chore(settings): use generics for helping functions (#1427)

go.mod

@@ -18,6 +18,7 @@ require (
 	github.com/stretchr/testify v1.8.2
 	github.com/vishvananda/netlink v1.2.1-beta.2
 	github.com/youmark/pkcs8 v0.0.0-20201027041543-1326539a0a0a
+	golang.org/x/exp v0.0.0-20230519143937-03e91628a987
 	golang.org/x/net v0.10.0
 	golang.org/x/sys v0.8.0
 	golang.org/x/text v0.9.0

go.sum

@@ -150,6 +150,8 @@ golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a/go.mod h1:P+XmwS30IXTQdn5
 golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.6.0 h1:qfktjS5LUO+fFKeJXZ+ikTRijMmljikvG68fpMMruSc=
 golang.org/x/crypto v0.6.0/go.mod h1:OFC/31mSvZgRz0V1QTNCzfAI1aIRzbiufJtkMIlEp58=
+golang.org/x/exp v0.0.0-20230519143937-03e91628a987 h1:3xJIFvzUFbu4ls0BTBYcgbCGhA63eAOEMxIHugyXJqA=
+golang.org/x/exp v0.0.0-20230519143937-03e91628a987/go.mod h1:V1LtkGg67GoY2N1AnLN78QLrzxkLyJw7RJb1gzOOz9w=
 golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=

internal/configuration/settings/dns.go

@@ -40,7 +40,7 @@ func (d DNS) validate() (err error) {
 func (d *DNS) Copy() (copied DNS) {
 	return DNS{
 		ServerAddress:  d.ServerAddress,
-		KeepNameserver: helpers.CopyBoolPtr(d.KeepNameserver),
+		KeepNameserver: helpers.CopyPointer(d.KeepNameserver),
 		DoT:            d.DoT.copy(),
 	}
 }
@@ -49,7 +49,7 @@ func (d *DNS) Copy() (copied DNS) {
 // unset field of the receiver settings object.
 func (d *DNS) mergeWith(other DNS) {
 	d.ServerAddress = helpers.MergeWithIP(d.ServerAddress, other.ServerAddress)
-	d.KeepNameserver = helpers.MergeWithBool(d.KeepNameserver, other.KeepNameserver)
+	d.KeepNameserver = helpers.MergeWithPointer(d.KeepNameserver, other.KeepNameserver)
 	d.DoT.mergeWith(other.DoT)
 }
 
@@ -58,14 +58,14 @@ func (d *DNS) mergeWith(other DNS) {
 // settings.
 func (d *DNS) overrideWith(other DNS) {
 	d.ServerAddress = helpers.OverrideWithIP(d.ServerAddress, other.ServerAddress)
-	d.KeepNameserver = helpers.OverrideWithBool(d.KeepNameserver, other.KeepNameserver)
+	d.KeepNameserver = helpers.OverrideWithPointer(d.KeepNameserver, other.KeepNameserver)
 	d.DoT.overrideWith(other.DoT)
 }
 
 func (d *DNS) setDefaults() {
 	localhost := netip.AddrFrom4([4]byte{127, 0, 0, 1})
 	d.ServerAddress = helpers.DefaultIP(d.ServerAddress, localhost)
-	d.KeepNameserver = helpers.DefaultBool(d.KeepNameserver, false)
+	d.KeepNameserver = helpers.DefaultPointer(d.KeepNameserver, false)
 	d.DoT.setDefaults()
 }
 

internal/configuration/settings/dnsblacklist.go

@@ -23,9 +23,9 @@ type DNSBlacklist struct {
 }
 
 func (b *DNSBlacklist) setDefaults() {
-	b.BlockMalicious = helpers.DefaultBool(b.BlockMalicious, true)
+	b.BlockMalicious = helpers.DefaultPointer(b.BlockMalicious, true)
-	b.BlockAds = helpers.DefaultBool(b.BlockAds, false)
+	b.BlockAds = helpers.DefaultPointer(b.BlockAds, false)
-	b.BlockSurveillance = helpers.DefaultBool(b.BlockSurveillance, true)
+	b.BlockSurveillance = helpers.DefaultPointer(b.BlockSurveillance, true)
 }
 
 var hostRegex = regexp.MustCompile(`^([a-zA-Z0-9]|[a-zA-Z0-9_][a-zA-Z0-9\-_]{0,61}[a-zA-Z0-9_])(\.([a-zA-Z0-9]|[a-zA-Z0-9_][a-zA-Z0-9\-_]{0,61}[a-zA-Z0-9]))*$`) //nolint:lll
@@ -53,34 +53,34 @@ func (b DNSBlacklist) validate() (err error) {
 
 func (b DNSBlacklist) copy() (copied DNSBlacklist) {
 	return DNSBlacklist{
-		BlockMalicious:       helpers.CopyBoolPtr(b.BlockMalicious),
+		BlockMalicious:       helpers.CopyPointer(b.BlockMalicious),
-		BlockAds:             helpers.CopyBoolPtr(b.BlockAds),
+		BlockAds:             helpers.CopyPointer(b.BlockAds),
-		BlockSurveillance:    helpers.CopyBoolPtr(b.BlockSurveillance),
+		BlockSurveillance:    helpers.CopyPointer(b.BlockSurveillance),
-		AllowedHosts:         helpers.CopyStringSlice(b.AllowedHosts),
+		AllowedHosts:         helpers.CopySlice(b.AllowedHosts),
-		AddBlockedHosts:      helpers.CopyStringSlice(b.AddBlockedHosts),
+		AddBlockedHosts:      helpers.CopySlice(b.AddBlockedHosts),
-		AddBlockedIPs:        helpers.CopyNetipAddressesSlice(b.AddBlockedIPs),
+		AddBlockedIPs:        helpers.CopySlice(b.AddBlockedIPs),
-		AddBlockedIPPrefixes: helpers.CopyNetipPrefixesSlice(b.AddBlockedIPPrefixes),
+		AddBlockedIPPrefixes: helpers.CopySlice(b.AddBlockedIPPrefixes),
 	}
 }
 
 func (b *DNSBlacklist) mergeWith(other DNSBlacklist) {
-	b.BlockMalicious = helpers.MergeWithBool(b.BlockMalicious, other.BlockMalicious)
+	b.BlockMalicious = helpers.MergeWithPointer(b.BlockMalicious, other.BlockMalicious)
-	b.BlockAds = helpers.MergeWithBool(b.BlockAds, other.BlockAds)
+	b.BlockAds = helpers.MergeWithPointer(b.BlockAds, other.BlockAds)
-	b.BlockSurveillance = helpers.MergeWithBool(b.BlockSurveillance, other.BlockSurveillance)
+	b.BlockSurveillance = helpers.MergeWithPointer(b.BlockSurveillance, other.BlockSurveillance)
-	b.AllowedHosts = helpers.MergeStringSlices(b.AllowedHosts, other.AllowedHosts)
+	b.AllowedHosts = helpers.MergeSlices(b.AllowedHosts, other.AllowedHosts)
-	b.AddBlockedHosts = helpers.MergeStringSlices(b.AddBlockedHosts, other.AddBlockedHosts)
+	b.AddBlockedHosts = helpers.MergeSlices(b.AddBlockedHosts, other.AddBlockedHosts)
-	b.AddBlockedIPs = helpers.MergeNetipAddressesSlices(b.AddBlockedIPs, other.AddBlockedIPs)
+	b.AddBlockedIPs = helpers.MergeSlices(b.AddBlockedIPs, other.AddBlockedIPs)
-	b.AddBlockedIPPrefixes = helpers.MergeNetipPrefixesSlices(b.AddBlockedIPPrefixes, other.AddBlockedIPPrefixes)
+	b.AddBlockedIPPrefixes = helpers.MergeSlices(b.AddBlockedIPPrefixes, other.AddBlockedIPPrefixes)
 }
 
 func (b *DNSBlacklist) overrideWith(other DNSBlacklist) {
-	b.BlockMalicious = helpers.OverrideWithBool(b.BlockMalicious, other.BlockMalicious)
+	b.BlockMalicious = helpers.OverrideWithPointer(b.BlockMalicious, other.BlockMalicious)
-	b.BlockAds = helpers.OverrideWithBool(b.BlockAds, other.BlockAds)
+	b.BlockAds = helpers.OverrideWithPointer(b.BlockAds, other.BlockAds)
-	b.BlockSurveillance = helpers.OverrideWithBool(b.BlockSurveillance, other.BlockSurveillance)
+	b.BlockSurveillance = helpers.OverrideWithPointer(b.BlockSurveillance, other.BlockSurveillance)
-	b.AllowedHosts = helpers.OverrideWithStringSlice(b.AllowedHosts, other.AllowedHosts)
+	b.AllowedHosts = helpers.OverrideWithSlice(b.AllowedHosts, other.AllowedHosts)
-	b.AddBlockedHosts = helpers.OverrideWithStringSlice(b.AddBlockedHosts, other.AddBlockedHosts)
+	b.AddBlockedHosts = helpers.OverrideWithSlice(b.AddBlockedHosts, other.AddBlockedHosts)
-	b.AddBlockedIPs = helpers.OverrideWithNetipAddressesSlice(b.AddBlockedIPs, other.AddBlockedIPs)
+	b.AddBlockedIPs = helpers.OverrideWithSlice(b.AddBlockedIPs, other.AddBlockedIPs)
-	b.AddBlockedIPPrefixes = helpers.OverrideWithNetipPrefixesSlice(b.AddBlockedIPPrefixes, other.AddBlockedIPPrefixes)
+	b.AddBlockedIPPrefixes = helpers.OverrideWithSlice(b.AddBlockedIPPrefixes, other.AddBlockedIPPrefixes)
 }
 
 func (b DNSBlacklist) ToBlacklistFormat() (settings blacklist.BuilderSettings, err error) {

internal/configuration/settings/dot.go

@@ -54,8 +54,8 @@ func (d DoT) validate() (err error) {
 
 func (d *DoT) copy() (copied DoT) {
 	return DoT{
-		Enabled:      helpers.CopyBoolPtr(d.Enabled),
+		Enabled:      helpers.CopyPointer(d.Enabled),
-		UpdatePeriod: helpers.CopyDurationPtr(d.UpdatePeriod),
+		UpdatePeriod: helpers.CopyPointer(d.UpdatePeriod),
 		Unbound:      d.Unbound.copy(),
 		Blacklist:    d.Blacklist.copy(),
 	}
@@ -64,8 +64,8 @@ func (d *DoT) copy() (copied DoT) {
 // mergeWith merges the other settings into any
 // unset field of the receiver settings object.
 func (d *DoT) mergeWith(other DoT) {
-	d.Enabled = helpers.MergeWithBool(d.Enabled, other.Enabled)
+	d.Enabled = helpers.MergeWithPointer(d.Enabled, other.Enabled)
-	d.UpdatePeriod = helpers.MergeWithDurationPtr(d.UpdatePeriod, other.UpdatePeriod)
+	d.UpdatePeriod = helpers.MergeWithPointer(d.UpdatePeriod, other.UpdatePeriod)
 	d.Unbound.mergeWith(other.Unbound)
 	d.Blacklist.mergeWith(other.Blacklist)
 }
@@ -74,16 +74,16 @@ func (d *DoT) mergeWith(other DoT) {
 // settings object with any field set in the other
 // settings.
 func (d *DoT) overrideWith(other DoT) {
-	d.Enabled = helpers.OverrideWithBool(d.Enabled, other.Enabled)
+	d.Enabled = helpers.OverrideWithPointer(d.Enabled, other.Enabled)
-	d.UpdatePeriod = helpers.OverrideWithDurationPtr(d.UpdatePeriod, other.UpdatePeriod)
+	d.UpdatePeriod = helpers.OverrideWithPointer(d.UpdatePeriod, other.UpdatePeriod)
 	d.Unbound.overrideWith(other.Unbound)
 	d.Blacklist.overrideWith(other.Blacklist)
 }
 
 func (d *DoT) setDefaults() {
-	d.Enabled = helpers.DefaultBool(d.Enabled, true)
+	d.Enabled = helpers.DefaultPointer(d.Enabled, true)
 	const defaultUpdatePeriod = 24 * time.Hour
-	d.UpdatePeriod = helpers.DefaultDurationPtr(d.UpdatePeriod, defaultUpdatePeriod)
+	d.UpdatePeriod = helpers.DefaultPointer(d.UpdatePeriod, defaultUpdatePeriod)
 	d.Unbound.setDefaults()
 	d.Blacklist.setDefaults()
 }

internal/configuration/settings/firewall.go

@@ -40,11 +40,11 @@ func hasZeroPort(ports []uint16) (has bool) {
 
 func (f *Firewall) copy() (copied Firewall) {
 	return Firewall{
-		VPNInputPorts:   helpers.CopyUint16Slice(f.VPNInputPorts),
+		VPNInputPorts:   helpers.CopySlice(f.VPNInputPorts),
-		InputPorts:      helpers.CopyUint16Slice(f.InputPorts),
+		InputPorts:      helpers.CopySlice(f.InputPorts),
-		OutboundSubnets: helpers.CopyNetipPrefixesSlice(f.OutboundSubnets),
+		OutboundSubnets: helpers.CopySlice(f.OutboundSubnets),
-		Enabled:         helpers.CopyBoolPtr(f.Enabled),
+		Enabled:         helpers.CopyPointer(f.Enabled),
-		Debug:           helpers.CopyBoolPtr(f.Debug),
+		Debug:           helpers.CopyPointer(f.Debug),
 	}
 }
 
