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);
105 * struct eth_pdata - Platform data for Ethernet MAC controllers
107 * @iobase: The base address of the hardware registers
108 * @enetaddr: The Ethernet MAC address that is loaded from EEPROM or env
109 * @phy_interface: PHY interface to use - see PHY_INTERFACE_MODE_...
110 * @max_speed: Maximum speed of Ethernet connection supported by MAC
111 * @priv_pdata: device specific plat
115 unsigned char enetaddr[ARP_HLEN];
121 enum eth_recv_flags {
123 * Check hardware device for new packets (otherwise only return those
124 * which are already in the memory buffer ready to process)
126 ETH_RECV_CHECK_DEVICE = 1 << 0,
130 * struct eth_ops - functions of Ethernet MAC controllers
132 * start: Prepare the hardware to send and receive packets
133 * send: Send the bytes passed in "packet" as a packet on the wire
134 * recv: Check if the hardware received a packet. If so, set the pointer to the
135 * packet buffer in the packetp parameter. If not, return an error or 0 to
136 * indicate that the hardware receive FIFO is empty. If 0 is returned, the
137 * network stack will not process the empty packet, but free_pkt() will be
139 * free_pkt: Give the driver an opportunity to manage its packet buffer memory
140 * when the network stack is finished processing it. This will only be
141 * called when no error was returned from recv - optional
142 * stop: Stop the hardware from looking for packets - may be called even if
144 * mcast: Join or leave a multicast group (for TFTP) - optional
145 * write_hwaddr: Write a MAC address to the hardware (used to pass it to Linux
146 * on some platforms like ARM). This function expects the
147 * eth_pdata::enetaddr field to be populated. The method can
148 * return -ENOSYS to indicate that this is not implemented for
149 this hardware - optional.
150 * read_rom_hwaddr: Some devices have a backup of the MAC address stored in a
151 * ROM on the board. This is how the driver should expose it
152 * to the network stack. This function should fill in the
153 * eth_pdata::enetaddr field - optional
154 * set_promisc: Enable or Disable promiscuous mode
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);
165 int (*set_promisc)(struct udevice *dev, bool enable);
168 #define eth_get_ops(dev) ((struct eth_ops *)(dev)->driver->ops)
170 struct udevice *eth_get_dev(void); /* get the current device */
172 * The devname can be either an exact name given by the driver or device tree
173 * or it can be an alias of the form "eth%d"
175 struct udevice *eth_get_dev_by_name(const char *devname);
176 unsigned char *eth_get_ethaddr(void); /* get the current device MAC */
178 /* Used only when NetConsole is enabled */
179 int eth_is_active(struct udevice *dev); /* Test device for active state */
180 int eth_init_state_only(void); /* Set active state */
181 void eth_halt_state_only(void); /* Set passive state */
183 int eth_initialize(void); /* Initialize network subsystem */
184 void eth_try_another(int first_restart); /* Change the device */
185 void eth_set_current(void); /* set nterface to ethcur var */
187 int eth_get_dev_index(void); /* get the device index */
190 * eth_env_set_enetaddr_by_index() - set the MAC address environment variable
192 * This sets up an environment variable with the given MAC address (@enetaddr).
193 * The environment variable to be set is defined by <@base_name><@index>addr.
194 * If @index is 0 it is omitted. For common Ethernet this means ethaddr,
197 * @base_name: Base name for variable, typically "eth"
198 * @index: Index of interface being updated (>=0)
199 * @enetaddr: Pointer to MAC address to put into the variable
200 * Return: 0 if OK, other value on error
202 int eth_env_set_enetaddr_by_index(const char *base_name, int index,
207 * Initialize USB ethernet device with CONFIG_DM_ETH
209 * 0 is success, non-zero is error status.
211 int usb_ether_init(void);
214 * Get the hardware address for an ethernet interface .
216 * base_name - base name for device (normally "eth")
217 * index - device index number (0 for first)
218 * enetaddr - returns 6 byte hardware address
220 * Return true if the address is valid.
