feat: testing scripts used

Author: Jadon-Chan

.gitignore

@@ -1,6 +1,5 @@
 /target
 Cargo.lock
 *.pcap
-/scripts
 /*.md
 *.log

scripts/cleanup.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/bash
+
+sudo ip link delete dev tap0
+sudo ip link delete dev tap1
+sudo ip link delete dev br0

scripts/emulate_setup.sh

@@ -0,0 +1,61 @@
+#!/usr/bin/bash
+
+# Set up tap0
+sudo ip tuntap add name tap0 mode tap user $USER 
+sudo ip link set tap0 up
+sudo ip addr add 192.168.69.1/24 dev tap0
+
+# Set up tap1
+sudo ip tuntap add name tap1 mode tap user $USER 
+sudo ip link set tap1 up
+sudo ip addr add 192.168.69.2/24 dev tap1
+
+# Create a bridge
+sudo ip link add name br0 type bridge
+
+# Add both TAP interfaces to the bridge
+sudo ip link set tap0 master br0
+sudo ip link set tap1 master br0
+
+# Bring up the bridge
+sudo ip link set br0 up
+
+# Network emulation parameters (customize these!)
+DELAY="10ms"           # One-way delay (RTT will be 2x this)
+BANDWIDTH="400mbit"     # Bandwidth limit
+BUFFER_PACKETS="4000"   # Buffer size in packets (router queue)
+MTU=1500              # Maximum transmission unit
+NETEM_LIMIT="4000"   # Netem queue limit in packets (must be large for high BDP!)
+
+# Calculate buffer size in bytes
+BUFFER_BYTES=$((BUFFER_PACKETS * MTU))
+
+# Calculate burst size (should be at least rate/HZ, typically rate/10 for smoother shaping)
+# For 10mbit: 10000000/8/10 = 125000 bytes
+BURST=$((10 * MTU))
+
+# Apply traffic control on tap0 (server side)
+# netem for delay with large buffer to handle BDP
+sudo tc qdisc add dev tap0 root handle 1: netem delay $DELAY limit $NETEM_LIMIT
+# tbf for bandwidth limiting with tail-drop
+sudo tc qdisc add dev tap0 parent 1:1 handle 10: tbf rate $BANDWIDTH burst $BURST limit $BUFFER_BYTES
+
+# Apply traffic control on tap1 (client side)
+sudo tc qdisc add dev tap1 root handle 1: netem delay $DELAY limit $NETEM_LIMIT
+sudo tc qdisc add dev tap1 parent 1:1 handle 10: tbf rate $BANDWIDTH burst $BURST limit $BUFFER_BYTES
+
+echo "Network emulation setup complete:"
+echo "  - Delay: $DELAY per direction (RTT: ~$((2 * ${DELAY%ms}))ms)"
+echo "  - Bandwidth: $BANDWIDTH"
+echo "  - Buffer: $BUFFER_PACKETS packets ($BUFFER_BYTES bytes)"
+echo "  - Loss: Only on buffer overflow (tail-drop)"
+echo ""
+echo "BDP calculation for reference:"
+BDP_BYTES=$((${BANDWIDTH%mbit} * 1000000 / 8 * ${DELAY%ms} / 1000))
+BDP_PACKETS=$((BDP_BYTES / MTU))
+echo "  - Bandwidth-Delay Product: ~$BDP_PACKETS packets ($BDP_BYTES bytes)"
+if [ $BUFFER_PACKETS -lt $BDP_PACKETS ]; then
+    echo "  ⚠ Warning: Buffer < BDP, expect losses even at full link utilization"
+else
+    echo "  ✓ Buffer >= BDP, good for testing"
+fi

scripts/perf_client_run.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/bash
+
+# Usage: ./scripts/perf_client_run.sh [bbr|cubic|reno|none]
+# Default is bbr
+
+ALGO=${1:-bbr}
+
+SMOLTCP_IFACE_MAX_ADDR_COUNT=3 ./target/release/examples/perf_client --tap tap1 -c $ALGO -s 192.168.69.1 -p 8000

scripts/perf_server_run.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/bash
+
+# Usage: ./scripts/perf_server_run.sh [bbr|cubic|reno|none]
+# Default is bbr
+
+ALGO=${1:-bbr}
+
+SMOLTCP_IFACE_MAX_ADDR_COUNT=3 ./target/release/examples/perf_server --tap tap0 -c $ALGO