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 +1,76 @@
+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLOPT_DNS_INTERFACE
+Section: 3
+Source: libcurl
+See-also:
+  - CURLOPT_DNS_LOCAL_IP4 (3)
+  - CURLOPT_DNS_LOCAL_IP6 (3)
+  - CURLOPT_DNS_SERVERS (3)
+  - CURLOPT_INTERFACE (3)
+Protocol:
+  - All
+Added-in: 7.33.0
+---
+
+# NAME
+
+CURLOPT_DNS_INTERFACE - interface to speak DNS over
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DNS_INTERFACE, char *ifname);
+~~~
+
+# DESCRIPTION
+
+Pass a char pointer as parameter. Set the name of the network interface that
+the DNS resolver should bind to. This must be an interface name (not an
+address). Set this option to NULL to use the default setting (do not bind to a
+specific interface).
+
+The application does not have to keep the string around after setting this
+option.
+
+Using this option multiple times makes the last set string override the
+previous ones. Set it to NULL to disable its use again.
+
+# DEFAULT
+
+NULL
+
+# %PROTOCOLS%
+
+# 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_DNS_INTERFACE, "eth0");
+    res = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
+  }
+}
+~~~
+
+# NOTES
+
+This option requires that libcurl was built with a resolver backend that
+supports this operation. The c-ares backend is the only such one.
+
+# %AVAILABILITY%
+
+# RETURN VALUE
+
+curl_easy_setopt(3) returns a CURLcode indicating success or error.
+
+CURLE_OK (0) means everything was OK, non-zero means an error occurred, see
+libcurl-errors(3).