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 /* 128 * The devname can be either an exact name given by the driver or device tree 129 * or it can be an alias of the form "eth%d" 130 */ 131 struct udevice *eth_get_dev_by_name(const char *devname); 132 unsigned char *eth_get_ethaddr(void); /* get the current device MAC */ 133 /* Used only when NetConsole is enabled */ 134 int eth_init_state_only(void); /* Set active state */ 135 void eth_halt_state_only(void); /* Set passive state */ 136 #endif 137 138 #ifndef CONFIG_DM_ETH 139 struct eth_device { 140 char name[16]; 141 unsigned char enetaddr[6]; 142 phys_addr_t iobase; 143 int state; 144 145 int (*init) (struct eth_device *, bd_t *); 146 int (*send) (struct eth_device *, void *packet, int length); 147 int (*recv) (struct eth_device *); 148 void (*halt) (struct eth_device *); 149 #ifdef CONFIG_MCAST_TFTP 150 int (*mcast) (struct eth_device *, const u8 *enetaddr, u8 set); 151 #endif 152 int (*write_hwaddr) (struct eth_device *); 153 struct eth_device *next; 154 int index; 155 void *priv; 156 }; 157 158 int eth_register(struct eth_device *dev);/* Register network device */ 159 int eth_unregister(struct eth_device *dev);/* Remove network device */ 160 161 extern struct eth_device *eth_current; 162 163 static inline __attribute__((always_inline)) 164 struct eth_device *eth_get_dev(void) 165 { 166 return eth_current; 167 } 168 struct eth_device *eth_get_dev_by_name(const char *devname); 169 struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */ 170 171 /* get the current device MAC */ 172 static inline unsigned char *eth_get_ethaddr(void) 173 { 174 if (eth_current) 175 return eth_current->enetaddr; 176 return NULL; 177 } 178 179 /* Set active state */ 180 static inline __attribute__((always_inline)) int eth_init_state_only(void) 181 { 182 eth_get_dev()->state = ETH_STATE_ACTIVE; 183 184 return 0; 185 } 186 /* Set passive state */ 187 static inline __attribute__((always_inline)) void eth_halt_state_only(void) 188 { 189 eth_get_dev()->state = ETH_STATE_PASSIVE; 190 } 191 192 /* 193 * Set the hardware address for an ethernet interface based on 'eth%daddr' 194 * environment variable (or just 'ethaddr' if eth_number is 0). 195 * Args: 196 * base_name - base name for device (normally "eth") 197 * eth_number - value of %d (0 for first device of this type) 198 * Returns: 199 * 0 is success, non-zero is error status from driver. 200 */ 201 int eth_write_hwaddr(struct eth_device *dev, const char *base_name, 202 int eth_number); 203 204 int usb_eth_initialize(bd_t *bi); 205 #endif 206 207 int eth_initialize(void); /* Initialize network subsystem */ 208 void eth_try_another(int first_restart); /* Change the device */ 209 void eth_set_current(void); /* set nterface to ethcur var */ 210 211 int eth_get_dev_index(void); /* get the device index */ 212 void eth_parse_enetaddr(const char *addr, uchar *enetaddr); 213 int eth_getenv_enetaddr(char *name, uchar *enetaddr); 214 int eth_setenv_enetaddr(char *name, const uchar *enetaddr); 215 216 /* 217 * Get the hardware address for an ethernet interface . 218 * Args: 219 * base_name - base name for device (normally "eth") 220 * index - device index number (0 for first) 221 * enetaddr - returns 6 byte hardware address 222 * Returns: 223 * Return true if the address is valid. 