yggdrasil-network/yggdrasil-go
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fix merge conflict

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This commit is contained in:
Arceliar 2019-01-26 14:27:37 -06:00
commit 6ef0e47632
2 changed files with 29 additions and 11 deletions
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38
src/yggdrasil/session.go
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@ -554,17 +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 */
@ -612,5 +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?...
}
}