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

GNUnet MESSENGER service. More...

#include "gnunet-service-messenger.h"
#include "gnunet-service-messenger_handle.h"
#include "gnunet-service-messenger_message_kind.h"
#include "gnunet-service-messenger_service.h"
#include "messenger_api_message.h"
Include dependency graph for gnunet-service-messenger.c:

Go to the source code of this file.

Data Structures

struct  GNUNET_MESSENGER_Client
 

Functions

static int check_create (void *cls, const struct GNUNET_MESSENGER_CreateMessage *msg)
 
static void handle_create (void *cls, const struct GNUNET_MESSENGER_CreateMessage *msg)
 
static void handle_update (void *cls, const struct GNUNET_MESSENGER_UpdateMessage *msg)
 
static void handle_destroy (void *cls, const struct GNUNET_MESSENGER_DestroyMessage *msg)
 
static int check_set_name (void *cls, const struct GNUNET_MESSENGER_NameMessage *msg)
 
static void handle_set_name (void *cls, const struct GNUNET_MESSENGER_NameMessage *msg)
 
static void handle_room_open (void *cls, const struct GNUNET_MESSENGER_RoomMessage *msg)
 
static void handle_room_entry (void *cls, const struct GNUNET_MESSENGER_RoomMessage *msg)
 
static void handle_room_close (void *cls, const struct GNUNET_MESSENGER_RoomMessage *msg)
 
static int check_send_message (void *cls, const struct GNUNET_MESSENGER_SendMessage *msg)
 
static void handle_send_message (void *cls, const struct GNUNET_MESSENGER_SendMessage *msg)
 
static void callback_found_message (void *cls, struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
 
static void handle_get_message (void *cls, const struct GNUNET_MESSENGER_GetMessage *msg)
 
static void * callback_client_connect (void *cls, struct GNUNET_SERVICE_Client *client, struct GNUNET_MQ_Handle *mq)
 
static void callback_client_disconnect (void *cls, struct GNUNET_SERVICE_Client *client, void *internal_cls)
 
static void run (void *cls, const struct GNUNET_CONFIGURATION_Handle *config, struct GNUNET_SERVICE_Handle *service)
 Setup MESSENGER internals. More...
 
 GNUNET_SERVICE_MAIN (GNUNET_MESSENGER_SERVICE_NAME, GNUNET_SERVICE_OPTION_NONE, &run, &callback_client_connect, &callback_client_disconnect, NULL, GNUNET_MQ_hd_var_size(create, GNUNET_MESSAGE_TYPE_MESSENGER_CONNECTION_CREATE, struct GNUNET_MESSENGER_CreateMessage, NULL), GNUNET_MQ_hd_fixed_size(update, GNUNET_MESSAGE_TYPE_MESSENGER_CONNECTION_UPDATE, struct GNUNET_MESSENGER_UpdateMessage, NULL), GNUNET_MQ_hd_fixed_size(destroy, GNUNET_MESSAGE_TYPE_MESSENGER_CONNECTION_DESTROY, struct GNUNET_MESSENGER_DestroyMessage, NULL), GNUNET_MQ_hd_var_size(set_name, GNUNET_MESSAGE_TYPE_MESSENGER_CONNECTION_SET_NAME, struct GNUNET_MESSENGER_NameMessage, NULL), GNUNET_MQ_hd_fixed_size(room_open, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_OPEN, struct GNUNET_MESSENGER_RoomMessage, NULL), GNUNET_MQ_hd_fixed_size(room_entry, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_ENTRY, struct GNUNET_MESSENGER_RoomMessage, NULL), GNUNET_MQ_hd_fixed_size(room_close, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_CLOSE, struct GNUNET_MESSENGER_RoomMessage, NULL), GNUNET_MQ_hd_var_size(send_message, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_SEND_MESSAGE, struct GNUNET_MESSENGER_SendMessage, NULL), GNUNET_MQ_hd_fixed_size(get_message, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_GET_MESSAGE, struct GNUNET_MESSENGER_GetMessage, NULL), GNUNET_MQ_handler_end())
 Define "main" method using service macro. More...
 

