blob: a88cf8472f9cd54a8c6971e4caff51fcb180805f
1 | /* |
2 | * LiMon Monitor (LiMon) - Network. |
3 | * |
4 | * Copyright 1994 - 2000 Neil Russell. |
5 | * (See License) |
6 | * SPDX-License-Identifier: GPL-2.0 |
7 | * |
8 | * History |
9 | * 9/16/00 bor adapted to TQM823L/STK8xxL board, RARP/TFTP boot added |
10 | */ |
11 | |
12 | #ifndef __NET_H__ |
13 | #define __NET_H__ |
14 | |
15 | #if defined(CONFIG_8xx) |
16 | #include <commproc.h> |
17 | #endif /* CONFIG_8xx */ |
18 | |
19 | #include <asm/cache.h> |
20 | #include <asm/byteorder.h> /* for nton* / ntoh* stuff */ |
21 | |
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 */ |
26 | |
27 | /* |
28 | * The number of receive packet buffers, and the required packet buffer |
29 | * alignment in memory. |
30 | * |
31 | */ |
32 | |
33 | #ifdef CONFIG_SYS_RX_ETH_BUFFER |
34 | # define PKTBUFSRX CONFIG_SYS_RX_ETH_BUFFER |
35 | #else |
36 | # define PKTBUFSRX 4 |
37 | #endif |
38 | |
39 | #define PKTALIGN ARCH_DMA_MINALIGN |
40 | |
41 | /* IPv4 addresses are always 32 bits in size */ |
42 | typedef __be32 IPaddr_t; |
43 | |
44 | |
45 | /** |
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 |
52 | */ |
53 | typedef void rxhand_f(uchar *pkt, unsigned dport, |
54 | IPaddr_t sip, unsigned sport, |
55 | unsigned len); |
56 | |
57 | /** |
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 |
66 | */ |
67 | typedef void rxhand_icmp_f(unsigned type, unsigned code, unsigned dport, |
68 | IPaddr_t sip, unsigned sport, uchar *pkt, unsigned len); |
69 | |
70 | /* |
71 | * A timeout handler. Called after time interval has expired. |
72 | */ |
73 | typedef void thand_f(void); |
74 | |
75 | enum eth_state_t { |
76 | ETH_STATE_INIT, |
77 | ETH_STATE_PASSIVE, |
78 | ETH_STATE_ACTIVE |
79 | }; |
80 | |
81 | struct eth_device { |
82 | char name[16]; |
83 | unsigned char enetaddr[6]; |
84 | int iobase; |
85 | int state; |
86 | |
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); |
93 | #endif |
94 | int (*write_hwaddr) (struct eth_device *); |
95 | struct eth_device *next; |
96 | int index; |
97 | void *priv; |
98 | }; |
99 | |
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 | |
106 | /* get the current device MAC */ |
107 | extern struct eth_device *eth_current; |
108 | |
109 | static inline __attribute__((always_inline)) |
110 | struct eth_device *eth_get_dev(void) |
111 | { |
112 | return eth_current; |
113 | } |
114 | extern struct eth_device *eth_get_dev_by_name(const char *devname); |
115 | extern struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */ |
116 | extern int eth_get_dev_index(void); /* get the device index */ |
117 | extern void eth_parse_enetaddr(const char *addr, uchar *enetaddr); |
118 | extern int eth_getenv_enetaddr(char *name, uchar *enetaddr); |
119 | extern int eth_setenv_enetaddr(char *name, const uchar *enetaddr); |
120 | |
121 | /* |
122 | * Get the hardware address for an ethernet interface . |
123 | * Args: |
124 | * base_name - base name for device (normally "eth") |
125 | * index - device index number (0 for first) |
126 | * enetaddr - returns 6 byte hardware address |
127 | * Returns: |
128 | * Return true if the address is valid. |
129 | */ |
130 | extern int eth_getenv_enetaddr_by_index(const char *base_name, int index, |
131 | uchar *enetaddr); |
132 | |
133 | extern int usb_eth_initialize(bd_t *bi); |
134 | extern int eth_init(bd_t *bis); /* Initialize the device */ |
