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freebsd-skq/sbin/ipfw/dummynet.c
pfg d61fecb273 Revert r327005 - SPDX tags for license similar to BSD-2-Clause. 
After consultation with SPDX experts and their matching guidelines[1],
the licensing doesn't exactly match the BSD-2-Clause. It yet remains to be
determined if they are equivalent or if there is a recognized license that
matches but it is safer to just revert the tags.

Let this also be a reminder that on FreeBSD, SPDX tags are only advisory
and have no legal value (but IANAL).

Pointyhat to:	pfg
Thanks to:	Rodney Grimes, Gary O'Neall

[1] https://spdx.org/spdx-license-list/matching-guidelines
2017-12-20 20:25:28 +00:00

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/*-
* Codel/FQ_Codel and PIE/FQ_PIE Code:
* Copyright (C) 2016 Centre for Advanced Internet Architectures,
* Swinburne University of Technology, Melbourne, Australia.
* Portions of this code were made possible in part by a gift from
* The Comcast Innovation Fund.
* Implemented by Rasool Al-Saadi <ralsaadi@swin.edu.au>
*
* Copyright (c) 2002-2003,2010 Luigi Rizzo
*
* 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.
*
* $FreeBSD$
*
* dummynet support
*/
#define NEW_AQM
#include <sys/types.h>
#include <sys/socket.h>
/* XXX there are several sysctl leftover here */
#include <sys/sysctl.h>
#include "ipfw2.h"
#ifdef NEW_AQM
#include <stdint.h>
#endif
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <libutil.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 },
{ "lmax", TOK_LMAX },
{ "maxlen", TOK_LMAX },
{ "all", TOK_ALL },
{ "mask", TOK_MASK }, /* alias for both */
{ "sched_mask", TOK_SCHED_MASK },
{ "flow_mask", TOK_FLOW_MASK },
{ "droptail", TOK_DROPTAIL },
{ "ecn", TOK_ECN },
{ "red", TOK_RED },
{ "gred", TOK_GRED },
#ifdef NEW_AQM
{ "codel", TOK_CODEL}, /* Codel AQM */
{ "fq_codel", TOK_FQ_CODEL}, /* FQ-Codel */
{ "pie", TOK_PIE}, /* PIE AQM */
{ "fq_pie", TOK_FQ_PIE}, /* FQ-PIE */
#endif
{ "bw", TOK_BW },
{ "bandwidth", TOK_BW },
{ "delay", TOK_DELAY },
{ "link", TOK_LINK },
{ "pipe", TOK_PIPE },
{ "queue", TOK_QUEUE },
{ "flowset", TOK_FLOWSET },
{ "sched", TOK_SCHED },
{ "pri", TOK_PRI },
{ "priority", TOK_PRI },
{ "type", TOK_TYPE },
{ "flow-id", TOK_FLOWID},
{ "dst-ipv6", TOK_DSTIP6},
{ "dst-ip6", TOK_DSTIP6},
{ "src-ipv6", TOK_SRCIP6},
{ "src-ip6", TOK_SRCIP6},
{ "profile", TOK_PROFILE},
{ "burst", TOK_BURST},
{ "dummynet-params", TOK_NULL },
{ NULL, 0 } /* terminator */
};
#ifdef NEW_AQM
/* AQM/extra sched parameters tokens*/
static struct _s_x aqm_params[] = {
{ "target", TOK_TARGET},
{ "interval", TOK_INTERVAL},
{ "limit", TOK_LIMIT},
{ "flows", TOK_FLOWS},
{ "quantum", TOK_QUANTUM},
{ "ecn", TOK_ECN},
{ "noecn", TOK_NO_ECN},
{ "tupdate", TOK_TUPDATE},
{ "max_burst", TOK_MAX_BURST},
{ "max_ecnth", TOK_MAX_ECNTH},
{ "alpha", TOK_ALPHA},
{ "beta", TOK_BETA},
{ "capdrop", TOK_CAPDROP},
{ "nocapdrop", TOK_NO_CAPDROP},
{ "onoff", TOK_ONOFF},
{ "dre", TOK_DRE},
{ "ts", TOK_TS},
{ "derand", TOK_DERAND},
{ "noderand", TOK_NO_DERAND},
{ NULL, 0 } /* terminator */
};
#endif
#define O_NEXT(p, len) ((void *)((char *)p + len))
static void
oid_fill(struct dn_id *oid, int len, int type, uintptr_t id)
{
oid->len = len;
oid->type = type;
oid->subtype = 0;
oid->id = id;
}
/* make room in the buffer and move the pointer forward */
static void *
o_next(struct dn_id **o, int len, int type)
{
struct dn_id *ret = *o;
oid_fill(ret, len, type, 0);
*o = O_NEXT(*o, len);
return ret;
}
#ifdef NEW_AQM
/* Codel flags */
enum {
CODEL_ECN_ENABLED = 1
};
/* PIE flags, from PIE kernel module */
enum {
PIE_ECN_ENABLED = 1,
PIE_CAPDROP_ENABLED = 2,
PIE_ON_OFF_MODE_ENABLED = 4,
PIE_DEPRATEEST_ENABLED = 8,
PIE_DERAND_ENABLED = 16
};
#define PIE_FIX_POINT_BITS 13
#define PIE_SCALE (1L<<PIE_FIX_POINT_BITS)
/* integer to time */
void
us_to_time(int t,char *strt)
{
if (t < 0)
strt[0]='\0';
else if ( t==0 )
sprintf(strt,"%d", t);
else if (t< 1000)
sprintf(strt,"%dus", t);
else if (t < 1000000)
sprintf(strt,"%gms", (float) t / 1000);
else
sprintf(strt,"%gfs", (float) t / 1000000);
}
/*
* returns -1 if s is not a valid time, otherwise, return time in us
*/
static long
time_to_us(const char *s)
{
int i, dots = 0;
int len = strlen(s);
char strt[16]="", stru[16]="";
if (len>15)
return -1;
for (i = 0; i<len && (isdigit(s[i]) || s[i]=='.') ; i++)
if (s[i]=='.') {
if (dots)
return -1;
else
dots++;
}
if (!i)
return -1;
strncpy(strt, s, i);
if (i<len)
strcpy(stru, s+i);
else
strcpy(stru, "ms");
if (!strcasecmp(stru, "us"))
return atol(strt);
if (!strcasecmp(stru, "ms"))
return (strtod(strt, NULL) * 1000);
if (!strcasecmp(stru, "s"))
return (strtod(strt, NULL)*1000000);
