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client.go
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client.go
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package udp
import (
"fmt"
"net"
"strings"
log "github.com/colt3k/nglog/ng"
"github.com/colt3k/utils/netut"
)
type NetworkClient struct {
}
func NewClient() {
}
//Client create client for UDP
func (c *NetworkClient) Client(contype string, hostAr []string, proxy string) *[]netut.Host {
ip, err := netut.RetrieveIP()
if err != nil {
log.Logf(log.FATAL, "issue retrieving ip\n%+v", err)
}
hosts := make([]netut.Host, len(hostAr))
for i, d := range hostAr {
hostdata := strings.Split(d, ":")
if len(hostdata) > 1 {
hosts[i] = netut.Host{IP: hostdata[0], Port: hostdata[1]}
}
log.Logln(log.DBGL3, "")
log.Logln(log.DBGL3, "*********************** TEST ***********************")
log.Logln(log.DBGL3, "Resovling: ", d)
udpAdr, err := net.ResolveUDPAddr(contype, d)
log.Logln(log.DBGL3, "Resolved: ", d)
if err != nil {
log.Logf(log.ERROR, "failed to resolve address: %s on %s\n%+v", d, contype, err)
hosts[i].Pass = false
continue
}
con, err := net.DialUDP(contype, nil, udpAdr)
if err != nil {
log.Logf(log.ERROR, "Dial Failed on: %s\n%+v", d, err)
hosts[i].Pass = false
continue
}
if con != nil {
_, err = con.Write([]byte(fmt.Sprintf("Connection Test from:%s", ip)))
if err != nil {
log.Logf(log.ERROR, "Write to server %s failed.", d, err)
hosts[i].Pass = false
if con != nil {
err = con.Close()
if err != nil {
log.Logf(log.ERROR, "issue closing %+v", err)
}
}
continue
}
if con != nil {
err = con.Close()
if err != nil {
log.Logf(log.ERROR, "issue closing %+v", err)
}
}
} else {
log.Logln(log.ERROR, "Write to server: ", d, " failed.")
hosts[i].Pass = false
continue
}
reply := make([]byte, 1024)
repLen, err := con.Read(reply)
if err != nil {
log.Logf(log.ERROR, "write to server failed\n%+v", err)
hosts[i].Pass = false
if con != nil {
err = con.Close()
if err != nil {
log.Logf(log.ERROR, "issue closing %+v", err)
}
}
continue
}
log.Logln(log.DBGL3, "Reply from Server: ", d, " Response: ", string(reply[:repLen]))
hosts[i].Pass = true
}
return &hosts
}