include/net.h

   1 /*
   2  *      LiMon Monitor (LiMon) - Network.
   3  *
   4  *      Copyright 1994 - 2000 Neil Russell.
   5  *      (See License)
   6  *
   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 #if defined(CONFIG_8xx)
  16 #include <commproc.h>
  17 #endif  /* CONFIG_8xx */
  18
  19 #include <asm/cache.h>
  20 #include <asm/byteorder.h>      /* for nton* / ntoh* stuff */
  21
  22 #define DEBUG_LL_STATE 0        /* Link local state machine changes */
  23 #define DEBUG_DEV_PKT 0         /* Packets or info directed to the device */
  24 #define DEBUG_NET_PKT 0         /* Packets on info on the network at large */
  25 #define DEBUG_INT_STATE 0       /* Internal network state changes */
  26
  27 /*
  28  *      The number of receive packet buffers, and the required packet buffer
  29  *      alignment in memory.
  30  *
  31  */
  32
  33 #ifdef CONFIG_SYS_RX_ETH_BUFFER
  34 # define PKTBUFSRX      CONFIG_SYS_RX_ETH_BUFFER
  35 #else
  36 # define PKTBUFSRX      4
  37 #endif
  38
  39 #define PKTALIGN        ARCH_DMA_MINALIGN
  40
  41 /* IPv4 addresses are always 32 bits in size */
  42 typedef __be32          IPaddr_t;
  43
  44
  45 /**
  46  * An incoming packet handler.
  47  * @param pkt    pointer to the application packet
  48  * @param dport  destination UDP port
  49  * @param sip    source IP address
  50  * @param sport  source UDP port
  51  * @param len    packet length
  52  */
  53 typedef void rxhand_f(uchar *pkt, unsigned dport,
  54                       IPaddr_t sip, unsigned sport,
  55                       unsigned len);
  56
  57 /**
  58  * An incoming ICMP packet handler.
  59  * @param type  ICMP type
  60  * @param code  ICMP code
  61  * @param dport destination UDP port
  62  * @param sip   source IP address
  63  * @param sport source UDP port
  64  * @param pkt   pointer to the ICMP packet data
  65  * @param len   packet length
  66  */
  67 typedef void rxhand_icmp_f(unsigned type, unsigned code, unsigned dport,
  68                 IPaddr_t sip, unsigned sport, uchar *pkt, unsigned len);
  69
  70 /*
  71  *      A timeout handler.  Called after time interval has expired.
  72  */
  73 typedef void    thand_f(void);
  74
  75 enum eth_state_t {
  76         ETH_STATE_INIT,
  77         ETH_STATE_PASSIVE,
  78         ETH_STATE_ACTIVE
  79 };
  80
  81 struct eth_device {
  82         char name[16];
  83         unsigned char enetaddr[6];
  84         int iobase;
  85         int state;
  86
  87         int  (*init) (struct eth_device *, bd_t *);
  88         int  (*send) (struct eth_device *, void *packet, int length);
  89         int  (*recv) (struct eth_device *);
  90         void (*halt) (struct eth_device *);
  91 #ifdef CONFIG_MCAST_TFTP
  92         int (*mcast) (struct eth_device *, const u8 *enetaddr, u8 set);
  93 #endif
  94         int  (*write_hwaddr) (struct eth_device *);
  95         struct eth_device *next;
  96         int index;
  97         void *priv;
  98 };
  99
 100 extern int eth_initialize(bd_t *bis);   /* Initialize network subsystem */
 101 extern int eth_register(struct eth_device* dev);/* Register network device */
 102 extern int eth_unregister(struct eth_device *dev);/* Remove network device */
 103 extern void eth_try_another(int first_restart); /* Change the device */
 104 extern void eth_set_current(void);              /* set nterface to ethcur var */
 105
 106 /* get the current device MAC */
 107 extern struct eth_device *eth_current;
 108
 109 static inline __attribute__((always_inline))
 110 struct eth_device *eth_get_dev(void)
 111 {
 112         return eth_current;
 113 }
 114 extern struct eth_device *eth_get_dev_by_name(const char *devname);
 115 extern struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */
 116 extern int eth_get_dev_index(void);             /* get the device index */
 117 extern void eth_parse_enetaddr(const char *addr, uchar *enetaddr);
 118 extern int eth_getenv_enetaddr(char *name, uchar *enetaddr);
 119 extern int eth_setenv_enetaddr(char *name, const uchar *enetaddr);
 120
 121 /*
 122  * Get the hardware address for an ethernet interface .
