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libwebsockets/lib/lws-plat-esp32.c
Andy Green b2f8bc5638 esp32: multi ap slots
2017-05-13 10:26:59 +08:00

1363 lines
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/*
* libwebsockets - small server side websockets and web server implementation
*
* 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 "private-libwebsockets.h"
#include "freertos/timers.h"
#include <esp_attr.h>
#include <esp_system.h>
/*
* included from libwebsockets.c for unix builds
*/
unsigned long long time_in_microseconds(void)
{
struct timeval tv;
gettimeofday(&tv, NULL);
return ((unsigned long long)tv.tv_sec * 1000000LL) + tv.tv_usec;
}
LWS_VISIBLE int
lws_get_random(struct lws_context *context, void *buf, int len)
{
uint8_t *pb = buf;
while (len) {
uint32_t r = esp_random();
uint8_t *p = (uint8_t *)&r;
int b = 4;
if (len < b)
b = len;
len -= b;
while (b--)
*pb++ = p[b];
}
return pb - (uint8_t *)buf;
}
LWS_VISIBLE int
lws_send_pipe_choked(struct lws *wsi)
{
fd_set writefds;
struct timeval tv = { 0, 0 };
/* treat the fact we got a truncated send pending as if we're choked */
if (wsi->trunc_len)
return 1;
FD_ZERO(&writefds);
FD_SET(wsi->desc.sockfd, &writefds);
if (select(wsi->desc.sockfd + 1, NULL, &writefds, NULL, &tv) < 1)
return 1;
return 0;
}
LWS_VISIBLE int
lws_poll_listen_fd(struct lws_pollfd *fd)
{
fd_set readfds;
struct timeval tv = { 0, 0 };
FD_ZERO(&readfds);
FD_SET(fd->fd, &readfds);
return select(fd->fd + 1, &readfds, NULL, NULL, &tv);
}
LWS_VISIBLE void
lws_cancel_service_pt(struct lws *wsi)
{
}
LWS_VISIBLE void
lws_cancel_service(struct lws_context *context)
{
}
LWS_VISIBLE void lwsl_emit_syslog(int level, const char *line)
{
printf("%d: %s", level, line);
}
LWS_VISIBLE LWS_EXTERN int
_lws_plat_service_tsi(struct lws_context *context, int timeout_ms, int tsi)
{
struct lws_context_per_thread *pt;
int n = -1, m, c;
/* stay dead once we are dead */
if (!context || !context->vhost_list)
return 1;
pt = &context->pt[tsi];
lws_stats_atomic_bump(context, pt, LWSSTATS_C_SERVICE_ENTRY, 1);
if (timeout_ms < 0)
goto faked_service;
if (!context->service_tid_detected) {
struct lws _lws;
memset(&_lws, 0, sizeof(_lws));
_lws.context = context;
context->service_tid_detected =
context->vhost_list->protocols[0].callback(
&_lws, LWS_CALLBACK_GET_THREAD_ID, NULL, NULL, 0);
}
context->service_tid = context->service_tid_detected;
/*
* is there anybody with pending stuff that needs service forcing?
