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[2] Code cleanup in serverpackethandler (#9349) 

* Code cleanup in serverpackethandler

* do not define p_under unless a node is pointed
* use switch-case and reduce indentation
This commit is contained in:
HybridDog 2020-09-01 08:08:18 +02:00 committed by GitHub
parent d3d218940b
commit f5df70764d
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1 changed files with 181 additions and 200 deletions
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381
src/network/serverpackethandler.cpp
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@ -986,10 +986,6 @@ void Server::handleCommand_Interact(NetworkPacket *pkt)
// Update wielded item
playersao->getPlayer()->setWieldIndex(item_i);
// Get pointed to node (undefined if not POINTEDTYPE_NODE)
v3s16 p_under = pointed.node_undersurface;
v3s16 p_above = pointed.node_abovesurface;
// Get pointed to object (NULL if not POINTEDTYPE_OBJECT)
ServerActiveObject *pointed_object = NULL;
if (pointed.type == POINTEDTHING_OBJECT) {
@ -1002,17 +998,6 @@ void Server::handleCommand_Interact(NetworkPacket *pkt)
}
v3f pointed_pos_under = player_pos;
v3f pointed_pos_above = player_pos;
if (pointed.type == POINTEDTHING_NODE) {
pointed_pos_under = intToFloat(p_under, BS);
pointed_pos_above = intToFloat(p_above, BS);
}
else if (pointed.type == POINTEDTHING_OBJECT) {
pointed_pos_under = pointed_object->getBasePosition();
pointed_pos_above = pointed_pos_under;
}
/*
Make sure the player is allowed to do it
*/
@ -1020,16 +1005,19 @@ void Server::handleCommand_Interact(NetworkPacket *pkt)
actionstream << player->getName() << " attempted to interact with " <<
pointed.dump() << " without 'interact' privilege" << std::endl;
if (pointed.type != POINTEDTHING_NODE)
return;
// Re-send block to revert change on client-side
RemoteClient *client = getClient(peer_id);
// Digging completed -> under
if (action == INTERACT_DIGGING_COMPLETED) {
v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
v3s16 blockpos = getNodeBlockPos(pointed.node_undersurface);
client->SetBlockNotSent(blockpos);
}
// Placement -> above
else if (action == INTERACT_PLACE) {
v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS));
v3s16 blockpos = getNodeBlockPos(pointed.node_abovesurface);
client->SetBlockNotSent(blockpos);
}
return;
@ -1037,7 +1025,6 @@ void Server::handleCommand_Interact(NetworkPacket *pkt)
/*
Check that target is reasonably close
(only when digging or placing things)
*/
static thread_local const bool enable_anticheat =
!g_settings->getBool("disable_anticheat");
@ -1045,12 +1032,19 @@ void Server::handleCommand_Interact(NetworkPacket *pkt)
if ((action == INTERACT_START_DIGGING || action == INTERACT_DIGGING_COMPLETED ||
action == INTERACT_PLACE || action == INTERACT_USE) &&
enable_anticheat && !isSingleplayer()) {
float d = playersao->getEyePosition().getDistanceFrom(pointed_pos_under);
v3f target_pos = player_pos;
if (pointed.type == POINTEDTHING_NODE) {
target_pos = intToFloat(pointed.node_undersurface, BS);
} else if (pointed.type == POINTEDTHING_OBJECT) {
target_pos = pointed_object->getBasePosition();
}
float d = playersao->getEyePosition().getDistanceFrom(target_pos);
if (!checkInteractDistance(player, d, pointed.dump())) {
if (!checkInteractDistance(player, d, pointed.dump())
&& pointed.type == POINTEDTHING_NODE) {
// Re-send block to revert change on client-side
RemoteClient *client = getClient(peer_id);
v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
v3s16 blockpos = getNodeBlockPos(pointed.node_undersurface);
client->SetBlockNotSent(blockpos);
return;
}
@ -1062,20 +1056,20 @@ void Server::handleCommand_Interact(NetworkPacket *pkt)
RollbackScopeActor rollback_scope(m_rollback,
std::string("player:")+player->getName());
/*
0: start digging or punch object
*/
if (action == INTERACT_START_DIGGING) {
switch (action) {
// Start digging or punch object
case INTERACT_START_DIGGING: {
if (pointed.type == POINTEDTHING_NODE) {
