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mbed-os/features/nanostack/sal-stack-nanostack/source/6LoWPAN/Bootstraps/Generic/protocol_6lowpan.c

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/*
* Copyright (c) 2013-2021, Pelion 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 "nsconfig.h"
#include "string.h"
#include "ns_types.h"
#include "eventOS_event.h"
#include "eventOS_scheduler.h"
#include "ns_trace.h"
#include "nsdynmemLIB.h"
#include "Core/include/ns_socket.h"
#include "NWK_INTERFACE/Include/protocol.h"
#include "Common_Protocols/udp.h"
#include "Common_Protocols/ipv6.h"
#include "Common_Protocols/icmpv6.h"
#include "6LoWPAN/Bootstraps/protocol_6lowpan.h"
#include "6LoWPAN/Bootstraps/protocol_6lowpan_bootstrap.h"
#include "6LoWPAN/ND/nd_router_object.h"
#ifdef HAVE_RPL
#include "RPL/rpl_control.h"
#include "RPL/rpl_data.h"
#include "RPL/rpl_protocol.h"
#endif
#include "6LoWPAN/IPHC_Decode/cipv6.h"
#include "6LoWPAN/ND/nd_router_object.h"
#ifndef NO_MLE
#include "MLE/mle.h"
#endif
#include "6LoWPAN/Mesh/mesh.h"
#include "6LoWPAN/Thread/thread_common.h"
#include "6LoWPAN/Thread/thread_nd.h"
#include "6LoWPAN/MAC/mac_helper.h"
#ifdef ECC
#include "libX509_V3.h"
#include "ecc.h"
#endif
#include "ccmLIB.h"
#include "shalib.h"
#include "Security/TLS/tls_lib.h"
#include "Security/Common/sec_lib.h"
#include "net_nvm_api.h"
#include "Security/PANA/pana.h"
#include "Security/PANA/pana_internal_api.h"
#include "Common_Protocols/tcp.h"
#include "randLIB.h"
#include "6LoWPAN/ND/nd_router_object.h"
#include "common_functions.h"
#include "BorderRouter/border_router.h"
#include "net_rpl.h"
#ifdef HAVE_RPL
#ifndef NO_MLE
#include "NWK_INTERFACE/Include/protocol_stats.h"
#endif
#endif
#include "sw_mac.h"
#include "6LoWPAN/MAC/mac_data_poll.h"
#include "6LoWPAN/MAC/mpx_api.h"
#include "6LoWPAN/lowpan_adaptation_interface.h"
#include "6LoWPAN/Fragmentation/cipv6_fragmenter.h"
#include "Service_Libs/etx/etx.h"
#include "Service_Libs/mac_neighbor_table/mac_neighbor_table.h"
#include "6LoWPAN/ws/ws_common.h"
#ifdef HAVE_WS
#include "6LoWPAN/ws/ws_cfg_settings.h"
#endif
#define TRACE_GROUP_LOWPAN "6lo"
#define TRACE_GROUP "6lo"
/* Data rate for application used in Stagger calculation */
#define STAGGER_DATARATE_FOR_APPL(n) ((n)*75/100)
/* Time after network is considered stable and smaller stagger values can be given*/
#define STAGGER_STABLE_NETWORK_TIME 3600*4
#ifdef HAVE_RPL
rpl_domain_t *protocol_6lowpan_rpl_domain;
/* Having to sidestep old rpl_dodag_t type for the moment */
struct rpl_dodag *protocol_6lowpan_rpl_root_dodag;
#endif
static uint8_t protocol_buffer_valid(buffer_t *b, protocol_interface_info_entry_t *cur)
{
uint8_t valid = 1;
if (cur) {
if ((b->info & B_TO_MAC_MLME_MASK) != B_TO_MAC_FROM_MAC) {
if (cur->lowpan_info & INTERFACE_NWK_ACTIVE) {
