/*
* libwebsockets - lib/plat/lws-plat-esp32.c
*
* Copyright (C) 2010-2017 Andy Green <andy@warmcat.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation:
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#include "core/private.h"
#include "misc/romfs.h"
#include <esp_ota_ops.h>
#include <tcpip_adapter.h>
#include <esp_image_format.h>
#include <esp_task_wdt.h>
#include "soc/ledc_reg.h"
#include "driver/ledc.h"
struct lws_esp32 lws_esp32 = {
.model = CONFIG_LWS_MODEL_NAME,
.serial = "unknown",
};
/*
* Group AP / Station State
*/
enum lws_gapss {
LWS_GAPSS_INITIAL, /* just started up, init and move to
* LWS_GAPSS_SCAN */
LWS_GAPSS_SCAN, /*
* Unconnected, scanning: AP known in one of the
* config slots -> configure it, start timeout +
* LWS_GAPSS_STAT, if no AP already up in same
* group with lower MAC, after a random period
* start up our AP (LWS_GAPSS_AP)
*/
LWS_GAPSS_AP, /*
* Trying to be the group AP... periodically do
* a scan LWS_GAPSS_AP_SCAN, faster and then
* slower
*/
LWS_GAPSS_AP_SCAN, /*
* doing a scan while trying to be the group
* AP... if we see a lower MAC being the AP for
* the same group AP, abandon being an AP and
* join that AP as a station
*/
LWS_GAPSS_STAT_GRP_AP, /*
* We have decided to join another group member
* who is being the AP, as its MAC is lower than
* ours. This is a stable state, but we still
* do periodic scans LWS_GAPSS_STAT_GRP_AP_SCAN
* and will always prefer an AP configured in a
* slot.
*/
LWS_GAPSS_STAT_GRP_AP_SCAN,
/*
* We have joined a group member who is doing
* the AP job... we want to check every now and
* then if a configured AP has appeared that we
* should better use instead. Otherwise stay in
* LWS_GAPSS_STAT_GRP_AP
*/
LWS_GAPSS_STAT, /*
* trying to connect to another non-group AP.
* If we don't get an IP within a timeout and
* retries, blacklist it and go back
*/
LWS_GAPSS_STAT_HAPPY,
};
static const char *gapss_str[] = {
"LWS_GAPSS_INITIAL",
"LWS_GAPSS_SCAN",
"LWS_GAPSS_AP",
"LWS_GAPSS_AP_SCAN",
"LWS_GAPSS_STAT_GRP_AP",
"LWS_GAPSS_STAT_GRP_AP_SCAN",
"LWS_GAPSS_STAT",
"LWS_GAPSS_STAT_HAPPY",
};
static romfs_t lws_esp32_romfs;
static TimerHandle_t leds_timer, scan_timer, debounce_timer, association_timer
#if !defined(CONFIG_LWS_IS_FACTORY_APPLICATION)
, mdns_timer
#endif
;
static enum lws_gapss gapss = LWS_GAPSS_INITIAL;
#if !defined(CONFIG_LWS_IS_FACTORY_APPLICATION)
static mdns_result_t *mdns_results_head;
#endif
#define GPIO_SW 14
struct esp32_file {
const struct inode *i;
};
static void lws_gapss_to(enum lws_gapss to)
{
lwsl_notice("gapss from %s to %s\n", gapss_str[gapss], gapss_str[to]);
gapss = to;
}
uint32_t lws_esp32_get_reboot_type(void)
{
uint32_t *p = (uint32_t *)LWS_MAGIC_REBOOT_TYPE_ADS, val = *p;
nvs_handle nvh;
size_t s = 0;
int n = 0;
ESP_ERROR_CHECK(nvs_open("lws-station", NVS_READWRITE, &nvh));
if (nvs_get_blob(nvh, "ssl-pub.pem", NULL, &s) == ESP_OK)
n = 1;
if (nvs_get_blob(nvh, "ssl-pri.pem", NULL, &s) == ESP_OK)
n |= 2;
nvs_close(nvh);
/*
* in the case the SSL certs are not there, don't require
* the button to be down to access all features.
*/
if (n != 3)
val = LWS_MAGIC_REBOOT_TYPE_FORCED_FACTORY_BUTTON;
return val;
}
static void render_ip(char *dest, int len, uint8_t *ip)
{
snprintf(dest, len, "%u.%u.%u.%u", ip[0], ip[1], ip[2], ip[3]);
}
void lws_esp32_restart_guided(uint32_t type)
{
uint32_t *p_force_factory_magic = (uint32_t *)LWS_MAGIC_REBOOT_TYPE_ADS;
lwsl_notice("%s: %x\n", __func__, type);
*p_force_factory_magic = type;
esp_restart();
}
/*
* esp-idf goes crazy with zero length str nvs. Use this as a workaround
* to delete the key in that case.
