1 files changed, 488 insertions, 0 deletions

diff --git a/ucs2-afb/ucs_binding.c b/ucs2-afb/ucs_binding.c
new file mode 100644
index 0000000..9be4a1b
--- /dev/null
+++ b/ucs2-afb/ucs_binding.c
@@ -0,0 +1,488 @@
+/*
+ * Copyright (C) 2016 "IoT.bzh"
+ * Author Fulup Ar Foll <fulup@iot.bzh>
+ *
+ * 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.
+ * 
+ * references:
+ *   https://gist.github.com/ghedo/963382
+ *   http://alsa-utils.sourcearchive.com/documentation/1.0.15/aplay_8c-source.html
+ */
+
+#define _GNU_SOURCE
+
+#define BUFFER_FRAME_COUNT 10 // max frames in buffer
+#define WAIT_TIMER_US 1000000 // default waiting timer 1s
+
+#include <systemd/sd-event.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+#include <time.h>
+#include <assert.h>
+#include <errno.h>
+
+#include "ucs_binding.h"
+#include "ucs_interface.h"
+
+
+
+#define MAX_FILENAME_LEN (100)
+#define RX_BUFFER (64)
+
+/** Internal structure, enabling multiple instances of this component.
+ * \note Do not access any of this variables.
+ *  */
+typedef struct {
+    int fileHandle;
+    int fileFlags;
+    char fileName[MAX_FILENAME_LEN];
+    uint8_t rxBuffer[RX_BUFFER];
+    uint32_t rxLen;
+} CdevData_t;
+
+
+typedef struct {
+  CdevData_t rx;
+  CdevData_t tx;
+  UCSI_Data_t ucsiData;
+  UCSI_channelsT *channels;
+} ucsContextT;
+
+static ucsContextT *ucsContextS;
+
+PUBLIC void UcsXml_CB_OnError(const char format[], uint16_t vargsCnt, ...) {
+    //DEBUG (afbIface, format, args);
+    va_list args;
+    va_start (args, format);
+    vfprintf (stderr, format, args);
+    va_end(args);
+}
+
+PUBLIC uint16_t UCSI_CB_OnGetTime(void *pTag) {
+    struct timespec currentTime;
+    uint16_t timer;
+    pTag = pTag;
+    
+    if (clock_gettime(CLOCK_MONOTONIC_RAW, &currentTime))   {
+        assert(false);
+        return 0;
+    }
+    
+    timer = (uint16_t) ((currentTime.tv_sec * 1000 ) + ( currentTime.tv_nsec / 1000000 ));
+    return(timer);        
+}
+
+STATIC int onTimerCB (sd_event_source* source,uint64_t timer, void* pTag) {
+    ucsContextT *ucsContext = (ucsContextT*) pTag;
+
+    sd_event_source_unref(source);    
+    UCSI_Timeout(&ucsContext->ucsiData);
+
+    return 0;
+}
+
+// UCS2 Interface Timer Callback
+PUBLIC void UCSI_CB_OnSetServiceTimer(void *pTag, uint16_t timeout) {
+  uint64_t usec;
+  // set a timer with  250ms accuracy 
+  sd_event_now(afb_daemon_get_event_loop(afbIface->daemon), CLOCK_BOOTTIME, &usec);  
+  sd_event_add_time(afb_daemon_get_event_loop(afbIface->daemon), NULL, CLOCK_MONOTONIC, usec + (timeout*1000), 250, onTimerCB, pTag);
+    
+}
+
+/**
+ * \brief Callback when ever an Unicens forms a human readable message.
+ *        This can be error events or when enabled also debug messages.
+ * \note This function must be implemented by the integrator
+ * \param pTag - Pointer given by the integrator by UCSI_Init
+ * \param format - Zero terminated format string (following printf rules)
+ * \param vargsCnt - Amount of parameters stored in "..."