135 | extern int eth_send(void *packet, int length); /* Send a packet */ |
136 | |
137 | #ifdef CONFIG_API |
138 | extern int eth_receive(void *packet, int length); /* Receive a packet*/ |
139 | extern void (*push_packet)(void *packet, int length); |
140 | #endif |
141 | extern int eth_rx(void); /* Check for received packets */ |
142 | extern void eth_halt(void); /* stop SCC */ |
143 | extern char *eth_get_name(void); /* get name of current device */ |
144 | |
145 | /* Set active state */ |
146 | static inline __attribute__((always_inline)) int eth_init_state_only(bd_t *bis) |
147 | { |
148 | eth_get_dev()->state = ETH_STATE_ACTIVE; |
149 | |
150 | return 0; |
151 | } |
152 | /* Set passive state */ |
153 | static inline __attribute__((always_inline)) void eth_halt_state_only(void) |
154 | { |
155 | eth_get_dev()->state = ETH_STATE_PASSIVE; |
156 | } |
157 | |
158 | /* |
159 | * Set the hardware address for an ethernet interface based on 'eth%daddr' |
160 | * environment variable (or just 'ethaddr' if eth_number is 0). |
161 | * Args: |
162 | * base_name - base name for device (normally "eth") |
163 | * eth_number - value of %d (0 for first device of this type) |
164 | * Returns: |
165 | * 0 is success, non-zero is error status from driver. |
166 | */ |
167 | int eth_write_hwaddr(struct eth_device *dev, const char *base_name, |
168 | int eth_number); |
169 | |
170 | #ifdef CONFIG_MCAST_TFTP |
171 | int eth_mcast_join(IPaddr_t mcast_addr, u8 join); |
172 | u32 ether_crc(size_t len, unsigned char const *p); |
173 | #endif |
174 | |
175 | |
176 | /**********************************************************************/ |
177 | /* |
178 | * Protocol headers. |
179 | */ |
180 | |
181 | /* |
182 | * Ethernet header |
183 | */ |
184 | |
185 | struct ethernet_hdr { |
186 | uchar et_dest[6]; /* Destination node */ |
187 | uchar et_src[6]; /* Source node */ |
188 | ushort et_protlen; /* Protocol or length */ |
189 | }; |
190 | |
191 | /* Ethernet header size */ |
192 | #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr)) |
193 | |
194 | struct e802_hdr { |
195 | uchar et_dest[6]; /* Destination node */ |
196 | uchar et_src[6]; /* Source node */ |
197 | ushort et_protlen; /* Protocol or length */ |
198 | uchar et_dsap; /* 802 DSAP */ |
199 | uchar et_ssap; /* 802 SSAP */ |
200 | uchar et_ctl; /* 802 control */ |
201 | uchar et_snap1; /* SNAP */ |
202 | uchar et_snap2; |
203 | uchar et_snap3; |
204 | ushort et_prot; /* 802 protocol */ |
205 | }; |
206 | |
207 | /* 802 + SNAP + ethernet header size */ |
208 | #define E802_HDR_SIZE (sizeof(struct e802_hdr)) |
209 | |
210 | /* |
211 | * Virtual LAN Ethernet header |
212 | */ |
213 | struct vlan_ethernet_hdr { |
214 | uchar vet_dest[6]; /* Destination node */ |
215 | uchar vet_src[6]; /* Source node */ |
216 | ushort vet_vlan_type; /* PROT_VLAN */ |
217 | ushort vet_tag; /* TAG of VLAN */ |
218 | ushort vet_type; /* protocol type */ |
219 | }; |
220 | |
221 | /* VLAN Ethernet header size */ |
222 | #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr)) |
223 | |
224 | #define PROT_IP 0x0800 /* IP protocol */ |
225 | #define PROT_ARP 0x0806 /* IP ARP protocol */ |
226 | #define PROT_RARP 0x8035 /* IP ARP protocol */ |
227 | #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */ |
228 | |
229 | #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */ |
230 | #define IPPROTO_UDP 17 /* User Datagram Protocol */ |
231 | |
232 | /* |
