[people/teissler/ipfire-2.x.git] / src / misc-progs / wirelessctrl.c

/* IPCop helper program - wirelessctrl
 *
 * This program is distributed under the terms of the GNU General Public
 * Licence.  See the file COPYING for details.
 *
 * (c) Alan Hourihane, 2003
 *
 */

#include "libsmooth.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <signal.h>
#include <errno.h>

#include "setuid.h"
#include "netutil.h"

FILE *fd = NULL;
char blue_dev[STRING_SIZE] = "";
char command[STRING_SIZE];

void exithandler(void) {
	/* added comment mark to the drop rules to be able to collect the bytes by the collectd */
	if (strlen(blue_dev) > 0) {
		snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSINPUT -i %s -j DROP -m comment --comment 'DROP_Wirelessinput'", blue_dev);
		safe_system(command);
		snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSFORWARD -i %s -j DROP -m comment --comment 'DROP_Wirelessforward'", blue_dev);
		safe_system(command);
	}

	if (fd)
		fclose(fd);
}

int main(void) {
	char green_dev[STRING_SIZE] = "";
	char buffer[STRING_SIZE];
	char *index, *ipaddress, *macaddress, *enabled;
	struct keyvalue *kv = NULL;

	if (!(initsetuid()))
		exit(1);

	/* flush wireless iptables */
	safe_system("/sbin/iptables --wait -F WIRELESSINPUT > /dev/null 2> /dev/null");
	safe_system("/sbin/iptables --wait -F WIRELESSFORWARD > /dev/null 2> /dev/null");

	memset(buffer, 0, STRING_SIZE);

	/* Init the keyvalue structure */
	kv=initkeyvalues();

	/* Read in the current values */
	if (!readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings")) {
		fprintf(stderr, "Cannot read ethernet settings\n");
		exit(1);
	}

	/* Read in the firewall values */
	if (!readkeyvalues(kv, CONFIG_ROOT "/optionsfw/settings")) {
		fprintf(stderr, "Cannot read optionsfw settings\n");
		exit(1);
	}

	/* Get the GREEN interface details */
	if (findkey(kv, "GREEN_DEV", green_dev) > 0) {
		if (!VALID_DEVICE(green_dev)) {
			fprintf(stderr, "Bad GREEN_DEV: %s\n", green_dev);
			exit(1);
		}
	}

	/* Get the BLUE interface details */
	if (findkey(kv, "BLUE_DEV", blue_dev) > 0) {
		if ((strlen(blue_dev) > 0) && !VALID_DEVICE(blue_dev)) {
			fprintf(stderr, "Bad BLUE_DEV: %s\n", blue_dev);
			exit(1);
		}
	}

	if (strlen(blue_dev) == 0) {
		exit(0);
	}

	if ((fd = fopen(CONFIG_ROOT "/wireless/nodrop", "r")))
		return 0;

	/* register exit handler to ensure the block rule is always present */
	atexit(exithandler);

	if (!(fd = fopen(CONFIG_ROOT "/wireless/config", "r"))) {
		exit(0);
	}

	/* restrict blue access tp the proxy port */
	if (findkey(kv, "DROPPROXY", buffer) && strcmp(buffer, "on") == 0) {
		/* Read the proxy values */
		if (!readkeyvalues(kv, CONFIG_ROOT "/proxy/settings") || !(findkey(kv, "PROXY_PORT", buffer))) {
			fprintf(stderr, "Cannot read proxy settings\n");
			exit(1);
		}

		snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSFORWARD -i %s -p tcp  ! --dport %s -j DROP -m comment --comment 'DROP_Wirelessforward'", blue_dev, buffer);
		safe_system(command);
		snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSINPUT -i %s -p tcp  ! --dport %s -j DROP -m comment --comment 'DROP_Wirelessinput'", blue_dev, buffer);
		safe_system(command);
	}

