client_main.c

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/***********************************************************************
 Freeciv - Copyright (C) 1996 - A Kjeldberg, L Gregersen, P Unold
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.
 
   This program 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 General Public License for more details.
***********************************************************************/
 
#ifdef HAVE_CONFIG_H
#include <fc_config.h>
#endif
 
#include <math.h>
#include <signal.h>
#include <stdarg.h>
#include <stdlib.h>
#include <time.h>
 
/* utility */
#include "bitvector.h"
#include "capstr.h"
#include "dataio.h"
#include "deprecations.h"
#include "executable.h"
#include "fcbacktrace.h"
#include "fc_cmdline.h"
#include "fciconv.h"
#include "fcintl.h"
#include "log.h"
#include "mem.h"
#include "rand.h"
#include "registry.h"
#include "support.h"
#include "timing.h"
 
/* common */
#include "ai.h"
#include "diptreaty.h"
#include "fc_cmdhelp.h"
#include "fc_interface.h"
#include "game.h"
#include "idex.h"
#include "map.h"
#include "mapimg.h"
#include "modpack.h"
#include "netintf.h"
#include "packets.h"
#include "player.h"
#include "research.h"
#include "server_settings.h"
#include "version.h"
 
/* client/include */
#include "chatline_g.h"
#include "citydlg_g.h"
#include "connectdlg_g.h"
#include "dialogs_g.h"
#include "diplodlg_g.h"
#include "editgui_g.h"
#include "graphics_g.h"
#include "gui_main_g.h"
#include "mapctrl_g.h"
#include "mapview_g.h"
#include "menu_g.h"
#include "messagewin_g.h"
#include "pages_g.h"
#include "plrdlg_g.h"
#include "repodlgs_g.h"
#include "voteinfo_bar_g.h"
 
/* client */
#include "attribute.h"
#include "audio.h"
#include "cityrepdata.h"
#include "climisc.h"
#include "clinet.h"
#include "connectdlg_common.h"  /* client_kill_server() */
#include "control.h"
#include "editor.h"
#include "global_worklist.h"
#include "gui_properties.h"
#include "helpdata.h"           /* boot_help_texts() */
#include "mapview_common.h"
#include "music.h"
#include "options.h"
#include "overview_common.h"
#include "packhand.h"
#include "svgflag.h"
#include "tilespec.h"
#include "themes_common.h"
#include "update_queue.h"
#include "voteinfo.h"
#include "zoom.h"
 
/* client/agents */
#include "agents.h"
#include "cma_core.h"           /* kludge */
 
/* client/luascript */
#include "script_client.h"
 
#include "client_main.h"
 
 
static enum known_type mapimg_client_tile_known(const struct tile *ptile,
                                                const struct player *pplayer,
                                                bool knowledge);
static struct terrain
  *mapimg_client_tile_terrain(const struct tile *ptile,
                              const struct player *pplayer, bool knowledge);
static struct player *mapimg_client_tile_owner(const struct tile *ptile,
                                               const struct player *pplayer,
                                               bool knowledge);
static struct player *mapimg_client_tile_city(const struct tile *ptile,
                                              const struct player *pplayer,
                                              bool knowledge);
static struct player *mapimg_client_tile_unit(const struct tile *ptile,
                                              const struct player *pplayer,
                                              bool knowledge);
static int mapimg_client_plrcolor_count(void);
static struct rgbcolor *mapimg_client_plrcolor_get(int i);
 
static void fc_interface_init_client(void);
 
static void cache_tilesets(void);
 
char *logfile = NULL;
char *scriptfile = NULL;
char *savefile = NULL;
char forced_tileset_name[512] = "\0";
char sound_plugin_name[512] = "\0";
char sound_set_name[512] = "\0";
char music_set_name[512] = "\0";
char server_host[512] = "\0";
char user_name[512] = "\0";
char fc_password[MAX_LEN_PASSWORD] = "\0";
char metaserver[512] = "\0";
int  server_port = -1;
bool auto_connect = FALSE; /* TRUE = skip "Connect to Freeciv Server" dialog */
bool auto_spawn = FALSE; /* TRUE = skip main menu, start local server */
enum announce_type announce;
 
struct civclient client;
 
static enum client_states civclient_state = C_S_INITIAL;
 
/* TRUE if an end turn request is blocked by busy agents */
bool waiting_for_end_turn = FALSE;
 
/*
 * TRUE between receiving PACKET_END_TURN and PACKET_BEGIN_TURN
 */
static bool server_busy = FALSE;
 
#ifdef FREECIV_DEBUG
bool hackless = FALSE;
#endif
 
static bool client_quitting = FALSE;
 
/**********************************************************************/
static char *put_conv(const char *src, size_t *length)
{
  char *out = internal_to_data_string_malloc(src);
 
  if (out) {
    *length = strlen(out);
    return out;
  } else {
    *length = 0;
    return NULL;
  }
}
 
/**********************************************************************/
static bool get_conv(char *dst, size_t ndst,
                     const char *src, size_t nsrc)
{
  char *out = data_to_internal_string_malloc(src);
  bool ret = TRUE;
  size_t len;
 
  if (!out) {
    dst[0] = '\0';
    return FALSE;
  }
 
  len = strlen(out);
  if (ndst > 0 && len >= ndst) {
    ret = FALSE;
    len = ndst - 1;
  }
 
  memcpy(dst, out, len);
  dst[len] = '\0';
  free(out);
 
  return ret;
}
 
/**********************************************************************/
static void charsets_init(void)
{
  dio_set_put_conv_callback(put_conv);
  dio_set_get_conv_callback(get_conv);
}
 
/**********************************************************************/
static void emergency_exit(void)
{
  client_kill_server(TRUE);
}
 
