void send_DAO_ACK(ipv6_addr_t *destination)
{
DEBUG("%s, %d: Send DAO ACK\n", __FILE__, __LINE__);
rpl_dodag_t *my_dodag;
my_dodag = rpl_get_my_dodag();
if (my_dodag == NULL) {
return;
}
mutex_lock(&rpl_send_mutex);
icmp_send_buf = get_rpl_send_icmpv6_buf(ipv6_ext_hdr_len);
icmp_send_buf->type = ICMPV6_TYPE_RPL_CONTROL;
icmp_send_buf->code = ICMP_CODE_DAO_ACK;
rpl_send_dao_ack_buf = get_rpl_send_dao_ack_buf();
rpl_send_dao_ack_buf->rpl_instanceid = my_dodag->instance->id;
rpl_send_dao_ack_buf->d_reserved = 0;
rpl_send_dao_ack_buf->dao_sequence = my_dodag->dao_seq;
rpl_send_dao_ack_buf->status = 0;
uint16_t plen = ICMPV6_HDR_LEN + DAO_ACK_LEN;
rpl_send(destination, (uint8_t *)icmp_send_buf, plen, IPV6_PROTO_NUM_ICMPV6);
mutex_unlock(&rpl_send_mutex);
}
void rpl_send_DAO_ACK(rpl_dodag_t *my_dodag, ipv6_addr_t *destination)
{
#if ENABLE_DEBUG
if (destination) {
DEBUGF("Send DAO ACK to %s\n",
ipv6_addr_to_str(addr_str, IPV6_MAX_ADDR_STR_LEN, destination));
}
#endif
if (my_dodag == NULL) {
return;
}
icmp_send_buf = get_rpl_send_icmpv6_buf(ipv6_ext_hdr_len);
icmp_send_buf->type = ICMPV6_TYPE_RPL_CONTROL;
icmp_send_buf->code = ICMP_CODE_DAO_ACK;
rpl_send_dao_ack_buf = get_rpl_send_dao_ack_buf();
rpl_send_dao_ack_buf->rpl_instanceid = my_dodag->instance->id;
rpl_send_dao_ack_buf->d_reserved = 0;
rpl_send_dao_ack_buf->dao_sequence = my_dodag->dao_seq;
rpl_send_dao_ack_buf->status = 0;
uint16_t plen = ICMPV6_HDR_LEN + DAO_ACK_LEN;
rpl_send(destination, (uint8_t *)icmp_send_buf, plen, IPV6_PROTO_NUM_ICMPV6);
}
void send_DAO_ACK(ipv6_addr_t *destination)
{
char addr_str[IPV6_MAX_ADDR_STR_LEN];
printf("%s\n", ipv6_addr_to_str(addr_str, destination));
rpl_dodag_t *my_dodag;
my_dodag = rpl_get_my_dodag();
if (my_dodag == NULL) {
return;
}
mutex_lock(&rpl_send_mutex);
icmp_send_buf = get_rpl_send_icmpv6_buf(ipv6_ext_hdr_len);
icmp_send_buf->type = ICMPV6_TYPE_RPL_CONTROL;
icmp_send_buf->code = ICMP_CODE_DAO_ACK;
icmp_send_buf->checksum = ~icmpv6_csum(IPV6_PROTO_NUM_ICMPV6);
rpl_send_dao_ack_buf = get_rpl_send_dao_ack_buf();
rpl_send_dao_ack_buf->rpl_instanceid = my_dodag->instance->id;
rpl_send_dao_ack_buf->d_reserved = 0;
rpl_send_dao_ack_buf->dao_sequence = my_dodag->dao_seq;
rpl_send_dao_ack_buf->status = 0;
uint16_t plen = ICMPV6_HDR_LEN + DIS_BASE_LEN;
rpl_send(destination, (uint8_t *)icmp_send_buf, plen, IPV6_PROTO_NUM_ICMPV6, NULL);
mutex_unlock(&rpl_send_mutex);
}
/* obligatory for each mode. normally not modified */
void rpl_send(ipv6_addr_t *destination, uint8_t *payload, uint16_t p_len, uint8_t next_header)
{
uint8_t *p_ptr;
ipv6_send_buf = get_rpl_send_ipv6_buf();
p_ptr = get_rpl_send_payload_buf(ipv6_ext_hdr_len);
ipv6_send_buf->version_trafficclass = IPV6_VER;
ipv6_send_buf->trafficclass_flowlabel = 0;
ipv6_send_buf->flowlabel = 0;
ipv6_send_buf->nextheader = next_header;
ipv6_send_buf->hoplimit = MULTIHOP_HOPLIMIT;
ipv6_send_buf->length = HTONS(p_len);
memcpy(&(ipv6_send_buf->destaddr), destination, 16);
ipv6_net_if_get_best_src_addr(&(ipv6_send_buf->srcaddr), &(ipv6_send_buf->destaddr));
icmp_send_buf = get_rpl_send_icmpv6_buf(ipv6_ext_hdr_len);
icmp_send_buf->checksum = icmpv6_csum(ipv6_send_buf, icmp_send_buf);
/* The packet was "assembled" in rpl_%mode%.c. Therefore rpl_send_buf was used.
