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Refactoring: move tuntap and icmpv6 into separate package

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This commit is contained in:
Neil Alexander 2019-03-28 00:30:25 +00:00
parent 67c670ab4c
commit 0b494a8255
No known key found for this signature in database
GPG Key ID: A02A2019A2BB0944
20 changed files with 307 additions and 240 deletions
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3
cmd/yggdrasil/main.go
View File

@ -19,6 +19,7 @@ import (
"github.com/mitchellh/mapstructure"
"github.com/yggdrasil-network/yggdrasil-go/src/config"
"github.com/yggdrasil-network/yggdrasil-go/src/tuntap"
"github.com/yggdrasil-network/yggdrasil-go/src/yggdrasil"
)
@ -27,6 +28,7 @@ type Core = yggdrasil.Core
type node struct {
core Core
tun tuntap.TunAdapter
}
func readConfig(useconf *bool, useconffile *string, normaliseconf *bool) *nodeConfig {
@ -247,6 +249,7 @@ func main() {
// 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.
n.core.SetRouterAdapter(&n.tun)
if err := n.core.Start(cfg, logger); err != nil {
logger.Errorln("An error occurred during startup")
panic(err)

25
src/config/config.go
View File

@ -2,11 +2,36 @@ package config
import (
"encoding/hex"
"sync"
"github.com/yggdrasil-network/yggdrasil-go/src/crypto"
"github.com/yggdrasil-network/yggdrasil-go/src/defaults"
)
// NodeState represents the active and previous configuration of the node and
// protects it with a mutex
type NodeState struct {
Current NodeConfig
Previous NodeConfig
Mutex sync.RWMutex
}
// Get returns both the current and previous node configs
func (s *NodeState) Get() (NodeConfig, NodeConfig) {
s.Mutex.RLock()
defer s.Mutex.RUnlock()
return s.Current, s.Previous
}
// Replace the node configuration with new configuration
func (s *NodeState) Replace(n NodeConfig) NodeConfig {
s.Mutex.Lock()
defer s.Mutex.Unlock()
s.Previous = s.Current
s.Current = n
return s.Current
}
// NodeConfig defines all configuration values needed to run a signle yggdrasil node
type NodeConfig struct {
Peers []string `comment:"List of connection strings for outbound peer connections in URI format,\ne.g. tcp://a.b.c.d:e or socks://a.b.c.d:e/f.g.h.i:j. These connections\nwill obey the operating system routing table, therefore you should\nuse this section when you may connect via different interfaces."`