@@ -53,27 +53,27 @@ func (f *Firewall) copy() (copied Firewall) {
 // It merges values of slices together, even if they
 // are set in the receiver settings.
 func (f *Firewall) mergeWith(other Firewall) {
-	f.VPNInputPorts = helpers.MergeUint16Slices(f.VPNInputPorts, other.VPNInputPorts)
+	f.VPNInputPorts = helpers.MergeSlices(f.VPNInputPorts, other.VPNInputPorts)
-	f.InputPorts = helpers.MergeUint16Slices(f.InputPorts, other.InputPorts)
+	f.InputPorts = helpers.MergeSlices(f.InputPorts, other.InputPorts)
-	f.OutboundSubnets = helpers.MergeNetipPrefixesSlices(f.OutboundSubnets, other.OutboundSubnets)
+	f.OutboundSubnets = helpers.MergeSlices(f.OutboundSubnets, other.OutboundSubnets)
-	f.Enabled = helpers.MergeWithBool(f.Enabled, other.Enabled)
+	f.Enabled = helpers.MergeWithPointer(f.Enabled, other.Enabled)
-	f.Debug = helpers.MergeWithBool(f.Debug, other.Debug)
+	f.Debug = helpers.MergeWithPointer(f.Debug, other.Debug)
 }
 
 // overrideWith overrides fields of the receiver
 // settings object with any field set in the other
 // settings.
 func (f *Firewall) overrideWith(other Firewall) {
-	f.VPNInputPorts = helpers.OverrideWithUint16Slice(f.VPNInputPorts, other.VPNInputPorts)
+	f.VPNInputPorts = helpers.OverrideWithSlice(f.VPNInputPorts, other.VPNInputPorts)
-	f.InputPorts = helpers.OverrideWithUint16Slice(f.InputPorts, other.InputPorts)
+	f.InputPorts = helpers.OverrideWithSlice(f.InputPorts, other.InputPorts)
-	f.OutboundSubnets = helpers.OverrideWithNetipPrefixesSlice(f.OutboundSubnets, other.OutboundSubnets)
+	f.OutboundSubnets = helpers.OverrideWithSlice(f.OutboundSubnets, other.OutboundSubnets)
-	f.Enabled = helpers.OverrideWithBool(f.Enabled, other.Enabled)
+	f.Enabled = helpers.OverrideWithPointer(f.Enabled, other.Enabled)
-	f.Debug = helpers.OverrideWithBool(f.Debug, other.Debug)
+	f.Debug = helpers.OverrideWithPointer(f.Debug, other.Debug)
 }
 
 func (f *Firewall) setDefaults() {
-	f.Enabled = helpers.DefaultBool(f.Enabled, true)
+	f.Enabled = helpers.DefaultPointer(f.Enabled, true)
-	f.Debug = helpers.DefaultBool(f.Debug, false)
+	f.Debug = helpers.DefaultPointer(f.Debug, false)
 }
 
 func (f Firewall) String() string {

internal/configuration/settings/health.go

@@ -66,10 +66,10 @@ func (h *Health) copy() (copied Health) {
 // unset field of the receiver settings object.
 func (h *Health) MergeWith(other Health) {
 	h.ServerAddress = helpers.MergeWithString(h.ServerAddress, other.ServerAddress)
-	h.ReadHeaderTimeout = helpers.MergeWithDuration(h.ReadHeaderTimeout, other.ReadHeaderTimeout)
+	h.ReadHeaderTimeout = helpers.MergeWithNumber(h.ReadHeaderTimeout, other.ReadHeaderTimeout)
-	h.ReadTimeout = helpers.MergeWithDuration(h.ReadTimeout, other.ReadTimeout)
+	h.ReadTimeout = helpers.MergeWithNumber(h.ReadTimeout, other.ReadTimeout)
 	h.TargetAddress = helpers.MergeWithString(h.TargetAddress, other.TargetAddress)
-	h.SuccessWait = helpers.MergeWithDuration(h.SuccessWait, other.SuccessWait)
+	h.SuccessWait = helpers.MergeWithNumber(h.SuccessWait, other.SuccessWait)
 	h.VPN.mergeWith(other.VPN)
 }
 
@@ -78,22 +78,22 @@ func (h *Health) MergeWith(other Health) {
 // settings.
 func (h *Health) OverrideWith(other Health) {
 	h.ServerAddress = helpers.OverrideWithString(h.ServerAddress, other.ServerAddress)
-	h.ReadHeaderTimeout = helpers.OverrideWithDuration(h.ReadHeaderTimeout, other.ReadHeaderTimeout)
+	h.ReadHeaderTimeout = helpers.OverrideWithNumber(h.ReadHeaderTimeout, other.ReadHeaderTimeout)
-	h.ReadTimeout = helpers.OverrideWithDuration(h.ReadTimeout, other.ReadTimeout)
+	h.ReadTimeout = helpers.OverrideWithNumber(h.ReadTimeout, other.ReadTimeout)
 	h.TargetAddress = helpers.OverrideWithString(h.TargetAddress, other.TargetAddress)
-	h.SuccessWait = helpers.OverrideWithDuration(h.SuccessWait, other.SuccessWait)
+	h.SuccessWait = helpers.OverrideWithNumber(h.SuccessWait, other.SuccessWait)
 	h.VPN.overrideWith(other.VPN)
 }
 
 func (h *Health) SetDefaults() {
 	h.ServerAddress = helpers.DefaultString(h.ServerAddress, "127.0.0.1:9999")
 	const defaultReadHeaderTimeout = 100 * time.Millisecond
-	h.ReadHeaderTimeout = helpers.DefaultDuration(h.ReadHeaderTimeout, defaultReadHeaderTimeout)
+	h.ReadHeaderTimeout = helpers.DefaultNumber(h.ReadHeaderTimeout, defaultReadHeaderTimeout)
 	const defaultReadTimeout = 500 * time.Millisecond
-	h.ReadTimeout = helpers.DefaultDuration(h.ReadTimeout, defaultReadTimeout)
+	h.ReadTimeout = helpers.DefaultNumber(h.ReadTimeout, defaultReadTimeout)
 	h.TargetAddress = helpers.DefaultString(h.TargetAddress, "cloudflare.com:443")
 	const defaultSuccessWait = 5 * time.Second
-	h.SuccessWait = helpers.DefaultDuration(h.SuccessWait, defaultSuccessWait)
+	h.SuccessWait = helpers.DefaultNumber(h.SuccessWait, defaultSuccessWait)
 	h.VPN.setDefaults()
 }
 

internal/configuration/settings/healthywait.go

@@ -27,31 +27,31 @@ func (h HealthyWait) validate() (err error) {
 // unset field of the receiver settings object.
 func (h *HealthyWait) copy() (copied HealthyWait) {
 	return HealthyWait{
-		Initial:  helpers.CopyDurationPtr(h.Initial),
+		Initial:  helpers.CopyPointer(h.Initial),
-		Addition: helpers.CopyDurationPtr(h.Addition),
+		Addition: helpers.CopyPointer(h.Addition),
 	}
 }
 
 // mergeWith merges the other settings into any
 // unset field of the receiver settings object.
 func (h *HealthyWait) mergeWith(other HealthyWait) {
-	h.Initial = helpers.MergeWithDurationPtr(h.Initial, other.Initial)
+	h.Initial = helpers.MergeWithPointer(h.Initial, other.Initial)
-	h.Addition = helpers.MergeWithDurationPtr(h.Addition, other.Addition)
+	h.Addition = helpers.MergeWithPointer(h.Addition, other.Addition)
 }
 
 // overrideWith overrides fields of the receiver
 // settings object with any field set in the other
 // settings.
 func (h *HealthyWait) overrideWith(other HealthyWait) {
-	h.Initial = helpers.OverrideWithDurationPtr(h.Initial, other.Initial)
+	h.Initial = helpers.OverrideWithPointer(h.Initial, other.Initial)
-	h.Addition = helpers.OverrideWithDurationPtr(h.Addition, other.Addition)
+	h.Addition = helpers.OverrideWithPointer(h.Addition, other.Addition)
 }
 
 func (h *HealthyWait) setDefaults() {
 	const initialDurationDefault = 6 * time.Second
 	const additionDurationDefault = 5 * time.Second
-	h.Initial = helpers.DefaultDurationPtr(h.Initial, initialDurationDefault)
+	h.Initial = helpers.DefaultPointer(h.Initial, initialDurationDefault)
-	h.Addition = helpers.DefaultDurationPtr(h.Addition, additionDurationDefault)
+	h.Addition = helpers.DefaultPointer(h.Addition, additionDurationDefault)
 }
 
 func (h HealthyWait) String() string {

internal/configuration/settings/helpers/copy.go

@@ -2,119 +2,19 @@ package helpers
 
 import (
 	"net/netip"
-	"time"
 
-	"github.com/qdm12/log"
+	"golang.org/x/exp/slices"
 )
 
-func CopyStringPtr(original *string) (copied *string) {
+func CopyPointer[T any](original *T) (copied *T) {
 	if original == nil {
 		return nil
 	}
-	copied = new(string)
+	copied = new(T)
 	*copied = *original
 	return copied
 }
 
-func CopyBoolPtr(original *bool) (copied *bool) {
+func CopySlice[T string | uint16 | netip.Addr | netip.Prefix](original []T) (copied []T) {
-	if original == nil {
+	return slices.Clone(original)
-		return nil
-	}
-	copied = new(bool)
-	*copied = *original
-	return copied
-}
-
-func CopyUint8Ptr(original *uint8) (copied *uint8) {
-	if original == nil {
-		return nil
-	}
-	copied = new(uint8)
-	*copied = *original
-	return copied
-}
-
-func CopyUint16Ptr(original *uint16) (copied *uint16) {
-	if original == nil {
-		return nil
-	}
-	copied = new(uint16)
-	*copied = *original
-	return copied
-}
-
-func CopyUint32Ptr(original *uint32) (copied *uint32) {
-	if original == nil {
-		return nil
-	}
-	copied = new(uint32)
-	*copied = *original
-	return copied
-}
-
-func CopyIntPtr(original *int) (copied *int) {
-	if original == nil {
-		return nil
-	}
-	copied = new(int)
-	*copied = *original
-	return copied
-}
-
-func CopyDurationPtr(original *time.Duration) (copied *time.Duration) {
-	if original == nil {
-		return nil
-	}
-	copied = new(time.Duration)
-	*copied = *original
-	return copied
-}
-
-func CopyLogLevelPtr(original *log.Level) (copied *log.Level) {
-	if original == nil {
-		return nil
-	}
-	copied = new(log.Level)
-	*copied = *original
-	return copied
-}
-
-func CopyStringSlice(original []string) (copied []string) {
-	if original == nil {
-		return nil
-	}
-
-	copied = make([]string, len(original))
-	copy(copied, original)
-	return copied
-}
-
-func CopyUint16Slice(original []uint16) (copied []uint16) {
-	if original == nil {
-		return nil
-	}
-
-	copied = make([]uint16, len(original))
-	copy(copied, original)
-	return copied
-}
-
-func CopyNetipPrefixesSlice(original []netip.Prefix) (copied []netip.Prefix) {
-	if original == nil {
-		return nil
-	}
-
-	copied = make([]netip.Prefix, len(original))
-	copy(copied, original)
-	return copied
-}
-
-func CopyNetipAddressesSlice(original []netip.Addr) (copied []netip.Addr) {
-	if original == nil {
-		return nil
-	}
-
-	copied = make([]netip.Addr, len(original))
-	copy(copied, original)
-	return copied
 }

internal/configuration/settings/helpers/default.go

@@ -2,56 +2,14 @@ package helpers
 
 import (
 	"net/netip"
-	"time"
-
-	"github.com/qdm12/log"
 )
 
-func DefaultInt(existing *int, defaultValue int) (
+func DefaultPointer[T any](existing *T, defaultValue T) (
-	result *int) {
+	result *T) {
 	if existing != nil {
 		return existing
 	}
-	result = new(int)
+	result = new(T)
-	*result = defaultValue
-	return result
-}
-
-func DefaultUint8(existing *uint8, defaultValue uint8) (
-	result *uint8) {
-	if existing != nil {
-		return existing
-	}
-	result = new(uint8)
-	*result = defaultValue
-	return result
-}
-
-func DefaultUint16(existing *uint16, defaultValue uint16) (
-	result *uint16) {
-	if existing != nil {
-		return existing
-	}
-	result = new(uint16)
-	*result = defaultValue
-	return result
-}
-func DefaultUint32(existing *uint32, defaultValue uint32) (
-	result *uint32) {
-	if existing != nil {
-		return existing
-	}
-	result = new(uint32)
-	*result = defaultValue
-	return result
-}
-
-func DefaultBool(existing *bool, defaultValue bool) (
-	result *bool) {
-	if existing != nil {
-		return existing
-	}
-	result = new(bool)
 	*result = defaultValue
 	return result
 }
@@ -64,43 +22,14 @@ func DefaultString(existing string, defaultValue string) (
 	return defaultValue
 }
 
