2 * Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org>
3 * based on work by Toshiharu OHNO <tony-o@iij.ad.jp>
4 * Internet Initiative Japan, Inc (IIJ)
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/param.h>
32 #include <netinet/in.h>
33 #include <netinet/in_systm.h>
34 #include <netinet/ip.h>
35 #include <sys/socket.h>
51 #include "throughput.h"
52 #include "slcompress.h"
56 #include "descriptor.h"
71 static void FsmSendConfigReq(struct fsm *);
72 static void FsmSendTerminateReq(struct fsm *);
73 static void FsmInitRestartCounter(struct fsm *, int);
75 typedef void (recvfn)(struct fsm *, struct fsmheader *, struct mbuf *);
76 static recvfn FsmRecvConfigReq, FsmRecvConfigAck, FsmRecvConfigNak,
77 FsmRecvConfigRej, FsmRecvTermReq, FsmRecvTermAck,
78 FsmRecvCodeRej, FsmRecvProtoRej, FsmRecvEchoReq,
79 FsmRecvEchoRep, FsmRecvDiscReq, FsmRecvIdent,
80 FsmRecvTimeRemain, FsmRecvResetReq, FsmRecvResetAck;
82 static const struct fsmcodedesc {
84 unsigned check_reqid : 1;
85 unsigned inc_reqid : 1;
88 { FsmRecvConfigReq, 0, 0, "ConfigReq" },
89 { FsmRecvConfigAck, 1, 1, "ConfigAck" },
90 { FsmRecvConfigNak, 1, 1, "ConfigNak" },
91 { FsmRecvConfigRej, 1, 1, "ConfigRej" },
92 { FsmRecvTermReq, 0, 0, "TerminateReq" },
93 { FsmRecvTermAck, 1, 1, "TerminateAck" },
94 { FsmRecvCodeRej, 0, 0, "CodeRej" },
95 { FsmRecvProtoRej, 0, 0, "ProtocolRej" },
96 { FsmRecvEchoReq, 0, 0, "EchoRequest" },
97 { FsmRecvEchoRep, 0, 0, "EchoReply" },
98 { FsmRecvDiscReq, 0, 0, "DiscardReq" },
99 { FsmRecvIdent, 0, 1, "Ident" },
100 { FsmRecvTimeRemain,0, 0, "TimeRemain" },
101 { FsmRecvResetReq, 0, 0, "ResetReq" },
102 { FsmRecvResetAck, 0, 1, "ResetAck" }
108 if (code == 0 || code > sizeof FsmCodes / sizeof FsmCodes[0])
110 return FsmCodes[code-1].name;
114 State2Nam(u_int state)
116 static const char * const StateNames[] = {
117 "Initial", "Starting", "Closed", "Stopped", "Closing", "Stopping",
118 "Req-Sent", "Ack-Rcvd", "Ack-Sent", "Opened",
121 if (state >= sizeof StateNames / sizeof StateNames[0])
123 return StateNames[state];
127 StoppedTimeout(void *v)
129 struct fsm *fp = (struct fsm *)v;
131 log_Printf(fp->LogLevel, "%s: Stopped timer expired\n", fp->link->name);
132 if (fp->OpenTimer.state == TIMER_RUNNING) {
133 log_Printf(LogWARN, "%s: %s: aborting open delay due to stopped timer\n",
134 fp->link->name, fp->name);
135 timer_Stop(&fp->OpenTimer);
137 if (fp->state == ST_STOPPED)
142 fsm_Init(struct fsm *fp, const char *name, u_short proto, int mincode,
143 int maxcode, int LogLevel, struct bundle *bundle,
144 struct link *l, const struct fsm_parent *parent,