56
src/yggdrasil/icmpv6.go → src/tuntap/icmpv6.go
View File

@ -1,4 +1,4 @@
package yggdrasil
package tuntap
// The ICMPv6 module implements functions to easily create ICMPv6
// packets. These functions, when mixed with the built-in Go IPv6
@ -25,8 +25,8 @@ type macAddress [6]byte
const len_ETHER = 14
type icmpv6 struct {
tun *tunAdapter
type ICMPv6 struct {
tun *TunAdapter
mylladdr net.IP
mymac macAddress
peermacs map[address.Address]neighbor
@ -59,7 +59,7 @@ func ipv6Header_Marshal(h *ipv6.Header) ([]byte, error) {
// Initialises the ICMPv6 module by assigning our link-local IPv6 address and
// our MAC address. ICMPv6 messages will always appear to originate from these
// addresses.
func (i *icmpv6) init(t *tunAdapter) {
func (i *ICMPv6) Init(t *TunAdapter) {
i.tun = t
i.peermacs = make(map[address.Address]neighbor)
@ -69,23 +69,23 @@ func (i *icmpv6) init(t *tunAdapter) {
i.mylladdr = net.IP{
0xFE, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xFE}
copy(i.mymac[:], i.tun.core.router.addr[:])
copy(i.mylladdr[9:], i.tun.core.router.addr[1:])
copy(i.mymac[:], i.tun.addr[:])
copy(i.mylladdr[9:], i.tun.addr[1:])
}
// Parses an incoming ICMPv6 packet. The packet provided may be either an
// ethernet frame containing an IP packet, or the IP packet alone. This is
// determined by whether the TUN/TAP adapter is running in TUN (layer 3) or
// TAP (layer 2) mode.
func (i *icmpv6) parse_packet(datain []byte) {
func (i *ICMPv6) ParsePacket(datain []byte) {
var response []byte
var err error
// Parse the frame/packet
if i.tun.iface.IsTAP() {
response, err = i.parse_packet_tap(datain)
if i.tun.IsTAP() {
response, err = i.UnmarshalPacketL2(datain)
} else {
response, err = i.parse_packet_tun(datain, nil)
response, err = i.UnmarshalPacket(datain, nil)
}
if err != nil {
@ -93,22 +93,22 @@ func (i *icmpv6) parse_packet(datain []byte) {
}
// Write the packet to TUN/TAP
i.tun.iface.Write(response)
i.tun.Send <- response
}
// Unwraps the ethernet headers of an incoming ICMPv6 packet and hands off
// the IP packet to the parse_packet_tun function for further processing.
// the IP packet to the ParsePacket function for further processing.
// A response buffer is also created for the response message, also complete
// with ethernet headers.
func (i *icmpv6) parse_packet_tap(datain []byte) ([]byte, error) {
func (i *ICMPv6) UnmarshalPacketL2(datain []byte) ([]byte, error) {
// Ignore non-IPv6 frames
if binary.BigEndian.Uint16(datain[12:14]) != uint16(0x86DD) {
return nil, nil
}
// Hand over to parse_packet_tun to interpret the IPv6 packet
// Hand over to ParsePacket to interpret the IPv6 packet
mac := datain[6:12]
ipv6packet, err := i.parse_packet_tun(datain[len_ETHER:], &mac)
ipv6packet, err := i.UnmarshalPacket(datain[len_ETHER:], &mac)
if err != nil {
return nil, err
}
@ -130,7 +130,7 @@ func (i *icmpv6) parse_packet_tap(datain []byte) ([]byte, error) {
// sanity checks on the packet - i.e. is the packet an ICMPv6 packet, does the
// ICMPv6 message match a known expected type. The relevant handler function
// is then called and a response packet may be returned.
func (i *icmpv6) parse_packet_tun(datain []byte, datamac *[]byte) ([]byte, error) {
func (i *ICMPv6) UnmarshalPacket(datain []byte, datamac *[]byte) ([]byte, error) {
// Parse the IPv6 packet headers
ipv6Header, err := ipv6.ParseHeader(datain[:ipv6.HeaderLen])
if err != nil {
@ -156,13 +156,13 @@ func (i *icmpv6) parse_packet_tun(datain []byte, datamac *[]byte) ([]byte, error
// Check for a supported message type
switch icmpv6Header.Type {
case ipv6.ICMPTypeNeighborSolicitation:
if !i.tun.iface.IsTAP() {
if !i.tun.IsTAP() {
return nil, errors.New("Ignoring Neighbor Solicitation in TUN mode")
}
response, err := i.handle_ndp(datain[ipv6.HeaderLen:])
response, err := i.HandleNDP(datain[ipv6.HeaderLen:])
if err == nil {
// Create our ICMPv6 response
responsePacket, err := i.create_icmpv6_tun(
responsePacket, err := CreateICMPv6(
ipv6Header.Src, i.mylladdr,
ipv6.ICMPTypeNeighborAdvertisement, 0,
&icmp.DefaultMessageBody{Data: response})
@ -176,7 +176,7 @@ func (i *icmpv6) parse_packet_tun(datain []byte, datamac *[]byte) ([]byte, error
return nil, err
}
case ipv6.ICMPTypeNeighborAdvertisement:
if !i.tun.iface.IsTAP() {
if !i.tun.IsTAP() {
return nil, errors.New("Ignoring Neighbor Advertisement in TUN mode")
}
if datamac != nil {
@ -202,9 +202,9 @@ func (i *icmpv6) parse_packet_tun(datain []byte, datamac *[]byte) ([]byte, error
// Creates an ICMPv6 packet based on the given icmp.MessageBody and other
// parameters, complete with ethernet and IP headers, which can be written
// directly to a TAP adapter.
func (i *icmpv6) create_icmpv6_tap(dstmac macAddress, dst net.IP, src net.IP, mtype ipv6.ICMPType, mcode int, mbody icmp.MessageBody) ([]byte, error) {
// Pass through to create_icmpv6_tun
ipv6packet, err := i.create_icmpv6_tun(dst, src, mtype, mcode, mbody)
func (i *ICMPv6) CreateICMPv6L2(dstmac macAddress, dst net.IP, src net.IP, mtype ipv6.ICMPType, mcode int, mbody icmp.MessageBody) ([]byte, error) {
// Pass through to CreateICMPv6
ipv6packet, err := CreateICMPv6(dst, src, mtype, mcode, mbody)
if err != nil {
return nil, err
}
@ -224,9 +224,9 @@ func (i *icmpv6) create_icmpv6_tap(dstmac macAddress, dst net.IP, src net.IP, mt
// Creates an ICMPv6 packet based on the given icmp.MessageBody and other
// parameters, complete with IP headers only, which can be written directly to
// a TUN adapter, or called directly by the create_icmpv6_tap function when
// a TUN adapter, or called directly by the CreateICMPv6L2 function when
// generating a message for TAP adapters.
func (i *icmpv6) create_icmpv6_tun(dst net.IP, src net.IP, mtype ipv6.ICMPType, mcode int, mbody icmp.MessageBody) ([]byte, error) {
func CreateICMPv6(dst net.IP, src net.IP, mtype ipv6.ICMPType, mcode int, mbody icmp.MessageBody) ([]byte, error) {
// Create the ICMPv6 message
icmpMessage := icmp.Message{
Type: mtype,
@ -265,7 +265,7 @@ func (i *icmpv6) create_icmpv6_tun(dst net.IP, src net.IP, mtype ipv6.ICMPType,
return responsePacket, nil
}
func (i *icmpv6) create_ndp_tap(dst address.Address) ([]byte, error) {
func (i *ICMPv6) CreateNDPL2(dst address.Address) ([]byte, error) {
// Create the ND payload
var payload [28]byte
copy(payload[:4], []byte{0x00, 0x00, 0x00, 0x00})
@ -287,7 +287,7 @@ func (i *icmpv6) create_ndp_tap(dst address.Address) ([]byte, error) {
copy(dstmac[2:6], dstaddr[12:16])
// Create the ND request
requestPacket, err := i.create_icmpv6_tap(
requestPacket, err := i.CreateICMPv6L2(
dstmac, dstaddr[:], i.mylladdr,
ipv6.ICMPTypeNeighborSolicitation, 0,
&icmp.DefaultMessageBody{Data: payload[:]})
@ -305,7 +305,7 @@ func (i *icmpv6) create_ndp_tap(dst address.Address) ([]byte, error) {
// when the host operating system generates an NDP request for any address in
// the fd00::/8 range, so that the operating system knows to route that traffic
// to the Yggdrasil TAP adapter.
func (i *icmpv6) handle_ndp(in []byte) ([]byte, error) {
func (i *ICMPv6) HandleNDP(in []byte) ([]byte, error) {
// Ignore NDP requests for anything outside of fd00::/8
var source address.Address
copy(source[:], in[8:])

