Initial commit

41 files changed, 4317 insertions, 0 deletions

diff --git a/tests/.libs/bandwidth-client b/tests/.libs/bandwidth-client
new file mode 100755
index 0000000..4d82059
--- /dev/null
+++ b/tests/.libs/bandwidth-client
diff --git a/tests/.libs/bandwidth-server-many-up b/tests/.libs/bandwidth-server-many-up
new file mode 100755
index 0000000..9f3e0b5
--- /dev/null
+++ b/tests/.libs/bandwidth-server-many-up
diff --git a/tests/.libs/bandwidth-server-one b/tests/.libs/bandwidth-server-one
new file mode 100755
index 0000000..f14a514
--- /dev/null
+++ b/tests/.libs/bandwidth-server-one
diff --git a/tests/.libs/lt-random-test-client b/tests/.libs/lt-random-test-client
new file mode 100755
index 0000000..168d3c4
--- /dev/null
+++ b/tests/.libs/lt-random-test-client
diff --git a/tests/.libs/lt-unit-test-client b/tests/.libs/lt-unit-test-client
new file mode 100755
index 0000000..72c8ca1
--- /dev/null
+++ b/tests/.libs/lt-unit-test-client
diff --git a/tests/.libs/lt-unit-test-server b/tests/.libs/lt-unit-test-server
new file mode 100755
index 0000000..4a6d570
--- /dev/null
+++ b/tests/.libs/lt-unit-test-server
diff --git a/tests/.libs/lt-version b/tests/.libs/lt-version
new file mode 100755
index 0000000..7b81ff1
--- /dev/null
+++ b/tests/.libs/lt-version
diff --git a/tests/.libs/random-test-client b/tests/.libs/random-test-client
new file mode 100755
index 0000000..17d9c36
--- /dev/null
+++ b/tests/.libs/random-test-client
diff --git a/tests/.libs/random-test-server b/tests/.libs/random-test-server
new file mode 100755
index 0000000..d0d9010
--- /dev/null
+++ b/tests/.libs/random-test-server
diff --git a/tests/.libs/unit-test-client b/tests/.libs/unit-test-client
new file mode 100755
index 0000000..4920d69
--- /dev/null
+++ b/tests/.libs/unit-test-client
diff --git a/tests/.libs/unit-test-server b/tests/.libs/unit-test-server
new file mode 100755
index 0000000..6a426ab
--- /dev/null
+++ b/tests/.libs/unit-test-server
diff --git a/tests/.libs/version b/tests/.libs/version
new file mode 100755
index 0000000..c88ec66
--- /dev/null
+++ b/tests/.libs/version
diff --git a/tests/Makefile b/tests/Makefile
new file mode 100644
index 0000000..88d829e
--- /dev/null
+++ b/tests/Makefile
@@ -0,0 +1,585 @@
+# Makefile.in generated by automake 1.11.1 from Makefile.am.
+# tests/Makefile.  Generated from Makefile.in by configure.
+
+# 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.
+
+
+
+
+pkgdatadir = $(datadir)/libmodbus
+pkgincludedir = $(includedir)/libmodbus
+pkglibdir = $(libdir)/libmodbus
+pkglibexecdir = $(libexecdir)/libmodbus
+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 = :
+build_triplet = x86_64-pc-linux-gnu
+host_triplet = x86_64-pc-linux-gnu
+noinst_PROGRAMS = bandwidth-server-one$(EXEEXT) \
+	bandwidth-server-many-up$(EXEEXT) bandwidth-client$(EXEEXT) \
+	random-test-server$(EXEEXT) random-test-client$(EXEEXT) \
+	unit-test-server$(EXEEXT) unit-test-client$(EXEEXT) \
+	version$(EXEEXT)
+subdir = tests
+DIST_COMMON = README $(srcdir)/Makefile.am $(srcdir)/Makefile.in
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+am__aclocal_m4_deps = $(top_srcdir)/acinclude.m4 \
+	$(top_srcdir)/configure.ac
+am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
+	$(ACLOCAL_M4)
+mkinstalldirs = $(install_sh) -d
+CONFIG_HEADER = $(top_builddir)/config.h
+CONFIG_CLEAN_FILES =
+CONFIG_CLEAN_VPATH_FILES =
+PROGRAMS = $(noinst_PROGRAMS)
+am_bandwidth_client_OBJECTS = bandwidth-client.$(OBJEXT)
+bandwidth_client_OBJECTS = $(am_bandwidth_client_OBJECTS)
+bandwidth_client_DEPENDENCIES = $(common_ldflags)
+AM_V_lt = $(am__v_lt_$(V))
+am__v_lt_ = $(am__v_lt_$(AM_DEFAULT_VERBOSITY))
+am__v_lt_0 = --silent
+am_bandwidth_server_many_up_OBJECTS =  \
+	bandwidth-server-many-up.$(OBJEXT)
+bandwidth_server_many_up_OBJECTS =  \
+	$(am_bandwidth_server_many_up_OBJECTS)
+bandwidth_server_many_up_DEPENDENCIES = $(common_ldflags)
+am_bandwidth_server_one_OBJECTS = bandwidth-server-one.$(OBJEXT)
+bandwidth_server_one_OBJECTS = $(am_bandwidth_server_one_OBJECTS)
+bandwidth_server_one_DEPENDENCIES = $(common_ldflags)
+am_random_test_client_OBJECTS = random-test-client.$(OBJEXT)
+random_test_client_OBJECTS = $(am_random_test_client_OBJECTS)
+random_test_client_DEPENDENCIES = $(common_ldflags)
+am_random_test_server_OBJECTS = random-test-server.$(OBJEXT)
+random_test_server_OBJECTS = $(am_random_test_server_OBJECTS)
+random_test_server_DEPENDENCIES = $(common_ldflags)
+am_unit_test_client_OBJECTS = unit-test-client.$(OBJEXT)
+unit_test_client_OBJECTS = $(am_unit_test_client_OBJECTS)
+unit_test_client_DEPENDENCIES = $(common_ldflags)
+am_unit_test_server_OBJECTS = unit-test-server.$(OBJEXT)
+unit_test_server_OBJECTS = $(am_unit_test_server_OBJECTS)
+unit_test_server_DEPENDENCIES = $(common_ldflags)
+am_version_OBJECTS = version.$(OBJEXT)
+version_OBJECTS = $(am_version_OBJECTS)
+version_DEPENDENCIES = $(common_ldflags)
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+depcomp = $(SHELL) $(top_srcdir)/depcomp
+am__depfiles_maybe = depfiles
+am__mv = mv -f
+COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
+	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
+LTCOMPILE = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
+	$(LIBTOOLFLAGS) --mode=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    " $@;
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+am__v_at_ = $(am__v_at_$(AM_DEFAULT_VERBOSITY))
+am__v_at_0 = @
+CCLD = $(CC)
+LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
+	$(LIBTOOLFLAGS) --mode=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 = $(bandwidth_client_SOURCES) \
+	$(bandwidth_server_many_up_SOURCES) \
+	$(bandwidth_server_one_SOURCES) $(random_test_client_SOURCES) \
+	$(random_test_server_SOURCES) $(unit_test_client_SOURCES) \
+	$(unit_test_server_SOURCES) $(version_SOURCES)
+DIST_SOURCES = $(bandwidth_client_SOURCES) \
+	$(bandwidth_server_many_up_SOURCES) \
+	$(bandwidth_server_one_SOURCES) $(random_test_client_SOURCES) \
+	$(random_test_server_SOURCES) $(unit_test_client_SOURCES) \
+	$(unit_test_server_SOURCES) $(version_SOURCES)
+ETAGS = etags
+CTAGS = ctags
+DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
+ACLOCAL = ${SHELL} /home/jmccrohan/bin/libmodbus/missing --run aclocal-1.11
+AMTAR = ${SHELL} /home/jmccrohan/bin/libmodbus/missing --run tar
+AM_DEFAULT_VERBOSITY = 1
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+AS = as
+AUTOCONF = ${SHELL} /home/jmccrohan/bin/libmodbus/missing --run autoconf
+AUTOHEADER = ${SHELL} /home/jmccrohan/bin/libmodbus/missing --run autoheader
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+CXXFLAGS = -g -O2 -g -O2 -Wall
+CYGPATH_W = echo
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+DLLTOOL = false
+DSYMUTIL = 
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+ECHO_N = -n
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+FGREP = /bin/grep -F
+GREP = /bin/grep
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+INSTALL_DATA = ${INSTALL} -m 644
+INSTALL_PROGRAM = ${INSTALL}
+INSTALL_SCRIPT = ${INSTALL}
+INSTALL_STRIP_PROGRAM = $(install_sh) -c -s
+LD = /usr/bin/ld -m elf_x86_64
+LDFLAGS = 
+LIBMODBUS_LT_VERSION_INFO = 5:0:0
+LIBMODBUS_VERSION = 3.0.1
+LIBMODBUS_VERSION_MAJOR = 3
+LIBMODBUS_VERSION_MICRO = 1
+LIBMODBUS_VERSION_MINOR = 0
+LIBOBJS = 
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+LIPO = 
+LN_S = ln -s
+LTLIBOBJS = 
+MAKEINFO = ${SHELL} /home/jmccrohan/bin/libmodbus/missing --run makeinfo
+MANIFEST_TOOL = :
+MKDIR_P = /bin/mkdir -p
+NM = /usr/bin/nm -B
+NMEDIT = 
+OBJDUMP = objdump
+OBJEXT = o
+OTOOL = 
+OTOOL64 = 
+PACKAGE = libmodbus
+PACKAGE_BUGREPORT = https://github.com/stephane/libmodbus/issues
+PACKAGE_NAME = libmodbus
+PACKAGE_STRING = libmodbus 3.0.1
+PACKAGE_TARNAME = libmodbus
+PACKAGE_URL = 
+PACKAGE_VERSION = 3.0.1
+PATH_SEPARATOR = :
+RANLIB = ranlib
+SED = /bin/sed
+SET_MAKE = 
+SHELL = /bin/bash
+STRIP = strip
+VERSION = 3.0.1
+abs_builddir = /home/jmccrohan/bin/libmodbus/tests
+abs_srcdir = /home/jmccrohan/bin/libmodbus/tests
+abs_top_builddir = /home/jmccrohan/bin/libmodbus
+abs_top_srcdir = /home/jmccrohan/bin/libmodbus
+ac_ct_AR = ar
+ac_ct_CC = gcc
+ac_ct_CXX = g++
+ac_ct_DUMPBIN = 
+ac_libmodbus_have_asciidoc = yes
+ac_libmodbus_have_xmlto = yes
+am__include = include
+am__leading_dot = .
+am__quote = 
+am__tar = ${AMTAR} chof - "$$tardir"
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+build_alias = x86_64-linux-gnu
+build_cpu = x86_64
+build_os = linux-gnu
+build_vendor = pc
+builddir = .
+datadir = ${datarootdir}
+datarootdir = ${prefix}/share
+docdir = ${datarootdir}/doc/${PACKAGE_TARNAME}
+dvidir = ${docdir}
+exec_prefix = ${prefix}
+host = x86_64-pc-linux-gnu
+host_alias = 
+host_cpu = x86_64
+host_os = linux-gnu
+host_vendor = pc
+htmldir = ${docdir}
+includedir = ${prefix}/include
+infodir = ${prefix}/share/info
+install_sh = ${SHELL} /home/jmccrohan/bin/libmodbus/install-sh
+libdir = ${exec_prefix}/lib
+libexecdir = ${prefix}/lib/libmodbus
+localedir = ${datarootdir}/locale
+localstatedir = /var
+mandir = ${prefix}/share/man
+mkdir_p = /bin/mkdir -p
+oldincludedir = /usr/include
+pdfdir = ${docdir}
+prefix = /usr
+program_transform_name = s,x,x,
+psdir = ${docdir}
+sbindir = ${exec_prefix}/sbin
+sharedstatedir = ${prefix}/com
+srcdir = .
+sysconfdir = /etc
+target_alias = 
+top_build_prefix = ../
+top_builddir = ..
+top_srcdir = ..
+EXTRA_DIST = README
+common_ldflags = \
+	$(top_builddir)/src/libmodbus.la
+
+bandwidth_server_one_SOURCES = bandwidth-server-one.c
+bandwidth_server_one_LDADD = $(common_ldflags)
+bandwidth_server_many_up_SOURCES = bandwidth-server-many-up.c
+bandwidth_server_many_up_LDADD = $(common_ldflags)
+bandwidth_client_SOURCES = bandwidth-client.c
+bandwidth_client_LDADD = $(common_ldflags)
+random_test_server_SOURCES = random-test-server.c
+random_test_server_LDADD = $(common_ldflags)
+random_test_client_SOURCES = random-test-client.c
+random_test_client_LDADD = $(common_ldflags)
+unit_test_server_SOURCES = unit-test-server.c unit-test.h
+unit_test_server_LDADD = $(common_ldflags)
+unit_test_client_SOURCES = unit-test-client.c unit-test.h
+unit_test_client_LDADD = $(common_ldflags)
+version_SOURCES = version.c
+version_LDADD = $(common_ldflags)
+INCLUDES = -I$(top_srcdir) -I$(top_srcdir)/src
+CLEANFILES = *~
+all: all-am
+
+.SUFFIXES:
+.SUFFIXES: .c .lo .o .obj
+$(srcdir)/Makefile.in:  $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
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+	      exit 1;; \
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+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --foreign tests/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
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+	  *config.status*) \
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+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \
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+$(top_srcdir)/configure:  $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
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+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+
+clean-noinstPROGRAMS:
+	@list='$(noinst_PROGRAMS)'; test -n "$$list" || exit 0; \
+	echo " rm -f" $$list; \
+	rm -f $$list || exit $$?; \
+	test -n "$(EXEEXT)" || exit 0; \
+	list=`for p in $$list; do echo "$$p"; done | sed 's/$(EXEEXT)$$//'`; \
+	echo " rm -f" $$list; \
+	rm -f $$list
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+	@rm -f bandwidth-client$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(bandwidth_client_OBJECTS) $(bandwidth_client_LDADD) $(LIBS)
+bandwidth-server-many-up$(EXEEXT): $(bandwidth_server_many_up_OBJECTS) $(bandwidth_server_many_up_DEPENDENCIES) 
+	@rm -f bandwidth-server-many-up$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(bandwidth_server_many_up_OBJECTS) $(bandwidth_server_many_up_LDADD) $(LIBS)
+bandwidth-server-one$(EXEEXT): $(bandwidth_server_one_OBJECTS) $(bandwidth_server_one_DEPENDENCIES) 
+	@rm -f bandwidth-server-one$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(bandwidth_server_one_OBJECTS) $(bandwidth_server_one_LDADD) $(LIBS)
+random-test-client$(EXEEXT): $(random_test_client_OBJECTS) $(random_test_client_DEPENDENCIES) 
+	@rm -f random-test-client$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(random_test_client_OBJECTS) $(random_test_client_LDADD) $(LIBS)
+random-test-server$(EXEEXT): $(random_test_server_OBJECTS) $(random_test_server_DEPENDENCIES) 
+	@rm -f random-test-server$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(random_test_server_OBJECTS) $(random_test_server_LDADD) $(LIBS)
+unit-test-client$(EXEEXT): $(unit_test_client_OBJECTS) $(unit_test_client_DEPENDENCIES) 
+	@rm -f unit-test-client$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(unit_test_client_OBJECTS) $(unit_test_client_LDADD) $(LIBS)
+unit-test-server$(EXEEXT): $(unit_test_server_OBJECTS) $(unit_test_server_DEPENDENCIES) 
+	@rm -f unit-test-server$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(unit_test_server_OBJECTS) $(unit_test_server_LDADD) $(LIBS)
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+	@rm -f version$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(version_OBJECTS) $(version_LDADD) $(LIBS)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+#include ./$(DEPDIR)/bandwidth-client.Po
+#include ./$(DEPDIR)/bandwidth-server-many-up.Po
+#include ./$(DEPDIR)/bandwidth-server-one.Po
+#include ./$(DEPDIR)/random-test-client.Po
+#include ./$(DEPDIR)/random-test-server.Po
+#include ./$(DEPDIR)/unit-test-client.Po
+#include ./$(DEPDIR)/unit-test-server.Po
+#include ./$(DEPDIR)/version.Po
+
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+
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+#	source='$<' object='$@' libtool=yes 
+#	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) 
+	$(LTCOMPILE) -c -o $@ $<
+
+mostlyclean-libtool:
+	-rm -f *.lo
+
+clean-libtool:
+	-rm -rf .libs _libs
+
+ID: $(HEADERS) $(SOURCES) $(LISP) $(TAGS_FILES)
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+	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)  $(TAGS_DEPENDENCIES) \
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+	here=`pwd`; \
+	list='$(SOURCES) $(HEADERS)  $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
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+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
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+check: check-am
+all-am: Makefile $(PROGRAMS)
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+
+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='$(STRIP)'"` install
+mostlyclean-generic:
+
+clean-generic:
+	-test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
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+	@echo "This command is intended for maintainers to use"
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+clean-am: clean-generic clean-libtool clean-noinstPROGRAMS \
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+	clean-libtool clean-noinstPROGRAMS ctags distclean \
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+	install install-am install-data install-data-am install-dvi \
+	install-dvi-am install-exec install-exec-am install-html \
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new file mode 100644
index 0000000..2633873
--- /dev/null
+++ b/tests/Makefile.am
@@ -0,0 +1,41 @@
+EXTRA_DIST = README
+
+noinst_PROGRAMS = \
+	bandwidth-server-one \
+	bandwidth-server-many-up \
+	bandwidth-client \
+	random-test-server \
+	random-test-client \
+	unit-test-server \
+	unit-test-client \
+	version
+
+common_ldflags = \
+	$(top_builddir)/src/libmodbus.la
+
+bandwidth_server_one_SOURCES = bandwidth-server-one.c
+bandwidth_server_one_LDADD = $(common_ldflags)
+
+bandwidth_server_many_up_SOURCES = bandwidth-server-many-up.c
+bandwidth_server_many_up_LDADD = $(common_ldflags)
+
+bandwidth_client_SOURCES = bandwidth-client.c
+bandwidth_client_LDADD = $(common_ldflags)
+
+random_test_server_SOURCES = random-test-server.c
