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Commit | Line | Data |
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05207d69 MT |
1 | /* |
2 | * | |
3 | * File originally from the Smoothwall project | |
4 | * (c) 2001 Smoothwall Team | |
5 | * | |
05207d69 MT |
6 | */ |
7 | ||
8 | #include "libsmooth.h" | |
9 | #include <stdio.h> | |
10 | #include <stdlib.h> | |
11 | #include <string.h> | |
12 | #include <unistd.h> | |
13 | #include <sys/types.h> | |
14 | #include <sys/stat.h> | |
15 | #include <signal.h> | |
16 | #include "setuid.h" | |
17 | ||
5fd30232 MT |
18 | /* |
19 | This module is responsible for start stop of the vpn system. | |
20 | ||
21 | 1) it allows AH & ESP to get in from interface where a vpn is mounted | |
69dcc425 | 22 | The NAT traversal is used on the udp 4500 port. |
5fd30232 MT |
23 | |
24 | 2) it starts the ipsec daemon | |
69dcc425 CS |
25 | The RED interface is a problem because it can be up or down a startup. |
26 | Then, the state change and it must not affect other VPN mounted on | |
27 | other interface. | |
28 | Unfortunatly, openswan 1 cannot do that correctly. It cannot use an | |
29 | interface without restarting everything. | |
5fd30232 MT |
30 | |
31 | */ | |
32 | ||
05207d69 | 33 | void usage() { |
69dcc425 CS |
34 | fprintf (stderr, "Usage:\n"); |
35 | fprintf (stderr, "\tipsecctrl S [connectionkey]\n"); | |
36 | fprintf (stderr, "\tipsecctrl D [connectionkey]\n"); | |
37 | fprintf (stderr, "\tipsecctrl R\n"); | |
db073a10 | 38 | fprintf (stderr, "\tipsecctrl I\n"); |
69dcc425 CS |
39 | fprintf (stderr, "\t\tS : Start/Restart Connection\n"); |
40 | fprintf (stderr, "\t\tD : Stop Connection\n"); | |
41 | fprintf (stderr, "\t\tR : Reload Certificates and Secrets\n"); | |
db073a10 | 42 | fprintf (stderr, "\t\tI : Print Statusinfo\n"); |
05207d69 MT |
43 | } |
44 | ||
5fd30232 | 45 | /* |
69dcc425 | 46 | ACCEPT the ipsec protocol ah, esp & udp (for nat traversal) on the specified interface |
5fd30232 MT |
47 | */ |
48 | void open_physical (char *interface, int nat_traversal_port) { | |
69dcc425 CS |
49 | char str[STRING_SIZE]; |
50 | ||
51 | // GRE ??? | |
db073a10 | 52 | // sprintf(str, "/sbin/iptables -A " phystable " -p 47 -i %s -j ACCEPT", interface); |
6652626c | 53 | // safe_system(str); |
69dcc425 | 54 | // ESP |
db073a10 | 55 | // sprintf(str, "/sbin/iptables -A " phystable " -p 50 -i %s -j ACCEPT", interface); |
6652626c | 56 | // safe_system(str); |
69dcc425 | 57 | // AH |
db073a10 | 58 | // sprintf(str, "/sbin/iptables -A " phystable " -p 51 -i %s -j ACCEPT", interface); |
6652626c | 59 | // safe_system(str); |
69dcc425 | 60 | // IKE |
db073a10 AF |
61 | sprintf(str, "/sbin/iptables -A IPSECINPUT -p udp -i %s --sport 500 --dport 500 -j ACCEPT", interface); |
62 | safe_system(str); | |
69dcc425 CS |
63 | |
64 | if (! nat_traversal_port) | |
65 | return; | |
66 | ||
db073a10 AF |
67 | sprintf(str, "/sbin/iptables -A IPSECINPUT -p udp -i %s --dport %i -j ACCEPT", interface, nat_traversal_port); |
68 | safe_system(str); | |
5fd30232 MT |
69 | } |
70 | ||
71 | void ipsec_norules() { | |
69dcc425 | 72 | /* clear input rules */ |
db073a10 AF |
73 | safe_system("/sbin/iptables -F IPSECINPUT"); |
74 | safe_system("/sbin/iptables -F IPSECFORWARD"); | |
75 | safe_system("/sbin/iptables -F IPSECOUTPUT"); | |
69dcc425 | 76 | |
05207d69 MT |
77 | } |
78 | ||
5fd30232 MT |
79 | /* |
80 | return values from the vpn config file or false if not 'on' | |
81 | */ | |
82 | int decode_line (char *s, | |
69dcc425 CS |
83 | char **key, |
84 | char **name, | |
85 | char **type, | |
86 | char **interface | |
87 | ) { | |
