include/net.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  *      LiMon Monitor (LiMon) - Network.
   4  *
   5  *      Copyright 1994 - 2000 Neil Russell.
   6  *      (See License)
   7  *
   8  * History
   9  *      9/16/00   bor  adapted to TQM823L/STK8xxL board, RARP/TFTP boot added
  10  */
  11
  12 #ifndef __NET_H__
  13 #define __NET_H__
  14
  15 #include <linux/types.h>
  16 #include <asm/cache.h>
  17 #include <asm/byteorder.h>      /* for nton* / ntoh* stuff */
  18 #include <env.h>
  19 #include <log.h>
  20 #include <time.h>
  21 #include <linux/if_ether.h>
  22 #include <rand.h>
  23
  24 struct bd_info;
  25 struct cmd_tbl_s;
  26 struct udevice;
  27
  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 */
  32
  33 /*
  34  *      The number of receive packet buffers, and the required packet buffer
  35  *      alignment in memory.
  36  *
  37  */
  38
  39 #ifdef CONFIG_SYS_RX_ETH_BUFFER
  40 # define PKTBUFSRX      CONFIG_SYS_RX_ETH_BUFFER
  41 #else
  42 # define PKTBUFSRX      4
  43 #endif
  44
  45 #define PKTALIGN        ARCH_DMA_MINALIGN
  46
  47 /* ARP hardware address length */
  48 #define ARP_HLEN 6
  49 /*
  50  * The size of a MAC address in string form, each digit requires two chars
  51  * and five separator characters to form '00:00:00:00:00:00'.
  52  */
  53 #define ARP_HLEN_ASCII (ARP_HLEN * 2) + (ARP_HLEN - 1)
  54
  55 /* IPv4 addresses are always 32 bits in size */
  56 struct in_addr {
  57         __be32 s_addr;
  58 };
  59
  60 /**
  61  * do_tftpb - Run the tftpboot command
  62  *
  63  * @cmdtp: Command information for tftpboot
  64  * @flag: Command flags (CMD_FLAG_...)
  65  * @argc: Number of arguments
  66  * @argv: List of arguments
  67  * @return result (see enum command_ret_t)
  68  */
  69 int do_tftpb(struct cmd_tbl_s *cmdtp, int flag, int argc, char *const argv[]);
  70
  71 /**
  72  * An incoming packet handler.
  73  * @param pkt    pointer to the application packet
  74  * @param dport  destination UDP port
  75  * @param sip    source IP address
  76  * @param sport  source UDP port
  77  * @param len    packet length
  78  */
  79 typedef void rxhand_f(uchar *pkt, unsigned dport,
  80                       struct in_addr sip, unsigned sport,
  81                       unsigned len);
  82
  83 /**
  84  * An incoming ICMP packet handler.
  85  * @param type  ICMP type
  86  * @param code  ICMP code
  87  * @param dport destination UDP port
  88  * @param sip   source IP address
  89  * @param sport source UDP port
  90  * @param pkt   pointer to the ICMP packet data
  91  * @param len   packet length
  92  */
  93 typedef void rxhand_icmp_f(unsigned type, unsigned code, unsigned dport,
  94                 struct in_addr sip, unsigned sport, uchar *pkt, unsigned len);
  95
  96 /*
  97  *      A timeout handler.  Called after time interval has expired.
  98  */
  99 typedef void    thand_f(void);
 100
 101 enum eth_state_t {
 102         ETH_STATE_INIT,
 103         ETH_STATE_PASSIVE,
 104         ETH_STATE_ACTIVE
 105 };
 106
 107 #ifdef CONFIG_DM_ETH
 108 /**
 109  * struct eth_pdata - Platform data for Ethernet MAC controllers
 110  *
 111  * @iobase: The base address of the hardware registers
 112  * @enetaddr: The Ethernet MAC address that is loaded from EEPROM or env
 113  * @phy_interface: PHY interface to use - see PHY_INTERFACE_MODE_...
