)]}'
{
  "commit": "cff0ff8f582a970fa8bd688448964bef8d2b84ab",
  "tree": "be78da943008f817a8af3ba40c34f633ce855344",
  "parents": [
    "7e36a04e5b9eb206faad20f0a37fa111285ffdce"
  ],
  "author": {
    "name": "banksean",
    "email": "banksean@gmail.com",
    "time": "Wed Jun 25 16:43:47 2025 +0000"
  },
  "committer": {
    "name": "Autoformatter",
    "email": "bot@sketch.dev",
    "time": "Wed Jun 25 18:39:06 2025 +0000"
  },
  "message": "sketch: add /proc filesystem fallback for port monitoring when ss command unavailable\n\nImplements /proc/net/tcp* parsing as fallback when ss command fails to eliminate\ndependency on ss being installed in container environments.\n\nProblems Solved:\n\nss Command Dependency:\n- PortMonitor.updatePortState() relied on \u0027ss -lntu\u0027 command for port detection\n- Failed on systems where ss (iproute2 package) is not installed\n- No fallback mechanism when ss command execution failed\n- Port monitoring became non-functional in minimal container environments\n\nLimited Container Support:\n- Many minimal container images don\u0027t include ss command\n- Port monitoring silently failed without providing any functionality\n- No way to detect listening ports without external command dependencies\n\nSolution Architecture:\n\n/proc Filesystem Parsing:\n- Added getListeningPortsFromProc() method to read /proc/net/tcp* files\n- Parses /proc/net/tcp, /proc/net/tcp6, /proc/net/udp, /proc/net/udp6\n- Hex address decoding for both IPv4 and IPv6 addresses\n- Socket state filtering to identify listening sockets (state 0x0A for TCP, 0x07 for UDP)\n\nFallback Implementation:\n- updatePortState() tries ss command first, falls back to /proc on failure\n- parseAddress() handles little-endian hex encoding from /proc files\n- Generated output format matches ss command output for compatibility\n- Maintains existing parseSSPorts() functionality for ss output\n\nImplementation Details:\n\nAddress Parsing:\n- IPv4: 8-character hex string representing little-endian 32-bit address\n- IPv6: 32-character hex string with little-endian 32-bit chunks\n- Port numbers stored as big-endian hex values\n- Special address handling: 0.0.0.0 and :: converted to \u0027*\u0027\n\nSocket State Detection:\n- TCP listening sockets: state 0x0A (TCP_LISTEN)\n- UDP bound sockets: state 0x07 (TCP_CLOSE for UDP)\n- Filters out non-listening connections and states\n\nError Handling:\n- Graceful fallback when ss command fails\n- Logs debug messages for command failures\n- Continues with /proc parsing if available\n- Handles missing /proc files gracefully\n\nTesting:\n\nComprehensive Test Coverage:\n- TestParseAddress() verifies hex address decoding for IPv4/IPv6\n- TestParseProcData() validates /proc file parsing with mock data\n- TestGetListeningPortsFromProcFallback() tests complete fallback functionality\n- TestUpdatePortStateWithFallback() validates end-to-end behavior\n\nAddress Parsing Validation:\n- IPv4 localhost (0100007F:0050 -\u003e 127.0.0.1:80)\n- IPv4 wildcard (00000000:0016 -\u003e *:22)\n- IPv6 wildcard and specific addresses\n- Error handling for invalid formats and hex values\n\nFiles Modified:\n- sketch/loop/port_monitor.go: Added /proc parsing methods and fallback logic\n- sketch/loop/port_monitor_test.go: Added comprehensive tests for new functionality\n\nThe implementation ensures port monitoring works reliably in any Linux environment\nregardless of whether ss command is available, using native /proc filesystem access.\n\nCo-Authored-By: sketch \u003chello@sketch.dev\u003e\nChange-ID: s72dd58a0b3f4304bk\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "9614db20608793493cc5844da25221c73f659389",
      "old_mode": 33188,
      "old_path": "loop/port_monitor.go",
      "new_id": "105e1e76e653ce9464a732c755cd5a215085e9c1",
      "new_mode": 33188,
      "new_path": "loop/port_monitor.go"
    },
    {
      "type": "modify",
      "old_id": "a1dad57830cf48dacc3ec8f93e51f748730e7eb0",
      "old_mode": 33188,
      "old_path": "loop/port_monitor_test.go",
      "new_id": "e0f7ff1e06705406c490ac534a023ed7f73e7dd8",
      "new_mode": 33188,
      "new_path": "loop/port_monitor_test.go"
    }
  ]
}