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NetServices/lwip/netif/slipif.c@0:05ccbd4f84f1, 2013-12-02 (annotated)

Committer:
hendrikvincent
Date:
Mon Dec 02 09:01:23 2013 +0000
Revision:
0:05ccbd4f84f1
eerste programma;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hendrikvincent 0:05ccbd4f84f1 1 /**
hendrikvincent 0:05ccbd4f84f1 2 * @file
hendrikvincent 0:05ccbd4f84f1 3 * SLIP Interface
hendrikvincent 0:05ccbd4f84f1 4 *
hendrikvincent 0:05ccbd4f84f1 5 */
hendrikvincent 0:05ccbd4f84f1 6
hendrikvincent 0:05ccbd4f84f1 7 /*
hendrikvincent 0:05ccbd4f84f1 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
hendrikvincent 0:05ccbd4f84f1 9 * All rights reserved.
hendrikvincent 0:05ccbd4f84f1 10 *
hendrikvincent 0:05ccbd4f84f1 11 * Redistribution and use in source and binary forms, with or without
hendrikvincent 0:05ccbd4f84f1 12 * modification, are permitted provided that the following conditions
hendrikvincent 0:05ccbd4f84f1 13 * are met:
hendrikvincent 0:05ccbd4f84f1 14 * 1. Redistributions of source code must retain the above copyright
hendrikvincent 0:05ccbd4f84f1 15 * notice, this list of conditions and the following disclaimer.
hendrikvincent 0:05ccbd4f84f1 16 * 2. Redistributions in binary form must reproduce the above copyright
hendrikvincent 0:05ccbd4f84f1 17 * notice, this list of conditions and the following disclaimer in the
hendrikvincent 0:05ccbd4f84f1 18 * documentation and/or other materials provided with the distribution.
hendrikvincent 0:05ccbd4f84f1 19 * 3. Neither the name of the Institute nor the names of its contributors
hendrikvincent 0:05ccbd4f84f1 20 * may be used to endorse or promote products derived from this software
hendrikvincent 0:05ccbd4f84f1 21 * without specific prior written permission.
hendrikvincent 0:05ccbd4f84f1 22 *
hendrikvincent 0:05ccbd4f84f1 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
hendrikvincent 0:05ccbd4f84f1 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
hendrikvincent 0:05ccbd4f84f1 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
hendrikvincent 0:05ccbd4f84f1 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
hendrikvincent 0:05ccbd4f84f1 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
hendrikvincent 0:05ccbd4f84f1 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
hendrikvincent 0:05ccbd4f84f1 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
hendrikvincent 0:05ccbd4f84f1 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
hendrikvincent 0:05ccbd4f84f1 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
hendrikvincent 0:05ccbd4f84f1 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
hendrikvincent 0:05ccbd4f84f1 33 * SUCH DAMAGE.
