UDPtest - Some quick code to use UDP-only (no TCP) with mBe…

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Some quick code to use UDP-only (no TCP) with mBed. Echos received packets and sends packets when a button is pressed

Core/lwIP/include/lwip/pbuf.h@0:a548a085de55, 2010-03-14 (annotated)

Committer:: pehrhovey
Date:: Sun Mar 14 00:54:12 2010 +0000
Revision:: 0:a548a085de55

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User	Revision	Line number	New contents of line
pehrhovey	0:a548a085de55	1	/*
pehrhovey	0:a548a085de55	2	* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
pehrhovey	0:a548a085de55	3	* All rights reserved.
pehrhovey	0:a548a085de55	4	*
pehrhovey	0:a548a085de55	5	* Redistribution and use in source and binary forms, with or without modification,
pehrhovey	0:a548a085de55	6	* are permitted provided that the following conditions are met:
pehrhovey	0:a548a085de55	7	*
pehrhovey	0:a548a085de55	8	* 1. Redistributions of source code must retain the above copyright notice,
pehrhovey	0:a548a085de55	9	* this list of conditions and the following disclaimer.
pehrhovey	0:a548a085de55	10	* 2. Redistributions in binary form must reproduce the above copyright notice,
pehrhovey	0:a548a085de55	11	* this list of conditions and the following disclaimer in the documentation
pehrhovey	0:a548a085de55	12	* and/or other materials provided with the distribution.
pehrhovey	0:a548a085de55	13	* 3. The name of the author may not be used to endorse or promote products
pehrhovey	0:a548a085de55	14	* derived from this software without specific prior written permission.
pehrhovey	0:a548a085de55	15	*
pehrhovey	0:a548a085de55	16	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
pehrhovey	0:a548a085de55	17	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
pehrhovey	0:a548a085de55	18	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
pehrhovey	0:a548a085de55	19	* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
pehrhovey	0:a548a085de55	20	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
pehrhovey	0:a548a085de55	21	* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
pehrhovey	0:a548a085de55	22	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
pehrhovey	0:a548a085de55	23	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
pehrhovey	0:a548a085de55	24	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
pehrhovey	0:a548a085de55	25	* OF SUCH DAMAGE.
pehrhovey	0:a548a085de55	26	*
pehrhovey	0:a548a085de55	27	* This file is part of the lwIP TCP/IP stack.
pehrhovey	0:a548a085de55	28	*
pehrhovey	0:a548a085de55	29	* Author: Adam Dunkels <adam@sics.se>
pehrhovey	0:a548a085de55	30	*
pehrhovey	0:a548a085de55	31	*/
pehrhovey	0:a548a085de55	32
pehrhovey	0:a548a085de55	33	#ifndef __LWIP_PBUF_H__
pehrhovey	0:a548a085de55	34	#define __LWIP_PBUF_H__
pehrhovey	0:a548a085de55	35
pehrhovey	0:a548a085de55	36	#include "lwip/opt.h"
pehrhovey	0:a548a085de55	37	#include "lwip/err.h"
pehrhovey	0:a548a085de55	38
pehrhovey	0:a548a085de55	39	#ifdef __cplusplus
pehrhovey	0:a548a085de55	40	extern "C" {
pehrhovey	0:a548a085de55	41	#endif
pehrhovey	0:a548a085de55	42
pehrhovey	0:a548a085de55	43	#define PBUF_TRANSPORT_HLEN 20
pehrhovey	0:a548a085de55	44	#define PBUF_IP_HLEN 20
pehrhovey	0:a548a085de55	45
pehrhovey	0:a548a085de55	46	typedef enum {
pehrhovey	0:a548a085de55	47	PBUF_TRANSPORT,
pehrhovey	0:a548a085de55	48	PBUF_IP,
pehrhovey	0:a548a085de55	49	PBUF_LINK,
pehrhovey	0:a548a085de55	50	PBUF_RAW
pehrhovey	0:a548a085de55	51	} pbuf_layer;
pehrhovey	0:a548a085de55	52
pehrhovey	0:a548a085de55	53	typedef enum {
pehrhovey	0:a548a085de55	54	PBUF_RAM, /* pbuf data is stored in RAM */
pehrhovey	0:a548a085de55	55	PBUF_ROM, /* pbuf data is stored in ROM */
pehrhovey	0:a548a085de55	56	PBUF_REF, /* pbuf comes from the pbuf pool */