88 | int count = 0; | |
89 | *key = NULL; | |
90 | *name = NULL; | |
91 | *type = NULL; | |
92 | ||
93 | if (s[strlen(s) - 1] == '\n') | |
94 | s[strlen(s) - 1] = '\0'; | |
95 | ||
96 | char *result = strsep(&s, ","); | |
97 | while (result) { | |
98 | if (count == 0) | |
99 | *key = result; | |
100 | if ((count == 1) && strcmp(result, "on") != 0) | |
101 | return 0; // a disabled line | |
102 | if (count == 2) | |
103 | *name = result; | |
104 | if (count == 4) | |
105 | *type = result; | |
106 | if (count == 27) | |
107 | *interface = result; | |
108 | count++; | |
109 | result = strsep(&s, ","); | |
110 | } | |
111 | ||
112 | // check other syntax | |
113 | if (! *name) | |
114 | return 0; | |
115 | ||
116 | if (strspn(*name, LETTERS_NUMBERS) != strlen(*name)) { | |
117 | fprintf(stderr, "Bad connection name: %s\n", *name); | |
118 | return 0; | |
119 | } | |
120 | ||
121 | if (! (strcmp(*type, "host") == 0 || strcmp(*type, "net") == 0)) { | |
122 | fprintf(stderr, "Bad connection type: %s\n", *type); | |
123 | return 0; | |
124 | } | |
125 | ||
126 | if (! (strcmp(*interface, "RED") == 0 || strcmp(*interface, "GREEN") == 0 || | |
127 | strcmp(*interface, "ORANGE") == 0 || strcmp(*interface, "BLUE") == 0)) { | |
128 | fprintf(stderr, "Bad interface name: %s\n", *interface); | |
129 | return 0; | |
130 | } | |
131 | //it's a valid & active line | |
132 | return 1; | |
5fd30232 MT |
133 | } |
134 | ||
135 | /* | |
136 | issue ipsec commmands to turn on connection 'name' | |
137 | */ | |
138 | void turn_connection_on (char *name, char *type) { | |
69dcc425 CS |
139 | char command[STRING_SIZE]; |
140 | ||
db073a10 | 141 | safe_system("/usr/sbin/ipsec whack --rereadsecrets >/dev/null"); |
69dcc425 CS |
142 | memset(command, 0, STRING_SIZE); |
143 | snprintf(command, STRING_SIZE - 1, | |
144 | "/usr/sbin/ipsec auto --replace %s >/dev/null", name); | |
145 | safe_system(command); | |
146 | if (strcmp(type, "net") == 0) { | |
147 | memset(command, 0, STRING_SIZE); | |
148 | snprintf(command, STRING_SIZE - 1, | |
db073a10 | 149 | "/usr/sbin/ipsec whack --asynchronous --name %s --initiate >/dev/null", name); |
69dcc425 CS |
150 | safe_system(command); |
151 | } | |
5fd30232 MT |
152 | } |
153 | /* | |
154 | issue ipsec commmands to turn off connection 'name' | |
155 | */ | |
156 | void turn_connection_off (char *name) { | |
69dcc425 CS |
157 | char command[STRING_SIZE]; |
158 | ||
159 | memset(command, 0, STRING_SIZE); | |
160 | snprintf(command, STRING_SIZE - 1, | |
db073a10 | 161 | "/usr/sbin/ipsec whack --name %s --terminate >/dev/null", name); |
69dcc425 CS |
162 | safe_system(command); |
163 | memset(command, 0, STRING_SIZE); | |
164 | snprintf(command, STRING_SIZE - 1, | |
db073a10 | 165 | "/usr/sbin/ipsec whack --delete --name %s >/dev/null", name); |
69dcc425 | 166 | safe_system(command); |
db073a10 | 167 | safe_system("/usr/sbin/ipsec whack --rereadsecrets >/dev/null"); |
5fd30232 MT |
168 | } |
169 | ||
170 | ||
05207d69 | 171 | int main(int argc, char *argv[]) { |
5fd30232 | 172 | |
69dcc425 CS |
173 | char configtype[STRING_SIZE]; |
174 | char redtype[STRING_SIZE] = ""; | |
175 | struct keyvalue *kv = NULL; | |
176 | ||
177 | if (argc < 2) { | |
178 | usage(); | |
179 | exit(1); | |
180 | } | |
181 | if (!(initsetuid())) | |
182 | exit(1); | |
183 | ||
fe6cda92 | 184 | FILE *file = NULL; |
69dcc425 | 185 | |
dced81b2 | 186 | /* Get vpnwatch pid */ |
fe6cda92 | 187 | |
0f57633b | 188 | if ( (argc == 2) && (file = fopen("/var/run/vpn-watch.pid", "r"))) { |
7dbf47dc | 189 | safe_system("kill -9 $(cat /var/run/vpn-watch.pid)"); |
05882fff | 190 | safe_system("unlink /var/run/vpn-watch.pid"); |
