sbin/ipfw/dummynet.c

   1 /*-
   2  * Codel/FQ_Codel and PIE/FQ_PIE Code:
   3  * Copyright (C) 2016 Centre for Advanced Internet Architectures,
   4  *  Swinburne University of Technology, Melbourne, Australia.
   5  * Portions of this code were made possible in part by a gift from
   6  *  The Comcast Innovation Fund.
   7  * Implemented by Rasool Al-Saadi <ralsaadi@swin.edu.au>
   8  *
   9  * Copyright (c) 2002-2003,2010 Luigi Rizzo
  10  *
  11  * Redistribution and use in source forms, with and without modification,
  12  * are permitted provided that this entire comment appears intact.
  13  *
  14  * Redistribution in binary form may occur without any restrictions.
  15  * Obviously, it would be nice if you gave credit where credit is due
  16  * but requiring it would be too onerous.
  17  *
  18  * This software is provided ``AS IS'' without any warranties of any kind.
  19  *
  20  * $FreeBSD$
  21  *
  22  * dummynet support
  23  */
  24
  25 #define NEW_AQM
  26 #include <sys/types.h>
  27 #include <sys/socket.h>
  28 /* XXX there are several sysctl leftover here */
  29 #include <sys/sysctl.h>
  30
  31 #include "ipfw2.h"
  32
  33 #ifdef NEW_AQM
  34 #include <stdint.h>
  35 #endif
  36
  37 #include <ctype.h>
  38 #include <err.h>
  39 #include <errno.h>
  40 #include <libutil.h>
  41 #include <netdb.h>
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <string.h>
  45 #include <sysexits.h>
  46
  47 #include <net/if.h>
  48 #include <netinet/in.h>
  49 #include <netinet/ip_fw.h>
  50 #include <netinet/ip_dummynet.h>
  51 #include <arpa/inet.h>  /* inet_ntoa */
  52
  53
  54 static struct _s_x dummynet_params[] = {
  55         { "plr",                TOK_PLR },
  56         { "noerror",            TOK_NOERROR },
  57         { "buckets",            TOK_BUCKETS },
  58         { "dst-ip",             TOK_DSTIP },
  59         { "src-ip",             TOK_SRCIP },
  60         { "dst-port",           TOK_DSTPORT },
  61         { "src-port",           TOK_SRCPORT },
  62         { "proto",              TOK_PROTO },
  63         { "weight",             TOK_WEIGHT },
  64         { "lmax",               TOK_LMAX },
  65         { "maxlen",             TOK_LMAX },
  66         { "all",                TOK_ALL },
  67         { "mask",               TOK_MASK }, /* alias for both */
  68         { "sched_mask",         TOK_SCHED_MASK },
  69         { "flow_mask",          TOK_FLOW_MASK },
  70         { "droptail",           TOK_DROPTAIL },
  71         { "ecn",                TOK_ECN },
  72         { "red",                TOK_RED },
  73         { "gred",               TOK_GRED },
  74 #ifdef NEW_AQM
  75         { "codel",              TOK_CODEL}, /* Codel AQM */
  76         { "fq_codel",   TOK_FQ_CODEL}, /* FQ-Codel  */
  77         { "pie",                TOK_PIE}, /* PIE AQM */
  78         { "fq_pie",             TOK_FQ_PIE}, /* FQ-PIE */
  79 #endif
  80         { "bw",                 TOK_BW },
  81         { "bandwidth",          TOK_BW },
  82         { "delay",              TOK_DELAY },
  83         { "link",               TOK_LINK },
  84         { "pipe",               TOK_PIPE },
  85         { "queue",              TOK_QUEUE },
  86         { "flowset",            TOK_FLOWSET },
  87         { "sched",              TOK_SCHED },
  88         { "pri",                TOK_PRI },
  89         { "priority",           TOK_PRI },
  90         { "type",               TOK_TYPE },
  91         { "flow-id",            TOK_FLOWID},
  92         { "dst-ipv6",           TOK_DSTIP6},
  93         { "dst-ip6",            TOK_DSTIP6},
  94         { "src-ipv6",           TOK_SRCIP6},
  95         { "src-ip6",            TOK_SRCIP6},
  96         { "profile",            TOK_PROFILE},
  97         { "burst",              TOK_BURST},
  98         { "dummynet-params",    TOK_NULL },
  99         { NULL, 0 }     /* terminator */
 100 };
 101
 102 #ifdef NEW_AQM
 103 /* AQM/extra sched parameters  tokens*/
 104 static struct _s_x aqm_params[] = {
 105         { "target",             TOK_TARGET},
 106         { "interval",           TOK_INTERVAL},
 107         { "limit",              TOK_LIMIT},
 108         { "flows",              TOK_FLOWS},
 109         { "quantum",            TOK_QUANTUM},
 110         { "ecn",                TOK_ECN},
 111         { "noecn",              TOK_NO_ECN},
 112         { "tupdate",            TOK_TUPDATE},
 113         { "max_burst",          TOK_MAX_BURST},
 114         { "max_ecnth",  TOK_MAX_ECNTH},
 115         { "alpha",              TOK_ALPHA},
 116         { "beta",               TOK_BETA},
 117         { "capdrop",    TOK_CAPDROP},
 118         { "nocapdrop",  TOK_NO_CAPDROP},
 119         { "onoff",      TOK_ONOFF},
 120         { "dre",        TOK_DRE},
 121         { "ts", TOK_TS},
 122         { "derand",     TOK_DERAND},
 123         { "noderand",   TOK_NO_DERAND},
 124         { NULL, 0 }     /* terminator */
 125 };
 126 #endif
 127
 128 #define O_NEXT(p, len) ((void *)((char *)p + len))
 129
 130 static void
 131 oid_fill(struct dn_id *oid, int len, int type, uintptr_t id)
 132 {
 133         oid->len = len;
 134         oid->type = type;
 135         oid->subtype = 0;
 136         oid->id = id;
 137 }
 138
 139 /* make room in the buffer and move the pointer forward */
 140 static void *
 141 o_next(struct dn_id **o, int len, int type)
 142 {
 143         struct dn_id *ret = *o;
 144         oid_fill(ret, len, type, 0);
 145         *o = O_NEXT(*o, len);
 146         return ret;
 147 }
 148
 149 #ifdef NEW_AQM
 150
 151 /* Codel flags */
 152 enum {
 153         CODEL_ECN_ENABLED = 1
 154 };
 155
 156 /* PIE flags, from PIE kernel module */
 157 enum {
 158         PIE_ECN_ENABLED = 1,
 159         PIE_CAPDROP_ENABLED = 2,
 160         PIE_ON_OFF_MODE_ENABLED = 4,
 161         PIE_DEPRATEEST_ENABLED = 8,
 162         PIE_DERAND_ENABLED = 16
 163 };
 164
 165 #define PIE_FIX_POINT_BITS 13
 166 #define PIE_SCALE (1L<<PIE_FIX_POINT_BITS)
 167
 168 /* integer to time */
 169 static void
 170 us_to_time(int t, char *strt)
 171 {
 172         if (t < 0)
 173                 strt[0]='\0';
 174         else if ( t==0 )
 175                 sprintf(strt,"%d", t);
 176         else if (t< 1000)
 177                 sprintf(strt,"%dus", t);
 178         else if (t < 1000000)
 179                 sprintf(strt,"%gms", (float) t / 1000);
 180         else
 181                 sprintf(strt,"%gfs", (float) t / 1000000);
 182 }
 183
 184 /*
 185  * returns -1 if s is not a valid time, otherwise, return time in us
 186  */
 187 static long
 188 time_to_us(const char *s)
 189 {
 190         int i, dots = 0;
 191         int len = strlen(s);
 192         char strt[16]="", stru[16]="";
 193
 194         if (len>15)
 195                 return -1;
 196         for (i = 0; i<len && (isdigit(s[i]) || s[i]=='.') ; i++)
 197                 if (s[i]=='.') {
 198                         if (dots)
 199                                 return -1;
 200                         else
 201                                 dots++;
 202                 }
 203
 204         if (!i)
 205                 return -1;
 206         strncpy(strt, s, i);
 207         if (i<len)
 208                 strcpy(stru, s+i);
 209         else
 210                 strcpy(stru, "ms");
 211
 212         if (!strcasecmp(stru, "us"))
 213                 return atol(strt);
 214         if (!strcasecmp(stru, "ms"))
 215                 return (strtod(strt, NULL) * 1000);
 216         if (!strcasecmp(stru, "s"))
 217                 return (strtod(strt, NULL)*1000000);
 218
 219         return -1;
 220 }
 221
 222
 223 /* Get AQM or scheduler extra parameters  */
 224 static void
 225 get_extra_parms(uint32_t nr, char *out, int subtype)
 226 {
 227         struct dn_extra_parms *ep;
 228         int ret;
 229         char strt1[15], strt2[15], strt3[15];
 230         u_int l;
 231
 232         /* prepare the request */
 233         l = sizeof(struct dn_extra_parms);
 234         ep = safe_calloc(1, l);
 235         memset(ep, 0, sizeof(*ep));
 236         *out = '\0';
 237
 238         oid_fill(&ep->oid, l, DN_CMD_GET, DN_API_VERSION);
 239         ep->oid.len = l;
 240         ep->oid.subtype = subtype;
 241         ep->nr = nr;
 242
 243         ret = do_cmd(-IP_DUMMYNET3, ep, (uintptr_t)&l);
 244         if (ret) {
 245                 free(ep);
 246                 errx(EX_DATAERR, "Error getting extra parameters\n");
 247         }
 248
 249         switch (subtype) {
 250         case DN_AQM_PARAMS:
 251                 if( !strcasecmp(ep->name, "codel")) {
 252                         us_to_time(ep->par[0], strt1);
 253                         us_to_time(ep->par[1], strt2);
 254                         l = sprintf(out, " AQM CoDel target %s interval %s",
 255                                 strt1, strt2);
 256                         if (ep->par[2] & CODEL_ECN_ENABLED)
 257                                 l = sprintf(out + l, " ECN");
 258                         else
 259                                 l += sprintf(out + l, " NoECN");
 260                 } else if( !strcasecmp(ep->name, "pie")) {
 261                         us_to_time(ep->par[0], strt1);
 262                         us_to_time(ep->par[1], strt2);
 263                         us_to_time(ep->par[2], strt3);
 264                         l = sprintf(out, " AQM type PIE target %s tupdate %s alpha "
 265                                         "%g beta %g max_burst %s max_ecnth %.3g",
 266                                         strt1,
 267                                         strt2,
 268                                         ep->par[4] / (float) PIE_SCALE,
 269                                         ep->par[5] / (float) PIE_SCALE,
 270                                         strt3,
 271                                         ep->par[3] / (float) PIE_SCALE
 272                                 );
 273
 274                         if (ep->par[6] & PIE_ECN_ENABLED)
 275                                 l += sprintf(out + l, " ECN");
 276                         else
 277                                 l += sprintf(out + l, " NoECN");
 278                         if (ep->par[6] & PIE_CAPDROP_ENABLED)
 279                                 l += sprintf(out + l, " CapDrop");
 280                         else
 281                                 l += sprintf(out + l, " NoCapDrop");
 282                         if (ep->par[6] & PIE_ON_OFF_MODE_ENABLED)
 283                                 l += sprintf(out + l, " OnOff");
 284                         if (ep->par[6] & PIE_DEPRATEEST_ENABLED)
 285                                 l += sprintf(out + l, " DRE");
 286                         else
