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