pehrhovey	0:a548a085de55	57	PBUF_POOL /* pbuf payload refers to RAM */
pehrhovey	0:a548a085de55	58	} pbuf_type;
pehrhovey	0:a548a085de55	59
pehrhovey	0:a548a085de55	60
pehrhovey	0:a548a085de55	61	/** indicates this packet's data should be immediately passed to the application */
pehrhovey	0:a548a085de55	62	#define PBUF_FLAG_PUSH 0x01U
pehrhovey	0:a548a085de55	63
pehrhovey	0:a548a085de55	64	struct pbuf {
pehrhovey	0:a548a085de55	65	/** next pbuf in singly linked pbuf chain */
pehrhovey	0:a548a085de55	66	struct pbuf *next;
pehrhovey	0:a548a085de55	67
pehrhovey	0:a548a085de55	68	/** pointer to the actual data in the buffer */
pehrhovey	0:a548a085de55	69	void *payload;
pehrhovey	0:a548a085de55	70
pehrhovey	0:a548a085de55	71	/**
pehrhovey	0:a548a085de55	72	* total length of this buffer and all next buffers in chain
pehrhovey	0:a548a085de55	73	* belonging to the same packet.
pehrhovey	0:a548a085de55	74	*
pehrhovey	0:a548a085de55	75	* For non-queue packet chains this is the invariant:
pehrhovey	0:a548a085de55	76	* p->tot_len == p->len + (p->next? p->next->tot_len: 0)
pehrhovey	0:a548a085de55	77	*/
pehrhovey	0:a548a085de55	78	u16_t tot_len;
pehrhovey	0:a548a085de55	79
pehrhovey	0:a548a085de55	80	/** length of this buffer */
pehrhovey	0:a548a085de55	81	u16_t len;
pehrhovey	0:a548a085de55	82
pehrhovey	0:a548a085de55	83	/** pbuf_type as u8_t instead of enum to save space */
pehrhovey	0:a548a085de55	84	u8_t /pbuf_type/ type;
pehrhovey	0:a548a085de55	85
pehrhovey	0:a548a085de55	86	/** misc flags */
pehrhovey	0:a548a085de55	87	u8_t flags;
pehrhovey	0:a548a085de55	88
pehrhovey	0:a548a085de55	89	/**
pehrhovey	0:a548a085de55	90	* the reference count always equals the number of pointers
pehrhovey	0:a548a085de55	91	* that refer to this pbuf. This can be pointers from an application,
pehrhovey	0:a548a085de55	92	* the stack itself, or pbuf->next pointers from a chain.
pehrhovey	0:a548a085de55	93	*/
pehrhovey	0:a548a085de55	94	u16_t ref;
pehrhovey	0:a548a085de55	95
pehrhovey	0:a548a085de55	96	};
pehrhovey	0:a548a085de55	97
pehrhovey	0:a548a085de55	98	/* Initializes the pbuf module. This call is empty for now, but may not be in future. */
pehrhovey	0:a548a085de55	99	#define pbuf_init()
pehrhovey	0:a548a085de55	100
pehrhovey	0:a548a085de55	101	struct pbuf *pbuf_alloc(pbuf_layer l, u16_t size, pbuf_type type);
pehrhovey	0:a548a085de55	102	void pbuf_realloc(struct pbuf *p, u16_t size);
pehrhovey	0:a548a085de55	103	u8_t pbuf_header(struct pbuf *p, s16_t header_size);
pehrhovey	0:a548a085de55	104	void pbuf_ref(struct pbuf *p);
pehrhovey	0:a548a085de55	105	void pbuf_ref_chain(struct pbuf *p);
pehrhovey	0:a548a085de55	106	u8_t pbuf_free(struct pbuf *p);
pehrhovey	0:a548a085de55	107	u8_t pbuf_clen(struct pbuf *p);
pehrhovey	0:a548a085de55	108	void pbuf_cat(struct pbuf head, struct pbuf tail);
pehrhovey	0:a548a085de55	109	void pbuf_chain(struct pbuf head, struct pbuf tail);
pehrhovey	0:a548a085de55	110	struct pbuf pbuf_dechain(struct pbuf p);
pehrhovey	0:a548a085de55	111	err_t pbuf_copy(struct pbuf p_to, struct pbuf p_from);
pehrhovey	0:a548a085de55	112	u16_t pbuf_copy_partial(struct pbuf p, void dataptr, u16_t len, u16_t offset);
pehrhovey	0:a548a085de55	113	err_t pbuf_take(struct pbuf buf, const void dataptr, u16_t len);
pehrhovey	0:a548a085de55	114	struct pbuf pbuf_coalesce(struct pbuf p, pbuf_layer layer);
pehrhovey	0:a548a085de55	115
pehrhovey	0:a548a085de55	116	#ifdef __cplusplus
pehrhovey	0:a548a085de55	117	}
pehrhovey	0:a548a085de55	118	#endif
pehrhovey	0:a548a085de55	119
pehrhovey	0:a548a085de55	120	#endif /* __LWIP_PBUF_H__ */

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	14 Mar 2010
Imports:	240
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	5

Core/lwIP/include/lwip/pbuf.h@0:a548a085de55, 2010-03-14 (annotated)

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