func main() {
// By default, Go seeds its RNG with 1. This would cause every program to
// generate the same sequence of IDs. Use the current nano time to
// random numbers
rand.Seed(time.Now().UnixNano())
// Get the bind and connect connection strings from command-line arguments.
flag.Parse()
args := flag.Args()
if len(args) != 2 {
log.Fatal("Must be invoked with exactly two arguments!\n")
}
listenStr := args[0]
firstPeerStr := args[1]
// Create the Kademlia instance
fmt.Printf("kademlia starting up!\n")
kadem := kademlia.NewKademlia(listenStr)
// Confirm our server is up with a PING request and then exit.
// Your code should loop forever, reading instructions from stdin and
// printing their results to stdout. See README.txt for more details.
_, port, _ := net.SplitHostPort(firstPeerStr)
client, err := rpc.DialHTTPPath("tcp", firstPeerStr, rpc.DefaultRPCPath+port)
if err != nil {
log.Fatal("DialHTTP: ", err)
}
ping := new(kademlia.PingMessage)
ping.MsgID = kademlia.NewRandomID()
ping.Sender = kadem.Routes.SelfContact
var pong kademlia.PongMessage
err = client.Call("KademliaCore.Ping", ping, &pong)
if err != nil {
log.Fatal("Call: ", err)
}
log.Printf("ping msgID: %s\n", ping.MsgID.AsString())
log.Printf("pong msgID: %s\n", pong.MsgID.AsString())
kadem.Routes.Update(&pong.Sender)
in := bufio.NewReader(os.Stdin)
quit := false
for !quit {
line, err := in.ReadString('\n')
if err != nil {
log.Fatal(err)
}
line = strings.TrimSpace(line)
if line == "" {
continue
}
resp := executeLine(kadem, line)
if resp == "quit" {
quit = true
} else if resp != "" {
fmt.Printf("%v\n", resp)
}
}
}
func main() {
// By default, Go seeds its RNG with 1. This would cause every program to
// generate the same sequence of IDs.
rand.Seed(time.Now().UnixNano())
// Get the bind and connect connection strings from command-line arguments.
flag.Parse()
args := flag.Args()
if len(args) != 2 {
log.Fatal("Must be invoked with exactly two arguments!\n")
}
firstPeerStr := args[1]
/*
kadem := kademlia.NewKademlia(listenStr)
rpc.Register(kadem)
rpc.HandleHTTP()
l, err := net.Listen("tcp", listenStr)
if err != nil {
log.Fatal("Listen: ", err)
}
// Serve forever.
http.Serve(l, nil)
*/
// Confirm our server is up with a PING request and then exit.
// Your code should loop forever, reading instructions from stdin and
// printing their results to stdout. See README.txt for more details.
client, err := rpc.DialHTTP("tcp", firstPeerStr)
if err != nil {
log.Fatal("DialHTTP: ", err)
}
ping := new(kademlia.Ping)
ping.MsgID = kademlia.NewRandomID()
ping.Sender = kademlia.SenderDetails(firstPeerStr)
var pong kademlia.Pong
err = client.Call("Kademlia.Ping", ping, &pong)
if err != nil {
log.Fatal("Call: ", err)
}
log.Printf("ping msgID: %s %s\n", ping.MsgID.AsString(), ping.Sender.AsString())
log.Printf("pong msgID: %s\n", pong.MsgID.AsString())
}
func doPing(kadem *kademlia.Kademlia, con kademlia.Contact, addressOrId string) {
var pingAddress string
if len(strings.Split(addressOrId, string(":"))) == 2 {
pingAddress = addressOrId
} else {
id, err := kademlia.FromString(addressOrId)
if err != nil {
fmt.Printf("ERR could not interpret nodeid as ID")
return
}
con, err := kadem.ContactFromID(id)
if err != nil {
fmt.Println("ERR : unknown node")
return
}
pingAddress = contactToAddrString(con)
}
client, err := rpc.DialHTTP("tcp", pingAddress)
if err != nil {
log.Fatal("DialHTTP: ", err)
}
ping := kademlia.Ping{Sender: con}
ping.MsgID = kademlia.NewRandomID()
var pong kademlia.Pong
err = client.Call("Kademlia.Ping", ping, &pong)
if err != nil {
log.Fatal("Call: ", err)
}
if ping.MsgID.Equals(pong.MsgID) {
fmt.Print("OK\n")
} else {
fmt.Print("ERR : response message id does not match\n")
}
_ = client.Close()
}
func main() {
// By default, Go seeds its RNG with 1. This would cause every program to
// generate the same sequence of IDs.
