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 <sys/fsuid.h>
  29 #include <signal.h>
  30 #include <stdint.h>
  31 #include <stdlib.h>
  32 #include <time.h>
  33
  34 #include "die.h"
  35 #include "xmalloc.h"
  36 #include "xutils.h"
  37 #include "xio.h"
  38 #include "built_in.h"
  39
  40 struct wifi_stat {
  41         uint32_t bitrate;
  42         int16_t link_qual, link_qual_max;
  43         int signal_level /*, noise_level*/;
  44 };
  45
  46 struct ifstat {
  47         long long unsigned int rx_bytes, rx_packets, rx_drops, rx_errors;
  48         long long unsigned int rx_fifo, rx_frame, rx_multi;
  49         long long unsigned int tx_bytes, tx_packets, tx_drops, tx_errors;
  50         long long unsigned int tx_fifo, tx_colls, tx_carrier;
  51         long long unsigned int irqs[MAX_CPUS], irqs_srx[MAX_CPUS], irqs_stx[MAX_CPUS];
  52         int64_t cpu_user[MAX_CPUS], cpu_nice[MAX_CPUS], cpu_sys[MAX_CPUS];
  53         int64_t cpu_idle[MAX_CPUS], cpu_iow[MAX_CPUS], mem_free, mem_total;
  54         uint32_t irq_nr, procs_run, procs_iow, cswitch, forks;
  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 1000 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         if (fgets(buff, sizeof(buff), fp)) { ; }
 162         if (fgets(buff, sizeof(buff), fp)) { ; }
 163
 164         memset(buff, 0, sizeof(buff));
 165
 166         while (fgets(buff, sizeof(buff), fp) != NULL) {
 167                 buff[sizeof(buff) -1] = 0;
 168
 169                 if (strstr(buff, ifname) == NULL)
 170                         continue;
 171
 172                 if (sscanf(buff, "%*[a-z0-9 .-]:%llu%llu%llu%llu%llu%llu"
 173                            "%llu%*u%llu%llu%llu%llu%llu%llu%llu",
 174                            &stats->rx_bytes, &stats->rx_packets,
 175                            &stats->rx_errors, &stats->rx_drops,
 176                            &stats->rx_fifo, &stats->rx_frame,
 177                            &stats->rx_multi, &stats->tx_bytes,
 178                            &stats->tx_packets, &stats->tx_errors,
 179                            &stats->tx_drops, &stats->tx_fifo,
 180                            &stats->tx_colls, &stats->tx_carrier) == 14) {
 181                         ret = 0;
 182                         break;
 183                 }
 184
 185                 memset(buff, 0, sizeof(buff));
 186         }
 187
 188         fclose(fp);
 189         return ret;
 190 }
 191
 192 static int stats_proc_interrupts(char *ifname, struct ifstat *stats)
 193 {
 194         int ret = -EINVAL, i, cpus, try = 0;
 195         char *ptr, buff[256];
 196         struct ethtool_drvinfo drvinf;
 197         FILE *fp;
 198
 199         fp = fopen("/proc/interrupts", "r");
 200         if (!fp)
 201                 panic("Cannot open /proc/interrupts!\n");
 202
 203         cpus = get_number_cpus();
 204         bug_on(cpus > MAX_CPUS);
 205 retry:
 206         fseek(fp, 0, SEEK_SET);
 207         memset(buff, 0, sizeof(buff));
 208
 209         while (fgets(buff, sizeof(buff), fp) != NULL) {
 210                 buff[sizeof(buff) - 1] = 0;
 211                 ptr = buff;
 212
 213                 if (strstr(buff, ifname) == NULL)
 214                         continue;
 215
 216                 stats->irq_nr = strtol(ptr, &ptr, 10);
 217                 bug_on(stats->irq_nr == 0);
 218
 219                 if (ptr)
 220                         ptr++;
 221                 for (i = 0; i < cpus && ptr; ++i) {
 222                         stats->irqs[i] = strtol(ptr, &ptr, 10);
 223                         if (i == cpus - 1) {
 224                                 ret = 0;
 225                                 goto done;
 226                         }
