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mbed-os/features/nanostack/sal-stack-nanostack/source/6LoWPAN/ws/ws_bbr_api.c

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/*
* Copyright (c) 2018-2019, Arm Limited and affiliates.
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <string.h>
#include "nsconfig.h"
#include "ns_types.h"
#include "ns_trace.h"
#include "net_interface.h"
#include "socket_api.h"
#include "eventOS_event.h"
#include "NWK_INTERFACE/Include/protocol.h"
#include "6LoWPAN/Bootstraps/protocol_6lowpan.h"
#include "6LoWPAN/Bootstraps/protocol_6lowpan_interface.h"
#include "6LoWPAN/ws/ws_config.h"
#include "6LoWPAN/ws/ws_common.h"
#include "6LoWPAN/ws/ws_bootstrap.h"
#include "6LoWPAN/ws/ws_cfg_settings.h"
#include "6LoWPAN/ws/ws_pae_key_storage.h"
#include "RPL/rpl_control.h"
#include "RPL/rpl_data.h"
#include "Common_Protocols/icmpv6.h"
#include "Common_Protocols/icmpv6_radv.h"
#include "ws_management_api.h"
#include "net_rpl.h"
#include "Service_Libs/nd_proxy/nd_proxy.h"
#include "6LoWPAN/ws/ws_bbr_api_internal.h"
#include "6LoWPAN/ws/ws_pae_controller.h"
#include "DHCPv6_Server/DHCPv6_server_service.h"
#include "DHCPv6_client/dhcpv6_client_api.h"
#include "ws_bbr_api.h"
#define TRACE_GROUP "BBRw"
#define RPL_INSTANCE_ID 1
#ifdef HAVE_WS_BORDER_ROUTER
static uint8_t current_instance_id = RPL_INSTANCE_ID;
#define WS_ULA_LIFETIME 24*3600
#define WS_ROUTE_LIFETIME WS_ULA_LIFETIME
#define BBR_CHECK_INTERVAL 60
#define BBR_BACKUP_ULA_DELAY 300
/* when creating BBR make ULA dodag ID always and when network becomes available add prefix to DHCP
*
*
*/
static int8_t backbone_interface_id = -1; // BBR backbone information
static uint16_t configuration = 0;
static uint32_t pan_version_timer = 0;
static uint8_t static_dodag_prefix[8] = {0xfd, 0x00, 0x72, 0x83, 0x7e};
static uint8_t static_dodag_id_prefix[8] = {0xfd, 0x00, 0x61, 0x72, 0x6d};
static uint8_t current_dodag_id[16] = {0};
static uint8_t current_local_prefix[8] = {0};
static uint8_t current_global_prefix[16] = {0}; // DHCP requires 16 bytes prefix
static uint32_t bbr_delay_timer = BBR_CHECK_INTERVAL; // initial delay.
static uint32_t global_prefix_unavailable_timer = 0; // initial delay.
static rpl_dodag_conf_t rpl_conf = {
// Lifetime values
.default_lifetime = 120,
.lifetime_unit = 60,
.objective_code_point = 1, // MRHOF algorithm used
.authentication = false,
.path_control_size = 7,
.dag_max_rank_increase = WS_RPL_MAX_HOP_RANK_INCREASE,
.min_hop_rank_increase = WS_RPL_MIN_HOP_RANK_INCREASE,
// DIO configuration
.dio_interval_min = WS_RPL_DIO_IMIN_SMALL,
.dio_interval_doublings = WS_RPL_DIO_DOUBLING_SMALL,
.dio_redundancy_constant = WS_RPL_DIO_REDUNDANCY_SMALL
};
static void ws_bbr_rpl_version_timer_start(protocol_interface_info_entry_t *cur, uint8_t version)
{
// Set the next timeout value for version update
if (version < 128) {
//stable version for RPL so slow timer update is ok
cur->ws_info->rpl_version_timer = RPL_VERSION_LIFETIME;
} else {
if (cur->ws_info->cfg->gen.network_size <= NETWORK_SIZE_SMALL) {
// handles also NETWORK_SIZE_CERTIFICATE
cur->ws_info->rpl_version_timer = RPL_VERSION_LIFETIME_RESTART_SMALL;
} else if (cur->ws_info->cfg->gen.network_size <= NETWORK_SIZE_MEDIUM) {
cur->ws_info->rpl_version_timer = RPL_VERSION_LIFETIME_RESTART_MEDIUM;
} else if (cur->ws_info->cfg->gen.network_size <= NETWORK_SIZE_LARGE) {
cur->ws_info->rpl_version_timer = RPL_VERSION_LIFETIME_RESTART_LARGE;
} else {
cur->ws_info->rpl_version_timer = RPL_VERSION_LIFETIME_RESTART_EXTRA_LARGE;
}
}
}
static void ws_bbr_rpl_version_increase(protocol_interface_info_entry_t *cur)
{
if (!protocol_6lowpan_rpl_root_dodag) {
return;
}
ws_bbr_rpl_version_timer_start(cur, rpl_control_increment_dodag_version(protocol_6lowpan_rpl_root_dodag));
}
void ws_bbr_rpl_config(protocol_interface_info_entry_t *cur, uint8_t imin, uint8_t doubling, uint8_t redundancy, uint16_t dag_max_rank_increase, uint16_t min_hop_rank_increase)
{
if (imin == 0 || doubling == 0) {
// use default values
imin = WS_RPL_DIO_IMIN_SMALL;
doubling = WS_RPL_DIO_DOUBLING_SMALL;
redundancy = WS_RPL_DIO_REDUNDANCY_SMALL;
}
