//Client thread for RX IQ stream
void* client_thread(void* arg) {
CLIENT* client=(CLIENT*)arg;
int old_state, old_type;
char command[80];
int bytes_read;
const char* response;
client->receiver_state=RECEIVER_DETACHED;
client->transmitter_state=TRANSMITTER_DETACHED;
client->receiver_num=-1;
pthread_mutex_init(&client->mox_lock, NULL );
set_mox(client,0);
pthread_setcancelstate(PTHREAD_CANCEL_ENABLE,&old_state);
pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS,&old_type);
while(1) {
bytes_read=recv(client->socket,command,sizeof(command),0);
if(bytes_read<=0) {
break;
}
command[bytes_read]=0;
response=parse_command(client,command);
send(client->socket,response,strlen(response),0);
fprintf(stderr,"Response to DSP client (Rx%d): '%s'\n",client->receiver_num,response);
}
fprintf(stderr,"Exiting DSP client thread loop (Rx%d)...\n",client->receiver_num);
//GRACEFUL EXIT ON DISCONNECTION
set_mox(client,0);
if(client->transmitter_state==TRANSMITTER_ATTACHED) {
stop_tx_audio(client); //Exits the tx_audio_thread @ transmitter
client->transmitter_state=TRANSMITTER_DETACHED;
}
sleep(1);
if(client->receiver_state==RECEIVER_ATTACHED) {
detach_receiver(client->receiver_num, client);
receiver[client->receiver_num].client=(CLIENT*)NULL;
client->receiver_state=RECEIVER_DETACHED;
}
client->bs_port=-1;
detach_bandscope(client);
#ifdef __linux__
close(client->socket);
#else
closesocket(client->socket);
#endif
fprintf(stderr,"Client Handler: Client disconnected: %s:%d\n",inet_ntoa(client->address.sin_addr),ntohs(client->address.sin_port));
free(client);
return 0;
}
void* client_thread(void* arg) {
CLIENT* client=(CLIENT*)arg;
char command[80];
int bytes_read;
const char* response;
client->receiver_state=RECEIVER_DETACHED;
client->transmitter_state=TRANSMITTER_DETACHED;
client->receiver=-1;
client->mox=0;
while(1) {
bytes_read=recv(client->socket,command,sizeof(command),0);
if(bytes_read<=0) {
break;
}
command[bytes_read]=0;
response=parse_command(client,command);
send(client->socket,response,strlen(response),0);
fprintf(stderr,"Response to DSP client (Rx%d): '%s'\n",client->receiver,response);
}
fprintf(stderr,"Exiting DSP client thread loop (Rx%d)...\n",client->receiver);
if(client->receiver_state==RECEIVER_ATTACHED) {
receiver[client->receiver].client=(CLIENT*)NULL;
client->receiver_state=RECEIVER_DETACHED;
}
if(client->transmitter_state==TRANSMITTER_ATTACHED) {
client->transmitter_state=TRANSMITTER_DETACHED;
}
client->mox=0;
client->bs_port=-1;
detach_bandscope(client);
#ifdef __linux__
close(client->socket);
#else
closesocket(client->socket);
#endif
fprintf(stderr,"Clint Handler: Client disconnected: %s:%d\n",inet_ntoa(client->address.sin_addr),ntohs(client->address.sin_port));
free(client);
return 0;
}
const char* parse_command(CLIENT* client,char* command) {
char* token;
fprintf(stderr,"parse_command(Rx%d): '%s'\n",client->receiver,command);
token=strtok(command," \r\n");
if(token!=NULL) {
if(strcmp(token,"attach")==0) {
//COMMAND: 'attach <side>'
token=strtok(NULL," \r\n");
if(token!=NULL) {
if(strcmp(token,"tx")==0) {
//COMMAND: 'attach tx'
return attach_transmitter(client);
} else {
//COMMAND: 'attach rx#'
int rx=atoi(token);
return attach_receiver(rx,client);
}
} else {
return INVALID_COMMAND;
}
} else if(strcmp(token,"detach")==0) {
//COMMAND: 'detach <side>'
token=strtok(NULL," \r\n");
if(token!=NULL) {
int rx=atoi(token);
return detach_receiver(rx,client);
} else {
return INVALID_COMMAND;
}
} else if(strcmp(token,"frequency")==0) {
//COMMAND: 'frequency <long freq>'
token=strtok(NULL," \r\n");
if(token!=NULL) {
long f=atol(token);
return set_frequency(client,f);
} else {
return INVALID_COMMAND;
}
} else if(strcmp(token,"start")==0) {
//COMMAND: 'start <stream> <port#>'
token=strtok(NULL," \r\n");
if(token!=NULL) {
if(strcmp(token,"iq")==0) {
//COMMAND: 'start iq <port#>'
token=strtok(NULL," \r\n");
if(token!=NULL) {
client->iq_port=atoi(token);
}
// starts the thread to acquire USRP samples
usrp_start (&receiver[client->receiver]);
fprintf(stderr,"Started USRP for RX%d\n",client->receiver);
//Start the audio thread
if(pthread_create(&receiver[client->receiver].audio_thread_id,NULL,audio_thread,client)!=0) {
fprintf(stderr,"Failed to create audio thread for rx %d\n",client->receiver);
exit(1);
}
return OK;
