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[ethernet] Eliminate heap allocations in dump_config logging

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This commit is contained in:
J. Nick Koston
2025-12-25 21:50:54 -10:00
parent 9e13f6ac4c
commit 0767df02d9
1 changed files with 9 additions and 3 deletions
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12
esphome/components/ethernet/ethernet_component.cpp
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@@ -644,6 +644,12 @@ void EthernetComponent::dump_connect_params_() {
dns_ip2 = dns_getserver(1);
}
// Use stack buffers for IP address formatting to avoid heap allocations
char ip_buf[network::IP_ADDRESS_BUFFER_SIZE];
char subnet_buf[network::IP_ADDRESS_BUFFER_SIZE];
char gateway_buf[network::IP_ADDRESS_BUFFER_SIZE];
char dns1_buf[network::IP_ADDRESS_BUFFER_SIZE];
char dns2_buf[network::IP_ADDRESS_BUFFER_SIZE];
ESP_LOGCONFIG(TAG,
" IP Address: %s\n"
" Hostname: '%s'\n"
@@ -651,9 +657,9 @@ void EthernetComponent::dump_connect_params_() {
" Gateway: %s\n"
" DNS1: %s\n"
" DNS2: %s",
network::IPAddress(&ip.ip).str().c_str(), App.get_name().c_str(),
network::IPAddress(&ip.netmask).str().c_str(), network::IPAddress(&ip.gw).str().c_str(),
network::IPAddress(dns_ip1).str().c_str(), network::IPAddress(dns_ip2).str().c_str());
network::IPAddress(&ip.ip).str_to(ip_buf), App.get_name().c_str(),
network::IPAddress(&ip.netmask).str_to(subnet_buf), network::IPAddress(&ip.gw).str_to(gateway_buf),
network::IPAddress(dns_ip1).str_to(dns1_buf), network::IPAddress(dns_ip2).str_to(dns2_buf));
#if USE_NETWORK_IPV6
struct esp_ip6_addr if_ip6s[CONFIG_LWIP_IPV6_NUM_ADDRESSES];