enduser_setup.c 50 KB

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  1. /*
  2. * Copyright 2015 Robert Foss. All rights reserved.
  3. *
  4. * Redistribution and use in source and binary forms, with or without
  5. * modification, are permitted provided that the following conditions
  6. * are met:
  7. *
  8. * - Redistributions of source code must retain the above copyright
  9. * notice, this list of conditions and the following disclaimer.
  10. * - Redistributions in binary form must reproduce the above copyright
  11. * notice, this list of conditions and the following disclaimer in the
  12. * documentation and/or other materials provided with the
  13. * distribution.
  14. * - Neither the name of the copyright holders nor the names of
  15. * its contributors may be used to endorse or promote products derived
  16. * from this software without specific prior written permission.
  17. *
  18. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19. * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20. * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  21. * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
  22. * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  23. * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  24. * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  25. * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  27. * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28. * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  29. * OF THE POSSIBILITY OF SUCH DAMAGE.
  30. *
  31. * @author Robert Foss <dev@robertfoss.se>
  32. *
  33. * Additions & fixes: Johny Mattsson <jmattsson@dius.com.au>
  34. * Jason Follas <jfollas@gmail.com>
  35. */
  36. #include "module.h"
  37. #include "lauxlib.h"
  38. #include "lmem.h"
  39. #include "platform.h"
  40. #include "c_stdlib.h"
  41. #include "c_stdio.h"
  42. #include "c_string.h"
  43. #include "ctype.h"
  44. #include "user_interface.h"
  45. #include "espconn.h"
  46. #include "lwip/tcp.h"
  47. #include "lwip/pbuf.h"
  48. #include "vfs.h"
  49. #include "task/task.h"
  50. /* Set this to 1 to generate debug messages. Uses debug callback provided by Lua. Example: enduser_setup.start(successFn, print, print) */
  51. #define ENDUSER_SETUP_DEBUG_ENABLE 0
  52. /* Set this to 1 to output the contents of HTTP requests when debugging. Useful if you need it, but can get pretty noisy */
  53. #define ENDUSER_SETUP_DEBUG_SHOW_HTTP_REQUEST 0
  54. #define MIN(x, y) (((x) < (y)) ? (x) : (y))
  55. #define LITLEN(strliteral) (sizeof (strliteral) -1)
  56. #define STRINGIFY(x) #x
  57. #define NUMLEN(x) (sizeof(STRINGIFY(x)) - 1)
  58. #define ENDUSER_SETUP_ERR_FATAL (1 << 0)
  59. #define ENDUSER_SETUP_ERR_NONFATAL (1 << 1)
  60. #define ENDUSER_SETUP_ERR_NO_RETURN (1 << 2)
  61. #define ENDUSER_SETUP_ERR_OUT_OF_MEMORY 1
  62. #define ENDUSER_SETUP_ERR_CONNECTION_NOT_FOUND 2
  63. #define ENDUSER_SETUP_ERR_UNKOWN_ERROR 3
  64. #define ENDUSER_SETUP_ERR_SOCKET_ALREADY_OPEN 4
  65. #define ENDUSER_SETUP_ERR_MAX_NUMBER 5
  66. #define ENDUSER_SETUP_ERR_ALREADY_INITIALIZED 6
  67. /**
  68. * DNS Response Packet:
  69. *
  70. * |DNS ID - 16 bits|
  71. * |dns_header|
  72. * |QNAME|
  73. * |dns_body|
  74. * |ip - 32 bits|
  75. *
  76. * DNS Header Part | FLAGS | | Q COUNT | | A CNT | |AUTH CNT| | ADD CNT| */
  77. static const char dns_header[] = { 0x80, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00 };
  78. /* DNS Query Part | Q TYPE | | Q CLASS| */
  79. static const char dns_body[] = { 0x00, 0x01, 0x00, 0x01,
  80. /* DNS Answer Part |LBL OFFS| | TYPE | | CLASS | | TTL | | RD LEN | */
  81. 0xC0, 0x0C, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x78, 0x00, 0x04 };
  82. static const char http_html_gz_filename[] = "enduser_setup.html.gz";
  83. static const char http_html_filename[] = "enduser_setup.html";
  84. static const char http_header_200[] = "HTTP/1.1 200 OK\r\nCache-control:no-cache\r\nConnection:close\r\nContent-Type:text/html\r\n"; /* Note single \r\n here! */
  85. static const char http_header_204[] = "HTTP/1.1 204 No Content\r\nContent-Length:0\r\nConnection:close\r\n\r\n";
  86. static const char http_header_302[] = "HTTP/1.1 302 Moved\r\nLocation: /\r\nContent-Length:0\r\nConnection:close\r\n\r\n";
  87. static const char http_header_400[] = "HTTP/1.1 400 Bad request\r\nContent-Length:0\r\nConnection:close\r\n\r\n";
  88. static const char http_header_404[] = "HTTP/1.1 404 Not found\r\nContent-Length:0\r\nConnection:close\r\n\r\n";
  89. static const char http_header_405[] = "HTTP/1.1 405 Method Not Allowed\r\nContent-Length:0\r\nConnection:close\r\n\r\n";
  90. static const char http_header_500[] = "HTTP/1.1 500 Internal Error\r\nContent-Length:0\r\nConnection:close\r\n\r\n";
  91. static const char http_header_content_len_fmt[] = "Content-length:%5d\r\n\r\n";
  92. static const char http_html_gzip_contentencoding[] = "Content-Encoding: gzip\r\n";
  93. /* Externally defined: static const char http_html_backup[] = ... */
  94. #include "eus/http_html_backup.def"
  95. typedef struct scan_listener
  96. {
  97. struct tcp_pcb *conn;
  98. struct scan_listener *next;
  99. } scan_listener_t;
  100. typedef struct
  101. {
  102. struct espconn *espconn_dns_udp;
  103. struct tcp_pcb *http_pcb;
  104. char *http_payload_data;
  105. uint32_t http_payload_len;
  106. os_timer_t check_station_timer;
  107. os_timer_t shutdown_timer;
  108. int lua_connected_cb_ref;
  109. int lua_err_cb_ref;
  110. int lua_dbg_cb_ref;
  111. scan_listener_t *scan_listeners;
  112. uint8_t softAPchannel;
  113. uint8_t success;
  114. uint8_t callbackDone;
  115. uint8_t lastStationStatus;
  116. uint8_t connecting;
  117. } enduser_setup_state_t;
  118. static enduser_setup_state_t *state;
  119. static bool manual = false;
  120. static task_handle_t do_station_cfg_handle;
  121. static int enduser_setup_manual(lua_State* L);
  122. static int enduser_setup_start(lua_State* L);
  123. static int enduser_setup_stop(lua_State* L);
  124. static void enduser_setup_stop_callback(void *ptr);
  125. static void enduser_setup_station_start(void);
  126. static void enduser_setup_ap_start(void);
  127. static void enduser_setup_ap_stop(void);
  128. static void enduser_setup_check_station(void *p);
  129. static void enduser_setup_debug(int line, const char *str);
  130. #if ENDUSER_SETUP_DEBUG_ENABLE
  131. #define ENDUSER_SETUP_DEBUG(str) enduser_setup_debug(__LINE__, str)
  132. #else
  133. #define ENDUSER_SETUP_DEBUG(str) do {} while(0)
  134. #endif
  135. #define ENDUSER_SETUP_ERROR(str, err, err_severity) \
  136. do { \
  137. ENDUSER_SETUP_DEBUG(str); \
  138. if (err_severity & ENDUSER_SETUP_ERR_FATAL) enduser_setup_stop(lua_getstate());\
  139. enduser_setup_error(__LINE__, str, err);\
  140. if (!(err_severity & ENDUSER_SETUP_ERR_NO_RETURN)) \
  141. return err; \
  142. } while (0)
  143. #define ENDUSER_SETUP_ERROR_VOID(str, err, err_severity) \
  144. do { \
  145. ENDUSER_SETUP_DEBUG(str); \
  146. if (err_severity & ENDUSER_SETUP_ERR_FATAL) enduser_setup_stop(lua_getstate());\
  147. enduser_setup_error(__LINE__, str, err);\
  148. if (!(err_severity & ENDUSER_SETUP_ERR_NO_RETURN)) \
  149. return; \
  150. } while (0)
  151. static void enduser_setup_debug(int line, const char *str)
  152. {
  153. lua_State *L = lua_getstate();
  154. if(state != NULL && state->lua_dbg_cb_ref != LUA_NOREF)
  155. {
  156. lua_rawgeti(L, LUA_REGISTRYINDEX, state->lua_dbg_cb_ref);
  157. lua_pushfstring(L, "%d: \t%s", line, str);
  158. lua_call(L, 1, 0);
  159. }
  160. }
  161. static void enduser_setup_error(int line, const char *str, int err)
  162. {
  163. ENDUSER_SETUP_DEBUG("enduser_setup_error");
  164. lua_State *L = lua_getstate();
  165. if (state != NULL && state->lua_err_cb_ref != LUA_NOREF)
  166. {
  167. lua_rawgeti (L, LUA_REGISTRYINDEX, state->lua_err_cb_ref);
  168. lua_pushnumber(L, err);
  169. lua_pushfstring(L, "%d: \t%s", line, str);
  170. lua_call (L, 2, 0);
  171. }
  172. }
  173. static void enduser_setup_connected_callback()
  174. {
  175. ENDUSER_SETUP_DEBUG("enduser_setup_connected_callback");
  176. lua_State *L = lua_getstate();
  177. if (state != NULL && state->lua_connected_cb_ref != LUA_NOREF)
  178. {
  179. lua_rawgeti(L, LUA_REGISTRYINDEX, state->lua_connected_cb_ref);
  180. lua_call(L, 0, 0);
  181. }
  182. }
  183. static void enduser_setup_check_station_start(void)
  184. {
  185. ENDUSER_SETUP_DEBUG("enduser_setup_check_station_start");
  186. os_timer_setfn(&(state->check_station_timer), enduser_setup_check_station, NULL);
  187. os_timer_arm(&(state->check_station_timer), 3*1000, TRUE);
  188. }
  189. static void enduser_setup_check_station_stop(void)
  190. {
  191. ENDUSER_SETUP_DEBUG("enduser_setup_check_station_stop");
  192. if (state != NULL)
  193. {
  194. os_timer_disarm(&(state->check_station_timer));
  195. }
  196. }
  197. /**
  198. * Check Station
  199. *
  200. * Check that we've successfully entered station mode.
