Import upstream version 0.9.13
diff --git a/tests/bsc-nat/Makefile.am b/tests/bsc-nat/Makefile.am
new file mode 100644
index 0000000..04bdb97
--- /dev/null
+++ b/tests/bsc-nat/Makefile.am
@@ -0,0 +1,19 @@
+INCLUDES = $(all_includes) -I$(top_srcdir)/include
+AM_CFLAGS=-Wall -ggdb3 $(LIBOSMOCORE_CFLAGS) $(LIBOSMOSCCP_CFLAGS) $(COVERAGE_CFLAGS)
+AM_LDFLAGS = $(COVERAGE_LDFLAGS)
+
+EXTRA_DIST = bsc_data.c
+
+noinst_PROGRAMS = bsc_nat_test
+
+bsc_nat_test_SOURCES = bsc_nat_test.c \
+			$(top_srcdir)/src/osmo-bsc_nat/bsc_filter.c \
+			$(top_srcdir)/src/osmo-bsc_nat/bsc_sccp.c \
+			$(top_srcdir)/src/osmo-bsc_nat/bsc_nat_utils.c \
+			$(top_srcdir)/src/osmo-bsc_nat/bsc_mgcp_utils.c
+bsc_nat_test_LDADD = $(top_builddir)/src/libbsc/libbsc.a \
+			$(top_srcdir)/src/libmgcp/libmgcp.a \
+			$(top_srcdir)/src/libabis/libabis.a \
+			$(top_srcdir)/src/libtrau/libtrau.a \
+			$(top_srcdir)/src/libcommon/libcommon.a \
+			$(LIBOSMOCORE_LIBS) -lrt $(LIBOSMOSCCP_LIBS) $(LIBOSMOVTY_LIBS)
diff --git a/tests/bsc-nat/Makefile.in b/tests/bsc-nat/Makefile.in
new file mode 100644
index 0000000..280d22d
--- /dev/null
+++ b/tests/bsc-nat/Makefile.in
@@ -0,0 +1,535 @@
+# Makefile.in generated by automake 1.11.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008, 2009  Free Software Foundation,
+# Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+VPATH = @srcdir@
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkglibexecdir = $(libexecdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+noinst_PROGRAMS = bsc_nat_test$(EXEEXT)
+subdir = tests/bsc-nat
+DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+am__aclocal_m4_deps = $(top_srcdir)/configure.in
+am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
+	$(ACLOCAL_M4)
+mkinstalldirs = $(install_sh) -d
+CONFIG_HEADER = $(top_builddir)/bscconfig.h
+CONFIG_CLEAN_FILES =
+CONFIG_CLEAN_VPATH_FILES =
+PROGRAMS = $(noinst_PROGRAMS)
+am_bsc_nat_test_OBJECTS = bsc_nat_test.$(OBJEXT) bsc_filter.$(OBJEXT) \
+	bsc_sccp.$(OBJEXT) bsc_nat_utils.$(OBJEXT) \
+	bsc_mgcp_utils.$(OBJEXT)
+bsc_nat_test_OBJECTS = $(am_bsc_nat_test_OBJECTS)
+am__DEPENDENCIES_1 =
+bsc_nat_test_DEPENDENCIES = $(top_builddir)/src/libbsc/libbsc.a \
+	$(top_srcdir)/src/libmgcp/libmgcp.a \
+	$(top_srcdir)/src/libabis/libabis.a \
+	$(top_srcdir)/src/libtrau/libtrau.a \
+	$(top_srcdir)/src/libcommon/libcommon.a $(am__DEPENDENCIES_1) \
+	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
+DEFAULT_INCLUDES = -I.@am__isrc@ -I$(top_builddir)
+depcomp = $(SHELL) $(top_srcdir)/depcomp
+am__depfiles_maybe = depfiles
+am__mv = mv -f
+AM_V_lt = $(am__v_lt_$(V))
+am__v_lt_ = $(am__v_lt_$(AM_DEFAULT_VERBOSITY))
+am__v_lt_0 = --silent
+COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
+	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
+AM_V_CC = $(am__v_CC_$(V))
+am__v_CC_ = $(am__v_CC_$(AM_DEFAULT_VERBOSITY))
+am__v_CC_0 = @echo "  CC    " $@;
+AM_V_at = $(am__v_at_$(V))
+am__v_at_ = $(am__v_at_$(AM_DEFAULT_VERBOSITY))
+am__v_at_0 = @
+CCLD = $(CC)
+LINK = $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@
+AM_V_CCLD = $(am__v_CCLD_$(V))
+am__v_CCLD_ = $(am__v_CCLD_$(AM_DEFAULT_VERBOSITY))
+am__v_CCLD_0 = @echo "  CCLD  " $@;
+AM_V_GEN = $(am__v_GEN_$(V))
+am__v_GEN_ = $(am__v_GEN_$(AM_DEFAULT_VERBOSITY))
+am__v_GEN_0 = @echo "  GEN   " $@;
+SOURCES = $(bsc_nat_test_SOURCES)
+DIST_SOURCES = $(bsc_nat_test_SOURCES)
+ETAGS = etags
+CTAGS = ctags
+DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
+ACLOCAL = @ACLOCAL@
+AMTAR = @AMTAR@
+AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
+AUTOCONF = @AUTOCONF@
+AUTOHEADER = @AUTOHEADER@
+AUTOMAKE = @AUTOMAKE@
+AWK = @AWK@
+CC = @CC@
+CCDEPMODE = @CCDEPMODE@
+CFLAGS = @CFLAGS@
+COVERAGE_CFLAGS = @COVERAGE_CFLAGS@
+COVERAGE_LDFLAGS = @COVERAGE_LDFLAGS@
+CPP = @CPP@
+CPPFLAGS = @CPPFLAGS@
+CYGPATH_W = @CYGPATH_W@
+DEFS = @DEFS@
+DEPDIR = @DEPDIR@
+ECHO_C = @ECHO_C@
+ECHO_N = @ECHO_N@
+ECHO_T = @ECHO_T@
+EGREP = @EGREP@
+EXEEXT = @EXEEXT@
+GPRS_LIBGTP = @GPRS_LIBGTP@
+GREP = @GREP@
+INSTALL = @INSTALL@
+INSTALL_DATA = @INSTALL_DATA@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
+LDFLAGS = @LDFLAGS@
+LIBOBJS = @LIBOBJS@
+LIBOSMOCORE_CFLAGS = @LIBOSMOCORE_CFLAGS@
+LIBOSMOCORE_LIBS = @LIBOSMOCORE_LIBS@
+LIBOSMOSCCP_CFLAGS = @LIBOSMOSCCP_CFLAGS@
+LIBOSMOSCCP_LIBS = @LIBOSMOSCCP_LIBS@
+LIBOSMOVTY_CFLAGS = @LIBOSMOVTY_CFLAGS@
+LIBOSMOVTY_LIBS = @LIBOSMOVTY_LIBS@
+LIBS = @LIBS@
+LTLIBOBJS = @LTLIBOBJS@
+MAKEINFO = @MAKEINFO@
+MKDIR_P = @MKDIR_P@
+OBJEXT = @OBJEXT@
+PACKAGE = @PACKAGE@
+PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
+PACKAGE_NAME = @PACKAGE_NAME@
+PACKAGE_STRING = @PACKAGE_STRING@
+PACKAGE_TARNAME = @PACKAGE_TARNAME@
+PACKAGE_URL = @PACKAGE_URL@
+PACKAGE_VERSION = @PACKAGE_VERSION@
+PATH_SEPARATOR = @PATH_SEPARATOR@
+PKG_CONFIG = @PKG_CONFIG@
+PKG_CONFIG_LIBDIR = @PKG_CONFIG_LIBDIR@
+PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
+RANLIB = @RANLIB@
+SET_MAKE = @SET_MAKE@
+SHELL = @SHELL@
+STRIP = @STRIP@
+SYMBOL_VISIBILITY = @SYMBOL_VISIBILITY@
+VERSION = @VERSION@
+abs_builddir = @abs_builddir@
+abs_srcdir = @abs_srcdir@
+abs_top_builddir = @abs_top_builddir@
+abs_top_srcdir = @abs_top_srcdir@
+ac_ct_CC = @ac_ct_CC@
+am__include = @am__include@
+am__leading_dot = @am__leading_dot@
+am__quote = @am__quote@
+am__tar = @am__tar@
+am__untar = @am__untar@
+bindir = @bindir@
+build_alias = @build_alias@
+builddir = @builddir@
+datadir = @datadir@
+datarootdir = @datarootdir@
+docdir = @docdir@
+dvidir = @dvidir@
+exec_prefix = @exec_prefix@
+host_alias = @host_alias@
+htmldir = @htmldir@
+includedir = @includedir@
+infodir = @infodir@
+install_sh = @install_sh@
+libdir = @libdir@
+libexecdir = @libexecdir@
+localedir = @localedir@
+localstatedir = @localstatedir@
+mandir = @mandir@
+mkdir_p = @mkdir_p@
+oldincludedir = @oldincludedir@
+pdfdir = @pdfdir@
+prefix = @prefix@
+program_transform_name = @program_transform_name@
+psdir = @psdir@
+sbindir = @sbindir@
+sharedstatedir = @sharedstatedir@
+srcdir = @srcdir@
+sysconfdir = @sysconfdir@
+target_alias = @target_alias@
+top_build_prefix = @top_build_prefix@
+top_builddir = @top_builddir@
+top_srcdir = @top_srcdir@
+INCLUDES = $(all_includes) -I$(top_srcdir)/include
