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/netif/slipif.c@0:a259777c45a3, 2010-08-14 (annotated)

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

Who changed what in which revision?

User	Revision	Line number	New contents of line
dirkx	0:a259777c45a3	1	/**
dirkx	0:a259777c45a3	2	* @file
dirkx	0:a259777c45a3	3	* SLIP Interface
dirkx	0:a259777c45a3	4	*
dirkx	0:a259777c45a3	5	*/
dirkx	0:a259777c45a3	6
dirkx	0:a259777c45a3	7	/*
dirkx	0:a259777c45a3	8	* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
dirkx	0:a259777c45a3	9	* All rights reserved.
dirkx	0:a259777c45a3	10	*
dirkx	0:a259777c45a3	11	* Redistribution and use in source and binary forms, with or without
dirkx	0:a259777c45a3	12	* modification, are permitted provided that the following conditions
dirkx	0:a259777c45a3	13	* are met:
dirkx	0:a259777c45a3	14	* 1. Redistributions of source code must retain the above copyright
dirkx	0:a259777c45a3	15	* notice, this list of conditions and the following disclaimer.
dirkx	0:a259777c45a3	16	* 2. Redistributions in binary form must reproduce the above copyright
dirkx	0:a259777c45a3	17	* notice, this list of conditions and the following disclaimer in the
dirkx	0:a259777c45a3	18	* documentation and/or other materials provided with the distribution.
dirkx	0:a259777c45a3	19	* 3. Neither the name of the Institute nor the names of its contributors
dirkx	0:a259777c45a3	20	* may be used to endorse or promote products derived from this software
dirkx	0:a259777c45a3	21	* without specific prior written permission.
dirkx	0:a259777c45a3	22	*
dirkx	0:a259777c45a3	23	* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
dirkx	0:a259777c45a3	24	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
dirkx	0:a259777c45a3	25	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
dirkx	0:a259777c45a3	26	* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
dirkx	0:a259777c45a3	27	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
dirkx	0:a259777c45a3	28	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
dirkx	0:a259777c45a3	29	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
dirkx	0:a259777c45a3	30	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
dirkx	0:a259777c45a3	31	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
dirkx	0:a259777c45a3	32	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
dirkx	0:a259777c45a3	33	* SUCH DAMAGE.
dirkx	0:a259777c45a3	34	*
dirkx	0:a259777c45a3	35	* This file is built upon the file: src/arch/rtxc/netif/sioslip.c
dirkx	0:a259777c45a3	36	*
dirkx	0:a259777c45a3	37	* Author: Magnus Ivarsson <magnus.ivarsson(at)volvo.com>
dirkx	0:a259777c45a3	38	*/
dirkx	0:a259777c45a3	39
dirkx	0:a259777c45a3	40	/*
dirkx	0:a259777c45a3	41	* This is an arch independent SLIP netif. The specific serial hooks must be
dirkx	0:a259777c45a3	42	* provided by another file. They are sio_open, sio_read/sio_tryread and sio_send
dirkx	0:a259777c45a3	43	*/
dirkx	0:a259777c45a3	44
dirkx	0:a259777c45a3	45	#include "netif/slipif.h"
dirkx	0:a259777c45a3	46	#include "lwip/opt.h"
dirkx	0:a259777c45a3	47
dirkx	0:a259777c45a3	48	#if LWIP_HAVE_SLIPIF
dirkx	0:a259777c45a3	49
dirkx	0:a259777c45a3	50	#include "lwip/def.h"
dirkx	0:a259777c45a3	51	#include "lwip/pbuf.h"
dirkx	0:a259777c45a3	52	#include "lwip/sys.h"
