1342caed9c
bundle (non-negotiated vars) or to their respective IPCP, LCP or CCP. o Enable rolling throughput statistics by default. o Remove the `display' command. These values now appear in `show bundle', `show ipcp', `show ccp' and `show lcp'. o Initialise auth name & key at bundle create time (oops). o Rename pppd-deflate (the id-24 hack) to deflate24. o Don't send both a REJ and a NAK to an IPCP or LCP REQ. Favour the REJ (already done at the CCP level). o Recurse in datalink_UpdateSet() when we change state, otherwise we end up setting no descriptors and getting jammed in the imminent select() instead of doing the dial/login/hangup. o Display our CHAP encryption method despite being built with DES. o Display VJ as not negotiated in ``show ipcp'' when necessary.
929 lines
22 KiB
C
929 lines
22 KiB
C
/*
|
|
* PPP Finite State Machine for LCP/IPCP
|
|
*
|
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* Written by Toshiharu OHNO (tony-o@iij.ad.jp)
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*
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* Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
|
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* distribution and use acknowledge that the software was developed
|
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* by the Internet Initiative Japan, Inc. The name of the
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* IIJ may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
|
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
|
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* $Id: fsm.c,v 1.27.2.27 1998/04/07 00:53:41 brian Exp $
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*
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* TODO:
|
|
*/
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|
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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|
|
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#include <string.h>
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#include <termios.h>
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#include "mbuf.h"
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#include "log.h"
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#include "defs.h"
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#include "timer.h"
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#include "fsm.h"
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#include "iplist.h"
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#include "lqr.h"
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#include "hdlc.h"
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#include "throughput.h"
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#include "slcompress.h"
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#include "ipcp.h"
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#include "filter.h"
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#include "descriptor.h"
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#include "lcp.h"
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#include "ccp.h"
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#include "link.h"
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#include "mp.h"
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#include "bundle.h"
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#include "async.h"
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#include "physical.h"
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#include "lcpproto.h"
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|
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static void FsmSendConfigReq(struct fsm *);
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static void FsmSendTerminateReq(struct fsm *);
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static void FsmInitRestartCounter(struct fsm *);
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typedef void (recvfn)(struct fsm *, struct fsmheader *, struct mbuf *);
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static recvfn FsmRecvConfigReq, FsmRecvConfigAck, FsmRecvConfigNak,
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FsmRecvConfigRej, FsmRecvTermReq, FsmRecvTermAck,
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FsmRecvCodeRej, FsmRecvProtoRej, FsmRecvEchoReq,
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FsmRecvEchoRep, FsmRecvDiscReq, FsmRecvIdent,
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FsmRecvTimeRemain, FsmRecvResetReq, FsmRecvResetAck;
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|
|
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static const struct fsmcodedesc {
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recvfn *recv;
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unsigned check_reqid : 1;
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unsigned inc_reqid : 1;
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const char *name;
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} FsmCodes[] = {
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{ FsmRecvConfigReq, 0, 0, "ConfigReq" },
