CK Sin / Mbed 2 deprecated Ethernetwebsocket

Ethernetwebsoc

Dependencies:   C12832_lcd LM75B WebSocketClient mbed-rtos mbed Socket lwip-eth lwip-sys lwip

EthernetInterface/lwip/netif/slipif.c@0:0ed2a7c7190c, 2013-05-31 (annotated)

Committer:
GordonSin
Date:
Fri May 31 04:09:54 2013 +0000
Revision:
0:0ed2a7c7190c
31/5/2013;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
GordonSin 0:0ed2a7c7190c 1 /**
GordonSin 0:0ed2a7c7190c 2 * @file
GordonSin 0:0ed2a7c7190c 3 * SLIP Interface
GordonSin 0:0ed2a7c7190c 4 *
GordonSin 0:0ed2a7c7190c 5 */
GordonSin 0:0ed2a7c7190c 6
GordonSin 0:0ed2a7c7190c 7 /*
GordonSin 0:0ed2a7c7190c 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
GordonSin 0:0ed2a7c7190c 9 * All rights reserved.
GordonSin 0:0ed2a7c7190c 10 *
GordonSin 0:0ed2a7c7190c 11 * Redistribution and use in source and binary forms, with or without
GordonSin 0:0ed2a7c7190c 12 * modification, are permitted provided that the following conditions
GordonSin 0:0ed2a7c7190c 13 * are met:
GordonSin 0:0ed2a7c7190c 14 * 1. Redistributions of source code must retain the above copyright
GordonSin 0:0ed2a7c7190c 15 * notice, this list of conditions and the following disclaimer.
GordonSin 0:0ed2a7c7190c 16 * 2. Redistributions in binary form must reproduce the above copyright
GordonSin 0:0ed2a7c7190c 17 * notice, this list of conditions and the following disclaimer in the
GordonSin 0:0ed2a7c7190c 18 * documentation and/or other materials provided with the distribution.
GordonSin 0:0ed2a7c7190c 19 * 3. Neither the name of the Institute nor the names of its contributors
GordonSin 0:0ed2a7c7190c 20 * may be used to endorse or promote products derived from this software
GordonSin 0:0ed2a7c7190c 21 * without specific prior written permission.
GordonSin 0:0ed2a7c7190c 22 *
GordonSin 0:0ed2a7c7190c 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
GordonSin 0:0ed2a7c7190c 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
GordonSin 0:0ed2a7c7190c 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
GordonSin 0:0ed2a7c7190c 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
GordonSin 0:0ed2a7c7190c 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
GordonSin 0:0ed2a7c7190c 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
GordonSin 0:0ed2a7c7190c 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
GordonSin 0:0ed2a7c7190c 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
GordonSin 0:0ed2a7c7190c 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
GordonSin 0:0ed2a7c7190c 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
GordonSin 0:0ed2a7c7190c 33 * SUCH DAMAGE.
GordonSin 0:0ed2a7c7190c 34 *
GordonSin 0:0ed2a7c7190c 35 * This file is built upon the file: src/arch/rtxc/netif/sioslip.c
GordonSin 0:0ed2a7c7190c 36 *
GordonSin 0:0ed2a7c7190c 37 * Author: Magnus Ivarsson <magnus.ivarsson(at)volvo.com>
GordonSin 0:0ed2a7c7190c 38 */
GordonSin 0:0ed2a7c7190c 39
