lokinet/daemon/main.cpp

#include <llarp.h>
#include <pthread.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>

static void
progress()
{
  printf(".");
  fflush(stdout);
}

struct llarp_main
{
  struct llarp_alloc mem;
  struct llarp_crypto crypto;
  struct llarp_router *router     = nullptr;
  struct llarp_threadpool *worker = nullptr;
  struct llarp_threadpool *thread = nullptr;
  struct llarp_logic *logic       = nullptr;
  struct llarp_config *config     = nullptr;
  struct llarp_nodedb *nodedb     = nullptr;
  struct llarp_ev_loop *mainloop  = nullptr;
  char nodedb_dir[256];
  int exitcode;

  int
  shutdown()
  {
    printf("Shutting down ");

    progress();
    if(mainloop)
      llarp_ev_loop_stop(mainloop);

    progress();
    if(worker)
      llarp_threadpool_stop(worker);

    progress();

    if(worker)
      llarp_threadpool_join(worker);

    progress();
    if(logic)
      llarp_logic_stop(logic);

    progress();

    if(router)
      llarp_stop_router(router);

    progress();
    llarp_free_router(&router);

    progress();
    llarp_free_config(&config);

    progress();
    llarp_ev_loop_free(&mainloop);

    progress();
    llarp_free_threadpool(&worker);

    progress();

    llarp_free_logic(&logic);
    progress();

    printf("\n");
    fflush(stdout);
    return exitcode;
  }
};

void
iter_main_config(struct llarp_config_iterator *itr, const char *section,
                 const char *key, const char *val)
{
  llarp_main *m = static_cast< llarp_main * >(itr->user);

  if(!strcmp(section, "router"))
  {
    if(!strcmp(key, "threads"))
    {
      int workers = atoi(val);
      if(workers > 0 && m->worker == nullptr)
      {
        m->worker = llarp_init_threadpool(workers, "llarp-worker");
      }
    }
  }
  if(!strcmp(section, "netdb"))
  {
    if(!strcmp(key, "dir"))
    {
      strncpy(m->nodedb_dir, val, sizeof(m->nodedb_dir));
    }
  }
}

llarp_main *llarp = nullptr;

void
run_net(void *user)
{
  llarp_ev_loop_run(static_cast< llarp_ev_loop * >(user));
}

void
handle_signal(int sig)
{
  printf("\ninterrupted\n");
  llarp_ev_loop_stop(llarp->mainloop);
  llarp_logic_stop(llarp->logic);
}

int
main(int argc, char *argv[])
{
  const char *conffname = "daemon.ini";
  if(argc > 1)
    conffname = argv[1];
  llarp = new llarp_main;
  llarp_mem_stdlib(&llarp->mem);
  auto mem = &llarp->mem;
  llarp_new_config(&llarp->config);
  llarp_ev_loop_alloc(&llarp->mainloop);
  llarp_crypto_libsodium_init(&llarp->crypto);
  printf("%s loading config file %s\n", LLARP_VERSION, conffname);
  if(!llarp_load_config(llarp->config, conffname))
  {
    llarp_config_iterator iter;
    iter.user  = llarp;
    iter.visit = iter_main_config;
    llarp_config_iter(llarp->config, &iter);

    llarp->nodedb = llarp_nodedb_new(mem, &llarp->crypto);

    if(llarp->nodedb_dir[0])
    {
      llarp->nodedb_dir[sizeof(llarp->nodedb_dir) - 1] = 0;
      if(llarp_nodedb_ensure_dir(llarp->nodedb_dir))
      {
        // ensure worker thread pool
        if(!llarp->worker)
          llarp->worker = llarp_init_threadpool(2, "llarp-worker");
        // ensure netio thread
        llarp->thread = llarp_init_threadpool(1, "llarp-netio");
        llarp->logic  = llarp_init_logic(mem);

        llarp->router = llarp_init_router(mem, llarp->worker, llarp->mainloop,
                                          llarp->logic);

        if(llarp_configure_router(llarp->router, llarp->config))
        {
          signal(SIGINT, handle_signal);
          printf("starting router\n");
          llarp_run_router(llarp->router);
          // run mainloop
          llarp_threadpool_queue_job(llarp->thread,
                                     {llarp->mainloop, &run_net});
          printf("running\n");
          llarp->exitcode = 0;
          llarp_logic_mainloop(llarp->logic);
        }
        else
          printf("Failed to configure router\n");
      }
      else
        printf("failed to initialize nodedb\n");
    }
    else
      printf("no nodedb defined\n");
    return llarp->shutdown();
  }
  else
    printf("Failed to load config %s\n", conffname);
  delete llarp;
  return 1;
}