NAME

       socket_connect6 - attempt to make a TCP connection

SYNTAX

       #include <libowfat/socket.h>

       int socket_connect6(int s, const char ip[16],
                           uint16 port,uint32 scope_id);

DESCRIPTION

       socket_connect6  attempts  to  make  a connection from TCP socket s to TCP port port on IP
       address ip.

       The meaning of scope_id is dependent on the implementation and  IPv6  IP.   On  link-local
       IPv6  addresses  it  specifies the outgoing interface index.  The name (e.g. "eth0") for a
       given interface index can be queried with getifname.  scope_id should normally be  set  to
       0.

       socket_connect6 may return

       •      0,  to  indicate  that  the connection succeeded (and succeeded immediately, if the
              socket is non-blocking)

       •      -1, setting errno to error_inprogress or error_wouldblock,  to  indicate  that  the
              socket is non-blocking

       •      -1,  setting  errno  to something else, to indicate that the connection failed (and
              failed immediately, if the socket is non-blocking).

       When a  background  connection  succeeds  or  fails,  s  becomes  writable;  you  can  use
       socket_connected  to  see  whether  the  connection  succeeded.  If the connection failed,
       socket_connected returns 0, setting errno appropriately.

       Once a TCP socket is connected, you can use the read and write system  calls  to  transmit
       data.

       You  can  call socket_connect6 without calling socket_bind6.  This has the effect as first
       calling socket_bind6 with IP address :: and port 0.

EXAMPLE

         #include <libowfat/socket.h>

         int s;
         char ip[16];
         uint16 p;

         s = socket_tcp6();
         socket_bind6(s,ip,p);
         socket_connect6(s,ip,p,0);

SEE ALSO

       socket_connect4(3), socket_fastopen_connect6(3), socket_getifname(3)

                                                                               socket_connect6(3)