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- /*
- * Copyright 2015 Robert Foss. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * - Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the
- * distribution.
- * - Neither the name of the copyright holders nor the names of
- * its contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
- * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * @author Robert Foss <dev@robertfoss.se>
- *
- * Additions & fixes: Johny Mattsson <jmattsson@dius.com.au>
- * Jason Follas <jfollas@gmail.com>
- */
- #include "module.h"
- #include "lauxlib.h"
- #include "lmem.h"
- #include "platform.h"
- #include <stdlib.h>
- #include <stdio.h>
- #include <string.h>
- #include "ctype.h"
- #include "user_interface.h"
- #include "espconn.h"
- #include "lwip/tcp.h"
- #include "lwip/pbuf.h"
- #include "vfs.h"
- #include "task/task.h"
- /* Set this to 1 to generate debug messages. Uses debug callback provided by Lua. Example: enduser_setup.start(successFn, print, print) */
- #define ENDUSER_SETUP_DEBUG_ENABLE 0
- /* Set this to 1 to output the contents of HTTP requests when debugging. Useful if you need it, but can get pretty noisy */
- #define ENDUSER_SETUP_DEBUG_SHOW_HTTP_REQUEST 0
- #define MIN(x, y) (((x) < (y)) ? (x) : (y))
- #define LITLEN(strliteral) (sizeof (strliteral) -1)
- #define STRINGIFY(x) #x
- #define NUMLEN(x) (sizeof(STRINGIFY(x)) - 1)
- #define ENDUSER_SETUP_ERR_FATAL (1 << 0)
- #define ENDUSER_SETUP_ERR_NONFATAL (1 << 1)
- #define ENDUSER_SETUP_ERR_NO_RETURN (1 << 2)
- #define ENDUSER_SETUP_ERR_OUT_OF_MEMORY 1
- #define ENDUSER_SETUP_ERR_CONNECTION_NOT_FOUND 2
- #define ENDUSER_SETUP_ERR_UNKOWN_ERROR 3
- #define ENDUSER_SETUP_ERR_SOCKET_ALREADY_OPEN 4
- #define ENDUSER_SETUP_ERR_MAX_NUMBER 5
- #define ENDUSER_SETUP_ERR_ALREADY_INITIALIZED 6
- /**
- * DNS Response Packet:
- *
- * |DNS ID - 16 bits|
- * |dns_header|
- * |QNAME|
- * |dns_body|
- * |ip - 32 bits|
- *
- * DNS Header Part | FLAGS | | Q COUNT | | A CNT | |AUTH CNT| | ADD CNT| */
- static const char dns_header[] = { 0x80, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00 };
- /* DNS Query Part | Q TYPE | | Q CLASS| */
- static const char dns_body[] = { 0x00, 0x01, 0x00, 0x01,
- /* DNS Answer Part |LBL OFFS| | TYPE | | CLASS | | TTL | | RD LEN | */
- 0xC0, 0x0C, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x78, 0x00, 0x04 };
- static const char http_html_gz_filename[] = "enduser_setup.html.gz";
- static const char http_html_filename[] = "enduser_setup.html";
- 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! */
- static const char http_header_204[] = "HTTP/1.1 204 No Content\r\nContent-Length:0\r\nConnection:close\r\n\r\n";
- static const char http_header_302[] = "HTTP/1.1 302 Moved\r\nLocation: /\r\nContent-Length:0\r\nConnection:close\r\n\r\n";
- static const char http_header_302_trying[] = "HTTP/1.1 302 Moved\r\nLocation: /?trying=true\r\nContent-Length:0\r\nConnection:close\r\n\r\n";
- static const char http_header_400[] = "HTTP/1.1 400 Bad request\r\nContent-Length:0\r\nConnection:close\r\n\r\n";
- static const char http_header_404[] = "HTTP/1.1 404 Not found\r\nContent-Length:0\r\nConnection:close\r\n\r\n";
- static const char http_header_405[] = "HTTP/1.1 405 Method Not Allowed\r\nContent-Length:0\r\nConnection:close\r\n\r\n";
- static const char http_header_500[] = "HTTP/1.1 500 Internal Error\r\nContent-Length:0\r\nConnection:close\r\n\r\n";
- static const char http_header_content_len_fmt[] = "Content-length:%5d\r\n\r\n";
- static const char http_html_gzip_contentencoding[] = "Content-Encoding: gzip\r\n";
- /* Externally defined: static const char enduser_setup_html_default[] = ... */
- #include "enduser_setup/enduser_setup.html.gz.def.h"
- typedef struct scan_listener
- {
- struct tcp_pcb *conn;
- struct scan_listener *next;
- } scan_listener_t;
- typedef struct
- {
- struct espconn *espconn_dns_udp;
- struct tcp_pcb *http_pcb;
- char *http_payload_data;
- uint32_t http_payload_len;
- os_timer_t check_station_timer;
- os_timer_t shutdown_timer;
- int lua_connected_cb_ref;
- int lua_err_cb_ref;
- int lua_dbg_cb_ref;
- scan_listener_t *scan_listeners;
- uint8_t softAPchannel;
- uint8_t success;
- uint8_t callbackDone;
- uint8_t lastStationStatus;
- uint8_t connecting;
- } enduser_setup_state_t;
- static enduser_setup_state_t *state;
- static bool manual = false;
- static task_handle_t do_station_cfg_handle;
- static int enduser_setup_manual(lua_State* L);
- static int enduser_setup_start(lua_State* L);
- static int enduser_setup_stop(lua_State* L);
- static void enduser_setup_stop_callback(void *ptr);
- static void enduser_setup_station_start(void);
- static void enduser_setup_ap_start(void);
- static void enduser_setup_ap_stop(void);
- static void enduser_setup_check_station(void *p);
- static void enduser_setup_debug(int line, const char *str);
- static char ipaddr[16];
- #if ENDUSER_SETUP_DEBUG_ENABLE
- #define ENDUSER_SETUP_DEBUG(str) enduser_setup_debug(__LINE__, str)
- #else
- #define ENDUSER_SETUP_DEBUG(str) do {} while(0)
- #endif
- #define ENDUSER_SETUP_ERROR(str, err, err_severity) \
- do { \
- ENDUSER_SETUP_DEBUG(str); \
- if (err_severity & ENDUSER_SETUP_ERR_FATAL) enduser_setup_stop(lua_getstate());\
- enduser_setup_error(__LINE__, str, err);\
- if (!(err_severity & ENDUSER_SETUP_ERR_NO_RETURN)) \
- return err; \
- } while (0)
- #define ENDUSER_SETUP_ERROR_VOID(str, err, err_severity) \
- do { \
- ENDUSER_SETUP_DEBUG(str); \
- if (err_severity & ENDUSER_SETUP_ERR_FATAL) enduser_setup_stop(lua_getstate());\
- enduser_setup_error(__LINE__, str, err);\
- if (!(err_severity & ENDUSER_SETUP_ERR_NO_RETURN)) \
- return; \
- } while (0)
- static void enduser_setup_debug(int line, const char *str)
- {
- lua_State *L = lua_getstate();
- if(state != NULL && state->lua_dbg_cb_ref != LUA_NOREF)
- {
- lua_rawgeti(L, LUA_REGISTRYINDEX, state->lua_dbg_cb_ref);
- lua_pushfstring(L, "%d: \t%s", line, str);
- luaL_pcallx(L, 1, 0);
- }
- }
- static void enduser_setup_error(int line, const char *str, int err)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_error");
- lua_State *L = lua_getstate();
- if (state != NULL && state->lua_err_cb_ref != LUA_NOREF)
- {
- lua_rawgeti (L, LUA_REGISTRYINDEX, state->lua_err_cb_ref);
- lua_pushnumber(L, err);
- lua_pushfstring(L, "%d: \t%s", line, str);
- luaL_pcallx (L, 2, 0);
- }
- }
- static void enduser_setup_connected_callback()
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_connected_callback");
- lua_State *L = lua_getstate();
- if (state != NULL && state->lua_connected_cb_ref != LUA_NOREF)
- {
- lua_rawgeti(L, LUA_REGISTRYINDEX, state->lua_connected_cb_ref);
- luaL_pcallx(L, 0, 0);
- }
- }
- #include "pm/swtimer.h"
- static void enduser_setup_check_station_start(void)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_check_station_start");
- os_timer_setfn(&(state->check_station_timer), enduser_setup_check_station, NULL);
- SWTIMER_REG_CB(enduser_setup_check_station, SWTIMER_RESUME);
- //The function enduser_setup_check_station checks for a successful connection to the configured AP
- //My guess: I'm not sure about whether or not user feedback is given via the web interface, but I don't see a problem with letting this timer resume.