//if((power_save_state & (SLEEP_MODE_REQ | ICMP_ACTIVE)) == SLEEP_MODE_REQ)
if (check_power_state(SLEEP_MODE_REQ | ICMP_ACTIVE) == SLEEP_MODE_REQ) {
/* STill active but Sleep Req and ICMP is not ACTIVE */
valid = 0;
}
} else {
/* Set Clean Core Becauce Protocol Is not Active */
valid = 0;
}
}
} else {
valid = 0;
}
return valid;
}
void protocol_init(void)
{
tr_debug("P.Init");
#ifdef PANA
sec_libray_init();
#endif
#ifdef HAVE_RPL
protocol_6lowpan_rpl_domain = rpl_control_create_domain();
#endif
#ifdef HAVE_WS
ws_cfg_settings_init();
#endif
}
void protocol_6lowpan_stack(buffer_t *b)
{
protocol_interface_info_entry_t *cur = b->interface;
if (protocol_buffer_valid(b, cur) == 0) {
tr_debug("Drop Packets");
buffer_free(b);
return;
}
/* Protocol Buffer Handle until Buffer Go out from Stack */
while (b) {
/* Buffer Direction Select Switch */
if ((b->info & B_DIR_MASK) == B_DIR_DOWN) {
/* Direction DOWN */
switch (b->info & B_TO_MASK) {
case B_TO_ICMP:
/* Build ICMP Header */
b = icmpv6_down(b);
break;
case B_TO_UDP:
/* Build UDP Header */
b = udp_down(b);
break;
case B_TO_IPV6:
/* Build IP header */
b = ipv6_down(b);
break;
case B_TO_IPV6_FWD:
/* IPv6 forwarding */
b = ipv6_forwarding_down(b);
break;
case B_TO_IPV6_TXRX:
/* Resolution, Compress IP header */
b = lowpan_down(b);
break;
#ifdef HAVE_MESH
case B_TO_MESH_ROUTING:
/* Add mesh header */
b = mesh_down(b);
break;
#endif
case B_TO_MAC:
/* no break */
case B_TO_PHY:
b = lowpan_adaptation_data_process_tx_preprocess(cur, b);
if (lowpan_adaptation_interface_tx(cur, b) != 0) {
tr_error("Adaptation Layer Data req fail");
}
b = NULL;
break;
default:
b = buffer_free(b);
break;
}
} else {
/* Direction UP */
switch (b->info & B_TO_MASK) {
case B_TO_APP:
/* Push Socket Interface */
socket_up(b);
b = NULL;
break;
case B_TO_ICMP:
/* Parse ICMP Message */
b = icmpv6_up(b);
break;
case B_TO_FRAGMENTATION:
/* Packet Reasemley */
b = cipv6_frag_reassembly(cur->id, b);
break;
case B_TO_UDP:
/* Parse UDP Message */
b = udp_up(b);
break;
case B_TO_IPV6_FWD:
/* Handle IP Payload */
b = ipv6_forwarding_up(b);
break;
case B_TO_IPV6_TXRX:
/* Handle MAC Payload */
b = lowpan_up(b);
break;
#ifdef HAVE_MESH
case B_TO_MESH_ROUTING:
/* Handle Mesh header */
b = mesh_up(b);
break;
#endif
case B_TO_TCP:
b = tcp_up(b);
break;
default:
tr_debug("LLL");
b = buffer_free(b);
break;
}
}
if (b) {
//Check If Stack forward packet to different interface
if (b->interface != cur) {
protocol_push(b);
b = 0;
}
}
}
}
/* Return length of option always, and write option if opt_out != NULL */
static uint8_t protocol_6lowpan_llao_write(protocol_interface_info_entry_t *cur, uint8_t *opt_out, uint8_t opt_type, bool must, const uint8_t *ip_addr)
{
/* Don't bother including optional LLAO if it's a link-local address -
* they should be mapping anyway.
