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 # if !defined(CONFIG_NET_MULTI)
  18 #  if defined(FEC_ENET) || defined(SCC_ENET)
  19 #   define CONFIG_NET_MULTI
  20 #  endif
  21 # endif
  22 #endif  /* CONFIG_8xx */
  23
  24 #if defined(CONFIG_MPC5xxx)
  25 # if !defined(CONFIG_NET_MULTI)
  26 #  if defined(CONFIG_MPC5xxx_FEC)
  27 #   define CONFIG_NET_MULTI
  28 #  endif
  29 # endif
  30 #endif  /* CONFIG_MPC5xxx */
  31
  32 #if !defined(CONFIG_NET_MULTI) && defined(CONFIG_CPM2)
  33 #include <config.h>
  34 #if defined(CONFIG_ETHER_ON_FCC)
  35 #if defined(CONFIG_ETHER_ON_SCC)
  36 #error "Ethernet not correctly defined"
  37 #endif /* CONFIG_ETHER_ON_SCC */
  38 #define CONFIG_NET_MULTI
  39 #if (CONFIG_ETHER_INDEX == 1)
  40 #define CONFIG_ETHER_ON_FCC1
  41 # define CONFIG_SYS_CMXFCR_MASK1        CONFIG_SYS_CMXFCR_MASK
  42 # define CONFIG_SYS_CMXFCR_VALUE1       CONFIG_SYS_CMXFCR_VALUE
  43 #elif (CONFIG_ETHER_INDEX == 2)
  44 #define CONFIG_ETHER_ON_FCC2
  45 # define CONFIG_SYS_CMXFCR_MASK2        CONFIG_SYS_CMXFCR_MASK
  46 # define CONFIG_SYS_CMXFCR_VALUE2       CONFIG_SYS_CMXFCR_VALUE
  47 #elif (CONFIG_ETHER_INDEX == 3)
  48 #define CONFIG_ETHER_ON_FCC3
  49 # define CONFIG_SYS_CMXFCR_MASK3        CONFIG_SYS_CMXFCR_MASK
  50 # define CONFIG_SYS_CMXFCR_VALUE3       CONFIG_SYS_CMXFCR_VALUE
  51 #endif /* CONFIG_ETHER_INDEX */
  52 #endif /* CONFIG_ETHER_ON_FCC */
  53 #endif /* !CONFIG_NET_MULTI && CONFIG_8260 */
  54
  55 #include <asm/byteorder.h>      /* for nton* / ntoh* stuff */
  56
  57
  58 /*
  59  *      The number of receive packet buffers, and the required packet buffer
  60  *      alignment in memory.
  61  *
  62  */
  63
  64 #ifdef CONFIG_SYS_RX_ETH_BUFFER
  65 # define PKTBUFSRX      CONFIG_SYS_RX_ETH_BUFFER
  66 #else
  67 # define PKTBUFSRX      4
  68 #endif
  69
  70 #define PKTALIGN        32
  71
  72 typedef ulong           IPaddr_t;
  73
  74
  75 /*
  76  * The current receive packet handler.  Called with a pointer to the
  77  * application packet, and a protocol type (PORT_BOOTPC or PORT_TFTP).
  78  * All other packets are dealt with without calling the handler.
  79  */
  80 typedef void    rxhand_f(uchar *, unsigned, unsigned, unsigned);
  81
  82 /*
  83  *      A timeout handler.  Called after time interval has expired.
