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[api] Add configurable connection limits (#10939)

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This commit is contained in:
J. Nick Koston
2025-09-30 04:24:19 -05:00
committed by GitHub
parent 96868aa754
commit 6018f5f5d1
3 changed files with 51 additions and 4 deletions
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18
esphome/components/api/api_server.cpp
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@@ -87,7 +87,7 @@ void APIServer::setup() {
return;
}
err = this->socket_->listen(4);
err = this->socket_->listen(this->listen_backlog_);
if (err != 0) {
ESP_LOGW(TAG, "Socket unable to listen: errno %d", errno);
this->mark_failed();
@@ -140,9 +140,19 @@ void APIServer::loop() {
while (true) {
struct sockaddr_storage source_addr;
socklen_t addr_len = sizeof(source_addr);
auto sock = this->socket_->accept_loop_monitored((struct sockaddr *) &source_addr, &addr_len);
if (!sock)
break;
// Check if we're at the connection limit
if (this->clients_.size() >= this->max_connections_) {
ESP_LOGW(TAG, "Max connections (%d), rejecting %s", this->max_connections_, sock->getpeername().c_str());
// Immediately close - socket destructor will handle cleanup
sock.reset();
continue;
}
ESP_LOGD(TAG, "Accept %s", sock->getpeername().c_str());
auto *conn = new APIConnection(std::move(sock), this);
@@ -206,8 +216,10 @@ void APIServer::loop() {
void APIServer::dump_config() {
ESP_LOGCONFIG(TAG,
"Server:\n"
" Address: %s:%u",
network::get_use_address().c_str(), this->port_);
" Address: %s:%u\n"
" Listen backlog: %u\n"
" Max connections: %u",
network::get_use_address().c_str(), this->port_, this->listen_backlog_, this->max_connections_);
#ifdef USE_API_NOISE
ESP_LOGCONFIG(TAG, " Noise encryption: %s", YESNO(this->noise_ctx_->has_psk()));
if (!this->noise_ctx_->has_psk()) {