Move to new torrent libtorrent

Signed-off-by: Miek Gieben <miek@miek.nl>

12 files changed, 25 insertions, 312 deletions

diff --git a/core/dnsserver/zdirectives.go b/core/dnsserver/zdirectives.go
index b01118a01..6c700304b 100644
--- a/core/dnsserver/zdirectives.go
+++ b/core/dnsserver/zdirectives.go
@@ -55,5 +55,5 @@ var Directives = []string{
 	"whoami",
 	"on",
 	"sign",
-	"torrent",
+	"bittorrent",
 }
diff --git a/core/plugin/zplugin.go b/core/plugin/zplugin.go
index 7c43917e0..62985edca 100644
--- a/core/plugin/zplugin.go
+++ b/core/plugin/zplugin.go
@@ -11,6 +11,7 @@ import (
 	_ "github.com/coredns/coredns/plugin/autopath"
 	_ "github.com/coredns/coredns/plugin/azure"
 	_ "github.com/coredns/coredns/plugin/bind"
+	_ "github.com/coredns/coredns/plugin/bittorrent"
 	_ "github.com/coredns/coredns/plugin/bufsize"
 	_ "github.com/coredns/coredns/plugin/cache"
 	_ "github.com/coredns/coredns/plugin/cancel"
@@ -46,7 +47,6 @@ import (
 	_ "github.com/coredns/coredns/plugin/sign"
 	_ "github.com/coredns/coredns/plugin/template"
 	_ "github.com/coredns/coredns/plugin/tls"
-	_ "github.com/coredns/coredns/plugin/torrent"
 	_ "github.com/coredns/coredns/plugin/trace"
 	_ "github.com/coredns/coredns/plugin/transfer"
 	_ "github.com/coredns/coredns/plugin/whoami"
diff --git a/go.mod b/go.mod
index 4cfb3545f..0be183736 100644
--- a/go.mod
+++ b/go.mod
@@ -8,6 +8,7 @@ require (
 	github.com/Azure/go-autorest/autorest/azure/auth v0.5.0
 	github.com/DataDog/datadog-go v3.5.0+incompatible // indirect
 	github.com/Shopify/sarama v1.21.0 // indirect
+	github.com/anacrolix/torrent v1.0.0
 	github.com/apache/thrift v0.13.0 // indirect
 	github.com/aws/aws-sdk-go v1.33.7
 	github.com/caddyserver/caddy v1.0.5
diff --git a/go.sum b/go.sum
index cb568ede6..c392cb98a 100644
--- a/go.sum
+++ b/go.sum
@@ -74,6 +74,7 @@ github.com/NYTimes/gziphandler v0.0.0-20170623195520-56545f4a5d46/go.mod h1:3wb0
 github.com/OpenDNS/vegadns2client v0.0.0-20180418235048-a3fa4a771d87/go.mod h1:iGLljf5n9GjT6kc0HBvyI1nOKnGQbNB66VzSNbK5iks=
 github.com/PuerkitoBio/purell v1.0.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
 github.com/PuerkitoBio/urlesc v0.0.0-20160726150825-5bd2802263f2/go.mod h1:uGdkoq3SwY9Y+13GIhn11/XLaGBb4BfwItxLd5jeuXE=
+github.com/RoaringBitmap/roaring v0.4.7 h1:eGUudvFzvF7Kxh7JjYvXfI1f7l22/2duFby7r5+d4oc=
 github.com/RoaringBitmap/roaring v0.4.7/go.mod h1:8khRDP4HmeXns4xIj9oGrKSz7XTQiJx2zgh7AcNke4w=
 github.com/SermoDigital/jose v0.0.0-20180104203859-803625baeddc/go.mod h1:ARgCUhI1MHQH+ONky/PAtmVHQrP5JlGY0F3poXOp/fA=
 github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWXgklEdEo=
@@ -92,24 +93,33 @@ github.com/alicebob/miniredis v2.4.6+incompatible/go.mod h1:8HZjEj4yU0dwhYHky+Dx
 github.com/aliyun/alibaba-cloud-sdk-go v0.0.0-20190808125512-07798873deee/go.mod h1:myCDvQSzCW+wB1WAlocEru4wMGJxy+vlxHdhegi1CDQ=
 github.com/aliyun/aliyun-oss-go-sdk v0.0.0-20190307165228-86c17b95fcd5/go.mod h1:T/Aws4fEfogEE9v+HPhhw+CntffsBHJ8nXQCwKr0/g8=
 github.com/anacrolix/dht v0.0.0-20180412060941-24cbf25b72a4/go.mod h1:hQfX2BrtuQsLQMYQwsypFAab/GvHg8qxwVi4OJdR1WI=
+github.com/anacrolix/dht v0.0.0-20181129074040-b09db78595aa h1:5RyX9Tvqa9oewlJhFihkxe8biS0ojTlrNU3ryqm5g2s=
 github.com/anacrolix/dht v0.0.0-20181129074040-b09db78595aa/go.mod h1:Ayu4t+5TsHQ07/P8XzRJqVofv7lU4R1ZTT7KW5+SPFA=
