Critical bug fix: fetch_current_scope_for_user and mount_current_scope
were calling Accounts.get_user(nil) when impersonating session flag was
true but superuser_id or target_user_id were nil.
This caused FunctionClauseError crashes for all logged-out users if they
had stale impersonation session data.
Changes:
- Check if both superuser_id and target_user_id exist before calling get_user
- Clear invalid impersonation state if IDs are missing
- Apply fix to both fetch_current_scope_for_user (controllers) and
mount_current_scope (LiveViews)
This ensures graceful handling of corrupted/partial session state.
Changed signed_in_path to redirect users to their default organization's
equipment page instead of the organization list.
Behavior:
- If user has organizations, redirect to first org's equipment page
- First org is determined by most recently joined (membership.inserted_at)
- If user has no organizations, redirect to /orgs to create one
This provides a better UX by landing users directly at their equipment
list instead of requiring an extra click through the org selector.
Security improvements to prevent potential issues:
1. Port Validation (normalize_port):
- Validate port range is 1-65535
- Use Integer.parse instead of String.to_integer to prevent crashes
- Return default port 161 for any invalid input
2. SNMP Test Validation (validate_test_snmp_input):
- Validate IP address format before allowing SNMP tests
- Require non-empty community string
- Prevent network scanning with invalid/missing IPs
- Return clear error messages for validation failures
These changes ensure user input is properly validated and prevent:
- Integer overflow/underflow with ports
- Process crashes from invalid input
- Unauthorized network scanning via SNMP test feature
- SNMP requests with missing credentials
Two issues were preventing impersonation from working correctly:
1. Templates were not passing current_scope to Layouts.authenticated,
so the impersonation banner never displayed.
2. fetch_current_scope_for_user was looking up the user from the
session token, which always pointed to the superuser. This caused
the superuser to see their own organizations and equipment instead
of the impersonated user's data.
Changes:
- Pass current_scope={@current_scope} to all Layouts.authenticated calls
- Store target_user_id in session during impersonation
- Fetch target user directly from database using target_user_id
- Update both fetch_current_scope_for_user (for controllers) and
mount_current_scope (for LiveViews) to properly handle impersonation
- Clean up target_user_id from session when impersonation ends
Now when a superuser impersonates a user, they correctly see:
- The impersonation banner at the top with exit link
- The target user's organizations and equipment
- All data scoped to the impersonated user
Implement comprehensive admin interface allowing designated superusers to view all users and organizations, impersonate users for debugging, and perform administrative operations. All superuser actions are tracked in audit logs for compliance.
Features:
- Superuser authentication with dedicated admin routes at /admin
- User impersonation with session state preservation
- Admin dashboard with system statistics
- User and organization management interfaces
- Comprehensive audit logging with IP tracking
- Visual impersonation banner with exit capability
- Security controls preventing self-impersonation and superuser-to-superuser impersonation
Database:
- Add is_superuser boolean field to users table
- Create audit_logs table for tracking sensitive operations
- Set graham@mcintire.me as initial superuser
- Explicitly discard return value from Endpoint.broadcast call
- Broadcast is fire-and-forget, return value not needed
- Resolves unmatched_return warning at line 54
