giomba
/
nes-proj
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
nes-proj/os/net/routing/rpl-lite/rpl-icmp6.c

689 lines
22 KiB
C
Raw Blame History

/*
* Copyright (c) 2010, 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.
*
* This file is part of the Contiki operating system.
*
*/
/**
* \addtogroup rpl-lite
* @{
*
* \file
* ICMP6 I/O for RPL control messages.
*
* \author Joakim Eriksson <joakime@sics.se>, Nicolas Tsiftes <nvt@sics.se>,
* Simon Duquennoy <simon.duquennoy@inria.fr>
* Contributors: Niclas Finne <nfi@sics.se>, Joel Hoglund <joel@sics.se>,
* Mathieu Pouillot <m.pouillot@watteco.com>,
* George Oikonomou <oikonomou@users.sourceforge.net> (multicast)
*/
#include "net/routing/rpl-lite/rpl.h"
#include "net/ipv6/uip-icmp6.h"
#include "net/packetbuf.h"
#include "lib/random.h"
#include <limits.h>
/* Log configuration */
#include "sys/log.h"
#define LOG_MODULE "RPL"
#define LOG_LEVEL LOG_LEVEL_RPL
/*---------------------------------------------------------------------------*/
#define RPL_DIO_GROUNDED 0x80
#define RPL_DIO_MOP_SHIFT 3
#define RPL_DIO_MOP_MASK 0x38
#define RPL_DIO_PREFERENCE_MASK 0x07
/*---------------------------------------------------------------------------*/
static void dis_input(void);
static void dio_input(void);
static void dao_input(void);
/*---------------------------------------------------------------------------*/
/* Initialize RPL ICMPv6 message handlers */
UIP_ICMP6_HANDLER(dis_handler, ICMP6_RPL, RPL_CODE_DIS, dis_input);
UIP_ICMP6_HANDLER(dio_handler, ICMP6_RPL, RPL_CODE_DIO, dio_input);
UIP_ICMP6_HANDLER(dao_handler, ICMP6_RPL, RPL_CODE_DAO, dao_input);
#if RPL_WITH_DAO_ACK
static void dao_ack_input(void);
UIP_ICMP6_HANDLER(dao_ack_handler, ICMP6_RPL, RPL_CODE_DAO_ACK, dao_ack_input);
#endif /* RPL_WITH_DAO_ACK */
/*---------------------------------------------------------------------------*/
static uint32_t
get32(uint8_t *buffer, int pos)
{
return ((uint32_t)buffer[pos] << 24 | (uint32_t)buffer[pos + 1] << 16 |
(uint32_t)buffer[pos + 2] << 8 | buffer[pos + 3]);
}
/*---------------------------------------------------------------------------*/
static void
set32(uint8_t *buffer, int pos, uint32_t value)
{
buffer[pos++] = value >> 24;
buffer[pos++] = (value >> 16) & 0xff;
buffer[pos++] = (value >> 8) & 0xff;
buffer[pos++] = value & 0xff;
}
/*---------------------------------------------------------------------------*/
static uint16_t
get16(uint8_t *buffer, int pos)
{
return (uint16_t)buffer[pos] << 8 | buffer[pos + 1];
}
/*---------------------------------------------------------------------------*/
static void
set16(uint8_t *buffer, int pos, uint16_t value)
{
buffer[pos++] = value >> 8;
buffer[pos++] = value & 0xff;
}
/*---------------------------------------------------------------------------*/
uip_ds6_nbr_t *
rpl_icmp6_update_nbr_table(uip_ipaddr_t *from, nbr_table_reason_t reason, void *data)
{
uip_ds6_nbr_t *nbr;
if((nbr = uip_ds6_nbr_lookup(from)) == NULL) {
if((nbr = uip_ds6_nbr_add(from, (uip_lladdr_t *)
packetbuf_addr(PACKETBUF_ADDR_SENDER),
0, NBR_REACHABLE, reason, data)) == NULL) {
