yggdrasil-network/yggdrasil-go
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Merge pull request #182 from yggdrasil-network/source-interface

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Support adding peers on specific interfaces
This commit is contained in:
Arceliar 2018-09-26 07:48:55 -05:00 • committed by GitHub
commit 7e3426ba93
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6 changed files with 91 additions and 35 deletions
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18
src/yggdrasil/admin.go
View file

@ -112,8 +112,14 @@ func (a *admin) init(c *Core, listenaddr string) {
}
return admin_info{"sessions": sessions}, nil
})
a.addHandler("addPeer", []string{"uri"}, func(in admin_info) (admin_info, error) {
if a.addPeer(in["uri"].(string)) == nil {
a.addHandler("addPeer", []string{"uri", "[interface]"}, func(in admin_info) (admin_info, error) {
// Set sane defaults
intf := ""
// Has interface been specified?
if itf, ok := in["interface"]; ok {
intf = itf.(string)
}
if a.addPeer(in["uri"].(string), intf) == nil {
return admin_info{
"added": []string{
in["uri"].(string),
@ -390,12 +396,12 @@ func (a *admin) printInfos(infos []admin_nodeInfo) string {
}
// addPeer triggers a connection attempt to a node.
func (a *admin) addPeer(addr string) error {
func (a *admin) addPeer(addr string, sintf string) error {
u, err := url.Parse(addr)
if err == nil {
switch strings.ToLower(u.Scheme) {
case "tcp":
a.core.tcp.connect(u.Host)
a.core.tcp.connect(u.Host, sintf)
case "socks":
a.core.tcp.connectSOCKS(u.Host, u.Path[1:])
default:
@ -407,7 +413,7 @@ func (a *admin) addPeer(addr string) error {
if strings.HasPrefix(addr, "tcp:") {
addr = addr[4:]
}
a.core.tcp.connect(addr)
a.core.tcp.connect(addr, "")
return nil
}
return nil
@ -504,6 +510,8 @@ func (a *admin) getData_getSwitchPeers() []admin_nodeInfo {
{"ip", net.IP(addr[:]).String()},
{"coords", fmt.Sprint(coords)},
{"port", elem.port},
{"bytes_sent", atomic.LoadUint64(&peer.bytesSent)},
{"bytes_recvd", atomic.LoadUint64(&peer.bytesRecvd)},
}
peerInfos = append(peerInfos, info)
}

27
src/yggdrasil/config/config.go
View file

@ -2,19 +2,20 @@ package config
// NodeConfig defines all configuration values needed to run a signle yggdrasil node
type NodeConfig struct {
Listen string `comment:"Listen address for peer connections. Default is to listen for all\nTCP connections over IPv4 and IPv6 with a random port."`
AdminListen string `comment:"Listen address for admin connections Default is to listen for local\nconnections either on TCP/9001 or a UNIX socket depending on your\nplatform. Use this value for yggdrasilctl -endpoint=X."`
Peers []string `comment:"List of connection strings for static peers in URI format, i.e.\ntcp://a.b.c.d:e or socks://a.b.c.d:e/f.g.h.i:j"`
ReadTimeout int32 `comment:"Read timeout for connections, specified in milliseconds. If less than 6000 and not negative, 6000 (the default) is used. If negative, reads won't time out."`
AllowedEncryptionPublicKeys []string `comment:"List of peer encryption public keys to allow or incoming TCP\nconnections from. If left empty/undefined then all connections\nwill be allowed by default."`
EncryptionPublicKey string `comment:"Your public encryption key. Your peers may ask you for this to put\ninto their AllowedEncryptionPublicKeys configuration."`
EncryptionPrivateKey string `comment:"Your private encryption key. DO NOT share this with anyone!"`
SigningPublicKey string `comment:"Your public signing key. You should not ordinarily need to share\nthis with anyone."`
SigningPrivateKey string `comment:"Your private signing key. DO NOT share this with anyone!"`
MulticastInterfaces []string `comment:"Regular expressions for which interfaces multicast peer discovery\nshould be enabled on. If none specified, multicast peer discovery is\ndisabled. The default value is .* which uses all interfaces."`
IfName string `comment:"Local network interface name for TUN/TAP adapter, or \"auto\" to select\nan interface automatically, or \"none\" to run without TUN/TAP."`
IfTAPMode bool `comment:"Set local network interface to TAP mode rather than TUN mode if\nsupported by your platform - option will be ignored if not."`
IfMTU int `comment:"Maximux Transmission Unit (MTU) size for your local TUN/TAP interface.\nDefault is the largest supported size for your platform. The lowest\npossible value is 1280."`
Listen string `comment:"Listen address for peer connections. Default is to listen for all\nTCP connections over IPv4 and IPv6 with a random port."`
AdminListen string `comment:"Listen address for admin connections Default is to listen for local\nconnections either on TCP/9001 or a UNIX socket depending on your\nplatform. Use this value for yggdrasilctl -endpoint=X."`
Peers []string `comment:"List of connection strings for static peers in URI format, i.e.\ntcp://a.b.c.d:e or socks://a.b.c.d:e/f.g.h.i:j."`
InterfacePeers map[string][]string `comment:"List of connection strings for static peers in URI format, arranged\nby source interface, i.e. { \"eth0\": [ tcp://a.b.c.d:e ] }. Note that\nSOCKS peerings will NOT be affected by this option and should go in\nthe \"Peers\" section instead."`
ReadTimeout int32 `comment:"Read timeout for connections, specified in milliseconds. If less\nthan 6000 and not negative, 6000 (the default) is used. If negative,\nreads won't time out."`
AllowedEncryptionPublicKeys []string `comment:"List of peer encryption public keys to allow or incoming TCP\nconnections from. If left empty/undefined then all connections\nwill be allowed by default."`
EncryptionPublicKey string `comment:"Your public encryption key. Your peers may ask you for this to put\ninto their AllowedEncryptionPublicKeys configuration."`
EncryptionPrivateKey string `comment:"Your private encryption key. DO NOT share this with anyone!"`
SigningPublicKey string `comment:"Your public signing key. You should not ordinarily need to share\nthis with anyone."`
SigningPrivateKey string `comment:"Your private signing key. DO NOT share this with anyone!"`
MulticastInterfaces []string `comment:"Regular expressions for which interfaces multicast peer discovery\nshould be enabled on. If none specified, multicast peer discovery is\ndisabled. The default value is .* which uses all interfaces."`
IfName string `comment:"Local network interface name for TUN/TAP adapter, or \"auto\" to select\nan interface automatically, or \"none\" to run without TUN/TAP."`
IfTAPMode bool `comment:"Set local network interface to TAP mode rather than TUN mode if\nsupported by your platform - option will be ignored if not."`
IfMTU int `comment:"Maximux Transmission Unit (MTU) size for your local TUN/TAP interface.\nDefault is the largest supported size for your platform. The lowest\npossible value is 1280."`
//Net NetConfig `comment:"Extended options for connecting to peers over other networks."`
}

