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 */
42 typedef __be32 IPaddr_t;
46 * An incoming packet handler.
47 * @param pkt pointer to the application packet
48 * @param dport destination UDP port
49 * @param sip source IP address
50 * @param sport source UDP port
51 * @param len packet length
53 typedef void rxhand_f(uchar *pkt, unsigned dport,
54 IPaddr_t sip, unsigned sport,
58 * An incoming ICMP packet handler.
59 * @param type ICMP type
60 * @param code ICMP code
61 * @param dport destination UDP port
62 * @param sip source IP address
63 * @param sport source UDP port
64 * @param pkt pointer to the ICMP packet data
65 * @param len packet length
67 typedef void rxhand_icmp_f(unsigned type, unsigned code, unsigned dport,
68 IPaddr_t sip, unsigned sport, uchar *pkt, unsigned len);
71 * A timeout handler. Called after time interval has expired.
73 typedef void thand_f(void);
83 * struct eth_pdata - Platform data for Ethernet MAC controllers
85 * @iobase: The base address of the hardware registers
86 * @enetaddr: The Ethernet MAC address that is loaded from EEPROM or env
90 unsigned char enetaddr[6];
94 * struct eth_ops - functions of Ethernet MAC controllers
96 * start: Prepare the hardware to send and receive packets
97 * send: Send the bytes passed in "packet" as a packet on the wire
98 * recv: Check if the hardware received a packet. If so, set the pointer to the
99 * packet buffer in the packetp parameter. If not, return an error or 0 to
100 * indicate that the hardware receive FIFO is empty. If 0 is returned, the
101 * network stack will not process the empty packet, but free_pkt() will be
103 * free_pkt: Give the driver an opportunity to manage its packet buffer memory
104 * when the network stack is finished processing it. This will only be
105 * called when no error was returned from recv - optional
106 * stop: Stop the hardware from looking for packets - may be called even if
108 * mcast: Join or leave a multicast group (for TFTP) - optional
109 * write_hwaddr: Write a MAC address to the hardware (used to pass it to Linux
110 * on some platforms like ARM). This function expects the
111 * eth_pdata::enetaddr field to be populated - optional
112 * read_rom_hwaddr: Some devices have a backup of the MAC address stored in a
113 * ROM on the board. This is how the driver should expose it
114 * to the network stack. This function should fill in the
115 * eth_pdata::enetaddr field - optional
118 int (*start)(struct udevice *dev);
119 int (*send)(struct udevice *dev, void *packet, int length);
120 int (*recv)(struct udevice *dev, uchar **packetp);
121 int (*free_pkt)(struct udevice *dev, uchar *packet, int length);
122 void (*stop)(struct udevice *dev);
123 #ifdef CONFIG_MCAST_TFTP
124 int (*mcast)(struct udevice *dev, const u8 *enetaddr, int join);
126 int (*write_hwaddr)(struct udevice *dev);
127 int (*read_rom_hwaddr)(struct udevice *dev);
130 #define eth_get_ops(dev) ((struct eth_ops *)(dev)->driver->ops)
132 struct udevice *eth_get_dev(void); /* get the current device */
134 * The devname can be either an exact name given by the driver or device tree
135 * or it can be an alias of the form "eth%d"
137 struct udevice *eth_get_dev_by_name(const char *devname);
138 unsigned char *eth_get_ethaddr(void); /* get the current device MAC */
139 /* Used only when NetConsole is enabled */
140 int eth_init_state_only(void); /* Set active state */
141 void eth_halt_state_only(void); /* Set passive state */
144 #ifndef CONFIG_DM_ETH
147 unsigned char enetaddr[6];
151 int (*init) (struct eth_device *, bd_t *);
152 int (*send) (struct eth_device *, void *packet, int length);
153 int (*recv) (struct eth_device *);
154 void (*halt) (struct eth_device *);
155 #ifdef CONFIG_MCAST_TFTP
156 int (*mcast) (struct eth_device *, const u8 *enetaddr, u8 set);
158 int (*write_hwaddr) (struct eth_device *);
159 struct eth_device *next;
164 int eth_register(struct eth_device *dev);/* Register network device */
165 int eth_unregister(struct eth_device *dev);/* Remove network device */
167 extern struct eth_device *eth_current;
169 static inline __attribute__((always_inline))
170 struct eth_device *eth_get_dev(void)
174 struct eth_device *eth_get_dev_by_name(const char *devname);
175 struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */
177 /* get the current device MAC */
178 static inline unsigned char *eth_get_ethaddr(void)
181 return eth_current->enetaddr;
185 /* Set active state */
186 static inline __attribute__((always_inline)) int eth_init_state_only(void)
188 eth_get_dev()->state = ETH_STATE_ACTIVE;
192 /* Set passive state */
193 static inline __attribute__((always_inline)) void eth_halt_state_only(void)
195 eth_get_dev()->state = ETH_STATE_PASSIVE;
199 * Set the hardware address for an ethernet interface based on 'eth%daddr'
200 * environment variable (or just 'ethaddr' if eth_number is 0).