 114  * @max_speed: Maximum speed of Ethernet connection supported by MAC
 115  * @priv_pdata: device specific platdata
 116  */
 117 struct eth_pdata {
 118         phys_addr_t iobase;
 119         unsigned char enetaddr[ARP_HLEN];
 120         int phy_interface;
 121         int max_speed;
 122         void *priv_pdata;
 123 };
 124
 125 enum eth_recv_flags {
 126         /*
 127          * Check hardware device for new packets (otherwise only return those
 128          * which are already in the memory buffer ready to process)
 129          */
 130         ETH_RECV_CHECK_DEVICE           = 1 << 0,
 131 };
 132
 133 /**
 134  * struct eth_ops - functions of Ethernet MAC controllers
 135  *
 136  * start: Prepare the hardware to send and receive packets
 137  * send: Send the bytes passed in "packet" as a packet on the wire
 138  * recv: Check if the hardware received a packet. If so, set the pointer to the
 139  *       packet buffer in the packetp parameter. If not, return an error or 0 to
 140  *       indicate that the hardware receive FIFO is empty. If 0 is returned, the
 141  *       network stack will not process the empty packet, but free_pkt() will be
 142  *       called if supplied
 143  * free_pkt: Give the driver an opportunity to manage its packet buffer memory
 144  *           when the network stack is finished processing it. This will only be
 145  *           called when no error was returned from recv - optional
 146  * stop: Stop the hardware from looking for packets - may be called even if
 147  *       state == PASSIVE
 148  * mcast: Join or leave a multicast group (for TFTP) - optional
 149  * write_hwaddr: Write a MAC address to the hardware (used to pass it to Linux
 150  *               on some platforms like ARM). This function expects the
 151  *               eth_pdata::enetaddr field to be populated. The method can
 152  *               return -ENOSYS to indicate that this is not implemented for
 153                  this hardware - optional.
 154  * read_rom_hwaddr: Some devices have a backup of the MAC address stored in a
 155  *                  ROM on the board. This is how the driver should expose it
 156  *                  to the network stack. This function should fill in the
 157  *                  eth_pdata::enetaddr field - optional
 158  */
 159 struct eth_ops {
 160         int (*start)(struct udevice *dev);
 161         int (*send)(struct udevice *dev, void *packet, int length);
 162         int (*recv)(struct udevice *dev, int flags, uchar **packetp);
 163         int (*free_pkt)(struct udevice *dev, uchar *packet, int length);
 164         void (*stop)(struct udevice *dev);
 165         int (*mcast)(struct udevice *dev, const u8 *enetaddr, int join);
 166         int (*write_hwaddr)(struct udevice *dev);
 167         int (*read_rom_hwaddr)(struct udevice *dev);
 168 };
 169
 170 #define eth_get_ops(dev) ((struct eth_ops *)(dev)->driver->ops)
 171
 172 struct udevice *eth_get_dev(void); /* get the current device */
 173 /*
 174  * The devname can be either an exact name given by the driver or device tree
 175  * or it can be an alias of the form "eth%d"
 176  */
 177 struct udevice *eth_get_dev_by_name(const char *devname);
 178 unsigned char *eth_get_ethaddr(void); /* get the current device MAC */
 179
 180 /* Used only when NetConsole is enabled */
 181 int eth_is_active(struct udevice *dev); /* Test device for active state */
 182 int eth_init_state_only(void); /* Set active state */
 183 void eth_halt_state_only(void); /* Set passive state */
 184 #endif
 185
 186 #ifndef CONFIG_DM_ETH
 187 struct eth_device {
 188 #define ETH_NAME_LEN 20
 189         char name[ETH_NAME_LEN];
 190         unsigned char enetaddr[ARP_HLEN];
 191         phys_addr_t iobase;
 192         int state;
 193
 194         int (*init)(struct eth_device *eth, struct bd_info *bd);
 195         int (*send)(struct eth_device *, void *packet, int length);
 196         int (*recv)(struct eth_device *);
 197         void (*halt)(struct eth_device *);
 198         int (*mcast)(struct eth_device *, const u8 *enetaddr, int join);
 199         int (*write_hwaddr)(struct eth_device *eth);
 200         struct eth_device *next;
 201         int index;
 202         void *priv;
 203 };
 204
 205 int eth_register(struct eth_device *dev);/* Register network device */
 206 int eth_unregister(struct eth_device *dev);/* Remove network device */
 207
 208 extern struct eth_device *eth_current;
 209
 210 static __always_inline struct eth_device *eth_get_dev(void)
 211 {
 212         return eth_current;
 213 }
 214 struct eth_device *eth_get_dev_by_name(const char *devname);
 215 struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */
 216
 217 /* get the current device MAC */
 218 static inline unsigned char *eth_get_ethaddr(void)
 219 {
 220         if (eth_current)
 221                 return eth_current->enetaddr;
 222         return NULL;
 223 }
 224
 225 /* Used only when NetConsole is enabled */
 226 int eth_is_active(struct eth_device *dev); /* Test device for active state */
 227 /* Set active state */
 228 static __always_inline int eth_init_state_only(void)
 229 {
 230         eth_get_dev()->state = ETH_STATE_ACTIVE;
 231
 232         return 0;
 233 }
 234 /* Set passive state */
 235 static __always_inline void eth_halt_state_only(void)
 236 {
 237         eth_get_dev()->state = ETH_STATE_PASSIVE;
 238 }
 239
 240 /*
 241  * Set the hardware address for an ethernet interface based on 'eth%daddr'
 242  * environment variable (or just 'ethaddr' if eth_number is 0).