return -1;
}
/* Get AQM or scheduler extra parameters */
void
get_extra_parms(uint32_t nr, char *out, int subtype)
{
struct dn_extra_parms *ep;
int ret;
char strt1[15], strt2[15], strt3[15];
u_int l;
/* prepare the request */
l = sizeof(struct dn_extra_parms);
ep = safe_calloc(1, l);
memset(ep, 0, sizeof(*ep));
*out = '\0';
oid_fill(&ep->oid, l, DN_CMD_GET, DN_API_VERSION);
ep->oid.len = l;
ep->oid.subtype = subtype;
ep->nr = nr;
ret = do_cmd(-IP_DUMMYNET3, ep, (uintptr_t)&l);
if (ret) {
free(ep);
errx(EX_DATAERR, "Error getting extra parameters\n");
}
switch (subtype) {
case DN_AQM_PARAMS:
if( !strcasecmp(ep->name, "codel")) {
us_to_time(ep->par[0], strt1);
us_to_time(ep->par[1], strt2);
l = sprintf(out, " AQM CoDel target %s interval %s",
strt1, strt2);
if (ep->par[2] & CODEL_ECN_ENABLED)
l = sprintf(out + l, " ECN");
else
l += sprintf(out + l, " NoECN");
} else if( !strcasecmp(ep->name, "pie")) {
us_to_time(ep->par[0], strt1);
us_to_time(ep->par[1], strt2);
us_to_time(ep->par[2], strt3);
l = sprintf(out, " AQM type PIE target %s tupdate %s alpha "
"%g beta %g max_burst %s max_ecnth %.3g",
strt1,
strt2,
ep->par[4] / (float) PIE_SCALE,
ep->par[5] / (float) PIE_SCALE,
strt3,
ep->par[3] / (float) PIE_SCALE
);
if (ep->par[6] & PIE_ECN_ENABLED)
l += sprintf(out + l, " ECN");
else
l += sprintf(out + l, " NoECN");
if (ep->par[6] & PIE_CAPDROP_ENABLED)
l += sprintf(out + l, " CapDrop");
else
l += sprintf(out + l, " NoCapDrop");
if (ep->par[6] & PIE_ON_OFF_MODE_ENABLED)
l += sprintf(out + l, " OnOff");
if (ep->par[6] & PIE_DEPRATEEST_ENABLED)
l += sprintf(out + l, " DRE");
else
l += sprintf(out + l, " TS");
if (ep->par[6] & PIE_DERAND_ENABLED)
l += sprintf(out + l, " Derand");
else
l += sprintf(out + l, " NoDerand");
}
break;
case DN_SCH_PARAMS:
if (!strcasecmp(ep->name,"FQ_CODEL")) {
us_to_time(ep->par[0], strt1);
us_to_time(ep->par[1], strt2);
l = sprintf(out," FQ_CODEL target %s interval %s"
" quantum %jd limit %jd flows %jd",
strt1, strt2,
(intmax_t) ep->par[3],
(intmax_t) ep->par[4],
(intmax_t) ep->par[5]
);
if (ep->par[2] & CODEL_ECN_ENABLED)
l += sprintf(out + l, " ECN");
else
l += sprintf(out + l, " NoECN");
l += sprintf(out + l, "\n");
} else if (!strcasecmp(ep->name,"FQ_PIE")) {
us_to_time(ep->par[0], strt1);
us_to_time(ep->par[1], strt2);
us_to_time(ep->par[2], strt3);
l = sprintf(out, " FQ_PIE target %s tupdate %s alpha "
"%g beta %g max_burst %s max_ecnth %.3g"
" quantum %jd limit %jd flows %jd",
strt1,
strt2,
ep->par[4] / (float) PIE_SCALE,
ep->par[5] / (float) PIE_SCALE,
strt3,
ep->par[3] / (float) PIE_SCALE,
(intmax_t) ep->par[7],
(intmax_t) ep->par[8],
(intmax_t) ep->par[9]
);
if (ep->par[6] & PIE_ECN_ENABLED)
l += sprintf(out + l, " ECN");
else
l += sprintf(out + l, " NoECN");
if (ep->par[6] & PIE_CAPDROP_ENABLED)
l += sprintf(out + l, " CapDrop");
else
l += sprintf(out + l, " NoCapDrop");
if (ep->par[6] & PIE_ON_OFF_MODE_ENABLED)
l += sprintf(out + l, " OnOff");
if (ep->par[6] & PIE_DEPRATEEST_ENABLED)
l += sprintf(out + l, " DRE");
else
l += sprintf(out + l, " TS");
if (ep->par[6] & PIE_DERAND_ENABLED)
l += sprintf(out + l, " Derand");
else
l += sprintf(out + l, " NoDerand");
l += sprintf(out + l, "\n");
}
break;
}
free(ep);
}
#endif
#if 0
static int
sort_q(void *arg, 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);
}
#endif
/* print a mask and header for the subsequent list of flows */
static void
print_mask(struct ipfw_flow_id *id)
{
if (!IS_IP6_FLOW_ID(id)) {
printf(" "
"mask: %s 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n",
id->extra ? "queue," : "",
id->proto,
id->src_ip, id->src_port,
id->dst_ip, id->dst_port);
} else {
char buf[255];
printf("\n mask: %sproto: 0x%02x, flow_id: 0x%08x, ",
id->extra ? "queue," : "",
id->proto, id->flow_id6);
inet_ntop(AF_INET6, &(id->src_ip6), buf, sizeof(buf));
printf("%s/0x%04x -> ", buf, id->src_port);
inet_ntop(AF_INET6, &(id->dst_ip6), buf, sizeof(buf));
printf("%s/0x%04x\n", buf, id->dst_port);
}
}
static void
print_header(struct ipfw_flow_id *id)
{
if (!IS_IP6_FLOW_ID(id))
printf("BKT Prot ___Source IP/port____ "
"____Dest. IP/port____ "
"Tot_pkt/bytes Pkt/Byte Drp\n");
else
printf("BKT ___Prot___ _flow-id_ "
"______________Source IPv6/port_______________ "
"_______________Dest. IPv6/port_______________ "
"Tot_pkt/bytes Pkt/Byte Drp\n");
}
static void
list_flow(struct buf_pr *bp, struct dn_flow *ni)
{
char buff[255];
struct protoent *pe = NULL;
struct in_addr ina;
struct ipfw_flow_id *id = &ni->fid;
pe = getprotobynumber(id->proto);
/* XXX: Should check for IPv4 flows */
bprintf(bp, "%3u%c", (ni->oid.id) & 0xff,
id->extra ? '*' : ' ');
if (!IS_IP6_FLOW_ID(id)) {
if (pe)
bprintf(bp, "%-4s ", pe->p_name);
