Eduardo Pellini / F7_Ethernet_Pellini

Ethernet for Nucleo and Disco board STM32F746 works with gcc and arm. IAC is untested

Fork of F7_Ethernet by Dieter Graef

lwip/netif/slipif.c@0:d26c1b55cfca, 2016-06-19 (annotated)

Committer:
DieterGraef
Date:
Sun Jun 19 16:23:40 2016 +0000
Revision:
0:d26c1b55cfca
Ethernet Library for Nucleo stm32f746ZG and Disco stm32f746NG  works under arm and gcc environment

Who changed what in which revision?

UserRevisionLine numberNew contents of line
DieterGraef 0:d26c1b55cfca 1 /**
DieterGraef 0:d26c1b55cfca 2 * @file
DieterGraef 0:d26c1b55cfca 3 * SLIP Interface
DieterGraef 0:d26c1b55cfca 4 *
DieterGraef 0:d26c1b55cfca 5 */
DieterGraef 0:d26c1b55cfca 6
DieterGraef 0:d26c1b55cfca 7 /*
DieterGraef 0:d26c1b55cfca 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
DieterGraef 0:d26c1b55cfca 9 * All rights reserved.
DieterGraef 0:d26c1b55cfca 10 *
DieterGraef 0:d26c1b55cfca 11 * Redistribution and use in source and binary forms, with or without
DieterGraef 0:d26c1b55cfca 12 * modification, are permitted provided that the following conditions
DieterGraef 0:d26c1b55cfca 13 * are met:
DieterGraef 0:d26c1b55cfca 14 * 1. Redistributions of source code must retain the above copyright
DieterGraef 0:d26c1b55cfca 15 * notice, this list of conditions and the following disclaimer.
DieterGraef 0:d26c1b55cfca 16 * 2. Redistributions in binary form must reproduce the above copyright
DieterGraef 0:d26c1b55cfca 17 * notice, this list of conditions and the following disclaimer in the
DieterGraef 0:d26c1b55cfca 18 * documentation and/or other materials provided with the distribution.
DieterGraef 0:d26c1b55cfca 19 * 3. Neither the name of the Institute nor the names of its contributors
DieterGraef 0:d26c1b55cfca 20 * may be used to endorse or promote products derived from this software
DieterGraef 0:d26c1b55cfca 21 * without specific prior written permission.
DieterGraef 0:d26c1b55cfca 22 *
DieterGraef 0:d26c1b55cfca 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
DieterGraef 0:d26c1b55cfca 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
DieterGraef 0:d26c1b55cfca 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
DieterGraef 0:d26c1b55cfca 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
DieterGraef 0:d26c1b55cfca 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DieterGraef 0:d26c1b55cfca 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
DieterGraef 0:d26c1b55cfca 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
DieterGraef 0:d26c1b55cfca 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
DieterGraef 0:d26c1b55cfca 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
DieterGraef 0:d26c1b55cfca 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
DieterGraef 0:d26c1b55cfca 33 * SUCH DAMAGE.
DieterGraef 0:d26c1b55cfca 34 *
DieterGraef 0:d26c1b55cfca 35 * This file is built upon the file: src/arch/rtxc/netif/sioslip.c
DieterGraef 0:d26c1b55cfca 36 *
DieterGraef 0:d26c1b55cfca 37 * Author: Magnus Ivarsson <magnus.ivarsson(at)volvo.com>
DieterGraef 0:d26c1b55cfca 38 * Simon Goldschmidt
DieterGraef 0:d26c1b55cfca 39 *
DieterGraef 0:d26c1b55cfca 40 * Usage: This netif can be used in three ways:
DieterGraef 0:d26c1b55cfca 41 * 1) For NO_SYS==0, an RX thread can be used which blocks on sio_read()
DieterGraef 0:d26c1b55cfca 42 * until data is received.
DieterGraef 0:d26c1b55cfca 43 * 2) In your main loop, call slipif_poll() to check for new RX bytes,
DieterGraef 0:d26c1b55cfca 44 * completed packets are fed into netif->input().
DieterGraef 0:d26c1b55cfca 45 * 3) Call slipif_received_byte[s]() from your serial RX ISR and
DieterGraef 0:d26c1b55cfca 46 * slipif_process_rxqueue() from your main loop. ISR level decodes
DieterGraef 0:d26c1b55cfca 47 * packets and puts completed packets on a queue which is fed into
DieterGraef 0:d26c1b55cfca 48 * the stack from the main loop (needs SYS_LIGHTWEIGHT_PROT for
DieterGraef 0:d26c1b55cfca 49 * pbuf_alloc to work on ISR level!).
