DNS library in Go
Go
Pull request Compare This branch is 482 commits behind miekg:master.
Latest commit cd2048a Nov 20, 2014 @miekg miekg Add Unsafe member to dns.Server
This stops it from checking if the incoming requests have the QR bit
unset, so be careful when enabling this. This can be useful in
combination with mDNS.

Also the check for only 1 question in the question section is relaxed
to be "at least one", even without setting Unsafe!

Also update TestServingResponse to test for Unsafe vs not using Unsafe.
Permalink
Failed to load latest commit information.
idn Added examples for Punycode lib. Makes godoc look pretty. Sep 18, 2014
.gitignore gitignore update Oct 15, 2013
.travis.yml Do test -short in travis as well Nov 12, 2014
AUTHORS add AUTHOR file Feb 10, 2014
CONTRIBUTORS Changed logic to typeswitch and added comments. Sep 20, 2014
COPYRIGHT Remove all copyright notices Sep 11, 2014
LICENSE Update the copy right for the original GO files May 12, 2013
README.md Merge branch 'master' of github.com:miekg/dns Nov 3, 2014
client.go Remove all copyright notices Sep 11, 2014
client_test.go Move tests and start update_test.go Nov 9, 2014
clientconfig.go Remove all copyright notices Sep 11, 2014
defaults.go Fix: drop requests with *cough* qr set. Oct 19, 2014
dns.go Lots of renamed funcs and structures. More readability. Sep 20, 2014
dns_test.go Reduce amount of work done when unpacking unprintable characters. Nov 6, 2014
dnssec.go Merge branch 'master' of github.com:miekg/dns Nov 3, 2014
dnssec_test.go go test -short Nov 12, 2014
dyn_test.go Remove all copyright notices Sep 11, 2014
edns.go fix buffer overrun in unpack() Nov 4, 2014
edns_test.go Fixup tests Oct 8, 2014
example_test.go DNSSEC algorithm and digest types now uint8 Oct 23, 2014
keygen.go Remove all copyright notices Sep 11, 2014
kscan.go Remove all copyright notices Sep 11, 2014
labels.go extra docs Sep 21, 2014
labels_test.go Remove all copyright notices Sep 11, 2014
msg.go Make TestDynamicUpdateZeroRdataUnpack pass Nov 12, 2014
nsecx.go Remove all copyright notices Sep 11, 2014
nsecx_test.go Remove all copyright notices Sep 11, 2014
parse_test.go go test -short Nov 12, 2014
privaterr.go Attempting to fix #133 Sep 24, 2014
privaterr_test.go tests: remove parse_test.db Oct 6, 2014
rawmsg.go Remove all copyright notices Sep 11, 2014
scanner.go Remove all copyright notices Sep 11, 2014
server.go Add Unsafe member to dns.Server Nov 19, 2014
server_test.go Add Unsafe member to dns.Server Nov 19, 2014
sig0.go Fix package header Nov 3, 2014
sig0_test.go go test -short Nov 12, 2014
singleinflight.go Implement outstanding query detection. Aug 24, 2013
tlsa.go Remove all copyright notices Sep 11, 2014
tsig.go Fix tsig fudge factor Nov 11, 2014
types.go Update test and gofmt Nov 9, 2014
udp.go Remove all copyright notices Sep 11, 2014
udp_linux.go Remove all copyright notices Sep 11, 2014
udp_other.go Remove all copyright notices Sep 11, 2014
udp_windows.go Remove all copyright notices Sep 11, 2014
update.go Lose a loop in Msg.RemoveRRset() and use copyHeader() Nov 12, 2014
update_test.go Test that Msg.RemoveRRset() works as intended Nov 12, 2014
xfr.go Remove all copyright notices Sep 11, 2014
zgenerate.go Remove all copyright notices Sep 11, 2014
zscan.go Merge pull request #127 from asergeyev/txtescapezscan Sep 12, 2014
zscan_rr.go Update test and gofmt Nov 9, 2014

README.md

Build Status

Alternative (more granular) approach to a DNS library

Less is more.

Complete and usable DNS library. All 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. Server side and client side programming is supported, i.e. you can build servers and resolvers with it.

If you like this, you may also be interested in:

Goals

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

Users

A not-so-up-to-date-list-that-may-be-actually-current:

Send pull request if you want to be listed here.

Features

  • UDP/TCP queries, IPv4 and IPv6;
  • RFC 1035 zone file parsing ($INCLUDE, $ORIGIN, $TTL and $GENERATE (for all record types) are supported;
  • Fast:
    • Reply speed around ~ 80K qps (faster hardware results in more qps);
    • Parsing RRs ~ 100K RR/s, that's 5M records in about 50 seconds;
  • Server side programming (mimicking the net/http package);
  • Client side programming;
  • DNSSEC: signing, validating and key generation for DSA, RSA and ECDSA;
  • EDNS0, NSID;
  • AXFR/IXFR;
  • TSIG, SIG(0);
  • DNS name compression;
  • Depends only on the standard library.

Have fun!

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

Building

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

go get github.com/miekg/dns
go build github.com/miekg/dns

Examples

A short "how to use the API" is at the beginning of dns.go (this also will show when you call godoc github.com/miekg/dns).

Example programs can be found in the github.com/miekg/exdns repository.

Supported RFCs

all of them

  • 103{4,5} - DNS standard
  • 1348 - NSAP record
  • 1982 - Serial Arithmetic
  • 1876 - LOC record
  • 1995 - IXFR
  • 1996 - DNS notify
  • 2136 - DNS Update (dynamic updates)
  • 2181 - RRset definition - there is no RRset type though, just []RR
  • 2537 - RSAMD5 DNS keys
  • 2065 - DNSSEC (updated in later RFCs)
  • 2671 - EDNS record
  • 2782 - SRV record
  • 2845 - TSIG record
  • 2915 - NAPTR record
  • 2929 - DNS IANA Considerations
  • 3110 - RSASHA1 DNS keys
  • 3225 - DO bit (DNSSEC OK)
  • 340{1,2,3} - NAPTR record
  • 3445 - Limiting the scope of (DNS)KEY
  • 3597 - Unkown RRs
  • 403{3,4,5} - DNSSEC + validation functions
  • 4255 - SSHFP record
  • 4343 - Case insensitivity
  • 4408 - SPF record
  • 4509 - SHA256 Hash in DS
  • 4592 - Wildcards in the DNS
  • 4635 - HMAC SHA TSIG
  • 4701 - DHCID
  • 4892 - id.server
  • 5001 - NSID
  • 5155 - NSEC3 record
  • 5205 - HIP record
  • 5702 - SHA2 in the DNS
  • 5936 - AXFR
  • 5966 - TCP implementation recommendations
  • 6605 - ECDSA
  • 6725 - IANA Registry Update
  • 6742 - ILNP DNS
  • 6891 - EDNS0 update
  • 6895 - DNS IANA considerations
  • 6975 - Algorithm Understanding in DNSSEC
  • 7043 - EUI48/EUI64 records
  • 7314 - DNS (EDNS) EXPIRE Option
  • xxxx - URI record (draft)
  • xxxx - EDNS0 DNS Update Lease (draft)

Loosely based upon

  • ldns
  • NSD
  • Net::DNS
  • GRONG

TODO

  • privatekey.Precompute() when signing?
  • Last remaining RRs: APL, ATMA, A6 and NXT;
  • Missing in parsing: ISDN, UNSPEC, ATMA;
  • CAA parsing is broken;
  • NSEC(3) cover/match/closest enclose;
  • Replies with TC bit are not parsed to the end;
  • Create IsMsg to validate a message before fully parsing it.