coap_service_api.c

00001 /*
00002  * Copyright (c) 2015-2017, Arm Limited and affiliates.
00003  * SPDX-License-Identifier: Apache-2.0
00004  *
00005  * Licensed under the Apache License, Version 2.0 (the "License");
00006  * you may not use this file except in compliance with the License.
00007  * You may obtain a copy of the License at
00008  *
00009  *     http://www.apache.org/licenses/LICENSE-2.0
00010  *
00011  * Unless required by applicable law or agreed to in writing, software
00012  * distributed under the License is distributed on an "AS IS" BASIS,
00013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00014  * See the License for the specific language governing permissions and
00015  * limitations under the License.
00016  */
00017 
00018 
00019 
00020 #include <string.h>
00021 
00022 #include "ns_types.h"
00023 #include "ns_list.h"
00024 #include "ns_trace.h"
00025 #include "nsdynmemLIB.h"
00026 #include "mbed-coap/sn_coap_header.h"
00027 #include "coap_service_api.h"
00028 #include "coap_message_handler.h"
00029 #include "eventOS_event.h"
00030 #include "eventOS_scheduler.h"
00031 #include "eventOS_event_timer.h"
00032 #include "common_functions.h"
00033 #include "coap_connection_handler.h"
00034 #include "net_interface.h"
00035 #include "coap_service_api_internal.h"
00036 #include "coap_message_handler.h"
00037 #include "mbed-coap/sn_coap_protocol.h"
00038 
00039 static int16_t coap_msg_process_callback(int8_t socket_id, sn_coap_hdr_s *coap_message, coap_transaction_t *transaction_ptr);
00040 
00041 typedef struct uri_registration {
00042     char *uri_ptr;
00043     uint16_t uri_len;
00044     uint8_t allowed_method;
00045     coap_service_request_recv_cb *request_recv_cb;
00046     ns_list_link_t link;
00047 } uri_registration_t;
00048 
00049 typedef NS_LIST_HEAD (uri_registration_t, link) uri_registration_list_t;
00050 
00051 typedef struct coap_service {
00052     coap_service_security_done_cb *coap_security_done_cb;
00053     coap_service_security_start_cb *security_start_cb;
00054     coap_service_virtual_socket_send_cb *virtual_socket_send_cb;
00055     uri_registration_list_t uri_list;
00056     coap_conn_handler_t *conn_handler;
00057     int8_t interface_id;
00058     int8_t service_id;
00059     int8_t listen_socket;
00060     uint8_t service_options;
00061     ns_list_link_t link;
00062 } coap_service_t;
00063 
00064 #define TRACE_GROUP "ThSA"
00065 
00066 static NS_LIST_DEFINE(instance_list, coap_service_t, link);
00067 static int8_t tasklet_id = -1;
00068 coap_msg_handler_t *coap_service_handle = NULL;
00069 static uint32_t coap_ticks = 1;
00070 
00071 #define COAP_TICK_TIMER 0xf1
00072 
00073 static uri_registration_t *uri_registration_find(coap_service_t *this, const void *uri_ptr, uint16_t uri_len)
00074 {
00075     ns_list_foreach(uri_registration_t, cur_ptr, &this->uri_list) {
00076         if (cur_ptr->uri_len == uri_len && memcmp(cur_ptr->uri_ptr, uri_ptr, uri_len) == 0) {
00077             return cur_ptr;
00078         }
00079     }
00080     return NULL;
00081 }
00082 static coap_service_t *service_find(int8_t service_id)
00083 {
00084     coap_service_t *this = NULL;
00085     ns_list_foreach(coap_service_t, cur_ptr, &instance_list) {
00086         if (cur_ptr->service_id == service_id) {
00087             this = cur_ptr;
00088             break;
00089         }
00090     }
00091     return this;
00092 }
00093 
00094 static coap_service_t *service_find_by_socket(int8_t socket_id)
00095 {
00096     coap_service_t *this = NULL;
00097     ns_list_foreach(coap_service_t, cur_ptr, &instance_list) {
00098         if( coap_connection_handler_socket_belongs_to(cur_ptr->conn_handler, socket_id) ){
00099             this = cur_ptr;
00100             break;
00101         }
00102     }
00103     return this;