	/* not allow blue to acces a samba server running on local fire*/
	if (findkey(kv, "DROPSAMBA", buffer) && strcmp(buffer, "on") == 0) {
		snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSFORWARD -i %s -p tcp -m multiport --ports 135,137,138,139,445,1025 -j DROP -m comment --comment 'DROP_Wirelessforward'", blue_dev);
		safe_system(command);
		snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSINPUT -i %s -p tcp -m multiport --ports 135,137,138,139,445,1025 -j DROP -m comment --comment 'DROP_Wirelessinput'", blue_dev);
		safe_system(command);
		snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSFORWARD -i %s -p udp -m multiport --ports 135,137,138,139,445,1025 -j DROP -m comment --comment 'DROP_Wirelessforward'", blue_dev);
		safe_system(command);
		snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSINPUT -i %s -p udp -m multiport --ports 135,137,138,139,445,1025 -j DROP -m comment --comment 'DROP_Wirelessinput'", blue_dev);
		safe_system(command);
	}

	while (fgets(buffer, STRING_SIZE, fd)) {
		buffer[strlen(buffer) - 1] = 0;

		index = strtok(buffer, ",");
		ipaddress = strtok(NULL, ",");
		macaddress = strtok(NULL, ",");
		enabled = strtok(NULL, ",");

		if (strcmp(enabled, "on") == 0) {
			/* both specified, added security */
			if ((strlen(macaddress) == 17) && (VALID_IP_AND_MASK(ipaddress))) {
				snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSINPUT -m mac --mac-source %s -s %s -i %s -j ACCEPT", macaddress, ipaddress, blue_dev);
				safe_system(command);
				snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSFORWARD -m mac --mac-source %s -s %s -i %s -j RETURN", macaddress, ipaddress, blue_dev);
				safe_system(command);
			} else {
				/* correctly formed mac address is 17 chars */
				if (strlen(macaddress) == 17) {
					snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSINPUT -m mac --mac-source %s -i %s -j ACCEPT", macaddress, blue_dev);
					safe_system(command);
					snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSFORWARD -m mac --mac-source %s -i %s -j RETURN", macaddress, blue_dev);
					safe_system(command);
				}

				if (VALID_IP_AND_MASK(ipaddress)) {
					snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSINPUT -s %s -i %s -j ACCEPT", ipaddress, blue_dev);
					safe_system(command);
					snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSFORWARD -s %s -i %s -j RETURN", ipaddress, blue_dev);
					safe_system(command);
				}
			}
		}
	}

	/* with this rule you can disable the logging of the dropped wireless input packets*/
	if (findkey(kv, "DROPWIRELESSINPUT", buffer) && strcmp(buffer, "on") == 0) {
		snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSINPUT -i %s -j LOG --log-prefix 'DROP_Wirelessinput'", blue_dev);
		safe_system(command);
	}

	/* with this rule you can disable the logging of the dropped wireless forward packets*/
	if (findkey(kv, "DROPWIRELESSFORWARD", buffer) && strcmp(buffer, "on") == 0) {
		snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSFORWARD -i %s -j LOG --log-prefix 'DROP_Wirelessforward'", blue_dev);
		safe_system(command);
	}

