1 /* SPDX-License-Identifier: GPL-2.0 */
3 * LiMon Monitor (LiMon) - Network.
5 * Copyright 1994 - 2000 Neil Russell.
9 * 9/16/00 bor adapted to TQM823L/STK8xxL board, RARP/TFTP boot added
15 #include <asm/cache.h>
16 #include <asm/byteorder.h> /* for nton* / ntoh* stuff */
18 #include <linux/if_ether.h>
21 #define DEBUG_LL_STATE 0 /* Link local state machine changes */
22 #define DEBUG_DEV_PKT 0 /* Packets or info directed to the device */
23 #define DEBUG_NET_PKT 0 /* Packets on info on the network at large */
24 #define DEBUG_INT_STATE 0 /* Internal network state changes */
27 * The number of receive packet buffers, and the required packet buffer
28 * alignment in memory.
32 #ifdef CONFIG_SYS_RX_ETH_BUFFER
33 # define PKTBUFSRX CONFIG_SYS_RX_ETH_BUFFER
38 #define PKTALIGN ARCH_DMA_MINALIGN
40 /* ARP hardware address length */
43 * The size of a MAC address in string form, each digit requires two chars
44 * and five separator characters to form '00:00:00:00:00:00'.
46 #define ARP_HLEN_ASCII (ARP_HLEN * 2) + (ARP_HLEN - 1)
48 /* IPv4 addresses are always 32 bits in size */
54 * do_tftpb - Run the tftpboot command
56 * @cmdtp: Command information for tftpboot
57 * @flag: Command flags (CMD_FLAG_...)
58 * @argc: Number of arguments
59 * @argv: List of arguments
60 * @return result (see enum command_ret_t)
62 int do_tftpb(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]);
65 * An incoming packet handler.
66 * @param pkt pointer to the application packet
67 * @param dport destination UDP port
68 * @param sip source IP address
69 * @param sport source UDP port
70 * @param len packet length
72 typedef void rxhand_f(uchar *pkt, unsigned dport,
73 struct in_addr sip, unsigned sport,
77 * An incoming ICMP packet handler.
78 * @param type ICMP type
79 * @param code ICMP code
80 * @param dport destination UDP port
81 * @param sip source IP address
82 * @param sport source UDP port
83 * @param pkt pointer to the ICMP packet data
84 * @param len packet length
86 typedef void rxhand_icmp_f(unsigned type, unsigned code, unsigned dport,
87 struct in_addr sip, unsigned sport, uchar *pkt, unsigned len);
90 * A timeout handler. Called after time interval has expired.
92 typedef void thand_f(void);
102 * struct eth_pdata - Platform data for Ethernet MAC controllers
104 * @iobase: The base address of the hardware registers
105 * @enetaddr: The Ethernet MAC address that is loaded from EEPROM or env
106 * @phy_interface: PHY interface to use - see PHY_INTERFACE_MODE_...
107 * @max_speed: Maximum speed of Ethernet connection supported by MAC
108 * @priv_pdata: device specific platdata
112 unsigned char enetaddr[ARP_HLEN];
118 enum eth_recv_flags {
120 * Check hardware device for new packets (otherwise only return those
121 * which are already in the memory buffer ready to process)
123 ETH_RECV_CHECK_DEVICE = 1 << 0,
127 * struct eth_ops - functions of Ethernet MAC controllers
129 * start: Prepare the hardware to send and receive packets
130 * send: Send the bytes passed in "packet" as a packet on the wire
131 * recv: Check if the hardware received a packet. If so, set the pointer to the
132 * packet buffer in the packetp parameter. If not, return an error or 0 to
133 * indicate that the hardware receive FIFO is empty. If 0 is returned, the
134 * network stack will not process the empty packet, but free_pkt() will be
136 * free_pkt: Give the driver an opportunity to manage its packet buffer memory
137 * when the network stack is finished processing it. This will only be
138 * called when no error was returned from recv - optional
139 * stop: Stop the hardware from looking for packets - may be called even if
141 * mcast: Join or leave a multicast group (for TFTP) - optional
142 * write_hwaddr: Write a MAC address to the hardware (used to pass it to Linux
143 * on some platforms like ARM). This function expects the
144 * eth_pdata::enetaddr field to be populated. The method can
145 * return -ENOSYS to indicate that this is not implemented for
146 this hardware - optional.
