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Merge pull request #22427 from Faless/multiplayer_errors

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Better MultiplayerAPI error messages.
This commit is contained in:
Max Hilbrunner 2018-09-25 21:39:14 +02:00 committed by GitHub
commit 8fc92ae86f
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 106 additions and 59 deletions
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165
core/io/multiplayer_api.cpp
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@ -38,20 +38,23 @@ _FORCE_INLINE_ bool _should_call_local(MultiplayerAPI::RPCMode mode, bool is_mas
switch (mode) {
case MultiplayerAPI::RPC_MODE_DISABLED: {
//do nothing
// Do nothing.
} break;
case MultiplayerAPI::RPC_MODE_REMOTE: {
//do nothing also, no need to call local
// Do nothing also. Remote cannot produce a local call.
} break;
case MultiplayerAPI::RPC_MODE_MASTERSYNC: {
if (is_master)
r_skip_rpc = true; // I am the master, so skip remote call.
} // Do not break, fall over to other sync.
case MultiplayerAPI::RPC_MODE_REMOTESYNC:
case MultiplayerAPI::RPC_MODE_MASTERSYNC:
case MultiplayerAPI::RPC_MODE_PUPPETSYNC: {
//call it, sync always results in call
// Call it, sync always results in a local call.
return true;
} break;
case MultiplayerAPI::RPC_MODE_MASTER: {
if (is_master)
r_skip_rpc = true; //no other master so..
r_skip_rpc = true; // I am the master, so skip remote call.
return is_master;
} break;
case MultiplayerAPI::RPC_MODE_PUPPET: {
@ -91,7 +94,7 @@ void MultiplayerAPI::poll() {
network_peer->poll();
if (!network_peer.is_valid()) //it's possible that polling might have resulted in a disconnection, so check here
if (!network_peer.is_valid()) // It's possible that polling might have resulted in a disconnection, so check here.
return;
while (network_peer->get_available_packet_count()) {
@ -110,7 +113,7 @@ void MultiplayerAPI::poll() {
rpc_sender_id = 0;
if (!network_peer.is_valid()) {
break; //it's also possible that a packet or RPC caused a disconnection, so also check here
break; // It's also possible that a packet or RPC caused a disconnection, so also check here.
}
}
}
@ -157,7 +160,9 @@ Ref<NetworkedMultiplayerPeer> MultiplayerAPI::get_network_peer() const {
void MultiplayerAPI::_process_packet(int p_from, const uint8_t *p_packet, int p_packet_len) {
ERR_EXPLAIN("Multiplayer root node was not initialized. If you are using custom multiplayer, remember to set the root node via MultiplayerAPI.set_root_node before using it");
ERR_FAIL_COND(root_node == NULL);
ERR_EXPLAIN("Invalid packet received. Size too small.");
ERR_FAIL_COND(p_packet_len < 1);
uint8_t packet_type = p_packet[0];
@ -177,13 +182,15 @@ void MultiplayerAPI::_process_packet(int p_from, const uint8_t *p_packet, int p_
case NETWORK_COMMAND_REMOTE_CALL:
case NETWORK_COMMAND_REMOTE_SET: {
ERR_EXPLAIN("Invalid packet received. Size too small.");
ERR_FAIL_COND(p_packet_len < 6);
Node *node = _process_get_node(p_from, p_packet, p_packet_len);
ERR_EXPLAIN("Invalid packet received. Requested node was not found.");
ERR_FAIL_COND(node == NULL);
//detect cstring end
// Detect cstring end.
int len_end = 5;
for (; len_end < p_packet_len; len_end++) {
if (p_packet[len_end] == 0) {
@ -191,6 +198,7 @@ void MultiplayerAPI::_process_packet(int p_from, const uint8_t *p_packet, int p_
}
}
ERR_EXPLAIN("Invalid packet received. Size too small.");
ERR_FAIL_COND(len_end >= p_packet_len);
StringName name = String::utf8((const char *)&p_packet[5]);
@ -219,9 +227,11 @@ Node *MultiplayerAPI::_process_get_node(int p_from, const uint8_t *p_packet, int
Node *node = NULL;
if (target & 0x80000000) {
//use full path (not cached yet)
// Use full path (not cached yet).