104
src/yggdrasil/tun.go → src/tuntap/tun.go
View File

@ -1,4 +1,4 @@
package yggdrasil
package tuntap
// This manages the tun driver to send/recv packets to/from applications
@ -10,21 +10,29 @@ import (
"sync"
"time"
"github.com/gologme/log"
"github.com/songgao/packets/ethernet"
"github.com/yggdrasil-network/water"
"github.com/yggdrasil-network/yggdrasil-go/src/address"
"github.com/yggdrasil-network/yggdrasil-go/src/config"
"github.com/yggdrasil-network/yggdrasil-go/src/defaults"
"github.com/yggdrasil-network/yggdrasil-go/src/util"
"github.com/yggdrasil-network/yggdrasil-go/src/yggdrasil"
)
const tun_IPv6_HEADER_LENGTH = 40
const tun_ETHER_HEADER_LENGTH = 14
// Represents a running TUN/TAP interface.
type tunAdapter struct {
Adapter
icmpv6 icmpv6
type TunAdapter struct {
yggdrasil.Adapter
addr address.Address
subnet address.Subnet
log *log.Logger
config *config.NodeState
icmpv6 ICMPv6
mtu int
iface *water.Interface
mutex sync.RWMutex // Protects the below
@ -40,20 +48,37 @@ func getSupportedMTU(mtu int) int {
return mtu
}
// Get the adapter name
func (tun *TunAdapter) Name() string {
return tun.iface.Name()
}
// Get the adapter MTU
func (tun *TunAdapter) MTU() int {
return getSupportedMTU(tun.mtu)
}
// Get the adapter mode
func (tun *TunAdapter) IsTAP() bool {
return tun.iface.IsTAP()
}
// Initialises the TUN/TAP adapter.
func (tun *tunAdapter) init(core *Core, send chan<- []byte, recv <-chan []byte) {
tun.Adapter.init(core, send, recv)
tun.icmpv6.init(tun)
func (tun *TunAdapter) Init(config *config.NodeState, log *log.Logger, send chan<- []byte, recv <-chan []byte) {
tun.config = config
tun.log = log
tun.Adapter.Init(config, log, 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()
e := <-tun.Reconfigure
tun.config.Mutex.RLock()
updated := tun.config.Current.IfName != tun.config.Previous.IfName ||
tun.config.Current.IfTAPMode != tun.config.Previous.IfTAPMode ||
tun.config.Current.IfMTU != tun.config.Previous.IfMTU
tun.config.Mutex.RUnlock()
if updated {
tun.core.log.Warnln("Reconfiguring TUN/TAP is not supported yet")
tun.log.Warnln("Reconfiguring TUN/TAP is not supported yet")
e <- nil
} else {
e <- nil
@ -64,13 +89,18 @@ func (tun *tunAdapter) init(core *Core, send chan<- []byte, recv <-chan []byte)
// 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() 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()
func (tun *TunAdapter) Start(a address.Address, s address.Subnet) error {
tun.addr = a
tun.subnet = s
if tun.config == nil {
return errors.New("No configuration available to TUN/TAP")
}
tun.config.Mutex.RLock()
ifname := tun.config.Current.IfName
iftapmode := tun.config.Current.IfTAPMode
addr := fmt.Sprintf("%s/%d", net.IP(tun.addr[:]).String(), 8*len(address.GetPrefix())-1)
mtu := tun.config.Current.IfMTU
tun.config.Mutex.RUnlock()
if ifname != "none" {
if err := tun.setup(ifname, iftapmode, addr, mtu); err != nil {
return err
@ -82,15 +112,15 @@ func (tun *tunAdapter) start() error {
tun.mutex.Lock()
tun.isOpen = true
tun.mutex.Unlock()
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()) }()
go func() { tun.log.Errorln("WARNING: tun.read() exited with error:", tun.Read()) }()
go func() { tun.log.Errorln("WARNING: tun.write() exited with error:", tun.Write()) }()
if iftapmode {
go func() {
for {
if _, ok := tun.icmpv6.peermacs[tun.core.router.addr]; ok {
if _, ok := tun.icmpv6.peermacs[tun.addr]; ok {
break
}
request, err := tun.icmpv6.create_ndp_tap(tun.core.router.addr)
request, err := tun.icmpv6.CreateNDPL2(tun.addr)
if err != nil {
panic(err)
}
@ -107,9 +137,9 @@ func (tun *tunAdapter) start() error {
// Writes a packet to the TUN/TAP adapter. If the adapter is running in TAP
// mode then additional ethernet encapsulation is added for the benefit of the
// host operating system.
func (tun *tunAdapter) write() error {
func (tun *TunAdapter) Write() error {
for {
data := <-tun.recv
data := <-tun.Recv
if tun.iface == nil {
continue
}
@ -132,7 +162,7 @@ func (tun *tunAdapter) write() error {
neigh, known := tun.icmpv6.peermacs[destAddr]
known = known && (time.Since(neigh.lastsolicitation).Seconds() < 30)
if !known {
request, err := tun.icmpv6.create_ndp_tap(destAddr)
request, err := tun.icmpv6.CreateNDPL2(destAddr)
if err != nil {
panic(err)
}
@ -147,21 +177,21 @@ func (tun *tunAdapter) write() error {
var peermac macAddress
var peerknown bool
if data[0]&0xf0 == 0x40 {
destAddr = tun.core.router.addr
destAddr = tun.addr
} else if data[0]&0xf0 == 0x60 {
if !bytes.Equal(tun.core.router.addr[:16], destAddr[:16]) && !bytes.Equal(tun.core.router.subnet[:8], destAddr[:8]) {
destAddr = tun.core.router.addr
if !bytes.Equal(tun.addr[:16], destAddr[:16]) && !bytes.Equal(tun.subnet[:8], destAddr[:8]) {
destAddr = tun.addr
}
}
if neighbor, ok := tun.icmpv6.peermacs[destAddr]; ok && neighbor.learned {
peermac = neighbor.mac
peerknown = true
} else if neighbor, ok := tun.icmpv6.peermacs[tun.core.router.addr]; ok && neighbor.learned {
} else if neighbor, ok := tun.icmpv6.peermacs[tun.addr]; ok && neighbor.learned {
peermac = neighbor.mac
peerknown = true
sendndp(destAddr)
} else {
sendndp(tun.core.router.addr)
sendndp(tun.addr)
}
if peerknown {
var proto ethernet.Ethertype
@ -210,7 +240,7 @@ func (tun *tunAdapter) write() error {
// is running in TAP mode then the ethernet headers will automatically be
// processed and stripped if necessary. If an ICMPv6 packet is found, then
// the relevant helper functions in icmpv6.go are called.
func (tun *tunAdapter) read() error {
func (tun *TunAdapter) Read() error {
mtu := tun.mtu
if tun.iface.IsTAP() {
mtu += tun_ETHER_HEADER_LENGTH
@ -244,18 +274,18 @@ func (tun *tunAdapter) read() error {
// Found an ICMPv6 packet
b := make([]byte, n)
copy(b, buf)
go tun.icmpv6.parse_packet(b)
go tun.icmpv6.ParsePacket(b)
}
}
packet := append(util.GetBytes(), buf[o:n]...)
tun.send <- packet
tun.Send <- packet
}
}
// Closes the TUN/TAP adapter. This is only usually called when the Yggdrasil
// process stops. Typically this operation will happen quickly, but on macOS
// it can block until a read operation is completed.
func (tun *tunAdapter) close() error {
func (tun *TunAdapter) Close() error {
tun.mutex.Lock()
tun.isOpen = false
tun.mutex.Unlock()

