GNUnet  0.11.x
Data Structures | Functions
gnunet-service-messenger_tunnel.c File Reference

GNUnet MESSENGER service. More...

#include "gnunet-service-messenger_tunnel.h"
#include "gnunet-service-messenger_handle.h"
#include "gnunet-service-messenger_message_recv.h"
#include "gnunet-service-messenger_message_store.h"
#include "gnunet-service-messenger_operation_store.h"
#include "gnunet-service-messenger_operation.h"
#include "messenger_api_util.h"
Include dependency graph for gnunet-service-messenger_tunnel.c:

Go to the source code of this file.

Data Structures

struct  GNUNET_MESSENGER_MessageSent
 

Functions

struct GNUNET_MESSENGER_SrvTunnelcreate_tunnel (struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_PeerIdentity *door)
 Creates and allocates a tunnel of a room to a specific peer identity (called door). More...
 
void destroy_tunnel (struct GNUNET_MESSENGER_SrvTunnel *tunnel)
 Destroys a tunnel and frees its memory fully. More...
 
void bind_tunnel (struct GNUNET_MESSENGER_SrvTunnel *tunnel, struct GNUNET_CADET_Channel *channel)
 Binds a CADET channel to a tunnel and replaces its channel the tunnel is currently bound to if necessary. More...
 
void callback_room_disconnect (struct GNUNET_MESSENGER_SrvRoom *room, void *cls)
 
void callback_tunnel_disconnect (void *cls, const struct GNUNET_CADET_Channel *channel)
 
int callback_verify_room_message (struct GNUNET_MESSENGER_SrvRoom *room, void *cls, struct GNUNET_MESSENGER_Message *message, struct GNUNET_HashCode *hash)
 
int check_tunnel_message (void *cls, const struct GNUNET_MessageHeader *header)
 
int update_room_message (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
 
void callback_room_handle_message (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
 
static void update_tunnel_last_message (struct GNUNET_MESSENGER_SrvTunnel *tunnel, const struct GNUNET_HashCode *hash)
 
void handle_tunnel_message (void *cls, const struct GNUNET_MessageHeader *header)
 
int connect_tunnel (struct GNUNET_MESSENGER_SrvTunnel *tunnel)
 Tries to connect a tunnel by creating a new CADET channel and binding it. More...
 
void disconnect_tunnel (struct GNUNET_MESSENGER_SrvTunnel *tunnel)
 Disconnects and unbinds a channel from a tunnel. More...
 
int is_tunnel_connected (const struct GNUNET_MESSENGER_SrvTunnel *tunnel)
 Returns the status of a currently bound channel of a tunnel. More...
 
static void callback_tunnel_sent (void *cls)
 
void send_tunnel_envelope (struct GNUNET_MESSENGER_SrvTunnel *tunnel, struct GNUNET_MQ_Envelope *env, const struct GNUNET_HashCode *hash)
 Sends an envelope containing a message with a given hash through a tunnel. More...
 
int send_tunnel_message (struct GNUNET_MESSENGER_SrvTunnel *tunnel, void *handle, struct GNUNET_MESSENGER_Message *message)
 Sends a message by packing it automatically into an envelope and passing it through the tunnel. More...
 
void forward_tunnel_message (struct GNUNET_MESSENGER_SrvTunnel *tunnel, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
 Forwards a given message with a known hash through a tunnel. More...
 
const struct GNUNET_HashCodeget_tunnel_peer_message (const struct GNUNET_MESSENGER_SrvTunnel *tunnel)
 Returns the hash of the latest peer message published through a given tunnel and matching the tunnels peer identity. More...
 
void get_tunnel_peer_identity (const struct GNUNET_MESSENGER_SrvTunnel *tunnel, struct GNUNET_PeerIdentity *peer)
 Writes the peer identity of the peer connected via tunnel to this peer into the peer parameter. More...
 
uint32_t get_tunnel_messenger_version (const struct GNUNET_MESSENGER_SrvTunnel *tunnel)
 Returns the current messenger version the peer connected via a given tunnel has reported to be using if it was compatible during updating. More...
 
int update_tunnel_messenger_version (struct GNUNET_MESSENGER_SrvTunnel *tunnel, uint32_t version)
 Updates the messenger version of the tunnel to a given version if it is compatible to the running peer of the service. More...
 

Detailed Description

GNUnet MESSENGER service.

Author
Tobias Frisch

Definition in file gnunet-service-messenger_tunnel.c.

Function Documentation

◆ create_tunnel()

struct GNUNET_MESSENGER_SrvTunnel* create_tunnel ( struct GNUNET_MESSENGER_SrvRoom room,
const struct GNUNET_PeerIdentity door 
)

Creates and allocates a tunnel of a room to a specific peer identity (called door).

Parameters

Definition at line 36 of file gnunet-service-messenger_tunnel.c.

References GNUNET_MESSENGER_SrvTunnel::channel, GNUNET_assert, GNUNET_new, GNUNET_PEER_intern(), init_message_state(), GNUNET_MESSENGER_SrvTunnel::messenger_version, GNUNET_MESSENGER_SrvTunnel::peer, GNUNET_MESSENGER_SrvTunnel::peer_message, GNUNET_MESSENGER_SrvTunnel::room, and GNUNET_MESSENGER_SrvTunnel::state.

Referenced by callback_room_connect(), and enter_room_at().

37 {
38  GNUNET_assert((room) && (door));
39 
41 
42  tunnel->room = room;
43  tunnel->channel = NULL;
44 
45  tunnel->peer = GNUNET_PEER_intern (door);
46 
47  tunnel->messenger_version = 0;
48 
49  tunnel->peer_message = NULL;
50 
51  init_message_state(&(tunnel->state));
52 
53  return tunnel;
54 }
void init_message_state(struct GNUNET_MESSENGER_MessageState *state)
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
struct GNUNET_MESSENGER_SrvRoom * room
struct GNUNET_CADET_Channel * channel
struct GNUNET_MESSENGER_MessageState state
GNUNET_PEER_Id GNUNET_PEER_intern(const struct GNUNET_PeerIdentity *pid)
Intern an peer identity.
Definition: peer.c:107
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◆ destroy_tunnel()

void destroy_tunnel ( struct GNUNET_MESSENGER_SrvTunnel tunnel)

Destroys a tunnel and frees its memory fully.

Parameters

Definition at line 57 of file gnunet-service-messenger_tunnel.c.

