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/* $Id: NetIf-linux.cpp $ */
/** @file
* Main - NetIfList, Linux implementation.
*/
/*
* Copyright (C) 2008 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#define LOG_GROUP LOG_GROUP_MAIN
#include <iprt/err.h>
#include <list>
#include <sys/ioctl.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <net/route.h>
#include <netinet/in.h>
#include <stdio.h>
#include <unistd.h>
#include <iprt/asm.h>
#include "HostNetworkInterfaceImpl.h"
#include "netif.h"
#include "Logging.h"
static int getDefaultIfaceName(char *pszName)
{
FILE *fp = fopen("/proc/net/route", "r");
char szBuf[1024];
char szIfName[17];
char szAddr[129];
char szGateway[129];
char szMask[129];
int iTmp;
unsigned uFlags;
if (fp)
{
while (fgets(szBuf, sizeof(szBuf)-1, fp))
{
int n = sscanf(szBuf, "%16s %128s %128s %X %d %d %d %128s %d %d %d\n",
szIfName, szAddr, szGateway, &uFlags, &iTmp, &iTmp, &iTmp,
szMask, &iTmp, &iTmp, &iTmp);
if (n < 10 || !(uFlags & RTF_UP))
continue;
if (strcmp(szAddr, "00000000") == 0 && strcmp(szMask, "00000000") == 0)
{
fclose(fp);
strncpy(pszName, szIfName, 16);
pszName[16] = 0;
return VINF_SUCCESS;
}
}
fclose(fp);
}
return VERR_INTERNAL_ERROR;
}
static int getInterfaceInfo(int iSocket, const char *pszName, PNETIFINFO pInfo)
{
// Zeroing out pInfo is a bad idea as it should contain both short and long names at
// this point. So make sure the structure is cleared by the caller if necessary!
// memset(pInfo, 0, sizeof(*pInfo));
struct ifreq Req;
memset(&Req, 0, sizeof(Req));
strncpy(Req.ifr_name, pszName, sizeof(Req.ifr_name) - 1);
if (ioctl(iSocket, SIOCGIFHWADDR, &Req) >= 0)
{
switch (Req.ifr_hwaddr.sa_family)
{
case ARPHRD_ETHER:
pInfo->enmMediumType = NETIF_T_ETHERNET;
break;
default:
pInfo->enmMediumType = NETIF_T_UNKNOWN;
break;
}
/* Generate UUID from name and MAC address. */
RTUUID uuid;
RTUuidClear(&uuid);
memcpy(&uuid, Req.ifr_name, RT_MIN(sizeof(Req.ifr_name), sizeof(uuid)));
uuid.Gen.u8ClockSeqHiAndReserved = (uuid.Gen.u8ClockSeqHiAndReserved & 0x3f) | 0x80;
uuid.Gen.u16TimeHiAndVersion = (uuid.Gen.u16TimeHiAndVersion & 0x0fff) | 0x4000;
memcpy(uuid.Gen.au8Node, &Req.ifr_hwaddr.sa_data, sizeof(uuid.Gen.au8Node));
pInfo->Uuid = uuid;
memcpy(&pInfo->MACAddress, Req.ifr_hwaddr.sa_data, sizeof(pInfo->MACAddress));
if (ioctl(iSocket, SIOCGIFADDR, &Req) >= 0)
memcpy(pInfo->IPAddress.au8,
&((struct sockaddr_in *)&Req.ifr_addr)->sin_addr.s_addr,
sizeof(pInfo->IPAddress.au8));
if (ioctl(iSocket, SIOCGIFNETMASK, &Req) >= 0)
memcpy(pInfo->IPNetMask.au8,
&((struct sockaddr_in *)&Req.ifr_addr)->sin_addr.s_addr,
sizeof(pInfo->IPNetMask.au8));
if (ioctl(iSocket, SIOCGIFFLAGS, &Req) >= 0)
pInfo->enmStatus = Req.ifr_flags & IFF_UP ? NETIF_S_UP : NETIF_S_DOWN;
FILE *fp = fopen("/proc/net/if_inet6", "r");
if (fp)
{
RTNETADDRIPV6 IPv6Address;
unsigned uIndex, uLength, uScope, uTmp;
char szName[30];
for (;;)
{
memset(szName, 0, sizeof(szName));
int n = fscanf(fp,
"%08x%08x%08x%08x"
" %02x %02x %02x %02x %20s\n",
&IPv6Address.au32[0], &IPv6Address.au32[1],
&IPv6Address.au32[2], &IPv6Address.au32[3],
&uIndex, &uLength, &uScope, &uTmp, szName);
if (n == EOF)
break;
if (n != 9 || uLength > 128)
{
Log(("getInterfaceInfo: Error while reading /proc/net/if_inet6, n=%d uLength=%u\n",
n, uLength));
break;
}
if (!strcmp(Req.ifr_name, szName))
{
pInfo->IPv6Address.au32[0] = htonl(IPv6Address.au32[0]);
pInfo->IPv6Address.au32[1] = htonl(IPv6Address.au32[1]);
pInfo->IPv6Address.au32[2] = htonl(IPv6Address.au32[2]);
pInfo->IPv6Address.au32[3] = htonl(IPv6Address.au32[3]);
ASMBitSetRange(&pInfo->IPv6NetMask, 0, uLength);
}
}
fclose(fp);
}
}
return VINF_SUCCESS;
}
int NetIfList(std::list <ComObjPtr<HostNetworkInterface> > &list)
{
char szDefaultIface[256];
int rc = getDefaultIfaceName(szDefaultIface);
if (RT_FAILURE(rc))
{
Log(("NetIfList: Failed to find default interface.\n"));
szDefaultIface[0] = 0;
}
int sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock >= 0)
{
FILE *fp = fopen("/proc/net/dev", "r");
if (fp)
{
char buf[256];
while (fgets(buf, sizeof(buf), fp))
{
char *pszEndOfName = strchr(buf, ':');
if (!pszEndOfName)
continue;
*pszEndOfName = 0;
int iFirstNonWS = strspn(buf, " ");
char *pszName = buf+iFirstNonWS;
NETIFINFO Info;
RT_ZERO(Info);
rc = getInterfaceInfo(sock, pszName, &Info);
if (RT_FAILURE(rc))
break;
if (Info.enmMediumType == NETIF_T_ETHERNET)
{
ComObjPtr<HostNetworkInterface> IfObj;
IfObj.createObject();
HostNetworkInterfaceType_T enmType;
if (strncmp("vboxnet", pszName, 7))
enmType = HostNetworkInterfaceType_Bridged;
else
enmType = HostNetworkInterfaceType_HostOnly;
if (SUCCEEDED(IfObj->init(Bstr(pszName), enmType, &Info)))
{
if (strcmp(pszName, szDefaultIface) == 0)
list.push_front(IfObj);
else
list.push_back(IfObj);
}
}
}
fclose(fp);
}
close(sock);
}
else
rc = VERR_INTERNAL_ERROR;
return rc;
}
int NetIfGetConfigByName(PNETIFINFO pInfo)
{
int rc = VINF_SUCCESS;
int sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock < 0)
return VERR_NOT_IMPLEMENTED;
rc = getInterfaceInfo(sock, pInfo->szShortName, pInfo);
close(sock);
return rc;
}
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