uip-ds6-nbr: introduce UIP_DS6_NBR_MULTI_IPV6_ADDRS
This feature, which is disabled by default, extends the neighbor cache management in order to have multiple IPv6 address associated with a single link-layer address as neighbor caches. To use this feature, set 1 to UIP_DS6_NBR_CONF_MAX_NEIGHBOR_CACHES.
This commit is contained in:
Yasuyuki Tanaka
Yasuyuki Tanaka
parent
8ef5c8b8c6
commit
ee452b5287
@ -55,19 +55,40 @@
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#include "net/ipv6/uip-nd6.h"
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#include "net/routing/routing.h"
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#if UIP_DS6_NBR_MULTI_IPV6_ADDRS
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#include "lib/memb.h"
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#endif /* UIP_DS6_NBR_MULTI_IPV6_ADDRS */
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/* Log configuration */
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#include "sys/log.h"
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#define LOG_MODULE "IPv6 Nbr"
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#define LOG_LEVEL LOG_LEVEL_IPV6
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#if UIP_DS6_NBR_MULTI_IPV6_ADDRS
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static void add_uip_ds6_nbr_to_nbr_entry(uip_ds6_nbr_t *nbr,
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uip_ds6_nbr_entry_t *nbr_entry);
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static void remove_uip_ds6_nbr_from_nbr_entry(uip_ds6_nbr_t *nbr);
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static void remove_nbr_entry(uip_ds6_nbr_entry_t *nbr_entry);
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static void free_uip_ds6_nbr(uip_ds6_nbr_t *nbr);
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static void callback_nbr_entry_removal(uip_ds6_nbr_entry_t *nbr_entry);
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NBR_TABLE(uip_ds6_nbr_entry_t, uip_ds6_nbr_entries);
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MEMB(uip_ds6_nbr_memb, uip_ds6_nbr_t, UIP_DS6_NBR_MAX_NEIGHBOR_CACHES);
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#else
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NBR_TABLE(uip_ds6_nbr_t, ds6_neighbors);
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#endif /* UIP_DS6_NBR_MULTI_IPV6_ADDRS */
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/*---------------------------------------------------------------------------*/
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void
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uip_ds6_neighbors_init(void)
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{
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link_stats_init();
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#if UIP_DS6_NBR_MULTI_IPV6_ADDRS
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memb_init(&uip_ds6_nbr_memb);
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nbr_table_register(uip_ds6_nbr_entries,
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(nbr_table_callback *)callback_nbr_entry_removal);
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#else
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nbr_table_register(ds6_neighbors, (nbr_table_callback *)uip_ds6_nbr_rm);
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#endif /* UIP_DS6_NBR_MULTI_IPV6_ADDRS */
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}
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/*---------------------------------------------------------------------------*/
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uip_ds6_nbr_t *
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@ -75,8 +96,44 @@ uip_ds6_nbr_add(const uip_ipaddr_t *ipaddr, const uip_lladdr_t *lladdr,
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uint8_t isrouter, uint8_t state, nbr_table_reason_t reason,
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void *data)
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{
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uip_ds6_nbr_t *nbr = nbr_table_add_lladdr(ds6_neighbors, (linkaddr_t*)lladdr
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, reason, data);
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uip_ds6_nbr_t *nbr;
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#if UIP_DS6_NBR_MULTI_IPV6_ADDRS
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uip_ds6_nbr_entry_t *nbr_entry;
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assert(uip_ds6_nbr_lookup(ipaddr) == NULL);
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if(uip_ds6_nbr_lookup(ipaddr)) {
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LOG_ERR("%s: uip_ds6_nbr for ", __func__);
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LOG_ERR_6ADDR(ipaddr);
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LOG_ERR_("has already existed\n");
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return NULL;
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}
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nbr_entry = nbr_table_get_from_lladdr(uip_ds6_nbr_entries,
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(const linkaddr_t *)lladdr);
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if(nbr_entry == NULL) {
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if((nbr_entry =
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nbr_table_add_lladdr(uip_ds6_nbr_entries,
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(linkaddr_t*)lladdr, reason, data)) == NULL) {
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LOG_ERR("%s: cannot allocate a new uip_ds6_nbr_entry\n", __func__);
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return NULL;
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} else {
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LIST_STRUCT_INIT(nbr_entry, uip_ds6_nbrs);
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}
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}
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if((nbr = (uip_ds6_nbr_t *)memb_alloc(&uip_ds6_nbr_memb)) == NULL) {
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LOG_ERR("%s: cannot allocate a new uip_ds6_nbr\n", __func__);
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if(list_length(nbr_entry->uip_ds6_nbrs) == 0) {
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nbr_table_remove(uip_ds6_nbr_entries, nbr_entry);
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}
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} else {
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add_uip_ds6_nbr_to_nbr_entry(nbr, nbr_entry);
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}
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#else
