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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> | |
52e54c1c | 16 | |
05207d69 | 17 | #include "setuid.h" |
52e54c1c | 18 | #include "netutil.h" |
05207d69 | 19 | |
5fd30232 MT |
20 | /* |
21 | This module is responsible for start stop of the vpn system. | |
22 | ||
23 | 1) it allows AH & ESP to get in from interface where a vpn is mounted | |
69dcc425 | 24 | The NAT traversal is used on the udp 4500 port. |
5fd30232 MT |
25 | |
26 | 2) it starts the ipsec daemon | |
69dcc425 CS |
27 | The RED interface is a problem because it can be up or down a startup. |
28 | Then, the state change and it must not affect other VPN mounted on | |
29 | other interface. | |
30 | Unfortunatly, openswan 1 cannot do that correctly. It cannot use an | |
31 | interface without restarting everything. | |
5fd30232 MT |
32 | |
33 | */ | |
34 | ||
05207d69 | 35 | void usage() { |
69dcc425 CS |
36 | fprintf (stderr, "Usage:\n"); |
37 | fprintf (stderr, "\tipsecctrl S [connectionkey]\n"); | |
38 | fprintf (stderr, "\tipsecctrl D [connectionkey]\n"); | |
39 | fprintf (stderr, "\tipsecctrl R\n"); | |
db073a10 | 40 | fprintf (stderr, "\tipsecctrl I\n"); |
69dcc425 CS |
41 | fprintf (stderr, "\t\tS : Start/Restart Connection\n"); |
42 | fprintf (stderr, "\t\tD : Stop Connection\n"); | |
43 | fprintf (stderr, "\t\tR : Reload Certificates and Secrets\n"); | |
db073a10 | 44 | fprintf (stderr, "\t\tI : Print Statusinfo\n"); |
05207d69 MT |
45 | } |
46 | ||
8fcb9253 MT |
47 | static void ipsec_reload() { |
48 | /* Re-read all configuration files and secrets and | |
49 | * reload the daemon (#10339). | |
50 | */ | |
51 | safe_system("/usr/sbin/ipsec rereadall >/dev/null 2>&1"); | |
52 | safe_system("/usr/sbin/ipsec reload >/dev/null 2>&1"); | |
53 | } | |
54 | ||
5fd30232 | 55 | /* |
69dcc425 | 56 | ACCEPT the ipsec protocol ah, esp & udp (for nat traversal) on the specified interface |
5fd30232 MT |
57 | */ |
58 | void open_physical (char *interface, int nat_traversal_port) { | |
69dcc425 CS |
59 | char str[STRING_SIZE]; |
60 | ||
69dcc425 | 61 | // IKE |
a9600358 | 62 | sprintf(str, "/sbin/iptables --wait -D IPSECINPUT -p udp -i %s --dport 500 -j ACCEPT >/dev/null 2>&1", interface); |
1f324fd7 | 63 | safe_system(str); |
a9600358 | 64 | sprintf(str, "/sbin/iptables --wait -A IPSECINPUT -p udp -i %s --dport 500 -j ACCEPT", interface); |
db073a10 | 65 | safe_system(str); |
69dcc425 CS |
66 | |
67 | if (! nat_traversal_port) | |
68 | return; | |
69 | ||
a9600358 | 70 | sprintf(str, "/sbin/iptables --wait -D IPSECINPUT -p udp -i %s --dport %i -j ACCEPT >/dev/null 2>&1", interface, nat_traversal_port); |
1f324fd7 | 71 | safe_system(str); |
a9600358 | 72 | sprintf(str, "/sbin/iptables --wait -A IPSECINPUT -p udp -i %s --dport %i -j ACCEPT", interface, nat_traversal_port); |
db073a10 | 73 | safe_system(str); |
5fd30232 MT |
74 | } |
75 | ||
76 | void ipsec_norules() { | |
69dcc425 | 77 | /* clear input rules */ |
a9600358 MT |
78 | safe_system("/sbin/iptables --wait -F IPSECINPUT"); |
79 | safe_system("/sbin/iptables --wait -F IPSECFORWARD"); | |
