[RPi] ConnMan resource socket leak (1024 FD crash) when using kernel-space WireGuard (wg0)

#!/bin/sh
# chmod +x /storage/.config/scripts/connman-leak-test.sh
# /storage/.config/scripts/connman-leak-test.sh

OUTDIR=/storage/.cache/connman-diagnostics-$(date +%Y%m%dT%H%M%S)
mkdir -p "$OUTDIR"
PASTE_LOG="$OUTDIR/connman-leak-test.txt"

trap 'echo -e "\n[$(date +%H:%M:%S)] Execution interrupted by user! Jumping to final metrics collection..."; break' INT

echo "=== CONNMAN DIAGNOSTICS (PASSIVE MONITOR) ===" > "$PASTE_LOG"
echo "OS: $(cat /etc/os-release | grep PRETTY_NAME | cut -d'"' -f2)" >> "$PASTE_LOG"
echo "Kernel: $(uname -r)" >> "$PASTE_LOG"
if [ -f /proc/device-tree/model ]; then
  echo "Hardware Model: $(cat /proc/device-tree/model)" >> "$PASTE_LOG"
fi
echo "----------------------------------------" >> "$PASTE_LOG"

pid=$(pidof connmand)
echo "Connmand PID: $pid" >> "$PASTE_LOG"

echo "[$(date +%H:%M:%S)] Toggling Kodi component debug logging ON..."
kodi-send --action="SetLogLevel(2)" >/dev/null 2>&1 || true

echo "[$(date +%H:%M:%S)] Collecting FIRST snapshot (T=0)..."
echo "=== SNAPSHOT 1: START ===" >> "$PASTE_LOG"
echo "Timestamp: $(date)" >> "$PASTE_LOG"
if [ -n "$pid" ]; then
  echo "FD count: $(ls -l /proc/$pid/fd 2>/dev/null | wc -l)" >> "$PASTE_LOG"
  echo "Active FD targets (Top 20):" >> "$PASTE_LOG"
  (for f in /proc/$pid/fd/*; do readlink -f "$f" 2>/dev/null || readlink "$f" 2>/dev/null; done ) | sort | uniq -c | sort -nr | head -n 20 >> "$PASTE_LOG" 2>&1 || true
fi
echo "----------------------------------------" >> "$PASTE_LOG"

echo "[$(date +%H:%M:%S)] Sleeping for 30 minutes to let the leak accumulate..."
echo "Press Ctrl+C at any time to skip the wait and generate the log immediately."

for i in $(seq 1 1800); do
  sleep 1
done

trap - INT

echo "[$(date +%H:%M:%S)] Collecting SECOND snapshot (T=+30 min)..."
echo -e "\n=== SNAPSHOT 2: AFTER 30 MIN ===" >> "$PASTE_LOG"
echo "Timestamp: $(date)" >> "$PASTE_LOG"
if [ -n "$pid" ]; then
  echo "FD count: $(ls -l /proc/$pid/fd 2>/dev/null | wc -l)" >> "$PASTE_LOG"
  echo "Active FD targets (Top 20):" >> "$PASTE_LOG"
  (for f in /proc/$pid/fd/*; do readlink -f "$f" 2>/dev/null || readlink "$f" 2>/dev/null; done ) | sort | uniq -c | sort -nr | head -n 20 >> "$PASTE_LOG" 2>&1 || true
  
  if [ -r /proc/net/netlink ]; then
    echo -e "\n=== /proc/net/netlink ===" >> "$PASTE_LOG"
    cat /proc/net/netlink >> "$PASTE_LOG"
  fi
fi

echo -e "\n=== RECENT KODI LOG ENTRIES FOR ADDON ===" >> "$PASTE_LOG"
if [ -f /storage/.kodi/temp/kodi.log ]; then
  grep -Ei "connman|wireguard" /storage/.kodi/temp/kodi.log | tail -n 150 >> "$PASTE_LOG" 2>&1 || true
fi

echo -e "\n=== RECENT SYSTEM JOURNAL LOGS FOR CONNMAN ===" >> "$PASTE_LOG"
journalctl -u connman.service -n 150 --no-pager >> "$PASTE_LOG" 2>&1 || true

echo "[$(date +%H:%M:%S)] Toggling Kodi component debug logging OFF..."
kodi-send --action="SetLogLevel(0)" >/dev/null 2>&1 || true

echo "----------------------------------------"
echo "Uploading results..."

PASTE_URL=""
if command -v paste >/dev/null 2>&1; then
  PASTE_URL=$(paste "$PASTE_LOG" 2>/dev/null)
fi

if [ -z "$PASTE_URL" ]; then
  echo "Deploying curl fallback to ix.io..."
  PASTE_URL=$(curl -s -F "f:1=@$PASTE_LOG" ix.io)
fi

if [ -n "$PASTE_URL" ]; then
  echo "----------------------------------------"
  echo "Your diagnostic paste link is:"
  echo "$PASTE_URL"
  echo "----------------------------------------"
else
  echo "Upload failed. Log preserved locally at: $PASTE_LOG"
fi