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
101 * stop: Stop the hardware from looking for packets - may be called even if
103 * mcast: Join or leave a multicast group (for TFTP) - optional
104 * write_hwaddr: Write a MAC address to the hardware (used to pass it to Linux
105 * on some platforms like ARM). This function expects the
106 * eth_pdata::enetaddr field to be populated - optional
107 * read_rom_hwaddr: Some devices have a backup of the MAC address stored in a
108 * ROM on the board. This is how the driver should expose it
109 * to the network stack. This function should fill in the
110 * eth_pdata::enetaddr field - optional
113 int (*start)(struct udevice *dev);
114 int (*send)(struct udevice *dev, void *packet, int length);
115 int (*recv)(struct udevice *dev, uchar **packetp);
116 void (*stop)(struct udevice *dev);
117 #ifdef CONFIG_MCAST_TFTP
118 int (*mcast)(struct udevice *dev, const u8 *enetaddr, int join);
120 int (*write_hwaddr)(struct udevice *dev);
121 int (*read_rom_hwaddr)(struct udevice *dev);
124 #define eth_get_ops(dev) ((struct eth_ops *)(dev)->driver->ops)
126 struct udevice *eth_get_dev(void); /* get the current device */
128 * The devname can be either an exact name given by the driver or device tree
129 * or it can be an alias of the form "eth%d"
131 struct udevice *eth_get_dev_by_name(const char *devname);
132 unsigned char *eth_get_ethaddr(void); /* get the current device MAC */
133 /* Used only when NetConsole is enabled */
134 int eth_init_state_only(void); /* Set active state */
135 void eth_halt_state_only(void); /* Set passive state */
138 #ifndef CONFIG_DM_ETH
141 unsigned char enetaddr[6];
145 int (*init) (struct eth_device *, bd_t *);
146 int (*send) (struct eth_device *, void *packet, int length);
147 int (*recv) (struct eth_device *);
148 void (*halt) (struct eth_device *);
149 #ifdef CONFIG_MCAST_TFTP
150 int (*mcast) (struct eth_device *, const u8 *enetaddr, u8 set);
152 int (*write_hwaddr) (struct eth_device *);
153 struct eth_device *next;
158 int eth_register(struct eth_device *dev);/* Register network device */
159 int eth_unregister(struct eth_device *dev);/* Remove network device */
161 extern struct eth_device *eth_current;
163 static inline __attribute__((always_inline))
164 struct eth_device *eth_get_dev(void)
168 struct eth_device *eth_get_dev_by_name(const char *devname);
169 struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */
171 /* get the current device MAC */
172 static inline unsigned char *eth_get_ethaddr(void)
175 return eth_current->enetaddr;
179 /* Set active state */
180 static inline __attribute__((always_inline)) int eth_init_state_only(void)
182 eth_get_dev()->state = ETH_STATE_ACTIVE;
186 /* Set passive state */
187 static inline __attribute__((always_inline)) void eth_halt_state_only(void)
189 eth_get_dev()->state = ETH_STATE_PASSIVE;
193 * Set the hardware address for an ethernet interface based on 'eth%daddr'
194 * environment variable (or just 'ethaddr' if eth_number is 0).
196 * base_name - base name for device (normally "eth")
197 * eth_number - value of %d (0 for first device of this type)
199 * 0 is success, non-zero is error status from driver.
201 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
204 int usb_eth_initialize(bd_t *bi);
207 int eth_initialize(void); /* Initialize network subsystem */
208 void eth_try_another(int first_restart); /* Change the device */
209 void eth_set_current(void); /* set nterface to ethcur var */
211 int eth_get_dev_index(void); /* get the device index */
212 void eth_parse_enetaddr(const char *addr, uchar *enetaddr);
213 int eth_getenv_enetaddr(char *name, uchar *enetaddr);
214 int eth_setenv_enetaddr(char *name, const uchar *enetaddr);
217 * Get the hardware address for an ethernet interface .
219 * base_name - base name for device (normally "eth")
220 * index - device index number (0 for first)
221 * enetaddr - returns 6 byte hardware address
223 * Return true if the address is valid.