80 | safe_system("/sbin/iptables --wait -F IPSECOUTPUT"); | |
05207d69 MT |
81 | } |
82 | ||
5fd30232 MT |
83 | /* |
84 | return values from the vpn config file or false if not 'on' | |
85 | */ | |
86 | int decode_line (char *s, | |
69dcc425 CS |
87 | char **key, |
88 | char **name, | |
9f0b5c9f | 89 | char **type |
69dcc425 CS |
90 | ) { |
91 | int count = 0; | |
92 | *key = NULL; | |
93 | *name = NULL; | |
94 | *type = NULL; | |
95 | ||
96 | if (s[strlen(s) - 1] == '\n') | |
97 | s[strlen(s) - 1] = '\0'; | |
98 | ||
99 | char *result = strsep(&s, ","); | |
100 | while (result) { | |
101 | if (count == 0) | |
102 | *key = result; | |
103 | if ((count == 1) && strcmp(result, "on") != 0) | |
104 | return 0; // a disabled line | |
105 | if (count == 2) | |
106 | *name = result; | |
107 | if (count == 4) | |
108 | *type = result; | |
69dcc425 CS |
109 | count++; |
110 | result = strsep(&s, ","); | |
111 | } | |
112 | ||
113 | // check other syntax | |
114 | if (! *name) | |
115 | return 0; | |
116 | ||
117 | if (strspn(*name, LETTERS_NUMBERS) != strlen(*name)) { | |
118 | fprintf(stderr, "Bad connection name: %s\n", *name); | |
119 | return 0; | |
120 | } | |
121 | ||
122 | if (! (strcmp(*type, "host") == 0 || strcmp(*type, "net") == 0)) { | |
123 | fprintf(stderr, "Bad connection type: %s\n", *type); | |
124 | return 0; | |
125 | } | |
126 | ||
69dcc425 CS |
127 | //it's a valid & active line |
128 | return 1; | |
5fd30232 MT |
129 | } |
130 | ||
131 | /* | |
132 | issue ipsec commmands to turn on connection 'name' | |
133 | */ | |
9f0b5c9f MT |
134 | void turn_connection_on(char *name, char *type) { |
135 | /* | |
136 | * To bring up a connection, we need to reload the configuration | |
137 | * and issue ipsec up afterwards. To make sure the connection | |
138 | * is not established from the start, we bring it down in advance. | |
139 | */ | |
6e2ba31b | 140 | char command[STRING_SIZE]; |
6e2ba31b | 141 | |
9f0b5c9f | 142 | // Bring down the connection (if established). |
6e2ba31b | 143 | snprintf(command, STRING_SIZE - 1, |
9f0b5c9f | 144 | "/usr/sbin/ipsec down %s >/dev/null", name); |
6e2ba31b | 145 | safe_system(command); |
6e2ba31b | 146 | |
80fbd899 MT |
147 | // Reload the IPsec block chain |
148 | safe_system("/usr/lib/firewall/ipsec-block >/dev/null"); | |
149 | ||
8e2683f7 MT |
150 | // Reload the configuration into the daemon (#10339). |
151 | ipsec_reload(); | |
6e2ba31b | 152 | |
9f0b5c9f MT |
153 | // Bring the connection up again. |
154 | snprintf(command, STRING_SIZE - 1, | |
155 | "/usr/sbin/ipsec up %s >/dev/null", name); | |
156 | safe_system(command); | |
5fd30232 | 157 | } |
9f0b5c9f | 158 | |
5fd30232 MT |
159 | /* |
160 | issue ipsec commmands to turn off connection 'name' | |
161 | */ | |
162 | void turn_connection_off (char *name) { | |
9f0b5c9f MT |
163 | /* |
164 | * To turn off a connection, all SAs must be turned down. | |
165 | * After that, the configuration must be reloaded. | |
166 | */ | |
69dcc425 | 167 | char command[STRING_SIZE]; |
9f0b5c9f MT |
168 | |
169 | // Bring down the connection. | |
3e077ef3 | 170 | snprintf(command, STRING_SIZE - 1, |