6
src/yggdrasil/tun_bsd.go → src/tuntap/tun_bsd.go
View File

@ -1,6 +1,6 @@
// +build openbsd freebsd netbsd
package yggdrasil
package tuntap
import (
"encoding/binary"
@ -77,7 +77,7 @@ type in6_ifreq_lifetime struct {
// a system socket and making syscalls to the kernel. This is not refined though
// and often doesn't work (if at all), therefore if a call fails, it resorts
// to calling "ifconfig" instead.
func (tun *tunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int) error {
func (tun *TunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int) error {
var config water.Config
if ifname[:4] == "auto" {
ifname = "/dev/tap0"
@ -103,7 +103,7 @@ func (tun *tunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int
return tun.setupAddress(addr)
}
func (tun *tunAdapter) setupAddress(addr string) error {
func (tun *TunAdapter) setupAddress(addr string) error {
var sfd int
var err error

20
src/yggdrasil/tun_darwin.go → src/tuntap/tun_darwin.go
View File

@ -1,6 +1,6 @@
// +build !mobile
package yggdrasil
package tuntap
// The darwin platform specific tun parts
@ -16,9 +16,9 @@ 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 {
func (tun *TunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int) error {
if iftapmode {
tun.core.log.Warnln("TAP mode is not supported on this platform, defaulting to TUN")
tun.log.Warnln("TAP mode is not supported on this platform, defaulting to TUN")
}
config := water.Config{DeviceType: water.TUN}
iface, err := water.New(config)
@ -64,12 +64,12 @@ type ifreq struct {
// Sets the IPv6 address of the utun adapter. On Darwin/macOS this is done using
// a system socket and making direct syscalls to the kernel.
func (tun *tunAdapter) setupAddress(addr string) error {
func (tun *TunAdapter) setupAddress(addr string) error {
var fd int
var err error
if fd, err = unix.Socket(unix.AF_INET6, unix.SOCK_DGRAM, 0); err != nil {
tun.core.log.Printf("Create AF_SYSTEM socket failed: %v.", err)
tun.log.Printf("Create AF_SYSTEM socket failed: %v.", err)
return err
}
@ -98,19 +98,19 @@ func (tun *tunAdapter) setupAddress(addr string) error {
copy(ir.ifr_name[:], tun.iface.Name())
ir.ifru_mtu = uint32(tun.mtu)
tun.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)
tun.log.Infof("Interface name: %s", ar.ifra_name)
tun.log.Infof("Interface IPv6: %s", addr)
tun.log.Infof("Interface MTU: %d", ir.ifru_mtu)
if _, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), uintptr(darwin_SIOCAIFADDR_IN6), uintptr(unsafe.Pointer(&ar))); errno != 0 {
err = errno
tun.core.log.Errorf("Error in darwin_SIOCAIFADDR_IN6: %v", errno)
tun.log.Errorf("Error in darwin_SIOCAIFADDR_IN6: %v", errno)
return err
}
if _, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), uintptr(unix.SIOCSIFMTU), uintptr(unsafe.Pointer(&ir))); errno != 0 {
err = errno
tun.core.log.Errorf("Error in SIOCSIFMTU: %v", errno)
tun.log.Errorf("Error in SIOCSIFMTU: %v", errno)
return err
}

6
src/yggdrasil/tun_dummy.go → src/tuntap/tun_dummy.go
View File

@ -1,19 +1,19 @@
// +build mobile
package yggdrasil
package tuntap
// This is to catch unsupported platforms
// If your platform supports tun devices, you could try configuring it manually
// Creates the TUN/TAP adapter, if supported by the Water library. Note that
// no guarantees are made at this point on an unsupported platform.
func (tun *tunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int) error {
func (tun *TunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int) error {
tun.mtu = getSupportedMTU(mtu)
return tun.setupAddress(addr)
}
// 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 {
func (tun *TunAdapter) setupAddress(addr string) error {
return nil
}

6
src/yggdrasil/tun_linux.go → src/tuntap/tun_linux.go
View File

@ -1,6 +1,6 @@
// +build !mobile
package yggdrasil
package tuntap
// The linux platform specific tun parts
@ -15,7 +15,7 @@ import (
)
// Configures the TAP adapter with the correct IPv6 address and MTU.
func (tun *tunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int) error {
func (tun *TunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int) error {
var config water.Config
if iftapmode {
config = water.Config{DeviceType: water.TAP}
@ -50,7 +50,7 @@ func (tun *tunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int
// is used to do this, so there is not a hard requirement on "ip" or "ifconfig"
// to exist on the system, but this will fail if Netlink is not present in the
// kernel (it nearly always is).
func (tun *tunAdapter) setupAddress(addr string) error {
func (tun *TunAdapter) setupAddress(addr string) error {
// Set address
var netIF *net.Interface
ifces, err := net.Interfaces()

6
src/yggdrasil/tun_other.go → src/tuntap/tun_other.go
View File

@ -1,6 +1,6 @@
// +build !linux,!darwin,!windows,!openbsd,!freebsd,!netbsd,!mobile
package yggdrasil
package tuntap
import water "github.com/yggdrasil-network/water"
@ -9,7 +9,7 @@ import water "github.com/yggdrasil-network/water"
// Creates the TUN/TAP adapter, if supported by the Water library. Note that
// no guarantees are made at this point on an unsupported platform.
func (tun *tunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int) error {
func (tun *TunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int) error {
var config water.Config
if iftapmode {
config = water.Config{DeviceType: water.TAP}
@ -27,7 +27,7 @@ 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 {
func (tun *TunAdapter) setupAddress(addr string) error {
tun.core.log.Warnln("Platform not supported, you must set the address of", tun.iface.Name(), "to", addr)
return nil
}