rand.Seed(time.Now().UnixNano())
// Get the bind and connect connection strings from command-line arguments.
flag.Parse()
args := flag.Args()
if len(args) != 2 {
log.Fatal("Must be invoked with exactly two arguments!\n")
}
listenStr := args[0]
firstPeerStr := args[1]
fmt.Printf("kademlia starting up!\n")
kadem := kademlia.NewKademlia()
tcpAddr, err := net.ResolveTCPAddr("tcp4", args[0])
kadem.MyContact.Host = tcpAddr.IP
kadem.MyContact.Port = uint16(tcpAddr.Port)
rpc.Register(kadem)
rpc.HandleHTTP()
l, err := net.Listen("tcp", listenStr)
if err != nil {
log.Fatal("Listen: ", err)
}
// Serve forever.
go http.Serve(l, nil)
// Confirm our server is up with a PING request and then exit.
// Your code should loop forever, reading instructions from stdin and
// printing their results to stdout. See README.txt for more details.
client, err := rpc.DialHTTP("tcp", firstPeerStr)
if err != nil {
log.Fatal("DialHTTP: ", err)
}
ping := new(kademlia.Ping)
ping.MsgID = kademlia.NewRandomID()
var pong kademlia.Pong
err = client.Call("Kademlia.Ping", ping, &pong)
if err != nil {
log.Fatal("Call: ", err)
}
//log.Printf("ping msgID: %s\n", ping.MsgID.AsString())
// log.Printf("pong msgID: %s\n", pong.MsgID.AsString())
tcpAdd, err := net.ResolveTCPAddr("tcp4", args[1])
host := tcpAdd.IP
port := uint16(tcpAdd.Port)
//fmt.Println(pong.Sender)
nodeID := pong.Sender.NodeID
cont := kademlia.Contact{nodeID, host, port}
kademlia.Join(kadem, cont)
for true {
var command, arg1, arg2, arg3 string
fmt.Scanf("%s", &command, "\n")
//fmt.Print("command:", command)
switch command {
case "whoami":
//Print your node ID
kademlia.WhoAmI(kadem)
case "local_find_value":
//If your node has data for the given key, print it.
//If your node does not have data for the given key, you should print "ERR".
fmt.Scanf("%s", &arg1)
key := arg1
kademlia.LocalFindValue(kadem, key)
case "get_contact":
//If your buckets contain a node with the given ID, printf("%v %v\n",theNode.addr,theNode.port)
//If your buckers do not contain any such node, print "ERR".
fmt.Scanf("%s", &arg1)
ID := arg1
//fmt.Println(ID)
kademlia.GetContact(kadem, ID)
case "iterativeStore":
//Perform the iterativeStore operation and then print the ID of the node that received the final STORE operation.
fmt.Scanf("%s %s", &arg1, &arg2)
key := arg1
keyId, err := kademlia.FromString(key)
if err != nil {
}
value := arg2
//fmt.Println(key,value)
storereq := kademlia.StoreRequest{}
var kclosenodes *list.List
storereq.Sender = kadem.MyContact
storereq.MsgID = kademlia.NewRandomID()
storereq.Key = keyId
storereq.Value = []byte(value)
kadem.IterativeStore(storereq, kclosenodes)
case "iterativeFindNode":
//Print a list of ≤ k closest nodes and print their IDs. You should collect the IDs in a slice and print that.
fmt.Scanf("%s", &arg1)
ID := arg1
//fmt.Println(ID)
ID2, err := kademlia.FromString(ID)
if err != nil {
}
//kadem.IterativeFindNode(ID2, false)
case "iterativeFindValue":
//printf("%v %v\n" ID, value), where ID refers to the node that finally returned the value. If you do not find a value, print "ERR".