GordonSin 0:0ed2a7c7190c 40 /*
GordonSin 0:0ed2a7c7190c 41 * This is an arch independent SLIP netif. The specific serial hooks must be
GordonSin 0:0ed2a7c7190c 42 * provided by another file. They are sio_open, sio_read/sio_tryread and sio_send
GordonSin 0:0ed2a7c7190c 43 */
GordonSin 0:0ed2a7c7190c 44
GordonSin 0:0ed2a7c7190c 45 #include "netif/slipif.h"
GordonSin 0:0ed2a7c7190c 46 #include "lwip/opt.h"
GordonSin 0:0ed2a7c7190c 47
GordonSin 0:0ed2a7c7190c 48 #if LWIP_HAVE_SLIPIF
GordonSin 0:0ed2a7c7190c 49
GordonSin 0:0ed2a7c7190c 50 #include "lwip/def.h"
GordonSin 0:0ed2a7c7190c 51 #include "lwip/pbuf.h"
GordonSin 0:0ed2a7c7190c 52 #include "lwip/sys.h"
GordonSin 0:0ed2a7c7190c 53 #include "lwip/stats.h"
GordonSin 0:0ed2a7c7190c 54 #include "lwip/snmp.h"
GordonSin 0:0ed2a7c7190c 55 #include "lwip/sio.h"
GordonSin 0:0ed2a7c7190c 56
GordonSin 0:0ed2a7c7190c 57 #define SLIP_BLOCK 1
GordonSin 0:0ed2a7c7190c 58 #define SLIP_DONTBLOCK 0
GordonSin 0:0ed2a7c7190c 59
GordonSin 0:0ed2a7c7190c 60 #define SLIP_END 0300 /* 0xC0 */
GordonSin 0:0ed2a7c7190c 61 #define SLIP_ESC 0333 /* 0xDB */
GordonSin 0:0ed2a7c7190c 62 #define SLIP_ESC_END 0334 /* 0xDC */
GordonSin 0:0ed2a7c7190c 63 #define SLIP_ESC_ESC 0335 /* 0xDD */
GordonSin 0:0ed2a7c7190c 64
GordonSin 0:0ed2a7c7190c 65 #define SLIP_MAX_SIZE 1500
GordonSin 0:0ed2a7c7190c 66
GordonSin 0:0ed2a7c7190c 67 enum slipif_recv_state {
GordonSin 0:0ed2a7c7190c 68 SLIP_RECV_NORMAL,
GordonSin 0:0ed2a7c7190c 69 SLIP_RECV_ESCAPE,
GordonSin 0:0ed2a7c7190c 70 };
GordonSin 0:0ed2a7c7190c 71
GordonSin 0:0ed2a7c7190c 72 struct slipif_priv {
GordonSin 0:0ed2a7c7190c 73 sio_fd_t sd;
GordonSin 0:0ed2a7c7190c 74 /* q is the whole pbuf chain for a packet, p is the current pbuf in the chain */
GordonSin 0:0ed2a7c7190c 75 struct pbuf *p, *q;
GordonSin 0:0ed2a7c7190c 76 enum slipif_recv_state state;
GordonSin 0:0ed2a7c7190c 77 u16_t i, recved;
GordonSin 0:0ed2a7c7190c 78 };
GordonSin 0:0ed2a7c7190c 79
GordonSin 0:0ed2a7c7190c 80 /**
GordonSin 0:0ed2a7c7190c 81 * Send a pbuf doing the necessary SLIP encapsulation
GordonSin 0:0ed2a7c7190c 82 *
GordonSin 0:0ed2a7c7190c 83 * Uses the serial layer's sio_send()
GordonSin 0:0ed2a7c7190c 84 *
GordonSin 0:0ed2a7c7190c 85 * @param netif the lwip network interface structure for this slipif
GordonSin 0:0ed2a7c7190c 86 * @param p the pbuf chaing packet to send
GordonSin 0:0ed2a7c7190c 87 * @param ipaddr the ip address to send the packet to (not used for slipif)
GordonSin 0:0ed2a7c7190c 88 * @return always returns ERR_OK since the serial layer does not provide return values
GordonSin 0:0ed2a7c7190c 89 */
GordonSin 0:0ed2a7c7190c 90 err_t
GordonSin 0:0ed2a7c7190c 91 slipif_output(struct netif *netif, struct pbuf *p, ip_addr_t *ipaddr)
GordonSin 0:0ed2a7c7190c 92 {
GordonSin 0:0ed2a7c7190c 93 struct slipif_priv *priv;
GordonSin 0:0ed2a7c7190c 94 struct pbuf *q;
GordonSin 0:0ed2a7c7190c 95 u16_t i;
GordonSin 0:0ed2a7c7190c 96 u8_t c;
