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Account for size of Envelope when allocating buffer. (#4819)

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* Account for size of Envelope when allocating buffer.

INFO  | 09:29:20 568 [mqtt] Subscribing to msh/2/e/LongFast/+
INFO  | 09:29:20 568 [mqtt] Subscribing to msh/2/json/LongFast/+
INFO  | 09:29:20 568 [mqtt] Subscribing to msh/2/e/PKI/+
DEBUG | 09:29:20 568 [mqtt] Publishing enqueued MQTT message
ERROR | 09:29:20 568 [mqtt] Panic: can't encode protobuf reason='bytes size exceeded'

assert failed: size_t pb_encode_to_bytes(uint8_t*, size_t, const pb_msgdesc_t*, const void*) mesh-pb-constants.cpp:18 (0)

* save some mem
This commit is contained in:
Thomas Göttgens 2024-09-26 00:13:04 +02:00 committed by GitHub
parent baf9cf5a59
commit 118809fbfc
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GPG Key ID: B5690EEEBB952194
1 changed files with 3 additions and 6 deletions
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9
src/mqtt/MQTT.cpp
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@ -32,6 +32,9 @@ static MemoryDynamic<meshtastic_ServiceEnvelope> staticMqttPool;
Allocator<meshtastic_ServiceEnvelope> &mqttPool = staticMqttPool; Allocator<meshtastic_ServiceEnvelope> &mqttPool = staticMqttPool;
// FIXME - this size calculation is super sloppy, but it will go away once we dynamically alloc meshpackets
static uint8_t bytes[meshtastic_MqttClientProxyMessage_size + 30]; // 12 for channel name and 16 for nodeid
void MQTT::mqttCallback(char *topic, byte *payload, unsigned int length) void MQTT::mqttCallback(char *topic, byte *payload, unsigned int length)
{ {
mqtt->onReceive(topic, payload, length); mqtt->onReceive(topic, payload, length);
@ -482,9 +485,7 @@ void MQTT::publishQueuedMessages()
{ {
if (!mqttQueue.isEmpty()) { if (!mqttQueue.isEmpty()) {
LOG_DEBUG("Publishing enqueued MQTT message\n"); LOG_DEBUG("Publishing enqueued MQTT message\n");
// FIXME - this size calculation is super sloppy, but it will go away once we dynamically alloc meshpackets
meshtastic_ServiceEnvelope *env = mqttQueue.dequeuePtr(0); meshtastic_ServiceEnvelope *env = mqttQueue.dequeuePtr(0);
static uint8_t bytes[meshtastic_MqttClientProxyMessage_size];
size_t numBytes = pb_encode_to_bytes(bytes, sizeof(bytes), &meshtastic_ServiceEnvelope_msg, env); size_t numBytes = pb_encode_to_bytes(bytes, sizeof(bytes), &meshtastic_ServiceEnvelope_msg, env);
std::string topic; std::string topic;
if (env->packet->pki_encrypted) { if (env->packet->pki_encrypted) {
@ -570,8 +571,6 @@ void MQTT::onSend(const meshtastic_MeshPacket &mp, const meshtastic_MeshPacket &
} }
if (moduleConfig.mqtt.proxy_to_client_enabled || this->isConnectedDirectly()) { if (moduleConfig.mqtt.proxy_to_client_enabled || this->isConnectedDirectly()) {
// FIXME - this size calculation is super sloppy, but it will go away once we dynamically alloc meshpackets
static uint8_t bytes[meshtastic_MqttClientProxyMessage_size];
size_t numBytes = pb_encode_to_bytes(bytes, sizeof(bytes), &meshtastic_ServiceEnvelope_msg, env); size_t numBytes = pb_encode_to_bytes(bytes, sizeof(bytes), &meshtastic_ServiceEnvelope_msg, env);
std::string topic = cryptTopic + channelId + "/" + owner.id; std::string topic = cryptTopic + channelId + "/" + owner.id;
LOG_DEBUG("MQTT Publish %s, %u bytes\n", topic.c_str(), numBytes); LOG_DEBUG("MQTT Publish %s, %u bytes\n", topic.c_str(), numBytes);
@ -666,8 +665,6 @@ void MQTT::perhapsReportToMap()
&meshtastic_MapReport_msg, &mapReport); &meshtastic_MapReport_msg, &mapReport);
se->packet = mp; se->packet = mp;
// FIXME - this size calculation is super sloppy, but it will go away once we dynamically alloc meshpackets
static uint8_t bytes[meshtastic_MqttClientProxyMessage_size];
size_t numBytes = pb_encode_to_bytes(bytes, sizeof(bytes), &meshtastic_ServiceEnvelope_msg, se); size_t numBytes = pb_encode_to_bytes(bytes, sizeof(bytes), &meshtastic_ServiceEnvelope_msg, se);
LOG_INFO("MQTT Publish map report to %s\n", mapTopic.c_str()); LOG_INFO("MQTT Publish map report to %s\n", mapTopic.c_str());