]>
git.ipfire.org Git - ipfire-2.x.git/blob - src/misc-progs/ipsecctrl.c
3 * File originally from the Smoothwall project
4 * (c) 2001 Smoothwall Team
13 #include <sys/types.h>
19 This module is responsible for start stop of the vpn system.
21 1) it allows AH & ESP to get in from interface where a vpn is mounted
22 The NAT traversal is used on the udp 4500 port.
24 2) it starts the ipsec daemon
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
28 Unfortunatly, openswan 1 cannot do that correctly. It cannot use an
29 interface without restarting everything.
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");
38 fprintf (stderr
, "\tipsecctrl I\n");
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");
42 fprintf (stderr
, "\t\tI : Print Statusinfo\n");
46 ACCEPT the ipsec protocol ah, esp & udp (for nat traversal) on the specified interface
48 void open_physical (char *interface
, int nat_traversal_port
) {
49 char str
[STRING_SIZE
];
52 // sprintf(str, "/sbin/iptables -A " phystable " -p 47 -i %s -j ACCEPT", interface);
55 // sprintf(str, "/sbin/iptables -A " phystable " -p 50 -i %s -j ACCEPT", interface);
58 // sprintf(str, "/sbin/iptables -A " phystable " -p 51 -i %s -j ACCEPT", interface);
61 sprintf(str
, "/sbin/iptables -A IPSECINPUT -p udp -i %s --sport 500 --dport 500 -j ACCEPT", interface
);
64 if (! nat_traversal_port
)
67 sprintf(str
, "/sbin/iptables -A IPSECINPUT -p udp -i %s --dport %i -j ACCEPT", interface
, nat_traversal_port
);
71 void ipsec_norules() {
72 /* clear input rules */
73 safe_system("/sbin/iptables -F IPSECINPUT");
74 safe_system("/sbin/iptables -F IPSECFORWARD");
75 safe_system("/sbin/iptables -F IPSECOUTPUT");
80 return values from the vpn config file or false if not 'on'
82 int decode_line (char *s
,
93 if (s
[strlen(s
) - 1] == '\n')
94 s
[strlen(s
) - 1] = '\0';
96 char *result
= strsep(&s
, ",");
100 if ((count
== 1) && strcmp(result
, "on") != 0)
101 return 0; // a disabled line
109 result
= strsep(&s
, ",");
112 // check other syntax
116 if (strspn(*name
, LETTERS_NUMBERS
) != strlen(*name
)) {
117 fprintf(stderr
, "Bad connection name: %s\n", *name
);
121 if (! (strcmp(*type
, "host") == 0 || strcmp(*type
, "net") == 0)) {
122 fprintf(stderr
, "Bad connection type: %s\n", *type
);
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
);
131 //it's a valid & active line
136 issue ipsec commmands to turn on connection 'name'
138 void turn_connection_on (char *name
, char *type
) {
139 char command
[STRING_SIZE
];
141 safe_system("/usr/sbin/ipsec reload >/dev/null");
142 memset(command
, 0, STRING_SIZE
);
143 /* give ipsec time to be ready */
144 safe_system("/bin/sleep 2");
145 snprintf(command
, STRING_SIZE
- 1,
146 "/usr/sbin/ipsec up %s >/dev/null", name
);
147 safe_system(command
);
150 issue ipsec commmands to turn off connection 'name'
152 void turn_connection_off (char *name
) {
153 char command
[STRING_SIZE
];
154 memset(command
, 0, STRING_SIZE
);
155 snprintf(command
, STRING_SIZE
- 1,
156 "/usr/sbin/ipsec whack --delete --name %s >/dev/null", name
);
157 safe_system(command
);
158 safe_system("/usr/sbin/ipsec whack --rereadall >/dev/null");
162 int main(int argc
, char *argv
[]) {
164 char configtype
[STRING_SIZE
];
165 char redtype
[STRING_SIZE
] = "";
166 struct keyvalue
*kv
= NULL
;
178 if (strcmp(argv
[1], "I") == 0) {
179 safe_system("/usr/sbin/ipsec whack --status");
183 if (strcmp(argv
[1], "R") == 0) {
184 safe_system("/usr/sbin/ipsec whack --rereadall >/dev/null");
188 /* Get vpnwatch pid */
190 if ( (argc
== 2) && (file
= fopen("/var/run/vpn-watch.pid", "r"))) {
191 safe_system("kill -9 $(cat /var/run/vpn-watch.pid)");
192 safe_system("unlink /var/run/vpn-watch.pid");
196 /* FIXME: workaround for pclose() issue - still no real idea why
197 * this is happening */
198 signal(SIGCHLD
, SIG_DFL
);
200 /* handle operations that doesn't need start the ipsec system */
202 if (strcmp(argv
[1], "D") == 0) {
204 /* Only shutdown pluto if it really is running */
206 if (file
