2 * LiMon Monitor (LiMon) - Network.
4 * Copyright 1994 - 2000 Neil Russell.
9 * 9/16/00 bor adapted to TQM823L/STK8xxL board, RARP/TFTP boot added
15 #if defined(CONFIG_8xx)
17 #endif /* CONFIG_8xx */
19 #include <asm/cache.h>
20 #include <asm/byteorder.h> /* for nton* / ntoh* stuff */
24 * The number of receive packet buffers, and the required packet buffer
25 * alignment in memory.
29 #ifdef CONFIG_SYS_RX_ETH_BUFFER
30 # define PKTBUFSRX CONFIG_SYS_RX_ETH_BUFFER
35 #define PKTALIGN ARCH_DMA_MINALIGN
37 /* IPv4 addresses are always 32 bits in size */
42 * An incoming packet handler.
43 * @param pkt pointer to the application packet
44 * @param dport destination UDP port
45 * @param sip source IP address
46 * @param sport source UDP port
47 * @param len packet length
49 typedef void rxhand_f(uchar *pkt, unsigned dport,
50 IPaddr_t sip, unsigned sport,
54 * An incoming ICMP packet handler.
55 * @param type ICMP type
56 * @param code ICMP code
57 * @param dport destination UDP port
58 * @param sip source IP address
59 * @param sport source UDP port
60 * @param pkt pointer to the ICMP packet data
61 * @param len packet length
63 typedef void rxhand_icmp_f(unsigned type, unsigned code, unsigned dport,
64 IPaddr_t sip, unsigned sport, uchar *pkt, unsigned len);
67 * A timeout handler. Called after time interval has expired.
69 typedef void thand_f(void);
79 unsigned char enetaddr[6];
83 int (*init) (struct eth_device*, bd_t*);
84 int (*send) (struct eth_device*, volatile void* packet, int length);
85 int (*recv) (struct eth_device*);
86 void (*halt) (struct eth_device*);
87 #ifdef CONFIG_MCAST_TFTP
88 int (*mcast) (struct eth_device*, u32 ip, u8 set);
90 int (*write_hwaddr) (struct eth_device*);
91 struct eth_device *next;
96 extern int eth_initialize(bd_t *bis); /* Initialize network subsystem */
97 extern int eth_register(struct eth_device* dev);/* Register network device */
98 extern int eth_unregister(struct eth_device *dev);/* Remove network device */
99 extern void eth_try_another(int first_restart); /* Change the device */
100 extern void eth_set_current(void); /* set nterface to ethcur var */
101 extern struct eth_device *eth_get_dev(void); /* get the current device MAC */
102 extern struct eth_device *eth_get_dev_by_name(const char *devname);
103 extern struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */
104 extern int eth_get_dev_index (void); /* get the device index */
105 extern void eth_parse_enetaddr(const char *addr, uchar *enetaddr);
106 extern int eth_getenv_enetaddr(char *name, uchar *enetaddr);
107 extern int eth_setenv_enetaddr(char *name, const uchar *enetaddr);
110 * Get the hardware address for an ethernet interface .
112 * base_name - base name for device (normally "eth")
113 * index - device index number (0 for first)
114 * enetaddr - returns 6 byte hardware address
116 * Return true if the address is valid.
118 extern int eth_getenv_enetaddr_by_index(const char *base_name, int index,
121 extern int usb_eth_initialize(bd_t *bi);
122 extern int eth_init(bd_t *bis); /* Initialize the device */
123 extern int eth_send(volatile void *packet, int length); /* Send a packet */
126 extern int eth_receive(volatile void *packet, int length); /* Receive a packet*/
128 extern int eth_rx(void); /* Check for received packets */
129 extern void eth_halt(void); /* stop SCC */
130 extern char *eth_get_name(void); /* get name of current device */
133 * Set the hardware address for an ethernet interface based on 'eth%daddr'
134 * environment variable (or just 'ethaddr' if eth_number is 0).
136 * base_name - base name for device (normally "eth")
137 * eth_number - value of %d (0 for first device of this type)
139 * 0 is success, non-zero is error status from driver.