225 int eth_getenv_enetaddr_by_index(const char *base_name, int index,
228 int eth_init(void); /* Initialize the device */
229 int eth_send(void *packet, int length); /* Send a packet */
232 int eth_receive(void *packet, int length); /* Receive a packet*/
233 extern void (*push_packet)(void *packet, int length);
235 int eth_rx(void); /* Check for received packets */
236 void eth_halt(void); /* stop SCC */
237 const char *eth_get_name(void); /* get name of current device */
239 #ifdef CONFIG_MCAST_TFTP
240 int eth_mcast_join(IPaddr_t mcast_addr, int join);
241 u32 ether_crc(size_t len, unsigned char const *p);
245 /**********************************************************************/
254 struct ethernet_hdr {
255 uchar et_dest[6]; /* Destination node */
256 uchar et_src[6]; /* Source node */
257 ushort et_protlen; /* Protocol or length */
260 /* Ethernet header size */
261 #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr))
263 #define ETH_FCS_LEN 4 /* Octets in the FCS */
266 uchar et_dest[6]; /* Destination node */
267 uchar et_src[6]; /* Source node */
268 ushort et_protlen; /* Protocol or length */
269 uchar et_dsap; /* 802 DSAP */
270 uchar et_ssap; /* 802 SSAP */
271 uchar et_ctl; /* 802 control */
272 uchar et_snap1; /* SNAP */
275 ushort et_prot; /* 802 protocol */
278 /* 802 + SNAP + ethernet header size */
279 #define E802_HDR_SIZE (sizeof(struct e802_hdr))
282 * Virtual LAN Ethernet header
284 struct vlan_ethernet_hdr {
285 uchar vet_dest[6]; /* Destination node */
286 uchar vet_src[6]; /* Source node */
287 ushort vet_vlan_type; /* PROT_VLAN */
288 ushort vet_tag; /* TAG of VLAN */
289 ushort vet_type; /* protocol type */
292 /* VLAN Ethernet header size */
293 #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr))
295 #define PROT_IP 0x0800 /* IP protocol */
296 #define PROT_ARP 0x0806 /* IP ARP protocol */
297 #define PROT_RARP 0x8035 /* IP ARP protocol */
298 #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */
300 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
301 #define IPPROTO_UDP 17 /* User Datagram Protocol */
304 * Internet Protocol (IP) header.
307 uchar ip_hl_v; /* header length and version */
308 uchar ip_tos; /* type of service */
309 ushort ip_len; /* total length */
310 ushort ip_id; /* identification */
311 ushort ip_off; /* fragment offset field */
312 uchar ip_ttl; /* time to live */
313 uchar ip_p; /* protocol */
314 ushort ip_sum; /* checksum */
315 IPaddr_t ip_src; /* Source IP address */
316 IPaddr_t ip_dst; /* Destination IP address */
319 #define IP_OFFS 0x1fff /* ip offset *= 8 */
320 #define IP_FLAGS 0xe000 /* first 3 bits */
321 #define IP_FLAGS_RES 0x8000 /* reserved */
322 #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */
323 #define IP_FLAGS_MFRAG 0x2000 /* more fragments */
325 #define IP_HDR_SIZE (sizeof(struct ip_hdr))
328 * Internet Protocol (IP) + UDP header.
331 uchar ip_hl_v; /* header length and version */
332 uchar ip_tos; /* type of service */
333 ushort ip_len; /* total length */
334 ushort ip_id; /* identification */
335 ushort ip_off; /* fragment offset field */
336 uchar ip_ttl; /* time to live */
337 uchar ip_p; /* protocol */
338 ushort ip_sum; /* checksum */
339 IPaddr_t ip_src; /* Source IP address */
340 IPaddr_t ip_dst; /* Destination IP address */
341 ushort udp_src; /* UDP source port */
342 ushort udp_dst; /* UDP destination port */
343 ushort udp_len; /* Length of UDP packet */
344 ushort udp_xsum; /* Checksum */
347 #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr))
348 #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE)
351 * Address Resolution Protocol (ARP) header.