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{ FsmRecvConfigAck, 1, 1, "ConfigAck" },
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{ FsmRecvConfigNak, 1, 1, "ConfigNak" },
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{ FsmRecvConfigRej, 1, 1, "ConfigRej" },
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{ FsmRecvTermReq, 0, 0, "TerminateReq" },
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{ FsmRecvTermAck, 1, 1, "TerminateAck" },
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{ FsmRecvCodeRej, 0, 0, "CodeRej" },
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{ FsmRecvProtoRej, 0, 0, "ProtocolRej" },
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{ FsmRecvEchoReq, 0, 0, "EchoRequest" },
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{ FsmRecvEchoRep, 0, 0, "EchoReply" },
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{ FsmRecvDiscReq, 0, 0, "DiscardReq" },
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{ FsmRecvIdent, 0, 0, "Ident" },
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{ FsmRecvTimeRemain,0, 0, "TimeRemain" },
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{ FsmRecvResetReq, 0, 0, "ResetReqt" },
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{ FsmRecvResetAck, 0, 1, "ResetAck" }
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};
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|
|
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static const char *
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Code2Nam(u_int code)
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{
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if (code == 0 || code > sizeof FsmCodes / sizeof FsmCodes[0])
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return "Unknown";
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return FsmCodes[code-1].name;
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}
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|
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const char *
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State2Nam(u_int state)
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{
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static const char *StateNames[] = {
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"Initial", "Starting", "Closed", "Stopped", "Closing", "Stopping",
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"Req-Sent", "Ack-Rcvd", "Ack-Sent", "Opened",
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};
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|
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if (state >= sizeof StateNames / sizeof StateNames[0])
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return "unknown";
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return StateNames[state];
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}
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static void
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StoppedTimeout(void *v)
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{
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struct fsm *fp = (struct fsm *)v;
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LogPrintf(fp->LogLevel, "Stopped timer expired\n");
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if (fp->OpenTimer.state == TIMER_RUNNING) {
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LogPrintf(LogWARN, "%s: aborting open delay due to stopped timer\n",
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fp->name);
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StopTimer(&fp->OpenTimer);
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}
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if (fp->state == ST_STOPPED) {
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/* Force ourselves back to initial */
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FsmDown(fp);
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FsmClose(fp);
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}
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}
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void
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fsm_Init(struct fsm *fp, const char *name, u_short proto, int mincode,
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int maxcode, int maxcfg, int LogLevel, struct bundle *bundle,
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struct link *l, const struct fsm_parent *parent,
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struct fsm_callbacks *fn, const char *timer_names[3])
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{
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fp->name = name;
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fp->proto = proto;
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fp->min_code = mincode;
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fp->max_code = maxcode;
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fp->state = fp->min_code > CODE_TERMACK ? ST_OPENED : ST_INITIAL;
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fp->reqid = 1;
