = Ip6SelectSourceAddress (IpSb, Destination, &SelectedSource);
+ if (EFI_ERROR (Status)) {
+ return IpSb->DefaultInterface;
+ }
+
+ Ip6IsOneOfSetAddress (IpSb, &SelectedSource, &IpIf, NULL);
+ IP6_COPY_ADDRESS (Source, &SelectedSource);
+
+ return IpIf;
+}
+
+/**
+ The default callback function for the system generated packet.
+ It will free the packet.
+
+ @param[in] Packet The packet that transmitted.
+ @param[in] IoStatus The result of the transmission, succeeded or failed.
+ @param[in] LinkFlag Not used when transmitted. Check IP6_FRAME_CALLBACK
+ for reference.
+ @param[in] Context The context provided by us.
+
+**/
+VOID
+Ip6SysPacketSent (
+ NET_BUF *Packet,
+ EFI_STATUS IoStatus,
+ UINT32 LinkFlag,
+ VOID *Context
+ )
+{
+ NetbufFree (Packet);
+ Packet = NULL;
+}
+
+/**
+ Prefix an IP6 basic head and unfragmentable extension headers and a fragment header
+ to the Packet. Used for IP6 fragmentation.
+
+ @param[in] IpSb The IP6 service instance to transmit the packet.
+ @param[in] Packet The packet to prefix the IP6 header to.
+ @param[in] Head The caller supplied header.
+ @param[in] FragmentOffset The fragment offset of the data following the header.
+ @param[in] ExtHdrs The length of the original extension header.
+ @param[in] ExtHdrsLen The length of the extension headers.
+ @param[in] LastHeader The pointer of next header of last extension header.
+ @param[in] HeadLen The length of the unfragmented part of the IP6 header.
+
+ @retval EFI_BAD_BUFFER_SIZE There is no enought room in the head space of
+ Packet.
+ @retval EFI_SUCCESS The operation performed successfully.
+
+**/
+EFI_STATUS
+Ip6PrependHead (
+ IN IP6_SERVICE *IpSb,
+ IN NET_BUF *Packet,
+ IN EFI_IP6_HEADER *Head,
+ IN UINT16 FragmentOffset,
+ IN UINT8 *ExtHdrs,
+ IN UINT32 ExtHdrsLen,
+ IN UINT8 LastHeader,
+ IN UINT32 HeadLen
+ )
+{
+ UINT32 Len;
+ UINT32 UnFragExtHdrsLen;
+ EFI_IP6_HEADER *PacketHead;
+ UINT8 *UpdatedExtHdrs;
+ EFI_STATUS Status;
+ UINT8 NextHeader;
+
+ //
+ // HeadLen is the length of the fixed part of the sequences of fragments, i.e.
+ // the unfragment part.
+ //
+ PacketHead = (EFI_IP6_HEADER *) NetbufAllocSpace (Packet, HeadLen, NET_BUF_HEAD);
+ if (PacketHead == NULL) {
+ return EFI_BAD_BUFFER_SIZE;
+ }
+
+ //
+ // Set the head up, convert the host byte order to network byte order
+ //
+ CopyMem (PacketHead, Head, sizeof (EFI_IP6_HEADER));
+ PacketHead->PayloadLength = HTONS ((UINT16) (Packet->TotalSize - sizeof (EFI_IP6_HEADER)));
+ Packet->Ip.Ip6 = PacketHead;
+
+ Len = HeadLen - sizeof (EFI_IP6_HEADER);
+ UnFragExtHdrsLen = Len - sizeof (IP6_FRAGMENT_HEADER);
+
+ if (UnFragExtHdrsLen == 0) {
+ PacketHead->NextHeader = IP6_FRAGMENT;
+ }
+
+ //
+ // Append the extension headers: firstly copy the unfragmentable headers, then append
+ // fragmentation header.
+ //
+ if ((FragmentOffset & IP6_FRAGMENT_OFFSET_MASK) == 0) {
+ NextHeader = Head->NextHeader;
+ } else {
+ NextHeader = PacketHead->NextHeader;
+ }
+
+ Status = Ip6FillFragmentHeader (
+ IpSb,
+ NextHeader,
+ LastHeader,
+ ExtHdrs,
+ ExtHdrsLen,
+ FragmentOffset,
+ &UpdatedExtHdrs
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ CopyMem (
+ (UINT8 *) (PacketHead + 1),
+ UpdatedExtHdrs,
+ UnFragExtHdrsLen + sizeof (IP6_FRAGMENT_HEADER)
+ );
+
+ FreePool (UpdatedExtHdrs);
+ return EFI_SUCCESS;
+}
+
+/**
+ Transmit an IP6 packet. The packet comes either from the IP6
+ child's consumer (IpInstance != NULL) or the IP6 driver itself
+ (IpInstance == NULL). It will route the packet, fragment it,
+ then transmit all the fragments through an interface.
