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//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
//
// copyright : (C) 2014 Eran Ifrah
// file name : clindexerprotocol.cpp
//
// -------------------------------------------------------------------------
// A
// _____ _ _ _ _
// / __ \ | | | | (_) |
// | / \/ ___ __| | ___| | _| |_ ___
// | | / _ \ / _ |/ _ \ | | | __/ _ )
// | \__/\ (_) | (_| | __/ |___| | || __/
// \____/\___/ \__,_|\___\_____/_|\__\___|
//
// F i l e
//
// 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.
//
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
#include "clindexerprotocol.h"
#include <memory>
#include <stdio.h>
#include <sstream>
#define ACK_MAGIC 1975
class CharDeleter
{
char* m_ptr;
public:
CharDeleter(char* p)
: m_ptr(p)
{
}
~CharDeleter()
{
if(m_ptr) {
delete[] m_ptr;
m_ptr = NULL;
}
}
};
clIndexerProtocol::clIndexerProtocol() {}
clIndexerProtocol::~clIndexerProtocol() {}
bool clIndexerProtocol::ReadReply(clNamedPipe* conn, clIndexerReply& reply, std::string& errmsg)
{
// first we read sizeof(size_t) to get the actual data size
size_t buff_len(0);
size_t actual_read(0);
if(!conn->read((void*)&buff_len, sizeof(buff_len), &actual_read, 10000)) {
std::stringstream ss;
ss << "ERROR: ReadReply: Failed to read from the pipe, reason: " << conn->getLastError();
errmsg = ss.str();
return false;
}
if(actual_read != sizeof(buff_len)) {
std::stringstream ss;
ss << "ERROR: ReadReply: Protocol error: expected" << (sizeof(buff_len)) << "bytes, got: " << (int)actual_read
<< " reason: " << conn->getLastError();
errmsg = ss.str();
return false;
}
if((buff_len / (1024 * 1024)) > 15) {
// Dont read buffers larger than 15MB...
errmsg = "Buffer size is larger than 15MB";
return false;
}
char* data = new char[buff_len];
CharDeleter deleter(data);
int bytes_left(buff_len);
size_t bytes_read(0);
while(bytes_left > 0) {
if(!conn->read(data + bytes_read, bytes_left, &actual_read, 10000)) {
std::stringstream ss;
ss << "ERROR: Protocol error: expected " << buff_len << " bytes, got " << actual_read;
return false;
}
bytes_left -= actual_read;
bytes_read += actual_read;
}
reply.fromBinary(data);
return true;
}
bool clIndexerProtocol::ReadRequest(clNamedPipe* conn, clIndexerRequest& req)
{
// first we read sizeof(size_t) to get the actual data size
size_t buff_len(0);
size_t actual_read(0);
if(!conn->read((void*)&buff_len, sizeof(buff_len), &actual_read, -1)) {
fprintf(stderr, "ERROR: Failed to read from the pipe, reason: %d\n", conn->getLastError());
return false;
}
if(actual_read != sizeof(buff_len)) {
fprintf(stderr, "ERROR: Protocol error: expected %u bytes, got %u\n", (unsigned int)sizeof(buff_len),
(unsigned int)actual_read);
return false;
}
if(buff_len == 0) return false;
char* data = new char[buff_len];
CharDeleter deleter(data);
int bytes_left(buff_len);
size_t bytes_read(0);
while(bytes_left > 0) {
if(!conn->read(data + bytes_read, bytes_left, &actual_read, -1)) {
fprintf(stderr, "ERROR: [%s] Protocol error: expected %u bytes, got %u\n", __PRETTY_FUNCTION__,
(unsigned int)buff_len, (unsigned int)actual_read);
return false;
}
bytes_left -= actual_read;
bytes_read += actual_read;
}
req.fromBinary(data);
return true;
}
bool clIndexerProtocol::SendReply(clNamedPipe* conn, clIndexerReply& reply)
{
size_t buff_size(0);
char* data = reply.toBinary(buff_size);
CharDeleter deleter(data);
// send the reply size
size_t written(0);
conn->write((void*)&buff_size, sizeof(buff_size), &written, -1);
int bytes_left(buff_size);
int bytes_to_write(0);
int bytes_written(0);
while(bytes_left > 0) {
// we write in chunks of 3000 bytes
if(bytes_left < 3000) {
bytes_to_write = bytes_left;
} else {
bytes_to_write = 3000;
}
size_t actual_written(0);
if(!conn->write(data + bytes_written, bytes_to_write, &actual_written, -1)) {
return false;
}
bytes_left -= actual_written;
bytes_written += actual_written;
}
// the above problem does not exist under Windows' NamedPipes
return true;
}
bool clIndexerProtocol::SendRequest(clNamedPipe* conn, clIndexerRequest& req)
{
size_t size(0);
size_t written(0);
char* data = req.toBinary(size);
CharDeleter deleter(data);
// write request
if(!conn->write((void*)&size, sizeof(size), &written, -1)) {
printf("ERROR: [%s] protocol error: rc %d\n", __PRETTY_FUNCTION__, conn->getLastError());
return false;
}
int bytes_left(size);
int bytes_to_write(0);
int bytes_written(0);
while(bytes_left > 0) {
// we write in chunks of 3000 bytes
if(bytes_left < 3000) {
bytes_to_write = bytes_left;
} else {
bytes_to_write = 3000;
}
size_t actual_written(0);
if(!conn->write(data + bytes_written, bytes_to_write, &actual_written, -1)) {
return false;
}
bytes_left -= actual_written;
bytes_written += actual_written;
}
return true;
}
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