  201. */
  202. static void enduser_setup_check_station(void *p)
  203. {
  204. ENDUSER_SETUP_DEBUG("enduser_setup_check_station");
  205. (void)p;
  206. struct ip_info ip;
  207. c_memset(&ip, 0, sizeof(struct ip_info));
  208. wifi_get_ip_info(STATION_IF, &ip);
  209. int i;
  210. char has_ip = 0;
  211. for (i = 0; i < sizeof(struct ip_info); ++i)
  212. {
  213. has_ip |= ((char *) &ip)[i];
  214. }
  215. uint8_t currChan = wifi_get_channel();
  216. if (has_ip == 0)
  217. {
  218. /* No IP Address yet, so check the reported status */
  219. uint8_t curr_status = wifi_station_get_connect_status();
  220. char buf[20];
  221. c_sprintf(buf, "status=%d,chan=%d", curr_status, currChan);
  222. ENDUSER_SETUP_DEBUG(buf);
  223. if (curr_status == 2 || curr_status == 3 || curr_status == 4)
  224. {
  225. state->connecting = 0;
  226. /* If the status is an error status and the channel changed, then cache the
  227. * status to state since the Station won't be able to report the same status
  228. * after switching the channel back to the SoftAP's
  229. */
  230. if (currChan != state->softAPchannel) {
  231. state->lastStationStatus = curr_status;
  232. ENDUSER_SETUP_DEBUG("Turning off Station due to different channel than AP");
  233. wifi_station_disconnect();
  234. wifi_set_opmode(SOFTAP_MODE);
  235. enduser_setup_ap_start();
  236. }
  237. }
  238. return;
  239. }
  240. state->success = 1;
  241. state->lastStationStatus = 5; /* We have an IP Address, so the status is 5 (as of SDK 1.5.1) */
  242. state->connecting = 0;
  243. #if ENDUSER_SETUP_DEBUG_ENABLE
  244. char debuginfo[100];
  245. c_sprintf(debuginfo, "AP_CHAN: %d, STA_CHAN: %d", state->softAPchannel, currChan);
  246. ENDUSER_SETUP_DEBUG(debuginfo);
  247. #endif
  248. if (currChan == state->softAPchannel)
  249. {
  250. enduser_setup_connected_callback();
  251. state->callbackDone = 1;
  252. }
  253. else
  254. {
  255. ENDUSER_SETUP_DEBUG("Turning off Station due to different channel than AP");
  256. wifi_station_disconnect();
  257. wifi_set_opmode(SOFTAP_MODE);
  258. enduser_setup_ap_start();
  259. }
  260. enduser_setup_check_station_stop();
  261. /* Trigger shutdown, but allow time for HTTP client to fetch last status. */
  262. if (!manual)
  263. {
  264. os_timer_setfn(&(state->shutdown_timer), enduser_setup_stop_callback, NULL);
  265. os_timer_arm(&(state->shutdown_timer), 10*1000, FALSE);
  266. }
  267. }
  268. /* --- Connection closing handling ----------------------------------------- */
  269. /* It is far more memory efficient to let the other end close the connection
  270. * first and respond to that, than us initiating the closing. The latter
  271. * seems to leave the pcb in a fin_wait state for a long time, which can
  272. * starve us of memory over time.
  273. *
  274. * By instead using the poll function to schedule a hard abort a few seconds
  275. * from now we achieve a deadline close. The downside is a (very) slight
  276. * risk of dropping the connection early, but in this application that's
  277. * hidden by the retries on the JavaScript side anyway.
  278. */
  279. /* Callback on timeout to hard-close a connection */
  280. static err_t force_abort (void *arg, struct tcp_pcb *pcb)
  281. {
  282. ENDUSER_SETUP_DEBUG("force_abort");
  283. (void)arg;
  284. tcp_poll (pcb, 0, 0);
  285. tcp_abort (pcb);
  286. return ERR_ABRT;
  287. }
  288. /* Callback to detect a remote-close of a connection */
  289. static err_t handle_remote_close (void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
  290. {
  291. ENDUSER_SETUP_DEBUG("handle_remote_close");
  292. (void)arg; (void)err;
  293. if (p) /* server sent us data, just ACK and move on */
  294. {
  295. tcp_recved (pcb, p->tot_len);
  296. pbuf_free (p);
  297. }
  298. else /* hey, remote end closed, we can do a soft close safely, yay! */
  299. {
  300. tcp_recv (pcb, 0);
  301. tcp_poll (pcb, 0, 0);
  302. tcp_close (pcb);
  303. }
  304. return ERR_OK;
  305. }
  306. /* Set up a deferred close of a connection, as discussed above. */
  307. static inline void deferred_close (struct tcp_pcb *pcb)
  308. {
  309. ENDUSER_SETUP_DEBUG("deferred_close");
  310. tcp_poll (pcb, force_abort, 15); /* ~3sec from now */
  311. tcp_recv (pcb, handle_remote_close);
  312. tcp_sent (pcb, 0);
  313. }
  314. /* Convenience function to queue up a close-after-send. */
  315. static err_t close_once_sent (void *arg, struct tcp_pcb *pcb, u16_t len)
  316. {
  317. ENDUSER_SETUP_DEBUG("close_once_sent");
  318. (void)arg; (void)len;
  319. deferred_close (pcb);
  320. return ERR_OK;
  321. }
  322. /* ------------------------------------------------------------------------- */
  323. /**
  324. * Search String
  325. *
  326. * Search string for first occurance of any char in srch_str.
  327. *
  328. * @return -1 iff no occurance of char was found.
