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/* $Id$ */
/*
* 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"
/** Clear everything in the struct */
ContentInfo::ContentInfo()
{
memset(this, 0, sizeof(*this));
}
/** Free everything allocated */
ContentInfo::~ContentInfo()
{
free(this->dependencies);
free(this->tags);
}
/**
* Copy data from other #ContentInfo and take ownership of allocated stuff.
* @param other Source to copy from. #dependencies and #tags will be NULLed.
*/
void ContentInfo::TransferFrom(ContentInfo *other)
{
if (other != this) {
free(this->dependencies);
free(this->tags);
memcpy(this, other, sizeof(ContentInfo));
other->dependencies = NULL;
other->tags = NULL;
}
}
/**
* Get the size of the data as send over the network.
* @return the size.
*/
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;
}
/**
* Is the state either selected or autoselected?
* @return true iff that's the case
*/
bool ContentInfo::IsSelected() const
{
switch (this->state) {
case ContentInfo::SELECTED:
case ContentInfo::AUTOSELECTED:
case ContentInfo::ALREADY_HERE:
return true;
default:
return false;
}
}
/**
* Is the information from this content info valid?
* @return true iff it's valid
*/
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 the given packet, i.e. pass it to the right
* parser receive command.
* @param p the packet to handle
* @return true if we should immediately handle further packets, false otherwise
*/
bool NetworkContentSocketHandler::HandlePacket(Packet *p)
{
PacketContentType type = (PacketContentType)p->Recv_uint8();
switch (this->HasClientQuit() ? PACKET_CONTENT_END : type) {
case PACKET_CONTENT_CLIENT_INFO_LIST: return this->Receive_CLIENT_INFO_LIST(p);
case PACKET_CONTENT_CLIENT_INFO_ID: return this->Receive_CLIENT_INFO_ID(p);
case PACKET_CONTENT_CLIENT_INFO_EXTID: return this->Receive_CLIENT_INFO_EXTID(p);
case PACKET_CONTENT_CLIENT_INFO_EXTID_MD5: return this->Receive_CLIENT_INFO_EXTID_MD5(p);
case PACKET_CONTENT_SERVER_INFO: return this->Receive_SERVER_INFO(p);
case PACKET_CONTENT_CLIENT_CONTENT: return this->Receive_CLIENT_CONTENT(p);
case PACKET_CONTENT_SERVER_CONTENT: return this->Receive_SERVER_CONTENT(p);
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 TCP level
*/
void NetworkContentSocketHandler::ReceivePackets()
{
Packet *p;
while ((p = this->ReceivePacket()) != NULL) {
bool cont = this->HandlePacket(p);
delete p;
if (!cont) return;
}
}
/**
* Helper for logging receiving invalid packets.
* @param type The received packet type.
* @return Always false, as it's an error.
*/
bool NetworkContentSocketHandler::ReceiveInvalidPacket(PacketContentType type)
{
DEBUG(net, 0, "[tcp/content] received illegal packet type %d from %s", type, this->client_addr.GetAddressAsString());
return false;
}
bool NetworkContentSocketHandler::Receive_CLIENT_INFO_LIST(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CONTENT_CLIENT_INFO_LIST); }
bool NetworkContentSocketHandler::Receive_CLIENT_INFO_ID(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CONTENT_CLIENT_INFO_ID); }
bool NetworkContentSocketHandler::Receive_CLIENT_INFO_EXTID(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CONTENT_CLIENT_INFO_EXTID); }
bool NetworkContentSocketHandler::Receive_CLIENT_INFO_EXTID_MD5(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CONTENT_CLIENT_INFO_EXTID_MD5); }
bool NetworkContentSocketHandler::Receive_SERVER_INFO(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CONTENT_SERVER_INFO); }
bool NetworkContentSocketHandler::Receive_CLIENT_CONTENT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CONTENT_CLIENT_CONTENT); }
bool NetworkContentSocketHandler::Receive_SERVER_CONTENT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CONTENT_SERVER_CONTENT); }
#endif /* ENABLE_NETWORK */
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