hendrikvincent 0:05ccbd4f84f1 34 *
hendrikvincent 0:05ccbd4f84f1 35 * This file is built upon the file: src/arch/rtxc/netif/sioslip.c
hendrikvincent 0:05ccbd4f84f1 36 *
hendrikvincent 0:05ccbd4f84f1 37 * Author: Magnus Ivarsson <magnus.ivarsson(at)volvo.com>
hendrikvincent 0:05ccbd4f84f1 38 */
hendrikvincent 0:05ccbd4f84f1 39
hendrikvincent 0:05ccbd4f84f1 40 /*
hendrikvincent 0:05ccbd4f84f1 41 * This is an arch independent SLIP netif. The specific serial hooks must be
hendrikvincent 0:05ccbd4f84f1 42 * provided by another file. They are sio_open, sio_read/sio_tryread and sio_send
hendrikvincent 0:05ccbd4f84f1 43 */
hendrikvincent 0:05ccbd4f84f1 44
hendrikvincent 0:05ccbd4f84f1 45 #include "netif/slipif.h"
hendrikvincent 0:05ccbd4f84f1 46 #include "lwip/opt.h"
hendrikvincent 0:05ccbd4f84f1 47
hendrikvincent 0:05ccbd4f84f1 48 #if LWIP_HAVE_SLIPIF
hendrikvincent 0:05ccbd4f84f1 49
hendrikvincent 0:05ccbd4f84f1 50 #include "lwip/def.h"
hendrikvincent 0:05ccbd4f84f1 51 #include "lwip/pbuf.h"
hendrikvincent 0:05ccbd4f84f1 52 #include "lwip/sys.h"
hendrikvincent 0:05ccbd4f84f1 53 #include "lwip/stats.h"
hendrikvincent 0:05ccbd4f84f1 54 #include "lwip/snmp.h"
hendrikvincent 0:05ccbd4f84f1 55 #include "lwip/sio.h"
hendrikvincent 0:05ccbd4f84f1 56
hendrikvincent 0:05ccbd4f84f1 57 #define SLIP_BLOCK 1
hendrikvincent 0:05ccbd4f84f1 58 #define SLIP_DONTBLOCK 0
hendrikvincent 0:05ccbd4f84f1 59
hendrikvincent 0:05ccbd4f84f1 60 #define SLIP_END 0300 /* 0xC0 */
hendrikvincent 0:05ccbd4f84f1 61 #define SLIP_ESC 0333 /* 0xDB */
hendrikvincent 0:05ccbd4f84f1 62 #define SLIP_ESC_END 0334 /* 0xDC */
hendrikvincent 0:05ccbd4f84f1 63 #define SLIP_ESC_ESC 0335 /* 0xDD */
hendrikvincent 0:05ccbd4f84f1 64
hendrikvincent 0:05ccbd4f84f1 65 #define SLIP_MAX_SIZE 1500
hendrikvincent 0:05ccbd4f84f1 66
hendrikvincent 0:05ccbd4f84f1 67 enum slipif_recv_state {
hendrikvincent 0:05ccbd4f84f1 68 SLIP_RECV_NORMAL,
hendrikvincent 0:05ccbd4f84f1 69 SLIP_RECV_ESCAPE,
hendrikvincent 0:05ccbd4f84f1 70 };
hendrikvincent 0:05ccbd4f84f1 71
hendrikvincent 0:05ccbd4f84f1 72 struct slipif_priv {
hendrikvincent 0:05ccbd4f84f1 73 sio_fd_t sd;
hendrikvincent 0:05ccbd4f84f1 74 /* q is the whole pbuf chain for a packet, p is the current pbuf in the chain */
hendrikvincent 0:05ccbd4f84f1 75 struct pbuf *p, *q;
hendrikvincent 0:05ccbd4f84f1 76 enum slipif_recv_state state;
hendrikvincent 0:05ccbd4f84f1 77 u16_t i, recved;
hendrikvincent 0:05ccbd4f84f1 78 };
hendrikvincent 0:05ccbd4f84f1 79
hendrikvincent 0:05ccbd4f84f1 80 /**
hendrikvincent 0:05ccbd4f84f1 81 * Send a pbuf doing the necessary SLIP encapsulation
hendrikvincent 0:05ccbd4f84f1 82 *
hendrikvincent 0:05ccbd4f84f1 83 * Uses the serial layer's sio_send()
hendrikvincent 0:05ccbd4f84f1 84 *
hendrikvincent 0:05ccbd4f84f1 85 * @param netif the lwip network interface structure for this slipif
