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 struct in_addr { 43 __be32 s_addr; 44 }; 45 46 /** 47 * An incoming packet handler. 48 * @param pkt pointer to the application packet 49 * @param dport destination UDP port 50 * @param sip source IP address 51 * @param sport source UDP port 52 * @param len packet length 53 */ 54 typedef void rxhand_f(uchar *pkt, unsigned dport, 55 struct in_addr sip, unsigned sport, 56 unsigned len); 57 58 /** 59 * An incoming ICMP packet handler. 60 * @param type ICMP type 61 * @param code ICMP code 62 * @param dport destination UDP port 63 * @param sip source IP address 64 * @param sport source UDP port 65 * @param pkt pointer to the ICMP packet data 66 * @param len packet length 67 */ 68 typedef void rxhand_icmp_f(unsigned type, unsigned code, unsigned dport, 69 struct in_addr sip, unsigned sport, uchar *pkt, unsigned len); 70 71 /* 72 * A timeout handler. Called after time interval has expired. 73 */ 74 typedef void thand_f(void); 75 76 enum eth_state_t { 77 ETH_STATE_INIT, 78 ETH_STATE_PASSIVE, 79 ETH_STATE_ACTIVE 80 }; 81 82 #ifdef CONFIG_DM_ETH 83 /** 84 * struct eth_pdata - Platform data for Ethernet MAC controllers 85 * 86 * @iobase: The base address of the hardware registers 87 * @enetaddr: The Ethernet MAC address that is loaded from EEPROM or env 88 * @phy_interface: PHY interface to use - see PHY_INTERFACE_MODE_... 89 */ 90 struct eth_pdata { 91 phys_addr_t iobase; 92 unsigned char enetaddr[6]; 93 int phy_interface; 94 }; 95 96 enum eth_recv_flags { 97 /* 98 * Check hardware device for new packets (otherwise only return those 99 * which are already in the memory buffer ready to process) 100 */ 101 ETH_RECV_CHECK_DEVICE = 1 << 0, 102 }; 103 104 /** 105 * struct eth_ops - functions of Ethernet MAC controllers 106 * 107 * start: Prepare the hardware to send and receive packets 108 * send: Send the bytes passed in "packet" as a packet on the wire 109 * recv: Check if the hardware received a packet. If so, set the pointer to the 110 * packet buffer in the packetp parameter. If not, return an error or 0 to 111 * indicate that the hardware receive FIFO is empty. If 0 is returned, the 112 * network stack will not process the empty packet, but free_pkt() will be 113 * called if supplied 114 * free_pkt: Give the driver an opportunity to manage its packet buffer memory 115 * when the network stack is finished processing it. This will only be 116 * called when no error was returned from recv - optional 117 * stop: Stop the hardware from looking for packets - may be called even if 118 * state == PASSIVE 119 * mcast: Join or leave a multicast group (for TFTP) - optional 120 * write_hwaddr: Write a MAC address to the hardware (used to pass it to Linux 121 * on some platforms like ARM). This function expects the 122 * eth_pdata::enetaddr field to be populated. The method can 123 * return -ENOSYS to indicate that this is not implemented for 124 this hardware - optional. 125 * read_rom_hwaddr: Some devices have a backup of the MAC address stored in a 126 * ROM on the board. This is how the driver should expose it 127 * to the network stack. This function should fill in the 128 * eth_pdata::enetaddr field - optional 129 */ 130 struct eth_ops { 131 int (*start)(struct udevice *dev); 132 int (*send)(struct udevice *dev, void *packet, int length); 133 int (*recv)(struct udevice *dev, int flags, uchar **packetp); 134 int (*free_pkt)(struct udevice *dev, uchar *packet, int length); 135 void (*stop)(struct udevice *dev); 136 #ifdef CONFIG_MCAST_TFTP 137 int (*mcast)(struct udevice *dev, const u8 *enetaddr, int join); 138 #endif 139 int (*write_hwaddr)(struct