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26 | #include <openssl/rsa.h> |
26 | #include <openssl/rsa.h> |
27 | |
27 | |
28 | #include "conf.h" |
28 | #include "conf.h" |
29 | #include "iom.h" |
29 | #include "iom.h" |
30 | #include "util.h" |
30 | #include "util.h" |
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31 | #include "sockinfo.h" |
31 | #include "device.h" |
32 | #include "device.h" |
32 | |
33 | |
33 | /* Protocol version. Different versions are incompatible, |
34 | /* Protocol version. Different major versions are incompatible, |
34 | incompatible version have different protocols. |
35 | * different minor versions probably are compatible ;) |
35 | */ |
36 | */ |
36 | |
37 | |
37 | #define PROTOCOL_MAJOR 2 |
38 | #define PROTOCOL_MAJOR 0 |
38 | #define PROTOCOL_MINOR 0 |
39 | #define PROTOCOL_MINOR 0 |
39 | |
40 | |
40 | struct vpn; |
41 | struct vpn; |
41 | struct vpn_packet; |
42 | struct vpn_packet; |
42 | |
43 | |
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44 | struct rsaid { |
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45 | u8 id[RSA_IDLEN]; // the challenge id |
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46 | }; |
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47 | |
43 | typedef u8 rsachallenge[RSA_KEYLEN - RSA_OVERHEAD]; // challenge data |
48 | typedef u8 rsachallenge[RSA_KEYLEN - RSA_OVERHEAD]; // challenge data; |
44 | typedef u8 rsaencrdata[RSA_KEYLEN]; // encrypted challenge |
49 | typedef u8 rsaencrdata[RSA_KEYLEN]; // encrypted challenge |
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50 | typedef u8 rsaresponse[RSA_RESLEN]; // the encrypted ripemd160 hash |
45 | |
51 | |
46 | struct crypto_ctx; |
52 | struct crypto_ctx; |
47 | |
53 | |
48 | // a very simple fifo pkt-queue |
54 | // a very simple fifo pkt-queue |
49 | class pkt_queue |
55 | class pkt_queue |
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58 | |
64 | |
59 | pkt_queue (); |
65 | pkt_queue (); |
60 | ~pkt_queue (); |
66 | ~pkt_queue (); |
61 | }; |
67 | }; |
62 | |
68 | |
63 | enum auth_subtype { AUTH_INIT, AUTH_INITREPLY, AUTH_REPLY }; |
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64 | |
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65 | struct auth_packet; |
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66 | |
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67 | struct connection |
69 | struct connection |
68 | { |
70 | { |
69 | conf_node *conf; |
71 | conf_node *conf; |
70 | struct vpn *vpn; |
72 | struct vpn *vpn; |
71 | u32 seqrand; |
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72 | |
73 | |
73 | SOCKADDR sa; |
74 | sockinfo si; // the current(!) destination ip to send packets to |
74 | int retry_cnt; |
75 | int retry_cnt; |
75 | |
76 | |
76 | tstamp last_activity; // time of last packet received |
77 | tstamp last_activity; // time of last packet received |
77 | |
78 | |
78 | u32 oseqno; |
79 | u32 oseqno; |
79 | sliding_window iseqno; |
80 | sliding_window iseqno; |
80 | |
81 | |
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82 | u8 protocol; |
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83 | |
81 | pkt_queue queue; |
84 | pkt_queue queue; |
82 | |
85 | |
83 | crypto_ctx *octx, *ictx; |
86 | crypto_ctx *octx, *ictx; |
84 | |
87 | |
85 | enum conf_node::connectmode connectmode; |
88 | enum conf_node::connectmode connectmode; |
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89 | u8 prot_minor; // minor number of other side |
86 | |
90 | |
87 | void reset_dstaddr (); |
91 | void reset_dstaddr (); |
88 | |
92 | |
89 | void shutdown (); |
93 | void shutdown (); |
90 | void reset_connection (); |
94 | void reset_connection (); |
91 | void establish_connection_cb (tstamp &ts); time_watcher establish_connection; |
95 | void establish_connection_cb (tstamp &ts); time_watcher establish_connection; |
92 | void rekey_cb (tstamp &ts); time_watcher rekey; // next rekying (actually current reset + reestablishing) |
96 | void rekey_cb (tstamp &ts); time_watcher rekey; // next rekying (actually current reset + reestablishing) |
93 | void keepalive_cb (tstamp &ts); time_watcher keepalive; // next keepalive probe |
97 | void keepalive_cb (tstamp &ts); time_watcher keepalive; // next keepalive probe |
94 | |
98 | |
