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Tasmota/tasmota/support_device_groups.ino

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/*
support_device_groups.ino - device groups support for Tasmota
Copyright (C) 2020 Paul C Diem
Device group allow multiple devices to be in a group with power, light
brightness, fade and speed settings and other module-specific settings
kept in sync across all devices in the group.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef USE_DEVICE_GROUPS
//#define DEVICE_GROUPS_DEBUG
#define DGR_MEMBER_TIMEOUT 45000
#define DGR_ANNOUNCEMENT_INTERVAL 60000
#define DEVICE_GROUP_MESSAGE "TASMOTA_DGR"
const char kDeviceGroupMessage[] PROGMEM = DEVICE_GROUP_MESSAGE;
struct device_group_member {
struct device_group_member * flink;
IPAddress ip_address;
uint16_t received_sequence;
uint16_t acked_sequence;
uint32_t unicast_count;
};
struct device_group {
uint32_t next_announcement_time;
uint32_t next_ack_check_time;
uint32_t member_timeout_time;
uint16_t outgoing_sequence;
uint16_t last_full_status_sequence;
uint16_t message_length;
uint16_t ack_check_interval;
uint8_t message_header_length;
uint8_t initial_status_requests_remaining;
char group_name[TOPSZ];
uint8_t message[128];
struct device_group_member * device_group_members;
#ifdef USE_DEVICE_GROUPS_SEND
uint8_t values_8bit[DGR_ITEM_LAST_8BIT];
uint16_t values_16bit[DGR_ITEM_LAST_16BIT - DGR_ITEM_MAX_8BIT - 1];
uint32_t values_32bit[DGR_ITEM_LAST_32BIT - DGR_ITEM_MAX_16BIT - 1];
#endif // USE_DEVICE_GROUPS_SEND
};
WiFiUDP device_groups_udp;
struct device_group * device_groups;
uint32_t next_check_time;
bool device_groups_initialized = false;
bool device_groups_up = false;
bool building_status_message = false;
bool ignore_dgr_sends = false;
char * IPAddressToString(const IPAddress& ip_address)
{
static char buffer[16];
sprintf_P(buffer, PSTR("%u.%u.%u.%u"), ip_address[0], ip_address[1], ip_address[2], ip_address[3]);
return buffer;
}
uint8_t * BeginDeviceGroupMessage(struct device_group * device_group, uint16_t flags, bool hold_sequence = false)
{
uint8_t * message_ptr = &device_group->message[device_group->message_header_length];
if (!hold_sequence && !++device_group->outgoing_sequence) device_group->outgoing_sequence = 1;
*message_ptr++ = device_group->outgoing_sequence & 0xff;
*message_ptr++ = device_group->outgoing_sequence >> 8;
*message_ptr++ = flags & 0xff;
*message_ptr++ = flags >> 8;
return message_ptr;
}
// Return true if we're configured to share the specified item.
bool DeviceGroupItemShared(bool incoming, uint8_t item)
{
uint32_t mask;
if (item == DGR_ITEM_LIGHT_BRI || item == DGR_ITEM_BRI_POWER_ON)
mask = DGR_SHARE_LIGHT_BRI;
else if (item == DGR_ITEM_POWER)
mask = DGR_SHARE_POWER;
else if (item == DGR_ITEM_LIGHT_SCHEME)
mask = DGR_SHARE_LIGHT_SCHEME;
else if (item == DGR_ITEM_LIGHT_FIXED_COLOR || DGR_ITEM_LIGHT_CHANNELS)
mask = DGR_SHARE_LIGHT_COLOR;
else if (item == DGR_ITEM_LIGHT_FADE || item == DGR_ITEM_LIGHT_SPEED)
mask = DGR_SHARE_LIGHT_FADE;
else if (item == DGR_ITEM_BRI_PRESET_LOW || item == DGR_ITEM_BRI_PRESET_HIGH)
mask = DGR_SHARE_DIMMER_SETTINGS;
else if (item == DGR_ITEM_EVENT)
mask = DGR_SHARE_EVENT;
else
return true;
return mask & (incoming ? Settings.device_group_share_in : Settings.device_group_share_out);
}
void DeviceGroupsInit(void)
{
// If no module set the device group count, ...
if (!device_group_count) {
// If relays in sepaate device groups is enabled, set the device group count to highest numbered
// relay.
if (Settings.flag4.multiple_device_groups) { // SetOption88 - Enable relays in separate device groups
for (uint32_t relay_index = 0; relay_index < MAX_RELAYS; relay_index++) {
if (PinUsed(GPIO_REL1, relay_index)) device_group_count = relay_index + 1;
}
if (device_group_count > MAX_DEV_GROUP_NAMES) device_group_count = MAX_DEV_GROUP_NAMES;
}
// Otherwise, set the device group count to 1.
