void call_close (struct call *c)
{
struct buffer *buf;
struct schedule_entry *se, *ose;
struct call *tmp, *tmp2;
if (!c || !c->container)
{
l2tp_log (LOG_DEBUG, "%s: called on null call or containerless call\n",
__FUNCTION__);
return;
}
if (c == c->container->self)
{
/*
* We're actually closing the
* entire tunnel
*/
/* First deschedule any remaining packet transmissions
for this tunnel. That means Hello's and any reminaing
packets scheduled for transmission. This is a very
nasty little piece of code here. */
se = events;
ose = NULL;
while (se)
{
if ((((struct buffer *) se->data)->tunnel == c->container)
|| ((struct tunnel *) se->data == c->container))
{
#ifdef DEBUG_CLOSE
l2tp_log (LOG_DEBUG, "%s: Descheduling event\n", __FUNCTION__);
#endif
if (ose)
{
ose->next = se->next;
if ((struct tunnel *) se->data != c->container)
toss ((struct buffer *) (se->data));
free (se);
se = ose->next;
}
else
{
events = se->next;
if ((struct tunnel *) se->data != c->container)
toss ((struct buffer *) (se->data));
free (se);
se = events;
}
}
else
{
ose = se;
se = se->next;
}
}
if (c->closing)
{
/* Really close this tunnel, as our
StopCCN has been ack'd */
#ifdef DEBUG_CLOSE
l2tp_log (LOG_DEBUG, "%s: Actually closing tunnel %d\n", __FUNCTION__,
c->container->ourtid);
#endif
#ifdef USE_KERNEL
if (kernel_support)
ioctl (server_socket, L2TPIOCDELTUNNEL, c->container->ourtid);
#endif
destroy_tunnel (c->container);
return;
}
/*
* We need to close, but need to provide reliable delivery
* of the final StopCCN. We record our state to know when
* we have actually received an ACK on our StopCCN
*/
c->closeSs = c->container->control_seq_num;
buf = new_outgoing (c->container);
add_message_type_avp (buf, StopCCN);
if (c->container->hbit)
{
mk_challenge (c->container->chal_them.vector, VECTOR_SIZE);
add_randvect_avp (buf, c->container->chal_them.vector,
VECTOR_SIZE);
}
add_tunnelid_avp (buf, c->container->ourtid);
if (c->result < 0)
c->result = RESULT_CLEAR;
if (c->error < 0)
c->error = 0;
add_result_code_avp (buf, c->result, c->error, c->errormsg,
strlen (c->errormsg));
add_control_hdr (c->container, c, buf);
if (packet_dump)
do_packet_dump (buf);
#ifdef DEBUG_CLOSE
l2tp_log (LOG_DEBUG, "%s: enqueing close message for tunnel\n",
__FUNCTION__);
#endif
control_xmit (buf);
/*
* We also need to stop all traffic on any calls contained
* within us.
