I can't find the device name for pcap.Openlive

php editor Baicao received a question from a reader: "I can't find the device name of pcap.Openlive." When capturing network packets, pcap.Openlive is a commonly used Function, used to open the network device for real-time packet capture. However, sometimes we may encounter the problem of not being able to find the device name, resulting in the inability to capture packets. In this case, there are several possible causes that need to be checked and resolved. Next, we will detail these reasons and provide corresponding solutions.

Question content

I'm trying to capture packets using gopackets and pcap but I can't find the function pcap.OpenLive device name.

I tried wlan0 as the device name but I got an error

Error opening adapter: The filename, directory name, or volume label syntax is incorrect. (123)

Workaround

This is the Linux-style device name. Other operating systems have different naming conventions.

Naming conventions (WinPcap or Npcap) on Windows...are difficult. These names include the hexadecimal representation of the 128-bit GUID.

You should try using FindAllDevs to get a list of devices and display the device with its name and description, although the description may not be that useful.

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