  84  */
  85 typedef void    thand_f(void);
  86
  87 #define NAMESIZE 16
  88
  89 enum eth_state_t {
  90         ETH_STATE_INIT,
  91         ETH_STATE_PASSIVE,
  92         ETH_STATE_ACTIVE
  93 };
  94
  95 struct eth_device {
  96         char name[NAMESIZE];
  97         unsigned char enetaddr[6];
  98         int iobase;
  99         int state;
 100
 101         int  (*init) (struct eth_device*, bd_t*);
 102         int  (*send) (struct eth_device*, volatile void* packet, int length);
 103         int  (*recv) (struct eth_device*);
 104         void (*halt) (struct eth_device*);
 105 #ifdef CONFIG_MCAST_TFTP
 106         int (*mcast) (struct eth_device*, u32 ip, u8 set);
 107 #endif
 108         struct eth_device *next;
 109         void *priv;
 110 };
 111
 112 extern int eth_initialize(bd_t *bis);   /* Initialize network subsystem */
 113 extern int eth_register(struct eth_device* dev);/* Register network device */
 114 extern void eth_try_another(int first_restart); /* Change the device */
 115 #ifdef CONFIG_NET_MULTI
 116 extern void eth_set_current(void);              /* set nterface to ethcur var */
 117 #endif
 118 extern struct eth_device *eth_get_dev(void);    /* get the current device MAC */
 119 extern struct eth_device *eth_get_dev_by_name(char *devname); /* get device */
 120 extern struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */
 121 extern int eth_get_dev_index (void);            /* get the device index */
 122 extern void eth_parse_enetaddr(const char *addr, uchar *enetaddr);
 123 extern int eth_getenv_enetaddr(char *name, uchar *enetaddr);
 124 extern int eth_setenv_enetaddr(char *name, const uchar *enetaddr);
 125 extern int eth_getenv_enetaddr_by_index(int index, uchar *enetaddr);
 126
 127 extern int eth_init(bd_t *bis);                 /* Initialize the device */
 128 extern int eth_send(volatile void *packet, int length);    /* Send a packet */
 129 #ifdef CONFIG_API
 130 extern int eth_receive(volatile void *packet, int length); /* Receive a packet*/
 131 #endif
 132 extern int eth_rx(void);                        /* Check for received packets */
 133 extern void eth_halt(void);                     /* stop SCC */
 134 extern char *eth_get_name(void);                /* get name of current device */
 135
 136 #ifdef CONFIG_MCAST_TFTP
 137 int eth_mcast_join( IPaddr_t mcast_addr, u8 join);
 138 u32 ether_crc (size_t len, unsigned char const *p);
 139 #endif
 140
 141
 142 /**********************************************************************/
 143 /*
 144  *      Protocol headers.
 145  */
 146
 147 /*
 148  *      Ethernet header
 149  */
 150 typedef struct {
 151         uchar           et_dest[6];     /* Destination node             */
 152         uchar           et_src[6];      /* Source node                  */
 153         ushort          et_protlen;     /* Protocol or length           */
 154         uchar           et_dsap;        /* 802 DSAP                     */
 155         uchar           et_ssap;        /* 802 SSAP                     */
 156         uchar           et_ctl;         /* 802 control                  */
 157         uchar           et_snap1;       /* SNAP                         */
 158         uchar           et_snap2;
 159         uchar           et_snap3;
 160         ushort          et_prot;        /* 802 protocol                 */
 161 } Ethernet_t;
 162
 163 #define ETHER_HDR_SIZE  14              /* Ethernet header size         */
 164 #define E802_HDR_SIZE   22              /* 802 ethernet header size     */
 165
 166 /*
 167  *      Ethernet header
 168  */
 169 typedef struct {
 170         uchar           vet_dest[6];    /* Destination node             */
 171         uchar           vet_src[6];     /* Source node                  */
 172         ushort          vet_vlan_type;  /* PROT_VLAN                    */
 173         ushort          vet_tag;        /* TAG of VLAN                  */
 174         ushort          vet_type;       /* protocol type                */
 175 } VLAN_Ethernet_t;
 176
 177 #define VLAN_ETHER_HDR_SIZE     18      /* VLAN Ethernet header size    */
 178
 179 #define PROT_IP         0x0800          /* IP protocol                  */
 180 #define PROT_ARP        0x0806          /* IP ARP protocol              */
 181 #define PROT_RARP       0x8035          /* IP ARP protocol              */
 182 #define PROT_VLAN       0x8100          /* IEEE 802.1q protocol         */
 183
 184 #define IPPROTO_ICMP     1      /* Internet Control Message Protocol    */
 185 #define IPPROTO_UDP     17      /* User Datagram Protocol               */
 186
 187 /*
 188  *      Internet Protocol (IP) header.
 189  */
 190 typedef struct {
 191         uchar           ip_hl_v;        /* header length and version    */
 192         uchar           ip_tos;         /* type of service              */
 193         ushort          ip_len;         /* total length                 */
 194         ushort          ip_id;          /* identification               */
 195         ushort          ip_off;         /* fragment offset field        */
 196         uchar           ip_ttl;         /* time to live                 */
 197         uchar           ip_p;           /* protocol                     */
 198         ushort          ip_sum;         /* checksum                     */
 199         IPaddr_t        ip_src;         /* Source IP address            */
 200         IPaddr_t        ip_dst;         /* Destination IP address       */
 201         ushort          udp_src;        /* UDP source port              */
 202         ushort          udp_dst;        /* UDP destination port         */
 203         ushort          udp_len;        /* Length of UDP packet         */
 204         ushort          udp_xsum;       /* Checksum                     */
 205 } IP_t;
 206
 207 #define IP_OFFS         0x1fff /* ip offset *= 8 */
 208 #define IP_FLAGS        0xe000 /* first 3 bits */
 209 #define IP_FLAGS_RES    0x8000 /* reserved */
 210 #define IP_FLAGS_DFRAG  0x4000 /* don't fragments */
 211 #define IP_FLAGS_MFRAG  0x2000 /* more fragments */
 212
 213 #define IP_HDR_SIZE_NO_UDP      (sizeof (IP_t) - 8)
 214 #define IP_HDR_SIZE             (sizeof (IP_t))
 215
 216
 217 /*
 218  *      Address Resolution Protocol (ARP) header.
