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Location: cpp/openttd-patchpack/source/network.c
r423:c15cfc680b31
49.6 KiB
text/x-c
(svn r621) Merge r450 to trunk:
Cleanups and #if 0 some unused debug code
Cleanups and #if 0 some unused debug code
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1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 | #include "stdafx.h"
#include "ttd.h"
#include "gui.h"
#include "command.h"
#include "player.h"
#include "console.h"
#include "economy.h"
#if defined(WIN32)
# include <windows.h>
# include <winsock.h>
# pragma comment (lib, "ws2_32.lib")
# define ENABLE_NETWORK
# define GET_LAST_ERROR() WSAGetLastError()
# define EWOULDBLOCK WSAEWOULDBLOCK
#endif
#if defined(UNIX)
// Make compatible with WIN32 names
# define SOCKET int
# define INVALID_SOCKET -1
// we need different defines for MorphOS and AmigaOS
#if !defined(__MORPHOS__) && !defined(__AMIGA__)
# define ioctlsocket ioctl
# define closesocket close
# define GET_LAST_ERROR() errno
#endif
// Need this for FIONREAD on solaris
# define BSD_COMP
# include <unistd.h>
# include <sys/ioctl.h>
// Socket stuff
# include <sys/socket.h>
# include <netinet/in.h>
# include <arpa/inet.h>
# include <errno.h>
# include <sys/time.h>
// NetDB
# include <netdb.h>
# ifndef TCP_NODELAY
# define TCP_NODELAY 0x0001
# endif
#endif
#if defined(__MORPHOS__) || defined(__AMIGA__)
# include <exec/types.h>
# include <proto/exec.h> // required for Open/CloseLibrary()
# if defined(__MORPHOS__)
# include <sys/filio.h> // FION#? defines
# else // __AMIGA__
# include <proto/socket.h>
# endif
// make source compatible with bsdsocket.library functions
# define closesocket(s) CloseSocket(s)
# define GET_LAST_ERROR() Errno()
# define ioctlsocket(s,request,status) IoctlSocket((LONG)s,(ULONG)request,(char*)status)
struct Library *SocketBase = NULL;
#if !defined(__MORPHOS__)
// usleep() implementation
#include <devices/timer.h>
#include <dos/dos.h>
struct Device *TimerBase = NULL;
struct MsgPort *TimerPort = NULL;
struct timerequest *TimerRequest = NULL;
#endif
#endif /* __MORPHOS__ || __AMIGA__ */
#define SEND_MTU 1460
#if defined(ENABLE_NETWORK)
enum {
PACKET_TYPE_WELCOME = 0,
PACKET_TYPE_READY,
PACKET_TYPE_ACK,
PACKET_TYPE_SYNC,
PACKET_TYPE_FSYNC,
PACKET_TYPE_XMIT,
PACKET_TYPE_COMMAND,
PACKET_TYPE_EVENT,
};
// 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 {
byte packet_length;
byte packet_type;
uint16 cmd;
uint32 p1,p2;
TileIndex tile;
byte player;// player id, this is checked by the server.
byte when; // offset from the current max_frame value minus 1. this is set by the server.
uint32 dp[8];
} CommandPacket;
typedef struct EventPacket {
byte packet_length;
byte packet_type;
byte event_type;
byte data_start;
} EventPacket;
#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
// and how far the client may progress.
typedef struct SyncPacket {
byte packet_length;
byte packet_type;
byte frames; // how many more frames may the client execute? this is relative to the old value of max.
byte server; // where is the server currently executing? this is negatively relative to the old value of max.
uint32 random_seed_1; // current random state at server. used to detect out of sync.
uint32 random_seed_2;
} SyncPacket;
typedef struct FrameSyncPacket {
byte packet_length;
byte packet_type;
byte frames; // where is the server currently executing? this is negatively relative to the old value of max.
} FrameSyncPacket;
// 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;
int16 when;
} AckPacket;
typedef struct ReadyPacket {
byte packet_length;
byte packet_type;
} ReadyPacket;
typedef struct FilePacketHdr {
byte packet_length;
byte packet_type;
} FilePacketHdr;
// sent from server to client when the client has joined.
typedef struct WelcomePacket {
byte packet_length;
byte packet_type;
uint32 player_seeds[MAX_PLAYERS][2];
uint32 frames_max;
uint32 frames_srv;
uint32 frames_cnt;
} WelcomePacket;
typedef struct Packet Packet;
struct Packet {
Packet *next; // this one has to be the first element.
uint siz;
byte buf[SEND_MTU]; // packet payload
};
typedef struct ClientState {
int socket;
bool inactive; // disable sending of commands/syncs to client
bool writable;
bool ready;
uint timeout;
uint xmitpos;
uint eaten;
Packet *head, **last;
uint buflen; // receive buffer len
byte buf[1024]; // receive buffer
} ClientState;
typedef struct QueuedCommand QueuedCommand;
struct QueuedCommand {
QueuedCommand *next;
CommandPacket cp;
CommandCallback *callback;
uint32 cmd;
uint32 frame;
};
typedef struct CommandQueue CommandQueue;
struct CommandQueue {
QueuedCommand *head, **last;
};
#define MAX_CLIENTS (MAX_PLAYERS + 1)
// packets waiting to be executed, for each of the players.
// this list is sorted in frame order, so the item on the front will be executed first.
static CommandQueue _command_queue;
// in the client, this is the list of commands that have not yet been acked.
// when it is acked, it will be moved to the appropriate position at the end of the player queue.
static CommandQueue _ack_queue;
static ClientState _clients[MAX_CLIENTS];
static int _num_clients;
// keep a history of the 16 most recent seeds to be able to capture out of sync errors.
static uint32 _my_seed_list[16][2];
static bool _network_ready_sent;
static uint32 _frame_fsync_last;
typedef struct FutureSeeds {
uint32 frame;
uint32 seed[2];
} FutureSeeds;
// remember some future seeds that the server sent to us.
