2 * LiMon Monitor (LiMon) - Network.
4 * Copyright 1994 - 2000 Neil Russell.
6 * SPDX-License-Identifier: GPL-2.0
9 * 9/16/00 bor adapted to TQM823L/STK8xxL board, RARP/TFTP boot added
15 #if defined(CONFIG_8xx)
17 #endif /* CONFIG_8xx */
19 #include <asm/cache.h>
20 #include <asm/byteorder.h> /* for nton* / ntoh* stuff */
22 #define DEBUG_LL_STATE 0 /* Link local state machine changes */
23 #define DEBUG_DEV_PKT 0 /* Packets or info directed to the device */
24 #define DEBUG_NET_PKT 0 /* Packets on info on the network at large */
25 #define DEBUG_INT_STATE 0 /* Internal network state changes */
28 * The number of receive packet buffers, and the required packet buffer
29 * alignment in memory.
33 #ifdef CONFIG_SYS_RX_ETH_BUFFER
34 # define PKTBUFSRX CONFIG_SYS_RX_ETH_BUFFER
39 #define PKTALIGN ARCH_DMA_MINALIGN
41 /* IPv4 addresses are always 32 bits in size */
47 * An incoming packet handler.
48 * @param pkt pointer to the application packet
49 * @param dport destination UDP port
50 * @param sip source IP address
51 * @param sport source UDP port
52 * @param len packet length
54 typedef void rxhand_f(uchar *pkt, unsigned dport,
55 struct in_addr sip, unsigned sport,
59 * An incoming ICMP packet handler.
60 * @param type ICMP type
61 * @param code ICMP code
62 * @param dport destination UDP port
63 * @param sip source IP address
64 * @param sport source UDP port
65 * @param pkt pointer to the ICMP packet data
66 * @param len packet length
68 typedef void rxhand_icmp_f(unsigned type, unsigned code, unsigned dport,
69 struct in_addr sip, unsigned sport, uchar *pkt, unsigned len);
72 * A timeout handler. Called after time interval has expired.
74 typedef void thand_f(void);
84 * struct eth_pdata - Platform data for Ethernet MAC controllers
86 * @iobase: The base address of the hardware registers
87 * @enetaddr: The Ethernet MAC address that is loaded from EEPROM or env
88 * @phy_interface: PHY interface to use - see PHY_INTERFACE_MODE_...
92 unsigned char enetaddr[6];
97 * struct eth_ops - functions of Ethernet MAC controllers
99 * start: Prepare the hardware to send and receive packets
100 * send: Send the bytes passed in "packet" as a packet on the wire
101 * recv: Check if the hardware received a packet. If so, set the pointer to the
102 * packet buffer in the packetp parameter. If not, return an error or 0 to
103 * indicate that the hardware receive FIFO is empty. If 0 is returned, the
104 * network stack will not process the empty packet, but free_pkt() will be
106 * free_pkt: Give the driver an opportunity to manage its packet buffer memory
107 * when the network stack is finished processing it. This will only be
108 * called when no error was returned from recv - optional
109 * stop: Stop the hardware from looking for packets - may be called even if
111 * mcast: Join or leave a multicast group (for TFTP) - optional
112 * write_hwaddr: Write a MAC address to the hardware (used to pass it to Linux
113 * on some platforms like ARM). This function expects the
114 * eth_pdata::enetaddr field to be populated - optional
115 * read_rom_hwaddr: Some devices have a backup of the MAC address stored in a
116 * ROM on the board. This is how the driver should expose it
117 * to the network stack. This function should fill in the
118 * eth_pdata::enetaddr field - optional
121 int (*start)(struct udevice *dev);