/**********************************************************************/
static void at_exit(void)
{
  emergency_exit();
  packets_deinit();
  fc_shutdown_network();
  update_queue_free();
  fc_destroy_ow_mutex();
}
 
/**********************************************************************/
static void client_game_init(void)
{
  client.conn.playing = NULL;
  client.conn.observer = FALSE;
 
  game_init(FALSE);
  attribute_init();
  agents_init();
  control_init();
  link_marks_init();
  voteinfo_queue_init();
  server_options_init();
  update_queue_init();
  mapimg_init(mapimg_client_tile_known, mapimg_client_tile_terrain,
              mapimg_client_tile_owner, mapimg_client_tile_city,
              mapimg_client_tile_unit, mapimg_client_plrcolor_count,
              mapimg_client_plrcolor_get);
  animations_init();
}
 
/**********************************************************************/
static void client_game_free(void)
{
  editgui_popdown_all();
 
  animations_free();
  mapimg_free();
  packhand_free();
  server_options_free();
  voteinfo_queue_free();
  link_marks_free();
  control_free();
  free_help_texts();
  attribute_free();
  agents_free();
  game.client.ruleset_init = FALSE;
  game.client.ruleset_ready = FALSE;
  game_free();
  /* update_queue_init() is correct at this point. The queue is reset to
     a clean state which is also needed if the client is not connected to
     the server! */
  update_queue_init();
 
  client.conn.playing = NULL;
  client.conn.observer = FALSE;
}
 
/**********************************************************************/
static void client_game_reset(void)
{
  editgui_popdown_all();
 
  packhand_free();
  link_marks_free();
  control_free();
  attribute_free();
  agents_free();
 
  game_reset();
  mapimg_reset();
 
  attribute_init();
  agents_init();
  control_init();
  link_marks_init();
}
 
/**********************************************************************/
int default_tileset_select(void)
{
  fill_topo_ts_default();
 
  if (forced_tileset_name[0] != '\0') {
    if (!tilespec_try_read(forced_tileset_name, TRUE, -1, TRUE)) {
      log_error(_("Can't load requested tileset %s!"), forced_tileset_name);
      client_exit(EXIT_FAILURE);
      return EXIT_FAILURE;
    }
  } else {
    if (gui_options.default_tileset_name[0] == '\0') {
      /* Use topology by default */
      tilespec_try_read(tileset_name_for_topology(index_ts_topology(gui_options.default_topology)),
                        FALSE, -1, TRUE);
    } else {
      tilespec_try_read(gui_options.default_tileset_name, FALSE, -1, TRUE);
    }
  }
 
  editor_init();
 
  return EXIT_SUCCESS;
}
 
/**********************************************************************/
int client_main(int argc, char *argv[], bool postpone_tileset)
{
  int i;
  enum log_level loglevel = LOG_NORMAL;
  int ui_options = 0;
  bool ui_separator = FALSE;
  char *option = NULL;
  int fatal_assertions = -1;
  int aii;
  int uret;
 
  executable_init();
 
  /* fc_interface_init_client() includes low level support like
   * guaranteeing that fc_vsnprintf() will work after it,
   * so this need to be early. */
  fc_interface_init_client();
 
  i_am_client(); /* Tell to libfreeciv that we are client */
 
  game.client.ruleset_init = FALSE;
 
  /* Ensure that all AIs are initialized to unused state
   * Not using ai_type_iterate as it would stop at
   * current ai type count, ai_type_get_count(), i.e., 0 */
  for (aii = 0; aii < FREECIV_AI_MOD_LAST; aii++) {
    struct ai_type *ai = get_ai_type(aii);
 
    init_ai(ai);
  }
 
#ifdef ENABLE_NLS
  (void) bindtextdomain("freeciv-nations", get_locale_dir());
#endif
 
  registry_module_init();
  audio_init();
  init_character_encodings(gui_character_encoding, gui_use_transliteration);
#ifdef ENABLE_NLS
  bind_textdomain_codeset("freeciv-nations", get_internal_encoding());
#endif
 
  gui_properties_init();
 
  i = 1;
 
  announce = ANNOUNCE_DEFAULT;
 
  while (i < argc) {
    if (ui_separator) {
      argv[1 + ui_options] = argv[i];
      ui_options++;
    } else if (is_option("--help", argv[i])) {
      struct cmdhelp *help = cmdhelp_new(argv[0]);
 
