2 * LiMon Monitor (LiMon) - Network.
4 * Copyright 1994 - 2000 Neil Russell.
6 * SPDX-License-Identifier: GPL-2.0
9 * 9/16/00 bor adapted to TQM823L/STK8xxL board, RARP/TFTP boot added
15 #if defined(CONFIG_8xx)
17 #endif /* CONFIG_8xx */
19 #include <asm/cache.h>
20 #include <asm/byteorder.h> /* for nton* / ntoh* stuff */
22 #define DEBUG_LL_STATE 0 /* Link local state machine changes */
23 #define DEBUG_DEV_PKT 0 /* Packets or info directed to the device */
24 #define DEBUG_NET_PKT 0 /* Packets on info on the network at large */
25 #define DEBUG_INT_STATE 0 /* Internal network state changes */
28 * The number of receive packet buffers, and the required packet buffer
29 * alignment in memory.
33 #ifdef CONFIG_SYS_RX_ETH_BUFFER
34 # define PKTBUFSRX CONFIG_SYS_RX_ETH_BUFFER
39 #define PKTALIGN ARCH_DMA_MINALIGN
41 /* IPv4 addresses are always 32 bits in size */
47 * An incoming packet handler.
48 * @param pkt pointer to the application packet
49 * @param dport destination UDP port
50 * @param sip source IP address
51 * @param sport source UDP port
52 * @param len packet length
54 typedef void rxhand_f(uchar
*pkt
, unsigned dport
,
55 struct in_addr sip
, unsigned sport
,
59 * An incoming ICMP packet handler.
60 * @param type ICMP type
61 * @param code ICMP code
62 * @param dport destination UDP port
63 * @param sip source IP address
64 * @param sport source UDP port
65 * @param pkt pointer to the ICMP packet data
66 * @param len packet length
68 typedef void rxhand_icmp_f(unsigned type
, unsigned code
, unsigned dport
,
69 struct in_addr sip
, unsigned sport
, uchar
*pkt
, unsigned len
);
72 * A timeout handler. Called after time interval has expired.
74 typedef void thand_f(void);
84 * struct eth_pdata - Platform data for Ethernet MAC controllers
86 * @iobase: The base address of the hardware registers
87 * @enetaddr: The Ethernet MAC address that is loaded from EEPROM or env
88 * @phy_interface: PHY interface to use - see PHY_INTERFACE_MODE_...
92 unsigned char enetaddr
[6];
98 * Check hardware device for new packets (otherwise only return those
99 * which are already in the memory buffer ready to process)
101 ETH_RECV_CHECK_DEVICE
= 1 << 0,
105 * struct eth_ops - functions of Ethernet MAC controllers
107 * start: Prepare the hardware to send and receive packets
108 * send: Send the bytes passed in "packet" as a packet on the wire
109 * recv: Check if the hardware received a packet. If so, set the pointer to the
110 * packet buffer in the packetp parameter. If not, return an error or 0 to
111 * indicate that the hardware receive FIFO is empty. If 0 is returned, the
112 * network stack will not process the empty packet, but free_pkt() will be
114 * free_pkt: Give the driver an opportunity to manage its packet buffer memory
115 * when the network stack is finished processing it. This will only be
116 * called when no error was returned from recv - optional
117 * stop: Stop the hardware from looking for packets - may be called even if
119 * mcast: Join or leave a multicast group (for TFTP) - optional
120 * write_hwaddr: Write a MAC address to the hardware (used to pass it to Linux
121 * on some platforms like ARM). This function expects the
122 * eth_pdata::enetaddr field to be populated. The method can
123 * return -ENOSYS to indicate that this is not implemented for
124 this hardware - optional.