147 * read_rom_hwaddr: Some devices have a backup of the MAC address stored in a
148 * ROM on the board. This is how the driver should expose it
149 * to the network stack. This function should fill in the
150 * eth_pdata::enetaddr field - optional
153 int (*start)(struct udevice *dev);
154 int (*send)(struct udevice *dev, void *packet, int length);
155 int (*recv)(struct udevice *dev, int flags, uchar **packetp);
156 int (*free_pkt)(struct udevice *dev, uchar *packet, int length);
157 void (*stop)(struct udevice *dev);
158 int (*mcast)(struct udevice *dev, const u8 *enetaddr, int join);
159 int (*write_hwaddr)(struct udevice *dev);
160 int (*read_rom_hwaddr)(struct udevice *dev);
163 #define eth_get_ops(dev) ((struct eth_ops *)(dev)->driver->ops)
165 struct udevice *eth_get_dev(void); /* get the current device */
167 * The devname can be either an exact name given by the driver or device tree
168 * or it can be an alias of the form "eth%d"
170 struct udevice *eth_get_dev_by_name(const char *devname);
171 unsigned char *eth_get_ethaddr(void); /* get the current device MAC */
173 /* Used only when NetConsole is enabled */
174 int eth_is_active(struct udevice *dev); /* Test device for active state */
175 int eth_init_state_only(void); /* Set active state */
176 void eth_halt_state_only(void); /* Set passive state */
179 #ifndef CONFIG_DM_ETH
181 #define ETH_NAME_LEN 20
182 char name[ETH_NAME_LEN];
183 unsigned char enetaddr[ARP_HLEN];
187 int (*init)(struct eth_device *, bd_t *);
188 int (*send)(struct eth_device *, void *packet, int length);
189 int (*recv)(struct eth_device *);
190 void (*halt)(struct eth_device *);
191 int (*mcast)(struct eth_device *, const u8 *enetaddr, int join);
192 int (*write_hwaddr)(struct eth_device *);
193 struct eth_device *next;
198 int eth_register(struct eth_device *dev);/* Register network device */
199 int eth_unregister(struct eth_device *dev);/* Remove network device */
201 extern struct eth_device *eth_current;
203 static __always_inline struct eth_device *eth_get_dev(void)
207 struct eth_device *eth_get_dev_by_name(const char *devname);
208 struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */
210 /* get the current device MAC */
211 static inline unsigned char *eth_get_ethaddr(void)
214 return eth_current->enetaddr;
218 /* Used only when NetConsole is enabled */
219 int eth_is_active(struct eth_device *dev); /* Test device for active state */
220 /* Set active state */
221 static __always_inline int eth_init_state_only(void)
223 eth_get_dev()->state = ETH_STATE_ACTIVE;
227 /* Set passive state */
228 static __always_inline void eth_halt_state_only(void)
230 eth_get_dev()->state = ETH_STATE_PASSIVE;
234 * Set the hardware address for an ethernet interface based on 'eth%daddr'
235 * environment variable (or just 'ethaddr' if eth_number is 0).
237 * base_name - base name for device (normally "eth")
238 * eth_number - value of %d (0 for first device of this type)
240 * 0 is success, non-zero is error status from driver.
242 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
245 int usb_eth_initialize(bd_t *bi);
248 int eth_initialize(void); /* Initialize network subsystem */
249 void eth_try_another(int first_restart); /* Change the device */
250 void eth_set_current(void); /* set nterface to ethcur var */
252 int eth_get_dev_index(void); /* get the device index */
255 * eth_env_set_enetaddr_by_index() - set the MAC address environment variable
257 * This sets up an environment variable with the given MAC address (@enetaddr).