145 struct fsm_callbacks *fn, const char * const timer_names[3])
149 fp->min_code = mincode;
150 fp->max_code = maxcode;
151 fp->state = fp->min_code > CODE_TERMACK ? ST_OPENED : ST_INITIAL;
154 fp->more.reqs = fp->more.naks = fp->more.rejs = 3;
155 memset(&fp->FsmTimer, '\0', sizeof fp->FsmTimer);
156 memset(&fp->OpenTimer, '\0', sizeof fp->OpenTimer);
157 memset(&fp->StoppedTimer, '\0', sizeof fp->StoppedTimer);
158 fp->LogLevel = LogLevel;
163 fp->FsmTimer.name = timer_names[0];
164 fp->OpenTimer.name = timer_names[1];
165 fp->StoppedTimer.name = timer_names[2];
169 NewState(struct fsm *fp, int new)
171 log_Printf(fp->LogLevel, "%s: State change %s --> %s\n",
172 fp->link->name, State2Nam(fp->state), State2Nam(new));
173 if (fp->state == ST_STOPPED && fp->StoppedTimer.state == TIMER_RUNNING)
174 timer_Stop(&fp->StoppedTimer);
176 if ((new >= ST_INITIAL && new <= ST_STOPPED) || (new == ST_OPENED)) {
177 timer_Stop(&fp->FsmTimer);
178 if (new == ST_STOPPED && fp->StoppedTimer.load) {
179 timer_Stop(&fp->StoppedTimer);
180 fp->StoppedTimer.func = StoppedTimeout;
181 fp->StoppedTimer.arg = (void *) fp;
182 timer_Start(&fp->StoppedTimer);
188 fsm_Output(struct fsm *fp, u_int code, u_int id, u_char *ptr, unsigned count,
195 if (log_IsKept(fp->LogLevel)) {
196 log_Printf(fp->LogLevel, "%s: Send%s(%d) state = %s\n",
197 fp->link->name, Code2Nam(code), id, State2Nam(fp->state));
203 (*fp->fn->DecodeConfig)(fp, ptr, ptr + count, MODE_NOP, NULL);
204 if (count < sizeof(struct fsm_opt_hdr))
205 log_Printf(fp->LogLevel, " [EMPTY]\n");
210 plen = sizeof(struct fsmheader) + count;
213 lh.length = htons(plen);
214 bp = m_get(plen, mtype);
215 memcpy(MBUF_CTOP(bp), &lh, sizeof(struct fsmheader));
217 memcpy(MBUF_CTOP(bp) + sizeof(struct fsmheader), ptr, count);
218 log_DumpBp(LogDEBUG, "fsm_Output", bp);
219 link_PushPacket(fp->link, bp, fp->bundle, LINK_QUEUES(fp->link) - 1,
222 if (code == CODE_CONFIGREJ)
223 lcp_SendIdentification(&fp->link->lcp);
229 struct fsm *fp = (struct fsm *)v;
231 timer_Stop(&fp->OpenTimer);
232 if (fp->state <= ST_STOPPED) {
233 if (fp->state != ST_STARTING) {
235 * In practice, we're only here in ST_STOPPED (when delaying the
236 * first config request) or ST_CLOSED (when openmode == 0).
238 * The ST_STOPPED bit is breaking the RFC already :-(
240 * According to the RFC (1661) state transition table, a TLS isn't
241 * required for an Open event when state == Closed, but the RFC
242 * must be wrong as TLS hasn't yet been called (since the last TLF)
243 * ie, Initial gets an `Up' event, Closing gets a RTA etc.