202 * base_name - base name for device (normally "eth")
203 * eth_number - value of %d (0 for first device of this type)
205 * 0 is success, non-zero is error status from driver.
207 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
210 int usb_eth_initialize(bd_t *bi);
213 int eth_initialize(void); /* Initialize network subsystem */
214 void eth_try_another(int first_restart); /* Change the device */
215 void eth_set_current(void); /* set nterface to ethcur var */
217 int eth_get_dev_index(void); /* get the device index */
218 void eth_parse_enetaddr(const char *addr, uchar *enetaddr);
219 int eth_getenv_enetaddr(char *name, uchar *enetaddr);
220 int eth_setenv_enetaddr(char *name, const uchar *enetaddr);
223 * Get the hardware address for an ethernet interface .
225 * base_name - base name for device (normally "eth")
226 * index - device index number (0 for first)
227 * enetaddr - returns 6 byte hardware address
229 * Return true if the address is valid.
231 int eth_getenv_enetaddr_by_index(const char *base_name, int index,
234 int eth_init(void); /* Initialize the device */
235 int eth_send(void *packet, int length); /* Send a packet */
238 int eth_receive(void *packet, int length); /* Receive a packet*/
239 extern void (*push_packet)(void *packet, int length);
241 int eth_rx(void); /* Check for received packets */
242 void eth_halt(void); /* stop SCC */
243 const char *eth_get_name(void); /* get name of current device */
245 #ifdef CONFIG_MCAST_TFTP
246 int eth_mcast_join(IPaddr_t mcast_addr, int join);
247 u32 ether_crc(size_t len, unsigned char const *p);
251 /**********************************************************************/
260 struct ethernet_hdr {
261 uchar et_dest[6]; /* Destination node */
262 uchar et_src[6]; /* Source node */
263 ushort et_protlen; /* Protocol or length */
266 /* Ethernet header size */
267 #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr))
269 #define ETH_FCS_LEN 4 /* Octets in the FCS */
272 uchar et_dest[6]; /* Destination node */
273 uchar et_src[6]; /* Source node */
274 ushort et_protlen; /* Protocol or length */
275 uchar et_dsap; /* 802 DSAP */
276 uchar et_ssap; /* 802 SSAP */
277 uchar et_ctl; /* 802 control */
278 uchar et_snap1; /* SNAP */
281 ushort et_prot; /* 802 protocol */
284 /* 802 + SNAP + ethernet header size */
285 #define E802_HDR_SIZE (sizeof(struct e802_hdr))
288 * Virtual LAN Ethernet header
290 struct vlan_ethernet_hdr {
291 uchar vet_dest[6]; /* Destination node */
292 uchar vet_src[6]; /* Source node */
293 ushort vet_vlan_type; /* PROT_VLAN */
294 ushort vet_tag; /* TAG of VLAN */
295 ushort vet_type; /* protocol type */
298 /* VLAN Ethernet header size */
299 #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr))
301 #define PROT_IP 0x0800 /* IP protocol */
302 #define PROT_ARP 0x0806 /* IP ARP protocol */
303 #define PROT_RARP 0x8035 /* IP ARP protocol */
304 #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */
306 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
307 #define IPPROTO_UDP 17 /* User Datagram Protocol */
310 * Internet Protocol (IP) header.
313 uchar ip_hl_v; /* header length and version */
314 uchar ip_tos; /* type of service */
315 ushort ip_len; /* total length */
316 ushort ip_id; /* identification */
317 ushort ip_off; /* fragment offset field */
318 uchar ip_ttl; /* time to live */
319 uchar ip_p; /* protocol */
320 ushort ip_sum; /* checksum */
321 IPaddr_t ip_src; /* Source IP address */
322 IPaddr_t ip_dst; /* Destination IP address */
325 #define IP_OFFS 0x1fff /* ip offset *= 8 */
326 #define IP_FLAGS 0xe000 /* first 3 bits */
327 #define IP_FLAGS_RES 0x8000 /* reserved */
328 #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */
329 #define IP_FLAGS_MFRAG 0x2000 /* more fragments */
331 #define IP_HDR_SIZE (sizeof(struct ip_hdr))
334 * Internet Protocol (IP) + UDP header.