DieterGraef 0:d26c1b55cfca 50 *
DieterGraef 0:d26c1b55cfca 51 */
DieterGraef 0:d26c1b55cfca 52
DieterGraef 0:d26c1b55cfca 53 /*
DieterGraef 0:d26c1b55cfca 54 * This is an arch independent SLIP netif. The specific serial hooks must be
DieterGraef 0:d26c1b55cfca 55 * provided by another file. They are sio_open, sio_read/sio_tryread and sio_send
DieterGraef 0:d26c1b55cfca 56 */
DieterGraef 0:d26c1b55cfca 57
DieterGraef 0:d26c1b55cfca 58 #include "netif/slipif.h"
DieterGraef 0:d26c1b55cfca 59 #include "lwip/opt.h"
DieterGraef 0:d26c1b55cfca 60
DieterGraef 0:d26c1b55cfca 61 #if LWIP_HAVE_SLIPIF
DieterGraef 0:d26c1b55cfca 62
DieterGraef 0:d26c1b55cfca 63 #include "lwip/def.h"
DieterGraef 0:d26c1b55cfca 64 #include "lwip/pbuf.h"
DieterGraef 0:d26c1b55cfca 65 #include "lwip/stats.h"
DieterGraef 0:d26c1b55cfca 66 #include "lwip/snmp.h"
DieterGraef 0:d26c1b55cfca 67 #include "lwip/sio.h"
DieterGraef 0:d26c1b55cfca 68 #include "lwip/sys.h"
DieterGraef 0:d26c1b55cfca 69
DieterGraef 0:d26c1b55cfca 70 #define SLIP_END 0xC0 /* 0300: start and end of every packet */
DieterGraef 0:d26c1b55cfca 71 #define SLIP_ESC 0xDB /* 0333: escape start (one byte escaped data follows) */
DieterGraef 0:d26c1b55cfca 72 #define SLIP_ESC_END 0xDC /* 0334: following escape: original byte is 0xC0 (END) */
DieterGraef 0:d26c1b55cfca 73 #define SLIP_ESC_ESC 0xDD /* 0335: following escape: original byte is 0xDB (ESC) */
DieterGraef 0:d26c1b55cfca 74
DieterGraef 0:d26c1b55cfca 75 /** Maximum packet size that is received by this netif */
DieterGraef 0:d26c1b55cfca 76 #ifndef SLIP_MAX_SIZE
DieterGraef 0:d26c1b55cfca 77 #define SLIP_MAX_SIZE 1500
DieterGraef 0:d26c1b55cfca 78 #endif
DieterGraef 0:d26c1b55cfca 79
DieterGraef 0:d26c1b55cfca 80 /** Define this to the interface speed for SNMP
DieterGraef 0:d26c1b55cfca 81 * (sio_fd is the sio_fd_t returned by sio_open).
DieterGraef 0:d26c1b55cfca 82 * The default value of zero means 'unknown'.
DieterGraef 0:d26c1b55cfca 83 */
DieterGraef 0:d26c1b55cfca 84 #ifndef SLIP_SIO_SPEED
DieterGraef 0:d26c1b55cfca 85 #define SLIP_SIO_SPEED(sio_fd) 0
DieterGraef 0:d26c1b55cfca 86 #endif
DieterGraef 0:d26c1b55cfca 87
DieterGraef 0:d26c1b55cfca 88 enum slipif_recv_state {
DieterGraef 0:d26c1b55cfca 89 SLIP_RECV_NORMAL,
DieterGraef 0:d26c1b55cfca 90 SLIP_RECV_ESCAPE,
DieterGraef 0:d26c1b55cfca 91 };
DieterGraef 0:d26c1b55cfca 92
DieterGraef 0:d26c1b55cfca 93 struct slipif_priv {
DieterGraef 0:d26c1b55cfca 94 sio_fd_t sd;
DieterGraef 0:d26c1b55cfca 95 /* q is the whole pbuf chain for a packet, p is the current pbuf in the chain */
DieterGraef 0:d26c1b55cfca 96 struct pbuf *p, *q;
DieterGraef 0:d26c1b55cfca 97 u8_t state;
DieterGraef 0:d26c1b55cfca 98 u16_t i, recved;
DieterGraef 0:d26c1b55cfca 99 #if SLIP_RX_FROM_ISR
DieterGraef 0:d26c1b55cfca 100 struct pbuf *rxpackets;
DieterGraef 0:d26c1b55cfca 101 #endif
DieterGraef 0:d26c1b55cfca 102 };
DieterGraef 0:d26c1b55cfca 103
DieterGraef 0:d26c1b55cfca 104 /**
DieterGraef 0:d26c1b55cfca 105 * Send a pbuf doing the necessary SLIP encapsulation
DieterGraef 0:d26c1b55cfca 106 *
DieterGraef 0:d26c1b55cfca 107 * Uses the serial layer's sio_send()
DieterGraef 0:d26c1b55cfca 108 *
DieterGraef 0:d26c1b55cfca 109 * @param netif the lwip network interface structure for this slipif
DieterGraef 0:d26c1b55cfca 110 * @param p the pbuf chaing packet to send
DieterGraef 0:d26c1b55cfca 111 * @param ipaddr the ip address to send the packet to (not used for slipif)
DieterGraef 0:d26c1b55cfca 112 * @return always returns ERR_OK since the serial layer does not provide return values
DieterGraef 0:d26c1b55cfca 113 */
DieterGraef 0:d26c1b55cfca 114 err_t
DieterGraef 0:d26c1b55cfca 115 slipif_output(struct netif *netif, struct pbuf *p, ip_addr_t *ipaddr)