hendrikvincent 0:05ccbd4f84f1 86 * @param p the pbuf chaing packet to send
hendrikvincent 0:05ccbd4f84f1 87 * @param ipaddr the ip address to send the packet to (not used for slipif)
hendrikvincent 0:05ccbd4f84f1 88 * @return always returns ERR_OK since the serial layer does not provide return values
hendrikvincent 0:05ccbd4f84f1 89 */
hendrikvincent 0:05ccbd4f84f1 90 err_t
hendrikvincent 0:05ccbd4f84f1 91 slipif_output(struct netif *netif, struct pbuf *p, ip_addr_t *ipaddr)
hendrikvincent 0:05ccbd4f84f1 92 {
hendrikvincent 0:05ccbd4f84f1 93 struct slipif_priv *priv;
hendrikvincent 0:05ccbd4f84f1 94 struct pbuf *q;
hendrikvincent 0:05ccbd4f84f1 95 u16_t i;
hendrikvincent 0:05ccbd4f84f1 96 u8_t c;
hendrikvincent 0:05ccbd4f84f1 97
hendrikvincent 0:05ccbd4f84f1 98 LWIP_ASSERT("netif != NULL", (netif != NULL));
hendrikvincent 0:05ccbd4f84f1 99 LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
hendrikvincent 0:05ccbd4f84f1 100 LWIP_ASSERT("p != NULL", (p != NULL));
hendrikvincent 0:05ccbd4f84f1 101
hendrikvincent 0:05ccbd4f84f1 102 LWIP_UNUSED_ARG(ipaddr);
hendrikvincent 0:05ccbd4f84f1 103
hendrikvincent 0:05ccbd4f84f1 104 priv = netif->state;
hendrikvincent 0:05ccbd4f84f1 105
hendrikvincent 0:05ccbd4f84f1 106 /* Send pbuf out on the serial I/O device. */
hendrikvincent 0:05ccbd4f84f1 107 sio_send(SLIP_END, priv->sd);
hendrikvincent 0:05ccbd4f84f1 108
hendrikvincent 0:05ccbd4f84f1 109 for (q = p; q != NULL; q = q->next) {
hendrikvincent 0:05ccbd4f84f1 110 for (i = 0; i < q->len; i++) {
hendrikvincent 0:05ccbd4f84f1 111 c = ((u8_t *)q->payload)[i];
hendrikvincent 0:05ccbd4f84f1 112 switch (c) {
hendrikvincent 0:05ccbd4f84f1 113 case SLIP_END:
hendrikvincent 0:05ccbd4f84f1 114 sio_send(SLIP_ESC, priv->sd);
hendrikvincent 0:05ccbd4f84f1 115 sio_send(SLIP_ESC_END, priv->sd);
hendrikvincent 0:05ccbd4f84f1 116 break;
hendrikvincent 0:05ccbd4f84f1 117 case SLIP_ESC:
hendrikvincent 0:05ccbd4f84f1 118 sio_send(SLIP_ESC, priv->sd);
hendrikvincent 0:05ccbd4f84f1 119 sio_send(SLIP_ESC_ESC, priv->sd);
hendrikvincent 0:05ccbd4f84f1 120 break;
hendrikvincent 0:05ccbd4f84f1 121 default:
hendrikvincent 0:05ccbd4f84f1 122 sio_send(c, priv->sd);
hendrikvincent 0:05ccbd4f84f1 123 break;
hendrikvincent 0:05ccbd4f84f1 124 }
hendrikvincent 0:05ccbd4f84f1 125 }
hendrikvincent 0:05ccbd4f84f1 126 }
hendrikvincent 0:05ccbd4f84f1 127 sio_send(SLIP_END, priv->sd);
hendrikvincent 0:05ccbd4f84f1 128 return ERR_OK;
hendrikvincent 0:05ccbd4f84f1 129 }
hendrikvincent 0:05ccbd4f84f1 130
hendrikvincent 0:05ccbd4f84f1 131 /**
hendrikvincent 0:05ccbd4f84f1 132 * Static function for easy use of blockig or non-blocking
hendrikvincent 0:05ccbd4f84f1 133 * sio_read
hendrikvincent 0:05ccbd4f84f1 134 *
hendrikvincent 0:05ccbd4f84f1 135 * @param fd serial device handle
hendrikvincent 0:05ccbd4f84f1 136 * @param data pointer to data buffer for receiving
