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

GNUnet MESSENGER service. More...

#include "gnunet-service-messenger_member_session.h"
#include "gnunet-service-messenger_room.h"
#include "gnunet-service-messenger_message_store.h"
#include "messenger_api_contact_store.h"
Include dependency graph for gnunet-service-messenger_member_session.c:

Go to the source code of this file.

Data Structures

struct  GNUNET_MESSENGER_MemberSessionHistoryEntry
 

Functions

struct GNUNET_MESSENGER_MemberSessioncreate_member_session (struct GNUNET_MESSENGER_Member *member, const struct GNUNET_IDENTITY_PublicKey *pubkey)
 Creates and allocates a new member session of a member with a given public key. More...
 
static void check_member_session_completion (struct GNUNET_MESSENGER_MemberSession *session)
 
static int iterate_copy_history (void *cls, const struct GNUNET_HashCode *key, void *value)
 
struct GNUNET_MESSENGER_MemberSessionswitch_member_session (struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
 Creates and allocates a new member session closing and replacing a given other session of the same member. More...
 
void destroy_member_session (struct GNUNET_MESSENGER_MemberSession *session)
 Destroys a member session and frees its memory fully. More...
 
int reset_member_session (struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_HashCode *hash)
 Resets a given member session which re-opens a member session for new usage. More...
 
void close_member_session (struct GNUNET_MESSENGER_MemberSession *session)
 Closes a given member session which opens the request for completion of the given member session. More...
 
int is_member_session_closed (const struct GNUNET_MESSENGER_MemberSession *session)
 Returns if the given member session has been closed. More...
 
int is_member_session_completed (const struct GNUNET_MESSENGER_MemberSession *session)
 Returns if the given member session has been completed. More...
 
struct GNUNET_TIME_Absolute get_member_session_start (const struct GNUNET_MESSENGER_MemberSession *session)
 Returns the timestamp of the member session's start. More...
 
const struct GNUNET_HashCodeget_member_session_key (const struct GNUNET_MESSENGER_MemberSession *session)
 Returns the key of the room a given member session belongs to. More...
 
const struct GNUNET_ShortHashCodeget_member_session_id (const struct GNUNET_MESSENGER_MemberSession *session)
 Returns the member id of a given member session. More...
 
const struct GNUNET_IDENTITY_PublicKeyget_member_session_public_key (const struct GNUNET_MESSENGER_MemberSession *session)
 Returns the public key from an EGO of a given member session. More...
 
const struct GNUNET_HashCodeget_member_session_context (const struct GNUNET_MESSENGER_MemberSession *session)
 Returns the member context of a given member session. More...
 
struct GNUNET_MESSENGER_Contactget_member_session_contact (struct GNUNET_MESSENGER_MemberSession *session)
 Returns the contact which is connected to a given member session. More...
 
int verify_member_session_as_sender (const struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
 Verifies a given member session as sender of a selected message and its hash. More...
 
int check_member_session_history (const struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_HashCode *hash, int ownership)
 Checks the history of a session for a specific message which is identified by its hash and if the ownership flag is set, if the message is owned by the sessions contact. More...
 
static void update_member_chain_history (struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_HashCode *hash, int ownership)
 
void update_member_session_history (struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
 Adds a given message to the history of a session using the messages hash. More...
 
static void clear_member_chain_history (struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_HashCode *hash)
 
void clear_member_session_history (struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_HashCode *hash)
 Removes a message from the history of a session using the messages hash. More...
 
static void load_member_session_history (struct GNUNET_MESSENGER_MemberSession *session, const char *path)
 
void load_member_session (struct GNUNET_MESSENGER_Member *member, const char *directory)
 Loads data from a directory into a new allocated and created member session of a member if the required information can be read from the content of the given directory. More...
 
static struct GNUNET_MESSENGER_MemberSessionget_cycle_safe_next_session (struct GNUNET_MESSENGER_MemberSession *session, struct GNUNET_MESSENGER_MemberSession *next)
 
void load_member_session_next (struct GNUNET_MESSENGER_MemberSession *session, const char *directory)
 Loads the connection from one session to another through the next attribute. More...
 
static int iterate_save_member_session_history_hentries (void *cls, const struct GNUNET_HashCode *key, void *value)
 
static void save_member_session_history (struct GNUNET_MESSENGER_MemberSession *session, const char *path)
 
void save_member_session (struct GNUNET_MESSENGER_MemberSession *session, const char *directory)
 Saves data from a member session into a directory which can be load to restore the member session completely. More...
 

Detailed Description

GNUnet MESSENGER service.

Author
Tobias Frisch

Definition in file gnunet-service-messenger_member_session.c.

Function Documentation

◆ create_member_session()

struct GNUNET_MESSENGER_MemberSession* create_member_session ( struct GNUNET_MESSENGER_Member member,
const struct GNUNET_IDENTITY_PublicKey pubkey 
)

Creates and allocates a new member session of a member with a given public key.

If the creation fails, NULL gets returned.

Parameters
[in/out]member Member
[in]pubkeyPublic key of EGO
Returns
New member session

Definition at line 34 of file gnunet-service-messenger_member_session.c.

36 {
37  if ((!member) || (!pubkey) || (!(member->store)))
38  return NULL;
39 
41  session->member = member;
42 
43  GNUNET_memcpy(&(session->public_key), pubkey, sizeof(session->public_key));
44 
46  get_member_session_key (session),
47  get_member_session_id (session),
48  &(session->context)
49  );
50 
52 
53  session->contact = get_store_contact(
54  store,
57  );
58 
59  if (!(session->contact))
60  {
61  GNUNET_free(session);
62  return NULL;
63  }
64 
65  increase_contact_rc (session->contact);
66 
68 
69  init_list_messages(&(session->messages));
70 
71  session->prev = NULL;
72  session->next = NULL;
73 
74  session->start = GNUNET_TIME_absolute_get();
75 
76  session->closed = GNUNET_NO;
77  session->completed = GNUNET_NO;
78 
79  return session;
80 }
static struct GNUNET_IDENTITY_PublicKey pubkey
Public key of the zone to look in.
void init_list_messages(struct GNUNET_MESSENGER_ListMessages *messages)
Initializes list of message hashes as empty list.
const struct GNUNET_HashCode * get_member_session_key(const struct GNUNET_MESSENGER_MemberSession *session)
Returns the key of the room a given member session belongs to.
const struct GNUNET_ShortHashCode * get_member_session_id(const struct GNUNET_MESSENGER_MemberSession *session)
Returns the member id of a given member session.
const struct GNUNET_HashCode * get_member_session_context(const struct GNUNET_MESSENGER_MemberSession *session)
Returns the member context of a given member session.
const struct GNUNET_IDENTITY_PublicKey * get_member_session_public_key(const struct GNUNET_MESSENGER_MemberSession *session)
Returns the public key from an EGO of a given member session.
struct GNUNET_MESSENGER_ContactStore * get_member_contact_store(struct GNUNET_MESSENGER_MemberStore *store)
Returns the used contact store of a given member store.
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
@ GNUNET_NO
Definition: gnunet_common.h:94
struct GNUNET_CONTAINER_MultiHashMap * GNUNET_CONTAINER_multihashmap_create(unsigned int len, int do_not_copy_keys)
Create a multi hash map.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
#define GNUNET_free(ptr)
Wrapper around free.
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_get(void)
Get the current time.
Definition: time.c:86
void increase_contact_rc(struct GNUNET_MESSENGER_Contact *contact)
Increases the reference counter of a given contact which is zero as default.
void get_context_from_member(const struct GNUNET_HashCode *key, const struct GNUNET_ShortHashCode *id, struct GNUNET_HashCode *context)
Calculates the context hash of a member in a room and returns it.
struct GNUNET_MESSENGER_Contact * get_store_contact(struct GNUNET_MESSENGER_ContactStore *store, const struct GNUNET_HashCode *context, const struct GNUNET_IDENTITY_PublicKey *pubkey)
Returns a contact using a specific public key.
struct GNUNET_CONTAINER_MultiHashMap * history
struct GNUNET_MESSENGER_MemberSession * prev
struct GNUNET_MESSENGER_MemberSession * next
struct GNUNET_MESSENGER_ListMessages messages
struct GNUNET_MESSENGER_MemberStore * store

