1 | /* |
1 | /* |
2 | connection.C -- manage a single connection |
2 | connection.C -- manage a single connection |
3 | Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de> |
3 | Copyright (C) 2003-2008,2010,2011,2013 Marc Lehmann <gvpe@schmorp.de> |
4 | |
4 | |
5 | This file is part of GVPE. |
5 | This file is part of GVPE. |
6 | |
6 | |
7 | GVPE is free software; you can redistribute it and/or modify it |
7 | GVPE is free software; you can redistribute it and/or modify it |
8 | under the terms of the GNU General Public License as published by the |
8 | under the terms of the GNU General Public License as published by the |
… | |
… | |
43 | #include "conf.h" |
43 | #include "conf.h" |
44 | #include "slog.h" |
44 | #include "slog.h" |
45 | #include "device.h" |
45 | #include "device.h" |
46 | #include "vpn.h" |
46 | #include "vpn.h" |
47 | #include "connection.h" |
47 | #include "connection.h" |
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48 | #include "hkdf.h" |
48 | |
49 | |
49 | #include "netcompat.h" |
50 | #include "netcompat.h" |
50 | |
51 | |
51 | #if !HAVE_RAND_PSEUDO_BYTES |
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52 | # define RAND_pseudo_bytes RAND_bytes |
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53 | #endif |
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54 | |
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55 | #define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic |
52 | #define MAGIC "gvpe\xbd\xc6\xdb\x82" // 8 bytes of magic |
56 | |
53 | |
57 | #define ULTRA_FAST 1 |
54 | #define ULTRA_FAST 1 |
58 | #define HLOG 15 |
55 | #define HLOG 15 |
59 | #include "lzf/lzf.h" |
56 | #include "lzf/lzf.h" |
60 | #include "lzf/lzf_c.c" |
57 | #include "lzf/lzf_c.c" |
… | |
… | |
63 | ////////////////////////////////////////////////////////////////////////////// |
60 | ////////////////////////////////////////////////////////////////////////////// |
64 | |
61 | |
65 | static std::queue< std::pair<run_script_cb *, const char *> > rs_queue; |
62 | static std::queue< std::pair<run_script_cb *, const char *> > rs_queue; |
66 | static ev::child rs_child_ev; |
63 | static ev::child rs_child_ev; |
67 | |
64 | |
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65 | namespace |
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66 | { |
68 | void // c++ requires external linkage here, apparently :( |
67 | void // c++ requires external linkage here, apparently :( |
69 | rs_child_cb (ev::child &w, int revents) |
68 | rs_child_cb (ev::child &w, int revents) |
70 | { |
69 | { |
71 | w.stop (); |
70 | w.stop (); |
72 | |
71 | |
73 | if (rs_queue.empty ()) |
72 | if (rs_queue.empty ()) |
74 | return; |
73 | return; |
75 | |
74 | |
76 | pid_t pid = run_script (*rs_queue.front ().first, false); |
75 | pid_t pid = run_script (*rs_queue.front ().first, false); |
77 | if (pid) |
76 | if (pid) |
78 | { |
77 | { |
79 | w.set (pid); |
78 | w.set (pid); |
80 | w.start (); |
79 | w.start (); |
81 | } |
80 | } |
82 | else |
81 | else |
83 | slog (L_WARN, rs_queue.front ().second); |
82 | slog (L_WARN, rs_queue.front ().second); |
84 | |
83 | |
85 | delete rs_queue.front ().first; |
84 | delete rs_queue.front ().first; |
86 | rs_queue.pop (); |
85 | rs_queue.pop (); |
87 | } |
86 | } |
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87 | }; |
88 | |
88 | |
89 | // despite the fancy name, this is quite a hack |
89 | // despite the fancy name, this is quite a hack |
90 | static void |
90 | static void |
91 | run_script_queued (run_script_cb *cb, const char *warnmsg) |
91 | run_script_queued (run_script_cb *cb, const char *warnmsg) |
92 | { |
92 | { |
… | |
… | |
104 | struct crypto_ctx |
104 | struct crypto_ctx |
105 | { |
105 | { |
106 | EVP_CIPHER_CTX cctx; |
106 | EVP_CIPHER_CTX cctx; |
107 | HMAC_CTX hctx; |
107 | HMAC_CTX hctx; |
108 | |
108 | |
109 | crypto_ctx (const rsachallenge &challenge, int enc); |
109 | crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc); |
110 | ~crypto_ctx (); |
110 | ~crypto_ctx (); |
111 | }; |
111 | }; |
112 | |
112 | |
113 | crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc) |
113 | crypto_ctx::crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc) |
114 | { |
114 | { |
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115 | ecdh_key s; |
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116 | |
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117 | curve25519_combine (a, b, s); |
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118 | |
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119 | { |
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120 | u8 mac_key[MAC_KEYSIZE]; |
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121 | static const unsigned char mac_info[] = "gvpe mac key"; |
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122 | |
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123 | hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt)); |
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124 | kdf.extract (auth2.rsa.ikm, sizeof (auth2.rsa.ikm)); |
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125 | kdf.extract (auth1.rsa.mac_key, sizeof (auth1.rsa.mac_key)); |
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126 | kdf.extract (s, sizeof (s)); |
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127 | kdf.extract_done (); |
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128 | kdf.expand (mac_key, sizeof (mac_key), mac_info, sizeof (mac_info)); |
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129 | |
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130 | HMAC_CTX_init (&hctx); |
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131 | require (HMAC_Init_ex (&hctx, mac_key, MAC_KEYSIZE, MAC_DIGEST (), 0)); |
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132 | } |
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133 | |
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134 | { |
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135 | u8 cipher_key[CIPHER_KEYSIZE]; |
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136 | static const unsigned char cipher_info[] = "gvpe cipher key"; |
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137 | |
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138 | hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt)); |
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139 | kdf.extract (auth2.rsa.ikm, sizeof (auth2.rsa.ikm)); |
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140 | kdf.extract (auth1.rsa.cipher_key, sizeof (auth1.rsa.cipher_key)); |
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141 | kdf.extract (s, sizeof (s)); |
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142 | kdf.extract_done (); |
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143 | kdf.expand (cipher_key, sizeof (cipher_key), cipher_info, sizeof (cipher_info)); |
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144 | |
115 | EVP_CIPHER_CTX_init (&cctx); |
145 | EVP_CIPHER_CTX_init (&cctx); |
116 | require (EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc)); |
146 | require (EVP_CipherInit_ex (&cctx, CIPHER (), 0, cipher_key, 0, enc)); |
117 | HMAC_CTX_init (&hctx); |
147 | } |
118 | HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0); |
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119 | } |
148 | } |
120 | |
149 | |
121 | crypto_ctx::~crypto_ctx () |
150 | crypto_ctx::~crypto_ctx () |
122 | { |
151 | { |
123 | require (EVP_CIPHER_CTX_cleanup (&cctx)); |
152 | require (EVP_CIPHER_CTX_cleanup (&cctx)); |
124 | HMAC_CTX_cleanup (&hctx); |
153 | HMAC_CTX_cleanup (&hctx); |
125 | } |
154 | } |
126 | |
155 | |
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156 | static inline void |
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157 | auth_encrypt (RSA *key, const auth_data &auth, auth_encr &encr) |
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158 | { |
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159 | if (RSA_public_encrypt (sizeof (auth.rsa), |
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160 | (unsigned char *)&auth.rsa, (unsigned char *)&encr.rsa, |
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161 | key, RSA_PKCS1_OAEP_PADDING) < 0) |