*/
if (!must && addr_is_ipv6_link_local(ip_addr)) {
return 0;
}
uint16_t mac16 = mac_helper_mac16_address_get(cur);
/* Even if we have a short address, use long address if the IP address's IID matches it */
if (mac16 >= 0xfffe || addr_iid_matches_eui64(ip_addr + 8, cur->mac)) {
if (opt_out) {
opt_out[0] = opt_type;
opt_out[1] = 2;
memcpy(opt_out + 2, cur->mac, 8);
memset(opt_out + 10, 0, 6);
}
return 16;
} else {
if (opt_out) {
opt_out[0] = opt_type;
opt_out[1] = 1;
common_write_16_bit(mac16, opt_out + 2);
memset(opt_out + 4, 0, 4);
}
return 8;
}
}
/* Parse, and return actual size, or 0 if error */
static uint8_t protocol_6lowpan_llao_parse(protocol_interface_info_entry_t *cur, const uint8_t *opt_in, sockaddr_t *ll_addr_out)
{
common_write_16_bit(cur->mac_parameters->pan_id, ll_addr_out->address + 0);
switch (opt_in[1]) {
case 1:
ll_addr_out->addr_type = ADDR_802_15_4_SHORT;
memcpy(ll_addr_out->address + 2, opt_in + 2, 2);
return 2 + 2;
case 2:
ll_addr_out->addr_type = ADDR_802_15_4_LONG;
memcpy(ll_addr_out->address + 2, opt_in + 2, 8);
return 2 + 8;
default:
return 0;
}
}
static bool protocol_6lowpan_map_ip_to_link_addr(protocol_interface_info_entry_t *cur, const uint8_t *ip_addr, addrtype_t *ll_type, const uint8_t **ll_addr_out)
{
static uint8_t ll_addr[10];
*ll_type = ADDR_NONE;
/* RFC 6775 says link-local addresses are based on extended MAC (LL64) */
/* ZigBee IP and Thread both also have link-local addresses based on short MAC (LL16) */
/* Our old IP stack assumed all addresses were based on MAC; this is available as an option */
if (cur->iids_map_to_mac || addr_is_ipv6_link_local(ip_addr)) {
if (memcmp(&ip_addr[8], ADDR_SHORT_ADR_SUFFIC, 6) == 0) {
*ll_type = ADDR_802_15_4_SHORT;
memcpy(&ll_addr[2], &ip_addr[14], 2);
} else {
*ll_type = ADDR_802_15_4_LONG;
memcpy(&ll_addr[2], &ip_addr[8], 8);
ll_addr[2] ^= 2;
}
} else if (thread_addr_is_mesh_local(ip_addr, cur)) {
if (memcmp(&ip_addr[8], ADDR_SHORT_ADR_SUFFIC, 6) == 0) {
/* Thread ML16s map directly to MAC (mesh) short */
*ll_type = ADDR_802_15_4_SHORT;
memcpy(&ll_addr[2], &ip_addr[14], 2);
}
}
if (*ll_type != ADDR_NONE) {
common_write_16_bit(cur->mac_parameters->pan_id, &ll_addr[0]);
*ll_addr_out = ll_addr;
return true;
} else {
return false;
}
}
static bool protocol_6lowpan_map_link_addr_to_ip(protocol_interface_info_entry_t *cur, addrtype_t ll_type, const uint8_t *ll_addr, uint8_t *ip_addr_out)
{
(void)cur;
switch (ll_type) {
case ADDR_802_15_4_LONG:
memcpy(ip_addr_out, ADDR_LINK_LOCAL_PREFIX, 8);
memcpy(ip_addr_out + 8, ll_addr + 2, 8);
ip_addr_out[8] ^= 0x02;
return true;
case ADDR_802_15_4_SHORT:
if (common_read_16_bit(ll_addr + 2) > 0xfffd) {
return false;
}
memcpy(ip_addr_out, ADDR_LINK_LOCAL_PREFIX, 8);
memcpy(ip_addr_out + 8, ADDR_SHORT_ADR_SUFFIC, 6);
memcpy(ip_addr_out + 14, ll_addr + 2, 2);
return true;
default:
return false;
}
}
