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don't allow ygg tcp connections to/from a local ygg address

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This commit is contained in:
Arceliar 2020-05-25 19:08:04 -05:00
parent 45810fa184
commit 8345ae1fa3
1 changed files with 13 additions and 0 deletions
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13
src/yggdrasil/tcp.go
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@ -25,6 +25,7 @@ import (
"golang.org/x/net/proxy"
"github.com/yggdrasil-network/yggdrasil-go/src/address"
"github.com/yggdrasil-network/yggdrasil-go/src/util"
)
@ -397,6 +398,18 @@ func (t *tcp) handler(sock net.Conn, incoming bool, options tcpOptions) {
local, _, _ = net.SplitHostPort(sock.LocalAddr().String())
remote, _, _ = net.SplitHostPort(sock.RemoteAddr().String())
}
localIP := net.ParseIP(local)
if localIP = localIP.To16(); localIP != nil {
var laddr address.Address
var lsubnet address.Subnet
copy(laddr[:], localIP)
copy(lsubnet[:], localIP)
if laddr.IsValid() || lsubnet.IsValid() {
// The local address is with the network address/prefix range
// This would route ygg over ygg, which we don't want
return
}
}
force := net.ParseIP(strings.Split(remote, "%")[0]).IsLinkLocalUnicast()
link, err := t.link.core.link.create(&stream, name, proto, local, remote, incoming, force, options.linkOptions)
if err != nil {