/*
This file is part of GNUnet.
- (C) 2012 Christian Grothoff
+ Copyright (C) 2012 Christian Grothoff
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
*/
/**
/**
* Identifier of a reconnect task.
*/
- GNUNET_SCHEDULER_TaskIdentifier rt;
+ struct GNUNET_SCHEDULER_Task * rt;
+
+ /**
+ * How long do we wait until we try to reconnect?
+ */
+ struct GNUNET_TIME_Relative backoff;
/**
* ID of the last request that was submitted to the service.
* Function to call with the designated IP address.
*/
GNUNET_VPN_AllocationCallback cb;
-
+
/**
* Closure for 'cb'.
*/
/**
* For service redirection, service descriptor.
*/
- GNUNET_HashCode serv;
+ struct GNUNET_HashCode serv;
/**
* At what time should the created service mapping expire?
* Address family of 'addr'. AF_INET or AF_INET6.
*/
int addr_af;
-
- /**
- * GNUNET_YES if we are to call the callback only after successful
- * mesh tunnel creation.
- */
- int nac;
-
+
/**
* For service redirection, IPPROT_UDP or IPPROTO_TCP.
*/
/**
* Function called when we receive a message from the VPN service.
*
- * @param cls the 'struct GNUNET_VPN_Handle'
+ * @param cls the `struct GNUNET_VPN_Handle`
* @param msg message received, NULL on timeout or fatal error
*/
-static void
+static void
receive_response (void *cls,
const struct GNUNET_MessageHeader* msg)
{
size_t alen;
int af;
- if (NULL == msg)
+ if (NULL == msg)
{
reconnect (vh);
return;
GNUNET_break (0);
reconnect (vh);
return;
- }
+ }
+ GNUNET_CLIENT_receive (vh->client,
+ &receive_response, vh,
+ GNUNET_TIME_UNIT_FOREVER_REL);
for (rr = vh->rr_head; NULL != rr; rr = rr->next)
{
if (rr->request_id == rm->request_id)
break;
}
}
- GNUNET_CLIENT_receive (vh->client,
- &receive_response, vh,
- GNUNET_TIME_UNIT_FOREVER_REL);
}
rr = rr->next;
if (NULL == rr)
return 0;
+ if (0 == size)
+ {
+ reconnect (vh);
+ return 0;
+ }
/* if first request, start receive loop */
if (0 == vh->request_id_gen)
GNUNET_CLIENT_receive (vh->client,
&receive_response, vh,
- GNUNET_TIME_UNIT_FOREVER_REL);
+ GNUNET_TIME_UNIT_FOREVER_REL);
if (NULL == rr->addr)
{
ret = sizeof (struct RedirectToServiceRequestMessage);
+ GNUNET_assert (ret <= size);
rs.header.size = htons ((uint16_t) ret);
rs.header.type = htons (GNUNET_MESSAGE_TYPE_VPN_CLIENT_REDIRECT_TO_SERVICE);
- rs.nac = htonl (rr->nac);
+ rs.reserved = htonl (0);
rs.expiration_time = GNUNET_TIME_absolute_hton (rr->expiration_time);
rs.protocol = htonl (rr->protocol);
rs.result_af = htonl (rr->result_af);
rs.target = rr->peer;
rs.service_descriptor = rr->serv;
- rs.request_id = rr->request_id = ++vh->request_id_gen;
+ rs.request_id = rr->request_id = ++vh->request_id_gen;
memcpy (buf, &rs, sizeof (struct RedirectToServiceRequestMessage));
}
else
return 0;
}
ret = alen + sizeof (struct RedirectToIpRequestMessage);
+ GNUNET_assert (ret <= size);
rip.header.size = htons ((uint16_t) ret);
rip.header.type = htons (GNUNET_MESSAGE_TYPE_VPN_CLIENT_REDIRECT_TO_IP);
- rip.nac = htonl (rr->nac);
+ rip.reserved = htonl (0);
rip.expiration_time = GNUNET_TIME_absolute_hton (rr->expiration_time);
rip.result_af = htonl (rr->result_af);
rip.addr_af = htonl (rr->addr_af);
/**
* Add a request to our request queue and transmit it.
- *
+ *
* @param rr request to queue and transmit.
*/
static void
/**
* Connect to the VPN service and start again to transmit our requests.