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nbr = nbr_table_add_lladdr(ds6_neighbors, (linkaddr_t*)lladdr, reason, data);
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#endif /* UIP_DS6_NBR_MULTI_IPV6_ADDRS */
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if(nbr) {
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uip_ipaddr_copy(&nbr->ipaddr, ipaddr);
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#if UIP_ND6_SEND_RA || !UIP_CONF_ROUTER
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@ -113,10 +170,91 @@ uip_ds6_nbr_add(const uip_ipaddr_t *ipaddr, const uip_lladdr_t *lladdr,
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}
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}
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#if UIP_DS6_NBR_MULTI_IPV6_ADDRS
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/*---------------------------------------------------------------------------*/
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static void
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add_uip_ds6_nbr_to_nbr_entry(uip_ds6_nbr_t *nbr,
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uip_ds6_nbr_entry_t *nbr_entry)
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{
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LOG_DBG("%s: add nbr(%p) to nbr_entry (%p)\n",
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__func__, nbr, nbr_entry);
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nbr->nbr_entry = nbr_entry;
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list_add(nbr_entry->uip_ds6_nbrs, nbr);
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}
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/*---------------------------------------------------------------------------*/
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static void
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remove_uip_ds6_nbr_from_nbr_entry(uip_ds6_nbr_t *nbr)
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{
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if(nbr == NULL) {
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return;
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}
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LOG_DBG("%s: remove nbr(%p) from nbr_entry (%p)\n",
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__func__, nbr, nbr->nbr_entry);
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list_remove(nbr->nbr_entry->uip_ds6_nbrs, nbr);
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}
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/*---------------------------------------------------------------------------*/
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static void
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remove_nbr_entry(uip_ds6_nbr_entry_t *nbr_entry)
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{
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if(nbr_entry == NULL) {
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return;
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}
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LOG_DBG("%s: remove nbr_entry (%p) from nbr_table\n",
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__func__, nbr_entry);
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(void)nbr_table_remove(uip_ds6_nbr_entries, nbr_entry);
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}
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/*---------------------------------------------------------------------------*/
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static void
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free_uip_ds6_nbr(uip_ds6_nbr_t *nbr)
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{
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if(nbr == NULL) {
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return;
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}
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#if UIP_CONF_IPV6_QUEUE_PKT
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uip_packetqueue_free(&nbr->packethandle);
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#endif /* UIP_CONF_IPV6_QUEUE_PKT */
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NETSTACK_ROUTING.neighbor_state_changed(nbr);
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assert(nbr->nbr_entry != NULL);
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if(nbr->nbr_entry == NULL) {
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LOG_ERR("%s: unexpected error nbr->nbr_entry is NULL\n", __func__);
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} else {
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remove_uip_ds6_nbr_from_nbr_entry(nbr);
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if(list_length(nbr->nbr_entry->uip_ds6_nbrs) == 0) {
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remove_nbr_entry(nbr->nbr_entry);
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}
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}
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LOG_DBG("%s: free memory for nbr(%p)\n", __func__, nbr);
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memb_free(&uip_ds6_nbr_memb, nbr);
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}
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/*---------------------------------------------------------------------------*/
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static void
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callback_nbr_entry_removal(uip_ds6_nbr_entry_t *nbr_entry)
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{
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uip_ds6_nbr_t *nbr;
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uip_ds6_nbr_t *next_nbr;
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if(nbr_entry == NULL) {
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return;
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}
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for(nbr = (uip_ds6_nbr_t *)list_head(nbr_entry->uip_ds6_nbrs);
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nbr != NULL;
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nbr = next_nbr) {
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next_nbr = (uip_ds6_nbr_t *)list_item_next(nbr);
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free_uip_ds6_nbr(nbr);
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}
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}
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#endif /* UIP_DS6_NBR_MULTI_IPV6_ADDRS */
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/*---------------------------------------------------------------------------*/
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int
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uip_ds6_nbr_rm(uip_ds6_nbr_t *nbr)
