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 */
20 #include <linux/if_ether.h>
25 #define DEBUG_LL_STATE 0 /* Link local state machine changes */
26 #define DEBUG_DEV_PKT 0 /* Packets or info directed to the device */
27 #define DEBUG_NET_PKT 0 /* Packets on info on the network at large */
28 #define DEBUG_INT_STATE 0 /* Internal network state changes */
31 * The number of receive packet buffers, and the required packet buffer
32 * alignment in memory.
36 #ifdef CONFIG_SYS_RX_ETH_BUFFER
37 # define PKTBUFSRX CONFIG_SYS_RX_ETH_BUFFER
42 #define PKTALIGN ARCH_DMA_MINALIGN
44 /* ARP hardware address length */
47 * The size of a MAC address in string form, each digit requires two chars
48 * and five separator characters to form '00:00:00:00:00:00'.
50 #define ARP_HLEN_ASCII (ARP_HLEN * 2) + (ARP_HLEN - 1)
52 /* IPv4 addresses are always 32 bits in size */
58 * do_tftpb - Run the tftpboot command
60 * @cmdtp: Command information for tftpboot
61 * @flag: Command flags (CMD_FLAG_...)
62 * @argc: Number of arguments
63 * @argv: List of arguments
64 * @return result (see enum command_ret_t)
66 int do_tftpb(struct cmd_tbl_s *cmdtp, int flag, int argc, char *const argv[]);
69 * An incoming packet handler.
70 * @param pkt pointer to the application packet
71 * @param dport destination UDP port
72 * @param sip source IP address
73 * @param sport source UDP port
74 * @param len packet length
76 typedef void rxhand_f(uchar *pkt, unsigned dport,
77 struct in_addr sip, unsigned sport,
81 * An incoming ICMP packet handler.
82 * @param type ICMP type
83 * @param code ICMP code
84 * @param dport destination UDP port
85 * @param sip source IP address
86 * @param sport source UDP port
87 * @param pkt pointer to the ICMP packet data
88 * @param len packet length
90 typedef void rxhand_icmp_f(unsigned type, unsigned code, unsigned dport,
91 struct in_addr sip, unsigned sport, uchar *pkt, unsigned len);
94 * A timeout handler. Called after time interval has expired.
96 typedef void thand_f(void);
106 * struct eth_pdata - Platform data for Ethernet MAC controllers
108 * @iobase: The base address of the hardware registers
109 * @enetaddr: The Ethernet MAC address that is loaded from EEPROM or env
110 * @phy_interface: PHY interface to use - see PHY_INTERFACE_MODE_...
111 * @max_speed: Maximum speed of Ethernet connection supported by MAC
112 * @priv_pdata: device specific platdata
116 unsigned char enetaddr[ARP_HLEN];
122 enum eth_recv_flags {
124 * Check hardware device for new packets (otherwise only return those
125 * which are already in the memory buffer ready to process)
127 ETH_RECV_CHECK_DEVICE = 1 << 0,
131 * struct eth_ops - functions of Ethernet MAC controllers
133 * start: Prepare the hardware to send and receive packets
134 * send: Send the bytes passed in "packet" as a packet on the wire
135 * recv: Check if the hardware received a packet. If so, set the pointer to the
136 * packet buffer in the packetp parameter. If not, return an error or 0 to
137 * indicate that the hardware receive FIFO is empty. If 0 is returned, the
138 * network stack will not process the empty packet, but free_pkt() will be
140 * free_pkt: Give the driver an opportunity to manage its packet buffer memory
141 * when the network stack is finished processing it. This will only be
142 * called when no error was returned from recv - optional
143 * stop: Stop the hardware from looking for packets - may be called even if
145 * mcast: Join or leave a multicast group (for TFTP) - optional
146 * write_hwaddr: Write a MAC address to the hardware (used to pass it to Linux
147 * on some platforms like ARM). This function expects the
148 * eth_pdata::enetaddr field to be populated. The method can
149 * return -ENOSYS to indicate that this is not implemented for
150 this hardware - optional.