 227                 }
 228
 229                 memset(buff, 0, sizeof(buff));
 230         }
 231
 232         if (ret == -EINVAL && try == 0) {
 233                 memset(&drvinf, 0, sizeof(drvinf));
 234                 if (ethtool_drvinf(ifname, &drvinf) < 0)
 235                         goto done;
 236
 237                 ifname = drvinf.driver;
 238                 try++;
 239
 240                 goto retry;
 241         }
 242 done:
 243         fclose(fp);
 244         return ret;
 245 }
 246
 247 static int stats_proc_softirqs(struct ifstat *stats)
 248 {
 249         int i, cpus;
 250         char *ptr, buff[256];
 251         FILE *fp;
 252         enum {
 253                 softirqs_net_rx,
 254                 softirqs_net_tx,
 255                 softirqs_net_none,
 256         } net_type = softirqs_net_none;
 257
 258         fp = fopen("/proc/softirqs", "r");
 259         if (!fp)
 260                 panic("Cannot open /proc/softirqs!\n");
 261
 262         cpus = get_number_cpus();
 263         bug_on(cpus > MAX_CPUS);
 264
 265         memset(buff, 0, sizeof(buff));
 266
 267         while (fgets(buff, sizeof(buff), fp) != NULL) {
 268                 buff[sizeof(buff) - 1] = 0;
 269
 270                 if ((ptr = strstr(buff, "NET_TX:")))
 271                         net_type = softirqs_net_tx;
 272                 else if ((ptr = strstr(buff, "NET_RX:")))
 273                         net_type = softirqs_net_rx;
 274                 else
 275                         continue;
 276
 277                 for (ptr += strlen("NET_xX:"), i = 0; i < cpus; ++i) {
 278                         switch (net_type) {
 279                         case softirqs_net_tx:
 280                                 stats->irqs_stx[i] = strtol(ptr, &ptr, 10);
 281                                 break;
 282                         case softirqs_net_rx:
 283                                 stats->irqs_srx[i] = strtol(ptr, &ptr, 10);
 284                                 break;
 285                         default:
 286                                 bug();
 287                         }
 288                 }
 289
 290                 memset(buff, 0, sizeof(buff));
 291         }
 292
 293         fclose(fp);
 294         return 0;
 295 }
 296
 297 static int stats_proc_memory(struct ifstat *stats)
 298 {
 299         char *ptr, buff[256];
 300         FILE *fp;
 301
 302         fp = fopen("/proc/meminfo", "r");
 303         if (!fp)
 304                 panic("Cannot open /proc/meminfo!\n");
 305
 306         memset(buff, 0, sizeof(buff));
 307
 308         while (fgets(buff, sizeof(buff), fp) != NULL) {
 309                 buff[sizeof(buff) - 1] = 0;
 310
 311                 if ((ptr = strstr(buff, "MemTotal:"))) {
 312                         ptr += strlen("MemTotal:");
 313                         stats->mem_total = strtol(ptr, &ptr, 10);
 314                 } else if ((ptr = strstr(buff, "MemFree:"))) {
 315                         ptr += strlen("MemFree:");
 316                         stats->mem_free = strtol(ptr, &ptr, 10);
 317                 }
 318
 319                 memset(buff, 0, sizeof(buff));
 320         }
 321
 322         fclose(fp);
 323         return 0;
 324 }
 325
 326 static int stats_proc_system(struct ifstat *stats)
 327 {
 328         int cpu, cpus;
 329         char *ptr, buff[256];
 330         FILE *fp;
 331
 332         fp = fopen("/proc/stat", "r");
 333         if (!fp)
 334                 panic("Cannot open /proc/stat!\n");
 335
 336         cpus = get_number_cpus();
 337         bug_on(cpus > MAX_CPUS);
 338
 339         memset(buff, 0, sizeof(buff));
 340
 341         while (fgets(buff, sizeof(buff), fp) != NULL) {
 342                 buff[sizeof(buff) - 1] = 0;