else
bprintf(bp, "%4u ", id->proto);
ina.s_addr = htonl(id->src_ip);
bprintf(bp, "%15s/%-5d ",
inet_ntoa(ina), id->src_port);
ina.s_addr = htonl(id->dst_ip);
bprintf(bp, "%15s/%-5d ",
inet_ntoa(ina), id->dst_port);
} else {
/* Print IPv6 flows */
if (pe != NULL)
bprintf(bp, "%9s ", pe->p_name);
else
bprintf(bp, "%9u ", id->proto);
bprintf(bp, "%7d %39s/%-5d ", id->flow_id6,
inet_ntop(AF_INET6, &(id->src_ip6), buff, sizeof(buff)),
id->src_port);
bprintf(bp, " %39s/%-5d ",
inet_ntop(AF_INET6, &(id->dst_ip6), buff, sizeof(buff)),
id->dst_port);
}
pr_u64(bp, &ni->tot_pkts, 4);
pr_u64(bp, &ni->tot_bytes, 8);
bprintf(bp, "%2u %4u %3u",
ni->length, ni->len_bytes, ni->drops);
}
static void
print_flowset_parms(struct dn_fs *fs, char *prefix)
{
int l;
char qs[30];
char plr[30];
char red[200]; /* Display RED parameters */
l = fs->qsize;
if (fs->flags & DN_QSIZE_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 & DN_IS_RED) { /* RED parameters */
sprintf(red,
"\n\t %cRED w_q %f min_th %d max_th %d max_p %f",
(fs->flags & DN_IS_GENTLE_RED) ? 'G' : ' ',
1.0 * fs->w_q / (double)(1 << SCALE_RED),
fs->min_th,
fs->max_th,
1.0 * fs->max_p / (double)(1 << SCALE_RED));
if (fs->flags & DN_IS_ECN)
strncat(red, " (ecn)", 6);
#ifdef NEW_AQM
/* get AQM parameters */
} else if (fs->flags & DN_IS_AQM) {
get_extra_parms(fs->fs_nr, red, DN_AQM_PARAMS);
#endif
} else
sprintf(red, "droptail");
if (prefix[0]) {
printf("%s %s%s %d queues (%d buckets) %s\n",
prefix, qs, plr, fs->oid.id, fs->buckets, red);
prefix[0] = '\0';
} else {
printf("q%05d %s%s %d flows (%d buckets) sched %d "
"weight %d lmax %d pri %d %s\n",
fs->fs_nr, qs, plr, fs->oid.id, fs->buckets,
fs->sched_nr, fs->par[0], fs->par[1], fs->par[2], red);
if (fs->flags & DN_HAVE_MASK)
print_mask(&fs->flow_mask);
}
}
static void
print_extra_delay_parms(struct dn_profile *p)
{
double loss;
if (p->samples_no <= 0)
return;
loss = p->loss_level;
loss /= p->samples_no;
printf("\t profile: name \"%s\" loss %f samples %d\n",
p->name, loss, p->samples_no);
}
static void
flush_buf(char *buf)
{
if (buf[0])
printf("%s\n", buf);
buf[0] = '\0';
}
/*
* generic list routine. We expect objects in a specific order, i.e.
* PIPES AND SCHEDULERS:
* link; scheduler; internal flowset if any; instances
* we can tell a pipe from the number.
*
* FLOWSETS:
* flowset; queues;
* link i (int queue); scheduler i; si(i) { flowsets() : queues }
*/
static void
list_pipes(struct dn_id *oid, struct dn_id *end)
{
char buf[160]; /* pending buffer */
int toPrint = 1; /* print header */
struct buf_pr bp;
buf[0] = '\0';
bp_alloc(&bp, 4096);
for (; oid != end; oid = O_NEXT(oid, oid->len)) {
if (oid->len < sizeof(*oid))
errx(1, "invalid oid len %d\n", oid->len);
switch (oid->type) {
default:
flush_buf(buf);
printf("unrecognized object %d size %d\n", oid->type, oid->len);
break;
case DN_TEXT: /* list of attached flowsets */
{
int i, l;
struct {
struct dn_id id;
uint32_t p[0];
} *d = (void *)oid;
l = (oid->len - sizeof(*oid))/sizeof(d->p[0]);
if (l == 0)
break;
printf(" Children flowsets: ");
for (i = 0; i < l; i++)
printf("%u ", d->p[i]);
printf("\n");
break;
}
case DN_CMD_GET:
if (co.verbose)
printf("answer for cmd %d, len %d\n", oid->type, oid->id);
break;
case DN_SCH: {
struct dn_sch *s = (struct dn_sch *)oid;
flush_buf(buf);
printf(" sched %d type %s flags 0x%x %d buckets %d active\n",
s->sched_nr,
s->name, s->flags, s->buckets, s->oid.id);
#ifdef NEW_AQM
char parms[200];
get_extra_parms(s->sched_nr, parms, DN_SCH_PARAMS);
printf("%s",parms);
#endif
if (s->flags & DN_HAVE_MASK)
print_mask(&s->sched_mask);
}
break;
case DN_FLOW:
if (toPrint != 0) {
print_header(&((struct dn_flow *)oid)->fid);
toPrint = 0;
}
list_flow(&bp, (struct dn_flow *)oid);
printf("%s\n", bp.buf);
bp_flush(&bp);
break;
case DN_LINK: {
struct dn_link *p = (struct dn_link *)oid;
double b = p->bandwidth;
char bwbuf[30];
char burst[5 + 7];
/* This starts a new object so flush buffer */
flush_buf(buf);
/* data rate */
if (b == 0)
sprintf(bwbuf, "unlimited ");
else if (b >= 1000000000)
sprintf(bwbuf, "%7.3f Gbit/s", b/1000000000);
else if (b >= 1000000)
sprintf(bwbuf, "%7.3f Mbit/s", b/1000000);
else if (b >= 1000)
sprintf(bwbuf, "%7.3f Kbit/s", b/1000);
else
sprintf(bwbuf, "%7.3f bit/s ", b);
if (humanize_number(burst, sizeof(burst), p->burst,
"", HN_AUTOSCALE, 0) < 0 || co.verbose)
sprintf(burst, "%d", (int)p->burst);
sprintf(buf, "%05d: %s %4d ms burst %s",
p->link_nr % DN_MAX_ID, bwbuf, p->delay, burst);
}
break;
case DN_FS:
print_flowset_parms((struct dn_fs *)oid, buf);
break;
case DN_PROFILE:
flush_buf(buf);
print_extra_delay_parms((struct dn_profile *)oid);
}
flush_buf(buf); // XXX does it really go here ?