int ofs = target & 0x7FFFFFFF;
ERR_EXPLAIN("Invalid packet received. Size smaller than declared.");
ERR_FAIL_COND_V(ofs >= p_packet_len, NULL);
String paths;
@ -234,17 +244,19 @@ Node *MultiplayerAPI::_process_get_node(int p_from, const uint8_t *p_packet, int
if (!node)
ERR_PRINTS("Failed to get path from RPC: " + String(np));
} else {
//use cached path
// Use cached path.
int id = target;
Map<int, PathGetCache>::Element *E = path_get_cache.find(p_from);
ERR_EXPLAIN("Invalid packet received. Requests invalid peer cache.");
ERR_FAIL_COND_V(!E, NULL);
Map<int, PathGetCache::NodeInfo>::Element *F = E->get().nodes.find(id);
ERR_EXPLAIN("Invalid packet received. Unabled to find requested cached node.");
ERR_FAIL_COND_V(!F, NULL);
PathGetCache::NodeInfo *ni = &F->get();
//do proper caching later
// Do proper caching later.
node = root_node->get_node(ni->path);
if (!node)
@ -255,9 +267,10 @@ Node *MultiplayerAPI::_process_get_node(int p_from, const uint8_t *p_packet, int
void MultiplayerAPI::_process_rpc(Node *p_node, const StringName &p_name, int p_from, const uint8_t *p_packet, int p_packet_len, int p_offset) {
ERR_EXPLAIN("Invalid packet received. Size too small.");
ERR_FAIL_COND(p_offset >= p_packet_len);
// Check that remote can call the RPC on this node
// Check that remote can call the RPC on this node.
RPCMode rpc_mode = RPC_MODE_DISABLED;
const Map<StringName, RPCMode>::Element *E = p_node->get_node_rpc_mode(p_name);
if (E) {
@ -265,6 +278,8 @@ void MultiplayerAPI::_process_rpc(Node *p_node, const StringName &p_name, int p_
} else if (p_node->get_script_instance()) {
rpc_mode = p_node->get_script_instance()->get_rpc_mode(p_name);
}
ERR_EXPLAIN("RPC '" + String(p_name) + "' is not allowed from: " + itos(p_from) + ". Mode is " + itos((int)rpc_mode) + ", master is " + itos(p_node->get_network_master()) + ".");
ERR_FAIL_COND(!_can_call_mode(p_node, rpc_mode, p_from));
int argc = p_packet[p_offset];
@ -277,11 +292,14 @@ void MultiplayerAPI::_process_rpc(Node *p_node, const StringName &p_name, int p_
for (int i = 0; i < argc; i++) {
ERR_EXPLAIN("Invalid packet received. Size too small.");
ERR_FAIL_COND(p_offset >= p_packet_len);
int vlen;
Error err = decode_variant(args.write[i], &p_packet[p_offset], p_packet_len - p_offset, &vlen);
ERR_EXPLAIN("Invalid packet received. Unable to decode RPC argument.");
ERR_FAIL_COND(err != OK);
//args[i]=p_packet[3+i];
argp.write[i] = &args[i];
p_offset += vlen;
}
@ -298,9 +316,10 @@ void MultiplayerAPI::_process_rpc(Node *p_node, const StringName &p_name, int p_
void MultiplayerAPI::_process_rset(Node *p_node, const StringName &p_name, int p_from, const uint8_t *p_packet, int p_packet_len, int p_offset) {
ERR_EXPLAIN("Invalid packet received. Size too small.");
ERR_FAIL_COND(p_offset >= p_packet_len);
// Check that remote can call the RSET on this node
// Check that remote can call the RSET on this node.
RPCMode rset_mode = RPC_MODE_DISABLED;
const Map<StringName, RPCMode>::Element *E = p_node->get_node_rset_mode(p_name);
if (E) {
@ -308,10 +327,15 @@ void MultiplayerAPI::_process_rset(Node *p_node, const StringName &p_name, int p
} else if (p_node->get_script_instance()) {
rset_mode = p_node->get_script_instance()->get_rset_mode(p_name);
}
ERR_EXPLAIN("RSET '" + String(p_name) + "' is not allowed from: " + itos(p_from) + ". Mode is " + itos((int)rset_mode) + ", master is " + itos(p_node->get_network_master()) + ".");
ERR_FAIL_COND(!_can_call_mode(p_node, rset_mode, p_from));
Variant value;
decode_variant(value, &p_packet[p_offset], p_packet_len - p_offset);
Error err = decode_variant(value, &p_packet[p_offset], p_packet_len - p_offset);
ERR_EXPLAIN("Invalid packet received. Unable to decode RSET value.");
ERR_FAIL_COND(err != OK);
bool valid;
@ -324,6 +348,7 @@ void MultiplayerAPI::_process_rset(Node *p_node, const StringName &p_name, int p
void MultiplayerAPI::_process_simplify_path(int p_from, const uint8_t *p_packet, int p_packet_len) {
ERR_EXPLAIN("Invalid packet received. Size too small.");
ERR_FAIL_COND(p_packet_len < 5);
int id = decode_uint32(&p_packet[1]);
@ -342,9 +367,7 @@ void MultiplayerAPI::_process_simplify_path(int p_from, const uint8_t *p_packet,
path_get_cache[p_from].nodes[id] = ni;
//send ack
//encode path
// Encode path to send ack.
