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NAME

     udplite — Lightweight User Datagram Protocol

SYNOPSIS

     #include <sys/types.h>
     #include <sys/socket.h>
     #include <netinet/udplite.h>

     int
     socket(AF_INET, SOCK_DGRAM, IPPROTO_UDPLITE);

DESCRIPTION

     The UDP-Lite protocol provides a partial checksum which allows corrupted packets to be transmitted to the
     receiving application.  This has advantages for some types of multimedia transport that may be able to make
     use of slightly damaged datagrams, rather than having them discarded by lower-layer protocols.

     UDP-Lite supports a number of socket options which can be set with setsockopt(2) and tested with
     getsockopt(2):

     UDPLITE_SEND_CSCOV  This option sets the sender checksum coverage.  A value of zero indicates that all sent
                         packets will have full checksum coverage.  A value of 8 to 65535 limits the checksum
                         coverage of all sent packets to the value given.

     UDPLITE_RECV_CSCOV  This option is the receiver-side analogue.  A value of zero instructs the kernel to
                         drop all received packets not having full checksum coverage.  A value of 8 to 65535
                         instructs the kernel to drop all received packets with a partial checksum coverage
                         smaller than the value specified.

ERRORS

     A socket operation may fail with one of the following errors returned:

     [EISCONN]          when trying to establish a connection on a socket which already has one, or when trying
                        to send a datagram with the destination address specified and the socket is already
                        connected;

     [ENOTCONN]         when trying to send a datagram, but no destination address is specified, and the socket
                        has not been connected;

     [ENOBUFS]          when the system runs out of memory for an internal data structure;

     [EADDRINUSE]       when an attempt is made to create a socket with a port which has already been allocated;

     [EADDRNOTAVAIL]    when an attempt is made to create a socket with a network address for which no network
                        interface exists.

SEE ALSO

     getsockopt(2), recv(2), send(2), socket(2)