tinc-vpn.org Git - tinc/blob - src/top.c

   1 /*
   2     top.c -- Show real-time statistics from a running tincd
   3     Copyright (C) 2011-2013 Guus Sliepen <guus@tinc-vpn.org>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License along
  16     with this program; if not, write to the Free Software Foundation, Inc.,
  17     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "system.h"
  21
  22 #ifdef HAVE_CURSES
  23
  24 #include <curses.h>
  25
  26 #include "control_common.h"
  27 #include "list.h"
  28 #include "names.h"
  29 #include "tincctl.h"
  30 #include "top.h"
  31 #include "xalloc.h"
  32
  33 typedef struct nodestats_t {
  34         char *name;
  35         int i;
  36         uint64_t in_packets;
  37         uint64_t in_bytes;
  38         uint64_t out_packets;
  39         uint64_t out_bytes;
  40         float in_packets_rate;
  41         float in_bytes_rate;
  42         float out_packets_rate;
  43         float out_bytes_rate;
  44         bool known;
  45 } nodestats_t;
  46
  47 static const char *const sortname[] = {
  48         "name",
  49         "in pkts",
  50         "in bytes",
  51         "out pkts",
  52         "out bytes",
  53         "tot pkts",
  54         "tot bytes",
  55 };
  56
  57 static int sortmode = 0;
  58 static bool cumulative = false;
  59
  60 static list_t node_list;
  61 static struct timeval cur, prev, diff;
  62 static int delay = 1000;
  63 static bool changed = true;
  64 static const char *bunit = "bytes";
  65 static float bscale = 1;
  66 static const char *punit = "pkts";
  67 static float pscale = 1;
  68
  69 static void update(int fd) {
  70         sendline(fd, "%d %d", CONTROL, REQ_DUMP_TRAFFIC);
  71         gettimeofday(&cur, NULL);
  72
  73         timersub(&cur, &prev, &diff);
  74         prev = cur;
  75         float interval = diff.tv_sec + diff.tv_usec * 1e-6;
  76
  77         char line[4096];
  78         char name[4096];
  79         int code;
  80         int req;
  81         uint64_t in_packets;
  82         uint64_t in_bytes;
  83         uint64_t out_packets;
  84         uint64_t out_bytes;
  85
  86         for list_each(nodestats_t, ns, &node_list)
  87                 ns->known = false;
  88
  89         while(recvline(fd, line, sizeof line)) {
  90                 int n = sscanf(line, "%d %d %s %"PRIu64" %"PRIu64" %"PRIu64" %"PRIu64, &code, &req, name, &in_packets, &in_bytes, &out_packets, &out_bytes);
  91
  92                 if(n == 2)
  93                         break;
  94
  95                 if(n != 7) {
  96                         endwin();
  97                         fprintf(stderr, "Error receiving traffic information\n");
  98                         exit(1);
  99                 }
 100
 101                 nodestats_t *found = NULL;
 102
 103                 for list_each(nodestats_t, ns, &node_list) {
 104                         int result = strcmp(name, ns->name);
 105                         if(result > 0) {
 106                                 continue;
 107                         } if(result == 0) {
 108                                 found = ns;
 109                                 break;
 110                         } else {
 111                                 found = xzalloc(sizeof *found);
 112                                 found->name = xstrdup(name);
 113                                 list_insert_before(&node_list, node, found);
 114                                 changed = true;
 115                                 break;
 116                         }
 117                 }
 118
 119                 if(!found) {
 120                         found = xzalloc(sizeof *found);
 121                         found->name = xstrdup(name);
 122                         list_insert_tail(&node_list, found);
 123                         changed = true;
 124                 }
 125
 126                 found->known = true;
 127                 found->in_packets_rate = (in_packets - found->in_packets) / interval;
 128                 found->in_bytes_rate = (in_bytes - found->in_bytes) / interval;
 129                 found->out_packets_rate = (out_packets - found->out_packets) / interval;
 130                 found->out_bytes_rate = (out_bytes - found->out_bytes) / interval;
 131                 found->in_packets = in_packets;
 132                 found->in_bytes = in_bytes;
 133                 found->out_packets = out_packets;
 134                 found->out_bytes = out_bytes;
 135         }
 136 }
 137
 138 static int cmpfloat(float a, float b) {
 139         if(a < b)
 140                 return -1;
 141         else if(a > b)
 142                 return 1;
 143         else
 144                 return 0;
 145 }
 146
 147 static int cmpu64(uint64_t a, uint64_t b) {
 148         if(a < b)
 149                 return -1;
 150         else if(a > b)
 151                 return 1;
 152         else
 153                 return 0;
 154 }
 155
 156 static int sortfunc(const void *a, const void *b) {
 157         const nodestats_t *na = *(const nodestats_t **)a;
 158         const nodestats_t *nb = *(const nodestats_t **)b;
 159         switch(sortmode) {
 160                 case 1:
 161                         if(cumulative)
 162                                 return -cmpu64(na->in_packets, nb->in_packets) ?: na->i - nb->i;
 163                         else
 164                                 return -cmpfloat(na->in_packets_rate, nb->in_packets_rate) ?: na->i - nb->i;
 165                 case 2:
 166                         if(cumulative)
 167                                 return -cmpu64(na->in_bytes, nb->in_bytes) ?: na->i - nb->i;
 168                         else
 169                                 return -cmpfloat(na->in_bytes_rate, nb->in_bytes_rate) ?: na->i - nb->i;
 170                 case 3:
 171                         if(cumulative)
 172                                 return -cmpu64(na->out_packets, nb->out_packets) ?: na->i - nb->i;
 173                         else
 174                                 return -cmpfloat(na->out_packets_rate, nb->out_packets_rate) ?: na->i - nb->i;
 175                 case 4:
 176                         if(cumulative)
 177                                 return -cmpu64(na->out_bytes, nb->out_bytes) ?: na->i - nb->i;
 178                         else
 179                                 return -cmpfloat(na->out_bytes_rate, nb->out_bytes_rate) ?: na->i - nb->i;
