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added encapsulation attributes to Iptun

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added encapsulation attributes to Gretun
implemented Sittun struct for supporting SIT tunnels
This commit is contained in:
Reinier Schoof
2017-09-27 09:40:44 +02:00
committed by Vish (Ishaya) Abrams
parent 12728257a9
commit c29ba20204
4 changed files with 161 additions and 17 deletions
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90
link_linux.go
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@@ -945,6 +945,8 @@ func (h *Handle) linkModify(link Link, flags int) error {
addGretapAttrs(link, linkInfo)
case *Iptun:
addIptunAttrs(link, linkInfo)
case *Sittun:
addSittunAttrs(link, linkInfo)
case *Gretun:
addGretunAttrs(link, linkInfo)
case *Vti:
@@ -1184,6 +1186,8 @@ func LinkDeserialize(hdr *unix.NlMsghdr, m []byte) (Link, error) {
link = &Gretap{}
case "ipip":
link = &Iptun{}
case "sit":
link = &Sittun{}
case "gre":
link = &Gretun{}
case "vti":
@@ -1217,6 +1221,8 @@ func LinkDeserialize(hdr *unix.NlMsghdr, m []byte) (Link, error) {
parseGretapData(link, data)
case "ipip":
parseIptunData(link, data)
case "sit":
parseSittunData(link, data)
case "gre":
parseGretunData(link, data)
case "vti":
@@ -1810,6 +1816,10 @@ func addGretunAttrs(gre *Gretun, linkInfo *nl.RtAttr) {
nl.NewRtAttrChild(data, nl.IFLA_GRE_PMTUDISC, nl.Uint8Attr(gre.PMtuDisc))
nl.NewRtAttrChild(data, nl.IFLA_GRE_TTL, nl.Uint8Attr(gre.Ttl))
nl.NewRtAttrChild(data, nl.IFLA_GRE_TOS, nl.Uint8Attr(gre.Tos))
nl.NewRtAttrChild(data, nl.IFLA_GRE_ENCAP_TYPE, nl.Uint16Attr(gre.EncapType))
nl.NewRtAttrChild(data, nl.IFLA_GRE_ENCAP_FLAGS, nl.Uint16Attr(gre.EncapFlags))
nl.NewRtAttrChild(data, nl.IFLA_GRE_ENCAP_SPORT, htons(gre.EncapSport))
nl.NewRtAttrChild(data, nl.IFLA_GRE_ENCAP_DPORT, htons(gre.EncapDport))
}
func parseGretunData(link Link, data []syscall.NetlinkRouteAttr) {
@@ -1835,6 +1845,14 @@ func parseGretunData(link Link, data []syscall.NetlinkRouteAttr) {
gre.Tos = uint8(datum.Value[0])
case nl.IFLA_GRE_PMTUDISC:
gre.PMtuDisc = uint8(datum.Value[0])
case nl.IFLA_GRE_ENCAP_TYPE:
gre.EncapType = native.Uint16(datum.Value[0:2])
case nl.IFLA_GRE_ENCAP_FLAGS:
gre.EncapFlags = native.Uint16(datum.Value[0:2])
case nl.IFLA_GRE_ENCAP_SPORT:
gre.EncapSport = ntohs(datum.Value[0:2])
case nl.IFLA_GRE_ENCAP_DPORT:
gre.EncapDport = ntohs(datum.Value[0:2])
}
}
}
@@ -1881,6 +1899,12 @@ func parseLinkXdp(data []byte) (*LinkXdp, error) {
}
func addIptunAttrs(iptun *Iptun, linkInfo *nl.RtAttr) {
if iptun.FlowBased {
// In flow based mode, no other attributes need to be configured
nl.NewRtAttrChild(linkInfo, nl.IFLA_IPTUN_COLLECT_METADATA, boolAttr(iptun.FlowBased))
return
}
data := nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_DATA, nil)
ip := iptun.Local.To4()
@@ -1899,6 +1923,10 @@ func addIptunAttrs(iptun *Iptun, linkInfo *nl.RtAttr) {
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_PMTUDISC, nl.Uint8Attr(iptun.PMtuDisc))
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_TTL, nl.Uint8Attr(iptun.Ttl))
