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Try to convert TUN/TAP to use new yggdrasil.Conn, search masks are still broken

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This commit is contained in:
Neil Alexander 2019-04-20 16:32:27 +01:00
parent 319366513c
commit d01662c1fb
No known key found for this signature in database
GPG Key ID: A02A2019A2BB0944
14 changed files with 502 additions and 366 deletions
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237
cmd/yggdrasil/main.go
View File

@ -10,7 +10,6 @@ import (
"os/signal"
"strings"
"syscall"
"time"
"golang.org/x/text/encoding/unicode"
@ -77,57 +76,44 @@ func readConfig(useconf *bool, useconffile *string, normaliseconf *bool) *nodeCo
panic(err)
}
json.Unmarshal(confJson, &cfg)
// For now we will do a little bit to help the user adjust their
// configuration to match the new configuration format, as some of the key
// names have changed recently.
changes := map[string]string{
"Multicast": "",
"ReadTimeout": "",
"LinkLocal": "MulticastInterfaces",
"BoxPub": "EncryptionPublicKey",
"BoxPriv": "EncryptionPrivateKey",
"SigPub": "SigningPublicKey",
"SigPriv": "SigningPrivateKey",
"AllowedBoxPubs": "AllowedEncryptionPublicKeys",
}
// Loop over the mappings aove and see if we have anything to fix.
for from, to := range changes {
if _, ok := dat[from]; ok {
if to == "" {
if !*normaliseconf {
log.Println("Warning: Config option", from, "is deprecated")
}
} else {
if !*normaliseconf {
log.Println("Warning: Config option", from, "has been renamed - please change to", to)
}
// If the configuration file doesn't already contain a line with the
// new name then set it to the old value. This makes sure that we
// don't overwrite something that was put there intentionally.
if _, ok := dat[to]; !ok {
dat[to] = dat[from]
/*
// For now we will do a little bit to help the user adjust their
// configuration to match the new configuration format, as some of the key
// names have changed recently.
changes := map[string]string{
"Multicast": "",
"ReadTimeout": "",
"LinkLocal": "MulticastInterfaces",
"BoxPub": "EncryptionPublicKey",
"BoxPriv": "EncryptionPrivateKey",
"SigPub": "SigningPublicKey",
"SigPriv": "SigningPrivateKey",
"AllowedBoxPubs": "AllowedEncryptionPublicKeys",
}
// Loop over the mappings aove and see if we have anything to fix.
for from, to := range changes {
if _, ok := dat[from]; ok {
if to == "" {
if !*normaliseconf {
log.Println("Warning: Config option", from, "is deprecated")
}
} else {
if !*normaliseconf {
log.Println("Warning: Config option", from, "has been renamed - please change to", to)
}
// If the configuration file doesn't already contain a line with the
// new name then set it to the old value. This makes sure that we
// don't overwrite something that was put there intentionally.
if _, ok := dat[to]; !ok {
dat[to] = dat[from]
}
}
}
}
}
// Check to see if the peers are in a parsable format, if not then default
// them to the TCP scheme
if peers, ok := dat["Peers"].([]interface{}); ok {
for index, peer := range peers {
uri := peer.(string)
if strings.HasPrefix(uri, "tcp://") || strings.HasPrefix(uri, "socks://") {
continue
}
if strings.HasPrefix(uri, "tcp:") {
uri = uri[4:]
}
(dat["Peers"].([]interface{}))[index] = "tcp://" + uri
}
}
// Now do the same with the interface peers
if interfacepeers, ok := dat["InterfacePeers"].(map[string]interface{}); ok {
for intf, peers := range interfacepeers {
for index, peer := range peers.([]interface{}) {
// Check to see if the peers are in a parsable format, if not then default
// them to the TCP scheme
if peers, ok := dat["Peers"].([]interface{}); ok {
for index, peer := range peers {
uri := peer.(string)
if strings.HasPrefix(uri, "tcp://") || strings.HasPrefix(uri, "socks://") {
continue
@ -135,19 +121,34 @@ func readConfig(useconf *bool, useconffile *string, normaliseconf *bool) *nodeCo
if strings.HasPrefix(uri, "tcp:") {
uri = uri[4:]
}
((dat["InterfacePeers"].(map[string]interface{}))[intf]).([]interface{})[index] = "tcp://" + uri
(dat["Peers"].([]interface{}))[index] = "tcp://" + uri
}
}
}
// Do a quick check for old-format Listen statement so that mapstructure
// doesn't fail and crash
if listen, ok := dat["Listen"].(string); ok {
if strings.HasPrefix(listen, "tcp://") {
dat["Listen"] = []string{listen}
} else {
dat["Listen"] = []string{"tcp://" + listen}
// Now do the same with the interface peers
if interfacepeers, ok := dat["InterfacePeers"].(map[string]interface{}); ok {
for intf, peers := range interfacepeers {
for index, peer := range peers.([]interface{}) {
uri := peer.(string)
