/* -----------------------------------------------------------------------------
called back everytime we go out of select, and data needs to be read
the hook is called and has a chance to get data out of its file descriptor
in the case of PPPoE, we are not supposed to get data on the socket
if our socket gets awaken, that's because is has been closed
----------------------------------------------------------------------------- */
void pppoe_wait_input()
{
if (sockfd != -1 && is_ready_fd(sockfd)) {
// looks like we have been disconnected...
// the status is updated only if link is not already down
if (linkdown == 0) {
notice("PPPoE hangup");
status = EXIT_HANGUP;
}
remove_fd(sockfd);
hungup = 1;
lcp_lowerdown(0); /* PPPoE link is no longer available */
link_terminated(0);
}
}
/*
* get_input - called when incoming data is available.
*/
static void
get_input(void)
{
int len, i;
u_char *p;
u_short protocol;
struct protent *protp;
p = inpacket_buf; /* point to beginning of packet buffer */
len = read_packet(inpacket_buf);
if (len < 0)
return;
if (len == 0) {
etime = time(NULL);
minutes = (etime-stime)/60;
syslog(LOG_NOTICE, "Modem hangup, connected for %d minutes", (minutes >1) ? minutes : 1);
hungup = 1;
lcp_lowerdown(0); /* serial link is no longer available */
link_terminated(0);
return;
}
if (debug /*&& (debugflags & DBG_INPACKET)*/)
log_packet(p, len, "rcvd ", LOG_DEBUG);
if (len < PPP_HDRLEN) {
MAINDEBUG((LOG_INFO, "io(): Received short packet."));
return;
}
p += 2; /* Skip address and control */
GETSHORT(protocol, p);
len -= PPP_HDRLEN;
/*
* Toss all non-LCP packets unless LCP is OPEN.
*/
if (protocol != PPP_LCP && lcp_fsm[0].state != OPENED) {
MAINDEBUG((LOG_INFO,
"get_input: Received non-LCP packet when LCP not open."));
return;
}
/*
* Until we get past the authentication phase, toss all packets
* except LCP, LQR and authentication packets.
*/
if (phase <= PHASE_AUTHENTICATE
&& !(protocol == PPP_LCP || protocol == PPP_LQR
|| protocol == PPP_PAP || protocol == PPP_CHAP)) {
MAINDEBUG((LOG_INFO, "get_input: discarding proto 0x%x in phase %d",
protocol, phase));
return;
}
/*
* Upcall the proper protocol input routine.
*/
for (i = 0; (protp = protocols[i]) != NULL; ++i) {
if (protp->protocol == protocol && protp->enabled_flag) {
(*protp->input)(0, p, len);
return;
}
if (protocol == (protp->protocol & ~0x8000) && protp->enabled_flag
&& protp->datainput != NULL) {
(*protp->datainput)(0, p, len);
return;
}
}
if (debug)
syslog(LOG_WARNING, "Unsupported protocol (0x%x) received", protocol);
lcp_sprotrej(0, p - PPP_HDRLEN, len + PPP_HDRLEN);
}
/*
* get_input - called when incoming data is available.
*/
static void
get_input(void)
{
int len, i;
u_char *p;
u_short protocol;
struct protent *protp;
p = inpacket_buf; /* point to beginning of packet buffer */
len = read_packet(inpacket_buf);
if (len < 0)
return;
if (len == 0) {
notice("Modem hangup");
hungup = 1;
pppd_status = EXIT_HANGUP;
lcp_lowerdown(0); /* serial link is no longer available */
link_terminated(0);
return;
}
if (debug /*&& (debugflags & DBG_INPACKET)*/)
dbglog("rcvd %P", p, len);
if (len < PPP_HDRLEN) {
MAINDEBUG(("io(): Received short packet."));
return;
}
p += 2; /* Skip address and control */
GETSHORT(protocol, p);
len -= PPP_HDRLEN;
/*
* Toss all non-LCP packets unless LCP is OPEN.
