contiki/examples/ipv6/rpl-udp/udp-server.c

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/*
* 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/uip.h"
#include "net/rpl/rpl.h"
#include "net/netstack.h"
#include "dev/button-sensor.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#define DEBUG DEBUG_PRINT
#include "net/ip/uip-debug.h"
#define UIP_IP_BUF ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])
#define UDP_CLIENT_PORT 8765
#define UDP_SERVER_PORT 5678
#define UDP_EXAMPLE_ID 190
static struct uip_udp_conn *server_conn;
PROCESS(udp_server_process, "UDP server process");
AUTOSTART_PROCESSES(&udp_server_process);
/*---------------------------------------------------------------------------*/
static void
tcpip_handler(void)
{
char *appdata;
if(uip_newdata()) {
appdata = (char *)uip_appdata;
appdata[uip_datalen()] = 0;
PRINTF("DATA recv '%s' from ", appdata);
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PRINTF("%d",
UIP_IP_BUF->srcipaddr.u8[sizeof(UIP_IP_BUF->srcipaddr.u8) - 1]);
PRINTF("\n");
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#if SERVER_REPLY
PRINTF("DATA sending reply\n");
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uip_ipaddr_copy(&server_conn->ripaddr, &UIP_IP_BUF->srcipaddr);
uip_udp_packet_send(server_conn, "Reply", sizeof("Reply"));
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uip_create_unspecified(&server_conn->ripaddr);
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#endif
}
}
/*---------------------------------------------------------------------------*/
static void
print_local_addresses(void)
{
int i;
uint8_t state;
PRINTF("Server IPv6 addresses: ");
for(i = 0; i < UIP_DS6_ADDR_NB; i++) {
state = uip_ds6_if.addr_list[i].state;
if(state == ADDR_TENTATIVE || state == ADDR_PREFERRED) {
PRINT6ADDR(&uip_ds6_if.addr_list[i].ipaddr);
PRINTF("\n");
/* hack to make address "final" */
if (state == ADDR_TENTATIVE) {
uip_ds6_if.addr_list[i].state = ADDR_PREFERRED;
}
}
}
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(udp_server_process, ev, data)
{
uip_ipaddr_t ipaddr;
struct uip_ds6_addr *root_if;
PROCESS_BEGIN();
PROCESS_PAUSE();
SENSORS_ACTIVATE(button_sensor);
PRINTF("UDP server started. nbr:%d routes:%d\n",
NBR_TABLE_CONF_MAX_NEIGHBORS, UIP_CONF_MAX_ROUTES);
#if UIP_CONF_ROUTER
/* The choice of server address determines its 6LoPAN header compression.
* Obviously the choice made here must also be selected in udp-client.c.
*
* For correct Wireshark decoding using a sniffer, add the /64 prefix to the 6LowPAN protocol preferences,
* e.g. set Context 0 to fd00::. At present Wireshark copies Context/128 and then overwrites it.
* (Setting Context 0 to fd00::1111:2222:3333:4444 will report a 16 bit compressed address of fd00::1111:22ff:fe33:xxxx)
* Note Wireshark's IPCMV6 checksum verification depends on the correct uncompressed addresses.
*/
#if 0
/* Mode 1 - 64 bits inline */
uip_ip6addr(&ipaddr, UIP_DS6_DEFAULT_PREFIX, 0, 0, 0, 0, 0, 0, 1);
#elif 1
/* Mode 2 - 16 bits inline */
uip_ip6addr(&ipaddr, UIP_DS6_DEFAULT_PREFIX, 0, 0, 0, 0, 0x00ff, 0xfe00, 1);
#else
/* Mode 3 - derived from link local (MAC) address */
uip_ip6addr(&ipaddr, UIP_DS6_DEFAULT_PREFIX, 0, 0, 0, 0, 0, 0, 0);
uip_ds6_set_addr_iid(&ipaddr, &uip_lladdr);
#endif
uip_ds6_addr_add(&ipaddr, 0, ADDR_MANUAL);
root_if = uip_ds6_addr_lookup(&ipaddr);
if(root_if != NULL) {
rpl_dag_t *dag;
dag = rpl_set_root(RPL_DEFAULT_INSTANCE,(uip_ip6addr_t *)&ipaddr);
uip_ip6addr(&ipaddr, UIP_DS6_DEFAULT_PREFIX, 0, 0, 0, 0, 0, 0, 0);
rpl_set_prefix(dag, &ipaddr, 64);
PRINTF("created a new RPL dag\n");
} else {
PRINTF("failed to create a new RPL DAG\n");
}
#endif /* UIP_CONF_ROUTER */
print_local_addresses();
/* The data sink runs with a 100% duty cycle in order to ensure high
packet reception rates. */
NETSTACK_MAC.off(1);
server_conn = udp_new(NULL, UIP_HTONS(UDP_CLIENT_PORT), NULL);
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if(server_conn == NULL) {
PRINTF("No UDP connection available, exiting the process!\n");
PROCESS_EXIT();
}
udp_bind(server_conn, UIP_HTONS(UDP_SERVER_PORT));
PRINTF("Created a server connection with remote address ");
PRINT6ADDR(&server_conn->ripaddr);
PRINTF(" local/remote port %u/%u\n", UIP_HTONS(server_conn->lport),
UIP_HTONS(server_conn->rport));
while(1) {
PROCESS_YIELD();
if(ev == tcpip_event) {
tcpip_handler();
} else if (ev == sensors_event && data == &button_sensor) {
PRINTF("Initiaing global repair\n");
rpl_repair_root(RPL_DEFAULT_INSTANCE);
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/