[PATCH v5 10/11] examples/ptpclient: 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/ptpclient/ptpclient.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/examples/ptpclient/ptpclient.c b/examples/ptpclient/ptpclient.c
index cdf2da64dfee..2535d848a1e9 100644
--- a/examples/ptpclient/ptpclient.c
+++ b/examples/ptpclient/ptpclient.c
@@ -354,8 +354,8 @@ parse_sync(struct ptpv2_data_slave_ordinary *ptp_data, 
uint16_t rx_tstamp_idx)
 {
        struct ptp_header *ptp_hdr;
 
-       ptp_hdr = (struct ptp_header *)(rte_pktmbuf_mtod(ptp_data->m, char *)
-                       + sizeof(struct rte_ether_hdr));
+       ptp_hdr = rte_pktmbuf_mtod_offset(ptp_data->m, struct ptp_header *,
+                                         sizeof(struct rte_ether_hdr));
        ptp_data->seqID_SYNC = rte_be_to_cpu_16(ptp_hdr->seq_id);
 
        if (ptp_data->ptpset == 0) {
@@ -397,15 +397,15 @@ parse_fup(struct ptpv2_data_slave_ordinary *ptp_data)
        int ret;
 
        eth_hdr = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
-       ptp_hdr = (struct ptp_header *)(rte_pktmbuf_mtod(m, char *)
-                       + sizeof(struct rte_ether_hdr));
+       ptp_hdr = rte_pktmbuf_mtod_offset(m, struct ptp_header *,
+                                         sizeof(struct rte_ether_hdr));
        if (memcmp(&ptp_data->master_clock_id,
                        &ptp_hdr->source_port_id.clock_id,
                        sizeof(struct clock_id)) != 0)
                return;
 
        ptp_data->seqID_FOLLOWUP = rte_be_to_cpu_16(ptp_hdr->seq_id);
-       ptp_msg = (struct ptp_message *) (rte_pktmbuf_mtod(m, char *) +
+       ptp_msg = rte_pktmbuf_mtod_offset(m, struct ptp_message *,
                                          sizeof(struct rte_ether_hdr));
 
        origin_tstamp = &ptp_msg->follow_up.precise_origin_tstamp;
@@ -537,8 +537,8 @@ parse_drsp(struct ptpv2_data_slave_ordinary *ptp_data)
        struct tstamp *rx_tstamp;
        uint16_t seq_id;
 
-       ptp_msg = (struct ptp_message *) (rte_pktmbuf_mtod(m, char *) +
-                                       sizeof(struct rte_ether_hdr));
+       ptp_msg = rte_pktmbuf_mtod_offset(m, struct ptp_message *,
+                                         sizeof(struct rte_ether_hdr));
        seq_id = rte_be_to_cpu_16(ptp_msg->delay_resp.hdr.seq_id);
        if (memcmp(&ptp_data->client_clock_id,
                   &ptp_msg->delay_resp.req_port_id.clock_id,
@@ -585,8 +585,8 @@ parse_ptp_frames(uint16_t portid, struct rte_mbuf *m) {
        if (eth_type == PTP_PROTOCOL) {
                ptp_data.m = m;
                ptp_data.portid = portid;
-               ptp_hdr = (struct ptp_header *)(rte_pktmbuf_mtod(m, char *)
-                                       + sizeof(struct rte_ether_hdr));
+               ptp_hdr = rte_pktmbuf_mtod_offset(m, struct ptp_header *,
+                                                 sizeof(struct rte_ether_hdr));
 
                switch (ptp_hdr->msg_type) {
                case SYNC:
-- 
2.39.2