DieterGraef 0:d26c1b55cfca 116 {
DieterGraef 0:d26c1b55cfca 117 struct slipif_priv *priv;
DieterGraef 0:d26c1b55cfca 118 struct pbuf *q;
DieterGraef 0:d26c1b55cfca 119 u16_t i;
DieterGraef 0:d26c1b55cfca 120 u8_t c;
DieterGraef 0:d26c1b55cfca 121
DieterGraef 0:d26c1b55cfca 122 LWIP_ASSERT("netif != NULL", (netif != NULL));
DieterGraef 0:d26c1b55cfca 123 LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
DieterGraef 0:d26c1b55cfca 124 LWIP_ASSERT("p != NULL", (p != NULL));
DieterGraef 0:d26c1b55cfca 125
DieterGraef 0:d26c1b55cfca 126 LWIP_UNUSED_ARG(ipaddr);
DieterGraef 0:d26c1b55cfca 127
DieterGraef 0:d26c1b55cfca 128 LWIP_DEBUGF(SLIP_DEBUG, ("slipif_output(%"U16_F"): sending %"U16_F" bytes\n", (u16_t)netif->num, p->tot_len));
DieterGraef 0:d26c1b55cfca 129 priv = netif->state;
DieterGraef 0:d26c1b55cfca 130
DieterGraef 0:d26c1b55cfca 131 /* Send pbuf out on the serial I/O device. */
DieterGraef 0:d26c1b55cfca 132 /* Start with packet delimiter. */
DieterGraef 0:d26c1b55cfca 133 sio_send(SLIP_END, priv->sd);
DieterGraef 0:d26c1b55cfca 134
DieterGraef 0:d26c1b55cfca 135 for (q = p; q != NULL; q = q->next) {
DieterGraef 0:d26c1b55cfca 136 for (i = 0; i < q->len; i++) {
DieterGraef 0:d26c1b55cfca 137 c = ((u8_t *)q->payload)[i];
DieterGraef 0:d26c1b55cfca 138 switch (c) {
DieterGraef 0:d26c1b55cfca 139 case SLIP_END:
DieterGraef 0:d26c1b55cfca 140 /* need to escape this byte (0xC0 -> 0xDB, 0xDC) */
DieterGraef 0:d26c1b55cfca 141 sio_send(SLIP_ESC, priv->sd);
DieterGraef 0:d26c1b55cfca 142 sio_send(SLIP_ESC_END, priv->sd);
DieterGraef 0:d26c1b55cfca 143 break;
DieterGraef 0:d26c1b55cfca 144 case SLIP_ESC:
DieterGraef 0:d26c1b55cfca 145 /* need to escape this byte (0xDB -> 0xDB, 0xDD) */
DieterGraef 0:d26c1b55cfca 146 sio_send(SLIP_ESC, priv->sd);
DieterGraef 0:d26c1b55cfca 147 sio_send(SLIP_ESC_ESC, priv->sd);
DieterGraef 0:d26c1b55cfca 148 break;
DieterGraef 0:d26c1b55cfca 149 default:
DieterGraef 0:d26c1b55cfca 150 /* normal byte - no need for escaping */
DieterGraef 0:d26c1b55cfca 151 sio_send(c, priv->sd);
DieterGraef 0:d26c1b55cfca 152 break;
DieterGraef 0:d26c1b55cfca 153 }
DieterGraef 0:d26c1b55cfca 154 }
DieterGraef 0:d26c1b55cfca 155 }
DieterGraef 0:d26c1b55cfca 156 /* End with packet delimiter. */
DieterGraef 0:d26c1b55cfca 157 sio_send(SLIP_END, priv->sd);
DieterGraef 0:d26c1b55cfca 158 return ERR_OK;
DieterGraef 0:d26c1b55cfca 159 }
DieterGraef 0:d26c1b55cfca 160
DieterGraef 0:d26c1b55cfca 161 /**
DieterGraef 0:d26c1b55cfca 162 * Handle the incoming SLIP stream character by character
DieterGraef 0:d26c1b55cfca 163 *
DieterGraef 0:d26c1b55cfca 164 * @param netif the lwip network interface structure for this slipif
DieterGraef 0:d26c1b55cfca 165 * @param c received character (multiple calls to this function will
DieterGraef 0:d26c1b55cfca 166 * return a complete packet, NULL is returned before - used for polling)
DieterGraef 0:d26c1b55cfca 167 * @return The IP packet when SLIP_END is received
DieterGraef 0:d26c1b55cfca 168 */
DieterGraef 0:d26c1b55cfca 169 static struct pbuf*
DieterGraef 0:d26c1b55cfca 170 slipif_rxbyte(struct netif *netif, u8_t c)
DieterGraef 0:d26c1b55cfca 171 {
DieterGraef 0:d26c1b55cfca 172 struct slipif_priv *priv;
DieterGraef 0:d26c1b55cfca 173 struct pbuf *t;
DieterGraef 0:d26c1b55cfca 174
DieterGraef 0:d26c1b55cfca 175 LWIP_ASSERT("netif != NULL", (netif != NULL));
DieterGraef 0:d26c1b55cfca 176 LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
DieterGraef 0:d26c1b55cfca 177
DieterGraef 0:d26c1b55cfca 178 priv = netif->state;
DieterGraef 0:d26c1b55cfca 179
DieterGraef 0:d26c1b55cfca 180 switch (priv->state) {
