dnl @(#) Header: /tcpdump/master/tcpdump/configure.in,v 1.188.2.7 2005/09/21 16:50:01 guy Exp (LBL)
dnl
dnl Copyright (c) 1994, 1995, 1996, 1997
dnl	The Regents of the University of California.  All rights reserved.
dnl
dnl Process this file with autoconf to produce a configure script.
dnl

AC_REVISION(Revision: 1.188.2.7)
AC_PREREQ(2.50)
AC_INIT(tcpdump.c)

AC_CANONICAL_HOST

AC_LBL_C_INIT(V_CCOPT, V_INCLS)
AC_LBL_C_INLINE
AC_C___ATTRIBUTE__
AC_CHECK_HEADERS(fcntl.h rpc/rpcent.h netdnet/dnetdb.h)
AC_CHECK_HEADERS(netinet/if_ether.h, , , [#include <sys/types.h>
#include <sys/socket.h>])
if test "$ac_cv_header_netinet_if_ether_h" != yes; then
	#
	# The simple test didn't work.
	# Do we need to include <net/if.h> first?
	# Unset ac_cv_header_netinet_if_ether_h so we don't
	# treat the previous failure as a cached value and
	# suppress the next test.
	#
	AC_MSG_NOTICE([Rechecking with some additional includes])
	unset ac_cv_header_netinet_if_ether_h
	AC_CHECK_HEADERS(netinet/if_ether.h, , , [#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
struct mbuf;
struct rtentry;
#include <net/if.h>])
fi

AC_HEADER_TIME

case "$host_os" in

linux*)
	AC_MSG_CHECKING(Linux kernel version)
 	if test "$cross_compiling" = yes; then
 		AC_CACHE_VAL(ac_cv_linux_vers,
 		    ac_cv_linux_vers=unknown)
 	else
 		AC_CACHE_VAL(ac_cv_linux_vers,
 		    ac_cv_linux_vers=`uname -r 2>&1 | \
 			sed -n -e '$s/.* //' -e '$s/\..*//p'`)
 	fi
	AC_MSG_RESULT($ac_cv_linux_vers)
 	if test $ac_cv_linux_vers = unknown ; then
 		AC_MSG_ERROR(cannot determine linux version when cross-compiling)
 	fi
	if test $ac_cv_linux_vers -lt 2 ; then
		AC_MSG_ERROR(version 2 or higher required; see the INSTALL doc for more info)
	fi
	;;

*)
	;;
esac


AC_CHECK_HEADERS(smi.h)
AC_CHECK_LIB(smi, smiInit)
if test "$ac_cv_header_smi_h" = yes -a "$ac_cv_lib_smi_smiInit" = yes
then
AC_MSG_CHECKING([whether to enable libsmi])
        AC_TRY_RUN([ /* libsmi available check */
#include <smi.h>
main()
{
  int current, revision, age, n;
  const int required = 2;
  if (smiInit("")) 
    exit(1);
  if (strcmp(SMI_LIBRARY_VERSION, smi_library_version))
    exit(2);
  n = sscanf(smi_library_version, "%d:%d:%d", &current, &revision, &age);
  if (n != 3)
    exit(3);
  if (required < current - age || required > current)
    exit(4);
  exit(0);
}
],
[ AC_MSG_RESULT(yes)
  AC_DEFINE(LIBSMI)
  libsmi=yes],
dnl autoconf documentation says that $? contains the exit value.
dnl reality is that it does not.  We leave this in just in case
dnl autoconf ever comes back to match the documentation.
[ case $? in
  1) AC_MSG_RESULT(no - smiInit failed) ;;
  2) AC_MSG_RESULT(no - header/library version mismatch) ;;
  3) AC_MSG_RESULT(no - can't determine library version) ;;
  4) AC_MSG_RESULT(no - too old) ;;
  *) AC_MSG_RESULT(no) ;;
  esac
  libsmi=no],
[ AC_MSG_RESULT(not when cross-compiling)
  libsmi=no]
)
fi

AC_MSG_CHECKING([whether to enable the possibly-buggy SMB printer])
AC_ARG_ENABLE(smb,
[  --enable-smb            enable possibly-buggy SMB printer [default=yes]
  --disable-smb           disable possibly-buggy SMB printer],,
   enableval=yes)
case "$enableval" in
yes)	AC_MSG_RESULT(yes)
	AC_WARN([The SMB printer may have exploitable buffer overflows!!!])
	AC_DEFINE(TCPDUMP_DO_SMB)
	LOCALSRC="print-smb.c smbutil.c $LOCALSRC"
	;;
*)	AC_MSG_RESULT(no)
	;;
esac

