Robot
/
croc
mirror of https://github.com/schollz/croc.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #9 from schollz/refactor 

Refactor
This commit is contained in:
Zack 2017-10-18 07:10:29 -06:00 committed by GitHub
parent 86b12a3770 a058386d1b
commit a9551f7a9c
4 changed files with 317 additions and 217 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

304
connect.go
View File

@ -2,13 +2,14 @@ package main
import (
"bytes"
"encoding/hex"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"math"
"net"
"os"
"path"
"strconv"
"strings"
"sync"
@ -18,26 +19,104 @@ import (
log "github.com/sirupsen/logrus"
)
var bars []*uiprogress.Bar
type Connection struct {
Server string
File FileMetaData
NumberOfConnections int
Code string
HashedCode string
IsSender bool
Debug bool
DontEncrypt bool
bars []*uiprogress.Bar
}
type FileMetaData struct {
Name string
Size int
Hash string
IV string
Salt string
bytes []byte
}
func NewConnection(flags *Flags) *Connection {
c := new(Connection)
c.Debug = flags.Debug
c.DontEncrypt = flags.DontEncrypt
c.Server = flags.Server
c.Code = flags.Code
c.NumberOfConnections = flags.NumberOfConnections
if len(flags.File) > 0 {
c.File.Name = flags.File
c.IsSender = true
} else {
c.IsSender = false
}
return c
}
func (c *Connection) Run() {
if len(c.Code) == 0 {
if !c.IsSender {
c.Code = getInput("Enter receive code: ")
}
if len(c.Code) < 5 {
c.Code = GetRandomName()
}
}
log.SetFormatter(&log.TextFormatter{})
if c.Debug {
log.SetLevel(log.DebugLevel)
} else {
log.SetLevel(log.WarnLevel)
}
if c.IsSender {
// encrypt the file
log.Debug("encrypting...")
fdata, err := ioutil.ReadFile(c.File.Name)
if err != nil {
log.Fatal(err)
return
}
c.File.bytes, c.File.Salt, c.File.IV = Encrypt(fdata, c.Code, c.DontEncrypt)
log.Debug("...finished encryption")
c.File.Hash = HashBytes(fdata)
c.File.Size = len(c.File.bytes)
if c.Debug {
ioutil.WriteFile(c.File.Name+".encrypted", c.File.bytes, 0644)
}
fmt.Printf("Sending %d byte file named '%s'\n", c.File.Size, c.File.Name)
fmt.Printf("Code is: %s\n", c.Code)
}
c.runClient()
}
// runClient spawns threads for parallel uplink/downlink via TCP
func runClient(connectionType string, codePhrase string) {
func (c *Connection) runClient() {
logger := log.WithFields(log.Fields{
"codePhrase": codePhrase,
"connection": connectionType,
"code": c.Code,
"sender?": c.IsSender,
})
c.HashedCode = Hash(c.Code)
var wg sync.WaitGroup
wg.Add(numberConnections)
wg.Add(c.NumberOfConnections)
uiprogress.Start()
if !debugFlag {
bars = make([]*uiprogress.Bar, numberConnections)
if !c.Debug {
c.bars = make([]*uiprogress.Bar, c.NumberOfConnections)
}
for id := 0; id < numberConnections; id++ {
gotOK := false
for id := 0; id < c.NumberOfConnections; id++ {
go func(id int) {
defer wg.Done()
port := strconv.Itoa(27001 + id)
connection, err := net.Dial("tcp", serverAddress+":"+port)
connection, err := net.Dial("tcp", c.Server+":"+port)
if err != nil {
panic(err)
}
@ -45,12 +124,21 @@ func runClient(connectionType string, codePhrase string) {
message := receiveMessage(connection)
logger.Debugf("relay says: %s", message)
logger.Debugf("telling relay: %s", connectionType+"."+codePhrase)
sendMessage(connectionType+"."+Hash(codePhrase), connection)
if connectionType == "s" { // this is a sender
if c.IsSender {
logger.Debugf("telling relay: %s", "s."+c.Code)
metaData, err := json.Marshal(c.File)
if err != nil {
log.Error(err)
}
