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 #undef KEY_EVENT  /* There are conflicting declarations for KEY_EVENT in Windows wincon.h and curses.h. */
  25 #include <curses.h>
  26
  27 #include "control_common.h"
  28 #include "list.h"
  29 #include "names.h"
  30 #include "tincctl.h"
  31 #include "top.h"
  32 #include "xalloc.h"
  33
  34 typedef struct nodestats_t {
  35         char *name;
  36         int i;
  37         uint64_t in_packets;
  38         uint64_t in_bytes;
  39         uint64_t out_packets;
  40         uint64_t out_bytes;
  41         float in_packets_rate;
  42         float in_bytes_rate;
  43         float out_packets_rate;
  44         float out_bytes_rate;
  45         bool known;
  46 } nodestats_t;
  47
  48 static const char *const sortname[] = {
  49         "name",
  50         "in pkts",
  51         "in bytes",
  52         "out pkts",
  53         "out bytes",
  54         "tot pkts",
  55         "tot bytes",
  56 };
  57
  58 static int sortmode = 0;
  59 static bool cumulative = false;
  60
  61 static list_t node_list;
  62 static struct timeval cur, prev, diff;
  63 static int delay = 1000;
  64 static bool changed = true;
  65 static const char *bunit = "bytes";
  66 static float bscale = 1;
  67 static const char *punit = "pkts";
  68 static float pscale = 1;
  69
  70 static bool update(int fd) {
  71         if(!sendline(fd, "%d %d", CONTROL, REQ_DUMP_TRAFFIC))
  72                 return false;
  73
  74         gettimeofday(&cur, NULL);
  75
  76         timersub(&cur, &prev, &diff);
  77         prev = cur;
  78         float interval = diff.tv_sec + diff.tv_usec * 1e-6;
  79
  80         char line[4096];
  81         char name[4096];
  82         int code;
  83         int req;
  84         uint64_t in_packets;
  85         uint64_t in_bytes;
  86         uint64_t out_packets;
  87         uint64_t out_bytes;
  88
  89         for list_each(nodestats_t, ns, &node_list)
  90                 ns->known = false;
  91
  92         while(recvline(fd, line, sizeof line)) {
  93                 int n = sscanf(line, "%d %d %4095s %"PRIu64" %"PRIu64" %"PRIu64" %"PRIu64, &code, &req, name, &in_packets, &in_bytes, &out_packets, &out_bytes);
  94
  95                 if(n == 2)
  96                         return true;
  97
  98                 if(n != 7)
  99                         return false;
 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         return false;
 138 }
 139
 140 static int cmpfloat(float a, float b) {
 141         if(a < b)
 142                 return -1;
 143         else if(a > b)
 144                 return 1;
 145         else
 146                 return 0;
 147 }
 148
 149 static int cmpu64(uint64_t a, uint64_t b) {
 150         if(a < b)
 151                 return -1;
 152         else if(a > b)
 153                 return 1;
 154         else
 155                 return 0;
 156 }
 157
 158 static int sortfunc(const void *a, const void *b) {
 159         const nodestats_t *na = *(const nodestats_t **)a;
 160         const nodestats_t *nb = *(const nodestats_t **)b;
 161         int result;
 162
 163         switch(sortmode) {
 164                 case 1:
 165                         if(cumulative)
 166                                 result = -cmpu64(na->in_packets, nb->in_packets);
 167                         else
 168                                 result = -cmpfloat(na->in_packets_rate, nb->in_packets_rate);
 169                 case 2:
 170                         if(cumulative)
 171                                 result = -cmpu64(na->in_bytes, nb->in_bytes);
 172                         else
 173                                 result = -cmpfloat(na->in_bytes_rate, nb->in_bytes_rate);
 174                 case 3:
 175                         if(cumulative)
 176                                 result = -cmpu64(na->out_packets, nb->out_packets);
 177                         else
 178                                 result = -cmpfloat(na->out_packets_rate, nb->out_packets_rate);
 179                 case 4:
 180                         if(cumulative)
 181                                 result = -cmpu64(na->out_bytes, nb->out_bytes);
 182                         else
 183                                 result = -cmpfloat(na->out_bytes_rate, nb->out_bytes_rate);
 184                 case 5:
 185                         if(cumulative)
 186                                 result = -cmpu64(na->in_packets + na->out_packets, nb->in_packets + nb->out_packets);
 187                         else
 188                                 result = -cmpfloat(na->in_packets_rate + na->out_packets_rate, nb->in_packets_rate + nb->out_packets_rate);
 189                 case 6:
 190                         if(cumulative)
 191                                 result = -cmpu64(na->in_bytes + na->out_bytes, nb->in_bytes + nb->out_bytes);
 192                         else
 193                                 result = -cmpfloat(na->in_bytes_rate + na->out_bytes_rate, nb->in_bytes_rate + nb->out_bytes_rate);
 194                 default:
 195                         result = strcmp(na->name, nb->name);
 196         }
 197
 198         if(result)
 199                 return result;
 200         else
 201                 return na->i - nb->i;
 202 }
 203
 204 static void redraw(void) {
 205         erase();
 206
 207         mvprintw(0, 0, "Tinc %-16s  Nodes: %4d  Sort: %-10s  %s", netname ?: "", node_list.count, sortname[sortmode], cumulative ? "Cumulative" : "Current");
