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/*
   Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Her Majesty the
   Queen in Right of Canada (Communications Research Center Canada)
   */
/*
   This file is part of ODR-DabMux.

   ODR-DabMux is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as
   published by the Free Software Foundation, either version 3 of the
   License, or (at your option) any later version.

   ODR-DabMux 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with ODR-DabMux.  If not, see <http://www.gnu.org/licenses/>.
   */

#include "InetAddress.h"
#include <iostream>
#include <stdio.h>

#ifdef _WIN32
#else
# include <errno.h>
# include <string.h>
#endif

#ifdef TRACE_ON
# ifndef TRACE_CLASS
#  define TRACE_CLASS(clas, func) cout <<"-" <<(clas) <<"\t(" <<this <<")::" <<(func) <<endl
#  define TRACE_STATIC(clas, func) cout <<"-" <<(clas) <<"\t(static)::" <<(func) <<endl
# endif
#else
# ifndef TRACE_CLASS
#  define TRACE_CLASS(clas, func)
#  define TRACE_STATIC(clas, func)
# endif
#endif


int inetErrNo = 0;
const char *inetErrMsg = NULL;
const char *inetErrDesc = NULL;


/**
 *  Constructs an IP address.
 *  @param port The port of this address
 *  @param name The name of this address
 */
InetAddress::InetAddress(int port, const char* name) {
    TRACE_CLASS("InetAddress", "InetAddress(int, char)");
    addr.sin_family = PF_INET;
    addr.sin_addr.s_addr = htons(INADDR_ANY);
    addr.sin_port = htons(port);
    if (name)
        setAddress(name);
}


/**
 *  Constructs a copy of inet
 *  @param inet The address to be copied
 */
InetAddress::InetAddress(const InetAddress &inet) {
    TRACE_CLASS("InetAddress", "InetAddress(InetAddress)");
    memcpy(&addr, &inet.addr, sizeof(addr));
}


/// Destructor
InetAddress::~InetAddress() {
    TRACE_CLASS("InetAddress" ,"~InetAddress()");
}


/// Returns the raw IP address of this InetAddress object.
sockaddr *InetAddress::getAddress() {
    TRACE_CLASS("InetAddress", "getAddress()");
    return (sockaddr *)&addr;
}


/// Return the port of this address.
int InetAddress::getPort()
{
    TRACE_CLASS("InetAddress", "getPort()");
    return ntohs(addr.sin_port);
}


/**
 *  Returns the IP address string "%d.%d.%d.%d".
 *  @return IP address
 */
const char *InetAddress::getHostAddress() {
    TRACE_CLASS("InetAddress", "getHostAddress()");
    return inet_ntoa(addr.sin_addr);
}


/// Returns true if this address is multicast
bool InetAddress::isMulticastAddress() {
    TRACE_CLASS("InetAddress", "isMulticastAddress()");
    return IN_MULTICAST(ntohl(addr.sin_addr.s_addr));		// a modifier
}


/**
 *  Set the port number
 *  @param port The new port number
 */
void InetAddress::setPort(int port)
{
    TRACE_CLASS("InetAddress", "setPort(int)");
    addr.sin_port = htons(port);
}


/**
 *  Set the address
 *  @param name The new address name
 *  @return 0  if ok
 *          -1 if error
 */
int InetAddress::setAddress(const char *name)
{
    TRACE_CLASS("InetAddress", "setAddress(char*)");
    if (name) {
        if (atoi(name)) {   // If it start with a number
            if ((addr.sin_addr.s_addr = inet_addr(name)) == INADDR_NONE) {
                addr.sin_addr.s_addr = htons(INADDR_ANY);
                inetErrNo = 0;
                inetErrMsg = "Invalid address";
                inetErrDesc = name;
                return -1;
            }
        } else {            // Assume it's a real name
            hostent *host = gethostbyname(name);
            if (host) {
                addr.sin_addr = *(in_addr *)(host->h_addr);
            } else {
                addr.sin_addr.s_addr = htons(INADDR_ANY);
                inetErrNo = 0;
                inetErrMsg = "Could not find address";
                inetErrDesc = name;
                return -1;
            }
        }
    } else {
        addr.sin_addr.s_addr = INADDR_ANY;
    }
    return 0;
}