MapNode n(CONTENT_IGNORE);
bool pos_ok;
v3s16 p_under = pointed.node_undersurface;
n = m_env->getMap().getNode(p_under, &pos_ok);
if (!pos_ok) {
infostream << "Server: Not punching: Node not found. "
"Adding block to emerge queue." << std::endl;
m_emerge->enqueueBlockEmerge(peer_id, getNodeBlockPos(p_above),
false);
m_emerge->enqueueBlockEmerge(peer_id,
getNodeBlockPos(pointed.node_abovesurface), false);
}
if (n.getContent() != CONTENT_IGNORE)
@ -1083,159 +1077,155 @@ void Server::handleCommand_Interact(NetworkPacket *pkt)
// Cheat prevention
playersao->noCheatDigStart(p_under);
}
else if (pointed.type == POINTEDTHING_OBJECT) {
// Skip if object can't be interacted with anymore
if (pointed_object->isGone())
return;
ItemStack selected_item, hand_item;
ItemStack tool_item = playersao->getWieldedItem(&selected_item, &hand_item);
ToolCapabilities toolcap =
tool_item.getToolCapabilities(m_itemdef);
v3f dir = (pointed_object->getBasePosition() -
(playersao->getBasePosition() + playersao->getEyeOffset())
).normalize();
float time_from_last_punch =
playersao->resetTimeFromLastPunch();
u16 src_original_hp = pointed_object->getHP();
u16 dst_origin_hp = playersao->getHP();
u16 wear = pointed_object->punch(dir, &toolcap, playersao,
time_from_last_punch);
// Callback may have changed item, so get it again
playersao->getWieldedItem(&selected_item);
bool changed = selected_item.addWear(wear, m_itemdef);
if (changed)
playersao->setWieldedItem(selected_item);
// If the object is a player and its HP changed
if (src_original_hp != pointed_object->getHP() &&
pointed_object->getType() == ACTIVEOBJECT_TYPE_PLAYER) {
SendPlayerHPOrDie((PlayerSAO *)pointed_object,
PlayerHPChangeReason(PlayerHPChangeReason::PLAYER_PUNCH, playersao));
}
// If the puncher is a player and its HP changed
if (dst_origin_hp != playersao->getHP())
SendPlayerHPOrDie(playersao,
PlayerHPChangeReason(PlayerHPChangeReason::PLAYER_PUNCH, pointed_object));
return;
}
// Skip if the object can't be interacted with anymore
if (pointed.type != POINTEDTHING_OBJECT || pointed_object->isGone())
return;
ItemStack selected_item, hand_item;
ItemStack tool_item = playersao->getWieldedItem(&selected_item, &hand_item);
ToolCapabilities toolcap =
tool_item.getToolCapabilities(m_itemdef);
v3f dir = (pointed_object->getBasePosition() -
(playersao->getBasePosition() + playersao->getEyeOffset())
).normalize();
float time_from_last_punch =
playersao->resetTimeFromLastPunch();
u16 src_original_hp = pointed_object->getHP();
u16 dst_origin_hp = playersao->getHP();
u16 wear = pointed_object->punch(dir, &toolcap, playersao,
time_from_last_punch);
// Callback may have changed item, so get it again
playersao->getWieldedItem(&selected_item);
bool changed = selected_item.addWear(wear, m_itemdef);
if (changed)
playersao->setWieldedItem(selected_item);
// If the object is a player and its HP changed
if (src_original_hp != pointed_object->getHP() &&
pointed_object->getType() == ACTIVEOBJECT_TYPE_PLAYER) {
SendPlayerHPOrDie((PlayerSAO *)pointed_object,
PlayerHPChangeReason(PlayerHPChangeReason::PLAYER_PUNCH, playersao));
}
// If the puncher is a player and its HP changed
if (dst_origin_hp != playersao->getHP())
SendPlayerHPOrDie(playersao,
PlayerHPChangeReason(PlayerHPChangeReason::PLAYER_PUNCH, pointed_object));
return;
} // action == INTERACT_START_DIGGING
/*
1: stop digging
*/
else if (action == INTERACT_STOP_DIGGING) {
} // action == INTERACT_STOP_DIGGING
case INTERACT_STOP_DIGGING:
// Nothing to do
return;
/*
2: Digging completed
*/
else if (action == INTERACT_DIGGING_COMPLETED) {
case INTERACT_DIGGING_COMPLETED: {
// Only digging of nodes
if (pointed.type == POINTEDTHING_NODE) {
bool pos_ok;
MapNode n = m_env->getMap().getNode(p_under, &pos_ok);
if (!pos_ok) {
infostream << "Server: Not finishing digging: Node not found. "
"Adding block to emerge queue." << std::endl;
m_emerge->enqueueBlockEmerge(peer_id, getNodeBlockPos(p_above),
false);
if (pointed.type != POINTEDTHING_NODE)
return;
bool pos_ok;