* Therefore memcpy is not needed because the payload is at the
* right memory location already. */
if (p_ptr != payload) {
memcpy(p_ptr, payload, p_len);
}
ipv6_send_packet(ipv6_send_buf, NULL);
}
/* obligatory for each mode. normally not modified */
void rpl_send(ipv6_addr_t *destination, uint8_t *payload, uint16_t p_len, uint8_t next_header)
{
uint8_t *p_ptr;
ipv6_send_buf = get_rpl_send_ipv6_buf();
p_ptr = get_rpl_send_payload_buf(ipv6_ext_hdr_len);
DEBUGF("Trying to send to destination: %s\n", ipv6_addr_to_str(addr_str_mode,
IPV6_MAX_ADDR_STR_LEN, destination));
ipv6_send_buf->version_trafficclass = IPV6_VER;
ipv6_send_buf->trafficclass_flowlabel = 0;
ipv6_send_buf->flowlabel = 0;
ipv6_send_buf->nextheader = next_header;
ipv6_send_buf->hoplimit = MULTIHOP_HOPLIMIT;
ipv6_send_buf->length = HTONS(p_len);
memcpy(&(ipv6_send_buf->destaddr), destination, 16);
ipv6_net_if_get_best_src_addr(&(ipv6_send_buf->srcaddr), &(ipv6_send_buf->destaddr));
icmp_send_buf = get_rpl_send_icmpv6_buf(ipv6_ext_hdr_len);
icmp_send_buf->checksum = icmpv6_csum(ipv6_send_buf, icmp_send_buf);
/* The packet was "assembled" in rpl_%mode%.c. Therefore rpl_send_buf was used.
* Therefore memcpy is not needed because the payload is at the
* right memory location already. */
if (p_ptr != payload) {
memcpy(p_ptr, payload, p_len);
}
if (ipv6_addr_is_multicast(&ipv6_send_buf->destaddr)) {
ipv6_send_packet(ipv6_send_buf, NULL);
}
else {
/* find appropriate next hop before sending */
ipv6_addr_t *next_hop = rpl_get_next_hop(&ipv6_send_buf->destaddr);
DEBUGF("Trying to send to destination: %s\n", ipv6_addr_to_str(addr_str_mode,
IPV6_MAX_ADDR_STR_LEN, next_hop));
if (next_hop == NULL) {
if (i_am_root) {
DEBUGF("[Error] destination unknown: %s\n", ipv6_addr_to_str(addr_str_mode,
IPV6_MAX_ADDR_STR_LEN, &ipv6_send_buf->destaddr));
return;
}
else {
next_hop = rpl_get_my_preferred_parent();
if (next_hop == NULL) {
DEBUGF("[Error] no preferred parent, dropping package\n");
return;
}
}
}
DEBUGF("Sending done (for RPL)\n");
ipv6_send_packet(ipv6_send_buf, NULL);
}
}
void rpl_send_DIO_mode(ipv6_addr_t *destination)
{
if (i_am_leaf) {
return;
}
rpl_dodag_t *mydodag;
icmp_send_buf = get_rpl_send_icmpv6_buf(ipv6_ext_hdr_len);
mydodag = rpl_get_my_dodag();
if (mydodag == NULL) {
DEBUGF("Error - trying to send DIO without being part of a dodag.\n");
return;
}
icmp_send_buf->type = ICMPV6_TYPE_RPL_CONTROL;
icmp_send_buf->code = ICMP_CODE_DIO;
rpl_send_dio_buf = get_rpl_send_dio_buf();
memset(rpl_send_dio_buf, 0, sizeof(*rpl_send_dio_buf));
DEBUGF("Sending DIO with ");
rpl_send_dio_buf->rpl_instanceid = mydodag->instance->id;
DEBUG("instance %02X ", rpl_send_dio_buf->rpl_instanceid);
rpl_send_dio_buf->version_number = mydodag->version;
rpl_send_dio_buf->rank = mydodag->my_rank;
DEBUG("rank %04X\n", rpl_send_dio_buf->rank);
rpl_send_dio_buf->g_mop_prf = (mydodag->grounded << RPL_GROUNDED_SHIFT) |
(mydodag->mop << RPL_MOP_SHIFT) | mydodag->prf;
rpl_send_dio_buf->dtsn = mydodag->dtsn;
rpl_send_dio_buf->flags = 0;
rpl_send_dio_buf->reserved = 0;
rpl_send_dio_buf->dodagid = mydodag->dodag_id;
int opt_hdr_len = 0;
/* DODAG configuration option */
rpl_send_opt_dodag_conf_buf = get_rpl_send_opt_dodag_conf_buf(DIO_BASE_LEN);
