// get_player_by_name(name)
int ModApiEnvMod::l_get_player_by_name(lua_State *L)
{
GET_ENV_PTR;
// Do it
const char *name = luaL_checkstring(L, 1);
RemotePlayer *player = dynamic_cast<RemotePlayer *>(env->getPlayer(name));
if (player == NULL){
lua_pushnil(L);
return 1;
}
PlayerSAO *sao = player->getPlayerSAO();
if(sao == NULL){
lua_pushnil(L);
return 1;
}
// Put player on stack
getScriptApiBase(L)->objectrefGetOrCreate(L, sao);
return 1;
}
void RemoteClient::GetNextBlocks (
ServerEnvironment *env,
EmergeManager * emerge,
float dtime,
std::vector<PrioritySortedBlockTransfer> &dest)
{
DSTACK(FUNCTION_NAME);
// Increment timers
m_nothing_to_send_pause_timer -= dtime;
m_nearest_unsent_reset_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() >= g_settings->getU16
("max_simultaneous_block_sends_per_client"))
{
//infostream<<"Not sending any blocks, Queue full."<<std::endl;
return;
}
v3f playerpos = sao->getBasePosition();
const v3f &playerspeed = player->getSpeed();
v3f playerspeeddir(0,0,0);
if(playerspeed.getLength() > 1.0*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->getPitch());
camera_dir.rotateXZBy(sao->getYaw());
/*infostream<<"camera_dir=("<<camera_dir.X<<","<<camera_dir.Y<<","
<<camera_dir.Z<<")"<<std::endl;*/
/*
Get the starting value of the block finder radius.
*/
if(m_last_center != center)
{
m_nearest_unsent_d = 0;
m_last_center = center;
}
/*infostream<<"m_nearest_unsent_reset_timer="
<<m_nearest_unsent_reset_timer<<std::endl;*/
// Reset periodically to workaround for some bugs or stuff
if(m_nearest_unsent_reset_timer > 20.0)
{
m_nearest_unsent_reset_timer = 0;
m_nearest_unsent_d = 0;
//infostream<<"Resetting m_nearest_unsent_d for "
// <<server->getPlayerName(peer_id)<<std::endl;
}
//s16 last_nearest_unsent_d = m_nearest_unsent_d;
s16 d_start = m_nearest_unsent_d;
//infostream<<"d_start="<<d_start<<std::endl;
u16 max_simul_sends_setting = g_settings->getU16
("max_simultaneous_block_sends_per_client");
u16 max_simul_sends_usually = max_simul_sends_setting;
/*
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 < g_settings->getFloat(
"full_block_send_enable_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 from the client
s16 wanted_range = sao->getWantedRange();
float camera_fov = sao->getFov();
// if FOV, wanted_range are not available (old client), fall back to old default
if (wanted_range <= 0) wanted_range = 1000;
if (camera_fov <= 0) camera_fov = (72.0*M_PI/180) * 4./3.;
const s16 full_d_max = MYMIN(g_settings->getS16("max_block_send_distance"), wanted_range);
const s16 d_opt = MYMIN(g_settings->getS16("block_send_optimize_distance"), wanted_range);
const s16 d_blocks_in_sight = full_d_max * BS * MAP_BLOCKSIZE;
//infostream << "Fov from client " << camera_fov << " full_d_max " << full_d_max << std::endl;
s16 d_max = full_d_max;
s16 d_max_gen = MYMIN(g_settings->getS16("max_block_generate_distance"), wanted_range);
// 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;
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);
const bool occ_cull = g_settings->getBool("server_side_occlusion_culling");
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 = max_simul_sends_setting;
// 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.
