XXXX adding PID information to netstat output

@@ -2720,5 +2720,37 @@
         ctb->ctb_depth = getpcstack(ctb->ctb_stack, CONN_STACK_DEPTH);
         connp->conn_trace_last = last;
         return (1);
 }
 #endif
+
+mblk_t *
+conn_get_pid_mblk(conn_t *connp)
+{
+        mblk_t *mblk;
+        conn_pid_info_t *cpi;
+
+        /*
+         * If the connection is closing, it is not safe to make an upcall or
+         * access the stream associated with the connection.
+         */
+        if (!(connp->conn_state_flags & CONN_CLOSING)) {
+                if (connp->conn_upper_handle != NULL) {
+                        return (*connp->conn_upcalls->su_get_sock_pid_mblk)
+                            (connp->conn_upper_handle);
+                } else if (!IPCL_IS_NONSTR(connp) && connp->conn_rq != NULL &&
+                    connp->conn_rq->q_stream != NULL) {
+                        return (sh_get_pid_mblk(connp->conn_rq->q_stream));
+                }
+        }
+
+        /* return an empty mblk */
+        if ((mblk = allocb(sizeof (conn_pid_info_t), BPRI_HI)) == NULL)
+                return (NULL);
+        mblk->b_wptr += sizeof (conn_pid_info_t);
+        cpi = (conn_pid_info_t *)mblk->b_datap->db_base;
+        cpi->cpi_contents = CONN_PID_INFO_NON;
+        cpi->cpi_pids_cnt = 0;
+        cpi->cpi_tot_size = sizeof (conn_pid_info_t);
+        cpi->cpi_pids[0] = 0;
+        return (mblk);
+}