442f849547
(LCP/CCP/IPCP), one for urgent IP traffic and one for everything else. o Add the ``set urgent'' command for adjusting the list of urgent port numbers. The default urgent ports are 21, 22, 23, 513, 514, 543 and 544 (Ports 80 and 81 have been removed from the default priority list). o Increase the buffered packet threshold from 20 to 30. o Report the number of packets in the IP output queue and the list of urgent ports under ``show ipcp''.
441 lines
14 KiB
C
441 lines
14 KiB
C
/*
|
|
* PPP Line Quality Monitoring (LQM) Module
|
|
*
|
|
* Written by Toshiharu OHNO (tony-o@iij.ad.jp)
|
|
*
|
|
* Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
|
|
*
|
|
* Redistribution and use in source and binary forms are permitted
|
|
* provided that the above copyright notice and this paragraph are
|
|
* duplicated in all such forms and that any documentation,
|
|
* advertising materials, and other materials related to such
|
|
* distribution and use acknowledge that the software was developed
|
|
* by the Internet Initiative Japan, Inc. The name of the
|
|
* IIJ may not be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
*
|
|
* $FreeBSD$
|
|
*
|
|
* o LQR based on RFC1333
|
|
*
|
|
* TODO:
|
|
* o LQM policy
|
|
* o Allow user to configure LQM method and interval.
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/un.h>
|
|
|
|
#include <string.h>
|
|
#include <termios.h>
|
|
|
|
#include "layer.h"
|
|
#include "mbuf.h"
|
|
#include "log.h"
|
|
#include "defs.h"
|
|
#include "timer.h"
|
|
#include "fsm.h"
|
|
#include "acf.h"
|
|
#include "proto.h"
|
|
#include "lcp.h"
|
|
#include "lqr.h"
|
|
#include "hdlc.h"
|
|
#include "async.h"
|
|
#include "throughput.h"
|
|
#include "ccp.h"
|
|
#include "link.h"
|
|
#include "descriptor.h"
|
|
#include "physical.h"
|
|
#include "mp.h"
|
|
#include "chat.h"
|
|
#include "auth.h"
|
|
#include "chap.h"
|
|
#include "command.h"
|
|
#include "cbcp.h"
|
|
#include "datalink.h"
|
|
|
|
struct echolqr {
|
|
u_int32_t magic;
|
|
u_int32_t signature;
|
|
u_int32_t sequence;
|
|
};
|
|
|
|
#define SIGNATURE 0x594e4f54
|
|
|
|
static void
|
|
SendEchoReq(struct lcp *lcp)
|
|
{
|
|
struct hdlc *hdlc = &link2physical(lcp->fsm.link)->hdlc;
|
|
struct echolqr echo;
|
|
|
|
echo.magic = htonl(lcp->want_magic);
|
|
echo.signature = htonl(SIGNATURE);
|
|
echo.sequence = htonl(hdlc->lqm.echo.seq_sent);
|
|
fsm_Output(&lcp->fsm, CODE_ECHOREQ, hdlc->lqm.echo.seq_sent++,
|
|
(u_char *)&echo, sizeof echo, MB_ECHOOUT);
|
|
}
|
|
|
|
struct mbuf *
|
|
lqr_RecvEcho(struct fsm *fp, struct mbuf *bp)
|
|
{
|
|
struct hdlc *hdlc = &link2physical(fp->link)->hdlc;
|
|
struct lcp *lcp = fsm2lcp(fp);
|
|
struct echolqr lqr;
|
|
|
|
if (mbuf_Length(bp) == sizeof lqr) {
|
|
bp = mbuf_Read(bp, &lqr, sizeof lqr);
|
|
lqr.magic = ntohl(lqr.magic);
|
|
lqr.signature = ntohl(lqr.signature);
|
|
lqr.sequence = ntohl(lqr.sequence);
|
|
|
|
/* Tolerate echo replies with either magic number */
|
|
if (lqr.magic != 0 && lqr.magic != lcp->his_magic &&
|
|
lqr.magic != lcp->want_magic) {
|
|
log_Printf(LogWARN, "%s: lqr_RecvEcho: Bad magic: expected 0x%08x,"
|
|
" got 0x%08x\n", fp->link->name, lcp->his_magic, lqr.magic);
|
|
/*
|
|
* XXX: We should send a terminate request. But poor implementations may
|
|
* die as a result.
