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-rw-r--r--src/vnet/session/session_node.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/src/vnet/session/session_node.c b/src/vnet/session/session_node.c
index 7a630715591..c67d63fea80 100644
--- a/src/vnet/session/session_node.c
+++ b/src/vnet/session/session_node.c
@@ -1226,6 +1226,13 @@ session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr),
(u8 *) & ctx->hdr);
+ /* Zero length dgrams not supported */
+ if (PREDICT_FALSE (ctx->hdr.data_length == 0))
+ {
+ svm_fifo_dequeue_drop (ctx->s->tx_fifo, sizeof (ctx->hdr));
+ ctx->max_len_to_snd = 0;
+ return;
+ }
ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
len = ctx->hdr.data_length - ctx->hdr.data_offset;
@@ -1253,12 +1260,13 @@ session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
{
svm_fifo_peek (ctx->s->tx_fifo, offset, sizeof (ctx->hdr),
(u8 *) & hdr);
- ASSERT (hdr.data_length > hdr.data_offset);
dgram_len = hdr.data_length - hdr.data_offset;
if (offset + sizeof (hdr) + hdr.data_length >
ctx->max_dequeue ||
first_dgram_len != dgram_len)
break;
+ /* Assert here to allow test above with zero length dgrams */
+ ASSERT (hdr.data_length > hdr.data_offset);
len += dgram_len;
offset += sizeof (hdr) + hdr.data_length;
}