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 */
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 */
28 * The number of receive packet buffers, and the required packet buffer
29 * alignment in memory.
33 #ifdef CONFIG_SYS_RX_ETH_BUFFER
34 # define PKTBUFSRX CONFIG_SYS_RX_ETH_BUFFER
39 #define PKTALIGN ARCH_DMA_MINALIGN
41 /* IPv4 addresses are always 32 bits in size */
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
53 typedef void rxhand_f(uchar *pkt, unsigned dport,
54 IPaddr_t sip, unsigned sport,
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
67 typedef void rxhand_icmp_f(unsigned type, unsigned code, unsigned dport,
68 IPaddr_t sip, unsigned sport, uchar *pkt, unsigned len);
71 * A timeout handler. Called after time interval has expired.
73 typedef void thand_f(void);
83 unsigned char enetaddr[6];
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);
94 int (*write_hwaddr) (struct eth_device *);
95 struct eth_device *next;
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 extern struct eth_device *eth_get_dev(void); /* get the current device MAC */
106 extern struct eth_device *eth_get_dev_by_name(const char *devname);
107 extern struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */
108 extern int eth_get_dev_index(void); /* get the device index */
109 extern void eth_parse_enetaddr(const char *addr, uchar *enetaddr);
110 extern int eth_getenv_enetaddr(char *name, uchar *enetaddr);
111 extern int eth_setenv_enetaddr(char *name, const uchar *enetaddr);
114 * Get the hardware address for an ethernet interface .
116 * base_name - base name for device (normally "eth")
117 * index - device index number (0 for first)
118 * enetaddr - returns 6 byte hardware address
120 * Return true if the address is valid.
122 extern int eth_getenv_enetaddr_by_index(const char *base_name, int index,
125 #ifdef CONFIG_RANDOM_MACADDR
127 * The u-boot policy does not allow hardcoded ethernet addresses. Under the
128 * following circumstances a random generated address is allowed:
129 * - in emergency cases, where you need a working network connection to set
130 * the ethernet address.
131 * Eg. you want a rescue boot and don't have a serial port to access the
132 * CLI to set environment variables.
134 * In these cases, we generate a random locally administered ethernet address.
137 * enetaddr - returns 6 byte hardware address
139 extern void eth_random_enetaddr(uchar *enetaddr);
142 extern int usb_eth_initialize(bd_t *bi);
143 extern int eth_init(bd_t *bis); /* Initialize the device */
144 extern int eth_send(void *packet, int length); /* Send a packet */
147 extern int eth_receive(void *packet, int length); /* Receive a packet*/
148 extern void (*push_packet)(void *packet, int length);
150 extern int eth_rx(void); /* Check for received packets */
151 extern void eth_halt(void); /* stop SCC */
152 extern char *eth_get_name(void); /* get name of current device */
155 * Set the hardware address for an ethernet interface based on 'eth%daddr'
156 * environment variable (or just 'ethaddr' if eth_number is 0).
158 * base_name - base name for device (normally "eth")
159 * eth_number - value of %d (0 for first device of this type)
161 * 0 is success, non-zero is error status from driver.
163 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
166 #ifdef CONFIG_MCAST_TFTP
167 int eth_mcast_join(IPaddr_t mcast_addr, u8 join);
168 u32 ether_crc(size_t len, unsigned char const *p);
172 /**********************************************************************/
181 struct ethernet_hdr {
182 uchar et_dest[6]; /* Destination node */
183 uchar et_src[6]; /* Source node */
184 ushort et_protlen; /* Protocol or length */
187 /* Ethernet header size */
188 #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr))
191 uchar et_dest[6]; /* Destination node */
192 uchar et_src[6]; /* Source node */
193 ushort et_protlen; /* Protocol or length */
194 uchar et_dsap; /* 802 DSAP */
195 uchar et_ssap; /* 802 SSAP */
196 uchar et_ctl; /* 802 control */
197 uchar et_snap1; /* SNAP */
200 ushort et_prot; /* 802 protocol */
203 /* 802 + SNAP + ethernet header size */
204 #define E802_HDR_SIZE (sizeof(struct e802_hdr))
207 * Virtual LAN Ethernet header
209 struct vlan_ethernet_hdr {
210 uchar vet_dest[6]; /* Destination node */
211 uchar vet_src[6]; /* Source node */
212 ushort vet_vlan_type; /* PROT_VLAN */
213 ushort vet_tag; /* TAG of VLAN */
214 ushort vet_type; /* protocol type */
217 /* VLAN Ethernet header size */
218 #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr))
220 #define PROT_IP 0x0800 /* IP protocol */
221 #define PROT_ARP 0x0806 /* IP ARP protocol */
222 #define PROT_RARP 0x8035 /* IP ARP protocol */
223 #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */
225 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
226 #define IPPROTO_UDP 17 /* User Datagram Protocol */
229 * Internet Protocol (IP) header.