dirkx	0:a259777c45a3	53	#include "lwip/stats.h"
dirkx	0:a259777c45a3	54	#include "lwip/snmp.h"
dirkx	0:a259777c45a3	55	#include "lwip/sio.h"
dirkx	0:a259777c45a3	56
dirkx	0:a259777c45a3	57	#define SLIP_BLOCK 1
dirkx	0:a259777c45a3	58	#define SLIP_DONTBLOCK 0
dirkx	0:a259777c45a3	59
dirkx	0:a259777c45a3	60	#define SLIP_END 0300 /* 0xC0 */
dirkx	0:a259777c45a3	61	#define SLIP_ESC 0333 /* 0xDB */
dirkx	0:a259777c45a3	62	#define SLIP_ESC_END 0334 /* 0xDC */
dirkx	0:a259777c45a3	63	#define SLIP_ESC_ESC 0335 /* 0xDD */
dirkx	0:a259777c45a3	64
dirkx	0:a259777c45a3	65	#define SLIP_MAX_SIZE 1500
dirkx	0:a259777c45a3	66
dirkx	0:a259777c45a3	67	enum slipif_recv_state {
dirkx	0:a259777c45a3	68	SLIP_RECV_NORMAL,
dirkx	0:a259777c45a3	69	SLIP_RECV_ESCAPE,
dirkx	0:a259777c45a3	70	};
dirkx	0:a259777c45a3	71
dirkx	0:a259777c45a3	72	struct slipif_priv {
dirkx	0:a259777c45a3	73	sio_fd_t sd;
dirkx	0:a259777c45a3	74	/* q is the whole pbuf chain for a packet, p is the current pbuf in the chain */
dirkx	0:a259777c45a3	75	struct pbuf p, q;
dirkx	0:a259777c45a3	76	enum slipif_recv_state state;
dirkx	0:a259777c45a3	77	u16_t i, recved;
dirkx	0:a259777c45a3	78	};
dirkx	0:a259777c45a3	79
dirkx	0:a259777c45a3	80	/**
dirkx	0:a259777c45a3	81	* Send a pbuf doing the necessary SLIP encapsulation
dirkx	0:a259777c45a3	82	*
dirkx	0:a259777c45a3	83	* Uses the serial layer's sio_send()
dirkx	0:a259777c45a3	84	*
dirkx	0:a259777c45a3	85	* @param netif the lwip network interface structure for this slipif
dirkx	0:a259777c45a3	86	* @param p the pbuf chaing packet to send
dirkx	0:a259777c45a3	87	* @param ipaddr the ip address to send the packet to (not used for slipif)
dirkx	0:a259777c45a3	88	* @return always returns ERR_OK since the serial layer does not provide return values
dirkx	0:a259777c45a3	89	*/
dirkx	0:a259777c45a3	90	err_t
dirkx	0:a259777c45a3	91	slipif_output(struct netif netif, struct pbuf p, ip_addr_t *ipaddr)
dirkx	0:a259777c45a3	92	{
dirkx	0:a259777c45a3	93	struct slipif_priv *priv;
dirkx	0:a259777c45a3	94	struct pbuf *q;
dirkx	0:a259777c45a3	95	u16_t i;
dirkx	0:a259777c45a3	96	u8_t c;
dirkx	0:a259777c45a3	97
dirkx	0:a259777c45a3	98	LWIP_ASSERT("netif != NULL", (netif != NULL));
dirkx	0:a259777c45a3	99	LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
dirkx	0:a259777c45a3	100	LWIP_ASSERT("p != NULL", (p != NULL));
dirkx	0:a259777c45a3	101
dirkx	0:a259777c45a3	102	LWIP_UNUSED_ARG(ipaddr);
dirkx	0:a259777c45a3	103
dirkx	0:a259777c45a3	104	priv = netif->state;
dirkx	0:a259777c45a3	105
dirkx	0:a259777c45a3	106	/* Send pbuf out on the serial I/O device. */
dirkx	0:a259777c45a3	107	sio_send(SLIP_END, priv->sd);
dirkx	0:a259777c45a3	108
dirkx	0:a259777c45a3	109	for (q = p; q != NULL; q = q->next) {
dirkx	0:a259777c45a3	110	for (i = 0; i < q->len; i++) {
dirkx	0:a259777c45a3	111	c = ((u8_t *)q->payload)[i];
dirkx	0:a259777c45a3	112	switch (c) {
dirkx	0:a259777c45a3	113	case SLIP_END:
dirkx	0:a259777c45a3	114	sio_send(SLIP_ESC, priv->sd);
dirkx	0:a259777c45a3	115	sio_send(SLIP_ESC_END, priv->sd);
dirkx	0:a259777c45a3	116	break;
dirkx	0:a259777c45a3	117	case SLIP_ESC:
dirkx	0:a259777c45a3	118	sio_send(SLIP_ESC, priv->sd);
dirkx	0:a259777c45a3	119	sio_send(SLIP_ESC_ESC, priv->sd);
dirkx	0:a259777c45a3	120	break;
dirkx	0:a259777c45a3	121	default:
