[Winpcap-users] About pcap_sendqueue

[Gianluca Varenni]

  ----- Original Message ----- 
  From: Emma Jin 
  To: winpcap-users at winpcap.org 
  Sent: Wednesday, March 04, 2009 1:41 PM
  Subject: [Winpcap-users] About pcap_sendqueue


          Hello,

          I am new to pcap. I am trying to use pcap to implement a switch. I have a few questions about the pcap_sendqueue. 

          Can I create a queue and reuse it again and again? I mean, I want to create a queue, capture packets and put them into the queue until it is full. Then I will send the packets out using pcap_sendqueue_transmit and continue the same process.

        Yes, you can.

          Does the queue have to be full before pcap_sendqueue_transmit is called?

        No. The library will transmit whatever you have put in the queue.

          One more question about device handle. If I open a device and obtain a device handle, do I need to close the handle somehow? If so, how to close it? If I open the same device twice, what is going to happen?

        You need to close it with pcap_close().
        And you can definitely open the same device more than once. Evey device handle will work as a separate capture instance, e.g. you can use different filters on each handle.

        GV


          Thank you very much.

          Emma 




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