hendrikvincent 0:05ccbd4f84f1 137 * @param len maximum length (in bytes) of data to receive
hendrikvincent 0:05ccbd4f84f1 138 * @param block if 1, call sio_read; if 0, call sio_tryread
hendrikvincent 0:05ccbd4f84f1 139 * @return return value of sio_read of sio_tryread
hendrikvincent 0:05ccbd4f84f1 140 */
hendrikvincent 0:05ccbd4f84f1 141 static u32_t
hendrikvincent 0:05ccbd4f84f1 142 slip_sio_read(sio_fd_t fd, u8_t* data, u32_t len, u8_t block)
hendrikvincent 0:05ccbd4f84f1 143 {
hendrikvincent 0:05ccbd4f84f1 144 if (block) {
hendrikvincent 0:05ccbd4f84f1 145 return sio_read(fd, data, len);
hendrikvincent 0:05ccbd4f84f1 146 } else {
hendrikvincent 0:05ccbd4f84f1 147 return sio_tryread(fd, data, len);
hendrikvincent 0:05ccbd4f84f1 148 }
hendrikvincent 0:05ccbd4f84f1 149 }
hendrikvincent 0:05ccbd4f84f1 150
hendrikvincent 0:05ccbd4f84f1 151 /**
hendrikvincent 0:05ccbd4f84f1 152 * Handle the incoming SLIP stream character by character
hendrikvincent 0:05ccbd4f84f1 153 *
hendrikvincent 0:05ccbd4f84f1 154 * Poll the serial layer by calling sio_read() or sio_tryread().
hendrikvincent 0:05ccbd4f84f1 155 *
hendrikvincent 0:05ccbd4f84f1 156 * @param netif the lwip network interface structure for this slipif
hendrikvincent 0:05ccbd4f84f1 157 * @param block if 1, block until data is received; if 0, return when all data
hendrikvincent 0:05ccbd4f84f1 158 * from the buffer is received (multiple calls to this function will
hendrikvincent 0:05ccbd4f84f1 159 * return a complete packet, NULL is returned before - used for polling)
hendrikvincent 0:05ccbd4f84f1 160 * @return The IP packet when SLIP_END is received
hendrikvincent 0:05ccbd4f84f1 161 */
hendrikvincent 0:05ccbd4f84f1 162 static struct pbuf *
hendrikvincent 0:05ccbd4f84f1 163 slipif_input(struct netif *netif, u8_t block)
hendrikvincent 0:05ccbd4f84f1 164 {
hendrikvincent 0:05ccbd4f84f1 165 struct slipif_priv *priv;
hendrikvincent 0:05ccbd4f84f1 166 u8_t c;
hendrikvincent 0:05ccbd4f84f1 167 struct pbuf *t;
hendrikvincent 0:05ccbd4f84f1 168
hendrikvincent 0:05ccbd4f84f1 169 LWIP_ASSERT("netif != NULL", (netif != NULL));
hendrikvincent 0:05ccbd4f84f1 170 LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
hendrikvincent 0:05ccbd4f84f1 171
hendrikvincent 0:05ccbd4f84f1 172 priv = netif->state;
hendrikvincent 0:05ccbd4f84f1 173
hendrikvincent 0:05ccbd4f84f1 174 while (slip_sio_read(priv->sd, &c, 1, block) > 0) {
hendrikvincent 0:05ccbd4f84f1 175 switch (priv->state) {
hendrikvincent 0:05ccbd4f84f1 176 case SLIP_RECV_NORMAL:
hendrikvincent 0:05ccbd4f84f1 177 switch (c) {
hendrikvincent 0:05ccbd4f84f1 178 case SLIP_END:
hendrikvincent 0:05ccbd4f84f1 179 if (priv->recved > 0) {
hendrikvincent 0:05ccbd4f84f1 180 /* Received whole packet. */
hendrikvincent 0:05ccbd4f84f1 181 /* Trim the pbuf to the size of the received packet. */
