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/*
** Zabbix
** Copyright (C) 2001-2022 Zabbix SIA
**
** This program 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 2 of the License, or
** (at your option) any later version.
**
** 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 General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
#include "zbxsysinfo.h"
#include "log.h"
#include "zbxstr.h"
ZBX_METRIC parameter_hostname =
/* KEY FLAG FUNCTION TEST PARAMETERS */
{"system.hostname", CF_HAVEPARAMS, SYSTEM_HOSTNAME, NULL};
static void retrieve_hostname(char *buffer, int len, char **error)
{
if (SUCCEED != gethostname(buffer, len))
{
zabbix_log(LOG_LEVEL_ERR, "gethostname() failed: %s", strerror_from_system(WSAGetLastError()));
*error = zbx_dsprintf(NULL, "Cannot obtain host name: %s", strerror_from_system(WSAGetLastError()));
}
}
int SYSTEM_HOSTNAME(AGENT_REQUEST *request, AGENT_RESULT *result)
{
DWORD dwSize = 256;
wchar_t computerName[256];
char *type, *transform, buffer[256], *name, *error = NULL;
if (2 < request->nparam)
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Too many parameters."));
return SYSINFO_RET_FAIL;
}
type = get_rparam(request, 0);
transform = get_rparam(request, 1);
if (NULL == type || '\0' == *type || 0 == strcmp(type, "netbios"))
{
/* Buffer size is chosen large enough to contain any DNS name, not just */
/* MAX_COMPUTERNAME_LENGTH + 1 characters. MAX_COMPUTERNAME_LENGTH is usually less than 32, */
/* but it varies among systems, so we cannot use the constant in a precompiled Windows agent,*/
/* which is expected to work on any system. */
if (0 == GetComputerName(computerName, &dwSize))
{
zabbix_log(LOG_LEVEL_ERR, "GetComputerName() failed: %s",
strerror_from_system(GetLastError()));
SET_MSG_RESULT(result, zbx_dsprintf(NULL, "Cannot obtain computer name: %s",
strerror_from_system(GetLastError())));
return SYSINFO_RET_FAIL;
}
name = zbx_unicode_to_utf8(computerName);
}
else
{
if (0 == strcmp(type, "shorthost"))
{
retrieve_hostname(buffer, sizeof(buffer), &error);
if (NULL != error)
{
SET_MSG_RESULT(result, error);
return SYSINFO_RET_FAIL;
}
char *dot;
if (NULL != (dot = strchr(buffer, '.')))
*dot = '\0';
name = zbx_strdup(NULL, buffer);
}
else if (0 == strcmp(type, "host"))
{
retrieve_hostname(buffer, sizeof(buffer), &error);
if (NULL != error)
{
SET_MSG_RESULT(result, error);
return SYSINFO_RET_FAIL;
}
name = zbx_strdup(NULL, buffer);
}
else
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Invalid first parameter."));
return SYSINFO_RET_FAIL;
}
}
if (NULL != transform && '\0' != *transform && 0 != strcmp(transform, "none"))
{
if (0 == strcmp(transform, "lower"))
{
zbx_strlower(name);
}
else
{
zbx_free(name);
SET_MSG_RESULT(result, zbx_strdup(NULL, "Invalid second parameter."));
return SYSINFO_RET_FAIL;
}
}
SET_STR_RESULT(result, name);
return SYSINFO_RET_OK;
}
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