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-rw-r--r--ucs2-afb/ucs_binding.c488
1 files changed, 488 insertions, 0 deletions
diff --git a/ucs2-afb/ucs_binding.c b/ucs2-afb/ucs_binding.c
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+++ b/ucs2-afb/ucs_binding.c
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+/*
+ * 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;
+}