Toyomasa Watarai / Mbed 2 deprecated WiFly_NSDL_HelloWorld

Sensinode NSDL demo with WiFi interface

Dependencies:   Beep C12832_lcd LM75B MMA7660 WiflyInterface mbed-rtos mbed nsdl_lib

Fork of NSDL_HelloWorld by Sensinode

resources/temperature.cpp@3:52c1b649eb04, 2013-10-15 (annotated)

Committer:
bogdanm
Date:
Tue Oct 15 15:48:23 2013 +0000
Revision:
3:52c1b649eb04
Parent:
2:7e489126fe7a 
Fixes buffer overflows, invalid server address and other issues.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 2:7e489126fe7a 1 // Temperature resource implementation
bogdanm 2:7e489126fe7a 2
bogdanm 2:7e489126fe7a 3 #include "mbed.h"
bogdanm 2:7e489126fe7a 4 #include "rtos.h"
bogdanm 2:7e489126fe7a 5 #include "LM75B.h"
bogdanm 2:7e489126fe7a 6 #include "nsdl_support.h"
bogdanm 2:7e489126fe7a 7 #include "temperature.h"
bogdanm 2:7e489126fe7a 8
bogdanm 2:7e489126fe7a 9 #define TEMP_RES_ID "sen/temp"
bogdanm 2:7e489126fe7a 10
bogdanm 2:7e489126fe7a 11 static LM75B tmp(p28,p27);
bogdanm 2:7e489126fe7a 12 /* stored data for observable resource */
bogdanm 2:7e489126fe7a 13 static uint8_t obs_number = 0;
bogdanm 3:52c1b649eb04 14 static uint8_t *obs_token_ptr = NULL;
bogdanm 2:7e489126fe7a 15 static uint8_t obs_token_len = 0;
bogdanm 2:7e489126fe7a 16 static char temp_val[5];
bogdanm 2:7e489126fe7a 17 extern Serial pc;
bogdanm 2:7e489126fe7a 18
bogdanm 2:7e489126fe7a 19 /* Thread for calling libNsdl exec function (cleanup, resendings etc..) */
bogdanm 2:7e489126fe7a 20 /* Node updates temperature every 10 seconds. Notification sending is done here. */
bogdanm 2:7e489126fe7a 21 static void exec_call_thread(void const *args)
bogdanm 2:7e489126fe7a 22 {
bogdanm 2:7e489126fe7a 23 int32_t time = 0;
bogdanm 2:7e489126fe7a 24 while (true)
bogdanm 2:7e489126fe7a 25 {
bogdanm 2:7e489126fe7a 26 wait(1);
bogdanm 2:7e489126fe7a 27 time++;
bogdanm 2:7e489126fe7a 28 sn_nsdl_exec(time);
bogdanm 3:52c1b649eb04 29 if((!(time % 10)) && obs_number != 0 && obs_token_ptr != NULL)
bogdanm 2:7e489126fe7a 30 {
bogdanm 2:7e489126fe7a 31 obs_number++;
bogdanm 2:7e489126fe7a 32 sprintf(temp_val,"%2.2f" ,tmp.read());
bogdanm 2:7e489126fe7a 33 if(sn_nsdl_send_observation_notification(obs_token_ptr, obs_token_len, (uint8_t*)temp_val, 5, &obs_number, 1, COAP_MSG_TYPE_NON_CONFIRMABLE, 0) == 0)
bogdanm 2:7e489126fe7a 34 pc.printf("Observation sending failed\r\n");
bogdanm 2:7e489126fe7a 35 else
bogdanm 2:7e489126fe7a 36 pc.printf("Observation\r\n");
bogdanm 2:7e489126fe7a 37 }
bogdanm 2:7e489126fe7a 38 }
bogdanm 2:7e489126fe7a 39 }
bogdanm 2:7e489126fe7a 40
bogdanm 2:7e489126fe7a 41 /* Only GET method allowed */
bogdanm 2:7e489126fe7a 42 /* Observable resource */
bogdanm 2:7e489126fe7a 43 static uint8_t temp_resource_cb(sn_coap_hdr_s *received_coap_ptr, sn_nsdl_addr_s *address, sn_proto_info_s * proto)
