cwinfo/yggdrasil-go
5
0
Fork 0
mirror of https://github.com/cwinfo/yggdrasil-go.git synced 2024-11-10 07:30:27 +00:00
Code Releases Activity

Merge pull request #10 from yggdrasil-network/develop

Browse Source 
Branch Develop: Base to Fork
This commit is contained in:
Christer Warén 2019-01-30 13:02:34 +02:00 committed by GitHub
commit 6e196b9f81
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
26 changed files with 975 additions and 533 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

301
cmd/yggdrasil/main.go
View File

@ -6,16 +6,14 @@ import (
"flag"
"fmt"
"io/ioutil"
"log"
"os"
"os/signal"
"regexp"
"strings"
"syscall"
"time"
"golang.org/x/text/encoding/unicode"
"github.com/gologme/log"
"github.com/hjson/hjson-go"
"github.com/kardianos/minwinsvc"
"github.com/mitchellh/mapstructure"
@ -31,6 +29,119 @@ type node struct {
core Core
}
func readConfig(useconf *bool, useconffile *string, normaliseconf *bool) *nodeConfig {
// Use a configuration file. If -useconf, the configuration will be read
// from stdin. If -useconffile, the configuration will be read from the
// filesystem.
var conf []byte
var err error
if *useconffile != "" {
// Read the file from the filesystem
conf, err = ioutil.ReadFile(*useconffile)
} else {
// Read the file from stdin.
conf, err = ioutil.ReadAll(os.Stdin)
}
if err != nil {
panic(err)
}
// If there's a byte order mark - which Windows 10 is now incredibly fond of
// throwing everywhere when it's converting things into UTF-16 for the hell
// of it - remove it and decode back down into UTF-8. This is necessary
// because hjson doesn't know what to do with UTF-16 and will panic
if bytes.Compare(conf[0:2], []byte{0xFF, 0xFE}) == 0 ||
bytes.Compare(conf[0:2], []byte{0xFE, 0xFF}) == 0 {
utf := unicode.UTF16(unicode.BigEndian, unicode.UseBOM)
decoder := utf.NewDecoder()
conf, err = decoder.Bytes(conf)
if err != nil {
panic(err)
}
}
// Generate a new configuration - this gives us a set of sane defaults -
// then parse the configuration we loaded above on top of it. The effect
// of this is that any configuration item that is missing from the provided
// configuration will use a sane default.
cfg := config.GenerateConfig(false)
var dat map[string]interface{}
if err := hjson.Unmarshal(conf, &dat); err != nil {
panic(err)
}
confJson, err := json.Marshal(dat)
if err != nil {
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": "",
"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: Deprecated config option", from, "- please remove")
}
} else {
if !*normaliseconf {
log.Println("Warning: Deprecated config option", from, "- please rename 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{}) {
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
}
}
}
// Overlay our newly mapped configuration onto the autoconf node config that
// we generated above.
if err = mapstructure.Decode(dat, &cfg); err != nil {
panic(err)
}
return cfg
}
// Generates a new configuration and returns it in HJSON format. This is used
// with -genconf.
func doGenconf(isjson bool) string {
@ -58,9 +169,11 @@ func main() {
confjson := flag.Bool("json", false, "print configuration from -genconf or -normaliseconf as JSON instead of HJSON")
autoconf := flag.Bool("autoconf", false, "automatic mode (dynamic IP, peer with IPv6 neighbors)")
version := flag.Bool("version", false, "prints the version of this build")
logging := flag.String("logging", "info,warn,error", "comma-separated list of logging levels to enable")
flag.Parse()
var cfg *nodeConfig
var err error
switch {
case *version:
fmt.Println("Build name:", yggdrasil.GetBuildName())
@ -71,114 +184,8 @@ func main() {
// port numbers, and will use an automatically selected TUN/TAP interface.
cfg = config.GenerateConfig(true)
case *useconffile != "" || *useconf:
// Use a configuration file. If -useconf, the configuration will be read
// from stdin. If -useconffile, the configuration will be read from the
// filesystem.
var configjson []byte
var err error
if *useconffile != "" {
// Read the file from the filesystem
configjson, err = ioutil.ReadFile(*useconffile)
} else {
// Read the file from stdin.
configjson, err = ioutil.ReadAll(os.Stdin)
}
if err != nil {
panic(err)
}
// If there's a byte order mark - which Windows 10 is now incredibly fond of
// throwing everywhere when it's converting things into UTF-16 for the hell
// of it - remove it and decode back down into UTF-8. This is necessary
// because hjson doesn't know what to do with UTF-16 and will panic
if bytes.Compare(configjson[0:2], []byte{0xFF, 0xFE}) == 0 ||
bytes.Compare(configjson[0:2], []byte{0xFE, 0xFF}) == 0 {
utf := unicode.UTF16(unicode.BigEndian, unicode.UseBOM)
decoder := utf.NewDecoder()
configjson, err = decoder.Bytes(configjson)
if err != nil {
panic(err)
}
}
// Generate a new configuration - this gives us a set of sane defaults -
// then parse the configuration we loaded above on top of it. The effect
// of this is that any configuration item that is missing from the provided
// configuration will use a sane default.
cfg = config.GenerateConfig(false)
var dat map[string]interface{}
if err := hjson.Unmarshal(configjson, &dat); err != nil {
panic(err)
}
confJson, err := json.Marshal(dat)
if err != nil {
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": "",
"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: Deprecated config option", from, "- please remove")
}
} else {
if !*normaliseconf {
log.Println("Warning: Deprecated config option", from, "- please rename 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{}) {
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
}
}
}
// Overlay our newly mapped configuration onto the autoconf node config that
// we generated above.
if err = mapstructure.Decode(dat, &cfg); err != nil {
panic(err)
}
// Read the configuration from either stdin or from the filesystem
cfg = readConfig(useconf, useconffile, normaliseconf)
// If the -normaliseconf option was specified then remarshal the above
// configuration and print it back to stdout. This lets the user update
// their configuration file with newly mapped names (like above) or to
@ -211,51 +218,30 @@ func main() {
}
// Create a new logger that logs output to stdout.
logger := log.New(os.Stdout, "", log.Flags())
//logger.EnableLevel("error")
//logger.EnableLevel("warn")
//logger.EnableLevel("info")
if levels := strings.Split(*logging, ","); len(levels) > 0 {
for _, level := range levels {
l := strings.TrimSpace(level)
switch l {
case "error", "warn", "info", "trace", "debug":
logger.EnableLevel(l)
default:
continue
}
}
}
// Setup the Yggdrasil node itself. The node{} type includes a Core, so we
// don't need to create this manually.
n := node{}
// Check to see if any multicast interface expressions were provided in the
// config. If they were then set them now.
for _, ll := range cfg.MulticastInterfaces {
ifceExpr, err := regexp.Compile(ll)
if err != nil {
panic(err)
}
n.core.AddMulticastInterfaceExpr(ifceExpr)
}
// Now that we have a working configuration, we can now actually start
// Yggdrasil. This will start the router, switch, DHT node, TCP and UDP
// sockets, TUN/TAP adapter and multicast discovery port.
if err := n.core.Start(cfg, logger); err != nil {
logger.Println("An error occurred during startup")
logger.Errorln("An error occurred during startup")
panic(err)
}
// Check to see if any allowed encryption keys were provided in the config.
// If they were then set them now.
for _, pBoxStr := range cfg.AllowedEncryptionPublicKeys {
n.core.AddAllowedEncryptionPublicKey(pBoxStr)
}
// If any static peers were provided in the configuration above then we should
// configure them. The loop ensures that disconnected peers will eventually
// be reconnected with.
go func() {
if len(cfg.Peers) == 0 && len(cfg.InterfacePeers) == 0 {
return
}
for {
for _, peer := range cfg.Peers {
n.core.AddPeer(peer, "")
time.Sleep(time.Second)
}
for intf, intfpeers := range cfg.InterfacePeers {
for _, peer := range intfpeers {
n.core.AddPeer(peer, intf)
time.Sleep(time.Second)
}
}
time.Sleep(time.Minute)
}
}()
// The Stop function ensures that the TUN/TAP adapter is correctly shut down
// before the program exits.
defer func() {
@ -265,11 +251,13 @@ func main() {
// This is just logged to stdout for the user.
address := n.core.GetAddress()
subnet := n.core.GetSubnet()
logger.Printf("Your IPv6 address is %s", address.String())
logger.Printf("Your IPv6 subnet is %s", subnet.String())
logger.Infof("Your IPv6 address is %s", address.String())
logger.Infof("Your IPv6 subnet is %s", subnet.String())
// Catch interrupts from the operating system to exit gracefully.
c := make(chan os.Signal, 1)
r := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt, syscall.SIGTERM)
signal.Notify(r, os.Interrupt, syscall.SIGHUP)
// Create a function to capture the service being stopped on Windows.
winTerminate := func() {
c <- os.Interrupt
@ -277,5 +265,18 @@ func main() {
minwinsvc.SetOnExit(winTerminate)
// Wait for the terminate/interrupt signal. Once a signal is received, the
// deferred Stop function above will run which will shut down TUN/TAP.
<-c
for {
select {
case _ = <-r:
if *useconffile != "" {
cfg = readConfig(useconf, useconffile, normaliseconf)
n.core.UpdateConfig(cfg)
} else {
logger.Errorln("Reloading config at runtime is only possible with -useconffile")
}
case _ = <-c:
goto exit
}
}
exit:
}