}
bp_free(&bp);
}
/*
* Delete pipe, queue or scheduler i
*/
int
ipfw_delete_pipe(int do_pipe, int i)
{
struct {
struct dn_id oid;
uintptr_t a[1]; /* add more if we want a list */
} cmd;
oid_fill((void *)&cmd, sizeof(cmd), DN_CMD_DELETE, DN_API_VERSION);
cmd.oid.subtype = (do_pipe == 1) ? DN_LINK :
( (do_pipe == 2) ? DN_FS : DN_SCH);
cmd.a[0] = i;
i = do_cmd(IP_DUMMYNET3, &cmd, cmd.oid.len);
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 link 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_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<len; ++i)
if (!isdigit(s[i]) && (s[i] !='.' || ++dots_found > 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)
warnx("duplicate token, override bandwidth value!");
if (arg[0] >= 'a' && arg[0] <= 'z') {
if (!if_name) {
errx(1, "no if support");
}
if (namelen >= IFNAMSIZ)
warn("interface name truncated");
namelen--;
/* interface name */
strlcpy(if_name, arg, namelen);
*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 == 'm') {
end++;
bw *= 1000000;
} else if (*end == 'G' || *end == 'g') {
end++;
bw *= 1000000000;
}
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 (if_name)
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_profile *p,
struct dn_link *link)
{
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;
/* XXX link never NULL? */
p->link_nr = link->link_nr;
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)) {
char buf[IFNAMSIZ];
read_bandwidth(arg, &link->bandwidth, buf, sizeof(buf));
} 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);
strlcpy(profile_name, arg, sizeof(profile_name));
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);
}
}
fclose (f);
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 ix = y1;
int stop = y2;
if (x1 == x2) {
for (; ix<stop; ++ix)
p->samples[ix] = x1;
} else {
double m = (y2-y1)/(x2-x1);
double c = y1 - m*x1;
for (; ix<stop ; ++ix)
p->samples[ix] = (ix - c)/m;
}
}
p->samples_no = samples;
p->loss_level = loss * samples;
strlcpy(p->name, profile_name, sizeof(p->name));
}
#ifdef NEW_AQM
/* Parse AQM/extra scheduler parameters */
static int
process_extra_parms(int *ac, char **av, struct dn_extra_parms *ep,
uint16_t type)
{
int i;
/* use kernel defaults */
for (i=0; i<DN_MAX_EXTRA_PARM; i++)
ep->par[i] = -1;
switch(type) {
case TOK_CODEL:
case TOK_FQ_CODEL:
/* Codel
* 0- target, 1- interval, 2- flags,
* FQ_CODEL
* 3- quantum, 4- limit, 5- flows
*/
if (type==TOK_CODEL)
ep->par[2] = 0;
else
ep->par[2] = CODEL_ECN_ENABLED;
while (*ac > 0) {
int tok = match_token(aqm_params, *av);
(*ac)--; av++;
switch(tok) {
case TOK_TARGET:
if (*ac <= 0 || time_to_us(av[0]) < 0)
errx(EX_DATAERR, "target needs time\n");
ep->par[0] = time_to_us(av[0]);
(*ac)--; av++;
break;
case TOK_INTERVAL:
if (*ac <= 0 || time_to_us(av[0]) < 0)
errx(EX_DATAERR, "interval needs time\n");
ep->par[1] = time_to_us(av[0]);
(*ac)--; av++;
break;
case TOK_ECN:
ep->par[2] = CODEL_ECN_ENABLED;
break;
case TOK_NO_ECN:
ep->par[2] &= ~CODEL_ECN_ENABLED;
break;
/* Config fq_codel parameters */
case TOK_QUANTUM:
if (type != TOK_FQ_CODEL)
errx(EX_DATAERR, "quantum is not for codel\n");
if (*ac <= 0 || !is_valid_number(av[0]))
errx(EX_DATAERR, "quantum needs number\n");
ep->par[3]= atoi(av[0]);
(*ac)--; av++;
break;
case TOK_LIMIT:
if (type != TOK_FQ_CODEL)
errx(EX_DATAERR, "limit is not for codel, use queue instead\n");
if (*ac <= 0 || !is_valid_number(av[0]))
errx(EX_DATAERR, "limit needs number\n");
ep->par[4] = atoi(av[0]);
(*ac)--; av++;
break;
case TOK_FLOWS:
if (type != TOK_FQ_CODEL)
errx(EX_DATAERR, "flows is not for codel\n");
if (*ac <= 0 || !is_valid_number(av[0]))
errx(EX_DATAERR, "flows needs number\n");
ep->par[5] = atoi(av[0]);
(*ac)--; av++;
break;
default:
printf("%s is Invalid parameter\n", av[-1]);
}
}
break;
case TOK_PIE:
case TOK_FQ_PIE:
/* PIE
* 0- target , 1- tupdate, 2- max_burst,
* 3- max_ecnth, 4- alpha,
* 5- beta, 6- flags
* FQ_CODEL
* 7- quantum, 8- limit, 9- flows
*/
if ( type == TOK_PIE)
ep->par[6] = PIE_CAPDROP_ENABLED | PIE_DEPRATEEST_ENABLED
| PIE_DERAND_ENABLED;
else
/* for FQ-PIE, use TS mode */
ep->par[6] = PIE_CAPDROP_ENABLED | PIE_DERAND_ENABLED
| PIE_ECN_ENABLED;
while (*ac > 0) {
int tok = match_token(aqm_params, *av);
(*ac)--; av++;
