From Kernel to Prometheus: High-Performance SIP Monitoring with eBPF

Monitoring large-scale VoIP networks traditionally requires application-level traffic inspection, which introduces latency that can harm call quality. This implementation leverages eBPF to move packet processing into the Linux kernel, achieving sub-microsecond latency while exporting comprehensive Prometheus metrics. The approach enables operators to track call success rates, active dialogs, and RFC-compliant performance metrics without impacting the signaling path.