CURLINFO_LOCAL_PORT3

Usage

#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_LOCAL_PORT, long *portp);

Overview

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

If the connection was done using QUIC, the port number is a UDP port number, otherwise it is a TCP port number.

If no connection was established or if the protocol does not use ports, -1 is returned.

Protocols

This functionality affects quic and tcp

Examples

int main(void)
{
  CURL *curl;
  CURLcode result;
  curl = curl_easy_init();
  if(curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    result = curl_easy_perform(curl);
    if(result == CURLE_OK) {
      long port;
      result = curl_easy_getinfo(curl, CURLINFO_LOCAL_PORT, &port);
      if(result == CURLE_OK) {
        printf("We used local port: %ld\n", port);
      }
    }
    curl_easy_cleanup(curl);
  }
  return 0;
}

Return value

curl_easy_getinfo(3) returns a CURLcode indicating success or error.

CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).