func()

in google_guest_agent/network/manager/systemd_networkd_linux.go [508:558]

• 43 lines of code
• 7 McCabe index (conditional complexity)

func (n *systemdNetworkd) writeEthernetConfig(interfaces, ipv6Interfaces []string) error {
	for i, iface := range interfaces {
		if !shouldManageInterface(i == 0) {
			logger.Debugf("ManagePrimaryNIC is disabled, skipping systemdNetworkd writeEthernetConfig for %s", iface)
			continue
		}
		if isInvalid(iface) {
			continue
		}
		logger.Debugf("write systemd-networkd network config for %s", iface)

		var dhcp = "ipv4"
		if slices.Contains(ipv6Interfaces, iface) {
			dhcp = "yes"
		}

		// Create and setup ini file.
		data := systemdConfig{
			GuestAgent: guestAgentSection{
				ManagedByGuestAgent: true,
			},
			Match: systemdMatchConfig{
				Name: iface,
			},
			Network: systemdNetworkConfig{
				DHCP:            dhcp,
				DNSDefaultRoute: true,
			},
		}

		// We are only interested on DHCP offered routes on the primary nic,
		// ignore it for the secondary ones.
		if i != 0 {
			data.Network.DNSDefaultRoute = false
			data.DHCPv4 = &systemdDHCPConfig{
				RoutesToDNS: false,
				RoutesToNTP: false,
			}
			data.DHCPv6 = &systemdDHCPConfig{
				RoutesToDNS: false,
				RoutesToNTP: false,
			}
		}

		if err := data.write(n, iface); err != nil {
			return fmt.Errorf("failed to write systemd's ethernet interface config: %+v", err)
		}
	}

	return nil
}