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esp_http_server : Allow binding to same address and port upon restarting server without delay

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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
This commit is contained in:
Anurag Kar 2019-04-29 18:46:20 +05:30 committed by bot
parent c5f58d11e8
commit ffad8b27a3
1 changed files with 9 additions and 0 deletions
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9
components/esp_http_server/src/httpd_main.c
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@ -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);