AC_ARG_WITH(user, [  --with-user=USERNAME    drop privileges by default to USERNAME])
AC_MSG_CHECKING([whether to drop root privileges by default])
if test ! -z "$with_user" ; then
        AC_DEFINE_UNQUOTED(WITH_USER, "$withval")
       AC_MSG_RESULT(to \"$withval\")
else
       AC_MSG_RESULT(no)
fi

AC_ARG_WITH(chroot, [  --with-chroot=DIRECTORY when dropping privileges, chroot to DIRECTORY])
AC_MSG_CHECKING([whether to chroot])
if test ! -z "$with_chroot" ; then
        AC_DEFINE_UNQUOTED(WITH_CHROOT, "$withval")
       AC_MSG_RESULT(to \"$withval\")
else
       AC_MSG_RESULT(no)
fi

AC_MSG_CHECKING([whether to enable ipv6])
AC_ARG_ENABLE(ipv6,
[  --enable-ipv6           enable ipv6 (with ipv4) support
  --disable-ipv6          disable ipv6 support],
[ case "$enableval" in
yes)   AC_MSG_RESULT(yes)
       LOCALSRC="print-ip6.c print-ip6opts.c print-mobility.c print-ripng.c print-icmp6.c print-frag6.c print-rt6.c print-ospf6.c print-dhcp6.c $LOCALSRC"
       AC_DEFINE(INET6)
       ipv6=yes
       ;;
*)
       AC_MSG_RESULT(no)
       ipv6=no
       ;;
  esac ],

  AC_TRY_RUN([ /* AF_INET6 available check */
#include <sys/types.h>
#include <sys/socket.h>
main()
{
 if (socket(AF_INET6, SOCK_STREAM, 0) < 0)
   exit(1);
 else
   exit(0);
}
],
[ AC_MSG_RESULT(yes)
  LOCALSRC="print-ip6.c print-ip6opts.c print-mobility.c print-ripng.c print-icmp6.c print-frag6.c print-rt6.c print-ospf6.c print-dhcp6.c $LOCALSRC"
  AC_DEFINE(INET6)
  ipv6=yes],
[ AC_MSG_RESULT(no)
  ipv6=no],
[ AC_MSG_RESULT(no)
  ipv6=no]
))

ipv6type=unknown
ipv6lib=none
ipv6trylibc=no

if test "$ipv6" = "yes"; then
	AC_MSG_CHECKING([ipv6 stack type])
	for i in inria kame linux-glibc linux-libinet6 toshiba v6d zeta; do
		case $i in
		inria)
			dnl http://www.kame.net/
			AC_EGREP_CPP(yes,
[#include <netinet/in.h>
#ifdef IPV6_INRIA_VERSION
yes
#endif],
				[ipv6type=$i;
				CFLAGS="-DINET6 $CFLAGS"])
			;;
		kame)
			dnl http://www.kame.net/
			AC_EGREP_CPP(yes,
[#include <netinet/in.h>
#ifdef __KAME__
yes
#endif],
				[ipv6type=$i;
				ipv6lib=inet6;
				ipv6libdir=/usr/local/v6/lib;
				ipv6trylibc=yes;
				CFLAGS="-DINET6 $CFLAGS"])
			;;
		linux-glibc)
			dnl http://www.v6.linux.or.jp/
			AC_EGREP_CPP(yes,
[#include <features.h>
#if defined(__GLIBC__) && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1
yes
#endif],
				[ipv6type=$i;
				CFLAGS="-DINET6 $CFLAGS"])
			;;
		linux-libinet6)
			dnl http://www.v6.linux.or.jp/
			dnl
			dnl This also matches Solaris 8 and Tru64 UNIX 5.1,
			dnl and possibly other versions of those OSes
			dnl
			if test -d /usr/inet6 -o -f /usr/include/netinet/ip6.h; then
				ipv6type=$i
				ipv6lib=inet6
				ipv6libdir=/usr/inet6/lib
				ipv6trylibc=yes;
				CFLAGS="-DINET6 -I/usr/inet6/include $CFLAGS"
			fi
			;;
		toshiba)
			AC_EGREP_CPP(yes,
[#include <sys/param.h>
#ifdef _TOSHIBA_INET6
yes
#endif],
				[ipv6type=$i;
				ipv6lib=inet6;
				ipv6libdir=/usr/local/v6/lib;
				CFLAGS="-DINET6 $CFLAGS"])
			;;
		v6d)
			AC_EGREP_CPP(yes,
[#include </usr/local/v6/include/sys/v6config.h>
#ifdef __V6D__
yes
#endif],
				[ipv6type=$i;
				ipv6lib=v6;
				ipv6libdir=/usr/local/v6/lib;
				CFLAGS="-I/usr/local/v6/include $CFLAGS"])
			;;
		zeta)
			AC_EGREP_CPP(yes,
[#include <sys/param.h>
#ifdef _ZETA_MINAMI_INET6
yes
#endif],
				[ipv6type=$i;
				ipv6lib=inet6;
				ipv6libdir=/usr/local/v6/lib;
				CFLAGS="-DINET6 $CFLAGS"])
			;;
		esac
		if test "$ipv6type" != "unknown"; then
			break
		fi
	done
	AC_MSG_RESULT($ipv6type)
fi