References GNUNET_MESSENGER_SrvTunnel::channel, clear_message_state(), GNUNET_assert, GNUNET_CADET_channel_destroy(), GNUNET_free, GNUNET_PEER_change_rc(), GNUNET_MESSENGER_SrvTunnel::peer, GNUNET_MESSENGER_SrvTunnel::peer_message, and GNUNET_MESSENGER_SrvTunnel::state.

58 {
59  GNUNET_assert(tunnel);
60 
61  if (tunnel->channel)
63 
64  GNUNET_PEER_change_rc (tunnel->peer, -1);
65 
66  if (tunnel->peer_message)
67  GNUNET_free(tunnel->peer_message);
68 
69  clear_message_state(&(tunnel->state));
70 
71  GNUNET_free(tunnel);
72 }
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
void clear_message_state(struct GNUNET_MESSENGER_MessageState *state)
struct GNUNET_CADET_Channel * channel
struct GNUNET_MESSENGER_MessageState state
void GNUNET_PEER_change_rc(GNUNET_PEER_Id id, int delta)
Change the reference counter of an interned PID.
Definition: peer.c:197
void GNUNET_CADET_channel_destroy(struct GNUNET_CADET_Channel *channel)
Destroy an existing channel.
Definition: cadet_api.c:837
#define GNUNET_free(ptr)
Wrapper around free.
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◆ bind_tunnel()

void bind_tunnel ( struct GNUNET_MESSENGER_SrvTunnel tunnel,
struct GNUNET_CADET_Channel channel 
)

Binds a CADET channel to a tunnel and replaces its channel the tunnel is currently bound to if necessary.

Parameters

Definition at line 75 of file gnunet-service-messenger_tunnel.c.

References callback_room_disconnect(), GNUNET_MESSENGER_SrvTunnel::channel, delayed_disconnect_channel(), GNUNET_assert, and GNUNET_MESSENGER_SrvTunnel::room.

Referenced by callback_room_connect().

76 {
77  GNUNET_assert(tunnel);
78 
79  if (tunnel->channel)
81 
82  tunnel->channel = channel;
83 }
void delayed_disconnect_channel(struct GNUNET_CADET_Channel *channel)
Starts an urgent task to close a CADET channel asynchronously.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
struct GNUNET_CADET_Channel * channel
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◆ callback_room_disconnect()

void callback_room_disconnect ( struct GNUNET_MESSENGER_SrvRoom room,
void *  cls 
)

Definition at line 750 of file gnunet-service-messenger_room.c.

References GNUNET_MESSENGER_SrvRoom::basement, contains_list_tunnels(), create_message_miss(), get_tunnel_peer_identity(), GNUNET_CONTAINER_multipeermap_contains(), GNUNET_CONTAINER_multipeermap_remove(), GNUNET_YES, GNUNET_MESSENGER_SrvRoom::host, send_room_message(), and GNUNET_MESSENGER_SrvRoom::tunnels.

Referenced by bind_tunnel(), and callback_tunnel_disconnect().

751 {
752  struct GNUNET_MESSENGER_SrvTunnel *tunnel = cls;
753 
754  if (!room->host)
755  return;
756 
759 
762  return;
763 
766 }
int contains_list_tunnels(struct GNUNET_MESSENGER_ListTunnels *tunnels, const struct GNUNET_PeerIdentity *peer)
Tests linearly if the list of tunnels peer identities contains a specific peer identity and returns G...
int GNUNET_CONTAINER_multipeermap_remove(struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key, const void *value)
Remove the given key-value pair from the map.
int send_room_message(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle, struct GNUNET_MESSENGER_Message *message)
Sends a message from a given handle into a room.
void get_tunnel_peer_identity(const struct GNUNET_MESSENGER_SrvTunnel *tunnel, struct GNUNET_PeerIdentity *peer)
Writes the peer identity of the peer connected via tunnel to this peer into the peer parameter...
static struct GNUNET_IDENTITY_Handle * identity
Which namespace do we publish to? NULL if we do not publish to a namespace.
struct GNUNET_MESSENGER_SrvHandle * host
struct GNUNET_MESSENGER_Message * create_message_miss(const struct GNUNET_PeerIdentity *peer)
Creates and allocates a new miss message containing the missing peer identity.
The identity of the host (wraps the signing key of the peer).
struct GNUNET_MESSENGER_ListTunnels basement
struct GNUNET_CONTAINER_MultiPeerMap * tunnels
int GNUNET_CONTAINER_multipeermap_contains(const struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key)
Check if the map contains any value under the given key (including values that are NULL)...
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◆ callback_tunnel_disconnect()

void callback_tunnel_disconnect ( void *  cls,
const struct GNUNET_CADET_Channel channel 
)

Definition at line 89 of file gnunet-service-messenger_tunnel.c.

References callback_room_disconnect(), callback_verify_room_message(), GNUNET_MESSENGER_SrvTunnel::channel, and GNUNET_MESSENGER_SrvTunnel::room.

Referenced by connect_tunnel(), join_room_locally(), and open_room().

90 {
91  struct GNUNET_MESSENGER_SrvTunnel *tunnel = cls;
92 
93  if (tunnel)
94  {
95  tunnel->channel = NULL;
96 
97  callback_room_disconnect (tunnel->room, cls);
98  }
99 }
struct GNUNET_MESSENGER_SrvRoom * room
void callback_room_disconnect(struct GNUNET_MESSENGER_SrvRoom *room, void *cls)
struct GNUNET_CADET_Channel * channel
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◆ callback_verify_room_message()

int callback_verify_room_message ( struct GNUNET_MESSENGER_SrvRoom room,
void *  cls,
struct GNUNET_MESSENGER_Message message,
struct GNUNET_HashCode hash 
)

Definition at line 769 of file gnunet-service-messenger_room.c.

References get_room_message_store(), get_store_message(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_log, GNUNET_MESSENGER_KIND_UNKNOWN, GNUNET_MESSENGER_name_of_kind(), GNUNET_OK, GNUNET_SYSERR, GNUNET_TIME_absolute_get_difference(), GNUNET_TIME_absolute_ntoh(), GNUNET_TIME_relative_get_zero_(), GNUNET_MESSENGER_Message::header, GNUNET_MESSENGER_MessageHeader::kind, GNUNET_MESSENGER_MessageHeader::previous, and GNUNET_MESSENGER_MessageHeader::timestamp.

Referenced by callback_tunnel_disconnect(), and check_tunnel_message().

