dnl @(#) $Header: /tcpdump/master/tcpdump/configure.in,v 1.145 2002/01/17 05:00:16 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: 1.145 $)
AC_PREREQ(2.13)
AC_INIT(tcpdump.c)

AC_CANONICAL_HOST

AC_LBL_C_INIT(V_CCOPT, V_INCLS)
AC_C_INLINE
AC_C___ATTRIBUTE__

AC_CHECK_HEADERS(fcntl.h rpc/rpcent.h netinet/if_ether.h)
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

CFLAGS="$CFLAGS -Dss_family=__ss_family -Dss_len=__ss_len"
AC_MSG_CHECKING([whether to enable ipv6])
AC_ARG_ENABLE(ipv6,
[  --enable-ipv6           enable ipv6 (with ipv4) support
  --disable-ipv6          disable ipv6 support],
[ case "$enableval" in
yes)   AC_MSG_RESULT(yes)
       LOCALSRC="print-ip6.c print-ip6opts.c print-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-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 $i in
		inria)
			dnl http://www.kame.net/
			AC_EGREP_CPP(yes, [dnl
#include <netinet/in.h>
#ifdef IPV6_INRIA_VERSION
yes
#endif],
				[ipv6type=$i;
				CFLAGS="-DINET6 $CFLAGS"])
			;;
		kame)
			dnl http://www.kame.net/
			AC_EGREP_CPP(yes, [dnl
#include <netinet/in.h>
#ifdef __KAME__
yes
#endif],
				[ipv6type=$i;
				ipv6lib=inet6;
				ipv6libdir=/usr/local/v6/lib;
				ipv6trylibc=yes;
				CFLAGS="-DINET6 $CFLAGS"])
			;;
		linux-glibc)
			dnl http://www.v6.linux.or.jp/
			AC_EGREP_CPP(yes, [dnl
#include <features.h>
#if defined(__GLIBC__) && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1
yes
#endif],
				[ipv6type=$i;
				CFLAGS="-DINET6 $CFLAGS"])
			;;
		linux-libinet6)
			dnl http://www.v6.linux.or.jp/
			if test -d /usr/inet6 -o -f /usr/include/netinet/ip6.h; then
				ipv6type=$i
				ipv6lib=inet6
				ipv6libdir=/usr/inet6/lib
				ipv6trylibc=yes;
				CFLAGS="-DINET6 -I/usr/inet6/include $CFLAGS"
			fi
			;;
		toshiba)
			AC_EGREP_CPP(yes, [dnl
#include <sys/param.h>
#ifdef _TOSHIBA_INET6
yes
#endif],
				[ipv6type=$i;
				ipv6lib=inet6;
				ipv6libdir=/usr/local/v6/lib;
				CFLAGS="-DINET6 $CFLAGS"])
			;;
		v6d)
			AC_EGREP_CPP(yes, [dnl
#include </usr/local/v6/include/sys/v6config.h>
#ifdef __V6D__
yes
#endif],
				[ipv6type=$i;
				ipv6lib=v6;
				ipv6libdir=/usr/local/v6/lib;
				CFLAGS="-I/usr/local/v6/include $CFLAGS"])
			;;
		zeta)
			AC_EGREP_CPP(yes, [dnl
#include <sys/param.h>
#ifdef _ZETA_MINAMI_INET6
yes
#endif],
				[ipv6type=$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
	AC_SEARCH_LIBS(getaddrinfo, socket, [dnl
	AC_MSG_CHECKING(getaddrinfo bug)
	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;
    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);
}
],
	AC_MSG_RESULT(good)
	buggygetaddrinfo=no,
	AC_MSG_RESULT(buggy)
	buggygetaddrinfo=yes,
	AC_MSG_RESULT(buggy)
	buggygetaddrinfo=yes)], [buggygetaddrinfo=yes])

	if test "$buggygetaddrinfo" = "yes"; then
		if test "$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 upgreade your system library to newest version'
			echo '         of GNU C library (aka glibc).'
		fi
	fi
	AC_REPLACE_FUNCS(getaddrinfo getnameinfo)
fi
dnl AC_TRY_COMPILE(inet_ntop inet_pton inet_aton)
AC_MSG_CHECKING(for inet_ntop)
AC_TRY_COMPILE([#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_REPLACE_FUNCS(inet_ntop)])
AC_MSG_CHECKING(for inet_pton)
AC_TRY_COMPILE([#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_REPLACE_FUNCS(inet_pton)])
AC_MSG_CHECKING(for inet_aton)
AC_TRY_COMPILE([#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_REPLACE_FUNCS(inet_aton)])

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

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)

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)

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_REPLACE_FUNCS(vfprintf strcasecmp strlcat strlcpy strdup)
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
])
AC_CHECK_FUNCS(setlinebuf)

needsnprintf=no
AC_CHECK_FUNCS(vsnprintf snprintf,,
	[needsnprintf=yes])
if test $needsnprintf = yes; then
	LIBOBJS="$LIBOBJS snprintf.o"
fi

AC_LBL_TYPE_SIGNAL

AC_CHECK_LIB(dnet, dnet_htoa)

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

dnl HP/UX may need -lnsl for getrpcbynumber.
AC_SEARCH_LIBS(getrpcbynumber, nsl)

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

AC_LBL_LIBPCAP(V_PCAPDEP, V_INCLS)

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/bpf0 ; then
	V_GROUP=bpf
fi

AC_LBL_CHECK_TYPE(u_int8_t, u_char)
AC_LBL_CHECK_TYPE(int16_t, short)
AC_LBL_CHECK_TYPE(u_int16_t, u_short)
AC_LBL_CHECK_TYPE(int32_t, int)
AC_LBL_CHECK_TYPE(u_int32_t, u_int)

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
for dir in /usr /usr/local /usr/local/ssl /usr/pkg; do
	if test -d $dir/lib -a -f $dir/lib/libcrypto.a; then
		ac_cv_ssleay_path=$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)

	bak_CPPFLAGS=$CPPFLAGS
	CPPFLAGS="$CPPFLAGS $V_INCLS"
	AC_CHECK_HEADERS(cast.h)

	if test "$ac_cv_header_cast_h" = "yes"; then
		AC_MSG_CHECKING(for buggy CAST128)
		AC_TRY_RUN(dnl
[
#include <cast.h>
main()
{
	unsigned char key[] = {0x01,0x23,0x45,0x67,0x12};
	unsigned char in[] = {0x01,0x23,0x45,0x67,0x89,0xAB,0xCD,0xEF};
	unsigned char out[sizeof(in)];
	unsigned char ok[] = {0x7A,0xC8,0x16,0xD1,0x6E,0x9B,0x30,0x2E};
	CAST_KEY ks;
	CAST_set_key(&ks, sizeof(key), key);
	CAST_ecb_encrypt(in, out, &ks, CAST_ENCRYPT);
	if (memcmp(out, ok, sizeof(ok)) != 0)
		return 0;
	else
		return 1;
}],
			[buggy_cast128=yes],
			[buggy_cast128=no],
			[buggy_cast128="cross-compiling, assume yes"])
		AC_MSG_RESULT($buggy_cast128)
		if test "$buggy_cast128" != no; then
			echo "NOTE: SSLeay 0.9.0b has a bug in CAST128 en/decoding routine."
			echo "disabling CAST128 support."
			AC_DEFINE(HAVE_BUGGY_CAST128)
		fi
	fi

	CPPFLAGS=$bak_CPPFLAGS
fi
])
AC_CHECK_HEADERS(rc5.h)

AC_SUBST(V_CCOPT)
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