54#include "net/routing/rpl-classic/rpl-private.h"
64#define LOG_MODULE "RPL"
65#define LOG_LEVEL LOG_LEVEL_RPL
68#define RPL_DIO_GROUNDED 0x80
69#define RPL_DIO_MOP_SHIFT 3
70#define RPL_DIO_MOP_MASK 0x38
71#define RPL_DIO_PREFERENCE_MASK 0x07
74static void dis_input(
void);
75static void dio_input(
void);
76static void dao_input(
void);
77static void dao_ack_input(
void);
79static void dao_output_target_seq(rpl_parent_t *parent, uip_ipaddr_t *prefix,
80 uint8_t lifetime, uint8_t seq_no);
83#ifdef RPL_DEBUG_DIO_INPUT
84void RPL_DEBUG_DIO_INPUT(uip_ipaddr_t *, rpl_dio_t *);
87#ifdef RPL_DEBUG_DAO_OUTPUT
88void RPL_DEBUG_DAO_OUTPUT(rpl_parent_t *);
91static uint8_t dao_sequence = RPL_LOLLIPOP_INIT;
98UIP_ICMP6_HANDLER(dis_handler,
ICMP6_RPL, RPL_CODE_DIS, dis_input);
99UIP_ICMP6_HANDLER(dio_handler,
ICMP6_RPL, RPL_CODE_DIO, dio_input);
100UIP_ICMP6_HANDLER(dao_handler,
ICMP6_RPL, RPL_CODE_DAO, dao_input);
101UIP_ICMP6_HANDLER(dao_ack_handler,
ICMP6_RPL, RPL_CODE_DAO_ACK, dao_ack_input);
106find_route_entry_by_dao_ack(uint8_t seq)
109 re = uip_ds6_route_head();
111 if(re->state.dao_seqno_out == seq && RPL_ROUTE_IS_DAO_PENDING(re)) {
115 re = uip_ds6_route_next(re);
127 RPL_LOLLIPOP_INCREMENT(dao_sequence);
130 rep->state.dao_seqno_in = sequence;
131 rep->state.dao_seqno_out = dao_sequence;
132 RPL_ROUTE_SET_DAO_PENDING(rep);
138get_global_addr(uip_ipaddr_t *
addr)
142 uip_ipaddr_t *prefix = NULL;
143 uint8_t prefix_length = 0;
146 if(dag != NULL && dag->prefix_info.length != 0) {
147 prefix = &dag->prefix_info.prefix;
148 prefix_length = dag->prefix_info.length;
151 for(i = 0; i < UIP_DS6_ADDR_NB; i++) {
154 state == ADDR_PREFERRED &&
156 (prefix == NULL || uip_ipaddr_prefixcmp(prefix, &
uip_ds6_if.addr_list[i].ipaddr, prefix_length))) {
157 memcpy(
addr, &
uip_ds6_if.addr_list[i].ipaddr,
sizeof(uip_ipaddr_t));
165get32(uint8_t *buffer,
int pos)
167 return ((uint32_t)buffer[pos] << 24 | (uint32_t)buffer[pos + 1] << 16 |
168 (uint32_t)buffer[pos + 2] << 8 | buffer[pos + 3]);
172set32(uint8_t *buffer,
int pos, uint32_t value)
174 buffer[pos++] = value >> 24;
175 buffer[pos++] = (value >> 16) & 0xff;
176 buffer[pos++] = (value >> 8) & 0xff;
177 buffer[pos++] = value & 0xff;
181get16(uint8_t *buffer,
int pos)
183 return (uint16_t)buffer[pos] << 8 | buffer[pos + 1];
187set16(uint8_t *buffer,
int pos, uint16_t value)
189 buffer[pos++] = value >> 8;
190 buffer[pos++] = value & 0xff;
200 packetbuf_addr(PACKETBUF_ADDR_SENDER),
201 0, NBR_REACHABLE, reason, data)) != NULL) {
202 LOG_INFO(
"Neighbor added to neighbor cache ");
203 LOG_INFO_6ADDR(from);
205 LOG_INFO_LLADDR(packetbuf_addr(PACKETBUF_ADDR_SENDER));
220 LOG_INFO(
"Received a DIS from ");
224 for(instance = &instance_table[0], end = instance + RPL_MAX_INSTANCES;
225 instance < end; ++instance) {
226 if(instance->used == 1) {
229 LOG_INFO(
"LEAF ONLY Multicast DIS will NOT reset DIO timer\n");
231 LOG_DBG(
"Multicast DIS => reset DIO timer\n");
232 rpl_reset_dio_timer(instance);
237 NBR_TABLE_REASON_RPL_DIS, NULL) == NULL) {
238 LOG_ERR(
"Out of Memory, not sending unicast DIO, DIS from ");
241 LOG_ERR_LLADDR(packetbuf_addr(PACKETBUF_ADDR_SENDER));
244 LOG_DBG(
"Unicast DIS, reply to sender\n");
255dis_output(uip_ipaddr_t *
addr)
257 unsigned char *buffer;
258 uip_ipaddr_t tmpaddr;
269 buffer = UIP_ICMP_PAYLOAD;
270 buffer[0] = buffer[1] = 0;
277 LOG_INFO(
"Sending a DIS to ");
278 LOG_INFO_6ADDR(
addr);
