Golang: Undefined field in struct error

I am trying to parse an xml file using golang. I have created my structs needed but when I try to compile the go file, I get an error saying the following:

./main_v4.go:146: aggInfoXml.IpAddr.Hports undefined (type []Addr has no field or method Hports)

I am stumped on this problem. Here is my code:

package main
import(
"net/http"
"html/template"
"os/exec"
"io/ioutil"
"os"
"encoding/xml"
"encoding/json"
"fmt"
"bufio"
"github.com/gorilla/websocket"
"time"
"log"
)
type PercentInfo struct {
Percent IntPercent `xml:"taskprogress,omitempty"`
} 
type AggInfoXml struct {
Percent     IntPercent  `xml:"taskprogress,omitempty"`
IpAddr      []Addr      `xml:"host>address,omitempty"`
}
type IntPercent struct {
Value float64 `xml:"percent,attr,omitempty"` // works
}
type Addr struct {
Ip      string   `xml:"addr,attr"`
Hports  []Ports  `xml:"host>ports>port,omitempty"` //failing to be recognized
}
type Ports struct {
Port string `xml:"portid,attr"`
}
func (p *Addr) ipaddr() string {
return p.Ip
}
func (p *Ports) ports() string {
return p.Port
}
func (p *IntPercent) percent() float64 {
return p.Value
}
func (f *Test) Name() string {
return f.Value
}
var upgrader = websocket.Upgrader{
ReadBufferSize: 1024,
WriteBufferSize: 1024,
}
type Test struct {
Value string    
}
func wsHandler(w http.ResponseWriter, r *http.Request) {
conn, err := upgrader.Upgrade(w, r, nil)
if err != nil {
fmt.Println(err)
}
cmd := exec.Command("nmap", "-F", "-sS", "172.16.2.0/24", "-oX", "output.xml", "--stats-every", "1s")
if err := cmd.Start(); err != nil {
log.Fatal(err)
}
time.Sleep( 1000 * time.Millisecond) 
fp, err := os.Open("output.xml")
if err != nil {
log.Fatal(err)
}
// create scanner on the output.xml file
in := bufio.NewScanner(fp)
// change this loop to buffer read the xml file...
aggInfoXml  := AggInfoXml{}
fmt.Printf("hello")
for in.Scan() {
err = xml.Unmarshal([]byte(in.Text()), &aggInfoXml.Percent) 
if err != nil {
fmt.Printf("Could not unmarshal the line <%v>", in.Text())
} else {
fmt.Printf("%+v\n", aggInfoXml.Percent.Value)
}
// bail out of slow loop if 100% reached
if aggInfoXml.Percent.Value == 100 {
break
}
time.Sleep(1000*time.Millisecond)
bytesArray, err := json.Marshal(aggInfoXml.Percent)
err = conn.WriteMessage(websocket.TextMessage, bytesArray)  // send JSON over
if err != nil {
panic(err)
}
}//this is the end of the in.Scan loop now
fmt.Println("After loop")
if err := cmd.Wait(); err != nil {  
log.Fatal(err)
}
data, err := ioutil.ReadFile("output.xml")
if err != nil {
panic(err)
}
err = xml.Unmarshal(data, &aggInfoXml.IpAddr)
if err != nil {
log.Fatal("Could not unmarshal host")
}
for _, port := range aggInfoXml.IpAddr.Hports {
fmt.Printf("Port: %s\n", port.ports())
}
for _, ip := range aggInfoXml.IpAddr {
fmt.Printf("IpAdd: %s\n", ip.ipaddr())
}
conn.Close()
fp.Close()
}
func handler(w http.ResponseWriter, r *http.Request) {
t, _ := template.ParseFiles("index.html")
t.Execute(w,nil)
}
func main() {
http.HandleFunc("/", handler)
http.Handle("/layout/", http.StripPrefix("/layout/", http.FileServer(http.Dir("layout"))))
http.HandleFunc("/websocket", wsHandler)
http.ListenAndServe(":8080", nil) 
}

Any suggestions would be helpful.

type AggInfoXml struct {
Percent     IntPercent  `xml:"taskprogress,omitempty"`
IpAddr      []Addr      `xml:"host>address,omitempty"`
}
type Addr struct {
Ip      string   `xml:"addr,attr"`
Hports  []Ports  `xml:"host>ports>port,omitempty"` //failing to be recognized
}

IpAddr is an Array. It has no attribute called Hports. You will have to refer one of the elements of that array like this.

aggInfoXml.IpAddr[0].Hports 

but if you want to access port of Hports, then you will have to do this.

aggInfoXml.IpAddr[0].Hports[0] 

I have upvoted the answer from Prajwal as it points to the problem, but actually, in your code it seems you should be replacing your for loops with something like this:

for _, ip := range aggInfoXml.IpAddr {
fmt.Printf("IpAdd: %s\n", ip.ipaddr())
for _, port := range ip.Hports {
fmt.Printf("Port: %s\n", port.ports())
}
}