Proxy ARP Support

Introduction

Functions
int32_t	EthFwArp_getHwAddr (const ip4_addr_t *ipAddr, struct eth_addr *hwAddr, uint16_t vlanId)
	Get MAC address corresponding to a registered client's IPv4 address. More...
void	EthFwArp_sendRaw (struct netif *netif, const struct eth_addr *ethSrcAddr, const struct eth_addr *ethDstAddr, const struct eth_addr *hwSrcAddr, const ip4_addr_t *ipSrcAddr, const struct eth_addr *hwDstAddr, const ip4_addr_t *ipDstAddr, uint16_t vlanId, const u16_t opcode)
	Sends ARP response on behalf of a registered remote client. More...

Function Documentation

EthFwArp_getHwAddr()

int32_t EthFwArp_getHwAddr	(	const ip4_addr_t *	ipAddr,
		struct eth_addr *	hwAddr,
		uint16_t	vlanId
	)

Get MAC address corresponding to a registered client's IPv4 address.

Get the MAC address of a remote client that has previously registered its MAC address and IPv4 address with Ethernet Firmware through ETHREMOTECFG_CMD_REGISTER_IPv4 command.

Parameters

ipAddr	IPv4 address
hwAddr	MAC address corresponding to the IPv4 (if registered)
vlanId	VLAN id

Returns

ETHFW_SOK if IPv4 address was registered, or a negative error code otherwise.

EthFwArp_sendRaw()

void EthFwArp_sendRaw	(	struct netif *	netif,
		const struct eth_addr *	ethSrcAddr,
		const struct eth_addr *	ethDstAddr,
		const struct eth_addr *	hwSrcAddr,
		const ip4_addr_t *	ipSrcAddr,
		const struct eth_addr *	hwDstAddr,
		const ip4_addr_t *	ipDstAddr,
		uint16_t	vlanId,
		const u16_t	opcode
	)

Sends ARP response on behalf of a registered remote client.

Sends an ARP response on behalf of a remote client that has previously registers its MAC address and IPv4 address with Ethernet Firmware through ETHREMOTECFG_CMD_REGISTER_IPv4 command.

This function is based on lwIP's etharp_raw().

Parameters

netif	Enet netif on which ARP response will be sent
ethSrcAddr	Source MAC address for the Ethernet header
ethDstAddr	Destination MAC address for the Ethernet header
hwSrcAddr	Source MAC address for the ARP protocol header
ipSrcAddr	Source IP address for the ARP protocol header
hwDstAddr	Destination MAC address for the ARP protocol header
ipDstAddr	Destination IP address for the ARP protocol header
vlanId	VLAN id
opcode	Type of the ARP packet