| 1 | /** @file
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| 2 | Mtftp6 Wrq process functions implementation.
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| 3 |
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| 4 | Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>
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| 5 |
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| 6 | SPDX-License-Identifier: BSD-2-Clause-Patent
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| 7 |
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| 8 | **/
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| 9 |
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| 10 | #include "Mtftp6Impl.h"
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| 11 |
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| 12 |
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| 13 |
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| 14 | /**
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| 15 | Build and send a Mtftp6 data packet for upload.
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| 16 |
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| 17 | @param[in] Instance The pointer to the Mtftp6 instance.
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| 18 | @param[in] BlockNum The block num to be sent.
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| 19 |
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| 20 | @retval EFI_OUT_OF_RESOURCES Failed to allocate memory for the packet.
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| 21 | @retval EFI_SUCCESS The data packet was sent.
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| 22 | @retval EFI_ABORTED The user aborted this process.
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| 23 |
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| 24 | **/
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| 25 | EFI_STATUS
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| 26 | Mtftp6WrqSendBlock (
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| 27 | IN MTFTP6_INSTANCE *Instance,
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| 28 | IN UINT16 BlockNum
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| 29 | )
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| 30 | {
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| 31 | EFI_MTFTP6_PACKET *Packet;
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| 32 | EFI_MTFTP6_TOKEN *Token;
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| 33 | NET_BUF *UdpPacket;
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| 34 | EFI_STATUS Status;
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| 35 | UINT16 DataLen;
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| 36 | UINT8 *DataBuf;
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| 37 | UINT64 Start;
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| 38 |
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| 39 | //
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| 40 | // Allocate net buffer to create data packet.
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| 41 | //
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| 42 | UdpPacket = NetbufAlloc (Instance->BlkSize + MTFTP6_DATA_HEAD_LEN);
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| 43 |
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| 44 | if (UdpPacket == NULL) {
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| 45 | return EFI_OUT_OF_RESOURCES;
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| 46 | }
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| 47 |
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| 48 | Packet = (EFI_MTFTP6_PACKET *) NetbufAllocSpace (
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| 49 | UdpPacket,
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| 50 | MTFTP6_DATA_HEAD_LEN,
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| 51 | FALSE
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| 52 | );
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| 53 | ASSERT (Packet != NULL);
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| 54 |
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| 55 | Packet->Data.OpCode = HTONS (EFI_MTFTP6_OPCODE_DATA);
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| 56 | Packet->Data.Block = HTONS (BlockNum);
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| 57 |
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| 58 | //
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| 59 | // Read the block from either the buffer or PacketNeeded callback
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| 60 | //
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| 61 | Token = Instance->Token;
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| 62 | DataLen = Instance->BlkSize;
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| 63 |
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| 64 | if (Token->Buffer != NULL) {
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| 65 | Start = MultU64x32 (BlockNum - 1, Instance->BlkSize);
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| 66 |
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| 67 | if (Token->BufferSize < Start + Instance->BlkSize) {
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| 68 | DataLen = (UINT16) (Token->BufferSize - Start);
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| 69 | Instance->LastBlk = BlockNum;
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| 70 | Mtftp6SetLastBlockNum (&Instance->BlkList, BlockNum);
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| 71 | }
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| 72 |
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| 73 | if (DataLen > 0) {
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| 74 | NetbufAllocSpace (UdpPacket, DataLen, FALSE);
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| 75 | CopyMem (Packet->Data.Data, (UINT8 *) Token->Buffer + Start, DataLen);
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| 76 | }
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| 77 |
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| 78 | } else {
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| 79 | //
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| 80 | // Get data from PacketNeeded
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| 81 | //
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| 82 | DataBuf = NULL;
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| 83 | Status = Token->PacketNeeded (&Instance->Mtftp6, Token, &DataLen, (VOID*) &DataBuf);
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| 84 |
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| 85 | if (EFI_ERROR (Status) || (DataLen > Instance->BlkSize)) {
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| 86 | if (DataBuf != NULL) {
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| 87 | gBS->FreePool (DataBuf);
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| 88 | }
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| 89 | //
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| 90 | // The received packet has already been freed.
