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 */ 152 153 /* Used only when NetConsole is enabled */ 154 int eth_is_active(struct udevice *dev); /* Test device for active state */ 155 int eth_init_state_only(void); /* Set active state */ 156 void eth_halt_state_only(void); /* Set passive state */ 157 #endif 158 159 #ifndef CONFIG_DM_ETH 160 struct eth_device { 161 char name[16]; 162 unsigned char enetaddr[6]; 163 phys_addr_t iobase; 164 int state; 165 166 int (*init)(struct eth_device *, bd_t *); 167 int (*send)(struct eth_device *, void *packet, int length); 168 int (*recv)(struct eth_device *); 169 void (*halt)(struct eth_device *); 170 #ifdef CONFIG_MCAST_TFTP 171 int (*mcast)(struct eth_device *, const u8 *enetaddr, u8 set); 172 #endif 173 int (*write_hwaddr)(struct eth_device *); 174 struct eth_device *next; 175 int index; 176 void *priv; 177 }; 178 179 int eth_register(struct eth_device *dev);/* Register network device */ 180 int eth_unregister(struct eth_device *dev);/* Remove network device */ 181 182 extern struct eth_device *eth_current; 183 184 static __always_inline struct eth_device *eth_get_dev(void) 185 { 186 return eth_current; 187 } 188 struct eth_device *eth_get_dev_by_name(const char *devname); 189 struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */ 190 191 /* get the current device MAC */ 192 static inline unsigned char *eth_get_ethaddr(void) 193 { 194 if (eth_current) 195 return eth_current->enetaddr; 196 return NULL; 197 } 198 199 /* Used only when NetConsole is enabled */ 200 int eth_is_active(struct eth_device *dev); /* Test device for active state */ 201 /* Set active state */ 202 static __always_inline int eth_init_state_only(void) 203 { 204 eth_get_dev()->state = ETH_STATE_ACTIVE; 205 206 return 0; 207 } 208 /* Set passive state */ 209 static __always_inline void eth_halt_state_only(void) 210 { 211 eth_get_dev()->state = ETH_STATE_PASSIVE; 212 } 213 214 /* 215 * Set the hardware address for an ethernet interface based on 'eth%daddr' 216 * environment variable (or just 'ethaddr' if eth_number is 0). 217 * Args: 218 * base_name - base name for device (normally "eth") 219 * eth_number - value of %d (0 for first device of this type) 220 * Returns: 221 * 0 is success, non-zero is error status from driver. 222 */ 223 int eth_write_hwaddr(struct eth_device *dev, const char *base_name, 224 int eth_number); 225 226 int usb_eth_initialize(bd_t *bi); 227 #endif 228 229 int eth_initialize(void); /* Initialize network subsystem */ 230 void eth_try_another(int first_restart); /* Change the device */ 231 void eth_set_current(void); /* set nterface to ethcur var */ 232 233 int eth_get_dev_index(void); /* get the device index */ 234 void eth_parse_enetaddr(const char *addr, uchar *enetaddr); 235 int eth_getenv_enetaddr(const char *name, uchar *enetaddr); 236 int eth_setenv_enetaddr(const char *name, const uchar *enetaddr); 237 238 /* 239 * Get the hardware address for an ethernet interface . 240 * Args: 241 * base_name - base name for device (normally "eth") 242 * index - device index number (0 for first) 243 * enetaddr - returns 6 byte hardware address 244 * Returns: 245 * Return true if the address is valid. 246 */ 247 int eth_getenv_enetaddr_by_index(const char *base_name, int index, 248 uchar *enetaddr); 249 250 int eth_init(void); /* Initialize the device */ 251 int eth_send(void *packet, int length); /* Send a packet */ 252 253 #ifdef CONFIG_API 254 int eth_receive(void *packet, int length); /* Receive a packet*/ 255 extern void (*push_packet)(void *packet, int length); 256 #endif 257 int eth_rx(void); /* Check for received packets */ 258 void eth_halt(void); /* stop SCC */ 259 const char *eth_get_name(void); /* get name of current device */ 260 261 #ifdef CONFIG_MCAST_TFTP 262 int eth_mcast_join(struct in_addr mcast_addr, int join); 263 u32 ether_crc(size_t len, unsigned char const *p); 264 #endif 265 266 267 /**********************************************************************/ 268 /* 269 * Protocol headers. 