Merge tag 'ti-v2020.07-rc3' of https://gitlab.denx.de/u-boot/custodians/u-boot-ti
[platform/kernel/u-boot.git] / net / net.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  *      Copied from Linux Monitor (LiMon) - Networking.
4  *
5  *      Copyright 1994 - 2000 Neil Russell.
6  *      (See License)
7  *      Copyright 2000 Roland Borde
8  *      Copyright 2000 Paolo Scaffardi
9  *      Copyright 2000-2002 Wolfgang Denk, wd@denx.de
10  */
11
12 /*
13  * General Desription:
14  *
15  * The user interface supports commands for BOOTP, RARP, and TFTP.
16  * Also, we support ARP internally. Depending on available data,
17  * these interact as follows:
18  *
19  * BOOTP:
20  *
21  *      Prerequisites:  - own ethernet address
22  *      We want:        - own IP address
23  *                      - TFTP server IP address
24  *                      - name of bootfile
25  *      Next step:      ARP
26  *
27  * LINK_LOCAL:
28  *
29  *      Prerequisites:  - own ethernet address
30  *      We want:        - own IP address
31  *      Next step:      ARP
32  *
33  * RARP:
34  *
35  *      Prerequisites:  - own ethernet address
36  *      We want:        - own IP address
37  *                      - TFTP server IP address
38  *      Next step:      ARP
39  *
40  * ARP:
41  *
42  *      Prerequisites:  - own ethernet address
43  *                      - own IP address
44  *                      - TFTP server IP address
45  *      We want:        - TFTP server ethernet address
46  *      Next step:      TFTP
47  *
48  * DHCP:
49  *
50  *     Prerequisites:   - own ethernet address
51  *     We want:         - IP, Netmask, ServerIP, Gateway IP
52  *                      - bootfilename, lease time
53  *     Next step:       - TFTP
54  *
55  * TFTP:
56  *
57  *      Prerequisites:  - own ethernet address
58  *                      - own IP address
59  *                      - TFTP server IP address
60  *                      - TFTP server ethernet address
61  *                      - name of bootfile (if unknown, we use a default name
62  *                        derived from our own IP address)
63  *      We want:        - load the boot file
64  *      Next step:      none
65  *
66  * NFS:
67  *
68  *      Prerequisites:  - own ethernet address
69  *                      - own IP address
70  *                      - name of bootfile (if unknown, we use a default name
71  *                        derived from our own IP address)
72  *      We want:        - load the boot file
73  *      Next step:      none
74  *
75  * SNTP:
76  *
77  *      Prerequisites:  - own ethernet address
78  *                      - own IP address
79  *      We want:        - network time
80  *      Next step:      none
81  *
82  * WOL:
83  *
84  *      Prerequisites:  - own ethernet address
85  *      We want:        - magic packet or timeout
86  *      Next step:      none
87  */
88
89
90 #include <common.h>
91 #include <bootstage.h>
92 #include <command.h>
93 #include <console.h>
94 #include <env.h>
95 #include <env_internal.h>
96 #include <errno.h>
97 #include <image.h>
98 #include <log.h>
99 #include <net.h>
100 #include <net/fastboot.h>
101 #include <net/tftp.h>
102 #if defined(CONFIG_CMD_PCAP)
103 #include <net/pcap.h>
104 #endif
105 #if defined(CONFIG_LED_STATUS)
106 #include <miiphy.h>
107 #include <status_led.h>
108 #endif
109 #include <watchdog.h>
110 #include <linux/compiler.h>
111 #include "arp.h"
112 #include "bootp.h"
113 #include "cdp.h"
114 #if defined(CONFIG_CMD_DNS)
115 #include "dns.h"
116 #endif
117 #include "link_local.h"
118 #include "nfs.h"
119 #include "ping.h"
120 #include "rarp.h"
121 #if defined(CONFIG_CMD_SNTP)
122 #include "sntp.h"
123 #endif
124 #if defined(CONFIG_CMD_WOL)
125 #include "wol.h"
126 #endif
127
128 /** BOOTP EXTENTIONS **/
129
130 /* Our subnet mask (0=unknown) */
131 struct in_addr net_netmask;
132 /* Our gateways IP address */
133 struct in_addr net_gateway;
134 /* Our DNS IP address */
135 struct in_addr net_dns_server;
136 #if defined(CONFIG_BOOTP_DNS2)
137 /* Our 2nd DNS IP address */
138 struct in_addr net_dns_server2;
139 #endif
140
141 /** END OF BOOTP EXTENTIONS **/
142
143 /* Our ethernet address */
144 u8 net_ethaddr[6];
145 /* Boot server enet address */
146 u8 net_server_ethaddr[6];
147 /* Our IP addr (0 = unknown) */
148 struct in_addr  net_ip;
149 /* Server IP addr (0 = unknown) */
150 struct in_addr  net_server_ip;
151 /* Current receive packet */
152 uchar *net_rx_packet;
153 /* Current rx packet length */
154 int             net_rx_packet_len;
155 /* IP packet ID */
156 static unsigned net_ip_id;
157 /* Ethernet bcast address */
158 const u8 net_bcast_ethaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
159 const u8 net_null_ethaddr[6];
160 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
161 void (*push_packet)(void *, int len) = 0;
162 #endif
163 /* Network loop state */
164 enum net_loop_state net_state;
165 /* Tried all network devices */
166 int             net_restart_wrap;
167 /* Network loop restarted */
168 static int      net_restarted;
169 /* At least one device configured */
170 static int      net_dev_exists;
171
172 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
173 /* default is without VLAN */
174 ushort          net_our_vlan = 0xFFFF;
175 /* ditto */
176 ushort          net_native_vlan = 0xFFFF;
177
178 /* Boot File name */
179 char net_boot_file_name[1024];
180 /* Indicates whether the file name was specified on the command line */
181 bool net_boot_file_name_explicit;
182 /* The actual transferred size of the bootfile (in bytes) */
183 u32 net_boot_file_size;
184 /* Boot file size in blocks as reported by the DHCP server */
185 u32 net_boot_file_expected_size_in_blocks;
186
187 #if defined(CONFIG_CMD_SNTP)
188 /* NTP server IP address */
189 struct in_addr  net_ntp_server;
190 /* offset time from UTC */
191 int             net_ntp_time_offset;
192 #endif
193
194 static uchar net_pkt_buf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
195 /* Receive packets */
196 uchar *net_rx_packets[PKTBUFSRX];
197 /* Current UDP RX packet handler */
198 static rxhand_f *udp_packet_handler;
199 /* Current ARP RX packet handler */
200 static rxhand_f *arp_packet_handler;
201 #ifdef CONFIG_CMD_TFTPPUT
202 /* Current ICMP rx handler */
203 static rxhand_icmp_f *packet_icmp_handler;
204 #endif
205 /* Current timeout handler */
206 static thand_f *time_handler;
207 /* Time base value */
208 static ulong    time_start;
209 /* Current timeout value */
210 static ulong    time_delta;
211 /* THE transmit packet */
212 uchar *net_tx_packet;
213