141 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
144 #ifdef CONFIG_MCAST_TFTP
145 int eth_mcast_join( IPaddr_t mcast_addr, u8 join);
146 u32 ether_crc (size_t len, unsigned char const *p);
150 /**********************************************************************/
159 uchar et_dest[6]; /* Destination node */
160 uchar et_src[6]; /* Source node */
161 ushort et_protlen; /* Protocol or length */
162 uchar et_dsap; /* 802 DSAP */
163 uchar et_ssap; /* 802 SSAP */
164 uchar et_ctl; /* 802 control */
165 uchar et_snap1; /* SNAP */
168 ushort et_prot; /* 802 protocol */
171 #define ETHER_HDR_SIZE 14 /* Ethernet header size */
172 #define E802_HDR_SIZE 22 /* 802 ethernet header size */
178 uchar vet_dest[6]; /* Destination node */
179 uchar vet_src[6]; /* Source node */
180 ushort vet_vlan_type; /* PROT_VLAN */
181 ushort vet_tag; /* TAG of VLAN */
182 ushort vet_type; /* protocol type */
185 #define VLAN_ETHER_HDR_SIZE 18 /* VLAN Ethernet header size */
187 #define PROT_IP 0x0800 /* IP protocol */
188 #define PROT_ARP 0x0806 /* IP ARP protocol */
189 #define PROT_RARP 0x8035 /* IP ARP protocol */
190 #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */
192 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
193 #define IPPROTO_UDP 17 /* User Datagram Protocol */
196 * Internet Protocol (IP) header.
199 uchar ip_hl_v; /* header length and version */
200 uchar ip_tos; /* type of service */
201 ushort ip_len; /* total length */
202 ushort ip_id; /* identification */
203 ushort ip_off; /* fragment offset field */
204 uchar ip_ttl; /* time to live */
205 uchar ip_p; /* protocol */
206 ushort ip_sum; /* checksum */
207 IPaddr_t ip_src; /* Source IP address */
208 IPaddr_t ip_dst; /* Destination IP address */
209 ushort udp_src; /* UDP source port */
210 ushort udp_dst; /* UDP destination port */
211 ushort udp_len; /* Length of UDP packet */
212 ushort udp_xsum; /* Checksum */
215 #define IP_OFFS 0x1fff /* ip offset *= 8 */
216 #define IP_FLAGS 0xe000 /* first 3 bits */
217 #define IP_FLAGS_RES 0x8000 /* reserved */
218 #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */
219 #define IP_FLAGS_MFRAG 0x2000 /* more fragments */
221 #define IP_HDR_SIZE_NO_UDP (sizeof (IP_t) - 8)
222 #define IP_HDR_SIZE (sizeof (IP_t))
226 * Address Resolution Protocol (ARP) header.
230 ushort ar_hrd; /* Format of hardware address */
231 # define ARP_ETHER 1 /* Ethernet hardware address */
232 ushort ar_pro; /* Format of protocol address */
233 uchar ar_hln; /* Length of hardware address */
234 uchar ar_pln; /* Length of protocol address */
235 ushort ar_op; /* Operation */
236 # define ARPOP_REQUEST 1 /* Request to resolve address */
237 # define ARPOP_REPLY 2 /* Response to previous request */
239 # define RARPOP_REQUEST 3 /* Request to resolve address */
240 # define RARPOP_REPLY 4 /* Response to previous request */
243 * The remaining fields are variable in size, according to
244 * the sizes above, and are defined as appropriate for
245 * specific hardware/protocol combinations.
249 uchar ar_sha[]; /* Sender hardware address */
250 uchar ar_spa[]; /* Sender protocol address */
251 uchar ar_tha[]; /* Target hardware address */
252 uchar ar_tpa[]; /* Target protocol address */
256 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
259 * ICMP stuff (just enough to handle (host) redirect messages)
261 #define ICMP_ECHO_REPLY 0 /* Echo reply */
262 #define ICMP_NOT_REACH 3 /* Detination unreachable */
263 #define ICMP_REDIRECT 5 /* Redirect (change route) */
264 #define ICMP_ECHO_REQUEST 8 /* Echo request */
266 /* Codes for REDIRECT. */
267 #define ICMP_REDIR_NET 0 /* Redirect Net */
268 #define ICMP_REDIR_HOST 1 /* Redirect Host */
270 /* Codes for NOT_REACH */
271 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */
273 typedef struct icmphdr {
293 * Maximum packet size; used to allocate packet storage.
