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Support prefix udpates with PIO Handling

This commit is contained in:
Sébastien Dawans 2013-02-05 11:19:41 +01:00 committed by Mariano Alvira
parent 5df586e09d
commit 1be01a9c90
1 changed files with 29 additions and 3 deletions
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32
core/net/rpl/rpl-dag.c
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@ -336,18 +336,29 @@ check_prefix(rpl_prefix_t *last_prefix, rpl_prefix_t *new_prefix)
int
rpl_set_prefix(rpl_dag_t *dag, uip_ipaddr_t *prefix, unsigned len)
{
rpl_prefix_t last_prefix;
uint8_t last_len = dag->prefix_info.length;
if(len > 128) {
return 0;
}
if(dag->prefix_info.length != 0) {
memcpy(&last_prefix, &dag->prefix_info, sizeof(rpl_prefix_t));
}
memset(&dag->prefix_info.prefix, 0, sizeof(dag->prefix_info.prefix));
memcpy(&dag->prefix_info.prefix, prefix, (len + 7) / 8);
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. */
check_prefix(NULL, &dag->prefix_info);
with this prefix. Otherwise, update the prefix */
if(last_len == 0) {
PRINTF("rpl_set_prefix - prefix NULL\n");
check_prefix(NULL, &dag->prefix_info);
} else {
PRINTF("rpl_set_prefix - prefix NON-NULL\n");
check_prefix(&last_prefix, &dag->prefix_info);
}
return 1;
}
/*---------------------------------------------------------------------------*/
@ -1110,6 +1121,13 @@ rpl_process_dio(uip_ipaddr_t *from, rpl_dio_t *dio)
RPL_LOLLIPOP_INCREMENT(dag->version);
rpl_reset_dio_timer(instance);
} else {
PRINTF("RPL: Global Repair\n");
if(dio->prefix_info.length != 0) {
if(dio->prefix_info.flags & UIP_ND6_RA_FLAG_AUTONOMOUS) {
PRINTF("RPL : Prefix announced in DIO\n");
rpl_set_prefix(dag, &dio->prefix_info.prefix, dio->prefix_info.length);
}
}
global_repair(from, dag, dio);
}
return;
@ -1152,6 +1170,14 @@ rpl_process_dio(uip_ipaddr_t *from, rpl_dio_t *dio)
} else if(dio->rank == INFINITE_RANK && dag->joined) {
rpl_reset_dio_timer(instance);
}
/* Prefix Information Option treated to add new prefix */
if(dio->prefix_info.length != 0) {
if(dio->prefix_info.flags & UIP_ND6_RA_FLAG_AUTONOMOUS) {
PRINTF("RPL : Prefix announced in DIO\n");
rpl_set_prefix(dag, &dio->prefix_info.prefix, dio->prefix_info.length);
}
}
if(dag->rank == ROOT_RANK(instance)) {
if(dio->rank != INFINITE_RANK) {