-func DefaultStringPtr(existing *string, defaultValue string) (result *string) {
+func DefaultNumber[T Number](existing T, defaultValue T) ( //nolint:ireturn
-	if existing != nil {
+	result T) {
-		return existing
-	}
-	result = new(string)
-	*result = defaultValue
-	return result
-}
-
-func DefaultDuration(existing time.Duration,
-	defaultValue time.Duration) (result time.Duration) {
 	if existing != 0 {
 		return existing
 	}
 	return defaultValue
 }
 
-func DefaultDurationPtr(existing *time.Duration,
-	defaultValue time.Duration) (result *time.Duration) {
-	if existing != nil {
-		return existing
-	}
-	result = new(time.Duration)
-	*result = defaultValue
-	return result
-}
-
-func DefaultLogLevel(existing *log.Level,
-	defaultValue log.Level) (result *log.Level) {
-	if existing != nil {
-		return existing
-	}
-	result = new(log.Level)
-	*result = defaultValue
-	return result
-}
-
 func DefaultIP(existing netip.Addr, defaultValue netip.Addr) (
 	result netip.Addr) {
 	if existing.IsValid() {

internal/configuration/settings/helpers/generics.go

@@ -0,0 +1,10 @@
+package helpers
+
+import "time"
+
+type Number interface {
+	uint8 | uint16 | uint32 | uint64 | uint |
+		int8 | int16 | int32 | int64 | int |
+		float32 | float64 |
+		time.Duration
+}

internal/configuration/settings/helpers/merge.go

@@ -1,21 +1,17 @@
 package helpers
 
 import (
-	"fmt"
 	"net/http"
 	"net/netip"
-	"time"
-
-	"github.com/qdm12/log"
 )
 
-func MergeWithBool(existing, other *bool) (result *bool) {
+func MergeWithPointer[T any](existing, other *T) (result *T) {
 	if existing != nil {
 		return existing
 	} else if other == nil {
 		return nil
 	}
-	result = new(bool)
+	result = new(T)
 	*result = *other
 	return result
 }
@@ -27,114 +23,20 @@ func MergeWithString(existing, other string) (result string) {
 	return other
 }
 
-func MergeWithInt(existing, other int) (result int) {
+func MergeWithNumber[T Number](existing, other T) (result T) { //nolint:ireturn
 	if existing != 0 {
 		return existing
 	}
 	return other
 }
 
-func MergeWithFloat64(existing, other float64) (result float64) {
-	if existing != 0 {
-		return existing
-	}
-	return other
-}
-
-func MergeWithStringPtr(existing, other *string) (result *string) {
-	if existing != nil {
-		return existing
-	} else if other == nil {
-		return nil
-	}
-	result = new(string)
-	*result = *other
-	return result
-}
-
-func MergeWithIntPtr(existing, other *int) (result *int) {
-	if existing != nil {
-		return existing
-	} else if other == nil {
-		return nil
-	}
-	result = new(int)
-	*result = *other
-	return result
-}
-
-func MergeWithUint8(existing, other *uint8) (result *uint8) {
-	if existing != nil {
-		return existing
-	} else if other == nil {
-		return nil
-	}
-	result = new(uint8)
-	*result = *other
-	return result
-}
-
-func MergeWithUint16(existing, other *uint16) (result *uint16) {
-	if existing != nil {
-		return existing
-	} else if other == nil {
-		return nil
-	}
-	result = new(uint16)
-	*result = *other
-	return result
-}
-
-func MergeWithUint32(existing, other *uint32) (result *uint32) {
-	if existing != nil {
-		return existing
-	} else if other == nil {
-		return nil
-	}
-	result = new(uint32)
-	*result = *other
-	return result
-}
-
 func MergeWithIP(existing, other netip.Addr) (result netip.Addr) {
 	if existing.IsValid() {
 		return existing
-	} else if !other.IsValid() {
-		return existing
-	}
-
-	result, ok := netip.AddrFromSlice(other.AsSlice())
-	if !ok {
-		panic(fmt.Sprintf("failed copying other address: %s", other))
-	}
-	return result
-}
-
-func MergeWithDuration(existing, other time.Duration) (result time.Duration) {
-	if existing != 0 {
-		return existing
 	}
 	return other
 }
 
-func MergeWithDurationPtr(existing, other *time.Duration) (result *time.Duration) {
-	if existing != nil {
-		return existing
-	}
-	return other
-}
-
-func MergeWithLogLevel(existing, other *log.Level) (result *log.Level) {
-	if existing != nil {
-		return existing
-	} else if other == nil {
-		return nil
-	}
-	result = new(log.Level)
-	*result = *other
-	return result
-}
-
 func MergeWithHTTPHandler(existing, other http.Handler) (result http.Handler) {
 	if existing != nil {
 		return existing
@@ -142,13 +44,13 @@ func MergeWithHTTPHandler(existing, other http.Handler) (result http.Handler) {
 	return other
 }
 
-func MergeStringSlices(a, b []string) (result []string) {
+func MergeSlices[T comparable](a, b []T) (result []T) {
 	if a == nil && b == nil {
 		return nil
 	}
 
-	seen := make(map[string]struct{}, len(a)+len(b))
+	seen := make(map[T]struct{}, len(a)+len(b))
-	result = make([]string, 0, len(a)+len(b))
+	result = make([]T, 0, len(a)+len(b))
 	for _, s := range a {
 		if _, ok := seen[s]; ok {
 			continue // duplicate
@@ -165,79 +67,3 @@ func MergeStringSlices(a, b []string) (result []string) {
 	}
 	return result
 }
-
-func MergeUint16Slices(a, b []uint16) (result []uint16) {
-	if a == nil && b == nil {
-		return nil
-	}
-
-	seen := make(map[uint16]struct{}, len(a)+len(b))
-	result = make([]uint16, 0, len(a)+len(b))
-	for _, n := range a {
-		if _, ok := seen[n]; ok {
-			continue // duplicate
-		}
-		result = append(result, n)
-		seen[n] = struct{}{}
-	}
-	for _, n := range b {
-		if _, ok := seen[n]; ok {
-			continue // duplicate
-		}
-		result = append(result, n)
-		seen[n] = struct{}{}
-	}
-	return result
-}
-
-func MergeNetipAddressesSlices(a, b []netip.Addr) (result []netip.Addr) {
-	if a == nil && b == nil {
-		return nil
-	}
-
-	seen := make(map[string]struct{}, len(a)+len(b))
-	result = make([]netip.Addr, 0, len(a)+len(b))
-	for _, ip := range a {
-		key := ip.String()
-		if _, ok := seen[key]; ok {
-			continue // duplicate
-		}
-		result = append(result, ip)
-		seen[key] = struct{}{}
-	}
-	for _, ip := range b {
-		key := ip.String()
-		if _, ok := seen[key]; ok {
-			continue // duplicate
-		}
-		result = append(result, ip)
-		seen[key] = struct{}{}
-	}
-	return result
-}
-
-func MergeNetipPrefixesSlices(a, b []netip.Prefix) (result []netip.Prefix) {
-	if a == nil && b == nil {
-		return nil
-	}
-
-	seen := make(map[string]struct{}, len(a)+len(b))
-	result = make([]netip.Prefix, 0, len(a)+len(b))
-	for _, ipPrefix := range a {
-		key := ipPrefix.String()
-		if _, ok := seen[key]; ok {
-			continue // duplicate
-		}
-		result = append(result, ipPrefix)
-		seen[key] = struct{}{}
-	}
-	for _, ipPrefix := range b {
-		key := ipPrefix.String()
-		if _, ok := seen[key]; ok {
-			continue // duplicate
-		}
-		result = append(result, ipPrefix)
-		seen[key] = struct{}{}
-	}
-	return result
-}

internal/configuration/settings/helpers/override.go

@@ -1,19 +1,15 @@
 package helpers
 
 import (
-	"fmt"
 	"net/http"
 	"net/netip"
-	"time"
-
-	"github.com/qdm12/log"
 )
 
-func OverrideWithBool(existing, other *bool) (result *bool) {
+func OverrideWithPointer[T any](existing, other *T) (result *T) {
 	if other == nil {
 		return existing
 	}
-	result = new(bool)
+	result = new(T)
 	*result = *other
 	return result
 }
@@ -25,103 +21,20 @@ func OverrideWithString(existing, other string) (result string) {
 	return other
 }
 
-func OverrideWithInt(existing, other int) (result int) {
+func OverrideWithNumber[T Number](existing, other T) (result T) { //nolint:ireturn
 	if other == 0 {
 		return existing
 	}
 	return other
 }
 
-func OverrideWithFloat64(existing, other float64) (result float64) {
-	if other == 0 {
-		return existing
-	}
-	return other
-}
-
-func OverrideWithStringPtr(existing, other *string) (result *string) {
-	if other == nil {
-		return existing
-	}
-	result = new(string)
-	*result = *other
-	return result
-}
-
-func OverrideWithIntPtr(existing, other *int) (result *int) {
-	if other == nil {
-		return existing
-	}
-	result = new(int)
-	*result = *other
-	return result
-}
-
-func OverrideWithUint8(existing, other *uint8) (result *uint8) {
-	if other == nil {
-		return existing
-	}
-	result = new(uint8)
-	*result = *other
-	return result
-}
-
-func OverrideWithUint16(existing, other *uint16) (result *uint16) {
-	if other == nil {
-		return existing
-	}
-	result = new(uint16)
-	*result = *other
-	return result
-}
-
-func OverrideWithUint32(existing, other *uint32) (result *uint32) {
-	if other == nil {
-		return existing
-	}
-	result = new(uint32)
-	*result = *other
-	return result
-}
-
 func OverrideWithIP(existing, other netip.Addr) (result netip.Addr) {
 	if !other.IsValid() {
 		return existing
 	}
-	result, ok := netip.AddrFromSlice(other.AsSlice())
-	if !ok {
-		panic(fmt.Sprintf("failed copying other address: %s", other))
-	}
-	return result
-}
-
-func OverrideWithDuration(existing, other time.Duration) (
-	result time.Duration) {
-	if other == 0 {
-		return existing
-	}
 	return other
 }
 
-func OverrideWithDurationPtr(existing, other *time.Duration) (
-	result *time.Duration) {
-	if other == nil {
-		return existing
-	}
-	result = new(time.Duration)
-	*result = *other
-	return result
-}
-
-func OverrideWithLogLevel(existing, other *log.Level) (result *log.Level) {
-	if other == nil {
-		return existing
-	}
-	result = new(log.Level)
-	*result = *other
-	return result
-}
-
 func OverrideWithHTTPHandler(existing, other http.Handler) (result http.Handler) {
 	if other != nil {
 		return other
@@ -129,38 +42,11 @@ func OverrideWithHTTPHandler(existing, other http.Handler) (result http.Handler)
 	return existing
 }
 