122 int (*send)(struct udevice *dev, void *packet, int length);
123 int (*recv)(struct udevice *dev, uchar **packetp);
124 int (*free_pkt)(struct udevice *dev, uchar *packet, int length);
125 void (*stop)(struct udevice *dev);
126 #ifdef CONFIG_MCAST_TFTP
127 int (*mcast)(struct udevice *dev, const u8 *enetaddr, int join);
129 int (*write_hwaddr)(struct udevice *dev);
130 int (*read_rom_hwaddr)(struct udevice *dev);
133 #define eth_get_ops(dev) ((struct eth_ops *)(dev)->driver->ops)
135 struct udevice *eth_get_dev(void); /* get the current device */
137 * The devname can be either an exact name given by the driver or device tree
138 * or it can be an alias of the form "eth%d"
140 struct udevice *eth_get_dev_by_name(const char *devname);
141 unsigned char *eth_get_ethaddr(void); /* get the current device MAC */
142 /* Used only when NetConsole is enabled */
143 int eth_init_state_only(void); /* Set active state */
144 void eth_halt_state_only(void); /* Set passive state */
147 #ifndef CONFIG_DM_ETH
150 unsigned char enetaddr[6];
154 int (*init)(struct eth_device *, bd_t *);
155 int (*send)(struct eth_device *, void *packet, int length);
156 int (*recv)(struct eth_device *);
157 void (*halt)(struct eth_device *);
158 #ifdef CONFIG_MCAST_TFTP
159 int (*mcast)(struct eth_device *, const u8 *enetaddr, u8 set);
161 int (*write_hwaddr)(struct eth_device *);
162 struct eth_device *next;
167 int eth_register(struct eth_device *dev);/* Register network device */
168 int eth_unregister(struct eth_device *dev);/* Remove network device */
170 extern struct eth_device *eth_current;
172 static inline __attribute__((always_inline))
173 struct eth_device *eth_get_dev(void)
177 struct eth_device *eth_get_dev_by_name(const char *devname);
178 struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */
180 /* get the current device MAC */
181 static inline unsigned char *eth_get_ethaddr(void)
184 return eth_current->enetaddr;
188 /* Set active state */
189 static inline __attribute__((always_inline)) int eth_init_state_only(void)
191 eth_get_dev()->state = ETH_STATE_ACTIVE;
195 /* Set passive state */
196 static inline __attribute__((always_inline)) void eth_halt_state_only(void)
198 eth_get_dev()->state = ETH_STATE_PASSIVE;
202 * Set the hardware address for an ethernet interface based on 'eth%daddr'
203 * environment variable (or just 'ethaddr' if eth_number is 0).
205 * base_name - base name for device (normally "eth")
206 * eth_number - value of %d (0 for first device of this type)
208 * 0 is success, non-zero is error status from driver.
210 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
213 int usb_eth_initialize(bd_t *bi);
216 int eth_initialize(void); /* Initialize network subsystem */
217 void eth_try_another(int first_restart); /* Change the device */
218 void eth_set_current(void); /* set nterface to ethcur var */
220 int eth_get_dev_index(void); /* get the device index */
221 void eth_parse_enetaddr(const char *addr, uchar *enetaddr);
222 int eth_getenv_enetaddr(char *name, uchar *enetaddr);
223 int eth_setenv_enetaddr(char *name, const uchar *enetaddr);
226 * Get the hardware address for an ethernet interface .
228 * base_name - base name for device (normally "eth")
229 * index - device index number (0 for first)
230 * enetaddr - returns 6 byte hardware address
232 * Return true if the address is valid.