+ */
+void UCSI_CB_OnUserMessage(void *pTag, const char format[],
+    uint16_t vargsCnt, ...) {
+    //DEBUG (afbIface, format, args);
+    va_list args;
+    va_start (args, format);
+    vfprintf (stderr, format, args);
+    va_end(args);
+}
+
+// UCSI_Service cannot be call directly within Unicens context, need to reset stack through mainloop
+STATIC int OnServiceRequiredCB (sd_event_source *source, uint64_t usec, void *pTag) {
+    ucsContextT *ucsContext = (ucsContextT*) pTag;
+    
+    sd_event_source_unref(source);
+    UCSI_Service(&ucsContext->ucsiData);
+    return (0);
+}
+
+// UCS Callback fire when ever pTag instance needs to be serviced
+PUBLIC void UCSI_CB_OnServiceRequired(void *pTag) {
+    
+   // push an asynchronous request for loopback to call UCSI_Service
+   sd_event_add_time(afb_daemon_get_event_loop(afbIface->daemon), NULL, CLOCK_MONOTONIC, 0, 0, OnServiceRequiredCB, pTag);
+}
+
+
+/**
+ * \brief Callback when ever a MOST error message was received.
+ * \note This function must be implemented by the integrator
+ * \param pTag - Pointer given by the integrator by UCSI_Init
+ * \note All following parameters belong to the usual MOST message
+ */
+PUBLIC void UCSI_CB_OnMostError(void *pTag, uint16_t sourceAddr,
+    uint8_t fblock, uint8_t inst, uint16_t function, uint8_t op,
+    const uint8_t *pPayload, uint32_t payloadLen) {
+    
+    // Error to send to syslog
+    DEBUG (afbIface, "OnMostError source=0x%x", sourceAddr);
+}
+
+
+
+// Callback when ever this instance wants to send a message to INIC.
+// BUGS?? Sample was returning true/false on error when integration layer expect a void [question from Fulup to Thorsten]
+PUBLIC void UCSI_CB_SendMostMessage(void *pTag, const uint8_t *pData, uint32_t len) {
+    
+    ucsContextT *ucsContext = (ucsContextT*) pTag;
+    CdevData_t *cdevTx = &ucsContext->tx;
+    uint32_t total = 0;
+    
+    
+    if (NULL == pData || 0 == len) return;
+    
+    if (O_RDONLY == cdevTx->fileFlags) return;
+    if (-1 == cdevTx->fileHandle)
+        cdevTx->fileHandle = open(cdevTx->fileName, cdevTx->fileFlags);
+    if (-1 == cdevTx->fileHandle)
+        return;
+    
+    while(total < len) {
+        ssize_t written = write(cdevTx->fileHandle, &pData[total], (len - total));
+        if (0 >= written)
+        {
+            cdevTx->fileHandle = -1;
+            return;
+        }
+        total += (uint32_t) written;
+    }
+    
+    return;    
+}
+
+/**
+ * \brief Callback when Unicens instance has been stopped.
+ * \note This event can be used to free memory holding the resources
+ *       passed with UCSI_NewConfig
+ * \note This function must be implemented by the integrator
+ * \param pTag - Pointer given by the integrator by UCSI_Init
+ */
+void UCSI_CB_OnStop(void *pTag) {
+    NOTICE (afbIface, "Unicens stopped");
+    
+}
+
+/**
+ * \brief Callback on Unicens management results.