 343
 344                 if ((ptr = strstr(buff, "cpu"))) {
 345                         ptr += strlen("cpu");
 346                         if (isblank(*ptr))
 347                                 goto next;
 348
 349                         cpu = strtol(ptr, &ptr, 10);
 350                         bug_on(cpu > cpus);
 351
 352                         if (sscanf(ptr, "%lu%lu%lu%lu%lu",
 353                                    &stats->cpu_user[cpu],
 354                                    &stats->cpu_nice[cpu],
 355                                    &stats->cpu_sys[cpu],
 356                                    &stats->cpu_idle[cpu],
 357                                    &stats->cpu_iow[cpu]) != 5)
 358                                 goto next;
 359                 } else if ((ptr = strstr(buff, "ctxt"))) {
 360                         ptr += strlen("ctxt");
 361                         stats->cswitch = strtoul(ptr, &ptr, 10);
 362                 } else if ((ptr = strstr(buff, "processes"))) {
 363                         ptr += strlen("processes");
 364                         stats->forks = strtoul(ptr, &ptr, 10);
 365                 } else if ((ptr = strstr(buff, "procs_running"))) {
 366                         ptr += strlen("procs_running");
 367                         stats->procs_run = strtoul(ptr, &ptr, 10);
 368                 } else if ((ptr = strstr(buff, "procs_blocked"))) {
 369                         ptr += strlen("procs_blocked");
 370                         stats->procs_iow = strtoul(ptr, &ptr, 10);
 371                 }
 372 next:
 373                 memset(buff, 0, sizeof(buff));
 374         }
 375
 376         fclose(fp);
 377         return 0;
 378 }
 379
 380 static int stats_wireless(const char *ifname, struct ifstat *stats)
 381 {
 382         int ret;
 383         struct iw_statistics ws;
 384
 385         ret = wireless_sigqual(ifname, &ws);
 386         if (ret != 0) {
 387                 stats->wifi.bitrate = 0;
 388                 return -EINVAL;
 389         }
 390
 391         stats->wifi.bitrate = wireless_bitrate(ifname);
 392
 393         stats->wifi.signal_level =
 394                 adjust_dbm_level(ws.qual.updated & IW_QUAL_DBM, ws.qual.level);
 395
 396         stats->wifi.link_qual = ws.qual.qual;
 397         stats->wifi.link_qual_max = wireless_rangemax_sigqual(ifname);
 398
 399         return ret;
 400 }
 401
 402 #define DIFF1(member)   do { diff->member = new->member - old->member; } while (0)
 403 #define DIFF(member)    do { \
 404                 if (sizeof(diff->member) != sizeof(new->member) || \
 405                     sizeof(diff->member) != sizeof(old->member)) \
 406                         bug(); \
 407                 bug_on((new->member - old->member) > (new->member)); \
 408                 DIFF1(member); \
 409         } while (0)
 410
 411 static void stats_diff(struct ifstat *old, struct ifstat *new,
 412                        struct ifstat *diff)
 413 {
 414         int cpus, i;
 415
 416         DIFF(rx_bytes);
 417         DIFF(rx_packets);
 418         DIFF(rx_drops);
 419         DIFF(rx_errors);
 420         DIFF(rx_fifo);
 421         DIFF(rx_frame);
 422         DIFF(rx_multi);
 423
 424         DIFF(tx_bytes);
 425         DIFF(tx_bytes);
 426         DIFF(tx_packets);
 427         DIFF(tx_drops);
 428         DIFF(tx_errors);
 429         DIFF(tx_fifo);
 430         DIFF(tx_colls);
 431         DIFF(tx_carrier);
 432
 433         DIFF1(procs_run);
 434         DIFF1(procs_iow);
 435
 436         DIFF1(wifi.signal_level);
 437         DIFF1(wifi.link_qual);
 438
 439         DIFF1(cswitch);
 440         DIFF1(forks);
 441
 442         cpus = get_number_cpus();
