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package ip
import (
"fmt"
"net"
"strconv"
"strings"
"github.com/vishvananda/netlink"
"golang.org/x/sys/unix"
)
// Family can be { FamilyAll, FamilyV4, FamilyV6 }.
type Family int
const (
// FamilyAll specifies any/all family.
FamilyAll Family = unix.AF_UNSPEC
// FamilyV4 specifies the IPv4 family.
FamilyV4 Family = unix.AF_INET
// FamilyV6 specifies the IPv6 family.
FamilyV6 Family = unix.AF_INET6
)
func linkByName(name string) (netlink.Link, error) {
link, err := netlink.LinkByName(name)
if err != nil {
return nil, fmt.Errorf("Failed to get link %q: %w", name, err)
}
return link, nil
}
func parseHandle(id string) (uint32, error) {
if id == "root" {
return netlink.HANDLE_ROOT, nil
}
majorStr, minorStr, found := strings.Cut(id, ":")
if !found {
return 0, fmt.Errorf("Invalid handle %q", id)
}
major, err := strconv.ParseUint(majorStr, 16, 16)
if err != nil {
return 0, fmt.Errorf("Invalid handle %q: %w", id, err)
}
minor, err := strconv.ParseUint(minorStr, 16, 16)
if err != nil {
return 0, fmt.Errorf("Invalid handle %q: %w", id, err)
}
return netlink.MakeHandle(uint16(major), uint16(minor)), nil
}
// ParseIPNet parses a CIDR string and returns a *net.IPNet containing both the full address and the netmask,
// Unlike net.ParseCIDR which zeroes out the host part in the returned *net.IPNet and returns the full address separately.
func ParseIPNet(addr string) (*net.IPNet, error) {
return netlink.ParseIPNet(addr)
}
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