SocketTools 11 Release Notes​

  • Corrected an issue which could cause SMTP authentication to unexpectedly fail when using an OAUTH2 token.
  • Corrected an issue where a malformed HTTP response header could result in an aborted connection, and in some cases an unhandled exception would be thrown, causing the application to crash.
  • Corrected an issue which could cause TLS compatibility options to be ignored under certain circumstances. This was related to a change made in the previous release that removed deprecated security functionality.
  • Includes updates for the latest release builds of the .NET 7.0 and 8.0 assemblies for Visual Studio 2019 and Visual Studio 2022. The latest .NET SDKs are included with the updates to Visual Studio.
  • Includes a preview release of the .NET 9.0 assemblies for SDK 9.0.100-preview.1. The .NET 9.0 SDK and Visual Studio 2022 17.10 Preview 1 are required to use these assemblies.
  • Corrected an issue which could cause aborted or rejected connections to clear the thread's last error code.
  • Corrected an issue where PostData would not submit the complete payload if a string contained Unicode characters.
  • Changed the PostJson and PostXml methods to normalize single and double quote characters included in the request payload.
  • Corrected an issue which could prevent requesting a news article using very large (64-bit) message IDs.
  • Updated some internal error handling to report more specific error codes in some cases when connection to a service is rejected.
  • Optimized the heap allocations and reduced the number of reallocations made when parsing very large MIME messages.
  • Changed the internal buffering algorithm to be more adaptive for FTP and HTTP file transfers, improving transfer rates under some conditions.
  • Improved error handling in the POP3 and IMAP4 components to provide more accurate error reporting in multithreaded applications.
  • Corrected an issue which could prevent the HTTP and FTP server from starting correctly if UNC paths were used with the configuration.
  • Corrected an issue which could prevent a server logfile from being created under certain circumstances.
  • Corrected an issue which could cause a reverse DNS (PTR) lookup to fail for IPv6 addresses.
  • Corrected an issue which could cause hostname resolution to fail on systems that do not have IPv6 enabled.
  • Corrected an issue which could prevent secure TELNET connections from being negotiated using TLS.
  • Corrected an issue which could result in a memory leak when a network connection is aborted in another worker thread.
  • Corrected an issue where parsing encoded text that contained non-Latin characters could cause the application to terminate.
  • Removed legacy security related functionality implemented for Windows Vista, which is no longer a supported platform.
  • Removed legacy support for deprecated cipher suite components using TLS and SSH for secure connections.
  • Corrected an issue which could result in a memory leak if queued file transfers were canceled.
  • Corrected an issue which could cause the SmtpSubmitMessageEx function to throw an exception if the SMTPMESSAGE structure is malformed.
  • Corrected an issue which could prevent ICMP traceroutes from working correctly if an intermediate host timed-out.
  • Corrected an issue which could prevent an HTTP error payload from being returned even when the correct options are specified.
  • Corrected an issue which could cause some HTTP redirections to fail unexpectedly when redirection is enabled.
  • Corrected an issue which could set the wrong error code if an HTTP server responds with a 410 status code.
  • Relaxed some internal error checking performed with uuencoded text if it would not corrupt the encoded data.
  • Included updates for the latest release builds of the .NET 7.0 and 8.0 assemblies.
  • Minor updates to the HTML Help and PDF documentation.
  • Corrected an issue which could cause file transfers to fail when automatic file type detection was used.
  • Corrected an issue which could cause the FTP TYPE command to be repeated before a file transfer started.
  • Corrected an issue which could cause an error to be returned when getting or setting a HTTP content type.
  • Corrected an issue which could prevent a chunked HTTP response from being processed correctly when a resource was redirected.
  • Corrected an issue which could cause a request payload to become corrupted when a resource is redirected to another domain.
  • Corrected an issue where the HttpSubmitRequest function could fail with any request type other than HTTP_REQUEST_GET.
  • Corrected an issue where WebEnumApplications and related functions were not exported correctly which could result in unexpected behavior.
  • Corrected an issue which could cause a server application to be flooded with error events if a client performed a hard close on their connection.
  • Corrected an issue which could result in incorrect publication dates being returned when processing a news feed.
  • Corrected an issue with the HttpClient components where some methods could fail when a resource was not explicitly specified as an argument.
  • Corrected an issue with the .NET server classes which could result in an exception being thrown when multiple clients simultaneously disconnected from the server.
  • Corrected an issue where feed URIs would not be recognized by the HTTP components.
