The Tcpdump Group git mirrors - tcpdump/blob - configure.ac

   1 dnl Copyright (c) 1994, 1995, 1996, 1997
   2 dnl     The Regents of the University of California.  All rights reserved.
   3 dnl
   4 dnl Process this file with autoconf to produce a configure script.
   5 dnl
   6
   7 #
   8 # See
   9 #
  10 #       http://ftp.gnu.org/gnu/config/README
  11 #
  12 # for the URLs to use to fetch new versions of config.guess and
  13 # config.sub.
  14 #
  15
  16 AC_PREREQ(2.64)
  17 AC_INIT(tcpdump, m4_esyscmd_s([cat VERSION]))
  18 AC_CONFIG_SRCDIR(tcpdump.c)
  19
  20 AC_CANONICAL_HOST
  21
  22 AC_LBL_C_INIT_BEFORE_CC(V_INCLS)
  23 AC_PROG_CC_C99
  24 AC_LBL_C_INIT(V_CCOPT, V_INCLS)
  25 AC_LBL_C_INLINE
  26
  27 AC_CHECK_HEADERS(fcntl.h rpc/rpc.h rpc/rpcent.h net/if.h)
  28 AC_CHECK_HEADERS(net/pfvar.h, , , [#include <sys/types.h>
  29 #include <sys/socket.h>
  30 #include <net/if.h>])
  31 if test "$ac_cv_header_net_pfvar_h" = yes; then
  32         AC_CHECK_HEADERS(net/if_pflog.h, , , [#include <sys/types.h>
  33         #include <sys/socket.h>
  34         #include <net/if.h>
  35         #include <net/pfvar.h>])
  36         if test "$ac_cv_header_net_if_pflog_h" = yes; then
  37                 LOCALSRC="print-pflog.c $LOCALSRC"
  38         fi
  39 fi
  40
  41 case "$host_os" in
  42
  43 darwin*)
  44         AC_ARG_ENABLE(universal,
  45         AC_HELP_STRING([--disable-universal],[don't build universal on macOS]))
  46         if test "$enable_universal" != "no"; then
  47                 case "$host_os" in
  48
  49                 darwin9.*)
  50                         #
  51                         # Leopard.  Build for x86 and 32-bit PowerPC, with
  52                         # x86 first.  (That's what Apple does.)
  53                         #
  54                         V_CCOPT="$V_CCOPT -arch i386 -arch ppc"
  55                         LDFLAGS="$LDFLAGS -arch i386 -arch ppc"
  56                         ;;
  57
  58                 darwin10.*)
  59                         #
  60                         # Snow Leopard.  Build for x86-64 and x86, with
  61                         # x86-64 first.  (That's what Apple does.)
  62                         #
  63                         V_CCOPT="$V_CCOPT -arch x86_64 -arch i386"
  64                         LDFLAGS="$LDFLAGS -arch x86_64 -arch i386"
  65                         ;;
  66                 esac
  67         fi
  68         ;;
  69 esac
  70
  71
  72 AC_ARG_WITH(smi,
  73 [  --with-smi              link with libsmi (allows to load MIBs on the fly to decode SNMP packets. [default=yes]
  74   --without-smi           don't link with libsmi],,
  75    with_smi=yes)
  76
  77 if test "x$with_smi" != "xno" ; then
  78         AC_CHECK_HEADER(smi.h,
  79         [
  80                 #
  81                 # OK, we found smi.h.  Do we have libsmi with smiInit?
  82                 #
  83                 AC_CHECK_LIB(smi, smiInit,
  84                 [
  85                         #
  86                         # OK, we have libsmi with smiInit.  Can we use it?
  87                         #
  88                         AC_MSG_CHECKING([whether to enable libsmi])
  89                         savedlibs="$LIBS"
  90                         LIBS="-lsmi $LIBS"
  91                         AC_TRY_RUN(
  92                                 [
  93 /* libsmi available check */
  94 #include <smi.h>
  95 main()
  96 {
  97   int current, revision, age, n;
  98   const int required = 2;
  99   if (smiInit(""))
 100     exit(1);
 101   if (strcmp(SMI_LIBRARY_VERSION, smi_library_version))
 102     exit(2);
 103   n = sscanf(smi_library_version, "%d:%d:%d", &current, &revision, &age);
 104   if (n != 3)
 105     exit(3);
 106   if (required < current - age || required > current)
 107     exit(4);
 108   exit(0);
 109 }
 110                                 ],
 111                                 [
 112                                         AC_MSG_RESULT(yes)
 113                                         AC_DEFINE(USE_LIBSMI, 1,
 114                                             [Define if you enable support for libsmi])
 115                                 ],
 116                                 [
 117                                         dnl autoconf documentation says that
 118                                         dnl $? contains the exit value.
 119                                         dnl reality is that it does not.
 120                                         dnl We leave this in just in case
 121                                         dnl autoconf ever comes back to
 122                                         dnl match the documentation.