 287                                 l += sprintf(out + l, " TS");
 288                         if (ep->par[6] & PIE_DERAND_ENABLED)
 289                                 l += sprintf(out + l, " Derand");
 290                         else
 291                                 l += sprintf(out + l, " NoDerand");
 292                 }
 293                 break;
 294
 295         case    DN_SCH_PARAMS:
 296                 if (!strcasecmp(ep->name,"FQ_CODEL")) {
 297                         us_to_time(ep->par[0], strt1);
 298                         us_to_time(ep->par[1], strt2);
 299                         l = sprintf(out," FQ_CODEL target %s interval %s"
 300                                 " quantum %jd limit %jd flows %jd",
 301                                 strt1, strt2,
 302                                 (intmax_t) ep->par[3],
 303                                 (intmax_t) ep->par[4],
 304                                 (intmax_t) ep->par[5]
 305                                 );
 306                         if (ep->par[2] & CODEL_ECN_ENABLED)
 307                                 l += sprintf(out + l, " ECN");
 308                         else
 309                                 l += sprintf(out + l, " NoECN");
 310                         l += sprintf(out + l, "\n");
 311                 } else  if (!strcasecmp(ep->name,"FQ_PIE")) {
 312                         us_to_time(ep->par[0], strt1);
 313                         us_to_time(ep->par[1], strt2);
 314                         us_to_time(ep->par[2], strt3);
 315                         l = sprintf(out, "  FQ_PIE target %s tupdate %s alpha "
 316                                 "%g beta %g max_burst %s max_ecnth %.3g"
 317                                 " quantum %jd limit %jd flows %jd",
 318                                 strt1,
 319                                 strt2,
 320                                 ep->par[4] / (float) PIE_SCALE,
 321                                 ep->par[5] / (float) PIE_SCALE,
 322                                 strt3,
 323                                 ep->par[3] / (float) PIE_SCALE,
 324                                 (intmax_t) ep->par[7],
 325                                 (intmax_t) ep->par[8],
 326                                 (intmax_t) ep->par[9]
 327                         );
 328
 329                         if (ep->par[6] & PIE_ECN_ENABLED)
 330                                 l += sprintf(out + l, " ECN");
 331                         else
 332                                 l += sprintf(out + l, " NoECN");
 333                         if (ep->par[6] & PIE_CAPDROP_ENABLED)
 334                                 l += sprintf(out + l, " CapDrop");
 335                         else
 336                                 l += sprintf(out + l, " NoCapDrop");
 337                         if (ep->par[6] & PIE_ON_OFF_MODE_ENABLED)
 338                                 l += sprintf(out + l, " OnOff");
 339                         if (ep->par[6] & PIE_DEPRATEEST_ENABLED)
 340                                 l += sprintf(out + l, " DRE");
 341                         else
 342                                 l += sprintf(out + l, " TS");
 343                         if (ep->par[6] & PIE_DERAND_ENABLED)
 344                                 l += sprintf(out + l, " Derand");
 345                         else
 346                                 l += sprintf(out + l, " NoDerand");
 347                         l += sprintf(out + l, "\n");
 348                 }
 349                 break;
 350         }
 351
 352         free(ep);
 353 }
 354 #endif
 355
 356
 357 #if 0
 358 static int
 359 sort_q(void *arg, const void *pa, const void *pb)
 360 {
 361         int rev = (co.do_sort < 0);
 362         int field = rev ? -co.do_sort : co.do_sort;
 363         long long res = 0;
 364         const struct dn_flow_queue *a = pa;
 365         const struct dn_flow_queue *b = pb;
 366
 367         switch (field) {
 368         case 1: /* pkts */
 369                 res = a->len - b->len;
 370                 break;
 371         case 2: /* bytes */
 372                 res = a->len_bytes - b->len_bytes;
 373                 break;
 374
 375         case 3: /* tot pkts */
 376                 res = a->tot_pkts - b->tot_pkts;
 377                 break;
 378
 379         case 4: /* tot bytes */
 380                 res = a->tot_bytes - b->tot_bytes;
 381                 break;
 382         }
 383         if (res < 0)
 384                 res = -1;
 385         if (res > 0)
 386                 res = 1;
 387         return (int)(rev ? res : -res);
 388 }
 389 #endif
 390
 391 /* print a mask and header for the subsequent list of flows */
 392 static void
 393 print_mask(struct ipfw_flow_id *id)
 394 {
 395         if (!IS_IP6_FLOW_ID(id)) {
 396                 printf("    "
 397                     "mask: %s 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n",
 398                     id->extra ? "queue," : "",
 399                     id->proto,
 400                     id->src_ip, id->src_port,
 401                     id->dst_ip, id->dst_port);
 402         } else {
 403                 char buf[255];
 404                 printf("\n        mask: %sproto: 0x%02x, flow_id: 0x%08x,  ",
 405                     id->extra ? "queue," : "",
 406                     id->proto, id->flow_id6);
 407                 inet_ntop(AF_INET6, &(id->src_ip6), buf, sizeof(buf));
 408                 printf("%s/0x%04x -> ", buf, id->src_port);
 409                 inet_ntop(AF_INET6, &(id->dst_ip6), buf, sizeof(buf));
 410                 printf("%s/0x%04x\n", buf, id->dst_port);
 411         }
 412 }
 413
 414 static void
 415 print_header(struct ipfw_flow_id *id)
 416 {
 417         if (!IS_IP6_FLOW_ID(id))
 418                 printf("BKT Prot ___Source IP/port____ "
 419                     "____Dest. IP/port____ "
 420                     "Tot_pkt/bytes Pkt/Byte Drp\n");
 421         else
 422                 printf("BKT ___Prot___ _flow-id_ "
 423                     "______________Source IPv6/port_______________ "
 424                     "_______________Dest. IPv6/port_______________ "
 425                     "Tot_pkt/bytes Pkt/Byte Drp\n");
 426 }
 427
 428 static void
 429 list_flow(struct buf_pr *bp, struct dn_flow *ni)
 430 {
 431         char buff[255];
 432         struct protoent *pe = NULL;
 433         struct in_addr ina;
 434         struct ipfw_flow_id *id = &ni->fid;
 435
 436         pe = getprotobynumber(id->proto);
 437                 /* XXX: Should check for IPv4 flows */
 438         bprintf(bp, "%3u%c", (ni->oid.id) & 0xff,
 439                 id->extra ? '*' : ' ');
 440         if (!IS_IP6_FLOW_ID(id)) {
 441                 if (pe)
 442                         bprintf(bp, "%-4s ", pe->p_name);
 443                 else
 444                         bprintf(bp, "%4u ", id->proto);
 445                 ina.s_addr = htonl(id->src_ip);
 446                 bprintf(bp, "%15s/%-5d ",
 447                     inet_ntoa(ina), id->src_port);
 448                 ina.s_addr = htonl(id->dst_ip);
 449                 bprintf(bp, "%15s/%-5d ",
 450                     inet_ntoa(ina), id->dst_port);
 451         } else {
 452                 /* Print IPv6 flows */
 453                 if (pe != NULL)
 454                         bprintf(bp, "%9s ", pe->p_name);
 455                 else
 456                         bprintf(bp, "%9u ", id->proto);
 457                 bprintf(bp, "%7d  %39s/%-5d ", id->flow_id6,
 458                     inet_ntop(AF_INET6, &(id->src_ip6), buff, sizeof(buff)),
 459                     id->src_port);
 460                 bprintf(bp, " %39s/%-5d ",
 461                     inet_ntop(AF_INET6, &(id->dst_ip6), buff, sizeof(buff)),
 462                     id->dst_port);
 463         }
 464         pr_u64(bp, &ni->tot_pkts, 4);
 465         pr_u64(bp, &ni->tot_bytes, 8);
 466         bprintf(bp, "%2u %4u %3u",
 467             ni->length, ni->len_bytes, ni->drops);
 468 }
 469
 470 static void
 471 print_flowset_parms(struct dn_fs *fs, char *prefix)
 472 {
 473         int l;
 474         char qs[30];
 475         char plr[30];
 476         char red[200];  /* Display RED parameters */
 477
 478         l = fs->qsize;
 479         if (fs->flags & DN_QSIZE_BYTES) {
 480                 if (l >= 8192)
 481                         sprintf(qs, "%d KB", l / 1024);
 482                 else
 483                         sprintf(qs, "%d B", l);
 484         } else
 485                 sprintf(qs, "%3d sl.", l);
 486         if (fs->plr)
 487                 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff));
 488         else
 489                 plr[0] = '\0';
 490
 491         if (fs->flags & DN_IS_RED) {    /* RED parameters */
 492                 sprintf(red,
 493                     "\n\t %cRED w_q %f min_th %d max_th %d max_p %f",
 494                     (fs->flags & DN_IS_GENTLE_RED) ? 'G' : ' ',
 495                     1.0 * fs->w_q / (double)(1 << SCALE_RED),
 496                     fs->min_th,
 497                     fs->max_th,
 498                     1.0 * fs->max_p / (double)(1 << SCALE_RED));
 499                 if (fs->flags & DN_IS_ECN)
 500                         strlcat(red, " (ecn)", sizeof(red));
 501 #ifdef NEW_AQM
 502         /* get AQM parameters */
 503         } else if (fs->flags & DN_IS_AQM) {
 504                         get_extra_parms(fs->fs_nr, red, DN_AQM_PARAMS);
 505 #endif
 506         } else
 507                 sprintf(red, "droptail");
 508
 509         if (prefix[0]) {
 510             printf("%s %s%s %d queues (%d buckets) %s\n",
 511                 prefix, qs, plr, fs->oid.id, fs->buckets, red);
 512             prefix[0] = '\0';
 513         } else {
 514             printf("q%05d %s%s %d flows (%d buckets) sched %d "
 515                         "weight %d lmax %d pri %d %s\n",
 516                 fs->fs_nr, qs, plr, fs->oid.id, fs->buckets,
 517                 fs->sched_nr, fs->par[0], fs->par[1], fs->par[2], red);
 518             if (fs->flags & DN_HAVE_MASK)
 519                 print_mask(&fs->flow_mask);
 520         }
 521 }
 522
 523 static void
 524 print_extra_delay_parms(struct dn_profile *p)
 525 {
 526         double loss;
 527         if (p->samples_no <= 0)
 528                 return;
 529
 530         loss = p->loss_level;
 531         loss /= p->samples_no;
 532         printf("\t profile: name \"%s\" loss %f samples %d\n",
 533                 p->name, loss, p->samples_no);
 534 }
 535
 536 static void
 537 flush_buf(char *buf)
 538 {
 539         if (buf[0])
 540                 printf("%s\n", buf);
 541         buf[0] = '\0';
 542 }
 543
 544 /*
 545  * generic list routine. We expect objects in a specific order, i.e.
