mirror of
https://github.com/cwinfo/yggdrasil-go.git
synced 2024-11-22 09:30:28 +00:00
add tcp support and use it by default
This commit is contained in:
Arceliar
parent
4acce71468
commit
d424489329
@ -43,6 +43,9 @@ In practice, you probably want to run this instead:
|
||||
|
||||
This keeps a persistent set of keys (and by extension, IP address) and gives you the option of editing the configuration file.
|
||||
If you want to use it as an overlay network on top of e.g. the internet, then you can do so by adding the remote devices domain/address and port (as a string, e.g. `"1.2.3.4:5678"`) to the list of `Peers` in the configuration file.
|
||||
You can control whether or not it peers over TCP or UDP by adding `tcp:` or `udp:` to the start of the string, i.e. `"udp:1.2.3.4:5678"`.
|
||||
It is currently configured to accept incoming TCP and UDP connections.
|
||||
In the interest of testing the TCP machinery, it's set to create TCP connections for auto-peering (over link-local IPv6), and to use TCP by default if no transport is specified for a manually configured peer.
|
||||
|
||||
### Platforms
|
||||
|
||||
|
||||
@ -1,283 +0,0 @@
|
||||
package main
|
||||
|
||||
import "bytes"
|
||||
import "encoding/hex"
|
||||
import "encoding/json"
|
||||
import "flag"
|
||||
import "fmt"
|
||||
import "io/ioutil"
|
||||
import "net"
|
||||
import "os"
|
||||
import "os/signal"
|
||||
import "time"
|
||||
import "regexp"
|
||||
|
||||
import _ "net/http/pprof"
|
||||
import "net/http"
|
||||
import "log"
|
||||
import "runtime"
|
||||
|
||||
import "golang.org/x/net/ipv6"
|
||||
|
||||
import . "yggdrasil"
|
||||
|
||||
/**
|
||||
* This is a very crude wrapper around src/yggdrasil
|
||||
* It can generate a new config (--genconf)
|
||||
* It can read a config from stdin (--useconf)
|
||||
* It can run with an automatic config (--autoconf)
|
||||
*/
|
||||
|
||||
type nodeConfig struct {
|
||||
Listen string
|
||||
AdminListen string
|
||||
Peers []string
|
||||
BoxPub string
|
||||
BoxPriv string
|
||||
SigPub string
|
||||
SigPriv string
|
||||
Multicast bool
|
||||
LinkLocal string
|
||||
IfName string
|
||||
}
|
||||
|
||||
type node struct {
|
||||
core Core
|
||||
sock *ipv6.PacketConn
|
||||
}
|
||||
|
||||
func (n *node) init(cfg *nodeConfig, logger *log.Logger) {
|
||||
boxPub, err := hex.DecodeString(cfg.BoxPub)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
boxPriv, err := hex.DecodeString(cfg.BoxPriv)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
sigPub, err := hex.DecodeString(cfg.SigPub)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
sigPriv, err := hex.DecodeString(cfg.SigPriv)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
n.core.DEBUG_init(boxPub, boxPriv, sigPub, sigPriv)
|
||||
n.core.DEBUG_setLogger(logger)
|
||||
ifceExpr, err := regexp.Compile(cfg.LinkLocal)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
n.core.DEBUG_setIfceExpr(ifceExpr)
|
||||
logger.Println("Starting interface...")
|
||||
n.core.DEBUG_setupAndStartGlobalTCPInterface(cfg.Listen)
|
||||
logger.Println("Started interface")
|
||||
logger.Println("Starting admin socket...")
|
||||
n.core.DEBUG_setupAndStartAdminInterface(cfg.AdminListen)
|
||||
logger.Println("Started admin socket")
|
||||
go func() {
|
||||
if len(cfg.Peers) == 0 {
|
||||
return
|
||||
}
|
||||
for {
|
||||
for _, p := range cfg.Peers {
|
||||
n.core.DEBUG_addTCPConn(p)
|
||||
time.Sleep(time.Second)
|
||||
}
|
||||
time.Sleep(time.Minute)
|
||||
}
|
||||
}()
|
||||
}
|
||||
|
||||
func generateConfig() *nodeConfig {
|
||||
core := Core{}
|
||||
bpub, bpriv := core.DEBUG_newBoxKeys()
|
||||
spub, spriv := core.DEBUG_newSigKeys()
|
||||
cfg := nodeConfig{}
|
||||
cfg.Listen = "[::]:0"
|
||||
cfg.AdminListen = "localhost:9001"
|
||||
cfg.BoxPub = hex.EncodeToString(bpub[:])
|
||||
cfg.BoxPriv = hex.EncodeToString(bpriv[:])
|
||||
cfg.SigPub = hex.EncodeToString(spub[:])
|
||||
cfg.SigPriv = hex.EncodeToString(spriv[:])
|
||||
cfg.Peers = []string{}
|
||||
cfg.Multicast = true
|
||||
cfg.LinkLocal = ""
|
||||
cfg.IfName = "auto"
|
||||
return &cfg
|
||||
}
|
||||
|
||||
func doGenconf() string {
|
||||
cfg := generateConfig()
|
||||
bs, err := json.MarshalIndent(cfg, "", " ")
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
return string(bs)
|
||||
}
|
||||
|
||||
var multicastAddr = "[ff02::114]:9001"
|
||||
|
||||
func (n *node) listen() {
|
||||
groupAddr, err := net.ResolveUDPAddr("udp6", multicastAddr)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
bs := make([]byte, 2048)
|
||||
for {
|
||||
nBytes, rcm, fromAddr, err := n.sock.ReadFrom(bs)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
//if rcm == nil { continue } // wat
|
||||
//fmt.Println("DEBUG:", "packet from:", fromAddr.String())
|
||||
if rcm != nil {
|
||||
// Windows can't set the flag needed to return a non-nil value here
|
||||
// So only make these checks if we get something useful back
|
||||
// TODO? Skip them always, I'm not sure if they're really needed...