7dbf47dc | 191 | close(file); |
0f57633b | 192 | } |
fe6cda92 | 193 | |
69dcc425 CS |
194 | /* FIXME: workaround for pclose() issue - still no real idea why |
195 | * this is happening */ | |
196 | signal(SIGCHLD, SIG_DFL); | |
197 | ||
198 | /* handle operations that doesn't need start the ipsec system */ | |
199 | if (argc == 2) { | |
200 | if (strcmp(argv[1], "D") == 0) { | |
201 | ipsec_norules(); | |
202 | /* Only shutdown pluto if it really is running */ | |
203 | /* Get pluto pid */ | |
204 | if (file = fopen("/var/run/pluto.pid", "r")) { | |
205 | safe_system("/etc/rc.d/init.d/ipsec stop 2> /dev/null >/dev/null"); | |
206 | close(file); | |
207 | } | |
208 | exit(0); | |
209 | } | |
210 | ||
211 | if (strcmp(argv[1], "R") == 0) { | |
db073a10 AF |
212 | safe_system("/usr/sbin/ipsec whack --rereadall"); |
213 | exit(0); | |
214 | } | |
215 | ||
216 | if (strcmp(argv[1], "I") == 0) { | |
217 | safe_system("/usr/sbin/ipsec whack --status"); | |
69dcc425 CS |
218 | exit(0); |
219 | } | |
db073a10 | 220 | |
69dcc425 CS |
221 | } |
222 | ||
223 | /* clear iptables vpn rules */ | |
224 | ipsec_norules(); | |
225 | ||
226 | /* read vpn config */ | |
227 | kv=initkeyvalues(); | |
228 | if (!readkeyvalues(kv, CONFIG_ROOT "/vpn/settings")) | |
229 | { | |
230 | fprintf(stderr, "Cannot read vpn settings\n"); | |
231 | exit(1); | |
232 | } | |
233 | ||
234 | /* check is the vpn system is enabled */ | |
235 | { | |
236 | char s[STRING_SIZE]; | |
237 | findkey(kv, "ENABLED", s); | |
238 | freekeyvalues(kv); | |
239 | if (strcmp (s, "on") != 0) | |
240 | exit(0); | |
241 | } | |
242 | ||
243 | /* read interface settings */ | |
244 | kv=initkeyvalues(); | |
245 | if (!readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings")) | |
246 | { | |
247 | fprintf(stderr, "Cannot read ethernet settings\n"); | |
248 | exit(1); | |
249 | } | |
250 | if (!findkey(kv, "CONFIG_TYPE", configtype)) | |
251 | { | |
252 | fprintf(stderr, "Cannot read CONFIG_TYPE\n"); | |
253 | exit(1); | |
254 | } | |
255 | findkey(kv, "RED_TYPE", redtype); | |
256 | ||
257 | ||
258 | /* Loop through the config file to find physical interface that will accept IPSEC */ | |
259 | int enable_red=0; // states 0: not used | |
260 | int enable_green=0; // 1: error condition | |
261 | int enable_orange=0; // 2: good | |
262 | int enable_blue=0; | |
263 | char if_red[STRING_SIZE] = ""; | |
264 | char if_green[STRING_SIZE] = ""; | |
265 | char if_orange[STRING_SIZE] = ""; | |
266 | char if_blue[STRING_SIZE] = ""; | |
267 | char s[STRING_SIZE]; | |
268 | ||
269 | if (!(file = fopen(CONFIG_ROOT "/vpn/config", "r"))) { | |
270 | fprintf(stderr, "Couldn't open vpn settings file"); | |
271 | exit(1); | |
272 | } | |
273 | while (fgets(s, STRING_SIZE, file) != NULL) { | |
274 | char *key; | |
275 | char *name; | |
276 | char *type; | |
277 | char *interface; | |
278 | if (!decode_line(s,&key,&name,&type,&interface)) | |
279 | continue; | |
280 | /* search interface */ | |
281 | if (!enable_red && strcmp (interface, "RED") == 0) { | |
282 | // when RED is up, find interface name in special file | |
283 | FILE *ifacefile = NULL; | |
284 | if ((ifacefile = fopen(CONFIG_ROOT "/red/iface", "r"))) { | |
285 | if (fgets(if_red, STRING_SIZE, ifacefile)) { | |
286 | if (if_red[strlen(if_red) - 1] == '\n') | |
287 | if_red[strlen(if_red) - 1] = '\0'; | |
288 | } | |
289 | fclose (ifacefile); | |
290 | ||
291 | if (VALID_DEVICE(if_red)) | |
292 | enable_red+=2; // present and running | |
293 | } | |
294 | } | |
295 | ||
296 | if (!enable_green && strcmp (interface, "GREEN") == 0) { | |
