39 #define LOG(level, ...) GNUNET_log_from (level, "cadet-con", __VA_ARGS__) 46 #define INITIAL_CONNECTION_CREATE_RETRY_DELAY \ 47 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 200) 210 "Trying to update connection state for %s having old state %d to new %d and mqm_ready old %d to mqm_ready new %d\n",
223 cc->
state = new_state;
227 "Updating connection state for %s having old_ready %d and new_rady %d\n",
232 if (old_ready != new_ready)
252 if (NULL != cc->
task)
263 for (
unsigned int i = 0; i < cc->
off; i++)
269 ->connection_of_tunnel,
314 destroy_msg->
cid = cc->
cid;
403 "Sending KEEPALIVE on behalf of %s via %s\n",
407 msg.
size = htons (
sizeof(msg));
482 result /= (weight + 1.0);
498 "Received CADET_CONNECTION_CREATE_ACK for %s in state %d (%s)\n",
504 if (NULL != cc->
task)
529 "Received KX message with ephermal %s on CC %s in state %d\n",
538 "Faking connection CADET_CONNECTION_CREATE_ACK for %s due to KX\n",
557 "Received KX AUTH message with ephermal %s on CC %s in state %d\n",
566 "Faking connection CADET_CONNECTION_CREATE_ACK for %s due to KX\n",
589 "Faking connection ACK for %s due to ENCRYPTED payload\n",
609 .purpose.size = htonl (
sizeof(cp)),
641 create_msg->
cid = cc->
cid;
656 for (
unsigned int i = 0; i <= cc->
off; i++)
659 "Sending CADET_CONNECTION_CREATE message for %s with %u hops\n",
684 "Sending CONNECTION_CREATE_ACK message for %s\n",
715 "Got duplicate CREATE for %s, scheduling another ACK (%s)\n",
721 if (NULL != cc->
task)
732 "Got duplicate CREATE for %s. MQ is busy, not queueing another ACK\n",
759 if (NULL != cc->
task)
769 "Core MQ for %s became available in state %d\n",
801 "Scheduling keepalive for %s in %s\n",
841 cc->
state = init_state;
858 "Creating %s using path %s (offset: %u)\n",
863 for (
unsigned int i = 0; i <
off; i++)
918 "Got two connections on %s, dropping my existing %s\n",
928 "Got two connections on %s, keeping my existing %s\n",
994 "Scheduling message for transmission on %s\n",
1000 if (NULL != cc->
task)
1045 static char buf[128];
1048 return "Connection(NULL)";
1054 "Connection %s (%s)",
1067 #define LOG2(level, ...) \ 1068 GNUNET_log_from_nocheck (level, "cadet-con", __VA_ARGS__) 1080 #if ! defined(GNUNET_CULL_LOGGING) 1092 LOG2 (level,
"Connection (NULL)\n");
1096 "%s to %s via path %s in state %d is %s\n",
int mqm_ready
Are we ready to transmit via mq_man right now?
Axolotl-encrypted tunnel message with application payload.
struct GNUNET_TIME_AbsoluteNBO monotime
This monotonic time is set, if a peer likes to trigger a KX, but is not the peer that should start th...
#define INITIAL_CONNECTION_CREATE_RETRY_DELAY
How long do we wait initially before retransmitting the KX? TODO: replace by 2 RTT if/once we have co...
void GCT_connection_lost(struct CadetTConnection *ct)
We lost a connection, remove it from our list and clean up the connection object itself.
int GCT_alice_or_betty(const struct GNUNET_PeerIdentity *other)
Am I Alice or Betty (some call her Bob), or talking to myself?
struct GNUNET_TIME_Absolute create_ack_at
Earliest time for re-trying CREATE_ACK.
const char * GNUNET_sh2s(const struct GNUNET_ShortHashCode *shc)
Convert a short hash value to a string (for printing debug messages).
const struct CadetConnectionMetrics * GCC_get_metrics(struct CadetConnection *cc)
Obtain performance metrics from cc.
struct GNUNET_MessageHeader * msg
struct GNUNET_SCHEDULER_Task * task
Task for connection maintenance.
GNUnet CADET service with encryption.
