src/ifpps.c

   1 /*
   2  * netsniff-ng - the packet sniffing beast
   3  * By Daniel Borkmann <daniel@netsniff-ng.org>
   4  * Copyright 2009 - 2012 Daniel Borkmann.
   5  * Subject to the GPL, version 2.
   6  *
   7  * A tiny tool to provide top-like reliable networking statistics.
   8  * Why? Well, some time ago I used iptraf to display network traffic
   9  * statistics. During that time and probably also today, they are
  10  * using libpcap to collect statistics. Well, bad idea since this
  11  * will give you false statistics on high I/O load. Therefore, ifpps
  12  * reads out the 'real' kernel statistics, so things your NIC sees
  13  * and not some userland library.
  14  *
  15  *   He had all the injured air of a liar suspected when for once he
  16  *   has told the truth, or part of it.
  17  *
  18  *     -- The Lord of the Rings, On Gollum,
  19  *        Chapter 'The Black Gate is Closed'.
  20  */
  21
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <curses.h>
  25 #include <getopt.h>
  26 #include <ctype.h>
  27 #include <sys/socket.h>
  28 #include <signal.h>
  29 #include <stdint.h>
  30 #include <stdlib.h>
  31 #include <time.h>
  32
  33 #include "die.h"
  34 #include "xmalloc.h"
  35 #include "xutils.h"
  36 #include "xio.h"
  37 #include "built_in.h"
  38
  39 struct wifi_stat {
  40         uint32_t bitrate;
  41         int16_t link_qual, link_qual_max;
  42         int signal_level, noise_level;
  43 };
  44
  45 struct ifstat {
  46         uint64_t rx_bytes, rx_packets, rx_drops, rx_errors;
  47         uint64_t rx_fifo, rx_frame, rx_multi;
  48         uint64_t tx_bytes, tx_packets, tx_drops, tx_errors;
  49         uint64_t tx_fifo, tx_colls, tx_carrier;
  50         uint64_t irqs[MAX_CPUS], irqs_srx[MAX_CPUS], irqs_stx[MAX_CPUS];
  51         int64_t cpu_user[MAX_CPUS], cpu_nice[MAX_CPUS], cpu_sys[MAX_CPUS];
  52         int64_t cpu_idle[MAX_CPUS], cpu_iow[MAX_CPUS], mem_free, mem_total;
  53         int32_t cswitch, forks, procs_run, procs_iow;
  54         uint32_t irq_nr;
  55         struct wifi_stat wifi;
  56 };
  57
  58 volatile sig_atomic_t sigint = 0;
  59
  60 static struct ifstat stats_old, stats_new, stats_delta;
  61
  62 static int stats_loop = 0;
  63
  64 static WINDOW *stats_screen = NULL;
  65
  66 static const char *short_options = "d:t:vhclp";
  67 static const struct option long_options[] = {
  68         {"dev",                 required_argument,      NULL, 'd'},
  69         {"interval",            required_argument,      NULL, 't'},
  70         {"promisc",             no_argument,            NULL, 'p'},
  71         {"csv",                 no_argument,            NULL, 'c'},
  72         {"loop",                no_argument,            NULL, 'l'},
  73         {"version",             no_argument,            NULL, 'v'},
  74         {"help",                no_argument,            NULL, 'h'},
  75         {NULL, 0, NULL, 0}
  76 };
  77
  78 static void signal_handler(int number)
  79 {
  80         switch (number) {
  81         case SIGINT:
  82                 sigint = 1;
  83                 break;
  84         case SIGHUP:
  85         default:
  86                 break;
  87         }
  88 }
  89
  90 static inline char *snr_to_str(int level)
  91 {
  92         if (level > 40)
  93                 return "very good signal";
  94         if (level > 25 && level <= 40)
  95                 return "good signal";
  96         if (level > 15 && level <= 25)
  97                 return "poor signal";
  98         if (level > 10 && level <= 15)
  99                 return "very poor signal";
 100         if (level <= 10)
 101                 return "no signal";
 102
 103         return "unknown";
 104 }
 105
 106 static inline int iswireless(const struct ifstat *stats)
 107 {
 108         return stats->wifi.bitrate > 0;
 109 }
 110
 111 static void help(void)
 112 {
 113         printf("\nifpps %s, top-like kernel networking and system statistics\n",
 114                VERSION_STRING);
 115         puts("http://www.netsniff-ng.org\n\n"
 116              "Usage: ifpps [options] || ifpps <netdev>\n"
 117              "Options:\n"
 118              "  -d|--dev <netdev>      Device to fetch statistics for e.g., eth0\n"
 119              "  -t|--interval <time>   Refresh time in ms (default 500 ms)\n"
 120              "  -p|--promisc           Promiscuous mode\n"
 121              "  -c|--csv               Output to terminal as CSV\n"
 122              "                         E.g. post-processing with Gnuplot et al.\n"
