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_...
89 * @max_speed: Maximum speed of Ethernet connection supported by MAC
93 unsigned char enetaddr[6];
100 * Check hardware device for new packets (otherwise only return those
101 * which are already in the memory buffer ready to process)
103 ETH_RECV_CHECK_DEVICE = 1 << 0,
107 * struct eth_ops - functions of Ethernet MAC controllers
109 * start: Prepare the hardware to send and receive packets
110 * send: Send the bytes passed in "packet" as a packet on the wire
111 * recv: Check if the hardware received a packet. If so, set the pointer to the
112 * packet buffer in the packetp parameter. If not, return an error or 0 to
113 * indicate that the hardware receive FIFO is empty. If 0 is returned, the
114 * network stack will not process the empty packet, but free_pkt() will be
116 * free_pkt: Give the driver an opportunity to manage its packet buffer memory
117 * when the network stack is finished processing it. This will only be
118 * called when no error was returned from recv - optional
119 * stop: Stop the hardware from looking for packets - may be called even if
121 * mcast: Join or leave a multicast group (for TFTP) - optional
122 * write_hwaddr: Write a MAC address to the hardware (used to pass it to Linux
123 * on some platforms like ARM). This function expects the
124 * eth_pdata::enetaddr field to be populated. The method can
125 * return -ENOSYS to indicate that this is not implemented for
126 this hardware - optional.
127 * read_rom_hwaddr: Some devices have a backup of the MAC address stored in a
128 * ROM on the board. This is how the driver should expose it
129 * to the network stack. This function should fill in the
130 * eth_pdata::enetaddr field - optional
133 int (*start)(struct udevice *dev);
134 int (*send)(struct udevice *dev, void *packet, int length);
135 int (*recv)(struct udevice *dev, int flags, uchar **packetp);
136 int (*free_pkt)(struct udevice *dev, uchar *packet, int length);
137 void (*stop)(struct udevice *dev);
138 #ifdef CONFIG_MCAST_TFTP
139 int (*mcast)(struct udevice *dev, const u8 *enetaddr, int join);
141 int (*write_hwaddr)(struct udevice *dev);
142 int (*read_rom_hwaddr)(struct udevice *dev);
145 #define eth_get_ops(dev) ((struct eth_ops *)(dev)->driver->ops)
147 struct udevice *eth_get_dev(void); /* get the current device */
149 * The devname can be either an exact name given by the driver or device tree
150 * or it can be an alias of the form "eth%d"
152 struct udevice *eth_get_dev_by_name(const char *devname);
153 unsigned char *eth_get_ethaddr(void); /* get the current device MAC */
155 /* Used only when NetConsole is enabled */
156 int eth_is_active(struct udevice *dev); /* Test device for active state */
157 int eth_init_state_only(void); /* Set active state */
158 void eth_halt_state_only(void); /* Set passive state */
161 #ifndef CONFIG_DM_ETH
164 unsigned char enetaddr[6];
168 int (*init)(struct eth_device *, bd_t *);
169 int (*send)(struct eth_device *, void *packet, int length);
170 int (*recv)(struct eth_device *);
171 void (*halt)(struct eth_device *);
172 #ifdef CONFIG_MCAST_TFTP
173 int (*mcast)(struct eth_device *, const u8 *enetaddr, u8 set);
175 int (*write_hwaddr)(struct eth_device *);
176 struct eth_device *next;
181 int eth_register(struct eth_device *dev);/* Register network device */
182 int eth_unregister(struct eth_device *dev);/* Remove network device */
184 extern struct eth_device *eth_current;
186 static __always_inline struct eth_device *eth_get_dev(void)
190 struct eth_device *eth_get_dev_by_name(const char *devname);
191 struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */
193 /* get the current device MAC */
194 static inline unsigned char *eth_get_ethaddr(void)
197 return eth_current->enetaddr;
201 /* Used only when NetConsole is enabled */
202 int eth_is_active(struct eth_device *dev); /* Test device for active state */
203 /* Set active state */
204 static __always_inline int eth_init_state_only(void)
206 eth_get_dev()->state = ETH_STATE_ACTIVE;
210 /* Set passive state */
211 static __always_inline void eth_halt_state_only(void)
213 eth_get_dev()->state = ETH_STATE_PASSIVE;
217 * Set the hardware address for an ethernet interface based on 'eth%daddr'
218 * environment variable (or just 'ethaddr' if eth_number is 0).