else {
device_group_count = 1;
}
}
// If there are more device group names set than the number of device groups needed by the
// mdoule, use the device group name count as the device group count.
for (; device_group_count < MAX_DEV_GROUP_NAMES; device_group_count++) {
if (!*SettingsText(SET_DEV_GROUP_NAME1 + device_group_count)) break;
}
// Initialize the device information for each device group.
device_groups = (struct device_group *)calloc(device_group_count, sizeof(struct device_group));
if (!device_groups) {
AddLog_P2(LOG_LEVEL_ERROR, PSTR("DGR: Error allocating %u-element array"), device_group_count);
return;
}
struct device_group * device_group = device_groups;
for (uint32_t device_group_index = 0; device_group_index < device_group_count; device_group_index++, device_group++) {
strcpy(device_group->group_name, SettingsText(SET_DEV_GROUP_NAME1 + device_group_index));
// If the device group name is not set, use the MQTT group topic (with the device group index +
// 1 appended for device group indices > 0).
if (!device_group->group_name[0]) {
strcpy(device_group->group_name, SettingsText(SET_MQTT_GRP_TOPIC));
if (device_group_index) {
snprintf_P(device_group->group_name, sizeof(device_group->group_name), PSTR("%s%u"), device_group->group_name, device_group_index + 1);
}
}
device_group->message_header_length = sprintf_P((char *)device_group->message, PSTR("%s%s"), kDeviceGroupMessage, device_group->group_name) + 1;
device_group->last_full_status_sequence = -1;
}
// If both in and out shared items masks are 0, assume they're unitialized and initialize them.
if (!Settings.device_group_share_in && !Settings.device_group_share_out) {
Settings.device_group_share_in = Settings.device_group_share_out = 0xffffffff;
}
device_groups_initialized = true;
}
void DeviceGroupsStart()
{
if (Settings.flag4.device_groups_enabled && !device_groups_up && !TasmotaGlobal.restart_flag) {
// If we haven't successfuly initialized device groups yet, attempt to do it now.
if (!device_groups_initialized) {
DeviceGroupsInit();
if (!device_groups_initialized) return;
}
// Subscribe to device groups multicasts.
if (!device_groups_udp.beginMulticast(WiFi.localIP(), IPAddress(DEVICE_GROUPS_ADDRESS), DEVICE_GROUPS_PORT)) {
AddLog_P2(LOG_LEVEL_ERROR, PSTR("DGR: Error subscribing"));
return;
}
device_groups_up = true;
// The WiFi was down but now it's up and device groups is initialized. (Re-)discover devices in
// our device group(s). Load the status request message for all device groups. This message will
// be multicast 10 times at 200ms intervals.
next_check_time = millis() + 2000;
struct device_group * device_group = device_groups;
for (uint32_t device_group_index = 0; device_group_index < device_group_count; device_group_index++, device_group++) {
device_group->next_announcement_time = -1;
device_group->message_length = BeginDeviceGroupMessage(device_group, DGR_FLAG_RESET | DGR_FLAG_STATUS_REQUEST) - device_group->message;
device_group->initial_status_requests_remaining = 10;
device_group->next_ack_check_time = next_check_time;
}
AddLog_P2(LOG_LEVEL_DEBUG, PSTR("DGR: (Re)discovering members"));
}
}
void DeviceGroupsStop()
{
device_groups_udp.flush();
device_groups_up = false;
}
void SendReceiveDeviceGroupMessage(struct device_group * device_group, struct device_group_member * device_group_member, uint8_t * message, int message_length, bool received)
{
char log_buffer[512];
bool item_processed = false;
uint16_t message_sequence;
uint16_t flags;
int device_group_index = device_group - device_groups;
int log_length;
int log_remaining;
char * log_ptr;
// Find the end and start of the actual message (after the header).
uint8_t * message_end_ptr = message + message_length;
uint8_t * message_ptr = message + strlen((char *)message) + 1;
// Get the message sequence and flags.
if (message_ptr + 4 > message_end_ptr) goto badmsg; // Malformed message - must be at least 16-bit sequence, 16-bit flags left
message_sequence = *message_ptr++;
message_sequence |= *message_ptr++ << 8;
flags = *message_ptr++;
flags |= *message_ptr++ << 8;
// Initialize the log buffer.
log_length = sprintf(log_buffer, PSTR("DGR: %s %s message %s %s: seq=%u, flags=%u"), (received ? PSTR("Received") : PSTR("Sending")), device_group->group_name, (received ? PSTR("from") : PSTR("to")), (device_group_member ? IPAddressToString(device_group_member->ip_address) : received ? PSTR("local") : PSTR("network")), message_sequence, flags);
log_ptr = log_buffer + log_length;
log_remaining = sizeof(log_buffer) - log_length;
// If this is an announcement, just log it.