- os_timer_arm(&(state->check_station_timer), 3*1000, TRUE);
- }
- static void enduser_setup_check_station_stop(void)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_check_station_stop");
- if (state != NULL)
- {
- os_timer_disarm(&(state->check_station_timer));
- }
- }
- /**
- * Check Station
- *
- * Check that we've successfully entered station mode.
- */
- static void enduser_setup_check_station(void *p)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_check_station");
- (void)p;
- struct ip_info ip;
- memset(&ip, 0, sizeof(struct ip_info));
- wifi_get_ip_info(STATION_IF, &ip);
- int i;
- char has_ip = 0;
- for (i = 0; i < sizeof(struct ip_info); ++i)
- {
- has_ip |= ((char *) &ip)[i];
- }
- uint8_t currChan = wifi_get_channel();
- if (has_ip == 0)
- {
- /* No IP Address yet, so check the reported status */
- uint8_t curr_status = wifi_station_get_connect_status();
- char buf[20];
- sprintf(buf, "status=%d,chan=%d", curr_status, currChan);
- ENDUSER_SETUP_DEBUG(buf);
- if (curr_status == 2 || curr_status == 3 || curr_status == 4)
- {
- state->connecting = 0;
- /* If the status is an error status and the channel changed, then cache the
- * status to state since the Station won't be able to report the same status
- * after switching the channel back to the SoftAP's
- */
- if (currChan != state->softAPchannel) {
- state->lastStationStatus = curr_status;
- ENDUSER_SETUP_DEBUG("Turning off Station due to different channel than AP");
- wifi_station_disconnect();
- wifi_set_opmode(SOFTAP_MODE);
- enduser_setup_ap_start();
- }
- }
- return;
- }
- sprintf (ipaddr, "%d.%d.%d.%d", IP2STR(&ip.ip.addr));
- state->success = 1;
- state->lastStationStatus = 5; /* We have an IP Address, so the status is 5 (as of SDK 1.5.1) */
- state->connecting = 0;
- #if ENDUSER_SETUP_DEBUG_ENABLE
- char debuginfo[100];
- sprintf(debuginfo, "AP_CHAN: %d, STA_CHAN: %d", state->softAPchannel, currChan);
- ENDUSER_SETUP_DEBUG(debuginfo);
- #endif
- if (currChan == state->softAPchannel)
- {
- enduser_setup_connected_callback();
- state->callbackDone = 1;
- }
- else
- {
- ENDUSER_SETUP_DEBUG("Turning off Station due to different channel than AP");
- wifi_station_disconnect();
- wifi_set_opmode(SOFTAP_MODE);
- enduser_setup_ap_start();
- }
- enduser_setup_check_station_stop();
- /* Trigger shutdown, but allow time for HTTP client to fetch last status. */
- if (!manual)
- {
- os_timer_setfn(&(state->shutdown_timer), enduser_setup_stop_callback, NULL);
- SWTIMER_REG_CB(enduser_setup_stop_callback, SWTIMER_RESUME);
- //The function enduser_setup_stop_callback frees services and resources used by enduser setup.
- //My guess: Since it would lead to a memory leak, it's probably best to resume this timer.
- os_timer_arm(&(state->shutdown_timer), 10*1000, FALSE);
- }
- }
- /* --- Connection closing handling ----------------------------------------- */
- /* It is far more memory efficient to let the other end close the connection
- * first and respond to that, than us initiating the closing. The latter
- * seems to leave the pcb in a fin_wait state for a long time, which can
- * starve us of memory over time.
- *
- * By instead using the poll function to schedule a hard abort a few seconds
- * from now we achieve a deadline close. The downside is a (very) slight
- * risk of dropping the connection early, but in this application that's
- * hidden by the retries on the JavaScript side anyway.
- */
- /* Callback on timeout to hard-close a connection */
- static err_t force_abort (void *arg, struct tcp_pcb *pcb)
- {
- ENDUSER_SETUP_DEBUG("force_abort");
- (void)arg;
- tcp_poll (pcb, 0, 0);
- tcp_abort (pcb);
- return ERR_ABRT;
- }
- /* Callback to detect a remote-close of a connection */
- static err_t handle_remote_close (void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
- {
- ENDUSER_SETUP_DEBUG("handle_remote_close");
- (void)arg; (void)err;
- if (p) /* server sent us data, just ACK and move on */
- {
- tcp_recved (pcb, p->tot_len);
- pbuf_free (p);
- }
- else /* hey, remote end closed, we can do a soft close safely, yay! */
- {
- tcp_recv (pcb, 0);
- tcp_poll (pcb, 0, 0);
- tcp_close (pcb);
- }
- return ERR_OK;
- }
- /* Set up a deferred close of a connection, as discussed above. */
- static inline void deferred_close (struct tcp_pcb *pcb)
- {
- ENDUSER_SETUP_DEBUG("deferred_close");
- tcp_poll (pcb, force_abort, 15); /* ~3sec from now */
- tcp_recv (pcb, handle_remote_close);
- tcp_sent (pcb, 0);
- }
- /* Convenience function to queue up a close-after-send. */
- static err_t close_once_sent (void *arg, struct tcp_pcb *pcb, u16_t len)
- {
- ENDUSER_SETUP_DEBUG("close_once_sent");
- (void)arg; (void)len;
- deferred_close (pcb);
- return ERR_OK;
- }
- /* ------------------------------------------------------------------------- */
- /**
- * Get length of param value
- *
- * This is being called with a fragment of the parameters passed in the
- * URL for GET requests or part of the body of a POST request.
- * The string will look like one of these
- * "SecretPassword HTTP/1.1"
- * "SecretPassword&wifi_ssid=..."
- * "SecretPassword"
- * The string is searched for the first occurence of deliemiter '&' or ' '.
- * If found return the length up to that position.
- * If not found return the length of the string.
