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dsmain.cpp
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dsmain.cpp
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/******************************************************************************
* This file is part of dirtsand. *
* *
* dirtsand is free software: you can redistribute it and/or modify *
* it under the terms of the GNU Affero General Public License as *
* published by the Free Software Foundation, either version 3 of the *
* License, or (at your option) any later version. *
* *
* dirtsand is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Affero General Public License for more details. *
* *
* You should have received a copy of the GNU Affero General Public License *
* along with dirtsand. If not, see <http://www.gnu.org/licenses/>. *
******************************************************************************/
#include "NetIO/Lobby.h"
#include "NetIO/Status.h"
#include "NetIO/CryptIO.h"
#include "GateKeeper/GateServ.h"
#include "FileServ/FileServer.h"
#include "AuthServ/AuthServer.h"
#include "GameServ/GameServer.h"
#include "SDL/DescriptorDb.h"
#include "errors.h"
#include "settings.h"
#include <string_theory/codecs>
#include <string_theory/stdio>
#include <openssl/evp.h>
#include <readline.h>
#include <history.h>
#include <signal.h>
#include <unistd.h>
#include <cstdio>
#ifdef __GLIBC__
#include <execinfo.h>
#endif
static char** dup_strlist(const char* text, const char** strlist, size_t count)
{
char** dupe;
if (count == 1) {
dupe = reinterpret_cast<char**>(malloc(sizeof(char*) * 2));
dupe[0] = strdup(strlist[0]);
dupe[1] = nullptr;
} else {
dupe = reinterpret_cast<char**>(malloc(sizeof(char*) * (count + 2)));
dupe[0] = strdup(text);
for (size_t i=0; i<count; ++i)
dupe[i+1] = strdup(strlist[i]);
dupe[count+1] = nullptr;
}
return dupe;
}
static char** console_completer(const char* text, int start, int end)
{
static const char* completions[] = {
/* Commands */
"addacct", "addallplayers", "clients", "commdebug", "globalsdl", "help", "keygen",
"modacct", "quit", "restart", "restrict", "welcome",
/* Services */
"auth", "lobby", "status",
};
rl_attempted_completion_over = true;
if (strlen(text) == 0)
return dup_strlist(text, completions, sizeof(completions) / sizeof(completions[0]));
std::vector<const char*> matches;
for (size_t i=0; i<sizeof(completions) / sizeof(completions[0]); ++i) {
if (strncmp(text, completions[i], strlen(text)) == 0)
matches.push_back(completions[i]);
}
if (matches.size() == 0)
return nullptr;
return dup_strlist(text, matches.data(), matches.size());
}
#ifdef __GLIBC__
static void print_trace(const char* text)
{
const size_t max_depth = 100;
size_t stack_depth;
void* stack_addrs[max_depth];
char** stack_strings;
stack_depth = backtrace(stack_addrs, max_depth);
stack_strings = backtrace_symbols(stack_addrs, stack_depth);
ST::printf(stderr, "{} at {}\n", text, stack_strings[0]);
for (size_t i=1; i<stack_depth; ++i)
ST::printf(stderr, " from {}\n", stack_strings[i]);
free(stack_strings);
}
static void sigh_crash(int signum)
{
const char *name =
(signum == SIGSEGV) ? "Segfault" :
(signum == SIGABRT) ? "Abort" :
(signum == SIGFPE) ? "Divide by Zero" :
(signum == SIGBUS) ? "Bus Error" :
"Unknown";
print_trace(name);
exit(4);
}
static void exception_filter()
{
print_trace("Unhandled exception");
exit(4);
}
#endif
static void sigh_term(int)
{
fclose(stdin);
}
static ST::string get_install_directory()
{
// Assume we're running as <install_directory>/bin/dirtsand
char path[PATH_MAX];
ssize_t exe_len = readlink("/proc/self/exe", path, sizeof(path));
if (exe_len > 0) {
ST::string spath(path, exe_len);
ST_ssize_t slash = spath.find_last('/');
if (slash >= 0) {
spath = spath.left(slash);
if (spath.ends_with("/bin"))
return spath.left(spath.size() - 4);
return spath;
}
}
// Couldn't get it from /proc -- try assuming cwd
if (getcwd(path, sizeof(path)))
return ST::string(path);
// The OS is returning nonsense -- just use "."