222 int eth_env_get_enetaddr_by_index(const char *base_name, int index,
225 int eth_init(void); /* Initialize the device */
226 int eth_send(void *packet, int length); /* Send a packet */
228 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
229 int eth_receive(void *packet, int length); /* Receive a packet*/
230 extern void (*push_packet)(void *packet, int length);
232 int eth_rx(void); /* Check for received packets */
233 void eth_halt(void); /* stop SCC */
234 const char *eth_get_name(void); /* get name of current device */
235 int eth_mcast_join(struct in_addr mcast_addr, int join);
237 /**********************************************************************/
246 struct ethernet_hdr {
247 u8 et_dest[ARP_HLEN]; /* Destination node */
248 u8 et_src[ARP_HLEN]; /* Source node */
249 u16 et_protlen; /* Protocol or length */
250 } __attribute__((packed));
252 /* Ethernet header size */
253 #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr))
255 #define ETH_FCS_LEN 4 /* Octets in the FCS */
258 u8 et_dest[ARP_HLEN]; /* Destination node */
259 u8 et_src[ARP_HLEN]; /* Source node */
260 u16 et_protlen; /* Protocol or length */
261 u8 et_dsap; /* 802 DSAP */
262 u8 et_ssap; /* 802 SSAP */
263 u8 et_ctl; /* 802 control */
264 u8 et_snap1; /* SNAP */
267 u16 et_prot; /* 802 protocol */
268 } __attribute__((packed));
270 /* 802 + SNAP + ethernet header size */
271 #define E802_HDR_SIZE (sizeof(struct e802_hdr))
274 * Virtual LAN Ethernet header
276 struct vlan_ethernet_hdr {
277 u8 vet_dest[ARP_HLEN]; /* Destination node */
278 u8 vet_src[ARP_HLEN]; /* Source node */
279 u16 vet_vlan_type; /* PROT_VLAN */
280 u16 vet_tag; /* TAG of VLAN */
281 u16 vet_type; /* protocol type */
282 } __attribute__((packed));
284 /* VLAN Ethernet header size */
285 #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr))
287 #define PROT_IP 0x0800 /* IP protocol */
288 #define PROT_ARP 0x0806 /* IP ARP protocol */
289 #define PROT_WOL 0x0842 /* ether-wake WoL protocol */
290 #define PROT_RARP 0x8035 /* IP ARP protocol */
291 #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */
292 #define PROT_IPV6 0x86dd /* IPv6 over bluebook */
293 #define PROT_PPP_SES 0x8864 /* PPPoE session messages */
294 #define PROT_NCSI 0x88f8 /* NC-SI control packets */
296 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
297 #define IPPROTO_TCP 6 /* Transmission Control Protocol */
298 #define IPPROTO_UDP 17 /* User Datagram Protocol */
301 * Internet Protocol (IP) header.
304 u8 ip_hl_v; /* header length and version */
305 u8 ip_tos; /* type of service */
306 u16 ip_len; /* total length */
307 u16 ip_id; /* identification */
308 u16 ip_off; /* fragment offset field */
309 u8 ip_ttl; /* time to live */
310 u8 ip_p; /* protocol */
311 u16 ip_sum; /* checksum */
312 struct in_addr ip_src; /* Source IP address */
313 struct in_addr ip_dst; /* Destination IP address */
314 } __attribute__((packed));
316 #define IP_OFFS 0x1fff /* ip offset *= 8 */
317 #define IP_FLAGS 0xe000 /* first 3 bits */
318 #define IP_FLAGS_RES 0x8000 /* reserved */
319 #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */
320 #define IP_FLAGS_MFRAG 0x2000 /* more fragments */
322 #define IP_HDR_SIZE (sizeof(struct ip_hdr))
324 #define IP_MIN_FRAG_DATAGRAM_SIZE (IP_HDR_SIZE + 8)
327 * Internet Protocol (IP) + UDP header.
