Can't receive multicast packet when promisc mode is set in IW416

[EthanHP_Tsai]

Hi, 

I am working on IW416, and found following problem.

As WIFI client,

• When promisc mode is set, can't receive any multicast packet from mlan0.
• When promisc mode is unset, it is ok to receive multicast packet from mlan0.

How can I receive multicast packets in promisc mode?

Here is some information.

insmod /lib/modules/mlan.ko
insmod /lib/modules/moal.ko cfg80211_wext=0xf fw_name=sdiouartiw416_combo_v0.bin cal_data_cfg=none

# mlanutl mlan0 version
Version string received: SDIW416---16.92.21.p11.2-MM5X16283.p2-GPL-(FP92)

Thanks,
Ethan

[Alexis_A]

Hello @EthanHP_Tsai,

Could you share the command used to enable the monitor mode?

BR,

Alexis Andalon

[EthanHP_Tsai]

Hi Alexis,

First, I use tcpdump to capture packet on mlan0, and I can't see any mDNS packet. When tcpdump start, mlan0 enter to promisc mode.

Then I try to write a simple socket program to bind udp port 5353 and 224.0.0.251, and mDNS packets are received. If I perform the command "ifconfig mlan0 promisc", can't see any mDNS packets.

I think I should be able to receive all packets when promisc mode is set.

Thanks,
Ethan

[Alexis_A · Accepted solution]

Hello @EthanHP_Tsai,

Looking internally, the FP92 doesn't support the promisc mode. 

Sorry for the inconvenience this may cause you.

BR,

Alexis Andalon

[EthanHP_Tsai]

Hi Alexis,

Thanks for your clarification.

Ethan