/*****************************************************************************
* read_mcapi_pkt
*****************************************************************************/
int read_mcapi_pkt(int index, char* buf, int buf_size)
{
mcapi_status_t status;
size_t pktsize = 0;
char* tmpbuf;
mcapi_pktchan_recv(pkt_hndls[index].recv, (void **) ((void*)&tmpbuf), &pktsize, &status);
if (status != MCAPI_SUCCESS) {
th_log_error("Task id %d failed to recv packet: %s\n",
index, mcapi_display_status(status,status_buff,sizeof(status_buff)));
return -1;
} else {
strncpy(buf, tmpbuf, pktsize);
mcapi_pktchan_release((void *)tmpbuf, &status);
if (status != MCAPI_SUCCESS){
th_log_error("Task id %d failed to free a buffer: %s\n",
index, mcapi_display_status(status,status_buff,sizeof(status_buff)));
return -1;
}
}
return (int) pktsize;
}
int main()
{
//status message received in almost all MCAPI-calls
mcapi_status_t status;
//info-struct received in initialization
mcapi_info_t info;
//the status code converted to string
char status_msg[MCAPI_MAX_STATUS_MSG_LEN];
//an iterator used in loops
unsigned int i = 0;
//request handle is used to operate wait-calls
mcapi_request_t request;
//size parameter required in some calls
size_t size = 1;
//send-handle used in channel-messaging
mcapi_pktchan_send_hndl_t handy;
//a separate receive buffer used for messages
char recv_msg[MAX_MSG_LEN];
//get our stuff here. tip: if signed were used, it bastardized the values
unsigned char* recv_buf;
//the endpoints used in channel-oriented communication
mcapi_endpoint_t green_chan;
mcapi_endpoint_t yellow_chan;
mcapi_endpoint_t green_msg_point;
printf( COLOR "here\n");
//we are the green
mcapi_initialize( THE_DOMAIN, GREEN_NODE, 0, 0, &info, &status );
check( MCAPI_SUCCESS, status );
//create our message endpoint
green_msg_point = mcapi_endpoint_create( GREEN_MSG, &status );
check( MCAPI_SUCCESS, status );
//wait for the start signal
mcapi_msg_recv(green_msg_point, recv_msg, MAX_MSG_LEN, &size,
&status );
check( MCAPI_SUCCESS, status );
printf(COLOR "signal received, starting to connect & open\n");
//create our channel message endpoint
green_chan = mcapi_endpoint_create( GREEN_PKT, &status );
check( MCAPI_SUCCESS, status );
//get their channel message endpoint
yellow_chan = mcapi_endpoint_get( THE_DOMAIN,
YELLOW_NODE, YELLOW_PKT, TIMEOUT, &status );
check( MCAPI_SUCCESS, status );
//form the channel
mcapi_pktchan_connect_i( yellow_chan, green_chan, &request, &status );
check( MCAPI_PENDING, status );
//wait for it to happen
mcapi_wait( &request, &size, TIMEOUT, &status );
check( MCAPI_SUCCESS, status );
//open our end
mcapi_pktchan_recv_open_i( &handy, green_chan, &request, &status );
check( MCAPI_PENDING, status );
//wait for it to happen
mcapi_wait( &request, &size, TIMEOUT, &status );
check( MCAPI_SUCCESS, status );
printf(COLOR "beginning the receive\n");
//start to receive our stuff
mcapi_pktchan_recv( handy, (void*)&recv_buf, &size, &status );
check( MCAPI_SUCCESS, status );
printf(COLOR "retrieval done, closing\n");
//close our end
mcapi_pktchan_recv_close_i( handy, &request, &status );
check( MCAPI_PENDING, status );
//wait for it to happen
mcapi_wait( &request, &size, TIMEOUT, &status );
check( MCAPI_SUCCESS, status );
printf(COLOR "closed, go over the values\n");
//go through that stuff
//i+=2 because our values are two bytes while buf is one byte
for ( i = 0; i < size; i+=2 )
{
//reconstruct the short
short sumval = recv_buf[i+1] << 8 | recv_buf[i];
//printf( COLOR "%hX %hhX %hhX\n", sumval, recv_buf[i], recv_buf[i+1] );
}
printf(COLOR "buffer release and shut down\n");
//release
mcapi_pktchan_release( recv_buf, &status );
check( MCAPI_SUCCESS, status );
//finalize at the end, regardless of which process we are
mcapi_finalize( &status );
check( MCAPI_SUCCESS, status );
return EXIT_SUCCESS;
}