 443         bug_on(cpus > MAX_CPUS);
 444
 445         for (i = 0; i < cpus; ++i) {
 446                 DIFF(irqs[i]);
 447                 DIFF(irqs_srx[i]);
 448                 DIFF(irqs_stx[i]);
 449
 450                 DIFF1(cpu_user[i]);
 451                 DIFF1(cpu_nice[i]);
 452                 DIFF1(cpu_sys[i]);
 453                 DIFF1(cpu_idle[i]);
 454                 DIFF1(cpu_iow[i]);
 455         }
 456 }
 457
 458 static void stats_fetch(const char *ifname, struct ifstat *stats)
 459 {
 460         if (stats_proc_net_dev(ifname, stats) < 0)
 461                 panic("Cannot fetch device stats!\n");
 462         if (stats_proc_softirqs(stats) < 0)
 463                 panic("Cannot fetch software interrupts!\n");
 464         if (stats_proc_memory(stats) < 0)
 465                 panic("Cannot fetch memory stats!\n");
 466         if (stats_proc_system(stats) < 0)
 467                 panic("Cannot fetch system stats!\n");
 468
 469         stats_proc_interrupts((char *) ifname, stats);
 470
 471         stats_wireless(ifname, stats);
 472 }
 473
 474 static void stats_sample_generic(const char *ifname, uint64_t ms_interval)
 475 {
 476         memset(&stats_old, 0, sizeof(stats_old));
 477         memset(&stats_new, 0, sizeof(stats_new));
 478         memset(&stats_delta, 0, sizeof(stats_delta));
 479
 480         stats_fetch(ifname, &stats_old);
 481         usleep(ms_interval * 1000);
 482         stats_fetch(ifname, &stats_new);
 483
 484         stats_diff(&stats_old, &stats_new, &stats_delta);
 485 }
 486
 487 static void screen_init(WINDOW **screen)
 488 {
 489         (*screen) = initscr();
 490
 491         raw();
 492         noecho();
 493         cbreak();
 494         nodelay((*screen), TRUE);
 495
 496         keypad(stdscr, TRUE);
 497
 498         refresh();
 499         wrefresh((*screen));
 500 }
 501
 502 static void screen_header(WINDOW *screen, const char *ifname, int *voff,
 503                           uint64_t ms_interval)
 504 {
 505         size_t len = 0;
 506         char buff[64];
 507         struct ethtool_drvinfo drvinf;
 508         u32 rate = device_bitrate(ifname);
 509         int link = ethtool_link(ifname);
 510
 511         memset(&drvinf, 0, sizeof(drvinf));
 512         ethtool_drvinf(ifname, &drvinf);
 513
 514         memset(buff, 0, sizeof(buff));
 515         if (rate)
 516                 len += snprintf(buff + len, sizeof(buff) - len, " %uMbit/s", rate);
 517         if (link >= 0)
 518                 len += snprintf(buff + len, sizeof(buff) - len, " link:%s",
 519                                 link == 0 ? "no" : "yes");
 520
 521         mvwprintw(screen, (*voff)++, 2,
 522                   "Kernel net/sys statistics for %s (%s%s), t=%lums"
 523                   "               ",
 524                   ifname, drvinf.driver, buff, ms_interval);
 525 }
 526
 527 static void screen_net_dev_rel(WINDOW *screen, const struct ifstat *rel,
 528                                int *voff)
 529 {
 530         attron(A_REVERSE);
 531
 532         mvwprintw(screen, (*voff)++, 0,
 533                   "  RX: %16.3llf MiB/t "
 534                         "%10llu pkts/t "
 535                         "%10llu drops/t "
 536                         "%10llu errors/t  ",
 537                   ((long double) rel->rx_bytes) / (1LLU << 20),
 538                   rel->rx_packets, rel->rx_drops, rel->rx_errors);
 539
 540         mvwprintw(screen, (*voff)++, 0,
 541                   "  TX: %16.3llf MiB/t "
 542                         "%10llu pkts/t "
 543                         "%10llu drops/t "
 544                         "%10llu errors/t  ",
 545                   ((long double) rel->tx_bytes) / (1LLU << 20),