*/
esp_err_t lws_nvs_set_str(nvs_handle handle, const char* key, const char* value)
{
if (*value)
return nvs_set_str(handle, key, value);
return nvs_erase_key(handle, key);
}
static wifi_scan_config_t scan_config = {
.ssid = 0,
.bssid = 0,
.channel = 0,
.show_hidden = true
};
static char scan_ongoing = 0, scan_timer_exists = 0;
static int try_slot = -1;
static wifi_config_t config = {
.ap = {
.channel = 6,
.authmode = WIFI_AUTH_OPEN,
.max_connection = 1,
} }, sta_config = {
.sta = {
.bssid_set = 0,
} };
static void lws_esp32_scan_timer_cb(TimerHandle_t th)
{
int n;
lwsl_notice("%s\n", __func__);
scan_ongoing = 0;
n = esp_wifi_scan_start(&scan_config, false);
if (n != ESP_OK)
lwsl_err("scan start failed %d\n", n);
}
static void lws_esp32_assoc_timer_cb(TimerHandle_t th)
{
int n;
xTimerStop(association_timer, 0);
if (gapss == LWS_GAPSS_STAT_HAPPY) {
lwsl_debug("%s: saw we were happy\n", __func__);
return;
}
lwsl_notice("%s: forcing rescan\n", __func__);
lws_gapss_to(LWS_GAPSS_SCAN);
scan_ongoing = 0;
n = esp_wifi_scan_start(&scan_config, false);
if (n != ESP_OK)
lwsl_err("scan start failed %d\n", n);
}
#if !defined(CONFIG_LWS_IS_FACTORY_APPLICATION)
void __attribute__(( weak ))
lws_group_member_event(int e, void *p)
{
}
void __attribute__(( weak ))
lws_get_iframe_size(int *w, int *h)
{
*w = 320;
*h = 160;
}
void lws_group_member_event_call(int e, void *p)
{
lws_group_member_event(e, p);
}
static int
get_txt_param(const mdns_result_t *mr, const char *param, char *result, int len)
{
const char *p;
*result = '\0';
p = strstr(mr->txt->key, param);
if (!p) {
*result = '\0';
return 1;
}
lws_strncpy(result, mr->txt->value, len);
return 0;
}
static void lws_esp32_mdns_timer_cb(TimerHandle_t th)
{
uint64_t now = lws_now_usecs();
struct lws_group_member *p, **p1;
const mdns_result_t *r = mdns_results_head;
while (r) {
char ch = 0, group[16];
get_txt_param(r, "group", group, sizeof(group));
if (strcmp(group, lws_esp32.group)) /* not our group */ {
lwsl_notice("group %s vs %s %s\n",
group, lws_esp32.group, r->txt->value);
continue;
}
p = lws_esp32.first;
while (p) {
if (strcmp(r->hostname, p->host))
goto next;
if (memcmp(&r->addr, &p->addr, sizeof(r->addr)))
goto next;
p->last_seen = now;
break;
next:
p = p->next;
}
if (!p) { /* did not find */
char temp[8];
p = lws_malloc(sizeof(*p), "group");
if (!p)
continue;
lws_strncpy(p->host, r->hostname, sizeof(p->host));
get_txt_param(r, "model", p->model, sizeof(p->model));
get_txt_param(r, "role", p->role, sizeof(p->role));
get_txt_param(r, "mac", p->mac, sizeof(p->mac));
get_txt_param(r, "width", temp, sizeof(temp));
p->width = atoi(temp);
get_txt_param(r, "height", temp, sizeof(temp));
p->height = atoi(temp);
memcpy(&p->addr, &r->addr, sizeof(p->addr));
// memcpy(&p->addrv6, &r->addrv6, sizeof(p->addrv6));
p->last_seen = now;
p->flags = 0;
p->next = lws_esp32.first;
lws_esp32.first = p;
lws_esp32.extant_group_members++;
lws_group_member_event_call(LWS_SYSTEM_GROUP_MEMBER_ADD, p);
} else {
if (memcmp(&p->addr, &r->addr, sizeof(p->addr))) {
memcpy(&p->addr, &r->addr, sizeof(p->addr));
ch = 1;
}
/* if (memcmp(&p->addrv6, &r->addrv6, sizeof(p->addrv6))) {
memcpy(&p->addrv6, &r->addrv6, sizeof(p->addrv6));
ch = 1;
} */
if (ch)
lws_group_member_event_call(LWS_SYSTEM_GROUP_MEMBER_CHANGE, p);
}
}
mdns_query_results_free(mdns_results_head);
/* garbage-collect group members not seen for too long */
p1 = &lws_esp32.first;
while (*p1) {
p = *p1;
if (!(p->flags & LWS_GROUP_FLAG_SELF) &&
now - p->last_seen > 60000000) {
lws_esp32.extant_group_members--;
*p1 = p->next;
lws_group_member_event_call(LWS_SYSTEM_GROUP_MEMBER_REMOVE, p);
lws_free(p);
continue;
}
p1 = &(*p1)->next;
}
mdns_query_txt(lws_esp32.group, "_lwsgrmem", "_tcp", 0,
&mdns_results_head);
xTimerStart(mdns_timer, 0);
}
#endif
void __attribute__(( weak ))