+github.com/anacrolix/envpprof v0.0.0-20180404065416-323002cec2fa h1:xCaATLKmn39QqLs3tUZYr6eKvezJV+FYvVOLTklxK6U=
 github.com/anacrolix/envpprof v0.0.0-20180404065416-323002cec2fa/go.mod h1:KgHhUaQMc8cC0+cEflSgCFNFbKwi5h54gqtVn8yhP7c=
 github.com/anacrolix/go-libutp v0.0.0-20180522111405-6baeb806518d/go.mod h1:beQSaSxwH2d9Eeu5ijrEnHei5Qhk+J6cDm1QkWFru4E=
+github.com/anacrolix/go-libutp v0.0.0-20180808010927-aebbeb60ea05 h1:Zoniih3jyqtr3I0xFoMvw1USWpg+CbI/zOrcLudr0lc=
 github.com/anacrolix/go-libutp v0.0.0-20180808010927-aebbeb60ea05/go.mod h1:POY/GPlrFKRxnOKH1sGAB+NBWMoP+sI+hHJxgcgWbWw=
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 github.com/anacrolix/tagflag v0.0.0-20180109131632-2146c8d41bf0/go.mod h1:1m2U/K6ZT+JZG0+bdMK6qauP49QT4wE5pmhJXOKKCHw=
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 github.com/anacrolix/torrent v0.0.0-20180622074351-fefeef4ee9eb/go.mod h1:3vcFVxgOASslNXHdivT8spyMRBanMCenHRpe0u5vpBs=
+github.com/anacrolix/torrent v1.0.0 h1:MxNBr5lKDK/fRtvAYPOzGGQrpj+70Lh7E5EVjzIIbXg=
 github.com/anacrolix/torrent v1.0.0/go.mod h1:N6lCILah/qQCk/gVjHsOnqaug7a5DqQyryCbZD1L188=
+github.com/anacrolix/utp v0.0.0-20180219060659-9e0e1d1d0572 h1:kpt6TQTVi6gognY+svubHfxxpq0DLU9AfTQyZVc3UOc=
 github.com/anacrolix/utp v0.0.0-20180219060659-9e0e1d1d0572/go.mod h1:MDwc+vsGEq7RMw6lr2GKOEqjWny5hO5OZXRVNaBJ2Dk=
 github.com/apache/thrift v0.12.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
 github.com/apache/thrift v0.13.0 h1:5hryIiq9gtn+MiLVn0wP37kb/uTeRZgN08WoCsAhIhI=
@@ -123,9 +133,11 @@ github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+Ce
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
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 github.com/boltdb/bolt v1.3.1/go.mod h1:clJnj/oiGkjum5o1McbSZDSLxVThjynRyGBgiAx27Ps=
 github.com/br0xen/termbox-util v0.0.0-20170904143325-de1d4c83380e/go.mod h1:x9wJlgOj74OFTOBwXOuO8pBguW37EgYNx51Dbjkfzo4=
 github.com/br0xen/termbox-util v0.0.0-20200220160819-dc6d6950ba00/go.mod h1:x9wJlgOj74OFTOBwXOuO8pBguW37EgYNx51Dbjkfzo4=
+github.com/bradfitz/iter v0.0.0-20140124041915-454541ec3da2 h1:1B/+1BcRhOMG1KH/YhNIU8OppSWk5d/NGyfRla88CuY=
 github.com/bradfitz/iter v0.0.0-20140124041915-454541ec3da2/go.mod h1:PyRFw1Lt2wKX4ZVSQ2mk+PeDa1rxyObEDlApuIsUKuo=
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@@ -187,8 +199,10 @@ github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21/go.mod h1
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 github.com/edsrzf/mmap-go v0.0.0-20170320065105-0bce6a688712/go.mod h1:YO35OhQPt3KJa3ryjFM5Bs14WD66h8eGKpfaBNrHW5M=
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 github.com/edsrzf/mmap-go v1.0.0/go.mod h1:YO35OhQPt3KJa3ryjFM5Bs14WD66h8eGKpfaBNrHW5M=
 github.com/elazarl/goproxy v0.0.0-20180725130230-947c36da3153/go.mod h1:/Zj4wYkgs4iZTTu3o/KG3Itv/qCCa8VVMlb3i9OVuzc=
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@@ -210,6 +224,7 @@ github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
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@@ -336,6 +351,7 @@ github.com/hashicorp/golang-lru v0.5.4/go.mod h1:iADmTwqILo4mZ8BN3D2Q6+9jd8WM5uG
 github.com/hokaccha/go-prettyjson v0.0.0-20190818114111-108c894c2c0e/go.mod h1:pFlLw2CfqZiIBOx6BuCeRLCrfxBJipTY0nIOF/VbGcI=