 243  * Args:
 244  *      base_name - base name for device (normally "eth")
 245  *      eth_number - value of %d (0 for first device of this type)
 246  * Returns:
 247  *      0 is success, non-zero is error status from driver.
 248  */
 249 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
 250                      int eth_number);
 251
 252 int usb_eth_initialize(struct bd_info *bi);
 253 #endif
 254
 255 int eth_initialize(void);               /* Initialize network subsystem */
 256 void eth_try_another(int first_restart);        /* Change the device */
 257 void eth_set_current(void);             /* set nterface to ethcur var */
 258
 259 int eth_get_dev_index(void);            /* get the device index */
 260
 261 /**
 262  * eth_env_set_enetaddr_by_index() - set the MAC address environment variable
 263  *
 264  * This sets up an environment variable with the given MAC address (@enetaddr).
 265  * The environment variable to be set is defined by <@base_name><@index>addr.
 266  * If @index is 0 it is omitted. For common Ethernet this means ethaddr,
 267  * eth1addr, etc.
 268  *
 269  * @base_name:  Base name for variable, typically "eth"
 270  * @index:      Index of interface being updated (>=0)
 271  * @enetaddr:   Pointer to MAC address to put into the variable
 272  * @return 0 if OK, other value on error
 273  */
 274 int eth_env_set_enetaddr_by_index(const char *base_name, int index,
 275                                  uchar *enetaddr);
 276
 277
 278 /*
 279  * Initialize USB ethernet device with CONFIG_DM_ETH
 280  * Returns:
 281  *      0 is success, non-zero is error status.
 282  */
 283 int usb_ether_init(void);
 284
 285 /*
 286  * Get the hardware address for an ethernet interface .
 287  * Args:
 288  *      base_name - base name for device (normally "eth")
 289  *      index - device index number (0 for first)
 290  *      enetaddr - returns 6 byte hardware address
 291  * Returns:
 292  *      Return true if the address is valid.
 293  */
 294 int eth_env_get_enetaddr_by_index(const char *base_name, int index,
 295                                  uchar *enetaddr);
 296
 297 int eth_init(void);                     /* Initialize the device */
 298 int eth_send(void *packet, int length);    /* Send a packet */
 299
 300 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
 301 int eth_receive(void *packet, int length); /* Receive a packet*/
 302 extern void (*push_packet)(void *packet, int length);
 303 #endif
 304 int eth_rx(void);                       /* Check for received packets */
 305 void eth_halt(void);                    /* stop SCC */
 306 const char *eth_get_name(void);         /* get name of current device */
 307 int eth_mcast_join(struct in_addr mcast_addr, int join);
 308
 309 /**********************************************************************/
 310 /*
 311  *      Protocol headers.
 312  */
 313
 314 /*
 315  *      Ethernet header
 316  */
 317
 318 struct ethernet_hdr {
 319         u8              et_dest[ARP_HLEN];      /* Destination node     */
 320         u8              et_src[ARP_HLEN];       /* Source node          */
 321         u16             et_protlen;             /* Protocol or length   */
 322 } __attribute__((packed));
 323
 324 /* Ethernet header size */
 325 #define ETHER_HDR_SIZE  (sizeof(struct ethernet_hdr))
 326
 327 #define ETH_FCS_LEN     4               /* Octets in the FCS            */
 328
 329 struct e802_hdr {
 330         u8              et_dest[ARP_HLEN];      /* Destination node     */
 331         u8              et_src[ARP_HLEN];       /* Source node          */
 332         u16             et_protlen;             /* Protocol or length   */
 333         u8              et_dsap;                /* 802 DSAP             */
 334         u8              et_ssap;                /* 802 SSAP             */
 335         u8              et_ctl;                 /* 802 control          */
 336         u8              et_snap1;               /* SNAP                 */
 337         u8              et_snap2;
 338         u8              et_snap3;
 339         u16             et_prot;                /* 802 protocol         */
 340 } __attribute__((packed));
 341
 342 /* 802 + SNAP + ethernet header size */
 343 #define E802_HDR_SIZE   (sizeof(struct e802_hdr))
 344
 345 /*
 346  *      Virtual LAN Ethernet header
 347  */
 348 struct vlan_ethernet_hdr {
 349         u8              vet_dest[ARP_HLEN];     /* Destination node     */
 350         u8              vet_src[ARP_HLEN];      /* Source node          */
 351         u16             vet_vlan_type;          /* PROT_VLAN            */
 352         u16             vet_tag;                /* TAG of VLAN          */
 353         u16             vet_type;               /* protocol type        */
 354 } __attribute__((packed));
 355
 356 /* VLAN Ethernet header size */
 357 #define VLAN_ETHER_HDR_SIZE     (sizeof(struct vlan_ethernet_hdr))
 358
 359 #define PROT_IP         0x0800          /* IP protocol                  */
 360 #define PROT_ARP        0x0806          /* IP ARP protocol              */
 361 #define PROT_WOL        0x0842          /* ether-wake WoL protocol      */
 362 #define PROT_RARP       0x8035          /* IP ARP protocol              */
 363 #define PROT_VLAN       0x8100          /* IEEE 802.1q protocol         */
 364 #define PROT_IPV6       0x86dd          /* IPv6 over bluebook           */
 365 #define PROT_PPP_SES    0x8864          /* PPPoE session messages       */
 366 #define PROT_NCSI       0x88f8          /* NC-SI control packets        */
 367
 368 #define IPPROTO_ICMP     1      /* Internet Control Message Protocol    */
 369 #define IPPROTO_UDP     17      /* User Datagram Protocol               */
 370
 371 /*
 372  *      Internet Protocol (IP) header.
