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/*
net/tcpconnection.h
This file is part of the Osirion project and is distributed under
the terms of the GNU General Public License version 2
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <assert.h>
#include <iostream>
#include "sys/sys.h"
#include "net/net.h"
#include "net/tcpconnection.h"
namespace net
{
TCPConnection::TCPConnection()
{
tcpconnection_error = false;
tcpconnection_fd = -1;
tcpconnection_port = 0;
}
TCPConnection::~TCPConnection()
{
disconnect();
}
std::string TCPConnection::host() const
{
return tcpconnection_host;
}
int TCPConnection::port() const
{
return tcpconnection_port;
}
bool TCPConnection::error() const
{
return tcpconnection_error;
}
bool TCPConnection::valid() const
{
return (tcpconnection_fd != -1);
}
bool TCPConnection::invalid() const
{
return (tcpconnection_fd == -1);
}
int TCPConnection::fd() const
{
return (tcpconnection_fd);
}
bool TCPConnection::connected()
{
return ((tcpconnection_fd != -1) && !tcpconnection_error);
}
void TCPConnection::abort()
{
tcpconnection_error= true;
}
void TCPConnection::disconnect()
{
if (tcpconnection_fd != -1)
close(tcpconnection_fd);
tcpconnection_fd = -1;
tcpconnection_error = false;
tcpconnection_host.clear();
tcpconnection_port = 0;
//con_debug << "Network disconnected from server" << std::endl;
}
void TCPConnection::connect(std::string const &to_host, int to_port)
{
if (valid())
return;
// resolve serverhostname
struct hostent *serverhostent;
serverhostent = gethostbyname(to_host.c_str());
if (!serverhostent) {
con_warn << "Could not resolve '" << to_host.c_str() << "'" << std::endl;
abort();
return;
}
con_print << "Connecting to " << inet_ntoa(*((struct in_addr *)serverhostent->h_addr)) << ":" << to_port << "..." << std::endl;
// Get a socket file descriptor
tcpconnection_fd = socket(PF_INET, SOCK_STREAM, 0);
if (tcpconnection_fd == -1) {
//con_error << "Network socket() failed!" << std::endl;
abort();
return;
}
// make the connection
struct sockaddr_in server_addr;
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(to_port);
server_addr.sin_addr.s_addr = inet_addr(inet_ntoa(*((struct in_addr *)serverhostent->h_addr)));
memset(server_addr.sin_zero, '\0', sizeof server_addr.sin_zero);
if (::connect(tcpconnection_fd, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) != 0) {
//con_error << "Network connect() failed!" << std::endl;
abort();
return;
}
tcpconnection_host = to_host;
tcpconnection_port = to_port;
tcpconnection_error = false;
//con_print << "Connected to server." << std::endl;
}
void TCPConnection::receive(std::string &msg)
{
if (error() || invalid())
return;
char recvbuf[FRAMESIZE]; // maximum block sizeq
size_t msglen = sizeof(recvbuf);
ssize_t bytes_received;
memset(recvbuf, '\0', sizeof(recvbuf));
bytes_received = ::recv(tcpconnection_fd, recvbuf, msglen, 0);
if (bytes_received == 0) {
con_print << "Disconnected.";
abort();
return;
} else if (bytes_received < 0) {
con_error << "Network receive() error!" << std::endl;
//perror("recv");
abort();
return;
}
msg = recvbuf;
}
void TCPConnection::send(std::string const &msg)
{
if (error() || invalid())
return;
if (msg.size() > FRAMESIZE) {
con_warn << "Network message exceeds " << FRAMESIZE << " bytes!\n";
return;
}
ssize_t bytes_sent = 0;
size_t total_sent = 0;
std::string sendbuf(msg);
while (total_sent < msg.size()) {
bytes_sent = ::send(tcpconnection_fd, sendbuf.c_str(), sendbuf.size(), 0);
if (bytes_sent < 0) {
con_error << "Network send() error!" << std::endl;
//perror("send");
abort();
return;
}
total_sent += bytes_sent;
// assert (bytes_sent <= sendbuf.size());
sendbuf.erase(sendbuf.size() - bytes_sent, bytes_sent);
}
return;
}
}
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