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| 91 | //
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| 92 | Mtftp6SendError (
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| 93 | Instance,
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| 94 | EFI_MTFTP6_ERRORCODE_REQUEST_DENIED,
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| 95 | (UINT8 *) "User aborted the transfer"
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| 96 | );
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| 97 |
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| 98 | return EFI_ABORTED;
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| 99 | }
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| 100 |
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| 101 | if (DataLen < Instance->BlkSize) {
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| 102 | Instance->LastBlk = BlockNum;
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| 103 | Mtftp6SetLastBlockNum (&Instance->BlkList, BlockNum);
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| 104 | }
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| 105 |
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| 106 | if (DataLen > 0) {
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| 107 | NetbufAllocSpace (UdpPacket, DataLen, FALSE);
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| 108 | CopyMem (Packet->Data.Data, DataBuf, DataLen);
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| 109 | gBS->FreePool (DataBuf);
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| 110 | }
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| 111 | }
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| 112 |
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| 113 | //
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| 114 | // Reset current retry count of the instance.
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| 115 | //
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| 116 | Instance->CurRetry = 0;
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| 117 |
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| 118 | return Mtftp6TransmitPacket (Instance, UdpPacket);
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| 119 | }
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| 120 |
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| 121 |
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| 122 | /**
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| 123 | Function to handle received ACK packet. If the ACK number matches the
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| 124 | expected block number, with more data pending, send the next
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| 125 | block. Otherwise, tell the caller that we are done.
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| 126 |
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| 127 | @param[in] Instance The pointer to the Mtftp6 instance.
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| 128 | @param[in] Packet The pointer to the received packet.
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| 129 | @param[in] Len The length of the packet.
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| 130 | @param[out] UdpPacket The net buf of received packet.
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| 131 | @param[out] IsCompleted If TRUE, the upload has been completed.
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| 132 | Otherwise, the upload has not been completed.
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| 133 |
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| 134 | @retval EFI_SUCCESS The ACK packet successfully processed.
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| 135 | @retval EFI_TFTP_ERROR The block number loops back.
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| 136 | @retval Others Failed to transmit the next data packet.
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| 137 |
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| 138 | **/
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| 139 | EFI_STATUS
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| 140 | Mtftp6WrqHandleAck (
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| 141 | IN MTFTP6_INSTANCE *Instance,
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| 142 | IN EFI_MTFTP6_PACKET *Packet,
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| 143 | IN UINT32 Len,
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| 144 | OUT NET_BUF **UdpPacket,
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| 145 | OUT BOOLEAN *IsCompleted
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| 146 | )
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| 147 | {
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| 148 | UINT16 AckNum;
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| 149 | INTN Expected;
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| 150 | UINT64 BlockCounter;
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| 151 |
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| 152 | *IsCompleted = FALSE;
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| 153 | AckNum = NTOHS (Packet->Ack.Block[0]);
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| 154 | Expected = Mtftp6GetNextBlockNum (&Instance->BlkList);
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| 155 |
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| 156 | ASSERT (Expected >= 0);
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| 157 |
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| 158 | //
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| 159 | // Get an unwanted ACK, return EFI_SUCCESS to let Mtftp6WrqInput
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| 160 | // restart receive.
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| 161 | //
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| 162 | if (Expected != AckNum) {
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| 163 | return EFI_SUCCESS;
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| 164 | }
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| 165 |
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| 166 | //
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| 167 | // Remove the acked block number, if this is the last block number,
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| 168 | // tell the Mtftp6WrqInput to finish the transfer. This is the last
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| 169 | // block number if the block range are empty.
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| 170 | //
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| 171 | Mtftp6RemoveBlockNum (&Instance->BlkList, AckNum, *IsCompleted, &BlockCounter);
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| 172 |
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| 173 | Expected = Mtftp6GetNextBlockNum (&Instance->BlkList);
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| 174 |
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| 175 | if (Expected < 0) {
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| 176 | //
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| 177 | // The block range is empty. It may either because the last
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| 178 | // block has been ACKed, or the sequence number just looped back,
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| 179 | // that is, there is more than 0xffff blocks.
