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_initialize(bd_t *bis); /* Initialize network subsystem */
101 int eth_register(struct eth_device *dev);/* Register network device */
102 int eth_unregister(struct eth_device *dev);/* Remove network device */
103 void eth_try_another(int first_restart); /* Change the device */
104 void eth_set_current(void); /* set nterface to ethcur var */
106 /* get the current device MAC */
107 extern struct eth_device *eth_current;
109 static inline __attribute__((always_inline))
110 struct eth_device *eth_get_dev(void)
115 static inline unsigned char *eth_get_ethaddr(void)
118 return eth_current->enetaddr;
122 struct eth_device *eth_get_dev_by_name(const char *devname);
123 struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */
124 int eth_get_dev_index(void); /* get the device index */
125 void eth_parse_enetaddr(const char *addr, uchar *enetaddr);
126 int eth_getenv_enetaddr(char *name, uchar *enetaddr);
127 int eth_setenv_enetaddr(char *name, const uchar *enetaddr);
130 * Get the hardware address for an ethernet interface .
132 * base_name - base name for device (normally "eth")
133 * index - device index number (0 for first)
134 * enetaddr - returns 6 byte hardware address
136 * Return true if the address is valid.
138 int eth_getenv_enetaddr_by_index(const char *base_name, int index,
141 int usb_eth_initialize(bd_t *bi);
142 int eth_init(bd_t *bis); /* Initialize the device */
143 int eth_send(void *packet, int length); /* Send a packet */
146 int eth_receive(void *packet, int length); /* Receive a packet*/
147 extern void (*push_packet)(void *packet, int length);
149 int eth_rx(void); /* Check for received packets */
150 void eth_halt(void); /* stop SCC */
151 char *eth_get_name(void); /* get name of current device */
153 /* Set active state */
154 static inline __attribute__((always_inline)) int eth_init_state_only(bd_t *bis)
156 eth_get_dev()->state = ETH_STATE_ACTIVE;
160 /* Set passive state */
161 static inline __attribute__((always_inline)) void eth_halt_state_only(void)
163 eth_get_dev()->state = ETH_STATE_PASSIVE;
167 * Set the hardware address for an ethernet interface based on 'eth%daddr'
168 * environment variable (or just 'ethaddr' if eth_number is 0).
170 * base_name - base name for device (normally "eth")
171 * eth_number - value of %d (0 for first device of this type)
173 * 0 is success, non-zero is error status from driver.
175 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
178 #ifdef CONFIG_MCAST_TFTP
179 int eth_mcast_join(IPaddr_t mcast_addr, u8 join);
180 u32 ether_crc(size_t len, unsigned char const *p);
184 /**********************************************************************/
193 struct ethernet_hdr {
194 uchar et_dest[6]; /* Destination node */
195 uchar et_src[6]; /* Source node */
196 ushort et_protlen; /* Protocol or length */
199 /* Ethernet header size */
200 #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr))
202 #define ETH_FCS_LEN 4 /* Octets in the FCS */
205 uchar et_dest[6]; /* Destination node */
206 uchar et_src[6]; /* Source node */
207 ushort et_protlen; /* Protocol or length */
208 uchar et_dsap; /* 802 DSAP */
209 uchar et_ssap; /* 802 SSAP */
210 uchar et_ctl; /* 802 control */
211 uchar et_snap1; /* SNAP */
214 ushort et_prot; /* 802 protocol */
217 /* 802 + SNAP + ethernet header size */
218 #define E802_HDR_SIZE (sizeof(struct e802_hdr))
221 * Virtual LAN Ethernet header
223 struct vlan_ethernet_hdr {
224 uchar vet_dest[6]; /* Destination node */
225 uchar vet_src[6]; /* Source node */
226 ushort vet_vlan_type; /* PROT_VLAN */
227 ushort vet_tag; /* TAG of VLAN */
228 ushort vet_type; /* protocol type */
231 /* VLAN Ethernet header size */
232 #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr))
234 #define PROT_IP 0x0800 /* IP protocol */
235 #define PROT_ARP 0x0806 /* IP ARP protocol */
236 #define PROT_RARP 0x8035 /* IP ARP protocol */
237 #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */
239 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
240 #define IPPROTO_UDP 17 /* User Datagram Protocol */
243 * Internet Protocol (IP) header.
