dropspy is a (POC-quality) reworking of the C-language
dropwatch tool in Go, with some extra features.
This is currently potato code and I make no promises that it works at all.
git clone https://github.com/superfly/dropspy.git cd dropspy go install ./cmd/dropspy
./dropspy: Report packet drops from Linux kernel DM_MON. ./dropspy [flags] [pcap filter] ie: ./dropspy -hex -iface lo udp port 53 -count uint maximum drops to record -hex print hex dumps of matching packets -hw record hardware drops (default true) -iface value show only drops on this interface (may be repeated) -isym value include drops from syms matching regexp (may be repeated) -maxlen uint maximum packet length for drops -minlen uint minimum packet length for drops -sw record software drops (default true) -timeout string duration to capture for (300ms, 2h15m, &c) -xsym value exclude drops from syms matching regexp (may be repeated)