CharString pname = String(path).utf8();
int len = encode_cstring(pname.get_data(), NULL);
@ -361,6 +384,7 @@ void MultiplayerAPI::_process_simplify_path(int p_from, const uint8_t *p_packet,
void MultiplayerAPI::_process_confirm_path(int p_from, const uint8_t *p_packet, int p_packet_len) {
ERR_EXPLAIN("Invalid packet received. Size too small.");
ERR_FAIL_COND(p_packet_len < 2);
String paths;
@ -369,31 +393,33 @@ void MultiplayerAPI::_process_confirm_path(int p_from, const uint8_t *p_packet,
NodePath path = paths;
PathSentCache *psc = path_send_cache.getptr(path);
ERR_EXPLAIN("Invalid packet received. Tries to confirm a path which was not found in cache.");
ERR_FAIL_COND(!psc);
Map<int, bool>::Element *E = psc->confirmed_peers.find(p_from);
ERR_EXPLAIN("Invalid packet received. Source peer was not found in cache for the given path.");
ERR_FAIL_COND(!E);
E->get() = true;
}
bool MultiplayerAPI::_send_confirm_path(NodePath p_path, PathSentCache *psc, int p_target) {
bool has_all_peers = true;
List<int> peers_to_add; //if one is missing, take note to add it
List<int> peers_to_add; // If one is missing, take note to add it.
for (Set<int>::Element *E = connected_peers.front(); E; E = E->next()) {
if (p_target < 0 && E->get() == -p_target)
continue; //continue, excluded
continue; // Continue, excluded.
if (p_target > 0 && E->get() != p_target)
continue; //continue, not for this peer
continue; // Continue, not for this peer.
Map<int, bool>::Element *F = psc->confirmed_peers.find(E->get());
if (!F || F->get() == false) {
//path was not cached, or was cached but is unconfirmed
// Path was not cached, or was cached but is unconfirmed.
if (!F) {
//not cached at all, take note
// Not cached at all, take note.
peers_to_add.push_back(E->get());
}
@ -401,11 +427,11 @@ bool MultiplayerAPI::_send_confirm_path(NodePath p_path, PathSentCache *psc, int
}
}
//those that need to be added, send a message for this
// Those that need to be added, send a message for this.
for (List<int>::Element *E = peers_to_add.front(); E; E = E->next()) {
//encode function name
// Encode function name.
CharString pname = String(p_path).utf8();
int len = encode_cstring(pname.get_data(), NULL);
@ -416,11 +442,11 @@ bool MultiplayerAPI::_send_confirm_path(NodePath p_path, PathSentCache *psc, int
encode_uint32(psc->id, &packet.write[1]);
encode_cstring(pname.get_data(), &packet.write[5]);
network_peer->set_target_peer(E->get()); //to all of you
network_peer->set_target_peer(E->get()); // To all of you.
network_peer->set_transfer_mode(NetworkedMultiplayerPeer::TRANSFER_MODE_RELIABLE);
network_peer->put_packet(packet.ptr(), packet.size());
psc->confirmed_peers.insert(E->get(), false); //insert into confirmed, but as false since it was not confirmed
psc->confirmed_peers.insert(E->get(), false); // Insert into confirmed, but as false since it was not confirmed.
}
return has_all_peers;
@ -459,35 +485,36 @@ void MultiplayerAPI::_send_rpc(Node *p_from, int p_to, bool p_unreliable, bool p
}
NodePath from_path = (root_node->get_path()).rel_path_to(p_from->get_path());
ERR_EXPLAIN("Unable to send RPC. Relative path is empty. THIS IS LIKELY A BUG IN THE ENGINE!");
ERR_FAIL_COND(from_path.is_empty());
//see if the path is cached
// See if the path is cached.
