usr.bin/systat/pftop.c

   1 /*
   2  * Copyright (c) 2013 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@backplane.com>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34 #include <sys/param.h>
  35 #include <sys/queue.h>
  36 #include <sys/tree.h>
  37 #include <sys/socket.h>
  38 #include <sys/socketvar.h>
  39 #include <sys/protosw.h>
  40 #include <sys/sysctl.h>
  41 #include <sys/endian.h>
  42
  43 #include <netinet/in.h>
  44 #include <arpa/inet.h>
  45 #include <net/route.h>
  46 #include <net/if.h>
  47 #include <net/pf/pfvar.h>
  48 #include <netinet/in_systm.h>
  49 #include <netinet/ip.h>
  50 #ifdef INET6
  51 #include <netinet/ip6.h>
  52 #endif
  53 #include <netinet/in_pcb.h>
  54 #include <netinet/ip_icmp.h>
  55 #include <netinet/icmp_var.h>
  56 #include <netinet/ip_var.h>
  57 #include <netinet/tcp.h>
  58 #include <netinet/tcpip.h>
  59 #include <netinet/tcp_seq.h>
  60 #include <netinet/tcp_fsm.h>
  61 #include <netinet/tcp_timer.h>
  62 #include <netinet/tcp_var.h>
  63 #include <netinet/udp.h>
  64 #include <netinet/udp_var.h>
  65
  66 #include <stdio.h>
  67 #include <stdlib.h>
  68 #include <string.h>
  69 #include <unistd.h>
  70 #include <fcntl.h>
  71 #include <nlist.h>
  72 #include <paths.h>
  73 #include <err.h>
  74 #include <errno.h>
  75 #include <netdb.h>
  76
  77 #include "systat.h"
  78 #include "extern.h"
  79
  80 struct mypfstate {
  81         RB_ENTRY(mypfstate)     rb_node;
  82         int                     seq;
  83         double                  save_bw;
  84         double                  best_bw;
  85         struct pfsync_state     state;
  86         struct pfsync_state     last_state;
  87 };
  88
  89 double delta_time = 1.0;        /* for DELTARATE() initial state */
  90 double highestbw;
  91
  92 static int
  93 mypfstate_cmp(struct mypfstate *pf1, struct mypfstate *pf2)
  94 {
  95         struct pfsync_state_key *nk1, *nk2;
  96         int r;
  97
  98         if (pf1->state.proto < pf2->state.proto)
  99                 return(-1);
 100         if (pf1->state.proto > pf2->state.proto)
 101                 return(1);
 102
 103         if (pf1->state.direction == PF_OUT) {
 104                 nk1 = &pf1->state.key[PF_SK_WIRE];
 105         } else {
 106                 nk1 = &pf1->state.key[PF_SK_STACK];
 107         }
 108         if (pf2->state.direction == PF_OUT) {
 109                 nk2 = &pf2->state.key[PF_SK_WIRE];
 110         } else {
 111                 nk2 = &pf2->state.key[PF_SK_STACK];
 112         }
 113         if (pf1->state.proto == IPPROTO_TCP ||
 114             pf1->state.proto == IPPROTO_UDP ||
 115             pf1->state.proto == IPPROTO_ICMP ||
 116             pf1->state.proto == IPPROTO_ICMPV6) {
 117                 if (ntohs(nk1->port[0]) >= 1024 &&
 118                     ntohs(nk2->port[0]) >= 1024) {
 119                         if (ntohs(nk1->port[1]) < ntohs(nk2->port[1]))
 120                                 return(-1);
 121                         if (ntohs(nk1->port[1]) > ntohs(nk2->port[1]))
 122                                 return(1);
 123                 }
 124                 if (ntohs(nk1->port[0]) < ntohs(nk2->port[0]))
 125                         return(-1);
 126                 if (ntohs(nk1->port[0]) > ntohs(nk2->port[0]))
 127                         return(1);
 128                 if (ntohs(nk1->port[1]) < ntohs(nk2->port[1]))
 129                         return(-1);
 130                 if (ntohs(nk1->port[1]) > ntohs(nk2->port[1]))
 131                         return(1);
 132         }
 133
 134         /*
 135          * Sort IPV4 vs IPV6 addresses
 136          */
 137         if (pf1->state.af < pf2->state.af)
 138                 return(-1);
 139         if (pf1->state.af > pf2->state.af)
 140                 return(1);
 141
 142         /*
