esp_http_server : Allow binding to same address and port upon restarting server without delay
Issue : Restarting the server without 30sec delay between httpd_stop() and httpd_start() causes EADDRINUSE error Resolution : Use setsockopt() to enable SO_REUSEADDR on listener socket Closes https://github.com/espressif/esp-idf/issues/3381
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@ -254,6 +254,15 @@ static esp_err_t httpd_server_init(struct httpd_data *hd)
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.sin6_port = htons(hd->config.server_port)
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.sin6_port = htons(hd->config.server_port)
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};
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};
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/* Enable SO_REUSEADDR to allow binding to the same
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* address and port when restarting the server */
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int enable = 1;
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if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &enable, sizeof(enable)) < 0) {
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/* This will fail if CONFIG_LWIP_SO_REUSE is not enabled. But
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* it does not affect the normal working of the HTTP Server */
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ESP_LOGW(TAG, LOG_FMT("error enabling SO_REUSEADDR (%d)"), errno);
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}
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int ret = bind(fd, (struct sockaddr *)&serv_addr, sizeof(serv_addr));
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int ret = bind(fd, (struct sockaddr *)&serv_addr, sizeof(serv_addr));
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if (ret < 0) {
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if (ret < 0) {
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ESP_LOGE(TAG, LOG_FMT("error in bind (%d)"), errno);
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ESP_LOGE(TAG, LOG_FMT("error in bind (%d)"), errno);
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