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. If so, set the pointer to the 99 * packet buffer in the packetp parameter. If not, return an error or 0 to 100 * indicate that the hardware receive FIFO is empty 101 * stop: Stop the hardware from looking for packets - may be called even if 102 * state == PASSIVE 103 * mcast: Join or leave a multicast group (for TFTP) - optional 104 * write_hwaddr: Write a MAC address to the hardware (used to pass it to Linux 105 * on some platforms like ARM). This function expects the 106 * eth_pdata::enetaddr field to be populated - optional 107 * read_rom_hwaddr: Some devices have a backup of the MAC address stored in a 108 * ROM on the board. This is how the driver should expose it 109 * to the network stack. This function should fill in the 110 * eth_pdata::enetaddr field - optional 111 */ 112 struct eth_ops { 113 int (*start)(struct udevice *dev); 114 int (*send)(struct udevice *dev, void *packet, int length); 115 int (*recv)(struct udevice *dev, uchar **packetp); 116 void (*stop)(struct udevice *dev); 117 #ifdef CONFIG_MCAST_TFTP 118 int (*mcast)(struct udevice *dev, const u8 *enetaddr, int join); 119 #endif 120 int (*write_hwaddr)(struct udevice *dev); 121 int (*read_rom_hwaddr)(struct udevice *dev); 122 }; 123 124 #define eth_get_ops(dev) ((struct eth_ops *)(dev)->driver->ops) 125 126 struct udevice *eth_get_dev(void); /* get the current device */ 127 unsigned char *eth_get_ethaddr(void); /* get the current device MAC */ 128 /* Used only when NetConsole is enabled */ 129 int eth_init_state_only(void); /* Set active state */ 130 void eth_halt_state_only(void); /* Set passive state */ 131 #endif 132 133 #ifndef CONFIG_DM_ETH 134 struct eth_device { 135 char name[16]; 136 unsigned char enetaddr[6]; 137 phys_addr_t iobase; 138 int state; 139 140 int (*init) (struct eth_device *, bd_t *); 141 int (*send) (struct eth_device *, void *packet, int length); 142 int (*recv) (struct eth_device *); 143 void (*halt) (struct eth_device *); 144 #ifdef CONFIG_MCAST_TFTP 145 int (*mcast) (struct eth_device *, const u8 *enetaddr, u8 set); 146 #endif 147 int (*write_hwaddr) (struct eth_device *); 148 struct eth_device *next; 149 int index; 150 void *priv; 151 }; 152 153 int eth_register(struct eth_device *dev);/* Register network device */ 154 int eth_unregister(struct eth_device *dev);/* Remove network device */ 155 156 extern struct eth_device *eth_current; 157 158 static inline __attribute__((always_inline)) 159 struct eth_device *eth_get_dev(void) 160 { 161 return eth_current; 162 } 163 struct eth_device *eth_get_dev_by_name(const char *devname); 164 struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */ 165 166 /* get the current device MAC */ 167 static inline unsigned char *eth_get_ethaddr(void) 168 { 169 if (eth_current) 170 return eth_current->enetaddr; 171 return NULL; 172 } 173 174 /* Set active state */ 175 static inline __attribute__((always_inline)) int eth_init_state_only(void) 176 { 177 eth_get_dev()->state = ETH_STATE_ACTIVE; 178 179 return 0; 180 } 181 /* Set passive state */ 182 static inline __attribute__((always_inline)) void eth_halt_state_only(void) 183 { 184 eth_get_dev()->state = ETH_STATE_PASSIVE; 185 } 186 187 /* 188 * Set the hardware address for an ethernet interface based on 'eth%daddr' 189 * environment variable (or just 'ethaddr' if eth_number is 0). 190 * Args: 191 * base_name - base name for device (normally "eth") 192 * eth_number - value of %d (0 for first device of this type) 193 * Returns: 194 * 0 is success, non-zero is error status from driver. 