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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 | struct in_addr { | |
43 | __be32 s_addr; | |
44 | }; | |
45 | ||
46 | /** | |
47 | * An incoming packet handler. | |
48 | * @param pkt pointer to the application packet | |
49 | * @param dport destination UDP port | |
50 | * @param sip source IP address | |
51 | * @param sport source UDP port | |
52 | * @param len packet length | |
53 | */ | |
54 | typedef void rxhand_f(uchar *pkt, unsigned dport, | |
55 | struct in_addr sip, unsigned sport, | |
56 | unsigned len); | |
57 | ||
58 | /** | |
59 | * An incoming ICMP packet handler. | |
60 | * @param type ICMP type | |
61 | * @param code ICMP code | |
62 | * @param dport destination UDP port | |
63 | * @param sip source IP address | |
64 | * @param sport source UDP port | |
65 | * @param pkt pointer to the ICMP packet data | |
66 | * @param len packet length | |
67 | */ | |
68 | typedef void rxhand_icmp_f(unsigned type, unsigned code, unsigned dport, | |
69 | struct in_addr sip, unsigned sport, uchar *pkt, unsigned len); | |
70 | ||
71 | /* | |
72 | * A timeout handler. Called after time interval has expired. | |
73 | */ | |
74 | typedef void thand_f(void); | |
75 | ||
76 | enum eth_state_t { | |
77 | ETH_STATE_INIT, | |
78 | ETH_STATE_PASSIVE, | |
79 | ETH_STATE_ACTIVE | |
80 | }; | |
81 | ||
82 | #ifdef CONFIG_DM_ETH | |
83 | /** | |
84 | * struct eth_pdata - Platform data for Ethernet MAC controllers | |
85 | * | |
86 | * @iobase: The base address of the hardware registers | |
87 | * @enetaddr: The Ethernet MAC address that is loaded from EEPROM or env | |
88 | * @phy_interface: PHY interface to use - see PHY_INTERFACE_MODE_... | |
89 | */ | |
90 | struct eth_pdata { | |
91 | phys_addr_t iobase; | |
92 | unsigned char enetaddr[6]; | |
93 | int phy_interface; | |
94 | }; | |
95 | ||
96 | enum eth_recv_flags { | |
97 | /* | |
98 | * Check hardware device for new packets (otherwise only return those | |
99 | * which are already in the memory buffer ready to process) | |
100 | */ | |
101 | ETH_RECV_CHECK_DEVICE = 1 << 0, | |
102 | }; | |
103 | ||
104 | /** | |
105 | * struct eth_ops - functions of Ethernet MAC controllers | |
106 | * | |
107 | * start: Prepare the hardware to send and receive packets | |
108 | * send: Send the bytes passed in "packet" as a packet on the wire | |
109 | * recv: Check if the hardware received a packet. If so, set the pointer to the | |
110 | * packet buffer in the packetp parameter. If not, return an error or 0 to | |
111 | * indicate that the hardware receive FIFO is empty. If 0 is returned, the | |
112 | * network stack will not process the empty packet, but free_pkt() will be | |
113 | * called if supplied | |
114 | * free_pkt: Give the driver an opportunity to manage its packet buffer memory | |
115 | * when the network stack is finished processing it. This will only be | |
116 | * called when no error was returned from recv - optional | |
117 | * stop: Stop the hardware from looking for packets - may be called even if | |
118 | * state == PASSIVE | |
119 | * mcast: Join or leave a multicast group (for TFTP) - optional | |
120 | * write_hwaddr: Write a MAC address to the hardware (used to pass it to Linux | |
121 | * on some platforms like ARM). This function expects the | |
122 | * eth_pdata::enetaddr field to be populated. The method can | |
123 | * return -ENOSYS to indicate that this is not implemented for | |
124 | this hardware - optional. | |
125 | * read_rom_hwaddr: Some devices have a backup of the MAC address stored in a | |
126 | * ROM on the board. This is how the driver should expose it | |
127 | * to the network stack. This function should fill in the | |
128 | * eth_pdata::enetaddr field - optional | |
129 | */ | |
130 | struct eth_ops { | |
131 | int (*start)(struct udevice *dev); | |
