CURLOPT_LOCALPORT - Man Page
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
Referenced By
curl_easy_setopt(3), CURLOPT_LOCALPORTRANGE(3).
April 26, 2023 ibcurl 8.1.1 libcurl