-/***********************************************************
-* Rocks'n'Diamonds -- McDuffin Strikes Back! *
-*----------------------------------------------------------*
-* (c) 1995-98 Artsoft Entertainment *
-* Holger Schemel *
-* Oststrasse 11a *
-* 33604 Bielefeld *
-* phone: ++49 +521 290471 *
-* email: aeglos@valinor.owl.de *
-*----------------------------------------------------------*
-* network.c *
-***********************************************************/
-
-#if !defined(MSDOS) && !defined(WIN32)
+// ============================================================================
+// Rocks'n'Diamonds - McDuffin Strikes Back!
+// ----------------------------------------------------------------------------
+// (c) 1995-2014 by Artsoft Entertainment
+// Holger Schemel
+// info@artsoft.org
+// http://www.artsoft.org/
+// ----------------------------------------------------------------------------
+// netserv.c
+// ============================================================================
#include <fcntl.h>
#include <sys/time.h>
#include <signal.h>
-#include <sys/socket.h>
#include <errno.h>
-#include <string.h>
-#include <netinet/in.h>
-#include <netinet/tcp.h>
-#include <arpa/inet.h>
-#include <netdb.h>
+
+#include "libgame/libgame.h"
#include "netserv.h"
-#include "misc.h"
+#include "main.h"
+
-static int clients = 0;
-static int onceonly = 0;
+static int num_clients = 0;
+static boolean run_server_only_once = FALSE;
struct NetworkServerPlayerInfo
{
- int fd;
- char player_name[16];
- unsigned char number;
- struct NetworkServerPlayerInfo *next;
- char active;
- char introduced;
- unsigned char readbuffer[MAX_BUFFER_SIZE];
- unsigned char writbuffer[MAX_BUFFER_SIZE];
- int nread, nwrite;
+ TCPsocket fd;
+ char player_name[MAX_PLAYER_NAME_LEN + 1];
+ int number;
+ boolean active;
+ boolean introduced;
byte action;
boolean action_received;
+
+ struct NetworkServerPlayerInfo *next;
};
static struct NetworkServerPlayerInfo *first_player = NULL;
#define NEXT(player) ((player)->next ? (player)->next : first_player)
-static struct sockaddr_in saddr;
-static int lfd;
-static unsigned char realbuffer[512], *buffer = realbuffer + 4;
+// TODO: peer address
+static TCPsocket lfd; // listening TCP socket
+static UDPsocket udp; // listening UDP socket
+static SDLNet_SocketSet fds; // socket set
+
+static struct NetworkBuffer *read_buffer = NULL;
+static struct NetworkBuffer *write_buffer = NULL;
+
+static unsigned int ServerFrameCounter = 0;
+
+
+int getNetwork8BitInteger(byte *ptr)
+{
+ return ptr[0];
+}
+
+int putNetwork8BitInteger(byte *ptr, int value)
+{
+ ptr[0] = value;
+
+ return 1;
+}
+
+int getNetwork16BitInteger(byte *ptr)
+{
+ return ((ptr[0] << 8) |
+ (ptr[1] << 0));
+}
+
+int putNetwork16BitInteger(byte *ptr, int value)
+{
+ ptr[0] = (value >> 8) & 0xff;
+ ptr[1] = (value >> 0) & 0xff;
+
+ return 2;
+}
+
+int getNetwork32BitInteger(byte *ptr)
+{
+ return ((ptr[0] << 24) |
+ (ptr[1] << 16) |
+ (ptr[2] << 8) |
+ (ptr[3] << 0));
+}
+
+int putNetwork32BitInteger(byte *ptr, int value)
+{
+ ptr[0] = (value >> 24) & 0xff;
+ ptr[1] = (value >> 16) & 0xff;
+ ptr[2] = (value >> 8) & 0xff;
+ ptr[3] = (value >> 0) & 0xff;
+
+ return 4;
+}
+
+char *getNetworkString(byte *ptr)
+{
+ return (char *)ptr;
+}
+
+int putNetworkString(byte *ptr, char *s)
+{
+ strcpy((char *)ptr, s);
+
+ return strlen(s) + 1;
+}
+
+struct NetworkBuffer *newNetworkBuffer(void)
+{
+ struct NetworkBuffer *new = checked_calloc(sizeof(struct NetworkBuffer));
+
+ new->max_size = MAX_BUFFER_SIZE;
+ new->size = 0;
+ new->pos = 0;
+
+ new->buffer = checked_calloc(new->max_size);
+
+ return new;
+}
+
+static void resetNetworkBufferForReading(struct NetworkBuffer *nb)
+{
+ nb->pos = 0;
+}
+
+static void resetNetworkBufferForWriting(struct NetworkBuffer *nb)
+{
+ nb->size = 0;
+ nb->pos = 0;
+}
+
+void initNetworkBufferForReceiving(struct NetworkBuffer *nb)
+{
+ resetNetworkBufferForWriting(nb);
+}
+
+void initNetworkBufferForReading(struct NetworkBuffer *nb)
+{
+ resetNetworkBufferForReading(nb);
+
+ // skip message length header
+ getNetworkBuffer32BitInteger(nb);
+}
+
+void initNetworkBufferForWriting(struct NetworkBuffer *nb, int message_type,
+ int player_nr)
+{
+ resetNetworkBufferForWriting(nb);
+
+ // will be replaced with message length before sending