encryptedMetaData, salt, iv := Encrypt(metaData, c.Code)
sendMessage("s."+c.HashedCode+"."+hex.EncodeToString(encryptedMetaData)+"-"+salt+"-"+iv, connection)
} else {
logger.Debugf("telling relay: %s", "r."+c.Code)
sendMessage("r."+c.HashedCode+".0.0.0", connection)
}
if c.IsSender { // this is a sender
if id == 0 {
fmt.Println("waiting for other to connect")
fmt.Printf("\nSending (<-%s)..\n", connection.RemoteAddr().String())
}
logger.Debug("waiting for ok from relay")
message = receiveMessage(connection)
@ -59,62 +147,100 @@ func runClient(connectionType string, codePhrase string) {
time.Sleep(100 * time.Millisecond)
// Write data from file
logger.Debug("send file")
sendFile(id, connection, codePhrase)
c.sendFile(id, connection)
} else { // this is a receiver
// receive file
logger.Debug("waiting for meta data from sender")
message = receiveMessage(connection)
m := strings.Split(message, "-")
encryptedData, salt, iv := m[0], m[1], m[2]
encryptedBytes, err := hex.DecodeString(encryptedData)
if err != nil {
log.Error(err)
return
}
decryptedBytes, _ := Decrypt(encryptedBytes, c.Code, salt, iv, c.DontEncrypt)
err = json.Unmarshal(decryptedBytes, &c.File)
if err != nil {
log.Error(err)
return
}
log.Debugf("meta data received: %v", c.File)
// have the main thread ask for the okay
if id == 0 {
fmt.Printf("Receiving file (%d bytes) into: %s\n", c.File.Size, c.File.Name)
getOk := getInput("ok? (y/n): ")
if getOk == "y" {
gotOK = true
} else {
return
}
}
// wait for the main thread to get the okay
for limit := 0; limit < 1000; limit++ {
if gotOK {
break
}
time.Sleep(10 * time.Millisecond)
}
if !gotOK {
return
}
sendMessage("ok", connection)
logger.Debug("receive file")
fileName, fileIV, fileSalt, fileHash = receiveFile(id, connection, codePhrase)
c.receiveFile(id, connection)
}
}(id)
}
wg.Wait()
if connectionType == "r" {
catFile(fileName)
encrypted, err := ioutil.ReadFile(fileName + ".encrypted")
if !c.IsSender {
c.catFile(c.File.Name)
encrypted, err := ioutil.ReadFile(c.File.Name + ".encrypted")
if err != nil {
log.Error(err)
return
}
fmt.Println("\n\ndecrypting...")
log.Debugf("codePhrase: [%s]", codePhrase)
log.Debugf("fileSalt: [%s]", fileSalt)
log.Debugf("fileIV: [%s]", fileIV)
decrypted, err := Decrypt(encrypted, codePhrase, fileSalt, fileIV)
log.Debugf("Code: [%s]", c.Code)
log.Debugf("Salt: [%s]", c.File.Salt)
log.Debugf("IV: [%s]", c.File.IV)
decrypted, err := Decrypt(encrypted, c.Code, c.File.Salt, c.File.IV, c.DontEncrypt)
if err != nil {
log.Error(err)
return
}
log.Debugf("writing %d bytes to %s", len(decrypted), fileName)
err = ioutil.WriteFile(fileName, decrypted, 0644)
log.Debugf("writing %d bytes to %s", len(decrypted), c.File.Name)
err = ioutil.WriteFile(c.File.Name, decrypted, 0644)
if err != nil {
log.Error(err)
}
if !debugFlag {
os.Remove(fileName + ".encrypted")
if !c.Debug {
os.Remove(c.File.Name + ".encrypted")
}
log.Debugf("\n\n\ndownloaded hash: [%s]", HashBytes(decrypted))
log.Debugf("\n\n\nrelayed hash: [%s]", fileHash)
log.Debugf("\n\n\nrelayed hash: [%s]", c.File.Hash)
if fileHash != HashBytes(decrypted) {
fmt.Printf("\nUh oh! %s is corrupted! Sorry, try again.\n", fileName)
if c.File.Hash != HashBytes(decrypted) {
fmt.Printf("\nUh oh! %s is corrupted! Sorry, try again.\n", c.File.Name)
} else {
fmt.Printf("\nDownloaded %s!", fileName)
fmt.Printf("\nReceived file written to %s", c.File.Name)
}
} else {
fmt.Println("File sent.")