+
+ @param[in] IpSb The IP6 service instance to transmit the packet.
+ @param[in] Interface The IP6 interface to transmit the packet. Ignored
+ if NULL.
+ @param[in] IpInstance The IP6 child that issues the transmission. It is
+ NULL if the packet is from the system.
+ @param[in] Packet The user data to send, excluding the IP header.
+ @param[in] Head The caller supplied header. The caller should set
+ the following header fields: NextHeader, HopLimit,
+ Src, Dest, FlowLabel, PayloadLength. This function
+ will fill in the Ver, TrafficClass.
+ @param[in] ExtHdrs The extension headers to append to the IPv6 basic
+ header.
+ @param[in] ExtHdrsLen The length of the extension headers.
+ @param[in] Callback The callback function to issue when transmission
+ completed.
+ @param[in] Context The opaque context for the callback.
+
+ @retval EFI_INVALID_PARAMETER Any input parameter or the packet is invalid.
+ @retval EFI_NO_MAPPING There is no interface to the destination.
+ @retval EFI_NOT_FOUND There is no route to the destination.
+ @retval EFI_SUCCESS The packet successfully transmitted.
+ @retval EFI_OUT_OF_RESOURCES Failed to finish the operation due to lack of
+ resources.
+ @retval Others Failed to transmit the packet.
+
+**/
+EFI_STATUS
+Ip6Output (
+ IN IP6_SERVICE *IpSb,
+ IN IP6_INTERFACE *Interface OPTIONAL,
+ IN IP6_PROTOCOL *IpInstance OPTIONAL,
+ IN NET_BUF *Packet,
+ IN EFI_IP6_HEADER *Head,
+ IN UINT8 *ExtHdrs,
+ IN UINT32 ExtHdrsLen,
+ IN IP6_FRAME_CALLBACK Callback,
+ IN VOID *Context
+ )
+{
+ IP6_INTERFACE *IpIf;
+ EFI_IPv6_ADDRESS NextHop;
+ IP6_NEIGHBOR_ENTRY *NeighborCache;
+ IP6_ROUTE_CACHE_ENTRY *RouteCache;
+ EFI_STATUS Status;
+ UINT32 Mtu;
+ UINT32 HeadLen;
+ UINT16 FragmentOffset;
+ UINT8 *LastHeader;
+ UINT32 UnFragmentLen;
+ UINT32 UnFragmentHdrsLen;
+ UINT32 FragmentHdrsLen;
+ UINT16 *Checksum;
+ UINT16 PacketChecksum;
+ UINT16 PseudoChecksum;
+ UINT32 Index;
+ UINT32 PacketLen;
+ UINT32 RealExtLen;
+ UINT32 Offset;
+ NET_BUF *TmpPacket;
+ NET_BUF *Fragment;
+ UINT32 Num;
+ UINT8 *Buf;
+ EFI_IP6_HEADER *PacketHead;
+ IP6_ICMP_HEAD *IcmpHead;
+ IP6_TXTOKEN_WRAP *Wrap;
+ IP6_ROUTE_ENTRY *RouteEntry;
+ UINT8 *UpdatedExtHdrs;
+ UINT8 NextHeader;
+ UINT8 LastHeaderBackup;
+ BOOLEAN FragmentHeadInserted;
+ UINT8 *ExtHdrsBackup;
+ UINT8 NextHeaderBackup;
+ EFI_IPv6_ADDRESS Source;
+ EFI_IPv6_ADDRESS Destination;
+
+ NET_CHECK_SIGNATURE (IpSb, IP6_SERVICE_SIGNATURE);
+
+ //
+ // RFC2460: Each extension header is an integer multiple of 8 octets long,
+ // in order to retain 8-octet alignment for subsequent headers.
+ //
+ if ((ExtHdrsLen & 0x7) != 0) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ LastHeader = NULL;
+
+ Ip6IsExtsValid (
+ NULL,
+ NULL,
+ &Head->NextHeader,
+ ExtHdrs,
+ ExtHdrsLen,
+ FALSE,
+ NULL,
+ &LastHeader,
+ NULL,
+ NULL,
+ NULL
+ );
+
+ //
+ // Select an interface/source for system packet, application
+ // should select them itself.