+ * \note This function must be implemented by the integrator
+ * \param pTag - Pointer given by the integrator by UCSI_Init
+ * \param code - Result code
+ * \param nodeAddress - Node address of the device causing this event
+ * \param pNode - Pointer to node structure holding details of changed node
+ */
+extern void UCSI_CB_OnMgrReport(void *pTag, Ucs_MgrReport_t code, uint16_t nodeAddress, Ucs_Rm_Node_t *pNode) {
+    
+    DEBUG (afbIface, "OnMgrReport: Ucs_MgrReport_t=%d nodeAdresse=0x%x", code, nodeAddress);
+}
+
+bool Cdev_Init(CdevData_t *d, const char *fileName, bool read, bool write)
+{
+    if (NULL == d || NULL == fileName)  goto OnErrorExit;
+    
+    memset(d, 0, sizeof(CdevData_t));
+    strncpy(d->fileName, fileName, MAX_FILENAME_LEN);
+    d->fileHandle = -1;
+    
+    if (read && write)
+        d->fileFlags = O_RDWR | O_NONBLOCK;
+    else if (read)
+        d->fileFlags = O_RDONLY | O_NONBLOCK;
+    else if (write)
+        d->fileFlags = O_WRONLY | O_NONBLOCK;
+   
+    // open file to enable event loop
+    d->fileHandle = open(d->fileName, d->fileFlags);    
+    if (d->fileHandle  <= 0) goto OnErrorExit;
+    
+    return true;
+    
+ OnErrorExit:
+    return false;
+}
+
+static bool InitializeCdevs(ucsContextT *ucsContext)
+{
+    if(!Cdev_Init(&ucsContext->tx, CONTROL_CDEV_TX, false, true))
+        return false;
+    if(!Cdev_Init(&ucsContext->rx, CONTROL_CDEV_RX, true, false))
+        return false;
+    return true;
+}
+
+// Callback fire when something is avaliable on MOST cdev
+int onReadCB (sd_event_source* src, int fileFd, uint32_t revents, void* pTag) {
+    ucsContextT *ucsContext =( ucsContextT*) pTag;
+    ssize_t len;
+    uint8_t pBuffer[RX_BUFFER];
+    int ok;
+
+    len = read (ucsContext->rx.fileHandle, &pBuffer, sizeof(pBuffer));
+    
+    ok= UCSI_ProcessRxData(&ucsContext->ucsiData, pBuffer, (uint16_t)len);
+    if (!ok) {
+        DEBUG (afbIface, "Buffer overrun (not handle)");
+        // Buffer overrun could replay pBuffer
+    }
+    return(0);
+}
+
+STATIC UcsXmlVal_t* ParseFile(struct afb_req request) {
+    char *xmlBuffer;
+    ssize_t readSize;
+    int fdHandle ;
+    struct stat fdStat;
+    UcsXmlVal_t* ucsConfig; 
+
+    const char *filename = afb_req_value(request, "filename");
+    if (!filename) {
+        afb_req_fail_f (request, "filename-missing", "No filename given");
+        goto OnErrorExit;            
+    }
+    
+    fdHandle = open(filename, O_RDONLY);
+    if (fdHandle <= 0) {
+        afb_req_fail_f (request, "fileread-error", "File not accessible: '%s' err=%s", filename, strerror(fdHandle));
+        goto OnErrorExit;
+    }
+    
+    // read file into buffer as a \0 terminated string
+    fstat(fdHandle, &fdStat);
+    xmlBuffer = (char*)alloca(fdStat.st_size + 1);
+    readSize = read(fdHandle, xmlBuffer, fdStat.st_size);
+    close(fdHandle);
+    xmlBuffer[readSize] = '\0'; //In any case, terminate it.