- *
- */
- static int enduser_setup_get_lenth_of_param_value(const char *str)
- {
- char *found = strpbrk (str, "& ");
- if (!found)
- {
- return strlen(str);
- }
- else
- {
- return found - str;
- }
- }
- /**
- * Load HTTP Payload
- *
- * @return - 0 if payload loaded successfully
- * 1 if default html was loaded
- * 2 if out of memory
- */
- static int enduser_setup_http_load_payload(void)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_http_load_payload");
- int err = VFS_RES_ERR;
- int err2 = VFS_RES_ERR;
- int file_len = 0;
- /* Try to open enduser_setup.html.gz from SPIFFS first */
- int f = vfs_open(http_html_gz_filename, "r");
- if (f)
- {
- err = vfs_lseek(f, 0, VFS_SEEK_END);
- file_len = (int) vfs_tell(f);
- err2 = vfs_lseek(f, 0, VFS_SEEK_SET);
- }
- if (!f || err == VFS_RES_ERR || err2 == VFS_RES_ERR)
- {
- if (f)
- {
- vfs_close(f);
- }
- /* If that didn't work, try to open enduser_setup.html from SPIFFS */
- f = vfs_open(http_html_filename, "r");
- if (f)
- {
- err = vfs_lseek(f, 0, VFS_SEEK_END);
- file_len = (int) vfs_tell(f);
- err2 = vfs_lseek(f, 0, VFS_SEEK_SET);
- }
- }
- char cl_hdr[30];
- size_t ce_len = 0;
- sprintf(cl_hdr, http_header_content_len_fmt, file_len);
- size_t cl_len = strlen(cl_hdr);
- if (!f || err == VFS_RES_ERR || err2 == VFS_RES_ERR)
- {
- ENDUSER_SETUP_DEBUG("Unable to load file enduser_setup.html, loading default HTML...");
- if (f)
- {
- vfs_close(f);
- }
- sprintf(cl_hdr, http_header_content_len_fmt, sizeof(enduser_setup_html_default));
- cl_len = strlen(cl_hdr);
- int html_len = LITLEN(enduser_setup_html_default);
- if (enduser_setup_html_default[0] == 0x1f && enduser_setup_html_default[1] == 0x8b)
- {
- ce_len = strlen(http_html_gzip_contentencoding);
- html_len = enduser_setup_html_default_len; /* Defined in enduser_setup/enduser_setup.html.gz.def.h by xxd -i */
- ENDUSER_SETUP_DEBUG("Content is gzipped");
- }
- int payload_len = LITLEN(http_header_200) + cl_len + ce_len + html_len;
- state->http_payload_len = payload_len;
- state->http_payload_data = (char *) malloc(payload_len);
- if (state->http_payload_data == NULL)
- {
- return 2;
- }
- int offset = 0;
- memcpy(&(state->http_payload_data[offset]), &(http_header_200), LITLEN(http_header_200));
- offset += LITLEN(http_header_200);
- if (ce_len > 0)
- {
- offset += sprintf(state->http_payload_data + offset, http_html_gzip_contentencoding, ce_len);
- }
- memcpy(&(state->http_payload_data[offset]), &(cl_hdr), cl_len);
- offset += cl_len;
- memcpy(&(state->http_payload_data[offset]), &(enduser_setup_html_default), sizeof(enduser_setup_html_default));
- return 1;
- }
- char magic[2];
- vfs_read(f, magic, 2);
- if (magic[0] == 0x1f && magic[1] == 0x8b)
- {
- ce_len = strlen(http_html_gzip_contentencoding);
- ENDUSER_SETUP_DEBUG("Content is gzipped");
- }
- int payload_len = LITLEN(http_header_200) + cl_len + ce_len + file_len;
- state->http_payload_len = payload_len;
- state->http_payload_data = (char *) malloc(payload_len);
- if (state->http_payload_data == NULL)
- {
- return 2;
- }
- vfs_lseek(f, 0, VFS_SEEK_SET);
- int offset = 0;
- memcpy(&(state->http_payload_data[offset]), &(http_header_200), LITLEN(http_header_200));
- offset += LITLEN(http_header_200);
- if (ce_len > 0)
- {
- offset += sprintf(state->http_payload_data + offset, http_html_gzip_contentencoding, ce_len);
- }
- memcpy(&(state->http_payload_data[offset]), &(cl_hdr), cl_len);
- offset += cl_len;
- vfs_read(f, &(state->http_payload_data[offset]), file_len);
- vfs_close(f);
- return 0;
- }
- /**
- * De-escape URL data
- *
- * Parse escaped and form encoded data of request.
- *
- * @return - return 0 if the HTTP parameter is decoded into a valid string.
- */
- static int enduser_setup_http_urldecode(char *dst, const char *src, int src_len, int dst_len)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_http_urldecode");
- char *dst_start = dst;
- char *dst_last = dst + dst_len - 1; /* -1 to reserve space for last \0 */
- char a, b;
- int i;
- for (i = 0; i < src_len && *src && dst < dst_last; ++i)
- {
- if ((*src == '%') && ((a = src[1]) && (b = src[2])) && (isxdigit(a) && isxdigit(b)))
- {
- if (a >= 'a')
- {
- a -= 'a'-'A';
- }
- if (a >= 'A')
- {
- a -= ('A' - 10);
- }
- else
- {
- a -= '0';
- }
- if (b >= 'a')
- {
- b -= 'a'-'A';
- }
- if (b >= 'A')
- {
- b -= ('A' - 10);
- }
- else
- {
- b -= '0';
- }
- *dst++ = 16 * a + b;
- src += 3;
- i += 2;
- } else {
- char c = *src++;
- if (c == '+')
- {
- c = ' ';
- }
- *dst++ = c;
- }
- }
- *dst++ = '\0';
- return (i < src_len); /* did we fail to process all the input? */
- }
- /**
- * Task to do the actual station configuration.
- * This config *cannot* be done in the network receive callback or serious
- * issues like memory corruption occur.
- */
- static void do_station_cfg (task_param_t param, uint8_t prio)
- {
- ENDUSER_SETUP_DEBUG("do_station_cfg");
- state->connecting = 1;
- struct station_config *cnf = (struct station_config *)param;
- (void)prio;
- /* Best-effort disconnect-reconfig-reconnect. If the device is currently
- * connected, the disconnect will work but the connect will report failure
- * (though it will actually start connecting). If the devices is not
- * connected, the disconnect may fail but the connect will succeed. A
- * solid head-in-the-sand approach seems to be the best tradeoff on
- * functionality-vs-code-size.
- * TODO: maybe use an error callback to at least report if the set config
- * call fails.
- */
- wifi_station_disconnect ();
- wifi_station_set_config (cnf);
- wifi_station_connect ();
- luaM_free(lua_getstate(), cnf);
- }
- /**
- * Count the number of occurences of a character in a string
- *
- * return the number of times the character was encountered in the string
- */
- static int count_char_occurence(const char *input, const char char_to_count) {
- const char *current = input;
- int occur = 0;
- while (*current != 0) {
- if (*current == char_to_count) occur++;
- current++;
- }
- return occur;
- }
- /* structure used to store the key/value pairs that we find in a HTTP POST body */
- struct keypairs_t {
- char **keypairs;
- int keypairs_nb;
- };
- static void enduser_setup_free_keypairs(struct keypairs_t *kp) {
- if (kp == NULL) return;
- if (kp->keypairs != NULL) {
- for (int i = 0; i < kp->keypairs_nb * 2; i++) {
- free(kp->keypairs[i]);
- }
- }
- free(kp->keypairs);
- free(kp);
- }
- static struct keypairs_t * enduser_setup_alloc_keypairs(int kp_number ){
- struct keypairs_t *kp = malloc(sizeof(struct keypairs_t));
- os_memset(kp, 0, sizeof(struct keypairs_t));
- kp->keypairs = malloc(kp_number * 2 * sizeof(char *));
- kp->keypairs_nb = kp_number;
- return kp;
- }
- /**
- * Parses a form-urlencoded body into a struct keypairs_t, which contains an array of key,values strings and the size of the array.
- */
- static struct keypairs_t *enduser_setup_get_keypairs_from_form(char *form_body, int form_length) {
- int keypair_nb = count_char_occurence(form_body, '&') + 1;
- int equal_nb = count_char_occurence(form_body, '=');
- if (keypair_nb == 1 && equal_nb == 0) {
- ENDUSER_SETUP_DEBUG("No keypair in form body");
- return NULL;
- }
- struct keypairs_t *kp = enduser_setup_alloc_keypairs(keypair_nb);
- int current_idx = 0;
- int err;
- char *body_copy = malloc(form_length+1);
- os_bzero(body_copy, form_length+1);
- os_memcpy(body_copy, form_body, form_length);
- char *tok = strtok(body_copy, "=");
- char last_tok = '=';
- while (tok) {
- size_t len = strlen(tok);
- kp->keypairs[current_idx] = malloc(len + 1);
- err = enduser_setup_http_urldecode(kp->keypairs[current_idx], tok, len, len + 1);
- if (err) {
- ENDUSER_SETUP_DEBUG("Unable to decode parameter");
- enduser_setup_free_keypairs(kp);
- free(body_copy);
- return NULL;
- }
- current_idx++;
- if (current_idx > keypair_nb*2) {
- ENDUSER_SETUP_DEBUG("Too many keypairs!");
- enduser_setup_free_keypairs(kp);
- free(body_copy);
- return NULL;
- }
- if (last_tok == '=') {
- tok = strtok(NULL, "&"); // now search for the '&'
- last_tok='&';
- } else {
- tok = strtok(NULL, "="); // search for the next '='
- last_tok='=';
- }
- }
- free(body_copy);
- return kp;
- }
- /**
- * This function saves the form data received when the configuration is sent to the ESP into a eus_params.lua file
- */
- static int enduser_setup_write_file_with_extra_configuration_data(char *form_body, int form_length) {
- ENDUSER_SETUP_DEBUG("enduser: write data from posted form");
- ENDUSER_SETUP_DEBUG(form_body);
- // We will save the form data into a file in the LUA format: KEY="VALUE", so that configuration data is available for load in the lua code.