 123  * Args:
 124  *      base_name - base name for device (normally "eth")
 125  *      index - device index number (0 for first)
 126  *      enetaddr - returns 6 byte hardware address
 127  * Returns:
 128  *      Return true if the address is valid.
 129  */
 130 extern int eth_getenv_enetaddr_by_index(const char *base_name, int index,
 131                                         uchar *enetaddr);
 132
 133 #ifdef CONFIG_RANDOM_MACADDR
 134 /*
 135  * The u-boot policy does not allow hardcoded ethernet addresses. Under the
 136  * following circumstances a random generated address is allowed:
 137  *  - in emergency cases, where you need a working network connection to set
 138  *    the ethernet address.
 139  *    Eg. you want a rescue boot and don't have a serial port to access the
 140  *    CLI to set environment variables.
 141  *
 142  * In these cases, we generate a random locally administered ethernet address.
 143  *
 144  * Args:
 145  *  enetaddr - returns 6 byte hardware address
 146  */
 147 extern void eth_random_enetaddr(uchar *enetaddr);
 148 #endif
 149
 150 extern int usb_eth_initialize(bd_t *bi);
 151 extern int eth_init(bd_t *bis);                 /* Initialize the device */
 152 extern int eth_send(void *packet, int length);     /* Send a packet */
 153
 154 #ifdef CONFIG_API
 155 extern int eth_receive(void *packet, int length); /* Receive a packet*/
 156 extern void (*push_packet)(void *packet, int length);
 157 #endif
 158 extern int eth_rx(void);                        /* Check for received packets */
 159 extern void eth_halt(void);                     /* stop SCC */
 160 extern char *eth_get_name(void);                /* get name of current device */
 161
 162 /* Set active state */
 163 static inline __attribute__((always_inline)) int eth_init_state_only(bd_t *bis)
 164 {
 165         eth_get_dev()->state = ETH_STATE_ACTIVE;
 166
 167         return 0;
 168 }
 169 /* Set passive state */
 170 static inline __attribute__((always_inline)) void eth_halt_state_only(void)
 171 {
 172         eth_get_dev()->state = ETH_STATE_PASSIVE;
 173 }
 174
 175 /*
 176  * Set the hardware address for an ethernet interface based on 'eth%daddr'
 177  * environment variable (or just 'ethaddr' if eth_number is 0).
 178  * Args:
 179  *      base_name - base name for device (normally "eth")
 180  *      eth_number - value of %d (0 for first device of this type)
 181  * Returns:
 182  *      0 is success, non-zero is error status from driver.
 183  */
 184 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
 185                      int eth_number);
 186
 187 #ifdef CONFIG_MCAST_TFTP
 188 int eth_mcast_join(IPaddr_t mcast_addr, u8 join);
 189 u32 ether_crc(size_t len, unsigned char const *p);
 190 #endif
 191
 192
 193 /**********************************************************************/
 194 /*
 195  *      Protocol headers.
