Annotation of embedaddon/libnet/m4/acinclude.m4, revision 1.1
1.1 ! misho 1: dnl $Id: acinclude.m4,v 1.3 2004/01/15 23:53:06 mike Exp $
! 2: dnl
! 3: dnl Libnet specific autoconf macros
! 4: dnl Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
! 5: dnl All rights reserved.
! 6: dnl
! 7:
! 8: dnl
! 9: dnl Check for the Linux /proc filesystem
! 10: dnl
! 11: dnl usage: AC_LIBNET_LINUX_PROCFS
! 12: dnl results: HAVE_LINUX_PROCFS
! 13: dnl
! 14: AC_DEFUN([AC_LIBNET_LINUX_PROCFS],
! 15: [AC_MSG_CHECKING(for Linux proc filesystem)
! 16: AC_CACHE_VAL(ac_cv_libnet_linux_procfs,
! 17: if test "x`cat /proc/sys/kernel/ostype 2>&-`" = "xLinux" ; then
! 18: ac_cv_libnet_linux_procfs=yes
! 19: else
! 20: ac_cv_libnet_linux_procfs=no
! 21: fi)
! 22: AC_MSG_RESULT($ac_cv_libnet_linux_procfs)
! 23: if test $ac_cv_libnet_linux_procfs = yes ; then
! 24: AC_DEFINE(HAVE_LINUX_PROCFS, 1,
! 25: [Define if you have the Linux /proc filesystem.])
! 26: fi])
! 27:
! 28: dnl
! 29: dnl Checks to see if this linux kernel has a working PF_PACKET
! 30: dnl
! 31: dnl usage:
! 32: dnl
! 33: dnl AC_LIBNET_CHECK_PF_PACKET
! 34: dnl
! 35: dnl results:
! 36: dnl
! 37: dnl HAVE_PACKET_SOCKET (DEFINED)
! 38: dnl
! 39:
! 40: AC_DEFUN([AC_LIBNET_CHECK_PF_PACKET],
! 41: [
! 42: AC_MSG_CHECKING(for packet socket (PF_PACKET))
! 43: AC_CACHE_VAL(libnet_cv_have_packet_socket,
! 44:
! 45: [
! 46: cat > pf_packet-test.c << EOF
! 47: #include <stdio.h>
! 48: #include <errno.h>
! 49: #include <stdlib.h>
! 50: #include <netinet/in.h>
! 51: #include <sys/socket.h>
! 52: #include <features.h> /* for the glibc version number */
! 53: #if __GLIBC__ >= 2 && __GLIBC_MINOR >= 1
! 54: #include <netpacket/packet.h>
! 55: #include <net/ethernet.h> /* the L2 protocols */
! 56: #else
! 57: #include <asm/types.h>
! 58: #include <linux/if_packet.h>
! 59: #include <linux/if_ether.h> /* The L2 protocols */
! 60: #endif
! 61:
! 62: #ifndef SOL_PACKET
! 63: #define SOL_PACKET 263
! 64: #endif /* SOL_PACKET */
! 65:
! 66: int
! 67: main(int argc, char **argv)
! 68: {
! 69: int fd;
! 70:
! 71: fd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
! 72: if (fd == -1)
! 73: {
! 74: if (errno == EPERM)
! 75: {
! 76: /* user's UID != 0 */
! 77: printf("probably");
! 78: exit (EXIT_FAILURE);
! 79: }
! 80: printf("no");
! 81: exit (EXIT_FAILURE);
! 82: }
! 83: printf("yes");
! 84: exit (EXIT_SUCCESS);
! 85: }
! 86: EOF
! 87: ${CC-cc} -o pf_packet-test $CFLAGS pf_packet-test.c >/dev/null 2>&1
! 88:
! 89: # Oopz 4.3 BSD doesn't have this. Sorry.