151 * read_rom_hwaddr: Some devices have a backup of the MAC address stored in a
152 * ROM on the board. This is how the driver should expose it
153 * to the network stack. This function should fill in the
154 * eth_pdata::enetaddr field - optional
157 int (*start)(struct udevice *dev);
158 int (*send)(struct udevice *dev, void *packet, int length);
159 int (*recv)(struct udevice *dev, int flags, uchar **packetp);
160 int (*free_pkt)(struct udevice *dev, uchar *packet, int length);
161 void (*stop)(struct udevice *dev);
162 int (*mcast)(struct udevice *dev, const u8 *enetaddr, int join);
163 int (*write_hwaddr)(struct udevice *dev);
164 int (*read_rom_hwaddr)(struct udevice *dev);
167 #define eth_get_ops(dev) ((struct eth_ops *)(dev)->driver->ops)
169 struct udevice *eth_get_dev(void); /* get the current device */
171 * The devname can be either an exact name given by the driver or device tree
172 * or it can be an alias of the form "eth%d"
174 struct udevice *eth_get_dev_by_name(const char *devname);
175 unsigned char *eth_get_ethaddr(void); /* get the current device MAC */
177 /* Used only when NetConsole is enabled */
178 int eth_is_active(struct udevice *dev); /* Test device for active state */
179 int eth_init_state_only(void); /* Set active state */
180 void eth_halt_state_only(void); /* Set passive state */
183 #ifndef CONFIG_DM_ETH
185 #define ETH_NAME_LEN 20
186 char name[ETH_NAME_LEN];
187 unsigned char enetaddr[ARP_HLEN];
191 int (*init)(struct eth_device *, bd_t *);
192 int (*send)(struct eth_device *, void *packet, int length);
193 int (*recv)(struct eth_device *);
194 void (*halt)(struct eth_device *);
195 int (*mcast)(struct eth_device *, const u8 *enetaddr, int join);
196 int (*write_hwaddr)(struct eth_device *);
197 struct eth_device *next;
202 int eth_register(struct eth_device *dev);/* Register network device */
203 int eth_unregister(struct eth_device *dev);/* Remove network device */
205 extern struct eth_device *eth_current;
207 static __always_inline struct eth_device *eth_get_dev(void)
211 struct eth_device *eth_get_dev_by_name(const char *devname);
212 struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */
214 /* get the current device MAC */
215 static inline unsigned char *eth_get_ethaddr(void)
218 return eth_current->enetaddr;
222 /* Used only when NetConsole is enabled */
223 int eth_is_active(struct eth_device *dev); /* Test device for active state */
224 /* Set active state */
225 static __always_inline int eth_init_state_only(void)
227 eth_get_dev()->state = ETH_STATE_ACTIVE;
231 /* Set passive state */
232 static __always_inline void eth_halt_state_only(void)
234 eth_get_dev()->state = ETH_STATE_PASSIVE;
238 * Set the hardware address for an ethernet interface based on 'eth%daddr'
239 * environment variable (or just 'ethaddr' if eth_number is 0).
241 * base_name - base name for device (normally "eth")
242 * eth_number - value of %d (0 for first device of this type)
244 * 0 is success, non-zero is error status from driver.
246 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
249 int usb_eth_initialize(bd_t *bi);
252 int eth_initialize(void); /* Initialize network subsystem */
253 void eth_try_another(int first_restart); /* Change the device */
254 void eth_set_current(void); /* set nterface to ethcur var */
256 int eth_get_dev_index(void); /* get the device index */
259 * eth_env_set_enetaddr_by_index() - set the MAC address environment variable
261 * This sets up an environment variable with the given MAC address (@enetaddr).
262 * The environment variable to be set is defined by <@base_name><@index>addr.
