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Lars 2023-03-03 17:51:45 -08:00
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/*
Minetest
Copyright (C) 2010-2014 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <sstream>
#include "clientiface.h"
#include "network/connection.h"
#include "network/serveropcodes.h"
#include "remoteplayer.h"
#include "settings.h"
#include "mapblock.h"
#include "serverenvironment.h"
#include "map.h"
#include "emerge.h"
#include "server/luaentity_sao.h"
#include "server/player_sao.h"
#include "log.h"
#include "util/srp.h"
#include "face_position_cache.h"
const char *ClientInterface::statenames[] = {
"Invalid",
"Disconnecting",
"Denied",
"Created",
"AwaitingInit2",
"HelloSent",
"InitDone",
"DefinitionsSent",
"Active",
"SudoMode",
};
std::string ClientInterface::state2Name(ClientState state)
{
return statenames[state];
}
RemoteClient::RemoteClient() :
m_max_simul_sends(g_settings->getU16("max_simultaneous_block_sends_per_client")),
m_min_time_from_building(
g_settings->getFloat("full_block_send_enable_min_time_from_building")),
m_max_send_distance(g_settings->getS16("max_block_send_distance")),
m_block_optimize_distance(g_settings->getS16("block_send_optimize_distance")),
m_max_gen_distance(g_settings->getS16("max_block_generate_distance")),
m_occ_cull(g_settings->getBool("server_side_occlusion_culling"))
{
}
void RemoteClient::ResendBlockIfOnWire(v3s16 p)
{
// if this block is on wire, mark it for sending again as soon as possible
if (m_blocks_sending.find(p) != m_blocks_sending.end()) {
SetBlockNotSent(p);
}
}
LuaEntitySAO *getAttachedObject(PlayerSAO *sao, ServerEnvironment *env)
{
if (!sao->isAttached())
return nullptr;
int id;
std::string bone;
v3f dummy;
bool force_visible;
sao->getAttachment(&id, &bone, &dummy, &dummy, &force_visible);
ServerActiveObject *ao = env->getActiveObject(id);
while (id && ao) {
ao->getAttachment(&id, &bone, &dummy, &dummy, &force_visible);
if (id)
ao = env->getActiveObject(id);
}
return dynamic_cast<LuaEntitySAO *>(ao);
}
void RemoteClient::GetNextBlocks (
ServerEnvironment *env,
EmergeManager * emerge,
float dtime,
std::vector<PrioritySortedBlockTransfer> &dest)
{
// Increment timers
m_nothing_to_send_pause_timer -= dtime;
m_map_send_completion_timer += dtime;
if (m_nothing_to_send_pause_timer >= 0)
return;
RemotePlayer *player = env->getPlayer(peer_id);
// This can happen sometimes; clients and players are not in perfect sync.
if (!player)
return;
PlayerSAO *sao = player->getPlayerSAO();
if (!sao)
return;
// Won't send anything if already sending
if (m_blocks_sending.size() >= m_max_simul_sends) {
//infostream<<"Not sending any blocks, Queue full."<<std::endl;
return;
}
v3f playerpos = sao->getBasePosition();
// if the player is attached, get the velocity from the attached object
LuaEntitySAO *lsao = getAttachedObject(sao, env);
const v3f &playerspeed = lsao? lsao->getVelocity() : player->getSpeed();
v3f playerspeeddir(0,0,0);
if (playerspeed.getLength() > 1.0f * BS)
playerspeeddir = playerspeed / playerspeed.getLength();
// Predict to next block
v3f playerpos_predicted = playerpos + playerspeeddir * (MAP_BLOCKSIZE * BS);
v3s16 center_nodepos = floatToInt(playerpos_predicted, BS);
v3s16 center = getNodeBlockPos(center_nodepos);
// Camera position and direction
v3f camera_pos = sao->getEyePosition();
v3f camera_dir = v3f(0,0,1);
camera_dir.rotateYZBy(sao->getLookPitch());
camera_dir.rotateXZBy(sao->getRotation().Y);
u16 max_simul_sends_usually = m_max_simul_sends;
/*
Check the time from last addNode/removeNode.
