ethernet_input: If you are not using a threaded environment and the driver should use ARP (such as for an Ethernet device), the driver will call this function which permits ARP packets to be handled, as well as IP packets.This parameter typically takes one of the following values: The final parameter input is the function that a driver will call when it has received a new packet. This parameter may be NULL if the driver has already been initialized in your code elsewhere. The init parameter specifies a driver-initialization function that should be called once the netif structure has been prepared by netif_add. Some drivers may require the state variable to be set prior to calling netif_add, but many require this argument to be NULL. State is a driver-specific structure that defines any other "state" information necessary for the driver to function. The user specifies an IP address for the interface, its net mask, and gateway address (see IP stack for more details). Struct ip_addr *gw, void *state, err_t (* init)(struct netif *netif),Įrr_t (* input)(struct pbuf *p, struct netif *netif)) Struct *netif netif_add(struct netif *mynetif, struct ip_addr *ipaddr, struct ip_addr *netmask, ![]() To create a new network interface, the user allocates space for a new struct netif (but does not initialize any part of it) and calls netif_add: ![]() Starting a network interface Step One: Add the interface
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