-func OverrideWithStringSlice(existing, other []string) (result []string) {
+func OverrideWithSlice[T any](existing, other []T) (result []T) {
 	if other == nil {
 		return existing
 	}
-	result = make([]string, len(other))
+	result = make([]T, len(other))
-	copy(result, other)
-	return result
-}
-
-func OverrideWithUint16Slice(existing, other []uint16) (result []uint16) {
-	if other == nil {
-		return existing
-	}
-	result = make([]uint16, len(other))
-	copy(result, other)
-	return result
-}
-
-func OverrideWithNetipAddressesSlice(existing, other []netip.Addr) (result []netip.Addr) {
-	if other == nil {
-		return existing
-	}
-	result = make([]netip.Addr, len(other))
-	copy(result, other)
-	return result
-}
-
-func OverrideWithNetipPrefixesSlice(existing, other []netip.Prefix) (result []netip.Prefix) {
-	if other == nil {
-		return existing
-	}
-	result = make([]netip.Prefix, len(other))
 	copy(result, other)
 	return result
 }

internal/configuration/settings/httpproxy.go

@@ -56,12 +56,12 @@ func (h HTTPProxy) validate() (err error) {
 
 func (h *HTTPProxy) copy() (copied HTTPProxy) {
 	return HTTPProxy{
-		User:              helpers.CopyStringPtr(h.User),
+		User:              helpers.CopyPointer(h.User),
-		Password:          helpers.CopyStringPtr(h.Password),
+		Password:          helpers.CopyPointer(h.Password),
 		ListeningAddress:  h.ListeningAddress,
-		Enabled:           helpers.CopyBoolPtr(h.Enabled),
+		Enabled:           helpers.CopyPointer(h.Enabled),
-		Stealth:           helpers.CopyBoolPtr(h.Stealth),
+		Stealth:           helpers.CopyPointer(h.Stealth),
-		Log:               helpers.CopyBoolPtr(h.Log),
+		Log:               helpers.CopyPointer(h.Log),
 		ReadHeaderTimeout: h.ReadHeaderTimeout,
 		ReadTimeout:       h.ReadTimeout,
 	}
@@ -70,41 +70,41 @@ func (h *HTTPProxy) copy() (copied HTTPProxy) {
 // mergeWith merges the other settings into any
 // unset field of the receiver settings object.
 func (h *HTTPProxy) mergeWith(other HTTPProxy) {
-	h.User = helpers.MergeWithStringPtr(h.User, other.User)
+	h.User = helpers.MergeWithPointer(h.User, other.User)
-	h.Password = helpers.MergeWithStringPtr(h.Password, other.Password)
+	h.Password = helpers.MergeWithPointer(h.Password, other.Password)
 	h.ListeningAddress = helpers.MergeWithString(h.ListeningAddress, other.ListeningAddress)
-	h.Enabled = helpers.MergeWithBool(h.Enabled, other.Enabled)
+	h.Enabled = helpers.MergeWithPointer(h.Enabled, other.Enabled)
-	h.Stealth = helpers.MergeWithBool(h.Stealth, other.Stealth)
+	h.Stealth = helpers.MergeWithPointer(h.Stealth, other.Stealth)
-	h.Log = helpers.MergeWithBool(h.Log, other.Log)
+	h.Log = helpers.MergeWithPointer(h.Log, other.Log)
-	h.ReadHeaderTimeout = helpers.MergeWithDuration(h.ReadHeaderTimeout, other.ReadHeaderTimeout)
+	h.ReadHeaderTimeout = helpers.MergeWithNumber(h.ReadHeaderTimeout, other.ReadHeaderTimeout)
-	h.ReadTimeout = helpers.MergeWithDuration(h.ReadTimeout, other.ReadTimeout)
+	h.ReadTimeout = helpers.MergeWithNumber(h.ReadTimeout, other.ReadTimeout)
 }
 
 // overrideWith overrides fields of the receiver
 // settings object with any field set in the other
 // settings.
 func (h *HTTPProxy) overrideWith(other HTTPProxy) {
-	h.User = helpers.OverrideWithStringPtr(h.User, other.User)
+	h.User = helpers.OverrideWithPointer(h.User, other.User)
-	h.Password = helpers.OverrideWithStringPtr(h.Password, other.Password)
+	h.Password = helpers.OverrideWithPointer(h.Password, other.Password)
 	h.ListeningAddress = helpers.OverrideWithString(h.ListeningAddress, other.ListeningAddress)
-	h.Enabled = helpers.OverrideWithBool(h.Enabled, other.Enabled)
+	h.Enabled = helpers.OverrideWithPointer(h.Enabled, other.Enabled)
-	h.Stealth = helpers.OverrideWithBool(h.Stealth, other.Stealth)
+	h.Stealth = helpers.OverrideWithPointer(h.Stealth, other.Stealth)
-	h.Log = helpers.OverrideWithBool(h.Log, other.Log)
+	h.Log = helpers.OverrideWithPointer(h.Log, other.Log)
-	h.ReadHeaderTimeout = helpers.OverrideWithDuration(h.ReadHeaderTimeout, other.ReadHeaderTimeout)
+	h.ReadHeaderTimeout = helpers.OverrideWithNumber(h.ReadHeaderTimeout, other.ReadHeaderTimeout)
-	h.ReadTimeout = helpers.OverrideWithDuration(h.ReadTimeout, other.ReadTimeout)
+	h.ReadTimeout = helpers.OverrideWithNumber(h.ReadTimeout, other.ReadTimeout)
 }
 
 func (h *HTTPProxy) setDefaults() {
-	h.User = helpers.DefaultStringPtr(h.User, "")
+	h.User = helpers.DefaultPointer(h.User, "")
-	h.Password = helpers.DefaultStringPtr(h.Password, "")
+	h.Password = helpers.DefaultPointer(h.Password, "")
 	h.ListeningAddress = helpers.DefaultString(h.ListeningAddress, ":8888")
-	h.Enabled = helpers.DefaultBool(h.Enabled, false)
+	h.Enabled = helpers.DefaultPointer(h.Enabled, false)
-	h.Stealth = helpers.DefaultBool(h.Stealth, false)
+	h.Stealth = helpers.DefaultPointer(h.Stealth, false)
-	h.Log = helpers.DefaultBool(h.Log, false)
+	h.Log = helpers.DefaultPointer(h.Log, false)
 	const defaultReadHeaderTimeout = time.Second
-	h.ReadHeaderTimeout = helpers.DefaultDuration(h.ReadHeaderTimeout, defaultReadHeaderTimeout)
+	h.ReadHeaderTimeout = helpers.DefaultNumber(h.ReadHeaderTimeout, defaultReadHeaderTimeout)
 	const defaultReadTimeout = 3 * time.Second
-	h.ReadTimeout = helpers.DefaultDuration(h.ReadTimeout, defaultReadTimeout)
+	h.ReadTimeout = helpers.DefaultNumber(h.ReadTimeout, defaultReadTimeout)
 }
 
 func (h HTTPProxy) String() string {

internal/configuration/settings/log.go

@@ -19,25 +19,25 @@ func (l Log) validate() (err error) {
 
 func (l *Log) copy() (copied Log) {
 	return Log{
-		Level: helpers.CopyLogLevelPtr(l.Level),
+		Level: helpers.CopyPointer(l.Level),
 	}
 }
 
 // mergeWith merges the other settings into any
 // unset field of the receiver settings object.
 func (l *Log) mergeWith(other Log) {
-	l.Level = helpers.MergeWithLogLevel(l.Level, other.Level)
+	l.Level = helpers.MergeWithPointer(l.Level, other.Level)
 }
 
 // overrideWith overrides fields of the receiver
 // settings object with any field set in the other
 // settings.
 func (l *Log) overrideWith(other Log) {
-	l.Level = helpers.OverrideWithLogLevel(l.Level, other.Level)
+	l.Level = helpers.OverrideWithPointer(l.Level, other.Level)
 }
 
 func (l *Log) setDefaults() {
-	l.Level = helpers.DefaultLogLevel(l.Level, log.LevelInfo)
+	l.Level = helpers.DefaultPointer(l.Level, log.LevelInfo)
 }
 
 func (l Log) String() string {

internal/configuration/settings/openvpn.go

@@ -244,21 +244,21 @@ func validateOpenVPNEncryptedKey(vpnProvider,
 func (o *OpenVPN) copy() (copied OpenVPN) {
 	return OpenVPN{
 		Version:       o.Version,
-		User:          helpers.CopyStringPtr(o.User),
+		User:          helpers.CopyPointer(o.User),
-		Password:      helpers.CopyStringPtr(o.Password),
+		Password:      helpers.CopyPointer(o.Password),
-		ConfFile:      helpers.CopyStringPtr(o.ConfFile),
+		ConfFile:      helpers.CopyPointer(o.ConfFile),
-		Ciphers:       helpers.CopyStringSlice(o.Ciphers),
+		Ciphers:       helpers.CopySlice(o.Ciphers),
-		Auth:          helpers.CopyStringPtr(o.Auth),
+		Auth:          helpers.CopyPointer(o.Auth),
-		Cert:          helpers.CopyStringPtr(o.Cert),
+		Cert:          helpers.CopyPointer(o.Cert),
-		Key:           helpers.CopyStringPtr(o.Key),
+		Key:           helpers.CopyPointer(o.Key),
-		EncryptedKey:  helpers.CopyStringPtr(o.EncryptedKey),
+		EncryptedKey:  helpers.CopyPointer(o.EncryptedKey),
-		KeyPassphrase: helpers.CopyStringPtr(o.KeyPassphrase),
+		KeyPassphrase: helpers.CopyPointer(o.KeyPassphrase),
-		PIAEncPreset:  helpers.CopyStringPtr(o.PIAEncPreset),
+		PIAEncPreset:  helpers.CopyPointer(o.PIAEncPreset),
-		MSSFix:        helpers.CopyUint16Ptr(o.MSSFix),
+		MSSFix:        helpers.CopyPointer(o.MSSFix),
 		Interface:     o.Interface,
 		ProcessUser:   o.ProcessUser,
-		Verbosity:     helpers.CopyIntPtr(o.Verbosity),
+		Verbosity:     helpers.CopyPointer(o.Verbosity),
-		Flags:         helpers.CopyStringSlice(o.Flags),
+		Flags:         helpers.CopySlice(o.Flags),
 	}
 }
 
@@ -266,21 +266,21 @@ func (o *OpenVPN) copy() (copied OpenVPN) {
 // unset field of the receiver settings object.
 func (o *OpenVPN) mergeWith(other OpenVPN) {
 	o.Version = helpers.MergeWithString(o.Version, other.Version)
-	o.User = helpers.MergeWithStringPtr(o.User, other.User)
+	o.User = helpers.MergeWithPointer(o.User, other.User)
-	o.Password = helpers.MergeWithStringPtr(o.Password, other.Password)
+	o.Password = helpers.MergeWithPointer(o.Password, other.Password)
-	o.ConfFile = helpers.MergeWithStringPtr(o.ConfFile, other.ConfFile)
+	o.ConfFile = helpers.MergeWithPointer(o.ConfFile, other.ConfFile)
-	o.Ciphers = helpers.MergeStringSlices(o.Ciphers, other.Ciphers)
+	o.Ciphers = helpers.MergeSlices(o.Ciphers, other.Ciphers)
-	o.Auth = helpers.MergeWithStringPtr(o.Auth, other.Auth)
+	o.Auth = helpers.MergeWithPointer(o.Auth, other.Auth)
-	o.Cert = helpers.MergeWithStringPtr(o.Cert, other.Cert)
+	o.Cert = helpers.MergeWithPointer(o.Cert, other.Cert)
-	o.Key = helpers.MergeWithStringPtr(o.Key, other.Key)
+	o.Key = helpers.MergeWithPointer(o.Key, other.Key)
-	o.EncryptedKey = helpers.MergeWithStringPtr(o.EncryptedKey, other.EncryptedKey)
+	o.EncryptedKey = helpers.MergeWithPointer(o.EncryptedKey, other.EncryptedKey)
-	o.KeyPassphrase = helpers.MergeWithStringPtr(o.KeyPassphrase, other.KeyPassphrase)
+	o.KeyPassphrase = helpers.MergeWithPointer(o.KeyPassphrase, other.KeyPassphrase)
-	o.PIAEncPreset = helpers.MergeWithStringPtr(o.PIAEncPreset, other.PIAEncPreset)
+	o.PIAEncPreset = helpers.MergeWithPointer(o.PIAEncPreset, other.PIAEncPreset)
-	o.MSSFix = helpers.MergeWithUint16(o.MSSFix, other.MSSFix)
+	o.MSSFix = helpers.MergeWithPointer(o.MSSFix, other.MSSFix)
 	o.Interface = helpers.MergeWithString(o.Interface, other.Interface)
 	o.ProcessUser = helpers.MergeWithString(o.ProcessUser, other.ProcessUser)
-	o.Verbosity = helpers.MergeWithIntPtr(o.Verbosity, other.Verbosity)
+	o.Verbosity = helpers.MergeWithPointer(o.Verbosity, other.Verbosity)
-	o.Flags = helpers.MergeStringSlices(o.Flags, other.Flags)
+	o.Flags = helpers.MergeSlices(o.Flags, other.Flags)
 }
 