udevice *dev); 140 int (*read_rom_hwaddr)(struct udevice *dev); 141 }; 142 143 #define eth_get_ops(dev) ((struct eth_ops *)(dev)->driver->ops) 144 145 struct udevice *eth_get_dev(void); /* get the current device */ 146 /* 147 * The devname can be either an exact name given by the driver or device tree 148 * or it can be an alias of the form "eth%d" 149 */ 150 struct udevice *eth_get_dev_by_name(const char *devname); 151 unsigned char *eth_get_ethaddr(void); /* get the current device MAC */ 152 /* Used only when NetConsole is enabled */ 153 int eth_init_state_only(void); /* Set active state */ 154 void eth_halt_state_only(void); /* Set passive state */ 155 #endif 156 157 #ifndef CONFIG_DM_ETH 158 struct eth_device { 159 char name[16]; 160 unsigned char enetaddr[6]; 161 phys_addr_t iobase; 162 int state; 163 164 int (*init)(struct eth_device *, bd_t *); 165 int (*send)(struct eth_device *, void *packet, int length); 166 int (*recv)(struct eth_device *); 167 void (*halt)(struct eth_device *); 168 #ifdef CONFIG_MCAST_TFTP 169 int (*mcast)(struct eth_device *, const u8 *enetaddr, u8 set); 170 #endif 171 int (*write_hwaddr)(struct eth_device *); 172 struct eth_device *next; 173 int index; 174 void *priv; 175 }; 176 177 int eth_register(struct eth_device *dev);/* Register network device */ 178 int eth_unregister(struct eth_device *dev);/* Remove network device */ 179 180 extern struct eth_device *eth_current; 181 182 static inline __attribute__((always_inline)) 183 struct eth_device *eth_get_dev(void) 184 { 185 return eth_current; 186 } 187 struct eth_device *eth_get_dev_by_name(const char *devname); 188 struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */ 189 190 /* get the current device MAC */ 191 static inline unsigned char *eth_get_ethaddr(void) 192 { 193 if (eth_current) 194 return eth_current->enetaddr; 195 return NULL; 196 } 197 198 /* Set active state */ 199 static inline __attribute__((always_inline)) int eth_init_state_only(void) 200 { 201 eth_get_dev()->state = ETH_STATE_ACTIVE; 202 203 return 0; 204 } 205 /* Set passive state */ 206 static inline __attribute__((always_inline)) void eth_halt_state_only(void) 207 { 208 eth_get_dev()->state = ETH_STATE_PASSIVE; 209 } 210 211 /* 212 * Set the hardware address for an ethernet interface based on 'eth%daddr' 213 * environment variable (or just 'ethaddr' if eth_number is 0). 214 * Args: 215 * base_name - base name for device (normally "eth") 216 * eth_number - value of %d (0 for first device of this type) 217 * Returns: 218 * 0 is success, non-zero is error status from driver. 219 */ 220 int eth_write_hwaddr(struct eth_device *dev, const char *base_name, 221 int eth_number); 222 223 int usb_eth_initialize(bd_t *bi); 224 #endif 225 226 int eth_initialize(void); /* Initialize network subsystem */ 227 void eth_try_another(int first_restart); /* Change the device */ 228 void eth_set_current(void); /* set nterface to ethcur var */ 229 230 int eth_get_dev_index(void); /* get the device index */ 231 void eth_parse_enetaddr(const char *addr, uchar *enetaddr); 232 int eth_getenv_enetaddr(char *name, uchar *enetaddr); 233 int eth_setenv_enetaddr(char *name, const uchar *enetaddr); 234 235 /* 236 * Get the hardware address for an ethernet interface . 237 * Args: 238 * base_name - base name for device (normally "eth") 239 * index - device index number (0 for first) 240 * enetaddr - returns 6 byte hardware address 241 * Returns: 242 * Return true if the address is valid. 