WebSVN – HelenOS – Blame – //branches/network/uspace/srv/net/structures/packet/packet_client.h

Rev	Author	Line No.	Line
3901	mejdrech	1	/*
3912	mejdrech	2	* Copyright (c) 2009 Lukas Mejdrech
3901	mejdrech	3	* All rights reserved.
		4	*
		5	* Redistribution and use in source and binary forms, with or without
		6	* modification, are permitted provided that the following conditions
		7	* are met:
		8	*
		9	* - Redistributions of source code must retain the above copyright
		10	* notice, this list of conditions and the following disclaimer.
		11	* - Redistributions in binary form must reproduce the above copyright
		12	* notice, this list of conditions and the following disclaimer in the
		13	* documentation and/or other materials provided with the distribution.
		14	* - The name of the author may not be used to endorse or promote products
		15	* derived from this software without specific prior written permission.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
		18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
		19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
		20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
		21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
		22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
		26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*/
		28
3912	mejdrech	29	/** @addtogroup packet
3901	mejdrech	30	* @{
		31	*/
		32
		33	/** @file
3912	mejdrech	34	* Packet client.
		35	* The hosting module has to be compiled with both the packet.c and the packet_client.c source files.
		36	* To function correctly, initialization of the packet map by the pm_init() function has to happen at the first place.
		37	* The module should not send the packet messages to the packet server but use the functions provided.
		38	* The packet map should be released by the pm_destroy() function during the module termination.
3914	mejdrech	39	* The packets and the packet queues can't be locked at all.
		40	* The processing modules should process them sequentially - by passing the packets to the next module and stopping using the passed ones.
3912	mejdrech	41	* @see packet.h
3901	mejdrech	42	*/
		43
		44	#ifndef __NET_PACKET_CLIENT_H__
		45	#define __NET_PACKET_CLIENT_H__
		46
		47	#include "packet.h"
		48
4704	mejdrech	49	/** @name Packet client interface
		50	*/
		51	/@{/
		52
3912	mejdrech	53	/** Allocates the specified type right before the actual packet content and returns its pointer.
		54	* The wrapper of the packet_prepend() function.
		55	* @param packet The packet to be used. Input parameter.
		56	* @param type The type to be allocated at the beginning of the packet content. Input parameter.
		57	* @returns The typed pointer to the allocated memory.
		58	* @returns NULL if the packet is not valid.
		59	* @returns NULL if there is not enough memory left.
		60	*/
3990	mejdrech	61	#define PACKET_PREFIX( packet, type ) ( type * ) packet_prefix(( packet ), sizeof( type ))
3901	mejdrech	62
3912	mejdrech	63	/** Allocates the specified type right after the actual packet content and returns its pointer.
		64	* The wrapper of the packet_append() function.
		65	* @param packet The packet to be used. Input parameter.
		66	* @param type The type to be allocated at the end of the packet content. Input parameter.
		67	* @returns The typed pointer to the allocated memory.
		68	* @returns NULL if the packet is not valid.
		69	* @returns NULL if there is not enough memory left.
		70	*/
3990	mejdrech	71	#define PACKET_SUFFIX( packet, type ) ( type * ) packet_suffix(( packet ), sizeof( type ))
3912	mejdrech	72
		73	/** Trims the actual packet content by the specified prefix and suffix types.
		74	* The wrapper of the packet_trim() function.
		75	* @param packet The packet to be trimmed. Input parameter.
		76	* @param prefix The type of the prefix to be removed from the beginning of the packet content. Input parameter.
		77	* @param suffix The type of the suffix to be removed from the end of the packet content. Input parameter.
		78	* @returns EOK on success.
		79	* @returns EINVAL if the packet is not valid.
		80	* @returns EINVAL if there is not enough memory left.
		81	*/
		82	#define PACKET_TRIM( packet, prefix, suffix ) packet_trim(( packet ), sizeof( prefix ), sizeof( suffix ))
		83
		84	/** Allocates the specified space right before the actual packet content and returns its pointer.
		85	* @param packet The packet to be used. Input parameter.
		86	* @param length The space length to be allocated at the beginning of the packet content. Input parameter.
		87	* @returns The pointer to the allocated memory.
		88	* @returns NULL if there is not enough memory left.
		89	*/
		90	void * packet_prefix( packet_t packet, size_t length );
		91
		92	/** Allocates the specified space right after the actual packet content and returns its pointer.
		93	* @param packet The packet to be used. Input parameter.
		94	* @param length The space length to be allocated at the end of the packet content. Input parameter.
		95	* @returns The pointer to the allocated memory.
		96	* @returns NULL if there is not enough memory left.
		97	*/
		98	void * packet_suffix( packet_t packet, size_t length );
		99
		100	/** Trims the actual packet content by the specified prefix and suffix lengths.
		101	* @param packet The packet to be trimmed. Input parameter.
		102	* @param prefix The prefix length to be removed from the beginning of the packet content. Input parameter.
		103	* @param suffix The suffix length to be removed from the end of the packet content. Input parameter.
		104	* @returns EOK on success.
		105	* @returns EINVAL if the packet is not valid.
		106	* @returns ENOMEM if there is not enough memory left.