      cmdhelp_add(help, "A",
                  /* TRANS: "Announce" is exactly what user must type, do not translate. */
                  _("Announce PROTO"),
                  _("Announce game in LAN using protocol PROTO "
                    "(IPv4/IPv6/none)"));
      cmdhelp_add(help, "a", "autoconnect",
                  _("Skip connect dialog"));
#ifdef FREECIV_DEBUG
      cmdhelp_add(help, "d",
                  /* TRANS: "debug" is exactly what user must type, do not translate. */
                  _("debug LEVEL"),
                  _("Set debug log level (one of f,e,w,n,v,d, or "
                    "d:file1,min,max:...)"));
#else  /* FREECIV_DEBUG */
      cmdhelp_add(help, "d",
                  /* TRANS: "debug" is exactly what user must type, do not translate. */
                  _("debug LEVEL"),
                  _("Set debug log level (one of f,e,w,n,v)"));
#endif /* FREECIV_DEBUG */
#ifndef FREECIV_NDEBUG
      cmdhelp_add(help, "F",
                  /* TRANS: "Fatal" is exactly what user must type, do not translate. */
                  _("Fatal [SIGNAL]"),
                  _("Raise a signal on failed assertion"));
#endif /* FREECIV_NDEBUG */
      cmdhelp_add(help, "f",
                  /* TRANS: "file" is exactly what user must type, do not translate. */
                  _("file FILE"),
                  _("Load saved game FILE"));
      cmdhelp_add(help, "h", "help",
                  _("Print a summary of the options"));
#ifdef FREECIV_DEBUG
      cmdhelp_add(help, "H", "Hackless",
                  _("Do not request hack access to local server"));
#endif /* FREECIV_DEBUG */
      cmdhelp_add(help, "l",
                  /* TRANS: "log" is exactly what user must type, do not translate. */
                  _("log FILE"),
                  _("Use FILE as logfile (spawned server also uses this)"));
      cmdhelp_add(help, "M",
                  /* TRANS: "Meta" is exactly what user must type, do not translate. */
                  _("Meta HOST"),
                  _("Connect to the metaserver at HOST"));
      cmdhelp_add(help, "n",
                  /* TRANS: "name" is exactly what user must type, do not translate. */
                  _("name NAME"),
                  _("Use NAME as username on server"));
      cmdhelp_add(help, "p",
                  /* TRANS: "port" is exactly what user must type, do not translate. */
                  _("port PORT"),
                  _("Connect to server port PORT (usually with -a)"));
      cmdhelp_add(help, "P",
                  /* TRANS: "Plugin" is exactly what user must type, do not translate. */
                  _("Plugin PLUGIN"),
                  _("Use PLUGIN for sound output %s"),
                  audio_get_all_plugin_names());
      cmdhelp_add(help, "r",
                  /* TRANS: "read" is exactly what user must type, do not translate. */
                  _("read FILE"),
                  _("Read startup script FILE (for spawned server only)"));
      cmdhelp_add(help, "s",
                  /* TRANS: "server" is exactly what user must type, do not translate. */
                  _("server HOST"),
                  _("Connect to the server at HOST (usually with -a)"));
      cmdhelp_add(help, "S",
                  /* TRANS: "Sound" is exactly what user must type, do not translate. */
                  _("Sound FILE"),
                  _("Read sound tags from FILE"));
      cmdhelp_add(help, "m",
                  /* TRANS: "music" is exactly what user must type, do not translate. */
                  _("music FILE"),
                  _("Read music tags from FILE"));
      cmdhelp_add(help, "t",
                  /* TRANS: "tiles" is exactly what user must type, do not translate. */
                  _("tiles FILE"),
                  _("Use data file FILE.tilespec for tiles"));
      cmdhelp_add(help, "v", "version",
                  _("Print the version number"));
      cmdhelp_add(help, "w", "warnings",
                  _("Warn about deprecated modpack constructs"));
 
      /* The function below prints a header and footer for the options.
       * Furthermore, the options are sorted. */
      cmdhelp_display(help, TRUE, TRUE, TRUE);
      cmdhelp_destroy(help);
 
      exit(EXIT_SUCCESS);
    } else if (is_option("--version", argv[i])) {
      fc_fprintf(stderr, "%s %s\n", freeciv_name_version(), client_string);
      exit(EXIT_SUCCESS);
#ifdef FREECIV_DEBUG
    } else if (is_option("--Hackless", argv[i])) {
      hackless = TRUE;
#endif /* FREECIV_DEBUG */
    } else if ((option = get_option_malloc("--log", argv, &i, argc, TRUE))) {
      logfile = option;
#ifndef FREECIV_NDEBUG
    } else if (is_option("--Fatal", argv[i])) {
      if (i + 1 >= argc || '-' == argv[i + 1][0]) {
        fatal_assertions = SIGABRT;
      } else if (str_to_int(argv[i + 1], &fatal_assertions)) {
        i++;
      } else {
        fc_fprintf(stderr, _("Invalid signal number \"%s\".\n"),
                   argv[i + 1]);
        fc_fprintf(stderr, _("Try using --help.\n"));
        exit(EXIT_FAILURE);
      }
#endif /* FREECIV_NDEBUG */
    } else  if ((option = get_option_malloc("--read", argv, &i, argc, TRUE))) {
      scriptfile = option;
    } else if ((option = get_option_malloc("--file", argv, &i, argc, TRUE))) {
      savefile = option;
      auto_spawn = TRUE;
    } else if ((option = get_option_malloc("--name", argv, &i, argc, FALSE))) {
      sz_strlcpy(user_name, option);
      free(option);
    } else if ((option = get_option_malloc("--Meta", argv, &i, argc, FALSE))) {
      sz_strlcpy(metaserver, option);
      free(option);
    } else if ((option = get_option_malloc("--Sound", argv, &i, argc, FALSE))) {
      sz_strlcpy(sound_set_name, option);
      free(option);
    } else if ((option = get_option_malloc("--music", argv, &i, argc, FALSE))) {
      sz_strlcpy(music_set_name, option);
      free(option);
    } else if ((option = get_option_malloc("--Plugin", argv, &i, argc, FALSE))) {
      sz_strlcpy(sound_plugin_name, option);
      free(option);
    } else if ((option = get_option_malloc("--port", argv, &i, argc, FALSE))) {
      if (!str_to_int(option, &server_port)) {
        fc_fprintf(stderr,
                   _("Invalid port \"%s\" specified with --port option.\n"),
                   option);
        fc_fprintf(stderr, _("Try using --help.\n"));
        exit(EXIT_FAILURE);
      }
      free(option);
    } else if ((option = get_option_malloc("--server", argv, &i, argc, FALSE))) {
      sz_strlcpy(server_host, option);
      free(option);
    } else if (is_option("--autoconnect", argv[i])) {
      auto_connect = TRUE;
    } else if ((option = get_option_malloc("--debug", argv, &i, argc, FALSE))) {
      if (!log_parse_level_str(option, &loglevel)) {
        fc_fprintf(stderr,
                   _("Invalid debug level \"%s\" specified with --debug "
                     "option.\n"), option);
        fc_fprintf(stderr, _("Try using --help.\n"));
        exit(EXIT_FAILURE);
      }
      free(option);
    } else if ((option = get_option_malloc("--tiles", argv, &i, argc, FALSE))) {
      sz_strlcpy(forced_tileset_name, option);
      free(option);
    } else if ((option = get_option_malloc("--Announce", argv, &i, argc, FALSE))) {
      if (!fc_strcasecmp(option, "ipv4")) {
        announce = ANNOUNCE_IPV4;
      } else if (!fc_strcasecmp(option, "none")) {
        announce = ANNOUNCE_NONE;
#ifdef FREECIV_IPV6_SUPPORT
      } else if (!fc_strcasecmp(option, "ipv6")) {
        announce = ANNOUNCE_IPV6;
#endif /* IPv6 support */
      } else {
        fc_fprintf(stderr, _("Invalid announce protocol \"%s\".\n"), option);
        exit(EXIT_FAILURE);
      }
      free(option);
    } else if (is_option("--warnings", argv[i])) {
      deprecation_warnings_enable();
    } else if (is_option("--", argv[i])) {
      ui_separator = TRUE;
    } else {
      fc_fprintf(stderr, _("Unrecognized option: \"%s\"\n"), argv[i]);
      exit(EXIT_FAILURE);
    }
    i++;
  } /* of while */
 