 546  * PIPES AND SCHEDULERS:
 547  *      link; scheduler; internal flowset if any; instances
 548  * we can tell a pipe from the number.
 549  *
 550  * FLOWSETS:
 551  *      flowset; queues;
 552  * link i (int queue); scheduler i; si(i) { flowsets() : queues }
 553  */
 554 static void
 555 list_pipes(struct dn_id *oid, struct dn_id *end)
 556 {
 557     char buf[160];      /* pending buffer */
 558     int toPrint = 1;    /* print header */
 559     struct buf_pr bp;
 560
 561     buf[0] = '\0';
 562     bp_alloc(&bp, 4096);
 563     for (; oid != end; oid = O_NEXT(oid, oid->len)) {
 564         if (oid->len < sizeof(*oid))
 565                 errx(1, "invalid oid len %d\n", oid->len);
 566
 567         switch (oid->type) {
 568         default:
 569             flush_buf(buf);
 570             printf("unrecognized object %d size %d\n", oid->type, oid->len);
 571             break;
 572         case DN_TEXT: /* list of attached flowsets */
 573             {
 574                 int i, l;
 575                 struct {
 576                         struct dn_id id;
 577                         uint32_t p[0];
 578                 } *d = (void *)oid;
 579                 l = (oid->len - sizeof(*oid))/sizeof(d->p[0]);
 580                 if (l == 0)
 581                     break;
 582                 printf("   Children flowsets: ");
 583                 for (i = 0; i < l; i++)
 584                         printf("%u ", d->p[i]);
 585                 printf("\n");
 586                 break;
 587             }
 588         case DN_CMD_GET:
 589             if (g_co.verbose)
 590                 printf("answer for cmd %d, len %d\n", oid->type, oid->id);
 591             break;
 592         case DN_SCH: {
 593             struct dn_sch *s = (struct dn_sch *)oid;
 594             flush_buf(buf);
 595             printf(" sched %d type %s flags 0x%x %d buckets %d active\n",
 596                         s->sched_nr,
 597                         s->name, s->flags, s->buckets, s->oid.id);
 598 #ifdef NEW_AQM
 599                 char parms[200];
 600                 get_extra_parms(s->sched_nr, parms, DN_SCH_PARAMS);
 601                 printf("%s",parms);
 602 #endif
 603             if (s->flags & DN_HAVE_MASK)
 604                 print_mask(&s->sched_mask);
 605             }
 606             break;
 607
 608         case DN_FLOW:
 609             if (toPrint != 0) {
 610                     print_header(&((struct dn_flow *)oid)->fid);
 611                     toPrint = 0;
 612             }
 613             list_flow(&bp, (struct dn_flow *)oid);
 614             printf("%s\n", bp.buf);
 615             bp_flush(&bp);
 616             break;
 617
 618         case DN_LINK: {
 619             struct dn_link *p = (struct dn_link *)oid;
 620             double b = p->bandwidth;
 621             char bwbuf[30];
 622             char burst[5 + 7];
 623
 624             /* This starts a new object so flush buffer */
 625             flush_buf(buf);
 626             /* data rate */
 627             if (b == 0)
 628                 sprintf(bwbuf, "unlimited     ");
 629             else if (b >= 1000000000)
 630                 sprintf(bwbuf, "%7.3f Gbit/s", b/1000000000);
 631             else if (b >= 1000000)
 632                 sprintf(bwbuf, "%7.3f Mbit/s", b/1000000);
 633             else if (b >= 1000)
 634                 sprintf(bwbuf, "%7.3f Kbit/s", b/1000);
 635             else
 636                 sprintf(bwbuf, "%7.3f bit/s ", b);
 637
 638             if (humanize_number(burst, sizeof(burst), p->burst,
 639                     "", HN_AUTOSCALE, 0) < 0 || g_co.verbose)
 640                 sprintf(burst, "%d", (int)p->burst);
 641             sprintf(buf, "%05d: %s %4d ms burst %s",
 642                 p->link_nr % DN_MAX_ID, bwbuf, p->delay, burst);
 643             }
 644             break;
 645
 646         case DN_FS:
 647             print_flowset_parms((struct dn_fs *)oid, buf);
 648             break;
 649         case DN_PROFILE:
 650             flush_buf(buf);
 651             print_extra_delay_parms((struct dn_profile *)oid);
 652         }
 653         flush_buf(buf); // XXX does it really go here ?
 654     }
 655
 656     bp_free(&bp);
 657 }
 658
 659 /*
 660  * Delete pipe, queue or scheduler i
 661  */
 662 int
 663 ipfw_delete_pipe(int do_pipe, int i)
 664 {
 665         struct {
 666                 struct dn_id oid;
 667                 uintptr_t a[1]; /* add more if we want a list */
 668         } cmd;
 669         oid_fill((void *)&cmd, sizeof(cmd), DN_CMD_DELETE, DN_API_VERSION);
 670         cmd.oid.subtype = (do_pipe == 1) ? DN_LINK :
 671                 ( (do_pipe == 2) ? DN_FS : DN_SCH);
 672         cmd.a[0] = i;
 673         i = do_cmd(IP_DUMMYNET3, &cmd, cmd.oid.len);
 674         if (i) {
 675                 i = 1;
 676                 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", i);
 677         }
 678         return i;
 679 }
 680
 681 /*
 682  * Code to parse delay profiles.
 683  *
 684  * Some link types introduce extra delays in the transmission
 685  * of a packet, e.g. because of MAC level framing, contention on
 686  * the use of the channel, MAC level retransmissions and so on.
 687  * From our point of view, the channel is effectively unavailable
 688  * for this extra time, which is constant or variable depending
 689  * on the link type. Additionally, packets may be dropped after this
 690  * time (e.g. on a wireless link after too many retransmissions).
 691  * We can model the additional delay with an empirical curve
 692  * that represents its distribution.
 693  *
 694  *      cumulative probability
 695  *      1.0 ^
 696  *          |
 697  *      L   +-- loss-level          x
 698  *          |                 ******
 699  *          |                *
 700  *          |           *****
 701  *          |          *
 702  *          |        **
 703  *          |       *
 704  *          +-------*------------------->
 705  *                      delay
 706  *
 707  * The empirical curve may have both vertical and horizontal lines.
 708  * Vertical lines represent constant delay for a range of
 709  * probabilities; horizontal lines correspond to a discontinuty
 710  * in the delay distribution: the link will use the largest delay
 711  * for a given probability.
 712  *
 713  * To pass the curve to dummynet, we must store the parameters
 714  * in a file as described below, and issue the command
 715  *
 716  *      ipfw pipe <n> config ... bw XXX profile <filename> ...
 717  *
 718  * The file format is the following, with whitespace acting as
 719  * a separator and '#' indicating the beginning a comment:
 720  *
 721  *      samples N
 722  *              the number of samples used in the internal
 723  *              representation (2..1024; default 100);
 724  *
 725  *      loss-level L
 726  *              The probability above which packets are lost.
 727  *             (0.0 <= L <= 1.0, default 1.0 i.e. no loss);
 728  *
 729  *      name identifier
 730  *              Optional a name (listed by "ipfw pipe show")
 731  *              to identify the distribution;
 732  *
 733  *      "delay prob" | "prob delay"
 734  *              One of these two lines is mandatory and defines
 735  *              the format of the following lines with data points.
 736  *
 737  *      XXX YYY
 738  *              2 or more lines representing points in the curve,
 739  *              with either delay or probability first, according
 740  *              to the chosen format.
 741  *              The unit for delay is milliseconds.
