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Comparing gvpe/src/connection.h (file contents):
Revision 1.29 by pcg, Sun Dec 2 00:09:35 2007 UTC vs.
Revision 1.38 by root, Thu Jul 18 13:35:16 2013 UTC

1/* 1/*
2 connection.h -- header for connection.C 2 connection.h -- header for connection.C
3 Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de> 3 Copyright (C) 2003-2008,2013 Marc Lehmann <gvpe@schmorp.de>
4 4
5 This file is part of GVPE. 5 This file is part of GVPE.
6 6
7 GVPE is free software; you can redistribute it and/or modify 7 GVPE is free software; you can redistribute it and/or modify it
8 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
9 the Free Software Foundation; either version 2 of the License, or 9 Free Software Foundation; either version 3 of the License, or (at your
10 (at your option) any later version. 10 option) any later version.
11 11
12 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
13 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
15 GNU General Public License for more details. 15 Public License for more details.
16 16
17 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
18 along with gvpe; if not, write to the Free Software 18 with this program; if not, see <http://www.gnu.org/licenses/>.
19 Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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.
20*/ 30*/
21 31
22#ifndef GVPE_CONNECTION_H__ 32#ifndef GVPE_CONNECTION_H__
23#define GVPE_CONNECTION_H__ 33#define GVPE_CONNECTION_H__
24 34
27#include "global.h" 37#include "global.h"
28#include "conf.h" 38#include "conf.h"
29#include "sockinfo.h" 39#include "sockinfo.h"
30#include "util.h" 40#include "util.h"
31#include "device.h" 41#include "device.h"
42#include "curve25519.h"
43#include "iv_gen.h"
32 44
33struct vpn; 45struct vpn;
34 46
35// called after HUP etc. to (re-)initialize global data structures 47// called after HUP etc. to (re-)initialize global data structures
36void connection_init (); 48void connection_init ();
37 49
50typedef curve25519_key ecdh_key;
51
38struct rsaid 52struct rsa_data
39{ 53{
40 u8 id[RSA_IDLEN]; // the challenge id 54 u32 seqno;
55 u8 auth_key[AUTH_SIZE];
56 u8 mac_key[MAC_KEYSIZE]; // used to generate hmac key
57 u8 cipher_key[CIPHER_KEYSIZE]; // used to generate cipher key
58 u8 hkdf_salt[HKDF_SALT]; // used as hkdf salt
59 u8 pad[
60 (RSABITS >> 3)
61 - 41 // OAEP
62 - sizeof (u32) // seqno
63 - AUTH_SIZE
64 - MAC_KEYSIZE
65 - CIPHER_KEYSIZE
66 - HKDF_SALT
67 - 3 // struct alignment...
68 ];
41}; 69};
42 70
43typedef rsaclear rsachallenge; // challenge data; 71struct auth_data
44typedef rsacrypt rsaencrdata; // encrypted challenge 72{
45typedef u8 rsaresponse[RSA_RESLEN]; // the encrypted ripemd160 hash 73 rsa_data rsa;
74 ecdh_key ecdh;
75};
76
77typedef u8 rsa_crypt[RSA_KEYLEN]; // encrypted challenge
78
79struct auth_encr
80{
81 rsa_crypt rsa;
82 ecdh_key ecdh;
83};
84
85typedef u8 auth_mac[AUTH_SIZE];
86
87struct auth_response
88{
89 auth_mac mac;
90 ecdh_key ecdh;
91};
46 92
47//////////////////////////////////////////////////////////////////////////////////////// 93////////////////////////////////////////////////////////////////////////////////////////
48 94
49struct crypto_ctx; 95struct crypto_ctx;
50 96
71 PT_PING, PT_PONG, // wasting namespace space? ;) 117 PT_PING, PT_PONG, // wasting namespace space? ;)
72 PT_AUTH_REQ, // authentification request 118 PT_AUTH_REQ, // authentification request
73 PT_AUTH_RES, // authentification response 119 PT_AUTH_RES, // authentification response
74 PT_CONNECT_REQ, // want other node to contact me 120 PT_CONNECT_REQ, // want other node to contact me
75 PT_CONNECT_INFO, // request connection to some node 121 PT_CONNECT_INFO, // request connection to some node
76 PT_DATA_BRIDGED, // uncompressed packet with foreign mac pot. larger than path mtu 122 PT_DATA_BRIDGED, // uncompressed packet with foreign mac pot. larger than path mtu (NYI)
77 PT_MAX 123 PT_MAX
78 }; 124 };
79 125
80 u8 type; 126 u8 type;
81 u8 srcdst, src1, dst1; 127 u8 srcdst, src1, dst1;
101//////////////////////////////////////////////////////////////////////////////////////// 147////////////////////////////////////////////////////////////////////////////////////////
102 148
103// a very simple fifo pkt-queue 149// a very simple fifo pkt-queue
104class pkt_queue 150class pkt_queue
105{ 151{
106 net_packet *queue[QUEUEDEPTH];
107 int i, j; 152 int i, j;
153 int max_queue;
154 double max_ttl;
155
156 struct pkt {
157 ev_tstamp tstamp;
158 net_packet *pkt;
159 } *queue;
160
161 void expire_cb (ev::timer &w, int revents); ev::timer expire;
108 162
109public: 163public:
110 164
111 void put (net_packet *p); 165 void put (net_packet *p);
112 net_packet *get (); 166 net_packet *get ();
113 167
114 pkt_queue (); 168 bool empty ()
169 {
170 return i == j;
171 }
172
173 pkt_queue (double max_ttl, int max_queue);
115 ~pkt_queue (); 174 ~pkt_queue ();
116}; 175};
117 176
118enum 177enum
119{ 178{
129 188
130 sockinfo si; // the current(!) destination ip to send packets to 189 sockinfo si; // the current(!) destination ip to send packets to
131 int retry_cnt; 190 int retry_cnt;
132 191
133 tstamp last_activity; // time of last packet received 192 tstamp last_activity; // time of last packet received
193 tstamp last_establish_attempt;
194 //tstamp last_si_change; // time we last changed the socket address
134 195
135 u32 oseqno; 196 u32 oseqno;
136 sliding_window iseqno; 197 sliding_window iseqno;
137 198
138 u8 protocol; 199 u8 protocol;
139 u8 features; 200 u8 features;
201 bool is_direct; // current connection (si) is direct?