+    
+    if (readSize != fdStat.st_size)  {
+        afb_req_fail_f (request, "fileread-fail", "File to read fullfile '%s' size(%d!=%d)", filename, readSize, fdStat.st_size);
+        goto OnErrorExit;
+    }
+   
+    ucsConfig = UcsXml_Parse(xmlBuffer);
+    if (!ucsConfig)  {
+        afb_req_fail_f (request, "filexml-error", "File XML invalid: '%s'", filename);
+        goto OnErrorExit;
+    }
+    
+    return (ucsConfig);
+    
+ OnErrorExit:
+    return NULL;
+}
+
+STATIC int volOnSvcCB (sd_event_source* source,uint64_t timer, void* pTag) {
+    ucsContextT *ucsContext = (ucsContextT*) pTag;
+
+    sd_event_source_unref(source);
+    UCSI_Vol_Service(&ucsContext->ucsiData);
+
+    return 0;
+}
+
+// This callback is fire each time an volume event wait in the queue
+void volumeCB (uint16_t timeout) {
+    uint64_t usec;
+    sd_event_now(afb_daemon_get_event_loop(afbIface->daemon), CLOCK_BOOTTIME, &usec);
+    sd_event_add_time(afb_daemon_get_event_loop(afbIface->daemon), NULL, CLOCK_MONOTONIC, usec + (timeout*1000), 250, volOnSvcCB, ucsContextS);
+}
+
+STATIC int volSndCmd (struct afb_req request, struct json_object *commandJ, ucsContextT *ucsContext) {
+    int numid, vol, err;
+    struct json_object *nameJ, *channelJ, *volJ;
+
+    enum json_type jtype= json_object_get_type(commandJ);
+    switch (jtype) {
+        case json_type_array:
+            if (!sscanf (json_object_get_string (json_object_array_get_idx(commandJ, 0)), "%d", &numid)) {
+                afb_req_fail_f (request, "channel-invalid","command=%s channel is not an integer", json_object_get_string (channelJ));
+                goto OnErrorExit;                        
+            }            
+            if (!sscanf (json_object_get_string (json_object_array_get_idx(commandJ, 1)), "%d", &vol)) {
+                afb_req_fail_f (request, "vol-invalid","command=%s vol is not an integer", json_object_get_string (channelJ));
+                goto OnErrorExit;                        
+            }            
+            break;
+            
+        case json_type_object:  
+            if (json_object_object_get_ex (commandJ, "numid", &channelJ)) {
+                if (!sscanf (json_object_get_string (channelJ), "%d", &numid)) {
+                    afb_req_fail_f (request, "channel-invalid","command=%s numid is not an integer", json_object_get_string (channelJ));
+                    goto OnErrorExit;                        
+                }            
+            } else {    
+                if (json_object_object_get_ex (commandJ, "channel", &nameJ)) {
+                    int idx;
+                    const char *name = json_object_get_string(nameJ);
+
+                    for (idx =0; ucsContext->channels[idx].name != NULL; idx++) {
+                        if (!strcasecmp(ucsContext->channels[idx].name, name)) {
+                            numid = ucsContext->channels[idx].numid;
+                            break;
+                        }
+                    }
+                    if (ucsContext->channels[idx].name == NULL) {
+                        afb_req_fail_f (request, "channel-invalid","command=%s channel name does not exist", name);
+                        goto OnErrorExit;            
+                    }            
+                } else {
+                    afb_req_fail_f (request, "channel-invalid","command=%s no valid channel name or channel", json_object_get_string(commandJ));
+                    goto OnErrorExit;            
+                };
+            }
+            
+            if (!json_object_object_get_ex (commandJ, "volume", &volJ)) {
+                afb_req_fail_f (request, "vol-missing","command=%s vol not present", json_object_get_string (commandJ));
+                goto OnErrorExit;                        
+            }
+    
+            if (!sscanf (json_object_get_string (volJ), "%d", &vol)) {
+                afb_req_fail_f (request, "vol-invalid","command=%s vol:%s is not an integer", json_object_get_string (commandJ), json_object_get_string (volJ));
+                goto OnErrorExit;                        
+            }
+
+            break;
+            
+        default:           
+            afb_req_fail_f (request, "setvol-invalid","command=%s not valid JSON Volume Command", json_object_get_string(commandJ));
+            goto OnErrorExit; 
+    }
+    
+    
+    // Fulup what's append when channel or vol are invalid ???