! 90: if test ! -x ./pf_packet-test ; then
! 91: libnet_cv_have_packet_socket=choked
! 92: else
! 93: libnet_cv_have_packet_socket=`./pf_packet-test`;
! 94: fi
! 95: if test $libnet_cv_have_packet_socket = choked; then
! 96: AC_MSG_RESULT(test program compile choked... assuming no)
! 97: elif test $libnet_cv_have_packet_socket = yes; then
! 98: AC_MSG_RESULT(yes)
! 99: elif test $libnet_cv_have_packet_socket = probably; then
! 100: AC_MSG_RESULT(test program got EPERM... assuming yes)
! 101: elif test $libnet_cv_have_packet_socket = no; then
! 102: AC_MSG_RESULT(no)
! 103: fi
! 104:
! 105: rm -f pf_packet-test* core core.pf_packet-test
! 106:
! 107: ])
! 108:
! 109: if test $libnet_cv_have_packet_socket = yes -o $libnet_cv_have_packet_socket = probably; then
! 110: AC_DEFINE(HAVE_PACKET_SOCKET, 1,
! 111: [Define if we're running on a Linux system with PF_PACKET sockets.])
! 112: fi
! 113: ])
! 114:
! 115: dnl
! 116: dnl Looks for a previous libnet version and attempts to determine which version
! 117: dnl it is. Version 0.8 was the first version that actually knew internally
! 118: dnl what version it was.
! 119: dnl
! 120: dnl usage:
! 121: dnl
! 122: dnl AC_LIBNET_CHECK_LIBNET_VERSION
! 123: dnl
! 124: dnl results:
! 125: dnl
! 126: dnl
! 127: dnl
! 128:
! 129: AC_DEFUN([AC_LIBNET_CHECK_LIBNET_VER],
! 130: [
! 131: AC_CHECK_LIB(net, libnet_build_ip, AC_MSG_CHECKING(version) \
! 132:
! 133: changequote(<<, >>)dnl
! 134: if [[ ! -f $LIB_PREFIX/libnet.a ]] ; then
! 135: changequote([, ])dnl
! 136: AC_MSG_RESULT($LIB_PREFIX/libnet.a doesn't exist)
! 137: AC_MSG_RESULT(previous libnet install lives elsewhere, you should probably find it)
! 138: else
! 139: __LIBNET_VERSION=`strings $LIB_PREFIX/libnet.a | grep "libnet version"\
! 140: | cut -f3 -d" "`;\
! 141: if test -z "$__LIBNET_VERSION"; then
! 142: AC_MSG_RESULT(<0.8)
! 143: else
! 144: AC_MSG_RESULT($__LIBNET_VERSION)
! 145: fi
! 146: fi\
! 147: )
! 148: ])
! 149:
! 150:
! 151: dnl
! 152: dnl Checks to see if this linux kernel uses ip_sum or ip_csum
! 153: dnl (Pulled from queso)
! 154: dnl
! 155: dnl usage:
! 156: dnl
! 157: dnl AC_LIBNET_CHECK_IP_CSUM
! 158: dnl
! 159: dnl results:
! 160: dnl
! 161: dnl HAVE_STRUCT_IP_CSUM (DEFINED)
! 162: dnl
! 163:
! 164: AC_DEFUN([AC_LIBNET_CHECK_IP_CSUM],
! 165: [
! 166: AC_MSG_CHECKING([struct ip contains ip_csum])
! 167: AC_TRY_COMPILE([
! 168: #define __BSD_SOURCE
! 169: #define _BSD_SOURCE
! 170: #define _DEFAULT_SOURCE
! 171: #include <sys/types.h>
! 172: #include <netinet/in.h>
! 173: #include <netinet/in_systm.h>
! 174: #include <netinet/ip.h>],
! 175: [
! 176: struct ip ip;
! 177: ip.ip_csum = 0;
! 178: ],
! 179: [AC_MSG_RESULT(yes);
! 180: AC_DEFINE(HAVE_STRUCT_IP_CSUM)],
! 181: [AC_MSG_RESULT(no);
! 182: ])
! 183: ])
! 184:
! 185:
! 186: dnl
! 187: dnl Checks endianess
! 188: dnl
! 189: dnl usage:
! 190: dnl
! 191: dnl AC_LIBNET_ENDIAN_CHECK
! 192: dnl
! 193: dnl results:
! 194: dnl
! 195: dnl LIBNET_BIG_ENDIAN = 1 or
! 196: dnl LIBNET_LIL_ENDIAN = 1
! 197: dnl
! 198:
! 199: AC_DEFUN([AC_LIBNET_ENDIAN_CHECK],
! 200: [AC_C_BIGENDIAN
! 201: if test $ac_cv_c_bigendian = yes ; then
! 202: AC_DEFINE(LIBNET_BIG_ENDIAN, 1,
! 203: [We are running on a big-endian machine.])
