diff options
Diffstat (limited to 'NetworkPkg/Ip6Dxe/Ip6Input.h')
| -rw-r--r-- | NetworkPkg/Ip6Dxe/Ip6Input.h | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/NetworkPkg/Ip6Dxe/Ip6Input.h b/NetworkPkg/Ip6Dxe/Ip6Input.h new file mode 100644 index 000000000..859489652 --- /dev/null +++ b/NetworkPkg/Ip6Dxe/Ip6Input.h @@ -0,0 +1,235 @@ +/** @file
+ IP6 internal functions and definitions to process the incoming packets.
+
+ 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.
+
+**/
+
+#ifndef __EFI_IP6_INPUT_H__
+#define __EFI_IP6_INPUT_H__
+
+#define IP6_MIN_HEADLEN 40
+#define IP6_MAX_HEADLEN 120
+///
+/// 8(ESP header) + 16(max IV) + 16(max padding) + 2(ESP tail) + 12(max ICV) = 54
+///
+#define IP6_MAX_IPSEC_HEADLEN 54
+
+
+#define IP6_ASSEMLE_HASH_SIZE 127
+///
+/// Lift time in seconds.
+///
+#define IP6_FRAGMENT_LIFE 60
+#define IP6_MAX_PACKET_SIZE 65535
+
+
+#define IP6_GET_CLIP_INFO(Packet) ((IP6_CLIP_INFO *) ((Packet)->ProtoData))
+
+#define IP6_ASSEMBLE_HASH(Dst, Src, Id) \
+ ((*((UINT32 *) (Dst)) + *((UINT32 *) (Src)) + (Id)) % IP6_ASSEMLE_HASH_SIZE)
+
+#define IP6_RXDATA_WRAP_SIZE(NumFrag) \
+ (sizeof (IP6_RXDATA_WRAP) + sizeof (EFI_IP6_FRAGMENT_DATA) * ((NumFrag) - 1))
+
+//
+// Per packet information for input process. LinkFlag specifies whether
+// the packet is received as Link layer unicast, multicast or broadcast.
+// The CastType is the IP layer cast type, such as IP multicast or unicast.
+// Start, End and Length are staffs used to assemble the packets. Start
+// is the sequence number of the first byte of data in the packet. Length
+// is the number of bytes of data. End = Start + Length, that is, the
+// sequence number of last byte + 1. Each assembled packet has a count down
+// life. If it isn't consumed before Life reaches zero, the packet is released.
+//
+typedef struct {
+ UINT32 LinkFlag;
+ INT32 CastType;
+ INT32 Start;
+ INT32 End;
+ INT32 Length;
+ UINT32 Life;
+ EFI_STATUS Status;
+ UINT32 Id;
+ UINT16 HeadLen;
+ UINT8 NextHeader;
+ UINT8 LastFrag;
+ UINT32 FormerNextHeader;
+} IP6_CLIP_INFO;
+
+//
+// Structure used to assemble IP packets.
+//
+typedef struct {
+ LIST_ENTRY Link;
+ LIST_ENTRY Fragments; // List of all the fragments of this packet
+
+ //
+ // Identity of one IP6 packet. Each fragment of a packet has
+ // the same (Dst, Src, Id).
+ //
+ EFI_IPv6_ADDRESS Dst;
+ EFI_IPv6_ADDRESS Src;
+ UINT32 Id;
+
+ UINT32 TotalLen;
+ UINT32 CurLen;
+ UINT32 Life; // Count down life for the packet.
+
+ EFI_IP6_HEADER *Head; // IP head of the first fragment
+ IP6_CLIP_INFO *Info; // Per packet information of the first fragment
+ NET_BUF *Packet; // The first fragment of the packet
+} IP6_ASSEMBLE_ENTRY;
+
+//
+// Each Ip service instance has an assemble table to reassemble
+// the packets before delivery to its children. It is organized
+// as hash table.
+//
+typedef struct {
+ LIST_ENTRY Bucket[IP6_ASSEMLE_HASH_SIZE];
+} IP6_ASSEMBLE_TABLE;
+
+/**
+ The IP6 input routine. It is called by the IP6_INTERFACE when an
+ IP6 fragment is received from MNP.
+
+ @param[in] Packet The IP6 packet received.
+ @param[in] IoStatus The return status of receive request.
+ @param[in] Flag The link layer flag for the packet received, such
+ as multicast.
+ @param[in] Context The IP6 service instance that own the MNP.