 // overrideWith overrides fields of the receiver
@@ -288,48 +288,48 @@ func (o *OpenVPN) mergeWith(other OpenVPN) {
 // settings.
 func (o *OpenVPN) overrideWith(other OpenVPN) {
 	o.Version = helpers.OverrideWithString(o.Version, other.Version)
-	o.User = helpers.OverrideWithStringPtr(o.User, other.User)
+	o.User = helpers.OverrideWithPointer(o.User, other.User)
-	o.Password = helpers.OverrideWithStringPtr(o.Password, other.Password)
+	o.Password = helpers.OverrideWithPointer(o.Password, other.Password)
-	o.ConfFile = helpers.OverrideWithStringPtr(o.ConfFile, other.ConfFile)
+	o.ConfFile = helpers.OverrideWithPointer(o.ConfFile, other.ConfFile)
-	o.Ciphers = helpers.OverrideWithStringSlice(o.Ciphers, other.Ciphers)
+	o.Ciphers = helpers.OverrideWithSlice(o.Ciphers, other.Ciphers)
-	o.Auth = helpers.OverrideWithStringPtr(o.Auth, other.Auth)
+	o.Auth = helpers.OverrideWithPointer(o.Auth, other.Auth)
-	o.Cert = helpers.OverrideWithStringPtr(o.Cert, other.Cert)
+	o.Cert = helpers.OverrideWithPointer(o.Cert, other.Cert)
-	o.Key = helpers.OverrideWithStringPtr(o.Key, other.Key)
+	o.Key = helpers.OverrideWithPointer(o.Key, other.Key)
-	o.EncryptedKey = helpers.OverrideWithStringPtr(o.EncryptedKey, other.EncryptedKey)
+	o.EncryptedKey = helpers.OverrideWithPointer(o.EncryptedKey, other.EncryptedKey)
-	o.KeyPassphrase = helpers.OverrideWithStringPtr(o.KeyPassphrase, other.KeyPassphrase)
+	o.KeyPassphrase = helpers.OverrideWithPointer(o.KeyPassphrase, other.KeyPassphrase)
-	o.PIAEncPreset = helpers.OverrideWithStringPtr(o.PIAEncPreset, other.PIAEncPreset)
+	o.PIAEncPreset = helpers.OverrideWithPointer(o.PIAEncPreset, other.PIAEncPreset)
-	o.MSSFix = helpers.OverrideWithUint16(o.MSSFix, other.MSSFix)
+	o.MSSFix = helpers.OverrideWithPointer(o.MSSFix, other.MSSFix)
 	o.Interface = helpers.OverrideWithString(o.Interface, other.Interface)
 	o.ProcessUser = helpers.OverrideWithString(o.ProcessUser, other.ProcessUser)
-	o.Verbosity = helpers.OverrideWithIntPtr(o.Verbosity, other.Verbosity)
+	o.Verbosity = helpers.OverrideWithPointer(o.Verbosity, other.Verbosity)
-	o.Flags = helpers.OverrideWithStringSlice(o.Flags, other.Flags)
+	o.Flags = helpers.OverrideWithSlice(o.Flags, other.Flags)
 }
 
 func (o *OpenVPN) setDefaults(vpnProvider string) {
 	o.Version = helpers.DefaultString(o.Version, openvpn.Openvpn25)
-	o.User = helpers.DefaultStringPtr(o.User, "")
+	o.User = helpers.DefaultPointer(o.User, "")
 	if vpnProvider == providers.Mullvad {
-		o.Password = helpers.DefaultStringPtr(o.Password, "m")
+		o.Password = helpers.DefaultPointer(o.Password, "m")
 	} else {
-		o.Password = helpers.DefaultStringPtr(o.Password, "")
+		o.Password = helpers.DefaultPointer(o.Password, "")
 	}
 
-	o.ConfFile = helpers.DefaultStringPtr(o.ConfFile, "")
+	o.ConfFile = helpers.DefaultPointer(o.ConfFile, "")
-	o.Auth = helpers.DefaultStringPtr(o.Auth, "")
+	o.Auth = helpers.DefaultPointer(o.Auth, "")
-	o.Cert = helpers.DefaultStringPtr(o.Cert, "")
+	o.Cert = helpers.DefaultPointer(o.Cert, "")
-	o.Key = helpers.DefaultStringPtr(o.Key, "")
+	o.Key = helpers.DefaultPointer(o.Key, "")
-	o.EncryptedKey = helpers.DefaultStringPtr(o.EncryptedKey, "")
+	o.EncryptedKey = helpers.DefaultPointer(o.EncryptedKey, "")
-	o.KeyPassphrase = helpers.DefaultStringPtr(o.KeyPassphrase, "")
+	o.KeyPassphrase = helpers.DefaultPointer(o.KeyPassphrase, "")
 
 	var defaultEncPreset string
 	if vpnProvider == providers.PrivateInternetAccess {
 		defaultEncPreset = presets.Strong
 	}
-	o.PIAEncPreset = helpers.DefaultStringPtr(o.PIAEncPreset, defaultEncPreset)
+	o.PIAEncPreset = helpers.DefaultPointer(o.PIAEncPreset, defaultEncPreset)
-	o.MSSFix = helpers.DefaultUint16(o.MSSFix, 0)
+	o.MSSFix = helpers.DefaultPointer(o.MSSFix, 0)
 	o.Interface = helpers.DefaultString(o.Interface, "tun0")
 	o.ProcessUser = helpers.DefaultString(o.ProcessUser, "root")
-	o.Verbosity = helpers.DefaultInt(o.Verbosity, 1)
+	o.Verbosity = helpers.DefaultPointer(o.Verbosity, 1)
 }
 
 func (o OpenVPN) String() string {

internal/configuration/settings/openvpnselection.go

@@ -130,37 +130,37 @@ func (o OpenVPNSelection) validate(vpnProvider string) (err error) {
 
 func (o *OpenVPNSelection) copy() (copied OpenVPNSelection) {
 	return OpenVPNSelection{
-		ConfFile:     helpers.CopyStringPtr(o.ConfFile),
+		ConfFile:     helpers.CopyPointer(o.ConfFile),
-		TCP:          helpers.CopyBoolPtr(o.TCP),
+		TCP:          helpers.CopyPointer(o.TCP),
-		CustomPort:   helpers.CopyUint16Ptr(o.CustomPort),
+		CustomPort:   helpers.CopyPointer(o.CustomPort),
-		PIAEncPreset: helpers.CopyStringPtr(o.PIAEncPreset),
+		PIAEncPreset: helpers.CopyPointer(o.PIAEncPreset),
 	}
 }
 
 func (o *OpenVPNSelection) mergeWith(other OpenVPNSelection) {
-	o.ConfFile = helpers.MergeWithStringPtr(o.ConfFile, other.ConfFile)
+	o.ConfFile = helpers.MergeWithPointer(o.ConfFile, other.ConfFile)
-	o.TCP = helpers.MergeWithBool(o.TCP, other.TCP)
+	o.TCP = helpers.MergeWithPointer(o.TCP, other.TCP)
-	o.CustomPort = helpers.MergeWithUint16(o.CustomPort, other.CustomPort)
+	o.CustomPort = helpers.MergeWithPointer(o.CustomPort, other.CustomPort)
-	o.PIAEncPreset = helpers.MergeWithStringPtr(o.PIAEncPreset, other.PIAEncPreset)
+	o.PIAEncPreset = helpers.MergeWithPointer(o.PIAEncPreset, other.PIAEncPreset)
 }
 
 func (o *OpenVPNSelection) overrideWith(other OpenVPNSelection) {
-	o.ConfFile = helpers.OverrideWithStringPtr(o.ConfFile, other.ConfFile)
+	o.ConfFile = helpers.OverrideWithPointer(o.ConfFile, other.ConfFile)
-	o.TCP = helpers.OverrideWithBool(o.TCP, other.TCP)
+	o.TCP = helpers.OverrideWithPointer(o.TCP, other.TCP)
-	o.CustomPort = helpers.OverrideWithUint16(o.CustomPort, other.CustomPort)
+	o.CustomPort = helpers.OverrideWithPointer(o.CustomPort, other.CustomPort)
-	o.PIAEncPreset = helpers.OverrideWithStringPtr(o.PIAEncPreset, other.PIAEncPreset)
+	o.PIAEncPreset = helpers.OverrideWithPointer(o.PIAEncPreset, other.PIAEncPreset)
 }
 
 func (o *OpenVPNSelection) setDefaults(vpnProvider string) {
-	o.ConfFile = helpers.DefaultStringPtr(o.ConfFile, "")
+	o.ConfFile = helpers.DefaultPointer(o.ConfFile, "")
-	o.TCP = helpers.DefaultBool(o.TCP, false)
+	o.TCP = helpers.DefaultPointer(o.TCP, false)
-	o.CustomPort = helpers.DefaultUint16(o.CustomPort, 0)
+	o.CustomPort = helpers.DefaultPointer(o.CustomPort, 0)
 
 	var defaultEncPreset string
 	if vpnProvider == providers.PrivateInternetAccess {
 		defaultEncPreset = presets.Strong
 	}
-	o.PIAEncPreset = helpers.DefaultStringPtr(o.PIAEncPreset, defaultEncPreset)
+	o.PIAEncPreset = helpers.DefaultPointer(o.PIAEncPreset, defaultEncPreset)
 }
 
 func (o OpenVPNSelection) String() string {

internal/configuration/settings/portforward.go

@@ -47,24 +47,24 @@ func (p PortForwarding) validate(vpnProvider string) (err error) {
 
 func (p *PortForwarding) copy() (copied PortForwarding) {
 	return PortForwarding{
-		Enabled:  helpers.CopyBoolPtr(p.Enabled),
+		Enabled:  helpers.CopyPointer(p.Enabled),
-		Filepath: helpers.CopyStringPtr(p.Filepath),
+		Filepath: helpers.CopyPointer(p.Filepath),
 	}
 }
 
 func (p *PortForwarding) mergeWith(other PortForwarding) {
-	p.Enabled = helpers.MergeWithBool(p.Enabled, other.Enabled)
+	p.Enabled = helpers.MergeWithPointer(p.Enabled, other.Enabled)
-	p.Filepath = helpers.MergeWithStringPtr(p.Filepath, other.Filepath)
+	p.Filepath = helpers.MergeWithPointer(p.Filepath, other.Filepath)
 }
 
 func (p *PortForwarding) overrideWith(other PortForwarding) {
-	p.Enabled = helpers.OverrideWithBool(p.Enabled, other.Enabled)
+	p.Enabled = helpers.OverrideWithPointer(p.Enabled, other.Enabled)
-	p.Filepath = helpers.OverrideWithStringPtr(p.Filepath, other.Filepath)
+	p.Filepath = helpers.OverrideWithPointer(p.Filepath, other.Filepath)
 }
 
 func (p *PortForwarding) setDefaults() {
-	p.Enabled = helpers.DefaultBool(p.Enabled, false)
+	p.Enabled = helpers.DefaultPointer(p.Enabled, false)
-	p.Filepath = helpers.DefaultStringPtr(p.Filepath, "/tmp/gluetun/forwarded_port")
+	p.Filepath = helpers.DefaultPointer(p.Filepath, "/tmp/gluetun/forwarded_port")
 }
 
 func (p PortForwarding) String() string {

internal/configuration/settings/provider.go

@@ -58,26 +58,26 @@ func (p *Provider) validate(vpnType string, storage Storage) (err error) {
 
 func (p *Provider) copy() (copied Provider) {
 	return Provider{
-		Name:            helpers.CopyStringPtr(p.Name),
+		Name:            helpers.CopyPointer(p.Name),
 		ServerSelection: p.ServerSelection.copy(),
 		PortForwarding:  p.PortForwarding.copy(),
 	}
 }
 
 func (p *Provider) mergeWith(other Provider) {
-	p.Name = helpers.MergeWithStringPtr(p.Name, other.Name)
+	p.Name = helpers.MergeWithPointer(p.Name, other.Name)
 	p.ServerSelection.mergeWith(other.ServerSelection)
 	p.PortForwarding.mergeWith(other.PortForwarding)
 }
 
 func (p *Provider) overrideWith(other Provider) {
-	p.Name = helpers.OverrideWithStringPtr(p.Name, other.Name)
+	p.Name = helpers.OverrideWithPointer(p.Name, other.Name)
 	p.ServerSelection.overrideWith(other.ServerSelection)
 	p.PortForwarding.overrideWith(other.PortForwarding)
 }
 
 func (p *Provider) setDefaults() {
-	p.Name = helpers.DefaultStringPtr(p.Name, providers.PrivateInternetAccess)
+	p.Name = helpers.DefaultPointer(p.Name, providers.PrivateInternetAccess)
 	p.ServerSelection.setDefaults(*p.Name)
 	p.PortForwarding.setDefaults()
 }

internal/configuration/settings/publicip.go

@@ -42,25 +42,25 @@ func (p PublicIP) validate() (err error) {
 
 func (p *PublicIP) copy() (copied PublicIP) {
 	return PublicIP{
-		Period:     helpers.CopyDurationPtr(p.Period),
+		Period:     helpers.CopyPointer(p.Period),
-		IPFilepath: helpers.CopyStringPtr(p.IPFilepath),
+		IPFilepath: helpers.CopyPointer(p.IPFilepath),
 	}
 }
 
 func (p *PublicIP) mergeWith(other PublicIP) {
-	p.Period = helpers.MergeWithDurationPtr(p.Period, other.Period)
+	p.Period = helpers.MergeWithPointer(p.Period, other.Period)
-	p.IPFilepath = helpers.MergeWithStringPtr(p.IPFilepath, other.IPFilepath)
+	p.IPFilepath = helpers.MergeWithPointer(p.IPFilepath, other.IPFilepath)
 }
 
 func (p *PublicIP) overrideWith(other PublicIP) {
-	p.Period = helpers.OverrideWithDurationPtr(p.Period, other.Period)
+	p.Period = helpers.OverrideWithPointer(p.Period, other.Period)
-	p.IPFilepath = helpers.OverrideWithStringPtr(p.IPFilepath, other.IPFilepath)
+	p.IPFilepath = helpers.OverrideWithPointer(p.IPFilepath, other.IPFilepath)
 }
 
 func (p *PublicIP) setDefaults() {
 	const defaultPeriod = 12 * time.Hour
-	p.Period = helpers.DefaultDurationPtr(p.Period, defaultPeriod)
+	p.Period = helpers.DefaultPointer(p.Period, defaultPeriod)
-	p.IPFilepath = helpers.DefaultStringPtr(p.IPFilepath, "/tmp/gluetun/ip")
+	p.IPFilepath = helpers.DefaultPointer(p.IPFilepath, "/tmp/gluetun/ip")
 }
 
 func (p PublicIP) String() string {

internal/configuration/settings/server.go

@@ -43,29 +43,29 @@ func (c ControlServer) validate() (err error) {
 
 func (c *ControlServer) copy() (copied ControlServer) {
 	return ControlServer{
-		Address: helpers.CopyStringPtr(c.Address),
+		Address: helpers.CopyPointer(c.Address),
-		Log:     helpers.CopyBoolPtr(c.Log),
+		Log:     helpers.CopyPointer(c.Log),
 	}
 }
 