+ //
+ IpIf = Interface;
+ if (IpIf == NULL) {
+ //
+ // IpInstance->Interface is NULL when IpInstance is configured with both stationaddress
+ // and destinationaddress is unspecified.
+ //
+ if (IpInstance == NULL || IpInstance->Interface == NULL) {
+ IpIf = Ip6SelectInterface (IpSb, &Head->DestinationAddress, &Head->SourceAddress);
+ if (IpInstance != NULL) {
+ IpInstance->Interface = IpIf;
+ }
+ } else {
+ IpIf = IpInstance->Interface;
+ }
+ }
+
+ if (IpIf == NULL) {
+ return EFI_NO_MAPPING;
+ }
+
+ //
+ // Update the common field in Head here.
+ //
+ Head->Version = 6;
+ Head->TrafficClassL = 0;
+ Head->TrafficClassH = 0;
+
+ Checksum = NULL;
+ NextHeader = *LastHeader;
+
+ switch (NextHeader) {
+ case EFI_IP_PROTO_UDP:
+ Packet->Udp = (EFI_UDP_HEADER *) NetbufGetByte (Packet, 0, NULL);
+ ASSERT (Packet->Udp != NULL);
+ if (Packet->Udp->Checksum == 0) {
+ Checksum = &Packet->Udp->Checksum;
+ }
+ break;
+
+ case EFI_IP_PROTO_TCP:
+ Packet->Tcp = (TCP_HEAD *) NetbufGetByte (Packet, 0, NULL);
+ ASSERT (Packet->Tcp != NULL);
+ if (Packet->Tcp->Checksum == 0) {
+ Checksum = &Packet->Tcp->Checksum;
+ }
+ break;
+
+ case IP6_ICMP:
+ //
+ // Don't send ICMP packet to an IPv6 anycast address.
+ //
+ if (Ip6IsAnycast (IpSb, &Head->DestinationAddress)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ IcmpHead = (IP6_ICMP_HEAD *) NetbufGetByte (Packet, 0, NULL);
+ ASSERT (IcmpHead != NULL);
+ if (IcmpHead->Checksum == 0) {
+ Checksum = &IcmpHead->Checksum;
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ if (Checksum != NULL) {
+ //
+ // Calculate the checksum for upper layer protocol if it is not calculated due to lack of
+ // IPv6 source address.
+ //
+ PacketChecksum = NetbufChecksum (Packet);
+ PseudoChecksum = NetIp6PseudoHeadChecksum (
+ &Head->SourceAddress,
+ &Head->DestinationAddress,
+ NextHeader,
+ Packet->TotalSize
+ );
+ *Checksum = (UINT16) ~NetAddChecksum (PacketChecksum, PseudoChecksum);
+ }
+
+ Status = Ip6IpSecProcessPacket (
+ IpSb,
+ Head,
+ LastHeader, // no need get the lasthead value for output
+ &Packet,
+ ExtHdrs,
+ ExtHdrsLen,
+ EfiIPsecOutBound,
+ Context
+ );
+
+ if (EFI_ERROR(Status)) {
+ return Status;
+ }
+
+ LastHeader = NULL;
+ //
+ // Check incoming parameters.
+ //
+ if (!Ip6IsExtsValid (
+ IpSb,
+ Packet,
+ &Head->NextHeader,
+ ExtHdrs,
+ ExtHdrsLen,
+ FALSE,
+ NULL,
+ &LastHeader,
+ &RealExtLen,
+ &UnFragmentHdrsLen,
+ NULL
+ )) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if ((RealExtLen & 0x7) != 0) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ LastHeaderBackup = *LastHeader;
+
+ //
+ // Perform next hop determination:
+ // For multicast packets, the next-hop is always the destination address and
+ // is considered to be on-link.
+ //
+ if (IP6_IS_MULTICAST (&Head->DestinationAddress)) {
+ IP6_COPY_ADDRESS (&NextHop, &Head->DestinationAddress);
+ } else {
+ //
+ // For unicast packets, use a combination of the Destination Cache, the Prefix List
+ // and the Default Router List to determine the IP address of the appropriate next hop.
+ //
+ RouteCache = Ip6Route (IpSb, &Head->DestinationAddress, &Head->SourceAddress);
+ if (RouteCache == NULL) {
+ return EFI_NOT_FOUND;
+ }
+
+ IP6_COPY_ADDRESS (&NextHop, &RouteCache->NextHop);
+ Ip6FreeRouteCacheEntry (RouteCache);
+ }
+
+ //
+ // Examines the Neighbor Cache for link-layer information about that neighbor.