245 (*fp->fn->LayerStart)(fp);
246 (*fp->parent->LayerStart)(fp->parent->object, fp);
248 FsmInitRestartCounter(fp, FSM_REQ_TIMER);
249 FsmSendConfigReq(fp);
250 NewState(fp, ST_REQSENT);
255 fsm_Open(struct fsm *fp)
259 NewState(fp, ST_STARTING);
260 (*fp->fn->LayerStart)(fp);
261 (*fp->parent->LayerStart)(fp->parent->object, fp);
264 if (fp->open_mode == OPEN_PASSIVE) {
265 NewState(fp, ST_STOPPED); /* XXX: This is a hack ! */
266 } else if (fp->open_mode > 0) {
267 if (fp->open_mode > 1)
268 log_Printf(LogPHASE, "%s: Entering STOPPED state for %d seconds\n",
269 fp->link->name, fp->open_mode);
270 NewState(fp, ST_STOPPED); /* XXX: This is a not-so-bad hack ! */
271 timer_Stop(&fp->OpenTimer);
272 fp->OpenTimer.load = fp->open_mode * SECTICKS;
273 fp->OpenTimer.func = FsmOpenNow;
274 fp->OpenTimer.arg = (void *)fp;
275 timer_Start(&fp->OpenTimer);
279 case ST_STOPPED: /* XXX: restart option */
283 case ST_OPENED: /* XXX: restart option */
285 case ST_CLOSING: /* XXX: restart option */
286 case ST_STOPPING: /* XXX: restart option */
287 NewState(fp, ST_STOPPING);
293 fsm_Up(struct fsm *fp)
297 log_Printf(fp->LogLevel, "FSM: Using \"%s\" as a transport\n",
299 NewState(fp, ST_CLOSED);
302 FsmInitRestartCounter(fp, FSM_REQ_TIMER);
303 FsmSendConfigReq(fp);
304 NewState(fp, ST_REQSENT);
307 log_Printf(fp->LogLevel, "%s: Oops, Up at %s\n",
308 fp->link->name, State2Nam(fp->state));
314 fsm_Down(struct fsm *fp)
318 NewState(fp, ST_INITIAL);
321 /* This TLF contradicts the RFC (1661), which ``misses it out'' ! */
322 (*fp->fn->LayerFinish)(fp);
323 NewState(fp, ST_INITIAL);
324 (*fp->parent->LayerFinish)(fp->parent->object, fp);
327 NewState(fp, ST_STARTING);
328 (*fp->fn->LayerStart)(fp);
329 (*fp->parent->LayerStart)(fp->parent->object, fp);
335 NewState(fp, ST_STARTING);
338 (*fp->fn->LayerDown)(fp);
339 NewState(fp, ST_STARTING);
340 (*fp->parent->LayerDown)(fp->parent->object, fp);
346 fsm_Close(struct fsm *fp)
350 (*fp->fn->LayerFinish)(fp);
351 NewState(fp, ST_INITIAL);
352 (*fp->parent->LayerFinish)(fp->parent->object, fp);
355 NewState(fp, ST_CLOSED);
358 NewState(fp, ST_CLOSING);
361 (*fp->fn->LayerDown)(fp);
362 if (fp->state == ST_OPENED) {
363 FsmInitRestartCounter(fp, FSM_TRM_TIMER);
364 FsmSendTerminateReq(fp);
365 NewState(fp, ST_CLOSING);
366 (*fp->parent->LayerDown)(fp->parent->object, fp);
372 FsmInitRestartCounter(fp, FSM_TRM_TIMER);
373 FsmSendTerminateReq(fp);
374 NewState(fp, ST_CLOSING);
383 FsmSendConfigReq(struct fsm *fp)
385 if (fp->more.reqs-- > 0 && fp->restart-- > 0) {
386 (*fp->fn->SendConfigReq)(fp);
387 timer_Start(&fp->FsmTimer); /* Start restart timer */
389 if (fp->more.reqs < 0)
390 log_Printf(LogPHASE, "%s: Too many %s REQs sent - abandoning "
391 "negotiation\n", fp->link->name, fp->name);
392 lcp_SendIdentification(&fp->link->lcp);
398 FsmSendTerminateReq(struct fsm *fp)