 219  */
 220 typedef struct
 221 {
 222         ushort          ar_hrd;         /* Format of hardware address   */
 223 #   define ARP_ETHER        1           /* Ethernet  hardware address   */
 224         ushort          ar_pro;         /* Format of protocol address   */
 225         uchar           ar_hln;         /* Length of hardware address   */
 226         uchar           ar_pln;         /* Length of protocol address   */
 227         ushort          ar_op;          /* Operation                    */
 228 #   define ARPOP_REQUEST    1           /* Request  to resolve  address */
 229 #   define ARPOP_REPLY      2           /* Response to previous request */
 230
 231 #   define RARPOP_REQUEST   3           /* Request  to resolve  address */
 232 #   define RARPOP_REPLY     4           /* Response to previous request */
 233
 234         /*
 235          * The remaining fields are variable in size, according to
 236          * the sizes above, and are defined as appropriate for
 237          * specific hardware/protocol combinations.
 238          */
 239         uchar           ar_data[0];
 240 #if 0
 241         uchar           ar_sha[];       /* Sender hardware address      */
 242         uchar           ar_spa[];       /* Sender protocol address      */
 243         uchar           ar_tha[];       /* Target hardware address      */
 244         uchar           ar_tpa[];       /* Target protocol address      */
 245 #endif /* 0 */
 246 } ARP_t;
 247
 248 #define ARP_HDR_SIZE    (8+20)          /* Size assuming ethernet       */
 249
 250 /*
 251  * ICMP stuff (just enough to handle (host) redirect messages)
 252  */
 253 #define ICMP_ECHO_REPLY         0       /* Echo reply                   */
 254 #define ICMP_REDIRECT           5       /* Redirect (change route)      */
 255 #define ICMP_ECHO_REQUEST       8       /* Echo request                 */
 256
 257 /* Codes for REDIRECT. */
 258 #define ICMP_REDIR_NET          0       /* Redirect Net                 */
 259 #define ICMP_REDIR_HOST         1       /* Redirect Host                */
 260
 261 typedef struct icmphdr {
 262         uchar           type;
 263         uchar           code;
 264         ushort          checksum;
 265         union {
 266                 struct {
 267                         ushort  id;
 268                         ushort  sequence;
 269                 } echo;
 270                 ulong   gateway;
 271                 struct {
 272                         ushort  __unused;
 273                         ushort  mtu;
 274                 } frag;
 275         } un;
 276 } ICMP_t;
 277
 278
 279 /*
 280  * Maximum packet size; used to allocate packet storage.
 281  * TFTP packets can be 524 bytes + IP header + ethernet header.
 282  * Lets be conservative, and go for 38 * 16.  (Must also be
 283  * a multiple of 32 bytes).
 284  */
 285 /*
 286  * AS.HARNOIS : Better to set PKTSIZE to maximum size because
 287  * traffic type is not always controlled
 288  * maximum packet size =  1518
 289  * maximum packet size and multiple of 32 bytes =  1536
 290  */
 291 #define PKTSIZE                 1518
 292 #define PKTSIZE_ALIGN           1536
 293 /*#define PKTSIZE               608*/
 294
 295 /*
 296  * Maximum receive ring size; that is, the number of packets
 297  * we can buffer before overflow happens. Basically, this just
 298  * needs to be enough to prevent a packet being discarded while
 299  * we are processing the previous one.
 300  */
 301 #define RINGSZ          4
 302 #define RINGSZ_LOG2     2
 303
 304 /**********************************************************************/
 305 /*
 306  *      Globals.
 307  *
 308  * Note:
 309  *
 310  * All variables of type IPaddr_t are stored in NETWORK byte order
 311  * (big endian).
