-
Notifications
You must be signed in to change notification settings - Fork 1.8k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
6 changed files
with
177 additions
and
114 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,132 @@ | ||
package dnsforward | ||
|
||
import ( | ||
"net" | ||
"strings" | ||
|
||
"github.com/AdguardTeam/AdGuardHome/util" | ||
"github.com/AdguardTeam/golibs/log" | ||
"github.com/miekg/dns" | ||
) | ||
|
||
type ipsetCtx struct { | ||
ipsetList map[string][]string // domain -> []ipset_name | ||
ipsetCache map[[4]byte]bool // cache for IP[] to prevent duplicate calls to ipset program | ||
ipset6Cache map[[16]byte]bool // cache for IP[] to prevent duplicate calls to ipset program | ||
} | ||
|
||
// Convert configuration settings to an internal map | ||
// DOMAIN[,DOMAIN].../IPSET1_NAME[,IPSET2_NAME]... | ||
func (c *ipsetCtx) init(ipsetConfig []string) { | ||
c.ipsetList = make(map[string][]string) | ||
c.ipsetCache = make(map[[4]byte]bool) | ||
|
||
for _, it := range ipsetConfig { | ||
it = strings.TrimSpace(it) | ||
hostsAndNames := strings.Split(it, "/") | ||
if len(hostsAndNames) != 2 { | ||
log.Debug("IPSET: invalid value '%s'", it) | ||
continue | ||
} | ||
|
||
ipsetNames := strings.Split(hostsAndNames[1], ",") | ||
if len(ipsetNames) == 0 { | ||
log.Debug("IPSET: invalid value '%s'", it) | ||
continue | ||
} | ||
bad := false | ||
for i := range ipsetNames { | ||
ipsetNames[i] = strings.TrimSpace(ipsetNames[i]) | ||
if len(ipsetNames[i]) == 0 { | ||
bad = true | ||
break | ||
} | ||
} | ||
if bad { | ||
log.Debug("IPSET: invalid value '%s'", it) | ||
continue | ||
} | ||
|
||
hosts := strings.Split(hostsAndNames[0], ",") | ||
for _, host := range hosts { | ||
host = strings.TrimSpace(host) | ||
host = strings.ToLower(host) | ||
if len(host) == 0 { | ||
log.Debug("IPSET: invalid value '%s'", it) | ||
continue | ||
} | ||
c.ipsetList[host] = ipsetNames | ||
} | ||
} | ||
log.Debug("IPSET: added %d hosts", len(c.ipsetList)) | ||
} | ||
|
||
func (c *ipsetCtx) getIP(rr dns.RR) net.IP { | ||
switch a := rr.(type) { | ||
case *dns.A: | ||
var ip4 [4]byte | ||
copy(ip4[:], a.A.To4()) | ||
_, found := c.ipsetCache[ip4] | ||
if found { | ||
return nil // this IP was added before | ||
} | ||
c.ipsetCache[ip4] = false | ||
return a.A | ||
|
||
case *dns.AAAA: | ||
var ip6 [16]byte | ||
copy(ip6[:], a.AAAA) | ||
_, found := c.ipset6Cache[ip6] | ||
if found { | ||
return nil // this IP was added before | ||
} | ||
c.ipset6Cache[ip6] = false | ||
return a.AAAA | ||
|
||
default: | ||
return nil | ||
} | ||
} | ||
|
||
// Add IP addresses of the specified in configuration domain names to an ipset list | ||
func (c *ipsetCtx) process(ctx *dnsContext) int { | ||
req := ctx.proxyCtx.Req | ||
if !(req.Question[0].Qtype == dns.TypeA || | ||
req.Question[0].Qtype == dns.TypeAAAA) || | ||
!ctx.responseFromUpstream { | ||
return resultDone | ||
} | ||
|
||
host := req.Question[0].Name | ||
host = strings.TrimSuffix(host, ".") | ||
host = strings.ToLower(host) | ||
ipsetNames, found := c.ipsetList[host] | ||
if !found { | ||
return resultDone | ||
} | ||
|
||
log.Debug("IPSET: found ipsets %v for host %s", ipsetNames, host) | ||
|
||
for _, it := range ctx.proxyCtx.Res.Answer { | ||
ip := c.getIP(it) | ||
if ip == nil { | ||
continue | ||
} | ||
|
||
ipStr := ip.String() | ||
for _, name := range ipsetNames { | ||
code, out, err := util.RunCommand("ipset", "add", name, ipStr) | ||
if err != nil { | ||
log.Info("%s", err) | ||
return resultDone | ||
} | ||
if code != 0 { | ||
log.Info("IPSET: ipset add: code:%d output:'%s'", code, out) | ||
continue | ||
} | ||
log.Debug("IPSET: added %s(%s) -> %s", host, ipStr, name) | ||
} | ||
} | ||
|
||
return resultDone | ||
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,41 @@ | ||
package dnsforward | ||
|
||
import ( | ||
"testing" | ||
|
||
"github.com/AdguardTeam/dnsproxy/proxy" | ||
"github.com/miekg/dns" | ||
"github.com/stretchr/testify/assert" | ||
) | ||
|
||
func TestIPSET(t *testing.T) { | ||
s := Server{} | ||
s.conf.IPSETList = append(s.conf.IPSETList, "HOST.com/name") | ||
s.conf.IPSETList = append(s.conf.IPSETList, "host2.com,host3.com/name23") | ||
s.conf.IPSETList = append(s.conf.IPSETList, "host4.com/name4,name41") | ||
c := ipsetCtx{} | ||
c.init(s.conf.IPSETList) | ||
|
||
assert.Equal(t, "name", c.ipsetList["host.com"][0]) | ||
assert.Equal(t, "name23", c.ipsetList["host2.com"][0]) | ||
assert.Equal(t, "name23", c.ipsetList["host3.com"][0]) | ||
assert.Equal(t, "name4", c.ipsetList["host4.com"][0]) | ||
assert.Equal(t, "name41", c.ipsetList["host4.com"][1]) | ||
|
||
_, ok := c.ipsetList["host0.com"] | ||
assert.False(t, ok) | ||
|
||
ctx := &dnsContext{ | ||
srv: &s, | ||
} | ||
ctx.proxyCtx = &proxy.DNSContext{} | ||
ctx.proxyCtx.Req = &dns.Msg{ | ||
Question: []dns.Question{ | ||
{ | ||
Name: "host.com.", | ||
Qtype: dns.TypeA, | ||
}, | ||
}, | ||
} | ||
assert.Equal(t, resultDone, c.process(ctx)) | ||
} |