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"
57 #include "descriptor.h"
72 static void FsmSendConfigReq(struct fsm *);
73 static void FsmSendTerminateReq(struct fsm *);
74 static void FsmInitRestartCounter(struct fsm *, int);
76 typedef void (recvfn)(struct fsm *, struct fsmheader *, struct mbuf *);
77 static recvfn FsmRecvConfigReq, FsmRecvConfigAck, FsmRecvConfigNak,
78 FsmRecvConfigRej, FsmRecvTermReq, FsmRecvTermAck,
79 FsmRecvCodeRej, FsmRecvProtoRej, FsmRecvEchoReq,
80 FsmRecvEchoRep, FsmRecvDiscReq, FsmRecvIdent,
81 FsmRecvTimeRemain, FsmRecvResetReq, FsmRecvResetAck;
83 static const struct fsmcodedesc {
85 unsigned check_reqid : 1;
86 unsigned inc_reqid : 1;
89 { FsmRecvConfigReq, 0, 0, "ConfigReq" },
90 { FsmRecvConfigAck, 1, 1, "ConfigAck" },
91 { FsmRecvConfigNak, 1, 1, "ConfigNak" },
92 { FsmRecvConfigRej, 1, 1, "ConfigRej" },
93 { FsmRecvTermReq, 0, 0, "TerminateReq" },
94 { FsmRecvTermAck, 1, 1, "TerminateAck" },
95 { FsmRecvCodeRej, 0, 0, "CodeRej" },
96 { FsmRecvProtoRej, 0, 0, "ProtocolRej" },
97 { FsmRecvEchoReq, 0, 0, "EchoRequest" },
98 { FsmRecvEchoRep, 0, 0, "EchoReply" },
99 { FsmRecvDiscReq, 0, 0, "DiscardReq" },
100 { FsmRecvIdent, 0, 1, "Ident" },
101 { FsmRecvTimeRemain,0, 0, "TimeRemain" },
102 { FsmRecvResetReq, 0, 0, "ResetReq" },
103 { FsmRecvResetAck, 0, 1, "ResetAck" }
109 if (code == 0 || code > sizeof FsmCodes / sizeof FsmCodes[0])
111 return FsmCodes[code-1].name;
115 State2Nam(u_int state)
117 static const char * const StateNames[] = {
118 "Initial", "Starting", "Closed", "Stopped", "Closing", "Stopping",
119 "Req-Sent", "Ack-Rcvd", "Ack-Sent", "Opened",
122 if (state >= sizeof StateNames / sizeof StateNames[0])
124 return StateNames[state];
128 StoppedTimeout(void *v)
130 struct fsm *fp = (struct fsm *)v;
132 log_Printf(fp->LogLevel, "%s: Stopped timer expired\n", fp->link->name);
133 if (fp->OpenTimer.state == TIMER_RUNNING) {
134 log_Printf(LogWARN, "%s: %s: aborting open delay due to stopped timer\n",
135 fp->link->name, fp->name);
136 timer_Stop(&fp->OpenTimer);
138 if (fp->state == ST_STOPPED)
143 fsm_Init(struct fsm *fp, const char *name, u_short proto, int mincode,
144 int maxcode, int LogLevel, struct bundle *bundle,
145 struct link *l, const struct fsm_parent *parent,
146 struct fsm_callbacks *fn, const char * const timer_names[3])
150 fp->min_code = mincode;
151 fp->max_code = maxcode;
152 fp->state = fp->min_code > CODE_TERMACK ? ST_OPENED : ST_INITIAL;
155 fp->more.reqs = fp->more.naks = fp->more.rejs = 3;
156 memset(&fp->FsmTimer, '\0', sizeof fp->FsmTimer);
157 memset(&fp->OpenTimer, '\0', sizeof fp->OpenTimer);
158 memset(&fp->StoppedTimer, '\0', sizeof fp->StoppedTimer);
159 fp->LogLevel = LogLevel;
164 fp->FsmTimer.name = timer_names[0];
165 fp->OpenTimer.name = timer_names[1];
166 fp->StoppedTimer.name = timer_names[2];
170 NewState(struct fsm *fp, int new)
172 log_Printf(fp->LogLevel, "%s: State change %s --> %s\n",
173 fp->link->name, State2Nam(fp->state), State2Nam(new));
174 if (fp->state == ST_STOPPED && fp->StoppedTimer.state == TIMER_RUNNING)
