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freebsd-dev/usr.sbin/ppp/lcp.c
Brian Somers 7a6f872047 Create `struct bundle' - the top level control structure. 
This structure will eventually contain a list of NCPs (currently
only IPCP is supported) and a list of physical `struct link's.
It will also derive from a struct link itself.
Make ModemTimeout() static - it's way to dangerous to be called
from outside !
Bump version to 1.9.  Our first MP release should be 2.0.
1998-02-02 19:32:16 +00:00

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/*
* PPP Link Control Protocol (LCP) 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.
*
* $Id: lcp.c,v 1.55.2.5 1998/01/31 02:48:21 brian Exp $
*
* TODO:
* o Limit data field length by MRU
*/
#include <sys/param.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_tun.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <termios.h>
#include <unistd.h>
#include "command.h"
#include "mbuf.h"
#include "log.h"
#include "defs.h"
#include "timer.h"
#include "fsm.h"
#include "lcp.h"
#include "iplist.h"
#include "throughput.h"
#include "ipcp.h"
#include "lcpproto.h"
#include "bundle.h"
#include "hdlc.h"
#include "ccp.h"
#include "lqr.h"
#include "phase.h"
#include "loadalias.h"
#include "vars.h"
#include "auth.h"
#include "pap.h"
#include "chap.h"
#include "async.h"
#include "main.h"
#include "ip.h"
#include "modem.h"
#include "tun.h"
#include "link.h"
#include "physical.h"
/* for received LQRs */
struct lqrreq {
u_char type;
u_char length;
u_short proto; /* Quality protocol */
u_long period; /* Reporting interval */
};
static void LcpLayerUp(struct fsm *);
static void LcpLayerDown(struct fsm *);
static void LcpLayerStart(struct fsm *);
static void LcpLayerFinish(struct fsm *);
static void LcpInitRestartCounter(struct fsm *);
static void LcpSendConfigReq(struct fsm *);
static void LcpSendTerminateReq(struct fsm *);
static void LcpSendTerminateAck(struct fsm *);
static void LcpDecodeConfig(struct bundle *, u_char *, int, int);
struct lcpstate LcpInfo = {
{
"LCP", /* Name of protocol */
PROTO_LCP, /* Protocol Number */
LCP_MAXCODE,
1, /* Open mode delay */
ST_INITIAL, /* State of machine */
0, 0, 0,
{0, 0, 0, NULL, NULL, NULL}, /* FSM timer */
{0, 0, 0, NULL, NULL, NULL}, /* Open timer */
{0, 0, 0, NULL, NULL, NULL}, /* Stopped timer */
LogLCP,
NULL, /* link */
NULL, /* bundle */
LcpLayerUp,
LcpLayerDown,
LcpLayerStart,
LcpLayerFinish,
LcpInitRestartCounter,
LcpSendConfigReq,
LcpSendTerminateReq,
LcpSendTerminateAck,
LcpDecodeConfig,
}
};
static const char *cftypes[] = {
/* Check out the latest ``Assigned numbers'' rfc (rfc1700.txt) */
"???",
"MRU", /* 1: Maximum-Receive-Unit */
"ACCMAP", /* 2: Async-Control-Character-Map */
"AUTHPROTO", /* 3: Authentication-Protocol */
"QUALPROTO", /* 4: Quality-Protocol */
"MAGICNUM", /* 5: Magic-Number */
"RESERVED", /* 6: RESERVED */
"PROTOCOMP", /* 7: Protocol-Field-Compression */
"ACFCOMP", /* 8: Address-and-Control-Field-Compression */
"FCSALT", /* 9: FCS-Alternatives */
"SDP", /* 10: Self-Describing-Pad */
"NUMMODE", /* 11: Numbered-Mode */