+random_test_server_LDADD = $(common_ldflags)
+
+random_test_client_SOURCES = random-test-client.c
+random_test_client_LDADD = $(common_ldflags)
+
+unit_test_server_SOURCES = unit-test-server.c unit-test.h
+unit_test_server_LDADD = $(common_ldflags)
+
+unit_test_client_SOURCES = unit-test-client.c unit-test.h
+unit_test_client_LDADD = $(common_ldflags)
+
+version_SOURCES = version.c
+version_LDADD = $(common_ldflags)
+
+INCLUDES = -I$(top_srcdir) -I$(top_srcdir)/src
+CLEANFILES = *~
diff --git a/tests/Makefile.in b/tests/Makefile.in
new file mode 100644
index 0000000..b06860f
--- /dev/null
+++ b/tests/Makefile.in
@@ -0,0 +1,585 @@
+# 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@
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+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
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+transform = $(program_transform_name)
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+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+noinst_PROGRAMS = bandwidth-server-one$(EXEEXT) \
+	bandwidth-server-many-up$(EXEEXT) bandwidth-client$(EXEEXT) \
+	random-test-server$(EXEEXT) random-test-client$(EXEEXT) \
+	unit-test-server$(EXEEXT) unit-test-client$(EXEEXT) \
+	version$(EXEEXT)
+subdir = tests
+DIST_COMMON = README $(srcdir)/Makefile.am $(srcdir)/Makefile.in
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+am__aclocal_m4_deps = $(top_srcdir)/acinclude.m4 \
+	$(top_srcdir)/configure.ac
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+CONFIG_CLEAN_VPATH_FILES =
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+	bandwidth-server-many-up.$(OBJEXT)
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+	$(random_test_server_SOURCES) $(unit_test_client_SOURCES) \
+	$(unit_test_server_SOURCES) $(version_SOURCES)
+DIST_SOURCES = $(bandwidth_client_SOURCES) \
+	$(bandwidth_server_many_up_SOURCES) \
+	$(bandwidth_server_one_SOURCES) $(random_test_client_SOURCES) \
+	$(random_test_server_SOURCES) $(unit_test_client_SOURCES) \
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+top_srcdir = @top_srcdir@
+EXTRA_DIST = README
+common_ldflags = \
+	$(top_builddir)/src/libmodbus.la
+
+bandwidth_server_one_SOURCES = bandwidth-server-one.c
+bandwidth_server_one_LDADD = $(common_ldflags)
+bandwidth_server_many_up_SOURCES = bandwidth-server-many-up.c
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+.SUFFIXES:
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+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
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+clean-noinstPROGRAMS:
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+bandwidth-client$(EXEEXT): $(bandwidth_client_OBJECTS) $(bandwidth_client_DEPENDENCIES) 
+	@rm -f bandwidth-client$(EXEEXT)
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+bandwidth-server-many-up$(EXEEXT): $(bandwidth_server_many_up_OBJECTS) $(bandwidth_server_many_up_DEPENDENCIES) 
+	@rm -f bandwidth-server-many-up$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(bandwidth_server_many_up_OBJECTS) $(bandwidth_server_many_up_LDADD) $(LIBS)
+bandwidth-server-one$(EXEEXT): $(bandwidth_server_one_OBJECTS) $(bandwidth_server_one_DEPENDENCIES) 
+	@rm -f bandwidth-server-one$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(bandwidth_server_one_OBJECTS) $(bandwidth_server_one_LDADD) $(LIBS)
+random-test-client$(EXEEXT): $(random_test_client_OBJECTS) $(random_test_client_DEPENDENCIES) 
+	@rm -f random-test-client$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(random_test_client_OBJECTS) $(random_test_client_LDADD) $(LIBS)
+random-test-server$(EXEEXT): $(random_test_server_OBJECTS) $(random_test_server_DEPENDENCIES) 
+	@rm -f random-test-server$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(random_test_server_OBJECTS) $(random_test_server_LDADD) $(LIBS)
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+	@rm -f unit-test-client$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(unit_test_client_OBJECTS) $(unit_test_client_LDADD) $(LIBS)
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+	@rm -f unit-test-server$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(unit_test_server_OBJECTS) $(unit_test_server_LDADD) $(LIBS)
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+	@rm -f version$(EXEEXT)
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+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/bandwidth-client.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/bandwidth-server-many-up.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/bandwidth-server-one.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/random-test-client.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/random-test-server.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/unit-test-client.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/unit-test-server.Po@am__quote@
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+
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+
+.c.lo:
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LTCOMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $<
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Plo
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+@am__fastdepCC_FALSE@	$(LTCOMPILE) -c -o $@ $<
+
+mostlyclean-libtool:
+	-rm -f *.lo
+
+clean-libtool:
+	-rm -rf .libs _libs
+
+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 $(PROGRAMS)
+installdirs:
+install: install-am
+install-exec: install-exec-am
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+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
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+	$(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='$(STRIP)'"` install
+mostlyclean-generic:
+
+clean-generic:
+	-test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libtool clean-noinstPROGRAMS \
+	mostlyclean-am
+
+distclean: distclean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
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+	distclean-tags
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+dvi: dvi-am
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+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
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+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
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+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS all all-am check check-am clean clean-generic \
+	clean-libtool clean-noinstPROGRAMS ctags distclean \
+	distclean-compile distclean-generic distclean-libtool \
+	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 \
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+	maintainer-clean maintainer-clean-generic mostlyclean \
+	mostlyclean-compile mostlyclean-generic mostlyclean-libtool \
+	pdf pdf-am ps ps-am tags uninstall uninstall-am
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+# 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/README b/tests/README
new file mode 100644
index 0000000..f530c8a
--- /dev/null
+++ b/tests/README
@@ -0,0 +1,38 @@
+Compilation
+-----------
+
+After installation, you can use pkg-config to compile these tests.
+For example, to compile random-test-server run:
+
+gcc random-test-server.c -o random-test-server `pkg-config --libs --cflags libmodbus`
+
+random-test-server
+-----------------
+It's necessary to launch this server before run random-test-client. By
+default, it receives and responses to Modbus query on the localhost
+and port 1502.
+
+random-test-client
+------------------
+This programm sends many different queries to a large range of
+addresses and values to test the communication between the client and
+the server.
+
+unit-test-server
+unit-test-client
+----------------
+By default, this program sends some queries with the values defined in
+unit-test.h and checks the responses. These programs are useful to
+test the protocol implementation.
+
+bandwidth-server-one
+bandwidth-server-many-up
+bandwidth-client
+-----------------------
+It returns some very useful informations about the performance of
+transfert rate between the server and the client.
+
+- bandwidth-server-one: it can handles only one connection with a client.
+- bandwidth-server-many-up: it opens a connection each time a new client asks
+  for, but the number of connection is limited. The same server process handles
+  all the connections.
diff --git a/tests/bandwidth-client b/tests/bandwidth-client
new file mode 100755
index 0000000..b013803
--- /dev/null
+++ b/tests/bandwidth-client
@@ -0,0 +1,225 @@
+#! /bin/bash
+
+# bandwidth-client - temporary wrapper script for .libs/bandwidth-client
+# Generated by libtool (GNU libtool) 2.4 Debian-2.4-3
+#
+# The bandwidth-client program cannot be directly executed until all the libtool
+# libraries that it depends on are installed.
+#
+# This wrapper script should never be moved out of the build directory.
+# If it is, it will not operate correctly.
+
+# Sed substitution that helps us do robust quoting.  It backslashifies
+# metacharacters that are still active within double-quoted strings.
+sed_quote_subst='s/\([`"$\\]\)/\\\1/g'
+
+# Be Bourne compatible
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
+  emulate sh
+  NULLCMD=:
+  # Zsh 3.x and 4.x performs word splitting on ${1+"$@"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '${1+"$@"}'='"$@"'
+  setopt NO_GLOB_SUBST
+else
+  case `(set -o) 2>/dev/null` in *posix*) set -o posix;; esac
+fi
+BIN_SH=xpg4; export BIN_SH # for Tru64
+DUALCASE=1; export DUALCASE # for MKS sh
+
+# The HP-UX ksh and POSIX shell print the target directory to stdout
+# if CDPATH is set.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+relink_command="(cd /home/jmccrohan/bin/libmodbus/tests; { test -z \"\${LIBRARY_PATH+set}\" || unset LIBRARY_PATH || { LIBRARY_PATH=; export LIBRARY_PATH; }; }; { test -z \"\${COMPILER_PATH+set}\" || unset COMPILER_PATH || { COMPILER_PATH=; export COMPILER_PATH; }; }; { test -z \"\${GCC_EXEC_PREFIX+set}\" || unset GCC_EXEC_PREFIX || { GCC_EXEC_PREFIX=; export GCC_EXEC_PREFIX; }; }; { test -z \"\${LD_RUN_PATH+set}\" || unset LD_RUN_PATH || { LD_RUN_PATH=; export LD_RUN_PATH; }; }; { test -z \"\${LD_LIBRARY_PATH+set}\" || unset LD_LIBRARY_PATH || { LD_LIBRARY_PATH=; export LD_LIBRARY_PATH; }; }; PATH=/usr/sbin:/usr/bin:/sbin:/bin:/usr/bin/X11; export PATH; gcc -g -O2 -g -O2 -Wall -Werror -o \$progdir/\$file bandwidth-client.o  ../src/.libs/libmodbus.so -Wl,-rpath -Wl,/home/jmccrohan/bin/libmodbus/src/.libs)"
+
+# This environment variable determines our operation mode.
+if test "$libtool_install_magic" = "%%%MAGIC variable%%%"; then
+  # install mode needs the following variables:
+  generated_by_libtool_version='2.4'
+  notinst_deplibs=' ../src/libmodbus.la'
+else
+  # When we are sourced in execute mode, $file and $ECHO are already set.
+  if test "$libtool_execute_magic" != "%%%MAGIC variable%%%"; then
+    file="$0"
+
+# A function that is used when there is no print builtin or printf.
+func_fallback_echo ()
+{
+  eval 'cat <<_LTECHO_EOF
+$1
+_LTECHO_EOF'
+}
+    ECHO="printf %s\\n"
+  fi
+
+# Very basic option parsing. These options are (a) specific to
+# the libtool wrapper, (b) are identical between the wrapper
+# /script/ and the wrapper /executable/ which is used only on
+# windows platforms, and (c) all begin with the string --lt-
+# (application programs are unlikely to have options which match
+# this pattern).
+#
+# There are only two supported options: --lt-debug and
+# --lt-dump-script. There is, deliberately, no --lt-help.
+#
+# The first argument to this parsing function should be the
+# script's ../libtool value, followed by no.
+lt_option_debug=
+func_parse_lt_options ()
+{
+  lt_script_arg0=$0
+  shift
+  for lt_opt
+  do
+    case "$lt_opt" in
+    --lt-debug) lt_option_debug=1 ;;
+    --lt-dump-script)
+        lt_dump_D=`$ECHO "X$lt_script_arg0" | /bin/sed -e 's/^X//' -e 's%/[^/]*$%%'`
+        test "X$lt_dump_D" = "X$lt_script_arg0" && lt_dump_D=.
+        lt_dump_F=`$ECHO "X$lt_script_arg0" | /bin/sed -e 's/^X//' -e 's%^.*/%%'`
+        cat "$lt_dump_D/$lt_dump_F"
+        exit 0
+      ;;
+    --lt-*)
+        $ECHO "Unrecognized --lt- option: '$lt_opt'" 1>&2
+        exit 1
+      ;;
+    esac
+  done
+
+  # Print the debug banner immediately:
+  if test -n "$lt_option_debug"; then
+    echo "bandwidth-client:bandwidth-client:${LINENO}: libtool wrapper (GNU libtool) 2.4 Debian-2.4-3" 1>&2
+  fi
+}
+
+# Used when --lt-debug. Prints its arguments to stdout
+# (redirection is the responsibility of the caller)
+func_lt_dump_args ()
+{
+  lt_dump_args_N=1;
+  for lt_arg
+  do
+    $ECHO "bandwidth-client:bandwidth-client:${LINENO}: newargv[$lt_dump_args_N]: $lt_arg"
+    lt_dump_args_N=`expr $lt_dump_args_N + 1`
+  done
+}
+
+# Core function for launching the target application
+func_exec_program_core ()
+{
+
+      if test -n "$lt_option_debug"; then
+        $ECHO "bandwidth-client:bandwidth-client:${LINENO}: newargv[0]: $progdir/$program" 1>&2
+        func_lt_dump_args ${1+"$@"} 1>&2
+      fi
+      exec "$progdir/$program" ${1+"$@"}
+
+      $ECHO "$0: cannot exec $program $*" 1>&2
+      exit 1
+}
+
+# A function to encapsulate launching the target application
+# Strips options in the --lt-* namespace from $@ and
+# launches target application with the remaining arguments.
+func_exec_program ()
+{
+  for lt_wr_arg
+  do
+    case $lt_wr_arg in
+    --lt-*) ;;
+    *) set x "$@" "$lt_wr_arg"; shift;;
+    esac
+    shift
+  done
+  func_exec_program_core ${1+"$@"}
+}
+
+  # Parse options
+  func_parse_lt_options "$0" ${1+"$@"}
+
+  # Find the directory that this script lives in.
+  thisdir=`$ECHO "$file" | /bin/sed 's%/[^/]*$%%'`
+  test "x$thisdir" = "x$file" && thisdir=.
+
+  # Follow symbolic links until we get to the real thisdir.
+  file=`ls -ld "$file" | /bin/sed -n 's/.*-> //p'`
+  while test -n "$file"; do
+    destdir=`$ECHO "$file" | /bin/sed 's%/[^/]*$%%'`
+
+    # If there was a directory component, then change thisdir.
+    if test "x$destdir" != "x$file"; then
+      case "$destdir" in
+      [\\/]* | [A-Za-z]:[\\/]*) thisdir="$destdir" ;;
+      *) thisdir="$thisdir/$destdir" ;;
+      esac
+    fi
+
+    file=`$ECHO "$file" | /bin/sed 's%^.*/%%'`
+    file=`ls -ld "$thisdir/$file" | /bin/sed -n 's/.*-> //p'`
+  done
+
+  # Usually 'no', except on cygwin/mingw when embedded into
+  # the cwrapper.
+  WRAPPER_SCRIPT_BELONGS_IN_OBJDIR=no
+  if test "$WRAPPER_SCRIPT_BELONGS_IN_OBJDIR" = "yes"; then
+    # special case for '.'
+    if test "$thisdir" = "."; then
+      thisdir=`pwd`
+    fi
+    # remove .libs from thisdir
+    case "$thisdir" in
+    *[\\/].libs ) thisdir=`$ECHO "$thisdir" | /bin/sed 's%[\\/][^\\/]*$%%'` ;;
+    .libs )   thisdir=. ;;
+    esac
+  fi
+
+  # Try to get the absolute directory name.
+  absdir=`cd "$thisdir" && pwd`
+  test -n "$absdir" && thisdir="$absdir"
+
+  program=lt-'bandwidth-client'
+  progdir="$thisdir/.libs"
+
+  if test ! -f "$progdir/$program" ||
+     { file=`ls -1dt "$progdir/$program" "$progdir/../$program" 2>/dev/null | /bin/sed 1q`; \
+       test "X$file" != "X$progdir/$program"; }; then
+
+    file="$$-$program"
+
+    if test ! -d "$progdir"; then
+      mkdir "$progdir"
+    else
+      rm -f "$progdir/$file"
+    fi
+
+    # relink executable if necessary
+    if test -n "$relink_command"; then
+      if relink_command_output=`eval $relink_command 2>&1`; then :
+      else
+	printf %s\n "$relink_command_output" >&2
+	rm -f "$progdir/$file"
+	exit 1
+      fi
+    fi
+
+    mv -f "$progdir/$file" "$progdir/$program" 2>/dev/null ||
+    { rm -f "$progdir/$program";
+      mv -f "$progdir/$file" "$progdir/$program"; }
+    rm -f "$progdir/$file"
+  fi
+
+  if test -f "$progdir/$program"; then
+    if test "$libtool_execute_magic" != "%%%MAGIC variable%%%"; then
+      # Run the actual program with our arguments.
+      func_exec_program ${1+"$@"}
+    fi
+  else
+    # The program doesn't exist.
