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 +1,97 @@
+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLOPT_USE_SSL
+Section: 3
+Source: libcurl
+See-also:
+  - CURLOPT_PROXY_SSLVERSION (3)
+  - CURLOPT_SSLVERSION (3)
+  - CURLOPT_SSL_OPTIONS (3)
+Protocol:
+  - FTP
+  - SMTP
+  - POP3
+  - IMAP
+Added-in: 7.17.0
+---
+
+# NAME
+
+CURLOPT_USE_SSL - request using SSL / TLS for the transfer
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_USE_SSL, long level);
+~~~
+
+# DESCRIPTION
+
+Pass a long using one of the values from below, to make libcurl use your
+desired *level* of SSL for the transfer.
+
+These are all protocols that start out plain text and get "upgraded" to SSL
+using the STARTTLS command.
+
+This is for enabling SSL/TLS when you use FTP, SMTP, POP3, IMAP etc.
+
+## CURLUSESSL_NONE
+
+do not attempt to use SSL.
+
+## CURLUSESSL_TRY
+
+Try using SSL, proceed as normal otherwise. Note that server may close the
+connection if the negotiation does not succeed.
+
+## CURLUSESSL_CONTROL
+
+Require SSL for the control connection or fail with *CURLE_USE_SSL_FAILED*.
+
+## CURLUSESSL_ALL
+
+Require SSL for all communication or fail with *CURLE_USE_SSL_FAILED*.
+
+# DEFAULT
+
+CURLUSESSL_NONE
+
+# %PROTOCOLS%
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  if(curl) {
+    curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/dir/file.ext");
+
+    /* require use of SSL for this, or fail */
+    curl_easy_setopt(curl, CURLOPT_USE_SSL, CURLUSESSL_ALL);
+
+    /* Perform the request */
+    curl_easy_perform(curl);
+  }
+}
+~~~
+
+# HISTORY
+
+This option was known as CURLOPT_FTP_SSL up to 7.16.4. Supported by LDAP since
+7.81.0. Fully supported by the OpenLDAP backend only.
+
+**CURLUSESSL_*** enums became `long` types in 8.13.0, 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).