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Comparing gvpe/src/connection.h (file contents):
Revision 1.27 by pcg, Mon Dec 5 12:58:09 2005 UTC vs.
Revision 1.33 by pcg, Sun Aug 10 01:34:36 2008 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 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
… …
33struct vpn; 43struct vpn;
34 44
35// called after HUP etc. to (re-)initialize global data structures 45// called after HUP etc. to (re-)initialize global data structures
36void connection_init (); 46void connection_init ();
37 47
38struct rsaid { 48struct rsaid
49{
39 u8 id[RSA_IDLEN]; // the challenge id 50 u8 id[RSA_IDLEN]; // the challenge id
40}; 51};
41 52
42typedef rsaclear rsachallenge; // challenge data; 53typedef rsaclear rsachallenge; // challenge data;
43typedef rsacrypt rsaencrdata; // encrypted challenge 54typedef rsacrypt rsaencrdata; // encrypted challenge
… …
59 70
60 void hmac_gen (crypto_ctx * ctx); 71 void hmac_gen (crypto_ctx * ctx);
61}; 72};
62 73
63struct vpn_packet : hmac_packet 74struct vpn_packet : hmac_packet
64 { 75{
65 enum ptype 76 enum ptype
66 { 77 {
67 PT_RESET = 0, 78 PT_RESET = 0,
68 PT_DATA_UNCOMPRESSED, 79 PT_DATA_UNCOMPRESSED,
69 PT_DATA_COMPRESSED, 80 PT_DATA_COMPRESSED,
70 PT_PING, PT_PONG, // wasting namespace space? ;) 81 PT_PING, PT_PONG, // wasting namespace space? ;)
71 PT_AUTH_REQ, // authentification request 82 PT_AUTH_REQ, // authentification request
72 PT_AUTH_RES, // authentification response 83 PT_AUTH_RES, // authentification response
73 PT_CONNECT_REQ, // want other node to contact me 84 PT_CONNECT_REQ, // want other node to contact me
74 PT_CONNECT_INFO, // request connection to some node 85 PT_CONNECT_INFO, // request connection to some node
75 PT_DATA_BRIDGED, // uncompressed packet with foreign mac pot. larger than path mtu 86 PT_DATA_BRIDGED, // uncompressed packet with foreign mac pot. larger than path mtu (NYI)
76 PT_MAX 87 PT_MAX
77 };
78
79 u8 type;
80 u8 srcdst, src1, dst1;
81
82 void set_hdr (ptype type_, unsigned int dst);
83
84 unsigned int src () const
85 {
86 return src1 | ((srcdst >> 4) << 8);
87 }
88
89 unsigned int dst () const
90 {
91 return dst1 | ((srcdst & 0xf) << 8);
92 }
93
94 ptype typ () const
95 {
96 return (ptype) type;
97 }
98 }; 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};
99 110
100//////////////////////////////////////////////////////////////////////////////////////// 111////////////////////////////////////////////////////////////////////////////////////////
101 112
102// a very simple fifo pkt-queue 113// a very simple fifo pkt-queue
103class pkt_queue 114class pkt_queue
104 { 115{
105 net_packet *queue[QUEUEDEPTH];
106 int i, j; 116 int i, j;
117 int max_queue;
118 double max_ttl;
107 119
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
108 public: 127public:
109 128
110 void put (net_packet *p); 129 void put (net_packet *p);
111 net_packet *get (); 130 net_packet *get ();
112 131
113 pkt_queue (); 132 bool empty ()
133 {
134 return i == j;
135 }
136
137 pkt_queue (double max_ttl, int max_queue);
114 ~pkt_queue (); 138 ~pkt_queue ();
115 }; 139};
116 140
117enum 141enum
118 { 142{
119 FEATURE_COMPRESSION = 0x01, 143 FEATURE_COMPRESSION = 0x01,
120 FEATURE_ROHC = 0x02, 144 FEATURE_ROHC = 0x02,
121 FEATURE_BRIDGING = 0x04, 145 FEATURE_BRIDGING = 0x04,
122 }; 146};
123 147
124struct connection 148struct connection
125 { 149{
126 conf_node *conf; 150 conf_node *conf;
127 struct vpn *vpn; 151 struct vpn *vpn;
128 152
129 sockinfo si; // the current(!) destination ip to send packets to 153 sockinfo si; // the current(!) destination ip to send packets to
130 int retry_cnt; 154 int retry_cnt;
131 155
132 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
133 159
134 u32 oseqno; 160 u32 oseqno;
135 sliding_window iseqno; 161 sliding_window iseqno;
136 162
137 u8 protocol; 163 u8 protocol;
138 u8 features; 164 u8 features;
165 bool is_direct; // current connection (si) is direct?