246 uchar ip_hl_v; /* header length and version */
247 uchar ip_tos; /* type of service */
248 ushort ip_len; /* total length */
249 ushort ip_id; /* identification */
250 ushort ip_off; /* fragment offset field */
251 uchar ip_ttl; /* time to live */
252 uchar ip_p; /* protocol */
253 ushort ip_sum; /* checksum */
254 IPaddr_t ip_src; /* Source IP address */
255 IPaddr_t ip_dst; /* Destination IP address */
258 #define IP_OFFS 0x1fff /* ip offset *= 8 */
259 #define IP_FLAGS 0xe000 /* first 3 bits */
260 #define IP_FLAGS_RES 0x8000 /* reserved */
261 #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */
262 #define IP_FLAGS_MFRAG 0x2000 /* more fragments */
264 #define IP_HDR_SIZE (sizeof(struct ip_hdr))
267 * Internet Protocol (IP) + UDP header.
270 uchar ip_hl_v; /* header length and version */
271 uchar ip_tos; /* type of service */
272 ushort ip_len; /* total length */
273 ushort ip_id; /* identification */
274 ushort ip_off; /* fragment offset field */
275 uchar ip_ttl; /* time to live */
276 uchar ip_p; /* protocol */
277 ushort ip_sum; /* checksum */
278 IPaddr_t ip_src; /* Source IP address */
279 IPaddr_t ip_dst; /* Destination IP address */
280 ushort udp_src; /* UDP source port */
281 ushort udp_dst; /* UDP destination port */
282 ushort udp_len; /* Length of UDP packet */
283 ushort udp_xsum; /* Checksum */
286 #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr))
287 #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE)
290 * Address Resolution Protocol (ARP) header.
293 ushort ar_hrd; /* Format of hardware address */
294 # define ARP_ETHER 1 /* Ethernet hardware address */
295 ushort ar_pro; /* Format of protocol address */
296 uchar ar_hln; /* Length of hardware address */
298 uchar ar_pln; /* Length of protocol address */
300 ushort ar_op; /* Operation */
301 # define ARPOP_REQUEST 1 /* Request to resolve address */
302 # define ARPOP_REPLY 2 /* Response to previous request */
304 # define RARPOP_REQUEST 3 /* Request to resolve address */
305 # define RARPOP_REPLY 4 /* Response to previous request */
308 * The remaining fields are variable in size, according to
309 * the sizes above, and are defined as appropriate for
310 * specific hardware/protocol combinations.
313 #define ar_sha ar_data[0]
314 #define ar_spa ar_data[ARP_HLEN]
315 #define ar_tha ar_data[ARP_HLEN + ARP_PLEN]
316 #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN]
318 uchar ar_sha[]; /* Sender hardware address */
319 uchar ar_spa[]; /* Sender protocol address */
320 uchar ar_tha[]; /* Target hardware address */
321 uchar ar_tpa[]; /* Target protocol address */
325 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
328 * ICMP stuff (just enough to handle (host) redirect messages)
330 #define ICMP_ECHO_REPLY 0 /* Echo reply */
331 #define ICMP_NOT_REACH 3 /* Detination unreachable */
332 #define ICMP_REDIRECT 5 /* Redirect (change route) */
333 #define ICMP_ECHO_REQUEST 8 /* Echo request */
335 /* Codes for REDIRECT. */
336 #define ICMP_REDIR_NET 0 /* Redirect Net */
337 #define ICMP_REDIR_HOST 1 /* Redirect Host */
339 /* Codes for NOT_REACH */
340 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */
360 #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr))
361 #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE)
364 * Maximum packet size; used to allocate packet storage.
365 * TFTP packets can be 524 bytes + IP header + ethernet header.
366 * Lets be conservative, and go for 38 * 16. (Must also be
367 * a multiple of 32 bytes).
370 * AS.HARNOIS : Better to set PKTSIZE to maximum size because
371 * traffic type is not always controlled
372 * maximum packet size = 1518
373 * maximum packet size and multiple of 32 bytes = 1536
376 #define PKTSIZE_ALIGN 1536
377 /*#define PKTSIZE 608*/
380 * Maximum receive ring size; that is, the number of packets
381 * we can buffer before overflow happens. Basically, this just
382 * needs to be enough to prevent a packet being discarded while
383 * we are processing the previous one.