 // mergeWith merges the other settings into any
 // unset field of the receiver settings object.
 func (c *ControlServer) mergeWith(other ControlServer) {
-	c.Address = helpers.MergeWithStringPtr(c.Address, other.Address)
+	c.Address = helpers.MergeWithPointer(c.Address, other.Address)
-	c.Log = helpers.MergeWithBool(c.Log, other.Log)
+	c.Log = helpers.MergeWithPointer(c.Log, other.Log)
 }
 
 // overrideWith overrides fields of the receiver
 // settings object with any field set in the other
 // settings.
 func (c *ControlServer) overrideWith(other ControlServer) {
-	c.Address = helpers.OverrideWithStringPtr(c.Address, other.Address)
+	c.Address = helpers.OverrideWithPointer(c.Address, other.Address)
-	c.Log = helpers.OverrideWithBool(c.Log, other.Log)
+	c.Log = helpers.OverrideWithPointer(c.Log, other.Log)
 }
 
 func (c *ControlServer) setDefaults() {
-	c.Address = helpers.DefaultStringPtr(c.Address, ":8000")
+	c.Address = helpers.DefaultPointer(c.Address, ":8000")
-	c.Log = helpers.DefaultBool(c.Log, true)
+	c.Log = helpers.DefaultPointer(c.Log, true)
 }
 
 func (c ControlServer) String() string {

internal/configuration/settings/serverselection.go

@@ -203,18 +203,18 @@ func (ss *ServerSelection) copy() (copied ServerSelection) {
 	return ServerSelection{
 		VPN:          ss.VPN,
 		TargetIP:     ss.TargetIP,
-		Countries:    helpers.CopyStringSlice(ss.Countries),
+		Countries:    helpers.CopySlice(ss.Countries),
-		Regions:      helpers.CopyStringSlice(ss.Regions),
+		Regions:      helpers.CopySlice(ss.Regions),
-		Cities:       helpers.CopyStringSlice(ss.Cities),
+		Cities:       helpers.CopySlice(ss.Cities),
-		ISPs:         helpers.CopyStringSlice(ss.ISPs),
+		ISPs:         helpers.CopySlice(ss.ISPs),
-		Hostnames:    helpers.CopyStringSlice(ss.Hostnames),
+		Hostnames:    helpers.CopySlice(ss.Hostnames),
-		Names:        helpers.CopyStringSlice(ss.Names),
+		Names:        helpers.CopySlice(ss.Names),
-		Numbers:      helpers.CopyUint16Slice(ss.Numbers),
+		Numbers:      helpers.CopySlice(ss.Numbers),
-		OwnedOnly:    helpers.CopyBoolPtr(ss.OwnedOnly),
+		OwnedOnly:    helpers.CopyPointer(ss.OwnedOnly),
-		FreeOnly:     helpers.CopyBoolPtr(ss.FreeOnly),
+		FreeOnly:     helpers.CopyPointer(ss.FreeOnly),
-		PremiumOnly:  helpers.CopyBoolPtr(ss.PremiumOnly),
+		PremiumOnly:  helpers.CopyPointer(ss.PremiumOnly),
-		StreamOnly:   helpers.CopyBoolPtr(ss.StreamOnly),
+		StreamOnly:   helpers.CopyPointer(ss.StreamOnly),
-		MultiHopOnly: helpers.CopyBoolPtr(ss.MultiHopOnly),
+		MultiHopOnly: helpers.CopyPointer(ss.MultiHopOnly),
 		OpenVPN:      ss.OpenVPN.copy(),
 		Wireguard:    ss.Wireguard.copy(),
 	}
@@ -223,18 +223,18 @@ func (ss *ServerSelection) copy() (copied ServerSelection) {
 func (ss *ServerSelection) mergeWith(other ServerSelection) {
 	ss.VPN = helpers.MergeWithString(ss.VPN, other.VPN)
 	ss.TargetIP = helpers.MergeWithIP(ss.TargetIP, other.TargetIP)
-	ss.Countries = helpers.MergeStringSlices(ss.Countries, other.Countries)
+	ss.Countries = helpers.MergeSlices(ss.Countries, other.Countries)
-	ss.Regions = helpers.MergeStringSlices(ss.Regions, other.Regions)
+	ss.Regions = helpers.MergeSlices(ss.Regions, other.Regions)
-	ss.Cities = helpers.MergeStringSlices(ss.Cities, other.Cities)
+	ss.Cities = helpers.MergeSlices(ss.Cities, other.Cities)
-	ss.ISPs = helpers.MergeStringSlices(ss.ISPs, other.ISPs)
+	ss.ISPs = helpers.MergeSlices(ss.ISPs, other.ISPs)
-	ss.Hostnames = helpers.MergeStringSlices(ss.Hostnames, other.Hostnames)
+	ss.Hostnames = helpers.MergeSlices(ss.Hostnames, other.Hostnames)
-	ss.Names = helpers.MergeStringSlices(ss.Names, other.Names)
+	ss.Names = helpers.MergeSlices(ss.Names, other.Names)
-	ss.Numbers = helpers.MergeUint16Slices(ss.Numbers, other.Numbers)
+	ss.Numbers = helpers.MergeSlices(ss.Numbers, other.Numbers)
-	ss.OwnedOnly = helpers.MergeWithBool(ss.OwnedOnly, other.OwnedOnly)
+	ss.OwnedOnly = helpers.MergeWithPointer(ss.OwnedOnly, other.OwnedOnly)
-	ss.FreeOnly = helpers.MergeWithBool(ss.FreeOnly, other.FreeOnly)
+	ss.FreeOnly = helpers.MergeWithPointer(ss.FreeOnly, other.FreeOnly)
-	ss.PremiumOnly = helpers.MergeWithBool(ss.PremiumOnly, other.PremiumOnly)
+	ss.PremiumOnly = helpers.MergeWithPointer(ss.PremiumOnly, other.PremiumOnly)
-	ss.StreamOnly = helpers.MergeWithBool(ss.StreamOnly, other.StreamOnly)
+	ss.StreamOnly = helpers.MergeWithPointer(ss.StreamOnly, other.StreamOnly)
-	ss.MultiHopOnly = helpers.MergeWithBool(ss.MultiHopOnly, other.MultiHopOnly)
+	ss.MultiHopOnly = helpers.MergeWithPointer(ss.MultiHopOnly, other.MultiHopOnly)
 
 	ss.OpenVPN.mergeWith(other.OpenVPN)
 	ss.Wireguard.mergeWith(other.Wireguard)
@@ -243,18 +243,18 @@ func (ss *ServerSelection) mergeWith(other ServerSelection) {
 func (ss *ServerSelection) overrideWith(other ServerSelection) {
 	ss.VPN = helpers.OverrideWithString(ss.VPN, other.VPN)
 	ss.TargetIP = helpers.OverrideWithIP(ss.TargetIP, other.TargetIP)
-	ss.Countries = helpers.OverrideWithStringSlice(ss.Countries, other.Countries)
+	ss.Countries = helpers.OverrideWithSlice(ss.Countries, other.Countries)
-	ss.Regions = helpers.OverrideWithStringSlice(ss.Regions, other.Regions)
+	ss.Regions = helpers.OverrideWithSlice(ss.Regions, other.Regions)
-	ss.Cities = helpers.OverrideWithStringSlice(ss.Cities, other.Cities)
+	ss.Cities = helpers.OverrideWithSlice(ss.Cities, other.Cities)
-	ss.ISPs = helpers.OverrideWithStringSlice(ss.ISPs, other.ISPs)
+	ss.ISPs = helpers.OverrideWithSlice(ss.ISPs, other.ISPs)
-	ss.Hostnames = helpers.OverrideWithStringSlice(ss.Hostnames, other.Hostnames)
+	ss.Hostnames = helpers.OverrideWithSlice(ss.Hostnames, other.Hostnames)
-	ss.Names = helpers.OverrideWithStringSlice(ss.Names, other.Names)
+	ss.Names = helpers.OverrideWithSlice(ss.Names, other.Names)
-	ss.Numbers = helpers.OverrideWithUint16Slice(ss.Numbers, other.Numbers)
+	ss.Numbers = helpers.OverrideWithSlice(ss.Numbers, other.Numbers)
-	ss.OwnedOnly = helpers.OverrideWithBool(ss.OwnedOnly, other.OwnedOnly)
+	ss.OwnedOnly = helpers.OverrideWithPointer(ss.OwnedOnly, other.OwnedOnly)
-	ss.FreeOnly = helpers.OverrideWithBool(ss.FreeOnly, other.FreeOnly)
+	ss.FreeOnly = helpers.OverrideWithPointer(ss.FreeOnly, other.FreeOnly)
-	ss.PremiumOnly = helpers.OverrideWithBool(ss.PremiumOnly, other.PremiumOnly)
+	ss.PremiumOnly = helpers.OverrideWithPointer(ss.PremiumOnly, other.PremiumOnly)
-	ss.StreamOnly = helpers.OverrideWithBool(ss.StreamOnly, other.StreamOnly)
+	ss.StreamOnly = helpers.OverrideWithPointer(ss.StreamOnly, other.StreamOnly)
-	ss.MultiHopOnly = helpers.OverrideWithBool(ss.MultiHopOnly, other.MultiHopOnly)
+	ss.MultiHopOnly = helpers.OverrideWithPointer(ss.MultiHopOnly, other.MultiHopOnly)
 	ss.OpenVPN.overrideWith(other.OpenVPN)
 	ss.Wireguard.overrideWith(other.Wireguard)
 }
@@ -262,11 +262,11 @@ func (ss *ServerSelection) overrideWith(other ServerSelection) {
 func (ss *ServerSelection) setDefaults(vpnProvider string) {
 	ss.VPN = helpers.DefaultString(ss.VPN, vpn.OpenVPN)
 	ss.TargetIP = helpers.DefaultIP(ss.TargetIP, netip.IPv4Unspecified())
-	ss.OwnedOnly = helpers.DefaultBool(ss.OwnedOnly, false)
+	ss.OwnedOnly = helpers.DefaultPointer(ss.OwnedOnly, false)
-	ss.FreeOnly = helpers.DefaultBool(ss.FreeOnly, false)
+	ss.FreeOnly = helpers.DefaultPointer(ss.FreeOnly, false)
-	ss.PremiumOnly = helpers.DefaultBool(ss.PremiumOnly, false)
+	ss.PremiumOnly = helpers.DefaultPointer(ss.PremiumOnly, false)
-	ss.StreamOnly = helpers.DefaultBool(ss.StreamOnly, false)
+	ss.StreamOnly = helpers.DefaultPointer(ss.StreamOnly, false)
-	ss.MultiHopOnly = helpers.DefaultBool(ss.MultiHopOnly, false)
+	ss.MultiHopOnly = helpers.DefaultPointer(ss.MultiHopOnly, false)
 	ss.OpenVPN.setDefaults(vpnProvider)
 	ss.Wireguard.setDefaults()
 }

internal/configuration/settings/shadowsocks.go

@@ -21,7 +21,7 @@ func (s Shadowsocks) validate() (err error) {
 
 func (s *Shadowsocks) copy() (copied Shadowsocks) {
 	return Shadowsocks{
-		Enabled:  helpers.CopyBoolPtr(s.Enabled),
+		Enabled:  helpers.CopyPointer(s.Enabled),
 		Settings: s.Settings.Copy(),
 	}
 }
@@ -29,7 +29,7 @@ func (s *Shadowsocks) copy() (copied Shadowsocks) {
 // mergeWith merges the other settings into any
 // unset field of the receiver settings object.
 func (s *Shadowsocks) mergeWith(other Shadowsocks) {
-	s.Enabled = helpers.MergeWithBool(s.Enabled, other.Enabled)
+	s.Enabled = helpers.MergeWithPointer(s.Enabled, other.Enabled)
 	s.Settings.MergeWith(other.Settings)
 }
 
