Success/Failure for work packages

Repeat working, send succ/fail msg for work package, added succ/fail
facility

bfclient/.gitignore

@@ -1,3 +1,4 @@
 /Debug/
 /Release/
 .clang-format
+/RelOpt/

bfclient/src/bf/Brainflyer.cpp

@@ -39,6 +39,7 @@ void Brainflyer::operator()() {
 
   comm::Work work;
 
+  while (true) {
     try {
       work = comm.getWork();
     } catch (runtime_error& e) {
@@ -46,11 +47,18 @@ void Brainflyer::operator()() {
       return;
     }
 
-  log("Got work", work.repr());
+    if (work.isEmpty()) {  // no more work available
-  performWork(work);
+      log("No more work available. Shutting down.");
+      return;
     }
 
-void Brainflyer::performWork(comm::Work work) {
+    log("Got work", work.repr());
+    performWork(work);
+    comm.sendResult(work);
+  }
+}
+
+void Brainflyer::performWork(comm::Work& work) {
   // brainflayer compatibility args
   int nopt_mod = 1;
 
@@ -72,25 +80,28 @@ void Brainflyer::performWork(comm::Work work) {
   long keys = 0;
   while (!work_end) {
     secp256k1_ec_pubkey_batch_incr(4096, nopt_mod, pub_batch, priv_batch, priv);
-
+    keys += 4096;
     memcpy(priv, priv_batch[4096 - 1], 32);  // set next starting key
 
-    int i = checkBatch(pub_batch, 4096);
+    size_t ch_batch_size =
+        work.total >= keys ? 4096 : work.total - (keys - 4096);
+    int i = checkBatch(pub_batch, ch_batch_size);
     if (i != -1) {
-      util::bytestr b_priv(priv_batch[i], 32);
+      work.key = util::bytestr(priv_batch[i], 32);
       log("Key found", util::bytestr(priv_batch[i], 32));
     }
 
-    for (int i = 0; i < 32; i++) {
-      if (priv[i] > priv_to[i]) {
     work_end = true;
-        break;
+    for (int i = 0; i < 32; i++) {
-      } else if (priv[i] < priv_to[i]) {
+      if (priv[i] < priv_to[i]) {
         work_end = false;
         break;
-      }  // equal: continue
+      } else if (priv[i] > priv_to[i]) {  // greater: work_end reached
+        break;
+      }  // equal: work_end reached
     }
-    keys += 4096;
+
+    log(keys, "checked");
   }
 
   log(keys, "checked");

bfclient/src/bf/Brainflyer.h

@@ -31,7 +31,7 @@ class Brainflyer {
   int checkBatch(unsigned char (*pub_batch)[65], size_t batch_size);
   void dumpBatch(unsigned char (*pub_batch)[65],
                  unsigned char (*priv_batch)[32]);
-  void performWork(comm::Work work);
+  void performWork(comm::Work& work);
 
   /*
    * Log facilities

bfclient/src/bfclient.cpp

@@ -17,10 +17,10 @@
 using namespace std;
 
 #define BATCH_MAX 4096
-#define WIN_SIZE 16
+#define WIN_SIZE 21
 
 int main() {
-  util::bytestr key("b907c3a2a3b27789dfb509b730dd47703c272868");
+  util::bytestr key("db53d9bbd1f3a83b094eeca7dd970bd85b492fa2");
 
   cout << "Initializing precomputation table" << endl;
   // init with window size 16, not reading from file
@@ -35,7 +35,7 @@ int main() {
   thread* threads = new thread[numThreads];
   cout << "Starting " << numThreads << " threads" << endl;
 
-  // numThreads = 1;
+  numThreads = 1;
   for (unsigned int i = 0; i < numThreads; i++) {
     threads[i] = thread{bf::Brainflyer(i, "127.0.0.1", 26765, key)};
   }

bfclient/src/comm/Comm.cpp

@@ -23,13 +23,7 @@ using namespace std;
 Comm::Comm(string host, int port) : port(port), host(host), sock(-1) {}
 
 Work Comm::getWork(void) {
-  if (sock < 0) {
+  checkConn();
-    if (!conn()) {
-      ostringstream o;
-      o << "Connection to " << host << ":" << port << " failed";
-      throw runtime_error(o.str());
-    }
-  }
 
   const char cmd[] = "WRK\n";
   if (send(sock, cmd, strlen(cmd), 0) < 0) {
@@ -42,12 +36,69 @@ Work Comm::getWork(void) {
     throw runtime_error("Receiving of work failed");
   }
 