fmt.Scanf("%s", &arg1)
key := arg1
//fmt.Println(key)
keyId, err := kademlia.FromString(key)
if err != nil {
}
findvalueresult := kademlia.FindValueResult{}
kadem.IterativeFindValue(keyId, &findvalueresult)
case "ping":
fmt.Scanf("%s", &arg1)
nodeID := arg1
//fmt.Println(nodeID)
if strings.ContainsAny(nodeID, ":") {
client, err := rpc.DialHTTP("tcp", arg1)
if err != nil {
log.Fatal("DialHTTP: ", err)
}
ping := new(kademlia.Ping)
ping.MsgID = kademlia.NewRandomID()
var pong kademlia.Pong
err = client.Call("Kademlia.Ping", ping, &pong)
if err != nil {
log.Fatal("Call: ", err)
fmt.Println("Err")
continue
}
tcpAdd, err := net.ResolveTCPAddr("tcp4", arg1)
host := tcpAdd.IP
port := uint16(tcpAdd.Port)
//fmt.Println(pong.Sender)
nodeID := pong.Sender.NodeID
cont := kademlia.Contact{nodeID, host, port}
kademlia.Update(kadem, &cont)
fmt.Println("Ping success")
continue
}
isPing := kademlia.CallPings(kadem, nodeID)
if isPing != true {
fmt.Println("Error in Ping")
}
case "store":
//Perform a store and print a blank line.
fmt.Scanf("%s %s", &arg1, &arg2)
nodeID := arg1
key := arg2
r := bufio.NewReader(os.Stdin)
arg3, err = r.ReadString(10)
//fmt.Fscanln(r, &arg3)
//arg3 = bufio.ReadString('\n')
value := arg3
//fmt.Println("ID: ", nodeID, "key: ", key, "value", value)
isStored := kademlia.CallStore(kadem, nodeID, key, value)
if isStored != true {
fmt.Println("Error in Store")
}
case "find_node":
//Perform a find_node and print its results as for iterativeFindNode.
fmt.Scanf("%s %s", &arg1, &arg2)
nodeID := arg1
key := arg2
//fmt.Println(nodeID, key)
isFound := kademlia.CallFindNode(kadem, nodeID, key)
if isFound != true {
fmt.Println("Error in finding")
}
case "find_value":
//Perform a find_value. If it returns nodes, print them as for find_node. If it returns a value, print the value as in iterativeFindValue.
fmt.Scanf("%s %s", &arg1, &arg2)
nodeID := arg1
key := arg2
//fmt.Println(nodeID, key)
isFound := kademlia.CallFindValue(kadem, nodeID, key)
if isFound != true {
fmt.Println("UnSuccessful ")
}
break
case "exit":
break
}
if command == "exit" {
break
}
}
}
func main() {
// By default, Go seeds its RNG with 1. This would cause every program to
// generate the same sequence of IDs.
// rand.seed()
rand.Seed(time.Now().UnixNano())
// Get the bind and connect connection strings from command-line arguments.
flag.Parse()
args := flag.Args()
if len(args) != 2 {
log.Fatal("Must be invoked with exactly two arguments!\n")
}
listenStr := args[0]
firstPeerStr := args[1]
fmt.Printf("kademlia starting up!\n")
kadem := kademlia.NewKademlia()
//------------------------------------
// fmt.Println(kadem.NodeID)
// myNodeID := kadem.WhoAmI()
// fmt.Println(myNodeID)
//------------------------------------
//-----initializing MyContact---------
addr, err := net.ResolveTCPAddr("tcp4", listenStr)
if err != nil {
log.Fatal("Call: ", err)
}
host1 := addr.IP
port1 := uint16(addr.Port)
kadem.MyContact.NodeID = kademlia.WhoAmI(kadem)
kadem.MyContact.Host = host1
kadem.MyContact.Port = port1
//puttin Mycontact in the bucket
kadem.KademBuckets.Update_Contact(kadem.MyContact, kadem.MyContact)
//-----registering kadem object and it's functionalities----------
rpc.Register(kadem)
rpc.HandleHTTP()
l, err := net.Listen("tcp", listenStr) //telling the server is ON
if err != nil {
log.Fatal("Listen: ", err)
}
//---------------------------------------------------------------
// Serve forever.
go http.Serve(l, nil)
//---------------------------------------------------------------
// Confirm our server is up with a PING request and then exit.
