CasaOS/route/v1/zerotier.go
2023-07-25 03:28:52 +01:00

313 lines
6.6 KiB
Go

package v1
import (
"fmt"
"io/ioutil"
"math/rand"
"net"
"net/http"
"strings"
"time"
"github.com/IceWhaleTech/CasaOS-Common/utils/logger"
"github.com/IceWhaleTech/CasaOS/common"
"github.com/IceWhaleTech/CasaOS/pkg/utils/httper"
"github.com/gin-gonic/gin"
"github.com/tidwall/gjson"
"go.uber.org/zap"
)
func ZerotierProxy(c *gin.Context) {
// Read the port number from the file
w := c.Writer
r := c.Request
port, err := ioutil.ReadFile("/var/lib/zerotier-one/zerotier-one.port")
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
// Get the request path and remove "/zt"
path := strings.TrimPrefix(r.URL.Path, "/v1/zt")
fmt.Println(path)
// Build the target URL
targetURL := fmt.Sprintf("http://localhost:%s%s", strings.TrimSpace(string(port)), path)
// Create a new request
req, err := http.NewRequest(r.Method, targetURL, r.Body)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
// Add the X-ZT1-AUTH header
authToken, err := ioutil.ReadFile("/var/lib/zerotier-one/authtoken.secret")
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
req.Header.Set("X-ZT1-AUTH", strings.TrimSpace(string(authToken)))
copyHeaders(req.Header, r.Header)
client := http.Client{}
resp, err := client.Do(req)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
defer resp.Body.Close()
copyHeaders(w.Header(), resp.Header)
respBody, err := ioutil.ReadAll(resp.Body)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
// Return the response to the client
w.WriteHeader(resp.StatusCode)
w.Write(respBody)
}
func copyHeaders(destination, source http.Header) {
for key, values := range source {
for _, value := range values {
destination.Add(key, value)
}
}
}
func CheckNetwork() {
logger.Info("start check network")
respBody, err := httper.ZTGet("/controller/network")
if err != nil {
logger.Error("get network error", zap.Error(err))
return
}
networkId := ""
address := ""
networkNames := gjson.ParseBytes(respBody).Array()
routers := ""
for _, v := range networkNames {
res, err := httper.ZTGet("/controller/network/" + v.Str)
if err != nil {
logger.Error("get network error", zap.Error(err))
return
}
name := gjson.GetBytes(res, "name").Str
if name == common.RANW_NAME {
networkId = gjson.GetBytes(res, "id").Str
routers = gjson.GetBytes(res, "routes.0.target").Str
break
}
}
ip, s, e, c := getZTIP(routers)
logger.Info("ip", zap.Any("ip", ip))
if len(networkId) == 0 {
if len(address) == 0 {
address = GetAddress()
}
networkId = CreateNet(address, s, e, c)
}
res, err := httper.ZTGet("/network")
if err != nil {
logger.Error("get network error", zap.Error(err))
return
}
joined := false
networks := gjson.GetBytes(res, "#.id").Array()
for _, v := range networks {
if v.Str == networkId {
joined = true
break
}
}
logger.Info("joined", zap.Any("joined", joined))
if !joined {
JoinAndUpdateNet(address, networkId, ip)
}
}
func GetAddress() string {
nodeRes, err := httper.ZTGet("/status")
if err != nil {
logger.Error("get status error", zap.Error(err))
return ""
}
return gjson.GetBytes(nodeRes, "address").String()
}
func JoinAndUpdateNet(address, networkId, ip string) {
logger.Info("start join network", zap.Any("ip", ip))
_, err := httper.ZTPost("/network/"+networkId, "")
if err != nil {
logger.Error(" get network error", zap.Error(err))
return
}
if len(address) == 0 {
address = GetAddress()
}
b := `{
"authorized": true,
"activeBridge": true,
"ipAssignments": [
"` + ip + `"
]
}`
_, err = httper.ZTPost("/controller/network/"+networkId+"/member/"+address, b)
if err != nil {
logger.Error("join network error", zap.Error(err))
return
}
}
func CreateNet(address, s, e, c string) string {
body := `{
"name": "` + common.RANW_NAME + `",
"private": false,
"v4AssignMode": {
"zt": true
},
"ipAssignmentPools": [
{
"ipRangeStart": "` + s + `",
"ipRangeEnd": "` + e + `"
}
],
"routes": [
{
"target": "` + c + `"
}
],
"rules": [
{
"etherType": 2048,
"not": true,
"or": false,
"type": "MATCH_ETHERTYPE"
},
{
"etherType": 2054,
"not": true,
"or": false,
"type": "MATCH_ETHERTYPE"
},
{
"etherType": 34525,
"not": true,
"or": false,
"type": "MATCH_ETHERTYPE"
},
{
"type": "ACTION_DROP"
},
{
"type": "ACTION_ACCEPT"
}
],
"v6AssignMode": {
"rfc4193": true
}
}`
createRes, err := httper.ZTPost("/controller/network/"+address+"______", body)
if err != nil {
logger.Error("post network error", zap.Error(err))
return ""
}
return gjson.GetBytes(createRes, "id").Str
}
func GetZTIPs() []gjson.Result {
res, err := httper.ZTGet("/network")
if err != nil {
logger.Error("get network error", zap.Error(err))
return []gjson.Result{}
}
a := gjson.GetBytes(res, "#.routes.0.target")
return a.Array()
}
func getZTIP(routes string) (ip, start, end, cidr string) {
excluded := GetZTIPs()
cidrs := []string{
"10.147.11.0/24",
"10.147.12.0/24",
"10.147.13.0/24",
"10.147.14.0/24",
"10.147.15.0/24",
"10.147.16.0/24",
"10.147.17.0/24",
"10.147.18.0/24",
"10.147.19.0/24",
"10.147.20.0/24",
"10.240.0.0/16",
"10.241.0.0/16",
"10.242.0.0/16",
"10.243.0.0/16",
"10.244.0.0/16",
"10.245.0.0/16",
"10.246.0.0/16",
"10.247.0.0/16",
"10.248.0.0/16",
"10.249.0.0/16",
"172.21.0.0/16",
"172.22.0.0/16",
"172.23.0.0/16",
"172.24.0.0/16",
"172.25.0.0/16",
"172.26.0.0/16",
"172.27.0.0/16",
"172.28.0.0/16",
"172.29.0.0/16",
"172.30.0.0/16",
}
filteredCidrs := make([]string, 0)
if len(routes) > 0 {
filteredCidrs = append(filteredCidrs, routes)
} else {
for _, cidr := range cidrs {
isExcluded := false
for _, excludedIP := range excluded {
if cidr == excludedIP.Str {
isExcluded = true
break
}
}
if !isExcluded {
filteredCidrs = append(filteredCidrs, cidr)
}
}
}
rnd := rand.New(rand.NewSource(time.Now().UnixNano()))
ip = ""
if len(filteredCidrs) > 0 {
randomIndex := rnd.Intn(len(filteredCidrs))
selectedCIDR := filteredCidrs[randomIndex]
_, ipNet, err := net.ParseCIDR(selectedCIDR)
if err != nil {
logger.Error("ParseCIDR error", zap.Error(err))
return
}
cidr = selectedCIDR
startIP := ipNet.IP
endIP := make(net.IP, len(startIP))
copy(endIP, startIP)
for i := range startIP {
endIP[i] |= ^ipNet.Mask[i]
}
startIP[3] = 1
start = startIP.String()
endIP[3] = 254
end = endIP.String()
ipt := ipNet
ipt.IP[3] = 1
ip = ipt.IP.String()
return
} else {
logger.Error("No available CIDR found")
}
return
}