[PATCH v2 1/3] net/mlx5: fix ESP header match in strict mode

[Maayan Kashani]

From: Viacheslav Ovsiienko <viacheslavo at nvidia.com>

The pattern like "eth / ipv6 / esp / end" matched on any IPv6
packet in strict mode, because there was no implicit match on the
IP.proto forced.

This patch adds the implicit match on IP.proto with value 50 (ESP)
and adds implicit match on UDP.dport with value 4500 for the case
ESP over UDP.

Fixes: 81cf20a25abf ("net/mlx5/hws: support match on ESP item")
Cc: stable at dpdk.org

Signed-off-by: Viacheslav Ovsiienko <viacheslavo at nvidia.com>
Acked-by: Matan Azrad <matan at nvidia.com>
---
 drivers/net/mlx5/hws/mlx5dr_definer.c | 29 +++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/drivers/net/mlx5/hws/mlx5dr_definer.c b/drivers/net/mlx5/hws/mlx5dr_definer.c
index 7464d953739..02eba861bc5 100644
--- a/drivers/net/mlx5/hws/mlx5dr_definer.c
+++ b/drivers/net/mlx5/hws/mlx5dr_definer.c
@@ -14,6 +14,7 @@
 #define UDP_VXLAN_PORT	4789
 #define UDP_VXLAN_GPE_PORT	4790
 #define UDP_GTPU_PORT	2152
+#define UDP_ESP_PORT	4500
 #define UDP_PORT_MPLS	6635
 #define UDP_GENEVE_PORT 6081
 #define UDP_ROCEV2_PORT	4791
@@ -231,6 +232,8 @@ struct mlx5dr_definer_conv_data {
 	X(SET_BE16,	nvgre_protocol,		v->protocol,		rte_flow_item_nvgre) \
 	X(SET_BE32P,	nvgre_dw1,		&v->tni[0],		rte_flow_item_nvgre) \
 	X(SET,		meter_color,		rte_col_2_mlx5_col(v->color),	rte_flow_item_meter_color) \
+	X(SET,		ipsec_protocol,		IPPROTO_ESP,		rte_flow_item_esp) \
+	X(SET,		ipsec_udp_port,		UDP_ESP_PORT,		rte_flow_item_esp) \
 	X(SET_BE32,     ipsec_spi,              v->hdr.spi,             rte_flow_item_esp) \
 	X(SET_BE32,     ipsec_sequence_number,  v->hdr.seq,             rte_flow_item_esp) \
 	X(SET,		ib_l4_udp_port,		UDP_ROCEV2_PORT,	rte_flow_item_ib_bth) \
@@ -2930,6 +2933,32 @@ mlx5dr_definer_conv_item_esp(struct mlx5dr_definer_conv_data *cd,
 	const struct rte_flow_item_esp *m = item->mask;
 	struct mlx5dr_definer_fc *fc;
 
+	/* To match on ESP we must match on ip_protocol and optionally on l4_dport */
+	if (!cd->relaxed) {
+		bool over_udp;
+
+		fc = &cd->fc[DR_CALC_FNAME(IP_PROTOCOL, false)];
+		over_udp = fc->tag_set == &mlx5dr_definer_udp_protocol_set;
+
+		if (over_udp) {
+			fc = &cd->fc[DR_CALC_FNAME(L4_DPORT, false)];
+			if (!fc->tag_set) {
+				fc->item_idx = item_idx;
+				fc->tag_mask_set = &mlx5dr_definer_ones_set;
+				fc->tag_set = &mlx5dr_definer_ipsec_udp_port_set;
+				DR_CALC_SET(fc, eth_l4, destination_port, false);
+			}
+		} else {
+			fc = &cd->fc[DR_CALC_FNAME(IP_PROTOCOL, false)];
+			if (!fc->tag_set) {
+				fc->item_idx = item_idx;
+				fc->tag_set = &mlx5dr_definer_ipsec_protocol_set;
+				fc->tag_mask_set = &mlx5dr_definer_ones_set;
+				DR_CALC_SET(fc, eth_l3, protocol_next_header, false);
+			}
+		}
+	}
+
 	if (!m)
 		return 0;
 	if (m->hdr.spi) {
-- 
2.21.0