234 int eth_getenv_enetaddr_by_index(const char *base_name, int index,
237 int eth_init(void); /* Initialize the device */
238 int eth_send(void *packet, int length); /* Send a packet */
241 int eth_receive(void *packet, int length); /* Receive a packet*/
242 extern void (*push_packet)(void *packet, int length);
244 int eth_rx(void); /* Check for received packets */
245 void eth_halt(void); /* stop SCC */
246 const char *eth_get_name(void); /* get name of current device */
248 #ifdef CONFIG_MCAST_TFTP
249 int eth_mcast_join(struct in_addr mcast_addr, int join);
250 u32 ether_crc(size_t len, unsigned char const *p);
254 /**********************************************************************/
263 struct ethernet_hdr {
264 u8 et_dest[6]; /* Destination node */
265 u8 et_src[6]; /* Source node */
266 u16 et_protlen; /* Protocol or length */
269 /* Ethernet header size */
270 #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr))
272 #define ETH_FCS_LEN 4 /* Octets in the FCS */
275 u8 et_dest[6]; /* Destination node */
276 u8 et_src[6]; /* Source node */
277 u16 et_protlen; /* Protocol or length */
278 u8 et_dsap; /* 802 DSAP */
279 u8 et_ssap; /* 802 SSAP */
280 u8 et_ctl; /* 802 control */
281 u8 et_snap1; /* SNAP */
284 u16 et_prot; /* 802 protocol */
287 /* 802 + SNAP + ethernet header size */
288 #define E802_HDR_SIZE (sizeof(struct e802_hdr))
291 * Virtual LAN Ethernet header
293 struct vlan_ethernet_hdr {
294 u8 vet_dest[6]; /* Destination node */
295 u8 vet_src[6]; /* Source node */
296 u16 vet_vlan_type; /* PROT_VLAN */
297 u16 vet_tag; /* TAG of VLAN */
298 u16 vet_type; /* protocol type */
301 /* VLAN Ethernet header size */
302 #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr))
304 #define PROT_IP 0x0800 /* IP protocol */
305 #define PROT_ARP 0x0806 /* IP ARP protocol */
306 #define PROT_RARP 0x8035 /* IP ARP protocol */
307 #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */
309 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
310 #define IPPROTO_UDP 17 /* User Datagram Protocol */
313 * Internet Protocol (IP) header.
316 u8 ip_hl_v; /* header length and version */
317 u8 ip_tos; /* type of service */
318 u16 ip_len; /* total length */
319 u16 ip_id; /* identification */
320 u16 ip_off; /* fragment offset field */
321 u8 ip_ttl; /* time to live */
322 u8 ip_p; /* protocol */
323 u16 ip_sum; /* checksum */
324 struct in_addr ip_src; /* Source IP address */
325 struct in_addr ip_dst; /* Destination IP address */
328 #define IP_OFFS 0x1fff /* ip offset *= 8 */
329 #define IP_FLAGS 0xe000 /* first 3 bits */
330 #define IP_FLAGS_RES 0x8000 /* reserved */
331 #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */
332 #define IP_FLAGS_MFRAG 0x2000 /* more fragments */
334 #define IP_HDR_SIZE (sizeof(struct ip_hdr))
337 * Internet Protocol (IP) + UDP header.
340 u8 ip_hl_v; /* header length and version */
341 u8 ip_tos; /* type of service */
342 u16 ip_len; /* total length */
343 u16 ip_id; /* identification */
344 u16 ip_off; /* fragment offset field */
345 u8 ip_ttl; /* time to live */
346 u8 ip_p; /* protocol */
347 u16 ip_sum; /* checksum */
348 struct in_addr ip_src; /* Source IP address */
349 struct in_addr ip_dst; /* Destination IP address */
350 u16 udp_src; /* UDP source port */
351 u16 udp_dst; /* UDP destination port */
352 u16 udp_len; /* Length of UDP packet */
353 u16 udp_xsum; /* Checksum */
356 #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr))
357 #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE)
360 * Address Resolution Protocol (ARP) header.
363 u16 ar_hrd; /* Format of hardware address */
364 # define ARP_ETHER 1 /* Ethernet hardware address */
365 u16 ar_pro; /* Format of protocol address */
366 u8 ar_hln; /* Length of hardware address */
368 u8 ar_pln; /* Length of protocol address */
370 u16 ar_op; /* Operation */
371 # define ARPOP_REQUEST 1 /* Request to resolve address */
372 # define ARPOP_REPLY 2 /* Response to previous request */
374 # define RARPOP_REQUEST 3 /* Request to resolve address */
375 # define RARPOP_REPLY 4 /* Response to previous request */
378 * The remaining fields are variable in size, according to
379 * the sizes above, and are defined as appropriate for
380 * specific hardware/protocol combinations.