static FutureSeeds _future_seed[8];
static uint _num_future_seed;
static SOCKET _listensocket; // tcp socket
static SOCKET _udp_client_socket; // udp server socket
static SOCKET _udp_server_socket; // udp client socket
typedef struct UDPPacket {
byte command_code;
byte data_len;
byte command_check;
byte data[255];
} UDPPacket;
enum {
NET_UDPCMD_SERVERSEARCH = 1,
NET_UDPCMD_SERVERACTIVE,
NET_UDPCMD_GETSERVERINFO,
NET_UDPCMD_SERVERINFO,
};
void NetworkUDPSend(bool client, struct sockaddr_in recv,struct UDPPacket packet);
static void HandleCommandPacket(ClientState *cs, CommandPacket *np);
static void CloseClient(ClientState *cs);
void NetworkSendWelcome(ClientState *cs, bool direct);
uint32 _network_ip_list[10]; // network ip list
// this is set to point to the savegame
static byte *_transmit_file;
static size_t _transmit_file_size;
static FILE *_recv_file;
/* multi os compatible sleep function */
void CSleep(int milliseconds) {
#if defined(WIN32)
Sleep(milliseconds);
#endif
#if defined(UNIX)
#if !defined(__BEOS__) && !defined(__MORPHOS__) && !defined(__AMIGAOS__)
usleep(milliseconds*1000);
#endif
#ifdef __BEOS__
snooze(milliseconds*1000);
#endif
#if defined(__MORPHOS__)
usleep(milliseconds*1000);
#endif
#if defined(__AMIGAOS__) && !defined(__MORPHOS__)
{
ULONG signals;
ULONG TimerSigBit = 1 << TimerPort->mp_SigBit;
// send IORequest
TimerRequest->tr_node.io_Command = TR_ADDREQUEST;
TimerRequest->tr_time.tv_secs = (milliseconds * 1000) / 1000000;
TimerRequest->tr_time.tv_micro = (milliseconds * 1000) % 1000000;
SendIO((struct IORequest *)TimerRequest);
if ( !((signals = Wait(TimerSigBit|SIGBREAKF_CTRL_C)) & TimerSigBit) ) {
AbortIO((struct IORequest *)TimerRequest);
}
WaitIO((struct IORequest *)TimerRequest);
}
#endif // __AMIGAOS__ && !__MORPHOS__
#endif
}
//////////////////////////////////////////////////////////////////////
// ****************************** //
// * Network Error Handlers * //
// ****************************** //
static void NetworkHandleSaveGameError()
{
_networking_sync = false;
_networking_queuing = true;
_switch_mode = SM_MENU;
_switch_mode_errorstr = STR_NETWORK_ERR_SAVEGAMEERROR;
}
static void NetworkHandleConnectionLost()
{
_networking_sync = false;
_networking_queuing = true;
_switch_mode = SM_MENU;
_switch_mode_errorstr = STR_NETWORK_ERR_LOSTCONNECTION;
}
static void NetworkHandleDeSync()
{
DEBUG(net, 0) ("NET: error: network sync error at frame %i", _frame_counter);
{
int i;
for (i=15; i>=0; i--) DEBUG(net,0) ("NET frame %i: [0]=%i, [1]=%i",_frame_counter-(i+1),_my_seed_list[i][0],_my_seed_list[i][1]);
for (i=0; i<8; i++) DEBUG(net,0) ("NET frame %i: [0]=%i, [1]=%i",_frame_counter+i,_future_seed[i].seed[0],_future_seed[i].seed[1]);
}
_networking_sync = false;
_networking_queuing = true;
_switch_mode = SM_MENU;
_switch_mode_errorstr = STR_NETWORK_ERR_DESYNC;
}
// ****************************** //
// * TCP Packets and Handlers * //
// ****************************** //
static QueuedCommand *AllocQueuedCommand(CommandQueue *nq)
{
QueuedCommand *qp = (QueuedCommand*)calloc(sizeof(QueuedCommand), 1);
assert(qp);
*nq->last = qp;
nq->last = &qp->next;
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;
}
static int GetNextSyncFrame()
{
uint32 newframe;
if (_frame_fsync_last == 0) return -11;
newframe = (_frame_fsync_last + 11); // do not use a multiple of 4 since that screws up sync-packets
return (_frame_counter_max - newframe);
}
// 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()
{
CommandQueue *nq;
QueuedCommand *qp;
byte old_player;
// queue mode ?
if (_networking_queuing)
return;
nq = &_command_queue;
while ( (qp=nq->head) && (!_networking_sync || qp->frame <= _frame_counter)) {
// unlink it.
if (!(nq->head = qp->next)) nq->last = &nq->head;
if (qp->frame < _frame_counter && _networking_sync) {
DEBUG(net,0) ("warning: !qp->cp.frame < _frame_counter, %d < %d [%d]\n", qp->frame, _frame_counter, _frame_counter_srv+4);
}
// run the command
old_player = _current_player;
_current_player = qp->cp.player;
memcpy(_decode_parameters, qp->cp.dp, (qp->cp.packet_length - COMMAND_PACKET_BASE_SIZE));
DoCommandP(qp->cp.tile, qp->cp.p1, qp->cp.p2, qp->callback, qp->cmd | CMD_DONT_NETWORK);
free(qp);
_current_player = old_player;
}
if (!_networking_server) {
// remember the random seed so we can check if we're out of sync.
_my_seed_list[_frame_counter & 15][0] = _sync_seed_1;
_my_seed_list[_frame_counter & 15][1] = _sync_seed_2;
while (_num_future_seed) {
assert(_future_seed[0].frame >= _frame_counter);
if (_future_seed[0].frame != _frame_counter) break;
if (_future_seed[0].seed[0] != _sync_seed_1 ||_future_seed[0].seed[1] != _sync_seed_2) NetworkHandleDeSync();
memcpy_overlapping(_future_seed, _future_seed + 1, --_num_future_seed * sizeof(FutureSeeds));
}
}
}
// send a packet to a client
static void SendBytes(ClientState *cs, void *bytes, uint len)
{
byte *b = (byte*)bytes;
uint n;
Packet *p;
assert(len != 0);
// see if there's space in the last packet?
if (!cs->head || (p = (Packet*)cs->last, p->siz == sizeof(p->buf)))
p = NULL;
do {
if (!p) {
// need to allocate a new packet buffer.
p = (Packet*)malloc(sizeof(Packet));
// insert at the end of the linked list.
*cs->last = p;
cs->last = &p->next;
p->next = NULL;
p->siz = 0;
}
// copy bytes to packet.
n = minu(sizeof(p->buf) - p->siz, len);
memcpy(p->buf + p->siz, b, n);
p->siz += n;
b += n;
p = NULL;
} 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: %i] send() failed with error %d", _frame_counter, err);
CloseClient(cs);
}
}
// client:
// add it to the client's ack queue, and send the command to the server
// server:
// add it to the server's player queue, and send it to all clients.
void NetworkSendCommand(TileIndex tile, uint32 p1, uint32 p2, uint32 cmd, CommandCallback *callback)
{
int nump;
QueuedCommand *qp;
ClientState *cs;
CommandPacket cp;
if (!(cmd & CMD_NET_INSTANT)) {
qp = AllocQueuedCommand(_networking_server ? &_command_queue : &_ack_queue);
} else {
qp = (QueuedCommand*)calloc(sizeof(QueuedCommand), 1);
}
qp->cp.packet_type = PACKET_TYPE_COMMAND;
qp->cp.tile = tile;
qp->cp.p1 = p1;
qp->cp.p2 = p2;
qp->cp.cmd = (uint16)cmd;
qp->cp.player = _local_player;
qp->cp.when = 0;
qp->cmd = cmd;
qp->callback = callback;
// so the server knows when to execute it.
qp->frame = _frame_counter_max - GetNextSyncFrame();
// calculate the amount of extra bytes.