if strings.HasPrefix(uri, "tcp://") || strings.HasPrefix(uri, "socks://") {
continue
}
if strings.HasPrefix(uri, "tcp:") {
uri = uri[4:]
}
((dat["InterfacePeers"].(map[string]interface{}))[intf]).([]interface{})[index] = "tcp://" + uri
}
}
}
}
// Do a quick check for old-format Listen statement so that mapstructure
// doesn't fail and crash
if listen, ok := dat["Listen"].(string); ok {
if strings.HasPrefix(listen, "tcp://") {
dat["Listen"] = []string{listen}
} else {
dat["Listen"] = []string{"tcp://" + listen}
}
}
*/
// Overlay our newly mapped configuration onto the autoconf node config that
// we generated above.
if err = mapstructure.Decode(dat, &cfg); err != nil {
@ -249,8 +250,6 @@ func main() {
// Setup the Yggdrasil node itself. The node{} type includes a Core, so we
// don't need to create this manually.
n := node{}
// Before we start the node, set the TUN/TAP to be our router adapter
n.core.SetRouterAdapter(&n.tuntap)
// Now start Yggdrasil - this starts the DHT, router, switch and other core
// components needed for Yggdrasil to operate
state, err := n.core.Start(cfg, logger)
@ -263,72 +262,88 @@ func main() {
if err := n.multicast.Start(); err != nil {
logger.Errorln("An error occurred starting multicast:", err)
}
// Start the TUN/TAP interface
if listener, err := n.core.ConnListen(); err == nil {
if dialer, err := n.core.ConnDialer(); err == nil {
logger.Println("Got listener", listener, "and dialer", dialer)
n.tuntap.Init(state, logger, listener, dialer)
if err := n.tuntap.Start(); err != nil {
logger.Errorln("An error occurred starting TUN/TAP:", err)
}
} else {
logger.Errorln("Unable to get Dialer:", err)
}
} else {
logger.Errorln("Unable to get Listener:", err)
}
// The Stop function ensures that the TUN/TAP adapter is correctly shut down
// before the program exits.
defer func() {
n.core.Stop()
}()
// Listen for new sessions
go func() {
listener, err := n.core.ListenConn()
if err != nil {
logger.Errorln("Unable to listen for sessions:", err)
return
}
for {
conn, err := listener.Accept()
if err != nil {
logger.Errorln("Accept:", err)
continue
}
logger.Println("Accepted")
for {
b := make([]byte, 100)
if n, err := conn.Read(b); err != nil {
logger.Errorln("Read failed:", err)
time.Sleep(time.Second * 2)
} else {
logger.Println("Read", n, "bytes:", b)
b = []byte{5, 5, 5}
if n, err := conn.Write(b); err != nil {
logger.Errorln("Write failed:", err)
time.Sleep(time.Second * 2)
} else {
logger.Println("Wrote", n, "bytes:", b)
}
}
}
}
}()
// Try creating new sessions
go func() {
if cfg.EncryptionPublicKey != "533574224115f835b7c7db6433986bc5aef855ff9c9568c01abeb0fbed3e8810" {
return
}
time.Sleep(time.Second * 2)
conn, err := n.core.Dial("nodeid", "9890e135604e8aa6039a909e40c629824d852042a70e51957d5b9d700195663d50552e8e869af132b4617d76f8ef00314d94cce23aa8d6b051b3b952a32a4966")
if err != nil {
logger.Errorln("Dial:", err)
return
}
/*
go func() {
listener, err := n.core.ListenConn()
if err != nil {
logger.Errorln("Unable to listen for sessions:", err)
return
}
for {
time.Sleep(time.Second * 2)
b := []byte{1, 2, 3, 4, 5}
if n, err := conn.Write(b); err != nil {
logger.Errorln("Write failed:", err)
} else {
logger.Println("Wrote", n, "bytes:", b)
b = make([]byte, 100)
conn, err := listener.Accept()
if err != nil {
logger.Errorln("Accept:", err)
continue
}
logger.Println("Accepted")
for {
b := make([]byte, 100)
if n, err := conn.Read(b); err != nil {
logger.Errorln("Read failed:", err)
time.Sleep(time.Second * 2)
} else {
logger.Println("Read", n, "bytes:", b)
b = []byte{5, 5, 5}
if n, err := conn.Write(b); err != nil {
logger.Errorln("Write failed:", err)
time.Sleep(time.Second * 2)
} else {
logger.Println("Wrote", n, "bytes:", b)
}
}
}
}
}()
}()
// Try creating new sessions
go func() {
if cfg.EncryptionPublicKey != "533574224115f835b7c7db6433986bc5aef855ff9c9568c01abeb0fbed3e8810" {
return
}
time.Sleep(time.Second * 2)
conn, err := n.core.Dial("nodeid", "9890e135604e8aa6039a909e40c629824d852042a70e51957d5b9d700195663d50552e8e869af132b4617d76f8ef00314d94cce23aa8d6b051b3b952a32a4966")
if err != nil {
logger.Errorln("Dial:", err)
return
}
go func() {
for {
time.Sleep(time.Second * 2)
b := []byte{1, 2, 3, 4, 5}
if n, err := conn.Write(b); err != nil {
logger.Errorln("Write failed:", err)
} else {
logger.Println("Wrote", n, "bytes:", b)
b = make([]byte, 100)
if n, err := conn.Read(b); err != nil {
logger.Errorln("Read failed:", err)
} else {
logger.Println("Read", n, "bytes:", b)
}
}
}
}()
}()
*/
// Make some nice output that tells us what our IPv6 address and subnet are.
// This is just logged to stdout for the user.
address := n.core.Address()

