char * readChunkedMessage(xentoollog_logger *xc_logger, struct libxenvchan *ctrl, int *sz){
int headerSize = 8;
char * header = (char *) malloc ( headerSize * sizeof(char));
char * mesg;
int size;
//int i = 0;
char * chunk;
int chunkSize = 0;
char * p;
int messageSize = 0;
if ( header == NULL){
fprintf(stderr, "Error: Failed to allocate space for buffer\n");
perror("readChunkedMessage: read failed.");
exit(1);
}
//get Header
while(!libxenvchan_data_ready(ctrl)){
sleep(0.10);
}
size = libxenvchan_read(ctrl,header, headerSize);
if ( size != headerSize){
fprintf(stderr, "Error: libxenvchan_read return=%d. should be %d\n", size, headerSize);
perror("readChunkedMessage: read failed 1.");
exit(1);
}
messageSize = getSize(header+1);
// printf("messageSize: %d\n",messageSize);
*sz = messageSize;
/*
printf("HexDump\n");
for (i = 0; i < 5;i++){
printf("%2x ",header[i]);
}
printf("\n");
*/
//allocate space for entire message
mesg = (char *)malloc(sizeof(char) * messageSize);
if(mesg == NULL) {
char * lclErrStr = strerror(errno);
fprintf(stderr, "Error: %s: readChunkedMessage failed\n",
lclErrStr);
perror("readChunkedMessage: read failed");
}
p = mesg;
if (isChunked(header) ){
/* printf("Chunked Data\n");
printf("DataReady: %d\n",libxenvchan_data_ready(ctrl));
*/
while(!libxenvchan_data_ready(ctrl)){
sleep(0.10);
}
//get second size
size = libxenvchan_read(ctrl,header, headerSize-1);
//printf("finished read\n");
if ( size != headerSize-1){
fprintf(stderr, "libxenvchan_read return=%d. should be %d\n", size, headerSize-1);
perror("readChunkedMessage: read failed 2.");
//exit(1);
}
//printf("getting size\n");
chunkSize = getSize(header);
//printf("done with size: %d\n",chunkSize);
//allocate chunk
chunk = (char *)malloc(sizeof(char) *chunkSize);
if ( chunk == NULL){
fprintf(stderr, "Error: Failed to allocate space for chunk\n");
perror("readChunkedMessage: read failed.");
exit(1);
}
//read chunk
while(!libxenvchan_data_ready(ctrl)){
sleep(0.10);
}
size = libxenvchan_read(ctrl,chunk, chunkSize);
//printf("Reading Chunk\n");
if ( size != chunkSize){
fprintf(stderr, "libxenvchan_read return=%d. should be %d\n", size, chunkSize);
perror("readChunkedMessage: read failed 3.");
exit(1);
}
memcpy(p,chunk,chunkSize);
p= p+chunkSize;
free(chunk);
/* printf("HexDump\n");
for (i = 0; i < messageSize;i++){
printf("%2x ",mesg[i]);
}
printf("\n");
*/
while(p - mesg < messageSize){
//printf("DataReady: %d\n",libxenvchan_data_ready(ctrl));
if (libxenvchan_data_ready(ctrl)>headerSize){
size = libxenvchan_read(ctrl,header, headerSize);
if ( size != headerSize){
fprintf(stderr, "libxenvchan_read return=%d. should be %d\n", size, headerSize);
perror("readChunkedMessage: read failed 4.");
exit(1);
}
//printf("getting size2\n");
chunkSize = getSize(header+1);
//printf("done with size2: %d\n",chunkSize);
//allocate chunk
chunk = (char *)malloc(sizeof(char) *chunkSize);
if ( chunk == NULL){
fprintf(stderr, "Error: Failed to allocate space for chunk\n");
perror("readChunkedMessage: read failed.");
exit(1);
}
//loop until we have data ready
while (libxenvchan_data_ready(ctrl)<chunkSize){
sleep(0.10);
};
size = libxenvchan_read(ctrl,chunk, chunkSize);
if ( size != chunkSize){
fprintf(stderr, "libxenvchan_read return=%d. should be %d\n", size, chunkSize);
perror("readChunkedMessage: read failed 5.");
exit(1);
}
memcpy(p,chunk,chunkSize);
p= p+chunkSize;
free(chunk);
/* printf("Math: %d\n",p-mesg);
printf("HexDump\n");
for (i = 0; i < messageSize;i++){
printf("%2x ",mesg[i]);
}
*/
}
}
}else{
//printf("Not Chunked\n");
size = libxenvchan_read(ctrl,mesg,messageSize);
}
free(header);
/* printf("Size Data: %d\n",messageSize);
for (i = 0; i < messageSize; i++){
printf("%c",mesg[i]);
}
printf ("\n");
printf("HexDump\n");
for (i = 0; i < messageSize;i++){
printf("%2x ",mesg[i]);
}
printf("\n");
*/
return mesg;
}
int libvchan_data_ready(libvchan_t *ctrl) {
return libxenvchan_data_ready(ctrl->xenvchan);
}