8
src/yggdrasil/tun_windows.go → src/tuntap/tun_windows.go
View File

@ -1,4 +1,4 @@
package yggdrasil
package tuntap
import (
"fmt"
@ -13,7 +13,7 @@ import (
// Configures the TAP adapter with the correct IPv6 address and MTU. On Windows
// we don't make use of a direct operating system API to do this - we instead
// delegate the hard work to "netsh".
func (tun *tunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int) error {
func (tun *TunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int) error {
if !iftapmode {
tun.core.log.Warnln("TUN mode is not supported on this platform, defaulting to TAP")
}
@ -65,7 +65,7 @@ func (tun *tunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int
}
// Sets the MTU of the TAP adapter.
func (tun *tunAdapter) setupMTU(mtu int) error {
func (tun *TunAdapter) setupMTU(mtu int) error {
// Set MTU
cmd := exec.Command("netsh", "interface", "ipv6", "set", "subinterface",
fmt.Sprintf("interface=%s", tun.iface.Name()),
@ -82,7 +82,7 @@ func (tun *tunAdapter) setupMTU(mtu int) error {
}
// Sets the IPv6 address of the TAP adapter.
func (tun *tunAdapter) setupAddress(addr string) error {
func (tun *TunAdapter) setupAddress(addr string) error {
// Set address
cmd := exec.Command("netsh", "interface", "ipv6", "add", "address",
fmt.Sprintf("interface=%s", tun.iface.Name()),

38
src/yggdrasil/adapter.go
View File

@ -1,18 +1,36 @@
package yggdrasil
import (
"github.com/gologme/log"
"github.com/yggdrasil-network/yggdrasil-go/src/address"
"github.com/yggdrasil-network/yggdrasil-go/src/config"
)
// Defines the minimum required struct members for an adapter type (this is
// now the base type for tunAdapter in tun.go)
// now the base type for TunAdapter in tun.go)
type Adapter struct {
core *Core
send chan<- []byte
recv <-chan []byte
reconfigure chan chan error
adapterImplementation
Core *Core
Send chan<- []byte
Recv <-chan []byte
Reconfigure chan chan error
}
// Defines the minimum required functions for an adapter type
type adapterImplementation interface {
Init(*config.NodeState, *log.Logger, chan<- []byte, <-chan []byte)
Name() string
MTU() int
IsTAP() bool
Start(address.Address, address.Subnet) error
Read() error
Write() error
Close() error
}
// Initialises the adapter.
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)
func (adapter Adapter) Init(config *config.NodeState, log *log.Logger, send chan<- []byte, recv <-chan []byte) {
adapter.Send = send
adapter.Recv = recv
adapter.Reconfigure = make(chan chan error, 1)
}

85
src/yggdrasil/admin.go
View File

@ -16,7 +16,6 @@ import (
"github.com/yggdrasil-network/yggdrasil-go/src/address"
"github.com/yggdrasil-network/yggdrasil-go/src/crypto"
"github.com/yggdrasil-network/yggdrasil-go/src/defaults"
)
// TODO: Add authentication
@ -58,19 +57,17 @@ func (a *admin) init(c *Core) {
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
current, previous := a.core.config.Get()
if current.AdminListen != previous.AdminListen {
a.listenaddr = current.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()
current, _ := a.core.config.Get()
a.listenaddr = current.AdminListen
a.addHandler("list", []string{}, func(in admin_info) (admin_info, error) {
handlers := make(map[string]interface{})
for _, handler := range a.handlers {
@ -171,47 +168,47 @@ func (a *admin) init(c *Core) {
}, errors.New("Failed to remove peer")
}
})
a.addHandler("getTunTap", []string{}, func(in admin_info) (r admin_info, e error) {
defer func() {
if err := recover(); err != nil {
r = admin_info{"none": admin_info{}}
e = nil
}
}()
/* a.addHandler("getTunTap", []string{}, func(in admin_info) (r admin_info, e error) {
defer func() {
if err := recover(); err != nil {
r = admin_info{"none": admin_info{}}
e = nil
}
}()
return admin_info{
a.core.router.tun.iface.Name(): admin_info{
"tap_mode": a.core.router.tun.iface.IsTAP(),
"mtu": a.core.router.tun.mtu,
},
}, nil
})
a.addHandler("setTunTap", []string{"name", "[tap_mode]", "[mtu]"}, func(in admin_info) (admin_info, error) {
// Set sane defaults
iftapmode := defaults.GetDefaults().DefaultIfTAPMode
ifmtu := defaults.GetDefaults().DefaultIfMTU
// Has TAP mode been specified?
if tap, ok := in["tap_mode"]; ok {
iftapmode = tap.(bool)
}
// Check we have enough params for MTU
if mtu, ok := in["mtu"]; ok {
if mtu.(float64) >= 1280 && ifmtu <= defaults.GetDefaults().MaximumIfMTU {
ifmtu = int(in["mtu"].(float64))
}
}
// Start the TUN adapter
if err := a.startTunWithMTU(in["name"].(string), iftapmode, ifmtu); err != nil {
return admin_info{}, errors.New("Failed to configure adapter")
} else {
return admin_info{
a.core.router.tun.iface.Name(): admin_info{
"tap_mode": a.core.router.tun.iface.IsTAP(),
"mtu": ifmtu,
"mtu": a.core.router.tun.mtu,
},
}, nil
}
})
})
a.addHandler("setTunTap", []string{"name", "[tap_mode]", "[mtu]"}, func(in admin_info) (admin_info, error) {
// Set sane defaults
iftapmode := defaults.GetDefaults().DefaultIfTAPMode
ifmtu := defaults.GetDefaults().DefaultIfMTU
// Has TAP mode been specified?
if tap, ok := in["tap_mode"]; ok {
iftapmode = tap.(bool)
}
// Check we have enough params for MTU
if mtu, ok := in["mtu"]; ok {
if mtu.(float64) >= 1280 && ifmtu <= defaults.GetDefaults().MaximumIfMTU {
ifmtu = int(in["mtu"].(float64))
}
}
// Start the TUN adapter
if err := a.startTunWithMTU(in["name"].(string), iftapmode, ifmtu); err != nil {
return admin_info{}, errors.New("Failed to configure adapter")
} else {
return admin_info{
a.core.router.tun.iface.Name(): admin_info{
"tap_mode": a.core.router.tun.iface.IsTAP(),
"mtu": ifmtu,
},
}, nil
}
})*/
a.addHandler("getMulticastInterfaces", []string{}, func(in admin_info) (admin_info, error) {
var intfs []string
for _, v := range a.core.multicast.interfaces() {
@ -609,6 +606,7 @@ func (a *admin) removePeer(p string) error {
}
// startTunWithMTU creates the tun/tap device, sets its address, and sets the MTU to the provided value.
/*
func (a *admin) startTunWithMTU(ifname string, iftapmode bool, ifmtu int) error {
// Close the TUN first if open
_ = a.core.router.tun.close()
@ -636,6 +634,7 @@ func (a *admin) startTunWithMTU(ifname string, iftapmode bool, ifmtu int) error
go a.core.router.tun.write()
return nil
}
*/
// getData_getSelf returns the self node's info for admin responses.
func (a *admin) getData_getSelf() *admin_nodeInfo {