294 * TFTP packets can be 524 bytes + IP header + ethernet header.
295 * Lets be conservative, and go for 38 * 16. (Must also be
296 * a multiple of 32 bytes).
299 * AS.HARNOIS : Better to set PKTSIZE to maximum size because
300 * traffic type is not always controlled
301 * maximum packet size = 1518
302 * maximum packet size and multiple of 32 bytes = 1536
305 #define PKTSIZE_ALIGN 1536
306 /*#define PKTSIZE 608*/
309 * Maximum receive ring size; that is, the number of packets
310 * we can buffer before overflow happens. Basically, this just
311 * needs to be enough to prevent a packet being discarded while
312 * we are processing the previous one.
315 #define RINGSZ_LOG2 2
317 /**********************************************************************/
323 * All variables of type IPaddr_t are stored in NETWORK byte order
328 /** BOOTP EXTENTIONS **/
329 extern IPaddr_t NetOurGatewayIP; /* Our gateway IP addresse */
330 extern IPaddr_t NetOurSubnetMask; /* Our subnet mask (0 = unknown)*/
331 extern IPaddr_t NetOurDNSIP; /* Our Domain Name Server (0 = unknown)*/
332 #if defined(CONFIG_BOOTP_DNS2)
333 extern IPaddr_t NetOurDNS2IP; /* Our 2nd Domain Name Server (0 = unknown)*/
335 extern char NetOurNISDomain[32]; /* Our NIS domain */
336 extern char NetOurHostName[32]; /* Our hostname */
337 extern char NetOurRootPath[64]; /* Our root path */
338 extern ushort NetBootFileSize; /* Our boot file size in blocks */
339 /** END OF BOOTP EXTENTIONS **/
340 extern ulong NetBootFileXferSize; /* size of bootfile in bytes */
341 extern uchar NetOurEther[6]; /* Our ethernet address */
342 extern uchar NetServerEther[6]; /* Boot server enet address */
343 extern IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
344 extern IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */
345 extern volatile uchar * NetTxPacket; /* THE transmit packet */
346 extern volatile uchar * NetRxPackets[PKTBUFSRX];/* Receive packets */
347 extern volatile uchar * NetRxPacket; /* Current receive packet */
348 extern int NetRxPacketLen; /* Current rx packet length */
349 extern unsigned NetIPID; /* IP ID (counting) */
350 extern uchar NetBcastAddr[6]; /* Ethernet boardcast address */
351 extern uchar NetEtherNullAddr[6];
353 #define VLAN_NONE 4095 /* untagged */
354 #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */
355 extern ushort NetOurVLAN; /* Our VLAN */
356 extern ushort NetOurNativeVLAN; /* Our Native VLAN */
358 extern uchar NetCDPAddr[6]; /* Ethernet CDP address */
359 extern ushort CDPNativeVLAN; /* CDP returned native VLAN */
360 extern ushort CDPApplianceVLAN; /* CDP returned appliance VLAN */
362 extern int NetState; /* Network loop state */
363 #define NETLOOP_CONTINUE 1
364 #define NETLOOP_RESTART 2
365 #define NETLOOP_SUCCESS 3
366 #define NETLOOP_FAIL 4
368 extern int NetRestartWrap; /* Tried all network devices */
371 BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
376 extern char BootFile[128]; /* Boot File name */
378 #if defined(CONFIG_CMD_DNS)
379 extern char *NetDNSResolve; /* The host to resolve */
380 extern char *NetDNSenvvar; /* the env var to put the ip into */
383 #if defined(CONFIG_CMD_PING)
384 extern IPaddr_t NetPingIP; /* the ip address to ping */
387 #if defined(CONFIG_CMD_CDP)
388 /* when CDP completes these hold the return values */
389 extern ushort CDPNativeVLAN;
390 extern ushort CDPApplianceVLAN;
393 #if defined(CONFIG_CMD_SNTP)
394 extern IPaddr_t NetNtpServerIP; /* the ip address to NTP */
395 extern int NetTimeOffset; /* offset time from UTC */
398 /* Initialize the network adapter */
399 extern int NetLoop(enum proto_t);
401 /* Shutdown adapters and cleanup */
402 extern void NetStop(void);
404 /* Load failed. Start again. */
405 extern void NetStartAgain(void);
407 /* Get size of the ethernet header when we send */
408 extern int NetEthHdrSize(void);
410 /* Set ethernet header; returns the size of the header */
411 extern int NetSetEther(volatile uchar *, uchar *, uint);
414 extern void NetSetIP(volatile uchar *, IPaddr_t, int, int, int);
417 extern int NetCksumOk(uchar *, int); /* Return true if cksum OK */
418 extern uint NetCksum(uchar *, int); /* Calculate the checksum */
421 extern void NetSetHandler(rxhand_f *); /* Set RX packet handler */
422 extern void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
423 extern void NetSetTimeout(ulong, thand_f *);/* Set timeout handler */
425 /* Transmit "NetTxPacket" */
426 extern void NetSendPacket(volatile uchar *, int);
428 /* Transmit UDP packet, performing ARP request if needed */
429 extern int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len);
431 /* Processes a received packet */
432 extern void NetReceive(volatile uchar *, int);
435 * Check if autoload is enabled. If so, use either NFS or TFTP to download
438 void net_auto_load(void);
441 * The following functions are a bit ugly, but necessary to deal with
442 * alignment restrictions on ARM.