214 static int net_check_prereq(enum proto_t protocol);
215
216 static int net_try_count;
217
218 int __maybe_unused net_busy_flag;
219
220 /**********************************************************************/
221
222 static int on_ipaddr(const char *name, const char *value, enum env_op op,
223         int flags)
224 {
225         if (flags & H_PROGRAMMATIC)
226                 return 0;
227
228         net_ip = string_to_ip(value);
229
230         return 0;
231 }
232 U_BOOT_ENV_CALLBACK(ipaddr, on_ipaddr);
233
234 static int on_gatewayip(const char *name, const char *value, enum env_op op,
235         int flags)
236 {
237         if (flags & H_PROGRAMMATIC)
238                 return 0;
239
240         net_gateway = string_to_ip(value);
241
242         return 0;
243 }
244 U_BOOT_ENV_CALLBACK(gatewayip, on_gatewayip);
245
246 static int on_netmask(const char *name, const char *value, enum env_op op,
247         int flags)
248 {
249         if (flags & H_PROGRAMMATIC)
250                 return 0;
251
252         net_netmask = string_to_ip(value);
253
254         return 0;
255 }
256 U_BOOT_ENV_CALLBACK(netmask, on_netmask);
257
258 static int on_serverip(const char *name, const char *value, enum env_op op,
259         int flags)
260 {
261         if (flags & H_PROGRAMMATIC)
262                 return 0;
263
264         net_server_ip = string_to_ip(value);
265
266         return 0;
267 }
268 U_BOOT_ENV_CALLBACK(serverip, on_serverip);
269
270 static int on_nvlan(const char *name, const char *value, enum env_op op,
271         int flags)
272 {
273         if (flags & H_PROGRAMMATIC)
274                 return 0;
275
276         net_native_vlan = string_to_vlan(value);
277
278         return 0;
279 }
280 U_BOOT_ENV_CALLBACK(nvlan, on_nvlan);
281
282 static int on_vlan(const char *name, const char *value, enum env_op op,
283         int flags)
284 {
285         if (flags & H_PROGRAMMATIC)
286                 return 0;
287
288         net_our_vlan = string_to_vlan(value);
289
290         return 0;
291 }
292 U_BOOT_ENV_CALLBACK(vlan, on_vlan);
293
294 #if defined(CONFIG_CMD_DNS)
295 static int on_dnsip(const char *name, const char *value, enum env_op op,
296         int flags)
297 {
298         if (flags & H_PROGRAMMATIC)
299                 return 0;
300
301         net_dns_server = string_to_ip(value);
302
303         return 0;
304 }
305 U_BOOT_ENV_CALLBACK(dnsip, on_dnsip);
306 #endif
307
308 /*
309  * Check if autoload is enabled. If so, use either NFS or TFTP to download
310  * the boot file.
311  */
312 void net_auto_load(void)
313 {
314 #if defined(CONFIG_CMD_NFS) && !defined(CONFIG_SPL_BUILD)
315         const char *s = env_get("autoload");
316
317         if (s != NULL && strcmp(s, "NFS") == 0) {
318                 if (net_check_prereq(NFS)) {
319 /* We aren't expecting to get a serverip, so just accept the assigned IP */
320 #ifdef CONFIG_BOOTP_SERVERIP
321                         net_set_state(NETLOOP_SUCCESS);
322 #else
323                         printf("Cannot autoload with NFS\n");
324                         net_set_state(NETLOOP_FAIL);
325 #endif
326                         return;
327                 }
328                 /*
329                  * Use NFS to load the bootfile.
330                  */
331                 nfs_start();
332                 return;
333         }
334 #endif
335         if (env_get_yesno("autoload") == 0) {
336                 /*
337                  * Just use BOOTP/RARP to configure system;
338                  * Do not use TFTP to load the bootfile.
339                  */
340                 net_set_state(NETLOOP_SUCCESS);
341                 return;
342         }
343         if (net_check_prereq(TFTPGET)) {
344 /* We aren't expecting to get a serverip, so just accept the assigned IP */
345 #ifdef CONFIG_BOOTP_SERVERIP
346                 net_set_state(NETLOOP_SUCCESS);
347 #else
348                 printf("Cannot autoload with TFTPGET\n");
349                 net_set_state(NETLOOP_FAIL);
350 #endif
351                 return;
352         }
353         tftp_start(TFTPGET);
354 }
355
356 static void net_init_loop(void)
357 {
358         if (eth_get_dev())
359                 memcpy(net_ethaddr, eth_get_ethaddr(), 6);
360
361         return;
362 }
363
364 static void net_clear_handlers(void)
365 {
366         net_set_udp_handler(NULL);
367         net_set_arp_handler(NULL);
368         net_set_timeout_handler(0, NULL);
369 }
370
371 static void net_cleanup_loop(void)
372 {
373         net_clear_handlers();
374 }
375
376 void net_init(void)
377 {
378         static int first_call = 1;
379
380         if (first_call) {
381                 /*
382                  *      Setup packet buffers, aligned correctly.
383                  */
384                 int i;
385
386                 net_tx_packet = &net_pkt_buf[0] + (PKTALIGN - 1);
387                 net_tx_packet -= (ulong)net_tx_packet % PKTALIGN;
388                 for (i = 0; i < PKTBUFSRX; i++) {
389                         net_rx_packets[i] = net_tx_packet +
390                                 (i + 1) * PKTSIZE_ALIGN;
391                 }
392                 arp_init();
393                 net_clear_handlers();
394
395                 /* Only need to setup buffer pointers once. */
396                 first_call = 0;
397         }
398
399         net_init_loop();
400 }
401
402 /**********************************************************************/
403 /*
404  *      Main network processing loop.
405  */
406
407 int net_loop(enum proto_t protocol)
408 {
409         int ret = -EINVAL;
410         enum net_loop_state prev_net_state = net_state;
411
412         net_restarted = 0;
413         net_dev_exists = 0;
414         net_try_count = 1;
415         debug_cond(DEBUG_INT_STATE, "--- net_loop Entry\n");
416
417         bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
418         net_init();
419         if (eth_is_on_demand_init() || protocol != NETCONS) {
420                 eth_halt();
421                 eth_set_current();
422                 ret = eth_init();
423                 if (ret < 0) {
424                         eth_halt();
425                         return ret;
426                 }
427         } else {
428                 eth_init_state_only();
429         }
430 restart:
431 #ifdef CONFIG_USB_KEYBOARD
432         net_busy_flag = 0;
433 #endif
434         net_set_state(NETLOOP_CONTINUE);
435
436         /*
437          *      Start the ball rolling with the given start function.  From
438          *      here on, this code is a state machine driven by received
439          *      packets and timer events.