+AM_CFLAGS = -Wall -ggdb3 $(LIBOSMOCORE_CFLAGS) $(LIBOSMOSCCP_CFLAGS) $(COVERAGE_CFLAGS)
+AM_LDFLAGS = $(COVERAGE_LDFLAGS)
+EXTRA_DIST = bsc_data.c
+bsc_nat_test_SOURCES = bsc_nat_test.c \
+			$(top_srcdir)/src/osmo-bsc_nat/bsc_filter.c \
+			$(top_srcdir)/src/osmo-bsc_nat/bsc_sccp.c \
+			$(top_srcdir)/src/osmo-bsc_nat/bsc_nat_utils.c \
+			$(top_srcdir)/src/osmo-bsc_nat/bsc_mgcp_utils.c
+
+bsc_nat_test_LDADD = $(top_builddir)/src/libbsc/libbsc.a \
+			$(top_srcdir)/src/libmgcp/libmgcp.a \
+			$(top_srcdir)/src/libabis/libabis.a \
+			$(top_srcdir)/src/libtrau/libtrau.a \
+			$(top_srcdir)/src/libcommon/libcommon.a \
+			$(LIBOSMOCORE_LIBS) -lrt $(LIBOSMOSCCP_LIBS) $(LIBOSMOVTY_LIBS)
+
+all: all-am
+
+.SUFFIXES:
+.SUFFIXES: .c .o .obj
+$(srcdir)/Makefile.in:  $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu tests/bsc-nat/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu tests/bsc-nat/Makefile
+.PRECIOUS: Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe);; \
+	esac;
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure:  $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4):  $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+
+clean-noinstPROGRAMS:
+	-test -z "$(noinst_PROGRAMS)" || rm -f $(noinst_PROGRAMS)
+bsc_nat_test$(EXEEXT): $(bsc_nat_test_OBJECTS) $(bsc_nat_test_DEPENDENCIES) 
+	@rm -f bsc_nat_test$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(bsc_nat_test_OBJECTS) $(bsc_nat_test_LDADD) $(LIBS)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/bsc_filter.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/bsc_mgcp_utils.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/bsc_nat_test.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/bsc_nat_utils.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/bsc_sccp.Po@am__quote@
+
+.c.o:
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $<
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po
+@am__fastdepCC_FALSE@	$(AM_V_CC) @AM_BACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='$<' object='$@' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(COMPILE) -c $<
+
+.c.obj:
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ `$(CYGPATH_W) '$<'`
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po
+@am__fastdepCC_FALSE@	$(AM_V_CC) @AM_BACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='$<' object='$@' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(COMPILE) -c `$(CYGPATH_W) '$<'`
+
+bsc_filter.o: $(top_srcdir)/src/osmo-bsc_nat/bsc_filter.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT bsc_filter.o -MD -MP -MF $(DEPDIR)/bsc_filter.Tpo -c -o bsc_filter.o `test -f '$(top_srcdir)/src/osmo-bsc_nat/bsc_filter.c' || echo '$(srcdir)/'`$(top_srcdir)/src/osmo-bsc_nat/bsc_filter.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/bsc_filter.Tpo $(DEPDIR)/bsc_filter.Po
+@am__fastdepCC_FALSE@	$(AM_V_CC) @AM_BACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='$(top_srcdir)/src/osmo-bsc_nat/bsc_filter.c' object='bsc_filter.o' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o bsc_filter.o `test -f '$(top_srcdir)/src/osmo-bsc_nat/bsc_filter.c' || echo '$(srcdir)/'`$(top_srcdir)/src/osmo-bsc_nat/bsc_filter.c
+
+bsc_filter.obj: $(top_srcdir)/src/osmo-bsc_nat/bsc_filter.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT bsc_filter.obj -MD -MP -MF $(DEPDIR)/bsc_filter.Tpo -c -o bsc_filter.obj `if test -f '$(top_srcdir)/src/osmo-bsc_nat/bsc_filter.c'; then $(CYGPATH_W) '$(top_srcdir)/src/osmo-bsc_nat/bsc_filter.c'; else $(CYGPATH_W) '$(srcdir)/$(top_srcdir)/src/osmo-bsc_nat/bsc_filter.c'; fi`
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/bsc_filter.Tpo $(DEPDIR)/bsc_filter.Po
+@am__fastdepCC_FALSE@	$(AM_V_CC) @AM_BACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='$(top_srcdir)/src/osmo-bsc_nat/bsc_filter.c' object='bsc_filter.obj' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o bsc_filter.obj `if test -f '$(top_srcdir)/src/osmo-bsc_nat/bsc_filter.c'; then $(CYGPATH_W) '$(top_srcdir)/src/osmo-bsc_nat/bsc_filter.c'; else $(CYGPATH_W) '$(srcdir)/$(top_srcdir)/src/osmo-bsc_nat/bsc_filter.c'; fi`
+
+bsc_sccp.o: $(top_srcdir)/src/osmo-bsc_nat/bsc_sccp.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT bsc_sccp.o -MD -MP -MF $(DEPDIR)/bsc_sccp.Tpo -c -o bsc_sccp.o `test -f '$(top_srcdir)/src/osmo-bsc_nat/bsc_sccp.c' || echo '$(srcdir)/'`$(top_srcdir)/src/osmo-bsc_nat/bsc_sccp.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/bsc_sccp.Tpo $(DEPDIR)/bsc_sccp.Po
+@am__fastdepCC_FALSE@	$(AM_V_CC) @AM_BACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='$(top_srcdir)/src/osmo-bsc_nat/bsc_sccp.c' object='bsc_sccp.o' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o bsc_sccp.o `test -f '$(top_srcdir)/src/osmo-bsc_nat/bsc_sccp.c' || echo '$(srcdir)/'`$(top_srcdir)/src/osmo-bsc_nat/bsc_sccp.c
+
+bsc_sccp.obj: $(top_srcdir)/src/osmo-bsc_nat/bsc_sccp.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT bsc_sccp.obj -MD -MP -MF $(DEPDIR)/bsc_sccp.Tpo -c -o bsc_sccp.obj `if test -f '$(top_srcdir)/src/osmo-bsc_nat/bsc_sccp.c'; then $(CYGPATH_W) '$(top_srcdir)/src/osmo-bsc_nat/bsc_sccp.c'; else $(CYGPATH_W) '$(srcdir)/$(top_srcdir)/src/osmo-bsc_nat/bsc_sccp.c'; fi`
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/bsc_sccp.Tpo $(DEPDIR)/bsc_sccp.Po
+@am__fastdepCC_FALSE@	$(AM_V_CC) @AM_BACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='$(top_srcdir)/src/osmo-bsc_nat/bsc_sccp.c' object='bsc_sccp.obj' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o bsc_sccp.obj `if test -f '$(top_srcdir)/src/osmo-bsc_nat/bsc_sccp.c'; then $(CYGPATH_W) '$(top_srcdir)/src/osmo-bsc_nat/bsc_sccp.c'; else $(CYGPATH_W) '$(srcdir)/$(top_srcdir)/src/osmo-bsc_nat/bsc_sccp.c'; fi`
+
+bsc_nat_utils.o: $(top_srcdir)/src/osmo-bsc_nat/bsc_nat_utils.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT bsc_nat_utils.o -MD -MP -MF $(DEPDIR)/bsc_nat_utils.Tpo -c -o bsc_nat_utils.o `test -f '$(top_srcdir)/src/osmo-bsc_nat/bsc_nat_utils.c' || echo '$(srcdir)/'`$(top_srcdir)/src/osmo-bsc_nat/bsc_nat_utils.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/bsc_nat_utils.Tpo $(DEPDIR)/bsc_nat_utils.Po