139 166
140 pkt_queue data_queue, vpn_queue; 167 pkt_queue data_queue, vpn_queue;
141 168
142 crypto_ctx *octx, *ictx; 169 crypto_ctx *octx, *ictx;
143 170
144#if ENABLE_DNS 171#if ENABLE_DNS
145 struct dns_connection *dns; 172 struct dns_connection *dns;
146 173
147 void dnsv4_reset_connection (); 174 void dnsv4_reset_connection ();
148#endif 175#endif
149 176
150 enum conf_node::connectmode connectmode; 177 enum conf_node::connectmode connectmode;
151 u8 prot_minor; // minor number of other side 178 u8 prot_minor; // minor number of other side
152 179
153 void reset_si (); 180 void reset_si ();
154 const sockinfo &forward_si (const sockinfo &si) const; 181 const sockinfo &forward_si (const sockinfo &si) const;
155 182
156 void shutdown (); 183 void shutdown ();
157 void connection_established (); 184 void connection_established ();
158 void reset_connection (); 185 void reset_connection ();
159 186
160 void establish_connection_cb (time_watcher &w); time_watcher establish_connection; 187 void establish_connection_cb (ev::timer &w, int revents); ev::timer establish_connection;
161 void rekey_cb (time_watcher &w); time_watcher rekey; // next rekying (actually current reset + reestablishing) 188 void rekey_cb (ev::timer &w, int revents); ev::timer rekey; // next rekying (actually current reset + reestablishing)
162 void keepalive_cb (time_watcher &w); time_watcher keepalive; // next keepalive probe 189 void keepalive_cb (ev::timer &w, int revents); ev::timer keepalive; // next keepalive probe
163 190
164 void send_connect_request (int id); 191 void send_connect_request (int id);
165 void send_auth_request (const sockinfo &si, bool initiate); 192 void send_auth_request (const sockinfo &si, bool initiate);
166 void send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg); 193 void send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg);
167 void send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols); 194 void send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols);
168 void send_reset (const sockinfo &dsi); 195 void send_reset (const sockinfo &dsi);
169 void send_ping (const sockinfo &dsi, u8 pong = 0); 196 void send_ping (const sockinfo &dsi, u8 pong = 0);
170 void send_data_packet (tap_packet *pkt); 197 void send_data_packet (tap_packet *pkt);
171 198
199 void post_inject_queue ();
172 void inject_data_packet (tap_packet *pkt, bool broadcast = false); 200 void inject_data_packet (tap_packet *pkt);
173 void inject_vpn_packet (vpn_packet *pkt, int tos = 0); // for forwarding 201 void inject_vpn_packet (vpn_packet *pkt, int tos = 0); // for forwarding
174 202
175 void recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi); 203 void recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi);
176 void send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos = 0); 204 void send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos = 0);
177 205
178 void script_init_env (const char *ext); 206 void script_init_env (const char *ext);
179 void script_init_connect_env (); 207 void script_init_connect_env ();
180 const char *script_node_up (); 208 const char *script_node_up ();
181 const char *script_node_down (); 209 const char *script_node_down ();
182 210
183 void dump_status (); 211 void dump_status ();
184 212
185 connection (struct vpn *vpn, conf_node *conf); 213 connection (struct vpn *vpn, conf_node *conf);
186 ~connection (); 214 ~connection ();
187 }; 215};
188 216
189#endif 217#endif
190 218

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