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package main
import (
"bytes"
"fmt"
"github.com/BurntSushi/toml"
"github.com/jessevdk/go-flags"
"github.com/osrg/gobgp/config"
"io/ioutil"
"log"
"net"
"os"
"path/filepath"
)
var serverAddress = make(map[string]string)
var baseNeighborAddress = make(map[string]string)
var baseNeighborNetwork = make(map[string]string)
var baseNeighborNetMask = make(map[string]string)
const (
IPv4 = "IPv4"
IPv6 = "IPv6"
)
type QuaggaConfig struct {
id int
config *config.Neighbor
gobgpConfig *config.Global
serverIP net.IP
}
func NewQuaggaConfig(id int, gConfig *config.Global, myConfig *config.Neighbor, server net.IP) *QuaggaConfig {
return &QuaggaConfig{
id: id,
config: myConfig,
gobgpConfig: gConfig,
serverIP: server,
}
}
func (qt *QuaggaConfig) IPv4Config() *bytes.Buffer {
buf := bytes.NewBuffer(nil)
buf.WriteString(fmt.Sprintf("! my address %s\n", qt.config.NeighborAddress))
buf.WriteString("! my ip_version IPv4\n")
buf.WriteString("hostname bgpd\n")
buf.WriteString("password zebra\n")
buf.WriteString(fmt.Sprintf("router bgp %d\n", qt.config.PeerAs))
buf.WriteString(fmt.Sprintf("bgp router-id 192.168.0.%d\n", qt.id))
buf.WriteString(fmt.Sprintf("network %s%d%s\n", baseNeighborNetwork["IPv4"], qt.id, baseNeighborNetMask["IPv4"]))
buf.WriteString(fmt.Sprintf("neighbor %s remote-as %d\n", qt.serverIP, qt.gobgpConfig.As))
buf.WriteString(fmt.Sprintf("neighbor %s password %s\n", qt.serverIP, qt.config.AuthPassword))
buf.WriteString("log file /var/log/quagga/bgpd.log\n")
return buf
}
func (qt *QuaggaConfig) IPv6Config() *bytes.Buffer {
buf := bytes.NewBuffer(nil)
buf.WriteString(fmt.Sprintf("! my address %s\n", qt.config.NeighborAddress))
buf.WriteString("! my ip_version IPv6\n")
buf.WriteString("hostname bgpd\n")
buf.WriteString("password zebra\n")
buf.WriteString(fmt.Sprintf("router bgp %d\n", qt.config.PeerAs))
buf.WriteString(fmt.Sprintf("bgp router-id 192.168.0.%d\n", qt.id))
buf.WriteString("no bgp default ipv4-unicast\n")
buf.WriteString(fmt.Sprintf("neighbor %s remote-as %d\n", qt.serverIP, qt.gobgpConfig.As))
buf.WriteString(fmt.Sprintf("neighbor %s password %s\n", qt.serverIP, qt.config.AuthPassword))
buf.WriteString("address-family ipv6\n")
buf.WriteString(fmt.Sprintf("network %s%d%s\n", baseNeighborNetwork["IPv6"], qt.id, baseNeighborNetMask["IPv6"]))
buf.WriteString(fmt.Sprintf("neighbor %s activate\n", qt.serverIP))
buf.WriteString(fmt.Sprintf("neighbor %s route-map IPV6-OUT out\n", qt.serverIP))
buf.WriteString("exit-address-family\n")
buf.WriteString("ipv6 prefix-list pl-ipv6 seq 10 permit any\n")
buf.WriteString("route-map IPV6-OUT permit 10\n")
buf.WriteString("match ipv6 address prefix-list pl-ipv6\n")
buf.WriteString(fmt.Sprintf("set ipv6 next-hop global %s\n", qt.config.NeighborAddress))
buf.WriteString("log file /var/log/quagga/bgpd.log\n")
return buf
}
func create_config_files(nr int, outputDir string, IPVersion string) {
quaggaConfigList := make([]*QuaggaConfig, 0)
gobgpConf := config.Bgp{
Global: config.Global{
As: 65000,
RouterId: net.ParseIP("192.168.255.1"),
},
}
for i := 1; i < nr+1; i++ {
c := config.Neighbor{
PeerAs: 65000 + uint32(i),
NeighborAddress: net.ParseIP(fmt.Sprintf("%s%d", baseNeighborAddress[IPVersion], i)),
AuthPassword: fmt.Sprintf("hoge%d", i),
}
gobgpConf.NeighborList = append(gobgpConf.NeighborList, c)
q := NewQuaggaConfig(i, &gobgpConf.Global, &c, net.ParseIP(serverAddress[IPVersion]))