void setInetError(const char* description)
{
    inetErrNo = 0;
#ifdef _WIN32
    inetErrNo = WSAGetLastError();
    switch (inetErrNo) {
        case WSANOTINITIALISED:
            inetErrMsg = "WSANOTINITIALISED A successful WSAStartup must occur before using this function.";
            break;
        case WSAENETDOWN:
            inetErrMsg = "WSAENETDOWN The network subsystem has failed.";
            break;
        case WSAEFAULT:
            inetErrMsg = "WSAEFAULT The buf or from parameters are not part of the user address space, or the fromlen parameter is too small to accommodate the peer address.";
            break;
        case WSAEINTR:
            inetErrMsg = "WSAEINTR The (blocking) call was canceled through WSACancelBlockingCall.";
            break;
        case WSAEINPROGRESS:
            inetErrMsg = "WSAEINPROGRESS A blocking Windows Sockets 1.1 call is in progress, or the service provider is still processing a callback function.";
            break;
        case WSAEINVAL:
            inetErrMsg = "WSAEINVAL The socket has not been bound with bind, or an unknown flag was specified, or MSG_OOB was specified for a socket with SO_OOBINLINE enabled, or (for byte stream-style sockets only) len was zero or negative.";
            break;
        case WSAEISCONN:
            inetErrMsg = "WSAEISCONN The socket is connected. This function is not permitted with a connected socket, whether the socket is connection-oriented or connectionless.";
            break;
        case WSAENETRESET:
            inetErrMsg = "WSAENETRESET The connection has been broken due to the \"keep-alive\" activity detecting a failure while the operation was in progress.";
            break;
        case WSAENOTSOCK:
            inetErrMsg = "WSAENOTSOCK The descriptor is not a socket.";
            break;
        case WSAEOPNOTSUPP:
            inetErrMsg = "WSAEOPNOTSUPP MSG_OOB was specified, but the socket is not stream-style such as type SOCK_STREAM, out-of-band data is not supported in the communication domain associated with this socket, or the socket is unidirectional and supports only send operations.";
            break;
        case WSAESHUTDOWN:
            inetErrMsg = "WSAESHUTDOWN The socket has been shut down; it is not possible to recvfrom on a socket after shutdown has been invoked with how set to SD_RECEIVE or SD_BOTH.";
            break;
        case WSAEWOULDBLOCK:
            inetErrMsg = "WSAEWOULDBLOCK The socket is marked as nonblocking and the recvfrom operation would block.";
            break;
        case WSAEMSGSIZE:
            inetErrMsg = "WSAEMSGSIZE The message was too large to fit into the specified buffer and was truncated.";
            break;
        case WSAETIMEDOUT:
            inetErrMsg = "WSAETIMEDOUT The connection has been dropped, because of a network failure or because the system on the other end went down without notice.";
            break;
        case WSAECONNRESET:
            inetErrMsg = "WSAECONNRESET";
            break;
        case WSAEACCES:
            inetErrMsg = "WSAEACCES The requested address is a broadcast address, but the appropriate flag was not set. Call setsockopt with the SO_BROADCAST parameter to allow the use of the broadcast address.";
            break;
        case WSAENOBUFS:
            inetErrMsg = "WSAENOBUFS No buffer space is available.";
            break;
        case WSAENOTCONN:
            inetErrMsg = "WSAENOTCONN The socket is not connected (connection-oriented sockets only)";
            break;
        case WSAEHOSTUNREACH:
            inetErrMsg = "WSAEHOSTUNREACH The remote host cannot be reached from this host at this time.";
            break;
        case WSAECONNABORTED:
            inetErrMsg = "WSAECONNABORTED The virtual circuit was terminated due to a time-out or other failure. The application should close the socket as it is no longer usable.";
            break;
        case WSAEADDRNOTAVAIL:
            inetErrMsg = "WSAEADDRNOTAVAIL The remote address is not a valid address, for example, ADDR_ANY.";
            break;
        case WSAEAFNOSUPPORT:
            inetErrMsg = "WSAEAFNOSUPPORT Addresses in the specified family cannot be used with this socket.";
            break;
        case WSAEDESTADDRREQ:
            inetErrMsg = "WSAEDESTADDRREQ A destination address is required.";
            break;
        case WSAENETUNREACH:
            inetErrMsg = "WSAENETUNREACH The network cannot be reached from this host at this time.";
            break;
        case WSAEMFILE:
            inetErrMsg = "No more socket descriptors are available.";
            break;
        case WSAEPROTONOSUPPORT:
            inetErrMsg = "The specified protocol is not supported.";
            break;
        case WSAEPROTOTYPE:
            inetErrMsg = "The specified protocol is the wrong type for this socket.";
            break;
        case WSAESOCKTNOSUPPORT:
            inetErrMsg = "The specified socket type is not supported in this address family.";
            break;
        default:
            inetErrMsg = "Unknown";
    };
#else
    inetErrNo = errno;
    inetErrMsg = strerror(inetErrNo);
#endif
    inetErrDesc = description;
}