Variables

struct GNUNET_MESSENGER_Servicemessenger
 

Detailed Description

GNUnet MESSENGER service.

Author
Tobias Frisch

Definition in file gnunet-service-messenger.c.

Function Documentation

◆ check_create()

static int check_create ( void *  cls,
const struct GNUNET_MESSENGER_CreateMessage msg 
)
static

Definition at line 42 of file gnunet-service-messenger.c.

References GNUNET_MQ_check_zero_termination, and GNUNET_OK.

43 {
45  return GNUNET_OK;
46 }
#define GNUNET_MQ_check_zero_termination(m)
Insert code for a "check_" function that verifies that a given variable-length message received over ...

◆ handle_create()

static void handle_create ( void *  cls,
const struct GNUNET_MESSENGER_CreateMessage msg 
)
static

Definition at line 49 of file gnunet-service-messenger.c.

References GNUNET_MESSENGER_Client::client, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_SERVICE_client_continue(), GNUNET_MESSENGER_Client::handle, name, and setup_handle_name().

50 {
51  struct GNUNET_MESSENGER_Client *msg_client = cls;
52 
53  const char *name = ((const char*) msg) + sizeof(*msg);
54 
55  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Handle created with name: %s\n", name);
56 
57  setup_handle_name (msg_client->handle, strlen (name) > 0 ? name : NULL);
58 
60 }
void setup_handle_name(struct GNUNET_MESSENGER_SrvHandle *handle, const char *name)
Tries to set the name and EGO key of a handle initially by looking up a specific name.
struct GNUNET_SERVICE_Client * client
const char * name
#define GNUNET_log(kind,...)
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2244
struct GNUNET_MESSENGER_SrvHandle * handle
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◆ handle_update()

static void handle_update ( void *  cls,
const struct GNUNET_MESSENGER_UpdateMessage msg 
)
static

Definition at line 63 of file gnunet-service-messenger.c.

References GNUNET_MESSENGER_Client::client, GNUNET_SERVICE_client_continue(), GNUNET_MESSENGER_Client::handle, and update_handle().

64 {
65  struct GNUNET_MESSENGER_Client *msg_client = cls;
66 
67  update_handle (msg_client->handle);
68 
70 }
struct GNUNET_SERVICE_Client * client
void update_handle(struct GNUNET_MESSENGER_SrvHandle *handle)
Tries to change the key pair of an EGO of a handle under the same name and informs all rooms about th...
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2244
struct GNUNET_MESSENGER_SrvHandle * handle
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◆ handle_destroy()

static void handle_destroy ( void *  cls,
const struct GNUNET_MESSENGER_DestroyMessage msg 
)
static

Definition at line 73 of file gnunet-service-messenger.c.

References GNUNET_MESSENGER_Client::client, and GNUNET_SERVICE_client_drop().

74 {
75  struct GNUNET_MESSENGER_Client *msg_client = cls;
76 
77  GNUNET_SERVICE_client_drop (msg_client->client);
78 }
struct GNUNET_SERVICE_Client * client
void GNUNET_SERVICE_client_drop(struct GNUNET_SERVICE_Client *c)
Ask the server to disconnect from the given client.
Definition: service.c:2325
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◆ check_set_name()

static int check_set_name ( void *  cls,
const struct GNUNET_MESSENGER_NameMessage msg 
)
static

Definition at line 81 of file gnunet-service-messenger.c.

References GNUNET_MQ_check_zero_termination, and GNUNET_OK.

82 {
84  return GNUNET_OK;
85 }
#define GNUNET_MQ_check_zero_termination(m)
Insert code for a "check_" function that verifies that a given variable-length message received over ...

◆ handle_set_name()

static void handle_set_name ( void *  cls,
const struct GNUNET_MESSENGER_NameMessage msg 
)
static

Definition at line 88 of file gnunet-service-messenger.c.

References GNUNET_MESSENGER_Client::client, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_SERVICE_client_continue(), GNUNET_MESSENGER_Client::handle, name, and set_handle_name().