hendrikvincent 0:05ccbd4f84f1 182 pbuf_realloc(priv->q, priv->recved);
hendrikvincent 0:05ccbd4f84f1 183
hendrikvincent 0:05ccbd4f84f1 184 LINK_STATS_INC(link.recv);
hendrikvincent 0:05ccbd4f84f1 185
hendrikvincent 0:05ccbd4f84f1 186 LWIP_DEBUGF(SLIP_DEBUG, ("slipif: Got packet\n"));
hendrikvincent 0:05ccbd4f84f1 187 t = priv->q;
hendrikvincent 0:05ccbd4f84f1 188 priv->p = priv->q = NULL;
hendrikvincent 0:05ccbd4f84f1 189 priv->i = priv->recved = 0;
hendrikvincent 0:05ccbd4f84f1 190 return t;
hendrikvincent 0:05ccbd4f84f1 191 }
hendrikvincent 0:05ccbd4f84f1 192 continue;
hendrikvincent 0:05ccbd4f84f1 193 case SLIP_ESC:
hendrikvincent 0:05ccbd4f84f1 194 priv->state = SLIP_RECV_ESCAPE;
hendrikvincent 0:05ccbd4f84f1 195 continue;
hendrikvincent 0:05ccbd4f84f1 196 }
hendrikvincent 0:05ccbd4f84f1 197 break;
hendrikvincent 0:05ccbd4f84f1 198 case SLIP_RECV_ESCAPE:
hendrikvincent 0:05ccbd4f84f1 199 switch (c) {
hendrikvincent 0:05ccbd4f84f1 200 case SLIP_ESC_END:
hendrikvincent 0:05ccbd4f84f1 201 c = SLIP_END;
hendrikvincent 0:05ccbd4f84f1 202 break;
hendrikvincent 0:05ccbd4f84f1 203 case SLIP_ESC_ESC:
hendrikvincent 0:05ccbd4f84f1 204 c = SLIP_ESC;
hendrikvincent 0:05ccbd4f84f1 205 break;
hendrikvincent 0:05ccbd4f84f1 206 }
hendrikvincent 0:05ccbd4f84f1 207 priv->state = SLIP_RECV_NORMAL;
hendrikvincent 0:05ccbd4f84f1 208 /* FALLTHROUGH */
hendrikvincent 0:05ccbd4f84f1 209 }
hendrikvincent 0:05ccbd4f84f1 210
hendrikvincent 0:05ccbd4f84f1 211 /* byte received, packet not yet completely received */
hendrikvincent 0:05ccbd4f84f1 212 if (priv->p == NULL) {
hendrikvincent 0:05ccbd4f84f1 213 /* allocate a new pbuf */
hendrikvincent 0:05ccbd4f84f1 214 LWIP_DEBUGF(SLIP_DEBUG, ("slipif_input: alloc\n"));
hendrikvincent 0:05ccbd4f84f1 215 priv->p = pbuf_alloc(PBUF_LINK, (PBUF_POOL_BUFSIZE - PBUF_LINK_HLEN), PBUF_POOL);
hendrikvincent 0:05ccbd4f84f1 216
hendrikvincent 0:05ccbd4f84f1 217 if (priv->p == NULL) {
hendrikvincent 0:05ccbd4f84f1 218 LINK_STATS_INC(link.drop);
hendrikvincent 0:05ccbd4f84f1 219 LWIP_DEBUGF(SLIP_DEBUG, ("slipif_input: no new pbuf! (DROP)\n"));
hendrikvincent 0:05ccbd4f84f1 220 /* don't process any further since we got no pbuf to receive to */
hendrikvincent 0:05ccbd4f84f1 221 break;
hendrikvincent 0:05ccbd4f84f1 222 }
hendrikvincent 0:05ccbd4f84f1 223
hendrikvincent 0:05ccbd4f84f1 224 if (priv->q != NULL) {
hendrikvincent 0:05ccbd4f84f1 225 /* 'chain' the pbuf to the existing chain */
hendrikvincent 0:05ccbd4f84f1 226 pbuf_cat(priv->q, priv->p);
hendrikvincent 0:05ccbd4f84f1 227 } else {
hendrikvincent 0:05ccbd4f84f1 228 /* p is the first pbuf in the chain */
hendrikvincent 0:05ccbd4f84f1 229 priv->q = priv->p;
hendrikvincent 0:05ccbd4f84f1 230 }
hendrikvincent 0:05ccbd4f84f1 231 }
hendrikvincent 0:05ccbd4f84f1 232
hendrikvincent 0:05ccbd4f84f1 233 /* this automatically drops bytes if > SLIP_MAX_SIZE */
