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// Copyright (C) 2014 Nippon Telegraph and Telephone Corporation.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package bgp
import (
"fmt"
"strings"
)
const AS_TRANS = 23456
const BGP_PORT = 179
type FSMState int
const (
BGP_FSM_IDLE FSMState = iota
BGP_FSM_CONNECT
BGP_FSM_ACTIVE
BGP_FSM_OPENSENT
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 _, v := range []TCPFlag{TCP_FLAG_FIN, TCP_FLAG_SYN, TCP_FLAG_RST, TCP_FLAG_PUSH, TCP_FLAG_ACK, TCP_FLAG_URGENT} {
if f&v > 0 {
ss = append(ss, TCPFlagNameMap[v])
}
}
return strings.Join(ss, "|")
}
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