void
tcpip_ipv6_output(void)
{
uip_ds6_nbr_t *nbr = NULL;
uip_ipaddr_t *nexthop = NULL;
if(uip_len == 0) {
return;
}
if(uip_len > UIP_LINK_MTU) {
UIP_LOG("tcpip_ipv6_output: Packet to big");
uip_clear_buf();
return;
}
if(uip_is_addr_unspecified(&UIP_IP_BUF->destipaddr)){
UIP_LOG("tcpip_ipv6_output: Destination address unspecified");
uip_clear_buf();
return;
}
#if UIP_CONF_IPV6_RPL
if(!rpl_update_header()) {
/* Packet can not be forwarded */
PRINTF("tcpip_ipv6_output: RPL header update error\n");
uip_clear_buf();
return;
}
#endif /* UIP_CONF_IPV6_RPL */
/* Let's go ahead and get the "best" parent. We'll use it for default (blind) sending. */
/*#if UIP_CONF_IPV6_RPL && RPL_CONF_OPP_ROUTING
if(!uip_is_addr_mcast(&UIP_IP_BUF->destipaddr) && !rpl_is_addr_opp(&UIP_IP_BUF->destipaddr)) {
#else*/
if(!uip_is_addr_mcast(&UIP_IP_BUF->destipaddr)) {
//#endif
/* Next hop determination */
#if UIP_CONF_IPV6_RPL && RPL_WITH_NON_STORING
uip_ipaddr_t ipaddr;
/* Look for a RPL Source Route */
if(rpl_srh_get_next_hop(&ipaddr)) {
nexthop = &ipaddr;
}
#endif /* UIP_CONF_IPV6_RPL && RPL_WITH_NON_STORING */
nbr = NULL;
/* We first check if the destination address is on our immediate
link. If so, we simply use the destination address as our
nexthop address. */
PRINTF("tcpip a %d\n", nexthop);
if(nexthop == NULL && uip_ds6_is_addr_onlink(&UIP_IP_BUF->destipaddr)){
nexthop = &UIP_IP_BUF->destipaddr;
PRINTF("tcpip b\n");
}
if(nexthop == NULL) {
uip_ds6_route_t *route;
/* Check if we have a route to the destination address. */
route = uip_ds6_route_lookup(&UIP_IP_BUF->destipaddr);
/* No route was found - we send to the default route instead. */
if(route == NULL) {
PRINTF("tcpip_ipv6_output: no route found, using default route\n");
nexthop = uip_ds6_defrt_choose();
if(nexthop == NULL) {
#ifdef UIP_FALLBACK_INTERFACE
PRINTF("FALLBACK: removing ext hdrs & setting proto %d %d\n",
uip_ext_len, *((uint8_t *)UIP_IP_BUF + 40));
if(uip_ext_len > 0) {
extern void remove_ext_hdr(void);
uint8_t proto = *((uint8_t *)UIP_IP_BUF + 40);
remove_ext_hdr();
/* This should be copied from the ext header... */
UIP_IP_BUF->proto = proto;
}
/* Inform the other end that the destination is not reachable. If it's
* not informed routes might get lost unexpectedly until there's a need
* to send a new packet to the peer */
if(UIP_FALLBACK_INTERFACE.output() < 0) {
PRINTF("FALLBACK: output error. Reporting DST UNREACH\n");
uip_icmp6_error_output(ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR, 0);
uip_flags = 0;
tcpip_ipv6_output();
return;
}
#else
PRINTF("tcpip_ipv6_output: Destination off-link but no route\n");
#endif /* !UIP_FALLBACK_INTERFACE */
uip_clear_buf();
return;
}
} else {
/* A route was found, so we look up the nexthop neighbor for
the route. */
nexthop = uip_ds6_route_nexthop(route);
/* If the nexthop is dead, for example because the neighbor
never responded to link-layer acks, we drop its route. */
if(nexthop == NULL) {
#if UIP_CONF_IPV6_RPL
/* If we are running RPL, and if we are the root of the
network, we'll trigger a global repair berfore we remove
the route. */
rpl_dag_t *dag;
rpl_instance_t *instance;
dag = (rpl_dag_t *)route->state.dag;
if(dag != NULL) {
instance = dag->instance;
rpl_repair_root(instance->instance_id);
}
#endif /* UIP_CONF_IPV6_RPL */
uip_ds6_route_rm(route);
/* We don't have a nexthop to send the packet to, so we drop
it. */
return;
}
}
#if TCPIP_CONF_ANNOTATE_TRANSMISSIONS
if(nexthop != NULL) {
static uint8_t annotate_last;
static uint8_t annotate_has_last = 0;
if(annotate_has_last) {
printf("#L %u 0; red\n", annotate_last);
}
printf("#L %u 1; red\n", nexthop->u8[sizeof(uip_ipaddr_t) - 1]);
annotate_last = nexthop->u8[sizeof(uip_ipaddr_t) - 1];
annotate_has_last = 1;
}
#endif /* TCPIP_CONF_ANNOTATE_TRANSMISSIONS */
}
/* End of next hop determination */
nbr = uip_ds6_nbr_lookup(nexthop);
if(nbr == NULL) {
#if UIP_ND6_SEND_NS
if((nbr = uip_ds6_nbr_add(nexthop, NULL, 0, NBR_INCOMPLETE, NBR_TABLE_REASON_IPV6_ND, NULL)) == NULL) {
uip_clear_buf();
PRINTF("tcpip_ipv6_output: failed to add neighbor to cache\n");
return;
} else {
#if UIP_CONF_IPV6_QUEUE_PKT
/* Copy outgoing pkt in the queuing buffer for later transmit. */
if(uip_packetqueue_alloc(&nbr->packethandle, UIP_DS6_NBR_PACKET_LIFETIME) != NULL) {
memcpy(uip_packetqueue_buf(&nbr->packethandle), UIP_IP_BUF, uip_len);
uip_packetqueue_set_buflen(&nbr->packethandle, uip_len);
}
#endif
/* RFC4861, 7.2.2:
* "If the source address of the packet prompting the solicitation is the
* same as one of the addresses assigned to the outgoing interface, that
* address SHOULD be placed in the IP Source Address of the outgoing
* solicitation. Otherwise, any one of the addresses assigned to the
* interface should be used."*/
if(uip_ds6_is_my_addr(&UIP_IP_BUF->srcipaddr)){
