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 /* get the current device MAC */
106 static inline __attribute__((always_inline))
107 struct eth_device *eth_get_dev(void)
109 extern struct eth_device *eth_current;
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);
121 * Get the hardware address for an ethernet interface .
123 * base_name - base name for device (normally "eth")
124 * index - device index number (0 for first)
125 * enetaddr - returns 6 byte hardware address
127 * Return true if the address is valid.
129 extern int eth_getenv_enetaddr_by_index(const char *base_name, int index,
132 #ifdef CONFIG_RANDOM_MACADDR
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.
141 * In these cases, we generate a random locally administered ethernet address.
144 * enetaddr - returns 6 byte hardware address
146 extern void eth_random_enetaddr(uchar *enetaddr);
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 */
154 extern int eth_receive(void *packet, int length); /* Receive a packet*/
155 extern void (*push_packet)(void *packet, int length);
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 */
161 /* Set active state */
162 static inline __attribute__((always_inline)) int eth_init_state_only(bd_t *bis)
164 eth_get_dev()->state = ETH_STATE_ACTIVE;
168 /* Set passive state */
169 static inline __attribute__((always_inline)) void eth_halt_state_only(void)
171 eth_get_dev()->state = ETH_STATE_PASSIVE;
175 * Set the hardware address for an ethernet interface based on 'eth%daddr'
176 * environment variable (or just 'ethaddr' if eth_number is 0).
178 * base_name - base name for device (normally "eth")
179 * eth_number - value of %d (0 for first device of this type)
181 * 0 is success, non-zero is error status from driver.
183 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
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);
192 /**********************************************************************/
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 */
207 /* Ethernet header size */
208 #define ETHER_HDR_SIZE (sizeof(struct ethernet_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 */
220 ushort et_prot; /* 802 protocol */
223 /* 802 + SNAP + ethernet header size */
224 #define E802_HDR_SIZE (sizeof(struct e802_hdr))
227 * Virtual LAN Ethernet header
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 */
237 /* VLAN Ethernet header size */
238 #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr))
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 */
245 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
246 #define IPPROTO_UDP 17 /* User Datagram Protocol */
249 * Internet Protocol (IP) header.
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 */
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 */
270 #define IP_HDR_SIZE (sizeof(struct ip_hdr))
273 * Internet Protocol (IP) + UDP header.
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 */
292 #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr))
293 #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE)
296 * Address Resolution Protocol (ARP) header.
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 */
304 uchar ar_pln; /* Length of protocol address */
306 ushort ar_op; /* Operation */
307 # define ARPOP_REQUEST 1 /* Request to resolve address */
308 # define ARPOP_REPLY 2 /* Response to previous request */
310 # define RARPOP_REQUEST 3 /* Request to resolve address */
311 # define RARPOP_REPLY 4 /* Response to previous request */
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.
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]
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 */
331 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
334 * ICMP stuff (just enough to handle (host) redirect messages)
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 */
341 /* Codes for REDIRECT. */
342 #define ICMP_REDIR_NET 0 /* Redirect Net */
343 #define ICMP_REDIR_HOST 1 /* Redirect Host */
345 /* Codes for NOT_REACH */
346 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */
366 #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr))
367 #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE)
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).
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
382 #define PKTSIZE_ALIGN 1536
383 /*#define PKTSIZE 608*/
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.