+    $ECHO "$0: error: \`$progdir/$program' does not exist" 1>&2
+    $ECHO "This script is just a wrapper for $program." 1>&2
+    $ECHO "See the libtool documentation for more information." 1>&2
+    exit 1
+  fi
+fi
diff --git a/tests/bandwidth-client.c b/tests/bandwidth-client.c
new file mode 100644
index 0000000..e9109e1
--- /dev/null
+++ b/tests/bandwidth-client.c
@@ -0,0 +1,220 @@
+/*
+ * Copyright © 2008-2010 Stéphane Raimbault <stephane.raimbault@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU 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 General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <time.h>
+#include <sys/time.h>
+#include <errno.h>
+
+#include <modbus.h>
+
+#define G_MSEC_PER_SEC 1000
+
+uint32_t gettime_ms(void)
+{
+    struct timeval tv;
+    gettimeofday (&tv, NULL);
+
+    return (uint32_t) tv.tv_sec * 1000 + tv.tv_usec / 1000;
+}
+
+enum {
+    TCP,
+    RTU
+};
+
+/* Tests based on PI-MBUS-300 documentation */
+int main(int argc, char *argv[])
+{
+    uint8_t *tab_bit;
+    uint16_t *tab_reg;
+    modbus_t *ctx;
+    int i;
+    int nb_points;
+    double elapsed;
+    uint32_t start;
+    uint32_t end;
+    uint32_t bytes;
+    uint32_t rate;
+    int rc;
+    int n_loop;
+    int use_backend;
+
+    if (argc > 1) {
+        if (strcmp(argv[1], "tcp") == 0) {
+            use_backend = TCP;
+            n_loop = 100000;
+        } else if (strcmp(argv[1], "rtu") == 0) {
+            use_backend = RTU;
+            n_loop = 100;
+        } else {
+            printf("Usage:\n  %s [tcp|rtu] - Modbus client to measure data bandwith\n\n", argv[0]);
+            exit(1);
+        }
+    } else {
+        /* By default */
+        use_backend = TCP;
+        n_loop = 100000;
+    }
+
+    if (use_backend == TCP) {
+        ctx = modbus_new_tcp("127.0.0.1", 1502);
+    } else {
+        ctx = modbus_new_rtu("/dev/ttyUSB1", 115200, 'N', 8, 1);
+        modbus_set_slave(ctx, 1);
+    }
+    if (modbus_connect(ctx) == -1) {
+        fprintf(stderr, "Connexion failed: %s\n",
+                modbus_strerror(errno));
+        modbus_free(ctx);
+        return -1;
+    }
+
+    /* Allocate and initialize the memory to store the status */
+    tab_bit = (uint8_t *) malloc(MODBUS_MAX_READ_BITS * sizeof(uint8_t));
+    memset(tab_bit, 0, MODBUS_MAX_READ_BITS * sizeof(uint8_t));
+
+    /* Allocate and initialize the memory to store the registers */
+    tab_reg = (uint16_t *) malloc(MODBUS_MAX_READ_REGISTERS * sizeof(uint16_t));
+    memset(tab_reg, 0, MODBUS_MAX_READ_REGISTERS * sizeof(uint16_t));
+
+    printf("READ BITS\n\n");
+
+    nb_points = MODBUS_MAX_READ_BITS;
+    start = gettime_ms();
+    for (i=0; i<n_loop; i++) {
+        rc = modbus_read_bits(ctx, 0, nb_points, tab_bit);
+        if (rc == -1) {
+            fprintf(stderr, "%s\n", modbus_strerror(errno));
+            return -1;
+        }
+    }
+    end = gettime_ms();
+    elapsed = end - start;
+
+    rate = (n_loop * nb_points) * G_MSEC_PER_SEC / (end - start);
+    printf("Transfert rate in points/seconds:\n");
+    printf("* %d points/s\n", rate);
+    printf("\n");
+
+    bytes = n_loop * (nb_points / 8) + ((nb_points % 8) ? 1 : 0);
+    rate = bytes / 1024 * G_MSEC_PER_SEC / (end - start);
+    printf("Values:\n");
+    printf("* %d x %d values\n", n_loop, nb_points);
+    printf("* %.3f ms for %d bytes\n", elapsed, bytes);
+    printf("* %d KiB/s\n", rate);
+    printf("\n");
+
+    /* TCP: Query and reponse header and values */
+    bytes = 12 + 9 + (nb_points / 8) + ((nb_points % 8) ? 1 : 0);
+    printf("Values and TCP Modbus overhead:\n");
+    printf("* %d x %d bytes\n", n_loop, bytes);
+    bytes = n_loop * bytes;
+    rate = bytes / 1024 * G_MSEC_PER_SEC / (end - start);
+    printf("* %.3f ms for %d bytes\n", elapsed, bytes);
+    printf("* %d KiB/s\n", rate);
+    printf("\n\n");
+
+    printf("READ REGISTERS\n\n");
+
+    nb_points = MODBUS_MAX_READ_REGISTERS;
+    start = gettime_ms();
+    for (i=0; i<n_loop; i++) {
+        rc = modbus_read_registers(ctx, 0, nb_points, tab_reg);
+        if (rc == -1) {
+            fprintf(stderr, "%s\n", modbus_strerror(errno));
+            return -1;
+        }
+    }
+    end = gettime_ms();
+    elapsed = end - start;
+
+    rate = (n_loop * nb_points) * G_MSEC_PER_SEC / (end - start);
+    printf("Transfert rate in points/seconds:\n");
+    printf("* %d registers/s\n", rate);
+    printf("\n");
+
+    bytes = n_loop * nb_points * sizeof(uint16_t);
+    rate = bytes / 1024 * G_MSEC_PER_SEC / (end - start);
+    printf("Values:\n");
+    printf("* %d x %d values\n", n_loop, nb_points);
+    printf("* %.3f ms for %d bytes\n", elapsed, bytes);
+    printf("* %d KiB/s\n", rate);
+    printf("\n");
+
+    /* TCP:Query and reponse header and values */
+    bytes = 12 + 9 + (nb_points * sizeof(uint16_t));
+    printf("Values and TCP Modbus overhead:\n");
+    printf("* %d x %d bytes\n", n_loop, bytes);
+    bytes = n_loop * bytes;
+    rate = bytes / 1024 * G_MSEC_PER_SEC / (end - start);
+    printf("* %.3f ms for %d bytes\n", elapsed, bytes);
+    printf("* %d KiB/s\n", rate);
+    printf("\n\n");
+
+    printf("READ AND WRITE REGISTERS\n\n");
+
+    nb_points = MODBUS_MAX_RW_WRITE_REGISTERS;
+    start = gettime_ms();
+    for (i=0; i<n_loop; i++) {
+        rc = modbus_write_and_read_registers(ctx,
+                                             0, nb_points, tab_reg,
+                                             0, nb_points, tab_reg);
+        if (rc == -1) {
+            fprintf(stderr, "%s\n", modbus_strerror(errno));
+            return -1;
+        }
+    }
+    end = gettime_ms();
+    elapsed = end - start;
+
+    rate = (n_loop * nb_points) * G_MSEC_PER_SEC / (end - start);
+    printf("Transfert rate in points/seconds:\n");
+    printf("* %d registers/s\n", rate);
+    printf("\n");
+
+    bytes = n_loop * nb_points * sizeof(uint16_t);
+    rate = bytes / 1024 * G_MSEC_PER_SEC / (end - start);
+    printf("Values:\n");
+    printf("* %d x %d values\n", n_loop, nb_points);
+    printf("* %.3f ms for %d bytes\n", elapsed, bytes);
+    printf("* %d KiB/s\n", rate);
+    printf("\n");
+
+    /* TCP:Query and reponse header and values */
+    bytes = 12 + 9 + (nb_points * sizeof(uint16_t));
+    printf("Values and TCP Modbus overhead:\n");
+    printf("* %d x %d bytes\n", n_loop, bytes);
+    bytes = n_loop * bytes;
+    rate = bytes / 1024 * G_MSEC_PER_SEC / (end - start);
+    printf("* %.3f ms for %d bytes\n", elapsed, bytes);
+    printf("* %d KiB/s\n", rate);
+    printf("\n");
+
+    /* Free the memory */
+    free(tab_bit);
+    free(tab_reg);
+
+    /* Close the connection */
+    modbus_close(ctx);
+    modbus_free(ctx);
+
+    return 0;
+}
diff --git a/tests/bandwidth-client.o b/tests/bandwidth-client.o
new file mode 100644
index 0000000..9ff6b23
--- /dev/null
+++ b/tests/bandwidth-client.o
diff --git a/tests/bandwidth-server-many-up b/tests/bandwidth-server-many-up
new file mode 100755
index 0000000..85a88ea
--- /dev/null
+++ b/tests/bandwidth-server-many-up
@@ -0,0 +1,225 @@
+#! /bin/bash
+
+# bandwidth-server-many-up - temporary wrapper script for .libs/bandwidth-server-many-up
+# Generated by libtool (GNU libtool) 2.4 Debian-2.4-3
+#
+# The bandwidth-server-many-up program cannot be directly executed until all the libtool
+# libraries that it depends on are installed.
+#
+# This wrapper script should never be moved out of the build directory.
+# If it is, it will not operate correctly.
+
+# Sed substitution that helps us do robust quoting.  It backslashifies
+# metacharacters that are still active within double-quoted strings.
+sed_quote_subst='s/\([`"$\\]\)/\\\1/g'
+
+# Be Bourne compatible
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
+  emulate sh
+  NULLCMD=:
+  # Zsh 3.x and 4.x performs word splitting on ${1+"$@"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '${1+"$@"}'='"$@"'
+  setopt NO_GLOB_SUBST
+else
+  case `(set -o) 2>/dev/null` in *posix*) set -o posix;; esac
+fi
+BIN_SH=xpg4; export BIN_SH # for Tru64
+DUALCASE=1; export DUALCASE # for MKS sh
+
+# The HP-UX ksh and POSIX shell print the target directory to stdout
+# if CDPATH is set.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+relink_command="(cd /home/jmccrohan/bin/libmodbus/tests; { test -z \"\${LIBRARY_PATH+set}\" || unset LIBRARY_PATH || { LIBRARY_PATH=; export LIBRARY_PATH; }; }; { test -z \"\${COMPILER_PATH+set}\" || unset COMPILER_PATH || { COMPILER_PATH=; export COMPILER_PATH; }; }; { test -z \"\${GCC_EXEC_PREFIX+set}\" || unset GCC_EXEC_PREFIX || { GCC_EXEC_PREFIX=; export GCC_EXEC_PREFIX; }; }; { test -z \"\${LD_RUN_PATH+set}\" || unset LD_RUN_PATH || { LD_RUN_PATH=; export LD_RUN_PATH; }; }; { test -z \"\${LD_LIBRARY_PATH+set}\" || unset LD_LIBRARY_PATH || { LD_LIBRARY_PATH=; export LD_LIBRARY_PATH; }; }; PATH=/usr/sbin:/usr/bin:/sbin:/bin:/usr/bin/X11; export PATH; gcc -g -O2 -g -O2 -Wall -Werror -o \$progdir/\$file bandwidth-server-many-up.o  ../src/.libs/libmodbus.so -Wl,-rpath -Wl,/home/jmccrohan/bin/libmodbus/src/.libs)"
+
+# This environment variable determines our operation mode.
+if test "$libtool_install_magic" = "%%%MAGIC variable%%%"; then
+  # install mode needs the following variables:
+  generated_by_libtool_version='2.4'
+  notinst_deplibs=' ../src/libmodbus.la'
+else
+  # When we are sourced in execute mode, $file and $ECHO are already set.
+  if test "$libtool_execute_magic" != "%%%MAGIC variable%%%"; then
+    file="$0"
+
+# A function that is used when there is no print builtin or printf.
+func_fallback_echo ()
+{
+  eval 'cat <<_LTECHO_EOF
+$1
+_LTECHO_EOF'
+}
+    ECHO="printf %s\\n"
+  fi
+
+# Very basic option parsing. These options are (a) specific to
+# the libtool wrapper, (b) are identical between the wrapper
+# /script/ and the wrapper /executable/ which is used only on
+# windows platforms, and (c) all begin with the string --lt-
+# (application programs are unlikely to have options which match
+# this pattern).
+#
+# There are only two supported options: --lt-debug and
+# --lt-dump-script. There is, deliberately, no --lt-help.
+#
+# The first argument to this parsing function should be the
+# script's ../libtool value, followed by no.
+lt_option_debug=
+func_parse_lt_options ()
+{
+  lt_script_arg0=$0
+  shift
+  for lt_opt
+  do
+    case "$lt_opt" in
+    --lt-debug) lt_option_debug=1 ;;
+    --lt-dump-script)
+        lt_dump_D=`$ECHO "X$lt_script_arg0" | /bin/sed -e 's/^X//' -e 's%/[^/]*$%%'`
+        test "X$lt_dump_D" = "X$lt_script_arg0" && lt_dump_D=.
+        lt_dump_F=`$ECHO "X$lt_script_arg0" | /bin/sed -e 's/^X//' -e 's%^.*/%%'`
+        cat "$lt_dump_D/$lt_dump_F"
+        exit 0
+      ;;
+    --lt-*)
+        $ECHO "Unrecognized --lt- option: '$lt_opt'" 1>&2
+        exit 1
+      ;;
+    esac
+  done
+
+  # Print the debug banner immediately:
+  if test -n "$lt_option_debug"; then
+    echo "bandwidth-server-many-up:bandwidth-server-many-up:${LINENO}: libtool wrapper (GNU libtool) 2.4 Debian-2.4-3" 1>&2
+  fi
+}
+
+# Used when --lt-debug. Prints its arguments to stdout
+# (redirection is the responsibility of the caller)
+func_lt_dump_args ()
+{
+  lt_dump_args_N=1;
+  for lt_arg
+  do
+    $ECHO "bandwidth-server-many-up:bandwidth-server-many-up:${LINENO}: newargv[$lt_dump_args_N]: $lt_arg"
+    lt_dump_args_N=`expr $lt_dump_args_N + 1`
+  done
+}
+
+# Core function for launching the target application
+func_exec_program_core ()
+{
+
+      if test -n "$lt_option_debug"; then
+        $ECHO "bandwidth-server-many-up:bandwidth-server-many-up:${LINENO}: newargv[0]: $progdir/$program" 1>&2
+        func_lt_dump_args ${1+"$@"} 1>&2
+      fi
+      exec "$progdir/$program" ${1+"$@"}
+
+      $ECHO "$0: cannot exec $program $*" 1>&2
+      exit 1
+}
+
+# A function to encapsulate launching the target application
+# Strips options in the --lt-* namespace from $@ and
+# launches target application with the remaining arguments.
+func_exec_program ()
+{
+  for lt_wr_arg
+  do
+    case $lt_wr_arg in
+    --lt-*) ;;
+    *) set x "$@" "$lt_wr_arg"; shift;;
+    esac
+    shift
+  done
+  func_exec_program_core ${1+"$@"}
+}
+
+  # Parse options
+  func_parse_lt_options "$0" ${1+"$@"}
+
+  # Find the directory that this script lives in.
+  thisdir=`$ECHO "$file" | /bin/sed 's%/[^/]*$%%'`
+  test "x$thisdir" = "x$file" && thisdir=.
+
+  # Follow symbolic links until we get to the real thisdir.
+  file=`ls -ld "$file" | /bin/sed -n 's/.*-> //p'`
+  while test -n "$file"; do
+    destdir=`$ECHO "$file" | /bin/sed 's%/[^/]*$%%'`
+
+    # If there was a directory component, then change thisdir.
+    if test "x$destdir" != "x$file"; then
+      case "$destdir" in
+      [\\/]* | [A-Za-z]:[\\/]*) thisdir="$destdir" ;;
+      *) thisdir="$thisdir/$destdir" ;;
+      esac
+    fi
+
+    file=`$ECHO "$file" | /bin/sed 's%^.*/%%'`
+    file=`ls -ld "$thisdir/$file" | /bin/sed -n 's/.*-> //p'`
+  done
+
+  # Usually 'no', except on cygwin/mingw when embedded into
+  # the cwrapper.
+  WRAPPER_SCRIPT_BELONGS_IN_OBJDIR=no
+  if test "$WRAPPER_SCRIPT_BELONGS_IN_OBJDIR" = "yes"; then
+    # special case for '.'
+    if test "$thisdir" = "."; then
+      thisdir=`pwd`
+    fi
+    # remove .libs from thisdir
+    case "$thisdir" in
+    *[\\/].libs ) thisdir=`$ECHO "$thisdir" | /bin/sed 's%[\\/][^\\/]*$%%'` ;;
+    .libs )   thisdir=. ;;
+    esac
+  fi
+
+  # Try to get the absolute directory name.
+  absdir=`cd "$thisdir" && pwd`
+  test -n "$absdir" && thisdir="$absdir"
+
+  program=lt-'bandwidth-server-many-up'
+  progdir="$thisdir/.libs"
+
+  if test ! -f "$progdir/$program" ||
+     { file=`ls -1dt "$progdir/$program" "$progdir/../$program" 2>/dev/null | /bin/sed 1q`; \
+       test "X$file" != "X$progdir/$program"; }; then
+
+    file="$$-$program"
+
+    if test ! -d "$progdir"; then
+      mkdir "$progdir"
+    else
+      rm -f "$progdir/$file"
+    fi
+
+    # relink executable if necessary
+    if test -n "$relink_command"; then
+      if relink_command_output=`eval $relink_command 2>&1`; then :
+      else
+	printf %s\n "$relink_command_output" >&2
+	rm -f "$progdir/$file"
+	exit 1
+      fi
+    fi
+
+    mv -f "$progdir/$file" "$progdir/$program" 2>/dev/null ||
+    { rm -f "$progdir/$program";
+      mv -f "$progdir/$file" "$progdir/$program"; }
+    rm -f "$progdir/$file"
+  fi
+
+  if test -f "$progdir/$program"; then
+    if test "$libtool_execute_magic" != "%%%MAGIC variable%%%"; then
+      # Run the actual program with our arguments.
+      func_exec_program ${1+"$@"}
+    fi
+  else
+    # The program doesn't exist.