References GNUNET_MESSENGER_MemberSession::closed, GNUNET_MESSENGER_MemberSession::completed, GNUNET_MESSENGER_MemberSession::contact, GNUNET_MESSENGER_MemberSession::context, get_context_from_member(), get_member_contact_store(), get_member_session_context(), get_member_session_id(), get_member_session_key(), get_member_session_public_key(), get_store_contact(), GNUNET_CONTAINER_multihashmap_create(), GNUNET_free, GNUNET_memcpy, GNUNET_new, GNUNET_NO, GNUNET_TIME_absolute_get(), GNUNET_MESSENGER_MemberSession::history, increase_contact_rc(), init_list_messages(), GNUNET_MESSENGER_MemberSession::member, GNUNET_MESSENGER_MemberSession::messages, GNUNET_MESSENGER_MemberSession::next, GNUNET_MESSENGER_MemberSession::prev, pubkey, GNUNET_MESSENGER_MemberSession::public_key, GNUNET_MESSENGER_MemberSession::start, and GNUNET_MESSENGER_Member::store.

Referenced by load_member_session(), and try_member_session().

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◆ check_member_session_completion()

static void check_member_session_completion ( struct GNUNET_MESSENGER_MemberSession session)
static

Definition at line 83 of file gnunet-service-messenger_member_session.c.

84 {
85  GNUNET_assert (session);
86 
87  if (!session->messages.tail)
88  {
89  session->completed = GNUNET_YES;
90  goto completion;
91  }
92 
93  const struct GNUNET_HashCode* start = &(session->messages.head->hash);
94  const struct GNUNET_HashCode* end = &(session->messages.tail->hash);
95 
96  struct GNUNET_MESSENGER_ListMessages level;
97  init_list_messages(&level);
98 
99  add_to_list_messages(&level, end);
100 
102 
105 
106  while (level.head)
107  {
108  struct GNUNET_MESSENGER_ListMessage *element;
109 
110  for (element = level.head; element; element = element->next)
111  {
113  store, &(element->hash), GNUNET_NO
114  );
115 
116  if (!link)
117  continue;
118 
119  add_to_list_messages(&list, &(link->first));
120 
121  if (GNUNET_YES == link->multiple)
122  add_to_list_messages(&list, &(link->second));
123  }
124 
125  clear_list_messages(&level);
126 
127  for (element = list.head; element; element = element->next)
128  if (GNUNET_YES == check_member_session_history(session, &(element->hash), GNUNET_YES))
129  break;
130 
131  if (element)
132  if (0 != GNUNET_CRYPTO_hash_cmp(&(element->hash), start))
133  add_to_list_messages(&level, &(element->hash));
134  else
135  session->completed = GNUNET_YES;
136  else
137  copy_list_messages(&level, &list);
138 
140  }
141 
142 completion:
143  if (GNUNET_YES == is_member_session_completed(session))
144  {
146 
148 
149  if ((session->contact) && (GNUNET_YES == decrease_contact_rc (session->contact)))
151  store,
152  session->contact,
154  );
155 
156  session->contact = NULL;
157  }
158 }
static int start
Set if we are to start default services (including ARM).
Definition: gnunet-arm.c:39
static int list
Set if we should print a list of currently running services.
Definition: gnunet-arm.c:69
static int end
Set if we are to shutdown all services (including ARM).
Definition: gnunet-arm.c:34
void clear_list_messages(struct GNUNET_MESSENGER_ListMessages *messages)
Clears the list of message hashes.
void copy_list_messages(struct GNUNET_MESSENGER_ListMessages *messages, const struct GNUNET_MESSENGER_ListMessages *origin)
Copies all message hashes from an origin to another list.
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.
int check_member_session_history(const struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_HashCode *hash, int ownership)
Checks the history of a session for a specific message which is identified by its hash and if the own...
int is_member_session_completed(const struct GNUNET_MESSENGER_MemberSession *session)
Returns if the given member session has been completed.
const struct GNUNET_MESSENGER_MessageLink * get_store_message_link(struct GNUNET_MESSENGER_MessageStore *store, const struct GNUNET_HashCode *hash, int deleted_only)
Returns the message link from a message store matching a given hash.
struct GNUNET_MESSENGER_MessageStore * get_room_message_store(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the used message store of a given room.
@ GNUNET_YES
Definition: gnunet_common.h:97
int GNUNET_CRYPTO_hash_cmp(const struct GNUNET_HashCode *h1, const struct GNUNET_HashCode *h2)
Compare function for HashCodes, producing a total ordering of all hashcodes.
Definition: crypto_hash.c:201
void GNUNET_CONTAINER_multihashmap_destroy(struct GNUNET_CONTAINER_MultiHashMap *map)
Destroy a hash map.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
int decrease_contact_rc(struct GNUNET_MESSENGER_Contact *contact)
Decreases the reference counter if possible (can not underflow!) of a given contact and returns GNUNE...
void remove_store_contact(struct GNUNET_MESSENGER_ContactStore *store, struct GNUNET_MESSENGER_Contact *contact, const struct GNUNET_HashCode *context)
Removes a contact from the store which uses a given member context.
A 512-bit hashcode.
struct GNUNET_MESSENGER_ListMessage * next
struct GNUNET_MESSENGER_ListMessage * head
struct GNUNET_MESSENGER_ListMessage * tail

References add_to_list_messages(), check_member_session_history(), clear_list_messages(), GNUNET_MESSENGER_MemberSession::completed, GNUNET_MESSENGER_MemberSession::contact, copy_list_messages(), decrease_contact_rc(), end, GNUNET_MESSENGER_MessageLink::first, get_member_contact_store(), get_member_session_context(), get_room_message_store(), get_store_message_link(), GNUNET_assert, GNUNET_CONTAINER_multihashmap_destroy(), GNUNET_CRYPTO_hash_cmp(), GNUNET_NO, GNUNET_YES, GNUNET_MESSENGER_ListMessage::hash, GNUNET_MESSENGER_ListMessages::head, GNUNET_MESSENGER_MemberSession::history, init_list_messages(), is_member_session_completed(), list, GNUNET_MESSENGER_MemberSession::member, GNUNET_MESSENGER_MemberSession::messages, GNUNET_MESSENGER_MessageLink::multiple, GNUNET_MESSENGER_ListMessage::next, remove_store_contact(), GNUNET_MESSENGER_MemberStore::room, GNUNET_MESSENGER_MessageLink::second, start, GNUNET_MESSENGER_Member::store, and GNUNET_MESSENGER_ListMessages::tail.