 546                   rel->tx_packets, rel->tx_drops, rel->tx_errors);
 547
 548         attroff(A_REVERSE);
 549 }
 550
 551 static void screen_net_dev_abs(WINDOW *screen, const struct ifstat *abs,
 552                                int *voff)
 553 {
 554         mvwprintw(screen, (*voff)++, 2,
 555                   "RX: %16.3llf MiB   "
 556                       "%10llu pkts   "
 557                       "%10llu drops   "
 558                       "%10llu errors",
 559                   ((long double) abs->rx_bytes) / (1LLU << 20),
 560                   abs->rx_packets, abs->rx_drops, abs->rx_errors);
 561
 562         mvwprintw(screen, (*voff)++, 2,
 563                   "TX: %16.3llf MiB   "
 564                       "%10llu pkts   "
 565                       "%10llu drops   "
 566                       "%10llu errors",
 567                   ((long double) abs->tx_bytes) / (1LLU << 20),
 568                   abs->tx_packets, abs->tx_drops, abs->tx_errors);
 569 }
 570
 571 static void screen_sys_mem(WINDOW *screen, const struct ifstat *rel,
 572                            const struct ifstat *abs, int *voff)
 573 {
 574         mvwprintw(screen, (*voff)++, 2,
 575                   "SYS:  %14u cs/t "
 576                         "%10.1lf%% mem "
 577                         "%13u running "
 578                         "%10u iowait",
 579                   rel->cswitch,
 580                   (100.0 * (abs->mem_total - abs->mem_free)) / abs->mem_total,
 581                   abs->procs_run, abs->procs_iow);
 582 }
 583
 584 static void screen_percpu_states(WINDOW *screen, const struct ifstat *rel,
 585                                  int cpus, int *voff)
 586 {
 587         int i;
 588         uint64_t all;
 589
 590         for (i = 0; i < cpus; ++i) {
 591                 all = rel->cpu_user[i] + rel->cpu_nice[i] + rel->cpu_sys[i] +
 592                       rel->cpu_idle[i] + rel->cpu_iow[i];
 593
 594                 mvwprintw(screen, (*voff)++, 2,
 595                           "CPU%d: %13.1lf%% usr/t "
 596                                  "%9.1lf%% sys/t "
 597                                  "%10.1lf%% idl/t "
 598                                  "%11.1lf%% iow/t  ", i,
 599                           100.0 * (rel->cpu_user[i] + rel->cpu_nice[i]) / all,
 600                           100.0 * rel->cpu_sys[i] / all,
 601                           100.0 * rel->cpu_idle[i] / all,
 602                           100.0 * rel->cpu_iow[i] / all);
 603         }
 604 }
 605
 606 static void screen_percpu_irqs_rel(WINDOW *screen, const struct ifstat *rel,
 607                                    int cpus, int *voff)
 608 {
 609         int i;
 610
 611         for (i = 0; i < cpus; ++i) {
 612                 mvwprintw(screen, (*voff)++, 2,
 613                           "CPU%d: %14llu irqs/t   "
 614                                  "%15llu soirq RX/t   "
 615                                  "%15llu soirq TX/t      ", i,
 616                           rel->irqs[i],
 617                           rel->irqs_srx[i],
 618                           rel->irqs_stx[i]);
 619         }
 620 }
 621
 622 static void screen_percpu_irqs_abs(WINDOW *screen, const struct ifstat *abs,
 623                                    int cpus, int *voff)
 624 {
 625         int i;
 626
 627         for (i = 0; i < cpus; ++i) {
 628                 mvwprintw(screen, (*voff)++, 2,
 629                           "CPU%d: %14llu irqs", i,
 630                           abs->irqs[i]);
 631         }
 632 }
 633
 634 static void screen_wireless(WINDOW *screen, const struct ifstat *rel,
 635                             const struct ifstat *abs, int *voff)
 636 {
 637         if (iswireless(abs)) {