if test "$ipv6" = "yes" -a "$ipv6lib" != "none"; then
	if test -d $ipv6libdir -a -f $ipv6libdir/lib$ipv6lib.a; then
		LIBS="-L$ipv6libdir -l$ipv6lib $LIBS"
		echo "You have $ipv6lib library, using it"
	else
		if test "$ipv6trylibc" = "yes"; then
			echo "You do not have $ipv6lib library, using libc"
		else
			echo 'Fatal: no $ipv6lib library found.  cannot continue.'
			echo "You need to fetch lib$ipv6lib.a from appropriate"
			echo 'ipv6 kit and compile beforehand.'
			exit 1
		fi
	fi
fi


if test "$ipv6" = "yes"; then
	#
	# XXX - on Tru64 UNIX 5.1, there is no "getaddrinfo()"
	# function in libc; there are "ngetaddrinfo()" and
	# "ogetaddrinfo()" functions, and <netdb.h> #defines
	# "getaddrinfo" to be either "ngetaddrinfo" or
	# "ogetaddrinfo", depending on whether _SOCKADDR_LEN
	# or _XOPEN_SOURCE_EXTENDED are defined or not.
	#
	# So this test doesn't work on Tru64 5.1, and possibly
	# on other 5.x releases.  This causes the configure
	# script to become confused, and results in libpcap
	# being unbuildable.
	#
	AC_SEARCH_LIBS(getaddrinfo, socket, [dnl
	AC_MSG_CHECKING(getaddrinfo bug)
	AC_CACHE_VAL(td_cv_buggygetaddrinfo, [AC_TRY_RUN([
#include <sys/types.h>
#include <netdb.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>

main()
{
  int passive, gaierr, inet4 = 0, inet6 = 0;
  struct addrinfo hints, *ai, *aitop;
  char straddr[INET6_ADDRSTRLEN], strport[16];

  for (passive = 0; passive <= 1; passive++) {
    memset(&hints, 0, sizeof(hints));
    hints.ai_family = AF_UNSPEC;
    hints.ai_flags = passive ? AI_PASSIVE : 0;
    hints.ai_socktype = SOCK_STREAM;
    hints.ai_protocol = IPPROTO_TCP;
    if ((gaierr = getaddrinfo(NULL, "54321", &hints, &aitop)) != 0) {
      (void)gai_strerror(gaierr);
      goto bad;
    }
    for (ai = aitop; ai; ai = ai->ai_next) {
      if (ai->ai_addr == NULL ||
          ai->ai_addrlen == 0 ||
          getnameinfo(ai->ai_addr, ai->ai_addrlen,
                      straddr, sizeof(straddr), strport, sizeof(strport),
                      NI_NUMERICHOST|NI_NUMERICSERV) != 0) {
        goto bad;
      }
      switch (ai->ai_family) {
      case AF_INET:
        if (strcmp(strport, "54321") != 0) {
          goto bad;
        }
        if (passive) {
          if (strcmp(straddr, "0.0.0.0") != 0) {
            goto bad;
          }
        } else {
          if (strcmp(straddr, "127.0.0.1") != 0) {
            goto bad;
          }
        }
        inet4++;
        break;
      case AF_INET6:
        if (strcmp(strport, "54321") != 0) {
          goto bad;
        }
        if (passive) {
          if (strcmp(straddr, "::") != 0) {
            goto bad;
          }
        } else {
          if (strcmp(straddr, "::1") != 0) {
            goto bad;
          }
        }
        inet6++;
        break;
      case AF_UNSPEC:
        goto bad;
        break;
#ifdef AF_UNIX
      case AF_UNIX:
#else
#ifdef AF_LOCAL
      case AF_LOCAL:
#endif
#endif
      default:
        /* another family support? */
        break;
      }
    }
  }