*/
if (!lws_service_adjust_timeout(context, 1, tsi)) {
/* -1 timeout means just do forced service */
_lws_plat_service_tsi(context, -1, pt->tid);
/* still somebody left who wants forced service? */
if (!lws_service_adjust_timeout(context, 1, pt->tid))
/* yes... come back again quickly */
timeout_ms = 0;
}
// n = poll(pt->fds, pt->fds_count, timeout_ms);
{
fd_set readfds, writefds, errfds;
struct timeval tv = { timeout_ms / 1000,
(timeout_ms % 1000) * 1000 }, *ptv = &tv;
int max_fd = 0;
FD_ZERO(&readfds);
FD_ZERO(&writefds);
FD_ZERO(&errfds);
for (n = 0; n < pt->fds_count; n++) {
pt->fds[n].revents = 0;
if (pt->fds[n].fd >= max_fd)
max_fd = pt->fds[n].fd;
if (pt->fds[n].events & LWS_POLLIN)
FD_SET(pt->fds[n].fd, &readfds);
if (pt->fds[n].events & LWS_POLLOUT)
FD_SET(pt->fds[n].fd, &writefds);
FD_SET(pt->fds[n].fd, &errfds);
}
n = select(max_fd + 1, &readfds, &writefds, &errfds, ptv);
for (n = 0; n < pt->fds_count; n++) {
if (FD_ISSET(pt->fds[n].fd, &readfds))
pt->fds[n].revents |= LWS_POLLIN;
if (FD_ISSET(pt->fds[n].fd, &writefds))
pt->fds[n].revents |= LWS_POLLOUT;
if (FD_ISSET(pt->fds[n].fd, &errfds))
pt->fds[n].revents |= LWS_POLLHUP;
}
}
#ifdef LWS_OPENSSL_SUPPORT
if (!pt->rx_draining_ext_list &&
!lws_ssl_anybody_has_buffered_read_tsi(context, tsi) && !n) {
#else
if (!pt->rx_draining_ext_list && !n) /* poll timeout */ {
#endif
lws_service_fd_tsi(context, NULL, tsi);
return 0;
}
faked_service:
m = lws_service_flag_pending(context, tsi);
if (m)
c = -1; /* unknown limit */
else
if (n < 0) {
if (LWS_ERRNO != LWS_EINTR)
return -1;
return 0;
} else
c = n;
/* any socket with events to service? */
for (n = 0; n < pt->fds_count && c; n++) {
if (!pt->fds[n].revents)
continue;
c--;
m = lws_service_fd_tsi(context, &pt->fds[n], tsi);
if (m < 0)
return -1;
/* if something closed, retry this slot */
if (m)
n--;
}
return 0;
}
LWS_VISIBLE int
lws_plat_check_connection_error(struct lws *wsi)
{
return 0;
}
LWS_VISIBLE int
lws_plat_service(struct lws_context *context, int timeout_ms)
{
return _lws_plat_service_tsi(context, timeout_ms, 0);
}
LWS_VISIBLE int
lws_plat_set_socket_options(struct lws_vhost *vhost, int fd)
{
int optval = 1;
socklen_t optlen = sizeof(optval);
#if defined(__APPLE__) || \
defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
defined(__NetBSD__) || \
defined(__OpenBSD__)
struct protoent *tcp_proto;
#endif
if (vhost->ka_time) {
/* enable keepalive on this socket */
optval = 1;
if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE,
(const void *)&optval, optlen) < 0)
return 1;
#if defined(__APPLE__) || \
defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
defined(__NetBSD__) || \
defined(__CYGWIN__) || defined(__OpenBSD__) || defined (__sun)
/*
* didn't find a way to set these per-socket, need to
* tune kernel systemwide values
*/
#else
/* set the keepalive conditions we want on it too */
optval = vhost->ka_time;
if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE,
(const void *)&optval, optlen) < 0)
return 1;
optval = vhost->ka_interval;
if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPINTVL,
(const void *)&optval, optlen) < 0)
return 1;
optval = vhost->ka_probes;
if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPCNT,
(const void *)&optval, optlen) < 0)
return 1;
#endif
}
/* Disable Nagle */
optval = 1;
// if (setsockopt(fd, SOL_TCP, TCP_NODELAY, (const void *)&optval, optlen) < 0)
// return 1;
if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &optval, optlen) < 0)
return 1;
/* We are nonblocking... */
if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0)
return 1;
return 0;
}
LWS_VISIBLE void
lws_plat_drop_app_privileges(struct lws_context_creation_info *info)
{
}
LWS_VISIBLE int
lws_plat_context_early_init(void)
{
//signal(SIGPIPE, SIG_IGN);
// signal(SIGABRT, sigabrt_handler);
return 0;
}
LWS_VISIBLE void
lws_plat_context_early_destroy(struct lws_context *context)