383 #define ar_sha ar_data[0]
384 #define ar_spa ar_data[ARP_HLEN]
385 #define ar_tha ar_data[ARP_HLEN + ARP_PLEN]
386 #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN]
388 u8 ar_sha[]; /* Sender hardware address */
389 u8 ar_spa[]; /* Sender protocol address */
390 u8 ar_tha[]; /* Target hardware address */
391 u8 ar_tpa[]; /* Target protocol address */
395 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
398 * ICMP stuff (just enough to handle (host) redirect messages)
400 #define ICMP_ECHO_REPLY 0 /* Echo reply */
401 #define ICMP_NOT_REACH 3 /* Detination unreachable */
402 #define ICMP_REDIRECT 5 /* Redirect (change route) */
403 #define ICMP_ECHO_REQUEST 8 /* Echo request */
405 /* Codes for REDIRECT. */
406 #define ICMP_REDIR_NET 0 /* Redirect Net */
407 #define ICMP_REDIR_HOST 1 /* Redirect Host */
409 /* Codes for NOT_REACH */
410 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */
430 #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr))
431 #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE)
434 * Maximum packet size; used to allocate packet storage.
435 * TFTP packets can be 524 bytes + IP header + ethernet header.
436 * Lets be conservative, and go for 38 * 16. (Must also be
437 * a multiple of 32 bytes).
440 * AS.HARNOIS : Better to set PKTSIZE to maximum size because
441 * traffic type is not always controlled
442 * maximum packet size = 1518
443 * maximum packet size and multiple of 32 bytes = 1536
446 #define PKTSIZE_ALIGN 1536
447 /*#define PKTSIZE 608*/
450 * Maximum receive ring size; that is, the number of packets
451 * we can buffer before overflow happens. Basically, this just
452 * needs to be enough to prevent a packet being discarded while
453 * we are processing the previous one.
456 #define RINGSZ_LOG2 2
458 /**********************************************************************/
464 * All variables of type struct in_addr are stored in NETWORK byte order
469 /** BOOTP EXTENTIONS **/
470 extern struct in_addr net_gateway; /* Our gateway IP address */
471 extern struct in_addr net_netmask; /* Our subnet mask (0 = unknown) */
472 /* Our Domain Name Server (0 = unknown) */
473 extern struct in_addr net_dns_server;
474 #if defined(CONFIG_BOOTP_DNS2)
475 /* Our 2nd Domain Name Server (0 = unknown) */
476 extern struct in_addr net_dns_server2;
478 extern char net_nis_domain[32]; /* Our IS domain */
479 extern char net_hostname[32]; /* Our hostname */
480 extern char net_root_path[64]; /* Our root path */
481 /** END OF BOOTP EXTENTIONS **/
482 extern u8 net_ethaddr[6]; /* Our ethernet address */
483 extern u8 net_server_ethaddr[6]; /* Boot server enet address */
484 extern struct in_addr net_ip; /* Our IP addr (0 = unknown) */
485 extern struct in_addr net_server_ip; /* Server IP addr (0 = unknown) */
486 extern uchar *net_tx_packet; /* THE transmit packet */
487 extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */
488 extern uchar *net_rx_packet; /* Current receive packet */
489 extern int net_rx_packet_len; /* Current rx packet length */
490 extern const u8 net_bcast_ethaddr[6]; /* Ethernet broadcast address */
491 extern const u8 net_null_ethaddr[6];
493 #define VLAN_NONE 4095 /* untagged */
494 #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */
495 extern ushort net_our_vlan; /* Our VLAN */
496 extern ushort net_native_vlan; /* Our Native VLAN */
498 extern int net_restart_wrap; /* Tried all network devices */
501 BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
502 TFTPSRV, TFTPPUT, LINKLOCAL
505 extern char net_boot_file_name[128];/* Boot File name */
506 /* The actual transferred size of the bootfile (in bytes) */
507 extern u32 net_boot_file_size;
508 /* Boot file size in blocks as reported by the DHCP server */
509 extern u32 net_boot_file_expected_size_in_blocks;
511 #if defined(CONFIG_CMD_DNS)
512 extern char *net_dns_resolve; /* The host to resolve */
513 extern char *net_dns_env_var; /* the env var to put the ip into */
516 #if defined(CONFIG_CMD_PING)
517 extern struct in_addr net_ping_ip; /* the ip address to ping */
520 #if defined(CONFIG_CMD_CDP)
521 /* when CDP completes these hold the return values */
