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/tcp_debug.h>
  61 #include <netinet/udp.h>
  62 #include <netinet/udp_var.h>
  63
  64 #include <err.h>
  65 #include <errno.h>
  66 #include <netdb.h>
  67 #include <stdlib.h>
  68 #include <string.h>
  69 #include <nlist.h>
  70 #include <paths.h>
  71 #include "systat.h"
  72 #include "extern.h"
  73
  74 struct mytcpcb {
  75         RB_ENTRY(mytcpcb)       rb_node;
  76         int                     seq;
  77         struct xtcpcb           xtcp;
  78         struct xtcpcb           last_xtcp;
  79 };
  80
  81 static int
  82 mytcpcb_cmp(struct mytcpcb *tcp1, struct mytcpcb *tcp2)
  83 {
  84         int r;
  85
  86         /*
  87          * Low local or foreign port comes first (local has priority).
  88          */
  89         if (ntohs(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_lport) >= 1024 &&
  90             ntohs(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_lport) >= 1024) {
  91                 if (ntohs(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_fport) <
  92                     ntohs(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_fport))
  93                         return(-1);
  94                 if (ntohs(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_fport) >
  95                     ntohs(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_fport))
  96                         return(1);
  97         }
  98
  99         if (ntohs(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_lport) <
 100             ntohs(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_lport))
 101                 return(-1);
 102         if (ntohs(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_lport) >
 103             ntohs(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_lport))
 104                 return(1);
 105         if (ntohs(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_fport) <
 106             ntohs(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_fport))
 107                 return(-1);
 108         if (ntohs(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_fport) >
 109             ntohs(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_fport))
 110                 return(1);
 111
 112         /*
 113          * Sort IPV4 vs IPV6 addresses
 114          */
 115         if (tcp1->xtcp.xt_inp.inp_af < tcp2->xtcp.xt_inp.inp_af)
 116                 return(-1);
 117         if (tcp1->xtcp.xt_inp.inp_af > tcp2->xtcp.xt_inp.inp_af)
 118                 return(1);
 119
 120         /*
 121          * Local and foreign addresses
 122          */
 123         if (INP_ISIPV4(&tcp1->xtcp.xt_inp)) {
 124                 if (ntohl(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_laddr.s_addr) <
 125                     ntohl(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_laddr.s_addr))
 126                         return(-1);
 127                 if (ntohl(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_laddr.s_addr) >
 128                     ntohl(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_laddr.s_addr))
 129                         return(1);
 130                 if (ntohl(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_faddr.s_addr) <
 131                     ntohl(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_faddr.s_addr))
 132                         return(-1);
 133                 if (ntohl(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie_faddr.s_addr) >
 134                     ntohl(tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie_faddr.s_addr))
 135                         return(1);
 136         } else if (INP_ISIPV6(&tcp1->xtcp.xt_inp)) {
 137                 r = bcmp(&tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie6_faddr,
 138                          &tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie6_faddr,
 139                          sizeof(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie6_faddr));
 140                 if (r)
 141                         return(r);
 142         } else {
 143                 r = bcmp(&tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie6_faddr,