+ putNetworkBuffer32BitInteger(nb, 0);
+
+ putNetworkBuffer8BitInteger(nb, message_type);
+ putNetworkBuffer8BitInteger(nb, player_nr);
+}
+
+static void copyNetworkBufferForWriting(struct NetworkBuffer *nb_from,
+ struct NetworkBuffer *nb_to,
+ int player_nr)
+{
+ initNetworkBufferForReading(nb_from);
+
+ int message_type = getNetworkBuffer8BitInteger(nb_from);
+
+ // skip player number
+ getNetworkBuffer8BitInteger(nb_from);
+
+ initNetworkBufferForWriting(nb_to, message_type, player_nr);
+
+ while (nb_from->pos < nb_from->size)
+ {
+ int b = getNetworkBuffer8BitInteger(nb_from);
+
+ putNetworkBuffer8BitInteger(nb_to, b);
+ }
+}
+
+static void increaseNetworkBuffer(struct NetworkBuffer *nb, int additional_size)
+{
+ // add some more buffer size than is really required this time
+ nb->max_size += additional_size + MAX_BUFFER_SIZE;
+ nb->buffer = checked_realloc(nb->buffer, nb->max_size);
+}
+
+int receiveNetworkBufferBytes(struct NetworkBuffer *nb, TCPsocket socket,
+ int num_bytes)
+{
+ if (num_bytes > MAX_PACKET_SIZE)
+ {
+ Error(ERR_NETWORK_SERVER, "protocol error: invalid packet size %d",
+ num_bytes);
+
+ return -1;
+ }
+
+ if (nb->pos + num_bytes > nb->max_size)
+ increaseNetworkBuffer(nb, num_bytes);
+
+ int result = SDLNet_TCP_Recv(socket, &nb->buffer[nb->pos], num_bytes);
+
+ if (result != num_bytes)
+ return result;
+
+ nb->pos += num_bytes;
+ nb->size = nb->pos;
+
+ return num_bytes;
+}
+
+int receiveNetworkBufferPacket(struct NetworkBuffer *nb, TCPsocket socket)
+{
+ int num_bytes, num_bytes_head, num_bytes_body;
+
+ num_bytes_head = 4;
+ num_bytes = receiveNetworkBufferBytes(nb, socket, num_bytes_head);
+
+ if (num_bytes != num_bytes_head)
+ return num_bytes;
+
+ num_bytes_body = getNetwork32BitInteger(nb->buffer);
+ num_bytes = receiveNetworkBufferBytes(nb, socket, num_bytes_body);
+
+ return num_bytes;
+}
+
+int getNetworkBuffer8BitInteger(struct NetworkBuffer *nb)
+{
+ int num_bytes = 1;
+
+ if (nb->pos + num_bytes > nb->size)
+ return 0;
+
+ int value = getNetwork8BitInteger(&nb->buffer[nb->pos]);
+
+ nb->pos += num_bytes;
+
+ return value;
+}
+
+void putNetworkBuffer8BitInteger(struct NetworkBuffer *nb, int value)
+{
+ int num_bytes = 1;
+
+ if (nb->pos + num_bytes > nb->max_size)
+ increaseNetworkBuffer(nb, num_bytes);
+
+ nb->pos += putNetwork8BitInteger(&nb->buffer[nb->pos], value);
+ nb->size = nb->pos;
+}
+
+int getNetworkBuffer16BitInteger(struct NetworkBuffer *nb)
+{
+ int num_bytes = 2;
+
+ if (nb->pos + num_bytes > nb->size)
+ return 0;
+
+ int value = getNetwork16BitInteger(&nb->buffer[nb->pos]);
+
+ nb->pos += num_bytes;
+
+ return value;
+}
+
+void putNetworkBuffer16BitInteger(struct NetworkBuffer *nb, int value)
+{
+ int num_bytes = 2;
+
+ if (nb->pos + num_bytes > nb->max_size)
+ increaseNetworkBuffer(nb, num_bytes);
+
+ nb->pos += putNetwork16BitInteger(&nb->buffer[nb->pos], value);
+ nb->size = nb->pos;
+}
+
+int getNetworkBuffer32BitInteger(struct NetworkBuffer *nb)
+{
+ int num_bytes = 4;
+
+ if (nb->pos + num_bytes > nb->size)
+ return 0;
+
+ int value = getNetwork32BitInteger(&nb->buffer[nb->pos]);
+
+ nb->pos += num_bytes;
+
+ return value;
+}
+
+void putNetworkBuffer32BitInteger(struct NetworkBuffer *nb, int value)
+{
+ int num_bytes = 4;
+
+ if (nb->pos + num_bytes > nb->max_size)
+ increaseNetworkBuffer(nb, num_bytes);
+
+ nb->pos += putNetwork32BitInteger(&nb->buffer[nb->pos], value);
+ nb->size = nb->pos;
+}
-static int interrupt;
-static int tcp = -1;
+char *getNetworkBufferString(struct NetworkBuffer *nb)
+{
+ char *s = getNetworkString(&nb->buffer[nb->pos]);
-static unsigned long ServerFrameCounter = 0;
+ nb->pos += strlen(s) + 1;
-static fd_set fds;
+ return s;
+}
-static void addtobuffer(struct NetworkServerPlayerInfo *player,
- unsigned char *b, int len)
+void putNetworkBufferString(struct NetworkBuffer *nb, char *s)
{
- if (player->nwrite + len >= MAX_BUFFER_SIZE)
- Error(ERR_EXIT_NETWORK_SERVER,
- "internal error: network send buffer overflow");
+ int num_bytes = strlen(s) + 1;
+
+ if (nb->pos + num_bytes > nb->max_size)
+ increaseNetworkBuffer(nb, num_bytes);
- memcpy(player->writbuffer + player->nwrite, b, len);
- player->nwrite += len;
+ nb->pos += putNetworkString(&nb->buffer[nb->pos], s);
+ nb->size = nb->pos;
}
-static void flushuser(struct NetworkServerPlayerInfo *player)