263 * If @index is 0 it is omitted. For common Ethernet this means ethaddr,
266 * @base_name: Base name for variable, typically "eth"
267 * @index: Index of interface being updated (>=0)
268 * @enetaddr: Pointer to MAC address to put into the variable
269 * @return 0 if OK, other value on error
271 int eth_env_set_enetaddr_by_index(const char *base_name, int index,
276 * Initialize USB ethernet device with CONFIG_DM_ETH
278 * 0 is success, non-zero is error status.
280 int usb_ether_init(void);
283 * Get the hardware address for an ethernet interface .
285 * base_name - base name for device (normally "eth")
286 * index - device index number (0 for first)
287 * enetaddr - returns 6 byte hardware address
289 * Return true if the address is valid.
291 int eth_env_get_enetaddr_by_index(const char *base_name, int index,
294 int eth_init(void); /* Initialize the device */
295 int eth_send(void *packet, int length); /* Send a packet */
297 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
298 int eth_receive(void *packet, int length); /* Receive a packet*/
299 extern void (*push_packet)(void *packet, int length);
301 int eth_rx(void); /* Check for received packets */
302 void eth_halt(void); /* stop SCC */
303 const char *eth_get_name(void); /* get name of current device */
304 int eth_mcast_join(struct in_addr mcast_addr, int join);
306 /**********************************************************************/
315 struct ethernet_hdr {
316 u8 et_dest[ARP_HLEN]; /* Destination node */
317 u8 et_src[ARP_HLEN]; /* Source node */
318 u16 et_protlen; /* Protocol or length */
319 } __attribute__((packed));
321 /* Ethernet header size */
322 #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr))
324 #define ETH_FCS_LEN 4 /* Octets in the FCS */
327 u8 et_dest[ARP_HLEN]; /* Destination node */
328 u8 et_src[ARP_HLEN]; /* Source node */
329 u16 et_protlen; /* Protocol or length */
330 u8 et_dsap; /* 802 DSAP */
331 u8 et_ssap; /* 802 SSAP */
332 u8 et_ctl; /* 802 control */
333 u8 et_snap1; /* SNAP */
336 u16 et_prot; /* 802 protocol */
337 } __attribute__((packed));
339 /* 802 + SNAP + ethernet header size */
340 #define E802_HDR_SIZE (sizeof(struct e802_hdr))
343 * Virtual LAN Ethernet header
345 struct vlan_ethernet_hdr {
346 u8 vet_dest[ARP_HLEN]; /* Destination node */
347 u8 vet_src[ARP_HLEN]; /* Source node */
348 u16 vet_vlan_type; /* PROT_VLAN */
349 u16 vet_tag; /* TAG of VLAN */
350 u16 vet_type; /* protocol type */
351 } __attribute__((packed));
353 /* VLAN Ethernet header size */
354 #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr))
356 #define PROT_IP 0x0800 /* IP protocol */
357 #define PROT_ARP 0x0806 /* IP ARP protocol */
358 #define PROT_WOL 0x0842 /* ether-wake WoL protocol */
359 #define PROT_RARP 0x8035 /* IP ARP protocol */
360 #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */
361 #define PROT_IPV6 0x86dd /* IPv6 over bluebook */
362 #define PROT_PPP_SES 0x8864 /* PPPoE session messages */
363 #define PROT_NCSI 0x88f8 /* NC-SI control packets */
365 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
366 #define IPPROTO_UDP 17 /* User Datagram Protocol */
369 * Internet Protocol (IP) header.
372 u8 ip_hl_v; /* header length and version */
373 u8 ip_tos; /* type of service */
374 u16 ip_len; /* total length */
375 u16 ip_id; /* identification */
376 u16 ip_off; /* fragment offset field */
377 u8 ip_ttl; /* time to live */
378 u8 ip_p; /* protocol */
379 u16 ip_sum; /* checksum */
380 struct in_addr ip_src; /* Source IP address */
381 struct in_addr ip_dst; /* Destination IP address */
382 } __attribute__((packed));
384 #define IP_OFFS 0x1fff /* ip offset *= 8 */
385 #define IP_FLAGS 0xe000 /* first 3 bits */
386 #define IP_FLAGS_RES 0x8000 /* reserved */
387 #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */
388 #define IP_FLAGS_MFRAG 0x2000 /* more fragments */
390 #define IP_HDR_SIZE (sizeof(struct ip_hdr))
393 * Internet Protocol (IP) + UDP header.
