Do you use the Packet.dll or the Winpcap? A thing to remember is that WinPcap library function pcap_next(), returns a pointer to the packet in its own buffer, so if you hang on to the packet to long you may risk it being overwritten. In bursts maybe this could cause the error, but the depends on your code. Can't see how using a greater buffer would enhance this error, so maybe i'm of track. Just a thought...
- Jesper -----Original Message----- From: David Rodriguez [mailto:[EMAIL PROTECTED]] Sent: 8. august 2002 15:06 To: [EMAIL PROTECTED] Subject: Re: [WinPcap-users] Loosing Packets or truncated packets I dont use any filter I use the following: NdisSetPacketFlags(pPacket, NDIS_FLAGS_SKIP_LOOPBACK); // for avoid reading packets writing in one interface were read it again. I use also win 2000 David ----- Original Message ----- From: "Loris Degioanni" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, July 30, 2002 3:53 AM Subject: Re: [WinPcap-users] Loosing Packets or truncated packets > Do you set a filter? If yes, what is its snaplen? > > Loris > > > Hello > > > > I am doing an application using 2 nic cards, I read information from one > interface > > > > and then send for the other interface. > > > > The problem is when I do ping from a router (the router send the ping > > > > every 1 ms ) the packet is truncated to 64 bytes. The size of the ping > > > > is 74 bytes. > > > > The strange thing is tha if I use 256K of buffer for 2 interfaces I rarely > get the > > > > error. But when I increase the buffer to 2M I get a lot of error specially > when the > > > > traffic is burstly. > > > > What the increase of the buffer produce this error, does the driver copy > all > > > > the content of the kernel memory to the user memory even the memory has > > > > little information ? > > > > Note: My timeout in PacketSetReadTimeout is Zero > > > > > > > > Thaks in advanced > > > > > > > > David > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > David Rodriguez > > davidgrs > > > > > > -------------------------------------------------------------------------- > ------ > > Join the world's largest e-mail service with MSN Hotmail. Click Here > > > > >
