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nodemcu-firmware/app/modules/enduser_setup.c

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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; charset=utf-8\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:10\r\nConnection:close\r\n\r\nNot found\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:6\r\nConnection:close\r\n\r\nError\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"
// The tcp_arg can be either a pointer to the scan_listener_t or http_request_buffer_t.
// The enum defines which one it is.
typedef enum {
SCAN_LISTENER_STRUCT_TYPE = 1,
HTTP_REQUEST_BUFFER_STRUCT_TYPE = 2
} struct_type_t;
typedef struct {
struct_type_t struct_type;
} tcp_arg_t;
typedef struct scan_listener
{
struct_type_t struct_type;
struct tcp_pcb *conn;
struct scan_listener *next;
} scan_listener_t;
typedef struct {
struct_type_t struct_type;
size_t length;
char data[0];
} http_request_buffer_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_pushinteger(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");
if( body == NULL)
{
enduser_setup_http_serve_header(http_client, http_header_400, LITLEN(http_header_400));
return;
}
body += 4; // length of the double CRLF found above
int bodylength = (data + data_len) - body;
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;
}
} else {
enduser_setup_http_serve_header(http_client, http_header_404, LITLEN(http_header_404));
}
}
/* --- 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;
}
tcp_arg_t *tcp_arg_ptr = arg;
if (!p) /* remote side closed, close our end too */
{
ENDUSER_SETUP_DEBUG("connection closed");
if (tcp_arg_ptr) {
if (tcp_arg_ptr->struct_type == SCAN_LISTENER_STRUCT_TYPE) {
remove_scan_listener ((scan_listener_t *)tcp_arg_ptr);
} else if (tcp_arg_ptr->struct_type == HTTP_REQUEST_BUFFER_STRUCT_TYPE) {
free(tcp_arg_ptr);
}
}
deferred_close (http_client);
return ERR_OK;
}
http_request_buffer_t *hrb;
if (!tcp_arg_ptr) {
hrb = calloc(1, sizeof(*hrb));
if (!hrb) {
goto general_fail;
}
hrb->struct_type = HTTP_REQUEST_BUFFER_STRUCT_TYPE;
tcp_arg(http_client, hrb);
} else if (tcp_arg_ptr->struct_type == HTTP_REQUEST_BUFFER_STRUCT_TYPE) {
hrb = (http_request_buffer_t *) tcp_arg_ptr;
} else {
goto general_fail;
}
// Append the new data
size_t newlen = hrb->length + p->tot_len;
void *old_hrb = hrb;
hrb = realloc(hrb, sizeof(*hrb) + newlen + 1);
tcp_arg(http_client, hrb);
if (!hrb) {
free(old_hrb);
goto general_fail;
}
pbuf_copy_partial(p, hrb->data + hrb->length, p->tot_len, 0);
hrb->data[newlen] = 0;
hrb->length = newlen;
tcp_recved (http_client, p->tot_len);
pbuf_free (p);
// see if we have the whole request.
// Rely on the fact that the header should not contain a null character
char *end_of_header = strstr(hrb->data, "\r\n\r\n");
if (end_of_header == 0) {
return ERR_OK;
}
end_of_header += 4;
// We have the entire header, now see if there is any content. If we don't find the
// content-length header, then there is no content and we can process immediately.
// The content-length header can also be missing if the browser is using chunked
// encoding.
bool is_chunked = FALSE;
for (const char *hdr = hrb->data; hdr && hdr < end_of_header; hdr = strchr(hdr, '\n')) {
hdr += 1; // Skip the \n
if (strncasecmp(hdr, "transfer-encoding:", 18) == 0) {
const char *field = hdr + 18;
while (*field != '\n') {
if (memcmp(field, "chunked", 7) == 0) {
is_chunked = TRUE;
break;
}
field++;
}
}
if (strncasecmp(hdr, "Content-length:", 15) == 0) {
// There is a content-length header
const char *field = hdr + 15;
size_t extra = strtol(field + 1, 0, 10);
if (extra + (end_of_header - hrb->data) > hrb->length) {
return ERR_OK;
}
}
}
if (is_chunked) {
// More complex to determine if the whole body has arrived
// Format is one or more chunks each preceded by their length (in hex)
// A zero length chunk ends the body
const char *ptr = end_of_header;
bool seen_end = FALSE;
while (ptr < hrb->data + hrb->length && ptr > hrb->data) {
size_t chunk_len = strtol(ptr, 0, 16);
// Skip to end of chunk length (note that there can be parameters after the length)
ptr = strchr(ptr, '\n');
if (!ptr) {
// Don't have the entire chunk header
return ERR_OK;
}
ptr++;
ptr += chunk_len;
if (chunk_len == 0) {
seen_end = TRUE;
break;
}
if (ptr + 2 > hrb->data + hrb->length) {
// We don't have the CRLF yet
return ERR_OK;
}
if (memcmp(ptr, "\r\n", 2)) {
// Bail out here -- something bad happened
goto general_fail;
}
ptr += 2;
}
if (!seen_end) {
// Still waiting for the end chunk
return ERR_OK;
}
// Now rewrite the buffer to eliminate all the chunk headers
const char *src = end_of_header;
char *dst = end_of_header;
while (src < hrb->data + hrb->length && src > hrb->data) {
size_t chunk_len = strtol(src, 0, 16);
src = strchr(src, '\n');
src++;
if (chunk_len == 0) {
break;
}
memmove(dst, src, chunk_len);
dst += chunk_len;
src += chunk_len + 2;
}
*dst = '\0'; // Move the null termination down
hrb->length = dst - hrb->data; // Adjust the length down
}
err_t ret = ERR_OK;
char *data = hrb->data;
size_t data_len = hrb->length;
tcp_arg(http_client, 0); // Forget the data pointer.
#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)
{
goto general_fail;
}
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 *sl = malloc (sizeof (scan_listener_t));
if (!sl)
{
ENDUSER_SETUP_ERROR("out of memory", ENDUSER_SETUP_ERR_OUT_OF_MEMORY, ENDUSER_SETUP_ERR_NONFATAL);
}
sl->struct_type = SCAN_LISTENER_STRUCT_TYPE;
bool already = (state->scan_listeners != NULL);
tcp_arg (http_client, sl);
/* TODO: check if also need a tcp_err() cb, or if recv() is enough */
sl->conn = http_client;
sl->next = state->scan_listeners;
state->scan_listeners = sl;
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 (sl->conn);
sl->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 (hrb);
return ret;
general_fail:
ENDUSER_SETUP_ERROR("http_recvcb failed. Unable to send HTML.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_NONFATAL);
}
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_arg(pcb, 0); // Initialize to known value
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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