void protocol_6lowpan_host_init(protocol_interface_info_entry_t *cur, bool sleepy_host)
{
if (sleepy_host) {
cur->bootsrap_mode = ARM_NWK_BOOTSRAP_MODE_6LoWPAN_SLEEPY_HOST;
} else {
cur->bootsrap_mode = ARM_NWK_BOOTSRAP_MODE_6LoWPAN_HOST;
}
//Clear always INTERFACE_NWK_ROUTER_DEVICE, INTERFACE_NWK_CONF_MAC_RX_OFF_IDLE
cur->lowpan_info &= ~(INTERFACE_NWK_ROUTER_DEVICE | INTERFACE_NWK_CONF_MAC_RX_OFF_IDLE);
mac_helper_pib_boolean_set(cur, macRxOnWhenIdle, true);
mac_data_poll_init(cur);
arm_nwk_6lowpan_borderrouter_data_free(cur);
}
void protocol_6lowpan_router_init(protocol_interface_info_entry_t *cur)
{
cur->bootsrap_mode = ARM_NWK_BOOTSRAP_MODE_6LoWPAN_ROUTER;
cur->lowpan_info |= INTERFACE_NWK_ROUTER_DEVICE;
cur->lowpan_info &= ~INTERFACE_NWK_CONF_MAC_RX_OFF_IDLE;
mac_data_poll_init(cur);
arm_nwk_6lowpan_borderrouter_data_free(cur);
}
void protocol_6lowpan_configure_core(protocol_interface_info_entry_t *cur)
{
cur->dup_addr_detect_transmits = 0;
cur->ipv6_neighbour_cache.max_ll_len = 2 + 8;
cur->ipv6_neighbour_cache.link_mtu = LOWPAN_MTU;
#ifdef HAVE_6LOWPAN_ND
cur->ipv6_neighbour_cache.send_nud_probes = nd_params.send_nud_probes;
cur->ipv6_neighbour_cache.probe_avoided_routers = nd_params.send_nud_probes;
cur->iids_map_to_mac = nd_params.iids_map_to_mac;
#endif
cur->ip_multicast_as_mac_unicast_to_parent = false;
cur->max_link_mtu = LOWPAN_MAX_MTU;
cur->send_mld = false;
#ifdef HAVE_6LOWPAN_ND
nd_6lowpan_set_radv_params(cur);
#endif
}
void protocol_6lowpan_register_handlers(protocol_interface_info_entry_t *cur)
{
cur->if_stack_buffer_handler = protocol_6lowpan_stack;
cur->if_llao_parse = protocol_6lowpan_llao_parse;
cur->if_llao_write = protocol_6lowpan_llao_write;
cur->if_map_ip_to_link_addr = protocol_6lowpan_map_ip_to_link_addr;
cur->if_map_link_addr_to_ip = protocol_6lowpan_map_link_addr_to_ip;
if (cur->bootsrap_mode == ARM_NWK_BOOTSRAP_MODE_6LoWPAN_BORDER_ROUTER ||
cur->bootsrap_mode == ARM_NWK_BOOTSRAP_MODE_6LoWPAN_ROUTER) {
cur->ipv6_neighbour_cache.recv_addr_reg = true;
cur->ipv6_neighbour_cache.recv_ns_aro = true;
}
/* Always send AROs, (compulsory for hosts, and "SHOULD" in RFC 6557 6.5.5
* for routers, as RPL doesn't deal with it) */
cur->ipv6_neighbour_cache.send_addr_reg = true;
cur->ipv6_neighbour_cache.recv_na_aro = true;
cur->ipv6_neighbour_cache.use_eui64_as_slla_in_aro = false;
}
void protocol_6lowpan_release_short_link_address_from_neighcache(protocol_interface_info_entry_t *cur, uint16_t shortAddress)
{
uint8_t temp_ll[4];
uint8_t *ptr = temp_ll;
ptr = common_write_16_bit(cur->mac_parameters->pan_id, ptr);
ptr = common_write_16_bit(shortAddress, ptr);
ipv6_neighbour_invalidate_ll_addr(&cur->ipv6_neighbour_cache,
ADDR_802_15_4_SHORT, temp_ll);
if (thread_info(cur)) {
thread_nd_address_remove(cur, ADDR_802_15_4_SHORT, temp_ll);
} else {
nd_remove_registration(cur, ADDR_802_15_4_SHORT, temp_ll);
}
}
void protocol_6lowpan_release_long_link_address_from_neighcache(protocol_interface_info_entry_t *cur, uint8_t *mac64)
