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CURLOPT_LOCALPORT(3)                libcurl               CURLOPT_LOCALPORT(3)

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
       CURL *curl = curl_easy_init();
       if(curl) {
         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);
         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),

ibcurl 8.1.2                    April 26, 2023            CURLOPT_LOCALPORT(3)