if (rpl_conf.dio_interval_min == imin &&
rpl_conf.dio_interval_doublings == doubling &&
rpl_conf.dio_redundancy_constant == redundancy &&
rpl_conf.dag_max_rank_increase == dag_max_rank_increase &&
rpl_conf.min_hop_rank_increase == min_hop_rank_increase) {
// Same values no update needed
return;
}
rpl_conf.dio_interval_min = imin;
rpl_conf.dio_interval_doublings = doubling;
rpl_conf.dio_redundancy_constant = redundancy;
rpl_conf.dag_max_rank_increase = dag_max_rank_increase;
rpl_conf.min_hop_rank_increase = min_hop_rank_increase;
if (protocol_6lowpan_rpl_root_dodag) {
rpl_control_update_dodag_config(protocol_6lowpan_rpl_root_dodag, &rpl_conf);
ws_bbr_rpl_version_increase(cur);
}
}
void ws_bbr_dhcp_address_lifetime_set(protocol_interface_info_entry_t *cur, uint32_t dhcp_address_lifetime)
{
if (!cur) {
return;
}
// Change the setting if the border router is active
DHCPv6_server_service_set_address_validlifetime(cur->id, current_global_prefix, dhcp_address_lifetime);
}
bool ws_bbr_backbone_address_get(uint8_t *address)
{
if (backbone_interface_id < 0) {
return false;
}
if (arm_net_address_get(backbone_interface_id, ADDR_IPV6_GP, address) != 0) {
// No global prefix available
return false;
}
return true;
}
static void ws_bbr_rpl_root_start(protocol_interface_info_entry_t *cur, uint8_t *dodag_id)
{
tr_info("RPL root start");
rpl_data_init_root();
if (protocol_6lowpan_rpl_root_dodag) {
rpl_control_delete_dodag_root(protocol_6lowpan_rpl_domain, protocol_6lowpan_rpl_root_dodag);
protocol_6lowpan_rpl_root_dodag = NULL;
}
protocol_6lowpan_rpl_root_dodag = rpl_control_create_dodag_root(protocol_6lowpan_rpl_domain, current_instance_id, dodag_id, &rpl_conf, rpl_conf.min_hop_rank_increase, RPL_GROUNDED | RPL_MODE_NON_STORING | RPL_DODAG_PREF(0));
if (!protocol_6lowpan_rpl_root_dodag) {
tr_err("RPL dodag init failed");
return;
}
// RPL memory limits set larger for Border router
rpl_control_set_memory_limits(64 * 1024, 0);
// Initial version number for RPL start is 240 from RPL RFC
ws_bbr_rpl_version_timer_start(cur, 240);
}
static void ws_bbr_rpl_root_stop(void)
{
tr_info("RPL root stop");
if (protocol_6lowpan_rpl_root_dodag) {
rpl_control_delete_dodag_root(protocol_6lowpan_rpl_domain, protocol_6lowpan_rpl_root_dodag);
protocol_6lowpan_rpl_root_dodag = NULL;
}
}
static int ws_border_router_proxy_validate(int8_t interface_id, uint8_t *address)
{
/* Could also check route type, but I don't think it really matters */
ipv6_route_t *route;
route = ipv6_route_choose_next_hop(address, interface_id, NULL);
if (!route || route->prefix_len < 128) {
return -1;
}
return 0;
}
int ws_border_router_proxy_state_update(int8_t caller_interface_id, int8_t handler_interface_id, bool status)
{
(void)caller_interface_id;
protocol_interface_info_entry_t *cur = protocol_stack_interface_info_get_by_id(handler_interface_id);
if (!cur) {
tr_error("No Interface");
return -1;
}
tr_debug("Border router Backhaul link %s", status ? "ready" : "down");
return 0;
}
static if_address_entry_t *ws_bbr_slaac_generate(protocol_interface_info_entry_t *cur, uint8_t *ula_prefix)
{
if_address_entry_t *add_entry = NULL;
const uint8_t *address;
address = addr_select_with_prefix(cur, ula_prefix, 64, 0);
if (address) {
// Address already exists for this prefix find the entry
add_entry = addr_get_entry(cur, address);
}
if (!add_entry) {
add_entry = icmpv6_slaac_address_add(cur, ula_prefix, 64, 0xffffffff, 0xffffffff, true, SLAAC_IID_FIXED);
}
if (!add_entry) {
tr_err("ula create failed");
return NULL;
}
// Set the timeouts for this address and policy
icmpv6_slaac_prefix_update(cur, ula_prefix, 64, 0xffffffff, 0xffffffff);
addr_policy_table_add_entry(ula_prefix, 64, 2, WS_NON_PREFFRED_LABEL);
return add_entry;
}
static void ws_bbr_slaac_remove(protocol_interface_info_entry_t *cur, uint8_t *ula_prefix)
{
if (cur) {
icmpv6_slaac_prefix_update(cur, ula_prefix, 64, 0, 0);
}
addr_policy_table_delete_entry(ula_prefix, 64);
}
static int ws_bbr_static_dodagid_create(protocol_interface_info_entry_t *cur)
{
if (memcmp(current_dodag_id, ADDR_UNSPECIFIED, 16) != 0) {
// address generated
return 0;
}
// This address is only used if no other address available.