Decrease send rate if player is building stuff.
*/
m_time_from_building += dtime;
if (m_time_from_building < m_min_time_from_building) {
max_simul_sends_usually
= LIMITED_MAX_SIMULTANEOUS_BLOCK_SENDS;
}
/*
Number of blocks sending + number of blocks selected for sending
*/
u32 num_blocks_selected = m_blocks_sending.size();
/*
next time d will be continued from the d from which the nearest
unsent block was found this time.
This is because not necessarily any of the blocks found this
time are actually sent.
*/
s32 new_nearest_unsent_d = -1;
// Get view range and camera fov (radians) from the client
s16 wanted_range = sao->getWantedRange() + 1;
float camera_fov = sao->getFov();
/*
Get the starting value of the block finder radius.
*/
if (m_last_center != center) {
m_nearest_unsent_d = 0;
m_last_center = center;
}
// reset the unsent distance if the view angle has changed more that 10% of the fov
// (this matches isBlockInSight which allows for an extra 10%)
if (camera_dir.dotProduct(m_last_camera_dir) < std::cos(camera_fov * 0.1f)) {
m_nearest_unsent_d = 0;
m_last_camera_dir = camera_dir;
}
if (m_nearest_unsent_d > 0) {
// make sure any blocks modified since the last time we sent blocks are resent
for (const v3s16 &p : m_blocks_modified) {
m_nearest_unsent_d = std::min(m_nearest_unsent_d, center.getDistanceFrom(p));
}
}
m_blocks_modified.clear();
s16 d_start = m_nearest_unsent_d;
// Distrust client-sent FOV and get server-set player object property
// zoom FOV (degrees) as a check to avoid hacked clients using FOV to load
// distant world.
// (zoom is disabled by value 0)
float prop_zoom_fov = sao->getZoomFOV() < 0.001f ?
0.0f :
std::max(camera_fov, sao->getZoomFOV() * core::DEGTORAD);
const s16 full_d_max = std::min(adjustDist(m_max_send_distance, prop_zoom_fov),
wanted_range);
const s16 d_opt = std::min(adjustDist(m_block_optimize_distance, prop_zoom_fov),
wanted_range);
const s16 d_blocks_in_sight = full_d_max * BS * MAP_BLOCKSIZE;
s16 d_max_gen = std::min(adjustDist(m_max_gen_distance, prop_zoom_fov),
wanted_range);
s16 d_max = full_d_max;
// Don't loop very much at a time
s16 max_d_increment_at_time = 2;
if (d_max > d_start + max_d_increment_at_time)
d_max = d_start + max_d_increment_at_time;
// cos(angle between velocity and camera) * |velocity|
// Limit to 0.0f in case player moves backwards.
f32 dot = rangelim(camera_dir.dotProduct(playerspeed), 0.0f, 300.0f);
// Reduce the field of view when a player moves and looks forward.
// limit max fov effect to 50%, 60% at 20n/s fly speed
camera_fov = camera_fov / (1 + dot / 300.0f);
s32 nearest_emerged_d = -1;
s32 nearest_emergefull_d = -1;
s32 nearest_sent_d = -1;
//bool queue_is_full = false;
const v3s16 cam_pos_nodes = floatToInt(camera_pos, BS);
s16 d;
for (d = d_start; d <= d_max; d++) {
/*
Get the border/face dot coordinates of a "d-radiused"
box
*/
std::vector<v3s16> list = FacePositionCache::getFacePositions(d);
std::vector<v3s16>::iterator li;
for (li = list.begin(); li != list.end(); ++li) {
v3s16 p = *li + center;
/*
Send throttling
- Don't allow too many simultaneous transfers
- EXCEPT when the blocks are very close
Also, don't send blocks that are already flying.
