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Comparing gvpe/src/connection.h (file contents):
Revision 1.14 by pcg, Sun Feb 8 07:24:25 2004 UTC vs.
Revision 1.34 by pcg, Sat Jul 18 05:59:16 2009 UTC

1/* 1/*
2 connection.h -- header for connection.C 2 connection.h -- header for connection.C
3 Copyright (C) 2003-2004 Marc Lehmann <pcg@goof.com> 3 Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de>
4 4
5 This file is part of GVPE.
6
5 This program is free software; you can redistribute it and/or modify 7 GVPE is free software; you can redistribute it and/or modify it
6 it under the terms of the GNU General Public License as published by 8 under the terms of the GNU General Public License as published by the
7 the Free Software Foundation; either version 2 of the License, or 9 Free Software Foundation; either version 3 of the License, or (at your
8 (at your option) any later version. 10 option) any later version.
9 11
10 This program is distributed in the hope that it will be useful, 12 This program is distributed in the hope that it will be useful, but
11 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
13 GNU General Public License for more details. 15 Public License for more details.
14 16
15 You should have received a copy of the GNU General Public License 17 You should have received a copy of the GNU General Public License along
16 along with this program; if not, write to the Free Software 18 with this program; if not, see <http://www.gnu.org/licenses/>.
17 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 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.
18*/ 30*/
19 31
20#ifndef VPE_CONNECTION_H__ 32#ifndef GVPE_CONNECTION_H__
21#define VPE_CONNECTION_H__ 33#define GVPE_CONNECTION_H__
22 34
23#include <openssl/hmac.h> 35#include <openssl/hmac.h>
24 36
25#include "global.h" 37#include "global.h"
26#include "conf.h" 38#include "conf.h"
… …
31struct vpn; 43struct vpn;
32 44
33// called after HUP etc. to (re-)initialize global data structures 45// called after HUP etc. to (re-)initialize global data structures
34void connection_init (); 46void connection_init ();
35 47
36struct rsaid { 48struct rsaid
49{
37 u8 id[RSA_IDLEN]; // the challenge id 50 u8 id[RSA_IDLEN]; // the challenge id
38}; 51};
39 52
40typedef rsaclear rsachallenge; // challenge data; 53typedef rsaclear rsachallenge; // challenge data;
41typedef rsacrypt rsaencrdata; // encrypted challenge 54typedef rsacrypt rsaencrdata; // encrypted challenge
… …
57 70
58 void hmac_gen (crypto_ctx * ctx); 71 void hmac_gen (crypto_ctx * ctx);
59}; 72};
60 73
61struct vpn_packet : hmac_packet 74struct vpn_packet : hmac_packet
62 { 75{
63 enum ptype 76 enum ptype
64 { 77 {
65 PT_RESET = 0, 78 PT_RESET = 0,
66 PT_DATA_UNCOMPRESSED, 79 PT_DATA_UNCOMPRESSED,
67 PT_DATA_COMPRESSED, 80 PT_DATA_COMPRESSED,
68 PT_PING, PT_PONG, // wasting namespace space? ;) 81 PT_PING, PT_PONG, // wasting namespace space? ;)
69 PT_AUTH_REQ, // authentification request 82 PT_AUTH_REQ, // authentification request
70 PT_AUTH_RES, // authentification response 83 PT_AUTH_RES, // authentification response
71 PT_CONNECT_REQ, // want other host to contact me 84 PT_CONNECT_REQ, // want other node to contact me
72 PT_CONNECT_INFO, // request connection to some node 85 PT_CONNECT_INFO, // request connection to some node
86 PT_DATA_BRIDGED, // uncompressed packet with foreign mac pot. larger than path mtu (NYI)
73 PT_MAX 87 PT_MAX
74 };
75
76 u8 type;
77 u8 srcdst, src1, dst1;
78
79 void set_hdr (ptype type_, unsigned int dst);
80
81 unsigned int src () const
82 {
83 return src1 | ((srcdst >> 4) << 8);
84 }
85
86 unsigned int dst () const
87 {
88 return dst1 | ((srcdst & 0xf) << 8);
89 }
90
91 ptype typ () const
92 {
93 return (ptype) type;
94 }
95 }; 88 };
89
90 u8 type;
91 u8 srcdst, src1, dst1;
92
93 void set_hdr (ptype type_, unsigned int dst);
94
95 unsigned int src () const
96 {
97 return src1 | ((srcdst >> 4) << 8);
98 }
99
100 unsigned int dst () const
101 {
102 return dst1 | ((srcdst & 0xf) << 8);
103 }
104
105 ptype typ () const
106 {
107 return (ptype) type;
108 }
109};
96 110
97//////////////////////////////////////////////////////////////////////////////////////// 111////////////////////////////////////////////////////////////////////////////////////////
98 112
99// a very simple fifo pkt-queue 113// a very simple fifo pkt-queue
100class pkt_queue 114class pkt_queue
101 { 115{
102 net_packet *queue[QUEUEDEPTH];
103 int i, j; 116 int i, j;
117 int max_queue;
118 double max_ttl;
104 119
120 struct pkt {
121 ev_tstamp tstamp;
122 net_packet *pkt;
123 } *queue;
124
125 void expire_cb (ev::timer &w, int revents); ev::timer expire;
126