 123              "  -l|--loop              Continuous CSV output\n"
 124              "  -v|--version           Print version\n"
 125              "  -h|--help              Print this help\n\n"
 126              "Examples:\n"
 127              "  ifpps eth0\n"
 128              "  ifpps -pd eth0\n"
 129              "  ifpps -lpcd wlan0 > plot.dat\n\n"
 130              "Please report bugs to <bugs@netsniff-ng.org>\n"
 131              "Copyright (C) 2009-2012 Daniel Borkmann <daniel@netsniff-ng.org>\n"
 132              "License: GNU GPL version 2.0\n"
 133              "This is free software: you are free to change and redistribute it.\n"
 134              "There is NO WARRANTY, to the extent permitted by law.\n");
 135         die();
 136 }
 137
 138 static void version(void)
 139 {
 140         printf("\nifpps %s, top-like kernel networking and system statistics\n",
 141                VERSION_STRING);
 142         puts("http://www.netsniff-ng.org\n\n"
 143              "Please report bugs to <bugs@netsniff-ng.org>\n"
 144              "Copyright (C) 2009-2012 Daniel Borkmann <daniel@netsniff-ng.org>\n"
 145              "License: GNU GPL version 2.0\n"
 146              "This is free software: you are free to change and redistribute it.\n"
 147              "There is NO WARRANTY, to the extent permitted by law.\n");
 148         die();
 149 }
 150
 151 static int stats_proc_net_dev(const char *ifname, struct ifstat *stats)
 152 {
 153         int ret = -EINVAL;
 154         char buff[256];
 155         FILE *fp;
 156
 157         fp = fopen("/proc/net/dev", "r");
 158         if (!fp)
 159                 panic("Cannot open /proc/net/dev!\n");
 160
 161         /* Omit table header from procfs file */
 162         if (fgets(buff, sizeof(buff), fp));
 163         if (fgets(buff, sizeof(buff), fp));
 164
 165         memset(buff, 0, sizeof(buff));
 166
 167         while (fgets(buff, sizeof(buff), fp) != NULL) {
 168                 buff[sizeof(buff) -1] = 0;
 169
 170                 if (strstr(buff, ifname) == NULL)
 171                         continue;
 172
 173                 if (sscanf(buff, "%*[a-z0-9 .-]:%lu%lu%lu%lu%lu%lu"
 174                            "%lu%*u%lu%lu%lu%lu%lu%lu%lu",
 175                            &stats->rx_bytes, &stats->rx_packets,
 176                            &stats->rx_errors, &stats->rx_drops,
 177                            &stats->rx_fifo, &stats->rx_frame,
 178                            &stats->rx_multi, &stats->tx_bytes,
 179                            &stats->tx_packets, &stats->tx_errors,
 180                            &stats->tx_drops, &stats->tx_fifo,
 181                            &stats->tx_colls, &stats->tx_carrier) == 14) {
 182                         ret = 0;
 183                         break;
 184                 }
 185
 186                 memset(buff, 0, sizeof(buff));
 187         }
 188
 189         fclose(fp);
 190         return ret;
 191 }
 192
 193 static int stats_proc_interrupts(char *ifname, struct ifstat *stats)
 194 {
 195         int ret = -EINVAL, i, cpus, try = 0;
 196         char *ptr, buff[256];
 197         struct ethtool_drvinfo drvinf;
 198         FILE *fp;
 199
 200         fp = fopen("/proc/interrupts", "r");
 201         if (!fp)
 202                 panic("Cannot open /proc/interrupts!\n");
 203
 204         cpus = get_number_cpus();
 205         bug_on(cpus > MAX_CPUS);
 206 retry:
 207         fseek(fp, 0, SEEK_SET);
 208         memset(buff, 0, sizeof(buff));
 209
 210         while (fgets(buff, sizeof(buff), fp) != NULL) {
 211                 buff[sizeof(buff) - 1] = 0;
 212                 ptr = buff;
 213
 214                 if (strstr(buff, ifname) == NULL)
 215                         continue;
 216
 217                 stats->irq_nr = strtol(ptr, &ptr, 10);
 218                 bug_on(stats->irq_nr == 0);
 219
 220                 if (ptr)
 221                         ptr++; /* Skip ':' char */
 222                 for (i = 0; i < cpus && ptr; ++i) {
 223                         stats->irqs[i] = strtol(ptr, &ptr, 10);
 224                         if (i == cpus - 1) {
 225                                 ret = 0;
 226                                 goto done;
 227                         }
 228                 }
 229
 230                 memset(buff, 0, sizeof(buff));
 231         }
 232
 233         /* We could get caught here in case of wireless devices which
 234          * are not necessarily listed under 'wlan0' et al. in
 235          * proc/interrupts. Therefore, we try once again with the
 236          * ethtool driver name.