195 */ 196 int eth_write_hwaddr(struct eth_device *dev, const char *base_name, 197 int eth_number); 198 199 int usb_eth_initialize(bd_t *bi); 200 #endif 201 202 int eth_initialize(void); /* Initialize network subsystem */ 203 void eth_try_another(int first_restart); /* Change the device */ 204 void eth_set_current(void); /* set nterface to ethcur var */ 205 206 int eth_get_dev_index(void); /* get the device index */ 207 void eth_parse_enetaddr(const char *addr, uchar *enetaddr); 208 int eth_getenv_enetaddr(char *name, uchar *enetaddr); 209 int eth_setenv_enetaddr(char *name, const uchar *enetaddr); 210 211 /* 212 * Get the hardware address for an ethernet interface . 213 * Args: 214 * base_name - base name for device (normally "eth") 215 * index - device index number (0 for first) 216 * enetaddr - returns 6 byte hardware address 217 * Returns: 218 * Return true if the address is valid. 219 */ 220 int eth_getenv_enetaddr_by_index(const char *base_name, int index, 221 uchar *enetaddr); 222 223 int eth_init(void); /* Initialize the device */ 224 int eth_send(void *packet, int length); /* Send a packet */ 225 226 #ifdef CONFIG_API 227 int eth_receive(void *packet, int length); /* Receive a packet*/ 228 extern void (*push_packet)(void *packet, int length); 229 #endif 230 int eth_rx(void); /* Check for received packets */ 231 void eth_halt(void); /* stop SCC */ 232 const char *eth_get_name(void); /* get name of current device */ 233 234 #ifdef CONFIG_MCAST_TFTP 235 int eth_mcast_join(IPaddr_t mcast_addr, int join); 236 u32 ether_crc(size_t len, unsigned char const *p); 237 #endif 238 239 240 /**********************************************************************/ 241 /* 242 * Protocol headers. 243 */ 244 245 /* 246 * Ethernet header 247 */ 248 249 struct ethernet_hdr { 250 uchar et_dest[6]; /* Destination node */ 251 uchar et_src[6]; /* Source node */ 252 ushort et_protlen; /* Protocol or length */ 253 }; 254 255 /* Ethernet header size */ 256 #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr)) 257 258 #define ETH_FCS_LEN 4 /* Octets in the FCS */ 259 260 struct e802_hdr { 261 uchar et_dest[6]; /* Destination node */ 262 uchar et_src[6]; /* Source node */ 263 ushort et_protlen; /* Protocol or length */ 264 uchar et_dsap; /* 802 DSAP */ 265 uchar et_ssap; /* 802 SSAP */ 266 uchar et_ctl; /* 802 control */ 267 uchar et_snap1; /* SNAP */ 268 uchar et_snap2; 269 uchar et_snap3; 270 ushort et_prot; /* 802 protocol */ 271 }; 272 273 /* 802 + SNAP + ethernet header size */ 274 #define E802_HDR_SIZE (sizeof(struct e802_hdr)) 275 276 /* 277 * Virtual LAN Ethernet header 278 */ 279 struct vlan_ethernet_hdr { 280 uchar vet_dest[6]; /* Destination node */ 281 uchar vet_src[6]; /* Source node */ 282 ushort vet_vlan_type; /* PROT_VLAN */ 283 ushort vet_tag; /* TAG of VLAN */ 284 ushort vet_type; /* protocol type */ 285 }; 286 287 /* VLAN Ethernet header size */ 288 #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr)) 289 290 #define PROT_IP 0x0800 /* IP protocol */ 291 #define PROT_ARP 0x0806 /* IP ARP protocol */ 292 #define PROT_RARP 0x8035 /* IP ARP protocol */ 293 #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */ 294 295 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */ 296 #define IPPROTO_UDP 17 /* User Datagram Protocol */ 297 298 /* 299 * Internet Protocol (IP) header. 300 */ 301 struct ip_hdr { 302 uchar ip_hl_v; /* header length and version */ 303 uchar ip_tos; /* type of service */ 304 ushort ip_len; /* total length */ 305 ushort ip_id; /* identification */ 306 ushort ip_off; /* fragment offset field */ 307 uchar ip_ttl; /* time to live */ 308 uchar ip_p; /* protocol */ 309 ushort ip_sum; /* checksum */ 310 IPaddr_t ip_src; /* Source IP address */ 311 IPaddr_t ip_dst; /* Destination IP address */ 312 }; 313 314 #define IP_OFFS 0x1fff /* ip offset *= 8 */ 315 #define IP_FLAGS 0xe000 /* first 3 bits */ 316 #define IP_FLAGS_RES 0x8000 /* reserved */ 317 #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */ 318 #define IP_FLAGS_MFRAG 0x2000 /* more fragments */ 319 320 #define IP_HDR_SIZE (sizeof(struct ip_hdr)) 321 322 /* 323 * Internet Protocol (IP) + UDP header. 