Add support for DNS stamps and for DNSCrypt servers
This allows connections to DoH servers using their stamp, and adds support for DNSCrypt servers by the way.pull/19/head
Frank Denis
Karan Sharma
parent
48fd5bb792
commit
6d2eae4f58
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@ -12,7 +12,7 @@
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---
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**doggo** is a modern command-line DNS client (like _dig_) written in Golang. It outputs information in a neat concise manner and supports protocols like DoH, DoT as well.
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**doggo** is a modern command-line DNS client (like _dig_) written in Golang. It outputs information in a neat concise manner and supports protocols like DoH, DoT and DNSCrypt as well.
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It's totally inspired from [dog](https://github.com/ogham/dog/) which is written in Rust. I wanted to add some features to it but since I don't know Rust, I found it as a nice opportunity
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to experiment with writing a DNS Client from scratch in `Go` myself. Hence the name `dog` +`go` => **doggo**.
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@ -195,6 +195,8 @@ URL scheme of the server is used to identify which resolver to use for lookups.
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@tcp:// eg: @1.1.1.1 initiates a TCP resolver for 1.1.1.1:53.
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@https:// eg: @https://cloudflare-dns.com/dns-query initiates a DOH resolver for Cloudflare DoH server.
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@tls:// eg: @1.1.1.1 initiates a DoT resolver for 1.1.1.1:853.
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@sdns:// eg: @sdns://AgcAAAAAAAAABzEuMC4wLjEAEmRucy5jbG91ZGZsYXJlLmNvbQovZG5zLXF1ZXJ5
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initiates a DNSCrypt or DoH resolver using its DNS stamp
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```
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### Query Options
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@ -36,6 +36,7 @@ var appHelpTextTemplate = `{{ "NAME" | color "" "heading" }}:
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{{"@tcp://" | color "yellow" ""}} eg: @tcp://1.1.1.1 initiates a {{"TCP" | color "cyan" ""}} resolver for 1.1.1.1:53.
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{{"@https://" | color "yellow" ""}} eg: @https://cloudflare-dns.com/dns-query initiates a {{"DOH" | color "cyan" ""}} resolver for Cloudflare DoH server.
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{{"@tls://" | color "yellow" ""}} eg: @tls://1.1.1.1 initiates a {{"DoT" | color "cyan" ""}} resolver for 1.1.1.1:853.
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{{"@sdns://" | color "yellow" ""}} initiates a {{"DNSCrypt" | color "cyan" ""}} or {{"DoH" | color "cyan" ""}} resolver using its DNS stamp.
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{{ "Query Options" | color "" "heading" }}:
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{{"-q, --query=HOSTNAME" | color "yellow" ""}} Hostname to query the DNS records for (eg {{"mrkaran.dev" | color "cyan" ""}}).
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@ -12,7 +12,7 @@ complete -c doggo -s 'n' -l 'nameserver' -d "Address of a specific nameserver to
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complete -c doggo -s 'c' -l 'class' -d "Network class of the DNS record being queried" -x -a "IN CH HS"
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# Transport options
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complete -c doggo -x -a "@udp:// @tcp:// @https:// @tls://" -d "Select the protocol for resolving queries"
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complete -c doggo -x -a "@udp:// @tcp:// @https:// @tls:// @sdns://" -d "Select the protocol for resolving queries"
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# Resolver options
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complete -c doggo -l 'ndots' -d "Specify ndots parameter. Takes value from /etc/resolv.conf if using the system namesever or 1 otherwise"
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3
go.mod
3
go.mod
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@ -3,9 +3,10 @@ module github.com/mr-karan/doggo
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go 1.16
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require (
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github.com/ameshkov/dnscrypt v1.1.0
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github.com/ameshkov/dnsstamps v1.0.3
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github.com/fatih/color v1.10.0
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github.com/go-chi/chi v1.5.3
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github.com/go-chi/render v1.0.1
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github.com/knadh/koanf v0.14.0
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github.com/mattn/go-runewidth v0.0.9 // indirect
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github.com/miekg/dns v1.1.35
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20
go.sum
20
go.sum
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@ -1,4 +1,14 @@
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github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
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github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
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github.com/aead/chacha20 v0.0.0-20180709150244-8b13a72661da h1:KjTM2ks9d14ZYCvmHS9iAKVt9AyzRSqNU1qabPih5BY=
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github.com/aead/chacha20 v0.0.0-20180709150244-8b13a72661da/go.mod h1:eHEWzANqSiWQsof+nXEI9bUVUyV6F53Fp89EuCh2EAA=
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github.com/aead/poly1305 v0.0.0-20180717145839-3fee0db0b635 h1:52m0LGchQBBVqJRyYYufQuIbVqRawmubW3OFGqK1ekw=
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github.com/aead/poly1305 v0.0.0-20180717145839-3fee0db0b635/go.mod h1:lmLxL+FV291OopO93Bwf9fQLQeLyt33VJRUg5VJ30us=
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github.com/ameshkov/dnscrypt v1.1.0 h1:2vAt5dD6ZmqlAxEAfzRcLBnkvdf8NI46Kn9InSwQbSI=
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github.com/ameshkov/dnscrypt v1.1.0/go.mod h1:ikduAxNLCTEfd1AaCgpIA5TgroIVQ8JY3Vb095fiFJg=
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github.com/ameshkov/dnsstamps v1.0.1/go.mod h1:Ii3eUu73dx4Vw5O4wjzmT5+lkCwovjzaEZZ4gKyIH5A=
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github.com/ameshkov/dnsstamps v1.0.3 h1:Srzik+J9mivH1alRACTbys2xOxs0lRH9qnTA7Y1OYVo=
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github.com/ameshkov/dnsstamps v1.0.3/go.mod h1:Ii3eUu73dx4Vw5O4wjzmT5+lkCwovjzaEZZ4gKyIH5A=
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github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
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github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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@ -9,8 +19,6 @@ github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWo
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github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