771 {
772  if (GNUNET_MESSENGER_KIND_UNKNOWN == message->header.kind)
773  {
774  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Message error: Kind is unknown! (%d)\n", message->header.kind);
775  return GNUNET_SYSERR;
776  }
777 
778  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
779 
780  const struct GNUNET_MESSENGER_Message *previous = get_store_message(message_store, &(message->header.previous));
781 
782  if (!previous)
783  goto skip_time_comparison;
784 
785  struct GNUNET_TIME_Absolute timestamp = GNUNET_TIME_absolute_ntoh(message->header.timestamp);
787 
788  if (GNUNET_TIME_relative_get_zero_().rel_value_us != GNUNET_TIME_absolute_get_difference(timestamp, last).rel_value_us)
789  {
790  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Message error: Timestamp does not check out!\n");
791  return GNUNET_SYSERR;
792  }
793 
794 skip_time_comparison:
795  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Receiving message of kind: %s!\n",
797 
798  return GNUNET_OK;
799 }
struct GNUNET_MESSENGER_MessageHeader header
Header.
struct GNUNET_MESSENGER_MessageStore * get_room_message_store(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the used message store of a given room.
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_ntoh(struct GNUNET_TIME_AbsoluteNBO a)
Convert absolute time from network byte order.
Definition: time.c:542
struct GNUNET_TIME_AbsoluteNBO timestamp
The timestamp of the message.
struct GNUNET_TIME_Relative GNUNET_TIME_relative_get_zero_(void)
Return relative time of 0ms.
Definition: time.c:100
const char * GNUNET_MESSENGER_name_of_kind(enum GNUNET_MESSENGER_MessageKind kind)
Get the name of a message kind.
Definition: messenger_api.c:35
const struct GNUNET_MESSENGER_Message * get_store_message(struct GNUNET_MESSENGER_MessageStore *store, const struct GNUNET_HashCode *hash)
Returns the message from a message store matching a given hash.
struct GNUNET_HashCode previous
The hash of the previous message from the senders perspective.
#define GNUNET_log(kind,...)
Time for absolute times used by GNUnet, in microseconds.
struct GNUNET_TIME_Relative GNUNET_TIME_absolute_get_difference(struct GNUNET_TIME_Absolute start, struct GNUNET_TIME_Absolute end)
Compute the time difference between the given start and end times.
Definition: time.c:248
enum GNUNET_MESSENGER_MessageKind kind
The kind of the message.
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◆ check_tunnel_message()

int check_tunnel_message ( void *  cls,
const struct GNUNET_MessageHeader header 
)

Definition at line 106 of file gnunet-service-messenger_tunnel.c.

References callback_room_handle_message(), callback_verify_room_message(), decode_message(), get_message_kind_size(), GNUNET_ERROR_TYPE_WARNING, GNUNET_log, GNUNET_MESSENGER_KIND_UNKNOWN, GNUNET_SYSERR, GNUNET_YES, handle, hash_message(), GNUNET_MESSENGER_SrvTunnel::room, GNUNET_MessageHeader::size, and update_room_message().

Referenced by join_room_locally().

107 {
108  struct GNUNET_MESSENGER_SrvTunnel *tunnel = cls;
109 
110  if (!tunnel)
111  return GNUNET_SYSERR;
112 
113  const uint16_t length = ntohs (header->size) - sizeof(*header);
114  const char *buffer = (const char*) &header[1];
115 
116  struct GNUNET_MESSENGER_Message message;
117 
119  {
120  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Tunnel error: Message too short! (%d)\n", length);
121  return GNUNET_SYSERR;
122  }
123 
124  uint16_t padding = 0;
125 
126  if (GNUNET_YES != decode_message (&message, length, buffer, GNUNET_YES, &padding))
127  {
128  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Tunnel error: Decoding failed!\n");
129  return GNUNET_SYSERR;
130  }
131 
132  struct GNUNET_HashCode hash;
133  hash_message (&message, length - padding, buffer, &hash);
134 
135  return callback_verify_room_message (tunnel->room, cls, &message, &hash);
136 }
int decode_message(struct GNUNET_MESSENGER_Message *message, uint16_t length, const char *buffer, int include_signature, uint16_t *padding)
Decodes a message from a given buffer of a maximal length in bytes.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
uint16_t get_message_kind_size(enum GNUNET_MESSENGER_MessageKind kind)
Returns the minimal size in bytes to encode a message of a specific kind.
int callback_verify_room_message(struct GNUNET_MESSENGER_SrvRoom *room, void *cls, struct GNUNET_MESSENGER_Message *message, struct GNUNET_HashCode *hash)
struct GNUNET_MESSENGER_SrvRoom * room
A 512-bit hashcode.
void hash_message(const struct GNUNET_MESSENGER_Message *message, uint16_t length, const char *buffer, struct GNUNET_HashCode *hash)
Calculates a hash of a given buffer with a length in bytes from a message.
#define GNUNET_log(kind,...)
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◆ update_room_message()

int update_room_message ( struct GNUNET_MESSENGER_SrvRoom room,
struct GNUNET_MESSENGER_Message message,
const struct GNUNET_HashCode hash 
)

Definition at line 947 of file gnunet-service-messenger_room.c.

References GNUNET_MESSENGER_Message::body, cancel_store_operation(), destroy_message(), get_room_key(), get_room_message_store(), get_room_operation_store(), get_store_message(), get_store_operation_type(), GNUNET_assert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_h2s(), GNUNET_log, GNUNET_MESSENGER_KIND_INFO, GNUNET_MESSENGER_KIND_MERGE, GNUNET_MESSENGER_KIND_REQUEST, GNUNET_MESSENGER_OP_MERGE, GNUNET_MESSENGER_OP_REQUEST, GNUNET_NO, GNUNET_OK, GNUNET_YES, GNUNET_MESSENGER_Message::header, GNUNET_MESSENGER_MessageHeader::kind, GNUNET_MESSENGER_MessageBody::merge, GNUNET_MESSENGER_MessageMerge::previous, GNUNET_MESSENGER_MessageHeader::previous, put_store_message(), GNUNET_MESSENGER_SrvRoom::state, and update_message_state().

Referenced by check_tunnel_message(), handle_tunnel_message(), iterate_send_room_message(), and send_room_message().