 123                                         case $? in
 124                                           1) AC_MSG_RESULT(no - smiInit failed) ;;
 125                                           2) AC_MSG_RESULT(no - header/library version mismatch) ;;
 126                                           3) AC_MSG_RESULT(no - can't determine library version) ;;
 127                                           4) AC_MSG_RESULT(no - too old) ;;
 128                                           *) AC_MSG_RESULT(no) ;;
 129                                         esac
 130                                         LIBS="$savedlibs"
 131                                 ],
 132                                 [
 133                                         AC_MSG_RESULT(not when cross-compiling)
 134                                         LIBS="$savedlibs"
 135                                 ]
 136                         )
 137                 ])
 138         ])
 139 fi
 140
 141 AC_MSG_CHECKING([whether to enable the possibly-buggy SMB printer])
 142 AC_ARG_ENABLE(smb,
 143 [  --enable-smb            enable possibly-buggy SMB printer [default=yes]
 144   --disable-smb           disable possibly-buggy SMB printer],,
 145    enableval=yes)
 146 case "$enableval" in
 147 yes)    AC_MSG_RESULT(yes)
 148         AC_WARN([The SMB printer may have exploitable buffer overflows!!!])
 149         AC_DEFINE(ENABLE_SMB, 1,
 150             [define if you want to build the possibly-buggy SMB printer])
 151         LOCALSRC="print-smb.c smbutil.c $LOCALSRC"
 152         ;;
 153 *)      AC_MSG_RESULT(no)
 154         ;;
 155 esac
 156
 157 AC_ARG_WITH(user, [  --with-user=USERNAME    drop privileges by default to USERNAME])
 158 AC_MSG_CHECKING([whether to drop root privileges by default])
 159 if test ! -z "$with_user" ; then
 160        AC_DEFINE_UNQUOTED(WITH_USER, "$withval",
 161            [define if should drop privileges by default])
 162        AC_MSG_RESULT(to \"$withval\")
 163 else
 164        AC_MSG_RESULT(no)
 165 fi
 166
 167 AC_ARG_WITH(chroot, [  --with-chroot=DIRECTORY when dropping privileges, chroot to DIRECTORY])
 168 AC_MSG_CHECKING([whether to chroot])
 169 if test ! -z "$with_chroot" && test "$with_chroot" != "no" ; then
 170        AC_DEFINE_UNQUOTED(WITH_CHROOT, "$withval",
 171            [define if should chroot when dropping privileges])
 172        AC_MSG_RESULT(to \"$withval\")
 173 else
 174        AC_MSG_RESULT(no)
 175 fi
 176
 177 AC_ARG_WITH(sandbox-capsicum,
 178         AS_HELP_STRING([--with-sandbox-capsicum],
 179                        [use Capsicum security functions @<:@default=yes, if available@:>@]))
 180 #
 181 # Check whether various functions are available.  If any are, set
 182 # ac_lbl_capsicum_function_seen to yes; if any are not, set
 183 # ac_lbl_capsicum_function_not_seen to yes.
 184 #
 185 # We don't check cap_rights_init(), as it's a macro, wrapping another
 186 # function, in at least some versions of FreeBSD, and AC_CHECK_FUNCS()
 187 # doesn't handle that.
 188 #
 189 # All of the ones we check for must be available in order to enable
 190 # capsicum sandboxing.
 191 #
 192 # XXX - do we need to check for all of them, or are there some that, if
 193 # present, imply others are present?
 194 #
 195 if test ! -z "$with_sandbox-capsicum" && test "$with_sandbox-capsicum" != "no" ; then
 196         AC_CHECK_FUNCS(cap_enter cap_rights_limit cap_ioctls_limit openat,
 197             ac_lbl_capsicum_function_seen=yes,
 198             ac_lbl_capsicum_function_not_seen=yes)
 199         AC_CHECK_LIB(casper, cap_init, LIBS="$LIBS -lcasper")
 200         AC_CHECK_LIB(cap_dns, cap_gethostbyaddr, LIBS="$LIBS -lcap_dns")
 201 fi
 202 AC_MSG_CHECKING([whether to sandbox using capsicum])
 203 if test "x$ac_lbl_capsicum_function_seen" = "xyes" -a "x$ac_lbl_capsicum_function_not_seen" != "xyes"; then
 204         AC_DEFINE(HAVE_CAPSICUM, 1, [capsicum support available])
 205         AC_MSG_RESULT(yes)
 206 else
 207         AC_MSG_RESULT(no)
 208 fi
 209 AC_MSG_CHECKING([whether to sandbox using Casper library])
 210 if test "x$ac_cv_lib_casper_cap_init" = "xyes" -a "x$ac_cv_lib_cap_dns_cap_gethostbyaddr" = "xyes"; then
 211         AC_DEFINE(HAVE_CASPER, 1, [Casper support available])
 212         AC_MSG_RESULT(yes)
 213 else
 214         AC_MSG_RESULT(no)
 215 fi
 216
 217 #
 218 # We must check this before checking whether to check the OS's IPv6,
 219 # support because, on some platforms (such as SunOS 5.x), the test
 220 # program requires the extra networking libraries.
 221 #
 222 AC_LBL_LIBRARY_NET
 223
 224 #
 225 # Check whether AF_INET6 and struct in6_addr are defined.
 226 # If they aren't both defined, we don't have sufficient OS
 227 # support for IPv6, so we don't look for IPv6 support libraries,
 228 # and we define AF_INET6 and struct in6_addr ourselves.
