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rpl: logic to switch between dodags #2631

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rpl: logic to switch between dodags #2631

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rpl: logic to switch between dodags
cgundogan Mar 17, 2015
c2f2c67
rpl: put parens around each condition
cgundogan Mar 19, 2015
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15 changes: 15 additions & 0 deletions sys/net/routing/rpl/rpl_control_messages.c
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Original file line number Diff line number Diff line change
Expand Up @@ -669,6 +669,21 @@ void rpl_recv_DIO(void)
/* handle packet content... */
rpl_dodag_t *my_dodag = rpl_get_my_dodag();

if ((my_dodag != NULL) && (my_dodag->node_status != ROOT_NODE)
&& memcmp(&my_dodag->dodag_id, &dio_dodag.dodag_id, sizeof(ipv6_addr_t))) {
/* create a temporary parent and assign it to the incoming DIO's dodag */
rpl_parent_t tmp_parent = { .rank = byteorder_ntohs(rpl_dio_buf->rank), .dodag = &dio_dodag };
dio_dodag.my_preferred_parent = &tmp_parent;

/* calculate the incoming DIO's dodag rank and check wheter my rank would be better in the new dodag */
dio_dodag.my_rank = dio_dodag.of->calc_rank(&tmp_parent, tmp_parent.rank);
if (my_dodag != my_dodag->of->which_dodag(my_dodag, &dio_dodag)) {
/* my rank would be better in the incoming DIO's dodag. leave old dodag */
rpl_leave_dodag(my_dodag);
my_dodag = NULL;
}
}

if (my_dodag == NULL) {
if (!has_dodag_conf_opt) {
DEBUGF("send DIS\n");
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