mirror of
https://github.com/qdm12/gluetun.git
synced 2026-05-06 20:10:11 +02:00
Quentin McGaw
4a78989d9d
- main reason being it's a burden to always define sentinel errors at global scope, wrap them with `%w` instead of using a string directly - only use sentinel errors when it has to be checked using `errors.Is` - replace all usage of these sentinel errors in `fmt.Errorf` with direct strings that were in the sentinel error - exclude the sentinel error definition requirement from .golangci.yml - update unit tests to use ContainersError instead of ErrorIs so it stays as a "not a change detector test" without requiring a sentinel error
106 lines
3.1 KiB
Go
106 lines
3.1 KiB
Go
package settings
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import (
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"fmt"
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"net/netip"
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"github.com/qdm12/gosettings"
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"github.com/qdm12/gosettings/reader"
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"github.com/qdm12/gotree"
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)
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// PMTUD contains settings to configure Path MTU Discovery.
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type PMTUD struct {
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// ICMPAddresses is the redundancy list of addresses to use
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// for ICMP path MTU discovery. Each address MUST handle ICMP
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// packets for PMTUD to work.
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// It cannot be nil in the internal state.
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ICMPAddresses []netip.Addr `json:"icmp_addresses"`
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// TCPAddresses is the redundancy list of addresses to use
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// for TCP path MTU discovery. Each address MUST have a listening
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// TCP server on the port specified.
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// It cannot be nil in the internal state.
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TCPAddresses []netip.AddrPort `json:"tcp_addresses"`
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}
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// Validate validates PMTUD settings.
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func (p PMTUD) validate() (err error) {
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for i, addr := range p.ICMPAddresses {
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if !addr.IsValid() {
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return fmt.Errorf("PMTUD ICMP address is not valid: at index %d", i)
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}
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}
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for i, addr := range p.TCPAddresses {
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if !addr.IsValid() {
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return fmt.Errorf("PMTUD TCP address is not valid: at index %d", i)
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}
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}
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return nil
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}
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func (p *PMTUD) copy() (copied PMTUD) {
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return PMTUD{
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ICMPAddresses: gosettings.CopySlice(p.ICMPAddresses),
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TCPAddresses: gosettings.CopySlice(p.TCPAddresses),
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}
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}
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func (p *PMTUD) overrideWith(other PMTUD) {
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p.ICMPAddresses = gosettings.OverrideWithSlice(p.ICMPAddresses, other.ICMPAddresses)
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p.TCPAddresses = gosettings.OverrideWithSlice(p.TCPAddresses, other.TCPAddresses)
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}
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func (p *PMTUD) setDefaults() {
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defaultICMPAddresses := []netip.Addr{
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netip.AddrFrom4([4]byte{1, 1, 1, 1}),
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netip.AddrFrom4([4]byte{8, 8, 8, 8}),
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}
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p.ICMPAddresses = gosettings.DefaultSlice(p.ICMPAddresses, defaultICMPAddresses)
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const dnsPort, tlsPort = 53, 443
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defaultTCPAddresses := []netip.AddrPort{
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netip.AddrPortFrom(netip.AddrFrom4([4]byte{1, 1, 1, 1}), dnsPort),
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netip.AddrPortFrom(netip.AddrFrom4([4]byte{8, 8, 8, 8}), dnsPort),
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netip.AddrPortFrom(netip.AddrFrom4([4]byte{1, 1, 1, 1}), tlsPort),
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netip.AddrPortFrom(netip.AddrFrom4([4]byte{8, 8, 8, 8}), tlsPort),
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netip.AddrPortFrom(netip.MustParseAddr("2606:4700:4700::1111"), dnsPort),
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netip.AddrPortFrom(netip.MustParseAddr("2001:4860:4860::8888"), dnsPort),
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netip.AddrPortFrom(netip.MustParseAddr("2606:4700:4700::1111"), tlsPort),
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netip.AddrPortFrom(netip.MustParseAddr("2001:4860:4860::8888"), tlsPort),
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}
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p.TCPAddresses = gosettings.DefaultSlice(p.TCPAddresses, defaultTCPAddresses)
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}
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func (p PMTUD) String() string {
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return p.toLinesNode().String()
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}
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func (p PMTUD) toLinesNode() (node *gotree.Node) {
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node = gotree.New("Path MTU discovery:")
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icmpAddrNode := node.Append("ICMP addresses:")
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for _, addr := range p.ICMPAddresses {
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icmpAddrNode.Append(addr.String())
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}
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tcpAddrNode := node.Append("TCP addresses:")
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for _, addr := range p.TCPAddresses {
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tcpAddrNode.Append(addr.String())
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}
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return node
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}
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func (p *PMTUD) read(r *reader.Reader) (err error) {
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p.ICMPAddresses, err = r.CSVNetipAddresses("PMTUD_ICMP_ADDRESSES")
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if err != nil {
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return err
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}
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p.TCPAddresses, err = r.CSVNetipAddrPorts("PMTUD_TCP_ADDRESSES")
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if err != nil {
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return err
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}
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return nil
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}
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