  329. */
  330. static int enduser_setup_srch_str(const char *str, const char *srch_str)
  331. {
  332. char *found = strpbrk (str, srch_str);
  333. if (!found)
  334. {
  335. return -1;
  336. }
  337. else
  338. {
  339. return found - str;
  340. }
  341. }
  342. /**
  343. * Load HTTP Payload
  344. *
  345. * @return - 0 iff payload loaded successfully
  346. * 1 iff backup html was loaded
  347. * 2 iff out of memory
  348. */
  349. static int enduser_setup_http_load_payload(void)
  350. {
  351. ENDUSER_SETUP_DEBUG("enduser_setup_http_load_payload");
  352. int err = VFS_RES_ERR;
  353. int err2 = VFS_RES_ERR;
  354. int file_len = 0;
  355. /* Try to open enduser_setup.html.gz from SPIFFS first */
  356. int f = vfs_open(http_html_gz_filename, "r");
  357. if (f)
  358. {
  359. err = vfs_lseek(f, 0, VFS_SEEK_END);
  360. file_len = (int) vfs_tell(f);
  361. err2 = vfs_lseek(f, 0, VFS_SEEK_SET);
  362. }
  363. if (!f || err == VFS_RES_ERR || err2 == VFS_RES_ERR)
  364. {
  365. if (f)
  366. {
  367. vfs_close(f);
  368. }
  369. /* If that didn't work, try to open enduser_setup.html from SPIFFS */
  370. f = vfs_open(http_html_filename, "r");
  371. if (f)
  372. {
  373. err = vfs_lseek(f, 0, VFS_SEEK_END);
  374. file_len = (int) vfs_tell(f);
  375. err2 = vfs_lseek(f, 0, VFS_SEEK_SET);
  376. }
  377. }
  378. char cl_hdr[30];
  379. size_t ce_len = 0;
  380. c_sprintf(cl_hdr, http_header_content_len_fmt, file_len);
  381. size_t cl_len = c_strlen(cl_hdr);
  382. if (!f || err == VFS_RES_ERR || err2 == VFS_RES_ERR)
  383. {
  384. ENDUSER_SETUP_DEBUG("Unable to load file enduser_setup.html, loading backup HTML...");
  385. c_sprintf(cl_hdr, http_header_content_len_fmt, sizeof(http_html_backup));
  386. cl_len = c_strlen(cl_hdr);
  387. int html_len = LITLEN(http_html_backup);
  388. if (http_html_backup[0] == 0x1f && http_html_backup[1] == 0x8b)
  389. {
  390. ce_len = c_strlen(http_html_gzip_contentencoding);
  391. html_len = http_html_backup_len; /* Defined in eus/http_html_backup.def by xxd -i */
  392. ENDUSER_SETUP_DEBUG("Content is gzipped");
  393. }
  394. int payload_len = LITLEN(http_header_200) + cl_len + ce_len + html_len;
  395. state->http_payload_len = payload_len;
  396. state->http_payload_data = (char *) c_malloc(payload_len);
  397. if (state->http_payload_data == NULL)
  398. {
  399. return 2;
  400. }
  401. int offset = 0;
  402. c_memcpy(&(state->http_payload_data[offset]), &(http_header_200), LITLEN(http_header_200));
  403. offset += LITLEN(http_header_200);
  404. if (ce_len > 0)
  405. {
  406. offset += c_sprintf(state->http_payload_data + offset, http_html_gzip_contentencoding, ce_len);
  407. }
  408. c_memcpy(&(state->http_payload_data[offset]), &(cl_hdr), cl_len);
  409. offset += cl_len;
  410. c_memcpy(&(state->http_payload_data[offset]), &(http_html_backup), sizeof(http_html_backup));
  411. return 1;
  412. }
  413. char magic[2];
  414. vfs_read(f, magic, 2);
  415. if (magic[0] == 0x1f && magic[1] == 0x8b)
  416. {
  417. ce_len = c_strlen(http_html_gzip_contentencoding);
  418. ENDUSER_SETUP_DEBUG("Content is gzipped");
  419. }
  420. int payload_len = LITLEN(http_header_200) + cl_len + ce_len + file_len;
  421. state->http_payload_len = payload_len;
  422. state->http_payload_data = (char *) c_malloc(payload_len);
  423. if (state->http_payload_data == NULL)
  424. {
  425. return 2;
  426. }
  427. vfs_lseek(f, 0, VFS_SEEK_SET);
  428. int offset = 0;
  429. c_memcpy(&(state->http_payload_data[offset]), &(http_header_200), LITLEN(http_header_200));
  430. offset += LITLEN(http_header_200);
  431. if (ce_len > 0)
  432. {
  433. offset += c_sprintf(state->http_payload_data + offset, http_html_gzip_contentencoding, ce_len);
  434. }
  435. c_memcpy(&(state->http_payload_data[offset]), &(cl_hdr), cl_len);
  436. offset += cl_len;
  437. vfs_read(f, &(state->http_payload_data[offset]), file_len);
  438. vfs_close(f);
  439. return 0;
  440. }
  441. /**
  442. * De-escape URL data
  443. *
  444. * Parse escaped and form encoded data of request.
  445. *
  446. * @return - return 0 iff the HTTP parameter is decoded into a valid string.
  447. */
  448. static int enduser_setup_http_urldecode(char *dst, const char *src, int src_len, int dst_len)
  449. {
  450. ENDUSER_SETUP_DEBUG("enduser_setup_http_urldecode");
  451. char *dst_start = dst;
  452. char *dst_last = dst + dst_len - 1; /* -1 to reserve space for last \0 */
  453. char a, b;
  454. int i;
  455. for (i = 0; i < src_len && *src && dst < dst_last; ++i)
  456. {
  457. if ((*src == '%') && ((a = src[1]) && (b = src[2])) && (isxdigit(a) && isxdigit(b)))
  458. {
  459. if (a >= 'a')
  460. {
  461. a -= 'a'-'A';
  462. }
  463. if (a >= 'A')
  464. {
  465. a -= ('A' - 10);
  466. }
  467. else
  468. {
  469. a -= '0';
  470. }
  471. if (b >= 'a')
  472. {
  473. b -= 'a'-'A';
  474. }
  475. if (b >= 'A')
  476. {
  477. b -= ('A' - 10);
  478. }
  479. else
  480. {
  481. b -= '0';
  482. }
  483. *dst++ = 16 * a + b;
  484. src += 3;
  485. i += 2;
  486. } else {
  487. char c = *src++;
  488. if (c == '+')
  489. {
  490. c = ' ';
  491. }
  492. *dst++ = c;
  493. }
  494. }
  495. *dst++ = '\0';
  496. return (i < src_len); /* did we fail to process all the input? */
  497. }
  498. /**
  499. * Task to do the actual station configuration.
  500. * This config *cannot* be done in the network receive callback or serious
  501. * issues like memory corruption occur.
  502. */
  503. static void do_station_cfg (task_param_t param, uint8_t prio)
  504. {
  505. ENDUSER_SETUP_DEBUG("do_station_cfg");
  506. state->connecting = 1;
  507. struct station_config *cnf = (struct station_config *)param;
  508. (void)prio;
  509. /* Best-effort disconnect-reconfig-reconnect. If the device is currently
  510. * connected, the disconnect will work but the connect will report failure
  511. * (though it will actually start connecting). If the devices is not
  512. * connected, the disconnect may fail but the connect will succeed. A
  513. * solid head-in-the-sand approach seems to be the best tradeoff on
  514. * functionality-vs-code-size.
  515. * TODO: maybe use an error callback to at least report if the set config
  516. * call fails.