 638                 mvwprintw(screen, (*voff)++, 2,
 639                           "LinkQual: %7d/%d (%d/t)          ",
 640                           abs->wifi.link_qual,
 641                           abs->wifi.link_qual_max,
 642                           rel->wifi.link_qual);
 643
 644                 mvwprintw(screen, (*voff)++, 2,
 645                           "Signal: %8d dBm (%d dBm/t)       ",
 646                           abs->wifi.signal_level,
 647                           rel->wifi.signal_level);
 648         }
 649 }
 650
 651 static void screen_update(WINDOW *screen, const char *ifname, const struct ifstat *rel,
 652                           const struct ifstat *abs, int *first, uint64_t ms_interval)
 653 {
 654         int cpus, voff = 1, cvoff = 2;
 655
 656         curs_set(0);
 657
 658         cpus = get_number_cpus();
 659         bug_on(cpus > MAX_CPUS);
 660
 661         screen_header(screen, ifname, &voff, ms_interval);
 662
 663         voff++;
 664         screen_net_dev_rel(screen, rel, &voff);
 665
 666         voff++;
 667         screen_net_dev_abs(screen, abs, &voff);
 668
 669         voff++;
 670         screen_sys_mem(screen, rel, abs, &voff);
 671
 672         voff++;
 673         screen_percpu_states(screen, rel, cpus, &voff);
 674
 675         voff++;
 676         screen_percpu_irqs_rel(screen, rel, cpus, &voff);
 677
 678         voff++;
 679         screen_percpu_irqs_abs(screen, abs, cpus, &voff);
 680
 681         voff++;
 682         screen_wireless(screen, rel, abs, &voff);
 683
 684         if (*first) {
 685                 mvwprintw(screen, cvoff, 2, "Collecting data ...");
 686                 *first = 0;
 687         } else {
 688                 mvwprintw(screen, cvoff, 2, "                   ");
 689         }
 690
 691         wrefresh(screen);
 692         refresh();
 693 }
 694
 695 static void screen_end(void)
 696 {
 697         endwin();
 698 }
 699
 700 static int screen_main(const char *ifname, uint64_t ms_interval)
 701 {
 702         int first = 1, key;
 703
 704         screen_init(&stats_screen);
 705
 706         while (!sigint) {
 707                 key = getch();
 708                 if (key == 'q' || key == 0x1b || key == KEY_F(10))
 709                         break;
 710
 711                 screen_update(stats_screen, ifname, &stats_delta, &stats_new,
 712                               &first, ms_interval);
 713
 714                 stats_sample_generic(ifname, ms_interval);
 715         }
 716
 717         screen_end();
 718
 719         return 0;
 720 }
 721
 722 static void term_csv(const char *ifname, const struct ifstat *rel,
 723                      const struct ifstat *abs, uint64_t ms_interval)
 724 {
 725         int cpus, i;
 726
 727         printf("%ld ", time(0));
 728
 729         printf("%llu ", rel->rx_bytes);
 730         printf("%llu ", rel->rx_packets);
 731         printf("%llu ", rel->rx_drops);
 732         printf("%llu ", rel->rx_errors);
 733
 734         printf("%llu ", abs->rx_bytes);
 735         printf("%llu ", abs->rx_packets);
 736         printf("%llu ", abs->rx_drops);
 737         printf("%llu ", abs->rx_errors);
 738
 739         printf("%llu ", rel->tx_bytes);
 740         printf("%llu ", rel->tx_packets);
 741         printf("%llu ", rel->tx_drops);
 742         printf("%llu ", rel->tx_errors);
 743
 744         printf("%llu ", abs->tx_bytes);
 745         printf("%llu ", abs->tx_packets);
 746         printf("%llu ", abs->tx_drops);
 747         printf("%llu ", abs->tx_errors);
 748
 749         printf("%u ",  rel->cswitch);
 750         printf("%lu ", abs->mem_free);
 751         printf("%lu ", abs->mem_total - abs->mem_free);
 752         printf("%lu ", abs->mem_total);
