+++ /dev/null
-/** @file\r
- IP4 input process.\r
-\r
-Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>\r
-(C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>\r
-\r
-SPDX-License-Identifier: BSD-2-Clause-Patent\r
-\r
-**/\r
-\r
-#include "Ip4Impl.h"\r
-\r
-\r
-/**\r
- Create an empty assemble entry for the packet identified by\r
- (Dst, Src, Id, Protocol). The default life for the packet is\r
- 120 seconds.\r
-\r
- @param[in] Dst The destination address\r
- @param[in] Src The source address\r
- @param[in] Id The ID field in IP header\r
- @param[in] Protocol The protocol field in IP header\r
-\r
- @return NULL if failed to allocate memory for the entry, otherwise\r
- the point to just created reassemble entry.\r
-\r
-**/\r
-IP4_ASSEMBLE_ENTRY *\r
-Ip4CreateAssembleEntry (\r
- IN IP4_ADDR Dst,\r
- IN IP4_ADDR Src,\r
- IN UINT16 Id,\r
- IN UINT8 Protocol\r
- )\r
-{\r
-\r
- IP4_ASSEMBLE_ENTRY *Assemble;\r
-\r
- Assemble = AllocatePool (sizeof (IP4_ASSEMBLE_ENTRY));\r
-\r
- if (Assemble == NULL) {\r
- return NULL;\r
- }\r
-\r
- InitializeListHead (&Assemble->Link);\r
- InitializeListHead (&Assemble->Fragments);\r
-\r
- Assemble->Dst = Dst;\r
- Assemble->Src = Src;\r
- Assemble->Id = Id;\r
- Assemble->Protocol = Protocol;\r
- Assemble->TotalLen = 0;\r
- Assemble->CurLen = 0;\r
- Assemble->Head = NULL;\r
- Assemble->Info = NULL;\r
- Assemble->Life = IP4_FRAGMENT_LIFE;\r
-\r
- return Assemble;\r
-}\r
-\r
-\r
-/**\r
- Release all the fragments of a packet, then free the assemble entry.\r
-\r
- @param[in] Assemble The assemble entry to free\r
-\r
-**/\r
-VOID\r
-Ip4FreeAssembleEntry (\r
- IN IP4_ASSEMBLE_ENTRY *Assemble\r
- )\r
-{\r
- LIST_ENTRY *Entry;\r
- LIST_ENTRY *Next;\r
- NET_BUF *Fragment;\r
-\r
- NET_LIST_FOR_EACH_SAFE (Entry, Next, &Assemble->Fragments) {\r
- Fragment = NET_LIST_USER_STRUCT (Entry, NET_BUF, List);\r
-\r
- RemoveEntryList (Entry);\r
- NetbufFree (Fragment);\r
- }\r
-\r
- FreePool (Assemble);\r
-}\r
-\r
-\r
-/**\r
- Initialize an already allocated assemble table. This is generally\r
- the assemble table embedded in the IP4 service instance.\r
-\r
- @param[in, out] Table The assemble table to initialize.\r
-\r
-**/\r
-VOID\r
-Ip4InitAssembleTable (\r
- IN OUT IP4_ASSEMBLE_TABLE *Table\r
- )\r
-{\r
- UINT32 Index;\r
-\r
- for (Index = 0; Index < IP4_ASSEMLE_HASH_SIZE; Index++) {\r
- InitializeListHead (&Table->Bucket[Index]);\r
- }\r
-}\r
-\r
-\r
-/**\r
- Clean up the assemble table: remove all the fragments\r
- and assemble entries.\r
-\r
- @param[in] Table The assemble table to clean up\r
-\r
-**/\r
-VOID\r
-Ip4CleanAssembleTable (\r
- IN IP4_ASSEMBLE_TABLE *Table\r
- )\r
-{\r
- LIST_ENTRY *Entry;\r
- LIST_ENTRY *Next;\r
- IP4_ASSEMBLE_ENTRY *Assemble;\r
- UINT32 Index;\r
-\r
- for (Index = 0; Index < IP4_ASSEMLE_HASH_SIZE; Index++) {\r
- NET_LIST_FOR_EACH_SAFE (Entry, Next, &Table->Bucket[Index]) {\r
- Assemble = NET_LIST_USER_STRUCT (Entry, IP4_ASSEMBLE_ENTRY, Link);\r
-\r
- RemoveEntryList (Entry);\r
- Ip4FreeAssembleEntry (Assemble);\r
- }\r
- }\r
-}\r
-\r
-\r
-/**\r
- Trim the packet to fit in [Start, End), and update the per\r
- packet information.\r
-\r
- @param Packet Packet to trim\r
- @param Start The sequence of the first byte to fit in\r
- @param End One beyond the sequence of last byte to fit in.\r
-\r
-**/\r
-VOID\r
-Ip4TrimPacket (\r
- IN OUT NET_BUF *Packet,\r
- IN INTN Start,\r
- IN INTN End\r
- )\r
-{\r
- IP4_CLIP_INFO *Info;\r
- INTN Len;\r
-\r
- Info = IP4_GET_CLIP_INFO (Packet);\r
-\r
- ASSERT (Info->Start + Info->Length == Info->End);\r
- ASSERT ((Info->Start < End) && (Start < Info->End));\r
-\r
- if (Info->Start < Start) {\r
- Len = Start - Info->Start;\r
-\r
- NetbufTrim (Packet, (UINT32) Len, NET_BUF_HEAD);\r
- Info->Start = Start;\r
- Info->Length -= Len;\r
- }\r
-\r
- if (End < Info->End) {\r
- Len = End - Info->End;\r
-\r
- NetbufTrim (Packet, (UINT32) Len, NET_BUF_TAIL);\r
- Info->End = End;\r
- Info->Length -= Len;\r
- }\r
-}\r
-\r
-\r
-/**\r
- Release all the fragments of the packet. This is the callback for\r
- the assembled packet's OnFree. It will free the assemble entry,\r
- which in turn will free all the fragments of the packet.\r
-\r
- @param[in] Arg The assemble entry to free\r
-\r
-**/\r
-VOID\r
-EFIAPI\r
-Ip4OnFreeFragments (\r
- IN VOID *Arg\r
- )\r
-{\r
- Ip4FreeAssembleEntry ((IP4_ASSEMBLE_ENTRY *) Arg);\r
-}\r
-\r
-\r
-/**\r
- Reassemble the IP fragments. If all the fragments of the packet\r
- have been received, it will wrap the packet in a net buffer then\r
- return it to caller. If the packet can't be assembled, NULL is\r
- return.\r
-\r
- @param Table The assemble table used. New assemble entry will be created\r
- if the Packet is from a new chain of fragments.\r
- @param Packet The fragment to assemble. It might be freed if the fragment\r
- can't be re-assembled.\r
-\r
- @return NULL if the packet can't be reassemble. The point to just assembled\r
- packet if all the fragments of the packet have arrived.\r
-\r
-**/\r
-NET_BUF *\r
-Ip4Reassemble (\r
- IN OUT IP4_ASSEMBLE_TABLE *Table,\r
- IN OUT NET_BUF *Packet\r
- )\r
-{\r
- IP4_HEAD *IpHead;\r
- IP4_CLIP_INFO *This;\r
- IP4_CLIP_INFO *Node;\r
- IP4_ASSEMBLE_ENTRY *Assemble;\r
- LIST_ENTRY *Head;\r
