GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 2, or (at your
+ by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
struct GNUNET_CONNECTION_Handle;
+/**
+ * Credentials for UNIX domain sockets.
+ */
+struct GNUNET_CONNECTION_Credentials
+{
+ /**
+ * UID of the other end of the connection.
+ */
+ uid_t uid;
+
+ /**
+ * GID of the other end of the connection.
+ */
+ gid_t gid;
+};
+
+
/**
* Function to call for access control checks.
*
* @param cls closure
+ * @param ucred credentials, if available, otherwise NULL
* @param addr address
* @param addrlen length of address
* @return GNUNET_YES to allow, GNUNET_NO to deny, GNUNET_SYSERR
* for unknown address family (will be denied).
*/
typedef int (*GNUNET_CONNECTION_AccessCheck) (void *cls,
- const struct sockaddr * addr,
- socklen_t addrlen);
+ const struct
+ GNUNET_CONNECTION_Credentials *
+ ucred,
+ const struct sockaddr * addr,
+ socklen_t addrlen);
/**
* @param addrlen size of addr
* @param errCode value of errno (on errors receiving)
*/
-typedef void (*GNUNET_CONNECTION_Receiver) (void *cls,
- const void *buf,
- size_t available,
- const struct sockaddr * addr,
- socklen_t addrlen, int errCode);
+typedef void (*GNUNET_CONNECTION_Receiver) (void *cls, const void *buf,
+ size_t available,
+ const struct sockaddr * addr,
+ socklen_t addrlen, int errCode);
/**
* Set the persist option on this connection handle. Indicates
* that the underlying socket or fd should never really be closed.
* Used for indicating process death.
*
- * @param sock the connection to set persistent
+ * @param connection the connection to set persistent
*/
void
-GNUNET_CONNECTION_persist_(struct GNUNET_CONNECTION_Handle *sock);
+GNUNET_CONNECTION_persist_ (struct GNUNET_CONNECTION_Handle *connection);
/**
- * Create a socket handle by boxing an existing OS socket. The OS
+ * Disable the "CORK" feature for communication with the given socket,
+ * forcing the OS to immediately flush the buffer on transmission
+ * instead of potentially buffering multiple messages. Essentially
+ * reduces the OS send buffers to zero.
+ * Used to make sure that the last messages sent through the connection
+ * reach the other side before the process is terminated.
+ *
+ * @param connection the connection to make flushing and blocking
+ * @return GNUNET_OK on success
+ */
+int
+GNUNET_CONNECTION_disable_corking (struct GNUNET_CONNECTION_Handle *connection);
+
+
+/**
+ * Create a connection handle by boxing an existing OS socket. The OS
* socket should henceforth be no longer used directly.
- * GNUNET_socket_destroy will close it.
+ * GNUNET_CONNECTION_destroy will close it.
*
- * @param sched scheduler to use
* @param osSocket existing socket to box
* @return the boxed socket handle
*/
-struct GNUNET_CONNECTION_Handle
- *GNUNET_CONNECTION_create_from_existing (struct
- GNUNET_SCHEDULER_Handle
- *sched,
- struct
- GNUNET_NETWORK_Handle
- *osSocket);
+struct GNUNET_CONNECTION_Handle *
+GNUNET_CONNECTION_create_from_existing (struct GNUNET_NETWORK_Handle *osSocket);
/**
- * Create a socket handle by accepting on a listen socket. This
+ * Create a connection handle by accepting on a listen socket. This
* function may block if the listen socket has no connection ready.
*
- * @param sched scheduler to use
* @param access function to use to check if access is allowed
* @param access_cls closure for access
* @param lsock listen socket
- * @return the socket handle, NULL on error (for example, access refused)
+ * @return the connection handle, NULL on error (for example, access refused)
*/
-struct GNUNET_CONNECTION_Handle
- *GNUNET_CONNECTION_create_from_accept (struct
- GNUNET_SCHEDULER_Handle
- *sched,
- GNUNET_CONNECTION_AccessCheck
- access, void *access_cls,
- struct
- GNUNET_NETWORK_Handle
- *lsock);
+struct GNUNET_CONNECTION_Handle *
+GNUNET_CONNECTION_create_from_accept (GNUNET_CONNECTION_AccessCheck access,
+ void *access_cls,
+ struct GNUNET_NETWORK_Handle *lsock);
/**
- * Create a socket handle by (asynchronously) connecting to a host.
+ * Create a connection handle by (asynchronously) connecting to a host.
* This function returns immediately, even if the connection has not
* yet been established. This function only creates TCP connections.