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github.com/go-chi/chi v1.5.3 h1:+DVDS9/D3MTbEu3WrrH3oz9oP6PlSPSNj8LLw3X17yU=
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github.com/go-chi/chi v1.5.3/go.mod h1:Q8xfe6s3fjZyMr8ZTv5jL+vxhVaFyCq2s+RvSfzTD0E=
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github.com/go-chi/render v1.0.1 h1:4/5tis2cKaNdnv9zFLfXzcquC9HbeZgCnxGnKrltBS8=
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github.com/go-chi/render v1.0.1/go.mod h1:pq4Rr7HbnsdaeHagklXub+p6Wd16Af5l9koip1OvJns=
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github.com/hashicorp/hcl v1.0.0 h1:0Anlzjpi4vEasTeNFn2mLJgTSwt0+6sfsiTG8qcWGx4=
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github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
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github.com/joho/godotenv v1.3.0 h1:Zjp+RcGpHhGlrMbJzXTrZZPrWj+1vfm90La1wgB6Bhc=
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@ -24,6 +32,7 @@ github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Ky
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github.com/mattn/go-runewidth v0.0.7/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
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github.com/mattn/go-runewidth v0.0.9 h1:Lm995f3rfxdpd6TSmuVCHVb/QhupuXlYr8sCI/QdE+0=
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github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
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github.com/miekg/dns v1.1.29/go.mod h1:KNUDUusw/aVsxyTYZM1oqvCicbwhgbNgztCETuNZ7xM=
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github.com/miekg/dns v1.1.35 h1:oTfOaDH+mZkdcgdIjH6yBajRGtIwcwcaR+rt23ZSrJs=
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github.com/miekg/dns v1.1.35/go.mod h1:KNUDUusw/aVsxyTYZM1oqvCicbwhgbNgztCETuNZ7xM=
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github.com/mitchellh/mapstructure v1.2.2 h1:dxe5oCinTXiTIcfgmZecdCzPmAJKd46KsCWc35r0TV4=
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@ -45,13 +54,15 @@ github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UV
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github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
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github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
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golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550 h1:ObdrDkeb4kJdCP557AjRjq69pTHfNouLtWZG7j9rPN8=
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golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
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golang.org/x/crypto v0.0.0-20200323165209-0ec3e9974c59 h1:3zb4D3T4G8jdExgVU/95+vQXfpEPiMdCaZgmGVxjNHM=
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golang.org/x/crypto v0.0.0-20200323165209-0ec3e9974c59/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
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golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
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golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
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golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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golang.org/x/net v0.0.0-20190923162816-aa69164e4478 h1:l5EDrHhldLYb3ZRHDUhXF7Om7MvYXnkV9/iQNo1lX6g=
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golang.org/x/net v0.0.0-20190923162816-aa69164e4478/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e h1:3G+cUijn7XD+S4eJFddp53Pv7+slrESplyjG25HgL+k=
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golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
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golang.org/x/sync v0.0.0-20190423024810-112230192c58 h1:8gQV6CLnAEikrhgkHFbMAEhagSSnXWGV915qUMm9mrU=
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golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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@ -61,6 +72,7 @@ golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7w
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golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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golang.org/x/sys v0.0.0-20200331124033-c3d80250170d h1:nc5K6ox/4lTFbMVSL9WRR81ixkcwXThoiF6yf+R9scA=
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golang.org/x/sys v0.0.0-20200331124033-c3d80250170d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
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@ -5,6 +5,7 @@ import (
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"net"
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"net/url"
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"github.com/ameshkov/dnsstamps"
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"github.com/mr-karan/doggo/pkg/config"
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"github.com/mr-karan/doggo/pkg/models"
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)
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@ -60,6 +61,23 @@ func initNameserver(n string) (models.Nameserver, error) {
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if err != nil {
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return ns, err
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}
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if u.Scheme == "sdns" {
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stamp, err := dnsstamps.NewServerStampFromString(n)
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if err != nil {
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return ns, err
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}
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switch stamp.Proto {
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case dnsstamps.StampProtoTypeDoH:
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ns.Type = models.DOHResolver
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address := url.URL{Scheme: "https", Host: stamp.ProviderName, Path: stamp.Path}
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ns.Address = address.String()
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case dnsstamps.StampProtoTypeDNSCrypt:
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ns.Type = models.DNSCryptResolver
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ns.Address = n
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default:
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return ns, fmt.Errorf("unsupported protocol: %v", stamp.Proto.String())
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}
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}
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if u.Scheme == "https" {
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ns.Type = models.DOHResolver
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ns.Address = u.String()
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@ -13,6 +13,7 @@ const (
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DOHResolver = "doh"
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TCPResolver = "tcp"
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DOTResolver = "dot"
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DNSCryptResolver = "dnscrypt"
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)
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// QueryFlags is used store the query params