287 unsigned char *buffer;
288 uint8_t buffer_length;
295 memset(&dio, 0,
sizeof(dio));
298 dio.dag_intdoubl = RPL_DIO_INTERVAL_DOUBLINGS;
299 dio.dag_intmin = RPL_DIO_INTERVAL_MIN;
300 dio.dag_redund = RPL_DIO_REDUNDANCY;
301 dio.dag_min_hoprankinc = RPL_MIN_HOPRANKINC;
302 dio.dag_max_rankinc = RPL_MAX_RANKINC;
303 dio.ocp = RPL_OF_OCP;
304 dio.default_lifetime = RPL_DEFAULT_LIFETIME;
305 dio.lifetime_unit = RPL_DEFAULT_LIFETIME_UNIT;
310 LOG_INFO(
"Received a DIO from ");
311 LOG_INFO_6ADDR(&from);
314 buffer_length =
uip_len - uip_l3_icmp_hdr_len;
318 buffer = UIP_ICMP_PAYLOAD;
320 dio.instance_id = buffer[i++];
321 dio.version = buffer[i++];
322 dio.rank = get16(buffer, i);
325 LOG_DBG(
"Incoming DIO (id, ver, rank) = (%u,%u,%u)\n",
326 (
unsigned)dio.instance_id,
327 (
unsigned)dio.version,
330 dio.grounded = buffer[i] & RPL_DIO_GROUNDED;
331 dio.mop = (buffer[i]& RPL_DIO_MOP_MASK) >> RPL_DIO_MOP_SHIFT;
332 dio.preference = buffer[i++] & RPL_DIO_PREFERENCE_MASK;
334 dio.dtsn = buffer[i++];
338 memcpy(&dio.dag_id, buffer + i,
sizeof(dio.dag_id));
339 i +=
sizeof(dio.dag_id);
341 LOG_DBG(
"Incoming DIO (dag_id, pref) = (");
342 LOG_DBG_6ADDR(&dio.dag_id);
343 LOG_DBG_(
", %u)\n", dio.preference);
346 for(; i < buffer_length; i += len) {
347 subopt_type = buffer[i];
348 if(subopt_type == RPL_OPTION_PAD1) {
352 len = 2 + buffer[i + 1];
355 if(len + i > buffer_length) {
356 LOG_WARN(
"Invalid DIO packet\n");
357 RPL_STAT(rpl_stats.malformed_msgs++);
361 LOG_DBG(
"Incoming DIO (option, length) = (%u, %u)\n",
364 switch(subopt_type) {
365 case RPL_OPTION_PAD1:
366 case RPL_OPTION_PADN:
367 LOG_DBG(
"PAD %u bytes\n", len);
369 case RPL_OPTION_DAG_METRIC_CONTAINER:
371 LOG_WARN(
"Invalid DAG MC, len = %d\n", len);
372 RPL_STAT(rpl_stats.malformed_msgs++);
375 dio.mc.type = buffer[i + 2];
376 dio.mc.flags = buffer[i + 3] << 1;
377 dio.mc.flags |= buffer[i + 4] >> 7;
378 dio.mc.aggr = (buffer[i + 4] >> 4) & 0x3;
379 dio.mc.prec = buffer[i + 4] & 0xf;
380 dio.mc.length = buffer[i + 5];
382 if(dio.mc.type == RPL_DAG_MC_NONE) {
384 }
else if(dio.mc.type == RPL_DAG_MC_ETX) {
385 dio.mc.obj.etx = get16(buffer, i + 6);
387 LOG_DBG(
"DAG MC: type %u, flags %u, aggr %u, prec %u, length %u, ETX %u\n",
388 (
unsigned)dio.mc.type,
389 (
unsigned)dio.mc.flags,
390 (
unsigned)dio.mc.aggr,
391 (
unsigned)dio.mc.prec,
392 (
unsigned)dio.mc.length,
393 (
unsigned)dio.mc.obj.etx);
394 }
else if(dio.mc.type == RPL_DAG_MC_ENERGY) {
395 dio.mc.obj.energy.flags = buffer[i + 6];
396 dio.mc.obj.energy.energy_est = buffer[i + 7];
398 LOG_WARN(
"Unhandled DAG MC type: %u\n", (
unsigned)dio.mc.type);
402 case RPL_OPTION_ROUTE_INFO:
404 LOG_WARN(
"Invalid destination prefix option, len = %d\n", len);
405 RPL_STAT(rpl_stats.malformed_msgs++);
410 dio.destination_prefix.length = buffer[i + 2];
411 dio.destination_prefix.flags = buffer[i + 3];
412 dio.destination_prefix.lifetime = get32(buffer, i + 4);
414 if(((dio.destination_prefix.length + 7) / 8) + 8 <= len &&
415 dio.destination_prefix.length <= 128) {
416 LOG_INFO(
"Copying destination prefix\n");
417 memcpy(&dio.destination_prefix.prefix, &buffer[i + 8],
418 (dio.destination_prefix.length + 7) / 8);
420 LOG_WARN(
"Invalid route info option, len = %d\n", len);
421 RPL_STAT(rpl_stats.malformed_msgs++);
426 case RPL_OPTION_DAG_CONF:
428 LOG_WARN(
"Invalid DAG configuration option, len = %d\n", len);
429 RPL_STAT(rpl_stats.malformed_msgs++);