270 */ 271 272 /* 273 * Ethernet header 274 */ 275 276 struct ethernet_hdr { 277 u8 et_dest[6]; /* Destination node */ 278 u8 et_src[6]; /* Source node */ 279 u16 et_protlen; /* Protocol or length */ 280 }; 281 282 /* Ethernet header size */ 283 #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr)) 284 285 #define ETH_FCS_LEN 4 /* Octets in the FCS */ 286 287 struct e802_hdr { 288 u8 et_dest[6]; /* Destination node */ 289 u8 et_src[6]; /* Source node */ 290 u16 et_protlen; /* Protocol or length */ 291 u8 et_dsap; /* 802 DSAP */ 292 u8 et_ssap; /* 802 SSAP */ 293 u8 et_ctl; /* 802 control */ 294 u8 et_snap1; /* SNAP */ 295 u8 et_snap2; 296 u8 et_snap3; 297 u16 et_prot; /* 802 protocol */ 298 }; 299 300 /* 802 + SNAP + ethernet header size */ 301 #define E802_HDR_SIZE (sizeof(struct e802_hdr)) 302 303 /* 304 * Virtual LAN Ethernet header 305 */ 306 struct vlan_ethernet_hdr { 307 u8 vet_dest[6]; /* Destination node */ 308 u8 vet_src[6]; /* Source node */ 309 u16 vet_vlan_type; /* PROT_VLAN */ 310 u16 vet_tag; /* TAG of VLAN */ 311 u16 vet_type; /* protocol type */ 312 }; 313 314 /* VLAN Ethernet header size */ 315 #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr)) 316 317 #define PROT_IP 0x0800 /* IP protocol */ 318 #define PROT_ARP 0x0806 /* IP ARP protocol */ 319 #define PROT_RARP 0x8035 /* IP ARP protocol */ 320 #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */ 321 322 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */ 323 #define IPPROTO_UDP 17 /* User Datagram Protocol */ 324 325 /* 326 * Internet Protocol (IP) header. 327 */ 328 struct ip_hdr { 329 u8 ip_hl_v; /* header length and version */ 330 u8 ip_tos; /* type of service */ 331 u16 ip_len; /* total length */ 332 u16 ip_id; /* identification */ 333 u16 ip_off; /* fragment offset field */ 334 u8 ip_ttl; /* time to live */ 335 u8 ip_p; /* protocol */ 336 u16 ip_sum; /* checksum */ 337 struct in_addr ip_src; /* Source IP address */ 338 struct in_addr ip_dst; /* Destination IP address */ 339 }; 340 341 #define IP_OFFS 0x1fff /* ip offset *= 8 */ 342 #define IP_FLAGS 0xe000 /* first 3 bits */ 343 #define IP_FLAGS_RES 0x8000 /* reserved */ 344 #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */ 345 #define IP_FLAGS_MFRAG 0x2000 /* more fragments */ 346 347 #define IP_HDR_SIZE (sizeof(struct ip_hdr)) 348 349 /* 350 * Internet Protocol (IP) + UDP header. 351 */ 352 struct ip_udp_hdr { 353 u8 ip_hl_v; /* header length and version */ 354 u8 ip_tos; /* type of service */ 355 u16 ip_len; /* total length */ 356 u16 ip_id; /* identification */ 357 u16 ip_off; /* fragment offset field */ 358 u8 ip_ttl; /* time to live */ 359 u8 ip_p; /* protocol */ 360 u16 ip_sum; /* checksum */ 361 struct in_addr ip_src; /* Source IP address */ 362 struct in_addr ip_dst; /* Destination IP address */ 363 u16 udp_src; /* UDP source port */ 364 u16 udp_dst; /* UDP destination port */ 365 u16 udp_len; /* Length of UDP packet */ 366 u16 udp_xsum; /* Checksum */ 367 }; 368 369 #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr)) 370 #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE) 371 372 /* 373 * Address Resolution Protocol (ARP) header. 