mbed official / lwip

Official mbed lwIP library (version 1.4.0)

Dependents:   LwIPNetworking NetServicesMin EthernetInterface EthernetInterface_RSF ... more

Legacy Networking Libraries

This is an mbed 2 networking library. For mbed OS 5, lwip has been integrated with built-in networking interfaces. The networking libraries have been revised to better support additional network stacks and thread safety here.

This library is based on the code of lwIP v1.4.0

Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
All rights reserved. 

Redistribution and use in source and binary forms, with or without modification, 
are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.
3. The name of the author may not be used to endorse or promote products
   derived from this software without specific prior written permission. 

THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
OF SUCH DAMAGE.

netif/ethernetif.c@20:08f08bfc3f3d, 2016-03-14 (annotated)

Committer:
mbed_official
Date:
Mon Mar 14 16:15:36 2016 +0000
Revision:
20:08f08bfc3f3d
Parent:
0:51ac1d130fd4 
Synchronized with git revision fec574a5ed6db26aca1b13992ff271bf527d4a0d



Full URL: https://github.com/mbedmicro/mbed/commit/fec574a5ed6db26aca1b13992ff271bf527d4a0d/



Increased allocated netbufs to handle DTLS handshakes

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:51ac1d130fd4 1 /**
mbed_official 0:51ac1d130fd4 2 * @file
mbed_official 0:51ac1d130fd4 3 * Ethernet Interface Skeleton
mbed_official 0:51ac1d130fd4 4 *
mbed_official 0:51ac1d130fd4 5 */
mbed_official 0:51ac1d130fd4 6
mbed_official 0:51ac1d130fd4 7 /*
mbed_official 0:51ac1d130fd4 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
mbed_official 0:51ac1d130fd4 9 * All rights reserved.
mbed_official 0:51ac1d130fd4 10 *
mbed_official 0:51ac1d130fd4 11 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 0:51ac1d130fd4 12 * are permitted provided that the following conditions are met:
mbed_official 0:51ac1d130fd4 13 *
mbed_official 0:51ac1d130fd4 14 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 0:51ac1d130fd4 15 * this list of conditions and the following disclaimer.
mbed_official 0:51ac1d130fd4 16 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 0:51ac1d130fd4 17 * this list of conditions and the following disclaimer in the documentation
mbed_official 0:51ac1d130fd4 18 * and/or other materials provided with the distribution.
mbed_official 0:51ac1d130fd4 19 * 3. The name of the author may not be used to endorse or promote products
mbed_official 0:51ac1d130fd4 20 * derived from this software without specific prior written permission.
mbed_official 0:51ac1d130fd4 21 *
mbed_official 0:51ac1d130fd4 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
mbed_official 0:51ac1d130fd4 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
mbed_official 0:51ac1d130fd4 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
mbed_official 0:51ac1d130fd4 25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
mbed_official 0:51ac1d130fd4 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
mbed_official 0:51ac1d130fd4 27 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mbed_official 0:51ac1d130fd4 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mbed_official 0:51ac1d130fd4 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
mbed_official 0:51ac1d130fd4 30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
