8 #include <netinet/in.h>
12 #include "libsmooth.h"
17 struct keyvalue
*kv
= NULL
;
18 FILE *ifacefile
= NULL
;
20 char redif
[STRING_SIZE
];
21 char blueif
[STRING_SIZE
];
22 char orangeif
[STRING_SIZE
];
23 char enablered
[STRING_SIZE
] = "off";
24 char enableblue
[STRING_SIZE
] = "off";
25 char enableorange
[STRING_SIZE
] = "off";
28 char OVPNRED
[STRING_SIZE
] = "OVPN";
29 char OVPNBLUE
[STRING_SIZE
] = "OVPN_BLUE_";
30 char OVPNORANGE
[STRING_SIZE
] = "OVPN_ORANGE_";
31 char OVPNBLOCK
[STRING_SIZE
] = "OVPNBLOCK";
32 char OVPNNAT
[STRING_SIZE
] = "OVPNNAT";
33 char WRAPPERVERSION
[STRING_SIZE
] = "ipfire-2.2.3";
35 struct connection_struct
{
36 char name
[STRING_SIZE
];
37 char type
[STRING_SIZE
];
38 char proto
[STRING_SIZE
];
39 char status
[STRING_SIZE
];
40 char local_subnet
[STRING_SIZE
];
41 char transfer_subnet
[STRING_SIZE
];
42 char role
[STRING_SIZE
];
44 struct connection_struct
*next
;
47 typedef struct connection_struct connection
;
49 void exithandler(void)
60 printf("Wrapper for OpenVPN %s-debug\n", WRAPPERVERSION
);
62 printf("Wrapper for OpenVPN %s\n", WRAPPERVERSION
);
64 printf("openvpnctrl <option>\n");
65 printf(" Valid options are:\n");
66 printf(" -s --start\n");
67 printf(" starts OpenVPN (implicitly creates chains and firewall rules)\n");
68 printf(" -k --kill\n");
69 printf(" kills/stops OpenVPN\n");
70 printf(" -r --restart\n");
71 printf(" restarts OpenVPN (implicitly creates chains and firewall rules)\n");
72 printf(" -sn2n --start-net-2-net\n");
73 printf(" starts all net2net connections\n");
74 printf(" you may pass a connection name to the switch to only start a specific one\n");
75 printf(" -kn2n --kill-net-2-net\n");
76 printf(" kills all net2net connections\n");
77 printf(" you may pass a connection name to the switch to only start a specific one\n");
78 printf(" -d --display\n");
79 printf(" displays OpenVPN status to syslog\n");
80 printf(" -fwr --firewall-rules\n");
81 printf(" removes current OpenVPN chains and rules and resets them according to the config\n");
82 printf(" -sdo --start-daemon-only\n");
83 printf(" starts OpenVPN daemon only\n");
84 printf(" -ccr --create-chains-and-rules\n");
85 printf(" creates chains and rules for OpenVPN\n");
86 printf(" -dcr --delete-chains-and-rules\n");
87 printf(" removes all chains for OpenVPN\n");
91 connection
*getConnections() {
94 if (!(fp
= fopen(CONFIG_ROOT
"/ovpn/ovpnconfig", "r"))) {
95 fprintf(stderr
, "Could not open openvpn n2n configuration file.\n");
99 char line
[STRING_SIZE
] = "";
100 char result
[STRING_SIZE
] = "";
103 connection
*conn_first
= NULL
;
104 connection
*conn_last
= NULL
;
105 connection
*conn_curr
;
107 while ((fgets(line
, STRING_SIZE
, fp
) != NULL
)) {
108 if (line
[strlen(line
) - 1] == '\n')
109 line
[strlen(line
) - 1] = '\0';
111 conn_curr
= (connection
*)malloc(sizeof(connection
));
112 memset(conn_curr
, 0, sizeof(connection
));
114 if (conn_first
== NULL
) {
115 conn_first
= conn_curr
;
117 conn_last
->next
= conn_curr
;
119 conn_last
= conn_curr
;
122 char *lineptr
= &line
;
124 if (*lineptr
== NULL
)
128 while (*lineptr
!= NULL
) {
129 if (*lineptr
== ',') {
133 *resultptr
++ = *lineptr
++;
138 strcpy(conn_curr
->status
, result
);
139 } else if (count
