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bgp3workers.go
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bgp3workers.go
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package bgpqworkers
import (
"bytes"
"encoding/json"
"github.com/ipcjk/ixgen/ixtypes"
"log"
"os"
"os/exec"
"runtime"
)
type BGPQ3Config struct {
Executable string
}
type BGPQ3Worker struct {
BGPQ3Config
}
func NewBGPQ3Worker(Config BGPQ3Config) BGPQ3Worker {
if runtime.GOOS == "linux" {
Config.Executable = "bgpq3.linux"
} else if runtime.GOOS == "darwin" {
Config.Executable = "bgpq3.mac"
}
Config.Executable = findExecutable(Config.Executable)
return BGPQ3Worker{BGPQ3Config: Config}
}
func (b *BGPQ3Worker) GenPrefixList(prefixListName, asMacro string, ipProtocol int, aggregateMax bool) (ixtypes.PrefixFilters, error) {
var w = new(bytes.Buffer)
var prefixFilters ixtypes.PrefixFilters
var extraArgs []string
if ipProtocol == 4 {
extraArgs = append(extraArgs, "-4")
} else {
extraArgs = append(extraArgs, "-6")
}
if aggregateMax == true {
extraArgs = append(extraArgs, "-A")
}
extraArgs = append(extraArgs, "-j", "-l", prefixListName, asMacro)
cmd := exec.Command(b.Executable, extraArgs[0:]...)
cmd.Stdout = w
cmd.Stderr = w
err := cmd.Run()
if err != nil {
return ixtypes.PrefixFilters{}, err
}
err = json.Unmarshal(w.Bytes(), &prefixFilters)
if err != nil {
return ixtypes.PrefixFilters{}, err
}
return prefixFilters, nil
}
func findExecutable(execName string) string {
if _, err := os.Stat(execName); err == nil {
return "./" + execName
} else if _, err := os.Stat("../" + execName); err == nil {
return "../" + execName
} else if path, err := exec.LookPath(execName); err == nil {
return path
} else {
log.Fatalf("Cant find " + execName)
}
return execName
}