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 #include <curses.h>
  23
  24 #include "control_common.h"
  25 #include "list.h"
  26 #include "tincctl.h"
  27 #include "top.h"
  28 #include "xalloc.h"
  29
  30 typedef struct nodestats_t {
  31         char *name;
  32         uint64_t in_packets;
  33         uint64_t in_bytes;
  34         uint64_t out_packets;
  35         uint64_t out_bytes;
  36         float in_packets_rate;
  37         float in_bytes_rate;
  38         float out_packets_rate;
  39         float out_bytes_rate;
  40         bool known;
  41 } nodestats_t;
  42
  43 static const char *const sortname[] = {
  44         "name",
  45         "in pkts",
  46         "in bytes",
  47         "out pkts",
  48         "out bytes",
  49         "tot pkts",
  50         "tot bytes",
  51 };
  52
  53 static int sortmode = 0;
  54 static bool cumulative = false;
  55
  56 static list_t node_list;
  57 static struct timeval now, prev, diff;
  58 static int delay = 1000;
  59 static bool running = true;
  60 static bool changed = true;
  61 static const char *unit = "bytes";
  62 static float scale = 1;
  63
  64 #ifndef timersub
  65 #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)
  66 #endif
  67
  68 static void update(int fd) {
  69         sendline(fd, "%d %d", CONTROL, REQ_DUMP_TRAFFIC);
  70         gettimeofday(&now, NULL);
  71
  72         timersub(&now, &prev, &diff);
  73         prev = now;
  74         float interval = diff.tv_sec + diff.tv_usec * 1e-6;
  75
  76         char line[4096];
  77         char name[4096];
  78         int code;
  79         int req;
  80         uint64_t in_packets;
  81         uint64_t in_bytes;
  82         uint64_t out_packets;
  83         uint64_t out_bytes;
  84
  85         for(list_node_t *i = node_list.head; i; i = i->next) {
  86                 nodestats_t *node = i->data;
  87                 node->known = false;
  88         }
  89
  90         while(recvline(fd, line, sizeof line)) {
  91                 int n = sscanf(line, "%d %d %s %"PRIu64" %"PRIu64" %"PRIu64" %"PRIu64, &code, &req, name, &in_packets, &in_bytes, &out_packets, &out_bytes);
  92
  93                 if(n == 2)
  94                         break;
  95
  96                 if(n != 7) {
  97                         endwin();
  98                         fprintf(stderr, "Error receiving traffic information\n");
  99                         exit(1);
 100                 }
 101
 102                 nodestats_t *found = NULL;
 103
 104                 for(list_node_t *i = node_list.head; i; i = i->next) {
 105                         nodestats_t *node = i->data;
 106                         int result = strcmp(name, node->name);
 107                         if(result > 0) {
 108                                 continue;
 109                         } if(result == 0) {
 110                                 found = node;
 111                                 break;
 112                         } else {
 113                                 found = xmalloc_and_zero(sizeof *found);
 114                                 found->name = xstrdup(name);
 115                                 list_insert_before(&node_list, i, found);
 116                                 changed = true;
 117                                 break;
 118                         }
 119                 }
 120
 121                 if(!found) {
 122                         found = xmalloc_and_zero(sizeof *found);
 123                         found->name = xstrdup(name);
 124                         list_insert_tail(&node_list, found);
 125                         changed = true;
 126                 }
 127
 128                 found->known = true;
 129                 found->in_packets_rate = (in_packets - found->in_packets) / interval;
 130                 found->in_bytes_rate = (in_bytes - found->in_bytes) / interval;
 131                 found->out_packets_rate = (out_packets - found->out_packets) / interval;
 132                 found->out_bytes_rate = (out_bytes - found->out_bytes) / interval;
 133                 found->in_packets = in_packets;
 134                 found->in_bytes = in_bytes;
 135                 found->out_packets = out_packets;
 136                 found->out_bytes = out_bytes;
 137         }
 138 }
 139
 140 static void redraw(void) {
 141         erase();
 142
 143         mvprintw(0, 0, "Tinc %-16s  Nodes: %4d  Sort: %-8s  %s", netname ?: "", node_list.count, sortname[sortmode], cumulative ? "Cumulative" : "Current");
 144         attrset(A_REVERSE);
 145         mvprintw(2, 0, "Node                IN pkts   IN %s   OUT pkts  OUT %s", unit, unit);
 146         chgat(-1, A_REVERSE, 0, NULL);
 147
 148         static nodestats_t **sorted = 0;
 149         static int n = 0;
 150         if(changed) {
 151                 n = 0;
 152                 sorted = xrealloc(sorted, node_list.count * sizeof *sorted);
 153                 for(list_node_t *i = node_list.head; i; i = i->next)
 154                         sorted[n++] = i->data;
 155                 changed = false;
 156         }
 157
 158         int cmpfloat(float a, float b) {
 159                 if(a < b)
 160                         return -1;
 161                 else if(a > b)
 162                         return 1;
 163                 else
 164                         return 0;
 165         }
 166
 167         int cmpu64(uint64_t a, uint64_t b) {
 168                 if(a < b)
 169                         return -1;
 170                 else if(a > b)
 171                         return 1;
 172                 else
 173                         return 0;
 174         }
 175
 176         int sortfunc(const void *a, const void *b) {
 177                 const nodestats_t *na = *(const nodestats_t **)a;
 178                 const nodestats_t *nb = *(const nodestats_t **)b;
 179                 switch(sortmode) {
 180                         case 1:
 181                                 if(cumulative)
 182                                         return -cmpu64(na->in_packets, nb->in_packets);
 183                                 else
 184                                         return -cmpfloat(na->in_packets_rate, nb->in_packets_rate);