233 | * Internet Protocol (IP) header. |
234 | */ |
235 | struct ip_hdr { |
236 | uchar ip_hl_v; /* header length and version */ |
237 | uchar ip_tos; /* type of service */ |
238 | ushort ip_len; /* total length */ |
239 | ushort ip_id; /* identification */ |
240 | ushort ip_off; /* fragment offset field */ |
241 | uchar ip_ttl; /* time to live */ |
242 | uchar ip_p; /* protocol */ |
243 | ushort ip_sum; /* checksum */ |
244 | IPaddr_t ip_src; /* Source IP address */ |
245 | IPaddr_t ip_dst; /* Destination IP address */ |
246 | }; |
247 | |
248 | #define IP_OFFS 0x1fff /* ip offset *= 8 */ |
249 | #define IP_FLAGS 0xe000 /* first 3 bits */ |
250 | #define IP_FLAGS_RES 0x8000 /* reserved */ |
251 | #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */ |
252 | #define IP_FLAGS_MFRAG 0x2000 /* more fragments */ |
253 | |
254 | #define IP_HDR_SIZE (sizeof(struct ip_hdr)) |
255 | |
256 | /* |
257 | * Internet Protocol (IP) + UDP header. |
258 | */ |
259 | struct ip_udp_hdr { |
260 | uchar ip_hl_v; /* header length and version */ |
261 | uchar ip_tos; /* type of service */ |
262 | ushort ip_len; /* total length */ |
263 | ushort ip_id; /* identification */ |
264 | ushort ip_off; /* fragment offset field */ |
265 | uchar ip_ttl; /* time to live */ |
266 | uchar ip_p; /* protocol */ |
267 | ushort ip_sum; /* checksum */ |
268 | IPaddr_t ip_src; /* Source IP address */ |
269 | IPaddr_t ip_dst; /* Destination IP address */ |
270 | ushort udp_src; /* UDP source port */ |
271 | ushort udp_dst; /* UDP destination port */ |
272 | ushort udp_len; /* Length of UDP packet */ |
273 | ushort udp_xsum; /* Checksum */ |
274 | }; |
275 | |
276 | #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr)) |
277 | #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE) |
278 | |
279 | /* |
280 | * Address Resolution Protocol (ARP) header. |
281 | */ |
282 | struct arp_hdr { |
283 | ushort ar_hrd; /* Format of hardware address */ |
284 | # define ARP_ETHER 1 /* Ethernet hardware address */ |
285 | ushort ar_pro; /* Format of protocol address */ |
286 | uchar ar_hln; /* Length of hardware address */ |
287 | # define ARP_HLEN 6 |
288 | uchar ar_pln; /* Length of protocol address */ |
289 | # define ARP_PLEN 4 |
290 | ushort ar_op; /* Operation */ |
291 | # define ARPOP_REQUEST 1 /* Request to resolve address */ |
292 | # define ARPOP_REPLY 2 /* Response to previous request */ |
293 | |
294 | # define RARPOP_REQUEST 3 /* Request to resolve address */ |
295 | # define RARPOP_REPLY 4 /* Response to previous request */ |
296 | |
297 | /* |
298 | * The remaining fields are variable in size, according to |
299 | * the sizes above, and are defined as appropriate for |
300 | * specific hardware/protocol combinations. |
301 | */ |
302 | uchar ar_data[0]; |
303 | #define ar_sha ar_data[0] |
304 | #define ar_spa ar_data[ARP_HLEN] |
305 | #define ar_tha ar_data[ARP_HLEN + ARP_PLEN] |
306 | #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN] |
307 | #if 0 |
308 | uchar ar_sha[]; /* Sender hardware address */ |
309 | uchar ar_spa[]; /* Sender protocol address */ |
310 | uchar ar_tha[]; /* Target hardware address */ |
311 | uchar ar_tpa[]; /* Target protocol address */ |
312 | #endif /* 0 */ |
313 | }; |
314 | |
315 | #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */ |
316 | |
317 | /* |
318 | * ICMP stuff (just enough to handle (host) redirect messages) |
319 | */ |
320 | #define ICMP_ECHO_REPLY 0 /* Echo reply */ |