 373  */
 374 struct ip_hdr {
 375         u8              ip_hl_v;        /* header length and version    */
 376         u8              ip_tos;         /* type of service              */
 377         u16             ip_len;         /* total length                 */
 378         u16             ip_id;          /* identification               */
 379         u16             ip_off;         /* fragment offset field        */
 380         u8              ip_ttl;         /* time to live                 */
 381         u8              ip_p;           /* protocol                     */
 382         u16             ip_sum;         /* checksum                     */
 383         struct in_addr  ip_src;         /* Source IP address            */
 384         struct in_addr  ip_dst;         /* Destination IP address       */
 385 } __attribute__((packed));
 386
 387 #define IP_OFFS         0x1fff /* ip offset *= 8 */
 388 #define IP_FLAGS        0xe000 /* first 3 bits */
 389 #define IP_FLAGS_RES    0x8000 /* reserved */
 390 #define IP_FLAGS_DFRAG  0x4000 /* don't fragments */
 391 #define IP_FLAGS_MFRAG  0x2000 /* more fragments */
 392
 393 #define IP_HDR_SIZE             (sizeof(struct ip_hdr))
 394
 395 /*
 396  *      Internet Protocol (IP) + UDP header.
 397  */
 398 struct ip_udp_hdr {
 399         u8              ip_hl_v;        /* header length and version    */
 400         u8              ip_tos;         /* type of service              */
 401         u16             ip_len;         /* total length                 */
 402         u16             ip_id;          /* identification               */
 403         u16             ip_off;         /* fragment offset field        */
 404         u8              ip_ttl;         /* time to live                 */
 405         u8              ip_p;           /* protocol                     */
 406         u16             ip_sum;         /* checksum                     */
 407         struct in_addr  ip_src;         /* Source IP address            */
 408         struct in_addr  ip_dst;         /* Destination IP address       */
 409         u16             udp_src;        /* UDP source port              */
 410         u16             udp_dst;        /* UDP destination port         */
 411         u16             udp_len;        /* Length of UDP packet         */
 412         u16             udp_xsum;       /* Checksum                     */
 413 } __attribute__((packed));
 414
 415 #define IP_UDP_HDR_SIZE         (sizeof(struct ip_udp_hdr))
 416 #define UDP_HDR_SIZE            (IP_UDP_HDR_SIZE - IP_HDR_SIZE)
 417
 418 /*
 419  *      Address Resolution Protocol (ARP) header.
 420  */
 421 struct arp_hdr {
 422         u16             ar_hrd;         /* Format of hardware address   */
 423 #   define ARP_ETHER        1           /* Ethernet  hardware address   */
 424         u16             ar_pro;         /* Format of protocol address   */
 425         u8              ar_hln;         /* Length of hardware address   */
 426         u8              ar_pln;         /* Length of protocol address   */
 427 #   define ARP_PLEN     4
 428         u16             ar_op;          /* Operation                    */
 429 #   define ARPOP_REQUEST    1           /* Request  to resolve  address */
 430 #   define ARPOP_REPLY      2           /* Response to previous request */
 431
 432 #   define RARPOP_REQUEST   3           /* Request  to resolve  address */
 433 #   define RARPOP_REPLY     4           /* Response to previous request */
 434
 435         /*
 436          * The remaining fields are variable in size, according to
 437          * the sizes above, and are defined as appropriate for
 438          * specific hardware/protocol combinations.