|
|
*/
|
|
}
|
|
if (lqr.signature == SIGNATURE) {
|
|
/* careful not to update lqm.echo.seq_recv with older values */
|
|
if ((hdlc->lqm.echo.seq_recv > (u_int32_t)0 - 5 && lqr.sequence < 5) ||
|
|
(hdlc->lqm.echo.seq_recv <= (u_int32_t)0 - 5 &&
|
|
lqr.sequence > hdlc->lqm.echo.seq_recv))
|
|
hdlc->lqm.echo.seq_recv = lqr.sequence;
|
|
} else
|
|
log_Printf(LogWARN, "lqr_RecvEcho: Got sig 0x%08lx, not 0x%08lx !\n",
|
|
(u_long)ntohl(lqr.signature), (u_long)SIGNATURE);
|
|
} else
|
|
log_Printf(LogWARN, "lqr_RecvEcho: Got packet size %d, expecting %ld !\n",
|
|
mbuf_Length(bp), (long)sizeof(struct echolqr));
|
|
return bp;
|
|
}
|
|
|
|
void
|
|
lqr_ChangeOrder(struct lqrdata *src, struct lqrdata *dst)
|
|
{
|
|
u_int32_t *sp, *dp;
|
|
int n;
|
|
|
|
sp = (u_int32_t *) src;
|
|
dp = (u_int32_t *) dst;
|
|
for (n = 0; n < sizeof(struct lqrdata) / sizeof(u_int32_t); n++, sp++, dp++)
|
|
*dp = ntohl(*sp);
|
|
}
|
|
|
|
static void
|
|
SendLqrData(struct lcp *lcp)
|
|
{
|
|
struct mbuf *bp;
|
|
int extra;
|
|
|
|
extra = proto_WrapperOctets(lcp, PROTO_LQR) +
|
|
acf_WrapperOctets(lcp, PROTO_LQR);
|
|
bp = mbuf_Alloc(sizeof(struct lqrdata) + extra, MB_LQROUT);
|
|
bp->cnt -= extra;
|
|
bp->offset += extra;
|
|
link_PushPacket(lcp->fsm.link, bp, lcp->fsm.bundle,
|
|
LINK_QUEUES(lcp->fsm.link) - 1, PROTO_LQR);
|
|
}
|
|
|
|
static void
|
|
SendLqrReport(void *v)
|
|
{
|
|
struct lcp *lcp = (struct lcp *)v;
|
|
struct physical *p = link2physical(lcp->fsm.link);
|
|
|
|
timer_Stop(&p->hdlc.lqm.timer);
|
|
|
|
if (p->hdlc.lqm.method & LQM_LQR) {
|
|
if (p->hdlc.lqm.lqr.resent > 5) {
|
|
/* XXX: Should implement LQM strategy */
|
|
log_Printf(LogPHASE, "%s: ** Too many LQR packets lost **\n",
|
|
lcp->fsm.link->name);
|
|
log_Printf(LogLQM, "%s: Too many LQR packets lost\n",
|
|
lcp->fsm.link->name);
|
|
p->hdlc.lqm.method = 0;
|
|
datalink_Down(p->dl, CLOSE_NORMAL);
|
|
} else {
|
|
SendLqrData(lcp);
|
|
p->hdlc.lqm.lqr.resent++;
|
|
}
|
|
} else if (p->hdlc.lqm.method & LQM_ECHO) {
|
|
if ((p->hdlc.lqm.echo.seq_sent > 5 &&
|
|
p->hdlc.lqm.echo.seq_sent - 5 > p->hdlc.lqm.echo.seq_recv) ||
|
|
(p->hdlc.lqm.echo.seq_sent <= 5 &&
|
|
p->hdlc.lqm.echo.seq_sent > p->hdlc.lqm.echo.seq_recv + 5)) {
|
|
log_Printf(LogPHASE, "%s: ** Too many ECHO LQR packets lost **\n",
|
|
lcp->fsm.link->name);
|
|