125 * read_rom_hwaddr: Some devices have a backup of the MAC address stored in a
126 * ROM on the board. This is how the driver should expose it
127 * to the network stack. This function should fill in the
128 * eth_pdata::enetaddr field - optional
131 int (*start
)(struct udevice
*dev
);
132 int (*send
)(struct udevice
*dev
, void *packet
, int length
);
133 int (*recv
)(struct udevice
*dev
, int flags
, uchar
**packetp
);
134 int (*free_pkt
)(struct udevice
*dev
, uchar
*packet
, int length
);
135 void (*stop
)(struct udevice
*dev
);
136 #ifdef CONFIG_MCAST_TFTP
137 int (*mcast
)(struct udevice
*dev
, const u8
*enetaddr
, int join
);
139 int (*write_hwaddr
)(struct udevice
*dev
);
140 int (*read_rom_hwaddr
)(struct udevice
*dev
);
143 #define eth_get_ops(dev) ((struct eth_ops *)(dev)->driver->ops)
145 struct udevice
*eth_get_dev(void); /* get the current device */
147 * The devname can be either an exact name given by the driver or device tree
148 * or it can be an alias of the form "eth%d"
150 struct udevice
*eth_get_dev_by_name(const char *devname
);
151 unsigned char *eth_get_ethaddr(void); /* get the current device MAC */
153 /* Used only when NetConsole is enabled */
154 int eth_is_active(struct udevice
*dev
); /* Test device for active state */
155 int eth_init_state_only(void); /* Set active state */
156 void eth_halt_state_only(void); /* Set passive state */
159 #ifndef CONFIG_DM_ETH
162 unsigned char enetaddr
[6];
166 int (*init
)(struct eth_device
*, bd_t
*);
167 int (*send
)(struct eth_device
*, void *packet
, int length
);
168 int (*recv
)(struct eth_device
*);
169 void (*halt
)(struct eth_device
*);
170 #ifdef CONFIG_MCAST_TFTP
171 int (*mcast
)(struct eth_device
*, const u8
*enetaddr
, u8 set
);
173 int (*write_hwaddr
)(struct eth_device
*);
174 struct eth_device
*next
;
179 int eth_register(struct eth_device
*dev
);/* Register network device */
180 int eth_unregister(struct eth_device
*dev
);/* Remove network device */
182 extern struct eth_device
*eth_current
;
184 static __always_inline
struct eth_device
*eth_get_dev(void)
188 struct eth_device
*eth_get_dev_by_name(const char *devname
);
189 struct eth_device
*eth_get_dev_by_index(int index
); /* get dev @ index */
191 /* get the current device MAC */
192 static inline unsigned char *eth_get_ethaddr(void)
195 return eth_current
->enetaddr
;
199 /* Used only when NetConsole is enabled */
200 int eth_is_active(struct eth_device
*dev
); /* Test device for active state */
201 /* Set active state */
202 static __always_inline
int eth_init_state_only(void)
204 eth_get_dev()->state
= ETH_STATE_ACTIVE
;
208 /* Set passive state */
209 static __always_inline
void eth_halt_state_only(void)
211 eth_get_dev()->state
= ETH_STATE_PASSIVE
;
215 * Set the hardware address for an ethernet interface based on 'eth%daddr'
216 * environment variable (or just 'ethaddr' if eth_number is 0).
218 * base_name - base name for device (normally "eth")
219 * eth_number - value of %d (0 for first device of this type)
221 * 0 is success, non-zero is error status from driver.
223 int eth_write_hwaddr(struct eth_device
*dev
, const char *base_name
,
226 int usb_eth_initialize(bd_t
*bi
);
229 int eth_initialize(void); /* Initialize network subsystem */
230 void eth_try_another(int first_restart
); /* Change the device */
231 void eth_set_current(void); /* set nterface to ethcur var */
233 int eth_get_dev_index(void); /* get the device index */
234 void eth_parse_enetaddr(const char *addr
, uchar
*enetaddr
);
235 int eth_getenv_enetaddr(const char *name
, uchar
*enetaddr
);
236 int eth_setenv_enetaddr(const char *name
, const uchar
*enetaddr
);
239 * Get the hardware address for an ethernet interface .
241 * base_name - base name for device (normally "eth")
242 * index - device index number (0 for first)
243 * enetaddr - returns 6 byte hardware address
245 * Return true if the address is valid.
