2 * LiMon Monitor (LiMon) - Network.
4 * Copyright 1994 - 2000 Neil Russell.
6 * SPDX-License-Identifier: GPL-2.0
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 */
42 typedef __be32 IPaddr_t;
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 *, const u8 *enetaddr, u8 set);
94 int (*write_hwaddr) (struct eth_device *);
95 struct eth_device *next;
100 int eth_register(struct eth_device *dev);/* Register network device */
101 int eth_unregister(struct eth_device *dev);/* Remove network device */
103 extern struct eth_device *eth_current;
105 static inline __attribute__((always_inline))
106 struct eth_device *eth_get_dev(void)
110 struct eth_device *eth_get_dev_by_name(const char *devname);
111 struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */
113 /* get the current device MAC */
114 static inline unsigned char *eth_get_ethaddr(void)
117 return eth_current->enetaddr;
121 /* Set active state */
122 static inline __attribute__((always_inline)) int eth_init_state_only(void)
124 eth_get_dev()->state = ETH_STATE_ACTIVE;
128 /* Set passive state */
129 static inline __attribute__((always_inline)) void eth_halt_state_only(void)
131 eth_get_dev()->state = ETH_STATE_PASSIVE;
135 * Set the hardware address for an ethernet interface based on 'eth%daddr'
136 * environment variable (or just 'ethaddr' if eth_number is 0).
138 * base_name - base name for device (normally "eth")
139 * eth_number - value of %d (0 for first device of this type)
141 * 0 is success, non-zero is error status from driver.
143 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
146 int usb_eth_initialize(bd_t *bi);
148 int eth_initialize(void); /* Initialize network subsystem */
149 void eth_try_another(int first_restart); /* Change the device */
150 void eth_set_current(void); /* set nterface to ethcur var */
152 int eth_get_dev_index(void); /* get the device index */
153 void eth_parse_enetaddr(const char *addr, uchar *enetaddr);
154 int eth_getenv_enetaddr(char *name, uchar *enetaddr);
155 int eth_setenv_enetaddr(char *name, const uchar *enetaddr);
158 * Get the hardware address for an ethernet interface .
160 * base_name - base name for device (normally "eth")
161 * index - device index number (0 for first)
162 * enetaddr - returns 6 byte hardware address
164 * Return true if the address is valid.
166 int eth_getenv_enetaddr_by_index(const char *base_name, int index,
169 int eth_init(void); /* Initialize the device */
170 int eth_send(void *packet, int length); /* Send a packet */
173 int eth_receive(void *packet, int length); /* Receive a packet*/
174 extern void (*push_packet)(void *packet, int length);
176 int eth_rx(void); /* Check for received packets */
177 void eth_halt(void); /* stop SCC */
178 const char *eth_get_name(void); /* get name of current device */
180 #ifdef CONFIG_MCAST_TFTP
181 int eth_mcast_join(IPaddr_t mcast_addr, int join);
182 u32 ether_crc(size_t len, unsigned char const *p);
186 /**********************************************************************/
195 struct ethernet_hdr {
196 uchar et_dest[6]; /* Destination node */
197 uchar et_src[6]; /* Source node */
198 ushort et_protlen; /* Protocol or length */
201 /* Ethernet header size */
202 #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr))
204 #define ETH_FCS_LEN 4 /* Octets in the FCS */
207 uchar et_dest[6]; /* Destination node */
208 uchar et_src[6]; /* Source node */
209 ushort et_protlen; /* Protocol or length */
210 uchar et_dsap; /* 802 DSAP */
211 uchar et_ssap; /* 802 SSAP */
212 uchar et_ctl; /* 802 control */
213 uchar et_snap1; /* SNAP */
216 ushort et_prot; /* 802 protocol */
219 /* 802 + SNAP + ethernet header size */
220 #define E802_HDR_SIZE (sizeof(struct e802_hdr))
223 * Virtual LAN Ethernet header
225 struct vlan_ethernet_hdr {
226 uchar vet_dest[6]; /* Destination node */
227 uchar vet_src[6]; /* Source node */
228 ushort vet_vlan_type; /* PROT_VLAN */
229 ushort vet_tag; /* TAG of VLAN */
230 ushort vet_type; /* protocol type */
233 /* VLAN Ethernet header size */
234 #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr))
236 #define PROT_IP 0x0800 /* IP protocol */
237 #define PROT_ARP 0x0806 /* IP ARP protocol */
238 #define PROT_RARP 0x8035 /* IP ARP protocol */
239 #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */
241 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
242 #define IPPROTO_UDP 17 /* User Datagram Protocol */
245 * Internet Protocol (IP) header.