258 * The environment variable to be set is defined by <@base_name><@index>addr.
259 * If @index is 0 it is omitted. For common Ethernet this means ethaddr,
262 * @base_name: Base name for variable, typically "eth"
263 * @index: Index of interface being updated (>=0)
264 * @enetaddr: Pointer to MAC address to put into the variable
265 * @return 0 if OK, other value on error
267 int eth_env_set_enetaddr_by_index(const char *base_name, int index,
272 * Initialize USB ethernet device with CONFIG_DM_ETH
274 * 0 is success, non-zero is error status.
276 int usb_ether_init(void);
279 * Get the hardware address for an ethernet interface .
281 * base_name - base name for device (normally "eth")
282 * index - device index number (0 for first)
283 * enetaddr - returns 6 byte hardware address
285 * Return true if the address is valid.
287 int eth_env_get_enetaddr_by_index(const char *base_name, int index,
290 int eth_init(void); /* Initialize the device */
291 int eth_send(void *packet, int length); /* Send a packet */
293 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
294 int eth_receive(void *packet, int length); /* Receive a packet*/
295 extern void (*push_packet)(void *packet, int length);
297 int eth_rx(void); /* Check for received packets */
298 void eth_halt(void); /* stop SCC */
299 const char *eth_get_name(void); /* get name of current device */
300 int eth_mcast_join(struct in_addr mcast_addr, int join);
302 /**********************************************************************/
311 struct ethernet_hdr {
312 u8 et_dest[ARP_HLEN]; /* Destination node */
313 u8 et_src[ARP_HLEN]; /* Source node */
314 u16 et_protlen; /* Protocol or length */
315 } __attribute__((packed));
317 /* Ethernet header size */
318 #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr))
320 #define ETH_FCS_LEN 4 /* Octets in the FCS */
323 u8 et_dest[ARP_HLEN]; /* Destination node */
324 u8 et_src[ARP_HLEN]; /* Source node */
325 u16 et_protlen; /* Protocol or length */
326 u8 et_dsap; /* 802 DSAP */
327 u8 et_ssap; /* 802 SSAP */
328 u8 et_ctl; /* 802 control */
329 u8 et_snap1; /* SNAP */
332 u16 et_prot; /* 802 protocol */
333 } __attribute__((packed));
335 /* 802 + SNAP + ethernet header size */
336 #define E802_HDR_SIZE (sizeof(struct e802_hdr))
339 * Virtual LAN Ethernet header
341 struct vlan_ethernet_hdr {
342 u8 vet_dest[ARP_HLEN]; /* Destination node */
343 u8 vet_src[ARP_HLEN]; /* Source node */
344 u16 vet_vlan_type; /* PROT_VLAN */
345 u16 vet_tag; /* TAG of VLAN */
346 u16 vet_type; /* protocol type */
347 } __attribute__((packed));
349 /* VLAN Ethernet header size */
350 #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr))
352 #define PROT_IP 0x0800 /* IP protocol */
353 #define PROT_ARP 0x0806 /* IP ARP protocol */
354 #define PROT_WOL 0x0842 /* ether-wake WoL protocol */
355 #define PROT_RARP 0x8035 /* IP ARP protocol */
356 #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */
357 #define PROT_IPV6 0x86dd /* IPv6 over bluebook */
358 #define PROT_PPP_SES 0x8864 /* PPPoE session messages */
360 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
361 #define IPPROTO_UDP 17 /* User Datagram Protocol */
364 * Internet Protocol (IP) header.
367 u8 ip_hl_v; /* header length and version */
368 u8 ip_tos; /* type of service */
369 u16 ip_len; /* total length */
370 u16 ip_id; /* identification */
371 u16 ip_off; /* fragment offset field */
372 u8 ip_ttl; /* time to live */
373 u8 ip_p; /* protocol */
374 u16 ip_sum; /* checksum */
375 struct in_addr ip_src; /* Source IP address */
376 struct in_addr ip_dst; /* Destination IP address */
377 } __attribute__((packed));
379 #define IP_OFFS 0x1fff /* ip offset *= 8 */
380 #define IP_FLAGS 0xe000 /* first 3 bits */
381 #define IP_FLAGS_RES 0x8000 /* reserved */
382 #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */
383 #define IP_FLAGS_MFRAG 0x2000 /* more fragments */
385 #define IP_HDR_SIZE (sizeof(struct ip_hdr))
388 * Internet Protocol (IP) + UDP header.