- LIST_ENTRY *Prev;\r
- LIST_ENTRY *Cur;\r
- NET_BUF *Fragment;\r
- NET_BUF *NewPacket;\r
- INTN Index;\r
-\r
- IpHead = Packet->Ip.Ip4;\r
- This = IP4_GET_CLIP_INFO (Packet);\r
-\r
- ASSERT (IpHead != NULL);\r
-\r
- //\r
- // First: find the related assemble entry\r
- //\r
- Assemble = NULL;\r
- Index = IP4_ASSEMBLE_HASH (IpHead->Dst, IpHead->Src, IpHead->Id, IpHead->Protocol);\r
-\r
- NET_LIST_FOR_EACH (Cur, &Table->Bucket[Index]) {\r
- Assemble = NET_LIST_USER_STRUCT (Cur, IP4_ASSEMBLE_ENTRY, Link);\r
-\r
- if ((Assemble->Dst == IpHead->Dst) && (Assemble->Src == IpHead->Src) &&\r
- (Assemble->Id == IpHead->Id) && (Assemble->Protocol == IpHead->Protocol)) {\r
- break;\r
- }\r
- }\r
-\r
- //\r
- // Create a new assemble entry if no assemble entry is related to this packet\r
- //\r
- if (Cur == &Table->Bucket[Index]) {\r
- Assemble = Ip4CreateAssembleEntry (\r
- IpHead->Dst,\r
- IpHead->Src,\r
- IpHead->Id,\r
- IpHead->Protocol\r
- );\r
-\r
- if (Assemble == NULL) {\r
- goto DROP;\r
- }\r
-\r
- InsertHeadList (&Table->Bucket[Index], &Assemble->Link);\r
- }\r
- //\r
- // Assemble shouldn't be NULL here\r
- //\r
- ASSERT (Assemble != NULL);\r
-\r
- //\r
- // Find the point to insert the packet: before the first\r
- // fragment with THIS.Start < CUR.Start. the previous one\r
- // has PREV.Start <= THIS.Start < CUR.Start.\r
- //\r
- Head = &Assemble->Fragments;\r
-\r
- NET_LIST_FOR_EACH (Cur, Head) {\r
- Fragment = NET_LIST_USER_STRUCT (Cur, NET_BUF, List);\r
-\r
- if (This->Start < IP4_GET_CLIP_INFO (Fragment)->Start) {\r
- break;\r
- }\r
- }\r
-\r
- //\r
- // Check whether the current fragment overlaps with the previous one.\r
- // It holds that: PREV.Start <= THIS.Start < THIS.End. Only need to\r
- // check whether THIS.Start < PREV.End for overlap. If two fragments\r
- // overlaps, trim the overlapped part off THIS fragment.\r
- //\r
- if ((Prev = Cur->BackLink) != Head) {\r
- Fragment = NET_LIST_USER_STRUCT (Prev, NET_BUF, List);\r
- Node = IP4_GET_CLIP_INFO (Fragment);\r
-\r
- if (This->Start < Node->End) {\r
- if (This->End <= Node->End) {\r
- NetbufFree (Packet);\r
- return NULL;\r
- }\r
-\r
- Ip4TrimPacket (Packet, Node->End, This->End);\r
- }\r
- }\r
-\r
- //\r
- // Insert the fragment into the packet. The fragment may be removed\r
- // from the list by the following checks.\r
- //\r
- NetListInsertBefore (Cur, &Packet->List);\r
-\r
- //\r
- // Check the packets after the insert point. It holds that:\r
- // THIS.Start <= NODE.Start < NODE.End. The equality holds\r
- // if PREV and NEXT are continuous. THIS fragment may fill\r
- // several holes. Remove the completely overlapped fragments\r
- //\r
- while (Cur != Head) {\r
- Fragment = NET_LIST_USER_STRUCT (Cur, NET_BUF, List);\r
- Node = IP4_GET_CLIP_INFO (Fragment);\r
-\r
- //\r
- // Remove fragments completely overlapped by this fragment\r
- //\r
- if (Node->End <= This->End) {\r
- Cur = Cur->ForwardLink;\r
-\r
- RemoveEntryList (&Fragment->List);\r
- Assemble->CurLen -= Node->Length;\r
-\r
- NetbufFree (Fragment);\r
- continue;\r
- }\r
-\r
- //\r
- // The conditions are: THIS.Start <= NODE.Start, and THIS.End <\r
- // NODE.End. Two fragments overlaps if NODE.Start < THIS.End.\r
- // If two fragments start at the same offset, remove THIS fragment\r
- // because ((THIS.Start == NODE.Start) && (THIS.End < NODE.End)).\r
- //\r
- if (Node->Start < This->End) {\r
- if (This->Start == Node->Start) {\r
- RemoveEntryList (&Packet->List);\r
- goto DROP;\r
- }\r
-\r
- Ip4TrimPacket (Packet, This->Start, Node->Start);\r
- }\r
-\r
- break;\r
- }\r
-\r
- //\r
- // Update the assemble info: increase the current length. If it is\r
- // the frist fragment, update the packet's IP head and per packet\r
- // info. If it is the last fragment, update the total length.\r
- //\r
- Assemble->CurLen += This->Length;\r
-\r
- if (This->Start == 0) {\r
- //\r
- // Once the first fragment is enqueued, it can't be removed\r
- // from the fragment list. So, Assemble->Head always point\r
- // to valid memory area.\r
- //\r
- ASSERT (Assemble->Head == NULL);\r
-\r
- Assemble->Head = IpHead;\r
- Assemble->Info = IP4_GET_CLIP_INFO (Packet);\r
- }\r
-\r
- //\r
- // Don't update the length more than once.\r
- //\r
- if (IP4_LAST_FRAGMENT (IpHead->Fragment) && (Assemble->TotalLen == 0)) {\r
- Assemble->TotalLen = This->End;\r
- }\r
-\r
- //\r
- // Deliver the whole packet if all the fragments received.\r
- // All fragments received if:\r
- // 1. received the last one, so, the total length is know\r
- // 2. received all the data. If the last fragment on the\r
- // queue ends at the total length, all data is received.\r
- //\r
- if ((Assemble->TotalLen != 0) && (Assemble->CurLen >= Assemble->TotalLen)) {\r
-\r
- RemoveEntryList (&Assemble->Link);\r
-\r
- //\r
- // If the packet is properly formated, the last fragment's End\r
- // equals to the packet's total length. Otherwise, the packet\r
- // is a fake, drop it now.\r
- //\r
- Fragment = NET_LIST_USER_STRUCT (Head->BackLink, NET_BUF, List);\r
-\r
- if (IP4_GET_CLIP_INFO (Fragment)->End != Assemble->TotalLen) {\r
- Ip4FreeAssembleEntry (Assemble);\r
- return NULL;\r
- }\r
-\r
- //\r
- // Wrap the packet in a net buffer then deliver it up\r
- //\r
- NewPacket = NetbufFromBufList (\r