 196  */
 197
 198 /*
 199  *      Ethernet header
 200  */
 201
 202 struct ethernet_hdr {
 203         uchar           et_dest[6];     /* Destination node             */
 204         uchar           et_src[6];      /* Source node                  */
 205         ushort          et_protlen;     /* Protocol or length           */
 206 };
 207
 208 /* Ethernet header size */
 209 #define ETHER_HDR_SIZE  (sizeof(struct ethernet_hdr))
 210
 211 struct e802_hdr {
 212         uchar           et_dest[6];     /* Destination node             */
 213         uchar           et_src[6];      /* Source node                  */
 214         ushort          et_protlen;     /* Protocol or length           */
 215         uchar           et_dsap;        /* 802 DSAP                     */
 216         uchar           et_ssap;        /* 802 SSAP                     */
 217         uchar           et_ctl;         /* 802 control                  */
 218         uchar           et_snap1;       /* SNAP                         */
 219         uchar           et_snap2;
 220         uchar           et_snap3;
 221         ushort          et_prot;        /* 802 protocol                 */
 222 };
 223
 224 /* 802 + SNAP + ethernet header size */
 225 #define E802_HDR_SIZE   (sizeof(struct e802_hdr))
 226
 227 /*
 228  *      Virtual LAN Ethernet header
 229  */
 230 struct vlan_ethernet_hdr {
 231         uchar           vet_dest[6];    /* Destination node             */
 232         uchar           vet_src[6];     /* Source node                  */
 233         ushort          vet_vlan_type;  /* PROT_VLAN                    */
 234         ushort          vet_tag;        /* TAG of VLAN                  */
 235         ushort          vet_type;       /* protocol type                */
 236 };
 237
 238 /* VLAN Ethernet header size */
 239 #define VLAN_ETHER_HDR_SIZE     (sizeof(struct vlan_ethernet_hdr))
 240
 241 #define PROT_IP         0x0800          /* IP protocol                  */
 242 #define PROT_ARP        0x0806          /* IP ARP protocol              */
 243 #define PROT_RARP       0x8035          /* IP ARP protocol              */
 244 #define PROT_VLAN       0x8100          /* IEEE 802.1q protocol         */
 245
 246 #define IPPROTO_ICMP     1      /* Internet Control Message Protocol    */
 247 #define IPPROTO_UDP     17      /* User Datagram Protocol               */
 248
 249 /*
 250  *      Internet Protocol (IP) header.
 251  */
 252 struct ip_hdr {
 253         uchar           ip_hl_v;        /* header length and version    */
 254         uchar           ip_tos;         /* type of service              */
 255         ushort          ip_len;         /* total length                 */
 256         ushort          ip_id;          /* identification               */
 257         ushort          ip_off;         /* fragment offset field        */
 258         uchar           ip_ttl;         /* time to live                 */
 259         uchar           ip_p;           /* protocol                     */
 260         ushort          ip_sum;         /* checksum                     */
 261         IPaddr_t        ip_src;         /* Source IP address            */
 262         IPaddr_t        ip_dst;         /* Destination IP address       */
 263 };
 264
 265 #define IP_OFFS         0x1fff /* ip offset *= 8 */
 266 #define IP_FLAGS        0xe000 /* first 3 bits */
 267 #define IP_FLAGS_RES    0x8000 /* reserved */
 268 #define IP_FLAGS_DFRAG  0x4000 /* don't fragments */
 269 #define IP_FLAGS_MFRAG  0x2000 /* more fragments */
 270
 271 #define IP_HDR_SIZE             (sizeof(struct ip_hdr))
 272
 273 /*
 274  *      Internet Protocol (IP) + UDP header.
 275  */
 276 struct ip_udp_hdr {
 277         uchar           ip_hl_v;        /* header length and version    */
 278         uchar           ip_tos;         /* type of service              */
 279         ushort          ip_len;         /* total length                 */
 280         ushort          ip_id;          /* identification               */
 281         ushort          ip_off;         /* fragment offset field        */
 282         uchar           ip_ttl;         /* time to live                 */
 283         uchar           ip_p;           /* protocol                     */
 284         ushort          ip_sum;         /* checksum                     */
 285         IPaddr_t        ip_src;         /* Source IP address            */
 286         IPaddr_t        ip_dst;         /* Destination IP address       */
 287         ushort          udp_src;        /* UDP source port              */
 288         ushort          udp_dst;        /* UDP destination port         */
 289         ushort          udp_len;        /* Length of UDP packet         */
 290         ushort          udp_xsum;       /* Checksum                     */
 291 };
 292
 293 #define IP_UDP_HDR_SIZE         (sizeof(struct ip_udp_hdr))
 294 #define UDP_HDR_SIZE            (IP_UDP_HDR_SIZE - IP_HDR_SIZE)
 295
 296 /*
 297  *      Address Resolution Protocol (ARP) header.