132 | int (*send)(struct udevice *dev, void *packet, int length); | |
133 | int (*recv)(struct udevice *dev, int flags, uchar **packetp); | |
134 | int (*free_pkt)(struct udevice *dev, uchar *packet, int length); | |
135 | void (*stop)(struct udevice *dev); | |
136 | #ifdef CONFIG_MCAST_TFTP | |
137 | int (*mcast)(struct udevice *dev, const u8 *enetaddr, int join); | |
138 | #endif | |
139 | int (*write_hwaddr)(struct udevice *dev); | |
140 | int (*read_rom_hwaddr)(struct udevice *dev); | |
141 | }; | |
142 | ||
143 | #define eth_get_ops(dev) ((struct eth_ops *)(dev)->driver->ops) | |
144 | ||
145 | struct udevice *eth_get_dev(void); /* get the current device */ | |
146 | /* | |
147 | * The devname can be either an exact name given by the driver or device tree | |
148 | * or it can be an alias of the form "eth%d" | |
149 | */ | |
150 | struct udevice *eth_get_dev_by_name(const char *devname); | |
151 | unsigned char *eth_get_ethaddr(void); /* get the current device MAC */ | |
152 | ||
153 | /* Used only when NetConsole is enabled */ | |
154 | int eth_is_active(struct udevice *dev); /* Test device for active state */ | |
155 | int eth_init_state_only(void); /* Set active state */ | |
156 | void eth_halt_state_only(void); /* Set passive state */ | |
157 | #endif | |
158 | ||
159 | #ifndef CONFIG_DM_ETH | |
160 | struct eth_device { | |
161 | char name[16]; | |
162 | unsigned char enetaddr[6]; | |
163 | phys_addr_t iobase; | |
164 | int state; | |
165 | ||
166 | int (*init)(struct eth_device *, bd_t *); | |
167 | int (*send)(struct eth_device *, void *packet, int length); | |
168 | int (*recv)(struct eth_device *); | |
169 | void (*halt)(struct eth_device *); | |
170 | #ifdef CONFIG_MCAST_TFTP | |
171 | int (*mcast)(struct eth_device *, const u8 *enetaddr, u8 set); | |
172 | #endif | |
173 | int (*write_hwaddr)(struct eth_device *); | |
174 | struct eth_device *next; | |
175 | int index; | |
176 | void *priv; | |
177 | }; | |
178 | ||
179 | int eth_register(struct eth_device *dev);/* Register network device */ | |
180 | int eth_unregister(struct eth_device *dev);/* Remove network device */ | |
181 | ||
182 | extern struct eth_device *eth_current; | |
183 | ||
184 | static inline __attribute__((always_inline)) | |
185 | struct eth_device *eth_get_dev(void) | |
186 | { | |
187 | return eth_current; | |
188 | } | |
189 | struct eth_device *eth_get_dev_by_name(const char *devname); | |
190 | struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */ | |
191 | ||
192 | /* get the current device MAC */ | |
193 | static inline unsigned char *eth_get_ethaddr(void) | |
194 | { | |
195 | if (eth_current) | |
196 | return eth_current->enetaddr; | |
197 | return NULL; | |
198 | } | |
199 | ||
200 | /* Used only when NetConsole is enabled */ | |
201 | int eth_is_active(struct eth_device *dev); /* Test device for active state */ | |
202 | /* Set active state */ | |
203 | static inline __attribute__((always_inline)) int eth_init_state_only(void) | |
204 | { | |
205 | eth_get_dev()->state = ETH_STATE_ACTIVE; | |
206 | ||
207 | return 0; | |
208 | } | |
209 | /* Set passive state */ | |
210 | static inline __attribute__((always_inline)) void eth_halt_state_only(void) | |
211 | { | |
212 | eth_get_dev()->state = ETH_STATE_PASSIVE; | |
213 | } | |
214 | ||
215 | /* | |
216 | * Set the hardware address for an ethernet interface based on 'eth%daddr' | |
217 | * environment variable (or just 'ethaddr' if eth_number is 0). | |
218 | * Args: | |
219 | * base_name - base name for device (normally "eth") | |
220 | * eth_number - value of %d (0 for first device of this type) | |
221 | * Returns: | |
222 | * 0 is success, non-zero is error status from driver. | |
223 | */ | |
224 | int eth_write_hwaddr(struct eth_device *dev, const char *base_name, | |
225 | int eth_number); | |
226 | ||
