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POSocket and thread in C
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2012-04-27T10:25:14.710
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2012-05-16T17:02:17.497
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2012-05-16T17:02:17.497
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I have the following code: The file is <code>principal.c</code> that it has the function main and others methods. In main(): <pre><code>connectAll(&NUM_THREADS); printf("TOTAL clients that to connect %d\n",NUM_THREADS); pthread_t thread[NUM_THREADS]; pthread_attr_t attr; /* Initialize and set thread detached attribute */ pthread_attr_init(&attr); pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); paramThread params[NUM_THREADS]; for(t=0;t<NUM_THREADS;t++) { printf("What's IP [%s] to connected now? %d\n",regIPConnected[t].ip,regIPConnected[t].idSocket); params[t].idSocket=regIPConnected[t].idSocket; params[t].idThread=t; rc = pthread_create(&(thread[t]), &attr,conectaThread, &(params[t])); if (rc) { printf("ERROR; return code from pthread_create() is %d\n", rc); } }//END FOR /* Free attribute and wait for the other threads */ pthread_attr_destroy(&attr); for(t=0; t<NUM_THREADS; t++) { rc = pthread_join(thread[t], &status); if (rc<0) { printf("ERROR; return code from pthread_join() is %d\n", rc); } printf("Main: completed join with thread %ld having a status of %ld\n",t,(long)status); }//END FOR printf("Main: program completed. Exiting.\n"); pthread_exit(NULL); } void *conectaThread (void *arg){ paramThread* params = (paramThread*) &arg; int idSocket=params->idSocket; long tid=params->idThread; printf("Thread %ld starting...\n",tid); printf ("ID SOCKET THREAD %d\n",idSocket); while (1) /* Run forever */ { int state=readSocket(idSocket,"status\n"); ... } </code></pre> The structure of paramThread is: <pre><code>typedef struct { int idSocket; long idThread; void (*pf)(int, long); } paramThread; </code></pre> And another file, called socket.c <pre><code>int openSocketInet (char *servIP,unsigned short servPort) { int optval,statusSocket=0; socklen_t optlen = sizeof(optval); /* Create the socket, using TCP */ socketClient = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP); printf("OK/NOK socket %d",socketClient); if (socketClient<0) { switch (errno) { /*differents cases of errno*/ default: perror("socket()"); statusSocket= -1; }//END SWITCH }//END IF /* Check the status for the keepalive option */ if(getsockopt(socketClient, SOL_SOCKET, SO_KEEPALIVE, &optval, &optlen) < 0 && statusSocket==0) { statusSocket=checkGET_SETSockOpt(socketClient,1); printf("Error getsockopt() is %d\n",statusSocket); }//END IF printf("SO_KEEPALIVE is %s\n", (optval ? "ON" : "OFF")); int fl = fcntl(socketClient, F_GETFL); fcntl(socketClient, F_SETFL, fl | O_NONBLOCK); /* Set the option active */ optval = 1; //-->TRUE optlen = sizeof(optval); if(setsockopt(socketClient, SOL_SOCKET, SO_KEEPALIVE, &optval, optlen) < 0 && statusSocket==0) { statusSocket=checkGET_SETSockOpt(socketClient,0); printf("Error setsockopt() is %d\n",statusSocket); }//END IF printf("SO_KEEPALIVE set on socket\n"); /* Check the status again */ if(getsockopt(socketClient, SOL_SOCKET, SO_KEEPALIVE, &optval, &optlen) < 0 && statusSocket==0) { statusSocket=checkGET_SETSockOpt(socketClient,1); printf("Error getsockopt() is %d\n",statusSocket); }//END IF printf("SO_KEEPALIVE is %s\n", (optval ? "ON" : "OFF")); if (connect(socketClient, (struct sockaddr *)&addressServer, sizeof(addressServer)) < 0 && statusSocket==0) { switch (errno) { /*diffents cases of errno