nump = 8;
while ( nump != 0 && ((uint32*)_decode_parameters)[nump-1] == 0) nump--;
qp->cp.packet_length = COMMAND_PACKET_BASE_SIZE + nump * sizeof(uint32);
if (nump != 0) memcpy(qp->cp.dp, _decode_parameters, nump * sizeof(uint32));
cp = qp->cp;
// convert to little endian
cp.tile = TO_LE16(cp.tile);
cp.p1 = TO_LE32(cp.p1);
cp.p2 = TO_LE32(cp.p2);
cp.cmd = TO_LE16(cp.cmd);
// send it to the peers
for(cs=_clients; cs->socket != INVALID_SOCKET; cs++) if (!cs->inactive) SendBytes(cs, &cp, cp.packet_length);
if (cmd & CMD_NET_INSTANT) {
free(qp);
}
}
void NetworkSendEvent(uint16 type, uint16 data_len, void * data)
{
EventPacket * ep;
ClientState *cs;
// encode the event ... add its data
ep=malloc(data_len+sizeof(EventPacket)-1);
ep->event_type = type;
ep->packet_length = data_len+sizeof(EventPacket)-1;
ep->packet_type = PACKET_TYPE_EVENT;
memcpy(&ep->data_start,data,data_len);
// send it to the peers
for(cs=_clients; cs->socket != INVALID_SOCKET; cs++) if (!cs->inactive) SendBytes(cs, ep, ep->packet_length);
// free the temp packet
free(ep);
}
// client:
// server sends a command from another player that we should execute.
// put it in the command queue.
//
// server:
// client sends a command that it wants to execute.
// fill the when field so the client knows when to execute it.
// put it in the appropriate player queue.
// send it to all other clients.
// send an ack packet to the actual client.
static void HandleCommandPacket(ClientState *cs, CommandPacket *np)
{
QueuedCommand *qp;
ClientState *c;
AckPacket ap;
uint16 cmd;
DEBUG(net, 2) ("NET: %i] cmd size %d", _frame_counter, np->packet_length);
assert(np->packet_length >= COMMAND_PACKET_BASE_SIZE);
cmd = FROM_LE16(np->cmd);
if (!(cmd & CMD_NET_INSTANT)) {
// put it into the command queue
qp = AllocQueuedCommand(&_command_queue);
} else {
qp = (QueuedCommand*)calloc(sizeof(QueuedCommand), 1);
}
qp->cp = *np;
qp->frame = _frame_counter_max - GetNextSyncFrame();
qp->callback = NULL;
// extra params
memcpy(&qp->cp.dp, np->dp, np->packet_length - COMMAND_PACKET_BASE_SIZE);
ap.packet_type = PACKET_TYPE_ACK;
ap.when = TO_LE16(GetNextSyncFrame());
ap.packet_length = sizeof(AckPacket);
DEBUG(net,4)("NET: %i] NewACK: frame=%i %i",_frame_counter, ap.when,_frame_counter_max - GetNextSyncFrame());
// send it to the peers
if (_networking_server) {
for(c=_clients; c->socket != INVALID_SOCKET; c++) {
if (c == cs) {
if (!(cmd & CMD_NET_INSTANT)) SendDirectBytes(c, &ap, ap.packet_length);
} else {
if (!cs->inactive) SendBytes(c, &qp->cp, qp->cp.packet_length);
}
}
}
// convert from little endian to big endian?
#if defined(TTD_BIG_ENDIAN)
qp->cp.cmd = FROM_LE16(qp->cp.cmd);
qp->cp.tile = FROM_LE16(qp->cp.tile);
qp->cp.p1 = FROM_LE32(qp->cp.p1);
qp->cp.p2 = FROM_LE32(qp->cp.p2);
#endif
qp->cmd = qp->cp.cmd;
if (cmd & CMD_NET_INSTANT) {
byte p = _current_player;
_current_player = qp->cp.player;
memcpy(_decode_parameters, qp->cp.dp, (qp->cp.packet_length - COMMAND_PACKET_BASE_SIZE));
DoCommandP(qp->cp.tile, qp->cp.p1, qp->cp.p2, qp->callback, qp->cmd | CMD_DONT_NETWORK);
free(qp);
_current_player = p;
}
}
static void HandleEventPacket(EventPacket *ep)
{
switch (ep->event_type) {
case NET_EVENT_SUBSIDY:
RemoteSubsidyAdd((Subsidy *)&ep->data_start);
break;
}
}
// sent from server -> client periodically to tell the client about the current tick in the server
// and how far the client may progress.
static void HandleSyncPacket(SyncPacket *sp)
{
uint32 s1,s2;
_frame_counter_srv = _frame_counter_max - sp->server;
_frame_counter_max += sp->frames;
// reset network ready packet state
_network_ready_sent = false;
// queueing only?
if (_networking_queuing || _frame_counter == 0)
return;
s1 = FROM_LE32(sp->random_seed_1);
s2 = FROM_LE32(sp->random_seed_2);
DEBUG(net, 3) ("NET: %i] sync seeds: 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.
if (_frame_counter_srv + 16 > _frame_counter) {
// the random seed exists in our array check it.
if (s1 != _my_seed_list[_frame_counter_srv & 0xF][0] || s2 != _my_seed_list[_frame_counter_srv & 0xF][1]) NetworkHandleDeSync();
}
} else {
// the server's frame has not been executed yet. store the server's seed in a list.
if (_num_future_seed < lengthof(_future_seed)) {
_future_seed[_num_future_seed].frame = _frame_counter_srv;
_future_seed[_num_future_seed].seed[0] = s1;
_future_seed[_num_future_seed].seed[1] = s2;
_num_future_seed++;
}
}
}
static void HandleFSyncPacket(FrameSyncPacket *fsp)
{
DEBUG(net,3)("NET: %i] FSYNC: srv=%i %i",_frame_counter, fsp->frames,(_frame_counter_max - fsp->frames));
if (fsp->frames < 1) return;
_frame_fsync_last = _frame_counter_srv = _frame_counter_max - fsp->frames;
}
// 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(AckPacket * ap)
{
QueuedCommand *q;
// move a packet from the ack queue to the end of this player's queue.
q = _ack_queue.head;
assert(q);
if (!(_ack_queue.head = q->next)) _ack_queue.last = &_ack_queue.head;
q->next = NULL;
q->frame = (_frame_counter_max - (FROM_LE16(ap->when)));
*_command_queue.last = q;
_command_queue.last = &q->next;
DEBUG(net, 2) ("NET %i] ack [frame=%i]",_frame_counter,q->frame);
}
static void HandleFilePacket(FilePacketHdr *fp)
{
int n = fp->packet_length - sizeof(FilePacketHdr);
char tempfile[512];
sprintf(tempfile, "%s/networkc.tmp", _path.personal_dir);
if (n == 0) {
assert(_networking_queuing);
assert(!_networking_sync);
// eof
if (_recv_file) { fclose(_recv_file); _recv_file = NULL; }
// attempt loading the game.
_game_mode = GM_NORMAL;
if (SaveOrLoad(tempfile, SL_LOAD) != SL_OK) {
NetworkCoreDisconnect();
NetworkHandleSaveGameError();
return;
}
// sync to server.