227 | int usb_eth_initialize(bd_t *bi); | |
228 | #endif | |
229 | ||
230 | int eth_initialize(void); /* Initialize network subsystem */ | |
231 | void eth_try_another(int first_restart); /* Change the device */ | |
232 | void eth_set_current(void); /* set nterface to ethcur var */ | |
233 | ||
234 | int eth_get_dev_index(void); /* get the device index */ | |
235 | void eth_parse_enetaddr(const char *addr, uchar *enetaddr); | |
236 | int eth_getenv_enetaddr(const char *name, uchar *enetaddr); | |
237 | int eth_setenv_enetaddr(const char *name, const uchar *enetaddr); | |
238 | ||
239 | /* | |
240 | * Get the hardware address for an ethernet interface . | |
241 | * Args: | |
242 | * base_name - base name for device (normally "eth") | |
243 | * index - device index number (0 for first) | |
244 | * enetaddr - returns 6 byte hardware address | |
245 | * Returns: | |
246 | * Return true if the address is valid. | |
247 | */ | |
248 | int eth_getenv_enetaddr_by_index(const char *base_name, int index, | |
249 | uchar *enetaddr); | |
250 | ||
251 | int eth_init(void); /* Initialize the device */ | |
252 | int eth_send(void *packet, int length); /* Send a packet */ | |
253 | ||
254 | #ifdef CONFIG_API | |
255 | int eth_receive(void *packet, int length); /* Receive a packet*/ | |
256 | extern void (*push_packet)(void *packet, int length); | |
257 | #endif | |
258 | int eth_rx(void); /* Check for received packets */ | |
259 | void eth_halt(void); /* stop SCC */ | |
260 | const char *eth_get_name(void); /* get name of current device */ | |
261 | ||
262 | #ifdef CONFIG_MCAST_TFTP | |
263 | int eth_mcast_join(struct in_addr mcast_addr, int join); | |
264 | u32 ether_crc(size_t len, unsigned char const *p); | |
265 | #endif | |
266 | ||
267 | ||
268 | /**********************************************************************/ | |
269 | /* | |
270 | * Protocol headers. | |
271 | */ | |
272 | ||
273 | /* | |
274 | * Ethernet header | |
275 | */ | |
276 | ||
277 | struct ethernet_hdr { | |
278 | u8 et_dest[6]; /* Destination node */ | |
279 | u8 et_src[6]; /* Source node */ | |
280 | u16 et_protlen; /* Protocol or length */ | |
281 | }; | |
282 | ||
283 | /* Ethernet header size */ | |
284 | #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr)) | |
285 | ||
286 | #define ETH_FCS_LEN 4 /* Octets in the FCS */ | |
287 | ||
288 | struct e802_hdr { | |
289 | u8 et_dest[6]; /* Destination node */ | |
290 | u8 et_src[6]; /* Source node */ | |
291 | u16 et_protlen; /* Protocol or length */ | |
292 | u8 et_dsap; /* 802 DSAP */ | |
293 | u8 et_ssap; /* 802 SSAP */ | |
294 | u8 et_ctl; /* 802 control */ | |
295 | u8 et_snap1; /* SNAP */ | |
296 | u8 et_snap2; | |
297 | u8 et_snap3; | |
298 | u16 et_prot; /* 802 protocol */ | |
299 | }; | |
300 | ||
301 | /* 802 + SNAP + ethernet header size */ | |
302 | #define E802_HDR_SIZE (sizeof(struct e802_hdr)) | |
303 | ||
304 | /* | |
305 | * Virtual LAN Ethernet header | |
306 | */ | |
307 | struct vlan_ethernet_hdr { | |
308 | u8 vet_dest[6]; /* Destination node */ | |
309 | u8 vet_src[6]; /* Source node */ | |
310 | u16 vet_vlan_type; /* PROT_VLAN */ | |
311 | u16 vet_tag; /* TAG of VLAN */ | |
312 | u16 vet_type; /* protocol type */ | |
313 | }; | |
314 | ||
315 | /* VLAN Ethernet header size */ | |
316 | #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr)) | |
317 | ||
318 | #define PROT_IP 0x0800 /* IP protocol */ | |
319 | #define PROT_ARP 0x0806 /* IP ARP protocol */ | |
320 | #define PROT_RARP 0x8035 /* IP ARP protocol */ | |
321 | #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */ | |
322 | ||
323 | #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */ | |
324 | #define IPPROTO_UDP 17 /* User Datagram Protocol */ | |
325 | ||
326 | /* | |
327 | * Internet Protocol (IP) header. | |
328 | */ | |
329 | struct ip_hdr { | |
330 | u8 ip_hl_v; /* header length and version */ | |
