osd-contiki/examples/antelope/netdb/netdb-client.c

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/*
* Copyright (c) 2011, 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
* A small command-line interface for the querying remote database systems.
* \author
* Nicolas Tsiftes <nvt@sics.se>
*/
#include <stdio.h>
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#include <string.h>
#include "contiki.h"
#include "dev/serial-line.h"
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#include "net/rime/rime.h"
#include "net/rime/mesh.h"
#include "antelope.h"
/*---------------------------------------------------------------------------*/
#define MAX_QUERY_SIZE 100
#define NETDB_CHANNEL 70
#ifndef SERVER_ID
#define SERVER_ID 4
#endif
/*---------------------------------------------------------------------------*/
PROCESS(netdb_process, "NetDB");
AUTOSTART_PROCESSES(&netdb_process);
static unsigned server_id = SERVER_ID;
static struct mesh_conn mesh;
/*---------------------------------------------------------------------------*/
PROCESS(shell_process, "Shell Process");
PROCESS_THREAD(shell_process, ev, data)
{
linkaddr_t addr;
PROCESS_BEGIN();
printf("NetDB client\n");
for(;;) {
PROCESS_WAIT_EVENT_UNTIL(ev == serial_line_event_message && data != NULL);
if(strncmp(data, "server ", 7) == 0) {
server_id = atoi((char *)data + 7);
} else {
printf("%lu Transmitting query \"%s\" to node %u\n", clock_time(), (char *)data, server_id);
packetbuf_copyfrom(data, strlen(data));
addr.u8[0] = server_id;
addr.u8[1] = 0;
packetbuf_set_attr(PACKETBUF_ATTR_PACKET_TYPE,
PACKETBUF_ATTR_PACKET_TYPE_STREAM);
mesh_send(&mesh, &addr);
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
static void
sent(struct mesh_conn *c)
{
}
static void
timedout(struct mesh_conn *c)
{
printf("Failed to send packet: time out\n");
}
static void
received(struct mesh_conn *c, const linkaddr_t *from, uint8_t hops)
{
char *data;
unsigned len;
static char reply[MAX_QUERY_SIZE + 1];
data = (char *)packetbuf_dataptr();
len = packetbuf_datalen();
if(len > MAX_QUERY_SIZE) {
printf("Too long query: %d bytes\n", len);
return;
}
memcpy(reply, data, len);
reply[len] = '\0';
printf("%lu Reply received from %d.%d (%d hops): %s",
clock_time(), from->u8[0], from->u8[1], (int)hops, reply);
}
static const struct mesh_callbacks callbacks = {received, sent, timedout};
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(netdb_process, ev, data)
{
PROCESS_EXITHANDLER(mesh_close(&mesh));
PROCESS_BEGIN();
mesh_open(&mesh, NETDB_CHANNEL, &callbacks);
process_start(&shell_process, NULL);
PROCESS_END();
}