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/* BSD-2-Clause license
*
* Copyright (c) 2018-2023 NST <www.newinfosec.ru>, sss <sss at dark-alexandr dot net>.
*
*/
#include <limits.h>
#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <ev.h>
#include <stdio.h>
#include <execinfo.h>
#include <libunwind.h>
#include "cmdline.h"
#include "config_file.h"
#include "ev_loop.h"
#include "exports.h"
#include "globals.h"
#include "thread_impl.h"
#include "utilities.h"
#include "wrdp_thpool.h"
#include "ws_session.h"
#include "remote_control.h"
#include "curl_helpers.h"
#include "thread_sync.h"
globals g_globals;
static void
custom_thread_init(void *user_pool_data, wrdp_thpool_thread *t)
{
per_thread_curl_init(user_pool_data, t);
}
static void
init_internals()
{
if (g_globals.settings.thread_count <= 0)
{
g_globals.settings.thread_count = sysconf(_SC_NPROCESSORS_ONLN);
}
if (g_globals.settings.thread_count <= 0)
{
g_globals.settings.thread_count = 2;
}
if (!init_exports())
{
printf("error: failed to initialize core exports\n");
exit(EXIT_FAILURE);
}
/* random seed */
srand(time(0) + 13);
LIST_INIT(&(g_globals.backends_head));
void *c = init_curl_global();
g_globals.thpool = wrdp_thpool_create(g_globals.settings.thread_count,
g_globals.settings.tasks_per_thread, custom_thread_init, 0, 0, 0,
pool_message_handler, thread_message_handler, EV_DEFAULT, c);
}
static void
settings_load_default()
{
memset(&g_globals, 0, sizeof(globals));
memset(&g_globals.settings, 0, sizeof(global_settings));
g_globals.settings.secret_key_verify[0] = 0;
g_globals.settings.secret_key_sign[0] = 0;
g_globals.settings.thread_count = -1;
}
static void
settings_validate()
{
bool failure = false;
if (!g_globals.settings.ws_port)
g_globals.settings.ws_port = 8080;
if (!g_globals.settings.ctl_port)
g_globals.settings.ctl_port = 13666;
if (!g_globals.settings.tasks_per_thread)
g_globals.settings.tasks_per_thread = 1024;
if (!g_globals.settings.secret_key_verify[0])
{
printf("\"secret_key_verify\" must be set\n");
failure = true;
}
if (!g_globals.settings.secret_key_sign[0])
{
strcpy(g_globals.settings.secret_key_sign,
g_globals.settings.secret_key_verify);
}
if (!g_globals.settings.ctl_ssl_cert)
{
printf("\"ctl_ssl_cert\" must be set\n");
failure = true;
}
if (!g_globals.settings.ctl_ssl_key)
{
printf("\"ctl_ssl_key\" must be set\n");
failure = true;
}
if (failure)
{
exit(EXIT_FAILURE);
}
}
void
shutdown_core()
{
free(g_globals.exports);
}
static void
daemonize()
{
pid_t p = fork();
if (p)
{
printf("child process forked, exiting parent\n");
exit(EXIT_SUCCESS);
}
/* TODO: */
}
/* https://stackoverflow.com/questions/77005/how-to-automatically
* -generate-a-stacktrace-when-my-program-crashes */
/*static void
sigsegv_handler(int sig) {
void *array[100];
size_t size;
// get void*'s for all entries on the stack
size = backtrace (array, 100);
// print out all the frames to stderr
fprintf(stderr, "Error: signal %d:\n", sig);
backtrace_symbols_fd (array, size, STDERR_FILENO);
exit (EXIT_FAILURE);
} */
#ifdef DEBUG
/* https://github.com/cslarsen/libunwind-examples/blob/master/backtrace.cpp */
static void
sigsegv_handler(int sig)
{
unw_cursor_t cursor;
unw_context_t context;
unw_getcontext(&context);
unw_init_local(&cursor, &context);
int n = 0;
while (unw_step(&cursor) > 0)
{
unw_word_t ip, sp, off;
unw_get_reg(&cursor, UNW_REG_IP, &ip);
unw_get_reg(&cursor, UNW_REG_SP, &sp);
char symbol[256] = {"<unknown>"};
char *name = symbol;
unw_get_proc_name(&cursor, symbol, sizeof(symbol), &off);
printf("#%-2d 0x%016" PRIxPTR " sp=0x%016" PRIxPTR
" %s + 0x%" PRIxPTR "\n",
++n, ip, sp, name, off);
if (name != symbol)
free(name);
}
exit(EXIT_FAILURE);
}
/* this is required to generate gprof profile */
static void
sigusr2_handler(int sif)
{
exit(EXIT_SUCCESS);
}
#endif
int
main(int argc, char **argv)
{
#ifdef DEBUG
signal(SIGSEGV, sigsegv_handler);
signal(SIGUSR2, sigusr2_handler);
#endif
settings_load_default();
handle_cmdline_args(argc, argv);
if (g_globals.settings.daemon)
{
daemonize();
}
settings_validate();
init_internals();
{
int ws_tcp_sock = ws_server_init();
int ws_unix_sock = ws_server_init_unix();
int ctl_server_tcp_sock = ctl_server_init_tcp();
int ctl_server_unix_sock = ctl_server_init_unix();
//init_remote_control();
run_ev_loop_main(ws_tcp_sock, ws_unix_sock, ctl_server_tcp_sock,
ctl_server_unix_sock);
}
shutdown_core();
return 0;
}
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