125
contrib/ansible/genkeys.go Normal file
View File

@ -0,0 +1,125 @@
/*
This file generates crypto keys for [ansible-yggdrasil](https://github.com/jcgruenhage/ansible-yggdrasil/)
*/
package main
import (
"encoding/hex"
"flag"
"fmt"
"net"
"os"
"github.com/yggdrasil-network/yggdrasil-go/src/address"
"github.com/yggdrasil-network/yggdrasil-go/src/crypto"
)
var numHosts = flag.Int("hosts", 1, "number of host vars to generate")
var keyTries = flag.Int("tries", 1000, "number of tries before taking the best keys")
type keySet struct {
priv []byte
pub []byte
id []byte
ip string
}
func main() {
flag.Parse()
if *numHosts > *keyTries {
println("Can't generate less keys than hosts.")
return
}
var encryptionKeys []keySet
for i := 0; i < *numHosts + 1; i++ {
encryptionKeys = append(encryptionKeys, newBoxKey())
}
encryptionKeys = sortKeySetArray(encryptionKeys)
for i := 0; i < *keyTries - *numHosts - 1; i++ {
encryptionKeys[0] = newBoxKey();
encryptionKeys = bubbleUpTo(encryptionKeys, 0)
}
var signatureKeys []keySet
for i := 0; i < *numHosts + 1; i++ {
signatureKeys = append(signatureKeys, newSigKey())
}
signatureKeys = sortKeySetArray(signatureKeys)
for i := 0; i < *keyTries - *numHosts - 1; i++ {
signatureKeys[0] = newSigKey();
signatureKeys = bubbleUpTo(signatureKeys, 0)
}
os.MkdirAll("host_vars", 0755)
for i := 1; i <= *numHosts; i++ {
os.MkdirAll(fmt.Sprintf("host_vars/%x", i), 0755)
file, err := os.Create(fmt.Sprintf("host_vars/%x/vars", i))
if err != nil {
return
}
defer file.Close()
file.WriteString(fmt.Sprintf("yggdrasil_encryption_public_key: %v\n", hex.EncodeToString(encryptionKeys[i].pub)))
file.WriteString("yggdrasil_encryption_private_key: \"{{ vault_yggdrasil_encryption_private_key }}\"\n")
file.WriteString(fmt.Sprintf("yggdrasil_signing_public_key: %v\n", hex.EncodeToString(signatureKeys[i].pub)))
file.WriteString("yggdrasil_signing_private_key: \"{{ vault_yggdrasil_signing_private_key }}\"\n")
file.WriteString(fmt.Sprintf("ansible_host: %v\n", encryptionKeys[i].ip))
file, err = os.Create(fmt.Sprintf("host_vars/%x/vault", i))
if err != nil {
return
}
defer file.Close()
file.WriteString(fmt.Sprintf("vault_yggdrasil_encryption_private_key: %v\n", hex.EncodeToString(encryptionKeys[i].priv)))
file.WriteString(fmt.Sprintf("vault_yggdrasil_signing_private_key: %v\n", hex.EncodeToString(signatureKeys[i].priv)))
}
}
func newBoxKey() keySet {
pub, priv := crypto.NewBoxKeys()
id := crypto.GetNodeID(pub)
ip := net.IP(address.AddrForNodeID(id)[:]).String()
return keySet{priv[:], pub[:], id[:], ip}
}
func newSigKey() keySet {
pub, priv := crypto.NewSigKeys()
id := crypto.GetTreeID(pub)
return keySet{priv[:], pub[:], id[:], ""}
}
func isBetter(oldID, newID []byte) bool {
for idx := range oldID {
if newID[idx] > oldID[idx] {
return true
}
if newID[idx] < oldID[idx] {
return false
}
}
return false
}
func sortKeySetArray(sets []keySet) []keySet {
for i := 0; i < len(sets); i++ {
sets = bubbleUpTo(sets, i)
}
return sets
}
func bubbleUpTo(sets []keySet, num int) []keySet {
for i := 0; i < len(sets) - num - 1; i++ {
if isBetter(sets[i + 1].id, sets[i].id) {
var tmp = sets[i]
sets[i] = sets[i + 1]
sets[i + 1] = tmp
} else {
break
}
}
return sets
}

1
go.mod
View File

@ -5,6 +5,7 @@ require (
github.com/hjson/hjson-go v0.0.0-20181010104306-a25ecf6bd222
github.com/kardianos/minwinsvc v0.0.0-20151122163309-cad6b2b879b0
github.com/mitchellh/mapstructure v1.1.2
github.com/gologme/log v0.0.0-20181207131047-4e5d8ccb38e8
github.com/songgao/packets v0.0.0-20160404182456-549a10cd4091
github.com/yggdrasil-network/water v0.0.0-20180615095340-f732c88f34ae
golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9

2
go.sum
View File

@ -18,3 +18,5 @@ golang.org/x/sys v0.0.0-20181206074257-70b957f3b65e h1:njOxP/wVblhCLIUhjHXf6X+dz
golang.org/x/sys v0.0.0-20181206074257-70b957f3b65e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
github.com/gologme/log v0.0.0-20181207131047-4e5d8ccb38e8 h1:WD8iJ37bRNwvETMfVTusVSAi0WdXTpfNVGY2aHycNKY=
github.com/gologme/log v0.0.0-20181207131047-4e5d8ccb38e8/go.mod h1:gq31gQ8wEHkR+WekdWsqDuf8pXTUZA9BnnzTuPz1Y9U=

8
src/yggdrasil/adapter.go
View File

@ -3,9 +3,10 @@ package yggdrasil
// Defines the minimum required struct members for an adapter type (this is
// now the base type for tunAdapter in tun.go)
type Adapter struct {
core *Core
send chan<- []byte
recv <-chan []byte
core *Core
send chan<- []byte
recv <-chan []byte
reconfigure chan chan error
}
// Initialises the adapter.
@ -13,4 +14,5 @@ func (adapter *Adapter) init(core *Core, send chan<- []byte, recv <-chan []byte)
adapter.core = core
adapter.send = send
adapter.recv = recv
adapter.reconfigure = make(chan chan error, 1)
}

77
src/yggdrasil/admin.go
View File

@ -22,10 +22,11 @@ import (
// TODO: Add authentication
type admin struct {
core *Core
listenaddr string
listener net.Listener
handlers []admin_handlerInfo
core *Core
reconfigure chan chan error
listenaddr string
listener net.Listener
handlers []admin_handlerInfo
}
type admin_info map[string]interface{}
@ -51,9 +52,25 @@ func (a *admin) addHandler(name string, args []string, handler func(admin_info)
}
// init runs the initial admin setup.
func (a *admin) init(c *Core, listenaddr string) {
func (a *admin) init(c *Core) {
a.core = c
a.listenaddr = listenaddr
a.reconfigure = make(chan chan error, 1)
go func() {
for {
e := <-a.reconfigure
a.core.configMutex.RLock()
if a.core.config.AdminListen != a.core.configOld.AdminListen {
a.listenaddr = a.core.config.AdminListen
a.close()
a.start()
}
a.core.configMutex.RUnlock()
e <- nil
}
}()
a.core.configMutex.RLock()
a.listenaddr = a.core.config.AdminListen
a.core.configMutex.RUnlock()
a.addHandler("list", []string{}, func(in admin_info) (admin_info, error) {
handlers := make(map[string]interface{})
for _, handler := range a.handlers {
@ -331,7 +348,10 @@ func (a *admin) init(c *Core, listenaddr string) {
}
var box_pub_key, coords string
if in["box_pub_key"] == nil && in["coords"] == nil {
nodeinfo := []byte(a.core.nodeinfo.getNodeInfo())
var nodeinfo []byte
a.core.router.doAdmin(func() {
nodeinfo = []byte(a.core.router.nodeinfo.getNodeInfo())
})
var jsoninfo interface{}
if err := json.Unmarshal(nodeinfo, &jsoninfo); err != nil {
return admin_info{}, err
@ -378,7 +398,7 @@ func (a *admin) listen() {
switch strings.ToLower(u.Scheme) {
case "unix":
if _, err := os.Stat(a.listenaddr[7:]); err == nil {
a.core.log.Println("WARNING:", a.listenaddr[7:], "already exists and may be in use by another process")
a.core.log.Warnln("WARNING:", a.listenaddr[7:], "already exists and may be in use by another process")
}
a.listener, err = net.Listen("unix", a.listenaddr[7:])
if err == nil {
@ -386,7 +406,7 @@ func (a *admin) listen() {
case "@": // maybe abstract namespace
default:
if err := os.Chmod(a.listenaddr[7:], 0660); err != nil {
a.core.log.Println("WARNING:", a.listenaddr[:7], "may have unsafe permissions!")
a.core.log.Warnln("WARNING:", a.listenaddr[:7], "may have unsafe permissions!")
}
}
}
@ -400,10 +420,10 @@ func (a *admin) listen() {
a.listener, err = net.Listen("tcp", a.listenaddr)
}
if err != nil {
a.core.log.Printf("Admin socket failed to listen: %v", err)
a.core.log.Errorf("Admin socket failed to listen: %v", err)
os.Exit(1)
}
a.core.log.Printf("%s admin socket listening on %s",
a.core.log.Infof("%s admin socket listening on %s",
strings.ToUpper(a.listener.Addr().Network()),
a.listener.Addr().String())
defer a.listener.Close()
@ -430,9 +450,9 @@ func (a *admin) handleRequest(conn net.Conn) {
"status": "error",
"error": "Unrecoverable error, possibly as a result of invalid input types or malformed syntax",
}
fmt.Println("Admin socket error:", r)
a.core.log.Errorln("Admin socket error:", r)
if err := encoder.Encode(&send); err != nil {
fmt.Println("Admin socket JSON encode error:", err)
a.core.log.Errorln("Admin socket JSON encode error:", err)
}
conn.Close()
}
@ -745,35 +765,20 @@ func (a *admin) getData_getSessions() []admin_nodeInfo {
// getAllowedEncryptionPublicKeys returns the public keys permitted for incoming peer connections.
func (a *admin) getAllowedEncryptionPublicKeys() []string {
pubs := a.core.peers.getAllowedEncryptionPublicKeys()
var out []string
for _, pub := range pubs {
out = append(out, hex.EncodeToString(pub[:]))
}
return out
return a.core.peers.getAllowedEncryptionPublicKeys()
}
// addAllowedEncryptionPublicKey whitelists a key for incoming peer connections.
func (a *admin) addAllowedEncryptionPublicKey(bstr string) (err error) {
boxBytes, err := hex.DecodeString(bstr)
if err == nil {
var box crypto.BoxPubKey
copy(box[:], boxBytes)
a.core.peers.addAllowedEncryptionPublicKey(&box)
}
return
a.core.peers.addAllowedEncryptionPublicKey(bstr)
return nil
}
// removeAllowedEncryptionPublicKey removes a key from the whitelist for incoming peer connections.
// If none are set, an empty list permits all incoming connections.
func (a *admin) removeAllowedEncryptionPublicKey(bstr string) (err error) {
boxBytes, err := hex.DecodeString(bstr)
if err == nil {
var box crypto.BoxPubKey
copy(box[:], boxBytes)
a.core.peers.removeAllowedEncryptionPublicKey(&box)
}
return
a.core.peers.removeAllowedEncryptionPublicKey(bstr)
return nil
}
// Send a DHT ping to the node with the provided key and coords, optionally looking up the specified target NodeID.
@ -842,7 +847,7 @@ func (a *admin) admin_getNodeInfo(keyString, coordString string, nocache bool) (
copy(key[:], keyBytes)
}
if !nocache {
if response, err := a.core.nodeinfo.getCachedNodeInfo(key); err == nil {
if response, err := a.core.router.nodeinfo.getCachedNodeInfo(key); err == nil {
return response, nil
}
}
@ -860,14 +865,14 @@ func (a *admin) admin_getNodeInfo(keyString, coordString string, nocache bool) (
}
response := make(chan *nodeinfoPayload, 1)
sendNodeInfoRequest := func() {
a.core.nodeinfo.addCallback(key, func(nodeinfo *nodeinfoPayload) {
a.core.router.nodeinfo.addCallback(key, func(nodeinfo *nodeinfoPayload) {
defer func() { recover() }()
select {
case response <- nodeinfo:
default:
}
})
a.core.nodeinfo.sendNodeInfo(key, coords, false)
a.core.router.nodeinfo.sendNodeInfo(key, coords, false)
}
a.core.router.doAdmin(sendNodeInfoRequest)
go func() {

