* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#ifndef lint
-static char rcsid[] = "$Id: lcp.c,v 1.39 1999/05/12 06:19:47 paulus Exp $";
-#endif
+#define RCSID "$Id: lcp.c,v 1.48 2000/03/27 06:02:59 paulus Exp $";
/*
* TODO:
#include "chap.h"
#include "magic.h"
+static const char rcsid[] = RCSID;
+
/*
* LCP-related command-line options.
*/
{ "-as", o_uint32, &lcp_wantoptions[0].asyncmap,
"Set asyncmap (for received packets)",
OPT_OR, &lcp_wantoptions[0].neg_asyncmap },
- { "nomagicnumber", o_bool, &lcp_wantoptions[0].neg_magicnumber,
+ { "nomagic", o_bool, &lcp_wantoptions[0].neg_magicnumber,
"Disable magic number negotiation (looped-back line detection)",
OPT_A2COPY, &lcp_allowoptions[0].neg_magicnumber },
{ "-mn", o_bool, &lcp_wantoptions[0].neg_magicnumber,
"Set limit on number of LCP configure-naks" },
{ "receive-all", o_bool, &lax_recv,
"Accept all received control characters", 1 },
+#ifdef HAVE_MULTILINK
+ { "mpshortseq", o_bool, &lcp_wantoptions[0].neg_ssnhf,
+ "Use short sequence numbers in multilink headers",
+ OPT_A2COPY, &lcp_allowoptions[0].neg_ssnhf },
+ { "nompshortseq", o_bool, &lcp_wantoptions[0].neg_ssnhf,
+ "Don't use short sequence numbers in multilink headers",
+ OPT_A2COPY, &lcp_allowoptions[0].neg_ssnhf },
+#endif /* HAVE_MULTILINK */
{NULL}
};
lcp_options lcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
u_int32_t xmit_accm[NUM_PPP][8]; /* extended transmit ACCM */
-static u_int32_t lcp_echos_pending = 0; /* Number of outstanding echo msgs */
-static u_int32_t lcp_echo_number = 0; /* ID number of next echo frame */
-static u_int32_t lcp_echo_timer_running = 0; /* set if a timer is running */
+static int lcp_echos_pending = 0; /* Number of outstanding echo msgs */
+static int lcp_echo_number = 0; /* ID number of next echo frame */
+static int lcp_echo_timer_running = 0; /* set if a timer is running */
static u_char nak_buffer[PPP_MRU]; /* where we construct a nak packet */
*/
#define CILEN_VOID 2
#define CILEN_CHAR 3
-#define CILEN_SHORT 4 /* CILEN_VOID + sizeof(short) */
-#define CILEN_CHAP 5 /* CILEN_VOID + sizeof(short) + 1 */
-#define CILEN_LONG 6 /* CILEN_VOID + sizeof(long) */
-#define CILEN_LQR 8 /* CILEN_VOID + sizeof(short) + sizeof(long) */
+#define CILEN_SHORT 4 /* CILEN_VOID + 2 */
+#define CILEN_CHAP 5 /* CILEN_VOID + 2 + 1 */
+#define CILEN_LONG 6 /* CILEN_VOID + 4 */
+#define CILEN_LQR 8 /* CILEN_VOID + 2 + 4 */
#define CILEN_CBCP 3
#define CODENAME(x) ((x) == CONFACK ? "ACK" : \
fsm *f = &lcp_fsm[unit];
if (phase != PHASE_DEAD)
- phase = PHASE_TERMINATE;
+ new_phase(PHASE_TERMINATE);
if (f->state == STOPPED && f->flags & (OPT_PASSIVE|OPT_SILENT)) {
/*
* This action is not strictly according to the FSM in RFC1548,
struct protent *protp;
u_short prot;
- if (len < sizeof (u_short)) {
+ if (len < 2) {
LCPDEBUG(("lcp_rprotrej: Rcvd short Protocol-Reject packet!"));
return;
}
lcp_resetci(f)
fsm *f;
{
- lcp_wantoptions[f->unit].magicnumber = magic();
- lcp_wantoptions[f->unit].numloops = 0;
- lcp_gotoptions[f->unit] = lcp_wantoptions[f->unit];
+ lcp_options *wo = &lcp_wantoptions[f->unit];
+
+ wo->magicnumber = magic();
+ wo->numloops = 0;
+ if (!wo->neg_multilink)