_networking_queuing = false;
NetworkStartSync(false);
if (_network_playas == 0) {
// send a command to make a new player
_local_player = 0;
NetworkSendCommand(0, 0, 0, CMD_PLAYER_CTRL, NULL);
_local_player = OWNER_SPECTATOR;
} else {
// take control over an existing company
if (DEREF_PLAYER(_network_playas-1)->is_active)
_local_player = _network_playas-1;
else
_local_player = OWNER_SPECTATOR;
}
} else {
if(!_recv_file) {
_recv_file = fopen(tempfile, "wb");
if (!_recv_file) error("can't open savefile");
}
fwrite( (char*)fp + sizeof(*fp), n, 1, _recv_file);
}
}
static void HandleWelcomePacket(WelcomePacket *wp)
{
int i;
for (i=0; i<MAX_PLAYERS; i++) {
_player_seeds[i][0] = FROM_LE32(wp->player_seeds[i][0]);
_player_seeds[i][1] = FROM_LE32(wp->player_seeds[i][1]);
}
if (wp->frames_srv != 0) {
_frame_counter_max = FROM_LE32(wp->frames_max);
_frame_counter_srv = FROM_LE32(wp->frames_srv);
}
if (wp->frames_cnt != 0) {
_frame_counter = FROM_LE32(wp->frames_cnt);
}
}
static void HandleReadyPacket(ReadyPacket *rp, ClientState *cs)
{
cs->ready=true;
cs->timeout=_network_client_timeout;
DEBUG(net,1) ("NET: %i] ready packet recv", _frame_counter);
}
static void CloseClient(ClientState *cs)
{
Packet *p, *next;
DEBUG(net, 1) ("[NET][TCP] closed client connection");
assert(cs->socket != INVALID_SOCKET);
closesocket(cs->socket);
// free buffers
for(p = cs->head; p; p=next) {
next = p->next;
free(p);
}
// copy up structs...
while ((cs+1)->socket != INVALID_SOCKET) {
*cs = *(cs+1);
cs++;
}
cs->socket = INVALID_SOCKET;
if (_networking_server) _network_game.players_on--;
_num_clients--;
}
#define NETWORK_BUFFER_SIZE 4096
static bool ReadPackets(ClientState *cs)
{
byte network_buffer[NETWORK_BUFFER_SIZE];
uint pos,size;
unsigned long recv_bytes;
size = cs->buflen;
for(;;) {
if (size != 0) memcpy(network_buffer, cs->buf, size);
recv_bytes = recv(cs->socket, (char*)network_buffer + size, sizeof(network_buffer) - size, 0);
if ( recv_bytes == (unsigned long)-1) {
int err = GET_LAST_ERROR();
if (err == EWOULDBLOCK) break;
DEBUG(net, 0) ("[NET] recv() failed with error %d", err);
CloseClient(cs);
return false;
}
// no more bytes for now?
if (recv_bytes == 0)
break;
size += recv_bytes; // number of bytes read.
pos = 0;
while (size >= 2) {
byte *packet = network_buffer + pos;
// whole packet not there yet?
if (size < packet[0]) break;
size -= packet[0];
pos += packet[0];
switch(packet[1]) {
case PACKET_TYPE_WELCOME:
HandleWelcomePacket((WelcomePacket *)packet);
break;
case PACKET_TYPE_COMMAND:
HandleCommandPacket(cs, (CommandPacket*)packet);
break;
case PACKET_TYPE_SYNC:
assert(_networking_sync || _networking_queuing);
assert(!_networking_server);
HandleSyncPacket((SyncPacket*)packet);
break;
case PACKET_TYPE_FSYNC:
HandleFSyncPacket((FrameSyncPacket *)packet);
break;
case PACKET_TYPE_ACK:
assert(!_networking_server);
HandleAckPacket((AckPacket*)packet);
break;
case PACKET_TYPE_XMIT:
HandleFilePacket((FilePacketHdr*)packet);
break;
case PACKET_TYPE_READY:
HandleReadyPacket((ReadyPacket*)packet, cs);
break;
case PACKET_TYPE_EVENT:
HandleEventPacket((EventPacket*)packet);
break;
default:
DEBUG (net,0) ("NET: %i] unknown packet type",_frame_counter);
}
}
assert(size < sizeof(cs->buf));
memcpy(cs->buf, network_buffer + pos, size);
}
cs->buflen = size;
return true;
}
static bool SendPackets(ClientState *cs)
{
Packet *p;
int n;
uint nskip = cs->eaten, nsent = nskip;
// try sending as much as possible.
for(p=cs->head; p ;p = p->next) {
if (p->siz) {
assert(nskip < p->siz);
n = send(cs->socket, p->buf + nskip, p->siz - nskip, 0);
if (n == -1) {
int err = GET_LAST_ERROR();
if (err == EWOULDBLOCK) break;
DEBUG(net, 0) ("[NET] send() failed with error %d", err);
CloseClient(cs);
return false;
}
nsent += n;
// send was not able to send it all? then we assume that the os buffer is full and break.
if (nskip + n != p->siz)
break;
nskip = 0;
}
}
// nsent bytes in the linked list are not invalid. free as many buffers as possible.
// don't actually free the last buffer.
while (nsent) {
p = cs->head;
assert(p->siz != 0);
// some bytes of the packet are still unsent.
if ( (int)(nsent - p->siz) < 0)
break;
nsent -= p->siz;
p->siz = 0;
if (p->next) {
cs->head = p->next;
free(p);
}
}
cs->eaten = nsent;
return true;
}
// transmit the file..
static void SendXmit(ClientState *cs)
{
uint pos, n;
FilePacketHdr hdr;
int p;
// if too many unsent bytes left in buffer, don't send more.