396 u8 ip_hl_v; /* header length and version */
397 u8 ip_tos; /* type of service */
398 u16 ip_len; /* total length */
399 u16 ip_id; /* identification */
400 u16 ip_off; /* fragment offset field */
401 u8 ip_ttl; /* time to live */
402 u8 ip_p; /* protocol */
403 u16 ip_sum; /* checksum */
404 struct in_addr ip_src; /* Source IP address */
405 struct in_addr ip_dst; /* Destination IP address */
406 u16 udp_src; /* UDP source port */
407 u16 udp_dst; /* UDP destination port */
408 u16 udp_len; /* Length of UDP packet */
409 u16 udp_xsum; /* Checksum */
410 } __attribute__((packed));
412 #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr))
413 #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE)
416 * Address Resolution Protocol (ARP) header.
419 u16 ar_hrd; /* Format of hardware address */
420 # define ARP_ETHER 1 /* Ethernet hardware address */
421 u16 ar_pro; /* Format of protocol address */
422 u8 ar_hln; /* Length of hardware address */
423 u8 ar_pln; /* Length of protocol address */
425 u16 ar_op; /* Operation */
426 # define ARPOP_REQUEST 1 /* Request to resolve address */
427 # define ARPOP_REPLY 2 /* Response to previous request */
429 # define RARPOP_REQUEST 3 /* Request to resolve address */
430 # define RARPOP_REPLY 4 /* Response to previous request */
433 * The remaining fields are variable in size, according to
434 * the sizes above, and are defined as appropriate for
435 * specific hardware/protocol combinations.
438 #define ar_sha ar_data[0]
439 #define ar_spa ar_data[ARP_HLEN]
440 #define ar_tha ar_data[ARP_HLEN + ARP_PLEN]
441 #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN]
443 u8 ar_sha[]; /* Sender hardware address */
444 u8 ar_spa[]; /* Sender protocol address */
445 u8 ar_tha[]; /* Target hardware address */
446 u8 ar_tpa[]; /* Target protocol address */
448 } __attribute__((packed));
450 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
453 * ICMP stuff (just enough to handle (host) redirect messages)
455 #define ICMP_ECHO_REPLY 0 /* Echo reply */
456 #define ICMP_NOT_REACH 3 /* Detination unreachable */
457 #define ICMP_REDIRECT 5 /* Redirect (change route) */
458 #define ICMP_ECHO_REQUEST 8 /* Echo request */
460 /* Codes for REDIRECT. */
461 #define ICMP_REDIR_NET 0 /* Redirect Net */
462 #define ICMP_REDIR_HOST 1 /* Redirect Host */
464 /* Codes for NOT_REACH */
465 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */
483 } __attribute__((packed));
485 #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr))
486 #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE)
489 * Maximum packet size; used to allocate packet storage. Use
490 * the maxium Ethernet frame size as specified by the Ethernet
491 * standard including the 802.1Q tag (VLAN tagging).
492 * maximum packet size = 1522
493 * maximum packet size and multiple of 32 bytes = 1536
496 #define PKTSIZE_ALIGN 1536
499 * Maximum receive ring size; that is, the number of packets
500 * we can buffer before overflow happens. Basically, this just
501 * needs to be enough to prevent a packet being discarded while
502 * we are processing the previous one.