mbed_official 0:51ac1d130fd4 31 * OF SUCH DAMAGE.
mbed_official 0:51ac1d130fd4 32 *
mbed_official 0:51ac1d130fd4 33 * This file is part of the lwIP TCP/IP stack.
mbed_official 0:51ac1d130fd4 34 *
mbed_official 0:51ac1d130fd4 35 * Author: Adam Dunkels <adam@sics.se>
mbed_official 0:51ac1d130fd4 36 *
mbed_official 0:51ac1d130fd4 37 */
mbed_official 0:51ac1d130fd4 38
mbed_official 0:51ac1d130fd4 39 /*
mbed_official 0:51ac1d130fd4 40 * This file is a skeleton for developing Ethernet network interface
mbed_official 0:51ac1d130fd4 41 * drivers for lwIP. Add code to the low_level functions and do a
mbed_official 0:51ac1d130fd4 42 * search-and-replace for the word "ethernetif" to replace it with
mbed_official 0:51ac1d130fd4 43 * something that better describes your network interface.
mbed_official 0:51ac1d130fd4 44 */
mbed_official 0:51ac1d130fd4 45
mbed_official 0:51ac1d130fd4 46 #include "lwip/opt.h"
mbed_official 0:51ac1d130fd4 47
mbed_official 0:51ac1d130fd4 48 #if 0 /* don't build, this is only a skeleton, see previous comment */
mbed_official 0:51ac1d130fd4 49
mbed_official 0:51ac1d130fd4 50 #include "lwip/def.h"
mbed_official 0:51ac1d130fd4 51 #include "lwip/mem.h"
mbed_official 0:51ac1d130fd4 52 #include "lwip/pbuf.h"
mbed_official 0:51ac1d130fd4 53 #include "lwip/sys.h"
mbed_official 0:51ac1d130fd4 54 #include <lwip/stats.h>
mbed_official 0:51ac1d130fd4 55 #include <lwip/snmp.h>
mbed_official 0:51ac1d130fd4 56 #include "netif/etharp.h"
mbed_official 0:51ac1d130fd4 57 #include "netif/ppp_oe.h"
mbed_official 0:51ac1d130fd4 58
mbed_official 0:51ac1d130fd4 59 /* Define those to better describe your network interface. */
mbed_official 0:51ac1d130fd4 60 #define IFNAME0 'e'
mbed_official 0:51ac1d130fd4 61 #define IFNAME1 'n'
mbed_official 0:51ac1d130fd4 62
mbed_official 0:51ac1d130fd4 63 /**
mbed_official 0:51ac1d130fd4 64 * Helper struct to hold private data used to operate your ethernet interface.
mbed_official 0:51ac1d130fd4 65 * Keeping the ethernet address of the MAC in this struct is not necessary
mbed_official 0:51ac1d130fd4 66 * as it is already kept in the struct netif.
mbed_official 0:51ac1d130fd4 67 * But this is only an example, anyway...
mbed_official 0:51ac1d130fd4 68 */
mbed_official 0:51ac1d130fd4 69 struct ethernetif {
mbed_official 0:51ac1d130fd4 70 struct eth_addr *ethaddr;
mbed_official 0:51ac1d130fd4 71 /* Add whatever per-interface state that is needed here. */
mbed_official 0:51ac1d130fd4 72 };
mbed_official 0:51ac1d130fd4 73
mbed_official 0:51ac1d130fd4 74 /* Forward declarations. */
mbed_official 0:51ac1d130fd4 75 static void ethernetif_input(struct netif *netif);
mbed_official 0:51ac1d130fd4 76
mbed_official 0:51ac1d130fd4 77 /**
mbed_official 0:51ac1d130fd4 78 * In this function, the hardware should be initialized.
mbed_official 0:51ac1d130fd4 79 * Called from ethernetif_init().
mbed_official 0:51ac1d130fd4 80 *
mbed_official 0:51ac1d130fd4 81 * @param netif the already initialized lwip network interface structure
mbed_official 0:51ac1d130fd4 82 * for this ethernetif
mbed_official 0:51ac1d130fd4 83 */
mbed_official 0:51ac1d130fd4 84 static void
mbed_official 0:51ac1d130fd4 85 low_level_init(struct netif *netif)
mbed_official 0:51ac1d130fd4 86 {
mbed_official 0:51ac1d130fd4 87 struct ethernetif *ethernetif = netif->state;
mbed_official 0:51ac1d130fd4 88
mbed_official 0:51ac1d130fd4 89 /* set MAC hardware address length */