switch(tok) {
case TOK_TARGET:
if (*ac <= 0 || time_to_us(av[0]) < 0)
errx(EX_DATAERR, "target needs time\n");
ep->par[0] = time_to_us(av[0]);
(*ac)--; av++;
break;
case TOK_TUPDATE:
if (*ac <= 0 || time_to_us(av[0]) < 0)
errx(EX_DATAERR, "tupdate needs time\n");
ep->par[1] = time_to_us(av[0]);
(*ac)--; av++;
break;
case TOK_MAX_BURST:
if (*ac <= 0 || time_to_us(av[0]) < 0)
errx(EX_DATAERR, "max_burst needs time\n");
ep->par[2] = time_to_us(av[0]);
(*ac)--; av++;
break;
case TOK_MAX_ECNTH:
if (*ac <= 0 || !is_valid_number(av[0]))
errx(EX_DATAERR, "max_ecnth needs number\n");
ep->par[3] = atof(av[0]) * PIE_SCALE;
(*ac)--; av++;
break;
case TOK_ALPHA:
if (*ac <= 0 || !is_valid_number(av[0]))
errx(EX_DATAERR, "alpha needs number\n");
ep->par[4] = atof(av[0]) * PIE_SCALE;
(*ac)--; av++;
break;
case TOK_BETA:
if (*ac <= 0 || !is_valid_number(av[0]))
errx(EX_DATAERR, "beta needs number\n");
ep->par[5] = atof(av[0]) * PIE_SCALE;
(*ac)--; av++;
break;
case TOK_ECN:
ep->par[6] |= PIE_ECN_ENABLED;
break;
case TOK_NO_ECN:
ep->par[6] &= ~PIE_ECN_ENABLED;
break;
case TOK_CAPDROP:
ep->par[6] |= PIE_CAPDROP_ENABLED;
break;
case TOK_NO_CAPDROP:
ep->par[6] &= ~PIE_CAPDROP_ENABLED;
break;
case TOK_ONOFF:
ep->par[6] |= PIE_ON_OFF_MODE_ENABLED;
break;
case TOK_DRE:
ep->par[6] |= PIE_DEPRATEEST_ENABLED;
break;
case TOK_TS:
ep->par[6] &= ~PIE_DEPRATEEST_ENABLED;
break;
case TOK_DERAND:
ep->par[6] |= PIE_DERAND_ENABLED;
break;
case TOK_NO_DERAND:
ep->par[6] &= ~PIE_DERAND_ENABLED;
break;
/* Config fq_pie parameters */
case TOK_QUANTUM:
if (type != TOK_FQ_PIE)
errx(EX_DATAERR, "quantum is not for pie\n");
if (*ac <= 0 || !is_valid_number(av[0]))
errx(EX_DATAERR, "quantum needs number\n");
ep->par[7]= atoi(av[0]);
(*ac)--; av++;
break;
case TOK_LIMIT:
if (type != TOK_FQ_PIE)
errx(EX_DATAERR, "limit is not for pie, use queue instead\n");
if (*ac <= 0 || !is_valid_number(av[0]))
errx(EX_DATAERR, "limit needs number\n");
ep->par[8] = atoi(av[0]);
(*ac)--; av++;
break;
case TOK_FLOWS:
if (type != TOK_FQ_PIE)
errx(EX_DATAERR, "flows is not for pie\n");
if (*ac <= 0 || !is_valid_number(av[0]))
errx(EX_DATAERR, "flows needs number\n");
ep->par[9] = atoi(av[0]);
(*ac)--; av++;
break;
default:
printf("%s is invalid parameter\n", av[-1]);
}
}
break;
}
return 0;
}
#endif
/*
* configuration of pipes, schedulers, flowsets.
* When we configure a new scheduler, an empty pipe is created, so:
*
* do_pipe = 1 -> "pipe N config ..." only for backward compatibility
* sched N+Delta type fifo sched_mask ...
* pipe N+Delta <parameters>
* flowset N+Delta pipe N+Delta (no parameters)
* sched N type wf2q+ sched_mask ...
* pipe N <parameters>
*
* do_pipe = 2 -> flowset N config
* flowset N parameters
*
* do_pipe = 3 -> sched N config
* sched N parameters (default no pipe)
* optional Pipe N config ...
* pipe ==>
*/
void
ipfw_config_pipe(int ac, char **av)
{
int i;
u_int j;
char *end;
struct dn_id *buf, *base;
struct dn_sch *sch = NULL;
struct dn_link *p = NULL;
struct dn_fs *fs = NULL;
struct dn_profile *pf = NULL;
struct ipfw_flow_id *mask = NULL;
#ifdef NEW_AQM
struct dn_extra_parms *aqm_extra;
struct dn_extra_parms *sch_extra;
int lmax_extra;
#endif
int lmax;
uint32_t _foo = 0, *flags = &_foo , *buckets = &_foo;
/*
* allocate space for 1 header,
* 1 scheduler, 1 link, 1 flowset, 1 profile
*/
lmax = sizeof(struct dn_id); /* command header */
lmax += sizeof(struct dn_sch) + sizeof(struct dn_link) +
sizeof(struct dn_fs) + sizeof(struct dn_profile);
#ifdef NEW_AQM
/* Extra Params */
lmax_extra = sizeof(struct dn_extra_parms);
/* two lmax_extra because one for AQM params and another
* sch params
*/
lmax += lmax_extra*2;
#endif
av++; ac--;
/* Pipe number */
if (ac && isdigit(**av)) {
i = atoi(*av); av++; ac--;
} else
i = -1;
if (i <= 0)
errx(EX_USAGE, "need a pipe/flowset/sched number");
base = buf = safe_calloc(1, lmax);
/* all commands start with a 'CONFIGURE' and a version */
o_next(&buf, sizeof(struct dn_id), DN_CMD_CONFIG);
base->id = DN_API_VERSION;
switch (co.do_pipe) {
case 1: /* "pipe N config ..." */
/* Allocate space for the WF2Q+ scheduler, its link
* and the FIFO flowset. Set the number, but leave
* the scheduler subtype and other parameters to 0
* so the kernel will use appropriate defaults.
