[WinPcap-users] Problem to list packet with pcap_next_ex

Julien Seignalet Mon, 19 Apr 2004 00:50:56 -0700

Hello all,

First time I used this mailing list so hello all :)

I program a c++ software to capture network traffic and analyze it so Winpcap is very useful :)

But i got an issue with the pcap_next_ex function. I explain:

In my code i analyze the paket as soon as they arrived and it works fine. (i analyze pkt_data and prints the packet).

After that, i need to "construct" a Paquet Class with its packet_data and the number of the packet.

After having my packet, i add it into a list of packet and here is the issue. When i print my list after for example, 5 packets received, my list seems bugged, as if pkt_data was not correct.

Here is the code in C++:

//Code located into a thread to sniff while executing other commands in the main program

while((res = pcap_next_ex( adhandle, &header, &pkt_data)) >= 0){

        if(res == 0)
          { /* Timeout elapsed */
          //continue;
         }
          else
          {
          if (res == -1)
                {
                }
                else
                {
               paquet = pkt_data;
               Paquet_courant = new C_Paquet (paquet, cpto);

cpto ++;

Liste_Paque->Add((void*)Paquet_courant);

Synchronize (AfficherListe);

}

type of Liste_Paque is: TList *Liste_Paque;

AfficherListe is a function to print list of packets.

When i print mypackets, it works fine for generally 3 or 4 packets and after, it prints unattended data....

So can u explain me how to store each packet into a list ?

I need this storage list because i use it in other capabilities of my program.

Any help will be appreciated.

Thanks a lot.

[WinPcap-users] Problem to list packet with pcap_next_ex

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