*/
// Start with the usual maximum
u16 max_simul_dynamic = max_simul_sends_usually;
// If block is very close, allow full maximum
if (d <= BLOCK_SEND_DISABLE_LIMITS_MAX_D)
max_simul_dynamic = m_max_simul_sends;
// Don't select too many blocks for sending
if (num_blocks_selected >= max_simul_dynamic) {
//queue_is_full = true;
goto queue_full_break;
}
// Don't send blocks that are currently being transferred
if (m_blocks_sending.find(p) != m_blocks_sending.end())
continue;
/*
Do not go over max mapgen limit
*/
if (blockpos_over_max_limit(p))
continue;
// If this is true, inexistent block will be made from scratch
bool generate = d <= d_max_gen;
/*
Don't generate or send if not in sight
FIXME This only works if the client uses a small enough
FOV setting. The default of 72 degrees is fine.
Also retrieve a smaller view cone in the direction of the player's
movement.
(0.1 is about 4 degrees)
*/
f32 dist;
if (!(isBlockInSight(p, camera_pos, camera_dir, camera_fov,
d_blocks_in_sight, &dist) ||
(playerspeed.getLength() > 1.0f * BS &&
isBlockInSight(p, camera_pos, playerspeeddir, 0.1f,
d_blocks_in_sight)))) {
continue;
}
/*
Check if map has this block
*/
MapBlock *block = env->getMap().getBlockNoCreateNoEx(p);
if (block) {
// First: Reset usage timer, this block will be of use in the future.
block->resetUsageTimer();
}
/*
Don't send already sent blocks
*/
if (m_blocks_sent.find(p) != m_blocks_sent.end())
continue;
bool block_not_found = false;
if (block) {
// Check whether the block exists (with data)
if (!block->isGenerated())
block_not_found = true;
/*
If block is not close, don't send it unless it is near
ground level.
Block is near ground level if night-time mesh
differs from day-time mesh.
*/
if (d >= d_opt) {
if (!block->getIsUnderground() && !block->getDayNightDiff())
continue;
}
if (m_occ_cull && !block_not_found &&
env->getMap().isBlockOccluded(block, cam_pos_nodes)) {
continue;
}
}
/*
If block has been marked to not exist on disk (dummy) or is
not generated and generating new ones is not wanted, skip block.
*/
if (!generate && block_not_found) {
// get next one.
continue;
}
/*
Add inexistent block to emerge queue.
*/
if (block == NULL || block_not_found) {
if (emerge->enqueueBlockEmerge(peer_id, p, generate)) {
if (nearest_emerged_d == -1)
nearest_emerged_d = d;
} else {
if (nearest_emergefull_d == -1)
nearest_emergefull_d = d;
goto queue_full_break;
}
// get next one.
continue;
}
if (nearest_sent_d == -1)
nearest_sent_d = d;
/*
Add block to send queue
*/
PrioritySortedBlockTransfer q((float)dist, p, peer_id);
dest.push_back(q);
num_blocks_selected += 1;
}
}
queue_full_break:
// If nothing was found for sending and nothing was queued for
// emerging, continue next time browsing from here
if (nearest_emerged_d != -1) {
new_nearest_unsent_d = nearest_emerged_d;
} else if (nearest_emergefull_d != -1) {
new_nearest_unsent_d = nearest_emergefull_d;
} else {
if (d > full_d_max) {
new_nearest_unsent_d = 0;
m_nothing_to_send_pause_timer = 2.0f;
infostream << "Server: map update for player " << m_name << " RemoteClient " << peer_id << ", time: " << m_map_send_completion_timer << "s" << std::endl;
m_map_send_completion_timer = 0.0f;
} else {
if (nearest_sent_d != -1)
new_nearest_unsent_d = nearest_sent_d;
else
new_nearest_unsent_d = d;
}
}
if (new_nearest_unsent_d != -1)
m_nearest_unsent_d = new_nearest_unsent_d;
}
void RemoteClient::GotBlock(v3s16 p)
{
