API: pcap_next_ex did not get all the packets that met the requirements about npcap HOT 9 OPEN

npcap version:1.79
npcap-sdk version:1.13

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How many dropped packets does pcap_stats() report in ps_drop?

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Should I write fetch ps_drop in the timeout branch

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Should I write fetch ps_drop in the timeout branch

Since your capture loop seems not to ever exit, the right place to try it might be to, every N packets, for some value of N, call pcap_stats() and, if ps_drop is non-zero, print its current value as a count of dropped packets.

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Well. I tried to get ps_drop every 15678 packets, and the results seemed a little hard to understand. The code looks like this:

	srcIndex = uh->index;
	if (srcIndex % 15678 == 0)
	{
		int size;
		pcap_stat* stat = pcap_stats_ex(adhandle, &size);
		printf("drop num: %d\n", stat->ps_drop);
	}

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The results show that most of the packets are lost.

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I set the buffer size and the packet buffer timeout, and now I can fetch all the packets!
Thank you for your help, Sir.

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Another question, if I want to use Npcap to reliably transfer 1 gigabit data to another device in the LAN in the shortest possible time, is there any good advice?

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Now, I set the buffer size to 2*1024*1024*1024 (which seems to be the maximum for an int), the packet buffer timeout to 1000, and the ps_drop to end up being 0. As I scale up the number of packets to 2M, ps_drop starts to become nonzero during reads. However, the number of packets monitored by Wireshark was as expected. Am I setting my parameters wrong or missing some configuration items?

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