added ipv4 validation

chatbot/chatbot.go

@@ -86,11 +86,11 @@ func (nkbot *NekoUKrovuBot) handleChat(ch *xmpp.Chat) {
 
 func (nkbot *NekoUKrovuBot) sanitizeInput(input string) bool {
 	if len(input) > 50 {
-		return false
+		return true
 	}
 
 	if !utf8.ValidString(input) {
-		return false
+		return true
 	}
 	
 	return true

ping/ping.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"net"
 	"os/exec"
+	"regexp"
 	"sync"
 )
 
@@ -56,7 +57,16 @@ func getNetworkPrefix(ip net.IP) string {
 	return fmt.Sprintf("%d.%d.%d.0", ip[0], ip[1], ip[2])
 }
 
+func isValidIPv4(ip string) bool {
+	ipv4Regex := `^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$`
+	re := regexp.MustCompile(ipv4Regex)
+	return re.MatchString(ip)
+}
+
 func ping(ip string) bool {
+	if !isValidIPv4(ip) {
+		return false
+	}
 	output, err := exec.Command("ping", "-c", "1", "-W", "1", ip).CombinedOutput()
 
 	if err != nil {

ping/ping_test.go

@@ -0,0 +1,25 @@
+package ping
+
+import "testing"
+
+func Test_isValidIPv4(t *testing.T) {
+	type args struct {
+		ip string
+	}
+	tests := []struct {
+		name string
+		args args
+		want bool
+	}{
+		{name: "1", args: args{ip: "192.168.1.1"}, want: true},
+		{name: "2", args: args{ip: "192.168.277.1"}, want: false},
+		{name: "3", args: args{ip: "kurac palac"}, want: false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := isValidIPv4(tt.args.ip); got != tt.want {
+				t.Errorf("isValidIPv4() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}