 312  */
 313
 314 /* net.c */
 315 /** BOOTP EXTENTIONS **/
 316 extern IPaddr_t         NetOurGatewayIP;        /* Our gateway IP addresse      */
 317 extern IPaddr_t         NetOurSubnetMask;       /* Our subnet mask (0 = unknown)*/
 318 extern IPaddr_t         NetOurDNSIP;     /* Our Domain Name Server (0 = unknown)*/
 319 #if defined(CONFIG_BOOTP_DNS2)
 320 extern IPaddr_t         NetOurDNS2IP;    /* Our 2nd Domain Name Server (0 = unknown)*/
 321 #endif
 322 extern char             NetOurNISDomain[32];    /* Our NIS domain               */
 323 extern char             NetOurHostName[32];     /* Our hostname                 */
 324 extern char             NetOurRootPath[64];     /* Our root path                */
 325 extern ushort           NetBootFileSize;        /* Our boot file size in blocks */
 326 /** END OF BOOTP EXTENTIONS **/
 327 extern ulong            NetBootFileXferSize;    /* size of bootfile in bytes    */
 328 extern uchar            NetOurEther[6];         /* Our ethernet address         */
 329 extern uchar            NetServerEther[6];      /* Boot server enet address     */
 330 extern IPaddr_t         NetOurIP;               /* Our    IP addr (0 = unknown) */
 331 extern IPaddr_t         NetServerIP;            /* Server IP addr (0 = unknown) */
 332 extern volatile uchar * NetTxPacket;            /* THE transmit packet          */
 333 extern volatile uchar * NetRxPackets[PKTBUFSRX];/* Receive packets              */
 334 extern volatile uchar * NetRxPacket;            /* Current receive packet       */
 335 extern int              NetRxPacketLen;         /* Current rx packet length     */
 336 extern unsigned         NetIPID;                /* IP ID (counting)             */
 337 extern uchar            NetBcastAddr[6];        /* Ethernet boardcast address   */
 338 extern uchar            NetEtherNullAddr[6];
 339
 340 #define VLAN_NONE       4095                    /* untagged                     */
 341 #define VLAN_IDMASK     0x0fff                  /* mask of valid vlan id        */
 342 extern ushort           NetOurVLAN;             /* Our VLAN                     */
 343 extern ushort           NetOurNativeVLAN;       /* Our Native VLAN              */
 344
 345 extern uchar            NetCDPAddr[6];          /* Ethernet CDP address         */
 346 extern ushort           CDPNativeVLAN;          /* CDP returned native VLAN     */
 347 extern ushort           CDPApplianceVLAN;       /* CDP returned appliance VLAN  */
 348
 349 extern int              NetState;               /* Network loop state           */
 350 #define NETLOOP_CONTINUE        1
 351 #define NETLOOP_RESTART         2
 352 #define NETLOOP_SUCCESS         3
 353 #define NETLOOP_FAIL            4
 354
 355 #ifdef CONFIG_NET_MULTI
 356 extern int              NetRestartWrap;         /* Tried all network devices    */
 357 #endif
 358
 359 typedef enum { BOOTP, RARP, ARP, TFTP, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP } proto_t;
 360
 361 /* from net/net.c */
 362 extern char     BootFile[128];                  /* Boot File name               */
 363
 364 #if defined(CONFIG_CMD_DNS)
 365 extern char *NetDNSResolve;             /* The host to resolve  */
 366 extern char *NetDNSenvvar;              /* the env var to put the ip into */
 367 #endif
 368
 369 #if defined(CONFIG_CMD_PING)
 370 extern IPaddr_t NetPingIP;                      /* the ip address to ping               */
 371 #endif
 372
 373 #if defined(CONFIG_CMD_CDP)
 374 /* when CDP completes these hold the return values */
 375 extern ushort CDPNativeVLAN;
 376 extern ushort CDPApplianceVLAN;
 377 #endif
 378
 379 #if defined(CONFIG_CMD_SNTP)
 380 extern IPaddr_t NetNtpServerIP;                 /* the ip address to NTP        */
 381 extern int NetTimeOffset;                       /* offset time from UTC         */
 382 #endif
 383
 384 /* Initialize the network adapter */
 385 extern int      NetLoop(proto_t);
 386
 387 /* Shutdown adapters and cleanup */
 388 extern void     NetStop(void);
 389
 390 /* Load failed.  Start again. */
 391 extern void     NetStartAgain(void);
 392
 393 /* Get size of the ethernet header when we send */
 394 extern int      NetEthHdrSize(void);
 395
 396 /* Set ethernet header; returns the size of the header */
 397 extern int      NetSetEther(volatile uchar *, uchar *, uint);
 398
 399 /* Set IP header */
 400 extern void     NetSetIP(volatile uchar *, IPaddr_t, int, int, int);
 401
 402 /* Checksum */
 403 extern int      NetCksumOk(uchar *, int);       /* Return true if cksum OK      */
 404 extern uint     NetCksum(uchar *, int);         /* Calculate the checksum       */
 405
 406 /* Set callbacks */
 407 extern void     NetSetHandler(rxhand_f *);      /* Set RX packet handler        */
 408 extern void     NetSetTimeout(ulong, thand_f *);/* Set timeout handler          */
 409
 410 /* Transmit "NetTxPacket" */
 411 extern void     NetSendPacket(volatile uchar *, int);
 412
 413 /* Transmit UDP packet, performing ARP request if needed */
 414 extern int      NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len);
 415
 416 /* Processes a received packet */
 417 extern void     NetReceive(volatile uchar *, int);
 418
 419 /*
 420  * The following functions are a bit ugly, but necessary to deal with
 421  * alignment restrictions on ARM.
