3c8e80a1a4
- Remove no longer needed exclude rules - Add new exclude rules for printf govet errors - Remove deprecated linters `execinquery` and `exportloopref` - Rename linter `goerr113` to `err113` - Rename linter `gomnd` to `mnd`
44 lines
1.1 KiB
Go
44 lines
1.1 KiB
Go
package perfectprivacy
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import (
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"context"
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"net/netip"
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"github.com/qdm12/gluetun/internal/provider/utils"
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)
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// PortForward calculates and returns the VPN server side ports forwarded.
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func (p *Provider) PortForward(_ context.Context,
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objects utils.PortForwardObjects) (ports []uint16, err error) {
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if !objects.InternalIP.IsValid() {
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panic("internal ip is not set")
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}
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return internalIPToPorts(objects.InternalIP), nil
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}
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func (p *Provider) KeepPortForward(ctx context.Context,
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_ utils.PortForwardObjects) (err error) {
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<-ctx.Done()
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return ctx.Err()
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}
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// See https://www.perfect-privacy.com/en/faq section
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// How are the default forwarding ports being calculated?
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func internalIPToPorts(internalIP netip.Addr) (ports []uint16) {
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internalIPBytes := internalIP.AsSlice()
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// Convert the internal IP address to a bit string
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// and keep only the last 12 bits
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last16Bits := internalIPBytes[len(internalIPBytes)-2:]
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last12Bits := []byte{
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last16Bits[0] & 0b00001111, // only keep 4 bits
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last16Bits[1],
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}
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basePort := uint16(last12Bits[0])<<8 + uint16(last12Bits[1]) //nolint:mnd
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return []uint16{
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10000 + basePort,
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20000 + basePort,
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30000 + basePort,
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}
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}
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