diff options
| -rw-r--r-- | hw/e1000.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/hw/e1000.c b/hw/e1000.c index b65a74fe9e..8566fe3276 100644 --- a/hw/e1000.c +++ b/hw/e1000.c @@ -89,6 +89,7 @@ typedef struct E1000State_st { struct e1000_tx { unsigned char header[256]; unsigned char vlan_header[4]; + /* Fields vlan and data must not be reordered or separated. */ unsigned char vlan[4]; unsigned char data[0x10000]; uint16_t size; @@ -383,7 +384,8 @@ xmit_seg(E1000State *s) if (tp->sum_needed & E1000_TXD_POPTS_IXSM) putsum(tp->data, tp->size, tp->ipcso, tp->ipcss, tp->ipcse); if (tp->vlan_needed) { - memmove(tp->vlan, tp->data, 12); + memmove(tp->vlan, tp->data, 4); + memmove(tp->data, tp->data + 4, 8); memcpy(tp->data + 8, tp->vlan_header, 4); qemu_send_packet(&s->nic->nc, tp->vlan, tp->size + 4); } else |