78 lines
1.6 KiB
Go
78 lines
1.6 KiB
Go
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package netlink
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import (
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"fmt"
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"net"
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"syscall"
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)
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// Scope is an enum representing a route scope.
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type Scope uint8
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const (
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SCOPE_UNIVERSE Scope = syscall.RT_SCOPE_UNIVERSE
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SCOPE_SITE Scope = syscall.RT_SCOPE_SITE
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SCOPE_LINK Scope = syscall.RT_SCOPE_LINK
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SCOPE_HOST Scope = syscall.RT_SCOPE_HOST
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SCOPE_NOWHERE Scope = syscall.RT_SCOPE_NOWHERE
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)
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type NextHopFlag int
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const (
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FLAG_ONLINK NextHopFlag = syscall.RTNH_F_ONLINK
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FLAG_PERVASIVE NextHopFlag = syscall.RTNH_F_PERVASIVE
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)
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// Route represents a netlink route. A route is associated with a link,
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// has a destination network, an optional source ip, and optional
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// gateway. Advanced route parameters and non-main routing tables are
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// currently not supported.
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type Route struct {
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LinkIndex int
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Scope Scope
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Dst *net.IPNet
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Src net.IP
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Gw net.IP
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Flags int
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}
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func (r Route) String() string {
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return fmt.Sprintf("{Ifindex: %d Dst: %s Src: %s Gw: %s Flags: %s}", r.LinkIndex, r.Dst,
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r.Src, r.Gw, r.ListFlags())
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}
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func (r *Route) SetFlag(flag NextHopFlag) {
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r.Flags |= int(flag)
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}
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func (r *Route) ClearFlag(flag NextHopFlag) {
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r.Flags &^= int(flag)
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}
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type flagString struct {
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f NextHopFlag
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s string
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}
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var testFlags = []flagString{
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flagString{f: FLAG_ONLINK, s: "onlink"},
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flagString{f: FLAG_PERVASIVE, s: "pervasive"},
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}
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func (r *Route) ListFlags() []string {
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var flags []string
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for _, tf := range testFlags {
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if r.Flags&int(tf.f) != 0 {
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flags = append(flags, tf.s)
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}
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}
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return flags
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}
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// RouteUpdate is sent when a route changes - type is RTM_NEWROUTE or RTM_DELROUTE
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type RouteUpdate struct {
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Type uint16
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Route
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}
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