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* 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.h Basic functions to receive and send TCP packets to/from the content server.
*/
#ifndef NETWORK_CORE_TCP_CONTENT_H
#define NETWORK_CORE_TCP_CONTENT_H
#include "os_abstraction.h"
#include "tcp.h"
#include "packet.h"
#include "../../debug.h"
/** The values in the enum are important; they are used as database 'keys' */
enum ContentType {
CONTENT_TYPE_BEGIN = 1, ///< Helper to mark the begin of the types
CONTENT_TYPE_BASE_GRAPHICS = 1, ///< The content consists of base graphics
CONTENT_TYPE_NEWGRF = 2, ///< The content consists of a NewGRF
CONTENT_TYPE_AI = 3, ///< The content consists of an AI
CONTENT_TYPE_AI_LIBRARY = 4, ///< The content consists of an AI library
CONTENT_TYPE_SCENARIO = 5, ///< The content consists of a scenario
CONTENT_TYPE_HEIGHTMAP = 6, ///< The content consists of a heightmap
CONTENT_TYPE_BASE_SOUNDS = 7, ///< The content consists of base sounds
CONTENT_TYPE_BASE_MUSIC = 8, ///< The content consists of base music
CONTENT_TYPE_GAME = 9, ///< The content consists of a game script
CONTENT_TYPE_GAME_LIBRARY = 10, ///< The content consists of a GS library
CONTENT_TYPE_END, ///< Helper to mark the end of the types
};
/** Enum with all types of TCP content packets. The order MUST not be changed **/
enum PacketContentType {
PACKET_CONTENT_CLIENT_INFO_LIST, ///< Queries the content server for a list of info of a given content type
PACKET_CONTENT_CLIENT_INFO_ID, ///< Queries the content server for information about a list of internal IDs
PACKET_CONTENT_CLIENT_INFO_EXTID, ///< Queries the content server for information about a list of external IDs
PACKET_CONTENT_CLIENT_INFO_EXTID_MD5, ///< Queries the content server for information about a list of external IDs and MD5
PACKET_CONTENT_SERVER_INFO, ///< Reply of content server with information about content
PACKET_CONTENT_CLIENT_CONTENT, ///< Request a content file given an internal ID
PACKET_CONTENT_SERVER_CONTENT, ///< Reply with the content of the given ID
PACKET_CONTENT_END, ///< Must ALWAYS be on the end of this list!! (period)
};
/** Unique identifier for the content. */
enum ContentID {
INVALID_CONTENT_ID = UINT32_MAX, ///< Sentinel for invalid content.
};
/** Container for all important information about a piece of content. */
struct ContentInfo {
/** The state the content can be in. */
enum State {
UNSELECTED, ///< The content has not been selected
SELECTED, ///< The content has been manually selected
AUTOSELECTED, ///< The content has been selected as dependency
ALREADY_HERE, ///< The content is already at the client side
DOES_NOT_EXIST, ///< The content does not exist in the content system
INVALID, ///< The content's invalid
};
ContentType type; ///< Type of content
ContentID id; ///< Unique (server side) ID for the content
uint32 filesize; ///< Size of the file
char filename[48]; ///< Filename (for the .tar.gz; only valid on download)
char name[32]; ///< Name of the content
char version[16]; ///< Version of the content
char url[96]; ///< URL related to the content
char description[512]; ///< Description of the content
uint32 unique_id; ///< Unique ID; either GRF ID or shortname
byte md5sum[16]; ///< The MD5 checksum
uint8 dependency_count; ///< Number of dependencies
ContentID *dependencies; ///< Malloced array of dependencies (unique server side ids)
uint8 tag_count; ///< Number of tags
char (*tags)[32]; ///< Malloced array of tags (strings)
State state; ///< Whether the content info is selected (for download)
bool upgrade; ///< This item is an upgrade
ContentInfo();
~ContentInfo();
void TransferFrom(ContentInfo *other);
size_t Size() const;
bool IsSelected() const;
bool IsValid() const;
#ifndef OPENTTD_MSU
const char *GetTextfile(TextfileType type) const;
#endif /* OPENTTD_MSU */
};
/** Base socket handler for all Content TCP sockets */
class NetworkContentSocketHandler : public NetworkTCPSocketHandler {
protected:
NetworkAddress client_addr; ///< The address we're connected to.
void Close() override;
bool ReceiveInvalidPacket(PacketContentType type);
/**
* Client requesting a list of content info:
* byte type
* uint32 openttd version
* @param p The packet that was just received.
* @return True upon success, otherwise false.
*/
virtual bool Receive_CLIENT_INFO_LIST(Packet *p);
/**
* Client requesting a list of content info:
* uint16 count of ids
* uint32 id (count times)
* @param p The packet that was just received.
* @return True upon success, otherwise false.
*/
virtual bool Receive_CLIENT_INFO_ID(Packet *p);
/**
* Client requesting a list of content info based on an external
* 'unique' id; GRF ID for NewGRFS, shortname and for base
* graphics and AIs.
* Scenarios and AI libraries are not supported
* uint8 count of requests
* for each request:
* uint8 type
* unique id (uint32)
* @param p The packet that was just received.
* @return True upon success, otherwise false.
*/
virtual bool Receive_CLIENT_INFO_EXTID(Packet *p);
/**
* Client requesting a list of content info based on an external
* 'unique' id; GRF ID + MD5 checksum for NewGRFS, shortname and
* xor-ed MD5 checksums for base graphics and AIs.
* Scenarios and AI libraries are not supported
* uint8 count of requests
* for each request:
* uint8 type
* unique id (uint32)
* md5 (16 bytes)
* @param p The packet that was just received.
* @return True upon success, otherwise false.
*/
virtual bool Receive_CLIENT_INFO_EXTID_MD5(Packet *p);
/**
* Server sending list of content info:
* byte type (invalid ID == does not exist)
* uint32 id
* uint32 file_size
* string name (max 32 characters)
* string version (max 16 characters)
* uint32 unique id
* uint8 md5sum (16 bytes)
* uint8 dependency count
* uint32 unique id of dependency (dependency count times)
* uint8 tag count
* string tag (max 32 characters for tag count times)
* @param p The packet that was just received.
* @return True upon success, otherwise false.
*/
virtual bool Receive_SERVER_INFO(Packet *p);
/**
* Client requesting the actual content:
* uint16 count of unique ids
* uint32 unique id (count times)
* @param p The packet that was just received.
* @return True upon success, otherwise false.
*/
virtual bool Receive_CLIENT_CONTENT(Packet *p);
/**
* Server sending list of content info:
* uint32 unique id
* uint32 file size (0 == does not exist)
* string file name (max 48 characters)
* After this initial packet, packets with the actual data are send using
* the same packet type.
* @param p The packet that was just received.
* @return True upon success, otherwise false.
*/
virtual bool Receive_SERVER_CONTENT(Packet *p);
bool HandlePacket(Packet *p);
public:
/**
* Create a new cs socket handler for a given cs
* @param s the socket we are connected with
* @param address IP etc. of the client
*/
NetworkContentSocketHandler(SOCKET s = INVALID_SOCKET, const NetworkAddress &address = NetworkAddress()) :
NetworkTCPSocketHandler(s),
client_addr(address)
{
}
/** On destructing of this class, the socket needs to be closed */
virtual ~NetworkContentSocketHandler() { this->Close(); }
bool ReceivePackets();
};
#ifndef OPENTTD_MSU
Subdirectory GetContentInfoSubDir(ContentType type);
#endif /* OPENTTD_MSU */
#endif /* NETWORK_CORE_TCP_CONTENT_H */
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