247 int eth_getenv_enetaddr_by_index(const char *base_name
, int index
,
250 int eth_init(void); /* Initialize the device */
251 int eth_send(void *packet
, int length
); /* Send a packet */
254 int eth_receive(void *packet
, int length
); /* Receive a packet*/
255 extern void (*push_packet
)(void *packet
, int length
);
257 int eth_rx(void); /* Check for received packets */
258 void eth_halt(void); /* stop SCC */
259 const char *eth_get_name(void); /* get name of current device */
261 #ifdef CONFIG_MCAST_TFTP
262 int eth_mcast_join(struct in_addr mcast_addr
, int join
);
263 u32
ether_crc(size_t len
, unsigned char const *p
);
267 /**********************************************************************/
276 struct ethernet_hdr
{
277 u8 et_dest
[6]; /* Destination node */
278 u8 et_src
[6]; /* Source node */
279 u16 et_protlen
; /* Protocol or length */
282 /* Ethernet header size */
283 #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr))
285 #define ETH_FCS_LEN 4 /* Octets in the FCS */
288 u8 et_dest
[6]; /* Destination node */
289 u8 et_src
[6]; /* Source node */
290 u16 et_protlen
; /* Protocol or length */
291 u8 et_dsap
; /* 802 DSAP */
292 u8 et_ssap
; /* 802 SSAP */
293 u8 et_ctl
; /* 802 control */
294 u8 et_snap1
; /* SNAP */
297 u16 et_prot
; /* 802 protocol */
300 /* 802 + SNAP + ethernet header size */
301 #define E802_HDR_SIZE (sizeof(struct e802_hdr))
304 * Virtual LAN Ethernet header
306 struct vlan_ethernet_hdr
{
307 u8 vet_dest
[6]; /* Destination node */
308 u8 vet_src
[6]; /* Source node */
309 u16 vet_vlan_type
; /* PROT_VLAN */
310 u16 vet_tag
; /* TAG of VLAN */
311 u16 vet_type
; /* protocol type */
314 /* VLAN Ethernet header size */
315 #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr))
317 #define PROT_IP 0x0800 /* IP protocol */
318 #define PROT_ARP 0x0806 /* IP ARP protocol */
319 #define PROT_RARP 0x8035 /* IP ARP protocol */
320 #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */
322 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
323 #define IPPROTO_UDP 17 /* User Datagram Protocol */
326 * Internet Protocol (IP) header.
329 u8 ip_hl_v
; /* header length and version */
330 u8 ip_tos
; /* type of service */
331 u16 ip_len
; /* total length */
332 u16 ip_id
; /* identification */
333 u16 ip_off
; /* fragment offset field */
334 u8 ip_ttl
; /* time to live */
335 u8 ip_p
; /* protocol */
336 u16 ip_sum
; /* checksum */
337 struct in_addr ip_src
; /* Source IP address */
338 struct in_addr ip_dst
; /* Destination IP address */
341 #define IP_OFFS 0x1fff /* ip offset *= 8 */
342 #define IP_FLAGS 0xe000 /* first 3 bits */
343 #define IP_FLAGS_RES 0x8000 /* reserved */
344 #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */
345 #define IP_FLAGS_MFRAG 0x2000 /* more fragments */
347 #define IP_HDR_SIZE (sizeof(struct ip_hdr))
350 * Internet Protocol (IP) + UDP header.
353 u8 ip_hl_v
; /* header length and version */
354 u8 ip_tos
; /* type of service */
355 u16 ip_len
; /* total length */
356 u16 ip_id
; /* identification */
357 u16 ip_off
; /* fragment offset field */
358 u8 ip_ttl
; /* time to live */
359 u8 ip_p
; /* protocol */
360 u16 ip_sum
; /* checksum */
361 struct in_addr ip_src
; /* Source IP address */
362 struct in_addr ip_dst
; /* Destination IP address */
363 u16 udp_src
; /* UDP source port */
364 u16 udp_dst
; /* UDP destination port */
365 u16 udp_len
; /* Length of UDP packet */
366 u16 udp_xsum
; /* Checksum */
369 #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr))
370 #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE)
373 * Address Resolution Protocol (ARP) header.
376 u16 ar_hrd
; /* Format of hardware address */
377 # define ARP_ETHER 1 /* Ethernet hardware address */
378 u16 ar_pro
; /* Format of protocol address */
379 u8 ar_hln
; /* Length of hardware address */
381 u8 ar_pln
; /* Length of protocol address */
383 u16 ar_op
; /* Operation */
384 # define ARPOP_REQUEST 1 /* Request to resolve address */
385 # define ARPOP_REPLY 2 /* Response to previous request */
387 # define RARPOP_REQUEST 3 /* Request to resolve address */
388 # define RARPOP_REPLY 4 /* Response to previous request */
391 * The remaining fields are variable in size, according to
392 * the sizes above, and are defined as appropriate for
393 * specific hardware/protocol combinations.