return ST_LITERAL(".");
}
static void do_help()
{
puts("dirtsand - D'ni in Real Time Server and Network Daemon");
puts("");
puts("Usage: /path/to/dirtsand [options] [/path/to/dirtsand.ini]");
puts("");
puts("Options:");
puts(" --help Show this information.");
puts(" --restrict-logins Run the server with logins restricted.");
puts(" --generate-keys Create a matching set of server and client keys.");
}
static void generate_keys()
{
uint8_t nbuffer[3][64], kbuffer[3][64], xbuffer[64];
fputs("Generating new server keys... This will take a while.", stdout);
fflush(stdout);
for (size_t i=0; i<3; ++i)
DS::GenPrimeKeys(nbuffer[i], kbuffer[i]);
fputs("\n--------------------\n", stdout);
fputs("Server keys: (dirtsand.ini)\n", stdout);
ST::printf("Key.Auth.N = {}\n", ST::base64_encode(nbuffer[0], 64));
ST::printf("Key.Auth.K = {}\n", ST::base64_encode(kbuffer[0], 64));
ST::printf("Key.Game.N = {}\n", ST::base64_encode(nbuffer[1], 64));
ST::printf("Key.Game.K = {}\n", ST::base64_encode(kbuffer[1], 64));
ST::printf("Key.Gate.N = {}\n", ST::base64_encode(nbuffer[2], 64));
ST::printf("Key.Gate.K = {}\n", ST::base64_encode(kbuffer[2], 64));
fputs("--------------------\n", stdout);
fputs("Client keys: (server.ini)\n", stdout);
DS::CryptCalcX(xbuffer, nbuffer[0], kbuffer[0], CRYPT_BASE_AUTH);
ST::printf("Server.Auth.N \"{}\"\n", ST::base64_encode(nbuffer[0], 64));
ST::printf("Server.Auth.X \"{}\"\n", ST::base64_encode(xbuffer, 64));
DS::CryptCalcX(xbuffer, nbuffer[1], kbuffer[1], CRYPT_BASE_GAME);
ST::printf("Server.Game.N \"{}\"\n", ST::base64_encode(nbuffer[1], 64));
ST::printf("Server.Game.X \"{}\"\n", ST::base64_encode(xbuffer, 64));
DS::CryptCalcX(xbuffer, nbuffer[2], kbuffer[2], CRYPT_BASE_GATE);
ST::printf("Server.Gate.N \"{}\"\n", ST::base64_encode(nbuffer[2], 64));
ST::printf("Server.Gate.X \"{}\"\n", ST::base64_encode(xbuffer, 64));
fputs("--------------------\n", stdout);
}
int main(int argc, char* argv[])
{
// refuse to run as root
if (geteuid() == 0) {
fputs("Do not run this server as root!\n", stderr);
return 1;
}
OpenSSL_add_all_digests();
// Preset some arguments
ST::string settings = get_install_directory() + "/dirtsand.ini";
bool restrictLogins = false;
// Poor man command parser
for (int i = 1; i < argc; ++i) {
const char* arg = argv[i];
if (arg[0] == '-') {
if (strcmp(arg, "--restrict-logins") == 0) {
restrictLogins = true;
} else if (strcmp(arg, "--generate-keys") == 0) {
generate_keys();
exit(0);
} else if (strcmp(arg, "--help") == 0) {
do_help();
exit(0);
}
} else {
settings = arg;
}
}
if (!DS::Settings::LoadFrom(settings)) {
fputs("Warning: Failed to load config file. Using defaults...\n", stderr);
DS::Settings::UseDefaults();
}
#ifdef __GLIBC__
// Show a stackdump in case we crash
std::set_terminate(&exception_filter);
signal(SIGSEGV, &sigh_crash);
signal(SIGABRT, &sigh_crash);
signal(SIGBUS, &sigh_crash);
signal(SIGFPE, &sigh_crash);
#endif
// Close the read pipe to gracefully trigger shutdown
