1 | /* |
1 | /* |
2 | util.C -- process management and other utility functions |
2 | util.C -- process management and other utility functions |
3 | |
3 | |
4 | Most of these are taken from tinc, see the AUTHORS file. |
4 | Some of these are taken from tinc, see the AUTHORS file. |
5 | |
5 | |
6 | This program is free software; you can redistribute it and/or modify |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by |
7 | it under the terms of the GNU General Public License as published by |
8 | the Free Software Foundation; either version 2 of the License, or |
8 | the Free Software Foundation; either version 2 of the License, or |
9 | (at your option) any later version. |
9 | (at your option) any later version. |
… | |
… | |
24 | #include <cstring> |
24 | #include <cstring> |
25 | |
25 | |
26 | #include <errno.h> |
26 | #include <errno.h> |
27 | #include <signal.h> |
27 | #include <signal.h> |
28 | #include <sys/types.h> |
28 | #include <sys/types.h> |
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29 | #include <sys/wait.h> |
29 | #include <unistd.h> |
30 | #include <unistd.h> |
30 | #include <time.h> |
31 | #include <time.h> |
31 | #include <sys/socket.h> |
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32 | #include <netinet/in.h> |
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33 | #include <arpa/inet.h> |
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34 | |
32 | |
35 | #include <sys/mman.h> |
33 | #include "netcompat.h" |
36 | |
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37 | #include <openssl/rand.h> |
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38 | #include <openssl/rsa.h> |
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39 | #include <openssl/pem.h> |
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40 | #include <openssl/evp.h> |
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41 | |
34 | |
42 | #include "gettext.h" |
35 | #include "gettext.h" |
43 | #include "pidfile.h" |
36 | #include "pidfile.h" |
44 | #include "dropin.h" |
37 | #include "dropin.h" |
45 | |
38 | |
46 | #include "global.h" |
39 | #include "global.h" |
47 | #include "conf.h" |
40 | #include "conf.h" |
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41 | #include "util.h" |
48 | #include "slog.h" |
42 | #include "slog.h" |
49 | #include "protocol.h" |
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50 | |
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51 | time_t now; |
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52 | |
43 | |
53 | int |
44 | int |
54 | write_pidfile (void) |
45 | write_pidfile (void) |
55 | { |
46 | { |
56 | int pid; |
47 | int pid; |
… | |
… | |
142 | |
133 | |
143 | if (!confbase) |
134 | if (!confbase) |
144 | asprintf (&confbase, "%s/vpe", CONFDIR); |
135 | asprintf (&confbase, "%s/vpe", CONFDIR); |
145 | } |
136 | } |
146 | |
137 | |
147 | void pkt_queue::put (tap_packet *p) |
138 | void run_script (const run_script_cb &cb, bool wait) |
148 | { |
139 | { |
149 | if (queue[i]) |
140 | int pid; |
150 | { |
141 | |
151 | delete queue[i]; |
142 | if ((pid = fork ()) == 0) |
152 | j = (j + 1) % QUEUEDEPTH; |
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153 | } |
143 | { |
154 | |
144 | char *filename; |
155 | queue[i] = p; |
145 | asprintf (&filename, "%s/%s", confbase, cb()); |
156 | |
146 | execl (filename, filename, (char *) 0); |
157 | i = (i + 1) % QUEUEDEPTH; |
147 | exit (255); |
158 | } |
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159 | |
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160 | tap_packet *pkt_queue::get () |
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161 | { |
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162 | tap_packet *p = queue[j]; |
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163 | |
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164 | if (p) |
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165 | { |
148 | } |
166 | queue[j] = 0; |
149 | else if (pid > 0) |
167 | j = (j + 1) % QUEUEDEPTH; |
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168 | } |
150 | { |
169 | |
151 | if (wait) |
170 | return p; |
152 | { |
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153 | waitpid (pid, 0, 0); |
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154 | /* TODO: check status */ |
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155 | } |
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156 | } |
171 | } |
157 | } |
172 | |
158 | |
173 | pkt_queue::pkt_queue () |
159 | #if ENABLE_HTTP_PROXY |
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160 | // works like strdup |
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161 | u8 * |
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162 | base64_encode (const u8 *data, unsigned int len) |
174 | { |
163 | { |
175 | memset (queue, 0, sizeof (queue)); |
164 | const static char base64[65] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
176 | i = 0; |
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177 | j = 0; |
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178 | } |
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179 | |
165 | |
180 | pkt_queue::~pkt_queue () |
166 | unsigned int t, i; |
