func ParseEvpnMacAdvArgs(args []string) (bgp.AddrPrefixInterface, []string, error) {
if len(args) < 4 {
return nil, nil, fmt.Errorf("lack of number of args needs 4 but %d", len(args))
}
var nlri bgp.AddrPrefixInterface
var ip net.IP
iplen := 0
mac, err := net.ParseMAC(args[0])
if err != nil {
return nil, nil, fmt.Errorf("invalid mac: %s", args[0])
}
if args[1] != "0.0.0.0" && args[1] != "::" {
ip = net.ParseIP(args[1])
if ip == nil {
return nil, nil, fmt.Errorf("invalid ip prefix: %s", args[1])
}
iplen = net.IPv4len * 8
if ip.To4() == nil {
iplen = net.IPv6len * 8
}
}
eTag, err := strconv.Atoi(args[2])
if err != nil {
return nil, nil, fmt.Errorf("invalid eTag: %s. err: %s", args[2], err)
}
label, err := strconv.Atoi(args[3])
if err != nil {
return nil, nil, fmt.Errorf("invalid label: %s. err: %s", args[3], err)
}
var rd bgp.RouteDistinguisherInterface
if args[4] == "rd" && len(args) > 5 {
rd, err = bgp.ParseRouteDistinguisher(args[5])
if err != nil {
return nil, nil, err
}
}
macIpAdv := &bgp.EVPNMacIPAdvertisementRoute{
RD: rd,
ESI: bgp.EthernetSegmentIdentifier{
Type: bgp.ESI_ARBITRARY,
},
MacAddressLength: 48,
MacAddress: mac,
IPAddressLength: uint8(iplen),
IPAddress: ip,
Labels: []uint32{uint32(label)},
ETag: uint32(eTag),
}
nlri = bgp.NewEVPNNLRI(bgp.EVPN_ROUTE_TYPE_MAC_IP_ADVERTISEMENT, 0, macIpAdv)
extcomms := args[6:]
return nlri, extcomms, nil
}
func ParseEVPNIPPrefixArgs(args []string) (bgp.AddrPrefixInterface, []string, error) {
if len(args) < 6 {
return nil, nil, fmt.Errorf("lack of number of args needs 6 at least but got %d", len(args))
}
m := extractReserved(args, []string{"gw", "rd", "rt", "encap", "etag", "label"})
if len(m[""]) < 1 {
return nil, nil, fmt.Errorf("specify prefix")
}
ip, n, err := net.ParseCIDR(m[""][0])
if err != nil {
return nil, nil, err
}
ones, _ := n.Mask.Size()
var gw net.IP
if len(m["gw"]) > 0 {
gw = net.ParseIP(m["gw"][0])
}
if len(m["rd"]) < 1 {
return nil, nil, fmt.Errorf("specify RD")
}
rd, err := bgp.ParseRouteDistinguisher(m["rd"][0])
if err != nil {
return nil, nil, err
}
var etag uint32
if len(m["etag"]) > 0 {
e, err := strconv.Atoi(m["etag"][0])
if err != nil {
return nil, nil, err
}
etag = uint32(e)
}
var label uint32
if len(m["label"]) > 0 {
e, err := strconv.Atoi(m["label"][0])
if err != nil {
return nil, nil, err
}
label = uint32(e)
}
r := &bgp.EVPNIPPrefixRoute{
RD: rd,
ETag: etag,
IPPrefixLength: uint8(ones),
IPPrefix: ip,
GWIPAddress: gw,
Label: label,
}
return bgp.NewEVPNNLRI(bgp.EVPN_IP_PREFIX, 0, r), nil, nil
}
func modVrf(typ string, args []string) error {
var err error
switch typ {
case CMD_ADD:
a := extractReserved(args, []string{"rd", "rt", "id"})
if len(a[""]) != 1 || len(a["rd"]) != 1 || len(a["rt"]) < 2 || len(a["id"]) > 1 {
return fmt.Errorf("Usage: gobgp vrf add <vrf name> [ id <id> ] rd <rd> rt { import | export | both } <rt>...")