+int getNetworkBufferFile(struct NetworkBuffer *nb, char *filename)
{
- if (player->nwrite)
+ FILE *file;
+ int num_bytes = getNetworkBuffer32BitInteger(nb);
+ int i;
+
+ if (!(file = fopen(filename, MODE_WRITE)))
{
- write(player->fd, player->writbuffer, player->nwrite);
- player->nwrite = 0;
+ Error(ERR_WARN, "cannot write file '%s' from network buffer", filename);
+
+ return 0;
+ }
+
+ for (i = 0; i < num_bytes; i++)
+ {
+ int b = getNetworkBuffer8BitInteger(nb);
+
+ putFile8Bit(file, b);
}
+
+ fclose(file);
+
+ return num_bytes;
}
-static void broadcast(struct NetworkServerPlayerInfo *except,
- int len, int activeonly)
+int putNetworkBufferFile(struct NetworkBuffer *nb, char *filename)
+{
+ File *file;
+ int filesize_pos = nb->pos;
+ int num_bytes = 0;
+
+ // will be replaced with file size
+ putNetworkBuffer32BitInteger(nb, 0);
+
+ if (!(file = openFile(filename, MODE_READ)))
+ {
+ Error(ERR_WARN, "cannot read file '%s' to network buffer", filename);
+
+ return 0;
+ }
+
+ while (1)
+ {
+ int b = getFile8Bit(file);
+
+ if (checkEndOfFile(file))
+ break;
+
+ putNetworkBuffer8BitInteger(nb, b);
+
+ num_bytes++;
+ }
+
+ closeFile(file);
+
+ // set file size
+ putNetwork32BitInteger(&nb->buffer[filesize_pos], num_bytes);
+
+ return num_bytes;
+}
+
+void dumpNetworkBuffer(struct NetworkBuffer *nb)
+{
+ int i;
+
+ printf("::: network buffer maximum size: %d\n", nb->max_size);
+ printf("::: network buffer size: %d\n", nb->size);
+ printf("::: network buffer position : %d\n", nb->pos);
+
+ for (i = 0; i < nb->size; i++)
+ {
+ if ((i % 16) == 0)
+ printf("\n::: ");
+
+ printf("%02x ", nb->buffer[i]);
+ }
+
+ printf("\n");
+}
+
+static void SendNetworkBufferToAllButOne(struct NetworkBuffer *nb,
+ struct NetworkServerPlayerInfo *except)
{
struct NetworkServerPlayerInfo *player;
- realbuffer[0] = realbuffer[1] = realbuffer[2] = 0;
- realbuffer[3] = (unsigned char)len;
- for (player=first_player; player; player=player->next)
- if (player != except && (player->active || !activeonly) && player->introduced)
- addtobuffer(player, realbuffer, 4 + len);
+ // set message length header
+ putNetwork32BitInteger(nb->buffer, nb->size - 4);
+
+ for (player = first_player; player != NULL; player = player->next)
+ {
+ if (player != except && player->introduced)
+ {
+ // directly send the buffer to the network client
+ SDLNet_TCP_Send(player->fd, nb->buffer, nb->size);
+ }
+ }
+}
+
+static void SendNetworkBufferToAll(struct NetworkBuffer *nb)
+{
+ SendNetworkBufferToAllButOne(nb, NULL);
}
-static void sendtoone(struct NetworkServerPlayerInfo *to, int len)
+static void SendNetworkBufferToClient(struct NetworkBuffer *nb,
+ struct NetworkServerPlayerInfo *player)
{
- realbuffer[0] = realbuffer[1] = realbuffer[2] = 0;
- realbuffer[3] = (unsigned char)len;
- addtobuffer(to, realbuffer, 4 + len);
+ // set message length header
+ putNetwork32BitInteger(nb->buffer, nb->size - 4);
+
+ // directly send the buffer to the network client
+ SDLNet_TCP_Send(player->fd, nb->buffer, nb->size);
}
static void RemovePlayer(struct NetworkServerPlayerInfo *player)
{
- struct NetworkServerPlayerInfo *v;
-
if (options.verbose)
Error(ERR_NETWORK_SERVER, "dropping client %d (%s)",
player->number, player->player_name);
+ SDLNet_TCP_DelSocket(fds, player->fd);
+ SDLNet_TCP_Close(player->fd);
+
if (player == first_player)
+ {
first_player = player->next;
+ }
else
{
- for (v=first_player; v; v=v->next)
+ struct NetworkServerPlayerInfo *p;
+
+ for (p = first_player; p != NULL; p = p->next)
{
- if (v->next && v->next == player)
+ if (p->next && p->next == player)
{
- v->next = player->next;
+ p->next = player->next;
+
break;
}
}
}
- close(player->fd);
if (player->introduced)
{
- buffer[0] = player->number;
- buffer[1] = OP_PLAYER_DISCONNECTED;
- broadcast(player, 2, 0);
+ initNetworkBufferForWriting(write_buffer, OP_PLAYER_DISCONNECTED,
+ player->number);
+
+ SendNetworkBufferToAllButOne(write_buffer, player);
}
free(player);
- clients--;
+ num_clients--;
- if (onceonly && clients == 0)
+#if 0 // do not terminate network server if last player disconnected
+ if (run_server_only_once && num_clients == 0)
{
if (options.verbose)
{
Error(ERR_NETWORK_SERVER, "no clients left");
Error(ERR_NETWORK_SERVER, "aborting");
}
+
exit(0);
}
+#endif
}
-static void AddPlayer(int fd)
+static void AddPlayer(TCPsocket fd)