181 | { |
167 | const u8 *end = data + len; |
182 | for (i = QUEUEDEPTH; --i > 0; ) |
168 | u8 *res = new u8 [4 * ((len + 2) / 3) + 1]; |
183 | delete queue[i]; |
169 | u8 *out = res; |
184 | } |
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185 | |
170 | |
186 | sockinfo::operator const char *() |
171 | while (data <= end - 3) |
187 | { |
172 | { |
188 | static char hostport[15 + 1 + 5 + 1]; |
173 | t = (((data[0] << 8) | data[1]) << 8) | data[2]; |
189 | in_addr ia = { host }; |
174 | data += 3; |
190 | |
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191 | sprintf (hostport, "%.15s:%d", inet_ntoa (ia), ntohs (port) & 0xffff); |
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192 | |
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193 | return hostport; |
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194 | } |
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195 | |
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196 | bool u32_rate_limiter::can (u32 host) |
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197 | { |
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198 | iterator i; |
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199 | |
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200 | for (i = begin (); i != end (); ) |
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201 | if (i->second <= now) |
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202 | { |
175 | |
203 | erase (i); |
176 | *out++ = base64[(t >> 18) & 0x3f]; |
204 | i = begin (); |
177 | *out++ = base64[(t >> 12) & 0x3f]; |
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178 | *out++ = base64[(t >> 6) & 0x3f]; |
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179 | *out++ = base64[(t ) & 0x3f]; |
205 | } |
180 | } |
206 | else |
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207 | ++i; |
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208 | |
181 | |
209 | i = find (host); |
182 | for (t = 0, i = 0; data < end; i++) |
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183 | t = (t << 8) | *data++; |
210 | |
184 | |
211 | if (i != end ()) |
185 | switch (i) |
212 | return false; |
186 | { |
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187 | case 2: |
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188 | *out++ = base64[(t >> 10) & 0x3f]; |
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189 | *out++ = base64[(t >> 4) & 0x3f]; |
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190 | *out++ = base64[(t << 2) & 0x3f]; |
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191 | *out++ = '='; |
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192 | break; |
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193 | case 1: |
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194 | *out++ = base64[(t >> 2) & 0x3f]; |
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195 | *out++ = base64[(t << 4) & 0x3f]; |
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196 | *out++ = '='; |
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197 | *out++ = '='; |
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198 | break; |
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199 | } |
213 | |
200 | |
214 | insert (value_type (host, now + every)); |
201 | *out++ = 0; |
215 | |
202 | |
216 | return true; |
203 | return res; |
217 | } |
204 | } |
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205 | #endif |
218 | |
206 | |
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207 | void |
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208 | id2mac (unsigned int id, void *m) |
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209 | { |
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210 | mac &p = *(mac *)m; |
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211 | |
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212 | if (id) |
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213 | { |
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214 | p[0] = 0xfe; |
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215 | p[1] = 0xfd; |
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216 | p[2] = 0x80; |
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217 | p[3] = 0x00; |
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218 | p[4] = id >> 8; |
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219 | p[5] = id; |
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220 | } |
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221 | else |
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222 | { |
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223 | p[0] = 0xff; |
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224 | p[1] = 0xff; |
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225 | p[2] = 0xff; |
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226 | p[3] = 0xff; |
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227 | p[4] = 0xff; |
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228 | p[5] = 0xff; |
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229 | } |
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230 | } |
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231 | |