rpl_send_opt_dodag_conf_buf->type = RPL_OPT_DODAG_CONF;
rpl_send_opt_dodag_conf_buf->length = RPL_OPT_DODAG_CONF_LEN;
rpl_send_opt_dodag_conf_buf->flags_a_pcs = 0;
rpl_send_opt_dodag_conf_buf->DIOIntDoubl = mydodag->dio_interval_doubling;
rpl_send_opt_dodag_conf_buf->DIOIntMin = mydodag->dio_min;
rpl_send_opt_dodag_conf_buf->DIORedun = mydodag->dio_redundancy;
rpl_send_opt_dodag_conf_buf->MaxRankIncrease = mydodag->maxrankincrease;
rpl_send_opt_dodag_conf_buf->MinHopRankIncrease = mydodag->minhoprankincrease;
rpl_send_opt_dodag_conf_buf->ocp = mydodag->of->ocp;
DEBUGF("Building done.\n");
rpl_send_opt_dodag_conf_buf->reserved = 0;
rpl_send_opt_dodag_conf_buf->default_lifetime = mydodag->default_lifetime;
rpl_send_opt_dodag_conf_buf->lifetime_unit = mydodag->lifetime_unit;
opt_hdr_len += RPL_OPT_DODAG_CONF_LEN;
uint16_t plen = ICMPV6_HDR_LEN + DIO_BASE_LEN + opt_hdr_len;
rpl_send(destination, (uint8_t *)icmp_send_buf, plen, IPV6_PROTO_NUM_ICMPV6);
}
void rpl_send(ipv6_addr_t *destination, uint8_t *payload, uint16_t p_len, uint8_t next_header)
{
uint8_t *p_ptr;
ipv6_send_buf = get_rpl_send_ipv6_buf();
p_ptr = get_rpl_send_payload_buf(ipv6_ext_hdr_len);
uint16_t packet_length = 0;
ipv6_send_buf->version_trafficclass = IPV6_VER;
ipv6_send_buf->trafficclass_flowlabel = 0;
ipv6_send_buf->flowlabel = 0;
ipv6_send_buf->nextheader = next_header;
ipv6_send_buf->hoplimit = MULTIHOP_HOPLIMIT;
ipv6_send_buf->length = HTONS(p_len);
memcpy(&(ipv6_send_buf->destaddr), destination, 16);
ipv6_net_if_get_best_src_addr(&(ipv6_send_buf->srcaddr), &(ipv6_send_buf->destaddr));
icmp_send_buf = get_rpl_send_icmpv6_buf(ipv6_ext_hdr_len);
icmp_send_buf->checksum = icmpv6_csum(ipv6_send_buf, icmp_send_buf);
/* The packet was "assembled" in rpl.c. Therefore rpl_send_buf was used.
* Therefore memcpy is not needed because the payload is at the
* right memory location already. */
if (p_ptr != payload) {
memcpy(p_ptr, payload, p_len);
}
packet_length = IPV6_HDR_LEN + p_len;
if (ipv6_addr_is_multicast(&ipv6_send_buf->destaddr)) {
ipv6_send_packet(ipv6_send_buf);
}
else {
/* find appropriate next hop before sending */
ipv6_addr_t *next_hop = rpl_get_next_hop(&ipv6_send_buf->destaddr);
if (next_hop == NULL) {
if (i_am_root) {
DEBUG("%s, %d: [Error] destination unknown\n", __FILE__, __LINE__);
return;
}
else {
next_hop = rpl_get_my_preferred_parent();
if (next_hop == NULL) {
DEBUG("%s, %d: [Error] no preferred parent, dropping package\n", __FILE__, __LINE__);
return;
}
}
}
ipv6_send_packet(ipv6_send_buf);
}
}
void rpl_send_DIS_mode(ipv6_addr_t *destination)
{
icmp_send_buf = get_rpl_send_icmpv6_buf(ipv6_ext_hdr_len);
icmp_send_buf->type = ICMPV6_TYPE_RPL_CONTROL;
icmp_send_buf->code = ICMP_CODE_DIS;
rpl_send_dis_buf = get_rpl_send_dis_buf();
uint16_t plen = ICMPV6_HDR_LEN + DIS_BASE_LEN;
rpl_send(destination, (uint8_t *)icmp_send_buf, plen, IPV6_PROTO_NUM_ICMPV6);
}
void send_DIO(ipv6_addr_t *destination)
{
mutex_lock(&rpl_send_mutex);
rpl_dodag_t *mydodag;
icmp_send_buf = get_rpl_send_icmpv6_buf(ipv6_ext_hdr_len);
mydodag = rpl_get_my_dodag();
if(mydodag == NULL) {
printf("Error, trying to send DIO without being part of a dodag. This should not happen\n");
mutex_unlock(&rpl_send_mutex, 0);