*/
tmp = c->container->call_head;
while (tmp)
{
tmp2 = tmp->next;
tmp->needclose = 0;
tmp->closing = -1;
call_close (tmp);
tmp = tmp2;
}
/* mf, 16.04.2003: change log message to show tunneltag */
// l2tp_log (LOG_LOG,
// "%s : Connection %d closed to %s, port %d (%s)\n", __FUNCTION__,
// c->container->tid,
// IPADDY (c->container->peer.sin_addr),
// ntohs (c->container->peer.sin_port), c->errormsg);
l2tp_log (LOG_LOG,
"%s : Connection closed with peer %s, reason: %s\n",
__FUNCTION__, c->container->tunneltag, c->errormsg);
}
else
{
/*
* Just close a call
*/
#ifdef USE_KERNEL
struct l2tp_call_opts co;
#endif
if (c->zlb_xmit)
deschedule (c->zlb_xmit);
/* if (c->dethrottle) deschedule(c->dethrottle); */
if (c->closing)
{
#ifdef DEBUG_CLOSE
l2tp_log (LOG_DEBUG, "%s: Actually closing call %d\n", __FUNCTION__,
c->ourcid);
#endif
destroy_call (c);
return;
}
#ifdef USE_KERNEL
if (kernel_support)
{
co.ourtid = c->container->ourtid;
co.ourcid = c->ourcid;
ioctl (server_socket, L2TPIOCGETCALLOPTS, &co);
co.flags = co.flags & ~L2TP_FLAG_CALL_UP;
ioctl (server_socket, L2TPIOCSETCALLOPTS, &co);
}
#endif
c->closeSs = c->container->control_seq_num;
buf = new_outgoing (c->container);
add_message_type_avp (buf, CDN);
if (c->container->hbit)
{
mk_challenge (c->container->chal_them.vector, VECTOR_SIZE);
add_randvect_avp (buf, c->container->chal_them.vector,
VECTOR_SIZE);
}
if (c->result < 0)
c->result = RESULT_CLEAR;
if (c->error < 0)
c->error = 0;
add_result_code_avp (buf, c->result, c->error, c->errormsg,
strlen (c->errormsg));
#ifdef TEST_HIDDEN
add_callid_avp (buf, c->ourcid, c->container);
#else
add_callid_avp (buf, c->ourcid);
#endif
add_control_hdr (c->container, c, buf);
if (packet_dump)
do_packet_dump (buf);
#ifdef DEBUG_CLOSE
l2tp_log (LOG_DEBUG, "%s: enqueuing close message for call %d\n",
__FUNCTION__, c->ourcid);
#endif
control_xmit (buf);
l2tp_log (LOG_LOG, "%s: Call %d to %s disconnected\n", __FUNCTION__,
c->ourcid, IPADDY (c->container->peer.sin_addr));
}
/*
* Note that we're in the process of closing now
*/
c->closing = -1;
}
void call_close (struct call *c)
{
struct buffer *buf;
struct schedule_entry *se, *ose;
struct call *tmp, *tmp2;
if (!c || !c->container)
{
l2tp_log (LOG_DEBUG, "%s: called on null call or containerless call\n",
__FUNCTION__);
return;
}
if (c == c->container->self)
{
/*
* We're actually closing the
* entire tunnel
*/
/* First deschedule any remaining packet transmissions
for this tunnel. That means Hello's and any reminaing
packets scheduled for transmission. This is a very
nasty little piece of code here. */
se = events;
ose = NULL;
while (se)
{
if ((((struct buffer *) se->data)->tunnel == c->container)
|| ((struct tunnel *) se->data == c->container))
{
#ifdef DEBUG_CLOSE
l2tp_log (LOG_DEBUG, "%s: Descheduling event\n", __FUNCTION__);
#endif
if (ose)
{
ose->next = se->next;
if ((struct tunnel *) se->data != c->container)
toss ((struct buffer *) (se->data));
free (se);
se = ose->next;
}
else
{
events = se->next;
if ((struct tunnel *) se->data != c->container)
toss ((struct buffer *) (se->data));
free (se);
se = events;
}
}
else
{
ose = se;
se = se->next;
}
}
if (c->closing)
{
/* Really close this tunnel, as our
StopCCN has been ack'd */
#ifdef DEBUG_CLOSE
l2tp_log (LOG_DEBUG, "%s: Actually closing tunnel %d\n", __FUNCTION__,
c->container->ourtid);
#endif
destroy_tunnel (c->container);
return;
}
/*
* We need to close, but need to provide reliable delivery
* of the final StopCCN. We record our state to know when
* we have actually received an ACK on our StopCCN
*/
c->closeSs = c->container->control_seq_num;
buf = new_outgoing (c->container);
add_message_type_avp (buf, StopCCN);
if (c->container->hbit)
{
mk_challenge (c->container->chal_them.vector, VECTOR_SIZE);
add_randvect_avp (buf, c->container->chal_them.vector,
VECTOR_SIZE);
}
add_tunnelid_avp (buf, c->container->ourtid);
if (c->result < 0)
c->result = RESULT_CLEAR;
if (c->error < 0)
c->error = 0;
add_result_code_avp (buf, c->result, c->error, c->errormsg,
strlen (c->errormsg));
add_control_hdr (c->container, c, buf);
if (gconfig.packet_dump)
do_packet_dump (buf);
#ifdef DEBUG_CLOSE
l2tp_log (LOG_DEBUG, "%s: enqueing close message for tunnel\n",
__FUNCTION__);
#endif
control_xmit (buf);
/*
* We also need to stop all traffic on any calls contained
* within us.