- &Assemble->Fragments,\r
- 0,\r
- 0,\r
- Ip4OnFreeFragments,\r
- Assemble\r
- );\r
-\r
- if (NewPacket == NULL) {\r
- Ip4FreeAssembleEntry (Assemble);\r
- return NULL;\r
- }\r
-\r
- NewPacket->Ip.Ip4 = Assemble->Head;\r
-\r
- ASSERT (Assemble->Info != NULL);\r
-\r
- CopyMem (\r
- IP4_GET_CLIP_INFO (NewPacket),\r
- Assemble->Info,\r
- sizeof (*IP4_GET_CLIP_INFO (NewPacket))\r
- );\r
-\r
- return NewPacket;\r
- }\r
-\r
- return NULL;\r
-\r
-DROP:\r
- NetbufFree (Packet);\r
- return NULL;\r
-}\r
-\r
-/**\r
- The callback function for the net buffer which wraps the packet processed by\r
- IPsec. It releases the wrap packet and also signals IPsec to free the resources.\r
-\r
- @param[in] Arg The wrap context\r
-\r
-**/\r
-VOID\r
-EFIAPI\r
-Ip4IpSecFree (\r
- IN VOID *Arg\r
- )\r
-{\r
- IP4_IPSEC_WRAP *Wrap;\r
-\r
- Wrap = (IP4_IPSEC_WRAP *) Arg;\r
-\r
- if (Wrap->IpSecRecycleSignal != NULL) {\r
- gBS->SignalEvent (Wrap->IpSecRecycleSignal);\r
- }\r
-\r
- NetbufFree (Wrap->Packet);\r
-\r
- FreePool (Wrap);\r
-\r
- return;\r
-}\r
-\r
-/**\r
- The work function to locate IPsec protocol to process the inbound or\r
- outbound IP packets. The process routine handls the packet with following\r
- actions: bypass the packet, discard the packet, or protect the packet.\r
-\r
- @param[in] IpSb The IP4 service instance.\r
- @param[in, out] Head The The caller supplied IP4 header.\r
- @param[in, out] Netbuf The IP4 packet to be processed by IPsec.\r
- @param[in, out] Options The caller supplied options.\r
- @param[in, out] OptionsLen The length of the option.\r
- @param[in] Direction The directionality in an SPD entry,\r
- EfiIPsecInBound or EfiIPsecOutBound.\r
- @param[in] Context The token's wrap.\r
-\r
- @retval EFI_SUCCESS The IPsec protocol is not available or disabled.\r
- @retval EFI_SUCCESS The packet was bypassed and all buffers remain the same.\r
- @retval EFI_SUCCESS The packet was protected.\r
- @retval EFI_ACCESS_DENIED The packet was discarded.\r
- @retval EFI_OUT_OF_RESOURCES There is no suffcient resource to complete the operation.\r
- @retval EFI_BUFFER_TOO_SMALL The number of non-empty block is bigger than the\r
- number of input data blocks when build a fragment table.\r
-\r
-**/\r
-EFI_STATUS\r
-Ip4IpSecProcessPacket (\r
- IN IP4_SERVICE *IpSb,\r
- IN OUT IP4_HEAD **Head,\r
- IN OUT NET_BUF **Netbuf,\r
- IN OUT UINT8 **Options,\r
- IN OUT UINT32 *OptionsLen,\r
- IN EFI_IPSEC_TRAFFIC_DIR Direction,\r
- IN VOID *Context\r
- )\r
-{\r
- NET_FRAGMENT *FragmentTable;\r
- NET_FRAGMENT *OriginalFragmentTable;\r
- UINT32 FragmentCount;\r
- UINT32 OriginalFragmentCount;\r
- EFI_EVENT RecycleEvent;\r
- NET_BUF *Packet;\r
- IP4_TXTOKEN_WRAP *TxWrap;\r
- IP4_IPSEC_WRAP *IpSecWrap;\r
- EFI_STATUS Status;\r
- IP4_HEAD ZeroHead;\r
-\r
- Status = EFI_SUCCESS;\r
-\r
- if (!mIpSec2Installed) {\r
- goto ON_EXIT;\r
- }\r
- ASSERT (mIpSec != NULL);\r
-\r
- Packet = *Netbuf;\r
- RecycleEvent = NULL;\r
- IpSecWrap = NULL;\r
- FragmentTable = NULL;\r
- TxWrap = (IP4_TXTOKEN_WRAP *) Context;\r
- FragmentCount = Packet->BlockOpNum;\r
-\r
- ZeroMem (&ZeroHead, sizeof (IP4_HEAD));\r
-\r
- //\r
- // Check whether the IPsec enable variable is set.\r
- //\r
- if (mIpSec->DisabledFlag) {\r
- //\r
- // If IPsec is disabled, restore the original MTU\r
- //\r
- IpSb->MaxPacketSize = IpSb->OldMaxPacketSize;\r
- goto ON_EXIT;\r
- } else {\r
- //\r
- // If IPsec is enabled, use the MTU which reduce the IPsec header length.\r
- //\r
- IpSb->MaxPacketSize = IpSb->OldMaxPacketSize - IP4_MAX_IPSEC_HEADLEN;\r
- }\r
-\r
- //\r
- // Rebuild fragment table from netbuf to ease IPsec process.\r
- //\r
- FragmentTable = AllocateZeroPool (FragmentCount * sizeof (NET_FRAGMENT));\r
-\r
- if (FragmentTable == NULL) {\r
- Status = EFI_OUT_OF_RESOURCES;\r
- goto ON_EXIT;\r
- }\r
-\r
- Status = NetbufBuildExt (Packet, FragmentTable, &FragmentCount);\r
-\r
- //\r
- // Record the original FragmentTable and count.\r
- //\r
- OriginalFragmentTable = FragmentTable;\r
- OriginalFragmentCount = FragmentCount;\r
-\r
- if (EFI_ERROR (Status)) {\r
- FreePool (FragmentTable);\r
- goto ON_EXIT;\r
- }\r
-\r
- //\r
- // Convert host byte order to network byte order\r
- //\r
- Ip4NtohHead (*Head);\r
-\r
- Status = mIpSec->ProcessExt (\r
- mIpSec,\r
- IpSb->Controller,\r
- IP_VERSION_4,\r
- (VOID *) (*Head),\r
- &(*Head)->Protocol,\r
- (VOID **) Options,\r
- OptionsLen,\r
- (EFI_IPSEC_FRAGMENT_DATA **) (&FragmentTable),\r
- &FragmentCount,\r
- Direction,\r
- &RecycleEvent\r
- );\r
- //\r
- // Convert back to host byte order\r
- //\r
- Ip4NtohHead (*Head);\r
-\r
- if (EFI_ERROR (Status)) {\r
- FreePool (OriginalFragmentTable);\r
- goto ON_EXIT;\r
- }\r
-\r
- if (OriginalFragmentTable == FragmentTable && OriginalFragmentCount == FragmentCount) {\r
- //\r
- // For ByPass Packet\r
- //\r
- FreePool (FragmentTable);\r
- goto ON_EXIT;\r
- } else {\r
- //\r
- // Free the FragmentTable which allocated before calling the IPsec.\r
- //\r
- FreePool (OriginalFragmentTable);\r
- }\r
-\r
- if (Direction == EfiIPsecOutBound && TxWrap != NULL) {\r
-\r
- TxWrap->IpSecRecycleSignal = RecycleEvent;\r
- TxWrap->Packet = NetbufFromExt (\r
- FragmentTable,\r
- FragmentCount,\r
- IP4_MAX_HEADLEN,\r
- 0,\r
- Ip4FreeTxToken,\r
