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 /* ARP hardware address length */
44 * The size of a MAC address in string form, each digit requires two chars
45 * and five separator characters to form '00:00:00:00:00:00'.
47 #define ARP_HLEN_ASCII (ARP_HLEN * 2) + (ARP_HLEN - 1)
49 /* IPv4 addresses are always 32 bits in size */
55 * An incoming packet handler.
56 * @param pkt pointer to the application packet
57 * @param dport destination UDP port
58 * @param sip source IP address
59 * @param sport source UDP port
60 * @param len packet length
62 typedef void rxhand_f(uchar *pkt, unsigned dport,
63 struct in_addr sip, unsigned sport,
67 * An incoming ICMP packet handler.
68 * @param type ICMP type
69 * @param code ICMP code
70 * @param dport destination UDP port
71 * @param sip source IP address
72 * @param sport source UDP port
73 * @param pkt pointer to the ICMP packet data
74 * @param len packet length
76 typedef void rxhand_icmp_f(unsigned type, unsigned code, unsigned dport,
77 struct in_addr sip, unsigned sport, uchar *pkt, unsigned len);
80 * A timeout handler. Called after time interval has expired.
82 typedef void thand_f(void);
92 * struct eth_pdata - Platform data for Ethernet MAC controllers
94 * @iobase: The base address of the hardware registers
95 * @enetaddr: The Ethernet MAC address that is loaded from EEPROM or env
96 * @phy_interface: PHY interface to use - see PHY_INTERFACE_MODE_...
97 * @max_speed: Maximum speed of Ethernet connection supported by MAC
101 unsigned char enetaddr[ARP_HLEN];
106 enum eth_recv_flags {
108 * Check hardware device for new packets (otherwise only return those
109 * which are already in the memory buffer ready to process)
111 ETH_RECV_CHECK_DEVICE = 1 << 0,
115 * struct eth_ops - functions of Ethernet MAC controllers
117 * start: Prepare the hardware to send and receive packets
118 * send: Send the bytes passed in "packet" as a packet on the wire
119 * recv: Check if the hardware received a packet. If so, set the pointer to the
120 * packet buffer in the packetp parameter. If not, return an error or 0 to
121 * indicate that the hardware receive FIFO is empty. If 0 is returned, the
122 * network stack will not process the empty packet, but free_pkt() will be
124 * free_pkt: Give the driver an opportunity to manage its packet buffer memory
125 * when the network stack is finished processing it. This will only be
126 * called when no error was returned from recv - optional
127 * stop: Stop the hardware from looking for packets - may be called even if
129 * mcast: Join or leave a multicast group (for TFTP) - optional
130 * write_hwaddr: Write a MAC address to the hardware (used to pass it to Linux
131 * on some platforms like ARM). This function expects the
132 * eth_pdata::enetaddr field to be populated. The method can
133 * return -ENOSYS to indicate that this is not implemented for
134 this hardware - optional.
135 * read_rom_hwaddr: Some devices have a backup of the MAC address stored in a
136 * ROM on the board. This is how the driver should expose it
137 * to the network stack. This function should fill in the
138 * eth_pdata::enetaddr field - optional
141 int (*start)(struct udevice *dev);
142 int (*send)(struct udevice *dev, void *packet, int length);
143 int (*recv)(struct udevice *dev, int flags, uchar **packetp);
144 int (*free_pkt)(struct udevice *dev, uchar *packet, int length);
145 void (*stop)(struct udevice *dev);
146 #ifdef CONFIG_MCAST_TFTP
147 int (*mcast)(struct udevice *dev, const u8 *enetaddr, int join);
149 int (*write_hwaddr)(struct udevice *dev);
150 int (*read_rom_hwaddr)(struct udevice *dev);
153 #define eth_get_ops(dev) ((struct eth_ops *)(dev)->driver->ops)
155 struct udevice *eth_get_dev(void); /* get the current device */
