[Unit]
Description=Route-Switcher - Automatic network failover service
Documentation=https://git.hudrydum.cz/michal.humpula/route-switcher
After=network.target network-online.target
Wants=network-online.target
ConditionPathExists=/usr/local/sbin/route-switcher

[Service]
Type=simple
ExecStart=/usr/local/sbin/route-switcher
Restart=always
RestartSec=5
StandardOutput=journal
StandardError=journal

# Environment variables (customize these for your network)
Environment=RUST_LOG=info
Environment=PRIMARY_INTERFACE=eth0
Environment=SECONDARY_INTERFACE=eth1
Environment=PRIMARY_GATEWAY=192.168.1.1
Environment=SECONDARY_GATEWAY=192.168.2.1
Environment=PING_TARGET=8.8.8.8

User=root
Group=root
CapabilityBoundingSet=CAP_NET_ADMIN CAP_NET_RAW
AmbientCapabilities=CAP_NET_ADMIN CAP_NET_RAW
NoNewPrivileges=true

# Resource limits
LimitNOFILE=65536
LimitNPROC=4096

# Process isolation
ProtectSystem=strict
ProtectHome=true
ReadWritePaths=/var/log
PrivateTmp=true
ProtectKernelTunables=true
ProtectControlGroups=true
RestrictRealtime=true

[Install]
WantedBy=multi-user.target