CURLINFO\_LOCAL\_PORT(3) Library Functions Manual CURLINFO\_LOCAL\_PORT(3)

# [NAME](#NAME)

CURLINFO\_LOCAL\_PORT - latest local port number

# [SYNOPSIS](#SYNOPSIS)

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

# [DESCRIPTION](#DESCRIPTION)

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](#PROTOCOLS)

This functionality affects quic and tcp

# [EXAMPLE](#EXAMPLE)

```
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;
}
```

# [AVAILABILITY](#AVAILABILITY)

Added in curl 7.21.0

# [RETURN VALUE](#RETURN_VALUE)

[*curl\_easy\_getinfo(3)*](/man/os/curl/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)*](/man/os/curl/libcurl-errors.3).

# [SEE ALSO](#SEE_ALSO)

[**CURLINFO\_LOCAL\_IP**(3)](/man/os/curl/CURLINFO_LOCAL_IP.3), [**CURLINFO\_PRIMARY\_PORT**(3)](/man/os/curl/CURLINFO_PRIMARY_PORT.3), [**curl\_easy\_getinfo**(3)](/man/os/curl/curl_easy_getinfo.3), [**curl\_easy\_setopt**(3)](/man/os/curl/curl_easy_setopt.3)

2026-10-01 libcurl

---

Document: CURLINFO_LOCAL_PORT(3) from curl 8.22.0-r4 (Chainguard OS)
Source: https://github.com/curl/curl.git