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19 | #ifndef VPE_PROTOCOL_H__ |
19 | #ifndef VPE_PROTOCOL_H__ |
20 | #define VPE_PROTOCOL_H__ |
20 | #define VPE_PROTOCOL_H__ |
21 | |
21 | |
22 | #include <netinet/in.h> |
22 | #include <netinet/in.h> |
23 | #include <netinet/ip.h> // for tos etc. |
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24 | |
23 | |
25 | #include <openssl/evp.h> |
24 | #include <openssl/evp.h> |
26 | #include <openssl/rsa.h> |
25 | #include <openssl/rsa.h> |
27 | |
26 | |
28 | #include "conf.h" |
27 | #include "conf.h" |
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28 | #include "iom.h" |
29 | #include "util.h" |
29 | #include "util.h" |
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30 | #include "sockinfo.h" |
30 | #include "device.h" |
31 | #include "device.h" |
31 | |
32 | #include "connection.h" |
32 | /* Protocol version. Different versions are incompatible, |
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33 | incompatible version have different protocols. |
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34 | */ |
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35 | |
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36 | #define PROTOCOL_MAJOR 2 |
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37 | #define PROTOCOL_MINOR 0 |
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38 | |
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39 | struct vpn; |
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40 | struct vpn_packet; |
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41 | |
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42 | typedef u8 rsachallenge[RSA_KEYLEN - RSA_OVERHEAD]; // challenge data |
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43 | typedef u8 rsaencrdata[RSA_KEYLEN]; // encrypted challenge |
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44 | |
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45 | struct crypto_ctx; |
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46 | |
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47 | enum auth_subtype { AUTH_INIT, AUTH_INITREPLY, AUTH_REPLY }; |
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48 | |
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49 | struct connection |
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50 | { |
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51 | conf_node *conf; |
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52 | struct vpn *vpn; |
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53 | |
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54 | SOCKADDR sa; |
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55 | int retry_cnt; |
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56 | |
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57 | time_t next_retry; // next connection retry |
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58 | time_t next_rekey; // next rekying (actually current reset + reestablishing) |
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59 | time_t last_activity; // time of last packet received |
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60 | |
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61 | u32 oseqno; |
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62 | u32 iseqno; |
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63 | u32 ismask; // bitmask with set bits for each received seqno (input seen mask) |
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64 | |
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65 | pkt_queue queue; |
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66 | |
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67 | crypto_ctx *octx, *ictx; |
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68 | |
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69 | enum conf_node::connectmode connectmode; |
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70 | |
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71 | void reset_dstaddr (); |
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72 | |
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73 | void shutdown (); |
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74 | void reset_connection (); |
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75 | void establish_connection (); |
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76 | void rekey (); |
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77 | |
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78 | void send_auth (auth_subtype subtype, SOCKADDR *sa, rsachallenge *k = 0); |
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79 | void send_reset (SOCKADDR *dsa); |
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80 | void send_ping (SOCKADDR *dss, u8 pong = 0); |
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81 | void send_data_packet (tap_packet *pkt, bool broadcast = false); |
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82 | void inject_data_packet (tap_packet *pkt, bool broadcast = false); |
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83 | void connect_request (int id); |
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84 | |
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85 | void recv_vpn_packet (vpn_packet *pkt, SOCKADDR *rsa); |
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86 | |
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87 | void timer (); |
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88 | |
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89 | connection(struct vpn *vpn_) |
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90 | : vpn(vpn_) |
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91 | { |
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92 | octx = ictx = 0; |
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93 | retry_cnt = 0; |
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94 | connectmode = conf_node::C_ALWAYS; // initial setting |
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95 | reset_connection (); |
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96 | } |
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97 | |
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98 | ~connection () |
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99 | { |
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100 | shutdown (); |
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101 | } |
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102 | |
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103 | void script_node (); |
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104 | const char *script_node_up (); |
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105 | const char *script_node_down (); |
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106 | }; |
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107 | |
33 | |
108 | struct vpn |
34 | struct vpn |
109 | { |
35 | { |
110 | int socket_fd; |
36 | int udpv4_fd; |
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37 | int ipv4_fd; |
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38 | |
111 | int events; |
39 | int events; |
112 | |
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113 | tap_device *tap; |
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114 | |
40 | |
115 | enum { |
41 | enum { |
116 | EVENT_RECONNECT = 1, |
42 | EVENT_RECONNECT = 1, |
117 | EVENT_SHUTDOWN = 2, |
43 | EVENT_SHUTDOWN = 2, |
118 | }; |
44 | }; |
119 | |
45 | |
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46 | void event_cb (tstamp &ts); time_watcher event; |
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47 | |
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48 | tap_device *tap; |
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49 | |
120 | typedef vector<connection *> conns_vector; |
50 | typedef vector<connection *> conns_vector; |
121 | conns_vector conns; |
51 | conns_vector conns; |
122 | |
52 | |
123 | connection *find_router (); |
53 | connection *find_router (); |
124 | |
54 | |
125 | void send_vpn_packet (vpn_packet *pkt, SOCKADDR *sa, int tos = IPTOS_RELIABILITY); |
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126 | void reconnect_all (); |
55 | void reconnect_all (); |
127 | void shutdown_all (); |
56 | void shutdown_all (); |
128 | void connect_request (int id); |
57 | void connect_request (int id); |
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58 | |
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59 | void tap_ev (short revents); io_watcher tap_ev_watcher; |
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60 | void ipv4_ev (short revents); io_watcher ipv4_ev_watcher; |
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61 | void udpv4_ev (short revents); io_watcher udpv4_ev_watcher; |
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62 | |
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63 | void recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi); |
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64 | |
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65 | void send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos = IPTOS_RELIABILITY); |
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66 | void send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos = IPTOS_RELIABILITY); |
129 | |
67 | |
130 | vpn (); |
68 | vpn (); |
131 | ~vpn (); |
69 | ~vpn (); |
132 | |
70 | |
133 | int setup (); |
71 | int setup (); |
134 | void main_loop (); |
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135 | |
72 | |
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73 | void dump_status (); |
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74 | |
136 | const char *script_if_up (); |
75 | const char *script_if_up (int); |
137 | }; |
76 | }; |
138 | |
77 | |
139 | #endif |
78 | #endif |
140 | |
79 | |