{
- struct NetworkServerPlayerInfo *player, *v;
- unsigned char nxn;
+ struct NetworkServerPlayerInfo *player, *p;
+ int number = 1;
+ boolean again = TRUE;
- player = checked_malloc(sizeof (struct NetworkServerPlayerInfo));
+ SDLNet_TCP_AddSocket(fds, fd);
+
+ player = checked_calloc(sizeof(struct NetworkServerPlayerInfo));
player->fd = fd;
player->player_name[0] = 0;
- player->next = first_player;
- player->active = 0;
- player->nread = 0;
- player->nwrite = 0;
- player->introduced = 0;
+ player->active = FALSE;
+ player->introduced = FALSE;
player->action = 0;
player->action_received = FALSE;
+ player->next = first_player;
first_player = player;
- nxn = 1;
-
- again:
- v = player->next;
- while(v)
+ while (again)
{
- if (v->number == nxn)
+ again = FALSE;
+ p = player->next;
+
+ while (p)
{
- nxn++;
- goto again;
+ if (p->number == number)
+ {
+ number++;
+
+ again = TRUE;
+
+ break;
+ }
+
+ p = p->next;
}
- v = v->next;
}
- player->number = nxn;
- if (options.verbose)
- Error(ERR_NETWORK_SERVER, "client %d connecting from %s",
- nxn, inet_ntoa(saddr.sin_addr));
- clients++;
+ player->number = number;
+ num_clients++;
+
+ initNetworkBufferForWriting(write_buffer, OP_YOUR_NUMBER, 0);
+
+ putNetworkBuffer8BitInteger(write_buffer, player->number);
- buffer[0] = 0;
- buffer[1] = OP_YOUR_NUMBER;
- buffer[2] = player->number;
- sendtoone(player, 3);
+ SendNetworkBufferToClient(write_buffer, player);
}
-static void Handle_OP_PROTOCOL_VERSION(struct NetworkServerPlayerInfo *player,
- unsigned int len)
+static void Handle_OP_PROTOCOL_VERSION(struct NetworkServerPlayerInfo *player)
{
- if (len != 5 ||
- buffer[2] != PROTOCOL_VERSION_1 ||
- buffer[3] != PROTOCOL_VERSION_2)
+ int protocol_version_major = getNetworkBuffer8BitInteger(read_buffer);
+ int protocol_version_minor = getNetworkBuffer8BitInteger(read_buffer);
+ int protocol_version_patch = getNetworkBuffer8BitInteger(read_buffer);
+
+ if (protocol_version_major != PROTOCOL_VERSION_MAJOR ||
+ protocol_version_minor != PROTOCOL_VERSION_MINOR)
{
if (options.verbose)
Error(ERR_NETWORK_SERVER,
"client %d (%s) has wrong protocol version %d.%d.%d",
- player->number, player->player_name, buffer[2], buffer[3], buffer[4]);
+ player->number, player->player_name,
+ protocol_version_major,
+ protocol_version_minor,
+ protocol_version_patch);
+
+ initNetworkBufferForWriting(write_buffer, OP_BAD_PROTOCOL_VERSION, 0);
- buffer[0] = 0;
- buffer[1] = OP_BAD_PROTOCOL_VERSION;
- buffer[2] = PROTOCOL_VERSION_1;
- buffer[3] = PROTOCOL_VERSION_2;
- buffer[4] = PROTOCOL_VERSION_3;
- sendtoone(player, 5);
- flushuser(player);
+ putNetworkBuffer8BitInteger(write_buffer, PROTOCOL_VERSION_MAJOR);
+ putNetworkBuffer8BitInteger(write_buffer, PROTOCOL_VERSION_MINOR);
+ putNetworkBuffer8BitInteger(write_buffer, PROTOCOL_VERSION_PATCH);
+
+ SendNetworkBufferToClient(write_buffer, player);
RemovePlayer(player);
- interrupt = 1;
}
else
{
if (options.verbose)
Error(ERR_NETWORK_SERVER,
"client %d (%s) uses protocol version %d.%d.%d",
- player->number, player->player_name, buffer[2], buffer[3], buffer[4]);
+ player->number, player->player_name,
+ protocol_version_major,
+ protocol_version_minor,
+ protocol_version_patch);
}
}
static void Handle_OP_NUMBER_WANTED(struct NetworkServerPlayerInfo *player)
{
- struct NetworkServerPlayerInfo *v;
+ int nr_wanted = getNetworkBuffer8BitInteger(read_buffer);
int client_nr = player->number;
- int nr_wanted = buffer[2];
- int nr_is_free = 1;
+ boolean nr_is_free = TRUE;
+ struct NetworkServerPlayerInfo *p;
if (options.verbose)
Error(ERR_NETWORK_SERVER, "client %d (%s) wants to switch to # %d",
player->number, player->player_name, nr_wanted);
- for (v=first_player; v; v=v->next)
+ for (p = first_player; p != NULL; p = p->next)
{
- if (v->number == nr_wanted)
+ if (p->number == nr_wanted)
{
- nr_is_free = 0;
+ nr_is_free = FALSE;
+
break;
}
}
Error(ERR_NETWORK_SERVER, "client %d (%s) switches to # %d",
player->number, player->player_name, nr_wanted);
else if (player->number == nr_wanted)
- Error(ERR_NETWORK_SERVER, "client %d (%s) still has # %d",
+ Error(ERR_NETWORK_SERVER, "client %d (%s) already has # %d",
player->number, player->player_name, nr_wanted);
else
Error(ERR_NETWORK_SERVER,
- "client %d (%s) cannot switch (client %d still exists)",