GordonSin 0:0ed2a7c7190c 97
GordonSin 0:0ed2a7c7190c 98 LWIP_ASSERT("netif != NULL", (netif != NULL));
GordonSin 0:0ed2a7c7190c 99 LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
GordonSin 0:0ed2a7c7190c 100 LWIP_ASSERT("p != NULL", (p != NULL));
GordonSin 0:0ed2a7c7190c 101
GordonSin 0:0ed2a7c7190c 102 LWIP_UNUSED_ARG(ipaddr);
GordonSin 0:0ed2a7c7190c 103
GordonSin 0:0ed2a7c7190c 104 priv = netif->state;
GordonSin 0:0ed2a7c7190c 105
GordonSin 0:0ed2a7c7190c 106 /* Send pbuf out on the serial I/O device. */
GordonSin 0:0ed2a7c7190c 107 sio_send(SLIP_END, priv->sd);
GordonSin 0:0ed2a7c7190c 108
GordonSin 0:0ed2a7c7190c 109 for (q = p; q != NULL; q = q->next) {
GordonSin 0:0ed2a7c7190c 110 for (i = 0; i < q->len; i++) {
GordonSin 0:0ed2a7c7190c 111 c = ((u8_t *)q->payload)[i];
GordonSin 0:0ed2a7c7190c 112 switch (c) {
GordonSin 0:0ed2a7c7190c 113 case SLIP_END:
GordonSin 0:0ed2a7c7190c 114 sio_send(SLIP_ESC, priv->sd);
GordonSin 0:0ed2a7c7190c 115 sio_send(SLIP_ESC_END, priv->sd);
GordonSin 0:0ed2a7c7190c 116 break;
GordonSin 0:0ed2a7c7190c 117 case SLIP_ESC:
GordonSin 0:0ed2a7c7190c 118 sio_send(SLIP_ESC, priv->sd);
GordonSin 0:0ed2a7c7190c 119 sio_send(SLIP_ESC_ESC, priv->sd);
GordonSin 0:0ed2a7c7190c 120 break;
GordonSin 0:0ed2a7c7190c 121 default:
GordonSin 0:0ed2a7c7190c 122 sio_send(c, priv->sd);
GordonSin 0:0ed2a7c7190c 123 break;
GordonSin 0:0ed2a7c7190c 124 }
GordonSin 0:0ed2a7c7190c 125 }
GordonSin 0:0ed2a7c7190c 126 }
GordonSin 0:0ed2a7c7190c 127 sio_send(SLIP_END, priv->sd);
GordonSin 0:0ed2a7c7190c 128 return ERR_OK;
GordonSin 0:0ed2a7c7190c 129 }
GordonSin 0:0ed2a7c7190c 130
GordonSin 0:0ed2a7c7190c 131 /**
GordonSin 0:0ed2a7c7190c 132 * Static function for easy use of blockig or non-blocking
GordonSin 0:0ed2a7c7190c 133 * sio_read
GordonSin 0:0ed2a7c7190c 134 *
GordonSin 0:0ed2a7c7190c 135 * @param fd serial device handle
GordonSin 0:0ed2a7c7190c 136 * @param data pointer to data buffer for receiving
GordonSin 0:0ed2a7c7190c 137 * @param len maximum length (in bytes) of data to receive
GordonSin 0:0ed2a7c7190c 138 * @param block if 1, call sio_read; if 0, call sio_tryread
GordonSin 0:0ed2a7c7190c 139 * @return return value of sio_read of sio_tryread
GordonSin 0:0ed2a7c7190c 140 */
GordonSin 0:0ed2a7c7190c 141 static u32_t
GordonSin 0:0ed2a7c7190c 142 slip_sio_read(sio_fd_t fd, u8_t* data, u32_t len, u8_t block)
GordonSin 0:0ed2a7c7190c 143 {
GordonSin 0:0ed2a7c7190c 144 if (block) {
GordonSin 0:0ed2a7c7190c 145 return sio_read(fd, data, len);
GordonSin 0:0ed2a7c7190c 146 } else {
GordonSin 0:0ed2a7c7190c 147 return sio_tryread(fd, data, len);
GordonSin 0:0ed2a7c7190c 148 }
GordonSin 0:0ed2a7c7190c 149 }
GordonSin 0:0ed2a7c7190c 150
GordonSin 0:0ed2a7c7190c 151 /**
GordonSin 0:0ed2a7c7190c 152 * Handle the incoming SLIP stream character by character
GordonSin 0:0ed2a7c7190c 153 *
GordonSin 0:0ed2a7c7190c 154 * Poll the serial layer by calling sio_read() or sio_tryread().