27
src/crypto/crypto.go
View File

@ -37,10 +37,37 @@ func (n *NodeID) String() string {
return hex.EncodeToString(n[:])
}
// Network returns "nodeid" nearly always right now.
func (n *NodeID) Network() string {
return "nodeid"
}
// PrefixLength returns the number of bits set in a masked NodeID.
func (n *NodeID) PrefixLength() int {
var len int
for i, v := range *n {
_, _ = i, v
if v == 0xff {
len += 8
continue
}
for v&0x80 != 0 {
len++
v <<= 1
}
if v != 0 {
return -1
}
for i++; i < NodeIDLen; i++ {
if n[i] != 0 {
return -1
}
}
break
}
return len
}
func GetNodeID(pub *BoxPubKey) *NodeID {
h := sha512.Sum512(pub[:])
return (*NodeID)(&h)

304
src/tuntap/tun.go
View File

@ -3,7 +3,7 @@ package tuntap
// This manages the tun driver to send/recv packets to/from applications
import (
"bytes"
"encoding/hex"
"errors"
"fmt"
"net"
@ -11,16 +11,12 @@ import (
"time"
"github.com/gologme/log"
"golang.org/x/net/icmp"
"golang.org/x/net/ipv6"
"github.com/songgao/packets/ethernet"
"github.com/yggdrasil-network/water"
"github.com/yggdrasil-network/yggdrasil-go/src/address"
"github.com/yggdrasil-network/yggdrasil-go/src/config"
"github.com/yggdrasil-network/yggdrasil-go/src/crypto"
"github.com/yggdrasil-network/yggdrasil-go/src/defaults"
"github.com/yggdrasil-network/yggdrasil-go/src/util"
"github.com/yggdrasil-network/yggdrasil-go/src/yggdrasil"
)
@ -32,14 +28,20 @@ const tun_ETHER_HEADER_LENGTH = 14
// you should pass this object to the yggdrasil.SetRouterAdapter() function
// before calling yggdrasil.Start().
type TunAdapter struct {
yggdrasil.Adapter
addr address.Address
subnet address.Subnet
icmpv6 ICMPv6
mtu int
iface *water.Interface
mutex sync.RWMutex // Protects the below
isOpen bool
config *config.NodeState
log *log.Logger
reconfigure chan chan error
conns map[crypto.NodeID]yggdrasil.Conn
connsMutex sync.RWMutex
listener *yggdrasil.Listener
dialer *yggdrasil.Dialer
addr address.Address
subnet address.Subnet
icmpv6 ICMPv6
mtu int
iface *water.Interface
mutex sync.RWMutex // Protects the below
isOpen bool
}
// Gets the maximum supported MTU for the platform based on the defaults in
@ -94,62 +96,48 @@ func MaximumMTU() int {
return defaults.GetDefaults().MaximumIfMTU
}
// Init initialises the TUN/TAP adapter.
func (tun *TunAdapter) Init(config *config.NodeState, log *log.Logger, send chan<- []byte, recv <-chan []byte, reject <-chan yggdrasil.RejectedPacket) {
tun.Adapter.Init(config, log, send, recv, reject)
tun.icmpv6.Init(tun)
go func() {
for {
e := <-tun.Reconfigure
tun.Config.Mutex.RLock()
updated := tun.Config.Current.IfName != tun.Config.Previous.IfName ||
tun.Config.Current.IfTAPMode != tun.Config.Previous.IfTAPMode ||
tun.Config.Current.IfMTU != tun.Config.Previous.IfMTU
tun.Config.Mutex.RUnlock()
if updated {
tun.Log.Warnln("Reconfiguring TUN/TAP is not supported yet")
e <- nil
} else {
e <- nil
}
}
}()
// Init initialises the TUN/TAP module. You must have acquired a Listener from
// the Yggdrasil core before this point and it must not be in use elsewhere.
func (tun *TunAdapter) Init(config *config.NodeState, log *log.Logger, listener *yggdrasil.Listener, dialer *yggdrasil.Dialer) {
tun.config = config
tun.log = log
tun.listener = listener
tun.dialer = dialer
tun.conns = make(map[crypto.NodeID]yggdrasil.Conn)
}
// Start the setup process for the TUN/TAP adapter. If successful, starts the
// read/write goroutines to handle packets on that interface.
func (tun *TunAdapter) Start(a address.Address, s address.Subnet) error {
tun.addr = a
tun.subnet = s
if tun.Config == nil {
func (tun *TunAdapter) Start() error {
tun.config.Mutex.Lock()
defer tun.config.Mutex.Unlock()
if tun.config == nil || tun.listener == nil || tun.dialer == nil {
return errors.New("No configuration available to TUN/TAP")
}
tun.Config.Mutex.RLock()
ifname := tun.Config.Current.IfName
iftapmode := tun.Config.Current.IfTAPMode
addr := fmt.Sprintf("%s/%d", net.IP(tun.addr[:]).String(), 8*len(address.GetPrefix())-1)
mtu := tun.Config.Current.IfMTU
tun.Config.Mutex.RUnlock()
var boxPub crypto.BoxPubKey
boxPubHex, err := hex.DecodeString(tun.config.Current.EncryptionPublicKey)
if err != nil {
return err
}
copy(boxPub[:], boxPubHex)
nodeID := crypto.GetNodeID(&boxPub)
tun.addr = *address.AddrForNodeID(nodeID)
tun.subnet = *address.SubnetForNodeID(nodeID)
tun.mtu = tun.config.Current.IfMTU
ifname := tun.config.Current.IfName
iftapmode := tun.config.Current.IfTAPMode
if ifname != "none" {
if err := tun.setup(ifname, iftapmode, addr, mtu); err != nil {
if err := tun.setup(ifname, iftapmode, net.IP(tun.addr[:]).String(), tun.mtu); err != nil {
return err
}
}
if ifname == "none" || ifname == "dummy" {
tun.Log.Debugln("Not starting TUN/TAP as ifname is none or dummy")
tun.log.Debugln("Not starting TUN/TAP as ifname is none or dummy")
return nil
}
tun.mutex.Lock()
tun.isOpen = true
tun.mutex.Unlock()
go func() {
tun.Log.Debugln("Starting TUN/TAP reader goroutine")
tun.Log.Errorln("WARNING: tun.read() exited with error:", tun.read())
}()
go func() {
tun.Log.Debugln("Starting TUN/TAP writer goroutine")
tun.Log.Errorln("WARNING: tun.write() exited with error:", tun.write())
}()
if iftapmode {
go func() {
for {
@ -167,74 +155,215 @@ func (tun *TunAdapter) Start(a address.Address, s address.Subnet) error {
}
}()
}
tun.icmpv6.Init(tun)
go func() {
for {
e := <-tun.reconfigure
e <- nil
}
}()
go tun.handler()
go tun.ifaceReader()
return nil
}
func (tun *TunAdapter) handler() error {
for {
// Accept the incoming connection
conn, err := tun.listener.Accept()
if err != nil {
tun.log.Errorln("TUN/TAP error accepting connection:", err)
return err
}
tun.log.Println("Accepted connection from", conn.RemoteAddr())
go tun.connReader(conn)
}
}
func (tun *TunAdapter) connReader(conn *yggdrasil.Conn) error {
b := make([]byte, 65535)
for {
n, err := conn.Read(b)
if err != nil {
tun.log.Errorln("TUN/TAP read error:", err)
return err
}
if n == 0 {
continue
}
w, err := tun.iface.Write(b[:n])
if err != nil {
tun.log.Errorln("TUN/TAP failed to write to interface:", err)
continue
}
if w != n {
