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| -rw-r--r-- | lib/libdvben50221/en50221_session.h | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/lib/libdvben50221/en50221_session.h b/lib/libdvben50221/en50221_session.h new file mode 100644 index 0000000..7b33518 --- /dev/null +++ b/lib/libdvben50221/en50221_session.h @@ -0,0 +1,232 @@ +/* + en50221 encoder An implementation for libdvb + an implementation for the en50221 session layer + + Copyright (C) 2004, 2005 Manu Abraham <abraham.manu@gmail.com> + Copyright (C) 2005 Julian Scheel (julian@jusst.de) + Copyright (C) 2006 Andrew de Quincey (adq_dvb@lidskialf.net) + + This library is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of + the License, or (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +*/ + + +#ifndef __EN50221_SESSION_H__ +#define __EN50221_SESSION_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +#include <stdlib.h> +#include <stdint.h> +#include <libdvben50221/en50221_transport.h> + +#define S_SCALLBACK_REASON_CAMCONNECTING 0x00 // CAM originated session connecting to resource (check for availability) +#define S_SCALLBACK_REASON_CAMCONNECTED 0x01 // CAM originated session connection established succesfully +#define S_SCALLBACK_REASON_CAMCONNECTFAIL 0x02 // CAM originated session connection failed +#define S_SCALLBACK_REASON_CONNECTED 0x03 // Host originated session ACKed by CAM. +#define S_SCALLBACK_REASON_CONNECTFAIL 0x04 // Host originated session NACKed by CAM. +#define S_SCALLBACK_REASON_CLOSE 0x05 // Session closed +#define S_SCALLBACK_REASON_TC_CONNECT 0x06 // A host originated transport connection has been established. +#define S_SCALLBACK_REASON_TC_CAMCONNECT 0x07 // A CAM originated transport connection has been established. + + +/** + * Opaque type representing a session layer. + */ +struct en50221_session_layer; + +/** + * Type definition for resource callback function - called by session layer when data + * arrives for a particular resource. + * + * @param arg Private argument. + * @param slot_id Slot id concerned. + * @param session_number Session number. + * @param resource_id Resource id. + * @param data The data. + * @param data_length Length of data in bytes. + * @return 0 on success, or -1 on failure. + */ +typedef int (*en50221_sl_resource_callback) (void *arg, + uint8_t slot_id, + uint16_t session_number, + uint32_t resource_id, + uint8_t * data, + uint32_t data_length); + +/** + * Type definition for resource lookup callback function - used by the session layer to + * look up requested resources. + * + * @param arg Private argument. + * @param slot_id Slot id the request came from. + * @param requested_resource_id Resource id requested. + * @param callback_out Output parameter for pointer to resource callback function. + * @param arg_out Output parameter for arg to pass to resource callback. + * @param resource_id_out Set this to the resource_id connected to (e.g. may differ from resource_id due to versions). + * @return 0 on success, + * -1 if the resource was not found, + * -2 if it exists, but had a lower version, or + * -3 if it exists, but was unavailable. + */ +typedef int (*en50221_sl_lookup_callback) (void *arg, + uint8_t slot_id, + uint32_t requested_resource_id, + en50221_sl_resource_callback * callback_out, + void **arg_out, + uint32_t *resource_id_out); + + +/** + * Type definition for session callback function - used to inform top level code when a CAM + * modifies a session to a resource. + * + * @param arg Private argument. + * @param reason One of the S_CCALLBACK_REASON_* values above. + * @param slot_id Slot id concerned. + * @param session_number Session number. + * @param resource_id Resource id. + * @return 0 on sucess, or -1 on error. + */ +typedef int (*en50221_sl_session_callback) (void *arg, int reason, + uint8_t slot_id, + uint16_t session_number, + uint32_t resource_id); + +/** + * Construct a new instance of the session layer. + * + * @param tl The en50221_transport_layer instance to use. + * @param max_sessions Maximum number of sessions supported. + * @return The en50221_session_layer instance, or NULL on error. + */ +extern struct en50221_session_layer *en50221_sl_create(struct en50221_transport_layer *tl, + uint32_t max_sessions); + +/** + * Destroy an instance of the session layer. + * + * @param tl The en50221_session_layer instance. + */ +extern void en50221_sl_destroy(struct en50221_session_layer *sl); + +/** + * Gets the last error. + * + * @param tl The en50221_session_layer instance. + * @return One of the EN50221ERR_* values. + */ +extern int en50221_sl_get_error(struct en50221_session_layer *tl); + +/** + * Register the callback for resource lookup. + * + * @param sl The en50221_session_layer instance. + * @param callback The callback. Set to NULL to remove the callback completely. + * @param arg Private data passed as arg0 of the callback. + */ +extern void en50221_sl_register_lookup_callback(struct en50221_session_layer *sl, + en50221_sl_lookup_callback callback, + void *arg); + +/** + * Register the callback for informing about session from a cam. + * + * @param sl The en50221_session_layer instance. + * @param callback The callback. Set to NULL to remove the callback completely. + * @param arg Private data passed as arg0 of the callback. + */ +extern void en50221_sl_register_session_callback(struct en50221_session_layer *sl, + en50221_sl_session_callback callback, + void *arg); + +/** + * Create a new session to a module in a slot. + * + * @param sl The en50221_session_layer instance. + * @param slot The slot to connect to. + * @param resource_id The resource_id to connect to. + * @param callback The callback for received data. + * @param arg Argument to pass to the callback. + * @return The new session_number, or -1 on error. + */ +extern int en50221_sl_create_session(struct en50221_session_layer *sl, int slot_id, + uint8_t connection_id, + uint32_t resource_id, + en50221_sl_resource_callback callback, + void *arg); + +/** + * Destroy a session. + * + * @param sl The en50221_session_layer instance. + * @param session_number The session to destroy. + * @return 0 on success, or -1 on error. + */ +extern int en50221_sl_destroy_session(struct en50221_session_layer *sl, + uint16_t session_number); + +/** + * this function is used to take a data-block, pack into + * into a SPDU (SESSION_NUMBER) and send it to the transport layer + * + * @param sl The en50221_session_layer instance to use. + * @param session_number Session number concerned. + * @param data Data to send. + * @param data_length Length of data in bytes. + * @return 0 on success, or -1 on error. + */ +extern int en50221_sl_send_data(struct en50221_session_layer *sl, + uint16_t session_number, + uint8_t * data, + uint16_t data_length); + +/** + * this function is used to take a data-block, pack into + * into a SPDU (SESSION_NUMBER) and send it to the transport layer + * + * @param sl The en50221_session_layer instance to use. + * @param session_number Session number concerned. + * @param vector IOVEC to send. + * @param iov_count Number of elements in io vector. + * @return 0 on success, or -1 on error. + */ +extern int en50221_sl_send_datav(struct en50221_session_layer *sl, + uint16_t session_number, + struct iovec *vector, + int iov_count); + +/** + * this is used to send a message to all sessions, linked + * to resource res + * + * @param tl The en50221_session_layer instance to use. + * @param slot_id Set to -1 to send to any slot. Other values will send to only that slot. + * @param resource_id Resource id concerned. + * @param data Data to send. + * @param data_length Length of data in bytes. + * @return 0 on success, or -1 on error. + */ +extern int en50221_sl_broadcast_data(struct en50221_session_layer *sl, + int slot_id, + uint32_t resource_id, + uint8_t * data, + uint16_t data_length); + +#ifdef __cplusplus +} +#endif +#endif |