224 */ 225 int eth_getenv_enetaddr_by_index(const char *base_name, int index, 226 uchar *enetaddr); 227 228 int eth_init(void); /* Initialize the device */ 229 int eth_send(void *packet, int length); /* Send a packet */ 230 231 #ifdef CONFIG_API 232 int eth_receive(void *packet, int length); /* Receive a packet*/ 233 extern void (*push_packet)(void *packet, int length); 234 #endif 235 int eth_rx(void); /* Check for received packets */ 236 void eth_halt(void); /* stop SCC */ 237 const char *eth_get_name(void); /* get name of current device */ 238 239 #ifdef CONFIG_MCAST_TFTP 240 int eth_mcast_join(IPaddr_t mcast_addr, int join); 241 u32 ether_crc(size_t len, unsigned char const *p); 242 #endif 243 244 245 /**********************************************************************/ 246 /* 247 * Protocol headers. 248 */ 249 250 /* 251 * Ethernet header 252 */ 253 254 struct ethernet_hdr { 255 uchar et_dest[6]; /* Destination node */ 256 uchar et_src[6]; /* Source node */ 257 ushort et_protlen; /* Protocol or length */ 258 }; 259 260 /* Ethernet header size */ 261 #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr)) 262 263 #define ETH_FCS_LEN 4 /* Octets in the FCS */ 264 265 struct e802_hdr { 266 uchar et_dest[6]; /* Destination node */ 267 uchar et_src[6]; /* Source node */ 268 ushort et_protlen; /* Protocol or length */ 269 uchar et_dsap; /* 802 DSAP */ 270 uchar et_ssap; /* 802 SSAP */ 271 uchar et_ctl; /* 802 control */ 272 uchar et_snap1; /* SNAP */ 273 uchar et_snap2; 274 uchar et_snap3; 275 ushort et_prot; /* 802 protocol */ 276 }; 277 278 /* 802 + SNAP + ethernet header size */ 279 #define E802_HDR_SIZE (sizeof(struct e802_hdr)) 280 281 /* 282 * Virtual LAN Ethernet header 283 */ 284 struct vlan_ethernet_hdr { 285 uchar vet_dest[6]; /* Destination node */ 286 uchar vet_src[6]; /* Source node */ 287 ushort vet_vlan_type; /* PROT_VLAN */ 288 ushort vet_tag; /* TAG of VLAN */ 289 ushort vet_type; /* protocol type */ 290 }; 291 292 /* VLAN Ethernet header size */ 293 #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr)) 294 295 #define PROT_IP 0x0800 /* IP protocol */ 296 #define PROT_ARP 0x0806 /* IP ARP protocol */ 297 #define PROT_RARP 0x8035 /* IP ARP protocol */ 298 #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */ 299 300 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */ 301 #define IPPROTO_UDP 17 /* User Datagram Protocol */ 302 303 /* 304 * Internet Protocol (IP) header. 305 */ 306 struct ip_hdr { 307 uchar ip_hl_v; /* header length and version */ 308 uchar ip_tos; /* type of service */ 309 ushort ip_len; /* total length */ 310 ushort ip_id; /* identification */ 311 ushort ip_off; /* fragment offset field */ 312 uchar ip_ttl; /* time to live */ 313 uchar ip_p; /* protocol */ 314 ushort ip_sum; /* checksum */ 315 IPaddr_t ip_src; /* Source IP address */ 316 IPaddr_t ip_dst; /* Destination IP address */ 317 }; 318 319 #define IP_OFFS 0x1fff /* ip offset *= 8 */ 320 #define IP_FLAGS 0xe000 /* first 3 bits */ 321 #define IP_FLAGS_RES 0x8000 /* reserved */ 322 #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */ 323 #define IP_FLAGS_MFRAG 0x2000 /* more fragments */ 324 325 #define IP_HDR_SIZE (sizeof(struct ip_hdr)) 326 327 /* 328 * Internet Protocol (IP) + UDP header. 329 */ 330 struct ip_udp_hdr { 331 uchar ip_hl_v; /* header length and version */ 332 uchar ip_tos; /* type of service */ 333 ushort ip_len; /* total length */ 334 ushort ip_id; /* identification */ 335 ushort ip_off; /* fragment offset field */ 336 uchar ip_ttl; /* time to live */ 337 uchar ip_p; /* protocol */ 338 ushort ip_sum; /* checksum */ 339 IPaddr_t ip_src; /* Source IP address */ 340 IPaddr_t ip_dst; /* Destination IP address */ 341 ushort udp_src; /* UDP source port */ 342 ushort udp_dst; /* UDP destination port */ 343 ushort udp_len; /* Length of UDP packet */ 344 ushort udp_xsum; /* Checksum */ 345 }; 346 347 #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr)) 348 #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE) 349 350 /* 351 * Address Resolution Protocol (ARP) header. 