if (flags == DGR_FLAG_ANNOUNCEMENT) goto write_log;
// If this is a received ack message, save the message sequence if it's newer than the last ack we
// received from this member.
if (flags == DGR_FLAG_ACK) {
if (received && device_group_member && (message_sequence > device_group_member->acked_sequence || device_group_member->acked_sequence - message_sequence < 64536)) {
device_group_member->acked_sequence = message_sequence;
}
goto write_log;
}
// If this is a received message, send an ack message to the sender.
if (device_group_member) {
if (received) {
if (!(flags & DGR_FLAG_MORE_TO_COME)) {
*(message_ptr - 2) = DGR_FLAG_ACK;
*(message_ptr - 1) = 0;
SendReceiveDeviceGroupMessage(device_group, device_group_member, message, message_ptr - message, false);
}
}
// If we're sending this message directly to a member, it's a resend.
else {
log_length = snprintf(log_ptr, log_remaining, PSTR(", last ack=%u"), device_group_member->acked_sequence);
log_ptr += log_length;
log_remaining -= log_length;
goto write_log;
}
}
// If this is a status request message, skip item processing.
if ((flags & DGR_FLAG_STATUS_REQUEST)) goto write_log;
// If this is a received message, ...
if (received) {
// If we already processed this or a later message from this group member, ignore this message.
if (device_group_member) {
if (message_sequence <= device_group_member->received_sequence) {
if (message_sequence == device_group_member->received_sequence || device_group_member->received_sequence - message_sequence > 64536) {
log_length = snprintf(log_ptr, log_remaining, PSTR(" (old)"));
log_ptr += log_length;
log_remaining -= log_length;
goto write_log;
}
}
device_group_member->received_sequence = message_sequence;
}
/*
XdrvMailbox
bool grpflg
bool usridx
uint16_t command_code Item code
uint32_t index 0:15 Flags, 16:31 Message sequence
uint32_t data_len String item value length
int32_t payload Integer item value
char *topic Pointer to device group index
char *data Pointer to non-integer item value
char *command nullptr
*/
XdrvMailbox.command = nullptr; // Indicates the source is a device group update
XdrvMailbox.index = flags | message_sequence << 16;
if (device_group_index == 0 && first_device_group_is_local) XdrvMailbox.index |= DGR_FLAG_LOCAL;
XdrvMailbox.topic = (char *)&device_group_index;
if (flags & (DGR_FLAG_MORE_TO_COME | DGR_FLAG_DIRECT)) TasmotaGlobal.skip_light_fade = true;
// Set the flag to ignore device group send message request so callbacks from the drivers do not
// send updates.
ignore_dgr_sends = true;
}
uint8_t item;
int32_t value;
for (;;) {
if (message_ptr >= message_end_ptr) goto badmsg; // Malformed message
item = *message_ptr++;
if (!item) break; // Done
#ifdef DEVICE_GROUPS_DEBUG
switch (item) {
case DGR_ITEM_FLAGS:
case DGR_ITEM_LIGHT_FADE:
case DGR_ITEM_LIGHT_SPEED:
case DGR_ITEM_LIGHT_BRI:
case DGR_ITEM_LIGHT_SCHEME:
case DGR_ITEM_LIGHT_FIXED_COLOR:
case DGR_ITEM_BRI_PRESET_LOW:
case DGR_ITEM_BRI_PRESET_HIGH:
case DGR_ITEM_BRI_POWER_ON:
case DGR_ITEM_POWER:
case DGR_ITEM_EVENT:
case DGR_ITEM_LIGHT_CHANNELS:
break;
default:
AddLog_P2(LOG_LEVEL_ERROR, PSTR("DGR: *** Invalid item=%u"), item);
}
#endif // DEVICE_GROUPS_DEBUG
log_length = snprintf(log_ptr, log_remaining, PSTR(", %u="), item);
log_ptr += log_length;
log_remaining -= log_length;
log_length = 0;
if (item <= DGR_ITEM_LAST_32BIT) {
value = *message_ptr++;
if (item > DGR_ITEM_MAX_8BIT) {
value |= *message_ptr++ << 8;
if (item > DGR_ITEM_MAX_16BIT) {
value |= *message_ptr++ << 16;
value |= *message_ptr++ << 24;
#ifdef USE_DEVICE_GROUPS_SEND