 298  */
 299 struct arp_hdr {
 300         ushort          ar_hrd;         /* Format of hardware address   */
 301 #   define ARP_ETHER        1           /* Ethernet  hardware address   */
 302         ushort          ar_pro;         /* Format of protocol address   */
 303         uchar           ar_hln;         /* Length of hardware address   */
 304 #   define ARP_HLEN     6
 305         uchar           ar_pln;         /* Length of protocol address   */
 306 #   define ARP_PLEN     4
 307         ushort          ar_op;          /* Operation                    */
 308 #   define ARPOP_REQUEST    1           /* Request  to resolve  address */
 309 #   define ARPOP_REPLY      2           /* Response to previous request */
 310
 311 #   define RARPOP_REQUEST   3           /* Request  to resolve  address */
 312 #   define RARPOP_REPLY     4           /* Response to previous request */
 313
 314         /*
 315          * The remaining fields are variable in size, according to
 316          * the sizes above, and are defined as appropriate for
 317          * specific hardware/protocol combinations.
 318          */
 319         uchar           ar_data[0];
 320 #define ar_sha          ar_data[0]
 321 #define ar_spa          ar_data[ARP_HLEN]
 322 #define ar_tha          ar_data[ARP_HLEN + ARP_PLEN]
 323 #define ar_tpa          ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN]
 324 #if 0
 325         uchar           ar_sha[];       /* Sender hardware address      */
 326         uchar           ar_spa[];       /* Sender protocol address      */
 327         uchar           ar_tha[];       /* Target hardware address      */
 328         uchar           ar_tpa[];       /* Target protocol address      */
 329 #endif /* 0 */
 330 };
 331
 332 #define ARP_HDR_SIZE    (8+20)          /* Size assuming ethernet       */
 333
 334 /*
 335  * ICMP stuff (just enough to handle (host) redirect messages)
 336  */
 337 #define ICMP_ECHO_REPLY         0       /* Echo reply                   */
 338 #define ICMP_NOT_REACH          3       /* Detination unreachable       */
 339 #define ICMP_REDIRECT           5       /* Redirect (change route)      */
 340 #define ICMP_ECHO_REQUEST       8       /* Echo request                 */
 341
 342 /* Codes for REDIRECT. */
 343 #define ICMP_REDIR_NET          0       /* Redirect Net                 */
 344 #define ICMP_REDIR_HOST         1       /* Redirect Host                */
 345
 346 /* Codes for NOT_REACH */
 347 #define ICMP_NOT_REACH_PORT     3       /* Port unreachable             */
 348
 349 struct icmp_hdr {
 350         uchar           type;
 351         uchar           code;
 352         ushort          checksum;
 353         union {
 354                 struct {
 355                         ushort  id;
 356                         ushort  sequence;
 357                 } echo;
 358                 ulong   gateway;
 359                 struct {
 360                         ushort  unused;
 361                         ushort  mtu;
 362                 } frag;
 363                 uchar data[0];
 364         } un;
 365 };
 366
 367 #define ICMP_HDR_SIZE           (sizeof(struct icmp_hdr))
 368 #define IP_ICMP_HDR_SIZE        (IP_HDR_SIZE + ICMP_HDR_SIZE)
 369
 370 /*
 371  * Maximum packet size; used to allocate packet storage.
 372  * TFTP packets can be 524 bytes + IP header + ethernet header.
 373  * Lets be conservative, and go for 38 * 16.  (Must also be
 374  * a multiple of 32 bytes).
 375  */
 376 /*
 377  * AS.HARNOIS : Better to set PKTSIZE to maximum size because
 378  * traffic type is not always controlled
 379  * maximum packet size =  1518
 380  * maximum packet size and multiple of 32 bytes =  1536
 381  */
 382 #define PKTSIZE                 1518
 383 #define PKTSIZE_ALIGN           1536
 384 /*#define PKTSIZE               608*/
 385
 386 /*
 387  * Maximum receive ring size; that is, the number of packets
 388  * we can buffer before overflow happens. Basically, this just
 389  * needs to be enough to prevent a packet being discarded while
 390  * we are processing the previous one.