386 #define RINGSZ_LOG2 2
388 /**********************************************************************/
394 * All variables of type IPaddr_t are stored in NETWORK byte order
399 /** BOOTP EXTENTIONS **/
400 extern IPaddr_t NetOurGatewayIP; /* Our gateway IP address */
401 extern IPaddr_t NetOurSubnetMask; /* Our subnet mask (0 = unknown) */
402 extern IPaddr_t NetOurDNSIP; /* Our Domain Name Server (0 = unknown) */
403 #if defined(CONFIG_BOOTP_DNS2)
404 extern IPaddr_t NetOurDNS2IP; /* Our 2nd Domain Name Server (0 = unknown) */
406 extern char NetOurNISDomain[32]; /* Our NIS domain */
407 extern char NetOurHostName[32]; /* Our hostname */
408 extern char NetOurRootPath[64]; /* Our root path */
409 extern ushort NetBootFileSize; /* Our boot file size in blocks */
410 /** END OF BOOTP EXTENTIONS **/
411 extern ulong NetBootFileXferSize; /* size of bootfile in bytes */
412 extern uchar NetOurEther[6]; /* Our ethernet address */
413 extern uchar NetServerEther[6]; /* Boot server enet address */
414 extern IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
415 extern IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */
416 extern uchar *NetTxPacket; /* THE transmit packet */
417 extern uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */
418 extern uchar *NetRxPacket; /* Current receive packet */
419 extern int NetRxPacketLen; /* Current rx packet length */
420 extern unsigned NetIPID; /* IP ID (counting) */
421 extern uchar NetBcastAddr[6]; /* Ethernet boardcast address */
422 extern uchar NetEtherNullAddr[6];
424 #define VLAN_NONE 4095 /* untagged */
425 #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */
426 extern ushort NetOurVLAN; /* Our VLAN */
427 extern ushort NetOurNativeVLAN; /* Our Native VLAN */
429 extern int NetRestartWrap; /* Tried all network devices */
432 BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
433 TFTPSRV, TFTPPUT, LINKLOCAL
437 extern char BootFile[128]; /* Boot File name */
439 #if defined(CONFIG_CMD_DNS)
440 extern char *NetDNSResolve; /* The host to resolve */
441 extern char *NetDNSenvvar; /* the env var to put the ip into */
444 #if defined(CONFIG_CMD_PING)
445 extern IPaddr_t NetPingIP; /* the ip address to ping */
448 #if defined(CONFIG_CMD_CDP)
449 /* when CDP completes these hold the return values */
450 extern ushort CDPNativeVLAN; /* CDP returned native VLAN */
451 extern ushort CDPApplianceVLAN; /* CDP returned appliance VLAN */
454 * Check for a CDP packet by examining the received MAC address field
456 static inline int is_cdp_packet(const uchar *et_addr)
458 extern const uchar NetCDPAddr[6];
460 return memcmp(et_addr, NetCDPAddr, 6) == 0;
464 #if defined(CONFIG_CMD_SNTP)
465 extern IPaddr_t NetNtpServerIP; /* the ip address to NTP */
466 extern int NetTimeOffset; /* offset time from UTC */
469 #if defined(CONFIG_MCAST_TFTP)
470 extern IPaddr_t Mcast_addr;
473 /* Initialize the network adapter */
475 int NetLoop(enum proto_t);
477 /* Shutdown adapters and cleanup */
480 /* Load failed. Start again. */
481 void NetStartAgain(void);
483 /* Get size of the ethernet header when we send */
484 int NetEthHdrSize(void);
486 /* Set ethernet header; returns the size of the header */
487 int NetSetEther(uchar *, uchar *, uint);
488 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot);
491 void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source);
492 void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport,
496 * compute_ip_checksum() - Compute IP checksum
498 * @addr: Address to check (must be 16-bit aligned)
499 * @nbytes: Number of bytes to check (normally a multiple of 2)
500 * @return 16-bit IP checksum
502 unsigned compute_ip_checksum(const void *addr, unsigned nbytes);
505 * add_ip_checksums() - add two IP checksums
507 * @offset: Offset of first sum (if odd we do a byte-swap)
508 * @sum: First checksum
509 * @new_sum: New checksum to add
510 * @return updated 16-bit IP checksum
512 unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum);
515 * ip_checksum_ok() - check if a checksum is correct
517 * This works by making sure the checksum sums to 0
519 * @addr: Address to check (must be 16-bit aligned)
520 * @nbytes: Number of bytes to check (normally a multiple of 2)
521 * @return true if the checksum matches, false if not
523 int ip_checksum_ok(const void *addr, unsigned nbytes);
526 rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */
527 void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */
528 rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */
529 void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */
530 void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
531 void NetSetTimeout(ulong, thand_f *);/* Set timeout handler */
533 /* Network loop state */
534 enum net_loop_state {
540 extern enum net_loop_state net_state;
542 static inline void net_set_state(enum net_loop_state state)
544 debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state);
548 /* Transmit a packet */
549 static inline void NetSendPacket(uchar *pkt, int len)
551 (void) eth_send(pkt, len);
555 * Transmit "NetTxPacket" as UDP packet, performing ARP request if needed
556 * (ether will be populated)
558 * @param ether Raw packet buffer
559 * @param dest IP address to send the datagram to
560 * @param dport Destination UDP port
561 * @param sport Source UDP port
562 * @param payload_len Length of data after the UDP header
564 int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport,
565 int sport, int payload_len);
567 /* Processes a received packet */
568 void NetReceive(uchar *, int);
570 #ifdef CONFIG_NETCONSOLE
572 int nc_input_packet(uchar *pkt, IPaddr_t src_ip, unsigned dest_port,
573 unsigned src_port, unsigned len);
576 static inline __attribute__((always_inline)) int eth_is_on_demand_init(void)
578 #ifdef CONFIG_NETCONSOLE
579 extern enum proto_t net_loop_last_protocol;
581 return net_loop_last_protocol != NETCONS;
587 static inline void eth_set_last_protocol(int protocol)
589 #ifdef CONFIG_NETCONSOLE
590 extern enum proto_t net_loop_last_protocol;
592 net_loop_last_protocol = protocol;
597 * Check if autoload is enabled. If so, use either NFS or TFTP to download
600 void net_auto_load(void);
603 * The following functions are a bit ugly, but necessary to deal with
604 * alignment restrictions on ARM.
