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7308ec6890
freebsd/usr.sbin/ppp/lcp.c
Brian Somers 7308ec6890 Move the global FSMs into their relevent structures. 
IPCP, CCP and LCP are now just derived FSMs.
Comment each of the FSM implementations so that we can
tell what's going on.
Revise the state transitions so that CCP and IPCP actually
send terminate REQs when appropriate.

The OS & IPCP layers are still like spagetti (next job).
1998-01-31 02:48:30 +00:00

872 lines
21 KiB
C
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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 1.55.2.4 1998/01/30 19:45:47 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 "os.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(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,
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 physical *physical)
{
/* Initialise ourselves */
FsmInit(&LcpInfo.fsm, 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(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(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(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 */
OsLinkdown();
LogPrintf(LogLCP, "LcpLayerDown\n");
/*
* OsLinkdown() 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(p, PHASE_TERMINATE);
else
LogPrintf(LogERROR, "LcpClose: Not a physical link !\n");
OsInterfaceDown(0);
FsmClose(fp);
}
static void
LcpDecodeConfig(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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