include config.h from lib/socket.c and use this to conditionaly

compile code to set sin_len on platforms that require this field
in the sockaddr structures.

Makefile.in

@@ -4,7 +4,7 @@ libdir = @libdir@
 bindir = @bindir@
 LIBS="-lpopt"
 CC=gcc
-CFLAGS=-g -O0 -fPIC -Wall -W -I./include "-D_U_=__attribute__((unused))"
+CFLAGS=-g -O0 -fPIC -Wall -W -I. -I./include "-D_U_=__attribute__((unused))"
 LIBISCSI_OBJ = lib/connect.o lib/crc32c.o lib/discovery.o lib/init.o lib/login.o lib/nop.o lib/pdu.o lib/scsi-command.o lib/scsi-lowlevel.o lib/socket.o lib/sync.o
 INSTALLCMD = /usr/bin/install -c
 

lib/socket.c

@@ -14,6 +14,7 @@
    You should have received a copy of the GNU Lesser General Public License
    along with this program; if not, see <http://www.gnu.org/licenses/>.
 */
+#include "config.h"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -98,6 +99,9 @@ iscsi_connect_async(struct iscsi_context *iscsi, const char *portal,
 		return -1;
 
 	}
+#ifdef HAVE_SOCK_SIN_LEN
+	s.ss_len = socksize;
+#endif
 
 	if (iscsi->fd == -1) {
 		iscsi_set_error(iscsi, "Failed to open iscsi socket. "