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-rw-r--r--src/vnet/sctp/sctp_output.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/src/vnet/sctp/sctp_output.c b/src/vnet/sctp/sctp_output.c
index 8863012c041..e76f67b3e3e 100644
--- a/src/vnet/sctp/sctp_output.c
+++ b/src/vnet/sctp/sctp_output.c
@@ -1334,8 +1334,10 @@ static void
sctp_push_hdr_i (sctp_connection_t * sctp_conn, vlib_buffer_t * b,
sctp_state_t next_state)
{
- u16 data_len =
- b->current_length + b->total_length_not_including_first_buffer;
+ u16 data_len = b->current_length;
+
+ if (b->flags & VLIB_BUFFER_TOTAL_LENGTH_VALID)
+ data_len += b->total_length_not_including_first_buffer;
ASSERT (!b->total_length_not_including_first_buffer
|| (b->flags & VLIB_BUFFER_NEXT_PRESENT));