我需要在linux中使用socket发送数据。我正在使用套接字发送和管道接收数据。当我尝试在函数中发送数据时：SendGTSMessage，我发送数据值为空。
当我尝试访问Segmentation fault中的Bytessent时，我也收到SendGTSMessage错误。
SendGTSMessage函数从HandleGtsMessage函数调用。
任何见解都会有所帮助，
void* BeginGTSServer(void* arg)
{
char Buffer[1000];
char *interface= NULL;
unsigned short port=DEFAULT_PORT;
int retval;
socklen_t fromlen;
struct sockaddr_in local;
struct sockaddr_in from;
int listen_socket;
int continueMsgs = 1;
int errNumber;
char OutputString[255];
local.sin_family = AF_INET;
// local.sin_addr.s_addr = (!interface)?INADDR_ANY:inet_addr(interface);
local.sin_addr.s_addr =INADDR_ANY;
local.sin_port = htons(port);
listen_socket = socket(AF_INET,SOCK_STREAM,0); // TCP socket
logMessage("Socket Created.\n");
if (listen_socket<0)
{
sprintf(OutputString,"*** socket() failed with error %d\n",errno);
perror("Failed to create Socket");
MsgBox("Failed To create Socket");
// return;
}
if (bind(listen_socket,(struct sockaddr*)&local, sizeof(local)))
{
sprintf(OutputString,"*** bind() failed with error %d\n",errno);
perror("bind() failed with error");
MsgBox("bindfailed with error");
// MessageBox(NULL, OutputString,"ERROR", MB_OK );
// return;
}
logMessage("Socket Binded.\n");
if (listen(listen_socket,5) <0)
{
sprintf(OutputString,"*** listen() failed with error %d\n",errno);
perror("listen() failed with error");
MsgBox("listen() failed with error");
//MessageBox(NULL, OutputString,"ERROR", MB_OK );
// return;
}
logMessage("Listen Succeded.\n");
fromlen =sizeof(from);
glueDebug = true;
printf("listen_socket",listen_socket);
msgsock =accept(listen_socket,(struct sockaddr *) &from, &fromlen);
if (msgsock== -1)
{
sprintf(OutputString,"*** accept() error %d\n",errno);
perror("accept() error");
MsgBox("accept() error");
//MessageBox(NULL, OutputString,"ERROR", MB_OK );
// return;
}
GTSConnected = true;
logMessage("GTS Connected.\n");
while( 1 )
{
retval = recv(msgsock,Buffer,sizeof(Buffer),0 );
if (retval<0)
{
perror("Reading Stream Message Error");
errNumber = errno;
if (errno != ECONNREFUSED )
{
//fprintf(stderr,"*** recv() failed: error %d\n",errNumber);
}
}
else
{
errNumber = 0;
}
if (retval == 0 || errNumber == ECONNREFUSED )
{
logMessage("GTS connection terminated.\n");
MsgBox("GTS connection terminated.\n");
// We are waiting for a connection.
sprintf( GTSConnectionStatus, GTSNotConnected);
GTSConnected = false;
close(msgsock);
msgsock = accept(listen_socket,(struct sockaddr*)&from,(socklen_t *) &fromlen);
if (msgsock <0)
{
sprintf(OutputString,"*** accept() error %d\n",errno);
MsgBox("accept() error");
//MessageBox(NULL, OutputString,"ERROR", MB_OK );
//return;
}
GTSConnected = true;
continue;
}
// Null terminate the string. Ignore the 0x85 at the end.
Buffer[retval-1] = 0;
logMessage("Buffer Message",&Buffer[4]);
HandleGTSMessages(&Buffer[4]);
logMessage("Message passed to handle function");
continue;
}
}
void HandleGTSMessages(char *Message)
{
int loop;
char LocalMsgBuffer[1024];
char strippedMessage[1024];
// char Message[1024];
char *ProgramArgument[9] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL};
logMessage("Program:%s\n",Message);
if (!strncmp(Message,"IsProgRunning",strlen("IsProgRunning")))
{
if (TstProgramConnected)
sprintf(LocalMsgBuffer, "True:%s",executingVSProgram);
else
sprintf(LocalMsgBuffer, "False");
SendGTSMessage(LocalMsgBuffer, strlen(LocalMsgBuffer), true);
return;
}
else if (!strncmp(Message,"InfoRequest", strlen("InfoRequest")))
{
char hostname[255];
char cwd[1024];
char stationType[25];
strcpy(hostname,"unknown");
gethostname(hostname,254);
getcwd( cwd, 1023 );
strcpy(stationType,"Unknown");
loop = 0;
while (Station[loop].StationString[0] != 0)
{
if (FileExist(Station[loop].FileTest))
{
strcpy(stationType,Station[loop].StationString);
break;
}
loop++;
}
sprintf(LocalMsgBuffertest,"Version: %s\n,HostName:%s\n,Execution Dir:%s\n,Station Type:%s",
VERSION,hostname,cwd,stationType);
logMessage("Info Request:%s\n",LocalMsgBuffertest);
SendGTSMessage(LocalMsgBuffertest,strlen(LocalMsgBuffertest),true);
return;
}
}
int SendGTSMessage(char *MsgToSend, int msgLength, bool forceMsgExactly)
{
char Buffer[1000];
int bytesSent;
int ShiftedMsgLength;
struct hostent *hp;
struct sockaddr_in server;
char dum[40];
/* local.sin_family = AF_INET;
local.sin_addr.s_addr =INADDR_ANY;
local.sin_port = htons(port);
sock=socket(AF_INET, SOCK_STREAM, 0);
connect(sock,(struct sockaddr*)&local, sizeof(local));
logMessage("connected with send gts",MsgToSend);
GTSConnected =true;*/
int sock;
sock = socket(AF_INET, SOCK_STREAM, 0);
char buffer[256];
char hostname[1024];
server.sin_family = AF_INET;
gethostname(hostname,sizeof(hostname));
hp = gethostbyname(hostname);
memcpy(&server.sin_addr,hp->h_addr,hp->h_length);
server.sin_port = htons(port);
connect(sock,(struct sockaddr *) &server,sizeof(server));
if (GTSConnected == true)
{
// Overwrite the normal message, if we ran the crmvs program to disable
// or enable telemetry.
if ((ExecutingBuiltInProgram) && (forceMsgExactly == false))
{
HandleGTSMessages("ADV");
if (strstr(MsgToSend,"PASSED"))
// Advance the telemetry command.
MsgToSend = BuiltInPassedMsg;
else
MsgToSend = BuiltInFailedMsg;
msgLength = strlen (MsgToSend);
}
// Copy in the msg to send, and terminate it with a 0x85.
strncpy(&Buffer[4], MsgToSend, msgLength);
// logMessage("Message Length %s\n", msgLength);
*(Buffer+msgLength+4) = (char)0x55;
ShiftedMsgLength = (msgLength) << 8;
memcpy(&Buffer[0], &ShiftedMsgLength, 4);
*(Buffer) = (char)0xaa;
bytesSent = send(sock,Buffer,msgLength+5,0);
logMessage("Message Length %s\n",Buffer);
if (bytesSent <0)
{
// Just re-use the same buffer for the error message.
sprintf(Buffer,"*** send() failed: error %d\n",strerror(errno));
MsgBox("Send() Failed");
// MessageBox(NULL, Buffer,"ERROR", MB_OK );
}
}
//logMessage("Bytes Sent %s\n",bytesSent);
// return bytesSent;*/
}