352 */ 353 struct arp_hdr { 354 ushort ar_hrd; /* Format of hardware address */ 355 # define ARP_ETHER 1 /* Ethernet hardware address */ 356 ushort ar_pro; /* Format of protocol address */ 357 uchar ar_hln; /* Length of hardware address */ 358 # define ARP_HLEN 6 359 uchar ar_pln; /* Length of protocol address */ 360 # define ARP_PLEN 4 361 ushort ar_op; /* Operation */ 362 # define ARPOP_REQUEST 1 /* Request to resolve address */ 363 # define ARPOP_REPLY 2 /* Response to previous request */ 364 365 # define RARPOP_REQUEST 3 /* Request to resolve address */ 366 # define RARPOP_REPLY 4 /* Response to previous request */ 367 368 /* 369 * The remaining fields are variable in size, according to 370 * the sizes above, and are defined as appropriate for 371 * specific hardware/protocol combinations. 372 */ 373 uchar ar_data[0]; 374 #define ar_sha ar_data[0] 375 #define ar_spa ar_data[ARP_HLEN] 376 #define ar_tha ar_data[ARP_HLEN + ARP_PLEN] 377 #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN] 378 #if 0 379 uchar ar_sha[]; /* Sender hardware address */ 380 uchar ar_spa[]; /* Sender protocol address */ 381 uchar ar_tha[]; /* Target hardware address */ 382 uchar ar_tpa[]; /* Target protocol address */ 383 #endif /* 0 */ 384 }; 385 386 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */ 387 388 /* 389 * ICMP stuff (just enough to handle (host) redirect messages) 390 */ 391 #define ICMP_ECHO_REPLY 0 /* Echo reply */ 392 #define ICMP_NOT_REACH 3 /* Detination unreachable */ 393 #define ICMP_REDIRECT 5 /* Redirect (change route) */ 394 #define ICMP_ECHO_REQUEST 8 /* Echo request */ 395 396 /* Codes for REDIRECT. */ 397 #define ICMP_REDIR_NET 0 /* Redirect Net */ 398 #define ICMP_REDIR_HOST 1 /* Redirect Host */ 399 400 /* Codes for NOT_REACH */ 401 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */ 402 403 struct icmp_hdr { 404 uchar type; 405 uchar code; 406 ushort checksum; 407 union { 408 struct { 409 ushort id; 410 ushort sequence; 411 } echo; 412 ulong gateway; 413 struct { 414 ushort unused; 415 ushort mtu; 416 } frag; 417 uchar data[0]; 418 } un; 419 }; 420 421 #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr)) 422 #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE) 423 424 /* 425 * Maximum packet size; used to allocate packet storage. 426 * TFTP packets can be 524 bytes + IP header + ethernet header. 427 * Lets be conservative, and go for 38 * 16. (Must also be 428 * a multiple of 32 bytes). 429 */ 430 /* 431 * AS.HARNOIS : Better to set PKTSIZE to maximum size because 432 * traffic type is not always controlled 433 * maximum packet size = 1518 434 * maximum packet size and multiple of 32 bytes = 1536 435 */ 436 #define PKTSIZE 1518 437 #define PKTSIZE_ALIGN 1536 438 /*#define PKTSIZE 608*/ 439 440 /* 441 * Maximum receive ring size; that is, the number of packets 442 * we can buffer before overflow happens. Basically, this just 443 * needs to be enough to prevent a packet being discarded while 444 * we are processing the previous one. 445 */ 446 #define RINGSZ 4 447 #define RINGSZ_LOG2 2 448 449 /**********************************************************************/ 450 /* 451 * Globals. 452 * 453 * Note: 454 * 455 * All variables of type IPaddr_t are stored in NETWORK byte order 456 * (big endian). 