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CURLOPT_LOCALPORT(3)       curl_easy_setopt options       CURLOPT_LOCALPORT(3)

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, 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), libcurl 7.65.1 January 31, 2019 CURLOPT_LOCALPORT(3)

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