CURLINFO_PRIMARY_PORT(3) Library Functions Manual CURLINFO_PRIMARY_PORT(3)

CURLINFO_PRIMARY_PORT - get the latest destination port number

#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.

This is the destination port of the actual TCP or UDP connection libcurl used. If a proxy was used for the most recent transfer, this is the port number of the proxy, if no proxy was used it is the port number of the most recently accessed URL.

All

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    curl_easy_setopt(curl, CURLOPT_URL, "https://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.

CURLINFO_LOCAL_PORT(3), CURLINFO_PRIMARY_IP(3), curl_easy_getinfo(3), curl_easy_setopt(3)

2024-05-22 libcurl