*
- * @param cls the 'struct GNUNET_VPN_Handle *'
- * @param tc scheduler context
+ * @param cls the `struct GNUNET_VPN_Handle *`
*/
static void
-connect_task (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+connect_task (void *cls)
{
struct GNUNET_VPN_Handle *vh = cls;
-
+
+ vh->rt = NULL;
vh->client = GNUNET_CLIENT_connect ("vpn", vh->cfg);
GNUNET_assert (NULL != vh->client);
- GNUNET_assert (NULL != vh->th);
- if (NULL != vh->rr_head)
+ GNUNET_assert (NULL == vh->th);
+ if (NULL != vh->rr_head)
vh->th = GNUNET_CLIENT_notify_transmit_ready (vh->client,
sizeof (struct RedirectToServiceRequestMessage),
GNUNET_TIME_UNIT_FOREVER_REL,
{
GNUNET_CLIENT_notify_transmit_ready_cancel (vh->th);
vh->th = NULL;
- }
- GNUNET_CLIENT_disconnect (vh->client, GNUNET_NO);
+ }
+ GNUNET_CLIENT_disconnect (vh->client);
vh->client = NULL;
vh->request_id_gen = 0;
for (rr = vh->rr_head; NULL != rr; rr = rr->next)
rr->request_id = 0;
- vh->rt = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_SECONDS,
- &connect_task,
+ vh->backoff = GNUNET_TIME_relative_max (GNUNET_TIME_UNIT_MILLISECONDS,
+ GNUNET_TIME_relative_min (GNUNET_TIME_relative_multiply (vh->backoff, 2),
+ GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 30)));
+ vh->rt = GNUNET_SCHEDULER_add_delayed (vh->backoff,
+ &connect_task,
vh);
}
* @param protocol protocol, IPPROTO_UDP or IPPROTO_TCP
* @param peer target peer for the redirection
* @param serv service descriptor to give to the peer
- * @param nac GNUNET_YES to notify via callback only after completion of
- * the MESH-level connection,
- * GNUNET_NO to notify as soon as the IP has been reserved
* @param expiration_time at what time should the redirection expire?
* (this should not impact connections that are active at that time)
* @param cb function to call with the IP
int result_af,
uint8_t protocol,
const struct GNUNET_PeerIdentity *peer,
- const GNUNET_HashCode *serv,
- int nac,
+ const struct GNUNET_HashCode *serv,
struct GNUNET_TIME_Absolute expiration_time,
GNUNET_VPN_AllocationCallback cb,
void *cb_cls)
{
struct GNUNET_VPN_RedirectionRequest *rr;
- rr = GNUNET_malloc (sizeof (struct GNUNET_VPN_RedirectionRequest));
+ rr = GNUNET_new (struct GNUNET_VPN_RedirectionRequest);
rr->vh = vh;
rr->cb = cb;
rr->cb_cls = cb_cls;
rr->serv = *serv;
rr->expiration_time = expiration_time;
rr->result_af = result_af;
- rr->nac = nac;
rr->protocol = protocol;
queue_request (rr);
return rr;
}
-
+
/**
* Tell the VPN that forwarding to the Internet via some exit node is
* requested. Note that both UDP and TCP traffic will be forwarded,
* @param addr_af address family for 'addr', AF_INET or AF_INET6
* @param addr destination IP address on the Internet; destination
* port is to be taken from the VPN packet itself
- * @param nac GNUNET_YES to notify via callback only after completion of
- * the MESH-level connection,
- * GNUNET_NO to notify as soon as the IP has been reserved
* @param expiration_time at what time should the redirection expire?
* (this should not impact connections that are active at that time)
* @param cb function to call with the IP
int result_af,
int addr_af,
const void *addr,
- int nac,
struct GNUNET_TIME_Absolute expiration_time,
GNUNET_VPN_AllocationCallback cb,
void *cb_cls)
rr->expiration_time = expiration_time;
rr->result_af = result_af;
rr->addr_af = addr_af;
- rr->nac = nac;
memcpy (&rr[1], addr, alen);
queue_request (rr);
return rr;
* Connect to the VPN service
*
* @param cfg configuration to use
- * @return VPN handle
+ * @return VPN handle
*/
struct GNUNET_VPN_Handle *
GNUNET_VPN_connect (const struct GNUNET_CONFIGURATION_Handle *cfg)
{
struct GNUNET_VPN_Handle *vh;
- vh = GNUNET_malloc (sizeof (struct GNUNET_VPN_Handle));
+ vh = GNUNET_new (struct GNUNET_VPN_Handle);
vh->cfg = cfg;
vh->client = GNUNET_CLIENT_connect ("vpn", cfg);
if (NULL == vh->client)
}
if (NULL != vh->client)
{
- GNUNET_CLIENT_disconnect (vh->client, GNUNET_NO);
+ GNUNET_CLIENT_disconnect (vh->client);
vh->client = NULL;
}
- if (GNUNET_SCHEDULER_NO_TASK != vh->rt)
+ if (NULL != vh->rt)
{
GNUNET_SCHEDULER_cancel (vh->rt);
- vh->rt = GNUNET_SCHEDULER_NO_TASK;
+ vh->rt = NULL;
}
GNUNET_free (vh);
}