12
src/yggdrasil/awdl.go
View File

@ -50,24 +50,24 @@ func (l *awdl) create(fromAWDL chan []byte, toAWDL chan []byte /*boxPubKey *cryp
meta.sig = l.core.sigPub
meta.link = *myLinkPub
metaBytes := meta.encode()
l.core.log.Println("toAWDL <- metaBytes")
l.core.log.Traceln("toAWDL <- metaBytes")
toAWDL <- metaBytes
l.core.log.Println("metaBytes = <-fromAWDL")
l.core.log.Traceln("metaBytes = <-fromAWDL")
metaBytes = <-fromAWDL
l.core.log.Println("version_metadata{}")
l.core.log.Traceln("version_metadata{}")
meta = version_metadata{}
if !meta.decode(metaBytes) || !meta.check() {
return nil, errors.New("Metadata decode failure")
}
l.core.log.Println("version_getBaseMetadata{}")
l.core.log.Traceln("version_getBaseMetadata{}")
base := version_getBaseMetadata()
if meta.ver > base.ver || meta.ver == base.ver && meta.minorVer > base.minorVer {
return nil, errors.New("Failed to connect to node: " + name + " version: " + fmt.Sprintf("%d.%d", meta.ver, meta.minorVer))
}
l.core.log.Println("crypto.GetSharedKey")
l.core.log.Traceln("crypto.GetSharedKey")
shared := crypto.GetSharedKey(myLinkPriv, &meta.link)
//shared := crypto.GetSharedKey(&l.core.boxPriv, boxPubKey)
l.core.log.Println("l.core.peers.newPeer")
l.core.log.Traceln("l.core.peers.newPeer")
intf.peer = l.core.peers.newPeer(&meta.box, &meta.sig, shared, name)
if intf.peer != nil {
intf.peer.linkOut = make(chan []byte, 1) // protocol traffic

78
src/yggdrasil/ckr.go
View File

@ -18,6 +18,7 @@ import (
type cryptokey struct {
core *Core
enabled bool
reconfigure chan chan error
ipv4routes []cryptokey_route
ipv6routes []cryptokey_route
ipv4cache map[address.Address]cryptokey_route
@ -34,12 +35,75 @@ type cryptokey_route struct {
// Initialise crypto-key routing. This must be done before any other CKR calls.
func (c *cryptokey) init(core *Core) {
c.core = core
c.ipv4routes = make([]cryptokey_route, 0)
c.reconfigure = make(chan chan error, 1)
go func() {
for {
e := <-c.reconfigure
var err error
c.core.router.doAdmin(func() {
err = c.core.router.cryptokey.configure()
})
e <- err
}
}()
if err := c.configure(); err != nil {
c.core.log.Errorln("CKR configuration failed:", err)
}
}
// Configure the CKR routes - this must only ever be called from the router
// goroutine, e.g. through router.doAdmin
func (c *cryptokey) configure() error {
c.core.configMutex.RLock()
defer c.core.configMutex.RUnlock()
// Set enabled/disabled state
c.setEnabled(c.core.config.TunnelRouting.Enable)
// Clear out existing routes
c.ipv6routes = make([]cryptokey_route, 0)
c.ipv4routes = make([]cryptokey_route, 0)
// Add IPv6 routes
for ipv6, pubkey := range c.core.config.TunnelRouting.IPv6Destinations {
if err := c.addRoute(ipv6, pubkey); err != nil {
return err
}
}
// Add IPv4 routes
for ipv4, pubkey := range c.core.config.TunnelRouting.IPv4Destinations {
if err := c.addRoute(ipv4, pubkey); err != nil {
return err
}
}
// Clear out existing sources
c.ipv6sources = make([]net.IPNet, 0)
c.ipv4sources = make([]net.IPNet, 0)
// Add IPv6 sources
c.ipv6sources = make([]net.IPNet, 0)
for _, source := range c.core.config.TunnelRouting.IPv6Sources {
if err := c.addSourceSubnet(source); err != nil {
return err
}
}
// Add IPv4 sources
c.ipv4sources = make([]net.IPNet, 0)
for _, source := range c.core.config.TunnelRouting.IPv4Sources {
if err := c.addSourceSubnet(source); err != nil {
return err
}
}
// Wipe the caches
c.ipv4cache = make(map[address.Address]cryptokey_route, 0)
c.ipv6cache = make(map[address.Address]cryptokey_route, 0)
c.ipv4sources = make([]net.IPNet, 0)
c.ipv6sources = make([]net.IPNet, 0)
return nil
}
// Enable or disable crypto-key routing.
@ -128,7 +192,7 @@ func (c *cryptokey) addSourceSubnet(cidr string) error {
// Add the source subnet
*routingsources = append(*routingsources, *ipnet)
c.core.log.Println("Added CKR source subnet", cidr)
c.core.log.Infoln("Added CKR source subnet", cidr)
return nil
}
@ -200,7 +264,7 @@ func (c *cryptokey) addRoute(cidr string, dest string) error {
delete(*routingcache, k)
}
c.core.log.Println("Added CKR destination subnet", cidr)
c.core.log.Infoln("Added CKR destination subnet", cidr)
return nil
}
}
@ -294,7 +358,7 @@ func (c *cryptokey) removeSourceSubnet(cidr string) error {
for idx, subnet := range *routingsources {
if subnet.String() == ipnet.String() {
*routingsources = append((*routingsources)[:idx], (*routingsources)[idx+1:]...)
c.core.log.Println("Removed CKR source subnet", cidr)
c.core.log.Infoln("Removed CKR source subnet", cidr)
return nil
}
}
@ -343,7 +407,7 @@ func (c *cryptokey) removeRoute(cidr string, dest string) error {
for k := range *routingcache {
delete(*routingcache, k)
}
c.core.log.Printf("Removed CKR destination subnet %s via %s\n", cidr, dest)
c.core.log.Infoln("Removed CKR destination subnet %s via %s\n", cidr, dest)
return nil
}
}

230
src/yggdrasil/core.go
View File

@ -2,11 +2,12 @@ package yggdrasil
import (
"encoding/hex"
"fmt"
"io/ioutil"
"log"
"net"
"regexp"
"sync"
"time"
"github.com/gologme/log"
"github.com/yggdrasil-network/yggdrasil-go/src/address"
"github.com/yggdrasil-network/yggdrasil-go/src/config"
@ -17,10 +18,20 @@ import (
var buildName string
var buildVersion string
type module interface {
init(*Core, *config.NodeConfig) error
start() error
}
// The Core object represents the Yggdrasil node. You should create a Core
// object for each Yggdrasil node you plan to run.
type Core struct {
// This is the main data structure that holds everything else for a node
// We're going to keep our own copy of the provided config - that way we can
// guarantee that it will be covered by the mutex
config config.NodeConfig // Active config
configOld config.NodeConfig // Previous config
configMutex sync.RWMutex // Protects both config and configOld
boxPub crypto.BoxPubKey
boxPriv crypto.BoxPrivKey
sigPub crypto.SigPubKey
@ -33,17 +44,12 @@ type Core struct {
admin admin
searches searches
multicast multicast
nodeinfo nodeinfo
tcp tcpInterface
awdl awdl
log *log.Logger
ifceExpr []*regexp.Regexp // the zone of link-local IPv6 peers must match this
}
func (c *Core) init(bpub *crypto.BoxPubKey,
bpriv *crypto.BoxPrivKey,
spub *crypto.SigPubKey,
spriv *crypto.SigPrivKey) {
func (c *Core) init() error {
// TODO separate init and start functions
// Init sets up structs
// Start launches goroutines that depend on structs being set up
@ -51,20 +57,104 @@ func (c *Core) init(bpub *crypto.BoxPubKey,
if c.log == nil {
c.log = log.New(ioutil.Discard, "", 0)
}
c.boxPub, c.boxPriv = *bpub, *bpriv
c.sigPub, c.sigPriv = *spub, *spriv
c.admin.core = c
boxPubHex, err := hex.DecodeString(c.config.EncryptionPublicKey)
if err != nil {
return err
}
boxPrivHex, err := hex.DecodeString(c.config.EncryptionPrivateKey)
if err != nil {
return err
}
sigPubHex, err := hex.DecodeString(c.config.SigningPublicKey)
if err != nil {
return err
}
sigPrivHex, err := hex.DecodeString(c.config.SigningPrivateKey)
if err != nil {
return err
}
copy(c.boxPub[:], boxPubHex)
copy(c.boxPriv[:], boxPrivHex)
copy(c.sigPub[:], sigPubHex)
copy(c.sigPriv[:], sigPrivHex)
c.admin.init(c)
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, c.sigPub) // TODO move before peers? before router?
c.switchTable.init(c) // TODO move before peers? before router?
return nil
}
// Get the current build name. This is usually injected if built from git,
// or returns "unknown" otherwise.
// If any static peers were provided in the configuration above then we should
// configure them. The loop ensures that disconnected peers will eventually
// be reconnected with.
func (c *Core) addPeerLoop() {
for {
// Get the peers from the config - these could change!
c.configMutex.RLock()
peers := c.config.Peers
interfacepeers := c.config.InterfacePeers
c.configMutex.RUnlock()
// Add peers from the Peers section
for _, peer := range peers {
c.AddPeer(peer, "")
time.Sleep(time.Second)
}
// Add peers from the InterfacePeers section
for intf, intfpeers := range interfacepeers {
for _, peer := range intfpeers {
c.AddPeer(peer, intf)
time.Sleep(time.Second)
}
}
// Sit for a while
time.Sleep(time.Minute)
}
}
// UpdateConfig updates the configuration in Core and then signals the
// various module goroutines to reconfigure themselves if needed
func (c *Core) UpdateConfig(config *config.NodeConfig) {
c.configMutex.Lock()
c.configOld = c.config
c.config = *config
c.configMutex.Unlock()
components := []chan chan error{
c.admin.reconfigure,
c.searches.reconfigure,
c.dht.reconfigure,
c.sessions.reconfigure,
c.peers.reconfigure,
c.router.reconfigure,
c.router.tun.reconfigure,
c.router.cryptokey.reconfigure,
c.switchTable.reconfigure,
c.tcp.reconfigure,
c.multicast.reconfigure,
}
for _, component := range components {
response := make(chan error)
component <- response
if err := <-response; err != nil {
c.log.Println(err)
}
}
}
// GetBuildName gets the current build name. This is usually injected if built
// from git, or returns "unknown" otherwise.
func GetBuildName() string {
if buildName == "" {
return "unknown"
@ -89,52 +179,28 @@ func (c *Core) Start(nc *config.NodeConfig, log *log.Logger) error {
c.log = log
if name := GetBuildName(); name != "unknown" {
c.log.Println("Build name:", name)
c.log.Infoln("Build name:", name)
}
if version := GetBuildVersion(); version != "unknown" {
c.log.Println("Build version:", version)
c.log.Infoln("Build version:", version)
}
c.log.Println("Starting up...")
c.log.Infoln("Starting up...")
var boxPub crypto.BoxPubKey
var boxPriv crypto.BoxPrivKey
var sigPub crypto.SigPubKey
var sigPriv crypto.SigPrivKey
boxPubHex, err := hex.DecodeString(nc.EncryptionPublicKey)
if err != nil {
return err
}
boxPrivHex, err := hex.DecodeString(nc.EncryptionPrivateKey)
if err != nil {
return err
}
sigPubHex, err := hex.DecodeString(nc.SigningPublicKey)
if err != nil {
return err
}
sigPrivHex, err := hex.DecodeString(nc.SigningPrivateKey)
if err != nil {
return err
}
copy(boxPub[:], boxPubHex)
copy(boxPriv[:], boxPrivHex)
copy(sigPub[:], sigPubHex)
copy(sigPriv[:], sigPrivHex)
c.configMutex.Lock()
c.config = *nc
c.configOld = c.config
c.configMutex.Unlock()
c.init(&boxPub, &boxPriv, &sigPub, &sigPriv)
c.admin.init(c, nc.AdminListen)
c.init()
c.nodeinfo.init(c)
c.nodeinfo.setNodeInfo(nc.NodeInfo, nc.NodeInfoPrivacy)
if err := c.tcp.init(c, nc.Listen, nc.ReadTimeout); err != nil {
c.log.Println("Failed to start TCP interface")
if err := c.tcp.init(c); err != nil {
c.log.Errorln("Failed to start TCP interface")
return err
}
if err := c.awdl.init(c); err != nil {
c.log.Println("Failed to start AWDL interface")
c.log.Errorln("Failed to start AWDL interface")
return err
}
@ -143,72 +209,39 @@ func (c *Core) Start(nc *config.NodeConfig, log *log.Logger) error {
}
if err := c.switchTable.start(); err != nil {
c.log.Println("Failed to start switch")
c.log.Errorln("Failed to start switch")
return err
}
c.sessions.setSessionFirewallState(nc.SessionFirewall.Enable)
c.sessions.setSessionFirewallDefaults(
nc.SessionFirewall.AllowFromDirect,
nc.SessionFirewall.AllowFromRemote,
nc.SessionFirewall.AlwaysAllowOutbound,
)
c.sessions.setSessionFirewallWhitelist(nc.SessionFirewall.WhitelistEncryptionPublicKeys)
c.sessions.setSessionFirewallBlacklist(nc.SessionFirewall.BlacklistEncryptionPublicKeys)
if err := c.router.start(); err != nil {
c.log.Println("Failed to start router")
c.log.Errorln("Failed to start router")
return err
}
c.router.cryptokey.setEnabled(nc.TunnelRouting.Enable)
if c.router.cryptokey.isEnabled() {
c.log.Println("Crypto-key routing enabled")
for ipv6, pubkey := range nc.TunnelRouting.IPv6Destinations {
if err := c.router.cryptokey.addRoute(ipv6, pubkey); err != nil {
panic(err)
}
}
for _, source := range nc.TunnelRouting.IPv6Sources {
if c.router.cryptokey.addSourceSubnet(source); err != nil {
panic(err)
}
}
for ipv4, pubkey := range nc.TunnelRouting.IPv4Destinations {
if err := c.router.cryptokey.addRoute(ipv4, pubkey); err != nil {
panic(err)
}
}
for _, source := range nc.TunnelRouting.IPv4Sources {
if c.router.cryptokey.addSourceSubnet(source); err != nil {
panic(err)
}
}
}
if err := c.admin.start(); err != nil {
c.log.Println("Failed to start admin socket")
c.log.Errorln("Failed to start admin socket")
return err
}
if err := c.multicast.start(); err != nil {
c.log.Println("Failed to start multicast interface")
c.log.Errorln("Failed to start multicast interface")
return err
}
ip := net.IP(c.router.addr[:]).String()
if err := c.router.tun.start(nc.IfName, nc.IfTAPMode, fmt.Sprintf("%s/%d", ip, 8*len(address.GetPrefix())-1), nc.IfMTU); err != nil {
c.log.Println("Failed to start TUN/TAP")
if err := c.router.tun.start(); err != nil {
c.log.Errorln("Failed to start TUN/TAP")
return err
}
c.log.Println("Startup complete")
go c.addPeerLoop()
c.log.Infoln("Startup complete")
return nil
}
// Stops the Yggdrasil node.
func (c *Core) Stop() {
c.log.Println("Stopping...")
c.log.Infoln("Stopping...")
c.router.tun.close()
c.admin.close()
}
@ -250,12 +283,12 @@ func (c *Core) GetSubnet() *net.IPNet {
// Gets the nodeinfo.
func (c *Core) GetNodeInfo() nodeinfoPayload {
return c.nodeinfo.getNodeInfo()
return c.router.nodeinfo.getNodeInfo()
}
// Sets the nodeinfo.
func (c *Core) SetNodeInfo(nodeinfo interface{}, nodeinfoprivacy bool) {
c.nodeinfo.setNodeInfo(nodeinfo, nodeinfoprivacy)
c.router.nodeinfo.setNodeInfo(nodeinfo, nodeinfoprivacy)
}
// Sets the output logger of the Yggdrasil node after startup. This may be
@ -270,13 +303,6 @@ func (c *Core) AddPeer(addr string, sintf string) error {
return c.admin.addPeer(addr, sintf)
}
// Adds an expression to select multicast interfaces for peer discovery. This
// should be done before calling Start. This function can be called multiple
// times to add multiple search expressions.
func (c *Core) AddMulticastInterfaceExpr(expr *regexp.Regexp) {
c.ifceExpr = append(c.ifceExpr, expr)
}
// Adds an allowed public key. This allow peerings to be restricted only to
// keys that you have selected.
func (c *Core) AddAllowedEncryptionPublicKey(boxStr string) error {

