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)
  PROT_IPv42  = 0x20, // temporary hack to invetsigate packet loss
  PROT_EMPTY  = 0x00  // not used
};

#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 1//D2
  u8 ip2_proto;      // the ip protocol to use
#endif
#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_change;
  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;
  bool dns_case_preserving;
  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 = 0);

  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);

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

extern struct configuration conf;

#define THISNODE ::conf.thisnode

#endif

Revision:	1.39
Committed:	Sat Dec 17 22:05:34 2011 UTC (12 years, 5 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.38:	+5 -0 lines
Log Message:	ipv42_hack
#	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	PROT_IPv42 = 0x20, // temporary hack to invetsigate packet loss
63	PROT_EMPTY = 0x00 // not used
64	};
65
66	#define PROT_RELIABLE (PROT_TCPv4 \| PROT_DNSv4)
67	#define PROT_SLOW PROT_DNSv4
68
69	// select the "best" protocol of the available ones
70	u8 best_protocol (u8 protset);
71	const char *strprotocol (u8 protocol);
72
73	struct conf_node
74	{
75	int id; // the id of this node, a 12-bit-number
76
77	RSA *rsa_key; // his public key
78	char *nodename; // nodename, an internal nickname.
79	char *hostname; // hostname, if known, or NULL.
80	char *if_up_data;
81	#if ENABLE_DNS
82	char *domain; // dns tunnel domain
83	#endif
84	char *dns_hostname;
85	u16 dns_port;
86
87	u8 protocols; // protocols this host can send & receive
88	u16 udp_port, tcp_port; // the port to bind to
89	int max_retry;
90	double max_ttl; // packets expire after this many seconds
91	int max_queue; // maixmum send queue length
92
93	enum connectmode { C_ONDEMAND, C_NEVER, C_ALWAYS, C_DISABLED } connectmode;
94	bool compress;
95	bool inherit_tos; // inherit TOS in packets send to this destination
96
97	vector<const char *> allow_direct;
98	vector<const char *> deny_direct;
99
100	u32 routerprio;
101
102	u8 connectable_protocols () const
103	{
104	u8 protocols = this->protocols;
105
106	// mask out endpoints we can't connect to
107	if (!udp_port) protocols &= ~PROT_UDPv4;
108	if (!tcp_port) protocols &= ~PROT_TCPv4;
109	if (!dns_port) protocols &= ~PROT_DNSv4;
110
111	return protocols;
112	}
113
114	bool may_direct (struct conf_node *other);
115	void finalise ();
116
117	void print ();
118
119	~conf_node ();
120	};
121
122	struct configuration
123	{
124	typedef vector<conf_node *> node_vector;
125	node_vector nodes;
126	conf_node default_node;
127	conf_node *thisnode;
128	int mtu; // the mtu used for outgoing tunnel packets
129	int nfmark; // the SO_MARK // netfilter mark // fwmark
130	double rekey; // rekey interval
131	double keepalive; // keepalive probes interval
132	char *ifname; // the interface name (tap0 ...)
133	bool ifpersist; // should the interface be persistent
134	char *prikeyfile;
135	RSA *rsa_key; // our private rsa key
136	loglevel llevel;
137	u8 ip_proto; // the ip protocol to use
138	#if 1//D2
139	u8 ip2_proto; // the ip protocol to use
140	#endif
141	#if ENABLE_ICMP
142	u8 icmp_type; // the icmp type for the icmp-protocol
143	#endif
144
145	char *script_if_up;
146	char *script_node_up;
147	char *script_node_change;
148	char *script_node_down;
149	char *pidfilename;
150
151	#if ENABLE_HTTP_PROXY
152	char *proxy_auth; // login:password
153	char *proxy_host; // the proxy hostname, e.g. proxy1.example.net
154	u16 proxy_port; // the proxy port, e.g. 3128
155	#endif
156
157	#if ENABLE_DNS
158	char *dns_forw_host;
159	bool dns_case_preserving;
160	u16 dns_forw_port;
161	float dns_timeout_factor;
162	float dns_send_interval;
163	float dns_overlap_factor;
164	int dns_max_outstanding;
165	#endif
166
167	void init ();
168	void cleanup ();
169	void clear ();
170
171	// create a filename from string, replacing %s by the nodename
172	// and using relative paths under confbase.
173	char config_filename (const char name, const char *dflt = 0);
174
175	void print ();
176
177	configuration ();
178	~configuration ();
179	};
180
181	struct configuration_parser
182	{
183	configuration &conf;
184
185	bool need_keys;
186	conf_node *node;
187
188	int argc;
189	char **argv;
190
191	configuration_parser (configuration &conf, bool need_keys, int argc, char **argv);
192
193	void parse_file (const char *fname);
194	const char parse_line (char line);
195	void parse_argv ();
196	};
197
198	extern struct configuration conf;
199
200	#define THISNODE ::conf.thisnode
201
202	#endif
203