1 /* 2 * LiMon Monitor (LiMon) - Network. 3 * 4 * Copyright 1994 - 2000 Neil Russell. 5 * (See License) 6 * SPDX-License-Identifier: GPL-2.0 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 #ifdef CONFIG_DM_ETH 82 /** 83 * struct eth_pdata - Platform data for Ethernet MAC controllers 84 * 85 * @iobase: The base address of the hardware registers 86 * @enetaddr: The Ethernet MAC address that is loaded from EEPROM or env 87 */ 88 struct eth_pdata { 89 phys_addr_t iobase; 90 unsigned char enetaddr[6]; 91 }; 92 93 /** 94 * struct eth_ops - functions of Ethernet MAC controllers 95 * 96 * start: Prepare the hardware to send and receive packets 97 * send: Send the bytes passed in "packet" as a packet on the wire 98 * recv: Check if the hardware received a packet. Call the network stack if so 99 * stop: Stop the hardware from looking for packets - may be called even if 100 * state == PASSIVE 101 * mcast: Join or leave a multicast group (for TFTP) - optional 102 * write_hwaddr: Write a MAC address to the hardware (used to pass it to Linux 103 * on some platforms like ARM). This function expects the 104 * eth_pdata::enetaddr field to be populated - optional 105 * read_rom_hwaddr: Some devices have a backup of the MAC address stored in a 106 * ROM on the board. This is how the driver should expose it 107 * to the network stack. This function should fill in the 108 * eth_pdata::enetaddr field - optional 109 */ 110 struct eth_ops { 111 int (*start)(struct udevice *dev); 112 int (*send)(struct udevice *dev, void *packet, int length); 113 int (*recv)(struct udevice *dev); 114 void (*stop)(struct udevice *dev); 115 #ifdef CONFIG_MCAST_TFTP 116 int (*mcast)(struct udevice *dev, const u8 *enetaddr, int join); 117 #endif 118 int (*write_hwaddr)(struct udevice *dev); 119 int (*read_rom_hwaddr)(struct udevice *dev); 120 }; 121 122 #define eth_get_ops(dev) ((struct eth_ops *)(dev)->driver->ops) 123 124 struct udevice *eth_get_dev(void); /* get the current device */ 125 unsigned char *eth_get_ethaddr(void); /* get the current device MAC */ 126 /* Used only when NetConsole is enabled */ 127 int eth_init_state_only(void); /* Set active state */ 128 void eth_halt_state_only(void); /* Set passive state */ 129 #endif 130 131 #ifndef CONFIG_DM_ETH 132 struct eth_device { 133 char name[16]; 134 unsigned char enetaddr[6]; 135 phys_addr_t iobase; 136 int state; 137 138 int (*init) (struct eth_device *, bd_t *); 139 int (*send) (struct eth_device *, void *packet, int length); 140 int (*recv) (struct eth_device *); 141 void (*halt) (struct eth_device *); 142 #ifdef CONFIG_MCAST_TFTP 143 int (*mcast) (struct eth_device *, const u8 *enetaddr, u8 set); 144 #endif 145 int (*write_hwaddr) (struct eth_device *); 146 struct eth_device *next; 147 int index; 148 void *priv; 149 }; 150 151 int eth_register(struct eth_device *dev);/* Register network device */ 152 int eth_unregister(struct eth_device *dev);/* Remove network device */ 153 154 extern struct eth_device *eth_current; 155 156 static inline __attribute__((always_inline)) 157 struct eth_device *eth_get_dev(void) 158 { 159 return eth_current; 160 } 161 struct eth_device *eth_get_dev_by_name(const char *devname); 162 struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */ 163 164 /* get the current device MAC */ 165 static inline unsigned char *eth_get_ethaddr(void) 166 { 167 if (eth_current) 168 return eth_current->enetaddr; 169 return NULL; 170 } 171 172 /* Set active state */ 173 static inline __attribute__((always_inline)) int eth_init_state_only(void) 174 { 175 eth_get_dev()->state = ETH_STATE_ACTIVE; 176 177 return 0; 178 } 179 /* Set passive state */ 180 static inline __attribute__((always_inline)) void eth_halt_state_only(void) 181 { 182 eth_get_dev()->state = ETH_STATE_PASSIVE; 183 } 184 185 /* 186 * Set the hardware address for an ethernet interface based on 'eth%daddr' 187 * environment variable (or just 'ethaddr' if eth_number is 0). 