mbed_official 0:51ac1d130fd4 90 netif->hwaddr_len = ETHARP_HWADDR_LEN;
mbed_official 0:51ac1d130fd4 91
mbed_official 0:51ac1d130fd4 92 /* set MAC hardware address */
mbed_official 0:51ac1d130fd4 93 netif->hwaddr[0] = ;
mbed_official 0:51ac1d130fd4 94 ...
mbed_official 0:51ac1d130fd4 95 netif->hwaddr[5] = ;
mbed_official 0:51ac1d130fd4 96
mbed_official 0:51ac1d130fd4 97 /* maximum transfer unit */
mbed_official 0:51ac1d130fd4 98 netif->mtu = 1500;
mbed_official 0:51ac1d130fd4 99
mbed_official 0:51ac1d130fd4 100 /* device capabilities */
mbed_official 0:51ac1d130fd4 101 /* don't set NETIF_FLAG_ETHARP if this device is not an ethernet one */
mbed_official 0:51ac1d130fd4 102 netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_LINK_UP;
mbed_official 0:51ac1d130fd4 103
mbed_official 0:51ac1d130fd4 104 /* Do whatever else is needed to initialize interface. */
mbed_official 0:51ac1d130fd4 105 }
mbed_official 0:51ac1d130fd4 106
mbed_official 0:51ac1d130fd4 107 /**
mbed_official 0:51ac1d130fd4 108 * This function should do the actual transmission of the packet. The packet is
mbed_official 0:51ac1d130fd4 109 * contained in the pbuf that is passed to the function. This pbuf
mbed_official 0:51ac1d130fd4 110 * might be chained.
mbed_official 0:51ac1d130fd4 111 *
mbed_official 0:51ac1d130fd4 112 * @param netif the lwip network interface structure for this ethernetif
mbed_official 0:51ac1d130fd4 113 * @param p the MAC packet to send (e.g. IP packet including MAC addresses and type)
mbed_official 0:51ac1d130fd4 114 * @return ERR_OK if the packet could be sent
mbed_official 0:51ac1d130fd4 115 * an err_t value if the packet couldn't be sent
mbed_official 0:51ac1d130fd4 116 *
mbed_official 0:51ac1d130fd4 117 * @note Returning ERR_MEM here if a DMA queue of your MAC is full can lead to
mbed_official 0:51ac1d130fd4 118 * strange results. You might consider waiting for space in the DMA queue
mbed_official 0:51ac1d130fd4 119 * to become availale since the stack doesn't retry to send a packet
mbed_official 0:51ac1d130fd4 120 * dropped because of memory failure (except for the TCP timers).
mbed_official 0:51ac1d130fd4 121 */
mbed_official 0:51ac1d130fd4 122
mbed_official 0:51ac1d130fd4 123 static err_t
mbed_official 0:51ac1d130fd4 124 low_level_output(struct netif *netif, struct pbuf *p)
mbed_official 0:51ac1d130fd4 125 {
mbed_official 0:51ac1d130fd4 126 struct ethernetif *ethernetif = netif->state;
mbed_official 0:51ac1d130fd4 127 struct pbuf *q;
mbed_official 0:51ac1d130fd4 128
mbed_official 0:51ac1d130fd4 129 initiate transfer();
mbed_official 0:51ac1d130fd4 130
mbed_official 0:51ac1d130fd4 131 #if ETH_PAD_SIZE
mbed_official 0:51ac1d130fd4 132 pbuf_header(p, -ETH_PAD_SIZE); /* drop the padding word */
mbed_official 0:51ac1d130fd4 133 #endif
mbed_official 0:51ac1d130fd4 134
mbed_official 0:51ac1d130fd4 135 for(q = p; q != NULL; q = q->next) {
mbed_official 0:51ac1d130fd4 136 /* Send the data from the pbuf to the interface, one pbuf at a
mbed_official 0:51ac1d130fd4 137 time. The size of the data in each pbuf is kept in the ->len
mbed_official 0:51ac1d130fd4 138 variable. */
mbed_official 0:51ac1d130fd4 139 send data from(q->payload, q->len);
mbed_official 0:51ac1d130fd4 140 }
mbed_official 0:51ac1d130fd4 141
mbed_official 0:51ac1d130fd4 142 signal that packet should be sent();
mbed_official 0:51ac1d130fd4 143
mbed_official 0:51ac1d130fd4 144 #if ETH_PAD_SIZE
