/* * Copyright (c) 2002-2003 Luigi Rizzo * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp * Copyright (c) 1994 Ugen J.S.Antsilevich * * Idea and grammar partially left from: * Copyright (c) 1993 Daniel Boulet * * Redistribution and use in source forms, with and without modification, * are permitted provided that this entire comment appears intact. * * Redistribution in binary form may occur without any restrictions. * Obviously, it would be nice if you gave credit where credit is due * but requiring it would be too onerous. * * This software is provided ``AS IS'' without any warranties of any kind. * * NEW command line interface for IP firewall facility * * $FreeBSD: head/sbin/ipfw/dummynet.c 187769 2009-01-27 11:06:59Z luigi $ * * dummynet support */ #include #include #include /* XXX there are several sysctl leftover here */ #include #include "ipfw2.h" #include #include #include #include #include #include #include #include #include #include #include #include /* inet_ntoa */ static struct _s_x dummynet_params[] = { { "plr", TOK_PLR }, { "noerror", TOK_NOERROR }, { "buckets", TOK_BUCKETS }, { "dst-ip", TOK_DSTIP }, { "src-ip", TOK_SRCIP }, { "dst-port", TOK_DSTPORT }, { "src-port", TOK_SRCPORT }, { "proto", TOK_PROTO }, { "weight", TOK_WEIGHT }, { "all", TOK_ALL }, { "mask", TOK_MASK }, { "droptail", TOK_DROPTAIL }, { "red", TOK_RED }, { "gred", TOK_GRED }, { "bw", TOK_BW }, { "bandwidth", TOK_BW }, { "delay", TOK_DELAY }, { "pipe", TOK_PIPE }, { "queue", TOK_QUEUE }, { "flow-id", TOK_FLOWID}, { "dst-ipv6", TOK_DSTIP6}, { "dst-ip6", TOK_DSTIP6}, { "src-ipv6", TOK_SRCIP6}, { "src-ip6", TOK_SRCIP6}, { "profile", TOK_PIPE_PROFILE}, { "dummynet-params", TOK_NULL }, { NULL, 0 } /* terminator */ }; /* * XXX to be updated to the new version, * without the global struct command_opts variable */ static int sort_q(void * to_be_done, const void *pa, const void *pb) { int rev = (co.do_sort < 0); int field = rev ? -co.do_sort : co.do_sort; long long res = 0; const struct dn_flow_queue *a = pa; const struct dn_flow_queue *b = pb; switch (field) { case 1: /* pkts */ res = a->len - b->len; break; case 2: /* bytes */ res = a->len_bytes - b->len_bytes; break; case 3: /* tot pkts */ res = a->tot_pkts - b->tot_pkts; break; case 4: /* tot bytes */ res = a->tot_bytes - b->tot_bytes; break; } if (res < 0) res = -1; if (res > 0) res = 1; return (int)(rev ? res : -res); } static void list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q) { int l; int index_printed, indexes = 0; char buff[255]; struct protoent *pe; if (fs->rq_elements == 0) return; if (co.do_sort != 0) qsort_r(q, fs->rq_elements, sizeof *q, NULL, sort_q); /* Print IPv4 flows */ index_printed = 0; for (l = 0; l < fs->rq_elements; l++) { struct in_addr ina; /* XXX: Should check for IPv4 flows */ if (IS_IP6_FLOW_ID(&(q[l].id))) continue; if (!index_printed) { index_printed = 1; if (indexes > 0) /* currently a no-op */ printf("\n"); indexes++; printf(" " "mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", fs->flow_mask.proto, fs->flow_mask.src_ip, fs->flow_mask.src_port, fs->flow_mask.dst_ip, fs->flow_mask.dst_port); printf("BKT Prot ___Source IP/port____ " "____Dest. IP/port____ " "Tot_pkt/bytes Pkt/Byte Drp\n"); } printf("%3d ", q[l].hash_slot); pe = getprotobynumber(q[l].id.proto); if (pe) printf("%-4s ", pe->p_name); else printf("%4u ", q[l].id.proto); ina.s_addr = htonl(q[l].id.src_ip); printf("%15s/%-5d ", inet_ntoa(ina), q[l].id.src_port); ina.s_addr = htonl(q[l].id.dst_ip); printf("%15s/%-5d ", inet_ntoa(ina), q[l].id.dst_port); printf("%4llu %8llu %2u %4u %3u\n", align_uint64(&q[l].tot_pkts), align_uint64(&q[l].tot_bytes), q[l].len, q[l].len_bytes, q[l].drops); if (co.verbose) printf(" S %20llu F %20llu\n", align_uint64(&q[l].S), align_uint64(&q[l].F)); } /* Print IPv6 flows */ index_printed = 0; for (l = 0; l < fs->rq_elements; l++) { if (!IS_IP6_FLOW_ID(&(q[l].id))) continue; if (!index_printed) { index_printed = 1; if (indexes > 0) printf("\n"); indexes++; printf("\n mask: proto: 0x%02x, flow_id: 0x%08x, ", fs->flow_mask.proto, fs->flow_mask.flow_id6); inet_ntop(AF_INET6, &(fs->flow_mask.src_ip6), buff, sizeof(buff)); printf("%s/0x%04x -> ", buff, fs->flow_mask.src_port); inet_ntop( AF_INET6, &(fs->flow_mask.dst_ip6), buff, sizeof(buff) ); printf("%s/0x%04x\n", buff, fs->flow_mask.dst_port); printf("BKT ___Prot___ _flow-id_ " "______________Source IPv6/port_______________ " "_______________Dest. IPv6/port_______________ " "Tot_pkt/bytes Pkt/Byte Drp\n"); } printf("%3d ", q[l].hash_slot); pe = getprotobynumber(q[l].id.proto); if (pe != NULL) printf("%9s ", pe->p_name); else printf("%9u ", q[l].id.proto); printf("%7d %39s/%-5d ", q[l].id.flow_id6, inet_ntop(AF_INET6, &(q[l].id.src_ip6), buff, sizeof(buff)), q[l].id.src_port); printf(" %39s/%-5d ", inet_ntop(AF_INET6, &(q[l].id.dst_ip6), buff, sizeof(buff)), q[l].id.dst_port); printf(" %4llu %8llu %2u %4u %3u\n", align_uint64(&q[l].tot_pkts), align_uint64(&q[l].tot_bytes), q[l].len, q[l].len_bytes, q[l].drops); if (co.verbose) printf(" S %20llu F %20llu\n", align_uint64(&q[l].S), align_uint64(&q[l].F)); } } static void print_flowset_parms(struct dn_flow_set *fs, char *prefix) { int l; char qs[30]; char plr[30]; char red[90]; /* Display RED parameters */ l = fs->qsize; if (fs->flags_fs & DN_QSIZE_IS_BYTES) { if (l >= 8192) sprintf(qs, "%d KB", l / 1024); else sprintf(qs, "%d B", l); } else sprintf(qs, "%3d sl.", l); if (fs->plr) sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); else plr[0] = '\0'; if (fs->flags_fs & DN_IS_RED) /* RED parameters */ sprintf(red, "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 1.0 * fs->w_q / (double)(1 << SCALE_RED), SCALE_VAL(fs->min_th), SCALE_VAL(fs->max_th), 1.0 * fs->max_p / (double)(1 << SCALE_RED)); else sprintf(red, "droptail"); printf("%s %s%s %d queues (%d buckets) %s\n", prefix, qs, plr, fs->rq_elements, fs->rq_size, red); } static void print_extra_delay_parms(struct dn_pipe *p, char *prefix) { double loss; if (p->samples_no <= 0) return; loss = p->loss_level; loss /= p->samples_no; printf("%s profile: name \"%s\" loss %f samples %d\n", prefix, p->name, loss, p->samples_no); } void ipfw_list_pipes(void *data, uint nbytes, int ac, char *av[]) { int rulenum; void *next = data; struct dn_pipe *p = (struct dn_pipe *) data; struct dn_flow_set *fs; struct dn_flow_queue *q; int l; if (ac > 0) rulenum = strtoul(*av++, NULL, 10); else rulenum = 0; for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) { double b = p->bandwidth; char buf[30]; char prefix[80]; if (SLIST_NEXT(p, next) != (struct dn_pipe *)DN_IS_PIPE) break; /* done with pipes, now queues */ /* * compute length, as pipe have variable size */ l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); next = (char *)p + l; nbytes -= l; if ((rulenum != 0 && rulenum != p->pipe_nr) || co.do_pipe == 2) continue; /* * Print rate (or clocking interface) */ if (p->if_name[0] != '\0') sprintf(buf, "%s", p->if_name); else if (b == 0) sprintf(buf, "unlimited"); else if (b >= 1000000) sprintf(buf, "%7.3f Mbit/s", b/1000000); else if (b >= 1000) sprintf(buf, "%7.3f Kbit/s", b/1000); else sprintf(buf, "%7.3f bit/s ", b); sprintf(prefix, "%05d: %s %4d ms ", p->pipe_nr, buf, p->delay); print_extra_delay_parms(p, prefix); print_flowset_parms(&(p->fs), prefix); q = (struct dn_flow_queue *)(p+1); list_queues(&(p->fs), q); } for (fs = next; nbytes >= sizeof *fs; fs = next) { char prefix[80]; if (SLIST_NEXT(fs, next) != (struct dn_flow_set *)DN_IS_QUEUE) break; l = sizeof(*fs) + fs->rq_elements * sizeof(*q); next = (char *)fs + l; nbytes -= l; if (rulenum != 0 && ((rulenum != fs->fs_nr && co.do_pipe == 2) || (rulenum != fs->parent_nr && co.do_pipe == 1))) { continue; } q = (struct dn_flow_queue *)(fs+1); sprintf(prefix, "q%05d: weight %d pipe %d ", fs->fs_nr, fs->weight, fs->parent_nr); print_flowset_parms(fs, prefix); list_queues(fs, q); } } /* * Delete pipe or queue i */ int ipfw_delete_pipe(int pipe_or_queue, int i) { struct dn_pipe p; memset(&p, 0, sizeof p); if (pipe_or_queue == 1) p.pipe_nr = i; /* pipe */ else p.fs.fs_nr = i; /* queue */ i = do_cmd(IP_DUMMYNET_DEL, &p, sizeof p); if (i) { i = 1; warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", i); } return i; } /* * Code to parse delay profiles. * * Some link types introduce extra delays in the transmission * of a packet, e.g. because of MAC level framing, contention on * the use of the channel, MAC level retransmissions and so on. * From our point of view, the channel is effectively unavailable * for this extra time, which is constant or variable depending * on the link type. Additionally, packets may be dropped after this * time (e.g. on a wireless link after too many retransmissions). * We can model the additional delay with an empirical curve * that represents its distribution. * * cumulative probability * 1.0 ^ * | * L +-- loss-level x * | ****** * | * * | ***** * | * * | ** * | * * +-------*-------------------> * delay * * The empirical curve may have both vertical and horizontal lines. * Vertical lines represent constant delay for a range of * probabilities; horizontal lines correspond to a discontinuty * in the delay distribution: the pipe will use the largest delay * for a given probability. * * To pass the curve to dummynet, we must store the parameters * in a file as described below, and issue the command * * ipfw pipe config ... bw XXX profile ... * * The file format is the following, with whitespace acting as * a separator and '#' indicating the beginning a comment: * * samples N * the number of samples used in the internal * representation (2..1024; default 100); * * loss-level L * The probability above which packets are lost. * (0.0 <= L <= 1.0, default 1.0 i.e. no loss); * * name identifier * Optional a name (listed by "ipfw pipe show") * to identify the distribution; * * "delay prob" | "prob delay" * One of these two lines is mandatory and defines * the format of the following lines with data points. * * XXX YYY * 2 or more lines representing points in the curve, * with either delay or probability first, according * to the chosen format. * The unit for delay is milliseconds. * * Data points does not need to be ordered or equal to the number * specified in the "samples" line. ipfw will sort and interpolate * the curve as needed. * * Example of a profile file: name bla_bla_bla samples 100 loss-level 0.86 prob delay 0 200 # minimum overhead is 200ms 0.5 200 0.5 300 0.8 1000 0.9 1300 1 1300 * Internally, we will convert the curve to a fixed number of * samples, and when it is time to transmit a packet we will * model the extra delay as extra bits in the packet. * */ /* XXX move to an array definition ? */ #define ED_MAX_LINE_LEN 256+ED_MAX_NAME_LEN #define ED_TOK_SAMPLES "samples" #define ED_TOK_LOSS "loss-level" #define ED_TOK_NAME "name" #define ED_TOK_DELAY "delay" #define ED_TOK_PROB "prob" #define ED_TOK_BW "bw" #define ED_SEPARATORS " \t\n" #define ED_MIN_SAMPLES_NO 2 /* * returns 1 if s is a non-negative number, with at least one '.' */ static int is_valid_number(const char *s) { int i, dots_found = 0; int len = strlen(s); for (i = 0; i 1)) return 0; return 1; } /* * Take as input a string describing a bandwidth value * and return the numeric bandwidth value. * set clocking interface or bandwidth value */ static void read_bandwidth(char *arg, int *bandwidth, char *if_name, int namelen) { if (*bandwidth != -1) warn("duplicate token, override bandwidth value!"); if (arg[0] >= 'a' && arg[0] <= 'z') { if (namelen >= IFNAMSIZ) warn("interface name truncated"); namelen--; /* interface name */ strncpy(if_name, arg, namelen); if_name[namelen] = '\0'; *bandwidth = 0; } else { /* read bandwidth value */ int bw; char *end = NULL; bw = strtoul(arg, &end, 0); if (*end == 'K' || *end == 'k') { end++; bw *= 1000; } else if (*end == 'M') { end++; bw *= 1000000; } if ((*end == 'B' && _substrcmp2(end, "Bi", "Bit/s") != 0) || _substrcmp2(end, "by", "bytes") == 0) bw *= 8; if (bw < 0) errx(EX_DATAERR, "bandwidth too large"); *bandwidth = bw; if_name[0] = '\0'; } } struct point { double prob; double delay; }; static int compare_points(const void *vp1, const void *vp2) { const struct point *p1 = vp1; const struct point *p2 = vp2; double res = 0; res = p1->prob - p2->prob; if (res == 0) res = p1->delay - p2->delay; if (res < 0) return -1; else if (res > 0) return 1; else return 0; } #define ED_EFMT(s) EX_DATAERR,"error in %s at line %d: "#s,filename,lineno static void load_extra_delays(const char *filename, struct dn_pipe *p) { char line[ED_MAX_LINE_LEN]; FILE *f; int lineno = 0; int i; int samples = -1; double loss = -1.0; char profile_name[ED_MAX_NAME_LEN]; int delay_first = -1; int do_points = 0; struct point points[ED_MAX_SAMPLES_NO]; int points_no = 0; profile_name[0] = '\0'; f = fopen(filename, "r"); if (f == NULL) err(EX_UNAVAILABLE, "fopen: %s", filename); while (fgets(line, ED_MAX_LINE_LEN, f)) { /* read commands */ char *s, *cur = line, *name = NULL, *arg = NULL; ++lineno; /* parse the line */ while (cur) { s = strsep(&cur, ED_SEPARATORS); if (s == NULL || *s == '#') break; if (*s == '\0') continue; if (arg) errx(ED_EFMT("too many arguments")); if (name == NULL) name = s; else arg = s; } if (name == NULL) /* empty line */ continue; if (arg == NULL) errx(ED_EFMT("missing arg for %s"), name); if (!strcasecmp(name, ED_TOK_SAMPLES)) { if (samples > 0) errx(ED_EFMT("duplicate ``samples'' line")); if (atoi(arg) <=0) errx(ED_EFMT("invalid number of samples")); samples = atoi(arg); if (samples>ED_MAX_SAMPLES_NO) errx(ED_EFMT("too many samples, maximum is %d"), ED_MAX_SAMPLES_NO); do_points = 0; } else if (!strcasecmp(name, ED_TOK_BW)) { read_bandwidth(arg, &p->bandwidth, p->if_name, sizeof(p->if_name)); } else if (!strcasecmp(name, ED_TOK_LOSS)) { if (loss != -1.0) errx(ED_EFMT("duplicated token: %s"), name); if (!is_valid_number(arg)) errx(ED_EFMT("invalid %s"), arg); loss = atof(arg); if (loss > 1) errx(ED_EFMT("%s greater than 1.0"), name); do_points = 0; } else if (!strcasecmp(name, ED_TOK_NAME)) { if (profile_name[0] != '\0') errx(ED_EFMT("duplicated token: %s"), name); strncpy(profile_name, arg, sizeof(profile_name) - 1); profile_name[sizeof(profile_name)-1] = '\0'; do_points = 0; } else if (!strcasecmp(name, ED_TOK_DELAY)) { if (do_points) errx(ED_EFMT("duplicated token: %s"), name); delay_first = 1; do_points = 1; } else if (!strcasecmp(name, ED_TOK_PROB)) { if (do_points) errx(ED_EFMT("duplicated token: %s"), name); delay_first = 0; do_points = 1; } else if (do_points) { if (!is_valid_number(name) || !is_valid_number(arg)) errx(ED_EFMT("invalid point found")); if (delay_first) { points[points_no].delay = atof(name); points[points_no].prob = atof(arg); } else { points[points_no].delay = atof(arg); points[points_no].prob = atof(name); } if (points[points_no].prob > 1.0) errx(ED_EFMT("probability greater than 1.0")); ++points_no; } else { errx(ED_EFMT("unrecognised command '%s'"), name); } } if (samples == -1) { warnx("'%s' not found, assuming 100", ED_TOK_SAMPLES); samples = 100; } if (loss == -1.0) { warnx("'%s' not found, assuming no loss", ED_TOK_LOSS); loss = 1; } /* make sure that there are enough points. */ if (points_no < ED_MIN_SAMPLES_NO) errx(ED_EFMT("too few samples, need at least %d"), ED_MIN_SAMPLES_NO); qsort(points, points_no, sizeof(struct point), compare_points); /* interpolation */ for (i = 0; isamples[index] = x1; } else { double m = (y2-y1)/(x2-x1); double c = y1 - m*x1; for (; indexsamples[index] = (index - c)/m; } } p->samples_no = samples; p->loss_level = loss * samples; strncpy(p->name, profile_name, sizeof(p->name)); } void ipfw_config_pipe(int ac, char **av) { int samples[ED_MAX_SAMPLES_NO]; struct dn_pipe p; int i; char *end; void *par = NULL; memset(&p, 0, sizeof p); p.bandwidth = -1; av++; ac--; /* Pipe number */ if (ac && isdigit(**av)) { i = atoi(*av); av++; ac--; if (co.do_pipe == 1) p.pipe_nr = i; else p.fs.fs_nr = i; } while (ac > 0) { double d; int tok = match_token(dummynet_params, *av); ac--; av++; switch(tok) { case TOK_NOERROR: p.fs.flags_fs |= DN_NOERROR; break; case TOK_PLR: NEED1("plr needs argument 0..1\n"); d = strtod(av[0], NULL); if (d > 1) d = 1; else if (d < 0) d = 0; p.fs.plr = (int)(d*0x7fffffff); ac--; av++; break; case TOK_QUEUE: NEED1("queue needs queue size\n"); end = NULL; p.fs.qsize = strtoul(av[0], &end, 0); if (*end == 'K' || *end == 'k') { p.fs.flags_fs |= DN_QSIZE_IS_BYTES; p.fs.qsize *= 1024; } else if (*end == 'B' || _substrcmp2(end, "by", "bytes") == 0) { p.fs.flags_fs |= DN_QSIZE_IS_BYTES; } ac--; av++; break; case TOK_BUCKETS: NEED1("buckets needs argument\n"); p.fs.rq_size = strtoul(av[0], NULL, 0); ac--; av++; break; case TOK_MASK: NEED1("mask needs mask specifier\n"); /* * per-flow queue, mask is dst_ip, dst_port, * src_ip, src_port, proto measured in bits */ par = NULL; bzero(&p.fs.flow_mask, sizeof(p.fs.flow_mask)); end = NULL; while (ac >= 1) { uint32_t *p32 = NULL; uint16_t *p16 = NULL; uint32_t *p20 = NULL; struct in6_addr *pa6 = NULL; uint32_t a; tok = match_token(dummynet_params, *av); ac--; av++; switch(tok) { case