40
src/yggdrasil/debug.go
View File

@ -14,15 +14,18 @@ import _ "golang.org/x/net/ipv6" // TODO put this somewhere better
import "fmt"
import "net"
import "log"
import "regexp"
import "encoding/hex"
import _ "net/http/pprof"
import "net/http"
import "runtime"
import "os"
import "github.com/gologme/log"
import "github.com/yggdrasil-network/yggdrasil-go/src/address"
import "github.com/yggdrasil-network/yggdrasil-go/src/config"
import "github.com/yggdrasil-network/yggdrasil-go/src/crypto"
import "github.com/yggdrasil-network/yggdrasil-go/src/defaults"
@ -52,7 +55,17 @@ func StartProfiler(log *log.Logger) error {
func (c *Core) Init() {
bpub, bpriv := crypto.NewBoxKeys()
spub, spriv := crypto.NewSigKeys()
c.init(bpub, bpriv, spub, spriv)
hbpub := hex.EncodeToString(bpub[:])
hbpriv := hex.EncodeToString(bpriv[:])
hspub := hex.EncodeToString(spub[:])
hspriv := hex.EncodeToString(spriv[:])
c.config = config.NodeConfig{
EncryptionPublicKey: hbpub,
EncryptionPrivateKey: hbpriv,
SigningPublicKey: hspub,
SigningPrivateKey: hspriv,
}
c.init( /*bpub, bpriv, spub, spriv*/ )
c.switchTable.start()
c.router.start()
}
@ -350,7 +363,7 @@ func (c *Core) DEBUG_init(bpub []byte,
bpriv []byte,
spub []byte,
spriv []byte) {
var boxPub crypto.BoxPubKey
/*var boxPub crypto.BoxPubKey
var boxPriv crypto.BoxPrivKey
var sigPub crypto.SigPubKey
var sigPriv crypto.SigPrivKey
@ -358,7 +371,18 @@ func (c *Core) DEBUG_init(bpub []byte,
copy(boxPriv[:], bpriv)
copy(sigPub[:], spub)
copy(sigPriv[:], spriv)
c.init(&boxPub, &boxPriv, &sigPub, &sigPriv)
c.init(&boxPub, &boxPriv, &sigPub, &sigPriv)*/
hbpub := hex.EncodeToString(bpub[:])
hbpriv := hex.EncodeToString(bpriv[:])
hspub := hex.EncodeToString(spub[:])
hspriv := hex.EncodeToString(spriv[:])
c.config = config.NodeConfig{
EncryptionPublicKey: hbpub,
EncryptionPrivateKey: hbpriv,
SigningPublicKey: hspub,
SigningPrivateKey: hspriv,
}
c.init( /*bpub, bpriv, spub, spriv*/ )
if err := c.router.start(); err != nil {
panic(err)
@ -427,7 +451,8 @@ func (c *Core) DEBUG_addSOCKSConn(socksaddr, peeraddr string) {
//*
func (c *Core) DEBUG_setupAndStartGlobalTCPInterface(addrport string) {
if err := c.tcp.init(c, addrport, 0); err != nil {
c.config.Listen = addrport
if err := c.tcp.init(c /*, addrport, 0*/); err != nil {
c.log.Println("Failed to start TCP interface:", err)
panic(err)
}
@ -474,7 +499,8 @@ func (c *Core) DEBUG_addKCPConn(saddr string) {
func (c *Core) DEBUG_setupAndStartAdminInterface(addrport string) {
a := admin{}
a.init(c, addrport)
c.config.AdminListen = addrport
a.init(c /*, addrport*/)
c.admin = a
}
@ -492,7 +518,7 @@ func (c *Core) DEBUG_setLogger(log *log.Logger) {
}
func (c *Core) DEBUG_setIfceExpr(expr *regexp.Regexp) {
c.ifceExpr = append(c.ifceExpr, expr)
c.log.Println("DEBUG_setIfceExpr no longer implemented")
}
func (c *Core) DEBUG_addAllowedEncryptionPublicKey(boxStr string) {

18
src/yggdrasil/dht.go
View File

@ -65,11 +65,12 @@ type dhtReqKey struct {
// The main DHT struct.
type dht struct {
core *Core
nodeID crypto.NodeID
peers chan *dhtInfo // other goroutines put incoming dht updates here
reqs map[dhtReqKey]time.Time // Keeps track of recent outstanding requests
callbacks map[dhtReqKey]dht_callbackInfo // Search and admin lookup callbacks
core *Core
reconfigure chan chan error
nodeID crypto.NodeID
peers chan *dhtInfo // other goroutines put incoming dht updates here
reqs map[dhtReqKey]time.Time // Keeps track of recent outstanding requests
callbacks map[dhtReqKey]dht_callbackInfo // Search and admin lookup callbacks
// These next two could be replaced by a single linked list or similar...
table map[crypto.NodeID]*dhtInfo
imp []*dhtInfo
@ -78,6 +79,13 @@ type dht struct {
// Initializes the DHT.
func (t *dht) init(c *Core) {
t.core = c
t.reconfigure = make(chan chan error, 1)
go func() {
for {
e := <-t.reconfigure
e <- nil
}
}()
t.nodeID = *t.core.GetNodeID()
t.peers = make(chan *dhtInfo, 1024)
t.callbacks = make(map[dhtReqKey]dht_callbackInfo)

2
src/yggdrasil/mobile.go
View File

@ -77,9 +77,7 @@ func (c *Core) StartJSON(configjson []byte) error {
return err
}
nc.IfName = "dummy"
//c.log.Println(nc.MulticastInterfaces)
for _, ll := range nc.MulticastInterfaces {
//c.log.Println("Processing MC", ll)
ifceExpr, err := regexp.Compile(ll)
if err != nil {
panic(err)