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162 | fatal ("RSA_public_encrypt error"); |
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163 | } |
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164 | |
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165 | static inline bool |
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166 | auth_decrypt (RSA *key, const auth_encr &encr, auth_data &auth) |
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167 | { |
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168 | u8 rsa_decrypt[RSA_KEYLEN]; |
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169 | |
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170 | if (RSA_private_decrypt (sizeof (encr.rsa), |
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171 | (const unsigned char *)&encr.rsa, (unsigned char *)rsa_decrypt, |
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172 | key, RSA_PKCS1_OAEP_PADDING) != sizeof (auth.rsa)) |
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173 | return 0; |
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174 | |
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175 | memcpy (&auth.rsa, rsa_decrypt, sizeof (auth.rsa)); |
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176 | |
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177 | return 1; |
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178 | } |
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179 | |
127 | static void |
180 | static void |
128 | rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h) |
181 | auth_hash (const auth_data &auth, auth_mac &mac) |
129 | { |
182 | { |
130 | EVP_MD_CTX ctx; |
183 | HMAC_CTX ctx; |
131 | |
184 | |
132 | EVP_MD_CTX_init (&ctx); |
185 | HMAC_CTX_init (&ctx); |
133 | require (EVP_DigestInit (&ctx, RSA_HASH)); |
186 | require (HMAC_Init_ex (&ctx, auth.rsa.auth_key, sizeof (auth.rsa.auth_key), AUTH_DIGEST (), 0)); |
134 | require (EVP_DigestUpdate(&ctx, &chg, sizeof chg)); |
187 | require (HMAC_Update (&ctx, (const unsigned char *)&auth, sizeof auth)); |
135 | require (EVP_DigestUpdate(&ctx, &id, sizeof id)); |
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136 | require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0)); |
188 | require (HMAC_Final (&ctx, (unsigned char *)&mac, 0)); |
137 | EVP_MD_CTX_cleanup (&ctx); |
189 | HMAC_CTX_cleanup (&ctx); |
138 | } |
190 | } |
139 | |
191 | |
140 | struct rsa_entry |
192 | void |
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193 | connection::generate_auth_data () |
141 | { |
194 | { |
142 | tstamp expire; |
195 | if (auth_expire < ev_now ()) |
143 | rsaid id; |
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144 | rsachallenge chg; |
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145 | }; |
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146 | |
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147 | struct rsa_cache : list<rsa_entry> |
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148 | { |
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149 | inline void cleaner_cb (ev::timer &w, int revents); ev::timer cleaner; |
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150 | |
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151 | bool find (const rsaid &id, rsachallenge &chg) |
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152 | { |
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153 | for (iterator i = begin (); i != end (); ++i) |
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154 | { |
196 | { |
155 | if (!memcmp (&id, &i->id, sizeof id) && i->expire > ev_now ()) |
197 | // request data |
156 | { |
198 | RAND_pseudo_bytes ((unsigned char *)&snd_auth.rsa, sizeof snd_auth.rsa); |
157 | memcpy (&chg, &i->chg, sizeof chg); |
199 | curve25519_generate (snd_ecdh_a, snd_auth.ecdh); |
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200 | auth_hash (snd_auth, snd_auth_mac); |
158 | |
201 | |
159 | erase (i); |
202 | // eventual response data |
160 | return true; |
203 | curve25519_generate (rcv_ecdh_a, rcv_ecdh_b); |
161 | } |
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162 | } |
204 | } |
163 | |
205 | |
164 | if (!cleaner.is_active ()) |
206 | // every use prolongs the expiry |
165 | cleaner.again (); |
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166 | |
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167 | return false; |
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168 | } |
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169 | |
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170 | void gen (rsaid &id, rsachallenge &chg) |
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171 | { |
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172 | rsa_entry e; |
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173 | |
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174 | RAND_bytes ((unsigned char *)&id, sizeof id); |
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175 | RAND_bytes ((unsigned char *)&chg, sizeof chg); |
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176 | |
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177 | e.expire = ev_now () + RSA_TTL; |
207 | auth_expire = ev_now () + AUTH_TTL; |
178 | e.id = id; |
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179 | memcpy (&e.chg, &chg, sizeof chg); |
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180 | |
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181 | push_back (e); |
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182 | |
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183 | if (!cleaner.is_active ()) |
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184 | cleaner.again (); |
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185 | } |
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186 | |
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187 | rsa_cache () |
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188 | { |
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189 | cleaner.set<rsa_cache, &rsa_cache::cleaner_cb> (this); |
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190 | cleaner.set (RSA_TTL, RSA_TTL); |
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191 | } |
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192 | |
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193 | } rsa_cache; |
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194 | |
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195 | void rsa_cache::cleaner_cb (ev::timer &w, int revents) |
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196 | { |
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197 | if (empty ()) |
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198 | w.stop (); |
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199 | else |
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200 | { |
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201 | for (iterator i = begin (); i != end (); ) |
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202 | if (i->expire <= ev_now ()) |
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203 | i = erase (i); |
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204 | else |
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205 | ++i; |
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206 | } |
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207 | } |
208 | } |
208 | |
209 | |
209 | ////////////////////////////////////////////////////////////////////////////// |
210 | ////////////////////////////////////////////////////////////////////////////// |
210 | |
211 | |
211 | pkt_queue::pkt_queue (double max_ttl, int max_queue) |
212 | pkt_queue::pkt_queue (double max_ttl, int max_queue) |
… | |
… | |
225 | delete p; |
226 | delete p; |
226 | |
227 | |
227 | delete [] queue; |
228 | delete [] queue; |
228 | } |
229 | } |
229 | |
230 | |
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231 | void |
230 | void pkt_queue::expire_cb (ev::timer &w, int revents) |
232 | pkt_queue::expire_cb (ev::timer &w, int revents) |
231 | { |
233 | { |
232 | ev_tstamp expire = ev_now () - max_ttl; |
234 | ev_tstamp expire = ev_now () - max_ttl; |