+    $ECHO "$0: error: \`$progdir/$program' does not exist" 1>&2
+    $ECHO "This script is just a wrapper for $program." 1>&2
+    $ECHO "See the libtool documentation for more information." 1>&2
+    exit 1
+  fi
+fi
diff --git a/tests/bandwidth-server-many-up.c b/tests/bandwidth-server-many-up.c
new file mode 100644
index 0000000..02968c1
--- /dev/null
+++ b/tests/bandwidth-server-many-up.c
@@ -0,0 +1,143 @@
+/*
+ * Copyright © 2009-2010 Stéphane Raimbault <stephane.raimbault@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU 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 General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <signal.h>
+
+#include <modbus.h>
+
+#if defined(_WIN32)
+#include <ws2tcpip.h>
+#else
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#endif
+
+#define NB_CONNECTION    5
+
+modbus_t *ctx = NULL;
+int server_socket;
+modbus_mapping_t *mb_mapping;
+
+static void close_sigint(int dummy)
+{
+    close(server_socket);
+    modbus_free(ctx);
+    modbus_mapping_free(mb_mapping);
+
+    exit(dummy);
+}
+
+int main(void)
+{
+    int master_socket;
+    int rc;
+    fd_set refset;
+    fd_set rdset;
+
+    /* Maximum file descriptor number */
+    int fdmax;
+
+    ctx = modbus_new_tcp("127.0.0.1", 1502);
+
+    mb_mapping = modbus_mapping_new(MODBUS_MAX_READ_BITS, 0,
+                                    MODBUS_MAX_READ_REGISTERS, 0);
+    if (mb_mapping == NULL) {
+        fprintf(stderr, "Failed to allocate the mapping: %s\n",
+                modbus_strerror(errno));
+        modbus_free(ctx);
+        return -1;
+    }
+
+    server_socket = modbus_tcp_listen(ctx, NB_CONNECTION);
+
+    signal(SIGINT, close_sigint);
+
+    /* Clear the reference set of socket */
+    FD_ZERO(&refset);
+    /* Add the server socket */
+    FD_SET(server_socket, &refset);
+
+    /* Keep track of the max file descriptor */
+    fdmax = server_socket;
+
+    for (;;) {
+        rdset = refset;
+        if (select(fdmax+1, &rdset, NULL, NULL, NULL) == -1) {
+            perror("Server select() failure.");
+            close_sigint(1);
+        }
+
+        /* Run through the existing connections looking for data to be
+         * read */
+        for (master_socket = 0; master_socket <= fdmax; master_socket++) {
+
+            if (FD_ISSET(master_socket, &rdset)) {
+                if (master_socket == server_socket) {
+                    /* A client is asking a new connection */
+                    socklen_t addrlen;
+                    struct sockaddr_in clientaddr;
+                    int newfd;
+
+                    /* Handle new connections */
+                    addrlen = sizeof(clientaddr);
+                    memset(&clientaddr, 0, sizeof(clientaddr));
+                    newfd = accept(server_socket, (struct sockaddr *)&clientaddr, &addrlen);
+                    if (newfd == -1) {
+                        perror("Server accept() error");
+                    } else {
+                        FD_SET(newfd, &refset);
+
+                        if (newfd > fdmax) {
+                            /* Keep track of the maximum */
+                            fdmax = newfd;
+                        }
+                        printf("New connection from %s:%d on socket %d\n",
+                               inet_ntoa(clientaddr.sin_addr), clientaddr.sin_port, newfd);
+                    }
+                } else {
+                    /* An already connected master has sent a new query */
+                    uint8_t query[MODBUS_TCP_MAX_ADU_LENGTH];
+
+                    modbus_set_socket(ctx, master_socket);
+                    rc = modbus_receive(ctx, query);
+                    if (rc != -1) {
+                        modbus_reply(ctx, query, rc, mb_mapping);
+                    } else {
+                        /* Connection closed by the client, end of server */
+                        printf("Connection closed on socket %d\n", master_socket);
+                        close(master_socket);
+
+                        /* Remove from reference set */
+                        FD_CLR(master_socket, &refset);
+
+                        if (master_socket == fdmax) {
+                            fdmax--;
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    return 0;
+}
diff --git a/tests/bandwidth-server-many-up.o b/tests/bandwidth-server-many-up.o
new file mode 100644
index 0000000..0b6254d
--- /dev/null
+++ b/tests/bandwidth-server-many-up.o
diff --git a/tests/bandwidth-server-one b/tests/bandwidth-server-one
new file mode 100755
index 0000000..4aa0039
--- /dev/null
+++ b/tests/bandwidth-server-one
@@ -0,0 +1,225 @@
+#! /bin/bash
+
+# bandwidth-server-one - temporary wrapper script for .libs/bandwidth-server-one
+# Generated by libtool (GNU libtool) 2.4 Debian-2.4-3
+#
+# The bandwidth-server-one program cannot be directly executed until all the libtool
+# libraries that it depends on are installed.
+#
+# This wrapper script should never be moved out of the build directory.
+# If it is, it will not operate correctly.
+
+# Sed substitution that helps us do robust quoting.  It backslashifies
+# metacharacters that are still active within double-quoted strings.
+sed_quote_subst='s/\([`"$\\]\)/\\\1/g'
+
+# Be Bourne compatible
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
+  emulate sh
+  NULLCMD=:
+  # Zsh 3.x and 4.x performs word splitting on ${1+"$@"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '${1+"$@"}'='"$@"'
+  setopt NO_GLOB_SUBST
+else
+  case `(set -o) 2>/dev/null` in *posix*) set -o posix;; esac
+fi
+BIN_SH=xpg4; export BIN_SH # for Tru64
+DUALCASE=1; export DUALCASE # for MKS sh
+
+# The HP-UX ksh and POSIX shell print the target directory to stdout
+# if CDPATH is set.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+relink_command="(cd /home/jmccrohan/bin/libmodbus/tests; { test -z \"\${LIBRARY_PATH+set}\" || unset LIBRARY_PATH || { LIBRARY_PATH=; export LIBRARY_PATH; }; }; { test -z \"\${COMPILER_PATH+set}\" || unset COMPILER_PATH || { COMPILER_PATH=; export COMPILER_PATH; }; }; { test -z \"\${GCC_EXEC_PREFIX+set}\" || unset GCC_EXEC_PREFIX || { GCC_EXEC_PREFIX=; export GCC_EXEC_PREFIX; }; }; { test -z \"\${LD_RUN_PATH+set}\" || unset LD_RUN_PATH || { LD_RUN_PATH=; export LD_RUN_PATH; }; }; { test -z \"\${LD_LIBRARY_PATH+set}\" || unset LD_LIBRARY_PATH || { LD_LIBRARY_PATH=; export LD_LIBRARY_PATH; }; }; PATH=/usr/sbin:/usr/bin:/sbin:/bin:/usr/bin/X11; export PATH; gcc -g -O2 -g -O2 -Wall -Werror -o \$progdir/\$file bandwidth-server-one.o  ../src/.libs/libmodbus.so -Wl,-rpath -Wl,/home/jmccrohan/bin/libmodbus/src/.libs)"
+
+# This environment variable determines our operation mode.
+if test "$libtool_install_magic" = "%%%MAGIC variable%%%"; then
+  # install mode needs the following variables:
+  generated_by_libtool_version='2.4'
+  notinst_deplibs=' ../src/libmodbus.la'
+else
+  # When we are sourced in execute mode, $file and $ECHO are already set.
+  if test "$libtool_execute_magic" != "%%%MAGIC variable%%%"; then
+    file="$0"
+
+# A function that is used when there is no print builtin or printf.
+func_fallback_echo ()
+{
+  eval 'cat <<_LTECHO_EOF
+$1
+_LTECHO_EOF'
+}
+    ECHO="printf %s\\n"
+  fi
+
+# Very basic option parsing. These options are (a) specific to
+# the libtool wrapper, (b) are identical between the wrapper
+# /script/ and the wrapper /executable/ which is used only on
+# windows platforms, and (c) all begin with the string --lt-
+# (application programs are unlikely to have options which match
+# this pattern).
+#
+# There are only two supported options: --lt-debug and
+# --lt-dump-script. There is, deliberately, no --lt-help.
+#
+# The first argument to this parsing function should be the
+# script's ../libtool value, followed by no.
+lt_option_debug=
+func_parse_lt_options ()
+{
+  lt_script_arg0=$0
+  shift
+  for lt_opt
+  do
+    case "$lt_opt" in
+    --lt-debug) lt_option_debug=1 ;;
+    --lt-dump-script)
+        lt_dump_D=`$ECHO "X$lt_script_arg0" | /bin/sed -e 's/^X//' -e 's%/[^/]*$%%'`
+        test "X$lt_dump_D" = "X$lt_script_arg0" && lt_dump_D=.
+        lt_dump_F=`$ECHO "X$lt_script_arg0" | /bin/sed -e 's/^X//' -e 's%^.*/%%'`
+        cat "$lt_dump_D/$lt_dump_F"
+        exit 0
+      ;;
+    --lt-*)
+        $ECHO "Unrecognized --lt- option: '$lt_opt'" 1>&2
+        exit 1
+      ;;
+    esac
+  done
+
+  # Print the debug banner immediately:
+  if test -n "$lt_option_debug"; then
+    echo "bandwidth-server-one:bandwidth-server-one:${LINENO}: libtool wrapper (GNU libtool) 2.4 Debian-2.4-3" 1>&2
+  fi
+}
+
+# Used when --lt-debug. Prints its arguments to stdout
+# (redirection is the responsibility of the caller)
+func_lt_dump_args ()
+{
+  lt_dump_args_N=1;
+  for lt_arg
+  do
+    $ECHO "bandwidth-server-one:bandwidth-server-one:${LINENO}: newargv[$lt_dump_args_N]: $lt_arg"
+    lt_dump_args_N=`expr $lt_dump_args_N + 1`
+  done
+}
+
+# Core function for launching the target application
+func_exec_program_core ()
+{
+
+      if test -n "$lt_option_debug"; then
+        $ECHO "bandwidth-server-one:bandwidth-server-one:${LINENO}: newargv[0]: $progdir/$program" 1>&2
+        func_lt_dump_args ${1+"$@"} 1>&2
+      fi
+      exec "$progdir/$program" ${1+"$@"}
+
+      $ECHO "$0: cannot exec $program $*" 1>&2
+      exit 1
+}
+
+# A function to encapsulate launching the target application
+# Strips options in the --lt-* namespace from $@ and
+# launches target application with the remaining arguments.
+func_exec_program ()
+{
+  for lt_wr_arg
+  do
+    case $lt_wr_arg in
+    --lt-*) ;;
+    *) set x "$@" "$lt_wr_arg"; shift;;
+    esac
+    shift
+  done
+  func_exec_program_core ${1+"$@"}
+}
+
+  # Parse options
+  func_parse_lt_options "$0" ${1+"$@"}
+
+  # Find the directory that this script lives in.
+  thisdir=`$ECHO "$file" | /bin/sed 's%/[^/]*$%%'`
+  test "x$thisdir" = "x$file" && thisdir=.
+
+  # Follow symbolic links until we get to the real thisdir.
+  file=`ls -ld "$file" | /bin/sed -n 's/.*-> //p'`
+  while test -n "$file"; do
+    destdir=`$ECHO "$file" | /bin/sed 's%/[^/]*$%%'`
+
+    # If there was a directory component, then change thisdir.
+    if test "x$destdir" != "x$file"; then
+      case "$destdir" in
+      [\\/]* | [A-Za-z]:[\\/]*) thisdir="$destdir" ;;
+      *) thisdir="$thisdir/$destdir" ;;
+      esac
+    fi
+
+    file=`$ECHO "$file" | /bin/sed 's%^.*/%%'`
+    file=`ls -ld "$thisdir/$file" | /bin/sed -n 's/.*-> //p'`
+  done
+
+  # Usually 'no', except on cygwin/mingw when embedded into
+  # the cwrapper.
+  WRAPPER_SCRIPT_BELONGS_IN_OBJDIR=no
+  if test "$WRAPPER_SCRIPT_BELONGS_IN_OBJDIR" = "yes"; then
+    # special case for '.'
+    if test "$thisdir" = "."; then
+      thisdir=`pwd`
+    fi
+    # remove .libs from thisdir
+    case "$thisdir" in
+    *[\\/].libs ) thisdir=`$ECHO "$thisdir" | /bin/sed 's%[\\/][^\\/]*$%%'` ;;
+    .libs )   thisdir=. ;;
+    esac
+  fi
+
+  # Try to get the absolute directory name.
+  absdir=`cd "$thisdir" && pwd`
+  test -n "$absdir" && thisdir="$absdir"
+
+  program=lt-'bandwidth-server-one'
+  progdir="$thisdir/.libs"
+
+  if test ! -f "$progdir/$program" ||
+     { file=`ls -1dt "$progdir/$program" "$progdir/../$program" 2>/dev/null | /bin/sed 1q`; \
+       test "X$file" != "X$progdir/$program"; }; then
+
+    file="$$-$program"
+
+    if test ! -d "$progdir"; then
+      mkdir "$progdir"
+    else
+      rm -f "$progdir/$file"
+    fi
+
+    # relink executable if necessary
+    if test -n "$relink_command"; then
+      if relink_command_output=`eval $relink_command 2>&1`; then :
+      else
+	printf %s\n "$relink_command_output" >&2
+	rm -f "$progdir/$file"
+	exit 1
+      fi
+    fi
+
+    mv -f "$progdir/$file" "$progdir/$program" 2>/dev/null ||
+    { rm -f "$progdir/$program";
+      mv -f "$progdir/$file" "$progdir/$program"; }
+    rm -f "$progdir/$file"
+  fi
+
+  if test -f "$progdir/$program"; then
+    if test "$libtool_execute_magic" != "%%%MAGIC variable%%%"; then
+      # Run the actual program with our arguments.
+      func_exec_program ${1+"$@"}
+    fi
+  else
+    # The program doesn't exist.
+    $ECHO "$0: error: \`$progdir/$program' does not exist" 1>&2
+    $ECHO "This script is just a wrapper for $program." 1>&2
+    $ECHO "See the libtool documentation for more information." 1>&2
+    exit 1
+  fi
+fi
diff --git a/tests/bandwidth-server-one.c b/tests/bandwidth-server-one.c
new file mode 100644
index 0000000..e15fb69
--- /dev/null
+++ b/tests/bandwidth-server-one.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright © 2008-2010 Stéphane Raimbault <stephane.raimbault@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU 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 General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include <modbus.h>
+
+enum {
+    TCP,
+    RTU
+};
+
+int main(int argc, char *argv[])
+{
+    int socket;
+    modbus_t *ctx;
+    modbus_mapping_t *mb_mapping;
+    int rc;
+    int use_backend;
+
+     /* TCP */
+    if (argc > 1) {
+        if (strcmp(argv[1], "tcp") == 0) {
+            use_backend = TCP;
+        } else if (strcmp(argv[1], "rtu") == 0) {
+            use_backend = RTU;
+        } else {
+            printf("Usage:\n  %s [tcp|rtu] - Modbus client to measure data bandwith\n\n", argv[0]);
+            exit(1);
+        }
+    } else {
+        /* By default */
+        use_backend = TCP;
+    }
+
+    if (use_backend == TCP) {
+        ctx = modbus_new_tcp("127.0.0.1", 1502);
+        socket = modbus_tcp_listen(ctx, 1);
+        modbus_tcp_accept(ctx, &socket);
+
+    } else {
+        ctx = modbus_new_rtu("/dev/ttyUSB0", 115200, 'N', 8, 1);
+        modbus_set_slave(ctx, 1);
+        modbus_connect(ctx);
+    }
+
+    mb_mapping = modbus_mapping_new(MODBUS_MAX_READ_BITS, 0,
+                                    MODBUS_MAX_READ_REGISTERS, 0);
+    if (mb_mapping == NULL) {
+        fprintf(stderr, "Failed to allocate the mapping: %s\n",
+                modbus_strerror(errno));
+        modbus_free(ctx);
+        return -1;
+    }
+
+    for(;;) {
+        uint8_t query[MODBUS_TCP_MAX_ADU_LENGTH];
+
+        rc = modbus_receive(ctx, query);
+        if (rc >= 0) {
+            modbus_reply(ctx, query, rc, mb_mapping);
+        } else {
+            /* Connection closed by the client or server */
+            break;
+        }
+    }
+
+    printf("Quit the loop: %s\n", modbus_strerror(errno));
+
+    modbus_mapping_free(mb_mapping);
+    close(socket);
+    modbus_free(ctx);
+
+    return 0;
+}
diff --git a/tests/bandwidth-server-one.o b/tests/bandwidth-server-one.o
new file mode 100644
index 0000000..016e927
--- /dev/null
+++ b/tests/bandwidth-server-one.o
diff --git a/tests/random-test-client b/tests/random-test-client
new file mode 100755
index 0000000..d6291ee
--- /dev/null
+++ b/tests/random-test-client
diff --git a/tests/random-test-client.c b/tests/random-test-client.c
new file mode 100644
index 0000000..593867c
--- /dev/null
+++ b/tests/random-test-client.c
@@ -0,0 +1,253 @@
+/*
+ * Copyright © 2001-2010 Stéphane Raimbault <stephane.raimbault@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU 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 General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include <modbus.h>
+
+/* The goal of this program is to check all major functions of
+   libmodbus:
+   - write_coil
+   - read_bits
+   - write_coils
+   - write_register
+   - read_registers
+   - write_registers
+   - read_registers
+
+   All these functions are called with random values on a address
+   range defined by the following defines.
+*/
+#define LOOP             1
+#define SERVER_ID       17
+#define ADDRESS_START    0
+#define ADDRESS_END     99
+
+/* At each loop, the program works in the range ADDRESS_START to
+ * ADDRESS_END then ADDRESS_START + 1 to ADDRESS_END and so on.