DieterGraef 0:d26c1b55cfca 181 case SLIP_RECV_NORMAL:
DieterGraef 0:d26c1b55cfca 182 switch (c) {
DieterGraef 0:d26c1b55cfca 183 case SLIP_END:
DieterGraef 0:d26c1b55cfca 184 if (priv->recved > 0) {
DieterGraef 0:d26c1b55cfca 185 /* Received whole packet. */
DieterGraef 0:d26c1b55cfca 186 /* Trim the pbuf to the size of the received packet. */
DieterGraef 0:d26c1b55cfca 187 pbuf_realloc(priv->q, priv->recved);
DieterGraef 0:d26c1b55cfca 188
DieterGraef 0:d26c1b55cfca 189 LINK_STATS_INC(link.recv);
DieterGraef 0:d26c1b55cfca 190
DieterGraef 0:d26c1b55cfca 191 LWIP_DEBUGF(SLIP_DEBUG, ("slipif: Got packet (%"U16_F" bytes)\n", priv->recved));
DieterGraef 0:d26c1b55cfca 192 t = priv->q;
DieterGraef 0:d26c1b55cfca 193 priv->p = priv->q = NULL;
DieterGraef 0:d26c1b55cfca 194 priv->i = priv->recved = 0;
DieterGraef 0:d26c1b55cfca 195 return t;
DieterGraef 0:d26c1b55cfca 196 }
DieterGraef 0:d26c1b55cfca 197 return NULL;
DieterGraef 0:d26c1b55cfca 198 case SLIP_ESC:
DieterGraef 0:d26c1b55cfca 199 priv->state = SLIP_RECV_ESCAPE;
DieterGraef 0:d26c1b55cfca 200 return NULL;
DieterGraef 0:d26c1b55cfca 201 } /* end switch (c) */
DieterGraef 0:d26c1b55cfca 202 break;
DieterGraef 0:d26c1b55cfca 203 case SLIP_RECV_ESCAPE:
DieterGraef 0:d26c1b55cfca 204 /* un-escape END or ESC bytes, leave other bytes
DieterGraef 0:d26c1b55cfca 205 (although that would be a protocol error) */
DieterGraef 0:d26c1b55cfca 206 switch (c) {
DieterGraef 0:d26c1b55cfca 207 case SLIP_ESC_END:
DieterGraef 0:d26c1b55cfca 208 c = SLIP_END;
DieterGraef 0:d26c1b55cfca 209 break;
DieterGraef 0:d26c1b55cfca 210 case SLIP_ESC_ESC:
DieterGraef 0:d26c1b55cfca 211 c = SLIP_ESC;
DieterGraef 0:d26c1b55cfca 212 break;
DieterGraef 0:d26c1b55cfca 213 }
DieterGraef 0:d26c1b55cfca 214 priv->state = SLIP_RECV_NORMAL;
DieterGraef 0:d26c1b55cfca 215 break;
DieterGraef 0:d26c1b55cfca 216 } /* end switch (priv->state) */
DieterGraef 0:d26c1b55cfca 217
DieterGraef 0:d26c1b55cfca 218 /* byte received, packet not yet completely received */
DieterGraef 0:d26c1b55cfca 219 if (priv->p == NULL) {
DieterGraef 0:d26c1b55cfca 220 /* allocate a new pbuf */
DieterGraef 0:d26c1b55cfca 221 LWIP_DEBUGF(SLIP_DEBUG, ("slipif_input: alloc\n"));
DieterGraef 0:d26c1b55cfca 222 priv->p = pbuf_alloc(PBUF_LINK, (PBUF_POOL_BUFSIZE - PBUF_LINK_HLEN), PBUF_POOL);
DieterGraef 0:d26c1b55cfca 223
DieterGraef 0:d26c1b55cfca 224 if (priv->p == NULL) {
DieterGraef 0:d26c1b55cfca 225 LINK_STATS_INC(link.drop);
DieterGraef 0:d26c1b55cfca 226 LWIP_DEBUGF(SLIP_DEBUG, ("slipif_input: no new pbuf! (DROP)\n"));
DieterGraef 0:d26c1b55cfca 227 /* don't process any further since we got no pbuf to receive to */
DieterGraef 0:d26c1b55cfca 228 return NULL;
DieterGraef 0:d26c1b55cfca 229 }
DieterGraef 0:d26c1b55cfca 230
DieterGraef 0:d26c1b55cfca 231 if (priv->q != NULL) {
DieterGraef 0:d26c1b55cfca 232 /* 'chain' the pbuf to the existing chain */
DieterGraef 0:d26c1b55cfca 233 pbuf_cat(priv->q, priv->p);
DieterGraef 0:d26c1b55cfca 234 } else {
DieterGraef 0:d26c1b55cfca 235 /* p is the first pbuf in the chain */
DieterGraef 0:d26c1b55cfca 236 priv->q = priv->p;
DieterGraef 0:d26c1b55cfca 237 }
DieterGraef 0:d26c1b55cfca 238 }
DieterGraef 0:d26c1b55cfca 239
DieterGraef 0:d26c1b55cfca 240 /* this automatically drops bytes if > SLIP_MAX_SIZE */
DieterGraef 0:d26c1b55cfca 241 if ((priv->p != NULL) && (priv->recved <= SLIP_MAX_SIZE)) {
DieterGraef 0:d26c1b55cfca 242 ((u8_t *)priv->p->payload)[priv->i] = c;
DieterGraef 0:d26c1b55cfca 243 priv->recved++;
DieterGraef 0:d26c1b55cfca 244 priv->i++;
DieterGraef 0:d26c1b55cfca 245 if (priv->i >= priv->p->len) {
DieterGraef 0:d26c1b55cfca 246 /* on to the next pbuf */
DieterGraef 0:d26c1b55cfca 247 priv->i = 0;