321 | #define ICMP_NOT_REACH 3 /* Detination unreachable */ |
322 | #define ICMP_REDIRECT 5 /* Redirect (change route) */ |
323 | #define ICMP_ECHO_REQUEST 8 /* Echo request */ |
324 | |
325 | /* Codes for REDIRECT. */ |
326 | #define ICMP_REDIR_NET 0 /* Redirect Net */ |
327 | #define ICMP_REDIR_HOST 1 /* Redirect Host */ |
328 | |
329 | /* Codes for NOT_REACH */ |
330 | #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */ |
331 | |
332 | struct icmp_hdr { |
333 | uchar type; |
334 | uchar code; |
335 | ushort checksum; |
336 | union { |
337 | struct { |
338 | ushort id; |
339 | ushort sequence; |
340 | } echo; |
341 | ulong gateway; |
342 | struct { |
343 | ushort unused; |
344 | ushort mtu; |
345 | } frag; |
346 | uchar data[0]; |
347 | } un; |
348 | }; |
349 | |
350 | #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr)) |
351 | #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE) |
352 | |
353 | /* |
354 | * Maximum packet size; used to allocate packet storage. |
355 | * TFTP packets can be 524 bytes + IP header + ethernet header. |
356 | * Lets be conservative, and go for 38 * 16. (Must also be |
357 | * a multiple of 32 bytes). |
358 | */ |
359 | /* |
360 | * AS.HARNOIS : Better to set PKTSIZE to maximum size because |
361 | * traffic type is not always controlled |
362 | * maximum packet size = 1518 |
363 | * maximum packet size and multiple of 32 bytes = 1536 |
364 | */ |
365 | #define PKTSIZE 1518 |
366 | #define PKTSIZE_ALIGN 1536 |
367 | /*#define PKTSIZE 608*/ |
368 | |
369 | /* |
370 | * Maximum receive ring size; that is, the number of packets |
371 | * we can buffer before overflow happens. Basically, this just |
372 | * needs to be enough to prevent a packet being discarded while |
373 | * we are processing the previous one. |
374 | */ |
375 | #define RINGSZ 4 |
376 | #define RINGSZ_LOG2 2 |
377 | |
378 | /**********************************************************************/ |
379 | /* |
380 | * Globals. |
381 | * |
382 | * Note: |
383 | * |
384 | * All variables of type IPaddr_t are stored in NETWORK byte order |
385 | * (big endian). |
386 | */ |
387 | |
388 | /* net.c */ |
389 | /** BOOTP EXTENTIONS **/ |
390 | extern IPaddr_t NetOurGatewayIP; /* Our gateway IP address */ |
391 | extern IPaddr_t NetOurSubnetMask; /* Our subnet mask (0 = unknown) */ |
392 | extern IPaddr_t NetOurDNSIP; /* Our Domain Name Server (0 = unknown) */ |
393 | #if defined(CONFIG_BOOTP_DNS2) |
394 | extern IPaddr_t NetOurDNS2IP; /* Our 2nd Domain Name Server (0 = unknown) */ |
395 | #endif |
396 | extern char NetOurNISDomain[32]; /* Our NIS domain */ |
397 | extern char NetOurHostName[32]; /* Our hostname */ |
398 | extern char NetOurRootPath[64]; /* Our root path */ |
399 | extern ushort NetBootFileSize; /* Our boot file size in blocks */ |
400 | /** END OF BOOTP EXTENTIONS **/ |
401 | extern ulong NetBootFileXferSize; /* size of bootfile in bytes */ |
402 | extern uchar NetOurEther[6]; /* Our ethernet address */ |
403 | extern uchar NetServerEther[6]; /* Boot server enet address */ |
404 | extern IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */ |
405 | extern IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */ |
406 | extern uchar *NetTxPacket; /* THE transmit packet */ |
407 | extern uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */ |
408 | extern uchar *NetRxPacket; /* Current receive packet */ |
409 | extern int NetRxPacketLen; /* Current rx packet length */ |
