[Winpcap-users] win 7 loopback adapter with winpacp pcap_sendpacket sending multicast packets

[Gianluca Varenni]

Do the same packets get send on a standard non-loopback adapter (i.e. transmitter and receiver on different computers)?

Have a nice day
GV

________________________________________
From: winpcap-users-bounces at winpcap.org [winpcap-users-bounces at winpcap.org] On Behalf Of you yuan [yuanprivacy at gmail.com]
Sent: Sunday, February 27, 2011 3:39 AM
To: winpcap-users at winpcap.org
Subject: [Winpcap-users] win 7 loopback adapter with winpacp pcap_sendpacket    sending multicast packets

HI,everyone
  Recently I have come across a problem concerning winpcap sending  multicast packets on windows 7 loopback adapter.
  Here have an application with two componets.One componet is a
simulator using winpcap to send and receive multicast packets on
windows networks adapters with fixed ip(i.e,192.10.x.x). Another is a net module using winsock's setsockopt,ioctlsocket, recvfrom etc
functions to receive multicast packets sent by the first componet.
  My problem is when I use windows 7 loopback adapter with fixed ip,the first compent can send packet out(see it from the wireshark), But the net module component can't receive any packets. However, the same application really works on windows XP.
  I rarely know anything winpcap packet sending mechanisms with
windows loopback adapter.I don't know how to fix the problem under windows 7.
  I have searched many times but gain nothing.Does anyone have the similar problem or know something  or some keywords about this, please help. Thanks in advance.