+ "client %d (%s) cannot switch (client %d already exists)",
player->number, player->player_name, nr_wanted);
}
if (nr_is_free)
player->number = nr_wanted;
- buffer[0] = client_nr;
- buffer[1] = OP_NUMBER_WANTED;
- buffer[2] = nr_wanted;
- buffer[3] = player->number;
+ initNetworkBufferForWriting(write_buffer, OP_NUMBER_WANTED, client_nr);
- /*
- sendtoone(player, 4);
- */
+ putNetworkBuffer8BitInteger(write_buffer, nr_wanted);
+ putNetworkBuffer8BitInteger(write_buffer, player->number);
- broadcast(NULL, 4, 0);
+ SendNetworkBufferToAll(write_buffer);
}
-static void Handle_OP_PLAYER_NAME(struct NetworkServerPlayerInfo *player,
- unsigned int len)
+static void Handle_OP_PLAYER_NAME(struct NetworkServerPlayerInfo *player)
{
- struct NetworkServerPlayerInfo *v;
+ char *player_name = getNetworkBufferString(read_buffer);
int i;
- if (len>16)
- len=16;
- memcpy(player->player_name, &buffer[2], len-2);
- player->player_name[len-2] = 0;
- for (i=0; i<len-2; i++)
+ strncpy(player->player_name, player_name, MAX_PLAYER_NAME_LEN);
+ player->player_name[MAX_PLAYER_NAME_LEN] = '\0';
+
+ for (i = 0; i < MAX_PLAYER_NAME_LEN; i++)
{
- if (player->player_name[i] < ' ' ||
+ if (player->player_name[i] < ' ' ||
((unsigned char)(player->player_name[i]) > 0x7e &&
(unsigned char)(player->player_name[i]) <= 0xa0))
{
player->player_name[i] = 0;
+
break;
}
}
if (!player->introduced)
{
- buffer[0] = player->number;
- buffer[1] = OP_PLAYER_CONNECTED;
- broadcast(player, 2, 0);
+ initNetworkBufferForWriting(write_buffer, OP_PLAYER_CONNECTED,
+ player->number);
+
+ SendNetworkBufferToAllButOne(write_buffer, player);
}
if (options.verbose)
Error(ERR_NETWORK_SERVER, "client %d calls itself \"%s\"",
player->number, player->player_name);
- buffer[1] = OP_PLAYER_NAME;
- broadcast(player, len, 0);
+
+ copyNetworkBufferForWriting(read_buffer, write_buffer, player->number);
+
+ SendNetworkBufferToAllButOne(write_buffer, player);
if (!player->introduced)
{
- for (v=first_player; v; v=v->next)
+ struct NetworkServerPlayerInfo *p;
+
+ for (p = first_player; p != NULL; p = p->next)
{
- if (v != player && v->introduced)
+ if (p != player && p->introduced)
{
- buffer[0] = v->number;
- buffer[1] = OP_PLAYER_CONNECTED;
- sendtoone(player, 2);
- buffer[1] = OP_PLAYER_NAME;
- memcpy(&buffer[2], v->player_name, 14);
- sendtoone(player, 2+strlen(v->player_name));
+ initNetworkBufferForWriting(write_buffer, OP_PLAYER_CONNECTED,
+ p->number);
+
+ SendNetworkBufferToClient(write_buffer, player);
+
+ initNetworkBufferForWriting(write_buffer, OP_PLAYER_NAME, p->number);
+
+ putNetworkBufferString(write_buffer, p->player_name);
+
+ SendNetworkBufferToClient(write_buffer, player);
}
}
}
- player->introduced = 1;
+ player->introduced = TRUE;
}
static void Handle_OP_START_PLAYING(struct NetworkServerPlayerInfo *player)
{
- struct NetworkServerPlayerInfo *v, *w;
+ char *new_leveldir_identifier = getNetworkBufferString(read_buffer);
+ int level_nr = getNetworkBuffer16BitInteger(read_buffer);
if (options.verbose)
Error(ERR_NETWORK_SERVER,
- "client %d (%s) starts game [level %d from levedir %d (%s)]",
- player->number, player->player_name,
- (buffer[2] << 8) + buffer[3],
- (buffer[4] << 8) + buffer[5],
- &buffer[6]);
+ "client %d (%s) starts game [level %d from level set '%s']",
+ player->number, player->player_name, level_nr,
+ new_leveldir_identifier);
- for (w=first_player; w; w=w->next)
- if (w->introduced)
- w->active = 1;
+ struct NetworkServerPlayerInfo *p;
- /* reset frame counter */
+ // reset frame counter
ServerFrameCounter = 0;
- /* reset player actions */
- for (v=first_player; v; v=v->next)
+ Error(ERR_NETWORK_SERVER, "resetting ServerFrameCounter to 0");
+
+ // reset player actions
+ for (p = first_player; p != NULL; p = p->next)
{
- v->action = 0;
- v->action_received = FALSE;
+ p->action = 0;
+ p->action_received = FALSE;
+
+ if (p->introduced)
+ p->active = TRUE;
}
- broadcast(NULL, 10 + strlen((char *)&buffer[10])+1, 0);
+ copyNetworkBufferForWriting(read_buffer, write_buffer, player->number);
+
+ SendNetworkBufferToAll(write_buffer);
}
static void Handle_OP_PAUSE_PLAYING(struct NetworkServerPlayerInfo *player)
if (options.verbose)
Error(ERR_NETWORK_SERVER, "client %d (%s) pauses game",
player->number, player->player_name);
- broadcast(NULL, 2, 0);
+
+ copyNetworkBufferForWriting(read_buffer, write_buffer, player->number);
