awe yeh

.gitignore

@@ -5,4 +5,7 @@
 *.o
 *.plist
 
-llarpd
+llarpd
+
+*.test
+*.bin

Makefile

@@ -11,8 +11,18 @@ STATIC_OBJ = $(STATIC_SRC_CPP:.cpp=.cpp.o) $(STATIC_SRC_C:.c=.c.o)
 DAEMON_SRC = $(wildcard $(REPO)/daemon/*.c)
 DAEMON_OBJ = $(DAEMON_SRC:.c=.c.o)
 
+TEST_SRC_C = $(wildcard $(REPO)/test/*.c)
+TEST_SRC_CPP = $(wildcard $(REPO)/test/*.cpp)
+
+TEST_OBJ_C = $(TEST_SRC_C:.c=.c.bin)
+TEST_OBJ_CPP = $(TEST_SRC_CPP:.cpp=.cpp.bin)
+
+TEST_SRC = $(TEST_SRC_C) $(TEST_SRC_CPP)
+
+TEST_OBJ = $(TEST_OBJ_C) $(TEST_OBJ_CPP)
+
 HDRS = $(wildcard $(REPO)/llarp/*.hpp) $(wildcard $(REPO)/include/*/*.h) 
-SRCS = $(DAEMON_SRC) $(STATIC_SRC_CPP) $(STATIC_SRC_C)
+SRCS = $(DAEMON_SRC) $(STATIC_SRC_CPP) $(STATIC_SRC_C) $(TEST_SRC_C) $(TEST_SRC_CPP)
 FORMAT = clang-format
 
 SODIUM_FLAGS = $(shell pkg-config --cflags libsodium)
@@ -31,7 +41,7 @@ endif
 
 REQUIRED_CFLAGS = $(LIBUV_FLAGS) $(SODIUM_FLAGS) -I$(REPO)/include -std=c99 $(CFLAGS) $(DEBUG_FLAGS) $(VER_FLAGS)
 REQUIRED_CXXFLAGS = $(LIBUV_FLAGS) $(SODIUM_FLAGS) -I$(REPO)/include -std=c++17 $(CXXFLAGS) $(DEBUG_FLAGS) $(VER_FLAGS)
-REQUIRED_LDFLAGS = $(LDFLAGS) -ljemalloc $(SODIUM_LIBS) $(LIBUV_LIBS)
+REQUIRED_LDFLAGS = $(LDFLAGS) -ljemalloc $(SODIUM_LIBS) $(LIBUV_LIBS) -lm -lstdc++
 
 all: build
 
@@ -40,6 +50,21 @@ format: $(HDRS) $(SRCS)
 
 build: $(EXE)
 
+test: $(TEST_OBJ_CPP) $(TEST_OBJ_C)
+
+
+$(TEST_SRC): $(STATIC_LIB)
+
+$(TEST_OBJ_CPP): $(TEST_SRC_CPP)
+	$(CXX) $(REQUIRED_CXXFLAGS) $< -o $<.bin $(STATIC_LIB) $(REQUIRED_LDFLAGS)
+	mv $<.bin $<.test
+	$<.test
+
+$(TEST_OBJ_C): $(TEST_SRC_C)
+	$(CC) $(REQUIRED_CFLAGS) $< -o $<.bin $(STATIC_LIB) $(REQUIRED_LDFLAGS)
+	mv $<.bin $<.test
+	$<.test
+
 $(EXE): $(DAEMON_OBJ) $(STATIC_LIB)
 	$(CXX) $(DAEMON_OBJ) $(STATIC_LIB) $(REQUIRED_LDFLAGS) -o $(EXE) 
 