  if (auto_spawn && auto_connect) {
    /* TRANS: don't translate option names */
    fc_fprintf(stderr, _("-f/--file and -a/--autoconnect options are "
                         "incompatible\n"));
    exit(EXIT_FAILURE);
  }
 
  /* Remove all options except those intended for the UI. */
  argv[1 + ui_options] = NULL;
  argc = 1 + ui_options;
 
  /* Disallow running as root -- too dangerous */
  dont_run_as_root(argv[0], "freeciv_client");
 
  log_init(logfile, loglevel, NULL, NULL, fatal_assertions);
  backtrace_init();
 
  /* After log_init: */
 
  (void)user_username(gui_options.default_user_name, MAX_LEN_NAME);
  if (!is_valid_username(gui_options.default_user_name)) {
    char buf[sizeof(gui_options.default_user_name)];
 
    fc_snprintf(buf, sizeof(buf), "_%s", gui_options.default_user_name);
    if (is_valid_username(buf)) {
      sz_strlcpy(gui_options.default_user_name, buf);
    } else {
      fc_snprintf(gui_options.default_user_name,
                  sizeof(gui_options.default_user_name),
                  "player%d", fc_rand(10000));
    }
  }
 
  /* Initialization */
 
  game.all_connections = conn_list_new();
  game.est_connections = conn_list_new();
 
  ui_init();
  charsets_init();
  fc_init_network();
  update_queue_init();
 
  fc_init_ow_mutex();
 
  /* Register exit handler */
  atexit(at_exit);
  fc_at_quick_exit(emergency_exit);
 
  init_our_capability();
  init_player_dlg_common();
  init_themes();
 
  options_init();
  options_load();
 
  script_client_init();
 
  if (sound_set_name[0] == '\0') {
    sz_strlcpy(sound_set_name, gui_options.default_sound_set_name);
  }
  if (music_set_name[0] == '\0') {
    sz_strlcpy(music_set_name, gui_options.default_music_set_name);
  }
  if (sound_plugin_name[0] == '\0') {
    sz_strlcpy(sound_plugin_name, gui_options.default_sound_plugin_name);
  }
  if (server_host[0] == '\0') {
    sz_strlcpy(server_host, gui_options.default_server_host);
  } else if (gui_options.use_prev_server) {
    sz_strlcpy(gui_options.default_server_host, server_host);
  }
  if (user_name[0] == '\0') {
    sz_strlcpy(user_name, gui_options.default_user_name);
  }
  if (metaserver[0] == '\0') {
    if (0 == strcmp(gui_options.default_metaserver, DEFAULT_METASERVER_OPTION)) {
      sz_strlcpy(metaserver, FREECIV_META_URL);
    } else {
      sz_strlcpy(metaserver, gui_options.default_metaserver);
    }
  }
  if (server_port == -1) {
    server_port = gui_options.default_server_port;
  } else if (gui_options.use_prev_server) {
    gui_options.default_server_port = server_port;
  }
 
  /* This seed is not saved anywhere; randoms in the client should
     have cosmetic effects only (eg city name suggestions).  --dwp */
  fc_srand(time(NULL));
  helpdata_init();
  boot_help_texts();
 
  modpacks_init();
  cache_tilesets();
 
  audio_real_init(sound_set_name, music_set_name, sound_plugin_name);
  start_menu_music("music_menu", NULL);
 
  if (!postpone_tileset) {
    int tsret = default_tileset_select();
 
    if (tsret != EXIT_SUCCESS) {
      return tsret;
    }
  }
 
  /* Run gui-specific client */
  uret = ui_main(argc, argv);
 
  modpacks_free();
 
  /* Termination */
  client_exit(uret);
 
  /* Not reached */
  return EXIT_SUCCESS;
}
 
/**********************************************************************/
static void log_option_save_msg(enum log_level lvl, const char *msg, ...)
{
  va_list args;
 
  va_start(args, msg);
  log_va_list(lvl, msg, args);
  va_end(args);
}
 
/**********************************************************************/
void fc__noreturn client_exit(int return_value)
{
  if (client_state() >= C_S_PREPARING) {
    attribute_flush();
    client_remove_all_cli_conn();
  }
 
  if (gui_options.save_options_on_exit) {
    options_save(log_option_save_msg);
  }
 
  overview_free();
  if (unscaled_tileset != NULL) {
    tileset_free(unscaled_tileset);
  }
  if (tileset != NULL) {
    tileset_free(tileset);
  }
 
  ui_exit();
 