if_address_entry_t *add_entry = ws_bbr_slaac_generate(cur, static_dodag_id_prefix);
if (!add_entry) {
tr_err("dodagid create failed");
return -1;
}
memcpy(current_dodag_id, add_entry->address, 16);
tr_info("BBR generate DODAGID %s", trace_ipv6(current_dodag_id));
return 0;
}
/*
* 0 static non rooted self generated own address
* 1 static address with backbone connectivity
*/
static void ws_bbr_bb_static_prefix_get(uint8_t *dodag_id_ptr)
{
/* Get static ULA prefix if we have configuration in backbone and there is address we use that.
*
* If there is no address we can use our own generated ULA as a backup ULA
*/
protocol_interface_info_entry_t *bb_interface = protocol_stack_interface_info_get_by_id(backbone_interface_id);
if (bb_interface && bb_interface->ipv6_configure->ipv6_stack_mode == NET_IPV6_BOOTSTRAP_STATIC) {
if (protocol_address_prefix_cmp(bb_interface, bb_interface->ipv6_configure->static_prefix64, 64)) {
memcpy(dodag_id_ptr, bb_interface->ipv6_configure->static_prefix64, 8);
}
}
return;
}
static void ws_bbr_dodag_get(uint8_t *local_prefix_ptr, uint8_t *global_prefix_ptr)
{
uint8_t global_address[16];
memset(global_prefix_ptr, 0, 8);
// By default static dodagID prefix is used as local prefix
memcpy(local_prefix_ptr, static_dodag_prefix, 8);
ws_bbr_bb_static_prefix_get(local_prefix_ptr);
if (arm_net_address_get(backbone_interface_id, ADDR_IPV6_GP, global_address) != 0) {
// No global prefix available
return;
}
protocol_interface_info_entry_t *bb_interface = protocol_stack_interface_info_get_by_id(backbone_interface_id);
if_address_entry_t *addr_entry = addr_get_entry(bb_interface, global_address);
if (!addr_entry || addr_entry->preferred_lifetime == 0) {
return;
}
//tr_debug("BBR address %s lifetime %d pref %d", trace_ipv6(addr_entry->address), addr_entry->valid_lifetime, addr_entry->preferred_lifetime);
if (memcmp(global_address, local_prefix_ptr, 8) == 0) {
// static prefix is same
return;
}
memcpy(global_prefix_ptr, global_address, 8);
return;
}
static void wisun_bbr_na_send(int8_t interface_id, const uint8_t target[static 16])
{
protocol_interface_info_entry_t *cur = protocol_stack_interface_info_get_by_id(interface_id);
if (!cur) {
return;
}
// Send NA only if it is enabled for the backhaul
if (!cur->send_na) {
return;
}
buffer_t *buffer = icmpv6_build_na(cur, false, true, true, target, NULL, ADDR_UNSPECIFIED);
protocol_push(buffer);
return;
}
static bool wisun_dhcp_address_add_cb(int8_t interfaceId, dhcp_address_cache_update_t *address_info, void *route_src)
{
(void)route_src;
protocol_interface_info_entry_t *curPtr = protocol_stack_interface_info_get_by_id(interfaceId);
if (!curPtr) {
return false;
}
// When address is allocated we send NA to backbone to notify the new address and flush from other BBRs
wisun_bbr_na_send(backbone_interface_id, address_info->allocatedAddress);
return true;
}
static void ws_bbr_dhcp_server_start(protocol_interface_info_entry_t *cur, uint8_t *global_id, uint32_t dhcp_address_lifetime)
{
uint8_t ll[16];
memcpy(ll, ADDR_LINK_LOCAL_PREFIX, 8);
memcpy(&ll[8], cur->mac, 8);
ll[8] ^= 2;
tr_debug("DHCP server activate %s", trace_ipv6_prefix(global_id, 64));
if (DHCPv6_server_service_init(cur->id, global_id, cur->mac, DHCPV6_DUID_HARDWARE_IEEE_802_NETWORKS_TYPE) != 0) {
tr_error("DHCPv6 Server create fail");
return;
}
DHCPv6_server_service_callback_set(cur->id, global_id, NULL, wisun_dhcp_address_add_cb);
//Enable SLAAC mode to border router
DHCPv6_server_service_set_address_autonous_flag(cur->id, global_id, true, false);
DHCPv6_server_service_set_address_validlifetime(cur->id, global_id, dhcp_address_lifetime);
//SEt max value for not limiting address allocation
DHCPv6_server_service_set_max_clients_accepts_count(cur->id, global_id, MAX_SUPPORTED_ADDRESS_LIST_SIZE);
ws_dhcp_client_address_request(cur, global_id, ll);
}