188 * Args: 189 * base_name - base name for device (normally "eth") 190 * eth_number - value of %d (0 for first device of this type) 191 * Returns: 192 * 0 is success, non-zero is error status from driver. 193 */ 194 int eth_write_hwaddr(struct eth_device *dev, const char *base_name, 195 int eth_number); 196 197 int usb_eth_initialize(bd_t *bi); 198 #endif 199 200 int eth_initialize(void); /* Initialize network subsystem */ 201 void eth_try_another(int first_restart); /* Change the device */ 202 void eth_set_current(void); /* set nterface to ethcur var */ 203 204 int eth_get_dev_index(void); /* get the device index */ 205 void eth_parse_enetaddr(const char *addr, uchar *enetaddr); 206 int eth_getenv_enetaddr(char *name, uchar *enetaddr); 207 int eth_setenv_enetaddr(char *name, const uchar *enetaddr); 208 209 /* 210 * Get the hardware address for an ethernet interface . 211 * Args: 212 * base_name - base name for device (normally "eth") 213 * index - device index number (0 for first) 214 * enetaddr - returns 6 byte hardware address 215 * Returns: 216 * Return true if the address is valid. 217 */ 218 int eth_getenv_enetaddr_by_index(const char *base_name, int index, 219 uchar *enetaddr); 220 221 int eth_init(void); /* Initialize the device */ 222 int eth_send(void *packet, int length); /* Send a packet */ 223 224 #ifdef CONFIG_API 225 int eth_receive(void *packet, int length); /* Receive a packet*/ 226 extern void (*push_packet)(void *packet, int length); 227 #endif 228 int eth_rx(void); /* Check for received packets */ 229 void eth_halt(void); /* stop SCC */ 230 const char *eth_get_name(void); /* get name of current device */ 231 232 #ifdef CONFIG_MCAST_TFTP 233 int eth_mcast_join(IPaddr_t mcast_addr, int join); 234 u32 ether_crc(size_t len, unsigned char const *p); 235 #endif 236 237 238 /**********************************************************************/ 239 /* 240 * Protocol headers. 241 */ 242 243 /* 244 * Ethernet header 245 */ 246 247 struct ethernet_hdr { 248 uchar et_dest[6]; /* Destination node */ 249 uchar et_src[6]; /* Source node */ 250 ushort et_protlen; /* Protocol or length */ 251 }; 252 253 /* Ethernet header size */ 254 #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr)) 255 256 #define ETH_FCS_LEN 4 /* Octets in the FCS */ 257 258 struct e802_hdr { 259 uchar et_dest[6]; /* Destination node */ 260 uchar et_src[6]; /* Source node */ 261 ushort et_protlen; /* Protocol or length */ 262 uchar et_dsap; /* 802 DSAP */ 263 uchar et_ssap; /* 802 SSAP */ 264 uchar et_ctl; /* 802 control */ 265 uchar et_snap1; /* SNAP */ 266 uchar et_snap2; 267 uchar et_snap3; 268 ushort et_prot; /* 802 protocol */ 269 }; 270 271 /* 802 + SNAP + ethernet header size */ 272 #define E802_HDR_SIZE (sizeof(struct e802_hdr)) 273 274 /* 275 * Virtual LAN Ethernet header 276 */ 277 struct vlan_ethernet_hdr { 278 uchar vet_dest[6]; /* Destination node */ 279 uchar vet_src[6]; /* Source node */ 280 ushort vet_vlan_type; /* PROT_VLAN */ 281 ushort vet_tag; /* TAG of VLAN */ 282 ushort vet_type; /* protocol type */ 283 }; 284 285 /* VLAN Ethernet header size */ 286 #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr)) 287 288 #define PROT_IP 0x0800 /* IP protocol */ 289 #define PROT_ARP 0x0806 /* IP ARP protocol */ 290 #define PROT_RARP 0x8035 /* IP ARP protocol */ 291 #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */ 292 293 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */ 294 #define IPPROTO_UDP 17 /* User Datagram Protocol */ 295 296 /* 297 * Internet Protocol (IP) header. 