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/*
Plugin of Miranda IM for communicating with users of the AIM protocol.
Copyright (c) 2008-2009 Boris Krasnovskiy
Copyright (C) 2005-2006 Aaron Myles Landwehr
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 (at your option) 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 "stdafx.h"
void __cdecl CAimProto::aim_proxy_helper(void* param)
{
file_transfer *ft = (file_transfer*)param;
if (ft->requester)
{
if (proxy_initialize_send(ft->hConn, m_username, ft->icbm_cookie))
return;//error
}
else
{
if (proxy_initialize_recv(ft->hConn, m_username, ft->icbm_cookie, ft->port))
return;//error
}
//start listen for packets stuff
NETLIBPACKETRECVER packetRecv = {};
packetRecv.dwTimeout = INFINITE;
HANDLE hServerPacketRecver = Netlib_CreatePacketReceiver(ft->hConn, 2048 * 4);
for (;;)
{
int recvResult = Netlib_GetMorePackets(hServerPacketRecver, &packetRecv);
if (recvResult == 0)
{
ProtoBroadcastAck(ft->hContact, ACKTYPE_FILE, ACKRESULT_FAILED, ft, 0);
break;
}
if (recvResult == SOCKET_ERROR)
{
ProtoBroadcastAck(ft->hContact, ACKTYPE_FILE, ACKRESULT_FAILED, ft, 0);
break;
}
if (recvResult > 0)
{
unsigned short length = _htons(*(unsigned short*)&packetRecv.buffer[0]);
packetRecv.bytesUsed = length + 2;
unsigned short type = _htons(*(unsigned short*)&packetRecv.buffer[4]);
if (type == 0x0001)
{
unsigned short error = _htons(*(unsigned short*)&packetRecv.buffer[12]);
switch (error)
{
case 0x000D:
ShowPopup("Proxy Server File Transfer Error: Bad Request.", ERROR_POPUP);
break;
case 0x0010:
ShowPopup("Proxy Server File Transfer Error: Initial Request Timed Out.", ERROR_POPUP);
break;
case 0x001A:
ShowPopup("Proxy Server File Transfer Error: Accept Period Timed Out.", ERROR_POPUP);
break;
case 0x000e:
ShowPopup("Proxy Server File Transfer Error: Incorrect command syntax.", ERROR_POPUP);
break;
case 0x0016:
ShowPopup("Proxy Server File Transfer Error: Unknown command issued.", ERROR_POPUP);
break;
}
}
else if (type == 0x0003)
{
unsigned short port = _htons(*(unsigned short*)&packetRecv.buffer[12]);
unsigned long ip = _htonl(*(unsigned long*)&packetRecv.buffer[14]);
aim_send_file(m_hServerConn, m_seqno, ip, port, true, ft);
debugLogA("Stage %d Proxy ft and we are not the sender.", ft->req_num);
}
else if (type == 0x0005)
{
if (!ft->requester)
{
aim_file_ad(m_hServerConn, m_seqno, ft->sn, ft->icbm_cookie, false, ft->max_ver);
ft->accepted = true;
}
ProtoBroadcastAck(ft->hContact, ACKTYPE_FILE, ACKRESULT_CONNECTED, ft, 0);
int i;
for (i = 21; --i; )
{
if (Miranda_IsTerminated()) return;
Sleep(100);
if (ft->accepted) break;
}
if (i == 0)
{
ProtoBroadcastAck(ft->hContact, ACKTYPE_FILE, ACKRESULT_FAILED, ft, 0);
break;
}
packetRecv.dwTimeout = 350000;
int result;
if (ft->sending)//we are sending
result = sending_file(ft, hServerPacketRecver, packetRecv);
else
result = receiving_file(ft, hServerPacketRecver, packetRecv);
ProtoBroadcastAck(ft->hContact, ACKTYPE_FILE, result ? ACKRESULT_FAILED : ACKRESULT_SUCCESS, ft, 0);
break;
}
}
}
Netlib_CloseHandle(hServerPacketRecver);
Netlib_CloseHandle(ft->hConn);
m_ft_list.remove_by_ft(ft);
}
int proxy_initialize_send(HNETLIBCONN connection, char* sn, char* cookie)
{
const char sn_length = (char)mir_strlen(sn);
const int len = sn_length + 21 + TLV_HEADER_SIZE + AIM_CAPS_LENGTH;
char* buf= (char*)alloca(len);
unsigned short offset=0;
aim_writeshort(len-2, offset, buf);
aim_writegeneric(10, "\x04\x4a\0\x02\0\0\0\0\0\0", offset, buf);
aim_writechar((unsigned char)sn_length, offset, buf); // screen name len
aim_writegeneric(sn_length, sn, offset, buf); // screen name
aim_writegeneric(8, cookie, offset, buf); // icbm cookie
aim_writetlv(1, AIM_CAPS_LENGTH, AIM_CAP_FILE_TRANSFER, offset, buf);
return Netlib_Send(connection, buf, offset, 0) >= 0 ? 0 : -1;
}
int proxy_initialize_recv(HNETLIBCONN connection, char* sn, char* cookie, unsigned short port_check)
{
const char sn_length = (char)mir_strlen(sn);
const int len = sn_length + 23 + TLV_HEADER_SIZE + AIM_CAPS_LENGTH;
char* buf= (char*)alloca(len);
unsigned short offset=0;
aim_writeshort(len-2, offset, buf);
aim_writegeneric(10, "\x04\x4a\0\x04\0\0\0\0\0\0", offset, buf);
aim_writechar((unsigned char)sn_length, offset, buf); // screen name len
aim_writegeneric(sn_length, sn, offset, buf); // screen name
aim_writeshort(port_check, offset, buf);
aim_writegeneric(8, cookie, offset, buf); // icbm cookie
aim_writetlv(1, AIM_CAPS_LENGTH, AIM_CAP_FILE_TRANSFER, offset, buf);
return Netlib_Send(connection, buf, offset, 0) >= 0 ? 0 : -1;
}
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