324 */ 325 struct ip_udp_hdr { 326 uchar ip_hl_v; /* header length and version */ 327 uchar ip_tos; /* type of service */ 328 ushort ip_len; /* total length */ 329 ushort ip_id; /* identification */ 330 ushort ip_off; /* fragment offset field */ 331 uchar ip_ttl; /* time to live */ 332 uchar ip_p; /* protocol */ 333 ushort ip_sum; /* checksum */ 334 IPaddr_t ip_src; /* Source IP address */ 335 IPaddr_t ip_dst; /* Destination IP address */ 336 ushort udp_src; /* UDP source port */ 337 ushort udp_dst; /* UDP destination port */ 338 ushort udp_len; /* Length of UDP packet */ 339 ushort udp_xsum; /* Checksum */ 340 }; 341 342 #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr)) 343 #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE) 344 345 /* 346 * Address Resolution Protocol (ARP) header. 347 */ 348 struct arp_hdr { 349 ushort ar_hrd; /* Format of hardware address */ 350 # define ARP_ETHER 1 /* Ethernet hardware address */ 351 ushort ar_pro; /* Format of protocol address */ 352 uchar ar_hln; /* Length of hardware address */ 353 # define ARP_HLEN 6 354 uchar ar_pln; /* Length of protocol address */ 355 # define ARP_PLEN 4 356 ushort ar_op; /* Operation */ 357 # define ARPOP_REQUEST 1 /* Request to resolve address */ 358 # define ARPOP_REPLY 2 /* Response to previous request */ 359 360 # define RARPOP_REQUEST 3 /* Request to resolve address */ 361 # define RARPOP_REPLY 4 /* Response to previous request */ 362 363 /* 364 * The remaining fields are variable in size, according to 365 * the sizes above, and are defined as appropriate for 366 * specific hardware/protocol combinations. 367 */ 368 uchar ar_data[0]; 369 #define ar_sha ar_data[0] 370 #define ar_spa ar_data[ARP_HLEN] 371 #define ar_tha ar_data[ARP_HLEN + ARP_PLEN] 372 #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN] 373 #if 0 374 uchar ar_sha[]; /* Sender hardware address */ 375 uchar ar_spa[]; /* Sender protocol address */ 376 uchar ar_tha[]; /* Target hardware address */ 377 uchar ar_tpa[]; /* Target protocol address */ 378 #endif /* 0 */ 379 }; 380 381 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */ 382 383 /* 384 * ICMP stuff (just enough to handle (host) redirect messages) 385 */ 386 #define ICMP_ECHO_REPLY 0 /* Echo reply */ 387 #define ICMP_NOT_REACH 3 /* Detination unreachable */ 388 #define ICMP_REDIRECT 5 /* Redirect (change route) */ 389 #define ICMP_ECHO_REQUEST 8 /* Echo request */ 390 391 /* Codes for REDIRECT. */ 392 #define ICMP_REDIR_NET 0 /* Redirect Net */ 393 #define ICMP_REDIR_HOST 1 /* Redirect Host */ 394 395 /* Codes for NOT_REACH */ 396 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */ 397 398 struct icmp_hdr { 399 uchar type; 400 uchar code; 401 ushort checksum; 402 union { 403 struct { 404 ushort id; 405 ushort sequence; 406 } echo; 407 ulong gateway; 408 struct { 409 ushort unused; 410 ushort mtu; 411 } frag; 412 uchar data[0]; 413 } un; 414 }; 415 416 #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr)) 417 #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE) 418 419 /* 420 * Maximum packet size; used to allocate packet storage. 421 * TFTP packets can be 524 bytes + IP header + ethernet header. 422 * Lets be conservative, and go for 38 * 16. (Must also be 423 * a multiple of 32 bytes). 424 */ 425 /* 426 * AS.HARNOIS : Better to set PKTSIZE to maximum size because 427 * traffic type is not always controlled 428 * maximum packet size = 1518 429 * maximum packet size and multiple of 32 bytes = 1536 430 */ 431 #define PKTSIZE 1518 432 #define PKTSIZE_ALIGN 1536 433 /*#define PKTSIZE 608*/ 434 435 /* 436 * Maximum receive ring size; that is, the number of packets 437 * we can buffer before overflow happens. Basically, this just 438 * needs to be enough to prevent a packet being discarded while 439 * we are processing the previous one. 440 */ 441 #define RINGSZ 4 442 #define RINGSZ_LOG2 2 443 444 /**********************************************************************/ 445 /* 446 * Globals. 