// Your code should loop forever, reading instructions from stdin and
// printing their results to stdout. See README.txt for more details.
client, err := rpc.DialHTTP("tcp", firstPeerStr)
if err != nil {
log.Fatal("DialHTTP: ", err)
}
addr1, err := net.ResolveTCPAddr("tcp4", firstPeerStr)
if err != nil {
log.Fatal("Call: ", err)
}
host2 := addr1.IP
ping := new(kademlia.Ping) //creating a ping object of the ping structure in the kademlia package
// net.LookupHost(127.0.0.1)
// a, err := net.LookupIP("www.google.com")
ping.MsgID = kademlia.NewRandomID()
ping.Sender = kadem.MyContact
//--------------------------------------------------------------------
var pong kademlia.Pong //declaring a pong object of the pong structure in the kademlia package, but not initializing it
// calling Kademlia.Ping method passing ping as request object and pong as response object
err = client.Call("Kademlia.Ping", ping, &pong)
if err != nil {
log.Fatal("Call: ", err)
}
//------------------------------------------------------------------------
// log.Printf("ping msgID: %s\n", ping.MsgID.AsString())
// log.Printf("pong msgID: %s\n", pong.MsgID.AsString())
fmt.Println("connecting server NodeID:", pong.Sender.NodeID.AsString())
// fmt.Println("connecting server host:",pong.Sender.Host)
// fmt.Println("connecting server Port:",pong.Sender.Port)
pong.Sender.Host = host2
kadem.KademBuckets.Update_Contact(pong.Sender, kadem.MyContact)
//--------------------------------------------------------------
/* //---taking a string and getting the key for that string---
a := "my name is rishabh"
fmt.Println(a)
h := sha1.New()
io.WriteString(h,a)
b:=h.Sum(nil)
fmt.Println(b)
c := hex.EncodeToString(b)
f, err := kademlia.FromString(c)
if err != nil {
log.Fatal("Call: ", err)
}
fmt.Println(f)
*/
//--------------------------------------------------------------
/*
a := "my name is rishabh"
f :=kademlia.StringToKey(a)
// fmt.Println(f)
//--------------------------------------------------------------
sreq := new(kademlia.StoreRequest)
sreq.MsgID = kademlia.NewRandomID()
sreq.Sender = kadem.MyContact
sreq.Key = f
sreq.Value = []byte(a)
var sres kademlia.StoreResult
fmt.Println(".....ii'm here......1")
err = client.Call("Kademlia.Store", sreq, &sres)
if err != nil {
log.Fatal("Call: ", err)
}
fmt.Println(".....ii'm here......2")
//------------------------------------------------------------------------
log.Printf("ping msgID: %s\n", sreq.MsgID.AsString())
log.Printf("pong msgID: %s\n", sres.MsgID.AsString())
fmt.Println(".....ii'm here......3")
err = client.Call("Kademlia.Store", sreq, &sres)
if err != nil {
log.Fatal("Call: ", err)
}
fmt.Println(".....ii'm here......4")
//------------------------------------------------------------------------
log.Printf("ping msgID: %s\n", sreq.MsgID.AsString())
log.Printf("pong msgID: %s\n", sres.MsgID.AsString())
*/
/*
a1 := new(kademlia.StoreRequest) //creating a ping object of the
b1 := new(kademlia.StoreResult) //creating a ping object of the
//---------------------------------------------------
a2 := new(kademlia.StoreRequest) //creating a ping object of the
b2 := new(kademlia.StoreResult) //creating a ping object of the
//----------------------------------------------------
err = client.Call("Kademlia.Ping", ping, &pong)
if err != nil {
log.Fatal("Call: ", err)
}
*/
//---------find value-------------------------
/*
fvreq := new(kademlia.FindValueRequest)
fvreq.MsgID = kademlia.NewRandomID()
fvreq.Sender = kadem.MyContact
fvreq.Key = f
var fvres kademlia.FindValueResult
fmt.Println(".....ii'm here......1")
err = client.Call("Kademlia.FindValue", fvreq, &fvres)
if err != nil {
log.Fatal("Call: ", err)
}
fmt.Println(".....ii'm here......2")
fmt.Println(string(fvres.Value))
*/
//--------------------------------------------------------------------
//--------------------------------------------------------------------
r := bufio.NewReader(os.Stdin)
// println("enter string:")
line, err := r.ReadString(delim)
if err != nil {
// fmt.Println(err)
// os.Exit(1)
}
