--- a/network.c Sat Sep 11 19:18:30 2004 +0000
+++ b/network.c Sat Sep 11 19:34:11 2004 +0000
@@ -79,6 +79,15 @@
#if defined(ENABLE_NETWORK)
+enum {
+ PACKET_TYPE_WELCOME = 0,
+ PACKET_TYPE_READY,
+ PACKET_TYPE_ACK,
+ PACKET_TYPE_SYNC,
+ PACKET_TYPE_XMIT,
+ PACKET_TYPE_COMMAND,
+};
+
// sent from client -> server whenever the client wants to exec a command.
// send from server -> client when another player execs a command.
typedef struct CommandPacket {
@@ -92,8 +101,6 @@
uint32 dp[8];
} CommandPacket;
-assert_compile(sizeof(CommandPacket) == 16 + 32);
-
#define COMMAND_PACKET_BASE_SIZE (sizeof(CommandPacket) - 8 * sizeof(uint32))
// sent from server -> client periodically to tell the client about the current tick in the server
@@ -107,13 +114,12 @@
uint32 random_seed_2;
} SyncPacket;
-assert_compile(sizeof(SyncPacket) == 12);
-
// sent from server -> client as an acknowledgement that the server received the command.
// the command will be executed at the current value of "max".
typedef struct AckPacket {
byte packet_length;
byte packet_type;
+ byte when;
} AckPacket;
typedef struct ReadyPacket {
@@ -124,16 +130,16 @@
typedef struct FilePacketHdr {
byte packet_length;
byte packet_type;
- byte unused[2];
} FilePacketHdr;
-assert_compile(sizeof(FilePacketHdr) == 4);
-
// sent from server to client when the client has joined.
typedef struct WelcomePacket {
byte packet_length;
byte packet_type;
- byte unused[2];
+ uint32 player_seeds[MAX_PLAYERS][2];
+ uint32 frames_max;
+ uint32 frames_srv;
+ uint32 frames_cnt;
} WelcomePacket;
typedef struct Packet Packet;
@@ -155,19 +161,17 @@
Packet *head, **last;
uint buflen; // receive buffer len
- byte buf[256]; // receive buffer
+ byte buf[1024]; // receive buffer
} ClientState;
-static uint _not_packet;
-
typedef struct QueuedCommand QueuedCommand;
struct QueuedCommand {
QueuedCommand *next;
CommandPacket cp;
CommandCallback *callback;
uint32 cmd;
- int32 frame;
+ uint32 frame;
};
typedef struct CommandQueue CommandQueue;
@@ -195,7 +199,7 @@
static uint16 _network_client_timeout;
typedef struct FutureSeeds {
- int32 frame;
+ uint32 frame;
uint32 seed[2];
} FutureSeeds;
@@ -223,6 +227,8 @@
};
void NetworkUDPSend(bool client, struct sockaddr_in recv,struct UDPPacket packet);
+static void CloseClient(ClientState *cs);
+void NetworkSendWelcome(ClientState *cs, bool direct);
uint32 _network_ip_list[10]; // network ip list
@@ -340,6 +346,16 @@
return qp;
}
+static void QueueClear(CommandQueue *nq) {
+ QueuedCommand *qp;
+ while ((qp=nq->head)) {
+ // unlink it.
+ if (!(nq->head = qp->next)) nq->last = &nq->head;
+ free(qp);
+ }
+ nq->last = &nq->head;
+}
+
// go through the player queues for each player and see if there are any pending commands
// that should be executed this frame. if there are, execute them.
void NetworkProcessCommands()
@@ -416,6 +432,20 @@
} while (len -= n);
}
+// send data direct to a client
+static void SendDirectBytes(ClientState *cs, void *bytes, uint len)
+{
+ char *buf = (char*)bytes;
+ uint n;
+
+ n = send(cs->socket, buf, len, 0);
+ if (n == -1) {
+ int err = GET_LAST_ERROR();
+ DEBUG(net, 0) ("[NET] send() failed with error %d", err);
+ CloseClient(cs);
+ }
+}
+
// client:
// add it to the client's ack queue, and send the command to the server
// server:
@@ -427,7 +457,7 @@
ClientState *cs;
qp = AllocQueuedCommand(_networking_server ? &_command_queue : &_ack_queue);
- qp->cp.packet_type = 0;
+ qp->cp.packet_type = PACKET_TYPE_COMMAND;
qp->cp.tile = tile;
qp->cp.p1 = p1;
qp->cp.p2 = p2;
@@ -438,7 +468,7 @@
qp->callback = callback;
// so the server knows when to execute it.