 391  */
 392 #define RINGSZ          4
 393 #define RINGSZ_LOG2     2
 394
 395 /**********************************************************************/
 396 /*
 397  *      Globals.
 398  *
 399  * Note:
 400  *
 401  * All variables of type IPaddr_t are stored in NETWORK byte order
 402  * (big endian).
 403  */
 404
 405 /* net.c */
 406 /** BOOTP EXTENTIONS **/
 407 extern IPaddr_t NetOurGatewayIP;        /* Our gateway IP address */
 408 extern IPaddr_t NetOurSubnetMask;       /* Our subnet mask (0 = unknown) */
 409 extern IPaddr_t NetOurDNSIP;    /* Our Domain Name Server (0 = unknown) */
 410 #if defined(CONFIG_BOOTP_DNS2)
 411 extern IPaddr_t NetOurDNS2IP;   /* Our 2nd Domain Name Server (0 = unknown) */
 412 #endif
 413 extern char     NetOurNISDomain[32];    /* Our NIS domain */
 414 extern char     NetOurHostName[32];     /* Our hostname */
 415 extern char     NetOurRootPath[64];     /* Our root path */
 416 extern ushort   NetBootFileSize;        /* Our boot file size in blocks */
 417 /** END OF BOOTP EXTENTIONS **/
 418 extern ulong            NetBootFileXferSize;    /* size of bootfile in bytes */
 419 extern uchar            NetOurEther[6];         /* Our ethernet address */
 420 extern uchar            NetServerEther[6];      /* Boot server enet address */
 421 extern IPaddr_t         NetOurIP;       /* Our    IP addr (0 = unknown) */
 422 extern IPaddr_t         NetServerIP;    /* Server IP addr (0 = unknown) */
 423 extern uchar            *NetTxPacket;           /* THE transmit packet */
 424 extern uchar            *NetRxPackets[PKTBUFSRX]; /* Receive packets */
 425 extern uchar            *NetRxPacket;           /* Current receive packet */
 426 extern int              NetRxPacketLen;         /* Current rx packet length */
 427 extern unsigned         NetIPID;                /* IP ID (counting) */
 428 extern uchar            NetBcastAddr[6];        /* Ethernet boardcast address */
 429 extern uchar            NetEtherNullAddr[6];
 430
 431 #define VLAN_NONE       4095                    /* untagged */
 432 #define VLAN_IDMASK     0x0fff                  /* mask of valid vlan id */
 433 extern ushort           NetOurVLAN;             /* Our VLAN */
 434 extern ushort           NetOurNativeVLAN;       /* Our Native VLAN */
 435
 436 extern int              NetRestartWrap;         /* Tried all network devices */
 437
 438 enum proto_t {
 439         BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
 440         TFTPSRV, TFTPPUT, LINKLOCAL
 441 };
 442
 443 /* from net/net.c */
 444 extern char     BootFile[128];                  /* Boot File name */
 445
 446 #if defined(CONFIG_CMD_DNS)
 447 extern char *NetDNSResolve;             /* The host to resolve  */
 448 extern char *NetDNSenvvar;              /* the env var to put the ip into */
 449 #endif
 450
 451 #if defined(CONFIG_CMD_PING)
 452 extern IPaddr_t NetPingIP;                      /* the ip address to ping */
 453 #endif
 454
 455 #if defined(CONFIG_CMD_CDP)
 456 /* when CDP completes these hold the return values */
 457 extern ushort CDPNativeVLAN;            /* CDP returned native VLAN */
 458 extern ushort CDPApplianceVLAN;         /* CDP returned appliance VLAN */
 459
 460 /*
 461  * Check for a CDP packet by examining the received MAC address field
 462  */
 463 static inline int is_cdp_packet(const uchar *et_addr)
 464 {
 465         extern const uchar NetCDPAddr[6];
 466
 467         return memcmp(et_addr, NetCDPAddr, 6) == 0;
 468 }
 469 #endif
 470
 471 #if defined(CONFIG_CMD_SNTP)
 472 extern IPaddr_t NetNtpServerIP;                 /* the ip address to NTP */
 473 extern int NetTimeOffset;                       /* offset time from UTC */
