CURLINFO_PRIMARY_PORT man page

#include <curl/curl.h>

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

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

All

CURL *curl = curl_easy_init();
if(curl) {
  CURLcode res;
  curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
  res = curl_easy_perform(curl);
  if(res == CURLE_OK) {
    long port;
    res = curl_easy_getinfo(curl, CURLINFO_PRIMARY_PORT, &port);
    if(!res)
      printf("Connected to remote port: %ld\n", port);
  }
  curl_easy_cleanup(curl);
}

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),

curl_easy_getinfo(3), CURLINFO_LOCAL_PORT(3), CURLINFO_PRIMARY_IP(3).