! 204: ENDIANESS="LIBNET_BIG_ENDIAN"
! 205: PKG_CONFIG_DEFINES="$PKG_CONFIG_DEFINES -DLIBNET_BIG_ENDIAN"
! 206: else
! 207: AC_DEFINE(LIBNET_LIL_ENDIAN, 1,
! 208: [We are running on a little-endian machine.])
! 209: ENDIANESS="LIBNET_LIL_ENDIAN"
! 210: PKG_CONFIG_DEFINES="$PKG_CONFIG_DEFINES -DLIBNET_LIL_ENDIAN"
! 211: fi
! 212: ])
! 213:
! 214: dnl
! 215: dnl Improved version of AC_CHECK_LIB
! 216: dnl
! 217: dnl Thanks to John Hawkinson (jhawk@mit.edu)
! 218: dnl
! 219: dnl usage:
! 220: dnl
! 221: dnl AC_LBL_CHECK_LIB(LIBRARY, FUNCTION [, ACTION-IF-FOUND [,
! 222: dnl ACTION-IF-NOT-FOUND [, OTHER-LIBRARIES]]])
! 223: dnl
! 224: dnl results:
! 225: dnl
! 226: dnl LIBS
! 227: dnl
! 228:
! 229: define([AC_LBL_CHECK_LIB],
! 230: [AC_MSG_CHECKING([for $2 in -l$1])
! 231: dnl Use a cache variable name containing both the library and function name,
! 232: dnl because the test really is for library $1 defining function $2, not
! 233: dnl just for library $1. Separate tests with the same $1 and different $2's
! 234: dnl may have different results.
! 235: ac_lib_var=`echo $1['_']$2['_']$5 | sed 'y%./+- %__p__%'`
! 236: AC_CACHE_VAL(ac_cv_lbl_lib_$ac_lib_var,
! 237: [ac_save_LIBS="$LIBS"
! 238: LIBS="-l$1 $5 $LIBS"
! 239: AC_TRY_LINK(dnl
! 240: ifelse([$2], [main], , dnl Avoid conflicting decl of main.
