IP64 bindings for the ENC28j60 Ethernet driver

dev/enc28j60/enc28j60-ip64-driver.c

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+/*
+ * Copyright (c) 2012-2013, Thingsquare, http://www.thingsquare.com/.
+ * 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. Neither the name of the copyright holder nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``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
+ * COPYRIGHT HOLDER OR CONTRIBUTORS 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.
+ *
+ */
+
+#include "contiki.h"
+#include "enc28j60.h"
+#include "enc28j60-ip64-driver.h"
+
+#include "ip64.h"
+#include "ip64-eth.h"
+
+#include <string.h>
+#include <stdio.h>
+
+PROCESS(enc28j60_ip64_driver_process, "ENC28J60 IP64 driver");
+
+/*---------------------------------------------------------------------------*/
+static void
+init(void)
+{
+  uint8_t eui64[8];
+  uint8_t macaddr[6];
+
+  /* Assume that linkaddr_node_addr holds the EUI64 of this device. */
+  memcpy(eui64, &linkaddr_node_addr, sizeof(eui64));
+
+  /* Mangle the EUI64 into a 48-bit Ethernet address. */
+  memcpy(&macaddr[0], &eui64[0], 3);
+  memcpy(&macaddr[3], &eui64[5], 3);
+
+  /* In case the OUI happens to contain a broadcast bit, we mask that
+     out here. */
+  macaddr[0] = (macaddr[0] & 0xfe);
+
+  /* Set the U/L bit, in order to create a locally administered MAC address */
+  macaddr[0] = (macaddr[0] | 0x02);
+
+  memcpy(ip64_eth_addr.addr, macaddr, sizeof(macaddr));
+
+  printf("MAC addr %02x:%02x:%02x:%02x:%02x:%02x\n",
+         macaddr[0], macaddr[1], macaddr[2],
+         macaddr[3], macaddr[4], macaddr[5]);
+  enc28j60_init(macaddr);
+  process_start(&enc28j60_ip64_driver_process, NULL);
+}
+/*---------------------------------------------------------------------------*/
+static int
+output(uint8_t *packet, uint16_t len)
+{
+  enc28j60_send(packet, len);
+  return len;
+}
+/*---------------------------------------------------------------------------*/
+PROCESS_THREAD(enc28j60_ip64_driver_process, ev, data)
+{
+  static int len;
+  static struct etimer e;
+  PROCESS_BEGIN();
+
+  while(1) {
+    etimer_set(&e, 1);
+    PROCESS_WAIT_EVENT();
+    len = enc28j60_read(ip64_packet_buffer, ip64_packet_buffer_maxlen);
+    if(len > 0) {
+      IP64_INPUT(ip64_packet_buffer, len);
+    }
+  }
+
+  PROCESS_END();
+}
+/*---------------------------------------------------------------------------*/
+const struct ip64_driver enc28j60_ip64_driver = {
+  init,
+  output
+};
+/*---------------------------------------------------------------------------*/

dev/enc28j60/enc28j60-ip64-driver.h

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2012-2013, Thingsquare, http://www.thingsquare.com/.
+ * 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. Neither the name of the copyright holder nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``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
+ * COPYRIGHT HOLDER OR CONTRIBUTORS 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.
+ *
+ */
+
+#ifndef ENC28J60_IP64_DRIVER_H
+#define ENC28J60_IP64_DRIVER_H
+
+#include "ip64-driver.h"
+extern const struct ip64_driver enc28j60_ip64_driver;
+
+#endif /* ENC28J60_IP64_DRIVER_H */