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
#	User	Rev	Content
1	pcg	1.1	/*
2			conf.h -- configuration database
3	pcg	1.34	Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de>
4	pcg	1.1
5	pcg	1.25	This file is part of GVPE.
6
7	pcg	1.34	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	pcg	1.1	*/
31
32	pcg	1.27	#ifndef GVPE_CONF_H__
33			#define GVPE_CONF_H__
34	pcg	1.1
35	pcg	1.19	#include <vector>
36
37	pcg	1.11	#include <openssl/rsa.h>
38	pcg	1.1
39	pcg	1.2	#include "slog.h"
40	pcg	1.1	#include "global.h"
41
42	pcg	1.28	#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	pcg	1.33	#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	pcg	1.28
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	pcg	1.8
55	pcg	1.30	enum
56			{
57	pcg	1.13	PROT_UDPv4 = 0x01, // udp over ipv4
58			PROT_IPv4 = 0x02, // generic ip protocol
59	pcg	1.22	PROT_TCPv4 = 0x04, // tcp over ipv4 (server)
60	pcg	1.14	PROT_ICMPv4 = 0x08, // icmp over ipv4
61	pcg	1.22	PROT_DNSv4 = 0x10, // dns tunnel ipv4 (server)
62	root	1.39	PROT_IPv42 = 0x20, // temporary hack to invetsigate packet loss
63			PROT_EMPTY = 0x00 // not used
64	pcg	1.8	};
65	pcg	1.1
66	pcg	1.26	#define PROT_RELIABLE (PROT_TCPv4 \| PROT_DNSv4)
67			#define PROT_SLOW PROT_DNSv4
68
69	pcg	1.10	// select the "best" protocol of the available ones
70			u8 best_protocol (u8 protset);
71			const char *strprotocol (u8 protocol);
72
73	pcg	1.30	struct conf_node
74			{
75	pcg	1.1	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	pcg	1.29	char *if_up_data;
81	pcg	1.22	#if ENABLE_DNS
82			char *domain; // dns tunnel domain
83	pcg	1.24	#endif
84			char *dns_hostname;
85	pcg	1.22	u16 dns_port;
86	pcg	1.8
87	pcg	1.9	u8 protocols; // protocols this host can send & receive
88	pcg	1.22	u16 udp_port, tcp_port; // the port to bind to
89	pcg	1.21	int max_retry;
90	pcg	1.33	double max_ttl; // packets expire after this many seconds
91			int max_queue; // maixmum send queue length
92	pcg	1.1
93	pcg	1.7	enum connectmode { C_ONDEMAND, C_NEVER, C_ALWAYS, C_DISABLED } connectmode;
94	pcg	1.1	bool compress;
95	pcg	1.4	bool inherit_tos; // inherit TOS in packets send to this destination
96	pcg	1.1
97	pcg	1.32	vector<const char *> allow_direct;
98			vector<const char *> deny_direct;
99
100	pcg	1.1	u32 routerprio;
101	pcg	1.32
102	pcg	1.35	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	pcg	1.1
117			void print ();
118
119	pcg	1.12	~conf_node ();
120	pcg	1.1	};
121
122	pcg	1.30	struct configuration
123			{
124	pcg	1.1	typedef vector<conf_node *> node_vector;
125			node_vector nodes;
126			conf_node default_node;
127			conf_node *thisnode;
128	pcg	1.6	int mtu; // the mtu used for outgoing tunnel packets
129	pcg	1.36	int nfmark; // the SO_MARK // netfilter mark // fwmark
130	pcg	1.6	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	pcg	1.1	char *prikeyfile;
135	pcg	1.9	RSA *rsa_key; // our private rsa key
136	pcg	1.2	loglevel llevel;
137	pcg	1.13	u8 ip_proto; // the ip protocol to use
138	root	1.39	#if 1//D2
139			u8 ip2_proto; // the ip protocol to use
140			#endif
141	pcg	1.15	#if ENABLE_ICMP
142	pcg	1.13	u8 icmp_type; // the icmp type for the icmp-protocol
143	pcg	1.15	#endif
144	pcg	1.1
145			char *script_if_up;
146			char *script_node_up;
147	pcg	1.37	char *script_node_change;
148	pcg	1.1	char *script_node_down;
149	pcg	1.20	char *pidfilename;
150	pcg	1.12
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	pcg	1.23
157	pcg	1.24	#if ENABLE_DNS
158	pcg	1.22	char *dns_forw_host;
159	root	1.38	bool dns_case_preserving;
160	pcg	1.22	u16 dns_forw_port;
161	pcg	1.28	float dns_timeout_factor;
162			float dns_send_interval;
163			float dns_overlap_factor;
164			int dns_max_outstanding;
165	pcg	1.24	#endif
166	pcg	1.1
167			void init ();
168			void cleanup ();
169	pcg	1.30	void clear ();
170	pcg	1.1
171			// create a filename from string, replacing %s by the nodename
172			// and using relative paths under confbase.
173	root	1.38	char config_filename (const char name, const char *dflt = 0);
174	pcg	1.1
175			void print ();
176
177			configuration ();
178			~configuration ();
179			};
180
181	pcg	1.30	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	root	1.38	void parse_file (const char *fname);
194	pcg	1.30	const char parse_line (char line);
195			void parse_argv ();
196			};
197
198	pcg	1.1	extern struct configuration conf;
199
200			#define THISNODE ::conf.thisnode
201
202			#endif
203