  /* supported family should be 2, unsupported family should be 0 */
  if (!(inet4 == 0 || inet4 == 2))
    goto bad;
  if (!(inet6 == 0 || inet6 == 2))
    goto bad;

  if (aitop)
    freeaddrinfo(aitop);
  exit(0);

 bad:
  if (aitop)
    freeaddrinfo(aitop);
  exit(1);
}
],
	td_cv_buggygetaddrinfo=no,
	td_cv_buggygetaddrinfo=yes,
	td_cv_buggygetaddrinfo=yes)])
	if test "$td_cv_buggygetaddrinfo" = no; then
		AC_MSG_RESULT(good)
	else
		AC_MSG_RESULT(buggy)
	fi

	if test "$td_cv_buggygetaddrinfo" = "yes"; then
		#
		# XXX - it doesn't appear that "ipv6type" can ever be
		# set to "linux".  Should this be testing for
		# "linux-glibc", or for that *or* "linux-libinet6"?
		# If the latter, note that "linux-libinet6" is also
		# the type given to some non-Linux OSes.
		#
		if test "$ipv6type" != "linux"; then
			echo 'Fatal: You must get working getaddrinfo() function.'
			echo '       or you can specify "--disable-ipv6"'.
			exit 1
		else
			echo 'Warning: getaddrinfo() implementation on your system seems be buggy.'
			echo '         Better upgrade your system library to newest version'
			echo '         of GNU C library (aka glibc).'
		fi
	fi
	])
	AC_REPLACE_FUNCS(getaddrinfo getnameinfo)
fi

AC_CACHE_CHECK([for dnet_htoa declaration in netdnet/dnetdb.h],
[td_cv_decl_netdnet_dnetdb_h_dnet_htoa],
[AC_EGREP_HEADER(dnet_htoa, netdnet/dnetdb.h,
	td_cv_decl_netdnet_dnetdb_h_dnet_htoa=yes,
	td_cv_decl_netdnet_dnetdb_h_dnet_htoa=no)])
if test "$td_cv_decl_netdnet_dnetdb_h_dnet_htoa" = yes; then
	AC_DEFINE(HAVE_NETDNET_DNETDB_H_DNET_HTOA)
fi

dnl
dnl check sizeof basic types.
dnl They're very likely to be wrong for cross-compiling.
AC_CHECK_SIZEOF(char, 1)
AC_CHECK_SIZEOF(short, 2)
AC_CHECK_SIZEOF(int, 4)
AC_CHECK_SIZEOF(long, 4)
AC_CHECK_SIZEOF(long long, 8)

dnl
dnl Checks for u_intXX_t
dnl AC_CHECK_BITTYPES(ac_cv_bittypes)
dnl if test "$ac_cv_bittypes" = no; then
dnl 	missing_includes=yes
dnl fi

dnl
dnl Checks for addrinfo structure
AC_STRUCT_ADDRINFO(ac_cv_addrinfo)
if test "$ac_cv_addrinfo" = no; then
	missing_includes=yes
fi

dnl
dnl Checks for NI_MAXSERV
AC_NI_MAXSERV(ac_cv_maxserv)
if test "$ac_cv_maxserv" = no; then
	missing_includes=yes
fi

dnl
dnl Checks for NI_NAMEREQD
AC_NI_NAMEREQD(ac_cv_namereqd)
if test "$ac_cv_namereqd" = no; then
	missing_includes=yes
fi

dnl
dnl Checks for sockaddr_storage structure
AC_STRUCT_SA_STORAGE(ac_cv_sa_storage)
if test "$ac_cv_sa_storage" = no; then
	missing_includes=yes
fi