"MULTIPROC", /* 12: Multi-Link-Procedure */
"CALLBACK", /* 13: Callback */
"CONTIME", /* 14: Connect-Time */
"COMPFRAME", /* 15: Compound-Frames */
"NDE", /* 16: Nominal-Data-Encapsulation */
"MULTIMRRU", /* 17: Multilink-MRRU */
"MULTISSNH", /* 18: Multilink-Short-Sequence-Number-Header */
"MULTIED", /* 19: Multilink-Endpoint-Descriminator */
"PROPRIETRY", /* 20: Proprietary */
"DCEID", /* 21: DCE-Identifier */
"MULTIPP", /* 22: Multi-Link-Plus-Procedure */
"LDBACP", /* 23: Link Discriminator for BACP */
};
#define NCFTYPES (sizeof cftypes/sizeof cftypes[0])
static void
LcpReportTime(void *v)
{
/* Moan about HDLC errors */
struct pppTimer *ReportTimer = (struct pppTimer *)v;
if (LogIsKept(LogDEBUG)) {
time_t t = time(NULL);
LogPrintf(LogDEBUG, "LcpReportTime: %s\n", ctime(&t));
}
StopTimer(ReportTimer);
ReportTimer->state = TIMER_STOPPED;
StartTimer(ReportTimer);
HdlcErrorCheck();
}
int
ReportLcpStatus(struct cmdargs const *arg)
{
if (!VarTerm)
return 1;
fprintf(VarTerm, "%s [%s]\n", LcpInfo.fsm.name,
StateNames[LcpInfo.fsm.state]);
fprintf(VarTerm,
" his side: MRU %d, ACCMAP %08lx, PROTOCOMP %d, ACFCOMP %d,\n"
" MAGIC %08lx, REJECT %04x\n",
LcpInfo.his_mru, (u_long)LcpInfo.his_accmap, LcpInfo.his_protocomp,
LcpInfo.his_acfcomp, (u_long)LcpInfo.his_magic, LcpInfo.his_reject);
fprintf(VarTerm,
" my side: MRU %d, ACCMAP %08lx, PROTOCOMP %d, ACFCOMP %d,\n"
" MAGIC %08lx, REJECT %04x\n",
LcpInfo.want_mru, (u_long)LcpInfo.want_accmap, LcpInfo.want_protocomp,
LcpInfo.want_acfcomp, (u_long)LcpInfo.want_magic, LcpInfo.my_reject);
fprintf(VarTerm, "\nDefaults: MRU = %d, ACCMAP = %08lx\t",
VarMRU, (u_long)VarAccmap);
fprintf(VarTerm, "Open Mode: %s",
(VarOpenMode == OPEN_PASSIVE) ? "passive" : "active");
if (VarOpenMode > 0)
fprintf(VarTerm, " (delay %d)", VarOpenMode);
fputc('\n', VarTerm);
return 0;
}
static u_int32_t
GenerateMagic(void)
{
/* Generate random number which will be used as magic number */
randinit();
return (random());
}
void
LcpInit(struct bundle *bundle, struct physical *physical)
{
/* Initialise ourselves */
FsmInit(&LcpInfo.fsm, bundle, physical2link(physical));
HdlcInit();
LcpInfo.his_mru = DEF_MRU;
LcpInfo.his_accmap = 0xffffffff;
LcpInfo.his_magic = 0;
LcpInfo.his_lqrperiod = 0;
LcpInfo.his_protocomp = 0;
LcpInfo.his_acfcomp = 0;
LcpInfo.his_auth = 0;
LcpInfo.want_mru = VarMRU;
LcpInfo.want_accmap = VarAccmap;
LcpInfo.want_magic = GenerateMagic();
LcpInfo.want_auth = Enabled(ConfChap) ? PROTO_CHAP :
Enabled(ConfPap) ? PROTO_PAP : 0;
LcpInfo.want_lqrperiod = Enabled(ConfLqr) ? VarLqrTimeout * 100 : 0;
LcpInfo.want_protocomp = Enabled(ConfProtocomp) ? 1 : 0;
LcpInfo.want_acfcomp = Enabled(ConfAcfcomp) ? 1 : 0;
LcpInfo.his_reject = LcpInfo.my_reject = 0;
LcpInfo.auth_iwait = LcpInfo.auth_ineed = 0;
LcpInfo.LcpFailedMagic = 0;
memset(&LcpInfo.ReportTimer, '\0', sizeof LcpInfo.ReportTimer);
LcpInfo.fsm.maxconfig = 10;
}
static void
LcpInitRestartCounter(struct fsm * fp)
{
/* Set fsm timer load */
fp->FsmTimer.load = VarRetryTimeout * SECTICKS;
fp->restart = 5;
}
int
LcpPutConf(int log, u_char *tgt, const struct lcp_opt *o, const char *nm,
const char *arg, ...)