return;
}
icmp_send_buf->type = ICMP_RPL_CONTROL;
icmp_send_buf->code = ICMP_CODE_DIO;
icmp_send_buf->checksum = ~icmpv6_csum(PROTO_NUM_ICMPV6);
rpl_send_dio_buf = get_rpl_send_dio_buf();
memset(rpl_send_dio_buf, 0, sizeof(*rpl_send_dio_buf));
rpl_send_dio_buf->rpl_instanceid = mydodag->instance->id;
rpl_send_dio_buf->version_number = mydodag->version;
rpl_send_dio_buf->rank = mydodag->my_rank;
rpl_send_dio_buf->g_mop_prf = (mydodag->grounded << RPL_GROUNDED_SHIFT) | (mydodag->mop << RPL_MOP_SHIFT) | mydodag->prf;
rpl_send_dio_buf->dtsn = mydodag->dtsn;
rpl_send_dio_buf->flags = 0;
rpl_send_dio_buf->reserved = 0;
rpl_send_dio_buf->dodagid = mydodag->dodag_id;
int opt_hdr_len = 0;
/* DODAG Configuration Option! */
rpl_send_opt_dodag_conf_buf = get_rpl_send_opt_dodag_conf_buf(DIO_BASE_LEN);
rpl_send_opt_dodag_conf_buf->type = RPL_OPT_DODAG_CONF;
rpl_send_opt_dodag_conf_buf->length = RPL_OPT_DODAG_CONF_LEN;
rpl_send_opt_dodag_conf_buf->flags_a_pcs = 0;
rpl_send_opt_dodag_conf_buf->DIOIntDoubl = mydodag->dio_interval_doubling;
rpl_send_opt_dodag_conf_buf->DIOIntMin = mydodag->dio_min;
rpl_send_opt_dodag_conf_buf->DIORedun = mydodag->dio_redundancy;
rpl_send_opt_dodag_conf_buf->MaxRankIncrease = mydodag->maxrankincrease;
rpl_send_opt_dodag_conf_buf->MinHopRankIncrease = mydodag->minhoprankincrease;
rpl_send_opt_dodag_conf_buf->ocp = mydodag->of->ocp;
rpl_send_opt_dodag_conf_buf->reserved = 0;
rpl_send_opt_dodag_conf_buf->default_lifetime = mydodag->default_lifetime;
rpl_send_opt_dodag_conf_buf->lifetime_unit = mydodag->lifetime_unit;
opt_hdr_len += RPL_OPT_LEN + RPL_OPT_DODAG_CONF_LEN;
uint16_t plen = ICMPV6_HDR_LEN + DIO_BASE_LEN + opt_hdr_len;
rpl_send(destination, (uint8_t *)icmp_send_buf, plen, PROTO_NUM_ICMPV6, NULL);
mutex_unlock(&rpl_send_mutex, 0);
}
void send_DIS(ipv6_addr_t *destination)
{
DEBUG("%s, %d: Send DIS\n", __FILE__, __LINE__);
mutex_lock(&rpl_send_mutex);
icmp_send_buf = get_rpl_send_icmpv6_buf(ipv6_ext_hdr_len);
icmp_send_buf->type = ICMPV6_TYPE_RPL_CONTROL;
icmp_send_buf->code = ICMP_CODE_DIS;
rpl_send_dis_buf = get_rpl_send_dis_buf();
uint16_t plen = ICMPV6_HDR_LEN + DIS_BASE_LEN;
rpl_send(destination, (uint8_t *)icmp_send_buf, plen, IPV6_PROTO_NUM_ICMPV6);
mutex_unlock(&rpl_send_mutex);
}
void send_DIS(ipv6_addr_t *destination)
{
mutex_lock(&rpl_send_mutex);
icmp_send_buf = get_rpl_send_icmpv6_buf(ipv6_ext_hdr_len);
icmp_send_buf->type = ICMPV6_TYPE_RPL_CONTROL;
icmp_send_buf->code = ICMP_CODE_DIS;
icmp_send_buf->checksum = ~icmpv6_csum(IPV6_PROTO_NUM_ICMPV6);
rpl_send_dis_buf = get_rpl_send_dis_buf();
uint16_t plen = ICMPV6_HDR_LEN + DIS_BASE_LEN;
rpl_send(destination, (uint8_t *)icmp_send_buf, plen, IPV6_PROTO_NUM_ICMPV6, NULL);
mutex_unlock(&rpl_send_mutex);
}
void rpl_send_DIS(ipv6_addr_t *destination)
{
#if ENABLE_DEBUG
if (destination) {
DEBUGF("Send DIS to %s\n", ipv6_addr_to_str(addr_str, IPV6_MAX_ADDR_STR_LEN, destination));
}
#endif
icmp_send_buf = get_rpl_send_icmpv6_buf(ipv6_ext_hdr_len);
icmp_send_buf->type = ICMPV6_TYPE_RPL_CONTROL;
icmp_send_buf->code = ICMP_CODE_DIS;
rpl_send_dis_buf = get_rpl_send_dis_buf();
uint16_t plen = ICMPV6_HDR_LEN + DIS_BASE_LEN;
rpl_send(destination, (uint8_t *)icmp_send_buf, plen, IPV6_PROTO_NUM_ICMPV6);
