CURLOPT_PROXYPORT (3) Linux Manual Page
CURLOPT_PROXYPORT – port number the proxy listens on
Synopsis
#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXYPORT, long port);
Description
Pass a long with this option to set the proxy port to connect to unless it is specified in the proxy string CURLOPT_PROXY(3) or uses the default one. While this accepts a ‘long’, the port number is 16 bit so it can’t be larger than 65535.