if (cs->head && cs->head->next)
return;
pos = cs->xmitpos - 1;
p = 20;
do {
// compute size of data to xmit
n = minu(_transmit_file_size - pos, 248);
hdr.packet_length = n + sizeof(hdr);
hdr.packet_type = PACKET_TYPE_XMIT;
SendBytes(cs, &hdr, sizeof(hdr));
if (n == 0) {
pos = -1; // eof
break;
}
SendBytes(cs, _transmit_file + pos, n);
pos += n;
} while (--p);
cs->xmitpos = pos + 1;
if (cs->xmitpos == 0) {
NetworkSendWelcome(cs,false);
}
DEBUG(net, 2) ("[NET] client xmit at %d", pos + 1);
}
static ClientState *AllocClient(SOCKET s)
{
ClientState *cs;
if (_num_clients == MAX_CLIENTS)
return NULL;
if (_networking_server) _network_game.players_on++;
cs = &_clients[_num_clients++];
memset(cs, 0, sizeof(*cs));
cs->last = &cs->head;
cs->socket = s;
cs->timeout = _network_client_timeout;
return cs;
}
void NetworkSendReadyPacket()
{
if ((!_network_ready_sent) && (_frame_counter + _network_ready_ahead >= _frame_counter_max)) {
ReadyPacket rp;
DEBUG(net,1) ("NET: %i] ready packet sent", _frame_counter);
rp.packet_type = PACKET_TYPE_READY;
rp.packet_length = sizeof(rp);
SendBytes(_clients, &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: %i] serv: sync max=%i, seed1=%i, seed2=%i",_frame_counter,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, sp.packet_length);
}
}
void NetworkSendFrameSyncPackets()
{
ClientState *cs;
FrameSyncPacket fsp;
if ((_frame_counter + 4) < _frame_counter_max) if ((_frame_fsync_last + 4 < _frame_counter)) {
// this packet mantains some information about on which frame the server is
fsp.frames = _frame_counter_max - _frame_counter;
fsp.packet_type = PACKET_TYPE_FSYNC;
fsp.packet_length = sizeof (FrameSyncPacket);
// send it to all the clients and mark them unready
for(cs=_clients;cs->socket != INVALID_SOCKET; cs++) {
SendBytes(cs, &fsp, fsp.packet_length);
}
_frame_fsync_last = _frame_counter;
}
}
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]=TO_LE32(_player_seeds[i][0]);
wp.player_seeds[i][1]=TO_LE32(_player_seeds[i][1]);
}
if (direct) {
wp.frames_max=0;
wp.frames_srv=0;
wp.frames_cnt=TO_LE32(_frame_counter);
SendDirectBytes(cs,(void *)&wp,wp.packet_length);
} else {
wp.frames_max=TO_LE32(_frame_counter_max);
wp.frames_srv=TO_LE32(_frame_counter_srv);
wp.frames_cnt=0;
SendBytes(cs,(void *)&wp,wp.packet_length);
}
}
static void NetworkAcceptClients()
{
struct sockaddr_in sin;
SOCKET s;
ClientState *cs;
#ifndef __MORPHOS__
int sin_len;
#else
LONG sin_len; // for some reason we need a 'LONG' under MorphOS
#endif
assert(_listensocket != INVALID_SOCKET);
for(;;) {
sin_len = sizeof(sin);
s = accept(_listensocket, (struct sockaddr*)&sin, &sin_len);
if (s == INVALID_SOCKET) return;
// set nonblocking mode for client socket
{ unsigned long blocking = 1; ioctlsocket(s, FIONBIO, &blocking); }
DEBUG(net, 1) ("NET: %i] got client from %s", _frame_counter, inet_ntoa(sin.sin_addr));
// set nodelay
{int b = 1; setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (const char*)&b, sizeof(b));}
cs = AllocClient(s);
if (cs == NULL) {
// no more clients allowed?
closesocket(s);
continue;
}
if (_networking_sync) {
// a new client has connected. it needs a snapshot.
cs->inactive = true;
}
}
// when a new client has joined. it needs different information depending on if it's at the game menu or in an active game.
// Game menu:
// - list of players already in the game (name, company name, face, color)
// - list of game settings and patch settings
// Active game:
// - the state of the world (includes player name, company name, player face, player color)
// - list of the patch settings
// Networking can be in several "states".
// * not sync - games don't need to be in sync, and frame counter is not synced. for example intro screen. all commands are executed immediately.
// * sync - games are in sync
}
static void SendQueuedCommandsToNewClient(ClientState *cs)
{
// send the commands in the server queue to the new client.
QueuedCommand *qp;
SyncPacket sp;
uint32 frame;
DEBUG(net, 2) ("NET: %i] sending queued commands to client",_frame_counter);
sp.packet_length = sizeof(sp);
sp.packet_type = PACKET_TYPE_SYNC;
sp.random_seed_1 = sp.random_seed_2 = 0;
sp.server = 0;
frame = _frame_counter;
for(qp=_command_queue.head; qp; qp = qp->next) {
DEBUG(net, 4) ("NET: %i] sending cmd to be executed at %d (old %d)", _frame_counter, qp->frame, frame);
if (qp->frame > frame) {
assert(qp->frame <= _frame_counter_max);
sp.frames = qp->frame - frame;
frame = qp->frame;
SendBytes(cs, &sp, sizeof(sp));
}
SendBytes(cs, &qp->cp, qp->cp.packet_length);
}
if (frame < _frame_counter_max) {
DEBUG(net, 4) ("NET: %i] sending queued sync %d (%d)",_frame_counter, _frame_counter_max, frame);
sp.frames = _frame_counter_max - frame;
SendBytes(cs, &sp, sizeof(sp));
}
}
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 * //
// ************************** //
unsigned long NetworkResolveHost(const char *hostname)
{
struct hostent* remotehost;
if ((hostname[0]<0x30) || (hostname[0]>0x39)) {
// seems to be an hostname [first character is no number]
remotehost = gethostbyname(hostname);
if (remotehost == NULL) {
DEBUG(net, 1) ("[NET][IP] cannot resolve %s", hostname);
return 0;
} else {
DEBUG(net, 1) ("[NET][IP] resolved %s to %s",hostname, inet_ntoa(*(struct in_addr *) remotehost->h_addr_list[0]));
return inet_addr(inet_ntoa(*(struct in_addr *) remotehost->h_addr_list[0]));
}
} else {
// seems to be an ip [first character is a number]
return inet_addr(hostname);
}
}
bool NetworkConnect(const char *hostname, int port)
{
SOCKET s;
struct sockaddr_in sin;
int b;
DEBUG(net, 1) ("[NET][TCP] Connecting to %s %d", hostname, port);
s = socket(AF_INET, SOCK_STREAM, 0);
if (s == INVALID_SOCKET) error("socket() failed");
b = 1;
setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (const char*)&b, sizeof(b));
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = NetworkResolveHost(hostname);
sin.sin_port = htons(port);
if (connect(s, (struct sockaddr*) &sin, sizeof(sin)) != 0) {
NetworkClose(true);
return false;
}
// set nonblocking mode for socket..
{ unsigned long blocking = 1; ioctlsocket(s, FIONBIO, &blocking); }
// in client mode, only the first client field is used. it's pointing to the server.
AllocClient(s);
// queue packets.. because we're waiting for the savegame.
_networking_queuing = true;
_frame_counter_max = 0;
return true;
}
void NetworkListen()
{
SOCKET ls;
struct sockaddr_in sin;
int port;
port = _network_server_port;
DEBUG(net, 1) ("[NET][TCP] listening on port %d", port);
ls = socket(AF_INET, SOCK_STREAM, 0);
if (ls == INVALID_SOCKET)
error("socket() on listen socket failed");
// reuse the socket
{
int reuse = 1; if (setsockopt(ls, SOL_SOCKET, SO_REUSEADDR, (const char*)&reuse, sizeof(reuse)) == -1)
error("setsockopt() on listen socket failed");
}
// set nonblocking mode for socket
{ unsigned long blocking = 1; ioctlsocket(ls, FIONBIO, &blocking); }
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = 0;
sin.sin_port = htons(port);
if (bind(ls, (struct sockaddr*)&sin, sizeof(sin)) != 0)
error("bind() failed");
if (listen(ls, 1) != 0)
error("listen() failed");
_listensocket = ls;
}
void NetworkReceive()
{
ClientState *cs;
int n;
fd_set read_fd, write_fd;
struct timeval tv;
FD_ZERO(&read_fd);
FD_ZERO(&write_fd);
for(cs=_clients;cs->socket != INVALID_SOCKET; cs++) {
FD_SET(cs->socket, &read_fd);
FD_SET(cs->socket, &write_fd);
}
// take care of listener port
if (_networking_server) {
FD_SET(_listensocket, &read_fd);
}
tv.tv_sec = tv.tv_usec = 0; // don't block at all.