 753         printf("%u ",  abs->procs_run);
 754         printf("%u ",  abs->procs_iow);
 755
 756         cpus = get_number_cpus();
 757         bug_on(cpus > MAX_CPUS);
 758
 759         for (i = 0; i < cpus; ++i) {
 760                 printf("%lu ", rel->cpu_user[i]);
 761                 printf("%lu ", rel->cpu_nice[i]);
 762                 printf("%lu ", rel->cpu_sys[i]);
 763                 printf("%lu ", rel->cpu_idle[i]);
 764                 printf("%lu ", rel->cpu_iow[i]);
 765
 766                 printf("%llu ", rel->irqs[i]);
 767                 printf("%llu ", abs->irqs[i]);
 768
 769                 printf("%llu ", rel->irqs_srx[i]);
 770                 printf("%llu ", abs->irqs_srx[i]);
 771
 772                 printf("%llu ", rel->irqs_stx[i]);
 773                 printf("%llu ", abs->irqs_stx[i]);
 774         }
 775
 776         if (iswireless(abs)) {
 777                 printf("%u ", rel->wifi.link_qual);
 778                 printf("%u ", abs->wifi.link_qual);
 779                 printf("%u ", abs->wifi.link_qual_max);
 780
 781                 printf("%d ", rel->wifi.signal_level);
 782                 printf("%d ", abs->wifi.signal_level);
 783         }
 784
 785         puts("");
 786         fflush(stdout);
 787 }
 788
 789 static void term_csv_header(const char *ifname, const struct ifstat *abs,
 790                             uint64_t ms_interval)
 791 {
 792         int cpus, i, j = 1;
 793
 794         printf("# gnuplot dump (#col:description)\n");
 795         printf("# networking interface: %s\n", ifname);
 796         printf("# sampling interval (t): %lu ms\n", ms_interval);
 797         printf("# %d:unixtime ", j++);
 798
 799         printf("%d:rx-bytes-per-t ", j++);
 800         printf("%d:rx-pkts-per-t ", j++);
 801         printf("%d:rx-drops-per-t ", j++);
 802         printf("%d:rx-errors-per-t ", j++);
 803
 804         printf("%d:rx-bytes ", j++);
 805         printf("%d:rx-pkts ", j++);
 806         printf("%d:rx-drops ", j++);
 807         printf("%d:rx-errors ", j++);
 808
 809         printf("%d:tx-bytes-per-t ", j++);
 810         printf("%d:tx-pkts-per-t ", j++);
 811         printf("%d:tx-drops-per-t ", j++);
 812         printf("%d:tx-errors-per-t ", j++);
 813
 814         printf("%d:tx-bytes ", j++);
 815         printf("%d:tx-pkts ", j++);
 816         printf("%d:tx-drops ", j++);
 817         printf("%d:tx-errors ", j++);
 818
 819         printf("%d:context-switches-per-t ", j++);
 820         printf("%d:mem-free ", j++);
 821         printf("%d:mem-used ", j++);
 822         printf("%d:mem-total ", j++);
 823         printf("%d:procs-in-run ", j++);
 824         printf("%d:procs-in-iow ", j++);
 825
 826         cpus = get_number_cpus();
 827         bug_on(cpus > MAX_CPUS);
 828
 829         for (i = 0, j = 22; i < cpus; ++i) {
 830                 printf("%d:cpu%i-usr-per-t ", j++, i);
 831                 printf("%d:cpu%i-nice-per-t ", j++, i);
 832                 printf("%d:cpu%i-sys-per-t ", j++, i);
 833                 printf("%d:cpu%i-idle-per-t ", j++, i);
 834                 printf("%d:cpu%i-iow-per-t ", j++, i);
 835
 836                 printf("%d:cpu%i-net-irqs-per-t ", j++, i);
 837                 printf("%d:cpu%i-net-irqs ", j++, i);
 838
 839                 printf("%d:cpu%i-net-rx-soft-irqs-per-t ", j++, i);
 840                 printf("%d:cpu%i-net-rx-soft-irqs ", j++, i);
 841                 printf("%d:cpu%i-net-tx-soft-irqs-per-t ", j++, i);
 842                 printf("%d:cpu%i-net-tx-soft-irqs ", j++, i);
 843         }
 844
 845         if (iswireless(abs)) {
 846                 printf("%d:wifi-link-qual-per-t ", j++);
 847                 printf("%d:wifi-link-qual ", j++);
