blob: 817c5ebd5d095c850f973b55254f2f39a8201af9 [file] [log] [blame]
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +08001// SPDX-License-Identifier: GPL-2.0
2/*
3 * WGET/HTTP support driver based on U-BOOT's nfs.c
4 * Copyright Duncan Hare <dh@synoia.com> 2017
5 */
6
Masahisa Kojima04592ad2023-11-10 13:25:34 +09007#include <asm/global_data.h>
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +08008#include <command.h>
9#include <common.h>
Michael Wallefe1489b2022-12-28 16:27:14 +010010#include <display_options.h>
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +080011#include <env.h>
12#include <image.h>
Masahisa Kojima04592ad2023-11-10 13:25:34 +090013#include <lmb.h>
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +080014#include <mapmem.h>
15#include <net.h>
16#include <net/tcp.h>
17#include <net/wget.h>
Masahisa Kojima8cf18da2023-11-10 13:25:35 +090018#include <stdlib.h>
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +080019
Masahisa Kojima04592ad2023-11-10 13:25:34 +090020DECLARE_GLOBAL_DATA_PTR;
21
Marek Vasut4caacb22023-12-13 22:11:13 +010022/* The default, change with environment variable 'httpdstp' */
23#define SERVER_PORT 80
24
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +080025static const char bootfile1[] = "GET ";
26static const char bootfile3[] = " HTTP/1.0\r\n\r\n";
27static const char http_eom[] = "\r\n\r\n";
28static const char http_ok[] = "200";
29static const char content_len[] = "Content-Length";
30static const char linefeed[] = "\r\n";
31static struct in_addr web_server_ip;
32static int our_port;
33static int wget_timeout_count;
34
35struct pkt_qd {
36 uchar *pkt;
37 unsigned int tcp_seq_num;
38 unsigned int len;
39};
40
41/*
42 * This is a control structure for out of order packets received.
43 * The actual packet bufers are in the kernel space, and are
44 * expected to be overwritten by the downloaded image.
45 */
Richard Weinbergera8bd5ec2023-07-20 14:51:56 +020046#define PKTQ_SZ (PKTBUFSRX / 4)
47static struct pkt_qd pkt_q[PKTQ_SZ];
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +080048static int pkt_q_idx;
49static unsigned long content_length;
50static unsigned int packets;
51
52static unsigned int initial_data_seq_num;
53
54static enum wget_state current_wget_state;
55
56static char *image_url;
57static unsigned int wget_timeout = WGET_TIMEOUT;
58
59static enum net_loop_state wget_loop_state;
60
61/* Timeout retry parameters */
62static u8 retry_action; /* actions for TCP retry */
63static unsigned int retry_tcp_ack_num; /* TCP retry acknowledge number*/
64static unsigned int retry_tcp_seq_num; /* TCP retry sequence number */
65static int retry_len; /* TCP retry length */
66
Masahisa Kojima04592ad2023-11-10 13:25:34 +090067static ulong wget_load_size;
68
69/**
70 * wget_init_max_size() - initialize maximum load size
71 *
72 * Return: 0 if success, -1 if fails
73 */
74static int wget_init_load_size(void)
75{
76 struct lmb lmb;
77 phys_size_t max_size;
78
79 lmb_init_and_reserve(&lmb, gd->bd, (void *)gd->fdt_blob);
80
81 max_size = lmb_get_free_size(&lmb, image_load_addr);
82 if (!max_size)
83 return -1;
84
85 wget_load_size = max_size;
86
87 return 0;
88}
89
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +080090/**
91 * store_block() - store block in memory
92 * @src: source of data
93 * @offset: offset
94 * @len: length
95 */
96static inline int store_block(uchar *src, unsigned int offset, unsigned int len)
97{
Masahisa Kojima04592ad2023-11-10 13:25:34 +090098 ulong store_addr = image_load_addr + offset;
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +080099 ulong newsize = offset + len;
100 uchar *ptr;
101
Masahisa Kojima04592ad2023-11-10 13:25:34 +0900102 if (IS_ENABLED(CONFIG_LMB)) {
103 ulong end_addr = image_load_addr + wget_load_size;
104
105 if (!end_addr)
106 end_addr = ULONG_MAX;
107
108 if (store_addr < image_load_addr ||
109 store_addr + len > end_addr) {
110 printf("\nwget error: ");
111 printf("trying to overwrite reserved memory...\n");
112 return -1;
113 }
114 }
115
116 ptr = map_sysmem(store_addr, len);
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800117 memcpy(ptr, src, len);
118 unmap_sysmem(ptr);
119
120 if (net_boot_file_size < (offset + len))
121 net_boot_file_size = newsize;
122
123 return 0;
124}
125
126/**
127 * wget_send_stored() - wget response dispatcher
128 *
129 * WARNING, This, and only this, is the place in wget.c where
130 * SEQUENCE NUMBERS are swapped between incoming (RX)
131 * and outgoing (TX).