}
void rpl_send_DAO_ACK_mode(ipv6_addr_t *destination)
{
rpl_dodag_t *my_dodag;
my_dodag = rpl_get_my_dodag();
if (my_dodag == NULL) {
return;
}
icmp_send_buf = get_rpl_send_icmpv6_buf(ipv6_ext_hdr_len);
icmp_send_buf->type = ICMPV6_TYPE_RPL_CONTROL;
icmp_send_buf->code = ICMP_CODE_DAO_ACK;
rpl_send_dao_ack_buf = get_rpl_send_dao_ack_buf();
rpl_send_dao_ack_buf->rpl_instanceid = my_dodag->instance->id;
rpl_send_dao_ack_buf->d_reserved = 0;
rpl_send_dao_ack_buf->dao_sequence = my_dodag->dao_seq;
rpl_send_dao_ack_buf->status = 0;
uint16_t plen = ICMPV6_HDR_LEN + DAO_ACK_LEN;
rpl_send(destination, (uint8_t *)icmp_send_buf, plen, IPV6_PROTO_NUM_ICMPV6);
}
void rpl_send_DAO(rpl_dodag_t *my_dodag, ipv6_addr_t *destination, uint8_t lifetime, bool default_lifetime,
uint8_t start_index)
{
#if RPL_DEFAULT_MOP == RPL_MOP_NON_STORING_MODE
(void) start_index;
#endif
#if ENABLE_DEBUG
if (destination) {
DEBUGF("Send DAO to %s\n", ipv6_addr_to_str(addr_str, IPV6_MAX_ADDR_STR_LEN, destination));
}
#endif
if (i_am_root) {
return;
}
if (my_dodag == NULL) {
DEBUGF("send_DAO: I have no my_dodag\n");
return;
}
if (destination == NULL) {
#if RPL_DEFAULT_MOP == RPL_MOP_NON_STORING_MODE
destination = &my_dodag->dodag_id;
#else
if (my_dodag->my_preferred_parent == NULL) {
DEBUGF("send_DAO: my_dodag has no my_preferred_parent\n");
return;
}
destination = &my_dodag->my_preferred_parent->addr;
#endif
}
if (default_lifetime) {
lifetime = my_dodag->default_lifetime;
}
icmp_send_buf = get_rpl_send_icmpv6_buf(ipv6_ext_hdr_len);
icmp_send_buf->type = ICMPV6_TYPE_RPL_CONTROL;
icmp_send_buf->code = ICMP_CODE_DAO;
rpl_send_dao_buf = get_rpl_send_dao_buf();
memset(rpl_send_dao_buf, 0, sizeof(*rpl_send_dao_buf));
rpl_send_dao_buf->rpl_instanceid = my_dodag->instance->id;
rpl_send_dao_buf->k_d_flags = 0x00;
rpl_send_dao_buf->dao_sequence = my_dodag->dao_seq;
uint16_t opt_len = 0;
rpl_send_opt_target_buf = get_rpl_send_opt_target_buf(DAO_BASE_LEN);
#if RPL_DEFAULT_MOP != RPL_MOP_NON_STORING_MODE
/* add all targets from routing table as targets */
uint8_t entries = 0;
uint8_t continue_index = 0;
for (uint8_t i = start_index; i < rpl_max_routing_entries; i++) {
if (rpl_get_routing_table()[i].used) {
rpl_send_opt_target_buf->type = RPL_OPT_TARGET;
rpl_send_opt_target_buf->length = RPL_OPT_TARGET_LEN;
rpl_send_opt_target_buf->flags = 0x00;
rpl_send_opt_target_buf->prefix_length = RPL_DODAG_ID_LEN;
memcpy(&rpl_send_opt_target_buf->target, &rpl_get_routing_table()[i].address,
sizeof(ipv6_addr_t));
opt_len += RPL_OPT_TARGET_LEN_WITH_OPT_LEN;
rpl_send_opt_transit_buf = get_rpl_send_opt_transit_buf(DAO_BASE_LEN + opt_len);
rpl_send_opt_transit_buf->type = RPL_OPT_TRANSIT;
rpl_send_opt_transit_buf->length = (RPL_OPT_TRANSIT_LEN - sizeof(ipv6_addr_t));
rpl_send_opt_transit_buf->e_flags = 0x00;
rpl_send_opt_transit_buf->path_control = 0x00; /* not used */
rpl_send_opt_transit_buf->path_sequence = 0x00; /* not used */
rpl_send_opt_transit_buf->path_lifetime = lifetime;
opt_len += (RPL_OPT_TRANSIT_LEN_WITH_OPT_LEN - sizeof(ipv6_addr_t));
rpl_send_opt_target_buf = get_rpl_send_opt_target_buf(DAO_BASE_LEN + opt_len);
entries++;
}
/* Split DAO, so packages don't get too big.
