I wonder if there is some way to set win 7 network behavior compatible with xp.Try to solve the problem with least modification
On Wed, Mar 2, 2011 at 9:37 PM, Alberto Avanzi <[email protected]>wrote: > Hi, > > I found some time ago a problem similar to yours, that make me think that > yes, network behavior changed from > XP to Win7. > > In my case, packets emitted on a multicast socket using standard winsock2 > API AND with TTL=0 are NOT SEEN by winpcap > (that runs on the same host because of TTL=0). Changing TTL to 1 allows > winpcap to receive them on the local host or on > a remote host on the same network. > > This has changed from XP, where TTL=0 packets were seen and captured by > winpcap. > > Someone suggested that probably win7 does not inject datagrams with TLL=0 > into the network adapter, but uses a > somehow different distribution system. > > A. > > On 02/03/2011 13:46, you yuan wrote: > > Hi,Thanks for help. > According to the test, it's ok for transmitting on different computers. > I have written a simple cmd program using winpcap's api to receive packets > from the loopback adapter. It shows capture is ok. > So I think maybe something changed for xp and win7 loopback adapter system. > The winpcap's api and winsock's mechanism behave differently on xp and win > 7? > > On Wed, Mar 2, 2011 at 2:02 PM, Gianluca Varenni < > [email protected]> wrote: > >> 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: [email protected] [ >> [email protected]] On Behalf Of you yuan [ >> [email protected]] >> Sent: Sunday, February 27, 2011 3:39 AM >> To: [email protected] >> 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. >> >> _______________________________________________ >> Winpcap-users mailing list >> [email protected] >> https://www.winpcap.org/mailman/listinfo/winpcap-users >> > > > _______________________________________________ > Winpcap-users mailing > [email protected]https://www.winpcap.org/mailman/listinfo/winpcap-users > > > _______________________________________________ > Winpcap-users mailing list > [email protected] > https://www.winpcap.org/mailman/listinfo/winpcap-users > >
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