dnl
dnl Checks for IN[6]ADDRSZ
AC_CHECK_ADDRSZ(ac_cv_addrsz)
if test "$ac_cv_addrsz" = no; then
	missing_includes=yes
fi

dnl
dnl Checks for RES_USE_INET6
AC_CHECK_RES_USE_INET6(ac_cv_res_inet6)
if test "$ac_cv_res_inet6" = no; then
	missing_includes=yes
fi

dnl
dnl Checks for res_state_ext structure
AC_STRUCT_RES_STATE_EXT(ac_cv_res_state_ext)
if test "$ac_cv_res_state_ext" = no; then
	missing_includes=yes
fi

dnl
dnl Checks if res_state structure has nsort member.
AC_STRUCT_RES_STATE(ac_cv_res_state)


AC_REPLACE_FUNCS(vfprintf strcasecmp strlcat strlcpy strdup strsep)
AC_CHECK_FUNCS(strftime)
AC_CHECK_FUNCS(setlinebuf alarm)

needsnprintf=no
AC_CHECK_FUNCS(vsnprintf snprintf,,
	[needsnprintf=yes])
if test $needsnprintf = yes; then
	AC_LIBOBJ(snprintf)
fi

AC_LBL_TYPE_SIGNAL

AC_SEARCH_LIBS(dnet_htoa, dnet, AC_DEFINE(HAVE_DNET_HTOA))

AC_CHECK_LIB(rpc, main)		dnl It's unclear why we might need -lrpc

dnl Some platforms may need -lnsl for getrpcbynumber.
AC_SEARCH_LIBS(getrpcbynumber, nsl, AC_DEFINE(HAVE_GETRPCBYNUMBER))

dnl AC_CHECK_LIB(z, uncompress)
dnl AC_CHECK_HEADERS(zlib.h)

AC_LBL_LIBPCAP(V_PCAPDEP, V_INCLS)

#
# Check for these after AC_LBL_LIBPCAP, so we link with the appropriate
# libraries (e.g., "-lsocket -lnsl" on Solaris).
#
# We don't use AC_REPLACE_FUNCS because that uses AC_CHECK_FUNCS which
# use AC_CHECK_FUNC which doesn't let us specify the right #includes
# to make this work on BSD/OS 4.x.  BSD/OS 4.x ships with the BIND8
# resolver, and the way it defines inet_{ntop,pton} is rather strange;
# it does not ship with a libc symbol "inet_ntop()", it ships with
# "_inet_ntop()", and has a #define macro in one of the system headers
# to rename it.
#
dnl AC_TRY_COMPILE(inet_ntop inet_pton inet_aton)
AC_MSG_CHECKING(for inet_ntop)
AC_TRY_LINK([#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>], [char src[4], dst[128];
inet_ntop(AF_INET, src, dst, sizeof(dst));],
	[AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no)
	AC_LIBOBJ(inet_ntop)])
AC_MSG_CHECKING(for inet_pton)
AC_TRY_LINK([#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>], [char src[128], dst[4];
inet_pton(AF_INET, src, dst);],
	[AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no)
	AC_LIBOBJ(inet_pton)])
AC_MSG_CHECKING(for inet_aton)
AC_TRY_LINK([#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>], [char src[128];
struct in_addr dst;
inet_aton(src, &dst);],
	[AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no)
	AC_LIBOBJ(inet_aton)])

#
# Check for these after AC_LBL_LIBPCAP, for the same reason.
#
# You are in a twisty little maze of UN*Xes, all different.
# Some might not have ether_ntohost().
# Some might have it, but not declare it in any header file.
# Some might have it, but declare it in <netinet/if_ether.h>.
# Some might have it, but declare it in <netinet/ether.h>
# (And some might have it but document it as something declared in
# <netinet/ethernet.h>, although <netinet/if_ether.h> appears to work.)
#
# Before you is a C compiler.
#
AC_CHECK_FUNCS(ether_ntohost, [
    AC_CACHE_CHECK(for buggy ether_ntohost, ac_cv_buggy_ether_ntohost, [
	AC_TRY_RUN([
		#include <netdb.h>
		#include <sys/types.h>
		#include <sys/param.h>
		#include <sys/socket.h>

		int
		main(int argc, char **argv)
		{
			u_char ea[6] = { 0xff, 0xff, 0xff, 0xff, 0xff };
			char name[MAXHOSTNAMELEN];

