1 /*
2 ** Zabbix
3 ** Copyright (C) 2001-2021 Zabbix SIA
4 **
5 ** This program is free software; you can redistribute it and/or modify
6 ** it under the terms of the GNU General Public License as published by
7 ** the Free Software Foundation; either version 2 of the License, or
8 ** (at your option) any later version.
9 **
10 ** This program is distributed in the hope that it will be useful,
11 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
12 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 ** GNU General Public License for more details.
14 **
15 ** You should have received a copy of the GNU General Public License
16 ** along with this program; if not, write to the Free Software
17 ** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 **/
19
20 #include "common.h"
21 #include "db.h"
22 #include "log.h"
23 #include "proxy.h"
24 #include "dbcache.h"
25
26 #include "proxyhosts.h"
27
28 /******************************************************************************
29 * *
30 * Function: recv_host_availability *
31 * *
32 * Purpose: update hosts availability, monitored by proxies *
33 * *
34 * Author: Alexander Vladishev *
35 * *
36 ******************************************************************************/
recv_host_availability(zbx_socket_t * sock,struct zbx_json_parse * jp)37 void recv_host_availability(zbx_socket_t *sock, struct zbx_json_parse *jp)
38 {
39 const char *__function_name = "recv_host_availability";
40
41 zbx_uint64_t proxy_hostid;
42 char host[HOST_HOST_LEN_MAX], *error = NULL;
43 int ret;
44
45 zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __function_name);
46
47 if (SUCCEED != (ret = get_active_proxy_id(jp, &proxy_hostid, host, sock, &error)))
48 {
49 zabbix_log(LOG_LEVEL_WARNING, "cannot parse host availability data from active proxy at \"%s\": %s",
50 sock->peer, error);
51 goto out;
52 }
53
54 process_host_availability(jp);
55 out:
56 zbx_send_response(sock, ret, error, CONFIG_TIMEOUT);
57
58 zbx_free(error);
59
60 zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __function_name);
61 }
62
63 /******************************************************************************
64 * *
65 * Function: send_host_availability *
66 * *
67 * Purpose: send hosts availability data from proxy *
68 * *
69 ******************************************************************************/
send_host_availability(zbx_socket_t * sock)70 void send_host_availability(zbx_socket_t *sock)
71 {
72 const char *__function_name = "send_host_availability";
73
74 struct zbx_json j;
75 int ret = FAIL, ts;
76 char *error = NULL;
77
78 zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __function_name);
79
80 if (SUCCEED != check_access_passive_proxy(sock, ZBX_DO_NOT_SEND_RESPONSE, "host availability data request"))
81 {
82 /* do not send any reply to server in this case as the server expects host availability data */
83 goto out1;
84 }
85
86 zbx_json_init(&j, ZBX_JSON_STAT_BUF_LEN);
87
88 /* if there are no host availability changes we still have to send empty data in response */
89 if (SUCCEED != get_host_availability_data(&j, &ts))
90 {
91 zbx_json_addarray(&j, ZBX_PROTO_TAG_DATA);
92 zbx_json_close(&j);
93 }
94
95 zabbix_log(LOG_LEVEL_DEBUG, "%s() [%s]", __function_name, j.buffer);
96
97 if (SUCCEED != zbx_tcp_send_to(sock, j.buffer, CONFIG_TIMEOUT))
98 {
99 error = zbx_strdup(error, zbx_socket_strerror());
100 goto out;
101 }
102
103 if (SUCCEED != zbx_recv_response(sock, CONFIG_TIMEOUT, &error))
104 goto out;
105
106 zbx_set_availability_diff_ts(ts);
107
108 ret = SUCCEED;
109 out:
110 if (SUCCEED != ret)
111 {
112 zabbix_log(LOG_LEVEL_WARNING, "cannot send host availability data to server at \"%s\": %s",
113 sock->peer, error);
114 }
115
116 zbx_json_free(&j);
117 zbx_free(error);
118 out1:
119 zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __function_name);
120 }
121