- pcap.py: parse_pcap (micro/nano, both byte orders) and parse_pcapng
(SHB byte-order, IDB linktype + if_tsresol, EPB/SPB) readers that
unwrap Ethernet/RAW/IPv4/NULL/SLL/SLL2 to UDP and extract GSMTAP-SIM
packets (APDU->tpdu, ATR->atr, PPS->pps), with a heuristic fallback
- database: insert_messages bulk-insert helper
- server: import endpoint reads raw body, auto-detects format, skips
non-GSMTAP packets; 400 'No GSMTAP data found in trace' (no session)
when empty, else creates a 'pcap' session named after the file
Tests: 102 (pcap round-trip, pcapng, no-GSMTAP, endpoint 200/400).
pcap.py: LINKTYPE_GSMTAP (155) was wrong — 155 is DLT_USER8, so
Wireshark showed 'USER 8 / DLT=155'. Now write Ethernet-encapsulated
PCAP (LINKTYPE 1): each GSMTAP message wrapped in Ethernet + IPv4 +
UDP (port 4729), with correct checksums — matching a real tcpdump
capture of GSMTAP-over-UDP and how Wireshark's gsmtap dissector is keyed.
gsmtap.py: GSMTAP_TYPE_SIM was 0x07 (WiMAX burst) — corrected to 0x04;
GSMTAP_SIM_APDU was 0x02 (PPS req) — corrected to 0x00; added PPS_REQ/
PPS_RSP. These match libosmocore/Wireshark packet-gsmtap.h.
Verified with tshark: PCAP now decodes as GSM SIM (SELECT/STATUS/ATR)
instead of 'USER 8'.
tests: pcap tests assert Ethernet linktype + framing + GSMTAP payload.
pcap.py: build_pcap(packets) — build PCAP bytes in memory (same format
as PcapWriter)
database.py: get_messages_raw() — raw elapsed/type/data without decode
server.py: GET /api/sessions/<id>/pcap generates a GSMTAP-encapsulated
PCAP (ATR/TPDU) with real timestamps and downloads it as
<session-name>.pcap (ASCII filename fallback + RFC 5987 UTF-8 for
spaces/unicode via _content_disposition)
tests: build_pcap + _content_disposition (67 total)
catarrh