mirror of
https://github.com/gravitl/netmaker.git
synced 2024-09-20 23:36:18 +08:00
81 lines
1.7 KiB
Go
81 lines
1.7 KiB
Go
package controller
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import (
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"fmt"
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"net"
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"net/http"
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"strings"
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"github.com/gorilla/mux"
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"github.com/gravitl/netmaker/netclient/ncutils"
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)
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func ipHandlers(r *mux.Router) {
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r.HandleFunc("/api/getip", http.HandlerFunc(getPublicIP)).Methods(http.MethodGet)
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}
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// swagger:route GET /api/getip ipservice getPublicIP
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//
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// Get the current public IP address.
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//
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// Schemes: https
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//
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// Security:
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// oauth
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//
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// Responses:
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// 200: byteArrayResponse
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func getPublicIP(w http.ResponseWriter, r *http.Request) {
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r.Header.Set("Connection", "close")
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ip, err := parseIP(r)
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if err != nil {
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w.WriteHeader(400)
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switch {
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case ip != "":
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_, _ = w.Write([]byte("ip is invalid: " + ip))
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case ip == "":
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_, _ = w.Write([]byte("no ip found"))
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default:
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fmt.Println(err)
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}
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return
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}
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w.WriteHeader(200)
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_, _ = w.Write([]byte(ip))
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}
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func parseIP(r *http.Request) (string, error) {
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// Get Public IP from header
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ip := r.Header.Get("X-REAL-IP")
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ipnet := net.ParseIP(ip)
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if ipnet != nil && !ncutils.IpIsPrivate(ipnet) {
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return ip, nil
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}
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// If above fails, get Public IP from other header instead
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forwardips := r.Header.Get("X-FORWARDED-FOR")
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iplist := strings.Split(forwardips, ",")
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for _, ip := range iplist {
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ipnet := net.ParseIP(ip)
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if ipnet != nil && !ncutils.IpIsPrivate(ipnet) {
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return ip, nil
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}
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}
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// If above also fails, get Public IP from Remote Address of request
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ip, _, err := net.SplitHostPort(r.RemoteAddr)
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if err != nil {
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return "", err
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}
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ipnet = net.ParseIP(ip)
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if ipnet != nil {
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if ncutils.IpIsPrivate(ipnet) {
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return ip, fmt.Errorf("ip is a private address")
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}
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return ip, nil
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}
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return "", fmt.Errorf("no ip found")
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}
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