4
src/yggdrasil/core.go
View file

@ -182,8 +182,8 @@ func (c *Core) SetLogger(log *log.Logger) {
// Adds a peer. This should be specified in the peer URI format, i.e.
// tcp://a.b.c.d:e, udp://a.b.c.d:e, socks://a.b.c.d:e/f.g.h.i:j
func (c *Core) AddPeer(addr string) error {
return c.admin.addPeer(addr)
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

2
src/yggdrasil/multicast.go
View file

@ -153,6 +153,6 @@ func (m *multicast) listen() {
}
addr.Zone = from.Zone
saddr := addr.String()
m.core.tcp.connect(saddr)
m.core.tcp.connect(saddr, "")
}
}

62
src/yggdrasil/tcp.go
View file

@ -64,13 +64,13 @@ func (iface *tcpInterface) getAddr() *net.TCPAddr {
}
// Attempts to initiate a connection to the provided address.
func (iface *tcpInterface) connect(addr string) {
iface.call(addr, nil)
func (iface *tcpInterface) connect(addr string, intf string) {
iface.call(addr, nil, intf)
}
// Attempst to initiate a connection to the provided address, viathe provided socks proxy address.
func (iface *tcpInterface) connectSOCKS(socksaddr, peeraddr string) {
iface.call(peeraddr, &socksaddr)
iface.call(peeraddr, &socksaddr, "")
}
// Initializes the struct.
@ -110,20 +110,24 @@ func (iface *tcpInterface) listener() {
// If the dial is successful, it launches the handler.
// When finished, it removes the outgoing call, so reconnection attempts can be made later.
// This all happens in a separate goroutine that it spawns.
func (iface *tcpInterface) call(saddr string, socksaddr *string) {
func (iface *tcpInterface) call(saddr string, socksaddr *string, sintf string) {
go func() {
callname := saddr
if sintf != "" {
callname = fmt.Sprintf("%s/%s", saddr, sintf)
}
quit := false
iface.mutex.Lock()
if _, isIn := iface.calls[saddr]; isIn {
if _, isIn := iface.calls[callname]; isIn {
quit = true
} else {
iface.calls[saddr] = struct{}{}
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, saddr)
delete(iface.calls, callname)
iface.mutex.Unlock()
}()
}
@ -134,6 +138,9 @@ func (iface *tcpInterface) call(saddr string, socksaddr *string) {
var conn net.Conn
var err error
if socksaddr != nil {
if sintf != "" {
return
}
var dialer proxy.Dialer
dialer, err = proxy.SOCKS5("tcp", *socksaddr, nil, proxy.Direct)
if err != nil {
@ -151,7 +158,39 @@ func (iface *tcpInterface) call(saddr string, socksaddr *string) {
},
}
} else {
conn, err = net.Dial("tcp", saddr)
dialer := net.Dialer{}
if sintf != "" {
ief, err := net.InterfaceByName(sintf)
if err == nil {
if ief.Flags & net.FlagUp == 0 {
return
}
addrs, err := ief.Addrs()
if err == nil {
dst, err := net.ResolveTCPAddr("tcp", saddr)
if err != nil {
return
}
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 dialer.LocalAddr == nil {
return
}
}
}
}
conn, err = dialer.Dial("tcp", saddr)
if err != nil {
return
}
@ -307,17 +346,18 @@ func (iface *tcpInterface) handler(sock net.Conn, incoming bool) {
// Put all of our cleanup here...
p.core.peers.removePeer(p.port)
}()
us, _, _ := net.SplitHostPort(sock.LocalAddr().String())
them, _, _ := net.SplitHostPort(sock.RemoteAddr().String())
themNodeID := getNodeID(&info.box)
themAddr := address_addrForNodeID(themNodeID)
themAddrString := net.IP(themAddr[:]).String()
themString := fmt.Sprintf("%s@%s", themAddrString, them)
iface.core.log.Println("Connected:", themString)
iface.core.log.Println("Connected:", themString, "source", us)
err = iface.reader(sock, in) // In this goroutine, because of defers
if err == nil {
iface.core.log.Println("Disconnected:", themString)
iface.core.log.Println("Disconnected:", themString, "source", us)
} else {
iface.core.log.Println("Disconnected:", themString, "with error:", err)
iface.core.log.Println("Disconnected:", themString, "source", us, "with error:", err)
}
return
}