- TxWrap\r
- );\r
- if (TxWrap->Packet == NULL) {\r
- //\r
- // Recover the TxWrap->Packet, if meet a error, and the caller will free\r
- // the TxWrap.\r
- //\r
- TxWrap->Packet = *Netbuf;\r
- Status = EFI_OUT_OF_RESOURCES;\r
- goto ON_EXIT;\r
- }\r
-\r
- //\r
- // Free orginal Netbuf.\r
- //\r
- NetIpSecNetbufFree (*Netbuf);\r
- *Netbuf = TxWrap->Packet;\r
-\r
- } else {\r
-\r
- IpSecWrap = AllocateZeroPool (sizeof (IP4_IPSEC_WRAP));\r
-\r
- if (IpSecWrap == NULL) {\r
- Status = EFI_OUT_OF_RESOURCES;\r
- gBS->SignalEvent (RecycleEvent);\r
- goto ON_EXIT;\r
- }\r
-\r
- IpSecWrap->IpSecRecycleSignal = RecycleEvent;\r
- IpSecWrap->Packet = Packet;\r
- Packet = NetbufFromExt (\r
- FragmentTable,\r
- FragmentCount,\r
- IP4_MAX_HEADLEN,\r
- 0,\r
- Ip4IpSecFree,\r
- IpSecWrap\r
- );\r
-\r
- if (Packet == NULL) {\r
- Packet = IpSecWrap->Packet;\r
- gBS->SignalEvent (RecycleEvent);\r
- FreePool (IpSecWrap);\r
- Status = EFI_OUT_OF_RESOURCES;\r
- goto ON_EXIT;\r
- }\r
-\r
- if (Direction == EfiIPsecInBound && 0 != CompareMem (*Head, &ZeroHead, sizeof (IP4_HEAD))) {\r
- Ip4PrependHead (Packet, *Head, *Options, *OptionsLen);\r
- Ip4NtohHead (Packet->Ip.Ip4);\r
- NetbufTrim (Packet, ((*Head)->HeadLen << 2), TRUE);\r
-\r
- CopyMem (\r
- IP4_GET_CLIP_INFO (Packet),\r
- IP4_GET_CLIP_INFO (IpSecWrap->Packet),\r
- sizeof (IP4_CLIP_INFO)\r
- );\r
- }\r
- *Netbuf = Packet;\r
- }\r
-\r
-ON_EXIT:\r
- return Status;\r
-}\r
-\r
-/**\r
- Pre-process the IPv4 packet. First validates the IPv4 packet, and\r
- then reassembles packet if it is necessary.\r
-\r
- @param[in] IpSb Pointer to IP4_SERVICE.\r
- @param[in, out] Packet Pointer to the Packet to be processed.\r
- @param[in] Head Pointer to the IP4_HEAD.\r
- @param[in] Option Pointer to a buffer which contains the IPv4 option.\r
- @param[in] OptionLen The length of Option in bytes.\r
- @param[in] Flag The link layer flag for the packet received, such\r
- as multicast.\r
-\r
- @retval EFI_SEUCCESS The recieved packet is in well form.\r
- @retval EFI_INVAILD_PARAMETER The recieved packet is malformed.\r
-\r
-**/\r
-EFI_STATUS\r
-Ip4PreProcessPacket (\r
- IN IP4_SERVICE *IpSb,\r
- IN OUT NET_BUF **Packet,\r
- IN IP4_HEAD *Head,\r
- IN UINT8 *Option,\r
- IN UINT32 OptionLen,\r
- IN UINT32 Flag\r
- )\r
-{\r
- IP4_CLIP_INFO *Info;\r
- UINT32 HeadLen;\r
- UINT32 TotalLen;\r
- UINT16 Checksum;\r
-\r
- //\r
- // Check if the IP4 header is correctly formatted.\r
- //\r
- if ((*Packet)->TotalSize < IP4_MIN_HEADLEN) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- HeadLen = (Head->HeadLen << 2);\r
- TotalLen = NTOHS (Head->TotalLen);\r
-\r
- //\r
- // Mnp may deliver frame trailer sequence up, trim it off.\r
- //\r
- if (TotalLen < (*Packet)->TotalSize) {\r
- NetbufTrim (*Packet, (*Packet)->TotalSize - TotalLen, FALSE);\r
- }\r
-\r
- if ((Head->Ver != 4) || (HeadLen < IP4_MIN_HEADLEN) ||\r
- (TotalLen < HeadLen) || (TotalLen != (*Packet)->TotalSize)) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- //\r
- // Some OS may send IP packets without checksum.\r
- //\r
- Checksum = (UINT16) (~NetblockChecksum ((UINT8 *) Head, HeadLen));\r
-\r
- if ((Head->Checksum != 0) && (Checksum != 0)) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- //\r
- // Convert the IP header to host byte order, then get the per packet info.\r
- //\r
- (*Packet)->Ip.Ip4 = Ip4NtohHead (Head);\r
-\r
- Info = IP4_GET_CLIP_INFO (*Packet);\r
- Info->LinkFlag = Flag;\r
- Info->CastType = Ip4GetHostCast (IpSb, Head->Dst, Head->Src);\r
- Info->Start = (Head->Fragment & IP4_HEAD_OFFSET_MASK) << 3;\r
- Info->Length = Head->TotalLen - HeadLen;\r
- Info->End = Info->Start + Info->Length;\r
- Info->Status = EFI_SUCCESS;\r
-\r
- //\r
- // The packet is destinated to us if the CastType is non-zero.\r
- //\r
- if ((Info->CastType == 0) || (Info->End > IP4_MAX_PACKET_SIZE)) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- //\r
- // Validate the options. Don't call the Ip4OptionIsValid if\r
- // there is no option to save some CPU process.\r
- //\r
-\r
- if ((OptionLen > 0) && !Ip4OptionIsValid (Option, OptionLen, TRUE)) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- //\r
- // Trim the head off, after this point, the packet is headless,\r
- // and Packet->TotalLen == Info->Length.\r
- //\r
- NetbufTrim (*Packet, HeadLen, TRUE);\r
-\r
- //\r
- // Reassemble the packet if this is a fragment. The packet is a\r
- // fragment if its head has MF (more fragment) set, or it starts\r
- // at non-zero byte.\r
- //\r
- if (((Head->Fragment & IP4_HEAD_MF_MASK) != 0) || (Info->Start != 0)) {\r
- //\r
- // Drop the fragment if DF is set but it is fragmented. Gateway\r
- // need to send a type 4 destination unreache ICMP message here.\r
- //\r
- if ((Head->Fragment & IP4_HEAD_DF_MASK) != 0) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- //\r
- // The length of all but the last fragments is in the unit of 8 bytes.\r
- //\r
- if (((Head->Fragment & IP4_HEAD_MF_MASK) != 0) && (Info->Length % 8 != 0)) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- *Packet = Ip4Reassemble (&IpSb->Assemble, *Packet);\r
-\r
- //\r
- // Packet assembly isn't complete, start receive more packet.\r
- //\r
- if (*Packet == NULL) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
