C pointer to another struct

struct Node1
{
    Node2*/or Node1*.... packet1;
    int num1;
}

struct Node2
{
   Node1* packet2;
   int num2;
}

int main(void)
{
   struct Node1 *data;
   struct Node1 var1;

   struct Node2 *packet;
   struct Node2 var2;

   data = &var1;
   packet = &var2;

   packet->packet2 =  data;
}