*/
f32 dist;
if (!isBlockInSight(p, camera_pos, camera_dir, camera_fov, d_blocks_in_sight, &dist)) {
continue;
}
/*
Don't send already sent blocks
*/
{
if(m_blocks_sent.find(p) != m_blocks_sent.end())
{
continue;
}
}
/*
Check if map has this block
*/
MapBlock *block = env->getMap().getBlockNoCreateNoEx(p);
bool surely_not_found_on_disk = false;
bool block_is_invalid = false;
if (block) {
// Reset usage timer, this block will be of use in the future.
block->resetUsageTimer();
// Block is dummy if data doesn't exist.
// It means it has been not found from disk and not generated
if (block->isDummy()) {
surely_not_found_on_disk = true;
}
if (!block->isGenerated())
block_is_invalid = 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->getDayNightDiff())
continue;
}
if (occ_cull && !block_is_invalid &&
env->getMap().isBlockOccluded(block, cam_pos_nodes)) {
continue;
}
}
/*
If block has been marked to not exist on disk (dummy)
and generating new ones is not wanted, skip block.
*/
if (!generate && surely_not_found_on_disk) {
// get next one.
continue;
}
/*
Add inexistent block to emerge queue.
*/
if(block == NULL || surely_not_found_on_disk || block_is_invalid)
{
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 = 2.0;
} 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 Server::handleCommand_Init_Legacy(NetworkPacket* pkt) {
const auto peer_id = pkt->getPeerId();
auto & packet = *(pkt->packet);
RemoteClient* client = getClient(pkt->getPeerId(), CS_Created);
std::string addr_s;
try {
addr_s = getPeerAddress(pkt->getPeerId()).serializeString();
} catch (std::exception &e) {
/*
* no peer for this packet found
* most common reason is peer timeout, e.g. peer didn't
* respond for some time, your server was overloaded or
* things like that.
*/
infostream << "Server::ProcessData(): Canceling: peer "
<< pkt->getPeerId() << " not found : " << e.what() << std::endl;
return;
}
// If net_proto_version is set, this client has already been handled
if(client->getState() > CS_Created) {
verbosestream << "Server: Ignoring multiple TOSERVER_INITs from "
<< addr_s << " (peer_id=" << peer_id << ")" << std::endl;
return;
}
verbosestream << "Server: Got TOSERVER_INIT from " << addr_s << " (peer_id="
<< peer_id << ")" << std::endl;
// Do not allow multiple players in simple singleplayer mode.
// This isn't a perfect way to do it, but will suffice for now
if(m_simple_singleplayer_mode && m_clients.getClientIDs().size() > 1) {
infostream << "Server: Not allowing another client (" << addr_s
<< ") to connect in simple singleplayer mode" << std::endl;
DenyAccess(peer_id, "Running in simple singleplayer mode.");
return;
}
// First byte after command is maximum supported
// serialization version
u8 client_max;
packet[TOSERVER_INIT_LEGACY_FMT].convert(client_max);
u8 our_max = SER_FMT_VER_HIGHEST_READ;
// Use the highest version supported by both
int deployed = std::min(client_max, our_max);
// If it's lower than the lowest supported, give up.
if (deployed < SER_FMT_VER_LOWEST_READ)
deployed = SER_FMT_VER_INVALID;
if (deployed == SER_FMT_VER_INVALID) {
actionstream << "Server: A mismatched client tried to connect from "
<< addr_s << std::endl;
infostream << "Server: Cannot negotiate serialization version with "
<< addr_s << std::endl;
DenyAccess(peer_id, std::string(
"Your client's version is not supported.\n"
"Server version is ")
+ (g_version_string) + "."