@@ -53,4 +78,4 @@ $(STATIC_LIB):  $(STATIC_OBJ)
 	$(AR) -r $(STATIC_LIB) $(STATIC_OBJ)
 
 clean:
-	$(RM) $(DAEMON_OBJ) $(EXE) $(STATIC_OBJ) $(STATIC_LIB)
+	$(RM) $(DAEMON_OBJ) $(EXE) $(STATIC_OBJ) $(STATIC_LIB) $(TEST_OBJ)

include/llarp/crypto.h

@@ -25,16 +25,24 @@ typedef uint8_t llarp_hmacsec_t[HMACSECSIZE];
 typedef uint8_t llarp_sig_t[SIGSIZE];
 typedef uint8_t llarp_tunnel_nounce_t[TUNNOUNCESIZE];
 
+struct llarp_keypair
+{
+  llarp_pubkey_t pub;
+  llarp_seckey_t sec;
+};
+
+typedef bool (*llarp_dh_func)(llarp_sharedkey_t *, llarp_pubkey_t, llarp_tunnel_nounce_t, llarp_seckey_t);
+
 struct llarp_crypto {
   bool (*xchacha20)(llarp_buffer_t, llarp_sharedkey_t, llarp_nounce_t);
-  bool (*dh_client)(llarp_sharedkey_t *, llarp_pubkey_t, llarp_tunnel_nounce_t,
-                    llarp_seckey_t);
-  bool (*dh_server)(llarp_sharedkey_t *, llarp_pubkey_t, llarp_tunnel_nounce_t,
-                    llarp_seckey_t);
+  llarp_dh_func dh_client;
+  llarp_dh_func dh_server;
   bool (*hash)(llarp_hash_t *, llarp_buffer_t);
   bool (*hmac)(llarp_hash_t *, llarp_buffer_t, llarp_hmacsec_t);
   bool (*sign)(llarp_sig_t *, llarp_seckey_t, llarp_buffer_t);
   bool (*verify)(llarp_pubkey_t, llarp_buffer_t, llarp_sig_t);
+  void (*randomize)(llarp_buffer_t);
+  void (*keygen)(struct llarp_keypair *);
 };
 
 void llarp_crypto_libsodium_init(struct llarp_crypto *c);

include/llarp/crypto_async.h

@@ -0,0 +1,37 @@
+#ifndef LLARP_CRYPTO_ASYNC_H_
+#define LLARP_CRYPTO_ASYNC_H_
+#include <llarp/crypto.h>
+#include <llarp/ev.h>
+#include <llarp/threadpool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+  struct llarp_async_dh;
+
+  struct llarp_async_dh * llarp_async_dh_new(struct llarp_crypto * crypto, struct llarp_ev_loop * ev, struct llarp_threadpool * tp);
+  void llarp_async_dh_free(struct llarp_async_dh ** dh);
+
+  struct llarp_dh_result;
+  
+  typedef void (*llarp_dh_complete_hook)(struct llarp_dh_result *);
+
+
+  struct llarp_dh_internal;
+  
+  struct llarp_dh_result
+  {
+    struct llarp_dh_internal * impl;
+    llarp_sharedkey_t result;
+    void * user;
+    llarp_dh_complete_hook hook;
+  };
+
+  void llarp_async_client_dh(struct llarp_async_dh * dh, llarp_seckey_t ourkey, llarp_pubkey_t theirkey, llarp_tunnel_nounce_t nounce, llarp_dh_complete_hook result, void * user);
+  void llarp_async_server_dh(struct llarp_async_dh * dh, llarp_seckey_t ourkey, llarp_pubkey_t theirkey, llarp_tunnel_nounce_t nounce, llarp_dh_complete_hook result, void * user);  
+
+#ifdef __cplusplus
+}
+#endif
+#endif

include/llarp/ev.h

@@ -34,21 +34,33 @@ int llarp_ev_add_udp_listener(struct llarp_ev_loop *ev,
 
 int llarp_ev_close_udp_listener(struct llarp_udp_listener *listener);
 
