netsniff: Allow filter input pcap file to output pcap
It might be useful to filter out interesting traffic
from input pcap to output pcap file which will contain only
filtered packets:
$ netsniff-ng -i input.pcap -o output.pcap ip src 192.168.1.198
Now it is possible by specifying output pcap file with ".pcap"
extension, otherwise the trafgen file will be generated as by default.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
[tklauser: small wording and whitespace adjustment]
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>