Nino Der Kinderen / Mbed 2 deprecated InetTest

Embedded C project:18/12/2014

Dependencies:   DS1307 TextLCD mbed

NetServices/lwip/netif/slipif.c@0:8d87bc453349, 2014-12-18 (annotated)

Committer:
ninoderkinderen
Date:
Thu Dec 18 09:35:49 2014 +0000
Revision:
0:8d87bc453349
Programma embedded C

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ninoderkinderen 0:8d87bc453349 1 /**
ninoderkinderen 0:8d87bc453349 2 * @file
ninoderkinderen 0:8d87bc453349 3 * SLIP Interface
ninoderkinderen 0:8d87bc453349 4 *
ninoderkinderen 0:8d87bc453349 5 */
ninoderkinderen 0:8d87bc453349 6
ninoderkinderen 0:8d87bc453349 7 /*
ninoderkinderen 0:8d87bc453349 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
ninoderkinderen 0:8d87bc453349 9 * All rights reserved.
ninoderkinderen 0:8d87bc453349 10 *
ninoderkinderen 0:8d87bc453349 11 * Redistribution and use in source and binary forms, with or without
ninoderkinderen 0:8d87bc453349 12 * modification, are permitted provided that the following conditions
ninoderkinderen 0:8d87bc453349 13 * are met:
ninoderkinderen 0:8d87bc453349 14 * 1. Redistributions of source code must retain the above copyright
ninoderkinderen 0:8d87bc453349 15 * notice, this list of conditions and the following disclaimer.
ninoderkinderen 0:8d87bc453349 16 * 2. Redistributions in binary form must reproduce the above copyright
ninoderkinderen 0:8d87bc453349 17 * notice, this list of conditions and the following disclaimer in the
ninoderkinderen 0:8d87bc453349 18 * documentation and/or other materials provided with the distribution.
ninoderkinderen 0:8d87bc453349 19 * 3. Neither the name of the Institute nor the names of its contributors
ninoderkinderen 0:8d87bc453349 20 * may be used to endorse or promote products derived from this software
ninoderkinderen 0:8d87bc453349 21 * without specific prior written permission.
ninoderkinderen 0:8d87bc453349 22 *
ninoderkinderen 0:8d87bc453349 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
ninoderkinderen 0:8d87bc453349 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
ninoderkinderen 0:8d87bc453349 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ninoderkinderen 0:8d87bc453349 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
ninoderkinderen 0:8d87bc453349 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
ninoderkinderen 0:8d87bc453349 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
ninoderkinderen 0:8d87bc453349 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
ninoderkinderen 0:8d87bc453349 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
ninoderkinderen 0:8d87bc453349 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
ninoderkinderen 0:8d87bc453349 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
ninoderkinderen 0:8d87bc453349 33 * SUCH DAMAGE.
ninoderkinderen 0:8d87bc453349 34 *
ninoderkinderen 0:8d87bc453349 35 * This file is built upon the file: src/arch/rtxc/netif/sioslip.c
ninoderkinderen 0:8d87bc453349 36 *
ninoderkinderen 0:8d87bc453349 37 * Author: Magnus Ivarsson <magnus.ivarsson(at)volvo.com>
ninoderkinderen 0:8d87bc453349 38 */
ninoderkinderen 0:8d87bc453349 39
ninoderkinderen 0:8d87bc453349 40 /*
ninoderkinderen 0:8d87bc453349 41 * This is an arch independent SLIP netif. The specific serial hooks must be