00104 }
00105 
00106 static coap_service_t *service_find_by_uri(uint8_t socket_id, uint8_t *uri_ptr, uint16_t uri_len)
00107 {
00108     ns_list_foreach(coap_service_t, cur_ptr, &instance_list) {
00109         if (coap_connection_handler_socket_belongs_to(cur_ptr->conn_handler, socket_id) && uri_registration_find(cur_ptr, uri_ptr, uri_len)) {
00110             return cur_ptr;
00111         }
00112     }
00113     return NULL;
00114 }
00115 
00116 static bool coap_service_can_leave_multicast_group(coap_conn_handler_t *conn_handler)
00117 {
00118     int mc_count = 0;
00119     bool current_handler_joined_to_mc_group = false;
00120 
00121     ns_list_foreach(coap_service_t, cur_ptr, &instance_list) {
00122         if (cur_ptr->conn_handler && cur_ptr->conn_handler->registered_to_multicast) {
00123             if (conn_handler == cur_ptr->conn_handler) {
00124                 current_handler_joined_to_mc_group = true;
00125             }
00126             mc_count ++;
00127         }
00128     }
00129 
00130     if (mc_count == 1 && current_handler_joined_to_mc_group) {
00131         // current handler is the only one joined to multicast group
00132         return true;
00133     }
00134 
00135     return false;
00136 }
00137 
00138 /**
00139  *  Coap handling functions
00140  */
00141 static void *own_alloc(uint16_t size)
00142 {
00143     if (size) {
00144         return ns_dyn_mem_temporary_alloc(size);
00145     } else {
00146         return 0;
00147     }
00148 }
00149 
00150 static void own_free(void *ptr)
00151 {
00152     if (ptr) {
00153         ns_dyn_mem_free(ptr);
00154     }
00155 }
00156 
00157 static uint8_t coap_tx_function(uint8_t *data_ptr, uint16_t data_len, sn_nsdl_addr_s *address_ptr, void *param)
00158 {
00159     coap_service_t *this;
00160     coap_transaction_t *transaction_ptr = coap_message_handler_transaction_valid(param);
00161     ns_address_t dest_addr;
00162     int ret_val;
00163 
00164     if (!transaction_ptr || !data_ptr) {
00165         return 0;
00166     }
00167 
00168     tr_debug("Service %d, CoAP TX Function - mid: %d", transaction_ptr->service_id, common_read_16_bit(data_ptr + 2));
00169 
00170     this = service_find(transaction_ptr->service_id);
00171     if (!this) {
00172         return 0;
00173     }
00174 
00175     memcpy(&(dest_addr.address), address_ptr->addr_ptr, 16);
00176     dest_addr.identifier = address_ptr->port;
00177     dest_addr.type = ADDRESS_IPV6;
00178 
00179     ret_val = coap_connection_handler_send_data(this->conn_handler, &dest_addr, transaction_ptr->local_address,
00180             data_ptr, data_len, (this->service_options & COAP_SERVICE_OPTIONS_SECURE_BYPASS) == COAP_SERVICE_OPTIONS_SECURE_BYPASS);
00181     if (ret_val == 0) {
00182         if (!transaction_ptr->data_ptr) {
00183             transaction_ptr->data_ptr = ns_dyn_mem_alloc(data_len);
00184             if (!transaction_ptr->data_ptr) {
00185                 tr_debug("coap tx out of memory");
00186                 return 0;
00187             }
00188             memcpy(transaction_ptr->data_ptr, data_ptr, data_len);
00189             transaction_ptr->data_len = data_len;
00190         }
00191     } else if ((ret_val == -1) || (!transaction_ptr->resp_cb && transaction_ptr->req_msg_type == COAP_MSG_TYPE_NON_CONFIRMABLE)) {
00192         transaction_delete(transaction_ptr);
00193     }
00194 
00195     return 0;
00196 }
00197 
00198 static void service_event_handler(arm_event_s *event)
00199 {
00200     if (event->event_type == ARM_LIB_TASKLET_INIT_EVENT) {
00201         tr_debug("service tasklet initialised");
00202         /*initialize coap service and listen socket*/
00203     }
00204     if (event->event_type == ARM_LIB_SYSTEM_TIMER_EVENT && event->event_id == COAP_TICK_TIMER) {