+
+ SendNetworkBufferToAll(write_buffer);
}
static void Handle_OP_CONTINUE_PLAYING(struct NetworkServerPlayerInfo *player)
if (options.verbose)
Error(ERR_NETWORK_SERVER, "client %d (%s) continues game",
player->number, player->player_name);
- broadcast(NULL, 2, 0);
+
+ copyNetworkBufferForWriting(read_buffer, write_buffer, player->number);
+
+ SendNetworkBufferToAll(write_buffer);
}
static void Handle_OP_STOP_PLAYING(struct NetworkServerPlayerInfo *player)
{
+ int cause_for_stopping = getNetworkBuffer8BitInteger(read_buffer);
+
if (options.verbose)
- Error(ERR_NETWORK_SERVER, "client %d (%s) stops game",
- player->number, player->player_name);
- broadcast(NULL, 2, 0);
+ Error(ERR_NETWORK_SERVER, "client %d (%s) stops game [%d]",
+ player->number, player->player_name, cause_for_stopping);
+
+ copyNetworkBufferForWriting(read_buffer, write_buffer, player->number);
+
+ SendNetworkBufferToAll(write_buffer);
}
-static void Handle_OP_MOVE_FIGURE(struct NetworkServerPlayerInfo *player)
+static void Handle_OP_MOVE_PLAYER(struct NetworkServerPlayerInfo *player)
{
- struct NetworkServerPlayerInfo *v;
+ int player_action = getNetworkBuffer8BitInteger(read_buffer);
int last_client_nr = 0;
+ struct NetworkServerPlayerInfo *p;
int i;
- /* store player action */
- for (v=first_player; v; v=v->next)
+ // store player action
+ for (p = first_player; p != NULL; p = p->next)
{
- if (v->number == player->number)
+ if (p->number == player->number)
{
- v->action = buffer[2];
- v->action_received = TRUE;
+ p->action = player_action;
+ p->action_received = TRUE;
}
}
- /* check if server received action from each player */
- for (v=first_player; v; v=v->next)
+ // check if server received action from each player
+ for (p = first_player; p != NULL; p = p->next)
{
- if (!v->action_received)
+ if (!p->action_received)
return;
- if (v->number > last_client_nr)
- last_client_nr = v->number;
+ if (p->number > last_client_nr)
+ last_client_nr = p->number;
}
- /* initialize all player actions to zero */
- for (i=0; i<last_client_nr; i++)
- buffer[6 + i] = 0;
+ int player_action_all[last_client_nr];
- /* broadcast actions of all players to all players */
- for (v=first_player; v; v=v->next)
+ // initialize all player actions to zero
+ for (i = 0; i < last_client_nr; i++)
+ player_action_all[i] = 0;
+
+ // broadcast actions of all players to all players
+ for (p = first_player; p != NULL; p = p->next)
{
- buffer[6 + v->number-1] = v->action;
- v->action = 0;
- v->action_received = FALSE;
+ player_action_all[p->number - 1] = p->action;
+
+ p->action = 0;
+ p->action_received = FALSE;
}
- buffer[2] = (unsigned char)((ServerFrameCounter >> 24) & 0xff);
- buffer[3] = (unsigned char)((ServerFrameCounter >> 16) & 0xff);
- buffer[4] = (unsigned char)((ServerFrameCounter >> 8) & 0xff);
- buffer[5] = (unsigned char)((ServerFrameCounter >> 0) & 0xff);
+ initNetworkBufferForWriting(write_buffer, OP_MOVE_PLAYER, player->number);
- broadcast(NULL, 6 + last_client_nr, 0);
+ putNetworkBuffer32BitInteger(write_buffer, ServerFrameCounter);
+
+ for (i = 0; i < last_client_nr; i++)
+ putNetworkBuffer8BitInteger(write_buffer, player_action_all[i]);
+
+ SendNetworkBufferToAll(write_buffer);
ServerFrameCounter++;
}
+static void Handle_OP_BROADCAST_MESSAGE(struct NetworkServerPlayerInfo *player)
+{
+ char *message = getNetworkBufferString(read_buffer);
+
+ if (options.verbose)
+ Error(ERR_NETWORK_SERVER, "client %d (%s) sends message: %s",
+ player->number, player->player_name, message);
+
+ copyNetworkBufferForWriting(read_buffer, write_buffer, player->number);
+
+ SendNetworkBufferToAllButOne(write_buffer, player);
+}
+
+static void Handle_OP_LEVEL_FILE(struct NetworkServerPlayerInfo *player)
+{
+ copyNetworkBufferForWriting(read_buffer, write_buffer, player->number);
+
+ SendNetworkBufferToAllButOne(write_buffer, player);
+}
+
+static void ExitNetworkServer(int exit_value)
+{
+ Error(ERR_NETWORK_SERVER, "exiting network server");
+
+ exit(exit_value);
+}
+
+// the following is not used for a standalone server;
+// the pointer points to an integer containing the port-number
+int NetworkServerThread(void *ptr)
+{
+ NetworkServer(*((int *) ptr), 0);
+
+ // should never be reached
+ return 0;
+}
+
void NetworkServer(int port, int serveronly)
{
- int i, sl, on;
