User`s guide

216

DAK

KwikNet TCP/IP Sockets

kn_sendto kn_sendto

Purpose Send Data to a Socket

Used by

n Task o ISP o Timer Procedure o Restart Procedure o Exit Procedure

Setup Prototype is in file KN_SOCK.H.

#include "KN_SOCK.H"

int kn_sendto(int s, void *buf, int len, int flags,

struct sockaddr *to, int tolen);

Description S is a socket descriptor identifying the socket to which data is to be sent.

The socket can be connected or unconnected.

Buf is a pointer to the buffer of data to be sent.

Len is the buffer size, measured in bytes.

Flags is a control variable used to modify the send process. Flags is 0 or

the logical OR of any of the following values.

MSG_OOB Allow sending of out-of-band data.

MSG_DONTWAIT Send message in non-blocking fashion.

To is a pointer to the address of the destination to which the data is to be

sent. The format of the IP address in structure sockaddr is described

in header file KN_SOCK.H.

This parameter is required to identify the destination address when

using a connectionless socket such as that used for UDP datagrams on a

socket of type SOCK_DGRAM. The format of the address is compatible

with that received by procedure kn_recvfrom().

Tolen is the length of the destination address.

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