331 | u8 ip_tos; /* type of service */ | |
332 | u16 ip_len; /* total length */ | |
333 | u16 ip_id; /* identification */ | |
334 | u16 ip_off; /* fragment offset field */ | |
335 | u8 ip_ttl; /* time to live */ | |
336 | u8 ip_p; /* protocol */ | |
337 | u16 ip_sum; /* checksum */ | |
338 | struct in_addr ip_src; /* Source IP address */ | |
339 | struct in_addr ip_dst; /* Destination IP address */ | |
340 | }; | |
341 | ||
342 | #define IP_OFFS 0x1fff /* ip offset *= 8 */ | |
343 | #define IP_FLAGS 0xe000 /* first 3 bits */ | |
344 | #define IP_FLAGS_RES 0x8000 /* reserved */ | |
345 | #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */ | |
346 | #define IP_FLAGS_MFRAG 0x2000 /* more fragments */ | |
347 | ||
348 | #define IP_HDR_SIZE (sizeof(struct ip_hdr)) | |
349 | ||
350 | /* | |
351 | * Internet Protocol (IP) + UDP header. | |
352 | */ | |
353 | struct ip_udp_hdr { | |
354 | u8 ip_hl_v; /* header length and version */ | |
355 | u8 ip_tos; /* type of service */ | |
356 | u16 ip_len; /* total length */ | |
357 | u16 ip_id; /* identification */ | |
358 | u16 ip_off; /* fragment offset field */ | |
359 | u8 ip_ttl; /* time to live */ | |
360 | u8 ip_p; /* protocol */ | |
361 | u16 ip_sum; /* checksum */ | |
362 | struct in_addr ip_src; /* Source IP address */ | |
363 | struct in_addr ip_dst; /* Destination IP address */ | |
364 | u16 udp_src; /* UDP source port */ | |
365 | u16 udp_dst; /* UDP destination port */ | |
366 | u16 udp_len; /* Length of UDP packet */ | |
367 | u16 udp_xsum; /* Checksum */ | |
368 | }; | |
369 | ||
370 | #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr)) | |
371 | #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE) | |
372 | ||
373 | /* | |
374 | * Address Resolution Protocol (ARP) header. | |
375 | */ | |
376 | struct arp_hdr { | |
377 | u16 ar_hrd; /* Format of hardware address */ | |
378 | # define ARP_ETHER 1 /* Ethernet hardware address */ | |
379 | u16 ar_pro; /* Format of protocol address */ | |
380 | u8 ar_hln; /* Length of hardware address */ | |
381 | # define ARP_HLEN 6 | |
382 | u8 ar_pln; /* Length of protocol address */ | |
383 | # define ARP_PLEN 4 | |
384 | u16 ar_op; /* Operation */ | |
385 | # define ARPOP_REQUEST 1 /* Request to resolve address */ | |
386 | # define ARPOP_REPLY 2 /* Response to previous request */ | |
387 | ||
388 | # define RARPOP_REQUEST 3 /* Request to resolve address */ | |
389 | # define RARPOP_REPLY 4 /* Response to previous request */ | |
390 | ||
391 | /* | |
392 | * The remaining fields are variable in size, according to | |
393 | * the sizes above, and are defined as appropriate for | |
394 | * specific hardware/protocol combinations. | |
395 | */ | |
396 | u8 ar_data[0]; | |
397 | #define ar_sha ar_data[0] | |
398 | #define ar_spa ar_data[ARP_HLEN] | |
399 | #define ar_tha ar_data[ARP_HLEN + ARP_PLEN] | |
400 | #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN] | |
401 | #if 0 | |
402 | u8 ar_sha[]; /* Sender hardware address */ | |
403 | u8 ar_spa[]; /* Sender protocol address */ | |
404 | u8 ar_tha[]; /* Target hardware address */ | |
405 | u8 ar_tpa[]; /* Target protocol address */ | |
406 | #endif /* 0 */ | |
407 | }; | |
408 | ||
409 | #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */ | |
410 | ||
411 | /* | |
412 | * ICMP stuff (just enough to handle (host) redirect messages) | |
413 | */ | |
414 | #define ICMP_ECHO_REPLY 0 /* Echo reply */ | |
415 | #define ICMP_NOT_REACH 3 /* Detination unreachable */ | |
416 | #define ICMP_REDIRECT 5 /* Redirect (change route) */ | |
417 | #define ICMP_ECHO_REQUEST 8 /* Echo request */ | |
418 | ||
419 | /* Codes for REDIRECT. */ | |
420 | #define ICMP_REDIR_NET 0 /* Redirect Net */ | |
421 | #define ICMP_REDIR_HOST 1 /* Redirect Host */ | |
422 | ||
423 | /* Codes for NOT_REACH */ | |
424 | #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */ | |
425 | ||
426 | struct icmp_hdr { | |
427 | u8 type; | |
428 | u8 code; | |
429 | u16 checksum; | |
430 | union { | |
431 | struct { | |
432 | u16 id; | |
433 | u16 sequence; | |
434 | } echo; | |
435 | u32 gateway; | |
436 | struct { | |
437 | u16 unused; | |
438 | u16 mtu; | |
439 | } frag; | |
440 | u8 data[0]; | |
441 | } un; | |
442 | }; | |
443 | ||
444 | #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr)) | |
445 | #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE) | |
446 | ||
447 | /* | |
448 | * Maximum packet size; used to allocate packet storage. | |
449 | * TFTP packets can be 524 bytes + IP header + ethernet header. | |
450 | * Lets be conservative, and go for 38 * 16. (Must also be | |
451 | * a multiple of 32 bytes). | |
452 | */ | |
453 | /* | |
454 | * AS.HARNOIS : Better to set PKTSIZE to maximum size because | |
455 | * traffic type is not always controlled | |
456 | * maximum packet size = 1518 | |
457 | * maximum packet size and multiple of 32 bytes = 1536 | |
458 | */ | |
459 | #define PKTSIZE 1518 | |
460 | #define PKTSIZE_ALIGN 1536 | |
461 | /*#define PKTSIZE 608*/ | |
462 | ||
463 | /* | |
464 | * Maximum receive ring size; that is, the number of packets | |
465 | * we can buffer before overflow happens. Basically, this just | |
466 | * needs to be enough to prevent a packet being discarded while | |
467 | * we are processing the previous one. | |
468 | */ | |
469 | #define RINGSZ 4 | |
470 | #define RINGSZ_LOG2 2 | |
471 | ||
472 | /**********************************************************************/ | |
473 | /* | |
474 | * Globals. | |
475 | * | |
476 | * Note: | |
477 | * | |
478 | * All variables of type struct in_addr are stored in NETWORK byte order | |
479 | * (big endian). | |
480 | */ | |
481 | ||
482 | /* net.c */ | |
483 | /** BOOTP EXTENTIONS **/ | |
484 | extern struct in_addr net_gateway; /* Our gateway IP address */ | |
485 | extern struct in_addr net_netmask; /* Our subnet mask (0 = unknown) */ | |
486 | /* Our Domain Name Server (0 = unknown) */ | |
487 | extern struct in_addr net_dns_server; | |
488 | #if defined(CONFIG_BOOTP_DNS2) | |
489 | /* Our 2nd Domain Name Server (0 = unknown) */ | |
490 | extern struct in_addr net_dns_server2; | |
491 | #endif | |
492 | extern char net_nis_domain[32]; /* Our IS domain */ | |
493 | extern char net_hostname[32]; /* Our hostname */ | |
494 | extern char net_root_path[64]; /* Our root path */ | |
495 | /** END OF BOOTP EXTENTIONS **/ | |
496 | extern u8 net_ethaddr[6]; /* Our ethernet address */ | |
497 | extern u8 net_server_ethaddr[6]; /* Boot server enet address */ | |
498 | extern struct in_addr net_ip; /* Our IP addr (0 = unknown) */ | |
499 | extern struct in_addr net_server_ip; /* Server IP addr (0 = unknown) */ | |
500 | extern uchar *net_tx_packet; /* THE transmit packet */ | |
501 | extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */ | |
502 | extern uchar *net_rx_packet; /* Current receive packet */ | |
503 | extern int net_rx_packet_len; /* Current rx packet length */ | |
504 | extern const u8 net_bcast_ethaddr[6]; /* Ethernet broadcast address */ | |
505 | extern const u8 net_null_ethaddr[6]; | |
506 | ||
507 | #define VLAN_NONE 4095 /* untagged */ | |
508 | #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */ | |
509 | extern ushort net_our_vlan; /* Our VLAN */ | |
510 | extern ushort net_native_vlan; /* Our Native VLAN */ | |
511 | ||
512 | extern int net_restart_wrap; /* Tried all network devices */ | |
513 | ||
514 | enum proto_t { | |
515 | BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP, | |
516 | TFTPSRV, TFTPPUT, LINKLOCAL | |
517 | }; | |
518 | ||
519 | extern char net_boot_file_name[1024];/* Boot File name */ | |
520 | /* The actual transferred size of the bootfile (in bytes) */ | |
521 | extern u32 net_boot_file_size; | |