- // As input, we have a string as such: "key1=value1&key2=value2&key3=value%203" (urlencoded), the number of '&' tells us how many keypairs there are (the count + 1)
- struct keypairs_t *kp = enduser_setup_get_keypairs_from_form(form_body, form_length);
- if (kp == NULL || kp->keypairs_nb == 0) {
- ENDUSER_SETUP_DEBUG("enduser: No extra configuration.");
- if (kp != NULL) enduser_setup_free_keypairs(kp);
- return 1;
- }
- // Now that we have the keys and the values, let's save them in a lua file
- int p_file = vfs_open("eus_params.lua", "w");
- if (p_file == 0)
- {
- ENDUSER_SETUP_DEBUG("Can't open file in write mode!");
- enduser_setup_free_keypairs(kp);
- return 1;
- }
- // write all key pairs as KEY="VALUE"\n into a Lua table, example:
- // local p = {}
- // p.wifi_ssid="ssid"
- // p.wifi_password="password"
- // p.device_name="foo-node"
- // return p
- vfs_write(p_file, "local p={}\n", 11);
- int idx = 0;
- for( idx = 0; idx < kp->keypairs_nb*2; idx=idx+2){
- char* to_write = kp->keypairs[idx];
- size_t length = strlen(to_write);
- vfs_write(p_file, "p.", 2);
- vfs_write(p_file, to_write, length);
- vfs_write(p_file, "=\"", 2);
- to_write = kp->keypairs[idx+1];
- length = strlen(to_write);
- vfs_write(p_file, to_write, length);
- vfs_write(p_file, "\"\n", 2);
- }
- vfs_write(p_file, "return p\n", 9);
- vfs_close(p_file);
- enduser_setup_free_keypairs(kp);
- // TODO: we could call back in the LUA with an associative table setup, but this is MVP2...
- return 0;
- }
- /**
- * Handle HTTP Credentials
- *
- * @return - return 0 if credentials are found and handled successfully
- * return 1 if credentials aren't found
- * return 2 if an error occured
- */
- static int enduser_setup_http_handle_credentials(char *data, unsigned short data_len)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_http_handle_credentials");
- state->success = 0;
- state->lastStationStatus = 0;
- char *name_str = strstr(data, "wifi_ssid=");
- char *pwd_str = strstr(data, "wifi_password=");
- if (name_str == NULL || pwd_str == NULL)
- {
- ENDUSER_SETUP_DEBUG("Password or SSID string not found");
- return 1;
- }
- int name_field_len = LITLEN("wifi_ssid=");
- int pwd_field_len = LITLEN("wifi_password=");
- char *name_str_start = name_str + name_field_len;
- char *pwd_str_start = pwd_str + pwd_field_len;
- int name_str_len = enduser_setup_get_lenth_of_param_value(name_str_start);
- int pwd_str_len = enduser_setup_get_lenth_of_param_value(pwd_str_start);
- struct station_config *cnf = luaM_malloc(lua_getstate(), sizeof(struct station_config));
- memset(cnf, 0, sizeof(struct station_config));
- cnf->threshold.rssi = -127;
- cnf->threshold.authmode = AUTH_OPEN;
- int err;
- err = enduser_setup_http_urldecode(cnf->ssid, name_str_start, name_str_len, sizeof(cnf->ssid));
- err |= enduser_setup_http_urldecode(cnf->password, pwd_str_start, pwd_str_len, sizeof(cnf->password));
- if (err != 0 || strlen(cnf->ssid) == 0)
- {
- ENDUSER_SETUP_DEBUG("Unable to decode HTTP parameter to valid password or SSID");
- return 1;
- }
- ENDUSER_SETUP_DEBUG("");
- ENDUSER_SETUP_DEBUG("WiFi Credentials Stored");
- ENDUSER_SETUP_DEBUG("-----------------------");
- ENDUSER_SETUP_DEBUG("name: ");
- ENDUSER_SETUP_DEBUG(cnf->ssid);
- ENDUSER_SETUP_DEBUG("pass: ");
- ENDUSER_SETUP_DEBUG(cnf->password);
- ENDUSER_SETUP_DEBUG("-----------------------");
- ENDUSER_SETUP_DEBUG("");
- task_post_medium(do_station_cfg_handle, (task_param_t) cnf);
- return 0;
- }
- /**
- * Serve HTML
- *
- * @return - return 0 if html was served successfully
- */
- static int enduser_setup_http_serve_header(struct tcp_pcb *http_client, const char *header, uint32_t header_len)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_http_serve_header");
- err_t err = tcp_write (http_client, header, header_len, TCP_WRITE_FLAG_COPY);
- if (err != ERR_OK)
- {
- deferred_close (http_client);
- ENDUSER_SETUP_ERROR("http_serve_header failed on tcp_write", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_NONFATAL);
- }
- return 0;
- }
- static err_t streamout_sent (void *arg, struct tcp_pcb *pcb, u16_t len)
- {
- ENDUSER_SETUP_DEBUG("streamout_sent");
- (void)len;
- unsigned offs = (unsigned)arg;
- if (!state || !state->http_payload_data)
- {
- tcp_abort (pcb);
- return ERR_ABRT;
- }
- unsigned wanted_len = state->http_payload_len - offs;
- unsigned buf_free = tcp_sndbuf (pcb);
- if (buf_free < wanted_len)
- wanted_len = buf_free;
- /* no-copy write */
- err_t err = tcp_write (pcb, state->http_payload_data + offs, wanted_len, 0);
- if (err != ERR_OK)
- {
- ENDUSER_SETUP_DEBUG("streaming out html failed");
- tcp_abort (pcb);
- return ERR_ABRT;
- }
- offs += wanted_len;
- if (offs >= state->http_payload_len)
- {
- tcp_sent (pcb, 0);
- deferred_close (pcb);
- }
- else
- tcp_arg (pcb, (void *)offs);
- return ERR_OK;
- }
- /**
- * Serve HTML
- *
- * @return - return 0 if html was served successfully
- */
- static int enduser_setup_http_serve_html(struct tcp_pcb *http_client)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_http_serve_html");
- if (state->http_payload_data == NULL)
- {
- enduser_setup_http_load_payload();
- }
- unsigned chunklen = tcp_sndbuf (http_client);
- tcp_arg (http_client, (void *)chunklen);
- tcp_recv (http_client, 0); /* avoid confusion about the tcp_arg */
- tcp_sent (http_client, streamout_sent);
- /* Begin the no-copy stream-out here */
- err_t err = tcp_write (http_client, state->http_payload_data, chunklen, 0);
- if (err != 0)
- {
- ENDUSER_SETUP_ERROR("http_serve_html failed. tcp_write failed", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_NONFATAL);
- }
- return 0;
- }
- static void enduser_setup_serve_status(struct tcp_pcb *conn)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_serve_status");
- const char fmt[] =
- "HTTP/1.1 200 OK\r\n"
- "Cache-control:no-cache\r\n"
- "Connection:close\r\n"
- "Access-Control-Allow-Origin: *\r\n"
- "Content-type:text/plain\r\n"
- "Content-length: %d\r\n"
- "\r\n"
- "%s";
- const char *states[] =
- {
- "Idle.",
- "Connecting to \"%s\".",
- "Failed to connect to \"%s\" - Wrong password.",
- "Failed to connect to \"%s\" - Network not found.",
- "Failed to connect.",
- "Connected to \"%s\" (%s)."