uip_nd6_ns_output(&UIP_IP_BUF->srcipaddr, NULL, &nbr->ipaddr);
} else {
uip_nd6_ns_output(NULL, NULL, &nbr->ipaddr);
}
stimer_set(&nbr->sendns, uip_ds6_if.retrans_timer / 1000);
nbr->nscount = 1;
/* Send the first NS try from here (multicast destination IP address). */
}
#else /* UIP_ND6_SEND_NS */
PRINTF("tcpip_ipv6_output: neighbor not in cache\n");
uip_len = 0;
return;
#endif /* UIP_ND6_SEND_NS */
} else {
#if UIP_ND6_SEND_NS
if(nbr->state == NBR_INCOMPLETE) {
PRINTF("tcpip_ipv6_output: nbr cache entry incomplete\n");
#if UIP_CONF_IPV6_QUEUE_PKT
/* Copy outgoing pkt in the queuing buffer for later transmit and set
the destination nbr to nbr. */
if(uip_packetqueue_alloc(&nbr->packethandle, UIP_DS6_NBR_PACKET_LIFETIME) != NULL) {
memcpy(uip_packetqueue_buf(&nbr->packethandle), UIP_IP_BUF, uip_len);
uip_packetqueue_set_buflen(&nbr->packethandle, uip_len);
}
#endif /*UIP_CONF_IPV6_QUEUE_PKT*/
uip_clear_buf();
return;
}
/* Send in parallel if we are running NUD (nbc state is either STALE,
DELAY, or PROBE). See RFC 4861, section 7.3.3 on node behavior. */
if(nbr->state == NBR_STALE) {
nbr->state = NBR_DELAY;
stimer_set(&nbr->reachable, UIP_ND6_DELAY_FIRST_PROBE_TIME);
nbr->nscount = 0;
PRINTF("tcpip_ipv6_output: nbr cache entry stale moving to delay\n");
}
#endif /* UIP_ND6_SEND_NS */
tcpip_output(uip_ds6_nbr_get_ll(nbr));
#if UIP_CONF_IPV6_QUEUE_PKT
/*
* Send the queued packets from here, may not be 100% perfect though.
* This happens in a few cases, for example when instead of receiving a
* NA after sendiong a NS, you receive a NS with SLLAO: the entry moves
* to STALE, and you must both send a NA and the queued packet.
*/
if(uip_packetqueue_buflen(&nbr->packethandle) != 0) {
uip_len = uip_packetqueue_buflen(&nbr->packethandle);
memcpy(UIP_IP_BUF, uip_packetqueue_buf(&nbr->packethandle), uip_len);
uip_packetqueue_free(&nbr->packethandle);
tcpip_output(uip_ds6_nbr_get_ll(nbr));
}
#endif /*UIP_CONF_IPV6_QUEUE_PKT*/
uip_clear_buf();
return;
}
}
/* Multicast IP destination address. */
tcpip_output(NULL);
uip_clear_buf();
}
/*---------------------------------------------------------------------------*/
uip_ds6_nbr_t *
uip_ds6_nbr_add(uip_ipaddr_t *ipaddr, uip_lladdr_t * lladdr,
uint8_t isrouter, uint8_t state)
{
int r;
r = uip_ds6_list_loop
((uip_ds6_element_t *)uip_ds6_nbr_cache, UIP_DS6_NBR_NB,
sizeof(uip_ds6_nbr_t), ipaddr, 128,
(uip_ds6_element_t **)&locnbr);
if(r == FREESPACE) {
locnbr->isused = 1;
uip_ipaddr_copy(&locnbr->ipaddr, ipaddr);
if(lladdr != NULL) {
memcpy(&locnbr->lladdr, lladdr, UIP_LLADDR_LEN);
} else {
memset(&locnbr->lladdr, 0, UIP_LLADDR_LEN);
}
locnbr->isrouter = isrouter;
locnbr->state = state;
#if UIP_CONF_IPV6_QUEUE_PKT
uip_packetqueue_new(&locnbr->packethandle);
#endif /* UIP_CONF_IPV6_QUEUE_PKT */
/* timers are set separately, for now we put them in expired state */
stimer_set(&locnbr->reachable, 0);
stimer_set(&locnbr->sendns, 0);
locnbr->nscount = 0;
PRINTF("Adding neighbor with ip addr ");
PRINT6ADDR(ipaddr);
PRINTF("link addr ");
PRINTLLADDR((&(locnbr->lladdr)));
PRINTF("state %u\n", state);
NEIGHBOR_STATE_CHANGED(locnbr);
locnbr->last_lookup = clock_time();
return locnbr;
} else if(r == NOSPACE) {
/* We did not find any empty slot on the neighbor list, so we need
to remove one old entry to make room. */
uip_ds6_nbr_t *n, *oldest;
clock_time_t oldest_time;
oldest = NULL;
oldest_time = clock_time();
for(n = uip_ds6_nbr_cache;
n < &uip_ds6_nbr_cache[UIP_DS6_NBR_NB];
n++) {
if(n->isused) {
if(n->last_lookup < oldest_time) {
oldest = n;
oldest_time = n->last_lookup;
}
}
}
if(oldest != NULL) {
uip_ds6_nbr_rm(oldest);
return uip_ds6_nbr_add(ipaddr, lladdr, isrouter, state);
}
}
PRINTF("uip_ds6_nbr_add drop\n");
return NULL;
}
void
tcpip_ipv6_output(void)
{
uip_ds6_nbr_t *nbr = NULL;
uip_ipaddr_t *nexthop;
if(uip_len == 0) {
return;
}
PRINTF("IPv6 packet send from ");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF(" to ");
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
PRINTF("\n");
if(uip_len > UIP_LINK_MTU) {
UIP_LOG("tcpip_ipv6_output: Packet to big");
uip_clear_buf();
return;
}
if(uip_is_addr_unspecified(&UIP_IP_BUF->destipaddr)){
UIP_LOG("tcpip_ipv6_output: Destination address unspecified");
uip_clear_buf();
return;
}
if(!uip_is_addr_mcast(&UIP_IP_BUF->destipaddr)) {
/* Next hop determination */
nbr = NULL;
/* We first check if the destination address is on our immediate
link. If so, we simply use the destination address as our
nexthop address. */
if(uip_ds6_is_addr_onlink(&UIP_IP_BUF->destipaddr)){
nexthop = &UIP_IP_BUF->destipaddr;
} else {
uip_ds6_route_t *route;
/* Check if we have a route to the destination address. */
route = uip_ds6_route_lookup(&UIP_IP_BUF->destipaddr);
/* No route was found - we send to the default route instead. */
if(route == NULL) {
#if CETIC_6LBR_SMARTBRIDGE
