messenger_api_list_tunnels.h File Reference

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

#include "platform.h"
#include "gnunet_peer_lib.h"
#include "gnunet_container_lib.h"

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Data Structures
struct	GNUNET_MESSENGER_ListTunnel
struct	GNUNET_MESSENGER_ListTunnels

Functions
void	init_list_tunnels (struct GNUNET_MESSENGER_ListTunnels *tunnels)
	Initializes list of tunnels peer identities as empty list. More...
void	clear_list_tunnels (struct GNUNET_MESSENGER_ListTunnels *tunnels)
	Clears the list of tunnels peer identities. More...
void	add_to_list_tunnels (struct GNUNET_MESSENGER_ListTunnels *tunnels, const struct GNUNET_PeerIdentity *peer)
	Adds a specific peer from a tunnel to the end of the list. More...
struct GNUNET_MESSENGER_ListTunnel *	find_list_tunnels (struct GNUNET_MESSENGER_ListTunnels *tunnels, const struct GNUNET_PeerIdentity *peer, size_t *index)
	Searches linearly through the list of tunnels peer identities for matching a specific peer identity and returns the matching element of the list. More...
int	contains_list_tunnels (struct GNUNET_MESSENGER_ListTunnels *tunnels, const struct GNUNET_PeerIdentity *peer)
	Tests linearly if the list of tunnels peer identities contains a specific peer identity and returns GNUNET_YES on success, otherwise GNUNET_NO. More...
struct GNUNET_MESSENGER_ListTunnel *	remove_from_list_tunnels (struct GNUNET_MESSENGER_ListTunnels *tunnels, struct GNUNET_MESSENGER_ListTunnel *element)
	Removes a specific element from the list of tunnels peer identities and returns the next element in the list. More...
void	load_list_tunnels (struct GNUNET_MESSENGER_ListTunnels *tunnels, const char *path)
	Loads the list of tunnels peer identities from a file under a given path. More...
void	save_list_tunnels (struct GNUNET_MESSENGER_ListTunnels *tunnels, const char *path)
	Saves the list of tunnels peer identities to a file under a given path. More...

Detailed Description

messenger api: client and service implementation of GNUnet MESSENGER service

Author

Tobias Frisch

Definition in file messenger_api_list_tunnels.h.

Function Documentation

init_list_tunnels()

void init_list_tunnels

(

struct GNUNET_MESSENGER_ListTunnels *

tunnels

)

Initializes list of tunnels peer identities as empty list.

Parameters

[out]

tunnels

List of peer identities

Definition at line 29 of file messenger_api_list_tunnels.c.

{
  GNUNET_assert(tunnels);
 
  tunnels->head = NULL;
  tunnels->tail = NULL;
}

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

Referenced by create_room(), and create_srv_room().

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clear_list_tunnels()

void clear_list_tunnels

(

struct GNUNET_MESSENGER_ListTunnels *

tunnels

)

Clears the list of tunnels peer identities.

Parameters

[in/out]

tunnels List of peer identities

Definition at line 38 of file messenger_api_list_tunnels.c.

{
  GNUNET_assert(tunnels);
 
  struct GNUNET_MESSENGER_ListTunnel *element;
 
  for (element = tunnels->head; element; element = tunnels->head)
  {
    GNUNET_CONTAINER_DLL_remove(tunnels->head, tunnels->tail, element);
    GNUNET_PEER_change_rc (element->peer, -1);
    GNUNET_free(element);
  }
 
  tunnels->head = NULL;
  tunnels->tail = NULL;
}

References GNUNET_assert, GNUNET_CONTAINER_DLL_remove, GNUNET_free, GNUNET_PEER_change_rc(), GNUNET_MESSENGER_ListTunnels::head, GNUNET_MESSENGER_ListTunnel::peer, and GNUNET_MESSENGER_ListTunnels::tail.

Referenced by destroy_room(), and destroy_srv_room().

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add_to_list_tunnels()

void add_to_list_tunnels	(	struct GNUNET_MESSENGER_ListTunnels *	tunnels,
		const struct GNUNET_PeerIdentity *	peer
	)

Adds a specific peer from a tunnel to the end of the list.