*/
tmp = c->container->call_head;
while (tmp)
{
tmp2 = tmp->next;
tmp->needclose = 0;
tmp->closing = -1;
call_close (tmp);
tmp = tmp2;
}
l2tp_log (LOG_DEBUG, "Connection %d closed to %s, port %d (%s)\n",
c->container->tid,
IPADDY (c->container->peer.sin_addr),
ntohs (c->container->peer.sin_port), c->errormsg);
if(strcmp(c->errormsg,"Server closing") )
{
if(!strcmp(c->errormsg,"goodbye!") )
l2tp_log (LOG_INFO,
"Terminated by router connect %s, cause manual disconnect.\n", IPADDY (c->container->peer.sin_addr) );
else if( c->msgtype <= 0 || c->msgtype > 16 )
l2tp_log (LOG_INFO, "Detect %s from %s, port %d \n",
c->errormsg, IPADDY (c->container->peer.sin_addr),
ntohs (c->container->peer.sin_port));
else
l2tp_log (LOG_INFO, "Detect %s %s from %s, port %d \n",
msgtypes[c->msgtype],c->errormsg, IPADDY (c->container->peer.sin_addr),
ntohs (c->container->peer.sin_port));
}
//if( (!strcmp(c->errormsg, "Timeout")) && (c->container->tid != 0) )
// l2tp_log(LOG_INFO, "Terminated by router, cause no response to echo-requests.");
}
else
{
/*
* Just close a call
*/
if (c->zlb_xmit)
deschedule (c->zlb_xmit);
/* if (c->dethrottle) deschedule(c->dethrottle); */
if (c->closing)
{
#ifdef DEBUG_CLOSE
l2tp_log (LOG_DEBUG, "%s: Actually closing call %d\n", __FUNCTION__,
c->ourcid);
#endif
destroy_call (c);
return;
}
c->closeSs = c->container->control_seq_num;
buf = new_outgoing (c->container);
add_message_type_avp (buf, CDN);
if (c->container->hbit)
{
mk_challenge (c->container->chal_them.vector, VECTOR_SIZE);
add_randvect_avp (buf, c->container->chal_them.vector,
VECTOR_SIZE);
}
if (c->result < 0)
c->result = RESULT_CLEAR;
if (c->error < 0)
c->error = 0;
add_result_code_avp (buf, c->result, c->error, c->errormsg,
strlen (c->errormsg));
#ifdef TEST_HIDDEN
add_callid_avp (buf, c->ourcid, c->container);
#else
add_callid_avp (buf, c->ourcid);
#endif
add_control_hdr (c->container, c, buf);
if (gconfig.packet_dump)
do_packet_dump (buf);
#ifdef DEBUG_CLOSE
l2tp_log (LOG_DEBUG, "%s: enqueuing close message for call %d\n",
__FUNCTION__, c->ourcid);
#endif
control_xmit (buf);
l2tp_log (LOG_DEBUG, "%s: Call %d to %s disconnected\n", __FUNCTION__,
c->ourcid, IPADDY (c->container->peer.sin_addr));
}
/*
* Note that we're in the process of closing now
*/
c->closing = -1;
}