220 * base_name - base name for device (normally "eth")
221 * eth_number - value of %d (0 for first device of this type)
223 * 0 is success, non-zero is error status from driver.
225 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
228 int usb_eth_initialize(bd_t *bi);
231 int eth_initialize(void); /* Initialize network subsystem */
232 void eth_try_another(int first_restart); /* Change the device */
233 void eth_set_current(void); /* set nterface to ethcur var */
235 int eth_get_dev_index(void); /* get the device index */
236 void eth_parse_enetaddr(const char *addr, uchar *enetaddr);
237 int eth_getenv_enetaddr(const char *name, uchar *enetaddr);
238 int eth_setenv_enetaddr(const char *name, const uchar *enetaddr);
241 * Get the hardware address for an ethernet interface .
243 * base_name - base name for device (normally "eth")
244 * index - device index number (0 for first)
245 * enetaddr - returns 6 byte hardware address
247 * Return true if the address is valid.
249 int eth_getenv_enetaddr_by_index(const char *base_name, int index,
252 int eth_init(void); /* Initialize the device */
253 int eth_send(void *packet, int length); /* Send a packet */
256 int eth_receive(void *packet, int length); /* Receive a packet*/
257 extern void (*push_packet)(void *packet, int length);
259 int eth_rx(void); /* Check for received packets */
260 void eth_halt(void); /* stop SCC */
261 const char *eth_get_name(void); /* get name of current device */
263 #ifdef CONFIG_MCAST_TFTP
264 int eth_mcast_join(struct in_addr mcast_addr, int join);
265 u32 ether_crc(size_t len, unsigned char const *p);
269 /**********************************************************************/
278 struct ethernet_hdr {
279 u8 et_dest[6]; /* Destination node */
280 u8 et_src[6]; /* Source node */
281 u16 et_protlen; /* Protocol or length */
284 /* Ethernet header size */
285 #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr))
287 #define ETH_FCS_LEN 4 /* Octets in the FCS */
290 u8 et_dest[6]; /* Destination node */
291 u8 et_src[6]; /* Source node */
292 u16 et_protlen; /* Protocol or length */
293 u8 et_dsap; /* 802 DSAP */
294 u8 et_ssap; /* 802 SSAP */
295 u8 et_ctl; /* 802 control */
296 u8 et_snap1; /* SNAP */
299 u16 et_prot; /* 802 protocol */
302 /* 802 + SNAP + ethernet header size */
303 #define E802_HDR_SIZE (sizeof(struct e802_hdr))
306 * Virtual LAN Ethernet header
308 struct vlan_ethernet_hdr {
309 u8 vet_dest[6]; /* Destination node */
310 u8 vet_src[6]; /* Source node */
311 u16 vet_vlan_type; /* PROT_VLAN */
312 u16 vet_tag; /* TAG of VLAN */
313 u16 vet_type; /* protocol type */
316 /* VLAN Ethernet header size */
317 #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr))
319 #define PROT_IP 0x0800 /* IP protocol */
320 #define PROT_ARP 0x0806 /* IP ARP protocol */
321 #define PROT_RARP 0x8035 /* IP ARP protocol */
322 #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */
324 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
325 #define IPPROTO_UDP 17 /* User Datagram Protocol */
328 * Internet Protocol (IP) header.
331 u8 ip_hl_v; /* header length and version */
332 u8 ip_tos; /* type of service */
333 u16 ip_len; /* total length */
334 u16 ip_id; /* identification */
335 u16 ip_off; /* fragment offset field */
336 u8 ip_ttl; /* time to live */
337 u8 ip_p; /* protocol */
338 u16 ip_sum; /* checksum */
339 struct in_addr ip_src; /* Source IP address */
340 struct in_addr ip_dst; /* Destination IP address */
343 #define IP_OFFS 0x1fff /* ip offset *= 8 */
344 #define IP_FLAGS 0xe000 /* first 3 bits */
345 #define IP_FLAGS_RES 0x8000 /* reserved */
346 #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */
347 #define IP_FLAGS_MFRAG 0x2000 /* more fragments */
349 #define IP_HDR_SIZE (sizeof(struct ip_hdr))
352 * Internet Protocol (IP) + UDP header.
