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|
package main
import (
"bufio"
"fmt"
"os"
"time"
"iptcp/pkg/ipstack"
"strings"
)
// func SendUpdates() {
// myInterfaces := ipstack.GetInterfaces()
// myNeighbors := ipstack.GetNeighbors()
// for _, iface := range myInterfaces {
// // send RIP updates to all neighbors
// for _, _ = range myNeighbors {
// // iface.udp.Write(neighbor, data)
// // iface.RecvSocket.Write(neighbor, data)
// // wait for response for 12 seconds
// response := make([]byte, 512)
// iface.RecvSocket.Read(response)
// time.Sleep(12 * time.Second)
// if len(response) == 0 {
// // ipstack.RemoveNeighbor(neighbor)
// }
// }
// }
// time.Sleep(5 * time.Second)
// }
func main() {
if len(os.Args) != 2 {
fmt.Printf("Usage: %s <configFile>\n", os.Args[0])
os.Exit(1)
}
fileName := os.Args[1]
// initialize(fileName)
go ipstack.Initialize(fileName)
// myInterfaces := ipstack.GetInterfaces()
// myNeighbors := ipstack.GetNeighbors()
// myRoutes := ipstack.GetRoutes()
go func() {
for {
ipstack.SendUpdates()
time.Sleep(5 * time.Second)
}
}()
go ipstack.CheckAndUpdateRoutingTable()
scanner := bufio.NewScanner(os.Stdin)
for scanner.Scan() {
line := scanner.Text()
switch line {
case "li":
fmt.Println("Name\tAddr/Prefix\tState")
ipstack.SprintInterfaces()
case "ln":
fmt.Println("Iface\tVIP\tUDPAddr")
ipstack.SprintNeighbors()
case "lr":
fmt.Println("T\tPrefix\tNext Hop\tCost")
ipstack.SprintRoutingTable()
case "q":
ipstack.CleanUp()
os.Exit(0)
default:
if len(line) > 4 {
if line[:4] == "down" {
// get interface name
ifaceName := line[5:]
ipstack.InterfaceDownREPL(ifaceName)
}
if line[:4] == "send" {
// get IP address and message that follows it
listOfWords := strings.Split(line, " ")
ipAddr := listOfWords[1]
message := listOfWords[2:]
// combine message into one string
messageToSend := strings.Join(message, " ")
// convert message to byte array
messageToSendBytes := []byte(messageToSend)
// get interface by ipAddr
iface, err := ipstack.GetNeighborByIP(ipAddr)
if err != nil {
fmt.Println(err)
iface, err = ipstack.GetRouteByIP(ipAddr)
if err != nil {
fmt.Println(err)
continue
}
err = ipstack.SendIP(ipstack.GetMyVIP(), iface, 0, messageToSendBytes, ipAddr)
if err != nil {
fmt.Println(err)
continue
}
continue
}
err = ipstack.SendIP(ipstack.GetMyVIP(), iface, 0, messageToSendBytes, ipAddr)
if err != nil {
fmt.Println(err)
continue
}
}
}
if len(line) > 2 {
if line[:2] == "up" {
// get interface name
ifaceName := line[3:]
ipstack.InterfaceUpREPL(ifaceName)
}
}
continue
}
}
}
|
