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 <linux/types.h>
16 #include <asm/cache.h>
17 #include <asm/byteorder.h> /* for nton* / ntoh* stuff */
21 #include <linux/if_ether.h>
28 #define DEBUG_LL_STATE 0 /* Link local state machine changes */
29 #define DEBUG_DEV_PKT 0 /* Packets or info directed to the device */
30 #define DEBUG_NET_PKT 0 /* Packets on info on the network at large */
31 #define DEBUG_INT_STATE 0 /* Internal network state changes */
34 * The number of receive packet buffers, and the required packet buffer
35 * alignment in memory.
38 #define PKTBUFSRX CONFIG_SYS_RX_ETH_BUFFER
39 #define PKTALIGN ARCH_DMA_MINALIGN
41 /* Number of packets processed together */
42 #define ETH_PACKETS_BATCH_RECV 32
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 *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 plat
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
155 * set_promisc: Enable or Disable promiscuous mode
158 int (*start)(struct udevice *dev);
159 int (*send)(struct udevice *dev, void *packet, int length);
160 int (*recv)(struct udevice *dev, int flags, uchar **packetp);
161 int (*free_pkt)(struct udevice *dev, uchar *packet, int length);
162 void (*stop)(struct udevice *dev);
163 int (*mcast)(struct udevice *dev, const u8 *enetaddr, int join);
164 int (*write_hwaddr)(struct udevice *dev);
165 int (*read_rom_hwaddr)(struct udevice *dev);
166 int (*set_promisc)(struct udevice *dev, bool enable);
169 #define eth_get_ops(dev) ((struct eth_ops *)(dev)->driver->ops)
171 struct udevice *eth_get_dev(void); /* get the current device */
173 * The devname can be either an exact name given by the driver or device tree
174 * or it can be an alias of the form "eth%d"
176 struct udevice *eth_get_dev_by_name(const char *devname);
177 unsigned char *eth_get_ethaddr(void); /* get the current device MAC */
179 /* Used only when NetConsole is enabled */
180 int eth_is_active(struct udevice *dev); /* Test device for active state */
181 int eth_init_state_only(void); /* Set active state */
182 void eth_halt_state_only(void); /* Set passive state */
185 #ifndef CONFIG_DM_ETH
187 #define ETH_NAME_LEN 20
188 char name[ETH_NAME_LEN];
189 unsigned char enetaddr[ARP_HLEN];
193 int (*init)(struct eth_device *eth, struct bd_info *bd);
194 int (*send)(struct eth_device *, void *packet, int length);
195 int (*recv)(struct eth_device *);
196 void (*halt)(struct eth_device *);
197 int (*mcast)(struct eth_device *, const u8 *enetaddr, int join);
198 int (*write_hwaddr)(struct eth_device *eth);
199 struct eth_device *next;
204 int eth_register(struct eth_device *dev);/* Register network device */
205 int eth_unregister(struct eth_device *dev);/* Remove network device */
207 extern struct eth_device *eth_current;
209 static __always_inline struct eth_device *eth_get_dev(void)
213 struct eth_device *eth_get_dev_by_name(const char *devname);
214 struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */
216 /* get the current device MAC */
217 static inline unsigned char *eth_get_ethaddr(void)
220 return eth_current->enetaddr;
224 /* Used only when NetConsole is enabled */
225 int eth_is_active(struct eth_device *dev); /* Test device for active state */
226 /* Set active state */
227 static __always_inline int eth_init_state_only(void)
229 eth_get_dev()->state = ETH_STATE_ACTIVE;
233 /* Set passive state */
234 static __always_inline void eth_halt_state_only(void)
236 eth_get_dev()->state = ETH_STATE_PASSIVE;
240 * Set the hardware address for an ethernet interface based on 'eth%daddr'
241 * environment variable (or just 'ethaddr' if eth_number is 0).
243 * base_name - base name for device (normally "eth")
244 * eth_number - value of %d (0 for first device of this type)
246 * 0 is success, non-zero is error status from driver.