233 | |
235 | |
234 | for (;;) |
236 | for (;;) |
235 | { |
237 | { |
… | |
… | |
246 | |
248 | |
247 | delete get (); |
249 | delete get (); |
248 | } |
250 | } |
249 | } |
251 | } |
250 | |
252 | |
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253 | void |
251 | void pkt_queue::put (net_packet *p) |
254 | pkt_queue::put (net_packet *p) |
252 | { |
255 | { |
253 | ev_tstamp now = ev_now (); |
256 | ev_tstamp now = ev_now (); |
254 | |
257 | |
255 | // start expiry timer |
258 | // start expiry timer |
256 | if (empty ()) |
259 | if (empty ()) |
… | |
… | |
265 | queue[i].tstamp = now; |
268 | queue[i].tstamp = now; |
266 | |
269 | |
267 | i = ni; |
270 | i = ni; |
268 | } |
271 | } |
269 | |
272 | |
270 | net_packet *pkt_queue::get () |
273 | net_packet * |
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274 | pkt_queue::get () |
271 | { |
275 | { |
272 | if (empty ()) |
276 | if (empty ()) |
273 | return 0; |
277 | return 0; |
274 | |
278 | |
275 | net_packet *p = queue[j].pkt; |
279 | net_packet *p = queue[j].pkt; |
… | |
… | |
299 | |
303 | |
300 | bool can (const sockinfo &si) { return can((u32)si.host); } |
304 | bool can (const sockinfo &si) { return can((u32)si.host); } |
301 | bool can (u32 host); |
305 | bool can (u32 host); |
302 | }; |
306 | }; |
303 | |
307 | |
304 | net_rate_limiter auth_rate_limiter, reset_rate_limiter; |
308 | static net_rate_limiter auth_rate_limiter, reset_rate_limiter; |
305 | |
309 | |
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310 | bool |
306 | bool net_rate_limiter::can (u32 host) |
311 | net_rate_limiter::can (u32 host) |
307 | { |
312 | { |
308 | iterator i; |
313 | iterator i; |
309 | |
314 | |
310 | for (i = begin (); i != end (); ) |
315 | for (i = begin (); i != end (); ) |
311 | if (i->host == host) |
316 | if (i->host == host) |
… | |
… | |
358 | |
363 | |
359 | ///////////////////////////////////////////////////////////////////////////// |
364 | ///////////////////////////////////////////////////////////////////////////// |
360 | |
365 | |
361 | unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE]; |
366 | unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE]; |
362 | |
367 | |
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368 | void |
363 | void hmac_packet::hmac_gen (crypto_ctx *ctx) |
369 | hmac_packet::hmac_gen (crypto_ctx *ctx) |
364 | { |
370 | { |
365 | unsigned int xlen; |
371 | unsigned int xlen; |
366 | |
372 | |
367 | HMAC_CTX *hctx = &ctx->hctx; |
373 | HMAC_CTX *hctx = &ctx->hctx; |
368 | |
374 | |
369 | HMAC_Init_ex (hctx, 0, 0, 0, 0); |
375 | require (HMAC_Init_ex (hctx, 0, 0, 0, 0)); |
370 | HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet), |
376 | require (HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet), |
371 | len - sizeof (hmac_packet)); |
377 | len - sizeof (hmac_packet))); |
372 | HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen); |
378 | require (HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen)); |
373 | } |
379 | } |
374 | |
380 | |
375 | void |
381 | void |
376 | hmac_packet::hmac_set (crypto_ctx *ctx) |
382 | hmac_packet::hmac_set (crypto_ctx *ctx) |
377 | { |
383 | { |
… | |
… | |
386 | hmac_gen (ctx); |
392 | hmac_gen (ctx); |
387 | |
393 | |
388 | return !memcmp (hmac, hmac_digest, HMACLENGTH); |
394 | return !memcmp (hmac, hmac_digest, HMACLENGTH); |
389 | } |
395 | } |
390 | |
396 | |
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397 | void |
391 | void vpn_packet::set_hdr (ptype type_, unsigned int dst) |
398 | vpn_packet::set_hdr (ptype type_, unsigned int dst) |
392 | { |
399 | { |
393 | type = type_; |
400 | type = type_; |
394 | |
401 | |
395 | int src = THISNODE->id; |
402 | int src = THISNODE->id; |
396 | |
403 | |
… | |
… | |
401 | |
408 | |
402 | #define MAXVPNDATA (MAX_MTU - 6 - 6) |
409 | #define MAXVPNDATA (MAX_MTU - 6 - 6) |
403 | #define DATAHDR (sizeof (u32) + RAND_SIZE) |
410 | #define DATAHDR (sizeof (u32) + RAND_SIZE) |
404 | |
411 | |
405 | struct vpndata_packet : vpn_packet |
412 | struct vpndata_packet : vpn_packet |
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413 | { |
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414 | u8 data[MAXVPNDATA + DATAHDR]; // seqno |
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415 | |
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416 | void setup (connection *conn, int dst, u8 *d, u32 len, u32 seqno); |
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417 | tap_packet *unpack (connection *conn, u32 &seqno); |
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418 | |
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419 | private: |
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420 | const u32 data_hdr_size () const |
406 | { |
421 | { |
407 | u8 data[MAXVPNDATA + DATAHDR]; // seqno |
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408 | |
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409 | void setup (connection *conn, int dst, u8 *d, u32 len, u32 seqno); |
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410 | tap_packet *unpack (connection *conn, u32 &seqno); |
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411 | private: |
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412 | |
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413 | const u32 data_hdr_size () const |
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414 | { |
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415 | return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR; |
422 | return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR; |
416 | } |
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417 | }; |
423 | } |
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424 | }; |
418 | |
425 | |
419 | void |
426 | void |
420 | vpndata_packet::setup (connection *conn, int dst, u8 *d, u32 l, u32 seqno) |
427 | vpndata_packet::setup (connection *conn, int dst, u8 *d, u32 l, u32 seqno) |
421 | { |
428 | { |
422 | EVP_CIPHER_CTX *cctx = &conn->octx->cctx; |
429 | EVP_CIPHER_CTX *cctx = &conn->octx->cctx; |
… | |
… | |
424 | ptype type = PT_DATA_UNCOMPRESSED; |
431 | ptype type = PT_DATA_UNCOMPRESSED; |
425 | |
432 | |
426 | #if ENABLE_COMPRESSION |
433 | #if ENABLE_COMPRESSION |
427 | u8 cdata[MAX_MTU]; |
434 | u8 cdata[MAX_MTU]; |
428 | |
435 | |
429 | if (conn->features & ENABLE_COMPRESSION) |
436 | if (conn->features & FEATURE_COMPRESSION) |
430 | { |
437 | { |
431 | u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7); |
438 | u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7); |
432 | |
439 | |
433 | if (cl) |
440 | if (cl) |
434 | { |
441 | { |
… | |
… | |
440 | d[1] = cl; |
447 | d[1] = cl; |
441 | } |
448 | } |
442 | } |
449 | } |
443 | #endif |
450 | #endif |
444 | |
451 | |
445 | require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0)); |
452 | require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 1)); |
446 | |
453 | |
447 | struct { |
454 | struct { |
448 | #if RAND_SIZE |
455 | #if RAND_SIZE |
449 | u8 rnd[RAND_SIZE]; |
456 | u8 rnd[RAND_SIZE]; |
450 | #endif |
457 | #endif |
… | |
… | |
483 | int outl = 0, outl2; |
490 | int outl = 0, outl2; |
484 | tap_packet *p = new tap_packet; |
491 | tap_packet *p = new tap_packet; |
485 | u8 *d; |
492 | u8 *d; |
486 | u32 l = len - data_hdr_size (); |
493 | u32 l = len - data_hdr_size (); |
487 | |
494 | |
488 | require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0)); |
495 | require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 0)); |
489 | |
496 | |
490 | #if ENABLE_COMPRESSION |
497 | #if ENABLE_COMPRESSION |
491 | u8 cdata[MAX_MTU]; |
498 | u8 cdata[MAX_MTU]; |
492 | |
499 | |
493 | if (type == PT_DATA_COMPRESSED) |
500 | if (type == PT_DATA_COMPRESSED) |
… | |
… | |
535 | } |
542 | } |
536 | }; |
543 | }; |
537 | |
544 | |
538 | struct config_packet : vpn_packet |
545 | struct config_packet : vpn_packet |
539 | { |
546 | { |
540 | // actually, hmaclen cannot be checked because the hmac |
|
|
541 | // field comes before this data, so peers with other |
|
|
542 | // hmacs simply will not work. |
|
|
543 | u8 prot_major, prot_minor, randsize, hmaclen; |
547 | u8 prot_major, prot_minor, randsize; |
544 | u8 flags, challengelen, features, pad3; |