PathSentCache *psc = path_send_cache.getptr(from_path);
if (!psc) {
//path is not cached, create
// Path is not cached, create.
path_send_cache[from_path] = PathSentCache();
psc = path_send_cache.getptr(from_path);
psc->id = last_send_cache_id++;
}
//create base packet, lots of hardcode because it must be tight
// Create base packet, lots of hardcode because it must be tight.
int ofs = 0;
#define MAKE_ROOM(m_amount) \
if (packet_cache.size() < m_amount) packet_cache.resize(m_amount);
//encode type
// Encode type.
MAKE_ROOM(1);
packet_cache.write[0] = p_set ? NETWORK_COMMAND_REMOTE_SET : NETWORK_COMMAND_REMOTE_CALL;
ofs += 1;
//encode ID
// Encode ID.
MAKE_ROOM(ofs + 4);
encode_uint32(psc->id, &(packet_cache.write[ofs]));
ofs += 4;
//encode function name
// Encode function name.
CharString name = String(p_name).utf8();
int len = encode_cstring(name.get_data(), NULL);
MAKE_ROOM(ofs + len);
@ -495,20 +522,22 @@ void MultiplayerAPI::_send_rpc(Node *p_from, int p_to, bool p_unreliable, bool p
ofs += len;
if (p_set) {
//set argument
// Set argument.
Error err = encode_variant(*p_arg[0], NULL, len);
ERR_EXPLAIN("Unable to encode RSET value. THIS IS LIKELY A BUG IN THE ENGINE!");
ERR_FAIL_COND(err != OK);
MAKE_ROOM(ofs + len);
encode_variant(*p_arg[0], &(packet_cache.write[ofs]), len);
ofs += len;
} else {
//call arguments
// Call arguments.
MAKE_ROOM(ofs + 1);
packet_cache.write[ofs] = p_argcount;
ofs += 1;
for (int i = 0; i < p_argcount; i++) {
Error err = encode_variant(*p_arg[i], NULL, len);
ERR_EXPLAIN("Unable to encode RPC argument. THIS IS LIKELY A BUG IN THE ENGINE!");
ERR_FAIL_COND(err != OK);
MAKE_ROOM(ofs + len);
encode_variant(*p_arg[i], &(packet_cache.write[ofs]), len);
@ -516,21 +545,21 @@ void MultiplayerAPI::_send_rpc(Node *p_from, int p_to, bool p_unreliable, bool p
}
}
//see if all peers have cached path (is so, call can be fast)
// See if all peers have cached path (is so, call can be fast).
bool has_all_peers = _send_confirm_path(from_path, psc, p_to);
//take chance and set transfer mode, since all send methods will use it
// Take chance and set transfer mode, since all send methods will use it.
network_peer->set_transfer_mode(p_unreliable ? NetworkedMultiplayerPeer::TRANSFER_MODE_UNRELIABLE : NetworkedMultiplayerPeer::TRANSFER_MODE_RELIABLE);
if (has_all_peers) {
//they all have verified paths, so send fast
network_peer->set_target_peer(p_to); //to all of you
network_peer->put_packet(packet_cache.ptr(), ofs); //a message with love
// They all have verified paths, so send fast.
network_peer->set_target_peer(p_to); // To all of you.
network_peer->put_packet(packet_cache.ptr(), ofs); // A message with love.
} else {
//not all verified path, so send one by one
// Not all verified path, so send one by one.
//apend path at the end, since we will need it for some packets
// Append path at the end, since we will need it for some packets.
CharString pname = String(from_path).utf8();
int path_len = encode_cstring(pname.get_data(), NULL);
MAKE_ROOM(ofs + path_len);
@ -539,23 +568,23 @@ void MultiplayerAPI::_send_rpc(Node *p_from, int p_to, bool p_unreliable, bool p
for (Set<int>::Element *E = connected_peers.front(); E; E = E->next()) {
if (p_to < 0 && E->get() == -p_to)
continue; //continue, excluded
continue; // Continue, excluded.
if (p_to > 0 && E->get() != p_to)
continue; //continue, not for this peer
continue; // Continue, not for this peer.
