[people/pmueller/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 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 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 RETURN", 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 RETURN", 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 RETURN", 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	41	int main(void) {
d69bf619 MT	42	char buffer[STRING_SIZE];
	43	char index, ipaddress, macaddress, enabled;
	44	struct keyvalue *kv = NULL;
	45
	46	if (!(initsetuid()))
	47	exit(1);
	48
	49	/* flush wireless iptables */
7506baa2 MT	50	safe_system("/sbin/iptables --wait -F WIRELESSINPUT > /dev/null 2> /dev/null");
7506baa2 MT	51	safe_system("/sbin/iptables --wait -F WIRELESSFORWARD > /dev/null 2> /dev/null");
d69bf619 MT	52
	53	memset(buffer, 0, STRING_SIZE);
	54
	55	/* Init the keyvalue structure */
	56	kv=initkeyvalues();
	57
	58	/* Read in the current values */
	59	if (!readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings")) {
	60	fprintf(stderr, "Cannot read ethernet settings\n");
	61	exit(1);
	62	}
	63
	64	/* Read in the firewall values */
	65	if (!readkeyvalues(kv, CONFIG_ROOT "/optionsfw/settings")) {
	66	fprintf(stderr, "Cannot read optionsfw settings\n");
	67	exit(1);
	68	}
	69
d69bf619	70	/* Get the BLUE interface details */
27ba58fb MT	71	if (findkey(kv, "BLUE_DEV", blue_dev) > 0) {
	72	if ((strlen(blue_dev) > 0) && !VALID_DEVICE(blue_dev)) {
	73	fprintf(stderr, "Bad BLUE_DEV: %s\n", blue_dev);
	74	exit(1);
	75	}
d69bf619 MT	76	}
d69bf619 MT	77
27ba58fb	78	if (strlen(blue_dev) == 0) {
d69bf619 MT	79	exit(0);
	80	}
	81
	82	if ((fd = fopen(CONFIG_ROOT "/wireless/nodrop", "r")))
	83	return 0;
	84
	85	/* register exit handler to ensure the block rule is always present */
	86	atexit(exithandler);
	87
	88	if (!(fd = fopen(CONFIG_ROOT "/wireless/config", "r"))) {
	89	exit(0);
	90	}
	91
	92	/* restrict blue access tp the proxy port */
ec36876e	93	if (findkey(kv, "DROPPROXY", buffer) && strcmp(buffer, "on") == 0) {
d69bf619 MT	94	/* Read the proxy values */
	95	if (!readkeyvalues(kv, CONFIG_ROOT "/proxy/settings") \|\| !(findkey(kv, "PROXY_PORT", buffer))) {
	96	fprintf(stderr, "Cannot read proxy settings\n");
	97	exit(1);
	98	}
	99
7506baa2	100	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	101	safe_system(command);
7506baa2	102	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	103	safe_system(command);
	104	}
	105
	106	/* not allow blue to acces a samba server running on local fire*/
ec36876e	107	if (findkey(kv, "DROPSAMBA", buffer) && strcmp(buffer, "on") == 0) {
7506baa2	108	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	109	safe_system(command);
7506baa2	110	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	111	safe_system(command);
7506baa2	112	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	113	safe_system(command);
7506baa2	114	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	115	safe_system(command);
	116	}
	117
	118	while (fgets(buffer, STRING_SIZE, fd)) {
	119	buffer[strlen(buffer) - 1] = 0;
	120
	121	index = strtok(buffer, ",");
	122	ipaddress = strtok(NULL, ",");
	123	macaddress = strtok(NULL, ",");
	124	enabled = strtok(NULL, ",");
	125
f7bb0031	126	if (strcmp(enabled, "on") == 0) {
d69bf619 MT	127	/* both specified, added security */
d69bf619 MT	128	if ((strlen(macaddress) == 17) && (VALID_IP_AND_MASK(ipaddress))) {
645378fb	129	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSINPUT -m mac --mac-source %s -s %s -i %s -j RETURN", macaddress, ipaddress, blue_dev);
d69bf619	130	safe_system(command);
7506baa2	131	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	132	safe_system(command);
	133	} else {
	134	/* correctly formed mac address is 17 chars */
	135	if (strlen(macaddress) == 17) {
645378fb	136	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSINPUT -m mac --mac-source %s -i %s -j RETURN", macaddress, blue_dev);
d69bf619	137	safe_system(command);
7506baa2	138	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSFORWARD -m mac --mac-source %s -i %s -j RETURN", macaddress, blue_dev);
d69bf619	139	safe_system(command);
0aaef8e9 CS	140	}
0aaef8e9 CS	141
d69bf619	142	if (VALID_IP_AND_MASK(ipaddress)) {
645378fb	143	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSINPUT -s %s -i %s -j RETURN", ipaddress, blue_dev);
d69bf619	144	safe_system(command);
7506baa2	145	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSFORWARD -s %s -i %s -j RETURN", ipaddress, blue_dev);
d69bf619	146	safe_system(command);
0aaef8e9	147	}
d69bf619 MT	148	}
	149	}
	150	}
	151
	152	/* with this rule you can disable the logging of the dropped wireless input packets*/
ec36876e	153	if (findkey(kv, "DROPWIRELESSINPUT", buffer) && strcmp(buffer, "on") == 0) {
7506baa2	154	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSINPUT -i %s -j LOG --log-prefix 'DROP_Wirelessinput'", blue_dev);
d69bf619 MT	155	safe_system(command);
	156	}
	157
	158	/* with this rule you can disable the logging of the dropped wireless forward packets*/
ec36876e	159	if (findkey(kv, "DROPWIRELESSFORWARD", buffer) && strcmp(buffer, "on") == 0) {
7506baa2	160	snprintf(command, STRING_SIZE-1, "/sbin/iptables --wait -A WIRELESSFORWARD -i %s -j LOG --log-prefix 'DROP_Wirelessforward'", blue_dev);
d69bf619 MT	161	safe_system(command);
	162	}
	163
	164	return 0;
900832fa	165	}