 237          */
 238         if (ret == -EINVAL && try == 0) {
 239                 memset(&drvinf, 0, sizeof(drvinf));
 240                 if (ethtool_drvinf(ifname, &drvinf) < 0)
 241                         goto done;
 242
 243                 ifname = drvinf.driver;
 244                 try++;
 245
 246                 goto retry;
 247         }
 248 done:
 249         fclose(fp);
 250         return ret;
 251 }
 252
 253 static int stats_proc_softirqs(struct ifstat *stats)
 254 {
 255         int i, cpus;
 256         char *ptr, buff[256];
 257         FILE *fp;
 258         enum {
 259                 softirqs_net_rx,
 260                 softirqs_net_tx,
 261                 softirqs_net_none,
 262         } net_type = softirqs_net_none;
 263
 264         fp = fopen("/proc/softirqs", "r");
 265         if (!fp)
 266                 panic("Cannot open /proc/softirqs!\n");
 267
 268         cpus = get_number_cpus();
 269         bug_on(cpus > MAX_CPUS);
 270
 271         memset(buff, 0, sizeof(buff));
 272
 273         while (fgets(buff, sizeof(buff), fp) != NULL) {
 274                 buff[sizeof(buff) - 1] = 0;
 275
 276                 if ((ptr = strstr(buff, "NET_TX:")))
 277                         net_type = softirqs_net_tx;
 278                 else if ((ptr = strstr(buff, "NET_RX:")))
 279                         net_type = softirqs_net_rx;
 280                 else
 281                         continue;
 282
 283                 for (ptr += strlen("NET_xX:"), i = 0; i < cpus; ++i) {
 284                         switch (net_type) {
 285                         case softirqs_net_tx:
 286                                 stats->irqs_stx[i] = strtol(ptr, &ptr, 10);
 287                                 break;
 288                         case softirqs_net_rx:
 289                                 stats->irqs_srx[i] = strtol(ptr, &ptr, 10);
 290                                 break;
 291                         default:
 292                                 bug();
 293                         }
 294                 }
 295
 296                 memset(buff, 0, sizeof(buff));
 297         }
 298
 299         fclose(fp);
 300         return 0;
 301 }
 302
 303 static int stats_proc_memory(struct ifstat *stats)
 304 {
 305         char *ptr, buff[256];
 306         FILE *fp;
 307
 308         fp = fopen("/proc/meminfo", "r");
 309         if (!fp)
 310                 panic("Cannot open /proc/meminfo!\n");
 311
 312         memset(buff, 0, sizeof(buff));
 313
 314         while (fgets(buff, sizeof(buff), fp) != NULL) {
 315                 buff[sizeof(buff) - 1] = 0;
 316
 317                 if ((ptr = strstr(buff, "MemTotal:"))) {
 318                         ptr += strlen("MemTotal:");
 319                         stats->mem_total = strtol(ptr, &ptr, 10);
 320                 } else if ((ptr = strstr(buff, "MemFree:"))) {
 321                         ptr += strlen("MemFree:");
 322                         stats->mem_free = strtol(ptr, &ptr, 10);
 323                 }
 324
 325                 memset(buff, 0, sizeof(buff));
 326         }
 327
 328         fclose(fp);
 329         return 0;
 330 }
 331
 332 static int stats_proc_system(struct ifstat *stats)
 333 {
 334         int cpu, cpus;
 335         char *ptr, buff[256];
 336         FILE *fp;
 337
 338         fp = fopen("/proc/stat", "r");
 339         if (!fp)
 340                 panic("Cannot open /proc/stat!\n");
 341
 342         cpus = get_number_cpus();
 343         bug_on(cpus > MAX_CPUS);
 344
 345         memset(buff, 0, sizeof(buff));
 346
 347         while (fgets(buff, sizeof(buff), fp) != NULL) {
 348                 buff[sizeof(buff) - 1] = 0;
 349
 350                 if ((ptr = strstr(buff, "cpu"))) {
 351                         ptr += strlen("cpu");
 352                         if (isblank(*ptr))
 353                                 goto next;
 354
 355                         cpu = strtol(ptr, &ptr, 10);
 356                         bug_on(cpu > cpus);
 357
 358                         if (sscanf(ptr, "%lu%lu%lu%lu%lu",
 359                                    &stats->cpu_user[cpu],
 360                                    &stats->cpu_nice[cpu],
 361                                    &stats->cpu_sys[cpu],
 362                                    &stats->cpu_idle[cpu],
 363                                    &stats->cpu_iow[cpu]) != 5)
 364                                 goto next;