static void ws_bbr_dhcp_server_stop(protocol_interface_info_entry_t *cur, uint8_t *global_id)
{
if (!cur) {
return;
}
uint8_t temp_address[16];
memcpy(temp_address, global_id, 8);
memset(temp_address + 8, 0, 8);
tr_debug("DHCP server deactivate %s", trace_ipv6(temp_address));
DHCPv6_server_service_delete(cur->id, global_id, false);
//Delete Client
dhcp_client_global_address_delete(cur->id, NULL, temp_address);
}
static void ws_bbr_routing_stop(protocol_interface_info_entry_t *cur)
{
tr_info("BBR routing stop");
if (memcmp(current_local_prefix, ADDR_UNSPECIFIED, 8) != 0) {
ws_bbr_slaac_remove(cur, current_local_prefix);
memset(current_local_prefix, 0, 8);
}
if (memcmp(current_global_prefix, ADDR_UNSPECIFIED, 8) != 0) {
ws_bbr_dhcp_server_stop(cur, current_global_prefix);
if (backbone_interface_id >= 0) {
// Delete route to backbone if it exists
ipv6_route_add_with_info(current_global_prefix, 64, backbone_interface_id, NULL, ROUTE_THREAD_BBR, NULL, 0, 0, 0);
}
memset(current_global_prefix, 0, 8);
}
if (memcmp(current_dodag_id, ADDR_UNSPECIFIED, 8) != 0) {
ws_bbr_slaac_remove(cur, current_dodag_id);
memset(current_dodag_id, 0, 16);
}
ws_bbr_rpl_root_stop();
}
static void ws_bbr_rpl_status_check(protocol_interface_info_entry_t *cur)
{
uint8_t local_prefix[8] = {0};
uint8_t global_prefix[8] = {0};
//tr_info("BBR status check");
/*
* Start RPL Root
*/
if (!protocol_6lowpan_rpl_root_dodag) {
// Generate DODAGID
if (ws_bbr_static_dodagid_create(cur) == 0) {
ws_bbr_rpl_root_start(cur, current_dodag_id);
}
}
if (!protocol_6lowpan_rpl_root_dodag) {
// Failed to start
tr_err("BBR failed to start");
return;
}
/*
* Check that DODAGID is still valid
*/
if (protocol_interface_address_compare(current_dodag_id) != 0) {
//DODAGID is lost need to restart
tr_warn("DODAGID lost restart BBR");
ws_bbr_routing_stop(cur);
return;
}
ws_bbr_dodag_get(local_prefix, global_prefix);
tr_debug("BBR global %s, local %s", trace_ipv6_prefix(global_prefix, 64), trace_ipv6_prefix(local_prefix, 64));
/*
* Add default route to RPL
*/
if (configuration & BBR_DEFAULT_ROUTE) {
rpl_control_update_dodag_route(protocol_6lowpan_rpl_root_dodag, NULL, 0, 0, WS_ROUTE_LIFETIME, false);
}
/*
* Create static ULA configuration or modify if needed
*/
if ((configuration & BBR_ULA_C) &&
memcmp(current_local_prefix, local_prefix, 8) != 0) {
// Generate Static ULA
// Start static ULA prefix and routing always
if (memcmp(current_local_prefix, ADDR_UNSPECIFIED, 8) != 0) {
// Remove Old ULA prefix
ws_bbr_slaac_remove(cur, current_local_prefix);
rpl_control_update_dodag_prefix(protocol_6lowpan_rpl_root_dodag, current_local_prefix, 64, PIO_A, 0, 0, true);
memset(current_local_prefix, 0, 8);
}
if (memcmp(local_prefix, ADDR_UNSPECIFIED, 8) != 0) {
if (!ws_bbr_slaac_generate(cur, local_prefix)) {
// Address creation failed
return;
}
tr_info("RPL Local prefix activate %s", trace_ipv6_prefix(local_prefix, 64));
rpl_control_update_dodag_prefix(protocol_6lowpan_rpl_root_dodag, local_prefix, 64, PIO_A, WS_ULA_LIFETIME, WS_ULA_LIFETIME, false);
memcpy(current_local_prefix, local_prefix, 8);
}
}
/*
* Check if backup ULA prefix is needed
*/
if ((configuration & BBR_ULA_C) == 0 && memcmp(global_prefix, ADDR_UNSPECIFIED, 8) == 0) {
//Global prefix not available count if backup ULA should be created
global_prefix_unavailable_timer += BBR_CHECK_INTERVAL;
tr_debug("Check for backup prefix %"PRIu32"", global_prefix_unavailable_timer);
if (global_prefix_unavailable_timer >= BBR_BACKUP_ULA_DELAY) {
if (memcmp(current_global_prefix, ADDR_UNSPECIFIED, 8) == 0) {
tr_info("start using backup prefix %s", trace_ipv6_prefix(local_prefix, 64));
}
memcpy(global_prefix, local_prefix, 8);
}
} else {
//Global connection OK
global_prefix_unavailable_timer = 0;
}
/*
* Check for Global prefix
*/
if (memcmp(current_global_prefix, global_prefix, 8) != 0) {
// Global prefix changed
if (memcmp(current_global_prefix, ADDR_UNSPECIFIED, 8) != 0) {
