project_files/HedgewarsMobile/Classes/ServerProtocolNetwork.m
author Wuzzy <Wuzzy2@mail.ru>
Mon, 16 Sep 2019 17:33:49 +0200
changeset 15431 8504fee3b601
parent 12872 00215a7ec5f5
permissions -rw-r--r--
Racer: Fix weird water splashes after waypoint placement Does not affect official racer, as only waypoint placement is touched. The reason was that the air attack gear sometimes was not deleted fast enough so it might occassionally drop some air bombs (these are deleted now). Also, the airplane position was set to water level, which caused another water splash.
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/*
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 * Hedgewars-iOS, a Hedgewars port for iOS devices
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 * Copyright (c) 2009-2012 Vittorio Giovara <vittorio.giovara@gmail.com>
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; version 2 of the License
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
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 */
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#import "ServerProtocolNetwork.h"
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#import "hwconsts.h"
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#define BUFFER_SIZE 256
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static ServerProtocolNetwork *serverConnection;
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@implementation ServerProtocolNetwork
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@synthesize serverPort, serverAddress, ssd;
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#pragma mark -
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#pragma mark init and class methods
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- (id)init:(NSInteger)onPort withAddress:(NSString *)address {
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    if ((self = [super init])) {
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        self.serverPort = onPort;
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        self.serverAddress = address;
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    }
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    serverConnection = self;
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    return self;
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}
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- (id)init {
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    return [self init:NETGAME_DEFAULT_PORT withAddress:@"netserver.hedgewars.org"];
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}
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- (id)initOnPort:(NSInteger)port {
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    return [self init:port withAddress:@"netserver.hedgewars.org"];
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}
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- (id)initToAddress:(NSString *)address {
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    return [self init:NETGAME_DEFAULT_PORT withAddress:address];
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}
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- (void)dealloc {
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    serverConnection = nil;
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}
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+(id) openServerConnection {
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    id connection = [[self alloc] init];
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    [NSThread detachNewThreadSelector:@selector(serverProtocol)
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                             toTarget:connection
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                           withObject:nil];
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        // retain count here is +2
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    return connection;
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}
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#pragma mark -
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#pragma mark Communication layer
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-(int) sendToServer:(NSString *)command {
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    NSString *message = [[NSString alloc] initWithFormat:@"%@\n\n",command];
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    int result = SDLNet_TCP_Send(self.ssd, [message UTF8String], [message lengthOfBytesUsingEncoding:NSUTF8StringEncoding]);
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    return result;
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}
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-(int) sendToServer:(NSString *)command withArgument:(NSString *)argument {
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    NSString *message = [[NSString alloc] initWithFormat:@"%@\n%@\n\n",command,argument];
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    int result = SDLNet_TCP_Send(self.ssd, [message UTF8String], [message lengthOfBytesUsingEncoding:NSUTF8StringEncoding]);
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    return result;
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}
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- (void)serverProtocol {
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    @autoreleasepool {
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    IPaddress ip;
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    BOOL clientQuit = NO;
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    char *buffer = (char *)malloc(sizeof(char)*BUFFER_SIZE);
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    int dim = BUFFER_SIZE;
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    uint8_t msgSize;
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    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
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    if (SDLNet_Init() < 0) {
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        DLog(@"SDLNet_Init: %s", SDLNet_GetError());
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        clientQuit = YES;
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    }
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    // Resolving the host using NULL make network interface to listen
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    if (SDLNet_ResolveHost(&ip, [self.serverAddress UTF8String] , self.serverPort) < 0 && !clientQuit) {
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        DLog(@"SDLNet_ResolveHost: %s", SDLNet_GetError());
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        clientQuit = YES;
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    }
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    // Open a connection with the IP provided (listen on the host's port)
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    if (!(self.ssd = SDLNet_TCP_Open(&ip)) && !clientQuit) {
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        DLog(@"SDLNet_TCP_Open: %s %d", SDLNet_GetError(), self.serverPort);
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        clientQuit = YES;
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    }
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    DLog(@"Found server on port %d", self.serverPort);
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    while (!clientQuit) {
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        int index = 0;
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        BOOL exitBufferLoop = NO;
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        memset(buffer, '\0', dim);
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        while (exitBufferLoop != YES) {
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            msgSize = SDLNet_TCP_Recv(self.ssd, &buffer[index], 2);