330 u8 ip_hl_v; /* header length and version */
331 u8 ip_tos; /* type of service */
332 u16 ip_len; /* total length */
333 u16 ip_id; /* identification */
334 u16 ip_off; /* fragment offset field */
335 u8 ip_ttl; /* time to live */
336 u8 ip_p; /* protocol */
337 u16 ip_sum; /* checksum */
338 struct in_addr ip_src; /* Source IP address */
339 struct in_addr ip_dst; /* Destination IP address */
340 u16 udp_src; /* UDP source port */
341 u16 udp_dst; /* UDP destination port */
342 u16 udp_len; /* Length of UDP packet */
343 u16 udp_xsum; /* Checksum */
344 } __attribute__((packed));
346 #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr))
347 #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE)
350 * Address Resolution Protocol (ARP) header.
353 u16 ar_hrd; /* Format of hardware address */
354 # define ARP_ETHER 1 /* Ethernet hardware address */
355 u16 ar_pro; /* Format of protocol address */
356 u8 ar_hln; /* Length of hardware address */
357 u8 ar_pln; /* Length of protocol address */
359 u16 ar_op; /* Operation */
360 # define ARPOP_REQUEST 1 /* Request to resolve address */
361 # define ARPOP_REPLY 2 /* Response to previous request */
363 # define RARPOP_REQUEST 3 /* Request to resolve address */
364 # define RARPOP_REPLY 4 /* Response to previous request */
367 * The remaining fields are variable in size, according to
368 * the sizes above, and are defined as appropriate for
369 * specific hardware/protocol combinations.
372 #define ar_sha ar_data[0]
373 #define ar_spa ar_data[ARP_HLEN]
374 #define ar_tha ar_data[ARP_HLEN + ARP_PLEN]
375 #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN]
377 u8 ar_sha[]; /* Sender hardware address */
378 u8 ar_spa[]; /* Sender protocol address */
379 u8 ar_tha[]; /* Target hardware address */
380 u8 ar_tpa[]; /* Target protocol address */
382 } __attribute__((packed));
384 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
387 * ICMP stuff (just enough to handle (host) redirect messages)
389 #define ICMP_ECHO_REPLY 0 /* Echo reply */
390 #define ICMP_NOT_REACH 3 /* Detination unreachable */
391 #define ICMP_REDIRECT 5 /* Redirect (change route) */
392 #define ICMP_ECHO_REQUEST 8 /* Echo request */
394 /* Codes for REDIRECT. */
395 #define ICMP_REDIR_NET 0 /* Redirect Net */
396 #define ICMP_REDIR_HOST 1 /* Redirect Host */
398 /* Codes for NOT_REACH */
399 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */
417 } __attribute__((packed));
419 #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr))
420 #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE)
423 * Maximum packet size; used to allocate packet storage. Use
424 * the maxium Ethernet frame size as specified by the Ethernet
425 * standard including the 802.1Q tag (VLAN tagging).
426 * maximum packet size = 1522
427 * maximum packet size and multiple of 32 bytes = 1536
430 #ifndef CONFIG_DM_DSA
431 #define PKTSIZE_ALIGN 1536
433 /* Maximum DSA tagging overhead (headroom and/or tailroom) */
434 #define DSA_MAX_OVR 256
435 #define PKTSIZE_ALIGN (1536 + DSA_MAX_OVR)
439 * Maximum receive ring size; that is, the number of packets
440 * we can buffer before overflow happens. Basically, this just
441 * needs to be enough to prevent a packet being discarded while
442 * we are processing the previous one.