dirkx	0:a259777c45a3	122	sio_send(c, priv->sd);
dirkx	0:a259777c45a3	123	break;
dirkx	0:a259777c45a3	124	}
dirkx	0:a259777c45a3	125	}
dirkx	0:a259777c45a3	126	}
dirkx	0:a259777c45a3	127	sio_send(SLIP_END, priv->sd);
dirkx	0:a259777c45a3	128	return ERR_OK;
dirkx	0:a259777c45a3	129	}
dirkx	0:a259777c45a3	130
dirkx	0:a259777c45a3	131	/**
dirkx	0:a259777c45a3	132	* Static function for easy use of blockig or non-blocking
dirkx	0:a259777c45a3	133	* sio_read
dirkx	0:a259777c45a3	134	*
dirkx	0:a259777c45a3	135	* @param fd serial device handle
dirkx	0:a259777c45a3	136	* @param data pointer to data buffer for receiving
dirkx	0:a259777c45a3	137	* @param len maximum length (in bytes) of data to receive
dirkx	0:a259777c45a3	138	* @param block if 1, call sio_read; if 0, call sio_tryread
dirkx	0:a259777c45a3	139	* @return return value of sio_read of sio_tryread
dirkx	0:a259777c45a3	140	*/
dirkx	0:a259777c45a3	141	static u32_t
dirkx	0:a259777c45a3	142	slip_sio_read(sio_fd_t fd, u8_t* data, u32_t len, u8_t block)
dirkx	0:a259777c45a3	143	{
dirkx	0:a259777c45a3	144	if (block) {
dirkx	0:a259777c45a3	145	return sio_read(fd, data, len);
dirkx	0:a259777c45a3	146	} else {
dirkx	0:a259777c45a3	147	return sio_tryread(fd, data, len);
dirkx	0:a259777c45a3	148	}
dirkx	0:a259777c45a3	149	}
dirkx	0:a259777c45a3	150
dirkx	0:a259777c45a3	151	/**
dirkx	0:a259777c45a3	152	* Handle the incoming SLIP stream character by character
dirkx	0:a259777c45a3	153	*
dirkx	0:a259777c45a3	154	* Poll the serial layer by calling sio_read() or sio_tryread().
dirkx	0:a259777c45a3	155	*
dirkx	0:a259777c45a3	156	* @param netif the lwip network interface structure for this slipif
dirkx	0:a259777c45a3	157	* @param block if 1, block until data is received; if 0, return when all data
dirkx	0:a259777c45a3	158	* from the buffer is received (multiple calls to this function will
dirkx	0:a259777c45a3	159	* return a complete packet, NULL is returned before - used for polling)
dirkx	0:a259777c45a3	160	* @return The IP packet when SLIP_END is received
dirkx	0:a259777c45a3	161	*/
dirkx	0:a259777c45a3	162	static struct pbuf *
dirkx	0:a259777c45a3	163	slipif_input(struct netif *netif, u8_t block)
dirkx	0:a259777c45a3	164	{
dirkx	0:a259777c45a3	165	struct slipif_priv *priv;
dirkx	0:a259777c45a3	166	u8_t c;
dirkx	0:a259777c45a3	167	struct pbuf *t;
dirkx	0:a259777c45a3	168
dirkx	0:a259777c45a3	169	LWIP_ASSERT("netif != NULL", (netif != NULL));
dirkx	0:a259777c45a3	170	LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
dirkx	0:a259777c45a3	171
dirkx	0:a259777c45a3	172	priv = netif->state;
dirkx	0:a259777c45a3	173
dirkx	0:a259777c45a3	174	while (slip_sio_read(priv->sd, &c, 1, block) > 0) {
dirkx	0:a259777c45a3	175	switch (priv->state) {
dirkx	0:a259777c45a3	176	case SLIP_RECV_NORMAL:
dirkx	0:a259777c45a3	177	switch (c) {
dirkx	0:a259777c45a3	178	case SLIP_END:
dirkx	0:a259777c45a3	179	if (priv->recved > 0) {
dirkx	0:a259777c45a3	180	/* Received whole packet. */
dirkx	0:a259777c45a3	181	/* Trim the pbuf to the size of the received packet. */
dirkx	0:a259777c45a3	182	pbuf_realloc(priv->q, priv->recved);
dirkx	0:a259777c45a3	183
dirkx	0:a259777c45a3	184	LINK_STATS_INC(link.recv);
dirkx	0:a259777c45a3	185
dirkx	0:a259777c45a3	186	LWIP_DEBUGF(SLIP_DEBUG, ("slipif: Got packet\n"));
