send Function

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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 can also be used to send datagrams on a socket of type SOCK_DGRAM.

Preconditions

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 a previous call to socket. 
buf 
application data buffer containing data to transmit. 
len 
length of data in bytes. 
flags 
message flags. Currently this field is not supported. 
Returns

On success, send returns number of bytes sent. In case of error, returns SOCKET_ERROR. a zero indicates no data send.

Remarks

None.

Stack API > BSD Sockets > Public Members > send Function
Microchip TCP/IP Stack 5.42.08 - June 15, 2013
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