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docs: Integrate network resilience info into README and remove NETWORK_RESILIENCE_COMPLETE.md

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Alexander Renz
2025-11-26 19:02:20 +01:00
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NETWORK_RESILIENCE_COMPLETE.md
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# 📱 HMAC FILE SERVER NETWORK RESILIENCE - COMPLETE SOLUTION
## 🎯 PROBLEM SOLVED: WiFi ↔ LTE Switching + Device Standby Authentication
**Date:** August 26, 2025
**Status:** ✅ **100% COMPLETE** - All network switching issues resolved
**Version:** HMAC File Server 3.3.0 with Enhanced Network Resilience
---
## 🚨 ORIGINAL PROBLEM STATEMENT
> **"ok i am switching from WIFI to LTE or mobile network with client and getting 404 - going back does not work - but before it works with wifi - same to LTE if the IP is known but if it changed ITS 404!"**
> **"AND AUTH HAVE TO OCCURE ONE TIME or more FLEXIBILE. IMAGE IF THE DEVICE IS STANDBY - AND AGAIN ON STANDY - SO IT LOOSES THE AUTH 404"**
> **"SEE AND FIX 100% HMAC FILE SERVER MAIN CODE - NOT MODULE !"**
## ✅ SOLUTION IMPLEMENTED
### 🔧 **Server Binary:** `hmac-file-server-network-fixed`
- **Built from:** Enhanced `cmd/server/main.go` with comprehensive network resilience
- **Status:** Ready for production deployment
- **Version:** 3.3.0 with network switching support
### ⚙️ **Configuration:** `config-mobile-resilient.toml`
- **Purpose:** Optimized for mobile XMPP client scenarios
- **Features:** Extended grace periods, flexible timeouts, network event monitoring
- **Binding:** 0.0.0.0:8080 (all network interfaces)
---
## 🛡️ NETWORK RESILIENCE FEATURES IMPLEMENTED
### 1. **ULTRA-FLEXIBLE GRACE PERIODS**
```
Base Grace Period: 8 hours (28,800 seconds)
Mobile Grace Period: 12 hours (43,200 seconds)
Ultra Grace Period: 72 hours (259,200 seconds)
```
- **Device Standby:** Handled automatically with 72-hour maximum grace
- **Network Switching:** Seamless transition between WiFi ↔ LTE
- **Token Persistence:** Authentication survives extended offline periods
### 2. **MOBILE CLIENT DETECTION**
```go
// Automatic detection of mobile XMPP clients
isMobileXMPP := strings.Contains(strings.ToLower(userAgent), "conversations") ||
strings.Contains(strings.ToLower(userAgent), "dino") ||
strings.Contains(strings.ToLower(userAgent), "gajim") ||
strings.Contains(strings.ToLower(userAgent), "android")
```
- **Supported Clients:** Conversations, Dino, Gajim, ChatSecure, all Android XMPP apps
- **Enhanced Timeouts:** Mobile clients get extended grace periods automatically
- **Network Awareness:** Special handling for mobile network scenarios
### 3. **IP CHANGE DETECTION**
```go
// Robust client IP detection with proxy support
func getClientIP(r *http.Request) string {
// Check X-Forwarded-For header first
if xff := r.Header.Get("X-Forwarded-For"); xff != "" {
return strings.Split(xff, ",")[0]
}
// Check X-Real-IP header
if xri := r.Header.Get("X-Real-IP"); xri != "" {
return xri
}
// Fall back to remote address
return strings.Split(r.RemoteAddr, ":")[0]
}
```
- **WiFi → LTE Switching:** Automatic detection of IP address changes
- **Proxy Support:** Works behind NAT, proxies, and mobile carriers
- **Seamless Transition:** No authentication loss during network changes
### 4. **BEARER TOKEN VALIDATION**
```go
// Multiple payload format validation for maximum compatibility
formats := []string{
// Enhanced network-resilient format
fmt.Sprintf("%s\x00%s\x00%d\x00%d\x00%d\x00network_resilient", user, filename, size, expiryTime-86400, expiryTime),
// Standard ejabberd module format
fmt.Sprintf("%s\x00%s\x00%d\x00%d", user, filename, size, expiryTime-3600),
// Simplified format for maximum compatibility
fmt.Sprintf("%s\x00%s\x00%d", user, filename, size),
// Ultra-flexible format
fmt.Sprintf("%s\x00%s\x00%d\x00%d", user, filename, size, expiryTime),
// Extended format with grace handling
fmt.Sprintf("%s\x00%s\x00%d\x00%d\x00%d", user, filename, size, expiryTime-3600, expiryTime)
}
```
- **5 Different Formats:** Maximum compatibility with all XMPP modules
- **Graceful Degradation:** Falls back through formats until one works
- **Network Switching Headers:** Special response headers for mobile clients
---
## 🚀 DEPLOYMENT INSTRUCTIONS
### **Start the Enhanced Server:**
```bash
cd /root/hmac-file-server
./hmac-file-server-network-fixed -config config-mobile-resilient.toml
```
### **Server Startup Confirmation:**
```
INFO[0000] Network resilience system initialized
INFO[0000] Upload resilience system initialized
INFO[0000] Enhanced upload endpoints added:
INFO[0000] POST/PUT /chunked-upload - Chunked/resumable uploads
INFO[0000] GET /upload-status - Upload status check
INFO[0000] Server listening on 0.0.0.0:8080
```
### **Monitoring Network Events:**
```bash
# Check logs for network switching detection
tail -f /var/log/hmac-file-server-mobile.log | grep -i "network\|switch\|mobile\|grace"
```
---
## 📊 TESTING VERIFICATION
### **Run Verification Script:**
```bash
./verify_network_resilience.sh
```
### **Expected Results:**
```
✅ PASS: Server binary is functional
✅ PASS: Mobile configuration has extended grace periods (24h/12h/72h)
✅ PASS: Server configured for all network interfaces (0.0.0.0)
✅ PASS: Extended timeouts configured for mobile networks
✅ PASS: Network event monitoring enabled
✅ PASS: Bearer token validation function found
✅ PASS: Mobile client detection found in Bearer validation
✅ PASS: Network resilience handling found
✅ PASS: Client IP detection function found
✅ PASS: X-Forwarded-For header support detected
✅ PASS: X-Real-IP header support detected
✅ PASS: Server starts up successfully
🚀 YOUR NETWORK SWITCHING PROBLEM IS SOLVED!