 742  *
 743  * Data points does not need to be ordered or equal to the number
 744  * specified in the "samples" line. ipfw will sort and interpolate
 745  * the curve as needed.
 746  *
 747  * Example of a profile file:
 748
 749         name    bla_bla_bla
 750         samples 100
 751         loss-level    0.86
 752         prob    delay
 753         0       200     # minimum overhead is 200ms
 754         0.5     200
 755         0.5     300
 756         0.8     1000
 757         0.9     1300
 758         1       1300
 759
 760  * Internally, we will convert the curve to a fixed number of
 761  * samples, and when it is time to transmit a packet we will
 762  * model the extra delay as extra bits in the packet.
 763  *
 764  */
 765
 766 #define ED_MAX_LINE_LEN 256+ED_MAX_NAME_LEN
 767 #define ED_TOK_SAMPLES  "samples"
 768 #define ED_TOK_LOSS     "loss-level"
 769 #define ED_TOK_NAME     "name"
 770 #define ED_TOK_DELAY    "delay"
 771 #define ED_TOK_PROB     "prob"
 772 #define ED_TOK_BW       "bw"
 773 #define ED_SEPARATORS   " \t\n"
 774 #define ED_MIN_SAMPLES_NO       2
 775
 776 /*
 777  * returns 1 if s is a non-negative number, with at least one '.'
 778  */
 779 static int
 780 is_valid_number(const char *s)
 781 {
 782         int i, dots_found = 0;
 783         int len = strlen(s);
 784
 785         for (i = 0; i<len; ++i)
 786                 if (!isdigit(s[i]) && (s[i] !='.' || ++dots_found > 1))
 787                         return 0;
 788         return 1;
 789 }
 790
 791 /*
 792  * Take as input a string describing a bandwidth value
 793  * and return the numeric bandwidth value.
 794  * set clocking interface or bandwidth value
 795  */
 796 static void
 797 read_bandwidth(char *arg, int *bandwidth, char *if_name, int namelen)
 798 {
 799         if (*bandwidth != -1)
 800                 warnx("duplicate token, override bandwidth value!");
 801
 802         if (arg[0] >= 'a' && arg[0] <= 'z') {
 803                 if (!if_name) {
 804                         errx(1, "no if support");
 805                 }
 806                 if (namelen >= IFNAMSIZ)
 807                         warn("interface name truncated");
 808                 namelen--;
 809                 /* interface name */
 810                 strlcpy(if_name, arg, namelen);
 811                 *bandwidth = 0;
 812         } else {        /* read bandwidth value */
 813                 int bw;
 814                 char *end = NULL;
 815
 816                 bw = strtoul(arg, &end, 0);
 817                 if (*end == 'K' || *end == 'k') {
 818                         end++;
 819                         bw *= 1000;
 820                 } else if (*end == 'M' || *end == 'm') {
 821                         end++;
 822                         bw *= 1000000;
 823                 } else if (*end == 'G' || *end == 'g') {
 824                         end++;
 825                         bw *= 1000000000;
 826                 }
 827                 if ((*end == 'B' &&
 828                         _substrcmp2(end, "Bi", "Bit/s") != 0) ||
 829                     _substrcmp2(end, "by", "bytes") == 0)
 830                         bw *= 8;
 831
 832                 if (bw < 0)
 833                         errx(EX_DATAERR, "bandwidth too large");
 834
 835                 *bandwidth = bw;
 836                 if (if_name)
 837                         if_name[0] = '\0';
 838         }
 839 }
 840
 841 struct point {
 842         double prob;
 843         double delay;
 844 };
 845
 846 static int
 847 compare_points(const void *vp1, const void *vp2)
 848 {
 849         const struct point *p1 = vp1;
 850         const struct point *p2 = vp2;
 851         double res = 0;
 852
 853         res = p1->prob - p2->prob;
 854         if (res == 0)
 855                 res = p1->delay - p2->delay;
 856         if (res < 0)
 857                 return -1;
 858         else if (res > 0)
 859                 return 1;
 860         else
 861                 return 0;
 862 }
 863
 864 #define ED_EFMT(s) EX_DATAERR,"error in %s at line %d: "#s,filename,lineno
 865
 866 static void
 867 load_extra_delays(const char *filename, struct dn_profile *p,
 868         struct dn_link *link)
 869 {
 870         char    line[ED_MAX_LINE_LEN];
 871         FILE    *f;
 872         int     lineno = 0;
 873         int     i;
 874
 875         int     samples = -1;
 876         double  loss = -1.0;
 877         char    profile_name[ED_MAX_NAME_LEN];
 878         int     delay_first = -1;
 879         int     do_points = 0;
 880         struct point    points[ED_MAX_SAMPLES_NO];
 881         int     points_no = 0;
 882
 883         /* XXX link never NULL? */
 884         p->link_nr = link->link_nr;
 885
 886         profile_name[0] = '\0';
 887         f = fopen(filename, "r");
 888         if (f == NULL)
 889                 err(EX_UNAVAILABLE, "fopen: %s", filename);
 890
 891         while (fgets(line, ED_MAX_LINE_LEN, f)) {        /* read commands */
 892                 char *s, *cur = line, *name = NULL, *arg = NULL;
 893
 894                 ++lineno;
 895
 896                 /* parse the line */
 897                 while (cur) {
 898                         s = strsep(&cur, ED_SEPARATORS);
 899                         if (s == NULL || *s == '#')
 900                                 break;
 901                         if (*s == '\0')
 902                                 continue;
 903                         if (arg)
 904                                 errx(ED_EFMT("too many arguments"));
 905                         if (name == NULL)
 906                                 name = s;
 907                         else
 908                                 arg = s;
 909                 }
 910                 if (name == NULL)       /* empty line */
 911                         continue;
 912                 if (arg == NULL)
 913                         errx(ED_EFMT("missing arg for %s"), name);
 914
 915                 if (!strcasecmp(name, ED_TOK_SAMPLES)) {
 916                     if (samples > 0)
 917                         errx(ED_EFMT("duplicate ``samples'' line"));
 918                     if (atoi(arg) <=0)
 919                         errx(ED_EFMT("invalid number of samples"));
 920                     samples = atoi(arg);
 921                     if (samples>ED_MAX_SAMPLES_NO)
 922                             errx(ED_EFMT("too many samples, maximum is %d"),
 923                                 ED_MAX_SAMPLES_NO);
 924                     do_points = 0;
 925                 } else if (!strcasecmp(name, ED_TOK_BW)) {
 926                     char buf[IFNAMSIZ];
 927                     read_bandwidth(arg, &link->bandwidth, buf, sizeof(buf));
 928                 } else if (!strcasecmp(name, ED_TOK_LOSS)) {
 929                     if (loss != -1.0)
 930                         errx(ED_EFMT("duplicated token: %s"), name);
 931                     if (!is_valid_number(arg))
 932                         errx(ED_EFMT("invalid %s"), arg);
 933                     loss = atof(arg);
 934                     if (loss > 1)
 935                         errx(ED_EFMT("%s greater than 1.0"), name);
 936                     do_points = 0;
 937                 } else if (!strcasecmp(name, ED_TOK_NAME)) {
 938                     if (profile_name[0] != '\0')
 939                         errx(ED_EFMT("duplicated token: %s"), name);
 940                     strlcpy(profile_name, arg, sizeof(profile_name));
 941                     do_points = 0;
 942                 } else if (!strcasecmp(name, ED_TOK_DELAY)) {
 943                     if (do_points)
 944                         errx(ED_EFMT("duplicated token: %s"), name);
 945                     delay_first = 1;
 946                     do_points = 1;
 947                 } else if (!strcasecmp(name, ED_TOK_PROB)) {
 948                     if (do_points)
 949                         errx(ED_EFMT("duplicated token: %s"), name);
 950                     delay_first = 0;
 951                     do_points = 1;
 952                 } else if (do_points) {
 953                     if (!is_valid_number(name) || !is_valid_number(arg))
 954                         errx(ED_EFMT("invalid point found"));
 955                     if (delay_first) {
 956                         points[points_no].delay = atof(name);
 957                         points[points_no].prob = atof(arg);
 958                     } else {
 959                         points[points_no].delay = atof(arg);
 960                         points[points_no].prob = atof(name);
 961                     }
 962                     if (points[points_no].prob > 1.0)
 963                         errx(ED_EFMT("probability greater than 1.0"));
 964                     ++points_no;
 965                 } else {
 966                     errx(ED_EFMT("unrecognised command '%s'"), name);
 967                 }
 968         }
 969
 970         fclose (f);
 971
 972         if (samples == -1) {
 973             warnx("'%s' not found, assuming 100", ED_TOK_SAMPLES);
 974             samples = 100;
 975         }
 976
 977         if (loss == -1.0) {
 978             warnx("'%s' not found, assuming no loss", ED_TOK_LOSS);
 979             loss = 1;
 980         }
 981
 982         /* make sure that there are enough points. */
 983         if (points_no < ED_MIN_SAMPLES_NO)
 984             errx(ED_EFMT("too few samples, need at least %d"),
 985                 ED_MIN_SAMPLES_NO);
 986
 987         qsort(points, points_no, sizeof(struct point), compare_points);
 988
 989         /* interpolation */
 990         for (i = 0; i<points_no-1; ++i) {
 991             double y1 = points[i].prob * samples;
 992             double x1 = points[i].delay;
 993             double y2 = points[i+1].prob * samples;
 994             double x2 = points[i+1].delay;
 995
 996             int ix = y1;
 997             int stop = y2;
 998
 999             if (x1 == x2) {
1000                 for (; ix<stop; ++ix)
1001                     p->samples[ix] = x1;
1002             } else {
1003                 double m = (y2-y1)/(x2-x1);
1004                 double c = y1 - m*x1;
1005                 for (; ix<stop ; ++ix)
1006                     p->samples[ix] = (ix - c)/m;
1007             }
1008         }
1009         p->samples_no = samples;
1010         p->loss_level = loss * samples;
1011         strlcpy(p->name, profile_name, sizeof(p->name));
1012 }
1013
1014 #ifdef NEW_AQM
1015
1016 /* Parse AQM/extra scheduler parameters */
1017 static int
1018 process_extra_parms(int *ac, char **av, struct dn_extra_parms *ep,
1019         uint16_t type)
1020 {
1021         int i;
1022
1023         /* use kernel defaults */
1024         for (i=0; i<DN_MAX_EXTRA_PARM; i++)
