summaryrefslogtreecommitdiff
path: root/src/net/tmwa/network.cpp
blob: 1ed7ee581f87c6d599a528a3084f8ffc912e5684 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
/*
 *  The ManaPlus Client
 *  Copyright (C) 2004-2009  The Mana World Development Team
 *  Copyright (C) 2009-2010  The Mana Developers
 *  Copyright (C) 2011-2013  The ManaPlus Developers
 *
 *  This file is part of The ManaPlus Client.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "net/tmwa/network.h"

#include "logger.h"

#include "net/tmwa/messagein.h"
#include "net/tmwa/protocol.h"

#include "debug.h"

namespace TmwAthena
{
/** Warning: buffers and other variables are shared,
    so there can be only one connection active at a time */

int16_t packet_lengths[] =
{
 10,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
  0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
  0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
  0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
// #0x0040
  0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
  0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
  0,  50,   3,  -1,  55,  17,   3,  37,  46,  -1,  23,  -1,   3, 108,   3,   2,
  3,  28,  19,  11,   3,  -1,   9,   5,  54,  53,  58,  60,  41,   2,   6,   6,
// #0x0080
  7,   3,   2,   2,   2,   5,  16,  12,  10,   7,  29,  23,  -1,  -1,  -1,   0,
  7,  22,  28,   2,   6,  30,  -1,  -1,   3,  -1,  -1,   5,   9,  17,  17,   6,
 23,   6,   6,  -1,  -1,  -1,  -1,   8,   7,   6,   7,   4,   7,   0,  -1,   6,
  8,   8,   3,   3,  -1,   6,   6,  -1,   7,   6,   2,   5,   6,  44,   5,   3,
// #0x00C0
  7,   2,   6,   8,   6,   7,  -1,  -1,  -1,  -1,   3,   3,   6,   6,   2,  27,
  3,   4,   4,   2,  -1,  -1,   3,  -1,   6,  14,   3,  -1,  28,  29,  -1,  -1,
 30,  30,  26,   2,   6,  26,   3,   3,   8,  19,   5,   2,   3,   2,   2,   2,
  3,   2,   6,   8,  21,   8,   8,   2,   2,  26,   3,  -1,   6,  27,  30,  10,
// #0x0100
  2,   6,   6,  30,  79,  31,  10,  10,  -1,  -1,   4,   6,   6,   2,  11,  -1,
 10,  39,   4,  10,  31,  35,  10,  18,   2,  13,  15,  20,  68,   2,   3,  16,
  6,  14,  -1,  -1,  21,   8,   8,   8,   8,   8,   2,   2,   3,   4,   2,  -1,
  6,  86,   6,  -1,  -1,   7,  -1,   6,   3,  16,   4,   4,   4,   6,  24,  26,
// #0x0140
 22,  14,   6,  10,  23,  19,   6,  39,   8,   9,   6,  27,  -1,   2,   6,   6,
110,   6,  -1,  -1,  -1,  -1,  -1,   6,  -1,  54,  66,  54,  90,  42,   6,  42,
 -1,  -1,  -1,  -1,  -1,  30,  -1,   3,  14,   3,  30,  10,  43,  14, 186, 182,
 14,  30,  10,   3,  -1,   6, 106,  -1,   4,   5,   4,  -1,   6,   7,  -1,  -1,
// #0x0180
  6,   3,  106,  10,  10, 34,   0,   6,   8,   4,   4,   4,  29,  -1,  10,   6,
 90,  86,  24,   6,  30, 102,   9,   4,   8,   4,  14,  10,   4,   6,   2,   6,
  3,   3,  35,   5,  11,  26,  -1,   4,   4,   6,  10,  12,   6,  -1,   4,   4,
 11,   7,  -1,  67,  12,  18, 114,   6,   3,   6,  26,  26,  26,  26,   2,   3,
// #0x01C0
  2,  14,  10,  -1,  22,  22,   4,   2,  13,  97,   0,   9,   9,  29,   6,  28,
  8,  14,  10,  35,   6,   8,   4,  11,  54,  53,  60,   2,  -1,  47,  33,   6,
 30,   8,  34,  14,   2,   6,  26,   2,  28,  81,   6,  10,  26,   2,  -1,  -1,
 -1,  -1,  20,  10,  32,   9,  34,  14,   2,   6,  48,  56,  -1,   4,   5,  10,
// #0x0200
 26,   0,   0,   0,  18,   0,   0,   0,   0,   0,   0,  19,  10,   0,   0,   0,
  2,  -1,  16,   0,   8,  -1,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
 -1, 122,  -1,  -1,  -1,  -1,  10,   0,   0,   0,   0,   0,   0,   0,   0,   0,
};