== 2) {
140 strcpy(conn_curr
->name
, result
);
141 } else if (count
== 4) {
142 strcpy(conn_curr
->type
, result
);
143 } else if (count
== 7) {
144 strcpy(conn_curr
->role
, result
);
145 } else if (count
== 9) {
146 strcpy(conn_curr
->local_subnet
, result
);
147 } else if (count
== 28) {
148 strcpy(conn_curr
->transfer_subnet
, result
);
149 } else if (count
== 29) {
150 strcpy(conn_curr
->proto
, result
);
151 } else if (count
== 30) {
152 conn_curr
->port
= atoi(result
);
164 int readPidFile(const char *pidfile
) {
165 FILE *fp
= fopen(pidfile
, "r");
171 fscanf(fp
, "%d", &pid
);
177 void ovpnInit(void) {
178 // Read OpenVPN configuration
179 kv
= initkeyvalues();
180 if (!readkeyvalues(kv
, CONFIG_ROOT
"/ovpn/settings")) {
181 fprintf(stderr
, "Cannot read ovpn settings\n");
185 if (!findkey(kv
, "ENABLED", enablered
)) {
189 if (!findkey(kv
, "ENABLED_BLUE", enableblue
)){
193 if (!findkey(kv
, "ENABLED_ORANGE", enableorange
)){
198 // read interface settings
200 // details for the red int
201 memset(redif
, 0, STRING_SIZE
);
202 if ((ifacefile
= fopen(CONFIG_ROOT
"/red/iface", "r")))
204 if (fgets(redif
, STRING_SIZE
, ifacefile
))
206 if (redif
[strlen(redif
) - 1] == '\n')
207 redif
[strlen(redif
) - 1] = '\0';
212 if (!VALID_DEVICE(redif
))
214 memset(redif
, 0, STRING_SIZE
);
219 if (!readkeyvalues(kv
, CONFIG_ROOT
"/ethernet/settings")) {
220 fprintf(stderr
, "Cannot read ethernet settings\n");
224 if (strcmp(enableblue
, "on") == 0) {
225 if (!findkey(kv
, "BLUE_DEV", blueif
)) {
230 if (strcmp(enableorange
, "on") == 0) {
231 if (!findkey(kv
, "ORANGE_DEV", orangeif
)) {
238 void executeCommand(char *command
) {
240 printf(strncat(command
, "\n", 2));
242 safe_system(strncat(command
, " >/dev/null 2>&1", 17));
245 void setChainRules(char *chain
, char *interface
, char *protocol
, char *port
)
247 char str
[STRING_SIZE
];
249 sprintf(str
, "/sbin/iptables -A %sINPUT -i %s -p %s --dport %s -j ACCEPT", chain
, interface
, protocol
, port
);
253 void flushChain(char *chain
) {
254 char str
[STRING_SIZE
];
256 sprintf(str
, "/sbin/iptables -F %s", chain
);
260 void flushChainNAT(char *chain
) {
261 char str
[STRING_SIZE
];
263 sprintf(str
, "/sbin/iptables -t nat -F %s", chain
);
267 void flushChainINPUT(char *chain
) {
268 char str
[STRING_SIZE
];
270 snprintf(str
, STRING_SIZE
, "%sINPUT", chain
);
274 void deleteChainReference(char *chain
) {
275 char str
[STRING_SIZE
];
277 sprintf(str
, "/sbin/iptables -D INPUT -j %sINPUT", chain
);
281 void deleteChain(char *chain
) {
282 char str
[STRING_SIZE
];
284 sprintf(str
, "/sbin/iptables -X %sINPUT", chain
);
288 void deleteAllChains(void) {
289 // not an elegant solution, but to avoid timing problems with undeleted chain references
290 deleteChainReference(OVPNRED
);
291 deleteChainReference(OVPNBLUE
);
292 deleteChainReference(OVPNORANGE
);
293 flushChainINPUT(OVPNRED
);
294 flushChainINPUT(OVPNBLUE
);
295 flushChainINPUT(OVPNORANGE
);
296 deleteChain(OVPNRED
);
297 deleteChain(OVPNBLUE
);
298 deleteChain(OVPNORANGE
);
300 // Only flush chains that are created by the firewall
301 flushChain(OVPNBLOCK
);
302 flushChainNAT(OVPNNAT
);
305 void createChainReference(char *chain
) {
306 char str
[STRING_SIZE
];