@@ -37,12 +37,12 @@ func (s *Shadowsocks) mergeWith(other Shadowsocks) {
 // settings object with any field set in the other
 // settings.
 func (s *Shadowsocks) overrideWith(other Shadowsocks) {
-	s.Enabled = helpers.OverrideWithBool(s.Enabled, other.Enabled)
+	s.Enabled = helpers.OverrideWithPointer(s.Enabled, other.Enabled)
 	s.Settings.OverrideWith(other.Settings)
 }
 
 func (s *Shadowsocks) setDefaults() {
-	s.Enabled = helpers.DefaultBool(s.Enabled, false)
+	s.Enabled = helpers.DefaultPointer(s.Enabled, false)
 	s.Settings.SetDefaults()
 }
 

internal/configuration/settings/system.go

@@ -19,28 +19,28 @@ func (s System) validate() (err error) {
 
 func (s *System) copy() (copied System) {
 	return System{
-		PUID:     helpers.CopyUint32Ptr(s.PUID),
+		PUID:     helpers.CopyPointer(s.PUID),
-		PGID:     helpers.CopyUint32Ptr(s.PGID),
+		PGID:     helpers.CopyPointer(s.PGID),
 		Timezone: s.Timezone,
 	}
 }
 
 func (s *System) mergeWith(other System) {
-	s.PUID = helpers.MergeWithUint32(s.PUID, other.PUID)
+	s.PUID = helpers.MergeWithPointer(s.PUID, other.PUID)
-	s.PGID = helpers.MergeWithUint32(s.PGID, other.PGID)
+	s.PGID = helpers.MergeWithPointer(s.PGID, other.PGID)
 	s.Timezone = helpers.MergeWithString(s.Timezone, other.Timezone)
 }
 
 func (s *System) overrideWith(other System) {
-	s.PUID = helpers.OverrideWithUint32(s.PUID, other.PUID)
+	s.PUID = helpers.OverrideWithPointer(s.PUID, other.PUID)
-	s.PGID = helpers.OverrideWithUint32(s.PGID, other.PGID)
+	s.PGID = helpers.OverrideWithPointer(s.PGID, other.PGID)
 	s.Timezone = helpers.OverrideWithString(s.Timezone, other.Timezone)
 }
 
 func (s *System) setDefaults() {
 	const defaultID = 1000
-	s.PUID = helpers.DefaultUint32(s.PUID, defaultID)
+	s.PUID = helpers.DefaultPointer(s.PUID, defaultID)
-	s.PGID = helpers.DefaultUint32(s.PGID, defaultID)
+	s.PGID = helpers.DefaultPointer(s.PGID, defaultID)
 }
 
 func (s System) String() string {

internal/configuration/settings/unbound.go

@@ -30,17 +30,17 @@ func (u *Unbound) setDefaults() {
 		}
 	}
 
-	u.Caching = helpers.DefaultBool(u.Caching, true)
+	u.Caching = helpers.DefaultPointer(u.Caching, true)
-	u.IPv6 = helpers.DefaultBool(u.IPv6, false)
+	u.IPv6 = helpers.DefaultPointer(u.IPv6, false)
 
 	const defaultVerbosityLevel = 1
-	u.VerbosityLevel = helpers.DefaultUint8(u.VerbosityLevel, defaultVerbosityLevel)
+	u.VerbosityLevel = helpers.DefaultPointer(u.VerbosityLevel, defaultVerbosityLevel)
 
 	const defaultVerbosityDetailsLevel = 0
-	u.VerbosityDetailsLevel = helpers.DefaultUint8(u.VerbosityDetailsLevel, defaultVerbosityDetailsLevel)
+	u.VerbosityDetailsLevel = helpers.DefaultPointer(u.VerbosityDetailsLevel, defaultVerbosityDetailsLevel)
 
 	const defaultValidationLogLevel = 0
-	u.ValidationLogLevel = helpers.DefaultUint8(u.ValidationLogLevel, defaultValidationLogLevel)
+	u.ValidationLogLevel = helpers.DefaultPointer(u.ValidationLogLevel, defaultValidationLogLevel)
 
 	if u.Allowed == nil {
 		u.Allowed = []netip.Prefix{
@@ -94,37 +94,37 @@ func (u Unbound) validate() (err error) {
 
 func (u Unbound) copy() (copied Unbound) {
 	return Unbound{
-		Providers:             helpers.CopyStringSlice(u.Providers),
+		Providers:             helpers.CopySlice(u.Providers),
-		Caching:               helpers.CopyBoolPtr(u.Caching),
+		Caching:               helpers.CopyPointer(u.Caching),
-		IPv6:                  helpers.CopyBoolPtr(u.IPv6),
+		IPv6:                  helpers.CopyPointer(u.IPv6),
-		VerbosityLevel:        helpers.CopyUint8Ptr(u.VerbosityLevel),
+		VerbosityLevel:        helpers.CopyPointer(u.VerbosityLevel),
-		VerbosityDetailsLevel: helpers.CopyUint8Ptr(u.VerbosityDetailsLevel),
+		VerbosityDetailsLevel: helpers.CopyPointer(u.VerbosityDetailsLevel),
-		ValidationLogLevel:    helpers.CopyUint8Ptr(u.ValidationLogLevel),
+		ValidationLogLevel:    helpers.CopyPointer(u.ValidationLogLevel),
 		Username:              u.Username,
-		Allowed:               helpers.CopyNetipPrefixesSlice(u.Allowed),
+		Allowed:               helpers.CopySlice(u.Allowed),
 	}
 }
 
 func (u *Unbound) mergeWith(other Unbound) {
-	u.Providers = helpers.MergeStringSlices(u.Providers, other.Providers)
+	u.Providers = helpers.MergeSlices(u.Providers, other.Providers)
-	u.Caching = helpers.MergeWithBool(u.Caching, other.Caching)
+	u.Caching = helpers.MergeWithPointer(u.Caching, other.Caching)
-	u.IPv6 = helpers.MergeWithBool(u.IPv6, other.IPv6)
+	u.IPv6 = helpers.MergeWithPointer(u.IPv6, other.IPv6)
-	u.VerbosityLevel = helpers.MergeWithUint8(u.VerbosityLevel, other.VerbosityLevel)
+	u.VerbosityLevel = helpers.MergeWithPointer(u.VerbosityLevel, other.VerbosityLevel)
-	u.VerbosityDetailsLevel = helpers.MergeWithUint8(u.VerbosityDetailsLevel, other.VerbosityDetailsLevel)
+	u.VerbosityDetailsLevel = helpers.MergeWithPointer(u.VerbosityDetailsLevel, other.VerbosityDetailsLevel)
-	u.ValidationLogLevel = helpers.MergeWithUint8(u.ValidationLogLevel, other.ValidationLogLevel)
+	u.ValidationLogLevel = helpers.MergeWithPointer(u.ValidationLogLevel, other.ValidationLogLevel)
 	u.Username = helpers.MergeWithString(u.Username, other.Username)
-	u.Allowed = helpers.MergeNetipPrefixesSlices(u.Allowed, other.Allowed)
+	u.Allowed = helpers.MergeSlices(u.Allowed, other.Allowed)
 }
 
 func (u *Unbound) overrideWith(other Unbound) {
-	u.Providers = helpers.OverrideWithStringSlice(u.Providers, other.Providers)
+	u.Providers = helpers.OverrideWithSlice(u.Providers, other.Providers)
-	u.Caching = helpers.OverrideWithBool(u.Caching, other.Caching)
+	u.Caching = helpers.OverrideWithPointer(u.Caching, other.Caching)
-	u.IPv6 = helpers.OverrideWithBool(u.IPv6, other.IPv6)
+	u.IPv6 = helpers.OverrideWithPointer(u.IPv6, other.IPv6)
-	u.VerbosityLevel = helpers.OverrideWithUint8(u.VerbosityLevel, other.VerbosityLevel)
+	u.VerbosityLevel = helpers.OverrideWithPointer(u.VerbosityLevel, other.VerbosityLevel)
-	u.VerbosityDetailsLevel = helpers.OverrideWithUint8(u.VerbosityDetailsLevel, other.VerbosityDetailsLevel)
+	u.VerbosityDetailsLevel = helpers.OverrideWithPointer(u.VerbosityDetailsLevel, other.VerbosityDetailsLevel)
-	u.ValidationLogLevel = helpers.OverrideWithUint8(u.ValidationLogLevel, other.ValidationLogLevel)
+	u.ValidationLogLevel = helpers.OverrideWithPointer(u.ValidationLogLevel, other.ValidationLogLevel)
 	u.Username = helpers.OverrideWithString(u.Username, other.Username)
-	u.Allowed = helpers.OverrideWithNetipPrefixesSlice(u.Allowed, other.Allowed)
+	u.Allowed = helpers.OverrideWithSlice(u.Allowed, other.Allowed)
 }
 
 func (u Unbound) ToUnboundFormat() (settings unbound.Settings, err error) {

internal/configuration/settings/updater.go

@@ -63,34 +63,34 @@ func (u Updater) Validate() (err error) {
 
 func (u *Updater) copy() (copied Updater) {
 	return Updater{
-		Period:     helpers.CopyDurationPtr(u.Period),
+		Period:     helpers.CopyPointer(u.Period),
 		DNSAddress: u.DNSAddress,
 		MinRatio:   u.MinRatio,
-		Providers:  helpers.CopyStringSlice(u.Providers),
+		Providers:  helpers.CopySlice(u.Providers),
 	}
 }
 
 // mergeWith merges the other settings into any
 // unset field of the receiver settings object.
 func (u *Updater) mergeWith(other Updater) {
-	u.Period = helpers.MergeWithDurationPtr(u.Period, other.Period)
+	u.Period = helpers.MergeWithPointer(u.Period, other.Period)
 	u.DNSAddress = helpers.MergeWithString(u.DNSAddress, other.DNSAddress)
-	u.MinRatio = helpers.MergeWithFloat64(u.MinRatio, other.MinRatio)
+	u.MinRatio = helpers.MergeWithNumber(u.MinRatio, other.MinRatio)
-	u.Providers = helpers.MergeStringSlices(u.Providers, other.Providers)
+	u.Providers = helpers.MergeSlices(u.Providers, other.Providers)
 }
 
 // overrideWith overrides fields of the receiver
 // settings object with any field set in the other
 // settings.
 func (u *Updater) overrideWith(other Updater) {
-	u.Period = helpers.OverrideWithDurationPtr(u.Period, other.Period)
+	u.Period = helpers.OverrideWithPointer(u.Period, other.Period)
 	u.DNSAddress = helpers.OverrideWithString(u.DNSAddress, other.DNSAddress)
-	u.MinRatio = helpers.OverrideWithFloat64(u.MinRatio, other.MinRatio)
+	u.MinRatio = helpers.OverrideWithNumber(u.MinRatio, other.MinRatio)
-	u.Providers = helpers.OverrideWithStringSlice(u.Providers, other.Providers)
+	u.Providers = helpers.OverrideWithSlice(u.Providers, other.Providers)
 }
 
 func (u *Updater) SetDefaults(vpnProvider string) {
-	u.Period = helpers.DefaultDurationPtr(u.Period, 0)
+	u.Period = helpers.DefaultPointer(u.Period, 0)
 	u.DNSAddress = helpers.DefaultString(u.DNSAddress, "1.1.1.1:53")
 
 	if u.MinRatio == 0 {

internal/configuration/settings/version.go

@@ -19,25 +19,25 @@ func (v Version) validate() (err error) {
 
 func (v *Version) copy() (copied Version) {
 	return Version{
-		Enabled: helpers.CopyBoolPtr(v.Enabled),
+		Enabled: helpers.CopyPointer(v.Enabled),
 	}
 }
 
 // mergeWith merges the other settings into any
 // unset field of the receiver settings object.
 func (v *Version) mergeWith(other Version) {
-	v.Enabled = helpers.MergeWithBool(v.Enabled, other.Enabled)
+	v.Enabled = helpers.MergeWithPointer(v.Enabled, other.Enabled)
 }
 