 144                          &tcp2->xtcp.xt_inp.inp_inc.inc_ie.ie6_faddr,
 145                          sizeof(tcp1->xtcp.xt_inp.inp_inc.inc_ie.ie6_faddr));
 146                 if (r)
 147                         return(r);
 148         }
 149         return(0);
 150 }
 151
 152 struct mytcpcb_tree;
 153 RB_HEAD(mytcpcb_tree, mytcpcb);
 154 RB_PROTOTYPE(mytcpcb_tree, mytcpcb, rb_node, mytcpcb_cmp);
 155 RB_GENERATE(mytcpcb_tree, mytcpcb, rb_node, mytcpcb_cmp);
 156
 157 static struct mytcpcb_tree mytcp_tree;
 158 static struct timeval tv_curr;
 159 static struct timeval tv_last;
 160 static struct tcp_stats tcp_curr;
 161 static struct tcp_stats tcp_last;
 162 static int tcp_pcb_seq;
 163
 164 static const char *numtok(double value);
 165 static void netbwline(int row, struct mytcpcb *elm, double delta_time);
 166 const char * netaddrstr(u_char vflags, union in_dependaddr *depaddr,
 167                         u_int16_t port);
 168 static void updatepcb(struct xtcpcb *xtcp);
 169
 170 #define DELTARATE(field)        \
 171         ((double)(tcp_curr.field - tcp_last.field) / delta_time)
 172
 173 #define DELTAELM(field)         \
 174         ((double)(tcp_seq_diff_t)(elm->xtcp.field -             \
 175                                   elm->last_xtcp.field) /       \
 176          delta_time)
 177
 178 #define DELTAELMSCALE(field, scale)             \
 179         ((double)((tcp_seq_diff_t)(elm->xtcp.field -            \
 180                                    elm->last_xtcp.field) << scale) / \
 181          delta_time)
 182
 183 WINDOW *
 184 opennetbw(void)
 185 {
 186         RB_INIT(&mytcp_tree);
 187         return (subwin(stdscr, LINES-0-1, 0, 0, 0));
 188 }
 189
 190 void
 191 closenetbw(WINDOW *w)
 192 {
 193         struct mytcpcb *mytcp;
 194
 195         while ((mytcp = RB_ROOT(&mytcp_tree)) != NULL) {
 196                 RB_REMOVE(mytcpcb_tree, &mytcp_tree, mytcp);
 197                 free(mytcp);
 198         }
 199
 200         if (w != NULL) {
 201                 wclear(w);
 202                 wrefresh(w);
 203                 delwin(w);
 204         }
 205 }
 206
 207 int
 208 initnetbw(void)
 209 {
 210         return(1);
 211 }
 212
 213 void
 214 fetchnetbw(void)
 215 {
 216         struct tcp_stats tcp_array[SMP_MAXCPU];
 217         struct xtcpcb *tcp_pcbs;
 218         size_t npcbs;
 219         size_t len;
 220         size_t i;
 221         size_t j;
 222         size_t ncpus;
 223
 224         /*
 225          * Extract PCB list
 226          */
 227         len = 0;
 228         if (sysctlbyname("net.inet.tcp.pcblist", NULL, &len, NULL, 0) < 0)
 229                 return;
 230         len += 128 * sizeof(tcp_pcbs[0]);
 231         tcp_pcbs = malloc(len);
 232         if (sysctlbyname("net.inet.tcp.pcblist", tcp_pcbs, &len, NULL, 0) < 0) {
 233                 free(tcp_pcbs);
 234                 return;
 235         }
 236         npcbs = len / sizeof(tcp_pcbs[0]);
 237         ++tcp_pcb_seq;
 238
 239         for (i = 0; i < npcbs; ++i) {
 240                 if (tcp_pcbs[i].xt_len != sizeof(tcp_pcbs[0]))
 241                         break;
 242                 updatepcb(&tcp_pcbs[i]);
 243         }
 244         free(tcp_pcbs);
 245
 246         /*
 247          * General stats
 248          */
 249         len = sizeof(tcp_array);
 250         if (sysctlbyname("net.inet.tcp.stats", tcp_array, &len, NULL, 0) < 0)
 251                 return;
 252         ncpus = len / sizeof(tcp_array[0]);
 253         tcp_last = tcp_curr;
 254         tv_last = tv_curr;
 255         bzero(&tcp_curr, sizeof(tcp_curr));
 256         gettimeofday(&tv_curr, NULL);
 257
 258         for (i = 0; i < ncpus; ++i) {
 259                 for (j = 0; j < sizeof(tcp_curr) / sizeof(u_long); ++j) {
 260                         ((u_long *)&tcp_curr)[j] +=
 261                                 ((u_long *)&tcp_array[i])[j];
 262                 }
 263         }
 264 }
 265
 266 void
 267 labelnetbw(void)
 268 {
 269         wmove(wnd, 0, 0);
 270         wclrtobot(wnd);
 271 #if 0
 272         mvwaddstr(wnd, 0, LADDR, "Local Address");
 273         mvwaddstr(wnd, 0, FADDR, "Foreign Address");
 274         mvwaddstr(wnd, 0, PROTO, "Proto");