-struct llarp_ev_job {
+  struct llarp_ev_async_call;
+  
+typedef void (*llarp_ev_work_func)(struct llarp_ev_async_call *);
+
+
+  struct llarp_ev_caller;
+  
+struct llarp_ev_async_call {
   /** the loop this job belongs to */
-  struct llarp_ev_loop *loop;
+  const struct llarp_ev_loop *loop;
+  /** private implementation */
+  const struct llarp_ev_caller * parent;
   /** user data */
-  void *user;
-  /** work is called async when ready in the event loop thread */
-  void (*work)(struct llarp_ev_job *);
+  const void *user;
+  /** 
+      work is called async when ready in the event loop thread
+      must not free from inside this call as it is done elsewhere
+   */
+  const llarp_ev_work_func work;
 };
 
-/**
-    call work async in event loop thread (thread safe)
-    return true if we queued the job otherwise return false
- */
-bool llarp_ev_async(struct llarp_ev_loop *ev, struct llarp_ev_job job);
+  struct llarp_ev_caller * llarp_ev_prepare_async(struct llarp_ev_loop *ev, llarp_ev_work_func func);
+
+  bool llarp_ev_call_async(struct llarp_ev_caller * c, void * user);
 
+  void llarp_ev_caller_stop(struct llarp_ev_caller * c);
+  
 #ifdef __cplusplus
 }
 #endif

include/llarp/threadpool.h

@@ -10,16 +10,21 @@ struct llarp_threadpool;
 struct llarp_threadpool *llarp_init_threadpool(int workers);
 void llarp_free_threadpool(struct llarp_threadpool **tp);
 
+  typedef void (*llarp_thread_work_func)(void*);
+
+  
 /** job to be done in worker thread */
 struct llarp_thread_job {
   /**
       called async after work is executed
    */
-  struct llarp_ev_job *result;
+  struct llarp_ev_caller * caller;
+  void * data;
+  
   /** user data to pass to work function */
   void *user;
   /** called in threadpool worker thread */
-  void (*work)(void *);
+  llarp_thread_work_func work;
 };
 
 void llarp_threadpool_queue_job(struct llarp_threadpool *tp,

llarp/crypto_async.c

@@ -0,0 +1,85 @@
+#include <llarp/crypto_async.h>
+#include <llarp/mem.h>
+#include <string.h>
+
+struct llarp_async_dh
+{
+  llarp_dh_func client;
+  llarp_dh_func server;
+  struct llarp_threadpool * tp;
+  struct llarp_ev_caller * caller;
+};
+
+struct llarp_dh_internal
+{
+  llarp_dh_func func;
+  llarp_pubkey_t theirkey;
+  llarp_seckey_t ourkey;
+  llarp_tunnel_nounce_t nounce;
+  struct llarp_dh_result result;
+};
+
+static void llarp_crypto_dh_work(void * user)
+{
+  struct llarp_dh_internal * impl = (struct llarp_dh_internal *)user;
+  impl->func(&impl->result.result, impl->theirkey, impl->nounce, impl->ourkey);
+}
+
+static void llarp_crypto_dh_result(struct llarp_ev_async_call * call)
+{
+  struct llarp_dh_internal * impl = (struct llarp_dh_internal *) call->user;
+  impl->result.hook(&impl->result);
+  llarp_g_mem.free(impl);
+}
+
+static void llarp_async_dh_exec(struct llarp_async_dh * dh, llarp_dh_func func, llarp_seckey_t ourkey, llarp_pubkey_t theirkey, llarp_tunnel_nounce_t nounce, llarp_dh_complete_hook result, void * user)
+{
+  struct llarp_dh_internal * impl = llarp_g_mem.alloc(sizeof(struct llarp_dh_internal), 16);
+  memcpy(impl->theirkey, theirkey, sizeof(llarp_pubkey_t));
+  memcpy(impl->ourkey, ourkey, sizeof(llarp_seckey_t));
+  memcpy(impl->nounce, nounce, sizeof(llarp_tunnel_nounce_t));
+  impl->result.impl = impl;
+  impl->result.user = user;
+  impl->result.hook = result;
+  impl->func = func;
+  struct llarp_thread_job job = {
+    .caller = dh->caller,
+    .data = impl,
+    .user = impl,
+    .work = &llarp_crypto_dh_work
+  };
+  llarp_threadpool_queue_job(dh->tp, job);
+}
+
+
+void llarp_async_client_dh(struct llarp_async_dh * dh, llarp_seckey_t ourkey, llarp_pubkey_t theirkey, llarp_tunnel_nounce_t nounce, llarp_dh_complete_hook result, void * user)
+{
+  llarp_async_dh_exec(dh, dh->client, ourkey, theirkey, nounce, result, user);
+}
+
+void llarp_async_server_dh(struct llarp_async_dh * dh, llarp_seckey_t ourkey, llarp_pubkey_t theirkey, llarp_tunnel_nounce_t nounce, llarp_dh_complete_hook result, void * user)
+{
+  llarp_async_dh_exec(dh, dh->server, ourkey, theirkey, nounce, result, user);
+}
+
+
+
+struct llarp_async_dh * llarp_async_dh_new(struct llarp_crypto * crypto, struct llarp_ev_loop * ev, struct llarp_threadpool * tp)
+{
+  struct llarp_async_dh * dh = llarp_g_mem.alloc(sizeof(struct llarp_async_dh), 16);
+  dh->client = crypto->dh_client;
+  dh->server = crypto->dh_server;
+  dh->tp = tp;
+  dh->caller = llarp_ev_prepare_async(ev, &llarp_crypto_dh_result);
+  return dh;
+}
+
+void llarp_async_dh_free(struct llarp_async_dh ** dh)
+{
+  if(*dh)
+  {
+    llarp_ev_caller_stop((*dh)->caller);
+    llarp_g_mem.free(*dh);
+    *dh = NULL;
+  }
+}