! 241: [/* Override any gcc2 internal prototype to avoid an error. */
! 242: ]ifelse(AC_LANG, CPLUSPLUS, [#ifdef __cplusplus
! 243: extern "C"
! 244: #endif
! 245: ])dnl
! 246: [/* We use char because int might match the return type of a gcc2
! 247: builtin and then its argument prototype would still apply. */
! 248: char $2();
! 249: ]),
! 250: [$2()],
! 251: eval "ac_cv_lbl_lib_$ac_lib_var=yes",
! 252: eval "ac_cv_lbl_lib_$ac_lib_var=no")
! 253: LIBS="$ac_save_LIBS"
! 254: ])dnl
! 255: if eval "test \"`echo '$ac_cv_lbl_lib_'$ac_lib_var`\" = yes"; then
! 256: AC_MSG_RESULT(yes)
! 257: ifelse([$3], ,
! 258: [changequote(, )dnl
! 259: ac_tr_lib=HAVE_LIB`echo $1 | sed -e 's/[^a-zA-Z0-9_]/_/g' \
! 260: -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
! 261: changequote([, ])dnl
! 262: AC_DEFINE_UNQUOTED($ac_tr_lib)
! 263: LIBS="-l$1 $LIBS"
! 264: ], [$3])
! 265: else
! 266: AC_MSG_RESULT(no)
! 267: ifelse([$4], , , [$4
! 268: ])dnl
! 269: fi
! 270: ])
! 271:
! 272: dnl
! 273: dnl AC_LBL_LIBRARY_NET
! 274: dnl
! 275: dnl This test is for network applications that need socket() and
! 276: dnl gethostbyname() -ish functions. Under Solaris, those applications
! 277: dnl need to link with "-lsocket -lnsl". Under IRIX, they need to link
! 278: dnl with "-lnsl" but should *not* link with "-lsocket" because
! 279: dnl libsocket.a breaks a number of things (for instance:
! 280: dnl gethostbyname() under IRIX 5.2, and snoop sockets under most
! 281: dnl versions of IRIX).
! 282: dnl
! 283: dnl Unfortunately, many application developers are not aware of this,
! 284: dnl and mistakenly write tests that cause -lsocket to be used under
! 285: dnl IRIX. It is also easy to write tests that cause -lnsl to be used
! 286: dnl under operating systems where neither are necessary (or useful),
! 287: dnl such as SunOS 4.1.4, which uses -lnsl for TLI.
! 288: dnl
! 289: dnl This test exists so that every application developer does not test
! 290: dnl this in a different, and subtly broken fashion.
! 291:
! 292: dnl It has been argued that this test should be broken up into two
! 293: dnl separate tests, one for the resolver libraries, and one for the
! 294: dnl libraries necessary for using Sockets API. Unfortunately, the two
! 295: dnl are carefully intertwined and allowing the autoconf user to use
! 296: dnl them independently potentially results in unfortunate ordering of
! 297: dnl dependencies -- as such, such component macros would have to
! 298: dnl carefully use indirection and be aware if the other components were
! 299: dnl executed. Since other autoconf macros do not go to this trouble,
! 300: dnl and almost no applications use sockets without the resolver, this
! 301: dnl complexity has not been implemented.
! 302: dnl
! 303: dnl The check for libresolv is in case you are attempting to link
! 304: dnl statically and happen to have a libresolv.a lying around (and no
! 305: dnl libnsl.a).
! 306: dnl
! 307: AC_DEFUN([AC_LBL_LIBRARY_NET],
! 308: [
! 309: # Most operating systems have gethostbyname() in the default searched
! 310: # libraries (i.e. libc):
! 311: AC_CHECK_FUNC(gethostbyname, ,
! 312: # Some OSes (eg. Solaris) place it in libnsl:
! 313: AC_LBL_CHECK_LIB(nsl, gethostbyname, ,
! 314: # Some strange OSes (SINIX) have it in libsocket:
! 315: AC_LBL_CHECK_LIB(socket, gethostbyname, ,
! 316: # Unfortunately libsocket sometimes depends on libnsl.
! 317: # AC_CHECK_LIB's API is essentially broken so the
! 318: # following ugliness is necessary:
! 319: AC_LBL_CHECK_LIB(socket, gethostbyname,
! 320: LIBS="-lsocket -lnsl $LIBS",
! 321: AC_CHECK_LIB(resolv, gethostbyname),
! 322: -lnsl))))
! 323: AC_CHECK_FUNC(socket, , AC_CHECK_LIB(socket, socket, ,
! 324: AC_LBL_CHECK_LIB(socket, socket, LIBS="-lsocket -lnsl $LIBS", ,
! 325: -lnsl)))
! 326: # DLPI needs putmsg under HPUX so test for -lstr while we're at it
! 327: AC_CHECK_LIB(str, putmsg)
! 328: ])
! 329:
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