);
return;
}
client->setPendingSerializationVersion(deployed);
/*
Read and check network protocol version
*/
u16 min_net_proto_version = 0;
packet[TOSERVER_INIT_LEGACY_PROTOCOL_VERSION_MIN].convert(min_net_proto_version);
u16 max_net_proto_version = min_net_proto_version;
packet[TOSERVER_INIT_LEGACY_PROTOCOL_VERSION_MAX].convert(max_net_proto_version);
packet.convert_safe(TOSERVER_INIT_LEGACY_PROTOCOL_VERSION_FM, client->net_proto_version_fm);
// Start with client's maximum version
u16 net_proto_version = max_net_proto_version;
// Figure out a working version if it is possible at all
if(max_net_proto_version >= SERVER_PROTOCOL_VERSION_MIN ||
min_net_proto_version <= SERVER_PROTOCOL_VERSION_MAX) {
// If maximum is larger than our maximum, go with our maximum
if(max_net_proto_version > SERVER_PROTOCOL_VERSION_MAX)
net_proto_version = SERVER_PROTOCOL_VERSION_MAX;
// Else go with client's maximum
else
net_proto_version = max_net_proto_version;
}
verbosestream << "Server: " << addr_s << ": Protocol version: min: "
<< min_net_proto_version << ", max: " << max_net_proto_version
<< ", chosen: " << net_proto_version << std::endl;
client->net_proto_version = net_proto_version;
if(net_proto_version < SERVER_PROTOCOL_VERSION_MIN ||
net_proto_version > SERVER_PROTOCOL_VERSION_MAX) {
actionstream << "Server: A mismatched client tried to connect from "
<< addr_s << std::endl;
DenyAccess(peer_id, std::string(
"Your client's version is not supported.\n"
"Server version is ")
+ (g_version_string) + ",\n"
+ "server's PROTOCOL_VERSION is "
+ itos(SERVER_PROTOCOL_VERSION_MIN)
+ "..."
+ itos(SERVER_PROTOCOL_VERSION_MAX)
+ ", client's PROTOCOL_VERSION is "
+ itos(min_net_proto_version)
+ "..."
+ itos(max_net_proto_version)
);
return;
}
if(g_settings->getBool("strict_protocol_version_checking")) {
if(net_proto_version != LATEST_PROTOCOL_VERSION) {
actionstream << "Server: A mismatched (strict) client tried to "
<< "connect from " << addr_s << std::endl;
DenyAccess(peer_id, std::string(
"Your client's version is not supported.\n"
"Server version is ")
+ (g_version_string) + ",\n"
+ "server's PROTOCOL_VERSION (strict) is "
+ itos(LATEST_PROTOCOL_VERSION)
+ ", client's PROTOCOL_VERSION is "
+ itos(min_net_proto_version)
+ "..."
+ itos(max_net_proto_version)
);
return;
}
}
/*
Set up player
*/
// Get player name
std::string playername;
packet[TOSERVER_INIT_LEGACY_NAME].convert(playername);
if(playername.empty()) {
actionstream << "Server: Player with an empty name "
<< "tried to connect from " << addr_s << std::endl;
DenyAccess(peer_id, "Empty name");
return;
}
if(!g_settings->getBool("enable_any_name") && string_allowed(playername, PLAYERNAME_ALLOWED_CHARS) == false) {
actionstream << "Server: Player with an invalid name [" << playername
<< "] tried to connect from " << addr_s << std::endl;
DenyAccess(peer_id, "Name contains unallowed characters");
return;
}
if(!isSingleplayer() && playername == "singleplayer") {
actionstream << "Server: Player with the name \"singleplayer\" "
<< "tried to connect from " << addr_s << std::endl;
DenyAccess(peer_id, "Name is not allowed");
return;
}
{
std::string reason;
if(m_script->on_prejoinplayer(playername, addr_s, &reason)) {
actionstream << "Server: Player with the name \"" << playername << "\" "
<< "tried to connect from " << addr_s << " "
<< "but it was disallowed for the following reason: "
<< reason << std::endl;
DenyAccess(peer_id, reason);
return;
}
}
infostream << "Server: New connection: \"" << playername << "\" from "
<< addr_s << " (peer_id=" << peer_id << ")" << std::endl;
// Get password
std::string given_password;
packet[TOSERVER_INIT_LEGACY_PASSWORD].convert(given_password);
if(!base64_is_valid(given_password.c_str())) {
actionstream << "Server: " << playername
<< " supplied invalid password hash" << std::endl;
DenyAccess(peer_id, "Invalid password hash");
return;
}
// Enforce user limit.