DieterGraef 0:d26c1b55cfca 248 if (priv->p->next != NULL && priv->p->next->len > 0) {
DieterGraef 0:d26c1b55cfca 249 /* p is a chain, on to the next in the chain */
DieterGraef 0:d26c1b55cfca 250 priv->p = priv->p->next;
DieterGraef 0:d26c1b55cfca 251 } else {
DieterGraef 0:d26c1b55cfca 252 /* p is a single pbuf, set it to NULL so next time a new
DieterGraef 0:d26c1b55cfca 253 * pbuf is allocated */
DieterGraef 0:d26c1b55cfca 254 priv->p = NULL;
DieterGraef 0:d26c1b55cfca 255 }
DieterGraef 0:d26c1b55cfca 256 }
DieterGraef 0:d26c1b55cfca 257 }
DieterGraef 0:d26c1b55cfca 258 return NULL;
DieterGraef 0:d26c1b55cfca 259 }
DieterGraef 0:d26c1b55cfca 260
DieterGraef 0:d26c1b55cfca 261 /** Like slipif_rxbyte, but passes completed packets to netif->input
DieterGraef 0:d26c1b55cfca 262 *
DieterGraef 0:d26c1b55cfca 263 * @param netif The lwip network interface structure for this slipif
DieterGraef 0:d26c1b55cfca 264 * @param data received character
DieterGraef 0:d26c1b55cfca 265 */
DieterGraef 0:d26c1b55cfca 266 static void
DieterGraef 0:d26c1b55cfca 267 slipif_rxbyte_input(struct netif *netif, u8_t c)
DieterGraef 0:d26c1b55cfca 268 {
DieterGraef 0:d26c1b55cfca 269 struct pbuf *p;
DieterGraef 0:d26c1b55cfca 270 p = slipif_rxbyte(netif, c);
DieterGraef 0:d26c1b55cfca 271 if (p != NULL) {
DieterGraef 0:d26c1b55cfca 272 if (netif->input(p, netif) != ERR_OK) {
DieterGraef 0:d26c1b55cfca 273 pbuf_free(p);
DieterGraef 0:d26c1b55cfca 274 }
DieterGraef 0:d26c1b55cfca 275 }
DieterGraef 0:d26c1b55cfca 276 }
DieterGraef 0:d26c1b55cfca 277
DieterGraef 0:d26c1b55cfca 278 #if SLIP_USE_RX_THREAD
DieterGraef 0:d26c1b55cfca 279 /**
DieterGraef 0:d26c1b55cfca 280 * The SLIP input thread.
DieterGraef 0:d26c1b55cfca 281 *
DieterGraef 0:d26c1b55cfca 282 * Feed the IP layer with incoming packets
DieterGraef 0:d26c1b55cfca 283 *
DieterGraef 0:d26c1b55cfca 284 * @param nf the lwip network interface structure for this slipif
DieterGraef 0:d26c1b55cfca 285 */
DieterGraef 0:d26c1b55cfca 286 static void
DieterGraef 0:d26c1b55cfca 287 slipif_loop_thread(void *nf)
DieterGraef 0:d26c1b55cfca 288 {
DieterGraef 0:d26c1b55cfca 289 u8_t c;
DieterGraef 0:d26c1b55cfca 290 struct netif *netif = (struct netif *)nf;
DieterGraef 0:d26c1b55cfca 291 struct slipif_priv *priv = (struct slipif_priv *)netif->state;
DieterGraef 0:d26c1b55cfca 292
DieterGraef 0:d26c1b55cfca 293 while (1) {
DieterGraef 0:d26c1b55cfca 294 if (sio_read(priv->sd, &c, 1) > 0) {
DieterGraef 0:d26c1b55cfca 295 slipif_rxbyte_input(netif, c);
DieterGraef 0:d26c1b55cfca 296 }
DieterGraef 0:d26c1b55cfca 297 }
DieterGraef 0:d26c1b55cfca 298 }
DieterGraef 0:d26c1b55cfca 299 #endif /* SLIP_USE_RX_THREAD */
DieterGraef 0:d26c1b55cfca 300
DieterGraef 0:d26c1b55cfca 301 /**
DieterGraef 0:d26c1b55cfca 302 * SLIP netif initialization
DieterGraef 0:d26c1b55cfca 303 *
DieterGraef 0:d26c1b55cfca 304 * Call the arch specific sio_open and remember
DieterGraef 0:d26c1b55cfca 305 * the opened device in the state field of the netif.
DieterGraef 0:d26c1b55cfca 306 *
DieterGraef 0:d26c1b55cfca 307 * @param netif the lwip network interface structure for this slipif
DieterGraef 0:d26c1b55cfca 308 * @return ERR_OK if serial line could be opened,
DieterGraef 0:d26c1b55cfca 309 * ERR_MEM if no memory could be allocated,
DieterGraef 0:d26c1b55cfca 310 * ERR_IF is serial line couldn't be opened
DieterGraef 0:d26c1b55cfca 311 *
DieterGraef 0:d26c1b55cfca 312 * @note netif->num must contain the number of the serial port to open
DieterGraef 0:d26c1b55cfca 313 * (0 by default). If netif->state is != NULL, it is interpreted as an
DieterGraef 0:d26c1b55cfca 314 * u8_t pointer pointing to the serial port number instead of netif->num.