89 {
90  struct GNUNET_MESSENGER_Client *msg_client = cls;
91 
92  const char *name = ((const char*) msg) + sizeof(*msg);
93 
94  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Handles name is now: %s\n", name);
95 
96  set_handle_name (msg_client->handle, name);
97 
99 }
struct GNUNET_SERVICE_Client * client
const char * name
void set_handle_name(struct GNUNET_MESSENGER_SrvHandle *handle, const char *name)
Tries to rename the handle which implies renaming the EGO its using and moving all related data into ...
#define GNUNET_log(kind,...)
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2244
struct GNUNET_MESSENGER_SrvHandle * handle
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◆ handle_room_open()

static void handle_room_open ( void *  cls,
const struct GNUNET_MESSENGER_RoomMessage msg 
)
static

Definition at line 102 of file gnunet-service-messenger.c.

References GNUNET_MESSENGER_Client::client, env, get_handle_member_id(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_h2s(), GNUNET_log, GNUNET_memcpy, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_OPEN, GNUNET_MQ_msg, GNUNET_MQ_send(), GNUNET_SERVICE_client_continue(), GNUNET_sh2s(), GNUNET_YES, GNUNET_MESSENGER_Client::handle, GNUNET_MESSENGER_RoomMessage::key, GNUNET_MESSENGER_SrvHandle::mq, open_handle_room(), and response.

103 {
104  struct GNUNET_MESSENGER_Client *msg_client = cls;
105 
106  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Opening room: %s\n", GNUNET_h2s (&(msg->key)));
107 
108  if (GNUNET_YES == open_handle_room (msg_client->handle, &(msg->key)))
109  {
110  const struct GNUNET_ShortHashCode *member_id = get_handle_member_id (msg_client->handle, &(msg->key));
111 
112  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Opening room with member id: %s\n", GNUNET_sh2s (member_id));
113 
115  struct GNUNET_MQ_Envelope *env;
116 
118  GNUNET_memcpy(&(response->key), &(msg->key), sizeof(msg->key));
119  GNUNET_MQ_send (msg_client->handle->mq, env);
120  }
121  else
122  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Opening room failed: %s\n", GNUNET_h2s (&(msg->key)));
123 
125 }
const char * GNUNET_sh2s(const struct GNUNET_ShortHashCode *shc)
Convert a short hash value to a string (for printing debug messages).
struct GNUNET_SERVICE_Client * client
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
A 256-bit hashcode.
int open_handle_room(struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_HashCode *key)
Makes a given handle a member of the room using a specific key and opens the room from the handles se...
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
#define GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_OPEN
#define GNUNET_log(kind,...)
static struct MHD_Response * response
Our canonical response.
const struct GNUNET_ShortHashCode * get_handle_member_id(const struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_HashCode *key)
Returns the member id of a given handle in a specific room.
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
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2244
General message to confirm interaction with a room.
struct GNUNET_MESSENGER_SrvHandle * handle
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◆ handle_room_entry()

static void handle_room_entry ( void *  cls,
const struct GNUNET_MESSENGER_RoomMessage msg 
)
static

Definition at line 128 of file gnunet-service-messenger.c.

References GNUNET_MESSENGER_Client::client, GNUNET_MESSENGER_RoomMessage::door, entry_handle_room(), env, get_handle_member_id(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_h2s(), GNUNET_i2s(), GNUNET_log, GNUNET_memcpy, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_ENTRY, GNUNET_MQ_msg, GNUNET_MQ_send(), GNUNET_SERVICE_client_continue(), GNUNET_sh2s(), GNUNET_YES, GNUNET_MESSENGER_Client::handle, GNUNET_MESSENGER_RoomMessage::key, GNUNET_MESSENGER_SrvHandle::mq, and response.