mbed_official 0:51ac1d130fd4 145 pbuf_header(p, ETH_PAD_SIZE); /* reclaim the padding word */
mbed_official 0:51ac1d130fd4 146 #endif
mbed_official 0:51ac1d130fd4 147
mbed_official 0:51ac1d130fd4 148 LINK_STATS_INC(link.xmit);
mbed_official 0:51ac1d130fd4 149
mbed_official 0:51ac1d130fd4 150 return ERR_OK;
mbed_official 0:51ac1d130fd4 151 }
mbed_official 0:51ac1d130fd4 152
mbed_official 0:51ac1d130fd4 153 /**
mbed_official 0:51ac1d130fd4 154 * Should allocate a pbuf and transfer the bytes of the incoming
mbed_official 0:51ac1d130fd4 155 * packet from the interface into the pbuf.
mbed_official 0:51ac1d130fd4 156 *
mbed_official 0:51ac1d130fd4 157 * @param netif the lwip network interface structure for this ethernetif
mbed_official 0:51ac1d130fd4 158 * @return a pbuf filled with the received packet (including MAC header)
mbed_official 0:51ac1d130fd4 159 * NULL on memory error
mbed_official 0:51ac1d130fd4 160 */
mbed_official 0:51ac1d130fd4 161 static struct pbuf *
mbed_official 0:51ac1d130fd4 162 low_level_input(struct netif *netif)
mbed_official 0:51ac1d130fd4 163 {
mbed_official 0:51ac1d130fd4 164 struct ethernetif *ethernetif = netif->state;
mbed_official 0:51ac1d130fd4 165 struct pbuf *p, *q;
mbed_official 0:51ac1d130fd4 166 u16_t len;
mbed_official 0:51ac1d130fd4 167
mbed_official 0:51ac1d130fd4 168 /* Obtain the size of the packet and put it into the "len"
mbed_official 0:51ac1d130fd4 169 variable. */
mbed_official 0:51ac1d130fd4 170 len = ;
mbed_official 0:51ac1d130fd4 171
mbed_official 0:51ac1d130fd4 172 #if ETH_PAD_SIZE
mbed_official 0:51ac1d130fd4 173 len += ETH_PAD_SIZE; /* allow room for Ethernet padding */
mbed_official 0:51ac1d130fd4 174 #endif
mbed_official 0:51ac1d130fd4 175
mbed_official 0:51ac1d130fd4 176 /* We allocate a pbuf chain of pbufs from the pool. */
mbed_official 0:51ac1d130fd4 177 p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
mbed_official 0:51ac1d130fd4 178
mbed_official 0:51ac1d130fd4 179 if (p != NULL) {
mbed_official 0:51ac1d130fd4 180
mbed_official 0:51ac1d130fd4 181 #if ETH_PAD_SIZE
mbed_official 0:51ac1d130fd4 182 pbuf_header(p, -ETH_PAD_SIZE); /* drop the padding word */
mbed_official 0:51ac1d130fd4 183 #endif
mbed_official 0:51ac1d130fd4 184
mbed_official 0:51ac1d130fd4 185 /* We iterate over the pbuf chain until we have read the entire
mbed_official 0:51ac1d130fd4 186 * packet into the pbuf. */
mbed_official 0:51ac1d130fd4 187 for(q = p; q != NULL; q = q->next) {
mbed_official 0:51ac1d130fd4 188 /* Read enough bytes to fill this pbuf in the chain. The
mbed_official 0:51ac1d130fd4 189 * available data in the pbuf is given by the q->len
mbed_official 0:51ac1d130fd4 190 * variable.
mbed_official 0:51ac1d130fd4 191 * This does not necessarily have to be a memcpy, you can also preallocate
mbed_official 0:51ac1d130fd4 192 * pbufs for a DMA-enabled MAC and after receiving truncate it to the
mbed_official 0:51ac1d130fd4 193 * actually received size. In this case, ensure the tot_len member of the
mbed_official 0:51ac1d130fd4 194 * pbuf is the sum of the chained pbuf len members.
mbed_official 0:51ac1d130fd4 195 */
mbed_official 0:51ac1d130fd4 196 read data into(q->payload, q->len);
mbed_official 0:51ac1d130fd4 197 }
mbed_official 0:51ac1d130fd4 198 acknowledge that packet has been read();
mbed_official 0:51ac1d130fd4 199
mbed_official 0:51ac1d130fd4 200 #if ETH_PAD_SIZE
mbed_official 0:51ac1d130fd4 201 pbuf_header(p, ETH_PAD_SIZE); /* reclaim the padding word */
