Manpages - CURLINFO_LOCAL_PORT.3

CURLINFO_LOCAL_PORT - get the latest local port number

#include <curl/curl.h>

CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_LOCAL_PORT, long *portp);

Pass a pointer to a long to receive the local port number of the most recent connection done with this curl handle.

All

  {
    CURL *curl;
    CURLcode res;

    curl = curl_easy_init();
    if(curl) {
      curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
      res = curl_easy_perform(curl);

      if(CURLE_OK == res) {
        long port;
        res = curl_easy_getinfo(curl, CURLINFO_LOCAL_PORT, &port);

        if(CURLE_OK == res) {
          printf("We used local port: %ld\n", port);
        }
      }
      curl_easy_cleanup(curl);
    }
    return 0;
  }

Added in 7.21.0

Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

*curl_easy_getinfo*(3), *curl_easy_setopt*(3), *CURLINFO_PRIMARY_PORT*(3), *CURLINFO_LOCAL_IP*(3),