1 package netlink
2
3 import (
4 "fmt"
5 "syscall"
6
7 "github.com/vishvananda/netlink/nl"
8 "golang.org/x/sys/unix"
9 )
10
11 func LinkGetProtinfo(link Link) (Protinfo, error) {
12 return pkgHandle.LinkGetProtinfo(link)
13 }
14
15 func (h *Handle) LinkGetProtinfo(link Link) (Protinfo, error) {
16 base := link.Attrs()
17 h.ensureIndex(base)
18 var pi Protinfo
19 req := h.newNetlinkRequest(unix.RTM_GETLINK, unix.NLM_F_DUMP)
20 msg := nl.NewIfInfomsg(unix.AF_BRIDGE)
21 req.AddData(msg)
22 msgs, err := req.Execute(unix.NETLINK_ROUTE, 0)
23 if err != nil {
24 return pi, err
25 }
26
27 for _, m := range msgs {
28 ans := nl.DeserializeIfInfomsg(m)
29 if int(ans.Index) != base.Index {
30 continue
31 }
32 attrs, err := nl.ParseRouteAttr(m[ans.Len():])
33 if err != nil {
34 return pi, err
35 }
36 for _, attr := range attrs {
37 if attr.Attr.Type != unix.IFLA_PROTINFO|unix.NLA_F_NESTED {
38 continue
39 }
40 infos, err := nl.ParseRouteAttr(attr.Value)
41 if err != nil {
42 return pi, err
43 }
44 pi = parseProtinfo(infos)
45
46 return pi, nil
47 }
48 }
49 return pi, fmt.Errorf("Device with index %d not found", base.Index)
50 }
51
52 func parseProtinfo(infos []syscall.NetlinkRouteAttr) (pi Protinfo) {
53 for _, info := range infos {
54 switch info.Attr.Type {
55 case nl.IFLA_BRPORT_MODE:
56 pi.Hairpin = byteToBool(info.Value[0])
57 case nl.IFLA_BRPORT_GUARD:
58 pi.Guard = byteToBool(info.Value[0])
59 case nl.IFLA_BRPORT_FAST_LEAVE:
60 pi.FastLeave = byteToBool(info.Value[0])
61 case nl.IFLA_BRPORT_PROTECT:
62 pi.RootBlock = byteToBool(info.Value[0])
63 case nl.IFLA_BRPORT_LEARNING:
64 pi.Learning = byteToBool(info.Value[0])
65 case nl.IFLA_BRPORT_UNICAST_FLOOD:
66 pi.Flood = byteToBool(info.Value[0])
67 case nl.IFLA_BRPORT_PROXYARP:
68 pi.ProxyArp = byteToBool(info.Value[0])
69 case nl.IFLA_BRPORT_PROXYARP_WIFI:
70 pi.ProxyArpWiFi = byteToBool(info.Value[0])
71 case nl.IFLA_BRPORT_ISOLATED:
72 pi.Isolated = byteToBool(info.Value[0])
73 case nl.IFLA_BRPORT_NEIGH_SUPPRESS:
74 pi.NeighSuppress = byteToBool(info.Value[0])
75 }
76 }
77 return
78 }
79
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