dnslib 0.1.0
A DNS lookup library and command-line application.
To use this package, run the following command in your project's root directory:
Manual usage
Put the following dependency into your project's dependences section:
dnslookup
DNS resolver library and command-line app in dlang language
Features
Supported features
- DNS forward and reverse lookup over udp, tcp and tls
- Fall-back from udp to tcp as well as tls to tcp
- Record types A, NS, CNAME, SOA, PTR, MX, TXT, AAAA, SRV and DNAME
- Write raw DNS request in hex to stdout
- Read raw DNS request in hex from stdin and send request to resolver server
- Diffent levels of resolver server certificate checks
- Library and command-line app can both be build with and with-out tls support
Not supported features
- IPv6 (not tested)
- BigEndian architectures
- Multiple resolver servers per request
Library
Separate functions to generate request, query resolver server, parse query & response, validate query & response and print request & response (full as well as short versions). See command-line source code in file source/app.d for usage.
Command-line app usage
./dnslookup --help
Forward lookup
./dnslookup --name www.yahoo.com --type A --server 8.8.8.8 --udptcpport 53 --protocol udp
./dnslookup --name www.yahoo.com --type A --server 8.8.8.8 --tlsport 853 --protocol tls
./dnslookup --name www.yahoo.com --type A --server 8.8.8.8 --udptcpport 53 --protocol udptcp --recursiondesired=false
Reverse lookup
./dnslookup --name 1.2.3.4 --reverse --server 8.8.8.8 --udptcpport 53 --protocol tcp
Raw request output and input.
Output raw request and response messages
./dnslookup --name www.yahoo.com --type A --server 8.8.8.8 --protocol udp --printdata
Use raw request message for lookup.
echo "5b1f0100000100000000000003777777057961686f6f03636f6d0000010001" | ./dnslookup --hexstdin
Use raw response message without lookup. This will parse the response message (see 'QR: response') even though it says 'PRINTING REQUEST MESSAGE' and 'VALIDATING REQUEST MESSAGE: headerwrongquery_response'.
echo "5b1f8180000100030000000003777777057961686f6f03636f6d0000010001c00c000500010000003500140b6e65772d66702d73686564037767310162c010c02b0001000100000011000457f864d8c02b0001000100000011000457f864d7" | ./dnslookup --hexstdin --protocol none
Resolver server certificate checks
Different levels of certificate check in order from loose to strict
./dnslookup --name www.yahoo.com --type A --server 8.8.8.8 --tlsport 853 --protocol tls --trusted=false
./dnslookup --name www.yahoo.com --type A --server 8.8.8.8 --tlsport 853 --protocol tls --trusted=false --servername "dns.google"
./dnslookup --name www.yahoo.com --type A --server 8.8.8.8 --tlsport 853 --protocol tls --trusted=true --servername "dns.google" --trustedcertfile "/etc/ssl/certs/ca-certificates.crt"
Makefile
Build library and command-line app (tls and no-tls versions). See Makefile for how to only build some parts of the project.
make buildall
or
make buildallforce
Run unittests
make testall
- Registered by Adam Williams
- 0.1.0 released 3 years ago
- Tusanga/dnslib
- MIT
- Copyright © 2020-2021, Adam Williams
- Authors:
- Dependencies:
- vibe-core
- Versions:
-
0.1.0 2021-Jun-17 ~master 2021-Jun-17 - Download Stats:
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- Short URL:
- dnslib.dub.pm