void
tcpip_ipv6_output(void)
{
uip_ds6_nbr_t *nbr = NULL;
uip_ipaddr_t *nexthop;
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;
if(uip_ds6_is_addr_onlink(&UIP_IP_BUF->destipaddr)) {
nexthop = &UIP_IP_BUF->destipaddr;
} else {
uip_ds6_route_t* locrt;
locrt = uip_ds6_route_lookup(&UIP_IP_BUF->destipaddr);
if(locrt == NULL) {
if((nexthop = uip_ds6_defrt_choose()) == 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 {
nexthop = &locrt->nexthop;
}
#if TCPIP_CONF_ANNOTATE_TRANSMISSIONS
if(nexthop != NULL) {
printf("#L %u 1; red\n", nexthop->u8[sizeof(uip_ipaddr_t) - 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 */
if((nbr = uip_ds6_nbr_lookup(nexthop)) == 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 7.7.3 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(&nbr->lladdr);
#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(&nbr->lladdr);
}
#endif /*UIP_CONF_IPV6_QUEUE_PKT*/
uip_len = 0;
return;
}
}
/* Multicast IP destination address. */
tcpip_output(NULL);
uip_len = 0;
uip_ext_len = 0;
}
void
tcpip_ipv6_output(void)
{
uip_ds6_nbr_t *nbr = NULL;
uip_ipaddr_t *nexthop;
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_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) {
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 */
#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();
}
static int
eth_output(uip_lladdr_t * src, uip_lladdr_t * dest)
{
if(IS_BROADCAST_ADDR(dest)) {
LOG6LBR_PRINTF(PACKET, PF_OUT, "eth_output: broadcast\n");
} else {
LOG6LBR_LLADDR_PRINTF(PACKET, PF_OUT, dest, "eth_output: ");
}
//Packet filtering
//----------------
if(uip_len == 0) {
LOG6LBR_ERROR("eth_output: uip_len = 0\n");
return 0;
}
#if CETIC_6LBR_ETH_FILTER_RPL
//Filter out RPL (broadcast) traffic
if(UIP_IP_BUF->proto == UIP_PROTO_ICMP6 &&
UIP_ICMP_BUF->type == ICMP6_RPL) {
//LOG6LBR_PRINTF(PACKET, PF_OUT, "eth_output: Filtering out RPL traffic\n");
return 0;
}
#endif
//IP packet alteration
//--------------------
#if CETIC_6LBR_ROUTER
//Modify source address
if((nvm_data.mode & CETIC_MODE_REWRITE_ADDR_MASK) != 0
&& uip_is_addr_link_local(&UIP_IP_BUF->srcipaddr)
&& uip_ds6_is_my_addr(&UIP_IP_BUF->srcipaddr)) {
LOG6LBR_PRINTF(PACKET, PF_OUT, "eth_output: Update src address\n");
uip_ipaddr_copy(&UIP_IP_BUF->srcipaddr, ð_ip_local_addr);
}
#endif
#if CETIC_6LBR_SMARTBRIDGE
//Reset Hop Limit when in smart-bridge for NDP packets
//TODO: Is this still needed after #4467 ?
if(UIP_IP_BUF->proto == UIP_PROTO_ICMP6 &&
(UIP_ICMP_BUF->type == ICMP6_NS || UIP_ICMP_BUF->type == ICMP6_NA
|| UIP_ICMP_BUF->type == ICMP6_RS || UIP_ICMP_BUF->type == ICMP6_RA)) {
UIP_IP_BUF->ttl = 255;
}
#endif
#if CETIC_6LBR_SMARTBRIDGE || CETIC_6LBR_TRANSPARENTBRIDGE
//Remove ROUTER flag when in bridge mode
if(UIP_IP_BUF->proto == UIP_PROTO_ICMP6 && UIP_ICMP_BUF->type == ICMP6_NA) {
//LOG6LBR_PRINTF(PACKET, PF_OUT, "eth_output: Updating NA\n");
UIP_ND6_NA_BUF->flagsreserved &= ~UIP_ND6_NA_FLAG_ROUTER;
}
#endif
//Some IP packets have link layer in them, need to change them around!
mac_translateIPLinkLayer(ll_8023_type);
//IP header alteration
//--------------------
//Remove Hop-by-hop extension header
if(uip_ext_len > 0) {
extern void remove_ext_hdr(void);
uint8_t proto = *((uint8_t *) UIP_IP_BUF + 40);
remove_ext_hdr();
UIP_IP_BUF->proto = proto;
}
//Create packet header
//--------------------
//Packet type
BUF->type = uip_htons(UIP_ETHTYPE_IPV6);
//Destination address
if(IS_BROADCAST_ADDR(dest)) {
BUF->dest.addr[0] = 0x33;
BUF->dest.addr[1] = 0x33;
BUF->dest.addr[2] = UIP_IP_BUF->destipaddr.u8[12];
BUF->dest.addr[3] = UIP_IP_BUF->destipaddr.u8[13];
BUF->dest.addr[4] = UIP_IP_BUF->destipaddr.u8[14];
BUF->dest.addr[5] = UIP_IP_BUF->destipaddr.u8[15];
} else {
mac_createEthernetAddr(BUF->dest.addr, dest);
}
//Source address
if ( src != NULL ) {
mac_createEthernetAddr(BUF->src.addr, src);
} else {
memcpy(BUF->src.addr, eth_mac_addr, 6);
}
//Sending packet
//--------------
LOG6LBR_PRINTF(PACKET, PF_OUT, "eth_output: Sending packet to Ethernet\n");
eth_drv_send();
return 1;
}
void
tcpip_ipv6_output(void)
{
uip_ds6_nbr_t *nbr = NULL;
uip_ipaddr_t *nexthop;
uip_ds6_route_t *route = NULL;
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 {
/* 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 && UIP_CONF_IPV6_RPL
if (is_dodag_root() && 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 CETIC_6LBR && UIP_CONF_IPV6_RPL
/* Don't perform NUD if it has been disabled for WSN */
if((nvm_data.global_flags & CETIC_GLOBAL_DISABLE_WSN_NUD) != 0 &&
uip_ipaddr_prefixcmp(&wsn_net_prefix, &UIP_IP_BUF->destipaddr, 64) &&
route != NULL) {
uip_clear_buf();
return;
}
#endif
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 CETIC_6LBR && UIP_CONF_IPV6_RPL
/* Don't update nbr state if we don't want to perform NUD for WSN */
if((nvm_data.global_flags & CETIC_GLOBAL_DISABLE_WSN_NUD) == 0 ||
!uip_ipaddr_prefixcmp(&wsn_net_prefix, &UIP_IP_BUF->destipaddr, 64) ||
route == NULL)
#endif
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();
}