device_group->values_32bit[item - DGR_ITEM_MAX_16BIT - 1] = (item == DGR_ITEM_POWER ? value & 0xffffff : value);
#endif // USE_DEVICE_GROUPS_SEND
}
#ifdef USE_DEVICE_GROUPS_SEND
else {
device_group->values_16bit[item - DGR_ITEM_MAX_8BIT - 1] = value;
}
#endif // USE_DEVICE_GROUPS_SEND
}
#ifdef USE_DEVICE_GROUPS_SEND
else {
device_group->values_8bit[item] = value;
}
#endif // USE_DEVICE_GROUPS_SEND
log_length = snprintf(log_ptr, log_remaining, PSTR("%u"), value);
}
else {
value = *message_ptr++;
if (received) XdrvMailbox.data = (char *)message_ptr;
if (message_ptr + value >= message_end_ptr) goto badmsg; // Malformed message
if (item <= DGR_ITEM_MAX_STRING) {
log_length = snprintf(log_ptr, log_remaining, PSTR("'%s'"), message_ptr);
}
else {
switch (item) {
case DGR_ITEM_LIGHT_CHANNELS:
log_length = snprintf(log_ptr, log_remaining, PSTR("%u,%u,%u,%u,%u,%u"), *message_ptr, *(message_ptr + 1), *(message_ptr + 2), *(message_ptr + 3), *(message_ptr + 4), *(message_ptr + 5));
break;
}
}
message_ptr += value;
}
log_ptr += log_length;
log_remaining -= log_length;
if (received && DeviceGroupItemShared(true, item)) {
item_processed = true;
XdrvMailbox.command_code = item;
XdrvMailbox.payload = value;
XdrvMailbox.data_len = value;
*log_ptr++ = '*';
log_remaining--;
switch (item) {
case DGR_ITEM_POWER:
if (Settings.flag4.multiple_device_groups) { // SetOption88 - Enable relays in separate device groups
if (device_group_index < TasmotaGlobal.devices_present) {
bool on = (value & 1);
if (on != (TasmotaGlobal.power & (1 << device_group_index))) ExecuteCommandPower(device_group_index + 1, (on ? POWER_ON : POWER_OFF), SRC_REMOTE);
}
}
else if (XdrvMailbox.index & DGR_FLAG_LOCAL) {
uint8_t mask_devices = value >> 24;
if (mask_devices > TasmotaGlobal.devices_present) mask_devices = TasmotaGlobal.devices_present;
for (uint32_t i = 0; i < mask_devices; i++) {
uint32_t mask = 1 << i;
bool on = (value & mask);
if (on != (TasmotaGlobal.power & mask)) ExecuteCommandPower(i + 1, (on ? POWER_ON : POWER_OFF), SRC_REMOTE);
}
}
break;
#ifdef USE_RULES
case DGR_ITEM_EVENT:
CmndEvent();
break;
#endif
case DGR_ITEM_COMMAND:
ExecuteCommand(XdrvMailbox.data, SRC_REMOTE);
break;
}
XdrvCall(FUNC_DEVICE_GROUP_ITEM);
}
}
if (received) {
if (item_processed) {
XdrvMailbox.command_code = DGR_ITEM_EOL;
XdrvCall(FUNC_DEVICE_GROUP_ITEM);
}
}
write_log:
*log_ptr++ = 0;
AddLog_P(LOG_LEVEL_DEBUG_MORE, log_buffer);
// If this is a received status request message, then if the requestor didn't just ack our
// previous full status update, send a full status update.
if (received) {
if ((flags & DGR_FLAG_STATUS_REQUEST)) {
if ((flags & DGR_FLAG_RESET) || device_group_member->acked_sequence != device_group->last_full_status_sequence) {
_SendDeviceGroupMessage(device_group_index, DGR_MSGTYP_FULL_STATUS);
}
}
}
// If this is a message being sent, send it.
else {
int attempt;
IPAddress ip_address = (device_group_member ? device_group_member->ip_address : IPAddress(DEVICE_GROUPS_ADDRESS));
for (attempt = 1; attempt <= 5; attempt++) {
if (device_groups_udp.beginPacket(ip_address, DEVICE_GROUPS_PORT)) {
device_groups_udp.write(message, message_length);
if (device_groups_udp.endPacket()) break;
}
delay(10);
}
if (attempt > 5) AddLog_P2(LOG_LEVEL_ERROR, PSTR("DGR: Error sending message"));
}
goto cleanup;
badmsg:
AddLog_P(LOG_LEVEL_ERROR, PSTR("%s ** incorrect length"), log_buffer);
cleanup:
if (received) {
TasmotaGlobal.skip_light_fade = false;
ignore_dgr_sends = false;
}
}
bool _SendDeviceGroupMessage(uint8_t device_group_index, DevGroupMessageType message_type, ...)