Map<int, bool>::Element *F = psc->confirmed_peers.find(E->get());
ERR_CONTINUE(!F); //should never happen
ERR_CONTINUE(!F); // Should never happen.
network_peer->set_target_peer(E->get()); //to this one specifically
network_peer->set_target_peer(E->get()); // To this one specifically.
if (F->get() == true) {
//this one confirmed path, so use id
// This one confirmed path, so use id.
encode_uint32(psc->id, &(packet_cache.write[1]));
network_peer->put_packet(packet_cache.ptr(), ofs);
} else {
//this one did not confirm path yet, so use entire path (sorry!)
encode_uint32(0x80000000 | ofs, &(packet_cache.write[1])); //offset to path and flag
// This one did not confirm path yet, so use entire path (sorry!).
encode_uint32(0x80000000 | ofs, &(packet_cache.write[1])); // Offset to path and flag.
network_peer->put_packet(packet_cache.ptr(), ofs + path_len);
}
}
@ -570,7 +599,7 @@ void MultiplayerAPI::_add_peer(int p_id) {
void MultiplayerAPI::_del_peer(int p_id) {
connected_peers.erase(p_id);
path_get_cache.erase(p_id); //I no longer need your cache, sorry
path_get_cache.erase(p_id); // I no longer need your cache, sorry.
emit_signal("network_peer_disconnected", p_id);
}
@ -591,8 +620,12 @@ void MultiplayerAPI::_server_disconnected() {
void MultiplayerAPI::rpcp(Node *p_node, int p_peer_id, bool p_unreliable, const StringName &p_method, const Variant **p_arg, int p_argcount) {
ERR_FAIL_COND(!p_node->is_inside_tree());
ERR_EXPLAIN("Trying to call an RPC while no network peer is active.");
ERR_FAIL_COND(!network_peer.is_valid());
ERR_EXPLAIN("Trying to call an RPC on a node which is not inside SceneTree.");
ERR_FAIL_COND(!p_node->is_inside_tree());
ERR_EXPLAIN("Trying to call an RPC via a network peer which is not connected.");
ERR_FAIL_COND(network_peer->get_connection_status() != NetworkedMultiplayerPeer::CONNECTION_CONNECTED);
int node_id = network_peer->get_unique_id();
bool skip_rpc = false;
@ -601,7 +634,7 @@ void MultiplayerAPI::rpcp(Node *p_node, int p_peer_id, bool p_unreliable, const
bool is_master = p_node->is_network_master();
if (p_peer_id == 0 || p_peer_id == node_id || (p_peer_id < 0 && p_peer_id != -node_id)) {
//check that send mode can use local call
// Check that send mode can use local call.
const Map<StringName, RPCMode>::Element *E = p_node->get_node_rpc_mode(p_method);
if (E) {
@ -609,9 +642,9 @@ void MultiplayerAPI::rpcp(Node *p_node, int p_peer_id, bool p_unreliable, const
}
if (call_local_native) {
// done below
// Done below.
} else if (p_node->get_script_instance()) {
//attempt with script
// Attempt with script.
RPCMode rpc_mode = p_node->get_script_instance()->get_rpc_mode(p_method);
call_local_script = _should_call_local(rpc_mode, is_master, skip_rpc);
}
@ -647,15 +680,19 @@ void MultiplayerAPI::rpcp(Node *p_node, int p_peer_id, bool p_unreliable, const
void MultiplayerAPI::rsetp(Node *p_node, int p_peer_id, bool p_unreliable, const StringName &p_property, const Variant &p_value) {
ERR_FAIL_COND(!p_node->is_inside_tree());
ERR_EXPLAIN("Trying to RSET while no network peer is active.");
ERR_FAIL_COND(!network_peer.is_valid());
ERR_EXPLAIN("Trying to RSET on a node which is not inside SceneTree.");
ERR_FAIL_COND(!p_node->is_inside_tree());
ERR_EXPLAIN("Trying to send an RSET via a network peer which is not connected.");
ERR_FAIL_COND(network_peer->get_connection_status() != NetworkedMultiplayerPeer::CONNECTION_CONNECTED);
int node_id = network_peer->get_unique_id();
bool is_master = p_node->is_network_master();
bool skip_rset = false;
if (p_peer_id == 0 || p_peer_id == node_id || (p_peer_id < 0 && p_peer_id != -node_id)) {
//check that send mode can use local call
// Check that send mode can use local call.
bool set_local = false;
@ -675,7 +712,7 @@ void MultiplayerAPI::rsetp(Node *p_node, int p_peer_id, bool p_unreliable, const
return;
}
} else if (p_node->get_script_instance()) {
//attempt with script
// Attempt with script.
