Security-55163.44.tar.gz

[apple/security.git] / libsecurity_utilities / lib / socks++5.h

diff --git a/libsecurity_utilities/lib/socks++5.h b/libsecurity_utilities/lib/socks++5.h
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+/*
+ * Copyright (c) 2000-2001,2004 Apple Computer, Inc. All Rights Reserved.
+ * 
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+
+//
+// socks++5 - version 5 Socks protocol
+//
+#ifndef _H_SOCKSPLUSPLUS5
+#define _H_SOCKSPLUSPLUS5
+
+#include "socks++.h"
+
+
+namespace Security {
+namespace IPPlusPlus {
+namespace Socks5 {
+
+
+typedef unsigned char Byte;
+
+
+class Server : public SocksServer {
+public:
+    Server(const IPSockAddress &s) : SocksServer(5, s) { }
+    
+    virtual void connect(SocksClientSocket &me, const IPSockAddress &peer);
+    virtual void connect(SocksClientSocket &me, const Host &host, IPPort port);
+    virtual void bind(SocksServerSocket &me, const IPAddress &peer, IPPort port);
+    virtual void receive(SocksServerSocket &me, SocksClientSocket &receiver);
+    
+private:
+    void open(Socket &s, Support &me);
+};
+
+
+// request code (message field outbound)
+enum Command {
+    socksConnect = 1,                                  // connect (outbound)
+    socksBind = 2,                                             // bind (single inbound)
+    socksUDP = 3                                               // UDP associate (not implemented)
+};
+
+// reply code (message field inbound)
+enum SocksReply {
+    socksSuccess = 0,
+    socksFailed = 1,
+    socksDenied = 2,
+    socksNetUnreach = 3,
+    socksHostUnreach = 4,
+    socksConRefused = 5,
+    socksTTLExpired = 6,
+    socksUnsupported = 7,
+    socksAddressNotSupported = 8
+};
+
+// authentication type (in setup request)
+enum AuthenticationType {
+    socksAuthPublic = 0,                               // anonymous access
+    socksAuthGSSAPI = 1,                               // GSSAPI (yuk)
+    socksAuthUsername = 2,                             // username/password
+    socksAuthNoneAcceptable = 0xff             // can't help you there...
+};
+
+// address types (inbound/outbound)
+enum AddressType {
+    socksIPv4 = 1,
+    socksName = 3,
+    socksIPv6 = 4
+};
+
+
+//
+// A Message object contains a single request or reply of the Socks5 protocol.
+// Since some of the data is dynamically sized, we have to fudge a bit. The static
+// layout corresponds to IPv4 addresses, the common case. The object itself is big
+// enough for all cases.
+//
+struct Message {
+    Byte version;                      // Socks version
+    Byte message;                      // message/reply
+    Byte reserved;                     // not used (zero)
+    Byte addressType;          // address type
+    IPAddress addr;                    // address starts here (IPv4 case)
+    // following fields dynamically located if (addressType != socksIPv4)
+    IPPort port;                       // port field IF addr is IPv4
+    Byte pad[256-sizeof(IPAddress)-sizeof(IPPort)]; // enough room for type 3 addresses (256 bytes)
+
+    // the following fields are not part of the message data
+    size_t length;                     // calculated length of message (bytes, starting at version)
+    
+    Message(Command cmd, IPAddress addr, IPPort port); // type 1 request
+    Message(Command cmd, const char *hostname, IPPort port); // type 3 request
+    void send(Socket &s);      // send request
+
+    Message(Socket &socket); // receive (type 1 only)
+    
+    IPSockAddress address() const      { return IPSockAddress(addr, ntohs(port)); }
+};
+
+
+}      // end namespace Socks
+}      // end namespace IPPlusPlus
+}      // end namespace Security
+
+#endif //_H_SOCKSPLUSPLUS5