440          */
441         debug_cond(DEBUG_INT_STATE, "--- net_loop Init\n");
442         net_init_loop();
443
444         switch (net_check_prereq(protocol)) {
445         case 1:
446                 /* network not configured */
447                 eth_halt();
448                 net_set_state(prev_net_state);
449                 return -ENODEV;
450
451         case 2:
452                 /* network device not configured */
453                 break;
454
455         case 0:
456                 net_dev_exists = 1;
457                 net_boot_file_size = 0;
458                 switch (protocol) {
459                 case TFTPGET:
460 #ifdef CONFIG_CMD_TFTPPUT
461                 case TFTPPUT:
462 #endif
463                         /* always use ARP to get server ethernet address */
464                         tftp_start(protocol);
465                         break;
466 #ifdef CONFIG_CMD_TFTPSRV
467                 case TFTPSRV:
468                         tftp_start_server();
469                         break;
470 #endif
471 #ifdef CONFIG_UDP_FUNCTION_FASTBOOT
472                 case FASTBOOT:
473                         fastboot_start_server();
474                         break;
475 #endif
476 #if defined(CONFIG_CMD_DHCP)
477                 case DHCP:
478                         bootp_reset();
479                         net_ip.s_addr = 0;
480                         dhcp_request();         /* Basically same as BOOTP */
481                         break;
482 #endif
483
484                 case BOOTP:
485                         bootp_reset();
486                         net_ip.s_addr = 0;
487                         bootp_request();
488                         break;
489
490 #if defined(CONFIG_CMD_RARP)
491                 case RARP:
492                         rarp_try = 0;
493                         net_ip.s_addr = 0;
494                         rarp_request();
495                         break;
496 #endif
497 #if defined(CONFIG_CMD_PING)
498                 case PING:
499                         ping_start();
500                         break;
501 #endif
502 #if defined(CONFIG_CMD_NFS) && !defined(CONFIG_SPL_BUILD)
503                 case NFS:
504                         nfs_start();
505                         break;
506 #endif
507 #if defined(CONFIG_CMD_CDP)
508                 case CDP:
509                         cdp_start();
510                         break;
511 #endif
512 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
513                 case NETCONS:
514                         nc_start();
515                         break;
516 #endif
517 #if defined(CONFIG_CMD_SNTP)
518                 case SNTP:
519                         sntp_start();
520                         break;
521 #endif
522 #if defined(CONFIG_CMD_DNS)
523                 case DNS:
524                         dns_start();
525                         break;
526 #endif
527 #if defined(CONFIG_CMD_LINK_LOCAL)
528                 case LINKLOCAL:
529                         link_local_start();
530                         break;
531 #endif
532 #if defined(CONFIG_CMD_WOL)
533                 case WOL:
534                         wol_start();
535                         break;
536 #endif
537                 default:
538                         break;
539                 }
540
541                 break;
542         }
543
544 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
545 #if     defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN)        && \
546         defined(CONFIG_LED_STATUS)                      && \
547         defined(CONFIG_LED_STATUS_RED)
548         /*
549          * Echo the inverted link state to the fault LED.
550          */
551         if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
552                 status_led_set(CONFIG_LED_STATUS_RED, CONFIG_LED_STATUS_OFF);
553         else
554                 status_led_set(CONFIG_LED_STATUS_RED, CONFIG_LED_STATUS_ON);
555 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
556 #endif /* CONFIG_MII, ... */
557 #ifdef CONFIG_USB_KEYBOARD
558         net_busy_flag = 1;
559 #endif
560
561         /*
562          *      Main packet reception loop.  Loop receiving packets until
563          *      someone sets `net_state' to a state that terminates.
564          */
565         for (;;) {
566                 WATCHDOG_RESET();
567                 if (arp_timeout_check() > 0)
568                         time_start = get_timer(0);
569
570                 /*
571                  *      Check the ethernet for a new packet.  The ethernet
572                  *      receive routine will process it.
573                  *      Most drivers return the most recent packet size, but not
574                  *      errors that may have happened.
575                  */
576                 eth_rx();
577
578                 /*
579                  *      Abort if ctrl-c was pressed.
580                  */
581                 if (ctrlc()) {
582                         /* cancel any ARP that may not have completed */
583                         net_arp_wait_packet_ip.s_addr = 0;
584
585                         net_cleanup_loop();
586                         eth_halt();
587                         /* Invalidate the last protocol */
588                         eth_set_last_protocol(BOOTP);
589
590                         puts("\nAbort\n");
591                         /* include a debug print as well incase the debug
592                            messages are directed to stderr */
593                         debug_cond(DEBUG_INT_STATE, "--- net_loop Abort!\n");
594                         ret = -EINTR;
595                         goto done;
596                 }
597
598                 /*
599                  *      Check for a timeout, and run the timeout handler
600                  *      if we have one.
601                  */
602                 if (time_handler &&
603                     ((get_timer(0) - time_start) > time_delta)) {
604                         thand_f *x;
605
606 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
607 #if     defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN)        && \
608         defined(CONFIG_LED_STATUS)                      && \
609         defined(CONFIG_LED_STATUS_RED)
610                         /*
611                          * Echo the inverted link state to the fault LED.