LOG_ERR("could not add neighbor to cache ");
LOG_ERR_6ADDR(from);
LOG_ERR_(", ");
LOG_ERR_LLADDR(packetbuf_addr(PACKETBUF_ADDR_SENDER));
LOG_ERR_("\n");
}
}
return nbr;
}
/*---------------------------------------------------------------------------*/
static void
dis_input(void)
{
if(!curr_instance.used) {
LOG_WARN("dis_input: not in an instance yet, discard\n");
goto discard;
}
LOG_INFO("received a DIS from ");
LOG_INFO_6ADDR(&UIP_IP_BUF->srcipaddr);
LOG_INFO_("\n");
rpl_process_dis(&UIP_IP_BUF->srcipaddr, uip_is_addr_mcast(&UIP_IP_BUF->destipaddr));
discard:
uipbuf_clear();
}
/*---------------------------------------------------------------------------*/
void
rpl_icmp6_dis_output(uip_ipaddr_t *addr)
{
unsigned char *buffer;
/* Make sure we're up-to-date before sending data out */
rpl_dag_update_state();
buffer = UIP_ICMP_PAYLOAD;
buffer[0] = buffer[1] = 0;
if(addr == NULL) {
addr = &rpl_multicast_addr;
}
LOG_INFO("sending a DIS to ");
LOG_INFO_6ADDR(addr);
LOG_INFO_("\n");
uip_icmp6_send(addr, ICMP6_RPL, RPL_CODE_DIS, 2);
}
/*---------------------------------------------------------------------------*/
static void
dio_input(void)
{
unsigned char *buffer;
uint8_t buffer_length;
rpl_dio_t dio;
uint8_t subopt_type;
int i;
int len;
uip_ipaddr_t from;
memset(&dio, 0, sizeof(dio));
/* Set default values in case the DIO configuration option is missing. */
dio.dag_intdoubl = RPL_DIO_INTERVAL_DOUBLINGS;
dio.dag_intmin = RPL_DIO_INTERVAL_MIN;
dio.dag_redund = RPL_DIO_REDUNDANCY;
dio.dag_min_hoprankinc = RPL_MIN_HOPRANKINC;
dio.dag_max_rankinc = RPL_MAX_RANKINC;
dio.ocp = RPL_OF_OCP;
dio.default_lifetime = RPL_DEFAULT_LIFETIME;
dio.lifetime_unit = RPL_DEFAULT_LIFETIME_UNIT;
uip_ipaddr_copy(&from, &UIP_IP_BUF->srcipaddr);
buffer_length = uip_len - uip_l3_icmp_hdr_len;
/* Process the DIO base option. */
i = 0;
buffer = UIP_ICMP_PAYLOAD;
dio.instance_id = buffer[i++];
dio.version = buffer[i++];
dio.rank = get16(buffer, i);
i += 2;
dio.grounded = buffer[i] & RPL_DIO_GROUNDED;
dio.mop = (buffer[i]& RPL_DIO_MOP_MASK) >> RPL_DIO_MOP_SHIFT;
dio.preference = buffer[i++] & RPL_DIO_PREFERENCE_MASK;
dio.dtsn = buffer[i++];
/* two reserved bytes */
i += 2;
memcpy(&dio.dag_id, buffer + i, sizeof(dio.dag_id));
i += sizeof(dio.dag_id);
/* Check if there are any DIO suboptions. */
for(; i < buffer_length; i += len) {
subopt_type = buffer[i];
if(subopt_type == RPL_OPTION_PAD1) {
len = 1;
} else {
/* Suboption with a two-byte header + payload */
len = 2 + buffer[i + 1];
}
if(len + i > buffer_length) {
LOG_ERR("dio_input: malformed packet, discard\n");
goto discard;
}
switch(subopt_type) {
case RPL_OPTION_DAG_METRIC_CONTAINER:
if(len < 6) {
LOG_WARN("dio_input: invalid DAG MC, len %u, discard\n", len);
goto discard;
}
dio.mc.type = buffer[i + 2];
dio.mc.flags = buffer[i + 3] << 1;
dio.mc.flags |= buffer[i + 4] >> 7;
dio.mc.aggr = (buffer[i + 4] >> 4) & 0x3;
dio.mc.prec = buffer[i + 4] & 0xf;
dio.mc.length = buffer[i + 5];
if(dio.mc.type == RPL_DAG_MC_NONE) {
/* No metric container: do nothing */
} else if(dio.mc.type == RPL_DAG_MC_ETX) {
dio.mc.obj.etx = get16(buffer, i + 6);