 474 #endif
 475
 476 #if defined(CONFIG_MCAST_TFTP)
 477 extern IPaddr_t Mcast_addr;
 478 #endif
 479
 480 /* Initialize the network adapter */
 481 extern void net_init(void);
 482 extern int NetLoop(enum proto_t);
 483
 484 /* Shutdown adapters and cleanup */
 485 extern void     NetStop(void);
 486
 487 /* Load failed.  Start again. */
 488 extern void     NetStartAgain(void);
 489
 490 /* Get size of the ethernet header when we send */
 491 extern int      NetEthHdrSize(void);
 492
 493 /* Set ethernet header; returns the size of the header */
 494 extern int NetSetEther(uchar *, uchar *, uint);
 495 extern int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot);
 496
 497 /* Set IP header */
 498 extern void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source);
 499 extern void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport,
 500                                 int sport, int len);
 501
 502 /* Checksum */
 503 extern int      NetCksumOk(uchar *, int);       /* Return true if cksum OK */
 504 extern uint     NetCksum(uchar *, int);         /* Calculate the checksum */
 505
 506 /* Callbacks */
 507 extern rxhand_f *net_get_udp_handler(void);     /* Get UDP RX packet handler */
 508 extern void net_set_udp_handler(rxhand_f *);    /* Set UDP RX packet handler */
 509 extern rxhand_f *net_get_arp_handler(void);     /* Get ARP RX packet handler */
 510 extern void net_set_arp_handler(rxhand_f *);    /* Set ARP RX packet handler */
 511 extern void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
 512 extern void     NetSetTimeout(ulong, thand_f *);/* Set timeout handler */
 513
 514 /* Network loop state */
 515 enum net_loop_state {
 516         NETLOOP_CONTINUE,
 517         NETLOOP_RESTART,
 518         NETLOOP_SUCCESS,
 519         NETLOOP_FAIL
 520 };
 521 extern enum net_loop_state net_state;
 522
 523 static inline void net_set_state(enum net_loop_state state)
 524 {
 525         debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state);
 526         net_state = state;
 527 }
 528
 529 /* Transmit a packet */
 530 static inline void NetSendPacket(uchar *pkt, int len)
 531 {
 532         (void) eth_send(pkt, len);
 533 }
 534
 535 /*
 536  * Transmit "NetTxPacket" as UDP packet, performing ARP request if needed
 537  *  (ether will be populated)
 538  *
 539  * @param ether Raw packet buffer
 540  * @param dest IP address to send the datagram to
 541  * @param dport Destination UDP port
 542  * @param sport Source UDP port
 543  * @param payload_len Length of data after the UDP header
 544  */
 545 extern int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport,
 546                         int sport, int payload_len);
 547
 548 /* Processes a received packet */
 549 extern void NetReceive(uchar *, int);
 550
 551 #ifdef CONFIG_NETCONSOLE
 552 void NcStart(void);
 553 int nc_input_packet(uchar *pkt, IPaddr_t src_ip, unsigned dest_port,
 554         unsigned src_port, unsigned len);
 555 #endif
 556
 557 static inline __attribute__((always_inline)) int eth_is_on_demand_init(void)
 558 {
 559 #ifdef CONFIG_NETCONSOLE
 560         extern enum proto_t net_loop_last_protocol;
 561
 562         return net_loop_last_protocol != NETCONS;
 563 #else
 564         return 1;
 565 #endif
 566 }
 567
 568 static inline void eth_set_last_protocol(int protocol)
 569 {
 570 #ifdef CONFIG_NETCONSOLE
 571         extern enum proto_t net_loop_last_protocol;
 572
 573         net_loop_last_protocol = protocol;
 574 #endif
 575 }
 576
 577 /*
 578  * Check if autoload is enabled. If so, use either NFS or TFTP to download
 579  * the boot file.
