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wgengine/netstack: log ForwarderRequest in readable form, only in debug mode (#1758)

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* wgengine/netstack: log ForwarderRequest in readable form, only in debug mode

Fixes #1757

Signed-off-by: Naman Sood <mail@nsood.in>
This commit is contained in:
Naman Sood 2021-04-21 14:50:48 -04:00 committed by GitHub
parent 07c95a0219
commit 4a90a91d29
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 13 additions and 6 deletions
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19
wgengine/netstack/netstack.go
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@ -393,12 +393,10 @@ func (ns *Impl) injectInbound(p *packet.Parsed, t *tstun.Wrapper) filter.Respons
}
func (ns *Impl) acceptTCP(r *tcp.ForwarderRequest) {
if debugNetstack {
// Kinda ugly:
// ForwarderRequest: &{{{{0 0}}} 0xc0001c30b0 0xc0004c3d40 {1240 6 true 826109390 0 true}
ns.logf("[v2] ForwarderRequest: %v", r)
}
reqDetails := r.ID()
if debugNetstack {
ns.logf("[v2] TCP ForwarderRequest: %s", stringifyTEI(reqDetails))
}
dialAddr := reqDetails.LocalAddress
dialNetAddr, _ := netaddr.FromStdIP(net.IP(dialAddr))
isTailscaleIP := tsaddr.IsTailscaleIP(dialNetAddr)
@ -472,7 +470,10 @@ func (ns *Impl) forwardTCP(client *gonet.TCPConn, wq *waiter.Queue, dialAddr tcp
}
func (ns *Impl) acceptUDP(r *udp.ForwarderRequest) {
ns.logf("[v2] UDP ForwarderRequest: %v", r)
reqDetails := r.ID()
if debugNetstack {
ns.logf("[v2] UDP ForwarderRequest: %v", stringifyTEI(reqDetails))
}
var wq waiter.Queue
ep, err := r.CreateEndpoint(&wq)
if err != nil {
@ -563,3 +564,9 @@ func startPacketCopy(ctx context.Context, cancel context.CancelFunc, dst net.Pac
}
}()
}
func stringifyTEI(tei stack.TransportEndpointID) string {
localHostPort := net.JoinHostPort(tei.LocalAddress.String(), strconv.Itoa(int(tei.LocalPort)))
remoteHostPort := net.JoinHostPort(tei.RemoteAddress.String(), strconv.Itoa(int(tei.RemotePort)))
return fmt.Sprintf("%s -> %s", remoteHostPort, localHostPort)
}