  517. */
  518. wifi_station_disconnect ();
  519. wifi_station_set_config (cnf);
  520. wifi_station_connect ();
  521. luaM_free(lua_getstate(), cnf);
  522. }
  523. /**
  524. * Handle HTTP Credentials
  525. *
  526. * @return - return 0 iff credentials are found and handled successfully
  527. * return 1 iff credentials aren't found
  528. * return 2 iff an error occured
  529. */
  530. static int enduser_setup_http_handle_credentials(char *data, unsigned short data_len)
  531. {
  532. ENDUSER_SETUP_DEBUG("enduser_setup_http_handle_credentials");
  533. state->success = 0;
  534. state->lastStationStatus = 0;
  535. char *name_str = (char *) ((uint32_t)strstr(&(data[6]), "wifi_ssid="));
  536. char *pwd_str = (char *) ((uint32_t)strstr(&(data[6]), "wifi_password="));
  537. if (name_str == NULL || pwd_str == NULL)
  538. {
  539. ENDUSER_SETUP_DEBUG("Password or SSID string not found");
  540. return 1;
  541. }
  542. int name_field_len = LITLEN("wifi_ssid=");
  543. int pwd_field_len = LITLEN("wifi_password=");
  544. char *name_str_start = name_str + name_field_len;
  545. char *pwd_str_start = pwd_str + pwd_field_len;
  546. int name_str_len = enduser_setup_srch_str(name_str_start, "& ");
  547. int pwd_str_len = enduser_setup_srch_str(pwd_str_start, "& ");
  548. if (name_str_len == -1 || pwd_str_len == -1)
  549. {
  550. ENDUSER_SETUP_DEBUG("Password or SSID HTTP paramter divider not found");
  551. return 1;
  552. }
  553. struct station_config *cnf = luaM_malloc(lua_getstate(), sizeof(struct station_config));
  554. c_memset(cnf, 0, sizeof(struct station_config));
  555. int err;
  556. err = enduser_setup_http_urldecode(cnf->ssid, name_str_start, name_str_len, sizeof(cnf->ssid));
  557. err |= enduser_setup_http_urldecode(cnf->password, pwd_str_start, pwd_str_len, sizeof(cnf->password));
  558. if (err != 0 || c_strlen(cnf->ssid) == 0)
  559. {
  560. ENDUSER_SETUP_DEBUG("Unable to decode HTTP parameter to valid password or SSID");
  561. return 1;
  562. }
  563. ENDUSER_SETUP_DEBUG("");
  564. ENDUSER_SETUP_DEBUG("WiFi Credentials Stored");
  565. ENDUSER_SETUP_DEBUG("-----------------------");
  566. ENDUSER_SETUP_DEBUG("name: ");
  567. ENDUSER_SETUP_DEBUG(cnf->ssid);
  568. ENDUSER_SETUP_DEBUG("pass: ");
  569. ENDUSER_SETUP_DEBUG(cnf->password);
  570. ENDUSER_SETUP_DEBUG("-----------------------");
  571. ENDUSER_SETUP_DEBUG("");
  572. task_post_medium(do_station_cfg_handle, (task_param_t) cnf);
  573. return 0;
  574. }
  575. /**
  576. * Serve HTML
  577. *
  578. * @return - return 0 iff html was served successfully
  579. */
  580. static int enduser_setup_http_serve_header(struct tcp_pcb *http_client, const char *header, uint32_t header_len)
  581. {
  582. ENDUSER_SETUP_DEBUG("enduser_setup_http_serve_header");
  583. err_t err = tcp_write (http_client, header, header_len, TCP_WRITE_FLAG_COPY);
  584. if (err != ERR_OK)
  585. {
  586. deferred_close (http_client);
  587. ENDUSER_SETUP_ERROR("http_serve_header failed on tcp_write", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_NONFATAL);
  588. }
  589. return 0;
  590. }
  591. static err_t streamout_sent (void *arg, struct tcp_pcb *pcb, u16_t len)
  592. {
  593. ENDUSER_SETUP_DEBUG("streamout_sent");
  594. (void)len;
  595. unsigned offs = (unsigned)arg;
  596. if (!state || !state->http_payload_data)
  597. {
  598. tcp_abort (pcb);
  599. return ERR_ABRT;
  600. }
  601. unsigned wanted_len = state->http_payload_len - offs;
  602. unsigned buf_free = tcp_sndbuf (pcb);
  603. if (buf_free < wanted_len)
  604. wanted_len = buf_free;
  605. /* no-copy write */
  606. err_t err = tcp_write (pcb, state->http_payload_data + offs, wanted_len, 0);
  607. if (err != ERR_OK)
  608. {
  609. ENDUSER_SETUP_DEBUG("streaming out html failed");
  610. tcp_abort (pcb);
  611. return ERR_ABRT;
  612. }
  613. offs += wanted_len;
  614. if (offs >= state->http_payload_len)
  615. {
  616. tcp_sent (pcb, 0);
  617. deferred_close (pcb);
  618. }
  619. else
  620. tcp_arg (pcb, (void *)offs);
  621. return ERR_OK;
  622. }
  623. /**
  624. * Serve HTML
  625. *
  626. * @return - return 0 iff html was served successfully
  627. */
  628. static int enduser_setup_http_serve_html(struct tcp_pcb *http_client)
  629. {
  630. ENDUSER_SETUP_DEBUG("enduser_setup_http_serve_html");
  631. if (state->http_payload_data == NULL)
  632. {
  633. enduser_setup_http_load_payload();
  634. }
  635. unsigned chunklen = tcp_sndbuf (http_client);
  636. tcp_arg (http_client, (void *)chunklen);
  637. tcp_recv (http_client, 0); /* avoid confusion about the tcp_arg */
  638. tcp_sent (http_client, streamout_sent);
  639. /* Begin the no-copy stream-out here */
  640. err_t err = tcp_write (http_client, state->http_payload_data, chunklen, 0);
  641. if (err != 0)
  642. {
  643. ENDUSER_SETUP_ERROR("http_serve_html failed. tcp_write failed", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_NONFATAL);
  644. }
  645. return 0;
  646. }
  647. static void enduser_setup_serve_status(struct tcp_pcb *conn)
  648. {
  649. ENDUSER_SETUP_DEBUG("enduser_setup_serve_status");
  650. const char fmt[] =
  651. "HTTP/1.1 200 OK\r\n"
  652. "Cache-control:no-cache\r\n"
  653. "Connection:close\r\n"
  654. "Access-Control-Allow-Origin: *\r\n"
  655. "Content-type:text/plain\r\n"
  656. "Content-length: %d\r\n"
  657. "\r\n"
  658. "%s";
  659. const char *states[] =
  660. {
  661. "Idle.",
  662. "Connecting to \"%s\".",
  663. "Failed to connect to \"%s\" - Wrong password.",
  664. "Failed to connect to \"%s\" - Network not found.",
  665. "Failed to connect.",
  666. "Connected to \"%s\" (%s)."
  667. };
  668. const size_t num_states = sizeof(states)/sizeof(states[0]);
  669. uint8_t curr_state = state->lastStationStatus > 0 ? state->lastStationStatus : wifi_station_get_connect_status ();
  670. if (curr_state < num_states)
  671. {
  672. switch (curr_state)
  673. {
  674. case STATION_CONNECTING:
  675. case STATION_WRONG_PASSWORD:
  676. case STATION_NO_AP_FOUND:
  677. case STATION_GOT_IP:
  678. {
  679. const char *s = states[curr_state];
  680. struct station_config config;
  681. wifi_station_get_config(&config);
  682. config.ssid[31] = '\0';
  683. struct ip_info ip_info;
  684. wifi_get_ip_info(STATION_IF , &ip_info);
  685. char ip_addr[16];
  686. ip_addr[0] = '\0';
  687. if (curr_state == STATION_GOT_IP)
  688. {
  689. c_sprintf (ip_addr, "%d.%d.%d.%d", IP2STR(&ip_info.ip.addr));
  690. }
  691. int state_len = c_strlen(s);
  692. int ip_len = c_strlen(ip_addr);
  693. int ssid_len = c_strlen(config.ssid);
  694. int status_len = state_len + ssid_len + ip_len + 1;
  695. char status_buf[status_len];
  696. memset(status_buf, 0, status_len);
  697. status_len = c_sprintf(status_buf, s, config.ssid, ip_addr);
  698. int buf_len = sizeof(fmt) + status_len + 10; /* 10 = (9+1), 1 byte is '\0' and 9 are reserved for length field */
  699. char buf[buf_len];
  700. memset(buf, 0, buf_len);
  701. int output_len = c_sprintf(buf, fmt, status_len, status_buf);
  702. enduser_setup_http_serve_header(conn, buf, output_len);
  703. }
  704. break;
  705. /* Handle non-formatted strings */
  706. default:
  707. {
  708. const char *s = states[curr_state];
  709. int status_len = c_strlen(s);
  710. int buf_len = sizeof(fmt) + status_len + 10; /* 10 = (9+1), 1 byte is '\0' and 9 are reserved for length field */
  711. char buf[buf_len];
  712. memset(buf, 0, buf_len);
  713. int output_len = c_sprintf(buf, fmt, status_len, s);
  714. enduser_setup_http_serve_header(conn, buf, output_len);
  715. }
  716. break;
  717. }
  718. }
  719. else
  720. {
  721. enduser_setup_http_serve_header(conn, http_header_500, LITLEN(http_header_500));
  722. }
  723. }
  724. static void enduser_setup_serve_status_as_json (struct tcp_pcb *http_client)
  725. {
  726. ENDUSER_SETUP_DEBUG("enduser_setup_serve_status_as_json");
