Xtables-addons 1.19

pknlusr.c: In function "main":
pknlusr.c:81:25: warning: cast to pointer from integer of different size
pknlusr.c:81:7: warning: cast to pointer from integer of different size

.gitignore

@@ -6,10 +6,15 @@
 .libs
 Makefile
 Makefile.in
-GNUmakefile
 
 /downloads
 
+/Makefile.iptrules
+/Makefile.mans
+/.*.lst
+/matches.man
+/targets.man
+
 /aclocal.m4
 /autom4te*.cache
 /compile

INSTALL

@@ -19,6 +19,8 @@ Supported configurations for this release
 	  - CONFIG_NF_CONNTRACK or CONFIG_IP_NF_CONNTRACK
 	  - CONFIG_NF_CONNTRACK_MARK or CONFIG_IP_NF_CONNTRACK_MARK
 	    enabled =y or as module (=m)
+	  - CONFIG_CONNECTOR y/m if you wish to receive userspace
+	    notifications from pknock through netlink/connector
 
 Extra notes:
 
@@ -46,6 +48,9 @@ Configuring and compiling
 	/lib/modules/$(running version)/build, which usually points to
 	the right directory. (If not, you need to install something.)
 
+	For RPM building, it should be /usr/src/linux-obj/...
+	or whatever location the distro makes use of.
+
 --with-xtables=
 
 	Specifies the path to the directory where we may find
@@ -55,11 +60,11 @@ Configuring and compiling
 	include/xtables.h. (The latter to support both standard
 	/usr/include and the iptables source root.)
 
---with-libxtdir=
+--with-xtlibdir=
 
 	Specifies the path to where the newly built extensions should
 	be installed when `make install` is run. It uses the same
-	default as the Xtables package, ${libexecdir}/xtables.
+	default as the Xtables/iptables package, ${libexecdir}/xtables.
 
 If you want to enable debugging, use
 
@@ -72,15 +77,10 @@ much easier.)
 Build-time options
 ==================
 
-V= controls the kernel's make verbosity.
+V= controls the verbosity of make commands.
 V=0	"silent" (output filename)
 V=1	"verbose" (entire gcc command line)
 
-VU= controls the Xt-a make verbosity.
-VU=0	output filename
-VU=1	output filename and source file
-VU=2	entire gcc command line
-
 
 Note to distribution packagers
 ==============================

Makefile.am

@@ -5,16 +5,16 @@ SUBDIRS          = extensions
 
 man_MANS := xtables-addons.8
 
-xtables-addons.8: ${srcdir}/xtables-addons.8.in extensions/matches.man extensions/targets.man
-	${am__verbose_GEN}sed -e '/@MATCHES@/ r extensions/matches.man' -e '/@TARGET@/ r extensions/targets.man' $< >$@;
+.PHONY: FORCE
+FORCE:
 
-extensions/%:
-	${MAKE} ${AM_MAKEFLAGS} -C $(@D) $(@F)
+xtables-addons.8: FORCE
+	${MAKE} -f Makefile.mans all;
 
-install-exec-local:
+install-exec-hook:
 	depmod -a || :;
 
-config.status: extensions/GNUmakefile.in
+config.status: Makefile.iptrules.in
 
 .PHONY: tarball
 tarball:

Makefile.extra

@@ -0,0 +1,29 @@
+# -*- Makefile -*-
+# AUTOMAKE
+
+XA_SRCDIR = ${srcdir}
+XA_TOPSRCDIR = ${top_srcdir}
+XA_ABSTOPSRCDIR = ${abs_top_srcdir}
+export XA_SRCDIR
+export XA_TOPSRCDIR
+export XA_ABSTOPSRCDIR
+
+_mcall = -f ${top_builddir}/Makefile.iptrules
+
+all-local: user-all-local
+
+install-exec-local: user-install-local
+
+clean-local: user-clean-local
+
+user-all-local:
+	${MAKE} ${_mcall} all;
+
+# Have no user-install-data-local ATM
+user-install-local: user-install-exec-local
+
+user-install-exec-local:
+	${MAKE} ${_mcall} install;
+
+user-clean-local:
+	${MAKE} ${_mcall} clean;

Makefile.iptrules.in

@@ -0,0 +1,59 @@
+# -*- Makefile -*-
+# MANUAL
+
+prefix          = @prefix@
+exec_prefix     = @exec_prefix@
+libexecdir      = @libexecdir@
+xtlibdir        = @xtlibdir@
+
+CC              = @CC@
+CCLD            = ${CC}
+
+regular_CFLAGS  = @regular_CFLAGS@
+xtables_CFLAGS  = @xtables_CFLAGS@
+AM_CFLAGS       = ${regular_CFLAGS} ${xtables_CFLAGS}
+AM_DEPFLAGS     = -Wp,-MMD,$(@D)/.$(@F).d,-MT,$@
+
+AM_DEFAULT_VERBOSITY = 0
+am__v_CC_0           = @echo "  CC    " $@;
+am__v_CCLD_0         = @echo "  CCLD  " $@;
+am__v_GEN_0          = @echo "  GEN   " $@;
+am__v_SILENT_0       = @
+am__v_CC_            = ${am__v_CC_${AM_DEFAULT_VERBOSITY}}
+am__v_CCLD_          = ${am__v_CCLD_${AM_DEFAULT_VERBOSITY}}
+am__v_GEN_           = ${am__v_GEN_${AM_DEFAULT_VERBOSITY}}
+am__v_SILENT_        = ${am__v_SILENT_${AM_DEFAULT_VERBOSITY}}
+AM_V_CC              = ${am__v_CC_${V}}
+AM_V_CCLD            = ${am__v_CCLD_${V}}
+AM_V_GEN             = ${am__v_GEN_${V}}
+AM_V_silent          = ${am__v_GEN_${V}}
+
+include ${XA_TOPSRCDIR}/mconfig
+-include ${XA_TOPSRCDIR}/mconfig.*
+include ${XA_SRCDIR}/Mbuild
+-include ${XA_SRCDIR}/Mbuild.*
+
+targets := $(filter-out %/,${obj-m})
+subdirs_list := $(filter %/,${obj-m})
+
+.SECONDARY:
+
+.PHONY: all install clean
+
+all: ${targets}
+	@for i in ${subdirs_list}; do ${MAKE} -C $$i; done;
+
+install: ${targets}
+	@for i in ${subdirs_list}; do ${MAKE} -C $$i $@; done;
+	install -dm0755 "${DESTDIR}/${xtlibdir}";
+	install -pm0755 $^ "${DESTDIR}/${xtlibdir}";
+
+clean:
+	@for i in ${subdirs_list}; do ${MAKE} -C $$i $@; done;
+	rm -f *.oo *.so;
+
+lib%.so: lib%.oo
+	${AM_V_CCLD}${CCLD} ${AM_LDFLAGS} -shared ${LDFLAGS} -o $@ $<;
+
+%.oo: ${XA_SRCDIR}/%.c
+	${AM_V_CC}${CC} ${AM_DEPFLAGS} ${AM_CFLAGS} -DPIC -fPIC ${CFLAGS} -o $@ -c $<;

Makefile.mans.in

@@ -0,0 +1,40 @@
+# -*- Makefile -*-
+# MANUAL
+
+srcdir := @srcdir@
+
+wcman_matches := $(shell find "${srcdir}" -name 'libxt_[a-z]*.man')
+wcman_targets := $(shell find "${srcdir}" -name 'libxt_[A-Z]*.man')
+wlist_matches := $(patsubst ${srcdir}/libxt_%.man,%,${wcman_matches})
+wlist_targets := $(patsubst ${srcdir}/libxt_%.man,%,${wcman_targets})
+
+.PHONY: FORCE
+
+FORCE:
+
+.manpages.lst: FORCE
+	@echo "${wlist_targets} ${wlist_matches}" >$@.tmp; \
+	cmp -s $@ $@.tmp || mv $@.tmp $@; \
+	rm -f $@.tmp;
+
+man_run = \
+	${AM_V_GEN}for ext in $(1); do \
+		name="$${ext%.man}"; \
+		name="$${name\#\#*/libxt_}"; \
+		if [ -f "$$ext" ]; then \
+			echo ".SS $$name"; \
+			cat "$$ext"; \
+			continue; \
+		fi; \
+	done >$@;
+
+all: xtables-addons.8
+
+xtables-addons.8: ${srcdir}/xtables-addons.8.in matches.man targets.man
+	${AM_V_GEN}sed -e '/@MATCHES@/ r matches.man' -e '/@TARGET@/ r targets.man' $< >$@;
+
+matches.man: .manpages.lst ${wcman_matches}
+	$(call man_run,${wlist_matches})
+
+targets.man: .manpages.lst ${wcman_targets}
+	$(call man_run,${wlist_targets})

configure.ac

@@ -1,9 +1,9 @@
 
-AC_INIT([xtables-addons], [1.17])
+AC_INIT([xtables-addons], [1.19])
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_MACRO_DIR([m4])
 AC_PROG_INSTALL
-AM_INIT_AUTOMAKE([-Wall foreign subdir-objects])
+AM_INIT_AUTOMAKE([1.10 -Wall foreign subdir-objects])
 AC_PROG_CC
 AM_PROG_CC_C_O
 AC_DISABLE_STATIC
@@ -14,10 +14,7 @@ AC_ARG_WITH([kbuild],
 	AS_HELP_STRING([--with-kbuild=PATH],
 	[Path to kernel build directory [[/lib/modules/CURRENT/build]]]),
 	[kbuilddir="$withval"])
-AC_ARG_WITH([ksource],
-	AS_HELP_STRING([--with-ksource=PATH],
-	[Path to kernel source directory [[/lib/modules/CURRENT/source]]]),
-	[ksourcedir="$withval"])
+AC_ARG_WITH([ksource],,[ksourcedir="$withval"])
 AC_ARG_WITH([xtables],
 	AS_HELP_STRING([--with-xtables=PATH],
 	[Path to the Xtables includes [[none]]]),
@@ -79,13 +76,16 @@ krel="${krel#*.}";
 kminor="${krel%%.*}";
 krel="${krel#*.}";
 kmicro="${krel%%.*}";
-krel="${krel#*.}";
-kstable="${krel%%.*}";
-if test -z "$kstable"; then
+if test "$kmicro" = "$krel"; then
 	kstable=0;
+else
+	kstable="${krel#*.}";
+	if test -z "$kstable"; then
+		kstable=0;
+	fi;
 fi;
 echo "Found kernel version $kmajor.$kminor.$kmicro.$kstable in $kbuilddir";
-if test "$kmajor" -gt 2 -o "$kminor" -gt 6 -o "$kmicro" -gt 30; then
+if test "$kmajor" -gt 2 -o "$kminor" -gt 6 -o "$kmicro" -gt 32; then
 	echo "WARNING: You are trying a newer kernel. Results may vary. :-)";
 elif test \( "$kmajor" -lt 2 -o "$kminor" -lt 6 -o "$kmicro" -lt 17 \) -o \
     \( "$kmajor" -eq 2 -a "$kminor" -eq 6 -a "$kmicro" -eq 18 -a \
@@ -100,5 +100,7 @@ AC_SUBST([kinclude_CFLAGS])
 AC_SUBST([kbuilddir])
 AC_SUBST([ksourcedir])
 AC_SUBST([xtlibdir])
-AC_CONFIG_FILES([Makefile extensions/GNUmakefile extensions/ipset/GNUmakefile])
+AC_CONFIG_FILES([Makefile Makefile.iptrules Makefile.mans
+	extensions/Makefile extensions/ACCOUNT/Makefile
+	extensions/ipset/Makefile extensions/pknock/Makefile])
 AC_OUTPUT

doc/README.psd

@@ -0,0 +1,4 @@
+PSD (Portscan Detection) External extensions for Xtables-addons
+
+Example:
+iptables -A INPUT -m psd --psd-weight-threshold 21 --psd-delay-threshold 300 --psd-lo-ports-weight 1 --psd-hi-ports-weight 10 -j LOG --log-prefix "PSD: "

doc/changelog.txt

@@ -1,4 +1,42 @@
 
+HEAD
+====
+
+
+Xtables-addons 1.19 (October 12 2009)
+=====================================
+- build: compile fixes for 2.6.31-rt
+- build: support for Linux 2.6.32
+- ipp2p: try to address underflows
+- psd: avoid potential crash when dealing with non-linear skbs
+- merge xt_ACCOUNT userspace utilities
+- added reworked xt_pknock module
+  Changes from pknock v0.5:
+  - pknock: "strict" and "checkip" flags were not displayed in `iptables -L`
+  - pknock: the GC expire time's lower bound is now the default gc time
+    (65000 msec) to avoid rendering anti-spoof protection in SPA mode useless
+  - pknock: avoid crash on memory allocation failure and fix memleak
+  - pknock: avoid fillup of peer table during DDoS
+  - pknock: automatic closing of ports
+  - pknock: make non-zero time mandatory for TCP mode
+  - pknock: display only pknock mode and state relevant information in procfs
+  - pknock: check interknock time only for !ST_ALLOWED peers
+  - pknock: preserve time/autoclose values for rules added in
+    reverse/arbitrary order
+  - pknock: add a manpage
+
+
+Xtables-addons 1.18 (September 09 2009)
+=======================================
+- build: support for Linux 2.6.31
+- ipset: fast forward to v3.2
+- quota2: support anonymous counters
+- quota2: reduce memory footprint for anonymous counters
+- quota2: extend locked period during cleanup (locking bugfix)
+- quota2: use strtoull instead of strtoul
+- merged xt_ACCOUNT module
+- merged xt_psd module
+
 
 Xtables-addons 1.17 (June 16 2009)
 ==================================

extensions/.gitignore

@@ -8,8 +8,5 @@ Module.symvers
 Modules.symvers
 modules.order
 
-/*.so
-/*.oo
-/matches.man
-/targets.man
-/.manpages.lst
+*.so
+*.oo

extensions/ACCOUNT/.gitignore

@@ -0,0 +1 @@
+/iptaccount

extensions/ACCOUNT/Kbuild

@@ -0,0 +1,5 @@
+# -*- Makefile -*-
+
+EXTRA_CFLAGS = -I${src}/..
+
+obj-m += xt_ACCOUNT.o

extensions/ACCOUNT/Makefile.am

@@ -0,0 +1,8 @@
+# -*- Makefile -*-
+
+include ../../Makefile.extra
+
+sbin_PROGRAMS = iptaccount
+iptaccount_LDADD = libxt_ACCOUNT_cl.la
+
+lib_LTLIBRARIES = libxt_ACCOUNT_cl.la

extensions/ACCOUNT/Mbuild

@@ -0,0 +1,3 @@
+# -*- Makefile -*-
+
+obj-${build_ACCOUNT}     += libxt_ACCOUNT.so

extensions/ACCOUNT/iptaccount.c

@@ -0,0 +1,223 @@
+/***************************************************************************
+ *   Copyright (C) 2004-2006 by Intra2net AG                               *
+ *   opensource@intra2net.com                                              *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU Lesser General Public License           *
+ *   version 2.1 as published by the Free Software Foundation;             *
+ *                                                                         *
+ ***************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <getopt.h>
+#include <signal.h>
+
+#include <libxt_ACCOUNT_cl.h>
+
+bool exit_now;
+static void sig_term(int signr)
+{
+	signal(SIGINT, SIG_IGN);
+	signal(SIGQUIT, SIG_IGN);
+	signal(SIGTERM, SIG_IGN);
+
+	exit_now = true;
+}
+
+char *addr_to_dotted(unsigned int);
+char *addr_to_dotted(unsigned int addr)
+{
+	static char buf[17];
+	const unsigned char *bytep;
+
+	bytep = (const unsigned char *)&addr;
+	snprintf(buf, 16, "%u.%u.%u.%u", bytep[0], bytep[1], bytep[2], bytep[3]);
+	buf[16] = 0;
+	return buf;
+}
+
+static void show_usage(void)
+{
+	printf("Unknown command line option. Try: [-u] [-h] [-a] [-f] [-c] [-s] [-l name]\n");
+	printf("[-u] show kernel handle usage\n");
+	printf("[-h] free all kernel handles (experts only!)\n\n");
+	printf("[-a] list all table names\n");
+	printf("[-l name] show data in table <name>\n");
+	printf("[-f] flush data after showing\n");
+	printf("[-c] loop every second (abort with CTRL+C)\n");
+	printf("[-s] CSV output (for spreadsheet import)\n");
+	printf("\n");
+}
+
+int main(int argc, char *argv[])
+{
+	struct ipt_ACCOUNT_context ctx;
+	struct ipt_acc_handle_ip *entry;
+	int i;
+	char optchar;
+	bool doHandleUsage = false, doHandleFree = false, doTableNames = false;
+	bool doFlush = false, doContinue = false, doCSV = false;
+
+	char *table_name = NULL;
+	const char *name;
+
+	printf("\nlibxt_ACCOUNT_cl userspace accounting tool v%s\n\n",
+	LIBXT_ACCOUNT_VERSION);
+
+	if (argc == 1)
+	{
+		show_usage();
+		exit(0);
+	}
+
+	while ((optchar = getopt(argc, argv, "uhacfsl:")) != -1)
+	{
+		switch (optchar)
+		{
+		case 'u':
+			doHandleUsage = true;
+			break;
+		case 'h':
+			doHandleFree = true;
+			break;
+		case 'a':
+			doTableNames = true;
+			break;
+		case 'f':
+			doFlush = true;
+			break;
+		case 'c':
+			doContinue = true;
+			break;
+		case 's':
+			doCSV = true;
+			break;
+		case 'l':
+			table_name = strdup(optarg);
+			break;
+		case '?':
+		default:
+			show_usage();
+			exit(0);
+			break;
+		}
+	}
+
+	// install exit handler
+	if (signal(SIGTERM, sig_term) == SIG_ERR)
+	{
+		printf("can't install signal handler for SIGTERM\n");
+		exit(-1);
+	}
+	if (signal(SIGINT, sig_term) == SIG_ERR)
+	{
+		printf("can't install signal handler for SIGINT\n");
+		exit(-1);
+	}
+	if (signal(SIGQUIT, sig_term) == SIG_ERR)
+	{
+		printf("can't install signal handler for SIGQUIT\n");
+		exit(-1);
+	}
+
+	if (ipt_ACCOUNT_init(&ctx))
+	{
+		printf("Init failed: %s\n", ctx.error_str);
+		exit(-1);
+	}
+
+	// Get handle usage?
+	if (doHandleUsage)
+	{
+		int rtn = ipt_ACCOUNT_get_handle_usage(&ctx);
+		if (rtn < 0)
+		{
+			printf("get_handle_usage failed: %s\n", ctx.error_str);
+			exit(-1);
+		}
+
+		printf("Current kernel handle usage: %d\n", ctx.handle.itemcount);
+	}
+
+	if (doHandleFree)
+	{
+		int rtn = ipt_ACCOUNT_free_all_handles(&ctx);
+		if (rtn < 0)
+		{
+			printf("handle_free_all failed: %s\n", ctx.error_str);
+			exit(-1);
+		}
+
+		printf("Freed all handles in kernel space\n");
+	}
+
+	if (doTableNames)
+	{
+		int rtn = ipt_ACCOUNT_get_table_names(&ctx);
+		if (rtn < 0)
+		{
+			printf("get_table_names failed: %s\n", ctx.error_str);
+			exit(-1);
+		}
+		while ((name = ipt_ACCOUNT_get_next_name(&ctx)) != 0)
+			printf("Found table: %s\n", name);
+	}
+
+	if (table_name)
+	{
+		// Read out data
+		if (doCSV)
+			printf("IP;SRC packets;SRC bytes;DST packets;DST bytes\n");
+		else
+			printf("Showing table: %s\n", table_name);
+
+		i = 0;
+		while (!exit_now)
+		{
+			// Get entries from table test
+			if (ipt_ACCOUNT_read_entries(&ctx, table_name, !doFlush))
+			{
+				printf("Read failed: %s\n", ctx.error_str);
+				ipt_ACCOUNT_deinit(&ctx);
+				exit(-1);
+			}
+
+			if (!doCSV)
+				printf("Run #%d - %u %s found\n", i, ctx.handle.itemcount,
+				       ctx.handle.itemcount == 1 ? "item" : "items");
+
+			// Output and free entries
+			while ((entry = ipt_ACCOUNT_get_next_entry(&ctx)) != NULL)
+			{
+				if (doCSV)
+					printf("%s;%u;%u;%u;%u\n",
+					       addr_to_dotted(entry->ip), entry->src_packets, entry->src_bytes,
+					       entry->dst_packets, entry->dst_bytes);
+				else
+					printf("IP: %s SRC packets: %u bytes: %u DST packets: %u bytes: %u\n",
+					       addr_to_dotted(entry->ip), entry->src_packets, entry->src_bytes,
+					       entry->dst_packets, entry->dst_bytes);
+			}
+
+			if (doContinue)
+			{
+				sleep(1);
+				i++;
+			} else
+				exit_now = true;
+		}
+	}
+
+	printf("Finished.\n");
+	ipt_ACCOUNT_deinit(&ctx);
+	exit(0);
+}