dirkx	0:a259777c45a3	187	t = priv->q;
dirkx	0:a259777c45a3	188	priv->p = priv->q = NULL;
dirkx	0:a259777c45a3	189	priv->i = priv->recved = 0;
dirkx	0:a259777c45a3	190	return t;
dirkx	0:a259777c45a3	191	}
dirkx	0:a259777c45a3	192	continue;
dirkx	0:a259777c45a3	193	case SLIP_ESC:
dirkx	0:a259777c45a3	194	priv->state = SLIP_RECV_ESCAPE;
dirkx	0:a259777c45a3	195	continue;
dirkx	0:a259777c45a3	196	}
dirkx	0:a259777c45a3	197	break;
dirkx	0:a259777c45a3	198	case SLIP_RECV_ESCAPE:
dirkx	0:a259777c45a3	199	switch (c) {
dirkx	0:a259777c45a3	200	case SLIP_ESC_END:
dirkx	0:a259777c45a3	201	c = SLIP_END;
dirkx	0:a259777c45a3	202	break;
dirkx	0:a259777c45a3	203	case SLIP_ESC_ESC:
dirkx	0:a259777c45a3	204	c = SLIP_ESC;
dirkx	0:a259777c45a3	205	break;
dirkx	0:a259777c45a3	206	}
dirkx	0:a259777c45a3	207	priv->state = SLIP_RECV_NORMAL;
dirkx	0:a259777c45a3	208	/* FALLTHROUGH */
dirkx	0:a259777c45a3	209	}
dirkx	0:a259777c45a3	210
dirkx	0:a259777c45a3	211	/* byte received, packet not yet completely received */
dirkx	0:a259777c45a3	212	if (priv->p == NULL) {
dirkx	0:a259777c45a3	213	/* allocate a new pbuf */
dirkx	0:a259777c45a3	214	LWIP_DEBUGF(SLIP_DEBUG, ("slipif_input: alloc\n"));
dirkx	0:a259777c45a3	215	priv->p = pbuf_alloc(PBUF_LINK, (PBUF_POOL_BUFSIZE - PBUF_LINK_HLEN), PBUF_POOL);
dirkx	0:a259777c45a3	216
dirkx	0:a259777c45a3	217	if (priv->p == NULL) {
dirkx	0:a259777c45a3	218	LINK_STATS_INC(link.drop);
dirkx	0:a259777c45a3	219	LWIP_DEBUGF(SLIP_DEBUG, ("slipif_input: no new pbuf! (DROP)\n"));
dirkx	0:a259777c45a3	220	/* don't process any further since we got no pbuf to receive to */
dirkx	0:a259777c45a3	221	break;
dirkx	0:a259777c45a3	222	}
dirkx	0:a259777c45a3	223
dirkx	0:a259777c45a3	224	if (priv->q != NULL) {
dirkx	0:a259777c45a3	225	/* 'chain' the pbuf to the existing chain */
dirkx	0:a259777c45a3	226	pbuf_cat(priv->q, priv->p);
dirkx	0:a259777c45a3	227	} else {
dirkx	0:a259777c45a3	228	/* p is the first pbuf in the chain */
dirkx	0:a259777c45a3	229	priv->q = priv->p;
dirkx	0:a259777c45a3	230	}
dirkx	0:a259777c45a3	231	}
dirkx	0:a259777c45a3	232
dirkx	0:a259777c45a3	233	/* this automatically drops bytes if > SLIP_MAX_SIZE */
dirkx	0:a259777c45a3	234	if ((priv->p != NULL) && (priv->recved <= SLIP_MAX_SIZE)) {
dirkx	0:a259777c45a3	235	((u8_t *)priv->p->payload)[priv->i] = c;
dirkx	0:a259777c45a3	236	priv->recved++;
dirkx	0:a259777c45a3	237	priv->i++;
dirkx	0:a259777c45a3	238	if (priv->i >= priv->p->len) {
dirkx	0:a259777c45a3	239	/* on to the next pbuf */
dirkx	0:a259777c45a3	240	priv->i = 0;
dirkx	0:a259777c45a3	241	if (priv->p->next != NULL && priv->p->next->len > 0) {
dirkx	0:a259777c45a3	242	/* p is a chain, on to the next in the chain */
dirkx	0:a259777c45a3	243	priv->p = priv->p->next;
dirkx	0:a259777c45a3	244	} else {
dirkx	0:a259777c45a3	245	/* p is a single pbuf, set it to NULL so next time a new
dirkx	0:a259777c45a3	246	* pbuf is allocated */
dirkx	0:a259777c45a3	247	priv->p = NULL;
dirkx	0:a259777c45a3	248	}
dirkx	0:a259777c45a3	249	}
dirkx	0:a259777c45a3	250	}
dirkx	0:a259777c45a3	251	}
dirkx	0:a259777c45a3	252
dirkx	0:a259777c45a3	253	return NULL;
dirkx	0:a259777c45a3	254	}
dirkx	0:a259777c45a3	255
dirkx	0:a259777c45a3	256	#if !NO_SYS
dirkx	0:a259777c45a3	257	/**
dirkx	0:a259777c45a3	258	* The SLIP input thread.