// Don't enforce for users that have some admin right
if(m_clients.getClientIDs(CS_Created).size() >= g_settings->getU16("max_users") &&
!checkPriv(playername, "server") &&
!checkPriv(playername, "ban") &&
!checkPriv(playername, "privs") &&
!checkPriv(playername, "password") &&
playername != g_settings->get("name")) {
actionstream << "Server: " << playername << " tried to join, but there"
<< " are already max_users="
<< g_settings->getU16("max_users") << " players." << std::endl;
DenyAccess(peer_id, "Too many users.");
return;
}
std::string checkpwd; // Password hash to check against
bool has_auth = m_script->getAuth(playername, &checkpwd, NULL);
// If no authentication info exists for user, create it
if(!has_auth) {
if(!isSingleplayer() &&
g_settings->getBool("disallow_empty_password") &&
given_password == "") {
actionstream << "Server: " << playername
<< " supplied empty password" << std::endl;
DenyAccess(peer_id, "Empty passwords are "
"disallowed. Set a password and try again.");
return;
}
std::string raw_default_password = g_settings->get("default_password");
std::string initial_password =
translate_password(playername, raw_default_password);
// If default_password is empty, allow any initial password
if (raw_default_password.length() == 0)
initial_password = given_password;
m_script->createAuth(playername, initial_password);
}
has_auth = m_script->getAuth(playername, &checkpwd, NULL);
if(!has_auth) {
actionstream << "Server: " << playername << " cannot be authenticated"
<< " (auth handler does not work?)" << std::endl;
DenyAccess(peer_id, "Not allowed to login");
return;
}
if(given_password != checkpwd) {
actionstream << "Server: " << playername << " supplied wrong password"
<< " at " << addr_s
<< std::endl;
DenyAccess(peer_id, "Wrong password");
return;
}
RemotePlayer *player =
static_cast<RemotePlayer*>(m_env->getPlayer(playername.c_str()));
if (player && player->peer_id != 0) {
if (given_password.size()) {
actionstream << "Server: " << playername << " rejoining" << std::endl;
DenyAccessVerCompliant(player->peer_id, player->protocol_version, SERVER_ACCESSDENIED_ALREADY_CONNECTED);
player->getPlayerSAO()->removingFromEnvironment();
m_env->removePlayer(player);
player = nullptr;
} else {
errorstream << "Server: " << playername << ": Failed to emerge player" << " (player allocated to an another client)" << std::endl;
DenyAccess(peer_id, "Another client is connected with this "
"name. If your client closed unexpectedly, try again in "
"a minute.");
}
}
m_clients.setPlayerName(peer_id, playername);
/*
Answer with a TOCLIENT_INIT
*/
{
MSGPACK_PACKET_INIT(TOCLIENT_INIT_LEGACY, 6);
PACK(TOCLIENT_INIT_DEPLOYED, deployed);
PACK(TOCLIENT_INIT_SEED, m_env->getServerMap().getSeed());
PACK(TOCLIENT_INIT_STEP, g_settings->getFloat("dedicated_server_step"));
//if (player) //todo : remake me
// PACK(TOCLIENT_INIT_POS, player->getPosition());
Settings params;
m_emerge->params.save(params);
PACK(TOCLIENT_INIT_MAP_PARAMS, params);
PACK(TOCLIENT_INIT_PROTOCOL_VERSION_FM, SERVER_PROTOCOL_VERSION_FM);
PACK(TOCLIENT_INIT_WEATHER, g_settings->getBool("weather"));
// Send as reliable
m_clients.send(peer_id, 0, buffer, true);
m_clients.event(peer_id, CSE_InitLegacy);
}
return;
}