410 | extern unsigned NetIPID; /* IP ID (counting) */ |
411 | extern uchar NetBcastAddr[6]; /* Ethernet boardcast address */ |
412 | extern uchar NetEtherNullAddr[6]; |
413 | |
414 | #define VLAN_NONE 4095 /* untagged */ |
415 | #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */ |
416 | extern ushort NetOurVLAN; /* Our VLAN */ |
417 | extern ushort NetOurNativeVLAN; /* Our Native VLAN */ |
418 | |
419 | extern int NetRestartWrap; /* Tried all network devices */ |
420 | |
421 | enum proto_t { |
422 | BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP, |
423 | TFTPSRV, TFTPPUT, LINKLOCAL |
424 | }; |
425 | |
426 | /* from net/net.c */ |
427 | extern char BootFile[128]; /* Boot File name */ |
428 | |
429 | #if defined(CONFIG_CMD_DNS) |
430 | extern char *NetDNSResolve; /* The host to resolve */ |
431 | extern char *NetDNSenvvar; /* the env var to put the ip into */ |
432 | #endif |
433 | |
434 | #if defined(CONFIG_CMD_PING) |
435 | extern IPaddr_t NetPingIP; /* the ip address to ping */ |
436 | #endif |
437 | |
438 | #if defined(CONFIG_CMD_CDP) |
439 | /* when CDP completes these hold the return values */ |
440 | extern ushort CDPNativeVLAN; /* CDP returned native VLAN */ |
441 | extern ushort CDPApplianceVLAN; /* CDP returned appliance VLAN */ |
442 | |
443 | /* |
444 | * Check for a CDP packet by examining the received MAC address field |
445 | */ |
446 | static inline int is_cdp_packet(const uchar *et_addr) |
447 | { |
448 | extern const uchar NetCDPAddr[6]; |
449 | |
450 | return memcmp(et_addr, NetCDPAddr, 6) == 0; |
451 | } |
452 | #endif |
453 | |
454 | #if defined(CONFIG_CMD_SNTP) |
455 | extern IPaddr_t NetNtpServerIP; /* the ip address to NTP */ |
456 | extern int NetTimeOffset; /* offset time from UTC */ |
457 | #endif |
458 | |
459 | #if defined(CONFIG_MCAST_TFTP) |
460 | extern IPaddr_t Mcast_addr; |
461 | #endif |
462 | |
463 | /* Initialize the network adapter */ |
464 | extern void net_init(void); |
465 | extern int NetLoop(enum proto_t); |
466 | |
467 | /* Shutdown adapters and cleanup */ |
468 | extern void NetStop(void); |
469 | |
470 | /* Load failed. Start again. */ |
471 | extern void NetStartAgain(void); |
472 | |
473 | /* Get size of the ethernet header when we send */ |
474 | extern int NetEthHdrSize(void); |
475 | |
476 | /* Set ethernet header; returns the size of the header */ |
477 | extern int NetSetEther(uchar *, uchar *, uint); |
478 | extern int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot); |
479 | |
480 | /* Set IP header */ |
481 | extern void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source); |
482 | extern void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport, |
483 | int sport, int len); |
484 | |
485 | /* Checksum */ |
486 | extern int NetCksumOk(uchar *, int); /* Return true if cksum OK */ |
487 | extern uint NetCksum(uchar *, int); /* Calculate the checksum */ |
488 | |
489 | /* Callbacks */ |
490 | extern rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */ |
491 | extern void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */ |
492 | extern rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */ |
493 | extern void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */ |
494 | extern void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */ |
495 | extern void NetSetTimeout(ulong, thand_f *);/* Set timeout handler */ |
496 | |
497 | /* Network loop state */ |