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| 180 | //
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| 181 | if (Instance->LastBlk == AckNum) {
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| 182 | ASSERT (Instance->LastBlk >= 1);
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| 183 | *IsCompleted = TRUE;
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| 184 | return EFI_SUCCESS;
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| 185 |
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| 186 | } else {
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| 187 | //
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| 188 | // Free the received packet before send new packet in ReceiveNotify,
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| 189 | // since the udpio might need to be reconfigured.
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| 190 | //
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| 191 | NetbufFree (*UdpPacket);
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| 192 | *UdpPacket = NULL;
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| 193 | //
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| 194 | // Send the Mtftp6 error message if block number rolls back.
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| 195 | //
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| 196 | Mtftp6SendError (
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| 197 | Instance,
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| 198 | EFI_MTFTP6_ERRORCODE_REQUEST_DENIED,
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| 199 | (UINT8 *) "Block number rolls back, not supported, try blksize option"
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| 200 | );
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| 201 |
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| 202 | return EFI_TFTP_ERROR;
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| 203 | }
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| 204 | }
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| 205 |
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| 206 | //
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| 207 | // Free the receive buffer before send new packet since it might need
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| 208 | // reconfigure udpio.
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| 209 | //
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| 210 | NetbufFree (*UdpPacket);
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| 211 | *UdpPacket = NULL;
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| 212 |
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| 213 | return Mtftp6WrqSendBlock (Instance, (UINT16) Expected);
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| 214 | }
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| 215 |
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| 216 |
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| 217 | /**
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| 218 | Check whether the received OACK is valid. The OACK is valid
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| 219 | only if:
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| 220 | 1. It only include options requested by us.
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| 221 | 2. It can only include a smaller block size.
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| 222 | 3. It can't change the proposed time out value.
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| 223 | 4. Other requirements of the individal MTFTP6 options as required.
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| 224 |
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| 225 | @param[in] ReplyInfo The pointer to options information in reply packet.
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| 226 | @param[in] RequestInfo The pointer to requested options information.
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| 227 |
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| 228 | @retval TRUE If the option in OACK is valid.
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| 229 | @retval FALSE If the option is invalid.
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| 230 |
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| 231 | **/
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| 232 | BOOLEAN
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| 233 | Mtftp6WrqOackValid (
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| 234 | IN MTFTP6_EXT_OPTION_INFO *ReplyInfo,
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| 235 | IN MTFTP6_EXT_OPTION_INFO *RequestInfo
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| 236 | )
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| 237 | {
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| 238 | //
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| 239 | // It is invalid for server to return options we don't request
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| 240 | //
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| 241 | if ((ReplyInfo->BitMap & ~RequestInfo->BitMap) != 0) {
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| 242 | return FALSE;
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| 243 | }
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| 244 |
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| 245 | //
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| 246 | // Server can only specify a smaller block size to be used and
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| 247 | // return the timeout matches that requested.
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| 248 | //
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| 249 | if ((((ReplyInfo->BitMap & MTFTP6_OPT_BLKSIZE_BIT) != 0) && (ReplyInfo->BlkSize > RequestInfo->BlkSize)) ||
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| 250 | (((ReplyInfo->BitMap & MTFTP6_OPT_TIMEOUT_BIT) != 0) && (ReplyInfo->Timeout != RequestInfo->Timeout))
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| 251 | ) {
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| 252 |
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| 253 | return FALSE;
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| 254 | }
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| 255 |
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| 256 | return TRUE;
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| 257 | }
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| 258 |
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| 259 |
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| 260 | /**
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| 261 | Process the OACK packet for Wrq.
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| 262 |
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| 263 | @param[in] Instance The pointer to the Mtftp6 instance.
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| 264 | @param[in] Packet The pointer to the received packet.
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| 265 | @param[in] Len The length of the packet.
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| 266 | @param[out] UdpPacket The net buf of received packet.
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| 267 | @param[out] IsCompleted If TRUE, the upload has been completed.
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| 268 | Otherwise, the upload has not been completed.