+  buf[wrk_len] = '\0';
+
+  if (!strcmp(buf, "NIL\n")) return (Work());
+
   string ws = string(buf, wrk_len - 1);
   Work wrk(ws);
 
   return (wrk);
 }
 
+void Comm::sendResult(Work work) {
+  checkConn();
+
+  const char cmd[] = "RES\n";
+  if (send(sock, cmd, strlen(cmd), 0) < 0) {
+    throw runtime_error("Sending RES failed");
+  }
+
+  string res = work.from.toHex() + " " + work.to.toHex() + " " + "\n";
+  if (send(sock, res.c_str(), res.size(), 0) < 0) {
+    throw runtime_error("Sending work result failed");
+  }
+
+  char buf[1024];
+  ssize_t ack_len;
+  if ((ack_len = recv(sock, buf, 1024, 0)) < 0) {
+    throw runtime_error("Receiving ACK failed");
+  }
+
+  if (work.key.isEmpty()) {
+    if (send(sock, "NIL\n", 4, 0) < 0) {
+      throw runtime_error("Sending NIL ailed");
+    }
+  } else {
+    if (send(sock, "SUC\n", 4, 0) < 0) {
+      throw runtime_error("Sending SUC failed");
+    }
+
+    if ((ack_len = recv(sock, buf, 1024, 0)) < 0) {
+      throw runtime_error("Receiving ACK failed");
+    }
+
+    string key = work.key.toHex() + "\n";
+    if (send(sock, key.c_str(), key.length(), 0) < 0) {
+      throw runtime_error("Sending key failed");
+    }
+
+    if ((ack_len = recv(sock, buf, 1024, 0)) < 0) {
+      throw runtime_error("Receiving ACK failed");
+    }
+  }
+}
+
+void Comm::checkConn(void) {
+  if (sock < 0) {
+    if (!conn()) {
+      ostringstream o;
+      o << "Connection to " << host << ":" << port << " failed";
+      throw runtime_error(o.str());
+    }
+  }
+}
+
 /**
  * Connects socket to server
  *

bfclient/src/comm/Comm.h

@@ -23,13 +23,14 @@ class Comm {
   int sock;
 
   bool conn();
-  std::string retrieve();
+  void checkConn();
   void disconnect();
 
  public:
   Comm(std::string host, int port);
 
   comm::Work getWork();
+  void sendResult(comm::Work work);
 
   virtual ~Comm();
 };

bfclient/src/comm/Work.cpp

@@ -15,6 +15,8 @@ namespace comm {
 
 using namespace std;
 
+Work::Work() : total(0) {}
+
 Work::Work(string work_s) {
   vector<string> wrk_v = split(work_s, " ");
   assert(wrk_v.size() == 3);
@@ -24,6 +26,8 @@ Work::Work(string work_s) {
   total = strtol(wrk_v.at(2).c_str(), nullptr, 10);
 }
 
+bool Work::isEmpty() { return (total <= 0); }
+
 vector<string> Work::split(const string s, const string delimiter) {
   vector<string> split_str;
 

bfclient/src/comm/Work.h

@@ -20,9 +20,13 @@ class Work {
   util::bytestr to;
   long total;
 
-  Work() = default;
+  util::bytestr key;
+
+  Work();
   Work(std::string work);
 
+  bool isEmpty();
+
   std::string repr(void);
   std::vector<std::string> split(std::string s, std::string delimiter);
 

bfclient/src/util/bytestr.cpp

@@ -59,6 +59,10 @@ void bytestr::set(const byte* fromBytes, int len) {
   }
 }
 
+bool bytestr::isEmpty(void){
+	return bytes.empty();
+}
+
 const byte& bytestr::operator[](const int index) const {
   return (bytes[index]);
 }

bfclient/src/util/bytestr.h

@@ -31,6 +31,8 @@ class bytestr {
   void set(const string fromHex);
   void set(const byte* fromBytes, int len);
 
+  bool isEmpty();
+
   const byte& operator[](const int index) const;
 
   size_t size(void) const;

cnc/src/main/java/org/btcollider/cnc/CnC.java

@@ -18,7 +18,7 @@ public class CnC {
 	public static final int MAX_BITS = 62;
 
 	public static void main(String[] args) {
-		KeyServer.init(19, 3, 1);
+		KeyServer.init(54, 27, 18000000000l);
 		CommServer server = new CommServer(PORT);
 		try {
 			server.listen();

cnc/src/main/java/org/btcollider/cnc/comm/ClientWorker.java

@@ -1,6 +1,8 @@
 package org.btcollider.cnc.comm;
 
 import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.FileWriter;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.OutputStreamWriter;
@@ -86,30 +88,58 @@ public class ClientWorker implements Runnable {
 			ks.setInWork(kr);
 		}
 