248 uchar ip_hl_v; /* header length and version */
249 uchar ip_tos; /* type of service */
250 ushort ip_len; /* total length */
251 ushort ip_id; /* identification */
252 ushort ip_off; /* fragment offset field */
253 uchar ip_ttl; /* time to live */
254 uchar ip_p; /* protocol */
255 ushort ip_sum; /* checksum */
256 IPaddr_t ip_src; /* Source IP address */
257 IPaddr_t ip_dst; /* Destination IP address */
260 #define IP_OFFS 0x1fff /* ip offset *= 8 */
261 #define IP_FLAGS 0xe000 /* first 3 bits */
262 #define IP_FLAGS_RES 0x8000 /* reserved */
263 #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */
264 #define IP_FLAGS_MFRAG 0x2000 /* more fragments */
266 #define IP_HDR_SIZE (sizeof(struct ip_hdr))
269 * Internet Protocol (IP) + UDP header.
272 uchar ip_hl_v; /* header length and version */
273 uchar ip_tos; /* type of service */
274 ushort ip_len; /* total length */
275 ushort ip_id; /* identification */
276 ushort ip_off; /* fragment offset field */
277 uchar ip_ttl; /* time to live */
278 uchar ip_p; /* protocol */
279 ushort ip_sum; /* checksum */
280 IPaddr_t ip_src; /* Source IP address */
281 IPaddr_t ip_dst; /* Destination IP address */
282 ushort udp_src; /* UDP source port */
283 ushort udp_dst; /* UDP destination port */
284 ushort udp_len; /* Length of UDP packet */
285 ushort udp_xsum; /* Checksum */
288 #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr))
289 #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE)
292 * Address Resolution Protocol (ARP) header.
295 ushort ar_hrd; /* Format of hardware address */
296 # define ARP_ETHER 1 /* Ethernet hardware address */
297 ushort ar_pro; /* Format of protocol address */
298 uchar ar_hln; /* Length of hardware address */
300 uchar ar_pln; /* Length of protocol address */
302 ushort ar_op; /* Operation */
303 # define ARPOP_REQUEST 1 /* Request to resolve address */
304 # define ARPOP_REPLY 2 /* Response to previous request */
306 # define RARPOP_REQUEST 3 /* Request to resolve address */
307 # define RARPOP_REPLY 4 /* Response to previous request */
310 * The remaining fields are variable in size, according to
311 * the sizes above, and are defined as appropriate for
312 * specific hardware/protocol combinations.
315 #define ar_sha ar_data[0]
316 #define ar_spa ar_data[ARP_HLEN]
317 #define ar_tha ar_data[ARP_HLEN + ARP_PLEN]
318 #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN]
320 uchar ar_sha[]; /* Sender hardware address */
321 uchar ar_spa[]; /* Sender protocol address */
322 uchar ar_tha[]; /* Target hardware address */
323 uchar ar_tpa[]; /* Target protocol address */
327 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
330 * ICMP stuff (just enough to handle (host) redirect messages)
332 #define ICMP_ECHO_REPLY 0 /* Echo reply */
333 #define ICMP_NOT_REACH 3 /* Detination unreachable */
334 #define ICMP_REDIRECT 5 /* Redirect (change route) */
335 #define ICMP_ECHO_REQUEST 8 /* Echo request */
337 /* Codes for REDIRECT. */
338 #define ICMP_REDIR_NET 0 /* Redirect Net */
339 #define ICMP_REDIR_HOST 1 /* Redirect Host */
341 /* Codes for NOT_REACH */
342 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */
362 #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr))
363 #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE)
366 * Maximum packet size; used to allocate packet storage.
367 * TFTP packets can be 524 bytes + IP header + ethernet header.
368 * Lets be conservative, and go for 38 * 16. (Must also be
369 * a multiple of 32 bytes).
372 * AS.HARNOIS : Better to set PKTSIZE to maximum size because
373 * traffic type is not always controlled
374 * maximum packet size = 1518
375 * maximum packet size and multiple of 32 bytes = 1536
378 #define PKTSIZE_ALIGN 1536
379 /*#define PKTSIZE 608*/
382 * Maximum receive ring size; that is, the number of packets
383 * we can buffer before overflow happens. Basically, this just
384 * needs to be enough to prevent a packet being discarded while
385 * we are processing the previous one.
