GNUnet  0.20.0
gnunet-service-messenger_list_messages.c File Reference

GNUnet MESSENGER service. More...

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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 30 of file gnunet-service-messenger_list_messages.c.

31 {
32  GNUNET_assert(messages);
33 
34  messages->head = NULL;
35  messages->tail = NULL;
36 }
#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 39 of file gnunet-service-messenger_list_messages.c.

40 {
41  GNUNET_assert(messages);
42 
43  while (messages->head)
44  {
45  struct GNUNET_MESSENGER_ListMessage *element = messages->head;
46 
47  GNUNET_CONTAINER_DLL_remove(messages->head, messages->tail, element);
48  GNUNET_free(element);
49  }
50 
51  messages->head = NULL;
52  messages->tail = NULL;
53 }
#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 56 of file gnunet-service-messenger_list_messages.c.

58 {
59  GNUNET_assert((messages) && (hash));
60 
62 
63  GNUNET_memcpy(&(element->hash), hash, sizeof(struct GNUNET_HashCode));
64 
65  GNUNET_CONTAINER_DLL_insert_tail(messages->head, messages->tail, element);
66 }
#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 69 of file gnunet-service-messenger_list_messages.c.

71 {
72  GNUNET_assert((messages) && (origin));
73 
74  struct GNUNET_MESSENGER_ListMessage *element;
75 
76  for (element = origin->head; element; element = element->next)
77  add_to_list_messages (messages, &(element->hash));
78 }
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 81 of file gnunet-service-messenger_list_messages.c.

83 {
84  GNUNET_assert((messages) && (hash));
85 
86  struct GNUNET_MESSENGER_ListMessage *element;
87 
88  for (element = messages->head; element; element = element->next)
89  if (0 == GNUNET_CRYPTO_hash_cmp (&(element->hash), hash))
90  {
91  GNUNET_CONTAINER_DLL_remove(messages->head, messages->tail, element);
92  GNUNET_free(element);
93  break;
94  }
95 }
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 98 of file gnunet-service-messenger_list_messages.c.

100 {
101  GNUNET_assert((messages) && (path));
102 
103  if (GNUNET_YES != GNUNET_DISK_file_test (path))
104  return;
105 
107 
109  path, GNUNET_DISK_OPEN_READ, permission
110  );
111 
112  if (!handle)
113  return;
114 
116 
117  struct GNUNET_HashCode hash;
118  ssize_t len;
119 
120  do {
121  len = GNUNET_DISK_file_read(handle, &hash, sizeof(hash));
122 
123  if (len != sizeof(hash))
124  break;
125 
126  add_to_list_messages(messages, &hash);
127  } while (len == sizeof(hash));
128 
130 }
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...
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, 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 133 of file gnunet-service-messenger_list_messages.c.

135 {
136  GNUNET_assert((messages) && (path));
137 
139 
142  );
143 
144  if (!handle)
145  return;
146 
148 
149  struct GNUNET_MESSENGER_ListMessage *element;
150 
151  for (element = messages->head; element; element = element->next)
152  GNUNET_DISK_file_write(handle, &(element->hash), sizeof(element->hash));
153 
156 }
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_message_state().

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