{
va_list ap;
char buf[30];
va_start(ap, arg);
memcpy(tgt, o, o->len);
if (arg == NULL || *arg == '\0')
LogPrintf(log, " %s[%d]\n", nm, o->len);
else {
vsnprintf(buf, sizeof buf, arg, ap);
LogPrintf(log, " %s[%d] %s\n", nm, o->len, buf);
}
va_end(ap);
return o->len;
}
#define PUTN(ty) \
do { \
o.id = ty; \
o.len = 2; \
cp += LcpPutConf(LogLCP, cp, &o, cftypes[o.id], NULL); \
} while (0)
#define PUTHEX32(ty, arg) \
do { \
o.id = ty; \
o.len = 6; \
*(u_long *)o.data = htonl(arg); \
cp += LcpPutConf(LogLCP, cp, &o, cftypes[o.id], "0x%08lx", (u_long)arg);\
} while (0)
#define PUTACCMAP(arg) PUTHEX32(TY_ACCMAP, arg)
#define PUTMAGIC(arg) PUTHEX32(TY_MAGICNUM, arg)
#define PUTMRU(arg) \
do { \
o.id = TY_MRU; \
o.len = 4; \
*(u_short *)o.data = htons(arg); \
cp += LcpPutConf(LogLCP, cp, &o, cftypes[o.id], "%u", arg); \
} while (0)
#define PUTLQR(period) \
do { \
o.id = TY_QUALPROTO; \
o.len = 8; \
*(u_short *)o.data = htons(PROTO_LQR); \
*(u_long *)(o.data+2) = htonl(period); \
cp += LcpPutConf(LogLCP, cp, &o, cftypes[o.id], \
"period %ld", (u_long)period); \
} while (0)
#define PUTPAP() \
do { \
o.id = TY_AUTHPROTO; \
o.len = 4; \
*(u_short *)o.data = htons(PROTO_PAP); \
cp += LcpPutConf(LogLCP, cp, &o, cftypes[o.id], \
"0x%04x (PAP)", PROTO_PAP); \
} while (0)
#define PUTCHAP(val) \
do { \
o.id = TY_AUTHPROTO; \
o.len = 5; \
*(u_short *)o.data = htons(PROTO_CHAP); \
o.data[2] = val; \
cp += LcpPutConf(LogLCP, cp, &o, cftypes[o.id], \
"0x%04x (CHAP 0x%02x)", PROTO_CHAP, val); \
} while (0)
#define PUTMD5CHAP() PUTCHAP(0x05)
#define PUTMSCHAP() PUTCHAP(0x80)
static void
LcpSendConfigReq(struct fsm *fp)
{
/* Send config REQ please */
struct physical *p = link2physical(fp->link);
u_char *cp;
struct lcp_opt o;
if (!p) {
LogPrintf(LogERROR, "LcpSendConfigReq: Not a physical link !\n");
return;
}
LogPrintf(LogLCP, "LcpSendConfigReq\n");
cp = ReqBuff;
if (!Physical_IsSync(p)) {
if (LcpInfo.want_acfcomp && !REJECTED(&LcpInfo, TY_ACFCOMP))
PUTN(TY_ACFCOMP);
if (LcpInfo.want_protocomp && !REJECTED(&LcpInfo, TY_PROTOCOMP))
PUTN(TY_PROTOCOMP);
if (!REJECTED(&LcpInfo, TY_ACCMAP))
PUTACCMAP(LcpInfo.want_accmap);
}
if (!REJECTED(&LcpInfo, TY_MRU))
PUTMRU(LcpInfo.want_mru);
if (LcpInfo.want_magic && !REJECTED(&LcpInfo, TY_MAGICNUM))
PUTMAGIC(LcpInfo.want_magic);
if (LcpInfo.want_lqrperiod && !REJECTED(&LcpInfo, TY_QUALPROTO))
PUTLQR(LcpInfo.want_lqrperiod);
switch (LcpInfo.want_auth) {
case PROTO_PAP:
PUTPAP();
break;
case PROTO_CHAP:
#ifdef HAVE_DES
if (VarMSChap)
PUTMSCHAP(); /* Use MSChap */
else