// fmt.Println(line)
token := strings.Fields(line)
for token[0] != "exit" || token[0] == "" {
switch token[0] {
case "whoami":
// fmt.Println("this is 1")
a := kademlia.Whoami(kadem)
fmt.Println(a)
case "local_find_value":
// fmt.Println("this is 2")
key, err := kademlia.FromString(token[1])
// fmt.Println(id)
if err == nil {
kademlia.Local_find_value(kadem, key)
}
case "get_contact":
// fmt.Println("this is 3")
id, err := kademlia.FromString(token[1])
fmt.Println(id)
var c kademlia.Contact
if err == nil {
c = kademlia.Get_contact(kadem, id)
fmt.Println("Node id: ", c.NodeID)
fmt.Println("IP Addr: ", c.Host)
fmt.Println("Port : ", c.Port)
}
case "iterativeStore":
// fmt.Println("this is 4")
case "iterativeFindNode":
// fmt.Println("this is 5")
case "iterativeFindValue":
// fmt.Println("this is 6")
case "ping":
// fmt.Println("this is 7")
id, err := kademlia.FromString(token[1])
if err == nil {
ping, pong, s := kademlia.Pingnode(kadem, id)
client, err := rpc.DialHTTP("tcp", s) //REFPEER
// s = s + ":"
if err != nil {
log.Fatal("DialHTTP: ", err)
}
err = client.Call("Kademlia.Ping", ping, &pong)
if err != nil {
log.Fatal("Call: ", err)
}
log.Printf("ping msgID: %s\n", ping.MsgID.AsString())
log.Printf("pong msgID: %s\n", pong.MsgID.AsString())
}
case "store":
// fmt.Println("this is 8")
id, err := kademlia.FromString(token[1])
if err != nil {
}
key, err := kademlia.FromString(token[2])
if err != nil {
}
// val:=token[3]
val := ""
for t := 3; t < len(token); t++ {
val = val + string(token[t]) + " "
}
sreq, sres, s := kademlia.Storenode(kadem, id, key, val)
// s = s + ":"
client, err := rpc.DialHTTP("tcp", s) //REFPEER) //s
if err != nil {
log.Fatal("DialHTTP: ", err)
}
err = client.Call("Kademlia.Store", sreq, &sres)
if err != nil {
log.Fatal("Call: ", err)
}
// log.Printf("sreq msgID: %s\n", sreq.MsgID.AsString())
// log.Printf("sres msgID: %s\n", sres.MsgID.AsString())
case "find_node":
// fmt.Println("this is 9")
id, err := kademlia.FromString(token[1])
if err != nil {
}
key, err := kademlia.FromString(token[2])
if err != nil {
}
fnreq, fnres, s := kademlia.Findnode(kadem, id, key)
// s = s + ":"
client, err := rpc.DialHTTP("tcp", s) //REFPEER) //s
if err != nil {
log.Fatal("DialHTTP: ", err)
}
err = client.Call("Kademlia.FindNode", fnreq, &fnres)
if err != nil {
log.Fatal("Call: ", err)
}
log.Printf("fnreq msgID: %s\n", fnreq.MsgID.AsString())
log.Printf("fnres msgID: %s\n", fnres.MsgID.AsString())
var temp_contact kademlia.Contact
l := len(fnres.Nodes)
for j := 0; j < l; j++ {
if fnres.Nodes[j].NodeID.AsString() != "0" {
fmt.Println("NodeID : ", fnres.Nodes[j].IPAddr)
fmt.Println("Port : ", fnres.Nodes[j].Port)
fmt.Println("Host : ", fnres.Nodes[j].NodeID.AsString())
peer3 := fmt.Sprintf("%s:%d", fnres.Nodes[j].IPAddr, fnres.Nodes[j].Port)
addr3, err := net.ResolveTCPAddr("tcp4", peer3)
if err != nil {
log.Fatal("Call: ", err)
}
temp_contact.NodeID = fnres.Nodes[j].NodeID
temp_contact.Host = addr3.IP //net.IP(fnres.Nodes[j].IPAddr)
temp_contact.Port = fnres.Nodes[j].Port
kadem.KademBuckets.Update_Contact(temp_contact, kadem.MyContact)
}
} //for
case "find_value":
// fmt.Println("this is 10")
id, err := kademlia.FromString(token[1])
if err != nil {
}
key, err := kademlia.FromString(token[2])
if err != nil {
}
fvreq, fvres, s := kademlia.Findvalue(kadem, id, key)
// s = s + ":"
client, err := rpc.DialHTTP("tcp", s) //REFPEER) //s
if err != nil {
log.Fatal("DialHTTP: ", err)
}
err = client.Call("Kademlia.FindValue", fvreq, &fvres)
if err != nil {
log.Fatal("Call: ", err)
}
// log.Printf("fvreq msgID: %s\n", fvreq.MsgID.AsString())
// log.Printf("fvres msgID: %s\n", fvres.MsgID.AsString())
fmt.Println(string(fvres.Value))
case "exit":
break
default:
fmt.Println("enter the correct input")
} //switch
line, err := r.ReadString(delim)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
token = strings.Fields(line)
} //for
} //main
func main() {
// By default, Go seeds its RNG with 1. This would cause every program to
// generate the same sequence of IDs.