949 {
950  GNUNET_assert((room) && (message) && (hash));
951 
952  struct GNUNET_MESSENGER_OperationStore *operation_store = get_room_operation_store(room);
953 
954  const int requested = (GNUNET_MESSENGER_OP_REQUEST == get_store_operation_type(operation_store, hash)?
956  );
957 
958  if (GNUNET_YES == requested)
959  cancel_store_operation(operation_store, hash);
960 
961  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
962 
963  const struct GNUNET_MESSENGER_Message *old_message = get_store_message (message_store, hash);
964 
965  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Handle a message in room (%s).\n", GNUNET_h2s (get_room_key(room)));
966 
967  if ((old_message) || (GNUNET_OK != put_store_message (message_store, hash, message)))
968  {
969  if (old_message != message)
970  destroy_message(message);
971 
972  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Duplicate message got dropped!\n");
973  return GNUNET_NO;
974  }
975 
976  update_message_state(&(room->state), requested, message, hash);
977 
978  if ((GNUNET_YES == requested) ||
979  (GNUNET_MESSENGER_KIND_INFO == message->header.kind) ||
981  return GNUNET_YES;
982 
983  if ((GNUNET_MESSENGER_KIND_MERGE == message->header.kind) &&
984  (GNUNET_MESSENGER_OP_MERGE == get_store_operation_type(operation_store, &(message->body.merge.previous))))
985  cancel_store_operation(operation_store, &(message->body.merge.previous));
986 
987  if (GNUNET_MESSENGER_OP_MERGE == get_store_operation_type(operation_store, &(message->header.previous)))
988  cancel_store_operation(operation_store, &(message->header.previous));
989 
990  return GNUNET_YES;
991 }
struct GNUNET_MESSENGER_MessageHeader header
Header.
struct GNUNET_MESSENGER_MessageStore * get_room_message_store(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the used message store of a given room.
void destroy_message(struct GNUNET_MESSENGER_Message *message)
Destroys a message and frees its memory fully.
struct GNUNET_MESSENGER_MessageState state
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
struct GNUNET_MESSENGER_OperationStore * get_room_operation_store(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the used operation store of a given room.
struct GNUNET_HashCode previous
The hash of a second previous message.
struct GNUNET_MESSENGER_MessageBody body
Body.
struct GNUNET_MESSENGER_MessageMerge merge
const struct GNUNET_MESSENGER_Message * get_store_message(struct GNUNET_MESSENGER_MessageStore *store, const struct GNUNET_HashCode *hash)
Returns the message from a message store matching a given hash.
enum GNUNET_MESSENGER_OperationType get_store_operation_type(const struct GNUNET_MESSENGER_OperationStore *store, const struct GNUNET_HashCode *hash)
Returns the type of the active operation under a given hash in a specific operation store...
struct GNUNET_HashCode previous
The hash of the previous message from the senders perspective.
void cancel_store_operation(struct GNUNET_MESSENGER_OperationStore *store, const struct GNUNET_HashCode *hash)
Stops any active operation under a given hash in a specific operation store.
#define GNUNET_log(kind,...)
void update_message_state(struct GNUNET_MESSENGER_MessageState *state, int requested, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
const struct GNUNET_HashCode * get_room_key(const struct GNUNET_MESSENGER_SrvRoom *room)
Returns the shared secret you need to access a room.
int put_store_message(struct GNUNET_MESSENGER_MessageStore *store, const struct GNUNET_HashCode *hash, struct GNUNET_MESSENGER_Message *message)
Stores a message into the message store.
enum GNUNET_MESSENGER_MessageKind kind
The kind of the message.
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◆ callback_room_handle_message()

void callback_room_handle_message ( struct GNUNET_MESSENGER_SrvRoom room,
struct GNUNET_MESSENGER_SrvHandle handle,
const struct GNUNET_MESSENGER_Message message,
const struct GNUNET_HashCode hash 
)

Definition at line 1036 of file gnunet-service-messenger_room.c.

References add_to_list_messages(), get_member_session_of(), get_room_member_store(), get_store_member_of(), GNUNET_CONTAINER_DLL_remove, GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_WARNING, GNUNET_free, GNUNET_h2s(), GNUNET_log, GNUNET_MESSENGER_KIND_DELETE, GNUNET_MESSENGER_KIND_ID, GNUNET_MESSENGER_KIND_JOIN, GNUNET_MESSENGER_KIND_KEY, GNUNET_MESSENGER_KIND_LEAVE, GNUNET_MESSENGER_KIND_MISS, GNUNET_MESSENGER_KIND_NAME, GNUNET_MESSENGER_KIND_PEER, GNUNET_NO, GNUNET_YES, handle_message_delete(), handle_message_id(), handle_message_join(), handle_message_key(), handle_message_leave(), handle_message_miss(), handle_message_name(), handle_message_peer(), handle_room_messages(), GNUNET_MESSENGER_SrvRoom::handling, GNUNET_MESSENGER_MemberUpdate::hash, GNUNET_MESSENGER_ListMessages::head, GNUNET_MESSENGER_MemberUpdate::head, GNUNET_MESSENGER_Message::header, iterate_store_members(), iterate_update_member_sessions(), GNUNET_MESSENGER_MessageHeader::kind, GNUNET_MESSENGER_MemberUpdate::message, remove_room_member_session(), GNUNET_MESSENGER_MemberSessionCompletion::session, and GNUNET_MESSENGER_MemberUpdate::tail.

Referenced by check_tunnel_message(), handle_tunnel_message(), iterate_send_room_message(), and send_room_message().