447 * 448 * Note: 449 * 450 * All variables of type IPaddr_t are stored in NETWORK byte order 451 * (big endian). 452 */ 453 454 /* net.c */ 455 /** BOOTP EXTENTIONS **/ 456 extern IPaddr_t NetOurGatewayIP; /* Our gateway IP address */ 457 extern IPaddr_t NetOurSubnetMask; /* Our subnet mask (0 = unknown) */ 458 extern IPaddr_t NetOurDNSIP; /* Our Domain Name Server (0 = unknown) */ 459 #if defined(CONFIG_BOOTP_DNS2) 460 extern IPaddr_t NetOurDNS2IP; /* Our 2nd Domain Name Server (0 = unknown) */ 461 #endif 462 extern char NetOurNISDomain[32]; /* Our NIS domain */ 463 extern char NetOurHostName[32]; /* Our hostname */ 464 extern char NetOurRootPath[64]; /* Our root path */ 465 extern ushort NetBootFileSize; /* Our boot file size in blocks */ 466 /** END OF BOOTP EXTENTIONS **/ 467 extern ulong NetBootFileXferSize; /* size of bootfile in bytes */ 468 extern uchar NetOurEther[6]; /* Our ethernet address */ 469 extern uchar NetServerEther[6]; /* Boot server enet address */ 470 extern IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */ 471 extern IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */ 472 extern uchar *NetTxPacket; /* THE transmit packet */ 473 #ifdef CONFIG_DM_ETH 474 extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */ 475 #else 476 extern uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */ 477 #endif 478 extern uchar *NetRxPacket; /* Current receive packet */ 479 extern int NetRxPacketLen; /* Current rx packet length */ 480 extern unsigned NetIPID; /* IP ID (counting) */ 481 extern uchar NetBcastAddr[6]; /* Ethernet boardcast address */ 482 extern uchar NetEtherNullAddr[6]; 483 484 #define VLAN_NONE 4095 /* untagged */ 485 #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */ 486 extern ushort NetOurVLAN; /* Our VLAN */ 487 extern ushort NetOurNativeVLAN; /* Our Native VLAN */ 488 489 extern int NetRestartWrap; /* Tried all network devices */ 490 491 enum proto_t { 492 BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP, 493 TFTPSRV, TFTPPUT, LINKLOCAL 494 }; 495 496 /* from net/net.c */ 497 extern char BootFile[128]; /* Boot File name */ 498 499 #if defined(CONFIG_CMD_DNS) 500 extern char *NetDNSResolve; /* The host to resolve */ 501 extern char *NetDNSenvvar; /* the env var to put the ip into */ 502 #endif 503 504 #if defined(CONFIG_CMD_PING) 505 extern IPaddr_t NetPingIP; /* the ip address to ping */ 506 #endif 507 508 #if defined(CONFIG_CMD_CDP) 509 /* when CDP completes these hold the return values */ 510 extern ushort CDPNativeVLAN; /* CDP returned native VLAN */ 511 extern ushort CDPApplianceVLAN; /* CDP returned appliance VLAN */ 512 513 /* 514 * Check for a CDP packet by examining the received MAC address field 515 */ 516 static inline int is_cdp_packet(const uchar *et_addr) 517 { 518 extern const uchar NetCDPAddr[6]; 519 520 return memcmp(et_addr, NetCDPAddr, 6) == 0; 521 } 522 #endif 523 524 #if defined(CONFIG_CMD_SNTP) 525 extern IPaddr_t NetNtpServerIP; /* the ip address to NTP */ 526 extern int NetTimeOffset; /* offset time from UTC */ 527 #endif 528 529 #if defined(CONFIG_MCAST_TFTP) 530 extern IPaddr_t Mcast_addr; 531 #endif 532 533 /* Initialize the network adapter */ 534 void net_init(void); 535 int NetLoop(enum proto_t); 536 537 /* Shutdown adapters and cleanup */ 538 void NetStop(void); 539 540 /* Load failed. Start again. */ 541 void NetStartAgain(void); 542 543 /* Get size of the ethernet header when we send */ 544 int NetEthHdrSize(void); 545 546 /* Set ethernet header; returns the size of the header */ 547 int NetSetEther(uchar *, uchar *, uint); 548 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot); 549 550 /* Set IP header */ 551 