 275         mvwaddstr(wnd, 0, RCVCC, "Recv-Q");
 276         mvwaddstr(wnd, 0, SNDCC, "Send-Q");
 277         mvwaddstr(wnd, 0, STATE, "(state)");
 278 #endif
 279 }
 280
 281 void
 282 shownetbw(void)
 283 {
 284         double delta_time;
 285         struct mytcpcb *elm;
 286         struct mytcpcb *delm;
 287         int row;
 288
 289         delta_time = (double)(tv_curr.tv_sec - tv_last.tv_sec) - 1.0 +
 290                      (tv_curr.tv_usec + 1000000 - tv_last.tv_usec) / 1e6;
 291         if (delta_time < 0.1)
 292                 return;
 293
 294         mvwprintw(wnd, 0, 0,
 295                   "tcp accepts %s connects %s "
 296                   "         rcv %s snd %s rexmit %s",
 297                   numtok(DELTARATE(tcps_accepts)),
 298                   numtok(DELTARATE(tcps_connects) - DELTARATE(tcps_accepts)),
 299                   numtok(DELTARATE(tcps_rcvbyte)),
 300                   numtok(DELTARATE(tcps_sndbyte)),
 301                   numtok(DELTARATE(tcps_sndrexmitbyte)));
 302
 303         row = 2;
 304         delm = NULL;
 305         RB_FOREACH(elm, mytcpcb_tree, &mytcp_tree) {
 306                 if (delm) {
 307                         RB_REMOVE(mytcpcb_tree, &mytcp_tree, delm);
 308                         free(delm);
 309                         delm = NULL;
 310                 }
 311                 if (elm->seq == tcp_pcb_seq &&
 312                     (elm->xtcp.xt_socket.so_rcv.sb_cc ||
 313                      elm->xtcp.xt_socket.so_snd.sb_cc ||
 314                      DELTAELM(xt_tp.snd_max) ||
 315                      DELTAELM(xt_tp.rcv_nxt)
 316                     )) {
 317                         if (row < LINES - 3)
 318                                 netbwline(row, elm, delta_time);
 319                         ++row;
 320                 } else if (elm->seq != tcp_pcb_seq) {
 321                         delm = elm;
 322                 }
 323         }
 324         if (delm) {
 325                 RB_REMOVE(mytcpcb_tree, &mytcp_tree, delm);
 326                 free(delm);
 327                 delm = NULL;
 328         }
 329         wmove(wnd, row, 0);
 330         wclrtobot(wnd);
 331         mvwprintw(wnd, LINES-2, 0,
 332                   "Rate/sec, "
 333                   "R=rxpend T=txpend N=nodelay T=tstmp "
 334                   "S=sack X=winscale F=fastrec");
 335 }
 336
 337 static
 338 void
 339 netbwline(int row, struct mytcpcb *elm, double delta_time)
 340 {
 341         mvwprintw(wnd, row, 0,
 342                   "%s %s "
 343                   /*"rxb %s txb %s "*/
 344                   "rcv %s snd %s "
 345                   "[%c%c%c%c%c%c%c]",
 346                   netaddrstr(
 347                     elm->xtcp.xt_inp.inp_af,
 348                     &elm->xtcp.xt_inp.inp_inc.inc_ie.
 349                         ie_dependladdr,
 350                     ntohs(elm->xtcp.xt_inp.inp_inc.inc_ie.ie_lport)),
 351                   netaddrstr(
 352                     elm->xtcp.xt_inp.inp_af,
 353                     &elm->xtcp.xt_inp.inp_inc.inc_ie.
 354                         ie_dependfaddr,
 355                     ntohs(elm->xtcp.xt_inp.inp_inc.inc_ie.ie_fport)),
 356                 /*
 357                   numtok(elm->xtcp.xt_socket.so_rcv.sb_cc),
 358                   numtok(elm->xtcp.xt_socket.so_snd.sb_cc),
 359                 */
 360                   numtok(DELTAELM(xt_tp.rcv_nxt)),
 361                   numtok(DELTAELM(xt_tp.snd_max)),
 362                   (elm->xtcp.xt_socket.so_rcv.sb_cc > 15000 ?
 363                    'R' : ' '),
 364                   (elm->xtcp.xt_socket.so_snd.sb_cc > 15000 ?
 365                    'T' : ' '),
 366                   ((elm->xtcp.xt_tp.t_flags & TF_NODELAY) ?
 367                    'N' : ' '),
 368                   ((elm->xtcp.xt_tp.t_flags & TF_RCVD_TSTMP) ?
 369                    'T' : ' '),
 370                   ((elm->xtcp.xt_tp.t_flags &
 371                    TF_SACK_PERMITTED) ?
 372                    'S' : ' '),
 373                   ((elm->xtcp.xt_tp.t_flags & TF_RCVD_SCALE) ?
 374                    'X' : ' '),
 375                   ((elm->xtcp.xt_tp.t_flags & TF_FASTRECOVERY) ?
