gvpe/src/protocol.h

/*
    protocol.h -- header for protocol.C
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#ifndef VPE_PROTOCOL_H__
#define VPE_PROTOCOL_H__

#include <netinet/in.h>
#include <netinet/ip.h> // for tos etc.

#include <openssl/evp.h>
#include <openssl/rsa.h>

#include "conf.h"
#include "iom.h"
#include "util.h"
#include "device.h"

/* Protocol version. Different versions are incompatible,
   incompatible version have different protocols.
 */

#define PROTOCOL_MAJOR 1
#define PROTOCOL_MINOR 0

struct vpn;
struct vpn_packet;

struct rsaid {
  u8 id[RSA_IDLEN]; // the challenge id
};

typedef u8 rsachallenge[RSA_KEYLEN - RSA_OVERHEAD]; // challenge data;
typedef u8 rsaencrdata[RSA_KEYLEN]; // encrypted challenge
typedef u8 rsaresponse[RSA_HASHLEN]; // the ripemd160(!) hash of the challenge

struct crypto_ctx;

// a very simple fifo pkt-queue
class pkt_queue
  {
    tap_packet *queue[QUEUEDEPTH];
    int i, j;

  public:

    void put (tap_packet *p);
    tap_packet *get ();

    pkt_queue ();
    ~pkt_queue ();
  };

struct connection
  {
    conf_node *conf;
    struct vpn *vpn;

    SOCKADDR sa; // the current(!) destination ip to send packets to
    int retry_cnt;

    tstamp last_activity;       // time of last packet received

    u32 oseqno;
    sliding_window iseqno;

    pkt_queue queue;

    crypto_ctx *octx, *ictx;

    enum conf_node::connectmode connectmode;

    void reset_dstaddr ();

    void shutdown ();
    void reset_connection ();
    void establish_connection_cb (tstamp &ts); time_watcher establish_connection;
    void rekey_cb (tstamp &ts); time_watcher rekey; // next rekying (actually current reset + reestablishing)
    void keepalive_cb (tstamp &ts); time_watcher keepalive; // next keepalive probe

    void send_auth_request (SOCKADDR *sa, bool initiate);
    void send_auth_response (SOCKADDR *sa, const rsaid &id, const rsachallenge &chg);
    void send_reset (SOCKADDR *dsa);
    void send_ping (SOCKADDR *dss, u8 pong = 0);
    void send_data_packet (tap_packet *pkt, bool broadcast = false);
    void inject_data_packet (tap_packet *pkt, bool broadcast = false);
    void connect_request (int id);

    void recv_vpn_packet (vpn_packet *pkt, SOCKADDR *rsa);

    void script_node ();
    const char *script_node_up (int);
    const char *script_node_down (int);

    connection(struct vpn *vpn_);
    ~connection ();
  };

struct vpn
  {
    int socket_fd;
    int events;

    enum {
      EVENT_RECONNECT = 1,
      EVENT_SHUTDOWN  = 2,
    };

    void event_cb (tstamp &ts); time_watcher event;

    tap_device *tap;

    typedef vector<connection *> conns_vector;
    conns_vector conns;

    connection *find_router ();

    void send_vpn_packet (vpn_packet *pkt, SOCKADDR *sa, int tos = IPTOS_RELIABILITY);
    void reconnect_all ();
    void shutdown_all ();
    void connect_request (int id);

    void vpn_ev (short revents); io_watcher vpn_ev_watcher;
    void udp_ev (short revents); io_watcher udp_ev_watcher;

    vpn ();
    ~vpn ();

    int setup ();

    const char *script_if_up (int);
  };