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fp->restart = 1;
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fp->maxconfig = maxcfg;
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memset(&fp->FsmTimer, '\0', sizeof fp->FsmTimer);
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memset(&fp->OpenTimer, '\0', sizeof fp->OpenTimer);
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memset(&fp->StoppedTimer, '\0', sizeof fp->StoppedTimer);
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fp->LogLevel = LogLevel;
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fp->link = l;
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fp->bundle = bundle;
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fp->parent = parent;
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fp->fn = fn;
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fp->FsmTimer.name = timer_names[0];
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fp->OpenTimer.name = timer_names[1];
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fp->StoppedTimer.name = timer_names[2];
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}
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static void
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NewState(struct fsm * fp, int new)
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{
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LogPrintf(fp->LogLevel, "State change %s --> %s\n",
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State2Nam(fp->state), State2Nam(new));
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if (fp->state == ST_STOPPED && fp->StoppedTimer.state == TIMER_RUNNING)
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StopTimer(&fp->StoppedTimer);
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fp->state = new;
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if ((new >= ST_INITIAL && new <= ST_STOPPED) || (new == ST_OPENED)) {
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StopTimer(&fp->FsmTimer);
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if (new == ST_STOPPED && fp->StoppedTimer.load) {
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fp->StoppedTimer.state = TIMER_STOPPED;
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fp->StoppedTimer.func = StoppedTimeout;
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fp->StoppedTimer.arg = (void *) fp;
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StartTimer(&fp->StoppedTimer);
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}
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}
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}
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void
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FsmOutput(struct fsm *fp, u_int code, u_int id, u_char *ptr, int count)
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{
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int plen;
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struct fsmheader lh;
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struct mbuf *bp;
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if (LogIsKept(fp->LogLevel)) {
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LogPrintf(fp->LogLevel, "Send%s(%d) state = %s\n", Code2Nam(code),
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id, State2Nam(fp->state));
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switch (code) {
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case CODE_CONFIGREQ:
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case CODE_CONFIGACK:
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case CODE_CONFIGREJ:
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case CODE_CONFIGNAK:
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(*fp->fn->DecodeConfig)(fp, ptr, count, MODE_NOP, NULL);
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if (count < sizeof(struct fsmconfig))
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LogPrintf(fp->LogLevel, " [EMPTY]\n");
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break;
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}
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}
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plen = sizeof(struct fsmheader) + count;
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lh.code = code;
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lh.id = id;
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lh.length = htons(plen);
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bp = mballoc(plen, MB_FSM);
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memcpy(MBUF_CTOP(bp), &lh, sizeof(struct fsmheader));
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if (count)
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memcpy(MBUF_CTOP(bp) + sizeof(struct fsmheader), ptr, count);
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LogDumpBp(LogDEBUG, "FsmOutput", bp);
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HdlcOutput(fp->link, PRI_LINK, fp->proto, bp);
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}
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static void
