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git.proxmox.com Git - mirror_edk2.git/blob - StdLib/BsdSocketLib/read.c
2 Implement the read API.
4 Copyright (c) 2011, Intel Corporation
5 All rights reserved. This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
15 #include <SocketInternals.h>
19 Read support routine for sockets
21 The BslSocketRead routine is called indirectly by the read file
22 system routine. This routine is typically used for SOCK_STREAM
23 because it waits for receive data from the target system specified
24 in the ::connect call.
26 @param [in] pDescriptor Descriptor address for the file
27 @param [in] pOffset File offset
28 @param [in] LengthInBytes Number of bytes to read
29 @param [in] pBuffer Address of the buffer to receive the data
31 @return The number of bytes read or -1 if an error occurs.
32 In the case of an error, ::errno contains more details.
38 struct __filedes
*pDescriptor
,
47 // Receive the data from the remote system
49 BytesRead
= recvfrom ( pDescriptor
->MyFD
,
57 // Return the number of bytes read