Referenced by close_member_session(), switch_member_session(), and update_member_session_history().

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◆ iterate_copy_history()

static int iterate_copy_history ( void *  cls,
const struct GNUNET_HashCode key,
void *  value 
)
static

Definition at line 161 of file gnunet-service-messenger_member_session.c.

164 {
165  struct GNUNET_MESSENGER_MemberSession *next = cls;
166 
169 
170  return GNUNET_YES;
171 }
struct GNUNET_HashCode key
The key used in the DHT.
static char * value
Value of the record to add/remove.
int GNUNET_CONTAINER_multihashmap_put(struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
@ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST
, ' bother checking if a value already exists (faster than GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE...

References GNUNET_CONTAINER_multihashmap_put(), GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST, GNUNET_YES, GNUNET_MESSENGER_MemberSession::history, key, GNUNET_MESSENGER_MemberSession::next, and value.

Referenced by switch_member_session().

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◆ switch_member_session()

struct GNUNET_MESSENGER_MemberSession* switch_member_session ( struct GNUNET_MESSENGER_MemberSession session,
const struct GNUNET_MESSENGER_Message message,
const struct GNUNET_HashCode hash 
)

Creates and allocates a new member session closing and replacing a given other session of the same member.

The new session could have significant changes to the members public key or its member id depending on the used message to switch session. The new session will be linked to the old one.

Parameters
[in/out]session Old member session
[in]messageMessage
[in]hashHash of message
Returns
New member session

Definition at line 174 of file gnunet-service-messenger_member_session.c.

177 {
178  if ((!session) || (!message) || (!hash))
179  return NULL;
180 
182  (GNUNET_MESSENGER_KIND_KEY == message->header.kind));
183 
185 
186  if (GNUNET_MESSENGER_KIND_ID == message->header.kind)
187  next->member = add_store_member(session->member->store, &(message->body.id.id));
188  else
189  next->member = session->member;
190 
191  if (GNUNET_MESSENGER_KIND_KEY == message->header.kind)
192  GNUNET_memcpy(&(next->public_key), &(message->body.key.key), sizeof(next->public_key));
193  else
195 
199  &(next->context)
200  );
201 
208  );
209 
211 
212  if (!(next->contact))
213  {
214  GNUNET_free(next);
215  return NULL;
216  }
217 
219 
222  );
223 
225 
227  copy_list_messages(&(next->messages), &(session->messages));
228 
229  session->next = next;
230  next->prev = session;
231  next->next = NULL;
232 
234 
235  session->closed = GNUNET_YES;
236  next->closed = GNUNET_NO;
238 
240 
241  return next;
242 }
static int iterate_copy_history(void *cls, const struct GNUNET_HashCode *key, void *value)
static void check_member_session_completion(struct GNUNET_MESSENGER_MemberSession *session)
struct GNUNET_MESSENGER_Contact * get_member_session_contact(struct GNUNET_MESSENGER_MemberSession *session)
Returns the contact which is connected to a given member session.
struct GNUNET_MESSENGER_Member * add_store_member(struct GNUNET_MESSENGER_MemberStore *store, const struct GNUNET_ShortHashCode *id)
Adds a member to a store under a specific id and returns it on success.
unsigned int GNUNET_CONTAINER_multihashmap_size(const struct GNUNET_CONTAINER_MultiHashMap *map)
Get the number of key-value pairs in the map.
int GNUNET_CONTAINER_multihashmap_iterate(struct GNUNET_CONTAINER_MultiHashMap *map, GNUNET_CONTAINER_MulitHashMapIteratorCallback it, void *it_cls)
Iterate over all entries in the map.
@ GNUNET_MESSENGER_KIND_KEY
The key kind.
@ GNUNET_MESSENGER_KIND_ID
The id kind.
void update_store_contact(struct GNUNET_MESSENGER_ContactStore *store, struct GNUNET_MESSENGER_Contact *contact, const struct GNUNET_HashCode *context, const struct GNUNET_HashCode *next_context, const struct GNUNET_IDENTITY_PublicKey *pubkey)
Moves a contact from the store to another location matching a given public key and member context.
struct GNUNET_MESSENGER_MessageId id
struct GNUNET_MESSENGER_MessageKey key
enum GNUNET_MESSENGER_MessageKind kind
The kind of the message.
struct GNUNET_ShortHashCode id
The new id which will replace the senders id in a room.
struct GNUNET_IDENTITY_PublicKey key
The new public key which replaces the current senders public key.
struct GNUNET_MESSENGER_MessageHeader header
Header.
struct GNUNET_MESSENGER_MessageBody body
Body.

References add_store_member(), GNUNET_MESSENGER_Message::body, check_member_session_completion(), GNUNET_MESSENGER_MemberSession::closed, GNUNET_MESSENGER_MemberSession::completed, GNUNET_MESSENGER_MemberSession::contact, GNUNET_MESSENGER_MemberSession::context, copy_list_messages(), get_context_from_member(), get_member_contact_store(), get_member_session_contact(), get_member_session_context(), get_member_session_id(), get_member_session_key(), get_member_session_public_key(), GNUNET_assert, GNUNET_CONTAINER_multihashmap_create(), GNUNET_CONTAINER_multihashmap_iterate(), GNUNET_CONTAINER_multihashmap_size(), GNUNET_free, GNUNET_memcpy, GNUNET_MESSENGER_KIND_ID, GNUNET_MESSENGER_KIND_KEY, GNUNET_new, GNUNET_NO, GNUNET_TIME_absolute_get(), GNUNET_YES, GNUNET_MESSENGER_Message::header, GNUNET_MESSENGER_MemberSession::history, GNUNET_MESSENGER_MessageId::id, GNUNET_MESSENGER_MessageBody::id, increase_contact_rc(), init_list_messages(), iterate_copy_history(), GNUNET_MESSENGER_MessageKey::key, GNUNET_MESSENGER_MessageBody::key, GNUNET_MESSENGER_MessageHeader::kind, GNUNET_MESSENGER_MemberSession::member, GNUNET_MESSENGER_MemberSession::messages, GNUNET_MESSENGER_MemberSession::next, GNUNET_MESSENGER_MemberSession::prev, GNUNET_MESSENGER_MemberSession::public_key, GNUNET_MESSENGER_MemberSession::start, GNUNET_MESSENGER_Member::store, and update_store_contact().