	return 0;
}
Commit	Line	Data
900832fa CS	1	/* IPCop helper program - wirelessctrl
	2	*
	3	* This program is distributed under the terms of the GNU General Public
	4	* Licence. See the file COPYING for details.
	5	*
	6	* (c) Alan Hourihane, 2003
0a56f193	7	*
900832fa CS	8	*/
	9
	10	#include "libsmooth.h"
	11	#include <stdio.h>
	12	#include <stdlib.h>
	13	#include <unistd.h>
	14	#include <fcntl.h>
	15	#include <string.h>
	16	#include <sys/types.h>
	17	#include <sys/stat.h>
	18	#include <signal.h>
42dc0090	19	#include <errno.h>
900832fa	20
52e54c1c MT	21	#include "setuid.h"
	22	#include "netutil.h"
	23
900832fa CS	24	FILE *fd = NULL;
	25	char blue_dev[STRING_SIZE] = "";
	26	char command[STRING_SIZE];
	27
d69bf619 MT	28	void exithandler(void) {
	29	/* added comment mark to the drop rules to be able to collect the bytes by the collectd */
	30	if (strlen(blue_dev) > 0) {
7506baa2	31	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSINPUT -i %s -j DROP -m comment --comment 'DROP_Wirelessinput'", blue_dev);
d69bf619	32	safe_system(command);
7506baa2	33	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSFORWARD -i %s -j DROP -m comment --comment 'DROP_Wirelessforward'", blue_dev);
d69bf619 MT	34	safe_system(command);
	35	}
	36
	37	if (fd)
	38	fclose(fd);
0a56f193 CS	39	}
0a56f193 CS	40
d69bf619 MT	41	int main(void) {
	42	char green_dev[STRING_SIZE] = "";
	43	char buffer[STRING_SIZE];
	44	char index, ipaddress, macaddress, enabled;
	45	struct keyvalue *kv = NULL;
	46
	47	if (!(initsetuid()))
	48	exit(1);
	49
	50	/* flush wireless iptables */
7506baa2 MT	51	safe_system("/sbin/iptables --wait -F WIRELESSINPUT > /dev/null 2> /dev/null");
7506baa2 MT	52	safe_system("/sbin/iptables --wait -F WIRELESSFORWARD > /dev/null 2> /dev/null");
d69bf619 MT	53
	54	memset(buffer, 0, STRING_SIZE);
	55
	56	/* Init the keyvalue structure */
	57	kv=initkeyvalues();
	58
	59	/* Read in the current values */
	60	if (!readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings")) {
	61	fprintf(stderr, "Cannot read ethernet settings\n");
	62	exit(1);
	63	}
	64
	65	/* Read in the firewall values */
	66	if (!readkeyvalues(kv, CONFIG_ROOT "/optionsfw/settings")) {
	67	fprintf(stderr, "Cannot read optionsfw settings\n");
	68	exit(1);
	69	}
	70
	71	/* Get the GREEN interface details */
27ba58fb MT	72	if (findkey(kv, "GREEN_DEV", green_dev) > 0) {
	73	if (!VALID_DEVICE(green_dev)) {
	74	fprintf(stderr, "Bad GREEN_DEV: %s\n", green_dev);
	75	exit(1);
	76	}
d69bf619 MT	77	}
	78
	79	/* Get the BLUE interface details */
27ba58fb MT	80	if (findkey(kv, "BLUE_DEV", blue_dev) > 0) {
	81	if ((strlen(blue_dev) > 0) && !VALID_DEVICE(blue_dev)) {
	82	fprintf(stderr, "Bad BLUE_DEV: %s\n", blue_dev);
	83	exit(1);
	84	}
d69bf619 MT	85	}
d69bf619 MT	86
27ba58fb	87	if (strlen(blue_dev) == 0) {
d69bf619 MT	88	exit(0);
	89	}
	90
	91	if ((fd = fopen(CONFIG_ROOT "/wireless/nodrop", "r")))
	92	return 0;
	93
	94	/* register exit handler to ensure the block rule is always present */
	95	atexit(exithandler);
	96
	97	if (!(fd = fopen(CONFIG_ROOT "/wireless/config", "r"))) {
	98	exit(0);
	99	}
	100
	101	/* restrict blue access tp the proxy port */
ec36876e	102	if (findkey(kv, "DROPPROXY", buffer) && strcmp(buffer, "on") == 0) {
d69bf619 MT	103	/* Read the proxy values */
	104	if (!readkeyvalues(kv, CONFIG_ROOT "/proxy/settings") \|\| !(findkey(kv, "PROXY_PORT", buffer))) {
	105	fprintf(stderr, "Cannot read proxy settings\n");
	106	exit(1);
	107	}
	108
7506baa2	109	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSFORWARD -i %s -p tcp ! --dport %s -j DROP -m comment --comment 'DROP_Wirelessforward'", blue_dev, buffer);
d69bf619	110	safe_system(command);