mbed_official 0:51ac1d130fd4 202 #endif
mbed_official 0:51ac1d130fd4 203
mbed_official 0:51ac1d130fd4 204 LINK_STATS_INC(link.recv);
mbed_official 0:51ac1d130fd4 205 } else {
mbed_official 0:51ac1d130fd4 206 drop packet();
mbed_official 0:51ac1d130fd4 207 LINK_STATS_INC(link.memerr);
mbed_official 0:51ac1d130fd4 208 LINK_STATS_INC(link.drop);
mbed_official 0:51ac1d130fd4 209 }
mbed_official 0:51ac1d130fd4 210
mbed_official 0:51ac1d130fd4 211 return p;
mbed_official 0:51ac1d130fd4 212 }
mbed_official 0:51ac1d130fd4 213
mbed_official 0:51ac1d130fd4 214 /**
mbed_official 0:51ac1d130fd4 215 * This function should be called when a packet is ready to be read
mbed_official 0:51ac1d130fd4 216 * from the interface. It uses the function low_level_input() that
mbed_official 0:51ac1d130fd4 217 * should handle the actual reception of bytes from the network
mbed_official 0:51ac1d130fd4 218 * interface. Then the type of the received packet is determined and
mbed_official 0:51ac1d130fd4 219 * the appropriate input function is called.
mbed_official 0:51ac1d130fd4 220 *
mbed_official 0:51ac1d130fd4 221 * @param netif the lwip network interface structure for this ethernetif
mbed_official 0:51ac1d130fd4 222 */
mbed_official 0:51ac1d130fd4 223 static void
mbed_official 0:51ac1d130fd4 224 ethernetif_input(struct netif *netif)
mbed_official 0:51ac1d130fd4 225 {
mbed_official 0:51ac1d130fd4 226 struct ethernetif *ethernetif;
mbed_official 0:51ac1d130fd4 227 struct eth_hdr *ethhdr;
mbed_official 0:51ac1d130fd4 228 struct pbuf *p;
mbed_official 0:51ac1d130fd4 229
mbed_official 0:51ac1d130fd4 230 ethernetif = netif->state;
mbed_official 0:51ac1d130fd4 231
mbed_official 0:51ac1d130fd4 232 /* move received packet into a new pbuf */
mbed_official 0:51ac1d130fd4 233 p = low_level_input(netif);
mbed_official 0:51ac1d130fd4 234 /* no packet could be read, silently ignore this */
mbed_official 0:51ac1d130fd4 235 if (p == NULL) return;
mbed_official 0:51ac1d130fd4 236 /* points to packet payload, which starts with an Ethernet header */
mbed_official 0:51ac1d130fd4 237 ethhdr = p->payload;
mbed_official 0:51ac1d130fd4 238
mbed_official 0:51ac1d130fd4 239 switch (htons(ethhdr->type)) {
mbed_official 0:51ac1d130fd4 240 /* IP or ARP packet? */
mbed_official 0:51ac1d130fd4 241 case ETHTYPE_IP:
mbed_official 0:51ac1d130fd4 242 case ETHTYPE_ARP:
mbed_official 0:51ac1d130fd4 243 #if PPPOE_SUPPORT
mbed_official 0:51ac1d130fd4 244 /* PPPoE packet? */
mbed_official 0:51ac1d130fd4 245 case ETHTYPE_PPPOEDISC:
mbed_official 0:51ac1d130fd4 246 case ETHTYPE_PPPOE:
mbed_official 0:51ac1d130fd4 247 #endif /* PPPOE_SUPPORT */
mbed_official 0:51ac1d130fd4 248 /* full packet send to tcpip_thread to process */
mbed_official 0:51ac1d130fd4 249 if (netif->input(p, netif)!=ERR_OK)
mbed_official 0:51ac1d130fd4 250 { LWIP_DEBUGF(NETIF_DEBUG, ("ethernetif_input: IP input error\n"));
mbed_official 0:51ac1d130fd4 251 pbuf_free(p);
mbed_official 0:51ac1d130fd4 252 p = NULL;
mbed_official 0:51ac1d130fd4 253 }
mbed_official 0:51ac1d130fd4 254 break;
mbed_official 0:51ac1d130fd4 255
mbed_official 0:51ac1d130fd4 256 default:
mbed_official 0:51ac1d130fd4 257 pbuf_free(p);
mbed_official 0:51ac1d130fd4 258 p = NULL;
mbed_official 0:51ac1d130fd4 259 break;
mbed_official 0:51ac1d130fd4 260 }
mbed_official 0:51ac1d130fd4 261 }
mbed_official 0:51ac1d130fd4 262
mbed_official 0:51ac1d130fd4 263 /**