157 * The devname can be either an exact name given by the driver or device tree
158 * or it can be an alias of the form "eth%d"
160 struct udevice *eth_get_dev_by_name(const char *devname);
161 unsigned char *eth_get_ethaddr(void); /* get the current device MAC */
163 /* Used only when NetConsole is enabled */
164 int eth_is_active(struct udevice *dev); /* Test device for active state */
165 int eth_init_state_only(void); /* Set active state */
166 void eth_halt_state_only(void); /* Set passive state */
169 #ifndef CONFIG_DM_ETH
172 unsigned char enetaddr[ARP_HLEN];
176 int (*init)(struct eth_device *, bd_t *);
177 int (*send)(struct eth_device *, void *packet, int length);
178 int (*recv)(struct eth_device *);
179 void (*halt)(struct eth_device *);
180 #ifdef CONFIG_MCAST_TFTP
181 int (*mcast)(struct eth_device *, const u8 *enetaddr, u8 set);
183 int (*write_hwaddr)(struct eth_device *);
184 struct eth_device *next;
189 int eth_register(struct eth_device *dev);/* Register network device */
190 int eth_unregister(struct eth_device *dev);/* Remove network device */
192 extern struct eth_device *eth_current;
194 static __always_inline struct eth_device *eth_get_dev(void)
198 struct eth_device *eth_get_dev_by_name(const char *devname);
199 struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */
201 /* get the current device MAC */
202 static inline unsigned char *eth_get_ethaddr(void)
205 return eth_current->enetaddr;
209 /* Used only when NetConsole is enabled */
210 int eth_is_active(struct eth_device *dev); /* Test device for active state */
211 /* Set active state */
212 static __always_inline int eth_init_state_only(void)
214 eth_get_dev()->state = ETH_STATE_ACTIVE;
218 /* Set passive state */
219 static __always_inline void eth_halt_state_only(void)
221 eth_get_dev()->state = ETH_STATE_PASSIVE;
225 * Set the hardware address for an ethernet interface based on 'eth%daddr'
226 * environment variable (or just 'ethaddr' if eth_number is 0).
228 * base_name - base name for device (normally "eth")
229 * eth_number - value of %d (0 for first device of this type)
231 * 0 is success, non-zero is error status from driver.
233 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
236 int usb_eth_initialize(bd_t *bi);
239 int eth_initialize(void); /* Initialize network subsystem */
240 void eth_try_another(int first_restart); /* Change the device */
241 void eth_set_current(void); /* set nterface to ethcur var */
243 int eth_get_dev_index(void); /* get the device index */
244 void eth_parse_enetaddr(const char *addr, uchar *enetaddr);
245 int eth_getenv_enetaddr(const char *name, uchar *enetaddr);
246 int eth_setenv_enetaddr(const char *name, const uchar *enetaddr);
249 * eth_setenv_enetaddr_by_index() - set the MAC address environment variable
251 * This sets up an environment variable with the given MAC address (@enetaddr).
252 * The environment variable to be set is defined by <@base_name><@index>addr.
253 * If @index is 0 it is omitted. For common Ethernet this means ethaddr,
256 * @base_name: Base name for variable, typically "eth"
257 * @index: Index of interface being updated (>=0)
258 * @enetaddr: Pointer to MAC address to put into the variable
259 * @return 0 if OK, other value on error
261 int eth_setenv_enetaddr_by_index(const char *base_name, int index,
266 * Initialize USB ethernet device with CONFIG_DM_ETH
268 * 0 is success, non-zero is error status.
270 int usb_ether_init(void);
273 * Get the hardware address for an ethernet interface .
275 * base_name - base name for device (normally "eth")
276 * index - device index number (0 for first)
277 * enetaddr - returns 6 byte hardware address
279 * Return true if the address is valid.
