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#ifndef _TCP_HELPERS_H_
#define _TCP_HELPERS_H_
#ifdef _WINDOWS
#include <winsock2.h>
#include <Ws2tcpip.h>
#else
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define SOCKET int
#define SOCKET_ERROR -1
#endif
#include <glib.h>
#include <stdexcept>
class TCP_socket
{
SOCKET sock;
TCP_socket(SOCKET s) : sock(s) {}
friend class TCP_listener;
public:
TCP_socket(const char *host, unsigned short port)
{
sockaddr_in addr;
memset(&addr, 0, sizeof(addr));
addr.sin_family= AF_INET;
addr.sin_addr.s_addr= inet_addr(host);
addr.sin_port= htons(port);
sock= socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(connect(sock, (sockaddr *) &addr, sizeof(addr)) == SOCKET_ERROR)
{
char itoabuf[16];
sprintf(itoabuf, "%i", port);
throw std::logic_error(
std::string("TCP_socket: connect error host: ")
.append(host)
.append(" port: ")
.append(itoabuf)
.c_str());
}
}
~TCP_socket()
{
::closesocket(sock);
}
int send(const char *buf, int len)
{
int result= ::send(sock, buf, len, 0);
if(result == SOCKET_ERROR)
{
throw std::logic_error(
std::string("TCP_socket: data send error")
);
}
return result;
}
int send(const std::wstring& str)
{
glong bytes_written= 0;
gchar* cbuf= g_utf16_to_utf8((const unsigned short *)str.data(),
str.length(), NULL, &bytes_written, NULL);
glong bytes_written_n= htonl(bytes_written);
int retval=
send((const char *)&bytes_written_n, sizeof(bytes_written_n))
+ send(cbuf, bytes_written);
g_free(cbuf);
return retval;
}
int recv(char *buf, int len)
{
int result= ::recv(sock, buf, len, 0);
if(result == SOCKET_ERROR)
{
throw std::logic_error(
std::string("TCP_socket: data recv error")
);
}
return result;
}
void recv(std::wstring& str)
{
glong bytes_to_read_n= 0;
recv((char *)&bytes_to_read_n, sizeof(bytes_to_read_n));
glong bytes_to_read= ntohl(bytes_to_read_n);
gchar *cbuf= (gchar *)g_malloc(bytes_to_read);
recv(cbuf, bytes_to_read);
glong items_written= 0;
gunichar2* c2= g_utf8_to_utf16(cbuf, bytes_to_read, NULL,
&items_written, NULL);
str.append((const wchar_t*)c2, items_written);
g_free(cbuf);
g_free(c2);
}
};
class TCP_listener
{
SOCKET sock;
public:
TCP_listener(const char *addr_string, unsigned short port)
{
sock= socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
sockaddr_in addr;
memset(&addr, 0, sizeof(addr));
addr.sin_family= AF_INET;
addr.sin_addr.s_addr= inet_addr(addr_string);
addr.sin_port= htons(port);
if(::bind(sock, (sockaddr *) &addr, sizeof(addr)) == SOCKET_ERROR)
{
throw std::logic_error(
std::string("TCP_listener: socket bind error")
);
}
if(::listen(sock, SOMAXCONN) == SOCKET_ERROR)
{
throw std::logic_error(
std::string("TCP_listener: listen error")
);
}
}
~TCP_listener()
{
::closesocket(sock);
}
TCP_socket *listen()
{
SOCKET newsock= SOCKET_ERROR;
do
{
newsock= accept(sock, NULL, 0);
}
while(newsock == SOCKET_ERROR);
return new TCP_socket(newsock);
}
};
#endif // _TCP_HELPERS_H_
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