NAME

       AnyEvent::Handle::UDP - client/server UDP handles for AnyEvent

VERSION

       version 0.048

SYNOPSIS

        my $echo_server = AnyEvent::Handle::UDP->new(
            bind => ['0.0.0.0', 4000],
            on_recv => sub {
                my ($data, $ae_handle, $client_addr) = @_;
                $ae_handle->push_send($data, $client_addr);
            },
        );

DESCRIPTION

       This module is an abstraction around UDP sockets for use with AnyEvent.

ATTRIBUTES

   on_recv
       The callback for when a package arrives. It takes three arguments: the datagram, the
       handle and the address the datagram was received from.

   on_error
       The callback for when an error occurs. It takes three arguments: the handle, a boolean
       indicating the error is fatal or not, and the error message.

   on_drain
       This sets the callback that is called when the send buffer becomes empty. The callback
       takes the handle as its only argument.

   autoflush
       Always attempt to send data to the operating system immediately, without waiting for the
       loop to indicate the filehandle is write-ready.

   receive_size
       The buffer size for the receiving in bytes. It defaults to 1500, which is slightly more
       than the MTA on ethernet.

   family
       Sets the socket family. The default is 0, which means either IPv4 or IPv6. The values 4
       and 6 mean IPv4 and IPv6 respectively.

   fh
       The underlying filehandle. Note that this doesn't cooperate with the "connect" and "bind"
       parameters.

   reuse_addr
       If true will enable quick reuse of the bound address

   timeout
   rtimeout
   wtimeout
       If non-zero, then these enables an "inactivity" timeout: whenever this many seconds pass
       without a successful read or write on the underlying file handle (or a call to
       "timeout_reset"), the on_timeout callback will be invoked (and if that one is missing, a
       non-fatal ETIMEDOUT error will be raised).

       There are three variants of the timeouts that work independently of each other, for both
       read and write (triggered when nothing was read OR written), just read (triggered when
       nothing was read), and just write: timeout, rtimeout and wtimeout, with corresponding
       callbacks on_timeout, on_rtimeout and on_wtimeout, and reset functions timeout_reset,
       rtimeout_reset, and wtimeout_reset.

       Note that timeout processing is active even when you do not have any outstanding read or
       write requests: If you plan to keep the connection idle then you should disable the
       timeout temporarily or ignore the timeout in the corresponding on_timeout callback, in
       which case AnyEvent::Handle will simply restart the timeout.

       Calling "clear_timeout" (or setting it to zero, which does the same) disables the
       corresponding timeout.

   on_timeout
   on_rtimeout
   on_wtimeout
       The callback that's called whenever the inactivity timeout passes. If you return from this
       callback, then the timeout will be reset as if some activity had happened, so this
       condition is not fatal in any way.

METHODS

   new
       Create a new UDP handle. As arguments it accepts any attribute, as well as these two:

       •   connect

           Set the address to which datagrams are sent by default, and the only address from
           which datagrams are received. It must be either a packed sockaddr struct or an
           arrayref containing a hostname and a portnumber.

       •   bind

           The address to bind the socket to. It must be either a packed sockaddr struct or an
           arrayref containing a hostname and a portnumber.

       All except "on_recv" are optional, though using either "connect" or "bind" (or both) is
       strongly recommended unless you give it a connected/bound "fh".

   bind_to($address)
       Bind to the specified addres. Note that a bound socket may be rebound to another address.
       $address must be in the same form as the bind argument to new.

   connect_to($address)
       Connect to the specified address. Note that a connected socket may be reconnected to
       another address. $address must be in the same form as the connect argument to new.

   push_send($message, $to = undef, $cv = AnyEvent::CondVar->new)
       Try to send a message. If a socket is not connected a receptient address must also be
       given. If it is connected giving a receptient may not work as expected, depending on your
       platform. It returns $cv, which will become true when $message is sent.

   timeout_reset
   rtimeout_reset
   wtimeout_reset
       Reset the activity timeout, as if data was received or sent.

   sockname
       Get the local address, per "getsockname".

   peername
       Get the peer's address, per "getpeername".

   destroy
       Destroy the handle.

BACKWARDS COMPATIBILITY

       This module is not backwards compatible in any way with the defunct previous module of the
       same name by Jan Henning Thorsen.

AUTHOR

       Leon Timmermans <leont@cpan.org>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2011 by Leon Timmermans.

       This is free software; you can redistribute it and/or modify it under the same terms as
       the Perl 5 programming language system itself.