gvpe/src/conf.h

/*
    conf.h -- configuration database
    Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de>
 
    This file is part of GVPE.

    GVPE 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 3 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, see <http://www.gnu.org/licenses/>.
   
    Additional permission under GNU GPL version 3 section 7
   
    If you modify this Program, or any covered work, by linking or
    combining it with the OpenSSL project's OpenSSL library (or a modified
    version of that library), containing parts covered by the terms of the
    OpenSSL or SSLeay licenses, the licensors of this Program grant you
    additional permission to convey the resulting work.  Corresponding
    Source for a non-source form of such a combination shall include the
    source code for the parts of OpenSSL used as well as that of the
    covered work.
*/

#ifndef GVPE_CONF_H__
#define GVPE_CONF_H__

#include <vector>

#include <openssl/rsa.h>

#include "slog.h"
#include "global.h"

#define DEFAULT_REKEY                   3600
#define DEFAULT_KEEPALIVE               60      // one keepalive/minute (it's just 8 bytes...)
#define DEFAULT_UDPPORT                 655     // same as tinc, conflicts would be rare
#define DEFAULT_MTU                     1500    // let's ether-net
#define DEFAULT_MAX_RETRY               3600    // retry at least this often
#define DEFAULT_MAX_TTL                 60      // packets expire after this many seconds
#define DEFAULT_MAX_QUEUE               512     // never queue more than this many packets
 
#define DEFAULT_DNS_TIMEOUT_FACTOR      8.F     // initial retry timeout multiple
#define DEFAULT_DNS_SEND_INTERVAL       .01F    // minimum send interval
#define DEFAULT_DNS_OVERLAP_FACTOR      .5F     // RTT * LATENCY_FACTOR == sending rate
#define DEFAULT_DNS_MAX_OUTSTANDING     100     // max. number of outstanding requests

enum
{
  PROT_UDPv4  = 0x01, // udp over ipv4
  PROT_IPv4   = 0x02, // generic ip protocol
  PROT_TCPv4  = 0x04, // tcp over ipv4 (server)
  PROT_ICMPv4 = 0x08, // icmp over ipv4
  PROT_DNSv4  = 0x10, // dns tunnel ipv4 (server)
};

#define PROT_RELIABLE (PROT_TCPv4 | PROT_DNSv4)
#define PROT_SLOW     PROT_DNSv4

// select the "best" protocol of the available ones
u8 best_protocol (u8 protset);
const char *strprotocol (u8 protocol);

struct conf_node
{
  int id;         // the id of this node, a 12-bit-number

  RSA *rsa_key;   // his public key
  char *nodename; // nodename, an internal nickname.
  char *hostname; // hostname, if known, or NULL.
  char *if_up_data;
#if ENABLE_DNS
  char *domain;   // dns tunnel domain
#endif
  char *dns_hostname;
  u16 dns_port;

  u8 protocols;   // protocols this host can send & receive
  u16 udp_port, tcp_port;   // the port to bind to
  int max_retry;
  double max_ttl;   // packets expire after this many seconds
  int max_queue;    // maixmum send queue length

  enum connectmode { C_ONDEMAND, C_NEVER, C_ALWAYS, C_DISABLED } connectmode;
  bool compress;
  bool inherit_tos; // inherit TOS in packets send to this destination

  vector<const char *> allow_direct;
  vector<const char *> deny_direct;

  u32 routerprio;

  u8 connectable_protocols () const
  {
    u8 protocols = this->protocols;

    // mask out endpoints we can't connect to
    if (!udp_port) protocols &= ~PROT_UDPv4;
    if (!tcp_port) protocols &= ~PROT_TCPv4;
    if (!dns_port) protocols &= ~PROT_DNSv4;

    return protocols;
  }

  bool may_direct (struct conf_node *other);
  void finalise ();

  void print ();

