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 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 "tincctl.h"
  29 #include "top.h"
  30 #include "xalloc.h"
  31
  32 typedef struct nodestats_t {
  33         char *name;
  34         int i;
  35         uint64_t in_packets;
  36         uint64_t in_bytes;
  37         uint64_t out_packets;
  38         uint64_t out_bytes;
  39         float in_packets_rate;
  40         float in_bytes_rate;
  41         float out_packets_rate;
  42         float out_bytes_rate;
  43         bool known;
  44 } nodestats_t;
  45
  46 static const char *const sortname[] = {
  47         "name",
  48         "in pkts",
  49         "in bytes",
  50         "out pkts",
  51         "out bytes",
  52         "tot pkts",
  53         "tot bytes",
  54 };
  55
  56 static int sortmode = 0;
  57 static bool cumulative = false;
  58
  59 static list_t node_list;
  60 static struct timeval now, prev, diff;
  61 static int delay = 1000;
  62 static bool running = true;
  63 static bool changed = true;
  64 static const char *unit = "bytes";
  65 static float scale = 1;
  66
  67 #ifndef timersub
  68 #define timersub(a, b, c) do {(c)->tv_sec = (a)->tv_sec - (b)->tv_sec; (c)->tv_usec = (a)->tv_usec = (b)->tv_usec;} while(0)
  69 #endif
  70
  71 static void update(int fd) {
  72         sendline(fd, "%d %d", CONTROL, REQ_DUMP_TRAFFIC);
  73         gettimeofday(&now, NULL);
  74
  75         timersub(&now, &prev, &diff);
  76         prev = now;
  77         float interval = diff.tv_sec + diff.tv_usec * 1e-6;
  78
  79         char line[4096];
  80         char name[4096];
  81         int code;
  82         int req;
  83         uint64_t in_packets;
  84         uint64_t in_bytes;
  85         uint64_t out_packets;
  86         uint64_t out_bytes;
  87
  88         for(list_node_t *i = node_list.head; i; i = i->next) {
  89                 nodestats_t *node = i->data;
  90                 node->known = false;
  91         }
  92
  93         while(recvline(fd, line, sizeof line)) {
  94                 int n = sscanf(line, "%d %d %s %"PRIu64" %"PRIu64" %"PRIu64" %"PRIu64, &code, &req, name, &in_packets, &in_bytes, &out_packets, &out_bytes);
  95
  96                 if(n == 2)
  97                         break;
  98
  99                 if(n != 7) {
 100                         endwin();
 101                         fprintf(stderr, "Error receiving traffic information\n");
 102                         exit(1);
 103                 }
 104
 105                 nodestats_t *found = NULL;
 106
 107                 for(list_node_t *i = node_list.head; i; i = i->next) {
 108                         nodestats_t *node = i->data;
 109                         int result = strcmp(name, node->name);
 110                         if(result > 0) {
 111                                 continue;
 112                         } if(result == 0) {
 113                                 found = node;
 114                                 break;
 115                         } else {
 116                                 found = xmalloc_and_zero(sizeof *found);
 117                                 found->name = xstrdup(name);
 118                                 list_insert_before(&node_list, i, found);
 119                                 changed = true;
 120                                 break;
 121                         }
 122                 }
 123
 124                 if(!found) {
 125                         found = xmalloc_and_zero(sizeof *found);
 126                         found->name = xstrdup(name);
 127                         list_insert_tail(&node_list, found);
 128                         changed = true;
 129                 }
 130
 131                 found->known = true;
 132                 found->in_packets_rate = (in_packets - found->in_packets) / interval;
 133                 found->in_bytes_rate = (in_bytes - found->in_bytes) / interval;
 134                 found->out_packets_rate = (out_packets - found->out_packets) / interval;
 135                 found->out_bytes_rate = (out_bytes - found->out_bytes) / interval;
 136                 found->in_packets = in_packets;
 137                 found->in_bytes = in_bytes;
 138                 found->out_packets = out_packets;
 139                 found->out_bytes = out_bytes;
 140         }
 141 }
 142
 143 static void redraw(void) {
 144         erase();
 145
 146         mvprintw(0, 0, "Tinc %-16s  Nodes: %4d  Sort: %-10s  %s", netname ?: "", node_list.count, sortname[sortmode], cumulative ? "Cumulative" : "Current");
 147         attrset(A_REVERSE);
 148         mvprintw(2, 0, "Node                IN pkts   IN %s   OUT pkts  OUT %s", unit, unit);
 149         chgat(-1, A_REVERSE, 0, NULL);
 150
 151         static nodestats_t **sorted = 0;
 152         static int n = 0;
 153         if(changed) {
 154                 n = 0;
 155                 sorted = xrealloc(sorted, node_list.count * sizeof *sorted);
 156                 for(list_node_t *i = node_list.head; i; i = i->next)
 157                         sorted[n++] = i->data;
 158                 changed = false;
 159         }
 160
 161         for(int i = 0; i < n; i++)
 162                 sorted[i]->i = i;
 163
 164         int cmpfloat(float a, float b) {
 165                 if(a < b)
 166                         return -1;
 167                 else if(a > b)
 168                         return 1;
 169                 else
 170                         return 0;
 171         }
 172
 173         int cmpu64(uint64_t a, uint64_t b) {
 174                 if(a < b)
 175                         return -1;
 176                 else if(a > b)
 177                         return 1;
 178                 else
 179                         return 0;
 180         }
 181
 182         int sortfunc(const void *a, const void *b) {
 183                 const nodestats_t *na = *(const nodestats_t **)a;
 184                 const nodestats_t *nb = *(const nodestats_t **)b;
 185                 switch(sortmode) {
 186                         case 1:
 187                                 if(cumulative)
 188                                         return -cmpu64(na->in_packets, nb->in_packets) ?: na->i - nb->i;
 189                                 else
 190                                         return -cmpfloat(na->in_packets_rate, nb->in_packets_rate) ?: na->i - nb->i;
