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_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;
  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 ();

  // 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:	1.42
Committed:	Tue Dec 4 10:29:43 2012 UTC (13 years, 9 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.41:	+10 -10 lines
Log Message:	* empty log message *
#	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	root	1.42	#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	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	1.41	PROT_ALL = 0x1f
63	pcg	1.8	};
64	pcg	1.1
65	pcg	1.26	#define PROT_RELIABLE (PROT_TCPv4 \| PROT_DNSv4)
66			#define PROT_SLOW PROT_DNSv4
67
68	pcg	1.10	// select the "best" protocol of the available ones
69			u8 best_protocol (u8 protset);
70			const char *strprotocol (u8 protocol);
71
72	pcg	1.30	struct conf_node
73			{
74	pcg	1.1	int id; // the id of this node, a 12-bit-number
75
76			RSA *rsa_key; // his public key
77			char *nodename; // nodename, an internal nickname.
78			char *hostname; // hostname, if known, or NULL.
79	pcg	1.29	char *if_up_data;
80	pcg	1.22	#if ENABLE_DNS
81			char *domain; // dns tunnel domain
82	pcg	1.24	#endif
83			char *dns_hostname;
84	pcg	1.22	u16 dns_port;
85	pcg	1.8
86	pcg	1.9	u8 protocols; // protocols this host can send & receive
87	pcg	1.22	u16 udp_port, tcp_port; // the port to bind to
88	pcg	1.21	int max_retry;
89	pcg	1.33	double max_ttl; // packets expire after this many seconds
90			int max_queue; // maixmum send queue length
91	pcg	1.1
92	pcg	1.7	enum connectmode { C_ONDEMAND, C_NEVER, C_ALWAYS, C_DISABLED } connectmode;
93	pcg	1.1	bool compress;
94	pcg	1.4	bool inherit_tos; // inherit TOS in packets send to this destination
95	pcg	1.1
96	pcg	1.32	vector<const char *> allow_direct;
97			vector<const char *> deny_direct;
98
99	pcg	1.1	u32 routerprio;
100	pcg	1.32
101	pcg	1.35	u8 connectable_protocols () const
102			{
103			u8 protocols = this->protocols;
104
105			// mask out endpoints we can't connect to
106			if (!udp_port) protocols &= ~PROT_UDPv4;
107			if (!tcp_port) protocols &= ~PROT_TCPv4;
108			if (!dns_port) protocols &= ~PROT_DNSv4;
109
110			return protocols;
111			}
112
113			bool may_direct (struct conf_node *other);
114			void finalise ();
115	pcg	1.1
116			void print ();
117
118	pcg	1.12	~conf_node ();
119	pcg	1.1	};
120
121	pcg	1.30	struct configuration
122			{
123	pcg	1.1	typedef vector<conf_node *> node_vector;
124			node_vector nodes;
125			conf_node default_node;
126			conf_node *thisnode;
127	pcg	1.6	int mtu; // the mtu used for outgoing tunnel packets
128	pcg	1.36	int nfmark; // the SO_MARK // netfilter mark // fwmark
129	pcg	1.6	double rekey; // rekey interval
130			double keepalive; // keepalive probes interval
131			char *ifname; // the interface name (tap0 ...)
132			bool ifpersist; // should the interface be persistent
133	pcg	1.1	char *prikeyfile;
134	pcg	1.9	RSA *rsa_key; // our private rsa key
135	pcg	1.2	loglevel llevel;
136	pcg	1.13	u8 ip_proto; // the ip protocol to use
137	root	1.42	uid_t change_uid; // the uid of the user to switch to, or 0
138			gid_t change_gid; // the gid of the user to switch to, or 0
139			char *change_root;// the path to chroot to, "/" == anonymous
140	pcg	1.15	#if ENABLE_ICMP
141	pcg	1.13	u8 icmp_type; // the icmp type for the icmp-protocol
142	pcg	1.15	#endif
143	pcg	1.1
144			char *script_if_up;
145			char *script_node_up;
146	pcg	1.37	char *script_node_change;
147	pcg	1.1	char *script_node_down;
148	pcg	1.20	char *pidfilename;
149	pcg	1.12
150			#if ENABLE_HTTP_PROXY
151			char *proxy_auth; // login:password
152			char *proxy_host; // the proxy hostname, e.g. proxy1.example.net
153			u16 proxy_port; // the proxy port, e.g. 3128
154			#endif
155	pcg	1.23
156	pcg	1.24	#if ENABLE_DNS
157	pcg	1.22	char *dns_forw_host;
158	root	1.38	bool dns_case_preserving;
159	pcg	1.22	u16 dns_forw_port;
160	pcg	1.28	float dns_timeout_factor;
161			float dns_send_interval;
162			float dns_overlap_factor;
163			int dns_max_outstanding;
164	pcg	1.24	#endif
165	pcg	1.1
166			void init ();
167			void cleanup ();
168	pcg	1.30	void clear ();
169	pcg	1.1
170			// create a filename from string, replacing %s by the nodename
171			// and using relative paths under confbase.
172	root	1.38	char config_filename (const char name, const char *dflt = 0);
173	pcg	1.1
174			void print ();
175
176			configuration ();
177			~configuration ();
178			};
179
180	pcg	1.30	struct configuration_parser
181			{
182			configuration &conf;
183
184			bool need_keys;
185			conf_node *node;
186
187			int argc;
188			char **argv;
189
190			configuration_parser (configuration &conf, bool need_keys, int argc, char **argv);
191
192	root	1.38	void parse_file (const char *fname);
193	pcg	1.30	const char parse_line (char line);
194			void parse_argv ();
195			};
196
197	pcg	1.1	extern struct configuration conf;
198
199			#define THISNODE ::conf.thisnode
200
201			#endif
202