release/src/router/tor/src/or/status.c

   1 /* Copyright (c) 2010-2013, The Tor Project, Inc. */
   2 /* See LICENSE for licensing information */
   3
   4 /**
   5  * \file status.c
   6  * \brief Keep status information and log the heartbeat messages.
   7  **/
   8
   9 #define STATUS_PRIVATE
  10
  11 #include "or.h"
  12 #include "circuituse.h"
  13 #include "config.h"
  14 #include "status.h"
  15 #include "nodelist.h"
  16 #include "relay.h"
  17 #include "router.h"
  18 #include "circuitlist.h"
  19 #include "main.h"
  20 #include "rephist.h"
  21 #include "hibernate.h"
  22 #include "rephist.h"
  23 #include "statefile.h"
  24
  25 static void log_accounting(const time_t now, const or_options_t *options);
  26
  27 /** Return the total number of circuits. */
  28 STATIC int
  29 count_circuits(void)
  30 {
  31   circuit_t *circ;
  32   int nr=0;
  33
  34   TOR_LIST_FOREACH(circ, circuit_get_global_list(), head)
  35     nr++;
  36
  37   return nr;
  38 }
  39
  40 /** Take seconds <b>secs</b> and return a newly allocated human-readable
  41  * uptime string */
  42 STATIC char *
  43 secs_to_uptime(long secs)
  44 {
  45   long int days = secs / 86400;
  46   int hours = (int)((secs - (days * 86400)) / 3600);
  47   int minutes = (int)((secs - (days * 86400) - (hours * 3600)) / 60);
  48   char *uptime_string = NULL;
  49
  50   switch (days) {
  51   case 0:
  52     tor_asprintf(&uptime_string, "%d:%02d hours", hours, minutes);
  53     break;
  54   case 1:
  55     tor_asprintf(&uptime_string, "%ld day %d:%02d hours",
  56                  days, hours, minutes);
  57     break;
  58   default:
  59     tor_asprintf(&uptime_string, "%ld days %d:%02d hours",
  60                  days, hours, minutes);
  61     break;
  62   }
  63
  64   return uptime_string;
  65 }
  66
  67 /** Take <b>bytes</b> and returns a newly allocated human-readable usage
  68  * string. */
  69 STATIC char *
  70 bytes_to_usage(uint64_t bytes)
  71 {
  72   char *bw_string = NULL;
  73
  74   if (bytes < (1<<20)) { /* Less than a megabyte. */
  75     tor_asprintf(&bw_string, U64_FORMAT" kB", U64_PRINTF_ARG(bytes>>10));
  76   } else if (bytes < (1<<30)) { /* Megabytes. Let's add some precision. */
  77     double bw = U64_TO_DBL(bytes);
  78     tor_asprintf(&bw_string, "%.2f MB", bw/(1<<20));
  79   } else { /* Gigabytes. */
  80     double bw = U64_TO_DBL(bytes);
  81     tor_asprintf(&bw_string, "%.2f GB", bw/(1<<30));
  82   }
  83
  84   return bw_string;
  85 }
  86
  87 /** Log a "heartbeat" message describing Tor's status and history so that the
  88  * user can know that there is indeed a running Tor.  Return 0 on success and
  89  * -1 on failure. */
  90 int
  91 log_heartbeat(time_t now)
  92 {
  93   char *bw_sent = NULL;
  94   char *bw_rcvd = NULL;
  95   char *uptime = NULL;
  96   const routerinfo_t *me;
  97   double r = tls_get_write_overhead_ratio();
  98   const int hibernating = we_are_hibernating();
  99
 100   const or_options_t *options = get_options();
 101   (void)now;
 102
 103   if (public_server_mode(options) && !hibernating) {
 104     /* Let's check if we are in the current cached consensus. */
 105     if (!(me = router_get_my_routerinfo()))
 106       return -1; /* Something stinks, we won't even attempt this. */
 107     else
 108       if (!node_get_by_id(me->cache_info.identity_digest))
 109         log_fn(LOG_NOTICE, LD_HEARTBEAT, "Heartbeat: It seems like we are not "
 110                "in the cached consensus.");
 111   }
 112
 113   uptime = secs_to_uptime(get_uptime());
 114   bw_rcvd = bytes_to_usage(get_bytes_read());
 115   bw_sent = bytes_to_usage(get_bytes_written());
 116
 117   log_fn(LOG_NOTICE, LD_HEARTBEAT, "Heartbeat: Tor's uptime is %s, with %d "
 118          "circuits open. I've sent %s and received %s.%s",
 119          uptime, count_circuits(),bw_sent,bw_rcvd,
 120          hibernating?" We are currently hibernating.":"");
 121
 122   if (server_mode(options) && accounting_is_enabled(options) && !hibernating) {
 123     log_accounting(now, options);
 124   }
 125
 126   if (stats_n_data_cells_packaged && !hibernating)
 127     log_notice(LD_HEARTBEAT, "Average packaged cell fullness: %2.3f%%",
 128         100*(U64_TO_DBL(stats_n_data_bytes_packaged) /
 129              U64_TO_DBL(stats_n_data_cells_packaged*RELAY_PAYLOAD_SIZE)) );
 130
 131   if (r > 1.0) {
 132     double overhead = ( r - 1.0 ) * 100.0;
 133     log_notice(LD_HEARTBEAT, "TLS write overhead: %.f%%", overhead);
 134   }
 135
 136   if (public_server_mode(options))
 137     rep_hist_log_circuit_handshake_stats(now);
 138
 139   circuit_log_ancient_one_hop_circuits(1800);
 140
 141   tor_free(uptime);
 142   tor_free(bw_sent);
 143   tor_free(bw_rcvd);
 144
 145   return 0;
 146 }
 147
 148 static void
 149 log_accounting(const time_t now, const or_options_t *options)
 150 {
 151   or_state_t *state = get_or_state();
 152   char *acc_rcvd = bytes_to_usage(state->AccountingBytesReadInInterval);
 153   char *acc_sent = bytes_to_usage(state->AccountingBytesWrittenInInterval);
 154   char *acc_max = bytes_to_usage(options->AccountingMax);
 155   time_t interval_end = accounting_get_end_time();
 156   char end_buf[ISO_TIME_LEN + 1];
 157   char *remaining = NULL;
 158   format_local_iso_time(end_buf, interval_end);
 159   remaining = secs_to_uptime(interval_end - now);
 160
 161   log_notice(LD_HEARTBEAT, "Heartbeat: Accounting enabled. "
 162       "Sent: %s / %s, Received: %s / %s. The "
 163       "current accounting interval ends on %s, in %s.",
 164       acc_sent, acc_max, acc_rcvd, acc_max, end_buf, remaining);
 165
 166   tor_free(acc_rcvd);
 167   tor_free(acc_sent);
 168   tor_free(acc_max);
 169   tor_free(remaining);
 170 }
 171