248 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
251 int usb_eth_initialize(struct bd_info *bi);
254 int eth_initialize(void); /* Initialize network subsystem */
255 void eth_try_another(int first_restart); /* Change the device */
256 void eth_set_current(void); /* set nterface to ethcur var */
258 int eth_get_dev_index(void); /* get the device index */
261 * eth_env_set_enetaddr_by_index() - set the MAC address environment variable
263 * This sets up an environment variable with the given MAC address (@enetaddr).
264 * The environment variable to be set is defined by <@base_name><@index>addr.
265 * If @index is 0 it is omitted. For common Ethernet this means ethaddr,
268 * @base_name: Base name for variable, typically "eth"
269 * @index: Index of interface being updated (>=0)
270 * @enetaddr: Pointer to MAC address to put into the variable
271 * Return: 0 if OK, other value on error
273 int eth_env_set_enetaddr_by_index(const char *base_name, int index,
278 * Initialize USB ethernet device with CONFIG_DM_ETH
280 * 0 is success, non-zero is error status.
282 int usb_ether_init(void);
285 * Get the hardware address for an ethernet interface .
287 * base_name - base name for device (normally "eth")
288 * index - device index number (0 for first)
289 * enetaddr - returns 6 byte hardware address
291 * Return true if the address is valid.
293 int eth_env_get_enetaddr_by_index(const char *base_name, int index,
296 int eth_init(void); /* Initialize the device */
297 int eth_send(void *packet, int length); /* Send a packet */
299 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
300 int eth_receive(void *packet, int length); /* Receive a packet*/
301 extern void (*push_packet)(void *packet, int length);
303 int eth_rx(void); /* Check for received packets */
304 void eth_halt(void); /* stop SCC */
305 const char *eth_get_name(void); /* get name of current device */
306 int eth_mcast_join(struct in_addr mcast_addr, int join);
308 /**********************************************************************/
317 struct ethernet_hdr {
318 u8 et_dest[ARP_HLEN]; /* Destination node */
319 u8 et_src[ARP_HLEN]; /* Source node */
320 u16 et_protlen; /* Protocol or length */
321 } __attribute__((packed));
323 /* Ethernet header size */
324 #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr))
326 #define ETH_FCS_LEN 4 /* Octets in the FCS */
329 u8 et_dest[ARP_HLEN]; /* Destination node */
330 u8 et_src[ARP_HLEN]; /* Source node */
331 u16 et_protlen; /* Protocol or length */
332 u8 et_dsap; /* 802 DSAP */
333 u8 et_ssap; /* 802 SSAP */
334 u8 et_ctl; /* 802 control */
335 u8 et_snap1; /* SNAP */
338 u16 et_prot; /* 802 protocol */
339 } __attribute__((packed));
341 /* 802 + SNAP + ethernet header size */
342 #define E802_HDR_SIZE (sizeof(struct e802_hdr))
345 * Virtual LAN Ethernet header
347 struct vlan_ethernet_hdr {
348 u8 vet_dest[ARP_HLEN]; /* Destination node */
349 u8 vet_src[ARP_HLEN]; /* Source node */
350 u16 vet_vlan_type; /* PROT_VLAN */
351 u16 vet_tag; /* TAG of VLAN */
352 u16 vet_type; /* protocol type */
353 } __attribute__((packed));
355 /* VLAN Ethernet header size */
356 #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr))
358 #define PROT_IP 0x0800 /* IP protocol */
359 #define PROT_ARP 0x0806 /* IP ARP protocol */
360 #define PROT_WOL 0x0842 /* ether-wake WoL protocol */
361 #define PROT_RARP 0x8035 /* IP ARP protocol */
362 #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */
363 #define PROT_IPV6 0x86dd /* IPv6 over bluebook */
364 #define PROT_PPP_SES 0x8864 /* PPPoE session messages */
365 #define PROT_NCSI 0x88f8 /* NC-SI control packets */
367 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
368 #define IPPROTO_UDP 17 /* User Datagram Protocol */
371 * Internet Protocol (IP) header.
