AmpereMeter - Example self-announcing webserver which controls …

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Dirk-Willem van Gulik (NXP/mbed) / Mbed 2 deprecated AmpereMeter

Example self-announcing webserver which controls a servo through a smallHTML userinterface.

lwip/include/lwip/pbuf.h@0:a259777c45a3, 2010-08-14 (annotated)

Committer:: dirkx
Date:: Sat Aug 14 15:56:01 2010 +0000
Revision:: 0:a259777c45a3

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User	Revision	Line number	New contents of line
dirkx	0:a259777c45a3	1	/*
dirkx	0:a259777c45a3	2	* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
dirkx	0:a259777c45a3	3	* All rights reserved.
dirkx	0:a259777c45a3	4	*
dirkx	0:a259777c45a3	5	* Redistribution and use in source and binary forms, with or without modification,
dirkx	0:a259777c45a3	6	* are permitted provided that the following conditions are met:
dirkx	0:a259777c45a3	7	*
dirkx	0:a259777c45a3	8	* 1. Redistributions of source code must retain the above copyright notice,
dirkx	0:a259777c45a3	9	* this list of conditions and the following disclaimer.
dirkx	0:a259777c45a3	10	* 2. Redistributions in binary form must reproduce the above copyright notice,
dirkx	0:a259777c45a3	11	* this list of conditions and the following disclaimer in the documentation
dirkx	0:a259777c45a3	12	* and/or other materials provided with the distribution.
dirkx	0:a259777c45a3	13	* 3. The name of the author may not be used to endorse or promote products
dirkx	0:a259777c45a3	14	* derived from this software without specific prior written permission.
dirkx	0:a259777c45a3	15	*
dirkx	0:a259777c45a3	16	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
dirkx	0:a259777c45a3	17	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
dirkx	0:a259777c45a3	18	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
dirkx	0:a259777c45a3	19	* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
dirkx	0:a259777c45a3	20	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
dirkx	0:a259777c45a3	21	* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
dirkx	0:a259777c45a3	22	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
dirkx	0:a259777c45a3	23	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
dirkx	0:a259777c45a3	24	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
dirkx	0:a259777c45a3	25	* OF SUCH DAMAGE.
dirkx	0:a259777c45a3	26	*
dirkx	0:a259777c45a3	27	* This file is part of the lwIP TCP/IP stack.
dirkx	0:a259777c45a3	28	*
dirkx	0:a259777c45a3	29	* Author: Adam Dunkels <adam@sics.se>
dirkx	0:a259777c45a3	30	*
dirkx	0:a259777c45a3	31	*/
dirkx	0:a259777c45a3	32
dirkx	0:a259777c45a3	33	#ifndef __LWIP_PBUF_H__
dirkx	0:a259777c45a3	34	#define __LWIP_PBUF_H__
dirkx	0:a259777c45a3	35
dirkx	0:a259777c45a3	36	#include "lwip/opt.h"
dirkx	0:a259777c45a3	37	#include "lwip/err.h"
dirkx	0:a259777c45a3	38
dirkx	0:a259777c45a3	39	#ifdef __cplusplus
dirkx	0:a259777c45a3	40	extern "C" {
dirkx	0:a259777c45a3	41	#endif
dirkx	0:a259777c45a3	42
dirkx	0:a259777c45a3	43	#define PBUF_TRANSPORT_HLEN 20
dirkx	0:a259777c45a3	44	#define PBUF_IP_HLEN 20
dirkx	0:a259777c45a3	45
dirkx	0:a259777c45a3	46	typedef enum {
dirkx	0:a259777c45a3	47	PBUF_TRANSPORT,
dirkx	0:a259777c45a3	48	PBUF_IP,
dirkx	0:a259777c45a3	49	PBUF_LINK,
dirkx	0:a259777c45a3	50	PBUF_RAW
dirkx	0:a259777c45a3	51	} pbuf_layer;
dirkx	0:a259777c45a3	52
dirkx	0:a259777c45a3	53	typedef enum {
dirkx	0:a259777c45a3	54	PBUF_RAM, /* pbuf data is stored in RAM */
dirkx	0:a259777c45a3	55	PBUF_ROM, /* pbuf data is stored in ROM */
dirkx	0:a259777c45a3	56	PBUF_REF, /* pbuf comes from the pbuf pool */
