48 lines
1.6 KiB
Python
48 lines
1.6 KiB
Python
import os
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from pathlib import Path
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from decnet.services.base import BaseService
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TEMPLATES_DIR = Path(__file__).parent.parent / "templates" / "smtp"
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ARTIFACTS_ROOT = os.environ.get("DECNET_ARTIFACTS_ROOT", "/var/lib/decnet/artifacts")
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# In-container path for full-message capture. /var/spool/mqueue is where
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# sendmail historically parks unsent messages, so `ls` / `mount` inside the
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# container looks benign to an attacker poking around.
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_IN_CONTAINER_QUARANTINE = "/var/spool/mqueue"
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class SMTPService(BaseService):
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name = "smtp"
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ports = [25, 587]
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default_image = "build"
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def compose_fragment(
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self,
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decky_name: str,
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log_target: str | None = None,
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service_cfg: dict | None = None,
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) -> dict:
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cfg = service_cfg or {}
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quarantine_host = f"{ARTIFACTS_ROOT}/{decky_name}/smtp"
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fragment: dict = {
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"build": {"context": str(TEMPLATES_DIR)},
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"container_name": f"{decky_name}-smtp",
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"restart": "unless-stopped",
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"cap_add": ["NET_BIND_SERVICE"],
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"environment": {
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"NODE_NAME": decky_name,
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"SMTP_QUARANTINE_DIR": _IN_CONTAINER_QUARANTINE,
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},
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"volumes": [f"{quarantine_host}:{_IN_CONTAINER_QUARANTINE}:rw"],
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}
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if log_target:
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fragment["environment"]["LOG_TARGET"] = log_target
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if "banner" in cfg:
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fragment["environment"]["SMTP_BANNER"] = cfg["banner"]
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if "mta" in cfg:
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fragment["environment"]["SMTP_MTA"] = cfg["mta"]
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return fragment
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def dockerfile_context(self) -> Path:
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return TEMPLATES_DIR
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