444 * We're using inline functions, which had the smallest memory
445 * footprint in our tests.
447 /* return IP *in network byteorder* */
448 static inline IPaddr_t NetReadIP(volatile void *from)
451 memcpy((void*)&ip, (void*)from, sizeof(ip));
455 /* return ulong *in network byteorder* */
456 static inline ulong NetReadLong(ulong *from)
459 memcpy((void*)&l, (void*)from, sizeof(l));
463 /* write IP *in network byteorder* */
464 static inline void NetWriteIP(void *to, IPaddr_t ip)
466 memcpy(to, (void*)&ip, sizeof(ip));
470 static inline void NetCopyIP(volatile void *to, void *from)
472 memcpy((void*)to, from, sizeof(IPaddr_t));
476 static inline void NetCopyLong(ulong *to, ulong *from)
478 memcpy((void*)to, (void*)from, sizeof(ulong));
482 * is_zero_ether_addr - Determine if give Ethernet address is all zeros.
483 * @addr: Pointer to a six-byte array containing the Ethernet address
485 * Return true if the address is all zeroes.
487 static inline int is_zero_ether_addr(const u8 *addr)
489 return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
493 * is_multicast_ether_addr - Determine if the Ethernet address is a multicast.
494 * @addr: Pointer to a six-byte array containing the Ethernet address
496 * Return true if the address is a multicast address.
497 * By definition the broadcast address is also a multicast address.
499 static inline int is_multicast_ether_addr(const u8 *addr)
501 return (0x01 & addr[0]);
505 * is_broadcast_ether_addr - Determine if the Ethernet address is broadcast
506 * @addr: Pointer to a six-byte array containing the Ethernet address
508 * Return true if the address is the broadcast address.
510 static inline int is_broadcast_ether_addr(const u8 *addr)
512 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 0xff;
516 * is_valid_ether_addr - Determine if the given Ethernet address is valid
517 * @addr: Pointer to a six-byte array containing the Ethernet address
519 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
520 * a multicast address, and is not FF:FF:FF:FF:FF:FF.
522 * Return true if the address is valid.
524 static inline int is_valid_ether_addr(const u8 *addr)
526 /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
527 * explicitly check for it here. */
528 return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr);
531 /* Convert an IP address to a string */
532 extern void ip_to_string (IPaddr_t x, char *s);
534 /* Convert a string to ip address */
535 extern IPaddr_t string_to_ip(const char *s);
537 /* Convert a VLAN id to a string */
538 extern void VLAN_to_string (ushort x, char *s);
540 /* Convert a string to a vlan id */
541 extern ushort string_to_VLAN(const char *s);
543 /* read a VLAN id from an environment variable */
544 extern ushort getenv_VLAN(char *);
546 /* copy a filename (allow for "..." notation, limit length) */
547 extern void copy_filename (char *dst, const char *src, int size);
549 /* get a random source port */
550 extern unsigned int random_port(void);
552 /**********************************************************************/
554 #endif /* __NET_H__ */