src/proc_net_stat_synproxy.c

   1 #include "common.h"
   2
   3 #define RRD_TYPE_NET_STAT_NETFILTER         "netfilter"
   4 #define RRD_TYPE_NET_STAT_SYNPROXY          "synproxy"
   5
   6 int do_proc_net_stat_synproxy(int update_every, usec_t dt) {
   7     (void)dt;
   8
   9     static int do_entries = -1, do_cookies = -1, do_syns = -1, do_reopened = -1;
  10     static procfile *ff = NULL;
  11
  12     if(unlikely(do_entries == -1)) {
  13         do_entries  = config_get_boolean_ondemand("plugin:proc:/proc/net/stat/synproxy", "SYNPROXY entries", CONFIG_BOOLEAN_AUTO);
  14         do_cookies  = config_get_boolean_ondemand("plugin:proc:/proc/net/stat/synproxy", "SYNPROXY cookies", CONFIG_BOOLEAN_AUTO);
  15         do_syns     = config_get_boolean_ondemand("plugin:proc:/proc/net/stat/synproxy", "SYNPROXY SYN received", CONFIG_BOOLEAN_AUTO);
  16         do_reopened = config_get_boolean_ondemand("plugin:proc:/proc/net/stat/synproxy", "SYNPROXY connections reopened", CONFIG_BOOLEAN_AUTO);
  17     }
  18
  19     if(unlikely(!ff)) {
  20         char filename[FILENAME_MAX + 1];
  21         snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/net/stat/synproxy");
  22         ff = procfile_open(config_get("plugin:proc:/proc/net/stat/synproxy", "filename to monitor", filename), " \t,:|", PROCFILE_FLAG_DEFAULT);
  23         if(unlikely(!ff))
  24             return 1;
  25     }
  26
  27     ff = procfile_readall(ff);
  28     if(unlikely(!ff))
  29         return 0; // we return 0, so that we will retry to open it next time
  30
  31     // make sure we have 3 lines
  32     size_t lines = procfile_lines(ff), l;
  33     if(unlikely(lines < 2)) {
  34         error("/proc/net/stat/synproxy has %zu lines, expected no less than 2. Disabling it.", lines);
  35         return 1;
  36     }
  37
  38     unsigned long long entries = 0, syn_received = 0, cookie_invalid = 0, cookie_valid = 0, cookie_retrans = 0, conn_reopened = 0;
  39
  40     // synproxy gives its values per CPU
  41     for(l = 1; l < lines ;l++) {
  42         size_t words = procfile_linewords(ff, l);
  43         if(unlikely(words < 6))
  44             continue;
  45
  46         entries         += strtoull(procfile_lineword(ff, l, 0), NULL, 16);
  47         syn_received    += strtoull(procfile_lineword(ff, l, 1), NULL, 16);
  48         cookie_invalid  += strtoull(procfile_lineword(ff, l, 2), NULL, 16);
  49         cookie_valid    += strtoull(procfile_lineword(ff, l, 3), NULL, 16);
  50         cookie_retrans  += strtoull(procfile_lineword(ff, l, 4), NULL, 16);
  51         conn_reopened   += strtoull(procfile_lineword(ff, l, 5), NULL, 16);
  52     }
  53
  54     unsigned long long events = entries + syn_received + cookie_invalid + cookie_valid + cookie_retrans + conn_reopened;
  55
  56     RRDSET *st;
  57
  58     // --------------------------------------------------------------------
  59
  60     if((do_entries == CONFIG_BOOLEAN_AUTO && events) || do_entries == CONFIG_BOOLEAN_YES) {
  61         do_entries = CONFIG_BOOLEAN_YES;
  62
  63         st = rrdset_find_localhost(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_SYNPROXY "_entries");
  64         if(unlikely(!st)) {
  65             st = rrdset_create_localhost(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_SYNPROXY "_entries", NULL
  66                                          , RRD_TYPE_NET_STAT_SYNPROXY, NULL, "SYNPROXY Entries Used", "entries", 3304
  67                                          , update_every, RRDSET_TYPE_LINE);
  68
  69             rrddim_add(st, "entries", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
  70         }
  71         else rrdset_next(st);
  72
  73         rrddim_set(st, "entries", entries);
  74         rrdset_done(st);
  75     }
  76
  77     // --------------------------------------------------------------------
  78
  79     if((do_syns == CONFIG_BOOLEAN_AUTO && events) || do_syns == CONFIG_BOOLEAN_YES) {
  80         do_syns = CONFIG_BOOLEAN_YES;
  81
  82         st = rrdset_find_localhost(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_SYNPROXY "_syn_received");
  83         if(unlikely(!st)) {
  84             st = rrdset_create_localhost(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_SYNPROXY "_syn_received", NULL
  85                                          , RRD_TYPE_NET_STAT_SYNPROXY, NULL, "SYNPROXY SYN Packets received", "SYN/s"
  86                                          , 3301, update_every, RRDSET_TYPE_LINE);
  87
  88             rrddim_add(st, "received", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
  89         }
  90         else rrdset_next(st);
  91
  92         rrddim_set(st, "received", syn_received);
  93         rrdset_done(st);
  94     }
  95
  96     // --------------------------------------------------------------------
  97
  98     if((do_reopened == CONFIG_BOOLEAN_AUTO && events) || do_reopened == CONFIG_BOOLEAN_YES) {
  99         do_reopened = CONFIG_BOOLEAN_YES;
 100
 101         st = rrdset_find_localhost(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_SYNPROXY "_conn_reopened");
 102         if(unlikely(!st)) {
 103             st = rrdset_create_localhost(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_SYNPROXY "_conn_reopened", NULL
 104                                          , RRD_TYPE_NET_STAT_SYNPROXY, NULL, "SYNPROXY Connections Reopened"
 105                                          , "connections/s", 3303, update_every, RRDSET_TYPE_LINE);
 106
 107             rrddim_add(st, "reopened", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
 108         }
 109         else rrdset_next(st);
 110
 111         rrddim_set(st, "reopened", conn_reopened);
 112         rrdset_done(st);
 113     }
 114
 115     // --------------------------------------------------------------------
 116
 117     if((do_cookies == CONFIG_BOOLEAN_AUTO && events) || do_cookies == CONFIG_BOOLEAN_YES) {
 118         do_cookies = CONFIG_BOOLEAN_YES;
 119
 120         st = rrdset_find_localhost(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_SYNPROXY "_cookies");
 121         if(unlikely(!st)) {
 122             st = rrdset_create_localhost(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_SYNPROXY "_cookies", NULL
 123                                          , RRD_TYPE_NET_STAT_SYNPROXY, NULL, "SYNPROXY TCP Cookies", "cookies/s", 3302
 124                                          , update_every, RRDSET_TYPE_LINE);
 125
 126             rrddim_add(st, "valid", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
 127             rrddim_add(st, "invalid", NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL);
 128             rrddim_add(st, "retransmits", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
 129         }
 130         else rrdset_next(st);
 131
 132         rrddim_set(st, "valid", cookie_valid);
 133         rrddim_set(st, "invalid", cookie_invalid);
 134         rrddim_set(st, "retransmits", cookie_retrans);
 135         rrdset_done(st);
 136     }
 137
 138     return 0;
 139 }