Werk #17588: fritz: use 64-bit counters for traffic counters if available

Component	Checks & agents
Title	fritz: use 64-bit counters for traffic counters if available
Date	Mar 5, 2025
Level	Trivial Change
Class	New Feature
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.5.0b1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.4.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

Prior to this werk, the FRITZ!Box check plugin used traffic counters that are 32-bit wide. Most current FRITZ!Box models also send additional 64-bit counters which should be used if available to avoid the risk of overflowing counters. This werk adjusts the check plugin to make use of those counters and fall back to the original 32-bit counters if they are unavailable.

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