napalm_device_types/__init__.py

@@ -90,6 +90,7 @@ from napalm_device_types.fixes import (
     run_fix_steps,
 )
 from napalm_device_types.health_metrics import HealthMetricsMixin
+from napalm_device_types.firmware import FirmwareOfferMixin
 from napalm_device_types.licenses import LicenseMixin
 from napalm_device_types.host_reboot import HostRebootMixin
 from napalm_device_types.interface_filter import InterfaceFilterMixin
@@ -116,6 +117,7 @@ from napalm_device_types.models import (
     PowerAction,
     PowerStateDict,
     HypervisorHostDict,
+    FirmwareOfferDict,
     LicenseDict,
     FixResultDict,
     FixStepDict,
@@ -171,6 +173,8 @@ from napalm_device_types.switch import SwitchDriver
 
 __all__ = [
     "HypervisorHostDict",
+    "FirmwareOfferDict",
+    "FirmwareOfferMixin",
     "LicenseDict",
     "LicenseMixin",
     "EnsurePackageMixin",

napalm_device_types/firmware.py

@@ -0,0 +1,32 @@
+# -*- coding: utf-8 -*-
+"""The firmware a vendor offers for a device.
+
+A fact for the caller (docs/STRUCTURE.md): a driver may know the newer firmware
+from the vendor's download catalogue or the device's own update check; whether
+running an older one is a problem is decided above the driver. Comparing the
+vendor's version strings is vendor knowledge, so the driver says itself whether
+the offer is newer. Declared only; a driver that can tell implements it.
+"""
+
+from __future__ import annotations
+
+from typing import Optional, TYPE_CHECKING
+
+from napalm_device_types.models import FirmwareOfferDict
+
+
+class FirmwareOfferMixin:
+    if TYPE_CHECKING:  # pragma: no cover - declared for type checkers only
+
+        def get_firmware_offer(self) -> Optional[FirmwareOfferDict]:
+            """The firmware running and the newest the vendor offers.
+
+            None when the driver cannot tell for this device (an unknown model,
+            a catalogue that did not answer).
+
+            Example::
+
+                {"current_version": "1.0.2.10", "latest_version": "1.0.2.12",
+                 "newer": True, "download_url": "https://.../GS308E_1.0.2.12.zip"}
+            """
+            ...

napalm_device_types/models.py

@@ -1015,6 +1015,16 @@ class LicenseDict(TypedDict):
     withholds: NotRequired[List[str]]
 
 
+class FirmwareOfferDict(TypedDict):
+    """The firmware a device runs and the newest its vendor offers
+    (``FirmwareOfferMixin.get_firmware_offer``). A fact, not a judgement."""
+
+    current_version: str
+    latest_version: str
+    newer: bool  # the offer is newer than what runs, by the vendor's versioning
+    download_url: NotRequired[str]
+
+
 class HypervisorHostDict(TypedDict):
     """One host of a hypervisor or cluster (``HypervisorDriver.get_hypervisor_hosts``)."""
 

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "napalm-device-types"
-version = "4.15.0"
+version = "4.16.0"
 description = "Abstract device-type base classes for NAPALM drivers"
 readme = "README.md"
 requires-python = ">=3.10"

tests/test_fact_getters.py

@@ -47,3 +47,18 @@ def test_the_getters_are_declared_only():
     assert not hasattr(PackageProxyMixin, "get_package_proxy")
     assert not hasattr(LicenseMixin, "get_licenses")
     assert not hasattr(HypervisorDriver, "get_hypervisor_hosts")
+
+
+def test_a_firmware_offer_says_what_runs_and_what_is_offered():
+    """The vendor's newer firmware is a fact the driver can know (a download
+    catalogue, the device's own update check); whether it is a warning is the
+    application's call. Comparing vendor version strings stays with the driver,
+    so it says itself whether the offer is newer."""
+    from napalm_device_types import FirmwareOfferDict, FirmwareOfferMixin
+
+    hints = get_type_hints(FirmwareOfferDict)
+    assert set(hints) == {"current_version", "latest_version", "newer", "download_url"}
+    assert FirmwareOfferDict.__required_keys__ == frozenset(
+        {"current_version", "latest_version", "newer"}
+    )
+    assert not hasattr(FirmwareOfferMixin, "get_firmware_offer")