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LEARN ABOUT V7

netrom

NETROM(4)						     Linux Programmer's Manual							 NETROM(4)

NAME

       AF_NETROM - NET/ROM amateur packet radio protocol family

DESCRIPTION

       NET/ROM is a protocol used extensively by radio amateurs. The Linux NET/ROM protocol family permits access to these protocols via the stan-
       dard networking socket metaphor.

       The NET/ROM protocol layer only supports connected mode. IP traffic may be stacked on top of NET/ROM frames using a non-standard  extension
       to the NET/ROM protocol.

       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 NET/ROM).  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.

       NET/ROM	addresses  consist  of	6 ascii characters and a number called the SSID. These are encoded into a sockaddr_ax25 structure which is
       provided to the relevant system calls.

       NET/ROM 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.

       NET/ROM	supports  the following socket options for SOL_NETROM. NETROM_T1 is the T1 timer in 1/10ths of a second, NETROM_T2 is the T2 timer
       in 1/10ths of a second. NETROM_N2, the retry counter is also configurable. There is no 'infinite retry' option  supported  however.  It	is
       possible  for  an application to request that the NET/ROM layer return the NET/ROM header as well as the application data, this is done via
       the NETROM_HDRINCL socket option.

SEE ALSO

       call(1), socket(2), setsockopt(2), getsockopt(2), nrbroadcast(5), nrports(5), netromd(8), noderest(8), nodesave(8), nrparms(8).

AUTHOR

       Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>

Linux								   25 July 1996 							 NETROM(4)

UNIX for Advanced & Expert Users