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