usr.bin/systat/netbw.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
  42 #include <netinet/in.h>
  43 #include <arpa/inet.h>
  44 #include <net/route.h>
  45 #include <netinet/in_systm.h>
  46 #include <netinet/ip.h>
  47 #ifdef INET6
  48 #include <netinet/ip6.h>
  49 #endif
  50 #include <netinet/in_pcb.h>
  51 #include <netinet/ip_icmp.h>
  52 #include <netinet/icmp_var.h>
  53 #include <netinet/ip_var.h>
  54 #include <netinet/tcp.h>
  55 #include <netinet/tcpip.h>
  56 #include <netinet/tcp_seq.h>
  57 #include <netinet/tcp_fsm.h>
  58 #include <netinet/tcp_timer.h>
  59 #include <netinet/tcp_var.h>
  60 #include <netinet/udp.h>
  61 #include <netinet/udp_var.h>
  62
  63 #include <err.h>
  64 #include <errno.h>
  65 #include <netdb.h>
  66 #include <stdlib.h>
  67 #include <string.h>
  68 #include <nlist.h>
  69 #include <paths.h>
  70 #include "systat.h"
  71 #include "extern.h"
  72
  73 struct mytcpcb {
  74         RB_ENTRY(mytcpcb)       rb_node;
  75         int                     seq;
  76         struct xtcpcb           xtcp;
  77         struct xtcpcb           last_xtcp;
  78 };
  79
  80 static int
  81 mytcpcb_cmp(struct mytcpcb *tcp1, struct mytcpcb *tcp2)
  82 {
  83         int r;
  84
  85         /*
  86          * Low local or foreign port comes first (local has priority).
  87          */
  88         if (ntohs(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_lport) >= 1024 &&
  89             ntohs(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_lport) >= 1024) {
  90                 if (ntohs(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_fport) <
  91                     ntohs(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_fport))
  92                         return(-1);
  93                 if (ntohs(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_fport) >
  94                     ntohs(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_fport))
  95                         return(1);
  96         }
  97
  98         if (ntohs(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_lport) <
  99             ntohs(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_lport))
 100                 return(-1);
 101         if (ntohs(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_lport) >
 102             ntohs(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_lport))
 103                 return(1);
 104         if (ntohs(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_fport) <
 105             ntohs(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_fport))
 106                 return(-1);
 107         if (ntohs(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_fport) >
 108             ntohs(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_fport))
 109                 return(1);
 110
 111         /*
 112          * Sort IPV4 vs IPV6 addresses
 113          */
 114         if (tcp1->xtcp.xt_inp.inp_af < tcp2->xtcp.xt_inp.inp_af)
 115                 return(-1);
 116         if (tcp1->xtcp.xt_inp.inp_af > tcp2->xtcp.xt_inp.inp_af)
 117                 return(1);
 118
 119         /*
 120          * Local and foreign addresses
 121          */
 122         if (INP_ISIPV4(&tcp1->xtcp.xt_inp)) {
 123                 if (ntohl(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_laddr.s_addr) <
 124                     ntohl(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_laddr.s_addr))
 125                         return(-1);
 126                 if (ntohl(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_laddr.s_addr) >
 127                     ntohl(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_laddr.s_addr))
 128                         return(1);
 129                 if (ntohl(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_faddr.s_addr) <
 130                     ntohl(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_faddr.s_addr))
 131                         return(-1);
 132                 if (ntohl(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_faddr.s_addr) >
 133                     ntohl(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_faddr.s_addr))
 134                         return(1);
 135         } else if (INP_ISIPV6(&tcp1->xtcp.xt_inp)) {
 136                 r = bcmp(&tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie6_faddr,
