• ancillary: assorted reference materials that are useful, but not needed for normal operation of the probe
• crawler: the Scrapy spiders for obtaining a list of files to check for modification (requires Scrapy installation)
• pcaps: packet captures from past TTL probe experiments
• prelim: results of preliminary experiment to reproduce the CitizenLab's TTL probe results
• report: project results and status
• results: results from probes for GC-like activity
• scripts: some helper scripts to quickly analyze URI and results JSON files
• toronto: packet capture from the CitizenLab's Great Cannon experiments
• gcprobe.py: main GC TTL probe script
• gfwprobe.py: script to probe for GFW keyword filtering
• timeouttest.py: script to test for the time required to download a sample of JS files
• utils.py: helper methods used by multiple scripts in this repository for manipulating URIs, estimating server distances, and issuing HTTP requests