mirror of https://github.com/Icinga/icinga2.git
131 lines
4.1 KiB
C++
131 lines
4.1 KiB
C++
/******************************************************************************
|
|
* Icinga 2 *
|
|
* Copyright (C) 2012-2014 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
|
|
*/
|
|
bool NetString::ReadStringFromStream(const Stream::Ptr& stream, String *str)
|
|
{
|
|
/* 16 bytes are enough for the header */
|
|
const size_t header_length = 16;
|
|
size_t read_length;
|
|
char *header = static_cast<char *>(malloc(header_length));
|
|
|
|
if (header == NULL)
|
|
BOOST_THROW_EXCEPTION(std::bad_alloc());
|
|
|
|
read_length = 0;
|
|
|
|
while (read_length < header_length) {
|
|
/* Read one byte. */
|
|
int rc = stream->Read(header + read_length, 1);
|
|
|
|
if (rc == 0) {
|
|
if (read_length == 0) {
|
|
free(header);
|
|
return false;
|
|
}
|
|
|
|
BOOST_THROW_EXCEPTION(std::runtime_error("Read() failed."));
|
|
}
|
|
|
|
ASSERT(rc == 1);
|
|
|
|
read_length++;
|
|
|
|
if (header[read_length - 1] == ':') {
|
|
break;
|
|
} else if (header_length == read_length) {
|
|
free(header);
|
|
BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid NetString (missing :)"));
|
|
}
|
|
}
|
|
|
|
/* no leading zeros allowed */
|
|
if (header[0] == '0' && isdigit(header[1])) {
|
|
free(header);
|
|
BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid NetString (leading zero)"));
|
|
}
|
|
|
|
size_t len, i;
|
|
|
|
len = 0;
|
|
for (i = 0; i < read_length && isdigit(header[i]); i++) {
|
|
/* length specifier must have at most 9 characters */
|
|
if (i >= 9) {
|
|
free(header);
|
|
BOOST_THROW_EXCEPTION(std::invalid_argument("Length specifier must not exceed 9 characters"));
|
|
}
|
|
|
|
len = len * 10 + (header[i] - '0');
|
|
}
|
|
|
|
free(header);
|
|
|
|
/* read the whole message */
|
|
size_t data_length = len + 1;
|
|
|
|
char *data = static_cast<char *>(malloc(data_length));
|
|
|
|
if (data == NULL) {
|
|
BOOST_THROW_EXCEPTION(std::bad_alloc());
|
|
}
|
|
|
|
size_t rc = stream->Read(data, data_length);
|
|
|
|
if (rc != data_length)
|
|
BOOST_THROW_EXCEPTION(std::runtime_error("Read() failed."));
|
|
|
|
if (data[len] != ',')
|
|
BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid NetString (missing ,)"));
|
|
|
|
*str = String(&data[0], &data[len]);
|
|
|
|
free(data);
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* 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());
|
|
}
|