Syntax
short RecvfromSc(
SOCKET sock,
void *pvRecvBuf,
unsigned short u16BufLen,
unsigned long u32Timeoutmsec
);
Parameters
- sock
-
[in] Socket descriptor
- pvRecvBuf
-
[out] Specify the receive buffer.
- u16BufLen
- Specify the receive buffer size.
- u32Timeoutmsec
- [in] Specify the timeout (msec). If you specify 0 or 4294967295 (0xFFFFFFFF), it will not time out.
Return value
The following values will be returned.| Value | Description |
|---|---|
| SOCK_ERR_NO_ERROR | Succeeded |
| M2M_ERR_SLEEP_FAIL | Initialize with SysWLANInit function. |
| Other than the above | Failed |
Remarks
Receive using UDP socket.Only available on UDP sockets.
The processing request of this function is processed asynchronously. The processing result is received by the callback function specified by the pfAppSocketCb parameter of the RegSocketCallbackSc function. The following values are passed to the parameters of the callback function.
- sock
- Socket descriptor
- u8Msg
- SOCKET_MSG_RECVFROM
- pvMsg
- A pointer to the tstrSocketRecvMsg structure that stores the processing result.
tstrSocketRecvMsg structure (typedef)
Syntax
typedef struct
{
unsigned char *pu8Buffer;
short s16BufferSize;
unsigned short u16RemainingSize;
struct sockaddr_in strRemoteAddr;
} tstrSocketRecvMsg;
Members
- pu8Buffer
- Buffer specified by RecvfromSc function. (This may be NULL when the function fails, .)
- s16BufferSize
-
Received data size or error:
Value Description Received data size Succeeded Larger than the buffer size Failed Less than or equal to 0 Failed - u16RemainingSize
- Remaining size of received data.
- strRemoteAddr
- Returns the remote socket address with sockaddr_in structure.
Requirements
Header file:
lib.hLibrary file:
libSTARTUPOPH5000.a
Last updated: 2020/11/26