+ // DO NOT create neighbor cache if neighbor is itself - when reporting ICMP error.
+ //
+ if (!IP6_IS_MULTICAST (&NextHop) && !EFI_IP6_EQUAL (&Head->DestinationAddress, &Head->SourceAddress)) {
+ NeighborCache = Ip6FindNeighborEntry (IpSb, &NextHop);
+ if (NeighborCache == NULL) {
+ NeighborCache = Ip6CreateNeighborEntry (IpSb, Ip6OnArpResolved, &NextHop, NULL);
+
+ if (NeighborCache == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ //
+ // Send out multicast neighbor solicitation for address resolution immediatly.
+ //
+ Ip6CreateSNMulticastAddr (&NeighborCache->Neighbor, &Destination);
+ Status = Ip6SelectSourceAddress (IpSb, &NeighborCache->Neighbor, &Source);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = Ip6SendNeighborSolicit (
+ IpSb,
+ &Source,
+ &Destination,
+ &NeighborCache->Neighbor,
+ &IpSb->SnpMode.CurrentAddress
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ --NeighborCache->Transmit;
+ NeighborCache->Ticks = IP6_GET_TICKS (IpSb->RetransTimer) + 1;
+ }
+
+ NeighborCache->Interface = IpIf;
+ }
+
+ UpdatedExtHdrs = NULL;
+ ExtHdrsBackup = NULL;
+ NextHeaderBackup = 0;
+ FragmentHeadInserted = FALSE;
+
+ //
+ // Check whether we received Packet Too Big message for the packet sent to the
+ // Destination. If yes include a Fragment Header in the subsequent packets.
+ //
+ RouteEntry = Ip6FindRouteEntry (
+ IpSb->RouteTable,
+ &Head->DestinationAddress,
+ NULL
+ );
+ if (RouteEntry != NULL) {
+ if ((RouteEntry->Flag & IP6_PACKET_TOO_BIG) == IP6_PACKET_TOO_BIG) {
+
+ //
+ // FragmentHead is inserted after Hop-by-Hop Options header, Destination
+ // Options header (first occur), Routing header, and before Fragment header,
+ // Authentication header, Encapsulating Security Payload header, and
+ // Destination Options header (last occur), and upper-layer header.
+ //
+ Status = Ip6FillFragmentHeader (
+ IpSb,
+ Head->NextHeader,
+ LastHeaderBackup,
+ ExtHdrs,
+ ExtHdrsLen,
+ 0,
+ &UpdatedExtHdrs
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ if ((ExtHdrs == NULL) && (ExtHdrsLen == 0)) {
+ NextHeaderBackup = Head->NextHeader;
+ Head->NextHeader = IP6_FRAGMENT;
+ }
+
+ ExtHdrsBackup = ExtHdrs;
+ ExtHdrs = UpdatedExtHdrs;
+ ExtHdrsLen = ExtHdrsLen + sizeof (IP6_FRAGMENT_HEADER);
+ RealExtLen = RealExtLen + sizeof (IP6_FRAGMENT_HEADER);
+
+ mIp6Id++;
+
+ FragmentHeadInserted = TRUE;
+ }
+
+ Ip6FreeRouteEntry (RouteEntry);
+ }
+
+ //
+ // OK, selected the source and route, fragment the packet then send
+ // them. Tag each fragment other than the first one as spawn from it.
+ // Each extension header is an integar multiple of 8 octets long, in
+ // order to retain 8-octet alignment for subsequent headers.
+ //
+ Mtu = IpSb->MaxPacketSize + sizeof (EFI_IP6_HEADER);
+ HeadLen = sizeof (EFI_IP6_HEADER) + RealExtLen;
+
+ if (Packet->TotalSize + HeadLen > Mtu) {
+ //
+ // Remove the inserted Fragment Header since we need fragment the packet.
+ //
+ if (FragmentHeadInserted) {
+ ExtHdrs = ExtHdrsBackup;
+ ExtHdrsLen = ExtHdrsLen - sizeof (IP6_FRAGMENT_HEADER);
+
+ if ((ExtHdrs == NULL) && (ExtHdrsLen == 0)) {
+ Head->NextHeader = NextHeaderBackup;
+ }
+ }
+
+ FragmentHdrsLen = ExtHdrsLen - UnFragmentHdrsLen;
+
+ //
+ // The packet is beyond the maximum which can be described through the
+ // fragment offset field in Fragment header.
