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rpl-lite: simplify SRH insertion

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This commit is contained in:
Simon Duquennoy 2017-10-12 11:30:00 +02:00
parent 02f5929ade
commit 1b97641e7f
1 changed files with 9 additions and 17 deletions
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26
os/net/rpl-lite/rpl-ext-header.c
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@ -241,14 +241,16 @@ insert_srh_header(void)
/* Get link of the destination and root */
if(!rpl_is_addr_in_our_dag(&UIP_IP_BUF->destipaddr)) {
LOG_ERR("SRH destination not in our DAG\n");
return 0;
/* The destination is not in our DAG, skip SRH insertion */
LOG_INFO("SRH destination not in our DAG, skip SRH insertion\n");
return 1;
}
dest_node = rpl_ns_get_node(&UIP_IP_BUF->destipaddr);
if(dest_node == NULL) {
LOG_ERR("SRH node not found\n");
return 0;
/* The destination is not found, skip SRH insertion */
LOG_INFO("SRH node not found, skip SRH insertion\n");
return 1;
}
root_node = rpl_ns_get_node(&curr_instance.dag.dag_id);
@ -507,20 +509,10 @@ rpl_ext_header_update(void)
if(rpl_dag_root_is_root()) {
/* At the root, remove headers if any, and insert SRH or HBH
* (SRH is inserted only if the destination is in the DODAG) */
* (SRH is inserted only if the destination is down the DODAG) */
rpl_ext_header_remove();
if(rpl_is_addr_in_our_dag(&UIP_IP_BUF->destipaddr)) {
/* dest is in a DODAG; the packet is going down. */
if(curr_instance.mop != RPL_MOP_NO_DOWNWARD_ROUTES) {
return insert_srh_header();
} else {
LOG_ERR("packet going down at root, but no support for downward routing\n");
return 0; /* No support for downward routes */
}
} else {
/* dest is outside of DODAGs; no ext header is needed. */
return 1;
}
/* Insert SRH (if needed) */
return insert_srh_header();
} else {
if(uip_ds6_is_my_addr(&UIP_IP_BUF->srcipaddr)
&& UIP_IP_BUF->ttl == uip_ds6_if.cur_hop_limit) {