extensions/ACCOUNT/libxt_ACCOUNT.c

@@ -0,0 +1,168 @@
+/* Shared library add-on to iptables to add ACCOUNT(ing) support.
+   Author: Intra2net AG <opensource@intra2net.com>
+*/
+
+#include <stdio.h>
+#include <netdb.h>
+#include <string.h>
+#include <stdlib.h>
+#include <syslog.h>
+#include <getopt.h>
+#include <stddef.h>
+#include <xtables.h>
+#include "xt_ACCOUNT.h"
+
+static struct option account_tg_opts[] = {
+	{ .name = "addr",        .has_arg = 1, .flag = 0, .val = 'a' },
+	{ .name = "tname",       .has_arg = 1, .flag = 0, .val = 't' },
+	{ .name = 0 }
+};
+
+/* Function which prints out usage message. */
+static void account_tg_help(void)
+{
+	printf(
+"ACCOUNT target options:\n"
+" --%s ip/netmask\t\tBase network IP and netmask used for this table\n"
+" --%s name\t\t\tTable name for the userspace library\n",
+account_tg_opts[0].name, account_tg_opts[1].name);
+}
+
+/* Initialize the target. */
+static void
+account_tg_init(struct xt_entry_target *t)
+{
+	struct ipt_acc_info *accountinfo = (struct ipt_acc_info *)t->data;
+
+	accountinfo->table_nr = -1;
+}
+
+#define IPT_ACCOUNT_OPT_ADDR 0x01
+#define IPT_ACCOUNT_OPT_TABLE 0x02
+
+/* Function which parses command options; returns true if it
+   ate an option */
+
+static int account_tg_parse(int c, char **argv, int invert, unsigned int *flags,
+		const void *entry, struct xt_entry_target **target)
+{
+	struct ipt_acc_info *accountinfo = (struct ipt_acc_info *)(*target)->data;
+	struct in_addr *addrs = NULL, mask;
+	unsigned int naddrs = 0;
+
+	switch (c) {
+	case 'a':
+		if (*flags & IPT_ACCOUNT_OPT_ADDR)
+			xtables_error(PARAMETER_PROBLEM, "Can't specify --%s twice",
+				account_tg_opts[0].name);
+
+		if (xtables_check_inverse(optarg, &invert, NULL, 0))
+			xtables_error(PARAMETER_PROBLEM, "Unexpected `!' after --%s",
+				account_tg_opts[0].name);
+
+		xtables_ipparse_any(optarg, &addrs, &mask, &naddrs);
+		if (naddrs > 1)
+			xtables_error(PARAMETER_PROBLEM, "multiple IP addresses not allowed");
+
+		accountinfo->net_ip = addrs[0].s_addr;
+		accountinfo->net_mask = mask.s_addr;
+
+		*flags |= IPT_ACCOUNT_OPT_ADDR;
+		break;
+
+	case 't':
+		if (*flags & IPT_ACCOUNT_OPT_TABLE)
+			xtables_error(PARAMETER_PROBLEM,
+				"Can't specify --%s twice",
+				account_tg_opts[1].name);
+
+		if (xtables_check_inverse(optarg, &invert, NULL, 0))
+			xtables_error(PARAMETER_PROBLEM,
+				"Unexpected `!' after --%s",
+				account_tg_opts[1].name);
+
+		if (strlen(optarg) > ACCOUNT_TABLE_NAME_LEN - 1)
+			xtables_error(PARAMETER_PROBLEM,
+				"Maximum table name length %u for --%s",
+				ACCOUNT_TABLE_NAME_LEN - 1,
+				account_tg_opts[1].name);
+
+		strcpy(accountinfo->table_name, optarg);
+		*flags |= IPT_ACCOUNT_OPT_TABLE;
+		break;
+
+	default:
+		return 0;
+	}
+	return 1;
+}
+
+static void account_tg_check(unsigned int flags)
+{
+	if (!(flags & IPT_ACCOUNT_OPT_ADDR) || !(flags & IPT_ACCOUNT_OPT_TABLE))
+		xtables_error(PARAMETER_PROBLEM, "ACCOUNT: needs --%s and --%s",
+			account_tg_opts[0].name, account_tg_opts[1].name);
+}
+
+static void account_tg_print_it(const void *ip,
+		const struct xt_entry_target *target, char do_prefix)
+{
+	const struct ipt_acc_info *accountinfo
+		= (const struct ipt_acc_info *)target->data;
+	struct in_addr a;
+
+	if (!do_prefix)
+		printf("ACCOUNT ");
+
+	// Network information
+	if (do_prefix)
+		printf("--");
+	printf("%s ", account_tg_opts[0].name);
+
+	a.s_addr = accountinfo->net_ip;
+	printf("%s", xtables_ipaddr_to_numeric(&a));
+	a.s_addr = accountinfo->net_mask;
+	printf("%s", xtables_ipmask_to_numeric(&a));
+
+	printf(" ");
+	if (do_prefix)
+		printf("--");
+
+	printf("%s %s", account_tg_opts[1].name, accountinfo->table_name);
+}
+
+
+static void
+account_tg_print(const void *ip,
+	const struct xt_entry_target *target,
+	int numeric)
+{
+	account_tg_print_it(ip, target, 0);
+}
+
+/* Saves the union ipt_targinfo in parsable form to stdout. */
+static void
+account_tg_save(const void *ip, const struct xt_entry_target *target)
+{
+	account_tg_print_it(ip, target, 1);
+}
+
+static struct xtables_target account_tg_reg = {
+	.name          = "ACCOUNT",
+	.family        = AF_INET,
+	.version       = XTABLES_VERSION,
+	.size          = XT_ALIGN(sizeof(struct ipt_acc_info)),
+	.userspacesize = offsetof(struct ipt_acc_info, table_nr),
+	.help          = account_tg_help,
+	.init          = account_tg_init,
+	.parse         = account_tg_parse,
+	.final_check   = account_tg_check,
+	.print         = account_tg_print,
+	.save          = account_tg_save,
+	.extra_opts    = account_tg_opts,
+};
+
+static __attribute__((constructor)) void account_tg_ldr(void)
+{
+	xtables_register_target(&account_tg_reg);
+}

extensions/ACCOUNT/libxt_ACCOUNT.man

@@ -0,0 +1,72 @@
+The ACCOUNT target is a high performance accounting system for large
+local networks. It allows per-IP accounting in whole prefixes of IPv4
+addresses with size of up to /8 without the need to add individual
+accouting rule for each IP address.
+.PP
+The ACCOUNT is designed to be queried for data every second or at
+least every ten seconds. It is written as kernel module to handle high
+bandwidths without packet loss.
+.PP
+The largest possible subnet size is 24 bit, meaning for example 10.0.0.0/8
+network. ACCOUNT uses fixed internal data structures
+which speeds up the processing of each packet. Furthermore,
+accounting data for one complete 192.168.1.X/24 network takes 4 KB of
+memory. Memory for 16 or 24 bit networks is only allocated when
+needed.
+.PP
+To optimize the kernel<->userspace data transfer a bit more, the
+kernel module only transfers information about IPs, where the src/dst
+packet counter is not 0. This saves precious kernel time.
+.PP
+There is no /proc interface as it would be too slow for continuous access.
+The read-and-flush query operation is the fastest, as no internal data
+snapshot needs to be created&copied for all data. Use the "read"
+operation without flush only for debugging purposes!
+.PP
+Usage:
+.PP
+ACCOUNT takes two mandatory parameters:
+.TP
+\fB\-\-addr\fR \fInetwork\fP\fB/\fP\fInetmask\fR
+where \fInetwork\fP\fB/\fP\fInetmask\fP is the subnet to account for, in CIDR syntax
+.TP
+\fB\-\-tname\fP \fINAME\fP
+where \fINAME\fP is the name of the table where the accounting information
+should be stored
+.PP
+The subnet 0.0.0.0/0 is a special case: all data are then stored in the src_bytes
+and src_packets structure of slot "0". This is useful if you want
+to account the overall traffic to/from your internet provider.
+.PP
+The data can be queried using the userspace libxt_ACCOUNT_cl library,
+and by the reference implementation to show usage of this library,
+the \fBiptaccount\fP(8) tool, which features following options:
+.PP
+[\fB\-u\fP] show kernel handle usage
+.PP
+[\fB\-h\fP] free all kernel handles (experts only!)
+.PP
+[\fB\-a\fP] list all table names
+.PP
+[\fB\-l\fP \fIname\fP] show data in table \fIname\fP
+.PP
+[\fB\-f\fP] flush data after showing
+.PP
+[\fB\-c\fP] loop every second (abort with CTRL+C)
+.PP
+Here is an example of use:
+.PP
+iptables \-A FORWARD \-j ACCOUNT \-\-addr 0.0.0.0/0 \-\-tname all_outgoing;
+iptables \-A FORWARD \-j ACCOUNT \-\-addr 192.168.1.0/24 \-\-tname sales;
+.PP
+This creates two tables called "all_outgoing" and "sales" which can be
+queried using the userspace library/iptaccount tool.
+.PP
+Note that this target is non-terminating \(em the packet destined to it
+will continue traversing the chain in which it has been used.
+.PP
+Also note that once a table has been defined for specific CIDR address/netmask
+block, it can be referenced multiple times using \-j ACCOUNT, provided
+that both the original table name and address/netmask block are specified.
+.PP
+For more information go to http://www.intra2net.com/en/developer/ipt_ACCOUNT/

extensions/ACCOUNT/libxt_ACCOUNT_cl.c

@@ -0,0 +1,199 @@
+/***************************************************************************
+ *   Copyright (C) 2004 by Intra2net AG                                    *
+ *   opensource@intra2net.com                                              *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU Lesser General Public License           *
+ *   version 2.1 as published by the Free Software Foundation;             *
+ *                                                                         *
+ ***************************************************************************/
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <netinet/in.h>
+#include <linux/if.h>
+
+#include <libxt_ACCOUNT_cl.h>
+
+int ipt_ACCOUNT_init(struct ipt_ACCOUNT_context *ctx)
+{
+	memset(ctx, 0, sizeof(struct ipt_ACCOUNT_context));
+	ctx->handle.handle_nr = -1;
+
+	ctx->sockfd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
+	if (ctx->sockfd < 0) {
+		ctx->sockfd = -1;
+		ctx->error_str = "Can't open socket to kernel. "
+		                 "Permission denied or ipt_ACCOUNT module not loaded";
+		return -1;
+	}
+
+	// 4096 bytes default buffer should save us from reallocations
+	// as it fits 200 concurrent active clients
+	if ((ctx->data = malloc(IPT_ACCOUNT_MIN_BUFSIZE)) == NULL) {
+		close(ctx->sockfd);
+		ctx->sockfd = -1;
+		ctx->error_str = "Out of memory for data buffer";
+		return -1;
+	}
+	ctx->data_size = IPT_ACCOUNT_MIN_BUFSIZE;
+
+	return 0;
+}
+
+void ipt_ACCOUNT_free_entries(struct ipt_ACCOUNT_context *ctx)
+{
+	if (ctx->handle.handle_nr != -1) {
+		setsockopt(ctx->sockfd, IPPROTO_IP, IPT_SO_SET_ACCOUNT_HANDLE_FREE,
+		           &ctx->handle, sizeof(struct ipt_acc_handle_sockopt));
+		ctx->handle.handle_nr = -1;
+	}
+
+	ctx->handle.itemcount = 0;
+	ctx->pos = 0;
+}
+
+void ipt_ACCOUNT_deinit(struct ipt_ACCOUNT_context *ctx)
+{
+	free(ctx->data);
+	ctx->data = NULL;
+
+	ipt_ACCOUNT_free_entries(ctx);
+
+	close(ctx->sockfd);
+	ctx->sockfd = -1;
+}
+
+int ipt_ACCOUNT_read_entries(struct ipt_ACCOUNT_context *ctx,
+                             const char *table, char dont_flush)
+{
+	unsigned int s = sizeof(struct ipt_acc_handle_sockopt);
+	unsigned int new_size;
+	int rtn;
+
+	strncpy(ctx->handle.name, table, ACCOUNT_TABLE_NAME_LEN-1);
+
+	// Get table information
+	if (!dont_flush)
+		rtn = getsockopt(ctx->sockfd, IPPROTO_IP,
+		      IPT_SO_GET_ACCOUNT_PREPARE_READ_FLUSH, &ctx->handle, &s);
+	else
+		rtn = getsockopt(ctx->sockfd, IPPROTO_IP, IPT_SO_GET_ACCOUNT_PREPARE_READ,
+		      &ctx->handle, &s);
+
+	if (rtn < 0) {
+		ctx->error_str = "Can't get table information from kernel. "
+		                 "Does it exist?";
+		return -1;
+	}
+
+	// Check data buffer size
+	ctx->pos = 0;
+	new_size = ctx->handle.itemcount * sizeof(struct ipt_acc_handle_ip);
+	// We want to prevent reallocations all the time
+	if (new_size < IPT_ACCOUNT_MIN_BUFSIZE)
+		new_size = IPT_ACCOUNT_MIN_BUFSIZE;
+
+	// Reallocate if it's too small or twice as big
+	if (ctx->data_size < new_size || ctx->data_size > new_size * 2) {
+		// Free old buffer
+		free(ctx->data);
+		ctx->data_size = 0;
+
+		if ((ctx->data = malloc(new_size)) == NULL) {
+			ctx->error_str = "Out of memory for data buffer";
+			ipt_ACCOUNT_free_entries(ctx);
+			return -1;
+		}
+
+		ctx->data_size = new_size;
+	}
+
+	// Copy data from kernel
+	memcpy(ctx->data, &ctx->handle, sizeof(struct ipt_acc_handle_sockopt));
+	rtn = getsockopt(ctx->sockfd, IPPROTO_IP, IPT_SO_GET_ACCOUNT_GET_DATA,
+	      ctx->data, &ctx->data_size);
+	if (rtn < 0) {
+		ctx->error_str = "Can't get data from kernel. "
+		                 "Check /var/log/messages for details.";
+		ipt_ACCOUNT_free_entries(ctx);
+		return -1;
+	}
+
+	// Free kernel handle but don't reset pos/itemcount
+	setsockopt(ctx->sockfd, IPPROTO_IP, IPT_SO_SET_ACCOUNT_HANDLE_FREE,
+	           &ctx->handle, sizeof(struct ipt_acc_handle_sockopt));
+	ctx->handle.handle_nr = -1;
+
+	return 0;
+}
+
+struct ipt_acc_handle_ip *ipt_ACCOUNT_get_next_entry(struct ipt_ACCOUNT_context *ctx)
+{
+	struct ipt_acc_handle_ip *rtn;
+
+	// Empty or no more items left to return?
+	if (!ctx->handle.itemcount || ctx->pos >= ctx->handle.itemcount)
+		return NULL;
+
+	// Get next entry
+	rtn = (struct ipt_acc_handle_ip *)(ctx->data + ctx->pos
+	      * sizeof(struct ipt_acc_handle_ip));
+	ctx->pos++;
+
+	return rtn;
+}
+
+int ipt_ACCOUNT_get_handle_usage(struct ipt_ACCOUNT_context *ctx)
+{
+	unsigned int s = sizeof(struct ipt_acc_handle_sockopt);
+	if (getsockopt(ctx->sockfd, IPPROTO_IP,
+	    IPT_SO_GET_ACCOUNT_GET_HANDLE_USAGE, &ctx->handle, &s) < 0) {
+		ctx->error_str = "Can't get handle usage information from kernel";
+		return -1;
+	}
+	ctx->handle.handle_nr = -1;
+
+	return ctx->handle.itemcount;
+ }
+
+int ipt_ACCOUNT_free_all_handles(struct ipt_ACCOUNT_context *ctx)
+{
+	if (setsockopt(ctx->sockfd, IPPROTO_IP,
+	    IPT_SO_SET_ACCOUNT_HANDLE_FREE_ALL, NULL, 0) < 0) {
+		ctx->error_str = "Can't free all kernel handles";
+		return -1;
+	}
+
+	return 0;
+}
+
+int ipt_ACCOUNT_get_table_names(struct ipt_ACCOUNT_context *ctx)
+{
+	int rtn = getsockopt(ctx->sockfd, IPPROTO_IP,
+	          IPT_SO_GET_ACCOUNT_GET_TABLE_NAMES,
+	          ctx->data, &ctx->data_size);
+	if (rtn < 0) {
+		ctx->error_str = "Can't get table names from kernel. Out of memory, "
+		                 "MINBUFISZE too small?";
+		return -1;
+	}
+	ctx->pos = 0;
+	return 0;
+}
+
+const char *ipt_ACCOUNT_get_next_name(struct ipt_ACCOUNT_context *ctx)
+{
+	const char *rtn;
+	if (((char *)ctx->data)[ctx->pos] == 0)
+		return 0;
+
+	rtn = ctx->data + ctx->pos;
+	ctx->pos += strlen(ctx->data + ctx->pos) + 1;
+
+	return rtn;
+}

extensions/ACCOUNT/libxt_ACCOUNT_cl.h

@@ -0,0 +1,60 @@
+/***************************************************************************
+ *   Copyright (C) 2004 by Intra2net AG                                    *
+ *   opensource@intra2net.com                                              *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU Lesser General Public License           *
+ *   version 2.1 as published by the Free Software Foundation;             *
+ *                                                                         *
+ ***************************************************************************/
+
+#ifndef _xt_ACCOUNT_cl_H
+#define _xt_ACCOUNT_cl_H
+
+#include <xt_ACCOUNT.h>
+
+#define LIBXT_ACCOUNT_VERSION "1.3"
+
+/* Don't set this below the size of struct ipt_account_handle_sockopt */
+#define IPT_ACCOUNT_MIN_BUFSIZE 4096
+
+struct ipt_ACCOUNT_context
+{
+	int sockfd;
+	struct ipt_acc_handle_sockopt handle;
+
+	unsigned int data_size;
+	void *data;
+	unsigned int pos;
+
+	char *error_str;
+};
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int ipt_ACCOUNT_init(struct ipt_ACCOUNT_context *ctx);
+void ipt_ACCOUNT_deinit(struct ipt_ACCOUNT_context *ctx);
+
+void ipt_ACCOUNT_free_entries(struct ipt_ACCOUNT_context *ctx);
+int ipt_ACCOUNT_read_entries(struct ipt_ACCOUNT_context *ctx,
+                             const char *table, char dont_flush);
+struct ipt_acc_handle_ip *ipt_ACCOUNT_get_next_entry(
+                             struct ipt_ACCOUNT_context *ctx);
+
+/* ipt_ACCOUNT_free_entries is for internal use only function as this library
+is constructed to be used in a loop -> Don't allocate memory all the time.
+The data buffer is freed on deinit() */
+
+int ipt_ACCOUNT_get_handle_usage(struct ipt_ACCOUNT_context *ctx);
+int ipt_ACCOUNT_free_all_handles(struct ipt_ACCOUNT_context *ctx);
+int ipt_ACCOUNT_get_table_names(struct ipt_ACCOUNT_context *ctx);
+const char *ipt_ACCOUNT_get_next_name(struct ipt_ACCOUNT_context *ctx);
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif

extensions/ACCOUNT/xt_ACCOUNT.Kconfig

@@ -0,0 +1,13 @@
+config NETFILTER_XT_TARGET_ACCOUNT
+	tristate "ACCOUNT target support"
+	depends on NETFILTER_XTABLES
+	---help---
+	This module implements an ACCOUNT target
+
+	The ACCOUNT target is a high performance accounting system for large
+	local networks. It allows per-IP accounting in whole prefixes of IPv4
+	addresses with size of up to /8 without the need to add individual
+	accouting rule for each IP address.
+
+	For more information go to:
+	http://www.intra2net.com/de/produkte/opensource/ipt_account/

extensions/ACCOUNT/xt_ACCOUNT.h

@@ -0,0 +1,118 @@
+/***************************************************************************
+ *   Copyright (C) 2004-2006 by Intra2net AG                               *
+ *   opensource@intra2net.com                                              *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License                  *
+ *   version 2 as published by the Free Software Foundation;               *
+ *                                                                         *
+ ***************************************************************************/
+
+#ifndef _IPT_ACCOUNT_H
+#define _IPT_ACCOUNT_H
+
+/*
+ * Socket option interface shared between kernel (xt_ACCOUNT) and userspace
+ * library (libxt_ACCOUNT_cl). Hopefully we are unique at least within our
+ * kernel & xtables-addons space.
+ */
+#define SO_ACCOUNT_BASE_CTL 90
+
+#define IPT_SO_SET_ACCOUNT_HANDLE_FREE (SO_ACCOUNT_BASE_CTL + 1)
+#define IPT_SO_SET_ACCOUNT_HANDLE_FREE_ALL (SO_ACCOUNT_BASE_CTL + 2)
+#define IPT_SO_SET_ACCOUNT_MAX		 IPT_SO_SET_ACCOUNT_HANDLE_FREE_ALL
+
+#define IPT_SO_GET_ACCOUNT_PREPARE_READ (SO_ACCOUNT_BASE_CTL + 4)
+#define IPT_SO_GET_ACCOUNT_PREPARE_READ_FLUSH (SO_ACCOUNT_BASE_CTL + 5)
+#define IPT_SO_GET_ACCOUNT_GET_DATA (SO_ACCOUNT_BASE_CTL + 6)
+#define IPT_SO_GET_ACCOUNT_GET_HANDLE_USAGE (SO_ACCOUNT_BASE_CTL + 7)
+#define IPT_SO_GET_ACCOUNT_GET_TABLE_NAMES (SO_ACCOUNT_BASE_CTL + 8)
+#define IPT_SO_GET_ACCOUNT_MAX	  IPT_SO_GET_ACCOUNT_GET_TABLE_NAMES
+
+#define ACCOUNT_MAX_TABLES 128
+#define ACCOUNT_TABLE_NAME_LEN 32
+#define ACCOUNT_MAX_HANDLES 10
+
+/* Structure for the userspace part of ipt_ACCOUNT */
+struct ipt_acc_info {
+	uint32_t net_ip;
+	uint32_t net_mask;
+	char table_name[ACCOUNT_TABLE_NAME_LEN];
+	int32_t table_nr;
+};
+
+/* Internal table structure, generated by check_entry() */
+struct ipt_acc_table {
+	char name[ACCOUNT_TABLE_NAME_LEN];	 /* name of the table */
+	uint32_t ip;						  /* base IP of network */
+	uint32_t netmask;					 /* netmask of the network */
+	unsigned char depth;				   /* size of network:
+												 0: 8 bit, 1: 16bit, 2: 24 bit */
+	uint32_t refcount;					/* refcount of this table.
+												 if zero, destroy it */
+	uint32_t itemcount;				   /* number of IPs in this table */
+	void *data;							/* pointer to the actual data,
+												 depending on netmask */
+};
+
+/* Internal handle structure */
+struct ipt_acc_handle {
+	uint32_t ip;						  /* base IP of network. Used for
+												 caculating the final IP during
+												 get_data() */
+	unsigned char depth;				   /* size of network. See above for
+												 details */
+	uint32_t itemcount;				   /* number of IPs in this table */
+	void *data;							/* pointer to the actual data,
+												 depending on size */
+};
+
+/* Handle structure for communication with the userspace library */
+struct ipt_acc_handle_sockopt {
+	uint32_t handle_nr;				   /* Used for HANDLE_FREE */
+	char name[ACCOUNT_TABLE_NAME_LEN];	 /* Used for HANDLE_PREPARE_READ/
+												 HANDLE_READ_FLUSH */
+	uint32_t itemcount;				   /* Used for HANDLE_PREPARE_READ/
+												 HANDLE_READ_FLUSH */
+};
+
+/* Used for every IP entry
+   Size is 16 bytes so that 256 (class C network) * 16
+   fits in one kernel (zero) page */
+struct ipt_acc_ip {
+	uint32_t src_packets;
+	uint32_t src_bytes;
+	uint32_t dst_packets;
+	uint32_t dst_bytes;
+};
+
+/*
+	Used for every IP when returning data
+*/
+struct ipt_acc_handle_ip {
+	uint32_t ip;
+	uint32_t src_packets;
+	uint32_t src_bytes;
+	uint32_t dst_packets;
+	uint32_t dst_bytes;
+};
+
+/*
+	The IPs are organized as an array so that direct slot
+	calculations are possible.
+	Only 8 bit networks are preallocated, 16/24 bit networks
+	allocate their slots when needed -> very efficent.
+*/
+struct ipt_acc_mask_24 {
+	struct ipt_acc_ip ip[256];
+};
+
+struct ipt_acc_mask_16 {
+	struct ipt_acc_mask_24 *mask_24[256];
+};
+
+struct ipt_acc_mask_8 {
+	struct ipt_acc_mask_16 *mask_16[256];
+};
+
+#endif /* _IPT_ACCOUNT_H */

extensions/GNUmakefile.in

@@ -1,141 +0,0 @@
-# -*- Makefile -*-
-
-top_srcdir      := @top_srcdir@
-srcdir          := @srcdir@
-abstop_srcdir   := $(shell readlink -f ${top_srcdir})
-abssrcdir       := $(shell readlink -f ${srcdir})
-
-ifeq (${abstop_srcdir},)
-$(error Path resolution of ${top_srcdir} failed)
-endif
-ifeq (${abssrcdir},)
-$(error Path resolution of ${srcdir} failed)
-endif
-
-prefix          := @prefix@
-exec_prefix     := @exec_prefix@
-libdir          := @libdir@
-libexecdir      := @libexecdir@
-xtlibdir        := @xtlibdir@
-kbuilddir       := @kbuilddir@
-
-CC              := @CC@
-CCLD            := ${CC}
-CFLAGS          := @CFLAGS@
-LDFLAGS         := @LDFLAGS@
-regular_CFLAGS  := @regular_CFLAGS@
-kinclude_CFLAGS := @kinclude_CFLAGS@
-xtables_CFLAGS  := @xtables_CFLAGS@
-
-AM_CFLAGS      := ${regular_CFLAGS} -I${top_srcdir}/include ${xtables_CFLAGS} ${kinclude_CFLAGS}
-AM_DEPFLAGS     = -Wp,-MMD,$(@D)/.$(@F).d,-MT,$@
-
-VU := 0
-am__v_CC_0     = @echo "  CC      " $@;
-am__v_CCLD_0   = @echo "  CCLD    " $@;
-am__v_GEN_0    = @echo "  GEN     " $@;
-am__v_SILENT_0 = @
-AM_V_CC        = ${am__v_CC_${VU}}
-AM_V_CCLD      = ${am__v_CCLD_${VU}}
-AM_V_GEN       = ${am__v_GEN_${VU}}
-AM_V_silent    = ${am__v_GEN_${VU}}
-
-
-#
-#	Wildcard module list
-#
-include ${top_srcdir}/mconfig
--include ${top_srcdir}/mconfig.*
-include ${srcdir}/Mbuild
--include ${srcdir}/Mbuild.*
--include ${srcdir}/*.Mbuild
-
-
-#
-#	Building blocks
-#
-targets := $(filter-out %/,${obj-m})
-targets_install := ${targets}
-subdirs_list := $(filter %/,${obj-m})
-
-.SECONDARY:
-
-.PHONY: all install clean distclean FORCE
-
-all: subdirs modules user matches.man targets.man
-
-subdirs:
-	@for i in ${subdirs_list}; do ${MAKE} -C $$i; done;
-
-subdirs-install:
-	@for i in ${subdirs_list}; do ${MAKE} -C $$i install; done;
-
-user: ${targets}
-
-install: modules_install subdirs-install ${targets_install}
-	@mkdir -p "${DESTDIR}${xtlibdir}";
-	install -pm0755 ${targets_install} "${DESTDIR}${xtlibdir}/";
-
-clean: clean_modules
-	@for i in ${subdirs_list}; do make -C $$i clean; done;
-	rm -f *.oo *.so;
-
-distclean: clean
-	rm -f .*.d .manpages.lst;
-
--include .*.d
-
-
-#
-#	Call out to kbuild
-#
-.PHONY: modules modules_install clean_modules
-
-modules:
-	${AM_V_silent}if [ -n "${kbuilddir}" ]; then make -C ${kbuilddir} M=${abssrcdir} XA_TOPSRCDIR=${abstop_srcdir} modules; fi;
-
-modules_install:
-	${AM_V_silent}if [ -n "${kbuilddir}" ]; then make -C ${kbuilddir} M=${abssrcdir} XA_TOPSRCDIR=${abstop_srcdir} INSTALL_MOD_PATH=${DESTDIR} modules_install; fi;
-
-clean_modules:
-	${AM_V_silent}if [ -n "${kbuilddir}" ]; then make -C ${kbuilddir} M=${abssrcdir} XA_TOPSRCDIR=${abstop_srcdir} clean; fi;
-
-
-#
-#	Shared libraries
-#
-lib%.so: lib%.oo
-	${AM_V_CCLD}${CCLD} ${AM_LDFLAGS} -shared ${LDFLAGS} -o $@ $<;
-
-lib%.oo: ${srcdir}/lib%.c
-	${AM_V_CC}${CC} ${AM_DEPFLAGS} ${AM_CFLAGS} -D_INIT=lib$*_init -DPIC -fPIC ${CFLAGS} -o $@ -c $<;
-
-
-#
-#	Manpages
-#
-wcman_matches := $(wildcard ${srcdir}/libxt_[a-z]*.man)
-wcman_targets := $(wildcard ${srcdir}/libxt_[A-Z]*.man)
-wlist_matches := $(patsubst ${srcdir}/libxt_%.man,%,${wcman_matches})
-wlist_targets := $(patsubst ${srcdir}/libxt_%.man,%,${wcman_targets})
-
-.manpages.lst: FORCE
-	@echo "${wlist_targets} ${wlist_matches}" >$@.tmp; \
-	cmp -s $@ $@.tmp || mv $@.tmp $@; \
-	rm -f $@.tmp;
-
-man_run    = \
-	${AM_V_GEN}for ext in $(1); do \
-		f="${srcdir}/libxt_$$ext.man"; \
-		if [ -f "$$f" ]; then \
-			echo ".SS $$ext"; \
-			cat "$$f"; \
-			continue; \
-		fi; \
-	done >$@;
-
-matches.man: .manpages.lst ${wcman_matches}
-	$(call man_run,${wlist_matches})
-
-targets.man: .manpages.lst ${wcman_targets}
-	$(call man_run,${wlist_targets})

extensions/Kbuild

@@ -1,10 +1,11 @@
 # -*- Makefile -*-
 
-include ${XA_TOPSRCDIR}/mconfig
--include ${XA_TOPSRCDIR}/mconfig.*
+include ${XA_ABSTOPSRCDIR}/mconfig
+-include ${XA_ABSTOPSRCDIR}/mconfig.*
 
 obj-m                    += compat_xtables.o
 
+obj-${build_ACCOUNT}     += ACCOUNT/
 obj-${build_CHAOS}       += xt_CHAOS.o
 obj-${build_DELUDE}      += xt_DELUDE.o
 obj-${build_DHCPMAC}     += xt_DHCPMAC.o
@@ -25,6 +26,8 @@ obj-${build_ipset}       += ipset/
 obj-${build_ipv4options} += xt_ipv4options.o
 obj-${build_length2}     += xt_length2.o
 obj-${build_lscan}       += xt_lscan.o
+obj-${build_pknock}      += pknock/
+obj-${build_psd}         += xt_psd.o
 obj-${build_quota2}      += xt_quota2.o
 
 -include ${M}/*.Kbuild

extensions/Makefile.am

@@ -0,0 +1,24 @@
+# -*- Makefile -*-
+# AUTOMAKE
+
+# Not having Kbuild in Makefile.extra because it will already recurse
+.PHONY: modules modules_install clean_modules
+
+_kcall = -C ${kbuilddir} M=${abs_srcdir}
+
+modules:
+	${AM_V_silent}if [ -n "${kbuilddir}" ]; then ${MAKE} ${_kcall} modules; fi;
+
+modules_install:
+	${AM_V_silent}if [ -n "${kbuilddir}" ]; then ${MAKE} ${_kcall} INSTALL_MOD_PATH=${DESTDIR} ext-mod-dir='$${INSTALL_MOD_DIR}' modules_install; fi;
+
+clean_modules:
+	${AM_V_silent}if [ -n "${kbuilddir}" ]; then ${MAKE} ${_kcall} clean; fi;
+
+all-local: modules
+
+install-exec-local: modules_install
+
+clean-local: clean_modules
+
+include ../Makefile.extra

extensions/Mbuild

@@ -1,3 +1,6 @@
+# -*- Makefile -*-
+
+obj-${build_ACCOUNT}     += ACCOUNT/
 obj-${build_CHAOS}       += libxt_CHAOS.so
 obj-${build_DELUDE}      += libxt_DELUDE.so
 obj-${build_DHCPMAC}     += libxt_DHCPMAC.so libxt_dhcpmac.so
@@ -18,4 +21,6 @@ obj-${build_ipset}       += ipset/
 obj-${build_ipv4options} += libxt_ipv4options.so
 obj-${build_length2}     += libxt_length2.so
 obj-${build_lscan}       += libxt_lscan.so
+obj-${build_pknock}      += pknock/
+obj-${build_psd}         += libxt_psd.so
 obj-${build_quota2}      += libxt_quota2.so

extensions/compat_skbuff.h

@@ -4,6 +4,23 @@
 struct tcphdr;
 struct udphdr;
 
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 30)
+static inline void skb_dst_set(struct sk_buff *skb, struct dst_entry *dst)
+{
+	skb->dst = dst;
+}
+
+static inline struct dst_entry *skb_dst(const struct sk_buff *skb)
+{
+	return skb->dst;
+}
+
+static inline struct rtable *skb_rtable(const struct sk_buff *skb)
+{
+	return (void *)skb->dst;
+}
+#endif
+
 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 19)
 #	define skb_ifindex(skb) \
 		(((skb)->input_dev != NULL) ? (skb)->input_dev->ifindex : 0)

extensions/ipset/.gitignore

@@ -1,3 +1 @@
-*.oo
-*.so
 /ipset

extensions/ipset/GNUmakefile.in

@@ -1,85 +0,0 @@
-# -*- Makefile -*-
-
-top_srcdir      := @top_srcdir@
-srcdir          := @srcdir@
-datarootdir     := @datarootdir@
-abstop_srcdir   := $(shell readlink -f ${top_srcdir})
-abssrcdir       := $(shell readlink -f ${srcdir})
-
-ifeq (${abstop_srcdir},)
-$(error Path resolution of ${top_srcdir} failed)
-endif
-ifeq (${abssrcdir},)
-$(error Path resolution of ${srcdir} failed)
-endif
-
-prefix          := @prefix@
-exec_prefix     := @exec_prefix@
-sbindir         := @sbindir@
-libdir          := @libdir@
-libexecdir      := @libexecdir@
-xtlibdir        := @xtlibdir@
-kbuilddir       := @kbuilddir@
-man8dir         := @mandir@/man8
-
-CC              := @CC@
-CCLD            := ${CC}
-CFLAGS          := @CFLAGS@
-LDFLAGS         := @LDFLAGS@
-regular_CFLAGS  := @regular_CFLAGS@
-kinclude_CFLAGS := @kinclude_CFLAGS@
-xtables_CFLAGS  := @xtables_CFLAGS@
-
-AM_CFLAGS      := ${regular_CFLAGS} -I${top_srcdir}/include ${xtables_CFLAGS} ${kinclude_CFLAGS} -DIPSET_LIB_DIR=\"${xtlibdir}\"
-AM_DEPFLAGS     = -Wp,-MMD,$(@D)/.$(@F).d,-MT,$@
-
-VU := 0
-am__1verbose_CC_0     = @echo "  CC      " $@;
-am__1verbose_CCLD_0   = @echo "  CCLD    " $@;
-am__1verbose_CC_1     = @echo "  CC      " $@ "<-" $<;
-am__1verbose_CCLD_1   = @echo "  CCLD    " $@ "<-" $^;
-am__verbose_CC        = ${am__1verbose_CC_${VU}}
-am__verbose_CCLD      = ${am__1verbose_CCLD_${VU}}
-
-#
-#	Building blocks
-#
-targets := $(addsuffix .so,$(addprefix libipset_, \
-	iphash ipmap ipporthash ipportiphash ipportnethash iptree \
-	iptreemap macipmap nethash portmap setlist))
-
-.SECONDARY:
-
-.PHONY: all install clean distclean FORCE
-
-all: ipset ${targets}
-
-install: all
-	@mkdir -p "${DESTDIR}${sbindir}" "${DESTDIR}${xtlibdir}" "${DESTDIR}${man8dir}";
-	install -pm0755 ipset "${DESTDIR}${sbindir}/";
-	install -pm0755 ${targets} "${DESTDIR}${xtlibdir}/";
-	install -pm0644 ipset.8 "${DESTDIR}${man8dir}/";
-
-clean:
-	rm -f *.oo *.so *.o ipset;
-
-distclean: clean
-	rm -f .*.d;
-
--include .*.d
-
-
-ipset: ipset.o
-	${am__verbose_CCLD}${CCLD} ${AM_LDFLAGS} ${LDFLAGS} -o $@ $< -ldl -rdynamic;
-
-#
-#	Shared libraries
-#
-lib%.so: lib%.oo
-	${am__verbose_CCLD}${CCLD} ${AM_LDFLAGS} -shared ${LDFLAGS} -o $@ $<;
-
-libipset_%.oo: ${srcdir}/ipset_%.c
-	${am__verbose_CC}${CC} ${AM_DEPFLAGS} ${AM_CFLAGS} -DPIC -fPIC ${CFLAGS} -o $@ -c $<;
-
-%.o: %.c
-	${am__verbose_CC}${CC} ${AM_DEPFLAGS} ${AM_CFLAGS} ${CFLAGS} -o $@ -c $<;