396 #define ar_sha ar_data[0]
397 #define ar_spa ar_data[ARP_HLEN]
398 #define ar_tha ar_data[ARP_HLEN + ARP_PLEN]
399 #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN]
401 u8 ar_sha
[]; /* Sender hardware address */
402 u8 ar_spa
[]; /* Sender protocol address */
403 u8 ar_tha
[]; /* Target hardware address */
404 u8 ar_tpa
[]; /* Target protocol address */
408 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
411 * ICMP stuff (just enough to handle (host) redirect messages)
413 #define ICMP_ECHO_REPLY 0 /* Echo reply */
414 #define ICMP_NOT_REACH 3 /* Detination unreachable */
415 #define ICMP_REDIRECT 5 /* Redirect (change route) */
416 #define ICMP_ECHO_REQUEST 8 /* Echo request */
418 /* Codes for REDIRECT. */
419 #define ICMP_REDIR_NET 0 /* Redirect Net */
420 #define ICMP_REDIR_HOST 1 /* Redirect Host */
422 /* Codes for NOT_REACH */
423 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */
443 #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr))
444 #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE)
447 * Maximum packet size; used to allocate packet storage.
448 * TFTP packets can be 524 bytes + IP header + ethernet header.
449 * Lets be conservative, and go for 38 * 16. (Must also be
450 * a multiple of 32 bytes).
453 * AS.HARNOIS : Better to set PKTSIZE to maximum size because
454 * traffic type is not always controlled
455 * maximum packet size = 1518
456 * maximum packet size and multiple of 32 bytes = 1536
459 #define PKTSIZE_ALIGN 1536
460 /*#define PKTSIZE 608*/
463 * Maximum receive ring size; that is, the number of packets
464 * we can buffer before overflow happens. Basically, this just
465 * needs to be enough to prevent a packet being discarded while
466 * we are processing the previous one.
469 #define RINGSZ_LOG2 2
471 /**********************************************************************/
477 * All variables of type struct in_addr are stored in NETWORK byte order
482 /** BOOTP EXTENTIONS **/
483 extern struct in_addr net_gateway
; /* Our gateway IP address */
484 extern struct in_addr net_netmask
; /* Our subnet mask (0 = unknown) */
485 /* Our Domain Name Server (0 = unknown) */
486 extern struct in_addr net_dns_server
;
487 #if defined(CONFIG_BOOTP_DNS2)
488 /* Our 2nd Domain Name Server (0 = unknown) */
489 extern struct in_addr net_dns_server2
;
491 extern char net_nis_domain
[32]; /* Our IS domain */
492 extern char net_hostname
[32]; /* Our hostname */
493 extern char net_root_path
[64]; /* Our root path */
494 /** END OF BOOTP EXTENTIONS **/
495 extern u8 net_ethaddr
[6]; /* Our ethernet address */
496 extern u8 net_server_ethaddr
[6]; /* Boot server enet address */
497 extern struct in_addr net_ip
; /* Our IP addr (0 = unknown) */
498 extern struct in_addr net_server_ip
; /* Server IP addr (0 = unknown) */
499 extern uchar
*net_tx_packet
; /* THE transmit packet */
500 extern uchar
*net_rx_packets
[PKTBUFSRX
]; /* Receive packets */
501 extern uchar
*net_rx_packet
; /* Current receive packet */
502 extern int net_rx_packet_len
; /* Current rx packet length */
503 extern const u8 net_bcast_ethaddr
[6]; /* Ethernet broadcast address */
504 extern const u8 net_null_ethaddr
[6];
506 #define VLAN_NONE 4095 /* untagged */
507 #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */
508 extern ushort net_our_vlan
; /* Our VLAN */
509 extern ushort net_native_vlan
; /* Our Native VLAN */
511 extern int net_restart_wrap
; /* Tried all network devices */
514 BOOTP
, RARP
, ARP
, TFTPGET
, DHCP
, PING
, DNS
, NFS
, CDP
, NETCONS
, SNTP
,
515 TFTPSRV
, TFTPPUT
, LINKLOCAL
518 extern char net_boot_file_name
[1024];/* Boot File name */
519 /* The actual transferred size of the bootfile (in bytes) */
520 extern u32 net_boot_file_size
;
521 /* Boot file size in blocks as reported by the DHCP server */
522 extern u32 net_boot_file_expected_size_in_blocks
;
524 #if defined(CONFIG_CMD_DNS)
525 extern char *net_dns_resolve
; /* The host to resolve */
526 extern char *net_dns_env_var
; /* the env var to put the ip into */
529 #if defined(CONFIG_CMD_PING)
530 extern struct in_addr net_ping_ip
; /* the ip address to ping */
533 #if defined(CONFIG_CMD_CDP)
534 /* when CDP completes these hold the return values */
535 extern ushort cdp_native_vlan