434 dio.dag_intdoubl = buffer[i + 3];
435 dio.dag_intmin = buffer[i + 4];
436 dio.dag_redund = buffer[i + 5];
437 dio.dag_max_rankinc = get16(buffer, i + 6);
438 dio.dag_min_hoprankinc = get16(buffer, i + 8);
439 dio.ocp = get16(buffer, i + 10);
441 dio.default_lifetime = buffer[i + 13];
442 dio.lifetime_unit = get16(buffer, i + 14);
443 LOG_INFO(
"DAG conf:dbl=%d, min=%d red=%d maxinc=%d mininc=%d ocp=%d d_l=%u l_u=%u\n",
444 dio.dag_intdoubl, dio.dag_intmin, dio.dag_redund,
445 dio.dag_max_rankinc, dio.dag_min_hoprankinc, dio.ocp,
446 dio.default_lifetime, dio.lifetime_unit);
448 case RPL_OPTION_PREFIX_INFO:
450 LOG_WARN(
"Invalid DAG prefix info, len != 32\n");
451 RPL_STAT(rpl_stats.malformed_msgs++);
454 dio.prefix_info.length = buffer[i + 2];
456 if(dio.prefix_info.length >
sizeof(uip_ipaddr_t) * 8) {
457 LOG_WARN(
"Invalid DAG prefix info, len %u > %u\n",
458 dio.prefix_info.length, (
unsigned)(
sizeof(uip_ipaddr_t) * 8));
459 RPL_STAT(rpl_stats.malformed_msgs++);
463 dio.prefix_info.flags = buffer[i + 3];
466 dio.prefix_info.lifetime = get32(buffer, i + 8);
468 LOG_INFO(
"Copying prefix information\n");
469 memcpy(&dio.prefix_info.prefix, &buffer[i + 16], 16);
472 LOG_WARN(
"Unsupported suboption type in DIO: %u\n",
473 (
unsigned)subopt_type);
477#ifdef RPL_DEBUG_DIO_INPUT
478 RPL_DEBUG_DIO_INPUT(&from, &dio);
490 unsigned char *buffer;
501 if(uc_addr == NULL) {
502 LOG_DBG(
"LEAF ONLY have multicast addr: skip dio_output\n");
510 buffer = UIP_ICMP_PAYLOAD;
511 buffer[pos++] = instance->instance_id;
512 buffer[pos++] = dag->version;
513 is_root = (dag->rank ==
ROOT_RANK(instance));
516 LOG_DBG(
"LEAF ONLY DIO rank set to RPL_INFINITE_RANK\n");
517 set16(buffer, pos, RPL_INFINITE_RANK);
519 set16(buffer, pos, dag->rank);
525 buffer[pos] |= RPL_DIO_GROUNDED;
528 buffer[pos] |= instance->mop << RPL_DIO_MOP_SHIFT;
529 buffer[pos] |= dag->preference & RPL_DIO_PREFERENCE_MASK;
532 buffer[pos++] = instance->dtsn_out;
534 if(RPL_DIO_REFRESH_DAO_ROUTES && is_root && uc_addr == NULL) {
538 RPL_LOLLIPOP_INCREMENT(instance->dtsn_out);
545 memcpy(buffer + pos, &dag->dag_id,
sizeof(dag->dag_id));
549 if(instance->mc.type != RPL_DAG_MC_NONE) {
550 instance->of->update_metric_container(instance);
552 buffer[pos++] = RPL_OPTION_DAG_METRIC_CONTAINER;
554 buffer[pos++] = instance->mc.type;
555 buffer[pos++] = instance->mc.flags >> 1;
556 buffer[pos] = (instance->mc.flags & 1) << 7;
557 buffer[pos++] |= (instance->mc.aggr << 4) | instance->mc.prec;
558 if(instance->mc.type == RPL_DAG_MC_ETX) {
560 set16(buffer, pos, instance->mc.obj.etx);
562 }
else if(instance->mc.type == RPL_DAG_MC_ENERGY) {
564 buffer[pos++] = instance->mc.obj.energy.flags;
565 buffer[pos++] = instance->mc.obj.energy.energy_est;
567 LOG_ERR(
"Unable to send DIO because of unhandled DAG MC type %u\n",
568 (
unsigned)instance->mc.type);
575 buffer[pos++] = RPL_OPTION_DAG_CONF;
578 buffer[pos++] = instance->dio_intdoubl;
579 buffer[pos++] = instance->dio_intmin;
580 buffer[pos++] = instance->dio_redundancy;
581 set16(buffer, pos, instance->max_rankinc);
583 set16(buffer, pos, instance->min_hoprankinc);
586 set16(buffer, pos, instance->of->ocp);
589 buffer[pos++] = instance->default_lifetime;
590 set16(buffer, pos, instance->lifetime_unit);
594 if(dag->prefix_info.length > 0) {
595 buffer[pos++] = RPL_OPTION_PREFIX_INFO;
597 buffer[pos++] = dag->prefix_info.length;
598 buffer[pos++] = dag->prefix_info.flags;
