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
|
/* $Id$ */
/*
* This file is part of OpenTTD.
* OpenTTD 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, version 2.
* OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file tcp_content.cpp Basic functions to receive and send Content packets.
*/
#ifdef ENABLE_NETWORK
#include "../../stdafx.h"
#include "tcp_content.h"
ContentInfo::ContentInfo()
{
memset(this, 0, sizeof(*this));
}
ContentInfo::~ContentInfo()
{
free(this->dependencies);
free(this->tags);
}
size_t ContentInfo::Size() const
{
size_t len = 0;
for (uint i = 0; i < this->tag_count; i++) len += strlen(this->tags[i]) + 1;
/* The size is never larger than the content info size plus the size of the
* tags and dependencies */
return sizeof(*this) +
sizeof(this->dependency_count) +
sizeof(*this->dependencies) * this->dependency_count;
}
bool ContentInfo::IsSelected() const
{
switch (this->state) {
case ContentInfo::SELECTED:
case ContentInfo::AUTOSELECTED:
case ContentInfo::ALREADY_HERE:
return true;
default:
return false;
}
}
bool ContentInfo::IsValid() const
{
return this->state < ContentInfo::INVALID && this->type >= CONTENT_TYPE_BEGIN && this->type < CONTENT_TYPE_END;
}
void NetworkContentSocketHandler::Close()
{
CloseConnection();
if (this->sock == INVALID_SOCKET) return;
closesocket(this->sock);
this->sock = INVALID_SOCKET;
}
/**
* Defines a simple (switch) case for each network packet
* @param type the packet type to create the case for
*/
#define CONTENT_COMMAND(type) case type: return this->NetworkPacketReceive_ ## type ## _command(p); break;
/**
* Handle an incoming packets by sending it to the correct function.
* @param p the received packet
*/
bool NetworkContentSocketHandler::HandlePacket(Packet *p)
{
PacketContentType type = (PacketContentType)p->Recv_uint8();
switch (this->HasClientQuit() ? PACKET_CONTENT_END : type) {
CONTENT_COMMAND(PACKET_CONTENT_CLIENT_INFO_LIST);
CONTENT_COMMAND(PACKET_CONTENT_CLIENT_INFO_ID);
CONTENT_COMMAND(PACKET_CONTENT_CLIENT_INFO_EXTID);
CONTENT_COMMAND(PACKET_CONTENT_CLIENT_INFO_EXTID_MD5);
CONTENT_COMMAND(PACKET_CONTENT_SERVER_INFO);
CONTENT_COMMAND(PACKET_CONTENT_CLIENT_CONTENT);
CONTENT_COMMAND(PACKET_CONTENT_SERVER_CONTENT);
default:
if (this->HasClientQuit()) {
DEBUG(net, 0, "[tcp/content] received invalid packet type %d from %s", type, this->client_addr.GetAddressAsString());
} else {
DEBUG(net, 0, "[tcp/content] received illegal packet from %s", this->client_addr.GetAddressAsString());
}
return false;
}
}
/**
* Receive a packet at UDP level
*/
void NetworkContentSocketHandler::Recv_Packets()
{
Packet *p;
while ((p = this->Recv_Packet()) != NULL) {
bool cont = HandlePacket(p);
delete p;
if (!cont) return;
}
}
/**
* Create stub implementations for all receive commands that only
* show a warning that the given command is not available for the
* socket where the packet came from.
* @param type the packet type to create the stub for
*/
#define DEFINE_UNAVAILABLE_CONTENT_RECEIVE_COMMAND(type) \
bool NetworkContentSocketHandler::NetworkPacketReceive_## type ##_command(Packet *p) \
{ \
DEBUG(net, 0, "[tcp/content] received illegal packet type %d from %s", \
type, this->client_addr.GetAddressAsString()); \
return false; \
}
DEFINE_UNAVAILABLE_CONTENT_RECEIVE_COMMAND(PACKET_CONTENT_CLIENT_INFO_LIST);
DEFINE_UNAVAILABLE_CONTENT_RECEIVE_COMMAND(PACKET_CONTENT_CLIENT_INFO_ID);
DEFINE_UNAVAILABLE_CONTENT_RECEIVE_COMMAND(PACKET_CONTENT_CLIENT_INFO_EXTID);
DEFINE_UNAVAILABLE_CONTENT_RECEIVE_COMMAND(PACKET_CONTENT_CLIENT_INFO_EXTID_MD5);
DEFINE_UNAVAILABLE_CONTENT_RECEIVE_COMMAND(PACKET_CONTENT_SERVER_INFO);
DEFINE_UNAVAILABLE_CONTENT_RECEIVE_COMMAND(PACKET_CONTENT_CLIENT_CONTENT);
DEFINE_UNAVAILABLE_CONTENT_RECEIVE_COMMAND(PACKET_CONTENT_SERVER_CONTENT);
#endif /* ENABLE_NETWORK */
|
