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 +1,85 @@
+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLOPT_FTP_SSL_CCC
+Section: 3
+Source: libcurl
+Protocol:
+  - FTP
+See-also:
+  - CURLOPT_FTPSSLAUTH (3)
+  - CURLOPT_PROTOCOLS_STR (3)
+  - CURLOPT_USE_SSL (3)
+Added-in: 7.16.1
+---
+
+# NAME
+
+CURLOPT_FTP_SSL_CCC - switch off SSL again with FTP after auth
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTP_SSL_CCC,
+                          long how);
+~~~
+
+# DESCRIPTION
+
+If enabled, this option makes libcurl use CCC (Clear Command Channel). It
+shuts down the SSL/TLS layer after authenticating. The rest of the control
+channel communication remains unencrypted. This allows NAT routers to follow
+the FTP transaction. Pass a long using one of the values below
+
+## CURLFTPSSL_CCC_NONE
+
+do not attempt to use CCC.
+
+## CURLFTPSSL_CCC_PASSIVE
+
+Do not initiate the shutdown, but wait for the server to do it. Do not send a
+reply.
+
+## CURLFTPSSL_CCC_ACTIVE
+
+Initiate the shutdown and wait for a reply.
+
+# DEFAULT
+
+CURLFTPSSL_CCC_NONE
+
+# %PROTOCOLS%
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  if(curl) {
+    CURLcode res;
+    curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/file.txt");
+    curl_easy_setopt(curl, CURLOPT_USE_SSL, CURLUSESSL_CONTROL);
+    /* go back to clear-text FTP after authenticating */
+    curl_easy_setopt(curl, CURLOPT_FTP_SSL_CCC, CURLFTPSSL_CCC_ACTIVE);
+    res = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
+  }
+}
+~~~
+
+# HISTORY
+
+**CURLFTPSSL_*** enums became `long` types in 8.16.0, prior to this version
+a `long` cast was necessary when passed to curl_easy_setopt(3).
+
+# %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).