GNUnet 0.21.1
gnunet-service-messenger_list_messages.h File Reference
#include "gnunet_common.h"
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Data Structures

struct  GNUNET_MESSENGER_ListMessage
 
struct  GNUNET_MESSENGER_ListMessages
 

Functions

void init_list_messages (struct GNUNET_MESSENGER_ListMessages *messages)
 Initializes list of message hashes as empty list. More...
 
void clear_list_messages (struct GNUNET_MESSENGER_ListMessages *messages)
 Clears the list of message hashes. More...
 
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. More...
 
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. More...
 
void remove_from_list_messages (struct GNUNET_MESSENGER_ListMessages *messages, const struct GNUNET_HashCode *hash)
 Removes the first entry with a matching hash from the list. More...
 
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. More...
 
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. More...
 

Function Documentation

◆ init_list_messages()

void init_list_messages ( struct GNUNET_MESSENGER_ListMessages messages)

Initializes list of message hashes as empty list.

Parameters
[out]messagesList of hashes

Definition at line 31 of file gnunet-service-messenger_list_messages.c.

32{
33 GNUNET_assert (messages);
34
35 messages->head = NULL;
36 messages->tail = NULL;
37}
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
struct GNUNET_MESSENGER_ListMessage * head
struct GNUNET_MESSENGER_ListMessage * tail

References GNUNET_assert, GNUNET_MESSENGER_ListMessages::head, and GNUNET_MESSENGER_ListMessages::tail.

Referenced by check_member_session_completion(), create_member_session(), create_srv_room(), init_message_state(), and switch_member_session().

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◆ clear_list_messages()

void clear_list_messages ( struct GNUNET_MESSENGER_ListMessages messages)

Clears the list of message hashes.

Parameters
[in,out]messagesList of hashes

Definition at line 41 of file gnunet-service-messenger_list_messages.c.

42{
43 GNUNET_assert (messages);
44
45 while (messages->head)
46 {
47 struct GNUNET_MESSENGER_ListMessage *element = messages->head;
48
49 GNUNET_CONTAINER_DLL_remove (messages->head, messages->tail, element);
50 GNUNET_free (element);
51 }
52
53 messages->head = NULL;
54 messages->tail = NULL;
55}
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
#define GNUNET_free(ptr)
Wrapper around free.

References GNUNET_assert, GNUNET_CONTAINER_DLL_remove, GNUNET_free, GNUNET_MESSENGER_ListMessages::head, and GNUNET_MESSENGER_ListMessages::tail.

Referenced by check_member_session_completion(), clear_message_state(), destroy_member_session(), and reset_member_session().

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◆ add_to_list_messages()

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.

Parameters
[in,out]messagesList of hashes
[in]hashHash of message

Definition at line 59 of file gnunet-service-messenger_list_messages.c.

61{
62 GNUNET_assert ((messages) && (hash));
63
64 struct GNUNET_MESSENGER_ListMessage *element = GNUNET_new (struct
66
67 GNUNET_memcpy (&(element->hash), hash, sizeof(struct GNUNET_HashCode));
68
69 GNUNET_CONTAINER_DLL_insert_tail (messages->head, messages->tail, element);
70}
#define GNUNET_CONTAINER_DLL_insert_tail(head, tail, element)
Insert an element at the tail of a DLL.
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
A 512-bit hashcode.

References GNUNET_assert, GNUNET_CONTAINER_DLL_insert_tail, GNUNET_memcpy, GNUNET_new, GNUNET_MESSENGER_ListMessage::hash, GNUNET_MESSENGER_ListMessages::head, and GNUNET_MESSENGER_ListMessages::tail.

Referenced by callback_room_handle_message(), check_member_session_completion(), copy_list_messages(), load_list_messages(), reset_member_session(), update_member_session_history(), and update_message_state().

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◆ copy_list_messages()

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.

Parameters
[in,out]messagesDestination list of hashes
[in]originSource list of hashes

Definition at line 74 of file gnunet-service-messenger_list_messages.c.

