[Global]: loading init

deps/curl/docs/libcurl/opts/CURLOPT_LOCALPORTRANGE.md

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+---
+c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLOPT_LOCALPORTRANGE
+Section: 3
+Source: libcurl
+See-also:
+  - CURLOPT_INTERFACE (3)
+  - CURLOPT_LOCALPORT (3)
+---
+
+# NAME
+
+CURLOPT_LOCALPORTRANGE - number of additional local ports to try
+
+# SYNOPSIS
+
+~~~c
+#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 makes
+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 makes libcurl only do one try for the exact port
+number. Port numbers by nature are scarce resources that are busy at times so
+setting this value to something too low might cause unnecessary connection
+setup failures.
+
+# DEFAULT
+
+1
+
+# PROTOCOLS
+
+All
+
+# EXAMPLE
+
+~~~c
+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 if the option is supported, and CURLE_UNKNOWN_OPTION if not.