			ether_ntohost(name, (struct ether_addr *)ea);
			exit(0);
		}
	], [ac_cv_buggy_ether_ntohost=no],
	   [ac_cv_buggy_ether_ntohost=yes],
	   [ac_cv_buggy_ether_ntohost="not while cross-compiling"])])
    if test "$ac_cv_buggy_ether_ntohost" = "no"; then
	AC_DEFINE(USE_ETHER_NTOHOST)
    fi
])
if test "$ac_cv_func_ether_ntohost" = yes -a \
    "$ac_cv_buggy_ether_ntohost" = "no"; then
	#
	# OK, we have ether_ntohost().  Do we have <netinet/if_ether.h>?
	#
	if test "$ac_cv_header_netinet_if_ether_h" = yes; then
		#
		# Yes.  Does it declare ether_ntohost()?
		#
		AC_CHECK_DECL(ether_ntohost,
		    [
			AC_DEFINE(NETINET_IF_ETHER_H_DECLARES_ETHER_NTOHOST,,
			    [Define to 1 if netinet/if_ether.h declares `ether_ntohost'])
		    ],,
		    [
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
struct mbuf;
struct rtentry;
#include <net/if.h>
#include <netinet/if_ether.h>
		    ])
	fi
	#
	# Did that succeed?
	#
	if test "$ac_cv_have_decl_ether_ntohost" != yes; then
		#
		# No, how about <netinet/ether.h>, as on Linux?
		#
		AC_CHECK_HEADERS(netinet/ether.h)
		if test "$ac_cv_header_netinet_ether_h" = yes; then
			#
			# We have it - does it declare ether_ntohost()?
			# Unset ac_cv_have_decl_ether_ntohost so we don't
			# treat the previous failure as a cached value and
			# suppress the next test.
			#
			unset ac_cv_have_decl_ether_ntohost
			AC_CHECK_DECL(ether_ntohost,
			    [
				AC_DEFINE(NETINET_ETHER_H_DECLARES_ETHER_NTOHOST,,
				    [Define to 1 if netinet/ether.h declares `ether_ntohost'])
			    ],,
			    [
#include <netinet/ether.h>
			    ])
		fi
	fi
	#
	# Is ether_ntohost() declared?
	#
	if test "$ac_cv_have_decl_ether_ntohost" != yes; then
		#
		# No, we'll have to declare it ourselves.
		# Do we have "struct ether_addr"?
		#
		AC_CHECK_TYPES(struct ether_addr,,,
		    [
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
struct mbuf;
struct rtentry;
#include <net/if.h>
#include <netinet/if_ether.h>
		    ])
		AC_DEFINE(HAVE_DECL_ETHER_NTOHOST, 0,
		    [Define to 1 if you have the declaration of `ether_ntohost', and to 0 if you
don't.])
	else
		AC_DEFINE(HAVE_DECL_ETHER_NTOHOST, 1,
		    [Define to 1 if you have the declaration of `ether_ntohost', and to 0 if you
don't.])
	fi
fi

dnl portability macros for getaddrinfo/getnameinfo
dnl
dnl Check for sa_len
AC_CHECK_SA_LEN(ac_cv_sockaddr_has_sa_len)
if test "$ac_cv_sockaddr_has_sa_len" = no; then
	missing_includes=yes
fi

AC_CHECK_FUNCS(pcap_findalldevs pcap_dump_flush pcap_lib_version)
if test $ac_cv_func_pcap_findalldevs = "yes" ; then
dnl Check for Mac OS X, which may ship pcap.h from 0.6 but libpcap may
dnl be 0.8; this means that lib has pcap_findalldevs but header doesn't
dnl have pcap_if_t.
    savedcflags="$CFLAGS"
    CFLAGS="$CFLAGS $V_INCLS"
    AC_CHECK_TYPES(pcap_if_t, , , [#include <pcap.h>])
    CFLAGS="$savedcflags"
fi

if test $ac_cv_func_pcap_lib_version = "no" ; then
    AC_MSG_CHECKING(whether pcap_version is defined by libpcap)
    AC_TRY_LINK([],
       [
	extern char pcap_version[];