if (m_blocks_sending.find(p) != m_blocks_sending.end()) {
m_blocks_sending.erase(p);
// only add to sent blocks if it actually was sending
// (it might have been modified since)
m_blocks_sent.insert(p);
} else {
m_excess_gotblocks++;
}
}
void RemoteClient::SentBlock(v3s16 p)
{
if (m_blocks_sending.find(p) == m_blocks_sending.end())
m_blocks_sending[p] = 0.0f;
else
infostream<<"RemoteClient::SentBlock(): Sent block"
" already in m_blocks_sending"<<std::endl;
}
void RemoteClient::SetBlockNotSent(v3s16 p)
{
m_nothing_to_send_pause_timer = 0;
// remove the block from sending and sent sets,
// and mark as modified if found
if (m_blocks_sending.erase(p) + m_blocks_sent.erase(p) > 0)
m_blocks_modified.insert(p);
}
void RemoteClient::SetBlocksNotSent(std::map<v3s16, MapBlock*> &blocks)
{
m_nothing_to_send_pause_timer = 0;
for (auto &block : blocks) {
v3s16 p = block.first;
// remove the block from sending and sent sets,
// and mark as modified if found
if (m_blocks_sending.erase(p) + m_blocks_sent.erase(p) > 0)
m_blocks_modified.insert(p);
}
}
void RemoteClient::notifyEvent(ClientStateEvent event)
{
std::ostringstream myerror;
switch (m_state)
{
case CS_Invalid:
//intentionally do nothing
break;
case CS_Created:
switch (event) {
case CSE_Hello:
m_state = CS_HelloSent;
break;
case CSE_Disconnect:
m_state = CS_Disconnecting;
break;
case CSE_SetDenied:
m_state = CS_Denied;
break;
/* GotInit2 SetDefinitionsSent SetMediaSent */
default:
myerror << "Created: Invalid client state transition! " << event;
throw ClientStateError(myerror.str());
}
break;
case CS_Denied:
/* don't do anything if in denied state */
break;
case CS_HelloSent:
switch(event)
{
case CSE_AuthAccept:
m_state = CS_AwaitingInit2;
resetChosenMech();
break;
case CSE_Disconnect:
m_state = CS_Disconnecting;
break;
case CSE_SetDenied:
m_state = CS_Denied;
resetChosenMech();
break;
default:
myerror << "HelloSent: Invalid client state transition! " << event;
throw ClientStateError(myerror.str());
}
break;
case CS_AwaitingInit2:
switch(event)
{
case CSE_GotInit2:
confirmSerializationVersion();
m_state = CS_InitDone;
break;
case CSE_Disconnect:
m_state = CS_Disconnecting;
break;
case CSE_SetDenied:
m_state = CS_Denied;
break;
/* Init SetDefinitionsSent SetMediaSent */
default:
myerror << "InitSent: Invalid client state transition! " << event;
throw ClientStateError(myerror.str());
}
break;
case CS_InitDone:
switch(event)
{
case CSE_SetDefinitionsSent:
m_state = CS_DefinitionsSent;
break;
case CSE_Disconnect:
m_state = CS_Disconnecting;
break;
case CSE_SetDenied:
m_state = CS_Denied;
break;
/* Init GotInit2 SetMediaSent */
default:
myerror << "InitDone: Invalid client state transition! " << event;
throw ClientStateError(myerror.str());
}
break;
case CS_DefinitionsSent:
switch(event)
{
case CSE_SetClientReady:
m_state = CS_Active;
break;
case CSE_Disconnect:
m_state = CS_Disconnecting;
break;
case CSE_SetDenied:
m_state = CS_Denied;
break;
/* Init GotInit2 SetDefinitionsSent */
default:
myerror << "DefinitionsSent: Invalid client state transition! " << event;
throw ClientStateError(myerror.str());
}
break;
case CS_Active:
switch(event)
{
case CSE_SetDenied:
m_state = CS_Denied;
break;
case CSE_Disconnect:
m_state = CS_Disconnecting;
break;
case CSE_SudoSuccess:
m_state = CS_SudoMode;
resetChosenMech();
break;
/* Init GotInit2 SetDefinitionsSent SetMediaSent SetDenied */
default:
myerror << "Active: Invalid client state transition! " << event;
