Contiki-NG
enc28j60-ip64-driver.c
1 /*
2  * Copyright (c) 2012-2013, Thingsquare, http://www.thingsquare.com/.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the copyright holder nor the names of its
14  * contributors may be used to endorse or promote products derived
15  * from this software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
20  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
21  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
28  * OF THE POSSIBILITY OF SUCH DAMAGE.
29  *
30  */
31 
32 #include "contiki.h"
33 #include "enc28j60.h"
34 #include "enc28j60-ip64-driver.h"
35 #include "linkaddr.h"
36 
37 #include "ip64/ip64.h"
38 #include "ip64/ip64-eth.h"
39 
40 #include <string.h>
41 #include <stdio.h>
42 
43 PROCESS(enc28j60_ip64_driver_process, "ENC28J60 IP64 driver");
44 
45 /*---------------------------------------------------------------------------*/
46 static void
47 init(void)
48 {
49  uint8_t eui64[8];
50  uint8_t macaddr[6];
51 
52  /* Assume that linkaddr_node_addr holds the EUI64 of this device. */
53  memcpy(eui64, &linkaddr_node_addr, sizeof(eui64));
54 
55  /* Mangle the EUI64 into a 48-bit Ethernet address. */
56  memcpy(&macaddr[0], &eui64[0], 3);
57  memcpy(&macaddr[3], &eui64[5], 3);
58 
59  /* In case the OUI happens to contain a broadcast bit, we mask that
60  out here. */
61  macaddr[0] = (macaddr[0] & 0xfe);
62 
63  /* Set the U/L bit, in order to create a locally administered MAC address */
64  macaddr[0] = (macaddr[0] | 0x02);
65 
66  memcpy(ip64_eth_addr.addr, macaddr, sizeof(macaddr));
67 
68  printf("MAC addr %02x:%02x:%02x:%02x:%02x:%02x\n",
69  macaddr[0], macaddr[1], macaddr[2],
70  macaddr[3], macaddr[4], macaddr[5]);
71  enc28j60_init(macaddr);
72  process_start(&enc28j60_ip64_driver_process, NULL);
73 }
74 /*---------------------------------------------------------------------------*/
75 static int
76 output(uint8_t *packet, uint16_t len)
77 {
78  enc28j60_send(packet, len);
79  return len;
80 }
81 /*---------------------------------------------------------------------------*/
82 PROCESS_THREAD(enc28j60_ip64_driver_process, ev, data)
83 {
84  static int len;
85  static struct etimer e;
86  PROCESS_BEGIN();
87 
88  while(1) {
89  etimer_set(&e, 1);
91  len = enc28j60_read(ip64_packet_buffer, ip64_packet_buffer_maxlen);
92  if(len > 0) {
93  IP64_INPUT(ip64_packet_buffer, len);
94  }
95  }
96 
97  PROCESS_END();
98 }
99 /*---------------------------------------------------------------------------*/
100 const struct ip64_driver enc28j60_ip64_driver = {
101  init,
102  output
103 };
104 /*---------------------------------------------------------------------------*/
#define PROCESS(name, strname)
Declare a process.
Definition: process.h:307
#define PROCESS_WAIT_EVENT()
Wait for an event to be posted to the process.
Definition: process.h:141
The Ethernet address.
Definition: ip64-eth.h:40
#define PROCESS_BEGIN()
Define the beginning of a process.
Definition: process.h:120
Header file for the link-layer address representation
#define PROCESS_END()
Define the end of a process.
Definition: process.h:131
static uint8_t output(const linkaddr_t *localdest)
Take an IP packet and format it to be sent on an 802.15.4 network using 6lowpan.
Definition: sicslowpan.c:1565
linkaddr_t linkaddr_node_addr
The link-layer address of the node.
Definition: linkaddr.c:48
A timer.
Definition: etimer.h:76
PROCESS_THREAD(cc2538_rf_process, ev, data)
Implementation of the cc2538 RF driver process.
Definition: cc2538-rf.c:1107
void etimer_set(struct etimer *et, clock_time_t interval)
Set an event timer.
Definition: etimer.c:177
void process_start(struct process *p, process_data_t data)
Start a process.
Definition: process.c:99