send Function
C
int send(
SOCKET s,
const char* buf,
int len,
int flags
);
Description
The send() function is used to send outgoing data on an already connected socket. This function is used to send a reliable, ordered stream of data bytes on a socket of type SOCK_STREAM but cal also be used to send datagrams on a socket of type SOCK_DGRAM.
Preconditions
The connect() function should be called for TCP and UDP sockets. Server side, accept() 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). |
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.
A value of zero indicates no data sent.
Remarks
None.