tun.log.Errorln("TUN/TAP wrote", w, "instead of", n, "which is bad")
continue
}
}
}
func (tun *TunAdapter) ifaceReader() error {
tun.log.Println("Start TUN reader")
bs := make([]byte, 65535)
for {
n, err := tun.iface.Read(bs)
if err != nil {
tun.log.Errorln("TUN/TAP iface read error:", err)
}
// Look up if the dstination address is somewhere we already have an
// open connection to
var srcAddr address.Address
var dstAddr address.Address
var dstNodeID *crypto.NodeID
var dstNodeIDMask *crypto.NodeID
var dstSnet address.Subnet
var addrlen int
if bs[0]&0xf0 == 0x60 {
// Check if we have a fully-sized header
if len(bs) < 40 {
panic("Tried to send a packet shorter than an IPv6 header...")
}
// IPv6 address
addrlen = 16
copy(srcAddr[:addrlen], bs[8:])
copy(dstAddr[:addrlen], bs[24:])
copy(dstSnet[:addrlen/2], bs[24:])
} else if bs[0]&0xf0 == 0x40 {
// Check if we have a fully-sized header
if len(bs) < 20 {
panic("Tried to send a packet shorter than an IPv4 header...")
}
// IPv4 address
addrlen = 4
copy(srcAddr[:addrlen], bs[12:])
copy(dstAddr[:addrlen], bs[16:])
} else {
// Unknown address length
continue
}
dstNodeID, dstNodeIDMask = dstAddr.GetNodeIDandMask()
// Do we have an active connection for this node ID?
if conn, isIn := tun.conns[*dstNodeID]; isIn {
fmt.Println("We have a connection for", *dstNodeID)
w, err := conn.Write(bs)
if err != nil {
fmt.Println("Unable to write to remote:", err)
continue
}
if w != n {
continue
}
} else {
fmt.Println("Opening connection for", *dstNodeID)
tun.connsMutex.Lock()
maskstr := hex.EncodeToString(dstNodeID[:])
masklen := dstNodeIDMask.PrefixLength()
cidr := fmt.Sprintf("%s/%d", maskstr, masklen)
if conn, err := tun.dialer.Dial("nodeid", cidr); err == nil {
tun.conns[*dstNodeID] = conn
go tun.connReader(&conn)
} else {
fmt.Println("Error dialing:", err)
}
tun.connsMutex.Unlock()
}
/*if !r.cryptokey.isValidSource(srcAddr, addrlen) {
// The packet had a src address that doesn't belong to us or our
// configured crypto-key routing src subnets
return
}
if !dstAddr.IsValid() && !dstSnet.IsValid() {
// The addresses didn't match valid Yggdrasil node addresses so let's see
// whether it matches a crypto-key routing range instead
if key, err := r.cryptokey.getPublicKeyForAddress(dstAddr, addrlen); err == nil {
// A public key was found, get the node ID for the search
dstPubKey = &key
dstNodeID = crypto.GetNodeID(dstPubKey)
// Do a quick check to ensure that the node ID refers to a vaild Yggdrasil
// address or subnet - this might be superfluous
addr := *address.AddrForNodeID(dstNodeID)
copy(dstAddr[:], addr[:])
copy(dstSnet[:], addr[:])
if !dstAddr.IsValid() && !dstSnet.IsValid() {
return
}
} else {
// No public key was found in the CKR table so we've exhausted our options
return
}
}*/
}
}
// Writes a packet to the TUN/TAP adapter. If the adapter is running in TAP
// mode then additional ethernet encapsulation is added for the benefit of the
// host operating system.
/*
func (tun *TunAdapter) write() error {
for {
select {
case reject := <-tun.Reject:
switch reject.Reason {
case yggdrasil.PacketTooBig:
if mtu, ok := reject.Detail.(int); ok {
// Create the Packet Too Big response
ptb := &icmp.PacketTooBig{
MTU: int(mtu),
Data: reject.Packet,
}
// Create the ICMPv6 response from it
icmpv6Buf, err := CreateICMPv6(
reject.Packet[8:24], reject.Packet[24:40],
ipv6.ICMPTypePacketTooBig, 0, ptb)
// Send the ICMPv6 response back to the TUN/TAP adapter
if err == nil {
tun.iface.Write(icmpv6Buf)
}
switch reject.Reason {
case yggdrasil.PacketTooBig:
if mtu, ok := reject.Detail.(int); ok {
// Create the Packet Too Big response
ptb := &icmp.PacketTooBig{
MTU: int(mtu),
Data: reject.Packet,
}
// Create the ICMPv6 response from it
icmpv6Buf, err := CreateICMPv6(
reject.Packet[8:24], reject.Packet[24:40],
ipv6.ICMPTypePacketTooBig, 0, ptb)
// Send the ICMPv6 response back to the TUN/TAP adapter
if err == nil {
tun.iface.Write(icmpv6Buf)
}
fallthrough
default:
continue
}
fallthrough
default:
continue
}
case data := <-tun.Recv:
if tun.iface == nil {
continue
}
if tun.iface.IsTAP() {
var destAddr address.Address
var dstAddr address.Address
if data[0]&0xf0 == 0x60 {
if len(data) < 40 {
//panic("Tried to send a packet shorter than an IPv6 header...")
util.PutBytes(data)
continue
}
copy(destAddr[:16], data[24:])
copy(dstAddr[:16], data[24:])
} else if data[0]&0xf0 == 0x40 {
if len(data) < 20 {
//panic("Tried to send a packet shorter than an IPv4 header...")
util.PutBytes(data)
continue
}
copy(destAddr[:4], data[16:])
copy(dstAddr[:4], data[16:])
} else {
return errors.New("Invalid address family")
}
sendndp := func(destAddr address.Address) {
neigh, known := tun.icmpv6.peermacs[destAddr]
sendndp := func(dstAddr address.Address) {
neigh, known := tun.icmpv6.peermacs[dstAddr]
known = known && (time.Since(neigh.lastsolicitation).Seconds() < 30)
if !known {
request, err := tun.icmpv6.CreateNDPL2(destAddr)
request, err := tun.icmpv6.CreateNDPL2(dstAddr)
if err != nil {
panic(err)
}
if _, err := tun.iface.Write(request); err != nil {
panic(err)
}
tun.icmpv6.peermacs[destAddr] = neighbor{
tun.icmpv6.peermacs[dstAddr] = neighbor{
lastsolicitation: time.Now(),
}
}
@ -242,19 +371,19 @@ func (tun *TunAdapter) write() error {
var peermac macAddress
var peerknown bool
if data[0]&0xf0 == 0x40 {
destAddr = tun.addr
dstAddr = tun.addr
} else if data[0]&0xf0 == 0x60 {
if !bytes.Equal(tun.addr[:16], destAddr[:16]) && !bytes.Equal(tun.subnet[:8], destAddr[:8]) {
destAddr = tun.addr
if !bytes.Equal(tun.addr[:16], dstAddr[:16]) && !bytes.Equal(tun.subnet[:8], dstAddr[:8]) {
dstAddr = tun.addr
}
}
if neighbor, ok := tun.icmpv6.peermacs[destAddr]; ok && neighbor.learned {
if neighbor, ok := tun.icmpv6.peermacs[dstAddr]; ok && neighbor.learned {
peermac = neighbor.mac
peerknown = true
} else if neighbor, ok := tun.icmpv6.peermacs[tun.addr]; ok && neighbor.learned {
peermac = neighbor.mac
peerknown = true
sendndp(destAddr)
sendndp(dstAddr)
} else {
sendndp(tun.addr)
}
@ -359,3 +488,4 @@ func (tun *TunAdapter) Close() error {
}
return tun.iface.Close()
}
*/