lws_esp32_button(int down)
{
}
void IRAM_ATTR
gpio_irq(void *arg)
{
gpio_set_intr_type(GPIO_SW, GPIO_INTR_DISABLE);
xTimerStart(debounce_timer, 0);
}
static void lws_esp32_debounce_timer_cb(TimerHandle_t th)
{
if (lws_esp32.button_is_down)
gpio_set_intr_type(GPIO_SW, GPIO_INTR_POSEDGE);
else
gpio_set_intr_type(GPIO_SW, GPIO_INTR_NEGEDGE);
lws_esp32.button_is_down = gpio_get_level(GPIO_SW);
lws_esp32_button(lws_esp32.button_is_down);
}
static int
start_scan()
{
/* if no APs configured, no point... */
if (!lws_esp32.ssid[0][0] &&
!lws_esp32.ssid[1][0] &&
!lws_esp32.ssid[2][0] &&
!lws_esp32.ssid[3][0])
return 0;
if (scan_timer_exists && !scan_ongoing) {
// lwsl_notice("Starting scan timer...\n");
scan_ongoing = 1;
xTimerStart(scan_timer, 0);
}
return 0;
}
static void
end_scan()
{
wifi_ap_record_t ap_records[10];
uint16_t count_ap_records;
int n, m;
count_ap_records = LWS_ARRAY_SIZE(ap_records);
if (esp_wifi_scan_get_ap_records(&count_ap_records, ap_records)) {
lwsl_err("%s: failed\n", __func__);
return;
}
if (!count_ap_records)
goto passthru;
if (gapss != LWS_GAPSS_SCAN) {
lwsl_info("ignoring scan as gapss %s\n", gapss_str[gapss]);
goto passthru;
}
/* no point if no APs set up */
if (!lws_esp32.ssid[0][0] &&
!lws_esp32.ssid[1][0] &&
!lws_esp32.ssid[2][0] &&
!lws_esp32.ssid[3][0])
goto passthru;
lwsl_info("checking %d scan records\n", count_ap_records);
for (n = 0; n < 4; n++) {
if (!lws_esp32.ssid[(n + try_slot + 1) & 3][0])
continue;
lwsl_debug("looking for %s\n",
lws_esp32.ssid[(n + try_slot + 1) & 3]);
/* this ssid appears in scan results? */
for (m = 0; m < count_ap_records; m++) {
// lwsl_notice(" %s\n", ap_records[m].ssid);
if (!strcmp((char *)ap_records[m].ssid,
lws_esp32.ssid[(n + try_slot + 1) & 3]))
goto hit;
}
continue;
hit:
m = (n + try_slot + 1) & 3;
try_slot = m;
lwsl_info("Attempting connection with slot %d: %s:\n", m,
lws_esp32.ssid[m]);
/* set the ssid we last tried to connect to */
lws_strncpy(lws_esp32.active_ssid, lws_esp32.ssid[m],
sizeof(lws_esp32.active_ssid));
lws_strncpy((char *)sta_config.sta.ssid, lws_esp32.ssid[m],
sizeof(sta_config.sta.ssid));
lws_strncpy((char *)sta_config.sta.password, lws_esp32.password[m],
sizeof(sta_config.sta.password));
tcpip_adapter_set_hostname(TCPIP_ADAPTER_IF_STA,
(const char *)&config.ap.ssid[7]);
lws_gapss_to(LWS_GAPSS_STAT);
xTimerStop(association_timer, 0);
xTimerStart(association_timer, 0);
esp_wifi_set_config(WIFI_IF_STA, &sta_config);
esp_wifi_connect();
break;
}
if (n == 4)
start_scan();
passthru:
if (lws_esp32.scan_consumer)
lws_esp32.scan_consumer(count_ap_records, ap_records,
lws_esp32.scan_consumer_arg);
}
static void
lws_set_genled(int n)
{
lws_esp32.genled_t = lws_now_usecs();
lws_esp32.genled = n;
}
int
lws_esp32_leds_network_indication(void)
{
uint64_t us, r;
int n, fadein = 100, speed = 1199, div = 1, base = 0;
r = lws_now_usecs();
us = r - lws_esp32.genled_t;
switch (lws_esp32.genled) {
case LWSESP32_GENLED__INIT:
lws_esp32.genled = LWSESP32_GENLED__LOST_NETWORK;
/* fallthru */
case LWSESP32_GENLED__LOST_NETWORK:
fadein = us / 10000; /* 100 steps in 1s */
if (fadein > 100) {
fadein = 100;
lws_esp32.genled = LWSESP32_GENLED__NO_NETWORK;
}
/* fallthru */
case LWSESP32_GENLED__NO_NETWORK:
break;
case LWSESP32_GENLED__CONN_AP:
base = 4096;
speed = 933;
div = 2;
break;
case LWSESP32_GENLED__GOT_IP:
fadein = us / 10000; /* 100 steps in 1s */
if (fadein > 100) {
fadein = 100;
lws_esp32.genled = LWSESP32_GENLED__OK;
}
fadein = 100 - fadein; /* we are fading out */
/* fallthru */
case LWSESP32_GENLED__OK:
if (lws_esp32.genled == LWSESP32_GENLED__OK)
return 0;
base = 4096;
speed = 766;
div = 3;
break;
}
n = base + (lws_esp32_sine_interp(r / speed) / div);
return (n * fadein) / 100;
}
esp_err_t lws_esp32_event_passthru(void *ctx, system_event_t *event)
{
#if !defined(CONFIG_LWS_IS_FACTORY_APPLICATION)