{
}
LWS_VISIBLE void
lws_plat_context_late_destroy(struct lws_context *context)
{
#ifdef LWS_WITH_PLUGINS
if (context->plugin_list)
lws_plat_plugins_destroy(context);
#endif
if (context->lws_lookup)
lws_free(context->lws_lookup);
}
/* cast a struct sockaddr_in6 * into addr for ipv6 */
LWS_VISIBLE int
lws_interface_to_sa(int ipv6, const char *ifname, struct sockaddr_in *addr,
size_t addrlen)
{
#if 0
int rc = -1;
struct ifaddrs *ifr;
struct ifaddrs *ifc;
#ifdef LWS_USE_IPV6
struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
#endif
getifaddrs(&ifr);
for (ifc = ifr; ifc != NULL && rc; ifc = ifc->ifa_next) {
if (!ifc->ifa_addr)
continue;
lwsl_info(" interface %s vs %s\n", ifc->ifa_name, ifname);
if (strcmp(ifc->ifa_name, ifname))
continue;
switch (ifc->ifa_addr->sa_family) {
case AF_INET:
#ifdef LWS_USE_IPV6
if (ipv6) {
/* map IPv4 to IPv6 */
bzero((char *)&addr6->sin6_addr,
sizeof(struct in6_addr));
addr6->sin6_addr.s6_addr[10] = 0xff;
addr6->sin6_addr.s6_addr[11] = 0xff;
memcpy(&addr6->sin6_addr.s6_addr[12],
&((struct sockaddr_in *)ifc->ifa_addr)->sin_addr,
sizeof(struct in_addr));
} else
#endif
memcpy(addr,
(struct sockaddr_in *)ifc->ifa_addr,
sizeof(struct sockaddr_in));
break;
#ifdef LWS_USE_IPV6
case AF_INET6:
memcpy(&addr6->sin6_addr,
&((struct sockaddr_in6 *)ifc->ifa_addr)->sin6_addr,
sizeof(struct in6_addr));
break;
#endif
default:
continue;
}
rc = 0;
}
freeifaddrs(ifr);
if (rc == -1) {
/* check if bind to IP address */
#ifdef LWS_USE_IPV6
if (inet_pton(AF_INET6, ifname, &addr6->sin6_addr) == 1)
rc = 0;
else
#endif
if (inet_pton(AF_INET, ifname, &addr->sin_addr) == 1)
rc = 0;
}
return rc;
#endif
return -1;
}
LWS_VISIBLE void
lws_plat_insert_socket_into_fds(struct lws_context *context, struct lws *wsi)
{
struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
pt->fds[pt->fds_count++].revents = 0;
}
LWS_VISIBLE void
lws_plat_delete_socket_from_fds(struct lws_context *context,
struct lws *wsi, int m)
{
struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
pt->fds_count--;
}
LWS_VISIBLE void
lws_plat_service_periodic(struct lws_context *context)
{
}
LWS_VISIBLE int
lws_plat_change_pollfd(struct lws_context *context,
struct lws *wsi, struct lws_pollfd *pfd)
{
return 0;
}
LWS_VISIBLE const char *
lws_plat_inet_ntop(int af, const void *src, char *dst, int cnt)
{
return inet_ntop(af, src, dst, cnt);
}
LWS_VISIBLE lws_fop_fd_t IRAM_ATTR
_lws_plat_file_open(const struct lws_plat_file_ops *fops, const char *filename,
const char *vpath, lws_fop_flags_t *flags)
{
struct stat stat_buf;
lws_fop_fd_t fop_fd;
int ret = open(filename, *flags, 0664);
if (ret < 0)
return NULL;
if (fstat(ret, &stat_buf) < 0)
goto bail;
fop_fd = malloc(sizeof(*fop_fd));
if (!fop_fd)
goto bail;
fop_fd->fops = fops;
fop_fd->fd = ret;
fop_fd->flags = *flags;
fop_fd->filesystem_priv = NULL; /* we don't use it */
fop_fd->pos = 0;
fop_fd->len = stat_buf.st_size;
return fop_fd;
bail:
close(ret);
return NULL;
}
LWS_VISIBLE int IRAM_ATTR
_lws_plat_file_close(lws_fop_fd_t *fops_fd)
{
int fd = (*fops_fd)->fd;
free(*fops_fd);
*fops_fd = NULL;
return close(fd);
}
LWS_VISIBLE lws_fileofs_t IRAM_ATTR
_lws_plat_file_seek_cur(lws_fop_fd_t fops_fd, lws_fileofs_t offset)
{
return lseek(fops_fd->fd, offset, SEEK_CUR);
}
LWS_VISIBLE int IRAM_ATTR
_lws_plat_file_read(lws_fop_fd_t fops_fd, lws_filepos_t *amount,
uint8_t *buf, lws_filepos_t len)
{
long n;
n = read(fops_fd->fd, buf, len);
if (n == -1) {
*amount = 0;
return -1;
}
fops_fd->pos += n;
*amount = n;
return 0;
}
LWS_VISIBLE int IRAM_ATTR
_lws_plat_file_write(lws_fop_fd_t fops_fd, lws_filepos_t *amount,
uint8_t *buf, lws_filepos_t len)
{
long n;
n = write(fops_fd->fd, buf, len);
if (n == -1) {
*amount = 0;
return -1;
}
fops_fd->pos += n;
*amount = n;
return 0;
}
LWS_VISIBLE int
lws_plat_init(struct lws_context *context,
struct lws_context_creation_info *info)
{