522 extern ushort cdp_native_vlan; /* CDP returned native VLAN */
523 extern ushort cdp_appliance_vlan; /* CDP returned appliance VLAN */
526 * Check for a CDP packet by examining the received MAC address field
528 static inline int is_cdp_packet(const uchar *ethaddr)
530 extern const u8 net_cdp_ethaddr[6];
532 return memcmp(ethaddr, net_cdp_ethaddr, 6) == 0;
536 #if defined(CONFIG_CMD_SNTP)
537 extern struct in_addr net_ntp_server; /* the ip address to NTP */
538 extern int net_ntp_time_offset; /* offset time from UTC */
541 #if defined(CONFIG_MCAST_TFTP)
542 extern struct in_addr net_mcast_addr;
545 /* Initialize the network adapter */
547 int net_loop(enum proto_t);
549 /* Load failed. Start again. */
550 int net_start_again(void);
552 /* Get size of the ethernet header when we send */
553 int net_eth_hdr_size(void);
555 /* Set ethernet header; returns the size of the header */
556 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot);
557 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot);
560 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source);
561 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport,
565 * compute_ip_checksum() - Compute IP checksum
567 * @addr: Address to check (must be 16-bit aligned)
568 * @nbytes: Number of bytes to check (normally a multiple of 2)
569 * @return 16-bit IP checksum
571 unsigned compute_ip_checksum(const void *addr, unsigned nbytes);
574 * add_ip_checksums() - add two IP checksums
576 * @offset: Offset of first sum (if odd we do a byte-swap)
577 * @sum: First checksum
578 * @new_sum: New checksum to add
579 * @return updated 16-bit IP checksum
581 unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum);
584 * ip_checksum_ok() - check if a checksum is correct
586 * This works by making sure the checksum sums to 0
588 * @addr: Address to check (must be 16-bit aligned)
589 * @nbytes: Number of bytes to check (normally a multiple of 2)
590 * @return true if the checksum matches, false if not
592 int ip_checksum_ok(const void *addr, unsigned nbytes);
595 rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */
596 void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */
597 rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */
598 void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */
599 void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
600 void net_set_timeout_handler(ulong, thand_f *);/* Set timeout handler */
602 /* Network loop state */
603 enum net_loop_state {
609 extern enum net_loop_state net_state;
611 static inline void net_set_state(enum net_loop_state state)
613 debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state);
617 /* Transmit a packet */
618 static inline void net_send_packet(uchar *pkt, int len)
620 /* Currently no way to return errors from eth_send() */
621 (void) eth_send(pkt, len);
625 * Transmit "net_tx_packet" as UDP packet, performing ARP request if needed
626 * (ether will be populated)
628 * @param ether Raw packet buffer
629 * @param dest IP address to send the datagram to
630 * @param dport Destination UDP port
631 * @param sport Source UDP port
632 * @param payload_len Length of data after the UDP header
634 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport,
635 int sport, int payload_len);
637 /* Processes a received packet */
638 void net_process_received_packet(uchar *in_packet, int len);
640 #ifdef CONFIG_NETCONSOLE
642 int nc_input_packet(uchar *pkt, struct in_addr src_ip, unsigned dest_port,
643 unsigned src_port, unsigned len);
646 static inline __attribute__((always_inline)) int eth_is_on_demand_init(void)
648 #ifdef CONFIG_NETCONSOLE
649 extern enum proto_t net_loop_last_protocol;
651 return net_loop_last_protocol != NETCONS;
657 static inline void eth_set_last_protocol(int protocol)
659 #ifdef CONFIG_NETCONSOLE
660 extern enum proto_t net_loop_last_protocol;
662 net_loop_last_protocol = protocol;
667 * Check if autoload is enabled. If so, use either NFS or TFTP to download
670 void net_auto_load(void);
673 * The following functions are a bit ugly, but necessary to deal with
674 * alignment restrictions on ARM.