00205         coap_message_handler_exec(coap_service_handle, coap_ticks++);
00206         if(coap_ticks && !coap_ticks % SECURE_SESSION_CLEAN_INTERVAL){
00207             coap_connection_handler_exec(coap_ticks);
00208         }
00209     }
00210     eventOS_event_timer_request((uint8_t)COAP_TICK_TIMER, ARM_LIB_SYSTEM_TIMER_EVENT, tasklet_id, 1000);
00211 }
00212 
00213 static int16_t coap_msg_process_callback(int8_t socket_id, sn_coap_hdr_s *coap_message, coap_transaction_t *transaction_ptr)
00214 {
00215     coap_service_t *this;
00216     if (!coap_message || !transaction_ptr) {
00217         return -1;
00218     }
00219 
00220     // Message is request, find correct handle
00221     this = service_find_by_uri(socket_id, coap_message->uri_path_ptr, coap_message->uri_path_len);
00222     if (!this) {
00223         tr_debug("not registered uri %.*s", coap_message->uri_path_len, coap_message->uri_path_ptr);
00224         if (coap_message->msg_type == COAP_MSG_TYPE_CONFIRMABLE) {
00225             coap_message_handler_response_send(coap_service_handle, transaction_ptr->service_id, COAP_SERVICE_OPTIONS_NONE, coap_message,
00226                 COAP_MSG_CODE_RESPONSE_NOT_FOUND, COAP_CT_NONE, NULL, 0);
00227             return 0;
00228         }
00229         return -1;
00230     }
00231 
00232     uri_registration_t *uri_reg_ptr = uri_registration_find(this, coap_message->uri_path_ptr, coap_message->uri_path_len);
00233     if (uri_reg_ptr && uri_reg_ptr->request_recv_cb) {
00234         tr_debug("Service %d, call request recv cb uri %.*s", this->service_id, coap_message->uri_path_len, coap_message->uri_path_ptr);
00235 
00236         if ((this->service_options & COAP_SERVICE_OPTIONS_SECURE_BYPASS) == COAP_SERVICE_OPTIONS_SECURE_BYPASS ) {//TODO Add secure bypass option
00237             // Service has secure bypass active TODO this is not defined in interface
00238             // this check can be removed I think
00239             transaction_ptr->options = COAP_REQUEST_OPTIONS_SECURE_BYPASS;
00240         }
00241         transaction_ptr->service_id = this->service_id;
00242         return uri_reg_ptr->request_recv_cb(this->service_id, transaction_ptr->remote_address, transaction_ptr->remote_port, coap_message);
00243     }
00244     return -1;
00245 }
00246 
00247 static int recv_cb(int8_t socket_id, uint8_t src_address[static 16], uint16_t port, const uint8_t dst_address[static 16], unsigned char *data, int len)
00248 {
00249     uint8_t *data_ptr = NULL;
00250     uint16_t data_len = 0;
00251 
00252     if (!data || !len) {
00253         return -1;
00254     }
00255 
00256     data_ptr = own_alloc(len);
00257 
00258     if (!data_ptr) {
00259         return -1;
00260     }
00261     memcpy(data_ptr, data, len);
00262     data_len = len;
00263     tr_debug("service recv socket data len %d ", data_len);
00264 
00265     //parse coap message what CoAP to use
00266     int ret = coap_message_handler_coap_msg_process(coap_service_handle, socket_id, src_address, port, dst_address, data_ptr, data_len, &coap_msg_process_callback);
00267     own_free(data_ptr);
00268     return ret;
00269 }
00270 
00271 static int virtual_send_cb(int8_t socket_id, const uint8_t address[static 16], uint16_t port, const void *data_ptr, int data_len)
00272 {
00273     coap_service_t *this = service_find_by_socket(socket_id);
00274     if (this && this->virtual_socket_send_cb) {
00275         tr_debug("send to virtual socket, service: %d", this->service_id);
00276         return this->virtual_socket_send_cb(this->service_id, (uint8_t*)address, port, data_ptr, data_len);
00277     }
00278     return -1;
00279 }
00280 
00281 static void sec_done_cb(int8_t socket_id, uint8_t address[static 16], uint16_t port, uint8_t keyblock[static 40])
00282 {
00283     //TODO: this is not enough if shared socket. Inform all!
