| /* |
| * Copyright (c) 2009, 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. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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. |
| * |
| */ |
| |
| /** |
| * \file |
| * MAC framer for nullmac |
| * \author |
| * Niclas Finne <nfi@sics.se> |
| * Joakim Eriksson <joakime@sics.se> |
| */ |
| |
| #include "contiki/mac/framer-nullmac.h" |
| #include "contiki/packetbuf.h" |
| |
| #ifdef CONFIG_NETWORK_IP_STACK_DEBUG_15_4_FRAMING |
| #define DEBUG 1 |
| #endif |
| #include "contiki/ip/uip-debug.h" |
| |
| struct nullmac_hdr { |
| linkaddr_t receiver; |
| linkaddr_t sender; |
| }; |
| |
| /*---------------------------------------------------------------------------*/ |
| static int |
| hdr_length(struct net_buf *buf) |
| { |
| return sizeof(struct nullmac_hdr); |
| } |
| /*---------------------------------------------------------------------------*/ |
| static int |
| create(struct net_buf *buf) |
| { |
| struct nullmac_hdr *hdr; |
| |
| if(packetbuf_hdralloc(buf, sizeof(struct nullmac_hdr))) { |
| hdr = packetbuf_hdrptr(buf); |
| linkaddr_copy(&(hdr->sender), &linkaddr_node_addr); |
| linkaddr_copy(&(hdr->receiver), packetbuf_addr(buf, PACKETBUF_ADDR_RECEIVER)); |
| return sizeof(struct nullmac_hdr); |
| } |
| PRINTF("PNULLMAC-UT: too large header: %u\n", sizeof(struct nullmac_hdr)); |
| return FRAMER_FAILED; |
| } |
| /*---------------------------------------------------------------------------*/ |
| static int |
| parse(struct net_buf *buf) |
| { |
| struct nullmac_hdr *hdr; |
| hdr = packetbuf_dataptr(buf); |
| if(packetbuf_hdrreduce(buf, sizeof(struct nullmac_hdr))) { |
| packetbuf_set_addr(buf, PACKETBUF_ADDR_SENDER, &(hdr->sender)); |
| packetbuf_set_addr(buf, PACKETBUF_ADDR_RECEIVER, &(hdr->receiver)); |
| |
| PRINTF("PNULLMAC-IN: "); |
| PRINTLLADDR((const uip_lladdr_t *)packetbuf_addr(buf, PACKETBUF_ADDR_SENDER)); |
| PRINTF(" "); |
| PRINTLLADDR((const uip_lladdr_t *)packetbuf_addr(buf, PACKETBUF_ADDR_RECEIVER)); |
| PRINTF(" %u (%u)\n", packetbuf_datalen(buf), sizeof(struct nullmac_hdr)); |
| |
| return sizeof(struct nullmac_hdr); |
| } |
| return FRAMER_FAILED; |
| } |
| /*---------------------------------------------------------------------------*/ |
| const struct framer framer_nullmac = { |
| hdr_length, |
| create, |
| framer_canonical_create_and_secure, |
| parse |
| }; |