* XXX todo: add a flag to record if a parameter
* is actually configured.
* If we do a 'pipe config' mask -> sched_mask.
* The FIFO scheduler and link are derived from the
* WF2Q+ one in the kernel.
*/
#ifdef NEW_AQM
sch_extra = o_next(&buf, lmax_extra, DN_TEXT);
sch_extra ->oid.subtype = 0; /* don't configure scheduler */
#endif
sch = o_next(&buf, sizeof(*sch), DN_SCH);
p = o_next(&buf, sizeof(*p), DN_LINK);
#ifdef NEW_AQM
aqm_extra = o_next(&buf, lmax_extra, DN_TEXT);
aqm_extra ->oid.subtype = 0; /* don't configure AQM */
#endif
fs = o_next(&buf, sizeof(*fs), DN_FS);
sch->sched_nr = i;
sch->oid.subtype = 0; /* defaults to WF2Q+ */
mask = &sch->sched_mask;
flags = &sch->flags;
buckets = &sch->buckets;
*flags |= DN_PIPE_CMD;
p->link_nr = i;
/* This flowset is only for the FIFO scheduler */
fs->fs_nr = i + 2*DN_MAX_ID;
fs->sched_nr = i + DN_MAX_ID;
break;
case 2: /* "queue N config ... " */
#ifdef NEW_AQM
aqm_extra = o_next(&buf, lmax_extra, DN_TEXT);
aqm_extra ->oid.subtype = 0;
#endif
fs = o_next(&buf, sizeof(*fs), DN_FS);
fs->fs_nr = i;
mask = &fs->flow_mask;
flags = &fs->flags;
buckets = &fs->buckets;
break;
case 3: /* "sched N config ..." */
#ifdef NEW_AQM
sch_extra = o_next(&buf, lmax_extra, DN_TEXT);
sch_extra ->oid.subtype = 0;
#endif
sch = o_next(&buf, sizeof(*sch), DN_SCH);
#ifdef NEW_AQM
aqm_extra = o_next(&buf, lmax_extra, DN_TEXT);
aqm_extra ->oid.subtype = 0;
#endif
fs = o_next(&buf, sizeof(*fs), DN_FS);
sch->sched_nr = i;
mask = &sch->sched_mask;
flags = &sch->flags;
buckets = &sch->buckets;
/* fs is used only with !MULTIQUEUE schedulers */
fs->fs_nr = i + DN_MAX_ID;
fs->sched_nr = i;
break;
}
/* set to -1 those fields for which we want to reuse existing
* values from the kernel.
* Also, *_nr and subtype = 0 mean reuse the value from the kernel.
* XXX todo: support reuse of the mask.
*/
if (p)
p->bandwidth = -1;
for (j = 0; j < sizeof(fs->par)/sizeof(fs->par[0]); j++)
fs->par[j] = -1;
while (ac > 0) {
double d;
int tok = match_token(dummynet_params, *av);
ac--; av++;
switch(tok) {
case TOK_NOERROR:
NEED(fs, "noerror is only for pipes");
fs->flags |= DN_NOERROR;
break;
case TOK_PLR:
NEED(fs, "plr is only for pipes");
NEED1("plr needs argument 0..1\n");
d = strtod(av[0], NULL);
if (d > 1)
d = 1;
else if (d < 0)
d = 0;
fs->plr = (int)(d*0x7fffffff);
ac--; av++;
break;
case TOK_QUEUE:
NEED(fs, "queue is only for pipes or flowsets");
NEED1("queue needs queue size\n");
end = NULL;
fs->qsize = strtoul(av[0], &end, 0);
if (*end == 'K' || *end == 'k') {
fs->flags |= DN_QSIZE_BYTES;
fs->qsize *= 1024;
} else if (*end == 'B' ||
_substrcmp2(end, "by", "bytes") == 0) {
fs->flags |= DN_QSIZE_BYTES;
}
ac--; av++;
break;
case TOK_BUCKETS:
NEED(fs, "buckets is only for pipes or flowsets");
NEED1("buckets needs argument\n");
*buckets = strtoul(av[0], NULL, 0);
ac--; av++;
break;
case TOK_FLOW_MASK:
case TOK_SCHED_MASK:
case TOK_MASK:
NEED(mask, "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
*/
bzero(mask, sizeof(*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
* except 'extra' (the queue number)
*/
mask->dst_ip = ~0;
mask->src_ip = ~0;
mask->dst_port = ~0;
mask->src_port = ~0;
mask->proto = ~0;
n2mask(&mask->dst_ip6, 128);
n2mask(&mask->src_ip6, 128);
mask->flow_id6 = ~0;
*flags |= DN_HAVE_MASK;
goto end_mask;
case TOK_QUEUE:
mask->extra = ~0;
*flags |= DN_HAVE_MASK;
goto end_mask;
case TOK_DSTIP:
mask->addr_type = 4;
p32 = &mask->dst_ip;
break;
case TOK_SRCIP:
mask->addr_type = 4;
p32 = &mask->src_ip;
break;
case TOK_DSTIP6:
mask->addr_type = 6;