 365                 } else if ((ptr = strstr(buff, "ctxt"))) {
 366                         ptr += strlen("ctxt");
 367                         stats->cswitch = strtol(ptr, &ptr, 10);
 368                 } else if ((ptr = strstr(buff, "processes"))) {
 369                         ptr += strlen("processes");
 370                         stats->forks = strtol(ptr, &ptr, 10);
 371                 } else if ((ptr = strstr(buff, "procs_running"))) {
 372                         ptr += strlen("procs_running");
 373                         stats->procs_run = strtol(ptr, &ptr, 10);
 374                 } else if ((ptr = strstr(buff, "procs_blocked"))) {
 375                         ptr += strlen("procs_blocked");
 376                         stats->procs_iow = strtol(ptr, &ptr, 10);
 377                 }
 378 next:
 379                 memset(buff, 0, sizeof(buff));
 380         }
 381
 382         fclose(fp);
 383         return 0;
 384 }
 385
 386 static int stats_wireless(const char *ifname, struct ifstat *stats)
 387 {
 388         int ret;
 389         struct iw_statistics ws;
 390
 391         ret = wireless_sigqual(ifname, &ws);
 392         if (ret != 0) {
 393                 stats->wifi.bitrate = 0;
 394                 return -EINVAL;
 395         }
 396
 397         stats->wifi.bitrate = wireless_bitrate(ifname);
 398
 399         stats->wifi.signal_level =
 400                 adjust_dbm_level(ws.qual.updated & IW_QUAL_DBM, ws.qual.level);
 401         stats->wifi.noise_level =
 402                 adjust_dbm_level(ws.qual.updated & IW_QUAL_DBM, ws.qual.noise);
 403
 404         stats->wifi.link_qual = ws.qual.qual;
 405         stats->wifi.link_qual_max = wireless_rangemax_sigqual(ifname);
 406
 407         return ret;
 408 }
 409
 410 #define DIFF1(member)   do { diff->member = new->member - old->member; } while (0)
 411 #define DIFF(member)    do { \
 412                 if (sizeof(diff->member) != sizeof(new->member) || \
 413                     sizeof(diff->member) != sizeof(old->member)) \
 414                         bug(); \
 415                 bug_on((new->member - old->member) > (new->member)); \
 416                 DIFF1(member); \
 417         } while (0)
 418
 419 static void stats_diff(struct ifstat *old, struct ifstat *new,
 420                        struct ifstat *diff)
 421 {
 422         int cpus, i;
 423
 424         DIFF(rx_bytes);
 425         DIFF(rx_packets);
 426         DIFF(rx_drops);
 427         DIFF(rx_errors);
 428         DIFF(rx_fifo);
 429         DIFF(rx_frame);
 430         DIFF(rx_multi);
 431
 432         DIFF(tx_bytes);
 433         DIFF(tx_bytes);
 434         DIFF(tx_packets);
 435         DIFF(tx_drops);
 436         DIFF(tx_errors);
 437         DIFF(tx_fifo);
 438         DIFF(tx_colls);
 439         DIFF(tx_carrier);
 440
 441         DIFF1(procs_run);
 442         DIFF1(procs_iow);
 443
 444         DIFF1(wifi.signal_level);
 445         DIFF1(wifi.noise_level);
 446
 447         DIFF1(wifi.link_qual);
 448
 449         DIFF1(cswitch);
 450         DIFF1(forks);
 451
 452         cpus = get_number_cpus();
 453         bug_on(cpus > MAX_CPUS);
 454
 455         for (i = 0; i < cpus; ++i) {
 456                 DIFF(irqs[i]);
 457                 DIFF(irqs_srx[i]);
 458                 DIFF(irqs_stx[i]);
 459
 460                 DIFF1(cpu_user[i]);
 461                 DIFF1(cpu_nice[i]);
 462                 DIFF1(cpu_sys[i]);
 463                 DIFF1(cpu_idle[i]);
 464                 DIFF1(cpu_iow[i]);
 465         }
 466 }
 467
 468 static void stats_fetch(const char *ifname, struct ifstat *stats)
 469 {
 470         if (stats_proc_net_dev(ifname, stats) < 0)
 471                 panic("Cannot fetch device stats!\n");
 472         if (stats_proc_softirqs(stats) < 0)
 473                 panic("Cannot fetch software interrupts!\n");
 474         if (stats_proc_memory(stats) < 0)
 475                 panic("Cannot fetch memory stats!\n");
 476         if (stats_proc_system(stats) < 0)
 477                 panic("Cannot fetch system stats!\n");
 478
 479         stats_proc_interrupts((char *) ifname, stats);
 480
 481         stats_wireless(ifname, stats);
 482 }
 483
 484 static void stats_sample_generic(const char *ifname, uint64_t ms_interval)
 485 {
 486         memset(&stats_old, 0, sizeof(stats_old));
 487         memset(&stats_new, 0, sizeof(stats_new));