ninoderkinderen 0:8d87bc453349 42 * provided by another file. They are sio_open, sio_read/sio_tryread and sio_send
ninoderkinderen 0:8d87bc453349 43 */
ninoderkinderen 0:8d87bc453349 44
ninoderkinderen 0:8d87bc453349 45 #include "netif/slipif.h"
ninoderkinderen 0:8d87bc453349 46 #include "lwip/opt.h"
ninoderkinderen 0:8d87bc453349 47
ninoderkinderen 0:8d87bc453349 48 #if LWIP_HAVE_SLIPIF
ninoderkinderen 0:8d87bc453349 49
ninoderkinderen 0:8d87bc453349 50 #include "lwip/def.h"
ninoderkinderen 0:8d87bc453349 51 #include "lwip/pbuf.h"
ninoderkinderen 0:8d87bc453349 52 #include "lwip/sys.h"
ninoderkinderen 0:8d87bc453349 53 #include "lwip/stats.h"
ninoderkinderen 0:8d87bc453349 54 #include "lwip/snmp.h"
ninoderkinderen 0:8d87bc453349 55 #include "lwip/sio.h"
ninoderkinderen 0:8d87bc453349 56
ninoderkinderen 0:8d87bc453349 57 #define SLIP_BLOCK 1
ninoderkinderen 0:8d87bc453349 58 #define SLIP_DONTBLOCK 0
ninoderkinderen 0:8d87bc453349 59
ninoderkinderen 0:8d87bc453349 60 #define SLIP_END 0300 /* 0xC0 */
ninoderkinderen 0:8d87bc453349 61 #define SLIP_ESC 0333 /* 0xDB */
ninoderkinderen 0:8d87bc453349 62 #define SLIP_ESC_END 0334 /* 0xDC */
ninoderkinderen 0:8d87bc453349 63 #define SLIP_ESC_ESC 0335 /* 0xDD */
ninoderkinderen 0:8d87bc453349 64
ninoderkinderen 0:8d87bc453349 65 #define SLIP_MAX_SIZE 1500
ninoderkinderen 0:8d87bc453349 66
ninoderkinderen 0:8d87bc453349 67 enum slipif_recv_state {
ninoderkinderen 0:8d87bc453349 68 SLIP_RECV_NORMAL,
ninoderkinderen 0:8d87bc453349 69 SLIP_RECV_ESCAPE,
ninoderkinderen 0:8d87bc453349 70 };
ninoderkinderen 0:8d87bc453349 71
ninoderkinderen 0:8d87bc453349 72 struct slipif_priv {
ninoderkinderen 0:8d87bc453349 73 sio_fd_t sd;
ninoderkinderen 0:8d87bc453349 74 /* q is the whole pbuf chain for a packet, p is the current pbuf in the chain */
ninoderkinderen 0:8d87bc453349 75 struct pbuf *p, *q;
ninoderkinderen 0:8d87bc453349 76 enum slipif_recv_state state;
ninoderkinderen 0:8d87bc453349 77 u16_t i, recved;
ninoderkinderen 0:8d87bc453349 78 };
ninoderkinderen 0:8d87bc453349 79
ninoderkinderen 0:8d87bc453349 80 /**
ninoderkinderen 0:8d87bc453349 81 * Send a pbuf doing the necessary SLIP encapsulation
ninoderkinderen 0:8d87bc453349 82 *
ninoderkinderen 0:8d87bc453349 83 * Uses the serial layer's sio_send()
ninoderkinderen 0:8d87bc453349 84 *
ninoderkinderen 0:8d87bc453349 85 * @param netif the lwip network interface structure for this slipif
ninoderkinderen 0:8d87bc453349 86 * @param p the pbuf chaing packet to send
ninoderkinderen 0:8d87bc453349 87 * @param ipaddr the ip address to send the packet to (not used for slipif)
ninoderkinderen 0:8d87bc453349 88 * @return always returns ERR_OK since the serial layer does not provide return values
ninoderkinderen 0:8d87bc453349 89 */
ninoderkinderen 0:8d87bc453349 90 err_t
ninoderkinderen 0:8d87bc453349 91 slipif_output(struct netif *netif, struct pbuf *p, ip_addr_t *ipaddr)
ninoderkinderen 0:8d87bc453349 92 {
ninoderkinderen 0:8d87bc453349 93 struct slipif_priv *priv;
ninoderkinderen 0:8d87bc453349 94 struct pbuf *q;
ninoderkinderen 0:8d87bc453349 95 u16_t i;
ninoderkinderen 0:8d87bc453349 96 u8_t c;
ninoderkinderen 0:8d87bc453349 97
