Don't require IPv6 library support in order to support IPv6 addresses.

Have our own routines to convert between IPv4/IPv6 addresses and
strings; that helps if, for example, we want to build binary versions of
tcpdump for Windows that can run both on NT 5 (W2K/WXP), which doesn't
have inet_ntop() or inet_pton(), and NT 6 (Vista/7/8/10), which do.  It
also means that we don't require IPv6 library support on UN*X to print
addresses (if somebody wants to build tcpdump for older UN*Xes lacking
IPv6 support in the system library or in add-on libraries).

Get rid of files in the missing directory that we don't need, and
various no-longer-necessary autoconf tests.

1 files changed, 0 insertions, 125 deletions

diff --git a/aclocal.m4 b/aclocal.m4
index acb4e7d9..6b04a4c4 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -1150,131 +1150,6 @@ dnl OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 dnl SUCH DAMAGE.
 
 dnl
-dnl Checks to see if AF_INET6 is defined
-AC_DEFUN(AC_CHECK_AF_INET6, [
-	AC_MSG_CHECKING(for AF_INET6)
-	AC_CACHE_VAL($1,
-	AC_TRY_COMPILE([
-#		include <sys/types.h>
-#		include <sys/socket.h>],
-		[int a = AF_INET6],
-		$1=yes,
-		$1=no))
-	AC_MSG_RESULT($$1)
-		if test $$1 = yes ; then
-			AC_DEFINE(HAVE_AF_INET6)
-	fi
-])
-
-dnl
-dnl Checks to see if the sockaddr struct has the 4.4 BSD sa_len member
-dnl borrowed from LBL libpcap
-AC_DEFUN(AC_CHECK_SA_LEN, [
-	AC_MSG_CHECKING(if sockaddr struct has sa_len member)
-	AC_CACHE_VAL($1,
-	AC_TRY_COMPILE([
-#		include <sys/types.h>
-#		include <sys/socket.h>],
-		[u_int i = sizeof(((struct sockaddr *)0)->sa_len)],
-		$1=yes,
-		$1=no))
-	AC_MSG_RESULT($$1)
-		if test $$1 = yes ; then
-			AC_DEFINE(HAVE_SOCKADDR_SA_LEN)
-	fi
-])
-
-dnl
-dnl Checks for addrinfo structure
-AC_DEFUN(AC_STRUCT_ADDRINFO, [
-	AC_MSG_CHECKING(for addrinfo)
-	AC_CACHE_VAL($1,
-	AC_TRY_COMPILE([
-#		include <netdb.h>],
-		[struct addrinfo a],
-		$1=yes,
-		$1=no))
-	AC_MSG_RESULT($$1)
-	if test $$1 = yes; then
-		AC_DEFINE(HAVE_ADDRINFO, 1,
-		    [define if you have the addrinfo function])
-	else
-		AC_DEFINE(NEED_ADDRINFO_H, 1,
-		    [define if you need to include missing/addrinfo.h])
-	fi
-])
-
-dnl
-dnl Checks for NI_MAXSERV
-AC_DEFUN(AC_NI_MAXSERV, [
-	AC_MSG_CHECKING(for NI_MAXSERV)
-	AC_CACHE_VAL($1,
-	AC_EGREP_CPP(yes, [#include <netdb.h>
-#ifdef NI_MAXSERV
-yes
-#endif],
-		$1=yes,
-		$1=no))
-	AC_MSG_RESULT($$1)
-	if test $$1 != yes; then
-		AC_DEFINE(NEED_ADDRINFO_H)
-	fi
-])
-
-dnl
-dnl Checks for NI_NAMEREQD
-AC_DEFUN(AC_NI_NAMEREQD, [
-	AC_MSG_CHECKING(for NI_NAMEREQD)
-	AC_CACHE_VAL($1,
-	AC_EGREP_CPP(yes, [#include <netdb.h>
-#ifdef NI_NOFQDN
-yes
-#endif],
-		$1=yes,
-		$1=no))
-	AC_MSG_RESULT($$1)
-	if test $$1 != yes; then
-		AC_DEFINE(NEED_ADDRINFO_H)
-	fi
-])
-
-dnl
-dnl Checks for sockaddr_storage structure
-AC_DEFUN(AC_STRUCT_SA_STORAGE, [
-	AC_MSG_CHECKING(for sockaddr_storage)
-	AC_CACHE_VAL($1,
-	AC_TRY_COMPILE([
-#		include <sys/types.h>
-#		include <sys/socket.h>],
-		[struct sockaddr_storage s],
-		$1=yes,
-		$1=no))
-	AC_MSG_RESULT($$1)
-	if test $$1 = yes; then
-		AC_DEFINE(HAVE_SOCKADDR_STORAGE, 1,
-		    [define if you have struct sockaddr_storage])
-	fi
-])
-
-dnl
-dnl check for h_errno
-AC_DEFUN(AC_VAR_H_ERRNO, [
-	AC_MSG_CHECKING(for h_errno)
-	AC_CACHE_VAL(ac_cv_var_h_errno,
-	AC_TRY_COMPILE([
-#		include <sys/types.h>
-#		include <netdb.h>],
-		[int foo = h_errno;],
-		ac_cv_var_h_errno=yes,
-		ac_cv_var_h_errno=no))
-	AC_MSG_RESULT($ac_cv_var_h_errno)
-	if test "$ac_cv_var_h_errno" = "yes"; then
-		AC_DEFINE(HAVE_H_ERRNO, 1,
-		    [define if you have the h_errno variable])
-	fi
-])
-
-dnl
 dnl Test for __attribute__
 dnl