 185                         case 2:
 186                                 if(cumulative)
 187                                         return -cmpu64(na->in_bytes, nb->in_bytes);
 188                                 else
 189                                         return -cmpfloat(na->in_bytes_rate, nb->in_bytes_rate);
 190                         case 3:
 191                                 if(cumulative)
 192                                         return -cmpu64(na->out_packets, nb->out_packets);
 193                                 else
 194                                         return -cmpfloat(na->out_packets_rate, nb->out_packets_rate);
 195                         case 4:
 196                                 if(cumulative)
 197                                         return -cmpu64(na->out_bytes, nb->out_bytes);
 198                                 else
 199                                         return -cmpfloat(na->out_bytes_rate, nb->out_bytes_rate);
 200                         case 5:
 201                                 if(cumulative)
 202                                         return -cmpu64(na->in_packets + na->out_packets, nb->in_packets + nb->out_packets);
 203                                 else
 204                                         return -cmpfloat(na->in_packets_rate + na->out_packets_rate, nb->in_packets_rate + nb->out_packets_rate);
 205                         case 6:
 206                                 if(cumulative)
 207                                         return -cmpu64(na->in_bytes + na->out_bytes, nb->in_bytes + nb->out_bytes);
 208                                 else
 209                                         return -cmpfloat(na->in_bytes_rate + na->out_bytes_rate, nb->in_bytes_rate + nb->out_bytes_rate);
 210                         default:
 211                                 return strcmp(na->name, nb->name);
 212                 }
 213         }
 214
 215         qsort(sorted, n, sizeof *sorted, sortfunc);
 216
 217         for(int i = 0, row = 3; i < n; i++, row++) {
 218                 nodestats_t *node = sorted[i];
 219                 if(node->known)
 220                         if(node->in_packets_rate || node->out_packets_rate)
 221                                 attrset(A_BOLD);
 222                         else
 223                                 attrset(A_NORMAL);
 224                 else
 225                         attrset(A_DIM);
 226
 227                 if(cumulative)
 228                         mvprintw(row, 0, "%-16s %10"PRIu64" %10.0f %10"PRIu64" %10.0f",
 229                                         node->name, node->in_packets, node->in_bytes * scale, node->out_packets, node->out_bytes * scale);
 230                 else
 231                         mvprintw(row, 0, "%-16s %10.0f %10.0f %10.0f %10.0f",
 232                                         node->name, node->in_packets_rate, node->in_bytes_rate * scale, node->out_packets_rate, node->out_bytes_rate * scale);
 233         }
 234
 235         attrset(A_NORMAL);
 236         move(1, 0);
 237
 238         refresh();
 239 }
 240
 241 void top(int fd) {
 242         initscr();
 243         timeout(delay);
 244
 245         while(running) {
 246                 update(fd);
 247                 redraw();
 248
 249                 switch(getch()) {
 250                         case 's': {
 251                                 timeout(-1);
 252                                 float input = delay * 1e-3;
 253                                 mvprintw(1, 0, "Change delay from %.1fs to: ", input);
 254                                 scanw("%f", &input);
 255                                 if(input < 0.1)
 256                                         input = 0.1;
 257                                 delay = input * 1e3;
 258                                 timeout(delay);
 259                                 break;
 260                         }
 261                         case 'c':
 262                                   cumulative = !cumulative;
 263                                   break;
 264                         case 'n':
 265                                   sortmode = 0;
 266                                   break;
 267                         case 'i':
 268                                   sortmode = 2;
 269                                   break;
 270                         case 'I':
 271                                   sortmode = 1;
 272                                   break;
 273                         case 'o':
 274                                   sortmode = 4;
 275                                   break;
 276                         case 'O':
 277                                   sortmode = 3;
 278                                   break;
 279                         case 't':
 280                                   sortmode = 6;
 281                                   break;
 282                         case 'T':
 283                                   sortmode = 5;
 284                                   break;
 285                         case 'b':
 286                                   unit = "bytes";
 287                                   scale = 1;
 288                                   break;
 289                         case 'k':
 290                                   unit = "kbyte";
 291                                   scale = 1e-3;
 292                                   break;
 293                         case 'M':
 294                                   unit = "Mbyte";
 295                                   scale = 1e-6;
 296                                   break;
 297                         case 'G':
 298                                   unit = "Gbyte";
 299                                   scale = 1e-9;
 300                                   break;
 301                         case 'q':
 302                         case 27:
 303                         case KEY_BREAK:
 304                                 running = false;
 305                                 break;
 306                         default:
 307                                 break;
 308                 }
 309         }
 310
 311         endwin();
 312 }