= fopen("/var/run/pluto.pid", "r")) {
207 safe_system("/etc/rc.d/init.d/ipsec stop 2> /dev/null >/dev/null");
215 /* clear iptables vpn rules */
218 /* read vpn config */
220 if (!readkeyvalues(kv
, CONFIG_ROOT
"/vpn/settings"))
222 fprintf(stderr
, "Cannot read vpn settings\n");
226 /* check is the vpn system is enabled */
229 findkey(kv
, "ENABLED", s
);
231 if (strcmp (s
, "on") != 0)
235 /* read interface settings */
237 if (!readkeyvalues(kv
, CONFIG_ROOT
"/ethernet/settings"))
239 fprintf(stderr
, "Cannot read ethernet settings\n");
242 if (!findkey(kv
, "CONFIG_TYPE", configtype
))
244 fprintf(stderr
, "Cannot read CONFIG_TYPE\n");
247 findkey(kv
, "RED_TYPE", redtype
);
250 /* Loop through the config file to find physical interface that will accept IPSEC */
251 int enable_red
=0; // states 0: not used
252 int enable_green
=0; // 1: error condition
253 int enable_orange
=0; // 2: good
255 char if_red
[STRING_SIZE
] = "";
256 char if_green
[STRING_SIZE
] = "";
257 char if_orange
[STRING_SIZE
] = "";
258 char if_blue
[STRING_SIZE
] = "";
261 if (!(file
= fopen(CONFIG_ROOT
"/vpn/config", "r"))) {
262 fprintf(stderr
, "Couldn't open vpn settings file");
265 while (fgets(s
, STRING_SIZE
, file
) != NULL
) {
270 if (!decode_line(s
,&key
,&name
,&type
,&interface
))
272 /* search interface */
273 if (!enable_red
&& strcmp (interface
, "RED") == 0) {
274 // when RED is up, find interface name in special file
275 FILE *ifacefile
= NULL
;
276 if ((ifacefile
= fopen(CONFIG_ROOT
"/red/iface", "r"))) {
277 if (fgets(if_red
, STRING_SIZE
, ifacefile
)) {
278 if (if_red
[strlen(if_red
) - 1] == '\n')
279 if_red
[strlen(if_red
) - 1] = '\0';
283 if (VALID_DEVICE(if_red
))
284 enable_red
+=2; // present and running
288 if (!enable_green
&& strcmp (interface
, "GREEN") == 0) {
290 findkey(kv
, "GREEN_DEV", if_green
);
291 if (VALID_DEVICE(if_green
))
294 fprintf(stderr
, "IPSec enabled on green but green interface is invalid or not found\n");
297 if (!enable_orange
&& strcmp (interface
, "ORANGE") == 0) {
299 findkey(kv
, "ORANGE_DEV", if_orange
);
300 if (VALID_DEVICE(if_orange
))
303 fprintf(stderr
, "IPSec enabled on orange but orange interface is invalid or not found\n");
306 if (!enable_blue
&& strcmp (interface
, "BLUE") == 0) {
308 findkey(kv
, "BLUE_DEV", if_blue
);
309 if (VALID_DEVICE(if_blue
))
312 fprintf(stderr
, "IPSec enabled on blue but blue interface is invalid or not found\n");
319 // do nothing if something is in error condition
320 if ((enable_red
==1) || (enable_green
==1) || (enable_orange
==1) || (enable_blue
==1) )
323 // exit if nothing to do
324 if ( (enable_red
+enable_green
+enable_orange
+enable_blue
) == 0 )
328 // todo: read a nat_t indicator to allow or not openning UDP/4500
330 open_physical(if_red
, 4500);
333 open_physical(if_green
, 4500);
335 if (enable_orange
==2)
336 open_physical(if_orange
, 4500);
339 open_physical(if_blue
, 4500);
342 if ((argc
== 2) && strcmp(argv
[1], "S") == 0) {
343 safe_system("/etc/rc.d/init.d/ipsec restart >/dev/null");
344 safe_system("/usr/local/bin/vpn-watch &");
348 // it is a selective start or stop
349 // second param is only a number 'key'
350 if ((argc
== 2) || strspn(argv
[2], NUMBERS
) != strlen(argv
[2])) {
352 fprintf(stderr
, "Bad arg\n");
357 // search the vpn pointed by 'key'
358 if (!(file
= fopen(CONFIG_ROOT
"/vpn/config", "r"))) {
360 fprintf(stderr
, "Couldn't open vpn settings file");
363 while (fgets(s
, STRING_SIZE
, file
) != NULL
) {
368 if (!decode_line(s
,&key
,&name
,&type
,&interface
))
371 // start/stop a vpn if belonging to specified interface
372 if (strcmp(argv
[1], interface
) == 0 ) {
373 if (strcmp(argv
[2], "0")==0)
374 turn_connection_off (name
);
376 turn_connection_on (name
, type
);
379 // is it the 'key' requested ?
380 if (strcmp(argv
[2], key
) != 0)
382 // Start or Delete this Connection
383 if (strcmp(argv
[1], "S") == 0)
384 turn_connection_on (name
, type
);
386 if (strcmp(argv
[1], "D") == 0)
387 turn_connection_off (name
);
390 fprintf(stderr
, "Bad command\n");