#endif

Revision:	1.8
Committed:	Wed Mar 26 01:58:46 2003 UTC (21 years, 2 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
Changes since 1.7:	+13 -12 lines
Log Message:	* empty log message *
#	Content
1	/*
2	protocol.h -- header for protocol.C
3
4	This program is free software; you can redistribute it and/or modify
5	it under the terms of the GNU General Public License as published by
6	the Free Software Foundation; either version 2 of the License, or
7	(at your option) any later version.
8
9	This program is distributed in the hope that it will be useful,
10	but WITHOUT ANY WARRANTY; without even the implied warranty of
11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12	GNU General Public License for more details.
13
14	You should have received a copy of the GNU General Public License
15	along with this program; if not, write to the Free Software
16	Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17	*/
18
19	#ifndef VPE_PROTOCOL_H__
20	#define VPE_PROTOCOL_H__
21
22	#include <netinet/in.h>
23	#include <netinet/ip.h> // for tos etc.
24
25	#include <openssl/evp.h>
26	#include <openssl/rsa.h>
27
28	#include "conf.h"
29	#include "iom.h"
30	#include "util.h"
31	#include "device.h"
32
33	/* Protocol version. Different versions are incompatible,
34	incompatible version have different protocols.
35	*/
36
37	#define PROTOCOL_MAJOR 1
38	#define PROTOCOL_MINOR 0
39
40	struct vpn;
41	struct vpn_packet;
42
43	struct rsaid {
44	u8 id[RSA_IDLEN]; // the challenge id
45	};
46
47	typedef u8 rsachallenge[RSA_KEYLEN - RSA_OVERHEAD]; // challenge data;
48	typedef u8 rsaencrdata[RSA_KEYLEN]; // encrypted challenge
49	typedef u8 rsaresponse[RSA_HASHLEN]; // the ripemd160(!) hash of the challenge
50
51	struct crypto_ctx;
52
53	// a very simple fifo pkt-queue
54	class pkt_queue
55	{
56	tap_packet *queue[QUEUEDEPTH];
57	int i, j;
58
59	public:
60
61	void put (tap_packet *p);
62	tap_packet *get ();
63
64	pkt_queue ();
65	~pkt_queue ();
66	};
67
68	struct connection
69	{
70	conf_node *conf;
71	struct vpn *vpn;
72
73	SOCKADDR sa; // the current(!) destination ip to send packets to
74	int retry_cnt;
75
76	tstamp last_activity; // time of last packet received
77
78	u32 oseqno;
79	sliding_window iseqno;
80
81	pkt_queue queue;
82
83	crypto_ctx octx, ictx;
84
85	enum conf_node::connectmode connectmode;
86
87	void reset_dstaddr ();
88
89	void shutdown ();
90	void reset_connection ();
91	void establish_connection_cb (tstamp &ts); time_watcher establish_connection;
92	void rekey_cb (tstamp &ts); time_watcher rekey; // next rekying (actually current reset + reestablishing)
93	void keepalive_cb (tstamp &ts); time_watcher keepalive; // next keepalive probe
94
95	void send_auth_request (SOCKADDR *sa, bool initiate);
96	void send_auth_response (SOCKADDR *sa, const rsaid &id, const rsachallenge &chg);
97	void send_reset (SOCKADDR *dsa);
98	void send_ping (SOCKADDR *dss, u8 pong = 0);
99	void send_data_packet (tap_packet *pkt, bool broadcast = false);
100	void inject_data_packet (tap_packet *pkt, bool broadcast = false);
101	void connect_request (int id);
102
103	void recv_vpn_packet (vpn_packet pkt, SOCKADDR rsa);
104
105	void script_node ();
106	const char *script_node_up (int);
107	const char *script_node_down (int);
108
109	connection(struct vpn *vpn_);
110	~connection ();
111	};
112
113	struct vpn
114	{
115	int socket_fd;
116	int events;
117
118	enum {
119	EVENT_RECONNECT = 1,
120	EVENT_SHUTDOWN = 2,
121	};
122
123	void event_cb (tstamp &ts); time_watcher event;
124
125	tap_device *tap;
126
127	typedef vector<connection *> conns_vector;
128	conns_vector conns;
129
130	connection *find_router ();
131
132	void send_vpn_packet (vpn_packet pkt, SOCKADDR sa, int tos = IPTOS_RELIABILITY);
133	void reconnect_all ();
134	void shutdown_all ();
135	void connect_request (int id);
136
137	void vpn_ev (short revents); io_watcher vpn_ev_watcher;
138	void udp_ev (short revents); io_watcher udp_ev_watcher;
139
140	vpn ();
141	~vpn ();
142
143	int setup ();
144
145	const char *script_if_up (int);
146	};
147
148	#endif
149