+@am__fastdepCC_FALSE@	$(AM_V_CC) @AM_BACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='$(top_srcdir)/src/osmo-bsc_nat/bsc_nat_utils.c' object='bsc_nat_utils.o' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o bsc_nat_utils.o `test -f '$(top_srcdir)/src/osmo-bsc_nat/bsc_nat_utils.c' || echo '$(srcdir)/'`$(top_srcdir)/src/osmo-bsc_nat/bsc_nat_utils.c
+
+bsc_nat_utils.obj: $(top_srcdir)/src/osmo-bsc_nat/bsc_nat_utils.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT bsc_nat_utils.obj -MD -MP -MF $(DEPDIR)/bsc_nat_utils.Tpo -c -o bsc_nat_utils.obj `if test -f '$(top_srcdir)/src/osmo-bsc_nat/bsc_nat_utils.c'; then $(CYGPATH_W) '$(top_srcdir)/src/osmo-bsc_nat/bsc_nat_utils.c'; else $(CYGPATH_W) '$(srcdir)/$(top_srcdir)/src/osmo-bsc_nat/bsc_nat_utils.c'; fi`
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/bsc_nat_utils.Tpo $(DEPDIR)/bsc_nat_utils.Po
+@am__fastdepCC_FALSE@	$(AM_V_CC) @AM_BACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='$(top_srcdir)/src/osmo-bsc_nat/bsc_nat_utils.c' object='bsc_nat_utils.obj' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o bsc_nat_utils.obj `if test -f '$(top_srcdir)/src/osmo-bsc_nat/bsc_nat_utils.c'; then $(CYGPATH_W) '$(top_srcdir)/src/osmo-bsc_nat/bsc_nat_utils.c'; else $(CYGPATH_W) '$(srcdir)/$(top_srcdir)/src/osmo-bsc_nat/bsc_nat_utils.c'; fi`
+
+bsc_mgcp_utils.o: $(top_srcdir)/src/osmo-bsc_nat/bsc_mgcp_utils.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT bsc_mgcp_utils.o -MD -MP -MF $(DEPDIR)/bsc_mgcp_utils.Tpo -c -o bsc_mgcp_utils.o `test -f '$(top_srcdir)/src/osmo-bsc_nat/bsc_mgcp_utils.c' || echo '$(srcdir)/'`$(top_srcdir)/src/osmo-bsc_nat/bsc_mgcp_utils.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/bsc_mgcp_utils.Tpo $(DEPDIR)/bsc_mgcp_utils.Po
+@am__fastdepCC_FALSE@	$(AM_V_CC) @AM_BACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='$(top_srcdir)/src/osmo-bsc_nat/bsc_mgcp_utils.c' object='bsc_mgcp_utils.o' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o bsc_mgcp_utils.o `test -f '$(top_srcdir)/src/osmo-bsc_nat/bsc_mgcp_utils.c' || echo '$(srcdir)/'`$(top_srcdir)/src/osmo-bsc_nat/bsc_mgcp_utils.c
+
+bsc_mgcp_utils.obj: $(top_srcdir)/src/osmo-bsc_nat/bsc_mgcp_utils.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT bsc_mgcp_utils.obj -MD -MP -MF $(DEPDIR)/bsc_mgcp_utils.Tpo -c -o bsc_mgcp_utils.obj `if test -f '$(top_srcdir)/src/osmo-bsc_nat/bsc_mgcp_utils.c'; then $(CYGPATH_W) '$(top_srcdir)/src/osmo-bsc_nat/bsc_mgcp_utils.c'; else $(CYGPATH_W) '$(srcdir)/$(top_srcdir)/src/osmo-bsc_nat/bsc_mgcp_utils.c'; fi`
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/bsc_mgcp_utils.Tpo $(DEPDIR)/bsc_mgcp_utils.Po
+@am__fastdepCC_FALSE@	$(AM_V_CC) @AM_BACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='$(top_srcdir)/src/osmo-bsc_nat/bsc_mgcp_utils.c' object='bsc_mgcp_utils.obj' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o bsc_mgcp_utils.obj `if test -f '$(top_srcdir)/src/osmo-bsc_nat/bsc_mgcp_utils.c'; then $(CYGPATH_W) '$(top_srcdir)/src/osmo-bsc_nat/bsc_mgcp_utils.c'; else $(CYGPATH_W) '$(srcdir)/$(top_srcdir)/src/osmo-bsc_nat/bsc_mgcp_utils.c'; fi`
+
+ID: $(HEADERS) $(SOURCES) $(LISP) $(TAGS_FILES)
+	list='$(SOURCES) $(HEADERS) $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	mkid -fID $$unique
+tags: TAGS
+
+TAGS:  $(HEADERS) $(SOURCES)  $(TAGS_DEPENDENCIES) \
+		$(TAGS_FILES) $(LISP)
+	set x; \
+	here=`pwd`; \
+	list='$(SOURCES) $(HEADERS)  $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	shift; \
+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: CTAGS
+CTAGS:  $(HEADERS) $(SOURCES)  $(TAGS_DEPENDENCIES) \
+		$(TAGS_FILES) $(LISP)
+	list='$(SOURCES) $(HEADERS)  $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+distdir: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(PROGRAMS)
+installdirs:
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	$(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	  install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	  `test -z '$(STRIP)' || \
+	    echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-noinstPROGRAMS mostlyclean-am
+
+distclean: distclean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am:
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am:
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS all all-am check check-am clean clean-generic \
+	clean-noinstPROGRAMS ctags distclean distclean-compile \
+	distclean-generic distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am install-data \
+	install-data-am install-dvi install-dvi-am install-exec \
+	install-exec-am install-html install-html-am install-info \
+	install-info-am install-man install-pdf install-pdf-am \
+	install-ps install-ps-am install-strip installcheck \
+	installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic pdf pdf-am ps ps-am tags uninstall \
+	uninstall-am
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/tests/bsc-nat/bsc_data.c b/tests/bsc-nat/bsc_data.c
new file mode 100644
index 0000000..0475523
--- /dev/null
+++ b/tests/bsc-nat/bsc_data.c
@@ -0,0 +1,187 @@
+/* test data */
+
+/* BSC -> MSC, CR */
+static const uint8_t bsc_cr[] = {
+0x00, 0x2e, 0xfd,
+0x01, 0x00, 0x00, 0x15, 0x02, 0x02, 0x04, 0x02,
+0x42, 0xfe, 0x0f, 0x21, 0x00, 0x1f, 0x57, 0x05,
+0x08, 0x00, 0x72, 0xf4, 0x80, 0x20, 0x1c, 0xc3,
+0x51, 0x17, 0x12, 0x05, 0x08, 0x20, 0x72, 0xf4,
+0x90, 0x20, 0x1d, 0x50, 0x08, 0x29, 0x47, 0x80,
+0x00, 0x00, 0x00, 0x00, 0x80, 0x00 };
+
+static const uint8_t bsc_cr_patched[] = {
+0x00, 0x2e, 0xfd,
+0x01, 0x00, 0x00, 0x05, 0x02, 0x02, 0x04, 0x02,
+0x42, 0xfe, 0x0f, 0x21, 0x00, 0x1f, 0x57, 0x05,
+0x08, 0x00, 0x72, 0xf4, 0x80, 0x20, 0x1c, 0xc3,
+0x51, 0x17, 0x12, 0x05, 0x08, 0x20, 0x72, 0xf4,
+0x90, 0x20, 0x1d, 0x50, 0x08, 0x29, 0x47, 0x80,
+0x00, 0x00, 0x00, 0x00, 0x80, 0x00 };
+
+/* CC, MSC -> BSC */
+static const uint8_t msc_cc[] = {
+0x00, 0x0a, 0xfd,
+0x02, 0x00, 0x00, 0x05, 0x01, 0x1f, 0xe4, 0x02,
+0x01, 0x00 };
+static const uint8_t msc_cc_patched[] = {
+0x00, 0x0a, 0xfd,
+0x02, 0x00, 0x00, 0x15, 0x01, 0x1f, 0xe4, 0x02,
+0x01, 0x00 };
+
+/* Classmark, BSC -> MSC */
+static const uint8_t bsc_dtap[] = {
+0x00, 0x17, 0xfd,
+0x06, 0x01, 0x1f, 0xe4, 0x00, 0x01, 0x10, 0x00,
+0x0e, 0x54, 0x12, 0x03, 0x50, 0x18, 0x93, 0x13,
+0x06, 0x60, 0x14, 0x45, 0x00, 0x81, 0x00 };
+
+static const uint8_t bsc_dtap_patched[] = {