24
src/tuntap/tun_bsd.go
View File

@ -109,14 +109,14 @@ func (tun *TunAdapter) setupAddress(addr string) error {
// Create system socket
if sfd, err = unix.Socket(unix.AF_INET, unix.SOCK_DGRAM, 0); err != nil {
tun.Log.Printf("Create AF_INET socket failed: %v.", err)
tun.log.Printf("Create AF_INET socket failed: %v.", err)
return err
}
// Friendly output
tun.Log.Infof("Interface name: %s", tun.iface.Name())
tun.Log.Infof("Interface IPv6: %s", addr)
tun.Log.Infof("Interface MTU: %d", tun.mtu)
tun.log.Infof("Interface name: %s", tun.iface.Name())
tun.log.Infof("Interface IPv6: %s", addr)
tun.log.Infof("Interface MTU: %d", tun.mtu)
// Create the MTU request
var ir in6_ifreq_mtu
@ -126,15 +126,15 @@ func (tun *TunAdapter) setupAddress(addr string) error {
// Set the MTU
if _, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(sfd), uintptr(syscall.SIOCSIFMTU), uintptr(unsafe.Pointer(&ir))); errno != 0 {
err = errno
tun.Log.Errorf("Error in SIOCSIFMTU: %v", errno)
tun.log.Errorf("Error in SIOCSIFMTU: %v", errno)
// Fall back to ifconfig to set the MTU
cmd := exec.Command("ifconfig", tun.iface.Name(), "mtu", string(tun.mtu))
tun.Log.Warnf("Using ifconfig as fallback: %v", strings.Join(cmd.Args, " "))
tun.log.Warnf("Using ifconfig as fallback: %v", strings.Join(cmd.Args, " "))
output, err := cmd.CombinedOutput()
if err != nil {
tun.Log.Errorf("SIOCSIFMTU fallback failed: %v.", err)
tun.Log.Traceln(string(output))
tun.log.Errorf("SIOCSIFMTU fallback failed: %v.", err)
tun.log.Traceln(string(output))
}
}
@ -155,15 +155,15 @@ func (tun *TunAdapter) setupAddress(addr string) error {
// Set the interface address
if _, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(sfd), uintptr(SIOCSIFADDR_IN6), uintptr(unsafe.Pointer(&ar))); errno != 0 {
err = errno
tun.Log.Errorf("Error in SIOCSIFADDR_IN6: %v", errno)
tun.log.Errorf("Error in SIOCSIFADDR_IN6: %v", errno)
// Fall back to ifconfig to set the address
cmd := exec.Command("ifconfig", tun.iface.Name(), "inet6", addr)
tun.Log.Warnf("Using ifconfig as fallback: %v", strings.Join(cmd.Args, " "))
tun.log.Warnf("Using ifconfig as fallback: %v", strings.Join(cmd.Args, " "))
output, err := cmd.CombinedOutput()
if err != nil {
tun.Log.Errorf("SIOCSIFADDR_IN6 fallback failed: %v.", err)
tun.Log.Traceln(string(output))
tun.log.Errorf("SIOCSIFADDR_IN6 fallback failed: %v.", err)
tun.log.Traceln(string(output))
}
}

