mirror of https://github.com/ARMmbed/mbed-os.git
547 lines
19 KiB
C
547 lines
19 KiB
C
/*
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* Copyright (c) 2014-2021, Pelion and affiliates.
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* \file dhcpv6_server_api.c
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* \brief Add short description about this file!!!
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*
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*/
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#include "nsconfig.h"
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#include <string.h>
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#include <ns_types.h>
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#include <nsdynmemLIB.h>
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#include "libDHCPv6/libDHCPv6_server.h"
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#include "libDHCPv6/libDHCPv6.h"
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#include "common_functions.h"
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#include "ns_trace.h"
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#ifdef HAVE_DHCPV6_SERVER
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#define TRACE_GROUP "dhcp"
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static NS_LARGE NS_LIST_DEFINE(dhcpv6_gua_server_list, dhcpv6_gua_server_entry_s, link);
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bool libdhcpv6_gua_server_list_empty(void)
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{
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return ns_list_is_empty(&dhcpv6_gua_server_list);
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}
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static dhcpv6_gua_server_entry_s *libdhcpv6_server_entry_allocate(void)
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{
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dhcpv6_gua_server_entry_s *entry = ns_dyn_mem_alloc(sizeof(dhcpv6_gua_server_entry_s));
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uint8_t *server_duid_ptr = ns_dyn_mem_alloc(16);// Allocate 128-bit DUID-UUID by default it cover DUID-LL and DUID-LLTP also
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if (!entry || !server_duid_ptr) {
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ns_dyn_mem_free(entry);
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ns_dyn_mem_free(server_duid_ptr);
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return NULL;
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}
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entry->serverDynamic_DUID = server_duid_ptr;
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entry->serverDynamic_DUID_length = 16;
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entry->firstUnusedId = DHCP_ADDRESS_ID_START;
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entry->anonymousAddress = false;
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entry->disableAddressList = false;
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entry->maxSupportedClients = 200;
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entry->validLifetime = 7200;
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entry->removeCb = NULL;
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entry->addCb = NULL;
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ns_list_init(&entry->allocatedAddressList);
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ns_list_init(&entry->dnsServerList);
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ns_list_init(&entry->vendorDataList);
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return entry;
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}
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static uint16_t libdhcpv6_get_unique_id(dhcpv6_gua_server_entry_s *serverInfo)
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{
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uint8_t suggested_id = serverInfo->firstUnusedId;
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do {
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ns_list_foreach(dhcpv6_allocated_address_entry_t, cur, &serverInfo->allocatedAddressList) {
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if (serverInfo->firstUnusedId == cur->allocatedID) {
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serverInfo->firstUnusedId++;
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if (serverInfo->firstUnusedId == 0) {
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serverInfo->firstUnusedId++;
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}
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//Start from beginning
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break;
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}
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}
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} while (suggested_id != serverInfo->firstUnusedId);
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//return the first free and increase the value for the next time.
