src/proc_net_snmp.c

   1 #include <inttypes.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5
   6 #include "common.h"
   7 #include "log.h"
   8 #include "config.h"
   9 #include "procfile.h"
  10 #include "rrd.h"
  11 #include "plugin_proc.h"
  12
  13 #define RRD_TYPE_NET_SNMP                       "ipv4"
  14 #define RRD_TYPE_NET_SNMP_LEN           strlen(RRD_TYPE_NET_SNMP)
  15
  16 int do_proc_net_snmp(int update_every, unsigned long long dt) {
  17         static procfile *ff = NULL;
  18         static int do_ip_packets = -1, do_ip_fragsout = -1, do_ip_fragsin = -1, do_ip_errors = -1,
  19                 do_tcp_sockets = -1, do_tcp_packets = -1, do_tcp_errors = -1, do_tcp_handshake = -1,
  20                 do_udp_packets = -1, do_udp_errors = -1;
  21
  22         if(do_ip_packets == -1)         do_ip_packets           = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 packets", 1);
  23         if(do_ip_fragsout == -1)        do_ip_fragsout          = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 fragrments sent", 1);
  24         if(do_ip_fragsin == -1)         do_ip_fragsin           = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 fragments assembly", 1);
  25         if(do_ip_errors == -1)          do_ip_errors            = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 errors", 1);
  26         if(do_tcp_sockets == -1)        do_tcp_sockets          = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 TCP connections", 1);
  27         if(do_tcp_packets == -1)        do_tcp_packets          = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 TCP packets", 1);
  28         if(do_tcp_errors == -1)         do_tcp_errors           = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 TCP errors", 1);
  29         if(do_tcp_handshake == -1)      do_tcp_handshake        = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 TCP handshake issues", 1);
  30         if(do_udp_packets == -1)        do_udp_packets          = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 UDP packets", 1);
  31         if(do_udp_errors == -1)         do_udp_errors           = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 UDP errors", 1);
  32
  33         if(dt) {};
  34
  35         if(!ff) {
  36                 char filename[FILENAME_MAX + 1];
  37                 snprintf(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/net/snmp");
  38                 ff = procfile_open(config_get("plugin:proc:/proc/net/snmp", "filename to monitor", filename), " \t:", PROCFILE_FLAG_DEFAULT);
  39         }
  40         if(!ff) return 1;
  41
  42         ff = procfile_readall(ff);
  43         if(!ff) return 0; // we return 0, so that we will retry to open it next time
  44
  45         uint32_t lines = procfile_lines(ff), l;
  46         uint32_t words;
  47
  48         RRDSET *st;
  49
  50         for(l = 0; l < lines ;l++) {
  51                 if(strcmp(procfile_lineword(ff, l, 0), "Ip") == 0) {
  52                         l++;
  53
  54                         if(strcmp(procfile_lineword(ff, l, 0), "Ip") != 0) {
  55                                 error("Cannot read Ip line from /proc/net/snmp.");
  56                                 break;
  57                         }
  58
  59                         words = procfile_linewords(ff, l);
  60                         if(words < 20) {
  61                                 error("Cannot read /proc/net/snmp Ip line. Expected 20 params, read %d.", words);
  62                                 continue;
  63                         }
  64
  65                         // see also http://net-snmp.sourceforge.net/docs/mibs/ip.html
  66                         unsigned long long Forwarding, DefaultTTL, InReceives, InHdrErrors, InAddrErrors, ForwDatagrams, InUnknownProtos, InDiscards, InDelivers,
  67                                 OutRequests, OutDiscards, OutNoRoutes, ReasmTimeout, ReasmReqds, ReasmOKs, ReasmFails, FragOKs, FragFails, FragCreates;
  68
  69                         Forwarding              = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
  70                         DefaultTTL              = strtoull(procfile_lineword(ff, l, 2), NULL, 10);
  71                         InReceives              = strtoull(procfile_lineword(ff, l, 3), NULL, 10);
  72                         InHdrErrors             = strtoull(procfile_lineword(ff, l, 4), NULL, 10);
  73                         InAddrErrors    = strtoull(procfile_lineword(ff, l, 5), NULL, 10);
  74                         ForwDatagrams   = strtoull(procfile_lineword(ff, l, 6), NULL, 10);
  75                         InUnknownProtos = strtoull(procfile_lineword(ff, l, 7), NULL, 10);
  76                         InDiscards              = strtoull(procfile_lineword(ff, l, 8), NULL, 10);