1038 {
1039  struct GNUNET_MESSENGER_MemberStore *member_store = get_room_member_store(room);
1040  struct GNUNET_MESSENGER_Member *member = get_store_member_of(member_store, message);
1041 
1042  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Callback for message (%s)\n", GNUNET_h2s (hash));
1043 
1044  if (!member)
1045  {
1046  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Message handling dropped: Member is missing!\n");
1047  return;
1048  }
1049 
1050  struct GNUNET_MESSENGER_MemberSession *session = get_member_session_of(member, message, hash);
1051 
1052  if (!session)
1053  {
1054  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Message handling dropped: Session is missing!\n");
1055  return;
1056  }
1057 
1058  struct GNUNET_MESSENGER_MemberUpdate update;
1059  update.message = message;
1060  update.hash = hash;
1061 
1062  update.head = NULL;
1063  update.tail = NULL;
1064 
1065  iterate_store_members(member_store, iterate_update_member_sessions, &update);
1066 
1067  while (update.head)
1068  {
1069  struct GNUNET_MESSENGER_MemberSessionCompletion *element = update.head;
1070 
1071  remove_room_member_session (room, element->session);
1072 
1073  GNUNET_CONTAINER_DLL_remove(update.head, update.tail, element);
1074  GNUNET_free (element);
1075  }
1076 
1077  const int start_handle = room->handling.head ? GNUNET_NO : GNUNET_YES;
1078 
1079  add_to_list_messages (&(room->handling), hash);
1080 
1081  switch (message->header.kind)
1082  {
1084  handle_message_join (room, session, message, hash);
1085  break;
1087  handle_message_leave (room, session, message, hash);
1088  break;
1090  handle_message_name (room, session, message, hash);
1091  break;
1093  handle_message_key (room, session, message, hash);
1094  break;
1096  handle_message_peer (room, session, message, hash);
1097  break;
1099  handle_message_id (room, session, message, hash);
1100  break;
1102  handle_message_miss (room, session, message, hash);
1103  break;
1105  handle_message_delete (room, session, message, hash);
1106  break;
1107  default:
1108  break;
1109  }
1110 
1111  if (GNUNET_YES == start_handle)
1112  handle_room_messages (room);
1113 }
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
struct GNUNET_MESSENGER_MessageHeader header
Header.
void handle_message_name(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received or sent name message to rename a current member.
void handle_message_peer(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received or sent peer message to make changes of the basement in the room.
struct GNUNET_MESSENGER_ListMessage * head
struct GNUNET_MESSENGER_MemberSession * session
void handle_message_leave(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received or sent leave message to make changes of current member information.
int iterate_store_members(struct GNUNET_MESSENGER_MemberStore *store, GNUNET_MESSENGER_MemberIteratorCallback it, void *cls)
Iterate through all member sessions currently connected to the members of the given member store and ...
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
void handle_message_key(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received or sent key message to change the key of a member and rearrange the contacts accor...
struct GNUNET_MESSENGER_MemberStore * get_room_member_store(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the used member store of a given room.
void handle_message_miss(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received or sent miss message to drop a peer from the basement in the room.
void add_to_list_messages(struct GNUNET_MESSENGER_ListMessages *messages, const struct GNUNET_HashCode *hash)
Adds a specific hash from a message to the end of the list.
struct GNUNET_MESSENGER_ListMessages handling
static void remove_room_member_session(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session)
static int iterate_update_member_sessions(void *cls, const struct GNUNET_IDENTITY_PublicKey *public_key, struct GNUNET_MESSENGER_MemberSession *session)
const struct GNUNET_MESSENGER_Message * message
struct GNUNET_MESSENGER_Member * get_store_member_of(struct GNUNET_MESSENGER_MemberStore *store, const struct GNUNET_MESSENGER_Message *message)
Returns the member of a store using a sender id of a given message.
void handle_message_id(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received or sent id message to change a members id.
#define GNUNET_log(kind,...)
static void handle_room_messages(struct GNUNET_MESSENGER_SrvRoom *room)
struct GNUNET_MESSENGER_MemberSession * get_member_session_of(struct GNUNET_MESSENGER_Member *member, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Returns the member session of a member using a public key which can verify the signature of a given m...
void handle_message_delete(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received or sent delete message to delete a specific message from the store.
void handle_message_join(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received or sent join message to make changes of current member information.
#define GNUNET_free(ptr)
Wrapper around free.
enum GNUNET_MESSENGER_MessageKind kind
The kind of the message.
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◆ update_tunnel_last_message()

static void update_tunnel_last_message ( struct GNUNET_MESSENGER_SrvTunnel tunnel,
const struct GNUNET_HashCode hash 
)
static

Definition at line 147 of file gnunet-service-messenger_tunnel.c.

References get_room_message_store(), get_room_operation_store(), get_store_message(), get_store_operation_type(), GNUNET_MESSENGER_OP_REQUEST, GNUNET_NO, GNUNET_YES, GNUNET_MESSENGER_SrvTunnel::room, GNUNET_MESSENGER_SrvTunnel::state, and update_message_state().

Referenced by callback_tunnel_sent(), and handle_tunnel_message().

148 {
149  struct GNUNET_MESSENGER_OperationStore *operation_store = get_room_operation_store(tunnel->room);
150 
151  const int requested = (GNUNET_MESSENGER_OP_REQUEST == get_store_operation_type(operation_store, hash)?
153  );
154 
155  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(tunnel->room);
156 
157  const struct GNUNET_MESSENGER_Message *message = get_store_message(message_store, hash);
158 
159  if (message)
160  update_message_state(&(tunnel->state), requested, message, hash);
161 }
struct GNUNET_MESSENGER_MessageStore * get_room_message_store(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the used message store of a given room.
struct GNUNET_MESSENGER_OperationStore * get_room_operation_store(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the used operation store of a given room.
struct GNUNET_MESSENGER_SrvRoom * room
const struct GNUNET_MESSENGER_Message * get_store_message(struct GNUNET_MESSENGER_MessageStore *store, const struct GNUNET_HashCode *hash)
Returns the message from a message store matching a given hash.
enum GNUNET_MESSENGER_OperationType get_store_operation_type(const struct GNUNET_MESSENGER_OperationStore *store, const struct GNUNET_HashCode *hash)
Returns the type of the active operation under a given hash in a specific operation store...
struct GNUNET_MESSENGER_MessageState state
void update_message_state(struct GNUNET_MESSENGER_MessageState *state, int requested, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
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◆ handle_tunnel_message()

void handle_tunnel_message ( void *  cls,
const struct GNUNET_MessageHeader header 
)

Definition at line 164 of file gnunet-service-messenger_tunnel.c.

References callback_room_handle_message(), GNUNET_MESSENGER_SrvTunnel::channel, copy_message(), decode_message(), forward_room_message(), GNUNET_CADET_receive_done(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_MESSENGER_KIND_INFO, GNUNET_MESSENGER_KIND_PEER, GNUNET_MESSENGER_KIND_REQUEST, GNUNET_MESSENGER_name_of_kind(), GNUNET_YES, hash_message(), GNUNET_MESSENGER_Message::header, GNUNET_MESSENGER_MessageHeader::kind, recv_message_info(), recv_message_peer(), recv_message_request(), GNUNET_MESSENGER_SrvTunnel::room, GNUNET_MessageHeader::size, update_room_message(), and update_tunnel_last_message().

Referenced by join_room_locally().

