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package netlink
import (
"fmt"
"net"
"strings"
)
// Scope is an enum representing a route scope.
type Scope uint8
type NextHopFlag int
type Destination interface {
Family() int
Decode([]byte) error
Encode() ([]byte, error)
String() string
}
type Encap interface {
Type() int
Decode([]byte) error
Encode() ([]byte, error)
String() string
}
// Route represents a netlink route.
type Route struct {
LinkIndex int
ILinkIndex int
Scope Scope
Dst *net.IPNet
Src net.IP
Gw net.IP
MultiPath []*NexthopInfo
Protocol int
Priority int
Table int
Type int
Tos int
Flags int
MPLSDst *int
NewDst Destination
Encap Encap
}
func (r Route) String() string {
elems := []string{}
if len(r.MultiPath) == 0 {
elems = append(elems, fmt.Sprintf("Ifindex: %d", r.LinkIndex))
}
if r.MPLSDst != nil {
elems = append(elems, fmt.Sprintf("Dst: %d", r.MPLSDst))
} else {
elems = append(elems, fmt.Sprintf("Dst: %s", r.Dst))
}
if r.NewDst != nil {
elems = append(elems, fmt.Sprintf("NewDst: %s", r.NewDst))
}
if r.Encap != nil {
elems = append(elems, fmt.Sprintf("Encap: %s", r.Encap))
}
elems = append(elems, fmt.Sprintf("Src: %s", r.Src))
if len(r.MultiPath) > 0 {
elems = append(elems, fmt.Sprintf("Gw: %s", r.MultiPath))
} else {
elems = append(elems, fmt.Sprintf("Gw: %s", r.Gw))
}
elems = append(elems, fmt.Sprintf("Flags: %s", r.ListFlags()))
elems = append(elems, fmt.Sprintf("Table: %d", r.Table))
return fmt.Sprintf("{%s}", strings.Join(elems, " "))
}
func (r *Route) SetFlag(flag NextHopFlag) {
r.Flags |= int(flag)
}
func (r *Route) ClearFlag(flag NextHopFlag) {
r.Flags &^= int(flag)
}
type flagString struct {
f NextHopFlag
s string
}
// RouteUpdate is sent when a route changes - type is RTM_NEWROUTE or RTM_DELROUTE
type RouteUpdate struct {
Type uint16
Route
}
type NexthopInfo struct {
LinkIndex int
Hops int
Gw net.IP
Flags int
NewDst Destination
Encap Encap
}
func (n *NexthopInfo) String() string {
elems := []string{}
elems = append(elems, fmt.Sprintf("Ifindex: %d", n.LinkIndex))
if n.NewDst != nil {
elems = append(elems, fmt.Sprintf("NewDst: %s", n.NewDst))
}
if n.Encap != nil {
elems = append(elems, fmt.Sprintf("Encap: %s", n.Encap))
}
elems = append(elems, fmt.Sprintf("Weight: %d", n.Hops+1))
elems = append(elems, fmt.Sprintf("Gw: %d", n.Gw))
elems = append(elems, fmt.Sprintf("Flags: %s", n.ListFlags()))
return fmt.Sprintf("{%s}", strings.Join(elems, " "))
}
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