132 * Procedure wget_handler() is correct for RX traffic.
133 */
134static void wget_send_stored(void)
135{
136 u8 action = retry_action;
137 int len = retry_len;
Dmitrii Merkurev08fb8da2023-04-12 19:49:29 +0100138 unsigned int tcp_ack_num = retry_tcp_seq_num + (len == 0 ? 1 : len);
139 unsigned int tcp_seq_num = retry_tcp_ack_num;
Marek Vasut4caacb22023-12-13 22:11:13 +0100140 unsigned int server_port;
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800141 uchar *ptr, *offset;
142
Marek Vasut4caacb22023-12-13 22:11:13 +0100143 server_port = env_get_ulong("httpdstp", 10, SERVER_PORT) & 0xffff;
144
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800145 switch (current_wget_state) {
146 case WGET_CLOSED:
147 debug_cond(DEBUG_WGET, "wget: send SYN\n");
148 current_wget_state = WGET_CONNECTING;
Marek Vasut4caacb22023-12-13 22:11:13 +0100149 net_send_tcp_packet(0, server_port, our_port, action,
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800150 tcp_seq_num, tcp_ack_num);
151 packets = 0;
152 break;
153 case WGET_CONNECTING:
154 pkt_q_idx = 0;
Marek Vasut4caacb22023-12-13 22:11:13 +0100155 net_send_tcp_packet(0, server_port, our_port, action,
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800156 tcp_seq_num, tcp_ack_num);
157
158 ptr = net_tx_packet + net_eth_hdr_size() +
159 IP_TCP_HDR_SIZE + TCP_TSOPT_SIZE + 2;
160 offset = ptr;
161
162 memcpy(offset, &bootfile1, strlen(bootfile1));
163 offset += strlen(bootfile1);
164
165 memcpy(offset, image_url, strlen(image_url));
166 offset += strlen(image_url);
167
168 memcpy(offset, &bootfile3, strlen(bootfile3));
169 offset += strlen(bootfile3);
Marek Vasut4caacb22023-12-13 22:11:13 +0100170 net_send_tcp_packet((offset - ptr), server_port, our_port,
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800171 TCP_PUSH, tcp_seq_num, tcp_ack_num);
172 current_wget_state = WGET_CONNECTED;
173 break;
174 case WGET_CONNECTED:
175 case WGET_TRANSFERRING:
176 case WGET_TRANSFERRED:
Marek Vasut4caacb22023-12-13 22:11:13 +0100177 net_send_tcp_packet(0, server_port, our_port, action,
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800178 tcp_seq_num, tcp_ack_num);
179 break;
180 }
181}
182
Dmitrii Merkurev08fb8da2023-04-12 19:49:29 +0100183static void wget_send(u8 action, unsigned int tcp_seq_num,
184 unsigned int tcp_ack_num, int len)
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800185{
186 retry_action = action;
187 retry_tcp_ack_num = tcp_ack_num;
188 retry_tcp_seq_num = tcp_seq_num;
189 retry_len = len;
190
191 wget_send_stored();
192}
193
194void wget_fail(char *error_message, unsigned int tcp_seq_num,
195 unsigned int tcp_ack_num, u8 action)
196{
197 printf("wget: Transfer Fail - %s\n", error_message);
198 net_set_timeout_handler(0, NULL);
199 wget_send(action, tcp_seq_num, tcp_ack_num, 0);
200}
201
202void wget_success(u8 action, unsigned int tcp_seq_num,
203 unsigned int tcp_ack_num, int len, int packets)
204{
205 printf("Packets received %d, Transfer Successful\n", packets);
206 wget_send(action, tcp_seq_num, tcp_ack_num, len);
207}
208
209/*
210 * Interfaces of U-BOOT
211 */
212static void wget_timeout_handler(void)
213{
214 if (++wget_timeout_count > WGET_RETRY_COUNT) {
215 puts("\nRetry count exceeded; starting again\n");
216 wget_send(TCP_RST, 0, 0, 0);
217 net_start_again();