7506baa2	111	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSINPUT -i %s -p tcp ! --dport %s -j DROP -m comment --comment 'DROP_Wirelessinput'", blue_dev, buffer);
d69bf619 MT	112	safe_system(command);
	113	}
	114
	115	/* not allow blue to acces a samba server running on local fire*/
ec36876e	116	if (findkey(kv, "DROPSAMBA", buffer) && strcmp(buffer, "on") == 0) {
7506baa2	117	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSFORWARD -i %s -p tcp -m multiport --ports 135,137,138,139,445,1025 -j DROP -m comment --comment 'DROP_Wirelessforward'", blue_dev);
d69bf619	118	safe_system(command);
7506baa2	119	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSINPUT -i %s -p tcp -m multiport --ports 135,137,138,139,445,1025 -j DROP -m comment --comment 'DROP_Wirelessinput'", blue_dev);
d69bf619	120	safe_system(command);
7506baa2	121	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSFORWARD -i %s -p udp -m multiport --ports 135,137,138,139,445,1025 -j DROP -m comment --comment 'DROP_Wirelessforward'", blue_dev);
d69bf619	122	safe_system(command);
7506baa2	123	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSINPUT -i %s -p udp -m multiport --ports 135,137,138,139,445,1025 -j DROP -m comment --comment 'DROP_Wirelessinput'", blue_dev);
d69bf619 MT	124	safe_system(command);
	125	}
	126
	127	while (fgets(buffer, STRING_SIZE, fd)) {
	128	buffer[strlen(buffer) - 1] = 0;
	129
	130	index = strtok(buffer, ",");
	131	ipaddress = strtok(NULL, ",");
	132	macaddress = strtok(NULL, ",");
	133	enabled = strtok(NULL, ",");
	134
f7bb0031	135	if (strcmp(enabled, "on") == 0) {
d69bf619 MT	136	/* both specified, added security */
d69bf619 MT	137	if ((strlen(macaddress) == 17) && (VALID_IP_AND_MASK(ipaddress))) {
7506baa2	138	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSINPUT -m mac --mac-source %s -s %s -i %s -j ACCEPT", macaddress, ipaddress, blue_dev);
d69bf619	139	safe_system(command);
7506baa2	140	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSFORWARD -m mac --mac-source %s -s %s -i %s -j RETURN", macaddress, ipaddress, blue_dev);
d69bf619 MT	141	safe_system(command);
	142	} else {
	143	/* correctly formed mac address is 17 chars */
	144	if (strlen(macaddress) == 17) {
7506baa2	145	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSINPUT -m mac --mac-source %s -i %s -j ACCEPT", macaddress, blue_dev);
d69bf619	146	safe_system(command);
7506baa2	147	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSFORWARD -m mac --mac-source %s -i %s -j RETURN", macaddress, blue_dev);
d69bf619	148	safe_system(command);
0aaef8e9 CS	149	}
0aaef8e9 CS	150
d69bf619	151	if (VALID_IP_AND_MASK(ipaddress)) {
7506baa2	152	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSINPUT -s %s -i %s -j ACCEPT", ipaddress, blue_dev);
d69bf619	153	safe_system(command);
7506baa2	154	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSFORWARD -s %s -i %s -j RETURN", ipaddress, blue_dev);
d69bf619	155	safe_system(command);
0aaef8e9	156	}
d69bf619 MT	157	}
	158	}
	159	}
	160
	161	/* with this rule you can disable the logging of the dropped wireless input packets*/
ec36876e	162	if (findkey(kv, "DROPWIRELESSINPUT", buffer) && strcmp(buffer, "on") == 0) {
7506baa2	163	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSINPUT -i %s -j LOG --log-prefix 'DROP_Wirelessinput'", blue_dev);
d69bf619 MT	164	safe_system(command);
	165	}
	166
	167	/* with this rule you can disable the logging of the dropped wireless forward packets*/
ec36876e	168	if (findkey(kv, "DROPWIRELESSFORWARD", buffer) && strcmp(buffer, "on") == 0) {
7506baa2	169	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSFORWARD -i %s -j LOG --log-prefix 'DROP_Wirelessforward'", blue_dev);
d69bf619 MT	170	safe_system(command);
	171	}
	172
	173	return 0;
900832fa	174	}