374 */ 375 struct arp_hdr { 376 u16 ar_hrd; /* Format of hardware address */ 377 # define ARP_ETHER 1 /* Ethernet hardware address */ 378 u16 ar_pro; /* Format of protocol address */ 379 u8 ar_hln; /* Length of hardware address */ 380 # define ARP_HLEN 6 381 u8 ar_pln; /* Length of protocol address */ 382 # define ARP_PLEN 4 383 u16 ar_op; /* Operation */ 384 # define ARPOP_REQUEST 1 /* Request to resolve address */ 385 # define ARPOP_REPLY 2 /* Response to previous request */ 386 387 # define RARPOP_REQUEST 3 /* Request to resolve address */ 388 # define RARPOP_REPLY 4 /* Response to previous request */ 389 390 /* 391 * The remaining fields are variable in size, according to 392 * the sizes above, and are defined as appropriate for 393 * specific hardware/protocol combinations. 394 */ 395 u8 ar_data[0]; 396 #define ar_sha ar_data[0] 397 #define ar_spa ar_data[ARP_HLEN] 398 #define ar_tha ar_data[ARP_HLEN + ARP_PLEN] 399 #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN] 400 #if 0 401 u8 ar_sha[]; /* Sender hardware address */ 402 u8 ar_spa[]; /* Sender protocol address */ 403 u8 ar_tha[]; /* Target hardware address */ 404 u8 ar_tpa[]; /* Target protocol address */ 405 #endif /* 0 */ 406 }; 407 408 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */ 409 410 /* 411 * ICMP stuff (just enough to handle (host) redirect messages) 412 */ 413 #define ICMP_ECHO_REPLY 0 /* Echo reply */ 414 #define ICMP_NOT_REACH 3 /* Detination unreachable */ 415 #define ICMP_REDIRECT 5 /* Redirect (change route) */ 416 #define ICMP_ECHO_REQUEST 8 /* Echo request */ 417 418 /* Codes for REDIRECT. */ 419 #define ICMP_REDIR_NET 0 /* Redirect Net */ 420 #define ICMP_REDIR_HOST 1 /* Redirect Host */ 421 422 /* Codes for NOT_REACH */ 423 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */ 424 425 struct icmp_hdr { 426 u8 type; 427 u8 code; 428 u16 checksum; 429 union { 430 struct { 431 u16 id; 432 u16 sequence; 433 } echo; 434 u32 gateway; 435 struct { 436 u16 unused; 437 u16 mtu; 438 } frag; 439 u8 data[0]; 440 } un; 441 }; 442 443 #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr)) 444 #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE) 445 446 /* 447 * Maximum packet size; used to allocate packet storage. 448 * TFTP packets can be 524 bytes + IP header + ethernet header. 449 * Lets be conservative, and go for 38 * 16. (Must also be 450 * a multiple of 32 bytes). 451 */ 452 /* 453 * AS.HARNOIS : Better to set PKTSIZE to maximum size because 454 * traffic type is not always controlled 455 * maximum packet size = 1518 456 * maximum packet size and multiple of 32 bytes = 1536 457 */ 458 #define PKTSIZE 1518 459 #define PKTSIZE_ALIGN 1536 460 /*#define PKTSIZE 608*/ 461 462 /* 463 * Maximum receive ring size; that is, the number of packets 464 * we can buffer before overflow happens. Basically, this just 465 * needs to be enough to prevent a packet being discarded while 466 * we are processing the previous one. 467 */ 468 #define RINGSZ 4 469 #define RINGSZ_LOG2 2 470 471 /**********************************************************************/ 472 /* 473 * Globals. 474 * 475 * Note: 476 * 477 * All variables of type struct in_addr are stored in NETWORK byte order 478 * (big endian). 479 */ 480 481 /* net.c */ 482 /** BOOTP EXTENTIONS **/ 483 extern struct in_addr net_gateway; /* Our gateway IP address */ 484 extern struct in_addr net_netmask; /* Our subnet mask (0 = unknown) */ 485 /* Our Domain Name Server (0 = unknown) */ 486 extern struct in_addr net_dns_server; 487 #if defined(CONFIG_BOOTP_DNS2) 488 /* Our 2nd Domain Name Server (0 = unknown) */ 489 extern struct in_addr net_dns_server2; 490 #endif 491 extern char net_nis_domain[32]; /* Our IS domain */ 492 extern char net_hostname[32]; /* Our hostname */ 493 extern char