From 6addd50b9dd73c4dd1042a0fac08b1b526c58e78 Mon Sep 17 00:00:00 2001 From: Jo-Philipp Wich Date: Sun, 25 Sep 2011 14:14:37 +0000 Subject: [PATCH] mac80211: rework mac address generation for virtual interfaces; set locally administered bit on generated macs and change the last two bytes isntead of the first one SVN-Revision: 28298 --- package/mac80211/files/lib/wifi/mac80211.sh | 26 ++++++++++++++------- 1 file changed, 17 insertions(+), 9 deletions(-) diff --git a/package/mac80211/files/lib/wifi/mac80211.sh b/package/mac80211/files/lib/wifi/mac80211.sh index 4b254289d0..72549092bf 100644 --- a/package/mac80211/files/lib/wifi/mac80211.sh +++ b/package/mac80211/files/lib/wifi/mac80211.sh @@ -262,11 +262,27 @@ disable_mac80211() ( return 0 ) + get_freq() { local phy="$1" local chan="$2" iw "$phy" info | grep -E -m1 "(\* ${chan:-....} MHz${chan:+|\\[$chan\\]})" | grep MHz | awk '{print $2}' } + +mac80211_generate_mac() { + local off="$1" + local mac="$2" + local oIFS="$IFS"; IFS=":"; set -- $mac; IFS="$oIFS" + + local b2mask=0x00 + [ $off -gt 0 ] && b2mask=0x02 + + printf "%02x:%s:%s:%s:%02x:%02x" \ + $(( 0x$1 | $b2mask )) $2 $3 $4 \ + $(( (0x$5 + ($off / 0x100)) % 0x100 )) \ + $(( (0x$6 + $off) % 0x100 )) +} + enable_mac80211() { local device="$1" config_get channel "$device" channel @@ -353,17 +369,9 @@ enable_mac80211() { # which can either be explicitly set in the device # section, or automatically generated config_get macaddr "$device" macaddr - local mac_1="${macaddr%%:*}" - local mac_2="${macaddr#*:}" - config_get vif_mac "$vif" macaddr [ -n "$vif_mac" ] || { - if [ "$macidx" -gt 0 ]; then - offset="$(( 2 + $macidx * 4 ))" - else - offset="0" - fi - vif_mac="$( printf %02x $((0x$mac_1 + $offset)) ):$mac_2" + vif_mac="$(mac80211_generate_mac $macidx $macaddr)" macidx="$(($macidx + 1))" } [ "$mode" = "ap" ] || ifconfig "$ifname" hw ether "$vif_mac" -- 2.25.1