+
+**/
+VOID
+Ip6AcceptFrame (
+ IN NET_BUF *Packet,
+ IN EFI_STATUS IoStatus,
+ IN UINT32 Flag,
+ IN VOID *Context
+ );
+
+/**
+ Deliver the received packets to upper layer if there are both received
+ requests and enqueued packets. If the enqueued packet is shared, it will
+ duplicate it to a non-shared packet, release the shared packet, then
+ deliver the non-shared packet up.
+
+ @param[in] IpInstance The IP child to deliver the packet up.
+
+ @retval EFI_OUT_OF_RESOURCES Failed to allocate resources to deliver the
+ packets.
+ @retval EFI_SUCCESS All the enqueued packets that can be delivered
+ are delivered up.
+
+**/
+EFI_STATUS
+Ip6InstanceDeliverPacket (
+ IN IP6_PROTOCOL *IpInstance
+ );
+
+/**
+ The work function to locate IPsec protocol to process the inbound or
+ outbound IP packets. The process routine handls the packet with the following
+ actions: bypass the packet, discard the packet, or protect the packet.
+
+ @param[in] IpSb The IP6 service instance.
+ @param[in] Head The caller supplied IP6 header.
+ @param[in, out] LastHead The next header field of last IP header.
+ @param[in, out] Netbuf The IP6 packet to be processed by IPsec.
+ @param[in] ExtHdrs The caller supplied options.
+ @param[in] ExtHdrsLen The length of the option.
+ @param[in] Direction The directionality in an SPD entry,
+ EfiIPsecInBound or EfiIPsecOutBound.
+ @param[in] Context The token's wrap.
+
+ @retval EFI_SUCCESS The IPsec protocol is not available or disabled.
+ @retval EFI_SUCCESS The packet was bypassed and all buffers remain the same.
+ @retval EFI_SUCCESS The packet was protected.
+ @retval EFI_ACCESS_DENIED The packet was discarded.
+ @retval EFI_OUT_OF_RESOURCES There are not suffcient resources to complete the operation.
+ @retval EFI_BUFFER_TOO_SMALL The number of non-empty block is bigger than the
+ number of input data blocks when building a fragment table.
+
+**/
+EFI_STATUS
+Ip6IpSecProcessPacket (
+ IN IP6_SERVICE *IpSb,
+ IN EFI_IP6_HEADER *Head,
+ IN OUT UINT8 *LastHead,
+ IN OUT NET_BUF **Netbuf,
+ IN VOID *ExtHdrs,
+ IN UINT32 ExtHdrsLen,
+ IN EFI_IPSEC_TRAFFIC_DIR Direction,
+ IN VOID *Context
+ );
+
+/**
+ Initialize an already allocated assemble table. This is generally
+ the assemble table embedded in the IP6 service instance.
+
+ @param[in, out] Table The assemble table to initialize.
+
+**/
+VOID
+Ip6CreateAssembleTable (
+ IN OUT IP6_ASSEMBLE_TABLE *Table
+ );
+
+/**
+ Clean up the assemble table: remove all the fragments
+ and assemble entries.
+
+ @param[in, out] Table The assemble table to clean up.
+
+**/
+VOID
+Ip6CleanAssembleTable (
+ IN OUT IP6_ASSEMBLE_TABLE *Table
+ );
+
+/**
+ Demultiple the packet. the packet delivery is processed in two
+ passes. The first pass will enque a shared copy of the packet
+ to each IP6 child that accepts the packet. The second pass will
+ deliver a non-shared copy of the packet to each IP6 child that
+ has pending receive requests. Data is copied if more than one
+ child wants to consume the packet bacause each IP child need
+ its own copy of the packet to make changes.
+
+ @param[in] IpSb The IP6 service instance that received the packet.
+ @param[in] Head The header of the received packet.
+ @param[in] Packet The data of the received packet.
+
+ @retval EFI_NOT_FOUND No IP child accepts the packet.
+ @retval EFI_SUCCESS The packet is enqueued or delivered to some IP
+ children.
+
+**/
+EFI_STATUS
+Ip6Demultiplex (
+ IN IP6_SERVICE *IpSb,
+ IN EFI_IP6_HEADER *Head,
+ IN NET_BUF *Packet
+ );
+
+/**
+ Timeout the fragmented, enqueued, and transmitted packets.
+
+ @param[in] IpSb The IP6 service instance to timeout.
+
+**/
+VOID
+Ip6PacketTimerTicking (
+ IN IP6_SERVICE *IpSb
+ );
+
+#endif
|