307 sprintf(str
, "/sbin/iptables -I INPUT %s -j %sINPUT", "14", chain
);
311 void createChain(char *chain
) {
312 char str
[STRING_SIZE
];
313 sprintf(str
, "/sbin/iptables -N %sINPUT", chain
);
317 void createAllChains(void) {
318 // create chain and chain references
319 if (!strcmp(enableorange
, "on")) {
320 if (strlen(orangeif
) > 0) {
321 createChain(OVPNORANGE
);
322 createChainReference(OVPNORANGE
);
324 fprintf(stderr
, "OpenVPN enabled on orange but no orange interface found\n");
329 if (!strcmp(enableblue
, "on")) {
330 if (strlen(blueif
) > 0) {
331 createChain(OVPNBLUE
);
332 createChainReference(OVPNBLUE
);
334 fprintf(stderr
, "OpenVPN enabled on blue but no blue interface found\n");
339 if (!strcmp(enablered
, "on")) {
340 if (strlen(redif
) > 0) {
341 createChain(OVPNRED
);
342 createChainReference(OVPNRED
);
344 fprintf(stderr
, "OpenVPN enabled on red but no red interface found\n");
350 char* calcTransferNetAddress(const connection
* conn
) {
351 char *subnetmask
= strdup(conn
->transfer_subnet
);
352 char *address
= strsep(&subnetmask
, "/");
354 if ((address
== NULL
) || (subnetmask
== NULL
)) {
358 in_addr_t _address
= inet_addr(address
);
359 in_addr_t _subnetmask
= inet_addr(subnetmask
);
360 _address
&= _subnetmask
;
362 if (strcmp(conn
->role
, "server") == 0) {
364 } else if (strcmp(conn
->role
, "client") == 0) {
370 struct in_addr address_info
;
371 address_info
.s_addr
= _address
;
373 return inet_ntoa(address_info
);
376 fprintf(stderr
, "Could not determine transfer net address: %s\n", conn
->name
);
382 char* getLocalSubnetAddress(const connection
* conn
) {
383 kv
= initkeyvalues();
384 if (!readkeyvalues(kv
, CONFIG_ROOT
"/ethernet/settings")) {
385 fprintf(stderr
, "Cannot read ethernet settings\n");
389 const char *zones
[] = {"GREEN", "BLUE", "ORANGE", NULL
};
392 // Get net address of the local openvpn subnet.
393 char *subnetmask
= strdup(conn
->local_subnet
);
394 char *address
= strsep(&subnetmask
, "/");
396 if ((address
== NULL
) || (subnetmask
== NULL
)) {
400 in_addr_t _address
= inet_addr(address
);
401 in_addr_t _subnetmask
= inet_addr(subnetmask
);
403 in_addr_t _netaddr
= (_address
& _subnetmask
);
404 in_addr_t _broadcast
= (_address
| ~_subnetmask
);
406 char zone_address_key
[STRING_SIZE
];
407 char zone_address
[STRING_SIZE
];
413 snprintf(zone_address_key
, STRING_SIZE
, "%s_ADDRESS", zone
);
415 if (!findkey(kv
, zone_address_key
, zone_address
))
418 zone_addr
= inet_addr(zone_address
);
419 if ((zone_addr
> _netaddr
) && (zone_addr
< _broadcast
)) {
422 return strdup(zone_address
);
427 fprintf(stderr
, "Could not determine local subnet address: %s\n", conn
->name
);
433 void setFirewallRules(void) {
434 char protocol
[STRING_SIZE
] = "";
435 char dport
[STRING_SIZE
] = "";
436 char dovpnip
[STRING_SIZE
] = "";
438 kv
= initkeyvalues();
439 if (!readkeyvalues(kv
, CONFIG_ROOT
"/ovpn/settings"))
441 fprintf(stderr
, "Cannot read ovpn settings\n");
445 /* we got one device, so lets proceed further */
446 if (!findkey(kv
, "DDEST_PORT", dport
)){
447 fprintf(stderr
, "Cannot read DDEST_PORT\n");
451 if (!findkey(kv
, "DPROTOCOL", protocol
)){
452 fprintf(stderr
, "Cannot read DPROTOCOL\n");
456 if (!findkey(kv
, "VPN_IP", dovpnip