net_root_path[64]; /* Our root path */ 494 /** END OF BOOTP EXTENTIONS **/ 495 extern u8 net_ethaddr[6]; /* Our ethernet address */ 496 extern u8 net_server_ethaddr[6]; /* Boot server enet address */ 497 extern struct in_addr net_ip; /* Our IP addr (0 = unknown) */ 498 extern struct in_addr net_server_ip; /* Server IP addr (0 = unknown) */ 499 extern uchar *net_tx_packet; /* THE transmit packet */ 500 extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */ 501 extern uchar *net_rx_packet; /* Current receive packet */ 502 extern int net_rx_packet_len; /* Current rx packet length */ 503 extern const u8 net_bcast_ethaddr[6]; /* Ethernet broadcast address */ 504 extern const u8 net_null_ethaddr[6]; 505 506 #define VLAN_NONE 4095 /* untagged */ 507 #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */ 508 extern ushort net_our_vlan; /* Our VLAN */ 509 extern ushort net_native_vlan; /* Our Native VLAN */ 510 511 extern int net_restart_wrap; /* Tried all network devices */ 512 513 enum proto_t { 514 BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP, 515 TFTPSRV, TFTPPUT, LINKLOCAL 516 }; 517 518 extern char net_boot_file_name[1024];/* Boot File name */ 519 /* The actual transferred size of the bootfile (in bytes) */ 520 extern u32 net_boot_file_size; 521 /* Boot file size in blocks as reported by the DHCP server */ 522 extern u32 net_boot_file_expected_size_in_blocks; 523 524 #if defined(CONFIG_CMD_DNS) 525 extern char *net_dns_resolve; /* The host to resolve */ 526 extern char *net_dns_env_var; /* the env var to put the ip into */ 527 #endif 528 529 #if defined(CONFIG_CMD_PING) 530 extern struct in_addr net_ping_ip; /* the ip address to ping */ 531 #endif 532 533 #if defined(CONFIG_CMD_CDP) 534 /* when CDP completes these hold the return values */ 535 extern ushort cdp_native_vlan; /* CDP returned native VLAN */ 536 extern ushort cdp_appliance_vlan; /* CDP returned appliance VLAN */ 537 538 /* 539 * Check for a CDP packet by examining the received MAC address field 540 */ 541 static inline int is_cdp_packet(const uchar *ethaddr) 542 { 543 extern const u8 net_cdp_ethaddr[6]; 544 545 return memcmp(ethaddr, net_cdp_ethaddr, 6) == 0; 546 } 547 #endif 548 549 #if defined(CONFIG_CMD_SNTP) 550 extern struct in_addr net_ntp_server; /* the ip address to NTP */ 551 extern int net_ntp_time_offset; /* offset time from UTC */ 552 #endif 553 554 #if defined(CONFIG_MCAST_TFTP) 555 extern struct in_addr net_mcast_addr; 556 #endif 557 558 /* Initialize the network adapter */ 559 void net_init(void); 560 int net_loop(enum proto_t); 561 562 /* Load failed. Start again. */ 563 int net_start_again(void); 564 565 /* Get size of the ethernet header when we send */ 566 int net_eth_hdr_size(void); 567 568 /* Set ethernet header; returns the size of the header */ 569 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot); 570 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot); 571 572 /* Set IP header */ 573 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source); 574 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport, 575 int sport, int len); 576 577 /** 578 * compute_ip_checksum() - Compute IP checksum 579 * 580 * @addr: Address to check (must be 16-bit aligned) 581 * @nbytes: Number of bytes to check (normally a multiple of 2) 582 * @return 16-bit IP checksum 583 */ 584 unsigned compute_ip_checksum(const void *addr, unsigned nbytes); 585 586 /** 587 * add_ip_checksums() - add two IP checksums 588 * 589 * @offset: Offset of first sum (if odd we do a byte-swap) 590 * @sum: First checksum 591 * @new_sum: New checksum to add 592 * @return updated 16-bit IP checksum 593 */ 594 unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum); 595 596 /** 597 * ip_checksum_ok() - check if a checksum is correct 598 * 599 * This works by making sure the checksum sums to 0 600 * 601 * @addr: Address to check (must be 16-bit aligned) 602 * @nbytes: Number of bytes to check (normally a multiple of 2) 603 * @return true if the checksum matches, false if not 604 */ 605 int ip_checksum_ok(const void *addr, unsigned nbytes); 606 607 /* Callbacks */ 608 rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */ 609 void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */ 610 rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */ 611 void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */ 612 void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */ 613 void net_set_timeout_handler(ulong, thand_f *);/* Set timeout handler */ 614 615 /* Network loop state */ 616 enum net_loop_state { 617 NETLOOP_CONTINUE, 618 NETLOOP_RESTART, 619 NETLOOP_SUCCESS, 620 NETLOOP_FAIL 621 }; 622 extern enum net_loop_state net_state; 623 624 static inline void net_set_state(enum net_loop_state state) 625 { 626 debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state); 627 net_state = state; 628 } 629 630 /* Transmit a packet */ 631 static inline void net_send_packet(uchar *pkt, int len) 632 { 633 /* Currently no way to return errors from eth_send() */ 634 (void) eth_send(pkt, len); 635 } 636 637 /* 638 * Transmit "net_tx_packet" as UDP packet, performing ARP request if needed 639 * (ether will be populated) 640 * 641 * @param ether Raw packet buffer 642 * @param dest IP address to send the datagram to 643 * @param dport Destination UDP port 644 * @param sport Source UDP port 645 * @param payload_len Length of data after the UDP header 646 */ 647 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport, 648 int sport, int payload_len); 649 650 /* Processes a received packet */ 651 void net_process_received_packet(uchar *in_packet, int len); 652 653 #ifdef CONFIG_NETCONSOLE 654 void nc_start(void); 655 int nc_input_packet(uchar *pkt, struct in_addr src_ip, unsigned dest_port, 656 unsigned src_port, unsigned len); 657 #endif 658 659 static __always_inline int eth_is_on_demand_init(void) 660 { 661 #ifdef CONFIG_NETCONSOLE 662 extern enum proto_t net_loop_last_protocol; 663 664 return net_loop_last_protocol != NETCONS; 665 #else 666 return 1; 667 #endif 668 } 669 670 static inline void eth_set_last_protocol(int protocol) 671 { 672 #ifdef CONFIG_NETCONSOLE 673 extern enum proto_t net_loop_last_protocol; 674 675 net_loop_last_protocol = protocol; 676 #endif 677 } 678 679 /* 680 * Check if autoload is enabled. If so, use either NFS or TFTP to download 681 * the boot file. 682 */ 683 void net_auto_load(void); 684 685 /* 686 * The following functions are a bit ugly, but necessary to deal with 687 * alignment restrictions on ARM. 688 * 689 * We're using inline functions, which had the smallest memory 690 * footprint in our tests. 691 */ 692 /* return IP *in network byteorder* */ 693 static inline struct in_addr net_read_ip(void *from) 694 { 695 struct in_addr ip; 696 697 memcpy((void *)&ip, (void *)from, sizeof(ip)); 698 return ip; 699 } 700 701 /* return ulong *in network byteorder* */ 702 static inline u32 net_read_u32(u32 *from) 703 { 704 u32 l; 705 706 memcpy((void *)&l, (void *)from, sizeof(l)); 707 return l; 708 } 709 710 /* write IP *in network byteorder* */ 711 static inline void net_write_ip(void *to, struct in_addr ip) 712 { 713 memcpy(to, (void *)&ip, sizeof(ip)); 714 } 715 716 /* copy IP */ 717 static inline void net_copy_ip(void *to, void *from) 718 { 719 memcpy((void *)to, from, sizeof(struct in_addr)); 720 } 721 722 /* copy ulong */ 723 static inline void net_copy_u32(u32 *to, u32 *from) 724 { 725 memcpy((void *)to, (void *)from, sizeof(u32)); 726 } 727 728 /** 729 * is_zero_ethaddr - Determine if give Ethernet address is all zeros. 