+0x00, 0x17, 0xfd,
+0x06, 0x01, 0x1f, 0xe4, 0x00, 0x01, 0x10, 0x00,
+0x0e, 0x54, 0x12, 0x03, 0x50, 0x18, 0x93, 0x13,
+0x06, 0x60, 0x14, 0x45, 0x00, 0x81, 0x00 };
+
+/* Clear command, MSC -> BSC */
+static const uint8_t msc_dtap[] = {
+0x00, 0x0d, 0xfd,
+0x06, 0x00, 0x00, 0x05, 0x00, 0x01, 0x06, 0x00,
+0x04, 0x20, 0x04, 0x01, 0x09 };
+static const uint8_t msc_dtap_patched[] = {
+0x00, 0x0d, 0xfd,
+0x06, 0x00, 0x00, 0x15, 0x00, 0x01, 0x06, 0x00,
+0x04, 0x20, 0x04, 0x01, 0x09 };
+
+/*RLSD, MSC -> BSC */
+static const uint8_t msc_rlsd[] = {
+0x00, 0x0a, 0xfd,
+0x04, 0x00, 0x00, 0x05, 0x01, 0x1f, 0xe4, 0x00,
+0x01, 0x00 };
+static const uint8_t msc_rlsd_patched[] = {
+0x00, 0x0a, 0xfd,
+0x04, 0x00, 0x00, 0x15, 0x01, 0x1f, 0xe4, 0x00,
+0x01, 0x00 };
+
+/* RLC, BSC -> MSC */
+static const uint8_t bsc_rlc[] = {
+0x00, 0x07, 0xfd,
+0x05, 0x01, 0x1f, 0xe4, 0x00, 0x00, 0x15 };
+
+static const uint8_t bsc_rlc_patched[] = {
+0x00, 0x07, 0xfd,
+0x05, 0x01, 0x1f, 0xe4, 0x00, 0x00, 0x05 };
+
+
+/* a paging command */
+static const uint8_t paging_by_lac_cmd[] = {
+0x00, 0x22, 0xfd, 0x09,
+0x00, 0x03, 0x07, 0x0b, 0x04, 0x43, 0x02, 0x00,
+0xfe, 0x04, 0x43, 0x5c, 0x00, 0xfe, 0x12, 0x00,
+0x10, 0x52, 0x08, 0x08, 0x29, 0x47, 0x10, 0x02,
+0x01, 0x50, 0x02, 0x30, 0x1a, 0x03, 0x05, 0x20,
+0x15 };
+
+/* an assignment command */
+static const uint8_t ass_cmd[] = {
+0x00, 0x12, 0xfd, 0x06,
+0x00, 0x00, 0x49, 0x00, 0x01, 0x0b, 0x00, 0x09,
+0x01, 0x0b, 0x03, 0x01, 0x0a, 0x11, 0x01, 0x00,
+0x01 };
+
+/* identity response */
+static const uint8_t id_resp[] = {
+0x00, 0x15, 0xfd, 0x06, 0x01, 0x1c, 0xdc,
+0x00, 0x01, 0x0e, 0x01, 0x00, 0x0b, 0x05, 0x59,
+0x08, 0x29, 0x40, 0x21, 0x03, 0x07, 0x48, 0x66,
+0x31
+};
+
+/*
+ * MGCP messages
+ */
+
+/* nothing to patch */
+static const char crcx[] = "CRCX 23265295 8@mgw MGCP 1.0\r\nC: 394b0439fb\r\nL: p:20, a:AMR, nt:IN\r\nM: recvonly\r\n";
+static const char crcx_patched[] = "CRCX 23265295 1e@mgw MGCP 1.0\r\nC: 394b0439fb\r\nL: p:20, a:AMR, nt:IN\r\nM: recvonly\r\n";
+
+
+/* patch the ip and port */
+static const char crcx_resp[] = "200 23265295\r\nI: 1\r\n\r\nv=0\r\nc=IN IP4 172.16.18.2\r\nm=audio 4002 RTP/AVP 98\r\na=rtpmap:98 AMR/8000\r\n";
+static const char crcx_resp_patched[] = "200 23265295\r\nI: 1\r\n\r\nv=0\r\nc=IN IP4 10.0.0.1\r\nm=audio 999 RTP/AVP 98\r\na=rtpmap:98 AMR/8000\r\n";
+
+/* patch the ip and port */
+static const char mdcx[] = "MDCX 23330829 8@mgw MGCP 1.0\r\nC: 394b0439fb\r\nI: 1\r\nL: p:20, a:AMR, nt:IN\r\nM: recvonly\r\n\r\nv=0\r\no=- 1049380491 0 IN IP4 172.16.18.2\r\ns=-\r\nc=IN IP4 172.16.18.2\r\nt=0 0\r\nm=audio 4410 RTP/AVP 126\r\na=rtpmap:126 AMR/8000/1\r\na=fmtp:126 mode-set=2;start-mode=0\r\na=ptime:20\r\na=recvonly\r\nm=image 4412 udptl t38\r\na=T38FaxVersion:0\r\na=T38MaxBitRate:14400\r\n";
+static const char mdcx_patched[] = "MDCX 23330829 1e@mgw MGCP 1.0\r\nC: 394b0439fb\r\nI: 1\r\nL: p:20, a:AMR, nt:IN\r\nM: recvonly\r\n\r\nv=0\r\no=- 1049380491 0 IN IP4 172.16.18.2\r\ns=-\r\nc=IN IP4 10.0.0.23\r\nt=0 0\r\nm=audio 6666 RTP/AVP 126\r\na=rtpmap:126 AMR/8000/1\r\na=fmtp:126 mode-set=2;start-mode=0\r\na=ptime:20\r\na=recvonly\r\nm=image 4412 udptl t38\r\na=T38FaxVersion:0\r\na=T38MaxBitRate:14400\r\n";
+
+
+static const char mdcx_resp[] = "200 23330829\r\n\r\nv=0\r\nc=IN IP4 172.16.18.2\r\nm=audio 4002 RTP/AVP 98\r\na=rtpmap:98 AMR/8000\r\n";
+static const char mdcx_resp_patched[] = "200 23330829\r\n\r\nv=0\r\nc=IN IP4 10.0.0.23\r\nm=audio 5555 RTP/AVP 98\r\na=rtpmap:98 AMR/8000\r\n";
+
+/* different line ending */
+static const char mdcx_resp2[] = "200 33330829\n\nv=0\nc=IN IP4 172.16.18.2\nm=audio 4002 RTP/AVP 98\na=rtpmap:98 AMR/8000\n";
+static const char mdcx_resp_patched2[] = "200 33330829\n\nv=0\nc=IN IP4 10.0.0.23\nm=audio 5555 RTP/AVP 98\na=rtpmap:98 AMR/8000\n";
+
+struct mgcp_patch_test {
+	const char *orig;
+	const char *patch;
+	const char *ip;
+	const int port;
+};
+
+static const struct mgcp_patch_test mgcp_messages[] = {
+	{
+		.orig = crcx,
+		.patch = crcx_patched,
+		.ip = "0.0.0.0",
+		.port = 2323,
+	},
+	{
+		.orig = crcx_resp,
+		.patch = crcx_resp_patched,
+		.ip = "10.0.0.1",
+		.port = 999,
+	},
+	{
+		.orig = mdcx,
+		.patch = mdcx_patched,
+		.ip = "10.0.0.23",
+		.port = 6666,
+	},
+	{
+		.orig = mdcx_resp,
+		.patch = mdcx_resp_patched,
+		.ip = "10.0.0.23",
+		.port = 5555,
+	},
+	{
+		.orig = mdcx_resp2,
+		.patch = mdcx_resp_patched2,
+		.ip = "10.0.0.23",
+		.port = 5555,
+	},
+};
+
+/* CC Setup messages */
+static const uint8_t cc_setup_national[] = {
+	0x00, 0x20, 0xfd, 0x06, 0x01, 0x12,
+	0x6d, 0x00, 0x01, 0x19, 0x01, 0x00, 0x16, 0x03,
+	0x05, 0x04, 0x06, 0x60, 0x04, 0x02, 0x00, 0x05,
+	0x81, 0x5e, 0x06, 0x81, 0x10, 0x27, 0x33, 0x63,
+	0x66, 0x15, 0x02, 0x11, 0x01
+};
+
+static const uint8_t cc_setup_national_patched[] = {
+	0x00, 0x21, 0xfd, 0x06, 0x01, 0x12,
+	0x6d, 0x00, 0x01, 0x1a, 0x01, 0x00, 0x17, 0x03,
+	0x05, 0x04, 0x06, 0x60, 0x04, 0x02, 0x00, 0x05,
+	0x81, 0x5e, 0x07, 0x91, 0x94, 0x71, 0x32, 0x33,
+	0x66, 0xf6, 0x15, 0x02, 0x11, 0x01
+};
+
+static const uint8_t cc_setup_international[] = {
+	0x00, 0x22, 0xfd, 0x06, 0x01, 0x13,
+	0xe7, 0x00, 0x01, 0x1b, 0x01, 0x00, 0x18, 0x03,
+	0x45, 0x04, 0x06, 0x60, 0x04, 0x02, 0x00, 0x05,
+	0x81, 0x5e, 0x08, 0x81, 0x00, 0x94, 0x71, 0x33,
+	0x63, 0x66, 0x03, 0x15, 0x02, 0x11, 0x01
+};
diff --git a/tests/bsc-nat/bsc_nat_test.c b/tests/bsc-nat/bsc_nat_test.c
new file mode 100644
index 0000000..504b691
--- /dev/null
+++ b/tests/bsc-nat/bsc_nat_test.c
@@ -0,0 +1,1016 @@
+/*
+ * BSC NAT Message filtering
+ *
+ * (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2010 by On-Waves
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+
+#include <openbsc/debug.h>
+#include <openbsc/gsm_data.h>
+#include <openbsc/bsc_nat.h>
+#include <openbsc/bsc_nat_sccp.h>
+
+#include <osmocore/talloc.h>
+
+#include <osmocom/sccp/sccp.h>
+#include <osmocore/protocol/gsm_08_08.h>
+
+#include <stdio.h>
+
+/* test messages for ipa */
+static uint8_t ipa_id[] = {
+	0x00, 0x01, 0xfe, 0x06,
+};
+
+/* SCCP messages are below */
+static uint8_t gsm_reset[] = {
+	0x00, 0x12, 0xfd,
+	0x09, 0x00, 0x03, 0x05, 0x07, 0x02, 0x42, 0xfe,
+	0x02, 0x42, 0xfe, 0x06, 0x00, 0x04, 0x30, 0x04,
+	0x01, 0x20,
+};
+