522 | /* Boot file size in blocks as reported by the DHCP server */ | |
523 | extern u32 net_boot_file_expected_size_in_blocks; | |
524 | ||
525 | #if defined(CONFIG_CMD_DNS) | |
526 | extern char *net_dns_resolve; /* The host to resolve */ | |
527 | extern char *net_dns_env_var; /* the env var to put the ip into */ | |
528 | #endif | |
529 | ||
530 | #if defined(CONFIG_CMD_PING) | |
531 | extern struct in_addr net_ping_ip; /* the ip address to ping */ | |
532 | #endif | |
533 | ||
534 | #if defined(CONFIG_CMD_CDP) | |
535 | /* when CDP completes these hold the return values */ | |
536 | extern ushort cdp_native_vlan; /* CDP returned native VLAN */ | |
537 | extern ushort cdp_appliance_vlan; /* CDP returned appliance VLAN */ | |
538 | ||
539 | /* | |
540 | * Check for a CDP packet by examining the received MAC address field | |
541 | */ | |
542 | static inline int is_cdp_packet(const uchar *ethaddr) | |
543 | { | |
544 | extern const u8 net_cdp_ethaddr[6]; | |
545 | ||
546 | return memcmp(ethaddr, net_cdp_ethaddr, 6) == 0; | |
547 | } | |
548 | #endif | |
549 | ||
550 | #if defined(CONFIG_CMD_SNTP) | |
551 | extern struct in_addr net_ntp_server; /* the ip address to NTP */ | |
552 | extern int net_ntp_time_offset; /* offset time from UTC */ | |
553 | #endif | |
554 | ||
555 | #if defined(CONFIG_MCAST_TFTP) | |
556 | extern struct in_addr net_mcast_addr; | |
557 | #endif | |
558 | ||
559 | /* Initialize the network adapter */ | |
560 | void net_init(void); | |
561 | int net_loop(enum proto_t); | |
562 | ||
563 | /* Load failed. Start again. */ | |
564 | int net_start_again(void); | |
565 | ||
566 | /* Get size of the ethernet header when we send */ | |
567 | int net_eth_hdr_size(void); | |
568 | ||
569 | /* Set ethernet header; returns the size of the header */ | |
570 | int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot); | |
571 | int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot); | |
572 | ||
573 | /* Set IP header */ | |
574 | void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source); | |
575 | void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport, | |
576 | int sport, int len); | |
577 | ||
578 | /** | |
579 | * compute_ip_checksum() - Compute IP checksum | |
580 | * | |
581 | * @addr: Address to check (must be 16-bit aligned) | |
582 | * @nbytes: Number of bytes to check (normally a multiple of 2) | |
583 | * @return 16-bit IP checksum | |
584 | */ | |
585 | unsigned compute_ip_checksum(const void *addr, unsigned nbytes); | |
586 | ||
587 | /** | |
588 | * add_ip_checksums() - add two IP checksums | |
589 | * | |
590 | * @offset: Offset of first sum (if odd we do a byte-swap) | |
591 | * @sum: First checksum | |
592 | * @new_sum: New checksum to add | |
593 | * @return updated 16-bit IP checksum | |
594 | */ | |
595 | unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum); | |
596 | ||
597 | /** | |
598 | * ip_checksum_ok() - check if a checksum is correct | |
599 | * | |
600 | * This works by making sure the checksum sums to 0 | |
601 | * | |
602 | * @addr: Address to check (must be 16-bit aligned) | |
603 | * @nbytes: Number of bytes to check (normally a multiple of 2) | |
604 | * @return true if the checksum matches, false if not | |
605 | */ | |
606 | int ip_checksum_ok(const void *addr, unsigned nbytes); | |
607 | ||
608 | /* Callbacks */ | |
609 | rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */ | |
610 | void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */ | |
611 | rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */ | |
612 | void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */ | |
613 | void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */ | |
614 | void net_set_timeout_handler(ulong, thand_f *);/* Set timeout handler */ | |
615 | ||
616 | /* Network loop state */ | |
617 | enum net_loop_state { | |