548 | u8 flags, features, pad6, pad7, pad8; |
545 | u32 cipher_nid, digest_nid, hmac_nid; |
549 | u32 cipher_nid, mac_nid, auth_nid; |
546 | |
550 | |
547 | void setup (ptype type, int dst); |
551 | void setup (ptype type, int dst); |
548 | bool chk_config () const; |
552 | bool chk_config () const; |
549 | |
553 | |
550 | static u8 get_features () |
554 | static u8 get_features () |
… | |
… | |
561 | #endif |
565 | #endif |
562 | return f; |
566 | return f; |
563 | } |
567 | } |
564 | }; |
568 | }; |
565 | |
569 | |
|
|
570 | void |
566 | void config_packet::setup (ptype type, int dst) |
571 | config_packet::setup (ptype type, int dst) |
567 | { |
572 | { |
568 | prot_major = PROTOCOL_MAJOR; |
573 | prot_major = PROTOCOL_MAJOR; |
569 | prot_minor = PROTOCOL_MINOR; |
574 | prot_minor = PROTOCOL_MINOR; |
570 | randsize = RAND_SIZE; |
575 | randsize = RAND_SIZE; |
571 | hmaclen = HMACLENGTH; |
|
|
572 | flags = 0; |
576 | flags = 0; |
573 | challengelen = sizeof (rsachallenge); |
|
|
574 | features = get_features (); |
577 | features = get_features (); |
575 | |
578 | |
576 | cipher_nid = htonl (EVP_CIPHER_nid (CIPHER)); |
579 | cipher_nid = htonl (EVP_CIPHER_nid (CIPHER ())); |
577 | digest_nid = htonl (EVP_MD_type (RSA_HASH)); |
|
|
578 | hmac_nid = htonl (EVP_MD_type (DIGEST)); |
580 | mac_nid = htonl (EVP_MD_type (MAC_DIGEST ())); |
|
|
581 | auth_nid = htonl (EVP_MD_type (AUTH_DIGEST ())); |
579 | |
582 | |
580 | len = sizeof (*this) - sizeof (net_packet); |
583 | len = sizeof (*this) - sizeof (net_packet); |
581 | set_hdr (type, dst); |
584 | set_hdr (type, dst); |
582 | } |
585 | } |
583 | |
586 | |
|
|
587 | bool |
584 | bool config_packet::chk_config () const |
588 | config_packet::chk_config () const |
585 | { |
589 | { |
586 | if (prot_major != PROTOCOL_MAJOR) |
590 | if (prot_major != PROTOCOL_MAJOR) |
587 | slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR); |
591 | slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR); |
588 | else if (randsize != RAND_SIZE) |
592 | else if (randsize != RAND_SIZE) |
589 | slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE); |
593 | slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE); |
590 | else if (hmaclen != HMACLENGTH) |
|
|
591 | slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH); |
|
|
592 | else if (challengelen != sizeof (rsachallenge)) |
|
|
593 | slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge)); |
|
|
594 | else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER))) |
594 | else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER ()))) |
595 | slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER)); |
595 | slog (L_WARN, _("cipher algo mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER ())); |
596 | else if (digest_nid != htonl (EVP_MD_type (RSA_HASH))) |
|
|
597 | slog (L_WARN, _("digest mismatch (remote %x <=> local %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH)); |
|
|
598 | else if (hmac_nid != htonl (EVP_MD_type (DIGEST))) |
596 | else if (mac_nid != htonl (EVP_MD_type (MAC_DIGEST ()))) |
599 | slog (L_WARN, _("hmac mismatch (remote %x <=> local %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST)); |
597 | slog (L_WARN, _("mac algo mismatch (remote %x <=> local %x)"), ntohl (mac_nid), EVP_MD_type (MAC_DIGEST ())); |
|
|
598 | else if (auth_nid != htonl (EVP_MD_type (AUTH_DIGEST ()))) |
|
|
599 | slog (L_WARN, _("auth algo mismatch (remote %x <=> local %x)"), ntohl (auth_nid), EVP_MD_type (AUTH_DIGEST ())); |
600 | else |
600 | else |
601 | return true; |
601 | return true; |
602 | |
602 | |
603 | return false; |
603 | return false; |
604 | } |
604 | } |
605 | |
605 | |
606 | struct auth_req_packet : config_packet |
606 | struct auth_req_packet : config_packet // UNPROTECTED |
607 | { |
607 | { |
608 | char magic[8]; |
608 | char magic[8]; |
609 | u8 initiate; // false if this is just an automatic reply |
609 | u8 initiate; // false if this is just an automatic reply |
610 | u8 protocols; // supported protocols (will be patched on forward) |
610 | u8 protocols; // supported protocols (will be patched on forward) |
611 | u8 pad2, pad3; |
611 | u8 pad2, pad3; |
612 | rsaid id; |
612 | auth_encr encr; |
613 | rsaencrdata encr; |
|
|
614 | |
613 | |
615 | auth_req_packet (int dst, bool initiate_, u8 protocols_) |
614 | auth_req_packet (int dst, bool initiate_, u8 protocols_) |
616 | { |
615 | { |
617 | config_packet::setup (PT_AUTH_REQ, dst); |
616 | config_packet::setup (PT_AUTH_REQ, dst); |
618 | strncpy (magic, MAGIC, 8); |
617 | memcpy (magic, MAGIC, 8); |
619 | initiate = !!initiate_; |
618 | initiate = !!initiate_; |
620 | protocols = protocols_; |
619 | protocols = protocols_; |
621 | |
620 | |
622 | len = sizeof (*this) - sizeof (net_packet); |
621 | len = sizeof (*this) - sizeof (net_packet); |
623 | } |
622 | } |
624 | }; |
623 | }; |
625 | |
624 | |
626 | struct auth_res_packet : config_packet |
625 | struct auth_res_packet : config_packet // UNPROTECTED |
627 | { |
626 | { |
628 | rsaid id; |
|
|
629 | u8 pad1, pad2, pad3; |
|
|
630 | u8 response_len; // encrypted length |
|
|
631 | rsaresponse response; |
627 | auth_response response; |
632 | |
628 | |
633 | auth_res_packet (int dst) |
629 | auth_res_packet (int dst) |
634 | { |
630 | { |
635 | config_packet::setup (PT_AUTH_RES, dst); |
631 | config_packet::setup (PT_AUTH_RES, dst); |
636 | |
632 | |
… | |
… | |
670 | }; |
666 | }; |
671 | |
667 | |
672 | ///////////////////////////////////////////////////////////////////////////// |
668 | ///////////////////////////////////////////////////////////////////////////// |
673 | |
669 | |
674 | void |
670 | void |
675 | connection::connection_established () |
671 | connection::connection_established (const sockinfo &rsi) |
676 | { |
672 | { |
677 | slog (L_TRACE, _("%s: possible connection establish (ictx %d, octx %d)"), conf->nodename, !!ictx, !!octx); |
673 | if (!have_snd_auth || !have_rcv_auth) |
|
|
674 | return; |
|
|
675 | |
|
|
676 | si = rsi; |
|
|
677 | protocol = rsi.prot; |
|
|
678 | |
|
|
679 | slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."), |
|
|
680 | conf->nodename, (const char *)rsi, |
|
|
681 | is_direct ? "direct" : "forwarded", |
|
|
682 | PROTOCOL_MAJOR, prot_minor); |
|
|
683 | |
|
|
684 | if (::conf.script_node_up) |
|
|
685 | { |
|
|
686 | run_script_cb *cb = new run_script_cb; |
|
|
687 | cb->set<connection, &connection::script_node_up> (this); |
|
|
688 | run_script_queued (cb, _("node-up command execution failed, continuing.")); |
|
|
689 | } |
|
|
690 | |
|
|
691 | delete ictx; ictx = new crypto_ctx (rcv_auth, snd_auth, rcv_ecdh_a, rcv_auth.ecdh, 0); |
|
|
692 | iseqno.reset (ntohl (rcv_auth.rsa.seqno) & 0x7fffffff); |
|
|
693 | |
|
|
694 | delete octx; octx = new crypto_ctx (snd_auth, rcv_auth, snd_ecdh_a, snd_ecdh_b , 1); |
|
|
695 | oseqno = ntohl (snd_auth.rsa.seqno) & 0x7fffffff; |
678 | |
696 | |
679 | if (ictx && octx) |
697 | if (ictx && octx) |
680 | { |
698 | { |
681 | // make sure rekeying timeouts are slightly asymmetric |
699 | // make sure rekeying timeouts are slightly asymmetric |
682 | ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0); |
700 | ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0); |
683 | rekey.start (rekey_interval, rekey_interval); |
701 | rekey.start (rekey_interval, rekey_interval); |
|
|
702 | |
684 | keepalive.start (::conf.keepalive); |
703 | keepalive.start (::conf.keepalive); |
685 | |
704 | |
686 | // send queued packets |
705 | // send queued packets |
687 | if (ictx && octx) |
706 | if (ictx && octx) |
688 | { |
707 | { |
… | |
… | |
696 | { |
715 | { |
697 | if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY); |
716 | if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY); |
698 | delete p; |
717 | delete p; |
699 | } |
718 | } |
700 | } |
719 | } |
|
|
720 | |
|
|
721 | vpn->connection_established (this); |
701 | } |
722 | } |
|
|
723 | #if 0 |
702 | else |
724 | else |
703 | { |
725 | { |
704 | retry_cnt = 0; |
726 | retry_cnt = 0; |
705 | establish_connection.start (5); |
727 | establish_connection.start (5); |
706 | keepalive.stop (); |
728 | keepalive.stop (); |
707 | rekey.stop (); |
729 | rekey.stop (); |
708 | } |
730 | } |
|
|
731 | #endif |
709 | } |
732 | } |
