NAME

       CURLOPT_LOCALPORT - 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

       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           CURLcode res;
           curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
           curl_easy_setopt(curl, CURLOPT_LOCALPORT, 49152L);
           /* and try 20 more ports following that */
           curl_easy_setopt(curl, CURLOPT_LOCALPORTRANGE, 20L);
           res = curl_easy_perform(curl);
           curl_easy_cleanup(curl);
         }
       }

AVAILABILITY

       Added in 7.15.2

RETURN VALUE

       Returns CURLE_OK

SEE ALSO

       CURLINFO_LOCAL_PORT(3), CURLOPT_INTERFACE(3), CURLOPT_LOCALPORTRANGE(3)