- };
- const size_t num_states = sizeof(states)/sizeof(states[0]);
- uint8_t curr_state = state->lastStationStatus > 0 ? state->lastStationStatus : wifi_station_get_connect_status ();
- if (curr_state < num_states)
- {
- switch (curr_state)
- {
- case STATION_CONNECTING:
- case STATION_WRONG_PASSWORD:
- case STATION_NO_AP_FOUND:
- case STATION_GOT_IP:
- {
- const char *s = states[curr_state];
- struct station_config config;
- wifi_station_get_config(&config);
- config.ssid[31] = '\0';
- struct ip_info ip_info;
- wifi_get_ip_info(STATION_IF , &ip_info);
- char ip_addr[16];
- ip_addr[0] = '\0';
- if (curr_state == STATION_GOT_IP)
- {
- sprintf (ip_addr, "%d.%d.%d.%d", IP2STR(&ip_info.ip.addr));
- }
- int state_len = strlen(s);
- int ip_len = strlen(ip_addr);
- int ssid_len = strlen(config.ssid);
- int status_len = state_len + ssid_len + ip_len + 1;
- char status_buf[status_len];
- memset(status_buf, 0, status_len);
- status_len = sprintf(status_buf, s, config.ssid, ip_addr);
- int buf_len = sizeof(fmt) + status_len + 10; /* 10 = (9+1), 1 byte is '\0' and 9 are reserved for length field */
- char buf[buf_len];
- memset(buf, 0, buf_len);
- int output_len = sprintf(buf, fmt, status_len, status_buf);
- enduser_setup_http_serve_header(conn, buf, output_len);
- }
- break;
- /* Handle non-formatted strings */
- default:
- {
- const char *s = states[curr_state];
- int status_len = strlen(s);
- int buf_len = sizeof(fmt) + status_len + 10; /* 10 = (9+1), 1 byte is '\0' and 9 are reserved for length field */
- char buf[buf_len];
- memset(buf, 0, buf_len);
- int output_len = sprintf(buf, fmt, status_len, s);
- enduser_setup_http_serve_header(conn, buf, output_len);
- }
- break;
- }
- }
- else
- {
- enduser_setup_http_serve_header(conn, http_header_500, LITLEN(http_header_500));
- }
- }
- static void enduser_setup_serve_status_as_json (struct tcp_pcb *http_client)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_serve_status_as_json");
- /* If the station is currently shut down because of wi-fi channel issue, use the cached status */
- uint8_t curr_status = state->lastStationStatus > 0 ? state->lastStationStatus : wifi_station_get_connect_status ();
- char json_payload[64];
- struct ip_info ip_info;
- if (curr_status == 5)
- {
- wifi_get_ip_info(STATION_IF , &ip_info);
- /* If IP address not yet available, get now */
- if (strlen(ipaddr) == 0)
- {
- sprintf(ipaddr, "%d.%d.%d.%d", IP2STR(&ip_info.ip.addr));
- }
- sprintf(json_payload, "{\"deviceid\":\"%s\", \"status\":%d}", ipaddr, curr_status);
- }
- else
- {
- sprintf(json_payload, "{\"deviceid\":\"%06X\", \"status\":%d}", system_get_chip_id(), curr_status);
- }
- const char fmt[] =
- "HTTP/1.1 200 OK\r\n"
- "Cache-Control: no-cache\r\n"
- "Connection: close\r\n"
- "Access-Control-Allow-Origin: *\r\n"
- "Content-Type: application/json\r\n"
- "Content-Length: %d\r\n"
- "\r\n"
- "%s";
- int len = strlen(json_payload);
- char buf[strlen(fmt) + NUMLEN(len) + len - 4];
- len = sprintf (buf, fmt, len, json_payload);
- enduser_setup_http_serve_header (http_client, buf, len);
- }
- static void enduser_setup_handle_OPTIONS (struct tcp_pcb *http_client, char *data, unsigned short data_len)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_handle_OPTIONS");
- const char json[] =
- "HTTP/1.1 200 OK\r\n"
- "Cache-Control: no-cache\r\n"
- "Connection: close\r\n"
- "Content-Type: application/json\r\n"
- "Content-Length: 0\r\n"
- "Access-Control-Allow-Origin: *\r\n"
- "Access-Control-Allow-Methods: GET\r\n"
- "Access-Control-Allow-Age: 300\r\n"
- "\r\n";
- const char others[] =
- "HTTP/1.1 200 OK\r\n"
- "Cache-Control: no-cache\r\n"
- "Connection: close\r\n"
- "Content-Length: 0\r\n"
- "\r\n";
- int type = 0;
- if (strncmp(data, "GET ", 4) == 0)
- {
- if (strncmp(data + 4, "/aplist", 7) == 0 || strncmp(data + 4, "/setwifi?", 9) == 0 || strncmp(data + 4, "/status.json", 12) == 0)
- {
- enduser_setup_http_serve_header (http_client, json, strlen(json));
- return;
- }
- }
- enduser_setup_http_serve_header (http_client, others, strlen(others));
- return;
- }
- static void enduser_setup_handle_POST(struct tcp_pcb *http_client, char* data, size_t data_len)
- {
- ENDUSER_SETUP_DEBUG("Handling POST");
- if (strncmp(data + 5, "/setwifi ", 9) == 0) // User clicked the submit button
- {
- char* body=strstr(data, "\r\n\r\n");
- char *content_length_str = strstr(data, "Content-Length: ");
- if( body == NULL || content_length_str == NULL)
- {
- enduser_setup_http_serve_header(http_client, http_header_400, LITLEN(http_header_400));
- return;
- }
- int bodylength = atoi(content_length_str + 16);
- body += 4; // length of the double CRLF found above
- switch (enduser_setup_http_handle_credentials(body, bodylength))
- {
- case 0: {
- // all went fine, extract all the form data into a file
- enduser_setup_write_file_with_extra_configuration_data(body, bodylength);
- // redirect user to the base page with the trying flag
- enduser_setup_http_serve_header(http_client, http_header_302_trying, LITLEN(http_header_302_trying));
- break;
- }
- case 1:
- enduser_setup_http_serve_header(http_client, http_header_400, LITLEN(http_header_400));
- break;
- default:
- ENDUSER_SETUP_ERROR_VOID("http_recvcb failed. Failed to handle wifi credentials.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_NONFATAL);
- break;
- }
- }
- }
- /* --- WiFi AP scanning support -------------------------------------------- */
- static void free_scan_listeners (void)
- {
- ENDUSER_SETUP_DEBUG("free_scan_listeners");
- if (!state || !state->scan_listeners)
- {
- return;
- }
- scan_listener_t *l = state->scan_listeners , *next = 0;
- while (l)
- {
- next = l->next;
- free (l);
- l = next;
- }
- state->scan_listeners = 0;
- }
- static void remove_scan_listener (scan_listener_t *l)
- {
- ENDUSER_SETUP_DEBUG("remove_scan_listener");
- if (state)
- {
- scan_listener_t **sl = &state->scan_listeners;
- while (*sl)
- {
- /* Remove any and all references to the closed conn from the scan list */
- if (*sl == l)
- {
- *sl = l->next;
- free (l);
- /* No early exit to guard against multi-entry on list */
- }
- else
- sl = &(*sl)->next;
- }
- }
- }
- static char *escape_ssid (char *dst, const char *src)
- {
- for (int i = 0; i < 32 && src[i]; ++i)
- {
- if (src[i] == '\\' || src[i] == '"')
- {
- *dst++ = '\\';
- }
- *dst++ = src[i];
- }
- return dst;
- }
- static void notify_scan_listeners (const char *payload, size_t sz)
- {
- ENDUSER_SETUP_DEBUG("notify_scan_listeners");
- if (!state)
- {
- return;
- }
- for (scan_listener_t *l = state->scan_listeners; l; l = l->next)
- {
- if (tcp_write (l->conn, payload, sz, TCP_WRITE_FLAG_COPY) != ERR_OK)
- {
- ENDUSER_SETUP_DEBUG("failed to send wifi list");
- tcp_abort (l->conn);
- }
- else
