Cannot use "any" as interface name.

[elico]

I have tried to use "any" interface to capture traffic but it's not working.
Any way to fix this?

[jonpulsifer]

👋 hey @elico sorry for the delay. Does any mean all in your case? How did you expect this to work?

dnsmon attempts to listen to a given interface, and any is usually not an interface name. If you don't specify an interface, it attempts to listen on the first one with an assigned address, ref the snippet below:

dnsmon-go/main.go

Lines 52 to 66 in 7c417cd

	if iface == "" {
	// find network interfaces
	devices, err := pcap.FindAllDevs()
	if err != nil {
	log.Fatal(err)
	}
	// get the first device with an IP address
	for _, device := range devices {
	if len(device.Addresses) > 0 {
	iface = device.Name
	break
	}
	}
	}

[elico]

@j0npulsifer Indeed I have seen this piece of code.
I did assumed that it makes sense from an admin point of view to have a function which will open "simultaneously" all the interfaces available on the system.
I do not know how libpcap implements the "any" function which tcpdump -i any uses but, what do you thing about this idea?

[jonpulsifer]

I'll take a look at the tcpdump implementation, good idea!