Reads bytes from a network interface card (NIC).
nic <iface> [-s|--snaplen <count>] [-e|--emit-file-headers]
nic loader uses libpcap to acquire packets from a network interface and
packs them into blocks of bytes that represent PCAP packet records.
The received first packet triggers also emission of PCAP file header such that downstream operators can treat the packet stream as valid PCAP capture file.
The default parser for the
nic loader is
Sets the snapshot length of the captured packets.
This value is an upper bound on the packet size. Packets larger than this size
get truncated to
Creates PCAP file headers for every flushed batch.
nic connector emits chunk of bytes that represent a stream of packets.
--emit-file-headers every chunk gets its own PCAP file header, as
opposed to just the very first. This yields a continuous stream of concatenated
pcap parser can handle such concatenated traces, and
optionally re-emit thes file headers as separate events.
Read PCAP packets from
from nic eth0
Perform the equivalent of
tcpdump -i en0 -w trace.pcap:
load nic en0 | save file trace.pcap