00284     coap_service_t *this = service_find_by_socket(socket_id);
00285     if (this && this->coap_security_done_cb) { // secure done callback
00286         this->coap_security_done_cb(this->service_id, address, keyblock);
00287     }
00288 
00289     //TODO: send all unsend transactions if more than 1
00290     coap_transaction_t *transaction_ptr = coap_message_handler_find_transaction(address, port);
00291     if (transaction_ptr && transaction_ptr->data_ptr) {
00292         tr_debug("send delayed packet");
00293         ns_address_t dest_addr;
00294         memcpy(dest_addr.address, address, 16);
00295         dest_addr.identifier = port;
00296         dest_addr.type = ADDRESS_IPV6;
00297 
00298         coap_connection_handler_send_data(this->conn_handler, &dest_addr, transaction_ptr->local_address,
00299                 transaction_ptr->data_ptr, transaction_ptr->data_len, (this->service_options & COAP_SERVICE_OPTIONS_SECURE_BYPASS) == COAP_SERVICE_OPTIONS_SECURE_BYPASS);
00300         ns_dyn_mem_free(transaction_ptr->data_ptr);
00301         transaction_ptr->data_ptr = NULL;
00302         transaction_ptr->data_len = 0;
00303         if (!transaction_ptr->resp_cb && transaction_ptr->req_msg_type == COAP_MSG_TYPE_NON_CONFIRMABLE) {
00304             transaction_delete(transaction_ptr);
00305         }
00306     }
00307 }
00308 
00309 static int get_passwd_cb(int8_t socket_id, uint8_t address[static 16], uint16_t port, coap_security_keys_t *security_ptr)
00310 {
00311     uint8_t *pw_ptr = NULL;
00312     uint8_t pw_len = 0;
00313     coap_service_t *this = service_find_by_socket(socket_id);
00314 
00315     if (!this || !security_ptr) {
00316         return -1;
00317     }
00318 
00319     /* Certificates set */
00320     if (this->conn_handler->security_keys) {
00321         *security_ptr = *this->conn_handler->security_keys;
00322         return 0;
00323     }
00324 
00325     pw_ptr = ns_dyn_mem_alloc(64);
00326     if (!pw_ptr) {
00327         return -1;
00328     }
00329 
00330     if (this->security_start_cb && !this->security_start_cb(this->service_id, address, port, pw_ptr, &pw_len)) {
00331         security_ptr->mode = ECJPAKE;
00332         security_ptr->_key = pw_ptr;
00333         security_ptr->_key_len = pw_len;
00334         return 0;
00335     }
00336 
00337     return -1;
00338 }
00339 
00340 int8_t coap_service_initialize(int8_t interface_id, uint16_t listen_port, uint8_t service_options,
00341                                  coap_service_security_start_cb *start_ptr, coap_service_security_done_cb *coap_security_done_cb)
00342 {
00343     coap_service_t *this = ns_dyn_mem_alloc(sizeof(coap_service_t));
00344 
00345     if (!this) {
00346         return -1;
00347     }
00348     memset(this, 0, sizeof(coap_service_t));
00349     tr_debug("service init interface %d, port %d, options %d", interface_id, listen_port, service_options);
00350 
00351     int8_t id = 1;// get unique id
00352     while (service_find(id) && id < 127) {
00353         id++;
00354     }
00355     this->interface_id = interface_id;
00356     this->service_id = id;
00357     this->service_options = service_options;
00358 
00359     this->security_start_cb = start_ptr;
00360     this->coap_security_done_cb = coap_security_done_cb;
00361 
00362     if (tasklet_id == -1) {
00363         tr_debug("service tasklet init");