599 set32(buffer, pos, dag->prefix_info.lifetime);
601 set32(buffer, pos, dag->prefix_info.lifetime);
603 memset(&buffer[pos], 0, 4);
605 memcpy(&buffer[pos], &dag->prefix_info.prefix, 16);
607 LOG_DBG(
"Sending prefix info in DIO for ");
608 LOG_DBG_6ADDR(&dag->prefix_info.prefix);
611 LOG_DBG(
"No prefix to announce (len %d)\n",
612 dag->prefix_info.length);
616 if(LOG_DBG_ENABLED) {
617 if(uc_addr == NULL) {
618 LOG_DBG(
"LEAF ONLY sending unicast-DIO from multicast-DIO\n");
622 LOG_INFO(
"Sending unicast-DIO with rank %u to ",
623 (
unsigned)dag->rank);
624 LOG_INFO_6ADDR(uc_addr);
629 if(uc_addr == NULL) {
630 LOG_INFO(
"Sending a multicast-DIO with rank %u\n",
631 (
unsigned)instance->current_dag->rank);
635 LOG_INFO(
"Sending unicast-DIO with rank %u to ",
636 (
unsigned)instance->current_dag->rank);
637 LOG_INFO_6ADDR(uc_addr);
645dao_input_storing(
void)
648 uip_ipaddr_t dao_sender_addr;
651 unsigned char *buffer;
664 uint8_t buffer_length;
669 rpl_parent_t *parent;
675 memset(&prefix, 0,
sizeof(prefix));
679 buffer = UIP_ICMP_PAYLOAD;
680 buffer_length =
uip_len - uip_l3_icmp_hdr_len;
683 instance_id = buffer[pos++];
685 instance = rpl_get_instance(instance_id);
687 lifetime = instance->default_lifetime;
689 flags = buffer[pos++];
692 sequence = buffer[pos++];
694 dag = instance->current_dag;
695 is_root = (dag->rank ==
ROOT_RANK(instance));
698 if(flags & RPL_DAO_D_FLAG) {
699 if(memcmp(&dag->dag_id, &buffer[pos],
sizeof(dag->dag_id))) {
700 LOG_INFO(
"Ignoring a DAO for a DAG different from ours\n");
707 RPL_ROUTE_FROM_MULTICAST_DAO : RPL_ROUTE_FROM_UNICAST_DAO;
710 LOG_DBG(
"Received a (%s) DAO with sequence number %u from ",
711 learned_from == RPL_ROUTE_FROM_UNICAST_DAO?
"unicast":
"multicast", sequence);
712 LOG_DBG_6ADDR(&dao_sender_addr);
715 if(learned_from == RPL_ROUTE_FROM_UNICAST_DAO) {
717 parent = rpl_find_parent(dag, &dao_sender_addr);
722 LOG_WARN(
"Loop detected when receiving a unicast DAO from a node with a lower rank! (%u < %u)\n",
724 parent->rank = RPL_INFINITE_RANK;
725 parent->flags |= RPL_PARENT_FLAG_UPDATED;
730 if(parent != NULL && parent == dag->preferred_parent) {
731 LOG_WARN(
"Loop detected when receiving a unicast DAO from our parent\n");
732 parent->rank = RPL_INFINITE_RANK;
733 parent->flags |= RPL_PARENT_FLAG_UPDATED;
739 for(i = pos; i < buffer_length; i += len) {
740 subopt_type = buffer[i];
741 if(subopt_type == RPL_OPTION_PAD1) {
745 len = 2 + buffer[i + 1];
748 switch(subopt_type) {
749 case RPL_OPTION_TARGET:
751 prefixlen = buffer[i + 3];
756 if(prefixlen > 128) {
757 LOG_ERR(
"Too large target prefix length %d\n", prefixlen);
760 if(i + 4 + ((prefixlen + 7) / CHAR_BIT) > buffer_length) {
761 LOG_ERR(
"Insufficient space to copy RPL Target of %d bits\n",
765 memset(&prefix, 0,
sizeof(prefix));
766 memcpy(&prefix, buffer + i + 4, (prefixlen + 7) / CHAR_BIT);
768 case RPL_OPTION_TRANSIT:
772 lifetime = buffer[i + 5];
778 LOG_INFO(
"DAO lifetime: %u, prefix length: %u prefix: ",
779 (
unsigned)lifetime, (
unsigned)prefixlen);
780 LOG_INFO_6ADDR(&prefix);
783#if RPL_WITH_MULTICAST
792 mcast_group->
dag = dag;
799 rep = uip_ds6_route_lookup(&prefix);
801 if(lifetime == RPL_ZERO_LIFETIME) {
802 LOG_INFO(
"No-Path DAO received\n");
805 !RPL_ROUTE_IS_NOPATH_RECEIVED(rep) &&
806 rep->length == prefixlen &&
807 uip_ds6_route_nexthop(rep) != NULL &&
808 uip_ipaddr_cmp(uip_ds6_route_nexthop(rep), &dao_sender_addr)) {