400 fsm_Output(fp, CODE_TERMREQ, fp->reqid, NULL, 0, MB_UNKNOWN);
401 (*fp->fn->SentTerminateReq)(fp);
402 timer_Start(&fp->FsmTimer); /* Start restart timer */
403 fp->restart--; /* Decrement restart counter */
412 struct fsm *fp = (struct fsm *)v;
418 FsmSendTerminateReq(fp);
422 FsmSendConfigReq(fp);
425 FsmSendConfigReq(fp);
426 NewState(fp, ST_REQSENT);
429 timer_Start(&fp->FsmTimer);
433 (*fp->fn->LayerFinish)(fp);
434 NewState(fp, ST_CLOSED);
435 (*fp->parent->LayerFinish)(fp->parent->object, fp);
438 (*fp->fn->LayerFinish)(fp);
439 NewState(fp, ST_STOPPED);
440 (*fp->parent->LayerFinish)(fp->parent->object, fp);
442 case ST_REQSENT: /* XXX: 3p */
445 (*fp->fn->LayerFinish)(fp);
446 NewState(fp, ST_STOPPED);
447 (*fp->parent->LayerFinish)(fp->parent->object, fp);
454 FsmInitRestartCounter(struct fsm *fp, int what)
456 timer_Stop(&fp->FsmTimer);
457 fp->FsmTimer.func = FsmTimeout;
458 fp->FsmTimer.arg = (void *)fp;
459 (*fp->fn->InitRestartCounter)(fp, what);
463 * Actions when receive packets
466 FsmRecvConfigReq(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
469 struct fsm_decode dec;
476 flen = ntohs(lhp->length) - sizeof *lhp;
478 log_Printf(LogWARN, "%s: FsmRecvConfigReq: plen (%d) < flen (%d)\n",
479 fp->link->name, plen, flen);
484 /* Some things must be done before we Decode the packet */
487 (*fp->fn->LayerDown)(fp);
490 dec.ackend = dec.ack;
491 dec.nakend = dec.nak;
492 dec.rejend = dec.rej;
494 (*fp->fn->DecodeConfig)(fp, cp, cp + flen, MODE_REQ, &dec);
495 if (flen < (int)sizeof(struct fsm_opt_hdr))
496 log_Printf(fp->LogLevel, " [EMPTY]\n");
498 if (dec.nakend == dec.nak && dec.rejend == dec.rej)
501 /* Check and process easy case */
504 if (fp->proto == PROTO_CCP && fp->link->lcp.fsm.state == ST_OPENED) {
506 * ccp_SetOpenMode() leaves us in initial if we're disabling
507 * & denying everything.
509 bp = m_prepend(bp, lhp, sizeof *lhp, 2);
510 bp = proto_Prepend(bp, fp->proto, 0, 0);
512 lcp_SendProtoRej(&fp->link->lcp, MBUF_CTOP(bp), bp->m_len);
518 log_Printf(fp->LogLevel, "%s: Oops, RCR in %s.\n",
519 fp->link->name, State2Nam(fp->state));
523 (*fp->fn->SendTerminateAck)(fp, lhp->id);
527 log_Printf(fp->LogLevel, "%s: Error: Got ConfigReq while state = %s\n",
528 fp->link->name, State2Nam(fp->state));
533 FsmInitRestartCounter(fp, FSM_REQ_TIMER);
536 FsmSendConfigReq(fp);
540 if (dec.rejend != dec.rej)
541 fsm_Output(fp, CODE_CONFIGREJ, lhp->id, dec.rej, dec.rejend - dec.rej,
543 if (dec.nakend != dec.nak)
544 fsm_Output(fp, CODE_CONFIGNAK, lhp->id, dec.nak, dec.nakend - dec.nak,
547 fsm_Output(fp, CODE_CONFIGACK, lhp->id, dec.ack, dec.ackend - dec.ack,
553 * According to the RFC (1661) state transition table, a TLS isn't
554 * required for a RCR when state == ST_STOPPED, but the RFC
555 * must be wrong as TLS hasn't yet been called (since the last TLF)
557 (*fp->fn->LayerStart)(fp);
