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git.ipfire.org Git - people/pmueller/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);
62 sprintf(str
, "/sbin/iptables -D IPSECINPUT -p udp -i %s --sport 500 --dport 500 -j ACCEPT >/dev/null 2>&1", interface
);
64 sprintf(str
, "/sbin/iptables -A IPSECINPUT -p udp -i %s --sport 500 --dport 500 -j ACCEPT", interface
);
67 if (! nat_traversal_port
)
70 sprintf(str
, "/sbin/iptables -D IPSECINPUT -p udp -i %s --dport %i -j ACCEPT >/dev/null 2>&1", interface
, nat_traversal_port
);
72 sprintf(str
, "/sbin/iptables -A IPSECINPUT -p udp -i %s --dport %i -j ACCEPT", interface
, nat_traversal_port
);
76 void ipsec_norules() {
77 /* clear input rules */
78 safe_system("/sbin/iptables -F IPSECINPUT");
79 safe_system("/sbin/iptables -F IPSECFORWARD");
80 safe_system("/sbin/iptables -F IPSECOUTPUT");
85 return values from the vpn config file or false if not 'on'
87 int decode_line (char *s
,
98 if (s
[strlen(s
) - 1] == '\n')
99 s
[strlen(s
) - 1] = '\0';
101 char *result
= strsep(&s
, ",");
105 if ((count
== 1) && strcmp(result
, "on") != 0)
106 return 0; // a disabled line
114 result
= strsep(&s
, ",");
117 // check other syntax
121 if (strspn(*name
, LETTERS_NUMBERS
) != strlen(*name
)) {
122 fprintf(stderr
, "Bad connection name: %s\n", *name
);
126 if (! (strcmp(*type
, "host") == 0 || strcmp(*type
, "net") == 0)) {
127 fprintf(stderr
, "Bad connection type: %s\n", *type
);
131 if (! (strcmp(*interface
, "RED") == 0 || strcmp(*interface
, "GREEN") == 0 ||
132 strcmp(*interface
, "ORANGE") == 0 || strcmp(*interface
, "BLUE") == 0)) {
133 fprintf(stderr
, "Bad interface name: %s\n", *interface
);
136 //it's a valid & active line
141 issue ipsec commmands to turn on connection 'name'
143 void turn_connection_on (char *name
, char *type
) {
144 char command
[STRING_SIZE
];
147 if (file
= fopen("/var/run/vpn-watch.pid", "r")) {
148 safe_system("kill -9 $(cat /var/run/vpn-watch.pid)");
149 safe_system("unlink /var/run/vpn-watch.pid");
152 safe_system("/etc/rc.d/init.d/ipsec restart >/dev/null");
153 safe_system("/usr/local/bin/vpn-watch &");
156 issue ipsec commmands to turn off connection 'name'
158 void turn_connection_off (char *name
) {
159 char command
[STRING_SIZE
];
160 memset(command
, 0, STRING_SIZE
);
161 snprintf(command
, STRING_SIZE
- 1,
162 "/usr/sbin/ipsec whack --delete --name %s >/dev/null", name
);
163 safe_system(command
);
164 safe_system("/usr/sbin/ipsec whack --rereadall >/dev/null");
168 int main(int argc
, char *argv
[]) {
170 char configtype
[STRING_SIZE
];
171 char redtype
[STRING_SIZE
] = "";
172 struct keyvalue
*kv
= NULL
;
184 if (strcmp(argv
[1], "I") == 0) {
185 safe_system("/usr/sbin/ipsec whack --status");
189 if (strcmp(argv
[1], "R") == 0) {
190 safe_system("/usr/sbin/ipsec whack --rereadall >/dev/null");
194 /* Get vpnwatch pid */
197 /* FIXME: workaround for pclose() issue - still no real idea why
198 * this is happening */
199 signal(SIGCHLD
, SIG_DFL
);
201 /* handle operations that doesn't need start the ipsec system */
203 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");
216 /* read vpn config */
218 if (!readkeyvalues(kv
, CONFIG_ROOT
"/vpn/settings"))
220 fprintf(stderr
, "Cannot read vpn settings\n");
224 /* check is the vpn system is enabled */
227 findkey(kv
, "ENABLED", s
);
229 if (strcmp (s
, "on") != 0)
233 /* read interface settings */
235 if (!readkeyvalues(kv
, CONFIG_ROOT
