# Copyright (c) 2016-2023, OARC, Inc.
# Copyright (c) 2007, The Measurement Factory, Inc.
# Copyright (c) 2007, Internet Systems Consortium, Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in
#    the documentation and/or other materials provided with the
#    distribution.
#
# 3. Neither the name of the copyright holder nor the names of its
#    contributors may be used to endorse or promote products derived
#    from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.

AC_PREREQ(2.61)
AC_INIT([dnscap], [2.2.0], [dnscap-users@dns-oarc.net], [dnscap], [https://github.com/DNS-OARC/dnscap/issues])
AM_INIT_AUTOMAKE([-Wall -Werror foreign subdir-objects])
AC_CONFIG_SRCDIR([src/dnscap.c])
AC_CONFIG_HEADER([src/config.h])
AC_CONFIG_MACRO_DIR([m4])

# Checks for programs.
AC_PROG_CC
AM_PROG_CC_C_O
AC_CANONICAL_HOST
m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
LT_INIT([disable-static])

# Check --enable-warn-all
AC_ARG_ENABLE([warn-all], [AS_HELP_STRING([--enable-warn-all], [Enable all compiler warnings])], [AX_CFLAGS_WARN_ALL()])

# Check --with-extra-cflags
AC_ARG_WITH([extra-cflags], [AS_HELP_STRING([--with-extra-cflags=CFLAGS], [Add extra CFLAGS])], [
  AC_MSG_NOTICE([appending extra CFLAGS... $withval])
  AS_VAR_APPEND(CFLAGS, [" $withval"])
])

# Check --with-extra-ldflags
AC_ARG_WITH([extra-ldflags], [AS_HELP_STRING([--with-extra-ldflags=LDFLAGS], [Add extra LDFLAGS])], [
  AC_MSG_NOTICE([appending extra LDFLAGS... $withval])
  AS_VAR_APPEND(LDFLAGS, [" $withval"])
])

# pcap_thread
AC_ARG_ENABLE(threads,
    [AS_HELP_STRING([--enable-threads],
        [enable the usage of threads (default disabled)])],
    [AX_PCAP_THREAD],
    [AX_PCAP_THREAD_PCAP])

# Check --enable-gcov
AC_ARG_ENABLE([gcov], [AS_HELP_STRING([--enable-gcov], [Enable coverage testing])], [
  coverage_cflags="--coverage -g -O0 -fno-inline -fno-inline-small-functions -fno-default-inline"
  AC_MSG_NOTICE([enabling coverage testing... $coverage_cflags])
  AS_VAR_APPEND(CFLAGS, [" $coverage_cflags"])
])
AM_CONDITIONAL([ENABLE_GCOV], [test "x$enable_gcov" != "xno"])
AM_EXTRA_RECURSIVE_TARGETS([gcov])

# Checks for libraries.
AC_CHECK_LIB([dl], [dlopen])
AC_CHECK_LIB([tinycbor], [cbor_parser_init])
AM_CONDITIONAL([HAVE_CBOR], [test "x$ac_cv_lib_tinycbor_cbor_parser_init" = "xyes"])
AC_CHECK_LIB([z], [gzopen])
PKG_CHECK_MODULES([libcrypto], [libcrypto],
    [AC_DEFINE([HAVE_LIBCRYPTO], [1], [Define to 1 if you have libcrypto.])])
AC_CHECK_LIB([cryptopant], [scramble_init], [], [
    AC_CHECK_LIB([cryptopANT], [scramble_init])
])
PKG_CHECK_MODULES([libldns], [libldns], , [
  PKG_CHECK_MODULES([libldns], [ldns])
])

# Check for OS specific libraries
case "$host_os" in
    # HPUX
    hpux*)
        AC_CHECK_LIB([hplx], [main])
        ;;

    # Solaris
    solaris*)
        AC_CHECK_LIB([rt], [main])
        AC_CHECK_LIB([md5], [main])
        AC_CHECK_LIB([socket], [main])
        AC_CHECK_LIB([nsl], [main])
        ;;
esac

# Checks for header files.
AC_HEADER_RESOLV
AC_HEADER_TIME
AC_CHECK_HEADERS([arpa/inet.h fcntl.h netdb.h netinet/in.h stdlib.h string.h])
AC_CHECK_HEADERS([sys/ioctl.h sys/param.h sys/socket.h sys/time.h unistd.h])
AC_CHECK_HEADERS([ldns/ldns.h arpa/nameser_compat.h cbor.h cbor/cbor.h])
AC_CHECK_HEADERS([sys/time.h])
AC_CHECK_HEADERS([zlib.h])
AC_CHECK_HEADERS([openssl/conf.h openssl/evp.h openssl/err.h])
AC_CHECK_HEADERS([cryptopANT.h])
AC_CHECK_HEADERS([endian.h sys/endian.h machine/endian.h])

# Checks for library functions.
AC_CHECK_FUNCS([snprintf])
AC_CHECK_FUNCS([setreuid setresuid setregid setresgid setegid seteuid initgroups setgroups])
AC_CHECK_FUNCS([funopen fopencookie gzopen])
AC_CHECK_FUNCS([__assertion_failed])

# Check for SECCOMP
SECCOMPFLAGS=
AC_ARG_ENABLE(seccomp, AC_HELP_STRING([--enable-seccomp], [Linux seccomp-bpf sandbox]))
case "$enable_seccomp" in
    yes)
        AC_DEFINE_UNQUOTED([USE_SECCOMP], [1], [Define this to enable Linux seccomp-bpf sandbox.])
        SECCOMPFLAGS="-lseccomp -fPIE -fstack-protector-all -Wl,-z,relro -Wformat -Wformat-security -Werror=format-security -D_FORTIFY_SOURCE=2"
        ;;

    *)
        ;;
esac
AC_SUBST(SECCOMPFLAGS, ["$SECCOMPFLAGS"])

# Output Makefiles
AC_CONFIG_FILES([
    Makefile
    src/Makefile
	src/test/Makefile
    plugins/Makefile
    plugins/pcapdump/Makefile
    plugins/rssm/Makefile
    plugins/txtout/Makefile
    plugins/rzkeychange/Makefile
    plugins/royparse/Makefile
    plugins/anonmask/Makefile
    plugins/ipcrypt/Makefile
	plugins/anonaes128/Makefile
	plugins/cryptopan/Makefile
    plugins/cryptopant/Makefile
    plugins/eventlog/Makefile
])
AC_OUTPUT