if (uip_ipaddr_prefixcmp(&wsn_net_prefix, &UIP_IP_BUF->destipaddr, 64)) {
/* In smart-bridge mode, there is no route towards hosts on the Ethernet side
Therefore we have to check the destination and assume the host is on-link */
nexthop = &UIP_IP_BUF->destipaddr;
} else
#endif
#if CETIC_6LBR_ROUTER
if (uip_ipaddr_prefixcmp(&wsn_net_prefix, &UIP_IP_BUF->destipaddr, 64)) {
//In router mode, we drop packets towards unknown mote
PRINTF("Dropping wsn packet with no route\n");
uip_len = 0;
return;
} else
#endif
#if CETIC_6LBR_IP64
if(ip64_addr_is_ip64(&UIP_IP_BUF->destipaddr)) {
#if UIP_CONF_IPV6_RPL
rpl_remove_header();
#endif
IP64_CONF_UIP_FALLBACK_INTERFACE.output();
uip_len = 0;
uip_ext_len = 0;
return;
}
else
#endif
{
PRINTF("tcpip_ipv6_output: no route found, using default route\n");
nexthop = uip_ds6_defrt_choose();
}
if(nexthop == NULL) {
#ifdef UIP_FALLBACK_INTERFACE
PRINTF("FALLBACK: removing ext hdrs & setting proto %d %d\n",
uip_ext_len, *((uint8_t *)UIP_IP_BUF + 40));
if(uip_ext_len > 0) {
extern void remove_ext_hdr(void);
uint8_t proto = *((uint8_t *)UIP_IP_BUF + 40);
remove_ext_hdr();
/* This should be copied from the ext header... */
UIP_IP_BUF->proto = proto;
}
UIP_FALLBACK_INTERFACE.output();
#else
PRINTF("tcpip_ipv6_output: Destination off-link but no route\n");
#endif /* !UIP_FALLBACK_INTERFACE */
uip_clear_buf();
return;
}
} else {
/* A route was found, so we look up the nexthop neighbor for
the route. */
nexthop = uip_ds6_route_nexthop(route);
/* If the nexthop is dead, for example because the neighbor
never responded to link-layer acks, we drop its route. */
if(nexthop == NULL) {
#if UIP_CONF_IPV6_RPL
/* If we are running RPL, and if we are the root of the
network, we'll trigger a DIO before we remove
the route. */
rpl_dag_t *dag;
dag = (rpl_dag_t *)route->state.dag;
if(dag != NULL) {
rpl_reset_dio_timer(dag->instance);
}
#endif /* UIP_CONF_IPV6_RPL */
uip_ds6_route_rm(route);
/* We don't have a nexthop to send the packet to, so we drop
it. */
return;
}
}
#if TCPIP_CONF_ANNOTATE_TRANSMISSIONS
if(nexthop != NULL) {
static uint8_t annotate_last;
static uint8_t annotate_has_last = 0;
if(annotate_has_last) {
printf("#L %u 0; red\n", annotate_last);
}
printf("#L %u 1; red\n", nexthop->u8[sizeof(uip_ipaddr_t) - 1]);
annotate_last = nexthop->u8[sizeof(uip_ipaddr_t) - 1];
annotate_has_last = 1;
}
#endif /* TCPIP_CONF_ANNOTATE_TRANSMISSIONS */
}
/* End of next hop determination */
#if UIP_CONF_IPV6_RPL
if(rpl_update_header_final(nexthop)) {
uip_clear_buf();
return;
}
#endif /* UIP_CONF_IPV6_RPL */
nbr = uip_ds6_nbr_lookup(nexthop);
if(nbr == NULL) {
#if UIP_ND6_SEND_NA
if((nbr = uip_ds6_nbr_add(nexthop, NULL, 0, NBR_INCOMPLETE)) == NULL) {
uip_clear_buf();
return;
} else {
#if UIP_CONF_IPV6_QUEUE_PKT
/* Copy outgoing pkt in the queuing buffer for later transmit. */
if(uip_packetqueue_alloc(&nbr->packethandle, UIP_DS6_NBR_PACKET_LIFETIME) != NULL) {
memcpy(uip_packetqueue_buf(&nbr->packethandle), UIP_IP_BUF, uip_len);
uip_packetqueue_set_buflen(&nbr->packethandle, uip_len);
}
#endif
/* RFC4861, 7.2.2:
* "If the source address of the packet prompting the solicitation is the
* same as one of the addresses assigned to the outgoing interface, that
* address SHOULD be placed in the IP Source Address of the outgoing
* solicitation. Otherwise, any one of the addresses assigned to the
* interface should be used."*/
if(uip_ds6_is_my_addr(&UIP_IP_BUF->srcipaddr)){
uip_nd6_ns_output(&UIP_IP_BUF->srcipaddr, NULL, &nbr->ipaddr);
} else {
uip_nd6_ns_output(NULL, NULL, &nbr->ipaddr);
}
stimer_set(&nbr->sendns, uip_ds6_if.retrans_timer / 1000);
nbr->nscount = 1;
/* Send the first NS try from here (multicast destination IP address). */
}
#else /* UIP_ND6_SEND_NA */
uip_len = 0;
return;
#endif /* UIP_ND6_SEND_NA */
} else {
#if UIP_ND6_SEND_NA
if(nbr->state == NBR_INCOMPLETE) {
PRINTF("tcpip_ipv6_output: nbr cache entry incomplete\n");
#if UIP_CONF_IPV6_QUEUE_PKT
/* Copy outgoing pkt in the queuing buffer for later transmit and set
the destination nbr to nbr. */
if(uip_packetqueue_alloc(&nbr->packethandle, UIP_DS6_NBR_PACKET_LIFETIME) != NULL) {
memcpy(uip_packetqueue_buf(&nbr->packethandle), UIP_IP_BUF, uip_len);
uip_packetqueue_set_buflen(&nbr->packethandle, uip_len);
}
#endif /*UIP_CONF_IPV6_QUEUE_PKT*/
uip_clear_buf();
return;
}
/* Send in parallel if we are running NUD (nbc state is either STALE,
DELAY, or PROBE). See RFC 4861, section 7.3.3 on node behavior. */
if(nbr->state == NBR_STALE) {
nbr->state = NBR_DELAY;
stimer_set(&nbr->reachable, UIP_ND6_DELAY_FIRST_PROBE_TIME);
nbr->nscount = 0;
PRINTF("tcpip_ipv6_output: nbr cache entry stale moving to delay\n");
}
#endif /* UIP_ND6_SEND_NA */
tcpip_output(uip_ds6_nbr_get_ll(nbr));
#if UIP_CONF_IPV6_QUEUE_PKT
/*
* Send the queued packets from here, may not be 100% perfect though.