DieterGraef 0:d26c1b55cfca 315 *
DieterGraef 0:d26c1b55cfca 316 */
DieterGraef 0:d26c1b55cfca 317 err_t
DieterGraef 0:d26c1b55cfca 318 slipif_init(struct netif *netif)
DieterGraef 0:d26c1b55cfca 319 {
DieterGraef 0:d26c1b55cfca 320 struct slipif_priv *priv;
DieterGraef 0:d26c1b55cfca 321 u8_t sio_num;
DieterGraef 0:d26c1b55cfca 322
DieterGraef 0:d26c1b55cfca 323 LWIP_DEBUGF(SLIP_DEBUG, ("slipif_init: netif->num=%"U16_F"\n", (u16_t)netif->num));
DieterGraef 0:d26c1b55cfca 324
DieterGraef 0:d26c1b55cfca 325 /* Allocate private data */
DieterGraef 0:d26c1b55cfca 326 priv = (struct slipif_priv *)mem_malloc(sizeof(struct slipif_priv));
DieterGraef 0:d26c1b55cfca 327 if (!priv) {
DieterGraef 0:d26c1b55cfca 328 return ERR_MEM;
DieterGraef 0:d26c1b55cfca 329 }
DieterGraef 0:d26c1b55cfca 330
DieterGraef 0:d26c1b55cfca 331 netif->name[0] = 's';
DieterGraef 0:d26c1b55cfca 332 netif->name[1] = 'l';
DieterGraef 0:d26c1b55cfca 333 netif->output = slipif_output;
DieterGraef 0:d26c1b55cfca 334 netif->mtu = SLIP_MAX_SIZE;
DieterGraef 0:d26c1b55cfca 335 netif->flags |= NETIF_FLAG_POINTTOPOINT;
DieterGraef 0:d26c1b55cfca 336
DieterGraef 0:d26c1b55cfca 337 /* netif->state or netif->num contain the port number */
DieterGraef 0:d26c1b55cfca 338 if (netif->state != NULL) {
DieterGraef 0:d26c1b55cfca 339 sio_num = *(u8_t*)netif->state;
DieterGraef 0:d26c1b55cfca 340 } else {
DieterGraef 0:d26c1b55cfca 341 sio_num = netif->num;
DieterGraef 0:d26c1b55cfca 342 }
DieterGraef 0:d26c1b55cfca 343 /* Try to open the serial port. */
DieterGraef 0:d26c1b55cfca 344 priv->sd = sio_open(sio_num);
DieterGraef 0:d26c1b55cfca 345 if (!priv->sd) {
DieterGraef 0:d26c1b55cfca 346 /* Opening the serial port failed. */
DieterGraef 0:d26c1b55cfca 347 mem_free(priv);
DieterGraef 0:d26c1b55cfca 348 return ERR_IF;
DieterGraef 0:d26c1b55cfca 349 }
DieterGraef 0:d26c1b55cfca 350
DieterGraef 0:d26c1b55cfca 351 /* Initialize private data */
DieterGraef 0:d26c1b55cfca 352 priv->p = NULL;
DieterGraef 0:d26c1b55cfca 353 priv->q = NULL;
DieterGraef 0:d26c1b55cfca 354 priv->state = SLIP_RECV_NORMAL;
DieterGraef 0:d26c1b55cfca 355 priv->i = 0;
DieterGraef 0:d26c1b55cfca 356 priv->recved = 0;
DieterGraef 0:d26c1b55cfca 357 #if SLIP_RX_FROM_ISR
DieterGraef 0:d26c1b55cfca 358 priv->rxpackets = NULL;
DieterGraef 0:d26c1b55cfca 359 #endif
DieterGraef 0:d26c1b55cfca 360
DieterGraef 0:d26c1b55cfca 361 netif->state = priv;
DieterGraef 0:d26c1b55cfca 362
DieterGraef 0:d26c1b55cfca 363 /* initialize the snmp variables and counters inside the struct netif */
DieterGraef 0:d26c1b55cfca 364 NETIF_INIT_SNMP(netif, snmp_ifType_slip, SLIP_SIO_SPEED(priv->sd));
DieterGraef 0:d26c1b55cfca 365
DieterGraef 0:d26c1b55cfca 366 #if SLIP_USE_RX_THREAD
DieterGraef 0:d26c1b55cfca 367 /* Create a thread to poll the serial line. */
DieterGraef 0:d26c1b55cfca 368 sys_thread_new(SLIPIF_THREAD_NAME, slipif_loop_thread, netif,
DieterGraef 0:d26c1b55cfca 369 SLIPIF_THREAD_STACKSIZE, SLIPIF_THREAD_PRIO);
DieterGraef 0:d26c1b55cfca 370 #endif /* SLIP_USE_RX_THREAD */
DieterGraef 0:d26c1b55cfca 371 return ERR_OK;
DieterGraef 0:d26c1b55cfca 372 }
DieterGraef 0:d26c1b55cfca 373
DieterGraef 0:d26c1b55cfca 374 /**
DieterGraef 0:d26c1b55cfca 375 * Polls the serial device and feeds the IP layer with incoming packets.