throw ClientStateError(myerror.str());
break;
}
break;
case CS_SudoMode:
switch(event)
{
case CSE_SetDenied:
m_state = CS_Denied;
break;
case CSE_Disconnect:
m_state = CS_Disconnecting;
break;
case CSE_SudoLeave:
m_state = CS_Active;
break;
default:
myerror << "Active: Invalid client state transition! " << event;
throw ClientStateError(myerror.str());
break;
}
break;
case CS_Disconnecting:
/* we are already disconnecting */
break;
}
}
void RemoteClient::resetChosenMech()
{
if (auth_data) {
srp_verifier_delete((SRPVerifier *) auth_data);
auth_data = nullptr;
}
chosen_mech = AUTH_MECHANISM_NONE;
}
u64 RemoteClient::uptime() const
{
return porting::getTimeS() - m_connection_time;
}
ClientInterface::ClientInterface(const std::shared_ptr<con::Connection> & con)
:
m_con(con),
m_env(NULL),
m_print_info_timer(0.0f)
{
}
ClientInterface::~ClientInterface()
{
/*
Delete clients
*/
{
RecursiveMutexAutoLock clientslock(m_clients_mutex);
for (auto &client_it : m_clients) {
// Delete client
delete client_it.second;
}
}
}
std::vector<session_t> ClientInterface::getClientIDs(ClientState min_state)
{
std::vector<session_t> reply;
RecursiveMutexAutoLock clientslock(m_clients_mutex);
for (const auto &m_client : m_clients) {
if (m_client.second->getState() >= min_state)
reply.push_back(m_client.second->peer_id);
}
return reply;
}
void ClientInterface::markBlockposAsNotSent(const v3s16 &pos)
{
RecursiveMutexAutoLock clientslock(m_clients_mutex);
for (const auto &client : m_clients) {
if (client.second->getState() >= CS_Active)
client.second->SetBlockNotSent(pos);
}
}
/**
* Verify if user limit was reached.
* User limit count all clients from HelloSent state (MT protocol user) to Active state
* @return true if user limit was reached
*/
bool ClientInterface::isUserLimitReached()
{
return getClientIDs(CS_HelloSent).size() >= g_settings->getU16("max_users");
}
void ClientInterface::step(float dtime)
{
m_print_info_timer += dtime;
if (m_print_info_timer >= 30.0f) {
m_print_info_timer = 0.0f;
UpdatePlayerList();
}
}
void ClientInterface::UpdatePlayerList()
{
if (m_env) {
std::vector<session_t> clients = getClientIDs();
m_clients_names.clear();
if (!clients.empty())
infostream<<"Players:"<<std::endl;
for (session_t i : clients) {
RemotePlayer *player = m_env->getPlayer(i);
if (player == NULL)
continue;
infostream << "* " << player->getName() << "\t";
{
RecursiveMutexAutoLock clientslock(m_clients_mutex);
RemoteClient* client = lockedGetClientNoEx(i);
if (client)
client->PrintInfo(infostream);
}
m_clients_names.emplace_back(player->getName());
}
}
}
void ClientInterface::send(session_t peer_id, u8 channelnum,
NetworkPacket *pkt, bool reliable)
{
m_con->Send(peer_id, channelnum, pkt, reliable);
}
void ClientInterface::sendToAll(NetworkPacket *pkt)
{
RecursiveMutexAutoLock clientslock(m_clients_mutex);
for (auto &client_it : m_clients) {
RemoteClient *client = client_it.second;
if (client->net_proto_version != 0) {
m_con->Send(client->peer_id,
clientCommandFactoryTable[pkt->getCommand()].channel, pkt,
clientCommandFactoryTable[pkt->getCommand()].reliable);
}
}
}
RemoteClient* ClientInterface::getClientNoEx(session_t peer_id, ClientState state_min)
{
RecursiveMutexAutoLock clientslock(m_clients_mutex);
RemoteClientMap::const_iterator n = m_clients.find(peer_id);
// The client may not exist; clients are immediately removed if their
// access is denied, and this event occurs later then.
