1 /*

     2  * Hedgewars-iOS, a Hedgewars port for iOS devices

     3  * Copyright (c) 2009-2011 Vittorio Giovara <vittorio.giovara@gmail.com>

     4  *

     5  * This program is free software; you can redistribute it and/or modify

     6  * it under the terms of the GNU General Public License as published by

     7  * the Free Software Foundation; version 2 of the License

     8  *

     9  * This program is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    12  * GNU General Public License for more details.

    13  *

    14  * You should have received a copy of the GNU General Public License

    15  * along with this program; if not, write to the Free Software

    16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

    17  *

    18  * File created on 10/01/2010.

    19  */

    20 

    21 

    22 #import "ServerProtocolNetwork.h"

    23 #import "SDL_net.h"

    24 #import "hwconsts.h"

    25 

    26 #define BUFFER_SIZE 256

    27 

    28 static TCPsocket sd;

    29 static ServerProtocolNetwork *serverConnection;

    30 

    31 @implementation ServerProtocolNetwork

    32 @synthesize serverPort, serverAddress;

    33 

    34 -(id) init {

    35     if (self = [super init]) {

    36         self.serverPort = NETGAME_DEFAULT_PORT;

    37         self.serverAddress = @"netserver.hedgewars.org";

    38     }

    39     serverConnection = self;

    40     return self;

    41 }

    42 

    43 -(void) dealloc {

    44     releaseAndNil(serverAddress);

    45     [super dealloc];

    46 }

    47 

    48 -(int) sendToServer:(NSString *)command {

    49     NSString *message = [[NSString alloc] initWithFormat:@"%@\n\n",command];

    50     int result = SDLNet_TCP_Send(sd, [message UTF8String], [message length]);

    51     [message release];

    52     return result;

    53 }

    54 

    55 -(int) sendToServer:(NSString *)command withArgument:(NSString *)argument {

    56     NSString *message = [[NSString alloc] initWithFormat:@"%@\n%@\n\n",command,argument];

    57     int result = SDLNet_TCP_Send(sd, [message UTF8String], [message length]);

    58     [message release];

    59     return result;

    60 }

    61 

    62 -(void) serverProtocol {

    63     NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    64     IPaddress ip;

    65     BOOL clientQuit = NO;

    66     char *buffer = (char *)malloc(sizeof(char)*BUFFER_SIZE);

    67     int dim = BUFFER_SIZE;

    68     uint8_t msgSize;

    69     NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];

    70 

    71     if (SDLNet_Init() < 0) {

    72         DLog(@"SDLNet_Init: %s", SDLNet_GetError());

    73         clientQuit = YES;

    74     }

    75 

    76     // Resolving the host using NULL make network interface to listen

    77     if (SDLNet_ResolveHost(&ip, [self.serverAddress UTF8String] , self.serverPort) < 0 && !clientQuit) {

    78         DLog(@"SDLNet_ResolveHost: %s", SDLNet_GetError());

    79         clientQuit = YES;

    80     }

    81 

    82     // Open a connection with the IP provided (listen on the host's port)

    83     if (!(sd = SDLNet_TCP_Open(&ip)) && !clientQuit) {

    84         DLog(@"SDLNet_TCP_Open: %s %d", SDLNet_GetError(), self.serverPort);

    85         clientQuit = YES;

    86     }

    87 

    88     DLog(@"Found server on port %d", self.serverPort);

    89     while (!clientQuit) {

    90         int index = 0;

    91         BOOL exitBufferLoop = NO;

    92         memset(buffer, '\0', dim);

    93 

    94         while (exitBufferLoop != YES) {

    95             msgSize = SDLNet_TCP_Recv(sd, &buffer[index], 2);

    96 

    97             // exit in case of error

    98             if (msgSize <= 0) {

    99                 DLog(@"SDLNet_TCP_Recv: %s", SDLNet_GetError());

   100                 clientQuit = YES;

   101                 break;

   102             }

   103 

   104             // update index position and check for End-Of-Message

   105             index += msgSize;

   106             if (strncmp(&buffer[index-2], "\n\n", 2) == 0) {

   107                 exitBufferLoop = YES;

   108             }

   109 

   110             // if message is too big allocate new space

   111             if (index >= dim) {

   112                 dim += BUFFER_SIZE;

   113                 buffer = (char *)realloc(buffer, dim);

   114                 if (buffer == NULL) {

   115                     clientQuit = YES;

   116                     break;

   117                 }

   118             }

   119         }

   120 

   121         NSString *bufferedMessage = [[NSString alloc] initWithBytes:buffer length:index-2 encoding:NSASCIIStringEncoding];

   122         NSArray *listOfCommands = [bufferedMessage componentsSeparatedByString:@"\n"];

   123         [bufferedMessage release];

   124         NSString *command = [listOfCommands objectAtIndex:0];

   125         DLog(@"size = %d, %@", index-2, listOfCommands);

   126         if ([command isEqualToString:@"PING"]) {

   127             if ([listOfCommands count] > 1)

   128                 [self sendToServer:@"PONG" withArgument:[listOfCommands objectAtIndex:1]];

   129             else

   130                 [self sendToServer:@"PONG"];

   131             DLog(@"PONG");

   132         }

   133         else if ([command isEqualToString:@"NICK"]) {

   134             //what is this for?

   135         }

   136         else if ([command isEqualToString:@"PROTO"]) {

   137             //what is this for?

   138         }

   139         else if ([command isEqualToString:@"ROOM"]) {

   140             //TODO: stub

   141         }

   142         else if ([command isEqualToString:@"LOBBY:LEFT"]) {

   143             //TODO: stub

   144         }

   145         else if ([command isEqualToString:@"LOBBY:JOINED"]) {

   146             //TODO: stub

   147         }

   148         else if ([command isEqualToString:@"ASKPASSWORD"]) {

   149             NSString *pwd = [defaults objectForKey:@"password"];

   150             [self sendToServer:@"PASSWORD" withArgument:pwd];

   151         }

   152         else if ([command isEqualToString:@"CONNECTED"]) {

   153             int netProto;

   154             char *versionStr;

   155             HW_versionInfo(&netProto, &versionStr);

   156             NSString *nick = [defaults objectForKey:@"username"];

   157             [self sendToServer:@"NICK" withArgument:nick];

   158             [self sendToServer:@"PROTO" withArgument:[NSString stringWithFormat:@"%d",netProto]];

   159         }

   160         else if ([command isEqualToString:@"SERVER_MESSAGE"]) {

   161             DLog(@"%@", [listOfCommands objectAtIndex:1]);

   162         }

   163         else if ([command isEqualToString:@"WARNING"]) {

   164             if ([listOfCommands count] > 1)

   165                 DLog(@"Server warning - %@", [listOfCommands objectAtIndex:1]);

   166             else

   167                 DLog(@"Server warning - unknown");

   168         }

   169         else if ([command isEqualToString:@"ERROR"]) {

   170             DLog(@"Server error - %@", [listOfCommands objectAtIndex:1]);

   171         }

   172         else if ([command isEqualToString:@"BYE"]) {

   173             //TODO: handle "Reconnected too fast"

   174             DLog(@"Server disconnected, reason: %@", [listOfCommands objectAtIndex:1]);

   175             clientQuit = YES;

   176         }

   177         else {

   178             DLog(@"Unknown/Unsupported message received: %@", command);

   179         }

   180     }

   181     DLog(@"Server closed connection, ending thread");

   182 

   183     free(buffer);

   184     SDLNet_TCP_Close(sd);

   185     SDLNet_Quit();

   186 

   187     [pool release];

   188 }

   189 

   190 @end