+ wo->neg_ssnhf = 0;
+ lcp_gotoptions[f->unit] = *wo;
peer_mru[f->unit] = PPP_MRU;
auth_reset(f->unit);
}
LENCICBCP(go->neg_cbcp) +
LENCILONG(go->neg_magicnumber) +
LENCIVOID(go->neg_pcompression) +
- LENCIVOID(go->neg_accompression));
+ LENCIVOID(go->neg_accompression) +
+ LENCISHORT(go->neg_multilink) +
+ LENCIVOID(go->neg_ssnhf) +
+ (go->neg_endpoint? CILEN_CHAR + go->endp_len: 0));
}
PUTCHAR(CILEN_CHAR, ucp); \
PUTCHAR(val, ucp); \
}
+#define ADDCIENDP(opt, neg, class, val, len) \
+ if (neg) { \
+ int i; \
+ PUTCHAR(opt, ucp); \
+ PUTCHAR(CILEN_CHAR + len, ucp); \
+ PUTCHAR(class, ucp); \
+ for (i = 0; i < len; ++i) \
+ PUTCHAR(val[i], ucp); \
+ }
ADDCISHORT(CI_MRU, go->neg_mru && go->mru != DEFMRU, go->mru);
ADDCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFF,
ADDCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
ADDCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
ADDCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
+ ADDCISHORT(CI_MRRU, go->neg_multilink, go->mrru);
+ ADDCIVOID(CI_SSNHF, go->neg_ssnhf);
+ ADDCIENDP(CI_EPDISC, go->neg_endpoint, go->endp_class, go->endpoint,
+ go->endp_len);
if (ucp - start_ucp != *lenp) {
/* this should never happen, because peer_mtu should be 1500 */
if (cilong != val) \
goto bad; \
}
+#define ACKCIENDP(opt, neg, class, val, vlen) \
+ if (neg) { \
+ int i; \
+ if ((len -= CILEN_CHAR + vlen) < 0) \
+ goto bad; \
+ GETCHAR(citype, p); \
+ GETCHAR(cilen, p); \
+ if (cilen != CILEN_CHAR + vlen || \
+ citype != opt) \
+ goto bad; \
+ GETCHAR(cichar, p); \
+ if (cichar != class) \
+ goto bad; \
+ for (i = 0; i < vlen; ++i) { \
+ GETCHAR(cichar, p); \
+ if (cichar != val[i]) \
+ goto bad; \
+ } \
+ }
ACKCISHORT(CI_MRU, go->neg_mru && go->mru != DEFMRU, go->mru);
ACKCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFF,
ACKCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
ACKCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
ACKCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
+ ACKCISHORT(CI_MRRU, go->neg_multilink, go->mrru);
+ ACKCIVOID(CI_SSNHF, go->neg_ssnhf);
+ ACKCIENDP(CI_EPDISC, go->neg_endpoint, go->endp_class, go->endpoint,
+ go->endp_len);
/*
* If there are any remaining CIs, then this packet is bad.
* Check packet length and CI length at each step.
* If we find any deviations, then this packet is bad.
*/
-#define NAKCIVOID(opt, neg, code) \
+#define NAKCIVOID(opt, neg) \
if (go->neg && \
len >= CILEN_VOID && \
p[1] == CILEN_VOID && \
len -= CILEN_VOID; \
INCPTR(CILEN_VOID, p); \
no.neg = 1; \
- code \
+ try.neg = 0; \
}
#define NAKCICHAP(opt, neg, code) \
if (go->neg && \
no.neg = 1; \
code \
}
+#define NAKCIENDP(opt, neg) \
+ if (go->neg && \
+ len >= CILEN_CHAR && \
+ p[0] == opt && \
+ p[1] >= CILEN_CHAR && \
+ p[1] <= len) { \
+ len -= p[1]; \
+ INCPTR(p[1], p); \
+ no.neg = 1; \
+ try.neg = 0; \
+ }
/*
* We don't care if they want to send us smaller packets than
if (go->neg_chap) {
/*
* We were asking for CHAP/MD5; they must want a different
- * algorithm. If they can't do MD5, we'll have to stop
+ * algorithm. If they can't do MD5, we can ask for M$-CHAP
+ * if we support it, otherwise we'll have to stop
* asking for CHAP.
