Add a new helper function _set_itt() that can be used to set the itt of

a pdu, instead of having to twiddle the bits and bytes manually.

lib/pdu.c

@@ -280,6 +280,12 @@ iscsi_process_pdu(struct iscsi_context *iscsi, struct iscsi_in_pdu *in)
 	return 0;
 }
 
+void
+iscsi_pdu_set_itt(struct iscsi_pdu *pdu, uint32_t itt)
+{
+	*(uint32_t *)&pdu->outdata.data[16] = htonl(itt);
+}
+
 void
 iscsi_pdu_set_pduflags(struct iscsi_pdu *pdu, unsigned char flags)
 {