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Script API: Check that SAOs are still usable before attempting to use them

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This commit is contained in:
sfan5 2020-02-11 13:23:03 +01:00
parent b14aa1c847
commit 91eef646a5
3 changed files with 8 additions and 10 deletions
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4
src/content_sao.cpp
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@ -864,7 +864,7 @@ PlayerSAO::PlayerSAO(ServerEnvironment *env_, RemotePlayer *player_, session_t p
m_peer_id(peer_id_), m_peer_id(peer_id_),
m_is_singleplayer(is_singleplayer) m_is_singleplayer(is_singleplayer)
{ {
assert(m_peer_id != 0); // pre-condition SANITY_CHECK(m_peer_id != PEER_ID_INEXISTENT);
m_prop.hp_max = PLAYER_MAX_HP_DEFAULT; m_prop.hp_max = PLAYER_MAX_HP_DEFAULT;
m_prop.breath_max = PLAYER_MAX_BREATH_DEFAULT; m_prop.breath_max = PLAYER_MAX_BREATH_DEFAULT;
@ -1393,7 +1393,7 @@ bool PlayerSAO::setWieldedItem(const ItemStack &item)
void PlayerSAO::disconnected() void PlayerSAO::disconnected()
{ {
m_peer_id = 0; m_peer_id = PEER_ID_INEXISTENT;
m_pending_removal = true; m_pending_removal = true;
} }

4
src/script/lua_api/l_object.cpp
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@ -60,6 +60,8 @@ LuaEntitySAO* ObjectRef::getluaobject(ObjectRef *ref)
return NULL; return NULL;
if (obj->getType() != ACTIVEOBJECT_TYPE_LUAENTITY) if (obj->getType() != ACTIVEOBJECT_TYPE_LUAENTITY)
return NULL; return NULL;
if (obj->isGone())
return NULL;
return (LuaEntitySAO*)obj; return (LuaEntitySAO*)obj;
} }
@ -70,6 +72,8 @@ PlayerSAO* ObjectRef::getplayersao(ObjectRef *ref)
return NULL; return NULL;
if (obj->getType() != ACTIVEOBJECT_TYPE_PLAYER) if (obj->getType() != ACTIVEOBJECT_TYPE_PLAYER)
return NULL; return NULL;
if (obj->isGone())
return NULL;
return (PlayerSAO*)obj; return (PlayerSAO*)obj;
} }

10
src/server.cpp
View File

@ -1768,10 +1768,7 @@ void Server::SendTimeOfDay(session_t peer_id, u16 time, f32 time_speed)
void Server::SendPlayerHP(session_t peer_id) void Server::SendPlayerHP(session_t peer_id)
{ {
PlayerSAO *playersao = getPlayerSAO(peer_id); PlayerSAO *playersao = getPlayerSAO(peer_id);
// In some rare case if the player is disconnected assert(playersao);
// while Lua call l_punch, for example, this can be NULL
if (!playersao)
return;
SendHP(peer_id, playersao->getHP()); SendHP(peer_id, playersao->getHP());
m_script->player_event(playersao,"health_changed"); m_script->player_event(playersao,"health_changed");
@ -2701,10 +2698,7 @@ void Server::sendDetachedInventories(session_t peer_id, bool incremental)
void Server::DiePlayer(session_t peer_id, const PlayerHPChangeReason &reason) void Server::DiePlayer(session_t peer_id, const PlayerHPChangeReason &reason)
{ {
PlayerSAO *playersao = getPlayerSAO(peer_id); PlayerSAO *playersao = getPlayerSAO(peer_id);
// In some rare cases this can be NULL -- if the player is disconnected assert(playersao);
// when a Lua function modifies l_punch, for example
if (!playersao)
return;
infostream << "Server::DiePlayer(): Player " infostream << "Server::DiePlayer(): Player "
<< playersao->getPlayer()->getName() << playersao->getPlayer()->getName()