14
src/tuntap/tun_darwin.go
View File

@ -18,7 +18,7 @@ import (
// Configures the "utun" adapter with the correct IPv6 address and MTU.
func (tun *TunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int) error {
if iftapmode {
tun.Log.Warnln("TAP mode is not supported on this platform, defaulting to TUN")
tun.log.Warnln("TAP mode is not supported on this platform, defaulting to TUN")
}
config := water.Config{DeviceType: water.TUN}
iface, err := water.New(config)
@ -69,7 +69,7 @@ func (tun *TunAdapter) setupAddress(addr string) error {
var err error
if fd, err = unix.Socket(unix.AF_INET6, unix.SOCK_DGRAM, 0); err != nil {
tun.Log.Printf("Create AF_SYSTEM socket failed: %v.", err)
tun.log.Printf("Create AF_SYSTEM socket failed: %v.", err)
return err
}
@ -98,19 +98,19 @@ func (tun *TunAdapter) setupAddress(addr string) error {
copy(ir.ifr_name[:], tun.iface.Name())
ir.ifru_mtu = uint32(tun.mtu)
tun.Log.Infof("Interface name: %s", ar.ifra_name)
tun.Log.Infof("Interface IPv6: %s", addr)
tun.Log.Infof("Interface MTU: %d", ir.ifru_mtu)
tun.log.Infof("Interface name: %s", ar.ifra_name)
tun.log.Infof("Interface IPv6: %s", addr)
tun.log.Infof("Interface MTU: %d", ir.ifru_mtu)
if _, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), uintptr(darwin_SIOCAIFADDR_IN6), uintptr(unsafe.Pointer(&ar))); errno != 0 {
err = errno
tun.Log.Errorf("Error in darwin_SIOCAIFADDR_IN6: %v", errno)
tun.log.Errorf("Error in darwin_SIOCAIFADDR_IN6: %v", errno)
return err
}
if _, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), uintptr(unix.SIOCSIFMTU), uintptr(unsafe.Pointer(&ir))); errno != 0 {
err = errno
tun.Log.Errorf("Error in SIOCSIFMTU: %v", errno)
tun.log.Errorf("Error in SIOCSIFMTU: %v", errno)
return err
}

6
src/tuntap/tun_linux.go
View File

@ -40,9 +40,9 @@ func (tun *TunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int
}
}
// Friendly output
tun.Log.Infof("Interface name: %s", tun.iface.Name())
tun.Log.Infof("Interface IPv6: %s", addr)
tun.Log.Infof("Interface MTU: %d", tun.mtu)
tun.log.Infof("Interface name: %s", tun.iface.Name())
tun.log.Infof("Interface IPv6: %s", addr)
tun.log.Infof("Interface MTU: %d", tun.mtu)
return tun.setupAddress(addr)
}

2
src/tuntap/tun_other.go
View File

@ -28,6 +28,6 @@ func (tun *TunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int
// We don't know how to set the IPv6 address on an unknown platform, therefore
// write about it to stdout and don't try to do anything further.
func (tun *TunAdapter) setupAddress(addr string) error {
tun.Log.Warnln("Platform not supported, you must set the address of", tun.iface.Name(), "to", addr)
tun.log.Warnln("Platform not supported, you must set the address of", tun.iface.Name(), "to", addr)
return nil
}

32
src/tuntap/tun_windows.go
View File

@ -15,7 +15,7 @@ import (
// delegate the hard work to "netsh".
func (tun *TunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int) error {
if !iftapmode {
tun.Log.Warnln("TUN mode is not supported on this platform, defaulting to TAP")
tun.log.Warnln("TUN mode is not supported on this platform, defaulting to TAP")
}
config := water.Config{DeviceType: water.TAP}
config.PlatformSpecificParams.ComponentID = "tap0901"
@ -31,19 +31,19 @@ func (tun *TunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int
}
// Disable/enable the interface to resets its configuration (invalidating iface)
cmd := exec.Command("netsh", "interface", "set", "interface", iface.Name(), "admin=DISABLED")
tun.Log.Printf("netsh command: %v", strings.Join(cmd.Args, " "))
tun.log.Printf("netsh command: %v", strings.Join(cmd.Args, " "))
output, err := cmd.CombinedOutput()
if err != nil {
tun.Log.Errorf("Windows netsh failed: %v.", err)
tun.Log.Traceln(string(output))
tun.log.Errorf("Windows netsh failed: %v.", err)
tun.log.Traceln(string(output))
return err
}
cmd = exec.Command("netsh", "interface", "set", "interface", iface.Name(), "admin=ENABLED")
tun.Log.Printf("netsh command: %v", strings.Join(cmd.Args, " "))
tun.log.Printf("netsh command: %v", strings.Join(cmd.Args, " "))
output, err = cmd.CombinedOutput()
if err != nil {
tun.Log.Errorf("Windows netsh failed: %v.", err)
tun.Log.Traceln(string(output))
tun.log.Errorf("Windows netsh failed: %v.", err)
tun.log.Traceln(string(output))
return err
}
// Get a new iface
@ -58,9 +58,9 @@ func (tun *TunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int
panic(err)
}
// Friendly output
tun.Log.Infof("Interface name: %s", tun.iface.Name())
tun.Log.Infof("Interface IPv6: %s", addr)
tun.Log.Infof("Interface MTU: %d", tun.mtu)
tun.log.Infof("Interface name: %s", tun.iface.Name())
tun.log.Infof("Interface IPv6: %s", addr)
tun.log.Infof("Interface MTU: %d", tun.mtu)
return tun.setupAddress(addr)
}
@ -71,11 +71,11 @@ func (tun *TunAdapter) setupMTU(mtu int) error {
fmt.Sprintf("interface=%s", tun.iface.Name()),
fmt.Sprintf("mtu=%d", mtu),
"store=active")
tun.Log.Debugln("netsh command: %v", strings.Join(cmd.Args, " "))
tun.log.Debugln("netsh command: %v", strings.Join(cmd.Args, " "))
output, err := cmd.CombinedOutput()
if err != nil {
tun.Log.Errorf("Windows netsh failed: %v.", err)
tun.Log.Traceln(string(output))
tun.log.Errorf("Windows netsh failed: %v.", err)
tun.log.Traceln(string(output))
return err
}
return nil
@ -88,11 +88,11 @@ func (tun *TunAdapter) setupAddress(addr string) error {
fmt.Sprintf("interface=%s", tun.iface.Name()),
fmt.Sprintf("addr=%s", addr),
"store=active")
tun.Log.Debugln("netsh command: %v", strings.Join(cmd.Args, " "))
tun.log.Debugln("netsh command: %v", strings.Join(cmd.Args, " "))
output, err := cmd.CombinedOutput()
if err != nil {
tun.Log.Errorf("Windows netsh failed: %v.", err)
tun.Log.Traceln(string(output))
tun.log.Errorf("Windows netsh failed: %v.", err)
tun.log.Traceln(string(output))
return err
}
return nil

