sim_serial_packet.c

tinyos2.0版本驱动

/*
 * "Copyright (c) 2005 Stanford University. All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software and
 * its documentation for any purpose, without fee, and without written
 * agreement is hereby granted, provided that the above copyright
 * notice, the following two paragraphs and the author appear in all
 * copies of this software.
 * 
 * IN NO EVENT SHALL STANFORD UNIVERSITY BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
 * IF STANFORD UNIVERSITY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 * 
 * STANFORD UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE
 * PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND STANFORD UNIVERSITY
 * HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
 * ENHANCEMENTS, OR MODIFICATIONS."
 */

/**
 *
 * TOSSIM packet abstract data type, so C++ code can call into nesC
 * code that does the native-to-network type translation.
 *
 * @author Philip Levis
 * @author Chad Metcalf
 * @date   July 15 2007
 */

// $Id: sim_serial_packet.c,v 1.1 2007/10/03 01:50:20 hiro Exp $

#include <sim_serial_packet.h>
#include <message.h>
#include <platform_message.h>

// NOTE: This function is defined in lib/tossim/ActiveMessageC. It
// has to be predeclared here because it is defined within that component.
void serial_active_message_deliver(int node, message_t* m, sim_time_t t);

static serial_header_t* getSerialHeader(message_t* msg) {
    return (serial_header_t*)(msg->data - sizeof(serial_header_t));
}

void sim_serial_packet_set_destination(sim_serial_packet_t* msg, uint16_t dest)__attribute__ ((C, spontaneous)) {
    serial_header_t* hdr = getSerialHeader((message_t*)msg);
    hdr->dest = dest;
}__attribute__ ((C, spontaneous))

uint16_t sim_serial_packet_destination(sim_serial_packet_t* msg)__attribute__ ((C, spontaneous)) {
    serial_header_t* hdr = getSerialHeader((message_t*)msg);
    return hdr->dest;
}

void sim_serial_packet_set_source(sim_serial_packet_t* msg, uint16_t src)__attribute__ ((C, spontaneous)) {
    serial_header_t* hdr = getSerialHeader((message_t*)msg);
    hdr->src = src;
}__attribute__ ((C, spontaneous))

uint16_t sim_serial_packet_source(sim_serial_packet_t* msg)__attribute__ ((C, spontaneous)) {
    serial_header_t* hdr = getSerialHeader((message_t*)msg);
    return hdr->src;
}

void sim_serial_packet_set_length(sim_serial_packet_t* msg, uint8_t length)__attribute__ ((C, spontaneous)) {
    serial_header_t* hdr = getSerialHeader((message_t*)msg);
    hdr->length = length;
}
uint16_t sim_serial_packet_length(sim_serial_packet_t* msg)__attribute__ ((C, spontaneous)) {
    serial_header_t* hdr = getSerialHeader((message_t*)msg);
    return hdr->length;
}

void sim_serial_packet_set_type(sim_serial_packet_t* msg, uint8_t type) __attribute__ ((C, spontaneous)){
    serial_header_t* hdr = getSerialHeader((message_t*)msg);
    hdr->type = type;
}

uint8_t sim_serial_packet_type(sim_serial_packet_t* msg) __attribute__ ((C, spontaneous)){
    serial_header_t* hdr = getSerialHeader((message_t*)msg);
    return hdr->type;
}

uint8_t* sim_serial_packet_data(sim_serial_packet_t* p) __attribute__ ((C, spontaneous)){
    message_t* msg = (message_t*)p;
    return (uint8_t*)&msg->data;
}

void sim_serial_packet_deliver(int node, sim_serial_packet_t* msg, sim_time_t t) __attribute__ ((C, spontaneous)){
    if (t < sim_time()) {
        t = sim_time();
    }
    dbg("Packet", "sim_serial_packet.c: Delivering packet %p to %i at %llu\n", msg, node, t);
    serial_active_message_deliver(node, (message_t*)msg, t);
}

uint8_t sim_serial_packet_max_length(sim_serial_packet_t* msg) __attribute__ ((C, spontaneous)){
    return TOSH_DATA_LENGTH;
}

sim_serial_packet_t* sim_serial_packet_allocate () __attribute__ ((C, spontaneous)){
    return (sim_serial_packet_t*)malloc(sizeof(message_t));
}

void sim_serial_packet_free(sim_serial_packet_t* p) __attribute__ ((C, spontaneous)) {
    printf("sim_serial_packet.c: Freeing packet %p\n", p);
    free(p);
}