337 uchar ip_hl_v; /* header length and version */
338 uchar ip_tos; /* type of service */
339 ushort ip_len; /* total length */
340 ushort ip_id; /* identification */
341 ushort ip_off; /* fragment offset field */
342 uchar ip_ttl; /* time to live */
343 uchar ip_p; /* protocol */
344 ushort ip_sum; /* checksum */
345 IPaddr_t ip_src; /* Source IP address */
346 IPaddr_t ip_dst; /* Destination IP address */
347 ushort udp_src; /* UDP source port */
348 ushort udp_dst; /* UDP destination port */
349 ushort udp_len; /* Length of UDP packet */
350 ushort udp_xsum; /* Checksum */
353 #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr))
354 #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE)
357 * Address Resolution Protocol (ARP) header.
360 ushort ar_hrd; /* Format of hardware address */
361 # define ARP_ETHER 1 /* Ethernet hardware address */
362 ushort ar_pro; /* Format of protocol address */
363 uchar ar_hln; /* Length of hardware address */
365 uchar ar_pln; /* Length of protocol address */
367 ushort ar_op; /* Operation */
368 # define ARPOP_REQUEST 1 /* Request to resolve address */
369 # define ARPOP_REPLY 2 /* Response to previous request */
371 # define RARPOP_REQUEST 3 /* Request to resolve address */
372 # define RARPOP_REPLY 4 /* Response to previous request */
375 * The remaining fields are variable in size, according to
376 * the sizes above, and are defined as appropriate for
377 * specific hardware/protocol combinations.
380 #define ar_sha ar_data[0]
381 #define ar_spa ar_data[ARP_HLEN]
382 #define ar_tha ar_data[ARP_HLEN + ARP_PLEN]
383 #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN]
385 uchar ar_sha[]; /* Sender hardware address */
386 uchar ar_spa[]; /* Sender protocol address */
387 uchar ar_tha[]; /* Target hardware address */
388 uchar ar_tpa[]; /* Target protocol address */
392 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
395 * ICMP stuff (just enough to handle (host) redirect messages)
397 #define ICMP_ECHO_REPLY 0 /* Echo reply */
398 #define ICMP_NOT_REACH 3 /* Detination unreachable */
399 #define ICMP_REDIRECT 5 /* Redirect (change route) */
400 #define ICMP_ECHO_REQUEST 8 /* Echo request */
402 /* Codes for REDIRECT. */
403 #define ICMP_REDIR_NET 0 /* Redirect Net */
404 #define ICMP_REDIR_HOST 1 /* Redirect Host */
406 /* Codes for NOT_REACH */
407 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */
427 #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr))
428 #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE)
431 * Maximum packet size; used to allocate packet storage.
432 * TFTP packets can be 524 bytes + IP header + ethernet header.
433 * Lets be conservative, and go for 38 * 16. (Must also be
434 * a multiple of 32 bytes).
437 * AS.HARNOIS : Better to set PKTSIZE to maximum size because
438 * traffic type is not always controlled
439 * maximum packet size = 1518
440 * maximum packet size and multiple of 32 bytes = 1536
443 #define PKTSIZE_ALIGN 1536
444 /*#define PKTSIZE 608*/
447 * Maximum receive ring size; that is, the number of packets
448 * we can buffer before overflow happens. Basically, this just
449 * needs to be enough to prevent a packet being discarded while
450 * we are processing the previous one.