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@ -0,0 +1,81 @@
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package resolvers
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import (
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"github.com/ameshkov/dnscrypt"
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"github.com/miekg/dns"
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"github.com/sirupsen/logrus"
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)
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// DNSCryptResolver represents the config options for setting up a Resolver.
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type DNSCryptResolver struct {
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client *dnscrypt.Client
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serverInfo *dnscrypt.ServerInfo
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server string
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resolverOptions Options
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}
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// DNSCryptResolverOpts holds options for setting up a DNSCrypt resolver.
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type DNSCryptResolverOpts struct {
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IPv4Only bool
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IPv6Only bool
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UseTLS bool
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UseTCP bool
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}
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// NewDNSCryptResolver accepts a list of nameservers and configures a DNS resolver.
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func NewDNSCryptResolver(server string, dnscryptOpts DNSCryptResolverOpts, resolverOpts Options) (Resolver, error) {
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net := "udp"
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if dnscryptOpts.UseTCP {
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net = "tcp"
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}
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client := &dnscrypt.Client{Proto: net, AdjustPayloadSize: true}
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serverInfo, _, err := client.Dial(server)
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if err != nil {
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return nil, err
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}
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return &DNSCryptResolver{
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client: client,
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serverInfo: serverInfo,
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server: server,
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resolverOptions: resolverOpts,
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}, nil
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}
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// Lookup takes a dns.Question and sends them to DNS Server.
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// It parses the Response from the server in a custom output format.
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func (r *DNSCryptResolver) Lookup(question dns.Question) (Response, error) {
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var (
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rsp Response
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messages = prepareMessages(question, r.resolverOptions.Ndots, r.resolverOptions.SearchList)
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)
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for _, msg := range messages {
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r.resolverOptions.Logger.WithFields(logrus.Fields{
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"domain": msg.Question[0].Name,
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"ndots": r.resolverOptions.Ndots,
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"nameserver": r.serverInfo.ProviderName,
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}).Debug("Attempting to resolve")
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in, rtt, err := r.client.Exchange(&msg, r.serverInfo)
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if err != nil {
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return rsp, err
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}
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// pack questions in output.
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for _, q := range msg.Question {
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ques := Question{
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Name: q.Name,
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Class: dns.ClassToString[q.Qclass],
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Type: dns.TypeToString[q.Qtype],
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}
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rsp.Questions = append(rsp.Questions, ques)
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}
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// get the authorities and answers.
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output := parseMessage(in, rtt, r.server)
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rsp.Authorities = output.Authorities
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rsp.Answers = output.Answers
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if len(output.Answers) > 0 {
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// stop iterating the searchlist.
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break
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}
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}
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return rsp, nil
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}
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@ -127,6 +127,17 @@ func LoadResolvers(opts Options) ([]Resolver, error) {
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}
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rslvrs = append(rslvrs, rslvr)
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}
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if ns.Type == models.DNSCryptResolver {
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opts.Logger.Debug("initiating DNSCrypt resolver")
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rslvr, err := NewDNSCryptResolver(ns.Address,
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DNSCryptResolverOpts{
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UseTCP: false,
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}, resolverOpts)
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if err != nil {
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return rslvrs, err
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}
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rslvrs = append(rslvrs, rslvr)
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}
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}
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return rslvrs, nil
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}
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Loading…
Reference in New Issue