*
- * @param sched scheduler to use
* @param cfg configuration to use
* @param hostname name of the host to connect to
* @param port port to connect to
- * @return the socket handle
+ * @return the connection handle
*/
-struct GNUNET_CONNECTION_Handle
- *GNUNET_CONNECTION_create_from_connect (struct GNUNET_SCHEDULER_Handle *sched,
- const struct GNUNET_CONFIGURATION_Handle *cfg,
- const char *hostname,
- uint16_t port);
+struct GNUNET_CONNECTION_Handle *
+GNUNET_CONNECTION_create_from_connect (const struct GNUNET_CONFIGURATION_Handle
+ *cfg, const char *hostname,
+ uint16_t port);
/**
- * Create a socket handle by connecting to a UNIX domain service.
+ * Create a connection handle by connecting to a UNIX domain service.
* This function returns immediately, even if the connection has not
* yet been established. This function only creates UNIX connections.
*
- * @param sched scheduler to use
* @param cfg configuration to use
* @param unixpath path to connect to)
- * @return the socket handle, NULL on systems without UNIX support
+ * @return the connection handle, NULL on systems without UNIX support
*/
struct GNUNET_CONNECTION_Handle *
-GNUNET_CONNECTION_create_from_connect_to_unixpath (struct GNUNET_SCHEDULER_Handle *sched,
- const struct
- GNUNET_CONFIGURATION_Handle *cfg,
- const char *unixpath);
+GNUNET_CONNECTION_create_from_connect_to_unixpath (const struct
+ GNUNET_CONFIGURATION_Handle
+ *cfg, const char *unixpath);
/**
- * Create a socket handle by (asynchronously) connecting to a host.
+ * Create a connection handle by (asynchronously) connecting to a host.
* This function returns immediately, even if the connection has not
* yet been established. This function only creates TCP connections.
*
- * @param sched scheduler to use
* @param af_family address family to use
* @param serv_addr server address
* @param addrlen length of server address
- * @return the socket handle
+ * @return the connection handle
*/
-struct GNUNET_CONNECTION_Handle
- *GNUNET_CONNECTION_create_from_sockaddr (struct
- GNUNET_SCHEDULER_Handle
- *sched, int af_family,
- const struct sockaddr
- *serv_addr,
- socklen_t addrlen);
+struct GNUNET_CONNECTION_Handle *
+GNUNET_CONNECTION_create_from_sockaddr (int af_family,
+ const struct sockaddr *serv_addr,
+ socklen_t addrlen);
/**
- * Check if socket is valid (no fatal errors have happened so far).
- * Note that a socket that is still trying to connect is considered
+ * Check if connection is valid (no fatal errors have happened so far).
+ * Note that a connection that is still trying to connect is considered
* valid.
*
- * @param sock socket to check
+ * @param connection handle to check
* @return GNUNET_YES if valid, GNUNET_NO otherwise
*/
-int GNUNET_CONNECTION_check (struct GNUNET_CONNECTION_Handle
- *sock);
+int
+GNUNET_CONNECTION_check (struct GNUNET_CONNECTION_Handle *connection);
/**
* Obtain the network address of the other party.
*
- * @param sock the client to get the address for
+ * @param connection the client to get the address for
* @param addr where to store the address
* @param addrlen where to store the length of the address
* @return GNUNET_OK on success
*/
-int GNUNET_CONNECTION_get_address (struct
- GNUNET_CONNECTION_Handle
- *sock, void **addr,
- size_t * addrlen);
+int
+GNUNET_CONNECTION_get_address (struct GNUNET_CONNECTION_Handle *connection,
+ void **addr, size_t * addrlen);
/**
- * Close the socket and free associated resources. Pending
- * transmissions may be completed or dropped depending on the
- * arguments. If a receive call is pending and should
- * NOT be completed, 'GNUNET_CONNECTION_receive_cancel'
- * should be called explicitly first.
+ * Close the connection and free associated resources. There must
+ * not be any pending requests for reading or writing to the
+ * connection at this time.
*
- * @param sock socket to destroy
- * @param finish_pending_write should pending writes be completed or aborted?
- * (this applies to transmissions where the data has already been
- * read from the application; all other transmissions should be
- * aborted using 'GNUNET_CONNECTION_notify_transmit_ready_cancel').
+ * @param connection connection to destroy
*/
void
-GNUNET_CONNECTION_destroy (struct GNUNET_CONNECTION_Handle *sock,
- int finish_pending_write);
+GNUNET_CONNECTION_destroy (struct GNUNET_CONNECTION_Handle *connection);
/**
- * Receive data from the given socket. Note that this function will
+ * Receive data from the given connection. Note that this function will
* call "receiver" asynchronously using the scheduler. It will
* "immediately" return. Note that there MUST only be one active
- * receive call per socket at any given point in time (so do not
+ * receive call per connection at any given point in time (so do not
* call receive again until the receiver callback has been invoked).