 143          * Local and foreign addresses
 144          */
 145         if (pf1->state.af == AF_INET) {
 146                 if (ntohl(nk1->addr[0].v4.s_addr) <
 147                     ntohl(nk2->addr[0].v4.s_addr))
 148                         return(-1);
 149                 if (ntohl(nk1->addr[0].v4.s_addr) >
 150                     ntohl(nk2->addr[0].v4.s_addr))
 151                         return(1);
 152                 if (ntohl(nk1->addr[1].v4.s_addr) <
 153                     ntohl(nk2->addr[1].v4.s_addr))
 154                         return(-1);
 155                 if (ntohl(nk1->addr[1].v4.s_addr) >
 156                     ntohl(nk2->addr[1].v4.s_addr))
 157                         return(1);
 158         } else if (pf1->state.af == AF_INET6) {
 159                 r = bcmp(&nk1->addr[0].v6,
 160                          &nk2->addr[0].v6,
 161                          sizeof(nk1->addr[0].v6));
 162                 if (r)
 163                         return(r);
 164         } else {
 165                 r = bcmp(&nk1->addr[0].v6,
 166                          &nk2->addr[0].v6,
 167                          sizeof(nk1->addr[0].v6));
 168                 if (r)
 169                         return(r);
 170         }
 171
 172         /*
 173          * Unique Identifier to prevent overloading which messes up
 174          * the bandwidth calculations.
 175          */
 176         return (memcmp(pf1->state.id, pf2->state.id, sizeof(pf1->state.id)));
 177 }
 178
 179 struct mypfstate_tree;
 180 RB_HEAD(mypfstate_tree, mypfstate);
 181 RB_PROTOTYPE(mypfstate_tree, mypfstate, rb_node, mypfstate_cmp);
 182 RB_GENERATE(mypfstate_tree, mypfstate, rb_node, mypfstate_cmp);
 183
 184 static struct mypfstate_tree mypf_tree;
 185 static struct timeval tv_curr;
 186 static struct timeval tv_last;
 187 static int tcp_pcb_seq;
 188
 189 static const char *numtok(double value, double template);
 190 static const char *netaddrstr(sa_family_t af, struct pf_addr *addr,
 191                         u_int16_t port);
 192 static const char *statestr(int proto);
 193 static void updatestate(struct pfsync_state *state);
 194 static int statebwcmp(const void *data1, const void *data2);
 195
 196 #define GETBYTES64(field)       \
 197         (be64toh(*(uint64_t *)elm->state.field))
 198 #define DELTARATE(field)        \
 199         ((double)(be64toh(*(uint64_t *)elm->state.field) - \
 200                   be64toh(*(uint64_t *)elm->last_state.field)) / delta_time)
 201
 202 WINDOW *
 203 openpftop(void)
 204 {
 205         RB_INIT(&mypf_tree);
 206         return (subwin(stdscr, LINES-0-1, 0, 0, 0));
 207 }
 208
 209 void
 210 closepftop(WINDOW *w)
 211 {
 212         struct mypfstate *mypf;
 213
 214         while ((mypf = RB_ROOT(&mypf_tree)) != NULL) {
 215                 RB_REMOVE(mypfstate_tree, &mypf_tree, mypf);
 216                 free(mypf);
 217         }
 218
 219         if (w != NULL) {
 220                 wclear(w);
 221                 wrefresh(w);
 222                 delwin(w);
 223         }
 224 }
 225
 226 int
 227 initpftop(void)
 228 {
 229         return(1);
 230 }
 231
 232 void
 233 fetchpftop(void)
 234 {
 235         struct pfioc_states ps;
 236         struct pfsync_state *states;
 237         size_t nstates;
 238         size_t i;
 239         int fd;
 240
 241         fd = open("/dev/pf", O_RDONLY);
 242         if (fd < 0)
 243                 return;
 244
 245         /*
 246          * Extract PCB list
 247          */
 248         bzero(&ps, sizeof(ps));
 249         if (ioctl(fd, DIOCGETSTATES, &ps) < 0) {
 250                 close(fd);
 251                 return;
 252         }
 253         ps.ps_len += 1024 * 1024;
 254         ps.ps_buf = malloc(ps.ps_len);
 255         if (ioctl(fd, DIOCGETSTATES, &ps) < 0) {
 256                 free(ps.ps_buf);
 257                 close(fd);