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@@ -408,6 +424,7 @@ github.com/mattn/go-runewidth v0.0.3/go.mod h1:LwmH8dsx7+W8Uxz3IHJYH5QSwggIsqBzp
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@@ -466,6 +483,7 @@ github.com/onsi/gomega v0.0.0-20170829124025-dcabb60a477c/go.mod h1:C1qb7wdrVGGV
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@@ -528,6 +546,7 @@ github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6So
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@@ -575,7 +594,9 @@ github.com/urfave/cli v1.22.1/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtX
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 github.com/willf/bitset v1.1.3/go.mod h1:RjeCKbqT1RxIR/KWY6phxZiaY1IyutSBfGjNPySAYV4=
+github.com/willf/bitset v1.1.9 h1:GBtFynGY9ZWZmEC9sWuu41/7VBXPFCOAbCbqTflOg9c=
 github.com/willf/bitset v1.1.9/go.mod h1:RjeCKbqT1RxIR/KWY6phxZiaY1IyutSBfGjNPySAYV4=
+github.com/willf/bloom v0.0.0-20170505221640-54e3b963ee16 h1:hDGatoumfYOxzIZGsSylJuxTzu9k86BJl8OQhm72anI=
 github.com/willf/bloom v0.0.0-20170505221640-54e3b963ee16/go.mod h1:MmAltL9pDMNTrvUkxdg0k0q5I0suxmuwp3KbyrZLOZ8=
 github.com/xeipuuv/gojsonpointer v0.0.0-20180127040702-4e3ac2762d5f/go.mod h1:N2zxlSyiKSe5eX1tZViRH5QA0qijqEDrYZiPEAiq3wU=
 github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415/go.mod h1:GwrjFmJcFw6At/Gs6z4yjiIwzuJ1/+UwLxMQDVQXShQ=
diff --git a/plugin.cfg b/plugin.cfg
index 27137fec4..ae8ef01fd 100644
--- a/plugin.cfg
+++ b/plugin.cfg
@@ -64,4 +64,4 @@ erratic:erratic
 whoami:whoami
 on:github.com/caddyserver/caddy/onevent
 sign:sign
-torrent:torrent
+bittorrent:bittorrent
diff --git a/plugin/torrent/README.md b/plugin/torrent/README.md
deleted file mode 100644
index 1cc273c41..000000000
--- a/plugin/torrent/README.md
+++ /dev/null
@@ -1,48 +0,0 @@
-# torrent
-
-## Name
-
-*torrent* - use BitTorrent to disseminate zone data.
-
-## Description
-
-The *torrent* plugin uses the BitTorrent protocol to disseminate zone data. Multiple peers can
-connect and down- and upload the data. A couple of nodes can be `seed` only meaning they will update
-the torrent when their zone data changes. Non-`seed` peers will write received data back into the
-zonefile - once the torrent is fully downloaded.
-
-## Syntax
-
-The simplest syntax is for a peer wanting to receive the zone data:
-
-~~~ txt
-torrent DBFILE
-~~~
-
-*  **DBFILE** the zone database file to torrent. If the path is relative, the path from the
-   *root* plugin will be prepended to it.
-
-For peers seeding the torrent use this, slightly expanded, syntax
-
-~~~ txt
-torrent DBFILE {
-    dht
-//    directory (temp storage)
-//    port for dth, etc.
-}
-~~~
-
-* `dth` starts a DTH server on address
-
-## Examples
-
-~~~ txt
-example.org {
-    file db.example.org
-    torrent db.example.org
-}
-~~~
-
-## Also See
-
-## Bugs
diff --git a/plugin/torrent/info.go b/plugin/torrent/info.go
deleted file mode 100644
index 8aa8f720a..000000000
--- a/plugin/torrent/info.go
+++ /dev/null
@@ -1,75 +0,0 @@
-package torrent
-
-import (
-	"crypto/sha1"
-	"io"
-	"os"
-	"strings"
-
-	"github.com/zeebo/bencode"
-)
-
-const pieceLength = 2048 * 10
-
-// pieces will hash the file in path on 256kb boundaries and return the (sha1) hashes.