 439          */
 440         u8              ar_data[0];
 441 #define ar_sha          ar_data[0]
 442 #define ar_spa          ar_data[ARP_HLEN]
 443 #define ar_tha          ar_data[ARP_HLEN + ARP_PLEN]
 444 #define ar_tpa          ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN]
 445 #if 0
 446         u8              ar_sha[];       /* Sender hardware address      */
 447         u8              ar_spa[];       /* Sender protocol address      */
 448         u8              ar_tha[];       /* Target hardware address      */
 449         u8              ar_tpa[];       /* Target protocol address      */
 450 #endif /* 0 */
 451 } __attribute__((packed));
 452
 453 #define ARP_HDR_SIZE    (8+20)          /* Size assuming ethernet       */
 454
 455 /*
 456  * ICMP stuff (just enough to handle (host) redirect messages)
 457  */
 458 #define ICMP_ECHO_REPLY         0       /* Echo reply                   */
 459 #define ICMP_NOT_REACH          3       /* Detination unreachable       */
 460 #define ICMP_REDIRECT           5       /* Redirect (change route)      */
 461 #define ICMP_ECHO_REQUEST       8       /* Echo request                 */
 462
 463 /* Codes for REDIRECT. */
 464 #define ICMP_REDIR_NET          0       /* Redirect Net                 */
 465 #define ICMP_REDIR_HOST         1       /* Redirect Host                */
 466
 467 /* Codes for NOT_REACH */
 468 #define ICMP_NOT_REACH_PORT     3       /* Port unreachable             */
 469
 470 struct icmp_hdr {
 471         u8              type;
 472         u8              code;
 473         u16             checksum;
 474         union {
 475                 struct {
 476                         u16     id;
 477                         u16     sequence;
 478                 } echo;
 479                 u32     gateway;
 480                 struct {
 481                         u16     unused;
 482                         u16     mtu;
 483                 } frag;
 484                 u8 data[0];
 485         } un;
 486 } __attribute__((packed));
 487
 488 #define ICMP_HDR_SIZE           (sizeof(struct icmp_hdr))
 489 #define IP_ICMP_HDR_SIZE        (IP_HDR_SIZE + ICMP_HDR_SIZE)
 490
 491 /*
 492  * Maximum packet size; used to allocate packet storage. Use
 493  * the maxium Ethernet frame size as specified by the Ethernet
 494  * standard including the 802.1Q tag (VLAN tagging).
 495  * maximum packet size =  1522
 496  * maximum packet size and multiple of 32 bytes =  1536
 497  */
 498 #define PKTSIZE                 1522
 499 #define PKTSIZE_ALIGN           1536
 500
 501 /*
 502  * Maximum receive ring size; that is, the number of packets
 503  * we can buffer before overflow happens. Basically, this just
 504  * needs to be enough to prevent a packet being discarded while
 505  * we are processing the previous one.
 506  */
 507 #define RINGSZ          4
 508 #define RINGSZ_LOG2     2
 509
 510 /**********************************************************************/
 511 /*
 512  *      Globals.
 513  *
 514  * Note:
 515  *
 516  * All variables of type struct in_addr are stored in NETWORK byte order
 517  * (big endian).
 518  */
 519
 520 /* net.c */
 521 /** BOOTP EXTENTIONS **/
 522 extern struct in_addr net_gateway;      /* Our gateway IP address */
 523 extern struct in_addr net_netmask;      /* Our subnet mask (0 = unknown) */
 524 /* Our Domain Name Server (0 = unknown) */
 525 extern struct in_addr net_dns_server;
 526 #if defined(CONFIG_BOOTP_DNS2)
 527 /* Our 2nd Domain Name Server (0 = unknown) */
 528 extern struct in_addr net_dns_server2;
 529 #endif
 530 extern char     net_nis_domain[32];     /* Our IS domain */
 531 extern char     net_hostname[32];       /* Our hostname */
 532 extern char     net_root_path[64];      /* Our root path */
 533 /** END OF BOOTP EXTENTIONS **/
 534 extern u8               net_ethaddr[ARP_HLEN];          /* Our ethernet address */
 535 extern u8               net_server_ethaddr[ARP_HLEN];   /* Boot server enet address */
 536 extern struct in_addr   net_ip;         /* Our    IP addr (0 = unknown) */
 537 extern struct in_addr   net_server_ip;  /* Server IP addr (0 = unknown) */
 538 extern uchar            *net_tx_packet;         /* THE transmit packet */
 539 extern uchar            *net_rx_packets[PKTBUFSRX]; /* Receive packets */
 540 extern uchar            *net_rx_packet;         /* Current receive packet */
 541 extern int              net_rx_packet_len;      /* Current rx packet length */
 542 extern const u8         net_bcast_ethaddr[ARP_HLEN];    /* Ethernet broadcast address */
 543 extern const u8         net_null_ethaddr[ARP_HLEN];
 544