hendrikvincent 0:05ccbd4f84f1 234 if ((priv->p != NULL) && (priv->recved <= SLIP_MAX_SIZE)) {
hendrikvincent 0:05ccbd4f84f1 235 ((u8_t *)priv->p->payload)[priv->i] = c;
hendrikvincent 0:05ccbd4f84f1 236 priv->recved++;
hendrikvincent 0:05ccbd4f84f1 237 priv->i++;
hendrikvincent 0:05ccbd4f84f1 238 if (priv->i >= priv->p->len) {
hendrikvincent 0:05ccbd4f84f1 239 /* on to the next pbuf */
hendrikvincent 0:05ccbd4f84f1 240 priv->i = 0;
hendrikvincent 0:05ccbd4f84f1 241 if (priv->p->next != NULL && priv->p->next->len > 0) {
hendrikvincent 0:05ccbd4f84f1 242 /* p is a chain, on to the next in the chain */
hendrikvincent 0:05ccbd4f84f1 243 priv->p = priv->p->next;
hendrikvincent 0:05ccbd4f84f1 244 } else {
hendrikvincent 0:05ccbd4f84f1 245 /* p is a single pbuf, set it to NULL so next time a new
hendrikvincent 0:05ccbd4f84f1 246 * pbuf is allocated */
hendrikvincent 0:05ccbd4f84f1 247 priv->p = NULL;
hendrikvincent 0:05ccbd4f84f1 248 }
hendrikvincent 0:05ccbd4f84f1 249 }
hendrikvincent 0:05ccbd4f84f1 250 }
hendrikvincent 0:05ccbd4f84f1 251 }
hendrikvincent 0:05ccbd4f84f1 252
hendrikvincent 0:05ccbd4f84f1 253 return NULL;
hendrikvincent 0:05ccbd4f84f1 254 }
hendrikvincent 0:05ccbd4f84f1 255
hendrikvincent 0:05ccbd4f84f1 256 #if !NO_SYS
hendrikvincent 0:05ccbd4f84f1 257 /**
hendrikvincent 0:05ccbd4f84f1 258 * The SLIP input thread.
hendrikvincent 0:05ccbd4f84f1 259 *
hendrikvincent 0:05ccbd4f84f1 260 * Feed the IP layer with incoming packets
hendrikvincent 0:05ccbd4f84f1 261 *
hendrikvincent 0:05ccbd4f84f1 262 * @param nf the lwip network interface structure for this slipif
hendrikvincent 0:05ccbd4f84f1 263 */
hendrikvincent 0:05ccbd4f84f1 264 static void
hendrikvincent 0:05ccbd4f84f1 265 slipif_loop_thread(void *nf)
hendrikvincent 0:05ccbd4f84f1 266 {
hendrikvincent 0:05ccbd4f84f1 267 struct pbuf *p;
hendrikvincent 0:05ccbd4f84f1 268 struct netif *netif = (struct netif *)nf;
hendrikvincent 0:05ccbd4f84f1 269
hendrikvincent 0:05ccbd4f84f1 270 while (1) {
hendrikvincent 0:05ccbd4f84f1 271 p = slipif_input(netif, SLIP_BLOCK);
hendrikvincent 0:05ccbd4f84f1 272 if (p != NULL) {
hendrikvincent 0:05ccbd4f84f1 273 if (netif->input(p, netif) != ERR_OK) {
hendrikvincent 0:05ccbd4f84f1 274 pbuf_free(p);
hendrikvincent 0:05ccbd4f84f1 275 p = NULL;
hendrikvincent 0:05ccbd4f84f1 276 }
hendrikvincent 0:05ccbd4f84f1 277 }
hendrikvincent 0:05ccbd4f84f1 278 }
hendrikvincent 0:05ccbd4f84f1 279 }
hendrikvincent 0:05ccbd4f84f1 280 #endif /* !NO_SYS */
hendrikvincent 0:05ccbd4f84f1 281
hendrikvincent 0:05ccbd4f84f1 282 /**
hendrikvincent 0:05ccbd4f84f1 283 * SLIP netif initialization
hendrikvincent 0:05ccbd4f84f1 284 *
hendrikvincent 0:05ccbd4f84f1 285 * Call the arch specific sio_open and remember
hendrikvincent 0:05ccbd4f84f1 286 * the opened device in the state field of the netif.
