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setup_verify.go
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setup_verify.go
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package bridge
import (
"github.com/vishvananda/netlink"
)
func setupVerifyAndReconcile(config *networkConfiguration, i *bridgeInterface) error {
// Fetch a single IPv4 and a slice of IPv6 addresses from the bridge.
addrv4, addrsv6, err := i.addresses()
if err != nil {
return err
}
// Verify that the bridge does have an IPv4 address.
if addrv4.IPNet == nil {
return &ErrNoIPAddr{}
}
// Verify that the bridge IPv4 address matches the requested configuration.
if config.AddressIPv4 != nil && !addrv4.IP.Equal(config.AddressIPv4.IP) {
return &IPv4AddrNoMatchError{IP: addrv4.IP, CfgIP: config.AddressIPv4.IP}
}
// Verify that one of the bridge IPv6 addresses matches the requested
// configuration.
if config.EnableIPv6 && !findIPv6Address(netlink.Addr{IPNet: bridgeIPv6}, addrsv6) {
return (*IPv6AddrNoMatchError)(bridgeIPv6)
}
// By this time we have either configured a new bridge with an IP address
// or made sure an existing bridge's IP matches the configuration
// Now is the time to cache these states in the bridgeInterface.
i.bridgeIPv4 = addrv4.IPNet
i.bridgeIPv6 = bridgeIPv6
return nil
}
func findIPv6Address(addr netlink.Addr, addresses []netlink.Addr) bool {
for _, addrv6 := range addresses {
if addrv6.String() == addr.String() {
return true
}
}
return false
}