 545 #define VLAN_NONE       4095                    /* untagged */
 546 #define VLAN_IDMASK     0x0fff                  /* mask of valid vlan id */
 547 extern ushort           net_our_vlan;           /* Our VLAN */
 548 extern ushort           net_native_vlan;        /* Our Native VLAN */
 549
 550 extern int              net_restart_wrap;       /* Tried all network devices */
 551
 552 enum proto_t {
 553         BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
 554         TFTPSRV, TFTPPUT, LINKLOCAL, FASTBOOT, WOL
 555 };
 556
 557 extern char     net_boot_file_name[1024];/* Boot File name */
 558 /* Indicates whether the file name was specified on the command line */
 559 extern bool     net_boot_file_name_explicit;
 560 /* The actual transferred size of the bootfile (in bytes) */
 561 extern u32      net_boot_file_size;
 562 /* Boot file size in blocks as reported by the DHCP server */
 563 extern u32      net_boot_file_expected_size_in_blocks;
 564
 565 #if defined(CONFIG_CMD_DNS)
 566 extern char *net_dns_resolve;           /* The host to resolve  */
 567 extern char *net_dns_env_var;           /* the env var to put the ip into */
 568 #endif
 569
 570 #if defined(CONFIG_CMD_PING)
 571 extern struct in_addr net_ping_ip;      /* the ip address to ping */
 572 #endif
 573
 574 #if defined(CONFIG_CMD_CDP)
 575 /* when CDP completes these hold the return values */
 576 extern ushort cdp_native_vlan;          /* CDP returned native VLAN */
 577 extern ushort cdp_appliance_vlan;       /* CDP returned appliance VLAN */
 578
 579 /*
 580  * Check for a CDP packet by examining the received MAC address field
 581  */
 582 static inline int is_cdp_packet(const uchar *ethaddr)
 583 {
 584         extern const u8 net_cdp_ethaddr[ARP_HLEN];
 585
 586         return memcmp(ethaddr, net_cdp_ethaddr, ARP_HLEN) == 0;
 587 }
 588 #endif
 589
 590 #if defined(CONFIG_CMD_SNTP)
 591 extern struct in_addr   net_ntp_server;         /* the ip address to NTP */
 592 extern int net_ntp_time_offset;                 /* offset time from UTC */
 593 #endif
 594
 595 /* Initialize the network adapter */
 596 void net_init(void);
 597 int net_loop(enum proto_t);
 598
 599 /* Load failed.  Start again. */
 600 int net_start_again(void);
 601
 602 /* Get size of the ethernet header when we send */
 603 int net_eth_hdr_size(void);
 604
 605 /* Set ethernet header; returns the size of the header */
 606 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot);
 607 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot);
 608
 609 /* Set IP header */
 610 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source,
 611                        u16 pkt_len, u8 proto);
 612 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport,
 613                                 int sport, int len);
 614
 615 /**
 616  * compute_ip_checksum() - Compute IP checksum
 617  *
 618  * @addr:       Address to check (must be 16-bit aligned)
 619  * @nbytes:     Number of bytes to check (normally a multiple of 2)
 620  * @return 16-bit IP checksum
 621  */
 622 unsigned compute_ip_checksum(const void *addr, unsigned nbytes);
 623
 624 /**
 625  * add_ip_checksums() - add two IP checksums
 626  *
 627  * @offset:     Offset of first sum (if odd we do a byte-swap)
 628  * @sum:        First checksum
 629  * @new_sum:    New checksum to add
 630  * @return updated 16-bit IP checksum
 631  */
 632 unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum);
 633
 634 /**
 635  * ip_checksum_ok() - check if a checksum is correct
 636  *
 637  * This works by making sure the checksum sums to 0
 638  *
 639  * @addr:       Address to check (must be 16-bit aligned)
 640  * @nbytes:     Number of bytes to check (normally a multiple of 2)
 641  * @return true if the checksum matches, false if not
 642  */
 643 int ip_checksum_ok(const void *addr, unsigned nbytes);
 644
 645 /* Callbacks */
 646 rxhand_f *net_get_udp_handler(void);    /* Get UDP RX packet handler */
 647 void net_set_udp_handler(rxhand_f *);   /* Set UDP RX packet handler */
 648 rxhand_f *net_get_arp_handler(void);    /* Get ARP RX packet handler */
 649 void net_set_arp_handler(rxhand_f *);   /* Set ARP RX packet handler */
 650 bool arp_is_waiting(void);              /* Waiting for ARP reply? */
 651 void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
 652 void net_set_timeout_handler(ulong, thand_f *);/* Set timeout handler */
 653
 654 /* Network loop state */
 655 enum net_loop_state {
 656         NETLOOP_CONTINUE,
 657         NETLOOP_RESTART,
 658         NETLOOP_SUCCESS,
 659         NETLOOP_FAIL
 660 };
 661 extern enum net_loop_state net_state;