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| 269 |
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| 270 | @retval EFI_SUCCESS The OACK packet successfully processed.
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| 271 | @retval EFI_TFTP_ERROR An TFTP communication error happened.
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| 272 | @retval Others Failed to process the OACK packet.
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| 273 |
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| 274 | **/
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| 275 | EFI_STATUS
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| 276 | Mtftp6WrqHandleOack (
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| 277 | IN MTFTP6_INSTANCE *Instance,
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| 278 | IN EFI_MTFTP6_PACKET *Packet,
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| 279 | IN UINT32 Len,
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| 280 | OUT NET_BUF **UdpPacket,
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| 281 | OUT BOOLEAN *IsCompleted
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| 282 | )
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| 283 | {
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| 284 | EFI_MTFTP6_OPTION *Options;
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| 285 | UINT32 Count;
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| 286 | MTFTP6_EXT_OPTION_INFO ExtInfo;
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| 287 | EFI_MTFTP6_PACKET Dummy;
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| 288 | EFI_STATUS Status;
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| 289 | INTN Expected;
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| 290 |
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| 291 | *IsCompleted = FALSE;
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| 292 | Options = NULL;
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| 293 |
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| 294 | //
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| 295 | // Ignore the OACK if already started the upload
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| 296 | //
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| 297 | Expected = Mtftp6GetNextBlockNum (&Instance->BlkList);
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| 298 |
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| 299 | if (Expected != 0) {
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| 300 | return EFI_SUCCESS;
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| 301 | }
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| 302 |
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| 303 | //
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| 304 | // Parse and validate the options from server
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| 305 | //
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| 306 | ZeroMem (&ExtInfo, sizeof (MTFTP6_EXT_OPTION_INFO));
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| 307 |
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| 308 | Status = Mtftp6ParseStart (Packet, Len, &Count, &Options);
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| 309 |
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| 310 | if (EFI_ERROR (Status)) {
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| 311 | return Status;
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| 312 | }
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| 313 | ASSERT (Options != NULL);
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| 314 |
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| 315 | Status = Mtftp6ParseExtensionOption (Options, Count, FALSE, Instance->Operation, &ExtInfo);
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| 316 |
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| 317 | if (EFI_ERROR(Status) || !Mtftp6WrqOackValid (&ExtInfo, &Instance->ExtInfo)) {
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| 318 | //
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| 319 | // Don't send a MTFTP error packet when out of resource, it can
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| 320 | // only make it worse.
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| 321 | //
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| 322 | if (Status != EFI_OUT_OF_RESOURCES) {
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| 323 | //
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| 324 | // Free the received packet before send new packet in ReceiveNotify,
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| 325 | // since the udpio might need to be reconfigured.
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| 326 | //
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| 327 | NetbufFree (*UdpPacket);
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| 328 | *UdpPacket = NULL;
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| 329 | //
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| 330 | // Send the Mtftp6 error message if invalid Oack packet received.
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| 331 | //
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| 332 | Mtftp6SendError (
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| 333 | Instance,
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| 334 | EFI_MTFTP6_ERRORCODE_ILLEGAL_OPERATION,
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| 335 | (UINT8 *) "Malformatted OACK packet"
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| 336 | );
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| 337 | }
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| 338 |
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| 339 | return EFI_TFTP_ERROR;
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| 340 | }
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| 341 |
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| 342 | if (ExtInfo.BlkSize != 0) {
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| 343 | Instance->BlkSize = ExtInfo.BlkSize;
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| 344 | }
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| 345 |
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| 346 | if (ExtInfo.Timeout != 0) {
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| 347 | Instance->Timeout = ExtInfo.Timeout;
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| 348 | }
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| 349 |
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| 350 | //
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| 351 | // Build a bogus ACK0 packet then pass it to the Mtftp6WrqHandleAck,
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| 352 | // which will start the transmission of the first data block.