{
uint8_t temp_ll[10];
uint8_t *ptr = temp_ll;
ptr = common_write_16_bit(cur->mac_parameters->pan_id, ptr);
memcpy(ptr, mac64, 8);
ipv6_neighbour_invalidate_ll_addr(&cur->ipv6_neighbour_cache,
ADDR_802_15_4_LONG, temp_ll);
if (thread_info(cur)) {
thread_nd_address_remove(cur, ADDR_802_15_4_LONG, temp_ll);
} else {
nd_remove_registration(cur, ADDR_802_15_4_LONG, temp_ll);
}
}
#ifdef HAVE_6LOWPAN_ND
static int8_t mle_set_link_priority(protocol_interface_info_entry_t *cur, const uint8_t *address, bool priority)
{
uint8_t mac64[8];
mac_neighbor_table_entry_t *entry;
if (!memcmp(address, ADDR_SHORT_ADR_SUFFIC, 6)) {
entry = mac_neighbor_table_address_discover(mac_neighbor_info(cur), address + 6, ADDR_802_15_4_SHORT);
} else {
memcpy(mac64, address, 8);
mac64[0] ^= 2;
entry = mac_neighbor_table_address_discover(mac_neighbor_info(cur), mac64, ADDR_802_15_4_LONG);
}
if (!entry) {
return -1;
}
if (priority) {
entry->link_role = PRIORITY_PARENT_NEIGHBOUR;
} else {
entry->link_role = NORMAL_NEIGHBOUR;
}
return 0;
}
void protocol_6lowpan_neighbor_priority_update(protocol_interface_info_entry_t *cur, uint8_t *removed_priority, uint8_t *updated_priority)
{
if (cur->lowpan_info & INTERFACE_NWK_BOOTSRAP_MLE) {
#ifndef NO_MLE
if (removed_priority) {
mle_set_link_priority(cur, removed_priority, false);
}
if (updated_priority) {
mle_set_link_priority(cur, updated_priority, true);
}
#endif
}
}
#ifdef HAVE_RPL
uint16_t protocol_6lowpan_neighbor_priority_set(int8_t interface_id, addrtype_t addr_type, const uint8_t *addr_ptr)
{
protocol_interface_info_entry_t *cur = protocol_stack_interface_info_get_by_id(interface_id);
if (!cur || !addr_ptr) {
return 0;
}
mac_neighbor_table_entry_t *entry = mac_neighbor_table_address_discover(mac_neighbor_info(cur), addr_ptr + PAN_ID_LEN, addr_type);
if (entry) {
bool new_primary = false;
etx_storage_t *etx_entry = etx_storage_entry_get(interface_id, entry->index);
// If primary parent has changed clears priority from previous parent
if (entry->link_role != PRIORITY_PARENT_NEIGHBOUR) {
new_primary = true;
protocol_6lowpan_neighbor_priority_clear_all(interface_id, PRIORITY_1ST);
}
entry->link_role = PRIORITY_PARENT_NEIGHBOUR;
uint8_t temp[2];
common_write_16_bit(entry->mac16, temp);
mac_helper_coordinator_address_set(cur, ADDR_802_15_4_SHORT, temp);
mac_helper_coordinator_address_set(cur, ADDR_802_15_4_LONG, entry->mac64);
if (etx_entry) {
protocol_stats_update(STATS_ETX_1ST_PARENT, etx_entry->etx >> 4);
}
if (new_primary) {
ws_common_primary_parent_update(cur, entry);
}
return 1;
} else {
return 0;
}
}
uint16_t protocol_6lowpan_neighbor_second_priority_set(int8_t interface_id, addrtype_t addr_type, const uint8_t *addr_ptr)
{
protocol_interface_info_entry_t *cur = protocol_stack_interface_info_get_by_id(interface_id);
if (!cur || !addr_ptr) {
return 0;
}