445 #define RINGSZ_LOG2 2
447 /**********************************************************************/
453 * All variables of type struct in_addr are stored in NETWORK byte order
458 /** BOOTP EXTENTIONS **/
459 extern struct in_addr net_gateway; /* Our gateway IP address */
460 extern struct in_addr net_netmask; /* Our subnet mask (0 = unknown) */
461 /* Our Domain Name Server (0 = unknown) */
462 extern struct in_addr net_dns_server;
463 #if defined(CONFIG_BOOTP_DNS2)
464 /* Our 2nd Domain Name Server (0 = unknown) */
465 extern struct in_addr net_dns_server2;
467 extern char net_nis_domain[32]; /* Our IS domain */
468 extern char net_hostname[32]; /* Our hostname */
470 extern char net_root_path[CONFIG_BOOTP_MAX_ROOT_PATH_LEN]; /* Our root path */
472 /** END OF BOOTP EXTENTIONS **/
473 extern u8 net_ethaddr[ARP_HLEN]; /* Our ethernet address */
474 extern u8 net_server_ethaddr[ARP_HLEN]; /* Boot server enet address */
475 extern struct in_addr net_ip; /* Our IP addr (0 = unknown) */
476 extern struct in_addr net_server_ip; /* Server IP addr (0 = unknown) */
477 extern uchar *net_tx_packet; /* THE transmit packet */
478 extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */
479 extern uchar *net_rx_packet; /* Current receive packet */
480 extern int net_rx_packet_len; /* Current rx packet length */
481 extern const u8 net_bcast_ethaddr[ARP_HLEN]; /* Ethernet broadcast address */
482 extern const u8 net_null_ethaddr[ARP_HLEN];
484 #define VLAN_NONE 4095 /* untagged */
485 #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */
486 extern ushort net_our_vlan; /* Our VLAN */
487 extern ushort net_native_vlan; /* Our Native VLAN */
489 extern int net_restart_wrap; /* Tried all network devices */
492 BOOTP, RARP, ARP, TFTPGET, DHCP, PING, PING6, DNS, NFS, CDP, NETCONS,
493 SNTP, TFTPSRV, TFTPPUT, LINKLOCAL, FASTBOOT, WOL, UDP, NCSI, WGET
496 extern char net_boot_file_name[1024];/* Boot File name */
497 /* Indicates whether the file name was specified on the command line */
498 extern bool net_boot_file_name_explicit;
499 /* The actual transferred size of the bootfile (in bytes) */
500 extern u32 net_boot_file_size;
501 /* Boot file size in blocks as reported by the DHCP server */
502 extern u32 net_boot_file_expected_size_in_blocks;
504 #if defined(CONFIG_CMD_DNS)
505 extern char *net_dns_resolve; /* The host to resolve */
506 extern char *net_dns_env_var; /* the env var to put the ip into */
509 #if defined(CONFIG_CMD_PING)
510 extern struct in_addr net_ping_ip; /* the ip address to ping */
513 #if defined(CONFIG_CMD_CDP)
514 /* when CDP completes these hold the return values */
515 extern ushort cdp_native_vlan; /* CDP returned native VLAN */
516 extern ushort cdp_appliance_vlan; /* CDP returned appliance VLAN */
519 * Check for a CDP packet by examining the received MAC address field
521 static inline int is_cdp_packet(const uchar *ethaddr)
523 extern const u8 net_cdp_ethaddr[ARP_HLEN];
525 return memcmp(ethaddr, net_cdp_ethaddr, ARP_HLEN) == 0;
529 #if defined(CONFIG_CMD_SNTP)
530 extern struct in_addr net_ntp_server; /* the ip address to NTP */
531 extern int net_ntp_time_offset; /* offset time from UTC */
534 /* Initialize the network adapter */
536 int net_loop(enum proto_t);
538 /* Load failed. Start again. */
539 int net_start_again(void);
541 /* Get size of the ethernet header when we send */
542 int net_eth_hdr_size(void);
544 /* Set ethernet header; returns the size of the header */
545 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot);
546 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot);
549 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source,
550 u16 pkt_len, u8 proto);
551 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport,
555 * compute_ip_checksum() - Compute IP checksum
557 * @addr: Address to check (must be 16-bit aligned)
558 * @nbytes: Number of bytes to check (normally a multiple of 2)
559 * Return: 16-bit IP checksum
561 unsigned compute_ip_checksum(const void *addr, unsigned nbytes);
564 * add_ip_checksums() - add two IP checksums
566 * @offset: Offset of first sum (if odd we do a byte-swap)
567 * @sum: First checksum
568 * @new_sum: New checksum to add
569 * Return: updated 16-bit IP checksum
571 unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum);
574 * ip_checksum_ok() - check if a checksum is correct
576 * This works by making sure the checksum sums to 0
578 * @addr: Address to check (must be 16-bit aligned)
579 * @nbytes: Number of bytes to check (normally a multiple of 2)
580 * Return: true if the checksum matches, false if not
