GNUnet  0.11.x
Functions
gnunet-service-messenger_list_messages.c File Reference

GNUnet MESSENGER service. More...

#include "gnunet-service-messenger_list_messages.h"
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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...
 

Detailed Description

GNUnet MESSENGER service.

Author
Tobias Frisch

Definition in file gnunet-service-messenger_list_messages.c.

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 29 of file gnunet-service-messenger_list_messages.c.

30 {
31  GNUNET_assert(messages);
32 
33  messages->head = NULL;
34  messages->tail = NULL;
35 }
#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_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]messages List of hashes

Definition at line 38 of file gnunet-service-messenger_list_messages.c.

39 {
40  GNUNET_assert(messages);
41 
42  while (messages->head)
43  {
44  struct GNUNET_MESSENGER_ListMessage *element = messages->head;
45 
46  GNUNET_CONTAINER_DLL_remove(messages->head, messages->tail, element);
47  GNUNET_free(element);
48  }
49 
50  messages->head = NULL;
51  messages->tail = NULL;
52 }
#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]messages List of hashes
[in]hashHash of message

Definition at line 55 of file gnunet-service-messenger_list_messages.c.

57 {
58  GNUNET_assert((messages) && (hash));
59 
61 
62  GNUNET_memcpy(&(element->hash), hash, sizeof(struct GNUNET_HashCode));
63 
64  GNUNET_CONTAINER_DLL_insert_tail(messages->head, messages->tail, element);
65 }
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_CONTAINER_DLL_insert_tail(head, tail, element)
Insert an element at the tail of a DLL.
#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]messages Destination list of hashes
[in]originSource list of hashes

Definition at line 68 of file gnunet-service-messenger_list_messages.c.

70 {
71  GNUNET_assert((messages) && (origin));
72 
73  struct GNUNET_MESSENGER_ListMessage *element;
74 
75  for (element = origin->head; element; element = element->next)
76  add_to_list_messages (messages, &(element->hash));
77 }
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_ListMessages::head, and GNUNET_MESSENGER_ListMessage::next.

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]messages List of hashes
[in]hashHash of message

Definition at line 80 of file gnunet-service-messenger_list_messages.c.

82 {
83  GNUNET_assert((messages) && (hash));
84 
85  struct GNUNET_MESSENGER_ListMessage *element;
86 
87  for (element = messages->head; element; element = element->next)
88  if (0 == GNUNET_CRYPTO_hash_cmp (&(element->hash), hash))
89  {
90  GNUNET_CONTAINER_DLL_remove(messages->head, messages->tail, element);
91  GNUNET_free(element);
92  break;
93  }
94 }
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

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 97 of file gnunet-service-messenger_list_messages.c.

99 {
100  GNUNET_assert((messages) && (path));
101 
102  if (GNUNET_YES != GNUNET_DISK_file_test (path))
103  return;
104 
106 
108  path, GNUNET_DISK_OPEN_READ, permission
109  );
110 
111  if (!handle)
112  return;
113 
115 
116  struct GNUNET_HashCode hash;
117  ssize_t len;
118 
119  do {
120  len = GNUNET_DISK_file_read(handle, &hash, sizeof(hash));
121 
122  if (len != sizeof(hash))
123  break;
124 
125  add_to_list_messages(messages, &hash);
126  } while (len == sizeof(hash));
127 
129 }
static struct GNUNET_DNS_Handle * handle
Handle to transport service.
uint16_t len
length of data (which is always a uint32_t, but presumably this can be used to specify that fewer byt...
@ GNUNET_YES
Definition: gnunet_common.h:97
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 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, handle, and len.

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 132 of file gnunet-service-messenger_list_messages.c.

134 {
135  GNUNET_assert((messages) && (path));
136 
138 
141  );
142 
143  if (!handle)
144  return;
145 
147 
148  struct GNUNET_MESSENGER_ListMessage *element;
149 
150  for (element = messages->head; element; element = element->next)
151  GNUNET_DISK_file_write(handle, &(element->hash), sizeof(element->hash));
152 
155 }
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: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_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_message_state().

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