dirkx	0:a259777c45a3	259	*
dirkx	0:a259777c45a3	260	* Feed the IP layer with incoming packets
dirkx	0:a259777c45a3	261	*
dirkx	0:a259777c45a3	262	* @param nf the lwip network interface structure for this slipif
dirkx	0:a259777c45a3	263	*/
dirkx	0:a259777c45a3	264	static void
dirkx	0:a259777c45a3	265	slipif_loop_thread(void *nf)
dirkx	0:a259777c45a3	266	{
dirkx	0:a259777c45a3	267	struct pbuf *p;
dirkx	0:a259777c45a3	268	struct netif netif = (struct netif )nf;
dirkx	0:a259777c45a3	269
dirkx	0:a259777c45a3	270	while (1) {
dirkx	0:a259777c45a3	271	p = slipif_input(netif, SLIP_BLOCK);
dirkx	0:a259777c45a3	272	if (p != NULL) {
dirkx	0:a259777c45a3	273	if (netif->input(p, netif) != ERR_OK) {
dirkx	0:a259777c45a3	274	pbuf_free(p);
dirkx	0:a259777c45a3	275	p = NULL;
dirkx	0:a259777c45a3	276	}
dirkx	0:a259777c45a3	277	}
dirkx	0:a259777c45a3	278	}
dirkx	0:a259777c45a3	279	}
dirkx	0:a259777c45a3	280	#endif /* !NO_SYS */
dirkx	0:a259777c45a3	281
dirkx	0:a259777c45a3	282	/**
dirkx	0:a259777c45a3	283	* SLIP netif initialization
dirkx	0:a259777c45a3	284	*
dirkx	0:a259777c45a3	285	* Call the arch specific sio_open and remember
dirkx	0:a259777c45a3	286	* the opened device in the state field of the netif.
dirkx	0:a259777c45a3	287	*
dirkx	0:a259777c45a3	288	* @param netif the lwip network interface structure for this slipif
dirkx	0:a259777c45a3	289	* @return ERR_OK if serial line could be opened,
dirkx	0:a259777c45a3	290	* ERR_MEM if no memory could be allocated,
dirkx	0:a259777c45a3	291	* ERR_IF is serial line couldn't be opened
dirkx	0:a259777c45a3	292	*
dirkx	0:a259777c45a3	293	* @note netif->num must contain the number of the serial port to open
dirkx	0:a259777c45a3	294	* (0 by default)
dirkx	0:a259777c45a3	295	*/
dirkx	0:a259777c45a3	296	err_t
dirkx	0:a259777c45a3	297	slipif_init(struct netif *netif)
dirkx	0:a259777c45a3	298	{
dirkx	0:a259777c45a3	299	struct slipif_priv *priv;
dirkx	0:a259777c45a3	300
dirkx	0:a259777c45a3	301	LWIP_DEBUGF(SLIP_DEBUG, ("slipif_init: netif->num=%"U16_F"\n", (u16_t)netif->num));
dirkx	0:a259777c45a3	302
dirkx	0:a259777c45a3	303	/* Allocate private data */
dirkx	0:a259777c45a3	304	priv = mem_malloc(sizeof(struct slipif_priv));
dirkx	0:a259777c45a3	305	if (!priv) {
dirkx	0:a259777c45a3	306	return ERR_MEM;
dirkx	0:a259777c45a3	307	}
dirkx	0:a259777c45a3	308
dirkx	0:a259777c45a3	309	netif->name[0] = 's';
dirkx	0:a259777c45a3	310	netif->name[1] = 'l';
dirkx	0:a259777c45a3	311	netif->output = slipif_output;
dirkx	0:a259777c45a3	312	netif->mtu = SLIP_MAX_SIZE;
dirkx	0:a259777c45a3	313	netif->flags \|= NETIF_FLAG_POINTTOPOINT;
dirkx	0:a259777c45a3	314
dirkx	0:a259777c45a3	315	/* Try to open the serial port (netif->num contains the port number). */