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FsmOpenNow(void *v)
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{
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struct fsm *fp = (struct fsm *)v;
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StopTimer(&fp->OpenTimer);
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if (fp->state <= ST_STOPPED) {
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FsmInitRestartCounter(fp);
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FsmSendConfigReq(fp);
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NewState(fp, ST_REQSENT);
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}
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}
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void
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FsmOpen(struct fsm * fp)
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{
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switch (fp->state) {
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case ST_INITIAL:
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NewState(fp, ST_STARTING);
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(*fp->fn->LayerStart)(fp);
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(*fp->parent->LayerStart)(fp->parent->object, fp);
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break;
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case ST_CLOSED:
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if (fp->open_mode == OPEN_PASSIVE) {
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NewState(fp, ST_STOPPED);
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} else if (fp->open_mode > 0) {
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if (fp->open_mode > 1)
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LogPrintf(LogPHASE, "Entering STOPPED state for %d seconds\n",
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fp->open_mode);
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NewState(fp, ST_STOPPED);
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fp->OpenTimer.state = TIMER_STOPPED;
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fp->OpenTimer.load = fp->open_mode * SECTICKS;
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fp->OpenTimer.func = FsmOpenNow;
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fp->OpenTimer.arg = (void *)fp;
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StartTimer(&fp->OpenTimer);
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} else
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FsmOpenNow(fp);
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break;
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case ST_STOPPED: /* XXX: restart option */
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case ST_REQSENT:
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case ST_ACKRCVD:
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case ST_ACKSENT:
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case ST_OPENED: /* XXX: restart option */
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break;
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case ST_CLOSING: /* XXX: restart option */
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case ST_STOPPING: /* XXX: restart option */
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NewState(fp, ST_STOPPING);
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break;
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}
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}
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void
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FsmUp(struct fsm * fp)
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{
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switch (fp->state) {
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case ST_INITIAL:
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NewState(fp, ST_CLOSED);
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break;
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case ST_STARTING:
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FsmInitRestartCounter(fp);
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FsmSendConfigReq(fp);
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NewState(fp, ST_REQSENT);
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break;
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default:
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LogPrintf(fp->LogLevel, "Oops, Up at %s\n", State2Nam(fp->state));
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break;
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}
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}
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void
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FsmDown(struct fsm *fp)
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{
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switch (fp->state) {
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case ST_CLOSED:
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NewState(fp, ST_INITIAL);
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break;