extensions/ipset/Makefile.am

@@ -0,0 +1,9 @@
+# -*- Makefile -*-
+
+AM_CFLAGS = ${regular_CFLAGS} -DIPSET_LIB_DIR=\"${xtlibdir}\"
+
+include ../../Makefile.extra
+
+sbin_PROGRAMS = ipset
+ipset_LDADD   = -ldl
+ipset_LDFLAGS = -rdynamic

extensions/ipset/Mbuild

@@ -0,0 +1,7 @@
+# -*- Makefile -*-
+
+obj-m += $(addprefix lib,$(patsubst %.c,%.so,$(notdir \
+	$(wildcard ${XA_SRCDIR}/ipset_*.c))))
+
+libipset_%.oo: ${XA_SRCDIR}/ipset_%.c
+	${AM_V_CC}${CC} ${AM_DEPFLAGS} ${AM_CFLAGS} -DPIC -fPIC ${CFLAGS} -o $@ -c $<;

extensions/ipset/ip_set.c

@@ -39,7 +39,7 @@
 static struct list_head set_type_list;		/* all registered sets */
 static struct ip_set **ip_set_list;		/* all individual sets */
 static DEFINE_RWLOCK(ip_set_lock);		/* protects the lists and the hash */
-static DECLARE_MUTEX(ip_set_app_mutex);		/* serializes user access */
+static struct semaphore ip_set_app_mutex;	/* serializes user access */
 static ip_set_id_t ip_set_max = CONFIG_IP_NF_SET_MAX;
 static ip_set_id_t ip_set_bindings_hash_size =  CONFIG_IP_NF_SET_HASHSIZE;
 static struct list_head *ip_set_hash;		/* hash of bindings */
@@ -1911,13 +1911,23 @@ ip_set_sockfn_get(struct sock *sk, int optval, void *user, int *len)
 		    	res = -ENOENT;
 		    	goto done;
 		}
+
+#define SETLIST(set)	(strcmp(set->type->typename, "setlist") == 0)
+
 		used = 0;
 		if (index == IP_SET_INVALID_ID) {
-			/* Save all sets */
+			/* Save all sets: ugly setlist type dependency */
+			int setlist = 0;
+		setlists:
 			for (i = 0; i < ip_set_max && res == 0; i++) {
-				if (ip_set_list[i] != NULL)
+				if (ip_set_list[i] != NULL
+				    && !(setlist ^ SETLIST(ip_set_list[i])))
 					res = ip_set_save_set(i, data, &used, *len);
 			}
+			if (!setlist) {
+				setlist = 1;
+				goto setlists;
+			}
 		} else {
 			/* Save an individual set */
 			res = ip_set_save_set(index, data, &used, *len);
@@ -2006,6 +2016,7 @@ static int __init ip_set_init(void)
 	int res;
 	ip_set_id_t i;
 
+	sema_init(&ip_set_app_mutex, 1);
 	get_random_bytes(&ip_set_hash_random, 4);
 	if (max_sets)
 		ip_set_max = max_sets;

extensions/ipset/ip_set_iptree.c

@@ -10,6 +10,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/ip.h>
+#include <linux/jiffies.h>
 #include <linux/skbuff.h>
 #include <linux/slab.h>
 #include <linux/delay.h>

extensions/ipset/ip_set_iptreemap.c

@@ -14,6 +14,7 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/ip.h>
+#include <linux/jiffies.h>
 #include <linux/skbuff.h>
 #include <linux/slab.h>
 #include <linux/delay.h>
@@ -338,7 +339,7 @@ KADT(iptreemap, add, ipaddr, ip)
 
 static inline int
 __delip_single(struct ip_set *set, ip_set_ip_t *hash_ip,
-	       ip_set_ip_t ip, unsigned int __nocast flags)
+	       ip_set_ip_t ip, gfp_t flags)
 {
 	struct ip_set_iptreemap *map = set->data;
 	struct ip_set_iptreemap_b *btree;
@@ -364,7 +365,7 @@ __delip_single(struct ip_set *set, ip_set_ip_t *hash_ip,
 
 static inline int
 iptreemap_del(struct ip_set *set, ip_set_ip_t *hash_ip,
-	      ip_set_ip_t start, ip_set_ip_t end, unsigned int __nocast flags)
+	      ip_set_ip_t start, ip_set_ip_t end, gfp_t flags)
 {
 	struct ip_set_iptreemap *map = set->data;
 	struct ip_set_iptreemap_b *btree;

extensions/ipset/ip_set_malloc.h

@@ -40,7 +40,7 @@ struct harray {
 };
 
 static inline void * 
-__harray_malloc(size_t hashsize, size_t typesize, int flags)
+__harray_malloc(size_t hashsize, size_t typesize, gfp_t flags)
 {
 	struct harray *harray;
 	size_t max_elements, size, i, j;
@@ -88,7 +88,7 @@ __harray_malloc(size_t hashsize, size_t typesize, int flags)
 }
 
 static inline void *
-harray_malloc(size_t hashsize, size_t typesize, int flags)
+harray_malloc(size_t hashsize, size_t typesize, gfp_t flags)
 {
 	void *harray;
 	

extensions/ipset/ip_set_setlist.c

@@ -21,7 +21,7 @@
  * after  ==> ref, index
  */
 
-static inline bool
+static inline int
 next_index_eq(const struct ip_set_setlist *map, int i, ip_set_id_t index)
 {
 	return i < map->size && map->index[i] == index;
@@ -38,18 +38,16 @@ setlist_utest(struct ip_set *set, const void *data, u_int32_t size,
 	struct ip_set *s;
 	
 	if (req->before && req->ref[0] == '\0')
-		return -EINVAL;
+		return 0;
 
 	index = __ip_set_get_byname(req->name, &s);
 	if (index == IP_SET_INVALID_ID)
-		return -EEXIST;
+		return 0;
 	if (req->ref[0] != '\0') {
 		ref = __ip_set_get_byname(req->ref, &s);
-		if (ref == IP_SET_INVALID_ID) {
-			res = -EEXIST;
+		if (ref == IP_SET_INVALID_ID)
 			goto finish;
 	}
-	}
 	for (i = 0; i < map->size
 		    && map->index[i] != IP_SET_INVALID_ID; i++) {
 		if (req->before && map->index[i] == index) {
@@ -172,7 +170,7 @@ setlist_kadd(struct ip_set *set,
 	return res;
 }
 
-static inline bool
+static inline int
 unshift_setlist(struct ip_set_setlist *map, int i)
 {
 	int j;

extensions/ipset/ipset.8

@@ -50,6 +50,9 @@ IP set bindings pointing to sets and iptables matches and targets
 referring to sets creates references, which protects the given sets in 
 the kernel. A set cannot be removed (destroyed) while there is a single
 reference pointing to it.
+.P
+.B
+Please note, binding sets is a deprecated feature and will be removed in a later release. Switch to the multidata type of sets from using bindings.
 .SH OPTIONS
 The options that are recognized by
 .B ipset

extensions/ipset/ipset.c

@@ -30,7 +30,7 @@
 #define PROC_SYS_MODPROBE "/proc/sys/kernel/modprobe"
 #endif
 
-#define IPSET_VERSION "2.5.0"
+#define IPSET_VERSION "3.2"
 
 char program_name[] = "ipset";
 char program_version[] = IPSET_VERSION;

extensions/libxt_CHAOS.man

@@ -1,13 +1,13 @@
 Causes confusion on the other end by doing odd things with incoming packets.
 CHAOS will randomly reply (or not) with one of its configurable subtargets:
 .TP
-\fB--delude\fP
+\fB\-\-delude\fP
 Use the REJECT and DELUDE targets as a base to do a sudden or deferred
 connection reset, fooling some network scanners to return non-deterministic
 (randomly open/closed) results, and in case it is deemed open, it is actually
 closed/filtered.
 .TP
-\fB--tarpit\fP
+\fB\-\-tarpit\fP
 Use the REJECT and TARPIT target as a base to hold the connection until it
 times out. This consumes conntrack entries when connection tracking is loaded
 (which usually is on most machines), and routers inbetween you and the Internet

extensions/libxt_DHCPMAC.man

@@ -4,7 +4,7 @@ VMware does not allow to set a non-VMware MAC address before an operating
 system is booted (and the MAC be changed with `ip link set eth0 address
 aa:bb..`).
 .TP
-\fB--set-mac\fP \fIaa:bb:cc:dd:ee:ff\fP[\fB/\fP\fImask\fP]
+\fB\-\-set\-mac\fP \fIaa:bb:cc:dd:ee:ff\fP[\fB/\fP\fImask\fP]
 Replace the client host MAC address field in the DHCP message with the given
 MAC address. This option is mandatory. The \fImask\fP parameter specifies the
 prefix length of bits to change.
@@ -12,13 +12,13 @@ prefix length of bits to change.
 EXAMPLE, replacing all addresses from one of VMware's assigned vendor IDs
 (00:50:56) addresses with something else:
 .PP
-iptables -t mangle -A FORWARD -p udp --dport 67 -m physdev --physdev-in vmnet1
--m dhcpmac --mac 00:50:56:00:00:00/24 -j DHCPMAC --set-mac
-ab:cd:ef:00:00:00/24
+iptables \-t mangle \-A FORWARD \-p udp \-\-dport 67 \-m physdev
+\-\-physdev\-in vmnet1 \-m dhcpmac \-\-mac 00:50:56:00:00:00/24 \-j DHCPMAC
+\-\-set\-mac ab:cd:ef:00:00:00/24
 .PP
-iptables -t mangle -A FORWARD -p udp --dport 68 -m physdev --physdev-out vmnet1
--m dhcpmac --mac ab:cd:ef:00:00:00/24 -j DHCPMAC --set-mac
-00:50:56:00:00:00/24
+iptables \-t mangle \-A FORWARD \-p udp \-\-dport 68 \-m physdev
+\-\-physdev\-out vmnet1 \-m dhcpmac \-\-mac ab:cd:ef:00:00:00/24 \-j DHCPMAC
+\-\-set\-mac 00:50:56:00:00:00/24
 .PP
 (This assumes there is a bridge interface that has vmnet1 as a port. You will
 also need to add appropriate ebtables rules to change the MAC address of the

extensions/libxt_IPMARK.man

@@ -4,16 +4,16 @@ firewall based classifier.
 
 This target is to be used inside the \fBmangle\fP table.
 .TP
-\fB--addr\fP {\fBsrc\fP|\fBdst\fP}
+\fB\-\-addr\fP {\fBsrc\fP|\fBdst\fP}
 Select source or destination IP address as a basis for the mark.
 .TP
-\fB--and-mask\fP \fImask\fP
+\fB\-\-and\-mask\fP \fImask\fP
 Perform bitwise AND on the IP address and this bitmask.
 .TP
-\fB--or-mask\fP \fImask\fP
+\fB\-\-or\-mask\fP \fImask\fP
 Perform bitwise OR on the IP address and this bitmask.
 .TP
-\fB--shift\fP \fIvalue\fP
+\fB\-\-shift\fP \fIvalue\fP
 Shift addresses to the right by the given number of bits before taking it
 as a mark. (This is done before ANDing or ORing it.) This option is needed
 to select part of an IPv6 address, because marks are only 32 bits in size.
@@ -34,16 +34,16 @@ tc filter add dev eth3 parent 1:0 protocol ip fw
 .PP
 Earlier we had many rules just like below:
 .IP
-iptables -t mangle -A POSTROUTING -o eth3 -d 192.168.5.2 -j MARK
---set-mark 0x10502
+iptables \-t mangle \-A POSTROUTING \-o eth3 \-d 192.168.5.2 \-j MARK
+\-\-set\-mark 0x10502
 .IP
-iptables -t mangle -A POSTROUTING -o eth3 -d 192.168.5.3 -j MARK
---set-mark 0x10503
+iptables \-t mangle \-A POSTROUTING \-o eth3 \-d 192.168.5.3 \-j MARK
+\-\-set\-mark 0x10503
 .PP
 Using IPMARK target we can replace all the mangle/mark rules with only one:
 .IP
-iptables -t mangle -A POSTROUTING -o eth3 -j IPMARK --addr dst
---and-mask 0xffff --or-mask 0x10000
+iptables \-t mangle \-A POSTROUTING \-o eth3 \-j IPMARK \-\-addr dst
+\-\-and\-mask 0xffff \-\-or\-mask 0x10000
 .PP
 On the routers with hundreds of users there should be significant load
 decrease (e.g. twice).
@@ -52,5 +52,5 @@ decrease (e.g. twice).
 2001:db8:45:1d:20d:93ff:fe9b:e443 and the resulting mark should be 0x93ff,
 then a right-shift of 16 is needed first:
 .IP
--t mangle -A PREROUTING -s 2001:db8::/32 -j IPMARK --addr src --shift 16
---and-mask 0xFFFF
+\-t mangle \-A PREROUTING \-s 2001:db8::/32 \-j IPMARK \-\-addr src \-\-shift
+16 \-\-and\-mask 0xFFFF

extensions/libxt_LOGMARK.man

@@ -1,17 +1,17 @@
 The LOGMARK target will log packet and connection marks to syslog.
 .TP
-\fB--log-level\fR \fIlevel\fR
+\fB\-\-log\-level\fR \fIlevel\fR
 A logging level between 0 and 8 (inclusive).
 .TP
-\fB--log-prefix\fR \fIstring\fR
+\fB\-\-log\-prefix\fR \fIstring\fR
 Prefix log messages with the specified prefix; up to 29 bytes long, and useful
 for distinguishing messages in the logs.
 .TP
-\fB--log-nfmark\fR
+\fB\-\-log\-nfmark\fR
 Include the packet mark in the log.
 .TP
-\fB--log-ctmark\fR
+\fB\-\-log\-ctmark\fR
 Include the connection mark in the log.
 .TP
-\fB--log-secmark\fR
+\fB\-\-log\-secmark\fR
 Include the packet secmark in the log.

extensions/libxt_RAWDNAT.man

@@ -1,7 +1,7 @@
 The \fBRAWDNAT\fR target will rewrite the destination address in the IP header,
 much like the \fBNETMAP\fR target.
 .TP
-\fB--to-destination\fR \fIaddr\fR[\fB/\fR\fImask\fR]
+\fB\-\-to\-destination\fR \fIaddr\fR[\fB/\fR\fImask\fR]
 Network address to map to. The resulting address will be constructed the
 following way: All 'one' bits in the \fImask\fR are filled in from the new
 \fIaddress\fR. All bits that are zero in the mask are filled in from the

extensions/libxt_RAWSNAT.man

@@ -8,7 +8,7 @@ which makes it possible to change the source address either when the packet
 enters the machine or when it leaves it. The reason for this table constraint
 is that RAWNAT must happen outside of connection tracking.
 .TP
-\fB--to-source\fR \fIaddr\fR[\fB/\fR\fImask\fR]
+\fB\-\-to\-source\fR \fIaddr\fR[\fB/\fR\fImask\fR]
 Network address to map to. The resulting address will be constructed the
 following way: All 'one' bits in the \fImask\fR are filled in from the new
 \fIaddress\fR. All bits that are zero in the mask are filled in from the
@@ -17,13 +17,13 @@ original address.
 As an example, changing the destination for packets forwarded from an internal
 LAN to the internet:
 .IP
--t raw -A PREROUTING -i lan0 -d 212.201.100.135 -j RAWDNAT --to-destination 199.181.132.250
--t rawpost -A POSTROUTING -o lan0 -s 199.181.132.250 -j RAWSNAT --to-source 212.201.100.135
+\-t raw \-A PREROUTING \-i lan0 \-d 212.201.100.135 \-j RAWDNAT \-\-to\-destination 199.181.132.250;
+\-t rawpost \-A POSTROUTING \-o lan0 \-s 199.181.132.250 \-j RAWSNAT \-\-to\-source 212.201.100.135;
 .PP
 Note that changing addresses may influence the route selection! Specifically,
 it statically NATs packets, not connections, like the normal DNAT/SNAT targets
-would do. Also note that it can transform already-NATed connections -- as said,
-it is completely external to Netfilter's connection tracking/NAT.
+would do. Also note that it can transform already-NATed connections \(em as
+said, it is completely external to Netfilter's connection tracking/NAT.
 .PP
 If the machine itself generates packets that are to be rawnat'ed, you need a
 rule in the OUTPUT chain instead, just like you would with the stateful NAT

extensions/libxt_SYSRQ.man

@@ -1,7 +1,7 @@
 The SYSRQ target allows to remotely trigger sysrq on the local machine over the
 network. This can be useful when vital parts of the machine hang, for example
 an oops in a filesystem causing locks to be not released and processes to get
-stuck as a result - if still possible, use /proc/sysrq-trigger. Even when
+stuck as a result \(em if still possible, use /proc/sysrq-trigger. Even when
 processes are stuck, interrupts are likely to be still processed, and as such,
 sysrq can be triggered through incoming network packets.
 .PP
@@ -11,30 +11,30 @@ requests. The initial sequence number comes from the time of day so you will
 have a small window of vulnerability should time go backwards at a reboot.
 However, the file /sys/module/xt_SYSREQ/seqno can be used to both query and
 update the current sequence number. Also, you should limit as to who can issue
-commands using \fB-s\fP and/or \fB-m mac\fP, and also that the destination is
-correct using \fB-d\fP (to protect against potential broadcast packets), noting
-that it is still short of MAC/IP spoofing:
+commands using \fB\-s\fP and/or \fB\-m mac\fP, and also that the destination is
+correct using \fB\-d\fP (to protect against potential broadcast packets),
+noting that it is still short of MAC/IP spoofing:
 .IP
--A INPUT -s 10.10.25.1 -m mac --mac-source aa:bb:cc:dd:ee:ff -d 10.10.25.7
--p udp --dport 9 -j SYSRQ
+\-A INPUT \-s 10.10.25.1 \-m mac \-\-mac\-source aa:bb:cc:dd:ee:ff \-d
+10.10.25.7 \-p udp \-\-dport 9 \-j SYSRQ
 .IP
-(with IPsec) -A INPUT -s 10.10.25.1 -d 10.10.25.7 -m policy --dir in --pol
-ipsec --proto esp --tunnel-src 10.10.25.1 --tunnel-dst 10.10.25.7
--p udp --dport 9 -j SYSRQ
+(with IPsec) \-A INPUT \-s 10.10.25.1 \-d 10.10.25.7 \-m policy \-\-dir in
+\-\-pol ipsec \-\-proto esp \-\-tunnel\-src 10.10.25.1 \-\-tunnel\-dst
+10.10.25.7 \-p udp \-\-dport 9 \-j SYSRQ
 .PP
 You should also limit the rate at which connections can be received to limit
 the CPU time taken by illegal requests, for example:
 .IP
--A INPUT -s 10.10.25.1 -m mac --mac-source aa:bb:cc:dd:ee:ff -d 10.10.25.7
--p udp --dport 9 -m limit --limit 5/minute -j SYSRQ
+\-A INPUT \-s 10.10.25.1 \-m mac \-\-mac\-source aa:bb:cc:dd:ee:ff \-d
+10.10.25.7 \-p udp \-\-dport 9 \-m limit \-\-limit 5/minute \-j SYSRQ
 .PP
-This extension does not take any options. The \fB-p udp\fP options are
+This extension does not take any options. The \fB\-p udp\fP options are
 required.
 .PP
 The SYSRQ password can be changed through
 /sys/module/xt_SYSRQ/parameters/password, for example:
 .IP
-echo -n "password" >/sys/module/xt_SYSRQ/parameters/password
+echo \-n "password" >/sys/module/xt_SYSRQ/parameters/password
 .PP
 Alternatively, the password may be specified at modprobe time, but this is
 insecure as people can possible see it through ps(1). You can use an option
@@ -59,13 +59,13 @@ sysrq_key="s"  # the SysRq key(s)
 password="password"
 seqno="$(date +%s)"
 salt="$(dd bs=12 count=1 if=/dev/urandom 2>/dev/null |
-    openssl enc -base64)"
+    openssl enc \-base64)"
 req="$sysrq_key,$seqno,$salt"
-req="$req,$(echo -n "$req,$password" | sha1sum | cut -c1-40)"
+req="$req,$(echo \-n "$req,$password" | sha1sum | cut \-c1\-40)"
 
-echo "$req" | socat stdin udp-sendto:10.10.25.7:9
+echo "$req" | socat stdin udp\-sendto:10.10.25.7:9
 # or
-echo "$req" | netcat -uw1 10.10.25.7 9
+echo "$req" | netcat \-uw1 10.10.25.7 9
 .fi
 .PP
 See the Linux docs for possible sysrq keys. Important ones are: re(b)oot,

extensions/libxt_TARPIT.man

@@ -11,16 +11,16 @@ tarpit.
 