391 u8 ip_hl_v; /* header length and version */
392 u8 ip_tos; /* type of service */
393 u16 ip_len; /* total length */
394 u16 ip_id; /* identification */
395 u16 ip_off; /* fragment offset field */
396 u8 ip_ttl; /* time to live */
397 u8 ip_p; /* protocol */
398 u16 ip_sum; /* checksum */
399 struct in_addr ip_src; /* Source IP address */
400 struct in_addr ip_dst; /* Destination IP address */
401 u16 udp_src; /* UDP source port */
402 u16 udp_dst; /* UDP destination port */
403 u16 udp_len; /* Length of UDP packet */
404 u16 udp_xsum; /* Checksum */
405 } __attribute__((packed));
407 #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr))
408 #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE)
411 * Address Resolution Protocol (ARP) header.
414 u16 ar_hrd; /* Format of hardware address */
415 # define ARP_ETHER 1 /* Ethernet hardware address */
416 u16 ar_pro; /* Format of protocol address */
417 u8 ar_hln; /* Length of hardware address */
418 u8 ar_pln; /* Length of protocol address */
420 u16 ar_op; /* Operation */
421 # define ARPOP_REQUEST 1 /* Request to resolve address */
422 # define ARPOP_REPLY 2 /* Response to previous request */
424 # define RARPOP_REQUEST 3 /* Request to resolve address */
425 # define RARPOP_REPLY 4 /* Response to previous request */
428 * The remaining fields are variable in size, according to
429 * the sizes above, and are defined as appropriate for
430 * specific hardware/protocol combinations.
433 #define ar_sha ar_data[0]
434 #define ar_spa ar_data[ARP_HLEN]
435 #define ar_tha ar_data[ARP_HLEN + ARP_PLEN]
436 #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN]
438 u8 ar_sha[]; /* Sender hardware address */
439 u8 ar_spa[]; /* Sender protocol address */
440 u8 ar_tha[]; /* Target hardware address */
441 u8 ar_tpa[]; /* Target protocol address */
443 } __attribute__((packed));
445 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
448 * ICMP stuff (just enough to handle (host) redirect messages)
450 #define ICMP_ECHO_REPLY 0 /* Echo reply */
451 #define ICMP_NOT_REACH 3 /* Detination unreachable */
452 #define ICMP_REDIRECT 5 /* Redirect (change route) */
453 #define ICMP_ECHO_REQUEST 8 /* Echo request */
455 /* Codes for REDIRECT. */
456 #define ICMP_REDIR_NET 0 /* Redirect Net */
457 #define ICMP_REDIR_HOST 1 /* Redirect Host */
459 /* Codes for NOT_REACH */
460 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */
478 } __attribute__((packed));
480 #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr))
481 #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE)
484 * Maximum packet size; used to allocate packet storage. Use
485 * the maxium Ethernet frame size as specified by the Ethernet
486 * standard including the 802.1Q tag (VLAN tagging).
487 * maximum packet size = 1522
488 * maximum packet size and multiple of 32 bytes = 1536
491 #define PKTSIZE_ALIGN 1536
494 * Maximum receive ring size; that is, the number of packets
495 * we can buffer before overflow happens. Basically, this just
496 * needs to be enough to prevent a packet being discarded while
497 * we are processing the previous one.