struct lws_group_member *mem;
int n;
#endif
nvs_handle nvh;
uint32_t use;
switch((int)event->event_id) {
case SYSTEM_EVENT_STA_START:
//esp_wifi_connect();
// break;
/* fallthru */
case SYSTEM_EVENT_STA_DISCONNECTED:
lwsl_notice("SYSTEM_EVENT_STA_DISCONNECTED\n");
if (sntp_enabled())
sntp_stop();
lws_esp32.conn_ap = 0;
lws_esp32.inet = 0;
lws_esp32.sta_ip[0] = '\0';
lws_esp32.sta_mask[0] = '\0';
lws_esp32.sta_gw[0] = '\0';
lws_gapss_to(LWS_GAPSS_SCAN);
mdns_free();
lws_set_genled(LWSESP32_GENLED__LOST_NETWORK);
start_scan();
esp_wifi_connect();
break;
case SYSTEM_EVENT_STA_CONNECTED:
lws_esp32.conn_ap = 1;
lws_set_genled(LWSESP32_GENLED__CONN_AP);
break;
case SYSTEM_EVENT_STA_GOT_IP:
lwsl_notice("SYSTEM_EVENT_STA_GOT_IP\n");
lws_esp32.inet = 1;
lws_set_genled(LWSESP32_GENLED__GOT_IP);
render_ip(lws_esp32.sta_ip, sizeof(lws_esp32.sta_ip) - 1,
(uint8_t *)&event->event_info.got_ip.ip_info.ip);
render_ip(lws_esp32.sta_mask, sizeof(lws_esp32.sta_mask) - 1,
(uint8_t *)&event->event_info.got_ip.ip_info.netmask);
render_ip(lws_esp32.sta_gw, sizeof(lws_esp32.sta_gw) - 1,
(uint8_t *)&event->event_info.got_ip.ip_info.gw);
if (!nvs_open("lws-station", NVS_READWRITE, &nvh)) {
char slot[8];
lws_snprintf(slot, sizeof(slot) - 1, "%duse", try_slot);
use = 0;
nvs_get_u32(nvh, slot, &use);
nvs_set_u32(nvh, slot, use + 1);
nvs_commit(nvh);
nvs_close(nvh);
}
lws_gapss_to(LWS_GAPSS_STAT_HAPPY);
#if !defined(CONFIG_LWS_IS_FACTORY_APPLICATION)
n = mdns_init();
if (!n) {
static mdns_txt_item_t txta[6];
static char wh[2][6];
int w, h;
mdns_hostname_set(lws_esp32.hostname);
mdns_instance_name_set(lws_esp32.group);
lws_get_iframe_size(&w, &h);
txta[0].key = "model";
txta[1].key = "group";
txta[2].key = "role";
txta[3].key = "mac";
txta[4].key = "width";
txta[5].key = "height";
txta[0].value = lws_esp32.model;
txta[1].value = lws_esp32.group;
txta[2].value = lws_esp32.role;
txta[3].value = lws_esp32.mac;
txta[4].value = wh[0];
txta[5].value = wh[1];
lws_snprintf(wh[0], 6, "%d", w);
lws_snprintf(wh[1], 6, "%d", h);
mdns_service_add(lws_esp32.group,
"_lwsgrmem", "_tcp", 443, txta,
LWS_ARRAY_SIZE(txta));
mem = lws_esp32.first;
while (mem) {
if (mem->flags & 1)
break;
mem = mem->next;
}
if (!mem) {
struct lws_group_member *mem =
lws_malloc(sizeof(*mem), "group");
if (mem) {
mem->last_seen = ~(uint64_t)0;
strcpy(mem->model, lws_esp32.model);
strcpy(mem->role, lws_esp32.role);
strcpy(mem->host, lws_esp32.hostname);
strcpy(mem->mac, lws_esp32.mac);
mem->flags = LWS_GROUP_FLAG_SELF;
lws_get_iframe_size(&mem->width,
&mem->height);
memcpy(&mem->addr,
&event->event_info.got_ip.ip_info.ip,
sizeof(mem->addr));
memcpy(&mem->addrv6,
&event->event_info.got_ip6.ip6_info.ip,
sizeof(mem->addrv6));
mem->next = lws_esp32.first;
lws_esp32.first = mem;
lws_esp32.extant_group_members++;
lws_group_member_event_call(
LWS_SYSTEM_GROUP_MEMBER_ADD, mem);
}
} else { /* update our IP */
memcpy(&mem->addr,
&event->event_info.got_ip.ip_info.ip,
sizeof(mem->addr));
memcpy(&mem->addrv6,
&event->event_info.got_ip6.ip6_info.ip,
sizeof(mem->addrv6));
lws_group_member_event_call(
LWS_SYSTEM_GROUP_MEMBER_CHANGE, mem);
}
} else
lwsl_err("unable to init mdns on STA: %d\n", n);
mdns_query_txt(lws_esp32.group, "_lwsgrmem", "_tcp", 0,
&mdns_results_head);
xTimerStart(mdns_timer, 0);
#endif
lwsl_notice(" --- Got IP %s\n", lws_esp32.sta_ip);
if (!sntp_enabled()) {
sntp_setoperatingmode(SNTP_OPMODE_POLL);
sntp_setservername(0, "pool.ntp.org");
sntp_init();
}
break;
case SYSTEM_EVENT_SCAN_DONE:
lwsl_notice("SYSTEM_EVENT_SCAN_DONE\n");
end_scan();
break;
default:
break;
}
return ESP_OK;
}
static lws_fop_fd_t IRAM_ATTR
esp32_lws_fops_open(const struct lws_plat_file_ops *fops, const char *filename,
const char *vfs_path, lws_fop_flags_t *flags)
{
struct esp32_file *f = malloc(sizeof(*f));
lws_fop_fd_t fop_fd;
