pcapopenlive
pcap_open_live is a function from the libpcap library that opens a live capture on a specified network device. It initializes a capture session and returns a handle (of type pcap_t) that is used by subsequent capture operations such as pcap_loop, pcap_dispatch, or pcap_next_ex. The function is available on platforms that support libpcap, including Unix-like systems and Windows (via WinPcap or Npcap).
The function takes five arguments: device is the name of the network interface to capture from; snaplen
Usage considerations include that the returned handle must be closed with pcap_close when the capture is finished.
See also: other libpcap functions for offline captures and filter management, such as pcap_open_offline, pcap_open_dead, pcap_loop,