net.h 27 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. /*
  3. * LiMon Monitor (LiMon) - Network.
  4. *
  5. * Copyright 1994 - 2000 Neil Russell.
  6. * (See License)
  7. *
  8. * History
  9. * 9/16/00 bor adapted to TQM823L/STK8xxL board, RARP/TFTP boot added
  10. */
  11. #ifndef __NET_H__
  12. #define __NET_H__
  13. #include <asm/cache.h>
  14. #include <asm/byteorder.h> /* for nton* / ntoh* stuff */
  15. #include <env.h>
  16. #include <linux/if_ether.h>
  17. #define DEBUG_LL_STATE 0 /* Link local state machine changes */
  18. #define DEBUG_DEV_PKT 0 /* Packets or info directed to the device */
  19. #define DEBUG_NET_PKT 0 /* Packets on info on the network at large */
  20. #define DEBUG_INT_STATE 0 /* Internal network state changes */
  21. /*
  22. * The number of receive packet buffers, and the required packet buffer
  23. * alignment in memory.
  24. *
  25. */
  26. #ifdef CONFIG_SYS_RX_ETH_BUFFER
  27. # define PKTBUFSRX CONFIG_SYS_RX_ETH_BUFFER
  28. #else
  29. # define PKTBUFSRX 4
  30. #endif
  31. #define PKTALIGN ARCH_DMA_MINALIGN
  32. /* ARP hardware address length */
  33. #define ARP_HLEN 6
  34. /*
  35. * The size of a MAC address in string form, each digit requires two chars
  36. * and five separator characters to form '00:00:00:00:00:00'.
  37. */
  38. #define ARP_HLEN_ASCII (ARP_HLEN * 2) + (ARP_HLEN - 1)
  39. /* IPv4 addresses are always 32 bits in size */
  40. struct in_addr {
  41. __be32 s_addr;
  42. };
  43. /**
  44. * An incoming packet handler.
  45. * @param pkt pointer to the application packet
  46. * @param dport destination UDP port
  47. * @param sip source IP address
  48. * @param sport source UDP port
  49. * @param len packet length
  50. */
  51. typedef void rxhand_f(uchar *pkt, unsigned dport,
  52. struct in_addr sip, unsigned sport,
  53. unsigned len);
  54. /**
  55. * An incoming ICMP packet handler.
  56. * @param type ICMP type
  57. * @param code ICMP code
  58. * @param dport destination UDP port
  59. * @param sip source IP address
  60. * @param sport source UDP port
  61. * @param pkt pointer to the ICMP packet data
  62. * @param len packet length
  63. */
  64. typedef void rxhand_icmp_f(unsigned type, unsigned code, unsigned dport,
  65. struct in_addr sip, unsigned sport, uchar *pkt, unsigned len);
  66. /*
  67. * A timeout handler. Called after time interval has expired.
  68. */
  69. typedef void thand_f(void);
  70. enum eth_state_t {
  71. ETH_STATE_INIT,
  72. ETH_STATE_PASSIVE,
  73. ETH_STATE_ACTIVE
  74. };
  75. #ifdef CONFIG_DM_ETH
  76. /**
  77. * struct eth_pdata - Platform data for Ethernet MAC controllers
  78. *
  79. * @iobase: The base address of the hardware registers
  80. * @enetaddr: The Ethernet MAC address that is loaded from EEPROM or env
  81. * @phy_interface: PHY interface to use - see PHY_INTERFACE_MODE_...