558 (*fp->parent->LayerStart)(fp->parent->object, fp);
563 NewState(fp, ST_ACKSENT);
565 NewState(fp, ST_REQSENT);
566 (*fp->parent->LayerDown)(fp->parent->object, fp);
570 NewState(fp, ST_ACKSENT);
574 NewState(fp, ST_OPENED);
575 if ((*fp->fn->LayerUp)(fp))
576 (*fp->parent->LayerUp)(fp->parent->object, fp);
578 (*fp->fn->LayerDown)(fp);
579 FsmInitRestartCounter(fp, FSM_TRM_TIMER);
580 FsmSendTerminateReq(fp);
581 NewState(fp, ST_CLOSING);
582 lcp_SendIdentification(&fp->link->lcp);
588 NewState(fp, ST_REQSENT);
593 if (dec.rejend != dec.rej && --fp->more.rejs <= 0) {
594 log_Printf(LogPHASE, "%s: Too many %s REJs sent - abandoning negotiation\n",
595 fp->link->name, fp->name);
596 lcp_SendIdentification(&fp->link->lcp);
600 if (dec.nakend != dec.nak && --fp->more.naks <= 0) {
601 log_Printf(LogPHASE, "%s: Too many %s NAKs sent - abandoning negotiation\n",
602 fp->link->name, fp->name);
603 lcp_SendIdentification(&fp->link->lcp);
609 FsmRecvConfigAck(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
612 struct fsm_decode dec;
617 flen = ntohs(lhp->length) - sizeof *lhp;
624 dec.ackend = dec.ack;
625 dec.nakend = dec.nak;
626 dec.rejend = dec.rej;
628 (*fp->fn->DecodeConfig)(fp, cp, cp + flen, MODE_ACK, &dec);
629 if (flen < (int)sizeof(struct fsm_opt_hdr))
630 log_Printf(fp->LogLevel, " [EMPTY]\n");
635 (*fp->fn->SendTerminateAck)(fp, lhp->id);
641 FsmInitRestartCounter(fp, FSM_REQ_TIMER);
642 NewState(fp, ST_ACKRCVD);
645 FsmSendConfigReq(fp);
646 NewState(fp, ST_REQSENT);
649 FsmInitRestartCounter(fp, FSM_REQ_TIMER);
650 NewState(fp, ST_OPENED);
651 if ((*fp->fn->LayerUp)(fp))
652 (*fp->parent->LayerUp)(fp->parent->object, fp);
654 (*fp->fn->LayerDown)(fp);
655 FsmInitRestartCounter(fp, FSM_TRM_TIMER);
656 FsmSendTerminateReq(fp);
657 NewState(fp, ST_CLOSING);
658 lcp_SendIdentification(&fp->link->lcp);
662 (*fp->fn->LayerDown)(fp);
663 FsmSendConfigReq(fp);
664 NewState(fp, ST_REQSENT);
665 (*fp->parent->LayerDown)(fp->parent->object, fp);
672 FsmRecvConfigNak(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
675 struct fsm_decode dec;
680 flen = ntohs(lhp->length) - sizeof *lhp;
687 * Check and process easy case
692 log_Printf(fp->LogLevel, "%s: Oops, RCN in %s.\n",
693 fp->link->name, State2Nam(fp->state));
698 (*fp->fn->SendTerminateAck)(fp, lhp->id);
708 dec.ackend = dec.ack;
709 dec.nakend = dec.nak;
710 dec.rejend = dec.rej;
712 (*fp->fn->DecodeConfig)(fp, cp, cp + flen, MODE_NAK, &dec);
713 if (flen < (int)sizeof(struct fsm_opt_hdr))
714 log_Printf(fp->LogLevel, " [EMPTY]\n");
719 FsmInitRestartCounter(fp, FSM_REQ_TIMER);
720 FsmSendConfigReq(fp);
723 (*fp->fn->LayerDown)(fp);
724 FsmSendConfigReq(fp);
725 NewState(fp, ST_REQSENT);
726 (*fp->parent->LayerDown)(fp->parent->object, fp);
729 FsmSendConfigReq(fp);
730 NewState(fp, ST_REQSENT);
738 FsmRecvTermReq(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