500 #define RINGSZ_LOG2 2
502 /**********************************************************************/
508 * All variables of type struct in_addr are stored in NETWORK byte order
513 /** BOOTP EXTENTIONS **/
514 extern struct in_addr net_gateway; /* Our gateway IP address */
515 extern struct in_addr net_netmask; /* Our subnet mask (0 = unknown) */
516 /* Our Domain Name Server (0 = unknown) */
517 extern struct in_addr net_dns_server;
518 #if defined(CONFIG_BOOTP_DNS2)
519 /* Our 2nd Domain Name Server (0 = unknown) */
520 extern struct in_addr net_dns_server2;
522 extern char net_nis_domain[32]; /* Our IS domain */
523 extern char net_hostname[32]; /* Our hostname */
524 extern char net_root_path[64]; /* Our root path */
525 /** END OF BOOTP EXTENTIONS **/
526 extern u8 net_ethaddr[ARP_HLEN]; /* Our ethernet address */
527 extern u8 net_server_ethaddr[ARP_HLEN]; /* Boot server enet address */
528 extern struct in_addr net_ip; /* Our IP addr (0 = unknown) */
529 extern struct in_addr net_server_ip; /* Server IP addr (0 = unknown) */
530 extern uchar *net_tx_packet; /* THE transmit packet */
531 extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */
532 extern uchar *net_rx_packet; /* Current receive packet */
533 extern int net_rx_packet_len; /* Current rx packet length */
534 extern const u8 net_bcast_ethaddr[ARP_HLEN]; /* Ethernet broadcast address */
535 extern const u8 net_null_ethaddr[ARP_HLEN];
537 #define VLAN_NONE 4095 /* untagged */
538 #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */
539 extern ushort net_our_vlan; /* Our VLAN */
540 extern ushort net_native_vlan; /* Our Native VLAN */
542 extern int net_restart_wrap; /* Tried all network devices */
545 BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
546 TFTPSRV, TFTPPUT, LINKLOCAL, FASTBOOT, WOL
549 extern char net_boot_file_name[1024];/* Boot File name */
550 /* Indicates whether the file name was specified on the command line */
551 extern bool net_boot_file_name_explicit;
552 /* The actual transferred size of the bootfile (in bytes) */
553 extern u32 net_boot_file_size;
554 /* Boot file size in blocks as reported by the DHCP server */
555 extern u32 net_boot_file_expected_size_in_blocks;
557 #if defined(CONFIG_CMD_DNS)
558 extern char *net_dns_resolve; /* The host to resolve */
559 extern char *net_dns_env_var; /* the env var to put the ip into */
562 #if defined(CONFIG_CMD_PING)
563 extern struct in_addr net_ping_ip; /* the ip address to ping */
566 #if defined(CONFIG_CMD_CDP)
567 /* when CDP completes these hold the return values */
568 extern ushort cdp_native_vlan; /* CDP returned native VLAN */
569 extern ushort cdp_appliance_vlan; /* CDP returned appliance VLAN */
572 * Check for a CDP packet by examining the received MAC address field
574 static inline int is_cdp_packet(const uchar *ethaddr)
576 extern const u8 net_cdp_ethaddr[ARP_HLEN];
578 return memcmp(ethaddr, net_cdp_ethaddr, ARP_HLEN) == 0;
582 #if defined(CONFIG_CMD_SNTP)
583 extern struct in_addr net_ntp_server; /* the ip address to NTP */
584 extern int net_ntp_time_offset; /* offset time from UTC */
587 /* Initialize the network adapter */
589 int net_loop(enum proto_t);
591 /* Load failed. Start again. */
592 int net_start_again(void);
594 /* Get size of the ethernet header when we send */
595 int net_eth_hdr_size(void);
597 /* Set ethernet header; returns the size of the header */
598 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot);
599 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot);
602 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source,
603 u16 pkt_len, u8 proto);
604 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport,
608 * compute_ip_checksum() - Compute IP checksum
610 * @addr: Address to check (must be 16-bit aligned)
611 * @nbytes: Number of bytes to check (normally a multiple of 2)
612 * @return 16-bit IP checksum
614 unsigned compute_ip_checksum(const void *addr, unsigned nbytes);
617 * add_ip_checksums() - add two IP checksums
619 * @offset: Offset of first sum (if odd we do a byte-swap)
620 * @sum: First checksum
621 * @new_sum: New checksum to add
622 * @return updated 16-bit IP checksum