  77                         InDelivers              = strtoull(procfile_lineword(ff, l, 9), NULL, 10);
  78                         OutRequests             = strtoull(procfile_lineword(ff, l, 10), NULL, 10);
  79                         OutDiscards             = strtoull(procfile_lineword(ff, l, 11), NULL, 10);
  80                         OutNoRoutes             = strtoull(procfile_lineword(ff, l, 12), NULL, 10);
  81                         ReasmTimeout    = strtoull(procfile_lineword(ff, l, 13), NULL, 10);
  82                         ReasmReqds              = strtoull(procfile_lineword(ff, l, 14), NULL, 10);
  83                         ReasmOKs                = strtoull(procfile_lineword(ff, l, 15), NULL, 10);
  84                         ReasmFails              = strtoull(procfile_lineword(ff, l, 16), NULL, 10);
  85                         FragOKs                 = strtoull(procfile_lineword(ff, l, 17), NULL, 10);
  86                         FragFails               = strtoull(procfile_lineword(ff, l, 18), NULL, 10);
  87                         FragCreates             = strtoull(procfile_lineword(ff, l, 19), NULL, 10);
  88
  89                         // these are not counters
  90                         if(Forwarding) {};              // is forwarding enabled?
  91                         if(DefaultTTL) {};              // the default ttl on packets
  92                         if(ReasmTimeout) {};    // reassemply timeout
  93
  94                         // this counter is not used
  95                         if(InDelivers) {};              // total number of packets delivered to IP user-protcols
  96
  97                         // --------------------------------------------------------------------
  98
  99                         if(do_ip_packets) {
 100                                 st = rrdset_find(RRD_TYPE_NET_SNMP ".packets");
 101                                 if(!st) {
 102                                         st = rrdset_create(RRD_TYPE_NET_SNMP, "packets", NULL, RRD_TYPE_NET_SNMP, "IPv4 Packets", "packets/s", 3000, update_every, RRDSET_TYPE_LINE);
 103
 104                                         rrddim_add(st, "received", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 105                                         rrddim_add(st, "sent", NULL, -1, 1 * update_every, RRDDIM_INCREMENTAL);
 106                                         rrddim_add(st, "forwarded", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 107                                 }
 108                                 else rrdset_next(st);
 109
 110                                 rrddim_set(st, "sent", OutRequests);
 111                                 rrddim_set(st, "received", InReceives);
 112                                 rrddim_set(st, "forwarded", ForwDatagrams);
 113                                 rrdset_done(st);
 114                         }
 115
 116                         // --------------------------------------------------------------------
 117
 118                         if(do_ip_fragsout) {
 119                                 st = rrdset_find(RRD_TYPE_NET_SNMP ".fragsout");
 120                                 if(!st) {
 121                                         st = rrdset_create(RRD_TYPE_NET_SNMP, "fragsout", NULL, RRD_TYPE_NET_SNMP, "IPv4 Fragments Sent", "packets/s", 3010, update_every, RRDSET_TYPE_LINE);
 122                                         st->isdetail = 1;
 123
 124                                         rrddim_add(st, "ok", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 125                                         rrddim_add(st, "failed", NULL, -1, 1 * update_every, RRDDIM_INCREMENTAL);
 126                                         rrddim_add(st, "all", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 127                                 }
 128                                 else rrdset_next(st);
 129
 130                                 rrddim_set(st, "ok", FragOKs);
 131                                 rrddim_set(st, "failed", FragFails);
 132                                 rrddim_set(st, "all", FragCreates);
 133                                 rrdset_done(st);
 134                         }
 135
 136                         // --------------------------------------------------------------------
 137
 138                         if(do_ip_fragsin) {
 139                                 st = rrdset_find(RRD_TYPE_NET_SNMP ".fragsin");
 140                                 if(!st) {
 141                                         st = rrdset_create(RRD_TYPE_NET_SNMP, "fragsin", NULL, RRD_TYPE_NET_SNMP, "IPv4 Fragments Reassembly", "packets/s", 3011, update_every, RRDSET_TYPE_LINE);
 142                                         st->isdetail = 1;
 143
