/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 * 
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org 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 Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/


#include <unistd.h> 
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <net/if.h>

#ifdef SOLARIS
#include <sys/sockio.h>
#endif

#include "osl/util.h"
#include "osl/diagnose.h"


/*****************************************************************************/
/* Static Module Functions */
/*****************************************************************************/

static int   osl_getHWAddr(const char *ifname, char* hard_addr);
static int   osl_checkAddr(const char* addr);


/*****************************************************************************/
/* osl_getEthernetAddress */
/*****************************************************************************/

sal_Bool SAL_CALL osl_getEthernetAddress( sal_uInt8 * pAddr )
{
#ifdef SOLARIS
    /** algorithm doesn't work on solaris */
    return sal_False;
#else
    char buff[1024];
    char hard_addr[64];
    struct ifconf ifc;
    struct ifreq *ifr;
    int i;
    int so;
    
    if ( pAddr == 0 )
    {
        return sal_False;
    }

    
    /*
     * All we need is ... a network file descriptor.
     * Normally, this is a very socket.
     */
    
    so = socket(AF_INET, SOCK_DGRAM, 0);	

    
    /*
     * The first thing we have to do, get the interface configuration.
     * It is a list of attached/configured interfaces
     */
    
    ifc.ifc_len = sizeof(buff);
    ifc.ifc_buf = buff;
    if ( ioctl(so, SIOCGIFCONF, &ifc) < 0 )
    {
        OSL_TRACE( "SIOCGIFCONF: %s\n", strerror(errno) );
        close(so);
        return sal_False;
    }

    close(so);
    
    /*
     *  For each of the interfaces in the interface list,
     *  try to get the hardware address
     */

    ifr = ifc.ifc_req;
    for ( i = ifc.ifc_len / sizeof(struct ifreq) ; --i >= 0 ; ifr++ )
    {
        int nRet=0;
        nRet = osl_getHWAddr(ifr->ifr_name,hard_addr);
        if ( nRet  > 0 )
        {
            memcpy( pAddr , hard_addr, 6 );
            return sal_True;
        }		
    }

    return sal_False;
#endif
}


/*****************************************************************************/
/* osl_getHWAddr */
/*****************************************************************************/

static int osl_getHWAddr(const char *ifname, char* hard_addr)
{
    int ret=0;
    struct ifreq ifr;
    int so = socket(AF_INET, SOCK_DGRAM, 0);	
    
    strcpy(ifr.ifr_name, ifname);

    /*
     *   First, get the Interface-FLAGS	 
     */
    
    ret=ioctl(so, SIOCGIFFLAGS, &ifr) ;

    if ( ret < 0 )
    { 
        OSL_TRACE( "SIOCGIFFLAGS: %s\n", strerror(errno) );
        close(so);
        return ret;
    } 

    
    /*
     *  If it is the loopback device, do not consider it any further
     */
    
    if (ifr.ifr_flags & IFF_LOOPBACK)
    {
        OSL_TRACE( "SIOCGIFFLAGS : is LOOPBACK : %s\n", strerror(errno) );
        close(so);
        return 0;
    }

    
    /*
     *  And now, the real thing: the get address
     */

#ifdef SIOCGIFHWADDR
    ret=ioctl(so, SIOCGIFHWADDR, &ifr);
#else
    ret=ioctl(so, SIOCGIFADDR, &ifr); 
#endif

    if (ret < 0) {	
        OSL_TRACE( "SIOCGIFADDR: %s\n", strerror(errno) );
        memset(hard_addr, 0, 32);
        close(so);
        return ret;
    } 

    close(so);

#ifdef SIOCGIFHWADDR
    memcpy(hard_addr,ifr.ifr_hwaddr.sa_data,8);
#else
    memcpy(hard_addr,ifr.ifr_ifru.ifru_addr.sa_data,8);
#endif

    
    /*
     *  Check, if no real, i.e. 00:00:00:00:00:00, address was retrieved.
     *  The Linux dummy device has this kind of behaviour
     */
    
    ret=osl_checkAddr(hard_addr);

    if (ret < 0) {
        OSL_TRACE( "SIOCGIFADDR got '00:00:00:00:00:00'\n" );
        return ret;  
    }

    return 1;
}


/*****************************************************************************/
/* osl_checkAddr */
/*****************************************************************************/

static int osl_checkAddr(const char* addr)
{
    if (addr[0]==0 && addr[1]==0 &&
        addr[2]==0 && addr[3]==0 &&
        addr[4]==0 && addr[5]==0)
    {
        return -1;
    }
    return 0;
}


#if defined (SPARC)