 662
 663 static inline void net_set_state(enum net_loop_state state)
 664 {
 665         debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state);
 666         net_state = state;
 667 }
 668
 669 /*
 670  * net_get_async_tx_pkt_buf - Get a packet buffer that is not in use for
 671  *                            sending an asynchronous reply
 672  *
 673  * returns - ptr to packet buffer
 674  */
 675 uchar * net_get_async_tx_pkt_buf(void);
 676
 677 /* Transmit a packet */
 678 static inline void net_send_packet(uchar *pkt, int len)
 679 {
 680         /* Currently no way to return errors from eth_send() */
 681         (void) eth_send(pkt, len);
 682 }
 683
 684 /*
 685  * Transmit "net_tx_packet" as UDP packet, performing ARP request if needed
 686  *  (ether will be populated)
 687  *
 688  * @param ether Raw packet buffer
 689  * @param dest IP address to send the datagram to
 690  * @param dport Destination UDP port
 691  * @param sport Source UDP port
 692  * @param payload_len Length of data after the UDP header
 693  */
 694 int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport,
 695                        int payload_len, int proto, u8 action, u32 tcp_seq_num,
 696                        u32 tcp_ack_num);
 697 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport,
 698                         int sport, int payload_len);
 699
 700 /* Processes a received packet */
 701 void net_process_received_packet(uchar *in_packet, int len);
 702
 703 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
 704 void nc_start(void);
 705 int nc_input_packet(uchar *pkt, struct in_addr src_ip, unsigned dest_port,
 706         unsigned src_port, unsigned len);
 707 #endif
 708
 709 static __always_inline int eth_is_on_demand_init(void)
 710 {
 711 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
 712         extern enum proto_t net_loop_last_protocol;
 713
 714         return net_loop_last_protocol != NETCONS;
 715 #else
 716         return 1;
 717 #endif
 718 }
 719
 720 static inline void eth_set_last_protocol(int protocol)
 721 {
 722 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
 723         extern enum proto_t net_loop_last_protocol;
 724
 725         net_loop_last_protocol = protocol;
 726 #endif
 727 }
 728
 729 /*
 730  * Check if autoload is enabled. If so, use either NFS or TFTP to download
 731  * the boot file.
 732  */
 733 void net_auto_load(void);
 734
 735 /*
 736  * The following functions are a bit ugly, but necessary to deal with
 737  * alignment restrictions on ARM.
 738  *
 739  * We're using inline functions, which had the smallest memory
 740  * footprint in our tests.
 741  */
 742 /* return IP *in network byteorder* */
 743 static inline struct in_addr net_read_ip(void *from)
 744 {
 745         struct in_addr ip;
 746
 747         memcpy((void *)&ip, (void *)from, sizeof(ip));
 748         return ip;
 749 }
 750
 751 /* return ulong *in network byteorder* */
 752 static inline u32 net_read_u32(void *from)
 753 {
 754         u32 l;
 755
 756         memcpy((void *)&l, (void *)from, sizeof(l));
 757         return l;
 758 }
 759
 760 /* write IP *in network byteorder* */
 761 static inline void net_write_ip(void *to, struct in_addr ip)
 762 {
 763         memcpy(to, (void *)&ip, sizeof(ip));
 764 }
 765
 766 /* copy IP */
 767 static inline void net_copy_ip(void *to, void *from)
 768 {
 769         memcpy((void *)to, from, sizeof(struct in_addr));
 770 }
 771
 772 /* copy ulong */
 773 static inline void net_copy_u32(void *to, void *from)
 774 {
 775         memcpy((void *)to, (void *)from, sizeof(u32));
 776 }
 777
 778 /**
 779  * is_zero_ethaddr - Determine if give Ethernet address is all zeros.
 780  * @addr: Pointer to a six-byte array containing the Ethernet address
 781  *
 782  * Return true if the address is all zeroes.
 783  */
 784 static inline int is_zero_ethaddr(const u8 *addr)
 785 {
 786         return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
 787 }
 788
 789 /**
 790  * is_multicast_ethaddr - Determine if the Ethernet address is a multicast.
 791  * @addr: Pointer to a six-byte array containing the Ethernet address
 792  *
 793  * Return true if the address is a multicast address.
 794  * By definition the broadcast address is also a multicast address.
 795  */
 796 static inline int is_multicast_ethaddr(const u8 *addr)
 797 {
 798         return 0x01 & addr[0];
 799 }
 800
 801 /*
 802  * is_broadcast_ethaddr - Determine if the Ethernet address is broadcast
 803  * @addr: Pointer to a six-byte array containing the Ethernet address
 804  *
 805  * Return true if the address is the broadcast address.
