1 | /* |
1 | /* |
2 | connection.h -- header for connection.C |
2 | connection.h -- header for connection.C |
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3 | Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de> |
3 | |
4 | |
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5 | This file is part of GVPE. |
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6 | |
4 | This program is free software; you can redistribute it and/or modify |
7 | GVPE is free software; you can redistribute it and/or modify |
5 | 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 |
6 | the Free Software Foundation; either version 2 of the License, or |
9 | the Free Software Foundation; either version 2 of the License, or |
7 | (at your option) any later version. |
10 | (at your option) any later version. |
8 | |
11 | |
9 | 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, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
12 | GNU General Public License for more details. |
15 | GNU General Public License for more details. |
13 | |
16 | |
14 | 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 |
15 | along with this program; if not, write to the Free Software |
18 | along with gvpe; if not, write to the Free Software |
16 | 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 |
17 | */ |
20 | */ |
18 | |
21 | |
19 | #ifndef VPE_CONNECTION_H__ |
22 | #ifndef GVPE_CONNECTION_H__ |
20 | #define VPE_CONNECTION_H__ |
23 | #define GVPE_CONNECTION_H__ |
21 | |
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22 | #include <netinet/ip.h> // for tos etc. |
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23 | |
24 | |
24 | #include <openssl/hmac.h> |
25 | #include <openssl/hmac.h> |
25 | |
26 | |
26 | #include "global.h" |
27 | #include "global.h" |
27 | #include "conf.h" |
28 | #include "conf.h" |
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36 | |
37 | |
37 | struct rsaid { |
38 | struct rsaid { |
38 | u8 id[RSA_IDLEN]; // the challenge id |
39 | u8 id[RSA_IDLEN]; // the challenge id |
39 | }; |
40 | }; |
40 | |
41 | |
41 | typedef u8 rsachallenge[RSA_KEYLEN - RSA_OVERHEAD]; // challenge data; |
42 | typedef rsaclear rsachallenge; // challenge data; |
42 | typedef u8 rsaencrdata[RSA_KEYLEN]; // encrypted challenge |
43 | typedef rsacrypt rsaencrdata; // encrypted challenge |
43 | typedef u8 rsaresponse[RSA_RESLEN]; // the encrypted ripemd160 hash |
44 | typedef u8 rsaresponse[RSA_RESLEN]; // the encrypted ripemd160 hash |
44 | |
45 | |
45 | //////////////////////////////////////////////////////////////////////////////////////// |
46 | //////////////////////////////////////////////////////////////////////////////////////// |
46 | |
47 | |
47 | struct crypto_ctx; |
48 | struct crypto_ctx; |
48 | |
49 | |
49 | struct hmac_packet:net_packet |
50 | struct hmac_packet : net_packet |
50 | { |
51 | { |
51 | u8 hmac[HMACLENGTH]; // each and every packet has a hmac field, but that is not (yet) checked everywhere |
52 | u8 hmac[HMACLENGTH]; // each and every packet has a hmac field, but that is not (yet) checked everywhere |
52 | |
53 | |
53 | void hmac_set (crypto_ctx * ctx); |
54 | void hmac_set (crypto_ctx * ctx); |
54 | bool hmac_chk (crypto_ctx * ctx); |
55 | bool hmac_chk (crypto_ctx * ctx); |
… | |
… | |
75 | }; |
76 | }; |
76 | |
77 | |
77 | u8 type; |
78 | u8 type; |
78 | u8 srcdst, src1, dst1; |
79 | u8 srcdst, src1, dst1; |
79 | |
80 | |
80 | void set_hdr (ptype type, unsigned int dst); |
81 | void set_hdr (ptype type_, unsigned int dst); |
81 | |
82 | |
82 | unsigned int src () const |
83 | unsigned int src () const |
83 | { |
84 | { |
84 | return src1 | ((srcdst >> 4) << 8); |
85 | return src1 | ((srcdst >> 4) << 8); |
85 | } |
86 | } |
… | |
… | |
98 | //////////////////////////////////////////////////////////////////////////////////////// |
99 | //////////////////////////////////////////////////////////////////////////////////////// |
99 | |
100 | |
100 | // a very simple fifo pkt-queue |
101 | // a very simple fifo pkt-queue |
101 | class pkt_queue |
102 | class pkt_queue |
102 | { |
103 | { |
103 | tap_packet *queue[QUEUEDEPTH]; |
104 | net_packet *queue[QUEUEDEPTH]; |
104 | int i, j; |
105 | int i, j; |
105 | |
106 | |
106 | public: |
107 | public: |
107 | |
108 | |
108 | void put (tap_packet *p); |
109 | void put (net_packet *p); |
109 | tap_packet *get (); |
110 | net_packet *get (); |
110 | |
111 | |
111 | pkt_queue (); |
112 | pkt_queue (); |
112 | ~pkt_queue (); |
113 | ~pkt_queue (); |
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114 | }; |
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115 | |
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116 | enum |
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117 | { |
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118 | FEATURE_COMPRESSION = 0x01, |
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119 | FEATURE_ROHC = 0x02, |
113 | }; |
120 | }; |