129 {
130  struct GNUNET_MESSENGER_Client *msg_client = cls;
131 
132  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Entering room: %s, %s\n", GNUNET_h2s (&(msg->key)), GNUNET_i2s (&(msg->door)));
133 
134  if (GNUNET_YES == entry_handle_room (msg_client->handle, &(msg->door), &(msg->key)))
135  {
136  const struct GNUNET_ShortHashCode *member_id = get_handle_member_id (msg_client->handle, &(msg->key));
137 
138  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Entering room with member id: %s\n", GNUNET_sh2s (member_id));
139 
141  struct GNUNET_MQ_Envelope *env;
142 
144  GNUNET_memcpy(&(response->door), &(msg->door), sizeof(msg->door));
145  GNUNET_memcpy(&(response->key), &(msg->key), sizeof(msg->key));
146  GNUNET_MQ_send (msg_client->handle->mq, env);
147  }
148  else
149  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Entrance into room failed: %s, %s\n", GNUNET_h2s (&(msg->key)),
150  GNUNET_i2s (&(msg->door)));
151 
153 }
const char * GNUNET_sh2s(const struct GNUNET_ShortHashCode *shc)
Convert a short hash value to a string (for printing debug messages).
struct GNUNET_SERVICE_Client * client
struct GNUNET_PeerIdentity door
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
A 256-bit hashcode.
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
#define GNUNET_log(kind,...)
static struct MHD_Response * response
Our canonical response.
#define GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_ENTRY
const struct GNUNET_ShortHashCode * get_handle_member_id(const struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_HashCode *key)
Returns the member id of a given handle in a specific room.
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
int entry_handle_room(struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_PeerIdentity *door, const struct GNUNET_HashCode *key)
Makes a given handle a member of the room using a specific key and enters the room through a tunnel t...
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2244
General message to confirm interaction with a room.
struct GNUNET_MESSENGER_SrvHandle * handle
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◆ handle_room_close()

static void handle_room_close ( void *  cls,
const struct GNUNET_MESSENGER_RoomMessage msg 
)
static

Definition at line 156 of file gnunet-service-messenger.c.

References GNUNET_MESSENGER_Client::client, close_handle_room(), env, get_handle_member_id(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_h2s(), GNUNET_log, GNUNET_memcpy, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_CLOSE, GNUNET_MQ_msg, GNUNET_MQ_send(), GNUNET_SERVICE_client_continue(), GNUNET_sh2s(), GNUNET_YES, GNUNET_MESSENGER_Client::handle, GNUNET_MESSENGER_RoomMessage::key, GNUNET_MESSENGER_SrvHandle::mq, and response.

157 {
158  struct GNUNET_MESSENGER_Client *msg_client = cls;
159 
160  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Closing room: %s\n", GNUNET_h2s (&(msg->key)));
161 
162  if (GNUNET_YES == close_handle_room (msg_client->handle, &(msg->key)))
163  {
164  const struct GNUNET_ShortHashCode *member_id = get_handle_member_id (msg_client->handle, &(msg->key));
165 
166  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Closing room with member id: %s\n", GNUNET_sh2s (member_id));
167 
169  struct GNUNET_MQ_Envelope *env;
170 
172  GNUNET_memcpy(&(response->key), &(msg->key), sizeof(msg->key));
173  GNUNET_MQ_send (msg_client->handle->mq, env);
174  }
175  else
176  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Closing room failed: %s\n", GNUNET_h2s (&(msg->key)));
177 
179 }
const char * GNUNET_sh2s(const struct GNUNET_ShortHashCode *shc)
Convert a short hash value to a string (for printing debug messages).
struct GNUNET_SERVICE_Client * client
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
A 256-bit hashcode.
int close_handle_room(struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_HashCode *key)
Removes the membership of the room using a specific key and closes it if no other handle from this se...
#define GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_CLOSE
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
#define GNUNET_log(kind,...)
static struct MHD_Response * response
Our canonical response.
const struct GNUNET_ShortHashCode * get_handle_member_id(const struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_HashCode *key)
Returns the member id of a given handle in a specific room.
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
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2244
General message to confirm interaction with a room.
struct GNUNET_MESSENGER_SrvHandle * handle
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◆ check_send_message()

static int check_send_message ( void *  cls,
const struct GNUNET_MESSENGER_SendMessage msg 
)
static

Definition at line 182 of file gnunet-service-messenger.c.