  727. /* If the station is currently shut down because of wi-fi channel issue, use the cached status */
  728. uint8_t curr_status = state->lastStationStatus > 0 ? state->lastStationStatus : wifi_station_get_connect_status ();
  729. char json_payload[64];
  730. c_sprintf(json_payload, "{\"deviceid\":\"%06X\", \"status\":%d}", system_get_chip_id(), curr_status);
  731. const char fmt[] =
  732. "HTTP/1.1 200 OK\r\n"
  733. "Cache-Control: no-cache\r\n"
  734. "Connection: close\r\n"
  735. "Access-Control-Allow-Origin: *\r\n"
  736. "Content-Type: application/json\r\n"
  737. "Content-Length: %d\r\n"
  738. "\r\n"
  739. "%s";
  740. int len = c_strlen(json_payload);
  741. char buf[c_strlen(fmt) + NUMLEN(len) + len - 4];
  742. len = c_sprintf (buf, fmt, len, json_payload);
  743. enduser_setup_http_serve_header (http_client, buf, len);
  744. }
  745. static void enduser_setup_handle_OPTIONS (struct tcp_pcb *http_client, char *data, unsigned short data_len)
  746. {
  747. ENDUSER_SETUP_DEBUG("enduser_setup_handle_OPTIONS");
  748. const char json[] =
  749. "HTTP/1.1 200 OK\r\n"
  750. "Cache-Control: no-cache\r\n"
  751. "Connection: close\r\n"
  752. "Content-Type: application/json\r\n"
  753. "Content-Length: 0\r\n"
  754. "Access-Control-Allow-Origin: *\r\n"
  755. "Access-Control-Allow-Methods: GET\r\n"
  756. "Access-Control-Allow-Age: 300\r\n"
  757. "\r\n";
  758. const char others[] =
  759. "HTTP/1.1 200 OK\r\n"
  760. "Cache-Control: no-cache\r\n"
  761. "Connection: close\r\n"
  762. "Content-Length: 0\r\n"
  763. "\r\n";
  764. int type = 0;
  765. if (c_strncmp(data, "GET ", 4) == 0)
  766. {
  767. if (c_strncmp(data + 4, "/aplist", 7) == 0 || c_strncmp(data + 4, "/setwifi?", 9) == 0 || c_strncmp(data + 4, "/status.json", 12) == 0)
  768. {
  769. enduser_setup_http_serve_header (http_client, json, c_strlen(json));
  770. return;
  771. }
  772. }
  773. enduser_setup_http_serve_header (http_client, others, c_strlen(others));
  774. return;
  775. }
  776. /* --- WiFi AP scanning support -------------------------------------------- */
  777. static void free_scan_listeners (void)
  778. {
  779. ENDUSER_SETUP_DEBUG("free_scan_listeners");
  780. if (!state || !state->scan_listeners)
  781. {
  782. return;
  783. }
  784. scan_listener_t *l = state->scan_listeners , *next = 0;
  785. while (l)
  786. {
  787. next = l->next;
  788. c_free (l);
  789. l = next;
  790. }
  791. state->scan_listeners = 0;
  792. }
  793. static void remove_scan_listener (scan_listener_t *l)
  794. {
  795. ENDUSER_SETUP_DEBUG("remove_scan_listener");
  796. if (state)
  797. {
  798. scan_listener_t **sl = &state->scan_listeners;
  799. while (*sl)
  800. {
  801. /* Remove any and all references to the closed conn from the scan list */
  802. if (*sl == l)
  803. {
  804. *sl = l->next;
  805. c_free (l);
  806. /* No early exit to guard against multi-entry on list */
  807. }
  808. else
  809. sl = &(*sl)->next;
  810. }
  811. }
  812. }
  813. static char *escape_ssid (char *dst, const char *src)
  814. {
  815. for (int i = 0; i < 32 && src[i]; ++i)
  816. {
  817. if (src[i] == '\\' || src[i] == '"')
  818. {
  819. *dst++ = '\\';
  820. }
  821. *dst++ = src[i];
  822. }
  823. return dst;
  824. }
  825. static void notify_scan_listeners (const char *payload, size_t sz)
  826. {
  827. ENDUSER_SETUP_DEBUG("notify_scan_listeners");
  828. if (!state)
  829. {
  830. return;
  831. }
  832. for (scan_listener_t *l = state->scan_listeners; l; l = l->next)
  833. {
  834. if (tcp_write (l->conn, payload, sz, TCP_WRITE_FLAG_COPY) != ERR_OK)
  835. {
  836. ENDUSER_SETUP_DEBUG("failed to send wifi list");
  837. tcp_abort (l->conn);
  838. }
  839. else
  840. tcp_sent (l->conn, close_once_sent); /* TODO: time-out sends? */
  841. l->conn = 0;
  842. }
  843. free_scan_listeners ();
  844. }
  845. static void on_scan_done (void *arg, STATUS status)
  846. {
  847. ENDUSER_SETUP_DEBUG("on_scan_done");
  848. if (!state || !state->scan_listeners)
  849. {
  850. return;
  851. }
  852. if (status == OK)
  853. {
  854. unsigned num_nets = 0;
  855. for (struct bss_info *wn = arg; wn; wn = wn->next.stqe_next)
  856. {
  857. ++num_nets;
  858. }
  859. const char header_fmt[] =
  860. "HTTP/1.1 200 OK\r\n"
  861. "Connection:close\r\n"
  862. "Cache-control:no-cache\r\n"
  863. "Access-Control-Allow-Origin: *\r\n"
  864. "Content-type:application/json\r\n"
  865. "Content-length:%4d\r\n"
  866. "\r\n";
  867. const size_t hdr_sz = sizeof (header_fmt) +1 -1; /* +expand %4d, -\0 */
  868. /* To be able to safely escape a pathological SSID, we need 2*32 bytes */
  869. const size_t max_entry_sz = 27 + 2*32 + 6; /* {"ssid":"","rssi":,"chan":} */
  870. const size_t alloc_sz = hdr_sz + num_nets * max_entry_sz + 3;
  871. char *http = os_zalloc (alloc_sz);
  872. if (!http)
  873. {
  874. goto serve_500;
  875. }
  876. char *p = http + hdr_sz; /* start body where we know it will be */
  877. /* p[0] will be clobbered when we print the header, so fill it in last */
  878. ++p;
  879. for (struct bss_info *wn = arg; wn; wn = wn->next.stqe_next)
  880. {
  881. if (wn != arg)
  882. {
  883. *p++ = ',';
  884. }
  885. const char entry_start[] = "{\"ssid\":\"";
  886. strcpy (p, entry_start);
  887. p += sizeof (entry_start) -1;
  888. p = escape_ssid (p, wn->ssid);
  889. const char entry_mid[] = "\",\"rssi\":";
  890. strcpy (p, entry_mid);
  891. p += sizeof (entry_mid) -1;
  892. p += c_sprintf (p, "%d", wn->rssi);
  893. const char entry_chan[] = ",\"chan\":";
  894. strcpy (p, entry_chan);
  895. p += sizeof (entry_chan) -1;
  896. p += c_sprintf (p, "%d", wn->channel);
  897. *p++ = '}';
  898. }
  899. *p++ = ']';
  900. size_t body_sz = (p - http) - hdr_sz;
  901. c_sprintf (http, header_fmt, body_sz);
  902. http[hdr_sz] = '['; /* Rewrite the \0 with the correct start of body */
  903. notify_scan_listeners (http, hdr_sz + body_sz);
  904. ENDUSER_SETUP_DEBUG(http + hdr_sz);
  905. c_free (http);
  906. return;
  907. }
  908. serve_500:
  909. notify_scan_listeners (http_header_500, LITLEN(http_header_500));
  910. }
  911. /* ---- end WiFi AP scan support ------------------------------------------- */
  912. static err_t enduser_setup_http_recvcb(void *arg, struct tcp_pcb *http_client, struct pbuf *p, err_t err)
  913. {
  914. ENDUSER_SETUP_DEBUG("enduser_setup_http_recvcb");
  915. if (!state || err != ERR_OK)
  916. {
  917. if (!state)
  918. ENDUSER_SETUP_DEBUG("ignoring received data while stopped");
  919. tcp_abort (http_client);
  920. return ERR_ABRT;
  921. }
  922. if (!p) /* remote side closed, close our end too */
  923. {
  924. ENDUSER_SETUP_DEBUG("connection closed");
  925. scan_listener_t *l = arg; /* if it's waiting for scan, we have a ptr here */
  926. if (l)
  927. remove_scan_listener (l);
  928. deferred_close (http_client);
  929. return ERR_OK;
  930. }
  931. char *data = os_zalloc (p->tot_len + 1);
  932. if (!data)
  933. return ERR_MEM;
  934. unsigned data_len = pbuf_copy_partial (p, data, p->tot_len, 0);
  935. tcp_recved (http_client, p->tot_len);
  936. pbuf_free (p);
  937. err_t ret = ERR_OK;
  938. #if ENDUSER_SETUP_DEBUG_SHOW_HTTP_REQUEST
  939. ENDUSER_SETUP_DEBUG(data);
  940. #endif
  941. if (c_strncmp(data, "GET ", 4) == 0)
  942. {
  943. if (c_strncmp(data + 4, "/ ", 2) == 0)
  944. {
  945. if (enduser_setup_http_serve_html(http_client) != 0)
  946. {
  947. ENDUSER_SETUP_ERROR("http_recvcb failed. Unable to send HTML.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_NONFATAL);
  948. }
  949. else
  950. {
  951. goto free_out; /* streaming now in progress */
  952. }
  953. }
  954. else if (c_strncmp(data + 4, "/aplist", 7) == 0)
  955. {
  956. /* Don't do an AP Scan while station is trying to connect to Wi-Fi */
  957. if (state->connecting == 0)
  958. {
  959. scan_listener_t *l = os_malloc (sizeof (scan_listener_t));
  960. if (!l)
  961. {
  962. ENDUSER_SETUP_ERROR("out of memory", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_NONFATAL);