+static const uint8_t gsm_reset_ack[] = {
+	0x00, 0x13, 0xfd,
+	0x09, 0x00, 0x03, 0x07, 0x0b, 0x04, 0x43, 0x01,
+	0x00, 0xfe, 0x04, 0x43, 0x5c, 0x00, 0xfe, 0x03,
+	0x00, 0x01, 0x31,
+};
+
+static const uint8_t gsm_paging[] = {
+	0x00, 0x20, 0xfd,
+	0x09, 0x00, 0x03, 0x07, 0x0b, 0x04, 0x43, 0x01,
+	0x00, 0xfe, 0x04, 0x43, 0x5c, 0x00, 0xfe, 0x10,
+	0x00, 0x0e, 0x52, 0x08, 0x08, 0x29, 0x47, 0x10,
+	0x02, 0x01, 0x31, 0x97, 0x61, 0x1a, 0x01, 0x06,
+};
+
+/* BSC -> MSC connection open */
+static const uint8_t bssmap_cr[] = {
+	0x00, 0x2c, 0xfd,
+	0x01, 0x01, 0x02, 0x03, 0x02, 0x02, 0x04, 0x02,
+	0x42, 0xfe, 0x0f, 0x1f, 0x00, 0x1d, 0x57, 0x05,
+	0x08, 0x00, 0x72, 0xf4, 0x80, 0x20, 0x12, 0xc3,
+	0x50, 0x17, 0x10, 0x05, 0x24, 0x11, 0x03, 0x33,
+	0x19, 0xa2, 0x08, 0x29, 0x47, 0x10, 0x02, 0x01,
+	0x31, 0x97, 0x61, 0x00
+};
+
+/* MSC -> BSC connection confirm */
+static const uint8_t bssmap_cc[] = {
+	0x00, 0x0a, 0xfd,
+	0x02, 0x01, 0x02, 0x03, 0x00, 0x00, 0x03, 0x02, 0x01, 0x00,
+};
+
+/* MSC -> BSC released */
+static const uint8_t bssmap_released[] = {
+	0x00, 0x0e, 0xfd,
+	0x04, 0x00, 0x00, 0x03, 0x01, 0x02, 0x03, 0x00, 0x01, 0x0f,
+	0x02, 0x23, 0x42, 0x00,
+};
+
+/* BSC -> MSC released */
+static const uint8_t bssmap_release_complete[] = {
+	0x00, 0x07, 0xfd,
+	0x05, 0x01, 0x02, 0x03, 0x00, 0x00, 0x03
+};
+
+/* both directions IT timer */
+static const uint8_t connnection_it[] = {
+	0x00, 0x0b, 0xfd,
+	0x10, 0x01, 0x02, 0x03, 0x01, 0x02, 0x03,
+	0x00, 0x00, 0x00, 0x00,
+};
+
+/* error in both directions */
+static const uint8_t proto_error[] = {
+	0x00, 0x05, 0xfd,
+	0x0f, 0x22, 0x33, 0x44, 0x00,
+};
+
+/* MGCP wrap... */
+static const uint8_t mgcp_msg[] = {
+	0x00, 0x03, 0xfc,
+	0x20, 0x20, 0x20,
+};
+
+/* location updating request */
+static const uint8_t bss_lu[] = {
+	0x00, 0x2e, 0xfd,
+	0x01, 0x91, 0x45, 0x14, 0x02, 0x02, 0x04, 0x02,
+	0x42, 0xfe, 0x0f, 0x21, 0x00, 0x1f, 0x57, 0x05,
+	0x08, 0x00, 0x72, 0xf4, 0x80, 0x20, 0x14, 0xc3,
+	0x50, 0x17, 0x12, 0x05, 0x08, 0x70, 0x72, 0xf4,
+	0x80, 0xff, 0xfe, 0x30, 0x08, 0x29, 0x44, 0x50,
+	0x12, 0x03, 0x24, 0x01, 0x95, 0x00
+};
+
+/* paging response */
+static const uint8_t pag_resp[] = {
+	0x00, 0x2c, 0xfd, 0x01, 0xe5, 0x68,
+	0x14, 0x02, 0x02, 0x04, 0x02, 0x42, 0xfe, 0x0f,
+	0x1f, 0x00, 0x1d, 0x57, 0x05, 0x08, 0x00, 0x72,
+	0xf4, 0x80, 0x20, 0x16, 0xc3, 0x50, 0x17, 0x10,
+	0x06, 0x27, 0x01, 0x03, 0x30, 0x18, 0x96, 0x08,
+	0x29, 0x26, 0x30, 0x32, 0x11, 0x42, 0x01, 0x19,
+	0x00
+};
+
+struct filter_result {
+	const uint8_t *data;
+	const uint16_t length;
+	const int dir;
+	const int result;
+};
+
+static const struct filter_result results[] = {
+	{
+		.data = ipa_id,
+		.length = ARRAY_SIZE(ipa_id),
+		.dir = DIR_MSC,
+		.result = 1,
+	},
+	{
+		.data = gsm_reset,
+		.length = ARRAY_SIZE(gsm_reset),
+		.dir = DIR_MSC,
+		.result = 1,
+	},
+	{
+		.data = gsm_reset_ack,
+		.length = ARRAY_SIZE(gsm_reset_ack),
+		.dir = DIR_BSC,
+		.result = 1,
+	},
+	{
+		.data = gsm_paging,
+		.length = ARRAY_SIZE(gsm_paging),
+		.dir = DIR_BSC,
+		.result = 0,
+	},
+	{
+		.data = bssmap_cr,
+		.length = ARRAY_SIZE(bssmap_cr),
+		.dir = DIR_MSC,
+		.result = 0,
+	},
+	{
+		.data = bssmap_cc,
+		.length = ARRAY_SIZE(bssmap_cc),
+		.dir = DIR_BSC,
+		.result = 0,
+	},
+	{
+		.data = bssmap_released,
+		.length = ARRAY_SIZE(bssmap_released),
+		.dir = DIR_MSC,
+		.result = 0,
+	},
+	{
+		.data = bssmap_release_complete,
+		.length = ARRAY_SIZE(bssmap_release_complete),
+		.dir = DIR_BSC,
+		.result = 0,
+	},
+	{
+		.data = mgcp_msg,
+		.length = ARRAY_SIZE(mgcp_msg),
+		.dir = DIR_MSC,
+		.result = 0,
+	},
+	{
+		.data = connnection_it,
+		.length = ARRAY_SIZE(connnection_it),
+		.dir = DIR_BSC,
+		.result = 0,
+	},
+	{
+		.data = connnection_it,
+		.length = ARRAY_SIZE(connnection_it),
+		.dir = DIR_MSC,
+		.result = 0,
+	},
+	{
+		.data = proto_error,
+		.length = ARRAY_SIZE(proto_error),
+		.dir = DIR_BSC,
+		.result = 0,
+	},
+	{
+		.data = proto_error,
+		.length = ARRAY_SIZE(proto_error),
+		.dir = DIR_MSC,
+		.result = 0,
+	},
+
+};
+
+static void test_filter(void)
+{
+	int i;
+
+
+	/* start testinh with proper messages */
+	fprintf(stderr, "Testing BSS Filtering.\n");
+	for (i = 0; i < ARRAY_SIZE(results); ++i) {
+		int result;
+		struct bsc_nat_parsed *parsed;
+		struct msgb *msg = msgb_alloc(4096, "test-message");
+
+		fprintf(stderr, "Going to test item: %d\n", i);
+		memcpy(msg->data, results[i].data, results[i].length);
+		msg->l2h = msgb_put(msg, results[i].length);
+
+		parsed = bsc_nat_parse(msg);
+		if (!parsed) {
+			fprintf(stderr, "FAIL: Failed to parse the message\n");
+			continue;
+		}
+
+		result = bsc_nat_filter_ipa(results[i].dir, msg, parsed);
+		if (result != results[i].result) {
+			fprintf(stderr, "FAIL: Not the expected result got: %d wanted: %d\n",
+				result, results[i].result);
+		}
+
+		msgb_free(msg);
+	}
+}
+
+#include "bsc_data.c"
+
+static void copy_to_msg(struct msgb *msg, const uint8_t *data, unsigned int length)
+{
+	msgb_reset(msg);
+	msg->l2h = msgb_put(msg, length);
+	memcpy(msg->l2h, data, msgb_l2len(msg));
+}
+
+#define VERIFY(con_found, con, msg, ver, str) \
+	if (!con_found || con_found->bsc != con) { \
+		fprintf(stderr, "Failed to find the con: %p\n", con_found); \
+		abort(); \
+	} \
+	if (memcmp(msg->data, ver, sizeof(ver)) != 0) { \
+		fprintf(stderr, "Failed to patch the %s msg.\n", str); \
+		abort(); \
+	}
+
+/* test conn tracking once */
+static void test_contrack()
+{
+	struct bsc_nat *nat;
+	struct bsc_connection *con;
+	struct sccp_connections *con_found;
+	struct sccp_connections *rc_con;
+	struct bsc_nat_parsed *parsed;
+	struct msgb *msg;
+
+	fprintf(stderr, "Testing connection tracking.\n");
+	nat = bsc_nat_alloc();
+	con = bsc_connection_alloc(nat);
+	con->cfg = bsc_config_alloc(nat, "foo");
+	bsc_config_add_lac(con->cfg, 23);
+	bsc_config_add_lac(con->cfg, 49);
+	bsc_config_add_lac(con->cfg, 42);
+	bsc_config_del_lac(con->cfg, 49);
+	bsc_config_add_lac(con->cfg, 1111);
+	msg = msgb_alloc(4096, "test");
+
+	/* 1.) create a connection */
+	copy_to_msg(msg, bsc_cr, sizeof(bsc_cr));
+	parsed = bsc_nat_parse(msg);
+	con_found = patch_sccp_src_ref_to_msc(msg, parsed, con);
+	if (con_found != NULL) {