struct NetworkServerPlayerInfo *player;
- int mfd;
- int r;
- unsigned int len;
- struct protoent *tcpproto;
- struct timeval tv;
- int is_daemon = 0;
-
-#ifndef NeXT
+ IPaddress ip;
+
+#if defined(PLATFORM_UNIX) && !defined(PLATFORM_NEXT)
struct sigaction sact;
#endif
+ if (read_buffer == NULL)
+ read_buffer = newNetworkBuffer();
+
+ if (write_buffer == NULL)
+ write_buffer = newNetworkBuffer();
+
if (port == 0)
port = DEFAULT_SERVER_PORT;
- if (!serveronly)
- onceonly = 1;
+ // if only running the network server, exit on Ctrl-C
+ if (serveronly)
+ signal(SIGINT, ExitNetworkServer);
- if ((tcpproto = getprotobyname("tcp")) != NULL)
- tcp = tcpproto->p_proto;
+ if (!serveronly)
+ run_server_only_once = TRUE;
-#ifdef NeXT
+#if defined(PLATFORM_UNIX)
+#if defined(PLATFORM_NEXT)
signal(SIGPIPE, SIG_IGN);
#else
sact.sa_handler = SIG_IGN;
sigemptyset(&sact.sa_mask);
sact.sa_flags = 0;
sigaction(SIGPIPE, &sact, NULL);
+#endif
#endif
+ if (SDLNet_ResolveHost(&ip, NULL, port) == -1)
+ Error(ERR_EXIT_NETWORK_SERVER, "SDLNet_ResolveHost() failed: %s",
+ SDLNet_GetError());
- if ((lfd = socket(PF_INET, SOCK_STREAM, 0)) < 0)
- Error(ERR_EXIT_NETWORK_SERVER, "socket() failed");
+ if ((fds = SDLNet_AllocSocketSet(MAX_PLAYERS + 1 + 1)) == NULL)
+ Error(ERR_EXIT_NETWORK_SERVER, "SDLNet_AllocSocketSet() failed: %s"),
+ SDLNet_GetError();
- saddr.sin_family = AF_INET;
- saddr.sin_addr.s_addr = htonl(INADDR_ANY);
- saddr.sin_port = htons(port);
+ if ((lfd = SDLNet_TCP_Open(&ip)) == NULL)
+ Error(ERR_EXIT_NETWORK_SERVER, "SDLNet_TCP_Open() failed: %s"),
+ SDLNet_GetError();
- on = 1;
+ if (SDLNet_TCP_AddSocket(fds, lfd) == -1)
+ Error(ERR_EXIT_NETWORK_SERVER, "SDLNet_TCP_AddSocket() failed: %s"),
+ SDLNet_GetError();
- setsockopt(lfd, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(int));
- if (bind(lfd, (struct sockaddr *)&saddr, sizeof(saddr)) < 0)
- Error(ERR_EXIT_NETWORK_SERVER, "bind() failed");
+ if ((udp = SDLNet_UDP_Open(port)) == NULL)
+ Error(ERR_EXIT_NETWORK_SERVER, "SDLNet_UDP_Open() failed: %s",
+ SDLNet_GetError());
- listen(lfd, 5);
-
- if (is_daemon)
- {
- /* become a daemon, breaking all ties with the controlling terminal */
- options.verbose = 0;
- for (i=0; i<255; i++)
- {
- if (i != lfd)
- close(i);
- }
-
- if (fork())
- exit(0);
- setsid();
- if (fork())
- exit(0);
- chdir("/");
-
- /* open a fake stdin, stdout, stderr, just in case */
- open("/dev/null", O_RDONLY);
- open("/dev/null", O_WRONLY);
- open("/dev/null", O_WRONLY);
- }
+ if (SDLNet_UDP_AddSocket(fds, udp) == -1)
+ Error(ERR_EXIT_NETWORK_SERVER, "SDLNet_TCP_AddSocket() failed: %s"),
+ SDLNet_GetError();
if (options.verbose)
{
Error(ERR_NETWORK_SERVER, "started up, listening on port %d", port);
Error(ERR_NETWORK_SERVER, "using protocol version %d.%d.%d",
- PROTOCOL_VERSION_1, PROTOCOL_VERSION_2, PROTOCOL_VERSION_3);
+ PROTOCOL_VERSION_MAJOR,
+ PROTOCOL_VERSION_MINOR,
+ PROTOCOL_VERSION_PATCH);
}
- while(1)
+ while (1)
{
- interrupt = 0;
+ // wait for 100 ms for activity on open network sockets
+ if (SDLNet_CheckSockets(fds, 100) < 1)
+ continue;
- for (player=first_player; player; player=player->next)
- flushuser(player);
+ // accept incoming TCP connections
+ if (SDLNet_SocketReady(lfd))
+ {
+ Error(ERR_DEBUG, "got TCP packet");
+
+ TCPsocket newsock;
+
+ newsock = SDLNet_TCP_Accept(lfd);
+
+ if (newsock)
+ AddPlayer(newsock);
+ }
- FD_ZERO(&fds);
- mfd = lfd;
- player = first_player;
- while (player)
+ // accept incoming UDP packets
+ if (SDLNet_SocketReady(udp))
{
- FD_SET(player->fd, &fds);
- if (player->fd > mfd)
- mfd = player->fd;
- player = player->next;
+ Error(ERR_DEBUG, "got UDP packet");
+
+ static UDPpacket packet;
+
+ int num_packets = SDLNet_UDP_Recv(udp, &packet);
+
+ if (num_packets == 1)
+ {
+ // bounce packet
+ SDLNet_UDP_Send(udp, -1, &packet);
+ }
}
- FD_SET(lfd, &fds);
- tv.tv_sec = 0;
- tv.tv_usec = 500000;
- if ((sl = select(mfd + 1, &fds, NULL, NULL, &tv)) < 0)
+
+ for (player = first_player; player != NULL; player = player->next)
{
- if (errno != EINTR)
- Error(ERR_EXIT_NETWORK_SERVER, "select() failed");
- else
+ if (!SDLNet_SocketReady(player->fd))
continue;
- }
- if (sl < 0)
- continue;
-
- if (sl == 0)
- continue;
+ initNetworkBufferForReceiving(read_buffer);
- if (FD_ISSET(lfd, &fds))
- {
- int newfd, slen;
