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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 |
1f324fd7 | 61 | |
85cbc0a0 | 62 | sprintf(str, "/sbin/iptables -D IPSECINPUT -p udp -i %s --dport 500 -j ACCEPT >/dev/null 2>&1", interface); |
1f324fd7 | 63 | safe_system(str); |
85cbc0a0 | 64 | sprintf(str, "/sbin/iptables -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 | ||
1f324fd7 AF |
70 | sprintf(str, "/sbin/iptables -D IPSECINPUT -p udp -i %s --dport %i -j ACCEPT >/dev/null 2>&1", interface, nat_traversal_port); |
71 | safe_system(str); | |
db073a10 AF |
72 | sprintf(str, "/sbin/iptables -A IPSECINPUT -p udp -i %s --dport %i -j ACCEPT", interface, nat_traversal_port); |
73 | safe_system(str); | |
5fd30232 MT |
74 | } |
75 | ||
76 | void ipsec_norules() { | |
69dcc425 | 77 | /* clear input rules */ |
db073a10 AF |
78 | safe_system("/sbin/iptables -F IPSECINPUT"); |
79 | safe_system("/sbin/iptables -F IPSECFORWARD"); | |
80 | safe_system("/sbin/iptables -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 | |
9f0b5c9f MT |
147 | // Reload the configuration into the daemon. |
148 | safe_system("/usr/sbin/ipsec reload >/dev/null 2>&1"); | |
6e2ba31b | 149 | |
9f0b5c9f MT |
150 | // Bring the connection up again. |
151 | snprintf(command, STRING_SIZE - 1, | |
152 | "/usr/sbin/ipsec up %s >/dev/null", name); | |
153 | safe_system(command); | |
5fd30232 | 154 | } |
9f0b5c9f | 155 | |
5fd30232 MT |
156 | /* |
157 | issue ipsec commmands to turn off connection 'name' | |
158 | */ | |
159 | void turn_connection_off (char *name) { | |
9f0b5c9f MT |
160 | /* |
161 | * To turn off a connection, all SAs must be turned down. | |
162 | * After that, the configuration must be reloaded. | |
163 | */ | |
69dcc425 | 164 | char command[STRING_SIZE]; |
9f0b5c9f MT |
165 | |
166 | // Bring down the connection. | |
3e077ef3 | 167 | snprintf(command, STRING_SIZE - 1, |
9f0b5c9f | 168 | "/usr/sbin/ipsec down %s >/dev/null", name); |
3e077ef3 | 169 | safe_system(command); |
6e2ba31b | 170 | |
9f0b5c9f MT |
171 | // Reload, so the connection is dropped. |
172 | safe_system("/usr/sbin/ipsec reload >/dev/null 2>&1"); | |
5fd30232 MT |
173 | } |
174 | ||
05207d69 | 175 | int main(int argc, char *argv[]) { |
69dcc425 CS |
176 | char configtype[STRING_SIZE]; |
177 | char redtype[STRING_SIZE] = ""; | |
178 | struct keyvalue *kv = NULL; | |
179 | ||
180 | if (argc < 2) { | |
181 | usage(); | |
182 | exit(1); | |
183 | } | |
184 | if (!(initsetuid())) | |
185 | exit(1); | |
186 | ||
fe6cda92 | 187 | FILE *file = NULL; |
69dcc425 | 188 | |
ba149d47 AF |
189 | |
190 | if (strcmp(argv[1], "I") == 0) { | |
9f0b5c9f | 191 | safe_system("/usr/sbin/ipsec status"); |
ba149d47 AF |
192 | exit(0); |
193 | } | |
194 | ||
195 | if (strcmp(argv[1], "R") == 0) { | |
9f0b5c9f | 196 | safe_system("/usr/sbin/ipsec reload >/dev/null 2>&1"); |
ba149d47 AF |
197 | exit(0); |
198 | } | |
199 | ||
69dcc425 CS |
200 | /* FIXME: workaround for pclose() issue - still no real idea why |
201 | * this is happening */ | |
202 | signal(SIGCHLD, SIG_DFL); | |
203 | ||
204 | /* handle operations that doesn't need start the ipsec system */ | |
205 | if (argc == 2) { | |
206 | if (strcmp(argv[1], "D") == 0) { | |
9f0b5c9f | 207 | safe_system("/usr/sbin/ipsec stop >/dev/null 2>&1"); |
1f324fd7 | 208 | ipsec_norules(); |
69dcc425 CS |
209 | exit(0); |
210 | } | |
69dcc425 CS |
211 | } |
212 | ||
69dcc425 CS |
213 | /* read vpn config */ |
214 | kv=initkeyvalues(); | |
215 | if (!readkeyvalues(kv, CONFIG_ROOT "/vpn/settings")) | |
216 | { | |
217 | fprintf(stderr, "Cannot read vpn settings\n"); | |
218 | exit(1); | |
219 | } | |
220 | ||
221 | /* check is the vpn system is enabled */ | |
222 | { | |
223 | char s[STRING_SIZE]; | |
224 | findkey(kv, "ENABLED", s); | |
225 | freekeyvalues(kv); | |
226 | if (strcmp (s, "on") != 0) | |
227 | exit(0); | |
228 | } | |
229 | ||
230 | /* read interface settings */ | |
231 | kv=initkeyvalues(); | |
232 | if (!readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings")) | |