00364         tasklet_id = eventOS_event_handler_create(&service_event_handler, ARM_LIB_TASKLET_INIT_EVENT);
00365     }
00366 
00367     this->conn_handler = connection_handler_create(recv_cb, virtual_send_cb, get_passwd_cb, sec_done_cb);
00368     if(!this->conn_handler){
00369         ns_dyn_mem_free(this);
00370         return -1;
00371     }
00372 
00373     this->conn_handler->socket_interface_selection = 0; // zero is illegal interface ID
00374     if (this->service_options & COAP_SERVICE_OPTIONS_SELECT_SOCKET_IF) {
00375         this->conn_handler->socket_interface_selection = this->interface_id;
00376     }
00377 
00378     this->conn_handler->registered_to_multicast = this->service_options & COAP_SERVICE_OPTIONS_MULTICAST_JOIN;
00379 
00380     if (0 > coap_connection_handler_open_connection(this->conn_handler, listen_port,
00381             (this->service_options & COAP_SERVICE_OPTIONS_EPHEMERAL_PORT),
00382             (this->service_options & COAP_SERVICE_OPTIONS_SECURE),
00383             !(this->service_options & COAP_SERVICE_OPTIONS_VIRTUAL_SOCKET),
00384             (this->service_options & COAP_SERVICE_OPTIONS_SECURE_BYPASS))) {
00385         ns_dyn_mem_free(this->conn_handler);
00386         ns_dyn_mem_free(this);
00387         return -1;
00388     }
00389 
00390     if (!coap_service_handle) {
00391         coap_service_handle = coap_message_handler_init(&own_alloc, &own_free, &coap_tx_function);
00392     }
00393     if (!coap_service_handle) {
00394         tr_error("coap service alloc failed");
00395         //TODO proper handling
00396     }
00397 
00398     ns_list_add_to_start(&instance_list, this);
00399 
00400     return id;
00401 }
00402 
00403 void coap_service_delete(int8_t service_id)
00404 {
00405     coap_service_t *this = service_find(service_id);
00406     if (!this) {
00407         return;
00408     }
00409 
00410     if (this->conn_handler){
00411         bool leave_multicast_group = false;
00412         if (coap_service_can_leave_multicast_group(this->conn_handler)) {
00413             // This is the last handler joined to multicast group
00414             leave_multicast_group = true;
00415         }
00416         connection_handler_destroy(this->conn_handler, leave_multicast_group);
00417     }
00418 
00419     //TODO clear all transactions
00420     ns_list_foreach_safe(uri_registration_t, cur_ptr, &this->uri_list) {
00421         ns_dyn_mem_free(cur_ptr->uri_ptr);
00422         ns_list_remove(&this->uri_list, cur_ptr);
00423         ns_dyn_mem_free(cur_ptr);
00424     }
00425 
00426     ns_list_remove(&instance_list, this);
00427     ns_dyn_mem_free(this);
00428     return;
00429 }
00430 
00431 extern void coap_service_close_secure_connection(int8_t service_id, uint8_t destination_addr_ptr[static 16], uint16_t port)
00432 {
00433     coap_service_t *this = service_find(service_id);
00434     if (!this || !destination_addr_ptr) {
00435         return;
00436     }
00437     if (this->conn_handler){
00438         connection_handler_close_secure_connection(this->conn_handler, destination_addr_ptr, port);
00439     }
00440 }
00441 
00442 int16_t coap_service_virtual_socket_recv(int8_t service_id, uint8_t source_addr_ptr[static 16], uint16_t port, uint8_t *data_ptr, uint16_t data_len)
00443 {
00444     coap_service_t *this = service_find(service_id);
00445     tr_debug("Service %d, virtual socket received", service_id);