297 | enable_green = 1; | |
298 | findkey(kv, "GREEN_DEV", if_green); | |
299 | if (VALID_DEVICE(if_green)) | |
300 | enable_green++; | |
301 | else | |
302 | fprintf(stderr, "IPSec enabled on green but green interface is invalid or not found\n"); | |
303 | } | |
304 | ||
305 | if (!enable_orange && strcmp (interface, "ORANGE") == 0) { | |
306 | enable_orange = 1; | |
307 | findkey(kv, "ORANGE_DEV", if_orange); | |
308 | if (VALID_DEVICE(if_orange)) | |
309 | enable_orange++; | |
310 | else | |
311 | fprintf(stderr, "IPSec enabled on orange but orange interface is invalid or not found\n"); | |
312 | } | |
313 | ||
314 | if (!enable_blue && strcmp (interface, "BLUE") == 0) { | |
315 | enable_blue++; | |
316 | findkey(kv, "BLUE_DEV", if_blue); | |
317 | if (VALID_DEVICE(if_blue)) | |
318 | enable_blue++; | |
319 | else | |
320 | fprintf(stderr, "IPSec enabled on blue but blue interface is invalid or not found\n"); | |
321 | ||
322 | } | |
323 | } | |
324 | fclose(file); | |
325 | freekeyvalues(kv); | |
326 | ||
327 | // do nothing if something is in error condition | |
328 | if ((enable_red==1) || (enable_green==1) || (enable_orange==1) || (enable_blue==1) ) | |
329 | exit(1); | |
330 | ||
331 | // exit if nothing to do | |
332 | if ( (enable_red+enable_green+enable_orange+enable_blue) == 0 ) | |
333 | exit(0); | |
334 | ||
335 | // open needed ports | |
336 | // todo: read a nat_t indicator to allow or not openning UDP/4500 | |
337 | if (enable_red==2) | |
338 | open_physical(if_red, 4500); | |
339 | ||
340 | if (enable_green==2) | |
341 | open_physical(if_green, 4500); | |
342 | ||
343 | if (enable_orange==2) | |
344 | open_physical(if_orange, 4500); | |
345 | ||
346 | if (enable_blue==2) | |
347 | open_physical(if_blue, 4500); | |
348 | ||
69dcc425 CS |
349 | // start the system |
350 | if ((argc == 2) && strcmp(argv[1], "S") == 0) { | |
69dcc425 | 351 | safe_system("/etc/rc.d/init.d/ipsec restart >/dev/null"); |
0f57633b | 352 | safe_system("/usr/local/bin/vpn-watch &"); |
69dcc425 CS |
353 | exit(0); |
354 | } | |
355 | ||
356 | // it is a selective start or stop | |
357 | // second param is only a number 'key' | |
358 | if ((argc == 2) || strspn(argv[2], NUMBERS) != strlen(argv[2])) { | |
359 | ipsec_norules(); | |
360 | fprintf(stderr, "Bad arg\n"); | |
361 | usage(); | |
362 | exit(1); | |
363 | } | |
364 | ||
365 | // search the vpn pointed by 'key' | |
366 | if (!(file = fopen(CONFIG_ROOT "/vpn/config", "r"))) { | |
367 | ipsec_norules(); | |
368 | fprintf(stderr, "Couldn't open vpn settings file"); | |
369 | exit(1); | |
370 | } | |
371 | while (fgets(s, STRING_SIZE, file) != NULL) { | |
372 | char *key; | |
373 | char *name; | |
374 | char *type; | |
375 | char *interface; | |
376 | if (!decode_line(s,&key,&name,&type,&interface)) | |
377 | continue; | |
378 | ||
379 | // start/stop a vpn if belonging to specified interface | |
380 | if (strcmp(argv[1], interface) == 0 ) { | |
381 | if (strcmp(argv[2], "0")==0) | |
382 | turn_connection_off (name); | |
383 | else | |
384 | turn_connection_on (name, type); | |
385 | continue; | |
386 | } | |
387 | // is it the 'key' requested ? | |
388 | if (strcmp(argv[2], key) != 0) | |
389 | continue; | |
390 | // Start or Delete this Connection | |
391 | if (strcmp(argv[1], "S") == 0) | |
392 | turn_connection_on (name, type); | |
393 | else | |
394 | if (strcmp(argv[1], "D") == 0) | |
395 | turn_connection_off (name); | |
396 | else { | |
397 | ipsec_norules(); | |
398 | fprintf(stderr, "Bad command\n"); | |
399 | exit(1); | |
400 | } | |
401 | } | |
402 | fclose(file); | |
69dcc425 | 403 | return 0; |
05207d69 | 404 | } |