730 * @addr: Pointer to a six-byte array containing the Ethernet address 731 * 732 * Return true if the address is all zeroes. 733 */ 734 static inline int is_zero_ethaddr(const u8 *addr) 735 { 736 return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]); 737 } 738 739 /** 740 * is_multicast_ethaddr - Determine if the Ethernet address is a multicast. 741 * @addr: Pointer to a six-byte array containing the Ethernet address 742 * 743 * Return true if the address is a multicast address. 744 * By definition the broadcast address is also a multicast address. 745 */ 746 static inline int is_multicast_ethaddr(const u8 *addr) 747 { 748 return 0x01 & addr[0]; 749 } 750 751 /* 752 * is_broadcast_ethaddr - Determine if the Ethernet address is broadcast 753 * @addr: Pointer to a six-byte array containing the Ethernet address 754 * 755 * Return true if the address is the broadcast address. 756 */ 757 static inline int is_broadcast_ethaddr(const u8 *addr) 758 { 759 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 760 0xff; 761 } 762 763 /* 764 * is_valid_ethaddr - Determine if the given Ethernet address is valid 765 * @addr: Pointer to a six-byte array containing the Ethernet address 766 * 767 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not 768 * a multicast address, and is not FF:FF:FF:FF:FF:FF. 769 * 770 * Return true if the address is valid. 771 */ 772 static inline int is_valid_ethaddr(const u8 *addr) 773 { 774 /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to 775 * explicitly check for it here. */ 776 return !is_multicast_ethaddr(addr) && !is_zero_ethaddr(addr); 777 } 778 779 /** 780 * net_random_ethaddr - Generate software assigned random Ethernet address 781 * @addr: Pointer to a six-byte array containing the Ethernet address 782 * 783 * Generate a random Ethernet address (MAC) that is not multicast 784 * and has the local assigned bit set. 785 */ 786 static inline void net_random_ethaddr(uchar *addr) 787 { 788 int i; 789 unsigned int seed = get_timer(0); 790 791 for (i = 0; i < 6; i++) 792 addr[i] = rand_r(&seed); 793 794 addr[0] &= 0xfe; /* clear multicast bit */ 795 addr[0] |= 0x02; /* set local assignment bit (IEEE802) */ 796 } 797 798 /* Convert an IP address to a string */ 799 void ip_to_string(struct in_addr x, char *s); 800 801 /* Convert a string to ip address */ 802 struct in_addr string_to_ip(const char *s); 803 804 /* Convert a VLAN id to a string */ 805 void vlan_to_string(ushort x, char *s); 806 807 /* Convert a string to a vlan id */ 808 ushort string_to_vlan(const char *s); 809 810 /* read a VLAN id from an environment variable */ 811 ushort getenv_vlan(char *); 812 813 /* copy a filename (allow for "..." notation, limit length) */ 814 void copy_filename(char *dst, const char *src, int size); 815 816 /* get a random source port */ 817 unsigned int random_port(void); 818 819 /** 820 * update_tftp - Update firmware over TFTP (via DFU) 821 * 822 * This function updates board's firmware via TFTP 823 * 824 * @param addr - memory address where data is stored 825 * @param interface - the DFU medium name - e.g. "mmc" 826 * @param devstring - the DFU medium number - e.g. "1" 827 * 828 * @return - 0 on success, other value on failure 829 */ 830 int update_tftp(ulong addr, char *interface, char *devstring); 831 832 /**********************************************************************/ 833 834 #endif /* __NET_H__ */ 835