/* master context has the global fd lookup array */
context->lws_lookup = lws_zalloc(sizeof(struct lws *) *
context->max_fds);
if (context->lws_lookup == NULL) {
lwsl_err("OOM on lws_lookup array for %d connections\n",
context->max_fds);
return 1;
}
lwsl_notice(" mem: platform fd map: %5lu bytes\n",
(unsigned long)(sizeof(struct lws *) * context->max_fds));
#ifdef LWS_WITH_PLUGINS
if (info->plugin_dirs)
lws_plat_plugins_init(context, info->plugin_dirs);
#endif
return 0;
}
LWS_VISIBLE void esp32_uvtimer_cb(TimerHandle_t t)
{
struct timer_mapping *p = pvTimerGetTimerID(t);
p->cb(p->t);
}
void ERR_error_string_n(unsigned long e, char *buf, size_t len)
{
strncpy(buf, "unknown", len);
}
void ERR_free_strings(void)
{
}
char *ERR_error_string(unsigned long e, char *buf)
{
if (buf)
strcpy(buf, "unknown");
return "unknown";
}
/* helper functionality */
#include "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",
.region = WIFI_COUNTRY_US, // default to safest option
};
/*
* 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;
static enum lws_gapss gapss = LWS_GAPSS_INITIAL;
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 = 0i, 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;
scan_ongoing = 0;
n = esp_wifi_scan_start(&scan_config, false);
if (n != ESP_OK)
lwsl_err("scan start failed %d\n", n);
}
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) {
scan_ongoing = 1;
xTimerStart(scan_timer, 0);
} else
lwsl_notice("%s: ignoring, no scan timer\n", __func__);
return 0;
}
static void
end_scan()
{
wifi_ap_record_t ap_records[10];
uint16_t count_ap_records;
int n, m;
count_ap_records = ARRAY_SIZE(ap_records);
if (esp_wifi_scan_get_ap_records(&count_ap_records, ap_records) != ESP_OK) {
lwsl_err("%s: failed\n", __func__);
return;
}
if (!count_ap_records)
goto passthru;
if (gapss != LWS_GAPSS_SCAN) {
lwsl_notice("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_notice("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_notice("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]) == 0)
goto hit;
}
continue;
hit:
m = (n + try_slot + 1) & 3;
try_slot = m;
lwsl_notice("Attempting connection with slot %d: %s:\n", m,
lws_esp32.ssid[m]);
/* set the ssid we last tried to connect to */
strncpy(lws_esp32.active_ssid, lws_esp32.ssid[m],
sizeof(lws_esp32.active_ssid) - 1);
lws_esp32.active_ssid[sizeof(lws_esp32.active_ssid) - 1] = '\0';
strncpy((char *)sta_config.sta.ssid, lws_esp32.ssid[m], sizeof(sta_config.sta.ssid) - 1);
strncpy((char *)sta_config.sta.password, lws_esp32.password[m], sizeof(sta_config.sta.password) - 1);
tcpip_adapter_set_hostname(TCPIP_ADAPTER_IF_STA, (const char *)&config.ap.ssid[7]);
lws_gapss_to(LWS_GAPSS_STAT);
esp_wifi_set_config(WIFI_IF_STA, &sta_config);
esp_wifi_connect();
mdns_init(TCPIP_ADAPTER_IF_STA, &lws_esp32.mdns);
mdns_set_hostname(lws_esp32.mdns, (const char *)&config.ap.ssid[7]);
mdns_set_instance(lws_esp32.mdns, "instance");
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);
}
esp_err_t lws_esp32_event_passthru(void *ctx, system_event_t *event)
{
char slot[8];
nvs_handle nvh;
uint32_t use;
switch(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");
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);
lws_esp32.inet = 0;
start_scan();
esp_wifi_connect();
break;
case SYSTEM_EVENT_STA_GOT_IP:
lwsl_notice("SYSTEM_EVENT_STA_GOT_IP\n");
lws_esp32.inet = 1;
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);
lwsl_notice(" --- Got IP %s\n", lws_esp32.sta_ip);
if (!nvs_open("lws-station", NVS_READWRITE, &nvh)) {
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);
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 r[2], lws_esp32_force_ap = 0, slot[12];
size_t s;
uint8_t mac[6];
int n, m;
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]);
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';
m = nvs_get_str(nvh, slot, lws_esp32.ssid[n], &s);