mbed_official 0:51ac1d130fd4 264 * Should be called at the beginning of the program to set up the
mbed_official 0:51ac1d130fd4 265 * network interface. It calls the function low_level_init() to do the
mbed_official 0:51ac1d130fd4 266 * actual setup of the hardware.
mbed_official 0:51ac1d130fd4 267 *
mbed_official 0:51ac1d130fd4 268 * This function should be passed as a parameter to netif_add().
mbed_official 0:51ac1d130fd4 269 *
mbed_official 0:51ac1d130fd4 270 * @param netif the lwip network interface structure for this ethernetif
mbed_official 0:51ac1d130fd4 271 * @return ERR_OK if the loopif is initialized
mbed_official 0:51ac1d130fd4 272 * ERR_MEM if private data couldn't be allocated
mbed_official 0:51ac1d130fd4 273 * any other err_t on error
mbed_official 0:51ac1d130fd4 274 */
mbed_official 0:51ac1d130fd4 275 err_t
mbed_official 0:51ac1d130fd4 276 ethernetif_init(struct netif *netif)
mbed_official 0:51ac1d130fd4 277 {
mbed_official 0:51ac1d130fd4 278 struct ethernetif *ethernetif;
mbed_official 0:51ac1d130fd4 279
mbed_official 0:51ac1d130fd4 280 LWIP_ASSERT("netif != NULL", (netif != NULL));
mbed_official 0:51ac1d130fd4 281
mbed_official 0:51ac1d130fd4 282 ethernetif = mem_malloc(sizeof(struct ethernetif));
mbed_official 0:51ac1d130fd4 283 if (ethernetif == NULL) {
mbed_official 0:51ac1d130fd4 284 LWIP_DEBUGF(NETIF_DEBUG, ("ethernetif_init: out of memory\n"));
mbed_official 0:51ac1d130fd4 285 return ERR_MEM;
mbed_official 0:51ac1d130fd4 286 }
mbed_official 0:51ac1d130fd4 287
mbed_official 0:51ac1d130fd4 288 #if LWIP_NETIF_HOSTNAME
mbed_official 0:51ac1d130fd4 289 /* Initialize interface hostname */
mbed_official 0:51ac1d130fd4 290 netif->hostname = "lwip";
mbed_official 0:51ac1d130fd4 291 #endif /* LWIP_NETIF_HOSTNAME */
mbed_official 0:51ac1d130fd4 292
mbed_official 0:51ac1d130fd4 293 /*
mbed_official 0:51ac1d130fd4 294 * Initialize the snmp variables and counters inside the struct netif.
mbed_official 0:51ac1d130fd4 295 * The last argument should be replaced with your link speed, in units
mbed_official 0:51ac1d130fd4 296 * of bits per second.
mbed_official 0:51ac1d130fd4 297 */
mbed_official 0:51ac1d130fd4 298 NETIF_INIT_SNMP(netif, snmp_ifType_ethernet_csmacd, LINK_SPEED_OF_YOUR_NETIF_IN_BPS);
mbed_official 0:51ac1d130fd4 299
mbed_official 0:51ac1d130fd4 300 netif->state = ethernetif;
mbed_official 0:51ac1d130fd4 301 netif->name[0] = IFNAME0;
mbed_official 0:51ac1d130fd4 302 netif->name[1] = IFNAME1;
mbed_official 0:51ac1d130fd4 303 /* We directly use etharp_output() here to save a function call.
mbed_official 0:51ac1d130fd4 304 * You can instead declare your own function an call etharp_output()
mbed_official 0:51ac1d130fd4 305 * from it if you have to do some checks before sending (e.g. if link
mbed_official 0:51ac1d130fd4 306 * is available...) */
mbed_official 0:51ac1d130fd4 307 netif->output = etharp_output;
mbed_official 0:51ac1d130fd4 308 netif->linkoutput = low_level_output;
mbed_official 0:51ac1d130fd4 309
mbed_official 0:51ac1d130fd4 310 ethernetif->ethaddr = (struct eth_addr *)&(netif->hwaddr[0]);
mbed_official 0:51ac1d130fd4 311
mbed_official 0:51ac1d130fd4 312 /* initialize the hardware */
mbed_official 0:51ac1d130fd4 313 low_level_init(netif);
mbed_official 0:51ac1d130fd4 314
mbed_official 0:51ac1d130fd4 315 return ERR_OK;
mbed_official 0:51ac1d130fd4 316 }
mbed_official 0:51ac1d130fd4 317
mbed_official 0:51ac1d130fd4 318 #endif /* 0 */