On Fri, 21 Apr 2006 22:29:29 +0200, Johannes Berg wrote: > On Fri, 2006-04-21 at 22:11 +0200, Jiri Benc wrote: > > > Also, "soft" and "hard" monitor modes are introduced. > > What's the distinction? The code might want some comments about what > that > > > + /* Device is capable of performing full monitor mode even during > > + * normal operation. */ > > actually means. I suppose it means that the device will receive control > frames too, but I don't know if that's right.
Some devices need to be switched to completely different mode to be able to receive all frames (including control ones) or even load another firmware. Such devices are not capable to transmit anything while in monitor mode and their drivers won't set monitor_during_oper. Another devices are capable to receive all frames while continuing their normal operation. Driver will probably set monitor_during_oper in that case. "Hard" monitor mode means the card is operating in a true rfmon mode - i.e. you get everything on the given channel. "Soft" monitor mode means that you will get only frames the device is willing to give you at the time - this probably means only frames belonging to your BSS in case of fullmac cards. So, you can always do echo -n sta0 > /sys/class/ieee80211/wiphy0/add_iface echo -n mon0 > /sys/class/ieee80211/wiphy0/add_iface iwconfig sta0 mode managed iwconfig mon0 mode monitor ifconfig sta0 up ifconfig mon0 up and this will work - independently of the value of monitor_during_oper. The difference is that in case of monitor_during_oper == 0, you won't probably receive much more frames from mon0 than from sta0. But - you will most likely receive beacons on mon0 and also monitoring headers (prism2 headers presently). When monitor_during_oper == 1, you are able to watch all traffic on the current channel on mon0 without interrupting normal functionality. -- Jiri Benc SUSE Labs - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