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serverInfo->firstUnusedId = suggested_id + 1;
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return suggested_id;
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}
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static uint16_t libdhcpv6_address_id_allocate(dhcpv6_gua_server_entry_s *serverInfo)
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{
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// Unique IDs start to generate from 1 and continue to go up every new address
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// if we go around 65535 we start from 1 and search for free id
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return libdhcpv6_get_unique_id(serverInfo);
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}
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static void libdhcpv6_gen_suffics_from_eui48(uint8_t *ptr, uint8_t *eui48)
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{
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*ptr++ = *eui48++ ^ 2;
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*ptr++ = *eui48++;
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*ptr++ = *eui48++;
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*ptr++ = 0xff;
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*ptr++ = 0xfe;
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*ptr++ = *eui48++;
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*ptr++ = *eui48++;
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*ptr = *eui48++;
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}
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static void libdhcpv6_gen_suffics_from_allocated_id(uint8_t *ptr, uint8_t *server_unique_48_bit_id, uint16_t allocated_id)
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{
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memcpy(ptr, server_unique_48_bit_id, 6);
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common_write_16_bit(allocated_id, ptr + 6);
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}
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static void libdhcpv6_address_list_entry_free(dhcpv6_gua_server_entry_s *server_info, dhcpv6_allocated_address_entry_t *entry)
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{
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ns_list_remove(&server_info->allocatedAddressList, entry);
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ns_dyn_mem_free(entry);
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}
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void libdhcpv6_gua_servers_time_update(uint32_t timeUpdateInSeconds)
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{
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//Check All allocated server inside this loop
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ns_list_foreach(dhcpv6_gua_server_entry_s, cur, &dhcpv6_gua_server_list) {
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//Check All allocated address in this module
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ns_list_foreach_safe(dhcpv6_allocated_address_entry_t, address, &cur->allocatedAddressList) {
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//Update
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if (address->preferredLifetime) {
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if (address->preferredLifetime <= timeUpdateInSeconds) {
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//Stop use this address for leasequery and delete Route or address map
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address->preferredLifetime = 0;
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if (cur->removeCb) {
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uint8_t ipAddress[16];
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libdhcpv6_allocated_address_write(ipAddress, address, cur);
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cur->removeCb(cur->interfaceId, ipAddress, cur->guaPrefix);
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}
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} else {
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address->preferredLifetime -= timeUpdateInSeconds;
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}
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}
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if (address->lifetime <= timeUpdateInSeconds) {
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libdhcpv6_address_list_entry_free(cur, address);
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} else {
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address->lifetime -= timeUpdateInSeconds;
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}
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}
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}
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}
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dhcpv6_gua_server_entry_s *libdhcpv6_server_data_get_by_prefix_and_interfaceid(int8_t interfaceId, const uint8_t *prefixPtr)
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{
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ns_list_foreach(dhcpv6_gua_server_entry_s, cur, &dhcpv6_gua_server_list) {
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if (cur->interfaceId == interfaceId) {
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if (memcmp(cur->guaPrefix, prefixPtr, 8) == 0) {
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return cur;
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}
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}
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}
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return NULL;
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}
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dhcpv6_gua_server_entry_s *libdhcpv6_server_data_get_by_prefix_and_socketinstance(uint16_t socketInstance, uint8_t *prefixPtr)
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{