GordonSin 0:0ed2a7c7190c 155 *
GordonSin 0:0ed2a7c7190c 156 * @param netif the lwip network interface structure for this slipif
GordonSin 0:0ed2a7c7190c 157 * @param block if 1, block until data is received; if 0, return when all data
GordonSin 0:0ed2a7c7190c 158 * from the buffer is received (multiple calls to this function will
GordonSin 0:0ed2a7c7190c 159 * return a complete packet, NULL is returned before - used for polling)
GordonSin 0:0ed2a7c7190c 160 * @return The IP packet when SLIP_END is received
GordonSin 0:0ed2a7c7190c 161 */
GordonSin 0:0ed2a7c7190c 162 static struct pbuf *
GordonSin 0:0ed2a7c7190c 163 slipif_input(struct netif *netif, u8_t block)
GordonSin 0:0ed2a7c7190c 164 {
GordonSin 0:0ed2a7c7190c 165 struct slipif_priv *priv;
GordonSin 0:0ed2a7c7190c 166 u8_t c;
GordonSin 0:0ed2a7c7190c 167 struct pbuf *t;
GordonSin 0:0ed2a7c7190c 168
GordonSin 0:0ed2a7c7190c 169 LWIP_ASSERT("netif != NULL", (netif != NULL));
GordonSin 0:0ed2a7c7190c 170 LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
GordonSin 0:0ed2a7c7190c 171
GordonSin 0:0ed2a7c7190c 172 priv = netif->state;
GordonSin 0:0ed2a7c7190c 173
GordonSin 0:0ed2a7c7190c 174 while (slip_sio_read(priv->sd, &c, 1, block) > 0) {
GordonSin 0:0ed2a7c7190c 175 switch (priv->state) {
GordonSin 0:0ed2a7c7190c 176 case SLIP_RECV_NORMAL:
GordonSin 0:0ed2a7c7190c 177 switch (c) {
GordonSin 0:0ed2a7c7190c 178 case SLIP_END:
GordonSin 0:0ed2a7c7190c 179 if (priv->recved > 0) {
GordonSin 0:0ed2a7c7190c 180 /* Received whole packet. */
GordonSin 0:0ed2a7c7190c 181 /* Trim the pbuf to the size of the received packet. */
GordonSin 0:0ed2a7c7190c 182 pbuf_realloc(priv->q, priv->recved);
GordonSin 0:0ed2a7c7190c 183
GordonSin 0:0ed2a7c7190c 184 LINK_STATS_INC(link.recv);
GordonSin 0:0ed2a7c7190c 185
GordonSin 0:0ed2a7c7190c 186 LWIP_DEBUGF(SLIP_DEBUG, ("slipif: Got packet\n"));
GordonSin 0:0ed2a7c7190c 187 t = priv->q;
GordonSin 0:0ed2a7c7190c 188 priv->p = priv->q = NULL;
GordonSin 0:0ed2a7c7190c 189 priv->i = priv->recved = 0;
GordonSin 0:0ed2a7c7190c 190 return t;
GordonSin 0:0ed2a7c7190c 191 }
GordonSin 0:0ed2a7c7190c 192 continue;
GordonSin 0:0ed2a7c7190c 193 case SLIP_ESC:
GordonSin 0:0ed2a7c7190c 194 priv->state = SLIP_RECV_ESCAPE;
GordonSin 0:0ed2a7c7190c 195 continue;
GordonSin 0:0ed2a7c7190c 196 }
GordonSin 0:0ed2a7c7190c 197 break;
GordonSin 0:0ed2a7c7190c 198 case SLIP_RECV_ESCAPE:
GordonSin 0:0ed2a7c7190c 199 switch (c) {
GordonSin 0:0ed2a7c7190c 200 case SLIP_ESC_END:
GordonSin 0:0ed2a7c7190c 201 c = SLIP_END;
GordonSin 0:0ed2a7c7190c 202 break;
GordonSin 0:0ed2a7c7190c 203 case SLIP_ESC_ESC:
GordonSin 0:0ed2a7c7190c 204 c = SLIP_ESC;
GordonSin 0:0ed2a7c7190c 205 break;
GordonSin 0:0ed2a7c7190c 206 }