#endif
PUTMD5CHAP(); /* Use MD5 */
break;
}
FsmOutput(fp, CODE_CONFIGREQ, fp->reqid++, ReqBuff, cp - ReqBuff);
}
void
LcpSendProtoRej(u_char *option, int count)
{
/* Don't understand `option' */
LogPrintf(LogLCP, "LcpSendProtoRej\n");
FsmOutput(&LcpInfo.fsm, CODE_PROTOREJ, LcpInfo.fsm.reqid, option, count);
}
static void
LcpSendTerminateReq(struct fsm * fp)
{
/* Term REQ just sent by FSM */
}
static void
LcpSendTerminateAck(struct fsm * fp)
{
/* Send Term ACK please */
LogPrintf(LogLCP, "LcpSendTerminateAck.\n");
FsmOutput(fp, CODE_TERMACK, fp->reqid++, NULL, 0);
}
static void
LcpLayerStart(struct fsm *fp)
{
/* We're about to start up ! */
struct physical *p = link2physical(fp->link);
LogPrintf(LogLCP, "LcpLayerStart\n");
if (p)
NewPhase(fp->bundle, p, PHASE_ESTABLISH);
else
LogPrintf(LogERROR, "LcpLayerStart: Not a physical link !\n");
}
static void
StopAllTimers(void)
{
StopTimer(&LcpInfo.ReportTimer);
StopIdleTimer();
StopTimer(&AuthPapInfo.authtimer);
StopTimer(&AuthChapInfo.authtimer);
StopLqrTimer();
}
static void
LcpLayerFinish(struct fsm *fp)
{
/* We're now down */
struct physical *p = link2physical(fp->link);
LogPrintf(LogLCP, "LcpLayerFinish\n");
LcpInfo.LcpFailedMagic = 0;
link_Close(fp->link, 0);
StopAllTimers();
CcpInfo.fsm.restart = 0;
IpcpInfo.fsm.restart = 0;
/* We're down at last. Lets tell background and direct mode to get out */
if (p)
NewPhase(fp->bundle, p, PHASE_DEAD);
else
LogPrintf(LogERROR, "LcpLayerFinish: Not a physical link !\n");
Prompt();
}
static void
LcpLayerUp(struct fsm *fp)
{
/* We're now up */
struct physical *p = link2physical(fp->link);
LogPrintf(LogLCP, "LcpLayerUp\n");
SetLinkParams(&LcpInfo);
if (p) {
NewPhase(fp->bundle, p, PHASE_AUTHENTICATE);
StartLqm(p);
} else
LogPrintf(LogERROR, "LcpLayerUp: Not a physical link !\n");
StopTimer(&LcpInfo.ReportTimer);
LcpInfo.ReportTimer.state = TIMER_STOPPED;
LcpInfo.ReportTimer.load = 60 * SECTICKS;
LcpInfo.ReportTimer.arg = &LcpInfo.ReportTimer;
LcpInfo.ReportTimer.func = LcpReportTime;
StartTimer(&LcpInfo.ReportTimer);
}
static void
LcpLayerDown(struct fsm *fp)
{
/* About to come down */
bundle_Linkdown(fp->bundle);
LogPrintf(LogLCP, "LcpLayerDown\n");
/*
* bundle_Linkdown() brings CCP & IPCP down, then waits 'till we go from
* STOPPING to STOPPED. At this point, the FSM gives us a LayerFinish
*/
}
void
LcpUp()
{
/* Lower layers are ready.... go */
LcpInfo.LcpFailedMagic = 0;
FsmUp(&LcpInfo.fsm);
}
void
LcpDown()
{
/* Physical link is gone - sudden death */
CcpDown(); /* CCP must come down */
