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bbf46d80db
freebsd-dev/sbin/ipfw/dummynet.c
Luigi Rizzo bbf46d80db remove a printf that was only useful for debugging. 
MFC after:	3 days
2009-06-05 13:11:34 +00:00

1033 lines
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/*
* 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
*
* $FreeBSD$
*
* dummynet support
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/queue.h>
/* XXX there are several sysctl leftover here */
#include <sys/sysctl.h>
#include "ipfw2.h"
#include <ctype.h>
#include <err.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/ip_fw.h>
#include <netinet/ip_dummynet.h>
#include <arpa/inet.h> /* 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 */
};
static int
sort_q(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)
heapsort(q, fs->rq_elements, sizeof *q, 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 <n> config ... bw XXX profile <filename> ...
*
* 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.
*
*/
#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_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<len; ++i)
if (!isdigit(s[i]) && (s[i] !='.' || ++dots_found > 1))
return 0;
return 1;
}
struct point {
double prob;
double delay;
};
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_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; i<points_no-1; ++i) {
double y1 = points[i].prob * samples;
double x1 = points[i].delay;
double y2 = points[i+1].prob * samples;
double x2 = points[i+1].delay;
int index = y1;
int stop = y2;
if (x1 == x2) {
for (; index<stop; ++index)
p->samples[index] = x1;
} else {
double m = (y2-y1)/(x2-x1);
double c = y1 - m*x1;
for (; index<stop ; ++index)
p->samples[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);
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");
/*
* set clocking interface or bandwidth value
*/
if (av[0][0] >= 'a' && av[0][0] <= 'z') {
int l = sizeof(p.if_name)-1;
/* interface name */
strncpy(p.if_name, av[0], l);
p.if_name[l] = '\0';
p.bandwidth = 0;
} else {
p.if_name[0] = '\0';
p.bandwidth = strtoul(av[0], &end, 0);
if (*end == 'K' || *end == 'k') {
end++;
p.bandwidth *= 1000;
} else if (*end == 'M') {
end++;
p.bandwidth *= 1000000;
}
if ((*end == 'B' &&
_substrcmp2(end, "Bi", "Bit/s") != 0) ||
_substrcmp2(end, "by", "bytes") == 0)
p.bandwidth *= 8;
if (p.bandwidth < 0)
errx(EX_DATAERR, "bandwidth too large");
}
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");
if (p.samples_no > 0 && p.bandwidth == 0)
errx(EX_DATAERR,
"profile requires a bandwidth limit");
} 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");
}
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");
}
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