Low-level connection to a destination.
static const struct GNUNET_CONFIGURATION_Handle * cfg
Configuration we are using.
uint64_t rel_value_us
The actual value.
#define GNUNET_CRYPTO_eddsa_sign(priv, ps, sig)
EdDSA sign a given block.
static void send_keepalive(void *cls)
Send a GNUNET_MESSAGE_TYPE_CADET_CHANNEL_KEEPALIVE through the tunnel to prevent it from timing out...
Message to destroy a connection.
enum CadetTunnelEState GCT_get_estate(struct CadetTunnel *t)
Get the encryption state of a tunnel.
struct CadetTunnel * GCP_get_tunnel(struct CadetPeer *cp, int create)
Get the tunnel towards a peer.
uint32_t purpose
What does this signature vouch for? This must contain a GNUNET_SIGNATURE_PURPOSE_XXX constant (from g...
A connection is a live end-to-end messaging mechanism where the peers are identified by a path and kn...
static void send_create_ack(void *cls)
Send a CREATE_ACK message towards the origin.
const char * GCT_2s(const struct CadetTunnel *t)
Get the static string for the peer this tunnel is directed.
unsigned long long num_successes
Number of packets that were sent via this connection did actually receive an ACK? (Note: ACKs may be ...
void GCT_handle_encrypted(struct CadetTConnection *ct, const struct GNUNET_CADET_TunnelEncryptedMessage *msg)
Handle encrypted message.
const char * GCC_2s(const struct CadetConnection *cc)
Get a (static) string for a connection.
CadetConnectionState
All the states a connection can be in.
Data structure used to track whom we have to notify about changes to our message queue.
struct GNUNET_TIME_Absolute last_use
When was this connection last used? (by us sending or receiving a PAYLOAD message on it) ...
struct GNUNET_CADET_TunnelKeyExchangeMessage kx
Message header with key material.
struct GNUNET_PeerIdentity my_full_id
Local peer own ID.
static void update_state(struct CadetConnection *cc, enum CadetConnectionState new_state, int new_mqm_ready)
Update the connection state.
struct GNUNET_TIME_Absolute GNUNET_TIME_relative_to_absolute(struct GNUNET_TIME_Relative rel)
Convert relative time to an absolute time in the future.
void GCC_destroy_without_core(struct CadetConnection *cc)
Destroy a connection, called when the CORE layer is already done (i.e.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
Message for ack'ing a connection.
struct GNUNET_CRYPTO_EccSignaturePurpose purpose
Purpose is GNUNET_SIGNATURE_PURPOSE_CADET_CONNECTION_INITIATOR.
void GCT_send_cancel(struct CadetTunnelQueueEntry *tq)
Cancel a previously sent message while it's in the queue.
const struct GNUNET_CADET_ConnectionTunnelIdentifier * GCC_get_id(struct CadetConnection *cc)
Obtain unique ID for the connection.
struct CadetPeerPath * path
Path we are using to our destination.
We are an inbound connection, and received a CREATE.
void set_monotime_sig(struct GNUNET_CADET_ConnectionCreateMessage *msg)
Set the signature for a monotime value on a GNUNET_CADET_ConnectionCreateMessage. ...
struct GNUNET_CADET_ConnectionTunnelIdentifier cid
ID of the connection.
void GCC_handle_kx(struct CadetConnection *cc, const struct GNUNET_CADET_TunnelKeyExchangeMessage *msg)
Handle KX message.
struct CadetPeer * destination
To which peer does this connection go?
int GNUNET_CONTAINER_multishortmap_remove(struct GNUNET_CONTAINER_MultiShortmap *map, const struct GNUNET_ShortHashCode *key, const void *value)
Remove the given key-value pair from the map.
static struct CadetConnection * connection_create(struct CadetPeer *destination, struct CadetPeerPath *path, unsigned int off, struct CadetTConnection *ct, const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid, enum CadetConnectionState init_state, GCC_ReadyCallback ready_cb, void *ready_cb_cls)
Create a connection to destination via path and notify cb whenever we are ready for more data...