13
src/yggdrasil/ckr.go
View File

@ -55,25 +55,24 @@ func (c *cryptokey) init(core *Core) {
// 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()
current, _ := c.core.config.Get()
// Set enabled/disabled state
c.setEnabled(c.core.config.TunnelRouting.Enable)
c.setEnabled(current.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 {
for ipv6, pubkey := range current.TunnelRouting.IPv6Destinations {
if err := c.addRoute(ipv6, pubkey); err != nil {
return err
}
}
// Add IPv4 routes
for ipv4, pubkey := range c.core.config.TunnelRouting.IPv4Destinations {
for ipv4, pubkey := range current.TunnelRouting.IPv4Destinations {
if err := c.addRoute(ipv4, pubkey); err != nil {
return err
}
@ -85,7 +84,7 @@ func (c *cryptokey) configure() error {
// Add IPv6 sources
c.ipv6sources = make([]net.IPNet, 0)
for _, source := range c.core.config.TunnelRouting.IPv6Sources {
for _, source := range current.TunnelRouting.IPv6Sources {
if err := c.addSourceSubnet(source); err != nil {
return err
}
@ -93,7 +92,7 @@ func (c *cryptokey) configure() error {
// Add IPv4 sources
c.ipv4sources = make([]net.IPNet, 0)
for _, source := range c.core.config.TunnelRouting.IPv4Sources {
for _, source := range current.TunnelRouting.IPv4Sources {
if err := c.addSourceSubnet(source); err != nil {
return err
}

64
src/yggdrasil/core.go
View File

@ -4,7 +4,6 @@ import (
"encoding/hex"
"io/ioutil"
"net"
"sync"
"time"
"github.com/gologme/log"
@ -29,9 +28,7 @@ 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
config config.NodeState // Config
boxPub crypto.BoxPubKey
boxPriv crypto.BoxPrivKey
sigPub crypto.SigPubKey
@ -57,19 +54,21 @@ func (c *Core) init() error {
c.log = log.New(ioutil.Discard, "", 0)
}
boxPubHex, err := hex.DecodeString(c.config.EncryptionPublicKey)
current, _ := c.config.Get()
boxPubHex, err := hex.DecodeString(current.EncryptionPublicKey)
if err != nil {
return err
}
boxPrivHex, err := hex.DecodeString(c.config.EncryptionPrivateKey)
boxPrivHex, err := hex.DecodeString(current.EncryptionPrivateKey)
if err != nil {
return err
}
sigPubHex, err := hex.DecodeString(c.config.SigningPublicKey)
sigPubHex, err := hex.DecodeString(current.SigningPublicKey)
if err != nil {
return err
}
sigPrivHex, err := hex.DecodeString(c.config.SigningPrivateKey)
sigPrivHex, err := hex.DecodeString(current.SigningPrivateKey)
if err != nil {
return err
}
@ -97,19 +96,16 @@ func (c *Core) init() error {
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()
current, _ := c.config.Get()
// Add peers from the Peers section
for _, peer := range peers {
for _, peer := range current.Peers {
c.AddPeer(peer, "")
time.Sleep(time.Second)
}
// Add peers from the InterfacePeers section
for intf, intfpeers := range interfacepeers {
for intf, intfpeers := range current.InterfacePeers {
for _, peer := range intfpeers {
c.AddPeer(peer, intf)
time.Sleep(time.Second)
@ -126,10 +122,7 @@ func (c *Core) addPeerLoop() {
func (c *Core) UpdateConfig(config *config.NodeConfig) {
c.log.Infoln("Reloading configuration...")
c.configMutex.Lock()
c.configOld = c.config
c.config = *config
c.configMutex.Unlock()
c.config.Replace(*config)
errors := 0
@ -140,7 +133,7 @@ func (c *Core) UpdateConfig(config *config.NodeConfig) {
c.sessions.reconfigure,
c.peers.reconfigure,
c.router.reconfigure,
c.router.tun.reconfigure,
//c.router.tun.Reconfigure,
c.router.cryptokey.reconfigure,
c.switchTable.reconfigure,
c.link.reconfigure,
@ -181,13 +174,23 @@ func GetBuildVersion() string {
return buildVersion
}
// Starts up Yggdrasil using the provided NodeConfig, and outputs debug logging
// Set the router adapter
func (c *Core) SetRouterAdapter(adapter adapterImplementation) {
c.router.tun = adapter
}
// Starts up Yggdrasil using the provided NodeState, and outputs debug logging
// through the provided log.Logger. The started stack will include TCP and UDP
// sockets, a multicast discovery socket, an admin socket, router, switch and
// DHT node.
func (c *Core) Start(nc *config.NodeConfig, log *log.Logger) error {
c.log = log
c.config = config.NodeState{
Current: *nc,
Previous: *nc,
}
if name := GetBuildName(); name != "unknown" {
c.log.Infoln("Build name:", name)
}
@ -197,11 +200,6 @@ func (c *Core) Start(nc *config.NodeConfig, log *log.Logger) error {
c.log.Infoln("Starting up...")
c.configMutex.Lock()
c.config = *nc
c.configOld = c.config
c.configMutex.Unlock()
c.init()
if err := c.link.init(c); err != nil {
@ -209,9 +207,11 @@ func (c *Core) Start(nc *config.NodeConfig, log *log.Logger) error {
return err
}
if nc.SwitchOptions.MaxTotalQueueSize >= SwitchQueueTotalMinSize {
c.switchTable.queueTotalMaxSize = nc.SwitchOptions.MaxTotalQueueSize
c.config.Mutex.RLock()
if c.config.Current.SwitchOptions.MaxTotalQueueSize >= SwitchQueueTotalMinSize {
c.switchTable.queueTotalMaxSize = c.config.Current.SwitchOptions.MaxTotalQueueSize
}
c.config.Mutex.RUnlock()
if err := c.switchTable.start(); err != nil {
c.log.Errorln("Failed to start switch")
@ -233,7 +233,7 @@ func (c *Core) Start(nc *config.NodeConfig, log *log.Logger) error {
return err
}
if err := c.router.tun.start(); err != nil {
if err := c.router.tun.Start(c.router.addr, c.router.subnet); err != nil {
c.log.Errorln("Failed to start TUN/TAP")
return err
}
@ -247,7 +247,7 @@ func (c *Core) Start(nc *config.NodeConfig, log *log.Logger) error {
// Stops the Yggdrasil node.
func (c *Core) Stop() {
c.log.Infoln("Stopping...")
c.router.tun.close()
c.router.tun.Close()
c.admin.close()
}
@ -343,10 +343,12 @@ func (c *Core) GetTUNDefaultIfTAPMode() bool {
// Gets the current TUN/TAP interface name.
func (c *Core) GetTUNIfName() string {
return c.router.tun.iface.Name()
//return c.router.tun.iface.Name()
return c.router.tun.Name()
}
// Gets the current TUN/TAP interface MTU.
func (c *Core) GetTUNIfMTU() int {
return c.router.tun.mtu
//return c.router.tun.mtu
return c.router.tun.MTU()
}