* The value 5 is based on experience. */
if (entries >= 5) {
continue_index = i + 1;
break;
}
}
#endif
/* add own address */
rpl_send_opt_target_buf->type = RPL_OPT_TARGET;
rpl_send_opt_target_buf->length = RPL_OPT_TARGET_LEN;
rpl_send_opt_target_buf->flags = 0x00;
rpl_send_opt_target_buf->prefix_length = RPL_DODAG_ID_LEN;
if (!ipv6_addr_is_unspecified(&my_dodag->prefix)) {
ipv6_addr_t tmp;
ipv6_addr_set_by_eui64(&tmp, rpl_if_id, &my_dodag->prefix);
memcpy(&rpl_send_opt_target_buf->target, &tmp, sizeof(ipv6_addr_t));
}
else {
memcpy(&rpl_send_opt_target_buf->target, &my_address, sizeof(ipv6_addr_t));
}
opt_len += RPL_OPT_TARGET_LEN_WITH_OPT_LEN;
rpl_send_opt_transit_buf = get_rpl_send_opt_transit_buf(DAO_BASE_LEN + opt_len);
rpl_send_opt_transit_buf->type = RPL_OPT_TRANSIT;
rpl_send_opt_transit_buf->e_flags = 0x00;
rpl_send_opt_transit_buf->path_control = 0x00;
rpl_send_opt_transit_buf->path_sequence = 0x00;
rpl_send_opt_transit_buf->path_lifetime = lifetime;
#if RPL_DEFAULT_MOP == RPL_MOP_NON_STORING_MODE
rpl_send_opt_transit_buf->length = RPL_OPT_TRANSIT_LEN;
memcpy(&rpl_send_opt_transit_buf->parent, &my_dodag->my_preferred_parent->addr, sizeof(ipv6_addr_t));
opt_len += RPL_OPT_TRANSIT_LEN_WITH_OPT_LEN;
#else
rpl_send_opt_transit_buf->length = (RPL_OPT_TRANSIT_LEN - sizeof(ipv6_addr_t));
opt_len += (RPL_OPT_TRANSIT_LEN_WITH_OPT_LEN - sizeof(ipv6_addr_t));
#endif
uint16_t plen = ICMPV6_HDR_LEN + DAO_BASE_LEN + opt_len;
rpl_send(destination, (uint8_t *)icmp_send_buf, plen, IPV6_PROTO_NUM_ICMPV6);
#if RPL_DEFAULT_MOP != RPL_MOP_NON_STORING_MODE
if (continue_index > 1) {
rpl_send_DAO(my_dodag, destination, lifetime, default_lifetime, continue_index);
}
#endif
}
void rpl_send_DIO(rpl_dodag_t *mydodag, ipv6_addr_t *destination)
{
#if ENABLE_DEBUG
if (destination) {
DEBUGF("Send DIO to %s\n", ipv6_addr_to_str(addr_str, IPV6_MAX_ADDR_STR_LEN, destination));
}
#endif
icmp_send_buf = get_rpl_send_icmpv6_buf(ipv6_ext_hdr_len);
if (mydodag == NULL) {
DEBUGF("Error - trying to send DIO without being part of a dodag.\n");
return;
}
icmp_send_buf->type = ICMPV6_TYPE_RPL_CONTROL;
icmp_send_buf->code = ICMP_CODE_DIO;
rpl_send_dio_buf = get_rpl_send_dio_buf();
memset(rpl_send_dio_buf, 0, sizeof(*rpl_send_dio_buf));
DEBUGF("Sending DIO with ");
rpl_send_dio_buf->rpl_instanceid = mydodag->instance->id;
DEBUG("instance %02X ", rpl_send_dio_buf->rpl_instanceid);
rpl_send_dio_buf->version_number = mydodag->version;
rpl_send_dio_buf->rank = byteorder_htons(mydodag->my_rank);
DEBUG("rank %04X\n", byteorder_ntohs(rpl_send_dio_buf->rank));
rpl_send_dio_buf->g_mop_prf = (mydodag->grounded << RPL_GROUNDED_SHIFT) |
(mydodag->mop << RPL_MOP_SHIFT) | mydodag->prf;
rpl_send_dio_buf->dtsn = mydodag->dtsn;
rpl_send_dio_buf->flags = 0;
rpl_send_dio_buf->reserved = 0;
rpl_send_dio_buf->dodagid = mydodag->dodag_id;
int opt_hdr_len = 0;
/* DODAG configuration option */
rpl_send_opt_dodag_conf_buf = get_rpl_send_opt_dodag_conf_buf(DIO_BASE_LEN);
rpl_send_opt_dodag_conf_buf->type = RPL_OPT_DODAG_CONF;
rpl_send_opt_dodag_conf_buf->length = RPL_OPT_DODAG_CONF_LEN;
rpl_send_opt_dodag_conf_buf->flags_a_pcs = 0;
rpl_send_opt_dodag_conf_buf->DIOIntDoubl = mydodag->dio_interval_doubling;
rpl_send_opt_dodag_conf_buf->DIOIntMin = mydodag->dio_min;
rpl_send_opt_dodag_conf_buf->DIORedun = mydodag->dio_redundancy;
rpl_send_opt_dodag_conf_buf->MaxRankIncrease = byteorder_htons(mydodag->maxrankincrease);
