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mbed-os/connectivity/nanostack/sal-stack-nanostack/source/Security/kmp/kmp_socket_if.c

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/*
* Copyright (c) 2016-2019, 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 "nsconfig.h"
#include <string.h>
#include "ns_types.h"
#include "ns_list.h"
#include "ns_trace.h"
#include "ns_address.h"
#include "nsdynmemLIB.h"
#include "eventOS_event.h"
#include "eventOS_scheduler.h"
#include "eventOS_event_timer.h"
#include "NWK_INTERFACE/Include/protocol.h"
#include "Common_Protocols/ipv6_constants.h"
#include "socket_api.h"
#include "6LoWPAN/ws/ws_config.h"
#include "Security/protocols/sec_prot_cfg.h"
#include "Security/kmp/kmp_addr.h"
#include "Security/kmp/kmp_api.h"
#include "Security/kmp/kmp_socket_if.h"
#include "common_functions.h"
#ifdef HAVE_WS
#define TRACE_GROUP "kmsi"
#define SOCKET_IF_HEADER_SIZE 27
#define INSTANCE_SOCKETS_NUMBER 3
typedef struct {
kmp_service_t *kmp_service; /**< KMP service */
uint8_t instance_id; /**< Instance identifier */
bool relay; /**< Interface is relay interface */
ns_address_t remote_addr; /**< Remote address */
int8_t socket_id[INSTANCE_SOCKETS_NUMBER]; /**< Socket ID */
unsigned socket_id_in_use : 4; /**< Socket ID is in use */
ns_list_link_t link; /**< Link */
} kmp_socket_if_t;
static int8_t kmp_socket_if_send(kmp_service_t *service, uint8_t instance_id, kmp_type_e kmp_id, const kmp_addr_t *addr, void *pdu, uint16_t size, uint8_t tx_identifier, uint8_t connection_num, uint8_t flags);
static void kmp_socket_if_socket_cb(void *ptr);
static NS_LIST_DEFINE(kmp_socket_if_list, kmp_socket_if_t, link);
static uint8_t kmp_socket_if_instance_id = 1;
int8_t kmp_socket_if_register(kmp_service_t *service, uint8_t *instance_id, bool relay, uint16_t local_port, const uint8_t *remote_addr, uint16_t remote_port)
{
if (!service || !remote_addr) {
return -1;
}
kmp_socket_if_t *socket_if = NULL;
bool new_socket_if_allocated = false;
ns_list_foreach(kmp_socket_if_t, entry, &kmp_socket_if_list) {
if (entry->kmp_service == service && entry->instance_id == *instance_id) {
socket_if = entry;
}
}
if (!socket_if) {
socket_if = ns_dyn_mem_alloc(sizeof(kmp_socket_if_t));
if (!socket_if) {
return -1;
}
memset(socket_if, 0, sizeof(kmp_socket_if_t));
for (uint8_t socket_num = 0; socket_num < INSTANCE_SOCKETS_NUMBER; socket_num++) {
socket_if->socket_id[socket_num] = -1;
}
socket_if->socket_id_in_use = 1;
new_socket_if_allocated = true;
}
socket_if->kmp_service = service;
if (*instance_id == 0) {
socket_if->instance_id = kmp_socket_if_instance_id++;
if (socket_if->instance_id == 0) {
socket_if->instance_id = kmp_socket_if_instance_id++;
}
*instance_id = socket_if->instance_id;
}
socket_if->relay = relay;
socket_if->remote_addr.type = ADDRESS_IPV6;
bool address_changed = false;
if (memcmp(&socket_if->remote_addr.address, remote_addr, 16) != 0 ||
socket_if->remote_addr.identifier != remote_port) {
address_changed = true;
}
memcpy(&socket_if->remote_addr.address, remote_addr, 16);
socket_if->remote_addr.identifier = remote_port;
for (uint8_t socket_num = 0; socket_num < INSTANCE_SOCKETS_NUMBER; socket_num++) {
if (socket_if->socket_id_in_use & (1 << socket_num)) {
if ((socket_if->socket_id[socket_num] < 1) || address_changed) {
if (socket_if->socket_id[socket_num] >= 0) {
socket_close(socket_if->socket_id[socket_num]);
}
socket_if->socket_id[socket_num] = socket_open(IPV6_NH_UDP, local_port, &kmp_socket_if_socket_cb);
if (socket_if->socket_id[socket_num] < 0) {
ns_dyn_mem_free(socket_if);
return -1;
}
}
}
}
uint8_t header_size = 0;
if (relay) {
header_size = SOCKET_IF_HEADER_SIZE;
}
if (kmp_service_msg_if_register(service, *instance_id, kmp_socket_if_send, header_size, INSTANCE_SOCKETS_NUMBER) < 0) {