55
src/yggdrasil/multicast.go
View File

@ -4,33 +4,46 @@ import (
"context"
"fmt"
"net"
"regexp"
"sync"
"time"
"golang.org/x/net/ipv6"
)
type multicast struct {
core *Core
sock *ipv6.PacketConn
groupAddr string
core *Core
reconfigure chan chan error
sock *ipv6.PacketConn
groupAddr string
myAddr *net.TCPAddr
myAddrMutex sync.RWMutex
}
func (m *multicast) init(core *Core) {
m.core = core
m.reconfigure = make(chan chan error, 1)
go func() {
for {
e := <-m.reconfigure
m.myAddrMutex.Lock()
m.myAddr = m.core.tcp.getAddr()
m.myAddrMutex.Unlock()
e <- nil
}
}()
m.groupAddr = "[ff02::114]:9001"
// Check if we've been given any expressions
if len(m.core.ifceExpr) == 0 {
return
if count := len(m.interfaces()); count != 0 {
m.core.log.Infoln("Found", count, "multicast interface(s)")
}
// Ask the system for network interfaces
m.core.log.Println("Found", len(m.interfaces()), "multicast interface(s)")
}
func (m *multicast) start() error {
if len(m.core.ifceExpr) == 0 {
m.core.log.Println("Multicast discovery is disabled")
if len(m.interfaces()) == 0 {
m.core.log.Infoln("Multicast discovery is disabled")
} else {
m.core.log.Println("Multicast discovery is enabled")
m.core.log.Infoln("Multicast discovery is enabled")
addr, err := net.ResolveUDPAddr("udp", m.groupAddr)
if err != nil {
return err
@ -55,6 +68,10 @@ func (m *multicast) start() error {
}
func (m *multicast) interfaces() []net.Interface {
// Get interface expressions from config
m.core.configMutex.RLock()
exprs := m.core.config.MulticastInterfaces
m.core.configMutex.RUnlock()
// Ask the system for network interfaces
var interfaces []net.Interface
allifaces, err := net.Interfaces()
@ -75,8 +92,12 @@ func (m *multicast) interfaces() []net.Interface {
// Ignore point-to-point interfaces
continue
}
for _, expr := range m.core.ifceExpr {
if expr.MatchString(iface.Name) {
for _, expr := range exprs {
e, err := regexp.Compile(expr)
if err != nil {
panic(err)
}
if e.MatchString(iface.Name) {
interfaces = append(interfaces, iface)
}
}
@ -85,13 +106,14 @@ func (m *multicast) interfaces() []net.Interface {
}
func (m *multicast) announce() {
var anAddr net.TCPAddr
m.myAddrMutex.Lock()
m.myAddr = m.core.tcp.getAddr()
m.myAddrMutex.Unlock()
groupAddr, err := net.ResolveUDPAddr("udp6", m.groupAddr)
if err != nil {
panic(err)
}
var anAddr net.TCPAddr
myAddr := m.core.tcp.getAddr()
anAddr.Port = myAddr.Port
destAddr, err := net.ResolveUDPAddr("udp6", m.groupAddr)
if err != nil {
panic(err)
@ -103,6 +125,9 @@ func (m *multicast) announce() {
if err != nil {
panic(err)
}
m.myAddrMutex.RLock()
anAddr.Port = m.myAddr.Port
m.myAddrMutex.RUnlock()
for _, addr := range addrs {
addrIP, _, _ := net.ParseCIDR(addr.String())
if addrIP.To4() != nil {

2
src/yggdrasil/nodeinfo.go
View File

@ -170,7 +170,7 @@ func (m *nodeinfo) sendNodeInfo(key crypto.BoxPubKey, coords []byte, isResponse
nodeinfo := nodeinfoReqRes{
SendCoords: table.self.getCoords(),
IsResponse: isResponse,
NodeInfo: m.core.nodeinfo.getNodeInfo(),
NodeInfo: m.getNodeInfo(),
}
bs := nodeinfo.encode()
shared := m.core.sessions.getSharedKey(&m.core.boxPriv, &key)

75
src/yggdrasil/peer.go
View File

@ -5,6 +5,7 @@ package yggdrasil
// Live code should be better commented
import (
"encoding/hex"
"sync"
"sync/atomic"
"time"
@ -14,15 +15,14 @@ import (
)
// The peers struct represents peers with an active connection.
// Incomping packets are passed to the corresponding peer, which handles them somehow.
// Incoming packets are passed to the corresponding peer, which handles them somehow.
// In most cases, this involves passing the packet to the handler for outgoing traffic to another peer.
// In other cases, it's link protocol traffic used to build the spanning tree, in which case this checks signatures and passes the message along to the switch.
type peers struct {
core *Core
mutex sync.Mutex // Synchronize writes to atomic
ports atomic.Value //map[switchPort]*peer, use CoW semantics
authMutex sync.RWMutex
allowedEncryptionPublicKeys map[crypto.BoxPubKey]struct{}
core *Core
reconfigure chan chan error
mutex sync.Mutex // Synchronize writes to atomic
ports atomic.Value //map[switchPort]*peer, use CoW semantics
}
// Initializes the peers struct.
@ -31,40 +31,55 @@ func (ps *peers) init(c *Core) {
defer ps.mutex.Unlock()
ps.putPorts(make(map[switchPort]*peer))
ps.core = c
ps.allowedEncryptionPublicKeys = make(map[crypto.BoxPubKey]struct{})
ps.reconfigure = make(chan chan error, 1)
go func() {
for {
e := <-ps.reconfigure
e <- nil
}
}()
}
// Returns true if an incoming peer connection to a key is allowed, either because the key is in the whitelist or because the whitelist is empty.
// Returns true if an incoming peer connection to a key is allowed, either
// because the key is in the whitelist or because the whitelist is empty.
func (ps *peers) isAllowedEncryptionPublicKey(box *crypto.BoxPubKey) bool {
ps.authMutex.RLock()
defer ps.authMutex.RUnlock()
_, isIn := ps.allowedEncryptionPublicKeys[*box]
return isIn || len(ps.allowedEncryptionPublicKeys) == 0
boxstr := hex.EncodeToString(box[:])
ps.core.configMutex.RLock()
defer ps.core.configMutex.RUnlock()
for _, v := range ps.core.config.AllowedEncryptionPublicKeys {
if v == boxstr {
return true
}
}
return len(ps.core.config.AllowedEncryptionPublicKeys) == 0
}
// Adds a key to the whitelist.
func (ps *peers) addAllowedEncryptionPublicKey(box *crypto.BoxPubKey) {
ps.authMutex.Lock()
defer ps.authMutex.Unlock()
ps.allowedEncryptionPublicKeys[*box] = struct{}{}
func (ps *peers) addAllowedEncryptionPublicKey(box string) {
ps.core.configMutex.RLock()
defer ps.core.configMutex.RUnlock()
ps.core.config.AllowedEncryptionPublicKeys =
append(ps.core.config.AllowedEncryptionPublicKeys, box)
}
// Removes a key from the whitelist.
func (ps *peers) removeAllowedEncryptionPublicKey(box *crypto.BoxPubKey) {
ps.authMutex.Lock()
defer ps.authMutex.Unlock()
delete(ps.allowedEncryptionPublicKeys, *box)
func (ps *peers) removeAllowedEncryptionPublicKey(box string) {
ps.core.configMutex.RLock()
defer ps.core.configMutex.RUnlock()
for k, v := range ps.core.config.AllowedEncryptionPublicKeys {
if v == box {
ps.core.config.AllowedEncryptionPublicKeys =
append(ps.core.config.AllowedEncryptionPublicKeys[:k],
ps.core.config.AllowedEncryptionPublicKeys[k+1:]...)
}
}
}
// Gets the whitelist of allowed keys for incoming connections.
func (ps *peers) getAllowedEncryptionPublicKeys() []crypto.BoxPubKey {
ps.authMutex.RLock()
defer ps.authMutex.RUnlock()
keys := make([]crypto.BoxPubKey, 0, len(ps.allowedEncryptionPublicKeys))
for key := range ps.allowedEncryptionPublicKeys {
keys = append(keys, key)
}
return keys
func (ps *peers) getAllowedEncryptionPublicKeys() []string {
ps.core.configMutex.RLock()
defer ps.core.configMutex.RUnlock()
return ps.core.config.AllowedEncryptionPublicKeys
}
// Atomically gets a map[switchPort]*peer of known peers.
@ -97,7 +112,7 @@ type peer struct {
close func() // Called when a peer is removed, to close the underlying connection, or via admin api
}
// Creates a new peer with the specified box, sig, and linkShared keys, using the lowest unocupied port number.
// Creates a new peer with the specified box, sig, and linkShared keys, using the lowest unoccupied port number.
func (ps *peers) newPeer(box *crypto.BoxPubKey, sig *crypto.SigPubKey, linkShared *crypto.BoxSharedKey, endpoint string) *peer {
now := time.Now()
p := peer{box: *box,
@ -342,7 +357,7 @@ func (p *peer) handleSwitchMsg(packet []byte) {
}
// This generates the bytes that we sign or check the signature of for a switchMsg.
// It begins with the next node's key, followed by the root and the timetsamp, followed by coords being advertised to the next node.
// It begins with the next node's key, followed by the root and the timestamp, followed by coords being advertised to the next node.
func getBytesForSig(next *crypto.SigPubKey, msg *switchMsg) []byte {
var loc switchLocator
for _, hop := range msg.Hops {

41
src/yggdrasil/router.go
View File

@ -37,19 +37,21 @@ import (
// The router struct has channels to/from the tun/tap device and a self peer (0), which is how messages are passed between this node and the peers/switch layer.
// The router's mainLoop goroutine is responsible for managing all information related to the dht, searches, and crypto sessions.
type router struct {
core *Core
addr address.Address
subnet address.Subnet
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()
tun tunAdapter // TUN/TAP adapter
adapters []Adapter // Other adapters
recv chan<- []byte // place where the tun pulls received packets from
send <-chan []byte // place where the tun puts outgoing packets
reset chan struct{} // signal that coords changed (re-init sessions/dht)
admin chan func() // pass a lambda for the admin socket to query stuff
cryptokey cryptokey
core *Core
reconfigure chan chan error
addr address.Address
subnet address.Subnet
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()
tun tunAdapter // TUN/TAP adapter
adapters []Adapter // Other adapters
recv chan<- []byte // place where the tun pulls received packets from
send <-chan []byte // place where the tun puts outgoing packets
reset chan struct{} // signal that coords changed (re-init sessions/dht)
admin chan func() // pass a lambda for the admin socket to query stuff
cryptokey cryptokey
nodeinfo nodeinfo
}
// Packet and session info, used to check that the packet matches a valid IP range or CKR prefix before sending to the tun.
@ -61,6 +63,7 @@ type router_recvPacket struct {
// Initializes the router struct, which includes setting up channels to/from the tun/tap.
func (r *router) init(core *Core) {
r.core = core
r.reconfigure = make(chan chan error, 1)
r.addr = *address.AddrForNodeID(&r.core.dht.nodeID)
r.subnet = *address.SubnetForNodeID(&r.core.dht.nodeID)
in := make(chan []byte, 32) // TODO something better than this...
@ -83,13 +86,17 @@ func (r *router) init(core *Core) {
r.send = send
r.reset = make(chan struct{}, 1)
r.admin = make(chan func(), 32)
r.nodeinfo.init(r.core)
r.core.configMutex.RLock()
r.nodeinfo.setNodeInfo(r.core.config.NodeInfo, r.core.config.NodeInfoPrivacy)
r.core.configMutex.RUnlock()
r.cryptokey.init(r.core)
r.tun.init(r.core, send, recv)
}
// Starts the mainLoop goroutine.
func (r *router) start() error {
r.core.log.Println("Starting router")
r.core.log.Infoln("Starting router")
go r.mainLoop()
return nil
}
@ -124,6 +131,10 @@ func (r *router) mainLoop() {
}
case f := <-r.admin:
f()
case e := <-r.reconfigure:
r.core.configMutex.RLock()
e <- r.nodeinfo.setNodeInfo(r.core.config.NodeInfo, r.core.config.NodeInfoPrivacy)
r.core.configMutex.RUnlock()
}
}
}
@ -463,7 +474,7 @@ func (r *router) handleNodeInfo(bs []byte, fromKey *crypto.BoxPubKey) {
return
}
req.SendPermPub = *fromKey
r.core.nodeinfo.handleNodeInfo(&req)
r.nodeinfo.handleNodeInfo(&req)
}
// Passed a function to call.