114 | |
121 | |
115 | struct connection |
122 | struct connection |
116 | { |
123 | { |
117 | conf_node *conf; |
124 | conf_node *conf; |
… | |
… | |
124 | |
131 | |
125 | u32 oseqno; |
132 | u32 oseqno; |
126 | sliding_window iseqno; |
133 | sliding_window iseqno; |
127 | |
134 | |
128 | u8 protocol; |
135 | u8 protocol; |
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136 | u8 features; |
129 | |
137 | |
130 | pkt_queue queue; |
138 | pkt_queue data_queue, vpn_queue; |
131 | |
139 | |
132 | crypto_ctx *octx, *ictx; |
140 | crypto_ctx *octx, *ictx; |
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141 | |
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142 | #if ENABLE_DNS |
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143 | struct dns_connection *dns; |
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144 | |
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145 | void dnsv4_reset_connection (); |
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146 | #endif |
133 | |
147 | |
134 | enum conf_node::connectmode connectmode; |
148 | enum conf_node::connectmode connectmode; |
135 | u8 prot_minor; // minor number of other side |
149 | u8 prot_minor; // minor number of other side |
136 | |
150 | |
137 | void reset_dstaddr (); |
151 | void reset_si (); |
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152 | const sockinfo &forward_si (const sockinfo &si) const; |
138 | |
153 | |
139 | void shutdown (); |
154 | void shutdown (); |
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155 | void connection_established (); |
140 | void reset_connection (); |
156 | void reset_connection (); |
141 | void establish_connection_cb (tstamp &ts); time_watcher establish_connection; |
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142 | void rekey_cb (tstamp &ts); time_watcher rekey; // next rekying (actually current reset + reestablishing) |
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143 | void keepalive_cb (tstamp &ts); time_watcher keepalive; // next keepalive probe |
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144 | |
157 | |
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158 | void establish_connection_cb (time_watcher &w); time_watcher establish_connection; |
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159 | void rekey_cb (time_watcher &w); time_watcher rekey; // next rekying (actually current reset + reestablishing) |
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160 | void keepalive_cb (time_watcher &w); time_watcher keepalive; // next keepalive probe |
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161 | |
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162 | void send_connect_request (int id); |
145 | void send_auth_request (const sockinfo &si, bool initiate); |
163 | void send_auth_request (const sockinfo &si, bool initiate); |
146 | void send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg); |
164 | void send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg); |
147 | void send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols); |
165 | void send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols); |
148 | void send_reset (const sockinfo &dsi); |
166 | void send_reset (const sockinfo &dsi); |
149 | void send_ping (const sockinfo &dsi, u8 pong = 0); |
167 | void send_ping (const sockinfo &dsi, u8 pong = 0); |
150 | void send_data_packet (tap_packet *pkt, bool broadcast = false); |
168 | void send_data_packet (tap_packet *pkt); |
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169 | |
151 | void inject_data_packet (tap_packet *pkt, bool broadcast = false); |
170 | void inject_data_packet (tap_packet *pkt, bool broadcast = false); |
152 | void connect_request (int id); |
171 | void inject_vpn_packet (vpn_packet *pkt, int tos = 0); // for forwarding |
153 | |
172 | |
154 | void send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos = IPTOS_RELIABILITY); |
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155 | void recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi); |
173 | void recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi); |
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174 | void send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos = 0); |
156 | |
175 | |
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176 | void script_init_env (const char *ext); |
157 | void script_node (); |
177 | void script_init_connect_env (); |
158 | const char *script_node_up (int); |
178 | const char *script_node_up (); |
159 | const char *script_node_down (int); |
179 | const char *script_node_down (); |
160 | |
180 | |
161 | void dump_status (); |
181 | void dump_status (); |
162 | |
182 | |
163 | connection(struct vpn *vpn_); |
183 | connection (struct vpn *vpn, conf_node *conf); |
164 | ~connection (); |
184 | ~connection (); |
165 | }; |
185 | }; |
166 | |
186 | |
167 | #endif |
187 | #endif |
168 | |
188 | |