505 #define RINGSZ_LOG2 2
507 /**********************************************************************/
513 * All variables of type struct in_addr are stored in NETWORK byte order
518 /** BOOTP EXTENTIONS **/
519 extern struct in_addr net_gateway; /* Our gateway IP address */
520 extern struct in_addr net_netmask; /* Our subnet mask (0 = unknown) */
521 /* Our Domain Name Server (0 = unknown) */
522 extern struct in_addr net_dns_server;
523 #if defined(CONFIG_BOOTP_DNS2)
524 /* Our 2nd Domain Name Server (0 = unknown) */
525 extern struct in_addr net_dns_server2;
527 extern char net_nis_domain[32]; /* Our IS domain */
528 extern char net_hostname[32]; /* Our hostname */
529 extern char net_root_path[64]; /* Our root path */
530 /** END OF BOOTP EXTENTIONS **/
531 extern u8 net_ethaddr[ARP_HLEN]; /* Our ethernet address */
532 extern u8 net_server_ethaddr[ARP_HLEN]; /* Boot server enet address */
533 extern struct in_addr net_ip; /* Our IP addr (0 = unknown) */
534 extern struct in_addr net_server_ip; /* Server IP addr (0 = unknown) */
535 extern uchar *net_tx_packet; /* THE transmit packet */
536 extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */
537 extern uchar *net_rx_packet; /* Current receive packet */
538 extern int net_rx_packet_len; /* Current rx packet length */
539 extern const u8 net_bcast_ethaddr[ARP_HLEN]; /* Ethernet broadcast address */
540 extern const u8 net_null_ethaddr[ARP_HLEN];
542 #define VLAN_NONE 4095 /* untagged */
543 #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */
544 extern ushort net_our_vlan; /* Our VLAN */
545 extern ushort net_native_vlan; /* Our Native VLAN */
547 extern int net_restart_wrap; /* Tried all network devices */
550 BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
551 TFTPSRV, TFTPPUT, LINKLOCAL, FASTBOOT, WOL
554 extern char net_boot_file_name[1024];/* Boot File name */
555 /* Indicates whether the file name was specified on the command line */
556 extern bool net_boot_file_name_explicit;
557 /* The actual transferred size of the bootfile (in bytes) */
558 extern u32 net_boot_file_size;
559 /* Boot file size in blocks as reported by the DHCP server */
560 extern u32 net_boot_file_expected_size_in_blocks;
562 #if defined(CONFIG_CMD_DNS)
563 extern char *net_dns_resolve; /* The host to resolve */
564 extern char *net_dns_env_var; /* the env var to put the ip into */
567 #if defined(CONFIG_CMD_PING)
568 extern struct in_addr net_ping_ip; /* the ip address to ping */
571 #if defined(CONFIG_CMD_CDP)
572 /* when CDP completes these hold the return values */
573 extern ushort cdp_native_vlan; /* CDP returned native VLAN */
574 extern ushort cdp_appliance_vlan; /* CDP returned appliance VLAN */
577 * Check for a CDP packet by examining the received MAC address field
579 static inline int is_cdp_packet(const uchar *ethaddr)
581 extern const u8 net_cdp_ethaddr[ARP_HLEN];
583 return memcmp(ethaddr, net_cdp_ethaddr, ARP_HLEN) == 0;
587 #if defined(CONFIG_CMD_SNTP)
588 extern struct in_addr net_ntp_server; /* the ip address to NTP */
589 extern int net_ntp_time_offset; /* offset time from UTC */
592 /* Initialize the network adapter */
594 int net_loop(enum proto_t);
596 /* Load failed. Start again. */
597 int net_start_again(void);
599 /* Get size of the ethernet header when we send */
600 int net_eth_hdr_size(void);
602 /* Set ethernet header; returns the size of the header */
603 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot);
604 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot);
607 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source,
608 u16 pkt_len, u8 proto);
609 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport,
613 * compute_ip_checksum() - Compute IP checksum
615 * @addr: Address to check (must be 16-bit aligned)
616 * @nbytes: Number of bytes to check (normally a multiple of 2)
617 * @return 16-bit IP checksum
619 unsigned compute_ip_checksum(const void *addr, unsigned nbytes);
622 * add_ip_checksums() - add two IP checksums
624 * @offset: Offset of first sum (if odd we do a byte-swap)
625 * @sum: First checksum
626 * @new_sum: New checksum to add
627 * @return updated 16-bit IP checksum
629 unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum);