175 timer_Stop(&fp->StoppedTimer);
177 if ((new >= ST_INITIAL && new <= ST_STOPPED) || (new == ST_OPENED)) {
178 timer_Stop(&fp->FsmTimer);
179 if (new == ST_STOPPED && fp->StoppedTimer.load) {
180 timer_Stop(&fp->StoppedTimer);
181 fp->StoppedTimer.func = StoppedTimeout;
182 fp->StoppedTimer.arg = (void *) fp;
183 timer_Start(&fp->StoppedTimer);
189 fsm_Output(struct fsm *fp, u_int code, u_int id, u_char *ptr, int count,
196 if (log_IsKept(fp->LogLevel)) {
197 log_Printf(fp->LogLevel, "%s: Send%s(%d) state = %s\n",
198 fp->link->name, Code2Nam(code), id, State2Nam(fp->state));
204 (*fp->fn->DecodeConfig)(fp, ptr, count, MODE_NOP, NULL);
205 if (count < sizeof(struct fsmconfig))
206 log_Printf(fp->LogLevel, " [EMPTY]\n");
211 plen = sizeof(struct fsmheader) + count;
214 lh.length = htons(plen);
215 bp = m_get(plen, mtype);
216 memcpy(MBUF_CTOP(bp), &lh, sizeof(struct fsmheader));
218 memcpy(MBUF_CTOP(bp) + sizeof(struct fsmheader), ptr, count);
219 log_DumpBp(LogDEBUG, "fsm_Output", bp);
220 link_PushPacket(fp->link, bp, fp->bundle, LINK_QUEUES(fp->link) - 1,
223 if (code == CODE_CONFIGREJ)
224 lcp_SendIdentification(&fp->link->lcp);
230 struct fsm *fp = (struct fsm *)v;
232 timer_Stop(&fp->OpenTimer);
233 if (fp->state <= ST_STOPPED) {
234 if (fp->state != ST_STARTING) {
236 * In practice, we're only here in ST_STOPPED (when delaying the
237 * first config request) or ST_CLOSED (when openmode == 0).
239 * The ST_STOPPED bit is breaking the RFC already :-(
241 * According to the RFC (1661) state transition table, a TLS isn't
242 * required for an Open event when state == Closed, but the RFC
243 * must be wrong as TLS hasn't yet been called (since the last TLF)
244 * ie, Initial gets an `Up' event, Closing gets a RTA etc.
246 (*fp->fn->LayerStart)(fp);
247 (*fp->parent->LayerStart)(fp->parent->object, fp);
249 FsmInitRestartCounter(fp, FSM_REQ_TIMER);
250 FsmSendConfigReq(fp);
251 NewState(fp, ST_REQSENT);
256 fsm_Open(struct fsm *fp)
260 NewState(fp, ST_STARTING);
261 (*fp->fn->LayerStart)(fp);
262 (*fp->parent->LayerStart)(fp->parent->object, fp);
265 if (fp->open_mode == OPEN_PASSIVE) {
266 NewState(fp, ST_STOPPED); /* XXX: This is a hack ! */
267 } else if (fp->open_mode > 0) {
268 if (fp->open_mode > 1)
269 log_Printf(LogPHASE, "%s: Entering STOPPED state for %d seconds\n",
270 fp->link->name, fp->open_mode);
271 NewState(fp, ST_STOPPED); /* XXX: This is a not-so-bad hack ! */
272 timer_Stop(&fp->OpenTimer);
273 fp->OpenTimer.load = fp->open_mode * SECTICKS;
274 fp->OpenTimer.func = FsmOpenNow;
275 fp->OpenTimer.arg = (void *)fp;
276 timer_Start(&fp->OpenTimer);
280 case ST_STOPPED: /* XXX: restart option */
284 case ST_OPENED: /* XXX: restart option */
286 case ST_CLOSING: /* XXX: restart option */
287 case ST_STOPPING: /* XXX: restart option */
288 NewState(fp, ST_STOPPING);
294 fsm_Up(struct fsm *fp)
298 log_Printf(fp->LogLevel, "FSM: Using \"%s\" as a transport\n",
300 NewState(fp, ST_CLOSED);
303 FsmInitRestartCounter(fp, FSM_REQ_TIMER);
304 FsmSendConfigReq(fp);