llarp/crypto_libsodium.cpp

@@ -1,17 +1,15 @@
 #include <llarp/crypto.h>
-#include <sodium/crypto_generichash.h>
-#include <sodium/crypto_scalarmult.h>
-#include <sodium/crypto_sign.h>
-#include <sodium/crypto_stream_xchacha20.h>
+#include <sodium.h>
+#include <assert.h>
 
 namespace llarp {
 namespace sodium {
-bool xchacha20(llarp_buffer_t buff, llarp_sharedkey_t k, llarp_nounce_t n) {
+static bool xchacha20(llarp_buffer_t buff, llarp_sharedkey_t k, llarp_nounce_t n) {
   uint8_t *base = (uint8_t *)buff.base;
   return crypto_stream_xchacha20_xor(base, base, buff.sz, n, k) == 0;
 }
 
-bool dh(llarp_sharedkey_t *shared, uint8_t *client_pk, uint8_t *server_pk,
+static bool dh(llarp_sharedkey_t *shared, uint8_t *client_pk, uint8_t *server_pk,
         uint8_t *remote_key, uint8_t *local_key) {
   uint8_t *out = *shared;
   const size_t outsz = SHAREDKEYSIZE;
@@ -26,7 +24,7 @@ bool dh(llarp_sharedkey_t *shared, uint8_t *client_pk, uint8_t *server_pk,
   return true;
 }
 
-bool dh_client(llarp_sharedkey_t *shared, llarp_pubkey_t pk,
+static bool dh_client(llarp_sharedkey_t *shared, llarp_pubkey_t pk,
                llarp_tunnel_nounce_t n, llarp_seckey_t sk) {
   llarp_pubkey_t local_pk;
   crypto_scalarmult_base(local_pk, sk);
@@ -37,7 +35,7 @@ bool dh_client(llarp_sharedkey_t *shared, llarp_pubkey_t pk,
   return false;
 }
 
-bool dh_server(llarp_sharedkey_t *shared, llarp_pubkey_t pk,
+static bool dh_server(llarp_sharedkey_t *shared, llarp_pubkey_t pk,
                llarp_tunnel_nounce_t n, llarp_seckey_t sk) {
   llarp_pubkey_t local_pk;
   crypto_scalarmult_base(local_pk, sk);
@@ -48,31 +46,44 @@ bool dh_server(llarp_sharedkey_t *shared, llarp_pubkey_t pk,
   return false;
 }
 