ninoderkinderen 0:8d87bc453349 98 LWIP_ASSERT("netif != NULL", (netif != NULL));
ninoderkinderen 0:8d87bc453349 99 LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
ninoderkinderen 0:8d87bc453349 100 LWIP_ASSERT("p != NULL", (p != NULL));
ninoderkinderen 0:8d87bc453349 101
ninoderkinderen 0:8d87bc453349 102 LWIP_UNUSED_ARG(ipaddr);
ninoderkinderen 0:8d87bc453349 103
ninoderkinderen 0:8d87bc453349 104 priv = netif->state;
ninoderkinderen 0:8d87bc453349 105
ninoderkinderen 0:8d87bc453349 106 /* Send pbuf out on the serial I/O device. */
ninoderkinderen 0:8d87bc453349 107 sio_send(SLIP_END, priv->sd);
ninoderkinderen 0:8d87bc453349 108
ninoderkinderen 0:8d87bc453349 109 for (q = p; q != NULL; q = q->next) {
ninoderkinderen 0:8d87bc453349 110 for (i = 0; i < q->len; i++) {
ninoderkinderen 0:8d87bc453349 111 c = ((u8_t *)q->payload)[i];
ninoderkinderen 0:8d87bc453349 112 switch (c) {
ninoderkinderen 0:8d87bc453349 113 case SLIP_END:
ninoderkinderen 0:8d87bc453349 114 sio_send(SLIP_ESC, priv->sd);
ninoderkinderen 0:8d87bc453349 115 sio_send(SLIP_ESC_END, priv->sd);
ninoderkinderen 0:8d87bc453349 116 break;
ninoderkinderen 0:8d87bc453349 117 case SLIP_ESC:
ninoderkinderen 0:8d87bc453349 118 sio_send(SLIP_ESC, priv->sd);
ninoderkinderen 0:8d87bc453349 119 sio_send(SLIP_ESC_ESC, priv->sd);
ninoderkinderen 0:8d87bc453349 120 break;
ninoderkinderen 0:8d87bc453349 121 default:
ninoderkinderen 0:8d87bc453349 122 sio_send(c, priv->sd);
ninoderkinderen 0:8d87bc453349 123 break;
ninoderkinderen 0:8d87bc453349 124 }
ninoderkinderen 0:8d87bc453349 125 }
ninoderkinderen 0:8d87bc453349 126 }
ninoderkinderen 0:8d87bc453349 127 sio_send(SLIP_END, priv->sd);
ninoderkinderen 0:8d87bc453349 128 return ERR_OK;
ninoderkinderen 0:8d87bc453349 129 }
ninoderkinderen 0:8d87bc453349 130
ninoderkinderen 0:8d87bc453349 131 /**
ninoderkinderen 0:8d87bc453349 132 * Static function for easy use of blockig or non-blocking
ninoderkinderen 0:8d87bc453349 133 * sio_read
ninoderkinderen 0:8d87bc453349 134 *
ninoderkinderen 0:8d87bc453349 135 * @param fd serial device handle
ninoderkinderen 0:8d87bc453349 136 * @param data pointer to data buffer for receiving
ninoderkinderen 0:8d87bc453349 137 * @param len maximum length (in bytes) of data to receive
ninoderkinderen 0:8d87bc453349 138 * @param block if 1, call sio_read; if 0, call sio_tryread
ninoderkinderen 0:8d87bc453349 139 * @return return value of sio_read of sio_tryread
ninoderkinderen 0:8d87bc453349 140 */
ninoderkinderen 0:8d87bc453349 141 static u32_t
ninoderkinderen 0:8d87bc453349 142 slip_sio_read(sio_fd_t fd, u8_t* data, u32_t len, u8_t block)
ninoderkinderen 0:8d87bc453349 143 {
ninoderkinderen 0:8d87bc453349 144 if (block) {
ninoderkinderen 0:8d87bc453349 145 return sio_read(fd, data, len);
ninoderkinderen 0:8d87bc453349 146 } else {
ninoderkinderen 0:8d87bc453349 147 return sio_tryread(fd, data, len);
ninoderkinderen 0:8d87bc453349 148 }
ninoderkinderen 0:8d87bc453349 149 }
ninoderkinderen 0:8d87bc453349 150
ninoderkinderen 0:8d87bc453349 151 /**
ninoderkinderen 0:8d87bc453349 152 * Handle the incoming SLIP stream character by character
ninoderkinderen 0:8d87bc453349 153 *
ninoderkinderen 0:8d87bc453349 154 * Poll the serial layer by calling sio_read() or sio_tryread().
