mirror of https://github.com/Icinga/icinga2.git
118 lines
3.9 KiB
C++
118 lines
3.9 KiB
C++
/******************************************************************************
|
|
* Icinga 2 *
|
|
* Copyright (C) 2012-2015 Icinga Development Team (http://www.icinga.org) *
|
|
* *
|
|
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
|
|
******************************************************************************/
|
|
|
|
#include "base/netstring.hpp"
|
|
#include "base/debug.hpp"
|
|
#include <sstream>
|
|
|
|
using namespace icinga;
|
|
|
|
/**
|
|
* Reads data from a stream in netstring format.
|
|
*
|
|
* @param stream The stream to read from.
|
|
* @param[out] str The String that has been read from the IOQueue.
|
|
* @returns true if a complete String was read from the IOQueue, false otherwise.
|
|
* @exception invalid_argument The input stream is invalid.
|
|
* @see https://github.com/PeterScott/netstring-c/blob/master/netstring.c
|
|
*/
|
|
StreamReadStatus NetString::ReadStringFromStream(const Stream::Ptr& stream, String *str, StreamReadContext& context)
|
|
{
|
|
if (context.Eof)
|
|
return StatusEof;
|
|
|
|
if (context.MustRead) {
|
|
if (!context.FillFromStream(stream)) {
|
|
context.Eof = true;
|
|
return StatusEof;
|
|
}
|
|
|
|
context.MustRead = false;
|
|
}
|
|
|
|
size_t header_length = 0;
|
|
|
|
for (size_t i = 0; i < context.Size; i++) {
|
|
if (context.Buffer[i] == ':') {
|
|
header_length = i;
|
|
|
|
/* make sure there's a header */
|
|
if (header_length == 0)
|
|
BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid NetString (no length specifier)"));
|
|
|
|
break;
|
|
} else if (i > 16)
|
|
BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid NetString (missing :)"));
|
|
}
|
|
|
|
if (header_length == 0) {
|
|
context.MustRead = true;
|
|
return StatusNeedData;
|
|
}
|
|
|
|
/* no leading zeros allowed */
|
|
if (context.Buffer[0] == '0' && isdigit(context.Buffer[1]))
|
|
BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid NetString (leading zero)"));
|
|
|
|
size_t len, i;
|
|
|
|
len = 0;
|
|
for (i = 0; i < header_length && isdigit(context.Buffer[i]); i++) {
|
|
/* length specifier must have at most 9 characters */
|
|
if (i >= 9)
|
|
BOOST_THROW_EXCEPTION(std::invalid_argument("Length specifier must not exceed 9 characters"));
|
|
|
|
len = len * 10 + (context.Buffer[i] - '0');
|
|
}
|
|
|
|
/* read the whole message */
|
|
size_t data_length = len + 1;
|
|
|
|
char *data = context.Buffer + header_length + 1;
|
|
|
|
if (context.Size < header_length + 1 + data_length) {
|
|
context.MustRead = true;
|
|
return StatusNeedData;
|
|
}
|
|
|
|
if (data[len] != ',')
|
|
BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid NetString (missing ,)"));
|
|
|
|
*str = String(&data[0], &data[len]);
|
|
|
|
context.DropData(header_length + 1 + len + 1);
|
|
|
|
return StatusNewItem;
|
|
}
|
|
|
|
/**
|
|
* Writes data into a stream using the netstring format.
|
|
*
|
|
* @param stream The stream.
|
|
* @param str The String that is to be written.
|
|
*/
|
|
void NetString::WriteStringToStream(const Stream::Ptr& stream, const String& str)
|
|
{
|
|
std::ostringstream msgbuf;
|
|
msgbuf << str.GetLength() << ":" << str << ",";
|
|
|
|
String msg = msgbuf.str();
|
|
stream->Write(msg.CStr(), msg.GetLength());
|
|
}
|