 488         memset(&stats_delta, 0, sizeof(stats_delta));
 489
 490         stats_fetch(ifname, &stats_old);
 491         usleep(ms_interval * 1000);
 492         stats_fetch(ifname, &stats_new);
 493
 494         stats_diff(&stats_old, &stats_new, &stats_delta);
 495 }
 496
 497 static void screen_init(WINDOW **screen)
 498 {
 499         (*screen) = initscr();
 500         noecho();
 501         cbreak();
 502         nodelay((*screen), TRUE);
 503         refresh();
 504         wrefresh((*screen));
 505 }
 506
 507 static void screen_header(WINDOW *screen, const char *ifname, int *voff,
 508                           uint64_t ms_interval)
 509 {
 510         char buff[64];
 511         struct ethtool_drvinfo drvinf;
 512         const char *rate = ethtool_bitrate_str(ethtool_bitrate(ifname));
 513
 514         memset(&drvinf, 0, sizeof(drvinf));
 515         ethtool_drvinf(ifname, &drvinf);
 516
 517         memset(buff, 0, sizeof(buff));
 518         if (rate)
 519                 slprintf(buff, sizeof(buff), ", %s", rate);
 520
 521         mvwprintw(screen, (*voff)++, 2,
 522                   "Kernel net/sys statistics for %s (%s%s), t=%lums",
 523                   ifname, drvinf.driver, buff, ms_interval);
 524 }
 525
 526 static void screen_net_dev_rel(WINDOW *screen, const struct ifstat *rel,
 527                                int *voff)
 528 {
 529         attron(A_REVERSE);
 530
 531         mvwprintw(screen, (*voff)++, 0,
 532                   "  RX: %16.3lf MiB/t "
 533                         "%10lu pkts/t "
 534                         "%10lu drops/t "
 535                         "%10lu errors/t  ",
 536                   1.0 * rel->rx_bytes / (1 << 20),
 537                   rel->rx_packets, rel->rx_drops, rel->rx_errors);
 538
 539         mvwprintw(screen, (*voff)++, 0,
 540                   "  TX: %16.3lf MiB/t "
 541                         "%10lu pkts/t "
 542                         "%10lu drops/t "
 543                         "%10lu errors/t  ",
 544                   1.0 * rel->tx_bytes / (1 << 20),
 545                   rel->tx_packets, rel->tx_drops, rel->tx_errors);
 546
 547         attroff(A_REVERSE);
 548 }
 549
 550 static void screen_net_dev_abs(WINDOW *screen, const struct ifstat *abs,
 551                                int *voff)
 552 {
 553         mvwprintw(screen, (*voff)++, 2,
 554                   "RX: %16.3lf MiB   "
 555                       "%10lu pkts   "
 556                       "%10lu drops   "
 557                       "%10lu errors",
 558                   1.0 * abs->rx_bytes / (1 << 20),
 559                   abs->rx_packets, abs->rx_drops, abs->rx_errors);
 560
 561         mvwprintw(screen, (*voff)++, 2,
 562                   "TX: %16.3lf MiB   "
 563                       "%10lu pkts   "
 564                       "%10lu drops   "
 565                       "%10lu errors",
 566                   1.0 * abs->tx_bytes / (1 << 20),
 567                   abs->tx_packets, abs->tx_drops, abs->tx_errors);
 568 }
 569
 570 static void screen_sys_mem(WINDOW *screen, const struct ifstat *rel,
 571                            const struct ifstat *abs, int *voff)
 572 {
 573         mvwprintw(screen, (*voff)++, 2,
 574                   "SYS:  %14ld cs/t "
 575                         "%10.1lf%% mem "
 576                         "%13ld running "
 577                         "%10ld iowait",
 578                   rel->cswitch,
 579                   100.0 * (abs->mem_total - abs->mem_free) / abs->mem_total,
 580                   abs->procs_run, abs->procs_iow);
 581 }
 582
 583 static void screen_percpu_states(WINDOW *screen, const struct ifstat *rel,
 584                                  int cpus, int *voff)
 585 {
 586         int i;
 587         uint64_t all;
 588
 589         for (i = 0; i < cpus; ++i) {
 590                 all = rel->cpu_user[i] + rel->cpu_nice[i] + rel->cpu_sys[i] +
 591                       rel->cpu_idle[i] + rel->cpu_iow[i];
 592
 593                 mvwprintw(screen, (*voff)++, 2,
 594                           "CPU%d: %13.1lf%% usr/t "
 595                                  "%9.1lf%% sys/t "
 596                                  "%10.1lf%% idl/t "
 597                                  "%11.1lf%% iow/t  ", i,
 598                           100.0 * (rel->cpu_user[i] + rel->cpu_nice[i]) / all,
 599                           100.0 * rel->cpu_sys[i] / all,