lwsl_notice("%s: %s: %d\n", slot, lws_esp32.ssid[n], m);
lws_snprintf(slot, sizeof(slot) - 1, "%dpassword", n);
s = sizeof(lws_esp32.password[0]) - 1;
lws_esp32.password[n][0] = '\0';
m = nvs_get_str(nvh, slot, lws_esp32.password[n], &s);
lwsl_notice("%s: %s: %d\n", slot, lws_esp32.password[n], m);
}
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;
s = sizeof(r);
if (nvs_get_str(nvh, "region", r, &s) != ESP_OK)
lws_esp32_force_ap = 1;
else
lws_esp32.region = atoi(r);
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);
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
};
ledc_timer_config(&ledc_timer);
/* 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);
scan_timer_exists = 1;
xTimerStart(leds_timer, 0);
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_wifi_set_country(lws_esp32.region);
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_wifi_set_country(lws_esp32.region);
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());
ESP_ERROR_CHECK(mdns_init(TCPIP_ADAPTER_IF_STA, &lws_esp32.mdns));
mdns_set_hostname(lws_esp32.mdns, (const char *)&config.ap.ssid[7]);
mdns_set_instance(lws_esp32.mdns, "instance");
}
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_feed();
if (spi_flash_erase_range(factory_part->address, factory_part->size) != ESP_OK) {
lwsl_err("spi: Failed to erase\n");
goto retry;
}
for (n = 0; n < factory_part->size; n += sizeof(buf)) {
esp_task_wdt_feed();
spi_flash_read(part->address + n , buf, sizeof(buf));
if (spi_flash_write(factory_part->address + n, buf, sizeof(buf)) != ESP_OK) {
lwsl_err("spi: Failed to write\n");
goto retry;
}
}
/* destroy our OTA image header */
spi_flash_erase_range(ota->address, 4096);
/*
* with no viable OTA image, we will come back up in factory
* where the user can reload the OTA image
*/
lwsl_notice(" FACTORY copy successful, rebooting\n");
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->port = 443;
info->fd_limit_per_thread = 30;
info->max_http_header_pool = 3;
info->max_http_header_data = 1024;
info->pt_serv_buf_size = 4096;
info->keepalive_timeout = 30;
info->timeout_secs = 30;
info->simultaneous_ssl_restriction = 3;
info->options = LWS_SERVER_OPTION_EXPLICIT_VHOSTS |
LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT;
info->ssl_cert_filepath = "ssl-pub.pem";
info->ssl_private_key_filepath = "ssl-pri.pem";
}
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)
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;
i->romfs = hdr + 4;
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;
}
struct lws_context *
lws_esp32_init(struct lws_context_creation_info *info)
{
const esp_partition_t *part = lws_esp_ota_get_boot_partition();
struct lws_context *context;
struct lws_esp32_image i;
struct lws_vhost *vhost;
nvs_handle nvh;
char buf[512];
size_t s;
int n;
ESP_ERROR_CHECK(nvs_open("lws-station", NVS_READWRITE, &nvh));
n = 0;
s = 1;
if (nvs_get_blob(nvh, "ssl-pub.pem", NULL, &s) == ESP_OK)
n = 1;
s = 1;
if (nvs_get_blob(nvh, "ssl-pri.pem", NULL, &s) == ESP_OK)
n |= 2;
nvs_close(nvh);
if (n != 3) {
/* we are not configured for SSL yet... fall back to port 80 / http */
info->port = 80;
info->options &= ~LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT;
lwsl_notice("No SSL certs... using port 80\n");
}
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("Failed to mount 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);
vhost = lws_create_vhost(context, info);
if (!vhost)
lwsl_err("Failed to create vhost\n");
else
lws_init_vhost_client_ssl(info, vhost);
lws_protocol_init(context);
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 0:
return 4096 + sineq16[n & 15];
case 1:
return 4096 + sineq16[15 - (n & 15)];
case 2:
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
*/
return (sine_lu(n >> 4) * (15 - (n & 15)) +
sine_lu((n >> 4) + 1) * (n & 15)) / 15;
}
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