- tcp_sent (l->conn, close_once_sent); /* TODO: time-out sends? */
- l->conn = 0;
- }
- free_scan_listeners ();
- }
- static void on_scan_done (void *arg, STATUS status)
- {
- ENDUSER_SETUP_DEBUG("on_scan_done");
- if (!state || !state->scan_listeners)
- {
- return;
- }
- if (status == OK)
- {
- unsigned num_nets = 0;
- for (struct bss_info *wn = arg; wn; wn = wn->next.stqe_next)
- {
- ++num_nets;
- }
- const char header_fmt[] =
- "HTTP/1.1 200 OK\r\n"
- "Connection:close\r\n"
- "Cache-control:no-cache\r\n"
- "Access-Control-Allow-Origin: *\r\n"
- "Content-type:application/json\r\n"
- "Content-length:%4d\r\n"
- "\r\n";
- const size_t hdr_sz = sizeof (header_fmt) +1 -1; /* +expand %4d, -\0 */
- /* To be able to safely escape a pathological SSID, we need 2*32 bytes */
- const size_t max_entry_sz = 27 + 2*32 + 6; /* {"ssid":"","rssi":,"chan":} */
- const size_t alloc_sz = hdr_sz + num_nets * max_entry_sz + 3;
- char *http = calloc (1, alloc_sz);
- if (!http)
- {
- goto serve_500;
- }
- char *p = http + hdr_sz; /* start body where we know it will be */
- /* p[0] will be clobbered when we print the header, so fill it in last */
- ++p;
- for (struct bss_info *wn = arg; wn; wn = wn->next.stqe_next)
- {
- if (wn != arg)
- {
- *p++ = ',';
- }
- const char entry_start[] = "{\"ssid\":\"";
- strcpy (p, entry_start);
- p += sizeof (entry_start) -1;
- p = escape_ssid (p, wn->ssid);
- const char entry_mid[] = "\",\"rssi\":";
- strcpy (p, entry_mid);
- p += sizeof (entry_mid) -1;
- p += sprintf (p, "%d", wn->rssi);
- const char entry_chan[] = ",\"chan\":";
- strcpy (p, entry_chan);
- p += sizeof (entry_chan) -1;
- p += sprintf (p, "%d", wn->channel);
- *p++ = '}';
- }
- *p++ = ']';
- size_t body_sz = (p - http) - hdr_sz;
- sprintf (http, header_fmt, body_sz);
- http[hdr_sz] = '['; /* Rewrite the \0 with the correct start of body */
- notify_scan_listeners (http, hdr_sz + body_sz);
- ENDUSER_SETUP_DEBUG(http + hdr_sz);
- free (http);
- return;
- }
- serve_500:
- notify_scan_listeners (http_header_500, LITLEN(http_header_500));
- }
- /* ---- end WiFi AP scan support ------------------------------------------- */
- static err_t enduser_setup_http_recvcb(void *arg, struct tcp_pcb *http_client, struct pbuf *p, err_t err)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_http_recvcb");
- if (!state || err != ERR_OK)
- {
- if (!state)
- ENDUSER_SETUP_DEBUG("ignoring received data while stopped");
- tcp_abort (http_client);
- return ERR_ABRT;
- }
- if (!p) /* remote side closed, close our end too */
- {
- ENDUSER_SETUP_DEBUG("connection closed");
- scan_listener_t *l = arg; /* if it's waiting for scan, we have a ptr here */
- if (l)
- remove_scan_listener (l);
- deferred_close (http_client);
- return ERR_OK;
- }
- char *data = calloc (1, p->tot_len + 1);
- if (!data)
- return ERR_MEM;
- unsigned data_len = pbuf_copy_partial (p, data, p->tot_len, 0);
- tcp_recved (http_client, p->tot_len);
- pbuf_free (p);
- err_t ret = ERR_OK;
- #if ENDUSER_SETUP_DEBUG_SHOW_HTTP_REQUEST
- ENDUSER_SETUP_DEBUG(data);
- #endif
- if (strncmp(data, "GET ", 4) == 0)
- {
- if (strncmp(data + 4, "/ ", 2) == 0 || strncmp(data + 4, "/?", 2) == 0)
- {
- if (enduser_setup_http_serve_html(http_client) != 0)
- {
- ENDUSER_SETUP_ERROR("http_recvcb failed. Unable to send HTML.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_NONFATAL);
- }
- else
- {
- goto free_out; /* streaming now in progress */
- }
- }
- else if (strncmp(data + 4, "/aplist", 7) == 0)
- {
- /* Don't do an AP Scan while station is trying to connect to Wi-Fi */
- if (state->connecting == 0)
- {
- scan_listener_t *l = malloc (sizeof (scan_listener_t));
- if (!l)
- {
- ENDUSER_SETUP_ERROR("out of memory", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_NONFATAL);
- }
- bool already = (state->scan_listeners != NULL);
- tcp_arg (http_client, l);
- /* TODO: check if also need a tcp_err() cb, or if recv() is enough */
- l->conn = http_client;
- l->next = state->scan_listeners;
- state->scan_listeners = l;
- if (!already)
- {
- if (!wifi_station_scan(NULL, on_scan_done))
- {
- enduser_setup_http_serve_header(http_client, http_header_500, LITLEN(http_header_500));
- deferred_close (l->conn);
- l->conn = 0;
- free_scan_listeners();
- }
- }
- goto free_out; /* request queued */
- }
- else
- {
- /* Return No Content status to the caller */
- enduser_setup_http_serve_header(http_client, http_header_204, LITLEN(http_header_204));
- }
- }
- else if (strncmp(data + 4, "/status.json", 12) == 0)
- {
- enduser_setup_serve_status_as_json(http_client);
- }
- else if (strncmp(data + 4, "/status", 7) == 0)
- {
- enduser_setup_serve_status(http_client);
- }
- else if (strncmp(data + 4, "/update?", 8) == 0)
- {
- switch (enduser_setup_http_handle_credentials(data, data_len))
- {
- case 0:
- enduser_setup_http_serve_header(http_client, http_header_302, LITLEN(http_header_302));
- break;
- case 1:
- enduser_setup_http_serve_header(http_client, http_header_400, LITLEN(http_header_400));
- break;
- default:
- ENDUSER_SETUP_ERROR("http_recvcb failed. Failed to handle wifi credentials.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_NONFATAL);
- break;
- }
- }
- else if (strncmp(data + 4, "/generate_204", 13) == 0)
- {
- /* Convince Android devices that they have internet access to avoid pesky dialogues. */
- enduser_setup_http_serve_header(http_client, http_header_204, LITLEN(http_header_204));
- }
- else
- {
- ENDUSER_SETUP_DEBUG("serving 404");
- enduser_setup_http_serve_header(http_client, http_header_404, LITLEN(http_header_404));
- }
- }
- else if (strncmp(data, "OPTIONS ", 8) == 0)
- {
- enduser_setup_handle_OPTIONS(http_client, data, data_len);
- }
- else if (strncmp(data, "POST ", 5) == 0)
- {
- enduser_setup_handle_POST(http_client, data, data_len);
- }
- else /* not GET or OPTIONS */
- {
- enduser_setup_http_serve_header(http_client, http_header_405, LITLEN(http_header_405));
- }
- deferred_close (http_client);
- free_out:
- free (data);
- return ret;
- }
- static err_t enduser_setup_http_connectcb(void *arg, struct tcp_pcb *pcb, err_t err)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_http_connectcb");
- if (!state)
- {
- ENDUSER_SETUP_DEBUG("connect callback but no state?!");
- tcp_abort (pcb);
- return ERR_ABRT;
- }
- tcp_accepted (state->http_pcb);
- tcp_recv (pcb, enduser_setup_http_recvcb);
- tcp_nagle_disable (pcb);
- return ERR_OK;
- }
- static int enduser_setup_http_start(void)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_http_start");
- struct tcp_pcb *pcb = tcp_new ();
- if (pcb == NULL)
- {
- ENDUSER_SETUP_ERROR("http_start failed. Memory allocation failed (http_pcb == NULL).", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_FATAL);
- }
- if (tcp_bind (pcb, IP_ADDR_ANY, 80) != ERR_OK)
- {