10
src/yggdrasil/multicast.go
View File

@ -23,9 +23,8 @@ func (m *multicast) init(core *Core) {
m.core = core
m.reconfigure = make(chan chan error, 1)
m.listeners = make(map[string]*tcpListener)
m.core.configMutex.RLock()
m.listenPort = m.core.config.LinkLocalTCPPort
m.core.configMutex.RUnlock()
current, _ := m.core.config.Get()
m.listenPort = current.LinkLocalTCPPort
go func() {
for {
e := <-m.reconfigure
@ -70,9 +69,8 @@ func (m *multicast) start() error {
func (m *multicast) interfaces() map[string]net.Interface {
// Get interface expressions from config
m.core.configMutex.RLock()
exprs := m.core.config.MulticastInterfaces
m.core.configMutex.RUnlock()
current, _ := m.core.config.Get()
exprs := current.MulticastInterfaces
// Ask the system for network interfaces
interfaces := make(map[string]net.Interface)
allifaces, err := net.Interfaces()

34
src/yggdrasil/peer.go
View File

@ -44,42 +44,42 @@ func (ps *peers) init(c *Core) {
// because the key is in the whitelist or because the whitelist is empty.
func (ps *peers) isAllowedEncryptionPublicKey(box *crypto.BoxPubKey) bool {
boxstr := hex.EncodeToString(box[:])
ps.core.configMutex.RLock()
defer ps.core.configMutex.RUnlock()
for _, v := range ps.core.config.AllowedEncryptionPublicKeys {
ps.core.config.Mutex.RLock()
defer ps.core.config.Mutex.RUnlock()
for _, v := range ps.core.config.Current.AllowedEncryptionPublicKeys {
if v == boxstr {
return true
}
}
return len(ps.core.config.AllowedEncryptionPublicKeys) == 0
return len(ps.core.config.Current.AllowedEncryptionPublicKeys) == 0
}
// Adds a key to the whitelist.
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)
ps.core.config.Mutex.RLock()
defer ps.core.config.Mutex.RUnlock()
ps.core.config.Current.AllowedEncryptionPublicKeys =
append(ps.core.config.Current.AllowedEncryptionPublicKeys, box)
}
// Removes a key from the whitelist.
func (ps *peers) removeAllowedEncryptionPublicKey(box string) {
ps.core.configMutex.RLock()
defer ps.core.configMutex.RUnlock()
for k, v := range ps.core.config.AllowedEncryptionPublicKeys {
ps.core.config.Mutex.RLock()
defer ps.core.config.Mutex.RUnlock()
for k, v := range ps.core.config.Current.AllowedEncryptionPublicKeys {
if v == box {
ps.core.config.AllowedEncryptionPublicKeys =
append(ps.core.config.AllowedEncryptionPublicKeys[:k],
ps.core.config.AllowedEncryptionPublicKeys[k+1:]...)
ps.core.config.Current.AllowedEncryptionPublicKeys =
append(ps.core.config.Current.AllowedEncryptionPublicKeys[:k],
ps.core.config.Current.AllowedEncryptionPublicKeys[k+1:]...)
}
}
}
// Gets the whitelist of allowed keys for incoming connections.
func (ps *peers) getAllowedEncryptionPublicKeys() []string {
ps.core.configMutex.RLock()
defer ps.core.configMutex.RUnlock()
return ps.core.config.AllowedEncryptionPublicKeys
ps.core.config.Mutex.RLock()
defer ps.core.config.Mutex.RUnlock()
return ps.core.config.Current.AllowedEncryptionPublicKeys
}
// Atomically gets a map[switchPort]*peer of known peers.

