Update networking layer w/ CURL and emscripten impl

2025-11-08 01:50:36 +11:00
parent a17925904d
commit f6874dc55a
4105 changed files with 694617 additions and 179 deletions
@@ -0,0 +1,74 @@
+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLOPT_DNS_SHUFFLE_ADDRESSES
+Section: 3
+Source: libcurl
+See-also:
+  - CURLOPT_DNS_CACHE_TIMEOUT (3)
+  - CURLOPT_IPRESOLVE (3)
+Protocol:
+  - All
+Added-in: 7.60.0
+---
+
+# NAME
+
+CURLOPT_DNS_SHUFFLE_ADDRESSES - shuffle IP addresses for hostname
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DNS_SHUFFLE_ADDRESSES, long onoff);
+~~~
+
+# DESCRIPTION
+
+Pass a long set to 1 to enable this option.
+
+When a name is resolved and more than one IP address is returned, this
+function shuffles the order of all returned addresses so that they are used in
+a random order. This is similar to the ordering behavior of the legacy
+gethostbyname function which is no longer used on most platforms.
+
+Addresses are not reshuffled if name resolution is completed using the DNS
+cache. CURLOPT_DNS_CACHE_TIMEOUT(3) can be used together with this
+option to reduce DNS cache timeout or disable caching entirely if frequent
+reshuffling is needed.
+
+Since the addresses returned are randomly reordered, the order is not in
+accordance with RFC 3484 or any other deterministic order that may be
+generated by the system's name resolution implementation. This may have
+performance impacts and may cause IPv4 to be used before IPv6 or vice versa.
+
+# DEFAULT
+
+0 (disabled)
+
+# %PROTOCOLS%
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  if(curl) {
+    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
+    curl_easy_setopt(curl, CURLOPT_DNS_SHUFFLE_ADDRESSES, 1L);
+
+    curl_easy_perform(curl);
+
+    /* always cleanup */
+    curl_easy_cleanup(curl);
+  }
+}
+~~~
+
+# %AVAILABILITY%
+
+# RETURN VALUE
+
+CURLE_OK or an error such as CURLE_UNKNOWN_OPTION.