1 | /* |
1 | /* |
2 | connection.h -- header for connection.C |
2 | connection.h -- header for connection.C |
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3 | Copyright (C) 2003 Marc Lehmann <pcg@goof.com> |
3 | |
4 | |
4 | This program is free software; you can redistribute it and/or modify |
5 | This program is free software; you can redistribute it and/or modify |
5 | it under the terms of the GNU General Public License as published by |
6 | 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 |
7 | the Free Software Foundation; either version 2 of the License, or |
7 | (at your option) any later version. |
8 | (at your option) any later version. |
… | |
… | |
17 | */ |
18 | */ |
18 | |
19 | |
19 | #ifndef VPE_CONNECTION_H__ |
20 | #ifndef VPE_CONNECTION_H__ |
20 | #define VPE_CONNECTION_H__ |
21 | #define VPE_CONNECTION_H__ |
21 | |
22 | |
22 | #include <netinet/ip.h> // for tos etc. |
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23 | |
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24 | #include <openssl/rand.h> |
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25 | #include <openssl/hmac.h> |
23 | #include <openssl/hmac.h> |
26 | #include <openssl/evp.h> |
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27 | #include <openssl/rsa.h> |
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28 | #include <openssl/err.h> |
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29 | |
24 | |
30 | #include "global.h" |
25 | #include "global.h" |
31 | #include "conf.h" |
26 | #include "conf.h" |
32 | #include "sockinfo.h" |
27 | #include "sockinfo.h" |
33 | #include "util.h" |
28 | #include "util.h" |
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40 | |
35 | |
41 | struct rsaid { |
36 | struct rsaid { |
42 | u8 id[RSA_IDLEN]; // the challenge id |
37 | u8 id[RSA_IDLEN]; // the challenge id |
43 | }; |
38 | }; |
44 | |
39 | |
45 | typedef u8 rsachallenge[RSA_KEYLEN - RSA_OVERHEAD]; // challenge data; |
40 | typedef rsaclear rsachallenge; // challenge data; |
46 | typedef u8 rsaencrdata[RSA_KEYLEN]; // encrypted challenge |
41 | typedef rsacrypt rsaencrdata; // encrypted challenge |
47 | typedef u8 rsaresponse[RSA_RESLEN]; // the encrypted ripemd160 hash |
42 | typedef u8 rsaresponse[RSA_RESLEN]; // the encrypted ripemd160 hash |
48 | |
43 | |
49 | //////////////////////////////////////////////////////////////////////////////////////// |
44 | //////////////////////////////////////////////////////////////////////////////////////// |
50 | |
45 | |
51 | struct crypto_ctx; |
46 | struct crypto_ctx; |
… | |
… | |
79 | }; |
74 | }; |
80 | |
75 | |
81 | u8 type; |
76 | u8 type; |
82 | u8 srcdst, src1, dst1; |
77 | u8 srcdst, src1, dst1; |
83 | |
78 | |
84 | void set_hdr (ptype type, unsigned int dst); |
79 | void set_hdr (ptype type_, unsigned int dst); |
85 | |
80 | |
86 | unsigned int src () const |
81 | unsigned int src () const |
87 | { |
82 | { |
88 | return src1 | ((srcdst >> 4) << 8); |
83 | return src1 | ((srcdst >> 4) << 8); |
89 | } |
84 | } |
… | |
… | |
102 | //////////////////////////////////////////////////////////////////////////////////////// |
97 | //////////////////////////////////////////////////////////////////////////////////////// |
103 | |
98 | |
104 | // a very simple fifo pkt-queue |
99 | // a very simple fifo pkt-queue |
105 | class pkt_queue |
100 | class pkt_queue |
106 | { |
101 | { |
107 | tap_packet *queue[QUEUEDEPTH]; |
102 | net_packet *queue[QUEUEDEPTH]; |
108 | int i, j; |
103 | int i, j; |
109 | |
104 | |
110 | public: |
105 | public: |
111 | |
106 | |
112 | void put (tap_packet *p); |
107 | void put (net_packet *p); |
113 | tap_packet *get (); |
108 | net_packet *get (); |
114 | |
109 | |
115 | pkt_queue (); |
110 | pkt_queue (); |
116 | ~pkt_queue (); |
111 | ~pkt_queue (); |
117 | }; |
112 | }; |
118 | |
113 | |
… | |
… | |
129 | u32 oseqno; |
124 | u32 oseqno; |