*
- * @param sock socket handle
+ * @param connection connection handle
* @param max maximum number of bytes to read
* @param timeout maximum amount of time to wait
* @param receiver function to call with received data
* @param receiver_cls closure for receiver
*/
void
-GNUNET_CONNECTION_receive (struct GNUNET_CONNECTION_Handle
- *sock, size_t max,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_CONNECTION_Receiver receiver,
- void *receiver_cls);
+GNUNET_CONNECTION_receive (struct GNUNET_CONNECTION_Handle *connection, size_t max,
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_CONNECTION_Receiver receiver,
+ void *receiver_cls);
/**
- * Cancel receive job on the given socket. Note that the
+ * Cancel receive job on the given connection. Note that the
* receiver callback must not have been called yet in order
* for the cancellation to be valid.
*
- * @param sock socket handle
+ * @param connection connection handle
* @return closure of the original receiver callback closure
*/
-void *GNUNET_CONNECTION_receive_cancel (struct
- GNUNET_CONNECTION_Handle
- *sock);
+void *
+GNUNET_CONNECTION_receive_cancel (struct GNUNET_CONNECTION_Handle *connection);
/**
- * Function called to notify a client about the socket
+ * Function called to notify a client about the connection
* begin ready to queue more data. "buf" will be
- * NULL and "size" zero if the socket was closed for
+ * NULL and "size" zero if the connection was closed for
* writing in the meantime.
*
* @param cls closure
* @param buf where the callee should write the message
* @return number of bytes written to buf
*/
-typedef size_t (*GNUNET_CONNECTION_TransmitReadyNotify) (void *cls,
- size_t size, void *buf);
+typedef size_t (*GNUNET_CONNECTION_TransmitReadyNotify) (void *cls, size_t size,
+ void *buf);
/**
struct GNUNET_CONNECTION_TransmitHandle;
/**
- * Ask the socket to call us once the specified number of bytes
+ * Ask the connection to call us once the specified number of bytes
* are free in the transmission buffer. May call the notify
* method immediately if enough space is available. Note that
* this function will abort if "size" is greater than
* GNUNET_SERVER_MAX_MESSAGE_SIZE.
*
* Note that "notify" will be called either when enough
- * buffer space is available OR when the socket is destroyed.
+ * buffer space is available OR when the connection is destroyed.
* The size parameter given to notify is guaranteed to be
* larger or equal to size if the buffer is ready, or zero
- * if the socket was destroyed (or at least closed for
+ * if the connection was destroyed (or at least closed for
* writing). Finally, any time before 'notify' is called, a
* client may call "notify_transmit_ready_cancel" to cancel
* the transmission request.
* time. Notify will be run with the same scheduler priority
* as that of the caller.
*
- * @param sock socket
+ * @param connection connection
* @param size number of bytes to send
* @param timeout after how long should we give up (and call
* notify with buf NULL and size 0)?
* @return non-NULL if the notify callback was queued,
* NULL if we are already going to notify someone else (busy)
*/
-struct GNUNET_CONNECTION_TransmitHandle
- *GNUNET_CONNECTION_notify_transmit_ready (struct
- GNUNET_CONNECTION_Handle
- *sock, size_t size,
- struct
- GNUNET_TIME_Relative
- timeout,
- GNUNET_CONNECTION_TransmitReadyNotify
- notify, void *notify_cls);
+struct GNUNET_CONNECTION_TransmitHandle *
+GNUNET_CONNECTION_notify_transmit_ready (struct GNUNET_CONNECTION_Handle *connection,
+ size_t size,
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_CONNECTION_TransmitReadyNotify
+ notify, void *notify_cls);
/**
* Cancel the specified transmission-ready
* notification.
*
- * @param h handle for notification to cancel
+ * @param th handle for notification to cancel
*/
void
GNUNET_CONNECTION_notify_transmit_ready_cancel (struct
- GNUNET_CONNECTION_TransmitHandle
- *h);
+ GNUNET_CONNECTION_TransmitHandle
+ *th);
-/**
- * Configure this connection to ignore shutdown signals.
- *
- * @param sock socket handle
- * @param do_ignore GNUNET_YES to ignore, GNUNET_NO to restore default
- */
-void
-GNUNET_CONNECTION_ignore_shutdown (struct GNUNET_CONNECTION_Handle *sock,
- int do_ignore);
-
#if 0 /* keep Emacsens' auto-indent happy */
{
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