232 uchar ip_hl_v; /* header length and version */
233 uchar ip_tos; /* type of service */
234 ushort ip_len; /* total length */
235 ushort ip_id; /* identification */
236 ushort ip_off; /* fragment offset field */
237 uchar ip_ttl; /* time to live */
238 uchar ip_p; /* protocol */
239 ushort ip_sum; /* checksum */
240 IPaddr_t ip_src; /* Source IP address */
241 IPaddr_t ip_dst; /* Destination IP address */
244 #define IP_OFFS 0x1fff /* ip offset *= 8 */
245 #define IP_FLAGS 0xe000 /* first 3 bits */
246 #define IP_FLAGS_RES 0x8000 /* reserved */
247 #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */
248 #define IP_FLAGS_MFRAG 0x2000 /* more fragments */
250 #define IP_HDR_SIZE (sizeof(struct ip_hdr))
253 * Internet Protocol (IP) + UDP header.
256 uchar ip_hl_v; /* header length and version */
257 uchar ip_tos; /* type of service */
258 ushort ip_len; /* total length */
259 ushort ip_id; /* identification */
260 ushort ip_off; /* fragment offset field */
261 uchar ip_ttl; /* time to live */
262 uchar ip_p; /* protocol */
263 ushort ip_sum; /* checksum */
264 IPaddr_t ip_src; /* Source IP address */
265 IPaddr_t ip_dst; /* Destination IP address */
266 ushort udp_src; /* UDP source port */
267 ushort udp_dst; /* UDP destination port */
268 ushort udp_len; /* Length of UDP packet */
269 ushort udp_xsum; /* Checksum */
272 #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr))
273 #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE)
276 * Address Resolution Protocol (ARP) header.
279 ushort ar_hrd; /* Format of hardware address */
280 # define ARP_ETHER 1 /* Ethernet hardware address */
281 ushort ar_pro; /* Format of protocol address */
282 uchar ar_hln; /* Length of hardware address */
284 uchar ar_pln; /* Length of protocol address */
286 ushort ar_op; /* Operation */
287 # define ARPOP_REQUEST 1 /* Request to resolve address */
288 # define ARPOP_REPLY 2 /* Response to previous request */
290 # define RARPOP_REQUEST 3 /* Request to resolve address */
291 # define RARPOP_REPLY 4 /* Response to previous request */
294 * The remaining fields are variable in size, according to
295 * the sizes above, and are defined as appropriate for
296 * specific hardware/protocol combinations.
299 #define ar_sha ar_data[0]
300 #define ar_spa ar_data[ARP_HLEN]
301 #define ar_tha ar_data[ARP_HLEN + ARP_PLEN]
302 #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN]
304 uchar ar_sha[]; /* Sender hardware address */
305 uchar ar_spa[]; /* Sender protocol address */
306 uchar ar_tha[]; /* Target hardware address */
307 uchar ar_tpa[]; /* Target protocol address */
311 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
314 * ICMP stuff (just enough to handle (host) redirect messages)
316 #define ICMP_ECHO_REPLY 0 /* Echo reply */
317 #define ICMP_NOT_REACH 3 /* Detination unreachable */
318 #define ICMP_REDIRECT 5 /* Redirect (change route) */
319 #define ICMP_ECHO_REQUEST 8 /* Echo request */
321 /* Codes for REDIRECT. */
322 #define ICMP_REDIR_NET 0 /* Redirect Net */
323 #define ICMP_REDIR_HOST 1 /* Redirect Host */
325 /* Codes for NOT_REACH */
326 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */
346 #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr))
347 #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE)
350 * Maximum packet size; used to allocate packet storage.
351 * TFTP packets can be 524 bytes + IP header + ethernet header.
352 * Lets be conservative, and go for 38 * 16. (Must also be
353 * a multiple of 32 bytes).