218 } else {
219 puts("T ");
220 net_set_timeout_handler(wget_timeout +
221 WGET_TIMEOUT * wget_timeout_count,
222 wget_timeout_handler);
223 wget_send_stored();
224 }
225}
226
227#define PKT_QUEUE_OFFSET 0x20000
228#define PKT_QUEUE_PACKET_SIZE 0x800
229
230static void wget_connected(uchar *pkt, unsigned int tcp_seq_num,
Dmitrii Merkurev08fb8da2023-04-12 19:49:29 +0100231 u8 action, unsigned int tcp_ack_num, unsigned int len)
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800232{
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800233 uchar *pkt_in_q;
234 char *pos;
235 int hlen, i;
236 uchar *ptr1;
237
238 pkt[len] = '\0';
239 pos = strstr((char *)pkt, http_eom);
240
241 if (!pos) {
242 debug_cond(DEBUG_WGET,
243 "wget: Connected, data before Header %p\n", pkt);
244 pkt_in_q = (void *)image_load_addr + PKT_QUEUE_OFFSET +
245 (pkt_q_idx * PKT_QUEUE_PACKET_SIZE);
246
247 ptr1 = map_sysmem((phys_addr_t)pkt_in_q, len);
248 memcpy(ptr1, pkt, len);
249 unmap_sysmem(ptr1);
250
251 pkt_q[pkt_q_idx].pkt = pkt_in_q;
252 pkt_q[pkt_q_idx].tcp_seq_num = tcp_seq_num;
253 pkt_q[pkt_q_idx].len = len;
254 pkt_q_idx++;
Richard Weinbergera8bd5ec2023-07-20 14:51:56 +0200255
256 if (pkt_q_idx >= PKTQ_SZ) {
257 printf("wget: Fatal error, queue overrun!\n");
258 net_set_state(NETLOOP_FAIL);
259
260 return;
261 }
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800262 } else {
263 debug_cond(DEBUG_WGET, "wget: Connected HTTP Header %p\n", pkt);
264 /* sizeof(http_eom) - 1 is the string length of (http_eom) */
265 hlen = pos - (char *)pkt + sizeof(http_eom) - 1;
266 pos = strstr((char *)pkt, linefeed);
267 if (pos > 0)
268 i = pos - (char *)pkt;
269 else
270 i = hlen;
271 printf("%.*s", i, pkt);
272
273 current_wget_state = WGET_TRANSFERRING;
274
275 if (strstr((char *)pkt, http_ok) == 0) {
276 debug_cond(DEBUG_WGET,
277 "wget: Connected Bad Xfer\n");
278 initial_data_seq_num = tcp_seq_num + hlen;
279 wget_loop_state = NETLOOP_FAIL;
280 wget_send(action, tcp_seq_num, tcp_ack_num, len);
281 } else {
282 debug_cond(DEBUG_WGET,
283 "wget: Connctd pkt %p hlen %x\n",
284 pkt, hlen);
285 initial_data_seq_num = tcp_seq_num + hlen;
286
287 pos = strstr((char *)pkt, content_len);
288 if (!pos) {
289 content_length = -1;
290 } else {
291 pos += sizeof(content_len) + 2;
292 strict_strtoul(pos, 10, &content_length);
293 debug_cond(DEBUG_WGET,
294 "wget: Connected Len %lu\n",
295 content_length);
296 }
297
298 net_boot_file_size = 0;
299
Masahisa Kojima04592ad2023-11-10 13:25:34 +0900300 if (len > hlen) {
301 if (store_block(pkt + hlen, 0, len - hlen) != 0) {
302 wget_loop_state = NETLOOP_FAIL;
303 wget_fail("wget: store error\n", tcp_seq_num, tcp_ack_num, action);
304 net_set_state(NETLOOP_FAIL);
305 return;
306 }
307 }
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800308
309 debug_cond(DEBUG_WGET,
310 "wget: Connected Pkt %p hlen %x\n",
311 pkt, hlen);
312
313 for (i = 0; i < pkt_q_idx; i++) {
Masahisa Kojima04592ad2023-11-10 13:25:34 +0900314 int err;
315
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800316 ptr1 = map_sysmem(
317 (phys_addr_t)(pkt_q[i].pkt),
318 pkt_q[i].len);
Masahisa Kojima04592ad2023-11-10 13:25:34 +0900319 err = store_block(ptr1,
320 pkt_q[i].tcp_seq_num -
321 initial_data_seq_num,
322 pkt_q[i].len);
