]> git.proxmox.com Git - mirror_edk2.git/blob - StdLib/BsdSocketLib/sendto.c
UefiCpuPkg/MicrocodeUpdateDxe: Fix coding style issues in INF file
[mirror_edk2.git] / StdLib / BsdSocketLib / sendto.c
1 /** @file
2 Implement the sendto API.
3
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
9
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.
12
13 **/
14
15 #include <SocketInternals.h>
16
17
18 /**
19 Send data using a network connection.
20
21 The sendto routine queues data to the network for transmission.
22 This routine is typically used for SOCK_DGRAM sockets that are shared
23 between multiple machine where it is required to specify the target
24 system address when sending the data.
25
26 The
27 <a href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/send.html">POSIX</a>
28 documentation is available online.
29
30 @param [in] s Socket file descriptor returned from ::socket.
31
32 @param [in] buffer Address of a buffer containing the data to send.
33
34 @param [in] length Length of the buffer in bytes.
35
36 @param [in] flags Message control flags
37
38 @param [in] to Remote system address
39
40 @param [in] tolen Length of remote system address structure
41
42 @return This routine returns the number of data bytes that were
43 sent and -1 when an error occurs. In the case of
44 an error, ::errno contains more details.
45
46 **/
47 ssize_t
48 sendto (
49 int s,
50 const void * buffer,
51 size_t length,
52 int flags,
53 const struct sockaddr * to,
54 socklen_t tolen
55 )
56 {
57 BOOLEAN bBlocking;
58 ssize_t LengthInBytes;
59 CONST UINT8 * pData;
60 struct __filedes * pDescriptor;
61 EFI_SOCKET_PROTOCOL * pSocketProtocol;
62 EFI_STATUS Status;
63
64 //
65 // Assume failure
66 //
67 LengthInBytes = -1;
68
69 //
70 // Locate the context for this socket
71 //
72 pSocketProtocol = BslFdToSocketProtocol ( s,
73 &pDescriptor,
74 &errno );
75 if ( NULL != pSocketProtocol ) {
76 //
77 // Determine if the operation is blocking
78 //
79 bBlocking = (BOOLEAN)( 0 == ( pDescriptor->Oflags & O_NONBLOCK ));
80
81 //
82 // Send the data using the socket
83 //
84 pData = buffer;
85 do {
86 errno = 0;
87 Status = pSocketProtocol->pfnTransmit ( pSocketProtocol,
88 flags,
89 length,
90 pData,
91 (size_t *)&LengthInBytes,
92 to,
93 tolen,
94 &errno );
95 if ( EFI_ERROR ( Status ) && ( EFI_NOT_READY != Status )) {
96 LengthInBytes = -1;
97 break;
98 }
99
100 //
101 // Account for the data sent
102 //
103 pData += LengthInBytes;
104 length -= LengthInBytes;
105 } while (( 0 != length ) && ( EFI_NOT_READY == Status ) && bBlocking );
106 }
107
108 //
109 // Return the number of data bytes sent, -1 for errors
110 //
111 return (INT32)LengthInBytes;
112 }