 To tarpit connections to TCP port 80 destined for the current machine:
 .IP
--A INPUT -p tcp -m tcp --dport 80 -j TARPIT
-.P
+\-A INPUT \-p tcp \-m tcp \-\-dport 80 \-j TARPIT
+.PP
 To significantly slow down Code Red/Nimda-style scans of unused address space,
 forward unused ip addresses to a Linux box not acting as a router (e.g. "ip
 route 10.0.0.0 255.0.0.0 ip.of.linux.box" on a Cisco), enable IP forwarding on
 the Linux box, and add:
 .IP
--A FORWARD -p tcp -j TARPIT
+\-A FORWARD \-p tcp \-j TARPIT
 .IP
--A FORWARD -j DROP
+\-A FORWARD \-j DROP
 .PP
 NOTE:
 If you use the conntrack module while you are using TARPIT, you should also use
@@ -28,6 +28,6 @@ the NOTRACK target, or the kernel will unnecessarily allocate resources for
 each TARPITted connection. To TARPIT incoming connections to the standard IRC
 port while using conntrack, you could:
 .IP
--t raw -A PREROUTING -p tcp --dport 6667 -j NOTRACK
+\-t raw \-A PREROUTING \-p tcp \-\-dport 6667 \-j NOTRACK
 .IP
--A INPUT -p tcp --dport 6667 -j TARPIT
+\-A INPUT \-p tcp \-\-dport 6667 \-j TARPIT

extensions/libxt_TEE.man

@@ -3,6 +3,6 @@ machine on the \fBlocal\fP network segment. In other words, the nexthop
 must be the target, or you will have to configure the nexthop to forward it
 further if so desired.
 .TP
-\fB--gw\fP \fIipaddr\fP
+\fB\-\-gw\fP \fIipaddr\fP
 Send the cloned packet to the host reachable at the given IP address.
 Use of 0.0.0.0 (for IPv4 packets) or :: (IPv6) is invalid.

extensions/libxt_condition.man

@@ -1,4 +1,4 @@
 This matches if a specific condition variable is (un)set.
 .TP
-[\fB!\fP] \fB--condition\fP \fIname\fP
+[\fB!\fP] \fB\-\-condition\fP \fIname\fP
 Match on boolean value stored in /proc/net/nf_condition/\fIname\fP.

extensions/libxt_dhcpmac.man

@@ -1,4 +1,4 @@
 .TP
-\fB--mac\fP \fIaa:bb:cc:dd:ee:ff\fP[\fB/\fP\fImask\fP]
+\fB\-\-mac\fP \fIaa:bb:cc:dd:ee:ff\fP[\fB/\fP\fImask\fP]
 Matches the DHCP "Client Host" address (a MAC address) in a DHCP message.
 \fImask\fP specifies the prefix length of the initial portion to match.

extensions/libxt_fuzzy.man

@@ -1,7 +1,7 @@
 This module matches a rate limit based on a fuzzy logic controller (FLC).
 .TP
-\fB--lower-limit\fP \fInumber\fP
+\fB\-\-lower\-limit\fP \fInumber\fP
 Specifies the lower limit, in packets per second.
 .TP
-\fB--upper-limit\fP \fInumber\fP
+\fB\-\-upper\-limit\fP \fInumber\fP
 Specifies the upper limit, also in packets per second.

extensions/libxt_geoip.man

@@ -1,9 +1,9 @@
 Match a packet by its source or destination country.
 .TP
-[\fB!\fP] \fB--src-cc\fP, \fB--source-country\fP \fIcountry\fP[\fB,\fP\fIcountry\fP\fB...\fP]
+[\fB!\fP] \fB\-\-src\-cc\fP, \fB\-\-source\-country\fP \fIcountry\fP[\fB,\fP\fIcountry\fP\fB...\fP]
 Match packet coming from (one of) the specified country(ies)
 .TP
-[\fB!\fP] \fB--dst-cc\fP, \fB--destination-country\fP \fIcountry\fP[\fB,\fP\fIcountry\fP\fB...\fP]
+[\fB!\fP] \fB\-\-dst\-cc\fP, \fB\-\-destination\-country\fP \fIcountry\fP[\fB,\fP\fIcountry\fP\fB...\fP]
 Match packet going to (one of) the specified country(ies)
 .TP
 NOTE:

extensions/libxt_iface.man

@@ -30,7 +30,7 @@ Check the MULTICAST flag.
 [\fB!\fP] \fB\-\-dynamic\fP
 Check the DYNAMIC flag.
 .TP
-[\fB!\fP] \fB\-\-lower-up\fP
+[\fB!\fP] \fB\-\-lower\-up\fP
 Check the LOWER_UP flag.
 .TP
 [\fB!\fP] \fB\-\-dormant\fP

extensions/libxt_ipp2p.man

@@ -1,41 +1,41 @@
 This module matches certain packets in P2P flows. It is not
-designed to match all packets belonging to a P2P connection - 
+designed to match all packets belonging to a P2P connection \(em
 use IPP2P together with CONNMARK for this purpose.
 .PP
-Use it together with -p tcp or -p udp to search these protocols
-only or without -p switch to search packets of both protocols.
+Use it together with \-p tcp or \-p udp to search these protocols
+only or without \-p switch to search packets of both protocols.
 .PP
 IPP2P provides the following options, of which one or more may be specified
 on the command line:
 .TP
-.B "--edk "
+\fB\-\-edk\fP
 Matches as many eDonkey/eMule packets as possible.
 .TP
-.B "--kazaa "
+\fB\-\-kazaa\fP
 Matches as many KaZaA packets as possible.
 .TP
-.B "--gnu "
+\fB\-\-gnu\fP
 Matches as many Gnutella packets as possible.
 .TP
-.B "--dc "
+\fB\-\-dc\fP
 Matches as many Direct Connect packets as possible.
 .TP
-.B "--bit "
+\fB\-\-bit\fP
 Matches BitTorrent packets.
 .TP
-.B "--apple "
+\fB\-\-apple\fP
 Matches AppleJuice packets.
 .TP
-.B "--soul "
+\fB\-\-soul\fP
 Matches some SoulSeek packets. Considered as beta, use careful!
 .TP
-.B "--winmx "
+\fB\-\-winmx\fP
 Matches some WinMX packets. Considered as beta, use careful!
 .TP
-.B "--ares "
-Matches Ares and AresLite packets. Use together with -j DROP only.
+\fB\-\-ares\fP
+Matches Ares and AresLite packets. Use together with \-j DROP only.
 .TP
-.B "--debug "
+\fB\-\-debug\fP
 Prints some information about each hit into kernel logfile. May 
 produce huge logfiles so beware!
 .PP
@@ -44,5 +44,5 @@ exchanged as a result of running filesharing programs.
 .PP
 There is more information on http://ipp2p.org/ , but it has not been updated
 since September 2006, and the syntax there is different from the ipp2p.c
-provided in Xtables-addons; most importantly, the --ipp2p flag was removed due
-to its ambiguity to match "all known" protocols.
+provided in Xtables-addons; most importantly, the \-\-ipp2p flag was removed
+due to its ambiguity to match "all known" protocols.

extensions/libxt_ipv4options.man

@@ -13,25 +13,25 @@ where only at least one symbol spec must be true.
 .PP
 Known symbol names (and their number):
 .PP
-1 - \fBnop\fP
+1 \(em \fBnop\fP
 .PP
-2 - \fBsecurity\fP - RFC 1108
+2 \(em \fBsecurity\fP \(em RFC 1108
 .PP
-3 - \fBlsrr\fP - Loose Source Routing, RFC 791
+3 \(em \fBlsrr\fP \(em Loose Source Routing, RFC 791
 .PP
-4 - \fBtimestamp\fP - RFC 781, 791
+4 \(em \fBtimestamp\fP \(em RFC 781, 791
 .PP
-7 - \fBrecord\-route\fP - RFC 791
+7 \(em \fBrecord\-route\fP \em RFC 791
 .PP
-9 - \fBssrr\fP - Strict Source Routing, RFC 791
+9 \(em \fBssrr\fP \(em Strict Source Routing, RFC 791
 .PP
-11 - \fBmtu\-probe\fP - RFC 1063
+11 \(em \fBmtu\-probe\fP \(em RFC 1063
 .PP
-12 - \fBmtu\-reply\fP - RFC 1063
+12 \(em \fBmtu\-reply\fP \(em RFC 1063
 .PP
-18 - \fBtraceroute\fP - RFC 1393
+18 \(em \fBtraceroute\fP \(em RFC 1393
 .PP
-20 - \fBrouter-alert\fP - RFC 2113
+20 \(em \fBrouter-alert\fP \(em RFC 2113
 .PP
 Examples:
 .PP

extensions/libxt_length.man

@@ -1,18 +1,19 @@
 This module matches the length of a packet against a specific value or range of
 values.
 .TP
-[\fB!\fR] \fB--length\fR \fIlength\fR[\fB:\fR\fIlength\fR]
+[\fB!\fR] \fB\-\-length\fR \fIlength\fR[\fB:\fR\fIlength\fR]
 Match exact length or length range.
 .TP
-\fB--layer3\fR
+\fB\-\-layer3\fR
 Match the layer3 frame size (e.g. IPv4/v6 header plus payload).
 .TP
-\fB--layer4\fR
+\fB\-\-layer4\fR
 Match the layer4 frame size (e.g. TCP/UDP header plus payload).
 .TP
-\fB--layer5\fR
+\fB\-\-layer5\fR
 Match the layer5 frame size (e.g. TCP/UDP payload, often called layer7).
 .PP
-If no --layer* option is given, --layer3 is assumed by default. Note that using
---layer5 may not match a packet if it is not one of the recognized types
-(currently TCP, UDP, UDPLite, ICMP, AH and ESP) or which has no 5th layer.
+If no \-\-layer* option is given, \-\-layer3 is assumed by default. Note that
+using \-\-layer5 may not match a packet if it is not one of the recognized
+types (currently TCP, UDP, UDPLite, ICMP, AH and ESP) or which has no 5th
+layer.

extensions/libxt_lscan.man

@@ -6,19 +6,19 @@ out, but this information can be used in conjunction with other rules to block
 the remote host's future connections. So this match module will match on the
 (probably) last packet the remote side will send to your machine.
 .TP
-\fB--stealth\fR
+\fB\-\-stealth\fR
 Match if the packet did not belong to any known TCP connection
 (Stealth/FIN/XMAS/NULL scan).
 .TP
-\fB--synscan\fR
+\fB\-\-synscan\fR
 Match if the connection was a TCP half-open discovery (SYN scan), i.e. the
 connection was torn down after the 2nd packet in the 3-way handshake.
 .TP
-\fB--cnscan\fR
+\fB\-\-cnscan\fR
 Match if the connection was a TCP full open discovery (connect scan), i.e. the
 connection was torn down after completion of the 3-way handshake.
 .TP
-\fB--grscan\fR
+\fB\-\-grscan\fR
 Match if data in the connection only flew in the direction of the remote side,
 e.g. if the connection was terminated after a locally running daemon sent its
 identification. (E.g. openssh, smtp, ftpd.) This may falsely trigger on

extensions/libxt_pknock.man

@@ -0,0 +1,113 @@
+Pknock match implements so-called "port knocking", a stealthy system
+for network authentication: a client sends packets to selected
+ports in a specific sequence (= simple mode, see example 1 below), or a HMAC
+payload to a single port (= complex mode, see example 2 below),
+to a target machine that has pknock rule(s) installed. The target machine
+then decides whether to unblock or block (again) the pknock-protected port(s).
+This can be used, for instance, to avoid brute force
+attacks on ssh or ftp services.
+.PP
+Example prerequisites:
+.IP
+modprobe cn
+.IP
+modprobe xt_pknock
+.PP
+Example 1 (TCP mode, manual closing of opened port not possible):
+.IP
+iptables -P INPUT DROP
+.IP
+iptables -A INPUT -p tcp -m pknock --knockports 4002,4001,4004 --strict
+--name SSH --time 10 --autoclose 60 --dport 22 -j ACCEPT
+.PP
+The rule will allow tcp port 22 for the attempting IP address after the successful reception of TCP SYN packets
+to ports 4002, 4001 and 4004, in this order (a.k.a. port-knocking).
+Port numbers in the connect sequence must follow the exact specification, no
+other ports may be "knocked" inbetween. The rule is named '\fBSSH\fP' \(em a file of
+the same name for tracking port knocking states will be created in
+\fB/proc/net/xt_pknock\fP .
+Successive port knocks must occur with delay of at most 10 seconds. Port 22 (from the example) will
+be automatiaclly dropped after 60 minutes after it was previously allowed.
+.PP
+Example 2 (UDP mode \(em non-replayable and non-spoofable, manual closing
+of opened port possible, secure, also called "SPA" = Secure Port
+Authorization):
+.IP
+iptables -A INPUT -p udp -m pknock --knockports 4000 --name FTP
+--opensecret foo --closesecret bar --autoclose 240 -j DROP
+.IP
+iptables -A INPUT -p tcp -m pknock --checkip --name FTP --dport 21 -j ACCEPT
+.PP
+The first rule will create an "ALLOWED" record in /proc/net/xt_pknock/FTP after
+the successful reception of an UDP packet to port 4000. The packet payload must be
+constructed as a HMAC256 using "foo" as a key. The HMAC content is the particular client's IP address as a 32-bit network byteorder quantity,
+plus the number of minutes since the Unix epoch, also as a 32-bit value.
+(This is known as Simple Packet Authorization, also called "SPA".)
+In such case, any subsequent attempt to connect to port 21 from the client's IP
+address will cause such packets to be accepted in the second rule.
+.PP
+Similarly, upon reception of an UDP packet constructed the same way, but with
+the key "bar", the first rule will remove a previously installed "ALLOWED" state
+record from /proc/net/xt_pknock/FTP, which means that the second rule will
+stop matching for subsequent connection attempts to port 21.
+In case no close-secret packet is received within 4 hours, the first rule
+will remove "ALLOWED" record from /proc/net/xt_pknock/FTP itself.
+.PP
+Things worth noting:
+.PP
+\fBGeneral\fP:
+.PP
+Specifying \fB--autoclose 0\fP means that no automatic close will be performed at all.
+.PP
+xt_pknock is capable of sending information about successful matches
+via a netlink socket to userspace, should you need to implement your own
+way of receiving and handling portknock notifications.
+Be sure to read the documentation in the doc/pknock/ directory,
+or visit the original site \(em http://portknocko.berlios.de/ .
+.PP
+\fBTCP mode\fP:
+.PP
+This mode is not immune against eavesdropping, spoofing and
+replaying of the port knock sequence by someone else (but its use may still
+be sufficient for scenarios where these factors are not necessarily
+this important, such as bare shielding of the SSH port from brute-force attacks).
+However, if you need these features, you should use UDP mode.
+.PP
+It is always wise to specify three or more ports that are not monotonically
+increasing or decreasing with a small stepsize (e.g. 1024,1025,1026)
+to avoid accidentally triggering
+the rule by a portscan.
+.PP
+Specifying the inter-knock timeout with \fB--time\fP is mandatory in TCP mode,
+to avoid permanent denial of services by clogging up the peer knock-state tracking table
+that xt_pknock internally keeps, should there be a DDoS on the
+first-in-row knock port from more hostile IP addresses than what the actual size
+of this table is (defaults to 16, can be changed via the "peer_hasht_ents" module parameter).
+It is also wise to use as short a time as possible (1 second) for \fB--time\fP
+for this very reason. You may also consider increasing the size
+of the peer knock-state tracking table. Using \fB--strict\fP also helps,
+as it requires the knock sequence to be exact. This means that if the
+hostile client sends more knocks to the same port, xt_pknock will
+mark such attempt as failed knock sequence and will forget it immediately.
+To completely thwart this kind of DDoS, knock-ports would need to have
+an additional rate-limit protection. Or you may consider using UDP mode.
+.PP
+\fBUDP mode\fP:
+.PP
+This mode is immune against eavesdropping, replaying and spoofing attacks.
+It is also immune against DDoS attack on the knockport.
+.PP
+For this mode to work, the clock difference on the client and on the server
+must be below 1 minute. Synchronizing time on both ends by means
+of NTP or rdate is strongly suggested.
+.PP
+There is a rate limiter built into xt_pknock which blocks any subsequent
+open attempt in UDP mode should the request arrive within less than one
+minute since the first successful open. This is intentional;
+it thwarts eventual spoofing attacks.
+.PP
+Because the payload value of an UDP knock packet is influenced by client's IP address,
+UDP mode cannot be used across NAT.
+.PP
+For sending UDP "SPA" packets, you may use either \fBknock.sh\fP or
+\fBknock-orig.sh\fP. These may be found in doc/pknock/util.