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800323 unmap_sysmem(ptr1);
324 debug_cond(DEBUG_WGET,
325 "wget: Connctd pkt Q %p len %x\n",
326 pkt_q[i].pkt, pkt_q[i].len);
Masahisa Kojima04592ad2023-11-10 13:25:34 +0900327 if (err) {
328 wget_loop_state = NETLOOP_FAIL;
329 wget_fail("wget: store error\n", tcp_seq_num, tcp_ack_num, action);
330 net_set_state(NETLOOP_FAIL);
331 return;
332 }
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800333 }
334 }
335 }
336 wget_send(action, tcp_seq_num, tcp_ack_num, len);
337}
338
339/**
Dmitrii Merkurev08fb8da2023-04-12 19:49:29 +0100340 * wget_handler() - TCP handler of wget
341 * @pkt: pointer to the application packet
342 * @dport: destination TCP port
343 * @sip: source IP address
344 * @sport: source TCP port
345 * @tcp_seq_num: TCP sequential number
346 * @tcp_ack_num: TCP acknowledgment number
347 * @action: TCP action (SYN, ACK, FIN, etc)
348 * @len: packet length
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800349 *
350 * In the "application push" invocation, the TCP header with all
351 * its information is pointed to by the packet pointer.
352 */
Dmitrii Merkurev08fb8da2023-04-12 19:49:29 +0100353static void wget_handler(uchar *pkt, u16 dport,
354 struct in_addr sip, u16 sport,
355 u32 tcp_seq_num, u32 tcp_ack_num,
356 u8 action, unsigned int len)
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800357{
358 enum tcp_state wget_tcp_state = tcp_get_tcp_state();
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800359
360 net_set_timeout_handler(wget_timeout, wget_timeout_handler);
361 packets++;
362
363 switch (current_wget_state) {
364 case WGET_CLOSED:
365 debug_cond(DEBUG_WGET, "wget: Handler: Error!, State wrong\n");
366 break;
367 case WGET_CONNECTING:
368 debug_cond(DEBUG_WGET,
Dmitrii Merkurev08fb8da2023-04-12 19:49:29 +0100369 "wget: Connecting In len=%x, Seq=%u, Ack=%u\n",
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800370 len, tcp_seq_num, tcp_ack_num);
371 if (!len) {
372 if (wget_tcp_state == TCP_ESTABLISHED) {
373 debug_cond(DEBUG_WGET,
374 "wget: Cting, send, len=%x\n", len);
375 wget_send(action, tcp_seq_num, tcp_ack_num,
376 len);
377 } else {
378 printf("%.*s", len, pkt);
379 wget_fail("wget: Handler Connected Fail\n",
380 tcp_seq_num, tcp_ack_num, action);
381 }
382 }
383 break;
384 case WGET_CONNECTED:
Dmitrii Merkurev08fb8da2023-04-12 19:49:29 +0100385 debug_cond(DEBUG_WGET, "wget: Connected seq=%u, len=%x\n",
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800386 tcp_seq_num, len);
387 if (!len) {
388 wget_fail("Image not found, no data returned\n",
389 tcp_seq_num, tcp_ack_num, action);
390 } else {
Dmitrii Merkurev08fb8da2023-04-12 19:49:29 +0100391 wget_connected(pkt, tcp_seq_num, action, tcp_ack_num, len);
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800392 }
393 break;
394 case WGET_TRANSFERRING:
395 debug_cond(DEBUG_WGET,
396 "wget: Transferring, seq=%x, ack=%x,len=%x\n",
397 tcp_seq_num, tcp_ack_num, len);
398
399 if (tcp_seq_num >= initial_data_seq_num &&
400 store_block(pkt, tcp_seq_num - initial_data_seq_num,
401 len) != 0) {
402 wget_fail("wget: store error\n",
403 tcp_seq_num, tcp_ack_num, action);
Masahisa Kojima04592ad2023-11-10 13:25:34 +0900404 net_set_state(NETLOOP_FAIL);
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800405 return;
406 }
407