- qp->frame = _frame_counter_max;
+ qp->frame = _frame_counter + 5;
// calculate the amount of extra bytes.
nump = 8;
@@ -480,6 +510,7 @@
QueuedCommand *qp;
ClientState *c;
AckPacket ap;
+ int i;
DEBUG(net, 2) ("[NET] cmd size %d", np->packet_length);
@@ -489,21 +520,28 @@
qp = AllocQueuedCommand(&_command_queue);
qp->cp = *np;
- qp->frame = _frame_counter_max;
+ i = _frame_counter_max - (_frame_counter + 3);
+
+ if (i<0) {
+ qp->frame = _frame_counter_max ;
+ } else {
+ qp->frame = _frame_counter + 3;
+ }
qp->callback = NULL;
// extra params
memcpy(&qp->cp.dp, np->dp, np->packet_length - COMMAND_PACKET_BASE_SIZE);
- ap.packet_type = 2;
- ap.packet_length = 2;
+ ap.packet_type = PACKET_TYPE_ACK;
+ ap.when = _frame_counter_max-(qp->frame);
+ ap.packet_length = sizeof(AckPacket);
// send it to the peers
if (_networking_server) {
for(c=_clients; c->socket != INVALID_SOCKET; c++) {
if (c == cs) {
- SendBytes(c, &ap, 2);
+ SendDirectBytes(c, &ap, ap.packet_length);
} else {
if (!cs->inactive) SendBytes(c, &qp->cp, qp->cp.packet_length);
}
@@ -540,7 +578,7 @@
s1 = TO_LE32(sp->random_seed_1);
s2 = TO_LE32(sp->random_seed_2);
- DEBUG(net, 3) ("[NET] sync seeds: [1]=%i rnd[2]=%i", sp->random_seed_1, sp->random_seed_2);
+ DEBUG(net, 3) ("[NET] sync seeds: frame=%i 1=%i 2=%i",_frame_counter, sp->random_seed_1, sp->random_seed_2);
if (_frame_counter_srv <= _frame_counter) {
// we are ahead of the server check if the seed is in our list.
@@ -561,7 +599,7 @@
// sent from server -> client as an acknowledgement that the server received the command.
// the command will be executed at the current value of "max".
-static void HandleAckPacket()
+static void HandleAckPacket(AckPacket * ap)
{
QueuedCommand *q;
// move a packet from the ack queue to the end of this player's queue.
@@ -569,12 +607,12 @@
assert(q);
if (!(_ack_queue.head = q->next)) _ack_queue.last = &_ack_queue.head;
q->next = NULL;
- q->frame = _frame_counter_max;
+ q->frame = (_frame_counter_max - (ap->when));
*_command_queue.last = q;
_command_queue.last = &q->next;
- DEBUG(net, 2) ("[NET] ack");
+ DEBUG(net, 2) ("[NET] ack [frame=%i]",q->frame);
}
static void HandleFilePacket(FilePacketHdr *fp)
@@ -619,6 +657,28 @@
}
}
+static void HandleWelcomePacket(WelcomePacket *wp) {
+ int i;
+ for (i=0; i<MAX_PLAYERS; i++) {
+ _player_seeds[i][0]=wp->player_seeds[i][0];
+ _player_seeds[i][1]=wp->player_seeds[i][1];
+ }
+ if (wp->frames_srv != 0) {
+ _frame_counter_max = wp->frames_max;
+ _frame_counter_srv = wp->frames_srv;
+ }
+ if (wp->frames_cnt != 0) {
+ _frame_counter = wp->frames_cnt;
+ }
+}
+
+static void HandleReadyPacket(ReadyPacket *rp, ClientState *cs)
+{
+ cs->ready=true;
+ cs->timeout=_network_client_timeout;
+}
+
+
static void CloseClient(ClientState *cs)
{
Packet *p, *next;
@@ -680,24 +740,26 @@
size -= packet[0];
pos += packet[0];
switch(packet[1]) {
- case 0:
+ case PACKET_TYPE_WELCOME:
+ HandleWelcomePacket((WelcomePacket *)packet);