Referenced by handle_session_switch().

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◆ destroy_member_session()

void destroy_member_session ( struct GNUNET_MESSENGER_MemberSession session)

Destroys a member session and frees its memory fully.

Parameters
[in/out]session Member session

Definition at line 245 of file gnunet-service-messenger_member_session.c.

246 {
247  GNUNET_assert (session);
248 
250 
251  clear_list_messages (&(session->messages));
252 
253  struct GNUNET_MESSENGER_Contact *contact = get_member_session_contact (session);
254 
255  if ((contact) && (GNUNET_YES == decrease_contact_rc (contact)))
258  contact,
260  );
261 
262  GNUNET_free(session);
263 }

References clear_list_messages(), decrease_contact_rc(), get_member_contact_store(), get_member_session_contact(), get_member_session_context(), GNUNET_assert, GNUNET_CONTAINER_multihashmap_destroy(), GNUNET_free, GNUNET_YES, GNUNET_MESSENGER_MemberSession::history, GNUNET_MESSENGER_MemberSession::member, GNUNET_MESSENGER_MemberSession::messages, remove_store_contact(), and GNUNET_MESSENGER_Member::store.

Referenced by iterate_destroy_session(), and remove_room_member_session().

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◆ reset_member_session()

int reset_member_session ( struct GNUNET_MESSENGER_MemberSession session,
const struct GNUNET_HashCode hash 
)

Resets a given member session which re-opens a member session for new usage.

Every connection to other sessions will be be dropped. The member sessions messages will be cleared but old history from uncompleted sessions however can be reused!

Parameters
[in/out]session Member session
[in]hashHash of initial message (JOIN message!)
Returns
GNUNET_OK on success, GNUNET_SYSERR otherwise

Definition at line 266 of file gnunet-service-messenger_member_session.c.

268 {
269  GNUNET_assert ((session) && (hash));
270 
273  store,
274  get_member_session_context (session),
276  );
277 
278  if (!contact)
279  return GNUNET_SYSERR;
280 
281  if (contact == session->contact)
282  goto clear_messages;
283 
284  session->contact = contact;
285  increase_contact_rc (session->contact);
286 
287 clear_messages:
288  clear_list_messages(&(session->messages));
289  add_to_list_messages(&(session->messages), hash);
290 
291  session->next = NULL;
292  session->closed = GNUNET_NO;
293  session->completed = GNUNET_NO;
294 
295  return GNUNET_OK;
296 }
@ GNUNET_OK
Definition: gnunet_common.h:95
@ GNUNET_SYSERR
Definition: gnunet_common.h:93

References add_to_list_messages(), clear_list_messages(), GNUNET_MESSENGER_MemberSession::closed, GNUNET_MESSENGER_MemberSession::completed, GNUNET_MESSENGER_MemberSession::contact, get_member_contact_store(), get_member_session_context(), get_member_session_public_key(), get_store_contact(), GNUNET_assert, GNUNET_NO, GNUNET_OK, GNUNET_SYSERR, increase_contact_rc(), GNUNET_MESSENGER_MemberSession::member, GNUNET_MESSENGER_MemberSession::messages, GNUNET_MESSENGER_MemberSession::next, and GNUNET_MESSENGER_Member::store.

Referenced by handle_message_join().

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◆ close_member_session()

void close_member_session ( struct GNUNET_MESSENGER_MemberSession session)

Closes a given member session which opens the request for completion of the given member session.

Closing a session may complete a session and can't be used without a reset! (

See also
reset_member_session() )
Parameters
[in/out]session Member session

Definition at line 299 of file gnunet-service-messenger_member_session.c.

300 {
301  GNUNET_assert (session);
302 
303  session->closed = GNUNET_YES;
305 }

References check_member_session_completion(), GNUNET_MESSENGER_MemberSession::closed, GNUNET_assert, and GNUNET_YES.

Referenced by handle_message_leave().

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◆ is_member_session_closed()

int is_member_session_closed ( const struct GNUNET_MESSENGER_MemberSession session)

Returns if the given member session has been closed.

Parameters
[in]sessionMember session
Returns
GNUNET_YES or GNUNET_NO

Definition at line 308 of file gnunet-service-messenger_member_session.c.

309 {
310  GNUNET_assert(session);
311 
312  return session->closed;
313 }

References GNUNET_MESSENGER_MemberSession::closed, and GNUNET_assert.

Referenced by check_room_peer_status().

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◆ is_member_session_completed()

int is_member_session_completed ( const struct GNUNET_MESSENGER_MemberSession session)

Returns if the given member session has been completed.

A completed member session can't verify any message as its own and it won't add any message to its history.

Parameters
[in]sessionMember session
Returns
GNUNET_YES or GNUNET_NO

Definition at line 316 of file gnunet-service-messenger_member_session.c.

317 {
318  GNUNET_assert(session);
319 
320  return session->completed;
321 }

Referenced by check_member_session_completion(), iterate_forward_members(), iterate_notify_about_members(), iterate_update_member_sessions(), update_member_session_history(), and verify_member_session_as_sender().

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◆ get_member_session_start()

struct GNUNET_TIME_Absolute get_member_session_start ( const struct GNUNET_MESSENGER_MemberSession session)

Returns the timestamp of the member session's start.

Parameters
[in]sessionMember session
Returns
Absolute timestamp

Definition at line 316 of file gnunet-service-messenger_member_session.c.

325 {
326  GNUNET_assert(session);
327 
328  if (session->prev)
329  return get_member_session_start(session->prev);
330 
331  return session->start;
332 }
struct GNUNET_TIME_Absolute get_member_session_start(const struct GNUNET_MESSENGER_MemberSession *session)
Returns the timestamp of the member session's start.

References GNUNET_MESSENGER_MemberSession::completed, and GNUNET_assert.

Referenced by solve_room_member_collisions().

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◆ get_member_session_key()

const struct GNUNET_HashCode* get_member_session_key ( const struct GNUNET_MESSENGER_MemberSession session)

Returns the key of the room a given member session belongs to.

Parameters
[in]sessionMember session
Returns
Key of room

Definition at line 335 of file gnunet-service-messenger_member_session.c.

336 {
337  GNUNET_assert((session) && (session->member));
338 
339  return get_member_store_key(session->member->store);
340 }
const struct GNUNET_HashCode * get_member_store_key(const struct GNUNET_MESSENGER_MemberStore *store)
Returns the shared secret you need to access a room of the store.

References get_member_store_key(), GNUNET_assert, GNUNET_MESSENGER_MemberSession::member, and GNUNET_MESSENGER_Member::store.

Referenced by create_member_session(), and switch_member_session().

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◆ get_member_session_id()

const struct GNUNET_ShortHashCode* get_member_session_id ( const struct GNUNET_MESSENGER_MemberSession session)

Returns the member id of a given member session.

Parameters
[in]sessionMember session
Returns
Member id

Definition at line 343 of file gnunet-service-messenger_member_session.c.