signal(SIGTERM, &sigh_term);
// Ignore sigpipe and force send() to return EPIPE
signal(SIGPIPE, SIG_IGN);
SDL::DescriptorDb::LoadDescriptors(DS::Settings::SdlPath());
DS::FileServer_Init();
DS::AuthServer_Init(restrictLogins);
DS::GameServer_Init();
DS::GateKeeper_Init();
DS::StartLobby();
if (DS::Settings::StatusEnabled())
DS::StartStatusHTTP();
char rl_prompt[32];
snprintf(rl_prompt, 32, "ds-%u> ", DS::Settings::BuildId());
char* cmdbuf = nullptr;
rl_attempted_completion_function = &console_completer;
for ( ;; ) {
cmdbuf = readline(rl_prompt);
if (!cmdbuf) {
// Get us out of the prompt
fputc('\n', stdout);
break;
}
ST::string cmdline = ST::string(cmdbuf).before_first('#').trim();
std::vector<ST::string> args = cmdline.tokenize();
if (args.size() == 0) {
free(cmdbuf);
continue;
}
add_history(cmdbuf);
ST::string arg_str;
if (cmdline.size() > args.front().size() + 1)
arg_str = ST::string(cmdbuf + args.front().size() + 1);
free(cmdbuf);
if (args[0] == "quit") {
break;
} else if (args[0] == "restart") {
if (args.size() < 2) {
fputs("Error: No services specified\n", stderr);
continue;
}
for (auto svc = args.begin() + 1; svc != args.end(); ++svc) {
if (*svc == "lobby") {
DS::StopLobby();
DS::StartLobby();
} else if (*svc == "auth") {
DS::AuthServer_Shutdown();
DS::AuthServer_Init();
fputs("Auth server restarted\n", stdout);
} else if (*svc == "status") {
DS::StopStatusHTTP();
DS::StartStatusHTTP();
} else {
ST::printf(stderr, "Error: Service {} cannot be restarted\n", *svc);
}
}
} else if (args[0] == "keygen") {
if (args.size() != 2) {
fputs("Usage: keygen <new|show>\n", stderr);
} else if (args[1] == "new") {
generate_keys();
} else if (args[1] == "show") {
uint8_t xbuffer[64];
DS::CryptCalcX(xbuffer, DS::Settings::CryptKey(DS::e_KeyAuth_N),
DS::Settings::CryptKey(DS::e_KeyAuth_K), CRYPT_BASE_AUTH);
ST::printf("Server.Auth.N \"{}\"\n", ST::base64_encode(DS::Settings::CryptKey(DS::e_KeyAuth_N), 64));
ST::printf("Server.Auth.X \"{}\"\n", ST::base64_encode(xbuffer, 64));
DS::CryptCalcX(xbuffer, DS::Settings::CryptKey(DS::e_KeyGame_N),
DS::Settings::CryptKey(DS::e_KeyGame_K), CRYPT_BASE_GAME);
ST::printf("Server.Game.N \"{}\"\n", ST::base64_encode(DS::Settings::CryptKey(DS::e_KeyGame_N), 64));
ST::printf("Server.Game.X \"{}\"\n", ST::base64_encode(xbuffer, 64));
DS::CryptCalcX(xbuffer, DS::Settings::CryptKey(DS::e_KeyGate_N),
DS::Settings::CryptKey(DS::e_KeyGate_K), CRYPT_BASE_GATE);
ST::printf("Server.Gate.N \"{}\"\n", ST::base64_encode(DS::Settings::CryptKey(DS::e_KeyGate_N), 64));
ST::printf("Server.Gate.X \"{}\"\n", ST::base64_encode(xbuffer, 64));
} else {
fputs("Error: keygen parameter should be 'new' or 'show'\n", stderr);
continue;
}
} else if (args[0] == "clients") {
DS::GateKeeper_DisplayClients();
DS::FileServer_DisplayClients();
DS::AuthServer_DisplayClients();
DS::GameServer_DisplayClients();
} else if (args[0] == "commdebug") {
#ifdef DEBUG
if (args.size() == 1)
ST::printf("Comm debugging is currently {}\n", s_commdebug ? "on" : "off");