hendrikvincent 0:05ccbd4f84f1 287 *
hendrikvincent 0:05ccbd4f84f1 288 * @param netif the lwip network interface structure for this slipif
hendrikvincent 0:05ccbd4f84f1 289 * @return ERR_OK if serial line could be opened,
hendrikvincent 0:05ccbd4f84f1 290 * ERR_MEM if no memory could be allocated,
hendrikvincent 0:05ccbd4f84f1 291 * ERR_IF is serial line couldn't be opened
hendrikvincent 0:05ccbd4f84f1 292 *
hendrikvincent 0:05ccbd4f84f1 293 * @note netif->num must contain the number of the serial port to open
hendrikvincent 0:05ccbd4f84f1 294 * (0 by default)
hendrikvincent 0:05ccbd4f84f1 295 */
hendrikvincent 0:05ccbd4f84f1 296 err_t
hendrikvincent 0:05ccbd4f84f1 297 slipif_init(struct netif *netif)
hendrikvincent 0:05ccbd4f84f1 298 {
hendrikvincent 0:05ccbd4f84f1 299 struct slipif_priv *priv;
hendrikvincent 0:05ccbd4f84f1 300
hendrikvincent 0:05ccbd4f84f1 301 LWIP_DEBUGF(SLIP_DEBUG, ("slipif_init: netif->num=%"U16_F"\n", (u16_t)netif->num));
hendrikvincent 0:05ccbd4f84f1 302
hendrikvincent 0:05ccbd4f84f1 303 /* Allocate private data */
hendrikvincent 0:05ccbd4f84f1 304 priv = mem_malloc(sizeof(struct slipif_priv));
hendrikvincent 0:05ccbd4f84f1 305 if (!priv) {
hendrikvincent 0:05ccbd4f84f1 306 return ERR_MEM;
hendrikvincent 0:05ccbd4f84f1 307 }
hendrikvincent 0:05ccbd4f84f1 308
hendrikvincent 0:05ccbd4f84f1 309 netif->name[0] = 's';
hendrikvincent 0:05ccbd4f84f1 310 netif->name[1] = 'l';
hendrikvincent 0:05ccbd4f84f1 311 netif->output = slipif_output;
hendrikvincent 0:05ccbd4f84f1 312 netif->mtu = SLIP_MAX_SIZE;
hendrikvincent 0:05ccbd4f84f1 313 netif->flags |= NETIF_FLAG_POINTTOPOINT;
hendrikvincent 0:05ccbd4f84f1 314
hendrikvincent 0:05ccbd4f84f1 315 /* Try to open the serial port (netif->num contains the port number). */
hendrikvincent 0:05ccbd4f84f1 316 priv->sd = sio_open(netif->num);
hendrikvincent 0:05ccbd4f84f1 317 if (!priv->sd) {
hendrikvincent 0:05ccbd4f84f1 318 /* Opening the serial port failed. */
hendrikvincent 0:05ccbd4f84f1 319 mem_free(priv);
hendrikvincent 0:05ccbd4f84f1 320 return ERR_IF;
hendrikvincent 0:05ccbd4f84f1 321 }
hendrikvincent 0:05ccbd4f84f1 322
hendrikvincent 0:05ccbd4f84f1 323 /* Initialize private data */
hendrikvincent 0:05ccbd4f84f1 324 priv->p = NULL;
hendrikvincent 0:05ccbd4f84f1 325 priv->q = NULL;
hendrikvincent 0:05ccbd4f84f1 326 priv->state = SLIP_RECV_NORMAL;
hendrikvincent 0:05ccbd4f84f1 327 priv->i = 0;
hendrikvincent 0:05ccbd4f84f1 328 priv->recved = 0;
hendrikvincent 0:05ccbd4f84f1 329
hendrikvincent 0:05ccbd4f84f1 330 netif->state = priv;
hendrikvincent 0:05ccbd4f84f1 331
hendrikvincent 0:05ccbd4f84f1 332 /* initialize the snmp variables and counters inside the struct netif
hendrikvincent 0:05ccbd4f84f1 333 * ifSpeed: no assumption can be made without knowing more about the
hendrikvincent 0:05ccbd4f84f1 334 * serial line!