355 u8 ip_hl_v; /* header length and version */
356 u8 ip_tos; /* type of service */
357 u16 ip_len; /* total length */
358 u16 ip_id; /* identification */
359 u16 ip_off; /* fragment offset field */
360 u8 ip_ttl; /* time to live */
361 u8 ip_p; /* protocol */
362 u16 ip_sum; /* checksum */
363 struct in_addr ip_src; /* Source IP address */
364 struct in_addr ip_dst; /* Destination IP address */
365 u16 udp_src; /* UDP source port */
366 u16 udp_dst; /* UDP destination port */
367 u16 udp_len; /* Length of UDP packet */
368 u16 udp_xsum; /* Checksum */
371 #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr))
372 #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE)
375 * Address Resolution Protocol (ARP) header.
378 u16 ar_hrd; /* Format of hardware address */
379 # define ARP_ETHER 1 /* Ethernet hardware address */
380 u16 ar_pro; /* Format of protocol address */
381 u8 ar_hln; /* Length of hardware address */
383 u8 ar_pln; /* Length of protocol address */
385 u16 ar_op; /* Operation */
386 # define ARPOP_REQUEST 1 /* Request to resolve address */
387 # define ARPOP_REPLY 2 /* Response to previous request */
389 # define RARPOP_REQUEST 3 /* Request to resolve address */
390 # define RARPOP_REPLY 4 /* Response to previous request */
393 * The remaining fields are variable in size, according to
394 * the sizes above, and are defined as appropriate for
395 * specific hardware/protocol combinations.
398 #define ar_sha ar_data[0]
399 #define ar_spa ar_data[ARP_HLEN]
400 #define ar_tha ar_data[ARP_HLEN + ARP_PLEN]
401 #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN]
403 u8 ar_sha[]; /* Sender hardware address */
404 u8 ar_spa[]; /* Sender protocol address */
405 u8 ar_tha[]; /* Target hardware address */
406 u8 ar_tpa[]; /* Target protocol address */
410 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
413 * ICMP stuff (just enough to handle (host) redirect messages)
415 #define ICMP_ECHO_REPLY 0 /* Echo reply */
416 #define ICMP_NOT_REACH 3 /* Detination unreachable */
417 #define ICMP_REDIRECT 5 /* Redirect (change route) */
418 #define ICMP_ECHO_REQUEST 8 /* Echo request */
420 /* Codes for REDIRECT. */
421 #define ICMP_REDIR_NET 0 /* Redirect Net */
422 #define ICMP_REDIR_HOST 1 /* Redirect Host */
424 /* Codes for NOT_REACH */
425 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */
445 #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr))
446 #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE)
449 * Maximum packet size; used to allocate packet storage.
450 * TFTP packets can be 524 bytes + IP header + ethernet header.
451 * Lets be conservative, and go for 38 * 16. (Must also be
452 * a multiple of 32 bytes).
455 * AS.HARNOIS : Better to set PKTSIZE to maximum size because
456 * traffic type is not always controlled
457 * maximum packet size = 1518
458 * maximum packet size and multiple of 32 bytes = 1536
461 #define PKTSIZE_ALIGN 1536
462 /*#define PKTSIZE 608*/
465 * Maximum receive ring size; that is, the number of packets
466 * we can buffer before overflow happens. Basically, this just
467 * needs to be enough to prevent a packet being discarded while
468 * we are processing the previous one.
471 #define RINGSZ_LOG2 2
473 /**********************************************************************/
479 * All variables of type struct in_addr are stored in NETWORK byte order
484 /** BOOTP EXTENTIONS **/
485 extern struct in_addr net_gateway; /* Our gateway IP address */
486 extern struct in_addr net_netmask; /* Our subnet mask (0 = unknown) */
487 /* Our Domain Name Server (0 = unknown) */
488 extern struct in_addr net_dns_server;
489 #if defined(CONFIG_BOOTP_DNS2)
490 /* Our 2nd Domain Name Server (0 = unknown) */
491 extern struct in_addr net_dns_server2;
493 extern char net_nis_domain[32]; /* Our IS domain */
494 extern char net_hostname[32]; /* Our hostname */
495 extern char net_root_path[64]; /* Our root path */
496 /** END OF BOOTP EXTENTIONS **/
497 extern u8 net_ethaddr[6]; /* Our ethernet address */
498 extern u8 net_server_ethaddr[6]; /* Boot server enet address */
499 extern struct in_addr net_ip; /* Our IP addr (0 = unknown) */
500 extern struct in_addr net_server_ip; /* Server IP addr (0 = unknown) */
501 extern uchar *net_tx_packet; /* THE transmit packet */
502 extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */
503 extern uchar *net_rx_packet; /* Current receive packet */
504 extern int net_rx_packet_len; /* Current rx packet length */
505 extern const u8 net_bcast_ethaddr[6]; /* Ethernet broadcast address */
506 extern const u8 net_null_ethaddr[6];
508 #define VLAN_NONE 4095 /* untagged */
509 #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */
510 extern ushort net_our_vlan; /* Our VLAN */
511 extern ushort net_native_vlan; /* Our Native VLAN */
513 extern int net_restart_wrap; /* Tried all network devices */