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
struct CadetTunnelQueueEntry * GCT_send(struct CadetTunnel *t, const struct GNUNET_MessageHeader *message, GCT_SendContinuation cont, void *cont_cls, struct GNUNET_CADET_ChannelTunnelNumber *ctn)
Sends an already built message on a tunnel, encrypting it and choosing the best connection if not pro...
void GCC_handle_connection_create_ack(struct CadetConnection *cc)
A GNUNET_MESSAGE_TYPE_CADET_CONNECTION_CREATE_ACK was received for this connection, implying that the end-to-end connection is up.
static void send_create(void *cls)
Send a GNUNET_MESSAGE_TYPE_CADET_CONNECTION_CREATE message to the first hop.
static void GCC_destroy(struct CadetConnection *cc)
Destroy a connection, part of the internal implementation.
Information we track per tunnel.
GNUNET_ErrorType
Types of errors.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
void GCP_send(struct GCP_MessageQueueManager *mqm, struct GNUNET_MQ_Envelope *env)
Send the message in env to cp.
struct CadetConnection * GCC_create(struct CadetPeer *destination, struct CadetPeerPath *path, unsigned int off, struct CadetTConnection *ct, GCC_ReadyCallback ready_cb, void *ready_cb_cls)
Create a connection to destination via path and notify cb whenever we are ready for more data...
struct GNUNET_TIME_Absolute create_at
Earliest time for re-trying CREATE.
static struct GNUNET_SCHEDULER_Task * t
Main task.
GCC_ReadyCallback ready_cb
Function to call once we are ready to transmit.
struct CadetConnection * GCC_create_inbound(struct CadetPeer *destination, struct CadetPeerPath *path, struct CadetTConnection *ct, const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid, GCC_ReadyCallback ready_cb, void *ready_cb_cls)
Create a connection to destination via path and notify cb whenever we are ready for more data...
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
struct GNUNET_CONTAINER_MultiShortmap * connections
Map from struct GNUNET_CADET_ConnectionTunnelIdentifier hash codes to struct CadetConnection objects...
void GCC_debug(struct CadetConnection *cc, enum GNUNET_ErrorType level)
Log connection info.
const char * GCP_2s(const struct CadetPeer *cp)
Get the static string for a peer ID.
int GNUNET_snprintf(char *buf, size_t size, const char *format,...) __attribute__((format(printf
Like snprintf, just aborts if the buffer is of insufficient size.
struct CadetTunnel * t
Tunnel this connection belongs to.
unsigned int latency_datapoints
How many latency observations did we make for this connection?
const char * GCPP_2s(struct CadetPeerPath *path)
Convert a path to a human-readable string.
Performance metrics for a connection.
#define GNUNET_MQ_msg_extra(mvar, esize, type)
Allocate an envelope, with extra space allocated after the space needed by the message struct...
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed(struct GNUNET_TIME_Relative delay, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
void GCP_remove_connection(struct CadetPeer *cp, struct CadetConnection *cc)
Remove a connection that went via this cp.
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
struct GNUNET_STATISTICS_Handle * stats
Handle to the statistics service.
Message for a Key eXchange for a tunnel, with authentication.
Purpose for the signature of a monotime.
Connection create message in queue, awaiting transmission by CORE.
void GCC_latency_observed(const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid, struct GNUNET_TIME_Relative latency)
We observed some the given latency on the connection identified by cti.
const char * GNUNET_STRINGS_relative_time_to_string(struct GNUNET_TIME_Relative delta, int do_round)
Give relative time in human-readable fancy format.
struct GNUNET_TIME_Relative retry_delay
How long do we wait before we try again with a CREATE message?
Connection confirmed, ready to carry traffic.
struct GNUNET_MQ_Envelope * env
Pending message, NULL if we are ready to transmit.
static void keepalive_done(void *cls, const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid)
Keepalive was transmitted.
int GNUNET_CONTAINER_multishortmap_put(struct GNUNET_CONTAINER_MultiShortmap *map, const struct GNUNET_ShortHashCode *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
struct GNUNET_TIME_Relative aged_latency
Our current best estimate of the latency, based on a weighted average of at least latency_datapoints ...