14
src/yggdrasil/search.go
View File

@ -30,7 +30,7 @@ const search_MAX_SEARCH_SIZE = 16
const search_RETRY_TIME = time.Second
// Information about an ongoing search.
// Includes the targed NodeID, the bitmask to match it to an IP, and the list of nodes to visit / already visited.
// Includes the target NodeID, the bitmask to match it to an IP, and the list of nodes to visit / already visited.
type searchInfo struct {
dest crypto.NodeID
mask crypto.NodeID
@ -42,13 +42,21 @@ type searchInfo struct {
// This stores a map of active searches.
type searches struct {
core *Core
searches map[crypto.NodeID]*searchInfo
core *Core
reconfigure chan chan error
searches map[crypto.NodeID]*searchInfo
}
// Intializes the searches struct.
func (s *searches) init(core *Core) {
s.core = core
s.reconfigure = make(chan chan error, 1)
go func() {
for {
e := <-s.reconfigure
e <- nil
}
}()
s.searches = make(map[crypto.NodeID]*searchInfo)
}

116
src/yggdrasil/session.go
View File

@ -18,6 +18,7 @@ import (
// This includes coords, permanent and ephemeral keys, handles and nonces, various sorts of timing information for timeout and maintenance, and some metadata for the admin API.
type sessionInfo struct {
core *Core
reconfigure chan chan error
theirAddr address.Address
theirSubnet address.Subnet
theirPermPub crypto.BoxPubKey
@ -101,6 +102,7 @@ func (s *sessionInfo) timedout() bool {
// Additionally, stores maps of address/subnet onto keys, and keys onto handles.
type sessions struct {
core *Core
reconfigure chan chan error
lastCleanup time.Time
// Maps known permanent keys to their shared key, used by DHT a lot
permShared map[crypto.BoxPubKey]*crypto.BoxSharedKey
@ -112,18 +114,29 @@ type sessions struct {
byTheirPerm map[crypto.BoxPubKey]*crypto.Handle
addrToPerm map[address.Address]*crypto.BoxPubKey
subnetToPerm map[address.Subnet]*crypto.BoxPubKey
// Options from the session firewall
sessionFirewallEnabled bool
sessionFirewallAllowsDirect bool
sessionFirewallAllowsRemote bool
sessionFirewallAlwaysAllowsOutbound bool
sessionFirewallWhitelist []string
sessionFirewallBlacklist []string
}
// Initializes the session struct.
func (ss *sessions) init(core *Core) {
ss.core = core
ss.reconfigure = make(chan chan error, 1)
go func() {
for {
e := <-ss.reconfigure
responses := make(map[crypto.Handle]chan error)
for index, session := range ss.sinfos {
responses[index] = make(chan error)
session.reconfigure <- responses[index]
}
for _, response := range responses {
if err := <-response; err != nil {
e <- err
continue
}
}
e <- nil
}
}()
ss.permShared = make(map[crypto.BoxPubKey]*crypto.BoxSharedKey)
ss.sinfos = make(map[crypto.Handle]*sessionInfo)
ss.byMySes = make(map[crypto.BoxPubKey]*crypto.Handle)
@ -133,40 +146,28 @@ func (ss *sessions) init(core *Core) {
ss.lastCleanup = time.Now()
}
// Enable or disable the session firewall
func (ss *sessions) setSessionFirewallState(enabled bool) {
ss.sessionFirewallEnabled = enabled
}
// Determines whether the session firewall is enabled.
func (ss *sessions) isSessionFirewallEnabled() bool {
ss.core.configMutex.RLock()
defer ss.core.configMutex.RUnlock()
// Set the session firewall defaults (first parameter is whether to allow
// sessions from direct peers, second is whether to allow from remote nodes).
func (ss *sessions) setSessionFirewallDefaults(allowsDirect bool, allowsRemote bool, alwaysAllowsOutbound bool) {
ss.sessionFirewallAllowsDirect = allowsDirect
ss.sessionFirewallAllowsRemote = allowsRemote
ss.sessionFirewallAlwaysAllowsOutbound = alwaysAllowsOutbound
}
// Set the session firewall whitelist - nodes always allowed to open sessions.
func (ss *sessions) setSessionFirewallWhitelist(whitelist []string) {
ss.sessionFirewallWhitelist = whitelist
}
// Set the session firewall blacklist - nodes never allowed to open sessions.
func (ss *sessions) setSessionFirewallBlacklist(blacklist []string) {
ss.sessionFirewallBlacklist = blacklist
return ss.core.config.SessionFirewall.Enable
}
// Determines whether the session with a given publickey is allowed based on
// session firewall rules.
func (ss *sessions) isSessionAllowed(pubkey *crypto.BoxPubKey, initiator bool) bool {
ss.core.configMutex.RLock()
defer ss.core.configMutex.RUnlock()
// Allow by default if the session firewall is disabled
if !ss.sessionFirewallEnabled {
if !ss.isSessionFirewallEnabled() {
return true
}
// Prepare for checking whitelist/blacklist
var box crypto.BoxPubKey
// Reject blacklisted nodes
for _, b := range ss.sessionFirewallBlacklist {
for _, b := range ss.core.config.SessionFirewall.BlacklistEncryptionPublicKeys {
key, err := hex.DecodeString(b)
if err == nil {
copy(box[:crypto.BoxPubKeyLen], key)
@ -176,7 +177,7 @@ func (ss *sessions) isSessionAllowed(pubkey *crypto.BoxPubKey, initiator bool) b
}
}
// Allow whitelisted nodes
for _, b := range ss.sessionFirewallWhitelist {
for _, b := range ss.core.config.SessionFirewall.WhitelistEncryptionPublicKeys {
key, err := hex.DecodeString(b)
if err == nil {
copy(box[:crypto.BoxPubKeyLen], key)
@ -186,7 +187,7 @@ func (ss *sessions) isSessionAllowed(pubkey *crypto.BoxPubKey, initiator bool) b
}
}
// Allow outbound sessions if appropriate
if ss.sessionFirewallAlwaysAllowsOutbound {
if ss.core.config.SessionFirewall.AlwaysAllowOutbound {
if initiator {
return true
}
@ -200,11 +201,11 @@ func (ss *sessions) isSessionAllowed(pubkey *crypto.BoxPubKey, initiator bool) b
}
}
// Allow direct peers if appropriate
if ss.sessionFirewallAllowsDirect && isDirectPeer {
if ss.core.config.SessionFirewall.AllowFromDirect && isDirectPeer {
return true
}
// Allow remote nodes if appropriate
if ss.sessionFirewallAllowsRemote && !isDirectPeer {
if ss.core.config.SessionFirewall.AllowFromRemote && !isDirectPeer {
return true
}
// Finally, default-deny if not matching any of the above rules
@ -264,13 +265,12 @@ func (ss *sessions) getByTheirSubnet(snet *address.Subnet) (*sessionInfo, bool)
// Creates a new session and lazily cleans up old/timedout existing sessions.
// This includse initializing session info to sane defaults (e.g. lowest supported MTU).
func (ss *sessions) createSession(theirPermKey *crypto.BoxPubKey) *sessionInfo {
if ss.sessionFirewallEnabled {
if !ss.isSessionAllowed(theirPermKey, true) {
return nil
}
if !ss.isSessionAllowed(theirPermKey, true) {
return nil
}
sinfo := sessionInfo{}
sinfo.core = ss.core
sinfo.reconfigure = make(chan chan error, 1)
sinfo.theirPermPub = *theirPermKey
pub, priv := crypto.NewBoxKeys()
sinfo.mySesPub = *pub
@ -442,7 +442,7 @@ func (ss *sessions) handlePing(ping *sessionPing) {
// Get the corresponding session (or create a new session)
sinfo, isIn := ss.getByTheirPerm(&ping.SendPermPub)
// Check the session firewall
if !isIn && ss.sessionFirewallEnabled {
if !isIn && ss.isSessionFirewallEnabled() {
if !ss.isSessionAllowed(&ping.SendPermPub, false) {
return
}
@ -539,6 +539,8 @@ func (sinfo *sessionInfo) doWorker() {
} else {
return
}
case e := <-sinfo.reconfigure:
e <- nil
}
}
}
@ -552,17 +554,30 @@ func (sinfo *sessionInfo) doSend(bs []byte) {
}
// code isn't multithreaded so appending to this is safe
coords := sinfo.coords
// Read IPv6 flowlabel field (20 bits).
// Assumes packet at least contains IPv6 header.
flowkey := uint64(bs[1]&0x0f)<<16 | uint64(bs[2])<<8 | uint64(bs[3])
// Check if the flowlabel was specified
if flowkey == 0 {
// Does the packet meet the minimum UDP packet size? (others are bigger)
if len(bs) >= 48 {
// Is the protocol TCP, UDP, SCTP?
// Work out the flowkey - this is used to determine which switch queue
// traffic will be pushed to in the event of congestion
var flowkey uint64
// Get the IP protocol version from the packet
switch bs[0] & 0xf0 {
case 0x40: // IPv4 packet
// Check the packet meets minimum UDP packet length
if len(bs) >= 24 {
// Is the protocol TCP, UDP or SCTP?
if bs[9] == 0x06 || bs[9] == 0x11 || bs[9] == 0x84 {
ihl := bs[0] & 0x0f * 4 // Header length
flowkey = uint64(bs[9])<<32 /* proto */ |
uint64(bs[ihl+0])<<24 | uint64(bs[ihl+1])<<16 /* sport */ |
uint64(bs[ihl+2])<<8 | uint64(bs[ihl+3]) /* dport */
}
}
case 0x60: // IPv6 packet
// Check if the flowlabel was specified in the packet header
flowkey = uint64(bs[1]&0x0f)<<16 | uint64(bs[2])<<8 | uint64(bs[3])
// If the flowlabel isn't present, make protokey from proto | sport | dport
// if the packet meets minimum UDP packet length
if flowkey == 0 && len(bs) >= 48 {
// Is the protocol TCP, UDP or SCTP?
if bs[6] == 0x06 || bs[6] == 0x11 || bs[6] == 0x84 {
// if flowlabel was unspecified (0), try to use known protocols' ports
// protokey: proto | sport | dport
flowkey = uint64(bs[6])<<32 /* proto */ |
uint64(bs[40])<<24 | uint64(bs[41])<<16 /* sport */ |
uint64(bs[42])<<8 | uint64(bs[43]) /* dport */
@ -610,5 +625,8 @@ func (sinfo *sessionInfo) doRecv(p *wire_trafficPacket) {
sinfo.updateNonce(&p.Nonce)
sinfo.time = time.Now()
sinfo.bytesRecvd += uint64(len(bs))
sinfo.core.router.toRecv <- router_recvPacket{bs, sinfo}
select {
case sinfo.core.router.toRecv <- router_recvPacket{bs, sinfo}:
default: // avoid deadlocks, maybe do this somewhere else?...
}
}