References decode_message(), filter_message_sending(), GNUNET_MESSENGER_SendMessage::flags, get_message_kind_size(), GNUNET_IDENTITY_read_key_from_buffer(), GNUNET_MESSENGER_FLAG_PRIVATE, GNUNET_MESSENGER_KIND_UNKNOWN, GNUNET_NO, GNUNET_OK, GNUNET_YES, GNUNET_MESSENGER_SendMessage::header, key_length, and GNUNET_MessageHeader::size.

183 {
184  const uint16_t full_length = ntohs (msg->header.size);
185 
186  if (full_length < sizeof(*msg))
187  return GNUNET_NO;
188 
189  const enum GNUNET_MESSENGER_MessageFlags flags = (
191  );
192 
193  const uint16_t length = full_length - sizeof(*msg);
194  const char *buffer = ((const char*) msg) + sizeof(*msg);
195 
196  ssize_t key_length = 0;
197 
198  if (!(flags & GNUNET_MESSENGER_FLAG_PRIVATE))
199  goto check_for_message;
200 
201  struct GNUNET_IDENTITY_PublicKey public_key;
202 
203  key_length = GNUNET_IDENTITY_read_key_from_buffer(&public_key, buffer, length);
204 
205 check_for_message:
206  if (key_length < 0)
207  return GNUNET_NO;
208 
209  const uint16_t msg_length = length - key_length;
210  const char* msg_buffer = buffer + key_length;
211 
212  struct GNUNET_MESSENGER_Message message;
213 
215  return GNUNET_NO;
216 
217  if (GNUNET_YES != decode_message (&message, msg_length, msg_buffer, GNUNET_NO, NULL))
218  return GNUNET_NO;
219 
220  if (GNUNET_YES != filter_message_sending(&message))
221  return GNUNET_NO;
222 
223  return GNUNET_OK;
224 }
ssize_t GNUNET_IDENTITY_read_key_from_buffer(struct GNUNET_IDENTITY_PublicKey *key, const void *buffer, size_t len)
Reads a GNUNET_IDENTITY_PublicKey from a compact buffer.
Definition: identity_api.c:994
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...
GNUNET_MESSENGER_MessageFlags
Enum for the different supported flags used by message handling.
struct GNUNET_MessageHeader header
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 filter_message_sending(const struct GNUNET_MESSENGER_Message *message)
Returns if a specific kind of message should be sent by a client.
static const int key_length
Fixed size of the public/private keys.
Definition: gnunet-abd.c:211
An identity key as per LSD0001.
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◆ handle_send_message()

static void handle_send_message ( void *  cls,
const struct GNUNET_MESSENGER_SendMessage msg 
)
static

Definition at line 227 of file gnunet-service-messenger.c.

References GNUNET_MESSENGER_Client::client, decode_message(), encrypt_message(), GNUNET_MESSENGER_SendMessage::flags, GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_h2s(), GNUNET_IDENTITY_read_key_from_buffer(), GNUNET_log, GNUNET_MESSENGER_FLAG_PRIVATE, GNUNET_MESSENGER_name_of_kind(), GNUNET_NO, GNUNET_SERVICE_client_continue(), GNUNET_YES, GNUNET_MESSENGER_Client::handle, GNUNET_MESSENGER_SendMessage::header, GNUNET_MESSENGER_Message::header, key, GNUNET_MESSENGER_SendMessage::key, key_length, GNUNET_MESSENGER_MessageHeader::kind, send_handle_message(), and GNUNET_MessageHeader::size.