 600                           100.0 * rel->cpu_idle[i] / all,
 601                           100.0 * rel->cpu_iow[i] / all);
 602         }
 603 }
 604
 605 static void screen_percpu_irqs_rel(WINDOW *screen, const struct ifstat *rel,
 606                                    int cpus, int *voff)
 607 {
 608         int i;
 609
 610         for (i = 0; i < cpus; ++i) {
 611                 mvwprintw(screen, (*voff)++, 2,
 612                           "CPU%d: %14ld irqs/t   "
 613                                  "%15ld soirq RX/t   "
 614                                  "%15ld soirq TX/t      ", i,
 615                           rel->irqs[i],
 616                           rel->irqs_srx[i],
 617                           rel->irqs_stx[i]);
 618         }
 619 }
 620
 621 static void screen_percpu_irqs_abs(WINDOW *screen, const struct ifstat *abs,
 622                                    int cpus, int *voff)
 623 {
 624         int i;
 625
 626         for (i = 0; i < cpus; ++i) {
 627                 mvwprintw(screen, (*voff)++, 2,
 628                           "CPU%d: %14ld irqs", i,
 629                           abs->irqs[i]);
 630         }
 631 }
 632
 633 static void screen_wireless(WINDOW *screen, const struct ifstat *rel,
 634                             const struct ifstat *abs, int *voff)
 635 {
 636         if (iswireless(abs)) {
 637                 mvwprintw(screen, (*voff)++, 2,
 638                           "LinkQual: %7d/%d (%d/t)          ",
 639                           abs->wifi.link_qual,
 640                           abs->wifi.link_qual_max,
 641                           rel->wifi.link_qual);
 642
 643                 mvwprintw(screen, (*voff)++, 2,
 644                           "Signal: %8d dBm (%d dBm/t)       ",
 645                           abs->wifi.signal_level,
 646                           rel->wifi.signal_level);
 647
 648                 mvwprintw(screen, (*voff)++, 2,
 649                           "Noise:  %8d dBm (%d dBm/t)       ",
 650                           abs->wifi.noise_level,
 651                           rel->wifi.noise_level);
 652
 653                 mvwprintw(screen, (*voff)++, 2,
 654                           "SNR:    %8d dBm (%s)             ",
 655                           abs->wifi.signal_level - abs->wifi.noise_level,
 656                           snr_to_str(abs->wifi.signal_level - abs->wifi.noise_level));
 657         }
 658 }
 659
 660 static void screen_update(WINDOW *screen, const char *ifname, const struct ifstat *rel,
 661                           const struct ifstat *abs, int *first, uint64_t ms_interval)
 662 {
 663         int cpus, voff = 1, cvoff = 2;
 664
 665         curs_set(0);
 666
 667         cpus = get_number_cpus();
 668         bug_on(cpus > MAX_CPUS);
 669
 670         screen_header(screen, ifname, &voff, ms_interval);
 671
 672         voff++;
 673         screen_net_dev_rel(screen, rel, &voff);
 674
 675         voff++;
 676         screen_net_dev_abs(screen, abs, &voff);
 677
 678         voff++;
 679         screen_sys_mem(screen, rel, abs, &voff);
 680
 681         voff++;
 682         screen_percpu_states(screen, rel, cpus, &voff);
 683
 684         voff++;
 685         screen_percpu_irqs_rel(screen, rel, cpus, &voff);
 686
 687         voff++;
 688         screen_percpu_irqs_abs(screen, abs, cpus, &voff);
 689
 690         voff++;
 691         screen_wireless(screen, rel, abs, &voff);
 692
 693         if (*first) {
 694                 mvwprintw(screen, cvoff, 2, "Collecting data ...");
 695                 *first = 0;
 696         } else {
 697                 mvwprintw(screen, cvoff, 2, "                   ");
 698         }
 699
 700         wrefresh(screen);
 701         refresh();
 702 }
 703
 704 static void screen_end(void)
 705 {
 706         endwin();
 707 }
 708
 709 static int screen_main(const char *ifname, uint64_t ms_interval)
 710 {
 711         int first = 1, key;
 712
 713         screen_init(&stats_screen);
 714
 715         while (!sigint) {
 716                 key = getch();
 717                 if (key == 'q' || key == 0x1b /* esq */)
 718                         break;
 719
 720                 screen_update(stats_screen, ifname, &stats_delta, &stats_new,
 721                               &first, ms_interval);
 722
 723                 stats_sample_generic(ifname, ms_interval);
 724         }
 725
 726         screen_end();
 727
