Diff: NSDL/nsdl_support.cpp

Revision:

0:7809547930d9

Child:

2:30f4a0dab604

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/NSDL/nsdl_support.cpp	Wed Feb 11 22:13:25 2015 +0000
@@ -0,0 +1,202 @@
+// NSDL library support functions
+
+#include "mbed.h"
+#include "nsdl_support.h"
+
+#include "mbedConnectorInterface.h"
+
+// we have to redefine DBG as its used differently here...
+#ifdef DBG
+    #undef DBG
+#endif
+#define DBG  std::printf
+
+#include "rtos.h"
+
+#include "UDPSocket.h"
+#include "Endpoint.h"
+
+Endpoint nsp;
+UDPSocket server;
+
+char null_endpoint_name[] = "";
+char null_domain[] = "";
+uint8_t null_ep_type[] = "";
+uint8_t null_lifetime_ptr[] = "";
+
+void *nsdl_alloc(uint16_t size) {
+    void *chunk = NULL;
+    if (size > 0) chunk = malloc(size);
+    if (chunk != NULL && size > 0) memset(chunk,0,size);
+    return chunk;
+}
+
+void nsdl_free(void* ptr_to_free) {
+    if (ptr_to_free != NULL) free(ptr_to_free);
+}
+
+/*
+ * Create a static resoure
+ * Only get is allowed
+ */
+void nsdl_create_static_resource(sn_nsdl_resource_info_s *resource_structure, uint16_t pt_len, uint8_t *pt, uint16_t rpp_len, uint8_t *rpp_ptr, uint8_t *rsc, uint16_t rsc_len)
+{
+    resource_structure->access = SN_GRS_GET_ALLOWED;
+    resource_structure->mode = SN_GRS_STATIC;
+    resource_structure->pathlen = pt_len;
+    resource_structure->path = pt;
+    resource_structure->resource_parameters_ptr->resource_type_len = rpp_len;
+    resource_structure->resource_parameters_ptr->resource_type_ptr = rpp_ptr;
+    resource_structure->resource = rsc;
+    resource_structure->resourcelen = rsc_len;
+    sn_nsdl_create_resource(resource_structure);
+}
+
+void nsdl_create_dynamic_resource(sn_nsdl_resource_info_s *resource_structure, uint16_t pt_len, uint8_t *pt, uint16_t rpp_len, uint8_t *rpp_ptr, uint8_t is_observable, sn_grs_dyn_res_callback_t callback_ptr, int access_right)
+{
+    resource_structure->access = (sn_grs_resource_acl_e)access_right;
+    resource_structure->resource = 0;
+    resource_structure->resourcelen = 0;
+    resource_structure->sn_grs_dyn_res_callback = callback_ptr;
+    resource_structure->mode = SN_GRS_DYNAMIC;
+    resource_structure->pathlen = pt_len;
+    resource_structure->path = pt;
+    resource_structure->resource_parameters_ptr->resource_type_len = rpp_len;
+    resource_structure->resource_parameters_ptr->resource_type_ptr = rpp_ptr;
+    resource_structure->resource_parameters_ptr->observable = is_observable;
+    sn_nsdl_create_resource(resource_structure);
+}
+
+sn_nsdl_ep_parameters_s* nsdl_init_register_endpoint(sn_nsdl_ep_parameters_s *endpoint_structure, uint8_t *domain, uint8_t* name, uint8_t* typename_ptr, uint8_t *lifetime_ptr) {
+    if (endpoint_structure == NULL) {   
+        endpoint_structure = (sn_nsdl_ep_parameters_s*)nsdl_alloc(sizeof(sn_nsdl_ep_parameters_s));
+    }
+    
+    if (endpoint_structure != NULL) {
+        memset(endpoint_structure, 0, sizeof(sn_nsdl_ep_parameters_s));
+        endpoint_structure->endpoint_name_ptr = name;
+        endpoint_structure->endpoint_name_len = strlen((char*)name);
+        endpoint_structure->domain_name_ptr = domain;
+        endpoint_structure->domain_name_len = strlen((char *)domain);
+        endpoint_structure->type_ptr = typename_ptr;
+        endpoint_structure->type_len =  strlen((char*)typename_ptr);
+        endpoint_structure->lifetime_ptr = lifetime_ptr;
+        endpoint_structure->lifetime_len =  strlen((char*)lifetime_ptr);
+    }
+    
+    return endpoint_structure;
+}
+
+void nsdl_clean_register_endpoint(sn_nsdl_ep_parameters_s **endpoint_structure) {
+    if (endpoint_structure != NULL) {
+        if (*endpoint_structure != NULL) {
+            nsdl_free(*endpoint_structure);
+            *endpoint_structure = NULL;
+        }
+    }
+}
+
+static uint8_t tx_cb(sn_nsdl_capab_e protocol, uint8_t *data_ptr, uint16_t data_len, sn_nsdl_addr_s *address_ptr) {
+    //DBG("NSP: sending %d bytes...\r\n",data_len);