extensions/libxt_psd.c

@@ -0,0 +1,158 @@
+/*
+  Shared library add-on to iptables to add PSD support
+
+  Copyright (C) 2000,2001 astaro AG
+
+  This file is distributed under the terms of the GNU General Public
+  License (GPL). Copies of the GPL can be obtained from:
+     ftp://prep.ai.mit.edu/pub/gnu/GPL
+
+  2000-05-04 Markus Hennig <hennig@astaro.de> : initial
+  2000-08-18 Dennis Koslowski <koslowski@astaro.de> : first release
+  2000-12-01 Dennis Koslowski <koslowski@astaro.de> : UDP scans detection added
+  2001-02-04 Jan Rekorajski <baggins@pld.org.pl> : converted from target to match
+  2003-03-02 Harald Welte <laforge@netfilter.org>: fix 'storage' bug
+  2008-04-03 Mohd Nawawi <nawawi@tracenetworkcorporation.com>: update to 2.6.24 / 1.4 code
+  2008-06-24 Mohd Nawawi <nawawi@tracenetworkcorporation.com>: update to 2.6.24 / 1.4.1 code
+  2009-08-07 Mohd Nawawi Mohamad Jamili <nawawi@tracenetworkcorporation.com> : ported to xtables-addons
+*/
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <netdb.h>
+#include <string.h>
+#include <stdlib.h>
+#include <syslog.h>
+#include <getopt.h>
+#include <xtables.h>
+#include <linux/netfilter/x_tables.h>
+#include "xt_psd.h"
+
+/* Function which prints out usage message. */
+static void psd_mt_help(void) {
+	printf(
+		"psd match options:\n"
+		" --psd-weight-threshold threshhold  Portscan detection weight threshold\n"
+		" --psd-delay-threshold  delay       Portscan detection delay threshold\n"
+		" --psd-lo-ports-weight  lo          Privileged ports weight\n"
+		" --psd-hi-ports-weight  hi          High ports weight\n\n");
+}
+
+static const struct option psd_mt_opts[] = {
+	{.name = "psd-weight-threshold", .has_arg = true, .val = '1'},
+	{.name = "psd-delay-threshold", .has_arg = true, .val = '2'},
+	{.name = "psd-lo-ports-weight", .has_arg = true, .val = '3'},
+	{.name = "psd-hi-ports-weight", .has_arg = true, .val = '4'},
+	{NULL}
+};
+
+/* Initialize the target. */
+static void psd_mt_init(struct xt_entry_match *match) {
+	struct xt_psd_info *psdinfo = (struct xt_psd_info *)match->data;
+	psdinfo->weight_threshold = SCAN_WEIGHT_THRESHOLD;
+	psdinfo->delay_threshold = SCAN_DELAY_THRESHOLD;
+	psdinfo->lo_ports_weight = PORT_WEIGHT_PRIV;
+	psdinfo->hi_ports_weight = PORT_WEIGHT_HIGH;
+}
+
+#define XT_PSD_OPT_CTRESH 0x01
+#define XT_PSD_OPT_DTRESH 0x02
+#define XT_PSD_OPT_LPWEIGHT 0x04
+#define XT_PSD_OPT_HPWEIGHT 0x08
+
+static int psd_mt_parse(int c, char **argv, int invert, unsigned int *flags,
+                     const void *entry, struct xt_entry_match **match)
+{
+	struct xt_psd_info *psdinfo = (struct xt_psd_info *)(*match)->data;
+	unsigned int num;
+
+	switch (c) {
+		/* PSD-weight-threshold */
+		case '1':
+			if (*flags & XT_PSD_OPT_CTRESH)
+				xtables_error(PARAMETER_PROBLEM,"Can't specify --psd-weight-threshold twice");
+			if (!xtables_strtoui(optarg, NULL, &num, 0, PSD_MAX_RATE))
+				xtables_error(PARAMETER_PROBLEM, "bad --psd-weight-threshold '%s'", optarg);
+			psdinfo->weight_threshold = num;
+			*flags |= XT_PSD_OPT_CTRESH;
+			return true;
+
+		/* PSD-delay-threshold */
+		case '2':
+			if (*flags & XT_PSD_OPT_DTRESH)
+				xtables_error(PARAMETER_PROBLEM, "Can't specify --psd-delay-threshold twice");
+			if (!xtables_strtoui(optarg, NULL, &num, 0, PSD_MAX_RATE))
+				xtables_error(PARAMETER_PROBLEM, "bad --psd-delay-threshold '%s'", optarg);
+			psdinfo->delay_threshold = num;
+			*flags |= XT_PSD_OPT_DTRESH;
+			return true;
+
+		/* PSD-lo-ports-weight */
+		case '3':
+			if (*flags & XT_PSD_OPT_LPWEIGHT)
+				xtables_error(PARAMETER_PROBLEM, "Can't specify --psd-lo-ports-weight twice");
+			if (!xtables_strtoui(optarg, NULL, &num, 0, PSD_MAX_RATE))
+				xtables_error(PARAMETER_PROBLEM, "bad --psd-lo-ports-weight '%s'", optarg);
+			psdinfo->lo_ports_weight = num;
+			*flags |= XT_PSD_OPT_LPWEIGHT;
+			return true;
+
+		/* PSD-hi-ports-weight */
+		case '4':
+			if (*flags & XT_PSD_OPT_HPWEIGHT)
+				xtables_error(PARAMETER_PROBLEM, "Can't specify --psd-hi-ports-weight twice");
+			if (!xtables_strtoui(optarg, NULL, &num, 0, PSD_MAX_RATE))
+				xtables_error(PARAMETER_PROBLEM, "bad --psd-hi-ports-weight '%s'", optarg);
+			psdinfo->hi_ports_weight = num;
+			*flags |= XT_PSD_OPT_HPWEIGHT;
+			return true;
+	}
+	return false;
+}
+
+/* Final check; nothing. */
+static void psd_mt_final_check(unsigned int flags) {}
+
+/* Prints out the targinfo. */
+static void psd_mt_print(const void *ip, const struct xt_entry_match *match, int numeric)
+{
+	const struct xt_psd_info *psdinfo = (const struct xt_psd_info *)match->data;
+	printf("psd ");
+	printf("weight-threshold: %u ", psdinfo->weight_threshold);
+	printf("delay-threshold: %u ", psdinfo->delay_threshold);
+	printf("lo-ports-weight: %u ", psdinfo->lo_ports_weight);
+	printf("hi-ports-weight: %u ", psdinfo->hi_ports_weight);
+}
+
+/* Saves the union ipt_targinfo in parsable form to stdout. */
+static void psd_mt_save(const void *ip, const struct xt_entry_match *match)
+{
+	const struct xt_psd_info *psdinfo = (const struct xt_psd_info *)match->data;
+	printf("--psd-weight-threshold %u ", psdinfo->weight_threshold);
+	printf("--psd-delay-threshold %u ", psdinfo->delay_threshold);
+	printf("--psd-lo-ports-weight %u ", psdinfo->lo_ports_weight);
+	printf("--psd-hi-ports-weight %u ", psdinfo->hi_ports_weight);
+}
+
+static struct xtables_match psd_mt_reg = {
+	.name			= "psd",
+	.version		= XTABLES_VERSION,
+	.revision   	= 1,
+	.family			= PF_INET,
+	.size			= XT_ALIGN(sizeof(struct xt_psd_info)),
+	.userspacesize	= XT_ALIGN(sizeof(struct xt_psd_info)),
+	.help			= psd_mt_help,
+	.init			= psd_mt_init,
+	.parse			= psd_mt_parse,
+	.final_check	= psd_mt_final_check,
+	.print			= psd_mt_print,
+	.save			= psd_mt_save,
+	.extra_opts		= psd_mt_opts,
+};
+
+static __attribute__((constructor)) void psd_mt_ldr(void)
+{
+	xtables_register_match(&psd_mt_reg);
+}
+

extensions/libxt_psd.man

@@ -0,0 +1,18 @@
+Attempt to detect TCP and UDP port scans. This match was derived from
+Solar Designer's scanlogd.
+.TP
+\fB\-\-psd\-weight\-threshold\fP \fIthreshold\fP
+Total weight of the latest TCP/UDP packets with different
+destination ports coming from the same host to be treated as port
+scan sequence.
+.TP
+\fB\-\-psd\-delay\-threshold\fP \fIdelay\fP
+Delay (in hundredths of second) for the packets with different
+destination ports coming from the same host to be treated as
+possible port scan subsequence.
+.TP
+\fB\-\-psd\-lo\-ports\-weight\fP \fIweight\fP
+Weight of the packet with privileged (<=1024) destination port.
+.TP
+\fB\-\-psd\-hi\-ports\-weight\fP \fIweight\fP
+Weight of the packet with non-priviliged destination port.

extensions/libxt_quota2.c

@@ -121,7 +121,7 @@ static void quota_mt2_print(const void *ip, const struct xt_entry_match *match,
 
 static struct xtables_match quota_mt2_reg = {
 	.family        = AF_UNSPEC,
-	.revision      = 2,
+	.revision      = 3,
 	.name          = "quota2",
 	.version       = XTABLES_VERSION,
 	.size          = XT_ALIGN(sizeof (struct xt_quota_mtinfo2)),

extensions/libxt_quota2.man

@@ -7,25 +7,25 @@ When counting down from the initial quota, the counter will stop at 0 and
 the match will return false, just like the original "quota" match. In growing
 (upcounting) mode, it will always return true.
 .TP
-\fB--grow\fP
+\fB\-\-grow\fP
 Count upwards instead of downwards.
 .TP
-\fB--name\fP \fIname\fP
+\fB\-\-name\fP \fIname\fP
 Assign the counter a specific name. This option must be present, as an empty
 name is not allowed. Names starting with a dot or names containing a slash are
 prohibited.
 .TP
-[\fB!\fP] \fB--quota\fP \fIiq\fP
+[\fB!\fP] \fB\-\-quota\fP \fIiq\fP
 Specify the initial quota for this counter. If the counter already exists,
 it is not reset. An "!" may be used to invert the result of the match. The
-negation has no effect when \fB--grow\fP is used.
+negation has no effect when \fB\-\-grow\fP is used.
 .TP
-\fB--packets\fP
+\fB\-\-packets\fP
 Count packets instead of bytes that passed the quota2 match.
 .PP
 Because counters in quota2 can be shared, you can combine them for various
 purposes, for example, a bytebucket filter that only lets as much traffic go
 out as has come in:
 .PP
--A INPUT -p tcp --dport 6881 -m quota --name bt --grow
--A OUTPUT -p tcp --sport 6881 -m quota --name bt
+\-A INPUT \-p tcp \-\-dport 6881 \-m quota \-\-name bt \-\-grow;
+\-A OUTPUT \-p tcp \-\-sport 6881 \-m quota \-\-name bt;

extensions/pknock/.gitignore

@@ -0,0 +1 @@
+/pknlusr

extensions/pknock/Kbuild

@@ -0,0 +1,5 @@
+# -*- Makefile -*-
+
+EXTRA_CFLAGS = -I${src}/..
+
+obj-m += xt_pknock.o

extensions/pknock/Makefile.am

@@ -0,0 +1,5 @@
+# -*- Makefile -*-
+
+include ../../Makefile.extra
+
+noinst_PROGRAMS = pknlusr

extensions/pknock/Mbuild

@@ -0,0 +1,3 @@
+# -*- Makefile -*-
+
+obj-${build_pknock}      += libxt_pknock.so

extensions/pknock/libxt_pknock.c

@@ -0,0 +1,343 @@
+/*
+ * Shared library add-on to iptables to add Port Knocking and SPA matching
+ * support.
+ *
+ * (C) 2006-2009 J. Federico Hernandez <fede.hernandez@gmail.com>
+ * (C) 2006 Luis Floreani <luis.floreani@gmail.com>
+ *
+ * This program is released under the terms of GNU GPL version 2.
+ */
+#include <getopt.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <xtables.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include "xt_pknock.h"
+
+static const struct option pknock_mt_opts[] = {
+	/* .name, .has_arg, .flag, .val */
+	{.name = "knockports",  .has_arg = true,  .val = 'k'},
+	{.name = "time",        .has_arg = true,  .val = 't'},
+	{.name = "autoclose",   .has_arg = true,  .val = 'a'},
+	{.name = "name",        .has_arg = true,  .val = 'n'},
+	{.name = "opensecret",  .has_arg = true,  .val = 'o'},
+	{.name = "closesecret", .has_arg = true,  .val = 'z'},
+	{.name = "strict",      .has_arg = false, .val = 'x'},
+	{.name = "checkip",     .has_arg = false, .val = 'c'},
+	{NULL},
+};
+
+static void pknock_mt_help(void)
+{
+	printf("pknock match options:\n"
+		" --knockports port[,port,port,...]	"
+			"Matches destination port(s).\n"
+		" --time seconds\n"
+			"Max allowed time between knocks.\n"
+		" --autoclose minutes\n"
+			"Time after which to automatically close opened\n"
+			"\t\t\t\t\tport(s).\n"
+		" --strict				"
+			"Knocks sequence must be exact.\n"
+		" --name rule_name			"
+			"Rule name.\n"
+		" --checkip				"
+			"Matches if the source ip is in the list.\n"
+		);
+}
+
+static unsigned int
+parse_ports(const char *portstring, uint16_t *ports, const char *proto)
+{
+	char *buffer, *cp, *next;
+	unsigned int i;
+
+	buffer = strdup(portstring);
+	if (buffer == NULL)
+		xtables_error(OTHER_PROBLEM, "strdup failed");
+
+	for (cp = buffer, i = 0; cp != NULL && i < XT_PKNOCK_MAX_PORTS; cp = next, ++i)
+	{
+		next=strchr(cp, ',');
+		if (next != NULL)
+			*next++ = '\0';
+		ports[i] = xtables_parse_port(cp, proto);
+	}
+
+	if (cp != NULL)
+		xtables_error(PARAMETER_PROBLEM, "too many ports specified");
+
+	free(buffer);
+	return i;
+}
+
+static char *
+proto_to_name(uint8_t proto)
+{
+	switch (proto) {
+	case IPPROTO_TCP:
+		return "tcp";
+	case IPPROTO_UDP:
+		return "udp";
+	default:
+		return NULL;
+	}
+}
+
+static const char *
+check_proto(uint16_t pnum, uint8_t invflags)
+{
+	char *proto;
+
+	if (invflags & XT_INV_PROTO)
+		xtables_error(PARAMETER_PROBLEM, PKNOCK "only works with TCP and UDP.");
+
+	if ((proto = proto_to_name(pnum)) != NULL)
+		return proto;
+	else if (pnum == 0)
+		xtables_error(PARAMETER_PROBLEM, PKNOCK "needs `-p tcp' or `-p udp'");
+	else
+		xtables_error(PARAMETER_PROBLEM, PKNOCK "only works with TCP and UDP.");
+}
+
+static int
+__pknock_parse(int c, char **argv, int invert, unsigned int *flags,
+		struct xt_entry_match **match, uint16_t pnum,
+		uint16_t invflags)
+{
+	const char *proto;
+	struct xt_pknock_mtinfo *info = (void *)(*match)->data;
+	unsigned int tmp;
+
+	switch (c) {
+	case 'k': /* --knockports */
+		if (*flags & XT_PKNOCK_KNOCKPORT)
+			xtables_error(PARAMETER_PROBLEM, PKNOCK
+				"cannot use --knockports twice.\n");
+		proto = check_proto(pnum, invflags);
+
+		info->ports_count = parse_ports(optarg, info->port, proto);
+		info->option |= XT_PKNOCK_KNOCKPORT;
+		*flags |= XT_PKNOCK_KNOCKPORT;
+#if DEBUG
+		printf("ports_count: %d\n", info->ports_count);
+#endif
+		break;
+
+	case 't': /* --time */
+		if (*flags & XT_PKNOCK_TIME)
+			xtables_error(PARAMETER_PROBLEM, PKNOCK
+				"cannot use --time twice.\n");
+		info->max_time = atoi(optarg);
+		if (info->max_time == 0)
+			xtables_error(PARAMETER_PROBLEM, PKNOCK
+				"--time number must be > 0.\n");
+		info->option |= XT_PKNOCK_TIME;
+		*flags |= XT_PKNOCK_TIME;
+		break;
+
+        case 'a': /* --autoclose */
+		if (*flags & XT_PKNOCK_AUTOCLOSE)
+			xtables_error(PARAMETER_PROBLEM, PKNOCK
+				"cannot use --autoclose twice.\n");
+		if (!xtables_strtoui(optarg, NULL, &tmp, 0, ~0U))
+			xtables_param_act(XTF_BAD_VALUE, PKNOCK,
+				"--autoclose", optarg);
+                info->autoclose_time = tmp;
+                info->option |= XT_PKNOCK_AUTOCLOSE;
+                *flags |= XT_PKNOCK_AUTOCLOSE;
+                break;
+
+	case 'n': /* --name */
+		if (*flags & XT_PKNOCK_NAME)
+			xtables_error(PARAMETER_PROBLEM, PKNOCK
+				"cannot use --name twice.\n");
+		memset(info->rule_name, 0, sizeof(info->rule_name));
+		strncpy(info->rule_name, optarg, sizeof(info->rule_name) - 1);
+
+		info->rule_name_len = strlen(info->rule_name);
+		info->option |= XT_PKNOCK_NAME;
+		*flags |= XT_PKNOCK_NAME;
+#if DEBUG
+		printf("info->rule_name: %s\n", info->rule_name);
+#endif
+		break;
+
+	case 'o': /* --opensecret */
+		if (*flags & XT_PKNOCK_OPENSECRET)
+			xtables_error(PARAMETER_PROBLEM, PKNOCK
+				"cannot use --opensecret twice.\n");
+		memset(info->open_secret, 0, sizeof(info->open_secret));
+		strncpy(info->open_secret, optarg, sizeof(info->open_secret) - 1);
+
+		info->open_secret_len = strlen(info->open_secret);
+		info->option |= XT_PKNOCK_OPENSECRET;
+		*flags |= XT_PKNOCK_OPENSECRET;
+		break;
+
+	case 'z': /* --closesecret */
+		if (*flags & XT_PKNOCK_CLOSESECRET)
+			xtables_error(PARAMETER_PROBLEM, PKNOCK
+				"cannot use --closesecret twice.\n");
+		memset(info->close_secret, 0, sizeof(info->close_secret));
+		strncpy(info->close_secret, optarg, sizeof(info->close_secret) - 1);
+
+		info->close_secret_len = strlen(info->close_secret);
+		info->option |= XT_PKNOCK_CLOSESECRET;
+		*flags |= XT_PKNOCK_CLOSESECRET;
+		break;
+
+	case 'c': /* --checkip */
+		if (*flags & XT_PKNOCK_CHECKIP)
+			xtables_error(PARAMETER_PROBLEM, PKNOCK
+				"cannot use --checkip twice.\n");
+		info->option |= XT_PKNOCK_CHECKIP;
+		*flags |= XT_PKNOCK_CHECKIP;
+		break;
+
+	case 'x': /* --strict */
+		if (*flags & XT_PKNOCK_STRICT)
+			xtables_error(PARAMETER_PROBLEM, PKNOCK
+				"cannot use --strict twice.\n");
+		info->option |= XT_PKNOCK_STRICT;
+		*flags |= XT_PKNOCK_STRICT;
+		break;
+
+	default:
+		return 0;
+	}
+
+	if (invert)
+		xtables_error(PARAMETER_PROBLEM, PKNOCK "does not support invert.");
+
+	return 1;
+}
+
+static int pknock_mt_parse(int c, char **argv, int invert, unsigned int *flags,
+                		const void *e, struct xt_entry_match **match)
+{
+	const struct ipt_entry *entry = e;
+	return __pknock_parse(c, argv, invert, flags, match,
+			entry->ip.proto, entry->ip.invflags);
+}
+
+static void pknock_mt_check(unsigned int flags)
+{
+	if (!(flags & XT_PKNOCK_NAME))
+		xtables_error(PARAMETER_PROBLEM, PKNOCK
+			"--name option is required.\n");
+
+	if (flags & XT_PKNOCK_KNOCKPORT) {
+		if (flags & XT_PKNOCK_CHECKIP)
+			xtables_error(PARAMETER_PROBLEM, PKNOCK
+				"cannot specify --knockports with --checkip.\n");
+		if ((flags & XT_PKNOCK_OPENSECRET)
+			&& !(flags & XT_PKNOCK_CLOSESECRET))
+			xtables_error(PARAMETER_PROBLEM, PKNOCK
+				"--opensecret must go with --closesecret.\n");
+		if ((flags & XT_PKNOCK_CLOSESECRET)
+			&& !(flags & XT_PKNOCK_OPENSECRET))
+			xtables_error(PARAMETER_PROBLEM, PKNOCK
+				"--closesecret must go with --opensecret.\n");
+	}
+
+	if (flags & XT_PKNOCK_CHECKIP) {
+		if (flags & XT_PKNOCK_KNOCKPORT)
+			xtables_error(PARAMETER_PROBLEM, PKNOCK
+				"cannot specify --checkip with --knockports.\n");
+		if ((flags & XT_PKNOCK_OPENSECRET)
+			|| (flags & XT_PKNOCK_CLOSESECRET))
+			xtables_error(PARAMETER_PROBLEM, PKNOCK
+				"cannot specify --opensecret and"
+				" --closesecret with --checkip.\n");
+		if (flags & XT_PKNOCK_TIME)
+			xtables_error(PARAMETER_PROBLEM, PKNOCK
+				"cannot specify --time with --checkip.\n");
+		if (flags & XT_PKNOCK_AUTOCLOSE)
+			xtables_error(PARAMETER_PROBLEM, PKNOCK
+				"cannot specify --autoclose with --checkip.\n");
+	} else if (!(flags & (XT_PKNOCK_OPENSECRET | XT_PKNOCK_TIME))) {
+		xtables_error(PARAMETER_PROBLEM, PKNOCK
+			"you must specify --time.\n");
+	}
+}
+
+static void pknock_mt_print(const void *ip,
+						const struct xt_entry_match *match, int numeric)
+{
+	const struct xt_pknock_mtinfo *info = (void *)match->data;
+	int i;
+
+	printf("pknock ");
+	if (info->option & XT_PKNOCK_KNOCKPORT) {
+		printf("knockports ");
+		for (i = 0; i < info->ports_count; ++i)
+			printf("%s%d", i ? "," : "", info->port[i]);
+		printf(" ");
+	}
+	if (info->option & XT_PKNOCK_TIME)
+		printf("time %ld ", (long)info->max_time);
+	if (info->option & XT_PKNOCK_AUTOCLOSE)
+		printf("autoclose %lu ", (unsigned long)info->autoclose_time);
+	if (info->option & XT_PKNOCK_NAME)
+		printf("name %s ", info->rule_name);
+	if (info->option & XT_PKNOCK_OPENSECRET)
+		printf("opensecret ");
+	if (info->option & XT_PKNOCK_CLOSESECRET)
+		printf("closesecret ");
+	if (info->option & XT_PKNOCK_STRICT)
+		printf("strict ");
+	if (info->option & XT_PKNOCK_CHECKIP)
+		printf("checkip ");
+}
+
+static void pknock_mt_save(const void *ip, const struct xt_entry_match *match)
+{
+	int i;
+	const struct xt_pknock_mtinfo *info = (void *)match->data;
+
+	if (info->option & XT_PKNOCK_KNOCKPORT) {
+		printf("--knockports ");
+		for (i = 0; i < info->ports_count; ++i)
+			printf("%s%d", i ? "," : "", info->port[i]);
+		printf(" ");
+	}
+	if (info->option & XT_PKNOCK_TIME)
+		printf("--time %ld ", (long)info->max_time);
+	if (info->option & XT_PKNOCK_AUTOCLOSE)
+		printf("--autoclose %lu ",
+		       (unsigned long)info->autoclose_time);
+	if (info->option & XT_PKNOCK_NAME)
+		printf("--name %s ", info->rule_name);
+	if (info->option & XT_PKNOCK_OPENSECRET)
+		printf("--opensecret ");
+	if (info->option & XT_PKNOCK_CLOSESECRET)
+		printf("--closesecret ");
+	if (info->option & XT_PKNOCK_STRICT)
+		printf("--strict ");
+	if (info->option & XT_PKNOCK_CHECKIP)
+		printf("--checkip ");
+}
+
+static struct xtables_match pknock_mt_reg = {
+	.name		= "pknock",
+	.version	= XTABLES_VERSION,
+	.revision      = 1,
+	.family		= AF_INET,
+	.size          = XT_ALIGN(sizeof(struct xt_pknock_mtinfo)),
+	.userspacesize = XT_ALIGN(sizeof(struct xt_pknock_mtinfo)),
+	.help          = pknock_mt_help,
+	.parse         = pknock_mt_parse,
+	.final_check   = pknock_mt_check,
+	.print         = pknock_mt_print,
+	.save          = pknock_mt_save,
+	.extra_opts    = pknock_mt_opts,
+};
+
+static __attribute__((constructor)) void pknock_mt_ldr(void)
+{
+	xtables_register_match(&pknock_mt_reg);
+}