809 LOG_DBG(
"Setting expiration timer for prefix ");
810 LOG_DBG_6ADDR(&prefix);
812 RPL_ROUTE_SET_NOPATH_RECEIVED(rep);
813 rep->state.lifetime = RPL_NOPATH_REMOVAL_DELAY;
817 if(dag->preferred_parent != NULL &&
818 rpl_parent_get_ipaddr(dag->preferred_parent) != NULL) {
820 out_seq = prepare_for_dao_fwd(sequence, rep);
822 LOG_DBG(
"Forwarding No-path DAO to parent - out_seq:%d",
824 LOG_DBG_6ADDR(rpl_parent_get_ipaddr(dag->preferred_parent));
827 buffer = UIP_ICMP_PAYLOAD;
834 if(flags & RPL_DAO_K_FLAG) {
837 dao_ack_output(instance, &dao_sender_addr, sequence,
838 RPL_DAO_ACK_UNCONDITIONAL_ACCEPT);
843 LOG_INFO(
"Adding DAO route\n");
847 LOG_ERR(
"Out of Memory, dropping DAO from ");
848 LOG_ERR_6ADDR(&dao_sender_addr);
850 LOG_ERR_LLADDR(packetbuf_addr(PACKETBUF_ADDR_SENDER));
852 if(flags & RPL_DAO_K_FLAG) {
854 dao_ack_output(instance, &dao_sender_addr, sequence,
855 is_root ? RPL_DAO_ACK_UNABLE_TO_ADD_ROUTE_AT_ROOT :
856 RPL_DAO_ACK_UNABLE_TO_ACCEPT);
861 rep = rpl_add_route(dag, &prefix, prefixlen, &dao_sender_addr);
863 RPL_STAT(rpl_stats.mem_overflows++);
864 LOG_ERR(
"Could not add a route after receiving a DAO\n");
865 if(flags & RPL_DAO_K_FLAG) {
867 dao_ack_output(instance, &dao_sender_addr, sequence,
868 is_root ? RPL_DAO_ACK_UNABLE_TO_ADD_ROUTE_AT_ROOT :
869 RPL_DAO_ACK_UNABLE_TO_ACCEPT);
876 RPL_ROUTE_CLEAR_NOPATH_RECEIVED(rep);
878#if RPL_WITH_MULTICAST
882 if(learned_from == RPL_ROUTE_FROM_UNICAST_DAO) {
885 if(flags & RPL_DAO_K_FLAG) {
893 if((!RPL_ROUTE_IS_DAO_PENDING(rep) &&
894 rep->state.dao_seqno_in == sequence) ||
901 if(dag->preferred_parent != NULL &&
902 rpl_parent_get_ipaddr(dag->preferred_parent) != NULL) {
906 if(RPL_ROUTE_IS_DAO_PENDING(rep) &&
907 rep->state.dao_seqno_in == sequence) {
909 out_seq = rep->state.dao_seqno_out;
911 out_seq = prepare_for_dao_fwd(sequence, rep);
915 LOG_DBG(
"Forwarding DAO to parent ");
916 LOG_DBG_6ADDR(rpl_parent_get_ipaddr(dag->preferred_parent));
917 LOG_DBG_(
" in seq: %d out seq: %d\n", sequence, out_seq);
919 buffer = UIP_ICMP_PAYLOAD;
925 LOG_DBG(
"Sending DAO ACK\n");
927 dao_ack_output(instance, &dao_sender_addr, sequence,
928 RPL_DAO_ACK_UNCONDITIONAL_ACCEPT);
935dao_input_nonstoring(
void)
937#if RPL_WITH_NON_STORING
938 uip_ipaddr_t dao_sender_addr;
939 uip_ipaddr_t dao_parent_addr;
942 unsigned char *buffer;
950 uint8_t buffer_length;
956 LOG_INFO(
"Received a DAO from ");
963 memset(&dao_parent_addr, 0, 16);
965 buffer = UIP_ICMP_PAYLOAD;
966 buffer_length =
uip_len - uip_l3_icmp_hdr_len;
969 instance_id = buffer[pos++];
970 instance = rpl_get_instance(instance_id);
971 lifetime = instance->default_lifetime;
973 flags = buffer[pos++];
976 sequence = buffer[pos++];
978 dag = instance->current_dag;
980 if(flags & RPL_DAO_D_FLAG) {
981 if(memcmp(&dag->dag_id, &buffer[pos],
sizeof(dag->dag_id))) {
982 LOG_INFO(
"Ignoring a DAO for a DAG different from ours\n");
989 for(i = pos; i < buffer_length; i += len) {
990 subopt_type = buffer[i];
991 if(subopt_type == RPL_OPTION_PAD1) {
995 len = 2 + buffer[i + 1];
998 switch(subopt_type) {
999 case RPL_OPTION_TARGET:
1001 prefixlen = buffer[i + 3];
1002 if(prefixlen == 0) {
1006 if(prefixlen > 128) {
1007 LOG_ERR(
"Too large target prefix length %d\n", prefixlen);
1010 if(i + 4 + ((prefixlen + 7) / CHAR_BIT) > buffer_length) {
1011 LOG_ERR(
"Insufficient space to copy RPL Target of %d bits\n",
1015 memset(&prefix, 0,
sizeof(prefix));