+    int sent = server.sendTo(nsp, (char*)data_ptr, data_len);
+    return 1;
+}
+
+static uint8_t rx_cb(sn_coap_hdr_s *coap_packet_ptr, sn_nsdl_addr_s *address_ptr) {
+    // Rx callback process it...
+    //DBG("NSP: received data. processing...\r\n");
+    return 0;
+}
+
+void register_endpoint(bool init) {
+    sn_nsdl_ep_parameters_s *endpoint_ptr = NULL;
+    if (init) {
+        endpoint_ptr = nsdl_init_register_endpoint(endpoint_ptr, (uint8_t *)domain_name, (uint8_t*)endpoint_name, ep_type, lifetime_ptr);
+        if(sn_nsdl_register_endpoint(endpoint_ptr) != 0)
+            DBG("NSP initial registration failed\r\n");
+        else
+            DBG("NSP initial registration OK\r\n");
+    }
+    else {
+        endpoint_ptr = nsdl_init_register_endpoint(endpoint_ptr, (uint8_t *)null_domain, (uint8_t*)null_endpoint_name, null_ep_type, null_lifetime_ptr);
+        if(sn_nsdl_update_registration(endpoint_ptr) != 0)
+            DBG("NSP re-registration failed\r\n");
+        else
+            DBG("NSP re-registration OK\r\n");
+    }
+    nsdl_clean_register_endpoint(&endpoint_ptr);
+}
+
+void registration_update_thread(void const *args) {
+    int count = -1;
+    int registration_time = 15;      // about 30 seconds if iteration every 2 seconds
+    
+    // first we want to wait a bit... let the endpoint crank up...
+    Thread::wait(NSP_RD_UPDATE_PERIOD);   // wait about 30 seconds, then go ahead and start the re-registration interval...  
+                
+    // now loop this thread forever sleeping and re-registering at the right iteration.
+    while(true) {
+        Thread::wait(MAIN_LOOP_SLEEP);
+        ++count;
+        if (count%registration_time == 0) {
+            // re-registration time!
+            count = 0;
+            DBG("NSP: (re)registering...\r\n");
+            register_endpoint(false);
+            DBG("NSP: (re)registering complete.\r\n");
+        }
+    }
+}
+
+void nsdl_init() {    
+    sn_nsdl_mem_s memory_cbs;
+    
+    // initilize the UDP channel
+    server.init();
+    server.bind(nsp_port);
+    
+    /* Initialize libNsdl */
+    memset(&memory_cbs,0,sizeof(memory_cbs));
+    memory_cbs.sn_nsdl_alloc = &nsdl_alloc;
+    memory_cbs.sn_nsdl_free = &nsdl_free;
+    if(sn_nsdl_init(&tx_cb, &rx_cb, &memory_cbs) == -1) {
+        DBG("NSP: libNsdl init failed.\r\n");
+    }
+    else {
+        DBG("NSP: libNsdl init successful.\r\n");
+    }
+}
+
+void nsdl_set_nsp_address(void) {
+    char NSP_address_str[16];
+    
+    /* Set nsp address for library */
+    sprintf(NSP_address_str,"%d.%d.%d.%d",NSP_address_bytes[0],NSP_address_bytes[1],NSP_address_bytes[2],NSP_address_bytes[3]);
+    DBG("NSP: libNsdl NSP_ADDRESS: %s port: %d\r\n",NSP_address_str,nsp_port);
+    set_NSP_address(NSP_address_bytes, nsp_port, SN_NSDL_ADDRESS_TYPE_IPV4);
+    nsp.set_address(NSP_address_str,nsp_port);
+}
+
+// NSP event loop - spawn a re-registration thread AFTER we have initially registered and begun event processing...     
+void nsdl_event_loop() {    
+    sn_nsdl_addr_s received_packet_address; 
+    Endpoint from;
+    uint8_t nsp_received_address[4];
+    char nsp_buffer[1024];
+
+    memset(&received_packet_address, 0, sizeof(sn_nsdl_addr_s));
+    memset(nsp_received_address, 0, sizeof(nsp_received_address));
+    received_packet_address.addr_ptr = nsp_received_address;    
+            
+    // start the registration update thread.. it will wait a bit while the endpoint gins up...
+    Thread registration_thread(registration_update_thread);
+    
+    // FOREVER: main loop for event processing  
+    while(true) {     
+        //DBG("NSP: waiting for data...\r\n");
+        int n = server.receiveFrom(from,nsp_buffer,sizeof(nsp_buffer));
+
+        //DBG("NSP: received %d bytes... processing..\r\n.",n);
+        if (n >= 0) sn_nsdl_process_coap((uint8_t*)nsp_buffer,n,&received_packet_address);        
+     }
+}
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