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Comparing gvpe/src/connection.h (file contents):
Revision 1.17 by pcg, Thu Mar 3 07:24:57 2005 UTC vs.
Revision 1.31 by pcg, Thu Aug 7 17:30:28 2008 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) 2003-2005 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
6 it under the terms of the GNU General Public License as published by 8 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or 9 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version. 10 (at your 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,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 but 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
13 GNU General Public License for more details. 15 GNU General 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
16 along with this program; if not, write to the Free Software 18 along with gvpe; if not, write to the Free Software
17 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18*/ 20*/
19 21
20#ifndef VPE_CONNECTION_H__ 22#ifndef GVPE_CONNECTION_H__
21#define VPE_CONNECTION_H__ 23#define GVPE_CONNECTION_H__
22 24
23#include <openssl/hmac.h> 25#include <openssl/hmac.h>
24 26
25#include "global.h" 27#include "global.h"
26#include "conf.h" 28#include "conf.h"
… …
31struct vpn; 33struct vpn;
32 34
33// called after HUP etc. to (re-)initialize global data structures 35// called after HUP etc. to (re-)initialize global data structures
34void connection_init (); 36void connection_init ();
35 37
36struct rsaid { 38struct rsaid
39{
37 u8 id[RSA_IDLEN]; // the challenge id 40 u8 id[RSA_IDLEN]; // the challenge id
38}; 41};
39 42
40typedef rsaclear rsachallenge; // challenge data; 43typedef rsaclear rsachallenge; // challenge data;
41typedef rsacrypt rsaencrdata; // encrypted challenge 44typedef rsacrypt rsaencrdata; // encrypted challenge
… …
57 60
58 void hmac_gen (crypto_ctx * ctx); 61 void hmac_gen (crypto_ctx * ctx);
59}; 62};
60 63
61struct vpn_packet : hmac_packet 64struct vpn_packet : hmac_packet
62 { 65{
63 enum ptype 66 enum ptype
64 { 67 {
65 PT_RESET = 0, 68 PT_RESET = 0,
66 PT_DATA_UNCOMPRESSED, 69 PT_DATA_UNCOMPRESSED,
67 PT_DATA_COMPRESSED, 70 PT_DATA_COMPRESSED,
68 PT_PING, PT_PONG, // wasting namespace space? ;) 71 PT_PING, PT_PONG, // wasting namespace space? ;)
69 PT_AUTH_REQ, // authentification request 72 PT_AUTH_REQ, // authentification request
70 PT_AUTH_RES, // authentification response 73 PT_AUTH_RES, // authentification response
71 PT_CONNECT_REQ, // want other host to contact me 74 PT_CONNECT_REQ, // want other node to contact me
72 PT_CONNECT_INFO, // request connection to some node 75 PT_CONNECT_INFO, // request connection to some node
76 PT_DATA_BRIDGED, // uncompressed packet with foreign mac pot. larger than path mtu (NYI)
73 PT_MAX 77 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 }; 78 };
79
80 u8 type;
81 u8 srcdst, src1, dst1;
82
83 void set_hdr (ptype type_, unsigned int dst);
84
85 unsigned int src () const
86 {
87 return src1 | ((srcdst >> 4) << 8);
88 }
89
90 unsigned int dst () const
91 {
92 return dst1 | ((srcdst & 0xf) << 8);
93 }
94
95 ptype typ () const
96 {
97 return (ptype) type;
98 }
99};
96 100
97//////////////////////////////////////////////////////////////////////////////////////// 101////////////////////////////////////////////////////////////////////////////////////////
98 102
99// a very simple fifo pkt-queue 103// a very simple fifo pkt-queue
100class pkt_queue 104class pkt_queue
101 { 105{
102 net_packet *queue[QUEUEDEPTH];
103 int i, j; 106 int i, j;
107 int max_queue;
108 double max_ttl;
104 109
110 struct pkt {
111 ev_tstamp tstamp;
112 net_packet *pkt;
113 } *queue;
114
115 void expire_cb (ev::timer &w, int revents); ev::timer expire;
116
105 public: 117public:
106 118
107 void put (net_packet *p); 119 void put (net_packet *p);
108 net_packet *get (); 120 net_packet *get ();
109 121
110 pkt_queue (); 122 bool empty ()
123 {
124 return i == j;
125 }
126
127 pkt_queue (double max_ttl, int max_queue);
111 ~pkt_queue (); 128 ~pkt_queue ();
112 }; 129};
113 130
114enum 131enum
115 { 132{
116 FEATURE_COMPRESSION = 0x01, 133 FEATURE_COMPRESSION = 0x01,
117 FEATURE_ROHC = 0x02, 134 FEATURE_ROHC = 0x02,
118 }; 135 FEATURE_BRIDGING = 0x04,
136};
119 137
120struct connection 138struct connection
121 { 139{
122 conf_node *conf; 140 conf_node *conf;