298 */ 299 struct ip_hdr { 300 uchar ip_hl_v; /* header length and version */ 301 uchar ip_tos; /* type of service */ 302 ushort ip_len; /* total length */ 303 ushort ip_id; /* identification */ 304 ushort ip_off; /* fragment offset field */ 305 uchar ip_ttl; /* time to live */ 306 uchar ip_p; /* protocol */ 307 ushort ip_sum; /* checksum */ 308 IPaddr_t ip_src; /* Source IP address */ 309 IPaddr_t ip_dst; /* Destination IP address */ 310 }; 311 312 #define IP_OFFS 0x1fff /* ip offset *= 8 */ 313 #define IP_FLAGS 0xe000 /* first 3 bits */ 314 #define IP_FLAGS_RES 0x8000 /* reserved */ 315 #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */ 316 #define IP_FLAGS_MFRAG 0x2000 /* more fragments */ 317 318 #define IP_HDR_SIZE (sizeof(struct ip_hdr)) 319 320 /* 321 * Internet Protocol (IP) + UDP header. 322 */ 323 struct ip_udp_hdr { 324 uchar ip_hl_v; /* header length and version */ 325 uchar ip_tos; /* type of service */ 326 ushort ip_len; /* total length */ 327 ushort ip_id; /* identification */ 328 ushort ip_off; /* fragment offset field */ 329 uchar ip_ttl; /* time to live */ 330 uchar ip_p; /* protocol */ 331 ushort ip_sum; /* checksum */ 332 IPaddr_t ip_src; /* Source IP address */ 333 IPaddr_t ip_dst; /* Destination IP address */ 334 ushort udp_src; /* UDP source port */ 335 ushort udp_dst; /* UDP destination port */ 336 ushort udp_len; /* Length of UDP packet */ 337 ushort udp_xsum; /* Checksum */ 338 }; 339 340 #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr)) 341 #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE) 342 343 /* 344 * Address Resolution Protocol (ARP) header. 345 */ 346 struct arp_hdr { 347 ushort ar_hrd; /* Format of hardware address */ 348 # define ARP_ETHER 1 /* Ethernet hardware address */ 349 ushort ar_pro; /* Format of protocol address */ 350 uchar ar_hln; /* Length of hardware address */ 351 # define ARP_HLEN 6 352 uchar ar_pln; /* Length of protocol address */ 353 # define ARP_PLEN 4 354 ushort ar_op; /* Operation */ 355 # define ARPOP_REQUEST 1 /* Request to resolve address */ 356 # define ARPOP_REPLY 2 /* Response to previous request */ 357 358 # define RARPOP_REQUEST 3 /* Request to resolve address */ 359 # define RARPOP_REPLY 4 /* Response to previous request */ 360 361 /* 362 * The remaining fields are variable in size, according to 363 * the sizes above, and are defined as appropriate for 364 * specific hardware/protocol combinations. 365 */ 366 uchar ar_data[0]; 367 #define ar_sha ar_data[0] 368 #define ar_spa ar_data[ARP_HLEN] 369 #define ar_tha ar_data[ARP_HLEN + ARP_PLEN] 370 #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN] 371 #if 0 372 uchar ar_sha[]; /* Sender hardware address */ 373 uchar ar_spa[]; /* Sender protocol address */ 374 uchar ar_tha[]; /* Target hardware address */ 375 uchar ar_tpa[]; /* Target protocol address */ 376 #endif /* 0 */ 377 }; 378 379 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */ 380 381 /* 382 * ICMP stuff (just enough to handle (host) redirect messages) 383 */ 384 #define ICMP_ECHO_REPLY 0 /* Echo reply */ 385 #define ICMP_NOT_REACH 3 /* Detination unreachable */ 386 #define ICMP_REDIRECT 5 /* Redirect (change route) */ 387 #define ICMP_ECHO_REQUEST 8 /* Echo request */ 388 389 /* Codes for REDIRECT. */ 390 #define ICMP_REDIR_NET 0 /* Redirect Net */ 391 #define ICMP_REDIR_HOST 1 /* Redirect Host */ 392 393 /* Codes for NOT_REACH */ 394 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */ 395 396 struct icmp_hdr { 397 uchar type; 398 uchar code; 399 ushort checksum; 400 union { 401 struct { 402 ushort id; 403 ushort sequence; 404 } echo; 405 ulong gateway; 406 struct { 407 ushort unused; 408 ushort mtu; 409 } frag; 410 uchar data[0]; 411 } un; 412 }; 413 414 #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr)) 415 #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE) 416 417 /* 418 * Maximum packet size; used to allocate packet storage. 419 * TFTP packets can be 524 bytes + IP header + ethernet header. 420 * Lets be conservative, and go for 38 * 16. (Must also be 421 * a multiple of 32 bytes). 