  ~conf_node ();
};

struct configuration
{
  typedef vector<conf_node *> node_vector;
  node_vector nodes;
  conf_node default_node;
  conf_node *thisnode;
  int mtu;          // the mtu used for outgoing tunnel packets
  int nfmark;       // the SO_MARK // netfilter mark // fwmark
  double rekey;     // rekey interval
  double keepalive; // keepalive probes interval
  char *ifname;     // the interface name (tap0 ...)
  bool ifpersist;   // should the interface be persistent
  char *prikeyfile;
  RSA *rsa_key;     // our private rsa key
  loglevel llevel;
  u8 ip_proto;      // the ip protocol to use
#if ENABLE_ICMP
  u8 icmp_type;     // the icmp type for the icmp-protocol
#endif

  char *script_if_up;
  char *script_node_up;
  char *script_node_down;
  char *pidfilename;

#if ENABLE_HTTP_PROXY
  char *proxy_auth;     // login:password
  char *proxy_host;     // the proxy hostname, e.g. proxy1.example.net
  u16 proxy_port;       // the proxy port, e.g. 3128
#endif

#if ENABLE_DNS
  char *dns_forw_host;
  u16 dns_forw_port;
  float dns_timeout_factor;
  float dns_send_interval;
  float dns_overlap_factor;
  int dns_max_outstanding;
#endif

  void init ();
  void cleanup ();
  void clear ();

  // create a filename from string, replacing %s by the nodename
  // and using relative paths under confbase.
  char *config_filename (const char *name, const char *dflt);

  void print ();

  configuration ();
  ~configuration ();
};

struct configuration_parser
{
  configuration &conf;

  bool need_keys;
  conf_node *node;

  int argc;
  char **argv;

  configuration_parser (configuration &conf, bool need_keys, int argc, char **argv);

  const char *parse_line (char *line);
  void parse_argv ();
};

extern struct configuration conf;