*/
- if (cichar != go->chap_mdtype)
- try.neg_chap = 0;
+ if (cichar != go->chap_mdtype) {
+#ifdef CHAPMS
+ if (cichar == CHAP_MICROSOFT)
+ go->chap_mdtype = CHAP_MICROSOFT;
+ else
+#endif /* CHAPMS */
+ try.neg_chap = 0;
+ }
} else {
/*
* Stop asking for PAP if we were asking for it.
* address/control compression requests; they should send
* a Reject instead. If they send a Nak, treat it as a Reject.
*/
- NAKCIVOID(CI_PCOMPRESSION, neg_pcompression,
- try.neg_pcompression = 0;
- );
- NAKCIVOID(CI_ACCOMPRESSION, neg_accompression,
- try.neg_accompression = 0;
- );
+ NAKCIVOID(CI_PCOMPRESSION, neg_pcompression);
+ NAKCIVOID(CI_ACCOMPRESSION, neg_accompression);
+
+ /*
+ * Nak for MRRU option - accept their value if it is smaller
+ * than the one we want.
+ */
+ if (go->neg_multilink) {
+ NAKCISHORT(CI_MRRU, neg_multilink,
+ if (cishort <= wo->mrru)
+ try.mrru = cishort;
+ );
+ }
+
+ /*
+ * Nak for short sequence numbers shouldn't be sent, treat it
+ * like a reject.
+ */
+ NAKCIVOID(CI_SSNHF, neg_ssnhf);
+
+ /*
+ * Nak of the endpoint discriminator option is not permitted,
+ * treat it like a reject.
+ */
+ NAKCIENDP(CI_EPDISC, neg_endpoint);
/*
* There may be remaining CIs, if the peer is requesting negotiation
|| no.neg_mru || cilen != CILEN_SHORT)
goto bad;
GETSHORT(cishort, p);
- if (cishort < DEFMRU)
+ if (cishort < DEFMRU) {
+ try.neg_mru = 1;
try.mru = cishort;
+ }
break;
case CI_ASYNCMAP:
if ((go->neg_asyncmap && go->asyncmap != 0xFFFFFFFF)
if (go->neg_lqr || no.neg_lqr || cilen != CILEN_LQR)
goto bad;
break;
+ case CI_MRRU:
+ if (go->neg_multilink || no.neg_multilink || cilen != CILEN_SHORT)
+ goto bad;
+ break;
+ case CI_SSNHF:
+ if (go->neg_ssnhf || no.neg_ssnhf || cilen != CILEN_VOID)
+ goto bad;
+ try.neg_ssnhf = 1;
+ break;
+ case CI_EPDISC:
+ if (go->neg_endpoint || no.neg_endpoint || cilen < CILEN_CHAR)
+ goto bad;
+ break;
}
p = next;
}
if (++try.numloops >= lcp_loopbackfail) {
notice("Serial line is looped back.");
lcp_close(f->unit, "Loopback detected");
+ status = EXIT_LOOPBACK;
}
} else
try.numloops = 0;
goto bad; \
try.neg = 0; \
}
+#define REJCIENDP(opt, neg, class, val, vlen) \
+ if (go->neg && \
+ len >= CILEN_CHAR + vlen && \
+ p[0] == opt && \
+ p[1] == CILEN_CHAR + vlen) { \
+ int i; \
+ len -= CILEN_CHAR + vlen; \
+ INCPTR(p[1], p); \
+ GETCHAR(cichar, p); \
+ if (cichar != class) \
+ goto bad; \
+ for (i = 0; i < vlen; ++i) { \
+ GETCHAR(cichar, p); \
+ if (cichar != val[i]) \
+ goto bad; \
+ } \
+ try.neg = 0; \
+ }
REJCISHORT(CI_MRU, neg_mru, go->mru);
REJCILONG(CI_ASYNCMAP, neg_asyncmap, go->asyncmap);
REJCILONG(CI_MAGICNUMBER, neg_magicnumber, go->magicnumber);
REJCIVOID(CI_PCOMPRESSION, neg_pcompression);
REJCIVOID(CI_ACCOMPRESSION, neg_accompression);
+ REJCISHORT(CI_MRRU, neg_multilink, go->mrru);
+ REJCIVOID(CI_SSNHF, neg_ssnhf);
+ REJCIENDP(CI_EPDISC, neg_endpoint, go->endp_class, go->endpoint,
+ go->endp_len);
/*
* If there are any remaining CIs, then this packet is bad.