  /* Play the exit sound while audio system dependencies still up. */
  audio_shutdown(TRUE);
 
  script_client_free();
 
  editor_free();
  options_free();
  if (client_state() >= C_S_PREPARING) {
    client_game_free();
  }
 
  helpdata_done(); /* client_exit() unlinks help text list */
  conn_list_destroy(game.all_connections);
  conn_list_destroy(game.est_connections);
 
  free_svg_flag_API();
  registry_module_close();
  libfreeciv_free();
 
  backtrace_deinit();
  log_close();
  cmdline_option_values_free();
 
  exit(return_value);
}
 
/**********************************************************************/
void client_packet_input(void *packet, int type)
{
  if (!client.conn.established
      && PACKET_CONN_PING != type
      && PACKET_PROCESSING_STARTED != type
      && PACKET_PROCESSING_FINISHED != type
      && PACKET_SERVER_JOIN_REPLY != type
      && PACKET_AUTHENTICATION_REQ != type
      && PACKET_SERVER_SHUTDOWN != type
      && PACKET_CONNECT_MSG != type
      && PACKET_EARLY_CHAT_MSG != type
      && PACKET_SERVER_INFO != type) {
    log_error("Received packet %s (%d) before establishing connection!",
              packet_name(type), type);
    disconnect_from_server(FALSE);
  } else if (!client_handle_packet(type, packet)) {
    log_error("Received unknown packet (type %d) from server!", type);
    disconnect_from_server(FALSE);
  }
}
 
/**********************************************************************/
void user_ended_turn(void)
{
  send_turn_done();
}
 
/**********************************************************************/
void send_turn_done(void)
{
  log_debug("send_turn_done() can_end_turn=%d",
            can_end_turn());
 
  if (!can_end_turn()) {
    /*
     * The turn done button is disabled but the user may have pressed
     * the return key.
     */
 
    if (agents_busy()) {
      waiting_for_end_turn = TRUE;
    }
 
    return;
  }
 
  waiting_for_end_turn = FALSE;
 
  attribute_flush();
 
  dsend_packet_player_phase_done(&client.conn, game.info.turn);
 
  update_turn_done_button_state();
}
 
/**********************************************************************/
void send_report_request(enum report_type type)
{
  dsend_packet_report_req(&client.conn, type);
}
 
/**********************************************************************/
void set_client_state(enum client_states newstate)
{
  enum client_states oldstate = civclient_state;
  struct player *pplayer = client_player();
 
  if (auto_spawn) {
    fc_assert(!auto_connect);
    auto_spawn = FALSE;
    if (!client_start_server()) {
      log_fatal(_("Failed to start local server; aborting."));
      exit(EXIT_FAILURE);
    }
  }
 
  if (auto_connect && newstate == C_S_DISCONNECTED) {
    if (oldstate == C_S_DISCONNECTED) {
      log_fatal(_("There was an error while auto connecting; aborting."));
        exit(EXIT_FAILURE);
    } else {
      start_autoconnecting_to_server();
      auto_connect = FALSE;     /* Don't try this again. */
    }
  }
 
  if (C_S_PREPARING == newstate
      && (client_has_player() || client_is_observer())) {
    /* Reset the delta-state. */
    conn_reset_delta_state(&client.conn);
  }
 
  if (oldstate == newstate) {
    return;
  }
 
  if (oldstate == C_S_RUNNING && newstate != C_S_PREPARING) {
    stop_style_music();
 
    if (!is_client_quitting()) {
      /* Back to menu */
      start_menu_music("music_menu", NULL);
    }
  }
 
  civclient_state = newstate;
 
  switch (newstate) {
  case C_S_INITIAL:
    log_error("%d is not a valid client state to set.", C_S_INITIAL);
    break;
 
  case C_S_DISCONNECTED:
    popdown_all_city_dialogs();
    close_all_diplomacy_dialogs();
    popdown_all_game_dialogs();
    meswin_clear_older(MESWIN_CLEAR_ALL, 0);
 
    if (oldstate > C_S_DISCONNECTED) {
      unit_focus_set(NULL);
      agents_disconnect();
      editor_clear();
      global_worklists_unbuild();
      client_remove_all_cli_conn();
      client_game_free();
      if (oldstate > C_S_PREPARING) {
        options_dialogs_update();
      }
    }
 
    set_client_page(PAGE_MAIN);
    break;
 
  case C_S_PREPARING:
    popdown_all_city_dialogs();
    close_all_diplomacy_dialogs();
    popdown_all_game_dialogs();
    meswin_clear_older(MESWIN_CLEAR_ALL, 0);
 
    if (oldstate < C_S_PREPARING) {
      client_game_init();
    } else {
      /* From an upper state means that we didn't quit the server,
       * so a lot of information is still in effect. */
      client_game_reset();
      options_dialogs_update();
    }
 
    unit_focus_set(NULL);
 
    if (get_client_page() != PAGE_SCENARIO
        && get_client_page() != PAGE_LOAD) {
      set_client_page(PAGE_START);
    }
    break;
 
  case C_S_RUNNING:
    if (oldstate == C_S_PREPARING) {
      popdown_races_dialog();
      stop_menu_music();     /* Stop intro sound loop. */
    }
 
    init_city_report_game_data();
    options_dialogs_set();
    create_event(NULL, E_GAME_START, ftc_client, _("Game started."));
    if (pplayer) {
      research_update(research_get(pplayer));
    }
    role_unit_precalcs();
    boot_help_texts();   /* Reboot with player */
    global_worklists_build();
    can_slide = FALSE;
    unit_focus_update();
    can_slide = TRUE;
    set_client_page(PAGE_GAME);
    /* Find something sensible to display instead of the intro gfx. */
    center_on_something();
    agents_game_start();
    editgui_tileset_changed();
    voteinfo_gui_update();
 