582 int ip_checksum_ok(const void *addr, unsigned nbytes);
585 rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */
586 void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */
587 rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */
588 void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */
589 bool arp_is_waiting(void); /* Waiting for ARP reply? */
590 void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
591 void net_set_timeout_handler(ulong, thand_f *);/* Set timeout handler */
593 /* Network loop state */
594 enum net_loop_state {
600 extern enum net_loop_state net_state;
602 static inline void net_set_state(enum net_loop_state state)
604 debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state);
609 * net_get_async_tx_pkt_buf - Get a packet buffer that is not in use for
610 * sending an asynchronous reply
612 * returns - ptr to packet buffer
614 uchar * net_get_async_tx_pkt_buf(void);
616 /* Transmit a packet */
617 static inline void net_send_packet(uchar *pkt, int len)
619 /* Currently no way to return errors from eth_send() */
620 (void) eth_send(pkt, len);
624 * net_send_ip_packet() - Transmit "net_tx_packet" as UDP or TCP packet,
625 * send ARP request if needed (ether will be populated)
626 * @ether: Raw packet buffer
627 * @dest: IP address to send the datagram to
628 * @dport: Destination UDP port
629 * @sport: Source UDP port
630 * @payload_len: Length of data after the UDP header
631 * @action: TCP action to be performed
632 * @tcp_seq_num: TCP sequence number of this transmission
633 * @tcp_ack_num: TCP stream acknolegement number
635 * Return: 0 on success, other value on failure
637 int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport,
638 int payload_len, int proto, u8 action, u32 tcp_seq_num,
641 * net_send_tcp_packet() - Transmit TCP packet.
642 * @payload_len: length of payload
643 * @dport: Destination TCP port
644 * @sport: Source TCP port
645 * @action: TCP action to be performed
646 * @tcp_seq_num: TCP sequence number of this transmission
647 * @tcp_ack_num: TCP stream acknolegement number
649 * Return: 0 on success, other value on failure
651 int net_send_tcp_packet(int payload_len, int dport, int sport, u8 action,
652 u32 tcp_seq_num, u32 tcp_ack_num);
653 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport,
654 int sport, int payload_len);
656 /* Processes a received packet */
657 void net_process_received_packet(uchar *in_packet, int len);
659 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
661 int nc_input_packet(uchar *pkt, struct in_addr src_ip, unsigned dest_port,
662 unsigned src_port, unsigned len);
665 static __always_inline int eth_is_on_demand_init(void)
667 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
668 extern enum proto_t net_loop_last_protocol;
670 return net_loop_last_protocol != NETCONS;
676 static inline void eth_set_last_protocol(int protocol)
678 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
679 extern enum proto_t net_loop_last_protocol;
681 net_loop_last_protocol = protocol;
686 * Check if autoload is enabled. If so, use either NFS or TFTP to download
689 void net_auto_load(void);
692 * The following functions are a bit ugly, but necessary to deal with
693 * alignment restrictions on ARM.
695 * We're using inline functions, which had the smallest memory
696 * footprint in our tests.
698 /* return IP *in network byteorder* */
699 static inline struct in_addr net_read_ip(void *from)
703 memcpy((void *)&ip, (void *)from, sizeof(ip));
707 /* return ulong *in network byteorder* */
708 static inline u32 net_read_u32(void *from)
712 memcpy((void *)&l, (void *)from, sizeof(l));
716 /* write IP *in network byteorder* */
717 static inline void net_write_ip(void *to, struct in_addr ip)
719 memcpy(to, (void *)&ip, sizeof(ip));
723 static inline void net_copy_ip(void *to, void *from)
725 memcpy((void *)to, from, sizeof(struct in_addr));
729 static inline void net_copy_u32(void *to, void *from)
731 memcpy((void *)to, (void *)from, sizeof(u32));
735 * is_zero_ethaddr - Determine if give Ethernet address is all zeros.
736 * @addr: Pointer to a six-byte array containing the Ethernet address
738 * Return true if the address is all zeroes.
740 static inline int is_zero_ethaddr(const u8 *addr)
742 return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
746 * is_multicast_ethaddr - Determine if the Ethernet address is a multicast.
747 * @addr: Pointer to a six-byte array containing the Ethernet address
749 * Return true if the address is a multicast address.
