mirror of
https://github.com/qdm12/gluetun.git
synced 2026-05-07 12:30:11 +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
49 lines
1.2 KiB
Go
49 lines
1.2 KiB
Go
package routing
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import (
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"fmt"
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"net"
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"net/netip"
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"github.com/qdm12/gluetun/internal/netlink"
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)
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func ipIsPrivate(ip netip.Addr) bool {
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return ip.IsPrivate() || ip.IsLoopback() ||
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ip.IsLinkLocalUnicast() || ip.IsLinkLocalMulticast()
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}
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func ipMatchesFamily(ip netip.Addr, family uint8) bool {
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return (family == netlink.FamilyV4 && ip.Is4()) ||
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(family == netlink.FamilyV6 && ip.Is6())
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}
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func (r *Routing) AssignedIP(interfaceName string, family uint8) (ip netip.Addr, err error) {
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iface, err := net.InterfaceByName(interfaceName)
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if err != nil {
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return ip, fmt.Errorf("network interface %s not found: %w", interfaceName, err)
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}
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addresses, err := iface.Addrs()
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if err != nil {
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return ip, fmt.Errorf("listing interface %s addresses: %w", interfaceName, err)
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}
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for _, address := range addresses {
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switch value := address.(type) {
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case *net.IPAddr:
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ip = netIPToNetipAddress(value.IP)
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case *net.IPNet:
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ip = netIPToNetipAddress(value.IP)
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default:
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continue
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}
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if !ipMatchesFamily(ip, family) {
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continue
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}
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return ip, nil
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}
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return ip, fmt.Errorf("IP address not found for interface: interface %s in %d addresses",
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interfaceName, len(addresses))
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}
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