}
name := a[""][0]
rd, err := bgp.ParseRouteDistinguisher(a["rd"][0])
if err != nil {
return err
}
cur := ""
importRt := make([]bgp.ExtendedCommunityInterface, 0)
exportRt := make([]bgp.ExtendedCommunityInterface, 0)
for _, elem := range a["rt"] {
if elem == "import" || elem == "export" || elem == "both" {
cur = elem
continue
}
rt, err := bgp.ParseRouteTarget(elem)
if err != nil {
return err
}
switch cur {
case "import":
importRt = append(importRt, rt)
case "export":
exportRt = append(exportRt, rt)
case "both":
importRt = append(importRt, rt)
exportRt = append(exportRt, rt)
default:
return fmt.Errorf("Usage: gobgp vrf add <vrf name> rd <rd> rt { import | export | both } <rt>...")
}
}
vrfId := 0
if len(a["id"]) > 0 {
vrfId, err = strconv.Atoi(a["id"][0])
if err != nil {
return err
}
}
err = client.AddVRF(name, vrfId, rd, importRt, exportRt)
case CMD_DEL:
if len(args) != 1 {
return fmt.Errorf("Usage: gobgp vrf del <vrf name>")
}
err = client.DeleteVRF(args[0])
}
return err
}
func extractRouteDistinguisher(args []string) ([]string, bgp.RouteDistinguisherInterface, error) {
for idx, arg := range args {
if arg == "rd" {
if len(args) < (idx + 1) {
return nil, nil, fmt.Errorf("invalid rd format")
}
rd, err := bgp.ParseRouteDistinguisher(args[idx+1])
if err != nil {
return nil, nil, err
}
return append(args[:idx], args[idx+2:]...), rd, nil
}
}
return args, nil, nil
}
func ParseEvpnMulticastArgs(args []string) (bgp.AddrPrefixInterface, []string, error) {
if len(args) < 2 {
return nil, nil, fmt.Errorf("lack of number of args needs 2 but %d", len(args))
}
var nlri bgp.AddrPrefixInterface
var ip net.IP
iplen := 0
if args[0] != "0.0.0.0" && args[0] != "::" {
ip = net.ParseIP(args[0])
if ip == nil {
return nil, nil, fmt.Errorf("invalid ip prefix: %s", args[0])
}
iplen = net.IPv4len * 8
if ip.To4() == nil {
iplen = net.IPv6len * 8
}
}
eTag, err := strconv.Atoi(args[1])
if err != nil {
return nil, nil, fmt.Errorf("invalid eTag: %s. err: %s", args[1], err)
}
var rd bgp.RouteDistinguisherInterface
if args[2] == "rd" && len(args) > 3 {
rd, err = bgp.ParseRouteDistinguisher(args[3])
if err != nil {
return nil, nil, err
}
}
multicastEtag := &bgp.EVPNMulticastEthernetTagRoute{
RD: rd,
IPAddressLength: uint8(iplen),
IPAddress: ip,
ETag: uint32(eTag),
}
extcomms := args[4:]
nlri = bgp.NewEVPNNLRI(bgp.EVPN_INCLUSIVE_MULTICAST_ETHERNET_TAG, 0, multicastEtag)
return nlri, extcomms, nil
}
func modVrf(typ string, args []string) error {
var err error
switch typ {
case CMD_ADD:
if len(args) < 6 || args[1] != "rd" || args[3] != "rt" {
return fmt.Errorf("Usage: gobgp vrf add <vrf name> rd <rd> rt { import | export | both } <rt>...")