 229 #
 230 AC_MSG_CHECKING([whether the operating system supports IPv6])
 231 AC_COMPILE_IFELSE(
 232     [
 233       AC_LANG_SOURCE(
 234         [[
 235 /* AF_INET6 available check */
 236 #include <sys/types.h>
 237 #ifdef _WIN32
 238 #include <ws2tcpip.h>
 239 #else
 240 #include <sys/socket.h>
 241 #include <netinet/in.h>
 242 #endif
 243 #ifdef AF_INET6
 244 void
 245 foo(struct in6_addr *addr)
 246 {
 247  memset(addr, 0, sizeof (struct in6_addr));
 248 }
 249 #else
 250 #error "AF_INET6 not defined"
 251 #endif
 252         ]])
 253     ],
 254     [
 255         AC_MSG_RESULT(yes)
 256         AC_DEFINE(HAVE_OS_IPV6_SUPPORT, 1,
 257             [define if the OS provides AF_INET6 and struct in6_addr])
 258         ipv6=yes
 259     ],
 260     [
 261         AC_MSG_RESULT(no)
 262         ipv6=no
 263     ]
 264 )
 265
 266 ipv6type=unknown
 267 ipv6lib=none
 268 ipv6trylibc=no
 269
 270 if test "$ipv6" = "yes"; then
 271         AC_MSG_CHECKING([ipv6 stack type])
 272         for i in inria kame linux-glibc linux-libinet6 toshiba v6d zeta; do
 273                 case $i in
 274                 inria)
 275                         dnl http://www.kame.net/
 276                         AC_EGREP_CPP(yes,
 277 [#include <netinet/in.h>
 278 #ifdef IPV6_INRIA_VERSION
 279 yes
 280 #endif],
 281                                 [ipv6type=$i])
 282                         ;;
 283                 kame)
 284                         dnl http://www.kame.net/
 285                         AC_EGREP_CPP(yes,
 286 [#include <netinet/in.h>
 287 #ifdef __KAME__
 288 yes
 289 #endif],
 290                                 [ipv6type=$i;
 291                                 ipv6lib=inet6;
 292                                 ipv6libdir=/usr/local/v6/lib;
 293                                 ipv6trylibc=yes])
 294                         ;;
 295                 linux-glibc)
 296                         dnl http://www.v6.linux.or.jp/
 297                         AC_EGREP_CPP(yes,
 298 [#include <features.h>
 299 #if defined(__GLIBC__) && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1
 300 yes
 301 #endif],
 302                                 [ipv6type=$i])
 303                         ;;
 304                 linux-libinet6)
 305                         dnl http://www.v6.linux.or.jp/
 306                         dnl
 307                         dnl This also matches Solaris 8 and Tru64 UNIX 5.1,
 308                         dnl and possibly other versions of those OSes
 309                         dnl
 310                         if test -d /usr/inet6 -o -f /usr/include/netinet/ip6.h; then
 311                                 ipv6type=$i
 312                                 ipv6lib=inet6
 313                                 ipv6libdir=/usr/inet6/lib
 314                                 ipv6trylibc=yes;
 315                                 CFLAGS="-I/usr/inet6/include $CFLAGS"
 316                         fi
 317                         ;;
 318                 toshiba)
 319                         AC_EGREP_CPP(yes,
 320 [#include <sys/param.h>
 321 #ifdef _TOSHIBA_INET6
 322 yes
 323 #endif],
 324                                 [ipv6type=$i;
 325                                 ipv6lib=inet6;
 326                                 ipv6libdir=/usr/local/v6/lib])
 327                         ;;
 328                 v6d)
 329                         AC_EGREP_CPP(yes,
 330 [#include </usr/local/v6/include/sys/v6config.h>
 331 #ifdef __V6D__
 332 yes
 333 #endif],
 334                                 [ipv6type=$i;
 335                                 ipv6lib=v6;
 336                                 ipv6libdir=/usr/local/v6/lib;
 337                                 CFLAGS="-I/usr/local/v6/include $CFLAGS"])
 338                         ;;
 339                 zeta)
 340                         AC_EGREP_CPP(yes,
 341 [#include <sys/param.h>
 342 #ifdef _ZETA_MINAMI_INET6
 343 yes
 344 #endif],
 345                                 [ipv6type=$i;
 346                                 ipv6lib=inet6;
 347                                 ipv6libdir=/usr/local/v6/lib])
 348                         ;;
 349                 esac
 350                 if test "$ipv6type" != "unknown"; then
 351                         break
 352                 fi
 353         done
 354         AC_MSG_RESULT($ipv6type)
 355 fi
 356
 357 if test "$ipv6" = "yes" -a "$ipv6lib" != "none"; then
 358         if test -d $ipv6libdir -a -f $ipv6libdir/lib$ipv6lib.a; then
 359                 LIBS="-L$ipv6libdir -l$ipv6lib $LIBS"
 360                 echo "You have $ipv6lib library, using it"
 361         else
 362                 if test "$ipv6trylibc" = "yes"; then
 363                         echo "You do not have $ipv6lib library, using libc"
 364                 else
 365                         echo 'Fatal: no $ipv6lib library found.  cannot continue.'
 366                         echo "You need to fetch lib$ipv6lib.a from appropriate"
 367                         echo 'ipv6 kit and compile beforehand.'
 368                         exit 1
 369                 fi
 370         fi
 371 fi
 372
 373 AC_SEARCH_LIBS(dnet_htoa, dnet,
 374 [
 375         AC_DEFINE(HAVE_DNET_HTOA, 1,
 376             [define if you have the dnet_htoa function])
 377         #
 378         # OK, we have dnet_htoa().  Do we have netdnet/dnetdb.h?
 379         #
 380         AC_CHECK_HEADERS(netdnet/dnetdb.h)
 381         if test "$ac_cv_header_netdnet_dnetdb_h" = "yes"; then
 382                 #
 383                 # Yes.  Does it declare dnet_htoa()?