size_t len, csum;
lwsl_notice("%s: %s\n", __func__, filename);
if (!f)
return NULL;
f->i = romfs_get_info(lws_esp32_romfs, filename, &len, &csum);
if (!f->i)
goto bail;
fop_fd = malloc(sizeof(*fop_fd));
if (!fop_fd)
goto bail;
fop_fd->fops = fops;
fop_fd->filesystem_priv = f;
fop_fd->mod_time = csum;
*flags |= LWS_FOP_FLAG_MOD_TIME_VALID;
fop_fd->flags = *flags;
fop_fd->len = len;
fop_fd->pos = 0;
return fop_fd;
bail:
free(f);
return NULL;
}
static int IRAM_ATTR
esp32_lws_fops_close(lws_fop_fd_t *fop_fd)
{
free((*fop_fd)->filesystem_priv);
free(*fop_fd);
*fop_fd = NULL;
return 0;
}
static lws_fileofs_t IRAM_ATTR
esp32_lws_fops_seek_cur(lws_fop_fd_t fop_fd, lws_fileofs_t offset_from_cur_pos)
{
fop_fd->pos += offset_from_cur_pos;
if (fop_fd->pos > fop_fd->len)
fop_fd->pos = fop_fd->len;
return 0;
}
static int IRAM_ATTR
esp32_lws_fops_read(lws_fop_fd_t fop_fd, lws_filepos_t *amount, uint8_t *buf,
lws_filepos_t len)
{
struct esp32_file *f = fop_fd->filesystem_priv;
#if 0
if ((long)buf & 3) {
lwsl_err("misaligned buf\n");
return -1;
}
#endif
if (fop_fd->pos >= fop_fd->len)
return 0;
if (len > fop_fd->len - fop_fd->pos)
len = fop_fd->len - fop_fd->pos;
spi_flash_read((uint32_t)(char *)f->i + fop_fd->pos, buf, len);
*amount = len;
fop_fd->pos += len;
return 0;
}
static const struct lws_plat_file_ops fops = {
.next = &fops_zip,
.LWS_FOP_OPEN = esp32_lws_fops_open,
.LWS_FOP_CLOSE = esp32_lws_fops_close,
.LWS_FOP_READ = esp32_lws_fops_read,
.LWS_FOP_SEEK_CUR = esp32_lws_fops_seek_cur,
};
int
lws_esp32_wlan_nvs_get(int retry)
{
nvs_handle nvh;
char lws_esp32_force_ap = 0, slot[12];
size_t s;
uint8_t mac[6];
int n;
esp_efuse_mac_get_default(mac);
mac[5] |= 1; /* match the AP MAC */
snprintf(lws_esp32.serial, sizeof(lws_esp32.serial) - 1,
"%02X%02X%02X", mac[3], mac[4], mac[5]);
snprintf(lws_esp32.mac, sizeof(lws_esp32.mac) - 1,
"%02X%02X%02X%02X%02X%02X", mac[0], mac[1], mac[2], mac[3],
mac[4], mac[5]);
ESP_ERROR_CHECK(nvs_open("lws-station", NVS_READWRITE, &nvh));
config.sta.ssid[0] = '\0';
config.sta.password[0] = '\0';
for (n = 0; n < 4; n++) {
lws_snprintf(slot, sizeof(slot) - 1, "%dssid", n);
s = sizeof(lws_esp32.ssid[0]) - 1;
lws_esp32.ssid[n][0] = '\0';
nvs_get_str(nvh, slot, lws_esp32.ssid[n], &s);
lws_snprintf(slot, sizeof(slot) - 1, "%dpassword", n);
s = sizeof(lws_esp32.password[0]) - 1;
lws_esp32.password[n][0] = '\0';
nvs_get_str(nvh, slot, lws_esp32.password[n], &s);
}
s = sizeof(lws_esp32.serial) - 1;
if (nvs_get_str(nvh, "serial", lws_esp32.serial, &s) != ESP_OK)
lws_esp32_force_ap = 1;
else
snprintf((char *)config.ap.ssid, sizeof(config.ap.ssid) - 1,
"config-%s-%s", lws_esp32.model, lws_esp32.serial);
s = sizeof(lws_esp32.opts) - 1;
if (nvs_get_str(nvh, "opts", lws_esp32.opts, &s) != ESP_OK)
lws_esp32_force_ap = 1;
lws_esp32.access_pw[0] = '\0';
nvs_get_str(nvh, "access_pw", lws_esp32.access_pw, &s);
lws_esp32.group[0] = '\0';
s = sizeof(lws_esp32.group);
nvs_get_str(nvh, "group", lws_esp32.group, &s);
lws_esp32.role[0] = '\0';
s = sizeof(lws_esp32.role);
nvs_get_str(nvh, "role", lws_esp32.role, &s);
/* if group and role defined: group-role */
if (lws_esp32.group[0] && lws_esp32.role[0])
lws_snprintf(lws_esp32.hostname, sizeof(lws_esp32.hostname) - 1,
"%s-%s", lws_esp32.group, lws_esp32.role);
else /* otherwise model-serial */
lws_snprintf(lws_esp32.hostname, sizeof(lws_esp32.hostname) - 1,
"%s-%s", lws_esp32.model, lws_esp32.serial);
nvs_close(nvh);
lws_gapss_to(LWS_GAPSS_SCAN);
start_scan();
return lws_esp32_force_ap;
}
void
lws_esp32_wlan_config(void)
{
ledc_timer_config_t ledc_timer = {
.bit_num = LEDC_TIMER_13_BIT,
.freq_hz = 5000,
.speed_mode = LEDC_HIGH_SPEED_MODE,
.timer_num = LEDC_TIMER_0
};
int n;
lwsl_debug("%s\n", __func__);
ledc_timer_config(&ledc_timer);
lws_set_genled(LWSESP32_GENLED__INIT);