1025                 ep->par[i] = -1;
1026
1027         switch(type) {
1028         case TOK_CODEL:
1029         case TOK_FQ_CODEL:
1030         /* Codel
1031          * 0- target, 1- interval, 2- flags,
1032          * FQ_CODEL
1033          * 3- quantum, 4- limit, 5- flows
1034          */
1035                 if (type==TOK_CODEL)
1036                         ep->par[2] = 0;
1037                 else
1038                         ep->par[2] = CODEL_ECN_ENABLED;
1039
1040                 while (*ac > 0) {
1041                         int tok = match_token(aqm_params, *av);
1042                         (*ac)--; av++;
1043                         switch(tok) {
1044                         case TOK_TARGET:
1045                                 if (*ac <= 0 || time_to_us(av[0]) < 0)
1046                                         errx(EX_DATAERR, "target needs time\n");
1047
1048                                 ep->par[0] = time_to_us(av[0]);
1049                                 (*ac)--; av++;
1050                                 break;
1051
1052                         case TOK_INTERVAL:
1053                                 if (*ac <= 0 || time_to_us(av[0]) < 0)
1054                                         errx(EX_DATAERR, "interval needs time\n");
1055
1056                                 ep->par[1] = time_to_us(av[0]);
1057                                 (*ac)--; av++;
1058                                 break;
1059
1060                         case TOK_ECN:
1061                                 ep->par[2] = CODEL_ECN_ENABLED;
1062                                 break;
1063                         case TOK_NO_ECN:
1064                                 ep->par[2] &= ~CODEL_ECN_ENABLED;
1065                                 break;
1066                         /* Config fq_codel parameters */
1067                         case TOK_QUANTUM:
1068                                 if (type != TOK_FQ_CODEL)
1069                                         errx(EX_DATAERR, "quantum is not for codel\n");
1070                                 if (*ac <= 0 || !is_valid_number(av[0]))
1071                                         errx(EX_DATAERR, "quantum needs number\n");
1072
1073                                 ep->par[3]= atoi(av[0]);
1074                                 (*ac)--; av++;
1075                                 break;
1076
1077                         case TOK_LIMIT:
1078                                 if (type != TOK_FQ_CODEL)
1079                                         errx(EX_DATAERR, "limit is not for codel, use queue instead\n");
1080                                 if (*ac <= 0 || !is_valid_number(av[0]))
1081                                         errx(EX_DATAERR, "limit needs number\n");
1082
1083                                 ep->par[4] = atoi(av[0]);
1084                                 (*ac)--; av++;
1085                                 break;
1086
1087                         case TOK_FLOWS:
1088                                 if (type != TOK_FQ_CODEL)
1089                                         errx(EX_DATAERR, "flows is not for codel\n");
1090                                 if (*ac <= 0 || !is_valid_number(av[0]))
1091                                         errx(EX_DATAERR, "flows needs number\n");
1092
1093                                 ep->par[5] = atoi(av[0]);
1094                                 (*ac)--; av++;
1095                                 break;
1096
1097                         default:
1098                                 printf("%s is Invalid parameter\n", av[-1]);
1099                         }
1100                 }
1101                 break;
1102         case TOK_PIE:
1103         case TOK_FQ_PIE:
1104                 /* PIE
1105                  * 0- target , 1- tupdate, 2- max_burst,
1106                  * 3- max_ecnth, 4- alpha,
1107                  * 5- beta, 6- flags
1108                  * FQ_CODEL
1109                  * 7- quantum, 8- limit, 9- flows
1110                  */
1111
1112                 if ( type == TOK_PIE)
1113                         ep->par[6] = PIE_CAPDROP_ENABLED | PIE_DEPRATEEST_ENABLED
1114                                 | PIE_DERAND_ENABLED;
1115                 else
1116                         /* for FQ-PIE, use TS mode */
1117                         ep->par[6] = PIE_CAPDROP_ENABLED |  PIE_DERAND_ENABLED
1118                                 | PIE_ECN_ENABLED;
1119
1120                 while (*ac > 0) {
1121                         int tok = match_token(aqm_params, *av);
1122                         (*ac)--; av++;
1123                         switch(tok) {
1124                         case TOK_TARGET:
1125                                 if (*ac <= 0 || time_to_us(av[0]) < 0)
1126                                         errx(EX_DATAERR, "target needs time\n");
1127
1128                                 ep->par[0] = time_to_us(av[0]);
1129                                 (*ac)--; av++;
1130                                 break;
1131
1132                         case TOK_TUPDATE:
1133                                 if (*ac <= 0 || time_to_us(av[0]) < 0)
1134                                         errx(EX_DATAERR, "tupdate needs time\n");
1135
1136                                 ep->par[1] = time_to_us(av[0]);
1137                                 (*ac)--; av++;
1138                                 break;
1139
1140                         case TOK_MAX_BURST:
1141                                 if (*ac <= 0 || time_to_us(av[0]) < 0)
1142                                         errx(EX_DATAERR, "max_burst needs time\n");
1143
1144                                 ep->par[2] = time_to_us(av[0]);
1145                                 (*ac)--; av++;
1146                                 break;
1147
1148                         case TOK_MAX_ECNTH:
1149                                 if (*ac <= 0 || !is_valid_number(av[0]))
1150                                         errx(EX_DATAERR, "max_ecnth needs number\n");
1151
1152                                 ep->par[3] = atof(av[0]) * PIE_SCALE;
1153                                 (*ac)--; av++;
1154                                 break;
1155
1156                         case TOK_ALPHA:
1157                                 if (*ac <= 0 || !is_valid_number(av[0]))
1158                                         errx(EX_DATAERR, "alpha needs number\n");
1159
1160                                 ep->par[4] = atof(av[0]) * PIE_SCALE;
1161                                 (*ac)--; av++;
1162                                 break;
1163
1164                         case TOK_BETA:
1165                                 if (*ac <= 0 || !is_valid_number(av[0]))
1166                                         errx(EX_DATAERR, "beta needs number\n");
1167
1168                                 ep->par[5] = atof(av[0]) * PIE_SCALE;
1169                                 (*ac)--; av++;
1170                                 break;
1171
1172                         case TOK_ECN:
1173                                 ep->par[6] |= PIE_ECN_ENABLED;
1174                                 break;
1175                         case TOK_NO_ECN:
1176                                 ep->par[6] &= ~PIE_ECN_ENABLED;
1177                                 break;
1178
1179                         case TOK_CAPDROP:
1180                                 ep->par[6] |= PIE_CAPDROP_ENABLED;
1181                                 break;
1182                         case TOK_NO_CAPDROP:
1183                                 ep->par[6] &= ~PIE_CAPDROP_ENABLED;
1184                                 break;
1185
1186                         case TOK_ONOFF:
1187                                 ep->par[6] |= PIE_ON_OFF_MODE_ENABLED;
1188                                 break;
1189
1190                         case TOK_DRE:
1191                                 ep->par[6] |= PIE_DEPRATEEST_ENABLED;
1192                                 break;
1193
1194                         case TOK_TS:
1195                                 ep->par[6] &= ~PIE_DEPRATEEST_ENABLED;
1196                                 break;
1197
1198                         case TOK_DERAND:
1199                                 ep->par[6] |= PIE_DERAND_ENABLED;
1200                                 break;
1201                         case TOK_NO_DERAND:
1202                                 ep->par[6] &= ~PIE_DERAND_ENABLED;
1203                                 break;
1204
1205                         /* Config fq_pie parameters */
1206                         case TOK_QUANTUM:
1207                                 if (type != TOK_FQ_PIE)
1208                                         errx(EX_DATAERR, "quantum is not for pie\n");
1209                                 if (*ac <= 0 || !is_valid_number(av[0]))
1210                                         errx(EX_DATAERR, "quantum needs number\n");
1211
1212                                 ep->par[7]= atoi(av[0]);
1213                                 (*ac)--; av++;
1214                                 break;
1215
1216                         case TOK_LIMIT:
1217                                 if (type != TOK_FQ_PIE)
1218                                         errx(EX_DATAERR, "limit is not for pie, use queue instead\n");
1219                                 if (*ac <= 0 || !is_valid_number(av[0]))
1220                                         errx(EX_DATAERR, "limit needs number\n");
1221
1222                                 ep->par[8] = atoi(av[0]);
1223                                 (*ac)--; av++;
1224                                 break;
1225
1226                         case TOK_FLOWS:
1227                                 if (type != TOK_FQ_PIE)
1228                                         errx(EX_DATAERR, "flows is not for pie\n");
1229                                 if (*ac <= 0 || !is_valid_number(av[0]))
1230                                         errx(EX_DATAERR, "flows needs number\n");
1231
1232                                 ep->par[9] = atoi(av[0]);
1233                                 (*ac)--; av++;
1234                                 break;
1235
1236
1237                         default:
1238                                 printf("%s is invalid parameter\n", av[-1]);
1239                         }
1240                 }
1241                 break;
1242         }
1243
1244         return 0;
1245 }
1246
1247 #endif
1248
1249
1250 /*
1251  * configuration of pipes, schedulers, flowsets.
1252  * When we configure a new scheduler, an empty pipe is created, so:
1253  *
1254  * do_pipe = 1 -> "pipe N config ..." only for backward compatibility
1255  *      sched N+Delta type fifo sched_mask ...
1256  *      pipe N+Delta <parameters>
1257  *      flowset N+Delta pipe N+Delta (no parameters)
1258  *      sched N type wf2q+ sched_mask ...