RPCMode rpc_mode = p_node->get_script_instance()->get_rset_mode(p_property);
set_local = _should_call_local(rpc_mode, is_master, skip_rset);
@ -703,8 +740,11 @@ void MultiplayerAPI::rsetp(Node *p_node, int p_peer_id, bool p_unreliable, const
Error MultiplayerAPI::send_bytes(PoolVector<uint8_t> p_data, int p_to, NetworkedMultiplayerPeer::TransferMode p_mode) {
ERR_EXPLAIN("Trying to send an empty raw packet.");
ERR_FAIL_COND_V(p_data.size() < 1, ERR_INVALID_DATA);
ERR_EXPLAIN("Trying to send a raw packet while no network peer is active.");
ERR_FAIL_COND_V(!network_peer.is_valid(), ERR_UNCONFIGURED);
ERR_EXPLAIN("Trying to send a raw packet via a network peer which is not connected.");
ERR_FAIL_COND_V(network_peer->get_connection_status() != NetworkedMultiplayerPeer::CONNECTION_CONNECTED, ERR_UNCONFIGURED);
MAKE_ROOM(p_data.size() + 1);
@ -720,6 +760,7 @@ Error MultiplayerAPI::send_bytes(PoolVector<uint8_t> p_data, int p_to, Networked
void MultiplayerAPI::_process_raw(int p_from, const uint8_t *p_packet, int p_packet_len) {
ERR_EXPLAIN("Invalid packet received. Size too small.");
ERR_FAIL_COND(p_packet_len < 2);
PoolVector<uint8_t> out;
@ -734,30 +775,36 @@ void MultiplayerAPI::_process_raw(int p_from, const uint8_t *p_packet, int p_pac
int MultiplayerAPI::get_network_unique_id() const {
ERR_EXPLAIN("No network peer is assigned. Unable to get unique network ID.");
ERR_FAIL_COND_V(!network_peer.is_valid(), 0);
return network_peer->get_unique_id();
}
bool MultiplayerAPI::is_network_server() const {
// XXX Maybe fail silently? Maybe should actually return true to make development of both local and online multiplayer easier?
ERR_EXPLAIN("No network peer is assigned. I can't be a server.");
ERR_FAIL_COND_V(!network_peer.is_valid(), false);
return network_peer->is_server();
}
void MultiplayerAPI::set_refuse_new_network_connections(bool p_refuse) {
ERR_EXPLAIN("No network peer is assigned. Unable to set 'refuse_new_connections'.");
ERR_FAIL_COND(!network_peer.is_valid());
network_peer->set_refuse_new_connections(p_refuse);
}
bool MultiplayerAPI::is_refusing_new_network_connections() const {
ERR_EXPLAIN("No network peer is assigned. Unable to get 'refuse_new_connections'.");
ERR_FAIL_COND_V(!network_peer.is_valid(), false);
return network_peer->is_refusing_new_connections();
}
Vector<int> MultiplayerAPI::get_network_connected_peers() const {
ERR_EXPLAIN("No network peer is assigned. Assume no peers are connected.");
ERR_FAIL_COND_V(!network_peer.is_valid(), Vector<int>());
Vector<int> ret;
@ -802,9 +849,9 @@ void MultiplayerAPI::_bind_methods() {
BIND_ENUM_CONSTANT(RPC_MODE_REMOTE);
BIND_ENUM_CONSTANT(RPC_MODE_MASTER);
BIND_ENUM_CONSTANT(RPC_MODE_PUPPET);
BIND_ENUM_CONSTANT(RPC_MODE_SLAVE); // deprecated
BIND_ENUM_CONSTANT(RPC_MODE_SLAVE); // Deprecated.
BIND_ENUM_CONSTANT(RPC_MODE_REMOTESYNC);
BIND_ENUM_CONSTANT(RPC_MODE_SYNC); // deprecated
BIND_ENUM_CONSTANT(RPC_MODE_SYNC); // Deprecated.
BIND_ENUM_CONSTANT(RPC_MODE_MASTERSYNC);
BIND_ENUM_CONSTANT(RPC_MODE_PUPPETSYNC);
}