* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
-#define RCSID "$Id: lcp.c,v 1.76 2006/05/22 00:04:07 paulus Exp $"
-
-/*
- * TODO:
- */
-
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "chap-new.h"
#include "magic.h"
-static const char rcsid[] = RCSID;
/*
* When the link comes up we want to be able to wait for a short while,
/* steal a bit in fsm flags word */
#define DELAYED_UP 0x100
-static void lcp_delayed_up __P((void *));
+static void lcp_delayed_up(void *);
/*
* LCP-related command-line options.
*/
int lcp_echo_interval = 0; /* Interval between LCP echo-requests */
int lcp_echo_fails = 0; /* Tolerance to unanswered echo-requests */
+bool lcp_echo_adaptive = 0; /* request echo only if the link was idle */
bool lax_recv = 0; /* accept control chars in asyncmap */
bool noendpoint = 0; /* don't send/accept endpoint discriminator */
-static int noopt __P((char **));
+static int noopt(char **);
#ifdef HAVE_MULTILINK
-static int setendpoint __P((char **));
-static void printendpoint __P((option_t *, void (*)(void *, char *, ...),
- void *));
+static int setendpoint(char **);
+static void printendpoint(option_t *, void (*)(void *, char *, ...), void *);
#endif /* HAVE_MULTILINK */
static option_t lcp_option_list[] = {
OPT_PRIO },
{ "lcp-echo-interval", o_int, &lcp_echo_interval,
"Set time in seconds between LCP echo requests", OPT_PRIO },
+ { "lcp-echo-adaptive", o_bool, &lcp_echo_adaptive,
+ "Suppress LCP echo requests if traffic was received", 1 },
{ "lcp-restart", o_int, &lcp_fsm[0].timeouttime,
"Set time in seconds between LCP retransmissions", OPT_PRIO },
{ "lcp-max-terminate", o_int, &lcp_fsm[0].maxtermtransmits,
/*
* Callbacks for fsm code. (CI = Configuration Information)
*/
-static void lcp_resetci __P((fsm *)); /* Reset our CI */
-static int lcp_cilen __P((fsm *)); /* Return length of our CI */
-static void lcp_addci __P((fsm *, u_char *, int *)); /* Add our CI to pkt */
-static int lcp_ackci __P((fsm *, u_char *, int)); /* Peer ack'd our CI */
-static int lcp_nakci __P((fsm *, u_char *, int, int)); /* Peer nak'd our CI */
-static int lcp_rejci __P((fsm *, u_char *, int)); /* Peer rej'd our CI */
-static int lcp_reqci __P((fsm *, u_char *, int *, int)); /* Rcv peer CI */
-static void lcp_up __P((fsm *)); /* We're UP */
-static void lcp_down __P((fsm *)); /* We're DOWN */
-static void lcp_starting __P((fsm *)); /* We need lower layer up */
-static void lcp_finished __P((fsm *)); /* We need lower layer down */
-static int lcp_extcode __P((fsm *, int, int, u_char *, int));
-static void lcp_rprotrej __P((fsm *, u_char *, int));
+static void lcp_resetci(fsm *); /* Reset our CI */
+static int lcp_cilen(fsm *); /* Return length of our CI */
+static void lcp_addci(fsm *, u_char *, int *); /* Add our CI to pkt */
+static int lcp_ackci(fsm *, u_char *, int); /* Peer ack'd our CI */
+static int lcp_nakci(fsm *, u_char *, int, int); /* Peer nak'd our CI */
+static int lcp_rejci(fsm *, u_char *, int); /* Peer rej'd our CI */
+static int lcp_reqci(fsm *, u_char *, int *, int); /* Rcv peer CI */
+static void lcp_up(fsm *); /* We're UP */
+static void lcp_down(fsm *); /* We're DOWN */
+static void lcp_starting(fsm *); /* We need lower layer up */
+static void lcp_finished(fsm *); /* We need lower layer down */
+static int lcp_extcode(fsm *, int, int, u_char *, int);
+static void lcp_rprotrej(fsm *, u_char *, int);
/*
* routines to send LCP echos to peer
*/
-static void lcp_echo_lowerup __P((int));
-static void lcp_echo_lowerdown __P((int));
-static void LcpEchoTimeout __P((void *));
-static void lcp_received_echo_reply __P((fsm *, int, u_char *, int));
-static void LcpSendEchoRequest __P((fsm *));
-static void LcpLinkFailure __P((fsm *));
-static void LcpEchoCheck __P((fsm *));
+static void lcp_echo_lowerup(int);
+static void lcp_echo_lowerdown(int);
+static void LcpEchoTimeout(void *);
+static void lcp_received_echo_reply(fsm *, int, u_char *, int);
+static void LcpSendEchoRequest(fsm *);
+static void LcpLinkFailure(fsm *);
+static void LcpEchoCheck(fsm *);
static fsm_callbacks lcp_callbacks = { /* LCP callback routines */
lcp_resetci, /* Reset our Configuration Information */
* Some of these are called directly.