- }\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-/**\r
- The IP4 input routine. It is called by the IP4_INTERFACE when a\r
- IP4 fragment is received from MNP.\r
-\r
- @param[in] Ip4Instance The IP4 child that request the receive, most like\r
- it is NULL.\r
- @param[in] Packet The IP4 packet received.\r
- @param[in] IoStatus The return status of receive request.\r
- @param[in] Flag The link layer flag for the packet received, such\r
- as multicast.\r
- @param[in] Context The IP4 service instance that own the MNP.\r
-\r
-**/\r
-VOID\r
-Ip4AccpetFrame (\r
- IN IP4_PROTOCOL *Ip4Instance,\r
- IN NET_BUF *Packet,\r
- IN EFI_STATUS IoStatus,\r
- IN UINT32 Flag,\r
- IN VOID *Context\r
- )\r
-{\r
- IP4_SERVICE *IpSb;\r
- IP4_HEAD *Head;\r
- EFI_STATUS Status;\r
- IP4_HEAD ZeroHead;\r
- UINT8 *Option;\r
- UINT32 OptionLen;\r
-\r
- IpSb = (IP4_SERVICE *) Context;\r
- Option = NULL;\r
-\r
- if (EFI_ERROR (IoStatus) || (IpSb->State == IP4_SERVICE_DESTROY)) {\r
- goto DROP;\r
- }\r
-\r
- Head = (IP4_HEAD *) NetbufGetByte (Packet, 0, NULL);\r
- ASSERT (Head != NULL);\r
- OptionLen = (Head->HeadLen << 2) - IP4_MIN_HEADLEN;\r
- if (OptionLen > 0) {\r
- Option = (UINT8 *) (Head + 1);\r
- }\r
-\r
- //\r
- // Validate packet format and reassemble packet if it is necessary.\r
- //\r
- Status = Ip4PreProcessPacket (\r
- IpSb,\r
- &Packet,\r
- Head,\r
- Option,\r
- OptionLen,\r
- Flag\r
- );\r
-\r
- if (EFI_ERROR (Status)) {\r
- goto RESTART;\r
- }\r
-\r
- //\r
- // After trim off, the packet is a esp/ah/udp/tcp/icmp6 net buffer,\r
- // and no need consider any other ahead ext headers.\r
- //\r
- Status = Ip4IpSecProcessPacket (\r
- IpSb,\r
- &Head,\r
- &Packet,\r
- &Option,\r
- &OptionLen,\r
- EfiIPsecInBound,\r
- NULL\r
- );\r
-\r
- if (EFI_ERROR (Status)) {\r
- goto RESTART;\r
- }\r
-\r
- //\r
- // If the packet is protected by tunnel mode, parse the inner Ip Packet.\r
- //\r
- ZeroMem (&ZeroHead, sizeof (IP4_HEAD));\r
- if (0 == CompareMem (Head, &ZeroHead, sizeof (IP4_HEAD))) {\r
- // Packet may have been changed. Head, HeadLen, TotalLen, and\r
- // info must be reloaded bofore use. The ownership of the packet\r
- // is transfered to the packet process logic.\r
- //\r
- Head = (IP4_HEAD *) NetbufGetByte (Packet, 0, NULL);\r
- ASSERT (Head != NULL);\r
- Status = Ip4PreProcessPacket (\r
- IpSb,\r
- &Packet,\r
- Head,\r
- Option,\r
- OptionLen,\r
- Flag\r
- );\r
- if (EFI_ERROR (Status)) {\r
- goto RESTART;\r
- }\r
- }\r
-\r
- ASSERT (Packet != NULL);\r
- Head = Packet->Ip.Ip4;\r
- IP4_GET_CLIP_INFO (Packet)->Status = EFI_SUCCESS;\r
-\r
- switch (Head->Protocol) {\r
- case EFI_IP_PROTO_ICMP:\r
- Ip4IcmpHandle (IpSb, Head, Packet);\r
- break;\r
-\r
- case IP4_PROTO_IGMP:\r
- Ip4IgmpHandle (IpSb, Head, Packet);\r
- break;\r
-\r
- default:\r
- Ip4Demultiplex (IpSb, Head, Packet, Option, OptionLen);\r
- }\r
-\r
- Packet = NULL;\r
-\r
- //\r
- // Dispatch the DPCs queued by the NotifyFunction of the rx token's events\r
- // which are signaled with received data.\r
- //\r
- DispatchDpc ();\r
-\r
-RESTART:\r
- Ip4ReceiveFrame (IpSb->DefaultInterface, NULL, Ip4AccpetFrame, IpSb);\r
-\r
-DROP:\r
- if (Packet != NULL) {\r
- NetbufFree (Packet);\r
- }\r
-\r
- return ;\r
-}\r
-\r
-\r
-/**\r
- Check whether this IP child accepts the packet.\r
-\r
- @param[in] IpInstance The IP child to check\r
- @param[in] Head The IP header of the packet\r
- @param[in] Packet The data of the packet\r
-\r
- @retval TRUE If the child wants to receive the packet.\r
- @retval FALSE Otherwise.\r
-\r
-**/\r
-BOOLEAN\r
-Ip4InstanceFrameAcceptable (\r
- IN IP4_PROTOCOL *IpInstance,\r
- IN IP4_HEAD *Head,\r
- IN NET_BUF *Packet\r
- )\r
-{\r
- IP4_ICMP_ERROR_HEAD Icmp;\r
- EFI_IP4_CONFIG_DATA *Config;\r
- IP4_CLIP_INFO *Info;\r
- UINT16 Proto;\r
- UINT32 Index;\r
-\r
- Config = &IpInstance->ConfigData;\r
-\r
- //\r
- // Dirty trick for the Tiano UEFI network stack implmentation. If\r
- // ReceiveTimeout == -1, the receive of the packet for this instance\r
- // is disabled. The UEFI spec don't have such capability. We add\r
- // this to improve the performance because IP will make a copy of\r
- // the received packet for each accepting instance. Some IP instances\r
- // used by UDP/TCP only send packets, they don't wants to receive.\r
- //\r
- if (Config->ReceiveTimeout == (UINT32)(-1)) {\r
- return FALSE;\r
- }\r
-\r
- if (Config->AcceptPromiscuous) {\r
- return TRUE;\r
- }\r
-\r
- //\r
- // Use protocol from the IP header embedded in the ICMP error\r
- // message to filter, instead of ICMP itself. ICMP handle will\r
- // call Ip4Demultiplex to deliver ICMP errors.\r
- //\r
- Proto = Head->Protocol;\r
-\r
- if ((Proto == EFI_IP_PROTO_ICMP) && (!Config->AcceptAnyProtocol) && (Proto != Config->DefaultProtocol)) {\r
- NetbufCopy (Packet, 0, sizeof (Icmp.Head), (UINT8 *) &Icmp.Head);\r
-\r
- if (mIcmpClass[Icmp.Head.Type].IcmpClass == ICMP_ERROR_MESSAGE) {\r
- if (!Config->AcceptIcmpErrors) {\r
- return FALSE;\r
- }\r
-\r
- NetbufCopy (Packet, 0, sizeof (Icmp), (UINT8 *) &Icmp);\r
- Proto = Icmp.IpHead.Protocol;\r
- }\r
- }\r
-\r
- //\r
- // Match the protocol\r
- //\r
- if (!Config->AcceptAnyProtocol && (Proto != Config->DefaultProtocol)) {\r
- return FALSE;\r