606 * We're using inline functions, which had the smallest memory
607 * footprint in our tests.
609 /* return IP *in network byteorder* */
610 static inline IPaddr_t NetReadIP(void *from)
614 memcpy((void *)&ip, (void *)from, sizeof(ip));
618 /* return ulong *in network byteorder* */
619 static inline ulong NetReadLong(ulong *from)
623 memcpy((void *)&l, (void *)from, sizeof(l));
627 /* write IP *in network byteorder* */
628 static inline void NetWriteIP(void *to, IPaddr_t ip)
630 memcpy(to, (void *)&ip, sizeof(ip));
634 static inline void NetCopyIP(void *to, void *from)
636 memcpy((void *)to, from, sizeof(IPaddr_t));
640 static inline void NetCopyLong(ulong *to, ulong *from)
642 memcpy((void *)to, (void *)from, sizeof(ulong));
646 * is_zero_ether_addr - Determine if give Ethernet address is all zeros.
647 * @addr: Pointer to a six-byte array containing the Ethernet address
649 * Return true if the address is all zeroes.
651 static inline int is_zero_ether_addr(const u8 *addr)
653 return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
657 * is_multicast_ether_addr - Determine if the Ethernet address is a multicast.
658 * @addr: Pointer to a six-byte array containing the Ethernet address
660 * Return true if the address is a multicast address.
661 * By definition the broadcast address is also a multicast address.
663 static inline int is_multicast_ether_addr(const u8 *addr)
665 return 0x01 & addr[0];
669 * is_broadcast_ether_addr - Determine if the Ethernet address is broadcast
670 * @addr: Pointer to a six-byte array containing the Ethernet address
672 * Return true if the address is the broadcast address.
674 static inline int is_broadcast_ether_addr(const u8 *addr)
676 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) ==
681 * is_valid_ether_addr - Determine if the given Ethernet address is valid
682 * @addr: Pointer to a six-byte array containing the Ethernet address
684 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
685 * a multicast address, and is not FF:FF:FF:FF:FF:FF.
687 * Return true if the address is valid.
689 static inline int is_valid_ether_addr(const u8 *addr)
691 /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
692 * explicitly check for it here. */
693 return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr);
697 * eth_random_addr - Generate software assigned random Ethernet address
698 * @addr: Pointer to a six-byte array containing the Ethernet address
700 * Generate a random Ethernet address (MAC) that is not multicast
701 * and has the local assigned bit set.
703 static inline void eth_random_addr(uchar *addr)
706 unsigned int seed = get_timer(0);
708 for (i = 0; i < 6; i++)
709 addr[i] = rand_r(&seed);
711 addr[0] &= 0xfe; /* clear multicast bit */
712 addr[0] |= 0x02; /* set local assignment bit (IEEE802) */
715 /* Convert an IP address to a string */
716 void ip_to_string(IPaddr_t x, char *s);
718 /* Convert a string to ip address */
719 IPaddr_t string_to_ip(const char *s);
721 /* Convert a VLAN id to a string */
722 void VLAN_to_string(ushort x, char *s);
724 /* Convert a string to a vlan id */
725 ushort string_to_VLAN(const char *s);
727 /* read a VLAN id from an environment variable */
728 ushort getenv_VLAN(char *);
730 /* copy a filename (allow for "..." notation, limit length) */
731 void copy_filename(char *dst, const char *src, int size);
733 /* get a random source port */
734 unsigned int random_port(void);
736 /* Update U-Boot over TFTP */
737 int update_tftp(ulong addr);
739 /**********************************************************************/
741 #endif /* __NET_H__ */