744 log_Printf(fp->LogLevel, "%s: Oops, RTR in %s\n",
745 fp->link->name, State2Nam(fp->state));
752 (*fp->fn->SendTerminateAck)(fp, lhp->id);
756 (*fp->fn->SendTerminateAck)(fp, lhp->id);
757 NewState(fp, ST_REQSENT);
760 (*fp->fn->LayerDown)(fp);
761 (*fp->fn->SendTerminateAck)(fp, lhp->id);
762 FsmInitRestartCounter(fp, FSM_TRM_TIMER);
763 timer_Start(&fp->FsmTimer); /* Start restart timer */
765 NewState(fp, ST_STOPPING);
766 (*fp->parent->LayerDown)(fp->parent->object, fp);
767 /* A delayed ST_STOPPED is now scheduled */
774 FsmRecvTermAck(struct fsm *fp, struct fsmheader *lhp __unused, struct mbuf *bp)
779 (*fp->fn->LayerFinish)(fp);
780 NewState(fp, ST_CLOSED);
781 (*fp->parent->LayerFinish)(fp->parent->object, fp);
784 (*fp->fn->LayerFinish)(fp);
785 NewState(fp, ST_STOPPED);
786 (*fp->parent->LayerFinish)(fp->parent->object, fp);
789 NewState(fp, ST_REQSENT);
792 (*fp->fn->LayerDown)(fp);
793 FsmSendConfigReq(fp);
794 NewState(fp, ST_REQSENT);
795 (*fp->parent->LayerDown)(fp->parent->object, fp);
802 FsmRecvConfigRej(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
805 struct fsm_decode dec;
811 flen = ntohs(lhp->length) - sizeof *lhp;
812 if ((int)plen < flen) {
817 lcp_SendIdentification(&fp->link->lcp);
820 * Check and process easy case
825 log_Printf(fp->LogLevel, "%s: Oops, RCJ in %s.\n",
826 fp->link->name, State2Nam(fp->state));
831 (*fp->fn->SendTerminateAck)(fp, lhp->id);
841 dec.ackend = dec.ack;
842 dec.nakend = dec.nak;
843 dec.rejend = dec.rej;
845 (*fp->fn->DecodeConfig)(fp, cp, cp + flen, MODE_REJ, &dec);
846 if (flen < (int)sizeof(struct fsm_opt_hdr))
847 log_Printf(fp->LogLevel, " [EMPTY]\n");
852 FsmInitRestartCounter(fp, FSM_REQ_TIMER);
853 FsmSendConfigReq(fp);
856 (*fp->fn->LayerDown)(fp);
857 FsmSendConfigReq(fp);
858 NewState(fp, ST_REQSENT);
859 (*fp->parent->LayerDown)(fp->parent->object, fp);
862 FsmSendConfigReq(fp);
863 NewState(fp, ST_REQSENT);
870 FsmRecvCodeRej(struct fsm *fp __unused, struct fsmheader *lhp __unused,
877 FsmRecvProtoRej(struct fsm *fp, struct fsmheader *lhp __unused, struct mbuf *bp)
879 struct physical *p = link2physical(fp->link);
882 if (m_length(bp) < 2) {
886 bp = mbuf_Read(bp, &proto, 2);
887 proto = ntohs(proto);
888 log_Printf(fp->LogLevel, "%s: -- Protocol 0x%04x (%s) was rejected!\n",
889 fp->link->name, proto, hdlc_Protocol2Nam(proto));
894 lqr_Stop(p, LQM_LQR);
896 log_Printf(LogERROR, "%s: FsmRecvProtoRej: Not a physical link !\n",
900 if (fp->proto == PROTO_LCP) {
901 fp = &fp->link->ccp.fsm;
902 /* Despite the RFC (1661), don't do an out-of-place TLF */
903 /* (*fp->fn->LayerFinish)(fp); */
907 NewState(fp, ST_CLOSED);
910 NewState(fp, ST_STOPPED);
914 /* (*fp->parent->LayerFinish)(fp->parent->object, fp); */
918 if (fp->proto == PROTO_LCP) {
919 log_Printf(LogPHASE, "%s: IPCP protocol reject closes IPCP !\n",
