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badguardhome/dnsfilter/rewrites_test.go
Simon Zolin 5980db1a2d + rewrites: support IP exception; support "pass A only" case 
+ rewrites: support IP exception

	host.com -> 1.2.3.4
	host.com -> AAAA

Response:

	A:
		A = 1.2.3.4
	AAAA:
		AAAA = <IPv6 address of host.com>

+ rewrites: support "pass A only" case

	host.com -> A

Response:

	A:
		A = <IPv4 address of host.com>
	AAAA:
		<empty>
2020-07-03 17:37:51 +03:00

216 lines
6.6 KiB
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package dnsfilter
import (
"net"
"testing"
"github.com/miekg/dns"
"github.com/stretchr/testify/assert"
)
func TestRewrites(t *testing.T) {
d := Dnsfilter{}
// CNAME, A, AAAA
d.Rewrites = []RewriteEntry{
RewriteEntry{"somecname", "somehost.com", 0, nil},
RewriteEntry{"somehost.com", "0.0.0.0", 0, nil},
RewriteEntry{"host.com", "1.2.3.4", 0, nil},
RewriteEntry{"host.com", "1.2.3.5", 0, nil},
RewriteEntry{"host.com", "1:2:3::4", 0, nil},
RewriteEntry{"www.host.com", "host.com", 0, nil},
}
d.prepareRewrites()
r := d.processRewrites("host2.com", dns.TypeA)
assert.Equal(t, NotFilteredNotFound, r.Reason)
r = d.processRewrites("www.host.com", dns.TypeA)
assert.Equal(t, ReasonRewrite, r.Reason)
assert.Equal(t, "host.com", r.CanonName)
assert.Equal(t, 2, len(r.IPList))
assert.True(t, r.IPList[0].Equal(net.ParseIP("1.2.3.4")))
assert.True(t, r.IPList[1].Equal(net.ParseIP("1.2.3.5")))
r = d.processRewrites("www.host.com", dns.TypeAAAA)
assert.Equal(t, ReasonRewrite, r.Reason)
assert.Equal(t, "host.com", r.CanonName)
assert.Equal(t, 1, len(r.IPList))
assert.True(t, r.IPList[0].Equal(net.ParseIP("1:2:3::4")))
// wildcard
d.Rewrites = []RewriteEntry{
RewriteEntry{"host.com", "1.2.3.4", 0, nil},
RewriteEntry{"*.host.com", "1.2.3.5", 0, nil},
}
d.prepareRewrites()
r = d.processRewrites("host.com", dns.TypeA)
assert.Equal(t, ReasonRewrite, r.Reason)
assert.True(t, r.IPList[0].Equal(net.ParseIP("1.2.3.4")))
r = d.processRewrites("www.host.com", dns.TypeA)
assert.Equal(t, ReasonRewrite, r.Reason)
assert.True(t, r.IPList[0].Equal(net.ParseIP("1.2.3.5")))
r = d.processRewrites("www.host2.com", dns.TypeA)
assert.Equal(t, NotFilteredNotFound, r.Reason)
// override a wildcard
d.Rewrites = []RewriteEntry{
RewriteEntry{"a.host.com", "1.2.3.4", 0, nil},
RewriteEntry{"*.host.com", "1.2.3.5", 0, nil},
}
d.prepareRewrites()
r = d.processRewrites("a.host.com", dns.TypeA)
assert.Equal(t, ReasonRewrite, r.Reason)
assert.True(t, len(r.IPList) == 1)
assert.True(t, r.IPList[0].Equal(net.ParseIP("1.2.3.4")))
// wildcard + CNAME
d.Rewrites = []RewriteEntry{
RewriteEntry{"host.com", "1.2.3.4", 0, nil},
RewriteEntry{"*.host.com", "host.com", 0, nil},
}
d.prepareRewrites()
r = d.processRewrites("www.host.com", dns.TypeA)
assert.Equal(t, ReasonRewrite, r.Reason)
assert.Equal(t, "host.com", r.CanonName)
assert.True(t, r.IPList[0].Equal(net.ParseIP("1.2.3.4")))
// 2 CNAMEs
d.Rewrites = []RewriteEntry{
RewriteEntry{"b.host.com", "a.host.com", 0, nil},
RewriteEntry{"a.host.com", "host.com", 0, nil},
RewriteEntry{"host.com", "1.2.3.4", 0, nil},
}
d.prepareRewrites()
r = d.processRewrites("b.host.com", dns.TypeA)
assert.Equal(t, ReasonRewrite, r.Reason)
assert.Equal(t, "host.com", r.CanonName)
assert.True(t, len(r.IPList) == 1)
assert.True(t, r.IPList[0].Equal(net.ParseIP("1.2.3.4")))
// 2 CNAMEs + wildcard
d.Rewrites = []RewriteEntry{
RewriteEntry{"b.host.com", "a.host.com", 0, nil},
RewriteEntry{"a.host.com", "x.somehost.com", 0, nil},
RewriteEntry{"*.somehost.com", "1.2.3.4", 0, nil},
}