pa6 = &mask->dst_ip6;
break;
case TOK_SRCIP6:
mask->addr_type = 6;
pa6 = &mask->src_ip6;
break;
case TOK_FLOWID:
mask->addr_type = 6;
p20 = &mask->flow_id6;
break;
case TOK_DSTPORT:
p16 = &mask->dst_port;
break;
case TOK_SRCPORT:
p16 = &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");
mask->proto = (uint8_t)a;
}
if (a != 0)
*flags |= DN_HAVE_MASK;
ac--; av++;
} /* end while, config masks */
end_mask:
break;
#ifdef NEW_AQM
case TOK_CODEL:
case TOK_PIE:
NEED(fs, "codel/pie is only for flowsets");
fs->flags &= ~(DN_IS_RED|DN_IS_GENTLE_RED);
fs->flags |= DN_IS_AQM;
strlcpy(aqm_extra->name, av[-1],
sizeof(aqm_extra->name));
aqm_extra->oid.subtype = DN_AQM_PARAMS;
process_extra_parms(&ac, av, aqm_extra, tok);
break;
case TOK_FQ_CODEL:
case TOK_FQ_PIE:
if (!strcmp(av[-1],"type"))
errx(EX_DATAERR, "use type before fq_codel/fq_pie");
NEED(sch, "fq_codel/fq_pie is only for schd");
strlcpy(sch_extra->name, av[-1],
sizeof(sch_extra->name));
sch_extra->oid.subtype = DN_SCH_PARAMS;
process_extra_parms(&ac, av, sch_extra, tok);
break;
#endif
case TOK_RED:
case TOK_GRED:
NEED1("red/gred needs w_q/min_th/max_th/max_p\n");
fs->flags |= DN_IS_RED;
if (tok == TOK_GRED)
fs->flags |= 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");
fs->w_q = (int) (w_q * (1 << SCALE_RED));
}
if ((end = strsep(&av[0], "/"))) {
fs->min_th = strtoul(end, &end, 0);
if (*end == 'K' || *end == 'k')
fs->min_th *= 1024;
}
if ((end = strsep(&av[0], "/"))) {
fs->max_th = strtoul(end, &end, 0);
if (*end == 'K' || *end == 'k')
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");
fs->max_p = (int)(max_p * (1 << SCALE_RED));
}
ac--; av++;
break;
case TOK_ECN:
fs->flags |= DN_IS_ECN;
break;
case TOK_DROPTAIL:
NEED(fs, "droptail is only for flowsets");
fs->flags &= ~(DN_IS_RED|DN_IS_GENTLE_RED);
break;
case TOK_BW:
NEED(p, "bw is only for links");
NEED1("bw needs bandwidth or interface\n");
read_bandwidth(av[0], &p->bandwidth, NULL, 0);
ac--; av++;
break;
case TOK_DELAY:
NEED(p, "delay is only for links");
NEED1("delay needs argument 0..10000ms\n");
p->delay = strtoul(av[0], NULL, 0);
ac--; av++;
break;
case TOK_TYPE: {
int l;
NEED(sch, "type is only for schedulers");
NEED1("type needs a string");
l = strlen(av[0]);
if (l == 0 || l > 15)
errx(1, "type %s too long\n", av[0]);
strlcpy(sch->name, av[0], sizeof(sch->name));
sch->oid.subtype = 0; /* use string */
#ifdef NEW_AQM
/* if fq_codel is selected, consider all tokens after it
* as parameters
*/
if (!strcasecmp(av[0],"fq_codel") || !strcasecmp(av[0],"fq_pie")){
strlcpy(sch_extra->name, av[0],
sizeof(sch_extra->name));
sch_extra->oid.subtype = DN_SCH_PARAMS;
process_extra_parms(&ac, av, sch_extra, tok);
} else {
ac--;av++;
}
#else
ac--;av++;
#endif
break;
}
case TOK_WEIGHT:
NEED(fs, "weight is only for flowsets");
NEED1("weight needs argument\n");
fs->par[0] = strtol(av[0], &end, 0);
ac--; av++;
break;
case TOK_LMAX:
NEED(fs, "lmax is only for flowsets");
NEED1("lmax needs argument\n");
fs->par[1] = strtol(av[0], &end, 0);
ac--; av++;
break;
case TOK_PRI:
NEED(fs, "priority is only for flowsets");
NEED1("priority needs argument\n");
fs->par[2] = strtol(av[0], &end, 0);
ac--; av++;
break;
case TOK_SCHED:
case TOK_PIPE:
NEED(fs, "pipe/sched");
NEED1("pipe/link/sched needs number\n");
fs->sched_nr = strtoul(av[0], &end, 0);
ac--; av++;
break;
case TOK_PROFILE:
NEED((!pf), "profile already set");
NEED(p, "profile");
{
NEED1("extra delay needs the file name\n");
pf = o_next(&buf, sizeof(*pf), DN_PROFILE);
load_extra_delays(av[0], pf, p); //XXX can't fail?
