The filtering of the output is done in the kernel instead of userland to reduce the amount of data transfered.
1376 lines
34 KiB
C
1376 lines
34 KiB
C
/*
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* Copyright (c) 2002-2003,2010 Luigi Rizzo
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*
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* Redistribution and use in source forms, with and without modification,
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* are permitted provided that this entire comment appears intact.
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*
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* Redistribution in binary form may occur without any restrictions.
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* Obviously, it would be nice if you gave credit where credit is due
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* but requiring it would be too onerous.
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*
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* This software is provided ``AS IS'' without any warranties of any kind.
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*
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* $FreeBSD$
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*
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* dummynet support
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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/* XXX there are several sysctl leftover here */
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#include <sys/sysctl.h>
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#include "ipfw2.h"
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <libutil.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sysexits.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/ip_fw.h>
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#include <netinet/ip_dummynet.h>
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#include <arpa/inet.h> /* inet_ntoa */
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static struct _s_x dummynet_params[] = {
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{ "plr", TOK_PLR },
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{ "noerror", TOK_NOERROR },
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{ "buckets", TOK_BUCKETS },
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{ "dst-ip", TOK_DSTIP },
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{ "src-ip", TOK_SRCIP },
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{ "dst-port", TOK_DSTPORT },
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{ "src-port", TOK_SRCPORT },
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{ "proto", TOK_PROTO },
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{ "weight", TOK_WEIGHT },
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{ "lmax", TOK_LMAX },
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{ "maxlen", TOK_LMAX },
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{ "all", TOK_ALL },
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{ "mask", TOK_MASK }, /* alias for both */
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{ "sched_mask", TOK_SCHED_MASK },
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{ "flow_mask", TOK_FLOW_MASK },
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{ "droptail", TOK_DROPTAIL },
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{ "red", TOK_RED },
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{ "gred", TOK_GRED },
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{ "bw", TOK_BW },
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{ "bandwidth", TOK_BW },
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{ "delay", TOK_DELAY },
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{ "link", TOK_LINK },
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{ "pipe", TOK_PIPE },
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{ "queue", TOK_QUEUE },
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{ "flowset", TOK_FLOWSET },
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{ "sched", TOK_SCHED },
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{ "pri", TOK_PRI },
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{ "priority", TOK_PRI },
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{ "type", TOK_TYPE },
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{ "flow-id", TOK_FLOWID},
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{ "dst-ipv6", TOK_DSTIP6},
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{ "dst-ip6", TOK_DSTIP6},
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{ "src-ipv6", TOK_SRCIP6},
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{ "src-ip6", TOK_SRCIP6},
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{ "profile", TOK_PROFILE},
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{ "burst", TOK_BURST},
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{ "dummynet-params", TOK_NULL },
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{ NULL, 0 } /* terminator */
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};
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#define O_NEXT(p, len) ((void *)((char *)p + len))
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static void
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oid_fill(struct dn_id *oid, int len, int type, uintptr_t id)
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{
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oid->len = len;
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oid->type = type;
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oid->subtype = 0;
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oid->id = id;
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}
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/* make room in the buffer and move the pointer forward */
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static void *
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o_next(struct dn_id **o, int len, int type)
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{
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struct dn_id *ret = *o;
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oid_fill(ret, len, type, 0);
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*o = O_NEXT(*o, len);
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return ret;
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}
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#if 0
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static int
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sort_q(void *arg, const void *pa, const void *pb)
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{
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int rev = (co.do_sort < 0);
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int field = rev ? -co.do_sort : co.do_sort;
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long long res = 0;
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const struct dn_flow_queue *a = pa;
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const struct dn_flow_queue *b = pb;
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switch (field) {
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case 1: /* pkts */
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res = a->len - b->len;
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break;
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case 2: /* bytes */
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res = a->len_bytes - b->len_bytes;
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break;
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case 3: /* tot pkts */
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res = a->tot_pkts - b->tot_pkts;
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break;
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case 4: /* tot bytes */
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res = a->tot_bytes - b->tot_bytes;
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break;
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}
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if (res < 0)
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res = -1;
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if (res > 0)
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res = 1;
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return (int)(rev ? res : -res);
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}
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#endif
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/* print a mask and header for the subsequent list of flows */
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static void
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print_mask(struct ipfw_flow_id *id)
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{
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if (!IS_IP6_FLOW_ID(id)) {
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printf(" "
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"mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n",
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id->proto,
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id->src_ip, id->src_port,
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id->dst_ip, id->dst_port);
