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/*
Miranda NG: the free IM client for Microsoft* Windows*
Copyright (C) 2012-24 Miranda NG team (https://miranda-ng.org),
Copyright (c) 2000-12 Miranda IM project,
all portions of this codebase are copyrighted to the people
listed in contributors.txt.
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.
*/
#include "stdafx.h"
#include "netlib.h"
#include "../../libs/zlib/src/zlib.h"
MIR_APP_DLL(MHttpResponse*) WebSocket_Connect(HNETLIBUSER nlu, const char *szHost, const MHttpHeaders *pHeaders)
{
CMStringA tmpHost(szHost);
// connect to the gateway server
if (!mir_strncmp(tmpHost, "wss://", 6))
tmpHost.Delete(0, 6);
auto *nlr = new MHttpRequest;
nlr->flags = NLHRF_PERSISTENT | NLHRF_HTTP11 | NLHRF_SSL;
nlr->m_szUrl = tmpHost.GetBuffer();
nlr->AddHeader("Accept", "*/*");
nlr->AddHeader("Upgrade", "websocket");
nlr->AddHeader("Pragma", "no-cache");
nlr->AddHeader("Cache-Control", "no-cache");
nlr->AddHeader("Connection", "keep-alive, Upgrade");
uint8_t binNonce[16];
Utils_GetRandom(binNonce, sizeof(binNonce));
nlr->AddHeader("Sec-WebSocket-Key", ptrA(mir_base64_encode(binNonce, sizeof(binNonce))));
nlr->AddHeader("Sec-WebSocket-Version", "13");
nlr->AddHeader("Sec-WebSocket-Extensions", "permessage-deflate; client_max_window_bits");
if (pHeaders)
for (auto &it: *pHeaders)
nlr->AddHeader(it->szName, it->szValue);
auto *pReply = Netlib_HttpTransaction(nlu, nlr);
delete nlr;
if (pReply == nullptr) {
Netlib_Logf(nlu, "Error establishing WebSocket connection to %s, send failed", tmpHost.c_str());
return nullptr;
}
if (pReply->resultCode != 101)
Netlib_Logf(nlu, "Error establishing WebSocket connection to %s, status %d", tmpHost.c_str(), pReply->resultCode);
return pReply;
}
MIR_APP_DLL(bool) WebSocket_InitHeader(WSHeader &hdr, const void *pData, size_t bufSize)
{
if (bufSize < 2)
return false;
auto *buf = (const uint8_t *)pData;
hdr.bIsFinal = (buf[0] & 0x80) != 0;
hdr.bIsMasked = (buf[1] & 0x80) != 0;
hdr.opCode = buf[0] & 0x0F;
hdr.firstByte = buf[1] & 0x7F;
hdr.headerSize = 2 + (hdr.firstByte == 0x7E ? 2 : 0) + (hdr.firstByte == 0x7F ? 8 : 0) + (hdr.bIsMasked ? 4 : 0);
if (bufSize < hdr.headerSize)
return false;
uint64_t tmpSize = 0;
switch (hdr.firstByte) {
case 0x7F:
tmpSize += ((uint64_t)buf[2]) << 56;
tmpSize += ((uint64_t)buf[3]) << 48;
tmpSize += ((uint64_t)buf[4]) << 40;
tmpSize += ((uint64_t)buf[5]) << 32;
tmpSize += ((uint64_t)buf[6]) << 24;
tmpSize += ((uint64_t)buf[7]) << 16;
tmpSize += ((uint64_t)buf[8]) << 8;
tmpSize += ((uint64_t)buf[9]);
break;
case 0x7E:
tmpSize += ((uint64_t)buf[2]) << 8;
tmpSize += ((uint64_t)buf[3]);
break;
default:
tmpSize = hdr.firstByte;
}
hdr.payloadSize = tmpSize;
return true;
}
/////////////////////////////////////////////////////////////////////////////////////////
static void WebSocket_Send(HNETLIBCONN nlc, const void *pData, size_t dataLen, uint8_t opCode)
{
uint8_t header[20];
size_t datalen;
header[0] = 0x80 + (opCode & 0x7F);
if (dataLen < 126) {
header[1] = (dataLen & 0xFF);
datalen = 2;
}
else if (dataLen < 65536) {
header[1] = 0x7E;
header[2] = (dataLen >> 8) & 0xFF;
header[3] = dataLen & 0xFF;
datalen = 4;
}
else {
header[1] = 0x7F;
header[2] = (dataLen >> 56) & 0xff;
header[3] = (dataLen >> 48) & 0xff;
header[4] = (dataLen >> 40) & 0xff;
header[5] = (dataLen >> 32) & 0xff;
header[6] = (dataLen >> 24) & 0xff;
header[7] = (dataLen >> 16) & 0xff;
header[8] = (dataLen >> 8) & 0xff;
header[9] = dataLen & 0xff;
datalen = 10;
}
union {
uint32_t dwMask;
uint8_t arMask[4];
};
dwMask = crc32(rand(), (uint8_t*)pData, (unsigned)dataLen);
memcpy(header + datalen, arMask, _countof(arMask));
datalen += _countof(arMask);
header[1] |= 0x80;
ptrA sendBuf((char*)mir_alloc(dataLen + datalen));
memcpy(sendBuf, header, datalen);
if (dataLen) {
memcpy(sendBuf.get() + datalen, pData, dataLen);
for (size_t i = 0; i < dataLen; i++)
sendBuf[i + datalen] ^= arMask[i & 3];
}
Netlib_Send(nlc, sendBuf, int(dataLen + datalen), MSG_NODUMP);
}
MIR_APP_DLL(void) WebSocket_SendText(HNETLIBCONN nlc, const char *pData)
{
if (nlc && pData)
WebSocket_Send(nlc, pData, strlen(pData), 1);
}
MIR_APP_DLL(void) WebSocket_SendBinary(HNETLIBCONN nlc, const void *pData, size_t dataLen)
{
if (nlc && pData)
WebSocket_Send(nlc, pData, dataLen, 2);
}
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