// TODO: Add confirmation
}
}
func catFile(fileNameToReceive string) {
func (c *Connection) catFile(fname string) {
// cat the file
os.Remove(fileNameToReceive)
finished, err := os.Create(fileNameToReceive + ".encrypted")
os.Remove(fname)
finished, err := os.Create(fname + ".encrypted")
defer finished.Close()
if err != nil {
log.Fatal(err)
}
for id := 0; id < numberConnections; id++ {
fh, err := os.Open(fileNameToReceive + "." + strconv.Itoa(id))
for id := 0; id < c.NumberOfConnections; id++ {
fh, err := os.Open(fname + "." + strconv.Itoa(id))
if err != nil {
log.Fatal(err)
}
@ -124,74 +250,59 @@ func catFile(fileNameToReceive string) {
log.Fatal(err)
}
fh.Close()
os.Remove(fileNameToReceive + "." + strconv.Itoa(id))
os.Remove(fname + "." + strconv.Itoa(id))
}
}
func receiveFile(id int, connection net.Conn, codePhrase string) (fileNameToReceive string, iv string, salt string, hashOfFile string) {
func (c *Connection) receiveFile(id int, connection net.Conn) error {
logger := log.WithFields(log.Fields{
"function": "receiveFile #" + strconv.Itoa(id),
})
logger.Debug("waiting for file data")
logger.Debug("waiting for chunk size from sender")
fileSizeBuffer := make([]byte, 10)
connection.Read(fileSizeBuffer)
fileDataString := strings.Trim(string(fileSizeBuffer), ":")
fileSizeInt, _ := strconv.Atoi(fileDataString)
chunkSize := int64(fileSizeInt)
logger.Debugf("chunk size: %d", chunkSize)
fileDataBuffer := make([]byte, BUFFERSIZE)
connection.Read(fileDataBuffer)
fileDataString := strings.Trim(string(fileDataBuffer), ":")
pieces := strings.Split(fileDataString, "-")
fileSizeInt, _ := strconv.Atoi(pieces[0])
fileSize := int64(fileSizeInt)
logger.Debugf("filesize: %d", fileSize)
fileNameToReceive = pieces[1]
logger.Debugf("fileName: [%s]", fileNameToReceive)
iv = pieces[2]
logger.Debugf("iv: [%s]", iv)
salt = pieces[3]
logger.Debugf("salt: [%s]", salt)
hashOfFile = pieces[4]
logger.Debugf("hashOfFile: [%s]", hashOfFile)
os.Remove(fileNameToReceive + "." + strconv.Itoa(id))
newFile, err := os.Create(fileNameToReceive + "." + strconv.Itoa(id))
os.Remove(c.File.Name + "." + strconv.Itoa(id))
newFile, err := os.Create(c.File.Name + "." + strconv.Itoa(id))
if err != nil {
panic(err)
}
defer newFile.Close()
if !debugFlag {
bars[id] = uiprogress.AddBar(int(fileSize)/1024 + 1).AppendCompleted().PrependElapsed()
if !c.Debug {
c.bars[id] = uiprogress.AddBar(int(chunkSize)/1024 + 1).AppendCompleted().PrependElapsed()
}
logger.Debug("waiting for file")
var receivedBytes int64
for {
if !debugFlag {
bars[id].Incr()
if !c.Debug {
c.bars[id].Incr()
}
if (fileSize - receivedBytes) < BUFFERSIZE {
if (chunkSize - receivedBytes) < BUFFERSIZE {
logger.Debug("at the end")
io.CopyN(newFile, connection, (fileSize - receivedBytes))
io.CopyN(newFile, connection, (chunkSize - receivedBytes))
// Empty the remaining bytes that we don't need from the network buffer
if (receivedBytes+BUFFERSIZE)-fileSize < BUFFERSIZE {
if (receivedBytes+BUFFERSIZE)-chunkSize < BUFFERSIZE {
logger.Debug("empty remaining bytes from network buffer")
connection.Read(make([]byte, (receivedBytes+BUFFERSIZE)-fileSize))
connection.Read(make([]byte, (receivedBytes+BUFFERSIZE)-chunkSize))
}
break
}
io.CopyN(newFile, connection, BUFFERSIZE)
//Increment the counter
receivedBytes += BUFFERSIZE
}
logger.Debug("received file")
return
return nil
}
func sendFile(id int, connection net.Conn, codePhrase string) {
func (c *Connection) sendFile(id int, connection net.Conn) {
logger := log.WithFields(log.Fields{
"function": "sendFile #" + strconv.Itoa(id),
})
@ -199,41 +310,29 @@ func sendFile(id int, connection net.Conn, codePhrase string) {
var err error
numChunks := math.Ceil(float64(len(fileBytes)) / float64(BUFFERSIZE))