354 ushort ar_hrd; /* Format of hardware address */
355 # define ARP_ETHER 1 /* Ethernet hardware address */
356 ushort ar_pro; /* Format of protocol address */
357 uchar ar_hln; /* Length of hardware address */
359 uchar ar_pln; /* Length of protocol address */
361 ushort ar_op; /* Operation */
362 # define ARPOP_REQUEST 1 /* Request to resolve address */
363 # define ARPOP_REPLY 2 /* Response to previous request */
365 # define RARPOP_REQUEST 3 /* Request to resolve address */
366 # define RARPOP_REPLY 4 /* Response to previous request */
369 * The remaining fields are variable in size, according to
370 * the sizes above, and are defined as appropriate for
371 * specific hardware/protocol combinations.
374 #define ar_sha ar_data[0]
375 #define ar_spa ar_data[ARP_HLEN]
376 #define ar_tha ar_data[ARP_HLEN + ARP_PLEN]
377 #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN]
379 uchar ar_sha[]; /* Sender hardware address */
380 uchar ar_spa[]; /* Sender protocol address */
381 uchar ar_tha[]; /* Target hardware address */
382 uchar ar_tpa[]; /* Target protocol address */
386 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
389 * ICMP stuff (just enough to handle (host) redirect messages)
391 #define ICMP_ECHO_REPLY 0 /* Echo reply */
392 #define ICMP_NOT_REACH 3 /* Detination unreachable */
393 #define ICMP_REDIRECT 5 /* Redirect (change route) */
394 #define ICMP_ECHO_REQUEST 8 /* Echo request */
396 /* Codes for REDIRECT. */
397 #define ICMP_REDIR_NET 0 /* Redirect Net */
398 #define ICMP_REDIR_HOST 1 /* Redirect Host */
400 /* Codes for NOT_REACH */
401 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */
421 #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr))
422 #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE)
425 * Maximum packet size; used to allocate packet storage.
426 * TFTP packets can be 524 bytes + IP header + ethernet header.
427 * Lets be conservative, and go for 38 * 16. (Must also be
428 * a multiple of 32 bytes).
431 * AS.HARNOIS : Better to set PKTSIZE to maximum size because
432 * traffic type is not always controlled
433 * maximum packet size = 1518
434 * maximum packet size and multiple of 32 bytes = 1536
437 #define PKTSIZE_ALIGN 1536
438 /*#define PKTSIZE 608*/
441 * Maximum receive ring size; that is, the number of packets
442 * we can buffer before overflow happens. Basically, this just
443 * needs to be enough to prevent a packet being discarded while
444 * we are processing the previous one.
447 #define RINGSZ_LOG2 2
449 /**********************************************************************/
455 * All variables of type IPaddr_t are stored in NETWORK byte order
460 /** BOOTP EXTENTIONS **/
461 extern IPaddr_t NetOurGatewayIP; /* Our gateway IP address */
462 extern IPaddr_t NetOurSubnetMask; /* Our subnet mask (0 = unknown) */
463 extern IPaddr_t NetOurDNSIP; /* Our Domain Name Server (0 = unknown) */
464 #if defined(CONFIG_BOOTP_DNS2)
465 extern IPaddr_t NetOurDNS2IP; /* Our 2nd Domain Name Server (0 = unknown) */
467 extern char NetOurNISDomain[32]; /* Our NIS domain */
468 extern char NetOurHostName[32]; /* Our hostname */
469 extern char NetOurRootPath[64]; /* Our root path */
470 extern ushort NetBootFileSize; /* Our boot file size in blocks */
471 /** END OF BOOTP EXTENTIONS **/
472 extern ulong NetBootFileXferSize; /* size of bootfile in bytes */
473 extern uchar NetOurEther[6]; /* Our ethernet address */
474 extern uchar NetServerEther[6]; /* Boot server enet address */
475 extern IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
476 extern IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */
477 extern uchar *NetTxPacket; /* THE transmit packet */
479 extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */
481 extern uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */
483 extern uchar *NetRxPacket; /* Current receive packet */
484 extern int NetRxPacketLen; /* Current rx packet length */
485 extern unsigned NetIPID; /* IP ID (counting) */
486 extern uchar NetBcastAddr[6]; /* Ethernet boardcast address */
487 extern uchar NetEtherNullAddr[6];
489 #define VLAN_NONE 4095 /* untagged */
490 #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */
491 extern ushort NetOurVLAN; /* Our VLAN */
492 extern ushort NetOurNativeVLAN; /* Our Native VLAN */
494 extern int NetRestartWrap; /* Tried all network devices */
497 BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
498 TFTPSRV, TFTPPUT, LINKLOCAL, BOOTME
502 extern char BootFile[128]; /* Boot File name */
504 #if defined(CONFIG_CMD_DNS)