9f0b5c9f | 171 | "/usr/sbin/ipsec down %s >/dev/null", name); |
3e077ef3 | 172 | safe_system(command); |
6e2ba31b | 173 | |
9f0b5c9f | 174 | // Reload, so the connection is dropped. |
8e2683f7 | 175 | ipsec_reload(); |
4f6790a7 MT |
176 | |
177 | // Reload the IPsec block chain | |
178 | safe_system("/usr/lib/firewall/ipsec-block >/dev/null"); | |
8e2683f7 MT |
179 | } |
180 | ||
05207d69 | 181 | int main(int argc, char *argv[]) { |
69dcc425 CS |
182 | char configtype[STRING_SIZE]; |
183 | char redtype[STRING_SIZE] = ""; | |
184 | struct keyvalue *kv = NULL; | |
185 | ||
186 | if (argc < 2) { | |
187 | usage(); | |
188 | exit(1); | |
189 | } | |
190 | if (!(initsetuid())) | |
191 | exit(1); | |
192 | ||
fe6cda92 | 193 | FILE *file = NULL; |
69dcc425 | 194 | |
ba149d47 AF |
195 | |
196 | if (strcmp(argv[1], "I") == 0) { | |
9f0b5c9f | 197 | safe_system("/usr/sbin/ipsec status"); |
ba149d47 AF |
198 | exit(0); |
199 | } | |
200 | ||
201 | if (strcmp(argv[1], "R") == 0) { | |
8e2683f7 | 202 | ipsec_reload(); |
ba149d47 AF |
203 | exit(0); |
204 | } | |
205 | ||
69dcc425 CS |
206 | /* FIXME: workaround for pclose() issue - still no real idea why |
207 | * this is happening */ | |
208 | signal(SIGCHLD, SIG_DFL); | |
209 | ||
210 | /* handle operations that doesn't need start the ipsec system */ | |
211 | if (argc == 2) { | |
212 | if (strcmp(argv[1], "D") == 0) { | |
9f0b5c9f | 213 | safe_system("/usr/sbin/ipsec stop >/dev/null 2>&1"); |
1f324fd7 | 214 | ipsec_norules(); |
69dcc425 CS |
215 | exit(0); |
216 | } | |
69dcc425 CS |
217 | } |
218 | ||
69dcc425 CS |
219 | /* read vpn config */ |
220 | kv=initkeyvalues(); | |
221 | if (!readkeyvalues(kv, CONFIG_ROOT "/vpn/settings")) | |
222 | { | |
223 | fprintf(stderr, "Cannot read vpn settings\n"); | |
224 | exit(1); | |
225 | } | |
226 | ||
227 | /* check is the vpn system is enabled */ | |
228 | { | |
229 | char s[STRING_SIZE]; | |
230 | findkey(kv, "ENABLED", s); | |
231 | freekeyvalues(kv); | |
232 | if (strcmp (s, "on") != 0) | |
233 | exit(0); | |
234 | } | |
235 | ||
236 | /* read interface settings */ | |
237 | kv=initkeyvalues(); | |
238 | if (!readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings")) | |
239 | { | |
240 | fprintf(stderr, "Cannot read ethernet settings\n"); | |
241 | exit(1); | |
242 | } | |
243 | if (!findkey(kv, "CONFIG_TYPE", configtype)) | |
244 | { | |
245 | fprintf(stderr, "Cannot read CONFIG_TYPE\n"); | |
246 | exit(1); | |
247 | } | |
248 | findkey(kv, "RED_TYPE", redtype); | |
249 | ||
250 | ||
251 | /* Loop through the config file to find physical interface that will accept IPSEC */ | |
252 | int enable_red=0; // states 0: not used | |
253 | int enable_green=0; // 1: error condition | |
254 | int enable_orange=0; // 2: good | |
255 | int enable_blue=0; | |
256 | char if_red[STRING_SIZE] = ""; | |
257 | char if_green[STRING_SIZE] = ""; | |
258 | char if_orange[STRING_SIZE] = ""; | |
259 | char if_blue[STRING_SIZE] = ""; | |
260 | char s[STRING_SIZE]; | |
261 | ||
9f0b5c9f MT |
262 | // when RED is up, find interface name in special file |
263 | FILE *ifacefile = NULL; | |
264 | if ((ifacefile = fopen(CONFIG_ROOT "/red/iface", "r"))) { | |
