PacketBL
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Comment:This has been verified to work, at least on a quick test. Need to test more thoroughly. Good for a beta release, anyway.
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SHA1: 697a450bd42d279beab51606e6e0f3169d0117b9
User & Date: rmiller on 2011-03-06 17:18:26
Other Links: manifest | tags
Context
2011-03-06
17:33
move include stuff to the include file. add new include file for packetbl_getstat check-in: 2dad03cf84 user: rmiller tags: trunk
17:18
This has been verified to work, at least on a quick test. Need to test more thoroughly. Good for a beta release, anyway. check-in: 697a450bd4 user: rmiller tags: trunk
02:10
This fixes a few segfaults with an empty config file. It's, of course, *useless* with an empty config file, but that's for testing at a later time. check-in: 5396b2b79c user: rmiller tags: trunk
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Modified config from [acf0fe0a90] to [0d25dcff77]. 

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# blacklistbl/whitelistbl blacklist
# whitelist/blacklist cidr


<host>
	blacklistbl	dnsbl.sorbs.net
	blacklistbl	relay.ordb.org
	whitelist	127.0.0.0/8
</host>


# uncomment this if you wish the fallthrough action to be to reject.
#FallthroughAccept	no

# uncomment this if you wish to handle other destination ports than SMTP.
# this is here so that you don't do something really stupid without reading
# the wiki and understanding all of the ramifications.
#AllowNonPort25		no

# uncomment this if you want to allow packets that don't have the SYN
# flag set.
#AllowNonSyn		no

# uncomment this to accept unconditionally while still logging as if you've
# done the rejecting.
#DryRun			no

# uncomment this to set the size of the cache to use.
#CacheSize		8192

# uncomment this to set the time-to-live for cached entries (in seconds)
#CacheTTL		3600

#LogFacility		daemon

# Set this to true to cause PacketBL to *NOT* write to syslog() every time a
# packet is processed.
#Quiet			no



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options: {
	allow_nonport25 = false;

	dryrun = false;
	queueno = 2;
	quiet = false;
	debug = 2;


};




























blacklist = [ "127.0.0.1" ];

Modified packetbl.c from [9a2b349279] to [939b1038a8]. 

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struct packet_info {

	uint8_t b1;
	uint8_t b2;
	uint8_t b3;
	uint8_t b4;

	int s_port;
	int d_port;

	int flags;
};

struct cidr {

	uint32_t ip;
................................................................................
	int	debug;
	struct config_entry *blacklistbl;
	struct config_entry *whitelistbl;
	struct config_entry *blacklist;
	struct config_entry *whitelist;
};

static struct config conf = { 0, 0, 1, 0, LOG_DAEMON, 0, 0, 0, NULL, NULL, NULL, NULL };

struct pbl_stat_info {
	uint32_t	cacheaccept;
	uint32_t	cachereject;
	uint32_t	whitelistblhits;
	uint32_t	blacklistblhits;
	uint32_t	whitelisthits;
................................................................................
		retval=NF_ACCEPT;
	} else
	if (check_packet_list(&ip, conf.blacklist) == 1) {
		get_ip_string(&ip);
		if (!conf.quiet) {
			if (conf.debug == 0) {
				syslog(LOG_INFO,
					"[reject blacklist] [%s]",
						msgbuf);
			} else {
				fprintf(stderr,
					"[reject blacklist] [%s]",
						msgbuf);
			}
				
		}
		statistics.blacklisthits++;
		retval=NF_DROP;
	} else
................................................................................
	/* there are default, so I'm not checking return values.  If it fails,
	 * then we'll just stay with the default, whatever that might be. */
	config_lookup_bool(config, "options.fallthroughaccept", &conf.default_accept);
	config_lookup_bool(config, "options.allownonport25", &conf.allow_non25);
	config_lookup_bool(config, "options.dryrun", &conf.dryrun);
	config_lookup_bool(config, "options.allownonsyn", &conf.allow_nonsyn);
	config_lookup_bool(config, "options.quiet", &conf.quiet);


#ifdef USE_CACHE
	config_lookup_int(config, "cache.ttl", &packet_cache_ttl);

	if (packet_cache_ttl < 0) {
		packet_cache_ttl = USE_CACHE_DEF_TTL;
		fprintf(stderr, "config cache TTL negative - using default");
................................................................................
				break;
			} else {
				i++;
			}
		}
	}
	
	config_lookup_int(config, "config.queueno", &conf.queueno);
	
	if (conf.queueno < 0) {
		conf.queueno = 1;
		fprintf(stderr, "queueno negative - using default");
	}

	config_setting = config_lookup(config, "blacklistbl");
................................................................................
	int i = 0, len = 0;
	char *setting;
#ifdef HAVE_FIREDNS
	size_t blacklistlen = 0;
#endif

	len = config_setting_length(c);
	while (i++ < len) {
		setting = config_setting_get_string_elem(c, i);



		ce = malloc(sizeof(struct config_entry));
		if (ce == NULL) {
			/* shouldn't happen... */
			fprintf(stderr, "Failed to allocate memory for ce struct\n");
			exit(EXIT_FAILURE);
		}