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| 353 | //
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| 354 | Dummy.Ack.OpCode = HTONS (EFI_MTFTP6_OPCODE_ACK);
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| 355 | Dummy.Ack.Block[0] = 0;
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| 356 |
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| 357 | return Mtftp6WrqHandleAck (
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| 358 | Instance,
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| 359 | &Dummy,
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| 360 | sizeof (EFI_MTFTP6_ACK_HEADER),
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| 361 | UdpPacket,
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| 362 | IsCompleted
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| 363 | );
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| 364 | }
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| 365 |
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| 366 |
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| 367 | /**
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| 368 | The packet process callback for Mtftp6 upload.
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| 369 |
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| 370 | @param[in] UdpPacket The pointer to the packet received.
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| 371 | @param[in] UdpEpt The pointer to the Udp6 access point.
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| 372 | @param[in] IoStatus The status from Udp6 instance.
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| 373 | @param[in] Context The pointer to the context.
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| 374 |
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| 375 | **/
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| 376 | VOID
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| 377 | EFIAPI
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| 378 | Mtftp6WrqInput (
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| 379 | IN NET_BUF *UdpPacket,
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| 380 | IN UDP_END_POINT *UdpEpt,
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| 381 | IN EFI_STATUS IoStatus,
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| 382 | IN VOID *Context
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| 383 | )
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| 384 | {
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| 385 | MTFTP6_INSTANCE *Instance;
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| 386 | EFI_MTFTP6_PACKET *Packet;
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| 387 | BOOLEAN IsCompleted;
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| 388 | EFI_STATUS Status;
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| 389 | UINT32 TotalNum;
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| 390 | UINT32 Len;
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| 391 | UINT16 Opcode;
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| 392 |
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| 393 | Instance = (MTFTP6_INSTANCE *) Context;
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| 394 |
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| 395 | NET_CHECK_SIGNATURE (Instance, MTFTP6_INSTANCE_SIGNATURE);
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| 396 |
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| 397 | IsCompleted = FALSE;
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| 398 | Packet = NULL;
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| 399 | Status = EFI_SUCCESS;
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| 400 | TotalNum = 0;
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| 401 |
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| 402 | //
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| 403 | // Return error status if Udp6 instance failed to receive.
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| 404 | //
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| 405 | if (EFI_ERROR (IoStatus)) {
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| 406 | Status = IoStatus;
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| 407 | goto ON_EXIT;
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| 408 | }
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| 409 |
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| 410 | ASSERT (UdpPacket != NULL);
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| 411 |
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| 412 | if (UdpPacket->TotalSize < MTFTP6_OPCODE_LEN) {
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| 413 | goto ON_EXIT;
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| 414 | }
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| 415 |
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| 416 | //
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| 417 | // Client send initial request to server's listening port. Server
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| 418 | // will select a UDP port to communicate with the client.
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| 419 | //
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| 420 | if (UdpEpt->RemotePort != Instance->ServerDataPort) {
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| 421 | if (Instance->ServerDataPort != 0) {
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| 422 | goto ON_EXIT;
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| 423 | } else {
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| 424 | Instance->ServerDataPort = UdpEpt->RemotePort;
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| 425 | }
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| 426 | }
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| 427 |
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| 428 | //
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| 429 | // Copy the MTFTP packet to a continuous buffer if it isn't already so.
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| 430 | //
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| 431 | Len = UdpPacket->TotalSize;
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| 432 | TotalNum = UdpPacket->BlockOpNum;
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| 433 |
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| 434 | if (TotalNum > 1) {
|
|---|
| 435 | Packet = AllocateZeroPool (Len);
|
|---|
| 436 |
|
|---|
| 437 | if (Packet == NULL) {
|
|---|
| 438 | Status = EFI_OUT_OF_RESOURCES;
|
|---|
| 439 | goto ON_EXIT;
|
|---|
| 440 | }
|
|---|
| 441 |
|
|---|
| 442 | NetbufCopy (UdpPacket, 0, Len, (UINT8 *) Packet);
|
|---|
| 443 |
|
|---|
| 444 | } else {
|
|---|
| 445 | Packet = (EFI_MTFTP6_PACKET *) NetbufGetByte (UdpPacket, 0, NULL);
|
|---|
| 446 | ASSERT (Packet != NULL);
|
|---|
| 447 | }
|
|---|
| 448 |
|
|---|
| 449 | Opcode = NTOHS (Packet->OpCode);
|
|---|
| 450 |
|
|---|
| 451 | //
|
|---|
| 452 | // Callback to the user's CheckPacket if provided. Abort the transmission
|
|---|
| 453 | // if CheckPacket returns an EFI_ERROR code.