}
name := args[0]
rd, err := bgp.ParseRouteDistinguisher(args[2])
if err != nil {
return err
}
cur := ""
importRt := make([][]byte, 0)
exportRt := make([][]byte, 0)
for _, elem := range args[4:] {
if elem == "import" || elem == "export" || elem == "both" {
cur = elem
continue
}
rt, err := bgp.ParseRouteTarget(elem)
if err != nil {
return err
}
buf, err := rt.Serialize()
if err != nil {
return err
}
switch cur {
case "import":
importRt = append(importRt, buf)
case "export":
exportRt = append(exportRt, buf)
case "both":
importRt = append(importRt, buf)
exportRt = append(exportRt, buf)
default:
return fmt.Errorf("Usage: gobgp vrf add <vrf name> rd <rd> rt { import | export | both } <rt>...")
}
}
buf, _ := rd.Serialize()
arg := &api.AddVrfRequest{
Vrf: &api.Vrf{
Name: name,
Rd: buf,
ImportRt: importRt,
ExportRt: exportRt,
},
}
_, err = client.AddVrf(context.Background(), arg)
case CMD_DEL:
if len(args) != 1 {
return fmt.Errorf("Usage: gobgp vrf del <vrf name>")
}
arg := &api.DeleteVrfRequest{
Vrf: &api.Vrf{
Name: args[0],
},
}
_, err = client.DeleteVrf(context.Background(), arg)
}
return err
}
func ParsePath(rf bgp.RouteFamily, args []string) (*api.Path, error) {
var nlri bgp.AddrPrefixInterface
var extcomms []string
var err error
attrs := table.PathAttrs(make([]bgp.PathAttributeInterface, 0, 1))
path := &api.Path{
Pattrs: make([][]byte, 0),
}
fns := []func([]string) ([]string, bgp.PathAttributeInterface, error){
extractOrigin,
extractMed,
extractLocalPref,
extractCommunity,
extractAigp,
}
for _, fn := range fns {
var a bgp.PathAttributeInterface
args, a, err = fn(args)
if err != nil {
return nil, err
}
if a != nil {
attrs = append(attrs, a)
}
}
args, nexthop, err := extractNexthop(rf, args)
if err != nil {
return nil, err
}
switch rf {
case bgp.RF_IPv4_UC, bgp.RF_IPv6_UC:
if len(args) < 1 {
return nil, fmt.Errorf("invalid format")
}
ip, net, err := net.ParseCIDR(args[0])
if err != nil {
return nil, err
}
ones, _ := net.Mask.Size()
if rf == bgp.RF_IPv4_UC {
if ip.To4() == nil {
return nil, fmt.Errorf("invalid ipv4 prefix")
}
nlri = bgp.NewIPAddrPrefix(uint8(ones), ip.String())
} else {
if ip.To16() == nil {
return nil, fmt.Errorf("invalid ipv6 prefix")
}
nlri = bgp.NewIPv6AddrPrefix(uint8(ones), ip.String())
}
extcomms = args[1:]
case bgp.RF_IPv4_VPN, bgp.RF_IPv6_VPN:
if len(args) < 3 || args[1] != "rd" {
return nil, fmt.Errorf("invalid format")
}
ip, net, _ := net.ParseCIDR(args[0])
ones, _ := net.Mask.Size()
rd, err := bgp.ParseRouteDistinguisher(args[2])
if err != nil {
return nil, err
}
extcomms = args[3:]
mpls := bgp.NewMPLSLabelStack()
if rf == bgp.RF_IPv4_VPN {
if ip.To4() == nil {
return nil, fmt.Errorf("invalid ipv4 prefix")
}
nlri = bgp.NewLabeledVPNIPAddrPrefix(uint8(ones), ip.String(), *mpls, rd)
} else {
if ip.To16() == nil {
return nil, fmt.Errorf("invalid ipv6 prefix")
}
