[Winpcap-users] Problems with pcap_sendpacket() function

Leonardo Barata w32.chess at gmail.com
Thu Mar 27 20:08:03 GMT 2008

On Thu, Mar 27, 2008 at 5:17 PM, Gianluca Varenni <
gianluca.varenni at cacetech.com> wrote:

>  - Which kind of device are you using with pcap_send()?
> - You are talking about a modem. Are you trying to inject packets over a
> modem connection?
> - Which kind of packets are you trying to inject?
> - When "the internet stops working" what happens exactly on the network?
> Have you tried sniffing the network and see if your machine still sends
> packets?
> Have a nice day
> GV
> ----- Original Message -----
> *From:* Leonardo Barata <w32.chess at gmail.com>
> *To:* winpcap-users at winpcap.org
> *Sent:* Thursday, March 27, 2008 9:22 AM
> *Subject:* [Winpcap-users] Problems with pcap_sendpacket() function
> Hi,
> I'm having problems with pcap_sendpacket() function. When I repeatedly
> send packets with it, my internet stops working (It stops being able to send
> packets). I then have to restart my computer so my internet works again
> (sometimes I even have to reset my modem).
> I'm using NVIDIA nForce device to send the packets and my WinPcap version
> is 4.0.2 . My OS is Windows XP SP2.
> ------------------------------
> _______________________________________________
> Winpcap-users mailing list
> Winpcap-users at winpcap.org
> https://www.winpcap.org/mailman/listinfo/winpcap-users
> _______________________________________________
> Winpcap-users mailing list
> Winpcap-users at winpcap.org
> https://www.winpcap.org/mailman/listinfo/winpcap-users

- I'm using pcap_sendpacket with NVIDIA nForce Networking Controller(onboard
device), but I've also used it with SMZ EZ card 10/100/1000 (which connects
my other pc to this one with a crossover cable). It always happens the same
thing with any device I use.

- I don't know very well what you mean with "inject packets over a modem
connection", but what I'm doing is simply using pcap_sendpacket to send a
packet I made(with ethernet, IP and tcp headers) to a remote IP address.

- I'm just "injecting" a simple TCP packet with SYN flag. I think the packet
is not the problem, because when I send it to any server I can see the
SYN/ACK response.

-  Yes, I've already try to sniff when it happens. I receive packets from
remote addresses(TCP AND UDP protocols mostly), but I can't send any
packet(and it doesn't sniff any packets going out), not even to my other

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.winpcap.org/pipermail/winpcap-users/attachments/20080327/475bff0e/attachment-0001.htm

More information about the Winpcap-users mailing list