	return (int)pcap_version;
       ],
       ac_lbl_cv_pcap_version_defined=yes,
       ac_lbl_cv_pcap_version_defined=no)
    if test "$ac_lbl_cv_pcap_version_defined" = yes ; then
    	AC_MSG_RESULT(yes)
	AC_DEFINE(HAVE_PCAP_VERSION)
    else
	AC_MSG_RESULT(no)
    fi
fi
AC_MSG_CHECKING(whether pcap_debug is defined by libpcap)
AC_TRY_LINK([],
   [
	extern int pcap_debug;

	return pcap_debug;
   ],
   ac_lbl_cv_pcap_debug_defined=yes,
   ac_lbl_cv_pcap_debug_defined=no)
if test "$ac_lbl_cv_pcap_debug_defined" = yes ; then
	AC_MSG_RESULT(yes)
	AC_DEFINE(HAVE_PCAP_DEBUG)
else
	AC_MSG_RESULT(no)
	#
	# OK, what about "yydebug"?
	#
	AC_MSG_CHECKING(whether yydebug is defined by libpcap)
	AC_TRY_LINK([],
	   [
		extern int yydebug;

		return yydebug;
	   ],
	   ac_lbl_cv_yydebug_defined=yes,
	   ac_lbl_cv_yydebug_defined=no)
	if test "$ac_lbl_cv_yydebug_defined" = yes ; then
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_YYDEBUG)
	else
		AC_MSG_RESULT(no)
	fi
fi
AC_REPLACE_FUNCS(bpf_dump)	dnl moved to libpcap in 0.6

V_GROUP=0
if test -f /etc/group -a ! -z "`grep '^wheel:' /etc/group`" ; then
	V_GROUP=wheel
fi
case "$host_os" in

aix*)
	dnl Workaround to enable certain features
	AC_DEFINE(_SUN)
	;;

irix*)
	V_GROUP=sys
	;;

osf*)
	V_GROUP=system
	;;

solaris*)
	V_GROUP=sys
	;;
esac

if test -f /dev/bpf -o -f /dev/bpf0; then
	V_GROUP=bpf
fi

AC_CHECK_HEADERS(sys/bitypes.h)

AC_CHECK_TYPE([int8_t], ,
	[AC_DEFINE([int8_t], [signed char],
	[Define to `signed char' if int8_t not defined.])])
AC_CHECK_TYPE([u_int8_t], ,
	[AC_DEFINE([u_int8_t], [unsigned char],
	[Define to `unsigned char' if u_int8_t not defined.])],
	[AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif])
AC_CHECK_TYPE([int16_t], ,
	[AC_DEFINE([int16_t], [short],
	[Define to `short' if int16_t not defined.])])
AC_CHECK_TYPE([u_int16_t], ,
	[AC_DEFINE([u_int16_t], [unsigned short],
	[Define to `unsigned short' if u_int16_t not defined.])],
	[AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif])
AC_CHECK_TYPE([int32_t], ,
	[AC_DEFINE([int32_t], [int],
	[Define to `int' if int32_t not defined.])])
AC_CHECK_TYPE([u_int32_t], ,
	[AC_DEFINE([u_int32_t], [unsigned int],
	[Define to `unsigned int' if u_int32_t not defined.])],
	[AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif])
AC_CHECK_TYPE([int64_t], ,
	[AC_DEFINE([int64_t], [long long],
	[Define to `long long' if int64_t not defined.])])
AC_CHECK_TYPE([u_int64_t], ,
	[AC_DEFINE([u_int64_t], [unsigned long long],
	[Define to `unsigned long long' if u_int64_t not defined.])],
	[AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif])

#
# We can't just check for <inttypes.h> - some systems have one that
# doesn't define all the PRI[doxu]64 macros.
#
AC_CHECK_HEADERS(inttypes.h,
  [
    #
    # OK, we have inttypes.h, but does it define those macros?
    #
    AC_MSG_CHECKING([[whether inttypes.h defines the PRI[doxu]64 macros]])
    AC_COMPILE_IFELSE(
      [
	AC_LANG_SOURCE(
	  [[
	    #include <inttypes.h>
	    #include <stdio.h>
	    #include <sys/types.h>
	    #ifdef HAVE_SYS_BITYPES_H
	    #include <sys/bitypes.h>
	    #endif