void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source); 552 void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport, 553 int sport, int len); 554 555 /** 556 * compute_ip_checksum() - Compute IP checksum 557 * 558 * @addr: Address to check (must be 16-bit aligned) 559 * @nbytes: Number of bytes to check (normally a multiple of 2) 560 * @return 16-bit IP checksum 561 */ 562 unsigned compute_ip_checksum(const void *addr, unsigned nbytes); 563 564 /** 565 * add_ip_checksums() - add two IP checksums 566 * 567 * @offset: Offset of first sum (if odd we do a byte-swap) 568 * @sum: First checksum 569 * @new_sum: New checksum to add 570 * @return updated 16-bit IP checksum 571 */ 572 unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum); 573 574 /** 575 * ip_checksum_ok() - check if a checksum is correct 576 * 577 * This works by making sure the checksum sums to 0 578 * 579 * @addr: Address to check (must be 16-bit aligned) 580 * @nbytes: Number of bytes to check (normally a multiple of 2) 581 * @return true if the checksum matches, false if not 582 */ 583 int ip_checksum_ok(const void *addr, unsigned nbytes); 584 585 /* Callbacks */ 586 rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */ 587 void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */ 588 rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */ 589 void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */ 590 void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */ 591 void NetSetTimeout(ulong, thand_f *);/* Set timeout handler */ 592 593 /* Network loop state */ 594 enum net_loop_state { 595 NETLOOP_CONTINUE, 596 NETLOOP_RESTART, 597 NETLOOP_SUCCESS, 598 NETLOOP_FAIL 599 }; 600 extern enum net_loop_state net_state; 601 602 static inline void net_set_state(enum net_loop_state state) 603 { 604 debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state); 605 net_state = state; 606 } 607 608 /* Transmit a packet */ 609 static inline void NetSendPacket(uchar *pkt, int len) 610 { 611 (void) eth_send(pkt, len); 612 } 613 614 /* 615 * Transmit "NetTxPacket" as UDP packet, performing ARP request if needed 616 * (ether will be populated) 617 * 618 * @param ether Raw packet buffer 619 * @param dest IP address to send the datagram to 620 * @param dport Destination UDP port 621 * @param sport Source UDP port 622 * @param payload_len Length of data after the UDP header 623 */ 624 int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, 625 int sport, int payload_len); 626 627 #ifndef CONFIG_DM_ETH 628 #define NetReceive(in_packet, len) net_process_received_packet(in_packet, len) 629 #endif 630 /* Processes a received packet */ 631 void net_process_received_packet(uchar *in_packet, int len); 632 633 #ifdef CONFIG_NETCONSOLE 634 void NcStart(void); 635 int nc_input_packet(uchar *pkt, IPaddr_t src_ip, unsigned dest_port, 636 unsigned src_port, unsigned len); 637 #endif 638 639 static inline __attribute__((always_inline)) int eth_is_on_demand_init(void) 640 { 641 #ifdef CONFIG_NETCONSOLE 642 extern enum proto_t net_loop_last_protocol; 643 644 return net_loop_last_protocol != NETCONS; 645 #else 646 return 1; 647 #endif 648 } 649 650 static inline void eth_set_last_protocol(int protocol) 651 { 652 #ifdef CONFIG_NETCONSOLE 653 extern enum proto_t net_loop_last_protocol; 654 655 net_loop_last_protocol = protocol; 656 #endif 657 } 658 659 /* 660 * Check if autoload is enabled. If so, use either NFS or TFTP to download 661 * the boot file. 662 */ 663 void net_auto_load(void); 664 665 /* 666 * The following functions are a bit ugly, but necessary to deal with 667 * alignment restrictions on ARM. 668 * 669 * We're using inline functions, which had the smallest memory 670 * footprint in our tests. 