int main(int argc, char *argv[]) {
int retcode;
LOG_TRACE(LOG_INFORMATIONAL, "\nServer started. Is now initializing the setup...\n");
signal(SIGINT, my_handler);
LOG_TRACE(LOG_INFORMATIONAL, "Setting up the valid arguments...");
setValidServerArguments(); //setting up all valid arguments
LOG_TRACE(LOG_INFORMATIONAL, "... Done\n");
retcode = setup_shm();
handle_error(retcode, "Shared Memory could not be created.\n", PROCESS_EXIT);
char *shm_start = shmat(shm_id, NULL, 0);
LOG_TRACE(LOG_INFORMATIONAL, "... Done\n");
/* init shared memory control*/
retcode = initshm(shm_start);
handle_error(retcode, "Could not create Shared Memory Control Set...\n", PROCESS_EXIT);
/* init struct for PThread handling Clients */
myPThreadStruct = (struct pthread_struct *) malloc(sizeof(struct pthread_struct));
myPThreadStruct->isLast = 1;
myPThreadStruct->nextClient = myPThreadStruct;
/* if no arguments is chosen, output the usage of the Server */
if (argc == 1) {
usage();
exit(1);
}
/* if arguments are chosen, validate the arguments */
else {
printf("Verify valid arguments ...\n");
initValidServerArguments(argc, argv);
}
/* if no port for the server was chosen, set it to default port = 7000 */
if (validArguments[1].isSet == 0) {
printf("There was no argument for the Server-Port. It will no be set to default = 7000\n");
ServerPort = 7000;
validArguments[1].isSet = 1;
}
retcode = setTCPServer();
handle_error(retcode, "TCP Server settings could not be established!\n", PROCESS_EXIT);
ServerListen();
/* clean up shared memory */
cleanup(shm_id);
}
CNullModem::CNullModem(Bitu id, CommandLine* cmd):CSerial (id, cmd) {
Bitu temptcpport=23;
memset(&telClient, 0, sizeof(telClient));
InstallationSuccessful = false;
serversocket = 0;
clientsocket = 0;
serverport = 0;
clientport = 0;
rx_retry = 0;
rx_retry_max = 20;
rx_state=N_RX_DISC;
tx_gather = 12;
dtrrespect=false;
tx_block=false;
receiveblock=false;
transparent=false;
telnet=false;
Bitu bool_temp=0;
// usedtr: The nullmodem will
// 1) when it is client connect to the server not immediately but
// as soon as a modem-aware application is started (DTR is switched on).
// 2) only receive data when DTR is on.
if (getBituSubstring("usedtr:", &bool_temp, cmd)) {
if (bool_temp==1) {
dtrrespect=true;
transparent=true;
DTR_delta=false; // connect immediately when DTR is already 1
}
}
// transparent: don't add additional handshake control.
if (getBituSubstring("transparent:", &bool_temp, cmd)) {
if (bool_temp==1) transparent=true;
else transparent=false;
}
// telnet: interpret telnet commands.
if (getBituSubstring("telnet:", &bool_temp, cmd)) {
if (bool_temp==1) {
transparent=true;
telnet=true;
}
}
// rxdelay: How many milliseconds to wait before causing an
// overflow when the application is unresponsive.
if (getBituSubstring("rxdelay:", &rx_retry_max, cmd)) {
if (!(rx_retry_max<=10000)) {
rx_retry_max=50;
}
}
// txdelay: How many milliseconds to wait before sending data.
// This reduces network overhead quite a lot.
if (getBituSubstring("txdelay:", &tx_gather, cmd)) {
if (!(tx_gather<=500)) {
tx_gather=12;
}
}
// port is for both server and client
if (getBituSubstring("port:", &temptcpport, cmd)) {
if (!(temptcpport>0&&temptcpport<65536)) {
temptcpport=23;
}
}
// socket inheritance (client-alike)
if (getBituSubstring("inhsocket:", &bool_temp, cmd)) {
#ifdef NATIVESOCKETS
if (Netwrapper_GetCapabilities()&NETWRAPPER_TCP_NATIVESOCKET) {
if (bool_temp==1) {
int sock;
if (control->cmdline->FindInt("-socket",sock,true)) {
dtrrespect=false;
transparent=true;
LOG_MSG("Inheritance socket handle: %d",sock);
if (!ClientConnect(new TCPClientSocket(sock)))
return;
} else {
LOG_MSG("Serial%d: -socket parameter missing.",COMNUMBER);
return;
}
}
} else {
LOG_MSG("Serial%d: socket inheritance not supported on this platform.",
COMNUMBER);
return;
}
#else
LOG_MSG("Serial%d: socket inheritance not available.", COMNUMBER);
#endif
} else {
// normal server/client
std::string tmpstring;
if (cmd->FindStringBegin("server:",tmpstring,false)) {
// we are a client
const char* hostnamechar=tmpstring.c_str();
size_t hostlen=strlen(hostnamechar)+1;
if (hostlen>sizeof(hostnamebuffer)) {
hostlen=sizeof(hostnamebuffer);
hostnamebuffer[sizeof(hostnamebuffer)-1]=0;
}
memcpy(hostnamebuffer,hostnamechar,hostlen);
clientport=(Bit16u)temptcpport;
if (dtrrespect) {
// we connect as soon as DTR is switched on
setEvent(SERIAL_NULLMODEM_DTR_EVENT, 50);
LOG_MSG("Serial%d: Waiting for DTR...",COMNUMBER);
} else if (!ClientConnect(
new TCPClientSocket((char*)hostnamebuffer,(Bit16u)clientport)))
return;
} else {
// we are a server
serverport = (Bit16u)temptcpport;
if (!ServerListen()) return;
}
}
CSerial::Init_Registers();
InstallationSuccessful = true;
setCTS(dtrrespect||transparent);
setDSR(dtrrespect||transparent);
setRI(false);
setCD(clientsocket > 0); // CD on if connection established
}