123 struct vpn *vpn; 141 struct vpn *vpn;
124 142
125 sockinfo si; // the current(!) destination ip to send packets to 143 sockinfo si; // the current(!) destination ip to send packets to
126 int retry_cnt; 144 int retry_cnt;
127 145
128 tstamp last_activity; // time of last packet received 146 tstamp last_activity; // time of last packet received
147 tstamp last_establish_attempt;
129 148
130 u32 oseqno; 149 u32 oseqno;
131 sliding_window iseqno; 150 sliding_window iseqno;
132 151
133 u8 protocol; 152 u8 protocol;
134 u8 features; 153 u8 features;
135 154
136 pkt_queue data_queue, vpn_queue; 155 pkt_queue data_queue, vpn_queue;
137 156
138 crypto_ctx *octx, *ictx; 157 crypto_ctx *octx, *ictx;
139 158
140#if ENABLE_DNS 159#if ENABLE_DNS
141 sockinfo dns_si; // forwarder 160 struct dns_connection *dns;
142 161
143 vector<struct dns_rcv *> dns_rcvpq; int dns_rcvseq; // received packets 162 void dnsv4_reset_connection ();
144
145 struct byte_stream *dns_rcvdq;
146 struct byte_stream *dns_snddq; int dns_sndseq; //D
147
148 void dnsv4_cb (time_watcher &w); time_watcher dnsv4_tw;
149 bool send_dnsv4_packet (vpn_packet *pkt, const sockinfo &si, int tos);
150 void dnsv4_receive_rep (struct dns_rcv *r);
151#endif 163#endif
152 164
153 enum conf_node::connectmode connectmode; 165 enum conf_node::connectmode connectmode;
154 u8 prot_minor; // minor number of other side 166 u8 prot_minor; // minor number of other side
155 167
156 void reset_si (); 168 void reset_si ();
157 const sockinfo &forward_si (const sockinfo &si) const; 169 const sockinfo &forward_si (const sockinfo &si) const;
158 170
159 void shutdown (); 171 void shutdown ();
160 void connection_established (); 172 void connection_established ();
161 void reset_connection (); 173 void reset_connection ();
162 174
163 void establish_connection_cb (time_watcher &w); time_watcher establish_connection; 175 void establish_connection_cb (ev::timer &w, int revents); ev::timer establish_connection;
164 void rekey_cb (time_watcher &w); time_watcher rekey; // next rekying (actually current reset + reestablishing) 176 void rekey_cb (ev::timer &w, int revents); ev::timer rekey; // next rekying (actually current reset + reestablishing)
165 void keepalive_cb (time_watcher &w); time_watcher keepalive; // next keepalive probe 177 void keepalive_cb (ev::timer &w, int revents); ev::timer keepalive; // next keepalive probe
166 178
167 void send_connect_request (int id); 179 void send_connect_request (int id);
168 void send_auth_request (const sockinfo &si, bool initiate); 180 void send_auth_request (const sockinfo &si, bool initiate);
169 void send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg); 181 void send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg);
170 void send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols); 182 void send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols);
171 void send_reset (const sockinfo &dsi); 183 void send_reset (const sockinfo &dsi);
172 void send_ping (const sockinfo &dsi, u8 pong = 0); 184 void send_ping (const sockinfo &dsi, u8 pong = 0);
173 void send_data_packet (tap_packet *pkt); 185 void send_data_packet (tap_packet *pkt);
174 186
187 void post_inject_queue ();
175 void inject_data_packet (tap_packet *pkt, bool broadcast = false); 188 void inject_data_packet (tap_packet *pkt);
176 void inject_vpn_packet (vpn_packet *pkt, int tos = 0); // for forwarding 189 void inject_vpn_packet (vpn_packet *pkt, int tos = 0); // for forwarding
177 190
191 void recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi);
178 void send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos = 0); 192 void send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos = 0);
179 void recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi);
180 193
181 void script_node (); 194 void script_init_env (const char *ext);
195 void script_init_connect_env ();
182 const char *script_node_up (); 196 const char *script_node_up ();
183 const char *script_node_down (); 197 const char *script_node_down ();
184 198
185 void dump_status (); 199 void dump_status ();
186 200
187 connection (struct vpn *vpn, conf_node *conf); 201 connection (struct vpn *vpn, conf_node *conf);
188 ~connection (); 202 ~connection ();
189 }; 203};
190 204
191#endif 205#endif
192 206

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