nlri = bgp.NewLabeledVPNIPv6AddrPrefix(uint8(ones), ip.String(), *mpls, rd)
}
case bgp.RF_IPv4_MPLS, bgp.RF_IPv6_MPLS:
if len(args) < 2 {
return nil, fmt.Errorf("invalid format")
}
ip, net, _ := net.ParseCIDR(args[0])
ones, _ := net.Mask.Size()
mpls, err := bgp.ParseMPLSLabelStack(args[1])
if err != nil {
return nil, err
}
extcomms = args[2:]
if rf == bgp.RF_IPv4_MPLS {
if ip.To4() == nil {
return nil, fmt.Errorf("invalid ipv4 prefix")
}
nlri = bgp.NewLabeledIPAddrPrefix(uint8(ones), ip.String(), *mpls)
} else {
if ip.To4() != nil {
return nil, fmt.Errorf("invalid ipv6 prefix")
}
nlri = bgp.NewLabeledIPv6AddrPrefix(uint8(ones), ip.String(), *mpls)
}
case bgp.RF_EVPN:
nlri, extcomms, err = ParseEvpnArgs(args)
case bgp.RF_FS_IPv4_UC, bgp.RF_FS_IPv6_UC, bgp.RF_FS_L2_VPN:
nlri, extcomms, err = ParseFlowSpecArgs(rf, args)
case bgp.RF_OPAQUE:
m := extractReserved(args, []string{"key", "value"})
if len(m["key"]) != 1 || len(m["value"]) != 1 {
return nil, fmt.Errorf("invalid key-value format")
}
nlri = bgp.NewOpaqueNLRI([]byte(m["key"][0]))
attrs = append(attrs, bgp.NewPathAttributeOpaqueValue([]byte(m["value"][0])))
default:
return nil, fmt.Errorf("Unsupported route family: %s", rf)
}
if err != nil {
return nil, err
}
if rf == bgp.RF_IPv4_UC {
path.Nlri, _ = nlri.Serialize()
attrs = append(attrs, bgp.NewPathAttributeNextHop(nexthop))
} else {
mpreach := bgp.NewPathAttributeMpReachNLRI(nexthop, []bgp.AddrPrefixInterface{nlri})
attrs = append(attrs, mpreach)
}
if extcomms != nil && len(extcomms) > 0 {
extcomms, err := ParseExtendedCommunities(strings.Join(extcomms, " "))
if err != nil {
return nil, err
}
p := bgp.NewPathAttributeExtendedCommunities(extcomms)
attrs = append(attrs, p)
}
sort.Sort(attrs)
for _, attr := range attrs {
buf, err := attr.Serialize()
if err != nil {
return nil, err
}
path.Pattrs = append(path.Pattrs, buf)
}
return path, nil
}
func ParsePath(rf bgp.RouteFamily, args []string) (*table.Path, error) {
var nlri bgp.AddrPrefixInterface
var rd bgp.RouteDistinguisherInterface
var extcomms []string
var err error
attrs := table.PathAttrs(make([]bgp.PathAttributeInterface, 0, 1))
fns := []func([]string) ([]string, bgp.PathAttributeInterface, error){
extractOrigin,
extractMed,
extractLocalPref,
extractCommunity,
extractAigp,
extractAggregator,
extractLargeCommunity,
}
for _, fn := range fns {
var a bgp.PathAttributeInterface
args, a, err = fn(args)
if err != nil {
return nil, err
}
if a != nil {
attrs = append(attrs, a)
}
}
args, nexthop, err := extractNexthop(rf, args)
if err != nil {
return nil, err
}
switch rf {
case bgp.RF_IPv4_UC, bgp.RF_IPv6_UC:
if len(args) < 1 {
return nil, fmt.Errorf("invalid format")
}
ip, net, err := net.ParseCIDR(args[0])
if err != nil {
return nil, err
}
ones, _ := net.Mask.Size()
if rf == bgp.RF_IPv4_UC {
if ip.To4() == nil {
return nil, fmt.Errorf("invalid ipv4 prefix")
