IPC using Unix Domain Sockets

Question

I have two different applications where one of them has to feed data into the other. I am using Unix domain sockets for communicating between them. The client hooks onto the soc

Answer 1

Well, I figured out the problem here. The issue was that I needed to create the socket connection anew everytime I wanted to transfer a packet over and close it after that. So, main for the server remains the same, but the client now becomes :

int main(int argc, char* argv[]) {

if (argc < 2) {
    printf("Usage: Operating_Mode Path_to_DAQ_dataset output_file cudaBF\n");
    printf("Operating_Mode = 0 : Real Time BF processing\nUsage: Operating_Mode output_file cudaBF\n");
    printf("Operating_Mode = 1 : Pre-recorded data BF processing\nUsage: Operating_Mode Path_to_DAQ_dataset output_file cudaBF\n");
    return 1;
}

int packetTransferCount;
pthread_t threadBF;

struct beamRecordedArgs processParams;
processParams.dataPath = argv[2];
processParams.bfOutputFile = argv[3];

pthread_create(&threadBF,NULL,beamProcessRecorded,(void *)&processParams);

packetTransferCount = 0;
while(processStatus != COMPLETE){
if(processStatus == TRANSFER){
/****************************************************************/ 
/*This part was outside the loop, moving it inside creates a new 
socket connector everytime I was to transfera packet and I close it before 
the loops ends */       
    int s, len;
struct sockaddr_un remote;

    if ((s = socket(AF_UNIX,SOCK_STREAM, 0)) == -1) {
    perror("socket");
}

remote.sun_family = AF_UNIX;
strcpy(remote.sun_path, SOCKET_DISPLAY_PATH);
len = strlen(remote.sun_path) + sizeof(remote.sun_family);    
/****************************************************************/  
    printf("Checking for display...\n");
    int dispConStatus = connect(s, (struct sockaddr *)&remote, len);
    if ( dispConStatus == -1) {
        printf("No display process found\n");
        processStatus = PROCESS;
    }
    else{
        printf("Display process found.. Transferring packet\n");
        send(s, txPackDisp, sizeof(txPackDisp), 0);
        processStatus = PROCESS;
        printf("PACKETS TRANSFERRED : %d\n",++packetTransferCount);
    }
    close(s);
}
else{
    while(processStatus == PROCESS){
        //sleep(1);
    }
}
}

pthread_join(threadBF,NULL);

return 0;
}