fsm.c
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- /*****************************************************************************
- * fsm.c - Network Control Protocol Finite State Machine program file.
- *
- * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
- * portions Copyright (c) 1997 by Global Election Systems Inc.
- *
- * The authors hereby grant permission to use, copy, modify, distribute,
- * and license this software and its documentation for any purpose, provided
- * that existing copyright notices are retained in all copies and that this
- * notice and the following disclaimer are included verbatim in any
- * distributions. No written agreement, license, or royalty fee is required
- * for any of the authorized uses.
- *
- * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- ******************************************************************************
- * REVISION HISTORY
- *
- * 03-01-01 Marc Boucher <marc@mbsi.ca>
- * Ported to lwIP.
- * 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
- * Original based on BSD fsm.c.
- *****************************************************************************/
- /*
- * fsm.c - {Link, IP} Control Protocol Finite State Machine.
- *
- * Copyright (c) 1989 Carnegie Mellon University.
- * All rights reserved.
- *
- * 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 Carnegie Mellon University. The name of the
- * University 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.
- */
- /*
- * TODO:
- * Randomize fsm id on link/init.
- * Deal with variable outgoing MTU.
- */
- #include "ppp.h"
- #if PPP_SUPPORT > 0
- #include "fsm.h"
- #include "pppdebug.h"
- #include "timer.h"
- #include "uart.h"
- /*************************/
- /*** LOCAL DEFINITIONS ***/
- /*************************/
- /************************/
- /*** LOCAL DATA TYPES ***/
- /************************/
- /***********************************/
- /*** LOCAL FUNCTION DECLARATIONS ***/
- /***********************************/
- static void fsm_timeout (void *);
- static void fsm_rconfreq (fsm *, u_char, u_char *, int);
- static void fsm_rconfack (fsm *, int, u_char *, int);
- static void fsm_rconfnakrej (fsm *, int, int, u_char *, int);
- static void fsm_rtermreq (fsm *, int, u_char *, int);
- static void fsm_rtermack (fsm *);
- static void fsm_rcoderej (fsm *, u_char *, int);
- static void fsm_sconfreq (fsm *, int);
- #define PROTO_NAME(f) ((f)->callbacks->proto_name)
- /******************************/
- /*** PUBLIC DATA STRUCTURES ***/
- /******************************/
- /*****************************/
- /*** LOCAL DATA STRUCTURES ***/
- /*****************************/
- int peer_mru[NUM_PPP];
- /***********************************/
- /*** PUBLIC FUNCTION DEFINITIONS ***/
- /***********************************/
- /*
- * fsm_init - Initialize fsm.
- *
- * Initialize fsm state.
- */
- void fsm_init(fsm *f)
- {
- f->state = INITIAL;
- f->flags = 0;
- f->id = 0; /* XXX Start with random id? */
- f->timeouttime = FSM_DEFTIMEOUT;
- f->maxconfreqtransmits = FSM_DEFMAXCONFREQS;
- f->maxtermtransmits = FSM_DEFMAXTERMREQS;
- f->maxnakloops = FSM_DEFMAXNAKLOOPS;
- f->term_reason_len = 0;
- }
- /*
- * fsm_lowerup - The lower layer is up.
- */
- void fsm_lowerup(fsm *f)
- {
- int oldState = f->state;
- switch( f->state ){
- case INITIAL:
- f->state = CLOSED;
- break;
-
- case STARTING:
- if( f->flags & OPT_SILENT )
- f->state = STOPPED;
- else {
- /* Send an initial configure-request */
- fsm_sconfreq(f, 0);
- f->state = REQSENT;
- }
- break;
-
- default:
- FSMDEBUG((LOG_INFO, "%s: Up event in state %d!n",
- PROTO_NAME(f), f->state));
- }
-
- FSMDEBUG((LOG_INFO, "%s: lowerup state %d -> %dn",
- PROTO_NAME(f), oldState, f->state));
- }
- /*
- * fsm_lowerdown - The lower layer is down.
- *
- * Cancel all timeouts and inform upper layers.
- */
- void fsm_lowerdown(fsm *f)
- {
- int oldState = f->state;
-
- switch( f->state ){
- case CLOSED:
- f->state = INITIAL;
- break;
-
- case STOPPED:
- f->state = STARTING;
- if( f->callbacks->starting )
- (*f->callbacks->starting)(f);
- break;
-
- case CLOSING:
- f->state = INITIAL;
- UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
- break;
-
- case STOPPING:
- case REQSENT:
- case ACKRCVD:
- case ACKSENT:
- f->state = STARTING;
- UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
- break;
-
- case OPENED:
- if( f->callbacks->down )
- (*f->callbacks->down)(f);
- f->state = STARTING;
- break;
-
- default:
- FSMDEBUG((LOG_INFO, "%s: Down event in state %d!n",
- PROTO_NAME(f), f->state));
- }
-
- FSMDEBUG((LOG_INFO, "%s: lowerdown state %d -> %dn",
- PROTO_NAME(f), oldState, f->state));
- }
- /*
- * fsm_open - Link is allowed to come up.
- */
- void fsm_open(fsm *f)
- {
- int oldState = f->state;
-
- switch( f->state ){
- case INITIAL:
- f->state = STARTING;
- if( f->callbacks->starting )
- (*f->callbacks->starting)(f);
- break;
-
- case CLOSED:
- if( f->flags & OPT_SILENT )
- f->state = STOPPED;
- else {
- /* Send an initial configure-request */
- fsm_sconfreq(f, 0);
- f->state = REQSENT;
- }
- break;
-
- case CLOSING:
- f->state = STOPPING;
- /* fall through */
- case STOPPED:
- case OPENED:
- if( f->flags & OPT_RESTART ){
- fsm_lowerdown(f);
- fsm_lowerup(f);
- }
- break;
- }
-
- FSMDEBUG((LOG_INFO, "%s: open state %d -> %dn",
- PROTO_NAME(f), oldState, f->state));
- }
- /*
- * fsm_close - Start closing connection.
- *
- * Cancel timeouts and either initiate close or possibly go directly to
- * the CLOSED state.
- */
- void fsm_close(fsm *f, char *reason)
- {
- int oldState = f->state;
-
- f->term_reason = reason;
- f->term_reason_len = (reason == NULL? 0: strlen(reason));
- switch( f->state ){
- case STARTING:
- f->state = INITIAL;
- break;
- case STOPPED:
- f->state = CLOSED;
- break;
- case STOPPING:
- f->state = CLOSING;
- break;
-
- case REQSENT:
- case ACKRCVD:
- case ACKSENT:
- case OPENED:
- if( f->state != OPENED )
- UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
- else if( f->callbacks->down )
- (*f->callbacks->down)(f); /* Inform upper layers we're down */
-
- /* Init restart counter, send Terminate-Request */
- f->retransmits = f->maxtermtransmits;
- fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
- (u_char *) f->term_reason, f->term_reason_len);
- TIMEOUT(fsm_timeout, f, f->timeouttime);
- --f->retransmits;
-
- f->state = CLOSING;
- break;
- }
-
- FSMDEBUG((LOG_INFO, "%s: close reason=%s state %d -> %dn",
- PROTO_NAME(f), reason, oldState, f->state));
- }
- /*
- * fsm_sdata - Send some data.
- *
- * Used for all packets sent to our peer by this module.
- */
- void fsm_sdata(
- fsm *f,
- u_char code,
- u_char id,
- u_char *data,
- int datalen
- )
- {
- u_char *outp;
- int outlen;
-
- /* Adjust length to be smaller than MTU */
- outp = outpacket_buf[f->unit];
- if (datalen > peer_mru[f->unit] - (int)HEADERLEN)
- datalen = peer_mru[f->unit] - HEADERLEN;
- if (datalen && data != outp + PPP_HDRLEN + HEADERLEN)
- BCOPY(data, outp + PPP_HDRLEN + HEADERLEN, datalen);
- outlen = datalen + HEADERLEN;
- MAKEHEADER(outp, f->protocol);
- PUTCHAR(code, outp);
- PUTCHAR(id, outp);
- PUTSHORT(outlen, outp);
- pppWrite(f->unit, outpacket_buf[f->unit], outlen + PPP_HDRLEN);
- FSMDEBUG((LOG_INFO, "fsm_sdata(%s): Sent code %d,%d,%d.n",
- PROTO_NAME(f), code, id, outlen));
- }
- /*
- * fsm_input - Input packet.
- */
- void fsm_input(fsm *f, u_char *inpacket, int l)
- {
- u_char *inp = inpacket;
- u_char code, id;
- int len;
-
- /*
- * Parse header (code, id and length).
- * If packet too short, drop it.
- */
- if (l < HEADERLEN) {
- FSMDEBUG((LOG_WARNING, "fsm_input(%x): Rcvd short header.n",
- f->protocol));
- return;
- }
- GETCHAR(code, inp);
- GETCHAR(id, inp);
- GETSHORT(len, inp);
- if (len < HEADERLEN) {
- FSMDEBUG((LOG_INFO, "fsm_input(%x): Rcvd illegal length.n",
- f->protocol));
- return;
- }
- if (len > l) {
- FSMDEBUG((LOG_INFO, "fsm_input(%x): Rcvd short packet.n",
- f->protocol));
- return;
- }
- len -= HEADERLEN; /* subtract header length */
-
- if( f->state == INITIAL || f->state == STARTING ){
- FSMDEBUG((LOG_INFO, "fsm_input(%x): Rcvd packet in state %d.n",
- f->protocol, f->state));
- return;
- }
- FSMDEBUG((LOG_INFO, "fsm_input(%s):%d,%d,%dn", PROTO_NAME(f), code, id, l));
- /*
- * Action depends on code.
- */
- switch (code) {
- case CONFREQ:
- fsm_rconfreq(f, id, inp, len);
- break;
-
- case CONFACK:
- fsm_rconfack(f, id, inp, len);
- break;
-
- case CONFNAK:
- case CONFREJ:
- fsm_rconfnakrej(f, code, id, inp, len);
- break;
-
- case TERMREQ:
- fsm_rtermreq(f, id, inp, len);
- break;
-
- case TERMACK:
- fsm_rtermack(f);
- break;
-
- case CODEREJ:
- fsm_rcoderej(f, inp, len);
- break;
-
- default:
- if( !f->callbacks->extcode
- || !(*f->callbacks->extcode)(f, code, id, inp, len) )
- fsm_sdata(f, CODEREJ, ++f->id, inpacket, len + HEADERLEN);
- break;
- }
- }
- /*
- * fsm_protreject - Peer doesn't speak this protocol.
- *
- * Treat this as a catastrophic error (RXJ-).
- */
- void fsm_protreject(fsm *f)
- {
- switch( f->state ){
- case CLOSING:
- UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
- /* fall through */
- case CLOSED:
- f->state = CLOSED;
- if( f->callbacks->finished )
- (*f->callbacks->finished)(f);
- break;
-
- case STOPPING:
- case REQSENT:
- case ACKRCVD:
- case ACKSENT:
- UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
- /* fall through */
- case STOPPED:
- f->state = STOPPED;
- if( f->callbacks->finished )
- (*f->callbacks->finished)(f);
- break;
-
- case OPENED:
- if( f->callbacks->down )
- (*f->callbacks->down)(f);
-
- /* Init restart counter, send Terminate-Request */
- f->retransmits = f->maxtermtransmits;
- fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
- (u_char *) f->term_reason, f->term_reason_len);
- TIMEOUT(fsm_timeout, f, f->timeouttime);
- --f->retransmits;
-
- f->state = STOPPING;
- break;
-
- default:
- FSMDEBUG((LOG_INFO, "%s: Protocol-reject event in state %d!n",
- PROTO_NAME(f), f->state));
- }
- }
- /**********************************/
- /*** LOCAL FUNCTION DEFINITIONS ***/
- /**********************************/
- /*
- * fsm_timeout - Timeout expired.
- */
- static void fsm_timeout(void *arg)
- {
- fsm *f = (fsm *) arg;
- DEBUG_FUNCTION(" fsm_timeout()")
- switch (f->state) {
- case CLOSING:
- case STOPPING:
- if( f->retransmits <= 0 ){
- FSMDEBUG((LOG_WARNING, "%s: timeout sending Terminate-Request state=%dn",
- PROTO_NAME(f), f->state));
- /*
- * We've waited for an ack long enough. Peer probably heard us.
- */
- f->state = (f->state == CLOSING)? CLOSED: STOPPED;
- if( f->callbacks->finished )
- (*f->callbacks->finished)(f);
- /*
- *added by zhouzhigang 2006.01.22 to delete lcp timer
- */
- UNTIMEOUT(fsm_timeout, f);
- } else {
- FSMDEBUG((LOG_WARNING, "%s: timeout resending Terminate-Requests state=%dn",
- PROTO_NAME(f), f->state));
- /* Send Terminate-Request */
- fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
- (u_char *) f->term_reason, f->term_reason_len);
- TIMEOUT(fsm_timeout, f, f->timeouttime);
- --f->retransmits;
- }
- break;
- case REQSENT:
- case ACKRCVD:
- case ACKSENT:
- if (f->retransmits <= 0) {
- FSMDEBUG((LOG_WARNING, "%s: timeout sending Config-Requests state=%dn",
- PROTO_NAME(f), f->state));
- f->state = STOPPED;
- if( (f->flags & OPT_PASSIVE) == 0 && f->callbacks->finished )
- (*f->callbacks->finished)(f);
- /*
- *added by zhouzhigang 2006.01.22 to delete lcp timer
- */
- UNTIMEOUT(fsm_timeout, f);
-
- } else {
- FSMDEBUG((LOG_WARNING, "%s: timeout resending Config-Request state=%dn",
- PROTO_NAME(f), f->state));
- /* Retransmit the configure-request */
- if (f->callbacks->retransmit)
- (*f->callbacks->retransmit)(f);
- fsm_sconfreq(f, 1); /* Re-send Configure-Request */
- if( f->state == ACKRCVD )
- f->state = REQSENT;
- }
- break;
- default:
- FSMDEBUG((LOG_INFO, "%s: Timeout event in state %d!n",
- PROTO_NAME(f), f->state));
- /*
- *added by zhouzhigang 2006.01.22 to delete lcp timer
- */
- UNTIMEOUT(fsm_timeout, f);
- }
- }
- /*
- * fsm_rconfreq - Receive Configure-Request.
- */
- static void fsm_rconfreq(fsm *f, u_char id, u_char *inp, int len)
- {
- int code, reject_if_disagree;
-
- FSMDEBUG((LOG_INFO, "fsm_rconfreq(%s): Rcvd id %d state=%dn",
- PROTO_NAME(f), id, f->state));
- switch( f->state ){
- case CLOSED:
- /* Go away, we're closed */
- fsm_sdata(f, TERMACK, id, NULL, 0);
- return;
- case CLOSING:
- case STOPPING:
- return;
-
- case OPENED:
- /* Go down and restart negotiation */
- if( f->callbacks->down )
- (*f->callbacks->down)(f); /* Inform upper layers */
- fsm_sconfreq(f, 0); /* Send initial Configure-Request */
- break;
-
- case STOPPED:
- /* Negotiation started by our peer */
- fsm_sconfreq(f, 0); /* Send initial Configure-Request */
- f->state = REQSENT;
- break;
- }
-
- /*
- * Pass the requested configuration options
- * to protocol-specific code for checking.
- */
- if (f->callbacks->reqci){ /* Check CI */
- reject_if_disagree = (f->nakloops >= f->maxnakloops);
- code = (*f->callbacks->reqci)(f, inp, &len, reject_if_disagree);
- }
- else if (len)
- code = CONFREJ; /* Reject all CI */
- else
- code = CONFACK;
-
- /* send the Ack, Nak or Rej to the peer */
- fsm_sdata(f, (u_char)code, id, inp, len);
-
- if (code == CONFACK) {
- if (f->state == ACKRCVD) {
- UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
- f->state = OPENED;
- if (f->callbacks->up)
- (*f->callbacks->up)(f); /* Inform upper layers */
- }
- else
- f->state = ACKSENT;
- f->nakloops = 0;
- }
- else {
- /* we sent CONFACK or CONFREJ */
- if (f->state != ACKRCVD)
- f->state = REQSENT;
- if( code == CONFNAK )
- ++f->nakloops;
- }
- }
- /*
- * fsm_rconfack - Receive Configure-Ack.
- */
- static void fsm_rconfack(fsm *f, int id, u_char *inp, int len)
- {
- FSMDEBUG((LOG_INFO, "fsm_rconfack(%s): Rcvd id %d state=%dn",
- PROTO_NAME(f), id, f->state));
-
- if (id != f->reqid || f->seen_ack) /* Expected id? */
- return; /* Nope, toss... */
- if( !(f->callbacks->ackci? (*f->callbacks->ackci)(f, inp, len):
- (len == 0)) ){
- /* Ack is bad - ignore it */
- FSMDEBUG((LOG_INFO, "%s: received bad Ack (length %d)n",
- PROTO_NAME(f), len));
- return;
- }
- f->seen_ack = 1;
-
- switch (f->state) {
- case CLOSED:
- case STOPPED:
- fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
- break;
-
- case REQSENT:
- f->state = ACKRCVD;
- f->retransmits = f->maxconfreqtransmits;
- break;
-
- case ACKRCVD:
- /* Huh? an extra valid Ack? oh well... */
- UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
- fsm_sconfreq(f, 0);
- f->state = REQSENT;
- break;
-
- case ACKSENT:
- UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
- f->state = OPENED;
- f->retransmits = f->maxconfreqtransmits;
- if (f->callbacks->up)
- (*f->callbacks->up)(f); /* Inform upper layers */
- break;
-
- case OPENED:
- /* Go down and restart negotiation */
- if (f->callbacks->down)
- (*f->callbacks->down)(f); /* Inform upper layers */
- fsm_sconfreq(f, 0); /* Send initial Configure-Request */
- f->state = REQSENT;
- break;
- }
- }
- /*
- * fsm_rconfnakrej - Receive Configure-Nak or Configure-Reject.
- */
- static void fsm_rconfnakrej(fsm *f, int code, int id, u_char *inp, int len)
- {
- int (*proc) (fsm *, u_char *, int);
- int ret;
-
- FSMDEBUG((LOG_INFO, "fsm_rconfnakrej(%s): Rcvd id %d state=%dn",
- PROTO_NAME(f), id, f->state));
-
- if (id != f->reqid || f->seen_ack) /* Expected id? */
- return; /* Nope, toss... */
- proc = (code == CONFNAK)? f->callbacks->nakci: f->callbacks->rejci;
- if (!proc || !(ret = proc(f, inp, len))) {
- /* Nak/reject is bad - ignore it */
- FSMDEBUG((LOG_INFO, "%s: received bad %s (length %d)n",
- PROTO_NAME(f), (code==CONFNAK? "Nak": "reject"), len));
- return;
- }
- f->seen_ack = 1;
-
- switch (f->state) {
- case CLOSED:
- case STOPPED:
- fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
- break;
-
- case REQSENT:
- case ACKSENT:
- /* They didn't agree to what we wanted - try another request */
- UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
- if (ret < 0)
- f->state = STOPPED; /* kludge for stopping CCP */
- else
- fsm_sconfreq(f, 0); /* Send Configure-Request */
- break;
-
- case ACKRCVD:
- /* Got a Nak/reject when we had already had an Ack?? oh well... */
- UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
- fsm_sconfreq(f, 0);
- f->state = REQSENT;
- break;
-
- case OPENED:
- /* Go down and restart negotiation */
- if (f->callbacks->down)
- (*f->callbacks->down)(f); /* Inform upper layers */
- fsm_sconfreq(f, 0); /* Send initial Configure-Request */
- f->state = REQSENT;
- break;
- }
- }
- /*
- * fsm_rtermreq - Receive Terminate-Req.
- */
- static void fsm_rtermreq(fsm *f, int id, u_char *p, int len)
- {
- FSMDEBUG((LOG_INFO, "fsm_rtermreq(%s): Rcvd id %d state=%dn",
- PROTO_NAME(f), id, f->state));
-
- switch (f->state) {
- case ACKRCVD:
- case ACKSENT:
- f->state = REQSENT; /* Start over but keep trying */
- break;
-
- case OPENED:
- if (len > 0) {
- FSMDEBUG((LOG_INFO, "%s terminated by peer (%x)n", PROTO_NAME(f), p));
- } else {
- FSMDEBUG((LOG_INFO, "%s terminated by peern", PROTO_NAME(f)));
- }
- if (f->callbacks->down)
- (*f->callbacks->down)(f); /* Inform upper layers */
- f->retransmits = 0;
- f->state = STOPPING;
- TIMEOUT(fsm_timeout, f, f->timeouttime);
- break;
- }
-
- fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
- }
- /*
- * fsm_rtermack - Receive Terminate-Ack.
- */
- static void fsm_rtermack(fsm *f)
- {
- FSMDEBUG((LOG_INFO, "fsm_rtermack(%s): state=%dn",
- PROTO_NAME(f), f->state));
-
- switch (f->state) {
- case CLOSING:
- UNTIMEOUT(fsm_timeout, f);
- f->state = CLOSED;
- if( f->callbacks->finished )
- (*f->callbacks->finished)(f);
- break;
- case STOPPING:
- UNTIMEOUT(fsm_timeout, f);
- f->state = STOPPED;
- if( f->callbacks->finished )
- (*f->callbacks->finished)(f);
- break;
-
- case ACKRCVD:
- f->state = REQSENT;
- break;
-
- case OPENED:
- if (f->callbacks->down)
- (*f->callbacks->down)(f); /* Inform upper layers */
- fsm_sconfreq(f, 0);
- break;
- }
- }
- /*
- * fsm_rcoderej - Receive an Code-Reject.
- */
- static void fsm_rcoderej(fsm *f, u_char *inp, int len)
- {
- u_char code, id;
-
- FSMDEBUG((LOG_INFO, "fsm_rcoderej(%s): state=%dn",
- PROTO_NAME(f), f->state));
-
- if (len < HEADERLEN) {
- FSMDEBUG((LOG_INFO, "fsm_rcoderej: Rcvd short Code-Reject packet!n"));
- return;
- }
- GETCHAR(code, inp);
- GETCHAR(id, inp);
- FSMDEBUG((LOG_WARNING, "%s: Rcvd Code-Reject for code %d, id %dn",
- PROTO_NAME(f), code, id));
-
- if( f->state == ACKRCVD )
- f->state = REQSENT;
- }
- /*
- * fsm_sconfreq - Send a Configure-Request.
- */
- static void fsm_sconfreq(fsm *f, int retransmit)
- {
- u_char *outp;
- int cilen;
-
- if( f->state != REQSENT && f->state != ACKRCVD && f->state != ACKSENT ){
- /* Not currently negotiating - reset options */
- if( f->callbacks->resetci )
- (*f->callbacks->resetci)(f);/* void lcp_resetci(fsm *f) */
- f->nakloops = 0;
- }
-
- if( !retransmit ){
- /* New request - reset retransmission counter, use new ID */
- f->retransmits = f->maxconfreqtransmits;
- f->reqid = ++f->id;
- }
-
- f->seen_ack = 0;
-
- /*
- * Make up the request packet
- */
- outp = outpacket_buf[f->unit] + PPP_HDRLEN + HEADERLEN;
- if( f->callbacks->cilen && f->callbacks->addci ){
- cilen = (*f->callbacks->cilen)(f); /*lcp_cilen()*/
- if( cilen > peer_mru[f->unit] - (int)HEADERLEN )
- cilen = peer_mru[f->unit] - HEADERLEN;
- if (f->callbacks->addci)
- (*f->callbacks->addci)(f, outp, &cilen);
- } else
- cilen = 0;
-
- /* send the request to our peer */
- fsm_sdata(f, CONFREQ, f->reqid, outp, cilen);
-
- /* start the retransmit timer */
- --f->retransmits;
- TIMEOUT(fsm_timeout, f, f->timeouttime);
-
- FSMDEBUG((LOG_INFO, "%s: sending Configure-Request, id %dn",
- PROTO_NAME(f), f->reqid));
- }
- #endif /* PPP_SUPPORT */