#if !defined(__MORPHOS__) && !defined(__AMIGA__)
n = select(FD_SETSIZE, &read_fd, &write_fd, NULL, &tv);
#else
n = WaitSelect(FD_SETSIZE, &read_fd, &write_fd, NULL, &tv, NULL);
#endif
if ((n == -1) && (!_networking_server)) NetworkHandleConnectionLost();
// accept clients..
if (_networking_server && FD_ISSET(_listensocket, &read_fd))
NetworkAcceptClients();
// read stuff from clients
for(cs=_clients;cs->socket != INVALID_SOCKET; cs++) {
cs->writable = !!FD_ISSET(cs->socket, &write_fd);
if (FD_ISSET(cs->socket, &read_fd)) {
if (!ReadPackets(cs))
cs--;
}
}
// if we're a server, and any client needs a snapshot, create a snapshot and send all commands from the server queue to the client.
if (_networking_server && _transmit_file == NULL) {
bool didsave = false;
for(cs=_clients;cs->socket != INVALID_SOCKET; cs++) {
if (cs->inactive) {
cs->inactive = false;
// found a client waiting for a snapshot. make a snapshot.
if (!didsave) {
char filename[256];
sprintf(filename, "%snetwork.tmp", _path.autosave_dir);
didsave = true;
if (SaveOrLoad(filename, SL_SAVE) != SL_OK) error("network savedump failed");
_transmit_file = ReadFileToMem(filename, &_transmit_file_size, 500000);
if (_transmit_file == NULL) error("network savedump failed to load");
}
// and start sending the file..
cs->xmitpos = 1;
// send queue of commands to client.
SendQueuedCommandsToNewClient(cs);
NetworkSendWelcome(cs, true);
}
}
}
}
void NetworkSend()
{
ClientState *cs;
void *free_xmit;
free_xmit = _transmit_file;
// send stuff to all clients
for(cs=_clients;cs->socket != INVALID_SOCKET; cs++) {
if (cs->xmitpos) {
if (cs->writable)
SendXmit(cs);
free_xmit = NULL;
}
if (cs->writable) {
if (!SendPackets(cs)) cs--;
}
}
// no clients left that xmit the file, free it.
if (free_xmit) {
_transmit_file = NULL;
free(free_xmit);
}
}
void NetworkInitialize()
{
ClientState *cs;
QueueClear(&_command_queue);
QueueClear(&_ack_queue);
_command_queue.last = &_command_queue.head;
_network_game_list = NULL;
// invalidate all clients
for(cs=_clients; cs != &_clients[MAX_CLIENTS]; cs++)
cs->socket = INVALID_SOCKET;
}
void NetworkClose(bool client)
{
ClientState *cs;
// invalidate all clients
for(cs=_clients; cs != &_clients[MAX_CLIENTS]; cs++) if (cs->socket != INVALID_SOCKET) {
CloseClient(cs);
}
if (!client) {
// if in servermode --> close listener
closesocket(_listensocket);
_listensocket= INVALID_SOCKET;
DEBUG(net, 1) ("[NET][TCP] closed listener on port %i", _network_server_port);
}
}
void NetworkShutdown()
{
_networking_server = false;
_networking = false;
_networking_sync = false;
_frame_counter = 0;
_frame_counter_max = 0;
_frame_counter_srv = 0;
}
// switch to synced mode.
void NetworkStartSync(bool fcreset)
{
DEBUG(net, 3) ("[NET][SYNC] switching to synced game mode");
_networking_sync = true;
_frame_counter = 0;
if (fcreset) {
_frame_counter_max = 0;
_frame_counter_srv = 0;
_frame_fsync_last = 0;
}
_num_future_seed = 0;
_sync_seed_1 = _sync_seed_2 = 0;
memset(_my_seed_list, 0, sizeof(_my_seed_list));
}
// ************************** //
// * UDP Network Extensions * //
// ************************** //
void NetworkUDPListen(bool client)
{
SOCKET udp;
struct sockaddr_in sin;
int port;
if (client) { port = _network_client_port; } else { port = _network_server_port; };
DEBUG(net, 1) ("[NET][UDP] listening on port %i", port);
udp = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
// this disables network
_network_available = !(udp == INVALID_SOCKET);
// set nonblocking mode for socket
{ unsigned long blocking = 1; ioctlsocket(udp, FIONBIO, &blocking); }
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = 0;
sin.sin_port = htons(port);
if (bind(udp, (struct sockaddr*)&sin, sizeof(sin)) != 0)
DEBUG(net, 1) ("[NET][UDP] error: bind failed on port %i", port);
// enable broadcasting
{ unsigned long val=1; setsockopt(udp, SOL_SOCKET, SO_BROADCAST, (char *) &val , sizeof(val)); }
// allow reusing
{ unsigned long val=1; setsockopt(udp, SOL_SOCKET, SO_REUSEADDR, (char *) &val , sizeof(val)); }
if (client) { _udp_client_socket = udp; } else { _udp_server_socket = udp; } ;
}
void NetworkUDPClose(bool client)
{
if (client) {
DEBUG(net, 1) ("[NET][UDP] closed listener on port %i", _network_client_port);
closesocket(_udp_client_socket);
_udp_client_socket = INVALID_SOCKET;
} else {
DEBUG(net, 1) ("[NET][UDP] closed listener on port %i", _network_server_port);
closesocket(_udp_server_socket);
_udp_server_socket = INVALID_SOCKET;
};
}
void NetworkUDPReceive(bool client)
{
struct sockaddr_in client_addr;
#ifndef __MORPHOS__
int client_len;
#else
LONG client_len; // for some reason we need a 'LONG' under MorphOS
#endif
int nbytes;
struct UDPPacket packet;
int packet_len;
SOCKET udp;
if (client) udp=_udp_client_socket; else udp=_udp_server_socket;
packet_len = sizeof(packet);
client_len = sizeof(client_addr);