632 * ip_checksum_ok() - check if a checksum is correct
634 * This works by making sure the checksum sums to 0
636 * @addr: Address to check (must be 16-bit aligned)
637 * @nbytes: Number of bytes to check (normally a multiple of 2)
638 * @return true if the checksum matches, false if not
640 int ip_checksum_ok(const void *addr, unsigned nbytes);
643 rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */
644 void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */
645 rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */
646 void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */
647 bool arp_is_waiting(void); /* Waiting for ARP reply? */
648 void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
649 void net_set_timeout_handler(ulong, thand_f *);/* Set timeout handler */
651 /* Network loop state */
652 enum net_loop_state {
658 extern enum net_loop_state net_state;
660 static inline void net_set_state(enum net_loop_state state)
662 debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state);
667 * net_get_async_tx_pkt_buf - Get a packet buffer that is not in use for
668 * sending an asynchronous reply
670 * returns - ptr to packet buffer
672 uchar * net_get_async_tx_pkt_buf(void);
674 /* Transmit a packet */
675 static inline void net_send_packet(uchar *pkt, int len)
677 /* Currently no way to return errors from eth_send() */
678 (void) eth_send(pkt, len);
682 * Transmit "net_tx_packet" as UDP packet, performing ARP request if needed
683 * (ether will be populated)
685 * @param ether Raw packet buffer
686 * @param dest IP address to send the datagram to
687 * @param dport Destination UDP port
688 * @param sport Source UDP port
689 * @param payload_len Length of data after the UDP header
691 int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport,
692 int payload_len, int proto, u8 action, u32 tcp_seq_num,
694 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport,
695 int sport, int payload_len);
697 /* Processes a received packet */
698 void net_process_received_packet(uchar *in_packet, int len);
700 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
702 int nc_input_packet(uchar *pkt, struct in_addr src_ip, unsigned dest_port,
703 unsigned src_port, unsigned len);
706 static __always_inline int eth_is_on_demand_init(void)
708 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
709 extern enum proto_t net_loop_last_protocol;
711 return net_loop_last_protocol != NETCONS;
717 static inline void eth_set_last_protocol(int protocol)
719 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
720 extern enum proto_t net_loop_last_protocol;
722 net_loop_last_protocol = protocol;
727 * Check if autoload is enabled. If so, use either NFS or TFTP to download
730 void net_auto_load(void);
733 * The following functions are a bit ugly, but necessary to deal with
734 * alignment restrictions on ARM.
736 * We're using inline functions, which had the smallest memory
737 * footprint in our tests.
739 /* return IP *in network byteorder* */
740 static inline struct in_addr net_read_ip(void *from)
744 memcpy((void *)&ip, (void *)from, sizeof(ip));
748 /* return ulong *in network byteorder* */
749 static inline u32 net_read_u32(void *from)
753 memcpy((void *)&l, (void *)from, sizeof(l));
757 /* write IP *in network byteorder* */
758 static inline void net_write_ip(void *to, struct in_addr ip)
760 memcpy(to, (void *)&ip, sizeof(ip));
764 static inline void net_copy_ip(void *to, void *from)
766 memcpy((void *)to, from, sizeof(struct in_addr));
770 static inline void net_copy_u32(void *to, void *from)
772 memcpy((void *)to, (void *)from, sizeof(u32));
776 * is_zero_ethaddr - Determine if give Ethernet address is all zeros.
777 * @addr: Pointer to a six-byte array containing the Ethernet address
779 * Return true if the address is all zeroes.
781 static inline int is_zero_ethaddr(const u8 *addr)
783 return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
787 * is_multicast_ethaddr - Determine if the Ethernet address is a multicast.
788 * @addr: Pointer to a six-byte array containing the Ethernet address
790 * Return true if the address is a multicast address.
791 * By definition the broadcast address is also a multicast address.