/* user code needs to provide lws_esp32_leds_timer_cb */
leds_timer = xTimerCreate("lws_leds", pdMS_TO_TICKS(25), 1, NULL,
(TimerCallbackFunction_t)lws_esp32_leds_timer_cb);
scan_timer = xTimerCreate("lws_scan", pdMS_TO_TICKS(10000), 0, NULL,
(TimerCallbackFunction_t)lws_esp32_scan_timer_cb);
debounce_timer = xTimerCreate("lws_db", pdMS_TO_TICKS(100), 0, NULL,
(TimerCallbackFunction_t)lws_esp32_debounce_timer_cb);
association_timer = xTimerCreate("lws_assoc", pdMS_TO_TICKS(10000), 0, NULL,
(TimerCallbackFunction_t)lws_esp32_assoc_timer_cb);
#if !defined(CONFIG_LWS_IS_FACTORY_APPLICATION)
mdns_timer = xTimerCreate("lws_mdns", pdMS_TO_TICKS(5000), 0, NULL,
(TimerCallbackFunction_t)lws_esp32_mdns_timer_cb);
#endif
scan_timer_exists = 1;
xTimerStart(leds_timer, 0);
*(volatile uint32_t *)PERIPHS_IO_MUX_MTMS_U = FUNC_MTMS_GPIO14;
gpio_output_set(0, 0, 0, (1 << GPIO_SW));
n = gpio_install_isr_service(0);
if (!n) {
gpio_config_t c;
c.intr_type = GPIO_INTR_NEGEDGE;
c.mode = GPIO_MODE_INPUT;
c.pin_bit_mask = 1 << GPIO_SW;
c.pull_down_en = 0;
c.pull_up_en = 0;
gpio_config(&c);
if (gpio_isr_handler_add(GPIO_SW, gpio_irq, NULL))
lwsl_notice("isr handler add for 14 failed\n");
} else
lwsl_notice("failed to install gpio isr service: %d\n", n);
lws_esp32_wlan_nvs_get(0);
tcpip_adapter_init();
}
void
lws_esp32_wlan_start_ap(void)
{
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
ESP_ERROR_CHECK( esp_wifi_init(&cfg));
ESP_ERROR_CHECK( esp_wifi_set_storage(WIFI_STORAGE_RAM));
ESP_ERROR_CHECK( esp_wifi_set_mode(WIFI_MODE_APSTA) );
ESP_ERROR_CHECK( esp_wifi_set_config(WIFI_IF_AP, &config) );
ESP_ERROR_CHECK( esp_wifi_set_config(WIFI_IF_STA, &sta_config));
ESP_ERROR_CHECK( esp_wifi_start());
esp_wifi_scan_start(&scan_config, false);
if (sta_config.sta.ssid[0]) {
tcpip_adapter_set_hostname(TCPIP_ADAPTER_IF_STA,
(const char *)&config.ap.ssid[7]);
// esp_wifi_set_auto_connect(1);
ESP_ERROR_CHECK( esp_wifi_connect());
ESP_ERROR_CHECK( esp_wifi_set_config(WIFI_IF_STA, &sta_config));
ESP_ERROR_CHECK( esp_wifi_connect());
}
}
void
lws_esp32_wlan_start_station(void)
{
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
ESP_ERROR_CHECK( esp_wifi_init(&cfg));
ESP_ERROR_CHECK( esp_wifi_set_storage(WIFI_STORAGE_RAM));
ESP_ERROR_CHECK( esp_wifi_set_mode(WIFI_MODE_STA));
ESP_ERROR_CHECK( esp_wifi_set_config(WIFI_IF_STA, &sta_config));
ESP_ERROR_CHECK( esp_wifi_start());
tcpip_adapter_set_hostname(TCPIP_ADAPTER_IF_STA,
(const char *)&config.ap.ssid[7]);
//esp_wifi_set_auto_connect(1);
//ESP_ERROR_CHECK( esp_wifi_connect());
lws_esp32_scan_timer_cb(NULL);
}
const esp_partition_t *
lws_esp_ota_get_boot_partition(void)
{
const esp_partition_t *part = esp_ota_get_boot_partition(),
*factory_part, *ota;
esp_image_header_t eih, ota_eih;
uint32_t *p_force_factory_magic = (uint32_t *)LWS_MAGIC_REBOOT_TYPE_ADS;
/* confirm what we are told is the boot part is sane */
spi_flash_read(part->address , &eih, sizeof(eih));
factory_part = esp_partition_find_first(ESP_PARTITION_TYPE_APP,
ESP_PARTITION_SUBTYPE_APP_FACTORY, NULL);
ota = esp_partition_find_first(ESP_PARTITION_TYPE_APP,
ESP_PARTITION_SUBTYPE_APP_OTA_0, NULL);
spi_flash_read(ota->address , &ota_eih, sizeof(ota_eih));
if (eih.spi_mode == 0xff ||
*p_force_factory_magic == LWS_MAGIC_REBOOT_TYPE_FORCED_FACTORY ||
*p_force_factory_magic == LWS_MAGIC_REBOOT_TYPE_FORCED_FACTORY_BUTTON
) {
/*
* we believed we were going to boot OTA, but we fell
* back to FACTORY in the bootloader when we saw it
* had been erased. esp_ota_get_boot_partition() still
* says the OTA partition then even if we are in the
* factory partition right now.
*/
part = factory_part;
}
#ifdef CONFIG_LWS_IS_FACTORY_APPLICATION
else
if (ota_eih.spi_mode != 0xff &&
part->address != factory_part->address) {
uint8_t buf[4096];
uint32_t n;
/*
* we are a FACTORY image running in an OTA slot...
