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Don't pause for one second before starting LCP

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negotiation.  Instead, incrementally pause after
receiving LCPs with the same magic.  We can now
suffer a server that waits more than 1 second before
responding.  Pauses greater than a second get
hopelessly confusing as when the server eventually
starts, it sees a flood of Config Requests followed
by config NAKs and changes of magic.  This causes the
server to change its magic over and over.....
This commit is contained in:
Brian Somers 1997-09-22 02:51:24 +00:00
parent 3defb7fc30
commit 586526be29
1 changed files with 12 additions and 4 deletions
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16
usr.sbin/ppp/lcp.c
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@ -17,7 +17,7 @@
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* $Id: lcp.c,v 1.30 1997/09/03 02:08:19 brian Exp $
* $Id: lcp.c,v 1.31 1997/09/21 23:01:34 brian Exp $
*
* TODO:
* o Validate magic number received from peer.
@ -26,6 +26,7 @@
#include <sys/time.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <signal.h>
#include "fsm.h"
#include "lcp.h"
#include "ipcp.h"
@ -93,6 +94,7 @@ struct fsm LcpFsm = {
};
static struct pppTimer LcpReportTimer;
static int LcpFailedMagic;
char *PhaseNames[] = {
"Dead", "Establish", "Authenticate", "Network", "Terminate"
@ -376,11 +378,13 @@ void
LcpUp()
{
FsmUp(&LcpFsm);
LcpFailedMagic = 0;
}
void
LcpDown()
{ /* Sudden death */
LcpFailedMagic = 0;
NewPhase(PHASE_DEAD);
StopAllTimers();
FsmDown(&LcpFsm);
@ -390,8 +394,7 @@ void
LcpOpen(int mode)
{
LcpFsm.open_mode = mode;
if (mode == OPEN_ACTIVE)
sleep(1); /* Give the peer time to start up */
LcpFailedMagic = 0;
FsmOpen(&LcpFsm);
}
@ -399,6 +402,7 @@ void
LcpClose()
{
FsmClose(&LcpFsm);
LcpFailedMagic = 0;
}
/*
@ -566,14 +570,18 @@ LcpDecodeConfig(u_char * cp, int plen, int mode)
if (LcpInfo.want_magic) {
/* Validate magic number */
if (magic == LcpInfo.want_magic) {
LogPrintf(LogLCP, "Magic is same (%08x)\n", magic);
LogPrintf(LogLCP, "Magic is same (%08x) - %d times\n",
magic, ++LcpFailedMagic);
LcpInfo.want_magic = GenerateMagic();
bcopy(cp, nakp, 6);
nakp += 6;
ualarm(TICKUNIT * (4 + 4 * LcpFailedMagic), 0);
sigpause(0);
} else {
LcpInfo.his_magic = magic;
bcopy(cp, ackp, length);
ackp += length;
LcpFailedMagic = 0;
}
} else {
LcpInfo.my_reject |= (1 << type);