[Winpcap-users] Ping works only when ethereal is ON

[Gianluca Varenni]

My bet is that your miniport is not managing OID_GEN_CURRENT_PACKET_FILTER 
correctly. When you start ethereal or any other winpcap based application 
and you use it in promiscuous mode, the WinPcap protocol driver sets the 
PACKET_FILTER to NDIS_PACKET_TYPE_PROMISCUOUS. Otherwise it uses 
NDIS_PACKET_TYPE_ALL_LOCAL.

Do all the ICMP echo requests get "discarded" by the TCP/IP stack when 
ethereal is off, or just some of them?

Have a nice day
GV

----- Original Message ----- 
From: "Sunil Dutt" <sunil.d at redpinesignals.com>
To: <winpcap-users at winpcap.org>
Sent: Wednesday, July 02, 2008 6:11 AM
Subject: [Winpcap-users] Ping works only when ethereal is ON


> Hi,
>  We are working on  USB based WinXP network WLAN station driver.
> We are facing an issue with the ICMP(the association to the AP is done).
> We do a ping request to the AP and also get the reply from the AP.We also 
> indicate the received reply to the TCP/IP stack but the successive pings 
> do not take place.
> The same happens when the ethereal(packet sniffer ) is on.
> When we close the sniffer the successive pings do not happen.
> We could not find any relation between indication of the received packet 
> to the TCP/IP stack and the ethereal.
> The firewall in the case of WINDOWS is TURNED OFF.
> Can anyone comment on this.
>
> Thanks in Advance
> sunil
>
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