to connect()*/ default: perror("connect()"); statusSocket= -1; }//END SWITCH }//END IF /* Construct the server address structure */ bzero(&addressServer, sizeof(addressServer)); /* Hay que poner todo a ceros */ addressServer.sin_family = AF_INET; /* Internet address family */ addressServer.sin_port = htons(servPort); /* puerto en formato de red */ /* dirección IP en formato de red */ int errInetAton=inet_aton(servIP, &addressServer.sin_addr); if (errInetAton<0 && statusSocket==0) { printf("Fail the conversion of IP\n",servIP); perror("inet_aton() Motive"); statusSocket= -1; }//END IF printf("The IP %s to connect with sock %d\n",servIP,socketClient); //To return identify a socket or fail if (statusSocket<0) return statusSocket; else return socketClient; } </code></pre> When I running the result is: <pre> socket(): Success --> to sock 3 SO_KEEPALIVE is OFF SO_KEEPALIVE set on socket SO_KEEPALIVE is ON The IP x.x.x.x to connect with sock 3 socket(): Illegal seek --> to sock 4 SO_KEEPALIVE is OFF SO_KEEPALIVE set on socket SO_KEEPALIVE is ON The IP y.y.y.y to connect with sock 4 </pre> I wish I could connect to different ip having the same socket <hr> Thanks, the problem is another: <pre><code>What's IP [x.x.x.x] to connected now? 3 What's IP [y.y.y.y] to connected now? 4 What's IP [z.z.z.z] to connected now? 5 Out for Thread 5 starting... ID SOCKET THREAD 5 Method READ! Send to socket id [5] and data is '[status]' STATUS THREAD 0 Thread 5 starting... ID SOCKET THREAD 5 Method READ! Send to socket id [5] and data is '[status]' Thread 5 starting... ID SOCKET THREAD 5 Method READ! Send to socket id [5] and data is '[status]' STATUS THREAD 0 Info: (-3.35 dB) Method WRITE! Send to socket id [5] and data is '[outlevel 0:50 ]' El conector estÃ¡ marcado como no bloqueante y la operaciÃ³n solicitada lo bloquearÃa. Method WRITE! Error send() is 0 Level modify of Vol 50% Info: (-24.13 dB) Level modify of Vol 50% Info: (-52.60 dB) Method WRITE! Send to socket id [5] and data is '[outlevel 0:50 ]' El conector estÃ¡ marcado como no bloqueante y la operaciÃ³n solicitada lo bloquearÃa. Method WRITE! Error send() is 0 Level modify of Vol 50% Method READ! Send to socket id [5] and data is '[status]' hi0! send(): No route to host Method READ! Error send() is -1 STATUS THREAD -1 Method READ! Send to socket id [5] and data is '[status]' # </code></pre> But the socket number is incorrect should be 3 or 4, the next code : In main() <pre><code>... for(t=0;t<NUM_THREADS;t++) { printf("What's IP [%s] to connected now? %d\n",regIPConnected[t].ip,regIPConnected[t].idSocket); </code></pre> idSocket=regIPConnected[t].idSocket; <pre><code> rc = pthread_create(&(thread[t]), &attr,conectaThread,&idSocket); if (rc) { printf("ERROR; return code from pthread_create() is %d\n", rc); } }//END FOR printf("Out for\n\n!"); /* Free attribute and wait for the other threads */ pthread_attr_destroy(&attr); for(t=0; t<NUM_THREADS; t++) { rc = pthread_join(thread[t], &status); if (rc<0) { printf("ERROR; return code from pthread_join() is %d\n", rc); } printf("Main: completed join with thread %ld having a status of %ld\n",t,(long)status); }//END FOR printf("Main: program completed. Exiting.\n"); pthread_exit(NULL); </code></pre> } The other code is same. Why not to get the first socket "3" and get the finish socket 5?? and why to finish the threads? Thanks
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<c><sockets>
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Socket and thread in C
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1. PO
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