; /* CDP returned native VLAN */
536 extern ushort cdp_appliance_vlan
; /* CDP returned appliance VLAN */
539 * Check for a CDP packet by examining the received MAC address field
541 static inline int is_cdp_packet(const uchar
*ethaddr
)
543 extern const u8 net_cdp_ethaddr
[6];
545 return memcmp(ethaddr
, net_cdp_ethaddr
, 6) == 0;
549 #if defined(CONFIG_CMD_SNTP)
550 extern struct in_addr net_ntp_server
; /* the ip address to NTP */
551 extern int net_ntp_time_offset
; /* offset time from UTC */
554 #if defined(CONFIG_MCAST_TFTP)
555 extern struct in_addr net_mcast_addr
;
558 /* Initialize the network adapter */
560 int net_loop(enum proto_t
);
562 /* Load failed. Start again. */
563 int net_start_again(void);
565 /* Get size of the ethernet header when we send */
566 int net_eth_hdr_size(void);
568 /* Set ethernet header; returns the size of the header */
569 int net_set_ether(uchar
*xet
, const uchar
*dest_ethaddr
, uint prot
);
570 int net_update_ether(struct ethernet_hdr
*et
, uchar
*addr
, uint prot
);
573 void net_set_ip_header(uchar
*pkt
, struct in_addr dest
, struct in_addr source
);
574 void net_set_udp_header(uchar
*pkt
, struct in_addr dest
, int dport
,
578 * compute_ip_checksum() - Compute IP checksum
580 * @addr: Address to check (must be 16-bit aligned)
581 * @nbytes: Number of bytes to check (normally a multiple of 2)
582 * @return 16-bit IP checksum
584 unsigned compute_ip_checksum(const void *addr
, unsigned nbytes
);
587 * add_ip_checksums() - add two IP checksums
589 * @offset: Offset of first sum (if odd we do a byte-swap)
590 * @sum: First checksum
591 * @new_sum: New checksum to add
592 * @return updated 16-bit IP checksum
594 unsigned add_ip_checksums(unsigned offset
, unsigned sum
, unsigned new_sum
);
597 * ip_checksum_ok() - check if a checksum is correct
599 * This works by making sure the checksum sums to 0
601 * @addr: Address to check (must be 16-bit aligned)
602 * @nbytes: Number of bytes to check (normally a multiple of 2)
603 * @return true if the checksum matches, false if not
605 int ip_checksum_ok(const void *addr
, unsigned nbytes
);
608 rxhand_f
*net_get_udp_handler(void); /* Get UDP RX packet handler */
609 void net_set_udp_handler(rxhand_f
*); /* Set UDP RX packet handler */
610 rxhand_f
*net_get_arp_handler(void); /* Get ARP RX packet handler */
611 void net_set_arp_handler(rxhand_f
*); /* Set ARP RX packet handler */
612 void net_set_icmp_handler(rxhand_icmp_f
*f
); /* Set ICMP RX handler */
613 void net_set_timeout_handler(ulong
, thand_f
*);/* Set timeout handler */
615 /* Network loop state */
616 enum net_loop_state
{
622 extern enum net_loop_state net_state
;
624 static inline void net_set_state(enum net_loop_state state
)
626 debug_cond(DEBUG_INT_STATE
, "--- NetState set to %d\n", state
);
630 /* Transmit a packet */
631 static inline void net_send_packet(uchar
*pkt
, int len
)
633 /* Currently no way to return errors from eth_send() */
634 (void) eth_send(pkt
, len
);
638 * Transmit "net_tx_packet" as UDP packet, performing ARP request if needed
639 * (ether will be populated)
641 * @param ether Raw packet buffer
642 * @param dest IP address to send the datagram to
643 * @param dport Destination UDP port
644 * @param sport Source UDP port
645 * @param payload_len Length of data after the UDP header
647 int net_send_udp_packet(uchar
*ether
, struct in_addr dest
, int dport
,
648 int sport
, int payload_len
);
650 /* Processes a received packet */
651 void net_process_received_packet(uchar
*in_packet
, int len
);
653 #ifdef CONFIG_NETCONSOLE
655 int nc_input_packet(uchar
*pkt
, struct in_addr src_ip
, unsigned dest_port
,
656 unsigned src_port
, unsigned len
);
659 static __always_inline
int eth_is_on_demand_init(void)
661 #ifdef CONFIG_NETCONSOLE
662 extern enum proto_t net_loop_last_protocol
;
664 return net_loop_last_protocol
!= NETCONS
;
670 static inline void eth_set_last_protocol(int protocol
)
672 #ifdef CONFIG_NETCONSOLE
673 extern enum proto_t net_loop_last_protocol
;
675 net_loop_last_protocol
= protocol
;
680 * Check if autoload is enabled. If so, use either NFS or TFTP to download
683 void net_auto_load(void);
686 * The following functions are a bit ugly, but necessary to deal with
687 * alignment restrictions on ARM.