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printf("BKT Prot ___Source IP/port____ "
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"____Dest. IP/port____ "
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"Tot_pkt/bytes Pkt/Byte Drp\n");
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} else {
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char buf[255];
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printf("\n mask: proto: 0x%02x, flow_id: 0x%08x, ",
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id->proto, id->flow_id6);
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inet_ntop(AF_INET6, &(id->src_ip6), buf, sizeof(buf));
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printf("%s/0x%04x -> ", buf, id->src_port);
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inet_ntop(AF_INET6, &(id->dst_ip6), buf, sizeof(buf));
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printf("%s/0x%04x\n", buf, id->dst_port);
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printf("BKT ___Prot___ _flow-id_ "
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"______________Source IPv6/port_______________ "
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"_______________Dest. IPv6/port_______________ "
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"Tot_pkt/bytes Pkt/Byte Drp\n");
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}
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}
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static void
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list_flow(struct dn_flow *ni)
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{
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char buff[255];
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struct protoent *pe;
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struct in_addr ina;
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struct ipfw_flow_id *id = &ni->fid;
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pe = getprotobynumber(id->proto);
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/* XXX: Should check for IPv4 flows */
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printf("%3u ", (ni->oid.id) & 0xff);
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if (!IS_IP6_FLOW_ID(id)) {
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if (pe)
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printf("%-4s ", pe->p_name);
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else
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printf("%4u ", id->proto);
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ina.s_addr = htonl(id->src_ip);
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printf("%15s/%-5d ",
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inet_ntoa(ina), id->src_port);
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ina.s_addr = htonl(id->dst_ip);
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printf("%15s/%-5d ",
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inet_ntoa(ina), id->dst_port);
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} else {
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/* Print IPv6 flows */
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if (pe != NULL)
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printf("%9s ", pe->p_name);
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else
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printf("%9u ", id->proto);
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printf("%7d %39s/%-5d ", id->flow_id6,
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inet_ntop(AF_INET6, &(id->src_ip6), buff, sizeof(buff)),
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id->src_port);
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printf(" %39s/%-5d ",
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inet_ntop(AF_INET6, &(id->dst_ip6), buff, sizeof(buff)),
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id->dst_port);
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}
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printf("%4llu %8llu %2u %4u %3u\n",
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align_uint64(&ni->tot_pkts),
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align_uint64(&ni->tot_bytes),
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ni->length, ni->len_bytes, ni->drops);
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}
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static void
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print_flowset_parms(struct dn_fs *fs, char *prefix)
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{
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int l;
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char qs[30];
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char plr[30];
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char red[90]; /* Display RED parameters */
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l = fs->qsize;
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if (fs->flags & DN_QSIZE_BYTES) {
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if (l >= 8192)
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sprintf(qs, "%d KB", l / 1024);
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else
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sprintf(qs, "%d B", l);
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} else
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sprintf(qs, "%3d sl.", l);
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if (fs->plr)
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sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff));
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else
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plr[0] = '\0';
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if (fs->flags & DN_IS_RED) /* RED parameters */
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sprintf(red,
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"\n\t %cRED w_q %f min_th %d max_th %d max_p %f",
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(fs->flags & DN_IS_GENTLE_RED) ? 'G' : ' ',
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1.0 * fs->w_q / (double)(1 << SCALE_RED),
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fs->min_th,
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fs->max_th,
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1.0 * fs->max_p / (double)(1 << SCALE_RED));
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else
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sprintf(red, "droptail");
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if (prefix[0]) {
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printf("%s %s%s %d queues (%d buckets) %s\n",
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prefix, qs, plr, fs->oid.id, fs->buckets, red);
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prefix[0] = '\0';
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} else {
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printf("q%05d %s%s %d flows (%d buckets) sched %d "
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"weight %d lmax %d pri %d %s\n",
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fs->fs_nr, qs, plr, fs->oid.id, fs->buckets,
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fs->sched_nr, fs->par[0], fs->par[1], fs->par[2], red);
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if (fs->flags & DN_HAVE_MASK)
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print_mask(&fs->flow_mask);
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}
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}
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static void
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print_extra_delay_parms(struct dn_profile *p)
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{
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double loss;
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if (p->samples_no <= 0)
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return;
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loss = p->loss_level;
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loss /= p->samples_no;
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printf("\t profile: name \"%s\" loss %f samples %d\n",
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p->name, loss, p->samples_no);
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}
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static void
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flush_buf(char *buf)
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{
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if (buf[0])
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printf("%s\n", buf);
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buf[0] = '\0';
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}
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/*
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* generic list routine. We expect objects in a specific order, i.e.
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* PIPES AND SCHEDULERS:
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* link; scheduler; internal flowset if any; instances
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* we can tell a pipe from the number.