750 * By definition the broadcast address is also a multicast address.
752 static inline int is_multicast_ethaddr(const u8 *addr)
754 return 0x01 & addr[0];
758 * is_broadcast_ethaddr - Determine if the Ethernet address is broadcast
759 * @addr: Pointer to a six-byte array containing the Ethernet address
761 * Return true if the address is the broadcast address.
763 static inline int is_broadcast_ethaddr(const u8 *addr)
765 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) ==
770 * is_valid_ethaddr - Determine if the given Ethernet address is valid
771 * @addr: Pointer to a six-byte array containing the Ethernet address
773 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
774 * a multicast address, and is not FF:FF:FF:FF:FF:FF.
776 * Return true if the address is valid.
778 static inline int is_valid_ethaddr(const u8 *addr)
780 /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
781 * explicitly check for it here. */
782 return !is_multicast_ethaddr(addr) && !is_zero_ethaddr(addr);
786 * net_random_ethaddr - Generate software assigned random Ethernet address
787 * @addr: Pointer to a six-byte array containing the Ethernet address
789 * Generate a random Ethernet address (MAC) that is not multicast
790 * and has the local assigned bit set.
792 static inline void net_random_ethaddr(uchar *addr)
795 unsigned int seed = get_ticks();
797 for (i = 0; i < 6; i++)
798 addr[i] = rand_r(&seed);
800 addr[0] &= 0xfe; /* clear multicast bit */
801 addr[0] |= 0x02; /* set local assignment bit (IEEE802) */
805 * string_to_enetaddr() - Parse a MAC address
807 * Convert a string MAC address
809 * Implemented in lib/net_utils.c (built unconditionally)
811 * @addr: MAC address in aa:bb:cc:dd:ee:ff format, where each part is a 2-digit
813 * @enetaddr: Place to put MAC address (6 bytes)
815 void string_to_enetaddr(const char *addr, uint8_t *enetaddr);
817 /* Convert an IP address to a string */
818 void ip_to_string(struct in_addr x, char *s);
821 * string_to_ip() - Convert a string to ip address
823 * Implemented in lib/net_utils.c (built unconditionally)
825 * @s: Input string to parse
826 * @return: in_addr struct containing the parsed IP address
828 struct in_addr string_to_ip(const char *s);
830 /* Convert a VLAN id to a string */
831 void vlan_to_string(ushort x, char *s);
833 /* Convert a string to a vlan id */
834 ushort string_to_vlan(const char *s);
836 /* read a VLAN id from an environment variable */
837 ushort env_get_vlan(char *);
839 /* copy a filename (allow for "..." notation, limit length) */
840 void copy_filename(char *dst, const char *src, int size);
842 /* check if serverip is specified in filename from the command line */
843 int is_serverip_in_cmd(void);
846 * net_parse_bootfile - Parse the bootfile env var / cmd line param
848 * @param ipaddr - a pointer to the ipaddr to populate if included in bootfile
849 * @param filename - a pointer to the string to save the filename part
850 * @param max_len - The longest - 1 that the filename part can be
852 * return 1 if parsed, 0 if bootfile is empty
854 int net_parse_bootfile(struct in_addr *ipaddr, char *filename, int max_len);
857 * update_tftp - Update firmware over TFTP (via DFU)
859 * This function updates board's firmware via TFTP
861 * @param addr - memory address where data is stored
862 * @param interface - the DFU medium name - e.g. "mmc"
863 * @param devstring - the DFU medium number - e.g. "1"
865 * Return: - 0 on success, other value on failure
867 int update_tftp(ulong addr, char *interface, char *devstring);
870 * env_get_ip() - Convert an environment value to to an ip address
872 * @var: Environment variable to convert. The value of this variable must be
873 * in the format format a.b.c.d, where each value is a decimal number from
875 * Return: IP address, or 0 if invalid
877 static inline struct in_addr env_get_ip(char *var)
879 return string_to_ip(env_get(var));
883 * reset_phy() - Reset the Ethernet PHY
885 * This should be implemented by boards if CONFIG_RESET_PHY_R is enabled
887 void reset_phy(void);
889 #endif /* __NET_H__ */