281 int eth_getenv_enetaddr_by_index(const char *base_name, int index,
284 int eth_init(void); /* Initialize the device */
285 int eth_send(void *packet, int length); /* Send a packet */
287 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
288 int eth_receive(void *packet, int length); /* Receive a packet*/
289 extern void (*push_packet)(void *packet, int length);
291 int eth_rx(void); /* Check for received packets */
292 void eth_halt(void); /* stop SCC */
293 const char *eth_get_name(void); /* get name of current device */
295 #ifdef CONFIG_MCAST_TFTP
296 int eth_mcast_join(struct in_addr mcast_addr, int join);
297 u32 ether_crc(size_t len, unsigned char const *p);
301 /**********************************************************************/
310 struct ethernet_hdr {
311 u8 et_dest[ARP_HLEN]; /* Destination node */
312 u8 et_src[ARP_HLEN]; /* Source node */
313 u16 et_protlen; /* Protocol or length */
316 /* Ethernet header size */
317 #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr))
319 #define ETH_FCS_LEN 4 /* Octets in the FCS */
322 u8 et_dest[ARP_HLEN]; /* Destination node */
323 u8 et_src[ARP_HLEN]; /* Source node */
324 u16 et_protlen; /* Protocol or length */
325 u8 et_dsap; /* 802 DSAP */
326 u8 et_ssap; /* 802 SSAP */
327 u8 et_ctl; /* 802 control */
328 u8 et_snap1; /* SNAP */
331 u16 et_prot; /* 802 protocol */
334 /* 802 + SNAP + ethernet header size */
335 #define E802_HDR_SIZE (sizeof(struct e802_hdr))
338 * Virtual LAN Ethernet header
340 struct vlan_ethernet_hdr {
341 u8 vet_dest[ARP_HLEN]; /* Destination node */
342 u8 vet_src[ARP_HLEN]; /* Source node */
343 u16 vet_vlan_type; /* PROT_VLAN */
344 u16 vet_tag; /* TAG of VLAN */
345 u16 vet_type; /* protocol type */
348 /* VLAN Ethernet header size */
349 #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr))
351 #define PROT_IP 0x0800 /* IP protocol */
352 #define PROT_ARP 0x0806 /* IP ARP protocol */
353 #define PROT_RARP 0x8035 /* IP ARP protocol */
354 #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */
355 #define PROT_IPV6 0x86dd /* IPv6 over bluebook */
356 #define PROT_PPP_SES 0x8864 /* PPPoE session messages */
358 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
359 #define IPPROTO_UDP 17 /* User Datagram Protocol */
362 * Internet Protocol (IP) header.
365 u8 ip_hl_v; /* header length and version */
366 u8 ip_tos; /* type of service */
367 u16 ip_len; /* total length */
368 u16 ip_id; /* identification */
369 u16 ip_off; /* fragment offset field */
370 u8 ip_ttl; /* time to live */
371 u8 ip_p; /* protocol */
372 u16 ip_sum; /* checksum */
373 struct in_addr ip_src; /* Source IP address */
374 struct in_addr ip_dst; /* Destination IP address */
377 #define IP_OFFS 0x1fff /* ip offset *= 8 */
378 #define IP_FLAGS 0xe000 /* first 3 bits */
379 #define IP_FLAGS_RES 0x8000 /* reserved */
380 #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */
381 #define IP_FLAGS_MFRAG 0x2000 /* more fragments */
383 #define IP_HDR_SIZE (sizeof(struct ip_hdr))
386 * Internet Protocol (IP) + UDP header.
389 u8 ip_hl_v; /* header length and version */
390 u8 ip_tos; /* type of service */
391 u16 ip_len; /* total length */
392 u16 ip_id; /* identification */
393 u16 ip_off; /* fragment offset field */
394 u8 ip_ttl; /* time to live */
395 u8 ip_p; /* protocol */
396 u16 ip_sum; /* checksum */
397 struct in_addr ip_src; /* Source IP address */
398 struct in_addr ip_dst; /* Destination IP address */
399 u16 udp_src; /* UDP source port */
400 u16 udp_dst; /* UDP destination port */
401 u16 udp_len; /* Length of UDP packet */
402 u16 udp_xsum; /* Checksum */
405 #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr))
406 #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE)
409 * Address Resolution Protocol (ARP) header.
412 u16 ar_hrd; /* Format of hardware address */
413 # define ARP_ETHER 1 /* Ethernet hardware address */
414 u16 ar_pro; /* Format of protocol address */
415 u8 ar_hln; /* Length of hardware address */
416 u8 ar_pln; /* Length of protocol address */
418 u16 ar_op; /* Operation */
419 # define ARPOP_REQUEST 1 /* Request to resolve address */
420 # define ARPOP_REPLY 2 /* Response to previous request */
422 # define RARPOP_REQUEST 3 /* Request to resolve address */
423 # define RARPOP_REPLY 4 /* Response to previous request */
426 * The remaining fields are variable in size, according to
427 * the sizes above, and are defined as appropriate for
428 * specific hardware/protocol combinations.
