[dpdk-dev] [PATCH] net/i40e: illagel pactket checking

[Yanglong Wu]

Some illegal packets will lead to TX/RX hang and
can't recover automatically. This pacth check those
illegal packets and protect TX/RX from hanging.

Signed-off-by: Yanglong Wu <yanglong.wu at intel.com>
---
 drivers/net/i40e/i40e_rxtx.c | 10 ++++++++++
 drivers/net/i40e/i40e_rxtx.h |  2 ++
 2 files changed, 12 insertions(+)

diff --git a/drivers/net/i40e/i40e_rxtx.c b/drivers/net/i40e/i40e_rxtx.c
index 6032d5541..be00b898e 100644
--- a/drivers/net/i40e/i40e_rxtx.c
+++ b/drivers/net/i40e/i40e_rxtx.c
@@ -1458,6 +1458,16 @@ i40e_prep_pkts(__rte_unused void *tx_queue, struct rte_mbuf **tx_pkts,
 			return i;
 		}
 
+		/*check the size of pkt len*/
+		if (m->pkt_len > ETHER_MAX_LEN || m->pkt_len < I40E_TX_MIN_PKT_LEN){
+			rte_errno = -EINVAL;
+			return i;}
+
+		/*check the number of mbuf segments*/
+		if(m->nb_segs > I40E_TX_MAX_MTU_SEG){
+			rte_errno = -EINVAL;
+			return i;}
+
 #ifdef RTE_LIBRTE_ETHDEV_DEBUG
 		ret = rte_validate_tx_offload(m);
 		if (ret != 0) {
diff --git a/drivers/net/i40e/i40e_rxtx.h b/drivers/net/i40e/i40e_rxtx.h
index ea73a8a1b..3fc619af9 100644
--- a/drivers/net/i40e/i40e_rxtx.h
+++ b/drivers/net/i40e/i40e_rxtx.h
@@ -30,6 +30,8 @@
 #define I40E_TX_MAX_SEG     UINT8_MAX
 #define I40E_TX_MAX_MTU_SEG 8
 
+#define I40E_TX_MIN_PKT_LEN 17
+
 #undef container_of
 #define container_of(ptr, type, member) ({ \
 		typeof(((type *)0)->member)(*__mptr) = (ptr); \
-- 
2.11.0