// TODO remove old global prefix
tr_info("RPL global prefix deactivate %s", trace_ipv6_prefix(current_global_prefix, 64));
// Old backbone information is deleted after 120 seconds
rpl_control_update_dodag_prefix(protocol_6lowpan_rpl_root_dodag, current_global_prefix, 64, 0, 0, 0, true);
if (configuration & BBR_GUA_ROUTE) {
rpl_control_update_dodag_route(protocol_6lowpan_rpl_root_dodag, current_global_prefix, 64, 0, 0, true);
}
if (backbone_interface_id >= 0) {
ipv6_route_add_with_info(current_global_prefix, 64, backbone_interface_id, NULL, ROUTE_THREAD_BBR, NULL, 0, 120, 0);
}
ws_bbr_dhcp_server_stop(cur, current_global_prefix);
}
// TODO add global prefix
if (memcmp(global_prefix, ADDR_UNSPECIFIED, 8) != 0) {
tr_info("RPL global prefix activate %s", trace_ipv6_prefix(global_prefix, 64));
// Add default route to RPL
// Enable default routing to backbone
if (backbone_interface_id >= 0) {
if (ipv6_route_add_with_info(global_prefix, 64, backbone_interface_id, NULL, ROUTE_THREAD_BBR, NULL, 0, 0xffffffff, 0) == NULL) {
tr_err("global route add failed");
return;
}
}
ws_bbr_dhcp_server_start(cur, global_prefix, cur->ws_info->cfg->bbr.dhcp_address_lifetime);
rpl_control_update_dodag_prefix(protocol_6lowpan_rpl_root_dodag, global_prefix, 64, 0, 0, 0, false);
// no check for failure should have
if (configuration & BBR_GUA_ROUTE) {
// Add also global prefix and route to RPL
rpl_control_update_dodag_route(protocol_6lowpan_rpl_root_dodag, global_prefix, 64, 0, WS_ROUTE_LIFETIME, false);
}
}
memcpy(current_global_prefix, global_prefix, 8);
ws_bbr_rpl_version_increase(cur);
nd_proxy_downstream_interface_register(cur->id, ws_border_router_proxy_validate, ws_border_router_proxy_state_update);
} else if (memcmp(current_global_prefix, ADDR_UNSPECIFIED, 8) != 0) {
/*
* This is a keep alive validation RPL is updated to hold the real info.
* There is no status checks on prefix adds so this makes sure they are not lost
* DHCP validation should be done also
*/
rpl_control_update_dodag_prefix(protocol_6lowpan_rpl_root_dodag, current_global_prefix, 64, 0, 0, 0, false);
if (configuration & BBR_GUA_ROUTE) {
// Add also global prefix and route to RPL
rpl_control_update_dodag_route(protocol_6lowpan_rpl_root_dodag, current_global_prefix, 64, 0, WS_ROUTE_LIFETIME, false);
}
}
}
void ws_bbr_pan_version_increase(protocol_interface_info_entry_t *cur)
{
if (!cur) {
return;
}
tr_debug("Border router version number update");
if (configuration & BBR_REQUIRE_DAO_REFRESH) {
// Version number is not periodically increased forcing nodes to check Border router availability using DAO
pan_version_timer = 0;
} else {
pan_version_timer = cur->ws_info->cfg->timing.pan_timeout / PAN_VERSION_CHANGE_INTERVAL;
}
cur->ws_info->pan_information.pan_version++;
// Inconsistent for border router to make information distribute faster
ws_bootstrap_configuration_trickle_reset(cur);
// Indicate new pan version to PAE controller
ws_pae_controller_nw_info_set(cur, cur->ws_info->network_pan_id, cur->ws_info->pan_information.pan_version, cur->ws_info->cfg->gen.network_name);
}
void ws_bbr_seconds_timer(protocol_interface_info_entry_t *cur, uint32_t seconds)
{
(void)seconds;
if (!ws_info(cur)) {
return;
}
if (cur->bootsrap_mode != ARM_NWK_BOOTSRAP_MODE_6LoWPAN_BORDER_ROUTER) {
// Not a border router
return;
}
if (!cur->rpl_domain) {
// RPL not started
return;
}
if (bbr_delay_timer > seconds) {
bbr_delay_timer -= seconds;
} else {
bbr_delay_timer = BBR_CHECK_INTERVAL; // 20 second interval between status checks
// prequisists
// Wi-SUN network configuration started without RPL
// RPL configured simple
// 1. Wait for backend connection
// 2. When address becomes available in backend start RPL dodag
// 3. if address removed remove dodag
// RPL configured Advanced
// 1. Add ULA DODAG and and start ROOT even without backend
// a. If static prefix configured use it.