*/
-static void lcp_init __P((int));
-static void lcp_input __P((int, u_char *, int));
-static void lcp_protrej __P((int));
-static int lcp_printpkt __P((u_char *, int,
- void (*) __P((void *, char *, ...)), void *));
+static void lcp_init(int);
+static void lcp_input(int, u_char *, int);
+static void lcp_protrej(int);
+static int lcp_printpkt(u_char *, int, void (*)(void *, char *, ...), void *);
struct protent lcp_protent = {
PPP_LCP,
* noopt - Disable all options (why?).
*/
static int
-noopt(argv)
- char **argv;
+noopt(char **argv)
{
BZERO((char *) &lcp_wantoptions[0], sizeof (struct lcp_options));
BZERO((char *) &lcp_allowoptions[0], sizeof (struct lcp_options));
#ifdef HAVE_MULTILINK
static int
-setendpoint(argv)
- char **argv;
+setendpoint(char **argv)
{
if (str_to_epdisc(&lcp_wantoptions[0].endpoint, *argv)) {
lcp_wantoptions[0].neg_endpoint = 1;
}
static void
-printendpoint(opt, printer, arg)
- option_t *opt;
- void (*printer) __P((void *, char *, ...));
- void *arg;
+printendpoint(option_t *opt, void (*printer)(void *, char *, ...), void *arg)
{
printer(arg, "%s", epdisc_to_str(&lcp_wantoptions[0].endpoint));
}
* lcp_init - Initialize LCP.
*/
static void
-lcp_init(unit)
- int unit;
+lcp_init(int unit)
{
fsm *f = &lcp_fsm[unit];
lcp_options *wo = &lcp_wantoptions[unit];
* lcp_open - LCP is allowed to come up.
*/
void
-lcp_open(unit)
- int unit;
+lcp_open(int unit)
{
fsm *f = &lcp_fsm[unit];
lcp_options *wo = &lcp_wantoptions[unit];
* lcp_close - Take LCP down.
*/
void
-lcp_close(unit, reason)
- int unit;
- char *reason;
+lcp_close(int unit, char *reason)
{
fsm *f = &lcp_fsm[unit];
+ int oldstate;
if (phase != PHASE_DEAD && phase != PHASE_MASTER)
new_phase(PHASE_TERMINATE);
- if (f->state == STOPPED && f->flags & (OPT_PASSIVE|OPT_SILENT)) {
+
+ if (f->flags & DELAYED_UP) {
+ untimeout(lcp_delayed_up, f);
+ f->state = STOPPED;
+ }
+ oldstate = f->state;
+
+ fsm_close(f, reason);
+ if (oldstate == STOPPED && f->flags & (OPT_PASSIVE|OPT_SILENT|DELAYED_UP)) {
/*
* 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() in passive/silent mode when a connection hasn't
- * been established.
+ * lcp_close() when a connection hasn't been established
+ * because we are in passive/silent mode or because we have
+ * delayed the fsm_lowerup() call and it hasn't happened yet.
*/
- f->state = CLOSED;
+ f->flags &= ~DELAYED_UP;
lcp_finished(f);
-
- } else
- fsm_close(f, reason);
+ }
}
* lcp_lowerup - The lower layer is up.