|
||||
if !rcm.Dst.IsLinkLocalMulticast() {
|
||||
continue
|
||||
}
|
||||
if !rcm.Dst.Equal(groupAddr.IP) {
|
||||
continue
|
||||
}
|
||||
}
|
||||
anAddr := string(bs[:nBytes])
|
||||
addr, err := net.ResolveTCPAddr("tcp6", anAddr)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
continue
|
||||
} // Panic for testing, remove later
|
||||
from := fromAddr.(*net.UDPAddr)
|
||||
//fmt.Println("DEBUG:", "heard:", addr.IP.String(), "from:", from.IP.String())
|
||||
if addr.IP.String() != from.IP.String() {
|
||||
continue
|
||||
}
|
||||
addr.Zone = from.Zone
|
||||
saddr := addr.String()
|
||||
//if _, isIn := n.peers[saddr]; isIn { continue }
|
||||
//n.peers[saddr] = struct{}{}
|
||||
n.core.DEBUG_addTCPConn(saddr)
|
||||
//fmt.Println("DEBUG:", "added multicast peer:", saddr)
|
||||
}
|
||||
}
|
||||
|
||||
func (n *node) announce() {
|
||||
groupAddr, err := net.ResolveUDPAddr("udp6", multicastAddr)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
var anAddr net.TCPAddr
|
||||
tcpAddr := n.core.DEBUG_getGlobalTCPAddr()
|
||||
anAddr.Port = tcpAddr.Port
|
||||
destAddr, err := net.ResolveUDPAddr("udp6", multicastAddr)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
for {
|
||||
ifaces, err := net.Interfaces()
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
for _, iface := range ifaces {
|
||||
n.sock.JoinGroup(&iface, groupAddr)
|
||||
//err := n.sock.JoinGroup(&iface, groupAddr)
|
||||
//if err != nil { panic(err) }
|
||||
addrs, err := iface.Addrs()
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
for _, addr := range addrs {
|
||||
addrIP, _, _ := net.ParseCIDR(addr.String())
|
||||
if addrIP.To4() != nil {
|
||||
continue
|
||||
} // IPv6 only
|
||||
if !addrIP.IsLinkLocalUnicast() {
|
||||
continue
|
||||
}
|
||||
anAddr.IP = addrIP
|
||||
anAddr.Zone = iface.Name
|
||||
destAddr.Zone = iface.Name
|
||||
msg := []byte(anAddr.String())
|
||||
n.sock.WriteTo(msg, nil, destAddr)
|
||||
break
|
||||
}
|
||||
time.Sleep(time.Second)
|
||||
}
|
||||
time.Sleep(time.Second)
|
||||
}
|
||||
}
|
||||
|
||||
var pprof = flag.Bool("pprof", false, "Run pprof, see http://localhost:6060/debug/pprof/")
|
||||
var genconf = flag.Bool("genconf", false, "print a new config to stdout")
|
||||
var useconf = flag.Bool("useconf", false, "read config from stdin")
|
||||
var autoconf = flag.Bool("autoconf", false, "automatic mode (dynamic IP, peer with IPv6 neighbors)")
|
||||
|
||||
func main() {
|
||||
flag.Parse()
|
||||
var cfg *nodeConfig
|
||||
switch {
|
||||
case *autoconf:
|
||||
cfg = generateConfig()
|
||||
case *useconf:
|
||||
config, err := ioutil.ReadAll(os.Stdin)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
decoder := json.NewDecoder(bytes.NewReader(config))
|
||||
cfg = generateConfig()
|
||||
err = decoder.Decode(cfg)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
case *genconf:
|
||||
fmt.Println(doGenconf())
|
||||
default:
|
||||
flag.PrintDefaults()
|
||||
}
|
||||
if cfg == nil {
|
||||
return
|
||||
}
|
||||
logger := log.New(os.Stdout, "", log.Flags())
|
||||
if *pprof {
|
||||
runtime.SetBlockProfileRate(1)
|
||||
go func() { log.Println(http.ListenAndServe("localhost:6060", nil)) }()
|
||||
}
|
||||
// Setup
|
||||
logger.Println("Initializing...")