16
src/yggdrasil/switch.go
View File

@ -4,7 +4,7 @@ package yggdrasil
// It routes packets based on distance on the spanning tree
// In general, this is *not* equivalent to routing on the tree
// It falls back to the tree in the worst case, but it can take shortcuts too
// This is the part that makse routing reasonably efficient on scale-free graphs
// This is the part that makes routing reasonably efficient on scale-free graphs
// TODO document/comment everything in a lot more detail
@ -162,6 +162,7 @@ type switchData struct {
// All the information stored by the switch.
type switchTable struct {
core *Core
reconfigure chan chan error
key crypto.SigPubKey // Our own key
time time.Time // Time when locator.tstamp was last updated
drop map[crypto.SigPubKey]int64 // Tstamp associated with a dropped root
@ -181,11 +182,14 @@ type switchTable struct {
const SwitchQueueTotalMinSize = 4 * 1024 * 1024
// Initializes the switchTable struct.
func (t *switchTable) init(core *Core, key crypto.SigPubKey) {
func (t *switchTable) init(core *Core) {
now := time.Now()
t.core = core
t.key = key
locator := switchLocator{root: key, tstamp: now.Unix()}
t.reconfigure = make(chan chan error, 1)
t.core.configMutex.RLock()
t.key = t.core.sigPub
t.core.configMutex.RUnlock()
locator := switchLocator{root: t.key, tstamp: now.Unix()}
peers := make(map[switchPort]peerInfo)
t.data = switchData{locator: locator, peers: peers}
t.updater.Store(&sync.Once{})
@ -559,7 +563,7 @@ func (t *switchTable) getTable() lookupTable {
// Starts the switch worker
func (t *switchTable) start() error {
t.core.log.Println("Starting switch")
t.core.log.Infoln("Starting switch")
go t.doWorker()
return nil
}
@ -808,6 +812,8 @@ func (t *switchTable) doWorker() {
}
case f := <-t.admin:
f()
case e := <-t.reconfigure:
e <- nil
}
}
}

195
src/yggdrasil/tcp.go
View File

@ -39,8 +39,11 @@ const tcp_ping_interval = (default_tcp_timeout * 2 / 3)
// The TCP listener and information about active TCP connections, to avoid duplication.
type tcpInterface struct {
core *Core
reconfigure chan chan error
serv net.Listener
serv_stop chan bool
tcp_timeout time.Duration
tcp_addr string
mutex sync.Mutex // Protecting the below
calls map[string]struct{}
conns map[tcpInfo](chan struct{})
@ -81,10 +84,37 @@ func (iface *tcpInterface) connectSOCKS(socksaddr, peeraddr string) {
}
// Initializes the struct.
func (iface *tcpInterface) init(core *Core, addr string, readTimeout int32) (err error) {
func (iface *tcpInterface) init(core *Core) (err error) {
iface.core = core
iface.serv_stop = make(chan bool, 1)
iface.reconfigure = make(chan chan error, 1)
go func() {
for {
e := <-iface.reconfigure
iface.core.configMutex.RLock()
updated := iface.core.config.Listen != iface.core.configOld.Listen
iface.core.configMutex.RUnlock()
if updated {
iface.serv_stop <- true
iface.serv.Close()
e <- iface.listen()
} else {
e <- nil
}
}
}()
return iface.listen()
}
func (iface *tcpInterface) listen() error {
var err error
iface.core.configMutex.RLock()
iface.tcp_addr = iface.core.config.Listen
iface.tcp_timeout = time.Duration(iface.core.config.ReadTimeout) * time.Millisecond
iface.core.configMutex.RUnlock()
iface.tcp_timeout = time.Duration(readTimeout) * time.Millisecond
if iface.tcp_timeout >= 0 && iface.tcp_timeout < default_tcp_timeout {
iface.tcp_timeout = default_tcp_timeout
}
@ -93,11 +123,14 @@ func (iface *tcpInterface) init(core *Core, addr string, readTimeout int32) (err
lc := net.ListenConfig{
Control: iface.tcpContext,
}
iface.serv, err = lc.Listen(ctx, "tcp", addr)
iface.serv, err = lc.Listen(ctx, "tcp", iface.tcp_addr)
if err == nil {
iface.mutex.Lock()
iface.calls = make(map[string]struct{})
iface.conns = make(map[tcpInfo](chan struct{}))
iface.mutex.Unlock()
go iface.listener()
return nil
}
return err
@ -106,16 +139,42 @@ func (iface *tcpInterface) init(core *Core, addr string, readTimeout int32) (err
// Runs the listener, which spawns off goroutines for incoming connections.
func (iface *tcpInterface) listener() {
defer iface.serv.Close()
iface.core.log.Println("Listening for TCP on:", iface.serv.Addr().String())
iface.core.log.Infoln("Listening for TCP on:", iface.serv.Addr().String())
for {
sock, err := iface.serv.Accept()
if err != nil {
panic(err)
iface.core.log.Errorln("Failed to accept connection:", err)
return
}
select {
case <-iface.serv_stop:
iface.core.log.Errorln("Stopping listener")
return
default:
if err != nil {
panic(err)
}
go iface.handler(sock, true)
}
go iface.handler(sock, true)
}
}
// Checks if we already have a connection to this node
func (iface *tcpInterface) isAlreadyConnected(info tcpInfo) bool {
iface.mutex.Lock()
defer iface.mutex.Unlock()
_, isIn := iface.conns[info]
return isIn
}
// Checks if we already are calling this address
func (iface *tcpInterface) isAlreadyCalling(saddr string) bool {
iface.mutex.Lock()
defer iface.mutex.Unlock()
_, isIn := iface.calls[saddr]
return isIn
}
// Checks if a connection already exists.
// If not, it adds it to the list of active outgoing calls (to block future attempts) and dials the address.
// If the dial is successful, it launches the handler.
@ -127,25 +186,20 @@ func (iface *tcpInterface) call(saddr string, socksaddr *string, sintf string) {
if sintf != "" {
callname = fmt.Sprintf("%s/%s", saddr, sintf)
}
quit := false
iface.mutex.Lock()
if _, isIn := iface.calls[callname]; isIn {
quit = true
} else {
iface.calls[callname] = struct{}{}
defer func() {
// Block new calls for a little while, to mitigate livelock scenarios
time.Sleep(default_tcp_timeout)
time.Sleep(time.Duration(rand.Intn(1000)) * time.Millisecond)
iface.mutex.Lock()
delete(iface.calls, callname)
iface.mutex.Unlock()
}()
}
iface.mutex.Unlock()
if quit {
if iface.isAlreadyCalling(saddr) {
return
}
iface.mutex.Lock()
iface.calls[callname] = struct{}{}
iface.mutex.Unlock()
defer func() {
// Block new calls for a little while, to mitigate livelock scenarios
time.Sleep(default_tcp_timeout)
time.Sleep(time.Duration(rand.Intn(1000)) * time.Millisecond)
iface.mutex.Lock()
delete(iface.calls, callname)
iface.mutex.Unlock()
}()
var conn net.Conn
var err error
if socksaddr != nil {
@ -176,35 +230,50 @@ func (iface *tcpInterface) call(saddr string, socksaddr *string, sintf string) {
ief, err := net.InterfaceByName(sintf)
if err != nil {
return
} else {
if ief.Flags&net.FlagUp == 0 {
}
if ief.Flags&net.FlagUp == 0 {
return
}
addrs, err := ief.Addrs()
if err == nil {
dst, err := net.ResolveTCPAddr("tcp", saddr)
if err != nil {
return
}
addrs, err := ief.Addrs()
if err == nil {
dst, err := net.ResolveTCPAddr("tcp", saddr)
for addrindex, addr := range addrs {
src, _, err := net.ParseCIDR(addr.String())
if err != nil {
return
continue
}
for _, addr := range addrs {
src, _, err := net.ParseCIDR(addr.String())
if err != nil {
continue
}
if (src.To4() != nil) == (dst.IP.To4() != nil) && src.IsGlobalUnicast() {
dialer.LocalAddr = &net.TCPAddr{
IP: src,
Port: 0,
}
break
if src.Equal(dst.IP) {
continue
}
if !src.IsGlobalUnicast() && !src.IsLinkLocalUnicast() {
continue
}
bothglobal := src.IsGlobalUnicast() == dst.IP.IsGlobalUnicast()
bothlinklocal := src.IsLinkLocalUnicast() == dst.IP.IsLinkLocalUnicast()
if !bothglobal && !bothlinklocal {
continue
}
if (src.To4() != nil) != (dst.IP.To4() != nil) {
continue
}
if bothglobal || bothlinklocal || addrindex == len(addrs)-1 {
dialer.LocalAddr = &net.TCPAddr{
IP: src,
Port: 0,
Zone: sintf,
}
break
}
if dialer.LocalAddr == nil {
return
}
}
if dialer.LocalAddr == nil {
return
}
}
}
conn, err = dialer.Dial("tcp", saddr)
if err != nil {
return
@ -244,17 +313,27 @@ func (iface *tcpInterface) handler(sock net.Conn, incoming bool) {
base := version_getBaseMetadata()
if meta.meta == base.meta {
if meta.ver > base.ver {
iface.core.log.Println("Failed to connect to node:", sock.RemoteAddr().String(), "version:", meta.ver)
iface.core.log.Errorln("Failed to connect to node:", sock.RemoteAddr().String(), "version:", meta.ver)
} else if meta.ver == base.ver && meta.minorVer > base.minorVer {
iface.core.log.Println("Failed to connect to node:", sock.RemoteAddr().String(), "version:", fmt.Sprintf("%d.%d", meta.ver, meta.minorVer))
iface.core.log.Errorln("Failed to connect to node:", sock.RemoteAddr().String(), "version:", fmt.Sprintf("%d.%d", meta.ver, meta.minorVer))
}
}
// TODO? Block forever to prevent future connection attempts? suppress future messages about the same node?
return
}
remoteAddr, _, e1 := net.SplitHostPort(sock.RemoteAddr().String())
localAddr, _, e2 := net.SplitHostPort(sock.LocalAddr().String())
if e1 != nil || e2 != nil {
return
}
info := tcpInfo{ // used as a map key, so don't include ephemeral link key
box: meta.box,
sig: meta.sig,
box: meta.box,
sig: meta.sig,
localAddr: localAddr,
remoteAddr: remoteAddr,
}
if iface.isAlreadyConnected(info) {
return
}
// Quit the parent call if this is a connection to ourself
equiv := func(k1, k2 []byte) bool {
@ -265,14 +344,14 @@ func (iface *tcpInterface) handler(sock net.Conn, incoming bool) {
}
return true
}
if equiv(info.box[:], iface.core.boxPub[:]) {
if equiv(meta.box[:], iface.core.boxPub[:]) {
return
}
if equiv(info.sig[:], iface.core.sigPub[:]) {
if equiv(meta.sig[:], iface.core.sigPub[:]) {
return
}
// Check if we're authorized to connect to this key / IP
if incoming && !iface.core.peers.isAllowedEncryptionPublicKey(&info.box) {
if incoming && !iface.core.peers.isAllowedEncryptionPublicKey(&meta.box) {
// Allow unauthorized peers if they're link-local
raddrStr, _, _ := net.SplitHostPort(sock.RemoteAddr().String())
raddr := net.ParseIP(raddrStr)
@ -281,15 +360,13 @@ func (iface *tcpInterface) handler(sock net.Conn, incoming bool) {
}
}
// Check if we already have a connection to this node, close and block if yes
info.localAddr, _, _ = net.SplitHostPort(sock.LocalAddr().String())
info.remoteAddr, _, _ = net.SplitHostPort(sock.RemoteAddr().String())
iface.mutex.Lock()
if blockChan, isIn := iface.conns[info]; isIn {
/*if blockChan, isIn := iface.conns[info]; isIn {
iface.mutex.Unlock()
sock.Close()
<-blockChan
return
}
}*/
blockChan := make(chan struct{})
iface.conns[info] = blockChan
iface.mutex.Unlock()
@ -301,7 +378,7 @@ func (iface *tcpInterface) handler(sock net.Conn, incoming bool) {
}()
// Note that multiple connections to the same node are allowed
// E.g. over different interfaces
p := iface.core.peers.newPeer(&info.box, &info.sig, crypto.GetSharedKey(myLinkPriv, &meta.link), sock.RemoteAddr().String())
p := iface.core.peers.newPeer(&meta.box, &meta.sig, crypto.GetSharedKey(myLinkPriv, &meta.link), sock.RemoteAddr().String())
p.linkOut = make(chan []byte, 1)
in := func(bs []byte) {
p.handlePacket(bs)
@ -363,16 +440,16 @@ func (iface *tcpInterface) handler(sock net.Conn, incoming bool) {
}()
us, _, _ := net.SplitHostPort(sock.LocalAddr().String())
them, _, _ := net.SplitHostPort(sock.RemoteAddr().String())
themNodeID := crypto.GetNodeID(&info.box)
themNodeID := crypto.GetNodeID(&meta.box)
themAddr := address.AddrForNodeID(themNodeID)
themAddrString := net.IP(themAddr[:]).String()
themString := fmt.Sprintf("%s@%s", themAddrString, them)
iface.core.log.Println("Connected:", themString, "source", us)
iface.core.log.Infof("Connected: %s, source: %s", themString, us)
err = iface.reader(sock, in) // In this goroutine, because of defers
if err == nil {
iface.core.log.Println("Disconnected:", themString, "source", us)
iface.core.log.Infof("Disconnected: %s, source: %s", themString, us)
} else {
iface.core.log.Println("Disconnected:", themString, "source", us, "with error:", err)
iface.core.log.Infof("Disconnected: %s, source: %s, error: %s", themString, us, err)
}
return
}

