DragonFly On-Line Manual Pages
CURLOPT_PORT(3) curl_easy_setopt options CURLOPT_PORT(3)
CURLOPT_PORT - remote port number to connect to
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PORT, long number);
We discourage using this option since its scope is not obvious and hard
to predict. Set the preferred port number in the URL instead.
This option sets number to be the remote port number to connect to,
instead of the one specified in the URL or the default port for the
Usually, you just let the URL decide which port to use but this allows
the application to override that.
While this option accepts a 'long', a port number is an unsigned 16 bit
number and therefore using a port number lower than zero or over 65535
will cause a CURLE_BAD_FUNCTION_ARGUMENT error.
By default this is 0 which makes it not used. This also makes port
number zero impossible to set with this API.
Used for all protocols that speak to a port number.
CURL *curl = curl_easy_init();
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
curl_easy_setopt(curl, CURLOPT_PORT, 8080L);
ret = curl_easy_perform(curl);
libcurl 7.87.0 July 4, 2022 CURLOPT_PORT(3)