- }\r
-\r
- //\r
- // Check for broadcast, the caller has computed the packet's\r
- // cast type for this child's interface.\r
- //\r
- Info = IP4_GET_CLIP_INFO (Packet);\r
-\r
- if (IP4_IS_BROADCAST (Info->CastType)) {\r
- return Config->AcceptBroadcast;\r
- }\r
-\r
- //\r
- // If it is a multicast packet, check whether we are in the group.\r
- //\r
- if (Info->CastType == IP4_MULTICAST) {\r
- //\r
- // Receive the multicast if the instance wants to receive all packets.\r
- //\r
- if (!IpInstance->ConfigData.UseDefaultAddress && (IpInstance->Interface->Ip == 0)) {\r
- return TRUE;\r
- }\r
-\r
- for (Index = 0; Index < IpInstance->GroupCount; Index++) {\r
- if (IpInstance->Groups[Index] == HTONL (Head->Dst)) {\r
- break;\r
- }\r
- }\r
-\r
- return (BOOLEAN)(Index < IpInstance->GroupCount);\r
- }\r
-\r
- return TRUE;\r
-}\r
-\r
-\r
-/**\r
- Enqueue a shared copy of the packet to the IP4 child if the\r
- packet is acceptable to it. Here the data of the packet is\r
- shared, but the net buffer isn't.\r
-\r
- @param[in] IpInstance The IP4 child to enqueue the packet to\r
- @param[in] Head The IP header of the received packet\r
- @param[in] Packet The data of the received packet\r
-\r
- @retval EFI_NOT_STARTED The IP child hasn't been configured.\r
- @retval EFI_INVALID_PARAMETER The child doesn't want to receive the packet\r
- @retval EFI_OUT_OF_RESOURCES Failed to allocate some resource\r
- @retval EFI_SUCCESS A shared copy the packet is enqueued to the child.\r
-\r
-**/\r
-EFI_STATUS\r
-Ip4InstanceEnquePacket (\r
- IN IP4_PROTOCOL *IpInstance,\r
- IN IP4_HEAD *Head,\r
- IN NET_BUF *Packet\r
- )\r
-{\r
- IP4_CLIP_INFO *Info;\r
- NET_BUF *Clone;\r
-\r
- //\r
- // Check whether the packet is acceptable to this instance.\r
- //\r
- if (IpInstance->State != IP4_STATE_CONFIGED) {\r
- return EFI_NOT_STARTED;\r
- }\r
-\r
- if (!Ip4InstanceFrameAcceptable (IpInstance, Head, Packet)) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- //\r
- // Enque a shared copy of the packet.\r
- //\r
- Clone = NetbufClone (Packet);\r
-\r
- if (Clone == NULL) {\r
- return EFI_OUT_OF_RESOURCES;\r
- }\r
-\r
- //\r
- // Set the receive time out for the assembled packet. If it expires,\r
- // packet will be removed from the queue.\r
- //\r
- Info = IP4_GET_CLIP_INFO (Clone);\r
- Info->Life = IP4_US_TO_SEC (IpInstance->ConfigData.ReceiveTimeout);\r
-\r
- InsertTailList (&IpInstance->Received, &Clone->List);\r
- return EFI_SUCCESS;\r
-}\r
-\r
-\r
-/**\r
- The signal handle of IP4's recycle event. It is called back\r
- when the upper layer release the packet.\r
-\r
- @param Event The IP4's recycle event.\r
- @param Context The context of the handle, which is a\r
- IP4_RXDATA_WRAP\r
-\r
-**/\r
-VOID\r
-EFIAPI\r
-Ip4OnRecyclePacket (\r
- IN EFI_EVENT Event,\r
- IN VOID *Context\r
- )\r
-{\r
- IP4_RXDATA_WRAP *Wrap;\r
-\r
- Wrap = (IP4_RXDATA_WRAP *) Context;\r
-\r
- EfiAcquireLockOrFail (&Wrap->IpInstance->RecycleLock);\r
- RemoveEntryList (&Wrap->Link);\r
- EfiReleaseLock (&Wrap->IpInstance->RecycleLock);\r
-\r
- ASSERT (!NET_BUF_SHARED (Wrap->Packet));\r
- NetbufFree (Wrap->Packet);\r
-\r
- gBS->CloseEvent (Wrap->RxData.RecycleSignal);\r
- FreePool (Wrap);\r
-}\r
-\r
-\r
-/**\r
- Wrap the received packet to a IP4_RXDATA_WRAP, which will be\r
- delivered to the upper layer. Each IP4 child that accepts the\r
- packet will get a not-shared copy of the packet which is wrapped\r
- in the IP4_RXDATA_WRAP. The IP4_RXDATA_WRAP->RxData is passed\r
- to the upper layer. Upper layer will signal the recycle event in\r
- it when it is done with the packet.\r
-\r
- @param[in] IpInstance The IP4 child to receive the packet.\r
- @param[in] Packet The packet to deliver up.\r
-\r
- @retval Wrap if warp the packet succeed.\r
- @retval NULL failed to wrap the packet .\r
-\r
-**/\r
-IP4_RXDATA_WRAP *\r
-Ip4WrapRxData (\r
- IN IP4_PROTOCOL *IpInstance,\r
- IN NET_BUF *Packet\r
- )\r
-{\r
- IP4_RXDATA_WRAP *Wrap;\r
- EFI_IP4_RECEIVE_DATA *RxData;\r
- EFI_STATUS Status;\r
- BOOLEAN RawData;\r
-\r
- Wrap = AllocatePool (IP4_RXDATA_WRAP_SIZE (Packet->BlockOpNum));\r
-\r
- if (Wrap == NULL) {\r
- return NULL;\r
- }\r
-\r
- InitializeListHead (&Wrap->Link);\r
-\r
- Wrap->IpInstance = IpInstance;\r
- Wrap->Packet = Packet;\r
- RxData = &Wrap->RxData;\r
-\r
- ZeroMem (RxData, sizeof (EFI_IP4_RECEIVE_DATA));\r
-\r
- Status = gBS->CreateEvent (\r
- EVT_NOTIFY_SIGNAL,\r
- TPL_NOTIFY,\r
- Ip4OnRecyclePacket,\r
- Wrap,\r
- &RxData->RecycleSignal\r
- );\r
-\r
- if (EFI_ERROR (Status)) {\r
- FreePool (Wrap);\r
- return NULL;\r
- }\r
-\r
- ASSERT (Packet->Ip.Ip4 != NULL);\r
-\r
- ASSERT (IpInstance != NULL);\r
- RawData = IpInstance->ConfigData.RawData;\r
-\r
- //\r
- // The application expects a network byte order header.\r
- //\r
- if (!RawData) {\r
- RxData->HeaderLength = (Packet->Ip.Ip4->HeadLen << 2);\r
- RxData->Header = (EFI_IP4_HEADER *) Ip4NtohHead (Packet->Ip.Ip4);\r
- RxData->OptionsLength = RxData->HeaderLength - IP4_MIN_HEADLEN;\r
- RxData->Options = NULL;\r
-\r
- if (RxData->OptionsLength != 0) {\r
- RxData->Options = (VOID *) (RxData->Header + 1);\r
- }\r
- }\r
-\r
- RxData->DataLength = Packet->TotalSize;\r
-\r
- //\r
- // Build the fragment table to be delivered up.\r
- //\r