*/
void
-lcp_lowerup(unit)
- int unit;
+lcp_lowerup(int unit)
{
lcp_options *wo = &lcp_wantoptions[unit];
fsm *f = &lcp_fsm[unit];
* lcp_lowerdown - The lower layer is down.
*/
void
-lcp_lowerdown(unit)
- int unit;
+lcp_lowerdown(int unit)
{
fsm *f = &lcp_fsm[unit];
- if (f->flags & DELAYED_UP)
+ if (f->flags & DELAYED_UP) {
f->flags &= ~DELAYED_UP;
- else
+ untimeout(lcp_delayed_up, f);
+ } else
fsm_lowerdown(&lcp_fsm[unit]);
}
* lcp_delayed_up - Bring the lower layer up now.
*/
static void
-lcp_delayed_up(arg)
- void *arg;
+lcp_delayed_up(void *arg)
{
fsm *f = arg;
* lcp_input - Input LCP packet.
*/
static void
-lcp_input(unit, p, len)
- int unit;
- u_char *p;
- int len;
+lcp_input(int unit, u_char *p, int len)
{
fsm *f = &lcp_fsm[unit];
if (f->flags & DELAYED_UP) {
f->flags &= ~DELAYED_UP;
+ untimeout(lcp_delayed_up, f);
fsm_lowerup(f);
}
fsm_input(f, p, len);
* lcp_extcode - Handle a LCP-specific code.
*/
static int
-lcp_extcode(f, code, id, inp, len)
- fsm *f;
- int code, id;
- u_char *inp;
- int len;
+lcp_extcode(fsm *f, int code, int id, u_char *inp, int len)
{
u_char *magp;
* Figure out which protocol is rejected and inform it.
*/
static void
-lcp_rprotrej(f, inp, len)
- fsm *f;
- u_char *inp;
- int len;
+lcp_rprotrej(fsm *f, u_char *inp, int len)
{
int i;
struct protent *protp;
*/
/*ARGSUSED*/
static void
-lcp_protrej(unit)
- int unit;
+lcp_protrej(int unit)
{
/*
* Can't reject LCP!
* lcp_sprotrej - Send a Protocol-Reject for some protocol.
*/
void
-lcp_sprotrej(unit, p, len)
- int unit;
- u_char *p;
- int len;
+lcp_sprotrej(int unit, u_char *p, int len)
{
/*
* Send back the protocol and the information field of the
* lcp_resetci - Reset our CI.
*/
static void
-lcp_resetci(f)
- fsm *f;
+lcp_resetci(fsm *f)
{
lcp_options *wo = &lcp_wantoptions[f->unit];
lcp_options *go = &lcp_gotoptions[f->unit];
* lcp_cilen - Return length of our CI.
*/
static int
-lcp_cilen(f)
- fsm *f;
+lcp_cilen(fsm *f)
{
lcp_options *go = &lcp_gotoptions[f->unit];
* lcp_addci - Add our desired CIs to a packet.
*/
static void
-lcp_addci(f, ucp, lenp)
- fsm *f;
- u_char *ucp;
- int *lenp;
+lcp_addci(fsm *f, u_char *ucp, int *lenp)
{
lcp_options *go = &lcp_gotoptions[f->unit];
u_char *start_ucp = ucp;
* 1 - Ack was good.
*/
static int
-lcp_ackci(f, p, len)
- fsm *f;
- u_char *p;
- int len;
+lcp_ackci(fsm *f, u_char *p, int len)
{
lcp_options *go = &lcp_gotoptions[f->unit];
u_char cilen, citype, cichar;
* 1 - Nak was good.
*/
static int
-lcp_nakci(f, p, len, treat_as_reject)
- fsm *f;
- u_char *p;
- int len;
- int treat_as_reject;
+lcp_nakci(fsm *f, u_char *p, int len, int treat_as_reject)
{
lcp_options *go = &lcp_gotoptions[f->unit];
lcp_options *wo = &lcp_wantoptions[f->unit];
* 1 - Reject was good.