00446     if (!this) {
00447         return -1;
00448     }
00449     return coap_connection_handler_virtual_recv(this->conn_handler, source_addr_ptr, port, data_ptr, data_len);
00450 }
00451 
00452 int16_t coap_service_virtual_socket_set_cb(int8_t service_id, coap_service_virtual_socket_send_cb *send_method_ptr)
00453 {
00454     coap_service_t *this = service_find(service_id);
00455     tr_debug("register virtual socket cb to service %d", service_id);
00456     if (!this) {
00457         return -1;
00458     }
00459     this->virtual_socket_send_cb = send_method_ptr;
00460     return 0;
00461 }
00462 
00463 int8_t coap_service_register_uri(int8_t service_id, const char *uri, uint8_t allowed_method, coap_service_request_recv_cb *request_recv_cb)
00464 {
00465     coap_service_t *this = service_find(service_id);
00466     uri_registration_t *uri_reg_ptr;
00467     char *uri_ptr = NULL;
00468     uint16_t uri_len;
00469     tr_debug("Service %d, Uri registration uri: %s", service_id, uri);
00470     if (!this || !uri) {
00471         return -1;
00472     }
00473     uri_len = strlen(uri);
00474 
00475     uri_reg_ptr = uri_registration_find(this, uri, uri_len);
00476     if (!uri_reg_ptr) {
00477         uri_reg_ptr = ns_dyn_mem_alloc(sizeof(uri_registration_t));
00478         if( !uri_reg_ptr ){
00479             tr_error("Uri registration failed, OOM");
00480             return -2;
00481         }
00482         uri_reg_ptr->uri_ptr = NULL;
00483     } else {
00484         ns_dyn_mem_free(uri_reg_ptr->uri_ptr);
00485         ns_list_remove(&this->uri_list, uri_reg_ptr);
00486     }
00487 
00488     uri_ptr = ns_dyn_mem_alloc(uri_len);
00489     if (!uri_ptr) {
00490         ns_dyn_mem_free(uri_reg_ptr);
00491         tr_error("Uri registration failed, OOM");
00492         return -2;
00493     }
00494 
00495     uri_reg_ptr->uri_ptr = memcpy(uri_ptr, uri, uri_len);
00496     uri_reg_ptr->uri_len = uri_len;
00497     uri_reg_ptr->request_recv_cb = request_recv_cb;
00498     uri_reg_ptr->allowed_method = allowed_method;
00499     ns_list_add_to_start(&this->uri_list, uri_reg_ptr);
00500     return 0;
00501 }
00502 
00503 int8_t coap_service_unregister_uri(int8_t service_id, const char *uri)
00504 {
00505     coap_service_t *this = service_find(service_id);
00506     uri_registration_t *uri_reg_ptr;
00507     tr_debug("Service %d, Uri unregistration uri: %s", service_id, uri);
00508     if (!this || !uri) {
00509         return -1;
00510     }
00511 
00512     uri_reg_ptr = uri_registration_find(this, uri, strlen(uri));
00513     if (!uri_reg_ptr) {
00514         return -2;
00515     }
00516 
00517     ns_dyn_mem_free(uri_reg_ptr->uri_ptr);
00518     ns_list_remove(&this->uri_list, uri_reg_ptr);
00519     ns_dyn_mem_free(uri_reg_ptr);
00520 
00521     return 0;
00522 }
00523 
00524 uint16_t coap_service_request_send(int8_t service_id, uint8_t options, const uint8_t destination_addr[static 16], uint16_t destination_port, sn_coap_msg_type_e msg_type, sn_coap_msg_code_e msg_code, const char *uri,
00525         sn_coap_content_format_e cont_type, const uint8_t *payload_ptr, uint16_t payload_len, coap_service_response_recv *request_response_cb){
00526     //TODO: coap_service_response_recv is an ugly cast, this should be refactored away + sn_coap_hdr_s MUST NOT be exposed to users of coap-service!