422 */ 423 /* 424 * AS.HARNOIS : Better to set PKTSIZE to maximum size because 425 * traffic type is not always controlled 426 * maximum packet size = 1518 427 * maximum packet size and multiple of 32 bytes = 1536 428 */ 429 #define PKTSIZE 1518 430 #define PKTSIZE_ALIGN 1536 431 /*#define PKTSIZE 608*/ 432 433 /* 434 * Maximum receive ring size; that is, the number of packets 435 * we can buffer before overflow happens. Basically, this just 436 * needs to be enough to prevent a packet being discarded while 437 * we are processing the previous one. 438 */ 439 #define RINGSZ 4 440 #define RINGSZ_LOG2 2 441 442 /**********************************************************************/ 443 /* 444 * Globals. 445 * 446 * Note: 447 * 448 * All variables of type IPaddr_t are stored in NETWORK byte order 449 * (big endian). 450 */ 451 452 /* net.c */ 453 /** BOOTP EXTENTIONS **/ 454 extern IPaddr_t NetOurGatewayIP; /* Our gateway IP address */ 455 extern IPaddr_t NetOurSubnetMask; /* Our subnet mask (0 = unknown) */ 456 extern IPaddr_t NetOurDNSIP; /* Our Domain Name Server (0 = unknown) */ 457 #if defined(CONFIG_BOOTP_DNS2) 458 extern IPaddr_t NetOurDNS2IP; /* Our 2nd Domain Name Server (0 = unknown) */ 459 #endif 460 extern char NetOurNISDomain[32]; /* Our NIS domain */ 461 extern char NetOurHostName[32]; /* Our hostname */ 462 extern char NetOurRootPath[64]; /* Our root path */ 463 extern ushort NetBootFileSize; /* Our boot file size in blocks */ 464 /** END OF BOOTP EXTENTIONS **/ 465 extern ulong NetBootFileXferSize; /* size of bootfile in bytes */ 466 extern uchar NetOurEther[6]; /* Our ethernet address */ 467 extern uchar NetServerEther[6]; /* Boot server enet address */ 468 extern IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */ 469 extern IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */ 470 extern uchar *NetTxPacket; /* THE transmit packet */ 471 extern uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */ 472 extern uchar *NetRxPacket; /* Current receive packet */ 473 extern int NetRxPacketLen; /* Current rx packet length */ 474 extern unsigned NetIPID; /* IP ID (counting) */ 475 extern uchar NetBcastAddr[6]; /* Ethernet boardcast address */ 476 extern uchar NetEtherNullAddr[6]; 477 478 #define VLAN_NONE 4095 /* untagged */ 479 #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */ 480 extern ushort NetOurVLAN; /* Our VLAN */ 481 extern ushort NetOurNativeVLAN; /* Our Native VLAN */ 482 483 extern int NetRestartWrap; /* Tried all network devices */ 484 485 enum proto_t { 486 BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP, 487 TFTPSRV, TFTPPUT, LINKLOCAL 488 }; 489 490 /* from net/net.c */ 491 extern char BootFile[128]; /* Boot File name */ 492 493 #if defined(CONFIG_CMD_DNS) 494 extern char *NetDNSResolve; /* The host to resolve */ 495 extern char *NetDNSenvvar; /* the env var to put the ip into */ 496 #endif 497 498 #if defined(CONFIG_CMD_PING) 499 extern IPaddr_t NetPingIP; /* the ip address to ping */ 500 #endif 501 502 #if defined(CONFIG_CMD_CDP) 503 /* when CDP completes these hold the return values */ 504 extern ushort CDPNativeVLAN; /* CDP returned native VLAN */ 505 extern ushort CDPApplianceVLAN; /* CDP returned appliance VLAN */ 506 507 /* 508 * Check for a CDP packet by examining the received MAC address field 509 */ 510 static inline int is_cdp_packet(const uchar *et_addr) 511 { 512 extern const uchar NetCDPAddr[6]; 513 514 return memcmp(et_addr, NetCDPAddr, 6) == 0; 515 } 516 #endif 517 518 #if defined(CONFIG_CMD_SNTP) 519 extern IPaddr_t NetNtpServerIP; /* the ip address to NTP */ 520 extern int NetTimeOffset; /* offset time from UTC */ 521 #endif 522 523 #if defined(CONFIG_MCAST_TFTP) 524 extern IPaddr_t Mcast_addr; 525 #endif 526 527 /* Initialize the network adapter */ 528 void net_init(void); 529 int NetLoop(enum proto_t); 530 531 /* Shutdown adapters and cleanup */ 532 void NetStop(void); 533 534 /* Load failed. Start again. */ 535 void NetStartAgain(void); 536 537 /* Get size of the ethernet header