505 extern char *NetDNSResolve; /* The host to resolve */
506 extern char *NetDNSenvvar; /* the env var to put the ip into */
509 #if defined(CONFIG_CMD_PING)
510 extern IPaddr_t NetPingIP; /* the ip address to ping */
513 #if defined(CONFIG_CMD_CDP)
514 /* when CDP completes these hold the return values */
515 extern ushort CDPNativeVLAN; /* CDP returned native VLAN */
516 extern ushort CDPApplianceVLAN; /* CDP returned appliance VLAN */
519 * Check for a CDP packet by examining the received MAC address field
521 static inline int is_cdp_packet(const uchar *et_addr)
523 extern const uchar NetCDPAddr[6];
525 return memcmp(et_addr, NetCDPAddr, 6) == 0;
529 #if defined(CONFIG_CMD_SNTP)
530 extern IPaddr_t NetNtpServerIP; /* the ip address to NTP */
531 extern int NetTimeOffset; /* offset time from UTC */
534 #if defined(CONFIG_MCAST_TFTP)
535 extern IPaddr_t Mcast_addr;
538 /* Initialize the network adapter */
540 int NetLoop(enum proto_t);
542 /* Shutdown adapters and cleanup */
545 /* Load failed. Start again. */
546 void NetStartAgain(void);
548 /* Get size of the ethernet header when we send */
549 int NetEthHdrSize(void);
551 /* Set ethernet header; returns the size of the header */
552 int NetSetEther(uchar *, uchar *, uint);
553 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot);
556 void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source);
557 void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport,
561 * compute_ip_checksum() - Compute IP checksum
563 * @addr: Address to check (must be 16-bit aligned)
564 * @nbytes: Number of bytes to check (normally a multiple of 2)
565 * @return 16-bit IP checksum
567 unsigned compute_ip_checksum(const void *addr, unsigned nbytes);
570 * add_ip_checksums() - add two IP checksums
572 * @offset: Offset of first sum (if odd we do a byte-swap)
573 * @sum: First checksum
574 * @new_sum: New checksum to add
575 * @return updated 16-bit IP checksum
577 unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum);
580 * ip_checksum_ok() - check if a checksum is correct
582 * This works by making sure the checksum sums to 0
584 * @addr: Address to check (must be 16-bit aligned)
585 * @nbytes: Number of bytes to check (normally a multiple of 2)
586 * @return true if the checksum matches, false if not
588 int ip_checksum_ok(const void *addr, unsigned nbytes);
591 rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */
592 void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */
593 rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */
594 void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */
595 void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
596 void NetSetTimeout(ulong, thand_f *);/* Set timeout handler */
598 /* Network loop state */
599 enum net_loop_state {
605 extern enum net_loop_state net_state;
607 static inline void net_set_state(enum net_loop_state state)
609 debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state);
613 /* Transmit a packet */
614 static inline void NetSendPacket(uchar *pkt, int len)
616 (void) eth_send(pkt, len);
620 * Transmit "NetTxPacket" as UDP packet, performing ARP request if needed
621 * (ether will be populated)
623 * @param ether Raw packet buffer
624 * @param dest IP address to send the datagram to
625 * @param dport Destination UDP port
626 * @param sport Source UDP port
627 * @param payload_len Length of data after the UDP header
629 int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport,
630 int sport, int payload_len);
632 #ifndef CONFIG_DM_ETH
633 #define NetReceive(in_packet, len) net_process_received_packet(in_packet, len)
635 /* Processes a received packet */
636 void net_process_received_packet(uchar *in_packet, int len);
638 #ifdef CONFIG_NETCONSOLE
640 int nc_input_packet(uchar *pkt, IPaddr_t src_ip, unsigned dest_port,
641 unsigned src_port, unsigned len);
644 static inline __attribute__((always_inline)) int eth_is_on_demand_init(void)
646 #ifdef CONFIG_NETCONSOLE
647 extern enum proto_t net_loop_last_protocol;
649 return net_loop_last_protocol != NETCONS;
655 static inline void eth_set_last_protocol(int protocol)
657 #ifdef CONFIG_NETCONSOLE
658 extern enum proto_t net_loop_last_protocol;
660 net_loop_last_protocol = protocol;
663 #ifdef CONFIG_CMD_BOOTCE
664 void BootmeStart(void);
668 * Check if autoload is enabled. If so, use either NFS or TFTP to download
671 void net_auto_load(void);
674 * The following functions are a bit ugly, but necessary to deal with
675 * alignment restrictions on ARM.