* it means we were just written and need to copy
* ourselves into the FACTORY slot.
*/
lwsl_notice("Copying FACTORY update into place "
"0x%x len 0x%x\n", factory_part->address,
factory_part->size);
esp_task_wdt_reset();
if (spi_flash_erase_range(factory_part->address,
factory_part->size)) {
lwsl_err("spi: Failed to erase\n");
goto retry;
}
for (n = 0; n < factory_part->size; n += sizeof(buf)) {
esp_task_wdt_reset();
spi_flash_read(part->address + n , buf,
sizeof(buf));
if (spi_flash_write(factory_part->address + n,
buf, sizeof(buf))) {
lwsl_err("spi: Failed to write\n");
goto retry;
}
}
/*
* We send a message to the bootloader to erase the OTA header, we will come back up in
* factory where the user can reload the OTA image
*/
lwsl_notice(" FACTORY copy successful, rebooting\n");
lws_esp32_restart_guided(LWS_MAGIC_REBOOT_TYPE_REQ_FACTORY_ERASE_OTA);
retry:
esp_restart();
}
#endif
return part;
}
void
lws_esp32_set_creation_defaults(struct lws_context_creation_info *info)
{
const esp_partition_t *part;
memset(info, 0, sizeof(*info));
lws_set_log_level(63, lwsl_emit_syslog);
part = lws_esp_ota_get_boot_partition();
(void)part;
info->vhost_name = "default";
info->port = 443;
info->fd_limit_per_thread = 16;
info->max_http_header_pool = 5;
info->max_http_header_data = 1024;
info->pt_serv_buf_size = 4096;
info->keepalive_timeout = 30;
info->timeout_secs = 30;
info->simultaneous_ssl_restriction = 2;
info->options = LWS_SERVER_OPTION_EXPLICIT_VHOSTS |
LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT;
}
int
lws_esp32_get_image_info(const esp_partition_t *part, struct lws_esp32_image *i,
char *json, int json_len)
{
esp_image_segment_header_t eis;
esp_image_header_t eih;
uint32_t hdr;
spi_flash_read(part->address , &eih, sizeof(eih));
hdr = part->address + sizeof(eih);
if (eih.magic != ESP_IMAGE_HEADER_MAGIC) {
lwsl_notice("%s: bad image header magic\n", __func__);
return 1;
}
eis.data_len = 0;
while (eih.segment_count-- && eis.data_len != 0xffffffff) {
spi_flash_read(hdr, &eis, sizeof(eis));
hdr += sizeof(eis) + eis.data_len;
}
hdr += (~hdr & 15) + 1;
if (eih.hash_appended)
hdr += 0x20;
// lwsl_notice("romfs estimated at 0x%x\n", hdr);
i->romfs = hdr + 0x4;
spi_flash_read(hdr, &i->romfs_len, sizeof(i->romfs_len));
i->json = i->romfs + i->romfs_len + 4;
spi_flash_read(i->json - 4, &i->json_len, sizeof(i->json_len));
if (i->json_len < json_len - 1)
json_len = i->json_len;
spi_flash_read(i->json, json, json_len);
json[json_len] = '\0';
return 0;
}
static int
_rngf(void *context, unsigned char *buf, size_t len)
{
if ((size_t)lws_get_random(context, buf, len) == len)
return 0;
return -1;
}
int
lws_esp32_selfsigned(struct lws_vhost *vhost)
{
mbedtls_x509write_cert crt;
char subject[200];
mbedtls_pk_context mpk;
int buf_size = 4096, n;
uint8_t *buf = malloc(buf_size); /* malloc because given to user code */
mbedtls_mpi mpi;
nvs_handle nvh;
size_t s;
lwsl_notice("%s: %s\n", __func__, vhost->name);
if (!buf)
return -1;
if (nvs_open("lws-station", NVS_READWRITE, &nvh)) {
lwsl_notice("%s: can't open nvs\n", __func__);
free(buf);
return 1;
}
n = 0;
if (!nvs_get_blob(nvh, vhost->tls.alloc_cert_path, NULL, &s))
n |= 1;
if (!nvs_get_blob(nvh, vhost->tls.key_path, NULL, &s))
n |= 2;
nvs_close(nvh);
if (n == 3) {
lwsl_notice("%s: certs exist\n", __func__);
free(buf);
return 0; /* certs already exist */
}
lwsl_notice("%s: creating selfsigned initial certs\n", __func__);
mbedtls_x509write_crt_init(&crt);
mbedtls_pk_init(&mpk);
if (mbedtls_pk_setup(&mpk, mbedtls_pk_info_from_type(MBEDTLS_PK_RSA))) {
lwsl_notice("%s: pk_setup failed\n", __func__);
goto fail;
}
lwsl_notice("%s: generating 2048-bit RSA keypair... "
"this may take a minute or so...\n", __func__);
n = mbedtls_rsa_gen_key(mbedtls_pk_rsa(mpk), _rngf, vhost->context,
2048, 65537);
if (n) {
lwsl_notice("%s: failed to generate keys\n", __func__);
goto fail1;
}
lwsl_notice("%s: keys done\n", __func__);