else if (args[1] == "on")
s_commdebug = true;
else if (args[1] == "off")
s_commdebug = false;
else
fputs("Error: must specify on or off\n", stderr);
#else
fputs("Error: COMM debugging is only enabled in debug builds\n", stderr);
#endif
} else if (args[0] == "addacct") {
if (args.size() != 3) {
fputs("Usage: addacct <user> <password>\n", stdout);
continue;
}
if (!DS::AuthServer_AddAcct(args[1], args[2]))
fputs("Account was not added.\n", stderr);
} else if (args[0] == "modacct") {
if (args.size() < 2) {
fputs("Usage: modacct <user> [flag]\n", stdout);
continue;
}
uint32_t flags = 0;
for (size_t i = 2; i < args.size(); ++i) {
if (args[i] == "admin")
flags |= DS::e_AcctAdmin;
else if (args[i] == "banned")
flags |= DS::e_AcctBanned;
else if (args[i] == "beta")
flags |= DS::e_AcctBetaTester;
else
ST::printf(stderr, "Warning: Unrecognized account flag \"{}\"\n", args[i]);
}
flags = DS::AuthServer_AcctFlags(args[1], flags);
if (flags == static_cast<uint32_t>(-1)) {
ST::printf(stderr, "Error: Failed to set account flags for {}\n", args[1]);
continue;
}
ST::printf("{}:", args[1]);
if (flags & DS::e_AcctAdmin)
fputs(" [admin]", stdout);
if (flags & DS::e_AcctBanned)
fputs(" [banned]", stdout);
if (flags & DS::e_AcctBetaTester)
fputs(" [beta]", stdout);
if (!(flags & DS::e_AcctMask))
fputs(" [none]", stdout);
fputs("\n", stdout);
} else if (args[0] == "restrict") {
bool result = DS::AuthServer_RestrictLogins();
ST::printf("Logins are {}\n", result ? "restricted" : "unrestricted");
} else if (args[0] == "welcome") {
if (!DS::Settings::StatusEnabled())
fputs("Warning: Status server disabled. "
"Setting a welcome message has no effect.\n", stderr);
DS::Settings::SetWelcomeMsg(arg_str);
} else if (args[0] == "addallplayers") {
if (args.size() < 2) {
fputs("Usage: addallplayers [playerId]\n", stdout);
continue;
}
if (!DS::AuthServer_AddAllPlayersFolder(args[1].to_uint()))
ST::printf(stderr, "Couldn't add the AllPlayers folder to {}", args[1].to_uint());
} else if (args[0] == "globalsdl") {
if (args.size() < 3) {
fputs("Usage: globalsdl <ageName> <variable> <value>\n", stdout);
continue;
}
ST::string value;
if (args.size() > 3)
value = args[3];
if (!DS::AuthServer_ChangeGlobalSDL(args[1], args[2], value))
ST::printf(stderr, "Error: Failed to change variable '{}'\n", args[2]);
} else if (args[0] == "help") {
fputs("DirtSand v1.0 Console supported commands:\n"
" addacct <user> <password>\n"
" addallplayers <playerId>\n"
" clients\n"
" commdebug <on|off>\n"
" globalsdl <ageName> <variable> <value>\n"
" help\n"
" keygen <new|show>\n"
" modacct <user> [flag]\n"
" quit\n"
" restart <auth|lobby|status> [...]\n"
" restrict\n"
" welcome <message>\n",
stdout);
} else {
ST::printf(stderr, "Error: Unrecognized command: {}\n", args[0]);
}
}
if (DS::Settings::StatusEnabled())
DS::StopStatusHTTP();
DS::StopLobby();
DS::GateKeeper_Shutdown();
DS::GameServer_Shutdown();
DS::AuthServer_Shutdown();
DS::FileServer_Shutdown();
return 0;
}