374 u8 ip_hl_v; /* header length and version */
375 u8 ip_tos; /* type of service */
376 u16 ip_len; /* total length */
377 u16 ip_id; /* identification */
378 u16 ip_off; /* fragment offset field */
379 u8 ip_ttl; /* time to live */
380 u8 ip_p; /* protocol */
381 u16 ip_sum; /* checksum */
382 struct in_addr ip_src; /* Source IP address */
383 struct in_addr ip_dst; /* Destination IP address */
384 } __attribute__((packed));
386 #define IP_OFFS 0x1fff /* ip offset *= 8 */
387 #define IP_FLAGS 0xe000 /* first 3 bits */
388 #define IP_FLAGS_RES 0x8000 /* reserved */
389 #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */
390 #define IP_FLAGS_MFRAG 0x2000 /* more fragments */
392 #define IP_HDR_SIZE (sizeof(struct ip_hdr))
395 * Internet Protocol (IP) + UDP header.
398 u8 ip_hl_v; /* header length and version */
399 u8 ip_tos; /* type of service */
400 u16 ip_len; /* total length */
401 u16 ip_id; /* identification */
402 u16 ip_off; /* fragment offset field */
403 u8 ip_ttl; /* time to live */
404 u8 ip_p; /* protocol */
405 u16 ip_sum; /* checksum */
406 struct in_addr ip_src; /* Source IP address */
407 struct in_addr ip_dst; /* Destination IP address */
408 u16 udp_src; /* UDP source port */
409 u16 udp_dst; /* UDP destination port */
410 u16 udp_len; /* Length of UDP packet */
411 u16 udp_xsum; /* Checksum */
412 } __attribute__((packed));
414 #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr))
415 #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE)
418 * Address Resolution Protocol (ARP) header.
421 u16 ar_hrd; /* Format of hardware address */
422 # define ARP_ETHER 1 /* Ethernet hardware address */
423 u16 ar_pro; /* Format of protocol address */
424 u8 ar_hln; /* Length of hardware address */
425 u8 ar_pln; /* Length of protocol address */
427 u16 ar_op; /* Operation */
428 # define ARPOP_REQUEST 1 /* Request to resolve address */
429 # define ARPOP_REPLY 2 /* Response to previous request */
431 # define RARPOP_REQUEST 3 /* Request to resolve address */
432 # define RARPOP_REPLY 4 /* Response to previous request */
435 * The remaining fields are variable in size, according to
436 * the sizes above, and are defined as appropriate for
437 * specific hardware/protocol combinations.
440 #define ar_sha ar_data[0]
441 #define ar_spa ar_data[ARP_HLEN]
442 #define ar_tha ar_data[ARP_HLEN + ARP_PLEN]
443 #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN]
445 u8 ar_sha[]; /* Sender hardware address */
446 u8 ar_spa[]; /* Sender protocol address */
447 u8 ar_tha[]; /* Target hardware address */
448 u8 ar_tpa[]; /* Target protocol address */
450 } __attribute__((packed));
452 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
455 * ICMP stuff (just enough to handle (host) redirect messages)
457 #define ICMP_ECHO_REPLY 0 /* Echo reply */
458 #define ICMP_NOT_REACH 3 /* Detination unreachable */
459 #define ICMP_REDIRECT 5 /* Redirect (change route) */
460 #define ICMP_ECHO_REQUEST 8 /* Echo request */
462 /* Codes for REDIRECT. */
463 #define ICMP_REDIR_NET 0 /* Redirect Net */
464 #define ICMP_REDIR_HOST 1 /* Redirect Host */
466 /* Codes for NOT_REACH */
467 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */
485 } __attribute__((packed));
487 #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr))
488 #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE)
491 * Maximum packet size; used to allocate packet storage. Use
492 * the maxium Ethernet frame size as specified by the Ethernet
493 * standard including the 802.1Q tag (VLAN tagging).
494 * maximum packet size = 1522
495 * maximum packet size and multiple of 32 bytes = 1536
498 #ifndef CONFIG_DM_DSA
499 #define PKTSIZE_ALIGN 1536
501 /* Maximum DSA tagging overhead (headroom and/or tailroom) */
502 #define DSA_MAX_OVR 256
503 #define PKTSIZE_ALIGN (1536 + DSA_MAX_OVR)
507 * Maximum receive ring size; that is, the number of packets
508 * we can buffer before overflow happens. Basically, this just
509 * needs to be enough to prevent a packet being discarded while
510 * we are processing the previous one.
