CURLOPT_LOCALPORT

Section: curl_easy_setopt options (3)
Updated: May 31, 2017
Index Return to Main Contents

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NAME

CURLOPT_LOCALPORT - set local port number to use for socket  

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_LOCALPORT, long port);  

DESCRIPTION

Pass a long. This sets the local port number of the socket used for the connection. This can be used in combination with CURLOPT_INTERFACE(3) and you are recommended to use CURLOPT_LOCALPORTRANGE(3) as well when this option is set. Valid port numbers are 1 - 65535.  

DEFAULT

0, disabled - use whatever the system thinks is fine  

PROTOCOLS

All  

EXAMPLE

CURL *curl = curl_easy_init();
if(curl) {
  curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/foo.bin");
  curl_easy_setopt(curl, CURLOPT_LOCALPORT, 8080L);
  /* and try 20 more ports following that */
  curl_easy_setopt(curl, CURLOPT_LOCALPORTRANGE, 20L);
  ret = curl_easy_perform(curl);
  curl_easy_cleanup(curl);
}

 

AVAILABILITY

Added in 7.15.2  

RETURN VALUE

Returns CURLE_OK  

SEE ALSO

CURLOPT_LOCALPORTRANGE(3), CURLOPT_INTERFACE(3),

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Index

NAME

SYNOPSIS

DESCRIPTION

DEFAULT

PROTOCOLS

EXAMPLE

AVAILABILITY

RETURN VALUE

SEE ALSO