624 unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum);
627 * ip_checksum_ok() - check if a checksum is correct
629 * This works by making sure the checksum sums to 0
631 * @addr: Address to check (must be 16-bit aligned)
632 * @nbytes: Number of bytes to check (normally a multiple of 2)
633 * @return true if the checksum matches, false if not
635 int ip_checksum_ok(const void *addr, unsigned nbytes);
638 rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */
639 void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */
640 rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */
641 void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */
642 bool arp_is_waiting(void); /* Waiting for ARP reply? */
643 void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
644 void net_set_timeout_handler(ulong, thand_f *);/* Set timeout handler */
646 /* Network loop state */
647 enum net_loop_state {
653 extern enum net_loop_state net_state;
655 static inline void net_set_state(enum net_loop_state state)
657 debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state);
662 * net_get_async_tx_pkt_buf - Get a packet buffer that is not in use for
663 * sending an asynchronous reply
665 * returns - ptr to packet buffer
667 uchar * net_get_async_tx_pkt_buf(void);
669 /* Transmit a packet */
670 static inline void net_send_packet(uchar *pkt, int len)
672 /* Currently no way to return errors from eth_send() */
673 (void) eth_send(pkt, len);
677 * Transmit "net_tx_packet" as UDP packet, performing ARP request if needed
678 * (ether will be populated)
680 * @param ether Raw packet buffer
681 * @param dest IP address to send the datagram to
682 * @param dport Destination UDP port
683 * @param sport Source UDP port
684 * @param payload_len Length of data after the UDP header
686 int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport,
687 int payload_len, int proto, u8 action, u32 tcp_seq_num,
689 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport,
690 int sport, int payload_len);
692 /* Processes a received packet */
693 void net_process_received_packet(uchar *in_packet, int len);
695 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
697 int nc_input_packet(uchar *pkt, struct in_addr src_ip, unsigned dest_port,
698 unsigned src_port, unsigned len);
701 static __always_inline int eth_is_on_demand_init(void)
703 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
704 extern enum proto_t net_loop_last_protocol;
706 return net_loop_last_protocol != NETCONS;
712 static inline void eth_set_last_protocol(int protocol)
714 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
715 extern enum proto_t net_loop_last_protocol;
717 net_loop_last_protocol = protocol;
722 * Check if autoload is enabled. If so, use either NFS or TFTP to download
725 void net_auto_load(void);
728 * The following functions are a bit ugly, but necessary to deal with
729 * alignment restrictions on ARM.
731 * We're using inline functions, which had the smallest memory
732 * footprint in our tests.
734 /* return IP *in network byteorder* */
735 static inline struct in_addr net_read_ip(void *from)
739 memcpy((void *)&ip, (void *)from, sizeof(ip));
743 /* return ulong *in network byteorder* */
744 static inline u32 net_read_u32(void *from)
748 memcpy((void *)&l, (void *)from, sizeof(l));
752 /* write IP *in network byteorder* */
753 static inline void net_write_ip(void *to, struct in_addr ip)
755 memcpy(to, (void *)&ip, sizeof(ip));
759 static inline void net_copy_ip(void *to, void *from)
761 memcpy((void *)to, from, sizeof(struct in_addr));
765 static inline void net_copy_u32(void *to, void *from)
767 memcpy((void *)to, (void *)from, sizeof(u32));
771 * is_zero_ethaddr - Determine if give Ethernet address is all zeros.
772 * @addr: Pointer to a six-byte array containing the Ethernet address
774 * Return true if the address is all zeroes.
776 static inline int is_zero_ethaddr(const u8 *addr)
778 return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
782 * is_multicast_ethaddr - Determine if the Ethernet address is a multicast.
783 * @addr: Pointer to a six-byte array containing the Ethernet address
785 * Return true if the address is a multicast address.