 376                                    'F' : ' ')
 377         );
 378         wclrtoeol(wnd);
 379 }
 380
 381 #if 0
 382 int
 383 cmdnetbw(const char *cmd __unused, char *args __unused)
 384 {
 385         fetchnetbw();
 386         shownetbw();
 387         refresh();
 388
 389         return (0);
 390 }
 391 #endif
 392
 393 #define MAXINDEXES 8
 394
 395 static
 396 const char *
 397 numtok(double value)
 398 {
 399         static char buf[MAXINDEXES][32];
 400         static int nexti;
 401         static const char *suffixes[] = { " ", "K", "M", "G", "T", NULL };
 402         int suffix = 0;
 403         const char *fmt;
 404
 405         while (value >= 1000.0 && suffixes[suffix+1]) {
 406                 value /= 1000.0;
 407                 ++suffix;
 408         }
 409         nexti = (nexti + 1) % MAXINDEXES;
 410         if (value < 0.001) {
 411                 fmt = "      ";
 412         } else if (value < 1.0) {
 413                 fmt = "%5.3f%s";
 414         } else if (value < 10.0) {
 415                 fmt = "%5.3f%s";
 416         } else if (value < 100.0) {
 417                 fmt = "%5.2f%s";
 418         } else {
 419                 fmt = "%5.1f%s";
 420         }
 421         snprintf(buf[nexti], sizeof(buf[nexti]),
 422                  fmt, value, suffixes[suffix]);
 423         return (buf[nexti]);
 424 }
 425
 426 const char *
 427 netaddrstr(u_char af, union in_dependaddr *depaddr, u_int16_t port)
 428 {
 429         static char buf[MAXINDEXES][64];
 430         static int nexta;
 431         char bufip[64];
 432
 433         nexta = (nexta + 1) % MAXINDEXES;
 434
 435         if (af == AF_INET) {
 436                 snprintf(bufip, sizeof(bufip),
 437                          "%d.%d.%d.%d",
 438                          (ntohl(depaddr->id46_addr.ia46_addr4.s_addr) >> 24) &
 439                           255,
 440                          (ntohl(depaddr->id46_addr.ia46_addr4.s_addr) >> 16) &
 441                           255,
 442                          (ntohl(depaddr->id46_addr.ia46_addr4.s_addr) >> 8) &
 443                           255,
 444                          (ntohl(depaddr->id46_addr.ia46_addr4.s_addr) >> 0) &
 445                           255);
 446                 snprintf(buf[nexta], sizeof(buf[nexta]),
 447                          "%15s:%-5d", bufip, port);
 448         } else if (af == AF_INET6) {
 449                 snprintf(bufip, sizeof(bufip),
 450                          "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
 451                          ntohs(depaddr->id6_addr.s6_addr16[0]),
 452                          ntohs(depaddr->id6_addr.s6_addr16[1]),
 453                          ntohs(depaddr->id6_addr.s6_addr16[2]),
 454                          ntohs(depaddr->id6_addr.s6_addr16[3]),
 455                          ntohs(depaddr->id6_addr.s6_addr16[4]),
 456                          ntohs(depaddr->id6_addr.s6_addr16[5]),
 457                          ntohs(depaddr->id6_addr.s6_addr16[6]),
 458                          ntohs(depaddr->id6_addr.s6_addr16[7]));
 459                 snprintf(buf[nexta], sizeof(buf[nexta]),
 460                          "%39s:%-5d", bufip, port);
 461         } else {
 462                 snprintf(bufip, sizeof(bufip), "<unknown>");
 463                 snprintf(buf[nexta], sizeof(buf[nexta]),
 464                          "%15s:%-5d", bufip, port);
 465         }
 466         return (buf[nexta]);
 467 }
 468
 469 static
 470 void
 471 updatepcb(struct xtcpcb *xtcp)
 472 {
 473         struct mytcpcb dummy;
 474         struct mytcpcb *elm;
 475
 476         dummy.xtcp = *xtcp;
 477         if ((elm = RB_FIND(mytcpcb_tree, &mytcp_tree, &dummy)) == NULL) {
 478                 elm = malloc(sizeof(*elm));
 479                 bzero(elm, sizeof(*elm));
 480                 elm->xtcp = *xtcp;
 481                 elm->last_xtcp = *xtcp;
 482                 RB_INSERT(mytcpcb_tree, &mytcp_tree, elm);
 483         } else {
 484                 elm->last_xtcp = elm->xtcp;
 485                 elm->xtcp = *xtcp;
 486         }
 487         elm->seq = tcp_pcb_seq;
 488 }