bogdanm 2:7e489126fe7a 44 {
bogdanm 2:7e489126fe7a 45 sprintf(temp_val,"%2.2f" ,tmp.read());
bogdanm 2:7e489126fe7a 46 sn_coap_hdr_s *coap_res_ptr = 0;
bogdanm 2:7e489126fe7a 47
bogdanm 3:52c1b649eb04 48 pc.printf("temp callback\r\n");
bogdanm 2:7e489126fe7a 49 coap_res_ptr = sn_coap_build_response(received_coap_ptr, COAP_MSG_CODE_RESPONSE_CONTENT);
bogdanm 2:7e489126fe7a 50
bogdanm 2:7e489126fe7a 51 coap_res_ptr->payload_len = 5;
bogdanm 2:7e489126fe7a 52 coap_res_ptr->payload_ptr = (uint8_t*)temp_val;
bogdanm 2:7e489126fe7a 53
bogdanm 2:7e489126fe7a 54 if(received_coap_ptr->token_ptr)
bogdanm 2:7e489126fe7a 55 {
bogdanm 2:7e489126fe7a 56 pc.printf("Token included\r\n");
bogdanm 2:7e489126fe7a 57 if(obs_token_ptr)
bogdanm 2:7e489126fe7a 58 {
bogdanm 2:7e489126fe7a 59 free(obs_token_ptr);
bogdanm 2:7e489126fe7a 60 obs_token_ptr = 0;
bogdanm 2:7e489126fe7a 61 }
bogdanm 2:7e489126fe7a 62 obs_token_ptr = (uint8_t*)malloc(received_coap_ptr->token_len);
bogdanm 2:7e489126fe7a 63 if(obs_token_ptr)
bogdanm 2:7e489126fe7a 64 {
bogdanm 2:7e489126fe7a 65 memcpy(obs_token_ptr, received_coap_ptr->token_ptr, received_coap_ptr->token_len);
bogdanm 2:7e489126fe7a 66 obs_token_len = received_coap_ptr->token_len;
bogdanm 2:7e489126fe7a 67 }
bogdanm 2:7e489126fe7a 68 }
bogdanm 2:7e489126fe7a 69
bogdanm 2:7e489126fe7a 70 if(received_coap_ptr->options_list_ptr->observe)
bogdanm 2:7e489126fe7a 71 {
bogdanm 2:7e489126fe7a 72 coap_res_ptr->options_list_ptr = (sn_coap_options_list_s*)malloc(sizeof(sn_coap_options_list_s));
bogdanm 2:7e489126fe7a 73 memset(coap_res_ptr->options_list_ptr, 0, sizeof(sn_coap_options_list_s));
bogdanm 2:7e489126fe7a 74 coap_res_ptr->options_list_ptr->observe_ptr = &obs_number;
bogdanm 2:7e489126fe7a 75 coap_res_ptr->options_list_ptr->observe_len = 1;
bogdanm 2:7e489126fe7a 76 obs_number++;
bogdanm 2:7e489126fe7a 77 }
bogdanm 2:7e489126fe7a 78
bogdanm 2:7e489126fe7a 79 sn_nsdl_send_coap_message(address, coap_res_ptr);
bogdanm 2:7e489126fe7a 80
bogdanm 2:7e489126fe7a 81 coap_res_ptr->options_list_ptr->observe_ptr = 0;
bogdanm 2:7e489126fe7a 82 sn_coap_parser_release_allocated_coap_msg_mem(coap_res_ptr);
bogdanm 2:7e489126fe7a 83 return 0;
bogdanm 2:7e489126fe7a 84 }
bogdanm 2:7e489126fe7a 85
bogdanm 2:7e489126fe7a 86 int create_temperature_resource(sn_nsdl_resource_info_s *resource_ptr)
bogdanm 2:7e489126fe7a 87 {
bogdanm 3:52c1b649eb04 88 static Thread exec_thread(exec_call_thread);
bogdanm 2:7e489126fe7a 89
bogdanm 2:7e489126fe7a 90 nsdl_create_dynamic_resource(resource_ptr, sizeof(TEMP_RES_ID)-1, (uint8_t*)TEMP_RES_ID, 0, 0, 1, &temp_resource_cb, SN_GRS_GET_ALLOWED);
bogdanm 2:7e489126fe7a 91 return 0;
bogdanm 2:7e489126fe7a 92 }