log_Printf(LogLQM, "%s: Too many ECHO LQR packets lost\n",
|
|
lcp->fsm.link->name);
|
|
p->hdlc.lqm.method = 0;
|
|
datalink_Down(p->dl, CLOSE_NORMAL);
|
|
} else
|
|
SendEchoReq(lcp);
|
|
}
|
|
if (p->hdlc.lqm.method && p->hdlc.lqm.timer.load)
|
|
timer_Start(&p->hdlc.lqm.timer);
|
|
}
|
|
|
|
struct mbuf *
|
|
lqr_Input(struct bundle *bundle, struct link *l, struct mbuf *bp)
|
|
{
|
|
struct physical *p = link2physical(l);
|
|
struct lcp *lcp = p->hdlc.lqm.owner;
|
|
int len;
|
|
|
|
if (p == NULL) {
|
|
log_Printf(LogERROR, "lqr_Input: Not a physical link - dropped\n");
|
|
mbuf_Free(bp);
|
|
return NULL;
|
|
}
|
|
|
|
p->hdlc.lqm.lqr.SaveInLQRs++;
|
|
|
|
len = mbuf_Length(bp);
|
|
if (len != sizeof(struct lqrdata))
|
|
log_Printf(LogWARN, "lqr_Input: Got packet size %d, expecting %ld !\n",
|
|
len, (long)sizeof(struct lqrdata));
|
|
else if (!IsAccepted(l->lcp.cfg.lqr) && !(p->hdlc.lqm.method & LQM_LQR)) {
|
|
bp = mbuf_Contiguous(proto_Prepend(bp, PROTO_LQR, 0, 0));
|
|
lcp_SendProtoRej(lcp, MBUF_CTOP(bp), bp->cnt);
|
|
} else {
|
|
struct lqrdata *lqr;
|
|
u_int32_t lastLQR;
|
|
|
|
bp = mbuf_Contiguous(bp);
|
|
lqr = (struct lqrdata *)MBUF_CTOP(bp);
|
|
if (ntohl(lqr->MagicNumber) != lcp->his_magic)
|
|
log_Printf(LogWARN, "lqr_Input: magic 0x%08lx is wrong,"
|
|
" expecting 0x%08lx\n",
|
|
(u_long)ntohl(lqr->MagicNumber), (u_long)lcp->his_magic);
|
|
else {
|
|
/*
|
|
* Remember our PeerInLQRs, then convert byte order and save
|
|
*/
|
|
lastLQR = p->hdlc.lqm.lqr.peer.PeerInLQRs;
|
|
|
|
lqr_ChangeOrder(lqr, &p->hdlc.lqm.lqr.peer);
|
|
lqr_Dump(l->name, "Input", &p->hdlc.lqm.lqr.peer);
|
|
/* we have received an LQR from peer */
|
|
p->hdlc.lqm.lqr.resent = 0;
|
|
|
|
/*
|
|
* Generate an LQR response if we're not running an LQR timer OR
|
|
* two successive LQR's PeerInLQRs are the same OR we're not going to
|
|
* send our next one before the peers max timeout.
|
|
*/
|
|
if (p->hdlc.lqm.timer.load == 0 ||
|
|
!(p->hdlc.lqm.method & LQM_LQR) ||
|
|
(lastLQR && lastLQR == p->hdlc.lqm.lqr.peer.PeerInLQRs) ||
|
|
(p->hdlc.lqm.lqr.peer_timeout &&
|
|
p->hdlc.lqm.timer.rest * 100 / SECTICKS >
|
|
p->hdlc.lqm.lqr.peer_timeout))
|
|
SendLqrData(lcp);
|
|
}
|
|
}
|
|
mbuf_Free(bp);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* When LCP is reached to opened state, We'll start LQM activity.