GETSHORT(cishort, p);
/*
- * Authtype must be UPAP or CHAP.
+ * Authtype must be PAP or CHAP.
*
* Note: if both ao->neg_upap and ao->neg_chap are set,
* and the peer sends a Configure-Request with two
PUTCHAR(CILEN_CHAP, nakp);
PUTSHORT(PPP_CHAP, nakp);
PUTCHAR(ao->chap_mdtype, nakp);
+ /* XXX if we can do CHAP_MICROSOFT as well, we should
+ probably put in another option saying so */
break;
}
ho->neg_upap = 1;
ho->neg_accompression = 1;
break;
+ case CI_MRRU:
+ if (!ao->neg_multilink ||
+ cilen != CILEN_SHORT) {
+ orc = CONFREJ;
+ break;
+ }
+
+ GETSHORT(cishort, p);
+ /* possibly should insist on a minimum/maximum MRRU here */
+ ho->neg_multilink = 1;
+ ho->mrru = cishort;
+ break;
+
+ case CI_SSNHF:
+ if (!ao->neg_ssnhf ||
+ cilen != CILEN_VOID) {
+ orc = CONFREJ;
+ break;
+ }
+ ho->neg_ssnhf = 1;
+ break;
+
+ case CI_EPDISC:
+ if (!ao->neg_endpoint ||
+ cilen < CILEN_CHAR ||
+ cilen > CILEN_CHAR + MAX_ENDP_LEN) {
+ orc = CONFREJ;
+ break;
+ }
+ GETCHAR(cichar, p);
+ cilen -= CILEN_CHAR;
+ ho->neg_endpoint = 1;
+ ho->endp_class = cichar;
+ ho->endp_len = cilen;
+ BCOPY(p, ho->endpoint, cilen);
+ INCPTR(cilen, p);
+ break;
+
default:
LCPDEBUG(("lcp_reqci: rcvd unknown option %d", citype));
orc = CONFREJ;
"EchoReq", "EchoRep", "DiscReq"
};
+static char *endp_class_names[] = {
+ "null", "local", "IP", "MAC", "magic", "phone"
+};
+
static int
lcp_printpkt(p, plen, printer, arg)
u_char *p;
void (*printer) __P((void *, char *, ...));
void *arg;
{
- int code, id, len, olen;
+ int code, id, len, olen, i;
u_char *pstart, *optend;
+ u_char cichar;
u_short cishort;
u_int32_t cilong;
printer(arg, "accomp");
}
break;
+ case CI_MRRU:
+ if (olen == CILEN_SHORT) {
+ p += 2;
+ GETSHORT(cishort, p);
+ printer(arg, "mrru %d", cishort);
+ }
+ break;
+ case CI_SSNHF:
+ if (olen == CILEN_VOID) {
+ p += 2;
+ printer(arg, "ssnhf");
+ }
+ break;
+ case CI_EPDISC:
+ if (olen >= CILEN_CHAR) {
+ p += 2;
+ GETCHAR(cichar, p);
+ if (cichar <= 5)
+ printer(arg, "endpoint [%s]:",
+ endp_class_names[cichar]);
+ else
+ printer(arg, "endpoint [%d]:");
+ }
+ break;
}
while (p < optend) {
GETCHAR(code, p);
}
/* print the rest of the bytes in the packet */
- for (; len > 0; --len) {
+ for (i = 0; i < len && i < 32; ++i) {
GETCHAR(code, p);
printer(arg, " %.2x", code);
}
+ if (i < len) {
+ printer(arg, " ...");
+ p += len - i;
+ }
return p - pstart;
}
fsm *f;
{
LcpSendEchoRequest (f);
+ if (f->state != OPENED)
+ return;
/*
* Start the timer for the next interval.
static void
lcp_received_echo_reply (f, id, inp, len)
fsm *f;
- int id; u_char *inp; int len;
+ int id;
+ u_char *inp;
+ int len;
{
u_int32_t magic;
projects / ppp.git / blobdiff