+ break;
+ case PACKET_TYPE_COMMAND:
HandleCommandPacket(cs, (CommandPacket*)packet);
break;
- case 1:
+ case PACKET_TYPE_SYNC:
assert(_networking_sync || _networking_queuing);
assert(!_networking_server);
HandleSyncPacket((SyncPacket*)packet);
break;
- case 2:
+ case PACKET_TYPE_ACK:
assert(!_networking_server);
- HandleAckPacket();
+ HandleAckPacket((AckPacket*)packet);
break;
- case 3:
+ case PACKET_TYPE_XMIT:
HandleFilePacket((FilePacketHdr*)packet);
break;
- case 5:
- cs->ready=true;
- cs->timeout=_network_client_timeout;
+ case PACKET_TYPE_READY:
+ HandleReadyPacket((ReadyPacket*)packet, cs);
break;
default:
DEBUG (net,0) ("net: unknown packet type");
@@ -783,8 +845,7 @@
n = minu(_transmit_file_size - pos, 248);
hdr.packet_length = n + sizeof(hdr);
- hdr.packet_type = 3;
- hdr.unused[0] = hdr.unused[1] = 0;
+ hdr.packet_type = PACKET_TYPE_XMIT;
SendBytes(cs, &hdr, sizeof(hdr));
if (n == 0) {
@@ -797,6 +858,10 @@
cs->xmitpos = pos + 1;
+ if (cs->xmitpos == 0) {
+ NetworkSendWelcome(cs,false);
+ }
+
DEBUG(net, 2) ("[NET] client xmit at %d", pos + 1);
}
@@ -819,17 +884,65 @@
void NetworkSendReadyPacket()
{
- if (!_network_ready_sent) {
+ if ((!_network_ready_sent) && (_frame_counter + _network_ready_ahead >= _frame_counter_max)) {
ReadyPacket *rp = malloc(sizeof(rp));
ClientState *c = _clients;
- rp->packet_type = 5;
+ rp->packet_type = PACKET_TYPE_READY;
rp->packet_length = sizeof(rp);
SendBytes(c, rp, sizeof(rp));
_network_ready_sent = true;
}
}
+void NetworkSendSyncPackets()
+{
+ ClientState *cs;
+ uint32 new_max;
+ SyncPacket sp;
+
+ new_max = _frame_counter + (int)_network_sync_freq;
+
+ DEBUG(net,3) ("net: serv: sync frame=%i,max=%i, seed1=%i, seed2=%i",new_max,_sync_seed_1,_sync_seed_2);
+
+ sp.packet_length = sizeof(sp);
+ sp.packet_type = PACKET_TYPE_SYNC;
+ sp.frames = new_max - _frame_counter_max;
+ sp.server = _frame_counter_max - _frame_counter;
+ sp.random_seed_1 = TO_LE32(_sync_seed_1);
+ sp.random_seed_2 = TO_LE32(_sync_seed_2);
+ _frame_counter_max = new_max;
+
+ // send it to all the clients and mark them unready
+ for(cs=_clients;cs->socket != INVALID_SOCKET; cs++) {
+ cs->ready=false;
+ SendBytes(cs, &sp, sizeof(sp));
+ }
+
+}
+
+void NetworkSendWelcome(ClientState *cs, bool direct) {
+ WelcomePacket wp;
+ int i;
+ wp.packet_type = PACKET_TYPE_WELCOME;
+ wp.packet_length = sizeof(WelcomePacket);
+ for (i=0; i<MAX_PLAYERS; i++) {
+ wp.player_seeds[i][0]=_player_seeds[i][0];
+ wp.player_seeds[i][1]=_player_seeds[i][1];
+ }
+ if (direct) {
+ wp.frames_max=0;
+ wp.frames_srv=0;
+ wp.frames_cnt=_frame_counter;
+ SendDirectBytes(cs,(void *)&wp,wp.packet_length);
+ } else {
+ wp.frames_max=_frame_counter_max;
+ wp.frames_srv=_frame_counter_srv;
+ wp.frames_cnt=0;
+ SendBytes(cs,(void *)&wp,wp.packet_length);
+ }
+}
+
static void NetworkAcceptClients()
{
struct sockaddr_in sin;
@@ -888,12 +1001,12 @@
// send the commands in the server queue to the new client.