|
|
*/
|
|
|
|
static void
|
|
lqr_Setup(struct lcp *lcp)
|
|
{
|
|
struct physical *physical = link2physical(lcp->fsm.link);
|
|
|
|
physical->hdlc.lqm.lqr.resent = 0;
|
|
physical->hdlc.lqm.echo.seq_sent = 0;
|
|
physical->hdlc.lqm.echo.seq_recv = 0;
|
|
memset(&physical->hdlc.lqm.lqr.peer, '\0',
|
|
sizeof physical->hdlc.lqm.lqr.peer);
|
|
|
|
physical->hdlc.lqm.method = LQM_ECHO;
|
|
if (IsEnabled(lcp->cfg.lqr) && !REJECTED(lcp, TY_QUALPROTO))
|
|
physical->hdlc.lqm.method |= LQM_LQR;
|
|
timer_Stop(&physical->hdlc.lqm.timer);
|
|
|
|
physical->hdlc.lqm.lqr.peer_timeout = lcp->his_lqrperiod;
|
|
if (lcp->his_lqrperiod)
|
|
log_Printf(LogLQM, "%s: Expecting LQR every %d.%02d secs\n",
|
|
physical->link.name, lcp->his_lqrperiod / 100,
|
|
lcp->his_lqrperiod % 100);
|
|
|
|
if (lcp->want_lqrperiod) {
|
|
log_Printf(LogLQM, "%s: Will send %s every %d.%02d secs\n",
|
|
physical->link.name,
|
|
physical->hdlc.lqm.method & LQM_LQR ? "LQR" : "ECHO LQR",
|
|
lcp->want_lqrperiod / 100, lcp->want_lqrperiod % 100);
|
|
physical->hdlc.lqm.timer.load = lcp->want_lqrperiod * SECTICKS / 100;
|
|
physical->hdlc.lqm.timer.func = SendLqrReport;
|
|
physical->hdlc.lqm.timer.name = "lqm";
|
|
physical->hdlc.lqm.timer.arg = lcp;
|
|
} else {
|
|
physical->hdlc.lqm.timer.load = 0;
|
|
if (!lcp->his_lqrperiod)
|
|
log_Printf(LogLQM, "%s: LQR/ECHO LQR not negotiated\n",
|
|
physical->link.name);
|
|
}
|
|
}
|
|
|
|
void
|
|
lqr_Start(struct lcp *lcp)
|
|
{
|
|
struct physical *p = link2physical(lcp->fsm.link);
|
|
|
|
lqr_Setup(lcp);
|
|
if (p->hdlc.lqm.timer.load)
|
|
SendLqrReport(lcp);
|
|
}
|
|
|
|
void
|
|
lqr_reStart(struct lcp *lcp)
|
|
{
|
|
struct physical *p = link2physical(lcp->fsm.link);
|
|
|
|
lqr_Setup(lcp);
|
|
if (p->hdlc.lqm.timer.load)
|
|
timer_Start(&p->hdlc.lqm.timer);
|
|
}
|
|
|
|
void
|
|
lqr_StopTimer(struct physical *physical)
|
|
{
|
|
timer_Stop(&physical->hdlc.lqm.timer);
|
|
}
|
|
|
|
void
|
|
lqr_Stop(struct physical *physical, int method)
|
|
{
|
|
if (method == LQM_LQR)
|
|
log_Printf(LogLQM, "%s: Stop sending LQR, Use LCP ECHO instead.\n",
|
|
physical->link.name);
|
|
if (method == LQM_ECHO)
|
|
log_Printf(LogLQM, "%s: Stop sending LCP ECHO.\n",
|
|
physical->link.name);
|
|
physical->hdlc.lqm.method &= ~method;
|
|
if (physical->hdlc.lqm.method)
|
|
SendLqrReport(physical->hdlc.lqm.owner);
|
|
else
|
|
timer_Stop(&physical->hdlc.lqm.timer);
|
|
}
|
|
|
|
void
|
|
lqr_Dump(const char *link, const char *message, const struct lqrdata *lqr)
|
|
{
|
|
if (log_IsKept(LogLQM)) {
|
|
log_Printf(LogLQM, "%s: %s:\n", link, message);
|
|
log_Printf(LogLQM, " Magic: %08x LastOutLQRs: %08x\n",
|
|
lqr->MagicNumber, lqr->LastOutLQRs);
|
|
log_Printf(LogLQM, " LastOutPackets: %08x LastOutOctets: %08x\n",
|
|
lqr->LastOutPackets, lqr->LastOutOctets);
|
|
log_Printf(LogLQM, " PeerInLQRs: %08x PeerInPackets: %08x\n",
|
|
lqr->PeerInLQRs, lqr->PeerInPackets);
|
|
log_Printf(LogLQM, " PeerInDiscards: %08x PeerInErrors: %08x\n",
|
|
lqr->PeerInDiscards, lqr->PeerInErrors);
|
|
log_Printf(LogLQM, " PeerInOctets: %08x PeerOutLQRs: %08x\n",
|
|
lqr->PeerInOctets, lqr->PeerOutLQRs);
|
|
log_Printf(LogLQM, " PeerOutPackets: %08x PeerOutOctets: %08x\n",
|
|
lqr->PeerOutPackets, lqr->PeerOutOctets);
|
|
}
|
|
}
|
|
|
|
static struct mbuf *
|
|
lqr_LayerPush(struct bundle *b, struct link *l, struct mbuf *bp,
|
|
int pri, u_short *proto)
|
|
{
|
|
struct physical *p = link2physical(l);
|
|
int len;
|
|
|
|
if (!p) {
|
|
/* Oops - can't happen :-] */
|
|
mbuf_Free(bp);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* From rfc1989:
|
|
*
|
|
* All octets which are included in the FCS calculation MUST be counted,
|
|
* including the packet header, the information field, and any padding.