305 NewState(fp, ST_REQSENT);
308 log_Printf(fp->LogLevel, "%s: Oops, Up at %s\n",
309 fp->link->name, State2Nam(fp->state));
315 fsm_Down(struct fsm *fp)
319 NewState(fp, ST_INITIAL);
322 /* This TLF contradicts the RFC (1661), which ``misses it out'' ! */
323 (*fp->fn->LayerFinish)(fp);
324 NewState(fp, ST_INITIAL);
325 (*fp->parent->LayerFinish)(fp->parent->object, fp);
328 NewState(fp, ST_STARTING);
329 (*fp->fn->LayerStart)(fp);
330 (*fp->parent->LayerStart)(fp->parent->object, fp);
336 NewState(fp, ST_STARTING);
339 (*fp->fn->LayerDown)(fp);
340 NewState(fp, ST_STARTING);
341 (*fp->parent->LayerDown)(fp->parent->object, fp);
347 fsm_Close(struct fsm *fp)
351 (*fp->fn->LayerFinish)(fp);
352 NewState(fp, ST_INITIAL);
353 (*fp->parent->LayerFinish)(fp->parent->object, fp);
356 NewState(fp, ST_CLOSED);
359 NewState(fp, ST_CLOSING);
362 (*fp->fn->LayerDown)(fp);
363 if (fp->state == ST_OPENED) {
364 FsmInitRestartCounter(fp, FSM_TRM_TIMER);
365 FsmSendTerminateReq(fp);
366 NewState(fp, ST_CLOSING);
367 (*fp->parent->LayerDown)(fp->parent->object, fp);
373 FsmInitRestartCounter(fp, FSM_TRM_TIMER);
374 FsmSendTerminateReq(fp);
375 NewState(fp, ST_CLOSING);
384 FsmSendConfigReq(struct fsm *fp)
386 if (fp->more.reqs-- > 0 && fp->restart-- > 0) {
387 (*fp->fn->SendConfigReq)(fp);
388 timer_Start(&fp->FsmTimer); /* Start restart timer */
390 if (fp->more.reqs < 0)
391 log_Printf(LogPHASE, "%s: Too many %s REQs sent - abandoning "
392 "negotiation\n", fp->link->name, fp->name);
393 lcp_SendIdentification(&fp->link->lcp);
399 FsmSendTerminateReq(struct fsm *fp)
401 fsm_Output(fp, CODE_TERMREQ, fp->reqid, NULL, 0, MB_UNKNOWN);
402 (*fp->fn->SentTerminateReq)(fp);
403 timer_Start(&fp->FsmTimer); /* Start restart timer */
404 fp->restart--; /* Decrement restart counter */
413 struct fsm *fp = (struct fsm *)v;
419 FsmSendTerminateReq(fp);
423 FsmSendConfigReq(fp);
426 FsmSendConfigReq(fp);
427 NewState(fp, ST_REQSENT);
430 timer_Start(&fp->FsmTimer);
434 (*fp->fn->LayerFinish)(fp);
435 NewState(fp, ST_CLOSED);
436 (*fp->parent->LayerFinish)(fp->parent->object, fp);
439 (*fp->fn->LayerFinish)(fp);
440 NewState(fp, ST_STOPPED);
441 (*fp->parent->LayerFinish)(fp->parent->object, fp);
443 case ST_REQSENT: /* XXX: 3p */
446 (*fp->fn->LayerFinish)(fp);
447 NewState(fp, ST_STOPPED);
448 (*fp->parent->LayerFinish)(fp->parent->object, fp);
455 FsmInitRestartCounter(struct fsm *fp, int what)
457 timer_Stop(&fp->FsmTimer);
458 fp->FsmTimer.func = FsmTimeout;
459 fp->FsmTimer.arg = (void *)fp;
460 (*fp->fn->InitRestartCounter)(fp, what);
464 * Actions when receive packets
467 FsmRecvConfigReq(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
470 struct fsm_decode dec;
475 flen = ntohs(lhp->length) - sizeof *lhp;
477 log_Printf(LogWARN, "%s: FsmRecvConfigReq: plen (%d) < flen (%d)\n",
478 fp->link->name, plen, flen);
483 /* Check and process easy case */
486 if (fp->proto == PROTO_CCP && fp->link->lcp.fsm.state == ST_OPENED) {
488 * ccp_SetOpenMode() leaves us in initial if we're disabling
489 * & denying everything.
