.TH socket_send4 3
.SH NAME
socket_send4 \- send a UDP datagram
.SH SYNTAX
.B #include <libowfat/socket.h>

ssize_t \fBsocket_send4\fP(int \fIs\fR, const char* \fIbuf\fR, size_t \fIlen\fR,
                     const char \fIip\fR[4],uint16 \fIport\fR);
.SH DESCRIPTION
socket_send4 sends \fIlen\fR bytes starting at \fIbuf\fR in a UDP
datagram over the socket \fIs\fR to UDP port \fIport\fR on IP address
\fIip\fR.

You can call socket_send4 without calling socket_bind4.  This has the
effect as first calling socket_bind4 with IP address 0.0.0.0 and port 0.
.SH RETURN VALUE
socket_send4 returns 0 if the datagram was sent successfully.  If not,
it returns -1 and sets errno appropriately.
.SH EXAMPLE
  #include <libowfat/socket.h>

  int \fIs\fR;
  char \fIip\fR[4];
  uint16 \fIp\fR;

  \fIs\fR = socket_tcp4();
  socket_bind4(s,ip,p);
  socket_send4(s,"hello, world",12,ip,p);

.SH "SEE ALSO"
socket_send6(3)