228 {
229  struct GNUNET_MESSENGER_Client *msg_client = cls;
230 
231  const enum GNUNET_MESSENGER_MessageFlags flags = (
233  );
234 
235  const struct GNUNET_HashCode *key = &(msg->key);
236  const char *buffer = ((const char*) msg) + sizeof(*msg);
237 
238  const uint16_t length = ntohs (msg->header.size) - sizeof(*msg);
239  ssize_t key_length = 0;
240 
241  struct GNUNET_IDENTITY_PublicKey public_key;
242 
243  if (flags & GNUNET_MESSENGER_FLAG_PRIVATE)
245  &public_key, buffer, length
246  );
247 
248  const uint16_t msg_length = length - key_length;
249  const char* msg_buffer = buffer + key_length;
250 
251  struct GNUNET_MESSENGER_Message message;
252  decode_message (&message, msg_length, msg_buffer, GNUNET_NO, NULL);
253 
254  if ((flags & GNUNET_MESSENGER_FLAG_PRIVATE) &&
255  (GNUNET_YES != encrypt_message(&message, &public_key)))
256  {
257  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Encrypting message failed: Message got dropped!\n");
258 
259  goto end_handling;
260  }
261 
262  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Sending message: %s to %s\n",
263  GNUNET_MESSENGER_name_of_kind (message.header.kind), GNUNET_h2s (key));
264 
265  if (GNUNET_YES != send_handle_message (msg_client->handle, key, &message))
266  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Sending message failed: %s to %s\n",
267  GNUNET_MESSENGER_name_of_kind (message.header.kind), GNUNET_h2s (key));
268 
269 end_handling:
271 }
struct GNUNET_SERVICE_Client * client
ssize_t GNUNET_IDENTITY_read_key_from_buffer(struct GNUNET_IDENTITY_PublicKey *key, const void *buffer, size_t len)
Reads a GNUNET_IDENTITY_PublicKey from a compact buffer.
Definition: identity_api.c:994
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.
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
GNUNET_MESSENGER_MessageFlags
Enum for the different supported flags used by message handling.
struct GNUNET_MessageHeader header
static const int key_length
Fixed size of the public/private keys.
Definition: gnunet-abd.c:211
const char * GNUNET_MESSENGER_name_of_kind(enum GNUNET_MESSENGER_MessageKind kind)
Get the name of a message kind.
Definition: messenger_api.c:35
A 512-bit hashcode.
struct GNUNET_HashCode key
The key used in the DHT.
int send_handle_message(struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_HashCode *key, const struct GNUNET_MESSENGER_Message *message)
Sends a message from a given handle to the room using a specific key.
An identity key as per LSD0001.
#define GNUNET_log(kind,...)
int encrypt_message(struct GNUNET_MESSENGER_Message *message, const struct GNUNET_IDENTITY_PublicKey *key)
Encrypts a message using a given public key and replaces its body and kind with the now private encry...
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2244
struct GNUNET_MESSENGER_SrvHandle * handle
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◆ callback_found_message()

static void callback_found_message ( void *  cls,
struct GNUNET_MESSENGER_SrvRoom room,
const struct GNUNET_MESSENGER_Message message,
const struct GNUNET_HashCode hash 
)
static

Definition at line 274 of file gnunet-service-messenger.c.

References create_message_request(), get_member_session_of(), get_room_key(), get_room_member_store(), get_store_member_of(), GNUNET_ERROR_TYPE_ERROR, GNUNET_h2s(), GNUNET_log, GNUNET_MESSENGER_Client::handle, notify_handle_message(), and send_room_message().

Referenced by handle_get_message().

277 {
278  struct GNUNET_MESSENGER_Client *msg_client = cls;
279 
280  if (!message)
281  {
282  send_room_message(room, msg_client->handle, create_message_request(hash));
283  return;
284  }
285 
287 
288  struct GNUNET_MESSENGER_Member *member = get_store_member_of(store, message);
289 
290  if (!member)
291  {
292  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Sender of message (%s) unknown!\n", GNUNET_h2s (hash));
293  return;
294  }
295 
296  struct GNUNET_MESSENGER_MemberSession *session = get_member_session_of(member, message, hash);
297 
298  if (session)
299  notify_handle_message (msg_client->handle, get_room_key(room), session, message, hash);
300 }
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
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.
struct GNUNET_MESSENGER_MemberStore * get_room_member_store(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the used member store of a given room.
struct GNUNET_MESSENGER_Message * create_message_request(const struct GNUNET_HashCode *hash)
Creates and allocates a new request message containing the hash of a missing message.
void notify_handle_message(struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_HashCode *key, const struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Notifies the handle that a new message was received or sent.
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.
#define GNUNET_log(kind,...)
const struct GNUNET_HashCode * get_room_key(const struct GNUNET_MESSENGER_SrvRoom *room)
Returns the shared secret you need to access a 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...
struct GNUNET_MESSENGER_SrvHandle * handle
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◆ handle_get_message()

