DgramSocketServerDescriptor.cpp

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/*
 * DgramSocketServerDescriptor.cpp
 *
 * Copyright (C) 2012 Evidence Srl - www.evidence.eu.com
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
 */

#include <stdexcept>
#include "DgramSocketServerDescriptor.hpp"
#include "Logger.hpp"


namespace onposix {


/**
 * \brief Constructor for local connection-less sockets.
 *
 * This constructor creates a connection-less AF_UNIX socket.
 * It calls socket()+bind().
 * @param name Name of the local socket on the filesystem
 * @exception runtime_error in case of error in socket(), bind() or listen()
 */
DgramSocketServerDescriptor::DgramSocketServerDescriptor(const std::string& name)
{
        // socket()
        fd_ = socket(AF_UNIX, SOCK_DGRAM, 0);
        if (fd_ < 0) {
                ERROR("Socket creation");
                throw std::runtime_error ("Socket error");
        }

        // bind()
        struct sockaddr_un serv_addr;
        bzero((char *) &serv_addr, sizeof(serv_addr));
        serv_addr.sun_family = AF_UNIX;
        strncpy(serv_addr.sun_path, name.c_str(),
            sizeof(serv_addr.sun_path) - 1);
        if (bind(fd_, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
                ::close(fd_);
                ERROR("Socket binding");
                throw std::runtime_error ("Bind error");
        }
}

/**
 * \brief Constructor for UDP sockets.
 *
 * This constructor creates a connection-less AF_INET socket.
 * It calls socket()+bind().
 * @param port Port of the socket
 * @exception runtime_error in case of error in socket(), bind() or listen()
 */
DgramSocketServerDescriptor::DgramSocketServerDescriptor(const uint16_t port)
{
        // socket()
        fd_ = socket(AF_INET, SOCK_DGRAM, 0);
        if (fd_ < 0) {
                ERROR("Socket creation");
                throw std::runtime_error ("Socket error");
        }

        // bind()
        struct sockaddr_in serv_addr;
        bzero((char *) &serv_addr, sizeof(serv_addr));
        serv_addr.sin_family = AF_INET;
        serv_addr.sin_port = htons(port);
        serv_addr.sin_addr.s_addr = INADDR_ANY;
        if (bind(fd_, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
                ::close(fd_);
                ERROR("Socket binding");
                throw std::runtime_error ("Bind error");
        }
}

} /* onposix */