} else if(dio.mc.type == RPL_DAG_MC_ENERGY) {
dio.mc.obj.energy.flags = buffer[i + 6];
dio.mc.obj.energy.energy_est = buffer[i + 7];
} else {
LOG_WARN("dio_input: unsupported DAG MC type %u, discard\n", (unsigned)dio.mc.type);
goto discard;
}
break;
case RPL_OPTION_ROUTE_INFO:
if(len < 9) {
LOG_WARN("dio_input: invalid destination prefix option, len %u, discard\n", len);
goto discard;
}
/* The flags field includes the preference value. */
dio.destination_prefix.length = buffer[i + 2];
dio.destination_prefix.flags = buffer[i + 3];
dio.destination_prefix.lifetime = get32(buffer, i + 4);
if(((dio.destination_prefix.length + 7) / 8) + 8 <= len &&
dio.destination_prefix.length <= 128) {
memcpy(&dio.destination_prefix.prefix, &buffer[i + 8],
(dio.destination_prefix.length + 7) / 8);
} else {
LOG_WARN("dio_input: invalid route info option, len %u, discard\n", len);
goto discard;
}
break;
case RPL_OPTION_DAG_CONF:
if(len != 16) {
LOG_WARN("dio_input: invalid DAG configuration option, len %u, discard\n", len);
goto discard;
}
/* Path control field not yet implemented - at i + 2 */
dio.dag_intdoubl = buffer[i + 3];
dio.dag_intmin = buffer[i + 4];
dio.dag_redund = buffer[i + 5];
dio.dag_max_rankinc = get16(buffer, i + 6);
dio.dag_min_hoprankinc = get16(buffer, i + 8);
dio.ocp = get16(buffer, i + 10);
/* buffer + 12 is reserved */
dio.default_lifetime = buffer[i + 13];
dio.lifetime_unit = get16(buffer, i + 14);
break;
case RPL_OPTION_PREFIX_INFO:
if(len != 32) {
LOG_WARN("dio_input: invalid DAG prefix info, len %u, discard\n", len);
goto discard;
}
dio.prefix_info.length = buffer[i + 2];
dio.prefix_info.flags = buffer[i + 3];
/* valid lifetime is ingnored for now - at i + 4 */
/* preferred lifetime stored in lifetime */
dio.prefix_info.lifetime = get32(buffer, i + 8);
/* 32-bit reserved at i + 12 */
memcpy(&dio.prefix_info.prefix, &buffer[i + 16], 16);
break;
default:
LOG_WARN("dio_input: unsupported suboption type in DIO: %u, discard\n", (unsigned)subopt_type);
goto discard;
}
}
LOG_INFO("received a %s-DIO from ",
uip_is_addr_mcast(&UIP_IP_BUF->destipaddr) ? "multicast" : "unicast");
LOG_INFO_6ADDR(&from);
LOG_INFO_(", instance_id %u, DAG ID ", (unsigned)dio.instance_id);
LOG_INFO_6ADDR(&dio.dag_id);
LOG_INFO_(", version %u, dtsn %u, rank %u\n",
(unsigned)dio.version,
(unsigned)dio.dtsn,
(unsigned)dio.rank);
rpl_process_dio(&from, &dio);
discard:
uipbuf_clear();
}
/*---------------------------------------------------------------------------*/
void
rpl_icmp6_dio_output(uip_ipaddr_t *uc_addr)
{
unsigned char *buffer;
int pos;
uip_ipaddr_t *addr = uc_addr;
/* Make sure we're up-to-date before sending data out */
rpl_dag_update_state();
if(rpl_get_leaf_only()) {
/* In leaf mode, we only send DIO messages as unicasts in response to
unicast DIS messages. */
if(uc_addr == NULL) {
/* Do not send multicast DIO in leaf mode */
return;
}
}
/* DAG Information Object */
pos = 0;
buffer = UIP_ICMP_PAYLOAD;
buffer[pos++] = curr_instance.instance_id;
buffer[pos++] = curr_instance.dag.version;
if(rpl_get_leaf_only()) {
set16(buffer, pos, RPL_INFINITE_RANK);
} else {
set16(buffer, pos, curr_instance.dag.rank);