  82. * @max_speed: Maximum speed of Ethernet connection supported by MAC
  83. * @priv_pdata: device specific platdata
  84. */
  85. struct eth_pdata {
  86. phys_addr_t iobase;
  87. unsigned char enetaddr[ARP_HLEN];
  88. int phy_interface;
  89. int max_speed;
  90. void *priv_pdata;
  91. };
  92. enum eth_recv_flags {
  93. /*
  94. * Check hardware device for new packets (otherwise only return those
  95. * which are already in the memory buffer ready to process)
  96. */
  97. ETH_RECV_CHECK_DEVICE = 1 << 0,
  98. };
  99. /**
  100. * struct eth_ops - functions of Ethernet MAC controllers
  101. *
  102. * start: Prepare the hardware to send and receive packets
  103. * send: Send the bytes passed in "packet" as a packet on the wire
  104. * recv: Check if the hardware received a packet. If so, set the pointer to the
  105. * packet buffer in the packetp parameter. If not, return an error or 0 to
  106. * indicate that the hardware receive FIFO is empty. If 0 is returned, the
  107. * network stack will not process the empty packet, but free_pkt() will be
  108. * called if supplied
  109. * free_pkt: Give the driver an opportunity to manage its packet buffer memory
  110. * when the network stack is finished processing it. This will only be
  111. * called when no error was returned from recv - optional
  112. * stop: Stop the hardware from looking for packets - may be called even if
  113. * state == PASSIVE
  114. * mcast: Join or leave a multicast group (for TFTP) - optional
  115. * write_hwaddr: Write a MAC address to the hardware (used to pass it to Linux
  116. * on some platforms like ARM). This function expects the
  117. * eth_pdata::enetaddr field to be populated. The method can
  118. * return -ENOSYS to indicate that this is not implemented for
  119. this hardware - optional.
  120. * read_rom_hwaddr: Some devices have a backup of the MAC address stored in a
  121. * ROM on the board. This is how the driver should expose it
  122. * to the network stack. This function should fill in the
  123. * eth_pdata::enetaddr field - optional
  124. */
  125. struct eth_ops {
  126. int (*start)(struct udevice *dev);
  127. int (*send)(struct udevice *dev, void *packet, int length);
  128. int (*recv)(struct udevice *dev, int flags, uchar **packetp);
  129. int (*free_pkt)(struct udevice *dev, uchar *packet, int length);
  130. void (*stop)(struct udevice *dev);
  131. int (*mcast)(struct udevice *dev, const u8 *enetaddr, int join);
  132. int (*write_hwaddr)(struct udevice *dev);
  133. int (*read_rom_hwaddr)(struct udevice *dev);
  134. };
  135. #define eth_get_ops(dev) ((struct eth_ops *)(dev)->driver->ops)
  136. struct udevice *eth_get_dev(void); /* get the current device */
  137. /*
  138. * The devname can be either an exact name given by the driver or device tree
  139. * or it can be an alias of the form "eth%d"
  140. */
  141. struct udevice *eth_get_dev_by_name(const char *devname);
  142. unsigned char *eth_get_ethaddr(void); /* get the current device MAC */
  143. /* Used only when NetConsole is enabled */
  144. int eth_is_active(struct udevice *dev); /* Test device for active state */
  145. int eth_init_state_only(void); /* Set active state */
  146. void eth_halt_state_only(void); /* Set passive state */
  147. #endif
  148. #ifndef CONFIG_DM_ETH
  149. struct eth_device {
  150. #define ETH_NAME_LEN 20
  151. char name[ETH_NAME_LEN];
  152. unsigned char enetaddr[ARP_HLEN];
  153. phys_addr_t iobase;
  154. int state;
  155. int (*init)(struct eth_device *, bd_t *);
  156. int (*send)(struct eth_device *, void *packet, int length);
  157. int (*recv)(struct eth_device *);
  158. void (*halt)(struct eth_device *);
  159. int (*mcast)(struct eth_device *, const u8 *enetaddr, int join);
  160. int (*write_hwaddr)(struct eth_device *);
  161. struct eth_device *next;
  162. int index;
  163. void *priv;
  164. };
  165. int eth_register(struct eth_device *dev);/* Register network device */
  166. int eth_unregister(struct eth_device *dev);/* Remove network device */
  167. extern struct eth_device *eth_current;
  168. static __always_inline struct eth_device *eth_get_dev(void)
  169. {
  170. return eth_current;
  171. }
  172. struct eth_device *eth_get_dev_by_name(const char *devname);
  173. struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */
  174. /* get the current device MAC */
  175. static inline unsigned char *eth_get_ethaddr(void)
  176. {
  177. if (eth_current)
  178. return eth_current->enetaddr;
  179. return NULL;
  180. }
  181. /* Used only when NetConsole is enabled */
  182. int eth_is_active(struct eth_device *dev); /* Test device for active state */
  183. /* Set active state */
  184. static __always_inline int eth_init_state_only(void)
  185. {
  186. eth_get_dev()->state = ETH_STATE_ACTIVE;
  187. return 0;
  188. }
  189. /* Set passive state */
  190. static __always_inline void eth_halt_state_only(void)
  191. {
  192. eth_get_dev()->state = ETH_STATE_PASSIVE;
  193. }
  194. /*
  195. * Set the hardware address for an ethernet interface based on 'eth%daddr'
  196. * environment variable (or just 'ethaddr' if eth_number is 0).
