--- name: "rose" section: "4" platform: "linux" package: "ax25-tools" version: "0.0.10-rc5+git20230513+d3e6d4f-3" release: "Debian 13 (Trixie)" platforms: ["linux"] url: "https://new.carta.tech/rose/4" --- # rose(4) Rose amateur packet radio protocol family ## NAME AF\_ROSE - Rose amateur packet radio protocol family ## DESCRIPTION **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. ## SEE ALSO [**call**(1)](/call/1.md), [**socket**(2)](/socket/2.md), **[setsockopt(2)](/setsockopt/2.md),** **[getsockopt(2)](/getsockopt/2.md),** [**rsports**(5)](/rsports/5.md), [**rsparms**(8)](/rsparms/8.md). ## AUTHOR Jonathan Naylor G4KLX \