dirkx	0:a259777c45a3	57	PBUF_POOL /* pbuf payload refers to RAM */
dirkx	0:a259777c45a3	58	} pbuf_type;
dirkx	0:a259777c45a3	59
dirkx	0:a259777c45a3	60
dirkx	0:a259777c45a3	61	/** indicates this packet's data should be immediately passed to the application */
dirkx	0:a259777c45a3	62	#define PBUF_FLAG_PUSH 0x01U
dirkx	0:a259777c45a3	63
dirkx	0:a259777c45a3	64	struct pbuf {
dirkx	0:a259777c45a3	65	/** next pbuf in singly linked pbuf chain */
dirkx	0:a259777c45a3	66	struct pbuf *next;
dirkx	0:a259777c45a3	67
dirkx	0:a259777c45a3	68	/** pointer to the actual data in the buffer */
dirkx	0:a259777c45a3	69	void *payload;
dirkx	0:a259777c45a3	70
dirkx	0:a259777c45a3	71	/**
dirkx	0:a259777c45a3	72	* total length of this buffer and all next buffers in chain
dirkx	0:a259777c45a3	73	* belonging to the same packet.
dirkx	0:a259777c45a3	74	*
dirkx	0:a259777c45a3	75	* For non-queue packet chains this is the invariant:
dirkx	0:a259777c45a3	76	* p->tot_len == p->len + (p->next? p->next->tot_len: 0)
dirkx	0:a259777c45a3	77	*/
dirkx	0:a259777c45a3	78	u16_t tot_len;
dirkx	0:a259777c45a3	79
dirkx	0:a259777c45a3	80	/** length of this buffer */
dirkx	0:a259777c45a3	81	u16_t len;
dirkx	0:a259777c45a3	82
dirkx	0:a259777c45a3	83	/** pbuf_type as u8_t instead of enum to save space */
dirkx	0:a259777c45a3	84	u8_t /pbuf_type/ type;
dirkx	0:a259777c45a3	85
dirkx	0:a259777c45a3	86	/** misc flags */
dirkx	0:a259777c45a3	87	u8_t flags;
dirkx	0:a259777c45a3	88
dirkx	0:a259777c45a3	89	/**
dirkx	0:a259777c45a3	90	* the reference count always equals the number of pointers
dirkx	0:a259777c45a3	91	* that refer to this pbuf. This can be pointers from an application,
dirkx	0:a259777c45a3	92	* the stack itself, or pbuf->next pointers from a chain.
dirkx	0:a259777c45a3	93	*/
dirkx	0:a259777c45a3	94	u16_t ref;
dirkx	0:a259777c45a3	95
dirkx	0:a259777c45a3	96	};
dirkx	0:a259777c45a3	97
dirkx	0:a259777c45a3	98	/* Initializes the pbuf module. This call is empty for now, but may not be in future. */
dirkx	0:a259777c45a3	99	#define pbuf_init()
dirkx	0:a259777c45a3	100
dirkx	0:a259777c45a3	101	struct pbuf *pbuf_alloc(pbuf_layer l, u16_t size, pbuf_type type);
dirkx	0:a259777c45a3	102	void pbuf_realloc(struct pbuf *p, u16_t size);
dirkx	0:a259777c45a3	103	u8_t pbuf_header(struct pbuf *p, s16_t header_size);
dirkx	0:a259777c45a3	104	void pbuf_ref(struct pbuf *p);
dirkx	0:a259777c45a3	105	void pbuf_ref_chain(struct pbuf *p);
dirkx	0:a259777c45a3	106	u8_t pbuf_free(struct pbuf *p);
dirkx	0:a259777c45a3	107	u8_t pbuf_clen(struct pbuf *p);
dirkx	0:a259777c45a3	108	void pbuf_cat(struct pbuf head, struct pbuf tail);
dirkx	0:a259777c45a3	109	void pbuf_chain(struct pbuf head, struct pbuf tail);
dirkx	0:a259777c45a3	110	struct pbuf pbuf_dechain(struct pbuf p);
dirkx	0:a259777c45a3	111	err_t pbuf_copy(struct pbuf p_to, struct pbuf p_from);
dirkx	0:a259777c45a3	112	u16_t pbuf_copy_partial(struct pbuf p, void dataptr, u16_t len, u16_t offset);
dirkx	0:a259777c45a3	113	err_t pbuf_take(struct pbuf buf, const void dataptr, u16_t len);
dirkx	0:a259777c45a3	114	struct pbuf pbuf_coalesce(struct pbuf p, pbuf_layer layer);
dirkx	0:a259777c45a3	115
dirkx	0:a259777c45a3	116	#ifdef __cplusplus
dirkx	0:a259777c45a3	117	}
dirkx	0:a259777c45a3	118	#endif
dirkx	0:a259777c45a3	119
dirkx	0:a259777c45a3	120	#endif /* __LWIP_PBUF_H__ */

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	14 Aug 2010
Imports:	49
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	2
Followers:	1

lwip/include/lwip/pbuf.h@0:a259777c45a3, 2010-08-14 (annotated)

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