513 #define RINGSZ_LOG2 2
515 /**********************************************************************/
521 * All variables of type struct in_addr are stored in NETWORK byte order
526 /** BOOTP EXTENTIONS **/
527 extern struct in_addr net_gateway; /* Our gateway IP address */
528 extern struct in_addr net_netmask; /* Our subnet mask (0 = unknown) */
529 /* Our Domain Name Server (0 = unknown) */
530 extern struct in_addr net_dns_server;
531 #if defined(CONFIG_BOOTP_DNS2)
532 /* Our 2nd Domain Name Server (0 = unknown) */
533 extern struct in_addr net_dns_server2;
535 extern char net_nis_domain[32]; /* Our IS domain */
536 extern char net_hostname[32]; /* Our hostname */
537 extern char net_root_path[64]; /* Our root path */
538 /** END OF BOOTP EXTENTIONS **/
539 extern u8 net_ethaddr[ARP_HLEN]; /* Our ethernet address */
540 extern u8 net_server_ethaddr[ARP_HLEN]; /* Boot server enet address */
541 extern struct in_addr net_ip; /* Our IP addr (0 = unknown) */
542 extern struct in_addr net_server_ip; /* Server IP addr (0 = unknown) */
543 extern uchar *net_tx_packet; /* THE transmit packet */
544 extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */
545 extern uchar *net_rx_packet; /* Current receive packet */
546 extern int net_rx_packet_len; /* Current rx packet length */
547 extern const u8 net_bcast_ethaddr[ARP_HLEN]; /* Ethernet broadcast address */
548 extern const u8 net_null_ethaddr[ARP_HLEN];
550 #define VLAN_NONE 4095 /* untagged */
551 #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */
552 extern ushort net_our_vlan; /* Our VLAN */
553 extern ushort net_native_vlan; /* Our Native VLAN */
555 extern int net_restart_wrap; /* Tried all network devices */
558 BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
559 TFTPSRV, TFTPPUT, LINKLOCAL, FASTBOOT, WOL, UDP
562 extern char net_boot_file_name[1024];/* Boot File name */
563 /* Indicates whether the file name was specified on the command line */
564 extern bool net_boot_file_name_explicit;
565 /* The actual transferred size of the bootfile (in bytes) */
566 extern u32 net_boot_file_size;
567 /* Boot file size in blocks as reported by the DHCP server */
568 extern u32 net_boot_file_expected_size_in_blocks;
570 #if defined(CONFIG_CMD_DNS)
571 extern char *net_dns_resolve; /* The host to resolve */
572 extern char *net_dns_env_var; /* the env var to put the ip into */
575 #if defined(CONFIG_CMD_PING)
576 extern struct in_addr net_ping_ip; /* the ip address to ping */
579 #if defined(CONFIG_CMD_CDP)
580 /* when CDP completes these hold the return values */
581 extern ushort cdp_native_vlan; /* CDP returned native VLAN */
582 extern ushort cdp_appliance_vlan; /* CDP returned appliance VLAN */
585 * Check for a CDP packet by examining the received MAC address field
587 static inline int is_cdp_packet(const uchar *ethaddr)
589 extern const u8 net_cdp_ethaddr[ARP_HLEN];
591 return memcmp(ethaddr, net_cdp_ethaddr, ARP_HLEN) == 0;
595 #if defined(CONFIG_CMD_SNTP)
596 extern struct in_addr net_ntp_server; /* the ip address to NTP */
597 extern int net_ntp_time_offset; /* offset time from UTC */
600 /* Initialize the network adapter */
602 int net_loop(enum proto_t);
604 /* Load failed. Start again. */
605 int net_start_again(void);
607 /* Get size of the ethernet header when we send */
608 int net_eth_hdr_size(void);
610 /* Set ethernet header; returns the size of the header */
611 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot);
612 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot);
615 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source,
616 u16 pkt_len, u8 proto);
617 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport,
621 * compute_ip_checksum() - Compute IP checksum
623 * @addr: Address to check (must be 16-bit aligned)
624 * @nbytes: Number of bytes to check (normally a multiple of 2)
625 * Return: 16-bit IP checksum
627 unsigned compute_ip_checksum(const void *addr, unsigned nbytes);
630 * add_ip_checksums() - add two IP checksums
632 * @offset: Offset of first sum (if odd we do a byte-swap)
633 * @sum: First checksum
634 * @new_sum: New checksum to add
635 * Return: updated 16-bit IP checksum