d.prepareRewrites()
r = d.processRewrites("b.host.com", dns.TypeA)
assert.Equal(t, ReasonRewrite, r.Reason)
assert.Equal(t, "x.somehost.com", r.CanonName)
assert.True(t, len(r.IPList) == 1)
assert.True(t, r.IPList[0].Equal(net.ParseIP("1.2.3.4")))
}
func TestRewritesLevels(t *testing.T) {
d := Dnsfilter{}
// exact host, wildcard L2, wildcard L3
d.Rewrites = []RewriteEntry{
RewriteEntry{"host.com", "1.1.1.1", 0, nil},
RewriteEntry{"*.host.com", "2.2.2.2", 0, nil},
RewriteEntry{"*.sub.host.com", "3.3.3.3", 0, nil},
}
d.prepareRewrites()
// match exact
r := d.processRewrites("host.com", dns.TypeA)
assert.Equal(t, ReasonRewrite, r.Reason)
assert.Equal(t, 1, len(r.IPList))
assert.Equal(t, "1.1.1.1", r.IPList[0].String())
// match L2
r = d.processRewrites("sub.host.com", dns.TypeA)
assert.Equal(t, ReasonRewrite, r.Reason)
assert.Equal(t, 1, len(r.IPList))
assert.Equal(t, "2.2.2.2", r.IPList[0].String())
// match L3
r = d.processRewrites("my.sub.host.com", dns.TypeA)
assert.Equal(t, ReasonRewrite, r.Reason)
assert.Equal(t, 1, len(r.IPList))
assert.Equal(t, "3.3.3.3", r.IPList[0].String())
}
func TestRewritesExceptionCNAME(t *testing.T) {
d := Dnsfilter{}
// wildcard; exception for a sub-domain
d.Rewrites = []RewriteEntry{
RewriteEntry{"*.host.com", "2.2.2.2", 0, nil},
RewriteEntry{"sub.host.com", "sub.host.com", 0, nil},
}
d.prepareRewrites()
// match sub-domain
r := d.processRewrites("my.host.com", dns.TypeA)
assert.Equal(t, ReasonRewrite, r.Reason)
assert.Equal(t, 1, len(r.IPList))
assert.Equal(t, "2.2.2.2", r.IPList[0].String())
// match sub-domain, but handle exception
r = d.processRewrites("sub.host.com", dns.TypeA)
assert.Equal(t, NotFilteredNotFound, r.Reason)
}
func TestRewritesExceptionWC(t *testing.T) {
d := Dnsfilter{}
// wildcard; exception for a sub-wildcard
d.Rewrites = []RewriteEntry{
RewriteEntry{"*.host.com", "2.2.2.2", 0, nil},
RewriteEntry{"*.sub.host.com", "*.sub.host.com", 0, nil},
}
d.prepareRewrites()
// match sub-domain
r := d.processRewrites("my.host.com", dns.TypeA)
assert.Equal(t, ReasonRewrite, r.Reason)
assert.Equal(t, 1, len(r.IPList))
assert.Equal(t, "2.2.2.2", r.IPList[0].String())
// match sub-domain, but handle exception
r = d.processRewrites("my.sub.host.com", dns.TypeA)
assert.Equal(t, NotFilteredNotFound, r.Reason)
}
func TestRewritesExceptionIP(t *testing.T) {
d := Dnsfilter{}
// exception for AAAA record
d.Rewrites = []RewriteEntry{
RewriteEntry{"host.com", "1.2.3.4", 0, nil},
RewriteEntry{"host.com", "AAAA", 0, nil},
RewriteEntry{"host2.com", "::1", 0, nil},
RewriteEntry{"host2.com", "A", 0, nil},
RewriteEntry{"host3.com", "A", 0, nil},
}
d.prepareRewrites()
// match domain
r := d.processRewrites("host.com", dns.TypeA)
assert.Equal(t, ReasonRewrite, r.Reason)
assert.Equal(t, 1, len(r.IPList))
assert.Equal(t, "1.2.3.4", r.IPList[0].String())
// match exception
r = d.processRewrites("host.com", dns.TypeAAAA)
assert.Equal(t, NotFilteredNotFound, r.Reason)
// match exception
r = d.processRewrites("host2.com", dns.TypeA)
assert.Equal(t, NotFilteredNotFound, r.Reason)
// match domain
r = d.processRewrites("host2.com", dns.TypeAAAA)
assert.Equal(t, ReasonRewrite, r.Reason)
assert.Equal(t, 1, len(r.IPList))
assert.Equal(t, "::1", r.IPList[0].String())
// match exception
r = d.processRewrites("host3.com", dns.TypeA)
assert.Equal(t, NotFilteredNotFound, r.Reason)
// match domain
r = d.processRewrites("host3.com", dns.TypeAAAA)
assert.Equal(t, ReasonRewrite, r.Reason)
assert.Equal(t, 0, len(r.IPList))
}
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