ninoderkinderen 0:8d87bc453349 155 *
ninoderkinderen 0:8d87bc453349 156 * @param netif the lwip network interface structure for this slipif
ninoderkinderen 0:8d87bc453349 157 * @param block if 1, block until data is received; if 0, return when all data
ninoderkinderen 0:8d87bc453349 158 * from the buffer is received (multiple calls to this function will
ninoderkinderen 0:8d87bc453349 159 * return a complete packet, NULL is returned before - used for polling)
ninoderkinderen 0:8d87bc453349 160 * @return The IP packet when SLIP_END is received
ninoderkinderen 0:8d87bc453349 161 */
ninoderkinderen 0:8d87bc453349 162 static struct pbuf *
ninoderkinderen 0:8d87bc453349 163 slipif_input(struct netif *netif, u8_t block)
ninoderkinderen 0:8d87bc453349 164 {
ninoderkinderen 0:8d87bc453349 165 struct slipif_priv *priv;
ninoderkinderen 0:8d87bc453349 166 u8_t c;
ninoderkinderen 0:8d87bc453349 167 struct pbuf *t;
ninoderkinderen 0:8d87bc453349 168
ninoderkinderen 0:8d87bc453349 169 LWIP_ASSERT("netif != NULL", (netif != NULL));
ninoderkinderen 0:8d87bc453349 170 LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
ninoderkinderen 0:8d87bc453349 171
ninoderkinderen 0:8d87bc453349 172 priv = netif->state;
ninoderkinderen 0:8d87bc453349 173
ninoderkinderen 0:8d87bc453349 174 while (slip_sio_read(priv->sd, &c, 1, block) > 0) {
ninoderkinderen 0:8d87bc453349 175 switch (priv->state) {
ninoderkinderen 0:8d87bc453349 176 case SLIP_RECV_NORMAL:
ninoderkinderen 0:8d87bc453349 177 switch (c) {
ninoderkinderen 0:8d87bc453349 178 case SLIP_END:
ninoderkinderen 0:8d87bc453349 179 if (priv->recved > 0) {
ninoderkinderen 0:8d87bc453349 180 /* Received whole packet. */
ninoderkinderen 0:8d87bc453349 181 /* Trim the pbuf to the size of the received packet. */
ninoderkinderen 0:8d87bc453349 182 pbuf_realloc(priv->q, priv->recved);
ninoderkinderen 0:8d87bc453349 183
ninoderkinderen 0:8d87bc453349 184 LINK_STATS_INC(link.recv);
ninoderkinderen 0:8d87bc453349 185
ninoderkinderen 0:8d87bc453349 186 LWIP_DEBUGF(SLIP_DEBUG, ("slipif: Got packet\n"));
ninoderkinderen 0:8d87bc453349 187 t = priv->q;
ninoderkinderen 0:8d87bc453349 188 priv->p = priv->q = NULL;
ninoderkinderen 0:8d87bc453349 189 priv->i = priv->recved = 0;
ninoderkinderen 0:8d87bc453349 190 return t;
ninoderkinderen 0:8d87bc453349 191 }
ninoderkinderen 0:8d87bc453349 192 continue;
ninoderkinderen 0:8d87bc453349 193 case SLIP_ESC:
ninoderkinderen 0:8d87bc453349 194 priv->state = SLIP_RECV_ESCAPE;
ninoderkinderen 0:8d87bc453349 195 continue;
ninoderkinderen 0:8d87bc453349 196 }
ninoderkinderen 0:8d87bc453349 197 break;
ninoderkinderen 0:8d87bc453349 198 case SLIP_RECV_ESCAPE:
ninoderkinderen 0:8d87bc453349 199 switch (c) {
ninoderkinderen 0:8d87bc453349 200 case SLIP_ESC_END:
ninoderkinderen 0:8d87bc453349 201 c = SLIP_END;
ninoderkinderen 0:8d87bc453349 202 break;
ninoderkinderen 0:8d87bc453349 203 case SLIP_ESC_ESC:
ninoderkinderen 0:8d87bc453349 204 c = SLIP_ESC;
ninoderkinderen 0:8d87bc453349 205 break;
ninoderkinderen 0:8d87bc453349 206 }
