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Add support for the expires option of ip route

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This commit is contained in:
Albert Jin
2025-05-10 17:00:23 +08:00
committed by Alessandro Boch
parent cf66e1d224
commit b032ea08ec
3 changed files with 67 additions and 1 deletions
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31
route_linux.go
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@@ -1086,6 +1086,12 @@ func (h *Handle) prepareRouteReq(route *Route, req *nl.NetlinkRequest, msg *nl.R
msg.Type = uint8(route.Type)
}
if route.Expires > 0 {
b := make([]byte, 4)
native.PutUint32(b, uint32(route.Expires))
rtAttrs = append(rtAttrs, nl.NewRtAttr(unix.RTA_EXPIRES, b))
}
var metrics []*nl.RtAttr
if route.MTU > 0 {
b := nl.Uint32Attr(uint32(route.MTU))
@@ -1320,6 +1326,25 @@ func (h *Handle) RouteListFilteredIter(family int, filter *Route, filterMask uin
return executeErr
}
// deserializeRouteCacheInfo decodes a RTA_CACHEINFO attribute into a RouteCacheInfo struct
func deserializeRouteCacheInfo(b []byte) (*RouteCacheInfo, error) {
if len(b) != 32 {
return nil, unix.EINVAL
}
e := nl.NativeEndian()
return &RouteCacheInfo{
e.Uint32(b),
e.Uint32(b[4:]),
int32(e.Uint32(b[8:])),
e.Uint32(b[12:]),
e.Uint32(b[16:]),
e.Uint32(b[20:]),
e.Uint32(b[24:]),
e.Uint32(b[28:]),
}, nil
}
// deserializeRoute decodes a binary netlink message into a Route struct
func deserializeRoute(m []byte) (Route, error) {
msg := nl.DeserializeRtMsg(m)
@@ -1363,6 +1388,12 @@ func deserializeRoute(m []byte) (Route, error) {
route.ILinkIndex = int(native.Uint32(attr.Value[0:4]))
case unix.RTA_PRIORITY:
route.Priority = int(native.Uint32(attr.Value[0:4]))
case unix.RTA_CACHEINFO:
route.CacheInfo, err = deserializeRouteCacheInfo(attr.Value)
if err != nil {
return route, err
}
route.Expires = int(route.CacheInfo.Expires) / 100
case unix.RTA_FLOW:
route.Realm = int(native.Uint32(attr.Value[0:4]))
case unix.RTA_TABLE: