X-Git-Url: http://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=pppd%2Flcp.c;h=7d0a40677776f1b841e568aaa85a2ce66c364e5e;hp=69342d8392286687a3f59cb98ea3f45f1d1bdde4;hb=88890fc13f9b346db647c882b376926686177112;hpb=0a453eda9892660c2b41922e3e1567bf2d9907a0 diff --git a/pppd/lcp.c b/pppd/lcp.c index 69342d8..7d0a406 100644 --- a/pppd/lcp.c +++ b/pppd/lcp.c @@ -18,7 +18,7 @@ */ #ifndef lint -static char rcsid[] = "$Id: lcp.c,v 1.18 1995/04/28 06:25:23 paulus Exp $"; +static char rcsid[] = "$Id: lcp.c,v 1.26 1996/05/28 00:41:13 paulus Exp $"; #endif /* @@ -38,15 +38,8 @@ static char rcsid[] = "$Id: lcp.c,v 1.18 1995/04/28 06:25:23 paulus Exp $"; #include "pppd.h" #include "fsm.h" #include "lcp.h" -#include "magic.h" #include "chap.h" -#include "upap.h" -#include "ipcp.h" - -#ifdef _linux_ /* Needs ppp ioctls */ -#include -#include -#endif +#include "magic.h" /* global vars */ fsm lcp_fsm[NUM_PPP]; /* LCP fsm structure (global)*/ @@ -62,11 +55,6 @@ static u_int32_t lcp_echo_timer_running = 0; /* TRUE if a timer is running */ static u_char nak_buffer[PPP_MRU]; /* where we construct a nak packet */ -#ifdef _linux_ -u_int32_t idle_timer_running = 0; -extern int idle_time_limit; -#endif - /* * Callbacks for fsm code. (CI = Configuration Information) */ @@ -113,7 +101,13 @@ static fsm_callbacks lcp_callbacks = { /* LCP callback routines */ "LCP" /* String name of protocol */ }; -int lcp_warnloops = DEFWARNLOOPS; /* Warn about a loopback this often */ +struct protent lcp_protent = { + PPP_LCP, lcp_init, lcp_input, lcp_protrej, + lcp_lowerup, lcp_lowerdown, lcp_open, lcp_close, + lcp_printpkt, NULL, 1, "LCP", NULL, NULL +}; + +int lcp_loopbackfail = DEFLOOPBACKFAIL; /* * Length of each type of configuration option (in octets) @@ -201,8 +195,9 @@ lcp_open(unit) * lcp_close - Take LCP down. */ void -lcp_close(unit) +lcp_close(unit, reason) int unit; + char *reason; { fsm *f = &lcp_fsm[unit]; @@ -210,75 +205,16 @@ lcp_close(unit) /* * This action is not strictly according to the FSM in RFC1548, * but it does mean that the program terminates if you do a - * lcp_close(0) in passive/silent mode when a connection hasn't + * lcp_close() in passive/silent mode when a connection hasn't * been established. */ f->state = CLOSED; lcp_finished(f); } else - fsm_close(&lcp_fsm[unit]); -} - -#ifdef _linux_ -static void IdleTimeCheck __P((caddr_t)); - -/* - * Timer expired for the LCP echo requests from this process. - */ - -static void -RestartIdleTimer (f) - fsm *f; -{ - u_long delta; - struct ppp_ddinfo ddinfo; - u_long latest; -/* - * Read the time since the last packet was received. - */ - if (ioctl (fd, PPPIOCGTIME, &ddinfo) < 0) { - syslog (LOG_ERR, "ioctl(PPPIOCGTIME): %m"); - die (1); - } -/* - * Choose the most recient IP activity. It may be a read or write frame - */ - latest = ddinfo.ip_sjiffies < ddinfo.ip_rjiffies ? ddinfo.ip_sjiffies - : ddinfo.ip_rjiffies; -/* - * Compute the time since the last packet was received. If the timer - * has expired then send the echo request and reset the timer to maximum. - */ - delta = (idle_time_limit * HZ) - latest; - if (((int) delta < HZ || (int) latest < 0L) && f->state == OPENED) { - syslog (LOG_NOTICE, "No IP frames exchanged within idle time limit"); - lcp_close(f->unit); /* Reset connection */ - phase = PHASE_TERMINATE; /* Mark it down */ - } else { - delta = (delta + HZ - 1) / HZ; - if (delta == 0) - delta = (u_long) idle_time_limit; - assert (idle_timer_running==0); - TIMEOUT (IdleTimeCheck, (caddr_t) f, delta); - idle_timer_running = 1; - } + fsm_close(&lcp_fsm[unit], reason); } -/* - * IdleTimeCheck - Timer expired on the IDLE detection for IP frames - */ - -static void -IdleTimeCheck (arg) - caddr_t arg; -{ - if (idle_timer_running != 0) { - idle_timer_running = 0; - RestartIdleTimer ((fsm *) arg); - } -} -#endif /* * lcp_lowerup - The lower layer is up. @@ -287,10 +223,17 @@ void lcp_lowerup(unit) int unit; { - sifdown(unit); + lcp_options *wo = &lcp_wantoptions[unit]; + + /* + * Don't use A/C or protocol compression on transmission, + * but accept A/C and protocol compressed packets + * if we are going to ask for A/C and protocol compression. + */ ppp_set_xaccm(unit, xmit_accm[unit]); ppp_send_config(unit, PPP_MRU, 0xffffffff, 0, 0); - ppp_recv_config(unit, PPP_MRU, 0x00000000, 0, 0); + ppp_recv_config(unit, PPP_MRU, 0x00000000, + wo->neg_pcompression, wo->neg_accompression); peer_mru[unit] = PPP_MRU; lcp_allowoptions[unit].asyncmap = xmit_accm[unit][0]; @@ -318,23 +261,9 @@ lcp_input(unit, p, len) u_char *p; int len; { - int oldstate; fsm *f = &lcp_fsm[unit]; - lcp_options *go = &lcp_gotoptions[f->unit]; - oldstate = f->state; fsm_input(f, p, len); - if (oldstate == REQSENT && f->state == ACKSENT) { - /* - * The peer will probably send us an ack soon and then - * immediately start sending packets with the negotiated - * options. So as to be ready when that happens, we set - * our receive side to accept packets as negotiated now. - */ - ppp_recv_config(f->unit, PPP_MRU, - go->neg_asyncmap? go->asyncmap: 0x00000000, - go->neg_pcompression, go->neg_accompression); - } } @@ -389,6 +318,8 @@ lcp_rprotrej(f, inp, len) u_char *inp; int len; { + int i; + struct protent *protp; u_short prot; LCPDEBUG((LOG_INFO, "lcp_rprotrej.")); @@ -415,7 +346,17 @@ lcp_rprotrej(f, inp, len) return; } - DEMUXPROTREJ(f->unit, prot); /* Inform protocol */ + /* + * Upcall the proper Protocol-Reject routine. + */ + for (i = 0; (protp = protocols[i]) != NULL; ++i) + if (protp->protocol == prot && protp->enabled_flag) { + (*protp->protrej)(f->unit); + return; + } + + syslog(LOG_WARNING, "Protocol-Reject for unsupported protocol 0x%x", + prot); } @@ -461,8 +402,8 @@ lcp_sprotrej(unit, p, len) * lcp_resetci - Reset our CI. */ static void - lcp_resetci(f) -fsm *f; +lcp_resetci(f) + fsm *f; { lcp_wantoptions[f->unit].magicnumber = magic(); lcp_wantoptions[f->unit].numloops = 0; @@ -480,17 +421,17 @@ lcp_cilen(f) { lcp_options *go = &lcp_gotoptions[f->unit]; -#define LENCIVOID(neg) (neg ? CILEN_VOID : 0) -#define LENCICHAP(neg) (neg ? CILEN_CHAP : 0) -#define LENCISHORT(neg) (neg ? CILEN_SHORT : 0) -#define LENCILONG(neg) (neg ? CILEN_LONG : 0) -#define LENCILQR(neg) (neg ? CILEN_LQR: 0) +#define LENCIVOID(neg) ((neg) ? CILEN_VOID : 0) +#define LENCICHAP(neg) ((neg) ? CILEN_CHAP : 0) +#define LENCISHORT(neg) ((neg) ? CILEN_SHORT : 0) +#define LENCILONG(neg) ((neg) ? CILEN_LONG : 0) +#define LENCILQR(neg) ((neg) ? CILEN_LQR: 0) /* * NB: we only ask for one of CHAP and UPAP, even if we will * accept either. */ - return (LENCISHORT(go->neg_mru) + - LENCILONG(go->neg_asyncmap) + + return (LENCISHORT(go->neg_mru && go->mru != DEFMRU) + + LENCILONG(go->neg_asyncmap && go->asyncmap != 0xFFFFFFFF) + LENCICHAP(go->neg_chap) + LENCISHORT(!go->neg_chap && go->neg_upap) + LENCILQR(go->neg_lqr) + @@ -544,8 +485,9 @@ lcp_addci(f, ucp, lenp) PUTLONG(val, ucp); \ } - ADDCISHORT(CI_MRU, go->neg_mru, go->mru); - ADDCILONG(CI_ASYNCMAP, go->neg_asyncmap, go->asyncmap); + ADDCISHORT(CI_MRU, go->neg_mru && go->mru != DEFMRU, go->mru); + ADDCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFF, + go->asyncmap); ADDCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype); ADDCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP); ADDCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period); @@ -653,8 +595,9 @@ lcp_ackci(f, p, len) goto bad; \ } - ACKCISHORT(CI_MRU, go->neg_mru, go->mru); - ACKCILONG(CI_ASYNCMAP, go->neg_asyncmap, go->asyncmap); + ACKCISHORT(CI_MRU, go->neg_mru && go->mru != DEFMRU, go->mru); + ACKCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFF, + go->asyncmap); ACKCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype); ACKCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP); ACKCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period); @@ -771,17 +714,21 @@ lcp_nakci(f, p, len) * If they send us a bigger MRU than what we asked, accept it, up to * the limit of the default MRU we'd get if we didn't negotiate. */ - NAKCISHORT(CI_MRU, neg_mru, - if (cishort <= wo->mru || cishort < DEFMRU) - try.mru = cishort; - ); + if (go->neg_mru && go->mru != DEFMRU) { + NAKCISHORT(CI_MRU, neg_mru, + if (cishort <= wo->mru || cishort < DEFMRU) + try.mru = cishort; + ); + } /* * Add any characters they want to our (receive-side) asyncmap. */ - NAKCILONG(CI_ASYNCMAP, neg_asyncmap, - try.asyncmap = go->asyncmap | cilong; - ); + if (go->neg_asyncmap && go->asyncmap != 0xFFFFFFFF) { + NAKCILONG(CI_ASYNCMAP, neg_asyncmap, + try.asyncmap = go->asyncmap | cilong; + ); + } /* * If they've nak'd our authentication-protocol, check whether @@ -862,7 +809,6 @@ lcp_nakci(f, p, len) */ NAKCILONG(CI_MAGICNUMBER, neg_magicnumber, try.magicnumber = magic(); - ++try.numloops; looped_back = 1; ); @@ -886,21 +832,28 @@ lcp_nakci(f, p, len) * `let me authenticate myself with you' which is a bit pointless. * For the quality protocol, the Nak means `ask me to send you quality * reports', but if we didn't ask for them, we don't want them. + * An option we don't recognize represents the peer asking to + * negotiate some option we don't support, so ignore it. */ while (len > CILEN_VOID) { GETCHAR(citype, p); GETCHAR(cilen, p); - if( (len -= cilen) < 0 ) + if ((len -= cilen) < 0) goto bad; next = p + cilen - 2; switch (citype) { case CI_MRU: - if (go->neg_mru || no.neg_mru || cilen != CILEN_SHORT) + if (go->neg_mru && go->mru != DEFMRU + || no.neg_mru || cilen != CILEN_SHORT) goto bad; + GETSHORT(cishort, p); + if (cishort < DEFMRU) + try.mru = cishort; break; case CI_ASYNCMAP: - if (go->neg_asyncmap || no.neg_asyncmap || cilen != CILEN_LONG) + if (go->neg_asyncmap && go->asyncmap != 0xFFFFFFFF + || no.neg_asyncmap || cilen != CILEN_LONG) goto bad; break; case CI_AUTHTYPE: @@ -926,8 +879,6 @@ lcp_nakci(f, p, len) if (go->neg_lqr || no.neg_lqr || cilen != CILEN_LQR) goto bad; break; - default: - goto bad; } p = next; } @@ -940,9 +891,14 @@ lcp_nakci(f, p, len) * OK, the Nak is good. Now we can update state. */ if (f->state != OPENED) { + if (looped_back) { + if (++try.numloops >= lcp_loopbackfail) { + syslog(LOG_NOTICE, "Serial line is looped back."); + lcp_close(f->unit, "Loopback detected"); + } + } else + try.numloops = 0; *go = try; - if (looped_back && try.numloops % lcp_warnloops == 0) - syslog(LOG_WARNING, "Serial line appears to be looped back."); } return 1; @@ -972,8 +928,6 @@ lcp_rejci(f, p, len) u_char cichar; u_short cishort; u_int32_t cilong; - u_char *start = p; - int plen = len; lcp_options try; /* options to request next time */ try = *go; @@ -1078,8 +1032,6 @@ lcp_rejci(f, p, len) bad: LCPDEBUG((LOG_WARNING, "lcp_rejci: received bad Reject!")); - LCPDEBUG((LOG_WARNING, "lcp_rejci: plen %d len %d off %d", - plen, len, p - start)); return 0; } @@ -1102,7 +1054,7 @@ lcp_reqci(f, inp, lenp, reject_if_disagree) lcp_options *ho = &lcp_hisoptions[f->unit]; lcp_options *ao = &lcp_allowoptions[f->unit]; u_char *cip, *next; /* Pointer to current and next CIs */ - u_char cilen, citype, cichar;/* Parsed len, type, char value */ + int cilen, citype, cichar; /* Parsed len, type, char value */ u_short cishort; /* Parsed short value */ u_int32_t cilong; /* Parse long value */ int rc = CONFACK; /* Final packet return code */ @@ -1133,6 +1085,7 @@ lcp_reqci(f, inp, lenp, reject_if_disagree) orc = CONFREJ; /* Reject bad CI */ cilen = l; /* Reject till end of packet */ l = 0; /* Don't loop again */ + citype = 0; goto endswitch; } GETCHAR(citype, p); /* Parse CI type */ @@ -1251,7 +1204,11 @@ lcp_reqci(f, inp, lenp, reject_if_disagree) break; } GETCHAR(cichar, p); /* get digest type*/ - if (cichar != ao->chap_mdtype) { + if (cichar != CHAP_DIGEST_MD5 +#ifdef CHAPMS + && cichar != CHAP_MICROSOFT +#endif + ) { orc = CONFNAK; PUTCHAR(CI_AUTHTYPE, nakp); PUTCHAR(CILEN_CHAP, nakp); @@ -1368,9 +1325,10 @@ endswitch: continue; /* Don't send this one */ if (orc == CONFNAK) { /* Nak this CI? */ - if (reject_if_disagree) /* Getting fed up with sending NAKs? */ + if (reject_if_disagree /* Getting fed up with sending NAKs? */ + && citype != CI_MAGICNUMBER) { orc = CONFREJ; /* Get tough if so */ - else { + } else { if (rc == CONFREJ) /* Rejecting prior CI? */ continue; /* Don't send this one */ rc = CONFNAK; @@ -1414,8 +1372,6 @@ endswitch: /* * lcp_up - LCP has come UP. - * - * Start UPAP, IPCP, etc. */ static void lcp_up(f) @@ -1452,10 +1408,6 @@ lcp_up(f) if (ho->neg_mru) peer_mru[f->unit] = ho->mru; - ChapLowerUp(f->unit); /* Enable CHAP */ - upap_lowerup(f->unit); /* Enable UPAP */ - ipcp_lowerup(f->unit); /* Enable IPCP */ - ccp_lowerup(f->unit); /* Enable CCP */ lcp_echo_lowerup(f->unit); /* Enable echo messages */ link_established(f->unit); @@ -1471,18 +1423,17 @@ static void lcp_down(f) fsm *f; { + lcp_options *go = &lcp_gotoptions[f->unit]; + lcp_echo_lowerdown(f->unit); - ccp_lowerdown(f->unit); - ipcp_lowerdown(f->unit); - ChapLowerDown(f->unit); - upap_lowerdown(f->unit); - sifdown(f->unit); + link_down(f->unit); + ppp_send_config(f->unit, PPP_MRU, 0xffffffff, 0, 0); - ppp_recv_config(f->unit, PPP_MRU, 0x00000000, 0, 0); + ppp_recv_config(f->unit, PPP_MRU, + (go->neg_asyncmap? go->asyncmap: 0x00000000), + go->neg_pcompression, go->neg_accompression); peer_mru[f->unit] = PPP_MRU; - - link_down(f->unit); } @@ -1582,7 +1533,7 @@ lcp_printpkt(p, plen, printer, arg) GETSHORT(cishort, p); switch (cishort) { case PPP_PAP: - printer(arg, "upap"); + printer(arg, "pap"); break; case PPP_CHAP: printer(arg, "chap"); @@ -1633,6 +1584,16 @@ lcp_printpkt(p, plen, printer, arg) printer(arg, ">"); } break; + case ECHOREQ: + case ECHOREP: + case DISCREQ: + if (len >= 4) { + GETLONG(cilong, p); + printer(arg, " magic=0x%x", cilong); + p += 4; + len -= 4; + } + break; } /* print the rest of the bytes in the packet */ @@ -1653,8 +1614,10 @@ void LcpLinkFailure (f) fsm *f; { if (f->state == OPENED) { - syslog (LOG_NOTICE, "Excessive lack of response to LCP echo frames."); - lcp_close(f->unit); /* Reset connection */ + syslog(LOG_INFO, "No response to %d echo-requests", lcp_echos_pending); + syslog(LOG_NOTICE, "Serial link appears to be disconnected."); + lcp_close(f->unit, "Peer not responding"); + phase = PHASE_TERMINATE; } } @@ -1666,43 +1629,13 @@ static void LcpEchoCheck (f) fsm *f; { - u_int32_t delta; -#ifdef __linux__ - struct ppp_ddinfo ddinfo; - u_int32_t latest; -/* - * Read the time since the last packet was received. - */ - if (ioctl (fd, PPPIOCGTIME, &ddinfo) < 0) { - syslog (LOG_ERR, "ioctl(PPPIOCGTIME): %m"); - die (1); - } -/* - * Choose the most recient frame received. It may be an IP or NON-IP frame. - */ - latest = ddinfo.nip_rjiffies < ddinfo.ip_rjiffies ? ddinfo.nip_rjiffies - : ddinfo.ip_rjiffies; -/* - * Compute the time since the last packet was received. If the timer - * has expired then send the echo request and reset the timer to maximum. - */ - delta = (lcp_echo_interval * HZ) - latest; - if (delta < HZ || latest < 0L) { - LcpSendEchoRequest (f); - delta = lcp_echo_interval * HZ; - } - delta /= HZ; - -#else /* Other implementations do not have ability to find delta */ LcpSendEchoRequest (f); - delta = lcp_echo_interval; -#endif -/* - * Start the timer for the next interval. - */ + /* + * Start the timer for the next interval. + */ assert (lcp_echo_timer_running==0); - TIMEOUT (LcpEchoTimeout, (caddr_t) f, delta); + TIMEOUT (LcpEchoTimeout, (caddr_t) f, lcp_echo_interval); lcp_echo_timer_running = 1; } @@ -1758,27 +1691,24 @@ LcpSendEchoRequest (f) u_int32_t lcp_magic; u_char pkt[4], *pktp; -/* - * Detect the failure of the peer at this point. - */ + /* + * Detect the failure of the peer at this point. + */ if (lcp_echo_fails != 0) { if (lcp_echos_pending++ >= lcp_echo_fails) { LcpLinkFailure(f); lcp_echos_pending = 0; } } -/* - * Make and send the echo request frame. - */ + + /* + * Make and send the echo request frame. + */ if (f->state == OPENED) { - lcp_magic = lcp_gotoptions[f->unit].neg_magicnumber - ? lcp_gotoptions[f->unit].magicnumber - : 0L; + lcp_magic = lcp_gotoptions[f->unit].magicnumber; pktp = pkt; PUTLONG(lcp_magic, pktp); - - fsm_sdata(f, ECHOREQ, - lcp_echo_number++ & 0xFF, pkt, pktp - pkt); + fsm_sdata(f, ECHOREQ, lcp_echo_number++ & 0xFF, pkt, pktp - pkt); } } @@ -1800,11 +1730,6 @@ lcp_echo_lowerup (unit) /* If a timeout interval is specified then start the timer */ if (lcp_echo_interval != 0) LcpEchoCheck (f); -#ifdef _linux_ - /* If a idle time limit is given then start it */ - if (idle_time_limit != 0) - RestartIdleTimer (f); -#endif } /* @@ -1821,11 +1746,4 @@ lcp_echo_lowerdown (unit) UNTIMEOUT (LcpEchoTimeout, (caddr_t) f); lcp_echo_timer_running = 0; } -#ifdef _linux_ - /* If a idle time limit is running then stop it */ - if (idle_timer_running != 0) { - UNTIMEOUT (IdleTimeCheck, (caddr_t) f); - idle_timer_running = 0; - } -#endif }