1016 memcpy(&prefix, buffer + i + 4, (prefixlen + 7) / CHAR_BIT);
1018 case RPL_OPTION_TRANSIT:
1022 lifetime = buffer[i + 5];
1024 memcpy(&dao_parent_addr, buffer + i + 6, 16);
1030 LOG_INFO(
"DAO lifetime: %u, prefix length: %u prefix: ",
1031 (
unsigned)lifetime, (
unsigned)prefixlen);
1032 LOG_INFO_6ADDR(&prefix);
1033 LOG_INFO_(
", parent: ");
1034 LOG_INFO_6ADDR(&dao_parent_addr);
1037 if(lifetime == RPL_ZERO_LIFETIME) {
1038 LOG_DBG(
"No-Path DAO received\n");
1042 LOG_WARN(
"DAO failed to add link prefix: ");
1043 LOG_WARN_6ADDR(&prefix);
1044 LOG_WARN_(
", parent: ");
1045 LOG_WARN_6ADDR(&dao_parent_addr);
1051 if(flags & RPL_DAO_K_FLAG) {
1052 LOG_DBG(
"Sending DAO ACK\n");
1054 dao_ack_output(instance, &dao_sender_addr, sequence,
1055 RPL_DAO_ACK_UNCONDITIONAL_ACCEPT);
1064 uint8_t instance_id;
1067 LOG_INFO(
"Received a DAO from ");
1071 instance_id = UIP_ICMP_PAYLOAD[0];
1072 instance = rpl_get_instance(instance_id);
1073 if(instance == NULL) {
1074 LOG_INFO(
"Ignoring a DAO for an unknown RPL instance(%u)\n",
1079 if(RPL_IS_STORING(instance)) {
1080 dao_input_storing();
1081 }
else if(RPL_IS_NON_STORING(instance)) {
1082 dao_input_nonstoring();
1091handle_dao_retransmission(
void *ptr)
1093 rpl_parent_t *parent;
1094 uip_ipaddr_t prefix;
1098 if(parent == NULL || parent->dag == NULL || parent->dag->instance == NULL) {
1101 instance = parent->dag->instance;
1103 if(instance->my_dao_transmissions >= RPL_DAO_MAX_RETRANSMISSIONS) {
1105 if(instance->lifetime_unit == 0xffff && instance->default_lifetime == 0xff) {
1116 if(RPL_IS_STORING(instance) && instance->of->dao_ack_callback) {
1118 instance->of->dao_ack_callback(parent, RPL_DAO_ACK_TIMEOUT);
1126 LOG_INFO(
"will retransmit DAO - seq:%d trans:%d\n", instance->my_dao_seqno,
1127 instance->my_dao_transmissions);
1129 if(get_global_addr(&prefix) == 0) {
1134 RPL_DAO_RETRANSMISSION_TIMEOUT / 2 +
1135 (
random_rand() % (RPL_DAO_RETRANSMISSION_TIMEOUT / 2)),
1136 handle_dao_retransmission, parent);
1138 instance->my_dao_transmissions++;
1139 dao_output_target_seq(parent, &prefix,
1140 instance->default_lifetime, instance->my_dao_seqno);
1145dao_output(rpl_parent_t *parent, uint8_t lifetime)
1148 uip_ipaddr_t prefix;
1150 if(get_global_addr(&prefix) == 0) {
1151 LOG_ERR(
"No global address set for this node - suppressing DAO\n");
1155 if(parent == NULL || parent->dag == NULL || parent->dag->instance == NULL) {
1159 RPL_LOLLIPOP_INCREMENT(dao_sequence);
1164 if(lifetime != RPL_ZERO_LIFETIME) {
1166 instance = parent->dag->instance;
1168 instance->my_dao_seqno = dao_sequence;
1169 instance->my_dao_transmissions = 1;
1170 ctimer_set(&instance->dao_retransmit_timer, RPL_DAO_RETRANSMISSION_TIMEOUT,
1171 handle_dao_retransmission, parent);
1176 parent->dag->instance->has_downward_route = lifetime != RPL_ZERO_LIFETIME;
1180 dao_output_target(parent, &prefix, lifetime);
1184dao_output_target(rpl_parent_t *parent, uip_ipaddr_t *prefix, uint8_t lifetime)
1186 dao_output_target_seq(parent, prefix, lifetime, dao_sequence);
1190dao_output_target_seq(rpl_parent_t *parent, uip_ipaddr_t *prefix,
1191 uint8_t lifetime, uint8_t seq_no)
1195 unsigned char *buffer;
1198 uip_ipaddr_t *parent_ipaddr = NULL;
1199 uip_ipaddr_t *dest_ipaddr = NULL;
1208 if(parent == NULL) {
1209 LOG_ERR(
"dao_output_target error parent NULL\n");
1213 parent_ipaddr = rpl_parent_get_ipaddr(parent);
1214 if(parent_ipaddr == NULL) {
1215 LOG_ERR(