 806  */
 807 static inline int is_broadcast_ethaddr(const u8 *addr)
 808 {
 809         return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) ==
 810                 0xff;
 811 }
 812
 813 /*
 814  * is_valid_ethaddr - Determine if the given Ethernet address is valid
 815  * @addr: Pointer to a six-byte array containing the Ethernet address
 816  *
 817  * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
 818  * a multicast address, and is not FF:FF:FF:FF:FF:FF.
 819  *
 820  * Return true if the address is valid.
 821  */
 822 static inline int is_valid_ethaddr(const u8 *addr)
 823 {
 824         /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
 825          * explicitly check for it here. */
 826         return !is_multicast_ethaddr(addr) && !is_zero_ethaddr(addr);
 827 }
 828
 829 /**
 830  * net_random_ethaddr - Generate software assigned random Ethernet address
 831  * @addr: Pointer to a six-byte array containing the Ethernet address
 832  *
 833  * Generate a random Ethernet address (MAC) that is not multicast
 834  * and has the local assigned bit set.
 835  */
 836 static inline void net_random_ethaddr(uchar *addr)
 837 {
 838         int i;
 839         unsigned int seed = get_ticks();
 840
 841         for (i = 0; i < 6; i++)
 842                 addr[i] = rand_r(&seed);
 843
 844         addr[0] &= 0xfe;        /* clear multicast bit */
 845         addr[0] |= 0x02;        /* set local assignment bit (IEEE802) */
 846 }
 847
 848 /**
 849  * string_to_enetaddr() - Parse a MAC address
 850  *
 851  * Convert a string MAC address
 852  *
 853  * Implemented in lib/net_utils.c (built unconditionally)
 854  *
 855  * @addr: MAC address in aa:bb:cc:dd:ee:ff format, where each part is a 2-digit
 856  *      hex value
 857  * @enetaddr: Place to put MAC address (6 bytes)
 858  */
 859 void string_to_enetaddr(const char *addr, uint8_t *enetaddr);
 860
 861 /* Convert an IP address to a string */
 862 void ip_to_string(struct in_addr x, char *s);
 863
 864 /**
 865  * string_to_ip() - Convert a string to ip address
 866  *
 867  * Implemented in lib/net_utils.c (built unconditionally)
 868  *
 869  * @s: Input string to parse
 870  * @return: in_addr struct containing the parsed IP address
 871  */
 872 struct in_addr string_to_ip(const char *s);
 873
 874 /* Convert a VLAN id to a string */
 875 void vlan_to_string(ushort x, char *s);
 876
 877 /* Convert a string to a vlan id */
 878 ushort string_to_vlan(const char *s);
 879
 880 /* read a VLAN id from an environment variable */
 881 ushort env_get_vlan(char *);
 882
 883 /* copy a filename (allow for "..." notation, limit length) */
 884 void copy_filename(char *dst, const char *src, int size);
 885
 886 /* check if serverip is specified in filename from the command line */
 887 int is_serverip_in_cmd(void);
 888
 889 /**
 890  * net_parse_bootfile - Parse the bootfile env var / cmd line param
 891  *
 892  * @param ipaddr - a pointer to the ipaddr to populate if included in bootfile
 893  * @param filename - a pointer to the string to save the filename part
 894  * @param max_len - The longest - 1 that the filename part can be
 895  *
 896  * return 1 if parsed, 0 if bootfile is empty
 897  */
 898 int net_parse_bootfile(struct in_addr *ipaddr, char *filename, int max_len);
 899
 900 /* get a random source port */
 901 unsigned int random_port(void);
 902
 903 /**
 904  * update_tftp - Update firmware over TFTP (via DFU)
 905  *
 906  * This function updates board's firmware via TFTP
 907  *
 908  * @param addr - memory address where data is stored
 909  * @param interface - the DFU medium name - e.g. "mmc"
 910  * @param devstring - the DFU medium number - e.g. "1"
 911  *
 912  * @return - 0 on success, other value on failure
 913  */
 914 int update_tftp(ulong addr, char *interface, char *devstring);
 915
 916 /**
 917  * env_get_ip() - Convert an environment value to to an ip address
 918  *
 919  * @var: Environment variable to convert. The value of this variable must be
 920  *      in the format format a.b.c.d, where each value is a decimal number from
 921  *      0 to 255
 922  * @return IP address, or 0 if invalid
 923  */
 924 static inline struct in_addr env_get_ip(char *var)
 925 {
 926         return string_to_ip(env_get(var));
 927 }
 928
 929 /**
 930  * reset_phy() - Reset the Ethernet PHY
 931  *
 932  * This should be implemented by boards if CONFIG_RESET_PHY_R is enabled
 933  */
 934 void reset_phy(void);
 935
 936 #endif /* __NET_H__ */