637 unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum);
640 * ip_checksum_ok() - check if a checksum is correct
642 * This works by making sure the checksum sums to 0
644 * @addr: Address to check (must be 16-bit aligned)
645 * @nbytes: Number of bytes to check (normally a multiple of 2)
646 * Return: true if the checksum matches, false if not
648 int ip_checksum_ok(const void *addr, unsigned nbytes);
651 rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */
652 void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */
653 rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */
654 void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */
655 bool arp_is_waiting(void); /* Waiting for ARP reply? */
656 void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
657 void net_set_timeout_handler(ulong, thand_f *);/* Set timeout handler */
659 /* Network loop state */
660 enum net_loop_state {
666 extern enum net_loop_state net_state;
668 static inline void net_set_state(enum net_loop_state state)
670 debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state);
675 * net_get_async_tx_pkt_buf - Get a packet buffer that is not in use for
676 * sending an asynchronous reply
678 * returns - ptr to packet buffer
680 uchar * net_get_async_tx_pkt_buf(void);
682 /* Transmit a packet */
683 static inline void net_send_packet(uchar *pkt, int len)
685 /* Currently no way to return errors from eth_send() */
686 (void) eth_send(pkt, len);
690 * Transmit "net_tx_packet" as UDP packet, performing ARP request if needed
691 * (ether will be populated)
693 * @param ether Raw packet buffer
694 * @param dest IP address to send the datagram to
695 * @param dport Destination UDP port
696 * @param sport Source UDP port
697 * @param payload_len Length of data after the UDP header
699 int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport,
700 int payload_len, int proto, u8 action, u32 tcp_seq_num,
702 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport,
703 int sport, int payload_len);
705 /* Processes a received packet */
706 void net_process_received_packet(uchar *in_packet, int len);
708 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
710 int nc_input_packet(uchar *pkt, struct in_addr src_ip, unsigned dest_port,
711 unsigned src_port, unsigned len);
714 static __always_inline int eth_is_on_demand_init(void)
716 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
717 extern enum proto_t net_loop_last_protocol;
719 return net_loop_last_protocol != NETCONS;
725 static inline void eth_set_last_protocol(int protocol)
727 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
728 extern enum proto_t net_loop_last_protocol;
730 net_loop_last_protocol = protocol;
735 * Check if autoload is enabled. If so, use either NFS or TFTP to download
738 void net_auto_load(void);
741 * The following functions are a bit ugly, but necessary to deal with
742 * alignment restrictions on ARM.
744 * We're using inline functions, which had the smallest memory
745 * footprint in our tests.
747 /* return IP *in network byteorder* */
748 static inline struct in_addr net_read_ip(void *from)
752 memcpy((void *)&ip, (void *)from, sizeof(ip));
756 /* return ulong *in network byteorder* */
757 static inline u32 net_read_u32(void *from)
761 memcpy((void *)&l, (void *)from, sizeof(l));
765 /* write IP *in network byteorder* */
766 static inline void net_write_ip(void *to, struct in_addr ip)
768 memcpy(to, (void *)&ip, sizeof(ip));
772 static inline void net_copy_ip(void *to, void *from)
774 memcpy((void *)to, from, sizeof(struct in_addr));
778 static inline void net_copy_u32(void *to, void *from)
780 memcpy((void *)to, (void *)from, sizeof(u32));
784 * is_zero_ethaddr - Determine if give Ethernet address is all zeros.
785 * @addr: Pointer to a six-byte array containing the Ethernet address
787 * Return true if the address is all zeroes.
789 static inline int is_zero_ethaddr(const u8 *addr)
791 return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
795 * is_multicast_ethaddr - Determine if the Ethernet address is a multicast.
796 * @addr: Pointer to a six-byte array containing the Ethernet address
798 * Return true if the address is a multicast address.