243 */ 244 int eth_getenv_enetaddr_by_index(const char *base_name, int index, 245 uchar *enetaddr); 246 247 int eth_init(void); /* Initialize the device */ 248 int eth_send(void *packet, int length); /* Send a packet */ 249 250 #ifdef CONFIG_API 251 int eth_receive(void *packet, int length); /* Receive a packet*/ 252 extern void (*push_packet)(void *packet, int length); 253 #endif 254 int eth_rx(void); /* Check for received packets */ 255 void eth_halt(void); /* stop SCC */ 256 const char *eth_get_name(void); /* get name of current device */ 257 258 #ifdef CONFIG_MCAST_TFTP 259 int eth_mcast_join(struct in_addr mcast_addr, int join); 260 u32 ether_crc(size_t len, unsigned char const *p); 261 #endif 262 263 264 /**********************************************************************/ 265 /* 266 * Protocol headers. 267 */ 268 269 /* 270 * Ethernet header 271 */ 272 273 struct ethernet_hdr { 274 u8 et_dest[6]; /* Destination node */ 275 u8 et_src[6]; /* Source node */ 276 u16 et_protlen; /* Protocol or length */ 277 }; 278 279 /* Ethernet header size */ 280 #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr)) 281 282 #define ETH_FCS_LEN 4 /* Octets in the FCS */ 283 284 struct e802_hdr { 285 u8 et_dest[6]; /* Destination node */ 286 u8 et_src[6]; /* Source node */ 287 u16 et_protlen; /* Protocol or length */ 288 u8 et_dsap; /* 802 DSAP */ 289 u8 et_ssap; /* 802 SSAP */ 290 u8 et_ctl; /* 802 control */ 291 u8 et_snap1; /* SNAP */ 292 u8 et_snap2; 293 u8 et_snap3; 294 u16 et_prot; /* 802 protocol */ 295 }; 296 297 /* 802 + SNAP + ethernet header size */ 298 #define E802_HDR_SIZE (sizeof(struct e802_hdr)) 299 300 /* 301 * Virtual LAN Ethernet header 302 */ 303 struct vlan_ethernet_hdr { 304 u8 vet_dest[6]; /* Destination node */ 305 u8 vet_src[6]; /* Source node */ 306 u16 vet_vlan_type; /* PROT_VLAN */ 307 u16 vet_tag; /* TAG of VLAN */ 308 u16 vet_type; /* protocol type */ 309 }; 310 311 /* VLAN Ethernet header size */ 312 #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr)) 313 314 #define PROT_IP 0x0800 /* IP protocol */ 315 #define PROT_ARP 0x0806 /* IP ARP protocol */ 316 #define PROT_RARP 0x8035 /* IP ARP protocol */ 317 #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */ 318 319 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */ 320 #define IPPROTO_UDP 17 /* User Datagram Protocol */ 321 322 /* 323 * Internet Protocol (IP) header. 324 */ 325 struct ip_hdr { 326 u8 ip_hl_v; /* header length and version */ 327 u8 ip_tos; /* type of service */ 328 u16 ip_len; /* total length */ 329 u16 ip_id; /* identification */ 330 u16 ip_off; /* fragment offset field */ 331 u8 ip_ttl; /* time to live */ 332 u8 ip_p; /* protocol */ 333 u16 ip_sum; /* checksum */ 334 struct in_addr ip_src; /* Source IP address */ 335 struct in_addr ip_dst; /* Destination IP address */ 336 }; 337 338 #define IP_OFFS 0x1fff /* ip offset *= 8 */ 339 #define IP_FLAGS 0xe000 /* first 3 bits */ 340 #define IP_FLAGS_RES 0x8000 /* reserved */ 341 #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */ 342 #define IP_FLAGS_MFRAG 0x2000 /* more fragments */ 343 344 #define IP_HDR_SIZE (sizeof(struct ip_hdr)) 345 346 /* 347 * Internet Protocol (IP) + UDP header. 348 */ 349 struct ip_udp_hdr { 350 u8 ip_hl_v; /* header length and version */ 351 u8 ip_tos; /* type of service */ 352 u16 ip_len; /* total length */ 353 u16 ip_id; /* identification */ 354 u16 ip_off; /* fragment offset field */ 355 u8 ip_ttl; /* time to live */ 356 u8 ip_p; /* protocol */ 357 u16 ip_sum; /* checksum */ 358 struct in_addr ip_src; /* Source IP address */ 359 struct in_addr ip_dst; /* Destination IP address */ 360 u16 udp_src; /* UDP source port */ 361 u16 udp_dst; /* UDP destination port */ 362 u16 udp_len; /* Length of UDP packet */ 363 u16 udp_xsum; /* Checksum */ 364 }; 365 366 #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr)) 367 #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE) 368 369 /* 370 * Address Resolution Protocol (ARP) header. 