static void handle_get_message ( void *  cls,
const struct GNUNET_MESSENGER_GetMessage msg 
)
static

Definition at line 303 of file gnunet-service-messenger.c.

References callback_found_message(), GNUNET_MESSENGER_Client::client, get_handle_ego(), get_handle_member_id(), get_member_session(), get_room_member_store(), get_service_room(), get_store_member(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_h2s(), GNUNET_log, GNUNET_SERVICE_client_continue(), GNUNET_MESSENGER_Client::handle, GNUNET_MESSENGER_GetMessage::hash, GNUNET_MESSENGER_GetMessage::key, GNUNET_MESSENGER_Ego::pub, and request_room_message().

304 {
305  struct GNUNET_MESSENGER_Client *msg_client = cls;
306 
307  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Requesting message from room: %s\n", GNUNET_h2s (&(msg->key)));
308 
309  struct GNUNET_MESSENGER_SrvRoom *room = get_service_room (messenger, &(msg->key));
310 
311  if (!room)
312  {
313  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Room not found: %s\n", GNUNET_h2s (&(msg->key)));
314  goto end_handling;
315  }
316 
317  struct GNUNET_MESSENGER_MemberStore *member_store = get_room_member_store(room);
318 
319  struct GNUNET_MESSENGER_Member *member = get_store_member(member_store, get_handle_member_id(
320  msg_client->handle, &(msg->key)
321  ));
322 
323  if (!member)
324  {
325  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Member not valid to request a message!\n");
326  goto end_handling;
327  }
328 
329  struct GNUNET_MESSENGER_MemberSession *session = get_member_session(member, &(get_handle_ego(msg_client->handle)->pub));
330 
331  if (!session)
332  {
333  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Session not valid to request a message!\n");
334  goto end_handling;
335  }
336 
337  request_room_message (room, &(msg->hash), session, callback_found_message, msg_client);
338 
339 end_handling:
341 }
struct GNUNET_MESSENGER_MemberSession * get_member_session(const struct GNUNET_MESSENGER_Member *member, const struct GNUNET_IDENTITY_PublicKey *public_key)
Returns the member session of a member identified by a given public key.
struct GNUNET_SERVICE_Client * client
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
struct GNUNET_MESSENGER_Service * messenger
struct GNUNET_MESSENGER_MemberStore * get_room_member_store(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the used member store of a given room.
struct GNUNET_MESSENGER_SrvRoom * get_service_room(const struct GNUNET_MESSENGER_Service *service, const struct GNUNET_HashCode *key)
Returns the room identified by a given key for a service.
int request_room_message(struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_HashCode *hash, const struct GNUNET_MESSENGER_MemberSession *session, GNUNET_MESSENGER_MessageRequestCallback callback, void *cls)
Requests a message from a room identified by a given hash.
struct GNUNET_IDENTITY_PublicKey pub
#define GNUNET_log(kind,...)
const struct GNUNET_ShortHashCode * get_handle_member_id(const struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_HashCode *key)
Returns the member id of a given handle in a specific room.
static void callback_found_message(void *cls, struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
struct GNUNET_MESSENGER_Member * get_store_member(const struct GNUNET_MESSENGER_MemberStore *store, const struct GNUNET_ShortHashCode *id)
Returns the member in a store identified by a given id.
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2244
struct GNUNET_MESSENGER_SrvHandle * handle
const struct GNUNET_MESSENGER_Ego * get_handle_ego(const struct GNUNET_MESSENGER_SrvHandle *handle)
Returns the EGO used by a given handle.
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◆ callback_client_connect()

static void* callback_client_connect ( void *  cls,
struct GNUNET_SERVICE_Client client,
struct GNUNET_MQ_Handle mq 
)
static

Definition at line 344 of file gnunet-service-messenger.c.

