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---
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
SPDX-License-Identifier: curl
Title: CURLINFO_LOCAL_IP
Section: 3
Source: libcurl
See-also:
- CURLINFO_LOCAL_PORT (3)
- CURLINFO_PRIMARY_IP (3)
- curl_easy_getinfo (3)
- curl_easy_setopt (3)
Protocol:
- TCP
- QUIC
Added-in: 7.21.0
---
# NAME
CURLINFO_LOCAL_IP - local IP address of last connection
# SYNOPSIS
~~~c
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_LOCAL_IP, char **ip);
~~~
# DESCRIPTION
Pass a pointer to a char pointer to receive the pointer to a null-terminated
string holding the IP address of the local end of most recent connection done
with this **curl** handle. This string may be IPv6 when that is enabled. Note
that you get a pointer to a memory area that is reused at next request so you
need to copy the string if you want to keep the information.
The **ip** pointer is NULL or points to private memory. You **must not** free
it. The memory gets freed automatically when you call curl_easy_cleanup(3) on
the corresponding curl handle.
# %PROTOCOLS%
# EXAMPLE
~~~c
int main(void)
{
char *ip;
CURLcode result;
CURL *curl = curl_easy_init();
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Perform the transfer */
result = curl_easy_perform(curl);
/* Check for errors */
if((result == CURLE_OK) &&
!curl_easy_getinfo(curl, CURLINFO_LOCAL_IP, &ip) && ip) {
printf("Local IP: %s\n", ip);
}
/* always cleanup */
curl_easy_cleanup(curl);
}
~~~
# %AVAILABILITY%
# 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).
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