105 public: 127public:
106 128
107 void put (net_packet *p); 129 void put (net_packet *p);
108 net_packet *get (); 130 net_packet *get ();
109 131
110 pkt_queue (); 132 bool empty ()
133 {
134 return i == j;
135 }
136
137 pkt_queue (double max_ttl, int max_queue);
111 ~pkt_queue (); 138 ~pkt_queue ();
112 }; 139};
113 140
114enum 141enum
115 { 142{
116 FEATURE_COMPRESSION = 0x01, 143 FEATURE_COMPRESSION = 0x01,
117 FEATURE_ROHC = 0x02, 144 FEATURE_ROHC = 0x02,
118 }; 145 FEATURE_BRIDGING = 0x04,
146};
119 147
120struct connection 148struct connection
121 { 149{
122 conf_node *conf; 150 conf_node *conf;
123 struct vpn *vpn; 151 struct vpn *vpn;
124 152
125 sockinfo si; // the current(!) destination ip to send packets to 153 sockinfo si; // the current(!) destination ip to send packets to
126 int retry_cnt; 154 int retry_cnt;
127 155
128 tstamp last_activity; // time of last packet received 156 tstamp last_activity; // time of last packet received
157 tstamp last_establish_attempt;
158 //tstamp last_si_change; // time we last changed the socket address
129 159
130 u32 oseqno; 160 u32 oseqno;
131 sliding_window iseqno; 161 sliding_window iseqno;
132 162
133 u8 protocol; 163 u8 protocol;
134 u8 features; 164 u8 features;
165 bool is_direct; // current connection (si) is direct?
135 166
136 pkt_queue data_queue, vpn_queue; 167 pkt_queue data_queue, vpn_queue;
137 168
138 crypto_ctx *octx, *ictx; 169 crypto_ctx *octx, *ictx;
139 170
140 enum conf_node::connectmode connectmode; 171#if ENABLE_DNS
141 u8 prot_minor; // minor number of other side 172 struct dns_connection *dns;
142 173
143 void reset_si ();
144 const sockinfo &forward_si (const sockinfo &si) const;
145
146 void shutdown ();
147 void connection_established ();
148 void reset_connection (); 174 void dnsv4_reset_connection ();
149
150 void establish_connection_cb (time_watcher &w); time_watcher establish_connection;
151 void rekey_cb (time_watcher &w); time_watcher rekey; // next rekying (actually current reset + reestablishing)
152 void keepalive_cb (time_watcher &w); time_watcher keepalive; // next keepalive probe
153
154 void send_connect_request (int id);
155 void send_auth_request (const sockinfo &si, bool initiate);
156 void send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg);
157 void send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols);
158 void send_reset (const sockinfo &dsi);
159 void send_ping (const sockinfo &dsi, u8 pong = 0);
160 void send_data_packet (tap_packet *pkt);
161
162 void inject_data_packet (tap_packet *pkt, bool broadcast = false);
163 void inject_vpn_packet (vpn_packet *pkt, int tos = 0); // for forwarding
164
165 void send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos = 0);
166 void recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi);
167
168 void script_node ();
169 const char *script_node_up ();
170 const char *script_node_down ();
171
172 void dump_status ();
173
174 connection(struct vpn *vpn_);
175 ~connection ();
176 };
177
178#endif 175#endif
179 176
177 enum conf_node::connectmode connectmode;
178 u8 prot_minor; // minor number of other side
179
180 void reset_si ();
181 const sockinfo &forward_si (const sockinfo &si) const;
182
183 void shutdown ();
184 void connection_established ();
185 void reset_connection ();
186
187 void establish_connection_cb (ev::timer &w, int revents); ev::timer establish_connection;
188 void rekey_cb (ev::timer &w, int revents); ev::timer rekey; // next rekying (actually current reset + reestablishing)
189 void keepalive_cb (ev::timer &w, int revents); ev::timer keepalive; // next keepalive probe
190
191 void send_connect_request (int id);
192 void send_auth_request (const sockinfo &si, bool initiate);
193 void send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg);
194 void send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols);
195 void send_reset (const sockinfo &dsi);
196 void send_ping (const sockinfo &dsi, u8 pong = 0);
197 void send_data_packet (tap_packet *pkt);
198
199 void post_inject_queue ();
200 void inject_data_packet (tap_packet *pkt);
201 void inject_vpn_packet (vpn_packet *pkt, int tos = 0); // for forwarding
202
203 void recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi);
204 void send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos = 0);
205
206 void script_init_env (const char *ext);
207 void script_init_connect_env ();
208 const char *script_node_up ();
209 const char *script_node_change ();
210 const char *script_node_down ();
211
212 void dump_status ();
213
214 connection (struct vpn *vpn, conf_node *conf);
215 ~connection ();
216};
217
218#endif
219

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