added the check for struct ip_mreqn

hio/configure

@@ -16307,6 +16307,20 @@ _ACEOF
 fi
 
 
+ac_fn_c_check_type "$LINENO" "struct ip_mreqn" "ac_cv_type_struct_ip_mreqn" "#include <sys/types.h>
+	 #include <sys/socket.h>
+	 #include <netinet/in.h>
+"
+if test "x$ac_cv_type_struct_ip_mreqn" = xyes; then :
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_STRUCT_IP_MREQN 1
+_ACEOF
+
+
+fi
+
+
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for va_copy" >&5
 $as_echo_n "checking for va_copy... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext

hio/configure.ac

@@ -352,6 +352,11 @@ AC_CHECK_TYPES([struct timespec], [], [],
 	 #include <sys/time.h>
 	 #endif])
 
+AC_CHECK_TYPES([struct ip_mreqn], [], [],
+	[#include <sys/types.h> 
+	 #include <sys/socket.h> 
+	 #include <netinet/in.h>])
+
 AC_MSG_CHECKING([for va_copy])
 AC_TRY_LINK(
 	[#include <stdarg.h>],

hio/lib/hio-cfg.h.in

@@ -352,6 +352,9 @@
 /* Define to 1 if the system has the type `struct if_laddrreq'. */
 #undef HAVE_STRUCT_IF_LADDRREQ
 
+/* Define to 1 if the system has the type `struct ip_mreqn'. */
+#undef HAVE_STRUCT_IP_MREQN
+
 /* Define to 1 if the system has the type `struct lifconf'. */
 #undef HAVE_STRUCT_LIFCONF
 

hio/lib/sck.c

@@ -2518,11 +2518,17 @@ static int update_mcast_group (hio_dev_sck_t* dev, int join, const hio_skad_t* m
 		case HIO_AF_INET:
 		{
 			/* TODO: if ip_mreqn doesn't exist, get the ip address of the index and set to imr_address */
+		#if defined(HAVE_STRUCT_IP_MREQN)
 			struct ip_mreqn mreq;
+		#else
+			struct ip_mreq mreq;
+		#endif
 			HIO_MEMSET (&mreq, 0, HIO_SIZEOF(mreq));
 			hio_skad_get_ipad_bytes (mcast_skad, &mreq.imr_multiaddr, HIO_SIZEOF(mreq.imr_multiaddr));
+			/*mreq.imr_address = TODO: fill it will the ifindex's ip address */
+		#if defined(HAVE_STRUCT_IP_MREQN)
 			mreq.imr_ifindex = ifindex;
-			/*mreq.imr_address = */
+		#endif
 			if (hio_dev_sck_setsockopt(dev, IPPROTO_IP, (join? IP_ADD_MEMBERSHIP: IP_DROP_MEMBERSHIP), &mreq, HIO_SIZEOF(mreq)) <= -1) return -1;
 			return 0;
 		}