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Add PcapNG read/write with auto-detection so rdpcap(), PcapReader, and extract_flows() transparently handle both PCAP and PcapNG formats. wrpcap() auto-selects PcapNG when the path ends in .pcapng, and a new wrpcapng() function is available for explicit PcapNG writing. Add memory-budgeted streaming flow extraction: extract_flows() now streams packets from disk one at a time instead of loading all into memory. When a memory_budget is set in FlowConfig, TCP reassembly buffers automatically spill to memory-mapped temp files (via memmap2) when RAM usage exceeds the budget, and are read back on demand. Temp files are cleaned up via RAII (NamedTempFile). Also fixes pre-existing MqttSn builder test compilation errors (missing imports) and updates README with new features and protocol documentation.
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Add PcapNG read/write with auto-detection so rdpcap(), PcapReader, and extract_flows() transparently handle both PCAP and PcapNG formats. wrpcap() auto-selects PcapNG when the path ends in .pcapng, and a new wrpcapng() function is available for explicit PcapNG writing.
Add memory-budgeted streaming flow extraction: extract_flows() now streams packets from disk one at a time instead of loading all into memory. When a memory_budget is set in FlowConfig, TCP reassembly buffers automatically spill to memory-mapped temp files (via memmap2) when RAM usage exceeds the budget, and are read back on demand. Temp files are cleaned up via RAII (NamedTempFile).
Also fixes pre-existing MqttSn builder test compilation errors (missing imports) and updates README with new features and protocol documentation.