} else if(strcmp(token,"bandscope")==0) {
//COMMAND: 'start bandscope <port#>'
token=strtok(NULL," \r\n");
if(token!=NULL) {
client->bs_port=atoi(token);
}
attach_bandscope(client);
return OK;
} else {
// invalid command string
return INVALID_COMMAND;
}
} else {
// invalid command string
return INVALID_COMMAND;
}
} else if(strcmp(token,"stop")==0) {
//COMMAND: 'stop <stream>'
token=strtok(NULL," \r\n");
if(token!=NULL) {
if(strcmp(token,"iq")==0) {
//COMMAND: 'stop iq'
token=strtok(NULL," \r\n");
if(token!=NULL) {
client->iq_port=-1;
}
return OK;
} else if(strcmp(token,"bandscope")==0) {
//COMMAND: 'stop bandscope'
client->bs_port=-1;
detach_bandscope(client);
} else {
// invalid command string
return INVALID_COMMAND;
}
} else {
// invalid command string
return INVALID_COMMAND;
}
} else if(strcmp(token,"preamp")==0) {
return NOT_IMPLEMENTED_COMMAND;
} else if(strcmp(token,"record")==0) {
return NOT_IMPLEMENTED_COMMAND;
} else if(strcmp(token,"mox")==0) {
return NOT_IMPLEMENTED_COMMAND;
} else if(strcmp(token,"ocoutput")==0) {
return NOT_IMPLEMENTED_COMMAND;
} else {
// invalid command string
return INVALID_COMMAND;
}
} else {
// empty command string
return INVALID_COMMAND;
}
return INVALID_COMMAND;
}
const char* parse_command(CLIENT* client,char* command) {
char* token;
fprintf(stderr,"parse_command(Rx%d): '%s'\n",client->receiver_num,command);
token=strtok(command," \r\n");
if(token!=NULL) {
if(strcmp(token,"attach")==0) {
//COMMAND: 'attach <side>'
token=strtok(NULL," \r\n");
if(token!=NULL) {
//COMMAND: 'attach rx#'
int rx=atoi(token);
const char *resp=attach_receiver(rx,client);
if (strcmp(resp, "Error") == 0)
return resp;
else
return attach_transmitter(client, resp);
}
} else if(strcmp(token,"detach")==0) {
//COMMAND: 'detach <side>'
token=strtok(NULL," \r\n");
if(token!=NULL) {
int rx=atoi(token);
return detach_receiver(rx,client);
} else {
return INVALID_COMMAND;
}
} else if(strcmp(token,"frequency")==0) {
//COMMAND: 'frequency <long freq>'
token=strtok(NULL," \r\n");
if(token!=NULL) {
long f=atol(token);
return set_frequency(client,f);
} else {
return INVALID_COMMAND;
}
} else if(strcmp(token,"start")==0) {
//COMMAND: 'start <stream> <port#>'
token=strtok(NULL," \r\n");
if(token!=NULL) {
if(strcmp(token,"iq")==0) {
//COMMAND: 'start iq <port#>'
token=strtok(NULL," \r\n");
if(token!=NULL) {
client->iq_port=atoi(token);
}
//NOTE:as it is now the usrp-server, only receiver 0's is supported
//then it is the only one to issue 'start' command.
if (usrp_start_rx_forwarder_thread(client)!=0) exit(1);
sleep(1); //some settling time...
//This is executed only once
if (! usrp_is_started()) {
if (usrp_start (client))
fprintf(stderr,"Started USRP for Client %d\n",client->receiver_num);
else {
fprintf(stderr,"USRP threads start FAILED for rx %d\n",client->receiver_num);
exit(1);
}
}
sleep(1); //some settling time
//Start the server side tx audio stream receiving thread
//Exit program if failed (...?)
if (start_tx_audio_thread(client)!=0) exit(1);
return OK;
} else if(strcmp(token,"bandscope")==0) {
//COMMAND: 'start bandscope <port#>'
token=strtok(NULL," \r\n");
if(token!=NULL) {
client->bs_port=atoi(token);
}
attach_bandscope(client);
return OK;
} else {
// invalid command string
return INVALID_COMMAND;
}
} else {
// invalid command string
return INVALID_COMMAND;
}
} else if(strcmp(token,"stop")==0) {
//COMMAND: 'stop <stream>'
token=strtok(NULL," \r\n");
if(token!=NULL) {
if(strcmp(token,"iq")==0) {
//COMMAND: 'stop iq'
token=strtok(NULL," \r\n");
if(token!=NULL) {
client->iq_port=-1;
}
return OK;
} else if(strcmp(token,"bandscope")==0) {
//COMMAND: 'stop bandscope'
client->bs_port=-1;
detach_bandscope(client);
} else {
// invalid command string
return INVALID_COMMAND;
}
} else {
// invalid command string
return INVALID_COMMAND;
}
} else if(strcmp(token,"mox")==0) {
//Toggle the mox
int v=toggle_mox(client);
fprintf(stderr,"Toggled mox to %d for Client %d\n",v, client->receiver_num);
return OK;
} else if(strcmp(token,"preamp")==0) {
return NOT_IMPLEMENTED_COMMAND;
} else if(strcmp(token,"record")==0) {
return NOT_IMPLEMENTED_COMMAND;
} else if(strcmp(token,"ocoutput")==0) {
return NOT_IMPLEMENTED_COMMAND;
} else {
// invalid command string
return INVALID_COMMAND;
}
}
// empty command string
return INVALID_COMMAND;
}