+ //
+ if ((((Packet->TotalSize + FragmentHdrsLen) >> 3) & (~0x1fff)) != 0) {
+ Status = EFI_BAD_BUFFER_SIZE;
+ goto Error;
+ }
+
+ if (FragmentHdrsLen != 0) {
+ //
+ // Append the fragmentable extension hdrs before the upper layer payload
+ // to form a new NET_BUF. This NET_BUF contains all the buffer which will
+ // be fragmented below.
+ //
+ TmpPacket = NetbufGetFragment (Packet, 0, Packet->TotalSize, FragmentHdrsLen);
+ ASSERT (TmpPacket != NULL);
+
+ //
+ // Allocate the space to contain the fragmentable hdrs and copy the data.
+ //
+ Buf = NetbufAllocSpace (TmpPacket, FragmentHdrsLen, TRUE);
+ ASSERT (Buf != NULL);
+ CopyMem (Buf, ExtHdrs + UnFragmentHdrsLen, FragmentHdrsLen);
+
+ //
+ // Free the old Packet.
+ //
+ NetbufFree (Packet);
+ Packet = TmpPacket;
+ }
+
+ //
+ // The unfragment part which appears in every fragmented IPv6 packet includes
+ // the IPv6 header, the unfragmentable extension hdrs and the fragment header.
+ //
+ UnFragmentLen = sizeof (EFI_IP6_HEADER) + UnFragmentHdrsLen + sizeof (IP6_FRAGMENT_HEADER);
+
+ //
+ // Mtu now is the length of the fragment part in a full-length fragment.
+ //
+ Mtu = (Mtu - UnFragmentLen) & (~0x07);
+ Num = (Packet->TotalSize + Mtu - 1) / Mtu;
+
+ for (Index = 0, Offset = 0, PacketLen = Mtu; Index < Num; Index++) {
+ //
+ // Get fragment from the Packet, append UnFragnmentLen spare buffer
+ // before the fragmented data, the corresponding data is filled in later.
+ //
+ Fragment = NetbufGetFragment (Packet, Offset, PacketLen, UnFragmentLen);
+ if (Fragment == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto Error;
+ }
+
+ FragmentOffset = (UINT16) ((UINT16) Offset | 0x1);
+ if (Index == Num - 1){
+ //
+ // The last fragment, clear the M flag.
+ //
+ FragmentOffset &= (~0x1);
+ }
+
+ Status = Ip6PrependHead (
+ IpSb,
+ Fragment,
+ Head,
+ FragmentOffset,
+ ExtHdrs,
+ ExtHdrsLen,
+ LastHeaderBackup,
+ UnFragmentLen
+ );
+ ASSERT (Status == EFI_SUCCESS);
+
+ Status = Ip6SendFrame (
+ IpIf,
+ IpInstance,
+ Fragment,
+ &NextHop,
+ Ip6SysPacketSent,
+ Packet
+ );
+ if (EFI_ERROR (Status)) {
+ goto Error;
+ }
+
+ //
+ // The last fragment of upper layer packet, update the IP6 token status.
+ //
+ if ((Index == Num -1) && (Context != NULL)) {
+ Wrap = (IP6_TXTOKEN_WRAP *) Context;
+ Wrap->Token->Status = Status;
+ }
+
+ Offset += PacketLen;
+ PacketLen = Packet->TotalSize - Offset;
+ if (PacketLen > Mtu) {
+ PacketLen = Mtu;
+ }
+ }
+
+ NetbufFree (Packet);
+ mIp6Id++;
+
+ if (UpdatedExtHdrs != NULL) {
+ FreePool (UpdatedExtHdrs);
+ }
+
+ return EFI_SUCCESS;
+ }
+
+ //
+ // Need not fragment the packet, send it in one frame.
+ //
+ PacketHead = (EFI_IP6_HEADER *) NetbufAllocSpace (Packet, HeadLen, NET_BUF_HEAD);
+ if (PacketHead == NULL) {
+ Status = EFI_BAD_BUFFER_SIZE;
+ goto Error;
+ }
+
+ CopyMem (PacketHead, Head, sizeof (EFI_IP6_HEADER));
+ Packet->Ip.Ip6 = PacketHead;
+
+ if (ExtHdrs != NULL) {
+ Buf = (UINT8 *) (PacketHead + 1);
+ CopyMem (Buf, ExtHdrs, ExtHdrsLen);
+ }
+
+ if (UpdatedExtHdrs != NULL) {
+ //
+ // A Fragment Header is inserted to the packet, update the payload length.
