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git.proxmox.com Git - mirror_edk2.git/blob - StdLib/BsdSocketLib/sendto.c
2 Implement the sendto 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 Send data using a network connection.
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.
27 <a href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/send.html">POSIX</a>
28 documentation is available online.
30 @param [in] s Socket file descriptor returned from ::socket.
32 @param [in] buffer Address of a buffer containing the data to send.
34 @param [in] length Length of the buffer in bytes.
36 @param [in] flags Message control flags
38 @param [in] to Remote system address
40 @param [in] tolen Length of remote system address structure
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.
53 const struct sockaddr
* to
,
58 ssize_t LengthInBytes
;
60 struct __filedes
* pDescriptor
;
61 EFI_SOCKET_PROTOCOL
* pSocketProtocol
;
70 // Locate the context for this socket
72 pSocketProtocol
= BslFdToSocketProtocol ( s
,
75 if ( NULL
!= pSocketProtocol
) {
77 // Determine if the operation is blocking
79 bBlocking
= (BOOLEAN
)( 0 == ( pDescriptor
->Oflags
& O_NONBLOCK
));
82 // Send the data using the socket
87 Status
= pSocketProtocol
->pfnTransmit ( pSocketProtocol
,
91 (size_t *)&LengthInBytes
,
95 if ( EFI_ERROR ( Status
) && ( EFI_NOT_READY
!= Status
)) {
101 // Account for the data sent
103 pData
+= LengthInBytes
;
104 length
-= LengthInBytes
;
105 } while (( 0 != length
) && ( EFI_NOT_READY
== Status
) && bBlocking
);
109 // Return the number of data bytes sent, -1 for errors
111 return (INT32
)LengthInBytes
;