618 | NETLOOP_CONTINUE, | |
619 | NETLOOP_RESTART, | |
620 | NETLOOP_SUCCESS, | |
621 | NETLOOP_FAIL | |
622 | }; | |
623 | extern enum net_loop_state net_state; | |
624 | ||
625 | static inline void net_set_state(enum net_loop_state state) | |
626 | { | |
627 | debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state); | |
628 | net_state = state; | |
629 | } | |
630 | ||
631 | /* Transmit a packet */ | |
632 | static inline void net_send_packet(uchar *pkt, int len) | |
633 | { | |
634 | /* Currently no way to return errors from eth_send() */ | |
635 | (void) eth_send(pkt, len); | |
636 | } | |
637 | ||
638 | /* | |
639 | * Transmit "net_tx_packet" as UDP packet, performing ARP request if needed | |
640 | * (ether will be populated) | |
641 | * | |
642 | * @param ether Raw packet buffer | |
643 | * @param dest IP address to send the datagram to | |
644 | * @param dport Destination UDP port | |
645 | * @param sport Source UDP port | |
646 | * @param payload_len Length of data after the UDP header | |
647 | */ | |
648 | int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport, | |
649 | int sport, int payload_len); | |
650 | ||
651 | /* Processes a received packet */ | |
652 | void net_process_received_packet(uchar *in_packet, int len); | |
653 | ||
654 | #ifdef CONFIG_NETCONSOLE | |
655 | void nc_start(void); | |
656 | int nc_input_packet(uchar *pkt, struct in_addr src_ip, unsigned dest_port, | |
657 | unsigned src_port, unsigned len); | |
658 | #endif | |
659 | ||
660 | static inline __attribute__((always_inline)) int eth_is_on_demand_init(void) | |
661 | { | |
662 | #ifdef CONFIG_NETCONSOLE | |
663 | extern enum proto_t net_loop_last_protocol; | |
664 | ||
665 | return net_loop_last_protocol != NETCONS; | |
666 | #else | |
667 | return 1; | |
668 | #endif | |
669 | } | |
670 | ||
671 | static inline void eth_set_last_protocol(int protocol) | |
672 | { | |
673 | #ifdef CONFIG_NETCONSOLE | |
674 | extern enum proto_t net_loop_last_protocol; | |
675 | ||
676 | net_loop_last_protocol = protocol; | |
677 | #endif | |
678 | } | |
679 | ||
680 | /* | |
681 | * Check if autoload is enabled. If so, use either NFS or TFTP to download | |
682 | * the boot file. | |
683 | */ | |
684 | void net_auto_load(void); | |
685 | ||
686 | /* | |
687 | * The following functions are a bit ugly, but necessary to deal with | |
688 | * alignment restrictions on ARM. | |
689 | * | |
690 | * We're using inline functions, which had the smallest memory | |
691 | * footprint in our tests. | |
692 | */ | |
693 | /* return IP *in network byteorder* */ | |
694 | static inline struct in_addr net_read_ip(void *from) | |
695 | { | |
696 | struct in_addr ip; | |
697 | ||
698 | memcpy((void *)&ip, (void *)from, sizeof(ip)); | |
699 | return ip; | |
700 | } | |
701 | ||
702 | /* return ulong *in network byteorder* */ | |
703 | static inline u32 net_read_u32(u32 *from) | |
704 | { | |
705 | u32 l; | |
706 | ||
707 | memcpy((void *)&l, (void *)from, sizeof(l)); | |
708 | return l; | |
709 | } | |
710 | ||
711 | /* write IP *in network byteorder* */ | |
712 | static inline void net_write_ip(void *to, struct in_addr ip) | |
713 | { | |
714 | memcpy(to, (void *)&ip, sizeof(ip)); | |
715 | } | |
716 | ||
717 | /* copy IP */ | |
718 | static inline void net_copy_ip(void *to, void *from) | |
719 | { | |
720 | memcpy((void *)to, from, sizeof(struct in_addr)); | |
721 | } | |
722 | ||
723 | /* copy ulong */ | |
724 | static inline void net_copy_u32(u32 *to, u32 *from) | |
725 | { | |
726 | memcpy((void *)to, (void *)from, sizeof(u32)); | |
727 | } | |
728 | ||
729 | /** | |
730 | * is_zero_ethaddr - Determine if give Ethernet address is all zeros. | |
731 | * @addr: Pointer to a six-byte array containing the Ethernet address | |
732 | * | |
733 | * Return true if the address is all zeroes. | |
734 | */ | |