// b. generate random ULA and publish it to backend
// 2. if GUA prefix becomes available in backend add new prefix to DODAG
// 3. if GUA prefix is removed remove the prefix.
ws_bbr_rpl_status_check(cur);
}
// Normal BBR operation
if (protocol_6lowpan_rpl_root_dodag) {
/*
* PAN version change is one way to enable nodes to detect the border router availability
* if this is not done periodically devices need to have other means to detect border router condiftion
*
* If devices do not see version change they need to send DAO to border router before PAN timeout
*
* The update frequency should be related to PAN timeout and happen for example 4 times.
*/
if (pan_version_timer > 0) {
if (pan_version_timer > seconds) {
pan_version_timer -= seconds;
} else {
// PAN version number update
pan_version_timer = 0;
ws_bbr_pan_version_increase(cur);
}
}
if (cur->ws_info->rpl_version_timer > seconds) {
cur->ws_info->rpl_version_timer -= seconds;
} else {
// RPL version update needed
ws_bbr_rpl_version_increase(cur);
}
}
}
uint16_t test_pan_size_override = 0xffff;
uint16_t ws_bbr_pan_size(protocol_interface_info_entry_t *cur)
{
uint16_t result = 0;
if (!cur || !cur->rpl_domain) {
return 0;
}
if (test_pan_size_override != 0xffff) {
return test_pan_size_override;
}
//
const uint8_t *prefix_ptr;
if (memcmp(current_global_prefix, ADDR_UNSPECIFIED, 8) != 0) {
//Use GUA Prefix
prefix_ptr = current_global_prefix;
} else {
//Use ULA for indentifier
prefix_ptr = current_local_prefix;
}
rpl_control_get_instance_dao_target_count(cur->rpl_domain, current_instance_id, NULL, prefix_ptr, &result);
if (result > 0) {
// remove the Border router from the PAN size
result--;
}
return result;
}
bool ws_bbr_ready_to_start(protocol_interface_info_entry_t *cur)
{
(void)cur;
uint8_t global_address[16];
if (backbone_interface_id < 0) {
// No need to wait for backbone
return true;
}
if ((configuration & BBR_BB_WAIT) != BBR_BB_WAIT) {
// No need to wait for backbone
return true;
}
if (arm_net_address_get(backbone_interface_id, ADDR_IPV6_GP, global_address) != 0) {
// No global prefix available
return false;
}
return true;
}
#endif //HAVE_WS_BORDER_ROUTER
/* Public APIs
*
*/
int ws_bbr_start(int8_t interface_id, int8_t bb_interface_id)
{
#ifdef HAVE_WS_BORDER_ROUTER
(void)interface_id;
protocol_interface_info_entry_t *bb_interface = protocol_stack_interface_info_get_by_id(bb_interface_id);
if (!bb_interface) {
return -1;
}
// TODO make bb configurations
backbone_interface_id = bb_interface_id;
return 0;
#else
(void)interface_id;
(void)bb_interface_id;
return -1;
#endif
}
void ws_bbr_stop(int8_t interface_id)
{
#ifdef HAVE_WS_BORDER_ROUTER
protocol_interface_info_entry_t *cur = protocol_stack_interface_info_get_by_id(interface_id);
ws_bbr_routing_stop(cur);
backbone_interface_id = -1;
current_instance_id++;
#else
(void)interface_id;
#endif
}
int ws_bbr_configure(int8_t interface_id, uint16_t options)
{
#ifdef HAVE_WS_BORDER_ROUTER
protocol_interface_info_entry_t *cur = protocol_stack_interface_info_get_by_id(interface_id);
if (protocol_6lowpan_rpl_root_dodag &&
options != configuration) {
//Configuration changed delete previous setup
ws_bbr_routing_stop(cur);
}
configuration = options;
return 0;
#else
(void)interface_id;
(void)options;
return -1;
#endif
}
int ws_bbr_info_get(int8_t interface_id, bbr_information_t *info_ptr)
{
#ifdef HAVE_WS_BORDER_ROUTER
protocol_interface_info_entry_t *cur = protocol_stack_interface_info_get_by_id(interface_id);
rpl_dodag_info_t dodag_info;
if (!info_ptr) {
return -1;
}
if (!cur || !protocol_6lowpan_rpl_root_dodag) {
tr_warn("bbr not started");
return -1;
}
struct rpl_instance *instance = rpl_control_lookup_instance(protocol_6lowpan_rpl_domain, current_instance_id, current_dodag_id);
if (!instance) {
tr_warn("bbr instance not found");
return -2;
}
// Zero the structure
memset(info_ptr, 0, sizeof(bbr_information_t));
rpl_control_read_dodag_info(instance, &dodag_info);
memcpy(info_ptr->dodag_id, current_dodag_id, 16);
memcpy(info_ptr->prefix, current_global_prefix, 8);
// Get the Wi-SUN interface generated address that is used in the RF interface.
