---
name: "CURLINFO_PRIMARY_PORT"
section: "3"
platform: "macos"
package: "curl"
version: "166.0.0.0.1"
release: "macOS 26.5"
platforms: ["linux", "macos"]
url: "https://new.carta.tech/CURLINFO_PRIMARY_PORT"
---

# CURLINFO\_PRIMARY\_PORT(3)

get the latest destination port number

## 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.

## PROTOCOLS

All

## 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);
  }
}
```

## AVAILABILITY

Added in 7.21.0

## RETURN VALUE

Returns CURLE\_OK if the option is supported, and CURLE\_UNKNOWN\_OPTION if not.

## SEE ALSO

[**CURLINFO\_LOCAL\_PORT**(3)](/CURLINFO_LOCAL_PORT/3.md), [**CURLINFO\_PRIMARY\_IP**(3)](/CURLINFO_PRIMARY_IP/3.md), [**curl\_easy\_getinfo**(3)](/curl_easy_getinfo/3.md), [**curl\_easy\_setopt**(3)](/curl_easy_setopt/3.md)