392 #define RINGSZ_LOG2 2
394 /**********************************************************************/
400 * All variables of type IPaddr_t are stored in NETWORK byte order
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) */
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];
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 */
435 extern int NetRestartWrap; /* Tried all network devices */
438 BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
439 TFTPSRV, TFTPPUT, LINKLOCAL
443 extern char BootFile[128]; /* Boot File name */
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 */
450 #if defined(CONFIG_CMD_PING)
451 extern IPaddr_t NetPingIP; /* the ip address to ping */
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 */
460 * Check for a CDP packet by examining the received MAC address field
462 static inline int is_cdp_packet(const uchar *et_addr)
464 extern const uchar NetCDPAddr[6];
466 return memcmp(et_addr, NetCDPAddr, 6) == 0;
470 #if defined(CONFIG_CMD_SNTP)
471 extern IPaddr_t NetNtpServerIP; /* the ip address to NTP */
472 extern int NetTimeOffset; /* offset time from UTC */
475 #if defined(CONFIG_MCAST_TFTP)
476 extern IPaddr_t Mcast_addr;
479 /* Initialize the network adapter */
480 extern void net_init(void);
481 extern int NetLoop(enum proto_t);
483 /* Shutdown adapters and cleanup */
484 extern void NetStop(void);
486 /* Load failed. Start again. */
487 extern void NetStartAgain(void);
489 /* Get size of the ethernet header when we send */
490 extern int NetEthHdrSize(void);
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);
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,
502 extern int NetCksumOk(uchar *, int); /* Return true if cksum OK */
503 extern uint NetCksum(uchar *, int); /* Calculate the checksum */
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 */
513 /* Network loop state */
514 enum net_loop_state {
520 static inline void net_set_state(enum net_loop_state state)
522 extern enum net_loop_state net_state;
524 debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state);
528 /* Transmit a packet */
529 static inline void NetSendPacket(uchar *pkt, int len)
531 (void) eth_send(pkt, len);
535 * Transmit "NetTxPacket" as UDP packet, performing ARP request if needed
536 * (ether will be populated)
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
544 extern int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport,
545 int sport, int payload_len);
547 /* Processes a received packet */
548 extern void NetReceive(uchar *, int);
550 #ifdef CONFIG_NETCONSOLE
552 int nc_input_packet(uchar *pkt, IPaddr_t src_ip, unsigned dest_port,
553 unsigned src_port, unsigned len);
556 static inline __attribute__((always_inline)) int eth_is_on_demand_init(void)
558 #ifdef CONFIG_NETCONSOLE
559 extern enum proto_t net_loop_last_protocol;
561 return net_loop_last_protocol != NETCONS;
567 static inline void eth_set_last_protocol(int protocol)
569 #ifdef CONFIG_NETCONSOLE
570 extern enum proto_t net_loop_last_protocol;
572 net_loop_last_protocol = protocol;
577 * Check if autoload is enabled. If so, use either NFS or TFTP to download
580 void net_auto_load(void);
583 * The following functions are a bit ugly, but necessary to deal with
584 * alignment restrictions on ARM.
586 * We're using inline functions, which had the smallest memory
587 * footprint in our tests.
589 /* return IP *in network byteorder* */
590 static inline IPaddr_t NetReadIP(void *from)
594 memcpy((void *)&ip, (void *)from, sizeof(ip));
598 /* return ulong *in network byteorder* */
599 static inline ulong NetReadLong(ulong *from)
603 memcpy((void *)&l, (void *)from, sizeof(l));
607 /* write IP *in network byteorder* */
608 static inline void NetWriteIP(void *to, IPaddr_t ip)
610 memcpy(to, (void *)&ip, sizeof(ip));
614 static inline void NetCopyIP(void *to, void *from)
616 memcpy((void *)to, from, sizeof(IPaddr_t));
620 static inline void NetCopyLong(ulong *to, ulong *from)
622 memcpy((void *)to, (void *)from, sizeof(ulong));
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
629 * Return true if the address is all zeroes.
631 static inline int is_zero_ether_addr(const u8 *addr)
633 return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
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
640 * Return true if the address is a multicast address.
641 * By definition the broadcast address is also a multicast address.
643 static inline int is_multicast_ether_addr(const u8 *addr)
645 return 0x01 & addr[0];
649 * is_broadcast_ether_addr - Determine if the Ethernet address is broadcast
650 * @addr: Pointer to a six-byte array containing the Ethernet address
652 * Return true if the address is the broadcast address.
654 static inline int is_broadcast_ether_addr(const u8 *addr)
656 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) ==
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
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.
667 * Return true if the address is valid.
669 static inline int is_valid_ether_addr(const u8 *addr)
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);
676 /* Convert an IP address to a string */
677 extern void ip_to_string(IPaddr_t x, char *s);
679 /* Convert a string to ip address */
680 extern IPaddr_t string_to_ip(const char *s);
682 /* Convert a VLAN id to a string */
683 extern void VLAN_to_string(ushort x, char *s);
685 /* Convert a string to a vlan id */
686 extern ushort string_to_VLAN(const char *s);
688 /* read a VLAN id from an environment variable */
689 extern ushort getenv_VLAN(char *);
691 /* copy a filename (allow for "..." notation, limit length) */
692 extern void copy_filename(char *dst, const char *src, int size);
694 /* get a random source port */
695 extern unsigned int random_port(void);
697 /**********************************************************************/
699 #endif /* __NET_H__ */