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case ST_CLOSING:
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(*fp->fn->LayerFinish)(fp);
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NewState(fp, ST_INITIAL);
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(*fp->parent->LayerFinish)(fp->parent->object, fp);
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break;
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case ST_STOPPED:
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NewState(fp, ST_STARTING);
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(*fp->fn->LayerStart)(fp);
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(*fp->parent->LayerStart)(fp->parent->object, fp);
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break;
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case ST_STOPPING:
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case ST_REQSENT:
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case ST_ACKRCVD:
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case ST_ACKSENT:
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NewState(fp, ST_STARTING);
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break;
|
|
case ST_OPENED:
|
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(*fp->fn->LayerDown)(fp);
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NewState(fp, ST_STARTING);
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(*fp->parent->LayerDown)(fp->parent->object, fp);
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break;
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|
}
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|
}
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|
|
|
void
|
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FsmClose(struct fsm *fp)
|
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{
|
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switch (fp->state) {
|
|
case ST_STARTING:
|
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(*fp->fn->LayerFinish)(fp);
|
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NewState(fp, ST_INITIAL);
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(*fp->parent->LayerFinish)(fp->parent->object, fp);
|
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break;
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case ST_STOPPED:
|
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NewState(fp, ST_CLOSED);
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break;
|
|
case ST_STOPPING:
|
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NewState(fp, ST_CLOSING);
|
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break;
|
|
case ST_OPENED:
|
|
(*fp->fn->LayerDown)(fp);
|
|
FsmInitRestartCounter(fp);
|
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FsmSendTerminateReq(fp);
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NewState(fp, ST_CLOSING);
|
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(*fp->parent->LayerDown)(fp->parent->object, fp);
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break;
|
|
case ST_REQSENT:
|
|
case ST_ACKRCVD:
|
|
case ST_ACKSENT:
|
|
FsmInitRestartCounter(fp);
|
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FsmSendTerminateReq(fp);
|
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NewState(fp, ST_CLOSING);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Send functions
|
|
*/
|
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static void
|
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FsmSendConfigReq(struct fsm * fp)
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|
{
|
|
if (--fp->maxconfig > 0) {
|
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(*fp->fn->SendConfigReq)(fp);
|
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StartTimer(&fp->FsmTimer); /* Start restart timer */
|
|
fp->restart--; /* Decrement restart counter */
|
|
} else {
|
|
FsmClose(fp);
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|
}
|
|
}
|
|
|
|
static void
|
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FsmSendTerminateReq(struct fsm *fp)
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|
{
|
|
FsmOutput(fp, CODE_TERMREQ, fp->reqid, NULL, 0);
|
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(*fp->fn->SentTerminateReq)(fp);
|
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StartTimer(&fp->FsmTimer); /* Start restart timer */
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fp->restart--; /* Decrement restart counter */
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}
|
|
|
|
/*
|
|
* Timeout actions
|
|
*/
|
|
static void
|
|
FsmTimeout(void *v)
|
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{
|
|
struct fsm *fp = (struct fsm *)v;
|
|
|
|
if (fp->restart) {
|
|
switch (fp->state) {
|
|
case ST_CLOSING:
|
|
case ST_STOPPING:
|
|
FsmSendTerminateReq(fp);
|
|
break;
|
|
case ST_REQSENT:
|
|
case ST_ACKSENT:
|
|
FsmSendConfigReq(fp);
|
|
break;
|
|
case ST_ACKRCVD:
|
|
FsmSendConfigReq(fp);
|
|
NewState(fp, ST_REQSENT);
|
|
break;
|
|
}
|
|
StartTimer(&fp->FsmTimer);
|
|
} else {
|
|
switch (fp->state) {
|
|
case ST_CLOSING:
|
|
(*fp->fn->LayerFinish)(fp);
|
|
NewState(fp, ST_CLOSED);
