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examples/l2fwd-crypto: fix packet length while decryption

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There were some padding left when a packet gets decrypted. This
patch removes those padding.
This patch also removes the padding left after verifying auth of
the packet.

Fixes: e2cdfbd07c8a ("examples/l2fwd-crypto: fix port id type")
Cc: stable@dpdk.org

Signed-off-by: Rohit Raj <rohit.raj@nxp.com>
Acked-by: Akhil Goyal <gakhil@marvell.com>
This commit is contained in:
Rohit Raj 2021-04-09 18:44:59 +05:30 committed by Akhil Goyal
parent 58266cc91e
commit 62c0b4484c
1 changed files with 14 additions and 0 deletions
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14
examples/l2fwd-crypto/main.c
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@ -616,12 +616,26 @@ l2fwd_simple_forward(struct rte_mbuf *m, uint16_t portid,
struct l2fwd_crypto_options *options)
{
uint16_t dst_port;
uint32_t pad_len;
struct rte_ipv4_hdr *ip_hdr;
uint32_t ipdata_offset = sizeof(struct rte_ether_hdr);
ip_hdr = (struct rte_ipv4_hdr *)(rte_pktmbuf_mtod(m, char *) +
ipdata_offset);
dst_port = l2fwd_dst_ports[portid];
if (options->mac_updating)
l2fwd_mac_updating(m, dst_port);
if (options->auth_xform.auth.op == RTE_CRYPTO_AUTH_OP_VERIFY)
rte_pktmbuf_trim(m, options->auth_xform.auth.digest_length);
if (options->cipher_xform.cipher.op == RTE_CRYPTO_CIPHER_OP_DECRYPT) {
pad_len = m->pkt_len - rte_be_to_cpu_16(ip_hdr->total_length) -
ipdata_offset;
rte_pktmbuf_trim(m, pad_len);
}
l2fwd_send_packet(m, dst_port);
}