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Flatbuffer validation

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This commit is contained in:
Johnathon Slightham
2025-10-15 21:55:20 -04:00
parent 11c3604438
commit 2b235524fe
4 changed files with 16 additions and 11 deletions
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4
components/flatbuffers/TopologyMessageBuilder.cpp
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@@ -30,8 +30,4 @@ namespace Flatbuffers {
return {builder_.GetBufferPointer(), builder_.GetSize()};
}
const Messaging::TopologyMessage* TopologyMessageBuilder::parse_topology_message(const uint8_t* buffer) {
return flatbuffers::GetRoot<Messaging::TopologyMessage>(buffer);
}
}

2
components/flatbuffers/include/TopologyMessageBuilder.h
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@@ -23,8 +23,6 @@ namespace Flatbuffers {
const std::vector<uint8_t>& channel_to_module,
const std::vector<int8_t>& orientation_to_module);
static const Messaging::TopologyMessage* parse_topology_message(const uint8_t* buffer);
private:
flatbuffers::FlatBufferBuilder builder_;
};

7
components/rpc/CommunicationRouter.cpp
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@@ -100,6 +100,13 @@ void CommunicationRouter::update_leader() {
}
void CommunicationRouter::route(uint8_t* buffer, const size_t length) const {
flatbuffers::Verifier verifier(buffer, length);
bool ok = Messaging::VerifyMPIMessageBuffer(verifier);
if (!ok) { // This could be moved to just be called on wireline data to save cpu cycles.
ESP_LOGW(TAG, "route: got an invalid MPI message, disregarding");
return;
}
const auto& mpi_message = Flatbuffers::MPIMessageBuilder::parse_mpi_message(buffer);
if (mpi_message->destination() == m_module_id) {

14
components/rpc/TCPServer.cpp
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@@ -124,7 +124,8 @@ TCPServer::~TCPServer() {
const auto that = static_cast<TCPServer *>(args);
while (true) {
vTaskDelay(1 / portTICK_PERIOD_MS); // Avoid starving other threads
vTaskDelay(0); // Avoid starving other threads
fd_set readfds;
FD_ZERO(&readfds);
int max_fd = -1;
@@ -136,13 +137,18 @@ TCPServer::~TCPServer() {
}
xSemaphoreGive(that->m_mutex);
timeval timeout = {0, 100000}; // 100 ms timeout
// todo: Select seems to be timing out the watchdog, even though we have a 50ms timeout.
// Potentially select is not respecting our timeout?
timeval timeout = {0, 50000}; // 50 ms timeout
int ret = select(max_fd + 1, &readfds, nullptr, nullptr, &timeout);
vTaskDelay(0); // Avoid starving other threads
if (ret > 0) {
xSemaphoreTake(that->m_mutex, portMAX_DELAY);
std::vector<int> to_remove;
for (int sock : that->m_clients) {
vTaskDelay(0); // Avoid starving other threads
if (FD_ISSET(sock, &readfds)) {
// Handle socket
auto buffer = std::make_unique<std::vector<uint8_t>>();
@@ -160,7 +166,7 @@ TCPServer::~TCPServer() {
ESP_LOGE(TAG, "Error occurred during receiving: errno %d\n", errno);
to_remove.emplace_back(sock);
} else if (0 == len) {
ESP_LOGW(TAG, "Connection closed\n");
ESP_LOGI(TAG, "TCP Connection closed\n");
close(sock);
to_remove.emplace_back(sock);
} else {
@@ -211,8 +217,6 @@ bool TCPServer::authenticate_client(int sock) {
}
int TCPServer::send_msg(char *buffer, uint32_t length) const {
// todo: should we assign a unique rank to each pc?
if (!is_network_connected()) {
return -1;
}