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Use a stricter check in rpl_srh_get_next_hop()

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This commit is contained in:
Yasuyuki Tanaka 2016-02-16 15:11:37 +01:00 committed by Simon Duquennoy
parent 0be30628ce
commit 97a362acdc
1 changed files with 9 additions and 4 deletions
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13
core/net/rpl/rpl-ext-header.c
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@ -181,10 +181,11 @@ rpl_srh_get_next_hop(uip_ipaddr_t *ipaddr)
uint8_t *uip_next_hdr;
int last_uip_ext_len = uip_ext_len;
rpl_dag_t *dag;
rpl_ns_node_t *dest_node;
rpl_ns_node_t *root_node;
uip_ext_len = 0;
uip_next_hdr = &UIP_IP_BUF->proto;
dag = rpl_get_dag(&UIP_IP_BUF->destipaddr);
/* Look for routing header */
while(uip_next_hdr != NULL && *uip_next_hdr != UIP_PROTO_ROUTING) {
@ -209,11 +210,15 @@ rpl_srh_get_next_hop(uip_ipaddr_t *ipaddr)
}
}
dag = rpl_get_dag(&IP_IP_BUF->destipaddr);
root_node = rpl_ns_get_node(dag, &dag->dag_id);
dest_node = rpl_ns_get_node(dag, &UIP_IP_BUF->destipaddr);
if((uip_next_hdr != NULL && *uip_next_hdr == UIP_PROTO_ROUTING
&& UIP_RH_BUF->routing_type == RPL_RH_TYPE_SRH) ||
(default_instance->current_dag->rank == ROOT_RANK(default_instance) &&
rpl_ns_get_node(dag, &UIP_IP_BUF->destipaddr) != NULL)) {
/* Routing header found. The next hop should be already copied as the IPv6 destination
(dest_node != NULL && root_node != NULL && node->parent == root_node)) {
/* Routing header found or the packet destined for a direct child of the root.
* The next hop should be already copied as the IPv6 destination
* address, via rpl_process_srh_header. We turn this address into a link-local to enable
* forwarding to next hop */
uip_ipaddr_copy(ipaddr, &UIP_IP_BUF->destipaddr);