XXXX adding PID information to netstat output

*** 2720,2724 ****
--- 2720,2756 ----
          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);
+ }