+ int num_bytes = receiveNetworkBufferPacket(read_buffer, player->fd);
- slen = sizeof(saddr);
- newfd = accept(lfd, (struct sockaddr *)&saddr, &slen);
- if (newfd < 0)
+ if (num_bytes <= 0)
{
- if (errno != EINTR)
- Error(ERR_EXIT_NETWORK_SERVER, "accept() failed");
+ if (options.verbose)
+ Error(ERR_NETWORK_SERVER, "EOF from client %d (%s)",
+ player->number, player->player_name);
+
+ RemovePlayer(player);
+
+ break;
}
- else
+
+ initNetworkBufferForReading(read_buffer);
+
+ int message_type = getNetworkBuffer8BitInteger(read_buffer);
+
+ // skip player number
+ getNetworkBuffer8BitInteger(read_buffer);
+
+ if (!player->introduced &&
+ message_type != OP_PLAYER_NAME &&
+ message_type != OP_PROTOCOL_VERSION)
{
- if (tcp != -1)
- {
- on = 1;
- setsockopt(newfd, tcp, TCP_NODELAY, (char *)&on, sizeof(int));
- }
- AddPlayer(newfd);
- }
- continue;
- }
+ if (options.verbose)
+ Error(ERR_NETWORK_SERVER, "got opcode %d for client %d which is not introduced yet (expected OP_PLAYER_NAME or OP_PROTOCOL_VERSION)", message_type, player->number);
- player = first_player;
+ RemovePlayer(player);
- do
- {
- if (FD_ISSET(player->fd, &fds))
+ break;
+ }
+
+ switch (message_type)
{
- r = read(player->fd, player->readbuffer + player->nread, MAX_BUFFER_SIZE - player->nread);
- if (r <= 0)
- {
- if (options.verbose)
- Error(ERR_NETWORK_SERVER, "EOF from client %d (%s)",
- player->number, player->player_name);
- RemovePlayer(player);
- interrupt = 1;
+ case OP_PROTOCOL_VERSION:
+ Handle_OP_PROTOCOL_VERSION(player);
+ break;
+
+ case OP_NUMBER_WANTED:
+ Handle_OP_NUMBER_WANTED(player);
break;
- }
- player->nread += r;
- while (player->nread >= 4 && player->nread >= 4 + player->readbuffer[3])
- {
- len = player->readbuffer[3];
- if (player->readbuffer[0] || player->readbuffer[1] || player->readbuffer[2])
- {
- if (options.verbose)
- Error(ERR_NETWORK_SERVER, "crap from client %d (%s)",
- player->number, player->player_name);
- RemovePlayer(player);
- interrupt = 1;
- break;
- }
- memcpy(buffer, &player->readbuffer[4], len);
- player->nread -= 4 + len;
- memmove(player->readbuffer, player->readbuffer + 4 + len, player->nread);
-
- buffer[0] = player->number;
- if (!player->introduced && buffer[1] != OP_PLAYER_NAME)
- {
- if (options.verbose)
- Error(ERR_NETWORK_SERVER, "!(client %d)->introduced && buffer[1]==%d (expected OP_PLAYER_NAME)", buffer[0], buffer[1]);
-
- RemovePlayer(player);
- interrupt = 1;
- break;
- }
-
- switch(buffer[1])
- {
- case OP_PLAYER_NAME:
- Handle_OP_PLAYER_NAME(player, len);
- break;
-
- case OP_PROTOCOL_VERSION:
- Handle_OP_PROTOCOL_VERSION(player, len);
- break;
-
- case OP_NUMBER_WANTED:
- Handle_OP_NUMBER_WANTED(player);
- break;
-
- case OP_START_PLAYING:
- Handle_OP_START_PLAYING(player);
- break;
-
- case OP_PAUSE_PLAYING:
- Handle_OP_PAUSE_PLAYING(player);
- break;
-
- case OP_CONTINUE_PLAYING:
- Handle_OP_CONTINUE_PLAYING(player);
- break;
-
- case OP_STOP_PLAYING:
- Handle_OP_STOP_PLAYING(player);
- break;
-
- case OP_MOVE_FIGURE:
- Handle_OP_MOVE_FIGURE(player);
- break;
-
- case OP_BROADCAST_MESSAGE:
- buffer[len] = '\0';
- if (options.verbose)
- Error(ERR_NETWORK_SERVER, "client %d (%s) sends message: %s",
- player->number, player->player_name, &buffer[2]);
- broadcast(player, len, 0);
- break;
-
- default:
- if (options.verbose)
- Error(ERR_NETWORK_SERVER,
- "unknown opcode %d from client %d (%s)",
- buffer[0], player->number, player->player_name);
- }
- }
- }
- if (player && !interrupt)
- player = player->next;
+ case OP_PLAYER_NAME:
+ Handle_OP_PLAYER_NAME(player);
+ break;
+
+ case OP_START_PLAYING:
+ Handle_OP_START_PLAYING(player);
+ break;
+
+ case OP_PAUSE_PLAYING:
+ Handle_OP_PAUSE_PLAYING(player);
+ break;
+
+ case OP_CONTINUE_PLAYING:
+ Handle_OP_CONTINUE_PLAYING(player);
+ break;
+
+ case OP_STOP_PLAYING:
+ Handle_OP_STOP_PLAYING(player);
+ break;
+
+ case OP_MOVE_PLAYER:
+ Handle_OP_MOVE_PLAYER(player);
+ break;
+
+ case OP_BROADCAST_MESSAGE:
+ Handle_OP_BROADCAST_MESSAGE(player);
+ break;
+
+ case OP_LEVEL_FILE:
+ Handle_OP_LEVEL_FILE(player);
+ break;
+
+ default:
+ if (options.verbose)
+ Error(ERR_NETWORK_SERVER,
+ "unknown opcode %d from client %d (%s)",
+ message_type, player->number, player->player_name);
+ }
}
- while (player && !interrupt);
}
}
-
-#endif /* !MSDOS && !WIN32 */
projects / rocksndiamonds.git / blobdiff