铸造错误：左值要求作为分配的左操作数 [英] Casting Error: lvalue required as left operand of assignment

问题描述

所以我试图用 ether_aton（）返回一个结构ether_addr * 。结果
我试图把它放在我的结构ether_header * EPTR （净/ ethernet.h），它具有 ether_shost 成员。我想这样的：

So I'm trying to use ether_aton() which returns a struct ether_addr *.
I'm trying to put this in my struct ether_header *eptr (from net/ethernet.h) which has the ether_shost member. I tried this:

 struct ether_header *eptr;  /* net/ethernet.h */
 ... 
 (struct ether_addr*)(eptr->ether_shost) = ether_aton(SRC_ETHER_ADDR);

这给了我错误：因分配的左操作数左值

我知道，我只是无法正常投它，但无法弄清楚如何。

I know I'm just not casting it correctly, but can't figure out how.

编辑：
最终得到它。感谢您的帮助球员。

Ended up getting it. Thanks for the help guys.

struct ether_addr* eth_addr = ether_aton(SRC_ETHER_ADDR);
int i;  
for(i=0; i<6; i++)
    eptr->ether_shost[i] = eth_addr->ether_addr_octet[i];

就不得不单独分配每个字节的。

Just had to assign each of the octet individually.

推荐答案

您不能施放赋值运算符的左操作数的温度。

You cannot cast the left operand of the assignment operator in C.

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