498 | enum net_loop_state { |
499 | NETLOOP_CONTINUE, |
500 | NETLOOP_RESTART, |
501 | NETLOOP_SUCCESS, |
502 | NETLOOP_FAIL |
503 | }; |
504 | extern enum net_loop_state net_state; |
505 | |
506 | static inline void net_set_state(enum net_loop_state state) |
507 | { |
508 | debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state); |
509 | net_state = state; |
510 | } |
511 | |
512 | /* Transmit a packet */ |
513 | static inline void NetSendPacket(uchar *pkt, int len) |
514 | { |
515 | (void) eth_send(pkt, len); |
516 | } |
517 | |
518 | /* |
519 | * Transmit "NetTxPacket" as UDP packet, performing ARP request if needed |
520 | * (ether will be populated) |
521 | * |
522 | * @param ether Raw packet buffer |
523 | * @param dest IP address to send the datagram to |
524 | * @param dport Destination UDP port |
525 | * @param sport Source UDP port |
526 | * @param payload_len Length of data after the UDP header |
527 | */ |
528 | extern int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, |
529 | int sport, int payload_len); |
530 | |
531 | /* Processes a received packet */ |
532 | extern void NetReceive(uchar *, int); |
533 | |
534 | #ifdef CONFIG_NETCONSOLE |
535 | void NcStart(void); |
536 | int nc_input_packet(uchar *pkt, IPaddr_t src_ip, unsigned dest_port, |
537 | unsigned src_port, unsigned len); |
538 | #endif |
539 | |
540 | static inline __attribute__((always_inline)) int eth_is_on_demand_init(void) |
541 | { |
542 | #ifdef CONFIG_NETCONSOLE |
543 | extern enum proto_t net_loop_last_protocol; |
544 | |
545 | return net_loop_last_protocol != NETCONS; |
546 | #else |
547 | return 1; |
548 | #endif |
549 | } |
550 | |
551 | static inline void eth_set_last_protocol(int protocol) |
552 | { |
553 | #ifdef CONFIG_NETCONSOLE |
554 | extern enum proto_t net_loop_last_protocol; |
555 | |
556 | net_loop_last_protocol = protocol; |
557 | #endif |
558 | } |
559 | |
560 | /* |
561 | * Check if autoload is enabled. If so, use either NFS or TFTP to download |
562 | * the boot file. |
563 | */ |
564 | void net_auto_load(void); |
565 | |
566 | /* |
567 | * The following functions are a bit ugly, but necessary to deal with |
568 | * alignment restrictions on ARM. |
569 | * |
570 | * We're using inline functions, which had the smallest memory |
571 | * footprint in our tests. |
572 | */ |
573 | /* return IP *in network byteorder* */ |
574 | static inline IPaddr_t NetReadIP(void *from) |
575 | { |
576 | IPaddr_t ip; |
577 | |
578 | memcpy((void *)&ip, (void *)from, sizeof(ip)); |
579 | return ip; |
580 | } |
581 | |
582 | /* return ulong *in network byteorder* */ |
583 | static inline ulong NetReadLong(uint *from) |
584 | { |
585 | uint l; |
586 | |
587 | memcpy((void *)&l, (void *)from, sizeof(l)); |
588 | return l; |
589 | } |
590 | |
591 | /* write IP *in network byteorder* */ |
592 | static inline void NetWriteIP(void *to, IPaddr_t ip) |
593 | { |
594 | memcpy(to, (void *)&ip, sizeof(ip)); |
595 | } |
596 | |
597 | /* copy IP */ |
598 | static inline void NetCopyIP(void *to, void *from) |
599 | { |
600 | memcpy((void *)to, from, sizeof(IPaddr_t)); |
601 | } |
602 | |
603 | /* copy ulong */ |
604 | static inline void NetCopyLong(uint *to, uint *from) |
605 | { |
606 | memcpy((void *)to, (void *)from, sizeof(uint)); |
607 | } |
608 | |
609 | /** |
610 | * is_zero_ether_addr - Determine if give Ethernet address is all zeros. |
611 | * @addr: Pointer to a six-byte array containing the Ethernet address |
