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/*
** Zabbix
** Copyright (C) 2001-2021 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 "common.h"
#include "db.h"
#include "log.h"
#include "proxy.h"
#include "../../libs/zbxcrypto/tls_tcp_active.h"
#include "zbxcompress.h"
#include "proxyconfig.h"
/******************************************************************************
* *
* Function: send_proxyconfig *
* *
* Purpose: send configuration tables to the proxy from server *
* (for active proxies) *
* *
* Author: Alexander Vladishev *
* *
******************************************************************************/
void send_proxyconfig(zbx_socket_t *sock, struct zbx_json_parse *jp)
{
char *error = NULL, *buffer = NULL;
struct zbx_json j;
DC_PROXY proxy;
int ret, flags = ZBX_TCP_PROTOCOL;
size_t buffer_size, reserved = 0;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);
if (SUCCEED != get_active_proxy_from_request(jp, &proxy, &error))
{
zabbix_log(LOG_LEVEL_WARNING, "cannot parse proxy configuration data request from active proxy at"
" \"%s\": %s", sock->peer, error);
goto out;
}
if (SUCCEED != zbx_proxy_check_permissions(&proxy, sock, &error))
{
zabbix_log(LOG_LEVEL_WARNING, "cannot accept connection from proxy \"%s\" at \"%s\", allowed address:"
" \"%s\": %s", proxy.host, sock->peer, proxy.proxy_address, error);
goto out;
}
zbx_update_proxy_data(&proxy, zbx_get_proxy_protocol_version(jp), time(NULL),
(0 != (sock->protocol & ZBX_TCP_COMPRESS) ? 1 : 0), ZBX_FLAGS_PROXY_DIFF_UPDATE_CONFIG);
if (0 != proxy.auto_compress)
flags |= ZBX_TCP_COMPRESS;
zbx_json_init(&j, ZBX_JSON_STAT_BUF_LEN);
if (SUCCEED != get_proxyconfig_data(proxy.hostid, &j, &error))
{
zbx_send_response_ext(sock, FAIL, error, NULL, flags, CONFIG_TIMEOUT);
zabbix_log(LOG_LEVEL_WARNING, "cannot collect configuration data for proxy \"%s\" at \"%s\": %s",
proxy.host, sock->peer, error);
goto clean;
}
zabbix_log(LOG_LEVEL_DEBUG, "%s", j.buffer);
if (0 != proxy.auto_compress)
{
if (SUCCEED != zbx_compress(j.buffer, j.buffer_size, &buffer, &buffer_size))
{
zabbix_log(LOG_LEVEL_ERR,"cannot compress data: %s", zbx_compress_strerror());
goto clean;
}
reserved = j.buffer_size;
zbx_json_free(&j); /* json buffer can be large, free as fast as possible */
zabbix_log(LOG_LEVEL_WARNING, "sending configuration data to proxy \"%s\" at \"%s\", datalen "
ZBX_FS_SIZE_T ", bytes " ZBX_FS_SIZE_T " with compression ratio %.1f", proxy.host,
sock->peer, (zbx_fs_size_t)reserved, (zbx_fs_size_t)buffer_size,
(double)reserved / buffer_size);
ret = zbx_tcp_send_ext(sock, buffer, buffer_size, reserved, flags, CONFIG_TRAPPER_TIMEOUT);
}
else
{
zabbix_log(LOG_LEVEL_WARNING, "sending configuration data to proxy \"%s\" at \"%s\", datalen "
ZBX_FS_SIZE_T, proxy.host, sock->peer, (zbx_fs_size_t)j.buffer_size);
ret = zbx_tcp_send_ext(sock, j.buffer, strlen(j.buffer), 0, flags, CONFIG_TRAPPER_TIMEOUT);
}
if (SUCCEED != ret)
{
zabbix_log(LOG_LEVEL_WARNING, "cannot send configuration data to proxy \"%s\" at \"%s\": %s",
proxy.host, sock->peer, zbx_socket_strerror());
}
clean:
zbx_json_free(&j);
out:
zbx_free(error);
zbx_free(buffer);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __func__);
}
/******************************************************************************
* *
* Function: recv_proxyconfig *
* *
* Purpose: receive configuration tables from server (passive proxies) *
* *
* Author: Alexander Vladishev *
* *
******************************************************************************/
void recv_proxyconfig(zbx_socket_t *sock, struct zbx_json_parse *jp)
{
struct zbx_json_parse jp_data;
int ret;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);
if (SUCCEED != (ret = zbx_json_brackets_by_name(jp, ZBX_PROTO_TAG_DATA, &jp_data)))
{
zabbix_log(LOG_LEVEL_WARNING, "cannot parse proxy configuration data received from server at"
" \"%s\": %s", sock->peer, zbx_json_strerror());
zbx_send_proxy_response(sock, ret, zbx_json_strerror(), CONFIG_TIMEOUT);
goto out;
}
if (SUCCEED != check_access_passive_proxy(sock, ZBX_SEND_RESPONSE, "configuration update"))
goto out;
process_proxyconfig(&jp_data);
zbx_send_proxy_response(sock, ret, NULL, CONFIG_TIMEOUT);
out:
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __func__);
}
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