yggdrasil-network/yggdrasil-go
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Varying connection check strictness based on scope

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This commit is contained in:
Neil Alexander 2022-10-22 17:45:09 +01:00
parent 8fe1c41295
commit 35ea66d651
2 changed files with 31 additions and 16 deletions
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30
src/core/link_tcp.go
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@ -35,14 +35,14 @@ func (l *linkTCP) dial(url *url.URL, options linkOptions, sintf string) error {
if err != nil {
return err
}
info := linkInfoFor("tcp", sintf, addr.String())
if l.links.isConnectedTo(info) {
return nil
}
dialer, err := l.dialerFor(addr, sintf)
if err != nil {
return err
}
info := linkInfoFor("tcp", sintf, tcpIDFor(dialer.LocalAddr, addr))
if l.links.isConnectedTo(info) {
return nil
}
conn, err := dialer.DialContext(l.core.ctx, "tcp", addr.String())
if err != nil {
return err
@ -82,10 +82,11 @@ func (l *linkTCP) listen(url *url.URL, sintf string) (*Listener, error) {
cancel()
break
}
addr := conn.RemoteAddr().(*net.TCPAddr)
name := fmt.Sprintf("tcp://%s", addr)
info := linkInfoFor("tcp", sintf, addr.String())
if err = l.handler(name, info, conn, linkOptions{}, true, addr.IP.IsLinkLocalUnicast()); err != nil {
laddr := conn.LocalAddr().(*net.TCPAddr)
raddr := conn.RemoteAddr().(*net.TCPAddr)
name := fmt.Sprintf("tcp://%s", raddr)
info := linkInfoFor("tcp", sintf, tcpIDFor(laddr, raddr))
if err = l.handler(name, info, conn, linkOptions{}, true, raddr.IP.IsLinkLocalUnicast()); err != nil {
l.core.log.Errorln("Failed to create inbound link:", err)
}
}
@ -179,3 +180,16 @@ func (l *linkTCP) dialerFor(dst *net.TCPAddr, sintf string) (*net.Dialer, error)
}
return dialer, nil
}
func tcpIDFor(local net.Addr, remoteAddr *net.TCPAddr) string {
if localAddr, ok := local.(*net.TCPAddr); ok && localAddr.IP.Equal(remoteAddr.IP) {
// Nodes running on the same host — include both the IP and port.
return remoteAddr.String()
}
if remoteAddr.IP.IsLinkLocalUnicast() {
// Nodes discovered via multicast — include the IP only.
return remoteAddr.IP.String()
}
// Nodes connected remotely — include both the IP and port.
return remoteAddr.String()
}