 258                 return;
 259         }
 260
 261         states = (void *)ps.ps_buf;
 262         nstates = ps.ps_len / sizeof(*states);
 263
 264         ++tcp_pcb_seq;
 265
 266         highestbw = 0.0;
 267         for (i = 0; i < nstates; ++i)
 268                 updatestate(&states[i]);
 269         free(ps.ps_buf);
 270         close(fd);
 271         states = NULL;
 272         fd = -1;
 273
 274         tv_last = tv_curr;
 275         gettimeofday(&tv_curr, NULL);
 276 }
 277
 278 void
 279 labelpftop(void)
 280 {
 281         wmove(wnd, 0, 0);
 282         wclrtobot(wnd);
 283 #if 0
 284         mvwaddstr(wnd, 0, LADDR, "Local Address");
 285         mvwaddstr(wnd, 0, FADDR, "Foreign Address");
 286         mvwaddstr(wnd, 0, PROTO, "Proto");
 287         mvwaddstr(wnd, 0, RCVCC, "Recv-Q");
 288         mvwaddstr(wnd, 0, SNDCC, "Send-Q");
 289         mvwaddstr(wnd, 0, STATE, "(state)");
 290 #endif
 291 }
 292
 293 void
 294 showpftop(void)
 295 {
 296         struct mypfstate *elm;
 297         struct mypfstate *delm;
 298         struct mypfstate **array;
 299         size_t i;
 300         size_t n;
 301         struct pfsync_state_key *nk;
 302         int row;
 303         int rxdir;
 304         int txdir;
 305
 306         delta_time = (double)(tv_curr.tv_sec - tv_last.tv_sec) - 1.0 +
 307                      (tv_curr.tv_usec + 1000000 - tv_last.tv_usec) / 1e6;
 308         if (delta_time < 0.1) {
 309                 delta_time = 0.1;       /* don't implode DELTARATE */
 310                 return;
 311         }
 312
 313         /*
 314          * Delete and collect pass
 315          */
 316         delm = NULL;
 317         i = 0;
 318         n = 1024;
 319         array = malloc(n * sizeof(*array));
 320
 321         RB_FOREACH(elm, mypfstate_tree, &mypf_tree) {
 322                 if (delm) {
 323                         RB_REMOVE(mypfstate_tree, &mypf_tree, delm);
 324                         free(delm);
 325                         delm = NULL;
 326                 }
 327
 328                 if (elm->seq == tcp_pcb_seq && elm->save_bw > 0) {
 329                         array[i++] = elm;
 330                         if (i == n) {
 331                                 n *= 2;
 332                                 array = realloc(array, n * sizeof(*array));
 333                         }
 334                 } else if (elm->seq != tcp_pcb_seq) {
 335                         delm = elm;
 336                 }
 337         }
 338         if (delm) {
 339                 RB_REMOVE(mypfstate_tree, &mypf_tree, delm);
 340                 free(delm);
 341                 delm = NULL;
 342         }
 343         qsort(array, i, sizeof(array[0]), statebwcmp);
 344
 345         row = 2;
 346         n = i;
 347         for (i = 0; i < n; ++i) {
 348                 int64_t ttl;
 349
 350                 elm = array[i];
 351                 if (elm->state.direction == PF_OUT) {
 352                         nk = &elm->state.key[PF_SK_WIRE];
 353                         rxdir = 0;
 354                         txdir = 1;
 355                 } else {
 356                         nk = &elm->state.key[PF_SK_STACK];
 357                         rxdir = 1;
 358                         txdir = 0;
 359                 }
 360                 ttl = GETBYTES64(bytes[0]) + GETBYTES64(bytes[1]);
 361                 mvwprintw(wnd, row, 0,
 362                           "%s %s | %s "
 363                           /*"rxb %s txb %s "*/
 364                           "rcv %s snd %s ttl %s",
 365                           statestr(elm->state.proto),
 366                           netaddrstr(elm->state.af, &nk->addr[0], nk->port[0]),
 367                           netaddrstr(elm->state.af, &nk->addr[1], nk->port[1]),
 368                           numtok(DELTARATE(bytes[rxdir]), highestbw),
