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When negotiating ACCMAPs, sync our ACCMAP with the

Browse source 
peers by ORing the two together and NAKing or REQing
the result rather than allowing seperate local/peer
values.
If the peer REJs our ACCMAP and our ACCMAP isn't 0,
warn about it and ignore the rejection.
This commit is contained in:
Brian Somers 1999-03-01 13:46:45 +00:00
parent ba2e7a498e
commit 536d5b3331
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=44374
1 changed files with 17 additions and 5 deletions
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22
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 1.68 1999/02/18 00:52:14 brian Exp $
* $Id: lcp.c,v 1.69 1999/02/26 21:28:12 brian Exp $
*
* TODO:
* o Limit data field length by MRU
@ -645,14 +645,26 @@ LcpDecodeConfig(struct fsm *fp, u_char *cp, int plen, int mode_type,
switch (mode_type) {
case MODE_REQ:
lcp->his_accmap = accmap;
memcpy(dec->ackend, cp, 6);
dec->ackend += 6;
lcp->want_accmap |= accmap; /* restrict our requested map */
if (lcp->want_accmap == accmap) {
memcpy(dec->ackend, cp, 6);
dec->ackend += 6;
} else {
/* NAK with what we now want */
*dec->nakend++ = *cp;
*dec->nakend++ = 6;
ua_htonl(&lcp->want_accmap, dec->nakend);
dec->nakend += 4;
}
break;
case MODE_NAK:
lcp->want_accmap = accmap;
lcp->want_accmap |= accmap;
break;
case MODE_REJ:
lcp->his_reject |= (1 << type);
if (lcp->want_accmap)
log_Printf(LogWARN, "Peer is rejecting our ACCMAP.... bad news !\n");
else
lcp->his_reject |= (1 << type);
break;
}
break;