d0e01bb3fc
The API for neighbour_tx() allows for an explicit source link-layer address, but this will be ignored if the packet is deferred for transmission after completion of neighbour discovery. The network device's own link-layer address will always be used when sending neighbour discovery packets, and when sending any deferred packets after discovery completes. All callers pass in the network device's own link-layer address as the source address anyway, and so this explicit source link-layer address is never used for any meaningful purpose. Simplify the neighbour_tx() API by removing the ability to pass in an explicit source link-layer address. Signed-off-by: Michael Brown <mcb30@ipxe.org>
63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
#ifndef _IPXE_ARP_H
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#define _IPXE_ARP_H
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/** @file
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*
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* Address Resolution Protocol
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*
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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#include <ipxe/tables.h>
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#include <ipxe/netdevice.h>
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#include <ipxe/neighbour.h>
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/** A network-layer protocol that relies upon ARP */
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struct arp_net_protocol {
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/** Network-layer protocol */
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struct net_protocol *net_protocol;
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/** Check existence of address
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*
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* @v netdev Network device
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* @v net_addr Network-layer address
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* @ret rc Return status code
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*/
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int ( * check ) ( struct net_device *netdev,
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const void *net_addr );
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};
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/** ARP protocol table */
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#define ARP_NET_PROTOCOLS \
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__table ( struct arp_net_protocol, "arp_net_protocols" )
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/** Declare an ARP protocol */
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#define __arp_net_protocol __table_entry ( ARP_NET_PROTOCOLS, 01 )
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extern struct net_protocol arp_protocol __net_protocol;
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extern struct neighbour_discovery arp_discovery;
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/**
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* Transmit packet, determining link-layer address via ARP
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*
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* @v iobuf I/O buffer
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* @v netdev Network device
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* @v net_protocol Network-layer protocol
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* @v net_dest Destination network-layer address
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* @v net_source Source network-layer address
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* @ret rc Return status code
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*/
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static inline int arp_tx ( struct io_buffer *iobuf, struct net_device *netdev,
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struct net_protocol *net_protocol,
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const void *net_dest, const void *net_source ) {
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return neighbour_tx ( iobuf, netdev, net_protocol, net_dest,
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&arp_discovery, net_source );
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}
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extern int arp_tx_request ( struct net_device *netdev,
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struct net_protocol *net_protocol,
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const void *net_dest, const void *net_source );
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#endif /* _IPXE_ARP_H */
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