例如如下这个函数(lwip源码)
[mw_shl_code=c,true]/**
* Processes ICMP input packets, called from ip_input().
*
* Currently only processes icmp echo requests and sends
* out the echo response.
*
* @param p the icmp echo request packet, p->payload pointing to the ip header
* @param inp the netif on which this packet was received
*/
void
icmp_input(struct pbuf *p, struct netif *inp)[/mw_shl_code]
这里的p->payload pointing to IP头部.
问题:请问大神:那以太网头部如何加进去