+    err = UCSI_Vol_Set  (&ucsContext->ucsiData, numid, (uint8_t) vol);
+    if (err) {
+        // Fulup this might only be a warning (not sure about it)
+        afb_req_fail_f (request, "vol-refused","command=%s vol was refused by unicens", json_object_get_string (volJ));
+        goto OnErrorExit; 
+    }
+    
+    return 0;
+    
+  OnErrorExit: 
+    return 1;
+}
+    
+
+PUBLIC void ucs2SetVol (struct afb_req request) {
+    struct json_object *queryJ;
+    int err;
+    
+    // check unicens is initialised
+    if (!ucsContextS) {
+        afb_req_fail_f (request, "unicens-init","Should Load Config before using setvol");
+        goto OnErrorExit;                
+    }
+    
+    queryJ = afb_req_json(request);
+    if (!queryJ) {
+        afb_req_fail_f (request, "query-notjson","query=%s not a valid json entry", afb_req_value(request,""));
+        goto OnErrorExit;        
+    };
+    
+    enum json_type jtype= json_object_get_type(queryJ);
+    switch (jtype) {
+        case json_type_array:
+            for (int idx=0; idx < json_object_array_length (queryJ); idx ++) {
+               err= volSndCmd (request, json_object_array_get_idx (queryJ, idx), ucsContextS); 
+               if (err) goto OnErrorExit;
+            }
+            break;
+            
+        case json_type_object:
+            err = volSndCmd (request, queryJ, ucsContextS);
+            if (err) goto OnErrorExit;
+            break;
+        
+        default:           
+            afb_req_fail_f (request, "query-notarray","query=%s not valid JSON Volume Command Array", afb_req_value(request,""));
+            goto OnErrorExit;        
+    }
+    
+
+    afb_req_success(request,NULL,NULL); 
+    
+ OnErrorExit:
+    return;
+}
+
+
+PUBLIC void ucs2Init (struct afb_req request) {
+    static UcsXmlVal_t *ucsConfig;
+    static ucsContextT ucsContext;
+
+    sd_event_source *evtSource;
+    int err;
+    
+    // Read and parse XML file
+    ucsConfig = ParseFile (request);
+    if (NULL == ucsConfig) goto OnErrorExit;
+    
+    // Fulup->Thorsten BUG InitializeCdevs should fail when control does not exit
+    if (!InitializeCdevs(&ucsContext))  {
+        afb_req_fail_f (request, "devnit-error", "Fail to initialise device [rx=%s tx=%s]", CONTROL_CDEV_RX, CONTROL_CDEV_TX);
+        goto OnErrorExit;
+    }
+
+    // Initialise Unicens Config Data Structure
+    UCSI_Init(&ucsContext.ucsiData, &ucsContext);
+    
+    // Initialise Unicens with parsed config
+    if (!UCSI_NewConfig(&ucsContext.ucsiData, ucsConfig))   {
+        afb_req_fail_f (request, "unicens-init", "Fail to initialize Unicens");
+        goto OnErrorExit;
+    }
+
+    // register aplayHandle file fd into binder mainloop
+    err = sd_event_add_io(afb_daemon_get_event_loop(afbIface->daemon), &evtSource, ucsContext.rx.fileHandle, EPOLLIN, onReadCB, &ucsContext);
+    if (err < 0) {
+        afb_req_fail_f (request, "register-mainloop", "Cannot hook events to mainloop");
+        goto OnErrorExit;
+    }
+    
+    // init Unicens Volume Library
+    ucsContext.channels = UCSI_Vol_Init (&ucsContext.ucsiData, volumeCB);
+    if (!ucsContext.channels) {
+        afb_req_fail_f (request, "register-volume", "Could not enqueue new Unicens config");
+        goto OnErrorExit;
+    }
+    // save this in a statical variable until ucs2vol move to C
+    ucsContextS = &ucsContext;
+            
+    afb_req_success(request,NULL,"unicens-active"); 
+    
+ OnErrorExit:
+    return;
+}