- RxData->FragmentCount = Packet->BlockOpNum;\r
- NetbufBuildExt (Packet, (NET_FRAGMENT *) RxData->FragmentTable, &RxData->FragmentCount);\r
-\r
- return Wrap;\r
-}\r
-\r
-\r
-/**\r
- Deliver the received packets to upper layer if there are both received\r
- requests and enqueued packets. If the enqueued packet is shared, it will\r
- duplicate it to a non-shared packet, release the shared packet, then\r
- deliver the non-shared packet up.\r
-\r
- @param[in] IpInstance The IP child to deliver the packet up.\r
-\r
- @retval EFI_OUT_OF_RESOURCES Failed to allocate resources to deliver the\r
- packets.\r
- @retval EFI_SUCCESS All the enqueued packets that can be delivered\r
- are delivered up.\r
-\r
-**/\r
-EFI_STATUS\r
-Ip4InstanceDeliverPacket (\r
- IN IP4_PROTOCOL *IpInstance\r
- )\r
-{\r
- EFI_IP4_COMPLETION_TOKEN *Token;\r
- IP4_RXDATA_WRAP *Wrap;\r
- NET_BUF *Packet;\r
- NET_BUF *Dup;\r
- UINT8 *Head;\r
- UINT32 HeadLen;\r
-\r
- //\r
- // Deliver a packet if there are both a packet and a receive token.\r
- //\r
- while (!IsListEmpty (&IpInstance->Received) &&\r
- !NetMapIsEmpty (&IpInstance->RxTokens)) {\r
-\r
- Packet = NET_LIST_HEAD (&IpInstance->Received, NET_BUF, List);\r
-\r
- if (!NET_BUF_SHARED (Packet)) {\r
- //\r
- // If this is the only instance that wants the packet, wrap it up.\r
- //\r
- Wrap = Ip4WrapRxData (IpInstance, Packet);\r
-\r
- if (Wrap == NULL) {\r
- return EFI_OUT_OF_RESOURCES;\r
- }\r
-\r
- RemoveEntryList (&Packet->List);\r
-\r
- } else {\r
- //\r
- // Create a duplicated packet if this packet is shared\r
- //\r
- if (IpInstance->ConfigData.RawData) {\r
- HeadLen = 0;\r
- } else {\r
- HeadLen = IP4_MAX_HEADLEN;\r
- }\r
-\r
- Dup = NetbufDuplicate (Packet, NULL, HeadLen);\r
-\r
- if (Dup == NULL) {\r
- return EFI_OUT_OF_RESOURCES;\r
- }\r
-\r
- if (!IpInstance->ConfigData.RawData) {\r
- //\r
- // Copy the IP head over. The packet to deliver up is\r
- // headless. Trim the head off after copy. The IP head\r
- // may be not continuous before the data.\r
- //\r
- Head = NetbufAllocSpace (Dup, IP4_MAX_HEADLEN, NET_BUF_HEAD);\r
- ASSERT (Head != NULL);\r
-\r
- Dup->Ip.Ip4 = (IP4_HEAD *) Head;\r
-\r
- CopyMem (Head, Packet->Ip.Ip4, Packet->Ip.Ip4->HeadLen << 2);\r
- NetbufTrim (Dup, IP4_MAX_HEADLEN, TRUE);\r
- }\r
-\r
- Wrap = Ip4WrapRxData (IpInstance, Dup);\r
-\r
- if (Wrap == NULL) {\r
- NetbufFree (Dup);\r
- return EFI_OUT_OF_RESOURCES;\r
- }\r
-\r
- RemoveEntryList (&Packet->List);\r
- NetbufFree (Packet);\r
-\r
- Packet = Dup;\r
- }\r
-\r
- //\r
- // Insert it into the delivered packet, then get a user's\r
- // receive token, pass the wrapped packet up.\r
- //\r
- EfiAcquireLockOrFail (&IpInstance->RecycleLock);\r
- InsertHeadList (&IpInstance->Delivered, &Wrap->Link);\r
- EfiReleaseLock (&IpInstance->RecycleLock);\r
-\r
- Token = NetMapRemoveHead (&IpInstance->RxTokens, NULL);\r
- Token->Status = IP4_GET_CLIP_INFO (Packet)->Status;\r
- Token->Packet.RxData = &Wrap->RxData;\r
-\r
- gBS->SignalEvent (Token->Event);\r
- }\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-\r
-/**\r
- Enqueue a received packet to all the IP children that share\r
- the same interface.\r
-\r
- @param[in] IpSb The IP4 service instance that receive the packet.\r
- @param[in] Head The header of the received packet.\r
- @param[in] Packet The data of the received packet.\r
- @param[in] Option Point to the IP4 packet header options.\r
- @param[in] OptionLen Length of the IP4 packet header options.\r
- @param[in] IpIf The interface to enqueue the packet to.\r
-\r
- @return The number of the IP4 children that accepts the packet\r
-\r
-**/\r
-INTN\r
-Ip4InterfaceEnquePacket (\r
- IN IP4_SERVICE *IpSb,\r
- IN IP4_HEAD *Head,\r
- IN NET_BUF *Packet,\r
- IN UINT8 *Option,\r
- IN UINT32 OptionLen,\r
- IN IP4_INTERFACE *IpIf\r
- )\r
-{\r
- IP4_PROTOCOL *IpInstance;\r
- IP4_CLIP_INFO *Info;\r
- LIST_ENTRY *Entry;\r
- INTN Enqueued;\r
- INTN LocalType;\r
- INTN SavedType;\r
-\r
- //\r
- // First, check that the packet is acceptable to this interface\r
- // and find the local cast type for the interface. A packet sent\r
- // to say 192.168.1.1 should NOT be delliever to 10.0.0.1 unless\r
- // promiscuous receiving.\r
- //\r
- LocalType = 0;\r
- Info = IP4_GET_CLIP_INFO (Packet);\r
-\r
- if ((Info->CastType == IP4_MULTICAST) || (Info->CastType == IP4_LOCAL_BROADCAST)) {\r
- //\r
- // If the CastType is multicast, don't need to filter against\r
- // the group address here, Ip4InstanceFrameAcceptable will do\r
- // that later.\r
- //\r
- LocalType = Info->CastType;\r
-\r
- } else {\r
- //\r
- // Check the destination againist local IP. If the station\r
- // address is 0.0.0.0, it means receiving all the IP destined\r
- // to local non-zero IP. Otherwise, it is necessary to compare\r
- // the destination to the interface's IP address.\r
- //\r
- if (IpIf->Ip == IP4_ALLZERO_ADDRESS) {\r
- LocalType = IP4_LOCAL_HOST;\r
-\r
- } else {\r
- LocalType = Ip4GetNetCast (Head->Dst, IpIf);\r
-\r
- if ((LocalType == 0) && IpIf->PromiscRecv) {\r
- LocalType = IP4_PROMISCUOUS;\r
- }\r
- }\r
- }\r
-\r
- if (LocalType == 0) {\r
- return 0;\r
- }\r
-\r
- //\r
- // Iterate through the ip instances on the interface, enqueue\r
- // the packet if filter passed. Save the original cast type,\r