v3s16 p_under = pointed.node_undersurface;
MapNode n = m_env->getMap().getNode(p_under, &pos_ok);
if (!pos_ok) {
infostream << "Server: Not finishing digging: Node not found. "
"Adding block to emerge queue." << std::endl;
m_emerge->enqueueBlockEmerge(peer_id,
getNodeBlockPos(pointed.node_abovesurface), false);
}
/* Cheat prevention */
bool is_valid_dig = true;
if (enable_anticheat && !isSingleplayer()) {
v3s16 nocheat_p = playersao->getNoCheatDigPos();
float nocheat_t = playersao->getNoCheatDigTime();
playersao->noCheatDigEnd();
// If player didn't start digging this, ignore dig
if (nocheat_p != p_under) {
infostream << "Server: " << player->getName()
<< " started digging "
<< PP(nocheat_p) << " and completed digging "
<< PP(p_under) << "; not digging." << std::endl;
is_valid_dig = false;
// Call callbacks
m_script->on_cheat(playersao, "finished_unknown_dig");
}
/* Cheat prevention */
bool is_valid_dig = true;
if (enable_anticheat && !isSingleplayer()) {
v3s16 nocheat_p = playersao->getNoCheatDigPos();
float nocheat_t = playersao->getNoCheatDigTime();
playersao->noCheatDigEnd();
// If player didn't start digging this, ignore dig
if (nocheat_p != p_under) {
infostream << "Server: " << player->getName()
<< " started digging "
<< PP(nocheat_p) << " and completed digging "
<< PP(p_under) << "; not digging." << std::endl;
is_valid_dig = false;
// Call callbacks
m_script->on_cheat(playersao, "finished_unknown_dig");
}
// Get player's wielded item
// See also: Game::handleDigging
ItemStack selected_item, hand_item;
playersao->getPlayer()->getWieldedItem(&selected_item, &hand_item);
// Get player's wielded item
// See also: Game::handleDigging
ItemStack selected_item, hand_item;
playersao->getPlayer()->getWieldedItem(&selected_item, &hand_item);
// Get diggability and expected digging time
DigParams params = getDigParams(m_nodedef->get(n).groups,
&selected_item.getToolCapabilities(m_itemdef));
// If can't dig, try hand
if (!params.diggable) {
params = getDigParams(m_nodedef->get(n).groups,
&hand_item.getToolCapabilities(m_itemdef));
}
// If can't dig, ignore dig
if (!params.diggable) {
infostream << "Server: " << player->getName()
<< " completed digging " << PP(p_under)
<< ", which is not diggable with tool; not digging."
<< std::endl;
is_valid_dig = false;
// Call callbacks
m_script->on_cheat(playersao, "dug_unbreakable");
}
// Check digging time
// If already invalidated, we don't have to
if (!is_valid_dig) {
// Well not our problem then
}
// Clean and long dig
else if (params.time > 2.0 && nocheat_t * 1.2 > params.time) {
// All is good, but grab time from pool; don't care if
// it's actually available
playersao->getDigPool().grab(params.time);
}
// Short or laggy dig
// Try getting the time from pool
else if (playersao->getDigPool().grab(params.time)) {
// All is good
}
// Dig not possible
else {
infostream << "Server: " << player->getName()
<< " completed digging " << PP(p_under)
<< "too fast; not digging." << std::endl;
is_valid_dig = false;
// Call callbacks
m_script->on_cheat(playersao, "dug_too_fast");
}
// Get diggability and expected digging time
DigParams params = getDigParams(m_nodedef->get(n).groups,
&selected_item.getToolCapabilities(m_itemdef));
// If can't dig, try hand
if (!params.diggable) {
params = getDigParams(m_nodedef->get(n).groups,
&hand_item.getToolCapabilities(m_itemdef));
}
/* Actually dig node */
if (is_valid_dig && n.getContent() != CONTENT_IGNORE)
m_script->node_on_dig(p_under, n, playersao);
v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
RemoteClient *client = getClient(peer_id);
// Send unusual result (that is, node not being removed)
if (m_env->getMap().getNode(p_under).getContent() != CONTENT_AIR) {
// Re-send block to revert change on client-side
client->SetBlockNotSent(blockpos);
// If can't dig, ignore dig
if (!params.diggable) {
infostream << "Server: " << player->getName()
<< " completed digging " << PP(p_under)
<< ", which is not diggable with tool; not digging."