)){
457 fprintf(stderr
, "Cannot read VPN_IP\n");
462 flushChainINPUT(OVPNRED
);
463 flushChainINPUT(OVPNBLUE
);
464 flushChainINPUT(OVPNORANGE
);
465 flushChain(OVPNBLOCK
);
466 flushChainNAT(OVPNNAT
);
468 // set firewall rules
469 if (!strcmp(enablered
, "on") && strlen(redif
))
470 setChainRules(OVPNRED
, redif
, protocol
, dport
);
471 if (!strcmp(enableblue
, "on") && strlen(blueif
))
472 setChainRules(OVPNBLUE
, blueif
, protocol
, dport
);
473 if (!strcmp(enableorange
, "on") && strlen(orangeif
))
474 setChainRules(OVPNORANGE
, orangeif
, protocol
, dport
);
476 // read connection configuration
477 connection
*conn
= getConnections();
479 // set firewall rules for n2n connections
480 char command
[STRING_SIZE
];
481 char *local_subnet_address
= NULL
;
482 char *transfer_subnet_address
= NULL
;
483 while (conn
!= NULL
) {
484 if (strcmp(conn
->type
, "net") == 0) {
485 sprintf(command
, "/sbin/iptables -A %sINPUT -i %s -p %s --dport %d -j ACCEPT",
486 OVPNRED
, redif
, conn
->proto
, conn
->port
);
487 executeCommand(command
);
489 /* Block all communication from the transfer nets. */
490 snprintf(command
, STRING_SIZE
, "/sbin/iptables -A %s -s %s -j DROP",
491 OVPNBLOCK
, conn
->transfer_subnet
);
492 executeCommand(command
);
494 local_subnet_address
= getLocalSubnetAddress(conn
);
495 transfer_subnet_address
= calcTransferNetAddress(conn
);
497 if ((local_subnet_address
) && (transfer_subnet_address
)) {
498 snprintf(command
, STRING_SIZE
, "/sbin/iptables -t nat -A %s -s %s -j SNAT --to-source %s",
499 OVPNNAT
, transfer_subnet_address
, local_subnet_address
);
500 executeCommand(command
);
508 void stopDaemon(void) {
509 char command
[STRING_SIZE
];
511 int pid
= readPidFile("/var/run/openvpn.pid");
516 fprintf(stderr
, "Killing PID %d.\n", pid
);
519 snprintf(command
, STRING_SIZE
- 1, "/bin/rm -f /var/run/openvpn.pid");
520 executeCommand(command
);
523 void startDaemon(void) {
524 char command
[STRING_SIZE
];
526 if (!((strcmp(enablered
, "on") == 0) || (strcmp(enableblue
, "on") == 0) || (strcmp(enableorange
, "on") == 0))) {
527 fprintf(stderr
, "OpenVPN is not enabled on any interface\n");
530 snprintf(command
, STRING_SIZE
-1, "/sbin/modprobe tun");
531 executeCommand(command
);
532 snprintf(command
, STRING_SIZE
-1, "/usr/sbin/openvpn --config /var/ipfire/ovpn/server.conf");
533 executeCommand(command
);
537 int startNet2Net(char *name
) {
538 connection
*conn
= NULL
;
539 connection
*conn_iter
;
541 conn_iter
= getConnections();
544 if ((strcmp(conn_iter
->type
, "net") == 0) && (strcmp(conn_iter
->name
, name
) == 0)) {
548 conn_iter
= conn_iter
->next
;
552 fprintf(stderr
, "Connection not found.\n");
556 if (strcmp(conn
->status
, "on") != 0) {
557 fprintf(stderr
, "Connection '%s' is not enabled.\n", conn
->name
);
561 fprintf(stderr
, "Starting connection %s...\n", conn
->name
);
563 char configfile
[STRING_SIZE
];
564 snprintf(configfile
, STRING_SIZE
- 1, CONFIG_ROOT
"/ovpn/n2nconf/%s/%s.conf",
565 conn
->name
, conn
->name
);
567 FILE *fp
= fopen(configfile
, "r");
569 fprintf(stderr
, "Could not find configuration file for connection '%s' at '%s'.\n",
570 conn
->name
, configfile
);
575 // Make sure all firewall rules are up to date.