+ //
+ PacketHead->PayloadLength = (UINT16) (NTOHS (PacketHead->PayloadLength) +
+ sizeof (IP6_FRAGMENT_HEADER));
+ PacketHead->PayloadLength = HTONS (PacketHead->PayloadLength);
+ FreePool (UpdatedExtHdrs);
+ }
+
+ return Ip6SendFrame (
+ IpIf,
+ IpInstance,
+ Packet,
+ &NextHop,
+ Callback,
+ Context
+ );
+
+Error:
+ if (UpdatedExtHdrs != NULL) {
+ FreePool (UpdatedExtHdrs);
+ }
+ Ip6CancelPacket (IpIf, Packet, Status);
+ return Status;
+}
+
+/**
+ The filter function to find a packet and all its fragments.
+ The packet's fragments have their Context set to the packet.
+
+ @param[in] Frame The frames hold by the low level interface.
+ @param[in] Context Context to the function, which is the packet.
+
+ @retval TRUE This is the packet to cancel or its fragments.
+ @retval FALSE This is an unrelated packet.
+
+**/
+BOOLEAN
+Ip6CancelPacketFragments (
+ IN IP6_LINK_TX_TOKEN *Frame,
+ IN VOID *Context
+ )
+{
+ if ((Frame->Packet == (NET_BUF *) Context) || (Frame->Context == Context)) {
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+/**
+ Remove all the frames on the interface that pass the FrameToCancel,
+ either queued on ARP queues or that have already been delivered to
+ MNP and not yet recycled.
+
+ @param[in] Interface Interface to remove the frames from.
+ @param[in] IoStatus The transmit status returned to the frames' callback.
+ @param[in] FrameToCancel Function to select the frame to cancel; NULL to select all.
+ @param[in] Context Opaque parameters passed to FrameToCancel. Ignored if
+ FrameToCancel is NULL.
+
+**/
+VOID
+Ip6CancelFrames (
+ IN IP6_INTERFACE *Interface,
+ IN EFI_STATUS IoStatus,
+ IN IP6_FRAME_TO_CANCEL FrameToCancel OPTIONAL,
+ IN VOID *Context OPTIONAL
+ )
+{
+ LIST_ENTRY *Entry;
+ LIST_ENTRY *Next;
+ IP6_LINK_TX_TOKEN *Token;
+ IP6_SERVICE *IpSb;
+ IP6_NEIGHBOR_ENTRY *ArpQue;
+ EFI_STATUS Status;
+
+ IpSb = Interface->Service;
+ NET_CHECK_SIGNATURE (IpSb, IP6_SERVICE_SIGNATURE);
+
+ //
+ // Cancel all the pending frames on ARP requests
+ //
+ NET_LIST_FOR_EACH_SAFE (Entry, Next, &Interface->ArpQues) {
+ ArpQue = NET_LIST_USER_STRUCT (Entry, IP6_NEIGHBOR_ENTRY, ArpList);
+
+ Status = Ip6FreeNeighborEntry (
+ IpSb,
+ ArpQue,
+ FALSE,
+ FALSE,
+ IoStatus,
+ FrameToCancel,
+ Context
+ );
+ ASSERT_EFI_ERROR (Status);
+ }
+
+ //
+ // Cancel all the frames that have been delivered to MNP
+ // but not yet recycled.
+ //
+ NET_LIST_FOR_EACH_SAFE (Entry, Next, &Interface->SentFrames) {
+ Token = NET_LIST_USER_STRUCT (Entry, IP6_LINK_TX_TOKEN, Link);
+
+ if ((FrameToCancel == NULL) || FrameToCancel (Token, Context)) {
+ IpSb->Mnp->Cancel (IpSb->Mnp, &Token->MnpToken);
+ }
+ }
+}
+
+/**
+ Cancel the Packet and all its fragments.
+
+ @param[in] IpIf The interface from which the Packet is sent.
+ @param[in] Packet The Packet to cancel.
+ @param[in] IoStatus The status returns to the sender.
+
+**/
+VOID
+Ip6CancelPacket (
+ IN IP6_INTERFACE *IpIf,
+ IN NET_BUF *Packet,
+ IN EFI_STATUS IoStatus
+ )
+{
+ Ip6CancelFrames (IpIf, IoStatus, Ip6CancelPacketFragments, Packet);
+}
+
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