}
nlri = bgp.NewIPAddrPrefix(uint8(ones), ip.String())
} else {
if ip.To16() == nil {
return nil, fmt.Errorf("invalid ipv6 prefix")
}
nlri = bgp.NewIPv6AddrPrefix(uint8(ones), ip.String())
}
extcomms = args[1:]
case bgp.RF_IPv4_VPN, bgp.RF_IPv6_VPN:
if len(args) < 5 || args[1] != "label" || args[3] != "rd" {
return nil, fmt.Errorf("invalid format")
}
ip, net, _ := net.ParseCIDR(args[0])
ones, _ := net.Mask.Size()
label := 0
if label, err = strconv.Atoi(args[2]); err != nil {
return nil, fmt.Errorf("invalid format")
}
mpls := bgp.NewMPLSLabelStack(uint32(label))
rd, err = bgp.ParseRouteDistinguisher(args[4])
if err != nil {
return nil, err
}
extcomms = args[5:]
if rf == bgp.RF_IPv4_VPN {
if ip.To4() == nil {
return nil, fmt.Errorf("invalid ipv4 prefix")
}
nlri = bgp.NewLabeledVPNIPAddrPrefix(uint8(ones), ip.String(), *mpls, rd)
} else {
if ip.To16() == nil {
return nil, fmt.Errorf("invalid ipv6 prefix")
}
nlri = bgp.NewLabeledVPNIPv6AddrPrefix(uint8(ones), ip.String(), *mpls, rd)
}
case bgp.RF_IPv4_MPLS, bgp.RF_IPv6_MPLS:
if len(args) < 2 {
return nil, fmt.Errorf("invalid format")
}
ip, net, _ := net.ParseCIDR(args[0])
ones, _ := net.Mask.Size()
mpls, err := bgp.ParseMPLSLabelStack(args[1])
if err != nil {
return nil, err
}
extcomms = args[2:]
if rf == bgp.RF_IPv4_MPLS {
if ip.To4() == nil {
return nil, fmt.Errorf("invalid ipv4 prefix")
}
nlri = bgp.NewLabeledIPAddrPrefix(uint8(ones), ip.String(), *mpls)
} else {
if ip.To4() != nil {
return nil, fmt.Errorf("invalid ipv6 prefix")
}
nlri = bgp.NewLabeledIPv6AddrPrefix(uint8(ones), ip.String(), *mpls)
}
case bgp.RF_EVPN:
nlri, extcomms, err = ParseEvpnArgs(args)
case bgp.RF_FS_IPv4_VPN, bgp.RF_FS_IPv6_VPN, bgp.RF_FS_L2_VPN:
args, rd, err = extractRouteDistinguisher(args)
if err != nil {
return nil, err
}
fallthrough
case bgp.RF_FS_IPv4_UC, bgp.RF_FS_IPv6_UC:
nlri, extcomms, err = ParseFlowSpecArgs(rf, args, rd)
case bgp.RF_OPAQUE:
m := extractReserved(args, []string{"key", "value"})
if len(m["key"]) != 1 {
return nil, fmt.Errorf("opaque nlri key missing")
}
if len(m["value"]) > 0 {
nlri = bgp.NewOpaqueNLRI([]byte(m["key"][0]), []byte(m["value"][0]))
} else {
nlri = bgp.NewOpaqueNLRI([]byte(m["key"][0]), nil)
}
default:
return nil, fmt.Errorf("Unsupported route family: %s", rf)
}
if err != nil {
return nil, err
}
if rf == bgp.RF_IPv4_UC {
attrs = append(attrs, bgp.NewPathAttributeNextHop(nexthop))
} else {
mpreach := bgp.NewPathAttributeMpReachNLRI(nexthop, []bgp.AddrPrefixInterface{nlri})
attrs = append(attrs, mpreach)
}
if extcomms != nil && len(extcomms) > 0 {
extcomms, err := ParseExtendedCommunities(strings.Join(extcomms, " "))
if err != nil {
return nil, err
}
p := bgp.NewPathAttributeExtendedCommunities(extcomms)
attrs = append(attrs, p)
}
sort.Sort(attrs)
return table.NewPath(nil, nlri, false, attrs, time.Now(), false), nil
}
