Add abstract base class TcpSocket

src/node/wscript

@@ -27,6 +27,7 @@ def build(bld):
         'packet-socket.cc',
         'udp-socket.cc',
         'udp-socket-factory.cc',
+        'tcp-socket.cc',
         'tcp-socket-factory.cc',
         'ipv4.cc',
         'application.cc',
@@ -60,6 +61,7 @@ def build(bld):
         'packet-socket-factory.h',
         'udp-socket.h',
         'udp-socket-factory.h',
+        'tcp-socket.h',
         'tcp-socket-factory.h',
         'ipv4.h',
         'application.h',