*/
if (protocol != PPP_LCP && lcp_fsm[0].state != OPENED) {
MAINDEBUG(("get_input: Received non-LCP packet when LCP not open."));
return;
}
/*
* Until we get past the authentication phase, toss all packets
* except LCP, LQR and authentication packets.
*/
if (pppd_phase <= PHASE_AUTHENTICATE
&& !(protocol == PPP_LCP || protocol == PPP_LQR
|| protocol == PPP_PAP || protocol == PPP_CHAP)) {
MAINDEBUG(("get_input: discarding proto 0x%x in phase %d",
protocol, pppd_phase));
return;
}
/*
* Upcall the proper protocol input routine.
*/
for (i = 0; (protp = protocols[i]) != NULL; ++i) {
if (protp->protocol == protocol && protp->enabled_flag) {
(*protp->input)(0, p, len);
return;
}
if (protocol == (protp->protocol & ~0x8000) && protp->enabled_flag
&& protp->datainput != NULL) {
(*protp->datainput)(0, p, len);
return;
}
}
if (debug) {
const char *pname = protocol_name(protocol);
if (pname != NULL)
warn("Unsupported protocol '%s' (0x%x) received", pname, protocol);
else
warn("Unsupported protocol 0x%x received", protocol);
}
lcp_sprotrej(0, p - PPP_HDRLEN, len + PPP_HDRLEN);
return;
}
int
pppdmain(
int argc,
char *argv[])
{
int i, fdflags, t;
char *connector;
struct timeval timo;
struct protent *protp;
new_phase(PHASE_INITIALIZE);
script_env = NULL;
hostname[MAXNAMELEN-1] = 0;
privileged = 1;
privileged_option = 1;
/*
* Initialize magic number generator now so that protocols may
* use magic numbers in initialization.
*/
magic_init();
#ifdef XXX_XXX
/* moved code the the rtems_pppd_reset_options function */
/*
* Initialize to the standard option set, then parse, in order,
* the system options file, the user's options file,
* the tty's options file, and the command line arguments.
*/
for (i = 0; (protp = protocols[i]) != NULL; ++i)
(*protp->init)(0);
#endif
if (!ppp_available()) {
option_error(no_ppp_msg);
return(EXIT_NO_KERNEL_SUPPORT);
}
/*
* Check that the options given are valid and consistent.
*/
if (!sys_check_options()) {
return(EXIT_OPTION_ERROR);
}
if (!auth_check_options()) {
return(EXIT_OPTION_ERROR);
}
for (i = 0; (protp = protocols[i]) != NULL; ++i)
if (protp->check_options != NULL)
(*protp->check_options)();
/* default holdoff to 0 if no connect script has been given */
if (connect_script == 0 && !holdoff_specified)
holdoff = 0;
if (default_device)
nodetach = 1;
/*
* Initialize system-dependent stuff.
*/
sys_init();
/* if (debug)
setlogmask(LOG_UPTO(LOG_DEBUG));
*/
do_callback = 0;
for (;;) {
need_holdoff = 1;
pppd_ttyfd = -1;
real_ttyfd = -1;
pppd_status = EXIT_OK;
++unsuccess;
doing_callback = do_callback;
do_callback = 0;
new_phase(PHASE_SERIALCONN);
/*
* Get a pty master/slave pair if the pty, notty, or record
* options were specified.
*/
strlcpy(ppp_devnam, devnam, sizeof(ppp_devnam));
pty_master = -1;
pty_slave = -1;
/*
* Open the serial device and set it up to be the ppp interface.
* First we open it in non-blocking mode so we can set the
* various termios flags appropriately. If we aren't dialling
* out and we want to use the modem lines, we reopen it later
* in order to wait for the carrier detect signal from the modem.