 384                 #
 385                 AC_CHECK_DECL(dnet_htoa,
 386                 [
 387                         # Yes.
 388                         AC_DEFINE(NETDNET_DNETDB_H_DECLARES_DNET_HTOA,,
 389                             [Define to 1 if netenet/dnetdb.h declares `dnet_htoa'])
 390                 ],,
 391                 [
 392 AC_INCLUDES_DEFAULT
 393 #include <netdnet/dnetdb.h>
 394                 ])
 395         fi
 396
 397         #
 398         # Do we have netdnet/dn.h?
 399         #
 400         AC_CHECK_HEADERS(netdnet/dn.h)
 401         if test "$ac_cv_header_netdnet_dn_h" = "yes"; then
 402                 #
 403                 # Yes.  Does it declare struct dn_naddr?
 404                 #
 405                 AC_CHECK_TYPES(struct dn_naddr,,,
 406                 [
 407 #include <netdnet/dn.h>
 408                 ])
 409         fi
 410 ])
 411
 412 AC_REPLACE_FUNCS(strlcat strlcpy strdup strsep getservent getopt_long pcap_dump_ftell)
 413 AC_CHECK_FUNCS(fork vfork strftime)
 414 AC_CHECK_FUNCS(setlinebuf)
 415
 416 needsnprintf=no
 417 AC_CHECK_FUNCS(vsnprintf snprintf,,
 418         [needsnprintf=yes])
 419 if test $needsnprintf = yes; then
 420         AC_LIBOBJ(snprintf)
 421 fi
 422
 423 AC_CHECK_LIB(rpc, main)         dnl It's unclear why we might need -lrpc
 424
 425 dnl Some platforms may need -lnsl for getrpcbynumber.
 426 AC_SEARCH_LIBS(getrpcbynumber, nsl,
 427     AC_DEFINE(HAVE_GETRPCBYNUMBER, 1, [define if you have getrpcbynumber()]))
 428
 429 AC_LBL_LIBPCAP(V_PCAPDEP, V_INCLS)
 430
 431 #
 432 # Check for these after AC_LBL_LIBPCAP, so we link with the appropriate
 433 # libraries (e.g., "-lsocket -lnsl" on Solaris).
 434 #
 435 # You are in a twisty little maze of UN*Xes, all different.
 436 # Some might not have ether_ntohost().
 437 # Some might have it and declare it in <net/ethernet.h>.
 438 # Some might have it and declare it in <netinet/ether.h>
 439 # Some might have it and declare it in <sys/ethernet.h>.
 440 # Some might have it and declare it in <arpa/inet.h>.
 441 # Some might have it and declare it in <netinet/if_ether.h>.
 442 # Some might have it and not declare it in any header file.
 443 #
 444 # Before you is a C compiler.
 445 #
 446 AC_CHECK_FUNCS(ether_ntohost, [
 447     AC_CACHE_CHECK(for buggy ether_ntohost, ac_cv_buggy_ether_ntohost, [
 448         AC_TRY_RUN([
 449                 #include <netdb.h>
 450                 #include <sys/types.h>
 451                 #include <sys/param.h>
 452                 #include <sys/socket.h>
 453
 454                 int
 455                 main(int argc, char **argv)
 456                 {
 457                         u_char ea[6] = { 0xff, 0xff, 0xff, 0xff, 0xff };
 458                         char name[MAXHOSTNAMELEN];
 459
 460                         ether_ntohost(name, (struct ether_addr *)ea);
 461                         exit(0);
 462                 }
 463         ], [ac_cv_buggy_ether_ntohost=no],
 464            [ac_cv_buggy_ether_ntohost=yes],
 465            [ac_cv_buggy_ether_ntohost="not while cross-compiling"])])
 466     if test "$ac_cv_buggy_ether_ntohost" = "no"; then
 467         AC_DEFINE(USE_ETHER_NTOHOST, 1,
 468             [define if you have ether_ntohost() and it works])
 469     fi
 470 ])
 471 if test "$ac_cv_func_ether_ntohost" = yes -a \
 472     "$ac_cv_buggy_ether_ntohost" = "no"; then
 473         #
 474         # OK, we have ether_ntohost().  Is it declared in <net/ethernet.h>?
 475         #
 476         # This test fails if we don't have <net/ethernet.h> or if we do
 477         # but it doesn't declare ether_ntohost().
 478         #
 479         AC_CHECK_DECL(ether_ntohost,
 480             [
 481                 AC_DEFINE(NET_ETHERNET_H_DECLARES_ETHER_NTOHOST,,
 482                     [Define to 1 if net/ethernet.h declares `ether_ntohost'])
 483             ],,
 484             [
 485 #include <net/ethernet.h>
 486             ])
 487         #
 488         # Did that succeed?
 489         #
 490         if test "$ac_cv_have_decl_ether_ntohost" != yes; then
 491                 #
 492                 # No, how about <netinet/ether.h>, as on Linux?
 493                 #
 494                 # This test fails if we don't have <netinet/ether.h>
 495                 # or if we do but it doesn't declare ether_ntohost().
 496                 #
 497                 # Unset ac_cv_have_decl_ether_ntohost so we don't
 498                 # treat the previous failure as a cached value and
 499                 # suppress the next test.