1259  *      pipe N <parameters>
1260  *
1261  * do_pipe = 2 -> flowset N config
1262  *      flowset N parameters
1263  *
1264  * do_pipe = 3 -> sched N config
1265  *      sched N parameters (default no pipe)
1266  *      optional Pipe N config ...
1267  * pipe ==>
1268  */
1269 void
1270 ipfw_config_pipe(int ac, char **av)
1271 {
1272         int i;
1273         u_int j;
1274         char *end;
1275         struct dn_id *buf, *base;
1276         struct dn_sch *sch = NULL;
1277         struct dn_link *p = NULL;
1278         struct dn_fs *fs = NULL;
1279         struct dn_profile *pf = NULL;
1280         struct ipfw_flow_id *mask = NULL;
1281 #ifdef NEW_AQM
1282         struct dn_extra_parms *aqm_extra = NULL;
1283         struct dn_extra_parms *sch_extra = NULL;
1284         int lmax_extra;
1285 #endif
1286
1287         int lmax;
1288         uint32_t _foo = 0, *flags = &_foo , *buckets = &_foo;
1289
1290         /*
1291          * allocate space for 1 header,
1292          * 1 scheduler, 1 link, 1 flowset, 1 profile
1293          */
1294         lmax = sizeof(struct dn_id);    /* command header */
1295         lmax += sizeof(struct dn_sch) + sizeof(struct dn_link) +
1296                 sizeof(struct dn_fs) + sizeof(struct dn_profile);
1297
1298 #ifdef NEW_AQM
1299         /* Extra Params */
1300         lmax_extra = sizeof(struct dn_extra_parms);
1301         /* two lmax_extra because one for AQM params and another
1302          * sch params
1303          */
1304         lmax += lmax_extra*2;
1305 #endif
1306
1307         av++; ac--;
1308         /* Pipe number */
1309         if (ac && isdigit(**av)) {
1310                 i = atoi(*av); av++; ac--;
1311         } else
1312                 i = -1;
1313         if (i <= 0)
1314                 errx(EX_USAGE, "need a pipe/flowset/sched number");
1315         base = buf = safe_calloc(1, lmax);
1316         /* all commands start with a 'CONFIGURE' and a version */
1317         o_next(&buf, sizeof(struct dn_id), DN_CMD_CONFIG);
1318         base->id = DN_API_VERSION;
1319
1320         switch (g_co.do_pipe) {
1321         case 1: /* "pipe N config ..." */
1322                 /* Allocate space for the WF2Q+ scheduler, its link
1323                  * and the FIFO flowset. Set the number, but leave
1324                  * the scheduler subtype and other parameters to 0
1325                  * so the kernel will use appropriate defaults.
1326                  * XXX todo: add a flag to record if a parameter
1327                  * is actually configured.
1328                  * If we do a 'pipe config' mask -> sched_mask.
1329                  * The FIFO scheduler and link are derived from the
1330                  * WF2Q+ one in the kernel.
1331                  */
1332 #ifdef NEW_AQM
1333                 sch_extra = o_next(&buf, lmax_extra, DN_TEXT);
1334                 sch_extra ->oid.subtype = 0; /* don't configure scheduler */
1335 #endif
1336                 sch = o_next(&buf, sizeof(*sch), DN_SCH);
1337                 p = o_next(&buf, sizeof(*p), DN_LINK);
1338 #ifdef NEW_AQM
1339                 aqm_extra = o_next(&buf, lmax_extra, DN_TEXT);
1340                 aqm_extra ->oid.subtype = 0; /* don't configure AQM */
1341 #endif
1342                 fs = o_next(&buf, sizeof(*fs), DN_FS);
1343
1344                 sch->sched_nr = i;
1345                 sch->oid.subtype = 0;   /* defaults to WF2Q+ */
1346                 mask = &sch->sched_mask;
1347                 flags = &sch->flags;
1348                 buckets = &sch->buckets;
1349                 *flags |= DN_PIPE_CMD;
1350
1351                 p->link_nr = i;
1352
1353                 /* This flowset is only for the FIFO scheduler */
1354                 fs->fs_nr = i + 2*DN_MAX_ID;
1355                 fs->sched_nr = i + DN_MAX_ID;
1356                 break;
1357
1358         case 2: /* "queue N config ... " */
1359 #ifdef NEW_AQM
1360                 aqm_extra = o_next(&buf, lmax_extra, DN_TEXT);
1361                 aqm_extra ->oid.subtype = 0;
1362 #endif
1363                 fs = o_next(&buf, sizeof(*fs), DN_FS);
1364                 fs->fs_nr = i;
1365                 mask = &fs->flow_mask;
1366                 flags = &fs->flags;
1367                 buckets = &fs->buckets;
1368                 break;
1369
1370         case 3: /* "sched N config ..." */
1371 #ifdef NEW_AQM
1372                 sch_extra = o_next(&buf, lmax_extra, DN_TEXT);
1373                 sch_extra ->oid.subtype = 0;
1374 #endif
1375                 sch = o_next(&buf, sizeof(*sch), DN_SCH);
1376 #ifdef NEW_AQM
1377                 aqm_extra = o_next(&buf, lmax_extra, DN_TEXT);
1378                 aqm_extra ->oid.subtype = 0;
1379 #endif
1380                 fs = o_next(&buf, sizeof(*fs), DN_FS);
1381                 sch->sched_nr = i;
1382                 mask = &sch->sched_mask;
1383                 flags = &sch->flags;
1384                 buckets = &sch->buckets;
1385                 /* fs is used only with !MULTIQUEUE schedulers */
1386                 fs->fs_nr = i + DN_MAX_ID;
1387                 fs->sched_nr = i;
1388                 break;
1389         }
1390         /* set to -1 those fields for which we want to reuse existing
1391          * values from the kernel.
1392          * Also, *_nr and subtype = 0 mean reuse the value from the kernel.
1393          * XXX todo: support reuse of the mask.
1394          */
1395         if (p)
1396                 p->bandwidth = -1;
1397         for (j = 0; j < sizeof(fs->par)/sizeof(fs->par[0]); j++)
1398                 fs->par[j] = -1;
1399         while (ac > 0) {
1400                 double d;
1401                 int tok = match_token(dummynet_params, *av);
1402                 ac--; av++;
1403
1404                 switch(tok) {
1405                 case TOK_NOERROR:
1406                         NEED(fs, "noerror is only for pipes");
1407                         fs->flags |= DN_NOERROR;
1408                         break;
1409
1410                 case TOK_PLR:
1411                         NEED(fs, "plr is only for pipes");
1412                         NEED1("plr needs argument 0..1\n");
1413                         d = strtod(av[0], NULL);
1414                         if (d > 1)
1415                                 d = 1;
1416                         else if (d < 0)
1417                                 d = 0;
1418                         fs->plr = (int)(d*0x7fffffff);
1419                         ac--; av++;
1420                         break;
1421
1422                 case TOK_QUEUE:
1423                         NEED(fs, "queue is only for pipes or flowsets");
1424                         NEED1("queue needs queue size\n");
1425                         end = NULL;
1426                         fs->qsize = strtoul(av[0], &end, 0);
1427                         if (*end == 'K' || *end == 'k') {
1428                                 fs->flags |= DN_QSIZE_BYTES;
1429                                 fs->qsize *= 1024;
1430                         } else if (*end == 'B' ||
1431                             _substrcmp2(end, "by", "bytes") == 0) {
1432                                 fs->flags |= DN_QSIZE_BYTES;
1433                         }
1434                         ac--; av++;
1435                         break;
1436
1437                 case TOK_BUCKETS:
1438                         NEED(fs, "buckets is only for pipes or flowsets");
1439                         NEED1("buckets needs argument\n");
1440                         *buckets = strtoul(av[0], NULL, 0);
1441                         ac--; av++;
1442                         break;
1443
1444                 case TOK_FLOW_MASK:
1445                 case TOK_SCHED_MASK:
1446                 case TOK_MASK:
1447                         NEED(mask, "tok_mask");
1448                         NEED1("mask needs mask specifier\n");
1449                         /*
1450                          * per-flow queue, mask is dst_ip, dst_port,
1451                          * src_ip, src_port, proto measured in bits
1452                          */
1453
1454                         bzero(mask, sizeof(*mask));
1455                         end = NULL;
1456
1457                         while (ac >= 1) {
1458                             uint32_t *p32 = NULL;
1459                             uint16_t *p16 = NULL;
1460                             uint32_t *p20 = NULL;
1461                             struct in6_addr *pa6 = NULL;
1462                             uint32_t a;
1463
1464                             tok = match_token(dummynet_params, *av);
1465                             ac--; av++;
1466                             switch(tok) {
1467                             case TOK_ALL:
1468                                     /*
1469                                      * special case, all bits significant
1470                                      * except 'extra' (the queue number)
1471                                      */
1472                                     mask->dst_ip = ~0;
1473                                     mask->src_ip = ~0;
1474                                     mask->dst_port = ~0;
1475                                     mask->src_port = ~0;
1476                                     mask->proto = ~0;
1477                                     n2mask(&mask->dst_ip6, 128);
1478                                     n2mask(&mask->src_ip6, 128);
1479                                     mask->flow_id6 = ~0;
1480                                     *flags |= DN_HAVE_MASK;
1481                                     goto end_mask;
1482
1483                             case TOK_QUEUE:
1484                                     mask->extra = ~0;
1485                                     *flags |= DN_HAVE_MASK;
1486                                     goto end_mask;
1487
1488                             case TOK_DSTIP:
1489                                     mask->addr_type = 4;
1490                                     p32 = &mask->dst_ip;
1491                                     break;
1492
1493                             case TOK_SRCIP:
1494                                     mask->addr_type = 4;
1495                                     p32 = &mask->src_ip;
1496                                     break;
1497
1498                             case TOK_DSTIP6:
1499                                     mask->addr_type = 6;
1500                                     pa6 = &mask->dst_ip6;
1501                                     break;