612 | * |
613 | * Return true if the address is all zeroes. |
614 | */ |
615 | static inline int is_zero_ether_addr(const u8 *addr) |
616 | { |
617 | return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]); |
618 | } |
619 | |
620 | /** |
621 | * is_multicast_ether_addr - Determine if the Ethernet address is a multicast. |
622 | * @addr: Pointer to a six-byte array containing the Ethernet address |
623 | * |
624 | * Return true if the address is a multicast address. |
625 | * By definition the broadcast address is also a multicast address. |
626 | */ |
627 | static inline int is_multicast_ether_addr(const u8 *addr) |
628 | { |
629 | return 0x01 & addr[0]; |
630 | } |
631 | |
632 | /* |
633 | * is_broadcast_ether_addr - Determine if the Ethernet address is broadcast |
634 | * @addr: Pointer to a six-byte array containing the Ethernet address |
635 | * |
636 | * Return true if the address is the broadcast address. |
637 | */ |
638 | static inline int is_broadcast_ether_addr(const u8 *addr) |
639 | { |
640 | return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == |
641 | 0xff; |
642 | } |
643 | |
644 | /* |
645 | * is_valid_ether_addr - Determine if the given Ethernet address is valid |
646 | * @addr: Pointer to a six-byte array containing the Ethernet address |
647 | * |
648 | * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not |
649 | * a multicast address, and is not FF:FF:FF:FF:FF:FF. |
650 | * |
651 | * Return true if the address is valid. |
652 | */ |
653 | static inline int is_valid_ether_addr(const u8 *addr) |
654 | { |
655 | /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to |
656 | * explicitly check for it here. */ |
657 | return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr); |
658 | } |
659 | |
660 | /** |
661 | * eth_random_addr - Generate software assigned random Ethernet address |
662 | * @addr: Pointer to a six-byte array containing the Ethernet address |
663 | * |
664 | * Generate a random Ethernet address (MAC) that is not multicast |
665 | * and has the local assigned bit set. |
666 | */ |
667 | static inline void eth_random_addr(uchar *addr) |
668 | { |
669 | int i; |
670 | unsigned int seed = get_timer(0); |
671 | |
672 | for (i = 0; i < 6; i++) |
673 | addr[i] = rand_r(&seed); |
674 | |
675 | addr[0] &= 0xfe; /* clear multicast bit */ |
676 | addr[0] |= 0x02; /* set local assignment bit (IEEE802) */ |
677 | } |
678 | |
679 | /* Convert an IP address to a string */ |
680 | extern void ip_to_string(IPaddr_t x, char *s); |
681 | |
682 | /* Convert a string to ip address */ |
683 | extern IPaddr_t string_to_ip(const char *s); |
684 | |
685 | /* Convert a VLAN id to a string */ |
686 | extern void VLAN_to_string(ushort x, char *s); |
687 | |
688 | /* Convert a string to a vlan id */ |
689 | extern ushort string_to_VLAN(const char *s); |
690 | |
691 | /* read a VLAN id from an environment variable */ |
692 | extern ushort getenv_VLAN(char *); |
693 | |
694 | /* copy a filename (allow for "..." notation, limit length) */ |
695 | extern void copy_filename(char *dst, const char *src, int size); |
696 | |
697 | /* get a random source port */ |
698 | extern unsigned int random_port(void); |
699 | |
700 | /* Update U-Boot over TFTP */ |
701 | extern int update_tftp(ulong addr); |
702 | |
703 | /**********************************************************************/ |
704 | |
705 | #endif /* __NET_H__ */ |
706 |