-func pieces(path string) (int, string, error) {
-	f, err := os.Open(path)
-	if err != nil {
-		return 0, "", err
-	}
-	hashes := "" // concatenated string of hash (strings)
-	buf := make([]byte, 2048)
-	h := sha1.New()
-	chunk := 0
-	length := 0
-	n, err := f.Read(buf)
-	for err != nil {
-		h.Write(buf[:n])
-		chunk++
-		length += n
-		if chunk > 10 {
-			chunk = 0
-			hashes += string(h.Sum(nil))
-			h = sha1.New()
-		}
-		n, err = f.Read(buf)
-	}
-	if n > 0 {
-		length += n
-		h.Write(buf[:n])
-		hashes += string(h.Sum(nil))
-	}
-
-	return length, hashes, nil
-}
-
-// Info is the torrent meta data for a single file.
-type Info struct {
-	Pieces      string `bencode:"pieces"`
-	PieceLength int    `bencode:"piece length"`
-	Length      int    `bencode:"length"`
-	Name        string `bencode:"name"`
-}
-
-// TorrentInfo contains the meta data for this torrent.
-type TorrentInfo struct {
-	Nodes []string `bencode:"nodes"`
-	Info  Info     `bencode:"info"`
-}
-
-func NewTorrentInfo(path string) (*TorrentInfo, error) {
-	length, pieces, err := pieces(path)
-	if err != nil {
-		return nil, err
-	}
-	i := Info{Pieces: pieces, PieceLength: 2048 * 10, Length: length, Name: path}
-	return &TorrentInfo{Nodes: []string{}, Info: i}, nil
-}
-
-func (t *TorrentInfo) ToReader() io.Reader {
-	s, err := bencode.EncodeString(t)
-	if err != nil {
-		return nil
-	}
-	return strings.NewReader(s)
-}
diff --git a/plugin/torrent/session.go b/plugin/torrent/session.go
deleted file mode 100644
index 22c5d99d8..000000000
--- a/plugin/torrent/session.go
+++ /dev/null
@@ -1,49 +0,0 @@
-package torrent
-
-import (
-	"io/ioutil"
-	"log"
-	"path/filepath"
-	"time"
-
-	rtorrent "github.com/cenkalti/rain/torrent"
-)
-
-func (t *Torrent) Do() error {
-	dc := rtorrent.DefaultConfig
-	dc.DHTEnabled = t.dht
-	dc.RPCEnabled = false
-	dc.DHTBootstrapNodes = []string{"127.0.0.1:7246"} // its a me
-
-	td, err := ioutil.TempDir("", "example")
-	if err != nil {
-		return err
-	}
-	dc.DataDir = td
-	dc.Database = filepath.Join(td, "session.db")
-	s, err := rtorrent.NewSession(dc)
-	if err != nil {
-		return err
-	}
-
-	ti, err := NewTorrentInfo("plugin/torrent/testdata/db.miek.nl")
-	if err != nil {
-		return err
-	}
-
-	tor, err := s.AddTorrent(ti.ToReader(), nil)
-	if err != nil {
-		return err
-	}
-	//	mag, _ := tor.Magnet()
-
-	go s.StartAll()
-
-	// Watch the progress
-	for range time.Tick(time.Second) {
-		s := tor.Stats()
-		log.Printf("Status: %s, Downloaded: %d, Peers: %d", s.Status.String(), s.Bytes.Completed, s.Peers.Total)
-	}
-	return nil
-
-}
diff --git a/plugin/torrent/setup.go b/plugin/torrent/setup.go
deleted file mode 100644
index 5458e5a1c..000000000
--- a/plugin/torrent/setup.go
+++ /dev/null
@@ -1,58 +0,0 @@
-package torrent
-
-import (
-	"path/filepath"
-
-	"github.com/coredns/coredns/core/dnsserver"
-	"github.com/coredns/coredns/plugin"
-
-	"github.com/caddyserver/caddy"
-)
-
-func init() { plugin.Register("torrent", setup) }
-
-func setup(c *caddy.Controller) error {
-	tor, err := parse(c)
-	if err != nil {
-		return plugin.Error("torrent", err)
-	}
-
-	c.OnStartup(func() error {
-		err := tor.Do()
-		return err
-	})
-	c.OnShutdown(func() error {
-		close(tor.stop)
-		return nil
-	})
-
-	// Don't call AddPlugin, *sign* is not a plugin.