786 * By definition the broadcast address is also a multicast address.
788 static inline int is_multicast_ethaddr(const u8 *addr)
790 return 0x01 & addr[0];
794 * is_broadcast_ethaddr - Determine if the Ethernet address is broadcast
795 * @addr: Pointer to a six-byte array containing the Ethernet address
797 * Return true if the address is the broadcast address.
799 static inline int is_broadcast_ethaddr(const u8 *addr)
801 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) ==
806 * is_valid_ethaddr - Determine if the given Ethernet address is valid
807 * @addr: Pointer to a six-byte array containing the Ethernet address
809 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
810 * a multicast address, and is not FF:FF:FF:FF:FF:FF.
812 * Return true if the address is valid.
814 static inline int is_valid_ethaddr(const u8 *addr)
816 /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
817 * explicitly check for it here. */
818 return !is_multicast_ethaddr(addr) && !is_zero_ethaddr(addr);
822 * net_random_ethaddr - Generate software assigned random Ethernet address
823 * @addr: Pointer to a six-byte array containing the Ethernet address
825 * Generate a random Ethernet address (MAC) that is not multicast
826 * and has the local assigned bit set.
828 static inline void net_random_ethaddr(uchar *addr)
831 unsigned int seed = get_ticks();
833 for (i = 0; i < 6; i++)
834 addr[i] = rand_r(&seed);
836 addr[0] &= 0xfe; /* clear multicast bit */
837 addr[0] |= 0x02; /* set local assignment bit (IEEE802) */
841 * string_to_enetaddr() - Parse a MAC address
843 * Convert a string MAC address
845 * Implemented in lib/net_utils.c (built unconditionally)
847 * @addr: MAC address in aa:bb:cc:dd:ee:ff format, where each part is a 2-digit
849 * @enetaddr: Place to put MAC address (6 bytes)
851 void string_to_enetaddr(const char *addr, uint8_t *enetaddr);
853 /* Convert an IP address to a string */
854 void ip_to_string(struct in_addr x, char *s);
857 * string_to_ip() - Convert a string to ip address
859 * Implemented in lib/net_utils.c (built unconditionally)
861 * @s: Input string to parse
862 * @return: in_addr struct containing the parsed IP address
864 struct in_addr string_to_ip(const char *s);
866 /* Convert a VLAN id to a string */
867 void vlan_to_string(ushort x, char *s);
869 /* Convert a string to a vlan id */
870 ushort string_to_vlan(const char *s);
872 /* read a VLAN id from an environment variable */
873 ushort env_get_vlan(char *);
875 /* copy a filename (allow for "..." notation, limit length) */
876 void copy_filename(char *dst, const char *src, int size);
878 /* check if serverip is specified in filename from the command line */
879 int is_serverip_in_cmd(void);
882 * net_parse_bootfile - Parse the bootfile env var / cmd line param
884 * @param ipaddr - a pointer to the ipaddr to populate if included in bootfile
885 * @param filename - a pointer to the string to save the filename part
886 * @param max_len - The longest - 1 that the filename part can be
888 * return 1 if parsed, 0 if bootfile is empty
890 int net_parse_bootfile(struct in_addr *ipaddr, char *filename, int max_len);
892 /* get a random source port */
893 unsigned int random_port(void);
896 * update_tftp - Update firmware over TFTP (via DFU)
898 * This function updates board's firmware via TFTP
900 * @param addr - memory address where data is stored
901 * @param interface - the DFU medium name - e.g. "mmc"
902 * @param devstring - the DFU medium number - e.g. "1"
904 * @return - 0 on success, other value on failure
906 int update_tftp(ulong addr, char *interface, char *devstring);
909 * env_get_ip() - Convert an environment value to to an ip address
911 * @var: Environment variable to convert. The value of this variable must be
912 * in the format format a.b.c.d, where each value is a decimal number from
914 * @return IP address, or 0 if invalid
916 static inline struct in_addr env_get_ip(char *var)
918 return string_to_ip(env_get(var));
920 #endif /* __NET_H__ */