rpl_send_opt_dodag_conf_buf->MinHopRankIncrease = byteorder_htons(mydodag->minhoprankincrease);
rpl_send_opt_dodag_conf_buf->ocp = byteorder_htons(mydodag->of->ocp);
rpl_send_opt_dodag_conf_buf->reserved = 0;
rpl_send_opt_dodag_conf_buf->default_lifetime = mydodag->default_lifetime;
rpl_send_opt_dodag_conf_buf->lifetime_unit = byteorder_htons(mydodag->lifetime_unit);
opt_hdr_len += RPL_OPT_DODAG_CONF_LEN_WITH_OPT_LEN;
if (!ipv6_addr_is_unspecified(&mydodag->prefix)) {
rpl_send_opt_prefix_information_buf = get_rpl_send_opt_prefix_information_buf(DIO_BASE_LEN + opt_hdr_len);
rpl_send_opt_prefix_information_buf->type = RPL_OPT_PREFIX_INFO;
rpl_send_opt_prefix_information_buf->length = RPL_OPT_PREFIX_INFO_LEN;
rpl_send_opt_prefix_information_buf->flags = mydodag->prefix_flags;
rpl_send_opt_prefix_information_buf->prefix = mydodag->prefix;
rpl_send_opt_prefix_information_buf->prefix_length = mydodag->prefix_length;
rpl_send_opt_prefix_information_buf->preferred_lifetime = byteorder_htonl(mydodag->prefix_preferred_lifetime);
rpl_send_opt_prefix_information_buf->valid_lifetime = byteorder_htonl(mydodag->prefix_valid_lifetime);
opt_hdr_len += RPL_OPT_PREFIX_INFO_LEN_WITH_OPT_LEN;
}
uint16_t plen = ICMPV6_HDR_LEN + DIO_BASE_LEN + opt_hdr_len;
rpl_send(destination, (uint8_t *)icmp_send_buf, plen, IPV6_PROTO_NUM_ICMPV6);
}
void send_DAO(ipv6_addr_t *destination, uint8_t lifetime, bool default_lifetime, uint8_t start_index)
{
if (i_am_root) {
return;
}
mutex_lock(&rpl_send_mutex);
rpl_dodag_t *my_dodag;
my_dodag = rpl_get_my_dodag();
if (destination == NULL) {
destination = &my_dodag->my_preferred_parent->addr;
}
if (default_lifetime) {
lifetime = my_dodag->default_lifetime;
}
icmp_send_buf = get_rpl_send_icmpv6_buf(ipv6_ext_hdr_len);
icmp_send_buf->type = ICMPV6_TYPE_RPL_CONTROL;
icmp_send_buf->code = ICMP_CODE_DAO;
icmp_send_buf->checksum = ~icmpv6_csum(IPV6_PROTO_NUM_ICMPV6);
if (my_dodag == NULL) {
mutex_unlock(&rpl_send_mutex);
return;
}
rpl_send_dao_buf = get_rpl_send_dao_buf();
memset(rpl_send_dao_buf, 0, sizeof(*rpl_send_dao_buf));
rpl_send_dao_buf->rpl_instanceid = my_dodag->instance->id;
rpl_send_dao_buf->k_d_flags = 0x00;
rpl_send_dao_buf->dao_sequence = my_dodag->dao_seq;
uint16_t opt_len = 0;
rpl_send_opt_target_buf = get_rpl_send_opt_target_buf(DAO_BASE_LEN);
/* add all targets from routing table as targets */
uint8_t entries = 0;
uint8_t continue_index = 0;
for (uint8_t i = start_index; i < RPL_MAX_ROUTING_ENTRIES; i++) {
if (routing_table[i].used) {
rpl_send_opt_target_buf->type = RPL_OPT_TARGET;
rpl_send_opt_target_buf->length = RPL_OPT_TARGET_LEN;
rpl_send_opt_target_buf->flags = 0x00;
rpl_send_opt_target_buf->prefix_length = RPL_DODAG_ID_LEN;
memcpy(&rpl_send_opt_target_buf->target, &routing_table[i].address, sizeof(ipv6_addr_t));
opt_len += RPL_OPT_TARGET_LEN + 2;
rpl_send_opt_transit_buf = get_rpl_send_opt_transit_buf(DAO_BASE_LEN + opt_len);
rpl_send_opt_transit_buf->type = RPL_OPT_TRANSIT;
rpl_send_opt_transit_buf->length = RPL_OPT_TRANSIT_LEN;
rpl_send_opt_transit_buf->e_flags = 0x00;
rpl_send_opt_transit_buf->path_control = 0x00; /* not used */
rpl_send_opt_transit_buf->path_sequence = 0x00; /* not used */
rpl_send_opt_transit_buf->path_lifetime = lifetime;
opt_len += RPL_OPT_TRANSIT_LEN + 2;
rpl_send_opt_target_buf = get_rpl_send_opt_target_buf(DAO_BASE_LEN + opt_len);
entries++;
}
/* Split DAO, so packages don't get too big.
