[PATCH v4 11/11] examples/l2fwd-crypto: use rte_pktmbuf_mtod_offset

[Stephen Hemminger]

Replace explicit packet offset computations with rte_pktmbuf_mtod_offset().

Signed-off-by: Stephen Hemminger <step...@networkplumber.org>
---
 examples/l2fwd-crypto/main.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/examples/l2fwd-crypto/main.c b/examples/l2fwd-crypto/main.c
index efe7eea2a768..981b449710a7 100644
--- a/examples/l2fwd-crypto/main.c
+++ b/examples/l2fwd-crypto/main.c
@@ -410,8 +410,8 @@ l2fwd_simple_crypto_enqueue(struct rte_mbuf *m,
 
        ipdata_offset = sizeof(struct rte_ether_hdr);
 
-       ip_hdr = (struct rte_ipv4_hdr *)(rte_pktmbuf_mtod(m, char *) +
-                       ipdata_offset);
+       ip_hdr = rte_pktmbuf_mtod_offset(m, struct rte_ipv4_hdr *,
+                                        ipdata_offset);
 
        ipdata_offset += (ip_hdr->version_ihl & RTE_IPV4_HDR_IHL_MASK)
                        * RTE_IPV4_IHL_MULTIPLIER;
@@ -479,8 +479,9 @@ l2fwd_simple_crypto_enqueue(struct rte_mbuf *m,
                        op->sym->auth.digest.data = (uint8_t 
*)rte_pktmbuf_append(m,
                                cparams->digest_length);
                } else {
-                       op->sym->auth.digest.data = rte_pktmbuf_mtod(m,
-                               uint8_t *) + ipdata_offset + data_len;
+                       op->sym->auth.digest.data = rte_pktmbuf_mtod_offset(m,
+                                                                           
uint8_t *,
+                                                                           
ipdata_offset + data_len);
                }
 
                op->sym->auth.digest.phys_addr = rte_pktmbuf_iova_offset(m,
@@ -540,8 +541,9 @@ l2fwd_simple_crypto_enqueue(struct rte_mbuf *m,
                        op->sym->aead.digest.data = (uint8_t 
*)rte_pktmbuf_append(m,
                                cparams->digest_length);
                } else {
-                       op->sym->aead.digest.data = rte_pktmbuf_mtod(m,
-                               uint8_t *) + ipdata_offset + data_len;
+                       op->sym->aead.digest.data = rte_pktmbuf_mtod_offset(m,
+                                                                           
uint8_t *,
+                                                                           
ipdata_offset + data_len);
                }
 
                op->sym->aead.digest.phys_addr = rte_pktmbuf_iova_offset(m,
@@ -631,7 +633,7 @@ l2fwd_simple_forward(struct rte_mbuf *m, uint16_t portid,
        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 *) +
+       ip_hdr = rte_pktmbuf_mtod_offset(m, struct rte_ipv4_hdr *,
                                         ipdata_offset);
        dst_port = l2fwd_dst_ports[portid];
 
-- 
2.39.2