516 BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
517 TFTPSRV, TFTPPUT, LINKLOCAL
520 extern char net_boot_file_name[1024];/* Boot File name */
521 /* The actual transferred size of the bootfile (in bytes) */
522 extern u32 net_boot_file_size;
523 /* Boot file size in blocks as reported by the DHCP server */
524 extern u32 net_boot_file_expected_size_in_blocks;
526 #if defined(CONFIG_CMD_DNS)
527 extern char *net_dns_resolve; /* The host to resolve */
528 extern char *net_dns_env_var; /* the env var to put the ip into */
531 #if defined(CONFIG_CMD_PING)
532 extern struct in_addr net_ping_ip; /* the ip address to ping */
535 #if defined(CONFIG_CMD_CDP)
536 /* when CDP completes these hold the return values */
537 extern ushort cdp_native_vlan; /* CDP returned native VLAN */
538 extern ushort cdp_appliance_vlan; /* CDP returned appliance VLAN */
541 * Check for a CDP packet by examining the received MAC address field
543 static inline int is_cdp_packet(const uchar *ethaddr)
545 extern const u8 net_cdp_ethaddr[6];
547 return memcmp(ethaddr, net_cdp_ethaddr, 6) == 0;
551 #if defined(CONFIG_CMD_SNTP)
552 extern struct in_addr net_ntp_server; /* the ip address to NTP */
553 extern int net_ntp_time_offset; /* offset time from UTC */
556 #if defined(CONFIG_MCAST_TFTP)
557 extern struct in_addr net_mcast_addr;
560 /* Initialize the network adapter */
562 int net_loop(enum proto_t);
564 /* Load failed. Start again. */
565 int net_start_again(void);
567 /* Get size of the ethernet header when we send */
568 int net_eth_hdr_size(void);
570 /* Set ethernet header; returns the size of the header */
571 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot);
572 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot);
575 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source);
576 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport,
580 * compute_ip_checksum() - Compute IP checksum
582 * @addr: Address to check (must be 16-bit aligned)
583 * @nbytes: Number of bytes to check (normally a multiple of 2)
584 * @return 16-bit IP checksum
586 unsigned compute_ip_checksum(const void *addr, unsigned nbytes);
589 * add_ip_checksums() - add two IP checksums
591 * @offset: Offset of first sum (if odd we do a byte-swap)
592 * @sum: First checksum
593 * @new_sum: New checksum to add
594 * @return updated 16-bit IP checksum
596 unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum);
599 * ip_checksum_ok() - check if a checksum is correct
601 * This works by making sure the checksum sums to 0
603 * @addr: Address to check (must be 16-bit aligned)
604 * @nbytes: Number of bytes to check (normally a multiple of 2)
605 * @return true if the checksum matches, false if not
607 int ip_checksum_ok(const void *addr, unsigned nbytes);
610 rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */
611 void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */
612 rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */
613 void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */
614 void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
615 void net_set_timeout_handler(ulong, thand_f *);/* Set timeout handler */
617 /* Network loop state */
618 enum net_loop_state {
624 extern enum net_loop_state net_state;
626 static inline void net_set_state(enum net_loop_state state)
628 debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state);
632 /* Transmit a packet */
633 static inline void net_send_packet(uchar *pkt, int len)
635 /* Currently no way to return errors from eth_send() */
636 (void) eth_send(pkt, len);
640 * Transmit "net_tx_packet" as UDP packet, performing ARP request if needed
641 * (ether will be populated)
643 * @param ether Raw packet buffer
644 * @param dest IP address to send the datagram to
645 * @param dport Destination UDP port
646 * @param sport Source UDP port
647 * @param payload_len Length of data after the UDP header
649 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport,
650 int sport, int payload_len);
652 /* Processes a received packet */
653 void net_process_received_packet(uchar *in_packet, int len);
655 #ifdef CONFIG_NETCONSOLE
657 int nc_input_packet(uchar *pkt, struct in_addr src_ip, unsigned dest_port,
658 unsigned src_port, unsigned len);
661 static __always_inline int eth_is_on_demand_init(void)
663 #ifdef CONFIG_NETCONSOLE
664 extern enum proto_t net_loop_last_protocol;
666 return net_loop_last_protocol != NETCONS;
672 static inline void eth_set_last_protocol(int protocol)
674 #ifdef CONFIG_NETCONSOLE
675 extern enum proto_t net_loop_last_protocol;
677 net_loop_last_protocol = protocol;
682 * Check if autoload is enabled. If so, use either NFS or TFTP to download
685 void net_auto_load(void);
688 * The following functions are a bit ugly, but necessary to deal with
689 * alignment restrictions on ARM.