"dao_output_target error parent IP address NULL\n");
1221 LOG_ERR(
"dao_output_target error dag NULL\n");
1225 instance = dag->instance;
1227 if(instance == NULL) {
1228 LOG_ERR(
"dao_output_target error instance NULL\n");
1231 if(prefix == NULL) {
1232 LOG_ERR(
"dao_output_target error prefix NULL\n");
1235#ifdef RPL_DEBUG_DAO_OUTPUT
1236 RPL_DEBUG_DAO_OUTPUT(parent);
1239 buffer = UIP_ICMP_PAYLOAD;
1242 buffer[pos++] = instance->instance_id;
1244#if RPL_DAO_SPECIFY_DAG
1245 buffer[pos] |= RPL_DAO_D_FLAG;
1248 if(lifetime != RPL_ZERO_LIFETIME) {
1249 buffer[pos] |= RPL_DAO_K_FLAG;
1254 buffer[pos++] = seq_no;
1255#if RPL_DAO_SPECIFY_DAG
1256 memcpy(buffer + pos, &dag->dag_id,
sizeof(dag->dag_id));
1257 pos+=
sizeof(dag->dag_id);
1261 prefixlen =
sizeof(*prefix) * CHAR_BIT;
1262 buffer[pos++] = RPL_OPTION_TARGET;
1263 buffer[pos++] = 2 + ((prefixlen + 7) / CHAR_BIT);
1265 buffer[pos++] = prefixlen;
1266 memcpy(buffer + pos, prefix, (prefixlen + 7) / CHAR_BIT);
1267 pos += ((prefixlen + 7) / CHAR_BIT);
1270 buffer[pos++] = RPL_OPTION_TRANSIT;
1271 buffer[pos++] = (instance->mop != RPL_MOP_NON_STORING) ? 4 : 20;
1275 buffer[pos++] = lifetime;
1277 if(instance->mop != RPL_MOP_NON_STORING) {
1279 dest_ipaddr = parent_ipaddr;
1282 memcpy(buffer + pos, &parent->dag->dag_id, 8);
1284 memcpy(buffer + pos, ((
const unsigned char *)parent_ipaddr) + 8, 8);
1287 dest_ipaddr = &parent->dag->dag_id;
1290 LOG_INFO(
"Sending a %sDAO with sequence number %u, lifetime %u, prefix ",
1291 lifetime == RPL_ZERO_LIFETIME ?
"No-Path " :
"", seq_no, lifetime);
1293 LOG_INFO_6ADDR(prefix);
1295 LOG_INFO_6ADDR(dest_ipaddr);
1296 LOG_INFO_(
" , parent ");
1297 LOG_INFO_6ADDR(parent_ipaddr);
1300 if(dest_ipaddr != NULL) {
1311 uint8_t instance_id;
1315 rpl_parent_t *parent;
1317 buffer = UIP_ICMP_PAYLOAD;
1319 instance_id = buffer[0];
1320 sequence = buffer[2];
1323 instance = rpl_get_instance(instance_id);
1324 if(instance == NULL) {
1329 if(RPL_IS_STORING(instance)) {
1330 parent = rpl_find_parent(instance->current_dag, &
UIP_IP_BUF->srcipaddr);
1331 if(parent == NULL) {
1340 if(instance->current_dag->rank ==
ROOT_RANK(instance)) {
1341 LOG_DBG(
"DODAG root received a DAO ACK, ignoring it\n");
1346 LOG_INFO(
"Received a DAO %s with sequence number %d (%d) and status %d from ",
1347 status < 128 ?
"ACK" :
"NACK",
1348 sequence, instance->my_dao_seqno, status);
1352 if(sequence == instance->my_dao_seqno) {
1353 instance->has_downward_route = status < 128;
1359 if(RPL_IS_STORING(instance) && instance->of->dao_ack_callback) {
1360 instance->of->dao_ack_callback(parent, status);
1363#if RPL_REPAIR_ON_DAO_NACK
1364 if(status >= RPL_DAO_ACK_UNABLE_TO_ACCEPT) {
1373 }
else if(RPL_IS_STORING(instance)) {
1376 const uip_ipaddr_t *nexthop;
1377 if((re = find_route_entry_by_dao_ack(sequence)) != NULL) {
1380 RPL_ROUTE_CLEAR_DAO_PENDING(re);
1382 nexthop = uip_ds6_route_nexthop(re);
1383 if(nexthop == NULL) {
1384 LOG_WARN(
"No next hop to fwd DAO ACK to\n");
1386 LOG_INFO(
"Fwd DAO ACK to:");
1387 LOG_INFO_6ADDR(nexthop);
1389 buffer[2] = re->state.dao_seqno_in;
1393 if(status >= RPL_DAO_ACK_UNABLE_TO_ACCEPT) {
1395 uip_ds6_route_rm(re);
1398 LOG_WARN(
"No route entry found to forward DAO ACK (seqno %u)\n", sequence);
1406dao_ack_output(
rpl_instance_t *instance, uip_ipaddr_t *dest, uint8_t sequence,
1410 unsigned char *buffer;
1412 LOG_INFO(
"Sending a DAO %s with sequence number %d to ", status < 128 ?