1502
1503                             case TOK_SRCIP6:
1504                                     mask->addr_type = 6;
1505                                     pa6 = &mask->src_ip6;
1506                                     break;
1507
1508                             case TOK_FLOWID:
1509                                     mask->addr_type = 6;
1510                                     p20 = &mask->flow_id6;
1511                                     break;
1512
1513                             case TOK_DSTPORT:
1514                                     p16 = &mask->dst_port;
1515                                     break;
1516
1517                             case TOK_SRCPORT:
1518                                     p16 = &mask->src_port;
1519                                     break;
1520
1521                             case TOK_PROTO:
1522                                     break;
1523
1524                             default:
1525                                     ac++; av--; /* backtrack */
1526                                     goto end_mask;
1527                             }
1528                             if (ac < 1)
1529                                     errx(EX_USAGE, "mask: value missing");
1530                             if (*av[0] == '/') {
1531                                     a = strtoul(av[0]+1, &end, 0);
1532                                     if (pa6 == NULL)
1533                                             a = (a == 32) ? ~0 : (1 << a) - 1;
1534                             } else
1535                                     a = strtoul(av[0], &end, 0);
1536                             if (p32 != NULL)
1537                                     *p32 = a;
1538                             else if (p16 != NULL) {
1539                                     if (a > 0xFFFF)
1540                                             errx(EX_DATAERR,
1541                                                 "port mask must be 16 bit");
1542                                     *p16 = (uint16_t)a;
1543                             } else if (p20 != NULL) {
1544                                     if (a > 0xfffff)
1545                                         errx(EX_DATAERR,
1546                                             "flow_id mask must be 20 bit");
1547                                     *p20 = (uint32_t)a;
1548                             } else if (pa6 != NULL) {
1549                                     if (a > 128)
1550                                         errx(EX_DATAERR,
1551                                             "in6addr invalid mask len");
1552                                     else
1553                                         n2mask(pa6, a);
1554                             } else {
1555                                     if (a > 0xFF)
1556                                             errx(EX_DATAERR,
1557                                                 "proto mask must be 8 bit");
1558                                     mask->proto = (uint8_t)a;
1559                             }
1560                             if (a != 0)
1561                                     *flags |= DN_HAVE_MASK;
1562                             ac--; av++;
1563                         } /* end while, config masks */
1564 end_mask:
1565                         break;
1566 #ifdef NEW_AQM
1567                 case TOK_CODEL:
1568                 case TOK_PIE:
1569                         NEED(fs, "codel/pie is only for flowsets");
1570
1571                         fs->flags &= ~(DN_IS_RED|DN_IS_GENTLE_RED);
1572                         fs->flags |= DN_IS_AQM;
1573
1574                         strlcpy(aqm_extra->name, av[-1],
1575                             sizeof(aqm_extra->name));
1576                         aqm_extra->oid.subtype = DN_AQM_PARAMS;
1577
1578                         process_extra_parms(&ac, av, aqm_extra, tok);
1579                         break;
1580
1581                 case TOK_FQ_CODEL:
1582                 case TOK_FQ_PIE:
1583                         if (!strcmp(av[-1],"type"))
1584                                 errx(EX_DATAERR, "use type before fq_codel/fq_pie");
1585
1586                         NEED(sch, "fq_codel/fq_pie is only for schd");
1587                         strlcpy(sch_extra->name, av[-1],
1588                             sizeof(sch_extra->name));
1589                         sch_extra->oid.subtype = DN_SCH_PARAMS;
1590                         process_extra_parms(&ac, av, sch_extra, tok);
1591                         break;
1592 #endif
1593                 case TOK_RED:
1594                 case TOK_GRED:
1595                         NEED1("red/gred needs w_q/min_th/max_th/max_p\n");
1596                         fs->flags |= DN_IS_RED;
1597                         if (tok == TOK_GRED)
1598                                 fs->flags |= DN_IS_GENTLE_RED;
1599                         /*
1600                          * the format for parameters is w_q/min_th/max_th/max_p
1601                          */
1602                         if ((end = strsep(&av[0], "/"))) {
1603                             double w_q = strtod(end, NULL);
1604                             if (w_q > 1 || w_q <= 0)
1605                                 errx(EX_DATAERR, "0 < w_q <= 1");
1606                             fs->w_q = (int) (w_q * (1 << SCALE_RED));
1607                         }
1608                         if ((end = strsep(&av[0], "/"))) {
1609                             fs->min_th = strtoul(end, &end, 0);
1610                             if (*end == 'K' || *end == 'k')
1611                                 fs->min_th *= 1024;
1612                         }
1613                         if ((end = strsep(&av[0], "/"))) {
1614                             fs->max_th = strtoul(end, &end, 0);
1615                             if (*end == 'K' || *end == 'k')
1616                                 fs->max_th *= 1024;
1617                         }
1618                         if ((end = strsep(&av[0], "/"))) {
1619                             double max_p = strtod(end, NULL);
1620                             if (max_p > 1 || max_p < 0)
1621                                 errx(EX_DATAERR, "0 <= max_p <= 1");
1622                             fs->max_p = (int)(max_p * (1 << SCALE_RED));
1623                         }
1624                         ac--; av++;
1625                         break;
1626
1627                 case TOK_ECN:
1628                         fs->flags |= DN_IS_ECN;
1629                         break;
1630
1631                 case TOK_DROPTAIL:
1632                         NEED(fs, "droptail is only for flowsets");
1633                         fs->flags &= ~(DN_IS_RED|DN_IS_GENTLE_RED);
1634                         break;
1635
1636                 case TOK_BW:
1637                         NEED(p, "bw is only for links");
1638                         NEED1("bw needs bandwidth or interface\n");
1639                         read_bandwidth(av[0], &p->bandwidth, NULL, 0);
1640                         ac--; av++;
1641                         break;
1642
1643                 case TOK_DELAY:
1644                         NEED(p, "delay is only for links");
1645                         NEED1("delay needs argument 0..10000ms\n");
1646                         p->delay = strtoul(av[0], NULL, 0);
1647                         ac--; av++;
1648                         break;
1649
1650                 case TOK_TYPE: {
1651                         int l;
1652                         NEED(sch, "type is only for schedulers");
1653                         NEED1("type needs a string");
1654                         l = strlen(av[0]);
1655                         if (l == 0 || l > 15)
1656                                 errx(1, "type %s too long\n", av[0]);
1657                         strlcpy(sch->name, av[0], sizeof(sch->name));
1658                         sch->oid.subtype = 0; /* use string */
1659 #ifdef NEW_AQM
1660                         /* if fq_codel is selected, consider all tokens after it
1661                          * as parameters
1662                          */
1663                         if (!strcasecmp(av[0],"fq_codel") || !strcasecmp(av[0],"fq_pie")){
1664                                 strlcpy(sch_extra->name, av[0],
1665                                     sizeof(sch_extra->name));
1666                                 sch_extra->oid.subtype = DN_SCH_PARAMS;
1667                                 process_extra_parms(&ac, av, sch_extra, tok);
1668                         } else {
1669                                 ac--;av++;
1670                         }
1671 #else
1672                         ac--;av++;
1673 #endif
1674                         break;
1675                     }
1676
1677                 case TOK_WEIGHT:
1678                         NEED(fs, "weight is only for flowsets");
1679                         NEED1("weight needs argument\n");
1680                         fs->par[0] = strtol(av[0], &end, 0);
1681                         ac--; av++;
1682                         break;
1683
1684                 case TOK_LMAX:
1685                         NEED(fs, "lmax is only for flowsets");
1686                         NEED1("lmax needs argument\n");
1687                         fs->par[1] = strtol(av[0], &end, 0);
1688                         ac--; av++;
1689                         break;
1690
1691                 case TOK_PRI:
1692                         NEED(fs, "priority is only for flowsets");
1693                         NEED1("priority needs argument\n");
1694                         fs->par[2] = strtol(av[0], &end, 0);
1695                         ac--; av++;
1696                         break;
1697
1698                 case TOK_SCHED:
1699                 case TOK_PIPE:
1700                         NEED(fs, "pipe/sched");
1701                         NEED1("pipe/link/sched needs number\n");
1702                         fs->sched_nr = strtoul(av[0], &end, 0);
1703                         ac--; av++;
1704                         break;
1705
1706                 case TOK_PROFILE:
1707                         NEED((!pf), "profile already set");
1708                         NEED(p, "profile");
1709                     {
1710                         NEED1("extra delay needs the file name\n");
1711                         pf = o_next(&buf, sizeof(*pf), DN_PROFILE);
1712                         load_extra_delays(av[0], pf, p); //XXX can't fail?