mac_neighbor_table_entry_t *entry = mac_neighbor_table_address_discover(mac_neighbor_info(cur), addr_ptr + PAN_ID_LEN, addr_type);
if (entry) {
bool new_secondary = false;
etx_storage_t *etx_entry = etx_storage_entry_get(interface_id, entry->index);
// If secondary parent has changed clears priority from previous parent
if (entry->link_role != SECONDARY_PARENT_NEIGHBOUR) {
new_secondary = true;
protocol_6lowpan_neighbor_priority_clear_all(interface_id, PRIORITY_2ND);
}
entry->link_role = SECONDARY_PARENT_NEIGHBOUR;
if (etx_entry) {
protocol_stats_update(STATS_ETX_2ND_PARENT, etx_entry->etx >> 4);
}
if (new_secondary) {
ws_common_secondary_parent_update(cur);
}
return 1;
} else {
return 0;
}
}
void protocol_6lowpan_neighbor_priority_clear_all(int8_t interface_id, neighbor_priority priority)
{
protocol_interface_info_entry_t *cur = protocol_stack_interface_info_get_by_id(interface_id);
if (!cur) {
return;
}
mac_neighbor_table_list_t *mac_table_list = &mac_neighbor_info(cur)->neighbour_list;
ns_list_foreach(mac_neighbor_table_entry_t, entry, mac_table_list) {
if (priority == PRIORITY_1ST && entry->link_role == PRIORITY_PARENT_NEIGHBOUR) {
entry->link_role = NORMAL_NEIGHBOUR;
} else {
if (entry->link_role == SECONDARY_PARENT_NEIGHBOUR) {
protocol_stats_update(STATS_ETX_2ND_PARENT, 0);
entry->link_role = NORMAL_NEIGHBOUR;
}
}
}
}
#endif
#endif
int8_t protocol_6lowpan_neighbor_address_state_synch(protocol_interface_info_entry_t *cur, const uint8_t eui64[8], const uint8_t iid[8])
{
int8_t ret_val = -1;
mac_neighbor_table_entry_t *entry = mac_neighbor_table_address_discover(mac_neighbor_info(cur), eui64, ADDR_802_15_4_LONG);
if (entry) {
if (memcmp(iid, ADDR_SHORT_ADR_SUFFIC, 6) == 0) {
iid += 6;
//Set Short Address to MLE
entry->mac16 = common_read_16_bit(iid);
}
if (!entry->ffd_device) {
if (entry->connected_device) {
mac_neighbor_table_neighbor_refresh(mac_neighbor_info(cur), entry, entry->link_lifetime);
}
ret_val = 1;
} else {
ret_val = 0;
}
}
return ret_val;
}
int8_t protocol_6lowpan_neighbor_remove(protocol_interface_info_entry_t *cur, uint8_t *address_ptr, addrtype_t type)
{
mac_neighbor_table_entry_t *entry = mac_neighbor_table_address_discover(mac_neighbor_info(cur), address_ptr, type);
if (entry) {
mac_neighbor_table_neighbor_remove(mac_neighbor_info(cur), entry);
}
return 0;
}
void protocol_6lowpan_allocate_mac16(protocol_interface_info_entry_t *cur)
{
if (cur) {
cur->lowpan_desired_short_address = (randLIB_get_16bit() & 0x7fff);
}
}
void protocol_6lowpan_interface_common_init(protocol_interface_info_entry_t *cur)
{
cur->lowpan_info |= INTERFACE_NWK_ACTIVE;
protocol_6lowpan_register_handlers(cur);
ipv6_route_add(ADDR_LINK_LOCAL_PREFIX, 64, cur->id, NULL, ROUTE_STATIC, 0xFFFFFFFF, 0);
// Putting a multicast route to ff00::/8 makes sure we can always transmit multicast.
// Interface metric will determine which interface is actually used, if we have multiple.
