GNUnet  0.19.3
messenger_api_contact.c
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1 /*
2  This file is part of GNUnet.
3  Copyright (C) 2020--2021 GNUnet e.V.
4 
5  GNUnet is free software: you can redistribute it and/or modify it
6  under the terms of the GNU Affero General Public License as published
7  by the Free Software Foundation, either version 3 of the License,
8  or (at your option) any later version.
9 
10  GNUnet is distributed in the hope that it will be useful, but
11  WITHOUT ANY WARRANTY; without even the implied warranty of
12  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  Affero General Public License for more details.
14 
15  You should have received a copy of the GNU Affero General Public License
16  along with this program. If not, see <http://www.gnu.org/licenses/>.
17 
18  SPDX-License-Identifier: AGPL3.0-or-later
19  */
26 #include "platform.h"
27 #include "messenger_api_contact.h"
28 
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 }
43 
44 void
46 {
47  GNUNET_assert(contact);
48 
49  if (contact->name)
50  GNUNET_free(contact->name);
51 
52  GNUNET_free(contact);
53 }
54 
55 const char*
57 {
58  GNUNET_assert(contact);
59 
60  return contact->name;
61 }
62 
63 void
65  const char *name)
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 }
74 
75 const struct GNUNET_IDENTITY_PublicKey*
77 {
78  GNUNET_assert(contact);
79 
80  return &(contact->public_key);
81 }
82 
83 void
85 {
86  GNUNET_assert(contact);
87 
88  contact->rc++;
89 }
90 
91 int
93 {
94  GNUNET_assert(contact);
95 
96  if (contact->rc > 0)
97  contact->rc--;
98 
99  return contact->rc ? GNUNET_NO : GNUNET_YES;
100 }
101 
102 void
104  const struct GNUNET_ShortHashCode *id,
105  struct GNUNET_HashCode *context)
106 {
107  GNUNET_assert((key) && (id) && (context));
108 
109  GNUNET_CRYPTO_hash (id, sizeof(*id), context);
111 }
struct GNUNET_HashCode key
The key used in the DHT.
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
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
@ GNUNET_YES
@ GNUNET_NO
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_strdup(a)
Wrapper around GNUNET_xstrdup_.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
#define GNUNET_free(ptr)
Wrapper around free.
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.
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...
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.
void destroy_contact(struct GNUNET_MESSENGER_Contact *contact)
Destroys a contact and frees its memory fully.
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.
const struct GNUNET_IDENTITY_PublicKey * get_contact_key(const struct GNUNET_MESSENGER_Contact *contact)
Returns the public key of a given contact.
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.
messenger api: client implementation of GNUnet MESSENGER service
const char * name
A 512-bit hashcode.
An identity key as per LSD0001.
struct GNUNET_IDENTITY_PublicKey public_key
A 256-bit hashcode.