691 * We're using inline functions, which had the smallest memory
692 * footprint in our tests.
694 /* return IP *in network byteorder* */
695 static inline struct in_addr net_read_ip(void *from)
699 memcpy((void *)&ip, (void *)from, sizeof(ip));
703 /* return ulong *in network byteorder* */
704 static inline u32 net_read_u32(u32 *from)
708 memcpy((void *)&l, (void *)from, sizeof(l));
712 /* write IP *in network byteorder* */
713 static inline void net_write_ip(void *to, struct in_addr ip)
715 memcpy(to, (void *)&ip, sizeof(ip));
719 static inline void net_copy_ip(void *to, void *from)
721 memcpy((void *)to, from, sizeof(struct in_addr));
725 static inline void net_copy_u32(u32 *to, u32 *from)
727 memcpy((void *)to, (void *)from, sizeof(u32));
731 * is_zero_ethaddr - Determine if give Ethernet address is all zeros.
732 * @addr: Pointer to a six-byte array containing the Ethernet address
734 * Return true if the address is all zeroes.
736 static inline int is_zero_ethaddr(const u8 *addr)
738 return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
742 * is_multicast_ethaddr - Determine if the Ethernet address is a multicast.
743 * @addr: Pointer to a six-byte array containing the Ethernet address
745 * Return true if the address is a multicast address.
746 * By definition the broadcast address is also a multicast address.
748 static inline int is_multicast_ethaddr(const u8 *addr)
750 return 0x01 & addr[0];
754 * is_broadcast_ethaddr - Determine if the Ethernet address is broadcast
755 * @addr: Pointer to a six-byte array containing the Ethernet address
757 * Return true if the address is the broadcast address.
759 static inline int is_broadcast_ethaddr(const u8 *addr)
761 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) ==
766 * is_valid_ethaddr - Determine if the given Ethernet address is valid
767 * @addr: Pointer to a six-byte array containing the Ethernet address
769 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
770 * a multicast address, and is not FF:FF:FF:FF:FF:FF.
772 * Return true if the address is valid.
774 static inline int is_valid_ethaddr(const u8 *addr)
776 /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
777 * explicitly check for it here. */
778 return !is_multicast_ethaddr(addr) && !is_zero_ethaddr(addr);
782 * net_random_ethaddr - Generate software assigned random Ethernet address
783 * @addr: Pointer to a six-byte array containing the Ethernet address
785 * Generate a random Ethernet address (MAC) that is not multicast
786 * and has the local assigned bit set.
788 static inline void net_random_ethaddr(uchar *addr)
791 unsigned int seed = get_timer(0);
793 for (i = 0; i < 6; i++)
794 addr[i] = rand_r(&seed);
796 addr[0] &= 0xfe; /* clear multicast bit */
797 addr[0] |= 0x02; /* set local assignment bit (IEEE802) */
800 /* Convert an IP address to a string */
801 void ip_to_string(struct in_addr x, char *s);
803 /* Convert a string to ip address */
804 struct in_addr string_to_ip(const char *s);
806 /* Convert a VLAN id to a string */
807 void vlan_to_string(ushort x, char *s);
809 /* Convert a string to a vlan id */
810 ushort string_to_vlan(const char *s);
812 /* read a VLAN id from an environment variable */
813 ushort getenv_vlan(char *);
815 /* copy a filename (allow for "..." notation, limit length) */
816 void copy_filename(char *dst, const char *src, int size);
818 /* get a random source port */
819 unsigned int random_port(void);
822 * update_tftp - Update firmware over TFTP (via DFU)
824 * This function updates board's firmware via TFTP
826 * @param addr - memory address where data is stored
827 * @param interface - the DFU medium name - e.g. "mmc"
828 * @param devstring - the DFU medium number - e.g. "1"
830 * @return - 0 on success, other value on failure
832 int update_tftp(ulong addr, char *interface, char *devstring);
834 /**********************************************************************/
836 #endif /* __NET_H__ */