* This happens in a few cases, for example when instead of receiving a
* NA after sendiong a NS, you receive a NS with SLLAO: the entry moves
* to STALE, and you must both send a NA and the queued packet.
*/
if(uip_packetqueue_buflen(&nbr->packethandle) != 0) {
uip_len = uip_packetqueue_buflen(&nbr->packethandle);
memcpy(UIP_IP_BUF, uip_packetqueue_buf(&nbr->packethandle), uip_len);
uip_packetqueue_free(&nbr->packethandle);
tcpip_output(uip_ds6_nbr_get_ll(nbr));
}
#endif /*UIP_CONF_IPV6_QUEUE_PKT*/
uip_clear_buf();
return;
}
}
/* Multicast IP destination address. */
tcpip_output(NULL);
uip_clear_buf();
}
void
tcpip_ipv6_output(void)
{
uip_ds6_nbr_t *nbr = NULL;
uip_ipaddr_t *nexthop = NULL;
#if WITH_ORPL
rimeaddr_t *anycast_addr = NULL;
#endif /* WITH_ORPL */
if(uip_len == 0) {
return;
}
if(uip_len > UIP_LINK_MTU) {
UIP_LOG("tcpip_ipv6_output: Packet to big");
uip_len = 0;
return;
}
if(uip_is_addr_unspecified(&UIP_IP_BUF->destipaddr)){
UIP_LOG("tcpip_ipv6_output: Destination address unspecified");
uip_len = 0;
return;
}
if(!uip_is_addr_mcast(&UIP_IP_BUF->destipaddr)) {
/* Next hop determination */
nbr = NULL;
/* We first check if the destination address is on our immediate
link. If so, we simply use the destination address as our
nexthop address. */
if(uip_ds6_is_addr_onlink(&UIP_IP_BUF->destipaddr)){
nexthop = &UIP_IP_BUF->destipaddr;
} else {
#if !WITH_ORPL
uip_ds6_route_t *route;
/* Check if we have a route to the destination address. */
route = uip_ds6_route_lookup(&UIP_IP_BUF->destipaddr);
/* No route was found - we send to the default route instead. */
if(route == NULL) {
PRINTF("tcpip_ipv6_output: no route found, using default route\n");
nexthop = uip_ds6_defrt_choose();
if(nexthop == NULL) {
#ifdef UIP_FALLBACK_INTERFACE
PRINTF("FALLBACK: removing ext hdrs & setting proto %d %d\n",
uip_ext_len, *((uint8_t *)UIP_IP_BUF + 40));
if(uip_ext_len > 0) {
extern void remove_ext_hdr(void);
uint8_t proto = *((uint8_t *)UIP_IP_BUF + 40);
remove_ext_hdr();
/* This should be copied from the ext header... */
UIP_IP_BUF->proto = proto;
}
UIP_FALLBACK_INTERFACE.output();
#else
PRINTF("tcpip_ipv6_output: Destination off-link but no route\n");
#endif /* !UIP_FALLBACK_INTERFACE */
uip_len = 0;
return;
}
} else {
/* A route was found, so we look up the nexthop neighbor for
the route. */
nexthop = uip_ds6_route_nexthop(route);
/* If the nexthop is dead, for example because the neighbor
never responded to link-layer acks, we drop its route. */
if(nexthop == NULL) {
#if UIP_CONF_IPV6_RPL
/* If we are running RPL, and if we are the root of the
network, we'll trigger a global repair berfore we remove
the route. */
rpl_dag_t *dag;
rpl_instance_t *instance;
dag = (rpl_dag_t *)route->state.dag;
if(dag != NULL) {
instance = dag->instance;
rpl_repair_root(instance->instance_id);
}
#endif /* UIP_CONF_RPL */
uip_ds6_route_rm(route);
/* We don't have a nexthop to send the packet to, so we drop
it. */
return;
}
}
#else /* !WITH_ORPL */
/* Set anycast MAC address instead of routing */
/* Get ORPL seqno as set by application */
uint32_t seqno = orpl_get_curr_seqno();
if(seqno == 0) { /* We are not originator of the data, set
seqno of packet being forwarded */
seqno = orpl_packetbuf_seqno();
}
orpl_set_curr_seqno(seqno);
if(orpl_is_reachable_neighbor(&UIP_IP_BUF->destipaddr)) {
ORPL_LOG_FROM_UIP("Tcpip: fw to nbr");
anycast_addr = &anycast_addr_nbr;
} else if(orpl_routing_set_contains(&UIP_IP_BUF->destipaddr) && !orpl_blacklist_contains(seqno)) {
ORPL_LOG_FROM_UIP("Tcpip: fw down");
anycast_addr = &anycast_addr_down;
} else if(orpl_is_root() == 0){
ORPL_LOG_FROM_UIP("Tcpip: fw up");
anycast_addr = &anycast_addr_up;