{
// If device groups is not up, ignore this request.
if (!device_groups_up) return 1;
// If the device group index is higher then the number of device groups, ignore this request.
if (device_group_index >= device_group_count) return 0;
// Extract the flags from the message type.
bool with_local = ((message_type & DGR_MSGTYPFLAG_WITH_LOCAL) != 0);
message_type = (DevGroupMessageType)(message_type & 0x7F);
// If we're currently processing a remote device message, ignore this request.
if (ignore_dgr_sends && message_type != DGR_MSGTYPE_UPDATE_COMMAND) return 0;
// Get a pointer to the device information for this device.
struct device_group * device_group = &device_groups[device_group_index];
// If we're still sending initial status requests, ignore this request.
if (device_group->initial_status_requests_remaining) return 1;
// Load the message header, sequence and flags.
#ifdef DEVICE_GROUPS_DEBUG
AddLog_P2(LOG_LEVEL_DEBUG, PSTR("DGR: Building %s %spacket"), device_group->group_name, (message_type == DGR_MSGTYP_FULL_STATUS ? PSTR("full status ") : PSTR("")));
#endif // DEVICE_GROUPS_DEBUG
uint16_t original_sequence = device_group->outgoing_sequence;
uint16_t flags = 0;
if (message_type == DGR_MSGTYP_UPDATE_MORE_TO_COME)
flags = DGR_FLAG_MORE_TO_COME;
else if (message_type == DGR_MSGTYP_UPDATE_DIRECT)
flags = DGR_FLAG_DIRECT;
uint8_t * message_ptr = BeginDeviceGroupMessage(device_group, flags, building_status_message || message_type == DGR_MSGTYP_PARTIAL_UPDATE);
// A full status request is a request from a remote device for the status of every item we
// control. As long as we're building it, we may as well multicast the status update to all
// device group members.
if (message_type == DGR_MSGTYP_FULL_STATUS) {
device_group->last_full_status_sequence = device_group->outgoing_sequence;
device_group->message_length = 0;
// Set the flag indicating we're currently building a status message. SendDeviceGroupMessage
// will build but not send messages while this flag is set.
building_status_message = true;
// Call the drivers to build the status update.
SendDeviceGroupMessage(device_group_index, DGR_MSGTYP_PARTIAL_UPDATE, DGR_ITEM_POWER, TasmotaGlobal.power);
XdrvMailbox.index = 0;
if (device_group_index == 0 && first_device_group_is_local) XdrvMailbox.index = DGR_FLAG_LOCAL;
XdrvMailbox.command_code = DGR_ITEM_STATUS;
XdrvMailbox.topic = (char *)&device_group_index;
XdrvCall(FUNC_DEVICE_GROUP_ITEM);
building_status_message = false;
// Set the status update flag in the outgoing message.
*(message_ptr - 2) |= DGR_FLAG_FULL_STATUS;
// If we have nothing to share with the other members, just send the EOL item.
if (!device_group->message_length) {
*message_ptr++ = 0;
device_group->message_length = message_ptr - device_group->message;
}
}
else {
#ifdef USE_DEVICE_GROUPS_SEND
uint8_t out_buffer[128];
bool escaped;
char chr;
char oper;
uint32_t old_value;
uint8_t * out_ptr = out_buffer;
#endif // USE_DEVICE_GROUPS_SEND
struct item {
uint8_t item;
uint32_t value;
void * value_ptr;
} item_array[32];
bool shared;
uint8_t item;
uint32_t value;
uint8_t * value_ptr;
uint8_t * first_item_ptr = message_ptr;
struct item * item_ptr;
va_list ap;
// Build an array of all the items and values in this update.
