vcl: fix read ready for cl udp

On fork, cl listeners are not ready, i.e., listen and fifos are
pending, so read ready crashes.

Type: fix

Change-Id: I965bbd7f72706831767615564a88f5dbad38b11e
Signed-off-by: Florin Coras <[email protected]>

diff --git a/src/vcl/vcl_private.c b/src/vcl/vcl_private.c
index dcd827f..714ecda 100644 (file)
--- a/src/vcl/vcl_private.c
+++ b/src/vcl/vcl_private.c
@@ -403,6 +403,10 @@ vcl_session_read_ready (vcl_session_t * s)
          session_dgram_pre_hdr_t ph;
          u32 max_deq;
 
+         /* CL listener that's not yet ready */
+         if (vcl_session_is_cl (s) && !s->rx_fifo)
+           return 0;
+
          max_deq = svm_fifo_max_dequeue_cons (s->rx_fifo);
          if (max_deq <= SESSION_CONN_HDR_LEN)
            return 0;
@@ -442,6 +446,10 @@ vcl_session_read_ready2 (vcl_session_t *s)
 
       if (s->is_dgram)
        {
+         /* CL listener that's not yet ready */
+         if (vcl_session_is_cl (s) && !s->rx_fifo)
+           return 0;
+
          if (svm_fifo_max_dequeue_cons (s->rx_fifo) <= SESSION_CONN_HDR_LEN)
            return 0;