Parameters

	[in/out]	tunnels List of peer identities
[in]	peer	Peer identity of tunnel

Definition at line 64 of file messenger_api_list_tunnels.c.

{
  GNUNET_assert((tunnels) && (peer));
 
  struct GNUNET_MESSENGER_ListTunnel *element = GNUNET_new(struct GNUNET_MESSENGER_ListTunnel);
 
  element->peer = GNUNET_PEER_intern (peer);
 
  GNUNET_CONTAINER_DLL_insert_sorted(struct GNUNET_MESSENGER_ListTunnel, compare_list_tunnels, NULL, tunnels->head,
                                     tunnels->tail, element);
}

References compare_list_tunnels(), GNUNET_assert, GNUNET_CONTAINER_DLL_insert_sorted, GNUNET_new, GNUNET_PEER_intern(), GNUNET_MESSENGER_ListTunnels::head, GNUNET_MESSENGER_ListTunnel::peer, peer, and GNUNET_MESSENGER_ListTunnels::tail.

Referenced by entry_handle_room_at(), handle_message_peer(), and load_list_tunnels().

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find_list_tunnels()

struct GNUNET_MESSENGER_ListTunnel* find_list_tunnels	(	struct GNUNET_MESSENGER_ListTunnels *	tunnels,
		const struct GNUNET_PeerIdentity *	peer,
		size_t *	index
	)

Searches linearly through the list of tunnels peer identities for matching a specific peer identity and returns the matching element of the list.

If no matching element is found, NULL gets returned.

If index is not NULL, index will be overridden with the numeric index of the found element in the list. If no matching element is found, index will contain the total amount of elements in the list.

Parameters

	[in/out]	tunnels List of peer identities
[in]	peer	Peer identity of tunnel
[out]	index	Index of found element (optional)

Returns

Element in the list with matching peer identity

Definition at line 78 of file messenger_api_list_tunnels.c.

{
  GNUNET_assert((tunnels) && (peer));
 
  struct GNUNET_MESSENGER_ListTunnel *element;
  struct GNUNET_PeerIdentity pid;
 
  if (index)
    *index = 0;
 
  for (element = tunnels->head; element; element = element->next)
  {
    GNUNET_PEER_resolve (element->peer, &pid);
 
    if (0 == GNUNET_memcmp(&pid, peer))
      return element;
 
    if (index)
      (*index) = (*index) + 1;
  }
 
  return NULL;
}

References GNUNET_assert, GNUNET_memcmp, GNUNET_PEER_resolve(), GNUNET_MESSENGER_ListTunnels::head, GNUNET_MESSENGER_ListTunnel::next, GNUNET_MESSENGER_ListTunnel::peer, peer, and pid.

Referenced by contains_list_tunnels(), handle_message_miss(), handle_miss_message(), and rebuild_srv_room_basement_structure().

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contains_list_tunnels()

int contains_list_tunnels	(	struct GNUNET_MESSENGER_ListTunnels *	tunnels,
		const struct GNUNET_PeerIdentity *	peer
	)

Tests linearly if the list of tunnels peer identities contains a specific peer identity and returns GNUNET_YES on success, otherwise GNUNET_NO.

Parameters

	[in/out]	tunnels List of peer identities
[in]	peer	Peer identity of tunnel

Returns

GNUNET_YES on success, otherwise GNUNET_NO

Definition at line 105 of file messenger_api_list_tunnels.c.

{
  GNUNET_assert((tunnels) && (peer));
 
  return find_list_tunnels (tunnels, peer, NULL) != NULL ? GNUNET_YES : GNUNET_NO;
}

References find_list_tunnels(), GNUNET_assert, GNUNET_NO, GNUNET_YES, and peer.

Referenced by callback_room_disconnect(), handle_message_peer(), and recv_message_info().

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remove_from_list_tunnels()

struct GNUNET_MESSENGER_ListTunnel* remove_from_list_tunnels	(	struct GNUNET_MESSENGER_ListTunnels *	tunnels,
		struct GNUNET_MESSENGER_ListTunnel *	element
	)

Removes a specific element from the list of tunnels peer identities and returns the next element in the list.