 728         return 0;
 729 }
 730
 731 static void term_csv(const char *ifname, const struct ifstat *rel,
 732                      const struct ifstat *abs, uint64_t ms_interval)
 733 {
 734         int cpus, i;
 735
 736         printf("%ld ", time(0));
 737
 738         printf("%lu ", rel->rx_bytes);
 739         printf("%lu ", rel->rx_packets);
 740         printf("%lu ", rel->rx_drops);
 741         printf("%lu ", rel->rx_errors);
 742
 743         printf("%lu ", abs->rx_bytes);
 744         printf("%lu ", abs->rx_packets);
 745         printf("%lu ", abs->rx_drops);
 746         printf("%lu ", abs->rx_errors);
 747
 748         printf("%lu ", rel->tx_bytes);
 749         printf("%lu ", rel->tx_packets);
 750         printf("%lu ", rel->tx_drops);
 751         printf("%lu ", rel->tx_errors);
 752
 753         printf("%lu ", abs->tx_bytes);
 754         printf("%lu ", abs->tx_packets);
 755         printf("%lu ", abs->tx_drops);
 756         printf("%lu ", abs->tx_errors);
 757
 758         printf("%u ",  rel->cswitch);
 759         printf("%lu ", abs->mem_free);
 760         printf("%lu ", abs->mem_total - abs->mem_free);
 761         printf("%lu ", abs->mem_total);
 762         printf("%u ",  abs->procs_run);
 763         printf("%u ",  abs->procs_iow);
 764
 765         cpus = get_number_cpus();
 766         bug_on(cpus > MAX_CPUS);
 767
 768         for (i = 0; i < cpus; ++i) {
 769                 printf("%lu ", rel->cpu_user[i]);
 770                 printf("%lu ", rel->cpu_nice[i]);
 771                 printf("%lu ", rel->cpu_sys[i]);
 772                 printf("%lu ", rel->cpu_idle[i]);
 773                 printf("%lu ", rel->cpu_iow[i]);
 774
 775                 printf("%lu ", rel->irqs[i]);
 776                 printf("%lu ", abs->irqs[i]);
 777
 778                 printf("%lu ", rel->irqs_srx[i]);
 779                 printf("%lu ", abs->irqs_srx[i]);
 780
 781                 printf("%lu ", rel->irqs_stx[i]);
 782                 printf("%lu ", abs->irqs_stx[i]);
 783         }
 784
 785         if (iswireless(abs)) {
 786                 printf("%u ", rel->wifi.link_qual);
 787                 printf("%u ", abs->wifi.link_qual);
 788                 printf("%u ", abs->wifi.link_qual_max);
 789
 790                 printf("%d ", rel->wifi.signal_level);
 791                 printf("%d ", abs->wifi.signal_level);
 792
 793                 printf("%d ", rel->wifi.noise_level);
 794                 printf("%d ", abs->wifi.noise_level);
 795         }
 796
 797         puts("");
 798         fflush(stdout);
 799 }
 800
 801 static void term_csv_header(const char *ifname, const struct ifstat *abs,
 802                             uint64_t ms_interval)
 803 {
 804         int cpus, i, j = 1;
 805
 806         printf("# gnuplot dump (#col:description)\n");
 807         printf("# networking interface: %s\n", ifname);
 808         printf("# sampling interval (t): %lu ms\n", ms_interval);
 809         printf("# %d:unixtime ", j++);
 810
 811         printf("%d:rx-bytes-per-t ", j++);
 812         printf("%d:rx-pkts-per-t ", j++);
 813         printf("%d:rx-drops-per-t ", j++);
 814         printf("%d:rx-errors-per-t ", j++);
 815
 816         printf("%d:rx-bytes ", j++);
 817         printf("%d:rx-pkts ", j++);
 818         printf("%d:rx-drops ", j++);
 819         printf("%d:rx-errors ", j++);
 820
 821         printf("%d:tx-bytes-per-t ", j++);
 822         printf("%d:tx-pkts-per-t ", j++);
 823         printf("%d:tx-drops-per-t ", j++);
 824         printf("%d:tx-errors-per-t ", j++);
 825
 826         printf("%d:tx-bytes ", j++);
 827         printf("%d:tx-pkts ", j++);
 828         printf("%d:tx-drops ", j++);
 829         printf("%d:tx-errors ", j++);
 830
 831         printf("%d:context-switches-per-t ", j++);
 832         printf("%d:mem-free ", j++);
 833         printf("%d:mem-used ", j++);
 834         printf("%d:mem-total ", j++);
 835         printf("%d:procs-in-run ", j++);
 836         printf("%d:procs-in-iow ", j++);
 837
 838         cpus = get_number_cpus();
 839         bug_on(cpus > MAX_CPUS);
 840
 841         for (i = 0, j = 22; i < cpus; ++i) {
 842                 printf("%d:cpu%i-usr-per-t ", j++, i);
 843                 printf("%d:cpu%i-nice-per-t ", j++, i);
 844                 printf("%d:cpu%i-sys-per-t ", j++, i);
 845                 printf("%d:cpu%i-idle-per-t ", j++, i);
 846                 printf("%d:cpu%i-iow-per-t ", j++, i);
