Sends four crafted stimuli (UDP/closed-port, TTL=1, DF+oversized,
bad IP option) and records which ICMP error classes come back, the
per-error RTT, and the bytes echoed in each ICMP body. Absence is
as informative as a reply — Linux rate-limiting is a fingerprint signal.
Returns None when no packets could be sent (no CAP_NET_RAW), so the
probe is a no-op in non-root test environments. Port-free ActiveProbe
subclass (priority=850), metaclass auto-registered in the registry.
Also fixes three sets of stale tests left over from the TlsCertProbe
migration (4b2759e0):
- test_active_probe_registry: closed name/order sets updated for
tls_certificate and icmp_error
- test_prober_rotation: dead patches on worker.fetch_leaf_cert removed
- test_prober_worker (TestProbeCycleTLSCert): rewritten to test
TlsCertProbe as an independent registry probe, patch target updated
from worker.fetch_leaf_cert to probes.tlscert_probe.fetch_leaf_cert
anti
56229a272b