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README.markdown

Alternative (more granular) approach to a DNS library.

Less is more.

Complete and usable DNS library. Most widely used Resource Records are supported, including the DNSSEC types. It follows a lean and mean philosophy. If there is stuff you should know as a DNS programmer there isn't a convenience function for it.

Goals:

  • KISS;
  • Small API;
  • If its easy to code in Go, don't make a function of it.

Features:

  • UDP/TCP queries, IPv4 and IPv6;
  • RFC 1035 zone file parsing;
  • Fast:
    • reply speed around 35K qps (Faster hardware -> more qps);
    • Parsing RRs (zone files) with 35K RR/s, that 5M records in about 142 seconds;
    • This is expected to be optimized further.
  • Client and server side programming (mimicking the http package);
  • Asynchronous queries for client and server;
  • DNSSEC;
  • EDNS0;
  • AXFR/IXFR;
  • TSIG;
  • DNS name compression.

Building is done with the go tool. If you have setup your GOPATH correctly the following should work:

go build dns

Sample programs can be found in the ex directory. They can be build with: make ex (after the dns package has been installed)

Have fun!

Miek Gieben - 2010-2012 - miek@miek.nl

Supported RFCs

All of them:

  • 103{4,5} - DNS standard
  • 1982 - Serial Arithmetic
  • 1876 - LOC record (incomplete)
  • 1995 - IXFR
  • 1996 - DNS notify
  • 2136 - DNS Update (dynamic updates)
  • 2181 - RRset definition
  • 2537 - RSAMD5 DNS keys
  • 2065 - DNSSEC (updated in later RFCs)
  • 2671 - EDNS
  • 2782 - SRV
  • 2845 - TSIG
  • 2915 - NAPTR
  • 3110 - RSASHA1 DNS keys
  • 3225 - DO bit (DNSSEC OK)
  • 340{1,2,3} - NAPTR
  • 3597 - Unkown RRs
  • 403{3,4,5} - DNSSEC + validation functions
  • 4255 - SSHFP
  • 4408 - SPF
  • 4509 - SHA256 Hash in DS
  • 4635 - HMAC SHA TSIG
  • 4892 - id.server
  • 5001 - NSID
  • 5155 - NSEC3
  • 5933 - GOST
  • 5936 - AXFR
  • xxxx - ECDSA

Loosely based upon:

  • ldns
  • NSD
  • Net::DNS
  • GRONG