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| 2 | /********************************************************************\
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| 3 |
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| 4 | Name: CCCommand.cc
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| 5 |
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| 6 | Created by: Oliver Grimm, Sebastian Commichau, January 2009
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| 7 | oliver.grimm@phys.ethz.ch, commichau@phys.ethz.ch
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| 8 |
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| 9 | Actions: Listen to commands from Central Control (CC)
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| 10 |
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| 11 | \********************************************************************/
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| 12 |
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| 13 | #include "CCCommand.h"
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| 14 |
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| 15 |
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| 16 | void CCCommand(ProcessIO *m) {
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| 17 |
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| 18 | siginterrupt(SIGUSR1, true);
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| 19 |
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| 20 | int ServerSocket,ConnectionSocket,ReadResult;
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| 21 | struct sockaddr_in SocketAddress, ClientAddress;
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| 22 | socklen_t SizeClientAddress=sizeof(ClientAddress);
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| 23 | char comline[MAX_COM_SIZE], str[MAX_COM_SIZE];
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| 24 |
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| 25 | // Set up server socket
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| 26 | if ((ServerSocket = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
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| 27 | sprintf(str,"error: could not open server socket, no remote connection possible");
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| 28 | m->PrintMessage(str);
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| 29 | return;
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| 30 | }
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| 31 |
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| 32 | // Allows immediate reuse of socket after closing (circumvents TIME_WAIT)
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| 33 | int Value=1;
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| 34 | if (setsockopt(ServerSocket, SOL_SOCKET, SO_REUSEADDR, (char *) &Value, sizeof (Value)) == -1) {
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| 35 | sprintf(str,"Warning: Could not set server socket option SO_REUSEADDR (%s).\n",strerror(errno));
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| 36 | m->PrintMessage(str);
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| 37 | }
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| 38 |
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| 39 | SocketAddress.sin_family = PF_INET;
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| 40 | SocketAddress.sin_port = htons((unsigned short) m->config->fCCPort);
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| 41 | SocketAddress.sin_addr.s_addr = INADDR_ANY;
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| 42 |
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| 43 | if (bind(ServerSocket, (struct sockaddr *) &SocketAddress, sizeof(SocketAddress)) == -1) {
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| 44 | sprintf(str,"error: could not bind port to socket");
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| 45 | m->PrintMessage(str);
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| 46 | close(ServerSocket);
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| 47 | return;
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| 48 | }
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| 49 | if (listen(ServerSocket, 0) == -1) {
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| 50 | sprintf(str,"error: could not set socket to listening");
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| 51 | m->PrintMessage(str);
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| 52 | close(ServerSocket);
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| 53 | return;
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| 54 | }
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| 55 |
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| 56 | while (!m->status->Exit) { // Looping to wait for incoming connection
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| 57 |
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| 58 | if ((ConnectionSocket = accept(ServerSocket, (struct sockaddr *) &ClientAddress, &SizeClientAddress)) == -1) {
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| 59 | if (errno!=EINTR) {
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| 60 | sprintf(str,"error: failed to accept incoming connection");
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| 61 | m->PrintMessage(str);
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| 62 | }
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| 63 | close(ServerSocket);
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| 64 | return;
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| 65 | }
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| 66 |
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| 67 | pthread_mutex_lock(&m->control_mutex);
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| 68 | m->status->Socket = ConnectionSocket;
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| 69 | m->status->cc_state = connected;
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| 70 | sprintf(str,"connected to client (%s)",inet_ntoa(ClientAddress.sin_addr));
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| 71 | m->PrintMessage(str);
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| 72 | pthread_mutex_unlock(&m->control_mutex);
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| 73 |
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| 74 | while (!m->status->Exit) { // Looping as long as client exists
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| 75 | bzero(comline,sizeof(comline));
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| 76 | ReadResult = read(ConnectionSocket, comline, MAX_COM_SIZE);
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| 77 | if (ReadResult==0) break; // Client does not exist anymore
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| 78 | if (ReadResult==-1) {
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| 79 | if (errno!=EINTR) {
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| 80 | sprintf(str,"error: socket read failed");
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| 81 | m->PrintMessage(str);
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| 82 | }
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| 83 | break;
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| 84 | }
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| 85 |
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| 86 | m->status->Pc = comline;
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| 87 |
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| 88 | ParseInput(m->status->Pc,&(m->status->NParam),m->status->Param);
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| 89 |
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| 90 | if (!(Match(m->status->Param[0], "exit") || Match(m->status->Param[0], "quit"))) {
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| 91 |
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| 92 | sprintf(str,"CC> %s",m->status->Pc);
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| 93 | m->log->LogWrite(str);
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| 94 |
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| 95 | sprintf(str,"%s",m->status->Pc);
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| 96 | printf(str);
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| 97 |
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| 98 | pthread_mutex_lock(&m->control_mutex);
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| 99 | // Process CC command
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| 100 | if (m->CommandControl()==0)
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| 101 | pthread_cond_broadcast(&m->control_cond);
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| 102 | pthread_mutex_unlock(&m->control_mutex);
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| 103 |
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| 104 | }
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| 105 | else
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| 106 | printf("remote exit|quit forbidden\n");
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| 107 |
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| 108 | m->PrintMessage(NULL);
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| 109 |
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| 110 | }
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| 111 |
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| 112 | if (!(m->status->Exit)) {
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| 113 | sprintf(str,"disconnected from client (%s)",inet_ntoa(ClientAddress.sin_addr));
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| 114 | m->PrintMessage(str);
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| 115 | }
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| 116 | m->status->Socket = -1;
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| 117 | pthread_mutex_lock(&m->control_mutex);
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| 118 | m->status->cc_state = disconnected;
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| 119 | pthread_mutex_unlock(&m->control_mutex);
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| 120 | close(ConnectionSocket);
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| 121 |
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| 122 | }
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| 123 | close(ServerSocket);
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| 124 |
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| 125 | }
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