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{
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#if UIP_DS6_NBR_MULTI_IPV6_ADDRS
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if(nbr == NULL) {
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return 0;
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} else {
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free_uip_ds6_nbr(nbr);
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return 1;
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}
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#else /* UIP_DS6_NBR_MULTI_IPV6_ADDRS */
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if(nbr != NULL) {
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#if UIP_CONF_IPV6_QUEUE_PKT
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uip_packetqueue_free(&nbr->packethandle);
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@ -125,19 +263,52 @@ uip_ds6_nbr_rm(uip_ds6_nbr_t *nbr)
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return nbr_table_remove(ds6_neighbors, nbr);
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}
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return 0;
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#endif /* UIP_DS6_NBR_MULTI_IPV6_ADDRS */
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}
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/*---------------------------------------------------------------------------*/
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int
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uip_ds6_nbr_update_ll(uip_ds6_nbr_t **nbr_pp, const uip_lladdr_t *new_ll_addr)
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{
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#if UIP_DS6_NBR_MULTI_IPV6_ADDRS
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uip_ds6_nbr_entry_t *nbr_entry;
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uip_ds6_nbr_t *nbr;
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#else
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uip_ds6_nbr_t nbr_backup;
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#endif /* UIP_DS6_NBR_MULTI_IPV6_ADDRS */
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if(nbr_pp == NULL || new_ll_addr == NULL) {
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LOG_ERR("%s: invalid argument\n", __func__);
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return -1;
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}
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#if UIP_DS6_NBR_MULTI_IPV6_ADDRS
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if((nbr_entry =
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nbr_table_get_from_lladdr(uip_ds6_nbr_entries,
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(const linkaddr_t *)new_ll_addr)) == NULL) {
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if((nbr_entry =
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nbr_table_add_lladdr(uip_ds6_nbr_entries,
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(const linkaddr_t*)new_ll_addr,
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NBR_TABLE_REASON_IPV6_ND, NULL)) == NULL) {
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LOG_ERR("%s: cannot allocate a nbr_entry for", __func__);
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LOG_ERR_LLADDR((const linkaddr_t *)new_ll_addr);
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return -1;
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} else {
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LIST_STRUCT_INIT(nbr_entry, uip_ds6_nbrs);
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}
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}
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nbr = *nbr_pp;
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remove_uip_ds6_nbr_from_nbr_entry(nbr);
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if(list_length(nbr->nbr_entry->uip_ds6_nbrs) == 0) {
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remove_nbr_entry(nbr->nbr_entry);
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}
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add_uip_ds6_nbr_to_nbr_entry(nbr, nbr_entry);
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#else /* UIP_DS6_NBR_MULTI_IPV6_ADDRS */
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/* make sure new_ll_addr is not used in some other nbr */
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if(uip_ds6_nbr_ll_lookup(new_ll_addr) != NULL) {
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LOG_ERR("%s: new_ll_addr, ", __func__);
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@ -159,6 +330,7 @@ uip_ds6_nbr_update_ll(uip_ds6_nbr_t **nbr_pp, const uip_lladdr_t *new_ll_addr)
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return -1;
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}
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memcpy(*nbr_pp, &nbr_backup, sizeof(uip_ds6_nbr_t));
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#endif /* UIP_DS6_NBR_MULTI_IPV6_ADDRS */
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return 0;
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}
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@ -173,47 +345,89 @@ uip_ds6_nbr_get_ipaddr(const uip_ds6_nbr_t *nbr)
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const uip_lladdr_t *
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uip_ds6_nbr_get_ll(const uip_ds6_nbr_t *nbr)
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{
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#if UIP_DS6_NBR_MULTI_IPV6_ADDRS
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if(nbr == NULL) {
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return NULL;
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}
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return (const uip_lladdr_t *)nbr_table_get_lladdr(uip_ds6_nbr_entries,
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nbr->nbr_entry);
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#else
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return (const uip_lladdr_t *)nbr_table_get_lladdr(ds6_neighbors, nbr);
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#endif /* UIP_DS6_NBR_MULTI_IPV6_ADDRS */
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}
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/*---------------------------------------------------------------------------*/
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int
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uip_ds6_nbr_num(void)
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{
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uip_ds6_nbr_t *nbr;
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int num;
