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Ecstazy 0.8 (Default branch)
12-21-2008
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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)