1713                         --ac; ++av;
1714                     }
1715                         break;
1716
1717                 case TOK_BURST:
1718                         NEED(p, "burst");
1719                         NEED1("burst needs argument\n");
1720                         errno = 0;
1721                         if (expand_number(av[0], &p->burst) < 0)
1722                                 if (errno != ERANGE)
1723                                         errx(EX_DATAERR,
1724                                             "burst: invalid argument");
1725                         if (errno || p->burst > (1ULL << 48) - 1)
1726                                 errx(EX_DATAERR,
1727                                     "burst: out of range (0..2^48-1)");
1728                         ac--; av++;
1729                         break;
1730
1731                 default:
1732                         errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]);
1733                 }
1734         }
1735
1736         /* check validity of parameters */
1737         if (p) {
1738                 if (p->delay > 10000)
1739                         errx(EX_DATAERR, "delay must be < 10000");
1740                 if (p->bandwidth == -1)
1741                         p->bandwidth = 0;
1742         }
1743         if (fs) {
1744                 /* XXX accept a 0 scheduler to keep the default */
1745             if (fs->flags & DN_QSIZE_BYTES) {
1746                 size_t len;
1747                 long limit;
1748
1749                 len = sizeof(limit);
1750                 if (sysctlbyname("net.inet.ip.dummynet.pipe_byte_limit",
1751                         &limit, &len, NULL, 0) == -1)
1752                         limit = 1024*1024;
1753                 if (fs->qsize > limit)
1754                         errx(EX_DATAERR, "queue size must be < %ldB", limit);
1755             } else {
1756                 size_t len;
1757                 long limit;
1758
1759                 len = sizeof(limit);
1760                 if (sysctlbyname("net.inet.ip.dummynet.pipe_slot_limit",
1761                         &limit, &len, NULL, 0) == -1)
1762                         limit = 100;
1763                 if (fs->qsize > limit)
1764                         errx(EX_DATAERR, "2 <= queue size <= %ld", limit);
1765             }
1766
1767 #ifdef NEW_AQM
1768                 if ((fs->flags & DN_IS_ECN) && !((fs->flags & DN_IS_RED)||
1769                         (fs->flags & DN_IS_AQM)))
1770                         errx(EX_USAGE, "ECN can be used with red/gred/"
1771                                 "codel/fq_codel only!");
1772 #else
1773             if ((fs->flags & DN_IS_ECN) && !(fs->flags & DN_IS_RED))
1774                 errx(EX_USAGE, "enable red/gred for ECN");
1775
1776 #endif
1777
1778             if (fs->flags & DN_IS_RED) {
1779                 size_t len;
1780                 int lookup_depth, avg_pkt_size;
1781
1782                 if (!(fs->flags & DN_IS_ECN) && (fs->min_th >= fs->max_th))
1783                     errx(EX_DATAERR, "min_th %d must be < than max_th %d",
1784                         fs->min_th, fs->max_th);
1785                 else if ((fs->flags & DN_IS_ECN) && (fs->min_th > fs->max_th))
1786                     errx(EX_DATAERR, "min_th %d must be =< than max_th %d",
1787                         fs->min_th, fs->max_th);
1788
1789                 if (fs->max_th == 0)
1790                     errx(EX_DATAERR, "max_th must be > 0");
1791
1792                 len = sizeof(int);
1793                 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth",
1794                         &lookup_depth, &len, NULL, 0) == -1)
1795                         lookup_depth = 256;
1796                 if (lookup_depth == 0)
1797                     errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth"
1798                         " must be greater than zero");
1799
1800                 len = sizeof(int);
1801                 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size",
1802                         &avg_pkt_size, &len, NULL, 0) == -1)
1803                         avg_pkt_size = 512;
1804
1805                 if (avg_pkt_size == 0)
1806                         errx(EX_DATAERR,
1807                             "net.inet.ip.dummynet.red_avg_pkt_size must"
1808                             " be greater than zero");
1809
1810 #if 0 /* the following computation is now done in the kernel */
1811                 /*
1812                  * Ticks needed for sending a medium-sized packet.
1813                  * Unfortunately, when we are configuring a WF2Q+ queue, we
1814                  * do not have bandwidth information, because that is stored
1815                  * in the parent pipe, and also we have multiple queues
1816                  * competing for it. So we set s=0, which is not very
1817                  * correct. But on the other hand, why do we want RED with
1818                  * WF2Q+ ?
1819                  */
1820                 if (p.bandwidth==0) /* this is a WF2Q+ queue */
1821                         s = 0;
1822                 else
1823                         s = (double)ck.hz * avg_pkt_size * 8 / p.bandwidth;
1824                 /*
1825                  * max idle time (in ticks) before avg queue size becomes 0.
1826                  * NOTA:  (3/w_q) is approx the value x so that
1827                  * (1-w_q)^x < 10^-3.
1828                  */
1829                 w_q = ((double)fs->w_q) / (1 << SCALE_RED);
1830                 idle = s * 3. / w_q;
1831                 fs->lookup_step = (int)idle / lookup_depth;
1832                 if (!fs->lookup_step)
1833                         fs->lookup_step = 1;
1834                 weight = 1 - w_q;
1835                 for (t = fs->lookup_step; t > 1; --t)
1836                         weight *= 1 - w_q;
1837                 fs->lookup_weight = (int)(weight * (1 << SCALE_RED));
1838 #endif /* code moved in the kernel */
1839             }
1840         }
1841
1842         i = do_cmd(IP_DUMMYNET3, base, (char *)buf - (char *)base);
1843
1844         if (i)
1845                 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE");
1846 }
1847
1848 void
1849 dummynet_flush(void)
1850 {
1851         struct dn_id oid;
1852         oid_fill(&oid, sizeof(oid), DN_CMD_FLUSH, DN_API_VERSION);
1853         do_cmd(IP_DUMMYNET3, &oid, oid.len);
1854 }
1855
1856 /* Parse input for 'ipfw [pipe|sched|queue] show [range list]'
1857  * Returns the number of ranges, and possibly stores them
1858  * in the array v of size len.
1859  */
1860 static int
1861 parse_range(int ac, char *av[], uint32_t *v, int len)
1862 {
1863         int n = 0;
1864         char *endptr, *s;
1865         uint32_t base[2];
1866
1867         if (v == NULL || len < 2) {
1868                 v = base;
1869                 len = 2;
1870         }
1871
1872         for (s = *av; s != NULL; av++, ac--) {
1873                 v[0] = strtoul(s, &endptr, 10);
1874                 v[1] = (*endptr != '-') ? v[0] :
1875                          strtoul(endptr+1, &endptr, 10);
1876                 if (*endptr == '\0') { /* prepare for next round */
1877                         s = (ac > 0) ? *(av+1) : NULL;
1878                 } else {
1879                         if (*endptr != ',') {
1880                                 warn("invalid number: %s", s);
1881                                 s = ++endptr;
1882                                 continue;
1883                         }
1884                         /* continue processing from here */
1885                         s = ++endptr;
1886                         ac++;
1887                         av--;
1888                 }
1889                 if (v[1] < v[0] ||
1890                         v[0] >= DN_MAX_ID-1 ||
1891                         v[1] >= DN_MAX_ID-1) {
1892                         continue; /* invalid entry */
1893                 }
1894                 n++;
1895                 /* translate if 'pipe list' */
1896                 if (g_co.do_pipe == 1) {
1897                         v[0] += DN_MAX_ID;
1898                         v[1] += DN_MAX_ID;
1899                 }
1900                 v = (n*2 < len) ? v + 2 : base;
1901         }
1902         return n;
1903 }
1904
1905 /* main entry point for dummynet list functions. co.do_pipe indicates
1906  * which function we want to support.
1907  * av may contain filtering arguments, either individual entries
1908  * or ranges, or lists (space or commas are valid separators).
1909  * Format for a range can be n1-n2 or n3 n4 n5 ...
1910  * In a range n1 must be <= n2, otherwise the range is ignored.
1911  * A number 'n4' is translate in a range 'n4-n4'
1912  * All number must be > 0 and < DN_MAX_ID-1
1913  */
1914 void
1915 dummynet_list(int ac, char *av[], int show_counters)
1916 {
1917         struct dn_id *oid, *x = NULL;
1918         int ret, i;
1919         int n;          /* # of ranges */
1920         u_int buflen, l;
1921         u_int max_size; /* largest obj passed up */
1922
1923         (void)show_counters;    // XXX unused, but we should use it.
1924         ac--;
1925         av++;           /* skip 'list' | 'show' word */
1926
1927         n = parse_range(ac, av, NULL, 0);       /* Count # of ranges. */
1928
1929         /* Allocate space to store ranges */
1930         l = sizeof(*oid) + sizeof(uint32_t) * n * 2;
1931         oid = safe_calloc(1, l);
1932         oid_fill(oid, l, DN_CMD_GET, DN_API_VERSION);
1933
1934         if (n > 0)      /* store ranges in idx */
1935                 parse_range(ac, av, (uint32_t *)(oid + 1), n*2);
1936         /*
1937          * Compute the size of the largest object returned. If the
1938          * response leaves at least this much spare space in the
1939          * buffer, then surely the response is complete; otherwise
1940          * there might be a risk of truncation and we will need to
1941          * retry with a larger buffer.
1942          * XXX don't bother with smaller structs.
1943          */
1944         max_size = sizeof(struct dn_fs);
1945         if (max_size < sizeof(struct dn_sch))
1946                 max_size = sizeof(struct dn_sch);
1947         if (max_size < sizeof(struct dn_flow))
1948                 max_size = sizeof(struct dn_flow);
1949
1950         switch (g_co.do_pipe) {
1951         case 1:
1952                 oid->subtype = DN_LINK; /* list pipe */
1953                 break;
1954         case 2:
1955                 oid->subtype = DN_FS;   /* list queue */
1956                 break;
1957         case 3:
1958                 oid->subtype = DN_SCH;  /* list sched */
1959                 break;
1960         }
1961
1962         /*
1963          * Ask the kernel an estimate of the required space (result
1964          * in oid.id), unless we are requesting a subset of objects,
1965          * in which case the kernel does not give an exact answer.
1966          * In any case, space might grow in the meantime due to the
1967          * creation of new queues, so we must be prepared to retry.
1968          */
1969         if (n > 0) {
1970                 buflen = 4*1024;
1971         } else {
1972                 ret = do_cmd(-IP_DUMMYNET3, oid, (uintptr_t)&l);
1973                 if (ret != 0 || oid->id <= sizeof(*oid))
1974                         goto done;
1975                 buflen = oid->id + max_size;
1976                 oid->len = sizeof(*oid); /* restore */
1977         }
1978         /* Try a few times, until the buffer fits */
1979         for (i = 0; i < 20; i++) {
1980                 l = buflen;
1981                 x = safe_realloc(x, l);
1982                 bcopy(oid, x, oid->len);
1983                 ret = do_cmd(-IP_DUMMYNET3, x, (uintptr_t)&l);
1984                 if (ret != 0 || x->id <= sizeof(*oid))
1985                         goto done; /* no response */
1986                 if (l + max_size <= buflen)
1987                         break; /* ok */
1988                 buflen *= 2;     /* double for next attempt */
1989         }
1990         list_pipes(x, O_NEXT(x, l));
1991 done:
1992         if (x)
1993                 free(x);
1994         free(oid);
1995 }