C 指向另一个结构体的指针

Question

我目前正在阅读一些数据包发送的源代码。对于下面的伪代码，对于“packet->packet2 = (char*) data”这一行，它实际上意味着什么？我可以理解为将变量数据中的字符数据类型存储到packet2中，它也被定义为字符数据类型吗？

struct Node1
{
    char packet1;
    int num1;
}

struct Node2
{
   char *packet2;
   int num2;
}

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

   struct Node2 *packet;
   struct node2 var2;

   data = &var1;
   packet = &var2;

   packet->packet2 = (char*) data;
}     

Answer 1

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;
}