130 | sliding_window iseqno; |
125 | sliding_window iseqno; |
131 | |
126 | |
132 | u8 protocol; |
127 | u8 protocol; |
133 | |
128 | |
134 | pkt_queue queue; |
129 | pkt_queue data_queue, vpn_queue; |
135 | |
130 | |
136 | crypto_ctx *octx, *ictx; |
131 | crypto_ctx *octx, *ictx; |
137 | |
132 | |
138 | enum conf_node::connectmode connectmode; |
133 | enum conf_node::connectmode connectmode; |
139 | u8 prot_minor; // minor number of other side |
134 | u8 prot_minor; // minor number of other side |
140 | |
135 | |
141 | void reset_dstaddr (); |
136 | void reset_si (); |
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137 | const sockinfo &forward_si (const sockinfo &si) const; |
142 | |
138 | |
143 | void shutdown (); |
139 | void shutdown (); |
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140 | void connection_established (); |
144 | void reset_connection (); |
141 | void reset_connection (); |
145 | void establish_connection_cb (tstamp &ts); time_watcher establish_connection; |
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146 | void rekey_cb (tstamp &ts); time_watcher rekey; // next rekying (actually current reset + reestablishing) |
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147 | void keepalive_cb (tstamp &ts); time_watcher keepalive; // next keepalive probe |
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148 | |
142 | |
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143 | void establish_connection_cb (time_watcher &w); time_watcher establish_connection; |
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144 | void rekey_cb (time_watcher &w); time_watcher rekey; // next rekying (actually current reset + reestablishing) |
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145 | void keepalive_cb (time_watcher &w); time_watcher keepalive; // next keepalive probe |
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146 | |
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147 | void send_connect_request (int id); |
149 | void send_auth_request (const sockinfo &si, bool initiate); |
148 | void send_auth_request (const sockinfo &si, bool initiate); |
150 | void send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg); |
149 | void send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg); |
151 | void send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols); |
150 | void send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols); |
152 | void send_reset (const sockinfo &dsi); |
151 | void send_reset (const sockinfo &dsi); |
153 | void send_ping (const sockinfo &dsi, u8 pong = 0); |
152 | void send_ping (const sockinfo &dsi, u8 pong = 0); |
154 | void send_data_packet (tap_packet *pkt, bool broadcast = false); |
153 | void send_data_packet (tap_packet *pkt); |
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154 | |
155 | void inject_data_packet (tap_packet *pkt, bool broadcast = false); |
155 | void inject_data_packet (tap_packet *pkt, bool broadcast = false); |
156 | void connect_request (int id); |
156 | void inject_vpn_packet (vpn_packet *pkt, int tos = 0); // for forwarding |
157 | |
157 | |
158 | void send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos = IPTOS_RELIABILITY); |
158 | void send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos = 0); |
159 | void recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi); |
159 | void recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi); |
160 | |
160 | |
161 | void script_node (); |
161 | void script_node (); |
162 | const char *script_node_up (int); |
162 | const char *script_node_up (); |
163 | const char *script_node_down (int); |
163 | const char *script_node_down (); |
164 | |
164 | |
165 | void dump_status (); |
165 | void dump_status (); |
166 | |
166 | |
167 | connection(struct vpn *vpn_); |
167 | connection(struct vpn *vpn_); |
168 | ~connection (); |
168 | ~connection (); |