 137                          &tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie6_faddr,
 138                          sizeof(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie6_faddr));
 139                 if (r)
 140                         return(r);
 141         } else {
 142                 r = bcmp(&tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie6_faddr,
 143                          &tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie6_faddr,
 144                          sizeof(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie6_faddr));
 145                 if (r)
 146                         return(r);
 147         }
 148         return(0);
 149 }
 150
 151 struct mytcpcb_tree;
 152 RB_HEAD(mytcpcb_tree, mytcpcb);
 153 RB_PROTOTYPE(mytcpcb_tree, mytcpcb, rb_node, mytcpcb_cmp);
 154 RB_GENERATE(mytcpcb_tree, mytcpcb, rb_node, mytcpcb_cmp);
 155
 156 static struct mytcpcb_tree mytcp_tree;
 157 static struct timeval tv_curr;
 158 static struct timeval tv_last;
 159 static struct tcp_stats tcp_curr;
 160 static struct tcp_stats tcp_last;
 161 static int tcp_pcb_seq;
 162
 163 static const char *numtok(double value);
 164 static void netbwline(int row, struct mytcpcb *elm, double delta_time);
 165 const char * netaddrstr(u_char vflags, union in_dependaddr *depaddr,
 166                         u_int16_t port);
 167 static void updatepcb(struct xtcpcb *xtcp);
 168
 169 #define DELTARATE(field)        \
 170         ((double)(tcp_curr.field - tcp_last.field) / delta_time)
 171
 172 #define DELTAELM(field)         \
 173         ((double)(tcp_seq_diff_t)(elm->xtcp.field -             \
 174                                   elm->last_xtcp.field) /       \
 175          delta_time)
 176
 177 #define DELTAELMSCALE(field, scale)             \
 178         ((double)((tcp_seq_diff_t)(elm->xtcp.field -            \
 179                                    elm->last_xtcp.field) << scale) / \
 180          delta_time)
 181
 182 WINDOW *
 183 opennetbw(void)
 184 {
 185         RB_INIT(&mytcp_tree);
 186         return (subwin(stdscr, LINES-0-1, 0, 0, 0));
 187 }
 188
 189 void
 190 closenetbw(WINDOW *w)
 191 {
 192         struct mytcpcb *mytcp;
 193
 194         while ((mytcp = RB_ROOT(&mytcp_tree)) != NULL) {
 195                 RB_REMOVE(mytcpcb_tree, &mytcp_tree, mytcp);
 196                 free(mytcp);
 197         }
 198
 199         if (w != NULL) {
 200                 wclear(w);
 201                 wrefresh(w);
 202                 delwin(w);
 203         }
 204 }
 205
 206 int
 207 initnetbw(void)
 208 {
 209         return(1);
 210 }
 211
 212 void
 213 fetchnetbw(void)
 214 {
 215         struct tcp_stats tcp_array[SMP_MAXCPU];
 216         struct xtcpcb *tcp_pcbs;
 217         size_t npcbs;
 218         size_t len;
 219         size_t i;
 220         size_t j;
 221         size_t ncpus;
 222
 223         /*
 224          * Extract PCB list
 225          */
 226         len = 0;
 227         if (sysctlbyname("net.inet.tcp.pcblist", NULL, &len, NULL, 0) < 0)
 228                 return;
 229         len += 128 * sizeof(tcp_pcbs[0]);
 230         tcp_pcbs = malloc(len);
 231         if (sysctlbyname("net.inet.tcp.pcblist", tcp_pcbs, &len, NULL, 0) < 0) {
 232                 free(tcp_pcbs);
 233                 return;
 234         }
 235         npcbs = len / sizeof(tcp_pcbs[0]);
 236         ++tcp_pcb_seq;
 237
 238         for (i = 0; i < npcbs; ++i) {
 239                 if (tcp_pcbs[i].xt_len != sizeof(tcp_pcbs[0]))
 240                         break;
 241                 updatepcb(&tcp_pcbs[i]);
 242         }
 243         free(tcp_pcbs);
 244
 245         /*
 246          * General stats
 247          */
 248         len = sizeof(tcp_array);
 249         if (sysctlbyname("net.inet.tcp.stats", tcp_array, &len, NULL, 0) < 0)
 250                 return;
 251         ncpus = len / sizeof(tcp_array[0]);
 252         tcp_last = tcp_curr;
 253         tv_last = tv_curr;
 254         bzero(&tcp_curr, sizeof(tcp_curr));
 255         gettimeofday(&tv_curr, NULL);
 256
 257         for (i = 0; i < ncpus; ++i) {
 258                 for (j = 0; j < sizeof(tcp_curr) / sizeof(u_long); ++j) {
 259                         ((u_long *)&tcp_curr)[j] +=
 260                                 ((u_long *)&tcp_array[i])[j];
 261                 }
 262         }
 263 }
 264
 265 void
 266 labelnetbw(void)
 267 {
 268         wmove(wnd, 0, 0);