item_ptr = item_array;
#ifdef USE_DEVICE_GROUPS_SEND
if (message_type == DGR_MSGTYPE_UPDATE_COMMAND) {
value_ptr = (uint8_t *)XdrvMailbox.data;
while ((item = strtoul((char *)value_ptr, (char **)&value_ptr, 0))) {
item_ptr->item = item;
if (*value_ptr != '=') return 1;
value_ptr++;
if (item <= DGR_ITEM_MAX_32BIT) {
oper = 0;
if (*value_ptr == '@') {
oper = value_ptr[1];
value_ptr += 2;
}
value = (isdigit(*value_ptr) ? strtoul((char *)value_ptr, (char **)&value_ptr, 0) : 1);
if (oper) {
old_value = (item <= DGR_ITEM_MAX_8BIT ? device_group->values_8bit[item] : (item <= DGR_ITEM_MAX_16BIT ? device_group->values_16bit[item - DGR_ITEM_MAX_8BIT - 1] : device_group->values_32bit[item - DGR_ITEM_MAX_16BIT - 1]));
value = (oper == '+' ? old_value + value : (oper == '-' ? old_value - value : (oper == '^' ? old_value ^ (value ? value : 0xffffffff) : old_value)));
}
item_ptr->value = value;
}
else {
item_ptr->value_ptr = out_ptr;
if (item <= DGR_ITEM_MAX_STRING) {
escaped = false;
while ((chr = *value_ptr++)) {
if (chr == ' ' && !escaped) break;
if (!(escaped = (chr == '\\' && !escaped))) *out_ptr++ = chr;
}
*out_ptr = 0;
}
else {
switch (item) {
case DGR_ITEM_LIGHT_CHANNELS:
for (int i = 0; i < 6; i++) {
*out_ptr++ = strtoul((char *)value_ptr, (char **)&value_ptr, 0);
if (*value_ptr == ',') value_ptr++;
}
break;
}
}
}
item_ptr++;
}
}
else {
#endif // USE_DEVICE_GROUPS_SEND
va_start(ap, message_type);
while ((item = va_arg(ap, int))) {
item_ptr->item = item;
if (item <= DGR_ITEM_MAX_32BIT)
item_ptr->value = va_arg(ap, int);
else if (item <= DGR_ITEM_MAX_STRING)
item_ptr->value_ptr = va_arg(ap, char *);
else {
item_ptr->value_ptr = va_arg(ap, uint8_t *);
}
item_ptr++;
}
va_end(ap);
#ifdef USE_DEVICE_GROUPS_SEND
}
#endif // USE_DEVICE_GROUPS_SEND
item_ptr->item = 0;
// If we're still building this update or all group members haven't acknowledged the previous
// update yet, update the message to include these new updates. First we need to rebuild the
// previous update message to remove any items and their values that are included in this new
// update.
if (device_group->message_length) {
int kept_item_count = 0;
// Rebuild the previous update message, removing any items whose values are included in this
// new update.
uint8_t * previous_message_ptr = message_ptr;
while (item = *previous_message_ptr++) {
// Determine the length of this item's value.
if (item <= DGR_ITEM_MAX_32BIT) {
value = 1;
if (item > DGR_ITEM_MAX_8BIT) {
value = 2;
if (item > DGR_ITEM_MAX_16BIT) {
value = 4;
}
}
}
else {
value = *previous_message_ptr + 1;
}
// Search for this item in the new update.
for (item_ptr = item_array; item_ptr->item; item_ptr++) {
if (item_ptr->item == item) break;
}
// If this item was not found in the new update, copy it to the new update message.
if (!item_ptr->item) {
kept_item_count++;
*message_ptr++ = item;
memmove(message_ptr, previous_message_ptr, value);
message_ptr += value;
}
// Advance past the item value.
previous_message_ptr += value;
}
#ifdef DEVICE_GROUPS_DEBUG
AddLog_P2(LOG_LEVEL_DEBUG, PSTR("DGR: %u items carried over"), kept_item_count);
#endif // DEVICE_GROUPS_DEBUG
}
// Itertate through the passed items adding them and their values to the message.
for (item_ptr = item_array; (item = item_ptr->item); item_ptr++) {
// If this item is shared with the group add it to the message.
shared = true;
if (!device_group_index && message_type != DGR_MSGTYPE_UPDATE_COMMAND) shared = DeviceGroupItemShared(false, item);
if (shared) {
*message_ptr++ = item;
// For integer items, add the value to the message.
if (item <= DGR_ITEM_MAX_32BIT) {
value = item_ptr->value;
*message_ptr++ = value & 0xff;
if (item > DGR_ITEM_MAX_8BIT) {
value >>= 8;
*message_ptr++ = value & 0xff;
if (item > DGR_ITEM_MAX_16BIT) {
value >>= 8;
*message_ptr++ = value & 0xff;
value >>= 8;
// For the power item, the device count is overlayed onto the highest 8 bits.
if (item == DGR_ITEM_POWER && !value) value = (device_group_index == 0 && first_device_group_is_local ? TasmotaGlobal.devices_present : 1);
*message_ptr++ = value;
}
}
}
// For string items and special items, get the value length.
else {
if (item <= DGR_ITEM_MAX_STRING) {
value = strlen((const char *)item_ptr->value_ptr) + 1;
}
else {
switch (item) {
case DGR_ITEM_LIGHT_CHANNELS:
value = 6;
break;
}
}
// Load the length and copy the value.
*message_ptr++ = value;
memcpy(message_ptr, item_ptr->value_ptr, value);
message_ptr += value;
}
}
}
// If we added any items, add the EOL item code and calculate the message length.
if (message_ptr != first_item_ptr) {
*message_ptr++ = 0;
device_group->message_length = message_ptr - device_group->message;
}
// If there's going to be more items added to this message, return.
if (building_status_message || message_type == DGR_MSGTYP_PARTIAL_UPDATE) return 0;
}
// If there is no message, restore the sequence number and return.
if (!device_group->message_length) {
device_group->outgoing_sequence = original_sequence;
return 0;
}
// Multicast the packet.