ninoderkinderen 0:8d87bc453349 207 priv->state = SLIP_RECV_NORMAL;
ninoderkinderen 0:8d87bc453349 208 /* FALLTHROUGH */
ninoderkinderen 0:8d87bc453349 209 }
ninoderkinderen 0:8d87bc453349 210
ninoderkinderen 0:8d87bc453349 211 /* byte received, packet not yet completely received */
ninoderkinderen 0:8d87bc453349 212 if (priv->p == NULL) {
ninoderkinderen 0:8d87bc453349 213 /* allocate a new pbuf */
ninoderkinderen 0:8d87bc453349 214 LWIP_DEBUGF(SLIP_DEBUG, ("slipif_input: alloc\n"));
ninoderkinderen 0:8d87bc453349 215 priv->p = pbuf_alloc(PBUF_LINK, (PBUF_POOL_BUFSIZE - PBUF_LINK_HLEN), PBUF_POOL);
ninoderkinderen 0:8d87bc453349 216
ninoderkinderen 0:8d87bc453349 217 if (priv->p == NULL) {
ninoderkinderen 0:8d87bc453349 218 LINK_STATS_INC(link.drop);
ninoderkinderen 0:8d87bc453349 219 LWIP_DEBUGF(SLIP_DEBUG, ("slipif_input: no new pbuf! (DROP)\n"));
ninoderkinderen 0:8d87bc453349 220 /* don't process any further since we got no pbuf to receive to */
ninoderkinderen 0:8d87bc453349 221 break;
ninoderkinderen 0:8d87bc453349 222 }
ninoderkinderen 0:8d87bc453349 223
ninoderkinderen 0:8d87bc453349 224 if (priv->q != NULL) {
ninoderkinderen 0:8d87bc453349 225 /* 'chain' the pbuf to the existing chain */
ninoderkinderen 0:8d87bc453349 226 pbuf_cat(priv->q, priv->p);
ninoderkinderen 0:8d87bc453349 227 } else {
ninoderkinderen 0:8d87bc453349 228 /* p is the first pbuf in the chain */
ninoderkinderen 0:8d87bc453349 229 priv->q = priv->p;
ninoderkinderen 0:8d87bc453349 230 }
ninoderkinderen 0:8d87bc453349 231 }
ninoderkinderen 0:8d87bc453349 232
ninoderkinderen 0:8d87bc453349 233 /* this automatically drops bytes if > SLIP_MAX_SIZE */
ninoderkinderen 0:8d87bc453349 234 if ((priv->p != NULL) && (priv->recved <= SLIP_MAX_SIZE)) {
ninoderkinderen 0:8d87bc453349 235 ((u8_t *)priv->p->payload)[priv->i] = c;
ninoderkinderen 0:8d87bc453349 236 priv->recved++;
ninoderkinderen 0:8d87bc453349 237 priv->i++;
ninoderkinderen 0:8d87bc453349 238 if (priv->i >= priv->p->len) {
ninoderkinderen 0:8d87bc453349 239 /* on to the next pbuf */
ninoderkinderen 0:8d87bc453349 240 priv->i = 0;
ninoderkinderen 0:8d87bc453349 241 if (priv->p->next != NULL && priv->p->next->len > 0) {
ninoderkinderen 0:8d87bc453349 242 /* p is a chain, on to the next in the chain */
ninoderkinderen 0:8d87bc453349 243 priv->p = priv->p->next;
ninoderkinderen 0:8d87bc453349 244 } else {
ninoderkinderen 0:8d87bc453349 245 /* p is a single pbuf, set it to NULL so next time a new
ninoderkinderen 0:8d87bc453349 246 * pbuf is allocated */
ninoderkinderen 0:8d87bc453349 247 priv->p = NULL;
ninoderkinderen 0:8d87bc453349 248 }
ninoderkinderen 0:8d87bc453349 249 }
ninoderkinderen 0:8d87bc453349 250 }
ninoderkinderen 0:8d87bc453349 251 }
ninoderkinderen 0:8d87bc453349 252
ninoderkinderen 0:8d87bc453349 253 return NULL;
ninoderkinderen 0:8d87bc453349 254 }
ninoderkinderen 0:8d87bc453349 255
ninoderkinderen 0:8d87bc453349 256 #if !NO_SYS
ninoderkinderen 0:8d87bc453349 257 /**
ninoderkinderen 0:8d87bc453349 258 * The SLIP input thread.
