NDN-FCH 2021

NDN-FCH 2021 is an online service for finding available Named Data Networking routers near the client on the global NDN testbed and other connected networks. This project started as NDN-FCH: The Big Rewrite™ at 11th NDN hackathon, and continues to be developed and maintained.

API

To find available NDN routers, send an HTTP GET request to https://fch.ndn.today/.

Query parameters:

• cap: transport protocol.
  • Acceptable values: udp, wss, or http3.
  • Default is udp.
  • This is repeatable.
• k: number of routers.
  • If this appears once, the setting applies to every transport protocol.
  • If this is repeated, each setting applies to successive transport protocols.
• ipv4: 1 to accept IPv4 routers, 0 to reject IPv4 routers.
  • Default is 1. Set to 0 if client does not have IPv4 connectivity.
• ipv6: 1 to accept IPv6 routers, 0 to reject IPv6 routers.
  • Default is 1 if the request is received over IPv6, otherwise 0.
• lon and lat: client position.
  • Default is IP geolocation.
• network: desired network.
  • Acceptable values: ndn, yoursunny.
  • Default is any.

Response format:

• Text response (default) is a comma-separated list of router hostnames.
  • This format is compatible with NDN-FCH 2016 in most cases.
  • It is not recommended to specify multiple transport protocols in the query.
• JSON response contains host:port (for UDP) or URI (for WebSocket and HTTP/3).
  • To receive JSON response, set Accept: application/json request header.

Software Components

NDN-FCH 2021 contains the following components:

• frontend
• API service
• health probe for UDP & WebSockets
• health probe for HTTP/3