371 */ 372 struct arp_hdr { 373 u16 ar_hrd; /* Format of hardware address */ 374 # define ARP_ETHER 1 /* Ethernet hardware address */ 375 u16 ar_pro; /* Format of protocol address */ 376 u8 ar_hln; /* Length of hardware address */ 377 # define ARP_HLEN 6 378 u8 ar_pln; /* Length of protocol address */ 379 # define ARP_PLEN 4 380 u16 ar_op; /* Operation */ 381 # define ARPOP_REQUEST 1 /* Request to resolve address */ 382 # define ARPOP_REPLY 2 /* Response to previous request */ 383 384 # define RARPOP_REQUEST 3 /* Request to resolve address */ 385 # define RARPOP_REPLY 4 /* Response to previous request */ 386 387 /* 388 * The remaining fields are variable in size, according to 389 * the sizes above, and are defined as appropriate for 390 * specific hardware/protocol combinations. 391 */ 392 u8 ar_data[0]; 393 #define ar_sha ar_data[0] 394 #define ar_spa ar_data[ARP_HLEN] 395 #define ar_tha ar_data[ARP_HLEN + ARP_PLEN] 396 #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN] 397 #if 0 398 u8 ar_sha[]; /* Sender hardware address */ 399 u8 ar_spa[]; /* Sender protocol address */ 400 u8 ar_tha[]; /* Target hardware address */ 401 u8 ar_tpa[]; /* Target protocol address */ 402 #endif /* 0 */ 403 }; 404 405 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */ 406 407 /* 408 * ICMP stuff (just enough to handle (host) redirect messages) 409 */ 410 #define ICMP_ECHO_REPLY 0 /* Echo reply */ 411 #define ICMP_NOT_REACH 3 /* Detination unreachable */ 412 #define ICMP_REDIRECT 5 /* Redirect (change route) */ 413 #define ICMP_ECHO_REQUEST 8 /* Echo request */ 414 415 /* Codes for REDIRECT. */ 416 #define ICMP_REDIR_NET 0 /* Redirect Net */ 417 #define ICMP_REDIR_HOST 1 /* Redirect Host */ 418 419 /* Codes for NOT_REACH */ 420 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */ 421 422 struct icmp_hdr { 423 u8 type; 424 u8 code; 425 u16 checksum; 426 union { 427 struct { 428 u16 id; 429 u16 sequence; 430 } echo; 431 u32 gateway; 432 struct { 433 u16 unused; 434 u16 mtu; 435 } frag; 436 u8 data[0]; 437 } un; 438 }; 439 440 #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr)) 441 #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE) 442 443 /* 444 * Maximum packet size; used to allocate packet storage. 445 * TFTP packets can be 524 bytes + IP header + ethernet header. 446 * Lets be conservative, and go for 38 * 16. (Must also be 447 * a multiple of 32 bytes). 448 */ 449 /* 450 * AS.HARNOIS : Better to set PKTSIZE to maximum size because 451 * traffic type is not always controlled 452 * maximum packet size = 1518 453 * maximum packet size and multiple of 32 bytes = 1536 454 */ 455 #define PKTSIZE 1518 456 #define PKTSIZE_ALIGN 1536 457 /*#define PKTSIZE 608*/ 458 459 /* 460 * Maximum receive ring size; that is, the number of packets 461 * we can buffer before overflow happens. Basically, this just 462 * needs to be enough to prevent a packet being discarded while 463 * we are processing the previous one. 464 */ 465 #define RINGSZ 4 466 #define RINGSZ_LOG2 2 467 468 /**********************************************************************/ 469 /* 470 * Globals. 471 * 472 * Note: 473 * 474 * All variables of type struct in_addr are stored in NETWORK byte order 475 * (big endian). 