165 {
166  struct GNUNET_MESSENGER_SrvTunnel *tunnel = cls;
167 
168  const uint16_t length = ntohs (header->size) - sizeof(*header);
169  const char *buffer = (const char*) &header[1];
170 
171  struct GNUNET_MESSENGER_Message message;
172  struct GNUNET_HashCode hash;
173 
174  uint16_t padding = 0;
175 
176  decode_message (&message, length, buffer, GNUNET_YES, &padding);
177  hash_message (&message, length - padding, buffer, &hash);
178 
179  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Got message of kind: %s!\n",
180  GNUNET_MESSENGER_name_of_kind(message.header.kind));
181 
182  if (!tunnel)
183  return;
184 
185  const int new_message = update_room_message (
186  tunnel->room, copy_message (&message), &hash
187  );
188 
189  if (GNUNET_YES != new_message)
190  goto receive_done;
191 
192  update_tunnel_last_message (tunnel, &hash);
193 
194  int forward_message = GNUNET_YES;
195 
196  switch (message.header.kind)
197  {
199  forward_message = recv_message_info (tunnel->room, tunnel, &message, &hash);
200  break;
202  forward_message = recv_message_peer (tunnel->room, tunnel, &message, &hash);
203  break;
205  forward_message = recv_message_request (tunnel->room, tunnel, &message, &hash);
206  break;
207  default:
208  break;
209  }
210 
211  if (GNUNET_YES == forward_message)
212  {
213  forward_room_message (tunnel->room, tunnel, &message, &hash);
214  callback_room_handle_message (tunnel->room, NULL, &message, &hash);
215  }
216 
217 receive_done:
219 }
int decode_message(struct GNUNET_MESSENGER_Message *message, uint16_t length, const char *buffer, int include_signature, uint16_t *padding)
Decodes a message from a given buffer of a maximal length in bytes.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
int recv_message_info(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received info message to change the current member id to the one generated by the host conn...
int update_room_message(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
const char * GNUNET_MESSENGER_name_of_kind(enum GNUNET_MESSENGER_MessageKind kind)
Get the name of a message kind.
Definition: messenger_api.c:35
struct GNUNET_MESSENGER_SrvRoom * room
A 512-bit hashcode.
int recv_message_request(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received request message by checking for the requested message and forwarding it back if th...
void callback_room_handle_message(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
struct GNUNET_MESSENGER_Message * copy_message(const struct GNUNET_MESSENGER_Message *message)
Creates and allocates a copy of a given message.
void hash_message(const struct GNUNET_MESSENGER_Message *message, uint16_t length, const char *buffer, struct GNUNET_HashCode *hash)
Calculates a hash of a given buffer with a length in bytes from a message.
struct GNUNET_CADET_Channel * channel
int recv_message_peer(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received peer message to link it to its origin tunnel if the peer identity matches...
void GNUNET_CADET_receive_done(struct GNUNET_CADET_Channel *channel)
Send an ack on the channel to confirm the processing of a message.
Definition: cadet_api.c:888
#define GNUNET_log(kind,...)
static void update_tunnel_last_message(struct GNUNET_MESSENGER_SrvTunnel *tunnel, const struct GNUNET_HashCode *hash)
void forward_room_message(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel, struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Forwards a message with a given hash to a specific tunnel inside of a room.
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◆ connect_tunnel()

int connect_tunnel ( struct GNUNET_MESSENGER_SrvTunnel tunnel)

Tries to connect a tunnel by creating a new CADET channel and binding it.

The function returns GNUNET_YES on success, otherwise GNUNET_NO.

Parameters

Definition at line 222 of file gnunet-service-messenger_tunnel.c.

References cadet, callback_tunnel_disconnect(), GNUNET_MESSENGER_SrvTunnel::channel, convert_messenger_key_to_port(), get_room_cadet(), get_room_key(), GNUNET_assert, GNUNET_CADET_channel_create(), GNUNET_MESSAGE_TYPE_CADET_CLI, GNUNET_MQ_handler_end, GNUNET_MQ_hd_var_size, GNUNET_NO, GNUNET_PEER_resolve2(), GNUNET_YES, key, GNUNET_MESSENGER_SrvTunnel::peer, and GNUNET_MESSENGER_SrvTunnel::room.

Referenced by enter_room_at(), and rebuild_room_basement_structure().

223 {
224  GNUNET_assert(tunnel);
225 
226  if (tunnel->channel)
227  return GNUNET_NO;
228 
229  const struct GNUNET_PeerIdentity *door = GNUNET_PEER_resolve2 (tunnel->peer);
230 
231  struct GNUNET_CADET_Handle *cadet = get_room_cadet (tunnel->room);
232  const struct GNUNET_HashCode *key = get_room_key (tunnel->room);
233 
235  struct GNUNET_MessageHeader, NULL),
237 
238  struct GNUNET_HashCode port;
240  tunnel->channel = GNUNET_CADET_channel_create (cadet, tunnel, door, &port, NULL, callback_tunnel_disconnect, handlers);
241 
242  return GNUNET_YES;
243 }
const struct GNUNET_PeerIdentity * GNUNET_PEER_resolve2(GNUNET_PEER_Id id)
Convert an interned PID to a normal peer identity.
Definition: peer.c:245
static struct GNUNET_CADET_Handle * cadet
Handle for cadet.
Opaque handle to the service.
Definition: cadet_api.c:38
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
void callback_tunnel_disconnect(void *cls, const struct GNUNET_CADET_Channel *channel)
#define GNUNET_MESSAGE_TYPE_CADET_CLI
Traffic (net-cat style) used by the Command Line Interface.
struct GNUNET_CADET_Handle * get_room_cadet(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the CADET handle from a rooms service.
static struct GNUNET_CADET_MessageHandler handlers[]
Handlers, for diverse services.
#define GNUNET_MQ_hd_var_size(name, code, str, ctx)
struct GNUNET_MESSENGER_SrvRoom * room
A 512-bit hashcode.
Message handler for a specific message type.
struct GNUNET_HashCode key
The key used in the DHT.
struct GNUNET_CADET_Channel * channel
void convert_messenger_key_to_port(const struct GNUNET_HashCode *key, struct GNUNET_HashCode *port)
Converts a Messenger service key of a room to the specific port which gets used for the CADET channel...
The identity of the host (wraps the signing key of the peer).
struct GNUNET_CADET_Channel * GNUNET_CADET_channel_create(struct GNUNET_CADET_Handle *h, void *channel_cls, const struct GNUNET_PeerIdentity *destination, const struct GNUNET_HashCode *port, GNUNET_CADET_WindowSizeEventHandler window_changes, GNUNET_CADET_DisconnectEventHandler disconnects, const struct GNUNET_MQ_MessageHandler *handlers)
Create a new channel towards a remote peer.
Definition: cadet_api.c:1031
static uint16_t port
Port number.
Definition: gnunet-bcd.c:83
const struct GNUNET_HashCode * get_room_key(const struct GNUNET_MESSENGER_SrvRoom *room)
Returns the shared secret you need to access a room.
Header for all communications.
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
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◆ disconnect_tunnel()

void disconnect_tunnel ( struct GNUNET_MESSENGER_SrvTunnel tunnel)

Disconnects and unbinds a channel from a tunnel.