 144                                         rrddim_add(st, "ok", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 145                                         rrddim_add(st, "failed", NULL, -1, 1 * update_every, RRDDIM_INCREMENTAL);
 146                                         rrddim_add(st, "all", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 147                                 }
 148                                 else rrdset_next(st);
 149
 150                                 rrddim_set(st, "ok", ReasmOKs);
 151                                 rrddim_set(st, "failed", ReasmFails);
 152                                 rrddim_set(st, "all", ReasmReqds);
 153                                 rrdset_done(st);
 154                         }
 155
 156                         // --------------------------------------------------------------------
 157
 158                         if(do_ip_errors) {
 159                                 st = rrdset_find(RRD_TYPE_NET_SNMP ".errors");
 160                                 if(!st) {
 161                                         st = rrdset_create(RRD_TYPE_NET_SNMP, "errors", NULL, RRD_TYPE_NET_SNMP, "IPv4 Errors", "packets/s", 3002, update_every, RRDSET_TYPE_LINE);
 162                                         st->isdetail = 1;
 163
 164                                         rrddim_add(st, "InDiscards", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 165                                         rrddim_add(st, "OutDiscards", NULL, -1, 1 * update_every, RRDDIM_INCREMENTAL);
 166
 167                                         rrddim_add(st, "InHdrErrors", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 168                                         rrddim_add(st, "InAddrErrors", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 169                                         rrddim_add(st, "InUnknownProtos", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 170
 171                                         rrddim_add(st, "OutNoRoutes", NULL, -1, 1 * update_every, RRDDIM_INCREMENTAL);
 172                                 }
 173                                 else rrdset_next(st);
 174
 175                                 rrddim_set(st, "InDiscards", InDiscards);
 176                                 rrddim_set(st, "OutDiscards", OutDiscards);
 177                                 rrddim_set(st, "InHdrErrors", InHdrErrors);
 178                                 rrddim_set(st, "InAddrErrors", InAddrErrors);
 179                                 rrddim_set(st, "InUnknownProtos", InUnknownProtos);
 180                                 rrddim_set(st, "OutNoRoutes", OutNoRoutes);
 181                                 rrdset_done(st);
 182                         }
 183                 }
 184                 else if(strcmp(procfile_lineword(ff, l, 0), "Tcp") == 0) {
 185                         l++;
 186
 187                         if(strcmp(procfile_lineword(ff, l, 0), "Tcp") != 0) {
 188                                 error("Cannot read Tcp line from /proc/net/snmp.");
 189                                 break;
 190                         }
 191
 192                         words = procfile_linewords(ff, l);
 193                         if(words < 15) {
 194                                 error("Cannot read /proc/net/snmp Tcp line. Expected 15 params, read %d.", words);
 195                                 continue;
 196                         }
 197
 198                         unsigned long long RtoAlgorithm, RtoMin, RtoMax, MaxConn, ActiveOpens, PassiveOpens, AttemptFails, EstabResets,
 199                                 CurrEstab, InSegs, OutSegs, RetransSegs, InErrs, OutRsts;
 200
 201                         RtoAlgorithm    = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
 202                         RtoMin                  = strtoull(procfile_lineword(ff, l, 2), NULL, 10);
 203                         RtoMax                  = strtoull(procfile_lineword(ff, l, 3), NULL, 10);
 204                         MaxConn                 = strtoull(procfile_lineword(ff, l, 4), NULL, 10);
 205                         ActiveOpens             = strtoull(procfile_lineword(ff, l, 5), NULL, 10);
 206                         PassiveOpens    = strtoull(procfile_lineword(ff, l, 6), NULL, 10);
 207                         AttemptFails    = strtoull(procfile_lineword(ff, l, 7), NULL, 10);
 208                         EstabResets             = strtoull(procfile_lineword(ff, l, 8), NULL, 10);
 209                         CurrEstab               = strtoull(procfile_lineword(ff, l, 9), NULL, 10);
 210                         InSegs                  = strtoull(procfile_lineword(ff, l, 10), NULL, 10);
 211                         OutSegs                 = strtoull(procfile_lineword(ff, l, 11), NULL, 10);