		107	*/
		108	int packet_trim( packet_t packet, size_t prefix, size_t suffix );
		109
		110	/** Copies the specified data to the beginning of the actual packet content.
		111	* Pushes the content end if needed.
		112	* @param packet The packet to be filled. Input parameter.
		113	* @param data The data to be copied. Input parameter.
		114	* @param length The length of the copied data. Input parameter.
		115	* @returns EOK on success.
		116	* @returns EINVAL if the packet is not valid.
		117	* @returns ENOMEM if there is not enough memory left.
		118	*/
3901	mejdrech	119	int packet_copy_data( packet_t packet, const void * data, size_t length );
3912	mejdrech	120
		121	/** Returns the packet identifier.
		122	* @param packet The packet. Input parameter.
		123	* @returns The packet identifier.
		124	* @returns Zero (0) if the packet is not valid.
		125	*/
		126	packet_id_t packet_get_id( const packet_t packet );
		127
		128	/** Returns the packet content length.
		129	* @param packet The packet. Input parameter.
		130	* @returns The packet content length in bytes.
		131	* @returns Zero (0) if the packet is not valid.
		132	*/
3901	mejdrech	133	size_t packet_get_data_length( const packet_t packet );
3912	mejdrech	134
		135	/** Returns the pointer to the beginning of the packet content.
		136	* @param packet The packet. Input parameter.
		137	* @returns The pointer to the beginning of the packet content.
		138	* @returns NULL if the packet is not valid.
		139	*/
3901	mejdrech	140	void * packet_get_data( const packet_t packet );
3912	mejdrech	141
		142	/** Returns the stored packet addresses and their length.
		143	* @param packet The packet. Input parameter.
4395	mejdrech	144	* @param src The source address. May be NULL if not desired. Output parameter.
		145	* @param dest The destination address. May be NULL if not desired. Output parameter.
		146	* @returns The stored addresses length.
3912	mejdrech	147	* @returns Zero (0) if the addresses are not present.
		148	* @returns EINVAL if the packet is not valid.
		149	*/
3901	mejdrech	150	int packet_get_addr( const packet_t packet, uint8_t src, uint8_t dest );
3912	mejdrech	151
		152	/** Sets the packet addresses.
		153	* @param packet The packet. Input parameter.
4395	mejdrech	154	* @param src The new source address. May be NULL. Input parameter.
		155	* @param dest The new destination address. May be NULL. Input parameter.
3912	mejdrech	156	* @param addr_len The addresses length.
		157	* @returns EOK on success.
		158	* @returns EINVAL if the packet is not valid.
		159	* @returns ENOMEM if there is not enough memory left.
		160	*/
3901	mejdrech	161	int packet_set_addr( packet_t packet, const uint8_t * src, const uint8_t * dest, size_t addr_len );
3912	mejdrech	162
		163	/** Translates the packet identifier to the packet reference.
		164	* Tries to find mapping first.
		165	* Contacts the packet server to share the packet if the mapping is not present.
		166	* @param phone The packet server module phone. Input parameter.
		167	* @param packet The packet reference. Output parameter.
		168	* @param packet_id The packet identifier. Input parameter.
		169	* @returns EOK on success.
		170	* @returns EINVAL if the packet parameter is NULL.
		171	* @returns Other error codes as defined for the NET_PACKET_GET_SIZE message.
4351	mejdrech	172	* @returns Other error codes as defined for the packet_return() function.
3912	mejdrech	173	*/
3901	mejdrech	174	int packet_translate( int phone, packet_ref packet, packet_id_t packet_id );
3912	mejdrech	175
		176	/** Obtains the packet of the given dimensions.
		177	* Contacts the packet server to return the appropriate packet.
		178	* @param phone The packet server module phone. Input parameter.
		179	* @param addr_len The source and destination addresses maximal length in bytes. Input parameter.
		180	* @param max_prefix The maximal prefix length in bytes. Input parameter.
		181	* @param max_content The maximal content length in bytes. Input parameter.
		182	* @param max_suffix The maximal suffix length in bytes. Input parameter.
		183	* @returns The packet reference.
		184	* @returns NULL on error.
		185	*/
3990	mejdrech	186	packet_t packet_get_4( int phone, size_t max_content, size_t addr_len, size_t max_prefix, size_t max_suffix );
3912	mejdrech	187
		188	/** Obtains the packet of the given content size.
		189	* Contacts the packet server to return the appropriate packet.
		190	* @param phone The packet server module phone. Input parameter.
		191	* @param content The maximal content length in bytes. Input parameter.
		192	* @returns The packet reference.
		193	* @returns NULL on error.
		194	*/
3990	mejdrech	195	packet_t packet_get_1( int phone, size_t content );
3912	mejdrech	196
4075	mejdrech	197	/** Releases the packet queue.
		198	* All packets in the queue are marked as free for use.
		199	* The packet queue may be one packet only.
		200	* The module should not use the packets after this point until they are received or obtained again.
3912	mejdrech	201	* @param phone The packet server module phone. Input parameter.
		202	* @param packet_id The packet identifier. Input parameter.
		203	*/
4192	mejdrech	204	void pq_release( int phone, packet_id_t packet_id );
3901	mejdrech	205
4704	mejdrech	206	/@}/
		207
3901	mejdrech	208	#endif
		209
		210	/** @}
		211	*/

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