|
|
(*fp->parent->LayerFinish)(fp->parent->object, fp);
|
|
break;
|
|
case ST_STOPPING:
|
|
(*fp->fn->LayerFinish)(fp);
|
|
NewState(fp, ST_STOPPED);
|
|
(*fp->parent->LayerFinish)(fp->parent->object, fp);
|
|
break;
|
|
case ST_REQSENT: /* XXX: 3p */
|
|
case ST_ACKSENT:
|
|
case ST_ACKRCVD:
|
|
(*fp->fn->LayerFinish)(fp);
|
|
NewState(fp, ST_STOPPED);
|
|
(*fp->parent->LayerFinish)(fp->parent->object, fp);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
FsmInitRestartCounter(struct fsm * fp)
|
|
{
|
|
StopTimer(&fp->FsmTimer);
|
|
fp->FsmTimer.state = TIMER_STOPPED;
|
|
fp->FsmTimer.func = FsmTimeout;
|
|
fp->FsmTimer.arg = (void *) fp;
|
|
(*fp->fn->InitRestartCounter)(fp);
|
|
}
|
|
|
|
/*
|
|
* Actions when receive packets
|
|
*/
|
|
static void
|
|
FsmRecvConfigReq(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
|
|
/* RCR */
|
|
{
|
|
struct fsm_decode dec;
|
|
int plen, flen;
|
|
int ackaction = 0;
|
|
|
|
plen = plength(bp);
|
|
flen = ntohs(lhp->length) - sizeof *lhp;
|
|
if (plen < flen) {
|
|
LogPrintf(LogERROR, "FsmRecvConfigReq: plen (%d) < flen (%d)\n",
|
|
plen, flen);
|
|
pfree(bp);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Check and process easy case
|
|
*/
|
|
switch (fp->state) {
|
|
case ST_INITIAL:
|
|
case ST_STARTING:
|
|
LogPrintf(fp->LogLevel, "Oops, RCR in %s.\n", State2Nam(fp->state));
|
|
pfree(bp);
|
|
return;
|
|
case ST_CLOSED:
|
|
(*fp->fn->SendTerminateAck)(fp, lhp->id);
|
|
pfree(bp);
|
|
return;
|
|
case ST_CLOSING:
|
|
LogPrintf(fp->LogLevel, "Error: Got ConfigReq while state = %d\n",
|
|
fp->state);
|
|
case ST_STOPPING:
|
|
pfree(bp);
|
|
return;
|
|
}
|
|
|
|
dec.ackend = dec.ack;
|
|
dec.nakend = dec.nak;
|
|
dec.rejend = dec.rej;
|
|
(*fp->fn->DecodeConfig)(fp, MBUF_CTOP(bp), flen, MODE_REQ, &dec);
|
|
if (flen < sizeof(struct fsmconfig))
|
|
LogPrintf(fp->LogLevel, " [EMPTY]\n");
|
|
|
|
if (dec.nakend == dec.nak && dec.rejend == dec.rej)
|
|
ackaction = 1;
|
|
|
|
switch (fp->state) {
|
|
case ST_OPENED:
|
|
(*fp->fn->LayerDown)(fp);
|
|
FsmSendConfigReq(fp);
|
|
(*fp->parent->LayerDown)(fp->parent->object, fp);
|
|
break;
|
|
case ST_STOPPED:
|
|
FsmInitRestartCounter(fp);
|
|
FsmSendConfigReq(fp);
|
|
break;
|
|
}
|
|
|
|
if (dec.rejend != dec.rej)
|
|
FsmOutput(fp, CODE_CONFIGREJ, lhp->id, dec.rej, dec.rejend - dec.rej);
|
|
if (dec.nakend != dec.nak)
|
|
FsmOutput(fp, CODE_CONFIGNAK, lhp->id, dec.nak, dec.nakend - dec.nak);
|
|
if (ackaction)
|
|
FsmOutput(fp, CODE_CONFIGACK, lhp->id, dec.ack, dec.ackend - dec.ack);
|
|
|
|
switch (fp->state) {
|
|
case ST_OPENED:
|
|
case ST_STOPPED:
|
|
if (ackaction)
|
|
NewState(fp, ST_ACKSENT);
|
|
else
|
|
NewState(fp, ST_REQSENT);
|
|
break;
|
|
case ST_REQSENT:
|
|
if (ackaction)
|
|
NewState(fp, ST_ACKSENT);
|
|
break;
|
|
case ST_ACKRCVD:
|
|
if (ackaction) {
|
|
NewState(fp, ST_OPENED);
|
|
(*fp->fn->LayerUp)(fp);
|
|
(*fp->parent->LayerUp)(fp->parent->object, fp);
|
|
}
|
|
break;
|
|
case ST_ACKSENT:
|
|
if (!ackaction)
|
|
NewState(fp, ST_REQSENT);
|
|
break;
|
|
}
|
|
pfree(bp);
|
|
}
|
|
|
|
static void
|
|
FsmRecvConfigAck(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
|
|
/* RCA */
|
|
{
|
|
switch (fp->state) {
|
|
case ST_CLOSED:
|
|
case ST_STOPPED:
|
|
(*fp->fn->SendTerminateAck)(fp, lhp->id);
|
|
break;
|
|
case ST_CLOSING:
|
|
case ST_STOPPING:
|
|
break;
|
|
case ST_REQSENT:
|
|
FsmInitRestartCounter(fp);
|
|
NewState(fp, ST_ACKRCVD);
|
|
break;
|
|
case ST_ACKRCVD:
|
|
FsmSendConfigReq(fp);
|
|
NewState(fp, ST_REQSENT);
|
|
break;
|
|
case ST_ACKSENT:
|
|
FsmInitRestartCounter(fp);
|
|
NewState(fp, ST_OPENED);
|
|
(*fp->fn->LayerUp)(fp);
|
|
(*fp->parent->LayerUp)(fp->parent->object, fp);
|
|
break;
|
|
case ST_OPENED:
|
|
(*fp->fn->LayerDown)(fp);
|
|
FsmSendConfigReq(fp);
|
|
NewState(fp, ST_REQSENT);
|
|
(*fp->parent->LayerDown)(fp->parent->object, fp);
|
|
break;
|
|
}
|
|
pfree(bp);
|
|
}
|
|
|
|
static void
|
|
FsmRecvConfigNak(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
|
|
/* RCN */
|
|
{
|
|
struct fsm_decode dec;
|
|
int plen, flen;
|
|
|
|
plen = plength(bp);
|
|
flen = ntohs(lhp->length) - sizeof *lhp;
|
|
if (plen < flen) {
|
|
pfree(bp);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Check and process easy case
|
|
*/
|
|
switch (fp->state) {
|
|
case ST_INITIAL:
|
|
case ST_STARTING:
|
|
LogPrintf(fp->LogLevel, "Oops, RCN in %s.\n", State2Nam(fp->state));
|
|
pfree(bp);
|
|
return;
|
|
case ST_CLOSED:
|
|
case ST_STOPPED:
|
|
(*fp->fn->SendTerminateAck)(fp, lhp->id);
|
|
pfree(bp);
|
|
return;
|
|
case ST_CLOSING:
|
|
case ST_STOPPING:
|
|
pfree(bp);
|
|
return;
|
|
}
|
|
|
|
dec.ackend = dec.ack;
|
|
dec.nakend = dec.nak;
|
|
dec.rejend = dec.rej;
|
|
(*fp->fn->DecodeConfig)(fp, MBUF_CTOP(bp), flen, MODE_NAK, &dec);
|
|
if (flen < sizeof(struct fsmconfig))
|
|
LogPrintf(fp->LogLevel, " [EMPTY]\n");
|
|
|
|
switch (fp->state) {
|
|
case ST_REQSENT:
|
|
case ST_ACKSENT:
|
|
FsmInitRestartCounter(fp);
|
|
FsmSendConfigReq(fp);
|
|
break;
|
|
case ST_OPENED:
|
|
(*fp->fn->LayerDown)(fp);
|
|
FsmSendConfigReq(fp);
|
|
NewState(fp, ST_REQSENT);
|
|
(*fp->parent->LayerDown)(fp->parent->object, fp);
|
|
break;
|
|
case ST_ACKRCVD:
|
|
FsmSendConfigReq(fp);