 848                 printf("%d:wifi-link-qual-max ", j++);
 849
 850                 printf("%d:wifi-signal-dbm-per-t ", j++);
 851                 printf("%d:wifi-signal-dbm ", j++);
 852         }
 853
 854         puts("");
 855         printf("# data:\n");
 856         fflush(stdout);
 857 }
 858
 859 static int term_main(const char *ifname, uint64_t ms_interval)
 860 {
 861         int first = 1;
 862
 863         do {
 864                 stats_sample_generic(ifname, ms_interval);
 865
 866                 if (first) {
 867                         first = 0;
 868                         term_csv_header(ifname, &stats_new, ms_interval);
 869                 }
 870
 871                 term_csv(ifname, &stats_delta, &stats_new, ms_interval);
 872         } while (stats_loop && !sigint);
 873
 874         return 0;
 875 }
 876
 877 int main(int argc, char **argv)
 878 {
 879         short ifflags = 0;
 880         int c, opt_index, ret, promisc = 0;
 881         uint64_t interval = 1000;
 882         char *ifname = NULL;
 883         int (*func_main)(const char *ifname, uint64_t ms_interval) = screen_main;
 884
 885         setfsuid(getuid());
 886         setfsgid(getgid());
 887
 888         while ((c = getopt_long(argc, argv, short_options, long_options,
 889                &opt_index)) != EOF) {
 890                 switch (c) {
 891                 case 'h':
 892                         help();
 893                         break;
 894                 case 'v':
 895                         version();
 896                         break;
 897                 case 'd':
 898                         ifname = xstrndup(optarg, IFNAMSIZ);
 899                         break;
 900                 case 't':
 901                         interval = strtol(optarg, NULL, 10);
 902                         break;
 903                 case 'l':
 904                         stats_loop = 1;
 905                         break;
 906                 case 'p':
 907                         promisc = 1;
 908                         break;
 909                 case 'c':
 910                         func_main = term_main;
 911                         break;
 912                 case '?':
 913                         switch (optopt) {
 914                         case 'd':
 915                         case 't':
 916                                 panic("Option -%c requires an argument!\n",
 917                                       optopt);
 918                         default:
 919                                 if (isprint(optopt))
 920                                         whine("Unknown option character "
 921                                               "`0x%X\'!\n", optopt);
 922                                 die();
 923                         }
 924                 default:
 925                         break;
 926                 }
 927         }
 928
 929         if (argc == 1)
 930                 help();
 931
 932         if (argc == 2)
 933                 ifname = xstrndup(argv[1], IFNAMSIZ);
 934         if (ifname == NULL)
 935                 panic("No networking device given!\n");
 936
 937         if (!strncmp("lo", ifname, IFNAMSIZ))
 938                 panic("lo is not supported!\n");
 939         if (device_mtu(ifname) == 0)
 940                 panic("This is no networking device!\n");
 941
 942         register_signal(SIGINT, signal_handler);
 943         register_signal(SIGHUP, signal_handler);
 944
 945         if (promisc)
 946                 ifflags = enter_promiscuous_mode(ifname);
 947         ret = func_main(ifname, interval);
 948         if (promisc)
 949                 leave_promiscuous_mode(ifname, ifflags);
 950
 951         xfree(ifname);
 952         return ret;
 953 }