- ENDUSER_SETUP_ERROR("http_start bind failed", ENDUSER_SETUP_ERR_SOCKET_ALREADY_OPEN, ENDUSER_SETUP_ERR_FATAL);
- }
- state->http_pcb = tcp_listen (pcb);
- if (!state->http_pcb)
- {
- tcp_abort(pcb); /* original wasn't freed for us */
- ENDUSER_SETUP_ERROR("http_start listen failed", ENDUSER_SETUP_ERR_SOCKET_ALREADY_OPEN, ENDUSER_SETUP_ERR_FATAL);
- }
- tcp_accept (state->http_pcb, enduser_setup_http_connectcb);
- /* TODO: check lwip tcp timeouts */
- #if 0
- err = espconn_regist_time(state->espconn_http_tcp, 2, 0);
- if (err == ESPCONN_ARG)
- {
- 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);
- }
- #endif
- int err = enduser_setup_http_load_payload();
- if (err == 1)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_http_start info. Loaded default HTML.");
- }
- else if (err == 2)
- {
- ENDUSER_SETUP_ERROR("http_start failed. Unable to allocate memory for HTTP payload.", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_FATAL);
- }
- return 0;
- }
- static void enduser_setup_http_stop(void)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_http_stop");
- if (state && state->http_pcb)
- {
- tcp_close (state->http_pcb); /* cannot fail for listening sockets */
- state->http_pcb = 0;
- }
- }
- static void enduser_setup_ap_stop(void)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_ap_stop");
- wifi_set_opmode(~SOFTAP_MODE & wifi_get_opmode());
- }
- static void enduser_setup_ap_start(void)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_ap_start");
- struct softap_config cnf;
- memset(&(cnf), 0, sizeof(struct softap_config));
- #ifndef ENDUSER_SETUP_AP_SSID
- #define ENDUSER_SETUP_AP_SSID "SetupGadget"
- #endif
- char ssid[] = ENDUSER_SETUP_AP_SSID;
- int ssid_name_len = strlen(ssid);
- memcpy(&(cnf.ssid), ssid, ssid_name_len);
- uint8_t mac[6];
- wifi_get_macaddr(SOFTAP_IF, mac);
- cnf.ssid[ssid_name_len] = '_';
- sprintf(cnf.ssid + ssid_name_len + 1, "%02X%02X%02X", mac[3], mac[4], mac[5]);
- cnf.ssid_len = ssid_name_len + 7;
- cnf.channel = state == NULL? 1 : state->softAPchannel;
- cnf.authmode = AUTH_OPEN;
- cnf.ssid_hidden = 0;
- cnf.max_connection = 5;
- cnf.beacon_interval = 100;
- wifi_set_opmode(STATIONAP_MODE);
- wifi_softap_set_config(&cnf);
- #if ENDUSER_SETUP_DEBUG_ENABLE
- char debuginfo[100];
- sprintf(debuginfo, "SSID: %s, CHAN: %d", cnf.ssid, cnf.channel);
- ENDUSER_SETUP_DEBUG(debuginfo);
- #endif
- }
- static void on_initial_scan_done (void *arg, STATUS status)
- {
- ENDUSER_SETUP_DEBUG("on_initial_scan_done");
- if (state == NULL)
- {
- return;
- }
- int8_t rssi = -100;
- if (status == OK)
- {
- /* Find the strongest signal and use the same wi-fi channel for the SoftAP. This is based on an assumption that end-user
- * will likely be choosing that AP to connect to. Since ESP only has one radio, STA and AP must share same channel. This
- * algorithm tries to minimize the SoftAP unavailability when the STA is connecting to verify. If the STA must switch to
- * another wi-fi channel, then the SoftAP will follow it, but the end-user's device will not know that the SoftAP is no
- * longer there until it times out. To mitigate, we try to prevent the need to switch channels, and if a switch does occur,
- * be quick about returning to this channel so that status info can be delivered to the end-user's device before shutting
- * down EUS.
- */
- for (struct bss_info *wn = arg; wn; wn = wn->next.stqe_next)
- {
- if (wn->rssi > rssi)
- {
- state->softAPchannel = wn->channel;
- rssi = wn->rssi;
- }
- }
- }
- enduser_setup_ap_start();
- enduser_setup_check_station_start();
- }
- static void enduser_setup_dns_recv_callback(void *arg, char *recv_data, unsigned short recv_len)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_dns_recv_callback.");
- struct espconn *callback_espconn = arg;
- struct ip_info ip_info;
- uint32_t qname_len = strlen(&(recv_data[12])) + 1; /* \0=1byte */
- uint32_t dns_reply_static_len = (uint32_t) sizeof(dns_header) + (uint32_t) sizeof(dns_body) + 2 + 4; /* dns_id=2bytes, ip=4bytes */
- uint32_t dns_reply_len = dns_reply_static_len + qname_len;
- #if ENDUSER_SETUP_DEBUG_ENABLE
- char *qname = malloc(qname_len + 12);
- if (qname != NULL)
- {
- sprintf(qname, "DNS QUERY = %s", &(recv_data[12]));
- uint32_t p;
- int i, j;
- for(i=12;i<(int)strlen(qname);i++)
- {
- p=qname[i];
- for(j=0;j<(int)p;j++)
- {
- qname[i]=qname[i+1];
- i=i+1;
- }
- qname[i]='.';
- }
- qname[i-1]='\0';
- ENDUSER_SETUP_DEBUG(qname);
- free(qname);
- }
- #endif
- uint8_t if_mode = wifi_get_opmode();
- if ((if_mode & SOFTAP_MODE) == 0)
- {
- ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. Interface mode not supported.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_FATAL);
- }
- uint8_t if_index = (if_mode == STATION_MODE? STATION_IF : SOFTAP_IF);
- if (wifi_get_ip_info(if_index , &ip_info) == false)
- {
- ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. Unable to get interface IP.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_FATAL);
- }
- char *dns_reply = (char *) malloc(dns_reply_len);
- if (dns_reply == NULL)
- {
- ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. Failed to allocate memory.", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_NONFATAL);
- }
- uint32_t insert_byte = 0;
- memcpy(&(dns_reply[insert_byte]), recv_data, 2);
- insert_byte += 2;
- memcpy(&(dns_reply[insert_byte]), dns_header, sizeof(dns_header));
- insert_byte += (uint32_t) sizeof(dns_header);
- memcpy(&(dns_reply[insert_byte]), &(recv_data[12]), qname_len);
- insert_byte += qname_len;
- memcpy(&(dns_reply[insert_byte]), dns_body, sizeof(dns_body));
- insert_byte += (uint32_t) sizeof(dns_body);
- memcpy(&(dns_reply[insert_byte]), &(ip_info.ip), 4);
- /* SDK 1.4.0 changed behaviour, for UDP server need to look up remote ip/port */
- remot_info *pr = 0;
- if (espconn_get_connection_info(callback_espconn, &pr, 0) != ESPCONN_OK)
- {
- 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);
- }
- callback_espconn->proto.udp->remote_port = pr->remote_port;
- os_memmove(callback_espconn->proto.udp->remote_ip, pr->remote_ip, 4);
- int8_t err;
- err = espconn_send(callback_espconn, dns_reply, dns_reply_len);
- free(dns_reply);
- if (err == ESPCONN_MEM)
- {
- ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. Failed to allocate memory for send.", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_FATAL);
- }
- else if (err == ESPCONN_ARG)
- {
- ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. Can't execute transmission.", ENDUSER_SETUP_ERR_CONNECTION_NOT_FOUND, ENDUSER_SETUP_ERR_FATAL);
- }
- else if (err == ESPCONN_MAXNUM)
- {
- ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. Buffer full. Discarding...", ENDUSER_SETUP_ERR_MAX_NUMBER, ENDUSER_SETUP_ERR_NONFATAL);
- }
- else if (err == ESPCONN_IF)
