1.2.1.2.67 sendto Function
C
int sendto( SOCKET s, const char* buf, int len, int flags, const struct sockaddr* to, int tolen );
Description
This function is used to send outgoing data on a socket. The destination address is given by to and tolen. Both datagram and stream sockets are supported.
Preconditions
The socket() function should be called.
Parameters
| Parameters | Description |
|---|---|
| s | Socket descriptor returned from previous call to socket(). |
| buf | Application data buffer containing data to transmit. |
| len | Length of data in bytes. |
| flags | Message flags (currently this is not supported). |
| to | Optional pointer to the sockaddr structure containing the destination address. If NULL, the currently bound remote port and IP address are used as the destination. |
| tolen | Length of the sockaddr structure. |
Returns
If the function is successful, the number of bytes sent is returned.
A return value of SOCKET_ERROR (-1) indicates an error and errno is set accordingly.
Remarks
None.