453 #define RINGSZ_LOG2 2
455 /**********************************************************************/
461 * All variables of type IPaddr_t are stored in NETWORK byte order
466 /** BOOTP EXTENTIONS **/
467 extern IPaddr_t NetOurGatewayIP; /* Our gateway IP address */
468 extern IPaddr_t NetOurSubnetMask; /* Our subnet mask (0 = unknown) */
469 extern IPaddr_t NetOurDNSIP; /* Our Domain Name Server (0 = unknown) */
470 #if defined(CONFIG_BOOTP_DNS2)
471 extern IPaddr_t NetOurDNS2IP; /* Our 2nd Domain Name Server (0 = unknown) */
473 extern char NetOurNISDomain[32]; /* Our NIS domain */
474 extern char NetOurHostName[32]; /* Our hostname */
475 extern char NetOurRootPath[64]; /* Our root path */
476 extern ushort NetBootFileSize; /* Our boot file size in blocks */
477 /** END OF BOOTP EXTENTIONS **/
478 extern ulong NetBootFileXferSize; /* size of bootfile in bytes */
479 extern uchar NetOurEther[6]; /* Our ethernet address */
480 extern uchar NetServerEther[6]; /* Boot server enet address */
481 extern IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
482 extern IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */
483 extern uchar *NetTxPacket; /* THE transmit packet */
485 extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */
487 extern uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */
489 extern uchar *NetRxPacket; /* Current receive packet */
490 extern int NetRxPacketLen; /* Current rx packet length */
491 extern unsigned NetIPID; /* IP ID (counting) */
492 extern uchar NetBcastAddr[6]; /* Ethernet boardcast address */
493 extern uchar NetEtherNullAddr[6];
495 #define VLAN_NONE 4095 /* untagged */
496 #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */
497 extern ushort NetOurVLAN; /* Our VLAN */
498 extern ushort NetOurNativeVLAN; /* Our Native VLAN */
500 extern int NetRestartWrap; /* Tried all network devices */
503 BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
504 TFTPSRV, TFTPPUT, LINKLOCAL
508 extern char BootFile[128]; /* Boot File name */
510 #if defined(CONFIG_CMD_DNS)
511 extern char *NetDNSResolve; /* The host to resolve */
512 extern char *NetDNSenvvar; /* the env var to put the ip into */
515 #if defined(CONFIG_CMD_PING)
516 extern IPaddr_t NetPingIP; /* the ip address to ping */
519 #if defined(CONFIG_CMD_CDP)
520 /* when CDP completes these hold the return values */
521 extern ushort CDPNativeVLAN; /* CDP returned native VLAN */
522 extern ushort CDPApplianceVLAN; /* CDP returned appliance VLAN */
525 * Check for a CDP packet by examining the received MAC address field
527 static inline int is_cdp_packet(const uchar *et_addr)
529 extern const uchar NetCDPAddr[6];
531 return memcmp(et_addr, NetCDPAddr, 6) == 0;
535 #if defined(CONFIG_CMD_SNTP)
536 extern IPaddr_t NetNtpServerIP; /* the ip address to NTP */
537 extern int NetTimeOffset; /* offset time from UTC */
540 #if defined(CONFIG_MCAST_TFTP)
541 extern IPaddr_t Mcast_addr;
544 /* Initialize the network adapter */
546 int NetLoop(enum proto_t);
548 /* Shutdown adapters and cleanup */
551 /* Load failed. Start again. */
552 int NetStartAgain(void);
554 /* Get size of the ethernet header when we send */
555 int NetEthHdrSize(void);
557 /* Set ethernet header; returns the size of the header */
558 int NetSetEther(uchar *, uchar *, uint);
559 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot);
562 void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source);
563 void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport,
567 * compute_ip_checksum() - Compute IP checksum
569 * @addr: Address to check (must be 16-bit aligned)
570 * @nbytes: Number of bytes to check (normally a multiple of 2)
571 * @return 16-bit IP checksum
573 unsigned compute_ip_checksum(const void *addr, unsigned nbytes);
576 * add_ip_checksums() - add two IP checksums
578 * @offset: Offset of first sum (if odd we do a byte-swap)
579 * @sum: First checksum
580 * @new_sum: New checksum to add
581 * @return updated 16-bit IP checksum
583 unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum);
586 * ip_checksum_ok() - check if a checksum is correct
588 * This works by making sure the checksum sums to 0
590 * @addr: Address to check (must be 16-bit aligned)
591 * @nbytes: Number of bytes to check (normally a multiple of 2)
592 * @return true if the checksum matches, false if not
594 int ip_checksum_ok(const void *addr, unsigned nbytes);
597 rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */
598 void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */
599 rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */
600 void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */
601 void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
602 void NetSetTimeout(ulong, thand_f *);/* Set timeout handler */
604 /* Network loop state */
605 enum net_loop_state {
611 extern enum net_loop_state net_state;
613 static inline void net_set_state(enum net_loop_state state)
615 debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state);
619 /* Transmit a packet */
620 static inline void NetSendPacket(uchar *pkt, int len)
622 /* Currently no way to return errors from eth_send() */
623 (void) eth_send(pkt, len);
627 * Transmit "NetTxPacket" as UDP packet, performing ARP request if needed
628 * (ether will be populated)
630 * @param ether Raw packet buffer
631 * @param dest IP address to send the datagram to
632 * @param dport Destination UDP port
633 * @param sport Source UDP port
634 * @param payload_len Length of data after the UDP header
636 int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport,
637 int sport, int payload_len);
639 #ifndef CONFIG_DM_ETH
640 #define NetReceive(in_packet, len) net_process_received_packet(in_packet, len)
642 /* Processes a received packet */
643 void net_process_received_packet(uchar *in_packet, int len);
645 #ifdef CONFIG_NETCONSOLE
647 int nc_input_packet(uchar *pkt, IPaddr_t src_ip, unsigned dest_port,
648 unsigned src_port, unsigned len);
651 static inline __attribute__((always_inline)) int eth_is_on_demand_init(void)
653 #ifdef CONFIG_NETCONSOLE
654 extern enum proto_t net_loop_last_protocol;
656 return net_loop_last_protocol != NETCONS;
662 static inline void eth_set_last_protocol(int protocol)
664 #ifdef CONFIG_NETCONSOLE
665 extern enum proto_t net_loop_last_protocol;
667 net_loop_last_protocol = protocol;
672 * Check if autoload is enabled. If so, use either NFS or TFTP to download
675 void net_auto_load(void);
678 * The following functions are a bit ugly, but necessary to deal with
679 * alignment restrictions on ARM.