hendrikvincent 0:05ccbd4f84f1 335 */
hendrikvincent 0:05ccbd4f84f1 336 NETIF_INIT_SNMP(netif, snmp_ifType_slip, 0);
hendrikvincent 0:05ccbd4f84f1 337
hendrikvincent 0:05ccbd4f84f1 338 /* Create a thread to poll the serial line. */
hendrikvincent 0:05ccbd4f84f1 339 sys_thread_new(SLIPIF_THREAD_NAME, slipif_loop_thread, netif,
hendrikvincent 0:05ccbd4f84f1 340 SLIPIF_THREAD_STACKSIZE, SLIPIF_THREAD_PRIO);
hendrikvincent 0:05ccbd4f84f1 341 return ERR_OK;
hendrikvincent 0:05ccbd4f84f1 342 }
hendrikvincent 0:05ccbd4f84f1 343
hendrikvincent 0:05ccbd4f84f1 344 /**
hendrikvincent 0:05ccbd4f84f1 345 * Polls the serial device and feeds the IP layer with incoming packets.
hendrikvincent 0:05ccbd4f84f1 346 *
hendrikvincent 0:05ccbd4f84f1 347 * @param netif The lwip network interface structure for this slipif
hendrikvincent 0:05ccbd4f84f1 348 */
hendrikvincent 0:05ccbd4f84f1 349 void
hendrikvincent 0:05ccbd4f84f1 350 slipif_poll(struct netif *netif)
hendrikvincent 0:05ccbd4f84f1 351 {
hendrikvincent 0:05ccbd4f84f1 352 struct pbuf *p;
hendrikvincent 0:05ccbd4f84f1 353 struct slipif_priv *priv;
hendrikvincent 0:05ccbd4f84f1 354
hendrikvincent 0:05ccbd4f84f1 355 LWIP_ASSERT("netif != NULL", (netif != NULL));
hendrikvincent 0:05ccbd4f84f1 356 LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
hendrikvincent 0:05ccbd4f84f1 357
hendrikvincent 0:05ccbd4f84f1 358 priv = netif->state;
hendrikvincent 0:05ccbd4f84f1 359
hendrikvincent 0:05ccbd4f84f1 360 while ((p = slipif_input(netif, SLIP_DONTBLOCK)) != NULL) {
hendrikvincent 0:05ccbd4f84f1 361 if (netif->input(p, netif) != ERR_OK) {
hendrikvincent 0:05ccbd4f84f1 362 pbuf_free(p);
hendrikvincent 0:05ccbd4f84f1 363 }
hendrikvincent 0:05ccbd4f84f1 364 }
hendrikvincent 0:05ccbd4f84f1 365 }
hendrikvincent 0:05ccbd4f84f1 366
hendrikvincent 0:05ccbd4f84f1 367 #endif /* LWIP_HAVE_SLIPIF */