-bool hash(llarp_hash_t *result, llarp_buffer_t buff) {
+static bool hash(llarp_hash_t *result, llarp_buffer_t buff) {
   const uint8_t *base = (const uint8_t *)buff.base;
   return crypto_generichash(*result, HASHSIZE, base, buff.sz, nullptr, 0) != -1;
 }
 
-bool hmac(llarp_hash_t *result, llarp_buffer_t buff, llarp_seckey_t secret) {
+static bool hmac(llarp_hash_t *result, llarp_buffer_t buff, llarp_seckey_t secret) {
   const uint8_t *base = (const uint8_t *)buff.base;
   return crypto_generichash(*result, sizeof(llarp_hash_t), base, buff.sz,
                             secret, HMACSECSIZE) != -1;
 }
 
-bool sign(llarp_sig_t *result, llarp_seckey_t secret, llarp_buffer_t buff) {
+static bool sign(llarp_sig_t *result, llarp_seckey_t secret, llarp_buffer_t buff) {
   const uint8_t *base = (const uint8_t *)buff.base;
   return crypto_sign_detached(*result, nullptr, base, buff.sz, secret) != -1;
 }
 
-bool verify(llarp_pubkey_t pub, llarp_buffer_t buff, llarp_sig_t sig) {
+static bool verify(llarp_pubkey_t pub, llarp_buffer_t buff, llarp_sig_t sig) {
   const uint8_t *base = (const uint8_t *)buff.base;
   return crypto_sign_verify_detached(sig, base, buff.sz, pub) != -1;
 }
+
+  static void randomize(llarp_buffer_t buff)
+  {
+    randombytes((unsigned char *)buff.base, buff.sz);
+  }
+
+  static void keygen(struct llarp_keypair * keys)
+  {
+    randombytes(keys->sec, sizeof(llarp_seckey_t));
+    unsigned char sk[64];
+    crypto_sign_seed_keypair(keys->pub, sk, keys->sec);
+  }
 } // namespace sodium
 } // namespace llarp
 
 extern "C" {
 void llarp_crypto_libsodium_init(struct llarp_crypto *c) {
+  assert(sodium_init() != -1);
   c->xchacha20 = llarp::sodium::xchacha20;
   c->dh_client = llarp::sodium::dh_client;
   c->dh_server = llarp::sodium::dh_server;
@@ -80,5 +91,7 @@ void llarp_crypto_libsodium_init(struct llarp_crypto *c) {
   c->hmac = llarp::sodium::hmac;
   c->sign = llarp::sodium::sign;
   c->verify = llarp::sodium::verify;
+  c->randomize = llarp::sodium::randomize;
+  c->keygen = llarp::sodium::keygen;
 }
 }

llarp/ev.cpp

@@ -2,6 +2,65 @@
 #include <llarp/ev.h>
 #include <uv.h>
 
+#include <mutex>
+#include <queue>
+
+struct llarp_ev_caller
+{
+  static void * operator new(size_t sz)
+  {
+    return llarp::Alloc<llarp_ev_caller>();
+  }
+
+  static void operator delete(void * ptr)
+  {
+    llarp_g_mem.free(ptr);
+  }
+
+
+  llarp_ev_caller(llarp_ev_loop * ev, llarp_ev_work_func func) :
+    loop(ev),
+    work(func)
+  {
+    async.data = this;
+  }
+
+  ~llarp_ev_caller()
+  {
+  }              
+
+  bool appendCall(void * user)
+  {
+    std::unique_lock<std::mutex> lock(access);
+    bool should = pending.size() == 0;
+    llarp_ev_async_call * call = new llarp_ev_async_call{
+      loop,
+      this,
+      user,
+      this->work};
+    pending.push(call);
+    return should;
+  }
+
+  void Call()
+  {
+    std::unique_lock<std::mutex> lock(access);
+    while(pending.size() > 0)
+    {
+      auto & front = pending.front();
+      front->work(front);
+      pending.pop();
+    }
+  }
+  
+  std::mutex access;
+  struct llarp_ev_loop * loop;
+  uv_async_t async;
+  std::queue<llarp_ev_async_call *> pending;
+  llarp_ev_work_func work;
+};
+  
+
 struct llarp_ev_loop {
   uv_loop_t _loop;
 