 180                 case 5:
 181                         if(cumulative)
 182                                 return -cmpu64(na->in_packets + na->out_packets, nb->in_packets + nb->out_packets) ?: na->i - nb->i;
 183                         else
 184                                 return -cmpfloat(na->in_packets_rate + na->out_packets_rate, nb->in_packets_rate + nb->out_packets_rate) ?: na->i - nb->i;
 185                 case 6:
 186                         if(cumulative)
 187                                 return -cmpu64(na->in_bytes + na->out_bytes, nb->in_bytes + nb->out_bytes) ?: na->i - nb->i;
 188                         else
 189                                 return -cmpfloat(na->in_bytes_rate + na->out_bytes_rate, nb->in_bytes_rate + nb->out_bytes_rate) ?: na->i - nb->i;
 190                 default:
 191                         return strcmp(na->name, nb->name) ?: na->i - nb->i;
 192         }
 193 }
 194
 195 static void redraw(void) {
 196         erase();
 197
 198         mvprintw(0, 0, "Tinc %-16s  Nodes: %4d  Sort: %-10s  %s", netname ?: "", node_list.count, sortname[sortmode], cumulative ? "Cumulative" : "Current");
 199         attrset(A_REVERSE);
 200         mvprintw(2, 0, "Node                IN %s   IN %s   OUT %s  OUT %s", punit, bunit, punit, bunit);
 201         chgat(-1, A_REVERSE, 0, NULL);
 202
 203         static nodestats_t **sorted = 0;
 204         static int n = 0;
 205         if(changed) {
 206                 n = 0;
 207                 sorted = xrealloc(sorted, node_list.count * sizeof *sorted);
 208                 for list_each(nodestats_t, ns, &node_list)
 209                         sorted[n++] = ns;
 210                 changed = false;
 211         }
 212
 213         for(int i = 0; i < n; i++)
 214                 sorted[i]->i = i;
 215
 216         qsort(sorted, n, sizeof *sorted, sortfunc);
 217
 218         for(int i = 0, row = 3; i < n; i++, row++) {
 219                 nodestats_t *node = sorted[i];
 220                 if(node->known)
 221                         if(node->in_packets_rate || node->out_packets_rate)
 222                                 attrset(A_BOLD);
 223                         else
 224                                 attrset(A_NORMAL);
 225                 else
 226                         attrset(A_DIM);
 227
 228                 if(cumulative)
 229                         mvprintw(row, 0, "%-16s %10.0f %10.0f %10.0f %10.0f",
 230                                         node->name, node->in_packets * pscale, node->in_bytes * bscale, node->out_packets * pscale, node->out_bytes * bscale);
 231                 else
 232                         mvprintw(row, 0, "%-16s %10.0f %10.0f %10.0f %10.0f",
 233                                         node->name, node->in_packets_rate * pscale, node->in_bytes_rate * bscale, node->out_packets_rate * pscale, node->out_bytes_rate * bscale);
 234         }
 235
 236         attrset(A_NORMAL);
 237         move(1, 0);
 238
 239         refresh();
 240 }
 241
 242 void top(int fd) {
 243         initscr();
 244         timeout(delay);
 245         bool running = true;
 246
 247         while(running) {
 248                 update(fd);
 249                 redraw();
 250
 251                 switch(getch()) {
 252                         case 's': {
 253                                 timeout(-1);
 254                                 float input = delay * 1e-3;
 255                                 mvprintw(1, 0, "Change delay from %.1fs to: ", input);
 256                                 scanw("%f", &input);
 257                                 if(input < 0.1)
 258                                         input = 0.1;
 259                                 delay = input * 1e3;
 260                                 timeout(delay);
 261                                 break;
 262                         }
 263                         case 'c':
 264                                 cumulative = !cumulative;
 265                                 break;
 266                         case 'n':
 267                                 sortmode = 0;
 268                                 break;
 269                         case 'i':
 270                                 sortmode = 2;
 271                                 break;
 272                         case 'I':
 273                                 sortmode = 1;
 274                                 break;
 275                         case 'o':
 276                                 sortmode = 4;
 277                                 break;
 278                         case 'O':
 279                                 sortmode = 3;
 280                                 break;
 281                         case 't':
 282                                 sortmode = 6;
 283                                 break;
 284                         case 'T':
 285                                 sortmode = 5;
 286                                 break;
 287                         case 'b':
 288                                 bunit = "bytes";
 289                                 bscale = 1;
 290                                 punit = "pkts";
 291                                 pscale = 1;
 292                                 break;
 293                         case 'k':
 294                                 bunit = "kbyte";
 295                                 bscale = 1e-3;
 296                                 punit = "pkts";
 297                                 pscale = 1;
 298                                 break;
 299                         case 'M':
 300                                 bunit = "Mbyte";
 301                                 bscale = 1e-6;
 302                                 punit = "kpkt";
 303                                 pscale = 1e-3;
 304                                 break;
 305                         case 'G':
 306                                 bunit = "Gbyte";
 307                                 bscale = 1e-9;
 308                                 punit = "Mpkt";
 309                                 pscale = 1e-6;
 310                                 break;
 311                         case 'q':
 312                         case KEY_BREAK:
 313                                 running = false;
 314                                 break;
 315                         default:
 316                                 break;
 317                 }
 318         }
 319
 320         endwin();
 321 }
 322
 323 #endif