................................................................................
		ce->next = NULL;
#ifdef HAVE_FIREDNS
		blacklistlen = strlen(ce->string);
		if (ce->string[blacklistlen - 1] == '.') {
			ce->string[blacklistlen - 1] = '\0';
		}
#endif



		switch (type) {
			case 1:
				if (conf.blacklistbl == NULL) {
					conf.blacklistbl = ce;
					continue;
				} else {
................................................................................
				if (conf.whitelistbl == NULL) {
					conf.whitelistbl = ce;
					continue;
				} else {
					tmp = conf.whitelistbl;
				}
			case 3:

				if (parse_cidr(ce) == -1) {
					fprintf(stderr, "Error parsing CIDR in %s, ignoring\n", ce->string);
					free(ce->string);
					free(ce);
					continue;
				}
				if (conf.blacklist == NULL) {
................................................................................
			syslog(LOG_ERR, "sprintf failed in line %d: %s",
				__LINE__, strerror(errno));
			exit(1);
		}
		return;
	}

	rv = snprintf(msgbuf, sizeof(msgbuf), "%hhu.%hhu.%hhu.%hhu:%d.%d", 
			ip->b1, ip->b2, ip->b3, ip->b4,
			ip->s_port,ip->d_port);
		if (rv < 0) {
			syslog(LOG_ERR, "snprintf failed in line %d: %s",
				__LINE__, strerror(errno));
			exit(1);
		}








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struct packet_info {

	uint8_t b1;
	uint8_t b2;
	uint8_t b3;
	uint8_t b4;

	unsigned int s_port;
	unsigned int d_port;

	int flags;
};

struct cidr {

	uint32_t ip;
................................................................................
	int	debug;
	struct config_entry *blacklistbl;
	struct config_entry *whitelistbl;
	struct config_entry *blacklist;
	struct config_entry *whitelist;
};

static struct config conf = { 0, 0, 1, 0, LOG_DAEMON, 1, 0, 0, NULL, NULL, NULL, NULL };

struct pbl_stat_info {
	uint32_t	cacheaccept;
	uint32_t	cachereject;
	uint32_t	whitelistblhits;
	uint32_t	blacklistblhits;
	uint32_t	whitelisthits;
................................................................................
		retval=NF_ACCEPT;
	} else
	if (check_packet_list(&ip, conf.blacklist) == 1) {
		get_ip_string(&ip);
		if (!conf.quiet) {
			if (conf.debug == 0) {
				syslog(LOG_INFO,
					"[reject blacklist] [%s]\n",
						msgbuf);
			} else {
				fprintf(stderr,
					"[reject blacklist] [%s]\n",
						msgbuf);
			}
				
		}
		statistics.blacklisthits++;
		retval=NF_DROP;
	} else
................................................................................
	/* there are default, so I'm not checking return values.  If it fails,
	 * then we'll just stay with the default, whatever that might be. */
	config_lookup_bool(config, "options.fallthroughaccept", &conf.default_accept);
	config_lookup_bool(config, "options.allownonport25", &conf.allow_non25);
	config_lookup_bool(config, "options.dryrun", &conf.dryrun);
	config_lookup_bool(config, "options.allownonsyn", &conf.allow_nonsyn);
	config_lookup_bool(config, "options.quiet", &conf.quiet);
	config_lookup_int(config, "options.debug", &conf.debug);

#ifdef USE_CACHE
	config_lookup_int(config, "cache.ttl", &packet_cache_ttl);

	if (packet_cache_ttl < 0) {
		packet_cache_ttl = USE_CACHE_DEF_TTL;
		fprintf(stderr, "config cache TTL negative - using default");
................................................................................
				break;
			} else {
				i++;
			}
		}
	}
	
	config_lookup_int(config, "options.queueno", &conf.queueno);
	
	if (conf.queueno < 0) {
		conf.queueno = 1;
		fprintf(stderr, "queueno negative - using default");
	}

	config_setting = config_lookup(config, "blacklistbl");
................................................................................
	int i = 0, len = 0;
	char *setting;
#ifdef HAVE_FIREDNS
	size_t blacklistlen = 0;
#endif

	len = config_setting_length(c);
	while (i < len) {
		setting = config_setting_get_string_elem(c, i);
		if (setting == NULL) {
			break;
		}
		ce = malloc(sizeof(struct config_entry));
		if (ce == NULL) {
			/* shouldn't happen... */
			fprintf(stderr, "Failed to allocate memory for ce struct\n");
			exit(EXIT_FAILURE);
		}

................................................................................
		ce->next = NULL;
#ifdef HAVE_FIREDNS
		blacklistlen = strlen(ce->string);
		if (ce->string[blacklistlen - 1] == '.') {
			ce->string[blacklistlen - 1] = '\0';
		}
#endif

		i++;

		switch (type) {
			case 1:
				if (conf.blacklistbl == NULL) {
					conf.blacklistbl = ce;
					continue;
				} else {
................................................................................
				if (conf.whitelistbl == NULL) {
					conf.whitelistbl = ce;
					continue;
				} else {
					tmp = conf.whitelistbl;
				}
			case 3:
				fprintf(stderr, "got %s for blacklist\n", ce->string);
				if (parse_cidr(ce) == -1) {
					fprintf(stderr, "Error parsing CIDR in %s, ignoring\n", ce->string);
					free(ce->string);
					free(ce);
					continue;
				}
				if (conf.blacklist == NULL) {
................................................................................
			syslog(LOG_ERR, "sprintf failed in line %d: %s",
				__LINE__, strerror(errno));
			exit(1);
		}
		return;
	}

	rv = snprintf(msgbuf, sizeof(msgbuf), "%hhu.%hhu.%hhu.%hhu:%hu.%hu", 
			ip->b1, ip->b2, ip->b3, ip->b4,
			ip->s_port,ip->d_port);
		if (rv < 0) {
			syslog(LOG_ERR, "snprintf failed in line %d: %s",
				__LINE__, strerror(errno));
			exit(1);
		}

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