710 | |
733 | |
711 | void |
734 | void |
712 | connection::reset_si () |
735 | connection::reset_si () |
713 | { |
736 | { |
|
|
737 | if (vpn->can_direct (THISNODE, conf)) |
714 | protocol = best_protocol (THISNODE->protocols & conf->protocols); |
738 | protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ()); |
715 | |
739 | else |
716 | // mask out protocols we cannot establish |
|
|
717 | if (!conf->udp_port) protocol &= ~PROT_UDPv4; |
|
|
718 | if (!conf->tcp_port) protocol &= ~PROT_TCPv4; |
|
|
719 | if (!conf->dns_port) protocol &= ~PROT_DNSv4; |
|
|
720 | |
|
|
721 | if (protocol |
|
|
722 | && (!conf->can_direct (THISNODE) |
|
|
723 | || !THISNODE->can_direct (conf))) |
|
|
724 | { |
740 | { |
725 | slog (L_DEBUG, _("%s: direct connection denied"), conf->nodename); |
741 | slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename); |
726 | protocol = 0; |
742 | protocol = 0; |
727 | } |
743 | } |
728 | |
744 | |
729 | si.set (conf, protocol); |
745 | si.set (conf, protocol); |
|
|
746 | |
|
|
747 | is_direct = si.valid (); |
730 | } |
748 | } |
731 | |
749 | |
732 | // ensure sockinfo is valid, forward if necessary |
750 | // ensure sockinfo is valid, forward if necessary |
733 | const sockinfo & |
751 | const sockinfo & |
734 | connection::forward_si (const sockinfo &si) const |
752 | connection::forward_si (const sockinfo &si) const |
735 | { |
753 | { |
736 | if (!si.valid ()) |
754 | if (!si.valid ()) |
737 | { |
755 | { |
738 | connection *r = vpn->find_router (); |
756 | connection *r = vpn->find_router_for (this); |
739 | |
757 | |
740 | if (r) |
758 | if (r) |
741 | { |
759 | { |
742 | slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s (%s)"), |
760 | slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."), |
743 | conf->nodename, r->conf->nodename, (const char *)r->si); |
761 | conf->nodename, r->conf->nodename); |
744 | return r->si; |
762 | return r->si; |
745 | } |
763 | } |
746 | else |
764 | else |
747 | slog (L_DEBUG, _("%s: node unreachable, no common protocol"), |
765 | slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."), |
748 | conf->nodename); |
766 | conf->nodename); |
749 | } |
767 | } |
750 | |
768 | |
751 | return si; |
769 | return si; |
752 | } |
770 | } |
… | |
… | |
762 | connection::send_ping (const sockinfo &si, u8 pong) |
780 | connection::send_ping (const sockinfo &si, u8 pong) |
763 | { |
781 | { |
764 | ping_packet *pkt = new ping_packet; |
782 | ping_packet *pkt = new ping_packet; |
765 | |
783 | |
766 | pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING); |
784 | pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING); |
|
|
785 | |
|
|
786 | slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si); |
767 | send_vpn_packet (pkt, si, IPTOS_LOWDELAY); |
787 | send_vpn_packet (pkt, si, IPTOS_LOWDELAY); |
768 | |
788 | |
769 | delete pkt; |
789 | delete pkt; |
770 | } |
790 | } |
771 | |
791 | |
… | |
… | |
786 | void |
806 | void |
787 | connection::send_auth_request (const sockinfo &si, bool initiate) |
807 | connection::send_auth_request (const sockinfo &si, bool initiate) |
788 | { |
808 | { |
789 | auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols); |
809 | auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols); |
790 | |
810 | |
791 | rsachallenge chg; |
811 | generate_auth_data (); |
792 | rsa_cache.gen (pkt->id, chg); |
|
|
793 | rsa_encrypt (conf->rsa_key, chg, pkt->encr); |
812 | auth_encrypt (conf->rsa_key, snd_auth, pkt->encr); |
794 | |
813 | |
795 | slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si); |
814 | slog (L_TRACE, "%s << PT_AUTH_REQ [%s]", conf->nodename, (const char *)si); |
796 | |
|
|
797 | send_vpn_packet (pkt, si, IPTOS_RELIABILITY | IPTOS_LOWDELAY); // rsa is very very costly |
815 | send_vpn_packet (pkt, si, IPTOS_RELIABILITY | IPTOS_LOWDELAY); // rsa is very very costly |
798 | |
816 | |
799 | delete pkt; |
817 | delete pkt; |
800 | } |
818 | } |
801 | |
819 | |
802 | void |
820 | void |
803 | connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg) |
821 | connection::send_auth_response (const sockinfo &si) |
804 | { |
822 | { |
805 | auth_res_packet *pkt = new auth_res_packet (conf->id); |
823 | auth_res_packet *pkt = new auth_res_packet (conf->id); |
806 | |
824 | |
807 | pkt->id = id; |
825 | auth_hash (rcv_auth, pkt->response.mac); |
|
|
826 | memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof (rcv_ecdh_b)); |
808 | |
827 | |
809 | rsa_hash (id, chg, pkt->response); |
|
|
810 | |
|
|
811 | pkt->hmac_set (octx); |
|
|
812 | |
|
|
813 | slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si); |
828 | slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si); |
814 | |
|
|
815 | send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly |
829 | send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly |
816 | |
830 | |
817 | delete pkt; |
831 | delete pkt; |
818 | } |
832 | } |
819 | |
833 | |
820 | void |
834 | void |
821 | connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols) |
835 | connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols) |
822 | { |
836 | { |
823 | slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)", |
837 | slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename, |
824 | conf->id, rid, (const char *)rsi); |
838 | vpn->conns[rid - 1]->conf->nodename, (const char *)rsi, |
|
|
839 | conf->protocols); |
825 | |
840 | |
826 | connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols); |
841 | connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols); |
827 | |
842 | |
828 | r->hmac_set (octx); |
843 | r->hmac_set (octx); |
829 | send_vpn_packet (r, si); |
844 | send_vpn_packet (r, si); |
… | |
… | |
832 | } |
847 | } |
833 | |
848 | |
834 | inline void |
849 | inline void |
835 | connection::establish_connection_cb (ev::timer &w, int revents) |
850 | connection::establish_connection_cb (ev::timer &w, int revents) |
836 | { |
851 | { |
837 | if (!ictx |
852 | if (!(ictx && octx) |
838 | && conf != THISNODE |
853 | && conf != THISNODE |
839 | && connectmode != conf_node::C_NEVER |
854 | && connectmode != conf_node::C_NEVER |
840 | && connectmode != conf_node::C_DISABLED |
855 | && connectmode != conf_node::C_DISABLED |
841 | && !w.is_active ()) |
856 | && !w.is_active ()) |
842 | { |
857 | { |
… | |
… | |
856 | |
871 | |
857 | reset_si (); |
872 | reset_si (); |
858 | |
873 | |
859 | bool slow = si.prot & PROT_SLOW; |
874 | bool slow = si.prot & PROT_SLOW; |
860 | |
875 | |
861 | if (si.prot && !si.host) |
876 | if (si.prot && !si.host && vpn->can_direct (THISNODE, conf)) |
862 | { |
877 | { |
863 | slog (L_TRACE, _("%s: connection request (indirect)"), conf->nodename); |
|
|
864 | /*TODO*/ /* start the timer so we don't recurse endlessly */ |
878 | /*TODO*/ /* start the timer so we don't recurse endlessly */ |
865 | w.start (1); |
879 | w.start (1); |
866 | vpn->send_connect_request (conf->id); |
880 | vpn->send_connect_request (this); |
867 | } |
881 | } |
868 | else |
882 | else |
869 | { |
883 | { |
870 | slog (L_TRACE, _("%s: connection request (direct)"), conf->nodename, !!ictx, !!octx); |
884 | if (si.valid ()) |
|
|
885 | slog (L_DEBUG, _("%s: sending direct connection request to %s."), |
|
|
886 | conf->nodename, (const char *)si); |
871 | |
887 | |
872 | const sockinfo &dsi = forward_si (si); |
888 | const sockinfo &dsi = forward_si (si); |
873 | |
889 | |
874 | slow = slow || (dsi.prot & PROT_SLOW); |
890 | slow = slow || (dsi.prot & PROT_SLOW); |
875 | |
891 | |
… | |
… | |
909 | } |
925 | } |
910 | } |
926 | } |
911 | |
927 | |
912 | delete ictx; ictx = 0; |
928 | delete ictx; ictx = 0; |
913 | delete octx; octx = 0; |
929 | delete octx; octx = 0; |
914 | #if ENABLE_DNS |
|
|
915 | dnsv4_reset_connection (); |
|
|
916 | #endif |
|
|
917 | |
930 | |
918 | si.host = 0; |
931 | si.host = 0; |
919 | |
932 | |
|
|
933 | have_snd_auth = false; |
|
|
934 | have_rcv_auth = false; |
|
|
935 | auth_expire = 0.; |
|
|
936 | |
920 | last_activity = 0; |
937 | last_activity = 0.; |
|
|
938 | //last_si_change = 0.; |
921 | retry_cnt = 0; |
939 | retry_cnt = 0; |
922 | |
940 | |
923 | rekey.stop (); |
941 | rekey.stop (); |
924 | keepalive.stop (); |
942 | keepalive.stop (); |
925 | establish_connection.stop (); |