 208         attrset(A_REVERSE);
 209         mvprintw(2, 0, "Node                IN %s   IN %s   OUT %s  OUT %s", punit, bunit, punit, bunit);
 210         chgat(-1, A_REVERSE, 0, NULL);
 211
 212         static nodestats_t **sorted = 0;
 213         static int n = 0;
 214         if(changed) {
 215                 n = 0;
 216                 sorted = xrealloc(sorted, node_list.count * sizeof *sorted);
 217                 for list_each(nodestats_t, ns, &node_list)
 218                         sorted[n++] = ns;
 219                 changed = false;
 220         }
 221
 222         for(int i = 0; i < n; i++)
 223                 sorted[i]->i = i;
 224
 225         if(sorted)
 226                 qsort(sorted, n, sizeof *sorted, sortfunc);
 227
 228         for(int i = 0, row = 3; i < n; i++, row++) {
 229                 nodestats_t *node = sorted[i];
 230                 if(node->known)
 231                         if(node->in_packets_rate || node->out_packets_rate)
 232                                 attrset(A_BOLD);
 233                         else
 234                                 attrset(A_NORMAL);
 235                 else
 236                         attrset(A_DIM);
 237
 238                 if(cumulative)
 239                         mvprintw(row, 0, "%-16s %10.0f %10.0f %10.0f %10.0f",
 240                                         node->name, node->in_packets * pscale, node->in_bytes * bscale, node->out_packets * pscale, node->out_bytes * bscale);
 241                 else
 242                         mvprintw(row, 0, "%-16s %10.0f %10.0f %10.0f %10.0f",
 243                                         node->name, node->in_packets_rate * pscale, node->in_bytes_rate * bscale, node->out_packets_rate * pscale, node->out_bytes_rate * bscale);
 244         }
 245
 246         attrset(A_NORMAL);
 247         move(1, 0);
 248
 249         refresh();
 250 }
 251
 252 void top(int fd) {
 253         initscr();
 254         timeout(delay);
 255         bool running = true;
 256
 257         while(running) {
 258                 if(!update(fd))
 259                         break;
 260
 261                 redraw();
 262
 263                 switch(getch()) {
 264                         case 's': {
 265                                 timeout(-1);
 266                                 float input = delay * 1e-3;
 267                                 mvprintw(1, 0, "Change delay from %.1fs to: ", input);
 268                                 scanw("%f", &input);
 269                                 if(input < 0.1)
 270                                         input = 0.1;
 271                                 delay = input * 1e3;
 272                                 timeout(delay);
 273                                 break;
 274                         }
 275                         case 'c':
 276                                 cumulative = !cumulative;
 277                                 break;
 278                         case 'n':
 279                                 sortmode = 0;
 280                                 break;
 281                         case 'i':
 282                                 sortmode = 2;
 283                                 break;
 284                         case 'I':
 285                                 sortmode = 1;
 286                                 break;
 287                         case 'o':
 288                                 sortmode = 4;
 289                                 break;
 290                         case 'O':
 291                                 sortmode = 3;
 292                                 break;
 293                         case 't':
 294                                 sortmode = 6;
 295                                 break;
 296                         case 'T':
 297                                 sortmode = 5;
 298                                 break;
 299                         case 'b':
 300                                 bunit = "bytes";
 301                                 bscale = 1;
 302                                 punit = "pkts";
 303                                 pscale = 1;
 304                                 break;
 305                         case 'k':
 306                                 bunit = "kbyte";
 307                                 bscale = 1e-3;
 308                                 punit = "pkts";
 309                                 pscale = 1;
 310                                 break;
 311                         case 'M':
 312                                 bunit = "Mbyte";
 313                                 bscale = 1e-6;
 314                                 punit = "kpkt";
 315                                 pscale = 1e-3;
 316                                 break;
 317                         case 'G':
 318                                 bunit = "Gbyte";
 319                                 bscale = 1e-9;
 320                                 punit = "Mpkt";
 321                                 pscale = 1e-6;
 322                                 break;
 323                         case 'q':
 324                         case KEY_BREAK:
 325                                 running = false;
 326                                 break;
 327                         default:
 328                                 break;
 329                 }
 330         }
 331
 332         endwin();
 333 }
 334
 335 #endif