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[vsorcdistro/.git] / ryu / build / lib.linux-armv7l-2.7 / ryu / lib / sockopt.py

diff --git a/ryu/build/lib.linux-armv7l-2.7/ryu/lib/sockopt.py b/ryu/build/lib.linux-armv7l-2.7/ryu/lib/sockopt.py
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+# Copyright (C) 2014 Nippon Telegraph and Telephone Corporation.
+# Copyright (C) 2014 YAMAMOTO Takashi <yamamoto at valinux co jp>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import platform
+import socket
+import struct
+
+from ryu.lib import sockaddr
+
+
+TCP_MD5SIG_LINUX = 0x0e
+TCP_MD5SIG_BSD = 0x10
+
+
+def _set_tcp_md5sig_linux(s, addr, key):
+    # struct tcp_md5sig {
+    #     struct sockaddr_storage addr;
+    #     u16 pad1;
+    #     u16 keylen;
+    #     u32 pad2;
+    #     u8 key[80];
+    # }
+    af = s.family
+    if af == socket.AF_INET:
+        sa = sockaddr.sa_in4(addr)
+    elif af == socket.AF_INET6:
+        sa = sockaddr.sa_in6(addr)
+    else:
+        raise ValueError("unsupported af %s" % (af,))
+    ss = sockaddr.sa_to_ss(sa)
+    tcp_md5sig = ss + struct.pack("2xH4x80s", len(key), key)
+    s.setsockopt(socket.IPPROTO_TCP, TCP_MD5SIG_LINUX, tcp_md5sig)
+
+
+def _set_tcp_md5sig_bsd(s, _addr, _key):
+    # NOTE: On this platform, address and key need to be set using setkey(8).
+    tcp_md5sig = struct.pack("I", 1)
+    s.setsockopt(socket.IPPROTO_TCP, TCP_MD5SIG_BSD, tcp_md5sig)
+
+
+def set_tcp_md5sig(s, addr, key):
+    """Enable TCP-MD5 on the given socket.
+
+    :param s: Socket
+    :param addr: Associated address.  On some platforms, this has no effect.
+    :param key: Key.  On some platforms, this has no effect.
+    """
+    impls = {
+        'FreeBSD': _set_tcp_md5sig_bsd,
+        'Linux': _set_tcp_md5sig_linux,
+        'NetBSD': _set_tcp_md5sig_bsd,
+    }
+    system = platform.system()
+    try:
+        impl = impls[system]
+    except KeyError:
+        raise NotImplementedError("TCP-MD5 unsupported on this platform")
+    impl(s, addr, key)