extensions/pknock/pknlusr.c

@@ -0,0 +1,93 @@
+#include <sys/socket.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <arpa/inet.h>
+#include <linux/netlink.h>
+#include <linux/connector.h>
+
+#include "xt_pknock.h"
+
+#define GROUP 1
+
+static struct sockaddr_nl src_addr, dest_addr;
+static struct msghdr msg;
+static int sock_fd;
+
+static unsigned char *buf;
+
+static struct xt_pknock_nl_msg *nlmsg;
+
+int main(void)
+{
+	socklen_t addrlen;
+	int status;
+	int group = GROUP;
+	struct cn_msg *cnmsg;
+
+	int i, buf_size;
+
+	const char *ip;
+	char ipbuf[48];
+
+	sock_fd = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR);
+
+	if (sock_fd == -1) {
+		perror("socket()");
+		return 1;
+	}
+
+	memset(&src_addr, 0, sizeof(src_addr));
+	src_addr.nl_family = AF_NETLINK;
+	src_addr.nl_pid = getpid();
+	src_addr.nl_groups = group;
+
+	status = bind(sock_fd, (struct sockaddr*)&src_addr, sizeof(src_addr));
+
+	if (status == -1) {
+		close(sock_fd);
+		perror("bind()");
+		return 1;
+	}
+
+	memset(&dest_addr, 0, sizeof(dest_addr));
+	dest_addr.nl_family = AF_NETLINK;
+	dest_addr.nl_pid = 0;
+	dest_addr.nl_groups = group;
+
+	buf_size = sizeof(struct xt_pknock_nl_msg) + sizeof(struct cn_msg) + sizeof(struct nlmsghdr);
+	buf = malloc(buf_size);
+
+	if (!buf) {
+		perror("malloc()");
+		return 1;
+	}
+
+	addrlen = sizeof(dest_addr);
+
+	while(1) {
+
+		memset(buf, 0, buf_size);
+
+		status = recvfrom(sock_fd, buf, buf_size, 0, (struct sockaddr *)&dest_addr, &addrlen);
+
+		if (status <= 0) {
+			perror("recvfrom()");
+			return 1;
+		}
+
+	nlmsg = (struct xt_pknock_nl_msg *) (buf + sizeof(struct cn_msg) + sizeof(struct nlmsghdr));
+
+		ip = inet_ntop(AF_INET, &nlmsg->peer_ip, ipbuf, sizeof(ipbuf));
+		printf("rule_name: %s - ip %s\n", nlmsg->rule_name, ip);
+
+	}
+
+	close(sock_fd);
+
+	free(buf);
+
+	return 0;
+}

extensions/pknock/xt_pknock.Kconfig

@@ -0,0 +1,13 @@
+config NETFILTER_XT_MATCH_PKNOCK
+	tristate "Port knocking match support"
+	depends on NETFILTER_XTABLES && CONNECTOR
+	---help---
+	pknock match implements so-called Port Knocking, a stealthy system
+	for network authentication: client sends packets to selected, closed
+	ports on target machine in a specific sequence. The target machine
+	(which has pknock match rule set up) then decides whether to
+	unblock or block (again) its protected port with listening
+	service. This can be, for instance, used to avoid brute force attacks
+	on ssh or ftp services.
+
+	For more informations go to: http://portknocko.berlios.de/

extensions/pknock/xt_pknock.h

@@ -0,0 +1,53 @@
+/*
+ * Kernel module to implement Port Knocking and SPA matching support.
+ *
+ * (C) 2006-2008 J. Federico Hernandez <fede.hernandez@gmail.com>
+ * (C) 2006 Luis Floreani <luis.floreani@gmail.com>
+ *
+ * $Id$
+ *
+ * This program is released under the terms of GNU GPL version 2.
+ */
+#ifndef _XT_PKNOCK_H
+#define _XT_PKNOCK_H
+
+#define PKNOCK "xt_pknock: "
+
+enum {
+	XT_PKNOCK_KNOCKPORT   = 1 << 0,
+	XT_PKNOCK_TIME        = 1 << 1,
+	XT_PKNOCK_NAME        = 1 << 2,
+	XT_PKNOCK_STRICT      = 1 << 3,
+	XT_PKNOCK_CHECKIP     = 1 << 4,
+	XT_PKNOCK_OPENSECRET  = 1 << 5,
+	XT_PKNOCK_CLOSESECRET = 1 << 6,
+	XT_PKNOCK_AUTOCLOSE   = 1 << 7,
+
+	/* Can never change these, as they are make up the user protocol. */
+	XT_PKNOCK_MAX_PORTS      = 15,
+	XT_PKNOCK_MAX_BUF_LEN    = 31,
+	XT_PKNOCK_MAX_PASSWD_LEN = 31,
+};
+
+#define DEBUG 1
+
+struct xt_pknock_mtinfo {
+	char rule_name[XT_PKNOCK_MAX_BUF_LEN+1];
+	uint32_t			rule_name_len;
+	char open_secret[XT_PKNOCK_MAX_PASSWD_LEN+1];
+	uint32_t			open_secret_len;
+	char close_secret[XT_PKNOCK_MAX_PASSWD_LEN+1];
+	uint32_t			close_secret_len;
+	uint8_t	option;		/* --time, --knock-port, ... */
+	uint8_t	ports_count;	/* number of ports */
+	uint16_t	port[XT_PKNOCK_MAX_PORTS]; /* port[,port,port,...] */
+	uint32_t	max_time;	/* max matching time between ports */
+	uint32_t autoclose_time;
+};
+
+struct xt_pknock_nl_msg {
+	char rule_name[XT_PKNOCK_MAX_BUF_LEN+1];
+	__be32 peer_ip;
+};
+
+#endif /* _XT_PKNOCK_H */

extensions/xt_DELUDE.c

@@ -119,19 +119,18 @@ static void delude_send_reset(struct sk_buff *oldskb, unsigned int hook)
 		addr_type = RTN_LOCAL;
 
 	/* ip_route_me_harder expects skb->dst to be set */
-	dst_hold(oldskb->dst);
-	nskb->dst = oldskb->dst;
+	skb_dst_set(nskb, dst_clone(skb_dst(oldskb)));
 
 	if (ip_route_me_harder(&nskb, addr_type))
 		goto free_nskb;
 	else
 		niph = ip_hdr(nskb);
 
-	niph->ttl       = dst_metric(nskb->dst, RTAX_HOPLIMIT);
+	niph->ttl       = dst_metric(skb_dst(nskb), RTAX_HOPLIMIT);
 	nskb->ip_summed = CHECKSUM_NONE;
 
 	/* "Never happens" */
-	if (nskb->len > dst_mtu(nskb->dst))
+	if (nskb->len > dst_mtu(skb_dst(nskb)))
 		goto free_nskb;
 
 	nf_ct_attach(nskb, oldskb);

extensions/xt_TARPIT.c

@@ -167,20 +167,20 @@ static void tarpit_tcp(struct sk_buff *oldskb, unsigned int hook)
 	nskb->ip_summed = CHECKSUM_NONE;
 
 	/* Adjust IP TTL */
-	niph->ttl = dst_metric(nskb->dst, RTAX_HOPLIMIT);
+	niph->ttl = dst_metric(skb_dst(nskb), RTAX_HOPLIMIT);
 
 	/* Adjust IP checksum */
 	niph->check = 0;
 	niph->check = ip_fast_csum(skb_network_header(nskb), niph->ihl);
 
 	/* "Never happens" */
-	if (nskb->len > dst_mtu(nskb->dst))
+	if (nskb->len > dst_mtu(skb_dst(nskb)))
 		goto free_nskb;
 
 	nf_ct_attach(nskb, oldskb);
 
-	NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT, nskb, NULL, nskb->dst->dev,
-		dst_output);
+	NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT, nskb, NULL,
+		skb_dst(nskb)->dev, dst_output);
 	return;
 
  free_nskb:
@@ -192,7 +192,7 @@ tarpit_tg(struct sk_buff **pskb, const struct xt_target_param *par)
 {
 	const struct sk_buff *skb = *pskb;
 	const struct iphdr *iph = ip_hdr(skb);
-	const struct rtable *rt = (const void *)skb->dst;
+	const struct rtable *rt = skb_rtable(skb);
 
 	/* Do we have an input route cache entry? (Not in PREROUTING.) */
 	if (rt == NULL)

extensions/xt_TEE.c

@@ -79,9 +79,9 @@ tee_tg_route4(struct sk_buff *skb, const struct xt_tee_tginfo *info)
 		return false;
 	}
 
-	dst_release(skb->dst);
-	skb->dst      = &rt->u.dst;
-	skb->dev      = skb->dst->dev;
+	dst_release(skb_dst(skb));
+	skb_dst_set(skb, &rt->u.dst);
+	skb->dev      = rt->u.dst.dev;
 	skb->protocol = htons(ETH_P_IP);
 	return true;
 }
@@ -104,7 +104,7 @@ static inline bool dev_hh_avail(const struct net_device *dev)
  */
 static void tee_tg_send(struct sk_buff *skb)
 {
-	const struct dst_entry *dst  = skb->dst;
+	const struct dst_entry *dst  = skb_dst(skb);
 	const struct net_device *dev = dst->dev;
 	unsigned int hh_len = LL_RESERVED_SPACE(dev);
 
@@ -175,7 +175,7 @@ tee_tg4(struct sk_buff **pskb, const struct xt_target_param *par)
 	/*
 	 * Copy the skb, and route the copy. Will later return %XT_CONTINUE for
 	 * the original skb, which should continue on its way as if nothing has
-	 * happened. The copy should be independantly delivered to the TEE --gw.
+	 * happened. The copy should be independently delivered to the TEE --gw.
 	 */
 	skb = skb_copy(skb, GFP_ATOMIC);
 	if (skb == NULL) {
@@ -251,9 +251,9 @@ tee_tg_route6(struct sk_buff *skb, const struct xt_tee_tginfo *info)
 		return false;
 	}
 
-	dst_release(skb->dst);
-	skb->dst      = dst;
-	skb->dev      = skb->dst->dev;
+	dst_release(skb_dst(skb));
+	skb_dst_set(skb, dst);
+	skb->dev      = dst->dev;
 	skb->protocol = htons(ETH_P_IPV6);
 	return true;
 }

extensions/xt_condition.c

@@ -55,7 +55,7 @@ struct condition_variable {
 
 /* proc_lock is a user context only semaphore used for write access */
 /*           to the conditions' list.                               */
-static DECLARE_MUTEX(proc_lock);
+static struct semaphore proc_lock;
 
 static LIST_HEAD(conditions_list);
 static struct proc_dir_entry *proc_net_condition;
@@ -232,6 +232,7 @@ static int __init condition_mt_init(void)
 {
 	int ret;
 
+	sema_init(&proc_lock, 1);
 	proc_net_condition = proc_mkdir(dir_name, init_net__proc_net);
 	if (proc_net_condition == NULL)
 		return -EACCES;

extensions/xt_ipp2p.c

@@ -844,7 +844,13 @@ ipp2p_mt(const struct sk_buff *skb, const struct xt_match_param *par)
 		if (tcph->rst) return 0;  /* if RST bit is set bail out */
 
 		haystack += tcph->doff * 4; /* get TCP-Header-Size */
+		if (tcph->doff * 4 > hlen) {
+			if (info->debug)
+				pr_info("TCP header indicated packet larger than it is\n");
+			hlen = 0;
+		} else {
 			hlen -= tcph->doff * 4;
+		}
 		while (matchlist[i].command) {
 			if ((info->cmd & matchlist[i].command) == matchlist[i].command &&
 			    hlen > matchlist[i].packet_len)

extensions/xt_psd.Kconfig

@@ -0,0 +1,6 @@
+config NETFILTER_XT_MATCH_PSD
+	tristate  'psd match support'
+	depends on NETFILTER_XTABLES && NETFILTER_ADVANCED
+	---help---
+	This option adds a `psd' match, which allows you to create rules in
+	any iptables table wich will detect TCP and UDP port scans.