30
src/yggdrasil/tun.go
View File

@ -5,6 +5,8 @@ package yggdrasil
import (
"bytes"
"errors"
"fmt"
"net"
"sync"
"time"
@ -42,11 +44,33 @@ func getSupportedMTU(mtu int) int {
func (tun *tunAdapter) init(core *Core, send chan<- []byte, recv <-chan []byte) {
tun.Adapter.init(core, send, recv)
tun.icmpv6.init(tun)
go func() {
for {
e := <-tun.reconfigure
tun.core.configMutex.RLock()
updated := tun.core.config.IfName != tun.core.configOld.IfName ||
tun.core.config.IfTAPMode != tun.core.configOld.IfTAPMode ||
tun.core.config.IfMTU != tun.core.configOld.IfMTU
tun.core.configMutex.RUnlock()
if updated {
tun.core.log.Warnln("Reconfiguring TUN/TAP is not supported yet")
e <- nil
} else {
e <- nil
}
}
}()
}
// Starts the setup process for the TUN/TAP adapter, and if successful, starts
// the read/write goroutines to handle packets on that interface.
func (tun *tunAdapter) start(ifname string, iftapmode bool, addr string, mtu int) error {
func (tun *tunAdapter) start() error {
tun.core.configMutex.RLock()
ifname := tun.core.config.IfName
iftapmode := tun.core.config.IfTAPMode
addr := fmt.Sprintf("%s/%d", net.IP(tun.core.router.addr[:]).String(), 8*len(address.GetPrefix())-1)
mtu := tun.core.config.IfMTU
tun.core.configMutex.RUnlock()
if ifname != "none" {
if err := tun.setup(ifname, iftapmode, addr, mtu); err != nil {
return err
@ -58,8 +82,8 @@ func (tun *tunAdapter) start(ifname string, iftapmode bool, addr string, mtu int
tun.mutex.Lock()
tun.isOpen = true
tun.mutex.Unlock()
go func() { tun.core.log.Println("WARNING: tun.read() exited with error:", tun.read()) }()
go func() { tun.core.log.Println("WARNING: tun.write() exited with error:", tun.write()) }()
go func() { tun.core.log.Errorln("WARNING: tun.read() exited with error:", tun.read()) }()
go func() { tun.core.log.Errorln("WARNING: tun.write() exited with error:", tun.write()) }()
if iftapmode {
go func() {
for {

22
src/yggdrasil/tun_bsd.go
View File

@ -114,9 +114,9 @@ func (tun *tunAdapter) setupAddress(addr string) error {
}
// Friendly output
tun.core.log.Printf("Interface name: %s", tun.iface.Name())
tun.core.log.Printf("Interface IPv6: %s", addr)
tun.core.log.Printf("Interface MTU: %d", tun.mtu)
tun.core.log.Infof("Interface name: %s", tun.iface.Name())
tun.core.log.Infof("Interface IPv6: %s", addr)
tun.core.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.core.log.Printf("Error in SIOCSIFMTU: %v", errno)
tun.core.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.core.log.Printf("Using ifconfig as fallback: %v", strings.Join(cmd.Args, " "))
tun.core.log.Warnf("Using ifconfig as fallback: %v", strings.Join(cmd.Args, " "))
output, err := cmd.CombinedOutput()
if err != nil {
tun.core.log.Printf("SIOCSIFMTU fallback failed: %v.", err)
tun.core.log.Println(string(output))
tun.core.log.Errorf("SIOCSIFMTU fallback failed: %v.", err)
tun.core.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.core.log.Printf("Error in SIOCSIFADDR_IN6: %v", errno)
tun.core.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.core.log.Printf("Using ifconfig as fallback: %v", strings.Join(cmd.Args, " "))
tun.core.log.Warnf("Using ifconfig as fallback: %v", strings.Join(cmd.Args, " "))
output, err := cmd.CombinedOutput()
if err != nil {
tun.core.log.Printf("SIOCSIFADDR_IN6 fallback failed: %v.", err)
tun.core.log.Println(string(output))
tun.core.log.Errorf("SIOCSIFADDR_IN6 fallback failed: %v.", err)
tun.core.log.Traceln(string(output))
}
}

12
src/yggdrasil/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.core.log.Printf("TAP mode is not supported on this platform, defaulting to TUN")
tun.core.log.Warnln("TAP mode is not supported on this platform, defaulting to TUN")
}
config := water.Config{DeviceType: water.TUN}
iface, err := water.New(config)
@ -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.core.log.Printf("Interface name: %s", ar.ifra_name)
tun.core.log.Printf("Interface IPv6: %s", addr)
tun.core.log.Printf("Interface MTU: %d", ir.ifru_mtu)
tun.core.log.Infof("Interface name: %s", ar.ifra_name)
tun.core.log.Infof("Interface IPv6: %s", addr)
tun.core.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.core.log.Printf("Error in darwin_SIOCAIFADDR_IN6: %v", errno)
tun.core.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.core.log.Printf("Error in SIOCSIFMTU: %v", errno)
tun.core.log.Errorf("Error in SIOCSIFMTU: %v", errno)
return err
}

6
src/yggdrasil/tun_linux.go
View File

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

2
src/yggdrasil/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.core.log.Println("Platform not supported, you must set the address of", tun.iface.Name(), "to", addr)
tun.core.log.Warnln("Platform not supported, you must set the address of", tun.iface.Name(), "to", addr)
return nil
}

28
src/yggdrasil/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.core.log.Printf("TUN mode is not supported on this platform, defaulting to TAP")
tun.core.log.Warnln("TUN mode is not supported on this platform, defaulting to TAP")
}
config := water.Config{DeviceType: water.TAP}
config.PlatformSpecificParams.ComponentID = "tap0901"
@ -34,16 +34,16 @@ func (tun *tunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int
tun.core.log.Printf("netsh command: %v", strings.Join(cmd.Args, " "))
output, err := cmd.CombinedOutput()
if err != nil {
tun.core.log.Printf("Windows netsh failed: %v.", err)
tun.core.log.Println(string(output))
tun.core.log.Errorf("Windows netsh failed: %v.", err)
tun.core.log.Traceln(string(output))
return err
}
cmd = exec.Command("netsh", "interface", "set", "interface", iface.Name(), "admin=ENABLED")
tun.core.log.Printf("netsh command: %v", strings.Join(cmd.Args, " "))
output, err = cmd.CombinedOutput()
if err != nil {
tun.core.log.Printf("Windows netsh failed: %v.", err)
tun.core.log.Println(string(output))
tun.core.log.Errorf("Windows netsh failed: %v.", err)
tun.core.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.core.log.Printf("Interface name: %s", tun.iface.Name())
tun.core.log.Printf("Interface IPv6: %s", addr)
tun.core.log.Printf("Interface MTU: %d", tun.mtu)
tun.core.log.Infof("Interface name: %s", tun.iface.Name())
tun.core.log.Infof("Interface IPv6: %s", addr)
tun.core.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.core.log.Printf("netsh command: %v", strings.Join(cmd.Args, " "))
tun.core.log.Debugln("netsh command: %v", strings.Join(cmd.Args, " "))
output, err := cmd.CombinedOutput()
if err != nil {
tun.core.log.Printf("Windows netsh failed: %v.", err)
tun.core.log.Println(string(output))
tun.core.log.Errorf("Windows netsh failed: %v.", err)
tun.core.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.core.log.Printf("netsh command: %v", strings.Join(cmd.Args, " "))
tun.core.log.Debugln("netsh command: %v", strings.Join(cmd.Args, " "))
output, err := cmd.CombinedOutput()
if err != nil {
tun.core.log.Printf("Windows netsh failed: %v.", err)
tun.core.log.Println(string(output))
tun.core.log.Errorf("Windows netsh failed: %v.", err)
tun.core.log.Traceln(string(output))
return err
}
return nil