} else { /* We are the root and need to route upwards =>
use fallback interface. */
#ifdef UIP_FALLBACK_INTERFACE
PRINTF("FALLBACK: removing ext hdrs & setting proto %d %d\n",
uip_ext_len, *((uint8_t *)UIP_IP_BUF + 40));
if(uip_ext_len > 0) {
uint8_t proto = *((uint8_t *)UIP_IP_BUF + 40);
remove_ext_hdr();
/* This should be copied from the ext header... */
UIP_IP_BUF->proto = proto;
}
UIP_FALLBACK_INTERFACE.output();
#else
PRINTF("tcpip_ipv6_output: Destination off-link but no route\n");
#endif /* !UIP_FALLBACK_INTERFACE */
uip_len = 0;
return;
}
if(anycast_addr == &anycast_addr_up || anycast_addr == &anycast_addr_down || anycast_addr == &anycast_addr_nbr) {
tcpip_output((uip_lladdr_t *)anycast_addr);
uip_len = 0;
return;
}
#endif /* !WITH_ORPL */
#if TCPIP_CONF_ANNOTATE_TRANSMISSIONS
if(nexthop != NULL) {
static uint8_t annotate_last;
static uint8_t annotate_has_last = 0;
if(annotate_has_last) {
printf("#L %u 0; red\n", annotate_last);
}
printf("#L %u 1; red\n", nexthop->u8[sizeof(uip_ipaddr_t) - 1]);
annotate_last = nexthop->u8[sizeof(uip_ipaddr_t) - 1];
annotate_has_last = 1;
}
#endif /* TCPIP_CONF_ANNOTATE_TRANSMISSIONS */
}
/* End of next hop determination */
#if UIP_CONF_IPV6_RPL
if(rpl_update_header_final(nexthop)) {
uip_len = 0;
return;
}
#endif /* UIP_CONF_IPV6_RPL */
nbr = uip_ds6_nbr_lookup(nexthop);
if(nbr == NULL) {
#if UIP_ND6_SEND_NA
if((nbr = uip_ds6_nbr_add(nexthop, NULL, 0, NBR_INCOMPLETE)) == NULL) {
uip_len = 0;
return;
} else {
#if UIP_CONF_IPV6_QUEUE_PKT
/* Copy outgoing pkt in the queuing buffer for later transmit. */
if(uip_packetqueue_alloc(&nbr->packethandle, UIP_DS6_NBR_PACKET_LIFETIME) != NULL) {
memcpy(uip_packetqueue_buf(&nbr->packethandle), UIP_IP_BUF, uip_len);
uip_packetqueue_set_buflen(&nbr->packethandle, uip_len);
}
#endif
/* RFC4861, 7.2.2:
* "If the source address of the packet prompting the solicitation is the
* same as one of the addresses assigned to the outgoing interface, that
* address SHOULD be placed in the IP Source Address of the outgoing
* solicitation. Otherwise, any one of the addresses assigned to the
* interface should be used."*/
if(uip_ds6_is_my_addr(&UIP_IP_BUF->srcipaddr)){
uip_nd6_ns_output(&UIP_IP_BUF->srcipaddr, NULL, &nbr->ipaddr);
} else {
uip_nd6_ns_output(NULL, NULL, &nbr->ipaddr);
}
stimer_set(&nbr->sendns, uip_ds6_if.retrans_timer / 1000);
nbr->nscount = 1;
}
#endif /* UIP_ND6_SEND_NA */
} else {
#if UIP_ND6_SEND_NA
if(nbr->state == NBR_INCOMPLETE) {
PRINTF("tcpip_ipv6_output: nbr cache entry incomplete\n");
#if UIP_CONF_IPV6_QUEUE_PKT
/* Copy outgoing pkt in the queuing buffer for later transmit and set
the destination nbr to nbr. */
if(uip_packetqueue_alloc(&nbr->packethandle, UIP_DS6_NBR_PACKET_LIFETIME) != NULL) {
memcpy(uip_packetqueue_buf(&nbr->packethandle), UIP_IP_BUF, uip_len);
uip_packetqueue_set_buflen(&nbr->packethandle, uip_len);
}
#endif /*UIP_CONF_IPV6_QUEUE_PKT*/
uip_len = 0;
return;
}
/* Send in parallel if we are running NUD (nbc state is either STALE,
DELAY, or PROBE). See RFC 4861, section 7.3.3 on node behavior. */
if(nbr->state == NBR_STALE) {
nbr->state = NBR_DELAY;
stimer_set(&nbr->reachable, UIP_ND6_DELAY_FIRST_PROBE_TIME);
nbr->nscount = 0;
PRINTF("tcpip_ipv6_output: nbr cache entry stale moving to delay\n");
}
#endif /* UIP_ND6_SEND_NA */
tcpip_output(uip_ds6_nbr_get_ll(nbr));
#if UIP_CONF_IPV6_QUEUE_PKT
/*
* Send the queued packets from here, may not be 100% perfect though.
* This happens in a few cases, for example when instead of receiving a
* NA after sendiong a NS, you receive a NS with SLLAO: the entry moves
* to STALE, and you must both send a NA and the queued packet.
