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Fix: Only possible to build station next to competitors by using CTRL+click 

Fix by checking only for stations owned by the current company when
inspecting if there are multiple adjoining stations to the one being built.

When building next to 2 or more owned stations we don't know which
station should be extended. For other companies' stations that's not a
problem since our station won't merge with theirs anyway.

Calling to BuildStationPart should never have another company's station
as a parameter to attach to unless the client is malicious, so just returning
a generic error in that case.
This commit is contained in:
Joost Hopmans 2018-06-20 12:17:05 +02:00 committed by frosch
parent 18ca3e8660
commit 5029cd6f28
1 changed files with 9 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
src/station_cmd.cpp
View File

@ -89,25 +89,25 @@ bool IsHangar(TileIndex t)
}
/**
* Look for a station around the given tile area.
* Look for a station owned by the given company around the given tile area.
* @param ta the area to search over
* @param closest_station the closest station found so far
* @param closest_station the closest owned station found so far
* @param company the company whose stations to look for
* @param st to 'return' the found station
* @return Succeeded command (if zero or one station found) or failed command (for two or more stations found).
*/
template <class T>
CommandCost GetStationAround(TileArea ta, StationID closest_station, T **st)
CommandCost GetStationAround(TileArea ta, StationID closest_station, CompanyID company, T **st)
{
ta.tile -= TileDiffXY(1, 1);
ta.w += 2;
ta.h += 2;
/* check around to see if there's any stations there */
/* check around to see if there are any stations there owned by the company */
TILE_AREA_LOOP(tile_cur, ta) {
if (IsTileType(tile_cur, MP_STATION)) {
StationID t = GetStationIndex(tile_cur);
if (!T::IsValidID(t)) continue;
if (!T::IsValidID(t) || Station::Get(t)->owner != company) continue;
if (closest_station == INVALID_STATION) {
closest_station = t;
} else if (closest_station != t) {
@ -676,7 +676,7 @@ static CommandCost BuildStationPart(Station **st, DoCommandFlag flags, bool reus
if (*st != NULL) {
if ((*st)->owner != _current_company) {
return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
return_cmd_error(CMD_ERROR);
}
CommandCost ret = (*st)->rect.BeforeAddRect(area.tile, area.w, area.h, StationRect::ADD_TEST);
@ -1105,8 +1105,8 @@ CommandCost FindJoiningBaseStation(StationID existing_station, StationID station
}
if (check_surrounding) {
/* Make sure there are no similar stations around us. */
CommandCost ret = GetStationAround(ta, existing_station, st);
/* Make sure there is no more than one other station around us that is owned by us. */
CommandCost ret = GetStationAround(ta, existing_station, _current_company, st);
if (ret.Failed()) return ret;
}