IpcpDown(); /* IPCP must come down */
FsmDown(&LcpInfo.fsm);
/* FsmDown() results in a LcpLayerDown() if we're currently open. */
LcpLayerFinish(&LcpInfo.fsm);
}
void
LcpOpen(int open_mode)
{
/* Start LCP please (with the given open_mode) */
LcpInfo.fsm.open_mode = open_mode;
LcpInfo.LcpFailedMagic = 0;
FsmOpen(&LcpInfo.fsm);
}
void
LcpClose(struct fsm *fp)
{
/* Stop LCP please */
struct physical *p = link2physical(fp->link);
if (p)
NewPhase(fp->bundle, p, PHASE_TERMINATE);
else
LogPrintf(LogERROR, "LcpClose: Not a physical link !\n");
bundle_Linkdown(fp->bundle);
if (!(mode & MODE_DAEMON))
bundle_InterfaceDown(fp->bundle);
FsmClose(fp);
}
static void
LcpDecodeConfig(struct bundle *bundle, u_char *cp, int plen, int mode_type)
{
/* Deal with incoming PROTO_LCP */
int type, length, sz, pos;
u_int32_t *lp, magic, accmap;
u_short mtu, mru, *sp, proto;
struct lqrreq *req;
char request[20], desc[22];
ackp = AckBuff;
nakp = NakBuff;
rejp = RejBuff;
while (plen >= sizeof(struct fsmconfig)) {
type = *cp;
length = cp[1];
if (type < 0 || type >= NCFTYPES)
snprintf(request, sizeof request, " <%d>[%d]", type, length);
else
snprintf(request, sizeof request, " %s[%d]", cftypes[type], length);
switch (type) {
case TY_MRU:
sp = (u_short *) (cp + 2);
mru = htons(*sp);
LogPrintf(LogLCP, "%s %d\n", request, mru);
switch (mode_type) {
case MODE_REQ:
mtu = VarPrefMTU;
if (mtu == 0)
mtu = MAX_MTU;
if (mru > mtu) {
*sp = htons(mtu);
memcpy(nakp, cp, 4);
nakp += 4;
} else if (mru < MIN_MRU) {
*sp = htons(MIN_MRU);
memcpy(nakp, cp, 4);
nakp += 4;
} else {
LcpInfo.his_mru = mru;
memcpy(ackp, cp, 4);
ackp += 4;
}
break;
case MODE_NAK:
if (mru >= MIN_MRU || mru <= MAX_MRU)
LcpInfo.want_mru = mru;
break;
case MODE_REJ:
LcpInfo.his_reject |= (1 << type);
break;
}
break;
case TY_ACCMAP:
lp = (u_int32_t *) (cp + 2);
accmap = htonl(*lp);
LogPrintf(LogLCP, "%s 0x%08lx\n", request, (u_long)accmap);
switch (mode_type) {
case MODE_REQ:
LcpInfo.his_accmap = accmap;
memcpy(ackp, cp, 6);
ackp += 6;
break;
case MODE_NAK:
LcpInfo.want_accmap = accmap;
break;
case MODE_REJ:
LcpInfo.his_reject |= (1 << type);
break;
}
break;
case TY_AUTHPROTO:
sp = (u_short *) (cp + 2);
proto = ntohs(*sp);
switch (proto) {
case PROTO_PAP:
LogPrintf(LogLCP, "%s 0x%04x (PAP)\n", request, proto);
break;
case PROTO_CHAP:
LogPrintf(LogLCP, "%s 0x%04x (CHAP 0x%02x)\n", request, proto, cp[4]);
break;
default:
LogPrintf(LogLCP, "%s 0x%04x\n", request, proto);
break;
}
switch (mode_type) {
case MODE_REQ:
switch (proto) {
case PROTO_PAP:
if (length != 4) {