GordonSin 0:0ed2a7c7190c 207 priv->state = SLIP_RECV_NORMAL;
GordonSin 0:0ed2a7c7190c 208 /* FALLTHROUGH */
GordonSin 0:0ed2a7c7190c 209 }
GordonSin 0:0ed2a7c7190c 210
GordonSin 0:0ed2a7c7190c 211 /* byte received, packet not yet completely received */
GordonSin 0:0ed2a7c7190c 212 if (priv->p == NULL) {
GordonSin 0:0ed2a7c7190c 213 /* allocate a new pbuf */
GordonSin 0:0ed2a7c7190c 214 LWIP_DEBUGF(SLIP_DEBUG, ("slipif_input: alloc\n"));
GordonSin 0:0ed2a7c7190c 215 priv->p = pbuf_alloc(PBUF_LINK, (PBUF_POOL_BUFSIZE - PBUF_LINK_HLEN), PBUF_POOL);
GordonSin 0:0ed2a7c7190c 216
GordonSin 0:0ed2a7c7190c 217 if (priv->p == NULL) {
GordonSin 0:0ed2a7c7190c 218 LINK_STATS_INC(link.drop);
GordonSin 0:0ed2a7c7190c 219 LWIP_DEBUGF(SLIP_DEBUG, ("slipif_input: no new pbuf! (DROP)\n"));
GordonSin 0:0ed2a7c7190c 220 /* don't process any further since we got no pbuf to receive to */
GordonSin 0:0ed2a7c7190c 221 break;
GordonSin 0:0ed2a7c7190c 222 }
GordonSin 0:0ed2a7c7190c 223
GordonSin 0:0ed2a7c7190c 224 if (priv->q != NULL) {
GordonSin 0:0ed2a7c7190c 225 /* 'chain' the pbuf to the existing chain */
GordonSin 0:0ed2a7c7190c 226 pbuf_cat(priv->q, priv->p);
GordonSin 0:0ed2a7c7190c 227 } else {
GordonSin 0:0ed2a7c7190c 228 /* p is the first pbuf in the chain */
GordonSin 0:0ed2a7c7190c 229 priv->q = priv->p;
GordonSin 0:0ed2a7c7190c 230 }
GordonSin 0:0ed2a7c7190c 231 }
GordonSin 0:0ed2a7c7190c 232
GordonSin 0:0ed2a7c7190c 233 /* this automatically drops bytes if > SLIP_MAX_SIZE */
GordonSin 0:0ed2a7c7190c 234 if ((priv->p != NULL) && (priv->recved <= SLIP_MAX_SIZE)) {
GordonSin 0:0ed2a7c7190c 235 ((u8_t *)priv->p->payload)[priv->i] = c;
GordonSin 0:0ed2a7c7190c 236 priv->recved++;
GordonSin 0:0ed2a7c7190c 237 priv->i++;
GordonSin 0:0ed2a7c7190c 238 if (priv->i >= priv->p->len) {
GordonSin 0:0ed2a7c7190c 239 /* on to the next pbuf */
GordonSin 0:0ed2a7c7190c 240 priv->i = 0;
GordonSin 0:0ed2a7c7190c 241 if (priv->p->next != NULL && priv->p->next->len > 0) {
GordonSin 0:0ed2a7c7190c 242 /* p is a chain, on to the next in the chain */
GordonSin 0:0ed2a7c7190c 243 priv->p = priv->p->next;
GordonSin 0:0ed2a7c7190c 244 } else {
GordonSin 0:0ed2a7c7190c 245 /* p is a single pbuf, set it to NULL so next time a new
GordonSin 0:0ed2a7c7190c 246 * pbuf is allocated */
GordonSin 0:0ed2a7c7190c 247 priv->p = NULL;
GordonSin 0:0ed2a7c7190c 248 }
GordonSin 0:0ed2a7c7190c 249 }
GordonSin 0:0ed2a7c7190c 250 }
GordonSin 0:0ed2a7c7190c 251 }
GordonSin 0:0ed2a7c7190c 252
GordonSin 0:0ed2a7c7190c 253 return NULL;
GordonSin 0:0ed2a7c7190c 254 }
GordonSin 0:0ed2a7c7190c 255
GordonSin 0:0ed2a7c7190c 256 #if !NO_SYS
GordonSin 0:0ed2a7c7190c 257 /**
GordonSin 0:0ed2a7c7190c 258 * The SLIP input thread.
