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 #define RRD_TYPE_NET_STAT_SYNPROXY_LEN          strlen(RRD_TYPE_NET_STAT_SYNPROXY)
   6
   7 int do_proc_net_stat_synproxy(int update_every, unsigned long long dt) {
   8         static int do_entries = -1, do_cookies = -1, do_syns = -1, do_reopened = -1;
   9         static procfile *ff = NULL;
  10
  11         if(do_entries == -1)    do_entries      = config_get_boolean_ondemand("plugin:proc:/proc/net/stat/synproxy", "SYNPROXY entries", CONFIG_ONDEMAND_ONDEMAND);
  12         if(do_cookies == -1)    do_cookies      = config_get_boolean_ondemand("plugin:proc:/proc/net/stat/synproxy", "SYNPROXY cookies", CONFIG_ONDEMAND_ONDEMAND);
  13         if(do_syns == -1)               do_syns         = config_get_boolean_ondemand("plugin:proc:/proc/net/stat/synproxy", "SYNPROXY SYN received", CONFIG_ONDEMAND_ONDEMAND);
  14         if(do_reopened == -1)   do_reopened = config_get_boolean_ondemand("plugin:proc:/proc/net/stat/synproxy", "SYNPROXY connections reopened", CONFIG_ONDEMAND_ONDEMAND);
  15
  16         if(dt) {};
  17
  18         if(!ff) {
  19                 char filename[FILENAME_MAX + 1];
  20                 snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/net/stat/synproxy");
  21                 ff = procfile_open(config_get("plugin:proc:/proc/net/stat/synproxy", "filename to monitor", filename), " \t,:|", PROCFILE_FLAG_DEFAULT);
  22         }
  23         if(!ff) return 1;
  24
  25         ff = procfile_readall(ff);
  26         if(!ff) return 0; // we return 0, so that we will retry to open it next time
  27
  28         // make sure we have 3 lines
  29         size_t lines = procfile_lines(ff), l;
  30         if(lines < 2) {
  31                 error("/proc/net/stat/synproxy has %zu lines, expected no less than 2. Disabling it.", lines);
  32                 return 1;
  33         }
  34
  35         unsigned long long entries = 0, syn_received = 0, cookie_invalid = 0, cookie_valid = 0, cookie_retrans = 0, conn_reopened = 0;
  36
  37         // synproxy gives its values per CPU
  38         for(l = 1; l < lines ;l++) {
  39                 int words = procfile_linewords(ff, l);
  40                 if(words < 6) continue;
  41
  42                 entries                 += strtoull(procfile_lineword(ff, l, 0), NULL, 16);
  43                 syn_received    += strtoull(procfile_lineword(ff, l, 1), NULL, 16);
  44                 cookie_invalid  += strtoull(procfile_lineword(ff, l, 2), NULL, 16);
  45                 cookie_valid    += strtoull(procfile_lineword(ff, l, 3), NULL, 16);
  46                 cookie_retrans  += strtoull(procfile_lineword(ff, l, 4), NULL, 16);
  47                 conn_reopened   += strtoull(procfile_lineword(ff, l, 5), NULL, 16);
  48         }
  49
  50         unsigned long long events = entries + syn_received + cookie_invalid + cookie_valid + cookie_retrans + conn_reopened;
  51
  52         RRDSET *st;
  53
  54         // --------------------------------------------------------------------
  55
  56         if((do_entries == CONFIG_ONDEMAND_ONDEMAND && events) || do_entries == CONFIG_ONDEMAND_YES) {
  57                 do_entries = CONFIG_ONDEMAND_YES;
  58
  59                 st = rrdset_find(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_SYNPROXY "_entries");
  60                 if(!st) {
  61                         st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_SYNPROXY "_entries", NULL, RRD_TYPE_NET_STAT_SYNPROXY, NULL, "SYNPROXY Entries Used", "entries", 1004, update_every, RRDSET_TYPE_LINE);
  62
  63                         rrddim_add(st, "entries", NULL, 1, 1, RRDDIM_ABSOLUTE);
  64                 }
  65                 else rrdset_next(st);
  66
  67                 rrddim_set(st, "entries", entries);
  68                 rrdset_done(st);
  69         }
  70
  71         // --------------------------------------------------------------------
  72
  73         if((do_syns == CONFIG_ONDEMAND_ONDEMAND && events) || do_syns == CONFIG_ONDEMAND_YES) {
  74                 do_syns = CONFIG_ONDEMAND_YES;
  75
  76                 st = rrdset_find(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_SYNPROXY "_syn_received");
  77                 if(!st) {
  78                         st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_SYNPROXY "_syn_received", NULL, RRD_TYPE_NET_STAT_SYNPROXY, NULL, "SYNPROXY SYN Packets received", "SYN/s", 1001, update_every, RRDSET_TYPE_LINE);
  79
  80                         rrddim_add(st, "received", NULL, 1, 1, RRDDIM_INCREMENTAL);
  81                 }
  82                 else rrdset_next(st);
  83
  84                 rrddim_set(st, "received", syn_received);
  85                 rrdset_done(st);
  86         }
  87
  88         // --------------------------------------------------------------------
  89
  90         if((do_reopened == CONFIG_ONDEMAND_ONDEMAND && events) || do_reopened == CONFIG_ONDEMAND_YES) {
  91                 do_reopened = CONFIG_ONDEMAND_YES;
  92
  93                 st = rrdset_find(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_SYNPROXY "_conn_reopened");
  94                 if(!st) {
  95                         st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_SYNPROXY "_conn_reopened", NULL, RRD_TYPE_NET_STAT_SYNPROXY, NULL, "SYNPROXY Connections Reopened", "connections/s", 1003, update_every, RRDSET_TYPE_LINE);
  96
  97                         rrddim_add(st, "reopened", NULL, 1, 1, RRDDIM_INCREMENTAL);
  98                 }
  99                 else rrdset_next(st);
 100
 101                 rrddim_set(st, "reopened", conn_reopened);
 102                 rrdset_done(st);
 103         }
 104
 105         // --------------------------------------------------------------------
 106
 107         if((do_cookies == CONFIG_ONDEMAND_ONDEMAND && events) || do_cookies == CONFIG_ONDEMAND_YES) {
 108                 do_cookies = CONFIG_ONDEMAND_YES;
 109
 110                 st = rrdset_find(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_SYNPROXY "_cookies");
 111                 if(!st) {
 112                         st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_SYNPROXY "_cookies", NULL, RRD_TYPE_NET_STAT_SYNPROXY, NULL, "SYNPROXY TCP Cookies", "cookies/s", 1002, update_every, RRDSET_TYPE_LINE);
 113
 114                         rrddim_add(st, "valid", NULL, 1, 1, RRDDIM_INCREMENTAL);
 115                         rrddim_add(st, "invalid", NULL, -1, 1, RRDDIM_INCREMENTAL);
 116                         rrddim_add(st, "retransmits", NULL, 1, 1, RRDDIM_INCREMENTAL);
 117                 }
 118                 else rrdset_next(st);
 119
 120                 rrddim_set(st, "valid", cookie_valid);
 121                 rrddim_set(st, "invalid", cookie_invalid);
 122                 rrddim_set(st, "retransmits", cookie_retrans);
 123                 rrdset_done(st);
 124         }
 125
 126         return 0;
 127 }