25
src/yggdrasil/router.go
View File

@ -26,9 +26,6 @@ import (
"bytes"
"time"
"golang.org/x/net/icmp"
"golang.org/x/net/ipv6"
"github.com/yggdrasil-network/yggdrasil-go/src/address"
"github.com/yggdrasil-network/yggdrasil-go/src/crypto"
"github.com/yggdrasil-network/yggdrasil-go/src/util"
@ -44,8 +41,7 @@ type router struct {
in <-chan []byte // packets we received from the network, link to peer's "out"
out func([]byte) // packets we're sending to the network, link to peer's "in"
toRecv chan router_recvPacket // packets to handle via recvPacket()
tun tunAdapter // TUN/TAP adapter
adapters []Adapter // Other adapters
tun adapterImplementation // TUN/TAP adapter
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)
@ -112,11 +108,11 @@ func (r *router) init(core *Core) {
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.core.config.Mutex.RLock()
r.nodeinfo.setNodeInfo(r.core.config.Current.NodeInfo, r.core.config.Current.NodeInfoPrivacy)
r.core.config.Mutex.RUnlock()
r.cryptokey.init(r.core)
r.tun.init(r.core, send, recv)
r.tun.Init(&r.core.config, r.core.log, send, recv)
}
// Starts the mainLoop goroutine.
@ -157,9 +153,8 @@ 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()
current, _ := r.core.config.Get()
e <- r.nodeinfo.setNodeInfo(current.NodeInfo, current.NodeInfoPrivacy)
}
}
}
@ -308,7 +303,7 @@ func (r *router) sendPacket(bs []byte) {
// Generate an ICMPv6 Packet Too Big for packets larger than session MTU
if len(bs) > int(sinfo.getMTU()) {
// Get the size of the oversized payload, up to a max of 900 bytes
window := 900
/*window := 900
if int(sinfo.getMTU()) < window {
window = int(sinfo.getMTU())
}
@ -320,12 +315,12 @@ func (r *router) sendPacket(bs []byte) {
}
// Create the ICMPv6 response from it
icmpv6Buf, err := r.tun.icmpv6.create_icmpv6_tun(
icmpv6Buf, err := CreateICMPv6(
bs[8:24], bs[24:40],
ipv6.ICMPTypePacketTooBig, 0, ptb)
if err == nil {
r.recv <- icmpv6Buf
}
}*/
// Don't continue - drop the packet
return

22
src/yggdrasil/session.go
View File

@ -148,17 +148,17 @@ func (ss *sessions) init(core *Core) {
// Determines whether the session firewall is enabled.
func (ss *sessions) isSessionFirewallEnabled() bool {
ss.core.configMutex.RLock()
defer ss.core.configMutex.RUnlock()
ss.core.config.Mutex.RLock()
defer ss.core.config.Mutex.RUnlock()
return ss.core.config.SessionFirewall.Enable
return ss.core.config.Current.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()
ss.core.config.Mutex.RLock()
defer ss.core.config.Mutex.RUnlock()
// Allow by default if the session firewall is disabled
if !ss.isSessionFirewallEnabled() {
@ -167,7 +167,7 @@ func (ss *sessions) isSessionAllowed(pubkey *crypto.BoxPubKey, initiator bool) b
// Prepare for checking whitelist/blacklist
var box crypto.BoxPubKey
// Reject blacklisted nodes
for _, b := range ss.core.config.SessionFirewall.BlacklistEncryptionPublicKeys {
for _, b := range ss.core.config.Current.SessionFirewall.BlacklistEncryptionPublicKeys {
key, err := hex.DecodeString(b)
if err == nil {
copy(box[:crypto.BoxPubKeyLen], key)
@ -177,7 +177,7 @@ func (ss *sessions) isSessionAllowed(pubkey *crypto.BoxPubKey, initiator bool) b
}
}
// Allow whitelisted nodes
for _, b := range ss.core.config.SessionFirewall.WhitelistEncryptionPublicKeys {
for _, b := range ss.core.config.Current.SessionFirewall.WhitelistEncryptionPublicKeys {
key, err := hex.DecodeString(b)
if err == nil {
copy(box[:crypto.BoxPubKeyLen], key)
@ -187,7 +187,7 @@ func (ss *sessions) isSessionAllowed(pubkey *crypto.BoxPubKey, initiator bool) b
}
}
// Allow outbound sessions if appropriate
if ss.core.config.SessionFirewall.AlwaysAllowOutbound {
if ss.core.config.Current.SessionFirewall.AlwaysAllowOutbound {
if initiator {
return true
}
@ -201,11 +201,11 @@ func (ss *sessions) isSessionAllowed(pubkey *crypto.BoxPubKey, initiator bool) b
}
}
// Allow direct peers if appropriate
if ss.core.config.SessionFirewall.AllowFromDirect && isDirectPeer {
if ss.core.config.Current.SessionFirewall.AllowFromDirect && isDirectPeer {
return true
}
// Allow remote nodes if appropriate
if ss.core.config.SessionFirewall.AllowFromRemote && !isDirectPeer {
if ss.core.config.Current.SessionFirewall.AllowFromRemote && !isDirectPeer {
return true
}
// Finally, default-deny if not matching any of the above rules
@ -277,7 +277,7 @@ func (ss *sessions) createSession(theirPermKey *crypto.BoxPubKey) *sessionInfo {
sinfo.mySesPriv = *priv
sinfo.myNonce = *crypto.NewBoxNonce()
sinfo.theirMTU = 1280
sinfo.myMTU = uint16(ss.core.router.tun.mtu)
sinfo.myMTU = uint16(ss.core.router.tun.MTU())
now := time.Now()
sinfo.time = now
sinfo.mtuTime = now

2
src/yggdrasil/switch.go
View File

@ -188,9 +188,7 @@ func (t *switchTable) init(core *Core) {
now := time.Now()
t.core = core
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}

14
src/yggdrasil/tcp.go
View File

@ -82,10 +82,10 @@ func (t *tcp) init(l *link) error {
go func() {
for {
e := <-t.reconfigure
t.link.core.configMutex.RLock()
added := util.Difference(t.link.core.config.Listen, t.link.core.configOld.Listen)
deleted := util.Difference(t.link.core.configOld.Listen, t.link.core.config.Listen)
t.link.core.configMutex.RUnlock()
t.link.core.config.Mutex.RLock()
added := util.Difference(t.link.core.config.Current.Listen, t.link.core.config.Previous.Listen)
deleted := util.Difference(t.link.core.config.Previous.Listen, t.link.core.config.Current.Listen)
t.link.core.config.Mutex.RUnlock()
if len(added) > 0 || len(deleted) > 0 {
for _, a := range added {
if a[:6] != "tcp://" {
@ -115,9 +115,9 @@ func (t *tcp) init(l *link) error {
}
}()
t.link.core.configMutex.RLock()
defer t.link.core.configMutex.RUnlock()
for _, listenaddr := range t.link.core.config.Listen {
t.link.core.config.Mutex.RLock()
defer t.link.core.config.Mutex.RUnlock()
for _, listenaddr := range t.link.core.config.Current.Listen {
if listenaddr[:6] != "tcp://" {
continue
}