- // and pass the local cast type to the IP children on the\r
- // interface. The global cast type will be restored later.\r
- //\r
- SavedType = Info->CastType;\r
- Info->CastType = LocalType;\r
-\r
- Enqueued = 0;\r
-\r
- NET_LIST_FOR_EACH (Entry, &IpIf->IpInstances) {\r
- IpInstance = NET_LIST_USER_STRUCT (Entry, IP4_PROTOCOL, AddrLink);\r
- NET_CHECK_SIGNATURE (IpInstance, IP4_PROTOCOL_SIGNATURE);\r
-\r
- //\r
- // In RawData mode, add IPv4 headers and options back to packet.\r
- //\r
- if ((IpInstance->ConfigData.RawData) && (Option != NULL) && (OptionLen != 0)){\r
- Ip4PrependHead (Packet, Head, Option, OptionLen);\r
- }\r
-\r
- if (Ip4InstanceEnquePacket (IpInstance, Head, Packet) == EFI_SUCCESS) {\r
- Enqueued++;\r
- }\r
- }\r
-\r
- Info->CastType = SavedType;\r
- return Enqueued;\r
-}\r
-\r
-\r
-/**\r
- Deliver the packet for each IP4 child on the interface.\r
-\r
- @param[in] IpSb The IP4 service instance that received the packet\r
- @param[in] IpIf The IP4 interface to deliver the packet.\r
-\r
- @retval EFI_SUCCESS It always returns EFI_SUCCESS now\r
-\r
-**/\r
-EFI_STATUS\r
-Ip4InterfaceDeliverPacket (\r
- IN IP4_SERVICE *IpSb,\r
- IN IP4_INTERFACE *IpIf\r
- )\r
-{\r
- IP4_PROTOCOL *Ip4Instance;\r
- LIST_ENTRY *Entry;\r
-\r
- NET_LIST_FOR_EACH (Entry, &IpIf->IpInstances) {\r
- Ip4Instance = NET_LIST_USER_STRUCT (Entry, IP4_PROTOCOL, AddrLink);\r
- Ip4InstanceDeliverPacket (Ip4Instance);\r
- }\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-\r
-/**\r
- Demultiple the packet. the packet delivery is processed in two\r
- passes. The first pass will enque a shared copy of the packet\r
- to each IP4 child that accepts the packet. The second pass will\r
- deliver a non-shared copy of the packet to each IP4 child that\r
- has pending receive requests. Data is copied if more than one\r
- child wants to consume the packet because each IP child needs\r
- its own copy of the packet to make changes.\r
-\r
- @param[in] IpSb The IP4 service instance that received the packet.\r
- @param[in] Head The header of the received packet.\r
- @param[in] Packet The data of the received packet.\r
- @param[in] Option Point to the IP4 packet header options.\r
- @param[in] OptionLen Length of the IP4 packet header options.\r
-\r
- @retval EFI_NOT_FOUND No IP child accepts the packet.\r
- @retval EFI_SUCCESS The packet is enqueued or delivered to some IP\r
- children.\r
-\r
-**/\r
-EFI_STATUS\r
-Ip4Demultiplex (\r
- IN IP4_SERVICE *IpSb,\r
- IN IP4_HEAD *Head,\r
- IN NET_BUF *Packet,\r
- IN UINT8 *Option,\r
- IN UINT32 OptionLen\r
- )\r
-{\r
- LIST_ENTRY *Entry;\r
- IP4_INTERFACE *IpIf;\r
- INTN Enqueued;\r
-\r
- //\r
- // Two pass delivery: first, enque a shared copy of the packet\r
- // to each instance that accept the packet.\r
- //\r
- Enqueued = 0;\r
-\r
- NET_LIST_FOR_EACH (Entry, &IpSb->Interfaces) {\r
- IpIf = NET_LIST_USER_STRUCT (Entry, IP4_INTERFACE, Link);\r
-\r
- if (IpIf->Configured) {\r
- Enqueued += Ip4InterfaceEnquePacket (\r
- IpSb,\r
- Head,\r
- Packet,\r
- Option,\r
- OptionLen,\r
- IpIf\r
- );\r
- }\r
- }\r
-\r
- //\r
- // Second: deliver a duplicate of the packet to each instance.\r
- // Release the local reference first, so that the last instance\r
- // getting the packet will not copy the data.\r
- //\r
- NetbufFree (Packet);\r
-\r
- if (Enqueued == 0) {\r
- return EFI_NOT_FOUND;\r
- }\r
-\r
- NET_LIST_FOR_EACH (Entry, &IpSb->Interfaces) {\r
- IpIf = NET_LIST_USER_STRUCT (Entry, IP4_INTERFACE, Link);\r
-\r
- if (IpIf->Configured) {\r
- Ip4InterfaceDeliverPacket (IpSb, IpIf);\r
- }\r
- }\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-\r
-/**\r
- Timeout the fragment and enqueued packets.\r
-\r
- @param[in] IpSb The IP4 service instance to timeout\r
-\r
-**/\r
-VOID\r
-Ip4PacketTimerTicking (\r
- IN IP4_SERVICE *IpSb\r
- )\r
-{\r
- LIST_ENTRY *InstanceEntry;\r
- LIST_ENTRY *Entry;\r
- LIST_ENTRY *Next;\r
- IP4_PROTOCOL *IpInstance;\r
- IP4_ASSEMBLE_ENTRY *Assemble;\r
- NET_BUF *Packet;\r
- IP4_CLIP_INFO *Info;\r
- UINT32 Index;\r
-\r
- //\r
- // First, time out the fragments. The packet's life is counting down\r
- // once the first-arrived fragment was received.\r
- //\r
- for (Index = 0; Index < IP4_ASSEMLE_HASH_SIZE; Index++) {\r
- NET_LIST_FOR_EACH_SAFE (Entry, Next, &IpSb->Assemble.Bucket[Index]) {\r
- Assemble = NET_LIST_USER_STRUCT (Entry, IP4_ASSEMBLE_ENTRY, Link);\r
-\r
- if ((Assemble->Life > 0) && (--Assemble->Life == 0)) {\r
- RemoveEntryList (Entry);\r
- Ip4FreeAssembleEntry (Assemble);\r
- }\r
- }\r
- }\r
-\r
- NET_LIST_FOR_EACH (InstanceEntry, &IpSb->Children) {\r
- IpInstance = NET_LIST_USER_STRUCT (InstanceEntry, IP4_PROTOCOL, Link);\r
-\r
- //\r
- // Second, time out the assembled packets enqueued on each IP child.\r
- //\r
- NET_LIST_FOR_EACH_SAFE (Entry, Next, &IpInstance->Received) {\r
- Packet = NET_LIST_USER_STRUCT (Entry, NET_BUF, List);\r
- Info = IP4_GET_CLIP_INFO (Packet);\r
-\r
- if ((Info->Life > 0) && (--Info->Life == 0)) {\r
- RemoveEntryList (Entry);\r
- NetbufFree (Packet);\r
- }\r
- }\r
-\r
- //\r
- // Third: time out the transmitted packets.\r
- //\r
- NetMapIterate (&IpInstance->TxTokens, Ip4SentPacketTicking, NULL);\r
- }\r
-}\r
projects / mirror_edk2.git / blobdiff