-	return nil
-}
-
-func parse(c *caddy.Controller) (*Torrent, error) {
-	t := &Torrent{stop: make(chan struct{})}
-	config := dnsserver.GetConfig(c)
-
-	for c.Next() {
-		if !c.NextArg() {
-			return nil, c.ArgErr()
-		}
-		dbfile := c.Val()
-		if !filepath.IsAbs(dbfile) && config.Root != "" {
-			dbfile = filepath.Join(config.Root, dbfile)
-		}
-		t.dbfile = dbfile
-
-		for c.NextBlock() {
-			switch c.Val() {
-			case "dht":
-				t.dht = true
-			default:
-				return nil, c.Errf("unknown property '%s'", c.Val())
-			}
-		}
-	}
-
-	return t, nil
-}
diff --git a/plugin/torrent/setup_test.go b/plugin/torrent/setup_test.go
deleted file mode 100644
index ae2f7baf5..000000000
--- a/plugin/torrent/setup_test.go
+++ /dev/null
@@ -1,53 +0,0 @@
-package torrent
-
-import (
-	"testing"
-
-	"github.com/caddyserver/caddy"
-)
-
-func TestParse(t *testing.T) {
-	tests := []struct {
-		input     string
-		shouldErr bool
-		exp       *Torrent
-	}{
-		{`torrent testdata/db.miek.nl {
-			dht
-		 }`,
-			false,
-			&Torrent{dbfile: "testdata/db.miek.nl", dht: true},
-		},
-		{`torrent testdata/db.miek.nl`,
-			false,
-			&Torrent{dbfile: "testdata/db.miek.nl"},
-		},
-		// errors
-		{`torrent db.example.org {
-			bla
-		 }`,
-			true,
-			nil,
-		},
-	}
-	for i, tc := range tests {
-		c := caddy.NewTestController("dns", tc.input)
-		tor, err := parse(c)
-
-		if err == nil && tc.shouldErr {
-			t.Fatalf("Test %d expected errors, but got no error", i)
-		}
-		if err != nil && !tc.shouldErr {
-			t.Fatalf("Test %d expected no errors, but got '%v'", i, err)
-		}
-		if tc.shouldErr {
-			continue
-		}
-		if x := tor.dbfile; x != tc.exp.dbfile {
-			t.Errorf("Test %d expected %s as dbfile, got %s", i, tc.exp.dbfile, x)
-		}
-		if x := tor.dth; x != tc.exp.dth {
-			t.Errorf("Test %d expected %T as seed, got %T", i, tc.exp.dth, x)
-		}
-	}
-}
diff --git a/plugin/torrent/testdata/db.miek.nl b/plugin/torrent/testdata/db.miek.nl
deleted file mode 100644
index 4041b1b5e..000000000
--- a/plugin/torrent/testdata/db.miek.nl
+++ /dev/null
@@ -1,17 +0,0 @@
-$TTL    30M
-$ORIGIN miek.nl.
-@       IN      SOA     linode.atoom.net. miek.miek.nl. ( 1282630060 4H 1H 7D 4H )
-                IN      NS      linode.atoom.net.
-                IN      MX      1  aspmx.l.google.com.
-		IN 	AAAA    2a01:7e00::f03c:91ff:fe79:234c
-		IN	DNSKEY  257 3 13 sfzRg5nDVxbeUc51su4MzjgwpOpUwnuu81SlRHqJuXe3SOYOeypR69tZ52XLmE56TAmPHsiB8Rgk+NTpf0o1Cw==
-
-a		IN 	AAAA    2a01:7e00::f03c:91ff:fe79:234c
-www     	IN 	CNAME 	a
-
-
-bla                 IN  NS      ns1.bla.com.
-ns3.blaaat.miek.nl. IN  AAAA    ::1 ; non-glue, should be signed.
-; in baliwick nameserver that requires glue, should not be signed
-bla                 IN  NS      ns2.bla.miek.nl.
-ns2.bla.miek.nl.    IN  A       127.0.0.1
diff --git a/plugin/torrent/torrent.go b/plugin/torrent/torrent.go
deleted file mode 100644
index 4c008b834..000000000
--- a/plugin/torrent/torrent.go
+++ /dev/null
@@ -1,9 +0,0 @@
-package torrent
-
-// Torrent contains the file data that needs to be torrented.
-type Torrent struct {
-	dbfile string
-	dht    bool
-
-	stop chan struct{}
-}