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