+		fprintf(stderr, "Con should not exist %p\n", con_found);
+		abort();
+	}
+	rc_con = create_sccp_src_ref(con, parsed);
+	if (!rc_con) {
+		fprintf(stderr, "Failed to create a ref\n");
+		abort();
+	}
+	con_found = patch_sccp_src_ref_to_msc(msg, parsed, con);
+	if (!con_found || con_found->bsc != con) {
+		fprintf(stderr, "Failed to find the con: %p\n", con_found);
+		abort();
+	}
+	if (con_found != rc_con) {
+		fprintf(stderr, "Failed to find the right connection.\n");
+		abort();
+	}
+	if (memcmp(msg->data, bsc_cr_patched, sizeof(bsc_cr_patched)) != 0) {
+		fprintf(stderr, "Failed to patch the BSC CR msg.\n");
+		abort();
+	}
+	talloc_free(parsed);
+
+	/* 2.) get the cc */
+	copy_to_msg(msg, msc_cc, sizeof(msc_cc));
+	parsed = bsc_nat_parse(msg);
+	con_found = patch_sccp_src_ref_to_bsc(msg, parsed, nat);
+	VERIFY(con_found, con, msg, msc_cc_patched, "MSC CC");
+	if (update_sccp_src_ref(con_found, parsed) != 0) {
+		fprintf(stderr, "Failed to update the SCCP con.\n");
+		abort();
+	}
+
+	/* 3.) send some data */
+	copy_to_msg(msg, bsc_dtap, sizeof(bsc_dtap));
+	parsed = bsc_nat_parse(msg);
+	con_found = patch_sccp_src_ref_to_msc(msg, parsed, con);
+	VERIFY(con_found, con, msg, bsc_dtap_patched, "BSC DTAP");
+
+	/* 4.) receive some data */
+	copy_to_msg(msg, msc_dtap, sizeof(msc_dtap));
+	parsed = bsc_nat_parse(msg);
+	con_found = patch_sccp_src_ref_to_bsc(msg, parsed, nat);
+	VERIFY(con_found, con, msg, msc_dtap_patched, "MSC DTAP");
+
+	/* 5.) close the connection */
+	copy_to_msg(msg, msc_rlsd, sizeof(msc_rlsd));
+	parsed = bsc_nat_parse(msg);
+	con_found = patch_sccp_src_ref_to_bsc(msg, parsed, nat);
+	VERIFY(con_found, con, msg, msc_rlsd_patched, "MSC RLSD");
+
+	/* 6.) confirm the connection close */
+	copy_to_msg(msg, bsc_rlc, sizeof(bsc_rlc));
+	parsed = bsc_nat_parse(msg);
+	con_found = patch_sccp_src_ref_to_msc(msg, parsed, con);
+	if (!con_found || con_found->bsc != con) {
+		fprintf(stderr, "Failed to find the con: %p\n", con_found);
+		abort();
+	}
+	if (memcmp(msg->data, bsc_rlc_patched, sizeof(bsc_rlc_patched)) != 0) {
+		fprintf(stderr, "Failed to patch the BSC CR msg.\n");
+		abort();
+	}
+	remove_sccp_src_ref(con, msg, parsed);
+	talloc_free(parsed);
+
+	copy_to_msg(msg, bsc_rlc, sizeof(bsc_rlc));
+	parsed = bsc_nat_parse(msg);
+	con_found = patch_sccp_src_ref_to_msc(msg, parsed, con);
+
+	/* verify that it is gone */
+	if (con_found != NULL) {
+		fprintf(stderr, "Con should be gone. %p\n", con_found);
+		abort();
+	}
+	talloc_free(parsed);
+
+
+	bsc_config_free(con->cfg);
+	talloc_free(nat);
+	msgb_free(msg);
+}
+
+static void test_paging(void)
+{
+	int lac;
+	struct bsc_nat *nat;
+	struct bsc_connection *con;
+	struct bsc_nat_parsed *parsed;
+	struct bsc_config *cfg;
+	struct msgb *msg;
+
+	fprintf(stderr, "Testing paging by lac.\n");
+
+	nat = bsc_nat_alloc();
+	con = bsc_connection_alloc(nat);
+	cfg = bsc_config_alloc(nat, "unknown");
+	con->cfg = cfg;
+	bsc_config_add_lac(cfg, 23);
+	con->authenticated = 1;
+	llist_add(&con->list_entry, &nat->bsc_connections);
+	msg = msgb_alloc(4096, "test");
+
+	/* Test completely bad input */
+	copy_to_msg(msg, paging_by_lac_cmd, sizeof(paging_by_lac_cmd));
+	if (bsc_nat_find_bsc(nat, msg, &lac) != 0) {
+		fprintf(stderr, "Should have not found anything.\n");
+		abort();
+	}
+
+	/* Test it by not finding it */
+	copy_to_msg(msg, paging_by_lac_cmd, sizeof(paging_by_lac_cmd));
+	parsed = bsc_nat_parse(msg);
+	if (bsc_nat_find_bsc(nat, msg, &lac) != 0) {
+		fprintf(stderr, "Should have not found aynthing.\n");
+		abort();
+	}
+	talloc_free(parsed);
+
+	/* Test by finding it */
+	bsc_config_del_lac(cfg, 23);
+	bsc_config_add_lac(cfg, 8213);
+	copy_to_msg(msg, paging_by_lac_cmd, sizeof(paging_by_lac_cmd));
+	parsed = bsc_nat_parse(msg);
+	if (bsc_nat_find_bsc(nat, msg, &lac) != con) {
+		fprintf(stderr, "Should have found it.\n");
+		abort();
+	}
+	talloc_free(parsed);
+}
+
+static void test_mgcp_allocations(void)
+{
+#if 0
+	struct bsc_connection *bsc;
+	struct bsc_nat *nat;
+	struct sccp_connections con;
+	int i, j, multiplex;
+
+	fprintf(stderr, "Testing MGCP.\n");
+	memset(&con, 0, sizeof(con));
+
+	nat = bsc_nat_alloc();
+	nat->bsc_endpoints = talloc_zero_array(nat,
+					       struct bsc_endpoint,
+					       65);
+	nat->mgcp_cfg = mgcp_config_alloc();
+	nat->mgcp_cfg->trunk.number_endpoints = 64;
+
+	bsc = bsc_connection_alloc(nat);
+	bsc->cfg = bsc_config_alloc(nat, "foo");
+	bsc->cfg->max_endpoints = 60;
+	bsc_config_add_lac(bsc->cfg, 2323);
+	bsc->last_endpoint = 0x22;
+	con.bsc = bsc;
+
+	bsc_init_endps_if_needed(bsc);
+
+	i  = 1;
+	do {
+		if (bsc_assign_endpoint(bsc, &con) != 0) {
+			fprintf(stderr, "failed to allocate... on iteration %d\n", i);
+			break;
+		}
+		++i;
+	} while(1);
+
+	multiplex = bsc_mgcp_nr_multiplexes(bsc->cfg->max_endpoints);
+	for (i = 0; i < multiplex; ++i) {
+		for (j = 0; j < 32; ++j)
+			printf("%d", bsc->_endpoint_status[i*32 + j]);
+		printf(": %d of %d\n", i*32 + 32, 32 * 8);
+	}
+#endif
+}
+
+static void test_mgcp_ass_tracking(void)
+{
+	struct bsc_connection *bsc;
+	struct bsc_nat *nat;
+	struct sccp_connections con;
+	struct bsc_nat_parsed *parsed;
+	struct msgb *msg;
+
+	fprintf(stderr, "Testing MGCP.\n");
+	memset(&con, 0, sizeof(con));
+
+	nat = bsc_nat_alloc();
+	nat->bsc_endpoints = talloc_zero_array(nat,
+					       struct bsc_endpoint,
+					       33);
+	nat->mgcp_cfg = mgcp_config_alloc();
+	nat->mgcp_cfg->trunk.number_endpoints = 64;
+
+	bsc = bsc_connection_alloc(nat);
+	bsc->cfg = bsc_config_alloc(nat, "foo");
+	bsc_config_add_lac(bsc->cfg, 2323);
+	bsc->last_endpoint = 0x1e;
+	con.bsc = bsc;
+
+	msg = msgb_alloc(4096, "foo");
+	copy_to_msg(msg, ass_cmd, sizeof(ass_cmd));
+	parsed = bsc_nat_parse(msg);
+
+	if (msg->l2h[16] != 0 ||
+	    msg->l2h[17] != 0x1) {
+		fprintf(stderr, "Input is not as expected.. %s 0x%x\n",
+			hexdump(msg->l2h, msgb_l2len(msg)),
+			msg->l2h[17]);
+		abort();
+	}
+
+	if (bsc_mgcp_assign_patch(&con, msg) != 0) {
+		fprintf(stderr, "Failed to handle assignment.\n");
+		abort();
+	}
+
+	if (con.msc_endp != 1) {
+		fprintf(stderr, "Timeslot should be 1.\n");
+		abort();
+	}
+
+	if (con.bsc_endp != 0x1) {
+		fprintf(stderr, "Assigned timeslot should have been 1.\n");
+		abort();
+	}
