examples/ipsec-secgw: fix esp padding check

Current code fails to correctly check padding sequence for inbound
packets.
Padding sequence starts on 1 but it checks for 0.

Fixes: d299106e8e31 ("examples/ipsec-secgw: add IPsec sample application")
Signed-off-by: Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>

diff --git a/examples/ipsec-secgw/esp.c b/examples/ipsec-secgw/esp.c
index 0f6b33efdae7170b14d80cb65cc5181a20271236..7dce78cec45db1e9b261b0241c3ec207b3be2960 100644 (file)
--- a/examples/ipsec-secgw/esp.c
+++ b/examples/ipsec-secgw/esp.c
@@ -139,7 +139,7 @@ esp4_tunnel_inbound_post_crypto(struct rte_mbuf *m, struct ipsec_sa *sa,
 
        padding = pad_len - *pad_len;
        for (i = 0; i < *pad_len; i++) {
-               if (padding[i] != i) {
+               if (padding[i] != i + 1) {
                        RTE_LOG(ERR, IPSEC_ESP, "invalid pad_len field\n");
                        return -EINVAL;
                }