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use direct mode only when in the same private /16 network

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This commit is contained in:
braginini
2023-04-08 17:22:53 +02:00
parent b556736b31
commit db5f931373
1 changed files with 21 additions and 1 deletions
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22
client/internal/peer/conn.go
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@@ -340,13 +340,33 @@ func shouldUseProxy(pair *ice.CandidatePair, userspaceBind bool) bool {
return false
}
if isHostCandidateWithPrivateIP(pair.Local) && isHostCandidateWithPrivateIP(pair.Remote) {
if isHostCandidateWithPrivateIP(pair.Local) && isHostCandidateWithPrivateIP(pair.Remote) && isSameNetworkPrefix(pair) {
return false
}
return true
}
func isSameNetworkPrefix(pair *ice.CandidatePair) bool {
localIPStr, _, err := net.SplitHostPort(pair.Local.Address())
if err != nil {
return false
}
remoteIPStr, _, err := net.SplitHostPort(pair.Remote.Address())
if err != nil {
return false
}
localIP := net.ParseIP(localIPStr)
remoteIP := net.ParseIP(remoteIPStr)
if localIP == nil || remoteIP == nil {
return false
}
// only consider /16 networks
mask := net.IPMask{255, 255, 0, 0}
return localIP.Mask(mask).Equal(remoteIP.Mask(mask))
}
func isRelayCandidate(candidate ice.Candidate) bool {
return candidate.Type() == ice.CandidateTypeRelay
}