388 #define RINGSZ_LOG2 2
390 /**********************************************************************/
396 * All variables of type IPaddr_t are stored in NETWORK byte order
401 /** BOOTP EXTENTIONS **/
402 extern IPaddr_t NetOurGatewayIP; /* Our gateway IP address */
403 extern IPaddr_t NetOurSubnetMask; /* Our subnet mask (0 = unknown) */
404 extern IPaddr_t NetOurDNSIP; /* Our Domain Name Server (0 = unknown) */
405 #if defined(CONFIG_BOOTP_DNS2)
406 extern IPaddr_t NetOurDNS2IP; /* Our 2nd Domain Name Server (0 = unknown) */
408 extern char NetOurNISDomain[32]; /* Our NIS domain */
409 extern char NetOurHostName[32]; /* Our hostname */
410 extern char NetOurRootPath[64]; /* Our root path */
411 extern ushort NetBootFileSize; /* Our boot file size in blocks */
412 /** END OF BOOTP EXTENTIONS **/
413 extern ulong NetBootFileXferSize; /* size of bootfile in bytes */
414 extern uchar NetOurEther[6]; /* Our ethernet address */
415 extern uchar NetServerEther[6]; /* Boot server enet address */
416 extern IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
417 extern IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */
418 extern uchar *NetTxPacket; /* THE transmit packet */
419 extern uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */
420 extern uchar *NetRxPacket; /* Current receive packet */
421 extern int NetRxPacketLen; /* Current rx packet length */
422 extern unsigned NetIPID; /* IP ID (counting) */
423 extern uchar NetBcastAddr[6]; /* Ethernet boardcast address */
424 extern uchar NetEtherNullAddr[6];
426 #define VLAN_NONE 4095 /* untagged */
427 #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */
428 extern ushort NetOurVLAN; /* Our VLAN */
429 extern ushort NetOurNativeVLAN; /* Our Native VLAN */
431 extern int NetRestartWrap; /* Tried all network devices */
434 BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
435 TFTPSRV, TFTPPUT, LINKLOCAL
439 extern char BootFile[128]; /* Boot File name */
441 #if defined(CONFIG_CMD_DNS)
442 extern char *NetDNSResolve; /* The host to resolve */
443 extern char *NetDNSenvvar; /* the env var to put the ip into */
446 #if defined(CONFIG_CMD_PING)
447 extern IPaddr_t NetPingIP; /* the ip address to ping */
450 #if defined(CONFIG_CMD_CDP)
451 /* when CDP completes these hold the return values */
452 extern ushort CDPNativeVLAN; /* CDP returned native VLAN */
453 extern ushort CDPApplianceVLAN; /* CDP returned appliance VLAN */
456 * Check for a CDP packet by examining the received MAC address field
458 static inline int is_cdp_packet(const uchar *et_addr)
460 extern const uchar NetCDPAddr[6];
462 return memcmp(et_addr, NetCDPAddr, 6) == 0;
466 #if defined(CONFIG_CMD_SNTP)
467 extern IPaddr_t NetNtpServerIP; /* the ip address to NTP */
468 extern int NetTimeOffset; /* offset time from UTC */
471 #if defined(CONFIG_MCAST_TFTP)
472 extern IPaddr_t Mcast_addr;
475 /* Initialize the network adapter */
477 int NetLoop(enum proto_t);
479 /* Shutdown adapters and cleanup */
482 /* Load failed. Start again. */
483 void NetStartAgain(void);
485 /* Get size of the ethernet header when we send */
486 int NetEthHdrSize(void);
488 /* Set ethernet header; returns the size of the header */
489 int NetSetEther(uchar *, uchar *, uint);
490 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot);
493 void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source);
494 void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport,
498 * compute_ip_checksum() - Compute IP checksum
500 * @addr: Address to check (must be 16-bit aligned)
501 * @nbytes: Number of bytes to check (normally a multiple of 2)
502 * @return 16-bit IP checksum
504 unsigned compute_ip_checksum(const void *addr, unsigned nbytes);
507 * add_ip_checksums() - add two IP checksums
509 * @offset: Offset of first sum (if odd we do a byte-swap)
510 * @sum: First checksum
511 * @new_sum: New checksum to add
512 * @return updated 16-bit IP checksum
514 unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum);
517 * ip_checksum_ok() - check if a checksum is correct
519 * This works by making sure the checksum sums to 0
521 * @addr: Address to check (must be 16-bit aligned)
522 * @nbytes: Number of bytes to check (normally a multiple of 2)
523 * @return true if the checksum matches, false if not
525 int ip_checksum_ok(const void *addr, unsigned nbytes);
528 rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */
529 void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */
530 rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */
531 void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */
532 void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
533 void NetSetTimeout(ulong, thand_f *);/* Set timeout handler */
535 /* Network loop state */
536 enum net_loop_state {
542 extern enum net_loop_state net_state;
544 static inline void net_set_state(enum net_loop_state state)
546 debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state);
550 /* Transmit a packet */
551 static inline void NetSendPacket(uchar *pkt, int len)
553 (void) eth_send(pkt, len);
557 * Transmit "NetTxPacket" as UDP packet, performing ARP request if needed
558 * (ether will be populated)
560 * @param ether Raw packet buffer
561 * @param dest IP address to send the datagram to
562 * @param dport Destination UDP port
563 * @param sport Source UDP port
564 * @param payload_len Length of data after the UDP header
566 int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport,
567 int sport, int payload_len);
569 /* Processes a received packet */
570 void NetReceive(uchar *, int);
572 #ifdef CONFIG_NETCONSOLE
574 int nc_input_packet(uchar *pkt, IPaddr_t src_ip, unsigned dest_port,
575 unsigned src_port, unsigned len);
578 static inline __attribute__((always_inline)) int eth_is_on_demand_init(void)
580 #ifdef CONFIG_NETCONSOLE
581 extern enum proto_t net_loop_last_protocol;
583 return net_loop_last_protocol != NETCONS;
589 static inline void eth_set_last_protocol(int protocol)
591 #ifdef CONFIG_NETCONSOLE
592 extern enum proto_t net_loop_last_protocol;
594 net_loop_last_protocol = protocol;
599 * Check if autoload is enabled. If so, use either NFS or TFTP to download
602 void net_auto_load(void);
605 * The following functions are a bit ugly, but necessary to deal with
606 * alignment restrictions on ARM.