const uint8_t *wisun_if_addr = addr_select_with_prefix(cur, current_global_prefix, 64, SOCKET_IPV6_PREFER_SRC_PUBLIC);
if (wisun_if_addr) {
memcpy(info_ptr->IID, wisun_if_addr + 8, 8);
}
ipv6_route_t *next_hop = ipv6_route_choose_next_hop(ADDR_6TO4, backbone_interface_id, NULL);
if (next_hop) {
memcpy(info_ptr->gateway, next_hop->info.next_hop_addr, 16);
}
info_ptr->devices_in_network = ws_bbr_pan_size(cur);
info_ptr->instance_id = current_instance_id;
info_ptr->version = dodag_info.version_num;
info_ptr->timestamp = protocol_core_monotonic_time; // TODO switch to second timer
// consider DTSN included It can also be added for getting device information
// Consider own device API to get DTSN, DHCP lifetime values
return 0;
#else
(void) interface_id;
(void) info_ptr;
return -1;
#endif
}
int ws_bbr_routing_table_get(int8_t interface_id, bbr_route_info_t *table_ptr, uint16_t table_len)
{
#ifdef HAVE_WS_BORDER_ROUTER
protocol_interface_info_entry_t *cur = protocol_stack_interface_info_get_by_id(interface_id);
int length;
if (!cur || !protocol_6lowpan_rpl_root_dodag) {
return -1;
}
struct rpl_instance *instance = rpl_control_lookup_instance(protocol_6lowpan_rpl_domain, current_instance_id, current_dodag_id);
if (!instance) {
tr_warn("bbr instance not found");
return -2;
}
memset(table_ptr, 0, table_len);
/* RPL structure must match the external structure so we dont need to make conversion.
*
*/
length = rpl_control_route_table_get(instance, current_global_prefix, (rpl_route_info_t *)table_ptr, table_len);
return length;
#else
(void) interface_id;
(void) table_ptr;
(void) table_len;
return -1;
#endif
}
int ws_bbr_node_keys_remove(int8_t interface_id, uint8_t *eui64)
{
(void) interface_id;
(void) eui64;
#ifdef HAVE_WS_BORDER_ROUTER
return ws_pae_controller_node_keys_remove(interface_id, eui64);
#else
return -1;
#endif
}
int ws_bbr_node_access_revoke_start(int8_t interface_id)
{
(void) interface_id;
#ifdef HAVE_WS_BORDER_ROUTER
return ws_pae_controller_node_access_revoke_start(interface_id);
#else
return -1;
#endif
}
int ws_bbr_eapol_node_limit_set(int8_t interface_id, uint16_t limit)
{
(void) interface_id;
#ifdef HAVE_WS_BORDER_ROUTER
return ws_pae_controller_node_limit_set(interface_id, limit);
#else
(void) limit;
return -1;
#endif
}
int ws_bbr_ext_certificate_validation_set(int8_t interface_id, uint8_t validation)
{
(void) interface_id;
#ifdef HAVE_WS_BORDER_ROUTER
bool enabled = false;
if (validation & BBR_CRT_EXT_VALID_WISUN) {
enabled = true;
}
return ws_pae_controller_ext_certificate_validation_set(interface_id, enabled);
#else
(void) validation;
return -1;
#endif
}
int ws_bbr_rpl_parameters_set(int8_t interface_id, uint8_t dio_interval_min, uint8_t dio_interval_doublings, uint8_t dio_redundancy_constant)
{
(void) interface_id;
#ifdef HAVE_WS_BORDER_ROUTER
protocol_interface_info_entry_t *cur = protocol_stack_interface_info_get_by_id(interface_id);
ws_bbr_cfg_t cfg;
if (ws_cfg_bbr_get(&cfg, NULL) < 0) {
return -1;
}
if (dio_interval_min > 0) {
cfg.dio_interval_min = dio_interval_min;
}
if (dio_interval_doublings > 0) {
cfg.dio_interval_doublings = dio_interval_doublings;
}
if (dio_redundancy_constant != 0xff) {
cfg.dio_redundancy_constant = dio_redundancy_constant;
}
if (ws_cfg_bbr_set(cur, NULL, &cfg, 0) < 0) {
return -2;
}
return 0;
#else
(void) dio_interval_min;
(void) dio_interval_doublings;
(void) dio_redundancy_constant;
return -1;
#endif
}
int ws_bbr_rpl_parameters_get(int8_t interface_id, uint8_t *dio_interval_min, uint8_t *dio_interval_doublings, uint8_t *dio_redundancy_constant)
{
(void) interface_id;
#ifdef HAVE_WS_BORDER_ROUTER
if (!dio_interval_min || !dio_interval_doublings || !dio_redundancy_constant) {
return -1;
}
ws_bbr_cfg_t cfg;
if (ws_cfg_bbr_get(&cfg, NULL) < 0) {
return -2;
}
*dio_interval_min = cfg.dio_interval_min;
*dio_interval_doublings = cfg.dio_interval_doublings;