612                          */
613                         if (miiphy_link(eth_get_dev()->name,
614                                         CONFIG_SYS_FAULT_MII_ADDR))
615                                 status_led_set(CONFIG_LED_STATUS_RED,
616                                                CONFIG_LED_STATUS_OFF);
617                         else
618                                 status_led_set(CONFIG_LED_STATUS_RED,
619                                                CONFIG_LED_STATUS_ON);
620 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
621 #endif /* CONFIG_MII, ... */
622                         debug_cond(DEBUG_INT_STATE, "--- net_loop timeout\n");
623                         x = time_handler;
624                         time_handler = (thand_f *)0;
625                         (*x)();
626                 }
627
628                 if (net_state == NETLOOP_FAIL)
629                         ret = net_start_again();
630
631                 switch (net_state) {
632                 case NETLOOP_RESTART:
633                         net_restarted = 1;
634                         goto restart;
635
636                 case NETLOOP_SUCCESS:
637                         net_cleanup_loop();
638                         if (net_boot_file_size > 0) {
639                                 printf("Bytes transferred = %d (%x hex)\n",
640                                        net_boot_file_size, net_boot_file_size);
641                                 env_set_hex("filesize", net_boot_file_size);
642                                 env_set_hex("fileaddr", image_load_addr);
643                         }
644                         if (protocol != NETCONS)
645                                 eth_halt();
646                         else
647                                 eth_halt_state_only();
648
649                         eth_set_last_protocol(protocol);
650
651                         ret = net_boot_file_size;
652                         debug_cond(DEBUG_INT_STATE, "--- net_loop Success!\n");
653                         goto done;
654
655                 case NETLOOP_FAIL:
656                         net_cleanup_loop();
657                         /* Invalidate the last protocol */
658                         eth_set_last_protocol(BOOTP);
659                         debug_cond(DEBUG_INT_STATE, "--- net_loop Fail!\n");
660                         ret = -ENONET;
661                         goto done;
662
663                 case NETLOOP_CONTINUE:
664                         continue;
665                 }
666         }
667
668 done:
669 #ifdef CONFIG_USB_KEYBOARD
670         net_busy_flag = 0;
671 #endif
672 #ifdef CONFIG_CMD_TFTPPUT
673         /* Clear out the handlers */
674         net_set_udp_handler(NULL);
675         net_set_icmp_handler(NULL);
676 #endif
677         net_set_state(prev_net_state);
678
679 #if defined(CONFIG_CMD_PCAP)
680         if (pcap_active())
681                 pcap_print_status();
682 #endif
683         return ret;
684 }
685
686 /**********************************************************************/
687
688 static void start_again_timeout_handler(void)
689 {
690         net_set_state(NETLOOP_RESTART);
691 }
692
693 int net_start_again(void)
694 {
695         char *nretry;
696         int retry_forever = 0;
697         unsigned long retrycnt = 0;
698         int ret;
699
700         nretry = env_get("netretry");
701         if (nretry) {
702                 if (!strcmp(nretry, "yes"))
703                         retry_forever = 1;
704                 else if (!strcmp(nretry, "no"))
705                         retrycnt = 0;
706                 else if (!strcmp(nretry, "once"))
707                         retrycnt = 1;
708                 else
709                         retrycnt = simple_strtoul(nretry, NULL, 0);
710         } else {
711                 retrycnt = 0;
712                 retry_forever = 0;
713         }
714
715         if ((!retry_forever) && (net_try_count > retrycnt)) {
716                 eth_halt();
717                 net_set_state(NETLOOP_FAIL);
718                 /*
719                  * We don't provide a way for the protocol to return an error,
720                  * but this is almost always the reason.
721                  */
722                 return -ETIMEDOUT;
723         }
724
725         net_try_count++;
726
727         eth_halt();
728 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
729         eth_try_another(!net_restarted);
730 #endif
731         ret = eth_init();
732         if (net_restart_wrap) {
733                 net_restart_wrap = 0;
734                 if (net_dev_exists) {
735                         net_set_timeout_handler(10000UL,
736                                                 start_again_timeout_handler);
737                         net_set_udp_handler(NULL);
738                 } else {
739                         net_set_state(NETLOOP_FAIL);
740                 }
741         } else {
742                 net_set_state(NETLOOP_RESTART);
743         }
744         return ret;
745 }
746
747 /**********************************************************************/
748 /*
749  *      Miscelaneous bits.
750  */
751
752 static void dummy_handler(uchar *pkt, unsigned dport,
753                         struct in_addr sip, unsigned sport,
754                         unsigned len)
755 {
756 }
757
758 rxhand_f *net_get_udp_handler(void)
759 {
760         return udp_packet_handler;
761 }
762
763 void net_set_udp_handler(rxhand_f *f)
764 {
765         debug_cond(DEBUG_INT_STATE, "--- net_loop UDP handler set (%p)\n", f);
766         if (f == NULL)
767                 udp_packet_handler = dummy_handler;
768         else
769                 udp_packet_handler = f;
770 }
771
772 rxhand_f *net_get_arp_handler(void)
773 {
774         return arp_packet_handler;
775 }
776
777 void net_set_arp_handler(rxhand_f *f)
778 {
779         debug_cond(DEBUG_INT_STATE, "--- net_loop ARP handler set (%p)\n", f);
780         if (f == NULL)
781                 arp_packet_handler = dummy_handler;
782         else
783                 arp_packet_handler = f;
784 }
785
786 #ifdef CONFIG_CMD_TFTPPUT
787 void net_set_icmp_handler(rxhand_icmp_f *f)
788 {
789         packet_icmp_handler = f;
790 }
791 #endif
792
793 void net_set_timeout_handler(ulong iv, thand_f *f)
794 {
795         if (iv == 0) {
796                 debug_cond(DEBUG_INT_STATE,
797                            "--- net_loop timeout handler cancelled\n");
798                 time_handler = (thand_f *)0;
799         } else {
800                 debug_cond(DEBUG_INT_STATE,
801                            "--- net_loop timeout handler set (%p)\n", f);
802                 time_handler = f;
803                 time_start = get_timer(0);
804                 time_delta = iv * CONFIG_SYS_HZ / 1000;
805         }
806 }
807
808 uchar *net_get_async_tx_pkt_buf(void)
809 {
810         if (arp_is_waiting())
811                 return arp_tx_packet; /* If we are waiting, we already sent */
812         else
813                 return net_tx_packet;
814 }
815
816 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport, int sport,
817                 int payload_len)
818 {
819         return net_send_ip_packet(ether, dest, dport, sport, payload_len,
820                                   IPPROTO_UDP, 0, 0, 0);
821 }
822
823 int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport,
824                        int payload_len, int proto, u8 action, u32 tcp_seq_num,
825                        u32 tcp_ack_num)
826 {
827         uchar *pkt;
828         int eth_hdr_size;
829         int pkt_hdr_size;
830
831         /* make sure the net_tx_packet is initialized (net_init() was called) */
832         assert(net_tx_packet != NULL);
833         if (net_tx_packet == NULL)
834                 return -1;
835
836         /* convert to new style broadcast */
837         if (dest.s_addr == 0)
838                 dest.s_addr = 0xFFFFFFFF;
839
840         /* if broadcast, make the ether address a broadcast and don't do ARP */
841         if (dest.s_addr == 0xFFFFFFFF)
842                 ether = (uchar *)net_bcast_ethaddr;
843
844         pkt = (uchar *)net_tx_packet;
845
846         eth_hdr_size = net_set_ether(pkt, ether, PROT_IP);
847
848         switch (proto) {
849         case IPPROTO_UDP:
850                 net_set_udp_header(pkt + eth_hdr_size, dest, dport, sport,
851                                    payload_len);
852                 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
853                 break;
854         default:
855                 return -EINVAL;
856         }
857
858         /* if MAC address was not discovered yet, do an ARP request */
859         if (memcmp(ether, net_null_ethaddr, 6) == 0) {
860                 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
861
862                 /* save the ip and eth addr for the packet to send after arp */
863                 net_arp_wait_packet_ip = dest;
864                 arp_wait_packet_ethaddr = ether;
865
866                 /* size of the waiting packet */
867                 arp_wait_tx_packet_size = pkt_hdr_size + payload_len;
868
869                 /* and do the ARP request */
870                 arp_wait_try = 1;
871                 arp_wait_timer_start = get_timer(0);
872                 arp_request();
873                 return 1;       /* waiting */
874         } else {
875                 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
876                            &dest, ether);
877                 net_send_packet(net_tx_packet, pkt_hdr_size + payload_len);
878                 return 0;       /* transmitted */
879         }
880 }
881
882 #ifdef CONFIG_IP_DEFRAG
883 /*
884  * This function collects fragments in a single packet, according
885  * to the algorithm in RFC815. It returns NULL or the pointer to
886  * a complete packet, in static storage
887  */
888 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG)
889
890 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
891
892 /*
893  * this is the packet being assembled, either data or frag control.