00527     //Callback would be still needed, but where to store callback?
00528     return coap_message_handler_request_send(coap_service_handle, service_id, options, destination_addr, destination_port, msg_type, msg_code, uri, cont_type, payload_ptr, payload_len, request_response_cb);
00529 }
00530 
00531 int8_t coap_service_response_send(int8_t service_id, uint8_t options, sn_coap_hdr_s *request_ptr, sn_coap_msg_code_e message_code, sn_coap_content_format_e content_type, const uint8_t *payload_ptr,uint16_t payload_len){
00532     return coap_message_handler_response_send(coap_service_handle, service_id, options, request_ptr, message_code, content_type, payload_ptr, payload_len);
00533 }
00534 
00535 int8_t coap_service_response_send_by_msg_id(int8_t service_id, uint8_t options, uint16_t msg_id, sn_coap_msg_code_e message_code, sn_coap_content_format_e content_type, const uint8_t *payload_ptr,uint16_t payload_len) {
00536     return coap_message_handler_response_send_by_msg_id(coap_service_handle, service_id, options, msg_id, message_code, content_type, payload_ptr, payload_len);
00537 }
00538 
00539 int8_t coap_service_request_delete(int8_t service_id, uint16_t msg_id)
00540 {
00541     return coap_message_handler_request_delete(coap_service_handle, service_id, msg_id);
00542 }
00543 
00544 int8_t coap_service_set_handshake_timeout(int8_t service_id, uint32_t min, uint32_t max)
00545 {
00546     coap_service_t *this = service_find(service_id);
00547     if(!this){
00548         return -1;
00549     }
00550 
00551     return coap_connection_handler_set_timeout(this->conn_handler, min, max);
00552 }
00553 
00554 int8_t coap_service_handshake_limits_set(uint8_t handshakes_max, uint8_t connections_max)
00555 {
00556     return coap_connection_handler_handshake_limits_set(handshakes_max, connections_max);
00557 }
00558 
00559 int8_t coap_service_set_duplicate_message_buffer(int8_t service_id, uint8_t size)
00560 {
00561     (void) service_id;
00562 
00563     if (!coap_service_handle) {
00564         return -1;
00565     }
00566 
00567     return sn_coap_protocol_set_duplicate_buffer_size(coap_service_handle->coap, size);
00568 }
00569 
00570 uint32_t coap_service_get_internal_timer_ticks(void)
00571 {
00572     return coap_ticks;
00573 }
00574 
00575 uint16_t coap_service_id_find_by_socket(int8_t socket_id)
00576 {
00577     coap_service_t *this = service_find_by_socket(socket_id);
00578 
00579     return this ? this->service_id:0;
00580 }
00581 
00582 int8_t coap_service_certificate_set(int8_t service_id, const unsigned char *cert, uint16_t cert_len, const unsigned char *priv_key, uint8_t priv_key_len)
00583 {
00584     coap_service_t *this = service_find(service_id);
00585     if (!this) {
00586         return -1;
00587     }
00588 
00589     if (!this->conn_handler->security_keys) {
00590         this->conn_handler->security_keys = ns_dyn_mem_alloc(sizeof(coap_security_keys_t));
00591 
00592         if (!this->conn_handler->security_keys) {
00593             return -1;
00594         }
00595     }
00596 
00597     memset(this->conn_handler->security_keys, 0, sizeof(coap_security_keys_t));
00598 
00599     this->conn_handler->security_keys->_cert = cert;
00600     this->conn_handler->security_keys->_cert_len = cert_len;
00601 
00602     this->conn_handler->security_keys->_priv_key = priv_key;
00603     this->conn_handler->security_keys->_priv_key_len = priv_key_len;
00604 
00605     this->conn_handler->security_keys->mode = CERTIFICATE;
00606 
00607     return 0;
00608 }