/* subject must be formatted like "C=TW,O=warmcat,CN=myserver" */
lws_snprintf(subject, sizeof(subject) - 1,
"C=TW,ST=New Taipei City,L=Taipei,O=warmcat,CN=%s",
lws_esp32.hostname);
if (mbedtls_x509write_crt_set_subject_name(&crt, subject)) {
lwsl_notice("set SN failed\n");
goto fail1;
}
mbedtls_x509write_crt_set_subject_key(&crt, &mpk);
if (mbedtls_x509write_crt_set_issuer_name(&crt, subject)) {
lwsl_notice("set IN failed\n");
goto fail1;
}
mbedtls_x509write_crt_set_issuer_key(&crt, &mpk);
lws_get_random(vhost->context, &n, sizeof(n));
lws_snprintf(subject, sizeof(subject), "%d", n);
mbedtls_mpi_init(&mpi);
mbedtls_mpi_read_string(&mpi, 10, subject);
mbedtls_x509write_crt_set_serial(&crt, &mpi);
mbedtls_mpi_free(&mpi);
mbedtls_x509write_crt_set_validity(&crt, "20171105235959",
"20491231235959");
mbedtls_x509write_crt_set_key_usage(&crt,
MBEDTLS_X509_KU_DIGITAL_SIGNATURE |
MBEDTLS_X509_KU_KEY_ENCIPHERMENT);
mbedtls_x509write_crt_set_md_alg(&crt, MBEDTLS_MD_SHA256);
n = mbedtls_x509write_crt_pem(&crt, buf, buf_size, _rngf,
vhost->context);
if (n < 0) {
lwsl_notice("%s: write crt der failed\n", __func__);
goto fail1;
}
lws_plat_write_cert(vhost, 0, 0, buf, strlen((const char *)buf));
if (mbedtls_pk_write_key_pem(&mpk, buf, buf_size)) {
lwsl_notice("write key pem failed\n");
goto fail1;
}
lws_plat_write_cert(vhost, 1, 0, buf, strlen((const char *)buf));
mbedtls_pk_free(&mpk);
mbedtls_x509write_crt_free(&crt);
lwsl_notice("%s: cert creation complete\n", __func__);
return n;
fail1:
mbedtls_pk_free(&mpk);
fail:
mbedtls_x509write_crt_free(&crt);
free(buf);
nvs_close(nvh);
return -1;
}
void
lws_esp32_update_acme_info(void)
{
int n;
n = lws_plat_read_file("acme-email", lws_esp32.le_email,
sizeof(lws_esp32.le_email) - 1);
if (n >= 0)
lws_esp32.le_email[n] = '\0';
n = lws_plat_read_file("acme-cn", lws_esp32.le_dns,
sizeof(lws_esp32.le_dns) - 1);
if (n >= 0)
lws_esp32.le_dns[n] = '\0';
}
struct lws_context *
lws_esp32_init(struct lws_context_creation_info *info, struct lws_vhost **pvh)
{
const esp_partition_t *part = lws_esp_ota_get_boot_partition();
struct lws_context *context;
struct lws_esp32_image i;
struct lws_vhost *vhost;
struct lws wsi;
char buf[512];
context = lws_create_context(info);
if (context == NULL) {
lwsl_err("Failed to create context\n");
return NULL;
}
lws_esp32_get_image_info(part, &i, buf, sizeof(buf) - 1);
lws_esp32_romfs = (romfs_t)i.romfs;
if (!romfs_mount_check(lws_esp32_romfs)) {
lwsl_err("mount error on ROMFS at %p 0x%x\n", lws_esp32_romfs,
i.romfs);
return NULL;
}
lwsl_notice("ROMFS length %uKiB\n", i.romfs_len >> 10);
puts(buf);
/* set the lws vfs to use our romfs */
lws_set_fops(context, &fops);
info->options |= LWS_SERVER_OPTION_CREATE_VHOST_SSL_CTX |
LWS_SERVER_OPTION_IGNORE_MISSING_CERT;
vhost = lws_create_vhost(context, info);
if (!vhost) {
lwsl_err("Failed to create vhost\n");
return NULL;
}
lws_esp32_update_acme_info();
lws_esp32_selfsigned(vhost);
wsi.context = vhost->context;
wsi.vhost = vhost;
lws_tls_server_certs_load(vhost, &wsi, info->ssl_cert_filepath,
info->ssl_private_key_filepath, NULL, 0, NULL, 0);
lws_init_vhost_client_ssl(info, vhost);
if (pvh)
*pvh = vhost;
if (lws_protocol_init(context))
return NULL;
return context;
}
static const uint16_t sineq16[] = {
0x0000, 0x0191, 0x031e, 0x04a4, 0x061e, 0x0789, 0x08e2, 0x0a24,
0x0b4e, 0x0c5c, 0x0d4b, 0x0e1a, 0x0ec6, 0x0f4d, 0x0faf, 0x0fea,
};
static uint16_t sine_lu(int n)
{
switch ((n >> 4) & 3) {
case 1:
return 4096 + sineq16[n & 15];
case 2:
return 4096 + sineq16[15 - (n & 15)];
case 3:
return 4096 - sineq16[n & 15];
default:
return 4096 - sineq16[15 - (n & 15)];
}
}
/* useful for sine led fade patterns */
uint16_t lws_esp32_sine_interp(int n)
{
/*
* 2: quadrant
* 4: table entry in quadrant
* 4: interp (LSB)
*
* total 10 bits / 1024 steps per cycle
*
* + 0: 0
* + 256: 4096
* + 512: 8192
* + 768: 4096
* +1023: 0
*/
return (sine_lu(n >> 4) * (15 - (n & 15)) +
sine_lu((n >> 4) + 1) * (n & 15)) / 15;
}