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int num = 0;
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num = 0;
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#if UIP_DS6_NBR_MULTI_IPV6_ADDRS
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uip_ds6_nbr_entry_t *nbr_entry;
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for(nbr_entry = nbr_table_head(uip_ds6_nbr_entries);
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nbr_entry != NULL;
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nbr_entry = nbr_table_next(uip_ds6_nbr_entries, nbr_entry)) {
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num += list_length(nbr_entry->uip_ds6_nbrs);
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}
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#else
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uip_ds6_nbr_t *nbr;
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for(nbr = nbr_table_head(ds6_neighbors);
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nbr != NULL;
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nbr = nbr_table_next(ds6_neighbors, nbr)) {
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num++;
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}
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#endif /* UIP_DS6_NBR_MULTI_IPV6_ADDRS */
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return num;
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}
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/*---------------------------------------------------------------------------*/
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uip_ds6_nbr_t *
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uip_ds6_nbr_head(void)
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{
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#if UIP_DS6_NBR_MULTI_IPV6_ADDRS
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uip_ds6_nbr_entry_t *nbr_entry;
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if((nbr_entry = nbr_table_head(uip_ds6_nbr_entries)) == NULL) {
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return NULL;
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}
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assert(list_head(nbr_entry->uip_ds6_nbrs) != NULL);
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return (uip_ds6_nbr_t *)list_head(nbr_entry->uip_ds6_nbrs);
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#else
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return nbr_table_head(ds6_neighbors);
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#endif /* UIP_DS6_NBR_MULTI_IPV6_ADDRS */
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}
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/*---------------------------------------------------------------------------*/
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uip_ds6_nbr_t *
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uip_ds6_nbr_next(uip_ds6_nbr_t *nbr)
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{
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#if UIP_DS6_NBR_MULTI_IPV6_ADDRS
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uip_ds6_nbr_entry_t *nbr_entry;
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if(nbr == NULL) {
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return NULL;
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}
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if(list_item_next(nbr) != NULL) {
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return list_item_next(nbr);
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}
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nbr_entry = nbr_table_next(uip_ds6_nbr_entries, nbr->nbr_entry);
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if(nbr_entry == NULL) {
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return NULL;
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} else {
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assert(list_head(nbr_entry->uip_ds6_nbrs) != NULL);
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return (uip_ds6_nbr_t *)list_head(nbr_entry->uip_ds6_nbrs);
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}
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#else
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return nbr_table_next(ds6_neighbors, nbr);
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#endif /* UIP_DS6_NBR_MULTI_IPV6_ADDRS */
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}
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/*---------------------------------------------------------------------------*/
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uip_ds6_nbr_t *
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uip_ds6_nbr_lookup(const uip_ipaddr_t *ipaddr)
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{
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uip_ds6_nbr_t *nbr = nbr_table_head(ds6_neighbors);
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if(ipaddr != NULL) {
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while(nbr != NULL) {
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uip_ds6_nbr_t *nbr;
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if(ipaddr == NULL) {
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return NULL;
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}
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for(nbr = uip_ds6_nbr_head(); nbr != NULL; nbr = uip_ds6_nbr_next(nbr)) {
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if(uip_ipaddr_cmp(&nbr->ipaddr, ipaddr)) {
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return nbr;
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}
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nbr = nbr_table_next(ds6_neighbors, nbr);
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}
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}
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return NULL;
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}
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@ -221,7 +435,23 @@ uip_ds6_nbr_lookup(const uip_ipaddr_t *ipaddr)
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uip_ds6_nbr_t *
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uip_ds6_nbr_ll_lookup(const uip_lladdr_t *lladdr)
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{
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#if UIP_DS6_NBR_MULTI_IPV6_ADDRS
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uip_ds6_nbr_entry_t *nbr_entry;
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/*
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* we cannot determine which entry should return by lladdr alone;
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* return the first entry associated with lladdr.