    refresh_overview_canvas();
 
    update_info_label();        /* Get initial population right */
    unit_focus_update();
    update_unit_info_label(get_units_in_focus());
 
    if (gui_options.auto_center_each_turn) {
      center_on_something();
    }
    start_style_music();
    audio_play_sound("e_enter_game", NULL, NULL);
    break;
 
  case C_S_OVER:
    if (C_S_RUNNING == oldstate) {
      /* Extra kludge for end-game handling of the CMA. */
      if (pplayer && pplayer->cities) {
        city_list_iterate(pplayer->cities, pcity) {
          if (cma_is_city_under_agent(pcity, NULL)) {
            cma_release_city(pcity);
          }
        } city_list_iterate_end;
      }
      popdown_all_city_dialogs();
      close_all_diplomacy_dialogs();
      popdown_all_game_dialogs();
      unit_focus_set(NULL);
    } else {
      /* From C_S_PREPARING. */
      init_city_report_game_data();
      options_dialogs_set();
      if (pplayer) {
        research_update(research_get(pplayer));
      }
      role_unit_precalcs();
      boot_help_texts();            /* reboot */
      global_worklists_build();
      unit_focus_set(NULL);
      set_client_page(PAGE_GAME);
      center_on_something();
    }
    refresh_overview_canvas();
 
    update_info_label();
    unit_focus_update();
    update_unit_info_label(NULL);
 
    break;
  }
 
  menus_init();
  update_turn_done_button_state();
  conn_list_dialog_update();
  if (can_client_change_view()) {
    update_map_canvas_visible();
  }
 
  /* If turn was going to change, that is now aborted. */
  set_server_busy(FALSE);
}
 
/**********************************************************************/
enum client_states client_state(void)
{
  return civclient_state;
}
 
/**********************************************************************/
void client_remove_cli_conn(struct connection *pconn)
{
  fc_assert_msg(pconn != NULL,
                "Trying to remove a non existing connection");
 
  if (NULL != pconn->playing) {
    conn_list_remove(pconn->playing->connections, pconn);
  }
  conn_list_remove(game.all_connections, pconn);
  conn_list_remove(game.est_connections, pconn);
  fc_assert_ret(pconn != &client.conn);
  free(pconn);
}
 
/**********************************************************************/
void client_remove_all_cli_conn(void)
{
  fc_assert_msg(game.all_connections != NULL,
                "Connection list missing");
 
  while (conn_list_size(game.all_connections) > 0) {
    struct connection *pconn = conn_list_get(game.all_connections, 0);
    client_remove_cli_conn(pconn);
  }
}
 
/**********************************************************************/
void send_attribute_block_request(void)
{
  send_packet_player_attribute_block(&client.conn);
}
 
/**********************************************************************/
void wait_till_request_got_processed(int request_id)
{
  input_from_server_till_request_got_processed(client.conn.sock,
                                               request_id);
}
 
/**********************************************************************/
bool client_is_observer(void)
{
  return client.conn.established && client.conn.observer;
}
 
/* Seconds_to_turndone is the number of seconds the server has told us
 * are left.  The timer tells exactly how much time has passed since the
 * server gave us that data. */
static double seconds_to_turndone = 0.0;
static struct timer *turndone_timer;
 
/* The timer tells how long since server informed us about starting
 * turn-change activities. */
static struct timer *between_turns = NULL;
static bool waiting_turn_change = FALSE;
 
/* This value shows what value the timeout label is currently showing for
 * the seconds-to-turndone. */
static int seconds_shown_to_turndone;
static int seconds_shown_to_new_turn;
 
/**********************************************************************/
void set_seconds_to_turndone(double seconds)
{
  if (current_turn_timeout() > 0) {
    seconds_to_turndone = seconds;
    turndone_timer = timer_renew(turndone_timer, TIMER_USER, TIMER_ACTIVE,
                                 turndone_timer != NULL ? NULL : "turndone");
    timer_start(turndone_timer);
 
    /* Maybe we should do an update_timeout_label here, but it doesn't
     * seem to be necessary. */
    seconds_shown_to_turndone = ceil(seconds + 0.1);
  }
}
 
/**********************************************************************/
bool is_waiting_turn_change(void)
{
  return waiting_turn_change;
}
 
/**********************************************************************/
void start_turn_change_wait(void)
{
  seconds_shown_to_new_turn = ceil(game.tinfo.last_turn_change_time + 0.1);
  between_turns = timer_renew(between_turns, TIMER_USER, TIMER_ACTIVE,
                              between_turns != NULL ? NULL : "between turns");
  timer_start(between_turns);
 
  waiting_turn_change = TRUE;
}
 
/**********************************************************************/
void stop_turn_change_wait(void)
{
  waiting_turn_change = FALSE;
  update_timeout_label();
}
 
/**********************************************************************/
int get_seconds_to_turndone(void)
{
  if (current_turn_timeout() > 0) {
    return seconds_shown_to_turndone;
  } else {
    /* This shouldn't happen. */
    return FC_INFINITY;
  }
}
 
/**********************************************************************/
int get_seconds_to_new_turn(void)
{
  return seconds_shown_to_new_turn;
}
 
/**********************************************************************/
double real_timer_callback(void)
{
  double time_until_next_call = 1.0;
 
  voteinfo_queue_check_removed();
 
  {
    double autoconnect_time = try_to_autoconnect();
    time_until_next_call = MIN(time_until_next_call, autoconnect_time);
  }
 
  if (C_S_RUNNING != client_state()) {
    return time_until_next_call;
  }
 
  time_until_next_call = zoom_update(time_until_next_call);
 
