p2p connection research

[max-mapper]

using this issue to document links to research and statistics on various p2p connection mechanisms: STUN (UDP hole punching), TCP hole punching, ICMP hole punching etc

• http://www.brynosaurus.com/pub/net/p2pnat/
  • found ~80% of routers support udp hole punching, ~60% tcp simultaneous open
  • "well known rendezvous server"
  • "hairpin translation"
  • for multi-level nats, hairpin is necessary but not very common

connection types

• direct connection
• connection relaying
• connection reversal
• udp hole punching
• tcp hole punching
• icmp hole punching

discovery types

• LAN MDNS
• LAN UPNP SSDP
• DHT
• Tracker

[mafintosh]

Does node support tcp hole punching using the net module?

[max-mapper]

@mafintosh not sure, it would need the syscalls SO_REUSEPORT and SO_REUSEADDR

[mafintosh]

@maxogden i'll look into that