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*/
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nbr_entry =
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(uip_ds6_nbr_entry_t *)nbr_table_get_from_lladdr(uip_ds6_nbr_entries,
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(linkaddr_t*)lladdr);
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if(nbr_entry == NULL) {
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return NULL;
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}
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assert(list_head(nbr_entry->uip_ds6_nbrs) != NULL);
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return (uip_ds6_nbr_t *)list_head(nbr_entry->uip_ds6_nbrs);
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#else
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return nbr_table_get_from_lladdr(ds6_neighbors, (linkaddr_t*)lladdr);
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#endif /* UIP_DS6_NBR_MULTI_IPV6_ADDRS */
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}
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/*---------------------------------------------------------------------------*/
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@ -239,6 +469,20 @@ uip_ds6_nbr_lladdr_from_ipaddr(const uip_ipaddr_t *ipaddr)
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uip_ds6_nbr_t *nbr = uip_ds6_nbr_lookup(ipaddr);
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return nbr ? uip_ds6_nbr_get_ll(nbr) : NULL;
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}
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#if UIP_DS6_LL_NUD
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/*---------------------------------------------------------------------------*/
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static void
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update_nbr_reachable_state_by_ack(uip_ds6_nbr_t *nbr, const linkaddr_t *lladdr)
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{
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if(nbr != NULL && nbr->state != NBR_INCOMPLETE) {
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nbr->state = NBR_REACHABLE;
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stimer_set(&nbr->reachable, UIP_ND6_REACHABLE_TIME / 1000);
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LOG_INFO("received a link layer ACK : ");
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LOG_INFO_LLADDR(lladdr);
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LOG_INFO_(" is reachable.\n");
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}
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}
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#endif /* UIP_DS6_LL_NUD */
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
uip_ds6_link_callback(int status, int numtx)
|
||||
@ -266,14 +510,22 @@ uip_ds6_link_callback(int status, int numtx)
|
||||
* acknowledges link packets. */
|
||||
if(status == MAC_TX_OK) {
|
||||
uip_ds6_nbr_t *nbr;
|
||||
nbr = uip_ds6_nbr_ll_lookup((uip_lladdr_t *)dest);
|
||||
if(nbr != NULL && nbr->state != NBR_INCOMPLETE) {
|
||||
nbr->state = NBR_REACHABLE;
|
||||
stimer_set(&nbr->reachable, UIP_ND6_REACHABLE_TIME / 1000);
|
||||
LOG_INFO("received a link layer ACK : ");
|
||||
LOG_INFO_LLADDR((uip_lladdr_t *)dest);
|
||||
LOG_INFO_(" is reachable.\n");
|
||||
#if UIP_DS6_NBR_MULTI_IPV6_ADDRS
|
||||