  {
    double blink_time = blink_turn_done_button();
 
    time_until_next_call = MIN(time_until_next_call, blink_time);
  }
 
  if (gui_properties.animations) {
    advance_global_anim_state();
    time_until_next_call = MIN(time_until_next_call, 0.1);
  }
 
  if (get_num_units_in_focus() > 0) {
    double blink_time = blink_active_unit();
 
    time_until_next_call = MIN(time_until_next_call, blink_time);
  }
 
  /* It is possible to have current_turn_timeout() > 0 but !turndone_timer,
   * in the first moments after the timeout is set. */
  if (current_turn_timeout() > 0 && turndone_timer != NULL) {
    double seconds = seconds_to_turndone - timer_read_seconds(turndone_timer);
    int iseconds = ceil(seconds + 0.1); /* Turn should end right on 0. */
 
    if (iseconds < seconds_shown_to_turndone) {
      seconds_shown_to_turndone = iseconds;
      update_timeout_label();
    }
 
    time_until_next_call = MIN(time_until_next_call,
                               seconds - floor(seconds) + 0.001);
  }
  if (waiting_turn_change) {
    double seconds = game.tinfo.last_turn_change_time - timer_read_seconds(between_turns);
    int iseconds = ceil(seconds + 0.1); /* Turn should end right on 0. */
 
    if (iseconds < game.tinfo.last_turn_change_time) {
      seconds_shown_to_new_turn = iseconds;
      update_timeout_label();
    }
  }
 
  {
    static long counter = 0;
 
    counter++;
 
    if (gui_options.heartbeat_enabled && (counter % (20 * 10) == 0)) {
      send_packet_client_heartbeat(&client.conn);
    }
  }
 
  /* Make sure we wait at least 50 ms, otherwise we may not give any other
   * code time to run. */
  return MAX(time_until_next_call, 0.05);
}
 
/**********************************************************************/
bool can_client_control(void)
{
  return (NULL != client.conn.playing
          && !client_is_observer());
}
 
/**********************************************************************/
bool can_client_issue_orders(void)
{
  return (can_client_control()
          && C_S_RUNNING == client_state());
}
 
/**********************************************************************/
bool can_meet_with_player(const struct player *pplayer)
{
  return (can_client_issue_orders()
          /* && NULL != client.conn.playing (above) */
          && could_meet_with_player(client.conn.playing, pplayer));
}
 
/**********************************************************************/
bool can_intel_with_player(const struct player *pplayer)
{
  return (client_is_observer()
          || (NULL != client.conn.playing
              && could_intel_with_player(client_player(), pplayer)));
}
 
/**********************************************************************/
const char *title_for_player(const struct player *pplayer,
                             char *buf, size_t buf_len)
{
  if (client_player() == pplayer || can_intel_with_player(pplayer)) {
    /* Knows the government to construct correct title */
    return ruler_title_for_player(pplayer, buf, buf_len);
  }
 
  return default_title_for_player(pplayer, buf, buf_len);
}
 
/**********************************************************************/
bool can_client_change_view(void)
{
  return ((NULL != client.conn.playing || client_is_observer())
          && (C_S_RUNNING == client_state()
              || C_S_OVER == client_state()));
}
 
/**********************************************************************/
void set_server_busy(bool busy)
{
  if (busy != server_busy) {
    /* server_busy value will change */
    server_busy = busy;
 
    /* This may mean that we have to change from or to wait cursor */
    control_mouse_cursor(NULL);
  }
}
 
/**********************************************************************/
bool is_server_busy(void)
{
  return server_busy;
}
 
/**********************************************************************/
bool client_is_global_observer(void)
{
  return client.conn.playing == NULL && client.conn.observer;
}
 
/**********************************************************************/
int client_player_number(void)
{
  if (client.conn.playing == NULL) {
    return -1;
  }
  return player_number(client.conn.playing);
}
 
/**********************************************************************/
bool client_has_player(void)
{
  return client.conn.playing != NULL;
}
 
/**********************************************************************/
bool client_map_is_known_and_seen(const struct tile *ptile,
                                  const struct player *pplayer,
                                  enum vision_layer vlayer)
{
  return dbv_isset(&pplayer->client.tile_vision[vlayer], tile_index(ptile));
}
 
/**********************************************************************/
static int client_plr_tile_city_id_get(const struct tile *ptile,
                                       const struct player *pplayer)
{
  struct city *pcity = tile_city(ptile);
 
  /* Can't look up what other players think. */
  fc_assert(pplayer == client_player());
 
  return pcity ? pcity->id : IDENTITY_NUMBER_ZERO;
}
 
/**********************************************************************/
static server_setting_id client_ss_by_name(const char *name)
{
  struct option *pset = optset_option_by_name(server_optset, name);
 
  if (pset) {
    return option_number(pset);
  } else {
    log_error("No server setting named %s exists.", name);
    return SERVER_SETTING_NONE;
  }
}
 
/**********************************************************************/
static const char *client_ss_name_get(server_setting_id id)
{
  struct option *pset = optset_option_by_number(server_optset, id);
 
  if (pset) {
    return option_name(pset);
  } else {
    log_error("No server setting with the id %d exists.", id);
    return NULL;
  }
}
 
/**********************************************************************/
static enum sset_type client_ss_type_get(server_setting_id id)
{
  enum option_type opt_type;
  struct option *pset = optset_option_by_number(server_optset, id);
 
  if (!pset) {
    log_error("No server setting with the id %d exists.", id);
    return sset_type_invalid();
  }
 
  opt_type = option_type(pset);
 
