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// ---------------------------------------------------------------------------80
// ICQ plugin for Miranda Instant Messenger
// ________________________________________
//
// Copyright © 2000,2001 Richard Hughes, Roland Rabien, Tristan Van de Vreede
// Copyright © 2001,2002 Jon Keating, Richard Hughes
// Copyright © 2002,2003,2004 Martin Öberg, Sam Kothari, Robert Rainwater
// Copyright © 2004,2005,2006 Joe Kucera
// Copyright © 2012-2018 Miranda NG team
//
// 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, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// -----------------------------------------------------------------------------
// DESCRIPTION:
//
// HTTP Gateway Handling routines
// -----------------------------------------------------------------------------
#include "stdafx.h"
int icq_httpGatewayInit(HNETLIBCONN hConn, NETLIBOPENCONNECTION*, NETLIBHTTPREQUEST *nlhr)
{
// initial response from ICQ http gateway
size_t wLen, wVersion, wType;
WORD wIpLen;
DWORD dwSid1, dwSid2, dwSid3, dwSid4;
BYTE *buf;
char szSid[33], szHttpServer[256], szHttpGetUrl[300], szHttpPostUrl[300];
if (nlhr->dataLength < 31)
{
SetLastError(ERROR_INVALID_DATA);
return 0;
}
buf = (PBYTE)nlhr->pData;
unpackWord(&buf, &wLen);
unpackWord(&buf, &wVersion); /* always 0x0443 */
unpackWord(&buf, &wType); /* hello reply */
buf += 6; /* dunno */
unpackDWord(&buf, &dwSid1);
unpackDWord(&buf, &dwSid2);
unpackDWord(&buf, &dwSid3);
unpackDWord(&buf, &dwSid4);
mir_snprintf(szSid, "%08x%08x%08x%08x", dwSid1, dwSid2, dwSid3, dwSid4);
unpackWord(&buf, &wIpLen);
if(nlhr->dataLength < 30 + wIpLen || wIpLen == 0 || wIpLen > sizeof(szHttpServer) - 1)
{
SetLastError(ERROR_INVALID_DATA);
return 0;
}
SetGatewayIndex(hConn, 1); // new master connection begins here
memcpy(szHttpServer, buf, wIpLen);
szHttpServer[wIpLen] = '\0';
NETLIBHTTPPROXYINFO nlhpi = {};
nlhpi.flags = NLHPIF_USEPOSTSEQUENCE;
nlhpi.szHttpGetUrl = szHttpGetUrl;
nlhpi.szHttpPostUrl = szHttpPostUrl;
nlhpi.firstPostSequence = 1;
mir_snprintf(szHttpGetUrl, "http://%s/monitor?sid=%s", szHttpServer, szSid);
mir_snprintf(szHttpPostUrl, "http://%s/data?sid=%s&seq=", szHttpServer, szSid);
return Netlib_SetHttpProxyInfo(hConn, &nlhpi);
}
int icq_httpGatewayBegin(HNETLIBCONN hConn, NETLIBOPENCONNECTION* nloc)
{ // open our "virual data connection"
icq_packet packet;
size_t serverNameLen;
serverNameLen = mir_strlen(nloc->szHost);
packet.wLen = (WORD)(serverNameLen + 4);
write_httphdr(&packet, HTTP_PACKETTYPE_LOGIN, GetGatewayIndex(hConn));
packWord(&packet, (WORD)serverNameLen);
packBuffer(&packet, (LPBYTE)nloc->szHost, serverNameLen);
packWord(&packet, nloc->wPort);
INT_PTR res = Netlib_Send(hConn, (char*)packet.pData, packet.wLen, MSG_DUMPPROXY|MSG_NOHTTPGATEWAYWRAP);
SAFE_FREE((void**)&packet.pData);
return res != SOCKET_ERROR;
}
int icq_httpGatewayWrapSend(HNETLIBCONN hConn, PBYTE buf, int len, int flags)
{
PBYTE sendBuf = buf;
int sendLen = len;
int sendResult = 0;
while (sendLen > 0)
{ // imitate polite behaviour of icq5.1 and split large packets
icq_packet packet;
WORD curLen;
int curResult;
if (sendLen > 512) curLen = 512; else curLen = (WORD)sendLen;
// send wrapped data
packet.wLen = curLen;
write_httphdr(&packet, HTTP_PACKETTYPE_FLAP, GetGatewayIndex(hConn));
packBuffer(&packet, sendBuf, curLen);
curResult = Netlib_Send(hConn, (char*)packet.pData, packet.wLen, flags);
SAFE_FREE((void**)&packet.pData);
// sending failed, end loop
if (curResult <= 0)
return curResult;
// calculare real number of data bytes sent
if (curResult > 14) sendResult += curResult - 14;
// move on
sendLen -= curLen;
sendBuf += curLen;
}
return sendResult;
}
PBYTE icq_httpGatewayUnwrapRecv(NETLIBHTTPREQUEST*, PBYTE buf, int len, int* outBufLen, void *(*)(void *, size_t))
{
size_t wLen, wType;
DWORD dwPackSeq;
PBYTE tbuf;
size_t i = 0;
tbuf = buf;
for(;;)
{
if (tbuf - buf + 2 > len)
break;
unpackWord(&tbuf, &wLen);
if (wLen < 12)
break;
if (tbuf - buf + wLen > (size_t)len)
break;
tbuf += 2; /* version */
unpackWord(&tbuf, &wType);
tbuf += 4; /* flags */
unpackDWord(&tbuf, &dwPackSeq);
if (wType == HTTP_PACKETTYPE_FLAP)
{ // it is normal data packet
size_t copyBytes = wLen - 12;
if (copyBytes > len - i)
{
/* invalid data - do our best to get something out of it */
copyBytes = len - i;
}
memcpy(buf + i, tbuf, copyBytes);
i += copyBytes;
}
else if (wType == HTTP_PACKETTYPE_LOGINREPLY)
{ // our "virtual connection" was established, good
BYTE bRes;
unpackByte(&tbuf, &bRes);
wLen -= 1;
if (!bRes)
Netlib_Logf( nullptr, "Gateway Connection #%d Established.", dwPackSeq);
else
Netlib_Logf( nullptr, "Gateway Connection #%d Failed, error: %d", dwPackSeq, bRes);
}
else if (wType == HTTP_PACKETTYPE_CLOSEREPLY)
{ // "virtual connection" closed - only received if any other "virual connection" still active
Netlib_Logf( nullptr, "Gateway Connection #%d Closed.", dwPackSeq);
}
tbuf += wLen - 12;
}
*outBufLen = (int)i;
return buf;
}
int icq_httpGatewayWalkTo(HNETLIBCONN hConn, NETLIBOPENCONNECTION* nloc)
{ // this is bad simplification - for avatars to work we need to handle
// two "virtual connections" at the same time
icq_packet packet;
DWORD dwGatewaySeq = GetGatewayIndex(hConn);
packet.wLen = 0;
write_httphdr(&packet, HTTP_PACKETTYPE_CLOSE, dwGatewaySeq);
Netlib_Send(hConn, (char*)packet.pData, packet.wLen, MSG_DUMPPROXY|MSG_NOHTTPGATEWAYWRAP);
// we closed virtual connection, open new one
dwGatewaySeq++;
SetGatewayIndex(hConn, dwGatewaySeq);
return icq_httpGatewayBegin(hConn, nloc);
}
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