943 | establish_connection.stop (); |
… | |
… | |
932 | send_reset (si); |
950 | send_reset (si); |
933 | |
951 | |
934 | reset_connection (); |
952 | reset_connection (); |
935 | } |
953 | } |
936 | |
954 | |
|
|
955 | // poor-man's rekeying |
937 | inline void |
956 | inline void |
938 | connection::rekey_cb (ev::timer &w, int revents) |
957 | connection::rekey_cb (ev::timer &w, int revents) |
939 | { |
958 | { |
940 | reset_connection (); |
959 | reset_connection (); |
941 | establish_connection (); |
960 | establish_connection (); |
… | |
… | |
980 | data_queue.put (new tap_packet (*pkt)); |
999 | data_queue.put (new tap_packet (*pkt)); |
981 | post_inject_queue (); |
1000 | post_inject_queue (); |
982 | } |
1001 | } |
983 | } |
1002 | } |
984 | |
1003 | |
|
|
1004 | void |
985 | void connection::inject_vpn_packet (vpn_packet *pkt, int tos) |
1005 | connection::inject_vpn_packet (vpn_packet *pkt, int tos) |
986 | { |
1006 | { |
987 | if (ictx && octx) |
1007 | if (ictx && octx) |
988 | send_vpn_packet (pkt, si, tos); |
1008 | send_vpn_packet (pkt, si, tos); |
989 | else |
1009 | else |
990 | { |
1010 | { |
… | |
… | |
996 | void |
1016 | void |
997 | connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
1017 | connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
998 | { |
1018 | { |
999 | last_activity = ev_now (); |
1019 | last_activity = ev_now (); |
1000 | |
1020 | |
1001 | slog (L_NOISE, "<<%d received packet type %d from %d to %d", |
1021 | slog (L_NOISE, "%s >> received packet type %d from %d to %d.", |
1002 | conf->id, pkt->typ (), pkt->src (), pkt->dst ()); |
1022 | conf->nodename, pkt->typ (), pkt->src (), pkt->dst ()); |
1003 | |
1023 | |
1004 | if (connectmode == conf_node::C_DISABLED) |
1024 | if (connectmode == conf_node::C_DISABLED) |
1005 | return; |
1025 | return; |
1006 | |
1026 | |
1007 | switch (pkt->typ ()) |
1027 | switch (pkt->typ ()) |
1008 | { |
1028 | { |
1009 | case vpn_packet::PT_PING: |
1029 | case vpn_packet::PT_PING: |
|
|
1030 | slog (L_TRACE, "%s >> PT_PING", conf->nodename); |
|
|
1031 | |
1010 | // we send pings instead of auth packets after some retries, |
1032 | // we send pings instead of auth packets after some retries, |
1011 | // so reset the retry counter and establish a connection |
1033 | // so reset the retry counter and establish a connection |
1012 | // when we receive a ping. |
1034 | // when we receive a ping. |
1013 | if (!ictx) |
1035 | if (!ictx) |
1014 | { |
1036 | { |
1015 | if (auth_rate_limiter.can (rsi)) |
1037 | if (auth_rate_limiter.can (rsi)) |
1016 | send_auth_request (rsi, true); |
1038 | send_auth_request (rsi, true); |
1017 | } |
1039 | } |
1018 | else |
1040 | else |
|
|
1041 | // we would love to change the socket address here, but ping's aren't |
|
|
1042 | // authenticated, so we best ignore it. |
1019 | send_ping (rsi, 1); // pong |
1043 | send_ping (rsi, 1); // pong |
1020 | |
1044 | |
1021 | break; |
1045 | break; |
1022 | |
1046 | |
1023 | case vpn_packet::PT_PONG: |
1047 | case vpn_packet::PT_PONG: |
|
|
1048 | slog (L_TRACE, "%s >> PT_PONG", conf->nodename); |
|
|
1049 | |
|
|
1050 | // a PONG might mean that the other side doesn't really know |
|
|
1051 | // about our desire for communication. |
|
|
1052 | establish_connection (); |
1024 | break; |
1053 | break; |
1025 | |
1054 | |
1026 | case vpn_packet::PT_RESET: |
1055 | case vpn_packet::PT_RESET: |
1027 | { |
1056 | { |
1028 | reset_connection (); |
1057 | reset_connection (); |
1029 | |
1058 | |
1030 | config_packet *p = (config_packet *) pkt; |
1059 | config_packet *p = (config_packet *) pkt; |
1031 | |
1060 | |
1032 | if (!p->chk_config ()) |
1061 | if (!p->chk_config ()) |
1033 | { |
1062 | { |
1034 | slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"), |
1063 | slog (L_WARN, _("%s(%s): protocol mismatch, disabling node."), |
1035 | conf->nodename, (const char *)rsi); |
1064 | conf->nodename, (const char *)rsi); |
1036 | connectmode = conf_node::C_DISABLED; |
1065 | connectmode = conf_node::C_DISABLED; |
1037 | } |
1066 | } |
1038 | else if (connectmode == conf_node::C_ALWAYS) |
1067 | else if (connectmode == conf_node::C_ALWAYS) |
1039 | establish_connection (); |
1068 | establish_connection (); |
… | |
… | |
1041 | break; |
1070 | break; |
1042 | |
1071 | |
1043 | case vpn_packet::PT_AUTH_REQ: |
1072 | case vpn_packet::PT_AUTH_REQ: |
1044 | if (auth_rate_limiter.can (rsi)) |
1073 | if (auth_rate_limiter.can (rsi)) |
1045 | { |
1074 | { |
1046 | auth_req_packet *p = (auth_req_packet *) pkt; |
1075 | auth_req_packet *p = (auth_req_packet *)pkt; |
1047 | |
1076 | |
1048 | slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate); |
1077 | slog (L_TRACE, "%s >> PT_AUTH_REQ(%s,p%02x,f%02x)", |
|
|
1078 | conf->nodename, p->initiate ? "initiate" : "reply", |
|
|
1079 | p->protocols, p->features); |
1049 | |
1080 | |
1050 | if (p->chk_config () && !strncmp (p->magic, MAGIC, 8)) |
1081 | if (p->chk_config () && !memcmp (p->magic, MAGIC, 8)) |
1051 | { |
1082 | { |
1052 | if (p->prot_minor != PROTOCOL_MINOR) |
1083 | if (p->prot_minor != PROTOCOL_MINOR) |
1053 | slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."), |
1084 | slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."), |
1054 | conf->nodename, (const char *)rsi, |
1085 | conf->nodename, (const char *)rsi, |
1055 | PROTOCOL_MINOR, conf->nodename, p->prot_minor); |
1086 | PROTOCOL_MINOR, conf->nodename, p->prot_minor); |
1056 | |
1087 | |
1057 | if (p->initiate) |
1088 | if (p->initiate) |
1058 | send_auth_request (rsi, false); |
1089 | send_auth_request (rsi, false); |
1059 | |
1090 | |
1060 | rsachallenge k; |
1091 | auth_data auth; |
1061 | |
1092 | |
1062 | if (!rsa_decrypt (::conf.rsa_key, p->encr, k)) |
1093 | if (!auth_decrypt (::conf.rsa_key, p->encr, auth)) |
1063 | { |
1094 | { |
1064 | slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"), |
1095 | slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"), |
1065 | conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0)); |
1096 | conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0)); |
1066 | break; |
|
|
1067 | } |
1097 | } |
1068 | else |
1098 | else |
1069 | { |
1099 | { |
1070 | delete octx; |
1100 | bool chg = !have_rcv_auth || memcmp (&rcv_auth, &auth, sizeof auth); |
1071 | |
1101 | |
1072 | octx = new crypto_ctx (k, 1); |
1102 | rcv_auth = auth; |
1073 | oseqno = ntohl (*(u32 *)&k[CHG_SEQNO]) & 0x7fffffff; |
1103 | have_rcv_auth = true; |
1074 | |
1104 | |
|
|
1105 | send_auth_response (rsi); |
|
|
1106 | |
|
|
1107 | if (chg) |
|
|
1108 | { |
1075 | conf->protocols = p->protocols; |
1109 | conf->protocols = p->protocols; |
1076 | features = p->features & config_packet::get_features (); |
1110 | features = p->features & config_packet::get_features (); |
1077 | |
1111 | |
1078 | send_auth_response (rsi, p->id, k); |
|
|
1079 | |
|
|
1080 | connection_established (); |
1112 | connection_established (rsi); |
1081 | |
|
|
1082 | break; |
1113 | } |
1083 | } |
1114 | } |
|
|
1115 | |
|
|
1116 | break; |
1084 | } |
1117 | } |
1085 | else |
1118 | else |
1086 | slog (L_WARN, _("%s(%s): protocol mismatch"), |
1119 | slog (L_WARN, _("%s(%s): protocol mismatch."), |
1087 | conf->nodename, (const char *)rsi); |
1120 | conf->nodename, (const char *)rsi); |
1088 | |
1121 | |
1089 | send_reset (rsi); |
1122 | send_reset (rsi); |
1090 | } |
1123 | } |
1091 | |
1124 | |
1092 | break; |
1125 | break; |
1093 | |
1126 | |
1094 | case vpn_packet::PT_AUTH_RES: |
1127 | case vpn_packet::PT_AUTH_RES: |
1095 | { |
1128 | { |
1096 | auth_res_packet *p = (auth_res_packet *) pkt; |
1129 | auth_res_packet *p = (auth_res_packet *)pkt; |
1097 | |
1130 | |
1098 | slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id); |
1131 | slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename); |
1099 | |
1132 | |
1100 | if (p->chk_config ()) |
1133 | if (p->chk_config ()) |
1101 | { |
1134 | { |
1102 | if (p->prot_minor != PROTOCOL_MINOR) |
1135 | if (memcmp (&p->response.mac, snd_auth_mac, sizeof (snd_auth_mac))) |
1103 | slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."), |
|
|
1104 | conf->nodename, (const char *)rsi, |
|
|
1105 | PROTOCOL_MINOR, conf->nodename, p->prot_minor); |
|
|
1106 | |
|
|
1107 | rsachallenge chg; |
|
|
1108 | |
|
|