491 bp = m_prepend(bp, lhp, sizeof *lhp, 2);
492 bp = proto_Prepend(bp, fp->proto, 0, 0);
494 lcp_SendProtoRej(&fp->link->lcp, MBUF_CTOP(bp), bp->m_len);
500 log_Printf(fp->LogLevel, "%s: Oops, RCR in %s.\n",
501 fp->link->name, State2Nam(fp->state));
505 (*fp->fn->SendTerminateAck)(fp, lhp->id);
509 log_Printf(fp->LogLevel, "%s: Error: Got ConfigReq while state = %s\n",
510 fp->link->name, State2Nam(fp->state));
515 (*fp->fn->LayerDown)(fp);
520 dec.ackend = dec.ack;
521 dec.nakend = dec.nak;
522 dec.rejend = dec.rej;
523 (*fp->fn->DecodeConfig)(fp, MBUF_CTOP(bp), flen, MODE_REQ, &dec);
524 if (flen < sizeof(struct fsmconfig))
525 log_Printf(fp->LogLevel, " [EMPTY]\n");
527 if (dec.nakend == dec.nak && dec.rejend == dec.rej)
532 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)
615 (*fp->fn->SendTerminateAck)(fp, lhp->id);
621 FsmInitRestartCounter(fp, FSM_REQ_TIMER);
622 NewState(fp, ST_ACKRCVD);
625 FsmSendConfigReq(fp);
626 NewState(fp, ST_REQSENT);
629 FsmInitRestartCounter(fp, FSM_REQ_TIMER);
630 NewState(fp, ST_OPENED);
631 if ((*fp->fn->LayerUp)(fp))
632 (*fp->parent->LayerUp)(fp->parent->object, fp);
634 (*fp->fn->LayerDown)(fp);
635 FsmInitRestartCounter(fp, FSM_TRM_TIMER);
636 FsmSendTerminateReq(fp);
637 NewState(fp, ST_CLOSING);
638 lcp_SendIdentification(&fp->link->lcp);
642 (*fp->fn->LayerDown)(fp);
643 FsmSendConfigReq(fp);
644 NewState(fp, ST_REQSENT);
645 (*fp->parent->LayerDown)(fp->parent->object, fp);
652 FsmRecvConfigNak(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
655 struct fsm_decode dec;
659 flen = ntohs(lhp->length) - sizeof *lhp;
666 * Check and process easy case
671 log_Printf(fp->LogLevel, "%s: Oops, RCN in %s.\n",
672 fp->link->name, State2Nam(fp->state));
677 (*fp->fn->SendTerminateAck)(fp, lhp->id);
687 dec.ackend = dec.ack;
688 dec.nakend = dec.nak;
689 dec.rejend = dec.rej;
690 (*fp->fn->DecodeConfig)(fp, MBUF_CTOP(bp), flen, MODE_NAK, &dec);
691 if (flen < sizeof(struct fsmconfig))
692 log_Printf(fp->LogLevel, " [EMPTY]\n");
697 FsmInitRestartCounter(fp, FSM_REQ_TIMER);
698 FsmSendConfigReq(fp);
701 (*fp->fn->LayerDown)(fp);
702 FsmSendConfigReq(fp);
703 NewState(fp, ST_REQSENT);
704 (*fp->parent->LayerDown)(fp->parent->object, fp);
707 FsmSendConfigReq(fp);
708 NewState(fp, ST_REQSENT);
716 FsmRecvTermReq(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
722 log_Printf(fp->LogLevel, "%s: Oops, RTR in %s\n",
723 fp->link->name, State2Nam(fp->state));
730 (*fp->fn->SendTerminateAck)(fp, lhp->id);
734 (*fp->fn->SendTerminateAck)(fp, lhp->id);
735 NewState(fp, ST_REQSENT);
738 (*fp->fn->LayerDown)(fp);
739 (*fp->fn->SendTerminateAck)(fp, lhp->id);
740 FsmInitRestartCounter(fp, FSM_TRM_TIMER);
741 timer_Start(&fp->FsmTimer); /* Start restart timer */
743 NewState(fp, ST_STOPPING);
744 (*fp->parent->LayerDown)(fp->parent->object, fp);
745 /* A delayed ST_STOPPED is now scheduled */
752 FsmRecvTermAck(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
757 (*fp->fn->LayerFinish)(fp);
758 NewState(fp, ST_CLOSED);
759 (*fp->parent->LayerFinish)(fp->parent->object, fp);
762 (*fp->fn->LayerFinish)(fp);
763 NewState(fp, ST_STOPPED);
764 (*fp->parent->LayerFinish)(fp->parent->object, fp);
767 NewState(fp, ST_REQSENT);
770 (*fp->fn->LayerDown)(fp);
771 FsmSendConfigReq(fp);
772 NewState(fp, ST_REQSENT);
773 (*fp->parent->LayerDown)(fp->parent->object, fp);
780 FsmRecvConfigRej(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
783 struct fsm_decode dec;
787 flen = ntohs(lhp->length) - sizeof *lhp;
793 lcp_SendIdentification(&fp->link->lcp);
796 * Check and process easy case