233 | { | |
234 | fprintf(stderr, "Cannot read ethernet settings\n"); | |
235 | exit(1); | |
236 | } | |
237 | if (!findkey(kv, "CONFIG_TYPE", configtype)) | |
238 | { | |
239 | fprintf(stderr, "Cannot read CONFIG_TYPE\n"); | |
240 | exit(1); | |
241 | } | |
242 | findkey(kv, "RED_TYPE", redtype); | |
243 | ||
244 | ||
245 | /* Loop through the config file to find physical interface that will accept IPSEC */ | |
246 | int enable_red=0; // states 0: not used | |
247 | int enable_green=0; // 1: error condition | |
248 | int enable_orange=0; // 2: good | |
249 | int enable_blue=0; | |
250 | char if_red[STRING_SIZE] = ""; | |
251 | char if_green[STRING_SIZE] = ""; | |
252 | char if_orange[STRING_SIZE] = ""; | |
253 | char if_blue[STRING_SIZE] = ""; | |
254 | char s[STRING_SIZE]; | |
255 | ||
9f0b5c9f MT |
256 | // when RED is up, find interface name in special file |
257 | FILE *ifacefile = NULL; | |
258 | if ((ifacefile = fopen(CONFIG_ROOT "/red/iface", "r"))) { | |
259 | if (fgets(if_red, STRING_SIZE, ifacefile)) { | |
260 | if (if_red[strlen(if_red) - 1] == '\n') | |
261 | if_red[strlen(if_red) - 1] = '\0'; | |
69dcc425 | 262 | } |
9f0b5c9f | 263 | fclose (ifacefile); |
69dcc425 | 264 | |
9f0b5c9f MT |
265 | if (VALID_DEVICE(if_red)) |
266 | enable_red++; | |
267 | } | |
69dcc425 | 268 | |
9f0b5c9f MT |
269 | // Check if GREEN is enabled. |
270 | findkey(kv, "GREEN_DEV", if_green); | |
271 | if (VALID_DEVICE(if_green)) | |
272 | enable_green++; | |
9f0b5c9f MT |
273 | |
274 | // Check if ORANGE is enabled. | |
275 | findkey(kv, "ORANGE_DEV", if_orange); | |
276 | if (VALID_DEVICE(if_orange)) | |
277 | enable_orange++; | |
9f0b5c9f MT |
278 | |
279 | // Check if BLUE is enabled. | |
280 | findkey(kv, "BLUE_DEV", if_blue); | |
281 | if (VALID_DEVICE(if_blue)) | |
282 | enable_blue++; | |
69dcc425 | 283 | |
69dcc425 CS |
284 | freekeyvalues(kv); |
285 | ||
69dcc425 | 286 | // exit if nothing to do |
9f0b5c9f | 287 | if ((enable_red+enable_green+enable_orange+enable_blue) == 0) |
69dcc425 CS |
288 | exit(0); |
289 | ||
290 | // open needed ports | |
9f0b5c9f | 291 | if (enable_red > 0) |
69dcc425 CS |
292 | open_physical(if_red, 4500); |
293 | ||
9f0b5c9f | 294 | if (enable_green > 0) |
69dcc425 CS |
295 | open_physical(if_green, 4500); |
296 | ||
9f0b5c9f | 297 | if (enable_orange > 0) |
69dcc425 CS |
298 | open_physical(if_orange, 4500); |
299 | ||
9f0b5c9f | 300 | if (enable_blue > 0) |
69dcc425 CS |
301 | open_physical(if_blue, 4500); |
302 | ||
69dcc425 CS |
303 | // start the system |
304 | if ((argc == 2) && strcmp(argv[1], "S") == 0) { | |
9f0b5c9f | 305 | safe_system("/usr/sbin/ipsec restart >/dev/null"); |
69dcc425 CS |
306 | exit(0); |
307 | } | |
308 | ||
309 | // it is a selective start or stop | |
310 | // second param is only a number 'key' | |
311 | if ((argc == 2) || strspn(argv[2], NUMBERS) != strlen(argv[2])) { | |
9f0b5c9f | 312 | fprintf(stderr, "Bad arg: %s\n", argv[2]); |
69dcc425 CS |
313 | usage(); |
314 | exit(1); | |
315 | } | |
316 | ||
317 | // search the vpn pointed by 'key' | |
318 | if (!(file = fopen(CONFIG_ROOT "/vpn/config", "r"))) { | |
69dcc425 CS |
319 | fprintf(stderr, "Couldn't open vpn settings file"); |
320 | exit(1); | |
321 | } | |
322 | while (fgets(s, STRING_SIZE, file) != NULL) { | |
323 | char *key; | |
324 | char *name; | |
325 | char *type; | |
9f0b5c9f | 326 | if (!decode_line(s,&key,&name,&type)) |
69dcc425 CS |
327 | continue; |
328 | ||
69dcc425 CS |
329 | // is it the 'key' requested ? |
330 | if (strcmp(argv[2], key) != 0) | |
331 | continue; | |
9f0b5c9f | 332 | |
69dcc425 CS |
333 | // Start or Delete this Connection |
334 | if (strcmp(argv[1], "S") == 0) | |
335 | turn_connection_on (name, type); | |
9f0b5c9f | 336 | else if (strcmp(argv[1], "D") == 0) |
69dcc425 CS |
337 | turn_connection_off (name); |
338 | else { | |
69dcc425 CS |
339 | fprintf(stderr, "Bad command\n"); |
340 | exit(1); | |
341 | } | |
342 | } | |
343 | fclose(file); | |
9f0b5c9f | 344 | |
69dcc425 | 345 | return 0; |
05207d69 | 346 | } |