344 {
345  GNUNET_assert(session);
346 
347  return get_member_id(session->member);
348 }
const struct GNUNET_ShortHashCode * get_member_id(const struct GNUNET_MESSENGER_Member *member)
Returns the current id of a given member.

References get_member_id(), GNUNET_assert, and GNUNET_MESSENGER_MemberSession::member.

Referenced by create_member_session(), delete_room_message(), remove_room_member_session(), switch_member_session(), update_member_session_history(), and verify_member_session_as_sender().

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◆ get_member_session_public_key()

const struct GNUNET_IDENTITY_PublicKey* get_member_session_public_key ( const struct GNUNET_MESSENGER_MemberSession session)

Returns the public key from an EGO of a given member session.

Parameters
[in]sessionMember session
Returns
Public key of EGO

Definition at line 351 of file gnunet-service-messenger_member_session.c.

352 {
353  GNUNET_assert(session);
354 
355  return &(session->public_key);
356 }

References GNUNET_assert, and GNUNET_MESSENGER_MemberSession::public_key.

Referenced by add_member_session(), create_member_session(), handle_message_id(), iterate_member_sessions_it(), remove_member_session(), remove_room_member_session(), reset_member_session(), switch_member_session(), and verify_member_session_as_sender().

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◆ get_member_session_context()

const struct GNUNET_HashCode* get_member_session_context ( const struct GNUNET_MESSENGER_MemberSession session)

Returns the member context of a given member session.

Parameters
[in]sessionMember session
Returns
Member context as hash

Definition at line 359 of file gnunet-service-messenger_member_session.c.

360 {
361  GNUNET_assert(session);
362 
363  return &(session->context);
364 }

References GNUNET_MESSENGER_MemberSession::context, and GNUNET_assert.

Referenced by check_member_session_completion(), create_member_session(), destroy_member_session(), get_next_member_session_contect(), reset_member_session(), and switch_member_session().

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◆ get_member_session_contact()

struct GNUNET_MESSENGER_Contact* get_member_session_contact ( struct GNUNET_MESSENGER_MemberSession session)

Returns the contact which is connected to a given member session.

Parameters
[in]sessionMember session
Returns
Contact

Definition at line 367 of file gnunet-service-messenger_member_session.c.

368 {
369  GNUNET_assert (session);
370 
371  return session->contact;
372 }

References GNUNET_MESSENGER_MemberSession::contact, and GNUNET_assert.

Referenced by destroy_member_session(), handle_message_name(), and switch_member_session().

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◆ verify_member_session_as_sender()

int verify_member_session_as_sender ( const struct GNUNET_MESSENGER_MemberSession session,
const struct GNUNET_MESSENGER_Message message,
const struct GNUNET_HashCode hash 
)

Verifies a given member session as sender of a selected message and its hash.

The function returns GNUNET_OK if the message session is verified as sender, otherwise GNUNET_SYSERR.

See also
is_member_session_completed() for verification.
Parameters
[in]sessionMember session
[in]messageMessage
[in]hashHash of message
Returns
GNUNET_OK on success, otherwise GNUNET_SYSERR

Definition at line 374 of file gnunet-service-messenger_member_session.c.

377 {
378  GNUNET_assert((session) && (message) && (hash));
379 
380  if (GNUNET_YES == is_member_session_completed(session))
381  return GNUNET_SYSERR;
382 
383  if (0 != GNUNET_memcmp(get_member_session_id(session), &(message->header.sender_id)))
384  return GNUNET_SYSERR;
385 
386  return verify_message(message, hash, get_member_session_public_key(session));
387 }
#define GNUNET_memcmp(a, b)
Compare memory in a and b, where both must be of the same pointer type.
int verify_message(const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash, const struct GNUNET_IDENTITY_PublicKey *key)
Verifies the signature of a given message and its hash with a specific public key.
struct GNUNET_ShortHashCode sender_id
The senders id inside of the room the message was sent in.

References get_member_session_id(), get_member_session_public_key(), GNUNET_assert, GNUNET_memcmp, GNUNET_SYSERR, GNUNET_YES, GNUNET_MESSENGER_Message::header, is_member_session_completed(), GNUNET_MESSENGER_MessageHeader::sender_id, and verify_message().

Referenced by iterate_search_session(), and update_member_session_history().

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◆ check_member_session_history()

int check_member_session_history ( const struct GNUNET_MESSENGER_MemberSession session,
const struct GNUNET_HashCode hash,
int  ownership 
)

Checks the history of a session for a specific message which is identified by its hash and if the ownership flag is set, if the message is owned by the sessions contact.

Parameters
[in]sessionMember session
[in]hashHash of message
[in]ownershipOwnership flag
Returns
GNUNET_YES if found, otherwise GNUNET_NO

Definition at line 390 of file gnunet-service-messenger_member_session.c.

392 {
393  GNUNET_assert((session) && (hash));
394 
395  if (GNUNET_YES == ownership)
396  return (NULL != GNUNET_CONTAINER_multihashmap_get(session->history, hash)? GNUNET_YES : GNUNET_NO);
397  else
398  return GNUNET_CONTAINER_multihashmap_contains(session->history, hash);
399 }
int GNUNET_CONTAINER_multihashmap_contains(const struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key)
Check if the map contains any value under the given key (including values that are NULL).
void * GNUNET_CONTAINER_multihashmap_get(const struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key)
Given a key find a value in the map matching the key.

References GNUNET_assert, GNUNET_CONTAINER_multihashmap_contains(), GNUNET_CONTAINER_multihashmap_get(), GNUNET_NO, GNUNET_YES, and GNUNET_MESSENGER_MemberSession::history.

Referenced by check_member_session_completion(), delete_room_message(), notify_about_members(), recv_message_request(), and request_room_message_step().

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◆ update_member_chain_history()

static void update_member_chain_history ( struct GNUNET_MESSENGER_MemberSession session,
const struct GNUNET_HashCode hash,
int  ownership 
)
static

Definition at line 402 of file gnunet-service-messenger_member_session.c.

404 {
405  GNUNET_assert ((session) && (hash));
406 
407  if ((GNUNET_OK == GNUNET_CONTAINER_multihashmap_put(session->history, hash, (GNUNET_YES == ownership? session : NULL),
409  update_member_chain_history (session->next, hash, ownership);
410 }
static void update_member_chain_history(struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_HashCode *hash, int ownership)

References GNUNET_assert, GNUNET_CONTAINER_multihashmap_put(), GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST, GNUNET_OK, GNUNET_YES, GNUNET_MESSENGER_MemberSession::history, and GNUNET_MESSENGER_MemberSession::next.

Referenced by update_member_session_history().

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◆ update_member_session_history()

void update_member_session_history ( struct GNUNET_MESSENGER_MemberSession session,
const struct GNUNET_MESSENGER_Message message,
const struct GNUNET_HashCode hash 
)

Adds a given message to the history of a session using the messages hash.

The ownership will be set automatically.

See also
is_member_session_completed() for updating a history.
Parameters
[in/out]session Member session
[in]messageMessage
[in]hashHash of message

Definition at line 413 of file gnunet-service-messenger_member_session.c.