|
|
* The FCS octets MUST also be counted, and one flag octet per frame
|
|
* MUST be counted. All other octets (such as additional flag
|
|
* sequences, and escape bits or octets) MUST NOT be counted.
|
|
*
|
|
* As we're stacked before the HDLC layer (otherwise HDLC wouldn't be
|
|
* able to calculate the FCS), we must not forget about these additional
|
|
* bytes when we're asynchronous.
|
|
*
|
|
* We're also expecting to be stacked *before* the proto and acf layers.
|
|
* If we were after these, it makes alignment more of a pain, and we
|
|
* don't do LQR without these layers.
|
|
*/
|
|
|
|
bp = mbuf_Contiguous(bp);
|
|
len = mbuf_Length(bp);
|
|
|
|
if (!physical_IsSync(p))
|
|
p->hdlc.lqm.OutOctets += hdlc_WrapperOctets(&l->lcp, *proto);
|
|
p->hdlc.lqm.OutOctets += acf_WrapperOctets(&l->lcp, *proto) +
|
|
proto_WrapperOctets(&l->lcp, *proto) + len + 1;
|
|
p->hdlc.lqm.OutPackets++;
|
|
|
|
if (*proto == PROTO_LQR) {
|
|
/* Overwrite the entire packet (created in SendLqrData()) */
|
|
struct lqrdata lqr;
|
|
|
|
lqr.MagicNumber = p->link.lcp.want_magic;
|
|
lqr.LastOutLQRs = p->hdlc.lqm.lqr.peer.PeerOutLQRs;
|
|
lqr.LastOutPackets = p->hdlc.lqm.lqr.peer.PeerOutPackets;
|
|
lqr.LastOutOctets = p->hdlc.lqm.lqr.peer.PeerOutOctets;
|
|
lqr.PeerInLQRs = p->hdlc.lqm.lqr.SaveInLQRs;
|
|
lqr.PeerInPackets = p->hdlc.lqm.SaveInPackets;
|
|
lqr.PeerInDiscards = p->hdlc.lqm.SaveInDiscards;
|
|
lqr.PeerInErrors = p->hdlc.lqm.SaveInErrors;
|
|
lqr.PeerInOctets = p->hdlc.lqm.SaveInOctets;
|
|
lqr.PeerOutPackets = p->hdlc.lqm.OutPackets;
|
|
lqr.PeerOutOctets = p->hdlc.lqm.OutOctets;
|
|
if (p->hdlc.lqm.lqr.peer.LastOutLQRs == p->hdlc.lqm.lqr.OutLQRs) {
|
|
/*
|
|
* only increment if it's the first time or we've got a reply
|
|
* from the last one
|
|
*/
|
|
lqr.PeerOutLQRs = ++p->hdlc.lqm.lqr.OutLQRs;
|
|
lqr_Dump(l->name, "Output", &lqr);
|
|
} else {
|
|
lqr.PeerOutLQRs = p->hdlc.lqm.lqr.OutLQRs;
|
|
lqr_Dump(l->name, "Output (again)", &lqr);
|
|
}
|
|
lqr_ChangeOrder(&lqr, (struct lqrdata *)MBUF_CTOP(bp));
|
|
}
|
|
|
|
return bp;
|
|
}
|
|
|
|
static struct mbuf *
|
|
lqr_LayerPull(struct bundle *b, struct link *l, struct mbuf *bp, u_short *proto)
|
|
{
|
|
/*
|
|
* We mark the packet as ours but don't do anything 'till it's dispatched
|
|
* to lqr_Input()
|
|
*/
|
|
if (*proto == PROTO_LQR)
|
|
mbuf_SetType(bp, MB_LQRIN);
|
|
return bp;
|
|
}
|
|
|
|
/*
|
|
* Statistics for pulled packets are recorded either in hdlc_PullPacket()
|
|
* or sync_PullPacket()
|
|
*/
|
|
|
|
struct layer lqrlayer = { LAYER_LQR, "lqr", lqr_LayerPush, lqr_LayerPull };
|