when we send */ 538 int NetEthHdrSize(void); 539 540 /* Set ethernet header; returns the size of the header */ 541 int NetSetEther(uchar *, uchar *, uint); 542 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot); 543 544 /* Set IP header */ 545 void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source); 546 void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport, 547 int sport, int len); 548 549 /** 550 * compute_ip_checksum() - Compute IP checksum 551 * 552 * @addr: Address to check (must be 16-bit aligned) 553 * @nbytes: Number of bytes to check (normally a multiple of 2) 554 * @return 16-bit IP checksum 555 */ 556 unsigned compute_ip_checksum(const void *addr, unsigned nbytes); 557 558 /** 559 * add_ip_checksums() - add two IP checksums 560 * 561 * @offset: Offset of first sum (if odd we do a byte-swap) 562 * @sum: First checksum 563 * @new_sum: New checksum to add 564 * @return updated 16-bit IP checksum 565 */ 566 unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum); 567 568 /** 569 * ip_checksum_ok() - check if a checksum is correct 570 * 571 * This works by making sure the checksum sums to 0 572 * 573 * @addr: Address to check (must be 16-bit aligned) 574 * @nbytes: Number of bytes to check (normally a multiple of 2) 575 * @return true if the checksum matches, false if not 576 */ 577 int ip_checksum_ok(const void *addr, unsigned nbytes); 578 579 /* Callbacks */ 580 rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */ 581 void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */ 582 rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */ 583 void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */ 584 void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */ 585 void NetSetTimeout(ulong, thand_f *);/* Set timeout handler */ 586 587 /* Network loop state */ 588 enum net_loop_state { 589 NETLOOP_CONTINUE, 590 NETLOOP_RESTART, 591 NETLOOP_SUCCESS, 592 NETLOOP_FAIL 593 }; 594 extern enum net_loop_state net_state; 595 596 static inline void net_set_state(enum net_loop_state state) 597 { 598 debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state); 599 net_state = state; 600 } 601 602 /* Transmit a packet */ 603 static inline void NetSendPacket(uchar *pkt, int len) 604 { 605 (void) eth_send(pkt, len); 606 } 607 608 /* 609 * Transmit "NetTxPacket" as UDP packet, performing ARP request if needed 610 * (ether will be populated) 611 * 612 * @param ether Raw packet buffer 613 * @param dest IP address to send the datagram to 614 * @param dport Destination UDP port 615 * @param sport Source UDP port 616 * @param payload_len Length of data after the UDP header 617 */ 618 int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, 619 int sport, int payload_len); 620 621 /* Processes a received packet */ 622 void NetReceive(uchar *, int); 623 624 #ifdef CONFIG_NETCONSOLE 625 void NcStart(void); 626 int nc_input_packet(uchar *pkt, IPaddr_t src_ip, unsigned dest_port, 627 unsigned src_port, unsigned len); 628 #endif 629 630 static inline __attribute__((always_inline)) int eth_is_on_demand_init(void) 631 { 632 #ifdef CONFIG_NETCONSOLE 633 extern enum proto_t net_loop_last_protocol; 634 635 return net_loop_last_protocol != NETCONS; 636 #else 637 return 1; 638 #endif 639 } 640 641 static inline void eth_set_last_protocol(int protocol) 642 { 643 #ifdef CONFIG_NETCONSOLE 644 extern enum proto_t net_loop_last_protocol; 645 646 net_loop_last_protocol = protocol; 647 #endif 648 } 649 650 /* 651 * Check if autoload is enabled. If so, use either NFS or TFTP to download 652 * the boot file. 653 */ 654 void net_auto_load(void); 655 656 /* 657 * The following functions are a bit ugly, but necessary to deal with 658 * alignment restrictions on ARM. 659 * 660 * We're using inline functions, which had the smallest memory 661 * footprint in our tests. 