if (n == m_clients.end())
return NULL;
if (n->second->getState() >= state_min)
return n->second;
return NULL;
}
RemoteClient* ClientInterface::lockedGetClientNoEx(session_t peer_id, ClientState state_min)
{
RemoteClientMap::const_iterator n = m_clients.find(peer_id);
// The client may not exist; clients are immediately removed if their
// access is denied, and this event occurs later then.
if (n == m_clients.end())
return NULL;
if (n->second->getState() >= state_min)
return n->second;
return NULL;
}
ClientState ClientInterface::getClientState(session_t peer_id)
{
RecursiveMutexAutoLock clientslock(m_clients_mutex);
RemoteClientMap::const_iterator n = m_clients.find(peer_id);
// The client may not exist; clients are immediately removed if their
// access is denied, and this event occurs later then.
if (n == m_clients.end())
return CS_Invalid;
return n->second->getState();
}
void ClientInterface::setPlayerName(session_t peer_id, const std::string &name)
{
RecursiveMutexAutoLock clientslock(m_clients_mutex);
RemoteClientMap::iterator n = m_clients.find(peer_id);
// The client may not exist; clients are immediately removed if their
// access is denied, and this event occurs later then.
if (n != m_clients.end())
n->second->setName(name);
}
void ClientInterface::DeleteClient(session_t peer_id)
{
RecursiveMutexAutoLock conlock(m_clients_mutex);
// Error check
RemoteClientMap::iterator n = m_clients.find(peer_id);
// The client may not exist; clients are immediately removed if their
// access is denied, and this event occurs later then.
if (n == m_clients.end())
return;
/*
Mark objects to be not known by the client
*/
//TODO this should be done by client destructor!!!
RemoteClient *client = n->second;
// Handle objects
for (u16 id : client->m_known_objects) {
// Get object
ServerActiveObject* obj = m_env->getActiveObject(id);
if(obj && obj->m_known_by_count > 0)
obj->m_known_by_count--;
}
// Delete client
delete m_clients[peer_id];
m_clients.erase(peer_id);
}
void ClientInterface::CreateClient(session_t peer_id)
{
RecursiveMutexAutoLock conlock(m_clients_mutex);
// Error check
RemoteClientMap::iterator n = m_clients.find(peer_id);
// The client shouldn't already exist
if (n != m_clients.end()) return;
// Create client
RemoteClient *client = new RemoteClient();
client->peer_id = peer_id;
m_clients[client->peer_id] = client;
}
void ClientInterface::event(session_t peer_id, ClientStateEvent event)
{
{
RecursiveMutexAutoLock clientlock(m_clients_mutex);
// Error check
RemoteClientMap::iterator n = m_clients.find(peer_id);
// No client to deliver event
if (n == m_clients.end())
return;
n->second->notifyEvent(event);
}
if ((event == CSE_SetClientReady) ||
(event == CSE_Disconnect) ||
(event == CSE_SetDenied))
{
UpdatePlayerList();
}
}
u16 ClientInterface::getProtocolVersion(session_t peer_id)
{
RecursiveMutexAutoLock conlock(m_clients_mutex);
// Error check
RemoteClientMap::iterator n = m_clients.find(peer_id);
// No client to get version
if (n == m_clients.end())
return 0;
return n->second->net_proto_version;
}
void ClientInterface::setClientVersion(session_t peer_id, u8 major, u8 minor, u8 patch,
const std::string &full)
{
RecursiveMutexAutoLock conlock(m_clients_mutex);
// Error check
RemoteClientMap::iterator n = m_clients.find(peer_id);
// No client to set versions
if (n == m_clients.end())
return;
n->second->setVersionInfo(major, minor, patch, full);
}

1
src/.#clientiface.cpp
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lars@think.38580:1677862091