1109 | if (!rsa_cache.find (p->id, chg)) |
|
|
1110 | { |
1136 | { |
1111 | slog (L_ERR, _("%s(%s): unrequested auth response ignored"), |
1137 | slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."), |
1112 | conf->nodename, (const char *)rsi); |
1138 | conf->nodename, (const char *)rsi); |
1113 | break; |
|
|
1114 | } |
1139 | } |
1115 | else |
1140 | else if (!have_snd_auth) |
1116 | { |
1141 | { |
1117 | crypto_ctx *cctx = new crypto_ctx (chg, 0); |
1142 | if (p->prot_minor != PROTOCOL_MINOR) |
1118 | |
1143 | slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."), |
1119 | if (!p->hmac_chk (cctx)) |
|
|
1120 | { |
|
|
1121 | slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n" |
|
|
1122 | "could be an attack, or just corruption or a synchronization error"), |
|
|
1123 | conf->nodename, (const char *)rsi); |
1144 | conf->nodename, (const char *)rsi, |
1124 | break; |
1145 | PROTOCOL_MINOR, conf->nodename, p->prot_minor); |
1125 | } |
|
|
1126 | else |
|
|
1127 | { |
|
|
1128 | rsaresponse h; |
|
|
1129 | |
1146 | |
1130 | rsa_hash (p->id, chg, h); |
|
|
1131 | |
|
|
1132 | if (!memcmp ((u8 *)&h, (u8 *)p->response, sizeof h)) |
|
|
1133 | { |
|
|
1134 | prot_minor = p->prot_minor; |
1147 | prot_minor = p->prot_minor; |
|
|
1148 | memcpy (snd_ecdh_b, p->response.ecdh, sizeof (snd_ecdh_b)); |
1135 | |
1149 | |
1136 | delete ictx; ictx = cctx; |
1150 | have_snd_auth = true; |
1137 | |
|
|
1138 | iseqno.reset (ntohl (*(u32 *)&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid |
|
|
1139 | |
|
|
1140 | si = rsi; |
|
|
1141 | protocol = rsi.prot; |
|
|
1142 | |
|
|
1143 | connection_established (); |
1151 | connection_established (rsi); |
1144 | |
|
|
1145 | slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"), |
|
|
1146 | conf->nodename, (const char *)rsi, |
|
|
1147 | p->prot_major, p->prot_minor); |
|
|
1148 | |
|
|
1149 | if (::conf.script_node_up) |
|
|
1150 | { |
|
|
1151 | run_script_cb *cb = new run_script_cb; |
|
|
1152 | cb->set<connection, &connection::script_node_up> (this); |
|
|
1153 | run_script_queued (cb, _("node-up command execution failed, continuing.")); |
|
|
1154 | } |
|
|
1155 | |
|
|
1156 | break; |
|
|
1157 | } |
|
|
1158 | else |
|
|
1159 | slog (L_ERR, _("%s(%s): sent and received challenge do not match"), |
|
|
1160 | conf->nodename, (const char *)rsi); |
|
|
1161 | } |
|
|
1162 | |
|
|
1163 | delete cctx; |
|
|
1164 | } |
1152 | } |
|
|
1153 | |
|
|
1154 | break; |
1165 | } |
1155 | } |
1166 | } |
1156 | } |
1167 | |
1157 | |
1168 | send_reset (rsi); |
1158 | send_reset (rsi); |
1169 | break; |
1159 | break; |
… | |
… | |
1180 | { |
1170 | { |
1181 | vpndata_packet *p = (vpndata_packet *)pkt; |
1171 | vpndata_packet *p = (vpndata_packet *)pkt; |
1182 | |
1172 | |
1183 | if (!p->hmac_chk (ictx)) |
1173 | if (!p->hmac_chk (ictx)) |
1184 | slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n" |
1174 | slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n" |
1185 | "could be an attack, or just corruption or a synchronization error"), |
1175 | "could be an attack, or just corruption or a synchronization error."), |
1186 | conf->nodename, (const char *)rsi); |
1176 | conf->nodename, (const char *)rsi); |
1187 | else |
1177 | else |
1188 | { |
1178 | { |
1189 | u32 seqno; |
1179 | u32 seqno; |
1190 | tap_packet *d = p->unpack (this, seqno); |
1180 | tap_packet *d = p->unpack (this, seqno); |
|
|
1181 | int seqclass = iseqno.seqno_classify (seqno); |
1191 | |
1182 | |
1192 | if (iseqno.recv_ok (seqno)) |
1183 | if (seqclass == 0) // ok |
1193 | { |
1184 | { |
1194 | vpn->tap->send (d); |
1185 | vpn->tap->send (d); |
1195 | |
1186 | |
1196 | if (si != rsi) |
1187 | if (si != rsi) |
1197 | { |
1188 | { |
1198 | // fast re-sync on source address changes, useful especially for tcp/ip |
1189 | // fast re-sync on source address changes, useful especially for tcp/ip |
|
|
1190 | //if (last_si_change < ev_now () + 5.) |
1199 | si = rsi; |
1191 | // { |
1200 | |
|
|
1201 | slog (L_INFO, _("%s(%s): socket address changed to %s"), |
1192 | slog (L_INFO, _("%s(%s): changing socket address to %s."), |
1202 | conf->nodename, (const char *)si, (const char *)rsi); |
1193 | conf->nodename, (const char *)si, (const char *)rsi); |
|
|
1194 | |
|
|
1195 | si = rsi; |
|
|
1196 | |
|
|
1197 | if (::conf.script_node_change) |
|
|
1198 | { |
|
|
1199 | run_script_cb *cb = new run_script_cb; |
|
|
1200 | cb->set<connection, &connection::script_node_change> (this); |
|
|
1201 | run_script_queued (cb, _("node-change command execution failed, continuing.")); |
|
|
1202 | } |
|
|
1203 | |
|
|
1204 | // } |
|
|
1205 | //else |
|
|
1206 | // slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."), |
|
|
1207 | // conf->nodename, (const char *)si, (const char *)rsi); |
1203 | } |
1208 | } |
|
|
1209 | } |
|
|
1210 | else if (seqclass == 1) // far history |
|
|
1211 | slog (L_ERR, _("received very old packet (received %08lx, expected %08lx). " |
|
|
1212 | "possible replay attack, or just packet duplication/delay, ignoring."), seqno, iseqno.seq + 1); |
|
|
1213 | else if (seqclass == 2) // in-window duplicate, happens often on wireless |
|
|
1214 | slog (L_DEBUG, _("received recent duplicated packet (received %08lx, expected %08lx). " |
|
|
1215 | "possible replay attack, or just packet duplication, ignoring."), seqno, iseqno.seq + 1); |
|
|
1216 | else if (seqclass == 3) // reset |
|
|
1217 | { |
|
|
1218 | slog (L_ERR, _("received out-of-sync (far future) packet (received %08lx, expected %08lx). " |
|
|
1219 | "probably just massive packet loss, sending reset."), seqno, iseqno.seq + 1); |
|
|
1220 | send_reset (rsi); |
1204 | } |
1221 | } |
1205 | |
1222 | |
1206 | delete d; |
1223 | delete d; |
1207 | break; |
1224 | break; |
1208 | } |
1225 | } |
… | |
… | |
1212 | break; |
1229 | break; |
1213 | |
1230 | |
1214 | case vpn_packet::PT_CONNECT_REQ: |
1231 | case vpn_packet::PT_CONNECT_REQ: |
1215 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
1232 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
1216 | { |
1233 | { |
1217 | connect_req_packet *p = (connect_req_packet *) pkt; |
1234 | connect_req_packet *p = (connect_req_packet *)pkt; |
1218 | |
1235 | |
1219 | if (p->id > 0 && p->id <= vpn->conns.size ()) |
1236 | if (p->id > 0 && p->id <= vpn->conns.size ()) |
1220 | { |
1237 | { |
1221 | connection *c = vpn->conns[p->id - 1]; |
1238 | connection *c = vpn->conns[p->id - 1]; |
1222 | conf->protocols = p->protocols; |
1239 | conf->protocols = p->protocols; |
1223 | |
1240 | |
1224 | slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]", |
1241 | slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s,p%02x) [%d]", |
|
|
1242 | conf->nodename, vpn->conns[p->id - 1]->conf->nodename, |
|
|
1243 | p->protocols, |
1225 | conf->id, p->id, c->ictx && c->octx); |
1244 | c->ictx && c->octx); |
1226 | |
1245 | |
1227 | if (c->ictx && c->octx) |
1246 | if (c->ictx && c->octx) |
1228 | { |
1247 | { |
1229 | // send connect_info packets to both sides, in case one is |
1248 | // send connect_info packets to both sides, in case one is |
1230 | // behind a nat firewall (or both ;) |
1249 | // behind a nat firewall (or both ;) |
… | |
… | |
1253 | |
1272 | |
1254 | c->conf->protocols = p->protocols; |
1273 | c->conf->protocols = p->protocols; |
1255 | protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf)); |
1274 | protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf)); |
1256 | p->si.upgrade_protocol (protocol, c->conf); |
1275 | p->si.upgrade_protocol (protocol, c->conf); |
1257 | |
1276 | |
1258 | slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)", |
1277 | slog (L_TRACE, "%s >> PT_CONNECT_INFO(%s,%s,protocols=%02x,protocol=%02x,upgradable=%02x) [%d]", |
1259 | conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx); |
1278 | conf->nodename, |
|
|
1279 | vpn->conns[p->id - 1]->conf->nodename, |
|
|
1280 | (const char *)p->si, |
|
|
1281 | p->protocols, |
|
|
1282 | protocol, |
|
|
1283 | p->si.supported_protocols (c->conf), |
|
|
1284 | !c->ictx && !c->octx); |
1260 | |
1285 | |
1261 | const sockinfo &dsi = forward_si (p->si); |
1286 | const sockinfo &dsi = forward_si (p->si); |
1262 | |
1287 | |
1263 | if (dsi.valid ()) |
1288 | if (dsi.valid ()) |
