############################################################################
# FindMdebTLS.txt
# Copyright (C) 2015  Belledonne Communications, Grenoble France
#
############################################################################
#
# 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 2
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
#
############################################################################
#
# - Find the mbedTLS include file and library
#
#  MBEDTLS_FOUND - system has mbedTLS
#  MBEDTLS_INCLUDE_DIRS - the mbedTLS include directory
#  MBEDTLS_LIBRARIES - The libraries needed to use mbedTLS

include(CMakePushCheckState)
include(CheckIncludeFile)
include(CheckCSourceCompiles)
include(CheckSymbolExists)

find_path(MBEDTLS_INCLUDE_DIRS
        NAMES mbedtls/ssl.h
        PATH_SUFFIXES include
        )

# find the three mbedtls library
find_library(MBEDTLS_LIBRARY
        NAMES mbedtls
        )

find_library(MBEDX509_LIBRARY
        NAMES mbedx509
        )

find_library(MBEDCRYPTO_LIBRARY
        NAMES mbedcrypto
        )

cmake_push_check_state(RESET)
set(CMAKE_REQUIRED_INCLUDES ${MBEDTLS_INCLUDE_DIRS} ${CMAKE_REQUIRED_INCLUDES_${BUILD_TYPE}})
list(APPEND CMAKE_REQUIRED_LIBRARIES ${MBEDTLS_LIBRARY} ${MBEDX509_LIBRARY} ${MBEDCRYPTO_LIBRARY})

# check we have a mbedTLS version 2 or above(all functions are prefixed mbedtls_)
if (MBEDTLS_LIBRARY AND MBEDX509_LIBRARY AND MBEDCRYPTO_LIBRARY)
    check_symbol_exists(mbedtls_ssl_init "mbedtls/ssl.h" MBEDTLS_V2)
    if (MBEDTLS_V2)
        set(MBEDTLS_LIBRARIES
                ${MBEDTLS_LIBRARY}
                ${MBEDX509_LIBRARY}
                ${MBEDCRYPTO_LIBRARY}
                )
    else ()
        message("MESSAGE: NO MBEDTLS_V2")
        message("MESSAGE: MBEDTLS_LIBRARY=" ${MBEDTLS_LIBRARY})
        message("MESSAGE: MBEDX509_LIBRARY=" ${MBEDX509_LIBRARY})
        message("MESSAGE: MBEDCRYPTO_LIBRARY=" ${MBEDCRYPTO_LIBRARY})

    endif ()

endif ()

if (MBEDTLS_LIBRARIES)
    check_symbol_exists(mbedtls_ssl_get_dtls_srtp_protection_profile "mbedtls/ssl.h" HAVE_SSL_GET_DTLS_SRTP_PROTECTION_PROFILE)
endif ()

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(MbedTLS
        DEFAULT_MSG
        MBEDTLS_INCLUDE_DIRS MBEDTLS_LIBRARIES
        )

cmake_pop_check_state()

mark_as_advanced(MBEDTLS_INCLUDE_DIRS MBEDTLS_LIBRARIES HAVE_SSL_GET_DTLS_SRTP_PROTECTION_PROFILE)