  197. * Args:
  198. * base_name - base name for device (normally "eth")
  199. * eth_number - value of %d (0 for first device of this type)
  200. * Returns:
  201. * 0 is success, non-zero is error status from driver.
  202. */
  203. int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
  204. int eth_number);
  205. int usb_eth_initialize(bd_t *bi);
  206. #endif
  207. int eth_initialize(void); /* Initialize network subsystem */
  208. void eth_try_another(int first_restart); /* Change the device */
  209. void eth_set_current(void); /* set nterface to ethcur var */
  210. int eth_get_dev_index(void); /* get the device index */
  211. /**
  212. * eth_env_set_enetaddr_by_index() - set the MAC address environment variable
  213. *
  214. * This sets up an environment variable with the given MAC address (@enetaddr).
  215. * The environment variable to be set is defined by <@base_name><@index>addr.
  216. * If @index is 0 it is omitted. For common Ethernet this means ethaddr,
  217. * eth1addr, etc.
  218. *
  219. * @base_name: Base name for variable, typically "eth"
  220. * @index: Index of interface being updated (>=0)
  221. * @enetaddr: Pointer to MAC address to put into the variable
  222. * @return 0 if OK, other value on error
  223. */
  224. int eth_env_set_enetaddr_by_index(const char *base_name, int index,
  225. uchar *enetaddr);
  226. /*
  227. * Initialize USB ethernet device with CONFIG_DM_ETH
  228. * Returns:
  229. * 0 is success, non-zero is error status.
  230. */
  231. int usb_ether_init(void);
  232. /*
  233. * Get the hardware address for an ethernet interface .
  234. * Args:
  235. * base_name - base name for device (normally "eth")
  236. * index - device index number (0 for first)
  237. * enetaddr - returns 6 byte hardware address
  238. * Returns:
  239. * Return true if the address is valid.
  240. */
  241. int eth_env_get_enetaddr_by_index(const char *base_name, int index,
  242. uchar *enetaddr);
  243. int eth_init(void); /* Initialize the device */
  244. int eth_send(void *packet, int length); /* Send a packet */
  245. #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
  246. int eth_receive(void *packet, int length); /* Receive a packet*/
  247. extern void (*push_packet)(void *packet, int length);
  248. #endif
  249. int eth_rx(void); /* Check for received packets */
  250. void eth_halt(void); /* stop SCC */
  251. const char *eth_get_name(void); /* get name of current device */
  252. int eth_mcast_join(struct in_addr mcast_addr, int join);
  253. /**********************************************************************/
  254. /*
  255. * Protocol headers.