 212                         RetransSegs             = strtoull(procfile_lineword(ff, l, 12), NULL, 10);
 213                         InErrs                  = strtoull(procfile_lineword(ff, l, 13), NULL, 10);
 214                         OutRsts                 = strtoull(procfile_lineword(ff, l, 14), NULL, 10);
 215
 216                         // these are not counters
 217                         if(RtoAlgorithm) {};
 218                         if(RtoMin) {};
 219                         if(RtoMax) {};
 220                         if(MaxConn) {};
 221
 222                         // --------------------------------------------------------------------
 223
 224                         // see http://net-snmp.sourceforge.net/docs/mibs/tcp.html
 225                         if(do_tcp_sockets) {
 226                                 st = rrdset_find(RRD_TYPE_NET_SNMP ".tcpsock");
 227                                 if(!st) {
 228                                         st = rrdset_create(RRD_TYPE_NET_SNMP, "tcpsock", NULL, "tcp", "IPv4 TCP Connections", "active connections", 2500, update_every, RRDSET_TYPE_LINE);
 229
 230                                         rrddim_add(st, "connections", NULL, 1, 1, RRDDIM_ABSOLUTE);
 231                                 }
 232                                 else rrdset_next(st);
 233
 234                                 rrddim_set(st, "connections", CurrEstab);
 235                                 rrdset_done(st);
 236                         }
 237
 238                         // --------------------------------------------------------------------
 239
 240                         if(do_tcp_packets) {
 241                                 st = rrdset_find(RRD_TYPE_NET_SNMP ".tcppackets");
 242                                 if(!st) {
 243                                         st = rrdset_create(RRD_TYPE_NET_SNMP, "tcppackets", NULL, "tcp", "IPv4 TCP Packets", "packets/s", 2600, update_every, RRDSET_TYPE_LINE);
 244
 245                                         rrddim_add(st, "received", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 246                                         rrddim_add(st, "sent", NULL, -1, 1 * update_every, RRDDIM_INCREMENTAL);
 247                                 }
 248                                 else rrdset_next(st);
 249
 250                                 rrddim_set(st, "received", InSegs);
 251                                 rrddim_set(st, "sent", OutSegs);
 252                                 rrdset_done(st);
 253                         }
 254
 255                         // --------------------------------------------------------------------
 256
 257                         if(do_tcp_errors) {
 258                                 st = rrdset_find(RRD_TYPE_NET_SNMP ".tcperrors");
 259                                 if(!st) {
 260                                         st = rrdset_create(RRD_TYPE_NET_SNMP, "tcperrors", NULL, "tcp", "IPv4 TCP Errors", "packets/s", 2700, update_every, RRDSET_TYPE_LINE);
 261                                         st->isdetail = 1;
 262
 263                                         rrddim_add(st, "InErrs", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 264                                         rrddim_add(st, "RetransSegs", NULL, -1, 1 * update_every, RRDDIM_INCREMENTAL);
 265                                 }
 266                                 else rrdset_next(st);
 267
 268                                 rrddim_set(st, "InErrs", InErrs);
 269                                 rrddim_set(st, "RetransSegs", RetransSegs);
 270                                 rrdset_done(st);
 271                         }
 272
 273                         // --------------------------------------------------------------------
 274
 275                         if(do_tcp_handshake) {
 276                                 st = rrdset_find(RRD_TYPE_NET_SNMP ".tcphandshake");
 277                                 if(!st) {
 278                                         st = rrdset_create(RRD_TYPE_NET_SNMP, "tcphandshake", NULL, "tcp", "IPv4 TCP Handshake Issues", "events/s", 2900, update_every, RRDSET_TYPE_LINE);
 279                                         st->isdetail = 1;
 280
 281                                         rrddim_add(st, "EstabResets", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 282                                         rrddim_add(st, "OutRsts", NULL, -1, 1 * update_every, RRDDIM_INCREMENTAL);
 283                                         rrddim_add(st, "ActiveOpens", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 284                                         rrddim_add(st, "PassiveOpens", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 285                                         rrddim_add(st, "AttemptFails", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 286                                 }