 500                 #
 501                 unset ac_cv_have_decl_ether_ntohost
 502                 AC_CHECK_DECL(ether_ntohost,
 503                     [
 504                         AC_DEFINE(NETINET_ETHER_H_DECLARES_ETHER_NTOHOST,,
 505                             [Define to 1 if netinet/ether.h declares `ether_ntohost'])
 506                     ],,
 507                     [
 508 #include <netinet/ether.h>
 509                     ])
 510         fi
 511         #
 512         # Did that succeed?
 513         #
 514         if test "$ac_cv_have_decl_ether_ntohost" != yes; then
 515                 #
 516                 # No, how about <sys/ethernet.h>, as on Solaris 10
 517                 # and later?
 518                 #
 519                 # This test fails if we don't have <sys/ethernet.h>
 520                 # or if we do but it doesn't declare ether_ntohost().
 521                 #
 522                 # Unset ac_cv_have_decl_ether_ntohost so we don't
 523                 # treat the previous failure as a cached value and
 524                 # suppress the next test.
 525                 #
 526                 unset ac_cv_have_decl_ether_ntohost
 527                 AC_CHECK_DECL(ether_ntohost,
 528                     [
 529                         AC_DEFINE(SYS_ETHERNET_H_DECLARES_ETHER_NTOHOST,,
 530                             [Define to 1 if sys/ethernet.h declares `ether_ntohost'])
 531                     ],,
 532                     [
 533 #include <sys/ethernet.h>
 534                     ])
 535         fi
 536         #
 537         # Did that succeed?
 538         #
 539         if test "$ac_cv_have_decl_ether_ntohost" != yes; then
 540                 #
 541                 # No, how about <arpa/inet.h>, as in AIX?
 542                 #
 543                 # This test fails if we don't have <arpa/inet.h>
 544                 # (if we have ether_ntohost(), we should have
 545                 # networking, and if we have networking, we should
 546                 # have <arapa/inet.h>) or if we do but it doesn't
 547                 # declare ether_ntohost().
 548                 #
 549                 # Unset ac_cv_have_decl_ether_ntohost so we don't
 550                 # treat the previous failure as a cached value and
 551                 # suppress the next test.
 552                 #
 553                 unset ac_cv_have_decl_ether_ntohost
 554                 AC_CHECK_DECL(ether_ntohost,
 555                     [
 556                         AC_DEFINE(ARPA_INET_H_DECLARES_ETHER_NTOHOST,,
 557                             [Define to 1 if arpa/inet.h declares `ether_ntohost'])
 558                     ],,
 559                     [
 560 #include <arpa/inet.h>
 561                     ])
 562         fi
 563         #
 564         # Did that succeed?
 565         #
 566         if test "$ac_cv_have_decl_ether_ntohost" != yes; then
 567                 #
 568                 # No, how about <netinet/if_ether.h>?
 569                 # On some platforms, it requires <net/if.h> and
 570                 # <netinet/in.h>, and we always include it with
 571                 # both of them, so test it with both of them.
 572                 #
 573                 # This test fails if we don't have <netinet/if_ether.h>
 574                 # and the headers we include before it, or if we do but
 575                 # <netinet/if_ether.h> doesn't declare ether_hostton().
 576                 #
 577                 # Unset ac_cv_have_decl_ether_ntohost so we don't
 578                 # treat the previous failure as a cached value and
 579                 # suppress the next test.
 580                 #
 581                 unset ac_cv_have_decl_ether_ntohost
 582                 AC_CHECK_DECL(ether_ntohost,
 583                     [
 584                         AC_DEFINE(NETINET_IF_ETHER_H_DECLARES_ETHER_NTOHOST,,
 585                             [Define to 1 if netinet/if_ether.h declares `ether_ntohost'])
 586                     ],,
 587                     [
 588 #include <sys/types.h>
 589 #include <sys/socket.h>
 590 #include <net/if.h>
 591 #include <netinet/in.h>
 592 #include <netinet/if_ether.h>
 593                     ])
 594         fi
 595         #
 596         # After all that, is ether_ntohost() declared?
 597         #
 598         if test "$ac_cv_have_decl_ether_ntohost" = yes; then
 599                 #
 600                 # Yes.
 601                 #
 602                 AC_DEFINE(HAVE_DECL_ETHER_NTOHOST, 1,
 603                     [Define to 1 if you have the declaration of `ether_ntohost'])
 604         else
 605                 #
 606                 # No, we'll have to declare it ourselves.
 607                 # Do we have "struct ether_addr" if we include
 608                 # <netinet/if_ether.h>?
 609                 #
 610                 AC_CHECK_TYPES(struct ether_addr,,,
 611                     [
 612                         #include <sys/types.h>
 613                         #include <sys/socket.h>
 614                         #include <net/if.h>
 615                         #include <netinet/in.h>
 616                         #include <netinet/if_ether.h>
 617                     ])
 618         fi
 619 fi
 620
 621 dnl
 622 dnl Check for "pcap_list_datalinks()" and use a substitute version if
 623 dnl it's not present.  If it is present, check for "pcap_free_datalinks()";
 624 dnl if it's not present, we don't replace it for now.  (We could do so
 625 dnl on UN*X, but not on Windows, where hilarity ensues if a program
 626 dnl built with one version of the MSVC support library tries to free
 627 dnl something allocated by a library built with another version of
 628 dnl the MSVC support library.)
