bgp/cli: support flowspec (RFC5575)

draft-ietf-idr-flowspec-redirect-rt-bis-05 is also implmented.

TODO: draft-ietf-idr-flow-spec-v6-06

Signed-off-by: ISHIDA Wataru <ishida.wataru@lab.ntt.co.jp>

1 files changed, 102 insertions, 0 deletions

diff --git a/packet/constant.go b/packet/constant.go
index 31002c1b..c8de8007 100644
--- a/packet/constant.go
+++ b/packet/constant.go
@@ -15,6 +15,11 @@
 
 package bgp
 
+import (
+	"fmt"
+	"strings"
+)
+
 const AS_TRANS = 23456
 
 const BGP_PORT = 179
@@ -30,3 +35,100 @@ const (
 	BGP_FSM_OPENCONFIRM
 	BGP_FSM_ESTABLISHED
 )
+
+// partially taken from http://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml
+type Protocol int
+
+const (
+	Unknown Protocol = iota
+	ICMP             = 0x01
+	IGMP             = 0x02
+	TCP              = 0x06
+	EGP              = 0x08
+	IGP              = 0x09
+	UDP              = 0x11
+	RSVP             = 0x2e
+	GRE              = 0x2f
+	OSPF             = 0x59
+	IPIP             = 0x5e
+	PIM              = 0x67
+	SCTP             = 0x84
+)
+
+var ProtocolNameMap = map[Protocol]string{
+	Unknown: "unknown",
+	ICMP:    "icmp",
+	IGMP:    "igmp",
+	TCP:     "tcp",
+	EGP:     "egp",
+	IGP:     "igp",
+	UDP:     "udp",
+	RSVP:    "rsvp",
+	GRE:     "gre",
+	OSPF:    "ospf",
+	IPIP:    "ipip",
+	PIM:     "pim",
+	SCTP:    "sctp",
+}
+
+var ProtocolValueMap = map[string]Protocol{
+	ProtocolNameMap[ICMP]: ICMP,
+	ProtocolNameMap[IGMP]: IGMP,
+	ProtocolNameMap[TCP]:  TCP,
+	ProtocolNameMap[EGP]:  EGP,
+	ProtocolNameMap[IGP]:  IGP,
+	ProtocolNameMap[UDP]:  UDP,
+	ProtocolNameMap[RSVP]: RSVP,
+	ProtocolNameMap[GRE]:  GRE,
+	ProtocolNameMap[OSPF]: OSPF,
+	ProtocolNameMap[IPIP]: IPIP,
+	ProtocolNameMap[PIM]:  PIM,
+	ProtocolNameMap[SCTP]: SCTP,
+}
+
+func (p Protocol) String() string {
+	name, ok := ProtocolNameMap[p]
+	if !ok {
+		return fmt.Sprintf("%d", p)
+	}
+	return name
+}
+
+type TCPFlag int
+
+const (
+	TCP_FLAG_FIN    = 0x01
+	TCP_FLAG_SYN    = 0x02
+	TCP_FLAG_RST    = 0x04
+	TCP_FLAG_PUSH   = 0x08
+	TCP_FLAG_ACK    = 0x10
+	TCP_FLAG_URGENT = 0x20
+)
+
+var TCPFlagNameMap = map[TCPFlag]string{
+	TCP_FLAG_FIN:    "fin",
+	TCP_FLAG_SYN:    "syn",
+	TCP_FLAG_RST:    "rst",
+	TCP_FLAG_PUSH:   "push",
+	TCP_FLAG_ACK:    "ack",
+	TCP_FLAG_URGENT: "urgent",
+}
+
+var TCPFlagValueMap = map[string]TCPFlag{
+	TCPFlagNameMap[TCP_FLAG_FIN]:    TCP_FLAG_FIN,
+	TCPFlagNameMap[TCP_FLAG_SYN]:    TCP_FLAG_SYN,
+	TCPFlagNameMap[TCP_FLAG_RST]:    TCP_FLAG_RST,
+	TCPFlagNameMap[TCP_FLAG_PUSH]:   TCP_FLAG_PUSH,
+	TCPFlagNameMap[TCP_FLAG_ACK]:    TCP_FLAG_ACK,
+	TCPFlagNameMap[TCP_FLAG_URGENT]: TCP_FLAG_URGENT,
+}
+
+func (f TCPFlag) String() string {
+	ss := make([]string, 0, 6)
+	for k, v := range TCPFlagNameMap {
+		if f&k > 0 {
+			ss = append(ss, v)
+		}
+	}
+	return strings.Join(ss, "|")
+}