yggdrasil-network/yggdrasil-go
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Update water go.mod references, fix some bugs in TAP mode (which should hopefully fix Windows support too)

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This commit is contained in:
Neil Alexander 2019-07-20 16:13:54 +01:00
parent 36201895e7
commit 48ad3c5d7f
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GPG key ID: A02A2019A2BB0944
5 changed files with 33 additions and 18 deletions
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28
src/tuntap/iface.go
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@ -111,7 +111,7 @@ func (tun *TunAdapter) writer() error {
}
func (tun *TunAdapter) reader() error {
recvd := make([]byte, 65535)
recvd := make([]byte, 65535+tun_ETHER_HEADER_LENGTH)
for {
// Wait for a packet to be delivered to us through the TUN/TAP adapter
n, err := tun.iface.Read(recvd)
@ -134,17 +134,22 @@ func (tun *TunAdapter) reader() error {
if len(recvd) <= offset {
continue
}
// If we detect an ICMP packet then hand it to the ICMPv6 module
if recvd[offset+6] == 58 {
// Found an ICMPv6 packet
b := make([]byte, n)
copy(b, recvd)
go tun.icmpv6.ParsePacket(b)
}
}
// Offset the buffer from now on so that we can ignore ethernet frames if
// they are present
bs := recvd[offset:]
bs := recvd[offset : offset+n]
n -= offset
// If we detect an ICMP packet then hand it to the ICMPv6 module
if bs[6] == 58 {
// Found an ICMPv6 packet - we need to make sure to give ICMPv6 the full
// Ethernet frame rather than just the IPv6 packet as this is needed for
// NDP to work correctly
if err := tun.icmpv6.ParsePacket(recvd); err == nil {
// We acted on the packet in the ICMPv6 module so don't forward or do
// anything else with it
continue
}
}
// From the IP header, work out what our source and destination addresses
// and node IDs are. We will need these in order to work out where to send
// the packet
@ -162,7 +167,7 @@ func (tun *TunAdapter) reader() error {
continue
}
// Check the packet size
if n != 256*int(bs[4])+int(bs[5])+offset+tun_IPv6_HEADER_LENGTH {
if n-tun_IPv6_HEADER_LENGTH != 256*int(bs[4])+int(bs[5]) {
continue
}
// IPv6 address
@ -176,7 +181,7 @@ func (tun *TunAdapter) reader() error {
continue
}
// Check the packet size
if n != 256*int(bs[2])+int(bs[3])+offset {
if n != 256*int(bs[2])+int(bs[3]) {
continue
}
// IPv4 address
@ -185,6 +190,7 @@ func (tun *TunAdapter) reader() error {
copy(dstAddr[:addrlen], bs[16:])
} else {
// Unknown address length or protocol, so drop the packet and ignore it
tun.log.Traceln("Unknown packet type, dropping")
continue
}
if tun.ckr.isEnabled() && !tun.ckr.isValidSource(srcAddr, addrlen) {