f99d5e8656
- Accept output traffic from all default routes through VPN interface - Accept output from all default routes to outbound subnets - Accept all input traffic on ports for all default routes - Add IP rules for all default routes
69 lines
1.8 KiB
Go
69 lines
1.8 KiB
Go
// Package firewall defines a configurator used to change the state
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// of the firewall as well as do some light routing changes.
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package firewall
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import (
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"context"
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"net"
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"sync"
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"github.com/qdm12/gluetun/internal/models"
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"github.com/qdm12/gluetun/internal/routing"
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"github.com/qdm12/golibs/command"
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)
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var _ Configurator = (*Config)(nil)
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// Configurator allows to change firewall rules and modify network routes.
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type Configurator interface {
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Enabler
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VPNConnectionSetter
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PortAllower
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OutboundSubnetsSetter
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}
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type Config struct { //nolint:maligned
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runner command.Runner
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logger Logger
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iptablesMutex sync.Mutex
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ip6tablesMutex sync.Mutex
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defaultRoutes []routing.DefaultRoute
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localNetworks []routing.LocalNetwork
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// Fixed state
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ipTables string
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ip6Tables string
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customRulesPath string
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// State
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enabled bool
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vpnConnection models.Connection
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vpnIntf string
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outboundSubnets []net.IPNet
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allowedInputPorts map[uint16]map[string]struct{} // port to interfaces set mapping
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stateMutex sync.Mutex
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}
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// NewConfig creates a new Config instance and returns an error
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// if no iptables implementation is available.
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func NewConfig(ctx context.Context, logger Logger,
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runner command.Runner, defaultRoutes []routing.DefaultRoute,
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localNetworks []routing.LocalNetwork) (config *Config, err error) {
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iptables, err := findIptablesSupported(ctx, runner)
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if err != nil {
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return nil, err
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}
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return &Config{
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runner: runner,
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logger: logger,
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allowedInputPorts: make(map[uint16]map[string]struct{}),
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ipTables: iptables,
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ip6Tables: findIP6tablesSupported(ctx, runner),
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customRulesPath: "/iptables/post-rules.txt",
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// Obtained from routing
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defaultRoutes: defaultRoutes,
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localNetworks: localNetworks,
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}, nil
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}
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