894  * Fragments go by 8 bytes, so this union must be 8 bytes long
895  */
896 struct hole {
897         /* first_byte is address of this structure */
898         u16 last_byte;  /* last byte in this hole + 1 (begin of next hole) */
899         u16 next_hole;  /* index of next (in 8-b blocks), 0 == none */
900         u16 prev_hole;  /* index of prev, 0 == none */
901         u16 unused;
902 };
903
904 static struct ip_udp_hdr *__net_defragment(struct ip_udp_hdr *ip, int *lenp)
905 {
906         static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
907         static u16 first_hole, total_len;
908         struct hole *payload, *thisfrag, *h, *newh;
909         struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
910         uchar *indata = (uchar *)ip;
911         int offset8, start, len, done = 0;
912         u16 ip_off = ntohs(ip->ip_off);
913
914         /* payload starts after IP header, this fragment is in there */
915         payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
916         offset8 =  (ip_off & IP_OFFS);
917         thisfrag = payload + offset8;
918         start = offset8 * 8;
919         len = ntohs(ip->ip_len) - IP_HDR_SIZE;
920
921         if (start + len > IP_MAXUDP) /* fragment extends too far */
922                 return NULL;
923
924         if (!total_len || localip->ip_id != ip->ip_id) {
925                 /* new (or different) packet, reset structs */
926                 total_len = 0xffff;
927                 payload[0].last_byte = ~0;
928                 payload[0].next_hole = 0;
929                 payload[0].prev_hole = 0;
930                 first_hole = 0;
931                 /* any IP header will work, copy the first we received */
932                 memcpy(localip, ip, IP_HDR_SIZE);
933         }
934
935         /*
936          * What follows is the reassembly algorithm. We use the payload
937          * array as a linked list of hole descriptors, as each hole starts
938          * at a multiple of 8 bytes. However, last byte can be whatever value,
939          * so it is represented as byte count, not as 8-byte blocks.
940          */
941
942         h = payload + first_hole;
943         while (h->last_byte < start) {
944                 if (!h->next_hole) {
945                         /* no hole that far away */
946                         return NULL;
947                 }
948                 h = payload + h->next_hole;
949         }
950
951         /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
952         if (offset8 + ((len + 7) / 8) <= h - payload) {
953                 /* no overlap with holes (dup fragment?) */
954                 return NULL;
955         }
956
957         if (!(ip_off & IP_FLAGS_MFRAG)) {
958                 /* no more fragmentss: truncate this (last) hole */
959                 total_len = start + len;
960                 h->last_byte = start + len;
961         }
962
963         /*
964          * There is some overlap: fix the hole list. This code doesn't
965          * deal with a fragment that overlaps with two different holes
966          * (thus being a superset of a previously-received fragment).
967          */
968
969         if ((h >= thisfrag) && (h->last_byte <= start + len)) {
970                 /* complete overlap with hole: remove hole */
971                 if (!h->prev_hole && !h->next_hole) {
972                         /* last remaining hole */
973                         done = 1;
974                 } else if (!h->prev_hole) {
975                         /* first hole */
976                         first_hole = h->next_hole;
977                         payload[h->next_hole].prev_hole = 0;
978                 } else if (!h->next_hole) {
979                         /* last hole */
980                         payload[h->prev_hole].next_hole = 0;
981                 } else {
982                         /* in the middle of the list */
983                         payload[h->next_hole].prev_hole = h->prev_hole;
984                         payload[h->prev_hole].next_hole = h->next_hole;
985                 }
986
987         } else if (h->last_byte <= start + len) {
988                 /* overlaps with final part of the hole: shorten this hole */
989                 h->last_byte = start;
990
991         } else if (h >= thisfrag) {
992                 /* overlaps with initial part of the hole: move this hole */
993                 newh = thisfrag + (len / 8);
994                 *newh = *h;
995                 h = newh;
996                 if (h->next_hole)
997                         payload[h->next_hole].prev_hole = (h - payload);
998                 if (h->prev_hole)
999                         payload[h->prev_hole].next_hole = (h - payload);
1000                 else
1001                         first_hole = (h - payload);
1002
1003         } else {
1004                 /* fragment sits in the middle: split the hole */
1005                 newh = thisfrag + (len / 8);
1006                 *newh = *h;
1007                 h->last_byte = start;
1008                 h->next_hole = (newh - payload);
1009                 newh->prev_hole = (h - payload);
1010                 if (newh->next_hole)
1011                         payload[newh->next_hole].prev_hole = (newh - payload);
1012         }
1013
1014         /* finally copy this fragment and possibly return whole packet */
1015         memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
1016         if (!done)
1017                 return NULL;
1018
1019         localip->ip_len = htons(total_len);
1020         *lenp = total_len + IP_HDR_SIZE;
1021         return localip;
1022 }
1023
1024 static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip,
1025         int *lenp)
1026 {
1027         u16 ip_off = ntohs(ip->ip_off);
1028         if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1029                 return ip; /* not a fragment */
1030         return __net_defragment(ip, lenp);
1031 }
1032
1033 #else /* !CONFIG_IP_DEFRAG */
1034
1035 static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip,
1036         int *lenp)
1037 {
1038         u16 ip_off = ntohs(ip->ip_off);
1039         if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1040                 return ip; /* not a fragment */
1041         return NULL;
1042 }
1043 #endif
1044
1045 /**
1046  * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
1047  * drop others.