uip_ds6_nbr_entry_t *nbr_entry;
|
||||
if((nbr_entry =
|
||||
(uip_ds6_nbr_entry_t *)nbr_table_get_from_lladdr(uip_ds6_nbr_entries,
|
||||
dest)) == NULL) {
|
||||
return;
|
||||
}
|
||||
for(nbr = (uip_ds6_nbr_t *)list_head(nbr_entry->uip_ds6_nbrs);
|
||||
nbr != NULL;
|
||||
nbr = (uip_ds6_nbr_t *)list_item_next(nbr)) {
|
||||
update_nbr_reachable_state_by_ack(nbr, dest);
|
||||
}
|
||||
#else /* UIP_DS6_NBR_MULTI_IPV6_ADDRS */
|
||||
nbr = uip_ds6_nbr_ll_lookup((uip_lladdr_t *)dest);
|
||||
update_nbr_reachable_state_by_ack(nbr, dest);
|
||||
#endif /* UIP_DS6_NBR_MULTI_IPV6_ADDRS */
|
||||
}
|
||||
#endif /* UIP_DS6_LL_NUD */
|
||||
}
|
||||
@ -283,7 +535,7 @@ uip_ds6_link_callback(int status, int numtx)
|
||||
void
|
||||
uip_ds6_neighbor_periodic(void)
|
||||
{
|
||||
uip_ds6_nbr_t *nbr = nbr_table_head(ds6_neighbors);
|
||||
uip_ds6_nbr_t *nbr = uip_ds6_nbr_head();
|
||||
while(nbr != NULL) {
|
||||
switch(nbr->state) {
|
||||
case NBR_REACHABLE:
|
||||
@ -354,7 +606,7 @@ uip_ds6_neighbor_periodic(void)
|
||||
default:
|
||||
break;
|
||||
}
|
||||
nbr = nbr_table_next(ds6_neighbors, nbr);
|
||||
nbr = uip_ds6_nbr_next(nbr);
|
||||
}
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
@ -373,7 +625,7 @@ uip_ds6_nbr_refresh_reachable_state(const uip_ipaddr_t *ipaddr)
|
||||
uip_ds6_nbr_t *
|
||||
uip_ds6_get_least_lifetime_neighbor(void)
|
||||
{
|
||||
uip_ds6_nbr_t *nbr = nbr_table_head(ds6_neighbors);
|
||||
uip_ds6_nbr_t *nbr = uip_ds6_nbr_head();
|
||||
uip_ds6_nbr_t *nbr_expiring = NULL;
|
||||
while(nbr != NULL) {
|
||||
if(nbr_expiring != NULL) {
|
||||
@ -384,7 +636,7 @@ uip_ds6_get_least_lifetime_neighbor(void)
|
||||
} else {
|
||||
nbr_expiring = nbr;
|
||||
}
|
||||
nbr = nbr_table_next(ds6_neighbors, nbr);
|
||||
nbr = uip_ds6_nbr_next(nbr);
|
||||
}
|
||||
return nbr_expiring;
|
||||
}
|
||||
|
||||
@ -54,6 +54,10 @@
|
||||
#if UIP_CONF_IPV6_QUEUE_PKT
|
||||
#include "net/ipv6/uip-packetqueue.h"
|
||||
#endif /*UIP_CONF_QUEUE_PKT */
|
||||
#if UIP_DS6_NBR_CONF_MULTI_IPV6_ADDRS
|
||||
#include "lib/assert.h"
|
||||
#include "lib/list.h"
|
||||
#endif
|
||||
|
||||
/*--------------------------------------------------*/
|
||||
/** \brief Possible states for the nbr cache entries */
|
||||
@ -63,8 +67,32 @@
|
||||
#define NBR_DELAY 3
|
||||
#define NBR_PROBE 4
|
||||
|
||||
#ifdef UIP_DS6_NBR_CONF_MULTI_IPV6_ADDRS
|
||||
#define UIP_DS6_NBR_MULTI_IPV6_ADDRS UIP_DS6_NBR_CONF_MULTI_IPV6_ADDRS
|
||||
#else
|
||||
#define UIP_DS6_NBR_MULTI_IPV6_ADDRS 0
|
||||
#endif /* UIP_DS6_NBR_CONF_MULTI_IPV6_ADDRS */
|
||||
|
||||
#ifdef UIP_DS6_NBR_CONF_MAX_NEIGHBOR_CACHES
|
||||
#define UIP_DS6_NBR_MAX_NEIGHBOR_CACHES UIP_DS6_NBR_CONF_MAX_NEIGHBOR_CACHES
|
||||
#else
|
||||
#define UIP_DS6_NBR_MAX_NEIGHBOR_CACHES NBR_TABLE_MAX_NEIGHBORS
|
||||
#endif /* UIP_DS6_NBR_CONF_MAX_NEIGHBOR_CACHES */
|
||||
|
||||
|
||||
#if UIP_DS6_NBR_MULTI_IPV6_ADDRS
|
||||
/** \brief An nbr_table entry for neighbor caches */
|
||||
typedef struct {
|
||||
LIST_STRUCT(uip_ds6_nbrs);
|
||||
} uip_ds6_nbr_entry_t;
|
||||
#endif /* UIP_DS6_NBR_MULTI_IPV6_ADDRS */
|
||||
|
||||
/** \brief An entry in the nbr cache */
|
||||
typedef struct uip_ds6_nbr {
|
||||
#if UIP_DS6_NBR_MULTI_IPV6_ADDRS
|
||||
struct uip_ds6_nbr *next;
|
||||
uip_ds6_nbr_entry_t *nbr_entry;
|
||||
#endif /* UIP_DS6_NBR_MULTI_IPV6_ADDRS */
|
||||
uip_ipaddr_t ipaddr;
|
||||
uint8_t isrouter;
|
||||
uint8_t state;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user