mirror of
https://github.com/cwinfo/yggdrasil-go.git
synced 2024-11-12 23:20:28 +00:00
remove duplicate tcp connections
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parent
25f00c1c7a
commit
8ba11b86bb
@ -23,11 +23,14 @@ type tcpInterface struct {
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serv *net.TCPListener
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mutex sync.Mutex // Protecting the below
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calls map[string]struct{}
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conns map[tcpInfo](chan struct{})
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}
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type tcpKeys struct {
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box boxPubKey
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sig sigPubKey
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type tcpInfo struct {
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box boxPubKey
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sig sigPubKey
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localAddr string // net.IPAddr.String(), not TCPAddr, don't care about port
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remoteAddr string
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}
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func (iface *tcpInterface) init(core *Core, addr string) {
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@ -41,6 +44,7 @@ func (iface *tcpInterface) init(core *Core, addr string) {
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panic(err)
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}
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iface.calls = make(map[string]struct{})
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iface.conns = make(map[tcpInfo](chan struct{}))
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go iface.listener()
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}
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@ -102,8 +106,8 @@ func (iface *tcpInterface) handler(sock *net.TCPConn) {
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if n < len(keys) { /*panic("Partial key packet?") ;*/
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return
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}
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ks := tcpKeys{}
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if !tcp_chop_keys(&ks.box, &ks.sig, &keys) { /*panic("Invalid key packet?") ;*/
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info := tcpInfo{}
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if !tcp_chop_keys(&info.box, &info.sig, &keys) { /*panic("Invalid key packet?") ;*/
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return
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}
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// Quit the parent call if this is a connection to ourself
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@ -115,16 +119,40 @@ func (iface *tcpInterface) handler(sock *net.TCPConn) {
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}
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return true
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}
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if equiv(ks.box[:], iface.core.boxPub[:]) {
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if equiv(info.box[:], iface.core.boxPub[:]) {
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return
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} // testing
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if equiv(ks.sig[:], iface.core.sigPub[:]) {
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if equiv(info.sig[:], iface.core.sigPub[:]) {
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return
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}
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// Check if we already have a connection to this node, close and block if yes
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local := sock.LocalAddr().(*net.TCPAddr)
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laddr := net.IPAddr{
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IP: local.IP,
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Zone: local.Zone,
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}
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info.localAddr = laddr.String()
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remote := sock.RemoteAddr().(*net.TCPAddr)
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raddr := net.IPAddr{
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IP: remote.IP,
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Zone: remote.Zone,
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}
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info.remoteAddr = raddr.String()
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iface.mutex.Lock()
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if blockChan, isIn := iface.conns[info]; isIn {
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iface.mutex.Unlock()
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sock.Close()
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<-blockChan
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return
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}
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blockChan := make(chan struct{})
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iface.conns[info] = blockChan
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iface.mutex.Unlock()
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defer close(blockChan)
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// Note that multiple connections to the same node are allowed
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// E.g. over different interfaces
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linkIn := make(chan []byte, 1)
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p := iface.core.peers.newPeer(&ks.box, &ks.sig) //, in, out)
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p := iface.core.peers.newPeer(&info.box, &info.sig) //, in, out)
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in := func(bs []byte) {
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p.handlePacket(bs, linkIn)
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}
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@ -197,8 +225,8 @@ func (iface *tcpInterface) handler(sock *net.TCPConn) {
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p.core.peers.mutex.Unlock()
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close(linkIn)
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}()
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them := sock.RemoteAddr()
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themNodeID := getNodeID(&ks.box)
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them := sock.RemoteAddr().(*net.TCPAddr)
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themNodeID := getNodeID(&info.box)
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themAddr := address_addrForNodeID(themNodeID)
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themAddrString := net.IP(themAddr[:]).String()
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themString := fmt.Sprintf("%s@%s", themAddrString, them)
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