 629 dnl
 630 AC_CHECK_FUNC(pcap_list_datalinks,
 631         [
 632             AC_DEFINE(HAVE_PCAP_LIST_DATALINKS, 1,
 633                 [define if libpcap has pcap_list_datalinks()])
 634             AC_CHECK_FUNCS(pcap_free_datalinks)
 635         ],
 636         [
 637             AC_LIBOBJ(datalinks)
 638         ])
 639
 640 dnl
 641 dnl Check for "pcap_datalink_name_to_val()", and use a substitute
 642 dnl version if it's not present.  If it is present, check for
 643 dnl "pcap_datalink_val_to_description()", and if we don't have it,
 644 dnl use a substitute version.
 645 dnl
 646 AC_CHECK_FUNC(pcap_datalink_name_to_val,
 647         [
 648             AC_DEFINE(HAVE_PCAP_DATALINK_NAME_TO_VAL, 1,
 649                 [define if libpcap has pcap_datalink_name_to_val()])
 650             AC_CHECK_FUNC(pcap_datalink_val_to_description,
 651                 AC_DEFINE(HAVE_PCAP_DATALINK_VAL_TO_DESCRIPTION, 1,
 652                     [define if libpcap has pcap_datalink_val_to_description()]),
 653                 [
 654                     AC_LIBOBJ(dlnames)
 655                 ])
 656         ],
 657         [
 658             AC_LIBOBJ(dlnames)
 659         ])
 660
 661 dnl
 662 dnl Check for "pcap_set_datalink()"; you can't substitute for it if
 663 dnl it's absent (it has hooks into libpcap), so just define the
 664 dnl HAVE_ value if it's there.
 665 dnl
 666 AC_CHECK_FUNCS(pcap_set_datalink)
 667
 668 dnl
 669 dnl Check for "pcap_breakloop()"; you can't substitute for it if
 670 dnl it's absent (it has hooks into the live capture routines),
 671 dnl so just define the HAVE_ value if it's there.
 672 dnl
 673 AC_CHECK_FUNCS(pcap_breakloop)
 674
 675 #
 676 # Do we have the new open API?  Check for pcap_create, and assume that,
 677 # if we do, we also have pcap_activate() and the other new routines
 678 # introduced in libpcap 1.0.0.
 679 #
 680 AC_CHECK_FUNCS(pcap_create)
 681 if test $ac_cv_func_pcap_create = "yes" ; then
 682         #
 683         # OK, do we have pcap_set_tstamp_type?  If so, assume we have
 684         # pcap_list_tstamp_types and pcap_free_tstamp_types as well.
 685         #
 686         AC_CHECK_FUNCS(pcap_set_tstamp_type)
 687         #
 688         # And do we have pcap_set_tstamp_precision?  If so, we assume
 689         # we also have pcap_open_offline_with_tstamp_precision.
 690         #
 691         AC_CHECK_FUNCS(pcap_set_tstamp_precision)
 692 fi
 693
 694 #
 695 # Check for a miscellaneous collection of functions which we use
 696 # if we have them.
 697 #
 698 AC_CHECK_FUNCS(pcap_findalldevs)
 699 if test $ac_cv_func_pcap_findalldevs = "yes" ; then
 700 dnl Check for libpcap having pcap_findalldevs() but the pcap.h header
 701 dnl not having pcap_if_t; some versions of Mac OS X shipped with pcap.h
 702 dnl from 0.6 and libpcap 0.8, so that libpcap had pcap_findalldevs but
 703 dnl pcap.h didn't have pcap_if_t.
 704     savedcppflags="$CPPFLAGS"
 705     CPPFLAGS="$CPPFLAGS $V_INCLS"
 706     AC_CHECK_TYPES(pcap_if_t, , , [#include <pcap.h>])
 707     CPPFLAGS="$savedcppflags"
 708 fi
 709 AC_CHECK_FUNCS(pcap_dump_flush pcap_lib_version)
 710 if test $ac_cv_func_pcap_lib_version = "no" ; then
 711     AC_MSG_CHECKING(whether pcap_version is defined by libpcap)
 712     AC_TRY_LINK([],
 713        [
 714         extern char pcap_version[];
 715
 716         return (int)pcap_version;
 717        ],
 718        ac_lbl_cv_pcap_version_defined=yes,
 719        ac_lbl_cv_pcap_version_defined=no)
 720     if test "$ac_lbl_cv_pcap_version_defined" = yes ; then
 721         AC_MSG_RESULT(yes)
 722         AC_DEFINE(HAVE_PCAP_VERSION, 1, [define if libpcap has pcap_version])
 723     else
 724         AC_MSG_RESULT(no)
 725     fi
 726 fi
 727 AC_CHECK_FUNCS(pcap_setdirection pcap_set_immediate_mode pcap_dump_ftell64)
 728 AC_CHECK_FUNCS(pcap_open pcap_findalldevs_ex)
 729
 730 #
 731 # Check for special debugging functions
 732 #
 733 AC_CHECK_FUNCS(pcap_set_parser_debug)
 734 if test "$ac_cv_func_pcap_set_parser_debug" = "no" ; then
 735         #
 736         # OK, we don't have pcap_set_parser_debug() to set the libpcap
 737         # filter expression parser debug flag; can we directly set the
 738         # flag?
 739         AC_MSG_CHECKING(whether pcap_debug is defined by libpcap)
 740         AC_TRY_LINK([],
 741            [
 742                 extern int pcap_debug;
 743
 744                 return pcap_debug;
 745            ],
 746            ac_lbl_cv_pcap_debug_defined=yes,
 747            ac_lbl_cv_pcap_debug_defined=no)
 748         if test "$ac_lbl_cv_pcap_debug_defined" = yes ; then
 749                 AC_MSG_RESULT(yes)
 750                 AC_DEFINE(HAVE_PCAP_DEBUG, 1, [define if libpcap has pcap_debug])
 751         else
 752                 AC_MSG_RESULT(no)
 753                 #
 754                 # OK, what about "yydebug"?