References add_service_handle(), GNUNET_MESSENGER_Client::client, GNUNET_new, and GNUNET_MESSENGER_Client::handle.

Referenced by run().

345 {
346  struct GNUNET_MESSENGER_Client *msg_client = GNUNET_new(struct GNUNET_MESSENGER_Client);
347 
348  msg_client->client = client;
349  msg_client->handle = add_service_handle (messenger, mq);
350 
351  return msg_client;
352 }
struct GNUNET_SERVICE_Client * client
#define GNUNET_new(type)
Allocate a struct or union of the given type.
struct GNUNET_MESSENGER_SrvHandle * add_service_handle(struct GNUNET_MESSENGER_Service *service, struct GNUNET_MQ_Handle *mq)
Creates and adds a new handle to a service using a given message queue.
struct GNUNET_MESSENGER_Service * messenger
struct GNUNET_MESSENGER_SrvHandle * handle
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◆ callback_client_disconnect()

static void callback_client_disconnect ( void *  cls,
struct GNUNET_SERVICE_Client client,
void *  internal_cls 
)
static

Definition at line 355 of file gnunet-service-messenger.c.

References GNUNET_free, GNUNET_MESSENGER_Client::handle, and remove_service_handle().

Referenced by run().

356 {
357  struct GNUNET_MESSENGER_Client *msg_client = internal_cls;
358 
359  remove_service_handle (messenger, msg_client->handle);
360 
361  GNUNET_free(msg_client);
362 }
struct GNUNET_MESSENGER_Service * messenger
void remove_service_handle(struct GNUNET_MESSENGER_Service *service, struct GNUNET_MESSENGER_SrvHandle *handle)
Removes a handle from a service and destroys it.
struct GNUNET_MESSENGER_SrvHandle * handle
#define GNUNET_free(ptr)
Wrapper around free.
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◆ run()

static void run ( void *  cls,
const struct GNUNET_CONFIGURATION_Handle config,
struct GNUNET_SERVICE_Handle service 
)
static

Setup MESSENGER internals.

Parameters

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

References callback_client_connect(), callback_client_disconnect(), create_service(), destroy(), get_message(), GNUNET_MESSAGE_TYPE_MESSENGER_CONNECTION_CREATE, GNUNET_MESSAGE_TYPE_MESSENGER_CONNECTION_DESTROY, GNUNET_MESSAGE_TYPE_MESSENGER_CONNECTION_SET_NAME, GNUNET_MESSAGE_TYPE_MESSENGER_CONNECTION_UPDATE, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_CLOSE, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_ENTRY, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_GET_MESSAGE, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_OPEN, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_SEND_MESSAGE, GNUNET_MESSENGER_SERVICE_NAME, GNUNET_MQ_handler_end, GNUNET_MQ_hd_fixed_size, GNUNET_MQ_hd_var_size, GNUNET_SCHEDULER_shutdown(), GNUNET_SERVICE_MAIN(), GNUNET_SERVICE_OPTION_NONE, and send_message().

373 {
374  messenger = create_service (config, service);
375 
376  if (!messenger)
378 }
void GNUNET_SCHEDULER_shutdown(void)
Request the shutdown of a scheduler.
Definition: scheduler.c:531
struct GNUNET_MESSENGER_Service * messenger
struct GNUNET_MESSENGER_Service * create_service(const struct GNUNET_CONFIGURATION_Handle *config, struct GNUNET_SERVICE_Handle *service_handle)
Creates and allocates a new service using a given config and a GNUnet service handle.
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◆ GNUNET_SERVICE_MAIN()

Define "main" method using service macro.

Referenced by run().

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Variable Documentation

◆ messenger

struct GNUNET_MESSENGER_Service* messenger

Definition at line 39 of file gnunet-service-messenger.c.