476 */ 477 478 /* net.c */ 479 /** BOOTP EXTENTIONS **/ 480 extern struct in_addr net_gateway; /* Our gateway IP address */ 481 extern struct in_addr net_netmask; /* Our subnet mask (0 = unknown) */ 482 /* Our Domain Name Server (0 = unknown) */ 483 extern struct in_addr net_dns_server; 484 #if defined(CONFIG_BOOTP_DNS2) 485 /* Our 2nd Domain Name Server (0 = unknown) */ 486 extern struct in_addr net_dns_server2; 487 #endif 488 extern char net_nis_domain[32]; /* Our IS domain */ 489 extern char net_hostname[32]; /* Our hostname */ 490 extern char net_root_path[64]; /* Our root path */ 491 /** END OF BOOTP EXTENTIONS **/ 492 extern u8 net_ethaddr[6]; /* Our ethernet address */ 493 extern u8 net_server_ethaddr[6]; /* Boot server enet address */ 494 extern struct in_addr net_ip; /* Our IP addr (0 = unknown) */ 495 extern struct in_addr net_server_ip; /* Server IP addr (0 = unknown) */ 496 extern uchar *net_tx_packet; /* THE transmit packet */ 497 extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */ 498 extern uchar *net_rx_packet; /* Current receive packet */ 499 extern int net_rx_packet_len; /* Current rx packet length */ 500 extern const u8 net_bcast_ethaddr[6]; /* Ethernet broadcast address */ 501 extern const u8 net_null_ethaddr[6]; 502 503 #define VLAN_NONE 4095 /* untagged */ 504 #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */ 505 extern ushort net_our_vlan; /* Our VLAN */ 506 extern ushort net_native_vlan; /* Our Native VLAN */ 507 508 extern int net_restart_wrap; /* Tried all network devices */ 509 510 enum proto_t { 511 BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP, 512 TFTPSRV, TFTPPUT, LINKLOCAL 513 }; 514 515 extern char net_boot_file_name[128];/* Boot File name */ 516 /* The actual transferred size of the bootfile (in bytes) */ 517 extern u32 net_boot_file_size; 518 /* Boot file size in blocks as reported by the DHCP server */ 519 extern u32 net_boot_file_expected_size_in_blocks; 520 521 #if defined(CONFIG_CMD_DNS) 522 extern char *net_dns_resolve; /* The host to resolve */ 523 extern char *net_dns_env_var; /* the env var to put the ip into */ 524 #endif 525 526 #if defined(CONFIG_CMD_PING) 527 extern struct in_addr net_ping_ip; /* the ip address to ping */ 528 #endif 529 530 #if defined(CONFIG_CMD_CDP) 531 /* when CDP completes these hold the return values */ 532 extern ushort cdp_native_vlan; /* CDP returned native VLAN */ 533 extern ushort cdp_appliance_vlan; /* CDP returned appliance VLAN */ 534 535 /* 536 * Check for a CDP packet by examining the received MAC address field 537 */ 538 static inline int is_cdp_packet(const uchar *ethaddr) 539 { 540 extern const u8 net_cdp_ethaddr[6]; 541 542 return memcmp(ethaddr, net_cdp_ethaddr, 6) == 0; 543 } 544 #endif 545 546 #if defined(CONFIG_CMD_SNTP) 547 extern struct in_addr net_ntp_server; /* the ip address to NTP */ 548 extern int net_ntp_time_offset; /* offset time from UTC */ 549 #endif 550 551 #if defined(CONFIG_MCAST_TFTP) 552 extern struct in_addr net_mcast_addr; 553 #endif 554 555 /* Initialize the network adapter */ 556 void net_init(void); 557 int net_loop(enum proto_t); 558 559 /* Load failed. Start again. */ 560 int net_start_again(void); 561 562 /* Get size of the ethernet header when we send */ 563 int net_eth_hdr_size(void); 564 565 /* Set ethernet header; returns the size of the header */ 566 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot); 567 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot); 568 569 /* Set IP header */ 570 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source); 571 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport, 572 int sport, int len); 573 574 /** 575 * compute_ip_checksum() - Compute IP checksum 576 * 577 * @addr: Address to check (must be 16-bit aligned) 578 * @nbytes: Number of bytes to check (normally a multiple of 2) 579 * @return 16-bit IP checksum 