 369                           numtok(DELTARATE(bytes[txdir]), highestbw),
 370                           numtok(ttl, ttl)
 371                 );
 372 #if 0
 373                 mvwprintw(wnd, row, 0,
 374                           "%s %s %s "
 375                           /*"rxb %s txb %s "*/
 376                           "rcv %jd-%jd snd %jd-%jd ",
 377                           statestr(elm->state.proto),
 378                           netaddrstr(elm->state.af, &nk->addr[0], nk->port[0]),
 379                           netaddrstr(elm->state.af, &nk->addr[1], nk->port[1]),
 380                           be64toh(*(uint64_t *)elm->state.bytes[0]),
 381                           be64toh(*(uint64_t *)elm->last_state.bytes[0]),
 382                           be64toh(*(uint64_t *)elm->state.bytes[1]),
 383                           be64toh(*(uint64_t *)elm->last_state.bytes[1])
 384                 );
 385 #endif
 386                 wclrtoeol(wnd);
 387                 if (++row >= LINES-3)
 388                         break;
 389         }
 390         free(array);
 391         wmove(wnd, row, 0);
 392         wclrtobot(wnd);
 393         mvwprintw(wnd, LINES-2, 0, "Rate bytes/sec, active pf states");
 394 }
 395
 396 /*
 397  * Sort by total bytes transfered, highest first
 398  */
 399 static
 400 int
 401 statebwcmp(const void *data1, const void *data2)
 402 {
 403         const struct mypfstate *elm1 = *__DECONST(struct mypfstate **, data1);
 404         const struct mypfstate *elm2 = *__DECONST(struct mypfstate **, data2);
 405         double dv;
 406
 407         dv = elm1->save_bw - elm2->save_bw;
 408         if (dv < 0)
 409                 return 1;
 410         if (dv > 0)
 411                 return -1;
 412         return 0;
 413 }
 414
 415 #if 0
 416 int
 417 cmdpftop(const char *cmd __unused, char *args __unused)
 418 {
 419         fetchpftop();
 420         showpftop();
 421         refresh();
 422
 423         return (0);
 424 }
 425 #endif
 426
 427 #define MAXINDEXES 8
 428
 429 static
 430 const char *
 431 numtok(double value, double template)
 432 {
 433         static char buf[MAXINDEXES][32];
 434         static int nexti;
 435         static const char *suffixes[] = { " ", "K", "M", "G", "T", NULL };
 436         int suffix = 0;
 437         const char *fmt;
 438
 439         while (template >= 1000.0 && suffixes[suffix+1]) {
 440                 value /= 1000.0;
 441                 template /= 1000.0;
 442                 ++suffix;
 443         }
 444         nexti = (nexti + 1) % MAXINDEXES;
 445         if (value < 0.001) {
 446                 fmt = "      ";
 447         } else if (template < 1.0) {
 448                 fmt = "%5.3f%s";
 449         } else if (template < 10.0) {
 450                 fmt = "%5.3f%s";
 451         } else if (template < 100.0) {
 452                 fmt = "%5.2f%s";
 453         } else if (template < 1000.0) {
 454                 fmt = "%5.1f%s";
 455         } else {
 456                 fmt = "<huge>";
 457         }
 458         snprintf(buf[nexti], sizeof(buf[nexti]),
 459                  fmt, value, suffixes[suffix]);
 460         return (buf[nexti]);
 461 }
 462
 463 static const char *
 464 netaddrstr(sa_family_t af, struct pf_addr *addr, u_int16_t port)
 465 {
 466         static char buf[MAXINDEXES][64];
 467         static int nexta;
 468         char bufip[64];
 469
 470         nexta = (nexta + 1) % MAXINDEXES;
 471
 472         port = ntohs(port);
 473
 474         if (af == AF_INET) {
 475                 snprintf(bufip, sizeof(bufip),
 476                          "%d.%d.%d.%d",
 477                          (ntohl(addr->v4.s_addr) >> 24) & 255,
 478                          (ntohl(addr->v4.s_addr) >> 16) & 255,
 479                          (ntohl(addr->v4.s_addr) >> 8) & 255,
