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/* -*- mode: c++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* File: socket.cc
* This file belongs to the Bifrost project.
* Socket wrapper class implementation.
* Date: Wed Sep 2 09:02:38 CEST 2009
* Author: Bent Bisballe Nyeng
* Copyright: 2009
* Email: deva@aasimon.org
****************************************************************************/
#include "socket.h"
#include <stdlib.h>
#include <errno.h>
#ifdef WIN32
#include <ws2tcpip.h>
#include <WinSock2.h>
typedef signed int ssize_t;
#else
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#endif
#define ADDR_IS_MULTICAST(a) IN_MULTICAST(htonl(a))
struct socket_private_t {
bool close_socket;
socket_t sock;
struct sockaddr_in name;
struct ip_mreq mreq;
};
static void leave_group(socket_t sock, struct ip_mreq mreq)
{
int ret;
ret = setsockopt(sock, IPPROTO_IP, IP_DROP_MEMBERSHIP,
(const char*)&mreq, sizeof(mreq));
if (ret < 0) {
/*
fprintf(stderr, "Failed to leave multicast group.");
perror("");
*/
}
}
#ifdef WIN32
static void wsastartup()
{
WORD wVersionRequested = MAKEWORD(2, 0);
WSADATA wsaData;
int ret = WSAStartup(wVersionRequested, &wsaData);
if(ret != 0) throw Socket::WSAException();
}
#endif
Socket::Socket()
_throw(WSAException)
{
prv = new struct socket_private_t();
#ifdef WIN32
wsastartup();
#endif
prv->close_socket = false;
}
Socket::~Socket()
{
if(prv->close_socket) {
if (ADDR_IS_MULTICAST(prv->name.sin_addr.s_addr)) {
leave_group(prv->sock, prv->mreq);
}
#ifdef WIN32
closesocket(prv->sock);
WSACleanup();
#else
close(prv->sock);
#endif
}
if(prv) delete prv;
}
void Socket::open(std::string address, port_t port)
_throw(AddressParseException, OpenException)
{
prv->name.sin_family = AF_INET;
prv->sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if(prv->sock < 0) throw OpenException();
prv->name.sin_port = htons(port);
#ifdef WIN32
prv->name.sin_addr.S_un.S_addr = inet_addr(address.c_str());
if(INADDR_NONE == prv->name.sin_addr.S_un.S_addr) throw AddressParseException();
#else
prv->name.sin_addr.s_addr = inet_addr(address.c_str());
if(INADDR_NONE == prv->name.sin_addr.s_addr) throw AddressParseException();
#endif
prv->close_socket = true;
}
void Socket::setSocketFiledescriptor(socket_t sock, std::string address, port_t port)
_throw(AddressParseException)
{
prv->name.sin_family = AF_INET;
prv->sock = sock;
if(prv->sock < 0) throw OpenException();
prv->name.sin_port = htons(port);
#ifdef WIN32
prv->name.sin_addr.S_un.S_addr = inet_addr(address.c_str());
if(INADDR_NONE == prv->name.sin_addr.S_un.S_addr) throw AddressParseException();
#else
prv->name.sin_addr.s_addr = inet_addr(address.c_str());
if(INADDR_NONE == prv->name.sin_addr.s_addr) throw AddressParseException();
#endif
prv->close_socket = false;
}
void Socket::setSend(unsigned char ttl)
_throw(MulticastTTLException, MulticastGroupJoinException)
{
int ret;
if (ADDR_IS_MULTICAST(prv->name.sin_addr.s_addr)) {
ret = setsockopt(prv->sock, IPPROTO_IP, IP_MULTICAST_TTL,
(const char*)&ttl, sizeof(ttl));
if (ret < 0) throw MulticastTTLException();
prv->mreq.imr_multiaddr.s_addr = prv->name.sin_addr.s_addr;
prv->mreq.imr_interface.s_addr = htonl(INADDR_ANY);
ret = setsockopt(prv->sock, IPPROTO_IP, IP_ADD_MEMBERSHIP,
(const char*)&prv->mreq, sizeof(prv->mreq));
if (ret < 0) throw MulticastGroupJoinException();
}
}
void Socket::setRecv()
_throw(BindException)
{
#ifdef WIN32
if(bind(prv->sock, (SOCKADDR*)&prv->name, sizeof(prv->name)) < 0) {
// int err = WSAGetLastError();
if(prv->close_socket) closesocket(prv->sock);
throw BindException();
}
#else
if(bind(prv->sock, (struct sockaddr *)&prv->name, sizeof(prv->name)) < 0) {
if(prv->close_socket) close(prv->sock);
if(ADDR_IS_MULTICAST(prv->name.sin_addr.s_addr)) {
leave_group(prv->sock, prv->mreq);
}
throw BindException();
}
#endif
}
size_t Socket::sendTo(void *data, size_t size)
_throw(SendException)
{
ssize_t ret = sendto(prv->sock, (const char*) data, size, 0,
(struct sockaddr *)&prv->name, sizeof(struct sockaddr_in));
if(ret == -1 || (size_t)ret != size) throw SendException();
return ret;
}
size_t Socket::recvFrom(void *data, size_t size)
_throw(ReceiveException)
{
ssize_t ret;
#ifdef WIN32
// unsigned long int pending;
#endif
// do {
ret = recv(prv->sock, (char*) data, size, 0);
if(ret == -1) throw ReceiveException();
#ifdef WIN32
// ioctlsocket(prv->sock, FIONREAD, &pending);
// } while(pending > 0);
#else
// } while(recv(prv->sock, (char*) data, size, MSG_PEEK | MSG_DONTWAIT) > 0);
#endif
return ret;
}
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