	    main()
	    {
	      printf("%" PRId64 "\n", (u_int64_t)1);
	      printf("%" PRIo64 "\n", (u_int64_t)1);
	      printf("%" PRIx64 "\n", (u_int64_t)1);
	      printf("%" PRIu64 "\n", (u_int64_t)1);
	    }
	  ]])
      ],
      [
	AC_MSG_RESULT(yes)
	ac_lbl_inttypes_h_defines_formats=yes
      ],
      [
	AC_MSG_RESULT(no)
	ac_lbl_inttypes_h_defines_formats=no
      ])
  ],
  [
    #
    # We don't have inttypes.h, so it obviously can't define those
    # macros.
    #
    ac_lbl_inttypes_h_defines_formats=no
  ])
if test "$ac_lbl_inttypes_h_defines_formats" = no; then
  AC_LBL_CHECK_64BIT_FORMAT(l,
    [
      AC_LBL_CHECK_64BIT_FORMAT(ll,
        [
          AC_LBL_CHECK_64BIT_FORMAT(L,
	    [
	      AC_LBL_CHECK_64BIT_FORMAT(q,
	        [
	          AC_MSG_ERROR([neither %llx nor %Lx nor %qx worked on a 64-bit integer])
	        ])
	    ])
	])
    ])
fi

AC_LBL_DEVEL(V_CCOPT)

AC_LBL_SOCKADDR_SA_LEN

AC_LBL_UNALIGNED_ACCESS

AC_VAR_H_ERRNO

AC_ARG_WITH(crypto, [  --without-crypto        disable crypto support],
	[], [
AC_MSG_CHECKING(for SSLeay)
ac_cv_ssleay_path=no
incdir=no

#
# If Xprefix is set in the environment, use that value.
# XXX - this should arguably be done by having --with-crypto take an
# optional argument, and have that argument be used to set Xprefix
# if present.
#
if test -z "$Xprefix"; then
	Xprefix=`eval echo $prefix`
fi

for dir in $Xprefix /usr/${host_alias} /usr /usr/local /usr/local/ssl /usr/pkg; do
	#
	# XXX - is there a better way to check if a given library is
	# in a given directory than checking each of the possible
	# shared library suffixes?
	#
	# Are there any other suffixes we need to look for?  Do we have to
	# worry about ".so.{version}"?
	#
	# Or should we just look for "libcrypto.*"?
	#
	if test -d $dir/lib -a \( -f $dir/lib/libcrypto.a -o \
			          -f $dir/lib/libcrypto.so -o \
			          -f $dir/lib/libcrypto.sl -o \
				  -f $dir/lib/libcrypto.dylib \); then
		ac_cv_ssleay_path=$dir
	fi
	if test -d $dir/include/openssl -a -f $dir/include/openssl/des.h; then
		incdir="-I$dir/include"
	fi
	if test "$ac_cv_ssleay_path" != "no" -a "$incdir" != "no"; then
		break;
	else
		ac_cv_ssleay_path=no
		incdir=no
	fi
done
AC_MSG_RESULT($ac_cv_ssleay_path)
if test "$ac_cv_ssleay_path" != no; then
	V_INCLS="$V_INCLS $incdir"
	LDFLAGS="-L$dir/lib $LDFLAGS"
	if test -f $ac_cv_ssleay_path/lib/libRSAglue.a; then
		LIBS="$LIBS -lRSAglue"
	fi
	if test -f $ac_cv_ssleay_path/lib/librsaref.a; then
		LIBS="$LIBS -lrsaref"
	fi
	AC_CHECK_LIB(crypto, DES_cbc_encrypt)

	CPPFLAGS="$CPPFLAGS $V_INCLS"
	AC_CHECK_HEADERS(openssl/evp.h)
fi
])

dnl
dnl set additional include path if necessary
if test "$missing_includes" = "yes"; then
	CPPFLAGS="$CPPFLAGS -I\$(srcdir)/missing"
	V_INCLS="$V_INCLS -I\$(srcdir)/missing"
fi

AC_SUBST(V_CCOPT)
AC_SUBST(V_DEFS)
AC_SUBST(V_GROUP)
AC_SUBST(V_INCLS)
AC_SUBST(V_PCAPDEP)
AC_SUBST(LOCALSRC)

AC_PROG_INSTALL

AC_CONFIG_HEADER(config.h)

AC_OUTPUT_COMMANDS([if test -f .devel; then
	echo timestamp > stamp-h
	cat Makefile-devel-adds >> Makefile
	make depend
fi])
AC_OUTPUT(Makefile)
exit 0