1048  *
1049  * @parma ip    IP packet containing the ICMP
1050  */
1051 static void receive_icmp(struct ip_udp_hdr *ip, int len,
1052                         struct in_addr src_ip, struct ethernet_hdr *et)
1053 {
1054         struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
1055
1056         switch (icmph->type) {
1057         case ICMP_REDIRECT:
1058                 if (icmph->code != ICMP_REDIR_HOST)
1059                         return;
1060                 printf(" ICMP Host Redirect to %pI4 ",
1061                        &icmph->un.gateway);
1062                 break;
1063         default:
1064 #if defined(CONFIG_CMD_PING)
1065                 ping_receive(et, ip, len);
1066 #endif
1067 #ifdef CONFIG_CMD_TFTPPUT
1068                 if (packet_icmp_handler)
1069                         packet_icmp_handler(icmph->type, icmph->code,
1070                                             ntohs(ip->udp_dst), src_ip,
1071                                             ntohs(ip->udp_src), icmph->un.data,
1072                                             ntohs(ip->udp_len));
1073 #endif
1074                 break;
1075         }
1076 }
1077
1078 void net_process_received_packet(uchar *in_packet, int len)
1079 {
1080         struct ethernet_hdr *et;
1081         struct ip_udp_hdr *ip;
1082         struct in_addr dst_ip;
1083         struct in_addr src_ip;
1084         int eth_proto;
1085 #if defined(CONFIG_CMD_CDP)
1086         int iscdp;
1087 #endif
1088         ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1089
1090         debug_cond(DEBUG_NET_PKT, "packet received\n");
1091
1092 #if defined(CONFIG_CMD_PCAP)
1093         pcap_post(in_packet, len, false);
1094 #endif
1095         net_rx_packet = in_packet;
1096         net_rx_packet_len = len;
1097         et = (struct ethernet_hdr *)in_packet;
1098
1099         /* too small packet? */
1100         if (len < ETHER_HDR_SIZE)
1101                 return;
1102
1103 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
1104         if (push_packet) {
1105                 (*push_packet)(in_packet, len);
1106                 return;
1107         }
1108 #endif
1109
1110 #if defined(CONFIG_CMD_CDP)
1111         /* keep track if packet is CDP */
1112         iscdp = is_cdp_packet(et->et_dest);
1113 #endif
1114
1115         myvlanid = ntohs(net_our_vlan);
1116         if (myvlanid == (ushort)-1)
1117                 myvlanid = VLAN_NONE;
1118         mynvlanid = ntohs(net_native_vlan);
1119         if (mynvlanid == (ushort)-1)
1120                 mynvlanid = VLAN_NONE;
1121
1122         eth_proto = ntohs(et->et_protlen);
1123
1124         if (eth_proto < 1514) {
1125                 struct e802_hdr *et802 = (struct e802_hdr *)et;
1126                 /*
1127                  *      Got a 802.2 packet.  Check the other protocol field.
1128                  *      XXX VLAN over 802.2+SNAP not implemented!
1129                  */
1130                 eth_proto = ntohs(et802->et_prot);
1131
1132                 ip = (struct ip_udp_hdr *)(in_packet + E802_HDR_SIZE);
1133                 len -= E802_HDR_SIZE;
1134
1135         } else if (eth_proto != PROT_VLAN) {    /* normal packet */
1136                 ip = (struct ip_udp_hdr *)(in_packet + ETHER_HDR_SIZE);
1137                 len -= ETHER_HDR_SIZE;
1138
1139         } else {                        /* VLAN packet */
1140                 struct vlan_ethernet_hdr *vet =
1141                         (struct vlan_ethernet_hdr *)et;
1142
1143                 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n");
1144
1145                 /* too small packet? */
1146                 if (len < VLAN_ETHER_HDR_SIZE)
1147                         return;
1148
1149                 /* if no VLAN active */
1150                 if ((ntohs(net_our_vlan) & VLAN_IDMASK) == VLAN_NONE
1151 #if defined(CONFIG_CMD_CDP)
1152                                 && iscdp == 0
1153 #endif
1154                                 )
1155                         return;
1156
1157                 cti = ntohs(vet->vet_tag);
1158                 vlanid = cti & VLAN_IDMASK;
1159                 eth_proto = ntohs(vet->vet_type);
1160
1161                 ip = (struct ip_udp_hdr *)(in_packet + VLAN_ETHER_HDR_SIZE);
1162                 len -= VLAN_ETHER_HDR_SIZE;
1163         }
1164
1165         debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto);
1166
1167 #if defined(CONFIG_CMD_CDP)
1168         if (iscdp) {
1169                 cdp_receive((uchar *)ip, len);
1170                 return;
1171         }
1172 #endif
1173
1174         if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1175                 if (vlanid == VLAN_NONE)
1176                         vlanid = (mynvlanid & VLAN_IDMASK);
1177                 /* not matched? */
1178                 if (vlanid != (myvlanid & VLAN_IDMASK))
1179                         return;
1180         }
1181
1182         switch (eth_proto) {
1183         case PROT_ARP:
1184                 arp_receive(et, ip, len);
1185                 break;
1186
1187 #ifdef CONFIG_CMD_RARP
1188         case PROT_RARP:
1189                 rarp_receive(ip, len);
1190                 break;
1191 #endif
1192         case PROT_IP:
1193                 debug_cond(DEBUG_NET_PKT, "Got IP\n");
1194                 /* Before we start poking the header, make sure it is there */
1195                 if (len < IP_UDP_HDR_SIZE) {
1196                         debug("len bad %d < %lu\n", len,
1197                               (ulong)IP_UDP_HDR_SIZE);
1198                         return;
1199                 }
1200                 /* Check the packet length */
1201                 if (len < ntohs(ip->ip_len)) {
1202                         debug("len bad %d < %d\n", len, ntohs(ip->ip_len));
1203                         return;
1204                 }
1205                 len = ntohs(ip->ip_len);
1206                 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n",
1207                            len, ip->ip_hl_v & 0xff);
1208
1209                 /* Can't deal with anything except IPv4 */
1210                 if ((ip->ip_hl_v & 0xf0) != 0x40)
1211                         return;
1212                 /* Can't deal with IP options (headers != 20 bytes) */
1213                 if ((ip->ip_hl_v & 0x0f) > 0x05)
1214                         return;
1215                 /* Check the Checksum of the header */
1216                 if (!ip_checksum_ok((uchar *)ip, IP_HDR_SIZE)) {
1217                         debug("checksum bad\n");
1218                         return;
1219                 }
1220                 /* If it is not for us, ignore it */
1221                 dst_ip = net_read_ip(&ip->ip_dst);
1222                 if (net_ip.s_addr && dst_ip.s_addr != net_ip.s_addr &&
1223                     dst_ip.s_addr != 0xFFFFFFFF) {
1224                                 return;
1225                 }
1226                 /* Read source IP address for later use */
1227                 src_ip = net_read_ip(&ip->ip_src);
1228                 /*
1229                  * The function returns the unchanged packet if it's not
1230                  * a fragment, and either the complete packet or NULL if
1231                  * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1232                  */
1233                 ip = net_defragment(ip, &len);
1234                 if (!ip)
1235                         return;
1236                 /*
1237                  * watch for ICMP host redirects
1238                  *
1239                  * There is no real handler code (yet). We just watch
1240                  * for ICMP host redirect messages. In case anybody
1241                  * sees these messages: please contact me
1242                  * (wd@denx.de), or - even better - send me the
1243                  * necessary fixes :-)
1244                  *
1245                  * Note: in all cases where I have seen this so far
1246                  * it was a problem with the router configuration,
1247                  * for instance when a router was configured in the
1248                  * BOOTP reply, but the TFTP server was on the same
1249                  * subnet. So this is probably a warning that your
1250                  * configuration might be wrong. But I'm not really
1251                  * sure if there aren't any other situations.