LogPrintf(LogLCP, " Bad length!\n");
goto reqreject;
}
if (Acceptable(ConfPap)) {
LcpInfo.his_auth = proto;
memcpy(ackp, cp, length);
ackp += length;
} else if (Acceptable(ConfChap)) {
*nakp++ = *cp;
*nakp++ = 5;
*nakp++ = (unsigned char) (PROTO_CHAP >> 8);
*nakp++ = (unsigned char) PROTO_CHAP;
#ifdef HAVE_DES
if (VarMSChap)
*nakp++ = 0x80;
else
#endif
*nakp++ = 5;
} else
goto reqreject;
break;
case PROTO_CHAP:
if (length < 5) {
LogPrintf(LogLCP, " Bad length!\n");
goto reqreject;
}
#ifdef HAVE_DES
if (Acceptable(ConfChap) && (cp[4] == 5 || cp[4] == 0x80))
#else
if (Acceptable(ConfChap) && cp[4] == 5)
#endif
{
LcpInfo.his_auth = proto;
memcpy(ackp, cp, length);
ackp += length;
#ifdef HAVE_DES
VarMSChap = cp[4] == 0x80;
#endif
} else if (Acceptable(ConfPap)) {
*nakp++ = *cp;
*nakp++ = 4;
*nakp++ = (unsigned char) (PROTO_PAP >> 8);
*nakp++ = (unsigned char) PROTO_PAP;
} else
goto reqreject;
break;
default:
LogPrintf(LogLCP, "%s 0x%04x - not recognised, NAK\n",
request, proto);
memcpy(nakp, cp, length);
nakp += length;
break;
}
break;
case MODE_NAK:
switch (proto) {
case PROTO_PAP:
if (Enabled(ConfPap))
LcpInfo.want_auth = PROTO_PAP;
else {
LogPrintf(LogLCP, "Peer will only send PAP (not enabled)\n");
LcpInfo.his_reject |= (1 << type);
}
break;
case PROTO_CHAP:
if (Enabled(ConfChap))
LcpInfo.want_auth = PROTO_CHAP;
else {
LogPrintf(LogLCP, "Peer will only send CHAP (not enabled)\n");
LcpInfo.his_reject |= (1 << type);
}
break;
default:
/* We've been NAK'd with something we don't understand :-( */
LcpInfo.his_reject |= (1 << type);
break;
}
break;
case MODE_REJ:
LcpInfo.his_reject |= (1 << type);
break;
}
break;
case TY_QUALPROTO:
req = (struct lqrreq *)cp;
LogPrintf(LogLCP, "%s proto %x, interval %dms\n",
request, ntohs(req->proto), ntohl(req->period) * 10);
switch (mode_type) {
case MODE_REQ:
if (ntohs(req->proto) != PROTO_LQR || !Acceptable(ConfLqr))
goto reqreject;
else {
LcpInfo.his_lqrperiod = ntohl(req->period);
if (LcpInfo.his_lqrperiod < 500)
LcpInfo.his_lqrperiod = 500;
req->period = htonl(LcpInfo.his_lqrperiod);
memcpy(ackp, cp, length);
ackp += length;
}
break;
case MODE_NAK:
break;
case MODE_REJ:
LcpInfo.his_reject |= (1 << type);
break;
}
break;
case TY_MAGICNUM:
lp = (u_int32_t *) (cp + 2);
magic = ntohl(*lp);
LogPrintf(LogLCP, "%s 0x%08lx\n", request, (u_long)magic);
switch (mode_type) {
case MODE_REQ:
if (LcpInfo.want_magic) {
/* Validate magic number */
if (magic == LcpInfo.want_magic) {
LogPrintf(LogLCP, "Magic is same (%08lx) - %d times\n",