*/
if(uip_packetqueue_buflen(&nbr->packethandle) != 0) {
uip_len = uip_packetqueue_buflen(&nbr->packethandle);
memcpy(UIP_IP_BUF, uip_packetqueue_buf(&nbr->packethandle), uip_len);
uip_packetqueue_free(&nbr->packethandle);
tcpip_output(uip_ds6_nbr_get_ll(nbr));
}
#endif /*UIP_CONF_IPV6_QUEUE_PKT*/
uip_len = 0;
return;
}
return;
}
/* Multicast IP destination address. */
tcpip_output(NULL);
uip_len = 0;
uip_ext_len = 0;
}
/*---------------------------------------------------------------------------*/
void
uip_nd6_ra_input(void)
{
PRINTF("Received RA from");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF("to");
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
PRINTF("\n");
UIP_STAT(++uip_stat.nd6.recv);
#if UIP_CONF_IPV6_CHECKS
if((UIP_IP_BUF->ttl != UIP_ND6_HOP_LIMIT) ||
(!uip_is_addr_link_local(&UIP_IP_BUF->srcipaddr)) ||
(UIP_ICMP_BUF->icode != 0)) {
PRINTF("RA received is bad");
goto discard;
}
#endif /*UIP_CONF_IPV6_CHECKS */
if(UIP_ND6_RA_BUF->cur_ttl != 0) {
uip_ds6_if.cur_hop_limit = UIP_ND6_RA_BUF->cur_ttl;
PRINTF("uip_ds6_if.cur_hop_limit %u\n", uip_ds6_if.cur_hop_limit);
}
if(UIP_ND6_RA_BUF->reachable_time != 0) {
if(uip_ds6_if.base_reachable_time !=
uip_ntohl(UIP_ND6_RA_BUF->reachable_time)) {
uip_ds6_if.base_reachable_time = uip_ntohl(UIP_ND6_RA_BUF->reachable_time);
uip_ds6_if.reachable_time = uip_ds6_compute_reachable_time();
}
}
if(UIP_ND6_RA_BUF->retrans_timer != 0) {
uip_ds6_if.retrans_timer = uip_ntohl(UIP_ND6_RA_BUF->retrans_timer);
}
/* Options processing */
nd6_opt_offset = UIP_ND6_RA_LEN;
while(uip_l3_icmp_hdr_len + nd6_opt_offset < uip_len) {
if(UIP_ND6_OPT_HDR_BUF->len == 0) {
PRINTF("RA received is bad");
goto discard;
}
switch (UIP_ND6_OPT_HDR_BUF->type) {
case UIP_ND6_OPT_SLLAO:
PRINTF("Processing SLLAO option in RA\n");
nd6_opt_llao = (uint8_t *) UIP_ND6_OPT_HDR_BUF;
nbr = uip_ds6_nbr_lookup(&UIP_IP_BUF->srcipaddr);
if(nbr == NULL) {
nbr = uip_ds6_nbr_add(&UIP_IP_BUF->srcipaddr,
(uip_lladdr_t *)&nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET],
1, NBR_STALE);
} else {
if(nbr->state == NBR_INCOMPLETE) {
nbr->state = NBR_STALE;
}
if(memcmp(&nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET],
&nbr->lladdr, UIP_LLADDR_LEN) != 0) {
memcpy(&nbr->lladdr, &nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET],
UIP_LLADDR_LEN);
nbr->state = NBR_STALE;
}
nbr->isrouter = 1;
}
break;
case UIP_ND6_OPT_MTU:
PRINTF("Processing MTU option in RA\n");
uip_ds6_if.link_mtu =
uip_ntohl(((uip_nd6_opt_mtu *) UIP_ND6_OPT_HDR_BUF)->mtu);
break;
case UIP_ND6_OPT_PREFIX_INFO:
PRINTF("Processing PREFIX option in RA\n");
nd6_opt_prefix_info = (uip_nd6_opt_prefix_info *) UIP_ND6_OPT_HDR_BUF;
if((uip_ntohl(nd6_opt_prefix_info->validlt) >=
uip_ntohl(nd6_opt_prefix_info->preferredlt))
&& (!uip_is_addr_link_local(&nd6_opt_prefix_info->prefix))) {
/* on-link flag related processing */
if(nd6_opt_prefix_info->flagsreserved1 & UIP_ND6_RA_FLAG_ONLINK) {
prefix =
uip_ds6_prefix_lookup(&nd6_opt_prefix_info->prefix,
nd6_opt_prefix_info->preflen);
if(prefix == NULL) {
if(nd6_opt_prefix_info->validlt != 0) {
if(nd6_opt_prefix_info->validlt != UIP_ND6_INFINITE_LIFETIME) {
prefix = uip_ds6_prefix_add(&nd6_opt_prefix_info->prefix,
nd6_opt_prefix_info->preflen,
uip_ntohl(nd6_opt_prefix_info->
validlt));
} else {
prefix = uip_ds6_prefix_add(&nd6_opt_prefix_info->prefix,
nd6_opt_prefix_info->preflen, 0);
}
}
} else {
switch (nd6_opt_prefix_info->validlt) {
case 0:
uip_ds6_prefix_rm(prefix);
break;
case UIP_ND6_INFINITE_LIFETIME:
prefix->isinfinite = 1;
break;
default:
PRINTF("Updating timer of prefix");
PRINT6ADDR(&prefix->ipaddr);
PRINTF("new value %lu\n", uip_ntohl(nd6_opt_prefix_info->validlt));
stimer_set(&prefix->vlifetime,
uip_ntohl(nd6_opt_prefix_info->validlt));
prefix->isinfinite = 0;
break;
}
}
}
/* End of on-link flag related processing */
/* autonomous flag related processing */
if((nd6_opt_prefix_info->flagsreserved1 & UIP_ND6_RA_FLAG_AUTONOMOUS)
&& (nd6_opt_prefix_info->validlt != 0)
&& (nd6_opt_prefix_info->preflen == UIP_DEFAULT_PREFIX_LEN)) {
uip_ipaddr_copy(&ipaddr, &nd6_opt_prefix_info->prefix);
uip_ds6_set_addr_iid(&ipaddr, &uip_lladdr);
addr = uip_ds6_addr_lookup(&ipaddr);
if((addr != NULL) && (addr->type == ADDR_AUTOCONF)) {
if(nd6_opt_prefix_info->validlt != UIP_ND6_INFINITE_LIFETIME) {
/* The processing below is defined in RFC4862 section 5.5.3 e */
if((uip_ntohl(nd6_opt_prefix_info->validlt) > 2 * 60 * 60) ||