801 log_Printf(fp->LogLevel, "%s: Oops, RCJ in %s.\n",
802 fp->link->name, State2Nam(fp->state));
807 (*fp->fn->SendTerminateAck)(fp, lhp->id);
817 dec.ackend = dec.ack;
818 dec.nakend = dec.nak;
819 dec.rejend = dec.rej;
820 (*fp->fn->DecodeConfig)(fp, MBUF_CTOP(bp), flen, MODE_REJ, &dec);
821 if (flen < sizeof(struct fsmconfig))
822 log_Printf(fp->LogLevel, " [EMPTY]\n");
827 FsmInitRestartCounter(fp, FSM_REQ_TIMER);
828 FsmSendConfigReq(fp);
831 (*fp->fn->LayerDown)(fp);
832 FsmSendConfigReq(fp);
833 NewState(fp, ST_REQSENT);
834 (*fp->parent->LayerDown)(fp->parent->object, fp);
837 FsmSendConfigReq(fp);
838 NewState(fp, ST_REQSENT);
845 FsmRecvCodeRej(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
851 FsmRecvProtoRej(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
853 struct physical *p = link2physical(fp->link);
856 if (m_length(bp) < 2) {
860 bp = mbuf_Read(bp, &proto, 2);
861 proto = ntohs(proto);
862 log_Printf(fp->LogLevel, "%s: -- Protocol 0x%04x (%s) was rejected!\n",
863 fp->link->name, proto, hdlc_Protocol2Nam(proto));
868 lqr_Stop(p, LQM_LQR);
870 log_Printf(LogERROR, "%s: FsmRecvProtoRej: Not a physical link !\n",
874 if (fp->proto == PROTO_LCP) {
875 fp = &fp->link->ccp.fsm;
876 /* Despite the RFC (1661), don't do an out-of-place TLF */
877 /* (*fp->fn->LayerFinish)(fp); */
881 NewState(fp, ST_CLOSED);
884 NewState(fp, ST_STOPPED);
888 /* (*fp->parent->LayerFinish)(fp->parent->object, fp); */
892 if (fp->proto == PROTO_LCP) {
893 log_Printf(LogPHASE, "%s: IPCP protocol reject closes IPCP !\n",
895 fsm_Close(&fp->bundle->ncp.ipcp.fsm);
900 if (fp->proto == PROTO_LCP) {
901 log_Printf(LogPHASE, "%s: IPV6CP protocol reject closes IPV6CP !\n",
903 fsm_Close(&fp->bundle->ncp.ipv6cp.fsm);
908 if (fp->proto == PROTO_LCP) {
909 struct lcp *lcp = fsm2lcp(fp);
911 if (lcp->want_mrru && lcp->his_mrru) {
912 log_Printf(LogPHASE, "%s: MP protocol reject is fatal !\n",
923 FsmRecvEchoReq(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
925 struct lcp *lcp = fsm2lcp(fp);
930 m_settype(bp, MB_ECHOIN);
932 if (lcp && ntohs(lhp->length) - sizeof *lhp >= 4) {
934 ua_ntohl(cp, &magic);
935 if (magic != lcp->his_magic) {
936 log_Printf(fp->LogLevel, "%s: RecvEchoReq: magic 0x%08lx is wrong,"
937 " expecting 0x%08lx\n", fp->link->name, (u_long)magic,
938 (u_long)lcp->his_magic);
939 /* XXX: We should send terminate request */
941 if (fp->state == ST_OPENED) {
942 ua_htonl(&lcp->want_magic, cp); /* local magic */
943 fsm_Output(fp, CODE_ECHOREP, lhp->id, cp,
944 ntohs(lhp->length) - sizeof *lhp, MB_ECHOOUT);
951 FsmRecvEchoRep(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
954 bp = lqr_RecvEcho(fp, bp);
960 FsmRecvDiscReq(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
966 FsmRecvIdent(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
972 len = ntohs(lhp->length) - sizeof *lhp;
974 bp = m_pullup(m_append(bp, "", 1));
976 ua_ntohl(cp, &magic);
977 if (magic != fp->link->lcp.his_magic)
978 log_Printf(fp->LogLevel, "%s: RecvIdent: magic 0x%08lx is wrong,"
979 " expecting 0x%08lx\n", fp->link->name, (u_long)magic,
980 (u_long)fp->link->lcp.his_magic);
982 lcp_RecvIdentification(&fp->link->lcp, cp + 4);
988 FsmRecvTimeRemain(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
994 FsmRecvResetReq(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
996 if ((*fp->fn->RecvResetReq)(fp)) {
998 * All sendable compressed packets are queued in the first (lowest
999 * priority) modem output queue.... dump 'em to the priority queue
1000 * so that they arrive at the peer before our ResetAck.