681 * We're using inline functions, which had the smallest memory
682 * footprint in our tests.
684 /* return IP *in network byteorder* */
685 static inline IPaddr_t NetReadIP(void *from)
689 memcpy((void *)&ip, (void *)from, sizeof(ip));
693 /* return ulong *in network byteorder* */
694 static inline ulong NetReadLong(ulong *from)
698 memcpy((void *)&l, (void *)from, sizeof(l));
702 /* write IP *in network byteorder* */
703 static inline void NetWriteIP(void *to, IPaddr_t ip)
705 memcpy(to, (void *)&ip, sizeof(ip));
709 static inline void NetCopyIP(void *to, void *from)
711 memcpy((void *)to, from, sizeof(IPaddr_t));
715 static inline void NetCopyLong(ulong *to, ulong *from)
717 memcpy((void *)to, (void *)from, sizeof(ulong));
721 * is_zero_ether_addr - Determine if give Ethernet address is all zeros.
722 * @addr: Pointer to a six-byte array containing the Ethernet address
724 * Return true if the address is all zeroes.
726 static inline int is_zero_ether_addr(const u8 *addr)
728 return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
732 * is_multicast_ether_addr - Determine if the Ethernet address is a multicast.
733 * @addr: Pointer to a six-byte array containing the Ethernet address
735 * Return true if the address is a multicast address.
736 * By definition the broadcast address is also a multicast address.
738 static inline int is_multicast_ether_addr(const u8 *addr)
740 return 0x01 & addr[0];
744 * is_broadcast_ether_addr - Determine if the Ethernet address is broadcast
745 * @addr: Pointer to a six-byte array containing the Ethernet address
747 * Return true if the address is the broadcast address.
749 static inline int is_broadcast_ether_addr(const u8 *addr)
751 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) ==
756 * is_valid_ether_addr - Determine if the given Ethernet address is valid
757 * @addr: Pointer to a six-byte array containing the Ethernet address
759 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
760 * a multicast address, and is not FF:FF:FF:FF:FF:FF.
762 * Return true if the address is valid.
764 static inline int is_valid_ether_addr(const u8 *addr)
766 /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
767 * explicitly check for it here. */
768 return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr);
772 * eth_random_addr - Generate software assigned random Ethernet address
773 * @addr: Pointer to a six-byte array containing the Ethernet address
775 * Generate a random Ethernet address (MAC) that is not multicast
776 * and has the local assigned bit set.
778 static inline void eth_random_addr(uchar *addr)
781 unsigned int seed = get_timer(0);
783 for (i = 0; i < 6; i++)
784 addr[i] = rand_r(&seed);
786 addr[0] &= 0xfe; /* clear multicast bit */
787 addr[0] |= 0x02; /* set local assignment bit (IEEE802) */
790 /* Convert an IP address to a string */
791 void ip_to_string(IPaddr_t x, char *s);
793 /* Convert a string to ip address */
794 IPaddr_t string_to_ip(const char *s);
796 /* Convert a VLAN id to a string */
797 void VLAN_to_string(ushort x, char *s);
799 /* Convert a string to a vlan id */
800 ushort string_to_VLAN(const char *s);
802 /* read a VLAN id from an environment variable */
803 ushort getenv_VLAN(char *);
805 /* copy a filename (allow for "..." notation, limit length) */
806 void copy_filename(char *dst, const char *src, int size);
808 /* get a random source port */
809 unsigned int random_port(void);
811 /* Update U-Boot over TFTP */
812 int update_tftp(ulong addr);
814 /**********************************************************************/
816 #endif /* __NET_H__ */