662 */ 663 /* return IP *in network byteorder* */ 664 static inline IPaddr_t NetReadIP(void *from) 665 { 666 IPaddr_t ip; 667 668 memcpy((void *)&ip, (void *)from, sizeof(ip)); 669 return ip; 670 } 671 672 /* return ulong *in network byteorder* */ 673 static inline ulong NetReadLong(ulong *from) 674 { 675 ulong l; 676 677 memcpy((void *)&l, (void *)from, sizeof(l)); 678 return l; 679 } 680 681 /* write IP *in network byteorder* */ 682 static inline void NetWriteIP(void *to, IPaddr_t ip) 683 { 684 memcpy(to, (void *)&ip, sizeof(ip)); 685 } 686 687 /* copy IP */ 688 static inline void NetCopyIP(void *to, void *from) 689 { 690 memcpy((void *)to, from, sizeof(IPaddr_t)); 691 } 692 693 /* copy ulong */ 694 static inline void NetCopyLong(ulong *to, ulong *from) 695 { 696 memcpy((void *)to, (void *)from, sizeof(ulong)); 697 } 698 699 /** 700 * is_zero_ether_addr - Determine if give Ethernet address is all zeros. 701 * @addr: Pointer to a six-byte array containing the Ethernet address 702 * 703 * Return true if the address is all zeroes. 704 */ 705 static inline int is_zero_ether_addr(const u8 *addr) 706 { 707 return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]); 708 } 709 710 /** 711 * is_multicast_ether_addr - Determine if the Ethernet address is a multicast. 712 * @addr: Pointer to a six-byte array containing the Ethernet address 713 * 714 * Return true if the address is a multicast address. 715 * By definition the broadcast address is also a multicast address. 716 */ 717 static inline int is_multicast_ether_addr(const u8 *addr) 718 { 719 return 0x01 & addr[0]; 720 } 721 722 /* 723 * is_broadcast_ether_addr - Determine if the Ethernet address is broadcast 724 * @addr: Pointer to a six-byte array containing the Ethernet address 725 * 726 * Return true if the address is the broadcast address. 727 */ 728 static inline int is_broadcast_ether_addr(const u8 *addr) 729 { 730 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 731 0xff; 732 } 733 734 /* 735 * is_valid_ether_addr - Determine if the given Ethernet address is valid 736 * @addr: Pointer to a six-byte array containing the Ethernet address 737 * 738 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not 739 * a multicast address, and is not FF:FF:FF:FF:FF:FF. 740 * 741 * Return true if the address is valid. 742 */ 743 static inline int is_valid_ether_addr(const u8 *addr) 744 { 745 /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to 746 * explicitly check for it here. */ 747 return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr); 748 } 749 750 /** 751 * eth_random_addr - Generate software assigned random Ethernet address 752 * @addr: Pointer to a six-byte array containing the Ethernet address 753 * 754 * Generate a random Ethernet address (MAC) that is not multicast 755 * and has the local assigned bit set. 756 */ 757 static inline void eth_random_addr(uchar *addr) 758 { 759 int i; 760 unsigned int seed = get_timer(0); 761 762 for (i = 0; i < 6; i++) 763 addr[i] = rand_r(&seed); 764 765 addr[0] &= 0xfe; /* clear multicast bit */ 766 addr[0] |= 0x02; /* set local assignment bit (IEEE802) */ 767 } 768 769 /* Convert an IP address to a string */ 770 void ip_to_string(IPaddr_t x, char *s); 771 772 /* Convert a string to ip address */ 773 IPaddr_t string_to_ip(const char *s); 774 775 /* Convert a VLAN id to a string */ 776 void VLAN_to_string(ushort x, char *s); 777 778 /* Convert a string to a vlan id */ 779 ushort string_to_VLAN(const char *s); 780 781 /* read a VLAN id from an environment variable */ 782 ushort getenv_VLAN(char *); 783 784 /* copy a filename (allow for "..." notation, limit length) */ 785 void copy_filename(char *dst, const char *src, int size); 786 787 /* get a random source port */ 788 unsigned int random_port(void); 789 790 /* Update U-Boot over TFTP */ 791 int update_tftp(ulong addr); 792 793 /**********************************************************************/ 794 795 #endif /* __NET_H__ */ 796