+	if (con.bsc->_endpoint_status[0x1] != 1) {
+		fprintf(stderr, "The status on the BSC is wrong.\n");
+		abort();
+	}
+
+	int multiplex, timeslot;
+	mgcp_endpoint_to_timeslot(0x1, &multiplex, &timeslot);
+
+	uint16_t cic = htons(timeslot & 0x1f);
+	if (memcmp(&cic, &msg->l2h[16], sizeof(cic)) != 0) {
+		fprintf(stderr, "Message was not patched properly\n");
+		fprintf(stderr, "data cic: 0x%x %s\n", cic, hexdump(msg->l2h, msgb_l2len(msg)));
+		abort();
+	}
+
+	talloc_free(parsed);
+
+	bsc_mgcp_dlcx(&con);
+	if (con.bsc_endp != -1 || con.msc_endp != -1 ||
+	    con.bsc->_endpoint_status[1] != 0 || con.bsc->last_endpoint != 0x1) {
+		fprintf(stderr, "Clearing should remove the mapping.\n");
+		abort();
+	}
+
+	bsc_config_free(bsc->cfg);
+	talloc_free(nat);
+}
+
+/* test the code to find a given connection */
+static void test_mgcp_find(void)
+{
+	struct bsc_nat *nat;
+	struct bsc_connection *con;
+	struct sccp_connections *sccp_con;
+
+	fprintf(stderr, "Testing finding of a BSC Connection\n");
+
+	nat = bsc_nat_alloc();
+	con = bsc_connection_alloc(nat);
+	llist_add(&con->list_entry, &nat->bsc_connections);
+
+	sccp_con = talloc_zero(con, struct sccp_connections);
+	sccp_con->msc_endp = 12;
+	sccp_con->bsc_endp = 12;
+	sccp_con->bsc = con;
+	llist_add(&sccp_con->list_entry, &nat->sccp_connections);
+
+	if (bsc_mgcp_find_con(nat, 11) != NULL) {
+		fprintf(stderr, "Found the wrong connection.\n");
+		abort();
+	}
+
+	if (bsc_mgcp_find_con(nat, 12) != sccp_con) {
+		fprintf(stderr, "Didn't find the connection\n");
+		abort();
+	}
+
+	/* free everything */
+	talloc_free(nat);
+}
+
+static void test_mgcp_rewrite(void)
+{
+	int i;
+	struct msgb *output;
+	fprintf(stderr, "Test rewriting MGCP messages.\n");
+
+	for (i = 0; i < ARRAY_SIZE(mgcp_messages); ++i) {
+		const char *orig = mgcp_messages[i].orig;
+		const char *patc = mgcp_messages[i].patch;
+		const char *ip = mgcp_messages[i].ip;
+		const int port = mgcp_messages[i].port;
+
+		char *input = strdup(orig);
+
+		output = bsc_mgcp_rewrite(input, strlen(input), 0x1e, ip, port);
+		if (msgb_l2len(output) != strlen(patc)) {
+			fprintf(stderr, "Wrong sizes for test: %d  %d != %d != %d\n", i, msgb_l2len(output), strlen(patc), strlen(orig));
+			fprintf(stderr, "String '%s' vs '%s'\n", (const char *) output->l2h, patc);
+			abort();
+		}
+
+		if (memcmp(output->l2h, patc, msgb_l2len(output)) != 0) {
+			fprintf(stderr, "Broken on %d msg: '%s'\n", i, (const char *) output->l2h);
+			abort();
+		}
+
+		msgb_free(output);
+		free(input);
+	}
+}
+
+static void test_mgcp_parse(void)
+{
+	int code, ci;
+	char transaction[60];
+
+	fprintf(stderr, "Test MGCP response parsing.\n");
+
+	if (bsc_mgcp_parse_response(crcx_resp, &code, transaction) != 0) {
+		fprintf(stderr, "Failed to parse CRCX resp.\n");
+		abort();
+	}
+
+	if (code != 200) {
+		fprintf(stderr, "Failed to parse the CODE properly. Got: %d\n", code);
+		abort();
+	}
+
+	if (strcmp(transaction, "23265295") != 0) {
+		fprintf(stderr, "Failed to parse transaction id: '%s'\n", transaction);
+		abort();
+	}
+
+	ci = bsc_mgcp_extract_ci(crcx_resp);
+	if (ci != 1) {
+		fprintf(stderr, "Failed to parse the CI. Got: %d\n", ci);
+		abort();
+	}
+}
+
+struct cr_filter {
+	const uint8_t *data;
+	int length;
+	int result;
+	int contype;
+
+	const char *bsc_imsi_allow;
+	const char *bsc_imsi_deny;
+	const char *nat_imsi_deny;
+};
+
+static struct cr_filter cr_filter[] = {
+	{
+		.data = bssmap_cr,
+		.length = sizeof(bssmap_cr),
+		.result = 1,
+		.contype = NAT_CON_TYPE_CM_SERV_REQ,
+	},
+	{
+		.data = bss_lu,
+		.length = sizeof(bss_lu),
+		.result = 1,
+		.contype = NAT_CON_TYPE_LU,
+	},
+	{
+		.data = pag_resp,
+		.length = sizeof(pag_resp),
+		.result = 1,
+		.contype = NAT_CON_TYPE_PAG_RESP,
+	},
+	{
+		/* nat deny is before blank/null BSC */
+		.data = bss_lu,
+		.length = sizeof(bss_lu),
+		.result = -3,
+		.nat_imsi_deny = "[0-9]*",
+		.contype = NAT_CON_TYPE_LU,
+	},
+	{
+		/* BSC allow is before NAT deny */
+		.data = bss_lu,
+		.length = sizeof(bss_lu),
+		.result = 1,
+		.nat_imsi_deny = "[0-9]*",
+		.bsc_imsi_allow = "2440[0-9]*",
+		.contype = NAT_CON_TYPE_LU,
+	},
+	{
+		/* BSC allow is before NAT deny */
+		.data = bss_lu,
+		.length = sizeof(bss_lu),
+		.result = 1,
+		.bsc_imsi_allow = "[0-9]*",
+		.nat_imsi_deny = "[0-9]*",
+		.contype = NAT_CON_TYPE_LU,
+	},
+	{
+		/* filter as deny is first */
+		.data = bss_lu,
+		.length = sizeof(bss_lu),
+		.result = 1,
+		.bsc_imsi_deny = "[0-9]*",
+		.bsc_imsi_allow = "[0-9]*",
+		.nat_imsi_deny = "[0-9]*",
+		.contype = NAT_CON_TYPE_LU,
+	},
+	{
+		/* deny by nat rule */
+		.data = bss_lu,
+		.length = sizeof(bss_lu),
+		.result = -3,
+		.bsc_imsi_deny = "000[0-9]*",
+		.nat_imsi_deny = "[0-9]*",
+		.contype = NAT_CON_TYPE_LU,
+	},
+	{
+		/* deny by bsc rule */
+		.data = bss_lu,
+		.length = sizeof(bss_lu),
+		.result = -2,
+		.bsc_imsi_deny = "[0-9]*",
+		.contype = NAT_CON_TYPE_LU,
+	},
+
+};
+
+static void test_cr_filter()
+{
+	int i, res, contype;
+	struct msgb *msg = msgb_alloc(4096, "test_cr_filter");
+	struct bsc_nat_parsed *parsed;
+	struct bsc_nat_acc_lst *nat_lst, *bsc_lst;
+	struct bsc_nat_acc_lst_entry *nat_entry, *bsc_entry;
+
+	struct bsc_nat *nat = bsc_nat_alloc();
+	struct bsc_connection *bsc = bsc_connection_alloc(nat);
+	bsc->cfg = bsc_config_alloc(nat, "foo");
+	bsc_config_add_lac(bsc->cfg, 1234);
+	bsc->cfg->acc_lst_name = "bsc";
+	nat->acc_lst_name = "nat";
+
+	nat_lst = bsc_nat_acc_lst_get(nat, "nat");
+	bsc_lst = bsc_nat_acc_lst_get(nat, "bsc");
+
+	bsc_entry = bsc_nat_acc_lst_entry_create(bsc_lst);
+	nat_entry = bsc_nat_acc_lst_entry_create(nat_lst);
+
+	for (i = 0; i < ARRAY_SIZE(cr_filter); ++i) {
+		char *imsi;
+		msgb_reset(msg);
+		copy_to_msg(msg, cr_filter[i].data, cr_filter[i].length);
+
+		nat_lst = bsc_nat_acc_lst_get(nat, "nat");
+		bsc_lst = bsc_nat_acc_lst_get(nat, "bsc");
+
+		bsc_parse_reg(nat_entry, &nat_entry->imsi_deny_re, &nat_entry->imsi_deny,
+			      cr_filter[i].nat_imsi_deny ? 1 : 0,
+			      &cr_filter[i].nat_imsi_deny);
+		bsc_parse_reg(bsc_entry, &bsc_entry->imsi_allow_re, &bsc_entry->imsi_allow,
+			      cr_filter[i].bsc_imsi_allow ? 1 : 0,
+			      &cr_filter[i].bsc_imsi_allow);
+		bsc_parse_reg(bsc_entry, &bsc_entry->imsi_deny_re, &bsc_entry->imsi_deny,