rand.Seed(time.Now().UnixNano())
// Get the bind and connect connection strings from command-line arguments.
flag.Parse()
args := flag.Args()
if len(args) != 2 {
log.Fatal("Must be invoked with exactly two arguments!\n")
}
listenStr := args[0]
firstPeerStr := args[1]
fmt.Printf("kademlia starting up!\n")
kadem := kademlia.NewKademlia()
myIpPort := strings.Split(listenStr, ":")
if len(myIpPort) != 2 {
log.Fatal("Invalid format of arg one, expected IP:PORT\n")
}
if strings.Contains(myIpPort[0], "localhost") {
myIpPort[0] = "127.0.0.1"
}
ipAndPort := strings.Split(firstPeerStr, ":")
if len(ipAndPort) != 2 {
log.Fatal("Invalid format of arg two, expected IP:PORT\n")
}
port, err := strconv.Atoi(myIpPort[1])
if err != nil {
log.Fatal("Could not parse local port\n")
}
rpc.Register(kadem)
rpc.HandleHTTP()
l, err := net.Listen("tcp", listenStr)
if err != nil {
log.Fatal("Listen: ", err)
}
// Serve forever.
go http.Serve(l, nil)
me := kademlia.Contact{NodeID: kademlia.CopyID(kadem.NodeID), Host: net.ParseIP(myIpPort[0]), Port: uint16(port)}
if false == strings.Contains(listenStr, firstPeerStr) {
err = kadem.Join(me, ipAndPort[0], ipAndPort[1])
if err != nil {
log.Fatal("Error joinging network", err)
}
}
fmt.Println("Finished starting up")
// Confirm our server is up with a PING request and then exit.
// Your code should loop forever, reading instructions from stdin and
// printing their results to stdout. See README.txt for more details.
input := bufio.NewReader(os.Stdin)
for {
commandStr, err := input.ReadString('\n')
commandStr = strings.TrimRight(strings.TrimRight(commandStr, string('\n')), string(' '))
if err != nil {
log.Fatal("Reading line:", err)
}
command_parts := strings.Split(commandStr, string(' '))
if len(commandStr) == 0 || len(command_parts) == 0 {
continue
}
command := []byte(strings.ToLower(command_parts[0]))
switch {
case bytes.Equal(command, []byte("ping")):
if len(command_parts) != 2 {
fmt.Println("Invalid format ping\n\tping nodeID\n\tping host:port")
continue
}
doPing(kadem, me, command_parts[1])
case bytes.Equal(command, []byte("store")):
if len(command_parts) != 4 {
fmt.Println("Invalid format store\n\tstore nodeid key data")
continue
}
id, err := kademlia.FromString(command_parts[1])
if err != nil {
fmt.Printf("ERR could not interpret nodeid as ID")
return
}
con, err := kadem.ContactFromID(id)
if err != nil {
fmt.Println("ERR : unknown node")
continue
}
remoteAddr := contactToAddrString(con)
client, err := rpc.DialHTTP("tcp", remoteAddr)
if err != nil {
log.Fatal("DialHTTP: ", err)
}
req := kademlia.StoreRequest{MsgID: kademlia.NewRandomID(), Sender: me}
req.Key, err = kademlia.FromString(command_parts[2])
if err != nil {
fmt.Printf("ERR: %v\n", err)
continue
}
req.Value = []byte(command_parts[3])
res := new(kademlia.StoreResult)
err = client.Call("Kademlia.Store", req, res)
if err != nil {
fmt.Printf("ERR: %v\n", err)
continue
}
_ = client.Close()
fmt.Println("OK")
case bytes.Equal(command, []byte("find_node")):
if len(command_parts) != 3 {
fmt.Println("Invalid format find_node\n\tfind_node nodeid key")
continue
}
id, err := kademlia.FromString(command_parts[1])
if err != nil {
fmt.Printf("ERR could not interpret nodeid as ID")
continue
}
con, err := kadem.ContactFromID(id)
