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       AF_ROSE - Rose amateur packet radio protocol family


       Rose  is  a protocol used extensively by radio amateurs. The Linux Rose
       protocol family permits access to  these  protocols  via  the  standard
       networking socket metaphor.

       The Rose protocol layer only supports connected mode.

       The only mode of operation is connected mode which is the mode used for
       a socket of type SOCK_SEQPACKET (stream sockets are  not  available  in
       Rose).   This  requires  that  the user ensures output data is suitably
       packetised, and that input data is read a  packet  at  a  time  into  a
       buffer of suitable size.

       Rose  addresses  consist  of  10  digits.  These  are  encoded  into  a
       sockaddr_rose structure which is provided to the relevant system calls.

       Rose  has  some  unusual  properties. Notably in a multi-user system an
       AX.25 address is often associated with a user, and some users  may  not
       have  such  an association. a set of ioctl calls are provided to manage
       an association table.

       Rose supports the following socket options for SOL_ROSE. ROSE_T1 is the
       T11/T21  timer  in 1/10ths of a second, ROSE_T2 is the T12/T22 timer in
       1/10ths of a second. ROSE_T3, is the T13/T23  timer  in  1/10ths  of  a
       second.   It  is  possible  for an application to request that the Rose
       layer return the Rose header as well as the application data,  this  is
       done via the ROSE_HDRINCL socket option.


       call(1), socket(2), setsockopt(2), getsockopt(2), rsports(5), rsctl(8),


       Jonathan Naylor G4KLX <>