265 | if (fgets(if_red, STRING_SIZE, ifacefile)) { | |
266 | if (if_red[strlen(if_red) - 1] == '\n') | |
267 | if_red[strlen(if_red) - 1] = '\0'; | |
69dcc425 | 268 | } |
9f0b5c9f | 269 | fclose (ifacefile); |
69dcc425 | 270 | |
9f0b5c9f MT |
271 | if (VALID_DEVICE(if_red)) |
272 | enable_red++; | |
273 | } | |
69dcc425 | 274 | |
9f0b5c9f MT |
275 | // Check if GREEN is enabled. |
276 | findkey(kv, "GREEN_DEV", if_green); | |
277 | if (VALID_DEVICE(if_green)) | |
278 | enable_green++; | |
9f0b5c9f MT |
279 | |
280 | // Check if ORANGE is enabled. | |
281 | findkey(kv, "ORANGE_DEV", if_orange); | |
282 | if (VALID_DEVICE(if_orange)) | |
283 | enable_orange++; | |
9f0b5c9f MT |
284 | |
285 | // Check if BLUE is enabled. | |
286 | findkey(kv, "BLUE_DEV", if_blue); | |
287 | if (VALID_DEVICE(if_blue)) | |
288 | enable_blue++; | |
69dcc425 | 289 | |
69dcc425 CS |
290 | freekeyvalues(kv); |
291 | ||
69dcc425 | 292 | // exit if nothing to do |
9f0b5c9f | 293 | if ((enable_red+enable_green+enable_orange+enable_blue) == 0) |
69dcc425 CS |
294 | exit(0); |
295 | ||
296 | // open needed ports | |
9f0b5c9f | 297 | if (enable_red > 0) |
69dcc425 CS |
298 | open_physical(if_red, 4500); |
299 | ||
9f0b5c9f | 300 | if (enable_green > 0) |
69dcc425 CS |
301 | open_physical(if_green, 4500); |
302 | ||
9f0b5c9f | 303 | if (enable_orange > 0) |
69dcc425 CS |
304 | open_physical(if_orange, 4500); |
305 | ||
9f0b5c9f | 306 | if (enable_blue > 0) |
69dcc425 CS |
307 | open_physical(if_blue, 4500); |
308 | ||
69dcc425 CS |
309 | // start the system |
310 | if ((argc == 2) && strcmp(argv[1], "S") == 0) { | |
80fbd899 | 311 | safe_system("/usr/lib/firewall/ipsec-block >/dev/null"); |
9f0b5c9f | 312 | safe_system("/usr/sbin/ipsec restart >/dev/null"); |
69dcc425 CS |
313 | exit(0); |
314 | } | |
315 | ||
316 | // it is a selective start or stop | |
317 | // second param is only a number 'key' | |
318 | if ((argc == 2) || strspn(argv[2], NUMBERS) != strlen(argv[2])) { | |
9f0b5c9f | 319 | fprintf(stderr, "Bad arg: %s\n", argv[2]); |
69dcc425 CS |
320 | usage(); |
321 | exit(1); | |
322 | } | |
323 | ||
324 | // search the vpn pointed by 'key' | |
325 | if (!(file = fopen(CONFIG_ROOT "/vpn/config", "r"))) { | |
69dcc425 CS |
326 | fprintf(stderr, "Couldn't open vpn settings file"); |
327 | exit(1); | |
328 | } | |
329 | while (fgets(s, STRING_SIZE, file) != NULL) { | |
330 | char *key; | |
331 | char *name; | |
332 | char *type; | |
9f0b5c9f | 333 | if (!decode_line(s,&key,&name,&type)) |
69dcc425 CS |
334 | continue; |
335 | ||
69dcc425 CS |
336 | // is it the 'key' requested ? |
337 | if (strcmp(argv[2], key) != 0) | |
338 | continue; | |
9f0b5c9f | 339 | |
69dcc425 CS |
340 | // Start or Delete this Connection |
341 | if (strcmp(argv[1], "S") == 0) | |
342 | turn_connection_on (name, type); | |
9f0b5c9f | 343 | else if (strcmp(argv[1], "D") == 0) |
69dcc425 CS |
344 | turn_connection_off (name); |
345 | else { | |
69dcc425 CS |
346 | fprintf(stderr, "Bad command\n"); |
347 | exit(1); | |
348 | } | |
349 | } | |
350 | fclose(file); | |
9f0b5c9f | 351 | |
69dcc425 | 352 | return 0; |
05207d69 | 353 | } |