chunksPerWorker := int(math.Ceil(numChunks / float64(numberConnections)))
numChunks := math.Ceil(float64(c.File.Size) / float64(BUFFERSIZE))
chunksPerWorker := int(math.Ceil(numChunks / float64(c.NumberOfConnections)))
bytesPerConnection := int64(chunksPerWorker * BUFFERSIZE)
if id+1 == numberConnections {
bytesPerConnection = int64(len(fileBytes)) - (numberConnections-1)*bytesPerConnection
chunkSize := int64(chunksPerWorker * BUFFERSIZE)
if id+1 == c.NumberOfConnections {
chunkSize = int64(c.File.Size) - int64(c.NumberOfConnections-1)*chunkSize
}
if id == 0 || id == numberConnections-1 {
if id == 0 || id == c.NumberOfConnections-1 {
logger.Debugf("numChunks: %v", numChunks)
logger.Debugf("chunksPerWorker: %v", chunksPerWorker)
logger.Debugf("bytesPerConnection: %v", bytesPerConnection)
logger.Debugf("fileNameToSend: %v", path.Base(fileName))
logger.Debugf("bytesPerchunkSizeConnection: %v", chunkSize)
}
payload := strings.Join([]string{
strconv.FormatInt(int64(bytesPerConnection), 10), // filesize
path.Base(fileName),
fileIV,
fileSalt,
fileHash,
}, "-")
logger.Debugf("sending fileSize: %d", bytesPerConnection)
logger.Debugf("sending fileName: %s", path.Base(fileName))
logger.Debugf("sending iv: %s", fileIV)
logger.Debugf("sending salt: %s", fileSalt)
logger.Debugf("sending sha256sum: %s", fileHash)
logger.Debugf("payload is %d bytes", len(payload))
connection.Write([]byte(fillString(payload, BUFFERSIZE)))
logger.Debugf("sending chunk size: %d", chunkSize)
connection.Write([]byte(fillString(strconv.FormatInt(int64(chunkSize), 10), 10)))
sendBuffer := make([]byte, BUFFERSIZE)
file := bytes.NewBuffer(fileBytes)
file := bytes.NewBuffer(c.File.bytes)
chunkI := 0
if !c.Debug {
c.bars[id] = uiprogress.AddBar(chunksPerWorker).AppendCompleted().PrependElapsed()
}
for {
_, err = file.Read(sendBuffer)
if err == io.EOF {
@ -241,8 +340,11 @@ func sendFile(id int, connection net.Conn, codePhrase string) {
logger.Debug("EOF")
break
}
if (chunkI >= chunksPerWorker*id && chunkI < chunksPerWorker*id+chunksPerWorker) || (id == numberConnections-1 && chunkI >= chunksPerWorker*id) {
if (chunkI >= chunksPerWorker*id && chunkI < chunksPerWorker*id+chunksPerWorker) || (id == c.NumberOfConnections-1 && chunkI >= chunksPerWorker*id) {
connection.Write(sendBuffer)
if !c.Debug {
c.bars[id].Incr()
}
}
chunkI++
}

20
crypto.go
View File

@ -28,23 +28,25 @@ func GetRandomName() string {
return strings.Join(result, "-")
}
func Encrypt(plaintext []byte, passphrase string) ([]byte, string, string) {
if dontEncrypt {
func Encrypt(plaintext []byte, passphrase string, dontencrypt ...bool) (encrypted []byte, salt string, iv string) {
if len(dontencrypt) > 0 && dontencrypt[0] {
return plaintext, "salt", "iv"
}
key, salt := deriveKey(passphrase, nil)
iv := make([]byte, 12)
key, saltBytes := deriveKey(passphrase, nil)
ivBytes := make([]byte, 12)
// http://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38d.pdf
// Section 8.2
rand.Read(iv)
rand.Read(ivBytes)
b, _ := aes.NewCipher(key)
aesgcm, _ := cipher.NewGCM(b)
data := aesgcm.Seal(nil, iv, plaintext, nil)
return data, hex.EncodeToString(salt), hex.EncodeToString(iv)
encrypted = aesgcm.Seal(nil, ivBytes, plaintext, nil)
salt = hex.EncodeToString(saltBytes)
iv = hex.EncodeToString(ivBytes)
return
}
func Decrypt(data []byte, passphrase string, salt string, iv string) (plaintext []byte, err error) {
if dontEncrypt {
func Decrypt(data []byte, passphrase string, salt string, iv string, dontencrypt ...bool) (plaintext []byte, err error) {
if len(dontencrypt) > 0 && dontencrypt[0] {
return data, nil
}
saltBytes, _ := hex.DecodeString(salt)

92
main.go
View File

@ -4,87 +4,39 @@ import (
"bufio"