|
|
NewState(fp, ST_REQSENT);
|
|
break;
|
|
}
|
|
|
|
pfree(bp);
|
|
}
|
|
|
|
static void
|
|
FsmRecvTermReq(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
|
|
/* RTR */
|
|
{
|
|
switch (fp->state) {
|
|
case ST_INITIAL:
|
|
case ST_STARTING:
|
|
LogPrintf(fp->LogLevel, "Oops, RTR in %s\n", State2Nam(fp->state));
|
|
break;
|
|
case ST_CLOSED:
|
|
case ST_STOPPED:
|
|
case ST_CLOSING:
|
|
case ST_STOPPING:
|
|
case ST_REQSENT:
|
|
(*fp->fn->SendTerminateAck)(fp, lhp->id);
|
|
break;
|
|
case ST_ACKRCVD:
|
|
case ST_ACKSENT:
|
|
(*fp->fn->SendTerminateAck)(fp, lhp->id);
|
|
NewState(fp, ST_REQSENT);
|
|
break;
|
|
case ST_OPENED:
|
|
(*fp->fn->LayerDown)(fp);
|
|
(*fp->fn->SendTerminateAck)(fp, lhp->id);
|
|
StartTimer(&fp->FsmTimer); /* Start restart timer */
|
|
fp->restart = 0;
|
|
NewState(fp, ST_STOPPING);
|
|
(*fp->parent->LayerDown)(fp->parent->object, fp);
|
|
break;
|
|
}
|
|
pfree(bp);
|
|
}
|
|
|
|
static void
|
|
FsmRecvTermAck(struct fsm * fp, struct fsmheader * lhp, struct mbuf * bp)
|
|
/* RTA */
|
|
{
|
|
switch (fp->state) {
|
|
case ST_CLOSING:
|
|
(*fp->fn->LayerFinish)(fp);
|
|
NewState(fp, ST_CLOSED);
|
|
(*fp->parent->LayerFinish)(fp->parent->object, fp);
|
|
break;
|
|
case ST_STOPPING:
|
|
(*fp->fn->LayerFinish)(fp);
|
|
NewState(fp, ST_STOPPED);
|
|
(*fp->parent->LayerFinish)(fp->parent->object, fp);
|
|
break;
|
|
case ST_ACKRCVD:
|
|
NewState(fp, ST_REQSENT);
|
|
break;
|
|
case ST_OPENED:
|
|
(*fp->fn->LayerDown)(fp);
|
|
FsmSendConfigReq(fp);
|
|
NewState(fp, ST_REQSENT);
|
|
(*fp->parent->LayerDown)(fp->parent->object, fp);
|
|
break;
|
|
}
|
|
pfree(bp);
|
|
}
|
|
|
|
static void
|
|
FsmRecvConfigRej(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
|
|
/* RCJ */
|
|
{
|
|
struct fsm_decode dec;
|
|
int plen, flen;
|
|
|
|
plen = plength(bp);
|
|
flen = ntohs(lhp->length) - sizeof *lhp;
|
|
if (plen < flen) {
|
|
pfree(bp);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Check and process easy case
|
|
*/
|
|
switch (fp->state) {
|
|
case ST_INITIAL:
|
|
case ST_STARTING:
|
|
LogPrintf(fp->LogLevel, "Oops, RCJ in %s.\n", State2Nam(fp->state));
|
|
pfree(bp);
|
|
return;
|
|
case ST_CLOSED:
|
|
case ST_STOPPED:
|
|
(*fp->fn->SendTerminateAck)(fp, lhp->id);
|
|
pfree(bp);
|
|
return;
|
|
case ST_CLOSING:
|
|
case ST_STOPPING:
|
|
pfree(bp);
|
|
return;
|
|
}
|
|
|
|
dec.ackend = dec.ack;
|
|
dec.nakend = dec.nak;
|
|
dec.rejend = dec.rej;
|
|
(*fp->fn->DecodeConfig)(fp, MBUF_CTOP(bp), flen, MODE_REJ, &dec);
|
|
if (flen < sizeof(struct fsmconfig))
|
|
LogPrintf(fp->LogLevel, " [EMPTY]\n");
|
|
|
|
switch (fp->state) {
|
|
case ST_REQSENT:
|
|
case ST_ACKSENT:
|
|
FsmInitRestartCounter(fp);
|
|
FsmSendConfigReq(fp);
|
|
break;
|
|
case ST_OPENED:
|
|
(*fp->fn->LayerDown)(fp);
|
|
FsmSendConfigReq(fp);
|
|
NewState(fp, ST_REQSENT);
|
|
(*fp->parent->LayerDown)(fp->parent->object, fp);
|
|
break;
|
|
case ST_ACKRCVD:
|
|
FsmSendConfigReq(fp);
|
|
NewState(fp, ST_REQSENT);
|
|
break;
|
|
}
|
|
pfree(bp);
|
|
}
|
|
|
|
static void
|
|
FsmRecvCodeRej(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
|
|
{
|
|
pfree(bp);
|
|
}
|
|
|
|
static void
|
|
FsmRecvProtoRej(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
|
|
{
|
|
struct physical *p = link2physical(fp->link);
|
|
u_short *sp, proto;
|
|
|
|
sp = (u_short *) MBUF_CTOP(bp);
|
|
proto = ntohs(*sp);
|
|
LogPrintf(fp->LogLevel, "-- Protocol 0x%04x (%s) was rejected.\n",
|
|
proto, hdlc_Protocol2Nam(proto));
|
|
|
|
switch (proto) {
|
|
case PROTO_LQR:
|
|
if (p)
|
|
StopLqr(p, LQM_LQR);
|
|
else
|
|
LogPrintf(LogERROR, "FsmRecvProtoRej: Not a physical link !\n");
|
|
break;
|
|
case PROTO_CCP:
|
|
if (fp->proto == PROTO_LCP) {
|
|
fp = &fp->link->ccp.fsm;
|
|
(*fp->fn->LayerFinish)(fp);
|
|
switch (fp->state) {
|
|
case ST_CLOSED:
|
|
case ST_CLOSING:
|
|
NewState(fp, ST_CLOSED);
|
|
default:
|
|
NewState(fp, ST_STOPPED);
|
|
break;
|
|
}
|
|
(*fp->parent->LayerFinish)(fp->parent->object, fp);
|
|
}
|
|
break;
|
|
}
|
|
pfree(bp);
|
|
}
|
|
|
|
static void
|
|
FsmRecvEchoReq(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
|
|
{
|
|
struct lcp *lcp = fsm2lcp(fp);
|
|
u_char *cp;
|
|
u_long *lp, magic;
|
|
|
|
if (lcp) {
|
|
cp = MBUF_CTOP(bp);
|
|
lp = (u_long *) cp;
|
|
magic = ntohl(*lp);
|
|
if (magic != lcp->his_magic) {
|
|
LogPrintf(LogERROR, "RecvEchoReq: his magic is bad!!\n");
|
|
/* XXX: We should send terminate request */
|
|
}
|
|
if (fp->state == ST_OPENED) {
|
|
*lp = htonl(lcp->want_magic); /* Insert local magic number */
|
|
FsmOutput(fp, CODE_ECHOREP, lhp->id, cp, plength(bp));
|
|
}
|
|
}
|
|
pfree(bp);
|
|
}
|
|
|
|
static void
|
|
FsmRecvEchoRep(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
|
|
{
|
|
struct lcp *lcp = fsm2lcp(fp);
|
|
u_long *lp, magic;
|
|
|
|
if (lcp) {
|
|
lp = (u_long *) MBUF_CTOP(bp);
|
|
magic = ntohl(*lp);
|
|
/* Tolerate echo replies with either magic number */
|
|
if (magic != 0 && magic != lcp->his_magic && magic != lcp->want_magic) {
|
|
LogPrintf(LogWARN,
|
|
"RecvEchoRep: Bad magic: expected 0x%08x, got: 0x%08x\n",
|
|
lcp->his_magic, magic);
|
|
/*
|
|
* XXX: We should send terminate request. But poor implementation may die
|
|
* as a result.
