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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
Equal(Destination) bool
}
type Encap interface {
Type() int
Decode([]byte) error
Encode() ([]byte, error)
String() string
Equal(Encap) bool
}
// 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
MTU int
Window int
Rtt int
RttVar int
Ssthresh int
Cwnd int
AdvMSS int
Reordering int
Hoplimit int
InitCwnd int
Features int
RtoMin int
InitRwnd int
QuickACK int
Congctl string
FastOpenNoCookie int
}
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) Equal(x Route) bool {
return r.LinkIndex == x.LinkIndex &&
r.ILinkIndex == x.ILinkIndex &&
r.Scope == x.Scope &&
ipNetEqual(r.Dst, x.Dst) &&
r.Src.Equal(x.Src) &&
r.Gw.Equal(x.Gw) &&
nexthopInfoSlice(r.MultiPath).Equal(x.MultiPath) &&
r.Protocol == x.Protocol &&
r.Priority == x.Priority &&
r.Table == x.Table &&
r.Type == x.Type &&
r.Tos == x.Tos &&
r.Hoplimit == x.Hoplimit &&
r.Flags == x.Flags &&
(r.MPLSDst == x.MPLSDst || (r.MPLSDst != nil && x.MPLSDst != nil && *r.MPLSDst == *x.MPLSDst)) &&
(r.NewDst == x.NewDst || (r.NewDst != nil && r.NewDst.Equal(x.NewDst))) &&
(r.Encap == x.Encap || (r.Encap != nil && r.Encap.Equal(x.Encap)))
}
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: %s", n.Gw))
elems = append(elems, fmt.Sprintf("Flags: %s", n.ListFlags()))
return fmt.Sprintf("{%s}", strings.Join(elems, " "))
}
func (n NexthopInfo) Equal(x NexthopInfo) bool {
return n.LinkIndex == x.LinkIndex &&
n.Hops == x.Hops &&
n.Gw.Equal(x.Gw) &&
n.Flags == x.Flags &&
(n.NewDst == x.NewDst || (n.NewDst != nil && n.NewDst.Equal(x.NewDst))) &&
(n.Encap == x.Encap || (n.Encap != nil && n.Encap.Equal(x.Encap)))
}
type nexthopInfoSlice []*NexthopInfo
func (n nexthopInfoSlice) Equal(x []*NexthopInfo) bool {
if len(n) != len(x) {
return false
}
for i := range n {
if n[i] == nil || x[i] == nil {
return false
}
if !n[i].Equal(*x[i]) {
return false
}
}
return true
}
// ipNetEqual returns true iff both IPNet are equal
func ipNetEqual(ipn1 *net.IPNet, ipn2 *net.IPNet) bool {
if ipn1 == ipn2 {
return true
}
if ipn1 == nil || ipn2 == nil {
return false
}
m1, _ := ipn1.Mask.Size()
m2, _ := ipn2.Mask.Size()
return m1 == m2 && ipn1.IP.Equal(ipn2.IP)
}
|