(uip_ntohl(nd6_opt_prefix_info->validlt) >
stimer_remaining(&addr->vlifetime))) {
PRINTF("Updating timer of address");
PRINT6ADDR(&addr->ipaddr);
PRINTF("new value %lu\n",
uip_ntohl(nd6_opt_prefix_info->validlt));
stimer_set(&addr->vlifetime,
uip_ntohl(nd6_opt_prefix_info->validlt));
} else {
stimer_set(&addr->vlifetime, 2 * 60 * 60);
PRINTF("Updating timer of address ");
PRINT6ADDR(&addr->ipaddr);
PRINTF("new value %lu\n", (unsigned long)(2 * 60 * 60));
}
addr->isinfinite = 0;
} else {
addr->isinfinite = 1;
}
} else {
if(uip_ntohl(nd6_opt_prefix_info->validlt) ==
UIP_ND6_INFINITE_LIFETIME) {
uip_ds6_addr_add(&ipaddr, 0, ADDR_AUTOCONF);
} else {
uip_ds6_addr_add(&ipaddr, uip_ntohl(nd6_opt_prefix_info->validlt),
ADDR_AUTOCONF);
}
}
}
/* End of autonomous flag related processing */
}
break;
default:
PRINTF("ND option not supported in RA");
break;
}
nd6_opt_offset += (UIP_ND6_OPT_HDR_BUF->len << 3);
}
defrt = uip_ds6_defrt_lookup(&UIP_IP_BUF->srcipaddr);
if(UIP_ND6_RA_BUF->router_lifetime != 0) {
if(nbr != NULL) {
nbr->isrouter = 1;
}
if(defrt == NULL) {
uip_ds6_defrt_add(&UIP_IP_BUF->srcipaddr,
(unsigned
long)(uip_ntohs(UIP_ND6_RA_BUF->router_lifetime)));
} else {
stimer_set(&(defrt->lifetime),
(unsigned long)(uip_ntohs(UIP_ND6_RA_BUF->router_lifetime)));
}
} else {
if(defrt != NULL) {
uip_ds6_defrt_rm(defrt);
}
}
#if UIP_CONF_IPV6_QUEUE_PKT
/* If the nbr just became reachable (e.g. it was in NBR_INCOMPLETE state
* and we got a SLLAO), check if we had buffered a pkt for it */
/* if((nbr != NULL) && (nbr->queue_buf_len != 0)) {
uip_len = nbr->queue_buf_len;
memcpy(UIP_IP_BUF, nbr->queue_buf, uip_len);
nbr->queue_buf_len = 0;
return;
}*/
if(nbr != NULL && uip_packetqueue_buflen(&nbr->packethandle) != 0) {
uip_len = uip_packetqueue_buflen(&nbr->packethandle);
memcpy(UIP_IP_BUF, uip_packetqueue_buf(&nbr->packethandle), uip_len);
uip_packetqueue_free(&nbr->packethandle);
return;
}
#endif /*UIP_CONF_IPV6_QUEUE_PKT */
discard:
uip_len = 0;
return;
}
/*---------------------------------------------------------------------------*/
void
uip_nd6_rs_input(void)
{
PRINTF("Received RS from");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF("to");
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
PRINTF("\n");
UIP_STAT(++uip_stat.nd6.recv);
#if UIP_CONF_IPV6_CHECKS
/*
* Check hop limit / icmp code
* target address must not be multicast
* if the NA is solicited, dest must not be multicast
*/
if((UIP_IP_BUF->ttl != UIP_ND6_HOP_LIMIT) || (UIP_ICMP_BUF->icode != 0)) {
PRINTF("RS received is bad\n");
goto discard;
}
#endif /*UIP_CONF_IPV6_CHECKS */
/* Only valid option is Source Link-Layer Address option any thing
else is discarded */
nd6_opt_offset = UIP_ND6_RS_LEN;
nd6_opt_llao = NULL;
while(uip_l3_icmp_hdr_len + nd6_opt_offset < uip_len) {
#if UIP_CONF_IPV6_CHECKS
if(UIP_ND6_OPT_HDR_BUF->len == 0) {
PRINTF("RS received is bad\n");
goto discard;
}
#endif /*UIP_CONF_IPV6_CHECKS */
switch (UIP_ND6_OPT_HDR_BUF->type) {
case UIP_ND6_OPT_SLLAO:
nd6_opt_llao = UIP_ND6_OPT_HDR_BUF;
break;
default:
PRINTF("ND option not supported in RS\n");
break;
}
nd6_opt_offset += (UIP_ND6_OPT_HDR_BUF->len << 3);
}
/* Options processing: only SLLAO */
if(nd6_opt_llao != NULL) {
#if UIP_CONF_IPV6_CHECKS
if(uip_is_addr_unspecified(&UIP_IP_BUF->srcipaddr)) {
PRINTF("RS received is bad\n");
goto discard;
} else {
#endif /*UIP_CONF_IPV6_CHECKS */
if((nbr = uip_ds6_nbr_lookup(&UIP_IP_BUF->srcipaddr)) == NULL) {
/* we need to add the neighbor */
uip_ds6_nbr_add(&UIP_IP_BUF->srcipaddr,
&nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET], 0, NBR_STALE);
} else {
/* If LL address changed, set neighbor state to stale */
if(memcmp(&nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET],
&nbr->lladdr, UIP_LLADDR_LEN) != 0) {
memcpy(&nbr->lladdr, &nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET],
UIP_LLADDR_LEN);
nbr->state = NBR_STALE;
}
nbr->isrouter = 0;
}
#if UIP_CONF_IPV6_CHECKS
}
#endif /*UIP_CONF_IPV6_CHECKS */
}
/* Schedule a sollicited RA */
uip_ds6_send_ra_sollicited();
discard:
uip_len = 0;
return;
}
void
uip_nd6_ns_input(void)
{
PRINTF("Received NS from");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF("to");
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
PRINTF("with target address");
PRINT6ADDR((uip_ipaddr_t *) (&UIP_ND6_NS_BUF->tgtipaddr));
PRINTF("\n");
UIP_STAT(++uip_stat.nd6.recv);