dirkx	0:a259777c45a3	316	priv->sd = sio_open(netif->num);
dirkx	0:a259777c45a3	317	if (!priv->sd) {
dirkx	0:a259777c45a3	318	/* Opening the serial port failed. */
dirkx	0:a259777c45a3	319	mem_free(priv);
dirkx	0:a259777c45a3	320	return ERR_IF;
dirkx	0:a259777c45a3	321	}
dirkx	0:a259777c45a3	322
dirkx	0:a259777c45a3	323	/* Initialize private data */
dirkx	0:a259777c45a3	324	priv->p = NULL;
dirkx	0:a259777c45a3	325	priv->q = NULL;
dirkx	0:a259777c45a3	326	priv->state = SLIP_RECV_NORMAL;
dirkx	0:a259777c45a3	327	priv->i = 0;
dirkx	0:a259777c45a3	328	priv->recved = 0;
dirkx	0:a259777c45a3	329
dirkx	0:a259777c45a3	330	netif->state = priv;
dirkx	0:a259777c45a3	331
dirkx	0:a259777c45a3	332	/* initialize the snmp variables and counters inside the struct netif
dirkx	0:a259777c45a3	333	* ifSpeed: no assumption can be made without knowing more about the
dirkx	0:a259777c45a3	334	* serial line!
dirkx	0:a259777c45a3	335	*/
dirkx	0:a259777c45a3	336	NETIF_INIT_SNMP(netif, snmp_ifType_slip, 0);
dirkx	0:a259777c45a3	337
dirkx	0:a259777c45a3	338	/* Create a thread to poll the serial line. */
dirkx	0:a259777c45a3	339	sys_thread_new(SLIPIF_THREAD_NAME, slipif_loop_thread, netif,
dirkx	0:a259777c45a3	340	SLIPIF_THREAD_STACKSIZE, SLIPIF_THREAD_PRIO);
dirkx	0:a259777c45a3	341	return ERR_OK;
dirkx	0:a259777c45a3	342	}
dirkx	0:a259777c45a3	343
dirkx	0:a259777c45a3	344	/**
dirkx	0:a259777c45a3	345	* Polls the serial device and feeds the IP layer with incoming packets.
dirkx	0:a259777c45a3	346	*
dirkx	0:a259777c45a3	347	* @param netif The lwip network interface structure for this slipif
dirkx	0:a259777c45a3	348	*/
dirkx	0:a259777c45a3	349	void
dirkx	0:a259777c45a3	350	slipif_poll(struct netif *netif)
dirkx	0:a259777c45a3	351	{
dirkx	0:a259777c45a3	352	struct pbuf *p;
dirkx	0:a259777c45a3	353	struct slipif_priv *priv;
dirkx	0:a259777c45a3	354
dirkx	0:a259777c45a3	355	LWIP_ASSERT("netif != NULL", (netif != NULL));
dirkx	0:a259777c45a3	356	LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
dirkx	0:a259777c45a3	357
dirkx	0:a259777c45a3	358	priv = netif->state;
dirkx	0:a259777c45a3	359
dirkx	0:a259777c45a3	360	while ((p = slipif_input(netif, SLIP_DONTBLOCK)) != NULL) {
dirkx	0:a259777c45a3	361	if (netif->input(p, netif) != ERR_OK) {
dirkx	0:a259777c45a3	362	pbuf_free(p);
dirkx	0:a259777c45a3	363	}
dirkx	0:a259777c45a3	364	}
dirkx	0:a259777c45a3	365	}
dirkx	0:a259777c45a3	366
dirkx	0:a259777c45a3	367	#endif /* LWIP_HAVE_SLIPIF */

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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/netif/slipif.c@0:a259777c45a3, 2010-08-14 (annotated)

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