  256. */
  257. /*
  258. * Ethernet header
  259. */
  260. struct ethernet_hdr {
  261. u8 et_dest[ARP_HLEN]; /* Destination node */
  262. u8 et_src[ARP_HLEN]; /* Source node */
  263. u16 et_protlen; /* Protocol or length */
  264. } __attribute__((packed));
  265. /* Ethernet header size */
  266. #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr))
  267. #define ETH_FCS_LEN 4 /* Octets in the FCS */
  268. struct e802_hdr {
  269. u8 et_dest[ARP_HLEN]; /* Destination node */
  270. u8 et_src[ARP_HLEN]; /* Source node */
  271. u16 et_protlen; /* Protocol or length */
  272. u8 et_dsap; /* 802 DSAP */
  273. u8 et_ssap; /* 802 SSAP */
  274. u8 et_ctl; /* 802 control */
  275. u8 et_snap1; /* SNAP */
  276. u8 et_snap2;
  277. u8 et_snap3;
  278. u16 et_prot; /* 802 protocol */
  279. } __attribute__((packed));
  280. /* 802 + SNAP + ethernet header size */
  281. #define E802_HDR_SIZE (sizeof(struct e802_hdr))
  282. /*
  283. * Virtual LAN Ethernet header
  284. */
  285. struct vlan_ethernet_hdr {
  286. u8 vet_dest[ARP_HLEN]; /* Destination node */
  287. u8 vet_src[ARP_HLEN]; /* Source node */
  288. u16 vet_vlan_type; /* PROT_VLAN */
  289. u16 vet_tag; /* TAG of VLAN */
  290. u16 vet_type; /* protocol type */
  291. } __attribute__((packed));
  292. /* VLAN Ethernet header size */
  293. #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr))
  294. #define PROT_IP 0x0800 /* IP protocol */
  295. #define PROT_ARP 0x0806 /* IP ARP protocol */
  296. #define PROT_WOL 0x0842 /* ether-wake WoL protocol */
  297. #define PROT_RARP 0x8035 /* IP ARP protocol */
  298. #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */
  299. #define PROT_IPV6 0x86dd /* IPv6 over bluebook */
  300. #define PROT_PPP_SES 0x8864 /* PPPoE session messages */
  301. #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
  302. #define IPPROTO_UDP 17 /* User Datagram Protocol */
  303. /*
  304. * Internet Protocol (IP) header.
  305. */
  306. struct ip_hdr {
  307. u8 ip_hl_v; /* header length and version */
  308. u8 ip_tos; /* type of service */
  309. u16 ip_len; /* total length */
  310. u16 ip_id; /* identification */
  311. u16 ip_off; /* fragment offset field */
  312. u8 ip_ttl; /* time to live */
  313. u8 ip_p; /* protocol */
  314. u16 ip_sum; /* checksum */
  315. struct in_addr ip_src; /* Source IP address */
  316. struct in_addr ip_dst; /* Destination IP address */
  317. } __attribute__((packed));
  318. #define IP_OFFS 0x1fff /* ip offset *= 8 */
  319. #define IP_FLAGS 0xe000 /* first 3 bits */
  320. #define IP_FLAGS_RES 0x8000 /* reserved */
  321. #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */
  322. #define IP_FLAGS_MFRAG 0x2000 /* more fragments */
  323. #define IP_HDR_SIZE (sizeof(struct ip_hdr))
  324. /*
  325. * Internet Protocol (IP) + UDP header.
  326. */
  327. struct ip_udp_hdr {
  328. u8 ip_hl_v; /* header length and version */
  329. u8 ip_tos; /* type of service */
  330. u16 ip_len; /* total length */
  331. u16 ip_id; /* identification */
  332. u16 ip_off; /* fragment offset field */
  333. u8 ip_ttl; /* time to live */
  334. u8 ip_p; /* protocol */
  335. u16 ip_sum; /* checksum */
  336. struct in_addr ip_src; /* Source IP address */
  337. struct in_addr ip_dst; /* Destination IP address */
  338. u16 udp_src; /* UDP source port */
  339. u16 udp_dst; /* UDP destination port */
  340. u16 udp_len; /* Length of UDP packet */
  341. u16 udp_xsum; /* Checksum */
  342. } __attribute__((packed));
  343. #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr))
  344. #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE)
  345. /*
  346. * Address Resolution Protocol (ARP) header.
  347. */
  348. struct arp_hdr {
  349. u16 ar_hrd; /* Format of hardware address */
  350. # define ARP_ETHER 1 /* Ethernet hardware address */
  351. u16 ar_pro; /* Format of protocol address */
  352. u8 ar_hln; /* Length of hardware address */
  353. u8 ar_pln; /* Length of protocol address */
  354. # define ARP_PLEN 4
  355. u16 ar_op; /* Operation */
  356. # define ARPOP_REQUEST 1 /* Request to resolve address */
  357. # define ARPOP_REPLY 2 /* Response to previous request */
  358. # define RARPOP_REQUEST 3 /* Request to resolve address */
  359. # define RARPOP_REPLY 4 /* Response to previous request */
  360. /*
  361. * The remaining fields are variable in size, according to
  362. * the sizes above, and are defined as appropriate for
  363. * specific hardware/protocol combinations.