76{
77 GNUNET_assert ((messages) && (origin));
78
79 struct GNUNET_MESSENGER_ListMessage *element;
80
81 for (element = origin->head; element; element = element->next)
82 add_to_list_messages (messages, &(element->hash));
83}
static char origin[GNUNET_DNSPARSER_MAX_NAME_LENGTH]
Current origin.
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.
struct GNUNET_MESSENGER_ListMessage * next

References add_to_list_messages(), GNUNET_assert, GNUNET_MESSENGER_ListMessage::hash, GNUNET_MESSENGER_ListMessage::next, and origin.

Referenced by check_member_session_completion(), and switch_member_session().

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◆ remove_from_list_messages()

void remove_from_list_messages ( struct GNUNET_MESSENGER_ListMessages messages,
const struct GNUNET_HashCode hash 
)

Removes the first entry with a matching hash from the list.

Parameters
[in,out]messagesList of hashes
[in]hashHash of message

Definition at line 87 of file gnunet-service-messenger_list_messages.c.

89{
90 GNUNET_assert ((messages) && (hash));
91
92 struct GNUNET_MESSENGER_ListMessage *element;
93
94 for (element = messages->head; element; element = element->next)
95 if (0 == GNUNET_CRYPTO_hash_cmp (&(element->hash), hash))
96 {
97 GNUNET_CONTAINER_DLL_remove (messages->head, messages->tail, element);
98 GNUNET_free (element);
99 break;
100 }
101}
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:221

References GNUNET_assert, GNUNET_CONTAINER_DLL_remove, GNUNET_CRYPTO_hash_cmp(), GNUNET_free, GNUNET_MESSENGER_ListMessage::hash, GNUNET_MESSENGER_ListMessages::head, GNUNET_MESSENGER_ListMessage::next, and GNUNET_MESSENGER_ListMessages::tail.

Referenced by update_message_state().

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◆ load_list_messages()

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.

Parameters
[out]messagesList of hashes
[in]pathPath of file

Definition at line 105 of file gnunet-service-messenger_list_messages.c.

107{
108 GNUNET_assert ((messages) && (path));
109
110 if (GNUNET_YES != GNUNET_DISK_file_test (path))
111 return;
112
115 );
116
118 path, GNUNET_DISK_OPEN_READ, permission
119 );
120
121 if (! handle)
122 return;
123
125
126 struct GNUNET_HashCode hash;
127 ssize_t len;
128
129 do {
130 len = GNUNET_DISK_file_read (handle, &hash, sizeof(hash));
131
132 if (len != sizeof(hash))
133 break;
134
135 add_to_list_messages (messages, &hash);
136 } while (len == sizeof(hash));
137
139}
static struct GNUNET_VPN_Handle * handle
Handle to vpn service.
Definition: gnunet-vpn.c:35
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:1237
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:205
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:1308
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).
@ GNUNET_YES
Handle used to access files (and pipes).

References add_to_list_messages(), GNUNET_assert, 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_YES, and handle.

Referenced by load_member_session(), and load_message_state().

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◆ save_list_messages()

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.

Parameters
[in]messagesList of hashes
[in]pathPath of file

Definition at line 143 of file gnunet-service-messenger_list_messages.c.

145{
146 GNUNET_assert ((messages) && (path));
147
150 );
151
154 );
155
156 if (! handle)
157 return;
158
160
161 struct GNUNET_MESSENGER_ListMessage *element;
162
163 for (element = messages->head; element; element = element->next)
164 GNUNET_DISK_file_write (handle, &(element->hash), sizeof(element->hash));
165
168}
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
enum GNUNET_GenericReturnValue GNUNET_DISK_file_sync(const struct GNUNET_DISK_FileHandle *h)
Write file changes to disk.
Definition: disk.c:1427
@ GNUNET_DISK_OPEN_WRITE
Open the file for writing.
@ GNUNET_DISK_OPEN_CREATE
Create file if it doesn't exist.

References GNUNET_assert, GNUNET_DISK_file_close(), GNUNET_DISK_file_open(), GNUNET_DISK_file_seek(), GNUNET_DISK_file_sync(), GNUNET_DISK_file_write(), 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_ListMessage::hash, GNUNET_MESSENGER_ListMessages::head, and GNUNET_MESSENGER_ListMessage::next.

Referenced by save_member_session(), and save_message_state().

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