Zabbix

/*

** Copyright (C) 2001-2025 Zabbix SIA

**

** This program is free software: you can redistribute it and/or modify it under the terms of

** the GNU Affero General Public License as published by the Free Software Foundation, version 3.

**

** This program 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 Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

#include "zbxsysinfo.h"

#include "../sysinfo.h"

​

#include "../common/zbxsysinfo_common.h"

​

#include "zbxnum.h"

​

static struct ifmibdata ifmd;

​

static int  get_ifmib_general(const char *if_name, char **error)

{

    int mib[6], ifcount;

    size_t  len;

​

    if (NULL == if_name || '\0'== *if_name)

    {

        *error = zbx_strdup(NULL, "Network interface name cannot be empty.");

        return SYSINFO_RET_FAIL;

    }

​

    mib[0] = CTL_NET;

    mib[1] = PF_LINK;

    mib[2] = NETLINK_GENERIC;

    mib[3] = IFMIB_SYSTEM;

    mib[4] = IFMIB_IFCOUNT;

​

    len = sizeof(ifcount);

​

    if (-1 == sysctl(mib, 5, &ifcount, &len, NULL, 0))

    {

        *error = zbx_dsprintf(NULL, "Cannot obtain number of network interfaces: %s", zbx_strerror(errno));

        return SYSINFO_RET_FAIL;

    }

​

    mib[3] = IFMIB_IFDATA;

    mib[5] = IFDATA_GENERAL;

​

    len = sizeof(ifmd);

​

    for (mib[4] = 1; mib[4] <= ifcount; mib[4]++)

    {

        if (-1 == sysctl(mib, 6, &ifmd, &len, NULL, 0))

        {

            if (ENOENT == errno)

                continue;

​

            *error = zbx_dsprintf(NULL, "Cannot obtain network interface information: %s",

                    zbx_strerror(errno));

            return SYSINFO_RET_FAIL;

        }

​

        if (0 == strcmp(ifmd.ifmd_name, if_name))

            return SYSINFO_RET_OK;

    }

​

    *error = zbx_strdup(NULL, "Cannot find information for this network interface.");

​

    return SYSINFO_RET_FAIL;

}

​

int net_if_in(AGENT_REQUEST *request, AGENT_RESULT *result)

{

    char    *if_name, *mode, *error;

​

    if (2 < request->nparam)

    {

        SET_MSG_RESULT(result, zbx_strdup(NULL, "Too many parameters."));

        return SYSINFO_RET_FAIL;

    }

​

    if_name = get_rparam(request, 0);

    mode = get_rparam(request, 1);

​

    if (SYSINFO_RET_FAIL == get_ifmib_general(if_name, &error))

    {

        SET_MSG_RESULT(result, error);

        return SYSINFO_RET_FAIL;