nbytes = recvfrom(udp, (char *) &packet, packet_len , 0, (struct sockaddr *) &client_addr, &client_len);
if (nbytes>0) {
if (packet.command_code==packet.command_check) switch (packet.command_code) {
case NET_UDPCMD_SERVERSEARCH:
if (!client) {
packet.command_check=packet.command_code=NET_UDPCMD_SERVERINFO;
memcpy(&packet.data,&_network_game,sizeof(_network_game));
packet.data_len=sizeof(_network_game);
NetworkUDPSend(client,client_addr, packet);
}
break;
case NET_UDPCMD_GETSERVERINFO:
if (!client) {
packet.command_check=packet.command_code=NET_UDPCMD_SERVERINFO;
memcpy(&packet.data,&_network_game,sizeof(_network_game));
packet.data_len=sizeof(_network_game);
NetworkUDPSend(client,client_addr, packet);
}
break;
case NET_UDPCMD_SERVERINFO:
if (client) {
NetworkGameList * item;
item = (NetworkGameList *) NetworkGameListAdd();
item -> ip = inet_addr(inet_ntoa(client_addr.sin_addr));
item -> port = ntohs(client_addr.sin_port);
memcpy(item,&packet.data,packet.data_len);
}
break;
}
}
}
void NetworkUDPBroadCast(bool client, struct UDPPacket packet)
{
int i=0, res;
struct sockaddr_in out_addr;
uint32 bcaddr;
byte * bcptr;
SOCKET udp;
if (client) udp=_udp_client_socket; else udp=_udp_server_socket;
while (_network_ip_list[i]!=0) {
bcaddr=_network_ip_list[i];
out_addr.sin_family = AF_INET;
if (client) { out_addr.sin_port = htons(_network_server_port); } else { out_addr.sin_port = htons(_network_client_port); };
bcptr = (byte *) &bcaddr;
bcptr[3]=255;
out_addr.sin_addr.s_addr = bcaddr;
res=sendto(udp,(char *) &packet,sizeof(packet),0,(struct sockaddr *) &out_addr,sizeof(out_addr));
if (res==-1) DEBUG(net, 1)("udp: broadcast error: %i",GET_LAST_ERROR());
i++;
}
}
void NetworkUDPSend(bool client, struct sockaddr_in recv,struct UDPPacket packet)
{
SOCKET udp;
if (client) udp=_udp_client_socket; else udp=_udp_server_socket;
sendto(udp,(char *) &packet,sizeof(packet),0,(struct sockaddr *) &recv,sizeof(recv));
}
bool NetworkUDPSearchGame(const byte ** _network_detected_serverip, unsigned short * _network_detected_serverport)
{
struct UDPPacket packet;
int timeout=3000;
NetworkGameListClear();
DEBUG(net, 0) ("[NET][UDP] searching server");
*_network_detected_serverip = "255.255.255.255";
*_network_detected_serverport = 0;
packet.command_check=packet.command_code=NET_UDPCMD_SERVERSEARCH;
packet.data_len=0;
NetworkUDPBroadCast(true, packet);
while (timeout>=0) {
CSleep(100);
timeout-=100;
NetworkUDPReceive(true);
if (_network_game_count>0) {
NetworkGameList * item;
item = (NetworkGameList *) NetworkGameListItem(0);
*_network_detected_serverip=inet_ntoa(*(struct in_addr *) &item->ip);
*_network_detected_serverport=item->port;
timeout=-1;
DEBUG(net, 0) ("[NET][UDP] server found on %s", *_network_detected_serverip);
}
}
return (*_network_detected_serverport>0);
}
// *************************** //
// * New Network Core System * //
// *************************** //
void NetworkIPListInit()
{
struct hostent* he = NULL;
char hostname[250];
uint32 bcaddr;
int i=0;
gethostname(hostname,250);
DEBUG(net, 2) ("[NET][IP] init for host %s", hostname);
he=gethostbyname((char *) hostname);
if (he == NULL) {
he = gethostbyname("localhost");
}
if (he == NULL) {
bcaddr = inet_addr("127.0.0.1");
he = gethostbyaddr(inet_ntoa(*(struct in_addr *) &bcaddr), sizeof(bcaddr), AF_INET);
}
if (he == NULL) {
DEBUG(net, 2) ("[NET][IP] cannot resolve %s", hostname);
} else {
while(he->h_addr_list[i]) {
bcaddr = inet_addr(inet_ntoa(*(struct in_addr *) he->h_addr_list[i]));
_network_ip_list[i]=bcaddr;
DEBUG(net, 2) ("[NET][IP] add %s",inet_ntoa(*(struct in_addr *) he->h_addr_list[i]));
i++;
}
}
_network_ip_list[i]=0;
}
/* *************************************************** */
void NetworkCoreInit()
{
DEBUG(net, 3) ("[NET][Core] init()");
_network_available = true;
_network_client_timeout = 300;
_network_ready_ahead = 1;
// [win32] winsock startup
#if defined(WIN32)
{
WSADATA wsa;
DEBUG(net, 3) ("[NET][Core] using windows socket library");
if (WSAStartup(MAKEWORD(2,0), &wsa) != 0) {
DEBUG(net, 3) ("[NET][Core] error: WSAStartup failed");
_network_available=false;
}
}
#else
// [morphos/amigaos] bsd-socket startup
#if defined(__MORPHOS__) || defined(__AMIGA__)
{
DEBUG(misc,3) ("[NET][Core] using bsd socket library");
if (!(SocketBase = OpenLibrary("bsdsocket.library", 4))) {
DEBUG(net, 3) ("[NET][Core] Couldn't open bsdsocket.library version 4.");
_network_available=false;
}
#if !defined(__MORPHOS__)
// for usleep() implementation (only required for legacy AmigaOS builds)
if ( (TimerPort = CreateMsgPort()) ) {
if ( (TimerRequest = (struct timerequest *) CreateIORequest(TimerPort, sizeof(struct timerequest))) ) {
if ( OpenDevice("timer.device", UNIT_MICROHZ, (struct IORequest *) TimerRequest, 0) == 0 ) {
if ( !(TimerBase = TimerRequest->tr_node.io_Device) ) {
// free ressources...