580 */ 581 unsigned compute_ip_checksum(const void *addr, unsigned nbytes); 582 583 /** 584 * add_ip_checksums() - add two IP checksums 585 * 586 * @offset: Offset of first sum (if odd we do a byte-swap) 587 * @sum: First checksum 588 * @new_sum: New checksum to add 589 * @return updated 16-bit IP checksum 590 */ 591 unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum); 592 593 /** 594 * ip_checksum_ok() - check if a checksum is correct 595 * 596 * This works by making sure the checksum sums to 0 597 * 598 * @addr: Address to check (must be 16-bit aligned) 599 * @nbytes: Number of bytes to check (normally a multiple of 2) 600 * @return true if the checksum matches, false if not 601 */ 602 int ip_checksum_ok(const void *addr, unsigned nbytes); 603 604 /* Callbacks */ 605 rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */ 606 void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */ 607 rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */ 608 void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */ 609 void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */ 610 void net_set_timeout_handler(ulong, thand_f *);/* Set timeout handler */ 611 612 /* Network loop state */ 613 enum net_loop_state { 614 NETLOOP_CONTINUE, 615 NETLOOP_RESTART, 616 NETLOOP_SUCCESS, 617 NETLOOP_FAIL 618 }; 619 extern enum net_loop_state net_state; 620 621 static inline void net_set_state(enum net_loop_state state) 622 { 623 debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state); 624 net_state = state; 625 } 626 627 /* Transmit a packet */ 628 static inline void net_send_packet(uchar *pkt, int len) 629 { 630 /* Currently no way to return errors from eth_send() */ 631 (void) eth_send(pkt, len); 632 } 633 634 /* 635 * Transmit "net_tx_packet" as UDP packet, performing ARP request if needed 636 * (ether will be populated) 637 * 638 * @param ether Raw packet buffer 639 * @param dest IP address to send the datagram to 640 * @param dport Destination UDP port 641 * @param sport Source UDP port 642 * @param payload_len Length of data after the UDP header 643 */ 644 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport, 645 int sport, int payload_len); 646 647 /* Processes a received packet */ 648 void net_process_received_packet(uchar *in_packet, int len); 649 650 #ifdef CONFIG_NETCONSOLE 651 void nc_start(void); 652 int nc_input_packet(uchar *pkt, struct in_addr src_ip, unsigned dest_port, 653 unsigned src_port, unsigned len); 654 #endif 655 656 static inline __attribute__((always_inline)) int eth_is_on_demand_init(void) 657 { 658 #ifdef CONFIG_NETCONSOLE 659 extern enum proto_t net_loop_last_protocol; 660 661 return net_loop_last_protocol != NETCONS; 662 #else 663 return 1; 664 #endif 665 } 666 667 static inline void eth_set_last_protocol(int protocol) 668 { 669 #ifdef CONFIG_NETCONSOLE 670 extern enum proto_t net_loop_last_protocol; 671 672 net_loop_last_protocol = protocol; 673 #endif 674 } 675 676 /* 677 * Check if autoload is enabled. If so, use either NFS or TFTP to download 678 * the boot file. 679 */ 680 void net_auto_load(void); 681 682 /* 683 * The following functions are a bit ugly, but necessary to deal with 684 * alignment restrictions on ARM. 685 * 686 * We're using inline functions, which had the smallest memory 687 * footprint in our tests. 