for (uint8_t socket_num = 0; socket_num < INSTANCE_SOCKETS_NUMBER; socket_num++) {
if (socket_if->socket_id[socket_num] >= 0) {
socket_close(socket_if->socket_id[socket_num]);
}
}
ns_dyn_mem_free(socket_if);
return -1;
}
if (new_socket_if_allocated) {
ns_list_add_to_end(&kmp_socket_if_list, socket_if);
}
return 0;
}
int8_t kmp_socket_if_unregister(kmp_service_t *service)
{
if (!service) {
return -1;
}
ns_list_foreach_safe(kmp_socket_if_t, entry, &kmp_socket_if_list) {
if (entry->kmp_service == service) {
ns_list_remove(&kmp_socket_if_list, entry);
for (uint8_t socket_num = 0; socket_num < INSTANCE_SOCKETS_NUMBER; socket_num++) {
if (entry->socket_id[socket_num] >= 0) {
socket_close(entry->socket_id[socket_num]);
}
}
kmp_service_msg_if_register(service, entry->instance_id, NULL, 0, 0);
ns_dyn_mem_free(entry);
}
}
return 0;
}
static int8_t kmp_socket_if_send(kmp_service_t *service, uint8_t instance_id, kmp_type_e kmp_id, const kmp_addr_t *addr, void *pdu, uint16_t size, uint8_t tx_identifier, uint8_t connection_num, uint8_t flags)
{
(void) tx_identifier;
if (!service || !pdu || !addr) {
return -1;
}
if (connection_num >= INSTANCE_SOCKETS_NUMBER) {
return -1;
}
kmp_socket_if_t *socket_if = NULL;
ns_list_foreach(kmp_socket_if_t, entry, &kmp_socket_if_list) {
if (entry->kmp_service == service && entry->instance_id == instance_id) {
socket_if = entry;
break;
}
}
if (!socket_if) {
return -1;
}
if (socket_if->relay) {
//Build UPD Relay
uint8_t *ptr = pdu;
memcpy(ptr, addr->relay_address, 16);
ptr += 16;
ptr = common_write_16_bit(addr->port, ptr);
memcpy(ptr, kmp_address_eui_64_get(addr), 8);
ptr += 8;
*ptr = kmp_id;
}
int8_t socket_id = -1;
if ((socket_if->socket_id_in_use & (1 << connection_num)) && socket_if->socket_id[connection_num] >= 0) {
socket_id = socket_if->socket_id[connection_num];
} else {
if (socket_if->socket_id[connection_num] < 0) {
socket_if->socket_id[connection_num] = socket_open(IPV6_NH_UDP, 0, &kmp_socket_if_socket_cb);
}
if (socket_if->socket_id[connection_num] < 0) {
return -1;
}
socket_if->socket_id_in_use |= (1 << connection_num);
}
socket_sendto(socket_id, &socket_if->remote_addr, pdu, size);
// Deallocate unless flags deny it
if (flags & MSG_IF_SEND_FLAG_NO_DEALLOC) {
return 0;
}
ns_dyn_mem_free(pdu);
return 0;
}
static void kmp_socket_if_socket_cb(void *ptr)
{
socket_callback_t *cb_data = ptr;
if (cb_data->event_type != SOCKET_DATA) {
return;
}
kmp_socket_if_t *socket_if = NULL;
uint8_t connection_num = 0;
ns_list_foreach(kmp_socket_if_t, entry, &kmp_socket_if_list) {
for (uint8_t socket_num = 0; socket_num < INSTANCE_SOCKETS_NUMBER; socket_num++) {
if (entry->socket_id[socket_num] == cb_data->socket_id) {
socket_if = entry;
connection_num = socket_num;
break;
}
}
}
if (!socket_if) {
return;
}
uint8_t *pdu = ns_dyn_mem_temporary_alloc(cb_data->d_len);
if (socket_recvfrom(cb_data->socket_id, pdu, cb_data->d_len, 0, 0) != cb_data->d_len) {
ns_dyn_mem_free(pdu);
return;
}
kmp_addr_t addr;
memset(&addr, 0, sizeof(kmp_addr_t));
kmp_type_e type = KMP_TYPE_NONE;
uint8_t *data_ptr = pdu;
if (socket_if->relay) {
addr.type = KMP_ADDR_EUI_64_AND_IP;
memcpy(addr.relay_address, data_ptr, 16);
data_ptr += 16;
addr.port = common_read_16_bit(data_ptr);
data_ptr += 2;
memcpy(addr.eui_64, data_ptr, 8);
data_ptr += 8;
type = kmp_api_type_from_id_get(*data_ptr++);
if (type == KMP_TYPE_NONE) {
ns_dyn_mem_free(pdu);
return;
}
cb_data->d_len -= SOCKET_IF_HEADER_SIZE;
}
kmp_service_msg_if_receive(socket_if->kmp_service, socket_if->instance_id, type, &addr, data_ptr, cb_data->d_len, connection_num);
ns_dyn_mem_free(pdu);
}
#endif /* HAVE_WS */
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