  /* The option type isn't client only. */
  fc_assert_ret_val_msg((opt_type != OT_FONT
                         && opt_type != OT_COLOR
                         && opt_type != OT_VIDEO_MODE),
                        sset_type_invalid(),
                        "%s is a client option type but not a server "
                        "setting type",
                        option_type_name(option_type(pset)));
 
  /* The option type is valid. */
  fc_assert_ret_val(sset_type_is_valid((enum sset_type)opt_type),
                    sset_type_invalid());
 
  /* Each server setting type value equals the client option type value with
   * the same meaning. */
  FC_STATIC_ASSERT((enum sset_type)OT_BOOLEAN == SST_BOOL
                   && (enum sset_type)OT_INTEGER == SST_INT
                   && (enum sset_type)OT_STRING == SST_STRING
                   && (enum sset_type)OT_ENUM == SST_ENUM
                   && (enum sset_type)OT_BITWISE == SST_BITWISE
                   && SST_COUNT == (enum sset_type)5,
                   server_setting_type_not_equal_to_client_option_type);
 
  /* Exploit the fact that each server setting type value corresponds to the
   * client option type value with the same meaning. */
  return (enum sset_type)opt_type;
}
 
/**********************************************************************/
static bool client_ss_val_bool_get(server_setting_id id)
{
  struct option *pset = optset_option_by_number(server_optset, id);
 
  if (pset) {
    return option_bool_get(pset);
  } else {
    log_error("No server setting with the id %d exists.", id);
    return FALSE;
  }
}
 
/**********************************************************************/
static int client_ss_val_int_get(server_setting_id id)
{
  struct option *pset = optset_option_by_number(server_optset, id);
 
  if (pset) {
    return option_int_get(pset);
  } else {
    log_error("No server setting with the id %d exists.", id);
    return 0;
  }
}
 
/**********************************************************************/
static unsigned int client_ss_val_bitwise_get(server_setting_id id)
{
  struct option *pset = optset_option_by_number(server_optset, id);
 
  if (pset) {
    return option_bitwise_get(pset);
  } else {
    log_error("No server setting with the id %d exists.", id);
    return FALSE;
  }
}
 
/**********************************************************************/
static void fc_interface_init_client(void)
{
  struct functions *funcs = fc_interface_funcs();
 
  funcs->server_setting_by_name = client_ss_by_name;
  funcs->server_setting_name_get = client_ss_name_get;
  funcs->server_setting_type_get = client_ss_type_get;
  funcs->server_setting_val_bool_get = client_ss_val_bool_get;
  funcs->server_setting_val_int_get = client_ss_val_int_get;
  funcs->server_setting_val_bitwise_get = client_ss_val_bitwise_get;
  funcs->create_extra = NULL;
  funcs->destroy_extra = NULL;
  funcs->destroy_city = NULL;
  funcs->player_tile_vision_get = client_map_is_known_and_seen;
  funcs->player_tile_city_id_get = client_plr_tile_city_id_get;
  funcs->gui_color_free = color_free;
 
  /* Keep this function call at the end. It checks if all required functions
     are defined. */
  libfreeciv_init(TRUE);
}
 
/**********************************************************************/
static enum known_type mapimg_client_tile_known(const struct tile *ptile,
                                                const struct player *pplayer,
                                                bool knowledge)
{
  if (client_is_global_observer()) {
    return TILE_KNOWN_SEEN;
  }
 
  return tile_get_known(ptile, pplayer);
}
 
/**********************************************************************/
static struct terrain *
  mapimg_client_tile_terrain(const struct tile *ptile,
                             const struct player *pplayer, bool knowledge)
{
  return tile_terrain(ptile);
}
 
/**********************************************************************/
static struct player *mapimg_client_tile_owner(const struct tile *ptile,
                                               const struct player *pplayer,
                                               bool knowledge)
{
  return tile_owner(ptile);
}
 
/**********************************************************************/
static struct player *mapimg_client_tile_city(const struct tile *ptile,
                                              const struct player *pplayer,
                                              bool knowledge)
{
  struct city *pcity = tile_city(ptile);
 
  if (!pcity) {
    return NULL;
  }
 
  return city_owner(tile_city(ptile));
}
 
/**********************************************************************/
static struct player *mapimg_client_tile_unit(const struct tile *ptile,
                                              const struct player *pplayer,
                                              bool knowledge)
{
  int unit_count = unit_list_size(ptile->units);
 
  if (unit_count == 0) {
    return NULL;
  }
 
  return unit_owner(unit_list_get(ptile->units, 0));
}
 
/**********************************************************************/
static int mapimg_client_plrcolor_count(void)
{
  return player_count();
}
 
/**********************************************************************/
static struct rgbcolor *mapimg_client_plrcolor_get(int i)
{
  int count = 0;
 
  if (0 > i || i > player_count()) {
    return NULL;
  }
 
  players_iterate(pplayer) {
    if (count == i) {
      return pplayer->rgb;
    }
    count++;
  } players_iterate_end;
 
  return NULL;
}
 
/**********************************************************************/
bool is_client_quitting(void)
{
  return client_quitting;
}
 
/**********************************************************************/
void start_quitting(void)
{
  client_quitting = TRUE;
}
 
/************************************************************************/
static void cache_tilesets(void)
{
  struct fileinfo_list *tileset_choices;
 
  tileset_choices = get_modpacks_list();
 
  fileinfo_list_iterate(tileset_choices, pfile) {
    struct section_file *sf;
 
    sf = secfile_load(pfile->fullname, FALSE);
 
    if (sf != NULL) {
      modpack_cache_tileset(sf);
      secfile_destroy(sf);
    }
  } fileinfo_list_iterate_end;
 
  fileinfo_list_destroy(tileset_choices);
}