608 * We're using inline functions, which had the smallest memory
609 * footprint in our tests.
611 /* return IP *in network byteorder* */
612 static inline IPaddr_t NetReadIP(void *from)
616 memcpy((void *)&ip, (void *)from, sizeof(ip));
620 /* return ulong *in network byteorder* */
621 static inline ulong NetReadLong(ulong *from)
625 memcpy((void *)&l, (void *)from, sizeof(l));
629 /* write IP *in network byteorder* */
630 static inline void NetWriteIP(void *to, IPaddr_t ip)
632 memcpy(to, (void *)&ip, sizeof(ip));
636 static inline void NetCopyIP(void *to, void *from)
638 memcpy((void *)to, from, sizeof(IPaddr_t));
642 static inline void NetCopyLong(ulong *to, ulong *from)
644 memcpy((void *)to, (void *)from, sizeof(ulong));
648 * is_zero_ether_addr - Determine if give Ethernet address is all zeros.
649 * @addr: Pointer to a six-byte array containing the Ethernet address
651 * Return true if the address is all zeroes.
653 static inline int is_zero_ether_addr(const u8 *addr)
655 return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
659 * is_multicast_ether_addr - Determine if the Ethernet address is a multicast.
660 * @addr: Pointer to a six-byte array containing the Ethernet address
662 * Return true if the address is a multicast address.
663 * By definition the broadcast address is also a multicast address.
665 static inline int is_multicast_ether_addr(const u8 *addr)
667 return 0x01 & addr[0];
671 * is_broadcast_ether_addr - Determine if the Ethernet address is broadcast
672 * @addr: Pointer to a six-byte array containing the Ethernet address
674 * Return true if the address is the broadcast address.
676 static inline int is_broadcast_ether_addr(const u8 *addr)
678 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) ==
683 * is_valid_ether_addr - Determine if the given Ethernet address is valid
684 * @addr: Pointer to a six-byte array containing the Ethernet address
686 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
687 * a multicast address, and is not FF:FF:FF:FF:FF:FF.
689 * Return true if the address is valid.
691 static inline int is_valid_ether_addr(const u8 *addr)
693 /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
694 * explicitly check for it here. */
695 return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr);
699 * eth_random_addr - Generate software assigned random Ethernet address
700 * @addr: Pointer to a six-byte array containing the Ethernet address
702 * Generate a random Ethernet address (MAC) that is not multicast
703 * and has the local assigned bit set.
705 static inline void eth_random_addr(uchar *addr)
708 unsigned int seed = get_timer(0);
710 for (i = 0; i < 6; i++)
711 addr[i] = rand_r(&seed);
713 addr[0] &= 0xfe; /* clear multicast bit */
714 addr[0] |= 0x02; /* set local assignment bit (IEEE802) */
717 /* Convert an IP address to a string */
718 void ip_to_string(IPaddr_t x, char *s);
720 /* Convert a string to ip address */
721 IPaddr_t string_to_ip(const char *s);
723 /* Convert a VLAN id to a string */
724 void VLAN_to_string(ushort x, char *s);
726 /* Convert a string to a vlan id */
727 ushort string_to_VLAN(const char *s);
729 /* read a VLAN id from an environment variable */
730 ushort getenv_VLAN(char *);
732 /* copy a filename (allow for "..." notation, limit length) */
733 void copy_filename(char *dst, const char *src, int size);
735 /* get a random source port */
736 unsigned int random_port(void);
738 /* Update U-Boot over TFTP */
739 int update_tftp(ulong addr);
741 /**********************************************************************/
743 #endif /* __NET_H__ */