* The value 5 is based on experience. */
if (entries >= 5) {
continue_index = i + 1;
break;
}
}
/* add own address */
rpl_send_opt_target_buf->type = RPL_OPT_TARGET;
rpl_send_opt_target_buf->length = RPL_OPT_TARGET_LEN;
rpl_send_opt_target_buf->flags = 0x00;
rpl_send_opt_target_buf->prefix_length = RPL_DODAG_ID_LEN;
memcpy(&rpl_send_opt_target_buf->target, &my_address, sizeof(ipv6_addr_t));
opt_len += RPL_OPT_TARGET_LEN + 2;
rpl_send_opt_transit_buf = get_rpl_send_opt_transit_buf(DAO_BASE_LEN + opt_len);
rpl_send_opt_transit_buf->type = RPL_OPT_TRANSIT;
rpl_send_opt_transit_buf->length = RPL_OPT_TRANSIT_LEN;
rpl_send_opt_transit_buf->e_flags = 0x00;
rpl_send_opt_transit_buf->path_control = 0x00;
rpl_send_opt_transit_buf->path_sequence = 0x00;
rpl_send_opt_transit_buf->path_lifetime = lifetime;
opt_len += RPL_OPT_TRANSIT_LEN + 2;
uint16_t plen = ICMPV6_HDR_LEN + DAO_BASE_LEN + opt_len;
rpl_send(destination, (uint8_t *)icmp_send_buf, plen, IPV6_PROTO_NUM_ICMPV6, NULL);
mutex_unlock(&rpl_send_mutex);
if (continue_index > 1) {
send_DAO(destination, lifetime, default_lifetime, continue_index);
}
}
void rpl_send_DAO_mode(ipv6_addr_t *destination, uint8_t lifetime, bool default_lifetime, uint8_t start_index)
{
(void) start_index;
if (i_am_root) {
return;
}
/* TODO: take advantage of start_index, by now not used in non-storing mode
start_index++;
*/
rpl_dodag_t *my_dodag;
if ((my_dodag = rpl_get_my_dodag()) == NULL) {
DEBUGF("send_DAO: Not part of a DODAG\n");
return;
}
if (destination == NULL) {
destination = &my_dodag->dodag_id;
}
if (default_lifetime) {
lifetime = my_dodag->default_lifetime;
}
icmp_send_buf = get_rpl_send_icmpv6_buf(ipv6_ext_hdr_len);
icmp_send_buf->type = ICMPV6_TYPE_RPL_CONTROL;
icmp_send_buf->code = ICMP_CODE_DAO;
rpl_send_dao_buf = get_rpl_send_dao_buf();
memset(rpl_send_dao_buf, 0, sizeof(*rpl_send_dao_buf));
rpl_send_dao_buf->rpl_instanceid = my_dodag->instance->id;
rpl_send_dao_buf->k_d_flags = 0x00;
rpl_send_dao_buf->dao_sequence = my_dodag->dao_seq;
uint16_t opt_len = 0;
rpl_send_opt_target_buf = get_rpl_send_opt_target_buf(DAO_BASE_LEN);
/* add own address */
rpl_send_opt_target_buf->type = RPL_OPT_TARGET;
rpl_send_opt_target_buf->length = RPL_OPT_TARGET_LEN;
rpl_send_opt_target_buf->flags = 0x00;
rpl_send_opt_target_buf->prefix_length = RPL_DODAG_ID_LEN;
memcpy(&rpl_send_opt_target_buf->target, &my_address, sizeof(ipv6_addr_t));
/* 18+2=20 bytes for one target-option */
opt_len += RPL_OPT_TARGET_LEN;
/* add parent */
rpl_send_opt_transit_buf = get_rpl_send_opt_transit_buf(DAO_BASE_LEN + opt_len);
rpl_send_opt_transit_buf->type = RPL_OPT_TRANSIT;
rpl_send_opt_transit_buf->length = RPL_OPT_TRANSIT_LEN;
rpl_send_opt_transit_buf->e_flags = 0x00;
rpl_send_opt_transit_buf->path_control = 0x00;
rpl_send_opt_transit_buf->path_sequence = 0x00;
rpl_send_opt_transit_buf->path_lifetime = lifetime;
memcpy(&rpl_send_opt_transit_buf->parent, rpl_get_my_preferred_parent(), sizeof(ipv6_addr_t));
DEBUGF("My pref parent is:%s\n", ipv6_addr_to_str(addr_str_mode, IPV6_MAX_ADDR_STR_LEN,
rpl_get_my_preferred_parent()));
DEBUGF("Send DAO with instance %04X and sequence %04X to %s\n",
rpl_send_dao_buf->rpl_instanceid, rpl_send_dao_buf->dao_sequence,
ipv6_addr_to_str(addr_str_mode, IPV6_MAX_ADDR_STR_LEN, destination));
/* 4+2=6 byte for one transit-option */
opt_len += RPL_OPT_TRANSIT_LEN;
uint16_t plen = ICMPV6_HDR_LEN + DAO_BASE_LEN + opt_len;
rpl_send(destination, (uint8_t *)icmp_send_buf, plen, IPV6_PROTO_NUM_ICMPV6);
}