"flag"
"fmt"
"io/ioutil"
"os"
"strings"
log "github.com/sirupsen/logrus"
)
const BUFFERSIZE = 1024
const numberConnections = 4
// Build flags
var server, file string
// Global varaibles
var serverAddress, fileName, codePhraseFlag, connectionTypeFlag string
var runAsRelay, debugFlag, dontEncrypt bool
var fileSalt, fileIV, fileHash string
var fileBytes []byte
type Flags struct {
Relay bool
Debug bool
DontEncrypt bool
Server string
File string
Code string
NumberOfConnections int
}
func main() {
flag.BoolVar(&runAsRelay, "relay", false, "run as relay")
flag.BoolVar(&debugFlag, "debug", false, "debug mode")
flag.StringVar(&serverAddress, "server", "cowyo.com", "address of relay server")
flag.StringVar(&fileName, "send", "", "file to send")
flag.StringVar(&codePhraseFlag, "code", "", "use your own code phrase")
flag.BoolVar(&dontEncrypt, "no-encrypt", false, "turn off encryption")
flags := new(Flags)
flag.BoolVar(&flags.Relay, "relay", false, "run as relay")
flag.BoolVar(&flags.Debug, "debug", false, "debug mode")
flag.StringVar(&flags.Server, "server", "cowyo.com", "address of relay server")
flag.StringVar(&flags.File, "send", "", "file to send")
flag.StringVar(&flags.Code, "code", "", "use your own code phrase")
flag.BoolVar(&flags.DontEncrypt, "no-encrypt", false, "turn off encryption")
flag.IntVar(&flags.NumberOfConnections, "threads", 4, "number of threads to use")
flag.Parse()
// Check build flags too, which take precedent
if server != "" {
serverAddress = server
}
if file != "" {
fileName = file
}
if len(fileName) > 0 {
connectionTypeFlag = "s" // sender
if flags.Relay {
r := NewRelay(flags)
r.Run()
} else {
connectionTypeFlag = "r" //receiver
}
if !runAsRelay {
if len(codePhraseFlag) == 0 {
if connectionTypeFlag == "r" {
codePhraseFlag = getInput("What is your code phrase? ")
}
if len(codePhraseFlag) < 5 {
codePhraseFlag = GetRandomName()
fmt.Println("Your code phrase is now " + codePhraseFlag)
}
}
}
if connectionTypeFlag == "s" {
// encrypt the file
fmt.Println("encrypting...")
fdata, err := ioutil.ReadFile(fileName)
if err != nil {
log.Fatal(err)
return
}
fileBytes, fileSalt, fileIV = Encrypt(fdata, codePhraseFlag)
fileHash = HashBytes(fdata)
if debugFlag {
ioutil.WriteFile(fileName+".encrypted", fileBytes, 0644)
}
}
log.SetFormatter(&log.TextFormatter{})
if debugFlag {
log.SetLevel(log.DebugLevel)
} else {
log.SetLevel(log.WarnLevel)
}
if runAsRelay {
runServer()
} else if len(serverAddress) != 0 {
runClient(connectionTypeFlag, codePhraseFlag)
} else {
fmt.Println("You must specify either -file (for running as a server) or -server (for running as a client)")
c := NewConnection(flags)
c.Run()
}
}

118
relay.go
View File

@ -14,44 +14,65 @@ import (
type connectionMap struct {
reciever map[string]net.Conn
sender map[string]net.Conn
metadata map[string]string
sync.RWMutex
}
var connections connectionMap
func init() {
connections.Lock()
connections.reciever = make(map[string]net.Conn)
connections.sender = make(map[string]net.Conn)
connections.Unlock()
type Relay struct {
connections connectionMap
Debug bool
NumberOfConnections int
}
func runServer() {
func NewRelay(flags *Flags) *Relay {
r := new(Relay)
r.Debug = flags.Debug
r.NumberOfConnections = flags.NumberOfConnections
log.SetFormatter(&log.TextFormatter{})
if r.Debug {
log.SetLevel(log.DebugLevel)
} else {
log.SetLevel(log.WarnLevel)
}
return r
}
func (r *Relay) Run() {
r.connections = connectionMap{}
r.connections.Lock()
r.connections.reciever = make(map[string]net.Conn)
r.connections.sender = make(map[string]net.Conn)
r.connections.metadata = make(map[string]string)
r.connections.Unlock()
r.runServer()
}
func (r *Relay) runServer() {
logger := log.WithFields(log.Fields{
