Add e2e test cases for shadowsocks

tests/e2e/scripts/tcp_echo.py

@@ -0,0 +1,16 @@
+from http.server import BaseHTTPRequestHandler, HTTPServer
+
+
+class Handler(BaseHTTPRequestHandler):
+    def do_GET(self):
+        body = b"hello-gost"
+        self.send_response(200)
+        self.send_header("Content-Length", str(len(body)))
+        self.end_headers()
+        self.wfile.write(body)
+
+    def log_message(self, format, *args):
+        return
+
+
+HTTPServer(("0.0.0.0", 5678), Handler).serve_forever()

tests/e2e/scripts/udp_echo.py

@@ -0,0 +1,9 @@
+import socket
+
+
+sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+sock.bind(("0.0.0.0", 5679))
+
+while True:
+    data, addr = sock.recvfrom(2048)
+    sock.sendto(data, addr)