|
|---|
| 454 | //
|
|---|
| 455 | if (Instance->Token->CheckPacket != NULL &&
|
|---|
| 456 | (Opcode == EFI_MTFTP6_OPCODE_OACK || Opcode == EFI_MTFTP6_OPCODE_ERROR)
|
|---|
| 457 | ) {
|
|---|
| 458 |
|
|---|
| 459 | Status = Instance->Token->CheckPacket (
|
|---|
| 460 | &Instance->Mtftp6,
|
|---|
| 461 | Instance->Token,
|
|---|
| 462 | (UINT16) Len,
|
|---|
| 463 | Packet
|
|---|
| 464 | );
|
|---|
| 465 |
|
|---|
| 466 | if (EFI_ERROR (Status)) {
|
|---|
| 467 | //
|
|---|
| 468 | // Send an error message to the server to inform it
|
|---|
| 469 | //
|
|---|
| 470 | if (Opcode != EFI_MTFTP6_OPCODE_ERROR) {
|
|---|
| 471 | //
|
|---|
| 472 | // Free the received packet before send new packet in ReceiveNotify,
|
|---|
| 473 | // since the udpio might need to be reconfigured.
|
|---|
| 474 | //
|
|---|
| 475 | NetbufFree (UdpPacket);
|
|---|
| 476 | UdpPacket = NULL;
|
|---|
| 477 | //
|
|---|
| 478 | // Send the Mtftp6 error message if user aborted the current session.
|
|---|
| 479 | //
|
|---|
| 480 | Mtftp6SendError (
|
|---|
| 481 | Instance,
|
|---|
| 482 | EFI_MTFTP6_ERRORCODE_REQUEST_DENIED,
|
|---|
| 483 | (UINT8 *) "User aborted the transfer"
|
|---|
| 484 | );
|
|---|
| 485 | }
|
|---|
| 486 |
|
|---|
| 487 | Status = EFI_ABORTED;
|
|---|
| 488 | goto ON_EXIT;
|
|---|
| 489 | }
|
|---|
| 490 | }
|
|---|
| 491 |
|
|---|
| 492 | //
|
|---|
| 493 | // Switch the process routines by the operation code.
|
|---|
| 494 | //
|
|---|
| 495 | switch (Opcode) {
|
|---|
| 496 | case EFI_MTFTP6_OPCODE_ACK:
|
|---|
| 497 | if (Len != MTFTP6_OPCODE_LEN + MTFTP6_BLKNO_LEN) {
|
|---|
| 498 | goto ON_EXIT;
|
|---|
| 499 | }
|
|---|
| 500 | //
|
|---|
| 501 | // Handle the Ack packet of Wrq.
|
|---|
| 502 | //
|
|---|
| 503 | Status = Mtftp6WrqHandleAck (Instance, Packet, Len, &UdpPacket, &IsCompleted);
|
|---|
| 504 | break;
|
|---|
| 505 |
|
|---|
| 506 | case EFI_MTFTP6_OPCODE_OACK:
|
|---|
| 507 | if (Len <= MTFTP6_OPCODE_LEN) {
|
|---|
| 508 | goto ON_EXIT;
|
|---|
| 509 | }
|
|---|
| 510 | //
|
|---|
| 511 | // Handle the Oack packet of Wrq.
|
|---|
| 512 | //
|
|---|
| 513 | Status = Mtftp6WrqHandleOack (Instance, Packet, Len, &UdpPacket, &IsCompleted);
|
|---|
| 514 | break;
|
|---|
| 515 |
|
|---|
| 516 | default:
|
|---|
| 517 | //
|
|---|
| 518 | // Drop and return eror if received error message.