921 fsm_Close(&fp->bundle->ncp.ipcp.fsm);
926 if (fp->proto == PROTO_LCP) {
927 log_Printf(LogPHASE, "%s: IPV6CP protocol reject closes IPV6CP !\n",
929 fsm_Close(&fp->bundle->ncp.ipv6cp.fsm);
934 if (fp->proto == PROTO_LCP) {
935 struct lcp *lcp = fsm2lcp(fp);
937 if (lcp->want_mrru && lcp->his_mrru) {
938 log_Printf(LogPHASE, "%s: MP protocol reject is fatal !\n",
949 FsmRecvEchoReq(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
951 struct lcp *lcp = fsm2lcp(fp);
956 m_settype(bp, MB_ECHOIN);
958 if (lcp && ntohs(lhp->length) - sizeof *lhp >= 4) {
960 ua_ntohl(cp, &magic);
961 if (magic != lcp->his_magic) {
962 log_Printf(fp->LogLevel, "%s: RecvEchoReq: magic 0x%08lx is wrong,"
963 " expecting 0x%08lx\n", fp->link->name, (u_long)magic,
964 (u_long)lcp->his_magic);
965 /* XXX: We should send terminate request */
967 if (fp->state == ST_OPENED) {
968 ua_htonl(&lcp->want_magic, cp); /* local magic */
969 fsm_Output(fp, CODE_ECHOREP, lhp->id, cp,
970 ntohs(lhp->length) - sizeof *lhp, MB_ECHOOUT);
977 FsmRecvEchoRep(struct fsm *fp, struct fsmheader *lhp __unused, struct mbuf *bp)
980 bp = lqr_RecvEcho(fp, bp);
986 FsmRecvDiscReq(struct fsm *fp __unused, struct fsmheader *lhp __unused,
993 FsmRecvIdent(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
999 len = ntohs(lhp->length) - sizeof *lhp;
1001 bp = m_pullup(m_append(bp, "", 1));
1003 ua_ntohl(cp, &magic);
1004 if (magic != fp->link->lcp.his_magic)
1005 log_Printf(fp->LogLevel, "%s: RecvIdent: magic 0x%08lx is wrong,"
1006 " expecting 0x%08lx\n", fp->link->name, (u_long)magic,
1007 (u_long)fp->link->lcp.his_magic);
1009 lcp_RecvIdentification(&fp->link->lcp, cp + 4);
1015 FsmRecvTimeRemain(struct fsm *fp __unused, struct fsmheader *lhp __unused,
1022 FsmRecvResetReq(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
1024 if ((*fp->fn->RecvResetReq)(fp)) {
1026 * All sendable compressed packets are queued in the first (lowest
1027 * priority) modem output queue.... dump 'em to the priority queue
1028 * so that they arrive at the peer before our ResetAck.
1030 link_SequenceQueue(fp->link);
1031 fsm_Output(fp, CODE_RESETACK, lhp->id, NULL, 0, MB_CCPOUT);
1037 FsmRecvResetAck(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
1039 (*fp->fn->RecvResetAck)(fp, lhp->id);
1044 fsm_Input(struct fsm *fp, struct mbuf *bp)
1047 struct fsmheader lh;
1048 const struct fsmcodedesc *codep;
1051 if (len < sizeof(struct fsmheader)) {
1055 bp = mbuf_Read(bp, &lh, sizeof lh);
1057 if (ntohs(lh.length) > len) {
1058 log_Printf(LogWARN, "%s: Oops: Got %zu bytes but %d byte payload "
1059 "- dropped\n", fp->link->name, len, (int)ntohs(lh.length));
1064 if (lh.code < fp->min_code || lh.code > fp->max_code ||
1065 lh.code > sizeof FsmCodes / sizeof *FsmCodes) {
1067 * Use a private id. This is really a response-type packet, but we
1068 * MUST send a unique id for each REQ....