95 | void send_auth (auth_subtype subtype, SOCKADDR *sa, const rsachallenge *k = 0); |
99 | void send_auth_request (const sockinfo &si, bool initiate); |
96 | void send_reset (SOCKADDR *dsa); |
100 | void send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg); |
97 | void send_ping (SOCKADDR *dss, u8 pong = 0); |
101 | void send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols); |
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102 | void send_reset (const sockinfo &dsi); |
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103 | void send_ping (const sockinfo &dsi, u8 pong = 0); |
98 | void send_data_packet (tap_packet *pkt, bool broadcast = false); |
104 | void send_data_packet (tap_packet *pkt, bool broadcast = false); |
99 | void inject_data_packet (tap_packet *pkt, bool broadcast = false); |
105 | void inject_data_packet (tap_packet *pkt, bool broadcast = false); |
100 | void connect_request (int id); |
106 | void connect_request (int id); |
101 | |
107 | |
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108 | void send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos = IPTOS_RELIABILITY); |
102 | void recv_vpn_packet (vpn_packet *pkt, SOCKADDR *rsa); |
109 | void recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi); |
103 | |
110 | |
104 | void script_node (); |
111 | void script_node (); |
105 | const char *script_node_up (); |
112 | const char *script_node_up (int); |
106 | const char *script_node_down (); |
113 | const char *script_node_down (int); |
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114 | |
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115 | void dump_status (); |
107 | |
116 | |
108 | connection(struct vpn *vpn_); |
117 | connection(struct vpn *vpn_); |
109 | ~connection (); |
118 | ~connection (); |
110 | }; |
119 | }; |
111 | |
120 | |
112 | struct vpn |
121 | struct vpn |
113 | { |
122 | { |
114 | int socket_fd; |
123 | int udpv4_fd; |
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124 | int ipv4_fd; |
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125 | |
115 | int events; |
126 | int events; |
116 | |
127 | |
117 | enum { |
128 | enum { |
118 | EVENT_RECONNECT = 1, |
129 | EVENT_RECONNECT = 1, |
119 | EVENT_SHUTDOWN = 2, |
130 | EVENT_SHUTDOWN = 2, |
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126 | typedef vector<connection *> conns_vector; |
137 | typedef vector<connection *> conns_vector; |
127 | conns_vector conns; |
138 | conns_vector conns; |
128 | |
139 | |
129 | connection *find_router (); |
140 | connection *find_router (); |
130 | |
141 | |
131 | void send_vpn_packet (vpn_packet *pkt, SOCKADDR *sa, int tos = IPTOS_RELIABILITY); |
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132 | void reconnect_all (); |
142 | void reconnect_all (); |
133 | void shutdown_all (); |
143 | void shutdown_all (); |
134 | void connect_request (int id); |
144 | void connect_request (int id); |
135 | |
145 | |
136 | void vpn_ev (short revents); io_watcher vpn_ev_watcher; |
146 | void tap_ev (short revents); io_watcher tap_ev_watcher; |
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147 | void ipv4_ev (short revents); io_watcher ipv4_ev_watcher; |
137 | void udp_ev (short revents); io_watcher udp_ev_watcher; |
148 | void udpv4_ev (short revents); io_watcher udpv4_ev_watcher; |
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149 | |
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150 | void recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi); |
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151 | |
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152 | void send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos = IPTOS_RELIABILITY); |
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153 | void send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos = IPTOS_RELIABILITY); |
138 | |
154 | |
139 | vpn (); |
155 | vpn (); |
140 | ~vpn (); |
156 | ~vpn (); |
141 | |
157 | |
142 | int setup (); |
158 | int setup (); |
143 | |
159 | |
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160 | void dump_status (); |
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161 | |
144 | const char *script_if_up (); |
162 | const char *script_if_up (int); |
145 | }; |
163 | }; |
146 | |
164 | |
147 | #endif |
165 | #endif |
148 | |
166 | |