dgramclient.cpp

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#include <string.h>
#include <unistd.h>
#include <string>

/*
   The committers of the libsocket project, all rights reserved
   (c) 2012, dermesser <lbo@spheniscida.de>

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions are met:

   1. Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.
   2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

   THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS “AS IS” AND ANY
   EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
   DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

#include <dgramclient.hpp>
#include <exception.hpp>

namespace libsocket {
using std::string;

dgram_client_socket::dgram_client_socket(void) : connected(false) {}

ssize_t dgram_client_socket::rcv(void* buf, size_t len, int flags) {
    ssize_t bytes;

    memset(buf, 0, len);

    if (-1 == (bytes = recv(sfd, buf, len, flags)))
        throw socket_exception(__FILE__, __LINE__,
                               "dgram_client_socket::rcv() - recv() failed!");

    return bytes;
}

dgram_client_socket& operator>>(dgram_client_socket& sock, string& dest) {
    ssize_t read_bytes;

    char* buffer = new char[dest.size()];

    memset(buffer, 0, dest.size());

    if (-1 == (read_bytes = read(sock.sfd, buffer, dest.size()))) {
        delete[] buffer;
        if (sock.is_nonblocking && errno == EWOULDBLOCK) {
            dest.clear();
            return sock;
        } else
            throw socket_exception(__FILE__, __LINE__,
                                   ">>(dgram_client_socket, std::string) "
                                   "input: Error while reading!");
    }

    if (read_bytes < static_cast<ssize_t>(dest.size()))
        dest.resize(read_bytes);  // So the client doesn't print content more
                                  // than one time
    // and it can check if the string's length is 0 (end of transmission)

    dest.assign(buffer, read_bytes);

    delete[] buffer;

    return sock;
}

ssize_t dgram_client_socket::snd(const void* buf, size_t len, int flags) {
    ssize_t bytes;

    if (connected != true)
        throw socket_exception(
            __FILE__, __LINE__,
            "dgram_client_socket::snd() - Socket is not connected!", false);

    if (-1 == (bytes = send(sfd, buf, len, flags)))
        throw socket_exception(__FILE__, __LINE__,
                               "dgram_client_socket::snd() - send() failed!");

    return bytes;
}

dgram_client_socket& operator<<(dgram_client_socket& sock, const char* str) {
    if (str == NULL)
        throw socket_exception(
            __FILE__, __LINE__,
            "dgram_client_socket <<(const char*) output: Null buffer given!");
    if (sock.connected == false)
        throw socket_exception(__FILE__, __LINE__,
                               "dgram_client_socket <<(const char*) output: "
                               "DGRAM socket not connected!");

    size_t len = strlen(str);

    if (-1 == write(sock.sfd, str, len))
        throw socket_exception(
            __FILE__, __LINE__,
            "dgram_client_socket <<(const char*) output: Write failed!");

    return sock;
}

dgram_client_socket& operator<<(dgram_client_socket& sock, const string& str) {
    if (sock.connected == false)
        throw socket_exception(__FILE__, __LINE__,
                               "dgram_client_socket <<(std::string) output: "
                               "DGRAM socket not connected!");
    if (-1 == write(sock.sfd, str.c_str(), str.size()))
        throw socket_exception(
            __FILE__, __LINE__,
            "dgram_client_socket <<(std::string) output: Write failed!");

    return sock;
}

bool dgram_client_socket::getconn(void) const { return is_connected(); }

bool dgram_client_socket::is_connected(void) const { return connected; }
}  // namespace libsocket