|
|---|
| 519 | //
|
|---|
| 520 | Status = EFI_TFTP_ERROR;
|
|---|
| 521 | break;
|
|---|
| 522 | }
|
|---|
| 523 |
|
|---|
| 524 | ON_EXIT:
|
|---|
| 525 | //
|
|---|
| 526 | // Free the resources, then if !EFI_ERROR (Status) and not completed,
|
|---|
| 527 | // restart the receive, otherwise end the session.
|
|---|
| 528 | //
|
|---|
| 529 | if (Packet != NULL && TotalNum > 1) {
|
|---|
| 530 | FreePool (Packet);
|
|---|
| 531 | }
|
|---|
| 532 |
|
|---|
| 533 | if (UdpPacket != NULL) {
|
|---|
| 534 | NetbufFree (UdpPacket);
|
|---|
| 535 | }
|
|---|
| 536 |
|
|---|
| 537 | if (!EFI_ERROR (Status) && !IsCompleted) {
|
|---|
| 538 | Status = UdpIoRecvDatagram (
|
|---|
| 539 | Instance->UdpIo,
|
|---|
| 540 | Mtftp6WrqInput,
|
|---|
| 541 | Instance,
|
|---|
| 542 | 0
|
|---|
| 543 | );
|
|---|
| 544 | }
|
|---|
| 545 | //
|
|---|
| 546 | // Clean up the current session if failed to continue.
|
|---|
| 547 | //
|
|---|
| 548 | if (EFI_ERROR (Status) || IsCompleted) {
|
|---|
| 549 | Mtftp6OperationClean (Instance, Status);
|
|---|
| 550 | }
|
|---|
| 551 | }
|
|---|
| 552 |
|
|---|
| 553 |
|
|---|
| 554 | /**
|
|---|
| 555 | Start the Mtftp6 instance to upload. It will first init some states,
|
|---|
| 556 | then send the WRQ request packet, and start to receive the packet.
|
|---|
| 557 |
|
|---|
| 558 | @param[in] Instance The pointer to the Mtftp6 instance.
|
|---|
| 559 | @param[in] Operation The operation code of the current packet.
|
|---|
| 560 |
|
|---|
| 561 | @retval EFI_SUCCESS The Mtftp6 was started to upload.
|
|---|
| 562 | @retval Others Failed to start to upload.
|
|---|
| 563 |
|
|---|
| 564 | **/
|
|---|
| 565 | EFI_STATUS
|
|---|
| 566 | Mtftp6WrqStart (
|
|---|
| 567 | IN MTFTP6_INSTANCE *Instance,
|
|---|
| 568 | IN UINT16 Operation
|
|---|
| 569 | )
|
|---|
| 570 | {
|
|---|
| 571 | EFI_STATUS Status;
|
|---|
| 572 |
|
|---|
| 573 | //
|
|---|
| 574 | // The valid block number range are [0, 0xffff]. For example:
|
|---|
| 575 | // the client sends an WRQ request to the server, the server
|
|---|
| 576 | // ACK with an ACK0 to let client start transfer the first
|
|---|
| 577 | // packet.
|
|---|
| 578 | //
|
|---|
| 579 | Status = Mtftp6InitBlockRange (&Instance->BlkList, 0, 0xffff);
|
|---|
| 580 |
|
|---|
| 581 | if (EFI_ERROR (Status)) {
|
|---|
| 582 | return Status;
|
|---|
| 583 | }
|
|---|
| 584 |
|
|---|
| 585 | Status = Mtftp6SendRequest (Instance, Operation);
|
|---|
| 586 |
|
|---|
| 587 | if (EFI_ERROR (Status)) {
|
|---|
| 588 | return Status;
|
|---|
| 589 | }
|
|---|
| 590 |
|
|---|
| 591 | return UdpIoRecvDatagram (
|
|---|
| 592 | Instance->UdpIo,
|
|---|
| 593 | Mtftp6WrqInput,
|
|---|
| 594 | Instance,
|
|---|
| 595 | 0
|
|---|
| 596 | );
|
|---|
| 597 | }
|
|---|
| 598 |
|
|---|