 480                          (ntohl(addr->v4.s_addr) >> 0) & 255);
 481                 snprintf(buf[nexta], sizeof(buf[nexta]),
 482                          "%-20s %-5d", bufip, port);
 483         } else if (af == AF_INET6) {
 484 #if defined(PFTOP_WIDE)
 485                 snprintf(bufip, sizeof(bufip),
 486                          "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
 487                          ntohs(addr->v6.s6_addr16[0]),
 488                          ntohs(addr->v6.s6_addr16[1]),
 489                          ntohs(addr->v6.s6_addr16[2]),
 490                          ntohs(addr->v6.s6_addr16[3]),
 491                          ntohs(addr->v6.s6_addr16[4]),
 492                          ntohs(addr->v6.s6_addr16[5]),
 493                          ntohs(addr->v6.s6_addr16[6]),
 494                          ntohs(addr->v6.s6_addr16[7]));
 495                 snprintf(buf[nexta], sizeof(buf[nexta]),
 496                          "%39s %-5d", bufip, port);
 497 #else
 498                 snprintf(bufip, sizeof(bufip),
 499                          "%04x:%04x--%04x:%04x",
 500                          ntohs(addr->v6.s6_addr16[0]),
 501                          ntohs(addr->v6.s6_addr16[1]),
 502                          ntohs(addr->v6.s6_addr16[6]),
 503                          ntohs(addr->v6.s6_addr16[7]));
 504                 snprintf(buf[nexta], sizeof(buf[nexta]),
 505                          "%20s %-5d", bufip, port);
 506 #endif
 507         } else {
 508                 snprintf(bufip, sizeof(bufip), "<unknown>:%-5d", port);
 509                 snprintf(buf[nexta], sizeof(buf[nexta]),
 510                          "%15s:%-5d", bufip, port);
 511         }
 512         return (buf[nexta]);
 513 }
 514
 515 static
 516 void
 517 updatestate(struct pfsync_state *state)
 518 {
 519         struct mypfstate dummy;
 520         struct mypfstate *elm;
 521
 522         dummy.state = *state;
 523         if ((elm = RB_FIND(mypfstate_tree, &mypf_tree, &dummy)) == NULL) {
 524                 elm = malloc(sizeof(*elm));
 525                 bzero(elm, sizeof(*elm));
 526                 elm->state = *state;
 527                 elm->last_state = *state;
 528                 elm->best_bw = DELTARATE(bytes[0]) + DELTARATE(bytes[1]);
 529                 elm->save_bw = elm->best_bw;
 530                 bzero(elm->last_state.bytes,
 531                         sizeof(elm->last_state.bytes));
 532                 bzero(elm->last_state.packets,
 533                         sizeof(elm->last_state.packets));
 534                 RB_INSERT(mypfstate_tree, &mypf_tree, elm);
 535                 if (highestbw < elm->save_bw)
 536                         highestbw = elm->save_bw;
 537         } else {
 538                 elm->last_state = elm->state;
 539                 elm->state = *state;
 540                 elm->best_bw = DELTARATE(bytes[0]) + DELTARATE(bytes[1]);
 541                 if (elm->save_bw < elm->best_bw)
 542                         elm->save_bw = elm->best_bw;
 543                 else
 544                         elm->save_bw = (elm->save_bw * 7 + elm->best_bw) / 8;
 545                 if (highestbw < elm->save_bw)
 546                         highestbw = elm->save_bw;
 547         }
 548         elm->seq = tcp_pcb_seq;
 549 }
 550
 551 const char *
 552 statestr(int proto)
 553 {
 554         static char buf[32];
 555
 556         switch(proto) {
 557         case IPPROTO_TCP:
 558                 return ("tcp  ");
 559         case IPPROTO_UDP:
 560                 return ("udp  ");
 561         case IPPROTO_ICMP:
 562                 return ("icmp ");
 563         case IPPROTO_ICMPV6:
 564                 return ("icmp6");
 565         default:
 566                 snprintf(buf, sizeof(buf), "%-5d", proto);
 567                 return buf;
 568         }
 569 }