 847
 848                 printf("%d:cpu%i-net-irqs-per-t ", j++, i);
 849                 printf("%d:cpu%i-net-irqs ", j++, i);
 850
 851                 printf("%d:cpu%i-net-rx-soft-irqs-per-t ", j++, i);
 852                 printf("%d:cpu%i-net-rx-soft-irqs ", j++, i);
 853                 printf("%d:cpu%i-net-tx-soft-irqs-per-t ", j++, i);
 854                 printf("%d:cpu%i-net-tx-soft-irqs ", j++, i);
 855         }
 856
 857         if (iswireless(abs)) {
 858                 printf("%d:wifi-link-qual-per-t ", j++);
 859                 printf("%d:wifi-link-qual ", j++);
 860                 printf("%d:wifi-link-qual-max ", j++);
 861
 862                 printf("%d:wifi-signal-dbm-per-t ", j++);
 863                 printf("%d:wifi-signal-dbm ", j++);
 864
 865                 printf("%d:wifi-noise-dbm-per-t ", j++);
 866                 printf("%d:wifi-noise-dbm ", j++);
 867         }
 868
 869         puts("");
 870         printf("# data:\n");
 871         fflush(stdout);
 872 }
 873
 874 static int term_main(const char *ifname, uint64_t ms_interval)
 875 {
 876         int first = 1;
 877
 878         do {
 879                 stats_sample_generic(ifname, ms_interval);
 880
 881                 if (first) {
 882                         first = 0;
 883                         term_csv_header(ifname, &stats_new, ms_interval);
 884                 }
 885
 886                 term_csv(ifname, &stats_delta, &stats_new, ms_interval);
 887         } while (stats_loop && !sigint);
 888
 889         return 0;
 890 }
 891
 892 int main(int argc, char **argv)
 893 {
 894         short ifflags = 0;
 895         int c, opt_index, ret, promisc = 0;
 896         uint64_t interval = 1000;
 897         char *ifname = NULL;
 898         int (*func_main)(const char *ifname, uint64_t ms_interval) = screen_main;
 899
 900         while ((c = getopt_long(argc, argv, short_options, long_options,
 901                &opt_index)) != EOF) {
 902                 switch (c) {
 903                 case 'h':
 904                         help();
 905                         break;
 906                 case 'v':
 907                         version();
 908                         break;
 909                 case 'd':
 910                         ifname = xstrndup(optarg, IFNAMSIZ);
 911                         break;
 912                 case 't':
 913                         interval = strtol(optarg, NULL, 10);
 914                         break;
 915                 case 'l':
 916                         stats_loop = 1;
 917                         break;
 918                 case 'p':
 919                         promisc = 1;
 920                         break;
 921                 case 'c':
 922                         func_main = term_main;
 923                         break;
 924                 case '?':
 925                         switch (optopt) {
 926                         case 'd':
 927                         case 't':
 928                                 panic("Option -%c requires an argument!\n",
 929                                       optopt);
 930                         default:
 931                                 if (isprint(optopt))
 932                                         whine("Unknown option character "
 933                                               "`0x%X\'!\n", optopt);
 934                                 die();
 935                         }
 936                 default:
 937                         break;
 938                 }
 939         }
 940
 941         if (argc == 1)
 942                 help();
 943
 944         if (argc == 2)
 945                 ifname = xstrndup(argv[1], IFNAMSIZ);
 946         if (ifname == NULL)
 947                 panic("No networking device given!\n");
 948
 949         if (!strncmp("lo", ifname, IFNAMSIZ))
 950                 panic("lo is not supported!\n");
 951         if (device_mtu(ifname) == 0)
 952                 panic("This is no networking device!\n");
 953
 954         register_signal(SIGINT, signal_handler);
 955         register_signal(SIGHUP, signal_handler);
 956
 957         if (promisc)
 958                 ifflags = enter_promiscuous_mode(ifname);
 959         ret = func_main(ifname, interval);
 960         if (promisc)
 961                 leave_promiscuous_mode(ifname, ifflags);
 962
 963         xfree(ifname);
 964         return ret;
 965 }