SendReceiveDeviceGroupMessage(device_group, nullptr, device_group->message, device_group->message_length, false);
#ifdef USE_DEVICE_GROUPS_SEND
// If requested, handle this updated locally as well.
if (with_local) {
struct XDRVMAILBOX save_XdrvMailbox = XdrvMailbox;
SendReceiveDeviceGroupMessage(device_group, nullptr, device_group->message, device_group->message_length, true);
XdrvMailbox = save_XdrvMailbox;
}
#endif // USE_DEVICE_GROUPS_SEND
uint32_t now = millis();
if (message_type == DGR_MSGTYP_UPDATE_MORE_TO_COME) {
device_group->message_length = 0;
device_group->next_ack_check_time = 0;
}
else {
device_group->ack_check_interval = 200;
device_group->next_ack_check_time = now + device_group->ack_check_interval;
if (device_group->next_ack_check_time < next_check_time) next_check_time = device_group->next_ack_check_time;
device_group->member_timeout_time = now + DGR_MEMBER_TIMEOUT;
}
device_group->next_announcement_time = now + DGR_ANNOUNCEMENT_INTERVAL;
if (device_group->next_announcement_time < next_check_time) next_check_time = device_group->next_announcement_time;
return 0;
}
void ProcessDeviceGroupMessage(uint8_t * message, int message_length)
{
// Search for a device group with the target group name. If one isn't found, return.
uint8_t device_group_index = 0;
struct device_group * device_group = device_groups;
char * message_group_name = (char *)message + sizeof(DEVICE_GROUP_MESSAGE) - 1;
for (;;) {
if (!strcmp(message_group_name, device_group->group_name)) break;
if (++device_group_index >= device_group_count) return;
device_group++;
}
// Find the group member. If this is a new group member, add it.
struct device_group_member * device_group_member;
IPAddress remote_ip = device_groups_udp.remoteIP();
struct device_group_member * * flink = &device_group->device_group_members;
for (;;) {
device_group_member = *flink;
if (!device_group_member) {
device_group_member = (struct device_group_member *)calloc(1, sizeof(struct device_group_member));
if (device_group_member == nullptr) {
AddLog_P2(LOG_LEVEL_ERROR, PSTR("DGR: Error allocating member block"));
return;
}
device_group_member->ip_address = remote_ip;
*flink = device_group_member;
AddLog_P2(LOG_LEVEL_DEBUG, PSTR("DGR: Member %s added"), IPAddressToString(remote_ip));
break;
}
else if (device_group_member->ip_address == remote_ip) {
break;
}
flink = &device_group_member->flink;
}
SendReceiveDeviceGroupMessage(device_group, device_group_member, message, message_length, true);
}
void DeviceGroupStatus(uint8_t device_group_index)
{
if (Settings.flag4.device_groups_enabled && device_group_index < device_group_count) {
char buffer[1024];
int member_count = 0;
struct device_group * device_group = &device_groups[device_group_index];
buffer[0] = buffer[1] = 0;
for (struct device_group_member * device_group_member = device_group->device_group_members; device_group_member; device_group_member = device_group_member->flink) {
snprintf_P(buffer, sizeof(buffer), PSTR("%s,{\"IPAddress\":\"%s\",\"ResendCount\":%u,\"LastRcvdSeq\":%u,\"LastAckedSeq\":%u}"), buffer, IPAddressToString(device_group_member->ip_address), device_group_member->unicast_count, device_group_member->received_sequence, device_group_member->acked_sequence);
member_count++;
}
Response_P(PSTR("{\"" D_CMND_DEVGROUPSTATUS "\":{\"Index\":%u,\"GroupName\":\"%s\",\"MessageSeq\":%u,\"MemberCount\":%d,\"Members\":[%s]}}"), device_group_index, device_group->group_name, device_group->outgoing_sequence, member_count, &buffer[1]);
}
}
void DeviceGroupsLoop(void)
{
if (!device_groups_up || TasmotaGlobal.restart_flag) return;
while (device_groups_udp.parsePacket()) {
uint8_t packet_buffer[512];
int length = device_groups_udp.read(packet_buffer, sizeof(packet_buffer) - 1);
if (length > 0) {
packet_buffer[length] = 0;
if (!strncmp_P((char *)packet_buffer, kDeviceGroupMessage, sizeof(DEVICE_GROUP_MESSAGE) - 1)) {
ProcessDeviceGroupMessage(packet_buffer, length);
}
}
}
uint32_t now = millis();
// If it's time to check on things, iterate through the device groups.
