nes-proj/examples/ipv6/udp-ipv6/udp-client.c

197 lines
6.4 KiB
C

/*
* 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.
*
* This file is part of the Contiki operating system.
*
*/
#include "contiki.h"
#include "contiki-lib.h"
#include "contiki-net.h"
#include "net/ip/resolv.h"
#include <string.h>
#include <stdbool.h>
#define DEBUG DEBUG_PRINT
#include "net/ip/uip-debug.h"
#define SEND_INTERVAL 15 * CLOCK_SECOND
#define MAX_PAYLOAD_LEN 40
static struct uip_udp_conn *client_conn;
/*---------------------------------------------------------------------------*/
PROCESS(udp_client_process, "UDP client process");
AUTOSTART_PROCESSES(&resolv_process,&udp_client_process);
/*---------------------------------------------------------------------------*/
static void
tcpip_handler(void)
{
char *str;
if(uip_newdata()) {
str = uip_appdata;
str[uip_datalen()] = '\0';
printf("Response from the server: '%s'\n", str);
}
}
/*---------------------------------------------------------------------------*/
static char buf[MAX_PAYLOAD_LEN];
static void
timeout_handler(void)
{
static int seq_id;
printf("Client sending to: ");
PRINT6ADDR(&client_conn->ripaddr);
sprintf(buf, "Hello %d from the client", ++seq_id);
printf(" (msg: %s)\n", buf);
#if SEND_TOO_LARGE_PACKET_TO_TEST_FRAGMENTATION
uip_udp_packet_send(client_conn, buf, UIP_APPDATA_SIZE);
#else /* SEND_TOO_LARGE_PACKET_TO_TEST_FRAGMENTATION */
uip_udp_packet_send(client_conn, buf, strlen(buf));
#endif /* SEND_TOO_LARGE_PACKET_TO_TEST_FRAGMENTATION */
}
/*---------------------------------------------------------------------------*/
static void
print_local_addresses(void)
{
int i;
uint8_t state;
PRINTF("Client IPv6 addresses: ");
for(i = 0; i < UIP_DS6_ADDR_NB; i++) {
state = uip_ds6_if.addr_list[i].state;
if(uip_ds6_if.addr_list[i].isused &&
(state == ADDR_TENTATIVE || state == ADDR_PREFERRED)) {
PRINT6ADDR(&uip_ds6_if.addr_list[i].ipaddr);
PRINTF("\n");
}
}
}
/*---------------------------------------------------------------------------*/
#if UIP_CONF_ROUTER
static void
set_global_address(void)
{
uip_ipaddr_t ipaddr;
uip_ip6addr(&ipaddr, UIP_DS6_DEFAULT_PREFIX, 0, 0, 0, 0, 0, 0, 0);
uip_ds6_set_addr_iid(&ipaddr, &uip_lladdr);
uip_ds6_addr_add(&ipaddr, 0, ADDR_AUTOCONF);
}
#endif /* UIP_CONF_ROUTER */
/*---------------------------------------------------------------------------*/
static resolv_status_t
set_connection_address(uip_ipaddr_t *ipaddr)
{
#ifndef UDP_CONNECTION_ADDR
#if RESOLV_CONF_SUPPORTS_MDNS
#define UDP_CONNECTION_ADDR contiki-udp-server.local
#elif UIP_CONF_ROUTER
#define UDP_CONNECTION_ADDR fd00:0:0:0:0212:7404:0004:0404
#else
#define UDP_CONNECTION_ADDR fe80:0:0:0:6466:6666:6666:6666
#endif
#endif /* !UDP_CONNECTION_ADDR */
#define _QUOTEME(x) #x
#define QUOTEME(x) _QUOTEME(x)
resolv_status_t status = RESOLV_STATUS_ERROR;
if(uiplib_ipaddrconv(QUOTEME(UDP_CONNECTION_ADDR), ipaddr) == 0) {
uip_ipaddr_t *resolved_addr = NULL;
status = resolv_lookup(QUOTEME(UDP_CONNECTION_ADDR),&resolved_addr);
if(status == RESOLV_STATUS_UNCACHED || status == RESOLV_STATUS_EXPIRED) {
PRINTF("Attempting to look up %s\n",QUOTEME(UDP_CONNECTION_ADDR));
resolv_query(QUOTEME(UDP_CONNECTION_ADDR));
status = RESOLV_STATUS_RESOLVING;
} else if(status == RESOLV_STATUS_CACHED && resolved_addr != NULL) {
PRINTF("Lookup of \"%s\" succeded!\n",QUOTEME(UDP_CONNECTION_ADDR));
} else if(status == RESOLV_STATUS_RESOLVING) {
PRINTF("Still looking up \"%s\"...\n",QUOTEME(UDP_CONNECTION_ADDR));
} else {
PRINTF("Lookup of \"%s\" failed. status = %d\n",QUOTEME(UDP_CONNECTION_ADDR),status);
}
if(resolved_addr)
uip_ipaddr_copy(ipaddr, resolved_addr);
} else {
status = RESOLV_STATUS_CACHED;
}
return status;
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(udp_client_process, ev, data)
{
static struct etimer et;
uip_ipaddr_t ipaddr;
PROCESS_BEGIN();
PRINTF("UDP client process started\n");
#if UIP_CONF_ROUTER
set_global_address();
#endif
print_local_addresses();
static resolv_status_t status = RESOLV_STATUS_UNCACHED;
while(status != RESOLV_STATUS_CACHED) {
status = set_connection_address(&ipaddr);
if(status == RESOLV_STATUS_RESOLVING) {
PROCESS_WAIT_EVENT_UNTIL(ev == resolv_event_found);
} else if(status != RESOLV_STATUS_CACHED) {
PRINTF("Can't get connection address.\n");
PROCESS_YIELD();
}
}
/* new connection with remote host */
client_conn = udp_new(&ipaddr, UIP_HTONS(3000), NULL);
udp_bind(client_conn, UIP_HTONS(3001));
PRINTF("Created a connection with the server ");
PRINT6ADDR(&client_conn->ripaddr);
PRINTF(" local/remote port %u/%u\n",
UIP_HTONS(client_conn->lport), UIP_HTONS(client_conn->rport));
etimer_set(&et, SEND_INTERVAL);
while(1) {
PROCESS_YIELD();
if(etimer_expired(&et)) {
timeout_handler();
etimer_restart(&et);
} else if(ev == tcpip_event) {
tcpip_handler();
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/