 755                 #
 756                 AC_MSG_CHECKING(whether yydebug is defined by libpcap)
 757                 AC_TRY_LINK([],
 758                    [
 759                         extern int yydebug;
 760
 761                         return yydebug;
 762                    ],
 763                    ac_lbl_cv_yydebug_defined=yes,
 764                    ac_lbl_cv_yydebug_defined=no)
 765                 if test "$ac_lbl_cv_yydebug_defined" = yes ; then
 766                         AC_MSG_RESULT(yes)
 767                         AC_DEFINE(HAVE_YYDEBUG, 1, [define if libpcap has yydebug])
 768                 else
 769                         AC_MSG_RESULT(no)
 770                 fi
 771         fi
 772 fi
 773 AC_CHECK_FUNCS(pcap_set_optimizer_debug)
 774 AC_REPLACE_FUNCS(bpf_dump)      dnl moved to libpcap in 0.6
 775
 776 V_GROUP=0
 777 if test -f /etc/group -a ! -z "`grep '^wheel:' /etc/group`" ; then
 778         V_GROUP=wheel
 779 fi
 780 #
 781 # Assume V7/BSD convention for man pages (file formats in section 5,
 782 # miscellaneous info in section 7).
 783 #
 784 MAN_FILE_FORMATS=5
 785 MAN_MISC_INFO=7
 786 case "$host_os" in
 787
 788 aix*)
 789         dnl Workaround to enable certain features
 790         AC_DEFINE(_SUN,1,[define on AIX to get certain functions])
 791         ;;
 792
 793 hpux*)
 794         #
 795         # Use System V conventions for man pages.
 796         #
 797         MAN_FILE_FORMATS=4
 798         MAN_MISC_INFO=5
 799         ;;
 800
 801 irix*)
 802         V_GROUP=sys
 803
 804         #
 805         # Use System V conventions for man pages.
 806         #
 807         MAN_FILE_FORMATS=4
 808         MAN_MISC_INFO=5
 809         ;;
 810
 811 osf*)
 812         V_GROUP=system
 813
 814         #
 815         # Use System V conventions for man pages.
 816         #
 817         MAN_FILE_FORMATS=4
 818         MAN_MISC_INFO=5
 819         ;;
 820
 821 solaris*)
 822         V_GROUP=sys
 823
 824         #
 825         # Use System V conventions for man pages.
 826         #
 827         MAN_FILE_FORMATS=4
 828         MAN_MISC_INFO=5
 829         ;;
 830 esac
 831
 832 if test -f /dev/bpf0 ; then
 833         V_GROUP=bpf
 834 fi
 835
 836 #
 837 # Make sure we have a definition for C99's uintptr_t (regardless of
 838 # whether the environment is a C99 environment or not).
 839 #
 840 AC_TYPE_UINTPTR_T
 841
 842 #
 843 # Check whether we have pcap/pcap-inttypes.h.
 844 # If we do, we use that to get the C99 types defined.
 845 #
 846 savedcppflags="$CPPFLAGS"
 847 CPPFLAGS="$CPPFLAGS $V_INCLS"
 848 AC_CHECK_HEADERS(pcap/pcap-inttypes.h)
 849 CPPFLAGS="$savedcppflags"
 850
 851 #
 852 # Define the old BSD specified-width types in terms of the C99 types;
 853 # we may need them with libpcap include files.
 854 #
 855 AC_CHECK_TYPE([u_int8_t], ,
 856         [AC_DEFINE([u_int8_t], [uint8_t],
 857         [Define to `uint8_t' if u_int8_t not defined.])],
 858         [AC_INCLUDES_DEFAULT
 859 #include <sys/types.h>
 860 ])
 861 AC_CHECK_TYPE([u_int16_t], ,
 862         [AC_DEFINE([u_int16_t], [uint16_t],
 863         [Define to `uint16_t' if u_int16_t not defined.])],
 864         [AC_INCLUDES_DEFAULT
 865 #include <sys/types.h>
 866 ])
 867 AC_CHECK_TYPE([u_int32_t], ,
 868         [AC_DEFINE([u_int32_t], [uint32_t],
 869         [Define to `uint32_t' if u_int32_t not defined.])],
 870         [AC_INCLUDES_DEFAULT
 871 #include <sys/types.h>
 872 ])
 873 AC_CHECK_TYPE([u_int64_t], ,
 874         [AC_DEFINE([u_int64_t], [uint64_t],
 875         [Define to `uint64_t' if u_int64_t not defined.])],
 876         [AC_INCLUDES_DEFAULT
 877 #include <sys/types.h>
 878 ])
 879
 880 AC_PROG_RANLIB
 881 AC_CHECK_TOOL([AR], [ar])
 882
 883 AC_LBL_DEVEL(V_CCOPT)
 884
 885 # Check for OpenSSL/libressl libcrypto
 886 AC_MSG_CHECKING(whether to use OpenSSL/libressl libcrypto)
 887 # Specify location for both includes and libraries.