+ */
+int main(void)
+{
+    modbus_t *ctx;
+    int rc;
+    int nb_fail;
+    int nb_loop;
+    int addr;
+    int nb;
+    uint8_t *tab_rq_bits;
+    uint8_t *tab_rp_bits;
+    uint16_t *tab_rq_registers;
+    uint16_t *tab_rw_rq_registers;
+    uint16_t *tab_rp_registers;
+
+    /* RTU */
+/*
+    ctx = modbus_new_rtu("/dev/ttyUSB0", 19200, 'N', 8, 1);
+    modbus_set_slave(ctx, SERVER_ID);
+*/
+
+    /* TCP */
+    ctx = modbus_new_tcp("127.0.0.1", 1502);
+    modbus_set_debug(ctx, TRUE);
+
+    if (modbus_connect(ctx) == -1) {
+        fprintf(stderr, "Connection failed: %s\n",
+                modbus_strerror(errno));
+        modbus_free(ctx);
+        return -1;
+    }
+
+    /* Allocate and initialize the different memory spaces */
+    nb = ADDRESS_END - ADDRESS_START;
+
+    tab_rq_bits = (uint8_t *) malloc(nb * sizeof(uint8_t));
+    memset(tab_rq_bits, 0, nb * sizeof(uint8_t));
+
+    tab_rp_bits = (uint8_t *) malloc(nb * sizeof(uint8_t));
+    memset(tab_rp_bits, 0, nb * sizeof(uint8_t));
+
+    tab_rq_registers = (uint16_t *) malloc(nb * sizeof(uint16_t));
+    memset(tab_rq_registers, 0, nb * sizeof(uint16_t));
+
+    tab_rp_registers = (uint16_t *) malloc(nb * sizeof(uint16_t));
+    memset(tab_rp_registers, 0, nb * sizeof(uint16_t));
+
+    tab_rw_rq_registers = (uint16_t *) malloc(nb * sizeof(uint16_t));
+    memset(tab_rw_rq_registers, 0, nb * sizeof(uint16_t));
+
+    nb_loop = nb_fail = 0;
+    while (nb_loop++ < LOOP) {
+        for (addr = ADDRESS_START; addr <= ADDRESS_END; addr++) {
+            int i;
+
+            /* Random numbers (short) */
+            for (i=0; i<nb; i++) {
+                tab_rq_registers[i] = (uint16_t) (65535.0*rand() / (RAND_MAX + 1.0));
+                tab_rw_rq_registers[i] = ~tab_rq_registers[i];
+                tab_rq_bits[i] = tab_rq_registers[i] % 2;
+            }
+            nb = ADDRESS_END - addr;
+
+            /* WRITE BIT */
+            rc = modbus_write_bit(ctx, addr, tab_rq_bits[0]);
+            if (rc != 1) {
+                printf("ERROR modbus_write_bit (%d)\n", rc);
+                printf("Address = %d, value = %d\n", addr, tab_rq_bits[0]);
+                nb_fail++;
+            } else {
+                rc = modbus_read_bits(ctx, addr, 1, tab_rp_bits);
+                if (rc != 1 || tab_rq_bits[0] != tab_rp_bits[0]) {
+                    printf("ERROR modbus_read_bits single (%d)\n", rc);
+                    printf("address = %d\n", addr);
+                    nb_fail++;
+                }
+            }
+
+            /* MULTIPLE BITS */
+            rc = modbus_write_bits(ctx, addr, nb, tab_rq_bits);
+            if (rc != nb) {
+                printf("ERROR modbus_write_bits (%d)\n", rc);
+                printf("Address = %d, nb = %d\n", addr, nb);
+                nb_fail++;
+            } else {
+                rc = modbus_read_bits(ctx, addr, nb, tab_rp_bits);
+                if (rc != nb) {
+                    printf("ERROR modbus_read_bits\n");
+                    printf("Address = %d, nb = %d\n", addr, nb);
+                    nb_fail++;
+                } else {
+                    for (i=0; i<nb; i++) {
+                        if (tab_rp_bits[i] != tab_rq_bits[i]) {
+                            printf("ERROR modbus_read_bits\n");
+                            printf("Address = %d, value %d (0x%X) != %d (0x%X)\n",
+                                   addr, tab_rq_bits[i], tab_rq_bits[i],
+                                   tab_rp_bits[i], tab_rp_bits[i]);
+                            nb_fail++;
+                        }
+                    }
+                }
+            }
+
+            /* SINGLE REGISTER */
+            rc = modbus_write_register(ctx, addr, tab_rq_registers[0]);
+            if (rc != 1) {
+                printf("ERROR modbus_write_register (%d)\n", rc);
+                printf("Address = %d, value = %d (0x%X)\n",
+                       addr, tab_rq_registers[0], tab_rq_registers[0]);
+                nb_fail++;
+            } else {
+                rc = modbus_read_registers(ctx, addr, 1, tab_rp_registers);
+                if (rc != 1) {
+                    printf("ERROR modbus_read_registers single (%d)\n", rc);
+                    printf("Address = %d\n", addr);
+                    nb_fail++;
+                } else {
+                    if (tab_rq_registers[0] != tab_rp_registers[0]) {
+                        printf("ERROR modbus_read_registers single\n");
+                        printf("Address = %d, value = %d (0x%X) != %d (0x%X)\n",
+                               addr, tab_rq_registers[0], tab_rq_registers[0],
+                               tab_rp_registers[0], tab_rp_registers[0]);
+                        nb_fail++;
+                    }
+                }
+            }
+
+            /* MULTIPLE REGISTERS */
+            rc = modbus_write_registers(ctx, addr, nb, tab_rq_registers);
+            if (rc != nb) {
+                printf("ERROR modbus_write_registers (%d)\n", rc);
+                printf("Address = %d, nb = %d\n", addr, nb);
+                nb_fail++;
+            } else {
+                rc = modbus_read_registers(ctx, addr, nb, tab_rp_registers);
+                if (rc != nb) {
+                    printf("ERROR modbus_read_registers (%d)\n", rc);
+                    printf("Address = %d, nb = %d\n", addr, nb);
+                    nb_fail++;
+                } else {
+                    for (i=0; i<nb; i++) {
+                        if (tab_rq_registers[i] != tab_rp_registers[i]) {
+                            printf("ERROR modbus_read_registers\n");
+                            printf("Address = %d, value %d (0x%X) != %d (0x%X)\n",
+                                   addr, tab_rq_registers[i], tab_rq_registers[i],
+                                   tab_rp_registers[i], tab_rp_registers[i]);
+                            nb_fail++;
+                        }
+                    }
+                }
+            }
+            /* R/W MULTIPLE REGISTERS */
+            rc = modbus_write_and_read_registers(ctx,
+                                                 addr, nb, tab_rw_rq_registers,
+                                                 addr, nb, tab_rp_registers);
+            if (rc != nb) {
+                printf("ERROR modbus_read_and_write_registers (%d)\n", rc);
+                printf("Address = %d, nb = %d\n", addr, nb);
+                nb_fail++;
+            } else {
+                for (i=0; i<nb; i++) {
+                    if (tab_rp_registers[i] != tab_rw_rq_registers[i]) {
+                        printf("ERROR modbus_read_and_write_registers READ\n");
+                        printf("Address = %d, value %d (0x%X) != %d (0x%X)\n",
+                               addr, tab_rp_registers[i], tab_rw_rq_registers[i],
+                               tab_rp_registers[i], tab_rw_rq_registers[i]);
+                        nb_fail++;
+                    }
+                }
+
+                rc = modbus_read_registers(ctx, addr, nb, tab_rp_registers);
+                if (rc != nb) {
+                    printf("ERROR modbus_read_registers (%d)\n", rc);
+                    printf("Address = %d, nb = %d\n", addr, nb);
+                    nb_fail++;
+                } else {
+                    for (i=0; i<nb; i++) {
+                        if (tab_rw_rq_registers[i] != tab_rp_registers[i]) {
+                            printf("ERROR modbus_read_and_write_registers WRITE\n");
+                            printf("Address = %d, value %d (0x%X) != %d (0x%X)\n",
+                                   addr, tab_rw_rq_registers[i], tab_rw_rq_registers[i],
+                                   tab_rp_registers[i], tab_rp_registers[i]);
+                            nb_fail++;
+                        }
+                    }
+                }
+            }
+        }
+
+        printf("Test: ");
+        if (nb_fail)
+            printf("%d FAILS\n", nb_fail);
+        else
+            printf("SUCCESS\n");
+    }
+
+    /* Free the memory */
+    free(tab_rq_bits);
+    free(tab_rp_bits);
+    free(tab_rq_registers);
+    free(tab_rp_registers);
+
+    /* Close the connection */
+    modbus_close(ctx);
+    modbus_free(ctx);
+
+    return 0;
+}
diff --git a/tests/random-test-client.o b/tests/random-test-client.o
new file mode 100644
index 0000000..b9ddf6f
--- /dev/null
+++ b/tests/random-test-client.o
diff --git a/tests/random-test-server b/tests/random-test-server
new file mode 100755
index 0000000..5beca61
--- /dev/null
+++ b/tests/random-test-server
diff --git a/tests/random-test-server.c b/tests/random-test-server.c
new file mode 100644
index 0000000..9569fe4
--- /dev/null
+++ b/tests/random-test-server.c
@@ -0,0 +1,66 @@
+/*
+ * Copyright © 2008-2010 Stéphane Raimbault <stephane.raimbault@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU 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 General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include <modbus.h>
+
+int main(void)
+{
+    int socket;
+    modbus_t *ctx;
+    modbus_mapping_t *mb_mapping;
+
+    ctx = modbus_new_tcp("127.0.0.1", 1502);
+    /* modbus_set_debug(ctx, TRUE); */
+
+    mb_mapping = modbus_mapping_new(500, 500, 500, 500);
+    if (mb_mapping == NULL) {
+        fprintf(stderr, "Failed to allocate the mapping: %s\n",
+                modbus_strerror(errno));
+        modbus_free(ctx);
+        return -1;
+    }
+
+    socket = modbus_tcp_listen(ctx, 1);
+    modbus_tcp_accept(ctx, &socket);
+
+    for (;;) {
+        uint8_t query[MODBUS_TCP_MAX_ADU_LENGTH];
+        int rc;
+
+        rc = modbus_receive(ctx, query);
+        if (rc != -1) {
+            /* rc is the query size */
+            modbus_reply(ctx, query, rc, mb_mapping);
+        } else {
+            /* Connection closed by the client or error */
+            break;
+        }
+    }
+
+    printf("Quit the loop: %s\n", modbus_strerror(errno));
+
+    modbus_mapping_free(mb_mapping);
+    modbus_close(ctx);
+    modbus_free(ctx);
+
+    return 0;
+}
diff --git a/tests/random-test-server.o b/tests/random-test-server.o
new file mode 100644
index 0000000..7ea92e9
--- /dev/null
+++ b/tests/random-test-server.o
diff --git a/tests/unit-test-client b/tests/unit-test-client
new file mode 100755
index 0000000..4e2b561
--- /dev/null
+++ b/tests/unit-test-client
@@ -0,0 +1,225 @@
+#! /bin/bash
+
+# unit-test-client - temporary wrapper script for .libs/unit-test-client
+# Generated by libtool (GNU libtool) 2.4 Debian-2.4-3
+#
+# The unit-test-client program cannot be directly executed until all the libtool
+# libraries that it depends on are installed.
+#
+# This wrapper script should never be moved out of the build directory.
+# If it is, it will not operate correctly.
+
+# Sed substitution that helps us do robust quoting.  It backslashifies
+# metacharacters that are still active within double-quoted strings.
+sed_quote_subst='s/\([`"$\\]\)/\\\1/g'
+
+# Be Bourne compatible
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
+  emulate sh
+  NULLCMD=:
+  # Zsh 3.x and 4.x performs word splitting on ${1+"$@"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '${1+"$@"}'='"$@"'
+  setopt NO_GLOB_SUBST
+else
+  case `(set -o) 2>/dev/null` in *posix*) set -o posix;; esac
+fi
+BIN_SH=xpg4; export BIN_SH # for Tru64
+DUALCASE=1; export DUALCASE # for MKS sh
+
+# The HP-UX ksh and POSIX shell print the target directory to stdout
+# if CDPATH is set.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+relink_command="(cd /home/jmccrohan/bin/libmodbus/tests; { test -z \"\${LIBRARY_PATH+set}\" || unset LIBRARY_PATH || { LIBRARY_PATH=; export LIBRARY_PATH; }; }; { test -z \"\${COMPILER_PATH+set}\" || unset COMPILER_PATH || { COMPILER_PATH=; export COMPILER_PATH; }; }; { test -z \"\${GCC_EXEC_PREFIX+set}\" || unset GCC_EXEC_PREFIX || { GCC_EXEC_PREFIX=; export GCC_EXEC_PREFIX; }; }; { test -z \"\${LD_RUN_PATH+set}\" || unset LD_RUN_PATH || { LD_RUN_PATH=; export LD_RUN_PATH; }; }; { test -z \"\${LD_LIBRARY_PATH+set}\" || unset LD_LIBRARY_PATH || { LD_LIBRARY_PATH=; export LD_LIBRARY_PATH; }; }; PATH=/usr/sbin:/usr/bin:/sbin:/bin:/usr/bin/X11; export PATH; gcc -g -O2 -g -O2 -Wall -Werror -o \$progdir/\$file unit-test-client.o  ../src/.libs/libmodbus.so -Wl,-rpath -Wl,/home/jmccrohan/bin/libmodbus/src/.libs)"
+
+# This environment variable determines our operation mode.
+if test "$libtool_install_magic" = "%%%MAGIC variable%%%"; then
+  # install mode needs the following variables:
+  generated_by_libtool_version='2.4'
+  notinst_deplibs=' ../src/libmodbus.la'
+else
+  # When we are sourced in execute mode, $file and $ECHO are already set.
+  if test "$libtool_execute_magic" != "%%%MAGIC variable%%%"; then
+    file="$0"
+
+# A function that is used when there is no print builtin or printf.
+func_fallback_echo ()
+{
+  eval 'cat <<_LTECHO_EOF
+$1
+_LTECHO_EOF'
+}
+    ECHO="printf %s\\n"
+  fi
+
+# Very basic option parsing. These options are (a) specific to
+# the libtool wrapper, (b) are identical between the wrapper
+# /script/ and the wrapper /executable/ which is used only on
+# windows platforms, and (c) all begin with the string --lt-
+# (application programs are unlikely to have options which match
+# this pattern).
+#
+# There are only two supported options: --lt-debug and
+# --lt-dump-script. There is, deliberately, no --lt-help.
+#
+# The first argument to this parsing function should be the
+# script's ../libtool value, followed by no.
+lt_option_debug=
+func_parse_lt_options ()
+{
+  lt_script_arg0=$0
+  shift
+  for lt_opt
+  do
+    case "$lt_opt" in
+    --lt-debug) lt_option_debug=1 ;;
+    --lt-dump-script)
+        lt_dump_D=`$ECHO "X$lt_script_arg0" | /bin/sed -e 's/^X//' -e 's%/[^/]*$%%'`
+        test "X$lt_dump_D" = "X$lt_script_arg0" && lt_dump_D=.
+        lt_dump_F=`$ECHO "X$lt_script_arg0" | /bin/sed -e 's/^X//' -e 's%^.*/%%'`
+        cat "$lt_dump_D/$lt_dump_F"
+        exit 0
+      ;;
+    --lt-*)
+        $ECHO "Unrecognized --lt- option: '$lt_opt'" 1>&2
+        exit 1
+      ;;
+    esac
+  done
+
+  # Print the debug banner immediately:
+  if test -n "$lt_option_debug"; then
+    echo "unit-test-client:unit-test-client:${LINENO}: libtool wrapper (GNU libtool) 2.4 Debian-2.4-3" 1>&2
+  fi
+}
+
+# Used when --lt-debug. Prints its arguments to stdout
+# (redirection is the responsibility of the caller)
+func_lt_dump_args ()
+{
+  lt_dump_args_N=1;
+  for lt_arg
+  do
+    $ECHO "unit-test-client:unit-test-client:${LINENO}: newargv[$lt_dump_args_N]: $lt_arg"
+    lt_dump_args_N=`expr $lt_dump_args_N + 1`
+  done
+}
+
+# Core function for launching the target application
+func_exec_program_core ()
+{
+
+      if test -n "$lt_option_debug"; then
+        $ECHO "unit-test-client:unit-test-client:${LINENO}: newargv[0]: $progdir/$program" 1>&2
+        func_lt_dump_args ${1+"$@"} 1>&2
+      fi
+      exec "$progdir/$program" ${1+"$@"}
+
+      $ECHO "$0: cannot exec $program $*" 1>&2
+      exit 1
+}
+
+# A function to encapsulate launching the target application
+# Strips options in the --lt-* namespace from $@ and
+# launches target application with the remaining arguments.
+func_exec_program ()
+{
+  for lt_wr_arg
+  do
+    case $lt_wr_arg in
+    --lt-*) ;;
+    *) set x "$@" "$lt_wr_arg"; shift;;
+    esac
+    shift
+  done
+  func_exec_program_core ${1+"$@"}
+}
+
+  # Parse options
+  func_parse_lt_options "$0" ${1+"$@"}
+
+  # Find the directory that this script lives in.
+  thisdir=`$ECHO "$file" | /bin/sed 's%/[^/]*$%%'`
+  test "x$thisdir" = "x$file" && thisdir=.
+
+  # Follow symbolic links until we get to the real thisdir.
+  file=`ls -ld "$file" | /bin/sed -n 's/.*-> //p'`
+  while test -n "$file"; do
+    destdir=`$ECHO "$file" | /bin/sed 's%/[^/]*$%%'`
+
+    # If there was a directory component, then change thisdir.
+    if test "x$destdir" != "x$file"; then
+      case "$destdir" in
+      [\\/]* | [A-Za-z]:[\\/]*) thisdir="$destdir" ;;
+      *) thisdir="$thisdir/$destdir" ;;
+      esac
+    fi
+
+    file=`$ECHO "$file" | /bin/sed 's%^.*/%%'`
+    file=`ls -ld "$thisdir/$file" | /bin/sed -n 's/.*-> //p'`
+  done
+
+  # Usually 'no', except on cygwin/mingw when embedded into
+  # the cwrapper.
+  WRAPPER_SCRIPT_BELONGS_IN_OBJDIR=no
+  if test "$WRAPPER_SCRIPT_BELONGS_IN_OBJDIR" = "yes"; then
+    # special case for '.'
+    if test "$thisdir" = "."; then
+      thisdir=`pwd`
+    fi
+    # remove .libs from thisdir
+    case "$thisdir" in
+    *[\\/].libs ) thisdir=`$ECHO "$thisdir" | /bin/sed 's%[\\/][^\\/]*$%%'` ;;
+    .libs )   thisdir=. ;;
+    esac
+  fi
+
+  # Try to get the absolute directory name.
+  absdir=`cd "$thisdir" && pwd`
+  test -n "$absdir" && thisdir="$absdir"
+
+  program=lt-'unit-test-client'
+  progdir="$thisdir/.libs"
+
+  if test ! -f "$progdir/$program" ||
+     { file=`ls -1dt "$progdir/$program" "$progdir/../$program" 2>/dev/null | /bin/sed 1q`; \
+       test "X$file" != "X$progdir/$program"; }; then
+
+    file="$$-$program"
+
+    if test ! -d "$progdir"; then
+      mkdir "$progdir"
+    else
+      rm -f "$progdir/$file"
+    fi
+
+    # relink executable if necessary
+    if test -n "$relink_command"; then
+      if relink_command_output=`eval $relink_command 2>&1`; then :
+      else
+	printf %s\n "$relink_command_output" >&2
+	rm -f "$progdir/$file"
+	exit 1
+      fi
+    fi
+
+    mv -f "$progdir/$file" "$progdir/$program" 2>/dev/null ||
+    { rm -f "$progdir/$program";
+      mv -f "$progdir/$file" "$progdir/$program"; }
+    rm -f "$progdir/$file"
+  fi
+
+  if test -f "$progdir/$program"; then
+    if test "$libtool_execute_magic" != "%%%MAGIC variable%%%"; then
+      # Run the actual program with our arguments.