  364. */
  365. u8 ar_data[0];
  366. #define ar_sha ar_data[0]
  367. #define ar_spa ar_data[ARP_HLEN]
  368. #define ar_tha ar_data[ARP_HLEN + ARP_PLEN]
  369. #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN]
  370. #if 0
  371. u8 ar_sha[]; /* Sender hardware address */
  372. u8 ar_spa[]; /* Sender protocol address */
  373. u8 ar_tha[]; /* Target hardware address */
  374. u8 ar_tpa[]; /* Target protocol address */
  375. #endif /* 0 */
  376. } __attribute__((packed));
  377. #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
  378. /*
  379. * ICMP stuff (just enough to handle (host) redirect messages)
  380. */
  381. #define ICMP_ECHO_REPLY 0 /* Echo reply */
  382. #define ICMP_NOT_REACH 3 /* Detination unreachable */
  383. #define ICMP_REDIRECT 5 /* Redirect (change route) */
  384. #define ICMP_ECHO_REQUEST 8 /* Echo request */
  385. /* Codes for REDIRECT. */
  386. #define ICMP_REDIR_NET 0 /* Redirect Net */
  387. #define ICMP_REDIR_HOST 1 /* Redirect Host */
  388. /* Codes for NOT_REACH */
  389. #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */
  390. struct icmp_hdr {
  391. u8 type;
  392. u8 code;
  393. u16 checksum;
  394. union {
  395. struct {
  396. u16 id;
  397. u16 sequence;
  398. } echo;
  399. u32 gateway;
  400. struct {
  401. u16 unused;
  402. u16 mtu;
  403. } frag;
  404. u8 data[0];
  405. } un;
  406. } __attribute__((packed));
  407. #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr))
  408. #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE)
  409. /*
  410. * Maximum packet size; used to allocate packet storage. Use
  411. * the maxium Ethernet frame size as specified by the Ethernet
  412. * standard including the 802.1Q tag (VLAN tagging).
  413. * maximum packet size = 1522
  414. * maximum packet size and multiple of 32 bytes = 1536
  415. */
  416. #define PKTSIZE 1522
  417. #define PKTSIZE_ALIGN 1536
  418. /*
  419. * Maximum receive ring size; that is, the number of packets
  420. * we can buffer before overflow happens. Basically, this just
  421. * needs to be enough to prevent a packet being discarded while
  422. * we are processing the previous one.
  423. */
  424. #define RINGSZ 4
  425. #define RINGSZ_LOG2 2
  426. /**********************************************************************/
  427. /*
  428. * Globals.
  429. *
  430. * Note:
  431. *
  432. * All variables of type struct in_addr are stored in NETWORK byte order
  433. * (big endian).
  434. */
  435. /* net.c */
  436. /** BOOTP EXTENTIONS **/
  437. extern struct in_addr net_gateway; /* Our gateway IP address */
  438. extern struct in_addr net_netmask; /* Our subnet mask (0 = unknown) */
  439. /* Our Domain Name Server (0 = unknown) */
  440. extern struct in_addr net_dns_server;
  441. #if defined(CONFIG_BOOTP_DNS2)
  442. /* Our 2nd Domain Name Server (0 = unknown) */
  443. extern struct in_addr net_dns_server2;
  444. #endif
  445. extern char net_nis_domain[32]; /* Our IS domain */
  446. extern char net_hostname[32]; /* Our hostname */
  447. extern char net_root_path[64]; /* Our root path */
  448. /** END OF BOOTP EXTENTIONS **/
  449. extern u8 net_ethaddr[ARP_HLEN]; /* Our ethernet address */
  450. extern u8 net_server_ethaddr[ARP_HLEN]; /* Boot server enet address */
  451. extern struct in_addr net_ip; /* Our IP addr (0 = unknown) */
  452. extern struct in_addr net_server_ip; /* Server IP addr (0 = unknown) */
  453. extern uchar *net_tx_packet; /* THE transmit packet */
  454. extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */
  455. extern uchar *net_rx_packet; /* Current receive packet */
  456. extern int net_rx_packet_len; /* Current rx packet length */
  457. extern const u8 net_bcast_ethaddr[ARP_HLEN]; /* Ethernet broadcast address */
  458. extern const u8 net_null_ethaddr[ARP_HLEN];
  459. #define VLAN_NONE 4095 /* untagged */
  460. #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */
  461. extern ushort net_our_vlan; /* Our VLAN */
  462. extern ushort net_native_vlan; /* Our Native VLAN */