  963. }
  964. bool already = (state->scan_listeners != NULL);
  965. tcp_arg (http_client, l);
  966. /* TODO: check if also need a tcp_err() cb, or if recv() is enough */
  967. l->conn = http_client;
  968. l->next = state->scan_listeners;
  969. state->scan_listeners = l;
  970. if (!already)
  971. {
  972. if (!wifi_station_scan(NULL, on_scan_done))
  973. {
  974. enduser_setup_http_serve_header(http_client, http_header_500, LITLEN(http_header_500));
  975. deferred_close (l->conn);
  976. l->conn = 0;
  977. free_scan_listeners();
  978. }
  979. }
  980. goto free_out; /* request queued */
  981. }
  982. else
  983. {
  984. /* Return No Content status to the caller */
  985. enduser_setup_http_serve_header(http_client, http_header_204, LITLEN(http_header_204));
  986. }
  987. }
  988. else if (c_strncmp(data + 4, "/status.json", 12) == 0)
  989. {
  990. enduser_setup_serve_status_as_json(http_client);
  991. }
  992. else if (c_strncmp(data + 4, "/status", 7) == 0)
  993. {
  994. enduser_setup_serve_status(http_client);
  995. }
  996. else if (c_strncmp(data + 4, "/update?", 8) == 0)
  997. {
  998. switch (enduser_setup_http_handle_credentials(data, data_len))
  999. {
  1000. case 0:
  1001. enduser_setup_http_serve_header(http_client, http_header_302, LITLEN(http_header_302));
  1002. break;
  1003. case 1:
  1004. enduser_setup_http_serve_header(http_client, http_header_400, LITLEN(http_header_400));
  1005. break;
  1006. default:
  1007. ENDUSER_SETUP_ERROR("http_recvcb failed. Failed to handle wifi credentials.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_NONFATAL);
  1008. break;
  1009. }
  1010. }
  1011. else if (c_strncmp(data + 4, "/setwifi?", 9) == 0)
  1012. {
  1013. switch (enduser_setup_http_handle_credentials(data, data_len))
  1014. {
  1015. case 0:
  1016. enduser_setup_serve_status_as_json(http_client);
  1017. break;
  1018. case 1:
  1019. enduser_setup_http_serve_header(http_client, http_header_400, LITLEN(http_header_400));
  1020. break;
  1021. default:
  1022. ENDUSER_SETUP_ERROR("http_recvcb failed. Failed to handle wifi credentials.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_NONFATAL);
  1023. break;
  1024. }
  1025. }
  1026. else if (c_strncmp(data + 4, "/generate_204", 13) == 0)
  1027. {
  1028. /* Convince Android devices that they have internet access to avoid pesky dialogues. */
  1029. enduser_setup_http_serve_header(http_client, http_header_204, LITLEN(http_header_204));
  1030. }
  1031. else
  1032. {
  1033. ENDUSER_SETUP_DEBUG("serving 404");
  1034. enduser_setup_http_serve_header(http_client, http_header_404, LITLEN(http_header_404));
  1035. }
  1036. }
  1037. else if (c_strncmp(data, "OPTIONS ", 8) == 0)
  1038. {
  1039. enduser_setup_handle_OPTIONS(http_client, data, data_len);
  1040. }
  1041. else /* not GET or OPTIONS */
  1042. {
  1043. enduser_setup_http_serve_header(http_client, http_header_405, LITLEN(http_header_405));
  1044. }
  1045. deferred_close (http_client);
  1046. free_out:
  1047. os_free (data);
  1048. return ret;
  1049. }
  1050. static err_t enduser_setup_http_connectcb(void *arg, struct tcp_pcb *pcb, err_t err)
  1051. {
  1052. ENDUSER_SETUP_DEBUG("enduser_setup_http_connectcb");
  1053. if (!state)
  1054. {
  1055. ENDUSER_SETUP_DEBUG("connect callback but no state?!");
  1056. tcp_abort (pcb);
  1057. return ERR_ABRT;
  1058. }
  1059. tcp_accepted (state->http_pcb);
  1060. tcp_recv (pcb, enduser_setup_http_recvcb);
  1061. tcp_nagle_disable (pcb);
  1062. return ERR_OK;
  1063. }
  1064. static int enduser_setup_http_start(void)
  1065. {
  1066. ENDUSER_SETUP_DEBUG("enduser_setup_http_start");
  1067. struct tcp_pcb *pcb = tcp_new ();
  1068. if (pcb == NULL)
  1069. {
  1070. ENDUSER_SETUP_ERROR("http_start failed. Memory allocation failed (http_pcb == NULL).", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_FATAL);
  1071. }
  1072. if (tcp_bind (pcb, IP_ADDR_ANY, 80) != ERR_OK)
  1073. {
  1074. ENDUSER_SETUP_ERROR("http_start bind failed", ENDUSER_SETUP_ERR_SOCKET_ALREADY_OPEN, ENDUSER_SETUP_ERR_FATAL);
  1075. }
  1076. state->http_pcb = tcp_listen (pcb);
  1077. if (!state->http_pcb)
  1078. {
  1079. tcp_abort(pcb); /* original wasn't freed for us */
  1080. ENDUSER_SETUP_ERROR("http_start listen failed", ENDUSER_SETUP_ERR_SOCKET_ALREADY_OPEN, ENDUSER_SETUP_ERR_FATAL);
  1081. }
  1082. tcp_accept (state->http_pcb, enduser_setup_http_connectcb);
  1083. /* TODO: check lwip tcp timeouts */
  1084. #if 0
  1085. err = espconn_regist_time(state->espconn_http_tcp, 2, 0);
  1086. if (err == ESPCONN_ARG)
  1087. {
  1088. ENDUSER_SETUP_ERROR("http_start failed. Unable to set TCP timeout.", ENDUSER_SETUP_ERR_CONNECTION_NOT_FOUND, ENDUSER_SETUP_ERR_NONFATAL | ENDUSER_SETUP_ERR_NO_RETURN);
  1089. }
  1090. #endif
  1091. int err = enduser_setup_http_load_payload();
  1092. if (err == 1)
  1093. {
  1094. ENDUSER_SETUP_DEBUG("enduser_setup_http_start info. Loaded backup HTML.");
  1095. }
  1096. else if (err == 2)
  1097. {
  1098. ENDUSER_SETUP_ERROR("http_start failed. Unable to allocate memory for HTTP payload.", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_FATAL);
  1099. }
  1100. return 0;
  1101. }
  1102. static void enduser_setup_http_stop(void)
  1103. {
  1104. ENDUSER_SETUP_DEBUG("enduser_setup_http_stop");
  1105. if (state && state->http_pcb)
  1106. {
  1107. tcp_close (state->http_pcb); /* cannot fail for listening sockets */
  1108. state->http_pcb = 0;
  1109. }
  1110. }
  1111. static void enduser_setup_ap_stop(void)
  1112. {
  1113. ENDUSER_SETUP_DEBUG("enduser_setup_ap_stop");
  1114. wifi_set_opmode(~SOFTAP_MODE & wifi_get_opmode());
  1115. }
  1116. static void enduser_setup_ap_start(void)
  1117. {
  1118. ENDUSER_SETUP_DEBUG("enduser_setup_ap_start");
  1119. struct softap_config cnf;
  1120. c_memset(&(cnf), 0, sizeof(struct softap_config));
  1121. #ifndef ENDUSER_SETUP_AP_SSID
  1122. #define ENDUSER_SETUP_AP_SSID "SetupGadget"
  1123. #endif
  1124. char ssid[] = ENDUSER_SETUP_AP_SSID;
  1125. int ssid_name_len = c_strlen(ssid);
  1126. c_memcpy(&(cnf.ssid), ssid, ssid_name_len);
  1127. uint8_t mac[6];
  1128. wifi_get_macaddr(SOFTAP_IF, mac);
  1129. cnf.ssid[ssid_name_len] = '_';
  1130. c_sprintf(cnf.ssid + ssid_name_len + 1, "%02X%02X%02X", mac[3], mac[4], mac[5]);
  1131. cnf.ssid_len = ssid_name_len + 7;
  1132. cnf.channel = state == NULL? 1 : state->softAPchannel;
  1133. cnf.authmode = AUTH_OPEN;
  1134. cnf.ssid_hidden = 0;
  1135. cnf.max_connection = 5;
  1136. cnf.beacon_interval = 100;
  1137. wifi_set_opmode(STATIONAP_MODE);
  1138. wifi_softap_set_config(&cnf);
  1139. #if ENDUSER_SETUP_DEBUG_ENABLE
  1140. char debuginfo[100];
  1141. c_sprintf(debuginfo, "SSID: %s, CHAN: %d", cnf.ssid, cnf.channel);
  1142. ENDUSER_SETUP_DEBUG(debuginfo);
  1143. #endif
  1144. }
  1145. static void on_initial_scan_done (void *arg, STATUS status)
  1146. {
  1147. ENDUSER_SETUP_DEBUG("on_initial_scan_done");
  1148. if (state == NULL)
  1149. {
  1150. return;
  1151. }
  1152. int8_t rssi = -100;
  1153. if (status == OK)
  1154. {
  1155. /* Find the strongest signal and use the same wi-fi channel for the SoftAP. This is based on an assumption that end-user
  1156. * will likely be choosing that AP to connect to. Since ESP only has one radio, STA and AP must share same channel. This
  1157. * algorithm tries to minimize the SoftAP unavailability when the STA is connecting to verify. If the STA must switch to
  1158. * another wi-fi channel, then the SoftAP will follow it, but the end-user's device will not know that the SoftAP is no
  1159. * longer there until it times out. To mitigate, we try to prevent the need to switch channels, and if a switch does occur,
  1160. * be quick about returning to this channel so that status info can be delivered to the end-user's device before shutting
  1161. * down EUS.