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_TOS, nl.Uint8Attr(iptun.Tos))
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_ENCAP_TYPE, nl.Uint16Attr(iptun.EncapType))
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_ENCAP_FLAGS, nl.Uint16Attr(iptun.EncapFlags))
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_ENCAP_SPORT, htons(iptun.EncapSport))
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_ENCAP_DPORT, htons(iptun.EncapDport))
}
func parseIptunData(link Link, data []syscall.NetlinkRouteAttr) {
@@ -1915,6 +1943,68 @@ func parseIptunData(link Link, data []syscall.NetlinkRouteAttr) {
iptun.Tos = uint8(datum.Value[0])
case nl.IFLA_IPTUN_PMTUDISC:
iptun.PMtuDisc = uint8(datum.Value[0])
case nl.IFLA_IPTUN_ENCAP_SPORT:
iptun.EncapSport = ntohs(datum.Value[0:2])
case nl.IFLA_IPTUN_ENCAP_DPORT:
iptun.EncapDport = ntohs(datum.Value[0:2])
case nl.IFLA_IPTUN_ENCAP_TYPE:
iptun.EncapType = native.Uint16(datum.Value[0:2])
case nl.IFLA_IPTUN_ENCAP_FLAGS:
iptun.EncapFlags = native.Uint16(datum.Value[0:2])
case nl.IFLA_IPTUN_COLLECT_METADATA:
iptun.FlowBased = int8(datum.Value[0]) != 0
}
}
}
func addSittunAttrs(sittun *Sittun, linkInfo *nl.RtAttr) {
data := nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_DATA, nil)
if sittun.Link != 0 {
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_LINK, nl.Uint32Attr(sittun.Link))
}
ip := sittun.Local.To4()
if ip != nil {
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_LOCAL, []byte(ip))
}
ip = sittun.Remote.To4()
if ip != nil {
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_REMOTE, []byte(ip))
}
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_TTL, nl.Uint8Attr(sittun.Ttl))
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_TOS, nl.Uint8Attr(sittun.Tos))
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_PMTUDISC, nl.Uint8Attr(sittun.PMtuDisc))
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_ENCAP_TYPE, nl.Uint16Attr(sittun.EncapType))
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_ENCAP_FLAGS, nl.Uint16Attr(sittun.EncapFlags))
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_ENCAP_SPORT, htons(sittun.EncapSport))
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_ENCAP_DPORT, htons(sittun.EncapDport))
}
func parseSittunData(link Link, data []syscall.NetlinkRouteAttr) {
sittun := link.(*Sittun)
for _, datum := range data {
switch datum.Attr.Type {
case nl.IFLA_IPTUN_LOCAL:
sittun.Local = net.IP(datum.Value[0:4])
case nl.IFLA_IPTUN_REMOTE:
sittun.Remote = net.IP(datum.Value[0:4])
case nl.IFLA_IPTUN_TTL:
sittun.Ttl = uint8(datum.Value[0])
case nl.IFLA_IPTUN_TOS:
sittun.Tos = uint8(datum.Value[0])
case nl.IFLA_IPTUN_PMTUDISC:
sittun.PMtuDisc = uint8(datum.Value[0])
case nl.IFLA_IPTUN_ENCAP_TYPE:
sittun.EncapType = native.Uint16(datum.Value[0:2])
case nl.IFLA_IPTUN_ENCAP_FLAGS:
sittun.EncapFlags = native.Uint16(datum.Value[0:2])
case nl.IFLA_IPTUN_ENCAP_SPORT:
sittun.EncapSport = ntohs(datum.Value[0:2])
case nl.IFLA_IPTUN_ENCAP_DPORT:
sittun.EncapDport = ntohs(datum.Value[0:2])
}
}
}