The actual disconnection will be asynchronous.

Parameters

Definition at line 246 of file gnunet-service-messenger_tunnel.c.

References GNUNET_MESSENGER_SrvTunnel::channel, delayed_disconnect_channel(), and GNUNET_assert.

Referenced by callback_room_connect(), rebuild_room_basement_structure(), and recv_message_info().

247 {
248  GNUNET_assert(tunnel);
249 
250  if (tunnel->channel)
251  {
253 
254  tunnel->channel = NULL;
255  }
256 }
void delayed_disconnect_channel(struct GNUNET_CADET_Channel *channel)
Starts an urgent task to close a CADET channel asynchronously.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
struct GNUNET_CADET_Channel * channel
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◆ is_tunnel_connected()

int is_tunnel_connected ( const struct GNUNET_MESSENGER_SrvTunnel tunnel)

Returns the status of a currently bound channel of a tunnel.

Parameters
[in]tunnelTunnel
Returns
GNUNET_YES or GNUNET_NO

Definition at line 259 of file gnunet-service-messenger_tunnel.c.

References GNUNET_MESSENGER_SrvTunnel::channel, GNUNET_assert, GNUNET_NO, and GNUNET_YES.

Referenced by iterate_send_room_message(), and send_room_info().

260 {
261  GNUNET_assert(tunnel);
262 
263  return (tunnel->channel ? GNUNET_YES : GNUNET_NO);
264 }
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
struct GNUNET_CADET_Channel * channel
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◆ callback_tunnel_sent()

static void callback_tunnel_sent ( void *  cls)
static

Definition at line 273 of file gnunet-service-messenger_tunnel.c.

References GNUNET_free, GNUNET_MESSENGER_MessageSent::hash, GNUNET_MESSENGER_MessageSent::tunnel, and update_tunnel_last_message().

Referenced by send_tunnel_envelope().

274 {
275  struct GNUNET_MESSENGER_MessageSent *sent = cls;
276 
277  if (sent->tunnel)
278  update_tunnel_last_message (sent->tunnel, &(sent->hash));
279 
280  GNUNET_free(sent);
281 }
struct GNUNET_MESSENGER_SrvTunnel * tunnel
static void update_tunnel_last_message(struct GNUNET_MESSENGER_SrvTunnel *tunnel, const struct GNUNET_HashCode *hash)
#define GNUNET_free(ptr)
Wrapper around free.
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◆ send_tunnel_envelope()

void send_tunnel_envelope ( struct GNUNET_MESSENGER_SrvTunnel tunnel,
struct GNUNET_MQ_Envelope env,
const struct GNUNET_HashCode hash 
)

Sends an envelope containing a message with a given hash through a tunnel.

Parameters

Definition at line 284 of file gnunet-service-messenger_tunnel.c.

References callback_tunnel_sent(), GNUNET_MESSENGER_SrvTunnel::channel, GNUNET_assert, GNUNET_CADET_get_mq(), GNUNET_memcpy, GNUNET_MQ_notify_sent(), GNUNET_MQ_send(), GNUNET_new, GNUNET_MESSENGER_MessageSent::hash, mq, and GNUNET_MESSENGER_MessageSent::tunnel.

Referenced by forward_tunnel_message(), iterate_send_room_message(), and send_tunnel_message().

286 {
287  GNUNET_assert((tunnel) && (env) && (hash));
288 
289  struct GNUNET_MQ_Handle *mq = GNUNET_CADET_get_mq (tunnel->channel);
290 
292 
293  GNUNET_memcpy(&(sent->hash), hash, sizeof(struct GNUNET_HashCode));
294 
295  sent->tunnel = tunnel;
296 
298  GNUNET_MQ_send (mq, env);
299 }
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
void GNUNET_MQ_notify_sent(struct GNUNET_MQ_Envelope *ev, GNUNET_SCHEDULER_TaskCallback cb, void *cb_cls)
Call a callback once the envelope has been sent, that is, sending it can not be canceled anymore...
Definition: mq.c:787
A 512-bit hashcode.
struct GNUNET_MESSENGER_SrvTunnel * tunnel
struct GNUNET_CADET_Channel * channel
Handle to a message queue.
Definition: mq.c:85
struct GNUNET_MQ_Handle * mq
Definition: 003.c:5
void GNUNET_MQ_send(struct GNUNET_MQ_Handle *mq, struct GNUNET_MQ_Envelope *ev)
Send a message with the given message queue.
Definition: mq.c:355
static void callback_tunnel_sent(void *cls)
struct GNUNET_MQ_Handle * GNUNET_CADET_get_mq(const struct GNUNET_CADET_Channel *channel)
Obtain the message queue for a connected peer.
Definition: cadet_api.c:1082
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◆ send_tunnel_message()

int send_tunnel_message ( struct GNUNET_MESSENGER_SrvTunnel tunnel,
void *  handle,
struct GNUNET_MESSENGER_Message message 
)

Sends a message by packing it automatically into an envelope and passing it through the tunnel.

The used handle will sign the message and the hash will be calculated and stored.

Parameters

Definition at line 302 of file gnunet-service-messenger_tunnel.c.

References destroy_message(), env, GNUNET_assert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_h2s(), GNUNET_log, GNUNET_MESSENGER_PACK_MODE_ENVELOPE, GNUNET_NO, GNUNET_YES, pack_room_message(), GNUNET_MESSENGER_SrvTunnel::room, and send_tunnel_envelope().

Referenced by recv_message_info(), and send_room_info().