431 #define ar_sha ar_data[0]
432 #define ar_spa ar_data[ARP_HLEN]
433 #define ar_tha ar_data[ARP_HLEN + ARP_PLEN]
434 #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN]
436 u8 ar_sha[]; /* Sender hardware address */
437 u8 ar_spa[]; /* Sender protocol address */
438 u8 ar_tha[]; /* Target hardware address */
439 u8 ar_tpa[]; /* Target protocol address */
443 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
446 * ICMP stuff (just enough to handle (host) redirect messages)
448 #define ICMP_ECHO_REPLY 0 /* Echo reply */
449 #define ICMP_NOT_REACH 3 /* Detination unreachable */
450 #define ICMP_REDIRECT 5 /* Redirect (change route) */
451 #define ICMP_ECHO_REQUEST 8 /* Echo request */
453 /* Codes for REDIRECT. */
454 #define ICMP_REDIR_NET 0 /* Redirect Net */
455 #define ICMP_REDIR_HOST 1 /* Redirect Host */
457 /* Codes for NOT_REACH */
458 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */
478 #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr))
479 #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE)
482 * Maximum packet size; used to allocate packet storage. Use
483 * the maxium Ethernet frame size as specified by the Ethernet
484 * standard including the 802.1Q tag (VLAN tagging).
485 * maximum packet size = 1522
486 * maximum packet size and multiple of 32 bytes = 1536
489 #define PKTSIZE_ALIGN 1536
492 * Maximum receive ring size; that is, the number of packets
493 * we can buffer before overflow happens. Basically, this just
494 * needs to be enough to prevent a packet being discarded while
495 * we are processing the previous one.
498 #define RINGSZ_LOG2 2
500 /**********************************************************************/
506 * All variables of type struct in_addr are stored in NETWORK byte order
511 /** BOOTP EXTENTIONS **/
512 extern struct in_addr net_gateway; /* Our gateway IP address */
513 extern struct in_addr net_netmask; /* Our subnet mask (0 = unknown) */
514 /* Our Domain Name Server (0 = unknown) */
515 extern struct in_addr net_dns_server;
516 #if defined(CONFIG_BOOTP_DNS2)
517 /* Our 2nd Domain Name Server (0 = unknown) */
518 extern struct in_addr net_dns_server2;
520 extern char net_nis_domain[32]; /* Our IS domain */
521 extern char net_hostname[32]; /* Our hostname */
522 extern char net_root_path[64]; /* Our root path */
523 /** END OF BOOTP EXTENTIONS **/
524 extern u8 net_ethaddr[ARP_HLEN]; /* Our ethernet address */
525 extern u8 net_server_ethaddr[ARP_HLEN]; /* Boot server enet address */
526 extern struct in_addr net_ip; /* Our IP addr (0 = unknown) */
527 extern struct in_addr net_server_ip; /* Server IP addr (0 = unknown) */
528 extern uchar *net_tx_packet; /* THE transmit packet */
529 extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */
530 extern uchar *net_rx_packet; /* Current receive packet */
531 extern int net_rx_packet_len; /* Current rx packet length */
532 extern const u8 net_bcast_ethaddr[ARP_HLEN]; /* Ethernet broadcast address */
533 extern const u8 net_null_ethaddr[ARP_HLEN];
535 #define VLAN_NONE 4095 /* untagged */
536 #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */
537 extern ushort net_our_vlan; /* Our VLAN */
538 extern ushort net_native_vlan; /* Our Native VLAN */
540 extern int net_restart_wrap; /* Tried all network devices */
543 BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
544 TFTPSRV, TFTPPUT, LINKLOCAL
547 extern char net_boot_file_name[1024];/* Boot File name */
548 /* The actual transferred size of the bootfile (in bytes) */
549 extern u32 net_boot_file_size;
550 /* Boot file size in blocks as reported by the DHCP server */
551 extern u32 net_boot_file_expected_size_in_blocks;
553 #if defined(CONFIG_CMD_DNS)
554 extern char *net_dns_resolve; /* The host to resolve */
555 extern char *net_dns_env_var; /* the env var to put the ip into */
558 #if defined(CONFIG_CMD_PING)
559 extern struct in_addr net_ping_ip; /* the ip address to ping */
562 #if defined(CONFIG_CMD_CDP)
563 /* when CDP completes these hold the return values */
564 extern ushort cdp_native_vlan; /* CDP returned native VLAN */