*/
hungup = 0;
pppd_kill_link = 0;
connector = doing_callback? callback_script: connect_script;
if (devnam[0] != 0) {
for (;;) {
/* If the user specified the device name, become the
user before opening it. */
int err;
pppd_ttyfd = open(devnam, O_NONBLOCK | O_RDWR, 0);
err = errno;
if (pppd_ttyfd >= 0) {
break;
}
errno = err;
if (err != EINTR) {
error("Failed to open %s: %m", devnam);
pppd_status = EXIT_OPEN_FAILED;
}
if (!persist || err != EINTR)
goto fail;
}
if ((fdflags = fcntl(pppd_ttyfd, F_GETFL)) == -1
|| fcntl(pppd_ttyfd, F_SETFL, fdflags & ~O_NONBLOCK) < 0)
warn("Couldn't reset non-blocking mode on device: %m");
/*
* Set line speed, flow control, etc.
* If we have a non-null connection or initializer script,
* on most systems we set CLOCAL for now so that we can talk
* to the modem before carrier comes up. But this has the
* side effect that we might miss it if CD drops before we
* get to clear CLOCAL below. On systems where we can talk
* successfully to the modem with CLOCAL clear and CD down,
* we could clear CLOCAL at this point.
*/
set_up_tty(pppd_ttyfd, ((connector != NULL && connector[0] != 0)
|| initializer != NULL));
real_ttyfd = pppd_ttyfd;
}
/* run connection script */
if ((connector && connector[0]) || initializer) {
if (real_ttyfd != -1) {
/* XXX do this if doing_callback == CALLBACK_DIALIN? */
if (!default_device && modem) {
setdtr(real_ttyfd, 0); /* in case modem is off hook */
sleep(1);
setdtr(real_ttyfd, 1);
}
}
if (initializer && initializer[0]) {
if (device_script(pppd_ttyfd, DIALER_INIT, initializer) < 0) {
error("Initializer script failed");
pppd_status = EXIT_INIT_FAILED;
goto fail;
}
if (pppd_kill_link)
goto disconnect;
info("Serial port initialized.");
}
if (connector && connector[0]) {
if (device_script(pppd_ttyfd, DIALER_CONNECT, connector) < 0) {
error("Connect script failed");
pppd_status = EXIT_CONNECT_FAILED;
goto fail;
}
if (pppd_kill_link)
goto disconnect;
info("Serial connection established.");
}
/* set line speed, flow control, etc.;
clear CLOCAL if modem option */
if (real_ttyfd != -1)
set_up_tty(real_ttyfd, 0);
if (doing_callback == CALLBACK_DIALIN)
connector = NULL;
}
/* reopen tty if necessary to wait for carrier */
if (connector == NULL && modem && devnam[0] != 0) {
for (;;) {
if ((i = open(devnam, O_RDWR)) >= 0)
break;
if (errno != EINTR) {
error("Failed to reopen %s: %m", devnam);
pppd_status = EXIT_OPEN_FAILED;
}
if (!persist || errno != EINTR || hungup || pppd_kill_link)
goto fail;
}
close(i);
}
info("Serial connection established.");
sleep(1);
/* run welcome script, if any */
if (welcomer && welcomer[0]) {
if (device_script(pppd_ttyfd, DIALER_WELCOME, welcomer) < 0)
warn("Welcome script failed");
}
/* set up the serial device as a ppp interface */
fd_ppp = establish_ppp(pppd_ttyfd);
if (fd_ppp < 0) {
pppd_status = EXIT_FATAL_ERROR;
goto disconnect;
}
if (!demand) {
info("Using interface ppp%d", pppifunit);
slprintf(ifname, sizeof(ifname), "ppp%d", pppifunit);
}
/*
* Start opening the connection and wait for
* incoming events (reply, timeout, etc.).
*/
notice("Connect: %s <--> %s", ifname, ppp_devnam);
gettimeofday(&start_time, NULL);
lcp_lowerup(0);
lcp_open(0); /* Start protocol */
open_ccp_flag = 0;
pppd_status = EXIT_NEGOTIATION_FAILED;
new_phase(PHASE_ESTABLISH);
while (pppd_phase != PHASE_DEAD) {
wait_input(timeleft(&timo));
calltimeout();
get_input();
if (pppd_kill_link) {
lcp_close(0, "User request");
pppd_kill_link = 0;
}
if (open_ccp_flag) {
if (pppd_phase == PHASE_NETWORK || pppd_phase == PHASE_RUNNING) {
ccp_fsm[0].flags = OPT_RESTART; /* clears OPT_SILENT */
(*ccp_protent.open)(0);
}
open_ccp_flag = 0;
}
}
/*
* If we may want to bring the link up again, transfer
* the ppp unit back to the loopback. Set the
* real serial device back to its normal mode of operation.