GordonSin 0:0ed2a7c7190c 259 *
GordonSin 0:0ed2a7c7190c 260 * Feed the IP layer with incoming packets
GordonSin 0:0ed2a7c7190c 261 *
GordonSin 0:0ed2a7c7190c 262 * @param nf the lwip network interface structure for this slipif
GordonSin 0:0ed2a7c7190c 263 */
GordonSin 0:0ed2a7c7190c 264 static void
GordonSin 0:0ed2a7c7190c 265 slipif_loop_thread(void *nf)
GordonSin 0:0ed2a7c7190c 266 {
GordonSin 0:0ed2a7c7190c 267 struct pbuf *p;
GordonSin 0:0ed2a7c7190c 268 struct netif *netif = (struct netif *)nf;
GordonSin 0:0ed2a7c7190c 269
GordonSin 0:0ed2a7c7190c 270 while (1) {
GordonSin 0:0ed2a7c7190c 271 p = slipif_input(netif, SLIP_BLOCK);
GordonSin 0:0ed2a7c7190c 272 if (p != NULL) {
GordonSin 0:0ed2a7c7190c 273 if (netif->input(p, netif) != ERR_OK) {
GordonSin 0:0ed2a7c7190c 274 pbuf_free(p);
GordonSin 0:0ed2a7c7190c 275 p = NULL;
GordonSin 0:0ed2a7c7190c 276 }
GordonSin 0:0ed2a7c7190c 277 }
GordonSin 0:0ed2a7c7190c 278 }
GordonSin 0:0ed2a7c7190c 279 }
GordonSin 0:0ed2a7c7190c 280 #endif /* !NO_SYS */
GordonSin 0:0ed2a7c7190c 281
GordonSin 0:0ed2a7c7190c 282 /**
GordonSin 0:0ed2a7c7190c 283 * SLIP netif initialization
GordonSin 0:0ed2a7c7190c 284 *
GordonSin 0:0ed2a7c7190c 285 * Call the arch specific sio_open and remember
GordonSin 0:0ed2a7c7190c 286 * the opened device in the state field of the netif.
GordonSin 0:0ed2a7c7190c 287 *
GordonSin 0:0ed2a7c7190c 288 * @param netif the lwip network interface structure for this slipif
GordonSin 0:0ed2a7c7190c 289 * @return ERR_OK if serial line could be opened,
GordonSin 0:0ed2a7c7190c 290 * ERR_MEM if no memory could be allocated,
GordonSin 0:0ed2a7c7190c 291 * ERR_IF is serial line couldn't be opened
GordonSin 0:0ed2a7c7190c 292 *
GordonSin 0:0ed2a7c7190c 293 * @note netif->num must contain the number of the serial port to open
GordonSin 0:0ed2a7c7190c 294 * (0 by default)
GordonSin 0:0ed2a7c7190c 295 */
GordonSin 0:0ed2a7c7190c 296 err_t
GordonSin 0:0ed2a7c7190c 297 slipif_init(struct netif *netif)
GordonSin 0:0ed2a7c7190c 298 {
GordonSin 0:0ed2a7c7190c 299 struct slipif_priv *priv;
GordonSin 0:0ed2a7c7190c 300
GordonSin 0:0ed2a7c7190c 301 LWIP_DEBUGF(SLIP_DEBUG, ("slipif_init: netif->num=%"U16_F"\n", (u16_t)netif->num));
GordonSin 0:0ed2a7c7190c 302
GordonSin 0:0ed2a7c7190c 303 /* Allocate private data */
GordonSin 0:0ed2a7c7190c 304 priv = mem_malloc(sizeof(struct slipif_priv));
GordonSin 0:0ed2a7c7190c 305 if (!priv) {
GordonSin 0:0ed2a7c7190c 306 return ERR_MEM;
GordonSin 0:0ed2a7c7190c 307 }
GordonSin 0:0ed2a7c7190c 308
GordonSin 0:0ed2a7c7190c 309 netif->name[0] = 's';
GordonSin 0:0ed2a7c7190c 310 netif->name[1] = 'l';
GordonSin 0:0ed2a7c7190c 311 netif->output = slipif_output;
GordonSin 0:0ed2a7c7190c 312 netif->mtu = SLIP_MAX_SIZE;
GordonSin 0:0ed2a7c7190c 313 netif->flags |= NETIF_FLAG_POINTTOPOINT;