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*
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* FLOWSETS:
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* flowset; queues;
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* link i (int queue); scheduler i; si(i) { flowsets() : queues }
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*/
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static void
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list_pipes(struct dn_id *oid, struct dn_id *end)
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{
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char buf[160]; /* pending buffer */
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buf[0] = '\0';
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for (; oid != end; oid = O_NEXT(oid, oid->len)) {
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if (oid->len < sizeof(*oid))
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errx(1, "invalid oid len %d\n", oid->len);
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switch (oid->type) {
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default:
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flush_buf(buf);
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printf("unrecognized object %d size %d\n", oid->type, oid->len);
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break;
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case DN_TEXT: /* list of attached flowsets */
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{
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int i, l;
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struct {
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struct dn_id id;
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uint32_t p[0];
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} *d = (void *)oid;
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l = (oid->len - sizeof(*oid))/sizeof(d->p[0]);
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if (l == 0)
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break;
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printf(" Children flowsets: ");
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for (i = 0; i < l; i++)
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printf("%u ", d->p[i]);
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printf("\n");
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break;
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}
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case DN_CMD_GET:
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if (co.verbose)
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printf("answer for cmd %d, len %d\n", oid->type, oid->id);
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break;
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case DN_SCH: {
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struct dn_sch *s = (struct dn_sch *)oid;
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flush_buf(buf);
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printf(" sched %d type %s flags 0x%x %d buckets %d active\n",
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s->sched_nr,
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s->name, s->flags, s->buckets, s->oid.id);
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if (s->flags & DN_HAVE_MASK)
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print_mask(&s->sched_mask);
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}
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break;
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case DN_FLOW:
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list_flow((struct dn_flow *)oid);
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break;
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case DN_LINK: {
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struct dn_link *p = (struct dn_link *)oid;
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double b = p->bandwidth;
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char bwbuf[30];
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char burst[5 + 7];
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/* This starts a new object so flush buffer */
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flush_buf(buf);
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/* data rate */
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if (b == 0)
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sprintf(bwbuf, "unlimited ");
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else if (b >= 1000000)
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sprintf(bwbuf, "%7.3f Mbit/s", b/1000000);
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else if (b >= 1000)
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sprintf(bwbuf, "%7.3f Kbit/s", b/1000);
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else
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sprintf(bwbuf, "%7.3f bit/s ", b);
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if (humanize_number(burst, sizeof(burst), p->burst,
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"", HN_AUTOSCALE, 0) < 0 || co.verbose)
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sprintf(burst, "%d", (int)p->burst);
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sprintf(buf, "%05d: %s %4d ms burst %s",
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p->link_nr % DN_MAX_ID, bwbuf, p->delay, burst);
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}
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break;
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case DN_FS:
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print_flowset_parms((struct dn_fs *)oid, buf);
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break;
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case DN_PROFILE:
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flush_buf(buf);
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print_extra_delay_parms((struct dn_profile *)oid);
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}
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flush_buf(buf); // XXX does it really go here ?
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}
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}
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/*
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* Delete pipe, queue or scheduler i
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*/
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int
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ipfw_delete_pipe(int do_pipe, int i)
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{
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struct {
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struct dn_id oid;
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uintptr_t a[1]; /* add more if we want a list */
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} cmd;
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oid_fill((void *)&cmd, sizeof(cmd), DN_CMD_DELETE, DN_API_VERSION);
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cmd.oid.subtype = (do_pipe == 1) ? DN_LINK :
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( (do_pipe == 2) ? DN_FS : DN_SCH);
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cmd.a[0] = i;
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i = do_cmd(IP_DUMMYNET3, &cmd, cmd.oid.len);
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if (i) {
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i = 1;
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warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", i);
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}
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return i;
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}
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/*
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* Code to parse delay profiles.
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*
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* Some link types introduce extra delays in the transmission
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* of a packet, e.g. because of MAC level framing, contention on
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* the use of the channel, MAC level retransmissions and so on.
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* From our point of view, the channel is effectively unavailable
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* for this extra time, which is constant or variable depending
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* on the link type. Additionally, packets may be dropped after this
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* time (e.g. on a wireless link after too many retransmissions).
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* We can model the additional delay with an empirical curve
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* that represents its distribution.
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*
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* cumulative probability
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* 1.0 ^
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* |
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* L +-- loss-level x
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* | ******
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* | *
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* | *****
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* | *
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* | **
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* | *
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* +-------*------------------->
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* delay
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*
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* The empirical curve may have both vertical and horizontal lines.
