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https://github.com/cwinfo/yggdrasil-go.git
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Update water go.mod references, fix some bugs in TAP mode (which should hopefully fix Windows support too)
This commit is contained in:
parent
36201895e7
commit
48ad3c5d7f
2
go.mod
2
go.mod
@ -8,7 +8,7 @@ require (
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github.com/kardianos/minwinsvc v0.0.0-20151122163309-cad6b2b879b0
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github.com/mitchellh/mapstructure v1.1.2
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github.com/songgao/packets v0.0.0-20160404182456-549a10cd4091
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github.com/yggdrasil-network/water v0.0.0-20190720101301-5db94379a5eb
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github.com/yggdrasil-network/water v0.0.0-20190720145626-28ccb9101d55
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golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4
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golang.org/x/net v0.0.0-20190628185345-da137c7871d7
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golang.org/x/sys v0.0.0-20190712062909-fae7ac547cb7
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1
go.sum
1
go.sum
@ -17,6 +17,7 @@ github.com/yggdrasil-network/water v0.0.0-20180615095340-f732c88f34ae/go.mod h1:
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github.com/yggdrasil-network/water v0.0.0-20190719211521-a76871ea954b/go.mod h1:R0SBCsugm+Sf1katgTb2t7GXMm+nRIv43tM4VDZbaOs=
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github.com/yggdrasil-network/water v0.0.0-20190719213007-b160316e362e/go.mod h1:R0SBCsugm+Sf1katgTb2t7GXMm+nRIv43tM4VDZbaOs=
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github.com/yggdrasil-network/water v0.0.0-20190720101301-5db94379a5eb/go.mod h1:R0SBCsugm+Sf1katgTb2t7GXMm+nRIv43tM4VDZbaOs=
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github.com/yggdrasil-network/water v0.0.0-20190720145626-28ccb9101d55/go.mod h1:R0SBCsugm+Sf1katgTb2t7GXMm+nRIv43tM4VDZbaOs=
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golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9 h1:mKdxBk7AujPs8kU4m80U72y/zjbZ3UcXC7dClwKbUI0=
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golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
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golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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@ -78,8 +78,9 @@ func (i *ICMPv6) Init(t *TunAdapter) {
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// Parses an incoming ICMPv6 packet. The packet provided may be either an
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// ethernet frame containing an IP packet, or the IP packet alone. This is
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// determined by whether the TUN/TAP adapter is running in TUN (layer 3) or
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// TAP (layer 2) mode.
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func (i *ICMPv6) ParsePacket(datain []byte) {
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// TAP (layer 2) mode. Returns an error condition which is nil if the ICMPv6
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// module handled the packet or contains the error if not.
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func (i *ICMPv6) ParsePacket(datain []byte) error {
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var response []byte
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var err error
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@ -91,11 +92,12 @@ func (i *ICMPv6) ParsePacket(datain []byte) {
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}
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if err != nil {
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return
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return err
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}
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// Write the packet to TUN/TAP
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i.tun.iface.Write(response)
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return nil
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}
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// Unwraps the ethernet headers of an incoming ICMPv6 packet and hands off
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@ -105,7 +107,7 @@ func (i *ICMPv6) ParsePacket(datain []byte) {
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func (i *ICMPv6) UnmarshalPacketL2(datain []byte) ([]byte, error) {
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// Ignore non-IPv6 frames
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if binary.BigEndian.Uint16(datain[12:14]) != uint16(0x86DD) {
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return nil, nil
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return nil, errors.New("Ignoring non-IPv6 frame")
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}
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// Hand over to ParsePacket to interpret the IPv6 packet
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@ -141,12 +143,12 @@ func (i *ICMPv6) UnmarshalPacket(datain []byte, datamac *[]byte) ([]byte, error)
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// Check if the packet is IPv6
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if ipv6Header.Version != ipv6.Version {
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return nil, err
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return nil, errors.New("Ignoring non-IPv6 packet")
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}
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// Check if the packet is ICMPv6
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if ipv6Header.NextHeader != 58 {
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return nil, err
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return nil, errors.New("Ignoring non-ICMPv6 packet")
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}
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// Parse the ICMPv6 message contents
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@ -111,7 +111,7 @@ func (tun *TunAdapter) writer() error {
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}
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func (tun *TunAdapter) reader() error {
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recvd := make([]byte, 65535)
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recvd := make([]byte, 65535+tun_ETHER_HEADER_LENGTH)
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for {