extensions/xt_psd.c

@@ -0,0 +1,335 @@
+/*
+  This is a module which is used for PSD (portscan detection)
+  Derived from scanlogd v2.1 written by Solar Designer <solar@false.com>
+  and LOG target module.
+
+  Copyright (C) 2000,2001 astaro AG
+
+  This file is distributed under the terms of the GNU General Public
+  License (GPL). Copies of the GPL can be obtained from:
+     ftp://prep.ai.mit.edu/pub/gnu/GPL
+
+  2000-05-04 Markus Hennig <hennig@astaro.de> : initial
+  2000-08-18 Dennis Koslowski <koslowski@astaro.de> : first release
+  2000-12-01 Dennis Koslowski <koslowski@astaro.de> : UDP scans detection added
+  2001-01-02 Dennis Koslowski <koslowski@astaro.de> : output modified
+  2001-02-04 Jan Rekorajski <baggins@pld.org.pl> : converted from target to match
+  2004-05-05 Martijn Lievaart <m@rtij.nl> : ported to 2.6
+  2007-04-05 Mohd Nawawi Mohamad Jamili <nawawi@tracenetworkcorporation.com> : ported to 2.6.18
+  2008-03-21 Mohd Nawawi Mohamad Jamili <nawawi@tracenetworkcorporation.com> : ported to 2.6.24
+  2009-08-07 Mohd Nawawi Mohamad Jamili <nawawi@tracenetworkcorporation.com> : ported to xtables-addons
+*/
+
+#define pr_fmt(x) KBUILD_MODNAME ": " x
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <net/tcp.h>
+#include <linux/spinlock.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter/x_tables.h>
+#include "xt_psd.h"
+#include "compat_xtables.h"
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Dennis Koslowski <koslowski@astaro.com>");
+MODULE_AUTHOR("Martijn Lievaart <m@rtij.nl>");
+MODULE_AUTHOR("Jan Rekorajski <baggins@pld.org.pl>");
+MODULE_AUTHOR(" Mohd Nawawi Mohamad Jamili <nawawi@tracenetworkcorporation.com>");
+MODULE_DESCRIPTION("Xtables: PSD - portscan detection");
+MODULE_ALIAS("ipt_psd");
+
+#define HF_DADDR_CHANGING   0x01
+#define HF_SPORT_CHANGING   0x02
+#define HF_TOS_CHANGING	    0x04
+#define HF_TTL_CHANGING	    0x08
+
+/*
+ * Information we keep per each target port
+ */
+struct port {
+	u_int16_t number;      /* port number */
+	u_int8_t proto;        /* protocol number */
+	u_int8_t and_flags;    /* tcp ANDed flags */
+	u_int8_t or_flags;     /* tcp ORed flags */
+};
+
+/*
+ * Information we keep per each source address.
+ */
+struct host {
+	struct host *next;						/* Next entry with the same hash */
+	unsigned long timestamp;					/* Last update time */
+	struct in_addr src_addr;				/* Source address */
+	struct in_addr dest_addr;				/* Destination address */
+	unsigned short src_port;				/* Source port */
+	int count;								/* Number of ports in the list */
+	int weight;								/* Total weight of ports in the list */
+	struct port ports[SCAN_MAX_COUNT - 1];	/* List of ports */
+	unsigned char tos;						/* TOS */
+	unsigned char ttl;						/* TTL */
+	unsigned char flags;					/* HF_ flags bitmask */
+};
+
+/*
+ * State information.
+ */
+static struct {
+	spinlock_t lock;
+	struct host list[LIST_SIZE];	/* List of source addresses */
+	struct host *hash[HASH_SIZE];	/* Hash: pointers into the list */
+	int index;						/* Oldest entry to be replaced */
+} state;
+
+/*
+ * Convert an IP address into a hash table index.
+ */
+static inline int hashfunc(struct in_addr addr)
+{
+	unsigned int value;
+	int hash;
+
+	value = addr.s_addr;
+	hash = 0;
+	do {
+		hash ^= value;
+	} while ((value >>= HASH_LOG) != 0);
+
+	return hash & (HASH_SIZE - 1);
+}
+
+static bool
+xt_psd_match(const struct sk_buff *pskb, const struct xt_match_param *match)
+{
+	const struct iphdr *iph;
+	const struct tcphdr *tcph;
+	struct tcphdr _tcph;
+	struct in_addr addr;
+	u_int16_t src_port,dest_port;
+  	u_int8_t tcp_flags, proto;
+	unsigned long now;
+	struct host *curr, *last, **head;
+	int hash, index, count;
+	/* Parameters from userspace */
+	const struct xt_psd_info *psdinfo = match->matchinfo;
+
+	/* IP header */
+	iph = ip_hdr(pskb);
+
+	/* Sanity check */
+	if (iph->frag_off & htons(IP_OFFSET)) {
+		pr_debug("sanity check failed\n");
+		return false;
+	}
+
+	/* TCP or UDP ? */
+	proto = iph->protocol;
+
+	if (proto != IPPROTO_TCP && proto != IPPROTO_UDP) {
+		pr_debug("protocol not supported\n");
+		return false;
+	}
+
+	/* Get the source address, source & destination ports, and TCP flags */
+
+	addr.s_addr = iph->saddr;
+
+	tcph = skb_header_pointer(pskb, match->thoff, sizeof(_tcph), &_tcph);
+	if (tcph == NULL)
+		return false;
+
+	/* Yep, it's dirty */
+	src_port = tcph->source;
+	dest_port = tcph->dest;
+
+	if (proto == IPPROTO_TCP)
+		tcp_flags = *((u_int8_t*)tcph + 13);
+	else
+		tcp_flags = 0x00;
+
+	/* We're using IP address 0.0.0.0 for a special purpose here, so don't let
+	 * them spoof us. [DHCP needs this feature - HW] */
+	if (addr.s_addr == 0) {
+		pr_debug("spoofed source address (0.0.0.0)\n");
+		return false;
+	}
+
+	/* Use jiffies here not to depend on someone setting the time while we're
+	 * running; we need to be careful with possible return value overflows. */
+	now = jiffies;
+
+	spin_lock(&state.lock);
+
+	/* Do we know this source address already? */
+	count = 0;
+	last = NULL;
+	if ((curr = *(head = &state.hash[hash = hashfunc(addr)])) != NULL)
+		do {
+			if (curr->src_addr.s_addr == addr.s_addr)
+				break;
+			count++;
+			if (curr->next != NULL)
+				last = curr;
+		} while ((curr = curr->next) != NULL);
+
+	if (curr != NULL) {
+
+		/* We know this address, and the entry isn't too old. Update it. */
+		if (now - curr->timestamp <= (psdinfo->delay_threshold*HZ)/100 &&
+		    time_after_eq(now, curr->timestamp)) {
+
+			/* Just update the appropriate list entry if we've seen this port already */
+			for (index = 0; index < curr->count; index++) {
+				if (curr->ports[index].number == dest_port) {
+					curr->ports[index].proto = proto;
+					curr->ports[index].and_flags &= tcp_flags;
+					curr->ports[index].or_flags |= tcp_flags;
+					goto out_no_match;
+				}
+			}
+
+			/* TCP/ACK and/or TCP/RST to a new port? This could be an outgoing connection. */
+			if (proto == IPPROTO_TCP && (tcph->ack || tcph->rst))
+				goto out_no_match;
+
+			/* Packet to a new port, and not TCP/ACK: update the timestamp */
+			curr->timestamp = now;
+
+			/* Logged this scan already? Then drop the packet. */
+			if (curr->weight >= psdinfo->weight_threshold)
+				goto out_match;
+
+			/* Specify if destination address, source port, TOS or TTL are not fixed */
+			if (curr->dest_addr.s_addr != iph->daddr)
+				curr->flags |= HF_DADDR_CHANGING;
+			if (curr->src_port != src_port)
+				curr->flags |= HF_SPORT_CHANGING;
+			if (curr->tos != iph->tos)
+				curr->flags |= HF_TOS_CHANGING;
+			if (curr->ttl != iph->ttl)
+				curr->flags |= HF_TTL_CHANGING;
+
+			/* Update the total weight */
+			curr->weight += (ntohs(dest_port) < 1024) ?
+				psdinfo->lo_ports_weight : psdinfo->hi_ports_weight;
+
+			/* Got enough destination ports to decide that this is a scan? */
+			/* Then log it and drop the packet. */
+			if (curr->weight >= psdinfo->weight_threshold)
+				goto out_match;
+
+			/* Remember the new port */
+			if (curr->count < SCAN_MAX_COUNT) {
+				curr->ports[curr->count].number = dest_port;
+				curr->ports[curr->count].proto = proto;
+				curr->ports[curr->count].and_flags = tcp_flags;
+				curr->ports[curr->count].or_flags = tcp_flags;
+				curr->count++;
+			}
+
+			goto out_no_match;
+		}
+
+		/* We know this address, but the entry is outdated. Mark it unused, and
+		 * remove from the hash table. We'll allocate a new entry instead since
+		 * this one might get re-used too soon. */
+		curr->src_addr.s_addr = 0;
+		if (last != NULL)
+			last->next = last->next->next;
+		else if (*head != NULL)
+			*head = (*head)->next;
+		last = NULL;
+	}
+
+	/* We don't need an ACK from a new source address */
+	if (proto == IPPROTO_TCP && tcph->ack)
+		goto out_no_match;
+
+	/* Got too many source addresses with the same hash value? Then remove the
+	 * oldest one from the hash table, so that they can't take too much of our
+	 * CPU time even with carefully chosen spoofed IP addresses. */
+	if (count >= HASH_MAX && last != NULL)
+		last->next = NULL;
+
+	/* We're going to re-use the oldest list entry, so remove it from the hash
+	 * table first (if it is really already in use, and isn't removed from the
+	 * hash table already because of the HASH_MAX check above). */
+
+	/* First, find it */
+	if (state.list[state.index].src_addr.s_addr != 0)
+		head = &state.hash[hashfunc(state.list[state.index].src_addr)];
+	else
+		head = &last;
+	last = NULL;
+	if ((curr = *head) != NULL)
+		do {
+			if (curr == &state.list[state.index])
+				break;
+			last = curr;
+		} while ((curr = curr->next) != NULL);
+
+	/* Then, remove it */
+	if (curr != NULL) {
+		if (last != NULL)
+			last->next = last->next->next;
+		else if (*head != NULL)
+			*head = (*head)->next;
+	}
+
+	/* Get our list entry */
+	curr = &state.list[state.index++];
+	if (state.index >= LIST_SIZE)
+		state.index = 0;
+
+	/* Link it into the hash table */
+	head = &state.hash[hash];
+	curr->next = *head;
+	*head = curr;
+
+	/* And fill in the fields */
+	curr->timestamp = now;
+	curr->src_addr = addr;
+	curr->dest_addr.s_addr = iph->daddr;
+	curr->src_port = src_port;
+	curr->count = 1;
+	curr->weight = (ntohs(dest_port) < 1024) ? psdinfo->lo_ports_weight : psdinfo->hi_ports_weight;
+	curr->ports[0].number = dest_port;
+	curr->ports[0].proto = proto;
+	curr->ports[0].and_flags = tcp_flags;
+	curr->ports[0].or_flags = tcp_flags;
+	curr->tos = iph->tos;
+	curr->ttl = iph->ttl;
+
+out_no_match:
+	spin_unlock(&state.lock);
+	return false;
+
+out_match:
+	spin_unlock(&state.lock);
+	return true;
+}
+
+static struct xt_match xt_psd_reg __read_mostly = {
+	.name		= "psd",
+    .family		= AF_INET,
+	.revision  = 1,
+	.match		= xt_psd_match,
+	.matchsize	= sizeof(struct xt_psd_info),
+	.me			= THIS_MODULE,
+};
+
+static int __init xt_psd_init(void)
+{
+	spin_lock_init(&(state.lock));
+	return xt_register_match(&xt_psd_reg);
+}
+
+static void __exit xt_psd_exit(void)
+{
+        xt_unregister_match(&xt_psd_reg);
+}
+
+module_init(xt_psd_init);
+module_exit(xt_psd_exit);
+

extensions/xt_psd.h

@@ -0,0 +1,41 @@
+#ifndef _LINUX_NETFILTER_XT_PSD_H
+#define _LINUX_NETFILTER_XT_PSD_H 1
+
+#include <linux/param.h>
+#include <linux/types.h>
+
+/*
+ * High port numbers have a lower weight to reduce the frequency of false
+ * positives, such as from passive mode FTP transfers.
+ */
+#define PORT_WEIGHT_PRIV		3
+#define PORT_WEIGHT_HIGH		1
+#define	PSD_MAX_RATE			10000
+
+/*
+ * Port scan detection thresholds: at least COUNT ports need to be scanned
+ * from the same source, with no longer than DELAY ticks between ports.
+ */
+#define SCAN_MIN_COUNT			7
+#define SCAN_MAX_COUNT			(SCAN_MIN_COUNT * PORT_WEIGHT_PRIV)
+#define SCAN_WEIGHT_THRESHOLD		SCAN_MAX_COUNT
+#define SCAN_DELAY_THRESHOLD		(300) /* old usage of HZ here was erroneously and broke under uml */
+
+/*
+ * Keep track of up to LIST_SIZE source addresses, using a hash table of
+ * HASH_SIZE entries for faster lookups, but limiting hash collisions to
+ * HASH_MAX source addresses per the same hash value.
+ */
+#define LIST_SIZE			0x100
+#define HASH_LOG			9
+#define HASH_SIZE			(1 << HASH_LOG)
+#define HASH_MAX			0x10
+
+struct xt_psd_info {
+	__u32 weight_threshold;
+	__u32 delay_threshold;
+	__u16 lo_ports_weight;
+	__u16 hi_ports_weight;
+};
+
+#endif /*_LINUX_NETFILTER_XT_PSD_H*/

extensions/xt_quota2.c

@@ -21,12 +21,15 @@
 #include "xt_quota2.h"
 #include "compat_xtables.h"
 
-struct quota_counter {
+/**
+ * @lock:	lock to protect quota writers from each other
+ */
+struct xt_quota_counter {
 	u_int64_t quota;
 	spinlock_t lock;
 	struct list_head list;
 	atomic_t ref;
-	char name[XT_QUOTA_COUNTER_NAME_LENGTH];
+	char name[sizeof(((struct xt_quota_mtinfo2 *)NULL)->name)];
 	struct proc_dir_entry *procfs_entry;
 };
 
@@ -44,7 +47,7 @@ module_param_named(gid, quota_list_gid, uint, S_IRUGO | S_IWUSR);
 static int quota_proc_read(char *page, char **start, off_t offset,
                            int count, int *eof, void *data)
 {
-	struct quota_counter *e = data;
+	struct xt_quota_counter *e = data;
 	int ret;
 
 	spin_lock_bh(&e->lock);
@@ -56,7 +59,7 @@ static int quota_proc_read(char *page, char **start, off_t offset,
 static int quota_proc_write(struct file *file, const char __user *input,
                             unsigned long size, void *data)
 {
-	struct quota_counter *e = data;
+	struct xt_quota_counter *e = data;
 	char buf[sizeof("18446744073709551616")];
 
 	if (size > sizeof(buf))
@@ -66,39 +69,58 @@ static int quota_proc_write(struct file *file, const char __user *input,
 	buf[sizeof(buf)-1] = '\0';
 
 	spin_lock_bh(&e->lock);
-	e->quota = simple_strtoul(buf, NULL, 0);
+	e->quota = simple_strtoull(buf, NULL, 0);
 	spin_unlock_bh(&e->lock);
 	return size;
 }
 
+static struct xt_quota_counter *
+q2_new_counter(const struct xt_quota_mtinfo2 *q, bool anon)
+{
+	struct xt_quota_counter *e;
+	unsigned int size;
+
+	/* Do not need all the procfs things for anonymous counters. */
+	size = anon ? offsetof(typeof(*e), list) : sizeof(*e);
+	e = kmalloc(size, GFP_KERNEL);
+	if (e == NULL)
+		return NULL;
+
+	e->quota = q->quota;
+	spin_lock_init(&e->lock);
+	if (!anon) {
+		INIT_LIST_HEAD(&e->list);
+		atomic_set(&e->ref, 1);
+		strncpy(e->name, q->name, sizeof(e->name));
+	}
+	return e;
+}
+
 /**
  * q2_get_counter - get ref to counter or create new
  * @name:	name of counter
  */
-static struct quota_counter *q2_get_counter(const struct xt_quota_mtinfo2 *q)
+static struct xt_quota_counter *
+q2_get_counter(const struct xt_quota_mtinfo2 *q)
 {
 	struct proc_dir_entry *p;
-	struct quota_counter *e;
+	struct xt_quota_counter *e;
+
+	if (*q->name == '\0')
+		return q2_new_counter(q, true);
 
 	spin_lock_bh(&counter_list_lock);
-	list_for_each_entry(e, &counter_list, list) {
+	list_for_each_entry(e, &counter_list, list)
 		if (strcmp(e->name, q->name) == 0) {
 			atomic_inc(&e->ref);
 			spin_unlock_bh(&counter_list_lock);
 			return e;
 		}
-	}
 
-	e = kmalloc(sizeof(struct quota_counter), GFP_KERNEL);
+	e = q2_new_counter(q, false);
 	if (e == NULL)
 		goto out;
 
-	e->quota = q->quota;
-	spin_lock_init(&e->lock);
-	INIT_LIST_HEAD(&e->list);
-	atomic_set(&e->ref, 1);
-	strncpy(e->name, q->name, sizeof(e->name));
-
 	p = e->procfs_entry = create_proc_entry(e->name, quota_list_perms,
 	                      proc_xt_quota);
 	if (p == NULL || IS_ERR(p))
@@ -130,15 +152,16 @@ static bool quota_mt2_check(const struct xt_mtchk_param *par)
 		return false;
 
 	q->name[sizeof(q->name)-1] = '\0';
-	if (*q->name == '\0' || *q->name == '.' ||
-	    strchr(q->name, '/') != NULL) {
-		printk(KERN_ERR "xt_quota.2: illegal name\n");
+	if (*q->name == '.' || strchr(q->name, '/') != NULL) {
+		printk(KERN_ERR "xt_quota<%u>: illegal name\n",
+		       par->match->revision);
 		return false;
 	}
 
 	q->master = q2_get_counter(q);
 	if (q->master == NULL) {
-		printk(KERN_ERR "xt_quota.2: memory alloc failure\n");
+		printk(KERN_ERR "xt_quota<%u>: memory alloc failure\n",
+		       par->match->revision);
 		return false;
 	}
 
@@ -148,7 +171,12 @@ static bool quota_mt2_check(const struct xt_mtchk_param *par)
 static void quota_mt2_destroy(const struct xt_mtdtor_param *par)
 {
 	struct xt_quota_mtinfo2 *q = par->matchinfo;
-	struct quota_counter *e = q->master;
+	struct xt_quota_counter *e = q->master;
+
+	if (*q->name == '\0') {
+		kfree(e);
+		return;
+	}
 
 	spin_lock_bh(&counter_list_lock);
 	if (!atomic_dec_and_test(&e->ref)) {
@@ -157,8 +185,8 @@ static void quota_mt2_destroy(const struct xt_mtdtor_param *par)
 	}
 
 	list_del(&e->list);
-	spin_unlock_bh(&counter_list_lock);
 	remove_proc_entry(e->name, proc_xt_quota);
+	spin_unlock_bh(&counter_list_lock);
 	kfree(e);
 }
 
@@ -166,17 +194,15 @@ static bool
 quota_mt2(const struct sk_buff *skb, const struct xt_match_param *par)
 {
 	struct xt_quota_mtinfo2 *q = (void *)par->matchinfo;
-	struct quota_counter *e = q->master;
+	struct xt_quota_counter *e = q->master;
 	bool ret = q->flags & XT_QUOTA_INVERT;
 
-	if (q->flags & XT_QUOTA_GROW) {
 	spin_lock_bh(&e->lock);
+	if (q->flags & XT_QUOTA_GROW) {
 		e->quota += (q->flags & XT_QUOTA_PACKET) ? 1 : skb->len;
 		q->quota = e->quota;
-		spin_unlock_bh(&e->lock);
 		ret = true;
 	} else {
-		spin_lock_bh(&e->lock);
 		if (e->quota >= skb->len) {
 			e->quota -= (q->flags & XT_QUOTA_PACKET) ? 1 : skb->len;
 			ret = !ret;
@@ -185,16 +211,15 @@ quota_mt2(const struct sk_buff *skb, const struct xt_match_param *par)
 			e->quota = 0;
 		}
 		q->quota = e->quota;
-		spin_unlock_bh(&e->lock);
 	}
-
+	spin_unlock_bh(&e->lock);
 	return ret;
 }
 
 static struct xt_match quota_mt2_reg[] __read_mostly = {
 	{
 		.name       = "quota2",
-		.revision   = 2,
+		.revision   = 3,
 		.family     = NFPROTO_IPV4,
 		.checkentry = quota_mt2_check,
 		.match      = quota_mt2,
@@ -204,7 +229,7 @@ static struct xt_match quota_mt2_reg[] __read_mostly = {
 	},
 	{
 		.name       = "quota2",
-		.revision   = 2,
+		.revision   = 3,
 		.family     = NFPROTO_IPV6,
 		.checkentry = quota_mt2_check,
 		.match      = quota_mt2,

extensions/xt_quota2.h

@@ -6,21 +6,19 @@ enum xt_quota_flags {
 	XT_QUOTA_GROW   = 1 << 1,
 	XT_QUOTA_PACKET = 1 << 2,
 	XT_QUOTA_MASK   = 0x7,
-
-	XT_QUOTA_COUNTER_NAME_LENGTH = 31,
 };
 
-struct quota_counter;
+struct xt_quota_counter;
 
 struct xt_quota_mtinfo2 {
-	char name[XT_QUOTA_COUNTER_NAME_LENGTH];
+	char name[15];
 	u_int8_t flags;
 
 	/* Comparison-invariant */
 	aligned_u64 quota;
 
 	/* Used internally by the kernel */
-	struct quota_counter *master __attribute__((aligned(8)));
+	struct xt_quota_counter *master __attribute__((aligned(8)));
 };
 
 #endif /* _XT_QUOTA_H */

mconfig

@@ -1,5 +1,6 @@
 # -*- Makefile -*-
 #
+build_ACCOUNT=m
 build_CHAOS=m
 build_DELUDE=m
 build_DHCPMAC=m
@@ -20,4 +21,6 @@ build_ipset=m
 build_ipv4options=m
 build_length2=m
 build_lscan=m
+build_pknock=m
+build_psd=m
 build_quota2=m

xtables-addons.8.in

@@ -1,6 +1,6 @@
-.TH xtables\-addons 8 "v1.17 (2009\-06\-16)" "" "v1.17 (2009\-06\-16)"
+.TH xtables-addons 8 "v1.19 (2009-10-12)" "" "v1.19 (2009-10-12)"
 .SH Name
-Xtables\-addons - additional extensions for iptables, ip6tables, etc.
+Xtables-addons \(em additional extensions for iptables, ip6tables, etc.
 .SH Targets
 .\" @TARGET@
 .SH Matches