677 * We're using inline functions, which had the smallest memory
678 * footprint in our tests.
680 /* return IP *in network byteorder* */
681 static inline IPaddr_t NetReadIP(void *from)
685 memcpy((void *)&ip, (void *)from, sizeof(ip));
689 /* return ulong *in network byteorder* */
690 static inline ulong NetReadLong(ulong *from)
694 memcpy((void *)&l, (void *)from, sizeof(l));
698 /* write IP *in network byteorder* */
699 static inline void NetWriteIP(void *to, IPaddr_t ip)
701 memcpy(to, (void *)&ip, sizeof(ip));
705 static inline void NetCopyIP(void *to, void *from)
707 memcpy((void *)to, from, sizeof(IPaddr_t));
711 static inline void NetCopyLong(ulong *to, ulong *from)
713 memcpy((void *)to, (void *)from, sizeof(ulong));
717 * is_zero_ether_addr - Determine if give Ethernet address is all zeros.
718 * @addr: Pointer to a six-byte array containing the Ethernet address
720 * Return true if the address is all zeroes.
722 static inline int is_zero_ether_addr(const u8 *addr)
724 return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
728 * is_multicast_ether_addr - Determine if the Ethernet address is a multicast.
729 * @addr: Pointer to a six-byte array containing the Ethernet address
731 * Return true if the address is a multicast address.
732 * By definition the broadcast address is also a multicast address.
734 static inline int is_multicast_ether_addr(const u8 *addr)
736 return 0x01 & addr[0];
740 * is_broadcast_ether_addr - Determine if the Ethernet address is broadcast
741 * @addr: Pointer to a six-byte array containing the Ethernet address
743 * Return true if the address is the broadcast address.
745 static inline int is_broadcast_ether_addr(const u8 *addr)
747 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) ==
752 * is_valid_ether_addr - Determine if the given Ethernet address is valid
753 * @addr: Pointer to a six-byte array containing the Ethernet address
755 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
756 * a multicast address, and is not FF:FF:FF:FF:FF:FF.
758 * Return true if the address is valid.
760 static inline int is_valid_ether_addr(const u8 *addr)
762 /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
763 * explicitly check for it here. */
764 return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr);
768 * eth_random_addr - Generate software assigned random Ethernet address
769 * @addr: Pointer to a six-byte array containing the Ethernet address
771 * Generate a random Ethernet address (MAC) that is not multicast
772 * and has the local assigned bit set.
774 static inline void eth_random_addr(uchar *addr)
777 unsigned int seed = get_timer(0);
779 for (i = 0; i < 6; i++)
780 addr[i] = rand_r(&seed);
782 addr[0] &= 0xfe; /* clear multicast bit */
783 addr[0] |= 0x02; /* set local assignment bit (IEEE802) */
786 /* Convert an IP address to a string */
787 void ip_to_string(IPaddr_t x, char *s);
789 /* Convert a string to ip address */
790 IPaddr_t string_to_ip(const char *s);
792 /* Convert a VLAN id to a string */
793 void VLAN_to_string(ushort x, char *s);
795 /* Convert a string to a vlan id */
796 ushort string_to_VLAN(const char *s);
798 /* read a VLAN id from an environment variable */
799 ushort getenv_VLAN(char *);
801 /* copy a filename (allow for "..." notation, limit length) */
802 void copy_filename(char *dst, const char *src, int size);
804 /* get a random source port */
805 unsigned int random_port(void);
807 /* Update U-Boot over TFTP */
808 int update_tftp(ulong addr);
810 /**********************************************************************/
812 #endif /* __NET_H__ */