<< std::endl;
is_valid_dig = false;
// Call callbacks
m_script->on_cheat(playersao, "dug_unbreakable");
}
// Check digging time
// If already invalidated, we don't have to
if (!is_valid_dig) {
// Well not our problem then
}
// Clean and long dig
else if (params.time > 2.0 && nocheat_t * 1.2 > params.time) {
// All is good, but grab time from pool; don't care if
// it's actually available
playersao->getDigPool().grab(params.time);
}
// Short or laggy dig
// Try getting the time from pool
else if (playersao->getDigPool().grab(params.time)) {
// All is good
}
// Dig not possible
else {
client->ResendBlockIfOnWire(blockpos);
infostream << "Server: " << player->getName()
<< " completed digging " << PP(p_under)
<< "too fast; not digging." << std::endl;
is_valid_dig = false;
// Call callbacks
m_script->on_cheat(playersao, "dug_too_fast");
}
}
/* Actually dig node */
if (is_valid_dig && n.getContent() != CONTENT_IGNORE)
m_script->node_on_dig(p_under, n, playersao);
v3s16 blockpos = getNodeBlockPos(p_under);
RemoteClient *client = getClient(peer_id);
// Send unusual result (that is, node not being removed)
if (m_env->getMap().getNode(p_under).getContent() != CONTENT_AIR)
// Re-send block to revert change on client-side
client->SetBlockNotSent(blockpos);
else
client->ResendBlockIfOnWire(blockpos);
return;
} // action == INTERACT_DIGGING_COMPLETED
/*
3: place block or right-click object
*/
else if (action == INTERACT_PLACE) {
// Place block or right-click object
case INTERACT_PLACE: {
ItemStack selected_item;
playersao->getWieldedItem(&selected_item, nullptr);
@ -1264,59 +1254,54 @@ void Server::handleCommand_Interact(NetworkPacket *pkt)
}
pointed_object->rightClick(playersao);
} else if (m_script->item_OnPlace(
selected_item, playersao, pointed)) {
} else if (m_script->item_OnPlace(selected_item, playersao, pointed)) {
// Placement was handled in lua
// Apply returned ItemStack
if (playersao->setWieldedItem(selected_item)) {
if (playersao->setWieldedItem(selected_item))
SendInventory(playersao, true);
}
}
if (pointed.type != POINTEDTHING_NODE)
return;
// If item has node placement prediction, always send the
// blocks to make sure the client knows what exactly happened
RemoteClient *client = getClient(peer_id);
v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS));
v3s16 blockpos2 = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
if (!selected_item.getDefinition(m_itemdef).node_placement_prediction.empty()) {
v3s16 blockpos = getNodeBlockPos(pointed.node_abovesurface);
v3s16 blockpos2 = getNodeBlockPos(pointed.node_undersurface);
if (!selected_item.getDefinition(m_itemdef
).node_placement_prediction.empty()) {
client->SetBlockNotSent(blockpos);
if (blockpos2 != blockpos) {
if (blockpos2 != blockpos)
client->SetBlockNotSent(blockpos2);
}
}
else {
} else {
client->ResendBlockIfOnWire(blockpos);
if (blockpos2 != blockpos) {
if (blockpos2 != blockpos)
client->ResendBlockIfOnWire(blockpos2);
}
}
return;
} // action == INTERACT_PLACE
/*
4: use
*/
else if (action == INTERACT_USE) {
case INTERACT_USE: {
ItemStack selected_item;
playersao->getWieldedItem(&selected_item, nullptr);
actionstream << player->getName() << " uses " << selected_item.name
<< ", pointing at " << pointed.dump() << std::endl;
if (m_script->item_OnUse(
selected_item, playersao, pointed)) {
if (m_script->item_OnUse(selected_item, playersao, pointed)) {
// Apply returned ItemStack
if (playersao->setWieldedItem(selected_item)) {
if (playersao->setWieldedItem(selected_item))
SendInventory(playersao, true);
}
}
} // action == INTERACT_USE
return;
}
/*
5: rightclick air
*/
else if (action == INTERACT_ACTIVATE) {
// Rightclick air
case INTERACT_ACTIVATE: {
ItemStack selected_item;
playersao->getWieldedItem(&selected_item, nullptr);
@ -1325,21 +1310,17 @@ void Server::handleCommand_Interact(NetworkPacket *pkt)
pointed.type = POINTEDTHING_NOTHING; // can only ever be NOTHING
if (m_script->item_OnSecondaryUse(
selected_item, playersao, pointed)) {
if (playersao->setWieldedItem(selected_item)) {
if (m_script->item_OnSecondaryUse(selected_item, playersao, pointed)) {
if (playersao->setWieldedItem(selected_item))
SendInventory(playersao, true);
}
}
} // action == INTERACT_ACTIVATE
return;
}
default:
warningstream << "Server: Invalid action " << action << std::endl;
/*
Catch invalid actions
*/
else {
warningstream << "Server: Invalid action "
<< action << std::endl;
}
}