408 switch (wget_tcp_state) {
409 case TCP_FIN_WAIT_2:
410 wget_send(TCP_ACK, tcp_seq_num, tcp_ack_num, len);
411 fallthrough;
412 case TCP_SYN_SENT:
Dmitrii Merkurev08fb8da2023-04-12 19:49:29 +0100413 case TCP_SYN_RECEIVED:
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800414 case TCP_CLOSING:
415 case TCP_FIN_WAIT_1:
416 case TCP_CLOSED:
417 net_set_state(NETLOOP_FAIL);
418 break;
419 case TCP_ESTABLISHED:
420 wget_send(TCP_ACK, tcp_seq_num, tcp_ack_num,
421 len);
422 wget_loop_state = NETLOOP_SUCCESS;
423 break;
424 case TCP_CLOSE_WAIT: /* End of transfer */
425 current_wget_state = WGET_TRANSFERRED;
426 wget_send(action | TCP_ACK | TCP_FIN,
427 tcp_seq_num, tcp_ack_num, len);
428 break;
429 }
430 break;
431 case WGET_TRANSFERRED:
432 printf("Packets received %d, Transfer Successful\n", packets);
433 net_set_state(wget_loop_state);
434 break;
435 }
436}
437
438#define RANDOM_PORT_START 1024
439#define RANDOM_PORT_RANGE 0x4000
440
441/**
442 * random_port() - make port a little random (1024-17407)
443 *
444 * Return: random port number from 1024 to 17407
445 *
446 * This keeps the math somewhat trivial to compute, and seems to work with
447 * all supported protocols/clients/servers
448 */
449static unsigned int random_port(void)
450{
451 return RANDOM_PORT_START + (get_timer(0) % RANDOM_PORT_RANGE);
452}
453
454#define BLOCKSIZE 512
455
456void wget_start(void)
457{
458 image_url = strchr(net_boot_file_name, ':');
459 if (image_url > 0) {
460 web_server_ip = string_to_ip(net_boot_file_name);
461 ++image_url;
462 net_server_ip = web_server_ip;
463 } else {
464 web_server_ip = net_server_ip;
465 image_url = net_boot_file_name;
466 }
467
468 debug_cond(DEBUG_WGET,
469 "wget: Transfer HTTP Server %pI4; our IP %pI4\n",
470 &web_server_ip, &net_ip);
471
472 /* Check if we need to send across this subnet */
473 if (net_gateway.s_addr && net_netmask.s_addr) {
474 struct in_addr our_net;
475 struct in_addr server_net;
476
477 our_net.s_addr = net_ip.s_addr & net_netmask.s_addr;
478 server_net.s_addr = net_server_ip.s_addr & net_netmask.s_addr;
479 if (our_net.s_addr != server_net.s_addr)
480 debug_cond(DEBUG_WGET,
481 "wget: sending through gateway %pI4",
482 &net_gateway);
483 }
484 debug_cond(DEBUG_WGET, "URL '%s'\n", image_url);
485
486 if (net_boot_file_expected_size_in_blocks) {
487 debug_cond(DEBUG_WGET, "wget: Size is 0x%x Bytes = ",
488 net_boot_file_expected_size_in_blocks * BLOCKSIZE);
489 print_size(net_boot_file_expected_size_in_blocks * BLOCKSIZE,
490 "");
491 }
492 debug_cond(DEBUG_WGET,
493 "\nwget:Load address: 0x%lx\nLoading: *\b", image_load_addr);
494
Masahisa Kojima04592ad2023-11-10 13:25:34 +0900495 if (IS_ENABLED(CONFIG_LMB)) {
496 if (wget_init_load_size()) {
497 printf("\nwget error: ");
498 printf("trying to overwrite reserved memory...\n");
499 net_set_state(NETLOOP_FAIL);
500 return;
501 }
502 }
503
Ying-Chun Liu (PaulLiu)cfbae482022-11-08 14:17:29 +0800504 net_set_timeout_handler(wget_timeout, wget_timeout_handler);
505 tcp_set_tcp_handler(wget_handler);
506
507 wget_timeout_count = 0;
508 current_wget_state = WGET_CLOSED;
509
510 our_port = random_port();
511
512 /*
513 * Zero out server ether to force arp resolution in case
514 * the server ip for the previous u-boot command, for example dns
515 * is not the same as the web server ip.
