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ppp: md5 and mschap inside chap, do not request encryption with -c or -C (thanks k0ga)

p2.patch: Do not request encriptation with -c or -C in ppp
(it was a bit annoying request compression, and when the ACK
from the server was received then send a NAK).

p3.patch: Add support for md5 and mschap in in chap
(without this patch ppp was passing to the net stage
without worring about chap).

--- a/sys/src/cmd/ip/ppp/ppp.c

+++ b/sys/src/cmd/ip/ppp/ppp.c

@@ -243,12 +243,21 @@

 		}

 		break;

 	case Pauth:

-		if(server)

+		if(server) {

 			chapinit(ppp);

-		else if(ppp->chap->proto == APpasswd)

-			papinit(ppp);

-		else

-			setphase(ppp, Pnet);

+		} else {

+			switch (ppp->chap->proto) {

+			case APpasswd:

+				papinit(ppp);

+				break;

+			case APmd5:

+			case APmschap:

+				break;

+			default:

+				setphase(ppp, Pnet);

+				break;

+			}

+		}

 		break;

 	case Pnet:

 		pinit(ppp, ppp->ccp);

@@ -276,7 +285,14 @@

 		ppp->rctlmap = 0;

 		ppp->ipcp->state = Sclosed;

 		ppp->ipcp->optmask = 0xffffffff;

-

+		if(noipcompress) {

+			p->optmask &= ~Fac;

+			ppp->ipcp->optmask &= ~Fipaddrs;

+		}

+		if(nocompress) {

+			p->optmask &= ~Fpc;

+			ppp->ipcp->optmask &= ~Fipcompress;

+		}

 		p->echotimeout = 0;

 		/* quality goo */

-- 

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