TOK_ALL: /* * special case, all bits significant */ p.fs.flow_mask.dst_ip = ~0; p.fs.flow_mask.src_ip = ~0; p.fs.flow_mask.dst_port = ~0; p.fs.flow_mask.src_port = ~0; p.fs.flow_mask.proto = ~0; n2mask(&(p.fs.flow_mask.dst_ip6), 128); n2mask(&(p.fs.flow_mask.src_ip6), 128); p.fs.flow_mask.flow_id6 = ~0; p.fs.flags_fs |= DN_HAVE_FLOW_MASK; goto end_mask; case TOK_DSTIP: p32 = &p.fs.flow_mask.dst_ip; break; case TOK_SRCIP: p32 = &p.fs.flow_mask.src_ip; break; case TOK_DSTIP6: pa6 = &(p.fs.flow_mask.dst_ip6); break; case TOK_SRCIP6: pa6 = &(p.fs.flow_mask.src_ip6); break; case TOK_FLOWID: p20 = &p.fs.flow_mask.flow_id6; break; case TOK_DSTPORT: p16 = &p.fs.flow_mask.dst_port; break; case TOK_SRCPORT: p16 = &p.fs.flow_mask.src_port; break; case TOK_PROTO: break; default: ac++; av--; /* backtrack */ goto end_mask; } if (ac < 1) errx(EX_USAGE, "mask: value missing"); if (*av[0] == '/') { a = strtoul(av[0]+1, &end, 0); if (pa6 == NULL) a = (a == 32) ? ~0 : (1 << a) - 1; } else a = strtoul(av[0], &end, 0); if (p32 != NULL) *p32 = a; else if (p16 != NULL) { if (a > 0xFFFF) errx(EX_DATAERR, "port mask must be 16 bit"); *p16 = (uint16_t)a; } else if (p20 != NULL) { if (a > 0xfffff) errx(EX_DATAERR, "flow_id mask must be 20 bit"); *p20 = (uint32_t)a; } else if (pa6 != NULL) { if (a > 128) errx(EX_DATAERR, "in6addr invalid mask len"); else n2mask(pa6, a); } else { if (a > 0xFF) errx(EX_DATAERR, "proto mask must be 8 bit"); p.fs.flow_mask.proto = (uint8_t)a; } if (a != 0) p.fs.flags_fs |= DN_HAVE_FLOW_MASK; ac--; av++; } /* end while, config masks */ end_mask: break; case TOK_RED: case TOK_GRED: NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); p.fs.flags_fs |= DN_IS_RED; if (tok == TOK_GRED) p.fs.flags_fs |= DN_IS_GENTLE_RED; /* * the format for parameters is w_q/min_th/max_th/max_p */ if ((end = strsep(&av[0], "/"))) { double w_q = strtod(end, NULL); if (w_q > 1 || w_q <= 0) errx(EX_DATAERR, "0 < w_q <= 1"); p.fs.w_q = (int) (w_q * (1 << SCALE_RED)); } if ((end = strsep(&av[0], "/"))) { p.fs.min_th = strtoul(end, &end, 0); if (*end == 'K' || *end == 'k') p.fs.min_th *= 1024; } if ((end = strsep(&av[0], "/"))) { p.fs.max_th = strtoul(end, &end, 0); if (*end == 'K' || *end == 'k') p.fs.max_th *= 1024; } if ((end = strsep(&av[0], "/"))) { double max_p = strtod(end, NULL); if (max_p > 1 || max_p <= 0) errx(EX_DATAERR, "0 < max_p <= 1"); p.fs.max_p = (int)(max_p * (1 << SCALE_RED)); } ac--; av++; break; case TOK_DROPTAIL: p.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); break; case TOK_BW: NEED1("bw needs bandwidth or interface\n"); if (co.do_pipe != 1) errx(EX_DATAERR, "bandwidth only valid for pipes"); read_bandwidth(av[0], &p.bandwidth, p.if_name, sizeof(p.if_name)); ac--; av++; break; case TOK_DELAY: if (co.do_pipe != 1) errx(EX_DATAERR, "delay only valid for pipes"); NEED1("delay needs argument 0..10000ms\n"); p.delay = strtoul(av[0], NULL, 0); ac--; av++; break; case TOK_WEIGHT: if (co.do_pipe == 1) errx(EX_DATAERR,"weight only valid for queues"); NEED1("weight needs argument 0..100\n"); p.fs.weight = strtoul(av[0], &end, 0); ac--; av++; break; case TOK_PIPE: if (co.do_pipe == 1) errx(EX_DATAERR,"pipe only valid for queues"); NEED1("pipe needs pipe_number\n"); p.fs.parent_nr = strtoul(av[0], &end, 0); ac--; av++; break; case TOK_PIPE_PROFILE: if (co.do_pipe != 1) errx(EX_DATAERR, "extra delay only valid for pipes"); NEED1("extra delay