if ((long)(now - next_check_time) >= 0) {
#ifdef DEVICE_GROUPS_DEBUG
AddLog_P2(LOG_LEVEL_DEBUG, PSTR("DGR: Checking next_check_time=%u, now=%u"), next_check_time, now);
#endif // DEVICE_GROUPS_DEBUG
next_check_time = now + DGR_ANNOUNCEMENT_INTERVAL * 2;
struct device_group * device_group = device_groups;
for (uint32_t device_group_index = 0; device_group_index < device_group_count; device_group_index++, device_group++) {
// If we're still waiting for acks to the last update from this device group, ...
if (device_group->next_ack_check_time) {
// If it's time to check for acks, ...
if ((long)(now - device_group->next_ack_check_time) >= 0) {
// If we're still sending the initial status request message, send it.
if (device_group->initial_status_requests_remaining) {
if (--device_group->initial_status_requests_remaining) {
#ifdef DEVICE_GROUPS_DEBUG
AddLog_P2(LOG_LEVEL_DEBUG, PSTR("DGR: Sending initial status request for group %s"), device_group->group_name);
#endif // DEVICE_GROUPS_DEBUG
SendReceiveDeviceGroupMessage(device_group, nullptr, device_group->message, device_group->message_length, false);
device_group->message[device_group->message_header_length + 2] = DGR_FLAG_STATUS_REQUEST; // The reset flag is on only for the first packet - turn it off now
next_check_time = device_group->next_ack_check_time = now + 200;
continue;
}
// If we've sent the initial status request message the set number of times, send our
// status to all the members.
else {
_SendDeviceGroupMessage(device_group_index, DGR_MSGTYP_FULL_STATUS);
}
}
// If we're done initializing, iterate through the group memebers, ...
else {
#ifdef DEVICE_GROUPS_DEBUG
AddLog_P2(LOG_LEVEL_DEBUG, PSTR("DGR: Checking for ack's"));
#endif // DEVICE_GROUPS_DEBUG
bool acked = true;
struct device_group_member ** flink = &device_group->device_group_members;
struct device_group_member * device_group_member;
while ((device_group_member = *flink)) {
// If we have not received an ack to our last message from this member, ...
if (device_group_member->acked_sequence != device_group->outgoing_sequence) {
// If we haven't receive an ack from this member in DGR_MEMBER_TIMEOUT ms, assume
// they're offline and remove them from the group.
if ((long)(now - device_group->member_timeout_time) >= 0) {
*flink = device_group_member->flink;
free(device_group_member);
AddLog_P2(LOG_LEVEL_DEBUG, PSTR("DGR: Member %s removed"), IPAddressToString(device_group_member->ip_address));
continue;
}
// Otherwise, unicast the last message directly to this member.
SendReceiveDeviceGroupMessage(device_group, device_group_member, device_group->message, device_group->message_length, false);
device_group_member->unicast_count++;
acked = false;
}
flink = &device_group_member->flink;
}
// If we've received an ack to the last message from all members, clear the ack check
// time and zero-out the message length.
if (acked) {
device_group->next_ack_check_time = 0;
device_group->message_length = 0; // Let _SendDeviceGroupMessage know we're done with this update
}
// If there are still members we haven't received an ack from, set the next ack check
// time. We start at 200ms and double the interval each pass with a maximum interval of
// 5 seconds.
else {
device_group->ack_check_interval *= 2;
if (device_group->ack_check_interval > 5000) device_group->ack_check_interval = 5000;
device_group->next_ack_check_time = now + device_group->ack_check_interval;
}
}
}
if (device_group->next_ack_check_time < next_check_time) next_check_time = device_group->next_ack_check_time;
}
// If it's time to send a multicast announcement for this group, send it. This is to
// announcement ourself to any members that have somehow not heard about us. We send it at the
// announcement interval plus a random number of milliseconds so that even if all the devices
// booted at the same time, they don't all multicast their announcements at the same time.
#ifdef DEVICE_GROUPS_DEBUG
AddLog_P2(LOG_LEVEL_DEBUG, PSTR("DGR: next_announcement_time=%u, now=%u"), device_group->next_announcement_time, now);
#endif // DEVICE_GROUPS_DEBUG
if ((long)(now - device_group->next_announcement_time) >= 0) {
SendReceiveDeviceGroupMessage(device_group, nullptr, device_group->message, BeginDeviceGroupMessage(device_group, DGR_FLAG_ANNOUNCEMENT, true) - device_group->message, false);
device_group->next_announcement_time = now + DGR_ANNOUNCEMENT_INTERVAL + random(10000);
}
if (device_group->next_announcement_time < next_check_time) next_check_time = device_group->next_announcement_time;
}
}
}
#endif // USE_DEVICE_GROUPS
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