@@ -61,16 +120,14 @@ static void udp_close_cb(uv_handle_t *handle) {
 
 namespace llarp {
 
-static void ev_handle_async_closed(uv_handle_t *handle) {
-  struct llarp_ev_job *ev = static_cast<llarp_ev_job *>(handle->data);
-  llarp_g_mem.free(ev);
-  llarp_g_mem.free(handle);
+static void ev_caller_async_closed(uv_handle_t *handle) {
+  llarp_ev_caller *caller = static_cast<llarp_ev_caller *>(handle->data);
+  delete caller;
 }
 
-static void ev_handle_async(uv_async_t *handle) {
-  struct llarp_ev_job *ev = static_cast<llarp_ev_job *>(handle->data);
-  ev->work(ev);
-  uv_close((uv_handle_t *)handle, ev_handle_async_closed);
+static void ev_handle_async_call(uv_async_t *handle) {
+  llarp_ev_caller * caller = static_cast<llarp_ev_caller *>(handle->data);
+  caller->Call();
 }
 } // namespace llarp
 
@@ -132,23 +189,29 @@ int llarp_ev_close_udp_listener(struct llarp_udp_listener *listener) {
 
 void llarp_ev_loop_stop(struct llarp_ev_loop *loop) { uv_stop(loop->loop()); }
 
-bool llarp_ev_async(struct llarp_ev_loop *loop, struct llarp_ev_job job) {
-  struct llarp_ev_job *job_copy =
-      static_cast<struct llarp_ev_job *>(llarp_g_mem.alloc(
-          sizeof(struct llarp_ev_job), llarp::alignment<llarp_ev_job>()));
-  job_copy->work = job.work;
-  job_copy->loop = loop;
-  job_copy->user = job.user;
-  uv_async_t *async = static_cast<uv_async_t *>(
-      llarp_g_mem.alloc(sizeof(uv_async_t), llarp::alignment<uv_async_t>()));
-  async->data = job_copy;
-  if (uv_async_init(loop->loop(), async, llarp::ev_handle_async) == 0 &&
-      uv_async_send(async))
-    return true;
-  else {
-    llarp_g_mem.free(job_copy);
-    llarp_g_mem.free(async);
-    return false;
+  struct llarp_ev_caller * llarp_ev_prepare_async(struct llarp_ev_loop * loop, llarp_ev_work_func work)
+{
+  llarp_ev_caller * caller = new llarp_ev_caller(loop, work);
+  if(uv_async_init(loop->loop(), &caller->async, llarp::ev_handle_async_call) == 0)
+    return caller;
+  else
+  {
+    delete caller;
+    return nullptr;
   }
 }
+
+bool llarp_ev_call_async(struct llarp_ev_caller * caller, void * user)
+{
+  if(caller->appendCall(user))
+    return uv_async_send(&caller->async) == 0;
+  else
+    return true;
+}
+
+void llarp_ev_caller_stop(struct llarp_ev_caller * caller)
+{
+  uv_close((uv_handle_t*)&caller->async, llarp::ev_caller_async_closed);
+}
+  
 }

llarp/mem.hpp

@@ -6,6 +6,13 @@ namespace llarp {
 template <typename T> static constexpr size_t alignment() {
   return std::exp2(1 + std::floor(std::log2(sizeof(T))));
 }
+
+  template<typename T>
+    static T * Alloc(llarp_alloc * mem=&llarp_g_mem)
+  {
+    return static_cast<T *>(
+      mem->alloc(sizeof(T), alignment<T>()));
+  }
 } // namespace llarp
 