}
pos += 2;
buffer[pos] = 0;
if(curr_instance.dag.grounded) {
buffer[pos] |= RPL_DIO_GROUNDED;
}
buffer[pos] |= curr_instance.mop << RPL_DIO_MOP_SHIFT;
buffer[pos] |= curr_instance.dag.preference & RPL_DIO_PREFERENCE_MASK;
pos++;
buffer[pos++] = curr_instance.dtsn_out;
/* reserved 2 bytes */
buffer[pos++] = 0; /* flags */
buffer[pos++] = 0; /* reserved */
memcpy(buffer + pos, &curr_instance.dag.dag_id, sizeof(curr_instance.dag.dag_id));
pos += 16;
if(!rpl_get_leaf_only()) {
if(curr_instance.mc.type != RPL_DAG_MC_NONE) {
buffer[pos++] = RPL_OPTION_DAG_METRIC_CONTAINER;
buffer[pos++] = 6;
buffer[pos++] = curr_instance.mc.type;
buffer[pos++] = curr_instance.mc.flags >> 1;
buffer[pos] = (curr_instance.mc.flags & 1) << 7;
buffer[pos++] |= (curr_instance.mc.aggr << 4) | curr_instance.mc.prec;
if(curr_instance.mc.type == RPL_DAG_MC_ETX) {
buffer[pos++] = 2;
set16(buffer, pos, curr_instance.mc.obj.etx);
pos += 2;
} else if(curr_instance.mc.type == RPL_DAG_MC_ENERGY) {
buffer[pos++] = 2;
buffer[pos++] = curr_instance.mc.obj.energy.flags;
buffer[pos++] = curr_instance.mc.obj.energy.energy_est;
} else {
LOG_ERR("unable to send DIO because of unsupported DAG MC type %u\n",
(unsigned)curr_instance.mc.type);
return;
}
}
}
/* Always add a DAG configuration option. */
buffer[pos++] = RPL_OPTION_DAG_CONF;
buffer[pos++] = 14;
buffer[pos++] = 0; /* No Auth, PCS = 0 */
buffer[pos++] = curr_instance.dio_intdoubl;
buffer[pos++] = curr_instance.dio_intmin;
buffer[pos++] = curr_instance.dio_redundancy;
set16(buffer, pos, curr_instance.max_rankinc);
pos += 2;
set16(buffer, pos, curr_instance.min_hoprankinc);
pos += 2;
/* OCP is in the DAG_CONF option */
set16(buffer, pos, curr_instance.of->ocp);
pos += 2;
buffer[pos++] = 0; /* reserved */
buffer[pos++] = curr_instance.default_lifetime;
set16(buffer, pos, curr_instance.lifetime_unit);
pos += 2;
/* Check if we have a prefix to send also. */
if(curr_instance.dag.prefix_info.length > 0) {
buffer[pos++] = RPL_OPTION_PREFIX_INFO;
buffer[pos++] = 30; /* always 30 bytes + 2 long */
buffer[pos++] = curr_instance.dag.prefix_info.length;
buffer[pos++] = curr_instance.dag.prefix_info.flags;
set32(buffer, pos, curr_instance.dag.prefix_info.lifetime);
pos += 4;
set32(buffer, pos, curr_instance.dag.prefix_info.lifetime);
pos += 4;
memset(&buffer[pos], 0, 4);
pos += 4;
memcpy(&buffer[pos], &curr_instance.dag.prefix_info.prefix, 16);
pos += 16;
}
if(!rpl_get_leaf_only()) {
addr = addr != NULL ? addr : &rpl_multicast_addr;
}
LOG_INFO("sending a %s-DIO with rank %u to ",
uc_addr != NULL ? "unicast" : "multicast",
(unsigned)curr_instance.dag.rank);
LOG_INFO_6ADDR(addr);
LOG_INFO_("\n");
uip_icmp6_send(addr, ICMP6_RPL, RPL_CODE_DIO, pos);
}
/*---------------------------------------------------------------------------*/
static void
dao_input(void)
{
struct rpl_dao dao;
uint8_t subopt_type;
unsigned char *buffer;
uint8_t buffer_length;
int pos;
int len;
int i;
uip_ipaddr_t from;
memset(&dao, 0, sizeof(dao));
dao.instance_id = UIP_ICMP_PAYLOAD[0];
if(!curr_instance.used || curr_instance.instance_id != dao.instance_id) {