  • Corrected an issue where the HttpClient.UserAgent property may not return the correct value.
  • Corrected an issue where the FtpGetAutoFileType function and FtpClient.GetFileType method would not correctly identify UTF-8 encoded text files.
  • Corrected an issue where attempting to determine the default file transfer type could have unexpected results if a directory name was specified.
  • Corrected an issue where mailbox names with Unicode characters may not have the correct values in the InternetMail .NET class.
  • Updated and added several missing interface definitions in the native DLL type libraries.
  • Added the HttpSetRequestHeaders function and HttpClient.AddHeaders method which can be used to set multiple request headers.
  • Added the HttpGetTextEx function which provides additional options when returning text content in a string buffer.
  • Added the InetGetUrlHostName and InetConnectUrl functions to simplify establishing TCP connections using a URL.
  • Added missing error codes in the interface definitions for the ActiveX controls.
  • Extended the GetText and PutText methods in the FtpClient and HttpClient .NET classes to support an optional code page parameter.
  • Added support for the GetText and PutText methods with the FileTransfer .NET class and ActiveX control.
  • Additional parameter checks are performed when initializing SocketTools components to prevent a situation where a valid runtime license may not be accepted.
  • Corrected an issue with the License Manager which would check for older SocketTools licenses by default.
  • Updated the C/C++ include file to address compilation warnings when building a project using Microsoft Foundation Classes (MFC).
  • Improved the Library Edition function declarations for several languages and FreeBasic 1.10 is now a supported language.
  • Added missing documentation for the CodePage property with the FTP and HTTP ActiveX controls.
  • Added missing documentation for the GetText and PutText methods with the FTP and HTTP .NET classes and ActiveX controls.
  • Updated some of the documentation to explicitly note when Unicode strings are automatically converted to UTF-8 encoded text.
  • Updated missing topics in the HTML help file which were not linked correctly in the contents table.
  • Corrected a critical issue with secure connections which could cause the TLS stream buffers to be corrupted if the buffer size exceeded 16KiB.
  • Updated the C++ headers to eliminate strict warnings with the latest language standards.
  • Updated C++ class implementations to remove ambiguity with certain Unicode API calls.
  • Corrected an issue which could result in an incomplete message being sent using the Broadcast method with the InternetServer components.
  • Added additional parameter checking with networking I/O functions and normalized the error codes returned when an invalid buffer address or content length is specified.
  • Minor updates and improvements to the HTML Help documentation.
  • Corrected an issue with the IMAP components which prevented encoded UTF-7 folder names from being converted to Unicode.
  • Corrected an issue with the MIME components which mapped certain Asian character sets to the wrong code page.
  • Corrected an issue where some error conditions would not return a valid description of the error when throwing an exception.
  • Corrected an issue which could potentially result in heap corruption when decoding base64 or quoted-printable content.
  • Corrected an issue which could result in a memory leak when converting certain non-Latin UTF-8 character sequences to UTF-16 Unicode.
  • Corrected a buffer overrun could cause an unhandled exception when retrieving very large email messages using POP3 or IMAP4.
  • Corrected an issue where the HTTP components may not set a valid error code when the server aborted its connection to the client.
  • Corrected a rare deadlock condition with the FTP and HTTP server components when updating internal client session data.
  • Improved the handling of malformed MIME messages which contained invalid quoted-printable encoding.
  • Expanded support for several additional Asian and eastern European character sets with the MIME components.
  • Updated for the current Visual Studio 2022 17.6.5 release and the .NET 7.0.9 release SDK (7.0.306)
  • Updated the .NET 6.0 components to use the current .NET 6.0.20 LTS release SDK (6.0.412)
  • Updated the .NET 8.0 components to use the latest Preview 6 release SDK (8.0.100-preview.6.23330.14)
  • Minor updates and improvements to the HTML Help and PDF documentation.
  • Corrected an issue which could result in an undefined error in the client when a TLS handshake failed.
  • Corrected an issue which could prevent a client session from being released until all sessions in other threads have disconnected.
  • Corrected an issue which could cause nameserver queries to fail with certain internationalized domain names.
  • Corrected an issue which could result in a rare deadlock condition when creating simultaneous secure client connections.
  • Corrected an issue which could cause memory corruption when attempting to convert specific invalid UTF-8 encoded strings.
  • Corrected an issue with the MIME components which could prevent base64 encoded content from being decoded correctly.
  • Corrected an issue with the FTP and HTTP server components which could prevent files using UTF-8 encoded names from being transferred.