  463. extern int net_restart_wrap; /* Tried all network devices */
  464. enum proto_t {
  465. BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
  466. TFTPSRV, TFTPPUT, LINKLOCAL, FASTBOOT, WOL
  467. };
  468. extern char net_boot_file_name[1024];/* Boot File name */
  469. /* Indicates whether the file name was specified on the command line */
  470. extern bool net_boot_file_name_explicit;
  471. /* The actual transferred size of the bootfile (in bytes) */
  472. extern u32 net_boot_file_size;
  473. /* Boot file size in blocks as reported by the DHCP server */
  474. extern u32 net_boot_file_expected_size_in_blocks;
  475. #if defined(CONFIG_CMD_DNS)
  476. extern char *net_dns_resolve; /* The host to resolve */
  477. extern char *net_dns_env_var; /* the env var to put the ip into */
  478. #endif
  479. #if defined(CONFIG_CMD_PING)
  480. extern struct in_addr net_ping_ip; /* the ip address to ping */
  481. #endif
  482. #if defined(CONFIG_CMD_CDP)
  483. /* when CDP completes these hold the return values */
  484. extern ushort cdp_native_vlan; /* CDP returned native VLAN */
  485. extern ushort cdp_appliance_vlan; /* CDP returned appliance VLAN */
  486. /*
  487. * Check for a CDP packet by examining the received MAC address field
  488. */
  489. static inline int is_cdp_packet(const uchar *ethaddr)
  490. {
  491. extern const u8 net_cdp_ethaddr[ARP_HLEN];
  492. return memcmp(ethaddr, net_cdp_ethaddr, ARP_HLEN) == 0;
  493. }
  494. #endif
  495. #if defined(CONFIG_CMD_SNTP)
  496. extern struct in_addr net_ntp_server; /* the ip address to NTP */
  497. extern int net_ntp_time_offset; /* offset time from UTC */
  498. #endif
  499. /* Initialize the network adapter */
  500. void net_init(void);
  501. int net_loop(enum proto_t);
  502. /* Load failed. Start again. */
  503. int net_start_again(void);
  504. /* Get size of the ethernet header when we send */
  505. int net_eth_hdr_size(void);
  506. /* Set ethernet header; returns the size of the header */
  507. int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot);
  508. int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot);
  509. /* Set IP header */
  510. void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source,
  511. u16 pkt_len, u8 proto);
  512. void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport,
  513. int sport, int len);
  514. /**
  515. * compute_ip_checksum() - Compute IP checksum
  516. *
  517. * @addr: Address to check (must be 16-bit aligned)
  518. * @nbytes: Number of bytes to check (normally a multiple of 2)
  519. * @return 16-bit IP checksum
  520. */
  521. unsigned compute_ip_checksum(const void *addr, unsigned nbytes);
  522. /**
  523. * add_ip_checksums() - add two IP checksums
  524. *
  525. * @offset: Offset of first sum (if odd we do a byte-swap)
  526. * @sum: First checksum
  527. * @new_sum: New checksum to add
  528. * @return updated 16-bit IP checksum
  529. */
  530. unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum);
  531. /**
  532. * ip_checksum_ok() - check if a checksum is correct
  533. *
  534. * This works by making sure the checksum sums to 0
  535. *
  536. * @addr: Address to check (must be 16-bit aligned)
  537. * @nbytes: Number of bytes to check (normally a multiple of 2)
  538. * @return true if the checksum matches, false if not
  539. */
  540. int ip_checksum_ok(const void *addr, unsigned nbytes);
  541. /* Callbacks */
  542. rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */
  543. void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */
  544. rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */
  545. void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */
  546. bool arp_is_waiting(void); /* Waiting for ARP reply? */
  547. void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
  548. void net_set_timeout_handler(ulong, thand_f *);/* Set timeout handler */
  549. /* Network loop state */
  550. enum net_loop_state {
  551. NETLOOP_CONTINUE,
  552. NETLOOP_RESTART,
  553. NETLOOP_SUCCESS,
  554. NETLOOP_FAIL
  555. };
  556. extern enum net_loop_state net_state;