  1162. */
  1163. for (struct bss_info *wn = arg; wn; wn = wn->next.stqe_next)
  1164. {
  1165. if (wn->rssi > rssi)
  1166. {
  1167. state->softAPchannel = wn->channel;
  1168. rssi = wn->rssi;
  1169. }
  1170. }
  1171. }
  1172. enduser_setup_ap_start();
  1173. enduser_setup_check_station_start();
  1174. }
  1175. static void enduser_setup_dns_recv_callback(void *arg, char *recv_data, unsigned short recv_len)
  1176. {
  1177. ENDUSER_SETUP_DEBUG("enduser_setup_dns_recv_callback.");
  1178. struct espconn *callback_espconn = arg;
  1179. struct ip_info ip_info;
  1180. uint32_t qname_len = c_strlen(&(recv_data[12])) + 1; /* \0=1byte */
  1181. uint32_t dns_reply_static_len = (uint32_t) sizeof(dns_header) + (uint32_t) sizeof(dns_body) + 2 + 4; /* dns_id=2bytes, ip=4bytes */
  1182. uint32_t dns_reply_len = dns_reply_static_len + qname_len;
  1183. #if ENDUSER_SETUP_DEBUG_ENABLE
  1184. char *qname = c_malloc(qname_len + 12);
  1185. if (qname != NULL)
  1186. {
  1187. c_sprintf(qname, "DNS QUERY = %s", &(recv_data[12]));
  1188. uint32_t p;
  1189. int i, j;
  1190. for(i=12;i<(int)strlen(qname);i++)
  1191. {
  1192. p=qname[i];
  1193. for(j=0;j<(int)p;j++)
  1194. {
  1195. qname[i]=qname[i+1];
  1196. i=i+1;
  1197. }
  1198. qname[i]='.';
  1199. }
  1200. qname[i-1]='\0';
  1201. ENDUSER_SETUP_DEBUG(qname);
  1202. c_free(qname);
  1203. }
  1204. #endif
  1205. uint8_t if_mode = wifi_get_opmode();
  1206. if ((if_mode & SOFTAP_MODE) == 0)
  1207. {
  1208. ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. Interface mode not supported.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_FATAL);
  1209. }
  1210. uint8_t if_index = (if_mode == STATION_MODE? STATION_IF : SOFTAP_IF);
  1211. if (wifi_get_ip_info(if_index , &ip_info) == false)
  1212. {
  1213. ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. Unable to get interface IP.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_FATAL);
  1214. }
  1215. char *dns_reply = (char *) c_malloc(dns_reply_len);
  1216. if (dns_reply == NULL)
  1217. {
  1218. ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. Failed to allocate memory.", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_NONFATAL);
  1219. }
  1220. uint32_t insert_byte = 0;
  1221. c_memcpy(&(dns_reply[insert_byte]), recv_data, 2);
  1222. insert_byte += 2;
  1223. c_memcpy(&(dns_reply[insert_byte]), dns_header, sizeof(dns_header));
  1224. insert_byte += (uint32_t) sizeof(dns_header);
  1225. c_memcpy(&(dns_reply[insert_byte]), &(recv_data[12]), qname_len);
  1226. insert_byte += qname_len;
  1227. c_memcpy(&(dns_reply[insert_byte]), dns_body, sizeof(dns_body));
  1228. insert_byte += (uint32_t) sizeof(dns_body);
  1229. c_memcpy(&(dns_reply[insert_byte]), &(ip_info.ip), 4);
  1230. /* SDK 1.4.0 changed behaviour, for UDP server need to look up remote ip/port */
  1231. remot_info *pr = 0;
  1232. if (espconn_get_connection_info(callback_espconn, &pr, 0) != ESPCONN_OK)
  1233. {
  1234. ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. Unable to get IP of UDP sender.", ENDUSER_SETUP_ERR_CONNECTION_NOT_FOUND, ENDUSER_SETUP_ERR_FATAL);
  1235. }
  1236. callback_espconn->proto.udp->remote_port = pr->remote_port;
  1237. os_memmove(callback_espconn->proto.udp->remote_ip, pr->remote_ip, 4);
  1238. int8_t err;
  1239. err = espconn_send(callback_espconn, dns_reply, dns_reply_len);
  1240. c_free(dns_reply);
  1241. if (err == ESPCONN_MEM)
  1242. {
  1243. ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. Failed to allocate memory for send.", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_FATAL);
  1244. }
  1245. else if (err == ESPCONN_ARG)
  1246. {
  1247. ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. Can't execute transmission.", ENDUSER_SETUP_ERR_CONNECTION_NOT_FOUND, ENDUSER_SETUP_ERR_FATAL);
  1248. }
  1249. else if (err == ESPCONN_MAXNUM)
  1250. {
  1251. ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. Buffer full. Discarding...", ENDUSER_SETUP_ERR_MAX_NUMBER, ENDUSER_SETUP_ERR_NONFATAL);
  1252. }
  1253. else if (err == ESPCONN_IF)
  1254. {
  1255. ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. Send UDP data failed", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_NONFATAL);
  1256. }
  1257. else if (err != 0)
  1258. {
  1259. ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. espconn_send failed", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_FATAL);
  1260. }
  1261. }
  1262. static void enduser_setup_free(void)
  1263. {
  1264. ENDUSER_SETUP_DEBUG("enduser_setup_free");
  1265. if (state == NULL)
  1266. {
  1267. return;
  1268. }
  1269. /* Make sure no running timers are left. */
  1270. os_timer_disarm(&(state->check_station_timer));
  1271. os_timer_disarm(&(state->shutdown_timer));
  1272. if (state->espconn_dns_udp != NULL)
  1273. {
  1274. if (state->espconn_dns_udp->proto.udp != NULL)
  1275. {
  1276. c_free(state->espconn_dns_udp->proto.udp);
  1277. }
  1278. c_free(state->espconn_dns_udp);
  1279. }
  1280. c_free(state->http_payload_data);
  1281. free_scan_listeners ();
  1282. c_free(state);
  1283. state = NULL;
  1284. }
  1285. static int enduser_setup_dns_start(void)
  1286. {
  1287. ENDUSER_SETUP_DEBUG("enduser_setup_dns_start");
  1288. if (state->espconn_dns_udp != NULL)
  1289. {
  1290. ENDUSER_SETUP_ERROR("dns_start failed. Appears to already be started (espconn_dns_udp != NULL).", ENDUSER_SETUP_ERR_ALREADY_INITIALIZED, ENDUSER_SETUP_ERR_FATAL);
  1291. }
  1292. state->espconn_dns_udp = (struct espconn *) c_malloc(sizeof(struct espconn));
  1293. if (state->espconn_dns_udp == NULL)
  1294. {
  1295. ENDUSER_SETUP_ERROR("dns_start failed. Memory allocation failed (espconn_dns_udp == NULL).", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_FATAL);
  1296. }
  1297. esp_udp *esp_udp_data = (esp_udp *) c_malloc(sizeof(esp_udp));
  1298. if (esp_udp_data == NULL)
  1299. {
  1300. ENDUSER_SETUP_ERROR("dns_start failed. Memory allocation failed (esp_udp == NULL).", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_FATAL);
  1301. }