GordonSin 0:0ed2a7c7190c 314
GordonSin 0:0ed2a7c7190c 315 /* Try to open the serial port (netif->num contains the port number). */
GordonSin 0:0ed2a7c7190c 316 priv->sd = sio_open(netif->num);
GordonSin 0:0ed2a7c7190c 317 if (!priv->sd) {
GordonSin 0:0ed2a7c7190c 318 /* Opening the serial port failed. */
GordonSin 0:0ed2a7c7190c 319 mem_free(priv);
GordonSin 0:0ed2a7c7190c 320 return ERR_IF;
GordonSin 0:0ed2a7c7190c 321 }
GordonSin 0:0ed2a7c7190c 322
GordonSin 0:0ed2a7c7190c 323 /* Initialize private data */
GordonSin 0:0ed2a7c7190c 324 priv->p = NULL;
GordonSin 0:0ed2a7c7190c 325 priv->q = NULL;
GordonSin 0:0ed2a7c7190c 326 priv->state = SLIP_RECV_NORMAL;
GordonSin 0:0ed2a7c7190c 327 priv->i = 0;
GordonSin 0:0ed2a7c7190c 328 priv->recved = 0;
GordonSin 0:0ed2a7c7190c 329
GordonSin 0:0ed2a7c7190c 330 netif->state = priv;
GordonSin 0:0ed2a7c7190c 331
GordonSin 0:0ed2a7c7190c 332 /* initialize the snmp variables and counters inside the struct netif
GordonSin 0:0ed2a7c7190c 333 * ifSpeed: no assumption can be made without knowing more about the
GordonSin 0:0ed2a7c7190c 334 * serial line!
GordonSin 0:0ed2a7c7190c 335 */
GordonSin 0:0ed2a7c7190c 336 NETIF_INIT_SNMP(netif, snmp_ifType_slip, 0);
GordonSin 0:0ed2a7c7190c 337
GordonSin 0:0ed2a7c7190c 338 /* Create a thread to poll the serial line. */
GordonSin 0:0ed2a7c7190c 339 sys_thread_new(SLIPIF_THREAD_NAME, slipif_loop_thread, netif,
GordonSin 0:0ed2a7c7190c 340 SLIPIF_THREAD_STACKSIZE, SLIPIF_THREAD_PRIO);
GordonSin 0:0ed2a7c7190c 341 return ERR_OK;
GordonSin 0:0ed2a7c7190c 342 }
GordonSin 0:0ed2a7c7190c 343
GordonSin 0:0ed2a7c7190c 344 /**
GordonSin 0:0ed2a7c7190c 345 * Polls the serial device and feeds the IP layer with incoming packets.
GordonSin 0:0ed2a7c7190c 346 *
GordonSin 0:0ed2a7c7190c 347 * @param netif The lwip network interface structure for this slipif
GordonSin 0:0ed2a7c7190c 348 */
GordonSin 0:0ed2a7c7190c 349 void
GordonSin 0:0ed2a7c7190c 350 slipif_poll(struct netif *netif)
GordonSin 0:0ed2a7c7190c 351 {
GordonSin 0:0ed2a7c7190c 352 struct pbuf *p;
GordonSin 0:0ed2a7c7190c 353 struct slipif_priv *priv;
GordonSin 0:0ed2a7c7190c 354
GordonSin 0:0ed2a7c7190c 355 LWIP_ASSERT("netif != NULL", (netif != NULL));
GordonSin 0:0ed2a7c7190c 356 LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
GordonSin 0:0ed2a7c7190c 357
GordonSin 0:0ed2a7c7190c 358 priv = netif->state;
GordonSin 0:0ed2a7c7190c 359
GordonSin 0:0ed2a7c7190c 360 while ((p = slipif_input(netif, SLIP_DONTBLOCK)) != NULL) {
GordonSin 0:0ed2a7c7190c 361 if (netif->input(p, netif) != ERR_OK) {
GordonSin 0:0ed2a7c7190c 362 pbuf_free(p);
GordonSin 0:0ed2a7c7190c 363 }
GordonSin 0:0ed2a7c7190c 364 }
GordonSin 0:0ed2a7c7190c 365 }
GordonSin 0:0ed2a7c7190c 366
GordonSin 0:0ed2a7c7190c 367 #endif /* LWIP_HAVE_SLIPIF */