(u_long)magic, ++LcpInfo.LcpFailedMagic);
LcpInfo.want_magic = GenerateMagic();
memcpy(nakp, cp, 6);
nakp += 6;
ualarm(TICKUNIT * (4 + 4 * LcpInfo.LcpFailedMagic), 0);
sigpause(0);
} else {
LcpInfo.his_magic = magic;
memcpy(ackp, cp, length);
ackp += length;
LcpInfo.LcpFailedMagic = 0;
}
} else {
LcpInfo.my_reject |= (1 << type);
goto reqreject;
}
break;
case MODE_NAK:
LogPrintf(LogLCP, " Magic 0x%08lx is NAKed!\n", (u_long)magic);
LcpInfo.want_magic = GenerateMagic();
break;
case MODE_REJ:
LogPrintf(LogLCP, " Magic 0x%80x is REJected!\n", magic);
LcpInfo.want_magic = 0;
LcpInfo.his_reject |= (1 << type);
break;
}
break;
case TY_PROTOCOMP:
LogPrintf(LogLCP, "%s\n", request);
switch (mode_type) {
case MODE_REQ:
if (Acceptable(ConfProtocomp)) {
LcpInfo.his_protocomp = 1;
memcpy(ackp, cp, 2);
ackp += 2;
} else {
#ifdef OLDMST
/*
* MorningStar before v1.3 needs NAK
*/
memcpy(nakp, cp, 2);
nakp += 2;
#else
memcpy(rejp, cp, 2);
rejp += 2;
LcpInfo.my_reject |= (1 << type);
#endif
}
break;
case MODE_NAK:
case MODE_REJ:
LcpInfo.want_protocomp = 0;
LcpInfo.his_reject |= (1 << type);
break;
}
break;
case TY_ACFCOMP:
LogPrintf(LogLCP, "%s\n", request);
switch (mode_type) {
case MODE_REQ:
if (Acceptable(ConfAcfcomp)) {
LcpInfo.his_acfcomp = 1;
memcpy(ackp, cp, 2);
ackp += 2;
} else {
#ifdef OLDMST
/*
* MorningStar before v1.3 needs NAK
*/
memcpy(nakp, cp, 2);
nakp += 2;
#else
memcpy(rejp, cp, 2);
rejp += 2;
LcpInfo.my_reject |= (1 << type);
#endif
}
break;
case MODE_NAK:
case MODE_REJ:
LcpInfo.want_acfcomp = 0;
LcpInfo.his_reject |= (1 << type);
break;
}
break;
case TY_SDP:
LogPrintf(LogLCP, "%s\n", request);
switch (mode_type) {
case MODE_REQ:
case MODE_NAK:
case MODE_REJ:
break;
}
break;
default:
sz = (sizeof desc - 2) / 2;
if (sz > length - 2)
sz = length - 2;
pos = 0;
desc[0] = sz ? ' ' : '\0';
for (pos = 0; sz--; pos++)
sprintf(desc+(pos<<1)+1, "%02x", cp[pos+2]);
LogPrintf(LogLCP, "%s%s\n", request, desc);
if (mode_type == MODE_REQ) {
reqreject:
if (length > sizeof RejBuff - (rejp - RejBuff)) {
length = sizeof RejBuff - (rejp - RejBuff);
LogPrintf(LogLCP, "Can't REJ length %d - trunating to %d\n",
cp[1], length);
}
memcpy(rejp, cp, length);
rejp += length;
LcpInfo.my_reject |= (1 << type);
if (length != cp[1])
return;
}
break;
}
/* to avoid inf. loop */
if (length == 0) {
LogPrintf(LogLCP, "LCP size zero\n");
break;
}
plen -= length;
cp += length;
}
}
void
LcpInput(struct mbuf * bp)
{
/* Got PROTO_LCP from link */
FsmInput(&LcpInfo.fsm, bp);
}
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