  • Corrected an issue with the FTP server component which caused the PWD command to not return a complete UTF-8 encoded path.
  • Corrected an issue with the FTP server component which would allow a Unicode path to be created but not deleted.
  • Modified the FTP and HTTP server components to permit usernames and passwords using Unicode characters.
  • Modified the FTP server components to allow an atsign (@) in a username.
  • Updated the .NET 8.0 components to use the Preview 5 release (8.0.100-preview.5.23303.2)
  • Added support for the HTTP/2.0 protocol in all HTTP client components.
  • Updated security options for TLS 1.2 and later versions and SSH 2.0 to use cipher suites available in Windows 11 and Windows Server 2022. Older, less secure cipher suites have been deprecated and will not be used when establishing a connection. A fallback option is available to connect to legacy servers using TLS 1.0.
  • The default security protocol and cipher suite selection for all secure connections have been updated for Windows 10.
  • Assemblies for the .NET 8.0 Preview have been included with this installation. To build applications using .NET 8.0 you will need install the Visual Studio 2022 Preview. Microsoft has scheduled the release of the .NET 8.0 Framework in November, 2023.
  • Assemblies for the .NET 6.0 and .NET 7.0 Framework releases have been updated with support for the current release of Visual Studio 2022.
  • Expanded support for internationalization and Unicode for all components. This also extends to the ANSI versions of exported functions which will now accept UTF-8 encoded string parameters to provide better support for Unicode with legacy applications.
  • Improved the processing of large MIME messages with a complex message structure which includes multipart/alternative messages and large file attachments. The limit on the number of attached files in a message have been removed.
  • Improved the handling of mail messages which include non-Latin character sets and expanded support for alternative character sets used with Japanese, Chinese and Korean languages. Messages which contain a mix of UTF-8 and ANSI character sets will be internally converted to use Unicode for uniformity of processing.
  • Improved the transfer speeds for large files using the FTP and HTTP components over high-speed networks and removed the bandwidth limiting feature for high-priority transfers. A high precision mode is available when measuring transfer rates.
  • Improved internal memory management to limit fragmentation of the heap and reduce the process and client session heap size after references to those objects have been released. Each component shares a private heap which is isolated from the general process heap used by the application.
  • Added a new file transfer queue API for the FTP and HTTP libraries to support the batch upload and download of files.
  • Addressed an issue which could cause the SocketTools server components to stop accepting connections and potentially throw an exception if instance of the server was destroyed while multiple client sessions were in the process of disconnecting from the server.
  • Improved the handling of aborted client connections to a server, particularly when multiple clients lose connection to the server at the same time. This addresses a situation where the server could potentially stop accepting new connections and would not release the client socket handles allocated for those sessions.
  • Improved the internal server monitoring thread to be less resource intensive with a large number of transitory client connections. This change should particularly improve performance with the HTTP server when accepting many client connections over a short period of time.
  • Improved the handling of malformed MIME messages which contain invalid header blocks or a malformed multipart structure, including invalid boundary identifiers used to define the different parts of a multipart/alternative message.
  • Corrected an issue which could cause file transfers to fail if a specified restart offset, used with resumed file transfers. was greater than 4GB.
  • Removed support for deprecated Diffie-Hellman group exchange algorithms which could prevent a client from establishing a SSH 2.0 connection. SocketTools will no longer offer older, less secure security algorithms when connecting with a server. All support for SSH 1.0 has been removed.
  • New installers and Windows Installer (MSI) packages have been created. The new installers provide an improved installation experience and provide support silent installation and a streamlined update process. The MSI installer packages are included to assist with easier redistribution of your application.
  • Updating or uninstalling SocketTools will no longer display error messages about being unable to unregister or remove 64-bit components.
  • Examples were added for Visual Studio 2022 and Library Edition examples were updated to use the current toolset. Note some examples use Microsoft Foundation Classes (MFC) which should be installed for the current toolset. SocketTools will continue to support both MFC and ATL based projects.
  • The minimum supported version for Windows 10 is Windows 10 21H2. Earlier versions of Windows 10 are no longer supported and won't receive security updates from Microsoft, although SocketTools will continue to work on those platforms.
  • Support for Windows XP and Windows Vista have been removed. These platforms are no longer secure and do not support current versions of TLS. This release of SocketTools uses internal API functions which are not available to Windows XP and the SocketTools components cannot be loaded on that platform.
  • New HTML Help documentation, PDF documentation and a README.md file have been included which provides information about the current release.

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