+      func_exec_program ${1+"$@"}
+    fi
+  else
+    # The program doesn't exist.
+    $ECHO "$0: error: \`$progdir/$program' does not exist" 1>&2
+    $ECHO "This script is just a wrapper for $program." 1>&2
+    $ECHO "See the libtool documentation for more information." 1>&2
+    exit 1
+  fi
+fi
diff --git a/tests/unit-test-client.c b/tests/unit-test-client.c
new file mode 100644
index 0000000..533e6a7
--- /dev/null
+++ b/tests/unit-test-client.c
@@ -0,0 +1,690 @@
+/*
+ * Copyright © 2008-2010 Stéphane Raimbault <stephane.raimbault@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU 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 General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <modbus.h>
+
+#include "unit-test.h"
+
+enum {
+    TCP,
+    TCP_PI,
+    RTU
+};
+
+int main(int argc, char *argv[])
+{
+    uint8_t *tab_rp_bits;
+    uint16_t *tab_rp_registers;
+    uint16_t *tab_rp_registers_bad;
+    modbus_t *ctx;
+    int i;
+    uint8_t value;
+    int nb_points;
+    int rc;
+    float real;
+    struct timeval old_response_timeout;
+    struct timeval response_timeout;
+    int use_backend;
+
+    if (argc > 1) {
+        if (strcmp(argv[1], "tcp") == 0) {
+            use_backend = TCP;
+	} else if (strcmp(argv[1], "tcppi") == 0) {
+            use_backend = TCP_PI;
+        } else if (strcmp(argv[1], "rtu") == 0) {
+            use_backend = RTU;
+        } else {
+            printf("Usage:\n  %s [tcp|tcppi|rtu] - Modbus client for unit testing\n\n", argv[0]);
+            exit(1);
+        }
+    } else {
+        /* By default */
+        use_backend = TCP;
+    }
+
+    if (use_backend == TCP) {
+        ctx = modbus_new_tcp("127.0.0.1", 1502);
+    } else if (use_backend == TCP_PI) {
+        ctx = modbus_new_tcp_pi("::1", "1502");
+    } else {
+        ctx = modbus_new_rtu("/dev/ttyUSB1", 115200, 'N', 8, 1);
+    }
+    if (ctx == NULL) {
+        fprintf(stderr, "Unable to allocate libmodbus context\n");
+        return -1;
+    }
+    modbus_set_debug(ctx, TRUE);
+    modbus_set_error_recovery(ctx,
+                              MODBUS_ERROR_RECOVERY_LINK |
+                              MODBUS_ERROR_RECOVERY_PROTOCOL);
+
+    if (use_backend == RTU) {
+          modbus_set_slave(ctx, SERVER_ID);
+    }
+
+    if (modbus_connect(ctx) == -1) {
+        fprintf(stderr, "Connection failed: %s\n",
+                modbus_strerror(errno));
+        modbus_free(ctx);
+        return -1;
+    }
+
+    /* Allocate and initialize the memory to store the bits */
+    nb_points = (UT_BITS_NB > UT_INPUT_BITS_NB) ? UT_BITS_NB : UT_INPUT_BITS_NB;
+    tab_rp_bits = (uint8_t *) malloc(nb_points * sizeof(uint8_t));
+    memset(tab_rp_bits, 0, nb_points * sizeof(uint8_t));
+
+    /* Allocate and initialize the memory to store the registers */
+    nb_points = (UT_REGISTERS_NB > UT_INPUT_REGISTERS_NB) ?
+        UT_REGISTERS_NB : UT_INPUT_REGISTERS_NB;
+    tab_rp_registers = (uint16_t *) malloc(nb_points * sizeof(uint16_t));
+    memset(tab_rp_registers, 0, nb_points * sizeof(uint16_t));
+
+    printf("** UNIT TESTING **\n");
+
+    printf("\nTEST WRITE/READ:\n");
+
+    /** COIL BITS **/
+
+    /* Single */
+    rc = modbus_write_bit(ctx, UT_BITS_ADDRESS, ON);
+    printf("1/2 modbus_write_bit: ");
+    if (rc == 1) {
+        printf("OK\n");
+    } else {
+        printf("FAILED\n");
+        goto close;
+    }
+
+    rc = modbus_read_bits(ctx, UT_BITS_ADDRESS, 1, tab_rp_bits);
+    printf("2/2 modbus_read_bits: ");
+    if (rc != 1) {
+        printf("FAILED (nb points %d)\n", rc);
+        goto close;
+    }
+
+    if (tab_rp_bits[0] != ON) {
+        printf("FAILED (%0X = != %0X)\n", tab_rp_bits[0], ON);
+        goto close;
+    }
+    printf("OK\n");
+    /* End single */
+
+    /* Multiple bits */
+    {
+        uint8_t tab_value[UT_BITS_NB];
+
+        modbus_set_bits_from_bytes(tab_value, 0, UT_BITS_NB, UT_BITS_TAB);
+        rc = modbus_write_bits(ctx, UT_BITS_ADDRESS,
+                               UT_BITS_NB, tab_value);
+        printf("1/2 modbus_write_bits: ");
+        if (rc == UT_BITS_NB) {
+            printf("OK\n");
+        } else {
+            printf("FAILED\n");
+            goto close;
+        }
+    }
+
+    rc = modbus_read_bits(ctx, UT_BITS_ADDRESS, UT_BITS_NB, tab_rp_bits);
+    printf("2/2 modbus_read_bits: ");
+    if (rc != UT_BITS_NB) {
+        printf("FAILED (nb points %d)\n", rc);
+        goto close;
+    }
+
+    i = 0;
+    nb_points = UT_BITS_NB;
+    while (nb_points > 0) {
+        int nb_bits = (nb_points > 8) ? 8 : nb_points;
+
+        value = modbus_get_byte_from_bits(tab_rp_bits, i*8, nb_bits);
+        if (value != UT_BITS_TAB[i]) {
+            printf("FAILED (%0X != %0X)\n", value, UT_BITS_TAB[i]);
+            goto close;
+        }
+
+        nb_points -= nb_bits;
+        i++;
+    }
+    printf("OK\n");
+    /* End of multiple bits */
+
+    /** DISCRETE INPUTS **/
+    rc = modbus_read_input_bits(ctx, UT_INPUT_BITS_ADDRESS,
+                                UT_INPUT_BITS_NB, tab_rp_bits);
+    printf("1/1 modbus_read_input_bits: ");
+
+    if (rc != UT_INPUT_BITS_NB) {
+        printf("FAILED (nb points %d)\n", rc);
+        goto close;
+    }
+
+    i = 0;
+    nb_points = UT_INPUT_BITS_NB;
+    while (nb_points > 0) {
+        int nb_bits = (nb_points > 8) ? 8 : nb_points;
+
+        value = modbus_get_byte_from_bits(tab_rp_bits, i*8, nb_bits);
+        if (value != UT_INPUT_BITS_TAB[i]) {
+            printf("FAILED (%0X != %0X)\n", value, UT_INPUT_BITS_TAB[i]);
+            goto close;
+        }
+
+        nb_points -= nb_bits;
+        i++;
+    }
+    printf("OK\n");
+
+    /** HOLDING REGISTERS **/
+
+    /* Single register */
+    rc = modbus_write_register(ctx, UT_REGISTERS_ADDRESS, 0x1234);
+    printf("1/2 modbus_write_register: ");
+    if (rc == 1) {
+        printf("OK\n");
+    } else {
+        printf("FAILED\n");
+        goto close;
+    }
+
+    rc = modbus_read_registers(ctx, UT_REGISTERS_ADDRESS,
+                               1, tab_rp_registers);
+    printf("2/2 modbus_read_registers: ");
+    if (rc != 1) {
+        printf("FAILED (nb points %d)\n", rc);
+        goto close;
+    }
+
+    if (tab_rp_registers[0] != 0x1234) {
+        printf("FAILED (%0X != %0X)\n",
+               tab_rp_registers[0], 0x1234);
+        goto close;
+    }
+    printf("OK\n");
+    /* End of single register */
+
+    /* Many registers */
+    rc = modbus_write_registers(ctx, UT_REGISTERS_ADDRESS,
+                                UT_REGISTERS_NB, UT_REGISTERS_TAB);
+    printf("1/5 modbus_write_registers: ");
+    if (rc == UT_REGISTERS_NB) {
+        printf("OK\n");
+    } else {
+        printf("FAILED\n");
+        goto close;
+    }
+
+    rc = modbus_read_registers(ctx, UT_REGISTERS_ADDRESS,
+                               UT_REGISTERS_NB, tab_rp_registers);
+    printf("2/5 modbus_read_registers: ");
+    if (rc != UT_REGISTERS_NB) {
+        printf("FAILED (nb points %d)\n", rc);
+        goto close;
+    }
+
+    for (i=0; i < UT_REGISTERS_NB; i++) {
+        if (tab_rp_registers[i] != UT_REGISTERS_TAB[i]) {
+            printf("FAILED (%0X != %0X)\n",
+                   tab_rp_registers[i],
+                   UT_REGISTERS_TAB[i]);
+            goto close;
+        }
+    }
+    printf("OK\n");
+
+    rc = modbus_read_registers(ctx, UT_REGISTERS_ADDRESS,
+                               0, tab_rp_registers);
+    printf("3/5 modbus_read_registers (0): ");
+    if (rc != 0) {
+        printf("FAILED (nb points %d)\n", rc);
+        goto close;
+    }
+    printf("OK\n");
+
+    nb_points = (UT_REGISTERS_NB >
+                 UT_INPUT_REGISTERS_NB) ?
+        UT_REGISTERS_NB : UT_INPUT_REGISTERS_NB;
+    memset(tab_rp_registers, 0, nb_points * sizeof(uint16_t));
+
+    /* Write registers to zero from tab_rp_registers and store read registers
+       into tab_rp_registers. So the read registers must set to 0, except the
+       first one because there is an offset of 1 register on write. */
+    rc = modbus_write_and_read_registers(ctx,
+                                         UT_REGISTERS_ADDRESS + 1, UT_REGISTERS_NB - 1,
+                                         tab_rp_registers,
+                                         UT_REGISTERS_ADDRESS,
+                                         UT_REGISTERS_NB,
+                                         tab_rp_registers);
+    printf("4/5 modbus_write_and_read_registers: ");
+    if (rc != UT_REGISTERS_NB) {
+        printf("FAILED (nb points %d != %d)\n", rc, UT_REGISTERS_NB);
+        goto close;
+    }
+
+    if (tab_rp_registers[0] != UT_REGISTERS_TAB[0]) {
+        printf("FAILED (%0X != %0X)\n",
+               tab_rp_registers[0], UT_REGISTERS_TAB[0]);
+    }
+
+    for (i=1; i < UT_REGISTERS_NB; i++) {
+        if (tab_rp_registers[i] != 0) {
+            printf("FAILED (%0X != %0X)\n",
+                   tab_rp_registers[i], 0);
+            goto close;
+        }
+    }
+    printf("OK\n");
+
+    /* End of many registers */
+
+
+    /** INPUT REGISTERS **/
+    rc = modbus_read_input_registers(ctx, UT_INPUT_REGISTERS_ADDRESS,
+                                     UT_INPUT_REGISTERS_NB,
+                                     tab_rp_registers);
+    printf("1/1 modbus_read_input_registers: ");
+    if (rc != UT_INPUT_REGISTERS_NB) {
+        printf("FAILED (nb points %d)\n", rc);
+        goto close;
+    }
+
+    for (i=0; i < UT_INPUT_REGISTERS_NB; i++) {
+        if (tab_rp_registers[i] != UT_INPUT_REGISTERS_TAB[i]) {
+            printf("FAILED (%0X != %0X)\n",
+                   tab_rp_registers[i], UT_INPUT_REGISTERS_TAB[i]);
+            goto close;
+        }
+    }
+    printf("OK\n");
+
+    printf("\nTEST FLOATS\n");
+    /** FLOAT **/
+    printf("1/2 Set float: ");
+    modbus_set_float(UT_REAL, tab_rp_registers);
+    if (tab_rp_registers[1] == (UT_IREAL >> 16) &&
+        tab_rp_registers[0] == (UT_IREAL & 0xFFFF)) {
+        printf("OK\n");
+    } else {
+        printf("FAILED (%x != %x)\n",
+               *((uint32_t *)tab_rp_registers), UT_IREAL);
+        goto close;
+    }
+
+    printf("2/2 Get float: ");
+    real = modbus_get_float(tab_rp_registers);
+    if (real == UT_REAL) {
+        printf("OK\n");
+    } else {
+        printf("FAILED (%f != %f)\n", real, UT_REAL);
+        goto close;
+    }
+
+    printf("\nAt this point, error messages doesn't mean the test has failed\n");
+
+    /** ILLEGAL DATA ADDRESS **/
+    printf("\nTEST ILLEGAL DATA ADDRESS:\n");
+
+    /* The mapping begins at 0 and ends at address + nb_points so
+     * the addresses are not valid. */
+
+    rc = modbus_read_bits(ctx, UT_BITS_ADDRESS,
+                          UT_BITS_NB + 1, tab_rp_bits);
+    printf("* modbus_read_bits: ");
+    if (rc == -1 && errno == EMBXILADD) {
+        printf("OK\n");
+    } else {
+        printf("FAILED\n");
+        goto close;
+    }
+
+    rc = modbus_read_input_bits(ctx, UT_INPUT_BITS_ADDRESS,
+                                UT_INPUT_BITS_NB + 1, tab_rp_bits);
+    printf("* modbus_read_input_bits: ");
+    if (rc == -1 && errno == EMBXILADD)
+        printf("OK\n");
+    else {
+        printf("FAILED\n");
+        goto close;
+    }
+
+    rc = modbus_read_registers(ctx, UT_REGISTERS_ADDRESS,
+                               UT_REGISTERS_NB + 1, tab_rp_registers);
+    printf("* modbus_read_registers: ");
+    if (rc == -1 && errno == EMBXILADD)
+        printf("OK\n");
+    else {
+        printf("FAILED\n");
+        goto close;
+    }
+
+    rc = modbus_read_input_registers(ctx, UT_INPUT_REGISTERS_ADDRESS,
+                                     UT_INPUT_REGISTERS_NB + 1,
+                                     tab_rp_registers);
+    printf("* modbus_read_input_registers: ");
+    if (rc == -1 && errno == EMBXILADD)
+        printf("OK\n");
+    else {
+        printf("FAILED\n");
+        goto close;
+    }
+
+    rc = modbus_write_bit(ctx, UT_BITS_ADDRESS + UT_BITS_NB, ON);
+    printf("* modbus_write_bit: ");
+    if (rc == -1 && errno == EMBXILADD) {
+        printf("OK\n");
+    } else {
+        printf("FAILED\n");
+        goto close;
+    }
+
+    rc = modbus_write_bits(ctx, UT_BITS_ADDRESS + UT_BITS_NB,
+                           UT_BITS_NB, tab_rp_bits);
+    printf("* modbus_write_coils: ");
+    if (rc == -1 && errno == EMBXILADD) {
+        printf("OK\n");
+    } else {
+        printf("FAILED\n");
+        goto close;
+    }
+
+    rc = modbus_write_registers(ctx, UT_REGISTERS_ADDRESS + UT_REGISTERS_NB,
+                                UT_REGISTERS_NB, tab_rp_registers);
+    printf("* modbus_write_registers: ");
+    if (rc == -1 && errno == EMBXILADD) {
+        printf("OK\n");
+    } else {
+        printf("FAILED\n");
+        goto close;
+    }
+
+
+    /** TOO MANY DATA **/
+    printf("\nTEST TOO MANY DATA ERROR:\n");
+
+    rc = modbus_read_bits(ctx, UT_BITS_ADDRESS,
+                          MODBUS_MAX_READ_BITS + 1, tab_rp_bits);
+    printf("* modbus_read_bits: ");
+    if (rc == -1 && errno == EMBMDATA) {
+        printf("OK\n");
+    } else {
+        printf("FAILED\n");
+        goto close;
+    }
+
+    rc = modbus_read_input_bits(ctx, UT_INPUT_BITS_ADDRESS,
+                                MODBUS_MAX_READ_BITS + 1, tab_rp_bits);
+    printf("* modbus_read_input_bits: ");
+    if (rc == -1 && errno == EMBMDATA) {
+        printf("OK\n");
+    } else {
+        printf("FAILED\n");
+        goto close;
+    }
+
+    rc = modbus_read_registers(ctx, UT_REGISTERS_ADDRESS,
+                               MODBUS_MAX_READ_REGISTERS + 1,
+                               tab_rp_registers);
+    printf("* modbus_read_registers: ");
+    if (rc == -1 && errno == EMBMDATA) {
+        printf("OK\n");
+    } else {
+        printf("FAILED\n");
+        goto close;
+    }
+
+    rc = modbus_read_input_registers(ctx, UT_INPUT_REGISTERS_ADDRESS,
+                                     MODBUS_MAX_READ_REGISTERS + 1,
+                                     tab_rp_registers);
+    printf("* modbus_read_input_registers: ");
+    if (rc == -1 && errno == EMBMDATA) {
+        printf("OK\n");
+    } else {
+        printf("FAILED\n");
+        goto close;
+    }
+
+    rc = modbus_write_bits(ctx, UT_BITS_ADDRESS,
+                           MODBUS_MAX_WRITE_BITS + 1, tab_rp_bits);
+    printf("* modbus_write_bits: ");
+    if (rc == -1 && errno == EMBMDATA) {
+        printf("OK\n");