#if defined (SOLARIS) && !defined(__sparcv8plus) && !defined(__sparcv9)
#include <sys/types.h>
#include <sys/processor.h>

/*****************************************************************************/
/* osl_InitSparcV9 */
/*****************************************************************************/

void osl_InterlockedCountSetV9(sal_Bool bV9);

/*
 * osl_InitSparcV9() should be executed as early as possible. We place it in the 
 * .init section of sal
 */
#if defined ( __SUNPRO_C ) || defined ( __SUNPRO_CC )
void osl_InitSparcV9(void);
#pragma init (osl_InitSparcV9)
#elif defined ( __GNUC__ )
void osl_InitSparcV9(void)  __attribute__((constructor));
#endif

void osl_InitSparcV9(void)
{	
    /* processor_info() identifies SPARCV8 (ie sun4c machines) simply as "sparc"
     * and SPARCV9 (ie ultra sparcs, sun4u) as "sparcv9". Since we know that we
     * run at least on a SPARCV8 architecture or better, any processor type != "sparc"
     * and != "i386" is considered to be SPARCV9 or better
     *
     * This way we are certain that this will still work if someone names SPARCV10
     * "foobar"
     */
    processor_info_t aInfo;
    int rc;	

    rc = processor_info(0, &aInfo);

    if ( rc != -1 ) {
        if ( !strcmp( "sparc", aInfo.pi_processor_type )    /* SPARCV8 */
            || !strcmp( "i386", aInfo.pi_processor_type ) )	/* can't happen, but ... */
            return;
        /* we are reasonably certain to be on sparcv9/sparcv8plus or better */	
        osl_InterlockedCountSetV9(sal_True);
    }
}	
    
#endif /* SOLARIS */

#if defined(NETBSD) && defined(GCC) && !defined(__sparcv9) && !defined(__sparc_v9__)

#include <sys/param.h>
#include <sys/sysctl.h>
void osl_InitSparcV9(void)  __attribute__((constructor));
void osl_InterlockedCountSetV9(sal_Bool bV9);

/* Determine which processor we are running on (sparc v8 or v9)
 * The approach is very similar to Solaris.
 */

void osl_InitSparcV9(void)
{
    int mib[2]={CTL_HW,HW_MACHINE};
    char processorname[256];
    size_t len=256;

    /* get the machine name */
    sysctl(mib, 2, processorname, &len, NULL, 0);
    if (!strncmp("sparc64",processorname, len)) {
        osl_InterlockedCountSetV9(sal_True);
    }
}

#endif /* NETBSD */

#endif /* SPARC */

#if defined ( LINUX ) && defined ( SPARC )
#include <sys/utsname.h>
void osl_InitSparcV9(void)  __attribute__((constructor));
void osl_InterlockedCountSetV9(sal_Bool bV9);
/* Determine which processor we are running on (sparc v8 or v9)
 * The approach is very similar to Solaris.
 */
void osl_InitSparcV9(void)
{
    struct utsname name;
    int rc;	
    rc = uname(&name);
    if ( rc != -1 ) {
        if ( !strcmp( "sparc", name.machine )) 
        return;
    osl_InterlockedCountSetV9(sal_True);
    }
}
#endif

#if    ( defined(__GNUC__) && (defined(X86) || defined(X86_64)) )\
    || ( defined(SOLARIS) && defined (__SUNPRO_C) && defined(__i386) )

/* Safe default */
int osl_isSingleCPU = 0;

/* Determine if we are on a multiprocessor/multicore/HT x86/x64 system
 *
 * The lock prefix for atomic operations in osl_[inc|de]crementInterlockedCount()
 * comes with a cost and is especially expensive on pre HT x86 single processor 
 * systems, where it isn't needed at all.
 *
 * This should be run as early as possible, thus it's placed in the init section
 */
#if defined(_SC_NPROCESSORS_CONF) /* i.e. MACOSX for Intel doesn't have this */
#if defined(__GNUC__)
void osl_interlockedCountCheckForSingleCPU(void)  __attribute__((constructor));
#elif defined(__SUNPRO_C)
void osl_interlockedCountCheckForSingleCPU(void);
#pragma init (osl_interlockedCountCheckForSingleCPU)
#endif

void osl_interlockedCountCheckForSingleCPU(void)
{
    /* In case sysconfig fails be on the safe side, 
     * consider it a multiprocessor/multicore/HT system */   
    if ( sysconf(_SC_NPROCESSORS_CONF) == 1 ) {
        osl_isSingleCPU = 1;
    }
}
#endif /* defined(_SC_NPROCESSORS_CONF) */
#endif

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