*/
static int
-lcp_rejci(f, p, len)
- fsm *f;
- u_char *p;
- int len;
+lcp_rejci(fsm *f, u_char *p, int len)
{
lcp_options *go = &lcp_gotoptions[f->unit];
u_char cichar;
* CONFNAK; returns CONFREJ if it can't return CONFACK.
*/
static int
-lcp_reqci(f, inp, lenp, reject_if_disagree)
- fsm *f;
- u_char *inp; /* Requested CIs */
- int *lenp; /* Length of requested CIs */
- int reject_if_disagree;
+lcp_reqci(fsm *f, u_char *inp, int *lenp, int reject_if_disagree)
{
lcp_options *go = &lcp_gotoptions[f->unit];
lcp_options *ho = &lcp_hisoptions[f->unit];
* lcp_up - LCP has come UP.
*/
static void
-lcp_up(f)
- fsm *f;
+lcp_up(fsm *f)
{
lcp_options *wo = &lcp_wantoptions[f->unit];
lcp_options *ho = &lcp_hisoptions[f->unit];
* Alert other protocols.
*/
static void
-lcp_down(f)
- fsm *f;
+lcp_down(fsm *f)
{
lcp_options *go = &lcp_gotoptions[f->unit];
* lcp_starting - LCP needs the lower layer up.
*/
static void
-lcp_starting(f)
- fsm *f;
+lcp_starting(fsm *f)
{
link_required(f->unit);
}
* lcp_finished - LCP has finished with the lower layer.
*/
static void
-lcp_finished(f)
- fsm *f;
+lcp_finished(fsm *f)
{
link_terminated(f->unit);
}
};
static int
-lcp_printpkt(p, plen, printer, arg)
- u_char *p;
- int plen;
- void (*printer) __P((void *, char *, ...));
- void *arg;
+lcp_printpkt(u_char *p, int plen, void (*printer)(void *, char *, ...), void *arg)
{
int code, id, len, olen, i;
u_char *pstart, *optend;
printer(arg, " MD5");
++p;
break;
-#ifdef CHAPMS
case CHAP_MICROSOFT:
printer(arg, " MS");
++p;
printer(arg, " MS-v2");
++p;
break;
-#endif
}
}
break;
*/
static
-void LcpLinkFailure (f)
- fsm *f;
+void LcpLinkFailure (fsm *f)
{
if (f->state == OPENED) {
info("No response to %d echo-requests", lcp_echos_pending);
*/
static void
-LcpEchoCheck (f)
- fsm *f;
+LcpEchoCheck (fsm *f)
{
LcpSendEchoRequest (f);
if (f->state != OPENED)
*/
static void
-LcpEchoTimeout (arg)
- void *arg;
+LcpEchoTimeout (void *arg)
{
if (lcp_echo_timer_running != 0) {
lcp_echo_timer_running = 0;
*/
static void
-lcp_received_echo_reply (f, id, inp, len)
- fsm *f;
- int id;
- u_char *inp;
- int len;
+lcp_received_echo_reply (fsm *f, int id, u_char *inp, int len)
{
u_int32_t magic;
*/
static void
-LcpSendEchoRequest (f)
- fsm *f;
+LcpSendEchoRequest (fsm *f)
{
u_int32_t lcp_magic;
u_char pkt[4], *pktp;
}
}
+ /*
+ * If adaptive echos have been enabled, only send the echo request if
+ * no traffic was received since the last one.
+ */
+ if (lcp_echo_adaptive) {
+ static unsigned int last_pkts_in = 0;
+ struct pppd_stats cur_stats;
+
+ if (get_ppp_stats(f->unit, &cur_stats) && cur_stats.pkts_in != last_pkts_in) {
+ last_pkts_in = cur_stats.pkts_in;
+ return;
+ }
+ }
+
/*
* Make and send the echo request frame.
*/
*/
static void
-lcp_echo_lowerup (unit)
- int unit;
+lcp_echo_lowerup (int unit)
{
fsm *f = &lcp_fsm[unit];
*/
static void
-lcp_echo_lowerdown (unit)
- int unit;
+lcp_echo_lowerdown (int unit)
{
fsm *f = &lcp_fsm[unit];
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