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package methods
import (
"errors"
"fmt"
"fpdns_client/utils"
"strconv"
"time"
"github.com/miekg/dns"
)
func ProbeStart(addr string, sld string) (int, error) {
time_now := strconv.FormatInt(time.Now().Unix(), 10)
domain := dns.Fqdn("start-" + time_now + "." + sld)
res, err := utils.DNSQuery(addr, domain, false, 1, 1, false)
if err == nil {
if len(res.Answer) == 1 {
if a, ok := res.Answer[0].(*dns.A); ok {
ip_str := a.A.String()
ip_val, _ := utils.IPv4ToInt(ip_str)
return int(ip_val), nil
}
}
} else {
return 0, err
}
return 0, errors.New("wrong token response")
}
func InitProbe(addr string, token int, sld string) error {
time_now := strconv.FormatInt(time.Now().Unix(), 10)
domain := dns.Fqdn("init-" + time_now + "-" + strconv.Itoa(token) + "." + sld)
res, err := utils.DNSQuery(addr, domain, true, 1, 1, false)
if err != nil {
return err
} else {
if len(res.Answer) == 1 {
if a, ok := res.Answer[0].(*dns.A); ok {
ip_str := a.A.String()
if ip_str == "200.200.200.200" {
return nil
}
} else {
return errors.New("invalid Reply Code")
}
}
}
return errors.New("init query failure")
}
func ProbeTerminate(addr string, token int, sld string) error {
time_now := strconv.FormatInt(time.Now().Unix(), 10)
domain := dns.Fqdn("end-" + time_now + "-" + strconv.Itoa(token) + "." + sld)
res, err := utils.DNSQuery(addr, domain, false, 1, 1, false)
if err != nil {
return err
} else {
if len(res.Answer) == 1 {
if a, ok := res.Answer[0].(*dns.A); ok {
ip_str := a.A.String()
if ip_str == "200.200.200.200" {
return nil
}
} else {
return errors.New("invalid Reply Code")
}
}
}
return errors.New("terminate query failure")
}
func BehaviorTest(target string, server string, api_port string, sld string) (string, error) {
target_addr := target + ":53"
server_addr := server + ":53"
result_addr := server + ":" + api_port
token, err := ProbeStart(server_addr, sld)
if err != nil {
return "", err
}
err = InitProbe(target_addr, token, sld)
if err != nil {
return "", err
}
err = ProbeTerminate(server_addr, token, sld)
if err != nil {
return "", err
}
data, err := utils.GetResult(result_addr, token)
if err != nil {
return "", err
}
json_str, _ := utils.OutputJson(data)
fmt.Println(json_str)
return "", nil
}
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