u8_t flags;
#if UIP_CONF_IPV6_CHECKS
if((UIP_IP_BUF->ttl != UIP_ND6_HOP_LIMIT) ||
(uip_is_addr_mcast(&UIP_ND6_NS_BUF->tgtipaddr)) ||
(UIP_ICMP_BUF->icode != 0)) {
PRINTF("NS received is bad\n");
goto discard;
}
#endif /* UIP_CONF_IPV6_CHECKS */
/* Options processing */
nd6_opt_llao = NULL;
nd6_opt_offset = UIP_ND6_NS_LEN;
while(uip_l3_icmp_hdr_len + nd6_opt_offset < uip_len) {
#if UIP_CONF_IPV6_CHECKS
if(UIP_ND6_OPT_HDR_BUF->len == 0) {
PRINTF("NS received is bad\n");
goto discard;
}
#endif /* UIP_CONF_IPV6_CHECKS */
switch (UIP_ND6_OPT_HDR_BUF->type) {
case UIP_ND6_OPT_SLLAO:
nd6_opt_llao = &uip_buf[uip_l2_l3_icmp_hdr_len + nd6_opt_offset];
#if UIP_CONF_IPV6_CHECKS
/* There must be NO option in a DAD NS */
if(uip_is_addr_unspecified(&UIP_IP_BUF->srcipaddr)) {
PRINTF("NS received is bad\n");
goto discard;
} else {
#endif /*UIP_CONF_IPV6_CHECKS */
nbr = uip_ds6_nbr_lookup(&UIP_IP_BUF->srcipaddr);
if(nbr == NULL) {
uip_ds6_nbr_add(&UIP_IP_BUF->srcipaddr,
(uip_lladdr_t *)&nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET],
0, NBR_STALE);
} else {
if(memcmp(&nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET],
&nbr->lladdr, UIP_LLADDR_LEN) != 0) {
memcpy(&nbr->lladdr, &nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET],
UIP_LLADDR_LEN);
nbr->state = NBR_STALE;
} else {
if(nbr->state == NBR_INCOMPLETE) {
nbr->state = NBR_STALE;
}
}
}
#if UIP_CONF_IPV6_CHECKS
}
#endif /*UIP_CONF_IPV6_CHECKS */
break;
default:
PRINTF("ND option not supported in NS");
break;
}
nd6_opt_offset += (UIP_ND6_OPT_HDR_BUF->len << 3);
}
addr = uip_ds6_addr_lookup(&UIP_ND6_NS_BUF->tgtipaddr);
if(addr != NULL) {
if(uip_is_addr_unspecified(&UIP_IP_BUF->srcipaddr)) {
/* DAD CASE */
#if UIP_CONF_IPV6_CHECKS
if(!uip_is_addr_solicited_node(&UIP_IP_BUF->destipaddr)) {
PRINTF("NS received is bad\n");
goto discard;
}
#endif /* UIP_CONF_IPV6_CHECKS */
if(addr->state != ADDR_TENTATIVE) {
uip_create_linklocal_allnodes_mcast(&UIP_IP_BUF->destipaddr);
uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
flags = UIP_ND6_NA_FLAG_OVERRIDE;
goto create_na;
} else {
/** \todo if I sent a NS before him, I win */
uip_ds6_dad_failed(addr);
goto discard;
}
}
#if UIP_CONF_IPV6_CHECKS
if(uip_ds6_is_my_addr(&UIP_IP_BUF->srcipaddr)) {
/**
* \NOTE do we do something here? we both are using the same address.
* If we are doing dad, we could cancel it, though we should receive a
* NA in response of DAD NS we sent, hence DAD will fail anyway. If we
* were not doing DAD, it means there is a duplicate in the network!
*/
PRINTF("NS received is bad\n");
goto discard;
}
#endif /*UIP_CONF_IPV6_CHECKS */
/* Address resolution case */
if(uip_is_addr_solicited_node(&UIP_IP_BUF->destipaddr)) {
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &UIP_IP_BUF->srcipaddr);
uip_ipaddr_copy(&UIP_IP_BUF->srcipaddr, &UIP_ND6_NS_BUF->tgtipaddr);
flags = UIP_ND6_NA_FLAG_SOLICITED | UIP_ND6_NA_FLAG_OVERRIDE;
goto create_na;
}
/* NUD CASE */
if(uip_ds6_addr_lookup(&UIP_IP_BUF->destipaddr) == addr) {
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &UIP_IP_BUF->srcipaddr);
uip_ipaddr_copy(&UIP_IP_BUF->srcipaddr, &UIP_ND6_NS_BUF->tgtipaddr);
flags = UIP_ND6_NA_FLAG_SOLICITED | UIP_ND6_NA_FLAG_OVERRIDE;
goto create_na;
} else {
#if UIP_CONF_IPV6_CHECKS
PRINTF("NS received is bad\n");
goto discard;
#endif /* UIP_CONF_IPV6_CHECKS */
}
} else {
goto discard;
}
create_na:
uip_ext_len = 0;
UIP_IP_BUF->vtc = 0x60;
UIP_IP_BUF->tcflow = 0;
UIP_IP_BUF->flow = 0;
UIP_IP_BUF->len[0] = 0; /* length will not be more than 255 */
UIP_IP_BUF->len[1] = UIP_ICMPH_LEN + UIP_ND6_NA_LEN + UIP_ND6_OPT_LLAO_LEN;
UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
UIP_IP_BUF->ttl = UIP_ND6_HOP_LIMIT;
UIP_ICMP_BUF->type = ICMP6_NA;
UIP_ICMP_BUF->icode = 0;
UIP_ND6_NA_BUF->flagsreserved = flags;
memcpy(&UIP_ND6_NA_BUF->tgtipaddr, &addr->ipaddr, sizeof(uip_ipaddr_t));
create_llao(&uip_buf[uip_l2_l3_icmp_hdr_len + UIP_ND6_NA_LEN],
UIP_ND6_OPT_TLLAO);
UIP_ICMP_BUF->icmpchksum = 0;
UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
uip_len =
UIP_IPH_LEN + UIP_ICMPH_LEN + UIP_ND6_NA_LEN + UIP_ND6_OPT_LLAO_LEN;
UIP_STAT(++uip_stat.nd6.sent);
PRINTF("Sending NA to");
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
PRINTF("from");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF("with target address");
PRINT6ADDR(&UIP_ND6_NA_BUF->tgtipaddr);
PRINTF("\n");
return;
discard:
uip_len = 0;
return;
}