ipv6_route_add(ADDR_LINK_LOCAL_ALL_NODES, 8, cur->id, NULL, ROUTE_STATIC, 0xFFFFFFFF, -1);
}
int8_t protocol_6lowpan_interface_compare_cordinator_netid(protocol_interface_info_entry_t *cur, uint8_t *adr_ptr)
{
int8_t ret_val = -1;
if (cur) {
addrtype_t addrType;
uint8_t tempAddress[8];
addrType = mac_helper_coordinator_address_get(cur, tempAddress);
if (addrType == ADDR_802_15_4_LONG) {
tempAddress[0] ^= 2;
if (memcmp(adr_ptr, tempAddress, 8) == 0) {
ret_val = 0;
}
} else if (addrType == ADDR_802_15_4_SHORT) {
if (adr_ptr[6] == tempAddress[0] && adr_ptr[7] == tempAddress[1]) {
ret_val = 0;
}
}
}
return ret_val;
}
int8_t protocol_6lowpan_interface_get_link_local_cordinator_address(protocol_interface_info_entry_t *cur, uint8_t *adr_ptr)
{
addrtype_t addrType;
uint8_t tempAddress[8];
addrType = mac_helper_coordinator_address_get(cur, tempAddress);
if (addrType == ADDR_NONE) {
return -1;
}
memcpy(adr_ptr, ADDR_LINK_LOCAL_PREFIX, 8);
adr_ptr += 8;
if (addrType == ADDR_802_15_4_LONG) {
tempAddress[0] ^= 2;
memcpy(adr_ptr, tempAddress, 8);
} else {
memcpy(adr_ptr, ADDR_SHORT_ADR_SUFFIC, 6);
adr_ptr += 6;
*adr_ptr++ = tempAddress[0];
*adr_ptr = tempAddress[1];
}
return 0;
}
int8_t protocol_6lowpan_interface_get_mac_coordinator_address(protocol_interface_info_entry_t *cur, sockaddr_t *adr_ptr)
{
common_write_16_bit(cur->mac_parameters->pan_id, adr_ptr->address + 0);
adr_ptr->addr_type = mac_helper_coordinator_address_get(cur, adr_ptr->address + 2);
if (adr_ptr->addr_type == ADDR_NONE) {
return -1;
}
return 0;
}
int16_t protocol_6lowpan_rpl_global_priority_get(void)
{
#ifdef HAVE_RPL
uint8_t instance_id_list[10];
uint8_t rpl_instance_count;
uint8_t instance_id = RPL_INSTANCE_LOCAL;
uint8_t instance_id_new;
uint8_t instance_index;
rpl_instance_count = rpl_instance_list_read(&instance_id_list[0], sizeof(instance_id_list));
/* Find lowest global instance ID (assumption: RPL instance with lowest instance ID has
most generic routing rule and its rank should be indicated in beacon) */
for (instance_index = 0; instance_index < rpl_instance_count; instance_index++) {
instance_id_new = instance_id_list[instance_index];
if ((instance_id_new & RPL_INSTANCE_LOCAL) == RPL_INSTANCE_LOCAL) {
break;
} else {
if (instance_id_new < instance_id) {
instance_id = instance_id_new;
}
}
}
// Get DAG rank
if (instance_id == RPL_INSTANCE_LOCAL) {
return 255;
}
rpl_dodag_info_t rpl_dodag_info;
if (!rpl_read_dodag_info(&rpl_dodag_info, instance_id)) {
return 255;
}
if (rpl_dodag_info.curent_rank == RPL_RANK_INFINITE) {
return 255;
}
// Default implementation is
// 32 * (7 - DODAGPreference) + 3 * (DAGRank - 1)
int16_t priority;
priority = 32 * (7 - RPL_DODAG_PREF(rpl_dodag_info.flags));
priority += 3 * (rpl_dodag_info.curent_rank / rpl_dodag_info.dag_min_hop_rank_inc - 1);
return priority;
#else
return 255;
#endif
}
uint8_t protocol_6lowpan_beacon_join_priority_tx(int8_t interface_id)
{
protocol_interface_info_entry_t *cur = protocol_stack_interface_info_get_by_id(interface_id);
if (!cur) {
return 255;
}
int16_t priority = 0;
#ifdef HAVE_RPL
if (cur->rpl_domain) {
priority = protocol_6lowpan_rpl_global_priority_get();
}
#endif
#ifndef NO_MLE
mle_6lowpan_data_t *mle_6lowpan_data = protocol_6lowpan_mle_data_get();
if (mle_6lowpan_data && mle_6lowpan_data->nbr_of_neigh_max != 0) {
uint16_t mle_neigh_cnt = mle_class_active_neigh_counter(cur);
if (mle_neigh_cnt > mle_6lowpan_data->nbr_of_neigh_lower_threshold) {
uint16_t mle_neigh_limit;
mle_neigh_cnt -= mle_6lowpan_data->nbr_of_neigh_lower_threshold;
mle_neigh_limit = 32 * mle_neigh_cnt / (mle_6lowpan_data->nbr_of_neigh_max - mle_6lowpan_data->nbr_of_neigh_lower_threshold);
priority += mle_neigh_limit;
}
}
#endif
if (priority < 0) {
priority = 0;
} else if (priority > 255) {
priority = 255;
}
return priority;
}
uint8_t protocol_6lowpan_beacon_compare_rx(int8_t interface_id, uint8_t join_priority, uint8_t link_quality)
{
(void)interface_id; // not used, perhaps should be removed completely
uint16_t conn_to_pref;
conn_to_pref = ((256 - join_priority) * (uint16_t) link_quality) >> 8;
return conn_to_pref;
}
bool protocol_6lowpan_latency_estimate_get(int8_t interface_id, uint32_t *latency)
{
protocol_interface_info_entry_t *cur_interface = protocol_stack_interface_info_get_by_id(interface_id);
uint32_t latency_estimate = 0;
if (!cur_interface) {
return false;
}
if (cur_interface->eth_mac_api) {
// either PPP or Ethernet interface.