LOG_ERR("dao_input: unknown RPL instance %u, discard\n", dao.instance_id);
goto discard;
}
uip_ipaddr_copy(&from, &UIP_IP_BUF->srcipaddr);
memset(&dao.parent_addr, 0, 16);
buffer = UIP_ICMP_PAYLOAD;
buffer_length = uip_len - uip_l3_icmp_hdr_len;
pos = 0;
pos++; /* instance ID */
dao.lifetime = curr_instance.default_lifetime;
dao.flags = buffer[pos++];
pos++; /* reserved */
dao.sequence = buffer[pos++];
/* Is the DAG ID present? */
if(dao.flags & RPL_DAO_D_FLAG) {
if(memcmp(&curr_instance.dag.dag_id, &buffer[pos], sizeof(curr_instance.dag.dag_id))) {
LOG_ERR("dao_input: different DAG ID ");
LOG_ERR_6ADDR((uip_ipaddr_t *)&buffer[pos]);
LOG_ERR_(", discard\n");
goto discard;
}
pos += 16;
}
/* Check if there are any RPL options present. */
for(i = pos; i < buffer_length; i += len) {
subopt_type = buffer[i];
if(subopt_type == RPL_OPTION_PAD1) {
len = 1;
} else {
/* The option consists of a two-byte header and a payload. */
len = 2 + buffer[i + 1];
}
switch(subopt_type) {
case RPL_OPTION_TARGET:
/* Handle the target option. */
dao.prefixlen = buffer[i + 3];
memset(&dao.prefix, 0, sizeof(dao.prefix));
memcpy(&dao.prefix, buffer + i + 4, (dao.prefixlen + 7) / CHAR_BIT);
break;
case RPL_OPTION_TRANSIT:
/* The path sequence and control are ignored. */
/* pathcontrol = buffer[i + 3];
pathsequence = buffer[i + 4];*/
dao.lifetime = buffer[i + 5];
if(len >= 20) {
memcpy(&dao.parent_addr, buffer + i + 6, 16);
}
break;
}
}
/* Destination Advertisement Object */
LOG_INFO("received a %sDAO from ", dao.lifetime == 0 ? "No-path " : "");
LOG_INFO_6ADDR(&UIP_IP_BUF->srcipaddr);
LOG_INFO_(", seqno %u, lifetime %u, prefix ", dao.sequence, dao.lifetime);
LOG_INFO_6ADDR(&dao.prefix);
LOG_INFO_(", prefix length %u, parent ", dao.prefixlen);
LOG_INFO_6ADDR(&dao.parent_addr);
LOG_INFO_(" \n");
rpl_process_dao(&from, &dao);
discard:
uipbuf_clear();
}
/*---------------------------------------------------------------------------*/
void
rpl_icmp6_dao_output(uint8_t lifetime)
{
unsigned char *buffer;
uint8_t prefixlen;
int pos;
const uip_ipaddr_t *prefix = rpl_get_global_address();
uip_ipaddr_t *parent_ipaddr = rpl_neighbor_get_ipaddr(curr_instance.dag.preferred_parent);
/* Make sure we're up-to-date before sending data out */
rpl_dag_update_state();
if(!curr_instance.used) {
LOG_WARN("rpl_icmp6_dao_output: not in an instance, skip sending DAO\n");
return;
}
if(curr_instance.dag.preferred_parent == NULL) {
LOG_WARN("rpl_icmp6_dao_output: no preferred parent, skip sending DAO\n");
return;
}
if(prefix == NULL || parent_ipaddr == NULL || curr_instance.mop == RPL_MOP_NO_DOWNWARD_ROUTES) {
LOG_WARN("rpl_icmp6_dao_output: node not ready to send a DAO (prefix %p, parent addr %p, mop %u)\n",
prefix, parent_ipaddr, curr_instance.mop);
return;
}
buffer = UIP_ICMP_PAYLOAD;
pos = 0;
buffer[pos++] = curr_instance.instance_id;
buffer[pos] = 0;
#if RPL_WITH_DAO_ACK
if(lifetime != 0) {
buffer[pos] |= RPL_DAO_K_FLAG;
}
#endif /* RPL_WITH_DAO_ACK */
++pos;
buffer[pos++] = 0; /* reserved */
buffer[pos++] = curr_instance.dag.dao_curr_seqno;
/* create target subopt */
prefixlen = sizeof(*prefix) * CHAR_BIT;
