proto: update ethernet protocol to add timestamps

proto/cosim_eth_proto.h

@@ -58,20 +58,25 @@ struct cosim_eth_proto_net_intro {
 #define COSIM_ETH_PROTO_D2N_MSG_SEND 0x2
 
 struct cosim_eth_proto_d2n_dummy {
-    uint8_t pad[63];
+    uint8_t pad[48];
+    uint64_t timestamp;
+    uint8_t pad_[7];
     uint8_t own_type;
 } __attribute__((packed));
 
 struct cosim_eth_proto_d2n_sync {
+    uint8_t pad[48];
     uint64_t timestamp;
-    uint8_t pad[55];
+    uint8_t pad_[7];
     uint8_t own_type;
 } __attribute__((packed));
 
 struct cosim_eth_proto_d2n_send {
     uint16_t len;
     uint8_t port;
-    uint8_t pad[60];
+    uint8_t pad[45];
+    uint64_t timestamp;
+    uint8_t pad_[7];
     uint8_t own_type;
     uint8_t data[];
 } __attribute__((packed));
@@ -97,20 +102,25 @@ union cosim_eth_proto_d2n {
 #define COSIM_ETH_PROTO_N2D_MSG_RECV 0x2
 
 struct cosim_eth_proto_n2d_dummy {
-    uint8_t pad[63];
+    uint8_t pad[48];
+    uint64_t timestamp;
+    uint8_t pad_[7];
     uint8_t own_type;
 } __attribute__((packed));
 
 struct cosim_eth_proto_n2d_sync {
+    uint8_t pad[48];
     uint64_t timestamp;
-    uint8_t pad[55];
+    uint8_t pad_[7];
     uint8_t own_type;
 } __attribute__((packed));
 
 struct cosim_eth_proto_n2d_recv {
     uint16_t len;
     uint8_t port;
-    uint8_t pad[60];
+    uint8_t pad[45];
+    uint64_t timestamp;
+    uint8_t pad_[7];
     uint8_t own_type;
     uint8_t data[];
 };