Update documentation for SSH tunneling improvements

- Added SSH tunneling enhancements to CHANGELOG.md v1.4.6
- Updated DOCUMENTATION.md with SSH tunnel handling improvements
- Updated README.md changelog section with tunnel fixes
- Updated TODO.md with completed SSH tunneling tasks

Includes fixes for:
- EBADF error handling
- SSH client disconnection handling
- Socket validation improvements
- SSH tunneling timing issues
- wssshc architectural fixes

CHANGELOG.md

@@ -10,10 +10,21 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - **Code Refactoring and Library Architecture**: Major refactoring to eliminate code duplication
   - Created shared libraries: `wssshlib.h/.c`, `websocket.h/.c`, `wssh_ssl.h/.c`, `tunnel.h/.c`
-  - Extracted ~1500+ lines of duplicate code between wsssh.c and wsscp.c
+  - Extracted ~1500+ lines of duplicate code between wsssh.c and wssshc.c
   - Improved maintainability and code organization with modular architecture
   - Enhanced build system with proper library dependencies
 
+- **SSH Tunneling Improvements**: Enhanced SSH tunnel handling and error recovery
+  - Added specific handling for EBADF (Bad file descriptor) errors
+  - Improved error handling in handle_tunnel_data for SSH client disconnections
+  - Removed aggressive socket validation causing SSH client disconnections
+  - Fixed SSH client socket invalidation issue in handle_tunnel_data
+  - Added missing SSH client accept() logic in wsssh socket handling
+  - Fixed SSH tunneling timing issue with proper data buffering
+  - Implemented correct SSH tunneling architecture for wssshc
+  - Fixed critical architectural issue in wssshc tunnel handling
+  - Enhanced error handling for broken SSH connections
+
 - **Port Option Behavior Correction**: Fixed critical port option behavior
   - `-p`/`-P` options now correctly specify wssshd server port (not SSH/SCP server port)
   - Removed misleading "passed through to ssh/scp" documentation
@@ -36,6 +47,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Technical Details
 - **Library Dependencies**: New build system properly links wsssh and wsscp against shared libraries
 - **Code Deduplication**: Eliminated redundant implementations of WebSocket, SSL, and tunnel functions
+- **SSH Tunnel Stability**: Enhanced tunnel reliability with improved error handling and connection management
 - **Port Handling**: Fixed hostname parsing and port precedence logic
 - **Build System**: Updated configure.sh and Makefile to handle new library structure
 - **Backward Compatibility**: All existing functionality preserved, new features are additive

DOCUMENTATION.md

@@ -296,7 +296,19 @@ id = client1
 - Configuration file provides defaults when command line options are not specified
 - Required parameters must be provided either via command line or configuration file
 
-#### Enhanced Features (v1.3.4)
+#### Enhanced Features (v1.4.6)
+
+**SSH Tunneling Improvements:**
+- Enhanced SSH tunnel handling with improved error recovery
+- Added specific handling for EBADF (Bad file descriptor) errors
+- Improved error handling in handle_tunnel_data for SSH client disconnections
+- Removed aggressive socket validation causing SSH client disconnections
+- Fixed SSH client socket invalidation issue in handle_tunnel_data
+- Added missing SSH client accept() logic in wsssh socket handling
+- Fixed SSH tunneling timing issue with proper data buffering
+- Implemented correct SSH tunneling architecture for wssshc
+- Fixed critical architectural issue in wssshc tunnel handling
+- Enhanced error handling for broken SSH connections
 
 **WebSocket Connection Management:**
 - Fixed ping frame parsing in C implementations (wsssh.c and wsscp.c)

README.md

@@ -602,10 +602,22 @@ Your support helps us continue developing and maintaining this open-source proje
 **Major Refactoring:**
 - **Code Architecture Overhaul**: Major refactoring to eliminate code duplication
   - Created shared libraries: `wssshlib.h/.c`, `websocket.h/.c`, `wssh_ssl.h/.c`, `tunnel.h/.c`
-  - Extracted ~1500+ lines of duplicate code between wsssh.c and wsscp.c
+  - Extracted ~1500+ lines of duplicate code between wsssh.c and wssshc.c
   - Improved maintainability and code organization with modular architecture
   - Enhanced build system with proper library dependencies
 
+**SSH Tunneling Enhancements:**
+- **Enhanced Tunnel Stability**: Improved SSH tunnel handling and error recovery
+  - Added specific handling for EBADF (Bad file descriptor) errors
+  - Improved error handling in handle_tunnel_data for SSH client disconnections
+  - Removed aggressive socket validation causing SSH client disconnections
+  - Fixed SSH client socket invalidation issue in handle_tunnel_data
+  - Added missing SSH client accept() logic in wsssh socket handling
+  - Fixed SSH tunneling timing issue with proper data buffering
+  - Implemented correct SSH tunneling architecture for wssshc
+  - Fixed critical architectural issue in wssshc tunnel handling
+  - Enhanced error handling for broken SSH connections
+
 **Critical Bug Fixes:**
 - **Port Option Behavior Correction**: Fixed critical port option behavior
   - `-p`/`-P` options now correctly specify wssshd server port (not SSH/SCP server port)
@@ -622,6 +634,7 @@ Your support helps us continue developing and maintaining this open-source proje
 **Technical Improvements:**
 - **Library Dependencies**: New build system properly links wsssh and wsscp against shared libraries
 - **Code Deduplication**: Eliminated redundant implementations of WebSocket, SSL, and tunnel functions
+- **SSH Tunnel Reliability**: Enhanced tunnel stability with improved error handling and connection management
 - **Port Handling**: Fixed hostname parsing and port precedence logic
 - **Build System**: Updated configure.sh and Makefile to handle new library structure
 - **Backward Compatibility**: All existing functionality preserved, new features are additive

TODO.md

@@ -3,9 +3,19 @@
 ## Recently Completed (v1.4.6)
 - [x] **Code Refactoring and Library Architecture**: Major refactoring to eliminate code duplication
   - Created shared libraries: `wssshlib.h/.c`, `websocket.h/.c`, `wssh_ssl.h/.c`, `tunnel.h/.c`
-  - Extracted ~1500+ lines of duplicate code between wsssh.c and wsscp.c
+  - Extracted ~1500+ lines of duplicate code between wsssh.c and wssshc.c
   - Improved maintainability and code organization with modular architecture
   - Enhanced build system with proper library dependencies
+- [x] **SSH Tunneling Improvements**: Enhanced SSH tunnel handling and error recovery
+  - Added specific handling for EBADF (Bad file descriptor) errors
+  - Improved error handling in handle_tunnel_data for SSH client disconnections
+  - Removed aggressive socket validation causing SSH client disconnections
+  - Fixed SSH client socket invalidation issue in handle_tunnel_data
+  - Added missing SSH client accept() logic in wsssh socket handling
+  - Fixed SSH tunneling timing issue with proper data buffering
+  - Implemented correct SSH tunneling architecture for wssshc
+  - Fixed critical architectural issue in wssshc tunnel handling
+  - Enhanced error handling for broken SSH connections
 - [x] **Port Option Behavior Correction**: Fixed critical port option behavior
   - `-p`/`-P` options now correctly specify wssshd server port (not SSH/SCP server port)
   - Removed misleading "passed through to ssh/scp" documentation