671 */ 672 /* return IP *in network byteorder* */ 673 static inline IPaddr_t NetReadIP(void *from) 674 { 675 IPaddr_t ip; 676 677 memcpy((void *)&ip, (void *)from, sizeof(ip)); 678 return ip; 679 } 680 681 /* return ulong *in network byteorder* */ 682 static inline ulong NetReadLong(ulong *from) 683 { 684 ulong l; 685 686 memcpy((void *)&l, (void *)from, sizeof(l)); 687 return l; 688 } 689 690 /* write IP *in network byteorder* */ 691 static inline void NetWriteIP(void *to, IPaddr_t ip) 692 { 693 memcpy(to, (void *)&ip, sizeof(ip)); 694 } 695 696 /* copy IP */ 697 static inline void NetCopyIP(void *to, void *from) 698 { 699 memcpy((void *)to, from, sizeof(IPaddr_t)); 700 } 701 702 /* copy ulong */ 703 static inline void NetCopyLong(ulong *to, ulong *from) 704 { 705 memcpy((void *)to, (void *)from, sizeof(ulong)); 706 } 707 708 /** 709 * is_zero_ether_addr - Determine if give Ethernet address is all zeros. 710 * @addr: Pointer to a six-byte array containing the Ethernet address 711 * 712 * Return true if the address is all zeroes. 713 */ 714 static inline int is_zero_ether_addr(const u8 *addr) 715 { 716 return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]); 717 } 718 719 /** 720 * is_multicast_ether_addr - Determine if the Ethernet address is a multicast. 721 * @addr: Pointer to a six-byte array containing the Ethernet address 722 * 723 * Return true if the address is a multicast address. 724 * By definition the broadcast address is also a multicast address. 725 */ 726 static inline int is_multicast_ether_addr(const u8 *addr) 727 { 728 return 0x01 & addr[0]; 729 } 730 731 /* 732 * is_broadcast_ether_addr - Determine if the Ethernet address is broadcast 733 * @addr: Pointer to a six-byte array containing the Ethernet address 734 * 735 * Return true if the address is the broadcast address. 736 */ 737 static inline int is_broadcast_ether_addr(const u8 *addr) 738 { 739 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 740 0xff; 741 } 742 743 /* 744 * is_valid_ether_addr - Determine if the given Ethernet address is valid 745 * @addr: Pointer to a six-byte array containing the Ethernet address 746 * 747 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not 748 * a multicast address, and is not FF:FF:FF:FF:FF:FF. 749 * 750 * Return true if the address is valid. 751 */ 752 static inline int is_valid_ether_addr(const u8 *addr) 753 { 754 /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to 755 * explicitly check for it here. */ 756 return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr); 757 } 758 759 /** 760 * eth_random_addr - Generate software assigned random Ethernet address 761 * @addr: Pointer to a six-byte array containing the Ethernet address 762 * 763 * Generate a random Ethernet address (MAC) that is not multicast 764 * and has the local assigned bit set. 765 */ 766 static inline void eth_random_addr(uchar *addr) 767 { 768 int i; 769 unsigned int seed = get_timer(0); 770 771 for (i = 0; i < 6; i++) 772 addr[i] = rand_r(&seed); 773 774 addr[0] &= 0xfe; /* clear multicast bit */ 775 addr[0] |= 0x02; /* set local assignment bit (IEEE802) */ 776 } 777 778 /* Convert an IP address to a string */ 779 void ip_to_string(IPaddr_t x, char *s); 780 781 /* Convert a string to ip address */ 782 IPaddr_t string_to_ip(const char *s); 783 784 /* Convert a VLAN id to a string */ 785 void VLAN_to_string(ushort x, char *s); 786 787 /* Convert a string to a vlan id */ 788 ushort string_to_VLAN(const char *s); 789 790 /* read a VLAN id from an environment variable */ 791 ushort getenv_VLAN(char *); 792 793 /* copy a filename (allow for "..." notation, limit length) */ 794 void copy_filename(char *dst, const char *src, int size); 795 796 /* get a random source port */ 797 unsigned int random_port(void); 798 799 /* Update U-Boot over TFTP */ 800 int update_tftp(ulong addr); 801 802 /**********************************************************************/ 803 804 #endif /* __NET_H__ */ 805