needs the file name\n"); p.samples = &samples[0]; load_extra_delays(av[0], &p); --ac; ++av; break; default: errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]); } } if (co.do_pipe == 1) { if (p.pipe_nr == 0) errx(EX_DATAERR, "pipe_nr must be > 0"); if (p.delay > 10000) errx(EX_DATAERR, "delay must be < 10000"); } else { /* co.do_pipe == 2, queue */ if (p.fs.parent_nr == 0) errx(EX_DATAERR, "pipe must be > 0"); if (p.fs.weight >100) errx(EX_DATAERR, "weight must be <= 100"); } /* check for bandwidth value */ if (p.bandwidth == -1) { p.bandwidth = 0; if (p.samples_no > 0) errx(EX_DATAERR, "profile requires a bandwidth limit"); } if (p.fs.flags_fs & DN_QSIZE_IS_BYTES) { size_t len; long limit; len = sizeof(limit); if (sysctlbyname("net.inet.ip.dummynet.pipe_byte_limit", &limit, &len, NULL, 0) == -1) limit = 1024*1024; if (p.fs.qsize > limit) errx(EX_DATAERR, "queue size must be < %ldB", limit); } else { size_t len; long limit; len = sizeof(limit); if (sysctlbyname("net.inet.ip.dummynet.pipe_slot_limit", &limit, &len, NULL, 0) == -1) limit = 100; if (p.fs.qsize > limit) errx(EX_DATAERR, "2 <= queue size <= %ld", limit); } if (p.fs.flags_fs & DN_IS_RED) { size_t len; int lookup_depth, avg_pkt_size; double s, idle, weight, w_q; struct clockinfo ck; int t; if (p.fs.min_th >= p.fs.max_th) errx(EX_DATAERR, "min_th %d must be < than max_th %d", p.fs.min_th, p.fs.max_th); if (p.fs.max_th == 0) errx(EX_DATAERR, "max_th must be > 0"); len = sizeof(int); if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", &lookup_depth, &len, NULL, 0) == -1) errx(1, "sysctlbyname(\"%s\")", "net.inet.ip.dummynet.red_lookup_depth"); if (lookup_depth == 0) errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" " must be greater than zero"); len = sizeof(int); if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", &avg_pkt_size, &len, NULL, 0) == -1) errx(1, "sysctlbyname(\"%s\")", "net.inet.ip.dummynet.red_avg_pkt_size"); if (avg_pkt_size == 0) errx(EX_DATAERR, "net.inet.ip.dummynet.red_avg_pkt_size must" " be greater than zero"); len = sizeof(struct clockinfo); if (sysctlbyname("kern.clockrate", &ck, &len, NULL, 0) == -1) errx(1, "sysctlbyname(\"%s\")", "kern.clockrate"); /* * Ticks needed for sending a medium-sized packet. * Unfortunately, when we are configuring a WF2Q+ queue, we * do not have bandwidth information, because that is stored * in the parent pipe, and also we have multiple queues * competing for it. So we set s=0, which is not very * correct. But on the other hand, why do we want RED with * WF2Q+ ? */ if (p.bandwidth==0) /* this is a WF2Q+ queue */ s = 0; else s = (double)ck.hz * avg_pkt_size * 8 / p.bandwidth; /* * max idle time (in ticks) before avg queue size becomes 0. * NOTA: (3/w_q) is approx the value x so that * (1-w_q)^x < 10^-3. */ w_q = ((double)p.fs.w_q) / (1 << SCALE_RED); idle = s * 3. / w_q; p.fs.lookup_step = (int)idle / lookup_depth; if (!p.fs.lookup_step) p.fs.lookup_step = 1; weight = 1 - w_q; for (t = p.fs.lookup_step; t > 1; --t) weight *= 1 - w_q; p.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); } if (p.samples_no <= 0) { i = do_cmd(IP_DUMMYNET_CONFIGURE, &p, sizeof p); } else { struct dn_pipe_max pm; int len = sizeof(pm); memcpy(&pm.pipe, &p, sizeof(pm.pipe)); memcpy(&pm.samples, samples, sizeof(pm.samples)); i = do_cmd(IP_DUMMYNET_CONFIGURE, &pm, len); } if (i) err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); }