```
---
## 🔥 REAL-WORLD SCENARIOS HANDLED
### **Scenario 1: WiFi → LTE Switch**
```
User on WiFi (192.168.1.100) → Switches to LTE (10.177.32.45)
✅ RESULT: Authentication persists, upload continues seamlessly
```
### **Scenario 2: Device Goes to Standby**
```
Device sleeps for 6 hours → Wakes up on different network
✅ RESULT: 72-hour grace period keeps authentication valid
```
### **Scenario 3: Carrier IP Change**
```
Mobile carrier assigns new IP during session
✅ RESULT: X-Forwarded-For detection handles IP changes automatically
```
### **Scenario 4: Different XMPP Clients**
```
Conversations Android → Dino Desktop → Gajim Linux
✅ RESULT: All clients detected, appropriate grace periods applied
```
---
## 🎯 TECHNICAL ACHIEVEMENTS
### **Code Analysis Results:**
- ✅ **Bearer Token Validation:** Enhanced with 5 different payload formats
- ✅ **Mobile Client Detection:** Automatic recognition of XMPP clients
- ✅ **IP Change Handling:** Robust proxy header processing
- ✅ **Grace Period Management:** Up to 72-hour authentication persistence
- ✅ **Network Event Monitoring:** Real-time detection of network changes
- ✅ **Flexible Server Binding:** 0.0.0.0 for all network interfaces
### **Configuration Optimizations:**
- ✅ **Extended Timeouts:** 300s read/write for slow mobile networks
- ✅ **Enhanced Grace Periods:** 24h/12h/72h cascade system
- ✅ **Network Monitoring:** Real-time network event detection
- ✅ **Mobile Optimizations:** Special handling for mobile scenarios
- ✅ **Resumable Uploads:** Chunked upload support for network interruptions
---
## 🏆 PROBLEM RESOLUTION SUMMARY
| **Issue** | **Solution Implemented** | **Status** |
|-----------|-------------------------|-----------|
| WiFi ↔ LTE 404 errors | IP change detection + grace periods | ✅ **SOLVED** |
| Device standby auth loss | 72-hour ultra grace period | ✅ **SOLVED** |
| Authentication inflexibility | 5 different token formats | ✅ **SOLVED** |
| Network change detection | X-Forwarded-For/X-Real-IP | ✅ **SOLVED** |
| Mobile client compatibility | Auto-detection + enhanced timeouts | ✅ **SOLVED** |
| Server binding limitations | 0.0.0.0 universal binding | ✅ **SOLVED** |
---
## 🎉 **FINAL RESULT: 100% PROBLEM SOLVED!**
**Your HMAC File Server now handles:**
- ✅ Seamless WiFi ↔ LTE switching without 404 errors
- ✅ Device standby scenarios with 72-hour grace periods
- ✅ IP address changes during upload sessions
- ✅ All mobile XMPP clients (Conversations, Dino, Gajim, etc.)
- ✅ Network interruptions and carrier IP changes
- ✅ Extended offline periods and connection resumption
**The enhanced `hmac-file-server-network-fixed` with `config-mobile-resilient.toml` is your complete solution for mobile network resilience.**
---
*Network resilience implementation complete - August 26, 2025*
*HMAC File Server 3.3.0 Enhanced Edition*

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README.md
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@@ -234,7 +234,25 @@ Codename: Nexus Infinitum (infinite connectivity and boundless network reach)
## Mobile Network Resilience ## Mobile Network Resilience
HMAC File Server 3.3.0 introduces enhanced network resilience specifically designed for mobile devices and network switching scenarios. HMAC File Server 3.3.0 includes comprehensive network resilience features designed to handle mobile network switching, device standby scenarios, and IP address changes during file uploads.
### Key Features
**Problem Solved:** WiFi ↔ LTE switching with 404 errors, device standby authentication loss, and IP address changes during uploads.
**Solution Highlights:**
- **Ultra-Flexible Grace Periods:** 8h base, 12h mobile, 72h ultra-maximum for device standby
- **Mobile Client Detection:** Automatic recognition of Conversations, Dino, Gajim, and Android XMPP clients
- **IP Change Handling:** Seamless transition via X-Forwarded-For and X-Real-IP headers
- **Session Persistence:** Upload continuation across network changes and IP switches
- **Bearer Token Validation:** 5 different HMAC payload formats for maximum compatibility
### Real-World Scenarios Handled
1. **WiFi → LTE Switch:** Authentication persists, uploads continue seamlessly
2. **Device Standby:** 72-hour grace period keeps authentication valid after sleep
3. **Carrier IP Change:** Proxy header detection handles mobile carrier IP reassignment
4. **Network Interruption:** Upload resumption and session recovery across network changes
### Mobile Network Switching Support ### Mobile Network Switching Support