+			      cr_filter[i].bsc_imsi_deny ? 1 : 0,
+			      &cr_filter[i].bsc_imsi_deny);
+
+		parsed = bsc_nat_parse(msg);
+		if (!parsed) {
+			fprintf(stderr, "FAIL: Failed to parse the message\n");
+			abort();
+		}
+
+		res = bsc_nat_filter_sccp_cr(bsc, msg, parsed, &contype, &imsi);
+		if (res != cr_filter[i].result) {
+			fprintf(stderr, "FAIL: Wrong result %d for test %d.\n", res, i);
+			abort();
+		}
+
+		if (contype != cr_filter[i].contype) {
+			fprintf(stderr, "FAIL: Wrong contype %d for test %d.\n", res, contype);
+			abort();
+		}
+
+		talloc_steal(parsed, imsi);
+		talloc_free(parsed);
+	}
+
+	msgb_free(msg);
+}
+
+static void test_dt_filter()
+{
+	int i;
+	struct msgb *msg = msgb_alloc(4096, "test_dt_filter");
+	struct bsc_nat_parsed *parsed;
+
+	struct bsc_nat *nat = bsc_nat_alloc();
+	struct bsc_connection *bsc = bsc_connection_alloc(nat);
+	struct sccp_connections *con = talloc_zero(0, struct sccp_connections);
+
+	bsc->cfg = bsc_config_alloc(nat, "foo");
+	bsc_config_add_lac(bsc->cfg, 23);
+	con->bsc = bsc;
+
+	msgb_reset(msg);
+	copy_to_msg(msg, id_resp, ARRAY_SIZE(id_resp));
+
+	parsed = bsc_nat_parse(msg);
+	if (!parsed) {
+		fprintf(stderr, "FAIL: Could not parse ID resp\n");
+		abort();
+	}
+
+	if (parsed->bssap != BSSAP_MSG_DTAP) {
+		fprintf(stderr, "FAIL: It should be dtap\n");
+		abort();
+	}
+
+	/* gsm_type is actually the size of the dtap */
+	if (parsed->gsm_type < msgb_l3len(msg) - 3) {
+		fprintf(stderr, "FAIL: Not enough space for the content\n");
+		abort();
+	}
+
+	if (bsc_nat_filter_dt(bsc, msg, con, parsed) != 1) {
+		fprintf(stderr, "FAIL: Should have passed..\n");
+		abort();
+	}
+
+	/* just some basic length checking... */
+	for (i = ARRAY_SIZE(id_resp); i >= 0; --i) {
+		msgb_reset(msg);
+		copy_to_msg(msg, id_resp, ARRAY_SIZE(id_resp));
+
+		parsed = bsc_nat_parse(msg);
+		if (!parsed)
+			continue;
+
+		con->imsi_checked = 0;
+		bsc_nat_filter_dt(bsc, msg, con, parsed);
+	}
+}
+
+static void test_setup_rewrite()
+{
+	struct msgb *msg = msgb_alloc(4096, "test_dt_filter");
+	struct msgb *out;
+	struct bsc_nat_parsed *parsed;
+	const char *imsi = "27408000001234";
+
+	struct bsc_nat *nat = bsc_nat_alloc();
+
+	/* a fake list */
+	struct msg_entries entries;
+	struct msg_entry entry;
+
+	INIT_LLIST_HEAD(&entries.entry);
+	entry.mcc = "274";
+	entry.mnc = "08";
+	entry.option = "^0([1-9])";
+	entry.text = "0049";
+	llist_add_tail(&entry.list, &entries.entry);
+	nat->num_rewr = &entries;
+
+	/* verify that nothing changed */
+	msgb_reset(msg);
+	copy_to_msg(msg, cc_setup_international, ARRAY_SIZE(cc_setup_international));
+	parsed = bsc_nat_parse(msg);
+	if (!parsed) {
+		fprintf(stderr, "FAIL: Could not parse ID resp\n");
+		abort();
+	}
+
+	out = bsc_nat_rewrite_setup(nat, msg, parsed, imsi);
+	if (msg != out) {
+		fprintf(stderr, "FAIL: The message should not have been changed\n");
+		abort();
+	}
+
+	if (out->len != ARRAY_SIZE(cc_setup_international)) {
+		fprintf(stderr, "FAIL: Length of message changed\n");
+		abort();
+	}
+
+	if (memcmp(out->data, cc_setup_international, out->len) != 0) {
+		fprintf(stderr, "FAIL: Content modified..\n");
+		abort();
+	}
+	talloc_free(parsed);
+
+	/* verify that something in the message changes */
+	msgb_reset(msg);
+	copy_to_msg(msg, cc_setup_national, ARRAY_SIZE(cc_setup_national));
+	parsed = bsc_nat_parse(msg);
+	if (!parsed) {
+		fprintf(stderr, "FAIL: Could not parse ID resp\n");
+		abort();
+	}
+
+	out = bsc_nat_rewrite_setup(nat, msg, parsed, imsi);
+	if (!out) {
+		fprintf(stderr, "FAIL: A new message should be created.\n");
+		abort();
+	}
+
+	if (msg == out) {
+		fprintf(stderr, "FAIL: The message should have changed\n");
+		abort();
+	}
+
+	if (out->len != ARRAY_SIZE(cc_setup_national_patched)) {
+		fprintf(stderr, "FAIL: Length is wrong.\n");
+		abort();
+	}
+
+	if (memcmp(cc_setup_national_patched, out->data, out->len) != 0) {
+		fprintf(stderr, "FAIL: Data is wrong.\n");
+		fprintf(stderr, "Data was: %s\n", hexdump(out->data, out->len));
+		abort();
+	}
+
+	msgb_free(out);
+
+	/* Make sure that a wildcard is matching */
+	entry.mnc = "*";
+	msg = msgb_alloc(4096, "test_dt_filter");
+	copy_to_msg(msg, cc_setup_national, ARRAY_SIZE(cc_setup_national));
+	parsed = bsc_nat_parse(msg);
+	if (!parsed) {
+		fprintf(stderr, "FAIL: Could not parse ID resp\n");
+		abort();
+	}
+
+	out = bsc_nat_rewrite_setup(nat, msg, parsed, imsi);
+	if (!out) {
+		fprintf(stderr, "FAIL: A new message should be created.\n");
+		abort();
+	}
+
+	if (msg == out) {
+		fprintf(stderr, "FAIL: The message should have changed\n");
+		abort();
+	}
+
+	if (out->len != ARRAY_SIZE(cc_setup_national_patched)) {
+		fprintf(stderr, "FAIL: Length is wrong.\n");
+		abort();
+	}
+
+	if (memcmp(cc_setup_national_patched, out->data, out->len) != 0) {
+		fprintf(stderr, "FAIL: Data is wrong.\n");
+		fprintf(stderr, "Data was: %s\n", hexdump(out->data, out->len));
+		abort();
+	}
+
+	msgb_free(out);
+
+	/* Make sure that a wildcard is matching */
+	entry.mnc = "09";
+	msg = msgb_alloc(4096, "test_dt_filter");
+	copy_to_msg(msg, cc_setup_national, ARRAY_SIZE(cc_setup_national));
+	parsed = bsc_nat_parse(msg);
+	if (!parsed) {
+		fprintf(stderr, "FAIL: Could not parse ID resp\n");
+		abort();
+	}
+
+	out = bsc_nat_rewrite_setup(nat, msg, parsed, imsi);
+	if (out != msg) {
+		fprintf(stderr, "FAIL: The message should be unchanged.\n");
+		abort();
+	}
+
+	if (out->len != ARRAY_SIZE(cc_setup_national)) {
+		fprintf(stderr, "FAIL: Foo\n");
+		abort();
+	}
+
+	if (memcmp(out->data, cc_setup_national, ARRAY_SIZE(cc_setup_national)) != 0) {
+		fprintf(stderr, "FAIL: The message should really be unchanged.\n");
+		abort();
+	}
+
+	msgb_free(out);
+}
+
+int main(int argc, char **argv)
+{
+	struct log_target *stderr_target;
+
+	sccp_set_log_area(DSCCP);
+	log_init(&log_info);
+	stderr_target = log_target_create_stderr();
+	log_add_target(stderr_target);
+	log_set_all_filter(stderr_target, 1);
+
+	test_filter();
+	test_contrack();
+	test_paging();
+	test_mgcp_ass_tracking();
+	test_mgcp_find();
+	test_mgcp_rewrite();
+	test_mgcp_parse();
+	test_cr_filter();
+	test_dt_filter();
+	test_setup_rewrite();
+	test_mgcp_allocations();
+	return 0;
+}