NETROM(4) - Linux man page online | Special files

NET/ROM amateur packet radio protocol family.

25 July 1996
NETROM(4) Linux Programmer's Manual NETROM(4)


AF_NETROM - NET/ROM amateur packet radio protocol family


NET/ROM is a protocol used extensively by radio amateurs. The Linux NET/ROM protocol fam‐ ily permits access to these protocols via the standard 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.


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


Jonathan Naylor G4KLX <>
Linux 25 July 1996 NETROM(4)
This manual Reference Other manuals
netrom(4) referred by ax25(3) | ax25_call(8) | ax25d(8) | ax25d.conf(5) | ax25ipd(8) | axcall(1) | axlisten(1) | netromd(8) | nodesave(8) | nrattach(8) | nrbroadcast(5) | nrparms(8) | nrports(5) | rose(3)
refer to getsockopt(2) | netromd(8) | nodesave(8) | nrbroadcast(5) | nrparms(8) | nrports(5) | socket(2)
Download raw manual
Index Linux Programmer's Manual (+2508) Linux (+1529) № 4 (+981)
Go top