snapshot of https://github.com/jitsi/jitsi-videobridge.git @ fcbf741c646bc237d2ed85a1e86910532532b831 (2026-09-15)

resources/link-conditioner.sh

@@ -0,0 +1,51 @@
+#!/bin/sh
+
+PLR=${PLR:-'0.1'}
+DELAY=${DELAY:-100}
+BW=${BW:-'1Mbit/s'}
+PORT=${PORT:-10000}
+EGRESS_PIPE=1
+INGRESS_PIPE=2
+
+condition_egress() {
+  # Create an anchor and reload pf conf.
+  (cat /etc/pf.conf && echo "dummynet-anchor \"jitsi-videobridge\"" && echo "anchor \"jitsi-videobridge\"") | sudo pfctl -f -
+
+  # Pipe all UDP traffic from port PORT through the EGRESS_PIPE.
+  echo "dummynet out quick proto udp from any port $PORT to any pipe $EGRESS_PIPE" | sudo pfctl -a jitsi-videobridge -f -
+
+  # Configure the egress pipe.
+  sudo dnctl pipe $EGRESS_PIPE config bw $BW plr $PLR delay $DELAY
+}
+
+condition_ingress() {
+  # Create an anchor and reload pf conf.
+  (cat /etc/pf.conf && echo "dummynet-anchor \"jitsi-videobridge\"" && echo "anchor \"jitsi-videobridge\"") | sudo pfctl -f -
+
+  # Pipe all UDP traffic to port PORT through the INGRESS_PIPE.
+  echo "dummynet out quick proto udp from any to any port $PORT pipe $INGRESS_PIPE" | sudo pfctl -a jitsi-videobridge -f -
+
+  # Configure the ingress pipe.
+  sudo dnctl pipe $INGRESS_PIPE config bw $BW plr $PLR delay $DELAY
+}
+
+condition_flush() {
+  sudo dnctl -f flush
+  sudo pfctl -f /etc/pf.conf
+}
+
+main() {
+   case "$1" in
+      ingress)
+         condition_ingress
+         ;;
+      egress)
+         condition_egress
+         ;;
+      flush)
+         condition_flush
+         ;;
+   esac
+}
+
+main "$@"