457 */ 458 459 /* net.c */ 460 /** BOOTP EXTENTIONS **/ 461 extern IPaddr_t NetOurGatewayIP; /* Our gateway IP address */ 462 extern IPaddr_t NetOurSubnetMask; /* Our subnet mask (0 = unknown) */ 463 extern IPaddr_t NetOurDNSIP; /* Our Domain Name Server (0 = unknown) */ 464 #if defined(CONFIG_BOOTP_DNS2) 465 extern IPaddr_t NetOurDNS2IP; /* Our 2nd Domain Name Server (0 = unknown) */ 466 #endif 467 extern char NetOurNISDomain[32]; /* Our NIS domain */ 468 extern char NetOurHostName[32]; /* Our hostname */ 469 extern char NetOurRootPath[64]; /* Our root path */ 470 extern ushort NetBootFileSize; /* Our boot file size in blocks */ 471 /** END OF BOOTP EXTENTIONS **/ 472 extern ulong NetBootFileXferSize; /* size of bootfile in bytes */ 473 extern uchar NetOurEther[6]; /* Our ethernet address */ 474 extern uchar NetServerEther[6]; /* Boot server enet address */ 475 extern IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */ 476 extern IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */ 477 extern uchar *NetTxPacket; /* THE transmit packet */ 478 #ifdef CONFIG_DM_ETH 479 extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */ 480 #else 481 extern uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */ 482 #endif 483 extern uchar *NetRxPacket; /* Current receive packet */ 484 extern int NetRxPacketLen; /* Current rx packet length */ 485 extern unsigned NetIPID; /* IP ID (counting) */ 486 extern uchar NetBcastAddr[6]; /* Ethernet boardcast address */ 487 extern uchar NetEtherNullAddr[6]; 488 489 #define VLAN_NONE 4095 /* untagged */ 490 #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */ 491 extern ushort NetOurVLAN; /* Our VLAN */ 492 extern ushort NetOurNativeVLAN; /* Our Native VLAN */ 493 494 extern int NetRestartWrap; /* Tried all network devices */ 495 496 enum proto_t { 497 BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP, 498 TFTPSRV, TFTPPUT, LINKLOCAL 499 }; 500 501 /* from net/net.c */ 502 extern char BootFile[128]; /* Boot File name */ 503 504 #if defined(CONFIG_CMD_DNS) 505 extern char *NetDNSResolve; /* The host to resolve */ 506 extern char *NetDNSenvvar; /* the env var to put the ip into */ 507 #endif 508 509 #if defined(CONFIG_CMD_PING) 510 extern IPaddr_t NetPingIP; /* the ip address to ping */ 511 #endif 512 513 #if defined(CONFIG_CMD_CDP) 514 /* when CDP completes these hold the return values */ 515 extern ushort CDPNativeVLAN; /* CDP returned native VLAN */ 516 extern ushort CDPApplianceVLAN; /* CDP returned appliance VLAN */ 517 518 /* 519 * Check for a CDP packet by examining the received MAC address field 520 */ 521 static inline int is_cdp_packet(const uchar *et_addr) 522 { 523 extern const uchar NetCDPAddr[6]; 524 525 return memcmp(et_addr, NetCDPAddr, 6) == 0; 526 } 527 #endif 528 529 #if defined(CONFIG_CMD_SNTP) 530 extern IPaddr_t NetNtpServerIP; /* the ip address to NTP */ 531 extern int NetTimeOffset; /* offset time from UTC */ 532 #endif 533 534 #if defined(CONFIG_MCAST_TFTP) 535 extern IPaddr_t Mcast_addr; 536 #endif 537 538 /* Initialize the network adapter */ 539 void net_init(void); 540 int NetLoop(enum proto_t); 541 542 /* Shutdown adapters and cleanup */ 543 void NetStop(void); 544 545 /* Load failed. Start again. */ 546 int NetStartAgain(void); 547 548 /* Get size of the ethernet header when we send */ 549 int NetEthHdrSize(void); 550 551 /* Set ethernet header; returns the size of the header */ 552 int NetSetEther(uchar *, uchar *, uint); 553 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot); 554 555 /* Set IP header */ 556 void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source); 557 void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport, 558 int sport, int len); 559 560 /** 561 * compute_ip_checksum() - Compute IP checksum 562 * 563 * @addr: Address to check (must be 16-bit aligned) 564 * @nbytes: Number of bytes to check (normally a multiple of 2) 565 * @return 16-bit IP checksum 566 */ 567 unsigned compute_ip_checksum(const