+    } else {
+        goto close;
+        printf("FAILED\n");
+    }
+
+    rc = modbus_write_registers(ctx, UT_REGISTERS_ADDRESS,
+                                MODBUS_MAX_WRITE_REGISTERS + 1,
+                                tab_rp_registers);
+    printf("* modbus_write_registers: ");
+    if (rc == -1 && errno == EMBMDATA) {
+        printf("OK\n");
+    } else {
+        printf("FAILED\n");
+        goto close;
+    }
+
+    /** SLAVE REPLY **/
+    printf("\nTEST SLAVE REPLY:\n");
+    modbus_set_slave(ctx, INVALID_SERVER_ID);
+    rc = modbus_read_registers(ctx, UT_REGISTERS_ADDRESS,
+                               UT_REGISTERS_NB, tab_rp_registers);
+    if (use_backend == RTU) {
+        const int RAW_REQ_LENGTH = 6;
+        uint8_t raw_req[] = { INVALID_SERVER_ID, 0x03, 0x00, 0x01, 0xFF, 0xFF };
+        uint8_t rsp[MODBUS_TCP_MAX_ADU_LENGTH];
+
+        /* No response in RTU mode */
+        printf("1/4-A No response from slave %d: ", INVALID_SERVER_ID);
+
+        if (rc == -1 && errno == ETIMEDOUT) {
+            printf("OK\n");
+        } else {
+            printf("FAILED\n");
+            goto close;
+        }
+
+        /* Send an invalid query with a wrong slave ID */
+        modbus_send_raw_request(ctx, raw_req,
+                                RAW_REQ_LENGTH * sizeof(uint8_t));
+        rc = modbus_receive_confirmation(ctx, rsp);
+
+        printf("1/4-B No response from slave %d with invalid request: ",
+               INVALID_SERVER_ID);
+
+        if (rc == -1 && errno == ETIMEDOUT) {
+            printf("OK\n");
+        } else {
+            printf("FAILED (%d)\n", rc);
+            goto close;
+        }
+
+    } else {
+        /* Response in TCP mode */
+        printf("1/4 Response from slave %d: ", 18);
+
+        if (rc == UT_REGISTERS_NB) {
+            printf("OK\n");
+        } else {
+            printf("FAILED\n");
+            goto close;
+        }
+    }
+
+    rc = modbus_set_slave(ctx, MODBUS_BROADCAST_ADDRESS);
+    if (rc == -1) {
+        printf("Invalid broacast address\n");
+        goto close;
+    }
+
+    rc = modbus_read_registers(ctx, UT_REGISTERS_ADDRESS,
+                               UT_REGISTERS_NB, tab_rp_registers);
+    printf("2/4 Reply after a broadcast query: ");
+    if (rc == UT_REGISTERS_NB) {
+        printf("OK\n");
+    } else {
+        printf("FAILED\n");
+        goto close;
+    }
+
+    /* Restore slave */
+    if (use_backend == RTU) {
+        modbus_set_slave(ctx, SERVER_ID);
+    } else {
+        modbus_set_slave(ctx, MODBUS_TCP_SLAVE);
+    }
+
+    printf("3/4 Report slave ID: \n");
+    /* tab_rp_bits is used to store bytes */
+    rc = modbus_report_slave_id(ctx, tab_rp_bits);
+    if (rc == -1) {
+        printf("FAILED\n");
+        goto close;
+    }
+
+    /* Slave ID is an arbitraty number for libmodbus */
+    if (rc > 0) {
+        printf("OK Slave ID is %d\n", tab_rp_bits[0]);
+    } else {
+        printf("FAILED\n");
+        goto close;
+    }
+
+    /* Run status indicator */
+    if (rc > 1 && tab_rp_bits[1] == 0xFF) {
+        printf("OK Run Status Indicator is %s\n", tab_rp_bits[1] ? "ON" : "OFF");
+    } else {
+        printf("FAILED\n");
+        goto close;
+    }
+
+    /* Print additional data as string */
+    if (rc > 2) {
+        printf("Additional data: ");
+        for (i=2; i < rc; i++) {
+            printf("%c", tab_rp_bits[i]);
+        }
+        printf("\n");
+    }
+
+    /* Save original timeout */
+    modbus_get_response_timeout(ctx, &old_response_timeout);
+
+    /* Define a new and too short timeout */
+    response_timeout.tv_sec = 0;
+    response_timeout.tv_usec = 0;
+    modbus_set_response_timeout(ctx, &response_timeout);
+
+    rc = modbus_read_registers(ctx, UT_REGISTERS_ADDRESS,
+                               UT_REGISTERS_NB, tab_rp_registers);
+    printf("4/4 Too short timeout: ");
+    if (rc == -1 && errno == ETIMEDOUT) {
+        printf("OK\n");
+    } else {
+        printf("FAILED (can fail on slow systems or Windows)\n");
+    }
+
+    /* Restore original timeout */
+    modbus_set_response_timeout(ctx, &old_response_timeout);
+
+    /* A wait and flush operation is done by the error recovery code of
+     * libmodbus */
+
+    /** BAD RESPONSE **/
+    printf("\nTEST BAD RESPONSE ERROR:\n");
+
+    /* Allocate only the required space */
+    tab_rp_registers_bad = (uint16_t *) malloc(
+        UT_REGISTERS_NB_SPECIAL * sizeof(uint16_t));
+    rc = modbus_read_registers(ctx, UT_REGISTERS_ADDRESS,
+                               UT_REGISTERS_NB_SPECIAL, tab_rp_registers_bad);
+    printf("* modbus_read_registers: ");
+    if (rc == -1 && errno == EMBBADDATA) {
+        printf("OK\n");
+    } else {
+        printf("FAILED\n");
+        goto close;
+    }
+
+    free(tab_rp_registers_bad);
+
+    /** MANUAL EXCEPTION **/
+    printf("\nTEST MANUAL EXCEPTION:\n");
+
+    rc = modbus_read_registers(ctx, UT_REGISTERS_ADDRESS_SPECIAL,
+                               UT_REGISTERS_NB, tab_rp_registers);
+    printf("* modbus_read_registers at special address: ");
+    if (rc == -1 && errno == EMBXSBUSY) {
+        printf("OK\n");
+    } else {
+        printf("FAILED\n");
+        goto close;
+    }
+
+    /** RAW REQUEST */
+    printf("\nTEST RAW REQUEST:\n");
+    {
+        const int RAW_REQ_LENGTH = 6;
+        uint8_t raw_req[] = { (use_backend == RTU) ? SERVER_ID : 0xFF,
+                              0x03, 0x00, 0x01, 0x0, 0x05 };
+        int req_length;
+        uint8_t rsp[MODBUS_TCP_MAX_ADU_LENGTH];
+
+        req_length = modbus_send_raw_request(ctx, raw_req,
+                                             RAW_REQ_LENGTH * sizeof(uint8_t));
+
+        printf("* modbus_send_raw_request: ");
+        if ((use_backend == RTU && req_length == (RAW_REQ_LENGTH + 2)) ||
+            ((use_backend == TCP || use_backend == TCP_PI) &&
+             req_length == (RAW_REQ_LENGTH + 6))) {
+            printf("OK\n");
+        } else {
+            printf("FAILED (%d)\n", req_length);
+            goto close;
+        }
+
+        printf("* modbus_receive_confirmation: ");
+        rc  = modbus_receive_confirmation(ctx, rsp);
+        if ((use_backend == RTU && rc == 15) ||
+            ((use_backend == TCP || use_backend == TCP_PI) &&
+             rc == 19)) {
+            printf("OK\n");
+        } else {
+            printf("FAILED (%d)\n", rc);
+            goto close;
+        }
+    }
+
+    printf("\nALL TESTS PASS WITH SUCCESS.\n");
+
+close:
+    /* Free the memory */
+    free(tab_rp_bits);
+    free(tab_rp_registers);
+
+    /* Close the connection */
+    modbus_close(ctx);
+    modbus_free(ctx);
+
+    return 0;
+}
diff --git a/tests/unit-test-client.o b/tests/unit-test-client.o
new file mode 100644
index 0000000..8358604
--- /dev/null
+++ b/tests/unit-test-client.o
diff --git a/tests/unit-test-server b/tests/unit-test-server
new file mode 100755
index 0000000..a8d1c0e
--- /dev/null
+++ b/tests/unit-test-server
@@ -0,0 +1,225 @@
+#! /bin/bash
+
+# unit-test-server - temporary wrapper script for .libs/unit-test-server
+# Generated by libtool (GNU libtool) 2.4 Debian-2.4-3
+#
+# The unit-test-server program cannot be directly executed until all the libtool
+# libraries that it depends on are installed.
+#
+# This wrapper script should never be moved out of the build directory.
+# If it is, it will not operate correctly.
+
+# Sed substitution that helps us do robust quoting.  It backslashifies
+# metacharacters that are still active within double-quoted strings.
+sed_quote_subst='s/\([`"$\\]\)/\\\1/g'
+
+# Be Bourne compatible
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
+  emulate sh
+  NULLCMD=:
+  # Zsh 3.x and 4.x performs word splitting on ${1+"$@"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '${1+"$@"}'='"$@"'
+  setopt NO_GLOB_SUBST
+else
+  case `(set -o) 2>/dev/null` in *posix*) set -o posix;; esac
+fi
+BIN_SH=xpg4; export BIN_SH # for Tru64
+DUALCASE=1; export DUALCASE # for MKS sh
+
+# The HP-UX ksh and POSIX shell print the target directory to stdout
+# if CDPATH is set.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+relink_command="(cd /home/jmccrohan/bin/libmodbus/tests; { test -z \"\${LIBRARY_PATH+set}\" || unset LIBRARY_PATH || { LIBRARY_PATH=; export LIBRARY_PATH; }; }; { test -z \"\${COMPILER_PATH+set}\" || unset COMPILER_PATH || { COMPILER_PATH=; export COMPILER_PATH; }; }; { test -z \"\${GCC_EXEC_PREFIX+set}\" || unset GCC_EXEC_PREFIX || { GCC_EXEC_PREFIX=; export GCC_EXEC_PREFIX; }; }; { test -z \"\${LD_RUN_PATH+set}\" || unset LD_RUN_PATH || { LD_RUN_PATH=; export LD_RUN_PATH; }; }; { test -z \"\${LD_LIBRARY_PATH+set}\" || unset LD_LIBRARY_PATH || { LD_LIBRARY_PATH=; export LD_LIBRARY_PATH; }; }; PATH=/usr/sbin:/usr/bin:/sbin:/bin:/usr/bin/X11; export PATH; gcc -g -O2 -g -O2 -Wall -Werror -o \$progdir/\$file unit-test-server.o  ../src/.libs/libmodbus.so -Wl,-rpath -Wl,/home/jmccrohan/bin/libmodbus/src/.libs)"
+
+# This environment variable determines our operation mode.
+if test "$libtool_install_magic" = "%%%MAGIC variable%%%"; then
+  # install mode needs the following variables:
+  generated_by_libtool_version='2.4'
+  notinst_deplibs=' ../src/libmodbus.la'
+else
+  # When we are sourced in execute mode, $file and $ECHO are already set.
+  if test "$libtool_execute_magic" != "%%%MAGIC variable%%%"; then
+    file="$0"
+
+# A function that is used when there is no print builtin or printf.
+func_fallback_echo ()
+{
+  eval 'cat <<_LTECHO_EOF
+$1
+_LTECHO_EOF'
+}
+    ECHO="printf %s\\n"
+  fi
+
+# Very basic option parsing. These options are (a) specific to
+# the libtool wrapper, (b) are identical between the wrapper
+# /script/ and the wrapper /executable/ which is used only on
+# windows platforms, and (c) all begin with the string --lt-
+# (application programs are unlikely to have options which match
+# this pattern).
+#
+# There are only two supported options: --lt-debug and
+# --lt-dump-script. There is, deliberately, no --lt-help.
+#
+# The first argument to this parsing function should be the
+# script's ../libtool value, followed by no.
+lt_option_debug=
+func_parse_lt_options ()
+{
+  lt_script_arg0=$0
+  shift
+  for lt_opt
+  do
+    case "$lt_opt" in
+    --lt-debug) lt_option_debug=1 ;;
+    --lt-dump-script)
+        lt_dump_D=`$ECHO "X$lt_script_arg0" | /bin/sed -e 's/^X//' -e 's%/[^/]*$%%'`
+        test "X$lt_dump_D" = "X$lt_script_arg0" && lt_dump_D=.
+        lt_dump_F=`$ECHO "X$lt_script_arg0" | /bin/sed -e 's/^X//' -e 's%^.*/%%'`
+        cat "$lt_dump_D/$lt_dump_F"
+        exit 0
+      ;;
+    --lt-*)
+        $ECHO "Unrecognized --lt- option: '$lt_opt'" 1>&2
+        exit 1
+      ;;
+    esac
+  done
+
+  # Print the debug banner immediately:
+  if test -n "$lt_option_debug"; then
+    echo "unit-test-server:unit-test-server:${LINENO}: libtool wrapper (GNU libtool) 2.4 Debian-2.4-3" 1>&2
+  fi
+}
+
+# Used when --lt-debug. Prints its arguments to stdout
+# (redirection is the responsibility of the caller)
+func_lt_dump_args ()
+{
+  lt_dump_args_N=1;
+  for lt_arg
+  do
+    $ECHO "unit-test-server:unit-test-server:${LINENO}: newargv[$lt_dump_args_N]: $lt_arg"
+    lt_dump_args_N=`expr $lt_dump_args_N + 1`
+  done
+}
+
+# Core function for launching the target application
+func_exec_program_core ()
+{
+
+      if test -n "$lt_option_debug"; then
+        $ECHO "unit-test-server:unit-test-server:${LINENO}: newargv[0]: $progdir/$program" 1>&2
+        func_lt_dump_args ${1+"$@"} 1>&2
+      fi
+      exec "$progdir/$program" ${1+"$@"}
+
+      $ECHO "$0: cannot exec $program $*" 1>&2
+      exit 1
+}
+
+# A function to encapsulate launching the target application
+# Strips options in the --lt-* namespace from $@ and
+# launches target application with the remaining arguments.
+func_exec_program ()
+{
+  for lt_wr_arg
+  do
+    case $lt_wr_arg in
+    --lt-*) ;;
+    *) set x "$@" "$lt_wr_arg"; shift;;
+    esac
+    shift
+  done
+  func_exec_program_core ${1+"$@"}
+}
+
+  # Parse options
+  func_parse_lt_options "$0" ${1+"$@"}
+
+  # Find the directory that this script lives in.
+  thisdir=`$ECHO "$file" | /bin/sed 's%/[^/]*$%%'`
+  test "x$thisdir" = "x$file" && thisdir=.
+
+  # Follow symbolic links until we get to the real thisdir.
+  file=`ls -ld "$file" | /bin/sed -n 's/.*-> //p'`
+  while test -n "$file"; do
+    destdir=`$ECHO "$file" | /bin/sed 's%/[^/]*$%%'`
+
+    # If there was a directory component, then change thisdir.
+    if test "x$destdir" != "x$file"; then
+      case "$destdir" in
+      [\\/]* | [A-Za-z]:[\\/]*) thisdir="$destdir" ;;
+      *) thisdir="$thisdir/$destdir" ;;
+      esac
+    fi
+
+    file=`$ECHO "$file" | /bin/sed 's%^.*/%%'`
+    file=`ls -ld "$thisdir/$file" | /bin/sed -n 's/.*-> //p'`
+  done
+
+  # Usually 'no', except on cygwin/mingw when embedded into
+  # the cwrapper.
+  WRAPPER_SCRIPT_BELONGS_IN_OBJDIR=no
+  if test "$WRAPPER_SCRIPT_BELONGS_IN_OBJDIR" = "yes"; then
+    # special case for '.'
+    if test "$thisdir" = "."; then
+      thisdir=`pwd`
+    fi
+    # remove .libs from thisdir
+    case "$thisdir" in
+    *[\\/].libs ) thisdir=`$ECHO "$thisdir" | /bin/sed 's%[\\/][^\\/]*$%%'` ;;
+    .libs )   thisdir=. ;;
+    esac
+  fi
+
+  # Try to get the absolute directory name.
+  absdir=`cd "$thisdir" && pwd`
+  test -n "$absdir" && thisdir="$absdir"
+
+  program=lt-'unit-test-server'
+  progdir="$thisdir/.libs"
+
+  if test ! -f "$progdir/$program" ||
+     { file=`ls -1dt "$progdir/$program" "$progdir/../$program" 2>/dev/null | /bin/sed 1q`; \
+       test "X$file" != "X$progdir/$program"; }; then
+
+    file="$$-$program"
+
+    if test ! -d "$progdir"; then
+      mkdir "$progdir"
+    else
+      rm -f "$progdir/$file"
+    fi
+
+    # relink executable if necessary
+    if test -n "$relink_command"; then
+      if relink_command_output=`eval $relink_command 2>&1`; then :
+      else
+	printf %s\n "$relink_command_output" >&2
+	rm -f "$progdir/$file"
+	exit 1
+      fi
+    fi
+
+    mv -f "$progdir/$file" "$progdir/$program" 2>/dev/null ||
+    { rm -f "$progdir/$program";
+      mv -f "$progdir/$file" "$progdir/$program"; }
+    rm -f "$progdir/$file"
+  fi
+
+  if test -f "$progdir/$program"; then
+    if test "$libtool_execute_magic" != "%%%MAGIC variable%%%"; then
+      # Run the actual program with our arguments.
+      func_exec_program ${1+"$@"}
+    fi
+  else
+    # The program doesn't exist.