688 */ 689 /* return IP *in network byteorder* */ 690 static inline struct in_addr net_read_ip(void *from) 691 { 692 struct in_addr ip; 693 694 memcpy((void *)&ip, (void *)from, sizeof(ip)); 695 return ip; 696 } 697 698 /* return ulong *in network byteorder* */ 699 static inline u32 net_read_u32(u32 *from) 700 { 701 u32 l; 702 703 memcpy((void *)&l, (void *)from, sizeof(l)); 704 return l; 705 } 706 707 /* write IP *in network byteorder* */ 708 static inline void net_write_ip(void *to, struct in_addr ip) 709 { 710 memcpy(to, (void *)&ip, sizeof(ip)); 711 } 712 713 /* copy IP */ 714 static inline void net_copy_ip(void *to, void *from) 715 { 716 memcpy((void *)to, from, sizeof(struct in_addr)); 717 } 718 719 /* copy ulong */ 720 static inline void net_copy_u32(u32 *to, u32 *from) 721 { 722 memcpy((void *)to, (void *)from, sizeof(u32)); 723 } 724 725 /** 726 * is_zero_ethaddr - Determine if give Ethernet address is all zeros. 727 * @addr: Pointer to a six-byte array containing the Ethernet address 728 * 729 * Return true if the address is all zeroes. 730 */ 731 static inline int is_zero_ethaddr(const u8 *addr) 732 { 733 return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]); 734 } 735 736 /** 737 * is_multicast_ethaddr - Determine if the Ethernet address is a multicast. 738 * @addr: Pointer to a six-byte array containing the Ethernet address 739 * 740 * Return true if the address is a multicast address. 741 * By definition the broadcast address is also a multicast address. 742 */ 743 static inline int is_multicast_ethaddr(const u8 *addr) 744 { 745 return 0x01 & addr[0]; 746 } 747 748 /* 749 * is_broadcast_ethaddr - Determine if the Ethernet address is broadcast 750 * @addr: Pointer to a six-byte array containing the Ethernet address 751 * 752 * Return true if the address is the broadcast address. 753 */ 754 static inline int is_broadcast_ethaddr(const u8 *addr) 755 { 756 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 757 0xff; 758 } 759 760 /* 761 * is_valid_ethaddr - Determine if the given Ethernet address is valid 762 * @addr: Pointer to a six-byte array containing the Ethernet address 763 * 764 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not 765 * a multicast address, and is not FF:FF:FF:FF:FF:FF. 766 * 767 * Return true if the address is valid. 768 */ 769 static inline int is_valid_ethaddr(const u8 *addr) 770 { 771 /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to 772 * explicitly check for it here. */ 773 return !is_multicast_ethaddr(addr) && !is_zero_ethaddr(addr); 774 } 775 776 /** 777 * net_random_ethaddr - Generate software assigned random Ethernet address 778 * @addr: Pointer to a six-byte array containing the Ethernet address 779 * 780 * Generate a random Ethernet address (MAC) that is not multicast 781 * and has the local assigned bit set. 782 */ 783 static inline void net_random_ethaddr(uchar *addr) 784 { 785 int i; 786 unsigned int seed = get_timer(0); 787 788 for (i = 0; i < 6; i++) 789 addr[i] = rand_r(&seed); 790 791 addr[0] &= 0xfe; /* clear multicast bit */ 792 addr[0] |= 0x02; /* set local assignment bit (IEEE802) */ 793 } 794 795 /* Convert an IP address to a string */ 796 void ip_to_string(struct in_addr x, char *s); 797 798 /* Convert a string to ip address */ 799 struct in_addr string_to_ip(const char *s); 800 801 /* Convert a VLAN id to a string */ 802 void vlan_to_string(ushort x, char *s); 803 804 /* Convert a string to a vlan id */ 805 ushort string_to_vlan(const char *s); 806 807 /* read a VLAN id from an environment variable */ 808 ushort getenv_vlan(char *); 809 810 /* copy a filename (allow for "..." notation, limit length) */ 811 void copy_filename(char *dst, const char *src, int size); 812 813 /* get a random source port */ 814 unsigned int random_port(void); 815 816 /* Update U-Boot over TFTP */ 817 int update_tftp(ulong addr); 818 819 /**********************************************************************/ 820 821 #endif /* __NET_H__ */ 822