curlopt_localportrange(3) mojave man page | unix.com

CURLOPT_LOCALPORTRANGE(3)				     curl_easy_setopt options					 CURLOPT_LOCALPORTRANGE(3)

NAME
       CURLOPT_LOCALPORTRANGE - number of additional local ports to try

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_LOCALPORTRANGE,
				 long range);

DESCRIPTION
       Pass  a	long. The range argument is the number of attempts libcurl will make to find a working local port number. It starts with the given
       CURLOPT_LOCALPORT(3) and adds one to the number for each retry. Setting this option to 1 or below will make libcurl do only one try for the
       exact  port number. Port numbers by nature are scarce resources that will be busy at times so setting this value to something too low might
       cause unnecessary connection setup failures.

DEFAULT
       1

PROTOCOLS
       All

EXAMPLE
       TODO

AVAILABILITY
       Added in 7.15.2

RETURN VALUE
       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO
       CURLOPT_LOCALPORT(3), CURLOPT_INTERFACE(3),

libcurl 7.54.0							 February 03, 2016					 CURLOPT_LOCALPORTRANGE(3)