+    $ECHO "$0: error: \`$progdir/$program' does not exist" 1>&2
+    $ECHO "This script is just a wrapper for $program." 1>&2
+    $ECHO "See the libtool documentation for more information." 1>&2
+    exit 1
+  fi
+fi
diff --git a/tests/unit-test-server.c b/tests/unit-test-server.c
new file mode 100644
index 0000000..9a986c5
--- /dev/null
+++ b/tests/unit-test-server.c
@@ -0,0 +1,155 @@
+/*
+ * Copyright © 2008-2010 Stéphane Raimbault <stephane.raimbault@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU 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 General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <modbus.h>
+
+#include "unit-test.h"
+
+enum {
+    TCP,
+    TCP_PI,
+    RTU
+};
+
+int main(int argc, char*argv[])
+{
+    int socket;
+    modbus_t *ctx;
+    modbus_mapping_t *mb_mapping;
+    int rc;
+    int i;
+    int use_backend;
+    uint8_t *query;
+    int header_length;
+
+    if (argc > 1) {
+        if (strcmp(argv[1], "tcp") == 0) {
+            use_backend = TCP;
+        } else if (strcmp(argv[1], "tcppi") == 0) {
+            use_backend = TCP_PI;
+        } else if (strcmp(argv[1], "rtu") == 0) {
+            use_backend = RTU;
+        } else {
+            printf("Usage:\n  %s [tcp|tcppi|rtu] - Modbus server for unit testing\n\n", argv[0]);
+            return -1;
+        }
+    } else {
+        /* By default */
+        use_backend = TCP;
+    }
+
+    if (use_backend == TCP) {
+        ctx = modbus_new_tcp("127.0.0.1", 1502);
+        query = malloc(MODBUS_TCP_MAX_ADU_LENGTH);
+    } else if (use_backend == TCP_PI) {
+        ctx = modbus_new_tcp_pi("::0", "1502");
+        query = malloc(MODBUS_TCP_MAX_ADU_LENGTH);
+    } else {
+        ctx = modbus_new_rtu("/dev/ttyUSB0", 115200, 'N', 8, 1);
+        modbus_set_slave(ctx, SERVER_ID);
+        query = malloc(MODBUS_RTU_MAX_ADU_LENGTH);
+    }
+    header_length = modbus_get_header_length(ctx);
+
+    modbus_set_debug(ctx, TRUE);
+
+    mb_mapping = modbus_mapping_new(
+        UT_BITS_ADDRESS + UT_BITS_NB,
+        UT_INPUT_BITS_ADDRESS + UT_INPUT_BITS_NB,
+        UT_REGISTERS_ADDRESS + UT_REGISTERS_NB,
+        UT_INPUT_REGISTERS_ADDRESS + UT_INPUT_REGISTERS_NB);
+    if (mb_mapping == NULL) {
+        fprintf(stderr, "Failed to allocate the mapping: %s\n",
+                modbus_strerror(errno));
+        modbus_free(ctx);
+        return -1;
+    }
+
+    /* Examples from PI_MODBUS_300.pdf.
+       Only the read-only input values are assigned. */
+
+    /** INPUT STATUS **/
+    modbus_set_bits_from_bytes(mb_mapping->tab_input_bits,
+                               UT_INPUT_BITS_ADDRESS, UT_INPUT_BITS_NB,
+                               UT_INPUT_BITS_TAB);
+
+    /** INPUT REGISTERS **/
+    for (i=0; i < UT_INPUT_REGISTERS_NB; i++) {
+        mb_mapping->tab_input_registers[UT_INPUT_REGISTERS_ADDRESS+i] =
+            UT_INPUT_REGISTERS_TAB[i];;
+    }
+
+    if (use_backend == TCP) {
+        socket = modbus_tcp_listen(ctx, 1);
+        modbus_tcp_accept(ctx, &socket);
+    } else if (use_backend == TCP_PI) {
+        socket = modbus_tcp_pi_listen(ctx, 1);
+        modbus_tcp_pi_accept(ctx, &socket);
+    } else {
+        rc = modbus_connect(ctx);
+        if (rc == -1) {
+            fprintf(stderr, "Unable to connect %s\n", modbus_strerror(errno));
+            modbus_free(ctx);
+            return -1;
+        }
+    }
+
+    for (;;) {
+        rc = modbus_receive(ctx, query);
+        if (rc == -1) {
+            /* Connection closed by the client or error */
+            break;
+        }
+
+        /* Read holding registers */
+        if (query[header_length] == 0x03) {
+            if (MODBUS_GET_INT16_FROM_INT8(query, header_length + 3)
+                == UT_REGISTERS_NB_SPECIAL) {
+                printf("Set an incorrect number of values\n");
+                MODBUS_SET_INT16_TO_INT8(query, header_length + 3,
+                                         UT_REGISTERS_NB_SPECIAL - 1);
+            } else if (MODBUS_GET_INT16_FROM_INT8(query, header_length + 1)
+                == UT_REGISTERS_ADDRESS_SPECIAL) {
+                printf("Reply to this special register address by an exception\n");
+                modbus_reply_exception(ctx, query,
+                                       MODBUS_EXCEPTION_SLAVE_OR_SERVER_BUSY);
+                continue;
+            }
+        }
+
+        rc = modbus_reply(ctx, query, rc, mb_mapping);
+        if (rc == -1) {
+            break;
+        }
+    }
+
+    printf("Quit the loop: %s\n", modbus_strerror(errno));
+
+    if (use_backend == TCP) {
+        close(socket);
+    }
+    modbus_mapping_free(mb_mapping);
+    free(query);
+    modbus_free(ctx);
+
+    return 0;
+}
diff --git a/tests/unit-test-server.o b/tests/unit-test-server.o
new file mode 100644
index 0000000..7d3a2de
--- /dev/null
+++ b/tests/unit-test-server.o
diff --git a/tests/unit-test.h b/tests/unit-test.h
new file mode 100644
index 0000000..78575c1
--- /dev/null
+++ b/tests/unit-test.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright © 2008-2010 Stéphane Raimbault <stephane.raimbault@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU 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 General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _UNIT_TEST_H_
+#define _UNIT_TEST_H_
+
+#include <config.h>
+
+#ifdef HAVE_INTTYPES_H
+#include <inttypes.h>
+#endif
+#ifdef HAVE_STDINT_H
+# ifndef _MSC_VER
+# include <stdint.h>
+# else
+# include "stdint.h"
+# endif
+#endif
+
+#define SERVER_ID         17
+#define INVALID_SERVER_ID 18
+
+const uint16_t UT_BITS_ADDRESS = 0x13;
+const uint16_t UT_BITS_NB = 0x25;
+const uint8_t UT_BITS_TAB[] = { 0xCD, 0x6B, 0xB2, 0x0E, 0x1B };
+
+const uint16_t UT_INPUT_BITS_ADDRESS = 0xC4;
+const uint16_t UT_INPUT_BITS_NB = 0x16;
+const uint8_t UT_INPUT_BITS_TAB[] = { 0xAC, 0xDB, 0x35 };
+
+const uint16_t UT_REGISTERS_ADDRESS = 0x6B;
+/* Raise a manual exception when this adress is used for the first byte */
+const uint16_t UT_REGISTERS_ADDRESS_SPECIAL = 0x6C;
+const uint16_t UT_REGISTERS_NB = 0x3;
+const uint16_t UT_REGISTERS_TAB[] = { 0x022B, 0x0001, 0x0064 };
+/* If the following value is used, a bad response is sent.
+   It's better to test with a lower value than
+   UT_REGISTERS_NB_POINTS to try to raise a segfault. */
+const uint16_t UT_REGISTERS_NB_SPECIAL = 0x2;
+
+const uint16_t UT_INPUT_REGISTERS_ADDRESS = 0x08;
+const uint16_t UT_INPUT_REGISTERS_NB = 0x1;
+const uint16_t UT_INPUT_REGISTERS_TAB[] = { 0x000A };
+
+const float UT_REAL = 916.540649;
+const uint32_t UT_IREAL = 0x4465229a;
+
+#endif /* _UNIT_TEST_H_ */
diff --git a/tests/version b/tests/version
new file mode 100755
index 0000000..7fa8075
--- /dev/null
+++ b/tests/version
@@ -0,0 +1,225 @@
+#! /bin/bash
+
+# version - temporary wrapper script for .libs/version
+# Generated by libtool (GNU libtool) 2.4 Debian-2.4-3
+#
+# The version program cannot be directly executed until all the libtool
+# libraries that it depends on are installed.
+#
+# This wrapper script should never be moved out of the build directory.
+# If it is, it will not operate correctly.
+
+# Sed substitution that helps us do robust quoting.  It backslashifies
+# metacharacters that are still active within double-quoted strings.
+sed_quote_subst='s/\([`"$\\]\)/\\\1/g'
+
+# Be Bourne compatible
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
+  emulate sh
+  NULLCMD=:
+  # Zsh 3.x and 4.x performs word splitting on ${1+"$@"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '${1+"$@"}'='"$@"'
+  setopt NO_GLOB_SUBST
+else
+  case `(set -o) 2>/dev/null` in *posix*) set -o posix;; esac
+fi
+BIN_SH=xpg4; export BIN_SH # for Tru64
+DUALCASE=1; export DUALCASE # for MKS sh
+
+# The HP-UX ksh and POSIX shell print the target directory to stdout
+# if CDPATH is set.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+relink_command="(cd /home/jmccrohan/bin/libmodbus/tests; { test -z \"\${LIBRARY_PATH+set}\" || unset LIBRARY_PATH || { LIBRARY_PATH=; export LIBRARY_PATH; }; }; { test -z \"\${COMPILER_PATH+set}\" || unset COMPILER_PATH || { COMPILER_PATH=; export COMPILER_PATH; }; }; { test -z \"\${GCC_EXEC_PREFIX+set}\" || unset GCC_EXEC_PREFIX || { GCC_EXEC_PREFIX=; export GCC_EXEC_PREFIX; }; }; { test -z \"\${LD_RUN_PATH+set}\" || unset LD_RUN_PATH || { LD_RUN_PATH=; export LD_RUN_PATH; }; }; { test -z \"\${LD_LIBRARY_PATH+set}\" || unset LD_LIBRARY_PATH || { LD_LIBRARY_PATH=; export LD_LIBRARY_PATH; }; }; PATH=/usr/sbin:/usr/bin:/sbin:/bin:/usr/bin/X11; export PATH; gcc -g -O2 -g -O2 -Wall -Werror -o \$progdir/\$file version.o  ../src/.libs/libmodbus.so -Wl,-rpath -Wl,/home/jmccrohan/bin/libmodbus/src/.libs)"
+
+# This environment variable determines our operation mode.
+if test "$libtool_install_magic" = "%%%MAGIC variable%%%"; then
+  # install mode needs the following variables:
+  generated_by_libtool_version='2.4'
+  notinst_deplibs=' ../src/libmodbus.la'
+else
+  # When we are sourced in execute mode, $file and $ECHO are already set.
+  if test "$libtool_execute_magic" != "%%%MAGIC variable%%%"; then
+    file="$0"
+
+# A function that is used when there is no print builtin or printf.
+func_fallback_echo ()
+{
+  eval 'cat <<_LTECHO_EOF
+$1
+_LTECHO_EOF'
+}
+    ECHO="printf %s\\n"
+  fi
+
+# Very basic option parsing. These options are (a) specific to
+# the libtool wrapper, (b) are identical between the wrapper
+# /script/ and the wrapper /executable/ which is used only on
+# windows platforms, and (c) all begin with the string --lt-
+# (application programs are unlikely to have options which match
+# this pattern).
+#
+# There are only two supported options: --lt-debug and
+# --lt-dump-script. There is, deliberately, no --lt-help.
+#
+# The first argument to this parsing function should be the
+# script's ../libtool value, followed by no.
+lt_option_debug=
+func_parse_lt_options ()
+{
+  lt_script_arg0=$0
+  shift
+  for lt_opt
+  do
+    case "$lt_opt" in
+    --lt-debug) lt_option_debug=1 ;;
+    --lt-dump-script)
+        lt_dump_D=`$ECHO "X$lt_script_arg0" | /bin/sed -e 's/^X//' -e 's%/[^/]*$%%'`
+        test "X$lt_dump_D" = "X$lt_script_arg0" && lt_dump_D=.
+        lt_dump_F=`$ECHO "X$lt_script_arg0" | /bin/sed -e 's/^X//' -e 's%^.*/%%'`
+        cat "$lt_dump_D/$lt_dump_F"
+        exit 0
+      ;;
+    --lt-*)
+        $ECHO "Unrecognized --lt- option: '$lt_opt'" 1>&2
+        exit 1
+      ;;
+    esac
+  done
+
+  # Print the debug banner immediately:
+  if test -n "$lt_option_debug"; then
+    echo "version:version:${LINENO}: libtool wrapper (GNU libtool) 2.4 Debian-2.4-3" 1>&2
+  fi
+}
+
+# Used when --lt-debug. Prints its arguments to stdout
+# (redirection is the responsibility of the caller)
+func_lt_dump_args ()
+{
+  lt_dump_args_N=1;
+  for lt_arg
+  do
+    $ECHO "version:version:${LINENO}: newargv[$lt_dump_args_N]: $lt_arg"
+    lt_dump_args_N=`expr $lt_dump_args_N + 1`
+  done
+}
+
+# Core function for launching the target application
+func_exec_program_core ()
+{
+
+      if test -n "$lt_option_debug"; then
+        $ECHO "version:version:${LINENO}: newargv[0]: $progdir/$program" 1>&2
+        func_lt_dump_args ${1+"$@"} 1>&2
+      fi
+      exec "$progdir/$program" ${1+"$@"}
+
+      $ECHO "$0: cannot exec $program $*" 1>&2
+      exit 1
+}
+
+# A function to encapsulate launching the target application
+# Strips options in the --lt-* namespace from $@ and
+# launches target application with the remaining arguments.
+func_exec_program ()
+{
+  for lt_wr_arg
+  do
+    case $lt_wr_arg in
+    --lt-*) ;;
+    *) set x "$@" "$lt_wr_arg"; shift;;
+    esac
+    shift
+  done
+  func_exec_program_core ${1+"$@"}
+}
+
+  # Parse options
+  func_parse_lt_options "$0" ${1+"$@"}
+
+  # Find the directory that this script lives in.
+  thisdir=`$ECHO "$file" | /bin/sed 's%/[^/]*$%%'`
+  test "x$thisdir" = "x$file" && thisdir=.
+
+  # Follow symbolic links until we get to the real thisdir.
+  file=`ls -ld "$file" | /bin/sed -n 's/.*-> //p'`
+  while test -n "$file"; do
+    destdir=`$ECHO "$file" | /bin/sed 's%/[^/]*$%%'`
+
+    # If there was a directory component, then change thisdir.
+    if test "x$destdir" != "x$file"; then
+      case "$destdir" in
+      [\\/]* | [A-Za-z]:[\\/]*) thisdir="$destdir" ;;
+      *) thisdir="$thisdir/$destdir" ;;
+      esac
+    fi
+
+    file=`$ECHO "$file" | /bin/sed 's%^.*/%%'`
+    file=`ls -ld "$thisdir/$file" | /bin/sed -n 's/.*-> //p'`
+  done
+
+  # Usually 'no', except on cygwin/mingw when embedded into
+  # the cwrapper.
+  WRAPPER_SCRIPT_BELONGS_IN_OBJDIR=no
+  if test "$WRAPPER_SCRIPT_BELONGS_IN_OBJDIR" = "yes"; then
+    # special case for '.'
+    if test "$thisdir" = "."; then
+      thisdir=`pwd`
+    fi
+    # remove .libs from thisdir
+    case "$thisdir" in
+    *[\\/].libs ) thisdir=`$ECHO "$thisdir" | /bin/sed 's%[\\/][^\\/]*$%%'` ;;
+    .libs )   thisdir=. ;;
+    esac
+  fi
+
+  # Try to get the absolute directory name.
+  absdir=`cd "$thisdir" && pwd`
+  test -n "$absdir" && thisdir="$absdir"
+
+  program=lt-'version'
+  progdir="$thisdir/.libs"
+
+  if test ! -f "$progdir/$program" ||
+     { file=`ls -1dt "$progdir/$program" "$progdir/../$program" 2>/dev/null | /bin/sed 1q`; \
+       test "X$file" != "X$progdir/$program"; }; then
+
+    file="$$-$program"
+
+    if test ! -d "$progdir"; then
+      mkdir "$progdir"
+    else
+      rm -f "$progdir/$file"
+    fi
+
+    # relink executable if necessary
+    if test -n "$relink_command"; then
+      if relink_command_output=`eval $relink_command 2>&1`; then :
+      else
+	printf %s\n "$relink_command_output" >&2
+	rm -f "$progdir/$file"
+	exit 1
+      fi
+    fi
+
+    mv -f "$progdir/$file" "$progdir/$program" 2>/dev/null ||
+    { rm -f "$progdir/$program";
+      mv -f "$progdir/$file" "$progdir/$program"; }
+    rm -f "$progdir/$file"
+  fi
+
+  if test -f "$progdir/$program"; then
+    if test "$libtool_execute_magic" != "%%%MAGIC variable%%%"; then
+      # Run the actual program with our arguments.
+      func_exec_program ${1+"$@"}
+    fi
+  else
+    # The program doesn't exist.
+    $ECHO "$0: error: \`$progdir/$program' does not exist" 1>&2
+    $ECHO "This script is just a wrapper for $program." 1>&2
+    $ECHO "See the libtool documentation for more information." 1>&2
+    exit 1
+  fi
+fi
diff --git a/tests/version.c b/tests/version.c
new file mode 100644
index 0000000..e0fc569
--- /dev/null
+++ b/tests/version.c
@@ -0,0 +1,36 @@
+/*
+ * Copyright © 2010 Stéphane Raimbault <stephane.raimbault@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU 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 General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <modbus.h>
+
+int main(void)
+{
+    printf("Compiled with libmodbus version %s\n", LIBMODBUS_VERSION_STRING);
+    printf("Linked with libmodbus version %d.%d.%d\n",
+           libmodbus_version_major, libmodbus_version_minor, libmodbus_version_micro);
+
+    if (LIBMODBUS_VERSION_CHECK(2, 1, 0)) {
+        printf("The functions to read/write float values are available (2.1.0).\n");
+    }
+
+    if (LIBMODBUS_VERSION_CHECK(2, 1, 1)) {
+        printf("Oh gosh, brand new API (2.1.1)!\n");
+    }
+
+    return 0;
+}
diff --git a/tests/version.o b/tests/version.o
new file mode 100644
index 0000000..fa29586
--- /dev/null
+++ b/tests/version.o