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RPL prefix handling fix : Change IP on DODAG change, delete IP when leaving DODAG.

This commit is contained in:
Vincent Brillault 2011-07-13 10:42:59 +02:00
parent d8d9494168
commit d7c114dbd8
1 changed files with 57 additions and 10 deletions
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67
core/net/rpl/rpl-dag.c
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@ -260,6 +260,48 @@ rpl_repair_root(uint8_t instance_id)
return 0;
}
/************************************************************************/
inline void
allocate_ip_from_prefix(uip_ipaddr_t *ipaddr, rpl_prefix_t *prefix)
{
memset(ipaddr, 0, sizeof(uip_ipaddr_t));
memcpy(ipaddr, &prefix->prefix, prefix->length);
uip_ds6_set_addr_iid(ipaddr, &uip_lladdr);
}
void
rpl_check_prefix(rpl_prefix_t *last_prefix, rpl_prefix_t *new_prefix)
{
uip_ipaddr_t ipaddr;
uip_ds6_addr_t *rep;
uint8_t flag = 0;
if((last_prefix != NULL)
&& ((new_prefix == NULL)
|| (flag = (last_prefix->length != new_prefix->length)
|| (!uip_ipaddr_prefixcmp(&last_prefix->prefix, &new_prefix->prefix, new_prefix->length))
|| (last_prefix->flags != new_prefix->flags)))) {
allocate_ip_from_prefix(&ipaddr,last_prefix);
if((rep = uip_ds6_addr_lookup(&ipaddr)) != NULL) {
PRINTF("RPL: removing global IP address ");
PRINT6ADDR(&ipaddr);
PRINTF("\n");
uip_ds6_addr_rm(rep);
}
}
if(((last_prefix == NULL)
&& (new_prefix != NULL))
|| flag) {
allocate_ip_from_prefix(&ipaddr,new_prefix);
if(uip_ds6_addr_lookup(&ipaddr) == NULL) {
PRINTF("RPL: adding global IP address ");
PRINT6ADDR(&ipaddr);
PRINTF("\n");
uip_ds6_addr_add(&ipaddr, 0, ADDR_AUTOCONF);
}
}
}
/************************************************************************/
int
rpl_set_prefix(rpl_dag_t *dag, uip_ipaddr_t *prefix, int len)
{
@ -269,6 +311,9 @@ rpl_set_prefix(rpl_dag_t *dag, uip_ipaddr_t *prefix, int len)
dag->prefix_info.length = len;
dag->prefix_info.flags = UIP_ND6_RA_FLAG_AUTONOMOUS;
PRINTF("RPL: Prefix set - will announce this in DIOs\n");
/* Autoconfigure an address if this node does not already have an address
with this prefix. */
rpl_check_prefix(NULL,&dag->prefix_info);
return 1;
}
return 0;
@ -402,6 +447,11 @@ rpl_free_dodag(rpl_dag_t *dag)
/* Remove routes installed by DAOs. */
rpl_remove_routes(dag);
/* Remove autoconfigured address */
if((dag->prefix_info.flags & UIP_ND6_RA_FLAG_AUTONOMOUS)) {
rpl_check_prefix(&dag->prefix_info, NULL);
}
remove_parents(dag, 0);
}
dag->used = 0;
@ -520,6 +570,12 @@ rpl_select_dodag(rpl_instance_t * instance, rpl_parent_t *p)
PRINT6ADDR(&best_dag->dag_id);
PRINTF("\n");
if(best_dag->prefix_info.flags & UIP_ND6_RA_FLAG_AUTONOMOUS) {
rpl_check_prefix(&instance->current_dag->prefix_info, &best_dag->prefix_info);
} else if(instance->current_dag->prefix_info.flags & UIP_ND6_RA_FLAG_AUTONOMOUS) {
rpl_check_prefix(&instance->current_dag->prefix_info, NULL);
}
best_dag->joined = 1;
instance->current_dag->joined = 0;
instance->current_dag = best_dag;
@ -759,16 +815,7 @@ rpl_join_instance(uip_ipaddr_t *from, rpl_dio_t *dio)
/* Autoconfigure an address if this node does not already have an address
with this prefix. */
if((dio->prefix_info.flags & UIP_ND6_RA_FLAG_AUTONOMOUS)) {
uip_ipaddr_t ipaddr;
/* assume that the prefix ends with zeros! */
memcpy(&ipaddr, &dio->prefix_info.prefix, 16);
uip_ds6_set_addr_iid(&ipaddr, &uip_lladdr);
if(uip_ds6_addr_lookup(&ipaddr) == NULL) {
PRINTF("RPL: adding global IP address ");
PRINT6ADDR(&ipaddr);
PRINTF("\n");
uip_ds6_addr_add(&ipaddr, 0, ADDR_AUTOCONF);
}
rpl_check_prefix(NULL, &dio->prefix_info);
}
dag->joined = 1;