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ns_list_foreach(dhcpv6_gua_server_entry_s, cur, &dhcpv6_gua_server_list) {
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if (cur->socketInstance_id == socketInstance) {
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if (!prefixPtr || memcmp(cur->guaPrefix, prefixPtr, 8) == 0) {
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return cur;
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}
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}
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}
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return NULL;
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}
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int libdhcpv6_server_duid_set(dhcpv6_gua_server_entry_s *server_info, uint8_t *duid_ptr, uint16_t duid_type, uint8_t duid_length)
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{
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//Allocate dynamically new Server DUID if needed
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if (duid_length > server_info->serverDynamic_DUID_length) {
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//Allocate dynamic new bigger
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uint8_t *new_ptr = ns_dyn_mem_alloc(duid_length);
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if (!new_ptr) {
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return -1;
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}
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server_info->serverDynamic_DUID_length = duid_length;
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ns_dyn_mem_free(server_info->serverDynamic_DUID);
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server_info->serverDynamic_DUID = new_ptr;
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}
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//SET DUID
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server_info->serverDUID.duid = server_info->serverDynamic_DUID;
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memcpy(server_info->serverDUID.duid, duid_ptr, duid_length);
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server_info->serverDUID.duid_length = duid_length;
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server_info->serverDUID.type = duid_type;
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return 0;
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}
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dhcpv6_gua_server_entry_s *libdhcpv6_gua_server_allocate(uint8_t *prefix, int8_t interfaceId, uint8_t *serverDUID, uint16_t serverDUIDType)
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{
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dhcpv6_gua_server_entry_s *entry = libdhcpv6_server_data_get_by_prefix_and_interfaceid(interfaceId, prefix);
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if (entry == NULL) {
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entry = libdhcpv6_server_entry_allocate();
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if (!entry) {
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return NULL;
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}
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//Generate Server DUID-LL by default
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uint8_t *ptr;
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uint8_t duid_ll[16];
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uint8_t duid_length;
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ptr = duid_ll;
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duid_length = libdhcpv6_duid_linktype_size(serverDUIDType) + 2;
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ptr = common_write_16_bit(serverDUIDType, ptr);
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memcpy(ptr, serverDUID, libdhcpv6_duid_linktype_size(serverDUIDType));
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//SET Defaultsuffics
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if (libdhcpv6_duid_linktype_size(serverDUIDType) == 8) {
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memcpy(entry->clientIdDefaultSuffics, serverDUID, 3);
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memcpy(entry->clientIdDefaultSuffics + 3, serverDUID + 5, 3);
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} else {
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memcpy(entry->clientIdDefaultSuffics, serverDUID, 6);
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}
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entry->clientIdDefaultSuffics[0] ^= 0x02;
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//SET DUID
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if (libdhcpv6_server_duid_set(entry, duid_ll, DHCPV6_DUID_LINK_LAYER_TYPE, duid_length) != 0) {
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ns_dyn_mem_free(entry->serverDynamic_DUID);
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ns_dyn_mem_free(entry);
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return NULL;
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}
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memcpy(entry->guaPrefix, prefix, 8);
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entry->interfaceId = interfaceId;
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ns_list_add_to_end(&dhcpv6_gua_server_list, entry);
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}
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return entry;
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}
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void libdhcpv6_gua_server_free_by_prefix_and_interfaceid(uint8_t *prefix, int8_t interfaceId)
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{
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dhcpv6_gua_server_entry_s *serverInfo = libdhcpv6_server_data_get_by_prefix_and_interfaceid(interfaceId, prefix);
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if (serverInfo) {
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if ((serverInfo->interfaceId == interfaceId) && (memcmp(serverInfo->guaPrefix, prefix, 8) == 0)) {
