v0.4.5

[0.4.5] - 2026-06-23

Added

• Zero-Leak Shutdown (Graceful Teardown with Active Socket Slaughter): Implemented a multi-stage active socket termination and lockdown sequence during ttp stop to eliminate in-flight cleartext traffic leaks. Before final firewall ruleset removal, a temporary lockdown drop rule is applied (exempting the Tor daemon), followed by an Active Socket Slaughter phase injecting TCP Reset (meta l4proto tcp counter reject with tcp reset) and standard reject rules with a 1.5-second micro-delay. This actively terminates pending local connections before lowering the firewall.
• Connection Tracking Flush: Added automatic Netfilter connection tracking state invalidation via conntrack -F (when the conntrack utility is available) to terminate active TCP/UDP streams before final firewall ruleset removal.
• IPv6 Force Disable Flag: Added --no-ipv6 CLI option to start and restart commands, allowing users to force drop all outbound IPv6 traffic via nftables rules (meta nfproto ipv6 drop) to prevent leaks even if the host machine supports IPv6.
• System Integrity Watchdog Auto-Healing for IPv6: Integrated --no-ipv6 state checking into the session watchdog. During auto-healing operations, the watchdog reads the state lock and correctly re-applies firewall, DNS, and Tor configurations with IPv6 disabled if configured.
• CLI Reports for IPv6 Status: Updated status and check commands to explicitly show the status of IPv6 traffic routing: Enabled (Redirected), Disabled (Force Dropped), or Disabled (Not supported by host).
• Bring Your Own Daemon (BYOD) Mode: Added --external-daemon and --tor-uid CLI options to both start and restart commands, allowing TTP to run on systemd-less environments (such as Alpine Linux or Void Linux) and inside lightweight Docker containers.
• Passive Health Check & UID Parser: Implemented socket owner auto-detection reading /proc/net/tcp and /proc/net/tcp6 to find Tor's numeric UID (resolving firewall loops), alongside passive TCP/UDP port checks on the target ports when using --external-daemon.
• Network Sandbox Engine (NSE) Integration: Fully integrated the PyPI package network-sandbox-engine and pyroute2 for automated ruleset tests.
• Zero-Leak PCAP Ruleset Test: Added tests/test_nse_rules.py to validate nftables schemas in isolated namespaces, using an asynchronous Scapy sniffer to assert zero cleartext packets escaping to the WAN.
• Chaos Monkey Stress Test: Introduced tests/chaos_monkey.py to verify watchdog/killswitch auto-healing resilience under injected failures.
• Architectural Decision Records (ADRs): Created a dedicated docs/decisions/ directory containing records for all major architectural decisions (0001 through 0008) made since project inception.
• Split Tunneling by UID/GID: Added --bypass-user and --bypass-group options to the start and restart CLI commands. These options accept usernames or groupnames (supporting individual values, comma-separated lists, or multiple flags), resolve them dynamically to numeric UIDs/GIDs via standard Python pwd/grp libraries, and store them in the session lock file ttp.lock.
• Bypass Firewall Exceptions: Generates meta skuid <uid> accept and meta skgid <gid> accept nftables rules placed at the top of the output, prerouting, and filter_out chains. This allows bypassed users and groups to access the cleartext internet directly, bypassing both Tor NAT redirection and the emergency killswitch.
• Watchdog Bypass Auto-Healing: Updated the background watchdog daemon to read the bypassed users/groups from the session lock file, dynamically verify that their firewall bypass rules are active in the running nftables ruleset, and trigger auto-healing to restore them if missing or modified.
• Strict Lock Permissions: The volatile lock file /run/ttp/ttp.lock is now created/updated with strict 0o644 permissions to protect active session state from unauthorized write access.
• docs/interfaces.md (OSPS-SA-02.01): New authoritative reference for all external interfaces — full CLI command table with options, exit codes and root-privilege requirements; Tor integration (managed ports, control protocol, torrc directives, pluggable transports); system integration (nftables table/chain/rule-order, DNS bind-mount overlay, volatile systemd units, filesystem path inventory); and external network endpoints used for verification.
• docs/bridges.md: New user guide for obtaining, configuring, and verifying Tor Bridges and Pluggable Transports (obfs4, snowflake) in TTP.
• docs/documentation-policy.md: New repository policy specifying required tests, changelog, and component documentation updates for each type of repository modification.
• docs/security-assessment.md (OSPS-SA-03.01): New STRIDE threat model and risk assessment covering all TTP components (firewall.py, dns.py, tor_install.py/tor_control.py, state.py, watchdog.py, cli.py), trust boundary diagram, known limitations table with severity ratings, supply chain security controls, and a 16-item security controls summary matrix.
• MAINTAINERS.md: New governance document listing Project Lead, a ## Project Roles table mapping each operational role (Code Reviewer, Release Manager, Security Officer, CI/CD Maintainer) to its current holder, access to sensitive resources, merge policy, and maintainer onboarding/offboarding process.
• DEPENDENCIES.md: New dependency policy document covering runtime and dev/build Python dependencies with version constraints and licenses, system-level dependencies, optional dynamic dependencies (SELinux tools, pluggable transports), and policies for vetting, version pinning, vulnerability monitoring (pip-audit --path .), and upgrading.

Changed

• README.md Optimization: Replaced the redundant and detailed How It Works section with a high-level summary and direct link to the authoritative docs/architecture.md documentation.
• RPM Packaging Builder: Added --nodeps to rpmbuild in packaging/build_rpm.sh to prevent build-time dependency checking failures in Debian/Ubuntu-based CI environments (e.g. GitHub Actions runners) that lack a populated RPM database.

Fixed

• Garbage Collection Namespace Bug: Fixed premature namespace teardown in integration tests by maintaining a reference to the ns_sandbox generator fixture context.
• Multicast Filtering in Leak sniffer: Added IGMP/multicast/NDP packet exclusions to prevent false-positive leak assertions in ruleset tests.