416 {
417  GNUNET_assert((session) && (message) && (hash));
418 
419  if (GNUNET_YES == is_member_session_completed(session))
420  return;
421 
422  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Updating sessions history (%s) += (%s)\n",
423  GNUNET_sh2s(get_member_session_id(session)), GNUNET_h2s(hash));
424 
425  if (GNUNET_OK == verify_member_session_as_sender (session, message, hash))
426  {
427  if (GNUNET_YES == is_message_session_bound (message))
428  add_to_list_messages(&(session->messages), hash);
429 
430  update_member_chain_history (session, hash, GNUNET_YES);
431  }
432  else
433  update_member_chain_history (session, hash, GNUNET_NO);
434 
435  if (GNUNET_YES == session->closed)
437 }
int verify_member_session_as_sender(const struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Verifies a given member session as sender of a selected message and its hash.
#define GNUNET_log(kind,...)
const char * GNUNET_sh2s(const struct GNUNET_ShortHashCode *shc)
Convert a short hash value to a string (for printing debug messages).
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
@ GNUNET_ERROR_TYPE_DEBUG
int is_message_session_bound(const struct GNUNET_MESSENGER_Message *message)
Returns if the message should be bound to a member session.

References add_to_list_messages(), check_member_session_completion(), GNUNET_MESSENGER_MemberSession::closed, get_member_session_id(), GNUNET_assert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_h2s(), GNUNET_log, GNUNET_NO, GNUNET_OK, GNUNET_sh2s(), GNUNET_YES, is_member_session_completed(), is_message_session_bound(), GNUNET_MESSENGER_MemberSession::messages, update_member_chain_history(), and verify_member_session_as_sender().

Referenced by iterate_update_member_sessions().

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◆ clear_member_chain_history()

static void clear_member_chain_history ( struct GNUNET_MESSENGER_MemberSession session,
const struct GNUNET_HashCode hash 
)
static

Definition at line 440 of file gnunet-service-messenger_member_session.c.

442 {
443  GNUNET_assert ((session) && (hash));
444 
445  if ((0 < GNUNET_CONTAINER_multihashmap_remove_all(session->history, hash)) && (session->next))
446  clear_member_session_history(session->next, hash);
447 }
void clear_member_session_history(struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_HashCode *hash)
Removes a message from the history of a session using the messages hash.
int GNUNET_CONTAINER_multihashmap_remove_all(struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key)
Remove all entries for the given key from the map.

References clear_member_session_history(), GNUNET_assert, GNUNET_CONTAINER_multihashmap_remove_all(), GNUNET_MESSENGER_MemberSession::history, and GNUNET_MESSENGER_MemberSession::next.

Referenced by clear_member_session_history().

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◆ clear_member_session_history()

void clear_member_session_history ( struct GNUNET_MESSENGER_MemberSession session,
const struct GNUNET_HashCode hash 
)

Removes a message from the history of a session using the messages hash.

Parameters
[in/out]session Member session
[in]hashHash of message

Definition at line 450 of file gnunet-service-messenger_member_session.c.

452 {
453  GNUNET_assert((session) && (hash));
454 
455  clear_member_chain_history (session, hash);
456 }
static void clear_member_chain_history(struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_HashCode *hash)

References clear_member_chain_history(), and GNUNET_assert.

Referenced by clear_member_chain_history().

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◆ load_member_session_history()

static void load_member_session_history ( struct GNUNET_MESSENGER_MemberSession session,
const char *  path 
)
static

Definition at line 465 of file gnunet-service-messenger_member_session.c.

467 {
468  GNUNET_assert((session) && (path));
469 
470  if (GNUNET_YES != GNUNET_DISK_file_test (path))
471  return;
472 
474 
476  path, GNUNET_DISK_OPEN_READ, permission
477  );
478 
479  if (!handle)
480  return;
481 
483 
485  ssize_t len;
486 
487  int status;
488 
489  do {
490  len = GNUNET_DISK_file_read(handle, &(entry.hash), sizeof(entry.hash));
491 
492  if (len != sizeof(entry.hash))
493  break;
494 
495  len = GNUNET_DISK_file_read(handle, &(entry.ownership), sizeof(entry.ownership));
496 
497  if (len != sizeof(entry.ownership))
498  break;
499 
500  status = GNUNET_CONTAINER_multihashmap_put(session->history, &(entry.hash), (entry.ownership? session : NULL),
502  } while (status == GNUNET_OK);
503 
505 }
static struct GNUNET_DNS_Handle * handle
Handle to transport service.
uint16_t status
See PRISM_STATUS_*-constants.
uint16_t len
length of data (which is always a uint32_t, but presumably this can be used to specify that fewer byt...
struct GNUNET_DISK_FileHandle * GNUNET_DISK_file_open(const char *fn, enum GNUNET_DISK_OpenFlags flags, enum GNUNET_DISK_AccessPermissions perm)
Open a file.
Definition: disk.c:1235
enum GNUNET_GenericReturnValue GNUNET_DISK_file_test(const char *fil)
Check that fil corresponds to a filename (of a file that exists and that is not a directory).
Definition: disk.c:482
off_t GNUNET_DISK_file_seek(const struct GNUNET_DISK_FileHandle *h, off_t offset, enum GNUNET_DISK_Seek whence)
Move the read/write pointer in a file.
Definition: disk.c:206
GNUNET_DISK_AccessPermissions
File access permissions, UNIX-style.
enum GNUNET_GenericReturnValue GNUNET_DISK_file_close(struct GNUNET_DISK_FileHandle *h)
Close an open file.
Definition: disk.c:1306
ssize_t GNUNET_DISK_file_read(const struct GNUNET_DISK_FileHandle *h, void *result, size_t len)
Read the contents of a binary file into a buffer.
Definition: disk.c:622
@ GNUNET_DISK_OPEN_READ
Open the file for reading.
@ GNUNET_DISK_PERM_USER_READ
Owner can read.
@ GNUNET_DISK_PERM_USER_WRITE
Owner can write.
@ GNUNET_DISK_SEEK_SET
Seek an absolute position (from the start of the file).
Handle used to access files (and pipes).

References GNUNET_assert, GNUNET_CONTAINER_multihashmap_put(), GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST, GNUNET_DISK_file_close(), GNUNET_DISK_file_open(), GNUNET_DISK_file_read(), GNUNET_DISK_file_seek(), GNUNET_DISK_file_test(), GNUNET_DISK_OPEN_READ, GNUNET_DISK_PERM_USER_READ, GNUNET_DISK_PERM_USER_WRITE, GNUNET_DISK_SEEK_SET, GNUNET_OK, GNUNET_YES, handle, GNUNET_MESSENGER_MemberSessionHistoryEntry::hash, GNUNET_MESSENGER_MemberSession::history, len, GNUNET_MESSENGER_MemberSessionHistoryEntry::ownership, and status.

Referenced by load_member_session().

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◆ load_member_session()

void load_member_session ( struct GNUNET_MESSENGER_Member member,
const char *  directory 
)

Loads data from a directory into a new allocated and created member session of a member if the required information can be read from the content of the given directory.