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ns_list_foreach_safe(dhcpv6_allocated_address_entry_t, cur, &serverInfo->allocatedAddressList) {
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libdhcpv6_address_list_entry_free(serverInfo, cur);
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}
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ns_list_foreach_safe(dhcpv6_dns_server_data_t, cur, &serverInfo->dnsServerList) {
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//DNS Server Info Remove
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ns_list_remove(&serverInfo->dnsServerList, cur);
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ns_dyn_mem_free(cur->search_list);
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ns_dyn_mem_free(cur);
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}
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ns_list_foreach_safe(dhcpv6_vendor_data_t, cur, &serverInfo->vendorDataList) {
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ns_list_remove(&serverInfo->vendorDataList, cur);
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ns_dyn_mem_free(cur->vendor_data);
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ns_dyn_mem_free(cur);
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}
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ns_list_remove(&dhcpv6_gua_server_list, serverInfo);
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ns_dyn_mem_free(serverInfo->serverDynamic_DUID);
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ns_dyn_mem_free(serverInfo);
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}
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}
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}
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static void libdhcpv6_address_entry_lifetime_set(dhcpv6_allocated_address_entry_t *entry, uint32_t validLifetime)
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{
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if (validLifetime != 0xffffffff) {
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entry->lifetime = validLifetime;
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entry->preferredLifetime = (validLifetime >> 1);
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} else {
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entry->lifetime = 0xffffffff;
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entry->preferredLifetime = 0xffffffff;
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}
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}
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void libdhcpv6_allocated_address_write(uint8_t *ptr, dhcpv6_allocated_address_entry_t *address, dhcpv6_gua_server_entry_s *serverInfo)
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{
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memcpy(ptr, serverInfo->guaPrefix, 8);
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ptr += 8;
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if (serverInfo->anonymousAddress) {
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//Generate from 16-bit allocate and default suffic's
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libdhcpv6_gen_suffics_from_allocated_id(ptr, serverInfo->clientIdDefaultSuffics, address->allocatedID);
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return;
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}
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//Generate address from link layer address
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if (address->linkType == DHCPV6_DUID_HARDWARE_EUI64_TYPE ||
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address->linkType == DHCPV6_DUID_HARDWARE_IEEE_802_NETWORKS_TYPE) {
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memcpy(ptr, address->linkId, 8);
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*ptr ^= 2;
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return;
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} else if (address->linkType == DHCPV6_DUID_HARDWARE_EUI48_TYPE) {
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libdhcpv6_gen_suffics_from_eui48(ptr, address->linkId);
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return;
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}
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}
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static void libdhcpv6_generate_address_entry(dhcpv6_allocated_address_t *address, dhcpv6_allocated_address_entry_t *cur, dhcpv6_gua_server_entry_s *serverInfo)
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{
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libdhcpv6_allocated_address_write(address->nonTemporalAddress, cur, serverInfo);
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memcpy(address->linkId, cur->linkId, 8);
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address->T0 = cur->T0;
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address->T1 = cur->T1;
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address->iaID = cur->iaID;
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address->lifetime = cur->lifetime;
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address->preferredLifetime = cur->preferredLifetime;
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address->linkType = cur->linkType;
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}
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static void libdhcpv6_address_list_entry_add_to_list(dhcpv6_gua_server_entry_s *serverInfo, dhcpv6_allocated_address_entry_t *allocated)
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{
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if (allocated->allocatedID != 0) {
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// If we have allocated ID we sort by it if it is 0 we dont do any sorting
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ns_list_foreach_safe(dhcpv6_allocated_address_entry_t, cur, &serverInfo->allocatedAddressList) {
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if (cur->allocatedID > allocated->allocatedID) {