1002 link_SequenceQueue(fp->link);
1003 fsm_Output(fp, CODE_RESETACK, lhp->id, NULL, 0, MB_CCPOUT);
1009 FsmRecvResetAck(struct fsm *fp, struct fsmheader *lhp, struct mbuf *bp)
1011 (*fp->fn->RecvResetAck)(fp, lhp->id);
1016 fsm_Input(struct fsm *fp, struct mbuf *bp)
1019 struct fsmheader lh;
1020 const struct fsmcodedesc *codep;
1023 if (len < sizeof(struct fsmheader)) {
1027 bp = mbuf_Read(bp, &lh, sizeof lh);
1029 if (ntohs(lh.length) > len) {
1030 log_Printf(LogWARN, "%s: Oops: Got %d bytes but %d byte payload "
1031 "- dropped\n", fp->link->name, len, (int)ntohs(lh.length));
1036 if (lh.code < fp->min_code || lh.code > fp->max_code ||
1037 lh.code > sizeof FsmCodes / sizeof *FsmCodes) {
1039 * Use a private id. This is really a response-type packet, but we
1040 * MUST send a unique id for each REQ....
1044 bp = m_prepend(bp, &lh, sizeof lh, 0);
1046 fsm_Output(fp, CODE_CODEREJ, id++, MBUF_CTOP(bp), bp->m_len, MB_UNKNOWN);
1051 codep = FsmCodes + lh.code - 1;
1052 if (lh.id != fp->reqid && codep->check_reqid &&
1053 Enabled(fp->bundle, OPT_IDCHECK)) {
1054 log_Printf(fp->LogLevel, "%s: Recv%s(%d), dropped (expected %d)\n",
1055 fp->link->name, codep->name, lh.id, fp->reqid);
1059 log_Printf(fp->LogLevel, "%s: Recv%s(%d) state = %s\n",
1060 fp->link->name, codep->name, lh.id, State2Nam(fp->state));
1062 if (codep->inc_reqid && (lh.id == fp->reqid ||
1063 (!Enabled(fp->bundle, OPT_IDCHECK) && codep->check_reqid)))
1064 fp->reqid++; /* That's the end of that ``exchange''.... */
1066 (*codep->recv)(fp, &lh, bp);
1070 fsm_NullRecvResetReq(struct fsm *fp)
1072 log_Printf(fp->LogLevel, "%s: Oops - received unexpected reset req\n",
1078 fsm_NullRecvResetAck(struct fsm *fp, u_char id)
1080 log_Printf(fp->LogLevel, "%s: Oops - received unexpected reset ack\n",
1085 fsm_Reopen(struct fsm *fp)
1087 if (fp->state == ST_OPENED) {
1088 (*fp->fn->LayerDown)(fp);
1089 FsmInitRestartCounter(fp, FSM_REQ_TIMER);
1090 FsmSendConfigReq(fp);
1091 NewState(fp, ST_REQSENT);
1092 (*fp->parent->LayerDown)(fp->parent->object, fp);
1097 fsm2initial(struct fsm *fp)
1099 timer_Stop(&fp->FsmTimer);
1100 timer_Stop(&fp->OpenTimer);
1101 timer_Stop(&fp->StoppedTimer);
1102 if (fp->state == ST_STOPPED)
1104 if (fp->state > ST_INITIAL)
1106 if (fp->state > ST_INITIAL)