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            // exit in case of error
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            if (msgSize <= 0) {
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                DLog(@"SDLNet_TCP_Recv: %s", SDLNet_GetError());
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                clientQuit = YES;
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                break;
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            }
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            // update index position and check for End-Of-Message
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            index += msgSize;
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            if (strncmp(&buffer[index-2], "\n\n", 2) == 0) {
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                exitBufferLoop = YES;
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            }
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            // if message is too big allocate new space
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            if (index >= dim) {
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                dim += BUFFER_SIZE;
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                buffer = (char *)realloc(buffer, dim);
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                if (buffer == NULL) {
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                    clientQuit = YES;
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                    break;
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                }
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            }
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        }
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        NSString *bufferedMessage = [[NSString alloc] initWithBytes:buffer length:index-2 encoding:NSASCIIStringEncoding];
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        NSArray *listOfCommands = [bufferedMessage componentsSeparatedByString:@"\n"];
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        NSString *command = [listOfCommands objectAtIndex:0];
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        DLog(@"size = %d, %@", index-2, listOfCommands);
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        if ([command isEqualToString:@"PING"]) {
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            if ([listOfCommands count] > 1)
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                [self sendToServer:@"PONG" withArgument:[listOfCommands objectAtIndex:1]];
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            else
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                [self sendToServer:@"PONG"];
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            DLog(@"PONG");
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        }
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        else if ([command isEqualToString:@"NICK"]) {
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            //what is this for?
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        }
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        else if ([command isEqualToString:@"PROTO"]) {
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            //what is this for?
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        }
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        else if ([command isEqualToString:@"ROOM"]) {
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            //TODO: stub
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        }
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        else if ([command isEqualToString:@"LOBBY:LEFT"]) {
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            //TODO: stub
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        }
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        else if ([command isEqualToString:@"LOBBY:JOINED"]) {
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            //TODO: stub
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        }
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        else if ([command isEqualToString:@"ASKPASSWORD"]) {
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            NSString *pwd = [defaults objectForKey:@"password"];
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            [self sendToServer:@"PASSWORD" withArgument:pwd];
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        }
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        else if ([command isEqualToString:@"CONNECTED"]) {
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            int netProto;
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            char *versionStr;
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            HW_versionInfo(&netProto, &versionStr);
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            NSString *nick = [defaults objectForKey:@"username"];
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            [self sendToServer:@"NICK" withArgument:nick];
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            [self sendToServer:@"PROTO" withArgument:[NSString stringWithFormat:@"%d",netProto]];
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        }
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        else if ([command isEqualToString:@"SERVER_MESSAGE"]) {
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            DLog(@"%@", [listOfCommands objectAtIndex:1]);
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        }
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        else if ([command isEqualToString:@"WARNING"]) {
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            if ([listOfCommands count] > 1)
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                DLog(@"Server warning - %@", [listOfCommands objectAtIndex:1]);
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            else
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                DLog(@"Server warning - unknown");
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        }
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        else if ([command isEqualToString:@"ERROR"]) {
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            DLog(@"Server error - %@", [listOfCommands objectAtIndex:1]);
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        }
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        else if ([command isEqualToString:@"BYE"]) {
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            //TODO: handle "Reconnected too fast"
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            DLog(@"Server disconnected, reason: %@", [listOfCommands objectAtIndex:1]);
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            clientQuit = YES;
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        }
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        else {
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            DLog(@"Unknown/Unsupported message received: %@", command);
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        }
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    }
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    DLog(@"Server closed connection, ending thread");
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    free(buffer);
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    SDLNet_TCP_Close(self.ssd);
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    SDLNet_Quit();
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    }
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}
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@end