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//Add before new allocated
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ns_list_add_before(&serverInfo->allocatedAddressList, cur, allocated);
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return;
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}
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}
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}
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ns_list_add_to_end(&serverInfo->allocatedAddressList, allocated);
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}
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void libdhcpv6_address_delete(dhcpv6_gua_server_entry_s *serverInfo, const uint8_t *address)
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{
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uint8_t device_address[16];
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if (memcmp(serverInfo->guaPrefix, address, 8)) {
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return;
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}
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ns_list_foreach_safe(dhcpv6_allocated_address_entry_t, cur, &serverInfo->allocatedAddressList) {
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libdhcpv6_allocated_address_write(device_address, cur, serverInfo);
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if (memcmp(address, device_address, 16) == 0) {
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libdhcpv6_address_list_entry_free(serverInfo, cur);
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return;
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}
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}
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}
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static dhcpv6_allocated_address_entry_t *libdhcpv6_address_list_entry_create(dhcpv6_gua_server_entry_s *serverInfo, dhcpv6_allocated_address_entry_t *source)
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{
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dhcpv6_allocated_address_entry_t *entry;
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entry = ns_dyn_mem_alloc(sizeof(dhcpv6_allocated_address_entry_t));
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if (!entry) {
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return NULL;
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}
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*entry = *source;
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libdhcpv6_address_list_entry_add_to_list(serverInfo, entry);
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return entry;
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}
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dhcpv6_allocated_address_t *libdhcpv6_address_allocate(dhcpv6_gua_server_entry_s *serverInfo, uint8_t *linkId, uint16_t linkType, uint32_t iaID, uint32_t T0, uint32_t T1, bool allocateNew)
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{
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dhcpv6_allocated_address_entry_t newEntry;
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uint16_t duiLength = 6;
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if (linkType == DHCPV6_DUID_HARDWARE_EUI64_TYPE ||
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linkType == DHCPV6_DUID_HARDWARE_IEEE_802_NETWORKS_TYPE) {
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duiLength = 8;
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}
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// Search if we have old address in list
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ns_list_foreach(dhcpv6_allocated_address_entry_t, cur, &serverInfo->allocatedAddressList) {
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if (cur->linkType == linkType && memcmp(cur->linkId, linkId, duiLength) == 0) {
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cur->iaID = iaID;
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cur->T0 = T0;
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cur->T1 = T1;
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libdhcpv6_address_entry_lifetime_set(cur, serverInfo->validLifetime);
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libdhcpv6_generate_address_entry(&serverInfo->tempAddressEntry, cur, serverInfo);
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return &serverInfo->tempAddressEntry;
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}
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}
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if (!allocateNew) {
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return NULL;
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}
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if (ns_list_count(&serverInfo->allocatedAddressList) >= serverInfo->maxSupportedClients) {
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// Maximum supported clients reached
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return NULL;
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}
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// Generate new address
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memcpy(newEntry.linkId, linkId, duiLength);
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newEntry.linkType = linkType;
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newEntry.iaID = iaID;
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newEntry.T0 = T0;
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newEntry.T1 = T1;
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newEntry.allocatedID = 0;
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libdhcpv6_address_entry_lifetime_set(&newEntry, serverInfo->validLifetime);
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if (serverInfo->anonymousAddress) {
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// Generate anonymous address id
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newEntry.allocatedID = libdhcpv6_address_id_allocate(serverInfo);