1252                  *
1253                  * Simon Glass <sjg@chromium.org>: We get an ICMP when
1254                  * we send a tftp packet to a dead connection, or when
1255                  * there is no server at the other end.
1256                  */
1257                 if (ip->ip_p == IPPROTO_ICMP) {
1258                         receive_icmp(ip, len, src_ip, et);
1259                         return;
1260                 } else if (ip->ip_p != IPPROTO_UDP) {   /* Only UDP packets */
1261                         return;
1262                 }
1263
1264                 if (ntohs(ip->udp_len) < UDP_HDR_SIZE || ntohs(ip->udp_len) > ntohs(ip->ip_len))
1265                         return;
1266
1267                 debug_cond(DEBUG_DEV_PKT,
1268                            "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1269                            &dst_ip, &src_ip, len);
1270
1271 #ifdef CONFIG_UDP_CHECKSUM
1272                 if (ip->udp_xsum != 0) {
1273                         ulong   xsum;
1274                         u8 *sumptr;
1275                         ushort  sumlen;
1276
1277                         xsum  = ip->ip_p;
1278                         xsum += (ntohs(ip->udp_len));
1279                         xsum += (ntohl(ip->ip_src.s_addr) >> 16) & 0x0000ffff;
1280                         xsum += (ntohl(ip->ip_src.s_addr) >>  0) & 0x0000ffff;
1281                         xsum += (ntohl(ip->ip_dst.s_addr) >> 16) & 0x0000ffff;
1282                         xsum += (ntohl(ip->ip_dst.s_addr) >>  0) & 0x0000ffff;
1283
1284                         sumlen = ntohs(ip->udp_len);
1285                         sumptr = (u8 *)&ip->udp_src;
1286
1287                         while (sumlen > 1) {
1288                                 /* inlined ntohs() to avoid alignment errors */
1289                                 xsum += (sumptr[0] << 8) + sumptr[1];
1290                                 sumptr += 2;
1291                                 sumlen -= 2;
1292                         }
1293                         if (sumlen > 0)
1294                                 xsum += (sumptr[0] << 8) + sumptr[0];
1295                         while ((xsum >> 16) != 0) {
1296                                 xsum = (xsum & 0x0000ffff) +
1297                                        ((xsum >> 16) & 0x0000ffff);
1298                         }
1299                         if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1300                                 printf(" UDP wrong checksum %08lx %08x\n",
1301                                        xsum, ntohs(ip->udp_xsum));
1302                                 return;
1303                         }
1304                 }
1305 #endif
1306
1307 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
1308                 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
1309                                 src_ip,
1310                                 ntohs(ip->udp_dst),
1311                                 ntohs(ip->udp_src),
1312                                 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1313 #endif
1314                 /*
1315                  * IP header OK.  Pass the packet to the current handler.
1316                  */
1317                 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
1318                                       ntohs(ip->udp_dst),
1319                                       src_ip,
1320                                       ntohs(ip->udp_src),
1321                                       ntohs(ip->udp_len) - UDP_HDR_SIZE);
1322                 break;
1323 #ifdef CONFIG_CMD_WOL
1324         case PROT_WOL:
1325                 wol_receive(ip, len);
1326                 break;
1327 #endif
1328         }
1329 }
1330
1331 /**********************************************************************/
1332
1333 static int net_check_prereq(enum proto_t protocol)
1334 {
1335         switch (protocol) {
1336                 /* Fall through */
1337 #if defined(CONFIG_CMD_PING)
1338         case PING:
1339                 if (net_ping_ip.s_addr == 0) {
1340                         puts("*** ERROR: ping address not given\n");
1341                         return 1;
1342                 }
1343                 goto common;
1344 #endif
1345 #if defined(CONFIG_CMD_SNTP)
1346         case SNTP:
1347                 if (net_ntp_server.s_addr == 0) {
1348                         puts("*** ERROR: NTP server address not given\n");
1349                         return 1;
1350                 }
1351                 goto common;
1352 #endif
1353 #if defined(CONFIG_CMD_DNS)
1354         case DNS:
1355                 if (net_dns_server.s_addr == 0) {
1356                         puts("*** ERROR: DNS server address not given\n");
1357                         return 1;
1358                 }
1359                 goto common;
1360 #endif
1361 #if defined(CONFIG_CMD_NFS)
1362         case NFS:
1363 #endif
1364                 /* Fall through */
1365         case TFTPGET:
1366         case TFTPPUT:
1367                 if (net_server_ip.s_addr == 0 && !is_serverip_in_cmd()) {
1368                         puts("*** ERROR: `serverip' not set\n");
1369                         return 1;
1370                 }
1371 #if     defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1372         defined(CONFIG_CMD_DNS)
1373 common:
1374 #endif
1375                 /* Fall through */
1376
1377         case NETCONS:
1378         case FASTBOOT:
1379         case TFTPSRV:
1380                 if (net_ip.s_addr == 0) {
1381                         puts("*** ERROR: `ipaddr' not set\n");
1382                         return 1;
1383                 }
1384                 /* Fall through */
1385
1386 #ifdef CONFIG_CMD_RARP
1387         case RARP:
1388 #endif
1389         case BOOTP:
1390         case CDP:
1391         case DHCP:
1392         case LINKLOCAL:
1393                 if (memcmp(net_ethaddr, "\0\0\0\0\0\0", 6) == 0) {
1394                         int num = eth_get_dev_index();
1395
1396                         switch (num) {
1397                         case -1:
1398                                 puts("*** ERROR: No ethernet found.\n");
1399                                 return 1;
1400                         case 0:
1401                                 puts("*** ERROR: `ethaddr' not set\n");
1402                                 break;
1403                         default:
1404                                 printf("*** ERROR: `eth%daddr' not set\n",
1405                                        num);
1406                                 break;
1407                         }
1408
1409                         net_start_again();
1410                         return 2;
1411                 }
1412                 /* Fall through */
1413         default:
