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    The following form allows you to view linux man pages.

    Command:

    udplite

    
    
    

    SYNOPSIS

           #include <sys/socket.h>
    
           sockfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDPLITE);
    
    
    

    DESCRIPTION

           This  is  an  implementation  of the Lightweight User Datagram Protocol
           (UDP-Lite), as described in RFC 3828.
    
           UDP-Lite is an extension of UDP (RFC 768)  to  support  variable-length
           checksums.   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.
    
           The  variable-length  checksum  coverage  is  set  via  a setsockopt(2)
           option.  If this option is not set, the only difference to  UDP  is  in
           using a different IP protocol identifier (IANA number 136).
    
           The  UDP-Lite  implementation is a full extension of udp(7)--that is, it
           shares the same API and API  behaviour,  and  in  addition  offers  two
           socket options to control the checksum coverage.
    
       Address format
           UDP-Litev4  uses  the  sockaddr_in  address  format described in ip(7).
           UDP-Litev6 uses the sockaddr_in6 address format described in ipv6(7).
    
       Socket options
           To set or get a UDP-Lite socket option, call getsockopt(2) to  read  or
           setsockopt(2) to write the option with the option level argument set to
           IPPROTO_UDPLITE.  In addition, all IPPROTO_UDP socket options are valid
           on a UDP-Lite socket.  See udp(7) for more information.
    
           The following two options are specific to UDP-Lite.
    
           UDPLITE_SEND_CSCOV
                  This  option  sets the sender checksum coverage and takes an int
                  as argument,  with  a  checksum  coverage  value  in  the  range
                  0..2^16-1.
    
                  A  value  of 0 means that the entire datagram is always covered.
                  Values from 1-7 are illegal (RFC 3828, 3.1) and are  rounded  up
                  to the minimum coverage of 8.
    
                  With regard to IPv6 jumbograms (RFC 2675), the UDP-Litev6 check-
                  sum coverage is limited to  the  first  2^16-1  octets,  as  per
                  RFC 3828,  3.5.   Higher values are therefore silently truncated
                  to 2^16-1.  If in doubt, the current coverage value  can  always
                  be queried using getsockopt(2).
    
           UDPLITE_RECV_CSCOV
                  This  is  the  receiver-side analogue and uses the same argument
                  format and value range as UDPLITE_SEND_CSCOV.   This  option  is
    
           /proc/net/snmp - basic UDP-Litev4 statistics counters.
           /proc/net/snmp6 - basic UDP-Litev6 statistics counters.
    
    
    

    VERSIONS

           UDP-Litev4/v6 first appeared in Linux 2.6.20.
    
    
    

    BUGS

           Where glibc support is missing, the following definitions are needed:
    
               #define IPPROTO_UDPLITE     136
               #define UDPLITE_SEND_CSCOV  10
               #define UDPLITE_RECV_CSCOV  11
    
    
    

    SEE ALSO

           ip(7), ipv6(7), socket(7), udp(7)
    
           RFC 3828 for the Lightweight User Datagram Protocol (UDP-Lite).
    
           Documentation/networking/udplite.txt in the Linux kernel source tree
    
    
    

    Linux 2008-12-03 UDPLITE(7)

    
    
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