GNUnet 0.22.2
messenger_api_util.c File Reference
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Functions

static void callback_close_channel (void *cls)
 
void delayed_disconnect_channel (struct GNUNET_CADET_Channel *channel)
 Starts an urgent task to close a CADET channel asynchronously. More...
 
enum GNUNET_GenericReturnValue generate_free_member_id (struct GNUNET_ShortHashCode *id, const struct GNUNET_CONTAINER_MultiShortmap *members)
 Tries to generate an unused member id and store it into the id parameter. More...
 
const struct GNUNET_CRYPTO_PrivateKeyget_anonymous_private_key (void)
 Returns the private identity key of GNUNET_IDENTITY_ego_get_anonymous() without recalculating it every time. More...
 
const struct GNUNET_CRYPTO_PublicKeyget_anonymous_public_key (void)
 Returns the public identity key of GNUNET_IDENTITY_ego_get_anonymous() without recalculating it every time. More...
 
void convert_messenger_key_to_port (const struct GNUNET_HashCode *key, struct GNUNET_HashCode *port)
 Converts a Messenger service key of a room to the specific port which gets used for the CADET channels. More...
 
void convert_peer_identity_to_id (const struct GNUNET_PeerIdentity *identity, struct GNUNET_ShortHashCode *id)
 Converts a peers identity to a short hash code which can be used as id to refer to a peer via sender id as attached in messages. More...
 

Function Documentation

◆ callback_close_channel()

static void callback_close_channel ( void *  cls)
static

Definition at line 32 of file messenger_api_util.c.

33{
34 struct GNUNET_CADET_Channel *channel;
35
36 channel = cls;
37
38 if (channel)
40}
void GNUNET_CADET_channel_destroy(struct GNUNET_CADET_Channel *channel)
Destroy an existing channel.
Definition: cadet_api.c:830
Opaque handle to a channel.
Definition: cadet.h:116

References GNUNET_CADET_channel_destroy().

Referenced by delayed_disconnect_channel().

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◆ delayed_disconnect_channel()

void delayed_disconnect_channel ( struct GNUNET_CADET_Channel channel)

Starts an urgent task to close a CADET channel asynchronously.

Parameters
[in,out]channelChannel

Definition at line 44 of file messenger_api_util.c.

45{
46 GNUNET_assert (channel);
47
50 callback_close_channel, channel);
51}
@ GNUNET_SCHEDULER_PRIORITY_URGENT
Run with priority for urgent tasks.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed_with_priority(struct GNUNET_TIME_Relative delay, enum GNUNET_SCHEDULER_Priority priority, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
Definition: scheduler.c:1206
struct GNUNET_TIME_Relative GNUNET_TIME_relative_get_zero_(void)
Return relative time of 0ms.
Definition: time.c:133
static void callback_close_channel(void *cls)

References callback_close_channel(), GNUNET_assert, GNUNET_SCHEDULER_add_delayed_with_priority(), GNUNET_SCHEDULER_PRIORITY_URGENT, and GNUNET_TIME_relative_get_zero_().

Referenced by bind_tunnel(), callback_room_connect(), and disconnect_tunnel().

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◆ generate_free_member_id()

enum GNUNET_GenericReturnValue generate_free_member_id ( struct GNUNET_ShortHashCode id,
const struct GNUNET_CONTAINER_MultiShortmap members 
)

Tries to generate an unused member id and store it into the id parameter.

A map containing all currently used member ids is used to check against.

Parameters
[out]idNew member id
[in]membersMap of member ids
Returns
GNUNET_YES on success, GNUNET_NO on failure

Definition at line 55 of file messenger_api_util.c.

57{
58 size_t counter;
59
60 GNUNET_assert (id);
61
62 counter = 1 + (members ? GNUNET_CONTAINER_multishortmap_size (members) : 0);
63
64 do
65 {
68
70 members, id)))
71 counter--;
72 else
73 break;
74 }
75 while (counter > 0);
76
77 if (counter)
78 return GNUNET_YES;
79
80 return GNUNET_NO;
81}
void GNUNET_CRYPTO_random_block(enum GNUNET_CRYPTO_Quality mode, void *buffer, size_t length)
Fill block with a random values.
@ GNUNET_CRYPTO_QUALITY_STRONG
High-quality operations are desired.
unsigned int GNUNET_CONTAINER_multishortmap_size(const struct GNUNET_CONTAINER_MultiShortmap *map)
Get the number of key-value pairs in the map.
int GNUNET_CONTAINER_multishortmap_contains(const struct GNUNET_CONTAINER_MultiShortmap *map, const struct GNUNET_ShortHashCode *key)
Check if the map contains any value under the given key (including values that are NULL).
@ GNUNET_YES
@ GNUNET_NO
A 256-bit hashcode.

References GNUNET_assert, GNUNET_CONTAINER_multishortmap_contains(), GNUNET_CONTAINER_multishortmap_size(), GNUNET_CRYPTO_QUALITY_STRONG, GNUNET_CRYPTO_random_block(), GNUNET_NO, and GNUNET_YES.

