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 "zbxicmpping.h"

​

#include <signal.h>

​

#include "zbxcomms.h"

#include "zbxstr.h"

#include "zbxip.h"

#include "zbxfile.h"

​

static const zbx_config_icmpping_t  *config_icmpping;

​

/* old official fping (2.4b2_to_ipv6) did not support source IP address */

/* old patched versions (2.4b2_to_ipv6) provided either -I or -S options */

/* since fping 3.x it provides -I option for binding to an interface and -S option for source IP address */

​

static ZBX_THREAD_LOCAL unsigned char   source_ip_checked;

static ZBX_THREAD_LOCAL const char  *source_ip_option;

#ifdef HAVE_IPV6

static ZBX_THREAD_LOCAL unsigned char   source_ip6_checked;

static ZBX_THREAD_LOCAL const char  *source_ip6_option;

#endif

​

#define FPING_UNINITIALIZED_VALUE   -2

static ZBX_THREAD_LOCAL int     packet_interval;

#ifdef HAVE_IPV6

static ZBX_THREAD_LOCAL int     packet_interval6;

static ZBX_THREAD_LOCAL int     fping_ipv6_supported;

#endif

​

static ZBX_THREAD_LOCAL time_t      fping_check_reset_at;   /* time of the last fping options expiration */

static ZBX_THREAD_LOCAL char        tmpfile_uniq[255] = {'\0'};

​

typedef struct

{

    zbx_fping_host_t    *hosts;

    int         hosts_count;

    int         requests_count;

    unsigned char       allow_redirect;

    int         rdns;

#ifdef HAVE_IPV6

#   define FPING_EXISTS 0x1

#   define FPING6_EXISTS    0x2

    char            fping_existence;

#endif

}

zbx_fping_args;

​

typedef struct

{

    FILE    *input_pipe;

    char    *linebuf;

    size_t  linebuf_size;

}

zbx_fping_resp;

​

static void get_source_ip_option(const char *fping, const char **option, unsigned char *checked)

{

    FILE    *f;

    char    *p, tmp[MAX_STRING_LEN];

​

    zbx_snprintf(tmp, sizeof(tmp), "%s -h 2>&1", fping);

​

    zabbix_log(LOG_LEVEL_DEBUG, "executing %s", tmp);

​

    if (NULL == (f = popen(tmp, "r")))

        return;

​

    while (NULL != zbx_fgets(tmp, sizeof(tmp), f))

    {

        for (p = tmp; isspace(*p); p++)

            ;

​

        if ('-' == p[0] && 'I' == p[1] && (isspace(p[2]) || ',' == p[2]))

        {

            *option = "-I";

            continue;

        }