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@@ -0,0 +1,95 @@
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+package main
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+
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+import (
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+ "fmt"
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+ "html/template"
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+ "net"
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+ "net/http"
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+ "strings"
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+)
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+
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+var tpl = template.Must(template.ParseFiles("biba.html"))
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+
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+type IPv4 struct {
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+ IpAddress string
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+ NetMask string
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+ DefGateway string
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+ MainDNS string
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+ AltDNS string
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+}
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+
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+func main() {
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+
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+ mux := http.NewServeMux()
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+ mux.HandleFunc("/info", info)
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+ mux.HandleFunc("/error", err)
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+ mux.HandleFunc("/", indexHandler)
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+ http.ListenAndServe(":8080", mux)
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+
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+}
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+func err(w http.ResponseWriter, r *http.Request) {
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+ fmt.Fprintf(w, "Давай назад!")
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+}
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+func info(w http.ResponseWriter, r *http.Request) {
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+ IP_Address := r.FormValue("IP_Address")
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+ NET_Mask := r.FormValue("NET_Mask")
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+ Def_gateway := r.FormValue("Def_gateway")
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+ Main_DNS := r.FormValue("Main_DNS")
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+ Alt_DNS := r.FormValue("Alt_DNS")
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+ if IP_Address == "" || NET_Mask == "" {
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+
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+ http.Redirect(w, r, "/error", http.StatusSeeOther)
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+
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+ }
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+ if !valid(IP_Address) || !valid(NET_Mask) || !valid(Def_gateway) || !valid(Main_DNS) || !valid(Alt_DNS) {
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+ http.Redirect(w, r, "/error", http.StatusSeeOther)
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+ }
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+
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+ if !validMask(NET_Mask) {
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+ http.Redirect(w, r, "/error", http.StatusSeeOther)
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+ }
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+
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+ info := IPv4{IpAddress: IP_Address, NetMask: NET_Mask, DefGateway: Def_gateway, MainDNS: Main_DNS, AltDNS: Alt_DNS}
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+
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+ fmt.Fprintf(w, info.GetAllInfo())
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+
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+}
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+
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+func (ip IPv4) GetAllInfo() string {
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+
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+ return fmt.Sprintf("IP Address: %s \nNet Mask: %s \nDefault Gateway: %s \nDNS-Server: %s \nAlternative DNS-Server: %s", ip.IpAddress, ip.NetMask, ip.DefGateway, ip.MainDNS, ip.AltDNS)
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+
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+}
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+
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+func indexHandler(w http.ResponseWriter, r *http.Request) {
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+
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+ tpl.Execute(w, nil)
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+}
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+
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+func valid(ip string) bool {
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+
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+ Ipv4Addr := net.ParseIP(ip)
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+ if Ipv4Addr == nil {
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+ return false
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+ }
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+ return true
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+
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+}
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+
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+func validMask(mask string) bool {
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+ count := 0
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+ s := strings.Split(mask, ".")
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+ fmt.Println("mask: ", s)
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+ for i := 0; i < len(s)-1; i++ {
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+ if s[i] == "255" {
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+ count++
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+ }
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+
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+ }
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+
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+ if count == 3 && (s[len(s)-1] == "0" || s[len(s)-1] == "128" || s[len(s)-1] == "192" || s[len(s)-1] == "224" || s[len(s)-1] == "240" || s[len(s)-1] == "248" || s[len(s)-1] == "254" || s[len(s)-1] == "255") {
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+ return true
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+ }
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+ return false
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+
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+}
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Алексей