799 * By definition the broadcast address is also a multicast address.
801 static inline int is_multicast_ethaddr(const u8 *addr)
803 return 0x01 & addr[0];
807 * is_broadcast_ethaddr - Determine if the Ethernet address is broadcast
808 * @addr: Pointer to a six-byte array containing the Ethernet address
810 * Return true if the address is the broadcast address.
812 static inline int is_broadcast_ethaddr(const u8 *addr)
814 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) ==
819 * is_valid_ethaddr - Determine if the given Ethernet address is valid
820 * @addr: Pointer to a six-byte array containing the Ethernet address
822 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
823 * a multicast address, and is not FF:FF:FF:FF:FF:FF.
825 * Return true if the address is valid.
827 static inline int is_valid_ethaddr(const u8 *addr)
829 /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
830 * explicitly check for it here. */
831 return !is_multicast_ethaddr(addr) && !is_zero_ethaddr(addr);
835 * net_random_ethaddr - Generate software assigned random Ethernet address
836 * @addr: Pointer to a six-byte array containing the Ethernet address
838 * Generate a random Ethernet address (MAC) that is not multicast
839 * and has the local assigned bit set.
841 static inline void net_random_ethaddr(uchar *addr)
844 unsigned int seed = get_ticks();
846 for (i = 0; i < 6; i++)
847 addr[i] = rand_r(&seed);
849 addr[0] &= 0xfe; /* clear multicast bit */
850 addr[0] |= 0x02; /* set local assignment bit (IEEE802) */
854 * string_to_enetaddr() - Parse a MAC address
856 * Convert a string MAC address
858 * Implemented in lib/net_utils.c (built unconditionally)
860 * @addr: MAC address in aa:bb:cc:dd:ee:ff format, where each part is a 2-digit
862 * @enetaddr: Place to put MAC address (6 bytes)
864 void string_to_enetaddr(const char *addr, uint8_t *enetaddr);
866 /* Convert an IP address to a string */
867 void ip_to_string(struct in_addr x, char *s);
870 * string_to_ip() - Convert a string to ip address
872 * Implemented in lib/net_utils.c (built unconditionally)
874 * @s: Input string to parse
875 * @return: in_addr struct containing the parsed IP address
877 struct in_addr string_to_ip(const char *s);
879 /* Convert a VLAN id to a string */
880 void vlan_to_string(ushort x, char *s);
882 /* Convert a string to a vlan id */
883 ushort string_to_vlan(const char *s);
885 /* read a VLAN id from an environment variable */
886 ushort env_get_vlan(char *);
888 /* copy a filename (allow for "..." notation, limit length) */
889 void copy_filename(char *dst, const char *src, int size);
891 /* check if serverip is specified in filename from the command line */
892 int is_serverip_in_cmd(void);
895 * net_parse_bootfile - Parse the bootfile env var / cmd line param
897 * @param ipaddr - a pointer to the ipaddr to populate if included in bootfile
898 * @param filename - a pointer to the string to save the filename part
899 * @param max_len - The longest - 1 that the filename part can be
901 * return 1 if parsed, 0 if bootfile is empty
903 int net_parse_bootfile(struct in_addr *ipaddr, char *filename, int max_len);
906 * update_tftp - Update firmware over TFTP (via DFU)
908 * This function updates board's firmware via TFTP
910 * @param addr - memory address where data is stored
911 * @param interface - the DFU medium name - e.g. "mmc"
912 * @param devstring - the DFU medium number - e.g. "1"
914 * Return: - 0 on success, other value on failure
916 int update_tftp(ulong addr, char *interface, char *devstring);
919 * env_get_ip() - Convert an environment value to to an ip address
921 * @var: Environment variable to convert. The value of this variable must be
922 * in the format format a.b.c.d, where each value is a decimal number from
924 * Return: IP address, or 0 if invalid
926 static inline struct in_addr env_get_ip(char *var)
928 return string_to_ip(env_get(var));
932 * reset_phy() - Reset the Ethernet PHY
934 * This should be implemented by boards if CONFIG_RESET_PHY_R is enabled
936 void reset_phy(void);
938 #endif /* __NET_H__ */