735 | static inline int is_zero_ethaddr(const u8 *addr) | |
736 | { | |
737 | return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]); | |
738 | } | |
739 | ||
740 | /** | |
741 | * is_multicast_ethaddr - Determine if the Ethernet address is a multicast. | |
742 | * @addr: Pointer to a six-byte array containing the Ethernet address | |
743 | * | |
744 | * Return true if the address is a multicast address. | |
745 | * By definition the broadcast address is also a multicast address. | |
746 | */ | |
747 | static inline int is_multicast_ethaddr(const u8 *addr) | |
748 | { | |
749 | return 0x01 & addr[0]; | |
750 | } | |
751 | ||
752 | /* | |
753 | * is_broadcast_ethaddr - Determine if the Ethernet address is broadcast | |
754 | * @addr: Pointer to a six-byte array containing the Ethernet address | |
755 | * | |
756 | * Return true if the address is the broadcast address. | |
757 | */ | |
758 | static inline int is_broadcast_ethaddr(const u8 *addr) | |
759 | { | |
760 | return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == | |
761 | 0xff; | |
762 | } | |
763 | ||
764 | /* | |
765 | * is_valid_ethaddr - Determine if the given Ethernet address is valid | |
766 | * @addr: Pointer to a six-byte array containing the Ethernet address | |
767 | * | |
768 | * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not | |
769 | * a multicast address, and is not FF:FF:FF:FF:FF:FF. | |
770 | * | |
771 | * Return true if the address is valid. | |
772 | */ | |
773 | static inline int is_valid_ethaddr(const u8 *addr) | |
774 | { | |
775 | /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to | |
776 | * explicitly check for it here. */ | |
777 | return !is_multicast_ethaddr(addr) && !is_zero_ethaddr(addr); | |
778 | } | |
779 | ||
780 | /** | |
781 | * net_random_ethaddr - Generate software assigned random Ethernet address | |
782 | * @addr: Pointer to a six-byte array containing the Ethernet address | |
783 | * | |
784 | * Generate a random Ethernet address (MAC) that is not multicast | |
785 | * and has the local assigned bit set. | |
786 | */ | |
787 | static inline void net_random_ethaddr(uchar *addr) | |
788 | { | |
789 | int i; | |
790 | unsigned int seed = get_timer(0); | |
791 | ||
792 | for (i = 0; i < 6; i++) | |
793 | addr[i] = rand_r(&seed); | |
794 | ||
795 | addr[0] &= 0xfe; /* clear multicast bit */ | |
796 | addr[0] |= 0x02; /* set local assignment bit (IEEE802) */ | |
797 | } | |
798 | ||
799 | /* Convert an IP address to a string */ | |
800 | void ip_to_string(struct in_addr x, char *s); | |
801 | ||
802 | /* Convert a string to ip address */ | |
803 | struct in_addr string_to_ip(const char *s); | |
804 | ||
805 | /* Convert a VLAN id to a string */ | |
806 | void vlan_to_string(ushort x, char *s); | |
807 | ||
808 | /* Convert a string to a vlan id */ | |
809 | ushort string_to_vlan(const char *s); | |
810 | ||
811 | /* read a VLAN id from an environment variable */ | |
812 | ushort getenv_vlan(char *); | |
813 | ||
814 | /* copy a filename (allow for "..." notation, limit length) */ | |
815 | void copy_filename(char *dst, const char *src, int size); | |
816 | ||
817 | /* get a random source port */ | |
818 | unsigned int random_port(void); | |
819 | ||
820 | /** | |
821 | * update_tftp - Update firmware over TFTP (via DFU) | |
822 | * | |
823 | * This function updates board's firmware via TFTP | |
824 | * | |
825 | * @param addr - memory address where data is stored | |
826 | * @param interface - the DFU medium name - e.g. "mmc" | |
827 | * @param devstring - the DFU medium number - e.g. "1" | |
828 | * | |
829 | * @return - 0 on success, other value on failure | |
830 | */ | |
831 | int update_tftp(ulong addr, char *interface, char *devstring); | |
832 | ||
833 | /**********************************************************************/ | |
834 | ||
835 | #endif /* __NET_H__ */ |