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6324bd9389
Some PXE stacks (observed with a QLogic 8242) will always try to prepend a link-layer header, even if the caller uses P_UNKNOWN to indicate that the link-layer header has already been filled in. This results in an invalid packet being transmitted. Work around these faulty PXE stacks where possible by stripping the existing link-layer header and allowing the PXE stack to (re)construct the link-layer header itself. Originally-fixed-by: Buck Huppmann <buckh@pobox.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
#ifndef _IPXE_ETHERNET_H
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#define _IPXE_ETHERNET_H
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/** @file
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*
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* Ethernet protocol
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*
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*/
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FILE_LICENCE ( GPL2_OR_LATER );
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#include <stdint.h>
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#include <ipxe/netdevice.h>
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#include <ipxe/iobuf.h>
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/**
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* Check if Ethernet address is all zeroes
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*
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* @v addr Ethernet address
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* @ret is_zero Address is all zeroes
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*/
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static inline int is_zero_ether_addr ( const void *addr ) {
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const uint8_t *addr_bytes = addr;
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return ( ! ( addr_bytes[0] | addr_bytes[1] | addr_bytes[2] |
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addr_bytes[3] | addr_bytes[4] | addr_bytes[5] ) );
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}
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/**
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* Check if Ethernet address is a multicast address
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*
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* @v addr Ethernet address
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* @ret is_mcast Address is a multicast address
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*
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* Note that the broadcast address is also a multicast address.
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*/
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static inline int is_multicast_ether_addr ( const void *addr ) {
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const uint8_t *addr_bytes = addr;
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return ( addr_bytes[0] & 0x01 );
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}
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/**
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* Check if Ethernet address is locally assigned
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*
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* @v addr Ethernet address
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* @ret is_local Address is locally assigned
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*/
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static inline int is_local_ether_addr ( const void *addr ) {
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const uint8_t *addr_bytes = addr;
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return ( addr_bytes[0] & 0x02 );
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}
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/**
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* Check if Ethernet address is the broadcast address
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*
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* @v addr Ethernet address
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* @ret is_bcast Address is the broadcast address
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*/
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static inline int is_broadcast_ether_addr ( const void *addr ) {
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const uint8_t *addr_bytes = addr;
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return ( ( addr_bytes[0] & addr_bytes[1] & addr_bytes[2] &
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addr_bytes[3] & addr_bytes[4] & addr_bytes[5] ) == 0xff );
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}
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/**
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* Check if Ethernet address is valid
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*
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* @v addr Ethernet address
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* @ret is_valid Address is valid
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*
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* Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is
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* not a multicast address, and is not ff:ff:ff:ff:ff:ff.
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*/
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static inline int is_valid_ether_addr ( const void *addr ) {
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return ( ( ! is_multicast_ether_addr ( addr ) ) &&
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( ! is_zero_ether_addr ( addr ) ) );
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}
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extern int eth_push ( struct net_device *netdev, struct io_buffer *iobuf,
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const void *ll_dest, const void *ll_source,
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uint16_t net_proto );
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extern int eth_pull ( struct net_device *netdev, struct io_buffer *iobuf,
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const void **ll_dest, const void **ll_source,
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uint16_t *net_proto, unsigned int *flags );
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extern void eth_init_addr ( const void *hw_addr, void *ll_addr );
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extern const char * eth_ntoa ( const void *ll_addr );
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extern int eth_mc_hash ( unsigned int af, const void *net_addr,
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void *ll_addr );
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extern int eth_eth_addr ( const void *ll_addr, void *eth_addr );
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extern struct net_device * alloc_etherdev ( size_t priv_size );
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#endif /* _IPXE_ETHERNET_H */
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