static const int packet_lengths_size
    = static_cast<int>(sizeof(packet_lengths) / sizeof(int16_t));
static const int messagesSize = 0xffff;
Network *Network::mInstance = nullptr;

Network::Network() :
    Ea::Network(),
    mMessageHandlers(new MessageHandler*[messagesSize])
{
    mInstance = this;
    memset(&mMessageHandlers[0], 0, sizeof(MessageHandler*) * 0xffff);
}

Network::~Network()
{
    clearHandlers();
    delete mMessageHandlers;
    mMessageHandlers = nullptr;
    mInstance = nullptr;
}

void Network::registerHandler(MessageHandler *const handler)
{
    if (!handler)
        return;

    for (const uint16_t *i = handler->handledMessages; *i; ++i)
        mMessageHandlers[*i] = handler;

    handler->setNetwork(this);
}

void Network::unregisterHandler(MessageHandler *const handler)
{
    if (!handler)
        return;

    for (const uint16_t *i = handler->handledMessages; *i; ++i)
        mMessageHandlers[*i] = nullptr;

    handler->setNetwork(nullptr);
}

void Network::clearHandlers()
{
    for (int f = 0; f < messagesSize; f ++)
    {
        if (mMessageHandlers[f])
        {
            mMessageHandlers[f]->setNetwork(nullptr);
            mMessageHandlers[f] = nullptr;
        }
    }
}

void Network::dispatchMessages()
{
    BLOCK_START("Network::dispatchMessages 1")
    while (messageReady())
    {
        SDL_mutexP(mMutexIn);
        BLOCK_START("Network::dispatchMessages 2")
        const int msgId = readWord(0);
        int len = -1;
        if (msgId == SMSG_SERVER_VERSION_RESPONSE)
            len = 10;
        else if (msgId == SMSG_UPDATE_HOST2)
            len = -1;
        else if (msgId >= 0 && msgId < packet_lengths_size)
            len = packet_lengths[msgId];

        if (len == -1)
            len = readWord(2);

        MessageIn msg(mInBuffer, len);
        msg.postInit();
        SDL_mutexV(mMutexIn);
        BLOCK_END("Network::dispatchMessages 2")
        BLOCK_START("Network::dispatchMessages 3")

        if (len == 0)
        {
            // need copy data for safty
            std::string str = strprintf("Wrong packet %d ""received. Exiting.",
                msgId);
            logger->safeError(str);
        }

        if (msgId >= 0 && msgId < messagesSize)
        {
            MessageHandler *const handler = mMessageHandlers[msgId];
            if (handler)
                handler->handleMessage(msg);
            else
                logger->log("Unhandled packet: %x", msgId);
        }

        skip(len);
        BLOCK_END("Network::dispatchMessages 3")
    }
    BLOCK_END("Network::dispatchMessages 1")
}

bool Network::messageReady()
{
    int len = -1;

    SDL_mutexP(mMutexIn);
    if (mInSize >= 2)
    {
        const int msgId = readWord(0);
        if (msgId == SMSG_SERVER_VERSION_RESPONSE)
        {
            len = 10;
        }
        else if (msgId == SMSG_UPDATE_HOST2)
        {
            len = -1;
        }
        else
        {
            if (msgId >= 0 && msgId < packet_lengths_size)
                len = packet_lengths[msgId];
        }

        if (len == -1 && mInSize > 4)
            len = readWord(2);
    }

    const bool ret = (mInSize >= static_cast<unsigned int>(len));
    SDL_mutexV(mMutexIn);

    return ret;
}

Network *Network::instance()
{
    return mInstance;
}

}  // namespace TmwAthena