ninoderkinderen 0:8d87bc453349 259 *
ninoderkinderen 0:8d87bc453349 260 * Feed the IP layer with incoming packets
ninoderkinderen 0:8d87bc453349 261 *
ninoderkinderen 0:8d87bc453349 262 * @param nf the lwip network interface structure for this slipif
ninoderkinderen 0:8d87bc453349 263 */
ninoderkinderen 0:8d87bc453349 264 static void
ninoderkinderen 0:8d87bc453349 265 slipif_loop_thread(void *nf)
ninoderkinderen 0:8d87bc453349 266 {
ninoderkinderen 0:8d87bc453349 267 struct pbuf *p;
ninoderkinderen 0:8d87bc453349 268 struct netif *netif = (struct netif *)nf;
ninoderkinderen 0:8d87bc453349 269
ninoderkinderen 0:8d87bc453349 270 while (1) {
ninoderkinderen 0:8d87bc453349 271 p = slipif_input(netif, SLIP_BLOCK);
ninoderkinderen 0:8d87bc453349 272 if (p != NULL) {
ninoderkinderen 0:8d87bc453349 273 if (netif->input(p, netif) != ERR_OK) {
ninoderkinderen 0:8d87bc453349 274 pbuf_free(p);
ninoderkinderen 0:8d87bc453349 275 p = NULL;
ninoderkinderen 0:8d87bc453349 276 }
ninoderkinderen 0:8d87bc453349 277 }
ninoderkinderen 0:8d87bc453349 278 }
ninoderkinderen 0:8d87bc453349 279 }
ninoderkinderen 0:8d87bc453349 280 #endif /* !NO_SYS */
ninoderkinderen 0:8d87bc453349 281
ninoderkinderen 0:8d87bc453349 282 /**
ninoderkinderen 0:8d87bc453349 283 * SLIP netif initialization
ninoderkinderen 0:8d87bc453349 284 *
ninoderkinderen 0:8d87bc453349 285 * Call the arch specific sio_open and remember
ninoderkinderen 0:8d87bc453349 286 * the opened device in the state field of the netif.
ninoderkinderen 0:8d87bc453349 287 *
ninoderkinderen 0:8d87bc453349 288 * @param netif the lwip network interface structure for this slipif
ninoderkinderen 0:8d87bc453349 289 * @return ERR_OK if serial line could be opened,
ninoderkinderen 0:8d87bc453349 290 * ERR_MEM if no memory could be allocated,
ninoderkinderen 0:8d87bc453349 291 * ERR_IF is serial line couldn't be opened
ninoderkinderen 0:8d87bc453349 292 *
ninoderkinderen 0:8d87bc453349 293 * @note netif->num must contain the number of the serial port to open
ninoderkinderen 0:8d87bc453349 294 * (0 by default)
ninoderkinderen 0:8d87bc453349 295 */
ninoderkinderen 0:8d87bc453349 296 err_t
ninoderkinderen 0:8d87bc453349 297 slipif_init(struct netif *netif)
ninoderkinderen 0:8d87bc453349 298 {
ninoderkinderen 0:8d87bc453349 299 struct slipif_priv *priv;
ninoderkinderen 0:8d87bc453349 300
ninoderkinderen 0:8d87bc453349 301 LWIP_DEBUGF(SLIP_DEBUG, ("slipif_init: netif->num=%"U16_F"\n", (u16_t)netif->num));
ninoderkinderen 0:8d87bc453349 302
ninoderkinderen 0:8d87bc453349 303 /* Allocate private data */
ninoderkinderen 0:8d87bc453349 304 priv = mem_malloc(sizeof(struct slipif_priv));
ninoderkinderen 0:8d87bc453349 305 if (!priv) {
ninoderkinderen 0:8d87bc453349 306 return ERR_MEM;
ninoderkinderen 0:8d87bc453349 307 }
ninoderkinderen 0:8d87bc453349 308
ninoderkinderen 0:8d87bc453349 309 netif->name[0] = 's';
ninoderkinderen 0:8d87bc453349 310 netif->name[1] = 'l';
ninoderkinderen 0:8d87bc453349 311 netif->output = slipif_output;
ninoderkinderen 0:8d87bc453349 312 netif->mtu = SLIP_MAX_SIZE;
ninoderkinderen 0:8d87bc453349 313 netif->flags |= NETIF_FLAG_POINTTOPOINT;