"ACK" :
"NACK", sequence);
1413 LOG_INFO_6ADDR(dest);
1414 LOG_INFO_(
" with status %d\n", status);
1416 buffer = UIP_ICMP_PAYLOAD;
1418 buffer[0] = instance->instance_id;
1420 buffer[2] = sequence;
1428rpl_icmp6_register_handlers()
unsigned short random_rand(void)
Generates a new random number using the cc2538 RNG.
void ctimer_stop(struct ctimer *c)
Stop a pending callback timer.
void ctimer_set(struct ctimer *c, clock_time_t t, void(*f)(void *), void *ptr)
Set a callback timer.
#define uip_create_linklocal_rplnodes_mcast(addr)
Set IP address addr to the link-local, all-rpl-nodes multicast address.
#define RPL_LIFETIME(lifetime)
Compute lifetime, accounting for the lifetime unit.
#define DAG_RANK(fixpt_rank)
Return DAG RANK as per RFC 6550 (rank divided by min_hoprankinc)
void rpl_local_repair(const char *str)
Triggers a RPL local repair.
#define ROOT_RANK
Rank of a root node.
uip_mcast6_route_t * uip_mcast6_route_add(uip_ipaddr_t *group)
Add a multicast route.
void uip_sr_expire_parent(const void *graph, const uip_ipaddr_t *child, const uip_ipaddr_t *parent)
Expires a given child-parent link.
uip_ds6_nbr_t * uip_ds6_nbr_add(const uip_ipaddr_t *ipaddr, const uip_lladdr_t *lladdr, uint8_t isrouter, uint8_t state, nbr_table_reason_t reason, void *data)
Add a neighbor cache for a specified IPv6 address, which is associated with a specified link-layer ad...
void uip_icmp6_send(const uip_ipaddr_t *dest, int type, int code, int payload_len)
Send an icmpv6 message.
rpl_dag_t * rpl_get_any_dag(void)
Returns pointer to any DAG (for compatibility with legagy RPL code)
uip_ds6_nbr_t * uip_ds6_nbr_lookup(const uip_ipaddr_t *ipaddr)
Get the neighbor cache associated with a specified IPv6 address.
#define uip_is_addr_mcast(a)
is address a multicast address, see RFC 4291 a is of type uip_ipaddr_t*
uip_ds6_nbr_t * rpl_icmp6_update_nbr_table(uip_ipaddr_t *from, nbr_table_reason_t reason, void *data)
Updates IPv6 neighbor cache on incoming link-local RPL ICMPv6 messages.
enum rpl_mode rpl_get_mode(void)
Get the RPL mode.
#define uip_is_addr_linklocal(a)
is addr (a) a link local unicast address, see RFC 4291 i.e.
void rpl_process_dio(uip_ipaddr_t *from, rpl_dio_t *dio)
Processes incoming DIO.
#define uip_is_addr_mcast_global(a)
is address a global multicast address (FFxE::/16), a is of type uip_ip6addr_t*
void uip_icmp6_register_input_handler(uip_icmp6_input_handler_t *handler)
Register a handler which can handle a specific ICMPv6 message type.
uip_sr_node_t * uip_sr_update_node(void *graph, const uip_ipaddr_t *child, const uip_ipaddr_t *parent, uint32_t lifetime)
Updates a child-parent link.
uip_ds6_netif_t uip_ds6_if
The single interface.
#define UIP_IP_BUF
Direct access to IPv6 header.
#define uip_ipaddr_copy(dest, src)
Copy an IP address from one place to another.
uint16_t uip_len
The length of the packet in the uip_buf buffer.
Header file for the logging system.
Header file for the Packet buffer (packetbuf) management.
The default nbr_table entry (when UIP_DS6_NBR_MULTI_IPV6_ADDRS is disabled), that implements nbr cach...
An entry in the routing table.
An entry in the multicast routing table.
void * dag
Pointer to an rpl_dag_t struct.
uint32_t lifetime
Entry lifetime seconds.
Header for the Contiki/uIP interface.
Header file for IPv6-related data structures.
Header file for ICMPv6 message and error handing (RFC 4443)
This header file contains configuration directives for uIPv6 multicast support.
static uip_ds6_nbr_t * nbr
Pointer to llao option in uip_buf.
static uip_ds6_addr_t * addr
Pointer to a nbr cache entry.
Header file for IPv6 Neighbor discovery (RFC 4861)
Header file for the uIP TCP/IP stack.