 422  *
 423  * We're using inline functions, which had the smallest memory
 424  * footprint in our tests.
 425  */
 426 /* return IP *in network byteorder* */
 427 static inline IPaddr_t NetReadIP(volatile void *from)
 428 {
 429         IPaddr_t ip;
 430         memcpy((void*)&ip, (void*)from, sizeof(ip));
 431         return ip;
 432 }
 433
 434 /* return ulong *in network byteorder* */
 435 static inline ulong NetReadLong(ulong *from)
 436 {
 437         ulong l;
 438         memcpy((void*)&l, (void*)from, sizeof(l));
 439         return l;
 440 }
 441
 442 /* write IP *in network byteorder* */
 443 static inline void NetWriteIP(void *to, IPaddr_t ip)
 444 {
 445         memcpy(to, (void*)&ip, sizeof(ip));
 446 }
 447
 448 /* copy IP */
 449 static inline void NetCopyIP(volatile void *to, void *from)
 450 {
 451         memcpy((void*)to, from, sizeof(IPaddr_t));
 452 }
 453
 454 /* copy ulong */
 455 static inline void NetCopyLong(ulong *to, ulong *from)
 456 {
 457         memcpy((void*)to, (void*)from, sizeof(ulong));
 458 }
 459
 460 /**
 461  * is_zero_ether_addr - Determine if give Ethernet address is all zeros.
 462  * @addr: Pointer to a six-byte array containing the Ethernet address
 463  *
 464  * Return true if the address is all zeroes.
 465  */
 466 static inline int is_zero_ether_addr(const u8 *addr)
 467 {
 468         return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
 469 }
 470
 471 /**
 472  * is_multicast_ether_addr - Determine if the Ethernet address is a multicast.
 473  * @addr: Pointer to a six-byte array containing the Ethernet address
 474  *
 475  * Return true if the address is a multicast address.
 476  * By definition the broadcast address is also a multicast address.
 477  */
 478 static inline int is_multicast_ether_addr(const u8 *addr)
 479 {
 480         return (0x01 & addr[0]);
 481 }
 482
 483 /**
 484  * is_valid_ether_addr - Determine if the given Ethernet address is valid
 485  * @addr: Pointer to a six-byte array containing the Ethernet address
 486  *
 487  * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
 488  * a multicast address, and is not FF:FF:FF:FF:FF:FF.
 489  *
 490  * Return true if the address is valid.
 491  */
 492 static inline int is_valid_ether_addr(const u8 * addr)
 493 {
 494         /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
 495          * explicitly check for it here. */
 496         return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr);
 497 }
 498
 499 /* Convert an IP address to a string */
 500 extern void     ip_to_string (IPaddr_t x, char *s);
 501
 502 /* Convert a string to ip address */
 503 extern IPaddr_t string_to_ip(char *s);
 504
 505 /* Convert a VLAN id to a string */
 506 extern void     VLAN_to_string (ushort x, char *s);
 507
 508 /* Convert a string to a vlan id */
 509 extern ushort string_to_VLAN(char *s);
 510
 511 /* read a VLAN id from an environment variable */
 512 extern ushort getenv_VLAN(char *);
 513
 514 /* copy a filename (allow for "..." notation, limit length) */
 515 extern void     copy_filename (char *dst, char *src, int size);
 516
 517 /* get a random source port */
 518 extern unsigned int random_port(void);
 519
 520 /**********************************************************************/
 521
 522 #endif /* __NET_H__ */