  557. static inline void net_set_state(enum net_loop_state state)
  558. {
  559. debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state);
  560. net_state = state;
  561. }
  562. /*
  563. * net_get_async_tx_pkt_buf - Get a packet buffer that is not in use for
  564. * sending an asynchronous reply
  565. *
  566. * returns - ptr to packet buffer
  567. */
  568. uchar * net_get_async_tx_pkt_buf(void);
  569. /* Transmit a packet */
  570. static inline void net_send_packet(uchar *pkt, int len)
  571. {
  572. /* Currently no way to return errors from eth_send() */
  573. (void) eth_send(pkt, len);
  574. }
  575. /*
  576. * Transmit "net_tx_packet" as UDP packet, performing ARP request if needed
  577. * (ether will be populated)
  578. *
  579. * @param ether Raw packet buffer
  580. * @param dest IP address to send the datagram to
  581. * @param dport Destination UDP port
  582. * @param sport Source UDP port
  583. * @param payload_len Length of data after the UDP header
  584. */
  585. int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport,
  586. int payload_len, int proto, u8 action, u32 tcp_seq_num,
  587. u32 tcp_ack_num);
  588. int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport,
  589. int sport, int payload_len);
  590. /* Processes a received packet */
  591. void net_process_received_packet(uchar *in_packet, int len);
  592. #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
  593. void nc_start(void);
  594. int nc_input_packet(uchar *pkt, struct in_addr src_ip, unsigned dest_port,
  595. unsigned src_port, unsigned len);
  596. #endif
  597. static __always_inline int eth_is_on_demand_init(void)
  598. {
  599. #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
  600. extern enum proto_t net_loop_last_protocol;
  601. return net_loop_last_protocol != NETCONS;
  602. #else
  603. return 1;
  604. #endif
  605. }
  606. static inline void eth_set_last_protocol(int protocol)
  607. {
  608. #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
  609. extern enum proto_t net_loop_last_protocol;
  610. net_loop_last_protocol = protocol;
  611. #endif
  612. }
  613. /*
  614. * Check if autoload is enabled. If so, use either NFS or TFTP to download
  615. * the boot file.
  616. */
  617. void net_auto_load(void);
  618. /*
  619. * The following functions are a bit ugly, but necessary to deal with
  620. * alignment restrictions on ARM.
  621. *
  622. * We're using inline functions, which had the smallest memory
  623. * footprint in our tests.
  624. */
  625. /* return IP *in network byteorder* */
  626. static inline struct in_addr net_read_ip(void *from)
  627. {
  628. struct in_addr ip;
  629. memcpy((void *)&ip, (void *)from, sizeof(ip));
  630. return ip;
  631. }
  632. /* return ulong *in network byteorder* */
  633. static inline u32 net_read_u32(void *from)
  634. {
  635. u32 l;
  636. memcpy((void *)&l, (void *)from, sizeof(l));
  637. return l;
  638. }
  639. /* write IP *in network byteorder* */
  640. static inline void net_write_ip(void *to, struct in_addr ip)
  641. {
  642. memcpy(to, (void *)&ip, sizeof(ip));
  643. }
  644. /* copy IP */
  645. static inline void net_copy_ip(void *to, void *from)
  646. {
  647. memcpy((void *)to, from, sizeof(struct in_addr));
  648. }
  649. /* copy ulong */
  650. static inline void net_copy_u32(void *to, void *from)
  651. {
  652. memcpy((void *)to, (void *)from, sizeof(u32));
  653. }
  654. /**
  655. * is_zero_ethaddr - Determine if give Ethernet address is all zeros.
  656. * @addr: Pointer to a six-byte array containing the Ethernet address
  657. *
  658. * Return true if the address is all zeroes.
  659. */
  660. static inline int is_zero_ethaddr(const u8 *addr)
  661. {
  662. return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
  663. }
  664. /**
  665. * is_multicast_ethaddr - Determine if the Ethernet address is a multicast.
  666. * @addr: Pointer to a six-byte array containing the Ethernet address
  667. *
  668. * Return true if the address is a multicast address.