DieterGraef 0:d26c1b55cfca 376 *
DieterGraef 0:d26c1b55cfca 377 * @param netif The lwip network interface structure for this slipif
DieterGraef 0:d26c1b55cfca 378 */
DieterGraef 0:d26c1b55cfca 379 void
DieterGraef 0:d26c1b55cfca 380 slipif_poll(struct netif *netif)
DieterGraef 0:d26c1b55cfca 381 {
DieterGraef 0:d26c1b55cfca 382 u8_t c;
DieterGraef 0:d26c1b55cfca 383 struct slipif_priv *priv;
DieterGraef 0:d26c1b55cfca 384
DieterGraef 0:d26c1b55cfca 385 LWIP_ASSERT("netif != NULL", (netif != NULL));
DieterGraef 0:d26c1b55cfca 386 LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
DieterGraef 0:d26c1b55cfca 387
DieterGraef 0:d26c1b55cfca 388 priv = (struct slipif_priv *)netif->state;
DieterGraef 0:d26c1b55cfca 389
DieterGraef 0:d26c1b55cfca 390 while (sio_tryread(priv->sd, &c, 1) > 0) {
DieterGraef 0:d26c1b55cfca 391 slipif_rxbyte_input(netif, c);
DieterGraef 0:d26c1b55cfca 392 }
DieterGraef 0:d26c1b55cfca 393 }
DieterGraef 0:d26c1b55cfca 394
DieterGraef 0:d26c1b55cfca 395 #if SLIP_RX_FROM_ISR
DieterGraef 0:d26c1b55cfca 396 /**
DieterGraef 0:d26c1b55cfca 397 * Feeds the IP layer with incoming packets that were receive
DieterGraef 0:d26c1b55cfca 398 *
DieterGraef 0:d26c1b55cfca 399 * @param netif The lwip network interface structure for this slipif
DieterGraef 0:d26c1b55cfca 400 */
DieterGraef 0:d26c1b55cfca 401 void
DieterGraef 0:d26c1b55cfca 402 slipif_process_rxqueue(struct netif *netif)
DieterGraef 0:d26c1b55cfca 403 {
DieterGraef 0:d26c1b55cfca 404 struct slipif_priv *priv;
DieterGraef 0:d26c1b55cfca 405 SYS_ARCH_DECL_PROTECT(old_level);
DieterGraef 0:d26c1b55cfca 406
DieterGraef 0:d26c1b55cfca 407 LWIP_ASSERT("netif != NULL", (netif != NULL));
DieterGraef 0:d26c1b55cfca 408 LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
DieterGraef 0:d26c1b55cfca 409
DieterGraef 0:d26c1b55cfca 410 priv = (struct slipif_priv *)netif->state;
DieterGraef 0:d26c1b55cfca 411
DieterGraef 0:d26c1b55cfca 412 SYS_ARCH_PROTECT(old_level);
DieterGraef 0:d26c1b55cfca 413 while (priv->rxpackets != NULL) {
DieterGraef 0:d26c1b55cfca 414 struct pbuf *p = priv->rxpackets;
DieterGraef 0:d26c1b55cfca 415 #if SLIP_RX_QUEUE
DieterGraef 0:d26c1b55cfca 416 /* dequeue packet */
DieterGraef 0:d26c1b55cfca 417 struct pbuf *q = p;
DieterGraef 0:d26c1b55cfca 418 while ((q->len != q->tot_len) && (q->next != NULL)) {
DieterGraef 0:d26c1b55cfca 419 q = q->next;
DieterGraef 0:d26c1b55cfca 420 }
DieterGraef 0:d26c1b55cfca 421 priv->rxpackets = q->next;
DieterGraef 0:d26c1b55cfca 422 q->next = NULL;
DieterGraef 0:d26c1b55cfca 423 #else /* SLIP_RX_QUEUE */
DieterGraef 0:d26c1b55cfca 424 priv->rxpackets = NULL;
DieterGraef 0:d26c1b55cfca 425 #endif /* SLIP_RX_QUEUE */
DieterGraef 0:d26c1b55cfca 426 SYS_ARCH_UNPROTECT(old_level);
DieterGraef 0:d26c1b55cfca 427 if (netif->input(p, netif) != ERR_OK) {
DieterGraef 0:d26c1b55cfca 428 pbuf_free(p);
DieterGraef 0:d26c1b55cfca 429 }
DieterGraef 0:d26c1b55cfca 430 SYS_ARCH_PROTECT(old_level);
DieterGraef 0:d26c1b55cfca 431 }
DieterGraef 0:d26c1b55cfca 432 }
DieterGraef 0:d26c1b55cfca 433
DieterGraef 0:d26c1b55cfca 434 /** Like slipif_rxbyte, but queues completed packets.