  1302. c_memset(state->espconn_dns_udp, 0, sizeof(struct espconn));
  1303. c_memset(esp_udp_data, 0, sizeof(esp_udp));
  1304. state->espconn_dns_udp->proto.udp = esp_udp_data;
  1305. state->espconn_dns_udp->type = ESPCONN_UDP;
  1306. state->espconn_dns_udp->state = ESPCONN_NONE;
  1307. esp_udp_data->local_port = 53;
  1308. int8_t err;
  1309. err = espconn_regist_recvcb(state->espconn_dns_udp, enduser_setup_dns_recv_callback);
  1310. if (err != 0)
  1311. {
  1312. ENDUSER_SETUP_ERROR("dns_start failed. Couldn't add receive callback, unknown error.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_FATAL);
  1313. }
  1314. err = espconn_create(state->espconn_dns_udp);
  1315. if (err == ESPCONN_ISCONN)
  1316. {
  1317. ENDUSER_SETUP_ERROR("dns_start failed. Couldn't create connection, already listening for that connection.", ENDUSER_SETUP_ERR_SOCKET_ALREADY_OPEN, ENDUSER_SETUP_ERR_FATAL);
  1318. }
  1319. else if (err == ESPCONN_MEM)
  1320. {
  1321. ENDUSER_SETUP_ERROR("dns_start failed. Couldn't create connection, out of memory.", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_FATAL);
  1322. }
  1323. else if (err != 0)
  1324. {
  1325. ENDUSER_SETUP_ERROR("dns_start failed. Couldn't create connection, unknown error.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_FATAL);
  1326. }
  1327. return 0;
  1328. }
  1329. static void enduser_setup_dns_stop(void)
  1330. {
  1331. ENDUSER_SETUP_DEBUG("enduser_setup_dns_stop");
  1332. if (state != NULL && state->espconn_dns_udp != NULL)
  1333. {
  1334. espconn_delete(state->espconn_dns_udp);
  1335. }
  1336. }
  1337. static int enduser_setup_init(lua_State *L)
  1338. {
  1339. /* Note: Normal to not see this debug message on first invocation because debug callback is set below */
  1340. ENDUSER_SETUP_DEBUG("enduser_setup_init");
  1341. /* Defer errors until the bottom, so that callbacks can be set, if applicable, to handle debug and error messages */
  1342. int ret = 0;
  1343. if (state != NULL)
  1344. {
  1345. ret = ENDUSER_SETUP_ERR_ALREADY_INITIALIZED;
  1346. }
  1347. else
  1348. {
  1349. state = (enduser_setup_state_t *) os_zalloc(sizeof(enduser_setup_state_t));
  1350. if (state == NULL)
  1351. {
  1352. ret = ENDUSER_SETUP_ERR_OUT_OF_MEMORY;
  1353. }
  1354. else
  1355. {
  1356. c_memset(state, 0, sizeof(enduser_setup_state_t));
  1357. state->lua_connected_cb_ref = LUA_NOREF;
  1358. state->lua_err_cb_ref = LUA_NOREF;
  1359. state->lua_dbg_cb_ref = LUA_NOREF;
  1360. state->softAPchannel = 1;
  1361. state->success = 0;
  1362. state->callbackDone = 0;
  1363. state->lastStationStatus = 0;
  1364. state->connecting = 0;
  1365. }
  1366. }
  1367. if (!lua_isnoneornil(L, 1))
  1368. {
  1369. lua_pushvalue(L, 1);
  1370. state->lua_connected_cb_ref = luaL_ref(L, LUA_REGISTRYINDEX);
  1371. }
  1372. if (!lua_isnoneornil(L, 2))
  1373. {
  1374. lua_pushvalue (L, 2);
  1375. state->lua_err_cb_ref = luaL_ref(L, LUA_REGISTRYINDEX);
  1376. }
  1377. if (!lua_isnoneornil(L, 3))
  1378. {
  1379. lua_pushvalue (L, 3);
  1380. state->lua_dbg_cb_ref = luaL_ref(L, LUA_REGISTRYINDEX);
  1381. ENDUSER_SETUP_DEBUG("enduser_setup_init: Debug callback has been set");
  1382. }
  1383. if (ret == ENDUSER_SETUP_ERR_ALREADY_INITIALIZED)
  1384. {
  1385. ENDUSER_SETUP_ERROR("init failed. Appears to already be started. EUS will shut down now.", ENDUSER_SETUP_ERR_ALREADY_INITIALIZED, ENDUSER_SETUP_ERR_FATAL);
  1386. }
  1387. else if (ret == ENDUSER_SETUP_ERR_OUT_OF_MEMORY)
  1388. {
  1389. ENDUSER_SETUP_ERROR("init failed. Unable to allocate memory.", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_FATAL);
  1390. }
  1391. return ret;
  1392. }
  1393. static int enduser_setup_manual(lua_State *L)
  1394. {
  1395. if (!lua_isnoneornil (L, 1))
  1396. {
  1397. manual = lua_toboolean (L, 1);
  1398. }
  1399. lua_pushboolean (L, manual);
  1400. return 1;
  1401. }
  1402. static int enduser_setup_start(lua_State *L)
  1403. {
  1404. /* Note: The debug callback is set in enduser_setup_init. It's normal to not see this debug message on first invocation. */
  1405. ENDUSER_SETUP_DEBUG("enduser_setup_start");
  1406. if (!do_station_cfg_handle)
  1407. {
  1408. do_station_cfg_handle = task_get_id(do_station_cfg);
  1409. }
  1410. if(enduser_setup_init(L))
  1411. {
  1412. goto failed;
  1413. }
  1414. if (!manual)
  1415. {
  1416. ENDUSER_SETUP_DEBUG("Performing AP Scan to identify likely AP's channel. Enabling Station if it wasn't already.");
  1417. wifi_set_opmode(STATION_MODE | wifi_get_opmode());
  1418. wifi_station_scan(NULL, on_initial_scan_done);
  1419. }
  1420. else
  1421. {
  1422. enduser_setup_check_station_start();
  1423. }
  1424. if(enduser_setup_dns_start())
  1425. {
  1426. goto failed;
  1427. }
  1428. if(enduser_setup_http_start())
  1429. {
  1430. goto failed;
  1431. }
  1432. goto out;
  1433. failed:
  1434. enduser_setup_stop(lua_getstate());
  1435. out:
  1436. return 0;
  1437. }
  1438. /**
  1439. * A wrapper needed for type-reasons strictness reasons.
  1440. */
  1441. static void enduser_setup_stop_callback(void *ptr)
  1442. {
  1443. enduser_setup_stop(lua_getstate());
  1444. }
  1445. static int enduser_setup_stop(lua_State* L)
  1446. {
  1447. ENDUSER_SETUP_DEBUG("enduser_setup_stop");
  1448. if (!manual)
  1449. {
  1450. enduser_setup_ap_stop();
  1451. }
  1452. if (state != NULL && state->success && !state->callbackDone)
  1453. {
  1454. wifi_set_opmode(STATION_MODE | wifi_get_opmode());
  1455. wifi_station_connect();
  1456. enduser_setup_connected_callback();
  1457. }
  1458. enduser_setup_dns_stop();
  1459. enduser_setup_http_stop();
  1460. enduser_setup_free();
  1461. return 0;
  1462. }
  1463. static const LUA_REG_TYPE enduser_setup_map[] = {
  1464. { LSTRKEY( "manual" ), LFUNCVAL( enduser_setup_manual )},
  1465. { LSTRKEY( "start" ), LFUNCVAL( enduser_setup_start )},
  1466. { LSTRKEY( "stop" ), LFUNCVAL( enduser_setup_stop )},
  1467. { LNILKEY, LNILVAL}
  1468. };
  1469. NODEMCU_MODULE(ENDUSER_SETUP, "enduser_setup", enduser_setup_map, NULL);