GNUnet  0.19.2
messenger_api_contact.c File Reference

messenger api: client implementation of GNUnet MESSENGER service More...

#include "platform.h"
#include "messenger_api_contact.h"
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Functions

struct GNUNET_MESSENGER_Contactcreate_contact (const struct GNUNET_IDENTITY_PublicKey *key)
 Creates and allocates a new contact with a given public key from an EGO. More...
 
void destroy_contact (struct GNUNET_MESSENGER_Contact *contact)
 Destroys a contact and frees its memory fully. More...
 
const char * get_contact_name (const struct GNUNET_MESSENGER_Contact *contact)
 Returns the current name of a given contact or NULL if no valid name was assigned yet. More...
 
void set_contact_name (struct GNUNET_MESSENGER_Contact *contact, const char *name)
 Changes the current name of a given contact by copying it from the parameter name. More...
 
const struct GNUNET_IDENTITY_PublicKeyget_contact_key (const struct GNUNET_MESSENGER_Contact *contact)
 Returns the public key of a given contact. More...
 
void increase_contact_rc (struct GNUNET_MESSENGER_Contact *contact)
 Increases the reference counter of a given contact which is zero as default. More...
 
int decrease_contact_rc (struct GNUNET_MESSENGER_Contact *contact)
 Decreases the reference counter if possible (can not underflow!) of a given contact and returns GNUNET_YES if the counter is equal to zero, otherwise GNUNET_NO. More...
 
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. More...
 

Detailed Description

messenger api: client implementation of GNUnet MESSENGER service

Author
Tobias Frisch

Definition in file messenger_api_contact.c.

Function Documentation

◆ create_contact()

struct GNUNET_MESSENGER_Contact* create_contact ( const struct GNUNET_IDENTITY_PublicKey key)

Creates and allocates a new contact with a given public key from an EGO.

Parameters
[in]keyPublic key
Returns
New contact

Definition at line 30 of file messenger_api_contact.c.

31 {
33 
35 
36  contact->name = NULL;
37  contact->rc = 0;
38 
39  GNUNET_memcpy(&(contact->public_key), key, sizeof(contact->public_key));
40 
41  return contact;
42 }
struct GNUNET_HashCode key
The key used in the DHT.
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
struct GNUNET_IDENTITY_PublicKey public_key

References GNUNET_assert, GNUNET_memcpy, GNUNET_new, key, GNUNET_MESSENGER_Contact::name, GNUNET_MESSENGER_Contact::public_key, and GNUNET_MESSENGER_Contact::rc.

Referenced by get_store_contact().

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◆ destroy_contact()

void destroy_contact ( struct GNUNET_MESSENGER_Contact contact)

Destroys a contact and frees its memory fully.

Parameters
[in,out]contactContact

Definition at line 45 of file messenger_api_contact.c.

46 {
47  GNUNET_assert(contact);
48 
49  if (contact->name)
50  GNUNET_free(contact->name);
51 
52  GNUNET_free(contact);
53 }
#define GNUNET_free(ptr)
Wrapper around free.

References GNUNET_assert, GNUNET_free, and GNUNET_MESSENGER_Contact::name.

Referenced by get_store_contact(), iterate_destroy_contacts(), and remove_store_contact().

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◆ get_contact_name()

const char* get_contact_name ( const struct GNUNET_MESSENGER_Contact contact)

Returns the current name of a given contact or NULL if no valid name was assigned yet.

Parameters
[in]contactContact
Returns
Name of the contact or NULL

Definition at line 56 of file messenger_api_contact.c.

57 {
58  GNUNET_assert(contact);
59 
60  return contact->name;
61 }

References GNUNET_assert, and GNUNET_MESSENGER_Contact::name.

Referenced by GNUNET_MESSENGER_contact_get_name().

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◆ set_contact_name()

void set_contact_name ( struct GNUNET_MESSENGER_Contact contact,
const char *  name 
)

Changes the current name of a given contact by copying it from the parameter name.

Parameters
[in,out]contactContact
[in]nameName

Definition at line 64 of file messenger_api_contact.c.

66 {
67  GNUNET_assert(contact);
68 
69  if (contact->name)
70  GNUNET_free(contact->name);
71 
72  contact->name = name ? GNUNET_strdup(name) : NULL;
73 }
#define GNUNET_strdup(a)
Wrapper around GNUNET_xstrdup_.
const char * name

References GNUNET_assert, GNUNET_free, GNUNET_strdup, name, and GNUNET_MESSENGER_Contact::name.

Referenced by handle_message_name(), and handle_name_message().

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◆ get_contact_key()

const struct GNUNET_IDENTITY_PublicKey* get_contact_key ( const struct GNUNET_MESSENGER_Contact contact)

Returns the public key of a given contact.

Parameters
[in]contactContact
Returns
Public key of the contact

Definition at line 76 of file messenger_api_contact.c.

77 {
78  GNUNET_assert(contact);
79 
80  return &(contact->public_key);
81 }

References GNUNET_assert, and GNUNET_MESSENGER_Contact::public_key.

Referenced by get_store_contact(), GNUNET_MESSENGER_contact_get_key(), GNUNET_MESSENGER_send_message(), handle_id_message(), notify_srv_handle_message(), remove_store_contact(), and update_store_contact().

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◆ increase_contact_rc()

void increase_contact_rc ( struct GNUNET_MESSENGER_Contact contact)

Increases the reference counter of a given contact which is zero as default.

Parameters
[in,out]contactContact

Definition at line 84 of file messenger_api_contact.c.

85 {
86  GNUNET_assert(contact);
87 
88  contact->rc++;
89 }

References GNUNET_assert, and GNUNET_MESSENGER_Contact::rc.

Referenced by create_member_session(), handle_join_message(), reset_member_session(), and switch_member_session().

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◆ decrease_contact_rc()

int decrease_contact_rc ( struct GNUNET_MESSENGER_Contact contact)

Decreases the reference counter if possible (can not underflow!) of a given contact and returns GNUNET_YES if the counter is equal to zero, otherwise GNUNET_NO.

Parameters
[in,out]contactContact
Returns
GNUNET_YES or GNUNET_NO depending on the reference counter

Definition at line 92 of file messenger_api_contact.c.

93 {
94  GNUNET_assert(contact);
95 
96  if (contact->rc > 0)
97  contact->rc--;
98 
99  return contact->rc ? GNUNET_NO : GNUNET_YES;
100 }
@ GNUNET_YES
@ GNUNET_NO

References GNUNET_assert, GNUNET_NO, GNUNET_YES, and GNUNET_MESSENGER_Contact::rc.

Referenced by check_member_session_completion(), destroy_member_session(), and handle_leave_message().

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◆ get_context_from_member()

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.

Parameters
[in]keyKey of room
[in]idMember id
[out]contextMember context

Definition at line 103 of file messenger_api_contact.c.

106 {
107  GNUNET_assert((key) && (id) && (context));
108 
109  GNUNET_CRYPTO_hash (id, sizeof(*id), context);
111 }
static pa_context * context
Pulseaudio context.
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_xor(const struct GNUNET_HashCode *a, const struct GNUNET_HashCode *b, struct GNUNET_HashCode *result)
compute result = a ^ b
Definition: crypto_hash.c:135

References context, GNUNET_assert, GNUNET_CRYPTO_hash(), GNUNET_CRYPTO_hash_xor(), and key.

Referenced by create_member_session(), get_handle_contact(), handle_id_message(), handle_join_message(), handle_key_message(), handle_leave_message(), and switch_member_session().

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