#define GNUNET_MESSAGE_TYPE_CADET_CONNECTION_CREATE
Request the creation of a connection.
static int result
Global testing status.
struct GNUNET_TIME_Relative GNUNET_TIME_relative_multiply(struct GNUNET_TIME_Relative rel, unsigned long long factor)
Multiply relative time by a given factor.
struct CadetTConnection * ct
Which tunnel is using this connection?
void GCC_destroy_without_tunnel(struct CadetConnection *cc)
Destroy a connection, called if the tunnel association with the connection was already broken...
struct GNUNET_CADET_ConnectionTunnelIdentifier cid
ID of the connection.
#define GNUNET_MESSAGE_TYPE_CADET_CONNECTION_CREATE_ACK
Send origin an ACK that the connection is complete.
#define GNUNET_MESSAGE_TYPE_CADET_CHANNEL_KEEPALIVE
Announce connection is still alive (direction sensitive).
struct CadetTConnection * GCC_get_ct(struct CadetConnection *cc)
Return the tunnel associated with this connection.
void GCT_handle_kx(struct CadetTConnection *ct, const struct GNUNET_CADET_TunnelKeyExchangeMessage *msg)
Handle KX message that lacks authentication (and which will thus only be considered authenticated aft...
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_get(void)
Get the current time.
void GCP_add_connection(struct CadetPeer *cp, struct CadetConnection *cc)
Add a connection to this cp.
struct CadetConnection * cc
Connection handle.
int has_monotime
This flag indicates the peer sending the connection create meassage likes to trigger a KX handshake...
void GCC_handle_duplicate_create(struct CadetConnection *cc)
We got a GNUNET_MESSAGE_TYPE_CADET_CONNECTION_CREATE for a connection that we already have...
Struct containing all information regarding a tunnel to a peer.
There must only be one value per key; storing a value should fail if a value under the same key alrea...
int GNUNET_get_log_call_status(int caller_level, const char *comp, const char *file, const char *function, int line)
Decides whether a particular logging call should or should not be allowed to be made.
struct CadetConnectionMetrics metrics
Performance metrics for this connection.
struct GCP_MessageQueueManager * mq_man
Handle for calling GCP_request_mq_cancel() once we are finished.
Struct used to save messages in a non-ready tunnel to send once connected.
#define GNUNET_TIME_STD_BACKOFF(r)
Perform our standard exponential back-off calculation, starting at 1 ms and then going by a factor of...
Connection create message sent, waiting for ACK.
Handshake completed: session key available.
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_get_monotonic(const struct GNUNET_CONFIGURATION_Handle *cfg)
Obtain the current time and make sure it is monotonically increasing.
struct CadetPeerPath * GCC_get_path(struct CadetConnection *cc, unsigned int *off)
Obtain the path used by this connection.
#define GNUNET_memcmp(a, b)
Compare memory in a and b, where both must be of the same pointer type.
P2P messages used by CADET.
unsigned int GCPP_find_peer(struct CadetPeerPath *path, struct CadetPeer *cp)
Find peer's offset on path.
void(* GCC_ReadyCallback)(void *cls, int is_ready)
Function called to notify tunnel about change in our readyness.
struct CadetTunnelQueueEntry * keepalive_qe
Queue entry for keepalive messages.
struct GNUNET_CRYPTO_EddsaPrivateKey * my_private_key
Own private key.
void GCT_handle_kx_auth(struct CadetTConnection *ct, const struct GNUNET_CADET_TunnelKeyExchangeAuthMessage *msg)
Handle KX_AUTH message.
struct CadetConnection * GCC_lookup(const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid)
Lookup a connection by its identifier.
void GCC_transmit(struct CadetConnection *cc, struct GNUNET_MQ_Envelope *env)
Transmit message msg via connection cc.
static void manage_first_hop_mq(void *cls, int available)
There has been a change in the message queue existence for our peer at the first hop.
Entry in list of connections used by tunnel, with metadata.
The identity of the host (wraps the signing key of the peer).
void * ready_cb_cls
Closure for ready_cb.
enum CadetConnectionState state
State of the connection.