Referenced by create_handle_member_id(), create_member(), and solve_srv_room_member_collisions().

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◆ get_anonymous_private_key()

const struct GNUNET_CRYPTO_PrivateKey * get_anonymous_private_key ( void  )

Returns the private identity key of GNUNET_IDENTITY_ego_get_anonymous() without recalculating it every time.

Returns
anonymous private key

Definition at line 85 of file messenger_api_util.c.

86{
87 const struct GNUNET_IDENTITY_Ego *ego;
90}
const struct GNUNET_CRYPTO_PrivateKey * GNUNET_IDENTITY_ego_get_private_key(const struct GNUNET_IDENTITY_Ego *ego)
Obtain the ECC key associated with a ego.
Definition: identity_api.c:517
struct GNUNET_IDENTITY_Ego * GNUNET_IDENTITY_ego_get_anonymous(void)
Obtain the ego representing 'anonymous' users.
Definition: identity_api.c:157
Handle for an ego.
Definition: identity.h:37

References GNUNET_IDENTITY_ego_get_anonymous(), and GNUNET_IDENTITY_ego_get_private_key().

Referenced by get_handle_key().

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◆ get_anonymous_public_key()

const struct GNUNET_CRYPTO_PublicKey * get_anonymous_public_key ( void  )

Returns the public identity key of GNUNET_IDENTITY_ego_get_anonymous() without recalculating it every time.

Returns
anonymous public key

Definition at line 94 of file messenger_api_util.c.

95{
96 static struct GNUNET_CRYPTO_PublicKey public_key;
97 static struct GNUNET_IDENTITY_Ego *ego = NULL;
98
99 if (! ego)
100 {
102 GNUNET_IDENTITY_ego_get_public_key (ego, &public_key);
103 }
104
105 return &public_key;
106}
void GNUNET_IDENTITY_ego_get_public_key(struct GNUNET_IDENTITY_Ego *ego, struct GNUNET_CRYPTO_PublicKey *pk)
Get the identifier (public key) of an ego.
Definition: identity_api.c:529
An identity key as per LSD0001.

References GNUNET_IDENTITY_ego_get_anonymous(), and GNUNET_IDENTITY_ego_get_public_key().

Referenced by get_handle_pubkey(), get_non_anonymous_key(), initialize_service_handle(), and select_store_contact_map().

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◆ convert_messenger_key_to_port()

void convert_messenger_key_to_port ( const struct GNUNET_HashCode key,
struct GNUNET_HashCode port 
)

Converts a Messenger service key of a room to the specific port which gets used for the CADET channels.

The port includes upper bits of the GNUNET_MESSENGER_VERSION to reduce the chance of incompatible connections.

Parameters
[in]keyMessenger service room key
[out]portCADET service port

Definition at line 110 of file messenger_api_util.c.

112{
113 static struct GNUNET_HashCode version;
114 static uint32_t version_value = 0;
115
116 GNUNET_assert ((key) && (port));
117
118 if (! version_value)
119 {
120 version_value = (uint32_t) (GNUNET_MESSENGER_VERSION);
121 version_value = ((version_value >> 16) & 0xFFFF);
122 version_value = GNUNET_htole32 (version_value);
123 GNUNET_CRYPTO_hash (&version_value, sizeof(version_value), &version);
124 }
125
126 GNUNET_CRYPTO_hash_sum (key, &version, port);
127}
static uint16_t port
Port number.
Definition: gnunet-bcd.c:146
struct GNUNET_HashCode key
The key used in the DHT.
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:41
void GNUNET_CRYPTO_hash_sum(const struct GNUNET_HashCode *a, const struct GNUNET_HashCode *delta, struct GNUNET_HashCode *result)
compute result = a + delta
Definition: crypto_hash.c:120
#define GNUNET_htole32(x)
#define GNUNET_MESSENGER_VERSION
Version number of GNUnet Messenger API.
A 512-bit hashcode.

References GNUNET_assert, GNUNET_CRYPTO_hash(), GNUNET_CRYPTO_hash_sum(), GNUNET_htole32, GNUNET_MESSENGER_VERSION, key, and port.

Referenced by connect_tunnel(), and open_srv_room().

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◆ convert_peer_identity_to_id()

void convert_peer_identity_to_id ( const struct GNUNET_PeerIdentity identity,
struct GNUNET_ShortHashCode id 
)

Converts a peers identity to a short hash code which can be used as id to refer to a peer via sender id as attached in messages.

Parameters
[in]identityPeer identity
[out]idShort peer id

Definition at line 131 of file messenger_api_util.c.

133{
134 GNUNET_assert ((identity) && (id));
135
136 GNUNET_memcpy (id, identity, sizeof(struct GNUNET_ShortHashCode));
137}
static struct GNUNET_IDENTITY_Handle * identity
Which namespace do we publish to? NULL if we do not publish to a namespace.
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.

References GNUNET_assert, GNUNET_memcpy, and identity.

Referenced by get_store_peer_of(), load_peer_store(), pack_srv_room_message(), and update_store_peer().

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