 580  */
 581 void net_auto_load(void);
 582
 583 /*
 584  * The following functions are a bit ugly, but necessary to deal with
 585  * alignment restrictions on ARM.
 586  *
 587  * We're using inline functions, which had the smallest memory
 588  * footprint in our tests.
 589  */
 590 /* return IP *in network byteorder* */
 591 static inline IPaddr_t NetReadIP(void *from)
 592 {
 593         IPaddr_t ip;
 594
 595         memcpy((void *)&ip, (void *)from, sizeof(ip));
 596         return ip;
 597 }
 598
 599 /* return ulong *in network byteorder* */
 600 static inline ulong NetReadLong(ulong *from)
 601 {
 602         ulong l;
 603
 604         memcpy((void *)&l, (void *)from, sizeof(l));
 605         return l;
 606 }
 607
 608 /* write IP *in network byteorder* */
 609 static inline void NetWriteIP(void *to, IPaddr_t ip)
 610 {
 611         memcpy(to, (void *)&ip, sizeof(ip));
 612 }
 613
 614 /* copy IP */
 615 static inline void NetCopyIP(void *to, void *from)
 616 {
 617         memcpy((void *)to, from, sizeof(IPaddr_t));
 618 }
 619
 620 /* copy ulong */
 621 static inline void NetCopyLong(ulong *to, ulong *from)
 622 {
 623         memcpy((void *)to, (void *)from, sizeof(ulong));
 624 }
 625
 626 /**
 627  * is_zero_ether_addr - Determine if give Ethernet address is all zeros.
 628  * @addr: Pointer to a six-byte array containing the Ethernet address
 629  *
 630  * Return true if the address is all zeroes.
 631  */
 632 static inline int is_zero_ether_addr(const u8 *addr)
 633 {
 634         return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
 635 }
 636
 637 /**
 638  * is_multicast_ether_addr - Determine if the Ethernet address is a multicast.
 639  * @addr: Pointer to a six-byte array containing the Ethernet address
 640  *
 641  * Return true if the address is a multicast address.
 642  * By definition the broadcast address is also a multicast address.
 643  */
 644 static inline int is_multicast_ether_addr(const u8 *addr)
 645 {
 646         return 0x01 & addr[0];
 647 }
 648
 649 /*
 650  * is_broadcast_ether_addr - Determine if the Ethernet address is broadcast
 651  * @addr: Pointer to a six-byte array containing the Ethernet address
 652  *
 653  * Return true if the address is the broadcast address.
 654  */
 655 static inline int is_broadcast_ether_addr(const u8 *addr)
 656 {
 657         return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) ==
 658                 0xff;
 659 }
 660
 661 /*
 662  * is_valid_ether_addr - Determine if the given Ethernet address is valid
 663  * @addr: Pointer to a six-byte array containing the Ethernet address
 664  *
 665  * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
 666  * a multicast address, and is not FF:FF:FF:FF:FF:FF.
 667  *
 668  * Return true if the address is valid.
 669  */
 670 static inline int is_valid_ether_addr(const u8 *addr)
 671 {
 672         /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
 673          * explicitly check for it here. */
 674         return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr);
 675 }
 676
 677 /* Convert an IP address to a string */
 678 extern void ip_to_string(IPaddr_t x, char *s);
 679
 680 /* Convert a string to ip address */
 681 extern IPaddr_t string_to_ip(const char *s);
 682
 683 /* Convert a VLAN id to a string */
 684 extern void VLAN_to_string(ushort x, char *s);
 685
 686 /* Convert a string to a vlan id */
 687 extern ushort string_to_VLAN(const char *s);
 688
 689 /* read a VLAN id from an environment variable */
 690 extern ushort getenv_VLAN(char *);
 691
 692 /* copy a filename (allow for "..." notation, limit length) */
 693 extern void copy_filename(char *dst, const char *src, int size);
 694
 695 /* get a random source port */
 696 extern unsigned int random_port(void);
 697
 698 /* Update U-Boot over TFTP */
 699 extern int update_tftp(ulong addr);
 700
 701 /**********************************************************************/
 702
 703 #endif /* __NET_H__ */