1414                 return 0;
1415         }
1416         return 0;               /* OK */
1417 }
1418 /**********************************************************************/
1419
1420 int
1421 net_eth_hdr_size(void)
1422 {
1423         ushort myvlanid;
1424
1425         myvlanid = ntohs(net_our_vlan);
1426         if (myvlanid == (ushort)-1)
1427                 myvlanid = VLAN_NONE;
1428
1429         return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1430                 VLAN_ETHER_HDR_SIZE;
1431 }
1432
1433 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot)
1434 {
1435         struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
1436         ushort myvlanid;
1437
1438         myvlanid = ntohs(net_our_vlan);
1439         if (myvlanid == (ushort)-1)
1440                 myvlanid = VLAN_NONE;
1441
1442         memcpy(et->et_dest, dest_ethaddr, 6);
1443         memcpy(et->et_src, net_ethaddr, 6);
1444         if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1445                 et->et_protlen = htons(prot);
1446                 return ETHER_HDR_SIZE;
1447         } else {
1448                 struct vlan_ethernet_hdr *vet =
1449                         (struct vlan_ethernet_hdr *)xet;
1450
1451                 vet->vet_vlan_type = htons(PROT_VLAN);
1452                 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1453                 vet->vet_type = htons(prot);
1454                 return VLAN_ETHER_HDR_SIZE;
1455         }
1456 }
1457
1458 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot)
1459 {
1460         ushort protlen;
1461
1462         memcpy(et->et_dest, addr, 6);
1463         memcpy(et->et_src, net_ethaddr, 6);
1464         protlen = ntohs(et->et_protlen);
1465         if (protlen == PROT_VLAN) {
1466                 struct vlan_ethernet_hdr *vet =
1467                         (struct vlan_ethernet_hdr *)et;
1468                 vet->vet_type = htons(prot);
1469                 return VLAN_ETHER_HDR_SIZE;
1470         } else if (protlen > 1514) {
1471                 et->et_protlen = htons(prot);
1472                 return ETHER_HDR_SIZE;
1473         } else {
1474                 /* 802.2 + SNAP */
1475                 struct e802_hdr *et802 = (struct e802_hdr *)et;
1476                 et802->et_prot = htons(prot);
1477                 return E802_HDR_SIZE;
1478         }
1479 }
1480
1481 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source,
1482                        u16 pkt_len, u8 proto)
1483 {
1484         struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1485
1486         /*
1487          *      Construct an IP header.
1488          */
1489         /* IP_HDR_SIZE / 4 (not including UDP) */
1490         ip->ip_hl_v  = 0x45;
1491         ip->ip_tos   = 0;
1492         ip->ip_len   = htons(pkt_len);
1493         ip->ip_p     = proto;
1494         ip->ip_id    = htons(net_ip_id++);
1495         ip->ip_off   = htons(IP_FLAGS_DFRAG);   /* Don't fragment */
1496         ip->ip_ttl   = 255;
1497         ip->ip_sum   = 0;
1498         /* already in network byte order */
1499         net_copy_ip((void *)&ip->ip_src, &source);
1500         /* already in network byte order */
1501         net_copy_ip((void *)&ip->ip_dst, &dest);
1502
1503         ip->ip_sum   = compute_ip_checksum(ip, IP_HDR_SIZE);
1504 }
1505
1506 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport, int sport,
1507                         int len)
1508 {
1509         struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1510
1511         /*
1512          *      If the data is an odd number of bytes, zero the
1513          *      byte after the last byte so that the checksum
1514          *      will work.
1515          */
1516         if (len & 1)
1517                 pkt[IP_UDP_HDR_SIZE + len] = 0;
1518
1519         net_set_ip_header(pkt, dest, net_ip, IP_UDP_HDR_SIZE + len,
1520                           IPPROTO_UDP);
1521
1522         ip->udp_src  = htons(sport);
1523         ip->udp_dst  = htons(dport);
1524         ip->udp_len  = htons(UDP_HDR_SIZE + len);
1525         ip->udp_xsum = 0;
1526 }
1527
1528 void copy_filename(char *dst, const char *src, int size)
1529 {
1530         if (src && *src && (*src == '"')) {
1531                 ++src;
1532                 --size;
1533         }
1534
1535         while ((--size > 0) && src && *src && (*src != '"'))
1536                 *dst++ = *src++;
1537         *dst = '\0';
1538 }
1539
1540 int is_serverip_in_cmd(void)
1541 {
1542         return !!strchr(net_boot_file_name, ':');
1543 }
1544
1545 int net_parse_bootfile(struct in_addr *ipaddr, char *filename, int max_len)
1546 {
1547         char *colon;
1548
1549         if (net_boot_file_name[0] == '\0')
1550                 return 0;
1551
1552         colon = strchr(net_boot_file_name, ':');
1553         if (colon) {
1554                 if (ipaddr)
1555                         *ipaddr = string_to_ip(net_boot_file_name);
1556                 strncpy(filename, colon + 1, max_len);
1557         } else {
1558                 strncpy(filename, net_boot_file_name, max_len);
1559         }
1560         filename[max_len - 1] = '\0';
1561
1562         return 1;
1563 }
1564
1565 #if     defined(CONFIG_CMD_NFS)         || \
1566         defined(CONFIG_CMD_SNTP)        || \
1567         defined(CONFIG_CMD_DNS)
1568 /*
1569  * make port a little random (1024-17407)
1570  * This keeps the math somewhat trivial to compute, and seems to work with
1571  * all supported protocols/clients/servers
1572  */
1573 unsigned int random_port(void)
1574 {
1575         return 1024 + (get_timer(0) % 0x4000);
1576 }
1577 #endif
1578
1579 void ip_to_string(struct in_addr x, char *s)
1580 {
1581         x.s_addr = ntohl(x.s_addr);
1582         sprintf(s, "%d.%d.%d.%d",
1583                 (int) ((x.s_addr >> 24) & 0xff),
1584                 (int) ((x.s_addr >> 16) & 0xff),
1585                 (int) ((x.s_addr >> 8) & 0xff),
1586                 (int) ((x.s_addr >> 0) & 0xff)
1587         );
1588 }
1589
1590 void vlan_to_string(ushort x, char *s)
1591 {
1592         x = ntohs(x);
1593
1594         if (x == (ushort)-1)
1595                 x = VLAN_NONE;
1596
1597         if (x == VLAN_NONE)
1598                 strcpy(s, "none");
1599         else
1600                 sprintf(s, "%d", x & VLAN_IDMASK);
1601 }
1602
1603 ushort string_to_vlan(const char *s)
1604 {
1605         ushort id;
1606
1607         if (s == NULL)
1608                 return htons(VLAN_NONE);
1609
1610         if (*s < '0' || *s > '9')
1611                 id = VLAN_NONE;
1612         else
1613                 id = (ushort)simple_strtoul(s, NULL, 10);
1614
1615         return htons(id);
1616 }
1617
1618 ushort env_get_vlan(char *var)
1619 {
1620         return string_to_vlan(env_get(var));
1621 }