Parameters

[in/out]	tunnels List of peer identities
[in/out]	element Element of the list

Returns

Next element in the list

Definition at line 114 of file messenger_api_list_tunnels.c.

{
  GNUNET_assert((tunnels) && (element));
 
  struct GNUNET_MESSENGER_ListTunnel *next = element->next;
 
  GNUNET_CONTAINER_DLL_remove(tunnels->head, tunnels->tail, element);
  GNUNET_PEER_change_rc (element->peer, -1);
  GNUNET_free(element);
 
  return next;
}

References GNUNET_assert, GNUNET_CONTAINER_DLL_remove, GNUNET_free, GNUNET_PEER_change_rc(), GNUNET_MESSENGER_ListTunnels::head, GNUNET_MESSENGER_ListTunnel::next, GNUNET_MESSENGER_ListTunnel::peer, and GNUNET_MESSENGER_ListTunnels::tail.

Referenced by handle_message_miss(), handle_miss_message(), and rebuild_srv_room_basement_structure().

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load_list_tunnels()

void load_list_tunnels	(	struct GNUNET_MESSENGER_ListTunnels *	tunnels,
		const char *	path
	)

Loads the list of tunnels peer identities from a file under a given path.

Parameters

[out]	messages	List of hashes
[in]	path	Path of file

Definition at line 129 of file messenger_api_list_tunnels.c.

{
  GNUNET_assert((tunnels) && (path));
 
  if (GNUNET_YES != GNUNET_DISK_file_test (path))
    return;
 
  enum GNUNET_DISK_AccessPermissions permission = (GNUNET_DISK_PERM_USER_READ | GNUNET_DISK_PERM_USER_WRITE);
 
  struct GNUNET_DISK_FileHandle *handle = GNUNET_DISK_file_open(
      path, GNUNET_DISK_OPEN_READ, permission
  );
 
  if (!handle)
    return;
 
  GNUNET_DISK_file_seek(handle, 0, GNUNET_DISK_SEEK_SET);
 
  struct GNUNET_PeerIdentity peer;
  ssize_t len;
 
  do {
    len = GNUNET_DISK_file_read(handle, &peer, sizeof(peer));
 
    if (len != sizeof(peer))
      break;
 
    add_to_list_tunnels(tunnels, &peer);
  } while (len == sizeof(peer));
 
  GNUNET_DISK_file_close(handle);
}

References add_to_list_tunnels(), 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, len, and peer.

Referenced by load_srv_room().

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save_list_tunnels()

void save_list_tunnels	(	struct GNUNET_MESSENGER_ListTunnels *	tunnels,
		const char *	path
	)

Saves the list of tunnels peer identities to a file under a given path.

Parameters

[in]	messages	List of hashes
[in]	path	Path of file

Definition at line 164 of file messenger_api_list_tunnels.c.

{
  GNUNET_assert((tunnels) && (path));
 
  enum GNUNET_DISK_AccessPermissions permission = (GNUNET_DISK_PERM_USER_READ | GNUNET_DISK_PERM_USER_WRITE);
 
  struct GNUNET_DISK_FileHandle *handle = GNUNET_DISK_file_open(
      path, GNUNET_DISK_OPEN_CREATE | GNUNET_DISK_OPEN_WRITE, permission
  );
 
  if (!handle)
    return;
 
  GNUNET_DISK_file_seek(handle, 0, GNUNET_DISK_SEEK_SET);
 
  struct GNUNET_MESSENGER_ListTunnel *element;
  struct GNUNET_PeerIdentity pid;
 
  for (element = tunnels->head; element; element = element->next)
  {
    GNUNET_PEER_resolve (element->peer, &pid);
 
    GNUNET_DISK_file_write(handle, &pid, sizeof(pid));
  }
 
  GNUNET_DISK_file_sync(handle);
  GNUNET_DISK_file_close(handle);
}

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, GNUNET_PEER_resolve(), handle, GNUNET_MESSENGER_ListTunnels::head, GNUNET_MESSENGER_ListTunnel::next, GNUNET_MESSENGER_ListTunnel::peer, and pid.

Referenced by save_srv_room().

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