 #endif

llarp/threadpool.cpp

@@ -4,7 +4,7 @@
 namespace llarp {
 namespace thread {
 Pool::Pool(size_t workers) {
-  stop.store(true);
+  stop.store(false);
   while (workers--) {
     threads.emplace_back([this] {
       for (;;) {
@@ -21,10 +21,12 @@ Pool::Pool(size_t workers) {
         // do work
         job.work(job.user);
         // inform result if needed
-        if (job.result && job.result->loop)
-          if (!llarp_ev_async(job.result->loop, *job.result)) {
+        if (job.caller)
+        {
+          if (!llarp_ev_call_async(job.caller, job.data)) {
             std::cerr << "failed to queue result in thread worker" << std::endl;
           }
+        }
       }
     });
   }
@@ -73,6 +75,16 @@ struct llarp_threadpool *llarp_init_threadpool(int workers) {
 
 void llarp_threadpool_join(struct llarp_threadpool *pool) { pool->impl.Join(); }
 
+void llarp_threadpool_start(struct llarp_threadpool * pool)
+{
+  /** no op */
+}
+
+  void llarp_threadpool_queue_job(struct llarp_threadpool * pool, struct llarp_thread_job job)
+  {
+    pool->impl.QueueJob(job);
+  }
+  
 void llarp_free_threadpool(struct llarp_threadpool **pool) {
   delete *pool;
   *pool = nullptr;

test/test_async_dh.c

@@ -0,0 +1,74 @@
+#include <llarp/crypto_async.h>
+#include <llarp/mem.h>
+
+#include <stdio.h>
+
+struct dh_bench_main
+{
+  size_t completed;
+  size_t num;
+  struct llarp_ev_loop * ev;
+  struct llarp_async_dh * dh;
+};
+
+static void handle_dh_complete(struct llarp_dh_result * res)
+{
+  struct dh_bench_main * m = (struct dh_bench_main *) res->user;
+  m->completed++;
+  if(m->completed % 1000 == 0)
+    printf("completed %ld\n", m->completed);
+  if(m->completed == m->num)
+  {
+    printf("we done\n");
+    llarp_ev_loop_stop(m->ev);
+  }
+}
+
+int main(int argc, char * argv[])
+{
+  struct dh_bench_main dh_main;
+  struct llarp_crypto crypto;
+  struct llarp_threadpool * tp;
+  
+  llarp_mem_jemalloc();
+  llarp_crypto_libsodium_init(&crypto);
+  llarp_ev_loop_alloc(&dh_main.ev);
+
+  tp = llarp_init_threadpool(8);
+  dh_main.dh = llarp_async_dh_new(&crypto, dh_main.ev, tp);
+  llarp_threadpool_start(tp);
+
+  /* do work here */
+  dh_main.num = 100000;
+  dh_main.completed = 0;
+  struct llarp_keypair ourkey;
+  struct llarp_keypair theirkey;
+
+  crypto.keygen(&ourkey);
+  crypto.keygen(&theirkey);
+  
+  
+  llarp_tunnel_nounce_t nounce;
+  llarp_buffer_t n_buff;
+  n_buff.base = nounce;
+  n_buff.cur = n_buff.base;
+  n_buff.sz = sizeof(llarp_tunnel_nounce_t);
+  
+  size_t sz = dh_main.num;
+  printf("starting %ld dh jobs\n", sz);
+  while(sz--)
+  {
+    crypto.randomize(n_buff);
+    llarp_async_client_dh(dh_main.dh, ourkey.sec, theirkey.pub, nounce, handle_dh_complete, &dh_main);
+  }
+  printf("started %ld dh jobs\n", dh_main.num);
+  llarp_ev_loop_run(dh_main.ev);
+  
+  llarp_threadpool_join(tp);
+  llarp_async_dh_free(&dh_main.dh);
+
+  llarp_ev_loop_free(&dh_main.ev);
+  llarp_free_threadpool(&tp);
+  printf("did %ld of %ld work\n", dh_main.completed, dh_main.num);
+  return 0;
+}

test/test_cpp.cpp

@@ -0,0 +1,6 @@
+
+
+int main(int argc, char * argv[])
+{
+  return 0;
+}