+		if (kr == null) {
+			out.println("NIL");
+			log.debug("Stop work sent to {}", clientSocket.getInetAddress());
+		}
+		else {
 			String work = Long.toHexString(kr.getStart()) + " " + Long.toHexString(kr.getEnd()) + " " + kr.getTotal();
-
 			out.println(work);
-
 			log.debug("Work <{}> sent to {}", work, clientSocket.getInetAddress());
 		}
+	}
 
 	private void retrieveResult() {
-		String[] result;
 		try {
-			result = in.readLine().split(" ");
+			String[] result = in.readLine().split(" ");
 			KeyRange kr = new KeyRange(Long.parseLong(result[0], 16), Long.parseLong(result[1], 16));
 
 			synchronized (KeyServer.getInstance()) {
 				KeyServer.getInstance().setSearched(kr);
 			}
 
-			log.debug("Got result for {}", kr);
+			log.debug("Keyrange {} searched", kr);
+
+			out.println("ACK");
+
+			String suc = in.readLine();
+			switch (suc) {
+			case "NIL":
+				log.debug("Keyrange {} unsuccessful", kr);
+				break;
+			case "SUC":
+				log.info("Keyrange {} successful", kr);
+				out.println("ACK");
+				suc = in.readLine();
+				log.info("Found private key {}", suc);
+				writeKey(suc);
+				out.println("ACK");
+				break;
+			}
 
 		} catch (IOException e) {
 			log.error("Couldn't read result", e);
 		}
 	}
 	
+	private void writeKey(String key) {
+		try(BufferedWriter writer = new BufferedWriter(new FileWriter("/home/armin/Desktop/cwkey"))){
+			writer.write(key);
+		}catch(IOException e) {
+			log.error("Couldn't write key {} to keyfile", key, e);
+		}
+	}
+
 	private void shutDown() {
 		closeCommChannel();
 		if (!clientSocket.isClosed()) {

cnc/src/main/java/org/btcollider/cnc/keysrv/KeyServer.java

@@ -51,7 +51,7 @@ public class KeyServer {
 	public KeyRange getRange() {
 		BitSet keyStart = new BitSet(CnC.MAX_BITS);
 
-		recCollectKey(root, keyStart, index);
+		if(!recCollectKey(root, keyStart, index)) return null;
 
 		BitSet keyEnd = new BitSet(CnC.MAX_BITS);
 		keyEnd.or(keyStart); // set keyEnd to keyStart
@@ -78,6 +78,8 @@ public class KeyServer {
 	}
 
 	public void setInWork(KeyRange keyRange) {
+		if (keyRange == null) return;
+
 		markInWork(BitSet.valueOf(new long[] { keyRange.getStart() }));
 	}
 
@@ -201,7 +203,9 @@ public class KeyServer {
 		assert depth > 0;
 
 		KeyTree root = new KeyTree(true, null);
+		log.info("Starting recGenTree");
 		recGenKeyTree(root, depth - 1);
+		log.info("Ending recGenTree");
 
 		return root;
 	}
@@ -222,7 +226,7 @@ public class KeyServer {
 		recGenKeyTree(right, depth - 1);
 	}
 
-	private void recCollectKey(KeyTree kt, BitSet keyStart, int curIndex) {
+	private boolean recCollectKey(KeyTree kt, BitSet keyStart, int curIndex) {
 		assert curIndex > 0;
 
 		keyStart.set(curIndex, kt.getValue());
@@ -234,33 +238,36 @@ public class KeyServer {
 		if (left.isLeaf() || right.isLeaf()) {
 			assert left.isLeaf() && right.isLeaf(); // fully balanced binary tree by construction
 
+
+			if (!right.isFree() && ! left.isFree()) return false;
+
 			// No choice finish
 			if (!right.isFree())
 				keyStart.set(curIndex - 1, left.getValue());
 			else if (!left.isFree())
 				keyStart.set(curIndex - 1, right.getValue());
-			else if (left.isLeaf() && right.isLeaf()) { // Randomized finish
+			else if (left.isFree() && right.isFree()) { // Randomized finish
 				Random r = new Random();
 				boolean leftFirst = r.nextBoolean();
 				if(leftFirst) keyStart.set(curIndex - 1, left.getValue());
 				else keyStart.set(curIndex - 1, right.getValue());
 			}		
 
-			return;
+			return true;
 		}
 
 		// No choice depth-first traversal
 		if (!left.isFree())
-			recCollectKey(right, keyStart, curIndex - 1);
+			return recCollectKey(right, keyStart, curIndex - 1);
 		else if (!right.isFree())
-			recCollectKey(left, keyStart, curIndex - 1);
+			return recCollectKey(left, keyStart, curIndex - 1);
 		else { // Randomized depth-first traversal
 			Random r = new Random();
 			boolean leftFirst = r.nextBoolean();
 			if (leftFirst)
-				recCollectKey(left, keyStart, curIndex - 1);
+				return recCollectKey(left, keyStart, curIndex - 1);
 			else
-				recCollectKey(right, keyStart, curIndex - 1);
+				return recCollectKey(right, keyStart, curIndex - 1);
 		}
 	}