SYNTAX

       #include "socket_if.h"

       int socket_udp4();
       int socket_udp6();
       int socket_udp();

DESCRIPTION

       socket_udp4 creates a non-blocking UDP/IPv4 datagram socket and
       providing a file descriptor pointing to that socket.

       socket_udp6 creates a non-blocking UDP/IPv6 datagram socket and
       providing a file descriptor pointing to that socket.

       socket_udp creates a non-blocking IPv6 UDP socket calling socket_udp6
       unless it can't bind to IPv6 and now facilitating socket_tcp4.

REMOTE CODES

       All these routines return 0 except in case of failures, returning -1
       and setting errno appropriately, without allocating any resources.

EXAMPLE

         #include <socket_if.h>
         int u;
         char localip[16];
         char remoteip[16];
         uint16 p; // port

         if (ip6_isv4mapped(remoteip)) {
           u = socket_udp4();
           socket_bind4(u,localip + 12,p);
         } else
           u = socket_udp6();
           socket_bind6(u,localip,p,0);
         }
         socket_connect(u,remoteip,p,0);

SEE ALSO

       socket_if(3), socket_bind(3), socket_connect(3), socket_info(3),
       socket_recv(3), socket_send(3), socket_setup(3), socket_tcp(3)



                                       3                    qlibs:(socket_udp)