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}
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if (!serverInfo->disableAddressList) {
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// Create new List item and add to list
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libdhcpv6_address_list_entry_create(serverInfo, &newEntry);
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}
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libdhcpv6_generate_address_entry(&serverInfo->tempAddressEntry, &newEntry, serverInfo);
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return &serverInfo->tempAddressEntry;
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}
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dhcpv6_dns_server_data_t *libdhcpv6_dns_server_discover(dhcpv6_gua_server_entry_s *serverInfo, const uint8_t *address)
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{
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ns_list_foreach(dhcpv6_dns_server_data_t, cur, &serverInfo->dnsServerList) {
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if (memcmp(cur->server_address, address, 16) == 0) {
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return cur;
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}
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}
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return NULL;
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}
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dhcpv6_dns_server_data_t *libdhcpv6_dns_server_allocate(dhcpv6_gua_server_entry_s *serverInfo, const uint8_t *address)
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{
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dhcpv6_dns_server_data_t *entry = libdhcpv6_dns_server_discover(serverInfo, address);
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if (entry) {
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return entry;
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}
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entry = ns_dyn_mem_alloc(sizeof(dhcpv6_dns_server_data_t));
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if (!entry) {
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return NULL;
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}
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ns_list_add_to_end(&serverInfo->dnsServerList, entry);
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memcpy(entry->server_address, address, 16);
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entry->search_list = NULL;
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entry->search_list_length = 0;
|
|
return entry;
|
|
}
|
|
|
|
dhcpv6_vendor_data_t *libdhcpv6_vendor_data_discover(dhcpv6_gua_server_entry_s *serverInfo, uint32_t enterprise_number)
|
|
{
|
|
ns_list_foreach(dhcpv6_vendor_data_t, cur, &serverInfo->vendorDataList) {
|
|
if (cur->enterprise_number == enterprise_number) {
|
|
return cur;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
dhcpv6_vendor_data_t *libdhcpv6_vendor_data_allocate(dhcpv6_gua_server_entry_s *serverInfo, uint32_t enterprise_number)
|
|
{
|
|
dhcpv6_vendor_data_t *entry = libdhcpv6_vendor_data_discover(serverInfo, enterprise_number);
|
|
|
|
if (entry) {
|
|
return entry;
|
|
}
|
|
|
|
entry = ns_dyn_mem_alloc(sizeof(dhcpv6_vendor_data_t));
|
|
if (!entry) {
|
|
return NULL;
|
|
}
|
|
ns_list_add_to_end(&serverInfo->vendorDataList, entry);
|
|
entry->enterprise_number = enterprise_number;
|
|
entry->vendor_data_cb = NULL;
|
|
entry->vendor_data = NULL;
|
|
entry->vendor_data_length = 0;
|
|
return entry;
|
|
}
|
|
|
|
uint16_t libdhcpv6_dns_server_message_sizes(dhcpv6_gua_server_entry_s *serverInfo)
|
|
{
|
|
uint16_t message_size = 0;
|
|
ns_list_foreach(dhcpv6_dns_server_data_t, cur, &serverInfo->dnsServerList) {
|
|
message_size += 4 + 16; //Type Length + address //
|
|
//Search List part
|
|
message_size += 4 + cur->search_list_length; //Type Length + search_list_length
|
|
}
|
|
return message_size;
|
|
}
|
|
|
|
uint16_t libdhcpv6_vendor_data_message_sizes(dhcpv6_gua_server_entry_s *serverInfo)
|
|
{
|
|
uint16_t message_size = 0;
|
|
ns_list_foreach(dhcpv6_vendor_data_t, cur, &serverInfo->vendorDataList) {
|
|
uint16_t size = cur->vendor_data_length; //Type + Length + enterprise + vendor_data_length
|
|
if (cur->vendor_data_cb) {
|
|
cur->vendor_data_cb(serverInfo->interfaceId, NULL, &size);
|
|
}
|
|
if (size != 0) {
|
|
message_size += 2 + 2 + 4 + size;
|
|
}
|
|
}
|
|
return message_size;
|
|
}
|
|
|
|
uint8_t *libdhcpv6_dns_server_message_writes(dhcpv6_gua_server_entry_s *serverInfo, uint8_t *ptr)
|
|
{
|
|
ns_list_foreach(dhcpv6_dns_server_data_t, cur, &serverInfo->dnsServerList) {
|
|
//Write first DNS Server info
|
|
ptr = common_write_16_bit(DHCPV6_OPTION_DNS_SERVERS, ptr);
|
|
ptr = common_write_16_bit(16, ptr); //Length
|
|
memcpy(ptr, cur->server_address, 16);
|
|
ptr += 16;
|
|
|
|
ptr = common_write_16_bit(DHCPV6_OPTION_DOMAIN_LIST, ptr);
|
|
ptr = common_write_16_bit(cur->search_list_length, ptr); //Length
|
|
if (cur->search_list_length) {
|
|
memcpy(ptr, cur->search_list, cur->search_list_length);
|
|
ptr += cur->search_list_length;
|
|
}
|
|
}
|
|
return ptr;
|
|
}
|
|
|
|
uint8_t *libdhcpv6_vendor_data_message_writes(dhcpv6_gua_server_entry_s *serverInfo, uint8_t *ptr)
|
|
{
|
|
ns_list_foreach(dhcpv6_vendor_data_t, cur, &serverInfo->vendorDataList) {
|
|
|
|
uint16_t length = cur->vendor_data_length;
|
|
|
|
if (cur->vendor_data_cb) {
|
|
cur->vendor_data_cb(serverInfo->interfaceId, NULL, &length);
|
|
}
|
|
if (length == 0) {
|
|
// No vendor data
|
|
continue;
|
|
}
|
|
length += 4;
|
|
|
|
ptr = common_write_16_bit(DHCPV6_OPTION_VENDOR_SPECIFIC_INFO, ptr);
|
|
ptr = common_write_16_bit(length, ptr); //Length
|
|
ptr = common_write_32_bit(cur->enterprise_number, ptr);
|
|
if (cur->vendor_data_length) {
|
|
memcpy(ptr, cur->vendor_data, cur->vendor_data_length);
|
|
ptr += cur->vendor_data_length;
|
|
}
|
|
if (cur->vendor_data_cb) {
|
|
ptr = cur->vendor_data_cb(serverInfo->interfaceId, ptr, NULL);
|
|
}
|
|
}
|
|
return ptr;
|
|
}
|
|
|
|
|
|
#endif
|
|
|