106 lines
4.5 KiB
Python
106 lines
4.5 KiB
Python
# engine/lib/ufw.py
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"""Apply ufw and ufw-docker rules.
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Replace existing supported marker blocks before inserting current rules.
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Docker rules go through ufw-docker; host rules through plain ufw.
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"""
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from __future__ import annotations
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import os
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import shlex
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import shutil
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APEX_START = "# START APEX.ERMNVLDMR.COM RULES"
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APEX_END = "# END APEX.ERMNVLDMR.COM RULES"
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OLD_PAIRS = [("# START ROOT.ERMNVLDMR.COM RULES", "# END ROOT.ERMNVLDMR.COM RULES")]
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def resolve_ufw_docker_bin() -> str:
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"""Find ufw-docker in PATH, /usr/local/bin, or fallback to ~/.local/bin/ufw-docker."""
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found = shutil.which("ufw-docker")
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if found:
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return found
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if os.path.isfile("/usr/local/bin/ufw-docker") and os.access("/usr/local/bin/ufw-docker", os.X_OK):
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return "/usr/local/bin/ufw-docker"
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return os.path.expanduser("~/.local/bin/ufw-docker")
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UFW_DOCKER_BIN = resolve_ufw_docker_bin()
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def clean_rules(text: str):
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"""Strip whitespace, drop blank + comment lines (matches the bash awk filter)."""
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return [s for s in (ln.strip() for ln in text.splitlines()) if s and not s.startswith("#")]
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class Ufw:
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def __init__(self, log, sys_, host):
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self.log, self.sys, self.host = log, sys_, host
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def _inject_file(self, target: str, source_file: str, dry_run: bool):
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if not os.path.isfile(source_file):
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return
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if not self.sys.ok(["sudo", "test", "-f", target]):
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self.log.error(f"Target file does not exist: {target}")
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raise SystemExit(1)
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with open(source_file, encoding="utf-8") as f:
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content = "\n".join(clean_rules(f.read()))
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self.host.inject_block(
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target,
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content,
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APEX_START,
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APEX_END,
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anchor="# End required lines",
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old_pairs=OLD_PAIRS,
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dry_run=dry_run,
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sudo=True,
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)
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def apply(self, rules_dir: str | None = None, config_dir: str | None = None, dry_run: bool = False) -> None:
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if rules_dir and not os.path.isdir(rules_dir):
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self.log.error(f"Rules directory does not exist: {rules_dir}")
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raise SystemExit(66)
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if config_dir and not os.path.isdir(config_dir):
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self.log.error(f"Config directory does not exist: {config_dir}")
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raise SystemExit(66)
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if not rules_dir and not config_dir:
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self.log.warn("Neither docker nor host ufw rules directory found; nothing to apply.")
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return
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if not self.sys.ok(["sudo", "ufw", "--version"]):
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self.log.error("ufw not installed/working via sudo. Run config/packages first.")
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raise SystemExit(1)
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if not (os.path.isfile(UFW_DOCKER_BIN) and os.access(UFW_DOCKER_BIN, os.X_OK)):
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self.log.error(f"ufw-docker not found at {UFW_DOCKER_BIN}. Run config/ufw-docker first.")
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raise SystemExit(1)
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if config_dir:
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host_rules = os.path.join(config_dir, "host.rules")
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if os.path.isfile(host_rules):
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with open(host_rules, encoding="utf-8") as f:
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rules = clean_rules(f.read())
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for rule in rules:
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self.log.info(f"Applying host ufw rule: {rule}")
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if dry_run:
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self.log.info(f"[DRY-RUN] sudo ufw {rule}")
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else:
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self.sys.sudo(["ufw", *shlex.split(rule)], check=True)
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self._inject_file("/etc/ufw/before.rules", os.path.join(config_dir, "before.rules"), dry_run)
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self._inject_file("/etc/ufw/after.rules", os.path.join(config_dir, "after.rules"), dry_run)
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if rules_dir:
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rule_files = [fn for fn in sorted(os.listdir(rules_dir)) if fn.endswith(".rules") and not fn.startswith(".")]
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if not rule_files:
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self.log.warn(f"No .rules files found in {rules_dir}, nothing to apply.")
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for fn in rule_files:
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with open(os.path.join(rules_dir, fn), encoding="utf-8") as f:
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rules = clean_rules(f.read())
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for rule in rules:
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self.log.info(f"Applying ufw-docker rule ({fn}): {rule}")
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if dry_run:
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self.log.info(f"[DRY-RUN] sudo {UFW_DOCKER_BIN} {rule}")
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else:
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self.sys.sudo([UFW_DOCKER_BIN, *shlex.split(rule)], check=True)
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self.log.success("All ufw rules applied.")
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self.log.warn("Run `sudo systemctl restart ufw` to apply. Ensure ssh is allowed via plain ufw!")
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