47
src/yggdrasil/adapter.go
View File

@ -1,47 +0,0 @@
package yggdrasil
import (
"github.com/gologme/log"
"github.com/yggdrasil-network/yggdrasil-go/src/address"
"github.com/yggdrasil-network/yggdrasil-go/src/config"
)
// Adapter defines the minimum required struct members for an adapter type. This
// is now the base type for adapters like tun.go. When implementing a new
// adapter type, you should extend the adapter struct with this one and should
// call the Adapter.Init() function when initialising.
type Adapter struct {
adapterImplementation
Core *Core
Config *config.NodeState
Log *log.Logger
Send chan<- []byte
Recv <-chan []byte
Reject <-chan RejectedPacket
Reconfigure chan chan error
}
// Defines the minimum required functions for an adapter type. Note that the
// implementation of Init() should call Adapter.Init(). This is not exported
// because doing so breaks the gomobile bindings for iOS/Android.
type adapterImplementation interface {
Init(*config.NodeState, *log.Logger, chan<- []byte, <-chan []byte, <-chan RejectedPacket)
Name() string
MTU() int
IsTAP() bool
Start(address.Address, address.Subnet) error
Close() error
}
// Init initialises the adapter with the necessary channels to operate from the
// router. When defining a new Adapter type, the Adapter should call this
// function from within it's own Init function to set up the channels. It is
// otherwise not expected for you to call this function directly.
func (adapter *Adapter) Init(config *config.NodeState, log *log.Logger, send chan<- []byte, recv <-chan []byte, reject <-chan RejectedPacket) {
adapter.Config = config
adapter.Log = log
adapter.Send = send
adapter.Recv = recv
adapter.Reject = reject
adapter.Reconfigure = make(chan chan error, 1)
}

19
src/yggdrasil/conn.go
View File

@ -16,7 +16,7 @@ type Conn struct {
nodeID *crypto.NodeID
nodeMask *crypto.NodeID
session *sessionInfo
sessionMutex *sync.RWMutex
mutex *sync.RWMutex
readDeadline time.Time
writeDeadline time.Time
expired bool
@ -30,9 +30,10 @@ func (c *Conn) startSearch() {
return
}
if sinfo != nil {
c.sessionMutex.Lock()
c.mutex.Lock()
c.session = sinfo
c.sessionMutex.Unlock()
c.nodeID, c.nodeMask = sinfo.theirAddr.GetNodeIDandMask()
c.mutex.Unlock()
}
}
doSearch := func() {
@ -65,8 +66,8 @@ func (c *Conn) startSearch() {
}
func (c *Conn) Read(b []byte) (int, error) {
c.sessionMutex.RLock()
defer c.sessionMutex.RUnlock()
c.mutex.RLock()
defer c.mutex.RUnlock()
if c.expired {
return 0, errors.New("session is closed")
}
@ -119,8 +120,8 @@ func (c *Conn) Read(b []byte) (int, error) {
}
func (c *Conn) Write(b []byte) (bytesWritten int, err error) {
c.sessionMutex.RLock()
defer c.sessionMutex.RUnlock()
c.mutex.RLock()
defer c.mutex.RUnlock()
if c.expired {
return 0, errors.New("session is closed")
}
@ -175,7 +176,9 @@ func (c *Conn) LocalAddr() crypto.NodeID {
}
func (c *Conn) RemoteAddr() crypto.NodeID {
return *crypto.GetNodeID(&c.session.theirPermPub)
c.mutex.RLock()
defer c.mutex.RUnlock()
return *c.nodeID
}
func (c *Conn) SetDeadline(t time.Time) error {

68
src/yggdrasil/core.go
View File

@ -5,7 +5,6 @@ import (
"errors"
"io/ioutil"
"net"
"sync"
"time"
"github.com/gologme/log"
@ -77,7 +76,6 @@ func (c *Core) init() error {
c.searches.init(c)
c.dht.init(c)
c.sessions.init(c)
//c.multicast.init(c)
c.peers.init(c)
c.router.init(c)
c.switchTable.init(c) // TODO move before peers? before router?
@ -168,21 +166,6 @@ func BuildVersion() string {
return buildVersion
}
// SetRouterAdapter instructs Yggdrasil to use the given adapter when starting
// the router. The adapter must implement the standard
// adapter.adapterImplementation interface and should extend the adapter.Adapter
// struct.
func (c *Core) SetRouterAdapter(adapter interface{}) error {
// We do this because adapterImplementation is not a valid type for the
// gomobile bindings so we just ask for a generic interface and try to cast it
// to adapterImplementation instead
if a, ok := adapter.(adapterImplementation); ok {
c.router.adapter = a
return nil
}
return errors.New("unsuitable adapter")
}
// Start starts up Yggdrasil using the provided config.NodeConfig, and outputs
// debug logging through the provided log.Logger. The started stack will include
// TCP and UDP sockets, a multicast discovery socket, an admin socket, router,
@ -233,13 +216,6 @@ func (c *Core) Start(nc *config.NodeConfig, log *log.Logger) (*config.NodeState,
return nil, err
}
if c.router.adapter != nil {
if err := c.router.adapter.Start(c.router.addr, c.router.subnet); err != nil {
c.log.Errorln("Failed to start TUN/TAP")
return nil, err
}
}
go c.addPeerLoop()
c.log.Infoln("Startup complete")
@ -249,14 +225,11 @@ func (c *Core) Start(nc *config.NodeConfig, log *log.Logger) (*config.NodeState,
// Stop shuts down the Yggdrasil node.
func (c *Core) Stop() {
c.log.Infoln("Stopping...")
if c.router.adapter != nil {
c.router.adapter.Close()
}
c.admin.close()
}
// ListenConn returns a listener for Yggdrasil session connections.
func (c *Core) ListenConn() (*Listener, error) {
func (c *Core) ConnListen() (*Listener, error) {
c.sessions.listenerMutex.Lock()
defer c.sessions.listenerMutex.Unlock()
if c.sessions.listener != nil {
@ -270,40 +243,11 @@ func (c *Core) ListenConn() (*Listener, error) {
return c.sessions.listener, nil
}
// Dial opens a session to the given node. The first paramter should be "nodeid"
// and the second parameter should contain a hexadecimal representation of the
// target node ID.
func (c *Core) Dial(network, address string) (Conn, error) {
conn := Conn{
sessionMutex: &sync.RWMutex{},
}
nodeID := crypto.NodeID{}
nodeMask := crypto.NodeID{}
// Process
switch network {
case "nodeid":
// A node ID was provided - we don't need to do anything special with it
dest, err := hex.DecodeString(address)
if err != nil {
return Conn{}, err
}
copy(nodeID[:], dest)
for i := range nodeMask {
nodeMask[i] = 0xFF
}
default:
// An unexpected address type was given, so give up
return Conn{}, errors.New("unexpected address type")
}
conn.core = c
conn.nodeID = &nodeID
conn.nodeMask = &nodeMask
conn.core.router.doAdmin(func() {
conn.startSearch()
})
conn.sessionMutex.Lock()
defer conn.sessionMutex.Unlock()
return conn, nil
// ConnDialer returns a dialer for Yggdrasil session connections.
func (c *Core) ConnDialer() (*Dialer, error) {
return &Dialer{
core: c,
}, nil
}
// ListenTCP starts a new TCP listener. The input URI should match that of the