 269         wclrtobot(wnd);
 270 #if 0
 271         mvwaddstr(wnd, 0, LADDR, "Local Address");
 272         mvwaddstr(wnd, 0, FADDR, "Foreign Address");
 273         mvwaddstr(wnd, 0, PROTO, "Proto");
 274         mvwaddstr(wnd, 0, RCVCC, "Recv-Q");
 275         mvwaddstr(wnd, 0, SNDCC, "Send-Q");
 276         mvwaddstr(wnd, 0, STATE, "(state)");
 277 #endif
 278 }
 279
 280 void
 281 shownetbw(void)
 282 {
 283         double delta_time;
 284         struct mytcpcb *elm;
 285         struct mytcpcb *delm;
 286         int row;
 287
 288         delta_time = (double)(tv_curr.tv_sec - tv_last.tv_sec) - 1.0 +
 289                      (tv_curr.tv_usec + 1000000 - tv_last.tv_usec) / 1e6;
 290         if (delta_time < 0.1)
 291                 return;
 292
 293         mvwprintw(wnd, 0, 0,
 294                   "tcp accepts %s connects %s "
 295                   "         rcv %s snd %s rexmit %s",
 296                   numtok(DELTARATE(tcps_accepts)),
 297                   numtok(DELTARATE(tcps_connects) - DELTARATE(tcps_accepts)),
 298                   numtok(DELTARATE(tcps_rcvbyte)),
 299                   numtok(DELTARATE(tcps_sndbyte)),
 300                   numtok(DELTARATE(tcps_sndrexmitbyte)));
 301
 302         row = 2;
 303         delm = NULL;
 304         RB_FOREACH(elm, mytcpcb_tree, &mytcp_tree) {
 305                 if (delm) {
 306                         RB_REMOVE(mytcpcb_tree, &mytcp_tree, delm);
 307                         free(delm);
 308                         delm = NULL;
 309                 }
 310                 if (elm->seq == tcp_pcb_seq &&
 311                     (elm->xtcp.xt_socket.so_rcv.sb_cc ||
 312                      elm->xtcp.xt_socket.so_snd.sb_cc ||
 313                      DELTAELM(xt_tp.snd_max) ||
 314                      DELTAELM(xt_tp.rcv_nxt)
 315                     )) {
 316                         if (row < LINES - 3)
 317                                 netbwline(row, elm, delta_time);
 318                         ++row;
 319                 } else if (elm->seq != tcp_pcb_seq) {
 320                         delm = elm;
 321                 }
 322         }
 323         if (delm) {
 324                 RB_REMOVE(mytcpcb_tree, &mytcp_tree, delm);
 325                 free(delm);
 326                 delm = NULL;
 327         }
 328         wmove(wnd, row, 0);
 329         wclrtobot(wnd);
 330         mvwprintw(wnd, LINES-2, 0,
 331                   "Rate/sec, "
 332                   "R=rxpend T=txpend N=nodelay T=tstmp "
 333                   "S=sack X=winscale F=fastrec");
 334 }
 335
 336 static
 337 void
 338 netbwline(int row, struct mytcpcb *elm, double delta_time)
 339 {
 340         mvwprintw(wnd, row, 0,
 341                   "%s %s "
 342                   /*"rxb %s txb %s "*/
 343                   "rcv %s snd %s "
 344                   "[%c%c%c%c%c%c%c]",
 345                   netaddrstr(
 346                     elm->xtcp.xt_inp.inp_af,
 347                     &elm->xtcp.xt_inp.inp_inc.inc_ie.
 348                         ie_dependladdr,
 349                     ntohs(elm->xtcp.xt_inp.inp_inc.inc_ie.ie_lport)),
 350                   netaddrstr(
 351                     elm->xtcp.xt_inp.inp_af,
 352                     &elm->xtcp.xt_inp.inp_inc.inc_ie.
 353                         ie_dependfaddr,
 354                     ntohs(elm->xtcp.xt_inp.inp_inc.inc_ie.ie_fport)),
 355                 /*
 356                   numtok(elm->xtcp.xt_socket.so_rcv.sb_cc),
 357                   numtok(elm->xtcp.xt_socket.so_snd.sb_cc),
 358                 */
 359                   numtok(DELTAELM(xt_tp.rcv_nxt)),
 360                   numtok(DELTAELM(xt_tp.snd_max)),
 361                   (elm->xtcp.xt_socket.so_rcv.sb_cc > 15000 ?
 362                    'R' : ' '),
 363                   (elm->xtcp.xt_socket.so_snd.sb_cc > 15000 ?
 364                    'T' : ' '),
 365                   ((elm->xtcp.xt_tp.t_flags & TF_NODELAY) ?
 366                    'N' : ' '),
 367                   ((elm->xtcp.xt_tp.t_flags & TF_RCVD_TSTMP) ?
 368                    'T' : ' '),
 369                   ((elm->xtcp.xt_tp.t_flags &
 370                    TF_SACK_PERMITTED) ?
 371                    'S' : ' '),
 372                   ((elm->xtcp.xt_tp.t_flags & TF_RCVD_SCALE) ?
 373                    'X' : ' '),
 374                   ((elm->xtcp.xt_tp.t_flags & TF_FASTRECOVERY) ?