- {
- ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. Send UDP data failed", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_NONFATAL);
- }
- else if (err != 0)
- {
- ENDUSER_SETUP_ERROR_VOID("dns_recv_callback failed. espconn_send failed", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_FATAL);
- }
- }
- static void enduser_setup_free(void)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_free");
- if (state == NULL)
- {
- return;
- }
- /* Make sure no running timers are left. */
- os_timer_disarm(&(state->check_station_timer));
- os_timer_disarm(&(state->shutdown_timer));
- if (state->espconn_dns_udp != NULL)
- {
- if (state->espconn_dns_udp->proto.udp != NULL)
- {
- free(state->espconn_dns_udp->proto.udp);
- }
- free(state->espconn_dns_udp);
- }
- free(state->http_payload_data);
- free_scan_listeners ();
- free(state);
- state = NULL;
- }
- static int enduser_setup_dns_start(void)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_dns_start");
- if (state->espconn_dns_udp != NULL)
- {
- ENDUSER_SETUP_ERROR("dns_start failed. Appears to already be started (espconn_dns_udp != NULL).", ENDUSER_SETUP_ERR_ALREADY_INITIALIZED, ENDUSER_SETUP_ERR_FATAL);
- }
- state->espconn_dns_udp = (struct espconn *) malloc(sizeof(struct espconn));
- if (state->espconn_dns_udp == NULL)
- {
- ENDUSER_SETUP_ERROR("dns_start failed. Memory allocation failed (espconn_dns_udp == NULL).", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_FATAL);
- }
- esp_udp *esp_udp_data = (esp_udp *) malloc(sizeof(esp_udp));
- if (esp_udp_data == NULL)
- {
- ENDUSER_SETUP_ERROR("dns_start failed. Memory allocation failed (esp_udp == NULL).", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_FATAL);
- }
- memset(state->espconn_dns_udp, 0, sizeof(struct espconn));
- memset(esp_udp_data, 0, sizeof(esp_udp));
- state->espconn_dns_udp->proto.udp = esp_udp_data;
- state->espconn_dns_udp->type = ESPCONN_UDP;
- state->espconn_dns_udp->state = ESPCONN_NONE;
- esp_udp_data->local_port = 53;
- int8_t err;
- err = espconn_regist_recvcb(state->espconn_dns_udp, enduser_setup_dns_recv_callback);
- if (err != 0)
- {
- ENDUSER_SETUP_ERROR("dns_start failed. Couldn't add receive callback, unknown error.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_FATAL);
- }
- err = espconn_create(state->espconn_dns_udp);
- if (err == ESPCONN_ISCONN)
- {
- 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);
- }
- else if (err == ESPCONN_MEM)
- {
- ENDUSER_SETUP_ERROR("dns_start failed. Couldn't create connection, out of memory.", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_FATAL);
- }
- else if (err != 0)
- {
- ENDUSER_SETUP_ERROR("dns_start failed. Couldn't create connection, unknown error.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_FATAL);
- }
- return 0;
- }
- static void enduser_setup_dns_stop(void)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_dns_stop");
- if (state != NULL && state->espconn_dns_udp != NULL)
- {
- espconn_delete(state->espconn_dns_udp);
- }
- }
- static int enduser_setup_init(lua_State *L)
- {
- /* Note: Normal to not see this debug message on first invocation because debug callback is set below */
- ENDUSER_SETUP_DEBUG("enduser_setup_init");
- /* Defer errors until the bottom, so that callbacks can be set, if applicable, to handle debug and error messages */
- int ret = 0;
- if (state != NULL)
- {
- ret = ENDUSER_SETUP_ERR_ALREADY_INITIALIZED;
- }
- else
- {
- state = (enduser_setup_state_t *) calloc(1, sizeof(enduser_setup_state_t));
- if (state == NULL)
- {
- ret = ENDUSER_SETUP_ERR_OUT_OF_MEMORY;
- }
- else
- {
- memset(state, 0, sizeof(enduser_setup_state_t));
- state->lua_connected_cb_ref = LUA_NOREF;
- state->lua_err_cb_ref = LUA_NOREF;
- state->lua_dbg_cb_ref = LUA_NOREF;
- state->softAPchannel = 1;
- state->success = 0;
- state->callbackDone = 0;
- state->lastStationStatus = 0;
- state->connecting = 0;
- }
- }
- if (!lua_isnoneornil(L, 1))
- {
- lua_pushvalue(L, 1);
- state->lua_connected_cb_ref = luaL_ref(L, LUA_REGISTRYINDEX);
- }
- if (!lua_isnoneornil(L, 2))
- {
- lua_pushvalue (L, 2);
- state->lua_err_cb_ref = luaL_ref(L, LUA_REGISTRYINDEX);
- }
- if (!lua_isnoneornil(L, 3))
- {
- lua_pushvalue (L, 3);
- state->lua_dbg_cb_ref = luaL_ref(L, LUA_REGISTRYINDEX);
- ENDUSER_SETUP_DEBUG("enduser_setup_init: Debug callback has been set");
- }
- if (ret == ENDUSER_SETUP_ERR_ALREADY_INITIALIZED)
- {
- ENDUSER_SETUP_ERROR("init failed. Appears to already be started. EUS will shut down now.", ENDUSER_SETUP_ERR_ALREADY_INITIALIZED, ENDUSER_SETUP_ERR_FATAL);
- }
- else if (ret == ENDUSER_SETUP_ERR_OUT_OF_MEMORY)
- {
- ENDUSER_SETUP_ERROR("init failed. Unable to allocate memory.", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_FATAL);
- }
- return ret;
- }
- static int enduser_setup_manual(lua_State *L)
- {
- if (!lua_isnoneornil (L, 1))
- {
- manual = lua_toboolean (L, 1);
- }
- lua_pushboolean (L, manual);
- return 1;
- }
- static int enduser_setup_start(lua_State *L)
- {
- /* Note: The debug callback is set in enduser_setup_init. It's normal to not see this debug message on first invocation. */
- ENDUSER_SETUP_DEBUG("enduser_setup_start");
- ipaddr[0] = '\0';
- if (!do_station_cfg_handle)
- {
- do_station_cfg_handle = task_get_id(do_station_cfg);
- }
- if(enduser_setup_init(L))
- {
- goto failed;
- }
- if (!manual)
- {
- ENDUSER_SETUP_DEBUG("Performing AP Scan to identify likely AP's channel. Enabling Station if it wasn't already.");
- wifi_set_opmode(STATION_MODE | wifi_get_opmode());
- wifi_station_scan(NULL, on_initial_scan_done);
- }
- else
- {
- enduser_setup_check_station_start();
- }
- if(enduser_setup_dns_start())
- {
- goto failed;
- }
- if(enduser_setup_http_start())
- {
- goto failed;
- }
- goto out;
- failed:
- enduser_setup_stop(lua_getstate());
- out:
- return 0;
- }
- /**
- * A wrapper needed for type-reasons strictness reasons.
- */
- static void enduser_setup_stop_callback(void *ptr)
- {
- enduser_setup_stop(lua_getstate());
- }
- static int enduser_setup_stop(lua_State* L)
- {
- ENDUSER_SETUP_DEBUG("enduser_setup_stop");
- if (!manual)
- {
- enduser_setup_ap_stop();
- }
- if (state != NULL && state->success && !state->callbackDone)
- {
- wifi_set_opmode(STATION_MODE | wifi_get_opmode());
- wifi_station_connect();
- enduser_setup_connected_callback();
- }
- enduser_setup_dns_stop();
- enduser_setup_http_stop();
- enduser_setup_free();
- return 0;
- }
- LROT_BEGIN(enduser_setup, NULL, 0)
- LROT_FUNCENTRY( manual, enduser_setup_manual )
- LROT_FUNCENTRY( start, enduser_setup_start )
- LROT_FUNCENTRY( stop, enduser_setup_stop )
- LROT_END(enduser_setup, NULL, 0)
- NODEMCU_MODULE(ENDUSER_SETUP, "enduser_setup", enduser_setup, NULL);
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