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                   3607    // interval between rekeys
#define DEFAULT_RESEED                  3613    // interval between rng reseeds
#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_ALL    = 0x1f
};

#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;
  char *seed_dev;   // the randomd evice to use for seeding
  double reseed;    // the interval between additional seeds
  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
  uid_t change_uid; // the uid of the user to switch to, or 0
  gid_t change_gid; // the gid of the user to switch to, or 0
  char *change_root;// the path to chroot to, "/" == anonymous
#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 ();

  conf_node *find_node (const char *name);

  // 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:	1.44
Committed:	Wed Jul 17 16:40:57 2013 UTC (10 years, 10 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.43:	+2 -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 3607 // interval between rekeys
43	#define DEFAULT_RESEED 3613 // interval between rng reseeds
44	#define DEFAULT_KEEPALIVE 60 // one keepalive/minute (it's just 8 bytes...)
45	#define DEFAULT_UDPPORT 655 // same as tinc, conflicts would be rare
46	#define DEFAULT_MTU 1500 // let's ether-net
47	#define DEFAULT_MAX_RETRY 3600 // retry at least this often
48	#define DEFAULT_MAX_TTL 60 // packets expire after this many seconds
49	#define DEFAULT_MAX_QUEUE 512 // never queue more than this many packets
50
51	#define DEFAULT_DNS_TIMEOUT_FACTOR 8.F // initial retry timeout multiple
52	#define DEFAULT_DNS_SEND_INTERVAL .01F // minimum send interval
53	#define DEFAULT_DNS_OVERLAP_FACTOR .5F // RTT * LATENCY_FACTOR == sending rate
54	#define DEFAULT_DNS_MAX_OUTSTANDING 100 // max. number of outstanding requests
55
56	enum
57	{
58	PROT_UDPv4 = 0x01, // udp over ipv4
59	PROT_IPv4 = 0x02, // generic ip protocol
60	PROT_TCPv4 = 0x04, // tcp over ipv4 (server)
61	PROT_ICMPv4 = 0x08, // icmp over ipv4
62	PROT_DNSv4 = 0x10, // dns tunnel ipv4 (server)
63	PROT_ALL = 0x1f
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	char *seed_dev; // the randomd evice to use for seeding
129	double reseed; // the interval between additional seeds
130	int mtu; // the mtu used for outgoing tunnel packets
131	int nfmark; // the SO_MARK // netfilter mark // fwmark
132	double rekey; // rekey interval
133	double keepalive; // keepalive probes interval
134	char *ifname; // the interface name (tap0 ...)
135	bool ifpersist; // should the interface be persistent
136	char *prikeyfile;
137	RSA *rsa_key; // our private rsa key
138	loglevel llevel;
139	u8 ip_proto; // the ip protocol to use
140	uid_t change_uid; // the uid of the user to switch to, or 0
141	gid_t change_gid; // the gid of the user to switch to, or 0
142	char *change_root;// the path to chroot to, "/" == anonymous
143	#if ENABLE_ICMP
144	u8 icmp_type; // the icmp type for the icmp-protocol
145	#endif
146
147	char *script_if_up;
148	char *script_node_up;
149	char *script_node_change;
150	char *script_node_down;
151	char *pidfilename;
152
153	#if ENABLE_HTTP_PROXY
154	char *proxy_auth; // login:password
155	char *proxy_host; // the proxy hostname, e.g. proxy1.example.net
156	u16 proxy_port; // the proxy port, e.g. 3128
157	#endif
158
159	#if ENABLE_DNS
160	char *dns_forw_host;
161	bool dns_case_preserving;
162	u16 dns_forw_port;
163	float dns_timeout_factor;
164	float dns_send_interval;
165	float dns_overlap_factor;
166	int dns_max_outstanding;
167	#endif
168
169	void init ();
170	void cleanup ();
171	void clear ();
172
173	conf_node find_node (const char name);
174
175	// create a filename from string, replacing %s by the nodename
176	// and using relative paths under confbase.
177	char config_filename (const char name, const char *dflt = 0);
178
179	void print ();
180
181	configuration ();
182	~configuration ();
183	};
184
185	struct configuration_parser
186	{
187	configuration &conf;
188
189	bool need_keys;
190	conf_node *node;
191
192	int argc;
193	char **argv;
194
195	configuration_parser (configuration &conf, bool need_keys, int argc, char **argv);
196
197	void parse_file (const char *fname);
198	const char parse_line (char line);
199	void parse_argv ();
200	};
201
202	extern struct configuration conf;
203
204	#define THISNODE ::conf.thisnode
205
206	#endif
207