"/ethernet/settings"))
237 fprintf(stderr
, "Cannot read ethernet settings\n");
240 if (!findkey(kv
, "CONFIG_TYPE", configtype
))
242 fprintf(stderr
, "Cannot read CONFIG_TYPE\n");
245 findkey(kv
, "RED_TYPE", redtype
);
248 /* Loop through the config file to find physical interface that will accept IPSEC */
249 int enable_red
=0; // states 0: not used
250 int enable_green
=0; // 1: error condition
251 int enable_orange
=0; // 2: good
253 char if_red
[STRING_SIZE
] = "";
254 char if_green
[STRING_SIZE
] = "";
255 char if_orange
[STRING_SIZE
] = "";
256 char if_blue
[STRING_SIZE
] = "";
259 if (!(file
= fopen(CONFIG_ROOT
"/vpn/config", "r"))) {
260 fprintf(stderr
, "Couldn't open vpn settings file");
263 while (fgets(s
, STRING_SIZE
, file
) != NULL
) {
268 if (!decode_line(s
,&key
,&name
,&type
,&interface
))
270 /* search interface */
271 if (!enable_red
&& strcmp (interface
, "RED") == 0) {
272 // when RED is up, find interface name in special file
273 FILE *ifacefile
= NULL
;
274 if ((ifacefile
= fopen(CONFIG_ROOT
"/red/iface", "r"))) {
275 if (fgets(if_red
, STRING_SIZE
, ifacefile
)) {
276 if (if_red
[strlen(if_red
) - 1] == '\n')
277 if_red
[strlen(if_red
) - 1] = '\0';
281 if (VALID_DEVICE(if_red
))
282 enable_red
+=2; // present and running
286 if (!enable_green
&& strcmp (interface
, "GREEN") == 0) {
288 findkey(kv
, "GREEN_DEV", if_green
);
289 if (VALID_DEVICE(if_green
))
292 fprintf(stderr
, "IPSec enabled on green but green interface is invalid or not found\n");
295 if (!enable_orange
&& strcmp (interface
, "ORANGE") == 0) {
297 findkey(kv
, "ORANGE_DEV", if_orange
);
298 if (VALID_DEVICE(if_orange
))
301 fprintf(stderr
, "IPSec enabled on orange but orange interface is invalid or not found\n");
304 if (!enable_blue
&& strcmp (interface
, "BLUE") == 0) {
306 findkey(kv
, "BLUE_DEV", if_blue
);
307 if (VALID_DEVICE(if_blue
))
310 fprintf(stderr
, "IPSec enabled on blue but blue interface is invalid or not found\n");
317 // do nothing if something is in error condition
318 if ((enable_red
==1) || (enable_green
==1) || (enable_orange
==1) || (enable_blue
==1) )
321 // exit if nothing to do
322 if ( (enable_red
+enable_green
+enable_orange
+enable_blue
) == 0 )
326 // todo: read a nat_t indicator to allow or not openning UDP/4500
328 open_physical(if_red
, 4500);
331 open_physical(if_green
, 4500);
333 if (enable_orange
==2)
334 open_physical(if_orange
, 4500);
337 open_physical(if_blue
, 4500);
340 if ((argc
== 2) && strcmp(argv
[1], "S") == 0) {
344 // it is a selective start or stop
345 // second param is only a number 'key'
346 if ((argc
== 2) || strspn(argv
[2], NUMBERS
) != strlen(argv
[2])) {
347 fprintf(stderr
, "Bad arg\n");
352 // search the vpn pointed by 'key'
353 if (!(file
= fopen(CONFIG_ROOT
"/vpn/config", "r"))) {
354 fprintf(stderr
, "Couldn't open vpn settings file");
357 while (fgets(s
, STRING_SIZE
, file
) != NULL
) {
362 if (!decode_line(s
,&key
,&name
,&type
,&interface
))
365 // start/stop a vpn if belonging to specified interface
366 if (strcmp(argv
[1], interface
) == 0 ) {
367 if (strcmp(argv
[2], "0")==0)
368 turn_connection_off (name
);
370 turn_connection_on (name
, type
);
373 // is it the 'key' requested ?
374 if (strcmp(argv
[2], key
) != 0)
376 // Start or Delete this Connection
377 if (strcmp(argv
[1], "S") == 0)
378 turn_connection_on (name
, type
);
380 if (strcmp(argv
[1], "D") == 0)
381 turn_connection_off (name
);
383 fprintf(stderr
, "Bad command\n");