*dio_redundancy_constant = cfg.dio_redundancy_constant;
return 0;
#else
(void) dio_interval_min;
(void) dio_interval_doublings;
(void) dio_redundancy_constant;
return -1;
#endif
}
int ws_bbr_rpl_parameters_validate(int8_t interface_id, uint8_t dio_interval_min, uint8_t dio_interval_doublings, uint8_t dio_redundancy_constant)
{
(void) interface_id;
#ifdef HAVE_WS_BORDER_ROUTER
ws_bbr_cfg_t cfg;
if (ws_cfg_bbr_get(&cfg, NULL) < 0) {
return -2;
}
if (dio_interval_min > 0) {
cfg.dio_interval_min = dio_interval_min;
}
if (dio_interval_doublings > 0) {
cfg.dio_interval_doublings = dio_interval_doublings;
}
if (dio_redundancy_constant != 0xff) {
cfg.dio_redundancy_constant = dio_redundancy_constant;
}
if (ws_cfg_bbr_validate(NULL, &cfg) < 0) {
return -3;
}
return 0;
#else
(void) dio_interval_min;
(void) dio_interval_doublings;
(void) dio_redundancy_constant;
return -1;
#endif
}
int ws_bbr_pan_configuration_set(int8_t interface_id, uint16_t pan_id)
{
(void) interface_id;
#ifdef HAVE_WS_BORDER_ROUTER
protocol_interface_info_entry_t *cur = protocol_stack_interface_info_get_by_id(interface_id);
ws_gen_cfg_t cfg;
if (ws_cfg_gen_get(&cfg, NULL) < 0) {
return -1;
}
cfg.network_pan_id = pan_id;
if (ws_cfg_gen_set(cur, NULL, &cfg, 0) < 0) {
return -2;
}
return 0;
#else
(void) pan_id;
return -1;
#endif
}
int ws_bbr_pan_configuration_get(int8_t interface_id, uint16_t *pan_id)
{
(void) interface_id;
#ifdef HAVE_WS_BORDER_ROUTER
if (!pan_id) {
return -1;
}
ws_gen_cfg_t cfg;
if (ws_cfg_gen_get(&cfg, NULL) < 0) {
return -2;
}
*pan_id = cfg.network_pan_id;
return 0;
#else
(void) pan_id;
return -1;
#endif
}
int ws_bbr_pan_configuration_validate(int8_t interface_id, uint16_t pan_id)
{
(void) interface_id;
#ifdef HAVE_WS_BORDER_ROUTER
ws_gen_cfg_t cfg;
if (ws_cfg_gen_get(&cfg, NULL) < 0) {
return -1;
}
cfg.network_pan_id = pan_id;
if (ws_cfg_gen_validate(NULL, &cfg) < 0) {
return -2;
}
return 0;
#else
(void) pan_id;
return -1;
#endif
}
int ws_bbr_key_storage_memory_set(int8_t interface_id, uint8_t key_storages_number, const uint16_t *key_storage_size, void **key_storages)
{
(void) interface_id;
#ifdef HAVE_WS_BORDER_ROUTER
return ws_pae_key_storage_memory_set(key_storages_number, key_storage_size, key_storages);
#else
(void) key_storages_number;
(void) key_storage_size;
(void) key_storages;
return -1;
#endif
}
int ws_bbr_key_storage_settings_set(int8_t interface_id, uint8_t alloc_max_number, uint16_t alloc_size, uint16_t storing_interval)
{
(void) interface_id;
#ifdef HAVE_WS_BORDER_ROUTER
return ws_pae_key_storage_settings_set(alloc_max_number, alloc_size, storing_interval);
#else
(void) alloc_max_number;
(void) alloc_size;
(void) storing_interval;
return -1;
#endif
}
int ws_bbr_radius_address_set(int8_t interface_id, const uint8_t *address)
{
#ifdef HAVE_WS_BORDER_ROUTER
return ws_pae_controller_radius_address_set(interface_id, address);
#else
(void) interface_id;
(void) address;
return -1;
#endif
}
int ws_bbr_radius_address_get(int8_t interface_id, uint8_t *address)
{
#ifdef HAVE_WS_BORDER_ROUTER
return ws_pae_controller_radius_address_get(interface_id, address);
#else
(void) interface_id;
(void) address;
return -1;
#endif
}
int ws_bbr_radius_shared_secret_set(int8_t interface_id, const uint16_t shared_secret_len, const uint8_t *shared_secret)
{
#ifdef HAVE_WS_BORDER_ROUTER
return ws_pae_controller_radius_shared_secret_set(interface_id, shared_secret_len, shared_secret);
#else
(void) interface_id;
(void) shared_secret_len;
(void) shared_secret;
return -1;
#endif
}
int ws_bbr_radius_shared_secret_get(int8_t interface_id, uint16_t *shared_secret_len, uint8_t *shared_secret)
{
#ifdef HAVE_WS_BORDER_ROUTER
return ws_pae_controller_radius_shared_secret_get(interface_id, shared_secret_len, shared_secret);
#else
(void) interface_id;
(void) shared_secret_len;
(void) shared_secret;
return -1;
#endif
}
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