latency_estimate = 1000;
} else if (thread_info(cur_interface)) {
// thread network
latency_estimate = 5000;
} else if (ws_info(cur_interface)) {
latency_estimate = ws_common_latency_estimate_get(cur_interface);
} else {
// 6LoWPAN ND
latency_estimate = 20000;
}
if (latency_estimate != 0) {
*latency = latency_estimate;
return true;
}
return false;
}
bool protocol_6lowpan_stagger_estimate_get(int8_t interface_id, uint32_t data_amount, uint16_t *stagger_min, uint16_t *stagger_max, uint16_t *stagger_rand)
{
size_t network_size;
uint32_t datarate;
uint32_t stagger_value;
protocol_interface_info_entry_t *cur_interface = protocol_stack_interface_info_get_by_id(interface_id);
if (!cur_interface) {
return false;
}
if (cur_interface->eth_mac_api) {
// either PPP or Ethernet interface.
network_size = 1;
datarate = 1000000;
} else if (thread_info(cur_interface)) {
// thread network
network_size = 23;
datarate = 250000;
} else if (ws_info(cur_interface)) {
network_size = ws_common_network_size_estimate_get(cur_interface);
datarate = ws_common_usable_application_datarate_get(cur_interface);
} else {
// 6LoWPAN ND
network_size = 1000;
datarate = 250000;
}
if (data_amount == 0) {
// If no data amount given, use 1kB
data_amount = 1;
}
if (datarate < 25000) {
// Minimum data rate used in calculations is 25kbs to prevent invalid values
datarate = 25000;
}
/*
* Do not occupy whole bandwidth, leave space for network formation etc...
*/
if (ws_info(cur_interface) &&
(ws_common_connected_time_get(cur_interface) > STAGGER_STABLE_NETWORK_TIME || ws_common_authentication_time_get(cur_interface) == 0)) {
// After four hours of network connected full bandwidth is given to application
// Authentication has not been required during bootstrap so network load is much smaller
} else {
// Smaller data rate allowed as we have just joined to the network and Authentication was made
datarate = STAGGER_DATARATE_FOR_APPL(datarate);
}
// For small networks sets 10 seconds stagger
if (ws_info(cur_interface) && (network_size <= 100 || ws_test_proc_auto_trg(cur_interface))) {
stagger_value = 10;
} else {
stagger_value = 1 + ((data_amount * 1024 * 8 * network_size) / datarate);
}
/**
* Example:
* Maximum stagger value to send 1kB to 100 device network using data rate of 50kbs:
* 1 + (1 * 1024 * 8 * 100) / (50000*0.25) = 66s
*/
*stagger_min = stagger_value / 5; // Minimum stagger value is 1/5 of the max
if (stagger_value > 0xFFFF) {
*stagger_max = 0xFFFF;
} else {
*stagger_max = (uint16_t)stagger_value + *stagger_min;
}
// Randomize stagger value
*stagger_rand = randLIB_get_random_in_range(*stagger_min, *stagger_max);
return true;
}
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