if err != nil {
fmt.Println("ERR : unknown node")
continue
}
remoteAddr := contactToAddrString(con)
client, err := rpc.DialHTTP("tcp", remoteAddr)
if err != nil {
log.Fatal("DialHTTP: ", err)
}
req := kademlia.FindNodeRequest{MsgID: kademlia.NewRandomID()}
req.NodeID, err = kademlia.FromString(command_parts[2])
if err != nil {
fmt.Printf("ERR: %v\n", err)
continue
}
res := new(kademlia.FindNodeResult)
err = client.Call("Kademlia.FindNode", req, res)
if err != nil {
fmt.Printf("ERR: %v\n", err)
continue
}
_ = client.Close()
fmt.Printf("OK\n")
for _, node := range res.Nodes {
fmt.Printf("%s\n", node.NodeID.AsString())
}
case bytes.Equal(command, []byte("find_value")):
if len(command_parts) != 3 {
fmt.Println("Invalid format find_value\n\tfind_value key")
continue
}
id, err := kademlia.FromString(command_parts[1])
if err != nil {
fmt.Printf("ERR could not interpret nodeid as ID")
return
}
con, err := kadem.ContactFromID(id)
if err != nil {
fmt.Println("ERR : unknown node")
continue
}
remoteAddr := contactToAddrString(con)
client, err := rpc.DialHTTP("tcp", remoteAddr)
if err != nil {
log.Fatal("ERR: DialHTTP -> ", err)
}
req := kademlia.FindValueRequest{MsgID: kademlia.NewRandomID()}
req.Key, err = kademlia.FromString(command_parts[2])
if err != nil {
fmt.Printf("ERR: %v\n", err)
continue
}
res := new(kademlia.FindValueResult)
err = client.Call("Kademlia.FindValue", req, res)
if err != nil {
fmt.Printf("ERR: %v\n", err)
continue
}
_ = client.Close()
if res.Value != nil {
fmt.Printf("%s\n", string(res.Value))
} else {
for _, node := range res.Nodes {
fmt.Printf("%s\n", node.NodeID.AsString())
}
}
case bytes.Equal(command, []byte("whoami")):
if len(command_parts) != 1 {
fmt.Println("Invalid format get_node_id\n\twhoami")
continue
}
fmt.Printf("%s\n", kadem.NodeID.AsString())
case bytes.Equal(command, []byte("local_find_value")):
if len(command_parts) != 2 {
fmt.Println("Invalid format get_local_value\n\tlocal_find_value key")
continue
}
key, err := kademlia.FromString(command_parts[1])
if err != nil {
fmt.Printf("ERR: %v\n", err)
continue
}
var val kademlia.TimeValue
val, ok := kadem.StoredData[key]
if ok {
fmt.Printf("OK: %s\n", string(val.Data))
} else {
fmt.Printf("ERR no data for key\n")
}
case bytes.Equal(command, []byte("get_contact")):
if len(command_parts) != 2 {
fmt.Println("Invalid format get_contact\n\tget_contact nodeid")
continue
}
key, err := kademlia.FromString(command_parts[1])
con, err := kadem.ContactFromID(key)
if err != nil {
fmt.Println("ERR")
} else {
fmt.Printf("%s %d\n", con.Host.String(), con.Port)
}
case bytes.Equal(command, []byte("iterativeStore")):
if len(command_parts) != 3 {
fmt.Println("Invalid format iterativeStore")
continue
}
req := kademlia.StoreRequest{MsgID: kademlia.NewRandomID(), Sender: me}
req.Key, err = kademlia.FromString(command_parts[1])
if err != nil {
fmt.Printf("ERR: %v\n", err)
continue
}
req.Value = []byte(command_parts[2])
res := new(kademlia.StoreResult)
lastNode := kadem.IterStore(req, res)
if len(lastNode.NodeID) != 0 {
fmt.Printf("%s", lastNode.NodeID.AsString())
} else {
fmt.Println("Could not find a neighbor")
}
case bytes.Equal(command, []byte("iterativefindnode")):
if len(command_parts) != 2 {
fmt.Println("Invalid format iterativeFindNode")
continue