689 * We're using inline functions, which had the smallest memory
690 * footprint in our tests.
692 /* return IP *in network byteorder* */
693 static inline struct in_addr
net_read_ip(void *from
)
697 memcpy((void *)&ip
, (void *)from
, sizeof(ip
));
701 /* return ulong *in network byteorder* */
702 static inline u32
net_read_u32(u32
*from
)
706 memcpy((void *)&l
, (void *)from
, sizeof(l
));
710 /* write IP *in network byteorder* */
711 static inline void net_write_ip(void *to
, struct in_addr ip
)
713 memcpy(to
, (void *)&ip
, sizeof(ip
));
717 static inline void net_copy_ip(void *to
, void *from
)
719 memcpy((void *)to
, from
, sizeof(struct in_addr
));
723 static inline void net_copy_u32(u32
*to
, u32
*from
)
725 memcpy((void *)to
, (void *)from
, sizeof(u32
));
729 * is_zero_ethaddr - Determine if give Ethernet address is all zeros.
730 * @addr: Pointer to a six-byte array containing the Ethernet address
732 * Return true if the address is all zeroes.
734 static inline int is_zero_ethaddr(const u8
*addr
)
736 return !(addr
[0] | addr
[1] | addr
[2] | addr
[3] | addr
[4] | addr
[5]);
740 * is_multicast_ethaddr - Determine if the Ethernet address is a multicast.
741 * @addr: Pointer to a six-byte array containing the Ethernet address
743 * Return true if the address is a multicast address.
744 * By definition the broadcast address is also a multicast address.
746 static inline int is_multicast_ethaddr(const u8
*addr
)
748 return 0x01 & addr
[0];
752 * is_broadcast_ethaddr - Determine if the Ethernet address is broadcast
753 * @addr: Pointer to a six-byte array containing the Ethernet address
755 * Return true if the address is the broadcast address.
757 static inline int is_broadcast_ethaddr(const u8
*addr
)
759 return (addr
[0] & addr
[1] & addr
[2] & addr
[3] & addr
[4] & addr
[5]) ==
764 * is_valid_ethaddr - Determine if the given Ethernet address is valid
765 * @addr: Pointer to a six-byte array containing the Ethernet address
767 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
768 * a multicast address, and is not FF:FF:FF:FF:FF:FF.
770 * Return true if the address is valid.
772 static inline int is_valid_ethaddr(const u8
*addr
)
774 /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
775 * explicitly check for it here. */
776 return !is_multicast_ethaddr(addr
) && !is_zero_ethaddr(addr
);
780 * net_random_ethaddr - Generate software assigned random Ethernet address
781 * @addr: Pointer to a six-byte array containing the Ethernet address
783 * Generate a random Ethernet address (MAC) that is not multicast
784 * and has the local assigned bit set.
786 static inline void net_random_ethaddr(uchar
*addr
)
789 unsigned int seed
= get_timer(0);
791 for (i
= 0; i
< 6; i
++)
792 addr
[i
] = rand_r(&seed
);
794 addr
[0] &= 0xfe; /* clear multicast bit */
795 addr
[0] |= 0x02; /* set local assignment bit (IEEE802) */
798 /* Convert an IP address to a string */
799 void ip_to_string(struct in_addr x
, char *s
);
801 /* Convert a string to ip address */
802 struct in_addr
string_to_ip(const char *s
);
804 /* Convert a VLAN id to a string */
805 void vlan_to_string(ushort x
, char *s
);
807 /* Convert a string to a vlan id */
808 ushort
string_to_vlan(const char *s
);
810 /* read a VLAN id from an environment variable */
811 ushort
getenv_vlan(char *);
813 /* copy a filename (allow for "..." notation, limit length) */
814 void copy_filename(char *dst
, const char *src
, int size
);
816 /* get a random source port */
817 unsigned int random_port(void);
820 * update_tftp - Update firmware over TFTP (via DFU)
822 * This function updates board's firmware via TFTP
824 * @param addr - memory address where data is stored
825 * @param interface - the DFU medium name - e.g. "mmc"
826 * @param devstring - the DFU medium number - e.g. "1"
828 * @return - 0 on success, other value on failure
830 int update_tftp(ulong addr
, char *interface
, char *devstring
);
832 /**********************************************************************/
834 #endif /* __NET_H__ */