QueuedCommand *qp;
SyncPacket sp;
- int32 frame;
+ uint32 frame;
DEBUG(net, 2) ("[NET] sending queued commands to client");
sp.packet_length = sizeof(sp);
- sp.packet_type = 1;
+ sp.packet_type = PACKET_TYPE_SYNC;
sp.random_seed_1 = sp.random_seed_2 = 0;
sp.server = 0;
@@ -918,6 +1031,25 @@
}
+
+bool NetworkCheckClientReady() {
+ bool ready_all = true;
+ uint16 count = 0;
+ ClientState *cs;
+
+ for(cs=_clients;cs->socket != INVALID_SOCKET; cs++) {
+ count++;
+ ready_all = ready_all && (cs->ready || cs->inactive || (cs->xmitpos>0));
+ if (!cs->ready) cs->timeout-=1;
+ if (cs->timeout == 0) {
+ SET_DPARAM16(0,count);
+ ShowErrorMessage(-1,STR_NETWORK_ERR_TIMEOUT,0,0);
+ CloseClient(cs);
+ }
+ }
+ return ready_all;
+}
+
// ************************** //
// * TCP Networking * //
// ************************** //
@@ -1077,6 +1209,8 @@
// send queue of commands to client.
SendQueuedCommandsToNewClient(cs);
+
+ NetworkSendWelcome(cs, true);
}
}
}
@@ -1086,61 +1220,6 @@
{
ClientState *cs;
void *free_xmit;
- uint16 count;
- bool ready_all;
-
- // send sync packets?
- if (_networking_server && _networking_sync && !_pause) {
-
- if (++_not_packet >= _network_sync_freq) {
- SyncPacket sp;
- uint new_max;
-
- _network_ahead_frames = _network_sync_freq + 1;
-
- ready_all=false;
-
- while (!ready_all) {
- // check wether all clients are ready
- ready_all=true;
- count=0;
- for(cs=_clients;cs->socket != INVALID_SOCKET; cs++) {
- count++;
- ready_all = ready_all && (cs->ready || cs->inactive || (cs->xmitpos>0));
- if (!cs->ready) cs->timeout-=5;
- if (cs->timeout == 0) {
- SET_DPARAM16(0,count);
- ShowErrorMessage(-1,STR_NETWORK_ERR_TIMEOUT,0,0);
- CloseClient(cs);
- }
- }
- if (!ready_all) {
- NetworkReceive();
- CSleep(5);
- }
- }
-
- _not_packet = 0;
-
- new_max = max(_frame_counter + (int)_network_ahead_frames, _frame_counter_max);
-
- DEBUG(net,3) ("net: serv: sync max=%i, seed1=%i, seed2=%i",new_max,_sync_seed_1,_sync_seed_2);
-
- sp.packet_length = sizeof(sp);
- sp.packet_type = 1;
- sp.frames = new_max - _frame_counter_max;
- sp.server = _frame_counter_max - _frame_counter;
- sp.random_seed_1 = TO_LE32(_sync_seed_1);
- sp.random_seed_2 = TO_LE32(_sync_seed_2);
- _frame_counter_max = new_max;
-
- // send it to all the clients and mark them unready
- for(cs=_clients;cs->socket != INVALID_SOCKET; cs++) {
- cs->ready=false;
- SendBytes(cs, &sp, sizeof(sp));
- }
- }
- }
free_xmit = _transmit_file;
@@ -1168,8 +1247,9 @@
{
ClientState *cs;
+ QueueClear(&_command_queue);
+ QueueClear(&_ack_queue);
_command_queue.last = &_command_queue.head;
- _ack_queue.last = &_ack_queue.head;
// invalidate all clients
for(cs=_clients; cs != &_clients[MAX_CLIENTS]; cs++)
@@ -1455,7 +1535,7 @@
DEBUG(net, 3) ("[NET][Core] init()");
_network_available=true;
-_network_client_timeout=3000;
+_network_client_timeout=300;
// [win32] winsock startup
@@ -1631,19 +1711,12 @@
if (_networking) {
NetworkReceive();
- NetworkProcessCommands(); // to check if we got any new commands belonging to the current frame before we increase it.
}
} else {
- // outgoing
-
- if ((_networking) && (!_networking_server) && (_frame_counter+_network_ready_ahead >= _frame_counter_max)) {
- // send the "i" am ready message to the server
- // [_network_ready_ahead] frames before "i" reach the frame-limit
- NetworkSendReadyPacket();
- }
-
+ if ( _udp_client_socket != INVALID_SOCKET ) NetworkUDPReceive(true);
+ if ( _udp_server_socket != INVALID_SOCKET ) NetworkUDPReceive(false);
if (_networking) {
NetworkSend();