quaggaConfigList = append(quaggaConfigList, q)
os.Mkdir(fmt.Sprintf("%s/q%d", outputDir, i), 0755)
var err error
if IPVersion == "IPv6" {
err = ioutil.WriteFile(fmt.Sprintf("%s/q%d/bgpd.conf", outputDir, i), q.IPv6Config().Bytes(), 0644)
} else {
err = ioutil.WriteFile(fmt.Sprintf("%s/q%d/bgpd.conf", outputDir, i), q.IPv4Config().Bytes(), 0644)
}
if err != nil {
log.Fatal(err)
}
}
var buffer bytes.Buffer
encoder := toml.NewEncoder(&buffer)
encoder.Encode(gobgpConf)
err := ioutil.WriteFile(fmt.Sprintf("%s/gobgpd.conf", outputDir), buffer.Bytes(), 0644)
if err != nil {
log.Fatal(err)
}
}
func append_config_files(ar int, outputDir string, IPVersion string) {
gobgpConf := config.Bgp{
Global: config.Global{
As: 65000,
RouterId: net.ParseIP("192.168.255.1"),
},
}
c := config.Neighbor{
PeerAs: 65000 + uint32(ar),
NeighborAddress: net.ParseIP(fmt.Sprintf("%s%d", baseNeighborAddress[IPVersion], ar)),
AuthPassword: fmt.Sprintf("hoge%d", ar),
}
q := NewQuaggaConfig(ar, &gobgpConf.Global, &c, net.ParseIP(serverAddress[IPVersion]))
os.Mkdir(fmt.Sprintf("%s/q%d", outputDir, ar), 0755)
var err error
if IPVersion == "IPv6" {
err = ioutil.WriteFile(fmt.Sprintf("%s/q%d/bgpd.conf", outputDir, ar), q.IPv6Config().Bytes(), 0644)
} else {
err = ioutil.WriteFile(fmt.Sprintf("%s/q%d/bgpd.conf", outputDir, ar), q.IPv4Config().Bytes(), 0644)
}
if err != nil {
log.Fatal(err)
}
newConf := config.Bgp{}
_, d_err := toml.DecodeFile(fmt.Sprintf("%s/gobgpd.conf", outputDir), &newConf)
if d_err != nil {
log.Fatal(err)
}
newConf.NeighborList = append(newConf.NeighborList, c)
var buffer bytes.Buffer
encoder := toml.NewEncoder(&buffer)
encoder.Encode(newConf)
e_err := ioutil.WriteFile(fmt.Sprintf("%s/gobgpd.conf", outputDir), buffer.Bytes(), 0644)
if e_err != nil {
log.Fatal(err)
}
}
func main() {
var opts struct {
ClientNumber int `short:"n" long:"client-number" description:"specfying the number of clients" default:"8"`
OutputDir string `short:"c" long:"output" description:"specifing the output directory"`
AppendClient int `short:"a" long:"append" description:"specifing the add client number" default:"0"`
IPVersion string `short:"v" long:"ip-version" description:"specifing the use ip version" default:"IPv4"`
NetIdentifier int `short:"i" long:"net-identifer" description:"specifing the use network identifier" default:"0"`
}
parser := flags.NewParser(&opts, flags.Default)
_, err := parser.Parse()
if err != nil {
fmt.Print(err)
os.Exit(1)
}
if opts.OutputDir == "" {
opts.OutputDir, _ = filepath.Abs(".")
} else {
if _, err := os.Stat(opts.OutputDir); os.IsNotExist(err) {
os.Mkdir(opts.OutputDir, 0755)
}
}
if opts.IPVersion == IPv6 {
serverAddress[IPv6] = fmt.Sprintf("2001::%d:192:168:255:1", opts.NetIdentifier)
baseNeighborAddress[IPv6] = fmt.Sprintf("2001::%d:192:168:0:", opts.NetIdentifier)
baseNeighborNetwork[IPv6] = "2001:0:10:"
baseNeighborNetMask[IPv6] = "::/64"
} else {
opts.IPVersion = IPv4
serverAddress[IPv4] = fmt.Sprintf("1%d.0.255.1", opts.NetIdentifier)
baseNeighborAddress[IPv4] = fmt.Sprintf("1%d.0.0.", opts.NetIdentifier)
baseNeighborNetwork[IPv4] = "192.168."
baseNeighborNetMask[IPv4] = ".0/24"
}
if opts.AppendClient == 0 {
create_config_files(opts.ClientNumber, opts.OutputDir, opts.IPVersion)
} else {
if _, err := os.Stat(fmt.Sprintf("%s/gobgpd.conf", opts.OutputDir)); os.IsNotExist(err) {
log.Fatal(err)
}
append_config_files(opts.AppendClient, opts.OutputDir, opts.IPVersion)
}
}
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