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* Vertical lines represent constant delay for a range of
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* probabilities; horizontal lines correspond to a discontinuty
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* in the delay distribution: the link will use the largest delay
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* for a given probability.
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*
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* To pass the curve to dummynet, we must store the parameters
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* in a file as described below, and issue the command
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*
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* ipfw pipe <n> config ... bw XXX profile <filename> ...
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*
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* The file format is the following, with whitespace acting as
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* a separator and '#' indicating the beginning a comment:
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*
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* samples N
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* the number of samples used in the internal
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* representation (2..1024; default 100);
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*
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* loss-level L
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* The probability above which packets are lost.
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* (0.0 <= L <= 1.0, default 1.0 i.e. no loss);
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*
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* name identifier
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* Optional a name (listed by "ipfw pipe show")
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* to identify the distribution;
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*
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* "delay prob" | "prob delay"
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* One of these two lines is mandatory and defines
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* the format of the following lines with data points.
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*
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* XXX YYY
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* 2 or more lines representing points in the curve,
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* with either delay or probability first, according
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* to the chosen format.
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* The unit for delay is milliseconds.
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*
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* Data points does not need to be ordered or equal to the number
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* specified in the "samples" line. ipfw will sort and interpolate
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* the curve as needed.
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*
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* Example of a profile file:
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name bla_bla_bla
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samples 100
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loss-level 0.86
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prob delay
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0 200 # minimum overhead is 200ms
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0.5 200
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0.5 300
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0.8 1000
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0.9 1300
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1 1300
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* Internally, we will convert the curve to a fixed number of
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* samples, and when it is time to transmit a packet we will
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* model the extra delay as extra bits in the packet.
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*
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*/
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#define ED_MAX_LINE_LEN 256+ED_MAX_NAME_LEN
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#define ED_TOK_SAMPLES "samples"
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#define ED_TOK_LOSS "loss-level"
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#define ED_TOK_NAME "name"
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#define ED_TOK_DELAY "delay"
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#define ED_TOK_PROB "prob"
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#define ED_TOK_BW "bw"
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#define ED_SEPARATORS " \t\n"
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#define ED_MIN_SAMPLES_NO 2
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|
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/*
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* returns 1 if s is a non-negative number, with at least one '.'
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*/
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static int
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is_valid_number(const char *s)
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{
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int i, dots_found = 0;
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int len = strlen(s);
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|
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for (i = 0; i<len; ++i)
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if (!isdigit(s[i]) && (s[i] !='.' || ++dots_found > 1))
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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 */
|
|
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 (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);
|
|
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);
|
|
}
|
|
}
|
|
|
|
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;
|
|
strncpy(p->name, profile_name, sizeof(p->name));
|
|
}
|
|
|
|
/*
|
|
* 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, j;
|
|
char *end;
|
|
void *par = NULL;
|
|
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;
|
|
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);
|
|
|
|
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.
|
|
*/
|
|
sch = o_next(&buf, sizeof(*sch), DN_SCH);
|
|
p = o_next(&buf, sizeof(*p), DN_LINK);
|
|
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 ... " */
|
|
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 ..." */
|
|
sch = o_next(&buf, sizeof(*sch), DN_SCH);
|
|
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
|
|
*/
|
|
par = NULL;
|
|
|
|
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
|
|
*/
|
|
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_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");
|
|
fs->flow_mask.proto = (uint8_t)a;
|
|
}
|
|
if (a != 0)
|
|
*flags |= DN_HAVE_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");
|
|
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_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]);
|
|
strcpy(sch->name, av[0]);
|
|
sch->oid.subtype = 0; /* use string */
|
|
ac--; av++;
|
|
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], (int64_t *)&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);
|
|
}
|
|
|
|
if (fs->flags & DN_IS_RED) {
|
|
size_t len;
|
|
int lookup_depth, avg_pkt_size;
|
|
double w_q;
|
|
|
|
if (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");
|
|
|
|
/*
|
|
* 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 0
|
|
if (p.bandwidth==0) /* this is a WF2Q+ queue */
|
|
s = 0;
|
|
else
|
|
s = (double)ck.hz * avg_pkt_size * 8 / p.bandwidth;
|
|
#endif
|
|
/*
|
|
* 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);
|
|
#if 0 // go in kernel
|
|
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
|
|
}
|
|
}
|
|
|
|
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[1] < 0 || v[1] >= DN_MAX_ID-1 ||
|
|
v[0] < 0 || 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, l;
|
|
int n; /* # of ranges */
|
|
int buflen;
|
|
int max_size; /* largest obj passed up */
|
|
|
|
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);
|
|
}
|