Parameters
[out]memberMember
[in]directoryPath to a directory

Definition at line 508 of file gnunet-service-messenger_member_session.c.

510 {
511  GNUNET_assert ((member) && (directory));
512 
513  char *config_file;
514  GNUNET_asprintf (&config_file, "%s%s", directory, "session.cfg");
515 
516  struct GNUNET_MESSENGER_MemberSession *session = NULL;
517 
519  goto free_config;
520 
522 
524  {
525  char *key_data;
526 
527  if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string(cfg, "session", "key", &key_data))
528  goto destroy_config;
529 
531 
533 
534  GNUNET_free(key_data);
535 
536  if (GNUNET_OK != key_return)
537  goto destroy_config;
538 
539  session = create_member_session(member, &key);
540 
541  unsigned long long numeric_value;
542 
543  if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "session", "start", &numeric_value))
544  session->start.abs_value_us = numeric_value;
545 
546  if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "session", "closed", &numeric_value))
547  session->closed = (GNUNET_YES == numeric_value? GNUNET_YES : GNUNET_NO);
548 
549  if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "session", "completed", &numeric_value))
550  session->completed = (GNUNET_YES == numeric_value? GNUNET_YES : GNUNET_NO);
551  }
552 
553 destroy_config:
555 
556 free_config:
558 
559  if (!session)
560  return;
561 
562  char *history_file;
563  GNUNET_asprintf (&history_file, "%s%s", directory, "history.map");
564 
565  load_member_session_history (session, history_file);
566  GNUNET_free(history_file);
567 
568  char *messages_file;
569  GNUNET_asprintf (&messages_file, "%s%s", directory, "messages.list");
570 
571  load_list_messages(&(session->messages), messages_file);
572  GNUNET_free(messages_file);
573 
574  add_member_session(member, session);
575 }
static const struct GNUNET_CONFIGURATION_Handle * cfg
Configuration we are using.
Definition: gnunet-abd.c:36
static char * config_file
Set to the name of the config file used.
Definition: gnunet-arm.c:84
void load_list_messages(struct GNUNET_MESSENGER_ListMessages *messages, const char *path)
Loads the list of message hashes from a file under a given path.
void add_member_session(struct GNUNET_MESSENGER_Member *member, struct GNUNET_MESSENGER_MemberSession *session)
Adds a given member session to its member.
static void load_member_session_history(struct GNUNET_MESSENGER_MemberSession *session, const char *path)
struct GNUNET_MESSENGER_MemberSession * create_member_session(struct GNUNET_MESSENGER_Member *member, const struct GNUNET_IDENTITY_PublicKey *pubkey)
Creates and allocates a new member session of a member with a given public key.
GNUNET_GenericReturnValue
Named constants for return values.
Definition: gnunet_common.h:92
enum GNUNET_GenericReturnValue GNUNET_CONFIGURATION_get_value_number(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, unsigned long long *number)
Get a configuration value that should be a number.
struct GNUNET_CONFIGURATION_Handle * GNUNET_CONFIGURATION_create(void)
Create a new configuration object.
void GNUNET_CONFIGURATION_destroy(struct GNUNET_CONFIGURATION_Handle *cfg)
Destroy configuration object.
enum GNUNET_GenericReturnValue GNUNET_CONFIGURATION_get_value_string(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, char **value)
Get a configuration value that should be a string.
enum GNUNET_GenericReturnValue GNUNET_CONFIGURATION_parse(struct GNUNET_CONFIGURATION_Handle *cfg, const char *filename)
Parse a configuration file, add all of the options in the file to the configuration environment.
enum GNUNET_GenericReturnValue GNUNET_IDENTITY_public_key_from_string(const char *str, struct GNUNET_IDENTITY_PublicKey *key)
Parses a (Base32) string representation of the public key.
int int GNUNET_asprintf(char **buf, const char *format,...) __attribute__((format(printf
Like asprintf, just portable.
An identity key as per LSD0001.
uint64_t abs_value_us
The actual value.

References GNUNET_TIME_Absolute::abs_value_us, add_member_session(), cfg, GNUNET_MESSENGER_MemberSession::closed, GNUNET_MESSENGER_MemberSession::completed, config_file, create_member_session(), GNUNET_asprintf(), GNUNET_assert, GNUNET_CONFIGURATION_create(), GNUNET_CONFIGURATION_destroy(), GNUNET_CONFIGURATION_get_value_number(), GNUNET_CONFIGURATION_get_value_string(), GNUNET_CONFIGURATION_parse(), GNUNET_DISK_file_test(), GNUNET_free, GNUNET_IDENTITY_public_key_from_string(), GNUNET_NO, GNUNET_OK, GNUNET_YES, key, load_list_messages(), load_member_session_history(), GNUNET_MESSENGER_MemberSession::messages, and GNUNET_MESSENGER_MemberSession::start.

Referenced by callback_scan_for_sessions().

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◆ get_cycle_safe_next_session()

static struct GNUNET_MESSENGER_MemberSession* get_cycle_safe_next_session ( struct GNUNET_MESSENGER_MemberSession session,
struct GNUNET_MESSENGER_MemberSession next 
)
static

Definition at line 578 of file gnunet-service-messenger_member_session.c.

580 {
581  if (!next)
582  return NULL;
583 
584  struct GNUNET_MESSENGER_MemberSession *check = next;
585 
586  do {
587  if (check == session)
588  return NULL;
589 
590  check = check->next;
591  } while (check);
592 
593  return next;
594 }

References GNUNET_MESSENGER_MemberSession::next.

Referenced by load_member_session_next().

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◆ load_member_session_next()

void load_member_session_next ( struct GNUNET_MESSENGER_MemberSession session,
const char *  directory 
)

Loads the connection from one session to another through the next attribute.

Necessary information will be loaded from a configuration file inside of a given directory.

Parameters
[in/out]session Member session
[in]directoryPath to a directory

Definition at line 597 of file gnunet-service-messenger_member_session.c.

599 {
600  GNUNET_assert ((session) && (directory));
601 
602  char *config_file;
603  GNUNET_asprintf (&config_file, "%s%s", directory, "session.cfg");
604 
606  goto free_config;
607 
609 
611  {
612  char *key_data;
613 
614  if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string(cfg, "session", "next_key", &key_data))
615  goto destroy_config;
616 
617  struct GNUNET_IDENTITY_PublicKey next_key;
618 
619  enum GNUNET_GenericReturnValue key_return = GNUNET_IDENTITY_public_key_from_string(key_data, &next_key);
620 
621  GNUNET_free(key_data);
622 
623  if (GNUNET_OK != key_return)
624  goto destroy_config;
625 
627 
628  if (GNUNET_OK != GNUNET_CONFIGURATION_get_data (cfg, "session", "next_id", &next_id, sizeof(next_id)))
629  goto destroy_config;
630 
631  struct GNUNET_MESSENGER_Member *member = get_store_member(session->member->store, &next_id);
632 
634  session, member? get_member_session (member, &next_key) : NULL
635  );
636 
637  if (session->next)
638  session->next->prev = session;
639  }
640 
641 destroy_config:
643 
644 free_config:
646 }
static char * next_id
Command-line option for namespace publishing: identifier for updates to this publication.
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.
static struct GNUNET_MESSENGER_MemberSession * get_cycle_safe_next_session(struct GNUNET_MESSENGER_MemberSession *session, struct GNUNET_MESSENGER_MemberSession *next)
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.
enum GNUNET_GenericReturnValue GNUNET_CONFIGURATION_get_data(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, void *buf, size_t buf_size)
Get Crockford32-encoded fixed-size binary data from a configuration.
A 256-bit hashcode.