 // overrideWith overrides fields of the receiver
 // settings object with any field set in the other
 // settings.
 func (v *Version) overrideWith(other Version) {
-	v.Enabled = helpers.OverrideWithBool(v.Enabled, other.Enabled)
+	v.Enabled = helpers.OverrideWithPointer(v.Enabled, other.Enabled)
 }
 
 func (v *Version) setDefaults() {
-	v.Enabled = helpers.DefaultBool(v.Enabled, true)
+	v.Enabled = helpers.DefaultPointer(v.Enabled, true)
 }
 
 func (v Version) String() string {

internal/configuration/settings/wireguard.go

@@ -106,33 +106,33 @@ func (w Wireguard) validate(vpnProvider string, ipv6Supported bool) (err error)
 
 func (w *Wireguard) copy() (copied Wireguard) {
 	return Wireguard{
-		PrivateKey:     helpers.CopyStringPtr(w.PrivateKey),
+		PrivateKey:     helpers.CopyPointer(w.PrivateKey),
-		PreSharedKey:   helpers.CopyStringPtr(w.PreSharedKey),
+		PreSharedKey:   helpers.CopyPointer(w.PreSharedKey),
-		Addresses:      helpers.CopyNetipPrefixesSlice(w.Addresses),
+		Addresses:      helpers.CopySlice(w.Addresses),
 		Interface:      w.Interface,
 		Implementation: w.Implementation,
 	}
 }
 
 func (w *Wireguard) mergeWith(other Wireguard) {
-	w.PrivateKey = helpers.MergeWithStringPtr(w.PrivateKey, other.PrivateKey)
+	w.PrivateKey = helpers.MergeWithPointer(w.PrivateKey, other.PrivateKey)
-	w.PreSharedKey = helpers.MergeWithStringPtr(w.PreSharedKey, other.PreSharedKey)
+	w.PreSharedKey = helpers.MergeWithPointer(w.PreSharedKey, other.PreSharedKey)
-	w.Addresses = helpers.MergeNetipPrefixesSlices(w.Addresses, other.Addresses)
+	w.Addresses = helpers.MergeSlices(w.Addresses, other.Addresses)
 	w.Interface = helpers.MergeWithString(w.Interface, other.Interface)
 	w.Implementation = helpers.MergeWithString(w.Implementation, other.Implementation)
 }
 
 func (w *Wireguard) overrideWith(other Wireguard) {
-	w.PrivateKey = helpers.OverrideWithStringPtr(w.PrivateKey, other.PrivateKey)
+	w.PrivateKey = helpers.OverrideWithPointer(w.PrivateKey, other.PrivateKey)
-	w.PreSharedKey = helpers.OverrideWithStringPtr(w.PreSharedKey, other.PreSharedKey)
+	w.PreSharedKey = helpers.OverrideWithPointer(w.PreSharedKey, other.PreSharedKey)
-	w.Addresses = helpers.OverrideWithNetipPrefixesSlice(w.Addresses, other.Addresses)
+	w.Addresses = helpers.OverrideWithSlice(w.Addresses, other.Addresses)
 	w.Interface = helpers.OverrideWithString(w.Interface, other.Interface)
 	w.Implementation = helpers.OverrideWithString(w.Implementation, other.Implementation)
 }
 
 func (w *Wireguard) setDefaults() {
-	w.PrivateKey = helpers.DefaultStringPtr(w.PrivateKey, "")
+	w.PrivateKey = helpers.DefaultPointer(w.PrivateKey, "")
-	w.PreSharedKey = helpers.DefaultStringPtr(w.PreSharedKey, "")
+	w.PreSharedKey = helpers.DefaultPointer(w.PreSharedKey, "")
 	w.Interface = helpers.DefaultString(w.Interface, "wg0")
 	w.Implementation = helpers.DefaultString(w.Implementation, "auto")
 }

internal/configuration/settings/wireguardselection.go

@@ -110,26 +110,26 @@ func (w WireguardSelection) validate(vpnProvider string) (err error) {
 func (w *WireguardSelection) copy() (copied WireguardSelection) {
 	return WireguardSelection{
 		EndpointIP:   w.EndpointIP,
-		EndpointPort: helpers.CopyUint16Ptr(w.EndpointPort),
+		EndpointPort: helpers.CopyPointer(w.EndpointPort),
 		PublicKey:    w.PublicKey,
 	}
 }
 
 func (w *WireguardSelection) mergeWith(other WireguardSelection) {
 	w.EndpointIP = helpers.MergeWithIP(w.EndpointIP, other.EndpointIP)
-	w.EndpointPort = helpers.MergeWithUint16(w.EndpointPort, other.EndpointPort)
+	w.EndpointPort = helpers.MergeWithPointer(w.EndpointPort, other.EndpointPort)
 	w.PublicKey = helpers.MergeWithString(w.PublicKey, other.PublicKey)
 }
 
 func (w *WireguardSelection) overrideWith(other WireguardSelection) {
 	w.EndpointIP = helpers.OverrideWithIP(w.EndpointIP, other.EndpointIP)
-	w.EndpointPort = helpers.OverrideWithUint16(w.EndpointPort, other.EndpointPort)
+	w.EndpointPort = helpers.OverrideWithPointer(w.EndpointPort, other.EndpointPort)
 	w.PublicKey = helpers.OverrideWithString(w.PublicKey, other.PublicKey)
 }
 
 func (w *WireguardSelection) setDefaults() {
 	w.EndpointIP = helpers.DefaultIP(w.EndpointIP, netip.IPv4Unspecified())
-	w.EndpointPort = helpers.DefaultUint16(w.EndpointPort, 0)
+	w.EndpointPort = helpers.DefaultPointer(w.EndpointPort, 0)
 }
 
 func (w WireguardSelection) String() string {

internal/httpserver/settings.go

@@ -36,10 +36,10 @@ type Settings struct {
 func (s *Settings) SetDefaults() {
 	s.Address = helpers.DefaultString(s.Address, ":8000")
 	const defaultReadTimeout = 3 * time.Second
-	s.ReadHeaderTimeout = helpers.DefaultDuration(s.ReadHeaderTimeout, defaultReadTimeout)
+	s.ReadHeaderTimeout = helpers.DefaultNumber(s.ReadHeaderTimeout, defaultReadTimeout)
-	s.ReadTimeout = helpers.DefaultDuration(s.ReadTimeout, defaultReadTimeout)
+	s.ReadTimeout = helpers.DefaultNumber(s.ReadTimeout, defaultReadTimeout)
 	const defaultShutdownTimeout = 3 * time.Second
-	s.ShutdownTimeout = helpers.DefaultDuration(s.ShutdownTimeout, defaultShutdownTimeout)
+	s.ShutdownTimeout = helpers.DefaultNumber(s.ShutdownTimeout, defaultShutdownTimeout)
 }
 
 func (s Settings) Copy() Settings {
@@ -59,9 +59,9 @@ func (s *Settings) MergeWith(other Settings) {
 	if s.Logger == nil {
 		s.Logger = other.Logger
 	}
-	s.ReadHeaderTimeout = helpers.MergeWithDuration(s.ReadHeaderTimeout, other.ReadHeaderTimeout)
+	s.ReadHeaderTimeout = helpers.MergeWithNumber(s.ReadHeaderTimeout, other.ReadHeaderTimeout)
-	s.ReadTimeout = helpers.MergeWithDuration(s.ReadTimeout, other.ReadTimeout)
+	s.ReadTimeout = helpers.MergeWithNumber(s.ReadTimeout, other.ReadTimeout)
-	s.ShutdownTimeout = helpers.MergeWithDuration(s.ShutdownTimeout, other.ShutdownTimeout)
+	s.ShutdownTimeout = helpers.MergeWithNumber(s.ShutdownTimeout, other.ShutdownTimeout)
 }
 
 func (s *Settings) OverrideWith(other Settings) {
@@ -70,9 +70,9 @@ func (s *Settings) OverrideWith(other Settings) {
 	if other.Logger != nil {
 		s.Logger = other.Logger
 	}
-	s.ReadHeaderTimeout = helpers.OverrideWithDuration(s.ReadHeaderTimeout, other.ReadHeaderTimeout)
+	s.ReadHeaderTimeout = helpers.OverrideWithNumber(s.ReadHeaderTimeout, other.ReadHeaderTimeout)
-	s.ReadTimeout = helpers.OverrideWithDuration(s.ReadTimeout, other.ReadTimeout)
+	s.ReadTimeout = helpers.OverrideWithNumber(s.ReadTimeout, other.ReadTimeout)
-	s.ShutdownTimeout = helpers.OverrideWithDuration(s.ShutdownTimeout, other.ShutdownTimeout)
+	s.ShutdownTimeout = helpers.OverrideWithNumber(s.ShutdownTimeout, other.ShutdownTimeout)
 }
 
 var (

internal/pprof/settings.go

@@ -27,16 +27,16 @@ type Settings struct {
 }
 
 func (s *Settings) SetDefaults() {
-	s.Enabled = helpers.DefaultBool(s.Enabled, false)
+	s.Enabled = helpers.DefaultPointer(s.Enabled, false)
 	s.HTTPServer.Address = helpers.DefaultString(s.HTTPServer.Address, "localhost:6060")
 	const defaultReadTimeout = 5 * time.Minute // for CPU profiling
-	s.HTTPServer.ReadTimeout = helpers.DefaultDuration(s.HTTPServer.ReadTimeout, defaultReadTimeout)
+	s.HTTPServer.ReadTimeout = helpers.DefaultNumber(s.HTTPServer.ReadTimeout, defaultReadTimeout)
 	s.HTTPServer.SetDefaults()
 }
 
 func (s Settings) Copy() (copied Settings) {
 	return Settings{
-		Enabled:          helpers.CopyBoolPtr(s.Enabled),
+		Enabled:          helpers.CopyPointer(s.Enabled),
 		BlockProfileRate: s.BlockProfileRate,
 		MutexProfileRate: s.MutexProfileRate,
 		HTTPServer:       s.HTTPServer.Copy(),
@@ -44,16 +44,16 @@ func (s Settings) Copy() (copied Settings) {
 }
 
 func (s *Settings) MergeWith(other Settings) {
-	s.Enabled = helpers.MergeWithBool(s.Enabled, other.Enabled)
+	s.Enabled = helpers.MergeWithPointer(s.Enabled, other.Enabled)
-	s.BlockProfileRate = helpers.MergeWithIntPtr(s.BlockProfileRate, other.BlockProfileRate)
+	s.BlockProfileRate = helpers.MergeWithPointer(s.BlockProfileRate, other.BlockProfileRate)
-	s.MutexProfileRate = helpers.MergeWithIntPtr(s.MutexProfileRate, other.MutexProfileRate)
+	s.MutexProfileRate = helpers.MergeWithPointer(s.MutexProfileRate, other.MutexProfileRate)
 	s.HTTPServer.MergeWith(other.HTTPServer)
 }
 
 func (s *Settings) OverrideWith(other Settings) {
-	s.Enabled = helpers.OverrideWithBool(s.Enabled, other.Enabled)
+	s.Enabled = helpers.OverrideWithPointer(s.Enabled, other.Enabled)
-	s.BlockProfileRate = helpers.OverrideWithIntPtr(s.BlockProfileRate, other.BlockProfileRate)
+	s.BlockProfileRate = helpers.OverrideWithPointer(s.BlockProfileRate, other.BlockProfileRate)
-	s.MutexProfileRate = helpers.OverrideWithIntPtr(s.MutexProfileRate, other.MutexProfileRate)
+	s.MutexProfileRate = helpers.OverrideWithPointer(s.MutexProfileRate, other.MutexProfileRate)
 	s.HTTPServer.OverrideWith(other.HTTPServer)
 }
 

internal/provider/utils/filtering.go

@@ -1,6 +1,7 @@
 package utils
 
 import (
+	"fmt"
 	"strings"
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
@@ -68,7 +69,7 @@ func filterServer(server models.Server,
 		return true
 	}
 
-	if filterByPossibilitiesUint16(server.Number, selection.Numbers) {
+	if filterByPossibilities(server.Number, selection.Numbers) {
 		return true
 	}
 
@@ -85,25 +86,12 @@ func filterServer(server models.Server,
 	return false
 }
 
-func filterByPossibilities(value string, possibilities []string) (filtered bool) {
+func filterByPossibilities[T string | uint16](value T, possibilities []T) (filtered bool) {
 	if len(possibilities) == 0 {
 		return false
 	}
 	for _, possibility := range possibilities {
-		if strings.EqualFold(value, possibility) {
+		if strings.EqualFold(fmt.Sprint(value), fmt.Sprint(possibility)) {
-			return false
-		}
-	}
-	return true
-}
-
-// TODO merge with filterByPossibilities with generics in Go 1.18.
-func filterByPossibilitiesUint16(value uint16, possibilities []uint16) (filtered bool) {
-	if len(possibilities) == 0 {
-		return false
-	}
-	for _, possibility := range possibilities {
-		if value == possibility {
 			return false
 		}
 	}

internal/storage/filter.go

@@ -1,6 +1,7 @@
 package storage
 
 import (
+	"fmt"
 	"strings"
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
@@ -89,7 +90,7 @@ func filterServer(server models.Server,
 		return true
 	}
 
-	if filterByPossibilitiesUint16(server.Number, selection.Numbers) {
+	if filterByPossibilities(server.Number, selection.Numbers) {
 		return true
 	}
 
@@ -106,25 +107,12 @@ func filterServer(server models.Server,
 	return false
 }
 
-func filterByPossibilities(value string, possibilities []string) (filtered bool) {
+func filterByPossibilities[T string | uint16](value T, possibilities []T) (filtered bool) {
 	if len(possibilities) == 0 {
 		return false
 	}
 	for _, possibility := range possibilities {
-		if strings.EqualFold(value, possibility) {
+		if strings.EqualFold(fmt.Sprint(value), fmt.Sprint(possibility)) {
-			return false
-		}
-	}
-	return true
-}
-
-// TODO merge with filterByPossibilities with generics in Go 1.18.
-func filterByPossibilitiesUint16(value uint16, possibilities []uint16) (filtered bool) {
-	if len(possibilities) == 0 {
-		return false
-	}
-	for _, possibility := range possibilities {
-		if value == possibility {
 			return false
 		}
 	}