DEBUG(net, 3) ("[NET][Core] Couldn't initialize timer.");
_network_available=false;
}
}
}
}
#endif
}
#else
// [linux/macos] unix-socket startup
DEBUG(net, 3) ("[NET][Core] using unix socket library");
#endif
#endif
if (_network_available) {
DEBUG(net, 3) ("[NET][Core] OK: multiplayer available");
// initiate network ip list
NetworkIPListInit();
} else
DEBUG(net, 3) ("[NET][Core] FAILED: multiplayer not available");
}
/* *************************************************** */
void NetworkCoreShutdown()
{
DEBUG(net, 3) ("[NET][Core] shutdown()");
#if defined(__MORPHOS__) || defined(__AMIGA__)
{
// free allocated ressources
#if !defined(__MORPHOS__)
if (TimerBase) { CloseDevice((struct IORequest *) TimerRequest); }
if (TimerRequest) { DeleteIORequest(TimerRequest); }
if (TimerPort) { DeleteMsgPort(TimerPort); }
#endif
if (SocketBase) {
CloseLibrary(SocketBase);
}
}
#endif
#if defined(WIN32)
{ WSACleanup();}
#endif
}
/* *************************************************** */
void ParseConnectionString(const byte **player, const byte **port, byte *connection_string)
{
byte c = 0;
while (connection_string[c] != '\0') {
if (connection_string[c] == '#') {
*player = &connection_string[c+1];
connection_string[c] = '\0';
}
if (connection_string[c] == ':') {
*port = &connection_string[c+1];
connection_string[c] = '\0';
}
c++;
}
}
bool NetworkCoreConnectGame(const byte* b, unsigned short port)
{
if (!_network_available) return false;
if (strcmp(b,"auto")==0) {
// do autodetect
NetworkUDPSearchGame(&b, &port);
}
if (port==0) {
// autodetection failed
if (_networking_override) NetworkLobbyShutdown();
ShowErrorMessage(-1, STR_NETWORK_ERR_NOSERVER, 0, 0);
_switch_mode_errorstr = STR_NETWORK_ERR_NOSERVER;
return false;
}
NetworkInitialize();
_networking = NetworkConnect(b, port);
if (_networking) {
NetworkLobbyShutdown();
IConsoleCmdExec("exec scripts/on_client.scr 0");
} else {
if (_networking_override)
NetworkLobbyShutdown();
ShowErrorMessage(-1, STR_NETWORK_ERR_NOCONNECTION,0,0);
_switch_mode_errorstr = STR_NETWORK_ERR_NOCONNECTION;
}
return _networking;
}
/* *************************************************** */
bool NetworkCoreConnectGameStruct(NetworkGameList * item)
{
return NetworkCoreConnectGame(inet_ntoa(*(struct in_addr *) &item->ip),item->port);
}
/* *************************************************** */
bool NetworkCoreStartGame()
{
if (!_network_available) return false;
NetworkLobbyShutdown();
NetworkInitialize();
NetworkListen();
NetworkUDPListen(false);
_networking_server = true;
_networking = true;
NetworkGameFillDefaults(); // clears the network game info
_network_game.players_on++; // the serverplayer is online
// execute server initialization script
IConsoleCmdExec("exec scripts/on_server.scr 0");
return true;
}
/* *************************************************** */
void NetworkCoreDisconnect()
{
/* terminate server */
if (_networking_server) {
NetworkUDPClose(false);
NetworkClose(false);
}
/* terminate client connection */
else if (_networking) {
NetworkClose(true);
}
NetworkShutdown();
}
/* *************************************************** */
void NetworkCoreLoop(bool incomming)
{
if (incomming) {
// incomming
if ( _udp_client_socket != INVALID_SOCKET ) NetworkUDPReceive(true);
if ( _udp_server_socket != INVALID_SOCKET ) NetworkUDPReceive(false);
if (_networking)
NetworkReceive();
} else {
if ( _udp_client_socket != INVALID_SOCKET ) NetworkUDPReceive(true);
if ( _udp_server_socket != INVALID_SOCKET ) NetworkUDPReceive(false);
if (_networking)
NetworkSend();
}
}
void NetworkLobbyInit()
{
DEBUG(net, 3) ("[NET][Lobby] init()");
NetworkUDPListen(true);
}
void NetworkLobbyShutdown()
{
DEBUG(net, 3) ("[NET][Lobby] shutdown()");
NetworkUDPClose(true);
}
// ******************************** //
// * Network Game List Extensions * //
// ******************************** //
void NetworkGameListClear()
{
NetworkGameList * item;
NetworkGameList * next;
DEBUG(net, 4) ("[NET][G-List] cleared server list");
item = _network_game_list;
while (item != NULL) {
next = (NetworkGameList *) item -> _next;
free (item);
item = next;
}
_network_game_list=NULL;
_network_game_count=0;
}
NetworkGameList * NetworkGameListAdd()
{
NetworkGameList * item;
NetworkGameList * before;
DEBUG(net, 4) ("[NET][G-List] added server to list");
item = _network_game_list;
before = item;
while (item != NULL) {
before = item;
item = (NetworkGameList *) item -> _next;
}
item = malloc(sizeof(NetworkGameList));
item -> _next = NULL;
if (before == NULL) {
_network_game_list = item;
} else
before -> _next = item;
_network_game_count++;
return item;
}
void NetworkGameListFromLAN()
{
struct UDPPacket packet;
DEBUG(net, 2) ("[NET][G-List] searching server over lan");
NetworkGameListClear();
packet.command_check=packet.command_code=NET_UDPCMD_SERVERSEARCH;
packet.data_len=0;
NetworkUDPBroadCast(true,packet);
}
void NetworkGameListFromInternet()
{
DEBUG(net, 2) ("[NET][G-List] searching servers over internet");
NetworkGameListClear();
// **TODO** masterserver communication [internet protocol list]
}
NetworkGameList * NetworkGameListItem(uint16 index)
{
NetworkGameList * item;
NetworkGameList * next;
uint16 cnt = 0;
item = _network_game_list;
while ((item != NULL) && (cnt != index)) {
next = (NetworkGameList *) item -> _next;
item = next;
cnt++;
}
return item;
}
// *************************** //
// * Network Game Extensions * //
// *************************** //
void NetworkGameFillDefaults()
{
NetworkGameInfo * game = &_network_game;
#if defined(WITH_REV)
extern char _openttd_revision[];
#else
const char _openttd_revision[] = "norev000";
#endif
DEBUG(net, 4) ("[NET][G-Info] setting defaults");
ttd_strlcpy(game->server_name, "OpenTTD Game", sizeof(game->server_name));
game->game_password[0]='\0';
game->map_name[0]='\0';
ttd_strlcpy(game->server_revision, _openttd_revision, sizeof(game->server_revision));
game->game_date=0;
game->map_height=0;
game->map_width=0;
game->map_set=0;
game->players_max=8;
game->players_on=0;
game->server_lang=_dynlang.curr;
}
void NetworkGameChangeDate(uint16 newdate)
{
if (_networking_server)
_network_game.game_date = newdate;
}
#else // not ENABLE_NETWORK
// stubs
void NetworkInitialize() {}
void NetworkShutdown() {}
void NetworkListen() {}
void NetworkConnect(const char *hostname, int port) {}
void NetworkReceive() {}
void NetworkSend() {}
void NetworkSendCommand(TileIndex tile, uint32 p1, uint32 p2, uint32 cmd, CommandCallback *callback) {}
void NetworkSendEvent(uint16 type, uint16 data_len, void * data) {};
void NetworkProcessCommands() {}
void NetworkStartSync(bool fcreset) {}
void NetworkSendReadyPacket() {}
void NetworkSendSyncPackets() {}
void NetworkSendFrameSyncPackets() {}
bool NetworkCheckClientReady() { return true; }
void NetworkCoreInit() { _network_available=false; };
void NetworkCoreShutdown() {};
void NetworkCoreDisconnect() {};
void NetworkCoreLoop(bool incomming) {};
void ParseConnectionString(const byte **player, const byte **port, byte *connection_string) {};
bool NetworkCoreConnectGame(const byte* b, unsigned short port) {return false;};
bool NetworkCoreStartGame() {return false;};
void NetworkLobbyShutdown() {};
void NetworkLobbyInit() {};
void NetworkGameListClear() {};
NetworkGameList * NetworkGameListAdd() {return NULL;};
void NetworkGameListFromLAN() {};
void NetworkGameListFromInternet() {};
void NetworkGameFillDefaults() {};
NetworkGameList * NetworkGameListItem(uint16 index) {return NULL;};
bool NetworkCoreConnectGameStruct(NetworkGameList * item) {return false;};
void NetworkGameChangeDate(uint16 newdate) {};
#endif
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