"function": "main",
})
logger.Debug("Initializing")
var wg sync.WaitGroup
wg.Add(numberConnections)
for id := 0; id < numberConnections; id++ {
go listenerThread(id, &wg)
wg.Add(r.NumberOfConnections)
for id := 0; id < r.NumberOfConnections; id++ {
go r.listenerThread(id, &wg)
}
wg.Wait()
}
func listenerThread(id int, wg *sync.WaitGroup) {
func (r *Relay) listenerThread(id int, wg *sync.WaitGroup) {
logger := log.WithFields(log.Fields{
"function": "listenerThread:" + strconv.Itoa(27000+id),
})
defer wg.Done()
err := listener(id)
err := r.listener(id)
if err != nil {
logger.Error(err)
}
}
func listener(id int) (err error) {
func (r *Relay) listener(id int) (err error) {
port := strconv.Itoa(27001 + id)
logger := log.WithFields(log.Fields{
"function": "listener" + ":" + port,
@ -69,15 +90,16 @@ func listener(id int) (err error) {
return errors.Wrap(err, "problem accepting connection")
}
logger.Debugf("Client %s connected", connection.RemoteAddr().String())
go clientCommuncation(id, connection)
go r.clientCommuncation(id, connection)
}
}
func clientCommuncation(id int, connection net.Conn) {
func (r *Relay) clientCommuncation(id int, connection net.Conn) {
sendMessage("who?", connection)
message := receiveMessage(connection)
connectionType := strings.Split(message, ".")[0]
codePhrase := strings.Split(message, ".")[1] + "-" + strconv.Itoa(id)
m := strings.Split(receiveMessage(connection), ".")
connectionType, codePhrase, metaData := m[0], m[1], m[2]
key := codePhrase + "-" + strconv.Itoa(id)
logger := log.WithFields(log.Fields{
"id": id,
"codePhrase": codePhrase,
@ -85,39 +107,61 @@ func clientCommuncation(id int, connection net.Conn) {
if connectionType == "s" {
logger.Debug("got sender")
connections.Lock()
connections.sender[codePhrase] = connection
connections.Unlock()
r.connections.Lock()
r.connections.metadata[key] = metaData
r.connections.sender[key] = connection
r.connections.Unlock()
// wait for receiver
for {
connections.RLock()
if _, ok := connections.reciever[codePhrase]; ok {
r.connections.RLock()
if _, ok := r.connections.reciever[key]; ok {
logger.Debug("got reciever")
connections.RUnlock()
r.connections.RUnlock()
break
}
connections.RUnlock()
r.connections.RUnlock()
time.Sleep(100 * time.Millisecond)
}
logger.Debug("telling sender ok")
sendMessage("ok", connection)
logger.Debug("preparing pipe")
connections.Lock()
con1 := connections.sender[codePhrase]
con2 := connections.reciever[codePhrase]
connections.Unlock()
r.connections.Lock()
con1 := r.connections.sender[key]
con2 := r.connections.reciever[key]
r.connections.Unlock()
logger.Debug("piping connections")
Pipe(con1, con2)
logger.Debug("done piping")
connections.Lock()
delete(connections.sender, codePhrase)
delete(connections.reciever, codePhrase)
connections.Unlock()
r.connections.Lock()
delete(r.connections.sender, key)
delete(r.connections.reciever, key)
delete(r.connections.metadata, key)
r.connections.Unlock()
logger.Debug("deleted sender and receiver")
} else {
// wait for sender's metadata
for {
r.connections.RLock()
if _, ok := r.connections.metadata[key]; ok {
logger.Debug("got sender meta data")
r.connections.RUnlock()
break
}
r.connections.RUnlock()
time.Sleep(100 * time.Millisecond)
logger.Debug("waiting for metadata")
}
// send meta data
r.connections.RLock()
sendMessage(r.connections.metadata[key], connection)
r.connections.RUnlock()
// check for receiver's consent
consent := receiveMessage(connection)
logger.Debug("consent: %s", consent)
logger.Debug("got reciever")
connections.Lock()
connections.reciever[codePhrase] = connection
connections.Unlock()
r.connections.Lock()
r.connections.reciever[key] = connection
r.connections.Unlock()
}
return
}