*/
clean_check();
if (demand)
restore_loop();
disestablish_ppp(pppd_ttyfd);
fd_ppp = -1;
if (!hungup)
lcp_lowerdown(0);
/*
* Run disconnector script, if requested.
* XXX we may not be able to do this if the line has hung up!
*/
disconnect:
if (disconnect_script && !hungup) {
new_phase(PHASE_DISCONNECT);
if (real_ttyfd >= 0)
set_up_tty(real_ttyfd, 1);
if (device_script(pppd_ttyfd, DIALER_DISCONNECT, disconnect_script) < 0) {
warn("disconnect script failed");
} else {
info("Serial link disconnected.");
}
}
fail:
if (pty_master >= 0)
close(pty_master);
if (pty_slave >= 0)
close(pty_slave);
if (real_ttyfd >= 0)
close_tty();
if (!persist || (maxfail > 0 && unsuccess >= maxfail))
break;
pppd_kill_link = 0;
if (demand)
demand_discard();
t = need_holdoff? holdoff: 0;
if (holdoff_hook)
t = (*holdoff_hook)();
if (t > 0) {
new_phase(PHASE_HOLDOFF);
TIMEOUT(holdoff_end, NULL, t);
do {
wait_input(timeleft(&timo));
calltimeout();
if (pppd_kill_link) {
pppd_kill_link = 0;
new_phase(PHASE_DORMANT); /* allow signal to end holdoff */
}
} while (pppd_phase == PHASE_HOLDOFF);
if (!persist)
break;
}
}
die(pppd_status);
return pppd_status;
}
void tty_detached(struct ttys *ttyp, int exiting)
{
struct ttys *ttyp_tmp, *ttyp_last = 0;
DEBUG_CALL("tty_detached");
DEBUG_ARG("ttyp = %lx", (long)ttyp);
DEBUG_ARG("exiting = %d", exiting);
/* First, remove ttyp from the queue */
if (ttyp == ttys) {
ttys = ttys->next;
} else {
for (ttyp_tmp = ttys; ttyp_tmp; ttyp_tmp = ttyp_tmp->next) {
if (ttyp_tmp == ttyp)
break;
ttyp_last = ttyp_tmp;
}
if (!ttyp_last) { /* XXX */
/* Can't find it *shrug* */
return;
}
ttyp_last->next = ttyp->next;
}
term_restore(ttyp);
#ifdef FULL_BOLT
fd_block(ttyp->fd);
#endif
/* Restore device mode */
if (ttyp->mode)
fchmod(ttyp->fd, ttyp->mode);
/* Bring the link down */
#ifdef USE_PPP
/*
* Call lcp_lowerdown if it's ppp
*/
if (ttyp->proto == PROTO_PPP) {
lcp_lowerdown(ttyp->unit);
phase = PHASE_DEAD; /* XXXXX */
}
#endif
/*
* Kill the guardian, if it exists
*/
if (ttyp->pid)
kill(ttyp->pid, SIGQUIT);
/*
* If this was the last tty and we're not restarting, exit
*/
if (!ttys && slirp_socket < 0 && !exiting)
slirp_exit(0);
close(ttyp->fd);
if (ttyp->m)
m_free(ttyp->m);
/*
* If this was the controlling tty, call ctty_detached
*/
if ((ttyp->flags & TTY_CTTY) && !exiting)
ctty_detached();
#ifdef USE_PPP
/* Deallocate compress data */
ppp_ccp_closed(ttyp);
#endif
ttys_unit[ttyp->unit] = 0;
/*
* If you love it, set it free() ...
* If it comes back, we have a memory leak
*/
free(ttyp);
detach_time = curtime;
}
