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|
package ipstack
import (
"fmt"
ipv4header "github.com/brown-csci1680/iptcp-headers"
"net"
"net/netip"
"testing"
"time"
)
func TestInitialize(t *testing.T) {
lnxFilePath := "../../doc-example/r2.lnx"
err := Initialize(lnxFilePath)
if err != nil {
t.Error(err)
}
fmt.Printf("Interfaces:\n%s\n\n", SprintInterfaces())
fmt.Printf("Neighbors:\n%s\n", SprintNeighbors())
fmt.Printf("RoutingTable:\n%s\n", SprintRoutingTable())
fmt.Println("TestInitialize successful")
t.Cleanup(func() { CleanUp() })
}
func TestInterfaceUpThenDown(t *testing.T) {
lnxFilePath := "../../doc-example/r2.lnx"
err := Initialize(lnxFilePath)
if err != nil {
t.Error(err)
}
iface, err := GetInterfaceByName("if0")
if err != nil {
t.Error(err)
}
InterfaceUp(iface)
if iface.State == false {
t.Error("iface state should be true")
}
fmt.Printf("Interfaces:\n%s\n", SprintInterfaces())
time.Sleep(5 * time.Millisecond) // allow time to print
InterfaceDown(iface)
if iface.State == true {
t.Error("iface state should be false")
}
time.Sleep(5 * time.Millisecond) // allow time to print
fmt.Printf("Interfaces:\n%s\n", SprintInterfaces())
fmt.Println("TestInterfaceUpThenDown successful")
t.Cleanup(func() { CleanUp() })
}
func TestInterfaceUpThenDownTwice(t *testing.T) {
lnxFilePath := "../../doc-example/r2.lnx"
err := Initialize(lnxFilePath)
if err != nil {
t.Error(err)
}
iface, err := GetInterfaceByName("if0")
if err != nil {
t.Error(err)
}
InterfaceUp(iface)
if iface.State == false {
t.Error("iface state should be true")
}
fmt.Printf("Interfaces:\n%s\n", SprintInterfaces())
time.Sleep(5 * time.Millisecond) // allow time to print
fmt.Println("putting interface down")
InterfaceDown(iface)
if iface.State == true {
t.Error("iface state should be false")
}
time.Sleep(3 * time.Millisecond)
fmt.Println("putting interface back up for 3 iterations")
InterfaceUp(iface)
if iface.State == false {
t.Error("iface state should be true")
}
time.Sleep(3 * time.Millisecond) // allow time to print
fmt.Println("putting interface down")
InterfaceDown(iface)
if iface.State == true {
t.Error("iface state should be false")
}
time.Sleep(5 * time.Millisecond) // allow time to print
fmt.Printf("Interfaces:\n%s\n", SprintInterfaces())
fmt.Println("TestInterfaceUpThenDownTwice successful")
t.Cleanup(func() { CleanUp() })
}
func TestSendIPToNeighbor(t *testing.T) {
lnxFilePath := "../../doc-example/r2.lnx"
err := Initialize(lnxFilePath)
if err != nil {
t.Error(err)
}
// get the first neighbor of this interface
iface, err := GetInterfaceByName("if0")
if err != nil {
t.Error(err)
}
neighbors, err := GetNeighborsToInterface("if0")
if err != nil {
t.Error(err)
}
// setup a neighbor listener socket
testNeighbor := neighbors[0]
// close the socket so we can listen on it
err = testNeighbor.SendSocket.Close()
if err != nil {
t.Error(err)
}
fmt.Printf("Interfaces:\n%s\n", SprintInterfaces())
fmt.Printf("Neighbors:\n%s\n", SprintNeighbors())
listenString := testNeighbor.UdpAddr.String()
fmt.Println("listening on " + listenString)
listenAddr, err := net.ResolveUDPAddr("udp4", listenString)
if err != nil {
t.Error(err)
}
recvSocket, err := net.ListenUDP("udp4", listenAddr)
if err != nil {
t.Error(err)
}
testNeighbor.SendSocket = *recvSocket
sent := false
go func() {
buffer := make([]byte, MAX_IP_PACKET_SIZE)
fmt.Println("wating to read from UDP socket")
_, sourceAddr, err := recvSocket.ReadFromUDP(buffer)
if err != nil {
t.Error(err)
}
fmt.Println("read from UDP socket")
hdr, err := ipv4header.ParseHeader(buffer)
if err != nil {
t.Error(err)
}
headerSize := hdr.Len
headerBytes := buffer[:headerSize]
checksumFromHeader := uint16(hdr.Checksum)
computedChecksum := ValidateChecksum(headerBytes, checksumFromHeader)
var checksumState string
if computedChecksum == checksumFromHeader {
checksumState = "OK"
} else {
checksumState = "FAIL"
}
message := buffer[headerSize:]
fmt.Printf("Received IP packet from %s\nHeader: %v\nChecksum: %s\nMessage: %s\n",
sourceAddr.String(), hdr, checksumState, string(message))
if err != nil {
t.Error(err)
}
sent = true
}()
time.Sleep(10 * time.Millisecond)
// send a message to the neighbor
fmt.Printf("sending message to neighbor\t%t\n", sent)
err = SendIP(*iface, *testNeighbor, 0, []byte("You are my firest neighbor!"))
if err != nil {
t.Error(err)
}
fmt.Printf("SENT message to neighbor\t%t\n", sent)
// give a little time for the message to be sent
time.Sleep(1000 * time.Millisecond)
if !sent {
t.Error("Message not sent")
t.Fail()
}
fmt.Println("TestSendIPToNeighbor successful")
t.Cleanup(func() { CleanUp() })
}
func TestRecvIP(t *testing.T) {
lnxFilePath := "../../doc-example/r2.lnx"
err := Initialize(lnxFilePath)
if err != nil {
t.Error(err)
}
// get the first neighbor of this interface to RecvIP from
iface, err := GetInterfaceByName("if0")
if err != nil {
t.Error(err)
}
InterfaceUp(iface)
// setup a random socket to send an ip packet from
listenAddr, err := net.ResolveUDPAddr("udp4", "127.0.0.1:6969")
sendSocket, err := net.ListenUDP("udp4", listenAddr)
// send a message to the neighbor
ifaceAsNeighbor := Neighbor{
VipAddr: iface.IpPrefix.Addr(),
UdpAddr: iface.UdpAddr,
SendSocket: iface.RecvSocket,
SocketChannel: iface.SocketChannel,
}
fakeIface := Interface{
Name: "if69",
IpPrefix: netip.MustParsePrefix("10.69.0.1/24"),
UdpAddr: netip.MustParseAddrPort("127.0.0.1:6969"),
RecvSocket: net.UDPConn{},
SocketChannel: nil,
State: true,
}
err = SendIP(fakeIface, ifaceAsNeighbor, 0, []byte("hello"))
if err != nil {
return
}
time.Sleep(10 * time.Millisecond)
// TODO: potenially make this a channel, so it actually checks values.
// For now, you must read the message from the console.
err = sendSocket.Close()
if err != nil {
t.Error(err)
}
t.Cleanup(func() { CleanUp() })
}
|
