diff options
| author | Ruben Wisniewski <[email protected]> | 2015-06-16 21:06:23 +0200 |
|---|---|---|
| committer | Antonio Quartulli <[email protected]> | 2015-08-11 18:10:04 +0200 |
| commit | 571a963768e7711e0bb5a30f71247b46ec9ca7b9 (patch) | |
| tree | 0dc9d00a5c8c27847ff5e92ad0a51ec5bbb2eb2f /tools/perf/scripts/python | |
| parent | e071d93eb40c969dc8c578dde5ddd89a30fb01cb (diff) | |
batman-adv: Avoid u32 overflow during gateway select
The gateway selection based on fast connections is using a single value
calculated from the average tq (0-255) and the download bandwidth (in
100Kibit). The formula for the first step (tq ** 2 * 10000 * bandwidth)
tends to overflow a u32 with low bandwidth settings like 50 [100KiBit]
and a tq value of over 92.
Changing this to a 64 bit unsigned integer allows to support a
bandwidth_down with up to ~2.8e10 [100KiBit] and a perfect tq of 255. This
is ~6.6 times higher than the maximum possible value of the gateway
announcement TVLV.
This problem only affects the non-default gw_sel_class 1.
Signed-off-by: Ruben Wisniewsi <[email protected]>
[[email protected]: rewritten commit message]
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Marek Lindner <[email protected]>
Signed-off-by: Antonio Quartulli <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions