catarrh
73b0277ef7
Python-based SIMtrace2 sniffer — drop-in replacement for simtrace2-sniff. Single dependency (pyusb), auto-reconnect, GSMTAP/PCAP output, library API. Modules: protocol.py — SIMtrace2 USB sniffing protocol parser device.py — USB discovery + SniffSession with exponential backoff reconnect gsmtap.py — GSMTAP UDP sender for Wireshark pcap.py — PCAP file writer (LINKTYPE_GSMTAP) dump.py — hex dump formatters + file output __main__.py — CLI entry point Startup script sniff-start.sh handles udev permission checks and shows install instructions. udev rule uses TAG+=uaccess (systemd-logind ACL).
84 lines
2.7 KiB
Bash
Executable File
84 lines
2.7 KiB
Bash
Executable File
#!/bin/bash
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# simtrace2-pysniff startup script
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#
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# Usage: ./sniff-start.sh [--gsmtap HOST[:PORT]] [--pcap FILE] [--output FILE] [--inactivity-timeout SECONDS]
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#
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# Options set via environment variables act as defaults; CLI flags override them.
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set -euo pipefail
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shopt -s nullglob
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PROJECT_DIR="$(cd "$(dirname "$0")" && pwd)"
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GSMTAP="${GSMTAP:-}"
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PCAP="${PCAP:-}"
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OUTPUT="${OUTPUT:-}"
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INACTIVITY_TIMEOUT="${INACTIVITY_TIMEOUT:-0}"
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while [[ $# -gt 0 ]]; do
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case "$1" in
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--gsmtap) GSMTAP="$2"; shift 2 ;;
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--pcap) PCAP="$2"; shift 2 ;;
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--output|-o) OUTPUT="$2"; shift 2 ;;
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--inactivity-timeout) INACTIVITY_TIMEOUT="$2"; shift 2 ;;
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--keep-running|--no-reconnect)
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EXTRA_ARGS+=("$1"); shift ;;
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*) EXTRA_ARGS+=("$1"); shift ;;
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esac
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done
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check_permissions() {
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local bad_perms=0
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for devdir in /sys/bus/usb/devices/*/; do
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[[ -f "${devdir}busnum" ]] || continue
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[[ -f "${devdir}devnum" ]] || continue
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[[ -f "${devdir}uevent" ]] || continue
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local vid
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vid=$(grep -oP 'PRODUCT=\K[a-f0-9]+' "${devdir}uevent" 2>/dev/null || true)
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[[ "$vid" == "1d50" ]] || continue
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local busnum devnum node
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busnum=$(<"${devdir}busnum")
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devnum=$(<"${devdir}devnum")
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node=$(printf '/dev/bus/usb/%03d/%03d' "$busnum" "$devnum")
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if [[ ! -e "$node" ]]; then
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continue
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fi
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if [[ -w "$node" ]]; then
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return 0
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fi
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bad_perms=1
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echo "Permission denied on $node" >&2
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done
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if [[ $bad_perms -eq 1 ]]; then
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echo "" >&2
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echo "Install the udev rule (then reconnect the device):" >&2
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echo "──────────────────────────────────────────────────" >&2
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echo " sudo cp '$PROJECT_DIR/70-simtrace2-pysniff.rules' /etc/udev/rules.d/" >&2
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echo " sudo udevadm control --reload-rules" >&2
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echo " sudo udevadm trigger" >&2
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echo "──────────────────────────────────────────────────" >&2
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return 1
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fi
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return 0
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}
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check_permissions || exit 3
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ARGS=()
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[[ -n "$GSMTAP" ]] && ARGS+=(--gsmtap "$GSMTAP")
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[[ -n "$PCAP" ]] && ARGS+=(--pcap "$PCAP")
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[[ -n "$OUTPUT" ]] && ARGS+=(--output "$OUTPUT")
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[[ "$INACTIVITY_TIMEOUT" != "0" ]] && ARGS+=(--inactivity-timeout "$INACTIVITY_TIMEOUT")
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ARGS+=("${EXTRA_ARGS[@]}")
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echo "Starting simtrace2-pysniff..." >&2
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exec env PYTHONPATH="$PROJECT_DIR" python3 -m simtrace2_pysniff "${ARGS[@]}"
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