676 * We're using inline functions, which had the smallest memory
677 * footprint in our tests.
679 /* return IP *in network byteorder* */
680 static inline struct in_addr net_read_ip(void *from)
684 memcpy((void *)&ip, (void *)from, sizeof(ip));
688 /* return ulong *in network byteorder* */
689 static inline u32 net_read_u32(u32 *from)
693 memcpy((void *)&l, (void *)from, sizeof(l));
697 /* write IP *in network byteorder* */
698 static inline void net_write_ip(void *to, struct in_addr ip)
700 memcpy(to, (void *)&ip, sizeof(ip));
704 static inline void net_copy_ip(void *to, void *from)
706 memcpy((void *)to, from, sizeof(struct in_addr));
710 static inline void net_copy_u32(u32 *to, u32 *from)
712 memcpy((void *)to, (void *)from, sizeof(u32));
716 * is_zero_ethaddr - Determine if give Ethernet address is all zeros.
717 * @addr: Pointer to a six-byte array containing the Ethernet address
719 * Return true if the address is all zeroes.
721 static inline int is_zero_ethaddr(const u8 *addr)
723 return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
727 * is_multicast_ethaddr - Determine if the Ethernet address is a multicast.
728 * @addr: Pointer to a six-byte array containing the Ethernet address
730 * Return true if the address is a multicast address.
731 * By definition the broadcast address is also a multicast address.
733 static inline int is_multicast_ethaddr(const u8 *addr)
735 return 0x01 & addr[0];
739 * is_broadcast_ethaddr - Determine if the Ethernet address is broadcast
740 * @addr: Pointer to a six-byte array containing the Ethernet address
742 * Return true if the address is the broadcast address.
744 static inline int is_broadcast_ethaddr(const u8 *addr)
746 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) ==
751 * is_valid_ethaddr - Determine if the given Ethernet address is valid
752 * @addr: Pointer to a six-byte array containing the Ethernet address
754 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
755 * a multicast address, and is not FF:FF:FF:FF:FF:FF.
757 * Return true if the address is valid.
759 static inline int is_valid_ethaddr(const u8 *addr)
761 /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
762 * explicitly check for it here. */
763 return !is_multicast_ethaddr(addr) && !is_zero_ethaddr(addr);
767 * net_random_ethaddr - Generate software assigned random Ethernet address
768 * @addr: Pointer to a six-byte array containing the Ethernet address
770 * Generate a random Ethernet address (MAC) that is not multicast
771 * and has the local assigned bit set.
773 static inline void net_random_ethaddr(uchar *addr)
776 unsigned int seed = get_timer(0);
778 for (i = 0; i < 6; i++)
779 addr[i] = rand_r(&seed);
781 addr[0] &= 0xfe; /* clear multicast bit */
782 addr[0] |= 0x02; /* set local assignment bit (IEEE802) */
785 /* Convert an IP address to a string */
786 void ip_to_string(struct in_addr x, char *s);
788 /* Convert a string to ip address */
789 struct in_addr string_to_ip(const char *s);
791 /* Convert a VLAN id to a string */
792 void vlan_to_string(ushort x, char *s);
794 /* Convert a string to a vlan id */
795 ushort string_to_vlan(const char *s);
797 /* read a VLAN id from an environment variable */
798 ushort getenv_vlan(char *);
800 /* copy a filename (allow for "..." notation, limit length) */
801 void copy_filename(char *dst, const char *src, int size);
803 /* get a random source port */
804 unsigned int random_port(void);
806 /* Update U-Boot over TFTP */
807 int update_tftp(ulong addr);
809 /**********************************************************************/
811 #endif /* __NET_H__ */