 888 want_libcrypto=ifavailable
 889 AC_ARG_WITH(crypto,
 890     AS_HELP_STRING([--with-crypto]@<:@=DIR@:>@,
 891                    [use OpenSSL/libressl libcrypto (located in directory DIR, if specified) @<:@default=yes, if available@:>@]),
 892 [
 893         if test $withval = no
 894         then
 895                 # User doesn't want to link with libcrypto.
 896                 want_libcrypto=no
 897                 AC_MSG_RESULT(no)
 898         elif test $withval = yes
 899         then
 900                 # User wants to link with libcrypto but hasn't specified
 901                 # a directory.
 902                 want_libcrypto=yes
 903                 AC_MSG_RESULT(yes)
 904         else
 905                 # User wants to link with libcrypto and has specified
 906                 # a directory, so use the provided value.
 907                 want_libcrypto=yes
 908                 libcrypto_root=$withval
 909                 AC_MSG_RESULT([yes, using the version installed in $withval])
 910
 911                 #
 912                 # Put the subdirectories of the libcrypto root directory
 913                 # at the front of the header and library search path.
 914                 #
 915                 CFLAGS="-I$withval/include $CFLAGS"
 916                 LIBS="-L$withval/lib $LIBS"
 917         fi
 918 ],[
 919         #
 920         # Use libcrypto if it's present, otherwise don't; no directory
 921         # was specified.
 922         #
 923         want_libcrypto=ifavailable
 924         AC_MSG_RESULT([yes, if available])
 925 ])
 926 if test "$want_libcrypto" != "no"; then
 927         #
 928         # Don't check for libcrypto unless we have its headers;
 929         # Apple, bless their pointy little heads, apparently ship
 930         # libcrypto as a library, but not the header files, in
 931         # El Capitan, probably because they don't want you writing
 932         # nasty portable code that could run on other UN*Xes, they
 933         # want you writing code that uses their Shiny New Crypto
 934         # Library and that only runs on macOS.
 935         #
 936         AC_CHECK_HEADER(openssl/crypto.h,
 937         [
 938                 AC_CHECK_LIB(crypto, DES_cbc_encrypt)
 939                 if test "$ac_cv_lib_crypto_DES_cbc_encrypt" = "yes"; then
 940                         AC_CHECK_HEADERS(openssl/evp.h)
 941                         #
 942                         # OK, then:
 943                         #
 944                         # 1) do we have EVP_CIPHER_CTX_new?
 945                         # If so, we use it to allocate an
 946                         # EVP_CIPHER_CTX, as EVP_CIPHER_CTX may be
 947                         # opaque; otherwise, we allocate it ourselves.
 948                         #
 949                         # 2) do we have EVP_CipherInit_ex()?
 950                         # If so, we use it, because we need to be
 951                         # able to make two "initialize the cipher"
 952                         # calls, one with the cipher and key, and
 953                         # one with the IV, and, as of OpenSSL 1.1,
 954                         # You Can't Do That with EVP_CipherInit(),
 955                         # because a call to EVP_CipherInit() will
 956                         # unconditionally clear the context, and
 957                         # if you don't supply a cipher, it'll
 958                         # clear the cipher, rendering the context
 959                         # unusable and causing a crash.
 960                         #
 961                         AC_CHECK_FUNCS(EVP_CIPHER_CTX_new EVP_CipherInit_ex)
 962                 fi
 963         ])
 964 fi
 965
 966 # Check for libcap-ng
 967 AC_MSG_CHECKING(whether to use libcap-ng)
 968 # Specify location for both includes and libraries.
 969 want_libcap_ng=ifavailable
 970 AC_ARG_WITH(cap_ng,
 971     AS_HELP_STRING([--with-cap-ng],
 972                    [use libcap-ng @<:@default=yes, if available@:>@]),
 973 [
 974         if test $withval = no
 975         then
 976                 want_libcap_ng=no
 977                 AC_MSG_RESULT(no)
 978         elif test $withval = yes
 979         then
 980                 want_libcap_ng=yes
 981                 AC_MSG_RESULT(yes)
 982         fi
 983 ],[
 984         #
 985         # Use libcap-ng if it's present, otherwise don't.
 986         #
 987         want_libcap_ng=ifavailable
 988         AC_MSG_RESULT([yes, if available])
 989 ])
 990 if test "$want_libcap_ng" != "no"; then
 991         AC_CHECK_LIB(cap-ng, capng_change_id)
 992         AC_CHECK_HEADERS(cap-ng.h)
 993 fi
 994
 995 dnl
 996 dnl set additional include path if necessary
 997 if test "$missing_includes" = "yes"; then
 998         CPPFLAGS="$CPPFLAGS -I$srcdir/missing"
 999         V_INCLS="$V_INCLS -I$srcdir/missing"
1000 fi
1001
1002 AC_SUBST(V_CCOPT)
1003 AC_SUBST(V_DEFS)
1004 AC_SUBST(V_GROUP)
1005 AC_SUBST(V_INCLS)
1006 AC_SUBST(V_PCAPDEP)
1007 AC_SUBST(LOCALSRC)
1008 AC_SUBST(MAN_FILE_FORMATS)
1009 AC_SUBST(MAN_MISC_INFO)
1010
1011 AC_PROG_INSTALL
1012
1013 AC_CONFIG_HEADER(config.h)
1014
1015 AC_OUTPUT_COMMANDS([if test -f .devel; then
1016         echo timestamp > stamp-h
1017         cat Makefile-devel-adds >> Makefile
1018         make depend
1019 fi])
1020 AC_OUTPUT(Makefile tcpdump.1)
1021 exit 0