[Qemu-devel] [RFC PATCH 4/6] hw/net/vmxnet3: Use the tcp_header structure

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

The tcp_header structure comes convenient macros to avoid
manipulating the TCP header flags/offset bits manually.
Replace the tcp_hdr structure by the tcp_header equivalent,
and use the macros.

Since we will remove the duplicated TCP_FLAG_ACK definition
in the next commit, replace its use now.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
RFC: Verify th_off endianess

 hw/net/net_rx_pkt.c | 2 +-
 hw/net/net_tx_pkt.c | 7 ++++---
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/hw/net/net_rx_pkt.c b/hw/net/net_rx_pkt.c
index 98a5030ace..7558f0646a 100644
--- a/hw/net/net_rx_pkt.c
+++ b/hw/net/net_rx_pkt.c
@@ -376,7 +376,7 @@ bool net_rx_pkt_is_tcp_ack(struct NetRxPkt *pkt)
     assert(pkt);
 
     if (pkt->istcp) {
-        return TCP_HEADER_FLAGS(&pkt->l4hdr_info.hdr.tcp) & TCP_FLAG_ACK;
+        return TCP_HEADER_FLAGS(&pkt->l4hdr_info.hdr.tcp) & TH_ACK;
     }
 
     return false;
diff --git a/hw/net/net_tx_pkt.c b/hw/net/net_tx_pkt.c
index 162f802dd7..fc4514416c 100644
--- a/hw/net/net_tx_pkt.c
+++ b/hw/net/net_tx_pkt.c
@@ -307,7 +307,7 @@ func_exit:
 void net_tx_pkt_build_vheader(struct NetTxPkt *pkt, bool tso_enable,
     bool csum_enable, uint32_t gso_size)
 {
-    struct tcp_hdr l4hdr;
+    struct tcp_header l4hdr;
     assert(pkt);
 
     /* csum has to be enabled if tso is. */
@@ -330,7 +330,8 @@ void net_tx_pkt_build_vheader(struct NetTxPkt *pkt, bool tso_enable,
     case VIRTIO_NET_HDR_GSO_TCPV6:
         iov_to_buf(&pkt->vec[NET_TX_PKT_PL_START_FRAG], pkt->payload_frags,
                    0, &l4hdr, sizeof(l4hdr));
-        pkt->virt_hdr.hdr_len = pkt->hdr_len + l4hdr.th_off * sizeof(uint32_t);
+        pkt->virt_hdr.hdr_len = pkt->hdr_len
+                            + TCP_HEADER_DATA_OFFSET(&l4hdr) * sizeof(uint32_t);
         pkt->virt_hdr.gso_size = gso_size;
         break;
 
@@ -343,7 +344,7 @@ void net_tx_pkt_build_vheader(struct NetTxPkt *pkt, bool tso_enable,
         case IP_PROTO_TCP:
             pkt->virt_hdr.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
             pkt->virt_hdr.csum_start = pkt->hdr_len;
-            pkt->virt_hdr.csum_offset = offsetof(struct tcp_hdr, th_sum);
+            pkt->virt_hdr.csum_offset = offsetof(struct tcp_header, th_sum);
             break;
         case IP_PROTO_UDP:
             pkt->virt_hdr.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
-- 
2.20.1