diff --git a/components/esp_http_server/src/httpd_main.c b/components/esp_http_server/src/httpd_main.c index d361bfee6..e19ac9af5 100644 --- a/components/esp_http_server/src/httpd_main.c +++ b/components/esp_http_server/src/httpd_main.c @@ -254,6 +254,15 @@ static esp_err_t httpd_server_init(struct httpd_data *hd) .sin6_port = htons(hd->config.server_port) }; + /* Enable SO_REUSEADDR to allow binding to the same + * address and port when restarting the server */ + int enable = 1; + if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &enable, sizeof(enable)) < 0) { + /* This will fail if CONFIG_LWIP_SO_REUSE is not enabled. But + * it does not affect the normal working of the HTTP Server */ + ESP_LOGW(TAG, LOG_FMT("error enabling SO_REUSEADDR (%d)"), errno); + } + int ret = bind(fd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)); if (ret < 0) { ESP_LOGE(TAG, LOG_FMT("error in bind (%d)"), errno);