void *addr, unsigned nbytes); 568 569 /** 570 * add_ip_checksums() - add two IP checksums 571 * 572 * @offset: Offset of first sum (if odd we do a byte-swap) 573 * @sum: First checksum 574 * @new_sum: New checksum to add 575 * @return updated 16-bit IP checksum 576 */ 577 unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum); 578 579 /** 580 * ip_checksum_ok() - check if a checksum is correct 581 * 582 * This works by making sure the checksum sums to 0 583 * 584 * @addr: Address to check (must be 16-bit aligned) 585 * @nbytes: Number of bytes to check (normally a multiple of 2) 586 * @return true if the checksum matches, false if not 587 */ 588 int ip_checksum_ok(const void *addr, unsigned nbytes); 589 590 /* Callbacks */ 591 rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */ 592 void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */ 593 rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */ 594 void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */ 595 void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */ 596 void NetSetTimeout(ulong, thand_f *);/* Set timeout handler */ 597 598 /* Network loop state */ 599 enum net_loop_state { 600 NETLOOP_CONTINUE, 601 NETLOOP_RESTART, 602 NETLOOP_SUCCESS, 603 NETLOOP_FAIL 604 }; 605 extern enum net_loop_state net_state; 606 607 static inline void net_set_state(enum net_loop_state state) 608 { 609 debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state); 610 net_state = state; 611 } 612 613 /* Transmit a packet */ 614 static inline void NetSendPacket(uchar *pkt, int len) 615 { 616 /* Currently no way to return errors from eth_send() */ 617 (void) eth_send(pkt, len); 618 } 619 620 /* 621 * Transmit "NetTxPacket" as UDP packet, performing ARP request if needed 622 * (ether will be populated) 623 * 624 * @param ether Raw packet buffer 625 * @param dest IP address to send the datagram to 626 * @param dport Destination UDP port 627 * @param sport Source UDP port 628 * @param payload_len Length of data after the UDP header 629 */ 630 int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, 631 int sport, int payload_len); 632 633 #ifndef CONFIG_DM_ETH 634 #define NetReceive(in_packet, len) net_process_received_packet(in_packet, len) 635 #endif 636 /* Processes a received packet */ 637 void net_process_received_packet(uchar *in_packet, int len); 638 639 #ifdef CONFIG_NETCONSOLE 640 void NcStart(void); 641 int nc_input_packet(uchar *pkt, IPaddr_t src_ip, unsigned dest_port, 642 unsigned src_port, unsigned len); 643 #endif 644 645 static inline __attribute__((always_inline)) int eth_is_on_demand_init(void) 646 { 647 #ifdef CONFIG_NETCONSOLE 648 extern enum proto_t net_loop_last_protocol; 649 650 return net_loop_last_protocol != NETCONS; 651 #else 652 return 1; 653 #endif 654 } 655 656 static inline void eth_set_last_protocol(int protocol) 657 { 658 #ifdef CONFIG_NETCONSOLE 659 extern enum proto_t net_loop_last_protocol; 660 661 net_loop_last_protocol = protocol; 662 #endif 663 } 664 665 /* 666 * Check if autoload is enabled. If so, use either NFS or TFTP to download 667 * the boot file. 668 */ 669 void net_auto_load(void); 670 671 /* 672 * The following functions are a bit ugly, but necessary to deal with 673 * alignment restrictions on ARM. 674 * 675 * We're using inline functions, which had the smallest memory 676 * footprint in our tests. 