565 extern ushort cdp_appliance_vlan; /* CDP returned appliance VLAN */
568 * Check for a CDP packet by examining the received MAC address field
570 static inline int is_cdp_packet(const uchar *ethaddr)
572 extern const u8 net_cdp_ethaddr[ARP_HLEN];
574 return memcmp(ethaddr, net_cdp_ethaddr, ARP_HLEN) == 0;
578 #if defined(CONFIG_CMD_SNTP)
579 extern struct in_addr net_ntp_server; /* the ip address to NTP */
580 extern int net_ntp_time_offset; /* offset time from UTC */
583 #if defined(CONFIG_MCAST_TFTP)
584 extern struct in_addr net_mcast_addr;
587 /* Initialize the network adapter */
589 int net_loop(enum proto_t);
591 /* Load failed. Start again. */
592 int net_start_again(void);
594 /* Get size of the ethernet header when we send */
595 int net_eth_hdr_size(void);
597 /* Set ethernet header; returns the size of the header */
598 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot);
599 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot);
602 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source);
603 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport,
607 * compute_ip_checksum() - Compute IP checksum
609 * @addr: Address to check (must be 16-bit aligned)
610 * @nbytes: Number of bytes to check (normally a multiple of 2)
611 * @return 16-bit IP checksum
613 unsigned compute_ip_checksum(const void *addr, unsigned nbytes);
616 * add_ip_checksums() - add two IP checksums
618 * @offset: Offset of first sum (if odd we do a byte-swap)
619 * @sum: First checksum
620 * @new_sum: New checksum to add
621 * @return updated 16-bit IP checksum
623 unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum);
626 * ip_checksum_ok() - check if a checksum is correct
628 * This works by making sure the checksum sums to 0
630 * @addr: Address to check (must be 16-bit aligned)
631 * @nbytes: Number of bytes to check (normally a multiple of 2)
632 * @return true if the checksum matches, false if not
634 int ip_checksum_ok(const void *addr, unsigned nbytes);
637 rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */
638 void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */
639 rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */
640 void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */
641 void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
642 void net_set_timeout_handler(ulong, thand_f *);/* Set timeout handler */
644 /* Network loop state */
645 enum net_loop_state {
651 extern enum net_loop_state net_state;
653 static inline void net_set_state(enum net_loop_state state)
655 debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state);
659 /* Transmit a packet */
660 static inline void net_send_packet(uchar *pkt, int len)
662 /* Currently no way to return errors from eth_send() */
663 (void) eth_send(pkt, len);
667 * Transmit "net_tx_packet" as UDP packet, performing ARP request if needed
668 * (ether will be populated)
670 * @param ether Raw packet buffer
671 * @param dest IP address to send the datagram to
672 * @param dport Destination UDP port
673 * @param sport Source UDP port
674 * @param payload_len Length of data after the UDP header
676 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport,
677 int sport, int payload_len);
679 /* Processes a received packet */
680 void net_process_received_packet(uchar *in_packet, int len);
682 #ifdef CONFIG_NETCONSOLE
684 int nc_input_packet(uchar *pkt, struct in_addr src_ip, unsigned dest_port,
685 unsigned src_port, unsigned len);
688 static __always_inline int eth_is_on_demand_init(void)
690 #ifdef CONFIG_NETCONSOLE
691 extern enum proto_t net_loop_last_protocol;
693 return net_loop_last_protocol != NETCONS;
699 static inline void eth_set_last_protocol(int protocol)
701 #ifdef CONFIG_NETCONSOLE
702 extern enum proto_t net_loop_last_protocol;
704 net_loop_last_protocol = protocol;
709 * Check if autoload is enabled. If so, use either NFS or TFTP to download
712 void net_auto_load(void);
715 * The following functions are a bit ugly, but necessary to deal with
716 * alignment restrictions on ARM.