Hash uniquely identifying a connection below a tunnel.
void * GNUNET_CONTAINER_multishortmap_get(const struct GNUNET_CONTAINER_MultiShortmap *map, const struct GNUNET_ShortHashCode *key)
Given a key find a value in the map matching the key.
void GCC_handle_encrypted(struct CadetConnection *cc, const struct GNUNET_CADET_TunnelEncryptedMessage *msg)
Handle encrypted message.
void GCPP_del_connection(struct CadetPeerPath *path, unsigned int off, struct CadetConnection *cc)
Notify path that it is no longer used for connection cc which ended at the path's offset off...
#define GNUNET_MESSAGE_TYPE_CADET_CONNECTION_DESTROY
Request the destruction of a connection.
void GCP_request_mq_cancel(struct GCP_MessageQueueManager *mqm, struct GNUNET_MQ_Envelope *last_env)
Stops message queue change notifications.
Message for a Key eXchange for a tunnel.
struct CadetConnection * GCPP_get_connection(struct CadetPeerPath *path, struct CadetPeer *destination, unsigned int off)
Return connection to destination using path, or return NULL if no such connection exists...
Entry in list of pending tasks.
unsigned long long num_acked_transmissions
How many packets that ought to generate an ACK did we send via this connection?
struct CadetPeer * GCPP_get_peer_at_offset(struct CadetPeerPath *path, unsigned int off)
Obtain the peer at offset off in path.
void GNUNET_CRYPTO_random_block(enum GNUNET_CRYPTO_Quality mode, void *buffer, size_t length)
Fill block with a random values.
struct GNUNET_TIME_Relative keepalive_period
How frequently do we send KEEPALIVE messages on idle connections?
Uninitialized status, we need to send KX.
void GCC_ack_observed(const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid)
We observed an ACK for a message that was originally sent via the connection identified by cti...
void GCC_ack_expected(const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid)
We sent a message for which we expect to receive an ACK via the connection identified by cti...
void GCC_handle_kx_auth(struct CadetConnection *cc, const struct GNUNET_CADET_TunnelKeyExchangeAuthMessage *msg)
Handle KX_AUTH message.
Time for absolute times used by GNUnet, in microseconds.
Uninitialized status, we have not yet even gotten the message queue.
uint32_t options
Connection options in network byte order.
struct GNUNET_CRYPTO_EddsaSignature monotime_sig
We sign the monotime.
struct GNUNET_CRYPTO_EcdhePublicKey ephemeral_key
Sender's ephemeral public ECC key encoded in a format suitable for network transmission, as created using 'gcry_sexp_sprint'.
const char * GNUNET_e2s(const struct GNUNET_CRYPTO_EcdhePublicKey *p)
Convert a public key value to a string (for printing debug messages).
struct GNUNET_TIME_Absolute age
When was this connection first established? (by us sending or receiving the CREATE_ACK for the first ...
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_at(struct GNUNET_TIME_Absolute at, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run at the specified time.
Information regarding a possible path to reach a peer.
struct GNUNET_ShortHashCode connection_of_tunnel
struct GNUNET_CADET_ConnectionTunnelIdentifier cid
ID of the connection.
void GCPP_add_connection(struct CadetPeerPath *path, unsigned int off, struct CadetConnection *cc)
Notify path that it is used for connection cc which ends at the path's offset off.
struct GNUNET_TIME_AbsoluteNBO GNUNET_TIME_absolute_hton(struct GNUNET_TIME_Absolute a)
Convert absolute time to network byte order.
struct GNUNET_CADET_ConnectionTunnelIdentifier cid
ID of the connection.
Message for cadet connection creation.
#define GNUNET_SIGNATURE_PURPOSE_CADET_CONNECTION_INITIATOR
Signature by a peer that like to create a connection.
#define GNUNET_free(ptr)
Wrapper around free.
const struct GNUNET_PeerIdentity * GCP_get_id(struct CadetPeer *cp)
Obtain the peer identity for a struct CadetPeer.
Time for relative time used by GNUnet, in microseconds.
struct GCP_MessageQueueManager * GCP_request_mq(struct CadetPeer *cp, GCP_MessageQueueNotificationCallback cb, void *cb_cls)
Start message queue change notifications.
unsigned int off
Offset of our destination in path.
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.