tests/qtest/e1000e-test: Fabricate ethernet header

e1000e understands ethernet header so fabricate something convincing.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

tests/qtest/e1000e-test.c

@@ -27,6 +27,7 @@
 #include "qemu/osdep.h"
 #include "libqtest-single.h"
 #include "libqos/pci-pc.h"
+#include "net/eth.h"
 #include "qemu/sockets.h"
 #include "qemu/iov.h"
 #include "qemu/module.h"
@@ -35,9 +36,13 @@
 #include "libqos/e1000e.h"
 #include "hw/net/e1000_regs.h"
 
+static const struct eth_header packet = {
+    .h_dest = E1000E_ADDRESS,
+    .h_source = E1000E_ADDRESS,
+};
+
 static void e1000e_send_verify(QE1000E *d, int *test_sockets, QGuestAllocator *alloc)
 {
-    static const char test[] = "TEST";
     struct e1000_tx_desc descr;
     char buffer[64];
     int ret;
@@ -45,7 +50,7 @@ static void e1000e_send_verify(QE1000E *d, int *test_sockets, QGuestAllocator *a
 
     /* Prepare test data buffer */
     uint64_t data = guest_alloc(alloc, sizeof(buffer));
-    memwrite(data, test, sizeof(test));
+    memwrite(data, &packet, sizeof(packet));
 
     /* Prepare TX descriptor */
     memset(&descr, 0, sizeof(descr));
@@ -71,7 +76,7 @@ static void e1000e_send_verify(QE1000E *d, int *test_sockets, QGuestAllocator *a
     g_assert_cmpint(ret, == , sizeof(recv_len));
     ret = recv(test_sockets[0], buffer, sizeof(buffer), 0);
     g_assert_cmpint(ret, ==, sizeof(buffer));
-    g_assert_cmpstr(buffer, == , test);
+    g_assert_false(memcmp(buffer, &packet, sizeof(packet)));
 
     /* Free test data buffer */
     guest_free(alloc, data);
@@ -81,15 +86,15 @@ static void e1000e_receive_verify(QE1000E *d, int *test_sockets, QGuestAllocator
 {
     union e1000_rx_desc_extended descr;
 
-    char test[] = "TEST";
-    int len = htonl(sizeof(test));
+    struct eth_header test_iov = packet;
+    int len = htonl(sizeof(packet));
     struct iovec iov[] = {
         {
             .iov_base = &len,
             .iov_len = sizeof(len),
         },{
-            .iov_base = test,
-            .iov_len = sizeof(test),
+            .iov_base = &test_iov,
+            .iov_len = sizeof(packet),
         },
     };
 
@@ -97,8 +102,8 @@ static void e1000e_receive_verify(QE1000E *d, int *test_sockets, QGuestAllocator
     int ret;
 
     /* Send a dummy packet to device's socket*/
-    ret = iov_send(test_sockets[0], iov, 2, 0, sizeof(len) + sizeof(test));
-    g_assert_cmpint(ret, == , sizeof(test) + sizeof(len));
+    ret = iov_send(test_sockets[0], iov, 2, 0, sizeof(len) + sizeof(packet));
+    g_assert_cmpint(ret, == , sizeof(packet) + sizeof(len));
 
     /* Prepare test data buffer */
     uint64_t data = guest_alloc(alloc, sizeof(buffer));
@@ -119,7 +124,7 @@ static void e1000e_receive_verify(QE1000E *d, int *test_sockets, QGuestAllocator
 
     /* Check data sent to the backend */
     memread(data, buffer, sizeof(buffer));
-    g_assert_cmpstr(buffer, == , test);
+    g_assert_false(memcmp(buffer, &packet, sizeof(packet)));
 
     /* Free test data buffer */
     guest_free(alloc, data);

tests/qtest/libqos/e1000e.h

@@ -25,6 +25,8 @@
 #define E1000E_RX0_MSG_ID           (0)
 #define E1000E_TX0_MSG_ID           (1)
 
+#define E1000E_ADDRESS { 0x52, 0x54, 0x00, 0x12, 0x34, 0x56 }
+
 typedef struct QE1000E QE1000E;
 typedef struct QE1000E_PCI QE1000E_PCI;