curl/docs/libcurl/opts/CURLINFO_PRIMARY_PORT.md

c	SPDX-License-Identifier	Title	Section	Source	See-also	Protocol	Added-in
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.	curl	CURLINFO_PRIMARY_PORT	3	libcurl	CURLINFO_LOCAL_PORT (3) CURLINFO_PRIMARY_IP (3) curl_easy_getinfo (3) curl_easy_setopt (3)	All	7.21.0

NAME

CURLINFO_PRIMARY_PORT - get the latest destination port number

SYNOPSIS

#include <curl/curl.h>

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

DESCRIPTION

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.

EXAMPLE

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);
  }
}

RETURN VALUE

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