303 {
304  GNUNET_assert((tunnel) && (handle));
305 
306  if (!message)
307  return GNUNET_NO;
308 
309  struct GNUNET_HashCode hash;
311  tunnel->room, (struct GNUNET_MESSENGER_SrvHandle*) handle,
313  );
314 
315  destroy_message(message);
316 
317  if (!env)
318  return GNUNET_NO;
319 
320  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Sending tunnel message: %s\n",
321  GNUNET_h2s(&hash));
322 
323  send_tunnel_envelope (tunnel, env, &hash);
324  return GNUNET_YES;
325 }
void destroy_message(struct GNUNET_MESSENGER_Message *message)
Destroys a message and frees its memory fully.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
struct GNUNET_MQ_Envelope * pack_room_message(const struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_MESSENGER_SrvHandle *handle, struct GNUNET_MESSENGER_Message *message, struct GNUNET_HashCode *hash, int mode)
Packs a message depending on the selected mode into a newly allocated envelope.
struct GNUNET_MESSENGER_SrvRoom * room
static struct GNUNET_DNS_Handle * handle
Handle to transport service.
A 512-bit hashcode.
#define GNUNET_MESSENGER_PACK_MODE_ENVELOPE
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
#define GNUNET_log(kind,...)
void send_tunnel_envelope(struct GNUNET_MESSENGER_SrvTunnel *tunnel, struct GNUNET_MQ_Envelope *env, const struct GNUNET_HashCode *hash)
Sends an envelope containing a message with a given hash through a tunnel.
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◆ forward_tunnel_message()

void forward_tunnel_message ( struct GNUNET_MESSENGER_SrvTunnel tunnel,
const struct GNUNET_MESSENGER_Message message,
const struct GNUNET_HashCode hash 
)

Forwards a given message with a known hash through a tunnel.

Parameters

Definition at line 328 of file gnunet-service-messenger_tunnel.c.

References copy_message(), destroy_message(), env, GNUNET_assert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_h2s(), GNUNET_log, GNUNET_MESSENGER_PACK_MODE_ENVELOPE, pack_message(), and send_tunnel_envelope().

Referenced by callback_found_message(), check_room_peer_status(), and forward_about_members().

330 {
331  GNUNET_assert((tunnel) && (message) && (hash));
332 
333  struct GNUNET_MESSENGER_Message *copy = copy_message(message);
335 
336  destroy_message(copy);
337 
338  if (!env)
339  return;
340 
341  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Forwarding tunnel message: %s\n",
342  GNUNET_h2s(hash));
343 
344  send_tunnel_envelope (tunnel, env, hash);
345 }
void destroy_message(struct GNUNET_MESSENGER_Message *message)
Destroys a message and frees its memory fully.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
struct GNUNET_MQ_Envelope * pack_message(struct GNUNET_MESSENGER_Message *message, struct GNUNET_HashCode *hash, const struct GNUNET_MESSENGER_Ego *ego, int mode)
Encodes the message to pack it into a newly allocated envelope if mode is equal to GNUNET_MESSENGER_P...
struct GNUNET_MESSENGER_Message * copy_message(const struct GNUNET_MESSENGER_Message *message)
Creates and allocates a copy of a given message.
#define GNUNET_MESSENGER_PACK_MODE_ENVELOPE
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
#define GNUNET_log(kind,...)
void send_tunnel_envelope(struct GNUNET_MESSENGER_SrvTunnel *tunnel, struct GNUNET_MQ_Envelope *env, const struct GNUNET_HashCode *hash)
Sends an envelope containing a message with a given hash through a tunnel.
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◆ get_tunnel_peer_message()

const struct GNUNET_HashCode* get_tunnel_peer_message ( const struct GNUNET_MESSENGER_SrvTunnel tunnel)

Returns the hash of the latest peer message published through a given tunnel and matching the tunnels peer identity.

If no peer message has been linked to the tunnel yet, NULL gets returned.

Parameters
[in]tunnelTunnel
Returns
Hash of peer message or NULL

Definition at line 348 of file gnunet-service-messenger_tunnel.c.

References GNUNET_assert, and GNUNET_MESSENGER_SrvTunnel::peer_message.

349 {
350  GNUNET_assert(tunnel);
351 
352  return tunnel->peer_message;
353 }
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.

◆ get_tunnel_peer_identity()

void get_tunnel_peer_identity ( const struct GNUNET_MESSENGER_SrvTunnel tunnel,
struct GNUNET_PeerIdentity peer 
)

Writes the peer identity of the peer connected via tunnel to this peer into the peer parameter.

Parameters
[in]tunnelTunnel
[out]peerPeer identity

Definition at line 356 of file gnunet-service-messenger_tunnel.c.

References GNUNET_assert, GNUNET_PEER_resolve(), and GNUNET_MESSENGER_SrvTunnel::peer.

Referenced by callback_room_disconnect(), and recv_message_info().

357 {
358  GNUNET_assert(tunnel);
359 
360  GNUNET_PEER_resolve(tunnel->peer, peer);
361 }
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
void GNUNET_PEER_resolve(GNUNET_PEER_Id id, struct GNUNET_PeerIdentity *pid)
Convert an interned PID to a normal peer identity.
Definition: peer.c:225
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◆ get_tunnel_messenger_version()

uint32_t get_tunnel_messenger_version ( const struct GNUNET_MESSENGER_SrvTunnel tunnel)

Returns the current messenger version the peer connected via a given tunnel has reported to be using if it was compatible during updating.

See also
update_tunnel_messenger_version
Parameters
[in]tunnelTunnel
Returns
Version of messenger

Definition at line 364 of file gnunet-service-messenger_tunnel.c.

References GNUNET_assert, and GNUNET_MESSENGER_SrvTunnel::messenger_version.

Referenced by iterate_send_room_message(), and recv_message_info().

365 {
366  GNUNET_assert(tunnel);
367 
368  return tunnel->messenger_version;
369 }
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
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◆ update_tunnel_messenger_version()

int update_tunnel_messenger_version ( struct GNUNET_MESSENGER_SrvTunnel tunnel,
uint32_t  version 
)

Updates the messenger version of the tunnel to a given version if it is compatible to the running peer of the service.

Depending on success it returns GNUNET_OK or GNUNET_SYSERR on failure.

Parameters

Definition at line 372 of file gnunet-service-messenger_tunnel.c.

References GNUNET_assert, GNUNET_MESSENGER_VERSION, GNUNET_OK, GNUNET_SYSERR, and GNUNET_MESSENGER_SrvTunnel::messenger_version.

Referenced by recv_message_info().

373 {
374  GNUNET_assert(tunnel);
375 
376  if (version != GNUNET_MESSENGER_VERSION)
377  return GNUNET_SYSERR;
378 
379  if (version > tunnel->messenger_version)
380  tunnel->messenger_version = version;
381 
382  return GNUNET_OK;
383 }
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_MESSENGER_VERSION
Version number of GNUnet Messenger API.
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