From 5d7ffd42b638f33d32c01c46f853e26a5028b552 Mon Sep 17 00:00:00 2001
From: David Doan <daviddoan@Davids-MacBook-Pro-70.local>
Date: Thu, 2 Nov 2023 18:57:56 -0400
Subject: milestone 1

---
 cmd/vhost/main.go | 128 ++++++++++++++++++++++++++++++++++--------------------
 1 file changed, 81 insertions(+), 47 deletions(-)

(limited to 'cmd/vhost/main.go')

diff --git a/cmd/vhost/main.go b/cmd/vhost/main.go
index c0e5ad8..57f5f7c 100644
--- a/cmd/vhost/main.go
+++ b/cmd/vhost/main.go
@@ -4,9 +4,11 @@ import (
 	"bufio"
 	"fmt"
 	"iptcp/pkg/ipstack"
+	// "iptcp/pkg/tcpstack"
 	"net/netip"
 	"os"
 	"strings"
+	"strconv"
 )
 
 func main() {
@@ -22,12 +24,13 @@ func main() {
 		return
 	}
 	ipstack.RegisterProtocolHandler(ipstack.TEST_PROTOCOL)
-
+	ipstack.RegisterProtocolHandler(ipstack.TCP_PROTOCOL)
 	scanner := bufio.NewScanner(os.Stdin)
 
 	for scanner.Scan() {
 		line := scanner.Text()
-		switch line {
+		tokens := strings.Split(line, " ")
+		switch tokens[0] {
 		case "li":
 			fmt.Println("Name\tAddr/Prefix\tState")
 			fmt.Println(ipstack.SprintInterfaces())
@@ -43,59 +46,90 @@ func main() {
 		case "exit":
 			ipstack.CleanUp()
 			os.Exit(0)
-		default:
-			if len(line) > 4 {
-				if line[:4] == "down" {
-					ifaceName := line[5:]
-					ipstack.InterfaceDownREPL(ifaceName)
-				}
+		case "down":
+			// get interface name
+			ifaceName := tokens[1]
+			ipstack.InterfaceDownREPL(ifaceName)
+		case "up":
+			// get interface name
+			ifaceName := tokens[1]
+			ipstack.InterfaceUpREPL(ifaceName)
+		case "send":
+			// get IP address and message that follows it
+			IPAndMessage := strings.Split(line, " ")
+			ipAddr := IPAndMessage[1]
+			message := IPAndMessage[2:]
 
-				if line[:4] == "send" {
-					// get IP address and message that follows it
-					IPAndMessage := strings.Split(line, " ")
-					ipAddr := IPAndMessage[1]
-					message := IPAndMessage[2:]
+			// combine message into one string
+			messageToSend := strings.Join(message, " ")
+			messageToSendBytes := []byte(messageToSend)
 
-					// combine message into one string
-					messageToSend := strings.Join(message, " ")
-					messageToSendBytes := []byte(messageToSend)
-
-					address, _ := netip.ParseAddr(ipAddr)
-					hop, err := ipstack.Route(address)
+			address, _ := netip.ParseAddr(ipAddr)
+			hop, err := ipstack.Route(address)
+			if err != nil {
+				fmt.Println(err)
+				continue
+			}
+			myAddr := hop.Interface.IpPrefix.Addr()
+			for _, neighbor := range ipstack.GetNeighbors()[hop.Interface.Name] {
+				if neighbor.VipAddr == address ||
+					neighbor.VipAddr == hop.VIP && hop.Type == "S" {
+					bytesWritten, err := ipstack.SendIP(&myAddr, neighbor, ipstack.TEST_PROTOCOL, messageToSendBytes, ipAddr, nil)
+					fmt.Printf("Sent %d bytes to %s\n", bytesWritten, neighbor.VipAddr.String())
 					if err != nil {
 						fmt.Println(err)
-						continue
-					}
-					myAddr := hop.Interface.IpPrefix.Addr()
-					for _, neighbor := range ipstack.GetNeighbors()[hop.Interface.Name] {
-						if neighbor.VipAddr == address ||
-							neighbor.VipAddr == hop.VIP && hop.Type == "S" {
-							bytesWritten, err := ipstack.SendIP(&myAddr, neighbor, ipstack.TEST_PROTOCOL, messageToSendBytes, ipAddr, nil)
-							fmt.Printf("Sent %d bytes to %s\n", bytesWritten, neighbor.VipAddr.String())
-							if err != nil {
-								fmt.Println(err)
-							}
-						}
 					}
 				}
 			}
-			if len(line) > 2 {
-				if line[:2] == "up" {
-					// get interface name
-					ifaceName := line[3:]
-					ipstack.InterfaceUpREPL(ifaceName)
-				}
-			} else {
-				fmt.Println("Invalid command: ", line)
-				fmt.Println("Commands: ")
-				fmt.Println("  exit Terminate this program")
-				fmt.Println("    li List interfaces")
-				fmt.Println("    lr List routes")
-				fmt.Println("    ln List available neighbors")
-				fmt.Println("    up Enable an interface")
-				fmt.Println("  down Disable an interface")
-				fmt.Println("  send Send test packet")
+// ********************************************TCP REPL***************************************************************
+		case "a":
+			// accept a connection
+			// get the port number
+			port := line[2:]
+			uint16Port, err := strconv.ParseUint(port, 10, 16)
+			if err != nil {
+				fmt.Println(err)
+				continue
+			}
+			// listen on the port
+			listener, err := ipstack.VListen(uint16(uint16Port))
+			if err != nil {
+				fmt.Println(err)
+				continue
+			}
+			_, err = listener.VAccept()
+			if err != nil {
+				fmt.Println(err)
+				continue
 			}
+		case "c":
+			// connect to a port
+			vipAddr := tokens[1]
+			port := tokens[2]
+			uint16Port, err := strconv.ParseUint(port, 10, 16)
+			if err != nil {
+				fmt.Println(err)
+				continue
+			}
+			_, err = ipstack.VConnect(vipAddr, uint16(uint16Port))
+			if err != nil {
+				fmt.Println(err)
+				continue
+			}
+		case "ls":
+			// list sockets
+			fmt.Println("SID\tLAddr\t\tLPort\tRAddr\t\tRPort\tRStatus")
+			fmt.Println(ipstack.SprintSockets())
+		default:
+			fmt.Println("Invalid command: ", line)
+			fmt.Println("Commands: ")
+			fmt.Println("  exit Terminate this program")
+			fmt.Println("    li List interfaces")
+			fmt.Println("    lr List routes")
+			fmt.Println("    ln List available neighbors")
+			fmt.Println("    up Enable an interface")
+			fmt.Println("  down Disable an interface")
+			fmt.Println("  send Send test packet")
 			continue
 		}
 	}
-- 
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