 287                                 else rrdset_next(st);
 288
 289                                 rrddim_set(st, "EstabResets", EstabResets);
 290                                 rrddim_set(st, "OutRsts", OutRsts);
 291                                 rrddim_set(st, "ActiveOpens", ActiveOpens);
 292                                 rrddim_set(st, "PassiveOpens", PassiveOpens);
 293                                 rrddim_set(st, "AttemptFails", AttemptFails);
 294                                 rrdset_done(st);
 295                         }
 296                 }
 297                 else if(strcmp(procfile_lineword(ff, l, 0), "Udp") == 0) {
 298                         l++;
 299
 300                         if(strcmp(procfile_lineword(ff, l, 0), "Udp") != 0) {
 301                                 error("Cannot read Udp line from /proc/net/snmp.");
 302                                 break;
 303                         }
 304
 305                         words = procfile_linewords(ff, l);
 306                         if(words < 7) {
 307                                 error("Cannot read /proc/net/snmp Udp line. Expected 7 params, read %d.", words);
 308                                 continue;
 309                         }
 310
 311                         unsigned long long InDatagrams, NoPorts, InErrors, OutDatagrams, RcvbufErrors, SndbufErrors;
 312
 313                         InDatagrams             = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
 314                         NoPorts                 = strtoull(procfile_lineword(ff, l, 2), NULL, 10);
 315                         InErrors                = strtoull(procfile_lineword(ff, l, 3), NULL, 10);
 316                         OutDatagrams    = strtoull(procfile_lineword(ff, l, 4), NULL, 10);
 317                         RcvbufErrors    = strtoull(procfile_lineword(ff, l, 5), NULL, 10);
 318                         SndbufErrors    = strtoull(procfile_lineword(ff, l, 6), NULL, 10);
 319
 320                         // --------------------------------------------------------------------
 321
 322                         // see http://net-snmp.sourceforge.net/docs/mibs/udp.html
 323                         if(do_udp_packets) {
 324                                 st = rrdset_find(RRD_TYPE_NET_SNMP ".udppackets");
 325                                 if(!st) {
 326                                         st = rrdset_create(RRD_TYPE_NET_SNMP, "udppackets", NULL, "udp", "IPv4 UDP Packets", "packets/s", 2601, update_every, RRDSET_TYPE_LINE);
 327
 328                                         rrddim_add(st, "received", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 329                                         rrddim_add(st, "sent", NULL, -1, 1 * update_every, RRDDIM_INCREMENTAL);
 330                                 }
 331                                 else rrdset_next(st);
 332
 333                                 rrddim_set(st, "received", InDatagrams);
 334                                 rrddim_set(st, "sent", OutDatagrams);
 335                                 rrdset_done(st);
 336                         }
 337
 338                         // --------------------------------------------------------------------
 339
 340                         if(do_udp_errors) {
 341                                 st = rrdset_find(RRD_TYPE_NET_SNMP ".udperrors");
 342                                 if(!st) {
 343                                         st = rrdset_create(RRD_TYPE_NET_SNMP, "udperrors", NULL, "udp", "IPv4 UDP Errors", "events/s", 2701, update_every, RRDSET_TYPE_LINE);
 344                                         st->isdetail = 1;
 345
 346                                         rrddim_add(st, "RcvbufErrors", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 347                                         rrddim_add(st, "SndbufErrors", NULL, -1, 1 * update_every, RRDDIM_INCREMENTAL);
 348                                         rrddim_add(st, "InErrors", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 349                                         rrddim_add(st, "NoPorts", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 350                                 }
 351                                 else rrdset_next(st);
 352
 353                                 rrddim_set(st, "InErrors", InErrors);
 354                                 rrddim_set(st, "NoPorts", NoPorts);
 355                                 rrddim_set(st, "RcvbufErrors", RcvbufErrors);
 356                                 rrddim_set(st, "SndbufErrors", SndbufErrors);
 357                                 rrdset_done(st);
 358                         }
 359                 }
 360         }
 361
 362         return 0;
 363 }
 364