1072 bp = m_prepend(bp, &lh, sizeof lh, 0);
1074 fsm_Output(fp, CODE_CODEREJ, id++, MBUF_CTOP(bp), bp->m_len, MB_UNKNOWN);
1079 codep = FsmCodes + lh.code - 1;
1080 if (lh.id != fp->reqid && codep->check_reqid &&
1081 Enabled(fp->bundle, OPT_IDCHECK)) {
1082 log_Printf(fp->LogLevel, "%s: Recv%s(%d), dropped (expected %d)\n",
1083 fp->link->name, codep->name, lh.id, fp->reqid);
1087 log_Printf(fp->LogLevel, "%s: Recv%s(%d) state = %s\n",
1088 fp->link->name, codep->name, lh.id, State2Nam(fp->state));
1090 if (codep->inc_reqid && (lh.id == fp->reqid ||
1091 (!Enabled(fp->bundle, OPT_IDCHECK) && codep->check_reqid)))
1092 fp->reqid++; /* That's the end of that ``exchange''.... */
1094 (*codep->recv)(fp, &lh, bp);
1098 fsm_NullRecvResetReq(struct fsm *fp)
1100 log_Printf(fp->LogLevel, "%s: Oops - received unexpected reset req\n",
1106 fsm_NullRecvResetAck(struct fsm *fp, u_char id __unused)
1108 log_Printf(fp->LogLevel, "%s: Oops - received unexpected reset ack\n",
1113 fsm_Reopen(struct fsm *fp)
1115 if (fp->state == ST_OPENED) {
1116 (*fp->fn->LayerDown)(fp);
1117 FsmInitRestartCounter(fp, FSM_REQ_TIMER);
1118 FsmSendConfigReq(fp);
1119 NewState(fp, ST_REQSENT);
1120 (*fp->parent->LayerDown)(fp->parent->object, fp);
1125 fsm2initial(struct fsm *fp)
1127 timer_Stop(&fp->FsmTimer);
1128 timer_Stop(&fp->OpenTimer);
1129 timer_Stop(&fp->StoppedTimer);
1130 if (fp->state == ST_STOPPED)
1132 if (fp->state > ST_INITIAL)
1134 if (fp->state > ST_INITIAL)
1139 fsm_readopt(u_char **cp)
1141 struct fsm_opt *o = (struct fsm_opt *)*cp;
1143 if (o->hdr.len < sizeof(struct fsm_opt_hdr)) {
1144 log_Printf(LogERROR, "Bad option length %d (out of phase?)\n", o->hdr.len);
1150 if (o->hdr.len > sizeof(struct fsm_opt)) {
1151 log_Printf(LogERROR, "Warning: Truncating option length from %d to %d\n",
1152 o->hdr.len, (int)sizeof(struct fsm_opt));
1153 o->hdr.len = sizeof(struct fsm_opt);
1160 fsm_opt(u_char *opt, int optlen, const struct fsm_opt *o)
1162 unsigned cplen = o->hdr.len;
1164 if (optlen < (int)sizeof(struct fsm_opt_hdr))
1167 if ((int)cplen > optlen) {
1168 log_Printf(LogERROR, "Can't REJ length %d - trunating to %d\n",
1172 memcpy(opt, o, cplen);
1180 fsm_rej(struct fsm_decode *dec, const struct fsm_opt *o)
1184 dec->rejend += fsm_opt(dec->rejend, FSM_OPTLEN - (dec->rejend - dec->rej), o);
1188 fsm_ack(struct fsm_decode *dec, const struct fsm_opt *o)
1192 dec->ackend += fsm_opt(dec->ackend, FSM_OPTLEN - (dec->ackend - dec->ack), o);
1196 fsm_nak(struct fsm_decode *dec, const struct fsm_opt *o)
1200 dec->nakend += fsm_opt(dec->nakend, FSM_OPTLEN - (dec->nakend - dec->nak), o);
1204 fsm_opt_normalise(struct fsm_decode *dec)
1206 if (dec->rejend != dec->rej) {
1207 /* rejects are preferred */
1208 dec->ackend = dec->ack;
1209 dec->nakend = dec->nak;
1210 } else if (dec->nakend != dec->nak)
1212 dec->ackend = dec->ack;