718 * We're using inline functions, which had the smallest memory
719 * footprint in our tests.
721 /* return IP *in network byteorder* */
722 static inline struct in_addr net_read_ip(void *from)
726 memcpy((void *)&ip, (void *)from, sizeof(ip));
730 /* return ulong *in network byteorder* */
731 static inline u32 net_read_u32(u32 *from)
735 memcpy((void *)&l, (void *)from, sizeof(l));
739 /* write IP *in network byteorder* */
740 static inline void net_write_ip(void *to, struct in_addr ip)
742 memcpy(to, (void *)&ip, sizeof(ip));
746 static inline void net_copy_ip(void *to, void *from)
748 memcpy((void *)to, from, sizeof(struct in_addr));
752 static inline void net_copy_u32(u32 *to, u32 *from)
754 memcpy((void *)to, (void *)from, sizeof(u32));
758 * is_zero_ethaddr - Determine if give Ethernet address is all zeros.
759 * @addr: Pointer to a six-byte array containing the Ethernet address
761 * Return true if the address is all zeroes.
763 static inline int is_zero_ethaddr(const u8 *addr)
765 return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
769 * is_multicast_ethaddr - Determine if the Ethernet address is a multicast.
770 * @addr: Pointer to a six-byte array containing the Ethernet address
772 * Return true if the address is a multicast address.
773 * By definition the broadcast address is also a multicast address.
775 static inline int is_multicast_ethaddr(const u8 *addr)
777 return 0x01 & addr[0];
781 * is_broadcast_ethaddr - Determine if the Ethernet address is broadcast
782 * @addr: Pointer to a six-byte array containing the Ethernet address
784 * Return true if the address is the broadcast address.
786 static inline int is_broadcast_ethaddr(const u8 *addr)
788 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) ==
793 * is_valid_ethaddr - Determine if the given Ethernet address is valid
794 * @addr: Pointer to a six-byte array containing the Ethernet address
796 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
797 * a multicast address, and is not FF:FF:FF:FF:FF:FF.
799 * Return true if the address is valid.
801 static inline int is_valid_ethaddr(const u8 *addr)
803 /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
804 * explicitly check for it here. */
805 return !is_multicast_ethaddr(addr) && !is_zero_ethaddr(addr);
809 * net_random_ethaddr - Generate software assigned random Ethernet address
810 * @addr: Pointer to a six-byte array containing the Ethernet address
812 * Generate a random Ethernet address (MAC) that is not multicast
813 * and has the local assigned bit set.
815 static inline void net_random_ethaddr(uchar *addr)
818 unsigned int seed = get_timer(0);
820 for (i = 0; i < 6; i++)
821 addr[i] = rand_r(&seed);
823 addr[0] &= 0xfe; /* clear multicast bit */
824 addr[0] |= 0x02; /* set local assignment bit (IEEE802) */
827 /* Convert an IP address to a string */
828 void ip_to_string(struct in_addr x, char *s);
830 /* Convert a string to ip address */
831 struct in_addr string_to_ip(const char *s);
833 /* Convert a VLAN id to a string */
834 void vlan_to_string(ushort x, char *s);
836 /* Convert a string to a vlan id */
837 ushort string_to_vlan(const char *s);
839 /* read a VLAN id from an environment variable */
840 ushort getenv_vlan(char *);
842 /* copy a filename (allow for "..." notation, limit length) */
843 void copy_filename(char *dst, const char *src, int size);
845 /* get a random source port */
846 unsigned int random_port(void);
849 * update_tftp - Update firmware over TFTP (via DFU)
851 * This function updates board's firmware via TFTP
853 * @param addr - memory address where data is stored
854 * @param interface - the DFU medium name - e.g. "mmc"
855 * @param devstring - the DFU medium number - e.g. "1"
857 * @return - 0 on success, other value on failure
859 int update_tftp(ulong addr, char *interface, char *devstring);
861 /**********************************************************************/
863 #endif /* __NET_H__ */