--ac; ++av;
}
break;
case TOK_BURST:
NEED(p, "burst");
NEED1("burst needs argument\n");
errno = 0;
if (expand_number(av[0], &p->burst) < 0)
if (errno != ERANGE)
errx(EX_DATAERR,
"burst: invalid argument");
if (errno || p->burst > (1ULL << 48) - 1)
errx(EX_DATAERR,
"burst: out of range (0..2^48-1)");
ac--; av++;
break;
default:
errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]);
}
}
/* check validity of parameters */
if (p) {
if (p->delay > 10000)
errx(EX_DATAERR, "delay must be < 10000");
if (p->bandwidth == -1)
p->bandwidth = 0;
}
if (fs) {
/* XXX accept a 0 scheduler to keep the default */
if (fs->flags & DN_QSIZE_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 (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 (fs->qsize > limit)
errx(EX_DATAERR, "2 <= queue size <= %ld", limit);
}
#ifdef NEW_AQM
if ((fs->flags & DN_IS_ECN) && !((fs->flags & DN_IS_RED)||
(fs->flags & DN_IS_AQM)))
errx(EX_USAGE, "ECN can be used with red/gred/"
"codel/fq_codel only!");
#else
if ((fs->flags & DN_IS_ECN) && !(fs->flags & DN_IS_RED))
errx(EX_USAGE, "enable red/gred for ECN");
#endif
if (fs->flags & DN_IS_RED) {
size_t len;
int lookup_depth, avg_pkt_size;
if (!(fs->flags & DN_IS_ECN) && (fs->min_th >= fs->max_th))
errx(EX_DATAERR, "min_th %d must be < than max_th %d",
fs->min_th, fs->max_th);
else if ((fs->flags & DN_IS_ECN) && (fs->min_th > fs->max_th))
errx(EX_DATAERR, "min_th %d must be =< than max_th %d",
fs->min_th, fs->max_th);
if (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)
lookup_depth = 256;
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)
avg_pkt_size = 512;
if (avg_pkt_size == 0)
errx(EX_DATAERR,
"net.inet.ip.dummynet.red_avg_pkt_size must"
" be greater than zero");
#if 0 /* the following computation is now done in the kernel */
/*
* 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)fs->w_q) / (1 << SCALE_RED);
idle = s * 3. / w_q;
fs->lookup_step = (int)idle / lookup_depth;
if (!fs->lookup_step)
fs->lookup_step = 1;
weight = 1 - w_q;
for (t = fs->lookup_step; t > 1; --t)
weight *= 1 - w_q;
fs->lookup_weight = (int)(weight * (1 << SCALE_RED));
#endif /* code moved in the kernel */
}
}
i = do_cmd(IP_DUMMYNET3, base, (char *)buf - (char *)base);
if (i)
err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE");
}
void
dummynet_flush(void)
{
struct dn_id oid;
oid_fill(&oid, sizeof(oid), DN_CMD_FLUSH, DN_API_VERSION);
do_cmd(IP_DUMMYNET3, &oid, oid.len);
}
/* Parse input for 'ipfw [pipe|sched|queue] show [range list]'
* Returns the number of ranges, and possibly stores them
* in the array v of size len.
*/
static int
parse_range(int ac, char *av[], uint32_t *v, int len)
{
int n = 0;
char *endptr, *s;
uint32_t base[2];
if (v == NULL || len < 2) {
v = base;
len = 2;
}
for (s = *av; s != NULL; av++, ac--) {
v[0] = strtoul(s, &endptr, 10);
v[1] = (*endptr != '-') ? v[0] :
strtoul(endptr+1, &endptr, 10);
if (*endptr == '\0') { /* prepare for next round */
s = (ac > 0) ? *(av+1) : NULL;
} else {
if (*endptr != ',') {
warn("invalid number: %s", s);
s = ++endptr;
continue;
}
/* continue processing from here */
s = ++endptr;
ac++;
av--;
}
if (v[1] < v[0] ||
v[0] >= DN_MAX_ID-1 ||
v[1] >= DN_MAX_ID-1) {
continue; /* invalid entry */
}
n++;
/* translate if 'pipe list' */
if (co.do_pipe == 1) {
v[0] += DN_MAX_ID;
v[1] += DN_MAX_ID;
}
v = (n*2 < len) ? v + 2 : base;
}
return n;
}
/* main entry point for dummynet list functions. co.do_pipe indicates
* which function we want to support.
* av may contain filtering arguments, either individual entries
* or ranges, or lists (space or commas are valid separators).
* Format for a range can be n1-n2 or n3 n4 n5 ...
* In a range n1 must be <= n2, otherwise the range is ignored.
* A number 'n4' is translate in a range 'n4-n4'
* All number must be > 0 and < DN_MAX_ID-1
*/
void
dummynet_list(int ac, char *av[], int show_counters)
{
struct dn_id *oid, *x = NULL;
int ret, i;
int n; /* # of ranges */
u_int buflen, l;
u_int max_size; /* largest obj passed up */
(void)show_counters; // XXX unused, but we should use it.
ac--;
av++; /* skip 'list' | 'show' word */
n = parse_range(ac, av, NULL, 0); /* Count # of ranges. */
/* Allocate space to store ranges */
l = sizeof(*oid) + sizeof(uint32_t) * n * 2;
oid = safe_calloc(1, l);
oid_fill(oid, l, DN_CMD_GET, DN_API_VERSION);
if (n > 0) /* store ranges in idx */
parse_range(ac, av, (uint32_t *)(oid + 1), n*2);
/*
* Compute the size of the largest object returned. If the
* response leaves at least this much spare space in the
* buffer, then surely the response is complete; otherwise
* there might be a risk of truncation and we will need to
* retry with a larger buffer.
* XXX don't bother with smaller structs.
*/
max_size = sizeof(struct dn_fs);
if (max_size < sizeof(struct dn_sch))
max_size = sizeof(struct dn_sch);
if (max_size < sizeof(struct dn_flow))
max_size = sizeof(struct dn_flow);
switch (co.do_pipe) {
case 1:
oid->subtype = DN_LINK; /* list pipe */
break;
case 2:
oid->subtype = DN_FS; /* list queue */
break;
case 3:
oid->subtype = DN_SCH; /* list sched */
break;
}
/*
* Ask the kernel an estimate of the required space (result
* in oid.id), unless we are requesting a subset of objects,
* in which case the kernel does not give an exact answer.
* In any case, space might grow in the meantime due to the
* creation of new queues, so we must be prepared to retry.
*/
if (n > 0) {
buflen = 4*1024;
} else {
ret = do_cmd(-IP_DUMMYNET3, oid, (uintptr_t)&l);
if (ret != 0 || oid->id <= sizeof(*oid))
goto done;
buflen = oid->id + max_size;
oid->len = sizeof(*oid); /* restore */
}
/* Try a few times, until the buffer fits */
for (i = 0; i < 20; i++) {
l = buflen;
x = safe_realloc(x, l);
bcopy(oid, x, oid->len);
ret = do_cmd(-IP_DUMMYNET3, x, (uintptr_t)&l);
if (ret != 0 || x->id <= sizeof(*oid))
goto done; /* no response */
if (l + max_size <= buflen)
break; /* ok */
buflen *= 2; /* double for next attempt */
}
list_pipes(x, O_NEXT(x, l));
done:
if (x)
free(x);
free(oid);
}
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