CURLINFO_LOCAL_IP

Section: C Library Functions (3)
Updated: 202-0-19
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NAME

CURLINFO_LOCAL_IP - local IP address of last connection  

SYNOPSIS

#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

This functionality affects quic and tcp  

EXAMPLE

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: %sn", ip);
  }

  /* always cleanup */
  curl_easy_cleanup(curl);
}

 

AVAILABILITY

Added in curl 7.21.0  

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).  

SEE ALSO

CURLINFO_LOCAL_PORT(3), CURLINFO_PRIMARY_IP(3), curl_easy_getinfo(3), curl_easy_setopt(3)

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Index

NAME

SYNOPSIS

DESCRIPTION

PROTOCOLS

EXAMPLE

AVAILABILITY

RETURN VALUE

SEE ALSO