Contiki-NG
rpl-nbr-policy.c
1 /*
2  * Copyright (c) 2020, Yanzi Networks AB.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the copyright holder nor the names of its
14  * contributors may be used to endorse or promote products derived
15  * from this software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
20  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
21  * COPYRIGHT HOLDERS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
24  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
26  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
27  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28  * SUCH DAMAGE.
29  *
30  */
31 
32  /**
33  * \addtogroup uip
34  * @{
35  */
36 
37 #include "net/routing/rpl-lite/rpl.h"
38 #include "net/nbr-table.h"
39 #include "net/link-stats.h"
40 #include "net/ipv6/uip-ds6-route.h"
41 #include "sys/log.h"
42 
43 #define LOG_MODULE "RPL-nbrpol"
44 #define LOG_LEVEL LOG_LEVEL_NONE
45 
46 /*---------------------------------------------------------------------------*/
47 static rpl_rank_t
48 get_rank(const linkaddr_t *lladdr)
49 {
50  rpl_parent_t *p = rpl_neighbor_get_from_lladdr((uip_lladdr_t *)lladdr);
51  if(p == NULL) {
52  return RPL_INFINITE_RANK;
53  } else {
54  return curr_instance.of->rank_via_nbr(p);
55  }
56 }
57 /*---------------------------------------------------------------------------*/
58 const linkaddr_t *
59 rpl_nbr_gc_get_worst(const linkaddr_t *lladdr1, const linkaddr_t *lladdr2)
60 {
61  return get_rank(lladdr2) > get_rank(lladdr1) ? lladdr2 : lladdr1;
62 }
63 /*---------------------------------------------------------------------------*/
64 /** @}*/
Header file for routing table manipulation.
Header file for the logging system
rpl_nbr_t * rpl_neighbor_get_from_lladdr(uip_lladdr_t *addr)
Returns a neighbor from its link-layer address.
Definition: rpl-neighbor.c:213