  669. * By definition the broadcast address is also a multicast address.
  670. */
  671. static inline int is_multicast_ethaddr(const u8 *addr)
  672. {
  673. return 0x01 & addr[0];
  674. }
  675. /*
  676. * is_broadcast_ethaddr - Determine if the Ethernet address is broadcast
  677. * @addr: Pointer to a six-byte array containing the Ethernet address
  678. *
  679. * Return true if the address is the broadcast address.
  680. */
  681. static inline int is_broadcast_ethaddr(const u8 *addr)
  682. {
  683. return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) ==
  684. 0xff;
  685. }
  686. /*
  687. * is_valid_ethaddr - Determine if the given Ethernet address is valid
  688. * @addr: Pointer to a six-byte array containing the Ethernet address
  689. *
  690. * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
  691. * a multicast address, and is not FF:FF:FF:FF:FF:FF.
  692. *
  693. * Return true if the address is valid.
  694. */
  695. static inline int is_valid_ethaddr(const u8 *addr)
  696. {
  697. /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
  698. * explicitly check for it here. */
  699. return !is_multicast_ethaddr(addr) && !is_zero_ethaddr(addr);
  700. }
  701. /**
  702. * net_random_ethaddr - Generate software assigned random Ethernet address
  703. * @addr: Pointer to a six-byte array containing the Ethernet address
  704. *
  705. * Generate a random Ethernet address (MAC) that is not multicast
  706. * and has the local assigned bit set.
  707. */
  708. static inline void net_random_ethaddr(uchar *addr)
  709. {
  710. int i;
  711. unsigned int seed = get_timer(0);
  712. for (i = 0; i < 6; i++)
  713. addr[i] = rand_r(&seed);
  714. addr[0] &= 0xfe; /* clear multicast bit */
  715. addr[0] |= 0x02; /* set local assignment bit (IEEE802) */
  716. }
  717. /* Convert an IP address to a string */
  718. void ip_to_string(struct in_addr x, char *s);
  719. /* Convert a string to ip address */
  720. struct in_addr string_to_ip(const char *s);
  721. /* Convert a VLAN id to a string */
  722. void vlan_to_string(ushort x, char *s);
  723. /* Convert a string to a vlan id */
  724. ushort string_to_vlan(const char *s);
  725. /* read a VLAN id from an environment variable */
  726. ushort env_get_vlan(char *);
  727. /* copy a filename (allow for "..." notation, limit length) */
  728. void copy_filename(char *dst, const char *src, int size);
  729. /* check if serverip is specified in filename from the command line */
  730. int is_serverip_in_cmd(void);
  731. /**
  732. * net_parse_bootfile - Parse the bootfile env var / cmd line param
  733. *
  734. * @param ipaddr - a pointer to the ipaddr to populate if included in bootfile
  735. * @param filename - a pointer to the string to save the filename part
  736. * @param max_len - The longest - 1 that the filename part can be
  737. *
  738. * return 1 if parsed, 0 if bootfile is empty
  739. */
  740. int net_parse_bootfile(struct in_addr *ipaddr, char *filename, int max_len);
  741. /* get a random source port */
  742. unsigned int random_port(void);
  743. /**
  744. * update_tftp - Update firmware over TFTP (via DFU)
  745. *
  746. * This function updates board's firmware via TFTP
  747. *
  748. * @param addr - memory address where data is stored
  749. * @param interface - the DFU medium name - e.g. "mmc"
  750. * @param devstring - the DFU medium number - e.g. "1"
  751. *
  752. * @return - 0 on success, other value on failure
  753. */
  754. int update_tftp(ulong addr, char *interface, char *devstring);
  755. /**********************************************************************/
  756. /**
  757. * eth_parse_enetaddr() - Parse a MAC address
  758. *
  759. * Convert a string MAC address
  760. *
  761. * @addr: MAC address in aa:bb:cc:dd:ee:ff format, where each part is a 2-digit
  762. * hex value
  763. * @enetaddr: Place to put MAC address (6 bytes)
  764. */
  765. void eth_parse_enetaddr(const char *addr, uint8_t *enetaddr);
  766. #endif /* __NET_H__ */