|
|
*/
|
|
}
|
|
RecvEchoLqr(fp, bp);
|
|
}
|
|
pfree(bp);
|
|
}
|
|
|
|
static void
|
|
FsmRecvDiscReq(struct fsm * fp, struct fsmheader * lhp, struct mbuf * bp)
|
|
{
|
|
pfree(bp);
|
|
}
|
|
|
|
static void
|
|
FsmRecvIdent(struct fsm * fp, struct fsmheader * lhp, struct mbuf * bp)
|
|
{
|
|
pfree(bp);
|
|
}
|
|
|
|
static void
|
|
FsmRecvTimeRemain(struct fsm * fp, struct fsmheader * lhp, struct mbuf * bp)
|
|
{
|
|
pfree(bp);
|
|
}
|
|
|
|
static void
|
|
FsmRecvResetReq(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
|
|
{
|
|
(*fp->fn->RecvResetReq)(fp);
|
|
/*
|
|
* All sendable compressed packets are queued in the PRI_NORMAL modem
|
|
* output queue.... dump 'em to the priority queue so that they arrive
|
|
* at the peer before our ResetAck.
|
|
*/
|
|
link_SequenceQueue(fp->link);
|
|
FsmOutput(fp, CODE_RESETACK, lhp->id, NULL, 0);
|
|
pfree(bp);
|
|
}
|
|
|
|
static void
|
|
FsmRecvResetAck(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
|
|
{
|
|
(*fp->fn->RecvResetAck)(fp, lhp->id);
|
|
pfree(bp);
|
|
}
|
|
|
|
void
|
|
FsmInput(struct fsm *fp, struct mbuf *bp)
|
|
{
|
|
int len;
|
|
struct fsmheader *lhp;
|
|
const struct fsmcodedesc *codep;
|
|
|
|
len = plength(bp);
|
|
if (len < sizeof(struct fsmheader)) {
|
|
pfree(bp);
|
|
return;
|
|
}
|
|
lhp = (struct fsmheader *) MBUF_CTOP(bp);
|
|
if (lhp->code < fp->min_code || lhp->code > fp->max_code ||
|
|
lhp->code > sizeof FsmCodes / sizeof *FsmCodes) {
|
|
/*
|
|
* Use a private id. This is really a response-type packet, but we
|
|
* MUST send a unique id for each REQ....
|
|
*/
|
|
static u_char id;
|
|
FsmOutput(fp, CODE_CODEREJ, id++, MBUF_CTOP(bp), bp->cnt);
|
|
pfree(bp);
|
|
return;
|
|
}
|
|
bp->offset += sizeof(struct fsmheader);
|
|
bp->cnt -= sizeof(struct fsmheader);
|
|
|
|
codep = FsmCodes + lhp->code - 1;
|
|
if (lhp->id != fp->reqid && codep->check_reqid &&
|
|
Enabled(fp->bundle, OPT_IDCHECK)) {
|
|
LogPrintf(fp->LogLevel, "Recv%s(%d), dropped (expected %d)\n",
|
|
codep->name, lhp->id, fp->reqid);
|
|
return;
|
|
}
|
|
|
|
LogPrintf(fp->LogLevel, "Recv%s(%d) state = %s\n",
|
|
codep->name, lhp->id, State2Nam(fp->state));
|
|
|
|
if (LogIsKept(LogDEBUG))
|
|
LogMemory();
|
|
|
|
if (codep->inc_reqid && (lhp->id == fp->reqid ||
|
|
(!Enabled(fp->bundle, OPT_IDCHECK) && codep->check_reqid)))
|
|
fp->reqid++; /* That's the end of that ``exchange''.... */
|
|
|
|
(*codep->recv)(fp, lhp, bp);
|
|
|
|
if (LogIsKept(LogDEBUG))
|
|
LogMemory();
|
|
}
|
|
|
|
void
|
|
NullRecvResetReq(struct fsm *fp)
|
|
{
|
|
LogPrintf(fp->LogLevel, "Oops - received unexpected reset req\n");
|
|
}
|
|
|
|
void
|
|
NullRecvResetAck(struct fsm *fp, u_char id)
|
|
{
|
|
LogPrintf(fp->LogLevel, "Oops - received unexpected reset ack\n");
|
|
}
|