linux/net/rose
Bernard Pidoux fe2c802ab6 rose: improving AX25 routing frames via ROSE network
ROSE network is organized through nodes connected via hamradio or Internet.
AX25 packet radio frames sent to a remote ROSE address destination are routed
through these nodes.

Without the present patch, automatic routing mechanism did not work optimally
due to an improper parameter checking.

rose_get_neigh() function is called either by rose_connect() or by
rose_route_frame().

In the case of a call from rose_connect(), f0 timer is checked to find if a connection
is already pending. In that case it returns the address of the neighbour, or returns a NULL otherwise.

When called by rose_route_frame() the purpose was to route a packet AX25 frame
through an adjacent node given a destination rose address.
However, in that case, t0 timer checked does not indicate if the adjacent node
is actually connected even if the timer is not null. Thus, for each frame sent, the
function often tried to start a new connexion even if the adjacent node was already connected.

The patch adds a "new" parameter that is true when the function is called by
rose route_frame().
This instructs rose_get_neigh() to check node parameter "restarted". 
If restarted is true it means that the route to the destination address is opened via a neighbour
node already connected.
If "restarted" is false the function returns a NULL.
In that case the calling function will initiate a new connection as before.

This results in a fast routing of frames, from nodes to nodes, until
destination is reached, as originaly specified by ROSE protocole.

Signed-off-by: Bernard Pidoux <f6bvp@amsat.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-06-17 17:08:32 -07:00
..
Makefile Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
af_rose.c rose: improving AX25 routing frames via ROSE network 2008-06-17 17:08:32 -07:00
rose_dev.c [ROSE]: Trivial compilation CONFIG_INET=n case 2007-12-05 05:37:28 -08:00
rose_in.c [ROSE]: Supress sparse warnings 2008-01-28 15:02:44 -08:00
rose_link.c [ROSE]: Eleminate HZ from ROSE kernel interfaces 2006-05-03 23:28:20 -07:00
rose_loopback.c [ROSE]: Fix rose.ko oops on unload 2007-10-07 23:44:17 -07:00
rose_out.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
rose_route.c rose: improving AX25 routing frames via ROSE network 2008-06-17 17:08:32 -07:00
rose_subr.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
rose_timer.c [ROSE]: rose_heartbeat_expiry() locking fix 2005-10-31 16:41:45 -02:00
sysctl_net_rose.c [NET]: Simple ctl_table to ctl_path conversions. 2008-01-28 15:01:07 -08:00