DieterGraef 0:d26c1b55cfca 435 *
DieterGraef 0:d26c1b55cfca 436 * @param netif The lwip network interface structure for this slipif
DieterGraef 0:d26c1b55cfca 437 * @param data Received serial byte
DieterGraef 0:d26c1b55cfca 438 */
DieterGraef 0:d26c1b55cfca 439 static void
DieterGraef 0:d26c1b55cfca 440 slipif_rxbyte_enqueue(struct netif *netif, u8_t data)
DieterGraef 0:d26c1b55cfca 441 {
DieterGraef 0:d26c1b55cfca 442 struct pbuf *p;
DieterGraef 0:d26c1b55cfca 443 struct slipif_priv *priv = (struct slipif_priv *)netif->state;
DieterGraef 0:d26c1b55cfca 444 SYS_ARCH_DECL_PROTECT(old_level);
DieterGraef 0:d26c1b55cfca 445
DieterGraef 0:d26c1b55cfca 446 p = slipif_rxbyte(netif, data);
DieterGraef 0:d26c1b55cfca 447 if (p != NULL) {
DieterGraef 0:d26c1b55cfca 448 SYS_ARCH_PROTECT(old_level);
DieterGraef 0:d26c1b55cfca 449 if (priv->rxpackets != NULL) {
DieterGraef 0:d26c1b55cfca 450 #if SLIP_RX_QUEUE
DieterGraef 0:d26c1b55cfca 451 /* queue multiple pbufs */
DieterGraef 0:d26c1b55cfca 452 struct pbuf *q = p;
DieterGraef 0:d26c1b55cfca 453 while(q->next != NULL) {
DieterGraef 0:d26c1b55cfca 454 q = q->next;
DieterGraef 0:d26c1b55cfca 455 }
DieterGraef 0:d26c1b55cfca 456 q->next = p;
DieterGraef 0:d26c1b55cfca 457 } else {
DieterGraef 0:d26c1b55cfca 458 #else /* SLIP_RX_QUEUE */
DieterGraef 0:d26c1b55cfca 459 pbuf_free(priv->rxpackets);
DieterGraef 0:d26c1b55cfca 460 }
DieterGraef 0:d26c1b55cfca 461 {
DieterGraef 0:d26c1b55cfca 462 #endif /* SLIP_RX_QUEUE */
DieterGraef 0:d26c1b55cfca 463 priv->rxpackets = p;
DieterGraef 0:d26c1b55cfca 464 }
DieterGraef 0:d26c1b55cfca 465 SYS_ARCH_UNPROTECT(old_level);
DieterGraef 0:d26c1b55cfca 466 }
DieterGraef 0:d26c1b55cfca 467 }
DieterGraef 0:d26c1b55cfca 468
DieterGraef 0:d26c1b55cfca 469 /**
DieterGraef 0:d26c1b55cfca 470 * Process a received byte, completed packets are put on a queue that is
DieterGraef 0:d26c1b55cfca 471 * fed into IP through slipif_process_rxqueue().
DieterGraef 0:d26c1b55cfca 472 *
DieterGraef 0:d26c1b55cfca 473 * This function can be called from ISR if SYS_LIGHTWEIGHT_PROT is enabled.
DieterGraef 0:d26c1b55cfca 474 *
DieterGraef 0:d26c1b55cfca 475 * @param netif The lwip network interface structure for this slipif
DieterGraef 0:d26c1b55cfca 476 * @param data received character
DieterGraef 0:d26c1b55cfca 477 */
DieterGraef 0:d26c1b55cfca 478 void
DieterGraef 0:d26c1b55cfca 479 slipif_received_byte(struct netif *netif, u8_t data)
DieterGraef 0:d26c1b55cfca 480 {
DieterGraef 0:d26c1b55cfca 481 LWIP_ASSERT("netif != NULL", (netif != NULL));
DieterGraef 0:d26c1b55cfca 482 LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
DieterGraef 0:d26c1b55cfca 483 slipif_rxbyte_enqueue(netif, data);
DieterGraef 0:d26c1b55cfca 484 }
DieterGraef 0:d26c1b55cfca 485
DieterGraef 0:d26c1b55cfca 486 /**
DieterGraef 0:d26c1b55cfca 487 * Process multiple received byte, completed packets are put on a queue that is
DieterGraef 0:d26c1b55cfca 488 * fed into IP through slipif_process_rxqueue().
DieterGraef 0:d26c1b55cfca 489 *
DieterGraef 0:d26c1b55cfca 490 * This function can be called from ISR if SYS_LIGHTWEIGHT_PROT is enabled.
DieterGraef 0:d26c1b55cfca 491 *
DieterGraef 0:d26c1b55cfca 492 * @param netif The lwip network interface structure for this slipif
DieterGraef 0:d26c1b55cfca 493 * @param data received character
DieterGraef 0:d26c1b55cfca 494 * @param len Number of received characters
DieterGraef 0:d26c1b55cfca 495 */
DieterGraef 0:d26c1b55cfca 496 void
DieterGraef 0:d26c1b55cfca 497 slipif_received_bytes(struct netif *netif, u8_t *data, u8_t len)
DieterGraef 0:d26c1b55cfca 498 {
DieterGraef 0:d26c1b55cfca 499 u8_t i;
DieterGraef 0:d26c1b55cfca 500 u8_t *rxdata = data;
DieterGraef 0:d26c1b55cfca 501 LWIP_ASSERT("netif != NULL", (netif != NULL));
DieterGraef 0:d26c1b55cfca 502 LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
DieterGraef 0:d26c1b55cfca 503
DieterGraef 0:d26c1b55cfca 504 for (i = 0; i < len; i++, rxdata++) {
DieterGraef 0:d26c1b55cfca 505 slipif_rxbyte_enqueue(netif, *rxdata);
DieterGraef 0:d26c1b55cfca 506 }
DieterGraef 0:d26c1b55cfca 507 }
DieterGraef 0:d26c1b55cfca 508 #endif /* SLIP_RX_FROM_ISR */
DieterGraef 0:d26c1b55cfca 509
DieterGraef 0:d26c1b55cfca 510 #endif /* LWIP_HAVE_SLIPIF */