浅析lwip网络接口卡是如何添加的

浅析lwip网络接口卡是如何添加的

/**
 * Call netif_add() in a thread-safe way by running that function inside the
 * tcpip_thread context.
 *
 * @note for params @see netif_add()
 */
err_t
netifapi_netif_add(struct netif *netif,
                   struct ip_addr *ipaddr,
                   struct ip_addr *netmask,
                   struct ip_addr *gw,
                   void *state,
                   err_t (* init)(struct netif *netif),
                   err_t (* input)(struct pbuf *p, struct netif *netif))
向tcpip_thread线程发送id为TCPIP_MSG_NETIFAPI的mbox邮箱消息[luther.gliethttp
然后tcpip_thread线程将进一步调用netifapi_netif_add()函数中赋值的.function = do_netifapi_netif_add;
这样do_netifapi_netif_add==>netif_add()函数将实现网卡的添加工作[luther.gliethttp].

/** Generic data structure used for all lwIP network interfaces.
 *  The following fields should be filled in by the initialization
 *  function for the device driver: hwaddr_len, hwaddr[], mtu, flags */
struct netif {
    ....
};

所以