buffer[pos++] = RPL_OPTION_TARGET;
buffer[pos++] = 2 + ((prefixlen + 7) / CHAR_BIT);
buffer[pos++] = 0; /* reserved */
buffer[pos++] = prefixlen;
memcpy(buffer + pos, prefix, (prefixlen + 7) / CHAR_BIT);
pos += ((prefixlen + 7) / CHAR_BIT);
/* Create a transit information sub-option. */
buffer[pos++] = RPL_OPTION_TRANSIT;
buffer[pos++] = 20;
buffer[pos++] = 0; /* flags - ignored */
buffer[pos++] = 0; /* path control - ignored */
buffer[pos++] = 0; /* path seq - ignored */
buffer[pos++] = lifetime;
/* Include parent global IP address */
memcpy(buffer + pos, &curr_instance.dag.dag_id, 8); /* Prefix */
pos += 8;
memcpy(buffer + pos, ((const unsigned char *)parent_ipaddr) + 8, 8); /* Interface identifier */
pos += 8;
LOG_INFO("sending a %sDAO seqno %u, tx count %u, lifetime %u, prefix ",
lifetime == 0 ? "No-path " : "",
curr_instance.dag.dao_curr_seqno, curr_instance.dag.dao_transmissions, lifetime);
LOG_INFO_6ADDR(prefix);
LOG_INFO_(" to ");
LOG_INFO_6ADDR(&curr_instance.dag.dag_id);
LOG_INFO_(", parent ");
LOG_INFO_6ADDR(parent_ipaddr);
LOG_INFO_("\n");
/* Send DAO to root (IPv6 address is DAG ID) */
uip_icmp6_send(&curr_instance.dag.dag_id, ICMP6_RPL, RPL_CODE_DAO, pos);
}
#if RPL_WITH_DAO_ACK
/*---------------------------------------------------------------------------*/
static void
dao_ack_input(void)
{
uint8_t *buffer;
uint8_t instance_id;
uint8_t sequence;
uint8_t status;
buffer = UIP_ICMP_PAYLOAD;
instance_id = buffer[0];
sequence = buffer[2];
status = buffer[3];
if(!curr_instance.used || curr_instance.instance_id != instance_id) {
LOG_ERR("dao_ack_input: unknown instance, discard\n");
goto discard;
}
LOG_INFO("received a DAO-%s with seqno %d (%d %d) and status %d from ",
status < RPL_DAO_ACK_UNABLE_TO_ACCEPT ? "ACK" : "NACK", sequence,
curr_instance.dag.dao_curr_seqno, curr_instance.dag.dao_curr_seqno, status);
LOG_INFO_6ADDR(&UIP_IP_BUF->srcipaddr);
LOG_INFO_("\n");
rpl_process_dao_ack(sequence, status);
discard:
uipbuf_clear();
}
/*---------------------------------------------------------------------------*/
void
rpl_icmp6_dao_ack_output(uip_ipaddr_t *dest, uint8_t sequence, uint8_t status)
{
unsigned char *buffer;
/* Make sure we're up-to-date before sending data out */
rpl_dag_update_state();
buffer = UIP_ICMP_PAYLOAD;
buffer[0] = curr_instance.instance_id;
buffer[1] = 0;
buffer[2] = sequence;
buffer[3] = status;
LOG_INFO("sending a DAO-%s seqno %d to ",
status < RPL_DAO_ACK_UNABLE_TO_ACCEPT ? "ACK" : "NACK", sequence);
LOG_INFO_6ADDR(dest);
LOG_INFO_(" with status %d\n", status);
uip_icmp6_send(dest, ICMP6_RPL, RPL_CODE_DAO_ACK, 4);
}
#endif /* RPL_WITH_DAO_ACK */
/*---------------------------------------------------------------------------*/
void
rpl_icmp6_init()
{
uip_icmp6_register_input_handler(&dis_handler);
uip_icmp6_register_input_handler(&dio_handler);
uip_icmp6_register_input_handler(&dao_handler);
#if RPL_WITH_DAO_ACK
uip_icmp6_register_input_handler(&dao_ack_handler);
#endif /* RPL_WITH_DAO_ACK */
}
/*---------------------------------------------------------------------------*/
/** @}*/
Reference in New Issue View Git Blame Copy Permalink