356 * AS.HARNOIS : Better to set PKTSIZE to maximum size because
357 * traffic type is not always controlled
358 * maximum packet size = 1518
359 * maximum packet size and multiple of 32 bytes = 1536
362 #define PKTSIZE_ALIGN 1536
363 /*#define PKTSIZE 608*/
366 * Maximum receive ring size; that is, the number of packets
367 * we can buffer before overflow happens. Basically, this just
368 * needs to be enough to prevent a packet being discarded while
369 * we are processing the previous one.
372 #define RINGSZ_LOG2 2
374 /**********************************************************************/
380 * All variables of type IPaddr_t are stored in NETWORK byte order
385 /** BOOTP EXTENTIONS **/
386 extern IPaddr_t NetOurGatewayIP; /* Our gateway IP address */
387 extern IPaddr_t NetOurSubnetMask; /* Our subnet mask (0 = unknown) */
388 extern IPaddr_t NetOurDNSIP; /* Our Domain Name Server (0 = unknown) */
389 #if defined(CONFIG_BOOTP_DNS2)
390 extern IPaddr_t NetOurDNS2IP; /* Our 2nd Domain Name Server (0 = unknown) */
392 extern char NetOurNISDomain[32]; /* Our NIS domain */
393 extern char NetOurHostName[32]; /* Our hostname */
394 extern char NetOurRootPath[64]; /* Our root path */
395 extern ushort NetBootFileSize; /* Our boot file size in blocks */
396 /** END OF BOOTP EXTENTIONS **/
397 extern ulong NetBootFileXferSize; /* size of bootfile in bytes */
398 extern uchar NetOurEther[6]; /* Our ethernet address */
399 extern uchar NetServerEther[6]; /* Boot server enet address */
400 extern IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
401 extern IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */
402 extern uchar *NetTxPacket; /* THE transmit packet */
403 extern uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */
404 extern uchar *NetRxPacket; /* Current receive packet */
405 extern int NetRxPacketLen; /* Current rx packet length */
406 extern unsigned NetIPID; /* IP ID (counting) */
407 extern uchar NetBcastAddr[6]; /* Ethernet boardcast address */
408 extern uchar NetEtherNullAddr[6];
410 #define VLAN_NONE 4095 /* untagged */
411 #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */
412 extern ushort NetOurVLAN; /* Our VLAN */
413 extern ushort NetOurNativeVLAN; /* Our Native VLAN */
415 extern int NetRestartWrap; /* Tried all network devices */
418 BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
419 TFTPSRV, TFTPPUT, LINKLOCAL
423 extern char BootFile[128]; /* Boot File name */
425 #if defined(CONFIG_CMD_DNS)
426 extern char *NetDNSResolve; /* The host to resolve */
427 extern char *NetDNSenvvar; /* the env var to put the ip into */
430 #if defined(CONFIG_CMD_PING)
431 extern IPaddr_t NetPingIP; /* the ip address to ping */
434 #if defined(CONFIG_CMD_CDP)
435 /* when CDP completes these hold the return values */
436 extern ushort CDPNativeVLAN; /* CDP returned native VLAN */
437 extern ushort CDPApplianceVLAN; /* CDP returned appliance VLAN */
440 * Check for a CDP packet by examining the received MAC address field
442 static inline int is_cdp_packet(const uchar *et_addr)
444 extern const uchar NetCDPAddr[6];
446 return memcmp(et_addr, NetCDPAddr, 6) == 0;
450 #if defined(CONFIG_CMD_SNTP)
451 extern IPaddr_t NetNtpServerIP; /* the ip address to NTP */
452 extern int NetTimeOffset; /* offset time from UTC */
455 #if defined(CONFIG_MCAST_TFTP)
456 extern IPaddr_t Mcast_addr;
459 /* Initialize the network adapter */
460 extern void net_init(void);
461 extern int NetLoop(enum proto_t);
463 /* Shutdown adapters and cleanup */
464 extern void NetStop(void);
466 /* Load failed. Start again. */
467 extern void NetStartAgain(void);
469 /* Get size of the ethernet header when we send */
470 extern int NetEthHdrSize(void);
472 /* Set ethernet header; returns the size of the header */
473 extern int NetSetEther(uchar *, uchar *, uint);
474 extern int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot);
477 extern void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source);
478 extern void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport,
482 extern int NetCksumOk(uchar *, int); /* Return true if cksum OK */
483 extern uint NetCksum(uchar *, int); /* Calculate the checksum */
486 extern rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */
487 extern void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */
488 extern rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */
489 extern void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */
490 extern void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
491 extern void NetSetTimeout(ulong, thand_f *);/* Set timeout handler */
493 /* Network loop state */
494 enum net_loop_state {
500 static inline void net_set_state(enum net_loop_state state)
502 extern enum net_loop_state net_state;
504 debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state);
508 /* Transmit a packet */
509 static inline void NetSendPacket(uchar *pkt, int len)
511 (void) eth_send(pkt, len);
515 * Transmit "NetTxPacket" as UDP packet, performing ARP request if needed
516 * (ether will be populated)
518 * @param ether Raw packet buffer
519 * @param dest IP address to send the datagram to
520 * @param dport Destination UDP port
521 * @param sport Source UDP port
522 * @param payload_len Length of data after the UDP header
524 extern int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport,
525 int sport, int payload_len);
527 /* Processes a received packet */
528 extern void NetReceive(uchar *, int);
530 #ifdef CONFIG_NETCONSOLE
532 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len);
536 * Check if autoload is enabled. If so, use either NFS or TFTP to download
539 void net_auto_load(void);
542 * The following functions are a bit ugly, but necessary to deal with
543 * alignment restrictions on ARM.
545 * We're using inline functions, which had the smallest memory
546 * footprint in our tests.
548 /* return IP *in network byteorder* */
549 static inline IPaddr_t NetReadIP(void *from)
553 memcpy((void *)&ip, (void *)from, sizeof(ip));
557 /* return ulong *in network byteorder* */
558 static inline ulong NetReadLong(ulong *from)
562 memcpy((void *)&l, (void *)from, sizeof(l));
566 /* write IP *in network byteorder* */
567 static inline void NetWriteIP(void *to, IPaddr_t ip)
569 memcpy(to, (void *)&ip, sizeof(ip));
573 static inline void NetCopyIP(void *to, void *from)
575 memcpy((void *)to, from, sizeof(IPaddr_t));
579 static inline void NetCopyLong(ulong *to, ulong *from)
581 memcpy((void *)to, (void *)from, sizeof(ulong));
585 * is_zero_ether_addr - Determine if give Ethernet address is all zeros.
586 * @addr: Pointer to a six-byte array containing the Ethernet address
588 * Return true if the address is all zeroes.
590 static inline int is_zero_ether_addr(const u8 *addr)
592 return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
596 * is_multicast_ether_addr - Determine if the Ethernet address is a multicast.
597 * @addr: Pointer to a six-byte array containing the Ethernet address
599 * Return true if the address is a multicast address.
600 * By definition the broadcast address is also a multicast address.
602 static inline int is_multicast_ether_addr(const u8 *addr)
604 return 0x01 & addr[0];
608 * is_broadcast_ether_addr - Determine if the Ethernet address is broadcast
609 * @addr: Pointer to a six-byte array containing the Ethernet address
611 * Return true if the address is the broadcast address.
613 static inline int is_broadcast_ether_addr(const u8 *addr)
615 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) ==
620 * is_valid_ether_addr - Determine if the given Ethernet address is valid
621 * @addr: Pointer to a six-byte array containing the Ethernet address
623 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
624 * a multicast address, and is not FF:FF:FF:FF:FF:FF.
626 * Return true if the address is valid.
628 static inline int is_valid_ether_addr(const u8 *addr)
630 /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
631 * explicitly check for it here. */
632 return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr);
635 /* Convert an IP address to a string */
636 extern void ip_to_string(IPaddr_t x, char *s);
638 /* Convert a string to ip address */
639 extern IPaddr_t string_to_ip(const char *s);
641 /* Convert a VLAN id to a string */
642 extern void VLAN_to_string(ushort x, char *s);
644 /* Convert a string to a vlan id */
645 extern ushort string_to_VLAN(const char *s);
647 /* read a VLAN id from an environment variable */
648 extern ushort getenv_VLAN(char *);
650 /* copy a filename (allow for "..." notation, limit length) */
651 extern void copy_filename(char *dst, const char *src, int size);
653 /* get a random source port */
654 extern unsigned int random_port(void);
656 /**********************************************************************/
658 #endif /* __NET_H__ */