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1 // SPDX-License-Identifier: GPL-3.0-or-later
2
3 #include "plugin_proc.h"
4
5 #define PLUGIN_PROC_MODULE_SYNPROXY_NAME "/proc/net/stat/synproxy"
6
7 #define RRD_TYPE_NET_STAT_NETFILTER "netfilter"
8 #define RRD_TYPE_NET_STAT_SYNPROXY "synproxy"
9
10 int do_proc_net_stat_synproxy(int update_every, usec_t dt) {
11 (void)dt;
12
13 static int do_cookies = -1, do_syns = -1, do_reopened = -1;
14 static procfile *ff = NULL;
15
16 if(unlikely(do_cookies == -1)) {
17 do_cookies = inicfg_get_boolean_ondemand(&netdata_config, "plugin:proc:/proc/net/stat/synproxy", "SYNPROXY cookies", CONFIG_BOOLEAN_AUTO);
18 do_syns = inicfg_get_boolean_ondemand(&netdata_config, "plugin:proc:/proc/net/stat/synproxy", "SYNPROXY SYN received", CONFIG_BOOLEAN_AUTO);
19 do_reopened = inicfg_get_boolean_ondemand(&netdata_config, "plugin:proc:/proc/net/stat/synproxy", "SYNPROXY connections reopened", CONFIG_BOOLEAN_AUTO);
20 }
21
22 if(unlikely(!ff)) {
23 char filename[FILENAME_MAX + 1];
24 snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/net/stat/synproxy");
25 ff = procfile_open(inicfg_get(&netdata_config, "plugin:proc:/proc/net/stat/synproxy", "filename to monitor", filename), " \t,:|", PROCFILE_FLAG_DEFAULT);
26 if(unlikely(!ff))
27 return 1;
28 }
29
30 ff = procfile_readall(ff);
31 if(unlikely(!ff))
32 return 0; // we return 0, so that we will retry to open it next time
33
34 // make sure we have 3 lines
35 size_t lines = procfile_lines(ff), l;
36 if(unlikely(lines < 2)) {
37 collector_error("/proc/net/stat/synproxy has %zu lines, expected no less than 2. Disabling it.", lines);
38 return 1;
39 }
40
41 unsigned long long syn_received = 0, cookie_invalid = 0, cookie_valid = 0, cookie_retrans = 0, conn_reopened = 0;
42
43 // synproxy gives its values per CPU
44 for(l = 1; l < lines ;l++) {
45 size_t words = procfile_linewords(ff, l);
46 if(unlikely(words < 6))
47 continue;
48
49 syn_received += strtoull(procfile_lineword(ff, l, 1), NULL, 16);
50 cookie_invalid += strtoull(procfile_lineword(ff, l, 2), NULL, 16);
51 cookie_valid += strtoull(procfile_lineword(ff, l, 3), NULL, 16);
52 cookie_retrans += strtoull(procfile_lineword(ff, l, 4), NULL, 16);
53 conn_reopened += strtoull(procfile_lineword(ff, l, 5), NULL, 16);
54 }
55
56 // --------------------------------------------------------------------
57
58 if (do_syns == CONFIG_BOOLEAN_YES || do_syns == CONFIG_BOOLEAN_AUTO) {
59 do_syns = CONFIG_BOOLEAN_YES;
60
61 static RRDSET *st = NULL;
62 if(unlikely(!st)) {
63 st = rrdset_create_localhost(
64 RRD_TYPE_NET_STAT_NETFILTER
65 , RRD_TYPE_NET_STAT_SYNPROXY "_syn_received"
66 , NULL
67 , RRD_TYPE_NET_STAT_SYNPROXY
68 , NULL
69 , "SYNPROXY SYN Packets received"
70 , "packets/s"
71 , PLUGIN_PROC_NAME
72 , PLUGIN_PROC_MODULE_SYNPROXY_NAME
73 , NETDATA_CHART_PRIO_SYNPROXY_SYN_RECEIVED
74 , update_every
75 , RRDSET_TYPE_LINE
76 );
77
78 rrddim_add(st, "received", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
79 }
80
81 rrddim_set(st, "received", syn_received);
82 rrdset_done(st);
83 }
84
85 // --------------------------------------------------------------------
86
87 if (do_reopened == CONFIG_BOOLEAN_YES || do_reopened == CONFIG_BOOLEAN_AUTO) {
88 do_reopened = CONFIG_BOOLEAN_YES;
89
90 static RRDSET *st = NULL;
91 if(unlikely(!st)) {
92 st = rrdset_create_localhost(
93 RRD_TYPE_NET_STAT_NETFILTER
94 , RRD_TYPE_NET_STAT_SYNPROXY "_conn_reopened"
95 , NULL
96 , RRD_TYPE_NET_STAT_SYNPROXY
97 , NULL
98 , "SYNPROXY Connections Reopened"
99 , "connections/s"
100 , PLUGIN_PROC_NAME
101 , PLUGIN_PROC_MODULE_SYNPROXY_NAME
102 , NETDATA_CHART_PRIO_SYNPROXY_CONN_OPEN
103 , update_every
104 , RRDSET_TYPE_LINE
105 );
106
107 rrddim_add(st, "reopened", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
108 }
109
110 rrddim_set(st, "reopened", conn_reopened);
111 rrdset_done(st);
112 }
113
114 // --------------------------------------------------------------------
115
116 if (do_cookies == CONFIG_BOOLEAN_YES || do_cookies == CONFIG_BOOLEAN_AUTO) {
117 do_cookies = CONFIG_BOOLEAN_YES;
118
119 static RRDSET *st = NULL;
120 if(unlikely(!st)) {
121 st = rrdset_create_localhost(
122 RRD_TYPE_NET_STAT_NETFILTER
123 , RRD_TYPE_NET_STAT_SYNPROXY "_cookies"
124 , NULL
125 , RRD_TYPE_NET_STAT_SYNPROXY
126 , NULL
127 , "SYNPROXY TCP Cookies"
128 , "cookies/s"
129 , PLUGIN_PROC_NAME
130 , PLUGIN_PROC_MODULE_SYNPROXY_NAME
131 , NETDATA_CHART_PRIO_SYNPROXY_COOKIES
132 , update_every
133 , RRDSET_TYPE_LINE
134 );
135
136 rrddim_add(st, "valid", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
137 rrddim_add(st, "invalid", NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL);
138 rrddim_add(st, "retransmits", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
139 }
140
141 rrddim_set(st, "valid", cookie_valid);
142 rrddim_set(st, "invalid", cookie_invalid);
143 rrddim_set(st, "retransmits", cookie_retrans);
144 rrdset_done(st);
145 }
146
147 return 0;
148 }