 191                         case 2:
 192                                 if(cumulative)
 193                                         return -cmpu64(na->in_bytes, nb->in_bytes) ?: na->i - nb->i;
 194                                 else
 195                                         return -cmpfloat(na->in_bytes_rate, nb->in_bytes_rate) ?: na->i - nb->i;
 196                         case 3:
 197                                 if(cumulative)
 198                                         return -cmpu64(na->out_packets, nb->out_packets) ?: na->i - nb->i;
 199                                 else
 200                                         return -cmpfloat(na->out_packets_rate, nb->out_packets_rate) ?: na->i - nb->i;
 201                         case 4:
 202                                 if(cumulative)
 203                                         return -cmpu64(na->out_bytes, nb->out_bytes) ?: na->i - nb->i;
 204                                 else
 205                                         return -cmpfloat(na->out_bytes_rate, nb->out_bytes_rate) ?: na->i - nb->i;
 206                         case 5:
 207                                 if(cumulative)
 208                                         return -cmpu64(na->in_packets + na->out_packets, nb->in_packets + nb->out_packets) ?: na->i - nb->i;
 209                                 else
 210                                         return -cmpfloat(na->in_packets_rate + na->out_packets_rate, nb->in_packets_rate + nb->out_packets_rate) ?: na->i - nb->i;
 211                         case 6:
 212                                 if(cumulative)
 213                                         return -cmpu64(na->in_bytes + na->out_bytes, nb->in_bytes + nb->out_bytes) ?: na->i - nb->i;
 214                                 else
 215                                         return -cmpfloat(na->in_bytes_rate + na->out_bytes_rate, nb->in_bytes_rate + nb->out_bytes_rate) ?: na->i - nb->i;
 216                         default:
 217                                 return strcmp(na->name, nb->name) ?: na->i - nb->i;
 218                 }
 219         }
 220
 221         qsort(sorted, n, sizeof *sorted, sortfunc);
 222
 223         for(int i = 0, row = 3; i < n; i++, row++) {
 224                 nodestats_t *node = sorted[i];
 225                 if(node->known)
 226                         if(node->in_packets_rate || node->out_packets_rate)
 227                                 attrset(A_BOLD);
 228                         else
 229                                 attrset(A_NORMAL);
 230                 else
 231                         attrset(A_DIM);
 232
 233                 if(cumulative)
 234                         mvprintw(row, 0, "%-16s %10"PRIu64" %10.0f %10"PRIu64" %10.0f",
 235                                         node->name, node->in_packets, node->in_bytes * scale, node->out_packets, node->out_bytes * scale);
 236                 else
 237                         mvprintw(row, 0, "%-16s %10.0f %10.0f %10.0f %10.0f",
 238                                         node->name, node->in_packets_rate, node->in_bytes_rate * scale, node->out_packets_rate, node->out_bytes_rate * scale);
 239         }
 240
 241         attrset(A_NORMAL);
 242         move(1, 0);
 243
 244         refresh();
 245 }
 246
 247 void top(int fd) {
 248         initscr();
 249         timeout(delay);
 250
 251         while(running) {
 252                 update(fd);
 253                 redraw();
 254
 255                 switch(getch()) {
 256                         case 's': {
 257                                 timeout(-1);
 258                                 float input = delay * 1e-3;
 259                                 mvprintw(1, 0, "Change delay from %.1fs to: ", input);
 260                                 scanw("%f", &input);
 261                                 if(input < 0.1)
 262                                         input = 0.1;
 263                                 delay = input * 1e3;
 264                                 timeout(delay);
 265                                 break;
 266                         }
 267                         case 'c':
 268                                   cumulative = !cumulative;
 269                                   break;
 270                         case 'n':
 271                                   sortmode = 0;
 272                                   break;
 273                         case 'i':
 274                                   sortmode = 2;
 275                                   break;
 276                         case 'I':
 277                                   sortmode = 1;
 278                                   break;
 279                         case 'o':
 280                                   sortmode = 4;
 281                                   break;
 282                         case 'O':
 283                                   sortmode = 3;
 284                                   break;
 285                         case 't':
 286                                   sortmode = 6;
 287                                   break;
 288                         case 'T':
 289                                   sortmode = 5;
 290                                   break;
 291                         case 'b':
 292                                   unit = "bytes";
 293                                   scale = 1;
 294                                   break;
 295                         case 'k':
 296                                   unit = "kbyte";
 297                                   scale = 1e-3;
 298                                   break;
 299                         case 'M':
 300                                   unit = "Mbyte";
 301                                   scale = 1e-6;
 302                                   break;
 303                         case 'G':
 304                                   unit = "Gbyte";
 305                                   scale = 1e-9;
 306                                   break;
 307                         case 'q':
 308                         case KEY_BREAK:
 309                                 running = false;
 310                                 break;
 311                         default:
 312                                 break;
 313                 }
 314         }
 315
 316         endwin();
 317 }
 318
 319 #endif