}
req := kademlia.FindNodeRequest{MsgID: kademlia.NewRandomID(), Sender: me}
req.NodeID, err = kademlia.FromString(command_parts[1])
if err != nil {
fmt.Printf("ERR: %v\n", err)
continue
}
res := new(kademlia.FindNodeResult)
err := kadem.IterFindNode(req, res)
if err != nil {
fmt.Printf("ERR: %v", err)
} else {
for _, node := range res.Nodes {
fmt.Printf("%s", node.NodeID.AsString())
}
}
case bytes.Equal(command, []byte("iterativefindvalue")):
if len(command_parts) != 2 {
fmt.Println("Invalid format iterativeFindValue")
continue
}
req := kademlia.FindValueRequest{MsgID: kademlia.NewRandomID(), Sender: me}
req.Key, err = kademlia.FromString(command_parts[1])
if err != nil {
fmt.Printf("ERR: %v\n", err)
continue
}
res := new(kademlia.FindValueResult)
err := kadem.IterFindValue(req, res)
if err != nil {
fmt.Printf("ERR: %v", err)
} else {
if res.Value != nil {
fmt.Printf("%s %s\n", res.Nodes[0].NodeID.AsString(), string(res.Value))
} else {
fmt.Println("ERR")
}
}
default:
fmt.Printf("Unknown command: %s\n", command_parts[0])
}
}
}
//returns array of random known-to-be-live MartiniContacts (for use as a path)
func GeneratePath(dm *DryMartini, min, max int) (mcPath []MartiniContact) {
const safetyMax int = 50
var err error
//var threshold int
//var myRand *big.Int
var randId kademlia.ID
var pathMap map[MartiniContact]bool = make(map[MartiniContact]bool)
//minBig := big.NewInt(int64(min))
//myRand, err = rand.Int(rand.Reader, big.NewInt(int64(max-min)))
//threshold = int((minBig.Int64() + myRand.Int64()))
mcPath = make([]MartiniContact, max)
var safetyCounter int = 0
for i := 0; i < max; i++ {
var foundNodes []kademlia.FoundNode
var success bool
safetyCounter++
dbg.Printf("Attempt %d to add to path (curlength %d)\n", Verbose, safetyCounter, i)
if safetyCounter == safetyMax {
dbg.Printf("GeneratePath failure. Made %d attempts. unable to get enough MartiniContacts to build path of length:%d\n", ERRORS, safetyMax, max)
panic(1)
}
randId = kademlia.NewRandomID()
success, foundNodes, _, err = kademlia.IterativeFind(dm.KademliaInst, randId, 1)
if len(foundNodes) == 0 {
dbg.Printf("GeneratePath:316. no nodes found; continueing\n", Verbose)
i--
continue
}
/*
dbg.Printf("GeneratePath: found live nodes:\n")
kademlia.PrintArrayOfFoundNodes(&foundNodes)
*/
if err != nil {
dbg.Printf("error finding random NodeID:%s, success:%s msg:%s\n", ERRORS, randId, success, err)
panic(1)
}
fuckthis, fuckingo := rand.Int(rand.Reader, big.NewInt(int64(len(foundNodes))))
if fuckingo != nil {
dbg.Printf("error making rand:%s\n", ERRORS, fuckingo)
}
index := int(fuckthis.Int64())
var hashedID kademlia.ID = foundNodes[index].NodeID.SHA1Hash()
dbg.Printf("generatePath: findMartiniContact for mc:%+v\n", Verbose, foundNodes[index])
var tempMC MartiniContact
tempMC, success = findMartiniContact(dm, hashedID)
if !success {
dbg.Printf("error finding MartiniContact with key:%s. err:%s\n", ERRORS, hashedID.AsString(), err)
i--
continue
}
_, alreadyInPath := pathMap[tempMC]
if alreadyInPath {
dbg.Printf("trying to make a circular path. skipping!\n", Verbose)
i--
continue
} else {
pathMap[tempMC] = true
mcPath[i] = tempMC
}
//err = json.Unmarshal(mcBytes, &mcPath[i])
dbg.Printf("GeneratePath path-mid-build: %+v\n", Verbose, mcPath)
}
return
}