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// Wait for a packet to be delivered to us through the TUN/TAP adapter
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n, err := tun.iface.Read(recvd)
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@ -134,17 +134,22 @@ func (tun *TunAdapter) reader() error {
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if len(recvd) <= offset {
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continue
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}
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// If we detect an ICMP packet then hand it to the ICMPv6 module
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if recvd[offset+6] == 58 {
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// Found an ICMPv6 packet
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b := make([]byte, n)
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copy(b, recvd)
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go tun.icmpv6.ParsePacket(b)
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}
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}
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// Offset the buffer from now on so that we can ignore ethernet frames if
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// they are present
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bs := recvd[offset:]
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bs := recvd[offset : offset+n]
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n -= offset
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// If we detect an ICMP packet then hand it to the ICMPv6 module
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if bs[6] == 58 {
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// Found an ICMPv6 packet - we need to make sure to give ICMPv6 the full
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// Ethernet frame rather than just the IPv6 packet as this is needed for
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// NDP to work correctly
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if err := tun.icmpv6.ParsePacket(recvd); err == nil {
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// We acted on the packet in the ICMPv6 module so don't forward or do
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// anything else with it
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continue
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}
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}
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// From the IP header, work out what our source and destination addresses
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// and node IDs are. We will need these in order to work out where to send
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// the packet
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@ -162,7 +167,7 @@ func (tun *TunAdapter) reader() error {
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continue
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}
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// Check the packet size
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if n != 256*int(bs[4])+int(bs[5])+offset+tun_IPv6_HEADER_LENGTH {
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if n-tun_IPv6_HEADER_LENGTH != 256*int(bs[4])+int(bs[5]) {
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continue
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}
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// IPv6 address
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@ -176,7 +181,7 @@ func (tun *TunAdapter) reader() error {
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continue
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}
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// Check the packet size
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if n != 256*int(bs[2])+int(bs[3])+offset {
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if n != 256*int(bs[2])+int(bs[3]) {
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continue
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}
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// IPv4 address
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@ -185,6 +190,7 @@ func (tun *TunAdapter) reader() error {
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copy(dstAddr[:addrlen], bs[16:])
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} else {
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// Unknown address length or protocol, so drop the packet and ignore it
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tun.log.Traceln("Unknown packet type, dropping")
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continue
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}
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if tun.ckr.isEnabled() && !tun.ckr.isValidSource(srcAddr, addrlen) {
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@ -71,6 +71,9 @@ func (tun *TunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int
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// Sets the MTU of the TAP adapter.
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func (tun *TunAdapter) setupMTU(mtu int) error {
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if tun.iface == nil || tun.iface.Name() == "" {
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return errors.New("Can't configure MTU as TAP adapter is not present")
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}
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// Set MTU
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cmd := exec.Command("netsh", "interface", "ipv6", "set", "subinterface",
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fmt.Sprintf("interface=%s", tun.iface.Name()),
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@ -88,6 +91,9 @@ func (tun *TunAdapter) setupMTU(mtu int) error {
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// Sets the IPv6 address of the TAP adapter.
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func (tun *TunAdapter) setupAddress(addr string) error {
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if tun.iface == nil || tun.iface.Name() == "" {
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return errors.New("Can't configure IPv6 address as TAP adapter is not present")
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}
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// Set address
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cmd := exec.Command("netsh", "interface", "ipv6", "add", "address",
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fmt.Sprintf("interface=%s", tun.iface.Name()),
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