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