1264 | c->send_auth_request (dsi, true); |
1289 | c->send_auth_request (dsi, true); |
|
|
1290 | else |
|
|
1291 | slog (L_INFO, "connect info for %s received (%s), but still unable to contact.", |
|
|
1292 | vpn->conns[p->id - 1]->conf->nodename, |
|
|
1293 | (const char *)p->si); |
1265 | } |
1294 | } |
1266 | else |
1295 | else |
1267 | slog (L_WARN, |
1296 | slog (L_WARN, |
1268 | _("received authenticated connection request from unknown node #%d, config file mismatch?"), |
1297 | _("received authenticated connection request from unknown node #%d, config file mismatch?"), |
1269 | p->id); |
1298 | p->id); |
… | |
… | |
1278 | } |
1307 | } |
1279 | |
1308 | |
1280 | inline void |
1309 | inline void |
1281 | connection::keepalive_cb (ev::timer &w, int revents) |
1310 | connection::keepalive_cb (ev::timer &w, int revents) |
1282 | { |
1311 | { |
1283 | if (ev_now () >= last_activity + ::conf.keepalive + 30) |
1312 | ev_tstamp when = last_activity + ::conf.keepalive - ev::now (); |
|
|
1313 | |
|
|
1314 | if (when >= 0) |
|
|
1315 | w.start (when); |
|
|
1316 | else if (when < -15) |
1284 | { |
1317 | { |
1285 | reset_connection (); |
1318 | reset_connection (); |
1286 | establish_connection (); |
1319 | establish_connection (); |
1287 | } |
1320 | } |
1288 | else if (ev_now () < last_activity + ::conf.keepalive) |
|
|
1289 | w.start (last_activity + ::conf.keepalive - ev::now ()); |
|
|
1290 | else if (conf->connectmode != conf_node::C_ONDEMAND |
1321 | else if (conf->connectmode != conf_node::C_ONDEMAND |
1291 | || THISNODE->connectmode != conf_node::C_ONDEMAND) |
1322 | || THISNODE->connectmode != conf_node::C_ONDEMAND) |
1292 | { |
1323 | { |
|
|
1324 | w.start (3); |
1293 | send_ping (si); |
1325 | send_ping (si); |
1294 | w.start (5); |
|
|
1295 | } |
1326 | } |
1296 | else if (ev_now () < last_activity + ::conf.keepalive + 10) |
1327 | else if (when >= -10) |
1297 | // hold ondemand connections implicitly a few seconds longer |
1328 | // hold ondemand connections implicitly a few seconds longer |
1298 | // should delete octx, though, or something like that ;) |
1329 | // should delete octx, though, or something like that ;) |
1299 | w.start (last_activity + ::conf.keepalive + 10 - ev::now ()); |
1330 | w.start (when + 10); |
1300 | else |
1331 | else |
1301 | reset_connection (); |
1332 | reset_connection (); |
1302 | } |
1333 | } |
1303 | |
1334 | |
|
|
1335 | void |
1304 | void connection::send_connect_request (int id) |
1336 | connection::send_connect_request (int id) |
1305 | { |
1337 | { |
1306 | connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols); |
1338 | connect_req_packet *p = new connect_req_packet (conf->id, id, THISNODE->protocols); |
1307 | |
1339 | |
1308 | slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id); |
1340 | slog (L_TRACE, "%s << PT_CONNECT_REQ(%s,p%02x)", |
|
|
1341 | conf->nodename, vpn->conns[id - 1]->conf->nodename, |
|
|
1342 | THISNODE->protocols); |
1309 | p->hmac_set (octx); |
1343 | p->hmac_set (octx); |
1310 | send_vpn_packet (p, si); |
1344 | send_vpn_packet (p, si); |
1311 | |
1345 | |
1312 | delete p; |
1346 | delete p; |
1313 | } |
1347 | } |
1314 | |
1348 | |
|
|
1349 | void |
1315 | void connection::script_init_env (const char *ext) |
1350 | connection::script_init_env (const char *ext) |
1316 | { |
1351 | { |
1317 | char *env; |
1352 | char *env; |
1318 | asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env); |
1353 | asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env); |
1319 | asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env); |
1354 | asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env); |
1320 | asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext, |
1355 | asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext, |
1321 | 0xfe, 0xfd, 0x80, 0x00, conf->id >> 8, |
1356 | 0xfe, 0xfd, 0x80, 0x00, conf->id >> 8, |
1322 | conf->id & 0xff); putenv (env); |
1357 | conf->id & 0xff); putenv (env); |
1323 | } |
1358 | } |
1324 | |
1359 | |
|
|
1360 | void |
1325 | void connection::script_init_connect_env () |
1361 | connection::script_init_connect_env () |
1326 | { |
1362 | { |
1327 | vpn->script_init_env (); |
1363 | vpn->script_init_env (); |
1328 | |
1364 | |
1329 | char *env; |
1365 | char *env; |
1330 | asprintf (&env, "DESTID=%d", conf->id); putenv (env); |
1366 | asprintf (&env, "DESTID=%d", conf->id); putenv (env); |
|
|
1367 | asprintf (&env, "DESTSI=%s", (const char *)si); putenv (env); |
1331 | asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env); |
1368 | asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env); |
1332 | asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env); |
1369 | asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env); |
1333 | asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env); |
1370 | asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env); |
1334 | } |
1371 | } |
1335 | |
1372 | |
1336 | inline const char * |
1373 | inline const char * |
1337 | connection::script_node_up () |
1374 | connection::script_node_up () |
1338 | { |
1375 | { |
… | |
… | |
1348 | |
1385 | |
1349 | return filename; |
1386 | return filename; |
1350 | } |
1387 | } |
1351 | |
1388 | |
1352 | inline const char * |
1389 | inline const char * |
|
|
1390 | connection::script_node_change () |
|
|
1391 | { |
|
|
1392 | script_init_connect_env (); |
|
|
1393 | |
|
|
1394 | putenv ((char *)"STATE=change"); |
|
|
1395 | |
|
|
1396 | char *filename; |
|
|
1397 | asprintf (&filename, |
|
|
1398 | "%s/%s", |
|
|
1399 | confbase, |
|
|
1400 | ::conf.script_node_change ? ::conf.script_node_change : "node-change"); |
|
|
1401 | |
|
|
1402 | return filename; |
|
|
1403 | } |
|
|
1404 | |
|
|
1405 | inline const char * |
1353 | connection::script_node_down () |
1406 | connection::script_node_down () |
1354 | { |
1407 | { |
1355 | script_init_connect_env (); |
1408 | script_init_connect_env (); |
1356 | |
1409 | |
1357 | putenv ((char *)"STATE=down"); |
1410 | putenv ((char *)"STATE=down"); |
… | |
… | |
1368 | connection::connection (struct vpn *vpn, conf_node *conf) |
1421 | connection::connection (struct vpn *vpn, conf_node *conf) |
1369 | : vpn(vpn), conf(conf), |
1422 | : vpn(vpn), conf(conf), |
1370 | #if ENABLE_DNS |
1423 | #if ENABLE_DNS |
1371 | dns (0), |
1424 | dns (0), |
1372 | #endif |
1425 | #endif |
1373 | data_queue(conf->max_ttl, conf->max_queue), |
1426 | data_queue(conf->max_ttl, conf->max_queue + 1), |
1374 | vpn_queue(conf->max_ttl, conf->max_queue) |
1427 | vpn_queue(conf->max_ttl, conf->max_queue + 1) |
1375 | { |
1428 | { |
1376 | rekey .set<connection, &connection::rekey_cb > (this); |
1429 | rekey .set<connection, &connection::rekey_cb > (this); |
1377 | keepalive .set<connection, &connection::keepalive_cb > (this); |
1430 | keepalive .set<connection, &connection::keepalive_cb > (this); |
1378 | establish_connection.set<connection, &connection::establish_connection_cb> (this); |
1431 | establish_connection.set<connection, &connection::establish_connection_cb> (this); |
1379 | |
1432 | |
1380 | last_establish_attempt = 0.; |
1433 | last_establish_attempt = 0.; |
1381 | octx = ictx = 0; |
1434 | octx = ictx = 0; |
1382 | |
1435 | |
1383 | if (!conf->protocols) // make sure some protocol is enabled |
|
|
1384 | conf->protocols = PROT_UDPv4; |
|
|
1385 | |
|
|
1386 | connectmode = conf->connectmode; |
1436 | connectmode = conf->connectmode; |
1387 | |
1437 | |
1388 | // queue a dummy packet to force an initial connection attempt |
1438 | // queue a dummy packet to force an initial connection attempt |
1389 | if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED) |
1439 | if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED) |
1390 | vpn_queue.put (new net_packet); |
1440 | vpn_queue.put (new net_packet); |
… | |
… | |
1395 | connection::~connection () |
1445 | connection::~connection () |
1396 | { |
1446 | { |
1397 | shutdown (); |
1447 | shutdown (); |
1398 | } |
1448 | } |
1399 | |
1449 | |
|
|
1450 | void |
1400 | void connection_init () |
1451 | connection_init () |
1401 | { |
1452 | { |
1402 | auth_rate_limiter.clear (); |
1453 | auth_rate_limiter.clear (); |
1403 | reset_rate_limiter.clear (); |
1454 | reset_rate_limiter.clear (); |
1404 | } |
1455 | } |
1405 | |
1456 | |