677 */ 678 /* return IP *in network byteorder* */ 679 static inline IPaddr_t NetReadIP(void *from) 680 { 681 IPaddr_t ip; 682 683 memcpy((void *)&ip, (void *)from, sizeof(ip)); 684 return ip; 685 } 686 687 /* return ulong *in network byteorder* */ 688 static inline ulong NetReadLong(ulong *from) 689 { 690 ulong l; 691 692 memcpy((void *)&l, (void *)from, sizeof(l)); 693 return l; 694 } 695 696 /* write IP *in network byteorder* */ 697 static inline void NetWriteIP(void *to, IPaddr_t ip) 698 { 699 memcpy(to, (void *)&ip, sizeof(ip)); 700 } 701 702 /* copy IP */ 703 static inline void NetCopyIP(void *to, void *from) 704 { 705 memcpy((void *)to, from, sizeof(IPaddr_t)); 706 } 707 708 /* copy ulong */ 709 static inline void NetCopyLong(ulong *to, ulong *from) 710 { 711 memcpy((void *)to, (void *)from, sizeof(ulong)); 712 } 713 714 /** 715 * is_zero_ether_addr - Determine if give Ethernet address is all zeros. 716 * @addr: Pointer to a six-byte array containing the Ethernet address 717 * 718 * Return true if the address is all zeroes. 719 */ 720 static inline int is_zero_ether_addr(const u8 *addr) 721 { 722 return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]); 723 } 724 725 /** 726 * is_multicast_ether_addr - Determine if the Ethernet address is a multicast. 727 * @addr: Pointer to a six-byte array containing the Ethernet address 728 * 729 * Return true if the address is a multicast address. 730 * By definition the broadcast address is also a multicast address. 731 */ 732 static inline int is_multicast_ether_addr(const u8 *addr) 733 { 734 return 0x01 & addr[0]; 735 } 736 737 /* 738 * is_broadcast_ether_addr - Determine if the Ethernet address is broadcast 739 * @addr: Pointer to a six-byte array containing the Ethernet address 740 * 741 * Return true if the address is the broadcast address. 742 */ 743 static inline int is_broadcast_ether_addr(const u8 *addr) 744 { 745 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 746 0xff; 747 } 748 749 /* 750 * is_valid_ether_addr - Determine if the given Ethernet address is valid 751 * @addr: Pointer to a six-byte array containing the Ethernet address 752 * 753 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not 754 * a multicast address, and is not FF:FF:FF:FF:FF:FF. 755 * 756 * Return true if the address is valid. 757 */ 758 static inline int is_valid_ether_addr(const u8 *addr) 759 { 760 /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to 761 * explicitly check for it here. */ 762 return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr); 763 } 764 765 /** 766 * eth_random_addr - Generate software assigned random Ethernet address 767 * @addr: Pointer to a six-byte array containing the Ethernet address 768 * 769 * Generate a random Ethernet address (MAC) that is not multicast 770 * and has the local assigned bit set. 771 */ 772 static inline void eth_random_addr(uchar *addr) 773 { 774 int i; 775 unsigned int seed = get_timer(0); 776 777 for (i = 0; i < 6; i++) 778 addr[i] = rand_r(&seed); 779 780 addr[0] &= 0xfe; /* clear multicast bit */ 781 addr[0] |= 0x02; /* set local assignment bit (IEEE802) */ 782 } 783 784 /* Convert an IP address to a string */ 785 void ip_to_string(IPaddr_t x, char *s); 786 787 /* Convert a string to ip address */ 788 IPaddr_t string_to_ip(const char *s); 789 790 /* Convert a VLAN id to a string */ 791 void VLAN_to_string(ushort x, char *s); 792 793 /* Convert a string to a vlan id */ 794 ushort string_to_VLAN(const char *s); 795 796 /* read a VLAN id from an environment variable */ 797 ushort getenv_VLAN(char *); 798 799 /* copy a filename (allow for "..." notation, limit length) */ 800 void copy_filename(char *dst, const char *src, int size); 801 802 /* get a random source port */ 803 unsigned int random_port(void); 804 805 /* Update U-Boot over TFTP */ 806 int update_tftp(ulong addr); 807 808 /**********************************************************************/ 809 810 #endif /* __NET_H__ */ 811