#define THISNODE ::conf.thisnode

#endif

Revision:	1.36
Committed:	Mon Mar 23 15:22:00 2009 UTC (15 years, 2 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
Changes since 1.35:	+1 -0 lines
Log Message:	* empty log message *
#	Content
1	/*
2	conf.h -- configuration database
3	Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de>
4
5	This file is part of GVPE.
6
7	GVPE is free software; you can redistribute it and/or modify it
8	under the terms of the GNU General Public License as published by the
9	Free Software Foundation; either version 3 of the License, or (at your
10	option) any later version.
11
12	This program is distributed in the hope that it will be useful, but
13	WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
15	Public License for more details.
16
17	You should have received a copy of the GNU General Public License along
18	with this program; if not, see <http://www.gnu.org/licenses/>.
19
20	Additional permission under GNU GPL version 3 section 7
21
22	If you modify this Program, or any covered work, by linking or
23	combining it with the OpenSSL project's OpenSSL library (or a modified
24	version of that library), containing parts covered by the terms of the
25	OpenSSL or SSLeay licenses, the licensors of this Program grant you
26	additional permission to convey the resulting work. Corresponding
27	Source for a non-source form of such a combination shall include the
28	source code for the parts of OpenSSL used as well as that of the
29	covered work.
30	*/
31
32	#ifndef GVPE_CONF_H__
33	#define GVPE_CONF_H__
34
35	#include <vector>
36
37	#include <openssl/rsa.h>
38
39	#include "slog.h"
40	#include "global.h"
41
42	#define DEFAULT_REKEY 3600
43	#define DEFAULT_KEEPALIVE 60 // one keepalive/minute (it's just 8 bytes...)
44	#define DEFAULT_UDPPORT 655 // same as tinc, conflicts would be rare
45	#define DEFAULT_MTU 1500 // let's ether-net
46	#define DEFAULT_MAX_RETRY 3600 // retry at least this often
47	#define DEFAULT_MAX_TTL 60 // packets expire after this many seconds
48	#define DEFAULT_MAX_QUEUE 512 // never queue more than this many packets
49
50	#define DEFAULT_DNS_TIMEOUT_FACTOR 8.F // initial retry timeout multiple
51	#define DEFAULT_DNS_SEND_INTERVAL .01F // minimum send interval
52	#define DEFAULT_DNS_OVERLAP_FACTOR .5F // RTT * LATENCY_FACTOR == sending rate
53	#define DEFAULT_DNS_MAX_OUTSTANDING 100 // max. number of outstanding requests
54
55	enum
56	{
57	PROT_UDPv4 = 0x01, // udp over ipv4
58	PROT_IPv4 = 0x02, // generic ip protocol
59	PROT_TCPv4 = 0x04, // tcp over ipv4 (server)
60	PROT_ICMPv4 = 0x08, // icmp over ipv4
61	PROT_DNSv4 = 0x10, // dns tunnel ipv4 (server)
62	};
63
64	#define PROT_RELIABLE (PROT_TCPv4 \| PROT_DNSv4)
65	#define PROT_SLOW PROT_DNSv4
66
67	// select the "best" protocol of the available ones
68	u8 best_protocol (u8 protset);
69	const char *strprotocol (u8 protocol);
70
71	struct conf_node
72	{
73	int id; // the id of this node, a 12-bit-number
74
75	RSA *rsa_key; // his public key
76	char *nodename; // nodename, an internal nickname.
77	char *hostname; // hostname, if known, or NULL.
78	char *if_up_data;
79	#if ENABLE_DNS
80	char *domain; // dns tunnel domain
81	#endif
82	char *dns_hostname;
83	u16 dns_port;
84
85	u8 protocols; // protocols this host can send & receive
86	u16 udp_port, tcp_port; // the port to bind to
87	int max_retry;
88	double max_ttl; // packets expire after this many seconds
89	int max_queue; // maixmum send queue length
90
91	enum connectmode { C_ONDEMAND, C_NEVER, C_ALWAYS, C_DISABLED } connectmode;
92	bool compress;
93	bool inherit_tos; // inherit TOS in packets send to this destination
94
95	vector<const char *> allow_direct;
96	vector<const char *> deny_direct;
97
98	u32 routerprio;
99
100	u8 connectable_protocols () const
101	{
102	u8 protocols = this->protocols;
103
104	// mask out endpoints we can't connect to
105	if (!udp_port) protocols &= ~PROT_UDPv4;
106	if (!tcp_port) protocols &= ~PROT_TCPv4;
107	if (!dns_port) protocols &= ~PROT_DNSv4;
108
109	return protocols;
110	}
111
112	bool may_direct (struct conf_node *other);
113	void finalise ();
114
115	void print ();
116
117	~conf_node ();
118	};
119
120	struct configuration
121	{
122	typedef vector<conf_node *> node_vector;
123	node_vector nodes;
124	conf_node default_node;
125	conf_node *thisnode;
126	int mtu; // the mtu used for outgoing tunnel packets
127	int nfmark; // the SO_MARK // netfilter mark // fwmark
128	double rekey; // rekey interval
129	double keepalive; // keepalive probes interval
130	char *ifname; // the interface name (tap0 ...)
131	bool ifpersist; // should the interface be persistent
132	char *prikeyfile;
133	RSA *rsa_key; // our private rsa key
134	loglevel llevel;
135	u8 ip_proto; // the ip protocol to use
136	#if ENABLE_ICMP
137	u8 icmp_type; // the icmp type for the icmp-protocol
138	#endif
139
140	char *script_if_up;
141	char *script_node_up;
142	char *script_node_down;
143	char *pidfilename;
144
145	#if ENABLE_HTTP_PROXY
146	char *proxy_auth; // login:password
147	char *proxy_host; // the proxy hostname, e.g. proxy1.example.net
148	u16 proxy_port; // the proxy port, e.g. 3128
149	#endif
150
151	#if ENABLE_DNS
152	char *dns_forw_host;
153	u16 dns_forw_port;
154	float dns_timeout_factor;
155	float dns_send_interval;
156	float dns_overlap_factor;
157	int dns_max_outstanding;
158	#endif
159
160	void init ();
161	void cleanup ();
162	void clear ();
163
164	// create a filename from string, replacing %s by the nodename
165	// and using relative paths under confbase.
166	char config_filename (const char name, const char *dflt);
167
168	void print ();
169
170	configuration ();
171	~configuration ();
172	};
173
174	struct configuration_parser
175	{
176	configuration &conf;
177
178	bool need_keys;
179	conf_node *node;
180
181	int argc;
182	char **argv;
183
184	configuration_parser (configuration &conf, bool need_keys, int argc, char **argv);
185
186	const char parse_line (char line);
187	void parse_argv ();
188	};
189
190	extern struct configuration conf;
191
192	#define THISNODE ::conf.thisnode
193
194	#endif
195