70
src/yggdrasil/dialer.go Normal file
View File

@ -0,0 +1,70 @@
package yggdrasil
import (
"encoding/hex"
"errors"
"fmt"
"strconv"
"strings"
"sync"
"github.com/yggdrasil-network/yggdrasil-go/src/crypto"
)
// Dialer represents an Yggdrasil connection dialer.
type Dialer struct {
core *Core
}
// Dial opens a session to the given node. The first paramter should be "nodeid"
// and the second parameter should contain a hexadecimal representation of the
// target node ID.
func (d *Dialer) Dial(network, address string) (Conn, error) {
conn := Conn{
mutex: &sync.RWMutex{},
}
nodeID := crypto.NodeID{}
nodeMask := crypto.NodeID{}
// Process
switch network {
case "nodeid":
// A node ID was provided - we don't need to do anything special with it
if tokens := strings.Split(address, "/"); len(tokens) == 2 {
len, err := strconv.Atoi(tokens[1])
if err != nil {
return Conn{}, err
}
dest, err := hex.DecodeString(tokens[0])
if err != nil {
return Conn{}, err
}
copy(nodeID[:], dest)
for idx := 0; idx < len; idx++ {
nodeMask[idx/8] |= 0x80 >> byte(idx%8)
}
fmt.Println(nodeID)
fmt.Println(nodeMask)
} else {
dest, err := hex.DecodeString(tokens[0])
if err != nil {
return Conn{}, err
}
copy(nodeID[:], dest)
for i := range nodeMask {
nodeMask[i] = 0xFF
}
}
default:
// An unexpected address type was given, so give up
return Conn{}, errors.New("unexpected address type")
}
conn.core = d.core
conn.nodeID = &nodeID
conn.nodeMask = &nodeMask
conn.core.router.doAdmin(func() {
conn.startSearch()
})
conn.mutex.Lock()
defer conn.mutex.Unlock()
return conn, nil
}

4
src/yggdrasil/router.go
View File

@ -41,7 +41,6 @@ type router struct {
in <-chan []byte // packets we received from the network, link to peer's "out"
out func([]byte) // packets we're sending to the network, link to peer's "in"
toRecv chan router_recvPacket // packets to handle via recvPacket()
adapter adapterImplementation // TUN/TAP adapter
recv chan<- []byte // place where the adapter pulls received packets from
send <-chan []byte // place where the adapter puts outgoing packets
reject chan<- RejectedPacket // place where we send error packets back to adapter
@ -136,9 +135,6 @@ func (r *router) init(core *Core) {
r.nodeinfo.setNodeInfo(r.core.config.Current.NodeInfo, r.core.config.Current.NodeInfoPrivacy)
r.core.config.Mutex.RUnlock()
r.cryptokey.init(r.core)
if r.adapter != nil {
r.adapter.Init(&r.core.config, r.core.log, send, recv, reject)
}
}
// Starts the mainLoop goroutine.

14
src/yggdrasil/session.go
View File

@ -289,9 +289,7 @@ func (ss *sessions) createSession(theirPermKey *crypto.BoxPubKey) *sessionInfo {
sinfo.mySesPriv = *priv
sinfo.myNonce = *crypto.NewBoxNonce()
sinfo.theirMTU = 1280
if ss.core.router.adapter != nil {
sinfo.myMTU = uint16(ss.core.router.adapter.MTU())
}
sinfo.myMTU = 1280
now := time.Now()
sinfo.timeMutex.Lock()
sinfo.time = now
@ -480,11 +478,11 @@ func (ss *sessions) handlePing(ping *sessionPing) {
ss.listenerMutex.Lock()
if ss.listener != nil {
conn := &Conn{
core: ss.core,
session: sinfo,
sessionMutex: &sync.RWMutex{},
nodeID: crypto.GetNodeID(&sinfo.theirPermPub),
nodeMask: &crypto.NodeID{},
core: ss.core,
session: sinfo,
mutex: &sync.RWMutex{},
nodeID: crypto.GetNodeID(&sinfo.theirPermPub),
nodeMask: &crypto.NodeID{},
}
for i := range conn.nodeMask {
conn.nodeMask[i] = 0xFF