ninoderkinderen 0:8d87bc453349 314
ninoderkinderen 0:8d87bc453349 315 /* Try to open the serial port (netif->num contains the port number). */
ninoderkinderen 0:8d87bc453349 316 priv->sd = sio_open(netif->num);
ninoderkinderen 0:8d87bc453349 317 if (!priv->sd) {
ninoderkinderen 0:8d87bc453349 318 /* Opening the serial port failed. */
ninoderkinderen 0:8d87bc453349 319 mem_free(priv);
ninoderkinderen 0:8d87bc453349 320 return ERR_IF;
ninoderkinderen 0:8d87bc453349 321 }
ninoderkinderen 0:8d87bc453349 322
ninoderkinderen 0:8d87bc453349 323 /* Initialize private data */
ninoderkinderen 0:8d87bc453349 324 priv->p = NULL;
ninoderkinderen 0:8d87bc453349 325 priv->q = NULL;
ninoderkinderen 0:8d87bc453349 326 priv->state = SLIP_RECV_NORMAL;
ninoderkinderen 0:8d87bc453349 327 priv->i = 0;
ninoderkinderen 0:8d87bc453349 328 priv->recved = 0;
ninoderkinderen 0:8d87bc453349 329
ninoderkinderen 0:8d87bc453349 330 netif->state = priv;
ninoderkinderen 0:8d87bc453349 331
ninoderkinderen 0:8d87bc453349 332 /* initialize the snmp variables and counters inside the struct netif
ninoderkinderen 0:8d87bc453349 333 * ifSpeed: no assumption can be made without knowing more about the
ninoderkinderen 0:8d87bc453349 334 * serial line!
ninoderkinderen 0:8d87bc453349 335 */
ninoderkinderen 0:8d87bc453349 336 NETIF_INIT_SNMP(netif, snmp_ifType_slip, 0);
ninoderkinderen 0:8d87bc453349 337
ninoderkinderen 0:8d87bc453349 338 /* Create a thread to poll the serial line. */
ninoderkinderen 0:8d87bc453349 339 sys_thread_new(SLIPIF_THREAD_NAME, slipif_loop_thread, netif,
ninoderkinderen 0:8d87bc453349 340 SLIPIF_THREAD_STACKSIZE, SLIPIF_THREAD_PRIO);
ninoderkinderen 0:8d87bc453349 341 return ERR_OK;
ninoderkinderen 0:8d87bc453349 342 }
ninoderkinderen 0:8d87bc453349 343
ninoderkinderen 0:8d87bc453349 344 /**
ninoderkinderen 0:8d87bc453349 345 * Polls the serial device and feeds the IP layer with incoming packets.
ninoderkinderen 0:8d87bc453349 346 *
ninoderkinderen 0:8d87bc453349 347 * @param netif The lwip network interface structure for this slipif
ninoderkinderen 0:8d87bc453349 348 */
ninoderkinderen 0:8d87bc453349 349 void
ninoderkinderen 0:8d87bc453349 350 slipif_poll(struct netif *netif)
ninoderkinderen 0:8d87bc453349 351 {
ninoderkinderen 0:8d87bc453349 352 struct pbuf *p;
ninoderkinderen 0:8d87bc453349 353 struct slipif_priv *priv;
ninoderkinderen 0:8d87bc453349 354
ninoderkinderen 0:8d87bc453349 355 LWIP_ASSERT("netif != NULL", (netif != NULL));
ninoderkinderen 0:8d87bc453349 356 LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
ninoderkinderen 0:8d87bc453349 357
ninoderkinderen 0:8d87bc453349 358 priv = netif->state;
ninoderkinderen 0:8d87bc453349 359
ninoderkinderen 0:8d87bc453349 360 while ((p = slipif_input(netif, SLIP_DONTBLOCK)) != NULL) {
ninoderkinderen 0:8d87bc453349 361 if (netif->input(p, netif) != ERR_OK) {
ninoderkinderen 0:8d87bc453349 362 pbuf_free(p);
ninoderkinderen 0:8d87bc453349 363 }
ninoderkinderen 0:8d87bc453349 364 }
ninoderkinderen 0:8d87bc453349 365 }
ninoderkinderen 0:8d87bc453349 366
ninoderkinderen 0:8d87bc453349 367 #endif /* LWIP_HAVE_SLIPIF */