793 static inline int is_multicast_ethaddr(const u8 *addr)
795 return 0x01 & addr[0];
799 * is_broadcast_ethaddr - Determine if the Ethernet address is broadcast
800 * @addr: Pointer to a six-byte array containing the Ethernet address
802 * Return true if the address is the broadcast address.
804 static inline int is_broadcast_ethaddr(const u8 *addr)
806 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) ==
811 * is_valid_ethaddr - Determine if the given Ethernet address is valid
812 * @addr: Pointer to a six-byte array containing the Ethernet address
814 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
815 * a multicast address, and is not FF:FF:FF:FF:FF:FF.
817 * Return true if the address is valid.
819 static inline int is_valid_ethaddr(const u8 *addr)
821 /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
822 * explicitly check for it here. */
823 return !is_multicast_ethaddr(addr) && !is_zero_ethaddr(addr);
827 * net_random_ethaddr - Generate software assigned random Ethernet address
828 * @addr: Pointer to a six-byte array containing the Ethernet address
830 * Generate a random Ethernet address (MAC) that is not multicast
831 * and has the local assigned bit set.
833 static inline void net_random_ethaddr(uchar *addr)
836 unsigned int seed = get_ticks();
838 for (i = 0; i < 6; i++)
839 addr[i] = rand_r(&seed);
841 addr[0] &= 0xfe; /* clear multicast bit */
842 addr[0] |= 0x02; /* set local assignment bit (IEEE802) */
846 * string_to_enetaddr() - Parse a MAC address
848 * Convert a string MAC address
850 * Implemented in lib/net_utils.c (built unconditionally)
852 * @addr: MAC address in aa:bb:cc:dd:ee:ff format, where each part is a 2-digit
854 * @enetaddr: Place to put MAC address (6 bytes)
856 void string_to_enetaddr(const char *addr, uint8_t *enetaddr);
858 /* Convert an IP address to a string */
859 void ip_to_string(struct in_addr x, char *s);
862 * string_to_ip() - Convert a string to ip address
864 * Implemented in lib/net_utils.c (built unconditionally)
866 * @s: Input string to parse
867 * @return: in_addr struct containing the parsed IP address
869 struct in_addr string_to_ip(const char *s);
871 /* Convert a VLAN id to a string */
872 void vlan_to_string(ushort x, char *s);
874 /* Convert a string to a vlan id */
875 ushort string_to_vlan(const char *s);
877 /* read a VLAN id from an environment variable */
878 ushort env_get_vlan(char *);
880 /* copy a filename (allow for "..." notation, limit length) */
881 void copy_filename(char *dst, const char *src, int size);
883 /* check if serverip is specified in filename from the command line */
884 int is_serverip_in_cmd(void);
887 * net_parse_bootfile - Parse the bootfile env var / cmd line param
889 * @param ipaddr - a pointer to the ipaddr to populate if included in bootfile
890 * @param filename - a pointer to the string to save the filename part
891 * @param max_len - The longest - 1 that the filename part can be
893 * return 1 if parsed, 0 if bootfile is empty
895 int net_parse_bootfile(struct in_addr *ipaddr, char *filename, int max_len);
897 /* get a random source port */
898 unsigned int random_port(void);
901 * update_tftp - Update firmware over TFTP (via DFU)
903 * This function updates board's firmware via TFTP
905 * @param addr - memory address where data is stored
906 * @param interface - the DFU medium name - e.g. "mmc"
907 * @param devstring - the DFU medium number - e.g. "1"
909 * @return - 0 on success, other value on failure
911 int update_tftp(ulong addr, char *interface, char *devstring);
914 * env_get_ip() - Convert an environment value to to an ip address
916 * @var: Environment variable to convert. The value of this variable must be
917 * in the format format a.b.c.d, where each value is a decimal number from
919 * @return IP address, or 0 if invalid
921 static inline struct in_addr env_get_ip(char *var)
923 return string_to_ip(env_get(var));
927 * reset_phy() - Reset the Ethernet PHY
929 * This should be implemented by boards if CONFIG_RESET_PHY_R is enabled
931 void reset_phy(void);
933 #endif /* __NET_H__ */