mirror of
https://github.com/k3s-io/kubernetes.git
synced 2025-11-04 07:49:35 +00:00
41 lines
1.3 KiB
Go
41 lines
1.3 KiB
Go
// Package netlink provides a simple library for netlink. Netlink is
|
|
// the interface a user-space program in linux uses to communicate with
|
|
// the kernel. It can be used to add and remove interfaces, set up ip
|
|
// addresses and routes, and confiugre ipsec. Netlink communication
|
|
// requires elevated privileges, so in most cases this code needs to
|
|
// be run as root. The low level primitives for netlink are contained
|
|
// in the nl subpackage. This package attempts to provide a high-level
|
|
// interface that is loosly modeled on the iproute2 cli.
|
|
package netlink
|
|
|
|
import (
|
|
"errors"
|
|
"net"
|
|
)
|
|
|
|
var (
|
|
// ErrNotImplemented is returned when a requested feature is not implemented.
|
|
ErrNotImplemented = errors.New("not implemented")
|
|
)
|
|
|
|
// ParseIPNet parses a string in ip/net format and returns a net.IPNet.
|
|
// This is valuable because addresses in netlink are often IPNets and
|
|
// ParseCIDR returns an IPNet with the IP part set to the base IP of the
|
|
// range.
|
|
func ParseIPNet(s string) (*net.IPNet, error) {
|
|
ip, ipNet, err := net.ParseCIDR(s)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
ipNet.IP = ip
|
|
return ipNet, nil
|
|
}
|
|
|
|
// NewIPNet generates an IPNet from an ip address using a netmask of 32 or 128.
|
|
func NewIPNet(ip net.IP) *net.IPNet {
|
|
if ip.To4() != nil {
|
|
return &net.IPNet{IP: ip, Mask: net.CIDRMask(32, 32)}
|
|
}
|
|
return &net.IPNet{IP: ip, Mask: net.CIDRMask(128, 128)}
|
|
}
|