 375                                    'F' : ' ')
 376         );
 377         wclrtoeol(wnd);
 378 }
 379
 380 #if 0
 381 int
 382 cmdnetbw(const char *cmd __unused, char *args __unused)
 383 {
 384         fetchnetbw();
 385         shownetbw();
 386         refresh();
 387
 388         return (0);
 389 }
 390 #endif
 391
 392 #define MAXINDEXES 8
 393
 394 static
 395 const char *
 396 numtok(double value)
 397 {
 398         static char buf[MAXINDEXES][32];
 399         static int nexti;
 400         static const char *suffixes[] = { " ", "K", "M", "G", "T", NULL };
 401         int suffix = 0;
 402         const char *fmt;
 403
 404         while (value >= 1000.0 && suffixes[suffix+1]) {
 405                 value /= 1000.0;
 406                 ++suffix;
 407         }
 408         nexti = (nexti + 1) % MAXINDEXES;
 409         if (value < 0.001) {
 410                 fmt = "      ";
 411         } else if (value < 1.0) {
 412                 fmt = "%5.3f%s";
 413         } else if (value < 10.0) {
 414                 fmt = "%5.3f%s";
 415         } else if (value < 100.0) {
 416                 fmt = "%5.2f%s";
 417         } else {
 418                 fmt = "%5.1f%s";
 419         }
 420         snprintf(buf[nexti], sizeof(buf[nexti]),
 421                  fmt, value, suffixes[suffix]);
 422         return (buf[nexti]);
 423 }
 424
 425 const char *
 426 netaddrstr(u_char af, union in_dependaddr *depaddr, u_int16_t port)
 427 {
 428         static char buf[MAXINDEXES][64];
 429         static int nexta;
 430         char bufip[64];
 431
 432         nexta = (nexta + 1) % MAXINDEXES;
 433
 434         if (af == AF_INET) {
 435                 snprintf(bufip, sizeof(bufip),
 436                          "%d.%d.%d.%d",
 437                          (ntohl(depaddr->id46_addr.ia46_addr4.s_addr) >> 24) &
 438                           255,
 439                          (ntohl(depaddr->id46_addr.ia46_addr4.s_addr) >> 16) &
 440                           255,
 441                          (ntohl(depaddr->id46_addr.ia46_addr4.s_addr) >> 8) &
 442                           255,
 443                          (ntohl(depaddr->id46_addr.ia46_addr4.s_addr) >> 0) &
 444                           255);
 445                 snprintf(buf[nexta], sizeof(buf[nexta]),
 446                          "%15s:%-5d", bufip, port);
 447         } else if (af == AF_INET6) {
 448                 snprintf(bufip, sizeof(bufip),
 449                          "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
 450                          ntohs(depaddr->id6_addr.s6_addr16[0]),
 451                          ntohs(depaddr->id6_addr.s6_addr16[1]),
 452                          ntohs(depaddr->id6_addr.s6_addr16[2]),
 453                          ntohs(depaddr->id6_addr.s6_addr16[3]),
 454                          ntohs(depaddr->id6_addr.s6_addr16[4]),
 455                          ntohs(depaddr->id6_addr.s6_addr16[5]),
 456                          ntohs(depaddr->id6_addr.s6_addr16[6]),
 457                          ntohs(depaddr->id6_addr.s6_addr16[7]));
 458                 snprintf(buf[nexta], sizeof(buf[nexta]),
 459                          "%39s:%-5d", bufip, port);
 460         } else {
 461                 snprintf(bufip, sizeof(bufip), "<unknown>");
 462                 snprintf(buf[nexta], sizeof(buf[nexta]),
 463                          "%15s:%-5d", bufip, port);
 464         }
 465         return (buf[nexta]);
 466 }
 467
 468 static
 469 void
 470 updatepcb(struct xtcpcb *xtcp)
 471 {
 472         struct mytcpcb dummy;
 473         struct mytcpcb *elm;
 474
 475         dummy.xtcp = *xtcp;
 476         if ((elm = RB_FIND(mytcpcb_tree, &mytcp_tree, &dummy)) == NULL) {
 477                 elm = malloc(sizeof(*elm));
 478                 bzero(elm, sizeof(*elm));
 479                 elm->xtcp = *xtcp;
 480                 elm->last_xtcp = *xtcp;
 481                 RB_INSERT(mytcpcb_tree, &mytcp_tree, elm);
 482         } else {
 483                 elm->last_xtcp = elm->xtcp;
 484                 elm->xtcp = *xtcp;
 485         }
 486         elm->seq = tcp_pcb_seq;
 487 }