578 char command
[STRING_SIZE
];
579 snprintf(command
, STRING_SIZE
-1, "/sbin/modprobe tun");
580 executeCommand(command
);
581 snprintf(command
, STRING_SIZE
-1, "/usr/sbin/openvpn --config %s", configfile
);
582 executeCommand(command
);
587 int killNet2Net(char *name
) {
588 connection
*conn
= NULL
;
589 connection
*conn_iter
;
591 conn_iter
= getConnections();
594 if (strcmp(conn_iter
->name
, name
) == 0) {
598 conn_iter
= conn_iter
->next
;
602 fprintf(stderr
, "Connection not found.\n");
606 char pidfile
[STRING_SIZE
];
607 snprintf(pidfile
, STRING_SIZE
- 1, "/var/run/%sn2n.pid", conn
->name
);
609 int pid
= readPidFile(pidfile
);
611 fprintf(stderr
, "Could not read pid file of connection %s.", conn
->name
);
615 fprintf(stderr
, "Killing connection %s (PID %d)...\n", conn
->name
, pid
);
618 char command
[STRING_SIZE
];
619 snprintf(command
, STRING_SIZE
- 1, "/bin/rm -f %s", pidfile
);
620 executeCommand(command
);
625 void startAllNet2Net() {
626 int exitcode
= 0, _exitcode
= 0;
628 connection
*conn
= getConnections();
631 /* Skip all connections that are not of type "net" or disabled. */
632 if ((strcmp(conn
->type
, "net") != 0) || (strcmp(conn
->status
, "on") != 0)) {
637 _exitcode
= startNet2Net(conn
->name
);
640 if (_exitcode
> exitcode
) {
641 exitcode
= _exitcode
;
648 void killAllNet2Net() {
649 int exitcode
= 0, _exitcode
= 0;
651 connection
*conn
= getConnections();
654 /* Skip all connections that are not of type "net". */
655 if (strcmp(conn
->type
, "net") != 0) {
660 _exitcode
= killNet2Net(conn
->name
);
663 if (_exitcode
> exitcode
) {
664 exitcode
= _exitcode
;
671 void displayopenvpn(void) {
672 char command
[STRING_SIZE
];
674 snprintf(command
, STRING_SIZE
- 1, "/bin/killall -sSIGUSR2 openvpn");
675 executeCommand(command
);
678 int main(int argc
, char *argv
[]) {
687 if( (strcmp(argv
[1], "-sn2n") == 0) || (strcmp(argv
[1], "--start-net-2-net") == 0) ) {
688 startNet2Net(argv
[2]);
691 else if( (strcmp(argv
[1], "-kn2n") == 0) || (strcmp(argv
[1], "--kill-net-2-net") == 0) ) {
692 killNet2Net(argv
[2]);
700 if( (strcmp(argv
[1], "-k") == 0) || (strcmp(argv
[1], "--kill") == 0) ) {
704 else if( (strcmp(argv
[1], "-d") == 0) || (strcmp(argv
[1], "--display") == 0) ) {
708 else if( (strcmp(argv
[1], "-dcr") == 0) || (strcmp(argv
[1], "--delete-chains-and-rules") == 0) ) {
715 if( (strcmp(argv
[1], "-s") == 0) || (strcmp(argv
[1], "--start") == 0) ) {
722 else if( (strcmp(argv
[1], "-sn2n") == 0) || (strcmp(argv
[1], "--start-net-2-net") == 0) ) {
726 else if( (strcmp(argv
[1], "-kn2n") == 0) || (strcmp(argv
[1], "--kill-net-2-net") == 0) ) {
730 else if( (strcmp(argv
[1], "-sdo") == 0) || (strcmp(argv
[1], "--start-daemon-only") == 0) ) {
734 else if( (strcmp(argv
[1], "-r") == 0) || (strcmp(argv
[1], "--restart") == 0) ) {
742 else if( (strcmp(argv
[1], "-fwr") == 0) || (strcmp(argv
[1], "--firewall-rules") == 0) ) {
748 else if( (strcmp(argv
[1], "-ccr") == 0) || (strcmp(argv
[1], "--create-chains-and-rules") == 0) ) {