|
||||
n := node{}
|
||||
n.init(cfg, logger)
|
||||
logger.Println("Starting tun...")
|
||||
//n.core.DEBUG_startTun(cfg.IfName) // 1280, the smallest supported MTU
|
||||
n.core.DEBUG_startTunWithMTU(cfg.IfName, 65535) // Largest supported MTU
|
||||
defer func() {
|
||||
logger.Println("Closing...")
|
||||
n.core.DEBUG_stopTun()
|
||||
}()
|
||||
logger.Println("Started...")
|
||||
if cfg.Multicast {
|
||||
addr, err := net.ResolveUDPAddr("udp", multicastAddr)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
listenString := fmt.Sprintf("[::]:%v", addr.Port)
|
||||
conn, err := net.ListenPacket("udp6", listenString)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
//defer conn.Close() // Let it close on its own when the application exits
|
||||
n.sock = ipv6.NewPacketConn(conn)
|
||||
if err = n.sock.SetControlMessage(ipv6.FlagDst, true); err != nil {
|
||||
// Windows can't set this flag, so we need to handle it in other ways
|
||||
//panic(err)
|
||||
}
|
||||
go n.listen()
|
||||
go n.announce()
|
||||
}
|
||||
// Catch interrupt to exit gracefully
|
||||
c := make(chan os.Signal, 1)
|
||||
signal.Notify(c, os.Interrupt, os.Kill)
|
||||
<-c
|
||||
logger.Println("Stopping...")
|
||||
}
|
||||
@ -319,7 +319,7 @@ func (iface *udpInterface) reader() {
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
const udp_chunkSize = 1024
|
||||
const udp_chunkSize = 508 // Apparently the maximum guaranteed safe IPv4 size
|
||||
|
||||
func udp_decode(bs []byte) (chunks, chunk, count uint8, payload []byte) {
|
||||
if len(bs) >= 3 {
|
||||
|
||||
19
yggdrasil.go
19
yggdrasil.go
@ -71,7 +71,8 @@ func (n *node) init(cfg *nodeConfig, logger *log.Logger) {
|
||||
}
|
||||
n.core.DEBUG_setIfceExpr(ifceExpr)
|
||||
logger.Println("Starting interface...")
|
||||
n.core.DEBUG_setupAndStartGlobalUDPInterface(cfg.Listen)
|
||||
n.core.DEBUG_setupAndStartGlobalTCPInterface(cfg.Listen) // Listen for peers on TCP
|
||||
n.core.DEBUG_setupAndStartGlobalUDPInterface(cfg.Listen) // Also listen on UDP, TODO allow separate configuration for ip/port to listen on each of these
|
||||
logger.Println("Started interface")
|
||||
logger.Println("Starting admin socket...")
|
||||
n.core.DEBUG_setupAndStartAdminInterface(cfg.AdminListen)
|
||||
@ -82,7 +83,11 @@ func (n *node) init(cfg *nodeConfig, logger *log.Logger) {
|
||||
}
|
||||
for {
|
||||
for _, p := range cfg.Peers {
|
||||
n.core.DEBUG_maybeSendUDPKeys(p)
|
||||
switch {
|
||||
case len(p) >= 4 && p[:4] == "udp:": n.core.DEBUG_maybeSendUDPKeys(p[4:])
|
||||
case len(p) >= 4 && p[:4] == "tcp:": n.core.DEBUG_addTCPConn(p[4:])
|
||||
default: n.core.DEBUG_addTCPConn(p)
|
||||
}
|
||||
time.Sleep(time.Second)
|
||||
}
|
||||
time.Sleep(time.Minute)
|
||||
@ -144,7 +149,7 @@ func (n *node) listen() {
|
||||
}
|
||||
}
|
||||
anAddr := string(bs[:nBytes])
|
||||
addr, err := net.ResolveUDPAddr("udp6", anAddr)
|
||||
addr, err := net.ResolveTCPAddr("tcp6", anAddr)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
continue
|
||||
@ -158,7 +163,7 @@ func (n *node) listen() {
|
||||
saddr := addr.String()
|
||||
//if _, isIn := n.peers[saddr]; isIn { continue }
|
||||
//n.peers[saddr] = struct{}{}
|
||||
n.core.DEBUG_maybeSendUDPKeys(saddr)
|
||||
n.core.DEBUG_addTCPConn(saddr) // FIXME? can result in 2 connections per peer
|
||||
//fmt.Println("DEBUG:", "added multicast peer:", saddr)
|
||||
}
|
||||
}
|
||||
@ -168,9 +173,9 @@ func (n *node) announce() {
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
var anAddr net.UDPAddr
|
||||
udpAddr := n.core.DEBUG_getGlobalUDPAddr()
|
||||
anAddr.Port = udpAddr.Port
|
||||
var anAddr net.TCPAddr
|
||||
tcpAddr := n.core.DEBUG_getGlobalTCPAddr()
|
||||
anAddr.Port = tcpAddr.Port
|
||||
destAddr, err := net.ResolveUDPAddr("udp6", multicastAddr)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user