References cfg, config_file, get_cycle_safe_next_session(), get_member_session(), get_store_member(), GNUNET_asprintf(), GNUNET_assert, GNUNET_CONFIGURATION_create(), GNUNET_CONFIGURATION_destroy(), GNUNET_CONFIGURATION_get_data(), GNUNET_CONFIGURATION_get_value_string(), GNUNET_CONFIGURATION_parse(), GNUNET_DISK_file_test(), GNUNET_free, GNUNET_IDENTITY_public_key_from_string(), GNUNET_OK, GNUNET_YES, GNUNET_MESSENGER_MemberSession::member, GNUNET_MESSENGER_MemberSession::next, next_id, GNUNET_MESSENGER_MemberSession::prev, and GNUNET_MESSENGER_Member::store.

Referenced by iterate_load_next_session().

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◆ iterate_save_member_session_history_hentries()

static int iterate_save_member_session_history_hentries ( void *  cls,
const struct GNUNET_HashCode key,
void *  value 
)
static

Definition at line 649 of file gnunet-service-messenger_member_session.c.

652 {
653  struct GNUNET_DISK_FileHandle *handle = cls;
654  unsigned char ownership = value? GNUNET_YES : GNUNET_NO;
655 
656  GNUNET_DISK_file_write(handle, key, sizeof(*key));
657  GNUNET_DISK_file_write(handle, &ownership, sizeof(ownership));
658 
659  return GNUNET_YES;
660 }
ssize_t GNUNET_DISK_file_write(const struct GNUNET_DISK_FileHandle *h, const void *buffer, size_t n)
Write a buffer to a file.
Definition: disk.c:686

References GNUNET_DISK_file_write(), GNUNET_NO, GNUNET_YES, handle, key, and value.

Referenced by save_member_session_history().

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◆ save_member_session_history()

static void save_member_session_history ( struct GNUNET_MESSENGER_MemberSession session,
const char *  path 
)
static

Definition at line 663 of file gnunet-service-messenger_member_session.c.

665 {
666  GNUNET_assert((session) && (path));
667 
669 
672  );
673 
674  if (!handle)
675  return;
676 
678 
680  session->history,
682  handle
683  );
684 
687 }
static int iterate_save_member_session_history_hentries(void *cls, const struct GNUNET_HashCode *key, void *value)
enum GNUNET_GenericReturnValue GNUNET_DISK_file_sync(const struct GNUNET_DISK_FileHandle *h)
Write file changes to disk.
Definition: disk.c:1425
@ GNUNET_DISK_OPEN_WRITE
Open the file for writing.
@ GNUNET_DISK_OPEN_CREATE
Create file if it doesn't exist.

References GNUNET_assert, GNUNET_CONTAINER_multihashmap_iterate(), GNUNET_DISK_file_close(), GNUNET_DISK_file_open(), GNUNET_DISK_file_seek(), GNUNET_DISK_file_sync(), GNUNET_DISK_OPEN_CREATE, GNUNET_DISK_OPEN_WRITE, GNUNET_DISK_PERM_USER_READ, GNUNET_DISK_PERM_USER_WRITE, GNUNET_DISK_SEEK_SET, handle, GNUNET_MESSENGER_MemberSession::history, and iterate_save_member_session_history_hentries().

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◆ save_member_session()

void save_member_session ( struct GNUNET_MESSENGER_MemberSession session,
const char *  directory 
)

Saves data from a member session into a directory which can be load to restore the member session completely.

Parameters
[in]sessionMember session
[in]directoryPath to a directory

Definition at line 690 of file gnunet-service-messenger_member_session.c.

692 {
693  GNUNET_assert ((session) && (directory));
694 
695  char *config_file;
696  GNUNET_asprintf (&config_file, "%s%s", directory, "session.cfg");
697 
699 
701 
702  if (key_data)
703  {
704  GNUNET_CONFIGURATION_set_value_string (cfg, "session", "key", key_data);
705 
706  GNUNET_free(key_data);
707  }
708 
709  if (session->next)
710  {
711  const struct GNUNET_ShortHashCode *next_id = get_member_session_id(session->next);
712 
713  char *next_id_data = GNUNET_STRINGS_data_to_string_alloc (next_id, sizeof(*next_id));
714 
715  if (next_id_data)
716  {
717  GNUNET_CONFIGURATION_set_value_string (cfg, "session", "next_id", next_id_data);
718 
719  GNUNET_free(next_id_data);
720  }
721 
723 
724  if (key_data)
725  {
726  GNUNET_CONFIGURATION_set_value_string (cfg, "session", "next_key", key_data);
727 
728  GNUNET_free(key_data);
729  }
730  }
731 
732  GNUNET_CONFIGURATION_set_value_number(cfg, "session", "start", session->start.abs_value_us);
733 
734  GNUNET_CONFIGURATION_set_value_number (cfg, "session", "closed", session->closed);
735  GNUNET_CONFIGURATION_set_value_number (cfg, "session", "completed", session->completed);
736 
739 
741 
742  char *history_file;
743  GNUNET_asprintf (&history_file, "%s%s", directory, "history.map");
744 
745  save_member_session_history (session, history_file);
746  GNUNET_free(history_file);
747 
748  char *messages_file;
749  GNUNET_asprintf (&messages_file, "%s%s", directory, "messages.list");
750 
751  save_list_messages(&(session->messages), messages_file);
752  GNUNET_free(messages_file);
753 }
void save_list_messages(const struct GNUNET_MESSENGER_ListMessages *messages, const char *path)
Saves the list of message hashes to a file under a given path.
static void save_member_session_history(struct GNUNET_MESSENGER_MemberSession *session, const char *path)
void GNUNET_CONFIGURATION_set_value_string(struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, const char *value)
Set a configuration value that should be a string.
void GNUNET_CONFIGURATION_set_value_number(struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, unsigned long long number)
Set a configuration value that should be a number.
enum GNUNET_GenericReturnValue GNUNET_CONFIGURATION_write(struct GNUNET_CONFIGURATION_Handle *cfg, const char *filename)
Write configuration file.
char * GNUNET_IDENTITY_public_key_to_string(const struct GNUNET_IDENTITY_PublicKey *key)
Creates a (Base32) string representation of the public key.
char * GNUNET_STRINGS_data_to_string_alloc(const void *buf, size_t size)
Return the base32crockford encoding of the given buffer.
Definition: strings.c:750

Referenced by iterate_save_session().

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