140 202
141 pkt_queue data_queue, vpn_queue; 203 pkt_queue data_queue, vpn_queue;
142 204
143 crypto_ctx *octx, *ictx; 205 crypto_ctx *octx, *ictx;
206 iv_gen oiv; // generator for random byte prefix
207
208 void generate_auth_data ();
209
210 ev_tstamp auth_expire; // when the snd_* and *_ecdh values expire
211
212 // send auth data - used for octx
213 auth_data snd_auth;
214 auth_mac snd_auth_mac; // expected response mac
215 ecdh_key snd_ecdh_a; // the secret ecdh key we used for our request
216 ecdh_key snd_ecdh_b; // the public ecdh key we received in the response
217 bool have_snd_auth; // received response for our req
218
219 // receive auth data - used for ictx
220 auth_data rcv_auth;
221 ecdh_key rcv_ecdh_a; // the secret ecdh key we used for our response
222 ecdh_key rcv_ecdh_b; // the public ecdh key we sent in our response
223 bool have_rcv_auth; // received auth from other side
144 224
145#if ENABLE_DNS 225#if ENABLE_DNS
146 struct dns_connection *dns; 226 struct dns_connection *dns;
147
148 void dnsv4_reset_connection ();
149#endif 227#endif
150 228
151 enum conf_node::connectmode connectmode; 229 enum conf_node::connectmode connectmode;
152 u8 prot_minor; // minor number of other side 230 u8 prot_minor; // minor number of other side
153 231
154 void reset_si (); 232 void reset_si ();
155 const sockinfo &forward_si (const sockinfo &si) const; 233 const sockinfo &forward_si (const sockinfo &si) const;
156 234
157 void shutdown (); 235 void shutdown ();
158 void connection_established (); 236 void connection_established (const sockinfo &rsi);
159 void reset_connection (); 237 void reset_connection ();
160 238
161 void establish_connection_cb (ev::timer &w, int revents); ev::timer establish_connection; 239 void establish_connection_cb (ev::timer &w, int revents); ev::timer establish_connection;
162 void rekey_cb (ev::timer &w, int revents); ev::timer rekey; // next rekying (actually current reset + reestablishing) 240 void rekey_cb (ev::timer &w, int revents); ev::timer rekey; // next rekying (actually current reset + reestablishing)
163 void keepalive_cb (ev::timer &w, int revents); ev::timer keepalive; // next keepalive probe 241 void keepalive_cb (ev::timer &w, int revents); ev::timer keepalive; // next keepalive probe
164 242
165 void send_connect_request (int id); 243 void send_connect_request (int id);
166 void send_auth_request (const sockinfo &si, bool initiate); 244 void send_auth_request (const sockinfo &si, bool initiate);
167 void send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg); 245 void send_auth_response (const sockinfo &si);
168 void send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols); 246 void send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols);
169 void send_reset (const sockinfo &dsi); 247 void send_reset (const sockinfo &dsi);
170 void send_ping (const sockinfo &dsi, u8 pong = 0); 248 void send_ping (const sockinfo &dsi, u8 pong = 0);
171 void send_data_packet (tap_packet *pkt); 249 void send_data_packet (tap_packet *pkt);
172 250
251 void post_inject_queue ();
173 void inject_data_packet (tap_packet *pkt, bool broadcast = false); 252 void inject_data_packet (tap_packet *pkt);
174 void inject_vpn_packet (vpn_packet *pkt, int tos = 0); // for forwarding 253 void inject_vpn_packet (vpn_packet *pkt, int tos = 0); // for forwarding
175 254
176 void recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi); 255 void recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi);
177 void send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos = 0); 256 void send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos = 0);
178 257
179 void script_init_env (const char *ext); 258 void script_init_env (const char *ext);
180 void script_init_connect_env (); 259 void script_init_connect_env ();
181 const char *script_node_up (); 260 const char *script_node_up ();
261 const char *script_node_change ();
182 const char *script_node_down (); 262 const char *script_node_down ();
183 263
184 void dump_status (); 264 void dump_status ();
185 265
186 connection (struct vpn *vpn, conf_node *conf); 266 connection (struct vpn *vpn, conf_node *conf);

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