516 */
517
518 memset(net_server_ethaddr, 0, 6);
519
520 wget_send(TCP_SYN, 0, 0, 0);
521}
Masahisa Kojima8cf18da2023-11-10 13:25:35 +0900522
523#if (IS_ENABLED(CONFIG_CMD_DNS))
524int wget_with_dns(ulong dst_addr, char *uri)
525{
526 int ret;
527 char *s, *host_name, *file_name, *str_copy;
528
529 /*
530 * Download file using wget.
531 *
532 * U-Boot wget takes the target uri in this format.
533 * "<http server ip>:<file path>" e.g.) 192.168.1.1:/sample/test.iso
534 * Need to resolve the http server ip address before starting wget.
535 */
536 str_copy = strdup(uri);
537 if (!str_copy)
538 return -ENOMEM;
539
540 s = str_copy + strlen("http://");
541 host_name = strsep(&s, "/");
542 if (!s) {
543 log_err("Error: invalied uri, no file path\n");
544 ret = -EINVAL;
545 goto out;
546 }
547 file_name = s;
548
549 /* TODO: If the given uri has ip address for the http server, skip dns */
550 net_dns_resolve = host_name;
551 net_dns_env_var = "httpserverip";
552 if (net_loop(DNS) < 0) {
553 log_err("Error: dns lookup of %s failed, check setup\n", net_dns_resolve);
554 ret = -EINVAL;
555 goto out;
556 }
557 s = env_get("httpserverip");
558 if (!s) {
559 ret = -EINVAL;
560 goto out;
561 }
562
563 strlcpy(net_boot_file_name, s, sizeof(net_boot_file_name));
564 strlcat(net_boot_file_name, ":/", sizeof(net_boot_file_name)); /* append '/' which is removed by strsep() */
565 strlcat(net_boot_file_name, file_name, sizeof(net_boot_file_name));
566 image_load_addr = dst_addr;
567 ret = net_loop(WGET);
568
569out:
570 free(str_copy);
571
572 return ret;
573}
574#endif
Masahisa Kojimaf01c9612023-11-10 13:25:41 +0900575
576/**
577 * wget_validate_uri() - validate the uri for wget
578 *
579 * @uri: uri string
580 *
581 * This function follows the current U-Boot wget implementation.
582 * scheme: only "http:" is supported
583 * authority:
584 * - user information: not supported
585 * - host: supported
586 * - port: not supported(always use the default port)
587 *
588 * Uri is expected to be correctly percent encoded.
589 * This is the minimum check, control codes(0x1-0x19, 0x7F, except '\0')
590 * and space character(0x20) are not allowed.
591 *
592 * TODO: stricter uri conformance check
593 *
594 * Return: true on success, false on failure
595 */
596bool wget_validate_uri(char *uri)
597{
598 char c;
599 bool ret = true;
600 char *str_copy, *s, *authority;
601
602 for (c = 0x1; c < 0x21; c++) {
603 if (strchr(uri, c)) {
604 log_err("invalid character is used\n");
605 return false;
606 }
607 }
608 if (strchr(uri, 0x7f)) {
609 log_err("invalid character is used\n");
610 return false;
611 }
612
613 if (strncmp(uri, "http://", 7)) {
614 log_err("only http:// is supported\n");
615 return false;
616 }
617 str_copy = strdup(uri);
618 if (!str_copy)
619 return false;
620
621 s = str_copy + strlen("http://");
622 authority = strsep(&s, "/");
623 if (!s) {
624 log_err("invalid uri, no file path\n");
625 ret = false;
626 goto out;
627 }
628 s = strchr(authority, '@');
629 if (s) {
630 log_err("user information is not supported\n");
631 ret = false;
632 goto out;
633 }
634 s = strchr(authority, ':');
635 if (s) {
636 log_err("user defined port is not supported\n");
637 ret = false;
638 goto out;
639 }
640
641out:
642 free(str_copy);
643
644 return ret;
645}